1 /*
2  * Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
3  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4  * Copyright (c) 2020 Ori Bernstein <ori@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <sys/queue.h>
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <sys/param.h>
23 #include <sys/wait.h>
24 
25 #include <err.h>
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <limits.h>
29 #include <locale.h>
30 #include <ctype.h>
31 #include <signal.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <unistd.h>
36 #include <libgen.h>
37 #include <time.h>
38 #include <paths.h>
39 #include <regex.h>
40 #include <getopt.h>
41 #include <util.h>
42 
43 #include "got_version.h"
44 #include "got_error.h"
45 #include "got_object.h"
46 #include "got_reference.h"
47 #include "got_repository.h"
48 #include "got_path.h"
49 #include "got_cancel.h"
50 #include "got_worktree.h"
51 #include "got_diff.h"
52 #include "got_commit_graph.h"
53 #include "got_fetch.h"
54 #include "got_blame.h"
55 #include "got_privsep.h"
56 #include "got_opentemp.h"
57 #include "got_gotconfig.h"
58 
59 #ifndef nitems
60 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
61 #endif
62 
63 static volatile sig_atomic_t sigint_received;
64 static volatile sig_atomic_t sigpipe_received;
65 
66 static void
67 catch_sigint(int signo)
68 {
69 	sigint_received = 1;
70 }
71 
72 static void
73 catch_sigpipe(int signo)
74 {
75 	sigpipe_received = 1;
76 }
77 
78 
79 struct got_cmd {
80 	const char	*cmd_name;
81 	const struct got_error *(*cmd_main)(int, char *[]);
82 	void		(*cmd_usage)(void);
83 	const char	*cmd_alias;
84 };
85 
86 __dead static void	usage(int, int);
87 __dead static void	usage_init(void);
88 __dead static void	usage_import(void);
89 __dead static void	usage_clone(void);
90 __dead static void	usage_fetch(void);
91 __dead static void	usage_checkout(void);
92 __dead static void	usage_update(void);
93 __dead static void	usage_log(void);
94 __dead static void	usage_diff(void);
95 __dead static void	usage_blame(void);
96 __dead static void	usage_tree(void);
97 __dead static void	usage_status(void);
98 __dead static void	usage_ref(void);
99 __dead static void	usage_branch(void);
100 __dead static void	usage_tag(void);
101 __dead static void	usage_add(void);
102 __dead static void	usage_remove(void);
103 __dead static void	usage_revert(void);
104 __dead static void	usage_commit(void);
105 __dead static void	usage_cherrypick(void);
106 __dead static void	usage_backout(void);
107 __dead static void	usage_rebase(void);
108 __dead static void	usage_histedit(void);
109 __dead static void	usage_integrate(void);
110 __dead static void	usage_stage(void);
111 __dead static void	usage_unstage(void);
112 __dead static void	usage_cat(void);
113 __dead static void	usage_info(void);
114 
115 static const struct got_error*		cmd_init(int, char *[]);
116 static const struct got_error*		cmd_import(int, char *[]);
117 static const struct got_error*		cmd_clone(int, char *[]);
118 static const struct got_error*		cmd_fetch(int, char *[]);
119 static const struct got_error*		cmd_checkout(int, char *[]);
120 static const struct got_error*		cmd_update(int, char *[]);
121 static const struct got_error*		cmd_log(int, char *[]);
122 static const struct got_error*		cmd_diff(int, char *[]);
123 static const struct got_error*		cmd_blame(int, char *[]);
124 static const struct got_error*		cmd_tree(int, char *[]);
125 static const struct got_error*		cmd_status(int, char *[]);
126 static const struct got_error*		cmd_ref(int, char *[]);
127 static const struct got_error*		cmd_branch(int, char *[]);
128 static const struct got_error*		cmd_tag(int, char *[]);
129 static const struct got_error*		cmd_add(int, char *[]);
130 static const struct got_error*		cmd_remove(int, char *[]);
131 static const struct got_error*		cmd_revert(int, char *[]);
132 static const struct got_error*		cmd_commit(int, char *[]);
133 static const struct got_error*		cmd_cherrypick(int, char *[]);
134 static const struct got_error*		cmd_backout(int, char *[]);
135 static const struct got_error*		cmd_rebase(int, char *[]);
136 static const struct got_error*		cmd_histedit(int, char *[]);
137 static const struct got_error*		cmd_integrate(int, char *[]);
138 static const struct got_error*		cmd_stage(int, char *[]);
139 static const struct got_error*		cmd_unstage(int, char *[]);
140 static const struct got_error*		cmd_cat(int, char *[]);
141 static const struct got_error*		cmd_info(int, char *[]);
142 
143 static struct got_cmd got_commands[] = {
144 	{ "init",	cmd_init,	usage_init,	"" },
145 	{ "import",	cmd_import,	usage_import,	"im" },
146 	{ "clone",	cmd_clone,	usage_clone,	"cl" },
147 	{ "fetch",	cmd_fetch,	usage_fetch,	"fe" },
148 	{ "checkout",	cmd_checkout,	usage_checkout,	"co" },
149 	{ "update",	cmd_update,	usage_update,	"up" },
150 	{ "log",	cmd_log,	usage_log,	"" },
151 	{ "diff",	cmd_diff,	usage_diff,	"di" },
152 	{ "blame",	cmd_blame,	usage_blame,	"bl" },
153 	{ "tree",	cmd_tree,	usage_tree,	"tr" },
154 	{ "status",	cmd_status,	usage_status,	"st" },
155 	{ "ref",	cmd_ref,	usage_ref,	"" },
156 	{ "branch",	cmd_branch,	usage_branch,	"br" },
157 	{ "tag",	cmd_tag,	usage_tag,	"" },
158 	{ "add",	cmd_add,	usage_add,	"" },
159 	{ "remove",	cmd_remove,	usage_remove,	"rm" },
160 	{ "revert",	cmd_revert,	usage_revert,	"rv" },
161 	{ "commit",	cmd_commit,	usage_commit,	"ci" },
162 	{ "cherrypick",	cmd_cherrypick,	usage_cherrypick, "cy" },
163 	{ "backout",	cmd_backout,	usage_backout,	"bo" },
164 	{ "rebase",	cmd_rebase,	usage_rebase,	"rb" },
165 	{ "histedit",	cmd_histedit,	usage_histedit,	"he" },
166 	{ "integrate",  cmd_integrate,  usage_integrate,"ig" },
167 	{ "stage",	cmd_stage,	usage_stage,	"sg" },
168 	{ "unstage",	cmd_unstage,	usage_unstage,	"ug" },
169 	{ "cat",	cmd_cat,	usage_cat,	"" },
170 	{ "info",	cmd_info,	usage_info,	"" },
171 };
172 
173 static void
174 list_commands(FILE *fp)
175 {
176 	size_t i;
177 
178 	fprintf(fp, "commands:");
179 	for (i = 0; i < nitems(got_commands); i++) {
180 		struct got_cmd *cmd = &got_commands[i];
181 		fprintf(fp, " %s", cmd->cmd_name);
182 	}
183 	fputc('\n', fp);
184 }
185 
186 __dead static void
187 option_conflict(char a, char b)
188 {
189 	errx(1, "-%c and -%c options are mutually exclusive", a, b);
190 }
191 
192 int
193 main(int argc, char *argv[])
194 {
195 	struct got_cmd *cmd;
196 	size_t i;
197 	int ch;
198 	int hflag = 0, Vflag = 0;
199 	static struct option longopts[] = {
200 	    { "version", no_argument, NULL, 'V' },
201 	    { NULL, 0, NULL, 0 }
202 	};
203 
204 	setlocale(LC_CTYPE, "");
205 
206 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
207 		switch (ch) {
208 		case 'h':
209 			hflag = 1;
210 			break;
211 		case 'V':
212 			Vflag = 1;
213 			break;
214 		default:
215 			usage(hflag, 1);
216 			/* NOTREACHED */
217 		}
218 	}
219 
220 	argc -= optind;
221 	argv += optind;
222 	optind = 1;
223 	optreset = 1;
224 
225 	if (Vflag) {
226 		got_version_print_str();
227 		return 0;
228 	}
229 
230 	if (argc <= 0)
231 		usage(hflag, hflag ? 0 : 1);
232 
233 	signal(SIGINT, catch_sigint);
234 	signal(SIGPIPE, catch_sigpipe);
235 
236 	for (i = 0; i < nitems(got_commands); i++) {
237 		const struct got_error *error;
238 
239 		cmd = &got_commands[i];
240 
241 		if (strcmp(cmd->cmd_name, argv[0]) != 0 &&
242 		    strcmp(cmd->cmd_alias, argv[0]) != 0)
243 			continue;
244 
245 		if (hflag)
246 			got_commands[i].cmd_usage();
247 
248 		error = got_commands[i].cmd_main(argc, argv);
249 		if (error && error->code != GOT_ERR_CANCELLED &&
250 		    error->code != GOT_ERR_PRIVSEP_EXIT &&
251 		    !(sigpipe_received &&
252 		      error->code == GOT_ERR_ERRNO && errno == EPIPE) &&
253 		    !(sigint_received &&
254 		      error->code == GOT_ERR_ERRNO && errno == EINTR)) {
255 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
256 			return 1;
257 		}
258 
259 		return 0;
260 	}
261 
262 	fprintf(stderr, "%s: unknown command '%s'\n", getprogname(), argv[0]);
263 	list_commands(stderr);
264 	return 1;
265 }
266 
267 __dead static void
268 usage(int hflag, int status)
269 {
270 	FILE *fp = (status == 0) ? stdout : stderr;
271 
272 	fprintf(fp, "usage: %s [-h] [-V | --version] command [arg ...]\n",
273 	    getprogname());
274 	if (hflag)
275 		list_commands(fp);
276 	exit(status);
277 }
278 
279 static const struct got_error *
280 get_editor(char **abspath)
281 {
282 	const struct got_error *err = NULL;
283 	const char *editor;
284 
285 	*abspath = NULL;
286 
287 	editor = getenv("VISUAL");
288 	if (editor == NULL)
289 		editor = getenv("EDITOR");
290 
291 	if (editor) {
292 		err = got_path_find_prog(abspath, editor);
293 		if (err)
294 			return err;
295 	}
296 
297 	if (*abspath == NULL) {
298 		*abspath = strdup("/bin/ed");
299 		if (*abspath == NULL)
300 			return got_error_from_errno("strdup");
301 	}
302 
303 	return NULL;
304 }
305 
306 static const struct got_error *
307 apply_unveil(const char *repo_path, int repo_read_only,
308     const char *worktree_path)
309 {
310 	const struct got_error *err;
311 
312 #ifdef PROFILE
313 	if (unveil("gmon.out", "rwc") != 0)
314 		return got_error_from_errno2("unveil", "gmon.out");
315 #endif
316 	if (repo_path && unveil(repo_path, repo_read_only ? "r" : "rwc") != 0)
317 		return got_error_from_errno2("unveil", repo_path);
318 
319 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
320 		return got_error_from_errno2("unveil", worktree_path);
321 
322 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
323 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
324 
325 	err = got_privsep_unveil_exec_helpers();
326 	if (err != NULL)
327 		return err;
328 
329 	if (unveil(NULL, NULL) != 0)
330 		return got_error_from_errno("unveil");
331 
332 	return NULL;
333 }
334 
335 __dead static void
336 usage_init(void)
337 {
338 	fprintf(stderr, "usage: %s init repository-path\n", getprogname());
339 	exit(1);
340 }
341 
342 static const struct got_error *
343 cmd_init(int argc, char *argv[])
344 {
345 	const struct got_error *error = NULL;
346 	char *repo_path = NULL;
347 	int ch;
348 
349 	while ((ch = getopt(argc, argv, "")) != -1) {
350 		switch (ch) {
351 		default:
352 			usage_init();
353 			/* NOTREACHED */
354 		}
355 	}
356 
357 	argc -= optind;
358 	argv += optind;
359 
360 #ifndef PROFILE
361 	if (pledge("stdio rpath wpath cpath unveil", NULL) == -1)
362 		err(1, "pledge");
363 #endif
364 	if (argc != 1)
365 		usage_init();
366 
367 	repo_path = strdup(argv[0]);
368 	if (repo_path == NULL)
369 		return got_error_from_errno("strdup");
370 
371 	got_path_strip_trailing_slashes(repo_path);
372 
373 	error = got_path_mkdir(repo_path);
374 	if (error &&
375 	    !(error->code == GOT_ERR_ERRNO && errno == EEXIST))
376 		goto done;
377 
378 	error = apply_unveil(repo_path, 0, NULL);
379 	if (error)
380 		goto done;
381 
382 	error = got_repo_init(repo_path);
383 done:
384 	free(repo_path);
385 	return error;
386 }
387 
388 __dead static void
389 usage_import(void)
390 {
391 	fprintf(stderr, "usage: %s import [-b branch] [-m message] "
392 	    "[-r repository-path] [-I pattern] path\n", getprogname());
393 	exit(1);
394 }
395 
396 int
397 spawn_editor(const char *editor, const char *file)
398 {
399 	pid_t pid;
400 	sig_t sighup, sigint, sigquit;
401 	int st = -1;
402 
403 	sighup = signal(SIGHUP, SIG_IGN);
404 	sigint = signal(SIGINT, SIG_IGN);
405 	sigquit = signal(SIGQUIT, SIG_IGN);
406 
407 	switch (pid = fork()) {
408 	case -1:
409 		goto doneediting;
410 	case 0:
411 		execl(editor, editor, file, (char *)NULL);
412 		_exit(127);
413 	}
414 
415 	while (waitpid(pid, &st, 0) == -1)
416 		if (errno != EINTR)
417 			break;
418 
419 doneediting:
420 	(void)signal(SIGHUP, sighup);
421 	(void)signal(SIGINT, sigint);
422 	(void)signal(SIGQUIT, sigquit);
423 
424 	if (!WIFEXITED(st)) {
425 		errno = EINTR;
426 		return -1;
427 	}
428 
429 	return WEXITSTATUS(st);
430 }
431 
432 static const struct got_error *
433 edit_logmsg(char **logmsg, const char *editor, const char *logmsg_path,
434     const char *initial_content, size_t initial_content_len,
435     int require_modification)
436 {
437 	const struct got_error *err = NULL;
438 	char *line = NULL;
439 	size_t linesize = 0;
440 	ssize_t linelen;
441 	struct stat st, st2;
442 	FILE *fp = NULL;
443 	size_t len, logmsg_len;
444 	char *initial_content_stripped = NULL, *buf = NULL, *s;
445 
446 	*logmsg = NULL;
447 
448 	if (stat(logmsg_path, &st) == -1)
449 		return got_error_from_errno2("stat", logmsg_path);
450 
451 	if (spawn_editor(editor, logmsg_path) == -1)
452 		return got_error_from_errno("failed spawning editor");
453 
454 	if (stat(logmsg_path, &st2) == -1)
455 		return got_error_from_errno("stat");
456 
457 	if (require_modification &&
458 	    st.st_mtime == st2.st_mtime && st.st_size == st2.st_size)
459 		return got_error_msg(GOT_ERR_COMMIT_MSG_EMPTY,
460 		    "no changes made to commit message, aborting");
461 
462 	/*
463 	 * Set up a stripped version of the initial content without comments
464 	 * and blank lines. We need this in order to check if the message
465 	 * has in fact been edited.
466 	 */
467 	initial_content_stripped = malloc(initial_content_len + 1);
468 	if (initial_content_stripped == NULL)
469 		return got_error_from_errno("malloc");
470 	initial_content_stripped[0] = '\0';
471 
472 	buf = strdup(initial_content);
473 	if (buf == NULL) {
474 		err = got_error_from_errno("strdup");
475 		goto done;
476 	}
477 	s = buf;
478 	len = 0;
479 	while ((line = strsep(&s, "\n")) != NULL) {
480 		if ((line[0] == '#' || (len == 0 && line[0] == '\n')))
481 			continue; /* remove comments and leading empty lines */
482 		len = strlcat(initial_content_stripped, line,
483 		    initial_content_len + 1);
484 		if (len >= initial_content_len + 1) {
485 			err = got_error(GOT_ERR_NO_SPACE);
486 			goto done;
487 		}
488 	}
489 	while (len > 0 && initial_content_stripped[len - 1] == '\n') {
490 		initial_content_stripped[len - 1] = '\0';
491 		len--;
492 	}
493 
494 	logmsg_len = st2.st_size;
495 	*logmsg = malloc(logmsg_len + 1);
496 	if (*logmsg == NULL)
497 		return got_error_from_errno("malloc");
498 	(*logmsg)[0] = '\0';
499 
500 	fp = fopen(logmsg_path, "r");
501 	if (fp == NULL) {
502 		err = got_error_from_errno("fopen");
503 		goto done;
504 	}
505 
506 	len = 0;
507 	while ((linelen = getline(&line, &linesize, fp)) != -1) {
508 		if ((line[0] == '#' || (len == 0 && line[0] == '\n')))
509 			continue; /* remove comments and leading empty lines */
510 		len = strlcat(*logmsg, line, logmsg_len + 1);
511 		if (len >= logmsg_len + 1) {
512 			err = got_error(GOT_ERR_NO_SPACE);
513 			goto done;
514 		}
515 	}
516 	free(line);
517 	if (ferror(fp)) {
518 		err = got_ferror(fp, GOT_ERR_IO);
519 		goto done;
520 	}
521 	while (len > 0 && (*logmsg)[len - 1] == '\n') {
522 		(*logmsg)[len - 1] = '\0';
523 		len--;
524 	}
525 
526 	if (len == 0) {
527 		err = got_error_msg(GOT_ERR_COMMIT_MSG_EMPTY,
528 		    "commit message cannot be empty, aborting");
529 		goto done;
530 	}
531 	if (require_modification &&
532 	    strcmp(*logmsg, initial_content_stripped) == 0)
533 		err = got_error_msg(GOT_ERR_COMMIT_MSG_EMPTY,
534 		    "no changes made to commit message, aborting");
535 done:
536 	free(initial_content_stripped);
537 	free(buf);
538 	if (fp && fclose(fp) == EOF && err == NULL)
539 		err = got_error_from_errno("fclose");
540 	if (err) {
541 		free(*logmsg);
542 		*logmsg = NULL;
543 	}
544 	return err;
545 }
546 
547 static const struct got_error *
548 collect_import_msg(char **logmsg, char **logmsg_path, const char *editor,
549     const char *path_dir, const char *branch_name)
550 {
551 	char *initial_content = NULL;
552 	const struct got_error *err = NULL;
553 	int initial_content_len;
554 	int fd = -1;
555 
556 	initial_content_len = asprintf(&initial_content,
557 	    "\n# %s to be imported to branch %s\n", path_dir,
558 	    branch_name);
559 	if (initial_content_len == -1)
560 		return got_error_from_errno("asprintf");
561 
562 	err = got_opentemp_named_fd(logmsg_path, &fd,
563 	    GOT_TMPDIR_STR "/got-importmsg");
564 	if (err)
565 		goto done;
566 
567 	if (write(fd, initial_content, initial_content_len) == -1) {
568 		err = got_error_from_errno2("write", *logmsg_path);
569 		goto done;
570 	}
571 
572 	err = edit_logmsg(logmsg, editor, *logmsg_path, initial_content,
573 	    initial_content_len, 1);
574 done:
575 	if (fd != -1 && close(fd) == -1 && err == NULL)
576 		err = got_error_from_errno2("close", *logmsg_path);
577 	free(initial_content);
578 	if (err) {
579 		free(*logmsg_path);
580 		*logmsg_path = NULL;
581 	}
582 	return err;
583 }
584 
585 static const struct got_error *
586 import_progress(void *arg, const char *path)
587 {
588 	printf("A  %s\n", path);
589 	return NULL;
590 }
591 
592 static const struct got_error *
593 get_author(char **author, struct got_repository *repo,
594     struct got_worktree *worktree)
595 {
596 	const struct got_error *err = NULL;
597 	const char *got_author = NULL, *name, *email;
598 	const struct got_gotconfig *worktree_conf = NULL, *repo_conf = NULL;
599 
600 	*author = NULL;
601 
602 	if (worktree)
603 		worktree_conf = got_worktree_get_gotconfig(worktree);
604 	repo_conf = got_repo_get_gotconfig(repo);
605 
606 	/*
607 	 * Priority of potential author information sources, from most
608 	 * significant to least significant:
609 	 * 1) work tree's .got/got.conf file
610 	 * 2) repository's got.conf file
611 	 * 3) repository's git config file
612 	 * 4) environment variables
613 	 * 5) global git config files (in user's home directory or /etc)
614 	 */
615 
616 	if (worktree_conf)
617 		got_author = got_gotconfig_get_author(worktree_conf);
618 	if (got_author == NULL)
619 		got_author = got_gotconfig_get_author(repo_conf);
620 	if (got_author == NULL) {
621 		name = got_repo_get_gitconfig_author_name(repo);
622 		email = got_repo_get_gitconfig_author_email(repo);
623 		if (name && email) {
624 			if (asprintf(author, "%s <%s>", name, email) == -1)
625 				return got_error_from_errno("asprintf");
626 			return NULL;
627 		}
628 
629 		got_author = getenv("GOT_AUTHOR");
630 		if (got_author == NULL) {
631 			name = got_repo_get_global_gitconfig_author_name(repo);
632 			email = got_repo_get_global_gitconfig_author_email(
633 			    repo);
634 			if (name && email) {
635 				if (asprintf(author, "%s <%s>", name, email)
636 				    == -1)
637 					return got_error_from_errno("asprintf");
638 				return NULL;
639 			}
640 			/* TODO: Look up user in password database? */
641 			return got_error(GOT_ERR_COMMIT_NO_AUTHOR);
642 		}
643 	}
644 
645 	*author = strdup(got_author);
646 	if (*author == NULL)
647 		return got_error_from_errno("strdup");
648 
649 	/*
650 	 * Really dumb email address check; we're only doing this to
651 	 * avoid git's object parser breaking on commits we create.
652 	 */
653 	while (*got_author && *got_author != '<')
654 		got_author++;
655 	if (*got_author != '<') {
656 		err = got_error(GOT_ERR_COMMIT_NO_EMAIL);
657 		goto done;
658 	}
659 	while (*got_author && *got_author != '@')
660 		got_author++;
661 	if (*got_author != '@') {
662 		err = got_error(GOT_ERR_COMMIT_NO_EMAIL);
663 		goto done;
664 	}
665 	while (*got_author && *got_author != '>')
666 		got_author++;
667 	if (*got_author != '>')
668 		err = got_error(GOT_ERR_COMMIT_NO_EMAIL);
669 done:
670 	if (err) {
671 		free(*author);
672 		*author = NULL;
673 	}
674 	return err;
675 }
676 
677 static const struct got_error *
678 get_gitconfig_path(char **gitconfig_path)
679 {
680 	const char *homedir = getenv("HOME");
681 
682 	*gitconfig_path = NULL;
683 	if (homedir) {
684 		if (asprintf(gitconfig_path, "%s/.gitconfig", homedir) == -1)
685 			return got_error_from_errno("asprintf");
686 
687 	}
688 	return NULL;
689 }
690 
691 static const struct got_error *
692 cmd_import(int argc, char *argv[])
693 {
694 	const struct got_error *error = NULL;
695 	char *path_dir = NULL, *repo_path = NULL, *logmsg = NULL;
696 	char *gitconfig_path = NULL, *editor = NULL, *author = NULL;
697 	const char *branch_name = "main";
698 	char *refname = NULL, *id_str = NULL, *logmsg_path = NULL;
699 	struct got_repository *repo = NULL;
700 	struct got_reference *branch_ref = NULL, *head_ref = NULL;
701 	struct got_object_id *new_commit_id = NULL;
702 	int ch;
703 	struct got_pathlist_head ignores;
704 	struct got_pathlist_entry *pe;
705 	int preserve_logmsg = 0;
706 
707 	TAILQ_INIT(&ignores);
708 
709 	while ((ch = getopt(argc, argv, "b:m:r:I:")) != -1) {
710 		switch (ch) {
711 		case 'b':
712 			branch_name = optarg;
713 			break;
714 		case 'm':
715 			logmsg = strdup(optarg);
716 			if (logmsg == NULL) {
717 				error = got_error_from_errno("strdup");
718 				goto done;
719 			}
720 			break;
721 		case 'r':
722 			repo_path = realpath(optarg, NULL);
723 			if (repo_path == NULL) {
724 				error = got_error_from_errno2("realpath",
725 				    optarg);
726 				goto done;
727 			}
728 			break;
729 		case 'I':
730 			if (optarg[0] == '\0')
731 				break;
732 			error = got_pathlist_insert(&pe, &ignores, optarg,
733 			    NULL);
734 			if (error)
735 				goto done;
736 			break;
737 		default:
738 			usage_import();
739 			/* NOTREACHED */
740 		}
741 	}
742 
743 	argc -= optind;
744 	argv += optind;
745 
746 #ifndef PROFILE
747 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
748 	    "unveil",
749 	    NULL) == -1)
750 		err(1, "pledge");
751 #endif
752 	if (argc != 1)
753 		usage_import();
754 
755 	if (repo_path == NULL) {
756 		repo_path = getcwd(NULL, 0);
757 		if (repo_path == NULL)
758 			return got_error_from_errno("getcwd");
759 	}
760 	got_path_strip_trailing_slashes(repo_path);
761 	error = get_gitconfig_path(&gitconfig_path);
762 	if (error)
763 		goto done;
764 	error = got_repo_open(&repo, repo_path, gitconfig_path);
765 	if (error)
766 		goto done;
767 
768 	error = get_author(&author, repo, NULL);
769 	if (error)
770 		return error;
771 
772 	/*
773 	 * Don't let the user create a branch name with a leading '-'.
774 	 * While technically a valid reference name, this case is usually
775 	 * an unintended typo.
776 	 */
777 	if (branch_name[0] == '-')
778 		return got_error_path(branch_name, GOT_ERR_REF_NAME_MINUS);
779 
780 	if (asprintf(&refname, "refs/heads/%s", branch_name) == -1) {
781 		error = got_error_from_errno("asprintf");
782 		goto done;
783 	}
784 
785 	error = got_ref_open(&branch_ref, repo, refname, 0);
786 	if (error) {
787 		if (error->code != GOT_ERR_NOT_REF)
788 			goto done;
789 	} else {
790 		error = got_error_msg(GOT_ERR_BRANCH_EXISTS,
791 		    "import target branch already exists");
792 		goto done;
793 	}
794 
795 	path_dir = realpath(argv[0], NULL);
796 	if (path_dir == NULL) {
797 		error = got_error_from_errno2("realpath", argv[0]);
798 		goto done;
799 	}
800 	got_path_strip_trailing_slashes(path_dir);
801 
802 	/*
803 	 * unveil(2) traverses exec(2); if an editor is used we have
804 	 * to apply unveil after the log message has been written.
805 	 */
806 	if (logmsg == NULL || strlen(logmsg) == 0) {
807 		error = get_editor(&editor);
808 		if (error)
809 			goto done;
810 		free(logmsg);
811 		error = collect_import_msg(&logmsg, &logmsg_path, editor,
812 		    path_dir, refname);
813 		if (error) {
814 			if (error->code != GOT_ERR_COMMIT_MSG_EMPTY &&
815 			    logmsg_path != NULL)
816 				preserve_logmsg = 1;
817 			goto done;
818 		}
819 	}
820 
821 	if (unveil(path_dir, "r") != 0) {
822 		error = got_error_from_errno2("unveil", path_dir);
823 		if (logmsg_path)
824 			preserve_logmsg = 1;
825 		goto done;
826 	}
827 
828 	error = apply_unveil(got_repo_get_path(repo), 0, NULL);
829 	if (error) {
830 		if (logmsg_path)
831 			preserve_logmsg = 1;
832 		goto done;
833 	}
834 
835 	error = got_repo_import(&new_commit_id, path_dir, logmsg,
836 	    author, &ignores, repo, import_progress, NULL);
837 	if (error) {
838 		if (logmsg_path)
839 			preserve_logmsg = 1;
840 		goto done;
841 	}
842 
843 	error = got_ref_alloc(&branch_ref, refname, new_commit_id);
844 	if (error) {
845 		if (logmsg_path)
846 			preserve_logmsg = 1;
847 		goto done;
848 	}
849 
850 	error = got_ref_write(branch_ref, repo);
851 	if (error) {
852 		if (logmsg_path)
853 			preserve_logmsg = 1;
854 		goto done;
855 	}
856 
857 	error = got_object_id_str(&id_str, new_commit_id);
858 	if (error) {
859 		if (logmsg_path)
860 			preserve_logmsg = 1;
861 		goto done;
862 	}
863 
864 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0);
865 	if (error) {
866 		if (error->code != GOT_ERR_NOT_REF) {
867 			if (logmsg_path)
868 				preserve_logmsg = 1;
869 			goto done;
870 		}
871 
872 		error = got_ref_alloc_symref(&head_ref, GOT_REF_HEAD,
873 		    branch_ref);
874 		if (error) {
875 			if (logmsg_path)
876 				preserve_logmsg = 1;
877 			goto done;
878 		}
879 
880 		error = got_ref_write(head_ref, repo);
881 		if (error) {
882 			if (logmsg_path)
883 				preserve_logmsg = 1;
884 			goto done;
885 		}
886 	}
887 
888 	printf("Created branch %s with commit %s\n",
889 	    got_ref_get_name(branch_ref), id_str);
890 done:
891 	if (preserve_logmsg) {
892 		fprintf(stderr, "%s: log message preserved in %s\n",
893 		    getprogname(), logmsg_path);
894 	} else if (logmsg_path && unlink(logmsg_path) == -1 && error == NULL)
895 		error = got_error_from_errno2("unlink", logmsg_path);
896 	free(logmsg);
897 	free(logmsg_path);
898 	free(repo_path);
899 	free(editor);
900 	free(refname);
901 	free(new_commit_id);
902 	free(id_str);
903 	free(author);
904 	free(gitconfig_path);
905 	if (branch_ref)
906 		got_ref_close(branch_ref);
907 	if (head_ref)
908 		got_ref_close(head_ref);
909 	return error;
910 }
911 
912 __dead static void
913 usage_clone(void)
914 {
915 	fprintf(stderr, "usage: %s clone [-a] [-b branch] [-l] [-m] [-q] [-v] "
916 	    "[-R reference] repository-url [directory]\n", getprogname());
917 	exit(1);
918 }
919 
920 struct got_fetch_progress_arg {
921 	char last_scaled_size[FMT_SCALED_STRSIZE];
922 	int last_p_indexed;
923 	int last_p_resolved;
924 	int verbosity;
925 
926 	struct got_repository *repo;
927 
928 	int create_configs;
929 	int configs_created;
930 	struct {
931 		struct got_pathlist_head *symrefs;
932 		struct got_pathlist_head *wanted_branches;
933 		struct got_pathlist_head *wanted_refs;
934 		const char *proto;
935 		const char *host;
936 		const char *port;
937 		const char *remote_repo_path;
938 		const char *git_url;
939 		int fetch_all_branches;
940 		int mirror_references;
941 	} config_info;
942 };
943 
944 /* XXX forward declaration */
945 static const struct got_error *
946 create_config_files(const char *proto, const char *host, const char *port,
947     const char *remote_repo_path, const char *git_url, int fetch_all_branches,
948     int mirror_references, struct got_pathlist_head *symrefs,
949     struct got_pathlist_head *wanted_branches,
950     struct got_pathlist_head *wanted_refs, struct got_repository *repo);
951 
952 static const struct got_error *
953 fetch_progress(void *arg, const char *message, off_t packfile_size,
954     int nobj_total, int nobj_indexed, int nobj_loose, int nobj_resolved)
955 {
956 	const struct got_error *err = NULL;
957 	struct got_fetch_progress_arg *a = arg;
958 	char scaled_size[FMT_SCALED_STRSIZE];
959 	int p_indexed, p_resolved;
960 	int print_size = 0, print_indexed = 0, print_resolved = 0;
961 
962 	/*
963 	 * In order to allow a failed clone to be resumed with 'got fetch'
964 	 * we try to create configuration files as soon as possible.
965 	 * Once the server has sent information about its default branch
966 	 * we have all required information.
967 	 */
968 	if (a->create_configs && !a->configs_created &&
969 	    !TAILQ_EMPTY(a->config_info.symrefs)) {
970 		err = create_config_files(a->config_info.proto,
971 		    a->config_info.host, a->config_info.port,
972 		    a->config_info.remote_repo_path,
973 		    a->config_info.git_url,
974 		    a->config_info.fetch_all_branches,
975 		    a->config_info.mirror_references,
976 		    a->config_info.symrefs,
977 		    a->config_info.wanted_branches,
978 		    a->config_info.wanted_refs, a->repo);
979 		if (err)
980 			return err;
981 		a->configs_created = 1;
982 	}
983 
984 	if (a->verbosity < 0)
985 		return NULL;
986 
987 	if (message && message[0] != '\0') {
988 		printf("\rserver: %s", message);
989 		fflush(stdout);
990 		return NULL;
991 	}
992 
993 	if (packfile_size > 0 || nobj_indexed > 0) {
994 		if (fmt_scaled(packfile_size, scaled_size) == 0 &&
995 		    (a->last_scaled_size[0] == '\0' ||
996 		    strcmp(scaled_size, a->last_scaled_size)) != 0) {
997 			print_size = 1;
998 			if (strlcpy(a->last_scaled_size, scaled_size,
999 			    FMT_SCALED_STRSIZE) >= FMT_SCALED_STRSIZE)
1000 				return got_error(GOT_ERR_NO_SPACE);
1001 		}
1002 		if (nobj_indexed > 0) {
1003 			p_indexed = (nobj_indexed * 100) / nobj_total;
1004 			if (p_indexed != a->last_p_indexed) {
1005 				a->last_p_indexed = p_indexed;
1006 				print_indexed = 1;
1007 				print_size = 1;
1008 			}
1009 		}
1010 		if (nobj_resolved > 0) {
1011 			p_resolved = (nobj_resolved * 100) /
1012 			    (nobj_total - nobj_loose);
1013 			if (p_resolved != a->last_p_resolved) {
1014 				a->last_p_resolved = p_resolved;
1015 				print_resolved = 1;
1016 				print_indexed = 1;
1017 				print_size = 1;
1018 			}
1019 		}
1020 
1021 	}
1022 	if (print_size || print_indexed || print_resolved)
1023 		printf("\r");
1024 	if (print_size)
1025 		printf("%*s fetched", FMT_SCALED_STRSIZE, scaled_size);
1026 	if (print_indexed)
1027 		printf("; indexing %d%%", p_indexed);
1028 	if (print_resolved)
1029 		printf("; resolving deltas %d%%", p_resolved);
1030 	if (print_size || print_indexed || print_resolved)
1031 		fflush(stdout);
1032 
1033 	return NULL;
1034 }
1035 
1036 static const struct got_error *
1037 create_symref(const char *refname, struct got_reference *target_ref,
1038     int verbosity, struct got_repository *repo)
1039 {
1040 	const struct got_error *err;
1041 	struct got_reference *head_symref;
1042 
1043 	err = got_ref_alloc_symref(&head_symref, refname, target_ref);
1044 	if (err)
1045 		return err;
1046 
1047 	err = got_ref_write(head_symref, repo);
1048 	if (err == NULL && verbosity > 0) {
1049 		printf("Created reference %s: %s\n", GOT_REF_HEAD,
1050 		    got_ref_get_name(target_ref));
1051 	}
1052 	got_ref_close(head_symref);
1053 	return err;
1054 }
1055 
1056 static const struct got_error *
1057 list_remote_refs(struct got_pathlist_head *symrefs,
1058     struct got_pathlist_head *refs)
1059 {
1060 	const struct got_error *err;
1061 	struct got_pathlist_entry *pe;
1062 
1063 	TAILQ_FOREACH(pe, symrefs, entry) {
1064 		const char *refname = pe->path;
1065 		const char *targetref = pe->data;
1066 
1067 		printf("%s: %s\n", refname, targetref);
1068 	}
1069 
1070 	TAILQ_FOREACH(pe, refs, entry) {
1071 		const char *refname = pe->path;
1072 		struct got_object_id *id = pe->data;
1073 		char *id_str;
1074 
1075 		err = got_object_id_str(&id_str, id);
1076 		if (err)
1077 			return err;
1078 		printf("%s: %s\n", refname, id_str);
1079 		free(id_str);
1080 	}
1081 
1082 	return NULL;
1083 }
1084 
1085 static const struct got_error *
1086 create_ref(const char *refname, struct got_object_id *id,
1087     int verbosity, struct got_repository *repo)
1088 {
1089 	const struct got_error *err = NULL;
1090 	struct got_reference *ref;
1091 	char *id_str;
1092 
1093 	err = got_object_id_str(&id_str, id);
1094 	if (err)
1095 		return err;
1096 
1097 	err = got_ref_alloc(&ref, refname, id);
1098 	if (err)
1099 		goto done;
1100 
1101 	err = got_ref_write(ref, repo);
1102 	got_ref_close(ref);
1103 
1104 	if (err == NULL && verbosity >= 0)
1105 		printf("Created reference %s: %s\n", refname, id_str);
1106 done:
1107 	free(id_str);
1108 	return err;
1109 }
1110 
1111 static int
1112 match_wanted_ref(const char *refname, const char *wanted_ref)
1113 {
1114 	if (strncmp(refname, "refs/", 5) != 0)
1115 		return 0;
1116 	refname += 5;
1117 
1118 	/*
1119 	 * Prevent fetching of references that won't make any
1120 	 * sense outside of the remote repository's context.
1121 	 */
1122 	if (strncmp(refname, "got/", 4) == 0)
1123 		return 0;
1124 	if (strncmp(refname, "remotes/", 8) == 0)
1125 		return 0;
1126 
1127 	if (strncmp(wanted_ref, "refs/", 5) == 0)
1128 		wanted_ref += 5;
1129 
1130 	/* Allow prefix match. */
1131 	if (got_path_is_child(refname, wanted_ref, strlen(wanted_ref)))
1132 		return 1;
1133 
1134 	/* Allow exact match. */
1135 	return (strcmp(refname, wanted_ref) == 0);
1136 }
1137 
1138 static int
1139 is_wanted_ref(struct got_pathlist_head *wanted_refs, const char *refname)
1140 {
1141 	struct got_pathlist_entry *pe;
1142 
1143 	TAILQ_FOREACH(pe, wanted_refs, entry) {
1144 		if (match_wanted_ref(refname, pe->path))
1145 			return 1;
1146 	}
1147 
1148 	return 0;
1149 }
1150 
1151 static const struct got_error *
1152 create_wanted_ref(const char *refname, struct got_object_id *id,
1153     const char *remote_repo_name, int verbosity, struct got_repository *repo)
1154 {
1155 	const struct got_error *err;
1156 	char *remote_refname;
1157 
1158 	if (strncmp("refs/", refname, 5) == 0)
1159 		refname += 5;
1160 
1161 	if (asprintf(&remote_refname, "refs/remotes/%s/%s",
1162 	    remote_repo_name, refname) == -1)
1163 		return got_error_from_errno("asprintf");
1164 
1165 	err = create_ref(remote_refname, id, verbosity, repo);
1166 	free(remote_refname);
1167 	return err;
1168 }
1169 
1170 static const struct got_error *
1171 create_gotconfig(const char *proto, const char *host, const char *port,
1172     const char *remote_repo_path, const char *default_branch,
1173     int fetch_all_branches, struct got_pathlist_head *wanted_branches,
1174     struct got_pathlist_head *wanted_refs, int mirror_references,
1175     struct got_repository *repo)
1176 {
1177 	const struct got_error *err = NULL;
1178 	char *gotconfig_path = NULL;
1179 	char *gotconfig = NULL;
1180 	FILE *gotconfig_file = NULL;
1181 	const char *branchname = NULL;
1182 	char *branches = NULL, *refs = NULL;
1183 	ssize_t n;
1184 
1185 	if (!fetch_all_branches && !TAILQ_EMPTY(wanted_branches)) {
1186 		struct got_pathlist_entry *pe;
1187 		TAILQ_FOREACH(pe, wanted_branches, entry) {
1188 			char *s;
1189 			branchname = pe->path;
1190 			if (strncmp(branchname, "refs/heads/", 11) == 0)
1191 				branchname += 11;
1192 			if (asprintf(&s, "%s\"%s\" ",
1193 			    branches ? branches : "", branchname) == -1) {
1194 				err = got_error_from_errno("asprintf");
1195 				goto done;
1196 			}
1197 			free(branches);
1198 			branches = s;
1199 		}
1200 	} else if (!fetch_all_branches && default_branch) {
1201 		branchname = default_branch;
1202 		if (strncmp(branchname, "refs/heads/", 11) == 0)
1203 			branchname += 11;
1204 		if (asprintf(&branches, "\"%s\" ", branchname) == -1) {
1205 			err = got_error_from_errno("asprintf");
1206 			goto done;
1207 		}
1208 	}
1209 	if (!TAILQ_EMPTY(wanted_refs)) {
1210 		struct got_pathlist_entry *pe;
1211 		TAILQ_FOREACH(pe, wanted_refs, entry) {
1212 			char *s;
1213 			const char *refname = pe->path;
1214 			if (strncmp(refname, "refs/", 5) == 0)
1215 				branchname += 5;
1216 			if (asprintf(&s, "%s\"%s\" ",
1217 			    refs ? refs : "", refname) == -1) {
1218 				err = got_error_from_errno("asprintf");
1219 				goto done;
1220 			}
1221 			free(refs);
1222 			refs = s;
1223 		}
1224 	}
1225 
1226 	/* Create got.conf(5). */
1227 	gotconfig_path = got_repo_get_path_gotconfig(repo);
1228 	if (gotconfig_path == NULL) {
1229 		err = got_error_from_errno("got_repo_get_path_gotconfig");
1230 		goto done;
1231 	}
1232 	gotconfig_file = fopen(gotconfig_path, "a");
1233 	if (gotconfig_file == NULL) {
1234 		err = got_error_from_errno2("fopen", gotconfig_path);
1235 		goto done;
1236 	}
1237 	if (asprintf(&gotconfig,
1238 	    "remote \"%s\" {\n"
1239 	    "\tserver %s\n"
1240 	    "\tprotocol %s\n"
1241 	    "%s%s%s"
1242 	    "\trepository \"%s\"\n"
1243 	    "%s%s%s"
1244 	    "%s%s%s"
1245 	    "%s"
1246 	    "%s"
1247 	    "}\n",
1248 	    GOT_FETCH_DEFAULT_REMOTE_NAME, host, proto,
1249 	    port ? "\tport " : "", port ? port : "", port ? "\n" : "",
1250 	    remote_repo_path, branches ? "\tbranch { " : "",
1251 	    branches ? branches : "", branches ? "}\n" : "", 
1252 	    refs ? "\treference { " : "", refs ? refs : "", refs ? "}\n" : "", 
1253 	    mirror_references ? "\tmirror-references yes\n" : "",
1254 	    fetch_all_branches ? "\tfetch-all-branches yes\n" : "") == -1) {
1255 		err = got_error_from_errno("asprintf");
1256 		goto done;
1257 	}
1258 	n = fwrite(gotconfig, 1, strlen(gotconfig), gotconfig_file);
1259 	if (n != strlen(gotconfig)) {
1260 		err = got_ferror(gotconfig_file, GOT_ERR_IO);
1261 		goto done;
1262 	}
1263 
1264 done:
1265 	if (gotconfig_file && fclose(gotconfig_file) == EOF && err == NULL)
1266 		err = got_error_from_errno2("fclose", gotconfig_path);
1267 	free(gotconfig_path);
1268 	free(branches);
1269 	return err;
1270 }
1271 
1272 static const struct got_error *
1273 create_gitconfig(const char *git_url, const char *default_branch,
1274     int fetch_all_branches, struct got_pathlist_head *wanted_branches,
1275     struct got_pathlist_head *wanted_refs, int mirror_references,
1276     struct got_repository *repo)
1277 {
1278 	const struct got_error *err = NULL;
1279 	char *gitconfig_path = NULL;
1280 	char *gitconfig = NULL;
1281 	FILE *gitconfig_file = NULL;
1282 	char *branches = NULL, *refs = NULL;
1283 	const char *branchname;
1284 	ssize_t n;
1285 
1286 	/* Create a config file Git can understand. */
1287 	gitconfig_path = got_repo_get_path_gitconfig(repo);
1288 	if (gitconfig_path == NULL) {
1289 		err = got_error_from_errno("got_repo_get_path_gitconfig");
1290 		goto done;
1291 	}
1292 	gitconfig_file = fopen(gitconfig_path, "a");
1293 	if (gitconfig_file == NULL) {
1294 		err = got_error_from_errno2("fopen", gitconfig_path);
1295 		goto done;
1296 	}
1297 	if (fetch_all_branches) {
1298 		if (mirror_references) {
1299 			if (asprintf(&branches,
1300 			    "\tfetch = refs/heads/*:refs/heads/*\n") == -1) {
1301 				err = got_error_from_errno("asprintf");
1302 				goto done;
1303 			}
1304 		} else if (asprintf(&branches,
1305 		    "\tfetch = refs/heads/*:refs/remotes/%s/*\n",
1306 		    GOT_FETCH_DEFAULT_REMOTE_NAME) == -1) {
1307 			err = got_error_from_errno("asprintf");
1308 			goto done;
1309 		}
1310 	} else if (!TAILQ_EMPTY(wanted_branches)) {
1311 		struct got_pathlist_entry *pe;
1312 		TAILQ_FOREACH(pe, wanted_branches, entry) {
1313 			char *s;
1314 			branchname = pe->path;
1315 			if (strncmp(branchname, "refs/heads/", 11) == 0)
1316 				branchname += 11;
1317 			if (mirror_references) {
1318 				if (asprintf(&s,
1319 				    "%s\tfetch = refs/heads/%s:refs/heads/%s\n",
1320 				    branches ? branches : "",
1321 				    branchname, branchname) == -1) {
1322 					err = got_error_from_errno("asprintf");
1323 					goto done;
1324 				}
1325 			} else if (asprintf(&s,
1326 			    "%s\tfetch = refs/heads/%s:refs/remotes/%s/%s\n",
1327 			    branches ? branches : "",
1328 			    branchname, GOT_FETCH_DEFAULT_REMOTE_NAME,
1329 			    branchname) == -1) {
1330 				err = got_error_from_errno("asprintf");
1331 				goto done;
1332 			}
1333 			free(branches);
1334 			branches = s;
1335 		}
1336 	} else {
1337 		/*
1338 		 * If the server specified a default branch, use just that one.
1339 		 * Otherwise fall back to fetching all branches on next fetch.
1340 		 */
1341 		if (default_branch) {
1342 			branchname = default_branch;
1343 			if (strncmp(branchname, "refs/heads/", 11) == 0)
1344 				branchname += 11;
1345 		} else
1346 			branchname = "*"; /* fall back to all branches */
1347 		if (mirror_references) {
1348 			if (asprintf(&branches,
1349 			    "\tfetch = refs/heads/%s:refs/heads/%s\n",
1350 			    branchname, branchname) == -1) {
1351 				err = got_error_from_errno("asprintf");
1352 				goto done;
1353 			}
1354 		} else if (asprintf(&branches,
1355 		    "\tfetch = refs/heads/%s:refs/remotes/%s/%s\n",
1356 		    branchname, GOT_FETCH_DEFAULT_REMOTE_NAME,
1357 		    branchname) == -1) {
1358 			err = got_error_from_errno("asprintf");
1359 			goto done;
1360 		}
1361 	}
1362 	if (!TAILQ_EMPTY(wanted_refs)) {
1363 		struct got_pathlist_entry *pe;
1364 		TAILQ_FOREACH(pe, wanted_refs, entry) {
1365 			char *s;
1366 			const char *refname = pe->path;
1367 			if (strncmp(refname, "refs/", 5) == 0)
1368 				refname += 5;
1369 			if (mirror_references) {
1370 				if (asprintf(&s,
1371 				    "%s\tfetch = refs/%s:refs/%s\n",
1372 				    refs ? refs : "", refname, refname) == -1) {
1373 					err = got_error_from_errno("asprintf");
1374 					goto done;
1375 				}
1376 			} else if (asprintf(&s,
1377 			    "%s\tfetch = refs/%s:refs/remotes/%s/%s\n",
1378 			    refs ? refs : "",
1379 			    refname, GOT_FETCH_DEFAULT_REMOTE_NAME,
1380 			    refname) == -1) {
1381 				err = got_error_from_errno("asprintf");
1382 				goto done;
1383 			}
1384 			free(refs);
1385 			refs = s;
1386 		}
1387 	}
1388 
1389 	if (asprintf(&gitconfig,
1390 	    "[remote \"%s\"]\n"
1391 	    "\turl = %s\n"
1392 	    "%s"
1393 	    "%s"
1394 	    "\tfetch = refs/tags/*:refs/tags/*\n",
1395 	    GOT_FETCH_DEFAULT_REMOTE_NAME, git_url, branches ? branches : "",
1396 	    refs ? refs : "") == -1) {
1397 		err = got_error_from_errno("asprintf");
1398 		goto done;
1399 	}
1400 	n = fwrite(gitconfig, 1, strlen(gitconfig), gitconfig_file);
1401 	if (n != strlen(gitconfig)) {
1402 		err = got_ferror(gitconfig_file, GOT_ERR_IO);
1403 		goto done;
1404 	}
1405 done:
1406 	if (gitconfig_file && fclose(gitconfig_file) == EOF && err == NULL)
1407 		err = got_error_from_errno2("fclose", gitconfig_path);
1408 	free(gitconfig_path);
1409 	free(branches);
1410 	return err;
1411 }
1412 
1413 static const struct got_error *
1414 create_config_files(const char *proto, const char *host, const char *port,
1415     const char *remote_repo_path, const char *git_url, int fetch_all_branches,
1416     int mirror_references, struct got_pathlist_head *symrefs,
1417     struct got_pathlist_head *wanted_branches,
1418     struct got_pathlist_head *wanted_refs, struct got_repository *repo)
1419 {
1420 	const struct got_error *err = NULL;
1421 	const char *default_branch = NULL;
1422 	struct got_pathlist_entry *pe;
1423 
1424 	/*
1425 	 * If we asked for a set of wanted branches then use the first
1426 	 * one of those.
1427 	 */
1428 	if (!TAILQ_EMPTY(wanted_branches)) {
1429 		pe = TAILQ_FIRST(wanted_branches);
1430 		default_branch = pe->path;
1431 	} else {
1432 		/* First HEAD ref listed by server is the default branch. */
1433 		TAILQ_FOREACH(pe, symrefs, entry) {
1434 			const char *refname = pe->path;
1435 			const char *target = pe->data;
1436 
1437 			if (strcmp(refname, GOT_REF_HEAD) != 0)
1438 				continue;
1439 
1440 			default_branch = target;
1441 			break;
1442 		}
1443 	}
1444 
1445 	/* Create got.conf(5). */
1446 	err = create_gotconfig(proto, host, port, remote_repo_path,
1447 	    default_branch, fetch_all_branches, wanted_branches,
1448 	    wanted_refs, mirror_references, repo);
1449 	if (err)
1450 		return err;
1451 
1452 	/* Create a config file Git can understand. */
1453 	return create_gitconfig(git_url, default_branch, fetch_all_branches,
1454 	    wanted_branches, wanted_refs, mirror_references, repo);
1455 }
1456 
1457 static const struct got_error *
1458 cmd_clone(int argc, char *argv[])
1459 {
1460 	const struct got_error *error = NULL;
1461 	const char *uri, *dirname;
1462 	char *proto, *host, *port, *repo_name, *server_path;
1463 	char *default_destdir = NULL, *id_str = NULL;
1464 	const char *repo_path;
1465 	struct got_repository *repo = NULL;
1466 	struct got_pathlist_head refs, symrefs, wanted_branches, wanted_refs;
1467 	struct got_pathlist_entry *pe;
1468 	struct got_object_id *pack_hash = NULL;
1469 	int ch, fetchfd = -1, fetchstatus;
1470 	pid_t fetchpid = -1;
1471 	struct got_fetch_progress_arg fpa;
1472 	char *git_url = NULL;
1473 	int verbosity = 0, fetch_all_branches = 0, mirror_references = 0;
1474 	int list_refs_only = 0;
1475 
1476 	TAILQ_INIT(&refs);
1477 	TAILQ_INIT(&symrefs);
1478 	TAILQ_INIT(&wanted_branches);
1479 	TAILQ_INIT(&wanted_refs);
1480 
1481 	while ((ch = getopt(argc, argv, "ab:lmvqR:")) != -1) {
1482 		switch (ch) {
1483 		case 'a':
1484 			fetch_all_branches = 1;
1485 			break;
1486 		case 'b':
1487 			error = got_pathlist_append(&wanted_branches,
1488 			    optarg, NULL);
1489 			if (error)
1490 				return error;
1491 			break;
1492 		case 'l':
1493 			list_refs_only = 1;
1494 			break;
1495 		case 'm':
1496 			mirror_references = 1;
1497 			break;
1498 		case 'v':
1499 			if (verbosity < 0)
1500 				verbosity = 0;
1501 			else if (verbosity < 3)
1502 				verbosity++;
1503 			break;
1504 		case 'q':
1505 			verbosity = -1;
1506 			break;
1507 		case 'R':
1508 			error = got_pathlist_append(&wanted_refs,
1509 			    optarg, NULL);
1510 			if (error)
1511 				return error;
1512 			break;
1513 		default:
1514 			usage_clone();
1515 			break;
1516 		}
1517 	}
1518 	argc -= optind;
1519 	argv += optind;
1520 
1521 	if (fetch_all_branches && !TAILQ_EMPTY(&wanted_branches))
1522 		option_conflict('a', 'b');
1523 	if (list_refs_only) {
1524 		if (!TAILQ_EMPTY(&wanted_branches))
1525 			option_conflict('l', 'b');
1526 		if (fetch_all_branches)
1527 			option_conflict('l', 'a');
1528 		if (mirror_references)
1529 			option_conflict('l', 'm');
1530 		if (!TAILQ_EMPTY(&wanted_refs))
1531 			option_conflict('l', 'R');
1532 	}
1533 
1534 	uri = argv[0];
1535 
1536 	if (argc == 1)
1537 		dirname = NULL;
1538 	else if (argc == 2)
1539 		dirname = argv[1];
1540 	else
1541 		usage_clone();
1542 
1543 	error = got_fetch_parse_uri(&proto, &host, &port, &server_path,
1544 	    &repo_name, uri);
1545 	if (error)
1546 		goto done;
1547 
1548 	if (asprintf(&git_url, "%s://%s%s%s%s%s", proto,
1549 	    host, port ? ":" : "", port ? port : "",
1550 	    server_path[0] != '/' ? "/" : "", server_path) == -1) {
1551 		error = got_error_from_errno("asprintf");
1552 		goto done;
1553 	}
1554 
1555 	if (strcmp(proto, "git") == 0) {
1556 #ifndef PROFILE
1557 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
1558 		    "sendfd dns inet unveil", NULL) == -1)
1559 			err(1, "pledge");
1560 #endif
1561 	} else if (strcmp(proto, "git+ssh") == 0 ||
1562 	    strcmp(proto, "ssh") == 0) {
1563 #ifndef PROFILE
1564 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
1565 		    "sendfd unveil", NULL) == -1)
1566 			err(1, "pledge");
1567 #endif
1568 	} else if (strcmp(proto, "http") == 0 ||
1569 	    strcmp(proto, "git+http") == 0) {
1570 		error = got_error_path(proto, GOT_ERR_NOT_IMPL);
1571 		goto done;
1572 	} else {
1573 		error = got_error_path(proto, GOT_ERR_BAD_PROTO);
1574 		goto done;
1575 	}
1576 	if (dirname == NULL) {
1577 		if (asprintf(&default_destdir, "%s.git", repo_name) == -1) {
1578 			error = got_error_from_errno("asprintf");
1579 			goto done;
1580 		}
1581 		repo_path = default_destdir;
1582 	} else
1583 		repo_path = dirname;
1584 
1585 	if (!list_refs_only) {
1586 		error = got_path_mkdir(repo_path);
1587 		if (error &&
1588 		    (!(error->code == GOT_ERR_ERRNO && errno == EISDIR) &&
1589 		    !(error->code == GOT_ERR_ERRNO && errno == EEXIST)))
1590 			goto done;
1591 		if (!got_path_dir_is_empty(repo_path)) {
1592 			error = got_error_path(repo_path,
1593 			    GOT_ERR_DIR_NOT_EMPTY);
1594 			goto done;
1595 		}
1596 	}
1597 
1598 	if (strcmp(proto, "git+ssh") == 0 || strcmp(proto, "ssh") == 0) {
1599 		if (unveil(GOT_FETCH_PATH_SSH, "x") != 0) {
1600 			error = got_error_from_errno2("unveil",
1601 			    GOT_FETCH_PATH_SSH);
1602 			goto done;
1603 		}
1604 	}
1605 	error = apply_unveil(repo_path, 0, NULL);
1606 	if (error)
1607 		goto done;
1608 
1609 	if (verbosity >= 0)
1610 		printf("Connecting to %s%s%s\n", host,
1611 		    port ? ":" : "", port ? port : "");
1612 
1613 	error = got_fetch_connect(&fetchpid, &fetchfd, proto, host, port,
1614 	    server_path, verbosity);
1615 	if (error)
1616 		goto done;
1617 
1618 	if (!list_refs_only) {
1619 		error = got_repo_init(repo_path);
1620 		if (error)
1621 			goto done;
1622 		error = got_repo_open(&repo, repo_path, NULL);
1623 		if (error)
1624 			goto done;
1625 	}
1626 
1627 	fpa.last_scaled_size[0] = '\0';
1628 	fpa.last_p_indexed = -1;
1629 	fpa.last_p_resolved = -1;
1630 	fpa.verbosity = verbosity;
1631 	fpa.create_configs = 1;
1632 	fpa.configs_created = 0;
1633 	fpa.repo = repo;
1634 	fpa.config_info.symrefs = &symrefs;
1635 	fpa.config_info.wanted_branches = &wanted_branches;
1636 	fpa.config_info.wanted_refs = &wanted_refs;
1637 	fpa.config_info.proto = proto;
1638 	fpa.config_info.host = host;
1639 	fpa.config_info.port = port;
1640 	fpa.config_info.remote_repo_path = server_path;
1641 	fpa.config_info.git_url = git_url;
1642 	fpa.config_info.fetch_all_branches = fetch_all_branches;
1643 	fpa.config_info.mirror_references = mirror_references;
1644 	error = got_fetch_pack(&pack_hash, &refs, &symrefs,
1645 	    GOT_FETCH_DEFAULT_REMOTE_NAME, mirror_references,
1646 	    fetch_all_branches, &wanted_branches, &wanted_refs,
1647 	    list_refs_only, verbosity, fetchfd, repo,
1648 	    fetch_progress, &fpa);
1649 	if (error)
1650 		goto done;
1651 
1652 	if (list_refs_only) {
1653 		error = list_remote_refs(&symrefs, &refs);
1654 		goto done;
1655 	}
1656 
1657 	error = got_object_id_str(&id_str, pack_hash);
1658 	if (error)
1659 		goto done;
1660 	if (verbosity >= 0)
1661 		printf("\nFetched %s.pack\n", id_str);
1662 	free(id_str);
1663 
1664 	/* Set up references provided with the pack file. */
1665 	TAILQ_FOREACH(pe, &refs, entry) {
1666 		const char *refname = pe->path;
1667 		struct got_object_id *id = pe->data;
1668 		char *remote_refname;
1669 
1670 		if (is_wanted_ref(&wanted_refs, refname) &&
1671 		    !mirror_references) {
1672 			error = create_wanted_ref(refname, id,
1673 			    GOT_FETCH_DEFAULT_REMOTE_NAME,
1674 			    verbosity - 1, repo);
1675 			if (error)
1676 				goto done;
1677 			continue;
1678 		}
1679 
1680 		error = create_ref(refname, id, verbosity - 1, repo);
1681 		if (error)
1682 			goto done;
1683 
1684 		if (mirror_references)
1685 			continue;
1686 
1687 		if (strncmp("refs/heads/", refname, 11) != 0)
1688 			continue;
1689 
1690 		if (asprintf(&remote_refname,
1691 		    "refs/remotes/%s/%s", GOT_FETCH_DEFAULT_REMOTE_NAME,
1692 		    refname + 11) == -1) {
1693 			error = got_error_from_errno("asprintf");
1694 			goto done;
1695 		}
1696 		error = create_ref(remote_refname, id, verbosity - 1, repo);
1697 		free(remote_refname);
1698 		if (error)
1699 			goto done;
1700 	}
1701 
1702 	/* Set the HEAD reference if the server provided one. */
1703 	TAILQ_FOREACH(pe, &symrefs, entry) {
1704 		struct got_reference *target_ref;
1705 		const char *refname = pe->path;
1706 		const char *target = pe->data;
1707 		char *remote_refname = NULL, *remote_target = NULL;
1708 
1709 		if (strcmp(refname, GOT_REF_HEAD) != 0)
1710 			continue;
1711 
1712 		error = got_ref_open(&target_ref, repo, target, 0);
1713 		if (error) {
1714 			if (error->code == GOT_ERR_NOT_REF) {
1715 				error = NULL;
1716 				continue;
1717 			}
1718 			goto done;
1719 		}
1720 
1721 		error = create_symref(refname, target_ref, verbosity, repo);
1722 		got_ref_close(target_ref);
1723 		if (error)
1724 			goto done;
1725 
1726 		if (mirror_references)
1727 			continue;
1728 
1729 		if (strncmp("refs/heads/", target, 11) != 0)
1730 			continue;
1731 
1732 		if (asprintf(&remote_refname,
1733 		    "refs/remotes/%s/%s", GOT_FETCH_DEFAULT_REMOTE_NAME,
1734 		    refname) == -1) {
1735 			error = got_error_from_errno("asprintf");
1736 			goto done;
1737 		}
1738 		if (asprintf(&remote_target,
1739 		    "refs/remotes/%s/%s", GOT_FETCH_DEFAULT_REMOTE_NAME,
1740 		    target + 11) == -1) {
1741 			error = got_error_from_errno("asprintf");
1742 			free(remote_refname);
1743 			goto done;
1744 		}
1745 		error = got_ref_open(&target_ref, repo, remote_target, 0);
1746 		if (error) {
1747 			free(remote_refname);
1748 			free(remote_target);
1749 			if (error->code == GOT_ERR_NOT_REF) {
1750 				error = NULL;
1751 				continue;
1752 			}
1753 			goto done;
1754 		}
1755 		error = create_symref(remote_refname, target_ref,
1756 		    verbosity - 1, repo);
1757 		free(remote_refname);
1758 		free(remote_target);
1759 		got_ref_close(target_ref);
1760 		if (error)
1761 			goto done;
1762 	}
1763 	if (pe == NULL) {
1764 		/*
1765 		 * We failed to set the HEAD reference. If we asked for
1766 		 * a set of wanted branches use the first of one of those
1767 		 * which could be fetched instead.
1768 		 */
1769 		TAILQ_FOREACH(pe, &wanted_branches, entry) {
1770 			const char *target = pe->path;
1771 			struct got_reference *target_ref;
1772 
1773 			error = got_ref_open(&target_ref, repo, target, 0);
1774 			if (error) {
1775 				if (error->code == GOT_ERR_NOT_REF) {
1776 					error = NULL;
1777 					continue;
1778 				}
1779 				goto done;
1780 			}
1781 
1782 			error = create_symref(GOT_REF_HEAD, target_ref,
1783 			    verbosity, repo);
1784 			got_ref_close(target_ref);
1785 			if (error)
1786 				goto done;
1787 			break;
1788 		}
1789 	}
1790 
1791 	if (verbosity >= 0)
1792 		printf("Created %s repository '%s'\n",
1793 		    mirror_references ? "mirrored" : "cloned", repo_path);
1794 done:
1795 	if (fetchpid > 0) {
1796 		if (kill(fetchpid, SIGTERM) == -1)
1797 			error = got_error_from_errno("kill");
1798 		if (waitpid(fetchpid, &fetchstatus, 0) == -1 && error == NULL)
1799 			error = got_error_from_errno("waitpid");
1800 	}
1801 	if (fetchfd != -1 && close(fetchfd) == -1 && error == NULL)
1802 		error = got_error_from_errno("close");
1803 	if (repo)
1804 		got_repo_close(repo);
1805 	TAILQ_FOREACH(pe, &refs, entry) {
1806 		free((void *)pe->path);
1807 		free(pe->data);
1808 	}
1809 	got_pathlist_free(&refs);
1810 	TAILQ_FOREACH(pe, &symrefs, entry) {
1811 		free((void *)pe->path);
1812 		free(pe->data);
1813 	}
1814 	got_pathlist_free(&symrefs);
1815 	got_pathlist_free(&wanted_branches);
1816 	got_pathlist_free(&wanted_refs);
1817 	free(pack_hash);
1818 	free(proto);
1819 	free(host);
1820 	free(port);
1821 	free(server_path);
1822 	free(repo_name);
1823 	free(default_destdir);
1824 	free(git_url);
1825 	return error;
1826 }
1827 
1828 static const struct got_error *
1829 update_ref(struct got_reference *ref, struct got_object_id *new_id,
1830     int replace_tags, int verbosity, struct got_repository *repo)
1831 {
1832 	const struct got_error *err = NULL;
1833 	char *new_id_str = NULL;
1834 	struct got_object_id *old_id = NULL;
1835 
1836 	err = got_object_id_str(&new_id_str, new_id);
1837 	if (err)
1838 		goto done;
1839 
1840 	if (!replace_tags &&
1841 	    strncmp(got_ref_get_name(ref), "refs/tags/", 10) == 0) {
1842 		err = got_ref_resolve(&old_id, repo, ref);
1843 		if (err)
1844 			goto done;
1845 		if (got_object_id_cmp(old_id, new_id) == 0)
1846 			goto done;
1847 		if (verbosity >= 0) {
1848 			printf("Rejecting update of existing tag %s: %s\n",
1849 			    got_ref_get_name(ref), new_id_str);
1850 		}
1851 		goto done;
1852 	}
1853 
1854 	if (got_ref_is_symbolic(ref)) {
1855 		if (verbosity >= 0) {
1856 			printf("Replacing reference %s: %s\n",
1857 			    got_ref_get_name(ref),
1858 			    got_ref_get_symref_target(ref));
1859 		}
1860 		err = got_ref_change_symref_to_ref(ref, new_id);
1861 		if (err)
1862 			goto done;
1863 		err = got_ref_write(ref, repo);
1864 		if (err)
1865 			goto done;
1866 	} else {
1867 		err = got_ref_resolve(&old_id, repo, ref);
1868 		if (err)
1869 			goto done;
1870 		if (got_object_id_cmp(old_id, new_id) == 0)
1871 			goto done;
1872 
1873 		err = got_ref_change_ref(ref, new_id);
1874 		if (err)
1875 			goto done;
1876 		err = got_ref_write(ref, repo);
1877 		if (err)
1878 			goto done;
1879 	}
1880 
1881 	if (verbosity >= 0)
1882 		printf("Updated %s: %s\n", got_ref_get_name(ref),
1883 		    new_id_str);
1884 done:
1885 	free(old_id);
1886 	free(new_id_str);
1887 	return err;
1888 }
1889 
1890 static const struct got_error *
1891 update_symref(const char *refname, struct got_reference *target_ref,
1892     int verbosity, struct got_repository *repo)
1893 {
1894 	const struct got_error *err = NULL, *unlock_err;
1895 	struct got_reference *symref;
1896 	int symref_is_locked = 0;
1897 
1898 	err = got_ref_open(&symref, repo, refname, 1);
1899 	if (err) {
1900 		if (err->code != GOT_ERR_NOT_REF)
1901 			return err;
1902 		err = got_ref_alloc_symref(&symref, refname, target_ref);
1903 		if (err)
1904 			goto done;
1905 
1906 		err = got_ref_write(symref, repo);
1907 		if (err)
1908 			goto done;
1909 
1910 		if (verbosity >= 0)
1911 			printf("Created reference %s: %s\n",
1912 			    got_ref_get_name(symref),
1913 			    got_ref_get_symref_target(symref));
1914 	} else {
1915 		symref_is_locked = 1;
1916 
1917 		if (strcmp(got_ref_get_symref_target(symref),
1918 		    got_ref_get_name(target_ref)) == 0)
1919 			goto done;
1920 
1921 		err = got_ref_change_symref(symref,
1922 		    got_ref_get_name(target_ref));
1923 		if (err)
1924 			goto done;
1925 
1926 		err = got_ref_write(symref, repo);
1927 		if (err)
1928 			goto done;
1929 
1930 		if (verbosity >= 0)
1931 			printf("Updated %s: %s\n", got_ref_get_name(symref),
1932 			    got_ref_get_symref_target(symref));
1933 
1934 	}
1935 done:
1936 	if (symref_is_locked) {
1937 		unlock_err = got_ref_unlock(symref);
1938 		if (unlock_err && err == NULL)
1939 			err = unlock_err;
1940 	}
1941 	got_ref_close(symref);
1942 	return err;
1943 }
1944 
1945 __dead static void
1946 usage_fetch(void)
1947 {
1948 	fprintf(stderr, "usage: %s fetch [-a] [-b branch] [-d] [-l] "
1949 	    "[-r repository-path] [-t] [-q] [-v] [-R reference] "
1950 	    "[remote-repository-name]\n",
1951 	    getprogname());
1952 	exit(1);
1953 }
1954 
1955 static const struct got_error *
1956 delete_missing_ref(struct got_reference *ref,
1957     int verbosity, struct got_repository *repo)
1958 {
1959 	const struct got_error *err = NULL;
1960 	struct got_object_id *id = NULL;
1961 	char *id_str = NULL;
1962 
1963 	if (got_ref_is_symbolic(ref)) {
1964 		err = got_ref_delete(ref, repo);
1965 		if (err)
1966 			return err;
1967 		if (verbosity >= 0) {
1968 			printf("Deleted reference %s: %s\n",
1969 			    got_ref_get_name(ref),
1970 			    got_ref_get_symref_target(ref));
1971 		}
1972 	} else {
1973 		err = got_ref_resolve(&id, repo, ref);
1974 		if (err)
1975 			return err;
1976 		err = got_object_id_str(&id_str, id);
1977 		if (err)
1978 			goto done;
1979 
1980 		err = got_ref_delete(ref, repo);
1981 		if (err)
1982 			goto done;
1983 		if (verbosity >= 0) {
1984 			printf("Deleted reference %s: %s\n",
1985 			    got_ref_get_name(ref), id_str);
1986 		}
1987 	}
1988 done:
1989 	free(id);
1990 	free(id_str);
1991 	return NULL;
1992 }
1993 
1994 static const struct got_error *
1995 delete_missing_refs(struct got_pathlist_head *their_refs,
1996     struct got_pathlist_head *their_symrefs,
1997     const struct got_remote_repo *remote,
1998     int verbosity, struct got_repository *repo)
1999 {
2000 	const struct got_error *err = NULL, *unlock_err;
2001 	struct got_reflist_head my_refs;
2002 	struct got_reflist_entry *re;
2003 	struct got_pathlist_entry *pe;
2004 	char *remote_namespace = NULL;
2005 	char *local_refname = NULL;
2006 
2007 	TAILQ_INIT(&my_refs);
2008 
2009 	if (asprintf(&remote_namespace, "refs/remotes/%s/", remote->name)
2010 	    == -1)
2011 		return got_error_from_errno("asprintf");
2012 
2013 	err = got_ref_list(&my_refs, repo, NULL, got_ref_cmp_by_name, NULL);
2014 	if (err)
2015 		goto done;
2016 
2017 	TAILQ_FOREACH(re, &my_refs, entry) {
2018 		const char *refname = got_ref_get_name(re->ref);
2019 
2020 		if (!remote->mirror_references) {
2021 			if (strncmp(refname, remote_namespace,
2022 			    strlen(remote_namespace)) == 0) {
2023 				if (strcmp(refname + strlen(remote_namespace),
2024 				    GOT_REF_HEAD) == 0)
2025 					continue;
2026 				if (asprintf(&local_refname, "refs/heads/%s",
2027 				    refname + strlen(remote_namespace)) == -1) {
2028 					err = got_error_from_errno("asprintf");
2029 					goto done;
2030 				}
2031 			} else if (strncmp(refname, "refs/tags/", 10) != 0)
2032 				continue;
2033 		}
2034 
2035 		TAILQ_FOREACH(pe, their_refs, entry) {
2036 			if (strcmp(local_refname, pe->path) == 0)
2037 				break;
2038 		}
2039 		if (pe != NULL)
2040 			continue;
2041 
2042 		TAILQ_FOREACH(pe, their_symrefs, entry) {
2043 			if (strcmp(local_refname, pe->path) == 0)
2044 				break;
2045 		}
2046 		if (pe != NULL)
2047 			continue;
2048 
2049 		err = delete_missing_ref(re->ref, verbosity, repo);
2050 		if (err)
2051 			break;
2052 
2053 		if (local_refname) {
2054 			struct got_reference *ref;
2055 			err = got_ref_open(&ref, repo, local_refname, 1);
2056 			if (err) {
2057 				if (err->code != GOT_ERR_NOT_REF)
2058 					break;
2059 				free(local_refname);
2060 				local_refname = NULL;
2061 				continue;
2062 			}
2063 			err = delete_missing_ref(ref, verbosity, repo);
2064 			if (err)
2065 				break;
2066 			unlock_err = got_ref_unlock(ref);
2067 			got_ref_close(ref);
2068 			if (unlock_err && err == NULL) {
2069 				err = unlock_err;
2070 				break;
2071 			}
2072 
2073 			free(local_refname);
2074 			local_refname = NULL;
2075 		}
2076 	}
2077 done:
2078 	free(remote_namespace);
2079 	free(local_refname);
2080 	return err;
2081 }
2082 
2083 static const struct got_error *
2084 update_wanted_ref(const char *refname, struct got_object_id *id,
2085     const char *remote_repo_name, int verbosity, struct got_repository *repo)
2086 {
2087 	const struct got_error *err, *unlock_err;
2088 	char *remote_refname;
2089 	struct got_reference *ref;
2090 
2091 	if (strncmp("refs/", refname, 5) == 0)
2092 		refname += 5;
2093 
2094 	if (asprintf(&remote_refname, "refs/remotes/%s/%s",
2095 	    remote_repo_name, refname) == -1)
2096 		return got_error_from_errno("asprintf");
2097 
2098 	err = got_ref_open(&ref, repo, remote_refname, 1);
2099 	if (err) {
2100 		if (err->code != GOT_ERR_NOT_REF)
2101 			goto done;
2102 		err = create_ref(remote_refname, id, verbosity, repo);
2103 	} else {
2104 		err = update_ref(ref, id, 0, verbosity, repo);
2105 		unlock_err = got_ref_unlock(ref);
2106 		if (unlock_err && err == NULL)
2107 			err = unlock_err;
2108 		got_ref_close(ref);
2109 	}
2110 done:
2111 	free(remote_refname);
2112 	return err;
2113 }
2114 
2115 static const struct got_error *
2116 cmd_fetch(int argc, char *argv[])
2117 {
2118 	const struct got_error *error = NULL, *unlock_err;
2119 	char *cwd = NULL, *repo_path = NULL;
2120 	const char *remote_name;
2121 	char *proto = NULL, *host = NULL, *port = NULL;
2122 	char *repo_name = NULL, *server_path = NULL;
2123 	const struct got_remote_repo *remotes, *remote = NULL;
2124 	int nremotes;
2125 	char *id_str = NULL;
2126 	struct got_repository *repo = NULL;
2127 	struct got_worktree *worktree = NULL;
2128 	const struct got_gotconfig *repo_conf = NULL, *worktree_conf = NULL;
2129 	struct got_pathlist_head refs, symrefs, wanted_branches, wanted_refs;
2130 	struct got_pathlist_entry *pe;
2131 	struct got_object_id *pack_hash = NULL;
2132 	int i, ch, fetchfd = -1, fetchstatus;
2133 	pid_t fetchpid = -1;
2134 	struct got_fetch_progress_arg fpa;
2135 	int verbosity = 0, fetch_all_branches = 0, list_refs_only = 0;
2136 	int delete_refs = 0, replace_tags = 0;
2137 
2138 	TAILQ_INIT(&refs);
2139 	TAILQ_INIT(&symrefs);
2140 	TAILQ_INIT(&wanted_branches);
2141 	TAILQ_INIT(&wanted_refs);
2142 
2143 	while ((ch = getopt(argc, argv, "ab:dlr:tvqR:")) != -1) {
2144 		switch (ch) {
2145 		case 'a':
2146 			fetch_all_branches = 1;
2147 			break;
2148 		case 'b':
2149 			error = got_pathlist_append(&wanted_branches,
2150 			    optarg, NULL);
2151 			if (error)
2152 				return error;
2153 			break;
2154 		case 'd':
2155 			delete_refs = 1;
2156 			break;
2157 		case 'l':
2158 			list_refs_only = 1;
2159 			break;
2160 		case 'r':
2161 			repo_path = realpath(optarg, NULL);
2162 			if (repo_path == NULL)
2163 				return got_error_from_errno2("realpath",
2164 				    optarg);
2165 			got_path_strip_trailing_slashes(repo_path);
2166 			break;
2167 		case 't':
2168 			replace_tags = 1;
2169 			break;
2170 		case 'v':
2171 			if (verbosity < 0)
2172 				verbosity = 0;
2173 			else if (verbosity < 3)
2174 				verbosity++;
2175 			break;
2176 		case 'q':
2177 			verbosity = -1;
2178 			break;
2179 		case 'R':
2180 			error = got_pathlist_append(&wanted_refs,
2181 			    optarg, NULL);
2182 			if (error)
2183 				return error;
2184 			break;
2185 		default:
2186 			usage_fetch();
2187 			break;
2188 		}
2189 	}
2190 	argc -= optind;
2191 	argv += optind;
2192 
2193 	if (fetch_all_branches && !TAILQ_EMPTY(&wanted_branches))
2194 		option_conflict('a', 'b');
2195 	if (list_refs_only) {
2196 		if (!TAILQ_EMPTY(&wanted_branches))
2197 			option_conflict('l', 'b');
2198 		if (fetch_all_branches)
2199 			option_conflict('l', 'a');
2200 		if (delete_refs)
2201 			option_conflict('l', 'd');
2202 	}
2203 
2204 	if (argc == 0)
2205 		remote_name = GOT_FETCH_DEFAULT_REMOTE_NAME;
2206 	else if (argc == 1)
2207 		remote_name = argv[0];
2208 	else
2209 		usage_fetch();
2210 
2211 	cwd = getcwd(NULL, 0);
2212 	if (cwd == NULL) {
2213 		error = got_error_from_errno("getcwd");
2214 		goto done;
2215 	}
2216 
2217 	if (repo_path == NULL) {
2218 		error = got_worktree_open(&worktree, cwd);
2219 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2220 			goto done;
2221 		else
2222 			error = NULL;
2223 		if (worktree) {
2224 			repo_path =
2225 			    strdup(got_worktree_get_repo_path(worktree));
2226 			if (repo_path == NULL)
2227 				error = got_error_from_errno("strdup");
2228 			if (error)
2229 				goto done;
2230 		} else {
2231 			repo_path = strdup(cwd);
2232 			if (repo_path == NULL) {
2233 				error = got_error_from_errno("strdup");
2234 				goto done;
2235 			}
2236 		}
2237 	}
2238 
2239 	error = got_repo_open(&repo, repo_path, NULL);
2240 	if (error)
2241 		goto done;
2242 
2243 	if (worktree) {
2244 		worktree_conf = got_worktree_get_gotconfig(worktree);
2245 		if (worktree_conf) {
2246 			got_gotconfig_get_remotes(&nremotes, &remotes,
2247 			    worktree_conf);
2248 			for (i = 0; i < nremotes; i++) {
2249 				if (strcmp(remotes[i].name, remote_name) == 0) {
2250 					remote = &remotes[i];
2251 					break;
2252 				}
2253 			}
2254 		}
2255 	}
2256 	if (remote == NULL) {
2257 		repo_conf = got_repo_get_gotconfig(repo);
2258 		if (repo_conf) {
2259 			got_gotconfig_get_remotes(&nremotes, &remotes,
2260 			    repo_conf);
2261 			for (i = 0; i < nremotes; i++) {
2262 				if (strcmp(remotes[i].name, remote_name) == 0) {
2263 					remote = &remotes[i];
2264 					break;
2265 				}
2266 			}
2267 		}
2268 	}
2269 	if (remote == NULL) {
2270 		got_repo_get_gitconfig_remotes(&nremotes, &remotes, repo);
2271 		for (i = 0; i < nremotes; i++) {
2272 			if (strcmp(remotes[i].name, remote_name) == 0) {
2273 				remote = &remotes[i];
2274 				break;
2275 			}
2276 		}
2277 	}
2278 	if (remote == NULL) {
2279 		error = got_error_path(remote_name, GOT_ERR_NO_REMOTE);
2280 		goto done;
2281 	}
2282 
2283 	if (TAILQ_EMPTY(&wanted_branches)) {
2284 		if (!fetch_all_branches)
2285 			fetch_all_branches = remote->fetch_all_branches;
2286 		for (i = 0; i < remote->nbranches; i++) {
2287 			got_pathlist_append(&wanted_branches,
2288 			    remote->branches[i], NULL);
2289 		}
2290 	}
2291 	if (TAILQ_EMPTY(&wanted_refs)) {
2292 		for (i = 0; i < remote->nrefs; i++) {
2293 			got_pathlist_append(&wanted_refs,
2294 			    remote->refs[i], NULL);
2295 		}
2296 	}
2297 
2298 	error = got_fetch_parse_uri(&proto, &host, &port, &server_path,
2299 	    &repo_name, remote->url);
2300 	if (error)
2301 		goto done;
2302 
2303 	if (strcmp(proto, "git") == 0) {
2304 #ifndef PROFILE
2305 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
2306 		    "sendfd dns inet unveil", NULL) == -1)
2307 			err(1, "pledge");
2308 #endif
2309 	} else if (strcmp(proto, "git+ssh") == 0 ||
2310 	    strcmp(proto, "ssh") == 0) {
2311 #ifndef PROFILE
2312 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
2313 		    "sendfd unveil", NULL) == -1)
2314 			err(1, "pledge");
2315 #endif
2316 	} else if (strcmp(proto, "http") == 0 ||
2317 	    strcmp(proto, "git+http") == 0) {
2318 		error = got_error_path(proto, GOT_ERR_NOT_IMPL);
2319 		goto done;
2320 	} else {
2321 		error = got_error_path(proto, GOT_ERR_BAD_PROTO);
2322 		goto done;
2323 	}
2324 
2325 	if (strcmp(proto, "git+ssh") == 0 || strcmp(proto, "ssh") == 0) {
2326 		if (unveil(GOT_FETCH_PATH_SSH, "x") != 0) {
2327 			error = got_error_from_errno2("unveil",
2328 			    GOT_FETCH_PATH_SSH);
2329 			goto done;
2330 		}
2331 	}
2332 	error = apply_unveil(got_repo_get_path(repo), 0, NULL);
2333 	if (error)
2334 		goto done;
2335 
2336 	if (verbosity >= 0)
2337 		printf("Connecting to \"%s\" %s%s%s\n", remote->name, host,
2338 		    port ? ":" : "", port ? port : "");
2339 
2340 	error = got_fetch_connect(&fetchpid, &fetchfd, proto, host, port,
2341 	    server_path, verbosity);
2342 	if (error)
2343 		goto done;
2344 
2345 	fpa.last_scaled_size[0] = '\0';
2346 	fpa.last_p_indexed = -1;
2347 	fpa.last_p_resolved = -1;
2348 	fpa.verbosity = verbosity;
2349 	fpa.repo = repo;
2350 	fpa.create_configs = 0;
2351 	fpa.configs_created = 0;
2352 	memset(&fpa.config_info, 0, sizeof(fpa.config_info));
2353 	error = got_fetch_pack(&pack_hash, &refs, &symrefs, remote->name,
2354 	    remote->mirror_references, fetch_all_branches, &wanted_branches,
2355 	    &wanted_refs, list_refs_only, verbosity, fetchfd, repo,
2356 	    fetch_progress, &fpa);
2357 	if (error)
2358 		goto done;
2359 
2360 	if (list_refs_only) {
2361 		error = list_remote_refs(&symrefs, &refs);
2362 		goto done;
2363 	}
2364 
2365 	if (pack_hash == NULL) {
2366 		if (verbosity >= 0)
2367 			printf("Already up-to-date\n");
2368 	} else if (verbosity >= 0) {
2369 		error = got_object_id_str(&id_str, pack_hash);
2370 		if (error)
2371 			goto done;
2372 		printf("\nFetched %s.pack\n", id_str);
2373 		free(id_str);
2374 		id_str = NULL;
2375 	}
2376 
2377 	/* Update references provided with the pack file. */
2378 	TAILQ_FOREACH(pe, &refs, entry) {
2379 		const char *refname = pe->path;
2380 		struct got_object_id *id = pe->data;
2381 		struct got_reference *ref;
2382 		char *remote_refname;
2383 
2384 		if (is_wanted_ref(&wanted_refs, refname) &&
2385 		    !remote->mirror_references) {
2386 			error = update_wanted_ref(refname, id,
2387 			    remote->name, verbosity, repo);
2388 			if (error)
2389 				goto done;
2390 			continue;
2391 		}
2392 
2393 		if (remote->mirror_references ||
2394 		    strncmp("refs/tags/", refname, 10) == 0) {
2395 			error = got_ref_open(&ref, repo, refname, 1);
2396 			if (error) {
2397 				if (error->code != GOT_ERR_NOT_REF)
2398 					goto done;
2399 				error = create_ref(refname, id, verbosity,
2400 				    repo);
2401 				if (error)
2402 					goto done;
2403 			} else {
2404 				error = update_ref(ref, id, replace_tags,
2405 				    verbosity, repo);
2406 				unlock_err = got_ref_unlock(ref);
2407 				if (unlock_err && error == NULL)
2408 					error = unlock_err;
2409 				got_ref_close(ref);
2410 				if (error)
2411 					goto done;
2412 			}
2413 		} else if (strncmp("refs/heads/", refname, 11) == 0) {
2414 			if (asprintf(&remote_refname, "refs/remotes/%s/%s",
2415 			    remote_name, refname + 11) == -1) {
2416 				error = got_error_from_errno("asprintf");
2417 				goto done;
2418 			}
2419 
2420 			error = got_ref_open(&ref, repo, remote_refname, 1);
2421 			if (error) {
2422 				if (error->code != GOT_ERR_NOT_REF)
2423 					goto done;
2424 				error = create_ref(remote_refname, id, 
2425 				    verbosity, repo);
2426 				if (error)
2427 					goto done;
2428 			} else {
2429 				error = update_ref(ref, id, replace_tags,
2430 				    verbosity, repo);
2431 				unlock_err = got_ref_unlock(ref);
2432 				if (unlock_err && error == NULL)
2433 					error = unlock_err;
2434 				got_ref_close(ref);
2435 				if (error)
2436 					goto done;
2437 			}
2438 
2439 			/* Also create a local branch if none exists yet. */
2440 			error = got_ref_open(&ref, repo, refname, 1);
2441 			if (error) {
2442 				if (error->code != GOT_ERR_NOT_REF)
2443 					goto done;
2444 				error = create_ref(refname, id, verbosity,
2445 				    repo);
2446 				if (error)
2447 					goto done;
2448 			} else {
2449 				unlock_err = got_ref_unlock(ref);
2450 				if (unlock_err && error == NULL)
2451 					error = unlock_err;
2452 				got_ref_close(ref);
2453 			}
2454 		}
2455 	}
2456 	if (delete_refs) {
2457 		error = delete_missing_refs(&refs, &symrefs, remote,
2458 		    verbosity, repo);
2459 		if (error)
2460 			goto done;
2461 	}
2462 
2463 	if (!remote->mirror_references) {
2464 		/* Update remote HEAD reference if the server provided one. */
2465 		TAILQ_FOREACH(pe, &symrefs, entry) {
2466 			struct got_reference *target_ref;
2467 			const char *refname = pe->path;
2468 			const char *target = pe->data;
2469 			char *remote_refname = NULL, *remote_target = NULL;
2470 
2471 			if (strcmp(refname, GOT_REF_HEAD) != 0)
2472 				continue;
2473 
2474 			if (strncmp("refs/heads/", target, 11) != 0)
2475 				continue;
2476 
2477 			if (asprintf(&remote_refname, "refs/remotes/%s/%s",
2478 			    remote->name, refname) == -1) {
2479 				error = got_error_from_errno("asprintf");
2480 				goto done;
2481 			}
2482 			if (asprintf(&remote_target, "refs/remotes/%s/%s",
2483 			    remote->name, target + 11) == -1) {
2484 				error = got_error_from_errno("asprintf");
2485 				free(remote_refname);
2486 				goto done;
2487 			}
2488 
2489 			error = got_ref_open(&target_ref, repo, remote_target,
2490 			    0);
2491 			if (error) {
2492 				free(remote_refname);
2493 				free(remote_target);
2494 				if (error->code == GOT_ERR_NOT_REF) {
2495 					error = NULL;
2496 					continue;
2497 				}
2498 				goto done;
2499 			}
2500 			error = update_symref(remote_refname, target_ref,
2501 			    verbosity, repo);
2502 			free(remote_refname);
2503 			free(remote_target);
2504 			got_ref_close(target_ref);
2505 			if (error)
2506 				goto done;
2507 		}
2508 	}
2509 done:
2510 	if (fetchpid > 0) {
2511 		if (kill(fetchpid, SIGTERM) == -1)
2512 			error = got_error_from_errno("kill");
2513 		if (waitpid(fetchpid, &fetchstatus, 0) == -1 && error == NULL)
2514 			error = got_error_from_errno("waitpid");
2515 	}
2516 	if (fetchfd != -1 && close(fetchfd) == -1 && error == NULL)
2517 		error = got_error_from_errno("close");
2518 	if (repo)
2519 		got_repo_close(repo);
2520 	if (worktree)
2521 		got_worktree_close(worktree);
2522 	TAILQ_FOREACH(pe, &refs, entry) {
2523 		free((void *)pe->path);
2524 		free(pe->data);
2525 	}
2526 	got_pathlist_free(&refs);
2527 	TAILQ_FOREACH(pe, &symrefs, entry) {
2528 		free((void *)pe->path);
2529 		free(pe->data);
2530 	}
2531 	got_pathlist_free(&symrefs);
2532 	got_pathlist_free(&wanted_branches);
2533 	got_pathlist_free(&wanted_refs);
2534 	free(id_str);
2535 	free(cwd);
2536 	free(repo_path);
2537 	free(pack_hash);
2538 	free(proto);
2539 	free(host);
2540 	free(port);
2541 	free(server_path);
2542 	free(repo_name);
2543 	return error;
2544 }
2545 
2546 
2547 __dead static void
2548 usage_checkout(void)
2549 {
2550 	fprintf(stderr, "usage: %s checkout [-E] [-b branch] [-c commit] "
2551 	    "[-p prefix] repository-path [worktree-path]\n", getprogname());
2552 	exit(1);
2553 }
2554 
2555 static void
2556 show_worktree_base_ref_warning(void)
2557 {
2558 	fprintf(stderr, "%s: warning: could not create a reference "
2559 	    "to the work tree's base commit; the commit could be "
2560 	    "garbage-collected by Git; making the repository "
2561 	    "writable and running 'got update' will prevent this\n",
2562 	    getprogname());
2563 }
2564 
2565 struct got_checkout_progress_arg {
2566 	const char *worktree_path;
2567 	int had_base_commit_ref_error;
2568 };
2569 
2570 static const struct got_error *
2571 checkout_progress(void *arg, unsigned char status, const char *path)
2572 {
2573 	struct got_checkout_progress_arg *a = arg;
2574 
2575 	/* Base commit bump happens silently. */
2576 	if (status == GOT_STATUS_BUMP_BASE)
2577 		return NULL;
2578 
2579 	if (status == GOT_STATUS_BASE_REF_ERR) {
2580 		a->had_base_commit_ref_error = 1;
2581 		return NULL;
2582 	}
2583 
2584 	while (path[0] == '/')
2585 		path++;
2586 
2587 	printf("%c  %s/%s\n", status, a->worktree_path, path);
2588 	return NULL;
2589 }
2590 
2591 static const struct got_error *
2592 check_cancelled(void *arg)
2593 {
2594 	if (sigint_received || sigpipe_received)
2595 		return got_error(GOT_ERR_CANCELLED);
2596 	return NULL;
2597 }
2598 
2599 static const struct got_error *
2600 check_linear_ancestry(struct got_object_id *commit_id,
2601     struct got_object_id *base_commit_id, int allow_forwards_in_time_only,
2602     struct got_repository *repo)
2603 {
2604 	const struct got_error *err = NULL;
2605 	struct got_object_id *yca_id;
2606 
2607 	err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
2608 	    commit_id, base_commit_id, repo, check_cancelled, NULL);
2609 	if (err)
2610 		return err;
2611 
2612 	if (yca_id == NULL)
2613 		return got_error(GOT_ERR_ANCESTRY);
2614 
2615 	/*
2616 	 * Require a straight line of history between the target commit
2617 	 * and the work tree's base commit.
2618 	 *
2619 	 * Non-linear situations such as this require a rebase:
2620 	 *
2621 	 * (commit) D       F (base_commit)
2622 	 *           \     /
2623 	 *            C   E
2624 	 *             \ /
2625 	 *              B (yca)
2626 	 *              |
2627 	 *              A
2628 	 *
2629 	 * 'got update' only handles linear cases:
2630 	 * Update forwards in time:  A (base/yca) - B - C - D (commit)
2631 	 * Update backwards in time: D (base) - C - B - A (commit/yca)
2632 	 */
2633 	if (allow_forwards_in_time_only) {
2634 	    if (got_object_id_cmp(base_commit_id, yca_id) != 0)
2635 		return got_error(GOT_ERR_ANCESTRY);
2636 	} else if (got_object_id_cmp(commit_id, yca_id) != 0 &&
2637 	    got_object_id_cmp(base_commit_id, yca_id) != 0)
2638 		return got_error(GOT_ERR_ANCESTRY);
2639 
2640 	free(yca_id);
2641 	return NULL;
2642 }
2643 
2644 static const struct got_error *
2645 check_same_branch(struct got_object_id *commit_id,
2646     struct got_reference *head_ref, struct got_object_id *yca_id,
2647     struct got_repository *repo)
2648 {
2649 	const struct got_error *err = NULL;
2650 	struct got_commit_graph *graph = NULL;
2651 	struct got_object_id *head_commit_id = NULL;
2652 	int is_same_branch = 0;
2653 
2654 	err = got_ref_resolve(&head_commit_id, repo, head_ref);
2655 	if (err)
2656 		goto done;
2657 
2658 	if (got_object_id_cmp(head_commit_id, commit_id) == 0) {
2659 		is_same_branch = 1;
2660 		goto done;
2661 	}
2662 	if (yca_id && got_object_id_cmp(commit_id, yca_id) == 0) {
2663 		is_same_branch = 1;
2664 		goto done;
2665 	}
2666 
2667 	err = got_commit_graph_open(&graph, "/", 1);
2668 	if (err)
2669 		goto done;
2670 
2671 	err = got_commit_graph_iter_start(graph, head_commit_id, repo,
2672 	    check_cancelled, NULL);
2673 	if (err)
2674 		goto done;
2675 
2676 	for (;;) {
2677 		struct got_object_id *id;
2678 		err = got_commit_graph_iter_next(&id, graph, repo,
2679 		    check_cancelled, NULL);
2680 		if (err) {
2681 			if (err->code == GOT_ERR_ITER_COMPLETED)
2682 				err = NULL;
2683 			break;
2684 		}
2685 
2686 		if (id) {
2687 			if (yca_id && got_object_id_cmp(id, yca_id) == 0)
2688 				break;
2689 			if (got_object_id_cmp(id, commit_id) == 0) {
2690 				is_same_branch = 1;
2691 				break;
2692 			}
2693 		}
2694 	}
2695 done:
2696 	if (graph)
2697 		got_commit_graph_close(graph);
2698 	free(head_commit_id);
2699 	if (!err && !is_same_branch)
2700 		err = got_error(GOT_ERR_ANCESTRY);
2701 	return err;
2702 }
2703 
2704 static const struct got_error *
2705 checkout_ancestry_error(struct got_reference *ref, const char *commit_id_str)
2706 {
2707 	static char msg[512];
2708 	const char *branch_name;
2709 
2710 	if (got_ref_is_symbolic(ref))
2711 		branch_name = got_ref_get_symref_target(ref);
2712 	else
2713 		branch_name = got_ref_get_name(ref);
2714 
2715 	if (strncmp("refs/heads/", branch_name, 11) == 0)
2716 		branch_name += 11;
2717 
2718 	snprintf(msg, sizeof(msg),
2719 	    "target commit is not contained in branch '%s'; "
2720 	    "the branch to use must be specified with -b; "
2721 	    "if necessary a new branch can be created for "
2722 	    "this commit with 'got branch -c %s BRANCH_NAME'",
2723 	    branch_name, commit_id_str);
2724 
2725 	return got_error_msg(GOT_ERR_ANCESTRY, msg);
2726 }
2727 
2728 static const struct got_error *
2729 cmd_checkout(int argc, char *argv[])
2730 {
2731 	const struct got_error *error = NULL;
2732 	struct got_repository *repo = NULL;
2733 	struct got_reference *head_ref = NULL;
2734 	struct got_worktree *worktree = NULL;
2735 	char *repo_path = NULL;
2736 	char *worktree_path = NULL;
2737 	const char *path_prefix = "";
2738 	const char *branch_name = GOT_REF_HEAD;
2739 	char *commit_id_str = NULL;
2740 	char *cwd = NULL;
2741 	int ch, same_path_prefix, allow_nonempty = 0;
2742 	struct got_pathlist_head paths;
2743 	struct got_checkout_progress_arg cpa;
2744 
2745 	TAILQ_INIT(&paths);
2746 
2747 	while ((ch = getopt(argc, argv, "b:c:Ep:")) != -1) {
2748 		switch (ch) {
2749 		case 'b':
2750 			branch_name = optarg;
2751 			break;
2752 		case 'c':
2753 			commit_id_str = strdup(optarg);
2754 			if (commit_id_str == NULL)
2755 				return got_error_from_errno("strdup");
2756 			break;
2757 		case 'E':
2758 			allow_nonempty = 1;
2759 			break;
2760 		case 'p':
2761 			path_prefix = optarg;
2762 			break;
2763 		default:
2764 			usage_checkout();
2765 			/* NOTREACHED */
2766 		}
2767 	}
2768 
2769 	argc -= optind;
2770 	argv += optind;
2771 
2772 #ifndef PROFILE
2773 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
2774 	    "unveil", NULL) == -1)
2775 		err(1, "pledge");
2776 #endif
2777 	if (argc == 1) {
2778 		char *base, *dotgit;
2779 		const char *path;
2780 		repo_path = realpath(argv[0], NULL);
2781 		if (repo_path == NULL)
2782 			return got_error_from_errno2("realpath", argv[0]);
2783 		cwd = getcwd(NULL, 0);
2784 		if (cwd == NULL) {
2785 			error = got_error_from_errno("getcwd");
2786 			goto done;
2787 		}
2788 		if (path_prefix[0])
2789 			path = path_prefix;
2790 		else
2791 			path = repo_path;
2792 		error = got_path_basename(&base, path);
2793 		if (error)
2794 			goto done;
2795 		dotgit = strstr(base, ".git");
2796 		if (dotgit)
2797 			*dotgit = '\0';
2798 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
2799 			error = got_error_from_errno("asprintf");
2800 			free(base);
2801 			goto done;
2802 		}
2803 		free(base);
2804 	} else if (argc == 2) {
2805 		repo_path = realpath(argv[0], NULL);
2806 		if (repo_path == NULL) {
2807 			error = got_error_from_errno2("realpath", argv[0]);
2808 			goto done;
2809 		}
2810 		worktree_path = realpath(argv[1], NULL);
2811 		if (worktree_path == NULL) {
2812 			if (errno != ENOENT) {
2813 				error = got_error_from_errno2("realpath",
2814 				    argv[1]);
2815 				goto done;
2816 			}
2817 			worktree_path = strdup(argv[1]);
2818 			if (worktree_path == NULL) {
2819 				error = got_error_from_errno("strdup");
2820 				goto done;
2821 			}
2822 		}
2823 	} else
2824 		usage_checkout();
2825 
2826 	got_path_strip_trailing_slashes(repo_path);
2827 	got_path_strip_trailing_slashes(worktree_path);
2828 
2829 	error = got_repo_open(&repo, repo_path, NULL);
2830 	if (error != NULL)
2831 		goto done;
2832 
2833 	/* Pre-create work tree path for unveil(2) */
2834 	error = got_path_mkdir(worktree_path);
2835 	if (error) {
2836 		if (!(error->code == GOT_ERR_ERRNO && errno == EISDIR) &&
2837 		    !(error->code == GOT_ERR_ERRNO && errno == EEXIST))
2838 			goto done;
2839 		if (!allow_nonempty &&
2840 		    !got_path_dir_is_empty(worktree_path)) {
2841 			error = got_error_path(worktree_path,
2842 			    GOT_ERR_DIR_NOT_EMPTY);
2843 			goto done;
2844 		}
2845 	}
2846 
2847 	error = apply_unveil(got_repo_get_path(repo), 0, worktree_path);
2848 	if (error)
2849 		goto done;
2850 
2851 	error = got_ref_open(&head_ref, repo, branch_name, 0);
2852 	if (error != NULL)
2853 		goto done;
2854 
2855 	error = got_worktree_init(worktree_path, head_ref, path_prefix, repo);
2856 	if (error != NULL && !(error->code == GOT_ERR_ERRNO && errno == EEXIST))
2857 		goto done;
2858 
2859 	error = got_worktree_open(&worktree, worktree_path);
2860 	if (error != NULL)
2861 		goto done;
2862 
2863 	error = got_worktree_match_path_prefix(&same_path_prefix, worktree,
2864 	    path_prefix);
2865 	if (error != NULL)
2866 		goto done;
2867 	if (!same_path_prefix) {
2868 		error = got_error(GOT_ERR_PATH_PREFIX);
2869 		goto done;
2870 	}
2871 
2872 	if (commit_id_str) {
2873 		struct got_object_id *commit_id;
2874 		struct got_reflist_head refs;
2875 		TAILQ_INIT(&refs);
2876 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
2877 		    NULL);
2878 		if (error)
2879 			goto done;
2880 		error = got_repo_match_object_id(&commit_id, NULL,
2881 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &refs, repo);
2882 		got_ref_list_free(&refs);
2883 		if (error)
2884 			goto done;
2885 		error = check_linear_ancestry(commit_id,
2886 		    got_worktree_get_base_commit_id(worktree), 0, repo);
2887 		if (error != NULL) {
2888 			free(commit_id);
2889 			if (error->code == GOT_ERR_ANCESTRY) {
2890 				error = checkout_ancestry_error(
2891 				    head_ref, commit_id_str);
2892 			}
2893 			goto done;
2894 		}
2895 		error = check_same_branch(commit_id, head_ref, NULL, repo);
2896 		if (error) {
2897 			if (error->code == GOT_ERR_ANCESTRY) {
2898 				error = checkout_ancestry_error(
2899 				    head_ref, commit_id_str);
2900 			}
2901 			goto done;
2902 		}
2903 		error = got_worktree_set_base_commit_id(worktree, repo,
2904 		    commit_id);
2905 		free(commit_id);
2906 		if (error)
2907 			goto done;
2908 	}
2909 
2910 	error = got_pathlist_append(&paths, "", NULL);
2911 	if (error)
2912 		goto done;
2913 	cpa.worktree_path = worktree_path;
2914 	cpa.had_base_commit_ref_error = 0;
2915 	error = got_worktree_checkout_files(worktree, &paths, repo,
2916 	    checkout_progress, &cpa, check_cancelled, NULL);
2917 	if (error != NULL)
2918 		goto done;
2919 
2920 	printf("Now shut up and hack\n");
2921 	if (cpa.had_base_commit_ref_error)
2922 		show_worktree_base_ref_warning();
2923 done:
2924 	got_pathlist_free(&paths);
2925 	free(commit_id_str);
2926 	free(repo_path);
2927 	free(worktree_path);
2928 	free(cwd);
2929 	return error;
2930 }
2931 
2932 struct got_update_progress_arg {
2933 	int did_something;
2934 	int conflicts;
2935 	int obstructed;
2936 	int not_updated;
2937 };
2938 
2939 void
2940 print_update_progress_stats(struct got_update_progress_arg *upa)
2941 {
2942 	if (!upa->did_something)
2943 		return;
2944 
2945 	if (upa->conflicts > 0)
2946 		printf("Files with new merge conflicts: %d\n", upa->conflicts);
2947 	if (upa->obstructed > 0)
2948 		printf("File paths obstructed by a non-regular file: %d\n",
2949 		    upa->obstructed);
2950 	if (upa->not_updated > 0)
2951 		printf("Files not updated because of existing merge "
2952 		    "conflicts: %d\n", upa->not_updated);
2953 }
2954 
2955 __dead static void
2956 usage_update(void)
2957 {
2958 	fprintf(stderr, "usage: %s update [-b branch] [-c commit] [path ...]\n",
2959 	    getprogname());
2960 	exit(1);
2961 }
2962 
2963 static const struct got_error *
2964 update_progress(void *arg, unsigned char status, const char *path)
2965 {
2966 	struct got_update_progress_arg *upa = arg;
2967 
2968 	if (status == GOT_STATUS_EXISTS ||
2969 	    status == GOT_STATUS_BASE_REF_ERR)
2970 		return NULL;
2971 
2972 	upa->did_something = 1;
2973 
2974 	/* Base commit bump happens silently. */
2975 	if (status == GOT_STATUS_BUMP_BASE)
2976 		return NULL;
2977 
2978 	if (status == GOT_STATUS_CONFLICT)
2979 		upa->conflicts++;
2980 	if (status == GOT_STATUS_OBSTRUCTED)
2981 		upa->obstructed++;
2982 	if (status == GOT_STATUS_CANNOT_UPDATE)
2983 		upa->not_updated++;
2984 
2985 	while (path[0] == '/')
2986 		path++;
2987 	printf("%c  %s\n", status, path);
2988 	return NULL;
2989 }
2990 
2991 static const struct got_error *
2992 switch_head_ref(struct got_reference *head_ref,
2993     struct got_object_id *commit_id, struct got_worktree *worktree,
2994     struct got_repository *repo)
2995 {
2996 	const struct got_error *err = NULL;
2997 	char *base_id_str;
2998 	int ref_has_moved = 0;
2999 
3000 	/* Trivial case: switching between two different references. */
3001 	if (strcmp(got_ref_get_name(head_ref),
3002 	    got_worktree_get_head_ref_name(worktree)) != 0) {
3003 		printf("Switching work tree from %s to %s\n",
3004 		    got_worktree_get_head_ref_name(worktree),
3005 		    got_ref_get_name(head_ref));
3006 		return got_worktree_set_head_ref(worktree, head_ref);
3007 	}
3008 
3009 	err = check_linear_ancestry(commit_id,
3010 	    got_worktree_get_base_commit_id(worktree), 0, repo);
3011 	if (err) {
3012 		if (err->code != GOT_ERR_ANCESTRY)
3013 			return err;
3014 		ref_has_moved = 1;
3015 	}
3016 	if (!ref_has_moved)
3017 		return NULL;
3018 
3019 	/* Switching to a rebased branch with the same reference name. */
3020 	err = got_object_id_str(&base_id_str,
3021 	    got_worktree_get_base_commit_id(worktree));
3022 	if (err)
3023 		return err;
3024 	printf("Reference %s now points at a different branch\n",
3025 	    got_worktree_get_head_ref_name(worktree));
3026 	printf("Switching work tree from %s to %s\n", base_id_str,
3027 	    got_worktree_get_head_ref_name(worktree));
3028 	return NULL;
3029 }
3030 
3031 static const struct got_error *
3032 check_rebase_or_histedit_in_progress(struct got_worktree *worktree)
3033 {
3034 	const struct got_error *err;
3035 	int in_progress;
3036 
3037 	err = got_worktree_rebase_in_progress(&in_progress, worktree);
3038 	if (err)
3039 		return err;
3040 	if (in_progress)
3041 		return got_error(GOT_ERR_REBASING);
3042 
3043 	err = got_worktree_histedit_in_progress(&in_progress, worktree);
3044 	if (err)
3045 		return err;
3046 	if (in_progress)
3047 		return got_error(GOT_ERR_HISTEDIT_BUSY);
3048 
3049 	return NULL;
3050 }
3051 
3052 static const struct got_error *
3053 get_worktree_paths_from_argv(struct got_pathlist_head *paths, int argc,
3054     char *argv[], struct got_worktree *worktree)
3055 {
3056 	const struct got_error *err = NULL;
3057 	char *path;
3058 	int i;
3059 
3060 	if (argc == 0) {
3061 		path = strdup("");
3062 		if (path == NULL)
3063 			return got_error_from_errno("strdup");
3064 		return got_pathlist_append(paths, path, NULL);
3065 	}
3066 
3067 	for (i = 0; i < argc; i++) {
3068 		err = got_worktree_resolve_path(&path, worktree, argv[i]);
3069 		if (err)
3070 			break;
3071 		err = got_pathlist_append(paths, path, NULL);
3072 		if (err) {
3073 			free(path);
3074 			break;
3075 		}
3076 	}
3077 
3078 	return err;
3079 }
3080 
3081 static const struct got_error *
3082 wrap_not_worktree_error(const struct got_error *orig_err,
3083     const char *cmdname, const char *path)
3084 {
3085 	const struct got_error *err;
3086 	struct got_repository *repo;
3087 	static char msg[512];
3088 
3089 	err = got_repo_open(&repo, path, NULL);
3090 	if (err)
3091 		return orig_err;
3092 
3093 	snprintf(msg, sizeof(msg),
3094 	    "'got %s' needs a work tree in addition to a git repository\n"
3095 	    "Work trees can be checked out from this Git repository with "
3096 	    "'got checkout'.\n"
3097 	    "The got(1) manual page contains more information.", cmdname);
3098 	err = got_error_msg(GOT_ERR_NOT_WORKTREE, msg);
3099 	got_repo_close(repo);
3100 	return err;
3101 }
3102 
3103 static const struct got_error *
3104 cmd_update(int argc, char *argv[])
3105 {
3106 	const struct got_error *error = NULL;
3107 	struct got_repository *repo = NULL;
3108 	struct got_worktree *worktree = NULL;
3109 	char *worktree_path = NULL;
3110 	struct got_object_id *commit_id = NULL;
3111 	char *commit_id_str = NULL;
3112 	const char *branch_name = NULL;
3113 	struct got_reference *head_ref = NULL;
3114 	struct got_pathlist_head paths;
3115 	struct got_pathlist_entry *pe;
3116 	int ch;
3117 	struct got_update_progress_arg upa;
3118 
3119 	TAILQ_INIT(&paths);
3120 
3121 	while ((ch = getopt(argc, argv, "b:c:")) != -1) {
3122 		switch (ch) {
3123 		case 'b':
3124 			branch_name = optarg;
3125 			break;
3126 		case 'c':
3127 			commit_id_str = strdup(optarg);
3128 			if (commit_id_str == NULL)
3129 				return got_error_from_errno("strdup");
3130 			break;
3131 		default:
3132 			usage_update();
3133 			/* NOTREACHED */
3134 		}
3135 	}
3136 
3137 	argc -= optind;
3138 	argv += optind;
3139 
3140 #ifndef PROFILE
3141 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
3142 	    "unveil", NULL) == -1)
3143 		err(1, "pledge");
3144 #endif
3145 	worktree_path = getcwd(NULL, 0);
3146 	if (worktree_path == NULL) {
3147 		error = got_error_from_errno("getcwd");
3148 		goto done;
3149 	}
3150 	error = got_worktree_open(&worktree, worktree_path);
3151 	if (error) {
3152 		if (error->code == GOT_ERR_NOT_WORKTREE)
3153 			error = wrap_not_worktree_error(error, "update",
3154 			    worktree_path);
3155 		goto done;
3156 	}
3157 
3158 	error = check_rebase_or_histedit_in_progress(worktree);
3159 	if (error)
3160 		goto done;
3161 
3162 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
3163 	    NULL);
3164 	if (error != NULL)
3165 		goto done;
3166 
3167 	error = apply_unveil(got_repo_get_path(repo), 0,
3168 	    got_worktree_get_root_path(worktree));
3169 	if (error)
3170 		goto done;
3171 
3172 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
3173 	if (error)
3174 		goto done;
3175 
3176 	error = got_ref_open(&head_ref, repo, branch_name ? branch_name :
3177 	    got_worktree_get_head_ref_name(worktree), 0);
3178 	if (error != NULL)
3179 		goto done;
3180 	if (commit_id_str == NULL) {
3181 		error = got_ref_resolve(&commit_id, repo, head_ref);
3182 		if (error != NULL)
3183 			goto done;
3184 		error = got_object_id_str(&commit_id_str, commit_id);
3185 		if (error != NULL)
3186 			goto done;
3187 	} else {
3188 		struct got_reflist_head refs;
3189 		TAILQ_INIT(&refs);
3190 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
3191 		    NULL);
3192 		if (error)
3193 			goto done;
3194 		error = got_repo_match_object_id(&commit_id, NULL,
3195 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &refs, repo);
3196 		got_ref_list_free(&refs);
3197 		free(commit_id_str);
3198 		commit_id_str = NULL;
3199 		if (error)
3200 			goto done;
3201 		error = got_object_id_str(&commit_id_str, commit_id);
3202 		if (error)
3203 			goto done;
3204 	}
3205 
3206 	if (branch_name) {
3207 		struct got_object_id *head_commit_id;
3208 		TAILQ_FOREACH(pe, &paths, entry) {
3209 			if (pe->path_len == 0)
3210 				continue;
3211 			error = got_error_msg(GOT_ERR_BAD_PATH,
3212 			    "switching between branches requires that "
3213 			    "the entire work tree gets updated");
3214 			goto done;
3215 		}
3216 		error = got_ref_resolve(&head_commit_id, repo, head_ref);
3217 		if (error)
3218 			goto done;
3219 		error = check_linear_ancestry(commit_id, head_commit_id, 0,
3220 		    repo);
3221 		free(head_commit_id);
3222 		if (error != NULL)
3223 			goto done;
3224 		error = check_same_branch(commit_id, head_ref, NULL, repo);
3225 		if (error)
3226 			goto done;
3227 		error = switch_head_ref(head_ref, commit_id, worktree, repo);
3228 		if (error)
3229 			goto done;
3230 	} else {
3231 		error = check_linear_ancestry(commit_id,
3232 		    got_worktree_get_base_commit_id(worktree), 0, repo);
3233 		if (error != NULL) {
3234 			if (error->code == GOT_ERR_ANCESTRY)
3235 				error = got_error(GOT_ERR_BRANCH_MOVED);
3236 			goto done;
3237 		}
3238 		error = check_same_branch(commit_id, head_ref, NULL, repo);
3239 		if (error)
3240 			goto done;
3241 	}
3242 
3243 	if (got_object_id_cmp(got_worktree_get_base_commit_id(worktree),
3244 	    commit_id) != 0) {
3245 		error = got_worktree_set_base_commit_id(worktree, repo,
3246 		    commit_id);
3247 		if (error)
3248 			goto done;
3249 	}
3250 
3251 	memset(&upa, 0, sizeof(upa));
3252 	error = got_worktree_checkout_files(worktree, &paths, repo,
3253 	    update_progress, &upa, check_cancelled, NULL);
3254 	if (error != NULL)
3255 		goto done;
3256 
3257 	if (upa.did_something)
3258 		printf("Updated to commit %s\n", commit_id_str);
3259 	else
3260 		printf("Already up-to-date\n");
3261 	print_update_progress_stats(&upa);
3262 done:
3263 	free(worktree_path);
3264 	TAILQ_FOREACH(pe, &paths, entry)
3265 		free((char *)pe->path);
3266 	got_pathlist_free(&paths);
3267 	free(commit_id);
3268 	free(commit_id_str);
3269 	return error;
3270 }
3271 
3272 static const struct got_error *
3273 diff_blobs(struct got_object_id *blob_id1, struct got_object_id *blob_id2,
3274     const char *path, int diff_context, int ignore_whitespace,
3275     int force_text_diff, struct got_repository *repo)
3276 {
3277 	const struct got_error *err = NULL;
3278 	struct got_blob_object *blob1 = NULL, *blob2 = NULL;
3279 
3280 	if (blob_id1) {
3281 		err = got_object_open_as_blob(&blob1, repo, blob_id1, 8192);
3282 		if (err)
3283 			goto done;
3284 	}
3285 
3286 	err = got_object_open_as_blob(&blob2, repo, blob_id2, 8192);
3287 	if (err)
3288 		goto done;
3289 
3290 	while (path[0] == '/')
3291 		path++;
3292 	err = got_diff_blob(NULL, NULL, blob1, blob2, path, path,
3293 	    diff_context, ignore_whitespace, force_text_diff, stdout);
3294 done:
3295 	if (blob1)
3296 		got_object_blob_close(blob1);
3297 	got_object_blob_close(blob2);
3298 	return err;
3299 }
3300 
3301 static const struct got_error *
3302 diff_trees(struct got_object_id *tree_id1, struct got_object_id *tree_id2,
3303     const char *path, int diff_context, int ignore_whitespace,
3304     int force_text_diff, struct got_repository *repo)
3305 {
3306 	const struct got_error *err = NULL;
3307 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3308 	struct got_diff_blob_output_unidiff_arg arg;
3309 
3310 	if (tree_id1) {
3311 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3312 		if (err)
3313 			goto done;
3314 	}
3315 
3316 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3317 	if (err)
3318 		goto done;
3319 
3320 	arg.diff_context = diff_context;
3321 	arg.ignore_whitespace = ignore_whitespace;
3322 	arg.force_text_diff = force_text_diff;
3323 	arg.outfile = stdout;
3324 	arg.line_offsets = NULL;
3325 	arg.nlines = 0;
3326 	while (path[0] == '/')
3327 		path++;
3328 	err = got_diff_tree(tree1, tree2, path, path, repo,
3329 	    got_diff_blob_output_unidiff, &arg, 1);
3330 done:
3331 	if (tree1)
3332 		got_object_tree_close(tree1);
3333 	if (tree2)
3334 		got_object_tree_close(tree2);
3335 	return err;
3336 }
3337 
3338 static const struct got_error *
3339 get_changed_paths(struct got_pathlist_head *paths,
3340     struct got_commit_object *commit, struct got_repository *repo)
3341 {
3342 	const struct got_error *err = NULL;
3343 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3344 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3345 	struct got_object_qid *qid;
3346 
3347 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
3348 	if (qid != NULL) {
3349 		struct got_commit_object *pcommit;
3350 		err = got_object_open_as_commit(&pcommit, repo,
3351 		    qid->id);
3352 		if (err)
3353 			return err;
3354 
3355 		tree_id1 = got_object_commit_get_tree_id(pcommit);
3356 		got_object_commit_close(pcommit);
3357 
3358 	}
3359 
3360 	if (tree_id1) {
3361 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3362 		if (err)
3363 			goto done;
3364 	}
3365 
3366 	tree_id2 = got_object_commit_get_tree_id(commit);
3367 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3368 	if (err)
3369 		goto done;
3370 
3371 	err = got_diff_tree(tree1, tree2, "", "", repo,
3372 	    got_diff_tree_collect_changed_paths, paths, 0);
3373 done:
3374 	if (tree1)
3375 		got_object_tree_close(tree1);
3376 	if (tree2)
3377 		got_object_tree_close(tree2);
3378 	return err;
3379 }
3380 
3381 static const struct got_error *
3382 print_patch(struct got_commit_object *commit, struct got_object_id *id,
3383     const char *path, int diff_context, struct got_repository *repo)
3384 {
3385 	const struct got_error *err = NULL;
3386 	struct got_commit_object *pcommit = NULL;
3387 	char *id_str1 = NULL, *id_str2 = NULL;
3388 	struct got_object_id *obj_id1 = NULL, *obj_id2 = NULL;
3389 	struct got_object_qid *qid;
3390 
3391 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
3392 	if (qid != NULL) {
3393 		err = got_object_open_as_commit(&pcommit, repo,
3394 		    qid->id);
3395 		if (err)
3396 			return err;
3397 	}
3398 
3399 	if (path && path[0] != '\0') {
3400 		int obj_type;
3401 		err = got_object_id_by_path(&obj_id2, repo, id, path);
3402 		if (err)
3403 			goto done;
3404 		err = got_object_id_str(&id_str2, obj_id2);
3405 		if (err) {
3406 			free(obj_id2);
3407 			goto done;
3408 		}
3409 		if (pcommit) {
3410 			err = got_object_id_by_path(&obj_id1, repo,
3411 			    qid->id, path);
3412 			if (err) {
3413 				if (err->code != GOT_ERR_NO_TREE_ENTRY) {
3414 					free(obj_id2);
3415 					goto done;
3416 				}
3417 			} else {
3418 				err = got_object_id_str(&id_str1, obj_id1);
3419 				if (err) {
3420 					free(obj_id2);
3421 					goto done;
3422 				}
3423 			}
3424 		}
3425 		err = got_object_get_type(&obj_type, repo, obj_id2);
3426 		if (err) {
3427 			free(obj_id2);
3428 			goto done;
3429 		}
3430 		printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null", id_str2);
3431 		switch (obj_type) {
3432 		case GOT_OBJ_TYPE_BLOB:
3433 			err = diff_blobs(obj_id1, obj_id2, path, diff_context,
3434 			    0, 0, repo);
3435 			break;
3436 		case GOT_OBJ_TYPE_TREE:
3437 			err = diff_trees(obj_id1, obj_id2, path, diff_context,
3438 			    0, 0, repo);
3439 			break;
3440 		default:
3441 			err = got_error(GOT_ERR_OBJ_TYPE);
3442 			break;
3443 		}
3444 		free(obj_id1);
3445 		free(obj_id2);
3446 	} else {
3447 		obj_id2 = got_object_commit_get_tree_id(commit);
3448 		err = got_object_id_str(&id_str2, obj_id2);
3449 		if (err)
3450 			goto done;
3451 		if (pcommit) {
3452 			obj_id1 = got_object_commit_get_tree_id(pcommit);
3453 			err = got_object_id_str(&id_str1, obj_id1);
3454 			if (err)
3455 				goto done;
3456 		}
3457 		printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null",
3458 		    id_str2);
3459 		err = diff_trees(obj_id1, obj_id2, "", diff_context, 0, 0,
3460 		    repo);
3461 	}
3462 done:
3463 	free(id_str1);
3464 	free(id_str2);
3465 	if (pcommit)
3466 		got_object_commit_close(pcommit);
3467 	return err;
3468 }
3469 
3470 static char *
3471 get_datestr(time_t *time, char *datebuf)
3472 {
3473 	struct tm mytm, *tm;
3474 	char *p, *s;
3475 
3476 	tm = gmtime_r(time, &mytm);
3477 	if (tm == NULL)
3478 		return NULL;
3479 	s = asctime_r(tm, datebuf);
3480 	if (s == NULL)
3481 		return NULL;
3482 	p = strchr(s, '\n');
3483 	if (p)
3484 		*p = '\0';
3485 	return s;
3486 }
3487 
3488 static const struct got_error *
3489 match_logmsg(int *have_match, struct got_object_id *id,
3490     struct got_commit_object *commit, regex_t *regex)
3491 {
3492 	const struct got_error *err = NULL;
3493 	regmatch_t regmatch;
3494 	char *id_str = NULL, *logmsg = NULL;
3495 
3496 	*have_match = 0;
3497 
3498 	err = got_object_id_str(&id_str, id);
3499 	if (err)
3500 		return err;
3501 
3502 	err = got_object_commit_get_logmsg(&logmsg, commit);
3503 	if (err)
3504 		goto done;
3505 
3506 	if (regexec(regex, logmsg, 1, &regmatch, 0) == 0)
3507 		*have_match = 1;
3508 done:
3509 	free(id_str);
3510 	free(logmsg);
3511 	return err;
3512 }
3513 
3514 static void
3515 match_changed_paths(int *have_match, struct got_pathlist_head *changed_paths,
3516     regex_t *regex)
3517 {
3518 	regmatch_t regmatch;
3519 	struct got_pathlist_entry *pe;
3520 
3521 	*have_match = 0;
3522 
3523 	TAILQ_FOREACH(pe, changed_paths, entry) {
3524 		if (regexec(regex, pe->path, 1, &regmatch, 0) == 0) {
3525 			*have_match = 1;
3526 			break;
3527 		}
3528 	}
3529 }
3530 
3531 #define GOT_COMMIT_SEP_STR "-----------------------------------------------\n"
3532 
3533 static const struct got_error*
3534 build_refs_str(char **refs_str, struct got_reflist_head *refs,
3535     struct got_object_id *id, struct got_repository *repo)
3536 {
3537 	static const struct got_error *err = NULL;
3538 	struct got_reflist_entry *re;
3539 	char *s;
3540 	const char *name;
3541 
3542 	*refs_str = NULL;
3543 
3544 	TAILQ_FOREACH(re, refs, entry) {
3545 		struct got_tag_object *tag = NULL;
3546 		struct got_object_id *ref_id;
3547 		int cmp;
3548 
3549 		name = got_ref_get_name(re->ref);
3550 		if (strcmp(name, GOT_REF_HEAD) == 0)
3551 			continue;
3552 		if (strncmp(name, "refs/", 5) == 0)
3553 			name += 5;
3554 		if (strncmp(name, "got/", 4) == 0)
3555 			continue;
3556 		if (strncmp(name, "heads/", 6) == 0)
3557 			name += 6;
3558 		if (strncmp(name, "remotes/", 8) == 0) {
3559 			name += 8;
3560 			s = strstr(name, "/" GOT_REF_HEAD);
3561 			if (s != NULL && s[strlen(s)] == '\0')
3562 				continue;
3563 		}
3564 		err = got_ref_resolve(&ref_id, repo, re->ref);
3565 		if (err)
3566 			break;
3567 		if (strncmp(name, "tags/", 5) == 0) {
3568 			err = got_object_open_as_tag(&tag, repo, ref_id);
3569 			if (err) {
3570 				if (err->code != GOT_ERR_OBJ_TYPE) {
3571 					free(ref_id);
3572 					break;
3573 				}
3574 				/* Ref points at something other than a tag. */
3575 				err = NULL;
3576 				tag = NULL;
3577 			}
3578 		}
3579 		cmp = got_object_id_cmp(tag ?
3580 		    got_object_tag_get_object_id(tag) : ref_id, id);
3581 		free(ref_id);
3582 		if (tag)
3583 			got_object_tag_close(tag);
3584 		if (cmp != 0)
3585 			continue;
3586 		s = *refs_str;
3587 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
3588 		    s ? ", " : "", name) == -1) {
3589 			err = got_error_from_errno("asprintf");
3590 			free(s);
3591 			*refs_str = NULL;
3592 			break;
3593 		}
3594 		free(s);
3595 	}
3596 
3597 	return err;
3598 }
3599 
3600 static const struct got_error *
3601 print_commit(struct got_commit_object *commit, struct got_object_id *id,
3602     struct got_repository *repo, const char *path,
3603     struct got_pathlist_head *changed_paths, int show_patch,
3604     int diff_context, struct got_reflist_object_id_map *refs_idmap,
3605     const char *custom_refs_str)
3606 {
3607 	const struct got_error *err = NULL;
3608 	char *id_str, *datestr, *logmsg0, *logmsg, *line;
3609 	char datebuf[26];
3610 	time_t committer_time;
3611 	const char *author, *committer;
3612 	char *refs_str = NULL;
3613 
3614 	err = got_object_id_str(&id_str, id);
3615 	if (err)
3616 		return err;
3617 
3618 	if (custom_refs_str == NULL) {
3619 		struct got_reflist_head *refs;
3620 		refs = got_reflist_object_id_map_lookup(refs_idmap, id);
3621 		if (refs) {
3622 			err = build_refs_str(&refs_str, refs, id, repo);
3623 			if (err)
3624 				goto done;
3625 		}
3626 	}
3627 
3628 	printf(GOT_COMMIT_SEP_STR);
3629 	if (custom_refs_str)
3630 		printf("commit %s (%s)\n", id_str, custom_refs_str); 
3631 	else
3632 		printf("commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3633 		    refs_str ? refs_str : "", refs_str ? ")" : "");
3634 	free(id_str);
3635 	id_str = NULL;
3636 	free(refs_str);
3637 	refs_str = NULL;
3638 	printf("from: %s\n", got_object_commit_get_author(commit));
3639 	committer_time = got_object_commit_get_committer_time(commit);
3640 	datestr = get_datestr(&committer_time, datebuf);
3641 	if (datestr)
3642 		printf("date: %s UTC\n", datestr);
3643 	author = got_object_commit_get_author(commit);
3644 	committer = got_object_commit_get_committer(commit);
3645 	if (strcmp(author, committer) != 0)
3646 		printf("via: %s\n", committer);
3647 	if (got_object_commit_get_nparents(commit) > 1) {
3648 		const struct got_object_id_queue *parent_ids;
3649 		struct got_object_qid *qid;
3650 		int n = 1;
3651 		parent_ids = got_object_commit_get_parent_ids(commit);
3652 		SIMPLEQ_FOREACH(qid, parent_ids, entry) {
3653 			err = got_object_id_str(&id_str, qid->id);
3654 			if (err)
3655 				goto done;
3656 			printf("parent %d: %s\n", n++, id_str);
3657 			free(id_str);
3658 			id_str = NULL;
3659 		}
3660 	}
3661 
3662 	err = got_object_commit_get_logmsg(&logmsg0, commit);
3663 	if (err)
3664 		goto done;
3665 
3666 	logmsg = logmsg0;
3667 	do {
3668 		line = strsep(&logmsg, "\n");
3669 		if (line)
3670 			printf(" %s\n", line);
3671 	} while (line);
3672 	free(logmsg0);
3673 
3674 	if (changed_paths) {
3675 		struct got_pathlist_entry *pe;
3676 		TAILQ_FOREACH(pe, changed_paths, entry) {
3677 			struct got_diff_changed_path *cp = pe->data;
3678 			printf(" %c  %s\n", cp->status, pe->path);
3679 		}
3680 		printf("\n");
3681 	}
3682 	if (show_patch) {
3683 		err = print_patch(commit, id, path, diff_context, repo);
3684 		if (err == 0)
3685 			printf("\n");
3686 	}
3687 
3688 	if (fflush(stdout) != 0 && err == NULL)
3689 		err = got_error_from_errno("fflush");
3690 done:
3691 	free(id_str);
3692 	free(refs_str);
3693 	return err;
3694 }
3695 
3696 static const struct got_error *
3697 print_commits(struct got_object_id *root_id, struct got_object_id *end_id,
3698     struct got_repository *repo, const char *path, int show_changed_paths,
3699     int show_patch, const char *search_pattern, int diff_context, int limit,
3700     int log_branches, int reverse_display_order,
3701     struct got_reflist_object_id_map *refs_idmap)
3702 {
3703 	const struct got_error *err;
3704 	struct got_commit_graph *graph;
3705 	regex_t regex;
3706 	int have_match;
3707 	struct got_object_id_queue reversed_commits;
3708 	struct got_object_qid *qid;
3709 	struct got_commit_object *commit;
3710 	struct got_pathlist_head changed_paths;
3711 	struct got_pathlist_entry *pe;
3712 
3713 	SIMPLEQ_INIT(&reversed_commits);
3714 	TAILQ_INIT(&changed_paths);
3715 
3716 	if (search_pattern && regcomp(&regex, search_pattern,
3717 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE))
3718 		return got_error_msg(GOT_ERR_REGEX, search_pattern);
3719 
3720 	err = got_commit_graph_open(&graph, path, !log_branches);
3721 	if (err)
3722 		return err;
3723 	err = got_commit_graph_iter_start(graph, root_id, repo,
3724 	    check_cancelled, NULL);
3725 	if (err)
3726 		goto done;
3727 	for (;;) {
3728 		struct got_object_id *id;
3729 
3730 		if (sigint_received || sigpipe_received)
3731 			break;
3732 
3733 		err = got_commit_graph_iter_next(&id, graph, repo,
3734 		    check_cancelled, NULL);
3735 		if (err) {
3736 			if (err->code == GOT_ERR_ITER_COMPLETED)
3737 				err = NULL;
3738 			break;
3739 		}
3740 		if (id == NULL)
3741 			break;
3742 
3743 		err = got_object_open_as_commit(&commit, repo, id);
3744 		if (err)
3745 			break;
3746 
3747 		if (show_changed_paths && !reverse_display_order) {
3748 			err = get_changed_paths(&changed_paths, commit, repo);
3749 			if (err)
3750 				break;
3751 		}
3752 
3753 		if (search_pattern) {
3754 			err = match_logmsg(&have_match, id, commit, &regex);
3755 			if (err) {
3756 				got_object_commit_close(commit);
3757 				break;
3758 			}
3759 			if (have_match == 0 && show_changed_paths)
3760 				match_changed_paths(&have_match,
3761 				    &changed_paths, &regex);
3762 			if (have_match == 0) {
3763 				got_object_commit_close(commit);
3764 				TAILQ_FOREACH(pe, &changed_paths, entry) {
3765 					free((char *)pe->path);
3766 					free(pe->data);
3767 				}
3768 				got_pathlist_free(&changed_paths);
3769 				continue;
3770 			}
3771 		}
3772 
3773 		if (reverse_display_order) {
3774 			err = got_object_qid_alloc(&qid, id);
3775 			if (err)
3776 				break;
3777 			SIMPLEQ_INSERT_HEAD(&reversed_commits, qid, entry);
3778 			got_object_commit_close(commit);
3779 		} else {
3780 			err = print_commit(commit, id, repo, path,
3781 			    show_changed_paths ? &changed_paths : NULL,
3782 			    show_patch, diff_context, refs_idmap, NULL);
3783 			got_object_commit_close(commit);
3784 			if (err)
3785 				break;
3786 		}
3787 		if ((limit && --limit == 0) ||
3788 		    (end_id && got_object_id_cmp(id, end_id) == 0))
3789 			break;
3790 
3791 		TAILQ_FOREACH(pe, &changed_paths, entry) {
3792 			free((char *)pe->path);
3793 			free(pe->data);
3794 		}
3795 		got_pathlist_free(&changed_paths);
3796 	}
3797 	if (reverse_display_order) {
3798 		SIMPLEQ_FOREACH(qid, &reversed_commits, entry) {
3799 			err = got_object_open_as_commit(&commit, repo, qid->id);
3800 			if (err)
3801 				break;
3802 			if (show_changed_paths) {
3803 				err = get_changed_paths(&changed_paths,
3804 				    commit, repo);
3805 				if (err)
3806 					break;
3807 			}
3808 			err = print_commit(commit, qid->id, repo, path,
3809 			    show_changed_paths ? &changed_paths : NULL,
3810 			    show_patch, diff_context, refs_idmap, NULL);
3811 			got_object_commit_close(commit);
3812 			if (err)
3813 				break;
3814 			TAILQ_FOREACH(pe, &changed_paths, entry) {
3815 				free((char *)pe->path);
3816 				free(pe->data);
3817 			}
3818 			got_pathlist_free(&changed_paths);
3819 		}
3820 	}
3821 done:
3822 	while (!SIMPLEQ_EMPTY(&reversed_commits)) {
3823 		qid = SIMPLEQ_FIRST(&reversed_commits);
3824 		SIMPLEQ_REMOVE_HEAD(&reversed_commits, entry);
3825 		got_object_qid_free(qid);
3826 	}
3827 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3828 		free((char *)pe->path);
3829 		free(pe->data);
3830 	}
3831 	got_pathlist_free(&changed_paths);
3832 	if (search_pattern)
3833 		regfree(&regex);
3834 	got_commit_graph_close(graph);
3835 	return err;
3836 }
3837 
3838 __dead static void
3839 usage_log(void)
3840 {
3841 	fprintf(stderr, "usage: %s log [-b] [-c commit] [-C number] [ -l N ] "
3842 	    "[-p] [-P] [-x commit] [-s search-pattern] [-r repository-path] "
3843 	    "[-R] [path]\n", getprogname());
3844 	exit(1);
3845 }
3846 
3847 static int
3848 get_default_log_limit(void)
3849 {
3850 	const char *got_default_log_limit;
3851 	long long n;
3852 	const char *errstr;
3853 
3854 	got_default_log_limit = getenv("GOT_LOG_DEFAULT_LIMIT");
3855 	if (got_default_log_limit == NULL)
3856 		return 0;
3857 	n = strtonum(got_default_log_limit, 0, INT_MAX, &errstr);
3858 	if (errstr != NULL)
3859 		return 0;
3860 	return n;
3861 }
3862 
3863 static const struct got_error *
3864 cmd_log(int argc, char *argv[])
3865 {
3866 	const struct got_error *error;
3867 	struct got_repository *repo = NULL;
3868 	struct got_worktree *worktree = NULL;
3869 	struct got_object_id *start_id = NULL, *end_id = NULL;
3870 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
3871 	const char *start_commit = NULL, *end_commit = NULL;
3872 	const char *search_pattern = NULL;
3873 	int diff_context = -1, ch;
3874 	int show_changed_paths = 0, show_patch = 0, limit = 0, log_branches = 0;
3875 	int reverse_display_order = 0;
3876 	const char *errstr;
3877 	struct got_reflist_head refs;
3878 	struct got_reflist_object_id_map *refs_idmap = NULL;
3879 
3880 	TAILQ_INIT(&refs);
3881 
3882 #ifndef PROFILE
3883 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
3884 	    NULL)
3885 	    == -1)
3886 		err(1, "pledge");
3887 #endif
3888 
3889 	limit = get_default_log_limit();
3890 
3891 	while ((ch = getopt(argc, argv, "bpPc:C:l:r:Rs:x:")) != -1) {
3892 		switch (ch) {
3893 		case 'p':
3894 			show_patch = 1;
3895 			break;
3896 		case 'P':
3897 			show_changed_paths = 1;
3898 			break;
3899 		case 'c':
3900 			start_commit = optarg;
3901 			break;
3902 		case 'C':
3903 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
3904 			    &errstr);
3905 			if (errstr != NULL)
3906 				err(1, "-C option %s", errstr);
3907 			break;
3908 		case 'l':
3909 			limit = strtonum(optarg, 0, INT_MAX, &errstr);
3910 			if (errstr != NULL)
3911 				err(1, "-l option %s", errstr);
3912 			break;
3913 		case 'b':
3914 			log_branches = 1;
3915 			break;
3916 		case 'r':
3917 			repo_path = realpath(optarg, NULL);
3918 			if (repo_path == NULL)
3919 				return got_error_from_errno2("realpath",
3920 				    optarg);
3921 			got_path_strip_trailing_slashes(repo_path);
3922 			break;
3923 		case 'R':
3924 			reverse_display_order = 1;
3925 			break;
3926 		case 's':
3927 			search_pattern = optarg;
3928 			break;
3929 		case 'x':
3930 			end_commit = optarg;
3931 			break;
3932 		default:
3933 			usage_log();
3934 			/* NOTREACHED */
3935 		}
3936 	}
3937 
3938 	argc -= optind;
3939 	argv += optind;
3940 
3941 	if (diff_context == -1)
3942 		diff_context = 3;
3943 	else if (!show_patch)
3944 		errx(1, "-C requires -p");
3945 
3946 	cwd = getcwd(NULL, 0);
3947 	if (cwd == NULL) {
3948 		error = got_error_from_errno("getcwd");
3949 		goto done;
3950 	}
3951 
3952 	if (repo_path == NULL) {
3953 		error = got_worktree_open(&worktree, cwd);
3954 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3955 			goto done;
3956 		error = NULL;
3957 	}
3958 
3959 	if (argc == 1) {
3960 		if (worktree) {
3961 			error = got_worktree_resolve_path(&path, worktree,
3962 			    argv[0]);
3963 			if (error)
3964 				goto done;
3965 		} else {
3966 			path = strdup(argv[0]);
3967 			if (path == NULL) {
3968 				error = got_error_from_errno("strdup");
3969 				goto done;
3970 			}
3971 		}
3972 	} else if (argc != 0)
3973 		usage_log();
3974 
3975 	if (repo_path == NULL) {
3976 		repo_path = worktree ?
3977 		    strdup(got_worktree_get_repo_path(worktree)) : strdup(cwd);
3978 	}
3979 	if (repo_path == NULL) {
3980 		error = got_error_from_errno("strdup");
3981 		goto done;
3982 	}
3983 
3984 	error = got_repo_open(&repo, repo_path, NULL);
3985 	if (error != NULL)
3986 		goto done;
3987 
3988 	error = apply_unveil(got_repo_get_path(repo), 1,
3989 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3990 	if (error)
3991 		goto done;
3992 
3993 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
3994 	if (error)
3995 		goto done;
3996 
3997 	error = got_reflist_object_id_map_create(&refs_idmap, &refs, repo);
3998 	if (error)
3999 		goto done;
4000 
4001 	if (start_commit == NULL) {
4002 		struct got_reference *head_ref;
4003 		struct got_commit_object *commit = NULL;
4004 		error = got_ref_open(&head_ref, repo,
4005 		    worktree ? got_worktree_get_head_ref_name(worktree)
4006 		    : GOT_REF_HEAD, 0);
4007 		if (error != NULL)
4008 			goto done;
4009 		error = got_ref_resolve(&start_id, repo, head_ref);
4010 		got_ref_close(head_ref);
4011 		if (error != NULL)
4012 			goto done;
4013 		error = got_object_open_as_commit(&commit, repo,
4014 		    start_id);
4015 		if (error != NULL)
4016 			goto done;
4017 		got_object_commit_close(commit);
4018 	} else {
4019 		error = got_repo_match_object_id(&start_id, NULL,
4020 		    start_commit, GOT_OBJ_TYPE_COMMIT, &refs, repo);
4021 		if (error != NULL)
4022 			goto done;
4023 	}
4024 	if (end_commit != NULL) {
4025 		error = got_repo_match_object_id(&end_id, NULL,
4026 		    end_commit, GOT_OBJ_TYPE_COMMIT, &refs, repo);
4027 		if (error != NULL)
4028 			goto done;
4029 	}
4030 
4031 	if (worktree) {
4032 		/*
4033 		 * If a path was specified on the command line it was resolved
4034 		 * to a path in the work tree above. Prepend the work tree's
4035 		 * path prefix to obtain the corresponding in-repository path.
4036 		 */
4037 		if (path) {
4038 			const char *prefix;
4039 			prefix = got_worktree_get_path_prefix(worktree);
4040 			if (asprintf(&in_repo_path, "%s%s%s", prefix,
4041 			    (path[0] != '\0') ? "/" : "", path) == -1) {
4042 				error = got_error_from_errno("asprintf");
4043 				goto done;
4044 			}
4045 		}
4046 	} else
4047 		error = got_repo_map_path(&in_repo_path, repo,
4048 		    path ? path : "");
4049 	if (error != NULL)
4050 		goto done;
4051 	if (in_repo_path) {
4052 		free(path);
4053 		path = in_repo_path;
4054 	}
4055 
4056 	error = print_commits(start_id, end_id, repo, path ? path : "",
4057 	    show_changed_paths, show_patch, search_pattern, diff_context,
4058 	    limit, log_branches, reverse_display_order, refs_idmap);
4059 done:
4060 	free(path);
4061 	free(repo_path);
4062 	free(cwd);
4063 	if (worktree)
4064 		got_worktree_close(worktree);
4065 	if (repo) {
4066 		const struct got_error *repo_error;
4067 		repo_error = got_repo_close(repo);
4068 		if (error == NULL)
4069 			error = repo_error;
4070 	}
4071 	if (refs_idmap)
4072 		got_reflist_object_id_map_free(refs_idmap);
4073 	got_ref_list_free(&refs);
4074 	return error;
4075 }
4076 
4077 __dead static void
4078 usage_diff(void)
4079 {
4080 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
4081 	    "[-s] [-w] [object1 object2 | path]\n", getprogname());
4082 	exit(1);
4083 }
4084 
4085 struct print_diff_arg {
4086 	struct got_repository *repo;
4087 	struct got_worktree *worktree;
4088 	int diff_context;
4089 	const char *id_str;
4090 	int header_shown;
4091 	int diff_staged;
4092 	int ignore_whitespace;
4093 	int force_text_diff;
4094 };
4095 
4096 /*
4097  * Create a file which contains the target path of a symlink so we can feed
4098  * it as content to the diff engine.
4099  */
4100 static const struct got_error *
4101 get_symlink_target_file(int *fd, int dirfd, const char *de_name,
4102     const char *abspath)
4103 {
4104 	const struct got_error *err = NULL;
4105 	char target_path[PATH_MAX];
4106 	ssize_t target_len, outlen;
4107 
4108 	*fd = -1;
4109 
4110 	if (dirfd != -1) {
4111 		target_len = readlinkat(dirfd, de_name, target_path, PATH_MAX);
4112 		if (target_len == -1)
4113 			return got_error_from_errno2("readlinkat", abspath);
4114 	} else {
4115 		target_len = readlink(abspath, target_path, PATH_MAX);
4116 		if (target_len == -1)
4117 			return got_error_from_errno2("readlink", abspath);
4118 	}
4119 
4120 	*fd = got_opentempfd();
4121 	if (*fd == -1)
4122 		return got_error_from_errno("got_opentempfd");
4123 
4124 	outlen = write(*fd, target_path, target_len);
4125 	if (outlen == -1) {
4126 		err = got_error_from_errno("got_opentempfd");
4127 		goto done;
4128 	}
4129 
4130 	if (lseek(*fd, 0, SEEK_SET) == -1) {
4131 		err = got_error_from_errno2("lseek", abspath);
4132 		goto done;
4133 	}
4134 done:
4135 	if (err) {
4136 		close(*fd);
4137 		*fd = -1;
4138 	}
4139 	return err;
4140 }
4141 
4142 static const struct got_error *
4143 print_diff(void *arg, unsigned char status, unsigned char staged_status,
4144     const char *path, struct got_object_id *blob_id,
4145     struct got_object_id *staged_blob_id, struct got_object_id *commit_id,
4146     int dirfd, const char *de_name)
4147 {
4148 	struct print_diff_arg *a = arg;
4149 	const struct got_error *err = NULL;
4150 	struct got_blob_object *blob1 = NULL;
4151 	int fd = -1;
4152 	FILE *f2 = NULL;
4153 	char *abspath = NULL, *label1 = NULL;
4154 	struct stat sb;
4155 
4156 	if (a->diff_staged) {
4157 		if (staged_status != GOT_STATUS_MODIFY &&
4158 		    staged_status != GOT_STATUS_ADD &&
4159 		    staged_status != GOT_STATUS_DELETE)
4160 			return NULL;
4161 	} else {
4162 		if (staged_status == GOT_STATUS_DELETE)
4163 			return NULL;
4164 		if (status == GOT_STATUS_NONEXISTENT)
4165 			return got_error_set_errno(ENOENT, path);
4166 		if (status != GOT_STATUS_MODIFY &&
4167 		    status != GOT_STATUS_ADD &&
4168 		    status != GOT_STATUS_DELETE &&
4169 		    status != GOT_STATUS_CONFLICT)
4170 			return NULL;
4171 	}
4172 
4173 	if (!a->header_shown) {
4174 		printf("diff %s %s%s\n", a->id_str,
4175 		    got_worktree_get_root_path(a->worktree),
4176 		    a->diff_staged ? " (staged changes)" : "");
4177 		a->header_shown = 1;
4178 	}
4179 
4180 	if (a->diff_staged) {
4181 		const char *label1 = NULL, *label2 = NULL;
4182 		switch (staged_status) {
4183 		case GOT_STATUS_MODIFY:
4184 			label1 = path;
4185 			label2 = path;
4186 			break;
4187 		case GOT_STATUS_ADD:
4188 			label2 = path;
4189 			break;
4190 		case GOT_STATUS_DELETE:
4191 			label1 = path;
4192 			break;
4193 		default:
4194 			return got_error(GOT_ERR_FILE_STATUS);
4195 		}
4196 		return got_diff_objects_as_blobs(NULL, NULL, blob_id,
4197 		    staged_blob_id, label1, label2, a->diff_context,
4198 		    a->ignore_whitespace, a->force_text_diff, a->repo, stdout);
4199 	}
4200 
4201 	if (staged_status == GOT_STATUS_ADD ||
4202 	    staged_status == GOT_STATUS_MODIFY) {
4203 		char *id_str;
4204 		err = got_object_open_as_blob(&blob1, a->repo, staged_blob_id,
4205 		    8192);
4206 		if (err)
4207 			goto done;
4208 		err = got_object_id_str(&id_str, staged_blob_id);
4209 		if (err)
4210 			goto done;
4211 		if (asprintf(&label1, "%s (staged)", id_str) == -1) {
4212 			err = got_error_from_errno("asprintf");
4213 			free(id_str);
4214 			goto done;
4215 		}
4216 		free(id_str);
4217 	} else if (status != GOT_STATUS_ADD) {
4218 		err = got_object_open_as_blob(&blob1, a->repo, blob_id, 8192);
4219 		if (err)
4220 			goto done;
4221 	}
4222 
4223 	if (status != GOT_STATUS_DELETE) {
4224 		if (asprintf(&abspath, "%s/%s",
4225 		    got_worktree_get_root_path(a->worktree), path) == -1) {
4226 			err = got_error_from_errno("asprintf");
4227 			goto done;
4228 		}
4229 
4230 		if (dirfd != -1) {
4231 			fd = openat(dirfd, de_name, O_RDONLY | O_NOFOLLOW);
4232 			if (fd == -1) {
4233 				if (errno != ELOOP) {
4234 					err = got_error_from_errno2("openat",
4235 					    abspath);
4236 					goto done;
4237 				}
4238 				err = get_symlink_target_file(&fd, dirfd,
4239 				    de_name, abspath);
4240 				if (err)
4241 					goto done;
4242 			}
4243 		} else {
4244 			fd = open(abspath, O_RDONLY | O_NOFOLLOW);
4245 			if (fd == -1) {
4246 				if (errno != ELOOP) {
4247 					err = got_error_from_errno2("open",
4248 					    abspath);
4249 					goto done;
4250 				}
4251 				err = get_symlink_target_file(&fd, dirfd,
4252 				    de_name, abspath);
4253 				if (err)
4254 					goto done;
4255 			}
4256 		}
4257 		if (fstat(fd, &sb) == -1) {
4258 			err = got_error_from_errno2("fstat", abspath);
4259 			goto done;
4260 		}
4261 		f2 = fdopen(fd, "r");
4262 		if (f2 == NULL) {
4263 			err = got_error_from_errno2("fdopen", abspath);
4264 			goto done;
4265 		}
4266 		fd = -1;
4267 	} else
4268 		sb.st_size = 0;
4269 
4270 	err = got_diff_blob_file(blob1, label1, f2, sb.st_size, path,
4271 	    a->diff_context, a->ignore_whitespace, a->force_text_diff, stdout);
4272 done:
4273 	if (blob1)
4274 		got_object_blob_close(blob1);
4275 	if (f2 && fclose(f2) == EOF && err == NULL)
4276 		err = got_error_from_errno("fclose");
4277 	if (fd != -1 && close(fd) == -1 && err == NULL)
4278 		err = got_error_from_errno("close");
4279 	free(abspath);
4280 	return err;
4281 }
4282 
4283 static const struct got_error *
4284 cmd_diff(int argc, char *argv[])
4285 {
4286 	const struct got_error *error;
4287 	struct got_repository *repo = NULL;
4288 	struct got_worktree *worktree = NULL;
4289 	char *cwd = NULL, *repo_path = NULL;
4290 	struct got_object_id *id1 = NULL, *id2 = NULL;
4291 	const char *id_str1 = NULL, *id_str2 = NULL;
4292 	char *label1 = NULL, *label2 = NULL;
4293 	int type1, type2;
4294 	int diff_context = 3, diff_staged = 0, ignore_whitespace = 0, ch;
4295 	int force_text_diff = 0;
4296 	const char *errstr;
4297 	char *path = NULL;
4298 	struct got_reflist_head refs;
4299 
4300 	TAILQ_INIT(&refs);
4301 
4302 #ifndef PROFILE
4303 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
4304 	    NULL) == -1)
4305 		err(1, "pledge");
4306 #endif
4307 
4308 	while ((ch = getopt(argc, argv, "aC:r:sw")) != -1) {
4309 		switch (ch) {
4310 		case 'a':
4311 			force_text_diff = 1;
4312 			break;
4313 		case 'C':
4314 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4315 			    &errstr);
4316 			if (errstr != NULL)
4317 				err(1, "-C option %s", errstr);
4318 			break;
4319 		case 'r':
4320 			repo_path = realpath(optarg, NULL);
4321 			if (repo_path == NULL)
4322 				return got_error_from_errno2("realpath",
4323 				    optarg);
4324 			got_path_strip_trailing_slashes(repo_path);
4325 			break;
4326 		case 's':
4327 			diff_staged = 1;
4328 			break;
4329 		case 'w':
4330 			ignore_whitespace = 1;
4331 			break;
4332 		default:
4333 			usage_diff();
4334 			/* NOTREACHED */
4335 		}
4336 	}
4337 
4338 	argc -= optind;
4339 	argv += optind;
4340 
4341 	cwd = getcwd(NULL, 0);
4342 	if (cwd == NULL) {
4343 		error = got_error_from_errno("getcwd");
4344 		goto done;
4345 	}
4346 	if (argc <= 1) {
4347 		if (repo_path)
4348 			errx(1,
4349 			    "-r option can't be used when diffing a work tree");
4350 		error = got_worktree_open(&worktree, cwd);
4351 		if (error) {
4352 			if (error->code == GOT_ERR_NOT_WORKTREE)
4353 				error = wrap_not_worktree_error(error, "diff",
4354 				    cwd);
4355 			goto done;
4356 		}
4357 		repo_path = strdup(got_worktree_get_repo_path(worktree));
4358 		if (repo_path == NULL) {
4359 			error = got_error_from_errno("strdup");
4360 			goto done;
4361 		}
4362 		if (argc == 1) {
4363 			error = got_worktree_resolve_path(&path, worktree,
4364 			    argv[0]);
4365 			if (error)
4366 				goto done;
4367 		} else {
4368 			path = strdup("");
4369 			if (path == NULL) {
4370 				error = got_error_from_errno("strdup");
4371 				goto done;
4372 			}
4373 		}
4374 	} else if (argc == 2) {
4375 		if (diff_staged)
4376 			errx(1, "-s option can't be used when diffing "
4377 			    "objects in repository");
4378 		id_str1 = argv[0];
4379 		id_str2 = argv[1];
4380 		if (repo_path == NULL) {
4381 			error = got_worktree_open(&worktree, cwd);
4382 			if (error && error->code != GOT_ERR_NOT_WORKTREE)
4383 				goto done;
4384 			repo_path = strdup(worktree ?
4385 			    got_worktree_get_repo_path(worktree) : cwd);
4386 			if (repo_path == NULL) {
4387 				error = got_error_from_errno("strdup");
4388 				goto done;
4389 			}
4390 		}
4391 	} else
4392 		usage_diff();
4393 
4394 	error = got_repo_open(&repo, repo_path, NULL);
4395 	free(repo_path);
4396 	if (error != NULL)
4397 		goto done;
4398 
4399 	error = apply_unveil(got_repo_get_path(repo), 1,
4400 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
4401 	if (error)
4402 		goto done;
4403 
4404 	if (argc <= 1) {
4405 		struct print_diff_arg arg;
4406 		struct got_pathlist_head paths;
4407 		char *id_str;
4408 
4409 		TAILQ_INIT(&paths);
4410 
4411 		error = got_object_id_str(&id_str,
4412 		    got_worktree_get_base_commit_id(worktree));
4413 		if (error)
4414 			goto done;
4415 		arg.repo = repo;
4416 		arg.worktree = worktree;
4417 		arg.diff_context = diff_context;
4418 		arg.id_str = id_str;
4419 		arg.header_shown = 0;
4420 		arg.diff_staged = diff_staged;
4421 		arg.ignore_whitespace = ignore_whitespace;
4422 		arg.force_text_diff = force_text_diff;
4423 
4424 		error = got_pathlist_append(&paths, path, NULL);
4425 		if (error)
4426 			goto done;
4427 
4428 		error = got_worktree_status(worktree, &paths, repo, print_diff,
4429 		    &arg, check_cancelled, NULL);
4430 		free(id_str);
4431 		got_pathlist_free(&paths);
4432 		goto done;
4433 	}
4434 
4435 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
4436 	if (error)
4437 		return error;
4438 
4439 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4440 	    GOT_OBJ_TYPE_ANY, &refs, repo);
4441 	if (error)
4442 		goto done;
4443 
4444 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4445 	    GOT_OBJ_TYPE_ANY, &refs, repo);
4446 	if (error)
4447 		goto done;
4448 
4449 	error = got_object_get_type(&type1, repo, id1);
4450 	if (error)
4451 		goto done;
4452 
4453 	error = got_object_get_type(&type2, repo, id2);
4454 	if (error)
4455 		goto done;
4456 
4457 	if (type1 != type2) {
4458 		error = got_error(GOT_ERR_OBJ_TYPE);
4459 		goto done;
4460 	}
4461 
4462 	switch (type1) {
4463 	case GOT_OBJ_TYPE_BLOB:
4464 		error = got_diff_objects_as_blobs(NULL, NULL, id1, id2,
4465 		    NULL, NULL, diff_context, ignore_whitespace,
4466 		    force_text_diff, repo, stdout);
4467 		break;
4468 	case GOT_OBJ_TYPE_TREE:
4469 		error = got_diff_objects_as_trees(NULL, NULL, id1, id2,
4470 		    "", "", diff_context, ignore_whitespace, force_text_diff,
4471 		    repo, stdout);
4472 		break;
4473 	case GOT_OBJ_TYPE_COMMIT:
4474 		printf("diff %s %s\n", label1, label2);
4475 		error = got_diff_objects_as_commits(NULL, NULL, id1, id2,
4476 		    diff_context, ignore_whitespace, force_text_diff, repo,
4477 		    stdout);
4478 		break;
4479 	default:
4480 		error = got_error(GOT_ERR_OBJ_TYPE);
4481 	}
4482 done:
4483 	free(label1);
4484 	free(label2);
4485 	free(id1);
4486 	free(id2);
4487 	free(path);
4488 	if (worktree)
4489 		got_worktree_close(worktree);
4490 	if (repo) {
4491 		const struct got_error *repo_error;
4492 		repo_error = got_repo_close(repo);
4493 		if (error == NULL)
4494 			error = repo_error;
4495 	}
4496 	got_ref_list_free(&refs);
4497 	return error;
4498 }
4499 
4500 __dead static void
4501 usage_blame(void)
4502 {
4503 	fprintf(stderr,
4504 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4505 	    getprogname());
4506 	exit(1);
4507 }
4508 
4509 struct blame_line {
4510 	int annotated;
4511 	char *id_str;
4512 	char *committer;
4513 	char datebuf[11]; /* YYYY-MM-DD + NUL */
4514 };
4515 
4516 struct blame_cb_args {
4517 	struct blame_line *lines;
4518 	int nlines;
4519 	int nlines_prec;
4520 	int lineno_cur;
4521 	off_t *line_offsets;
4522 	FILE *f;
4523 	struct got_repository *repo;
4524 };
4525 
4526 static const struct got_error *
4527 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
4528 {
4529 	const struct got_error *err = NULL;
4530 	struct blame_cb_args *a = arg;
4531 	struct blame_line *bline;
4532 	char *line = NULL;
4533 	size_t linesize = 0;
4534 	struct got_commit_object *commit = NULL;
4535 	off_t offset;
4536 	struct tm tm;
4537 	time_t committer_time;
4538 
4539 	if (nlines != a->nlines ||
4540 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4541 		return got_error(GOT_ERR_RANGE);
4542 
4543 	if (sigint_received)
4544 		return got_error(GOT_ERR_ITER_COMPLETED);
4545 
4546 	if (lineno == -1)
4547 		return NULL; /* no change in this commit */
4548 
4549 	/* Annotate this line. */
4550 	bline = &a->lines[lineno - 1];
4551 	if (bline->annotated)
4552 		return NULL;
4553 	err = got_object_id_str(&bline->id_str, id);
4554 	if (err)
4555 		return err;
4556 
4557 	err = got_object_open_as_commit(&commit, a->repo, id);
4558 	if (err)
4559 		goto done;
4560 
4561 	bline->committer = strdup(got_object_commit_get_committer(commit));
4562 	if (bline->committer == NULL) {
4563 		err = got_error_from_errno("strdup");
4564 		goto done;
4565 	}
4566 
4567 	committer_time = got_object_commit_get_committer_time(commit);
4568 	if (localtime_r(&committer_time, &tm) == NULL)
4569 		return got_error_from_errno("localtime_r");
4570 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
4571 	    &tm) == 0) {
4572 		err = got_error(GOT_ERR_NO_SPACE);
4573 		goto done;
4574 	}
4575 	bline->annotated = 1;
4576 
4577 	/* Print lines annotated so far. */
4578 	bline = &a->lines[a->lineno_cur - 1];
4579 	if (!bline->annotated)
4580 		goto done;
4581 
4582 	offset = a->line_offsets[a->lineno_cur - 1];
4583 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
4584 		err = got_error_from_errno("fseeko");
4585 		goto done;
4586 	}
4587 
4588 	while (bline->annotated) {
4589 		char *smallerthan, *at, *nl, *committer;
4590 		size_t len;
4591 
4592 		if (getline(&line, &linesize, a->f) == -1) {
4593 			if (ferror(a->f))
4594 				err = got_error_from_errno("getline");
4595 			break;
4596 		}
4597 
4598 		committer = bline->committer;
4599 		smallerthan = strchr(committer, '<');
4600 		if (smallerthan && smallerthan[1] != '\0')
4601 			committer = smallerthan + 1;
4602 		at = strchr(committer, '@');
4603 		if (at)
4604 			*at = '\0';
4605 		len = strlen(committer);
4606 		if (len >= 9)
4607 			committer[8] = '\0';
4608 
4609 		nl = strchr(line, '\n');
4610 		if (nl)
4611 			*nl = '\0';
4612 		printf("%.*d) %.8s %s %-8s %s\n", a->nlines_prec, a->lineno_cur,
4613 		    bline->id_str, bline->datebuf, committer, line);
4614 
4615 		a->lineno_cur++;
4616 		bline = &a->lines[a->lineno_cur - 1];
4617 	}
4618 done:
4619 	if (commit)
4620 		got_object_commit_close(commit);
4621 	free(line);
4622 	return err;
4623 }
4624 
4625 static const struct got_error *
4626 cmd_blame(int argc, char *argv[])
4627 {
4628 	const struct got_error *error;
4629 	struct got_repository *repo = NULL;
4630 	struct got_worktree *worktree = NULL;
4631 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4632 	char *link_target = NULL;
4633 	struct got_object_id *obj_id = NULL;
4634 	struct got_object_id *commit_id = NULL;
4635 	struct got_blob_object *blob = NULL;
4636 	char *commit_id_str = NULL;
4637 	struct blame_cb_args bca;
4638 	int ch, obj_type, i;
4639 	off_t filesize;
4640 
4641 	memset(&bca, 0, sizeof(bca));
4642 
4643 #ifndef PROFILE
4644 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
4645 	    NULL) == -1)
4646 		err(1, "pledge");
4647 #endif
4648 
4649 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
4650 		switch (ch) {
4651 		case 'c':
4652 			commit_id_str = optarg;
4653 			break;
4654 		case 'r':
4655 			repo_path = realpath(optarg, NULL);
4656 			if (repo_path == NULL)
4657 				return got_error_from_errno2("realpath",
4658 				    optarg);
4659 			got_path_strip_trailing_slashes(repo_path);
4660 			break;
4661 		default:
4662 			usage_blame();
4663 			/* NOTREACHED */
4664 		}
4665 	}
4666 
4667 	argc -= optind;
4668 	argv += optind;
4669 
4670 	if (argc == 1)
4671 		path = argv[0];
4672 	else
4673 		usage_blame();
4674 
4675 	cwd = getcwd(NULL, 0);
4676 	if (cwd == NULL) {
4677 		error = got_error_from_errno("getcwd");
4678 		goto done;
4679 	}
4680 	if (repo_path == NULL) {
4681 		error = got_worktree_open(&worktree, cwd);
4682 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4683 			goto done;
4684 		else
4685 			error = NULL;
4686 		if (worktree) {
4687 			repo_path =
4688 			    strdup(got_worktree_get_repo_path(worktree));
4689 			if (repo_path == NULL) {
4690 				error = got_error_from_errno("strdup");
4691 				if (error)
4692 					goto done;
4693 			}
4694 		} else {
4695 			repo_path = strdup(cwd);
4696 			if (repo_path == NULL) {
4697 				error = got_error_from_errno("strdup");
4698 				goto done;
4699 			}
4700 		}
4701 	}
4702 
4703 	error = got_repo_open(&repo, repo_path, NULL);
4704 	if (error != NULL)
4705 		goto done;
4706 
4707 	if (worktree) {
4708 		const char *prefix = got_worktree_get_path_prefix(worktree);
4709 		char *p;
4710 
4711 		error = got_worktree_resolve_path(&p, worktree, path);
4712 		if (error)
4713 			goto done;
4714 		if (asprintf(&in_repo_path, "%s%s%s", prefix,
4715 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
4716 		    p) == -1) {
4717 			error = got_error_from_errno("asprintf");
4718 			free(p);
4719 			goto done;
4720 		}
4721 		free(p);
4722 		error = apply_unveil(got_repo_get_path(repo), 1, NULL);
4723 	} else {
4724 		error = apply_unveil(got_repo_get_path(repo), 1, NULL);
4725 		if (error)
4726 			goto done;
4727 		error = got_repo_map_path(&in_repo_path, repo, path);
4728 	}
4729 	if (error)
4730 		goto done;
4731 
4732 	if (commit_id_str == NULL) {
4733 		struct got_reference *head_ref;
4734 		error = got_ref_open(&head_ref, repo, worktree ?
4735 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
4736 		if (error != NULL)
4737 			goto done;
4738 		error = got_ref_resolve(&commit_id, repo, head_ref);
4739 		got_ref_close(head_ref);
4740 		if (error != NULL)
4741 			goto done;
4742 	} else {
4743 		struct got_reflist_head refs;
4744 		TAILQ_INIT(&refs);
4745 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
4746 		    NULL);
4747 		if (error)
4748 			goto done;
4749 		error = got_repo_match_object_id(&commit_id, NULL,
4750 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &refs, repo);
4751 		got_ref_list_free(&refs);
4752 		if (error)
4753 			goto done;
4754 	}
4755 
4756 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
4757 	    commit_id, repo);
4758 	if (error)
4759 		goto done;
4760 
4761 	error = got_object_id_by_path(&obj_id, repo, commit_id,
4762 	    link_target ? link_target : in_repo_path);
4763 	if (error)
4764 		goto done;
4765 
4766 	error = got_object_get_type(&obj_type, repo, obj_id);
4767 	if (error)
4768 		goto done;
4769 
4770 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4771 		error = got_error_path(link_target ? link_target : in_repo_path,
4772 		    GOT_ERR_OBJ_TYPE);
4773 		goto done;
4774 	}
4775 
4776 	error = got_object_open_as_blob(&blob, repo, obj_id, 8192);
4777 	if (error)
4778 		goto done;
4779 	bca.f = got_opentemp();
4780 	if (bca.f == NULL) {
4781 		error = got_error_from_errno("got_opentemp");
4782 		goto done;
4783 	}
4784 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
4785 	    &bca.line_offsets, bca.f, blob);
4786 	if (error || bca.nlines == 0)
4787 		goto done;
4788 
4789 	/* Don't include \n at EOF in the blame line count. */
4790 	if (bca.line_offsets[bca.nlines - 1] == filesize)
4791 		bca.nlines--;
4792 
4793 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
4794 	if (bca.lines == NULL) {
4795 		error = got_error_from_errno("calloc");
4796 		goto done;
4797 	}
4798 	bca.lineno_cur = 1;
4799 	bca.nlines_prec = 0;
4800 	i = bca.nlines;
4801 	while (i > 0) {
4802 		i /= 10;
4803 		bca.nlines_prec++;
4804 	}
4805 	bca.repo = repo;
4806 
4807 	error = got_blame(link_target ? link_target : in_repo_path, commit_id,
4808 	    repo, blame_cb, &bca, check_cancelled, NULL);
4809 done:
4810 	free(in_repo_path);
4811 	free(link_target);
4812 	free(repo_path);
4813 	free(cwd);
4814 	free(commit_id);
4815 	free(obj_id);
4816 	if (blob)
4817 		got_object_blob_close(blob);
4818 	if (worktree)
4819 		got_worktree_close(worktree);
4820 	if (repo) {
4821 		const struct got_error *repo_error;
4822 		repo_error = got_repo_close(repo);
4823 		if (error == NULL)
4824 			error = repo_error;
4825 	}
4826 	if (bca.lines) {
4827 		for (i = 0; i < bca.nlines; i++) {
4828 			struct blame_line *bline = &bca.lines[i];
4829 			free(bline->id_str);
4830 			free(bline->committer);
4831 		}
4832 		free(bca.lines);
4833 	}
4834 	free(bca.line_offsets);
4835 	if (bca.f && fclose(bca.f) == EOF && error == NULL)
4836 		error = got_error_from_errno("fclose");
4837 	return error;
4838 }
4839 
4840 __dead static void
4841 usage_tree(void)
4842 {
4843 	fprintf(stderr,
4844 	    "usage: %s tree [-c commit] [-r repository-path] [-iR] [path]\n",
4845 	    getprogname());
4846 	exit(1);
4847 }
4848 
4849 static const struct got_error *
4850 print_entry(struct got_tree_entry *te, const char *id, const char *path,
4851     const char *root_path, struct got_repository *repo)
4852 {
4853 	const struct got_error *err = NULL;
4854 	int is_root_path = (strcmp(path, root_path) == 0);
4855 	const char *modestr = "";
4856 	mode_t mode = got_tree_entry_get_mode(te);
4857 	char *link_target = NULL;
4858 
4859 	path += strlen(root_path);
4860 	while (path[0] == '/')
4861 		path++;
4862 
4863 	if (got_object_tree_entry_is_submodule(te))
4864 		modestr = "$";
4865 	else if (S_ISLNK(mode)) {
4866 		int i;
4867 
4868 		err = got_tree_entry_get_symlink_target(&link_target, te, repo);
4869 		if (err)
4870 			return err;
4871 		for (i = 0; i < strlen(link_target); i++) {
4872 			if (!isprint((unsigned char)link_target[i]))
4873 				link_target[i] = '?';
4874 		}
4875 
4876 		modestr = "@";
4877 	}
4878 	else if (S_ISDIR(mode))
4879 		modestr = "/";
4880 	else if (mode & S_IXUSR)
4881 		modestr = "*";
4882 
4883 	printf("%s%s%s%s%s%s%s\n", id ? id : "", path,
4884 	    is_root_path ? "" : "/", got_tree_entry_get_name(te), modestr,
4885 	    link_target ? " -> ": "", link_target ? link_target : "");
4886 
4887 	free(link_target);
4888 	return NULL;
4889 }
4890 
4891 static const struct got_error *
4892 print_tree(const char *path, struct got_object_id *commit_id,
4893     int show_ids, int recurse, const char *root_path,
4894     struct got_repository *repo)
4895 {
4896 	const struct got_error *err = NULL;
4897 	struct got_object_id *tree_id = NULL;
4898 	struct got_tree_object *tree = NULL;
4899 	int nentries, i;
4900 
4901 	err = got_object_id_by_path(&tree_id, repo, commit_id, path);
4902 	if (err)
4903 		goto done;
4904 
4905 	err = got_object_open_as_tree(&tree, repo, tree_id);
4906 	if (err)
4907 		goto done;
4908 	nentries = got_object_tree_get_nentries(tree);
4909 	for (i = 0; i < nentries; i++) {
4910 		struct got_tree_entry *te;
4911 		char *id = NULL;
4912 
4913 		if (sigint_received || sigpipe_received)
4914 			break;
4915 
4916 		te = got_object_tree_get_entry(tree, i);
4917 		if (show_ids) {
4918 			char *id_str;
4919 			err = got_object_id_str(&id_str,
4920 			    got_tree_entry_get_id(te));
4921 			if (err)
4922 				goto done;
4923 			if (asprintf(&id, "%s ", id_str) == -1) {
4924 				err = got_error_from_errno("asprintf");
4925 				free(id_str);
4926 				goto done;
4927 			}
4928 			free(id_str);
4929 		}
4930 		err = print_entry(te, id, path, root_path, repo);
4931 		free(id);
4932 		if (err)
4933 			goto done;
4934 
4935 		if (recurse && S_ISDIR(got_tree_entry_get_mode(te))) {
4936 			char *child_path;
4937 			if (asprintf(&child_path, "%s%s%s", path,
4938 			    path[0] == '/' && path[1] == '\0' ? "" : "/",
4939 			    got_tree_entry_get_name(te)) == -1) {
4940 				err = got_error_from_errno("asprintf");
4941 				goto done;
4942 			}
4943 			err = print_tree(child_path, commit_id, show_ids, 1,
4944 			    root_path, repo);
4945 			free(child_path);
4946 			if (err)
4947 				goto done;
4948 		}
4949 	}
4950 done:
4951 	if (tree)
4952 		got_object_tree_close(tree);
4953 	free(tree_id);
4954 	return err;
4955 }
4956 
4957 static const struct got_error *
4958 cmd_tree(int argc, char *argv[])
4959 {
4960 	const struct got_error *error;
4961 	struct got_repository *repo = NULL;
4962 	struct got_worktree *worktree = NULL;
4963 	const char *path, *refname = NULL;
4964 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4965 	struct got_object_id *commit_id = NULL;
4966 	char *commit_id_str = NULL;
4967 	int show_ids = 0, recurse = 0;
4968 	int ch;
4969 
4970 #ifndef PROFILE
4971 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
4972 	    NULL) == -1)
4973 		err(1, "pledge");
4974 #endif
4975 
4976 	while ((ch = getopt(argc, argv, "c:r:iR")) != -1) {
4977 		switch (ch) {
4978 		case 'c':
4979 			commit_id_str = optarg;
4980 			break;
4981 		case 'r':
4982 			repo_path = realpath(optarg, NULL);
4983 			if (repo_path == NULL)
4984 				return got_error_from_errno2("realpath",
4985 				    optarg);
4986 			got_path_strip_trailing_slashes(repo_path);
4987 			break;
4988 		case 'i':
4989 			show_ids = 1;
4990 			break;
4991 		case 'R':
4992 			recurse = 1;
4993 			break;
4994 		default:
4995 			usage_tree();
4996 			/* NOTREACHED */
4997 		}
4998 	}
4999 
5000 	argc -= optind;
5001 	argv += optind;
5002 
5003 	if (argc == 1)
5004 		path = argv[0];
5005 	else if (argc > 1)
5006 		usage_tree();
5007 	else
5008 		path = NULL;
5009 
5010 	cwd = getcwd(NULL, 0);
5011 	if (cwd == NULL) {
5012 		error = got_error_from_errno("getcwd");
5013 		goto done;
5014 	}
5015 	if (repo_path == NULL) {
5016 		error = got_worktree_open(&worktree, cwd);
5017 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5018 			goto done;
5019 		else
5020 			error = NULL;
5021 		if (worktree) {
5022 			repo_path =
5023 			    strdup(got_worktree_get_repo_path(worktree));
5024 			if (repo_path == NULL)
5025 				error = got_error_from_errno("strdup");
5026 			if (error)
5027 				goto done;
5028 		} else {
5029 			repo_path = strdup(cwd);
5030 			if (repo_path == NULL) {
5031 				error = got_error_from_errno("strdup");
5032 				goto done;
5033 			}
5034 		}
5035 	}
5036 
5037 	error = got_repo_open(&repo, repo_path, NULL);
5038 	if (error != NULL)
5039 		goto done;
5040 
5041 	if (worktree) {
5042 		const char *prefix = got_worktree_get_path_prefix(worktree);
5043 		char *p;
5044 
5045 		if (path == NULL)
5046 			path = "";
5047 		error = got_worktree_resolve_path(&p, worktree, path);
5048 		if (error)
5049 			goto done;
5050 		if (asprintf(&in_repo_path, "%s%s%s", prefix,
5051 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ?  "/" : "",
5052 		    p) == -1) {
5053 			error = got_error_from_errno("asprintf");
5054 			free(p);
5055 			goto done;
5056 		}
5057 		free(p);
5058 		error = apply_unveil(got_repo_get_path(repo), 1, NULL);
5059 		if (error)
5060 			goto done;
5061 	} else {
5062 		error = apply_unveil(got_repo_get_path(repo), 1, NULL);
5063 		if (error)
5064 			goto done;
5065 		if (path == NULL)
5066 			path = "/";
5067 		error = got_repo_map_path(&in_repo_path, repo, path);
5068 		if (error != NULL)
5069 			goto done;
5070 	}
5071 
5072 	if (commit_id_str == NULL) {
5073 		struct got_reference *head_ref;
5074 		if (worktree)
5075 			refname = got_worktree_get_head_ref_name(worktree);
5076 		else
5077 			refname = GOT_REF_HEAD;
5078 		error = got_ref_open(&head_ref, repo, refname, 0);
5079 		if (error != NULL)
5080 			goto done;
5081 		error = got_ref_resolve(&commit_id, repo, head_ref);
5082 		got_ref_close(head_ref);
5083 		if (error != NULL)
5084 			goto done;
5085 	} else {
5086 		struct got_reflist_head refs;
5087 		TAILQ_INIT(&refs);
5088 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
5089 		    NULL);
5090 		if (error)
5091 			goto done;
5092 		error = got_repo_match_object_id(&commit_id, NULL,
5093 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &refs, repo);
5094 		got_ref_list_free(&refs);
5095 		if (error)
5096 			goto done;
5097 	}
5098 
5099 	error = print_tree(in_repo_path, commit_id, show_ids, recurse,
5100 	    in_repo_path, repo);
5101 done:
5102 	free(in_repo_path);
5103 	free(repo_path);
5104 	free(cwd);
5105 	free(commit_id);
5106 	if (worktree)
5107 		got_worktree_close(worktree);
5108 	if (repo) {
5109 		const struct got_error *repo_error;
5110 		repo_error = got_repo_close(repo);
5111 		if (error == NULL)
5112 			error = repo_error;
5113 	}
5114 	return error;
5115 }
5116 
5117 __dead static void
5118 usage_status(void)
5119 {
5120 	fprintf(stderr, "usage: %s status [-s status-codes ] [path ...]\n",
5121 	    getprogname());
5122 	exit(1);
5123 }
5124 
5125 static const struct got_error *
5126 print_status(void *arg, unsigned char status, unsigned char staged_status,
5127     const char *path, struct got_object_id *blob_id,
5128     struct got_object_id *staged_blob_id, struct got_object_id *commit_id,
5129     int dirfd, const char *de_name)
5130 {
5131 	if (status == staged_status && (status == GOT_STATUS_DELETE))
5132 		status = GOT_STATUS_NO_CHANGE;
5133 	if (arg) {
5134 		char *status_codes = arg;
5135 		size_t ncodes = strlen(status_codes);
5136 		int i;
5137 		for (i = 0; i < ncodes ; i++) {
5138 			if (status == status_codes[i] ||
5139 			    staged_status == status_codes[i])
5140 				break;
5141 		}
5142 		if (i == ncodes)
5143 			return NULL;
5144 	}
5145 	printf("%c%c %s\n", status, staged_status, path);
5146 	return NULL;
5147 }
5148 
5149 static const struct got_error *
5150 cmd_status(int argc, char *argv[])
5151 {
5152 	const struct got_error *error = NULL;
5153 	struct got_repository *repo = NULL;
5154 	struct got_worktree *worktree = NULL;
5155 	char *cwd = NULL, *status_codes = NULL;;
5156 	struct got_pathlist_head paths;
5157 	struct got_pathlist_entry *pe;
5158 	int ch, i;
5159 
5160 	TAILQ_INIT(&paths);
5161 
5162 	while ((ch = getopt(argc, argv, "s:")) != -1) {
5163 		switch (ch) {
5164 		case 's':
5165 			for (i = 0; i < strlen(optarg); i++) {
5166 				switch (optarg[i]) {
5167 				case GOT_STATUS_MODIFY:
5168 				case GOT_STATUS_ADD:
5169 				case GOT_STATUS_DELETE:
5170 				case GOT_STATUS_CONFLICT:
5171 				case GOT_STATUS_MISSING:
5172 				case GOT_STATUS_OBSTRUCTED:
5173 				case GOT_STATUS_UNVERSIONED:
5174 				case GOT_STATUS_MODE_CHANGE:
5175 				case GOT_STATUS_NONEXISTENT:
5176 					break;
5177 				default:
5178 					errx(1, "invalid status code '%c'",
5179 					    optarg[i]);
5180 				}
5181 			}
5182 			status_codes = optarg;
5183 			break;
5184 		default:
5185 			usage_status();
5186 			/* NOTREACHED */
5187 		}
5188 	}
5189 
5190 	argc -= optind;
5191 	argv += optind;
5192 
5193 #ifndef PROFILE
5194 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
5195 	    NULL) == -1)
5196 		err(1, "pledge");
5197 #endif
5198 	cwd = getcwd(NULL, 0);
5199 	if (cwd == NULL) {
5200 		error = got_error_from_errno("getcwd");
5201 		goto done;
5202 	}
5203 
5204 	error = got_worktree_open(&worktree, cwd);
5205 	if (error) {
5206 		if (error->code == GOT_ERR_NOT_WORKTREE)
5207 			error = wrap_not_worktree_error(error, "status", cwd);
5208 		goto done;
5209 	}
5210 
5211 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
5212 	    NULL);
5213 	if (error != NULL)
5214 		goto done;
5215 
5216 	error = apply_unveil(got_repo_get_path(repo), 1,
5217 	    got_worktree_get_root_path(worktree));
5218 	if (error)
5219 		goto done;
5220 
5221 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
5222 	if (error)
5223 		goto done;
5224 
5225 	error = got_worktree_status(worktree, &paths, repo, print_status,
5226 	    status_codes, check_cancelled, NULL);
5227 done:
5228 	TAILQ_FOREACH(pe, &paths, entry)
5229 		free((char *)pe->path);
5230 	got_pathlist_free(&paths);
5231 	free(cwd);
5232 	return error;
5233 }
5234 
5235 __dead static void
5236 usage_ref(void)
5237 {
5238 	fprintf(stderr,
5239 	    "usage: %s ref [-r repository] [-l] [-c object] [-s reference] "
5240 	        "[-d] [name]\n",
5241 	    getprogname());
5242 	exit(1);
5243 }
5244 
5245 static const struct got_error *
5246 list_refs(struct got_repository *repo, const char *refname)
5247 {
5248 	static const struct got_error *err = NULL;
5249 	struct got_reflist_head refs;
5250 	struct got_reflist_entry *re;
5251 
5252 	TAILQ_INIT(&refs);
5253 	err = got_ref_list(&refs, repo, refname, got_ref_cmp_by_name, NULL);
5254 	if (err)
5255 		return err;
5256 
5257 	TAILQ_FOREACH(re, &refs, entry) {
5258 		char *refstr;
5259 		refstr = got_ref_to_str(re->ref);
5260 		if (refstr == NULL)
5261 			return got_error_from_errno("got_ref_to_str");
5262 		printf("%s: %s\n", got_ref_get_name(re->ref), refstr);
5263 		free(refstr);
5264 	}
5265 
5266 	got_ref_list_free(&refs);
5267 	return NULL;
5268 }
5269 
5270 static const struct got_error *
5271 delete_ref(struct got_repository *repo, const char *refname)
5272 {
5273 	const struct got_error *err = NULL;
5274 	struct got_reference *ref;
5275 
5276 	err = got_ref_open(&ref, repo, refname, 0);
5277 	if (err)
5278 		return err;
5279 
5280 	err = got_ref_delete(ref, repo);
5281 	got_ref_close(ref);
5282 	return err;
5283 }
5284 
5285 static const struct got_error *
5286 add_ref(struct got_repository *repo, const char *refname, const char *target)
5287 {
5288 	const struct got_error *err = NULL;
5289 	struct got_object_id *id;
5290 	struct got_reference *ref = NULL;
5291 
5292 	/*
5293 	 * Don't let the user create a reference name with a leading '-'.
5294 	 * While technically a valid reference name, this case is usually
5295 	 * an unintended typo.
5296 	 */
5297 	if (refname[0] == '-')
5298 		return got_error_path(refname, GOT_ERR_REF_NAME_MINUS);
5299 
5300 	err = got_repo_match_object_id_prefix(&id, target, GOT_OBJ_TYPE_ANY,
5301 	    repo);
5302 	if (err) {
5303 		struct got_reference *target_ref;
5304 
5305 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
5306 			return err;
5307 		err = got_ref_open(&target_ref, repo, target, 0);
5308 		if (err)
5309 			return err;
5310 		err = got_ref_resolve(&id, repo, target_ref);
5311 		got_ref_close(target_ref);
5312 		if (err)
5313 			return err;
5314 	}
5315 
5316 	err = got_ref_alloc(&ref, refname, id);
5317 	if (err)
5318 		goto done;
5319 
5320 	err = got_ref_write(ref, repo);
5321 done:
5322 	if (ref)
5323 		got_ref_close(ref);
5324 	free(id);
5325 	return err;
5326 }
5327 
5328 static const struct got_error *
5329 add_symref(struct got_repository *repo, const char *refname, const char *target)
5330 {
5331 	const struct got_error *err = NULL;
5332 	struct got_reference *ref = NULL;
5333 	struct got_reference *target_ref = NULL;
5334 
5335 	/*
5336 	 * Don't let the user create a reference name with a leading '-'.
5337 	 * While technically a valid reference name, this case is usually
5338 	 * an unintended typo.
5339 	 */
5340 	if (refname[0] == '-')
5341 		return got_error_path(refname, GOT_ERR_REF_NAME_MINUS);
5342 
5343 	err = got_ref_open(&target_ref, repo, target, 0);
5344 	if (err)
5345 		return err;
5346 
5347 	err = got_ref_alloc_symref(&ref, refname, target_ref);
5348 	if (err)
5349 		goto done;
5350 
5351 	err = got_ref_write(ref, repo);
5352 done:
5353 	if (target_ref)
5354 		got_ref_close(target_ref);
5355 	if (ref)
5356 		got_ref_close(ref);
5357 	return err;
5358 }
5359 
5360 static const struct got_error *
5361 cmd_ref(int argc, char *argv[])
5362 {
5363 	const struct got_error *error = NULL;
5364 	struct got_repository *repo = NULL;
5365 	struct got_worktree *worktree = NULL;
5366 	char *cwd = NULL, *repo_path = NULL;
5367 	int ch, do_list = 0, do_delete = 0;
5368 	const char *obj_arg = NULL, *symref_target= NULL;
5369 	char *refname = NULL;
5370 
5371 	while ((ch = getopt(argc, argv, "c:dr:ls:")) != -1) {
5372 		switch (ch) {
5373 		case 'c':
5374 			obj_arg = optarg;
5375 			break;
5376 		case 'd':
5377 			do_delete = 1;
5378 			break;
5379 		case 'r':
5380 			repo_path = realpath(optarg, NULL);
5381 			if (repo_path == NULL)
5382 				return got_error_from_errno2("realpath",
5383 				    optarg);
5384 			got_path_strip_trailing_slashes(repo_path);
5385 			break;
5386 		case 'l':
5387 			do_list = 1;
5388 			break;
5389 		case 's':
5390 			symref_target = optarg;
5391 			break;
5392 		default:
5393 			usage_ref();
5394 			/* NOTREACHED */
5395 		}
5396 	}
5397 
5398 	if (obj_arg && do_list)
5399 		option_conflict('c', 'l');
5400 	if (obj_arg && do_delete)
5401 		option_conflict('c', 'd');
5402 	if (obj_arg && symref_target)
5403 		option_conflict('c', 's');
5404 	if (symref_target && do_delete)
5405 		option_conflict('s', 'd');
5406 	if (symref_target && do_list)
5407 		option_conflict('s', 'l');
5408 	if (do_delete && do_list)
5409 		option_conflict('d', 'l');
5410 
5411 	argc -= optind;
5412 	argv += optind;
5413 
5414 	if (do_list) {
5415 		if (argc != 0 && argc != 1)
5416 			usage_ref();
5417 		if (argc == 1) {
5418 			refname = strdup(argv[0]);
5419 			if (refname == NULL) {
5420 				error = got_error_from_errno("strdup");
5421 				goto done;
5422 			}
5423 		}
5424 	} else {
5425 		if (argc != 1)
5426 			usage_ref();
5427 		refname = strdup(argv[0]);
5428 		if (refname == NULL) {
5429 			error = got_error_from_errno("strdup");
5430 			goto done;
5431 		}
5432 	}
5433 
5434 	if (refname)
5435 		got_path_strip_trailing_slashes(refname);
5436 
5437 #ifndef PROFILE
5438 	if (do_list) {
5439 		if (pledge("stdio rpath wpath flock proc exec sendfd unveil",
5440 		    NULL) == -1)
5441 			err(1, "pledge");
5442 	} else {
5443 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
5444 		    "sendfd unveil", NULL) == -1)
5445 			err(1, "pledge");
5446 	}
5447 #endif
5448 	cwd = getcwd(NULL, 0);
5449 	if (cwd == NULL) {
5450 		error = got_error_from_errno("getcwd");
5451 		goto done;
5452 	}
5453 
5454 	if (repo_path == NULL) {
5455 		error = got_worktree_open(&worktree, cwd);
5456 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5457 			goto done;
5458 		else
5459 			error = NULL;
5460 		if (worktree) {
5461 			repo_path =
5462 			    strdup(got_worktree_get_repo_path(worktree));
5463 			if (repo_path == NULL)
5464 				error = got_error_from_errno("strdup");
5465 			if (error)
5466 				goto done;
5467 		} else {
5468 			repo_path = strdup(cwd);
5469 			if (repo_path == NULL) {
5470 				error = got_error_from_errno("strdup");
5471 				goto done;
5472 			}
5473 		}
5474 	}
5475 
5476 	error = got_repo_open(&repo, repo_path, NULL);
5477 	if (error != NULL)
5478 		goto done;
5479 
5480 	error = apply_unveil(got_repo_get_path(repo), do_list,
5481 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
5482 	if (error)
5483 		goto done;
5484 
5485 	if (do_list)
5486 		error = list_refs(repo, refname);
5487 	else if (do_delete)
5488 		error = delete_ref(repo, refname);
5489 	else if (symref_target)
5490 		error = add_symref(repo, refname, symref_target);
5491 	else {
5492 		if (obj_arg == NULL)
5493 			usage_ref();
5494 		error = add_ref(repo, refname, obj_arg);
5495 	}
5496 done:
5497 	free(refname);
5498 	if (repo)
5499 		got_repo_close(repo);
5500 	if (worktree)
5501 		got_worktree_close(worktree);
5502 	free(cwd);
5503 	free(repo_path);
5504 	return error;
5505 }
5506 
5507 __dead static void
5508 usage_branch(void)
5509 {
5510 	fprintf(stderr,
5511 	    "usage: %s branch [-c commit] [-d] [-r repository] [-l] [-n] "
5512 	        "[name]\n", getprogname());
5513 	exit(1);
5514 }
5515 
5516 static const struct got_error *
5517 list_branch(struct got_repository *repo, struct got_worktree *worktree,
5518     struct got_reference *ref)
5519 {
5520 	const struct got_error *err = NULL;
5521 	const char *refname, *marker = "  ";
5522 	char *refstr;
5523 
5524 	refname = got_ref_get_name(ref);
5525 	if (worktree && strcmp(refname,
5526 	    got_worktree_get_head_ref_name(worktree)) == 0) {
5527 		struct got_object_id *id = NULL;
5528 
5529 		err = got_ref_resolve(&id, repo, ref);
5530 		if (err)
5531 			return err;
5532 		if (got_object_id_cmp(id,
5533 		    got_worktree_get_base_commit_id(worktree)) == 0)
5534 			marker = "* ";
5535 		else
5536 			marker = "~ ";
5537 		free(id);
5538 	}
5539 
5540 	if (strncmp(refname, "refs/heads/", 11) == 0)
5541 		refname += 11;
5542 	if (strncmp(refname, "refs/got/worktree/", 18) == 0)
5543 		refname += 18;
5544 	if (strncmp(refname, "refs/remotes/", 13) == 0)
5545 		refname += 13;
5546 
5547 	refstr = got_ref_to_str(ref);
5548 	if (refstr == NULL)
5549 		return got_error_from_errno("got_ref_to_str");
5550 
5551 	printf("%s%s: %s\n", marker, refname, refstr);
5552 	free(refstr);
5553 	return NULL;
5554 }
5555 
5556 static const struct got_error *
5557 show_current_branch(struct got_repository *repo, struct got_worktree *worktree)
5558 {
5559 	const char *refname;
5560 
5561 	if (worktree == NULL)
5562 		return got_error(GOT_ERR_NOT_WORKTREE);
5563 
5564 	refname = got_worktree_get_head_ref_name(worktree);
5565 
5566 	if (strncmp(refname, "refs/heads/", 11) == 0)
5567 		refname += 11;
5568 	if (strncmp(refname, "refs/got/worktree/", 18) == 0)
5569 		refname += 18;
5570 
5571 	printf("%s\n", refname);
5572 
5573 	return NULL;
5574 }
5575 
5576 static const struct got_error *
5577 list_branches(struct got_repository *repo, struct got_worktree *worktree)
5578 {
5579 	static const struct got_error *err = NULL;
5580 	struct got_reflist_head refs;
5581 	struct got_reflist_entry *re;
5582 	struct got_reference *temp_ref = NULL;
5583 	int rebase_in_progress, histedit_in_progress;
5584 
5585 	TAILQ_INIT(&refs);
5586 
5587 	if (worktree) {
5588 		err = got_worktree_rebase_in_progress(&rebase_in_progress,
5589 		    worktree);
5590 		if (err)
5591 			return err;
5592 
5593 		err = got_worktree_histedit_in_progress(&histedit_in_progress,
5594 		    worktree);
5595 		if (err)
5596 			return err;
5597 
5598 		if (rebase_in_progress || histedit_in_progress) {
5599 			err = got_ref_open(&temp_ref, repo,
5600 			    got_worktree_get_head_ref_name(worktree), 0);
5601 			if (err)
5602 				return err;
5603 			list_branch(repo, worktree, temp_ref);
5604 			got_ref_close(temp_ref);
5605 		}
5606 	}
5607 
5608 	err = got_ref_list(&refs, repo, "refs/heads",
5609 	    got_ref_cmp_by_name, NULL);
5610 	if (err)
5611 		return err;
5612 
5613 	TAILQ_FOREACH(re, &refs, entry)
5614 		list_branch(repo, worktree, re->ref);
5615 
5616 	got_ref_list_free(&refs);
5617 
5618 	err = got_ref_list(&refs, repo, "refs/remotes",
5619 	    got_ref_cmp_by_name, NULL);
5620 	if (err)
5621 		return err;
5622 
5623 	TAILQ_FOREACH(re, &refs, entry)
5624 		list_branch(repo, worktree, re->ref);
5625 
5626 	got_ref_list_free(&refs);
5627 
5628 	return NULL;
5629 }
5630 
5631 static const struct got_error *
5632 delete_branch(struct got_repository *repo, struct got_worktree *worktree,
5633     const char *branch_name)
5634 {
5635 	const struct got_error *err = NULL;
5636 	struct got_reference *ref = NULL;
5637 	char *refname;
5638 
5639 	if (asprintf(&refname, "refs/heads/%s", branch_name) == -1)
5640 		return got_error_from_errno("asprintf");
5641 
5642 	err = got_ref_open(&ref, repo, refname, 0);
5643 	if (err)
5644 		goto done;
5645 
5646 	if (worktree &&
5647 	    strcmp(got_worktree_get_head_ref_name(worktree),
5648 	    got_ref_get_name(ref)) == 0) {
5649 		err = got_error_msg(GOT_ERR_SAME_BRANCH,
5650 		    "will not delete this work tree's current branch");
5651 		goto done;
5652 	}
5653 
5654 	err = got_ref_delete(ref, repo);
5655 done:
5656 	if (ref)
5657 		got_ref_close(ref);
5658 	free(refname);
5659 	return err;
5660 }
5661 
5662 static const struct got_error *
5663 add_branch(struct got_repository *repo, const char *branch_name,
5664     struct got_object_id *base_commit_id)
5665 {
5666 	const struct got_error *err = NULL;
5667 	struct got_reference *ref = NULL;
5668 	char *base_refname = NULL, *refname = NULL;
5669 
5670 	/*
5671 	 * Don't let the user create a branch name with a leading '-'.
5672 	 * While technically a valid reference name, this case is usually
5673 	 * an unintended typo.
5674 	 */
5675 	if (branch_name[0] == '-')
5676 		return got_error_path(branch_name, GOT_ERR_REF_NAME_MINUS);
5677 
5678 	if (asprintf(&refname, "refs/heads/%s", branch_name) == -1) {
5679 		err = got_error_from_errno("asprintf");
5680 		goto done;
5681 	}
5682 
5683 	err = got_ref_open(&ref, repo, refname, 0);
5684 	if (err == NULL) {
5685 		err = got_error(GOT_ERR_BRANCH_EXISTS);
5686 		goto done;
5687 	} else if (err->code != GOT_ERR_NOT_REF)
5688 		goto done;
5689 
5690 	err = got_ref_alloc(&ref, refname, base_commit_id);
5691 	if (err)
5692 		goto done;
5693 
5694 	err = got_ref_write(ref, repo);
5695 done:
5696 	if (ref)
5697 		got_ref_close(ref);
5698 	free(base_refname);
5699 	free(refname);
5700 	return err;
5701 }
5702 
5703 static const struct got_error *
5704 cmd_branch(int argc, char *argv[])
5705 {
5706 	const struct got_error *error = NULL;
5707 	struct got_repository *repo = NULL;
5708 	struct got_worktree *worktree = NULL;
5709 	char *cwd = NULL, *repo_path = NULL;
5710 	int ch, do_list = 0, do_show = 0, do_update = 1;
5711 	const char *delref = NULL, *commit_id_arg = NULL;
5712 	struct got_reference *ref = NULL;
5713 	struct got_pathlist_head paths;
5714 	struct got_pathlist_entry *pe;
5715 	struct got_object_id *commit_id = NULL;
5716 	char *commit_id_str = NULL;
5717 
5718 	TAILQ_INIT(&paths);
5719 
5720 	while ((ch = getopt(argc, argv, "c:d:r:ln")) != -1) {
5721 		switch (ch) {
5722 		case 'c':
5723 			commit_id_arg = optarg;
5724 			break;
5725 		case 'd':
5726 			delref = optarg;
5727 			break;
5728 		case 'r':
5729 			repo_path = realpath(optarg, NULL);
5730 			if (repo_path == NULL)
5731 				return got_error_from_errno2("realpath",
5732 				    optarg);
5733 			got_path_strip_trailing_slashes(repo_path);
5734 			break;
5735 		case 'l':
5736 			do_list = 1;
5737 			break;
5738 		case 'n':
5739 			do_update = 0;
5740 			break;
5741 		default:
5742 			usage_branch();
5743 			/* NOTREACHED */
5744 		}
5745 	}
5746 
5747 	if (do_list && delref)
5748 		option_conflict('l', 'd');
5749 
5750 	argc -= optind;
5751 	argv += optind;
5752 
5753 	if (!do_list && !delref && argc == 0)
5754 		do_show = 1;
5755 
5756 	if ((do_list || delref || do_show) && commit_id_arg != NULL)
5757 		errx(1, "-c option can only be used when creating a branch");
5758 
5759 	if (do_list || delref) {
5760 		if (argc > 0)
5761 			usage_branch();
5762 	} else if (!do_show && argc != 1)
5763 		usage_branch();
5764 
5765 #ifndef PROFILE
5766 	if (do_list || do_show) {
5767 		if (pledge("stdio rpath wpath flock proc exec sendfd unveil",
5768 		    NULL) == -1)
5769 			err(1, "pledge");
5770 	} else {
5771 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
5772 		    "sendfd unveil", NULL) == -1)
5773 			err(1, "pledge");
5774 	}
5775 #endif
5776 	cwd = getcwd(NULL, 0);
5777 	if (cwd == NULL) {
5778 		error = got_error_from_errno("getcwd");
5779 		goto done;
5780 	}
5781 
5782 	if (repo_path == NULL) {
5783 		error = got_worktree_open(&worktree, cwd);
5784 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5785 			goto done;
5786 		else
5787 			error = NULL;
5788 		if (worktree) {
5789 			repo_path =
5790 			    strdup(got_worktree_get_repo_path(worktree));
5791 			if (repo_path == NULL)
5792 				error = got_error_from_errno("strdup");
5793 			if (error)
5794 				goto done;
5795 		} else {
5796 			repo_path = strdup(cwd);
5797 			if (repo_path == NULL) {
5798 				error = got_error_from_errno("strdup");
5799 				goto done;
5800 			}
5801 		}
5802 	}
5803 
5804 	error = got_repo_open(&repo, repo_path, NULL);
5805 	if (error != NULL)
5806 		goto done;
5807 
5808 	error = apply_unveil(got_repo_get_path(repo), do_list,
5809 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
5810 	if (error)
5811 		goto done;
5812 
5813 	if (do_show)
5814 		error = show_current_branch(repo, worktree);
5815 	else if (do_list)
5816 		error = list_branches(repo, worktree);
5817 	else if (delref)
5818 		error = delete_branch(repo, worktree, delref);
5819 	else {
5820 		struct got_reflist_head refs;
5821 		TAILQ_INIT(&refs);
5822 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
5823 		    NULL);
5824 		if (error)
5825 			goto done;
5826 		if (commit_id_arg == NULL)
5827 			commit_id_arg = worktree ?
5828 			    got_worktree_get_head_ref_name(worktree) :
5829 			    GOT_REF_HEAD;
5830 		error = got_repo_match_object_id(&commit_id, NULL,
5831 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &refs, repo);
5832 		got_ref_list_free(&refs);
5833 		if (error)
5834 			goto done;
5835 		error = add_branch(repo, argv[0], commit_id);
5836 		if (error)
5837 			goto done;
5838 		if (worktree && do_update) {
5839 			struct got_update_progress_arg upa;
5840 			char *branch_refname = NULL;
5841 
5842 			error = got_object_id_str(&commit_id_str, commit_id);
5843 			if (error)
5844 				goto done;
5845 			error = get_worktree_paths_from_argv(&paths, 0, NULL,
5846 			    worktree);
5847 			if (error)
5848 				goto done;
5849 			if (asprintf(&branch_refname, "refs/heads/%s", argv[0])
5850 			    == -1) {
5851 				error = got_error_from_errno("asprintf");
5852 				goto done;
5853 			}
5854 			error = got_ref_open(&ref, repo, branch_refname, 0);
5855 			free(branch_refname);
5856 			if (error)
5857 				goto done;
5858 			error = switch_head_ref(ref, commit_id, worktree,
5859 			    repo);
5860 			if (error)
5861 				goto done;
5862 			error = got_worktree_set_base_commit_id(worktree, repo,
5863 			    commit_id);
5864 			if (error)
5865 				goto done;
5866 			memset(&upa, 0, sizeof(upa));
5867 			error = got_worktree_checkout_files(worktree, &paths,
5868 			    repo, update_progress, &upa, check_cancelled,
5869 			    NULL);
5870 			if (error)
5871 				goto done;
5872 			if (upa.did_something)
5873 				printf("Updated to commit %s\n", commit_id_str);
5874 			print_update_progress_stats(&upa);
5875 		}
5876 	}
5877 done:
5878 	if (ref)
5879 		got_ref_close(ref);
5880 	if (repo)
5881 		got_repo_close(repo);
5882 	if (worktree)
5883 		got_worktree_close(worktree);
5884 	free(cwd);
5885 	free(repo_path);
5886 	free(commit_id);
5887 	free(commit_id_str);
5888 	TAILQ_FOREACH(pe, &paths, entry)
5889 		free((char *)pe->path);
5890 	got_pathlist_free(&paths);
5891 	return error;
5892 }
5893 
5894 
5895 __dead static void
5896 usage_tag(void)
5897 {
5898 	fprintf(stderr,
5899 	    "usage: %s tag [-c commit] [-r repository] [-l] "
5900 	        "[-m message] name\n", getprogname());
5901 	exit(1);
5902 }
5903 
5904 #if 0
5905 static const struct got_error *
5906 sort_tags(struct got_reflist_head *sorted, struct got_reflist_head *tags)
5907 {
5908 	const struct got_error *err = NULL;
5909 	struct got_reflist_entry *re, *se, *new;
5910 	struct got_object_id *re_id, *se_id;
5911 	struct got_tag_object *re_tag, *se_tag;
5912 	time_t re_time, se_time;
5913 
5914 	SIMPLEQ_FOREACH(re, tags, entry) {
5915 		se = SIMPLEQ_FIRST(sorted);
5916 		if (se == NULL) {
5917 			err = got_reflist_entry_dup(&new, re);
5918 			if (err)
5919 				return err;
5920 			SIMPLEQ_INSERT_HEAD(sorted, new, entry);
5921 			continue;
5922 		} else {
5923 			err = got_ref_resolve(&re_id, repo, re->ref);
5924 			if (err)
5925 				break;
5926 			err = got_object_open_as_tag(&re_tag, repo, re_id);
5927 			free(re_id);
5928 			if (err)
5929 				break;
5930 			re_time = got_object_tag_get_tagger_time(re_tag);
5931 			got_object_tag_close(re_tag);
5932 		}
5933 
5934 		while (se) {
5935 			err = got_ref_resolve(&se_id, repo, re->ref);
5936 			if (err)
5937 				break;
5938 			err = got_object_open_as_tag(&se_tag, repo, se_id);
5939 			free(se_id);
5940 			if (err)
5941 				break;
5942 			se_time = got_object_tag_get_tagger_time(se_tag);
5943 			got_object_tag_close(se_tag);
5944 
5945 			if (se_time > re_time) {
5946 				err = got_reflist_entry_dup(&new, re);
5947 				if (err)
5948 					return err;
5949 				SIMPLEQ_INSERT_AFTER(sorted, se, new, entry);
5950 				break;
5951 			}
5952 			se = SIMPLEQ_NEXT(se, entry);
5953 			continue;
5954 		}
5955 	}
5956 done:
5957 	return err;
5958 }
5959 #endif
5960 
5961 static const struct got_error *
5962 list_tags(struct got_repository *repo, struct got_worktree *worktree)
5963 {
5964 	static const struct got_error *err = NULL;
5965 	struct got_reflist_head refs;
5966 	struct got_reflist_entry *re;
5967 
5968 	TAILQ_INIT(&refs);
5969 
5970 	err = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags, repo);
5971 	if (err)
5972 		return err;
5973 
5974 	TAILQ_FOREACH(re, &refs, entry) {
5975 		const char *refname;
5976 		char *refstr, *tagmsg0, *tagmsg, *line, *id_str, *datestr;
5977 		char datebuf[26];
5978 		const char *tagger;
5979 		time_t tagger_time;
5980 		struct got_object_id *id;
5981 		struct got_tag_object *tag;
5982 		struct got_commit_object *commit = NULL;
5983 
5984 		refname = got_ref_get_name(re->ref);
5985 		if (strncmp(refname, "refs/tags/", 10) != 0)
5986 			continue;
5987 		refname += 10;
5988 		refstr = got_ref_to_str(re->ref);
5989 		if (refstr == NULL) {
5990 			err = got_error_from_errno("got_ref_to_str");
5991 			break;
5992 		}
5993 		printf("%stag %s %s\n", GOT_COMMIT_SEP_STR, refname, refstr);
5994 		free(refstr);
5995 
5996 		err = got_ref_resolve(&id, repo, re->ref);
5997 		if (err)
5998 			break;
5999 		err = got_object_open_as_tag(&tag, repo, id);
6000 		if (err) {
6001 			if (err->code != GOT_ERR_OBJ_TYPE) {
6002 				free(id);
6003 				break;
6004 			}
6005 			/* "lightweight" tag */
6006 			err = got_object_open_as_commit(&commit, repo, id);
6007 			if (err) {
6008 				free(id);
6009 				break;
6010 			}
6011 			tagger = got_object_commit_get_committer(commit);
6012 			tagger_time =
6013 			    got_object_commit_get_committer_time(commit);
6014 			err = got_object_id_str(&id_str, id);
6015 			free(id);
6016 			if (err)
6017 				break;
6018 		} else {
6019 			free(id);
6020 			tagger = got_object_tag_get_tagger(tag);
6021 			tagger_time = got_object_tag_get_tagger_time(tag);
6022 			err = got_object_id_str(&id_str,
6023 			    got_object_tag_get_object_id(tag));
6024 			if (err)
6025 				break;
6026 		}
6027 		printf("from: %s\n", tagger);
6028 		datestr = get_datestr(&tagger_time, datebuf);
6029 		if (datestr)
6030 			printf("date: %s UTC\n", datestr);
6031 		if (commit)
6032 			printf("object: %s %s\n", GOT_OBJ_LABEL_COMMIT, id_str);
6033 		else {
6034 			switch (got_object_tag_get_object_type(tag)) {
6035 			case GOT_OBJ_TYPE_BLOB:
6036 				printf("object: %s %s\n", GOT_OBJ_LABEL_BLOB,
6037 				    id_str);
6038 				break;
6039 			case GOT_OBJ_TYPE_TREE:
6040 				printf("object: %s %s\n", GOT_OBJ_LABEL_TREE,
6041 				    id_str);
6042 				break;
6043 			case GOT_OBJ_TYPE_COMMIT:
6044 				printf("object: %s %s\n", GOT_OBJ_LABEL_COMMIT,
6045 				    id_str);
6046 				break;
6047 			case GOT_OBJ_TYPE_TAG:
6048 				printf("object: %s %s\n", GOT_OBJ_LABEL_TAG,
6049 				    id_str);
6050 				break;
6051 			default:
6052 				break;
6053 			}
6054 		}
6055 		free(id_str);
6056 		if (commit) {
6057 			err = got_object_commit_get_logmsg(&tagmsg0, commit);
6058 			if (err)
6059 				break;
6060 			got_object_commit_close(commit);
6061 		} else {
6062 			tagmsg0 = strdup(got_object_tag_get_message(tag));
6063 			got_object_tag_close(tag);
6064 			if (tagmsg0 == NULL) {
6065 				err = got_error_from_errno("strdup");
6066 				break;
6067 			}
6068 		}
6069 
6070 		tagmsg = tagmsg0;
6071 		do {
6072 			line = strsep(&tagmsg, "\n");
6073 			if (line)
6074 				printf(" %s\n", line);
6075 		} while (line);
6076 		free(tagmsg0);
6077 	}
6078 
6079 	got_ref_list_free(&refs);
6080 	return NULL;
6081 }
6082 
6083 static const struct got_error *
6084 get_tag_message(char **tagmsg, char **tagmsg_path, const char *commit_id_str,
6085     const char *tag_name, const char *repo_path)
6086 {
6087 	const struct got_error *err = NULL;
6088 	char *template = NULL, *initial_content = NULL;
6089 	char *editor = NULL;
6090 	int initial_content_len;
6091 	int fd = -1;
6092 
6093 	if (asprintf(&template, GOT_TMPDIR_STR "/got-tagmsg") == -1) {
6094 		err = got_error_from_errno("asprintf");
6095 		goto done;
6096 	}
6097 
6098 	initial_content_len = asprintf(&initial_content,
6099 	    "\n# tagging commit %s as %s\n",
6100 	    commit_id_str, tag_name);
6101 	if (initial_content_len == -1) {
6102 		err = got_error_from_errno("asprintf");
6103 		goto done;
6104 	}
6105 
6106 	err = got_opentemp_named_fd(tagmsg_path, &fd, template);
6107 	if (err)
6108 		goto done;
6109 
6110 	if (write(fd, initial_content, initial_content_len) == -1) {
6111 		err = got_error_from_errno2("write", *tagmsg_path);
6112 		goto done;
6113 	}
6114 
6115 	err = get_editor(&editor);
6116 	if (err)
6117 		goto done;
6118 	err = edit_logmsg(tagmsg, editor, *tagmsg_path, initial_content,
6119 	    initial_content_len, 1);
6120 done:
6121 	free(initial_content);
6122 	free(template);
6123 	free(editor);
6124 
6125 	if (fd != -1 && close(fd) == -1 && err == NULL)
6126 		err = got_error_from_errno2("close", *tagmsg_path);
6127 
6128 	/* Editor is done; we can now apply unveil(2) */
6129 	if (err == NULL)
6130 		err = apply_unveil(repo_path, 0, NULL);
6131 	if (err) {
6132 		free(*tagmsg);
6133 		*tagmsg = NULL;
6134 	}
6135 	return err;
6136 }
6137 
6138 static const struct got_error *
6139 add_tag(struct got_repository *repo, struct got_worktree *worktree,
6140     const char *tag_name, const char *commit_arg, const char *tagmsg_arg)
6141 {
6142 	const struct got_error *err = NULL;
6143 	struct got_object_id *commit_id = NULL, *tag_id = NULL;
6144 	char *label = NULL, *commit_id_str = NULL;
6145 	struct got_reference *ref = NULL;
6146 	char *refname = NULL, *tagmsg = NULL, *tagger = NULL;
6147 	char *tagmsg_path = NULL, *tag_id_str = NULL;
6148 	int preserve_tagmsg = 0;
6149 	struct got_reflist_head refs;
6150 
6151 	TAILQ_INIT(&refs);
6152 
6153 	/*
6154 	 * Don't let the user create a tag name with a leading '-'.
6155 	 * While technically a valid reference name, this case is usually
6156 	 * an unintended typo.
6157 	 */
6158 	if (tag_name[0] == '-')
6159 		return got_error_path(tag_name, GOT_ERR_REF_NAME_MINUS);
6160 
6161 	err = get_author(&tagger, repo, worktree);
6162 	if (err)
6163 		return err;
6164 
6165 	err = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
6166 	if (err)
6167 		goto done;
6168 
6169 	err = got_repo_match_object_id(&commit_id, &label, commit_arg,
6170 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
6171 	if (err)
6172 		goto done;
6173 
6174 	err = got_object_id_str(&commit_id_str, commit_id);
6175 	if (err)
6176 		goto done;
6177 
6178 	if (strncmp("refs/tags/", tag_name, 10) == 0) {
6179 		refname = strdup(tag_name);
6180 		if (refname == NULL) {
6181 			err = got_error_from_errno("strdup");
6182 			goto done;
6183 		}
6184 		tag_name += 10;
6185 	} else if (asprintf(&refname, "refs/tags/%s", tag_name) == -1) {
6186 		err = got_error_from_errno("asprintf");
6187 		goto done;
6188 	}
6189 
6190 	err = got_ref_open(&ref, repo, refname, 0);
6191 	if (err == NULL) {
6192 		err = got_error(GOT_ERR_TAG_EXISTS);
6193 		goto done;
6194 	} else if (err->code != GOT_ERR_NOT_REF)
6195 		goto done;
6196 
6197 	if (tagmsg_arg == NULL) {
6198 		err = get_tag_message(&tagmsg, &tagmsg_path, commit_id_str,
6199 		    tag_name, got_repo_get_path(repo));
6200 		if (err) {
6201 			if (err->code != GOT_ERR_COMMIT_MSG_EMPTY &&
6202 			    tagmsg_path != NULL)
6203 				preserve_tagmsg = 1;
6204 			goto done;
6205 		}
6206 	}
6207 
6208 	err = got_object_tag_create(&tag_id, tag_name, commit_id,
6209 	    tagger, time(NULL), tagmsg ? tagmsg : tagmsg_arg, repo);
6210 	if (err) {
6211 		if (tagmsg_path)
6212 			preserve_tagmsg = 1;
6213 		goto done;
6214 	}
6215 
6216 	err = got_ref_alloc(&ref, refname, tag_id);
6217 	if (err) {
6218 		if (tagmsg_path)
6219 			preserve_tagmsg = 1;
6220 		goto done;
6221 	}
6222 
6223 	err = got_ref_write(ref, repo);
6224 	if (err) {
6225 		if (tagmsg_path)
6226 			preserve_tagmsg = 1;
6227 		goto done;
6228 	}
6229 
6230 	err = got_object_id_str(&tag_id_str, tag_id);
6231 	if (err) {
6232 		if (tagmsg_path)
6233 			preserve_tagmsg = 1;
6234 		goto done;
6235 	}
6236 	printf("Created tag %s\n", tag_id_str);
6237 done:
6238 	if (preserve_tagmsg) {
6239 		fprintf(stderr, "%s: tag message preserved in %s\n",
6240 		    getprogname(), tagmsg_path);
6241 	} else if (tagmsg_path && unlink(tagmsg_path) == -1 && err == NULL)
6242 		err = got_error_from_errno2("unlink", tagmsg_path);
6243 	free(tag_id_str);
6244 	if (ref)
6245 		got_ref_close(ref);
6246 	free(commit_id);
6247 	free(commit_id_str);
6248 	free(refname);
6249 	free(tagmsg);
6250 	free(tagmsg_path);
6251 	free(tagger);
6252 	got_ref_list_free(&refs);
6253 	return err;
6254 }
6255 
6256 static const struct got_error *
6257 cmd_tag(int argc, char *argv[])
6258 {
6259 	const struct got_error *error = NULL;
6260 	struct got_repository *repo = NULL;
6261 	struct got_worktree *worktree = NULL;
6262 	char *cwd = NULL, *repo_path = NULL, *commit_id_str = NULL;
6263 	char *gitconfig_path = NULL;
6264 	const char *tag_name, *commit_id_arg = NULL, *tagmsg = NULL;
6265 	int ch, do_list = 0;
6266 
6267 	while ((ch = getopt(argc, argv, "c:m:r:l")) != -1) {
6268 		switch (ch) {
6269 		case 'c':
6270 			commit_id_arg = optarg;
6271 			break;
6272 		case 'm':
6273 			tagmsg = optarg;
6274 			break;
6275 		case 'r':
6276 			repo_path = realpath(optarg, NULL);
6277 			if (repo_path == NULL)
6278 				return got_error_from_errno2("realpath",
6279 				    optarg);
6280 			got_path_strip_trailing_slashes(repo_path);
6281 			break;
6282 		case 'l':
6283 			do_list = 1;
6284 			break;
6285 		default:
6286 			usage_tag();
6287 			/* NOTREACHED */
6288 		}
6289 	}
6290 
6291 	argc -= optind;
6292 	argv += optind;
6293 
6294 	if (do_list) {
6295 		if (commit_id_arg != NULL)
6296 			errx(1,
6297 			    "-c option can only be used when creating a tag");
6298 		if (tagmsg)
6299 			option_conflict('l', 'm');
6300 		if (argc > 0)
6301 			usage_tag();
6302 	} else if (argc != 1)
6303 		usage_tag();
6304 
6305 	tag_name = argv[0];
6306 
6307 #ifndef PROFILE
6308 	if (do_list) {
6309 		if (pledge("stdio rpath wpath flock proc exec sendfd unveil",
6310 		    NULL) == -1)
6311 			err(1, "pledge");
6312 	} else {
6313 		if (pledge("stdio rpath wpath cpath fattr flock proc exec "
6314 		    "sendfd unveil", NULL) == -1)
6315 			err(1, "pledge");
6316 	}
6317 #endif
6318 	cwd = getcwd(NULL, 0);
6319 	if (cwd == NULL) {
6320 		error = got_error_from_errno("getcwd");
6321 		goto done;
6322 	}
6323 
6324 	if (repo_path == NULL) {
6325 		error = got_worktree_open(&worktree, cwd);
6326 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6327 			goto done;
6328 		else
6329 			error = NULL;
6330 		if (worktree) {
6331 			repo_path =
6332 			    strdup(got_worktree_get_repo_path(worktree));
6333 			if (repo_path == NULL)
6334 				error = got_error_from_errno("strdup");
6335 			if (error)
6336 				goto done;
6337 		} else {
6338 			repo_path = strdup(cwd);
6339 			if (repo_path == NULL) {
6340 				error = got_error_from_errno("strdup");
6341 				goto done;
6342 			}
6343 		}
6344 	}
6345 
6346 	if (do_list) {
6347 		error = got_repo_open(&repo, repo_path, NULL);
6348 		if (error != NULL)
6349 			goto done;
6350 		error = apply_unveil(got_repo_get_path(repo), 1, NULL);
6351 		if (error)
6352 			goto done;
6353 		error = list_tags(repo, worktree);
6354 	} else {
6355 		error = get_gitconfig_path(&gitconfig_path);
6356 		if (error)
6357 			goto done;
6358 		error = got_repo_open(&repo, repo_path, gitconfig_path);
6359 		if (error != NULL)
6360 			goto done;
6361 
6362 		if (tagmsg) {
6363 			error = apply_unveil(got_repo_get_path(repo), 0, NULL);
6364 			if (error)
6365 				goto done;
6366 		}
6367 
6368 		if (commit_id_arg == NULL) {
6369 			struct got_reference *head_ref;
6370 			struct got_object_id *commit_id;
6371 			error = got_ref_open(&head_ref, repo,
6372 			    worktree ? got_worktree_get_head_ref_name(worktree)
6373 			    : GOT_REF_HEAD, 0);
6374 			if (error)
6375 				goto done;
6376 			error = got_ref_resolve(&commit_id, repo, head_ref);
6377 			got_ref_close(head_ref);
6378 			if (error)
6379 				goto done;
6380 			error = got_object_id_str(&commit_id_str, commit_id);
6381 			free(commit_id);
6382 			if (error)
6383 				goto done;
6384 		}
6385 
6386 		error = add_tag(repo, worktree, tag_name,
6387 		    commit_id_str ? commit_id_str : commit_id_arg, tagmsg);
6388 	}
6389 done:
6390 	if (repo)
6391 		got_repo_close(repo);
6392 	if (worktree)
6393 		got_worktree_close(worktree);
6394 	free(cwd);
6395 	free(repo_path);
6396 	free(gitconfig_path);
6397 	free(commit_id_str);
6398 	return error;
6399 }
6400 
6401 __dead static void
6402 usage_add(void)
6403 {
6404 	fprintf(stderr, "usage: %s add [-R] [-I] path ...\n",
6405 	    getprogname());
6406 	exit(1);
6407 }
6408 
6409 static const struct got_error *
6410 add_progress(void *arg, unsigned char status, const char *path)
6411 {
6412 	while (path[0] == '/')
6413 		path++;
6414 	printf("%c  %s\n", status, path);
6415 	return NULL;
6416 }
6417 
6418 static const struct got_error *
6419 cmd_add(int argc, char *argv[])
6420 {
6421 	const struct got_error *error = NULL;
6422 	struct got_repository *repo = NULL;
6423 	struct got_worktree *worktree = NULL;
6424 	char *cwd = NULL;
6425 	struct got_pathlist_head paths;
6426 	struct got_pathlist_entry *pe;
6427 	int ch, can_recurse = 0, no_ignores = 0;
6428 
6429 	TAILQ_INIT(&paths);
6430 
6431 	while ((ch = getopt(argc, argv, "IR")) != -1) {
6432 		switch (ch) {
6433 		case 'I':
6434 			no_ignores = 1;
6435 			break;
6436 		case 'R':
6437 			can_recurse = 1;
6438 			break;
6439 		default:
6440 			usage_add();
6441 			/* NOTREACHED */
6442 		}
6443 	}
6444 
6445 	argc -= optind;
6446 	argv += optind;
6447 
6448 #ifndef PROFILE
6449 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
6450 	    NULL) == -1)
6451 		err(1, "pledge");
6452 #endif
6453 	if (argc < 1)
6454 		usage_add();
6455 
6456 	cwd = getcwd(NULL, 0);
6457 	if (cwd == NULL) {
6458 		error = got_error_from_errno("getcwd");
6459 		goto done;
6460 	}
6461 
6462 	error = got_worktree_open(&worktree, cwd);
6463 	if (error) {
6464 		if (error->code == GOT_ERR_NOT_WORKTREE)
6465 			error = wrap_not_worktree_error(error, "add", cwd);
6466 		goto done;
6467 	}
6468 
6469 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
6470 	    NULL);
6471 	if (error != NULL)
6472 		goto done;
6473 
6474 	error = apply_unveil(got_repo_get_path(repo), 1,
6475 	    got_worktree_get_root_path(worktree));
6476 	if (error)
6477 		goto done;
6478 
6479 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
6480 	if (error)
6481 		goto done;
6482 
6483 	if (!can_recurse && no_ignores) {
6484 		error = got_error_msg(GOT_ERR_BAD_PATH,
6485 		    "disregarding ignores requires -R option");
6486 		goto done;
6487 
6488 	}
6489 
6490 	if (!can_recurse) {
6491 		char *ondisk_path;
6492 		struct stat sb;
6493 		TAILQ_FOREACH(pe, &paths, entry) {
6494 			if (asprintf(&ondisk_path, "%s/%s",
6495 			    got_worktree_get_root_path(worktree),
6496 			    pe->path) == -1) {
6497 				error = got_error_from_errno("asprintf");
6498 				goto done;
6499 			}
6500 			if (lstat(ondisk_path, &sb) == -1) {
6501 				if (errno == ENOENT) {
6502 					free(ondisk_path);
6503 					continue;
6504 				}
6505 				error = got_error_from_errno2("lstat",
6506 				    ondisk_path);
6507 				free(ondisk_path);
6508 				goto done;
6509 			}
6510 			free(ondisk_path);
6511 			if (S_ISDIR(sb.st_mode)) {
6512 				error = got_error_msg(GOT_ERR_BAD_PATH,
6513 				    "adding directories requires -R option");
6514 				goto done;
6515 			}
6516 		}
6517 	}
6518 
6519 	error = got_worktree_schedule_add(worktree, &paths, add_progress,
6520 	    NULL, repo, no_ignores);
6521 done:
6522 	if (repo)
6523 		got_repo_close(repo);
6524 	if (worktree)
6525 		got_worktree_close(worktree);
6526 	TAILQ_FOREACH(pe, &paths, entry)
6527 		free((char *)pe->path);
6528 	got_pathlist_free(&paths);
6529 	free(cwd);
6530 	return error;
6531 }
6532 
6533 __dead static void
6534 usage_remove(void)
6535 {
6536 	fprintf(stderr, "usage: %s remove [-f] [-k] [-R] [-s status-codes] "
6537 	    "path ...\n", getprogname());
6538 	exit(1);
6539 }
6540 
6541 static const struct got_error *
6542 print_remove_status(void *arg, unsigned char status,
6543     unsigned char staged_status, const char *path)
6544 {
6545 	while (path[0] == '/')
6546 		path++;
6547 	if (status == GOT_STATUS_NONEXISTENT)
6548 		return NULL;
6549 	if (status == staged_status && (status == GOT_STATUS_DELETE))
6550 		status = GOT_STATUS_NO_CHANGE;
6551 	printf("%c%c %s\n", status, staged_status, path);
6552 	return NULL;
6553 }
6554 
6555 static const struct got_error *
6556 cmd_remove(int argc, char *argv[])
6557 {
6558 	const struct got_error *error = NULL;
6559 	struct got_worktree *worktree = NULL;
6560 	struct got_repository *repo = NULL;
6561 	const char *status_codes = NULL;
6562 	char *cwd = NULL;
6563 	struct got_pathlist_head paths;
6564 	struct got_pathlist_entry *pe;
6565 	int ch, delete_local_mods = 0, can_recurse = 0, keep_on_disk = 0, i;
6566 
6567 	TAILQ_INIT(&paths);
6568 
6569 	while ((ch = getopt(argc, argv, "fkRs:")) != -1) {
6570 		switch (ch) {
6571 		case 'f':
6572 			delete_local_mods = 1;
6573 			break;
6574 		case 'k':
6575 			keep_on_disk = 1;
6576 			break;
6577 		case 'R':
6578 			can_recurse = 1;
6579 			break;
6580 		case 's':
6581 			for (i = 0; i < strlen(optarg); i++) {
6582 				switch (optarg[i]) {
6583 				case GOT_STATUS_MODIFY:
6584 					delete_local_mods = 1;
6585 					break;
6586 				case GOT_STATUS_MISSING:
6587 					break;
6588 				default:
6589 					errx(1, "invalid status code '%c'",
6590 					    optarg[i]);
6591 				}
6592 			}
6593 			status_codes = optarg;
6594 			break;
6595 		default:
6596 			usage_remove();
6597 			/* NOTREACHED */
6598 		}
6599 	}
6600 
6601 	argc -= optind;
6602 	argv += optind;
6603 
6604 #ifndef PROFILE
6605 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
6606 	    NULL) == -1)
6607 		err(1, "pledge");
6608 #endif
6609 	if (argc < 1)
6610 		usage_remove();
6611 
6612 	cwd = getcwd(NULL, 0);
6613 	if (cwd == NULL) {
6614 		error = got_error_from_errno("getcwd");
6615 		goto done;
6616 	}
6617 	error = got_worktree_open(&worktree, cwd);
6618 	if (error) {
6619 		if (error->code == GOT_ERR_NOT_WORKTREE)
6620 			error = wrap_not_worktree_error(error, "remove", cwd);
6621 		goto done;
6622 	}
6623 
6624 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
6625 	    NULL);
6626 	if (error)
6627 		goto done;
6628 
6629 	error = apply_unveil(got_repo_get_path(repo), 1,
6630 	    got_worktree_get_root_path(worktree));
6631 	if (error)
6632 		goto done;
6633 
6634 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
6635 	if (error)
6636 		goto done;
6637 
6638 	if (!can_recurse) {
6639 		char *ondisk_path;
6640 		struct stat sb;
6641 		TAILQ_FOREACH(pe, &paths, entry) {
6642 			if (asprintf(&ondisk_path, "%s/%s",
6643 			    got_worktree_get_root_path(worktree),
6644 			    pe->path) == -1) {
6645 				error = got_error_from_errno("asprintf");
6646 				goto done;
6647 			}
6648 			if (lstat(ondisk_path, &sb) == -1) {
6649 				if (errno == ENOENT) {
6650 					free(ondisk_path);
6651 					continue;
6652 				}
6653 				error = got_error_from_errno2("lstat",
6654 				    ondisk_path);
6655 				free(ondisk_path);
6656 				goto done;
6657 			}
6658 			free(ondisk_path);
6659 			if (S_ISDIR(sb.st_mode)) {
6660 				error = got_error_msg(GOT_ERR_BAD_PATH,
6661 				    "removing directories requires -R option");
6662 				goto done;
6663 			}
6664 		}
6665 	}
6666 
6667 	error = got_worktree_schedule_delete(worktree, &paths,
6668 	    delete_local_mods, status_codes, print_remove_status, NULL,
6669 	    repo, keep_on_disk);
6670 done:
6671 	if (repo)
6672 		got_repo_close(repo);
6673 	if (worktree)
6674 		got_worktree_close(worktree);
6675 	TAILQ_FOREACH(pe, &paths, entry)
6676 		free((char *)pe->path);
6677 	got_pathlist_free(&paths);
6678 	free(cwd);
6679 	return error;
6680 }
6681 
6682 __dead static void
6683 usage_revert(void)
6684 {
6685 	fprintf(stderr, "usage: %s revert [-p] [-F response-script] [-R] "
6686 	    "path ...\n", getprogname());
6687 	exit(1);
6688 }
6689 
6690 static const struct got_error *
6691 revert_progress(void *arg, unsigned char status, const char *path)
6692 {
6693 	if (status == GOT_STATUS_UNVERSIONED)
6694 		return NULL;
6695 
6696 	while (path[0] == '/')
6697 		path++;
6698 	printf("%c  %s\n", status, path);
6699 	return NULL;
6700 }
6701 
6702 struct choose_patch_arg {
6703 	FILE *patch_script_file;
6704 	const char *action;
6705 };
6706 
6707 static const struct got_error *
6708 show_change(unsigned char status, const char *path, FILE *patch_file, int n,
6709     int nchanges, const char *action)
6710 {
6711 	char *line = NULL;
6712 	size_t linesize = 0;
6713 	ssize_t linelen;
6714 
6715 	switch (status) {
6716 	case GOT_STATUS_ADD:
6717 		printf("A  %s\n%s this addition? [y/n] ", path, action);
6718 		break;
6719 	case GOT_STATUS_DELETE:
6720 		printf("D  %s\n%s this deletion? [y/n] ", path, action);
6721 		break;
6722 	case GOT_STATUS_MODIFY:
6723 		if (fseek(patch_file, 0L, SEEK_SET) == -1)
6724 			return got_error_from_errno("fseek");
6725 		printf(GOT_COMMIT_SEP_STR);
6726 		while ((linelen = getline(&line, &linesize, patch_file)) != -1)
6727 			printf("%s", line);
6728 		if (ferror(patch_file))
6729 			return got_error_from_errno("getline");
6730 		printf(GOT_COMMIT_SEP_STR);
6731 		printf("M  %s (change %d of %d)\n%s this change? [y/n/q] ",
6732 		    path, n, nchanges, action);
6733 		break;
6734 	default:
6735 		return got_error_path(path, GOT_ERR_FILE_STATUS);
6736 	}
6737 
6738 	return NULL;
6739 }
6740 
6741 static const struct got_error *
6742 choose_patch(int *choice, void *arg, unsigned char status, const char *path,
6743     FILE *patch_file, int n, int nchanges)
6744 {
6745 	const struct got_error *err = NULL;
6746 	char *line = NULL;
6747 	size_t linesize = 0;
6748 	ssize_t linelen;
6749 	int resp = ' ';
6750 	struct choose_patch_arg *a = arg;
6751 
6752 	*choice = GOT_PATCH_CHOICE_NONE;
6753 
6754 	if (a->patch_script_file) {
6755 		char *nl;
6756 		err = show_change(status, path, patch_file, n, nchanges,
6757 		    a->action);
6758 		if (err)
6759 			return err;
6760 		linelen = getline(&line, &linesize, a->patch_script_file);
6761 		if (linelen == -1) {
6762 			if (ferror(a->patch_script_file))
6763 				return got_error_from_errno("getline");
6764 			return NULL;
6765 		}
6766 		nl = strchr(line, '\n');
6767 		if (nl)
6768 			*nl = '\0';
6769 		if (strcmp(line, "y") == 0) {
6770 			*choice = GOT_PATCH_CHOICE_YES;
6771 			printf("y\n");
6772 		} else if (strcmp(line, "n") == 0) {
6773 			*choice = GOT_PATCH_CHOICE_NO;
6774 			printf("n\n");
6775 		} else if (strcmp(line, "q") == 0 &&
6776 		    status == GOT_STATUS_MODIFY) {
6777 			*choice = GOT_PATCH_CHOICE_QUIT;
6778 			printf("q\n");
6779 		} else
6780 			printf("invalid response '%s'\n", line);
6781 		free(line);
6782 		return NULL;
6783 	}
6784 
6785 	while (resp != 'y' && resp != 'n' && resp != 'q') {
6786 		err = show_change(status, path, patch_file, n, nchanges,
6787 		    a->action);
6788 		if (err)
6789 			return err;
6790 		resp = getchar();
6791 		if (resp == '\n')
6792 			resp = getchar();
6793 		if (status == GOT_STATUS_MODIFY) {
6794 			if (resp != 'y' && resp != 'n' && resp != 'q') {
6795 				printf("invalid response '%c'\n", resp);
6796 				resp = ' ';
6797 			}
6798 		} else if (resp != 'y' && resp != 'n') {
6799 				printf("invalid response '%c'\n", resp);
6800 				resp = ' ';
6801 		}
6802 	}
6803 
6804 	if (resp == 'y')
6805 		*choice = GOT_PATCH_CHOICE_YES;
6806 	else if (resp == 'n')
6807 		*choice = GOT_PATCH_CHOICE_NO;
6808 	else if (resp == 'q' && status == GOT_STATUS_MODIFY)
6809 		*choice = GOT_PATCH_CHOICE_QUIT;
6810 
6811 	return NULL;
6812 }
6813 
6814 
6815 static const struct got_error *
6816 cmd_revert(int argc, char *argv[])
6817 {
6818 	const struct got_error *error = NULL;
6819 	struct got_worktree *worktree = NULL;
6820 	struct got_repository *repo = NULL;
6821 	char *cwd = NULL, *path = NULL;
6822 	struct got_pathlist_head paths;
6823 	struct got_pathlist_entry *pe;
6824 	int ch, can_recurse = 0, pflag = 0;
6825 	FILE *patch_script_file = NULL;
6826 	const char *patch_script_path = NULL;
6827 	struct choose_patch_arg cpa;
6828 
6829 	TAILQ_INIT(&paths);
6830 
6831 	while ((ch = getopt(argc, argv, "pF:R")) != -1) {
6832 		switch (ch) {
6833 		case 'p':
6834 			pflag = 1;
6835 			break;
6836 		case 'F':
6837 			patch_script_path = optarg;
6838 			break;
6839 		case 'R':
6840 			can_recurse = 1;
6841 			break;
6842 		default:
6843 			usage_revert();
6844 			/* NOTREACHED */
6845 		}
6846 	}
6847 
6848 	argc -= optind;
6849 	argv += optind;
6850 
6851 #ifndef PROFILE
6852 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
6853 	    "unveil", NULL) == -1)
6854 		err(1, "pledge");
6855 #endif
6856 	if (argc < 1)
6857 		usage_revert();
6858 	if (patch_script_path && !pflag)
6859 		errx(1, "-F option can only be used together with -p option");
6860 
6861 	cwd = getcwd(NULL, 0);
6862 	if (cwd == NULL) {
6863 		error = got_error_from_errno("getcwd");
6864 		goto done;
6865 	}
6866 	error = got_worktree_open(&worktree, cwd);
6867 	if (error) {
6868 		if (error->code == GOT_ERR_NOT_WORKTREE)
6869 			error = wrap_not_worktree_error(error, "revert", cwd);
6870 		goto done;
6871 	}
6872 
6873 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
6874 	    NULL);
6875 	if (error != NULL)
6876 		goto done;
6877 
6878 	if (patch_script_path) {
6879 		patch_script_file = fopen(patch_script_path, "r");
6880 		if (patch_script_file == NULL) {
6881 			error = got_error_from_errno2("fopen",
6882 			    patch_script_path);
6883 			goto done;
6884 		}
6885 	}
6886 	error = apply_unveil(got_repo_get_path(repo), 1,
6887 	    got_worktree_get_root_path(worktree));
6888 	if (error)
6889 		goto done;
6890 
6891 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
6892 	if (error)
6893 		goto done;
6894 
6895 	if (!can_recurse) {
6896 		char *ondisk_path;
6897 		struct stat sb;
6898 		TAILQ_FOREACH(pe, &paths, entry) {
6899 			if (asprintf(&ondisk_path, "%s/%s",
6900 			    got_worktree_get_root_path(worktree),
6901 			    pe->path) == -1) {
6902 				error = got_error_from_errno("asprintf");
6903 				goto done;
6904 			}
6905 			if (lstat(ondisk_path, &sb) == -1) {
6906 				if (errno == ENOENT) {
6907 					free(ondisk_path);
6908 					continue;
6909 				}
6910 				error = got_error_from_errno2("lstat",
6911 				    ondisk_path);
6912 				free(ondisk_path);
6913 				goto done;
6914 			}
6915 			free(ondisk_path);
6916 			if (S_ISDIR(sb.st_mode)) {
6917 				error = got_error_msg(GOT_ERR_BAD_PATH,
6918 				    "reverting directories requires -R option");
6919 				goto done;
6920 			}
6921 		}
6922 	}
6923 
6924 	cpa.patch_script_file = patch_script_file;
6925 	cpa.action = "revert";
6926 	error = got_worktree_revert(worktree, &paths, revert_progress, NULL,
6927 	    pflag ? choose_patch : NULL, &cpa, repo);
6928 done:
6929 	if (patch_script_file && fclose(patch_script_file) == EOF &&
6930 	    error == NULL)
6931 		error = got_error_from_errno2("fclose", patch_script_path);
6932 	if (repo)
6933 		got_repo_close(repo);
6934 	if (worktree)
6935 		got_worktree_close(worktree);
6936 	free(path);
6937 	free(cwd);
6938 	return error;
6939 }
6940 
6941 __dead static void
6942 usage_commit(void)
6943 {
6944 	fprintf(stderr, "usage: %s commit [-F path] [-m msg] [-N] [-S] "
6945 	    "[path ...]\n", getprogname());
6946 	exit(1);
6947 }
6948 
6949 struct collect_commit_logmsg_arg {
6950 	const char *cmdline_log;
6951 	const char *prepared_log;
6952 	int non_interactive;
6953 	const char *editor;
6954 	const char *worktree_path;
6955 	const char *branch_name;
6956 	const char *repo_path;
6957 	char *logmsg_path;
6958 
6959 };
6960 
6961 static const struct got_error *
6962 read_prepared_logmsg(char **logmsg, const char *path)
6963 {
6964 	const struct got_error *err = NULL;
6965 	FILE *f = NULL;
6966 	struct stat sb;
6967 	size_t r;
6968 
6969 	*logmsg = NULL;
6970 	memset(&sb, 0, sizeof(sb));
6971 
6972 	f = fopen(path, "r");
6973 	if (f == NULL)
6974 		return got_error_from_errno2("fopen", path);
6975 
6976 	if (fstat(fileno(f), &sb) == -1) {
6977 		err = got_error_from_errno2("fstat", path);
6978 		goto done;
6979 	}
6980 	if (sb.st_size == 0) {
6981 		err = got_error(GOT_ERR_COMMIT_MSG_EMPTY);
6982 		goto done;
6983 	}
6984 
6985 	*logmsg = malloc(sb.st_size + 1);
6986 	if (*logmsg == NULL) {
6987 		err = got_error_from_errno("malloc");
6988 		goto done;
6989 	}
6990 
6991 	r = fread(*logmsg, 1, sb.st_size, f);
6992 	if (r != sb.st_size) {
6993 		if (ferror(f))
6994 			err = got_error_from_errno2("fread", path);
6995 		else
6996 			err = got_error(GOT_ERR_IO);
6997 		goto done;
6998 	}
6999 	(*logmsg)[sb.st_size] = '\0';
7000 done:
7001 	if (fclose(f) == EOF && err == NULL)
7002 		err = got_error_from_errno2("fclose", path);
7003 	if (err) {
7004 		free(*logmsg);
7005 		*logmsg = NULL;
7006 	}
7007 	return err;
7008 	
7009 }
7010 
7011 static const struct got_error *
7012 collect_commit_logmsg(struct got_pathlist_head *commitable_paths, char **logmsg,
7013     void *arg)
7014 {
7015 	char *initial_content = NULL;
7016 	struct got_pathlist_entry *pe;
7017 	const struct got_error *err = NULL;
7018 	char *template = NULL;
7019 	struct collect_commit_logmsg_arg *a = arg;
7020 	int initial_content_len;
7021 	int fd = -1;
7022 	size_t len;
7023 
7024 	/* if a message was specified on the command line, just use it */
7025 	if (a->cmdline_log != NULL && strlen(a->cmdline_log) != 0) {
7026 		len = strlen(a->cmdline_log) + 1;
7027 		*logmsg = malloc(len + 1);
7028 		if (*logmsg == NULL)
7029 			return got_error_from_errno("malloc");
7030 		strlcpy(*logmsg, a->cmdline_log, len);
7031 		return NULL;
7032 	} else if (a->prepared_log != NULL && a->non_interactive)
7033 		return read_prepared_logmsg(logmsg, a->prepared_log);
7034 
7035 	if (asprintf(&template, "%s/logmsg", a->worktree_path) == -1)
7036 		return got_error_from_errno("asprintf");
7037 
7038 	err = got_opentemp_named_fd(&a->logmsg_path, &fd, template);
7039 	if (err)
7040 		goto done;
7041 
7042 	if (a->prepared_log) {
7043 		char *msg;
7044 		err = read_prepared_logmsg(&msg, a->prepared_log);
7045 		if (err)
7046 			goto done;
7047 		if (write(fd, msg, strlen(msg)) == -1) {
7048 			err = got_error_from_errno2("write", a->logmsg_path);
7049 			free(msg);
7050 			goto done;
7051 		}
7052 		free(msg);
7053 	}
7054 
7055 	initial_content_len = asprintf(&initial_content,
7056 	    "\n# changes to be committed on branch %s:\n",
7057 	    a->branch_name);
7058 	if (initial_content_len == -1) {
7059 		err = got_error_from_errno("asprintf");
7060 		goto done;
7061 	}
7062 
7063 	if (write(fd, initial_content, initial_content_len) == -1) {
7064 		err = got_error_from_errno2("write", a->logmsg_path);
7065 		goto done;
7066 	}
7067 
7068 	TAILQ_FOREACH(pe, commitable_paths, entry) {
7069 		struct got_commitable *ct = pe->data;
7070 		dprintf(fd, "#  %c  %s\n",
7071 		    got_commitable_get_status(ct),
7072 		    got_commitable_get_path(ct));
7073 	}
7074 
7075 	err = edit_logmsg(logmsg, a->editor, a->logmsg_path, initial_content,
7076 	    initial_content_len, a->prepared_log ? 0 : 1);
7077 done:
7078 	free(initial_content);
7079 	free(template);
7080 
7081 	if (fd != -1 && close(fd) == -1 && err == NULL)
7082 		err = got_error_from_errno2("close", a->logmsg_path);
7083 
7084 	/* Editor is done; we can now apply unveil(2) */
7085 	if (err == NULL)
7086 		err = apply_unveil(a->repo_path, 0, a->worktree_path);
7087 	if (err) {
7088 		free(*logmsg);
7089 		*logmsg = NULL;
7090 	}
7091 	return err;
7092 }
7093 
7094 static const struct got_error *
7095 cmd_commit(int argc, char *argv[])
7096 {
7097 	const struct got_error *error = NULL;
7098 	struct got_worktree *worktree = NULL;
7099 	struct got_repository *repo = NULL;
7100 	char *cwd = NULL, *id_str = NULL;
7101 	struct got_object_id *id = NULL;
7102 	const char *logmsg = NULL;
7103 	char *prepared_logmsg = NULL;
7104 	struct collect_commit_logmsg_arg cl_arg;
7105 	char *gitconfig_path = NULL, *editor = NULL, *author = NULL;
7106 	int ch, rebase_in_progress, histedit_in_progress, preserve_logmsg = 0;
7107 	int allow_bad_symlinks = 0, non_interactive = 0;
7108 	struct got_pathlist_head paths;
7109 
7110 	TAILQ_INIT(&paths);
7111 	cl_arg.logmsg_path = NULL;
7112 
7113 	while ((ch = getopt(argc, argv, "F:m:NS")) != -1) {
7114 		switch (ch) {
7115 		case 'F':
7116 			if (logmsg != NULL)
7117 				option_conflict('F', 'm');
7118 			prepared_logmsg = realpath(optarg, NULL);
7119 			if (prepared_logmsg == NULL)
7120 				return got_error_from_errno2("realpath",
7121 				    optarg);
7122 			break;
7123 		case 'm':
7124 			if (prepared_logmsg)
7125 				option_conflict('m', 'F');
7126 			logmsg = optarg;
7127 			break;
7128 		case 'N':
7129 			non_interactive = 1;
7130 			break;
7131 		case 'S':
7132 			allow_bad_symlinks = 1;
7133 			break;
7134 		default:
7135 			usage_commit();
7136 			/* NOTREACHED */
7137 		}
7138 	}
7139 
7140 	argc -= optind;
7141 	argv += optind;
7142 
7143 #ifndef PROFILE
7144 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
7145 	    "unveil", NULL) == -1)
7146 		err(1, "pledge");
7147 #endif
7148 	cwd = getcwd(NULL, 0);
7149 	if (cwd == NULL) {
7150 		error = got_error_from_errno("getcwd");
7151 		goto done;
7152 	}
7153 	error = got_worktree_open(&worktree, cwd);
7154 	if (error) {
7155 		if (error->code == GOT_ERR_NOT_WORKTREE)
7156 			error = wrap_not_worktree_error(error, "commit", cwd);
7157 		goto done;
7158 	}
7159 
7160 	error = got_worktree_rebase_in_progress(&rebase_in_progress, worktree);
7161 	if (error)
7162 		goto done;
7163 	if (rebase_in_progress) {
7164 		error = got_error(GOT_ERR_REBASING);
7165 		goto done;
7166 	}
7167 
7168 	error = got_worktree_histedit_in_progress(&histedit_in_progress,
7169 	    worktree);
7170 	if (error)
7171 		goto done;
7172 
7173 	error = get_gitconfig_path(&gitconfig_path);
7174 	if (error)
7175 		goto done;
7176 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
7177 	    gitconfig_path);
7178 	if (error != NULL)
7179 		goto done;
7180 
7181 	error = get_author(&author, repo, worktree);
7182 	if (error)
7183 		return error;
7184 
7185 	/*
7186 	 * unveil(2) traverses exec(2); if an editor is used we have
7187 	 * to apply unveil after the log message has been written.
7188 	 */
7189 	if (logmsg == NULL || strlen(logmsg) == 0)
7190 		error = get_editor(&editor);
7191 	else
7192 		error = apply_unveil(got_repo_get_path(repo), 0,
7193 		    got_worktree_get_root_path(worktree));
7194 	if (error)
7195 		goto done;
7196 
7197 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
7198 	if (error)
7199 		goto done;
7200 
7201 	cl_arg.editor = editor;
7202 	cl_arg.cmdline_log = logmsg;
7203 	cl_arg.prepared_log = prepared_logmsg;
7204 	cl_arg.non_interactive = non_interactive;
7205 	cl_arg.worktree_path = got_worktree_get_root_path(worktree);
7206 	cl_arg.branch_name = got_worktree_get_head_ref_name(worktree);
7207 	if (!histedit_in_progress) {
7208 		if (strncmp(cl_arg.branch_name, "refs/heads/", 11) != 0) {
7209 			error = got_error(GOT_ERR_COMMIT_BRANCH);
7210 			goto done;
7211 		}
7212 		cl_arg.branch_name += 11;
7213 	}
7214 	cl_arg.repo_path = got_repo_get_path(repo);
7215 	error = got_worktree_commit(&id, worktree, &paths, author, NULL,
7216 	    allow_bad_symlinks, collect_commit_logmsg, &cl_arg,
7217 	    print_status, NULL, repo);
7218 	if (error) {
7219 		if (error->code != GOT_ERR_COMMIT_MSG_EMPTY &&
7220 		    cl_arg.logmsg_path != NULL)
7221 			preserve_logmsg = 1;
7222 		goto done;
7223 	}
7224 
7225 	error = got_object_id_str(&id_str, id);
7226 	if (error)
7227 		goto done;
7228 	printf("Created commit %s\n", id_str);
7229 done:
7230 	if (preserve_logmsg) {
7231 		fprintf(stderr, "%s: log message preserved in %s\n",
7232 		    getprogname(), cl_arg.logmsg_path);
7233 	} else if (cl_arg.logmsg_path && unlink(cl_arg.logmsg_path) == -1 &&
7234 	    error == NULL)
7235 		error = got_error_from_errno2("unlink", cl_arg.logmsg_path);
7236 	free(cl_arg.logmsg_path);
7237 	if (repo)
7238 		got_repo_close(repo);
7239 	if (worktree)
7240 		got_worktree_close(worktree);
7241 	free(cwd);
7242 	free(id_str);
7243 	free(gitconfig_path);
7244 	free(editor);
7245 	free(author);
7246 	free(prepared_logmsg);
7247 	return error;
7248 }
7249 
7250 __dead static void
7251 usage_cherrypick(void)
7252 {
7253 	fprintf(stderr, "usage: %s cherrypick commit-id\n", getprogname());
7254 	exit(1);
7255 }
7256 
7257 static const struct got_error *
7258 cmd_cherrypick(int argc, char *argv[])
7259 {
7260 	const struct got_error *error = NULL;
7261 	struct got_worktree *worktree = NULL;
7262 	struct got_repository *repo = NULL;
7263 	char *cwd = NULL, *commit_id_str = NULL;
7264 	struct got_object_id *commit_id = NULL;
7265 	struct got_commit_object *commit = NULL;
7266 	struct got_object_qid *pid;
7267 	struct got_reference *head_ref = NULL;
7268 	int ch;
7269 	struct got_update_progress_arg upa;
7270 
7271 	while ((ch = getopt(argc, argv, "")) != -1) {
7272 		switch (ch) {
7273 		default:
7274 			usage_cherrypick();
7275 			/* NOTREACHED */
7276 		}
7277 	}
7278 
7279 	argc -= optind;
7280 	argv += optind;
7281 
7282 #ifndef PROFILE
7283 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
7284 	    "unveil", NULL) == -1)
7285 		err(1, "pledge");
7286 #endif
7287 	if (argc != 1)
7288 		usage_cherrypick();
7289 
7290 	cwd = getcwd(NULL, 0);
7291 	if (cwd == NULL) {
7292 		error = got_error_from_errno("getcwd");
7293 		goto done;
7294 	}
7295 	error = got_worktree_open(&worktree, cwd);
7296 	if (error) {
7297 		if (error->code == GOT_ERR_NOT_WORKTREE)
7298 			error = wrap_not_worktree_error(error, "cherrypick",
7299 			    cwd);
7300 		goto done;
7301 	}
7302 
7303 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
7304 	    NULL);
7305 	if (error != NULL)
7306 		goto done;
7307 
7308 	error = apply_unveil(got_repo_get_path(repo), 0,
7309 	    got_worktree_get_root_path(worktree));
7310 	if (error)
7311 		goto done;
7312 
7313 	error = got_repo_match_object_id_prefix(&commit_id, argv[0],
7314 	    GOT_OBJ_TYPE_COMMIT, repo);
7315 	if (error != NULL) {
7316 		struct got_reference *ref;
7317 		if (error->code != GOT_ERR_BAD_OBJ_ID_STR)
7318 			goto done;
7319 		error = got_ref_open(&ref, repo, argv[0], 0);
7320 		if (error != NULL)
7321 			goto done;
7322 		error = got_ref_resolve(&commit_id, repo, ref);
7323 		got_ref_close(ref);
7324 		if (error != NULL)
7325 			goto done;
7326 	}
7327 	error = got_object_id_str(&commit_id_str, commit_id);
7328 	if (error)
7329 		goto done;
7330 
7331 	error = got_ref_open(&head_ref, repo,
7332 	    got_worktree_get_head_ref_name(worktree), 0);
7333 	if (error != NULL)
7334 		goto done;
7335 
7336 	error = check_same_branch(commit_id, head_ref, NULL, repo);
7337 	if (error) {
7338 		if (error->code != GOT_ERR_ANCESTRY)
7339 			goto done;
7340 		error = NULL;
7341 	} else {
7342 		error = got_error(GOT_ERR_SAME_BRANCH);
7343 		goto done;
7344 	}
7345 
7346 	error = got_object_open_as_commit(&commit, repo, commit_id);
7347 	if (error)
7348 		goto done;
7349 	pid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
7350 	memset(&upa, 0, sizeof(upa));
7351 	error = got_worktree_merge_files(worktree, pid ? pid->id : NULL,
7352 	    commit_id, repo, update_progress, &upa, check_cancelled,
7353 	    NULL);
7354 	if (error != NULL)
7355 		goto done;
7356 
7357 	if (upa.did_something)
7358 		printf("Merged commit %s\n", commit_id_str);
7359 	print_update_progress_stats(&upa);
7360 done:
7361 	if (commit)
7362 		got_object_commit_close(commit);
7363 	free(commit_id_str);
7364 	if (head_ref)
7365 		got_ref_close(head_ref);
7366 	if (worktree)
7367 		got_worktree_close(worktree);
7368 	if (repo)
7369 		got_repo_close(repo);
7370 	return error;
7371 }
7372 
7373 __dead static void
7374 usage_backout(void)
7375 {
7376 	fprintf(stderr, "usage: %s backout commit-id\n", getprogname());
7377 	exit(1);
7378 }
7379 
7380 static const struct got_error *
7381 cmd_backout(int argc, char *argv[])
7382 {
7383 	const struct got_error *error = NULL;
7384 	struct got_worktree *worktree = NULL;
7385 	struct got_repository *repo = NULL;
7386 	char *cwd = NULL, *commit_id_str = NULL;
7387 	struct got_object_id *commit_id = NULL;
7388 	struct got_commit_object *commit = NULL;
7389 	struct got_object_qid *pid;
7390 	struct got_reference *head_ref = NULL;
7391 	int ch;
7392 	struct got_update_progress_arg upa;
7393 
7394 	while ((ch = getopt(argc, argv, "")) != -1) {
7395 		switch (ch) {
7396 		default:
7397 			usage_backout();
7398 			/* NOTREACHED */
7399 		}
7400 	}
7401 
7402 	argc -= optind;
7403 	argv += optind;
7404 
7405 #ifndef PROFILE
7406 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
7407 	    "unveil", NULL) == -1)
7408 		err(1, "pledge");
7409 #endif
7410 	if (argc != 1)
7411 		usage_backout();
7412 
7413 	cwd = getcwd(NULL, 0);
7414 	if (cwd == NULL) {
7415 		error = got_error_from_errno("getcwd");
7416 		goto done;
7417 	}
7418 	error = got_worktree_open(&worktree, cwd);
7419 	if (error) {
7420 		if (error->code == GOT_ERR_NOT_WORKTREE)
7421 			error = wrap_not_worktree_error(error, "backout", cwd);
7422 		goto done;
7423 	}
7424 
7425 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
7426 	    NULL);
7427 	if (error != NULL)
7428 		goto done;
7429 
7430 	error = apply_unveil(got_repo_get_path(repo), 0,
7431 	    got_worktree_get_root_path(worktree));
7432 	if (error)
7433 		goto done;
7434 
7435 	error = got_repo_match_object_id_prefix(&commit_id, argv[0],
7436 	    GOT_OBJ_TYPE_COMMIT, repo);
7437 	if (error != NULL) {
7438 		struct got_reference *ref;
7439 		if (error->code != GOT_ERR_BAD_OBJ_ID_STR)
7440 			goto done;
7441 		error = got_ref_open(&ref, repo, argv[0], 0);
7442 		if (error != NULL)
7443 			goto done;
7444 		error = got_ref_resolve(&commit_id, repo, ref);
7445 		got_ref_close(ref);
7446 		if (error != NULL)
7447 			goto done;
7448 	}
7449 	error = got_object_id_str(&commit_id_str, commit_id);
7450 	if (error)
7451 		goto done;
7452 
7453 	error = got_ref_open(&head_ref, repo,
7454 	    got_worktree_get_head_ref_name(worktree), 0);
7455 	if (error != NULL)
7456 		goto done;
7457 
7458 	error = check_same_branch(commit_id, head_ref, NULL, repo);
7459 	if (error)
7460 		goto done;
7461 
7462 	error = got_object_open_as_commit(&commit, repo, commit_id);
7463 	if (error)
7464 		goto done;
7465 	pid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
7466 	if (pid == NULL) {
7467 		error = got_error(GOT_ERR_ROOT_COMMIT);
7468 		goto done;
7469 	}
7470 
7471 	memset(&upa, 0, sizeof(upa));
7472 	error = got_worktree_merge_files(worktree, commit_id, pid->id, repo,
7473 	    update_progress, &upa, check_cancelled, NULL);
7474 	if (error != NULL)
7475 		goto done;
7476 
7477 	if (upa.did_something)
7478 		printf("Backed out commit %s\n", commit_id_str);
7479 	print_update_progress_stats(&upa);
7480 done:
7481 	if (commit)
7482 		got_object_commit_close(commit);
7483 	free(commit_id_str);
7484 	if (head_ref)
7485 		got_ref_close(head_ref);
7486 	if (worktree)
7487 		got_worktree_close(worktree);
7488 	if (repo)
7489 		got_repo_close(repo);
7490 	return error;
7491 }
7492 
7493 __dead static void
7494 usage_rebase(void)
7495 {
7496 	fprintf(stderr, "usage: %s rebase [-a] [-c] [-l] [branch]\n",
7497 	    getprogname());
7498 	exit(1);
7499 }
7500 
7501 void
7502 trim_logmsg(char *logmsg, int limit)
7503 {
7504 	char *nl;
7505 	size_t len;
7506 
7507 	len = strlen(logmsg);
7508 	if (len > limit)
7509 		len = limit;
7510 	logmsg[len] = '\0';
7511 	nl = strchr(logmsg, '\n');
7512 	if (nl)
7513 		*nl = '\0';
7514 }
7515 
7516 static const struct got_error *
7517 get_short_logmsg(char **logmsg, int limit, struct got_commit_object *commit)
7518 {
7519 	const struct got_error *err;
7520 	char *logmsg0 = NULL;
7521 	const char *s;
7522 
7523 	err = got_object_commit_get_logmsg(&logmsg0, commit);
7524 	if (err)
7525 		return err;
7526 
7527 	s = logmsg0;
7528 	while (isspace((unsigned char)s[0]))
7529 		s++;
7530 
7531 	*logmsg = strdup(s);
7532 	if (*logmsg == NULL) {
7533 		err = got_error_from_errno("strdup");
7534 		goto done;
7535 	}
7536 
7537 	trim_logmsg(*logmsg, limit);
7538 done:
7539 	free(logmsg0);
7540 	return err;
7541 }
7542 
7543 static const struct got_error *
7544 show_rebase_merge_conflict(struct got_object_id *id, struct got_repository *repo)
7545 {
7546 	const struct got_error *err;
7547 	struct got_commit_object *commit = NULL;
7548 	char *id_str = NULL, *logmsg = NULL;
7549 
7550 	err = got_object_open_as_commit(&commit, repo, id);
7551 	if (err)
7552 		return err;
7553 
7554 	err = got_object_id_str(&id_str, id);
7555 	if (err)
7556 		goto done;
7557 
7558 	id_str[12] = '\0';
7559 
7560 	err = get_short_logmsg(&logmsg, 42, commit);
7561 	if (err)
7562 		goto done;
7563 
7564 	printf("%s -> merge conflict: %s\n", id_str, logmsg);
7565 done:
7566 	free(id_str);
7567 	got_object_commit_close(commit);
7568 	free(logmsg);
7569 	return err;
7570 }
7571 
7572 static const struct got_error *
7573 show_rebase_progress(struct got_commit_object *commit,
7574     struct got_object_id *old_id, struct got_object_id *new_id)
7575 {
7576 	const struct got_error *err;
7577 	char *old_id_str = NULL, *new_id_str = NULL, *logmsg = NULL;
7578 
7579 	err = got_object_id_str(&old_id_str, old_id);
7580 	if (err)
7581 		goto done;
7582 
7583 	if (new_id) {
7584 		err = got_object_id_str(&new_id_str, new_id);
7585 		if (err)
7586 			goto done;
7587 	}
7588 
7589 	old_id_str[12] = '\0';
7590 	if (new_id_str)
7591 		new_id_str[12] = '\0';
7592 
7593 	err = get_short_logmsg(&logmsg, 42, commit);
7594 	if (err)
7595 		goto done;
7596 
7597 	printf("%s -> %s: %s\n", old_id_str,
7598 	    new_id_str ? new_id_str : "no-op change", logmsg);
7599 done:
7600 	free(old_id_str);
7601 	free(new_id_str);
7602 	free(logmsg);
7603 	return err;
7604 }
7605 
7606 static const struct got_error *
7607 rebase_complete(struct got_worktree *worktree, struct got_fileindex *fileindex,
7608     struct got_reference *branch, struct got_reference *new_base_branch,
7609     struct got_reference *tmp_branch, struct got_repository *repo,
7610     int create_backup)
7611 {
7612 	printf("Switching work tree to %s\n", got_ref_get_name(branch));
7613 	return got_worktree_rebase_complete(worktree, fileindex,
7614 	    new_base_branch, tmp_branch, branch, repo, create_backup);
7615 }
7616 
7617 static const struct got_error *
7618 rebase_commit(struct got_pathlist_head *merged_paths,
7619     struct got_worktree *worktree, struct got_fileindex *fileindex,
7620     struct got_reference *tmp_branch,
7621     struct got_object_id *commit_id, struct got_repository *repo)
7622 {
7623 	const struct got_error *error;
7624 	struct got_commit_object *commit;
7625 	struct got_object_id *new_commit_id;
7626 
7627 	error = got_object_open_as_commit(&commit, repo, commit_id);
7628 	if (error)
7629 		return error;
7630 
7631 	error = got_worktree_rebase_commit(&new_commit_id, merged_paths,
7632 	    worktree, fileindex, tmp_branch, commit, commit_id, repo);
7633 	if (error) {
7634 		if (error->code != GOT_ERR_COMMIT_NO_CHANGES)
7635 			goto done;
7636 		error = show_rebase_progress(commit, commit_id, NULL);
7637 	} else {
7638 		error = show_rebase_progress(commit, commit_id, new_commit_id);
7639 		free(new_commit_id);
7640 	}
7641 done:
7642 	got_object_commit_close(commit);
7643 	return error;
7644 }
7645 
7646 struct check_path_prefix_arg {
7647 	const char *path_prefix;
7648 	size_t len;
7649 	int errcode;
7650 };
7651 
7652 static const struct got_error *
7653 check_path_prefix_in_diff(void *arg, struct got_blob_object *blob1,
7654     struct got_blob_object *blob2, struct got_object_id *id1,
7655     struct got_object_id *id2, const char *path1, const char *path2,
7656     mode_t mode1, mode_t mode2, struct got_repository *repo)
7657 {
7658 	struct check_path_prefix_arg *a = arg;
7659 
7660 	if ((path1 && !got_path_is_child(path1, a->path_prefix, a->len)) ||
7661 	    (path2 && !got_path_is_child(path2, a->path_prefix, a->len)))
7662 		return got_error(a->errcode);
7663 
7664 	return NULL;
7665 }
7666 
7667 static const struct got_error *
7668 check_path_prefix(struct got_object_id *parent_id,
7669     struct got_object_id *commit_id, const char *path_prefix,
7670     int errcode, struct got_repository *repo)
7671 {
7672 	const struct got_error *err;
7673 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
7674 	struct got_commit_object *commit = NULL, *parent_commit = NULL;
7675 	struct check_path_prefix_arg cpp_arg;
7676 
7677 	if (got_path_is_root_dir(path_prefix))
7678 		return NULL;
7679 
7680 	err = got_object_open_as_commit(&commit, repo, commit_id);
7681 	if (err)
7682 		goto done;
7683 
7684 	err = got_object_open_as_commit(&parent_commit, repo, parent_id);
7685 	if (err)
7686 		goto done;
7687 
7688 	err = got_object_open_as_tree(&tree1, repo,
7689 	    got_object_commit_get_tree_id(parent_commit));
7690 	if (err)
7691 		goto done;
7692 
7693 	err = got_object_open_as_tree(&tree2, repo,
7694 	    got_object_commit_get_tree_id(commit));
7695 	if (err)
7696 		goto done;
7697 
7698 	cpp_arg.path_prefix = path_prefix;
7699 	while (cpp_arg.path_prefix[0] == '/')
7700 		cpp_arg.path_prefix++;
7701 	cpp_arg.len = strlen(cpp_arg.path_prefix);
7702 	cpp_arg.errcode = errcode;
7703 	err = got_diff_tree(tree1, tree2, "", "", repo,
7704 	    check_path_prefix_in_diff, &cpp_arg, 0);
7705 done:
7706 	if (tree1)
7707 		got_object_tree_close(tree1);
7708 	if (tree2)
7709 		got_object_tree_close(tree2);
7710 	if (commit)
7711 		got_object_commit_close(commit);
7712 	if (parent_commit)
7713 		got_object_commit_close(parent_commit);
7714 	return err;
7715 }
7716 
7717 static const struct got_error *
7718 collect_commits(struct got_object_id_queue *commits,
7719     struct got_object_id *initial_commit_id,
7720     struct got_object_id *iter_start_id, struct got_object_id *iter_stop_id,
7721     const char *path_prefix, int path_prefix_errcode,
7722     struct got_repository *repo)
7723 {
7724 	const struct got_error *err = NULL;
7725 	struct got_commit_graph *graph = NULL;
7726 	struct got_object_id *parent_id = NULL;
7727 	struct got_object_qid *qid;
7728         struct got_object_id *commit_id = initial_commit_id;
7729 
7730 	err = got_commit_graph_open(&graph, "/", 1);
7731 	if (err)
7732 		return err;
7733 
7734 	err = got_commit_graph_iter_start(graph, iter_start_id, repo,
7735 	    check_cancelled, NULL);
7736 	if (err)
7737 		goto done;
7738 	while (got_object_id_cmp(commit_id, iter_stop_id) != 0) {
7739 		err = got_commit_graph_iter_next(&parent_id, graph, repo,
7740 		    check_cancelled, NULL);
7741 		if (err) {
7742 			if (err->code == GOT_ERR_ITER_COMPLETED) {
7743 				err = got_error_msg(GOT_ERR_ANCESTRY,
7744 				    "ran out of commits to rebase before "
7745 				    "youngest common ancestor commit has "
7746 				    "been reached?!?");
7747 			}
7748 			goto done;
7749 		} else {
7750 			err = check_path_prefix(parent_id, commit_id,
7751 			    path_prefix, path_prefix_errcode, repo);
7752 			if (err)
7753 				goto done;
7754 
7755 			err = got_object_qid_alloc(&qid, commit_id);
7756 			if (err)
7757 				goto done;
7758 			SIMPLEQ_INSERT_HEAD(commits, qid, entry);
7759 			commit_id = parent_id;
7760 		}
7761 	}
7762 done:
7763 	got_commit_graph_close(graph);
7764 	return err;
7765 }
7766 
7767 static const struct got_error *
7768 get_commit_brief_str(char **brief_str, struct got_commit_object *commit)
7769 {
7770 	const struct got_error *err = NULL;
7771 	time_t committer_time;
7772 	struct tm tm;
7773 	char datebuf[11]; /* YYYY-MM-DD + NUL */
7774 	char *author0 = NULL, *author, *smallerthan;
7775 	char *logmsg0 = NULL, *logmsg, *newline;
7776 
7777 	committer_time = got_object_commit_get_committer_time(commit);
7778 	if (localtime_r(&committer_time, &tm) == NULL)
7779 		return got_error_from_errno("localtime_r");
7780 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d", &tm) == 0)
7781 		return got_error(GOT_ERR_NO_SPACE);
7782 
7783 	author0 = strdup(got_object_commit_get_author(commit));
7784 	if (author0 == NULL)
7785 		return got_error_from_errno("strdup");
7786 	author = author0;
7787 	smallerthan = strchr(author, '<');
7788 	if (smallerthan && smallerthan[1] != '\0')
7789 		author = smallerthan + 1;
7790 	author[strcspn(author, "@>")] = '\0';
7791 
7792 	err = got_object_commit_get_logmsg(&logmsg0, commit);
7793 	if (err)
7794 		goto done;
7795 	logmsg = logmsg0;
7796 	while (*logmsg == '\n')
7797 		logmsg++;
7798 	newline = strchr(logmsg, '\n');
7799 	if (newline)
7800 		*newline = '\0';
7801 
7802 	if (asprintf(brief_str, "%s %s  %s",
7803 	    datebuf, author, logmsg) == -1)
7804 		err = got_error_from_errno("asprintf");
7805 done:
7806 	free(author0);
7807 	free(logmsg0);
7808 	return err;
7809 }
7810 
7811 static const struct got_error *
7812 print_backup_ref(const char *branch_name, const char *new_id_str,
7813     struct got_object_id *old_commit_id, struct got_commit_object *old_commit,
7814     struct got_reflist_object_id_map *refs_idmap,
7815     struct got_repository *repo)
7816 {
7817 	const struct got_error *err = NULL;
7818 	struct got_reflist_head *refs;
7819 	char *refs_str = NULL;
7820 	struct got_object_id *new_commit_id = NULL;
7821 	struct got_commit_object *new_commit = NULL;
7822 	char *new_commit_brief_str = NULL;
7823 	struct got_object_id *yca_id = NULL;
7824 	struct got_commit_object *yca_commit = NULL;
7825 	char *yca_id_str = NULL, *yca_brief_str = NULL;
7826 	char *custom_refs_str;
7827 
7828 	if (asprintf(&custom_refs_str, "formerly %s", branch_name) == -1)
7829 		return got_error_from_errno("asprintf");
7830 
7831 	err = print_commit(old_commit, old_commit_id, repo, NULL, NULL,
7832 	    0, 0, refs_idmap, custom_refs_str);
7833 	if (err)
7834 		goto done;
7835 
7836 	err = got_object_resolve_id_str(&new_commit_id, repo, new_id_str);
7837 	if (err)
7838 		goto done;
7839 
7840 	refs = got_reflist_object_id_map_lookup(refs_idmap, new_commit_id);
7841 	if (refs) {
7842 		err = build_refs_str(&refs_str, refs, new_commit_id, repo);
7843 		if (err)
7844 			goto done;
7845 	}
7846 
7847 	err = got_object_open_as_commit(&new_commit, repo, new_commit_id);
7848 	if (err)
7849 		goto done;
7850 
7851 	err = get_commit_brief_str(&new_commit_brief_str, new_commit);
7852 	if (err)
7853 		goto done;
7854 
7855 	err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
7856 	    old_commit_id, new_commit_id, repo, check_cancelled, NULL);
7857 	if (err)
7858 		goto done;
7859 
7860 	printf("has become commit %s%s%s%s\n %s\n", new_id_str,
7861 	    refs_str ? " (" : "", refs_str ? refs_str : "",
7862 	    refs_str ? ")" : "", new_commit_brief_str);
7863 	if (yca_id && got_object_id_cmp(yca_id, new_commit_id) != 0 &&
7864 	    got_object_id_cmp(yca_id, old_commit_id) != 0) {
7865 		free(refs_str);
7866 		refs_str = NULL;
7867 
7868 		err = got_object_open_as_commit(&yca_commit, repo, yca_id);
7869 		if (err)
7870 			goto done;
7871 
7872 		err = get_commit_brief_str(&yca_brief_str, yca_commit);
7873 		if (err)
7874 			goto done;
7875 
7876 		err = got_object_id_str(&yca_id_str, yca_id);
7877 		if (err)
7878 			goto done;
7879 
7880 		refs = got_reflist_object_id_map_lookup(refs_idmap, yca_id);
7881 		if (refs) {
7882 			err = build_refs_str(&refs_str, refs, yca_id, repo);
7883 			if (err)
7884 				goto done;
7885 		}
7886 		printf("history forked at %s%s%s%s\n %s\n",
7887 		    yca_id_str,
7888 		    refs_str ? " (" : "", refs_str ? refs_str : "",
7889 		    refs_str ? ")" : "", yca_brief_str);
7890 	}
7891 done:
7892 	free(custom_refs_str);
7893 	free(new_commit_id);
7894 	free(refs_str);
7895 	free(yca_id);
7896 	free(yca_id_str);
7897 	free(yca_brief_str);
7898 	if (new_commit)
7899 		got_object_commit_close(new_commit);
7900 	if (yca_commit)
7901 		got_object_commit_close(yca_commit);
7902 
7903 	return NULL;
7904 }
7905 
7906 static const struct got_error *
7907 list_backup_refs(const char *backup_ref_prefix, const char *wanted_branch_name,
7908     struct got_repository *repo)
7909 {
7910 	const struct got_error *err;
7911 	struct got_reflist_head refs, backup_refs;
7912 	struct got_reflist_entry *re;
7913 	const size_t backup_ref_prefix_len = strlen(backup_ref_prefix);
7914 	struct got_object_id *old_commit_id = NULL;
7915 	char *branch_name = NULL;
7916 	struct got_commit_object *old_commit = NULL;
7917 	struct got_reflist_object_id_map *refs_idmap = NULL;
7918 	int wanted_branch_found = 0;
7919 
7920 	TAILQ_INIT(&refs);
7921 	TAILQ_INIT(&backup_refs);
7922 
7923 	err = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
7924 	if (err)
7925 		return err;
7926 
7927 	err = got_reflist_object_id_map_create(&refs_idmap, &refs, repo);
7928 	if (err)
7929 		goto done;
7930 
7931 	if (wanted_branch_name) {
7932 		if (strncmp(wanted_branch_name, "refs/heads/", 11) == 0)
7933 			wanted_branch_name += 11;
7934 	}
7935 
7936 	err = got_ref_list(&backup_refs, repo, backup_ref_prefix,
7937 	    got_ref_cmp_by_commit_timestamp_descending, repo);
7938 	if (err)
7939 		goto done;
7940 
7941 	TAILQ_FOREACH(re, &backup_refs, entry) {
7942 		const char *refname = got_ref_get_name(re->ref);
7943 		char *slash;
7944 
7945 		err = got_ref_resolve(&old_commit_id, repo, re->ref);
7946 		if (err)
7947 			break;
7948 
7949 		err = got_object_open_as_commit(&old_commit, repo,
7950 		    old_commit_id);
7951 		if (err)
7952 			break;
7953 
7954 		if (strncmp(backup_ref_prefix, refname,
7955 		    backup_ref_prefix_len) == 0)
7956 			refname += backup_ref_prefix_len;
7957 
7958 		while (refname[0] == '/')
7959 			refname++;
7960 
7961 		branch_name = strdup(refname);
7962 		if (branch_name == NULL) {
7963 			err = got_error_from_errno("strdup");
7964 			break;
7965 		}
7966 		slash = strrchr(branch_name, '/');
7967 		if (slash) {
7968 			*slash = '\0';
7969 			refname += strlen(branch_name) + 1;
7970 		}
7971 
7972 		if (wanted_branch_name == NULL ||
7973 		    strcmp(wanted_branch_name, branch_name) == 0) {
7974 			wanted_branch_found = 1;
7975 			err = print_backup_ref(branch_name, refname,
7976 			   old_commit_id, old_commit, refs_idmap, repo);
7977 			if (err)
7978 				break;
7979 		}
7980 
7981 		free(old_commit_id);
7982 		old_commit_id = NULL;
7983 		free(branch_name);
7984 		branch_name = NULL;
7985 		got_object_commit_close(old_commit);
7986 		old_commit = NULL;
7987 	}
7988 
7989 	if (wanted_branch_name && !wanted_branch_found) {
7990 		err = got_error_fmt(GOT_ERR_NOT_REF,
7991 		    "%s/%s/", backup_ref_prefix, wanted_branch_name);
7992 	}
7993 done:
7994 	if (refs_idmap)
7995 		got_reflist_object_id_map_free(refs_idmap);
7996 	got_ref_list_free(&refs);
7997 	got_ref_list_free(&backup_refs);
7998 	free(old_commit_id);
7999 	free(branch_name);
8000 	if (old_commit)
8001 		got_object_commit_close(old_commit);
8002 	return err;
8003 }
8004 
8005 static const struct got_error *
8006 cmd_rebase(int argc, char *argv[])
8007 {
8008 	const struct got_error *error = NULL;
8009 	struct got_worktree *worktree = NULL;
8010 	struct got_repository *repo = NULL;
8011 	struct got_fileindex *fileindex = NULL;
8012 	char *cwd = NULL;
8013 	struct got_reference *branch = NULL;
8014 	struct got_reference *new_base_branch = NULL, *tmp_branch = NULL;
8015 	struct got_object_id *commit_id = NULL, *parent_id = NULL;
8016 	struct got_object_id *resume_commit_id = NULL;
8017 	struct got_object_id *branch_head_commit_id = NULL, *yca_id = NULL;
8018 	struct got_commit_object *commit = NULL;
8019 	int ch, rebase_in_progress = 0, abort_rebase = 0, continue_rebase = 0;
8020 	int histedit_in_progress = 0, create_backup = 1, list_backups = 0;
8021 	unsigned char rebase_status = GOT_STATUS_NO_CHANGE;
8022 	struct got_object_id_queue commits;
8023 	struct got_pathlist_head merged_paths;
8024 	const struct got_object_id_queue *parent_ids;
8025 	struct got_object_qid *qid, *pid;
8026 
8027 	SIMPLEQ_INIT(&commits);
8028 	TAILQ_INIT(&merged_paths);
8029 
8030 	while ((ch = getopt(argc, argv, "acl")) != -1) {
8031 		switch (ch) {
8032 		case 'a':
8033 			abort_rebase = 1;
8034 			break;
8035 		case 'c':
8036 			continue_rebase = 1;
8037 			break;
8038 		case 'l':
8039 			list_backups = 1;
8040 			break;
8041 		default:
8042 			usage_rebase();
8043 			/* NOTREACHED */
8044 		}
8045 	}
8046 
8047 	argc -= optind;
8048 	argv += optind;
8049 
8050 #ifndef PROFILE
8051 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
8052 	    "unveil", NULL) == -1)
8053 		err(1, "pledge");
8054 #endif
8055 	if (list_backups) {
8056 		if (abort_rebase)
8057 			option_conflict('l', 'a');
8058 		if (continue_rebase)
8059 			option_conflict('l', 'c');
8060 		if (argc != 0 && argc != 1)
8061 			usage_rebase();
8062 	} else {
8063 		if (abort_rebase && continue_rebase)
8064 			usage_rebase();
8065 		else if (abort_rebase || continue_rebase) {
8066 			if (argc != 0)
8067 				usage_rebase();
8068 		} else if (argc != 1)
8069 			usage_rebase();
8070 	}
8071 
8072 	cwd = getcwd(NULL, 0);
8073 	if (cwd == NULL) {
8074 		error = got_error_from_errno("getcwd");
8075 		goto done;
8076 	}
8077 	error = got_worktree_open(&worktree, cwd);
8078 	if (error) {
8079 		if (list_backups) {
8080 			if (error->code != GOT_ERR_NOT_WORKTREE)
8081 				goto done;
8082 		} else {
8083 			if (error->code == GOT_ERR_NOT_WORKTREE)
8084 				error = wrap_not_worktree_error(error,
8085 				    "rebase", cwd);
8086 			goto done;
8087 		}
8088 	}
8089 
8090 	error = got_repo_open(&repo,
8091 	    worktree ? got_worktree_get_repo_path(worktree) : cwd, NULL);
8092 	if (error != NULL)
8093 		goto done;
8094 
8095 	error = apply_unveil(got_repo_get_path(repo), 0,
8096 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
8097 	if (error)
8098 		goto done;
8099 
8100 	if (list_backups) {
8101 		error = list_backup_refs(GOT_WORKTREE_REBASE_BACKUP_REF_PREFIX,
8102 		    argc == 1 ? argv[0] : NULL, repo);
8103 		goto done; /* nothing else to do */
8104 	}
8105 
8106 	error = got_worktree_histedit_in_progress(&histedit_in_progress,
8107 	    worktree);
8108 	if (error)
8109 		goto done;
8110 	if (histedit_in_progress) {
8111 		error = got_error(GOT_ERR_HISTEDIT_BUSY);
8112 		goto done;
8113 	}
8114 
8115 	error = got_worktree_rebase_in_progress(&rebase_in_progress, worktree);
8116 	if (error)
8117 		goto done;
8118 
8119 	if (abort_rebase) {
8120 		struct got_update_progress_arg upa;
8121 		if (!rebase_in_progress) {
8122 			error = got_error(GOT_ERR_NOT_REBASING);
8123 			goto done;
8124 		}
8125 		error = got_worktree_rebase_continue(&resume_commit_id,
8126 		    &new_base_branch, &tmp_branch, &branch, &fileindex,
8127 		    worktree, repo);
8128 		if (error)
8129 			goto done;
8130 		printf("Switching work tree to %s\n",
8131 		    got_ref_get_symref_target(new_base_branch));
8132 		memset(&upa, 0, sizeof(upa));
8133 		error = got_worktree_rebase_abort(worktree, fileindex, repo,
8134 		    new_base_branch, update_progress, &upa);
8135 		if (error)
8136 			goto done;
8137 		printf("Rebase of %s aborted\n", got_ref_get_name(branch));
8138 		print_update_progress_stats(&upa);
8139 		goto done; /* nothing else to do */
8140 	}
8141 
8142 	if (continue_rebase) {
8143 		if (!rebase_in_progress) {
8144 			error = got_error(GOT_ERR_NOT_REBASING);
8145 			goto done;
8146 		}
8147 		error = got_worktree_rebase_continue(&resume_commit_id,
8148 		    &new_base_branch, &tmp_branch, &branch, &fileindex,
8149 		    worktree, repo);
8150 		if (error)
8151 			goto done;
8152 
8153 		error = rebase_commit(NULL, worktree, fileindex, tmp_branch,
8154 		    resume_commit_id, repo);
8155 		if (error)
8156 			goto done;
8157 
8158 		yca_id = got_object_id_dup(resume_commit_id);
8159 		if (yca_id == NULL) {
8160 			error = got_error_from_errno("got_object_id_dup");
8161 			goto done;
8162 		}
8163 	} else {
8164 		error = got_ref_open(&branch, repo, argv[0], 0);
8165 		if (error != NULL)
8166 			goto done;
8167 	}
8168 
8169 	error = got_ref_resolve(&branch_head_commit_id, repo, branch);
8170 	if (error)
8171 		goto done;
8172 
8173 	if (!continue_rebase) {
8174 		struct got_object_id *base_commit_id;
8175 
8176 		base_commit_id = got_worktree_get_base_commit_id(worktree);
8177 		error = got_commit_graph_find_youngest_common_ancestor(&yca_id,
8178 		    base_commit_id, branch_head_commit_id, repo,
8179 		    check_cancelled, NULL);
8180 		if (error)
8181 			goto done;
8182 		if (yca_id == NULL) {
8183 			error = got_error_msg(GOT_ERR_ANCESTRY,
8184 			    "specified branch shares no common ancestry "
8185 			    "with work tree's branch");
8186 			goto done;
8187 		}
8188 
8189 		error = check_same_branch(base_commit_id, branch, yca_id, repo);
8190 		if (error) {
8191 			if (error->code != GOT_ERR_ANCESTRY)
8192 				goto done;
8193 			error = NULL;
8194 		} else {
8195 			static char msg[128];
8196 			snprintf(msg, sizeof(msg),
8197 			    "%s is already based on %s",
8198 			    got_ref_get_name(branch),
8199 			    got_worktree_get_head_ref_name(worktree));
8200 			error = got_error_msg(GOT_ERR_SAME_BRANCH, msg);
8201 			goto done;
8202 		}
8203 		error = got_worktree_rebase_prepare(&new_base_branch,
8204 		    &tmp_branch, &fileindex, worktree, branch, repo);
8205 		if (error)
8206 			goto done;
8207 	}
8208 
8209 	commit_id = branch_head_commit_id;
8210 	error = got_object_open_as_commit(&commit, repo, commit_id);
8211 	if (error)
8212 		goto done;
8213 
8214 	parent_ids = got_object_commit_get_parent_ids(commit);
8215 	pid = SIMPLEQ_FIRST(parent_ids);
8216 	if (pid == NULL) {
8217 		if (!continue_rebase) {
8218 			struct got_update_progress_arg upa;
8219 			memset(&upa, 0, sizeof(upa));
8220 			error = got_worktree_rebase_abort(worktree, fileindex,
8221 			    repo, new_base_branch, update_progress, &upa);
8222 			if (error)
8223 				goto done;
8224 			printf("Rebase of %s aborted\n",
8225 			    got_ref_get_name(branch));
8226 			print_update_progress_stats(&upa);
8227 
8228 		}
8229 		error = got_error(GOT_ERR_EMPTY_REBASE);
8230 		goto done;
8231 	}
8232 	error = collect_commits(&commits, commit_id, pid->id,
8233 	    yca_id, got_worktree_get_path_prefix(worktree),
8234 	    GOT_ERR_REBASE_PATH, repo);
8235 	got_object_commit_close(commit);
8236 	commit = NULL;
8237 	if (error)
8238 		goto done;
8239 
8240 	if (SIMPLEQ_EMPTY(&commits)) {
8241 		if (continue_rebase) {
8242 			error = rebase_complete(worktree, fileindex,
8243 			    branch, new_base_branch, tmp_branch, repo,
8244 			    create_backup);
8245 			goto done;
8246 		} else {
8247 			/* Fast-forward the reference of the branch. */
8248 			struct got_object_id *new_head_commit_id;
8249 			char *id_str;
8250 			error = got_ref_resolve(&new_head_commit_id, repo,
8251 			    new_base_branch);
8252 			if (error)
8253 				goto done;
8254 			error = got_object_id_str(&id_str, new_head_commit_id);
8255 			printf("Forwarding %s to commit %s\n",
8256 			    got_ref_get_name(branch), id_str);
8257 			free(id_str);
8258 			error = got_ref_change_ref(branch,
8259 			    new_head_commit_id);
8260 			if (error)
8261 				goto done;
8262 			/* No backup needed since objects did not change. */
8263 			create_backup = 0;
8264 		}
8265 	}
8266 
8267 	pid = NULL;
8268 	SIMPLEQ_FOREACH(qid, &commits, entry) {
8269 		struct got_update_progress_arg upa;
8270 
8271 		commit_id = qid->id;
8272 		parent_id = pid ? pid->id : yca_id;
8273 		pid = qid;
8274 
8275 		memset(&upa, 0, sizeof(upa));
8276 		error = got_worktree_rebase_merge_files(&merged_paths,
8277 		    worktree, fileindex, parent_id, commit_id, repo,
8278 		    update_progress, &upa, check_cancelled, NULL);
8279 		if (error)
8280 			goto done;
8281 
8282 		print_update_progress_stats(&upa);
8283 		if (upa.conflicts > 0)
8284 			rebase_status = GOT_STATUS_CONFLICT;
8285 
8286 		if (rebase_status == GOT_STATUS_CONFLICT) {
8287 			error = show_rebase_merge_conflict(qid->id, repo);
8288 			if (error)
8289 				goto done;
8290 			got_worktree_rebase_pathlist_free(&merged_paths);
8291 			break;
8292 		}
8293 
8294 		error = rebase_commit(&merged_paths, worktree, fileindex,
8295 		    tmp_branch, commit_id, repo);
8296 		got_worktree_rebase_pathlist_free(&merged_paths);
8297 		if (error)
8298 			goto done;
8299 	}
8300 
8301 	if (rebase_status == GOT_STATUS_CONFLICT) {
8302 		error = got_worktree_rebase_postpone(worktree, fileindex);
8303 		if (error)
8304 			goto done;
8305 		error = got_error_msg(GOT_ERR_CONFLICTS,
8306 		    "conflicts must be resolved before rebasing can continue");
8307 	} else
8308 		error = rebase_complete(worktree, fileindex, branch,
8309 		    new_base_branch, tmp_branch, repo, create_backup);
8310 done:
8311 	got_object_id_queue_free(&commits);
8312 	free(branch_head_commit_id);
8313 	free(resume_commit_id);
8314 	free(yca_id);
8315 	if (commit)
8316 		got_object_commit_close(commit);
8317 	if (branch)
8318 		got_ref_close(branch);
8319 	if (new_base_branch)
8320 		got_ref_close(new_base_branch);
8321 	if (tmp_branch)
8322 		got_ref_close(tmp_branch);
8323 	if (worktree)
8324 		got_worktree_close(worktree);
8325 	if (repo)
8326 		got_repo_close(repo);
8327 	return error;
8328 }
8329 
8330 __dead static void
8331 usage_histedit(void)
8332 {
8333 	fprintf(stderr, "usage: %s histedit [-a] [-c] [-f] "
8334 	    "[-F histedit-script] [-m] [-l] [branch]\n", getprogname());
8335 	exit(1);
8336 }
8337 
8338 #define GOT_HISTEDIT_PICK 'p'
8339 #define GOT_HISTEDIT_EDIT 'e'
8340 #define GOT_HISTEDIT_FOLD 'f'
8341 #define GOT_HISTEDIT_DROP 'd'
8342 #define GOT_HISTEDIT_MESG 'm'
8343 
8344 static struct got_histedit_cmd {
8345 	unsigned char code;
8346 	const char *name;
8347 	const char *desc;
8348 } got_histedit_cmds[] = {
8349 	{ GOT_HISTEDIT_PICK, "pick", "use commit" },
8350 	{ GOT_HISTEDIT_EDIT, "edit", "use commit but stop for amending" },
8351 	{ GOT_HISTEDIT_FOLD, "fold", "combine with next commit that will "
8352 	    "be used" },
8353 	{ GOT_HISTEDIT_DROP, "drop", "remove commit from history" },
8354 	{ GOT_HISTEDIT_MESG, "mesg",
8355 	    "single-line log message for commit above (open editor if empty)" },
8356 };
8357 
8358 struct got_histedit_list_entry {
8359 	TAILQ_ENTRY(got_histedit_list_entry) entry;
8360 	struct got_object_id *commit_id;
8361 	const struct got_histedit_cmd *cmd;
8362 	char *logmsg;
8363 };
8364 TAILQ_HEAD(got_histedit_list, got_histedit_list_entry);
8365 
8366 static const struct got_error *
8367 histedit_write_commit(struct got_object_id *commit_id, const char *cmdname,
8368     FILE *f, struct got_repository *repo)
8369 {
8370 	const struct got_error *err = NULL;
8371 	char *logmsg = NULL, *id_str = NULL;
8372 	struct got_commit_object *commit = NULL;
8373 	int n;
8374 
8375 	err = got_object_open_as_commit(&commit, repo, commit_id);
8376 	if (err)
8377 		goto done;
8378 
8379 	err = get_short_logmsg(&logmsg, 34, commit);
8380 	if (err)
8381 		goto done;
8382 
8383 	err = got_object_id_str(&id_str, commit_id);
8384 	if (err)
8385 		goto done;
8386 
8387 	n = fprintf(f, "%s %s %s\n", cmdname, id_str, logmsg);
8388 	if (n < 0)
8389 		err = got_ferror(f, GOT_ERR_IO);
8390 done:
8391 	if (commit)
8392 		got_object_commit_close(commit);
8393 	free(id_str);
8394 	free(logmsg);
8395 	return err;
8396 }
8397 
8398 static const struct got_error *
8399 histedit_write_commit_list(struct got_object_id_queue *commits,
8400     FILE *f, int edit_logmsg_only, int fold_only, struct got_repository *repo)
8401 {
8402 	const struct got_error *err = NULL;
8403 	struct got_object_qid *qid;
8404 	const char *histedit_cmd = NULL;
8405 
8406 	if (SIMPLEQ_EMPTY(commits))
8407 		return got_error(GOT_ERR_EMPTY_HISTEDIT);
8408 
8409 	SIMPLEQ_FOREACH(qid, commits, entry) {
8410 		histedit_cmd = got_histedit_cmds[0].name;
8411 		if (fold_only && SIMPLEQ_NEXT(qid, entry) != NULL)
8412 			histedit_cmd = "fold";
8413 		err = histedit_write_commit(qid->id, histedit_cmd, f, repo);
8414 		if (err)
8415 			break;
8416 		if (edit_logmsg_only) {
8417 			int n = fprintf(f, "%c\n", GOT_HISTEDIT_MESG);
8418 			if (n < 0) {
8419 				err = got_ferror(f, GOT_ERR_IO);
8420 				break;
8421 			}
8422 		}
8423 	}
8424 
8425 	return err;
8426 }
8427 
8428 static const struct got_error *
8429 write_cmd_list(FILE *f, const char *branch_name,
8430     struct got_object_id_queue *commits)
8431 {
8432 	const struct got_error *err = NULL;
8433 	size_t i;
8434 	int n;
8435 	char *id_str;
8436 	struct got_object_qid *qid;
8437 
8438 	qid = SIMPLEQ_FIRST(commits);
8439 	err = got_object_id_str(&id_str, qid->id);
8440 	if (err)
8441 		return err;
8442 
8443 	n = fprintf(f,
8444 	    "# Editing the history of branch '%s' starting at\n"
8445 	    "# commit %s\n"
8446 	    "# Commits will be processed in order from top to "
8447 	    "bottom of this file.\n", branch_name, id_str);
8448 	if (n < 0) {
8449 		err = got_ferror(f, GOT_ERR_IO);
8450 		goto done;
8451 	}
8452 
8453 	n = fprintf(f, "# Available histedit commands:\n");
8454 	if (n < 0) {
8455 		err = got_ferror(f, GOT_ERR_IO);
8456 		goto done;
8457 	}
8458 
8459 	for (i = 0; i < nitems(got_histedit_cmds); i++) {
8460 		struct got_histedit_cmd *cmd = &got_histedit_cmds[i];
8461 		n = fprintf(f, "#   %s (%c): %s\n", cmd->name, cmd->code,
8462 		    cmd->desc);
8463 		if (n < 0) {
8464 			err = got_ferror(f, GOT_ERR_IO);
8465 			break;
8466 		}
8467 	}
8468 done:
8469 	free(id_str);
8470 	return err;
8471 }
8472 
8473 static const struct got_error *
8474 histedit_syntax_error(int lineno)
8475 {
8476 	static char msg[42];
8477 	int ret;
8478 
8479 	ret = snprintf(msg, sizeof(msg), "histedit syntax error on line %d",
8480 	    lineno);
8481 	if (ret == -1 || ret >= sizeof(msg))
8482 		return got_error(GOT_ERR_HISTEDIT_SYNTAX);
8483 
8484 	return got_error_msg(GOT_ERR_HISTEDIT_SYNTAX, msg);
8485 }
8486 
8487 static const struct got_error *
8488 append_folded_commit_msg(char **new_msg, struct got_histedit_list_entry *hle,
8489     char *logmsg, struct got_repository *repo)
8490 {
8491 	const struct got_error *err;
8492 	struct got_commit_object *folded_commit = NULL;
8493 	char *id_str, *folded_logmsg = NULL;
8494 
8495 	err = got_object_id_str(&id_str, hle->commit_id);
8496 	if (err)
8497 		return err;
8498 
8499 	err = got_object_open_as_commit(&folded_commit, repo, hle->commit_id);
8500 	if (err)
8501 		goto done;
8502 
8503 	err = got_object_commit_get_logmsg(&folded_logmsg, folded_commit);
8504 	if (err)
8505 		goto done;
8506 	if (asprintf(new_msg, "%s%s# log message of folded commit %s: %s",
8507 	    logmsg ? logmsg : "", logmsg ? "\n" : "", id_str,
8508 	    folded_logmsg) == -1) {
8509 		err = got_error_from_errno("asprintf");
8510 	}
8511 done:
8512 	if (folded_commit)
8513 		got_object_commit_close(folded_commit);
8514 	free(id_str);
8515 	free(folded_logmsg);
8516 	return err;
8517 }
8518 
8519 static struct got_histedit_list_entry *
8520 get_folded_commits(struct got_histedit_list_entry *hle)
8521 {
8522 	struct got_histedit_list_entry *prev, *folded = NULL;
8523 
8524 	prev = TAILQ_PREV(hle, got_histedit_list, entry);
8525 	while (prev && (prev->cmd->code == GOT_HISTEDIT_FOLD ||
8526 	    prev->cmd->code == GOT_HISTEDIT_DROP)) {
8527 		if (prev->cmd->code == GOT_HISTEDIT_FOLD)
8528 			folded = prev;
8529 		prev = TAILQ_PREV(prev, got_histedit_list, entry);
8530 	}
8531 
8532 	return folded;
8533 }
8534 
8535 static const struct got_error *
8536 histedit_edit_logmsg(struct got_histedit_list_entry *hle,
8537     struct got_repository *repo)
8538 {
8539 	char *logmsg_path = NULL, *id_str = NULL, *orig_logmsg = NULL;
8540 	char *logmsg = NULL, *new_msg = NULL, *editor = NULL;
8541 	const struct got_error *err = NULL;
8542 	struct got_commit_object *commit = NULL;
8543 	int logmsg_len;
8544 	int fd;
8545 	struct got_histedit_list_entry *folded = NULL;
8546 
8547 	err = got_object_open_as_commit(&commit, repo, hle->commit_id);
8548 	if (err)
8549 		return err;
8550 
8551 	folded = get_folded_commits(hle);
8552 	if (folded) {
8553 		while (folded != hle) {
8554 			if (folded->cmd->code == GOT_HISTEDIT_DROP) {
8555 				folded = TAILQ_NEXT(folded, entry);
8556 				continue;
8557 			}
8558 			err = append_folded_commit_msg(&new_msg, folded,
8559 			    logmsg, repo);
8560 			if (err)
8561 				goto done;
8562 			free(logmsg);
8563 			logmsg = new_msg;
8564 			folded = TAILQ_NEXT(folded, entry);
8565 		}
8566 	}
8567 
8568 	err = got_object_id_str(&id_str, hle->commit_id);
8569 	if (err)
8570 		goto done;
8571 	err = got_object_commit_get_logmsg(&orig_logmsg, commit);
8572 	if (err)
8573 		goto done;
8574 	logmsg_len = asprintf(&new_msg,
8575 	    "%s\n# original log message of commit %s: %s",
8576 	    logmsg ? logmsg : "", id_str, orig_logmsg);
8577 	if (logmsg_len == -1) {
8578 		err = got_error_from_errno("asprintf");
8579 		goto done;
8580 	}
8581 	free(logmsg);
8582 	logmsg = new_msg;
8583 
8584 	err = got_object_id_str(&id_str, hle->commit_id);
8585 	if (err)
8586 		goto done;
8587 
8588 	err = got_opentemp_named_fd(&logmsg_path, &fd,
8589 	    GOT_TMPDIR_STR "/got-logmsg");
8590 	if (err)
8591 		goto done;
8592 
8593 	write(fd, logmsg, logmsg_len);
8594 	close(fd);
8595 
8596 	err = get_editor(&editor);
8597 	if (err)
8598 		goto done;
8599 
8600 	err = edit_logmsg(&hle->logmsg, editor, logmsg_path, logmsg,
8601 	    logmsg_len, 0);
8602 	if (err) {
8603 		if (err->code != GOT_ERR_COMMIT_MSG_EMPTY)
8604 			goto done;
8605 		err = NULL;
8606 		hle->logmsg = strdup(new_msg);
8607 		if (hle->logmsg == NULL)
8608 			err = got_error_from_errno("strdup");
8609 	}
8610 done:
8611 	if (logmsg_path && unlink(logmsg_path) != 0 && err == NULL)
8612 		err = got_error_from_errno2("unlink", logmsg_path);
8613 	free(logmsg_path);
8614 	free(logmsg);
8615 	free(orig_logmsg);
8616 	free(editor);
8617 	if (commit)
8618 		got_object_commit_close(commit);
8619 	return err;
8620 }
8621 
8622 static const struct got_error *
8623 histedit_parse_list(struct got_histedit_list *histedit_cmds,
8624     FILE *f, struct got_repository *repo)
8625 {
8626 	const struct got_error *err = NULL;
8627 	char *line = NULL, *p, *end;
8628 	size_t i, size;
8629 	ssize_t len;
8630 	int lineno = 0;
8631 	const struct got_histedit_cmd *cmd;
8632 	struct got_object_id *commit_id = NULL;
8633 	struct got_histedit_list_entry *hle = NULL;
8634 
8635 	for (;;) {
8636 		len = getline(&line, &size, f);
8637 		if (len == -1) {
8638 			const struct got_error *getline_err;
8639 			if (feof(f))
8640 				break;
8641 			getline_err = got_error_from_errno("getline");
8642 			err = got_ferror(f, getline_err->code);
8643 			break;
8644 		}
8645 		lineno++;
8646 		p = line;
8647 		while (isspace((unsigned char)p[0]))
8648 			p++;
8649 		if (p[0] == '#' || p[0] == '\0') {
8650 			free(line);
8651 			line = NULL;
8652 			continue;
8653 		}
8654 		cmd = NULL;
8655 		for (i = 0; i < nitems(got_histedit_cmds); i++) {
8656 			cmd = &got_histedit_cmds[i];
8657 			if (strncmp(cmd->name, p, strlen(cmd->name)) == 0 &&
8658 			    isspace((unsigned char)p[strlen(cmd->name)])) {
8659 				p += strlen(cmd->name);
8660 				break;
8661 			}
8662 			if (p[0] == cmd->code && isspace((unsigned char)p[1])) {
8663 				p++;
8664 				break;
8665 			}
8666 		}
8667 		if (i == nitems(got_histedit_cmds)) {
8668 			err = histedit_syntax_error(lineno);
8669 			break;
8670 		}
8671 		while (isspace((unsigned char)p[0]))
8672 			p++;
8673 		if (cmd->code == GOT_HISTEDIT_MESG) {
8674 			if (hle == NULL || hle->logmsg != NULL) {
8675 				err = got_error(GOT_ERR_HISTEDIT_CMD);
8676 				break;
8677 			}
8678 			if (p[0] == '\0') {
8679 				err = histedit_edit_logmsg(hle, repo);
8680 				if (err)
8681 					break;
8682 			} else {
8683 				hle->logmsg = strdup(p);
8684 				if (hle->logmsg == NULL) {
8685 					err = got_error_from_errno("strdup");
8686 					break;
8687 				}
8688 			}
8689 			free(line);
8690 			line = NULL;
8691 			continue;
8692 		} else {
8693 			end = p;
8694 			while (end[0] && !isspace((unsigned char)end[0]))
8695 				end++;
8696 			*end = '\0';
8697 
8698 			err = got_object_resolve_id_str(&commit_id, repo, p);
8699 			if (err) {
8700 				/* override error code */
8701 				err = histedit_syntax_error(lineno);
8702 				break;
8703 			}
8704 		}
8705 		hle = malloc(sizeof(*hle));
8706 		if (hle == NULL) {
8707 			err = got_error_from_errno("malloc");
8708 			break;
8709 		}
8710 		hle->cmd = cmd;
8711 		hle->commit_id = commit_id;
8712 		hle->logmsg = NULL;
8713 		commit_id = NULL;
8714 		free(line);
8715 		line = NULL;
8716 		TAILQ_INSERT_TAIL(histedit_cmds, hle, entry);
8717 	}
8718 
8719 	free(line);
8720 	free(commit_id);
8721 	return err;
8722 }
8723 
8724 static const struct got_error *
8725 histedit_check_script(struct got_histedit_list *histedit_cmds,
8726     struct got_object_id_queue *commits, struct got_repository *repo)
8727 {
8728 	const struct got_error *err = NULL;
8729 	struct got_object_qid *qid;
8730 	struct got_histedit_list_entry *hle;
8731 	static char msg[92];
8732 	char *id_str;
8733 
8734 	if (TAILQ_EMPTY(histedit_cmds))
8735 		return got_error_msg(GOT_ERR_EMPTY_HISTEDIT,
8736 		    "histedit script contains no commands");
8737 	if (SIMPLEQ_EMPTY(commits))
8738 		return got_error(GOT_ERR_EMPTY_HISTEDIT);
8739 
8740 	TAILQ_FOREACH(hle, histedit_cmds, entry) {
8741 		struct got_histedit_list_entry *hle2;
8742 		TAILQ_FOREACH(hle2, histedit_cmds, entry) {
8743 			if (hle == hle2)
8744 				continue;
8745 			if (got_object_id_cmp(hle->commit_id,
8746 			    hle2->commit_id) != 0)
8747 				continue;
8748 			err = got_object_id_str(&id_str, hle->commit_id);
8749 			if (err)
8750 				return err;
8751 			snprintf(msg, sizeof(msg), "commit %s is listed "
8752 			    "more than once in histedit script", id_str);
8753 			free(id_str);
8754 			return got_error_msg(GOT_ERR_HISTEDIT_CMD, msg);
8755 		}
8756 	}
8757 
8758 	SIMPLEQ_FOREACH(qid, commits, entry) {
8759 		TAILQ_FOREACH(hle, histedit_cmds, entry) {
8760 			if (got_object_id_cmp(qid->id, hle->commit_id) == 0)
8761 				break;
8762 		}
8763 		if (hle == NULL) {
8764 			err = got_object_id_str(&id_str, qid->id);
8765 			if (err)
8766 				return err;
8767 			snprintf(msg, sizeof(msg),
8768 			    "commit %s missing from histedit script", id_str);
8769 			free(id_str);
8770 			return got_error_msg(GOT_ERR_HISTEDIT_CMD, msg);
8771 		}
8772 	}
8773 
8774 	hle = TAILQ_LAST(histedit_cmds, got_histedit_list);
8775 	if (hle && hle->cmd->code == GOT_HISTEDIT_FOLD)
8776 		return got_error_msg(GOT_ERR_HISTEDIT_CMD,
8777 		    "last commit in histedit script cannot be folded");
8778 
8779 	return NULL;
8780 }
8781 
8782 static const struct got_error *
8783 histedit_run_editor(struct got_histedit_list *histedit_cmds,
8784     const char *path, struct got_object_id_queue *commits,
8785     struct got_repository *repo)
8786 {
8787 	const struct got_error *err = NULL;
8788 	char *editor;
8789 	FILE *f = NULL;
8790 
8791 	err = get_editor(&editor);
8792 	if (err)
8793 		return err;
8794 
8795 	if (spawn_editor(editor, path) == -1) {
8796 		err = got_error_from_errno("failed spawning editor");
8797 		goto done;
8798 	}
8799 
8800 	f = fopen(path, "r");
8801 	if (f == NULL) {
8802 		err = got_error_from_errno("fopen");
8803 		goto done;
8804 	}
8805 	err = histedit_parse_list(histedit_cmds, f, repo);
8806 	if (err)
8807 		goto done;
8808 
8809 	err = histedit_check_script(histedit_cmds, commits, repo);
8810 done:
8811 	if (f && fclose(f) == EOF && err == NULL)
8812 		err = got_error_from_errno("fclose");
8813 	free(editor);
8814 	return err;
8815 }
8816 
8817 static const struct got_error *
8818 histedit_edit_list_retry(struct got_histedit_list *, const struct got_error *,
8819     struct got_object_id_queue *, const char *, const char *,
8820     struct got_repository *);
8821 
8822 static const struct got_error *
8823 histedit_edit_script(struct got_histedit_list *histedit_cmds,
8824     struct got_object_id_queue *commits, const char *branch_name,
8825     int edit_logmsg_only, int fold_only, struct got_repository *repo)
8826 {
8827 	const struct got_error *err;
8828 	FILE *f = NULL;
8829 	char *path = NULL;
8830 
8831 	err = got_opentemp_named(&path, &f, "got-histedit");
8832 	if (err)
8833 		return err;
8834 
8835 	err = write_cmd_list(f, branch_name, commits);
8836 	if (err)
8837 		goto done;
8838 
8839 	err = histedit_write_commit_list(commits, f, edit_logmsg_only,
8840 	    fold_only, repo);
8841 	if (err)
8842 		goto done;
8843 
8844 	if (edit_logmsg_only || fold_only) {
8845 		rewind(f);
8846 		err = histedit_parse_list(histedit_cmds, f, repo);
8847 	} else {
8848 		if (fclose(f) == EOF) {
8849 			err = got_error_from_errno("fclose");
8850 			goto done;
8851 		}
8852 		f = NULL;
8853 		err = histedit_run_editor(histedit_cmds, path, commits, repo);
8854 		if (err) {
8855 			if (err->code != GOT_ERR_HISTEDIT_SYNTAX &&
8856 			    err->code != GOT_ERR_HISTEDIT_CMD)
8857 				goto done;
8858 			err = histedit_edit_list_retry(histedit_cmds, err,
8859 			    commits, path, branch_name, repo);
8860 		}
8861 	}
8862 done:
8863 	if (f && fclose(f) == EOF && err == NULL)
8864 		err = got_error_from_errno("fclose");
8865 	if (path && unlink(path) != 0 && err == NULL)
8866 		err = got_error_from_errno2("unlink", path);
8867 	free(path);
8868 	return err;
8869 }
8870 
8871 static const struct got_error *
8872 histedit_save_list(struct got_histedit_list *histedit_cmds,
8873     struct got_worktree *worktree, struct got_repository *repo)
8874 {
8875 	const struct got_error *err = NULL;
8876 	char *path = NULL;
8877 	FILE *f = NULL;
8878 	struct got_histedit_list_entry *hle;
8879 	struct got_commit_object *commit = NULL;
8880 
8881 	err = got_worktree_get_histedit_script_path(&path, worktree);
8882 	if (err)
8883 		return err;
8884 
8885 	f = fopen(path, "w");
8886 	if (f == NULL) {
8887 		err = got_error_from_errno2("fopen", path);
8888 		goto done;
8889 	}
8890 	TAILQ_FOREACH(hle, histedit_cmds, entry) {
8891 		err = histedit_write_commit(hle->commit_id, hle->cmd->name, f,
8892 		    repo);
8893 		if (err)
8894 			break;
8895 
8896 		if (hle->logmsg) {
8897 			int n = fprintf(f, "%c %s\n",
8898 			    GOT_HISTEDIT_MESG, hle->logmsg);
8899 			if (n < 0) {
8900 				err = got_ferror(f, GOT_ERR_IO);
8901 				break;
8902 			}
8903 		}
8904 	}
8905 done:
8906 	if (f && fclose(f) == EOF && err == NULL)
8907 		err = got_error_from_errno("fclose");
8908 	free(path);
8909 	if (commit)
8910 		got_object_commit_close(commit);
8911 	return err;
8912 }
8913 
8914 void
8915 histedit_free_list(struct got_histedit_list *histedit_cmds)
8916 {
8917 	struct got_histedit_list_entry *hle;
8918 
8919 	while ((hle = TAILQ_FIRST(histedit_cmds))) {
8920 		TAILQ_REMOVE(histedit_cmds, hle, entry);
8921 		free(hle);
8922 	}
8923 }
8924 
8925 static const struct got_error *
8926 histedit_load_list(struct got_histedit_list *histedit_cmds,
8927     const char *path, struct got_repository *repo)
8928 {
8929 	const struct got_error *err = NULL;
8930 	FILE *f = NULL;
8931 
8932 	f = fopen(path, "r");
8933 	if (f == NULL) {
8934 		err = got_error_from_errno2("fopen", path);
8935 		goto done;
8936 	}
8937 
8938 	err = histedit_parse_list(histedit_cmds, f, repo);
8939 done:
8940 	if (f && fclose(f) == EOF && err == NULL)
8941 		err = got_error_from_errno("fclose");
8942 	return err;
8943 }
8944 
8945 static const struct got_error *
8946 histedit_edit_list_retry(struct got_histedit_list *histedit_cmds,
8947     const struct got_error *edit_err, struct got_object_id_queue *commits,
8948     const char *path, const char *branch_name, struct got_repository *repo)
8949 {
8950 	const struct got_error *err = NULL, *prev_err = edit_err;
8951 	int resp = ' ';
8952 
8953 	while (resp != 'c' && resp != 'r' && resp != 'a') {
8954 		printf("%s: %s\n(c)ontinue editing, (r)estart editing, "
8955 		    "or (a)bort: ", getprogname(), prev_err->msg);
8956 		resp = getchar();
8957 		if (resp == '\n')
8958 			resp = getchar();
8959 		if (resp == 'c') {
8960 			histedit_free_list(histedit_cmds);
8961 			err = histedit_run_editor(histedit_cmds, path, commits,
8962 			    repo);
8963 			if (err) {
8964 				if (err->code != GOT_ERR_HISTEDIT_SYNTAX &&
8965 				    err->code != GOT_ERR_HISTEDIT_CMD)
8966 					break;
8967 				prev_err = err;
8968 				resp = ' ';
8969 				continue;
8970 			}
8971 			break;
8972 		} else if (resp == 'r') {
8973 			histedit_free_list(histedit_cmds);
8974 			err = histedit_edit_script(histedit_cmds,
8975 			    commits, branch_name, 0, 0, repo);
8976 			if (err) {
8977 				if (err->code != GOT_ERR_HISTEDIT_SYNTAX &&
8978 				    err->code != GOT_ERR_HISTEDIT_CMD)
8979 					break;
8980 				prev_err = err;
8981 				resp = ' ';
8982 				continue;
8983 			}
8984 			break;
8985 		} else if (resp == 'a') {
8986 			err = got_error(GOT_ERR_HISTEDIT_CANCEL);
8987 			break;
8988 		} else
8989 			printf("invalid response '%c'\n", resp);
8990 	}
8991 
8992 	return err;
8993 }
8994 
8995 static const struct got_error *
8996 histedit_complete(struct got_worktree *worktree,
8997     struct got_fileindex *fileindex, struct got_reference *tmp_branch,
8998     struct got_reference *branch, struct got_repository *repo)
8999 {
9000 	printf("Switching work tree to %s\n",
9001 	    got_ref_get_symref_target(branch));
9002 	return got_worktree_histedit_complete(worktree, fileindex, tmp_branch,
9003 	    branch, repo);
9004 }
9005 
9006 static const struct got_error *
9007 show_histedit_progress(struct got_commit_object *commit,
9008     struct got_histedit_list_entry *hle, struct got_object_id *new_id)
9009 {
9010 	const struct got_error *err;
9011 	char *old_id_str = NULL, *new_id_str = NULL, *logmsg = NULL;
9012 
9013 	err = got_object_id_str(&old_id_str, hle->commit_id);
9014 	if (err)
9015 		goto done;
9016 
9017 	if (new_id) {
9018 		err = got_object_id_str(&new_id_str, new_id);
9019 		if (err)
9020 			goto done;
9021 	}
9022 
9023 	old_id_str[12] = '\0';
9024 	if (new_id_str)
9025 		new_id_str[12] = '\0';
9026 
9027 	if (hle->logmsg) {
9028 		logmsg = strdup(hle->logmsg);
9029 		if (logmsg == NULL) {
9030 			err = got_error_from_errno("strdup");
9031 			goto done;
9032 		}
9033 		trim_logmsg(logmsg, 42);
9034 	} else {
9035 		err = get_short_logmsg(&logmsg, 42, commit);
9036 		if (err)
9037 			goto done;
9038 	}
9039 
9040 	switch (hle->cmd->code) {
9041 	case GOT_HISTEDIT_PICK:
9042 	case GOT_HISTEDIT_EDIT:
9043 		printf("%s -> %s: %s\n", old_id_str,
9044 		    new_id_str ? new_id_str : "no-op change", logmsg);
9045 		break;
9046 	case GOT_HISTEDIT_DROP:
9047 	case GOT_HISTEDIT_FOLD:
9048 		printf("%s ->  %s commit: %s\n", old_id_str, hle->cmd->name,
9049 		    logmsg);
9050 		break;
9051 	default:
9052 		break;
9053 	}
9054 done:
9055 	free(old_id_str);
9056 	free(new_id_str);
9057 	return err;
9058 }
9059 
9060 static const struct got_error *
9061 histedit_commit(struct got_pathlist_head *merged_paths,
9062     struct got_worktree *worktree, struct got_fileindex *fileindex,
9063     struct got_reference *tmp_branch, struct got_histedit_list_entry *hle,
9064     struct got_repository *repo)
9065 {
9066 	const struct got_error *err;
9067 	struct got_commit_object *commit;
9068 	struct got_object_id *new_commit_id;
9069 
9070 	if ((hle->cmd->code == GOT_HISTEDIT_EDIT || get_folded_commits(hle))
9071 	    && hle->logmsg == NULL) {
9072 		err = histedit_edit_logmsg(hle, repo);
9073 		if (err)
9074 			return err;
9075 	}
9076 
9077 	err = got_object_open_as_commit(&commit, repo, hle->commit_id);
9078 	if (err)
9079 		return err;
9080 
9081 	err = got_worktree_histedit_commit(&new_commit_id, merged_paths,
9082 	    worktree, fileindex, tmp_branch, commit, hle->commit_id,
9083 	    hle->logmsg, repo);
9084 	if (err) {
9085 		if (err->code != GOT_ERR_COMMIT_NO_CHANGES)
9086 			goto done;
9087 		err = show_histedit_progress(commit, hle, NULL);
9088 	} else {
9089 		err = show_histedit_progress(commit, hle, new_commit_id);
9090 		free(new_commit_id);
9091 	}
9092 done:
9093 	got_object_commit_close(commit);
9094 	return err;
9095 }
9096 
9097 static const struct got_error *
9098 histedit_skip_commit(struct got_histedit_list_entry *hle,
9099     struct got_worktree *worktree, struct got_repository *repo)
9100 {
9101 	const struct got_error *error;
9102 	struct got_commit_object *commit;
9103 
9104 	error = got_worktree_histedit_skip_commit(worktree, hle->commit_id,
9105 	    repo);
9106 	if (error)
9107 		return error;
9108 
9109 	error = got_object_open_as_commit(&commit, repo, hle->commit_id);
9110 	if (error)
9111 		return error;
9112 
9113 	error = show_histedit_progress(commit, hle, NULL);
9114 	got_object_commit_close(commit);
9115 	return error;
9116 }
9117 
9118 static const struct got_error *
9119 check_local_changes(void *arg, unsigned char status,
9120     unsigned char staged_status, const char *path,
9121     struct got_object_id *blob_id, struct got_object_id *staged_blob_id,
9122     struct got_object_id *commit_id, int dirfd, const char *de_name)
9123 {
9124 	int *have_local_changes = arg;
9125 
9126 	switch (status) {
9127 	case GOT_STATUS_ADD:
9128 	case GOT_STATUS_DELETE:
9129 	case GOT_STATUS_MODIFY:
9130 	case GOT_STATUS_CONFLICT:
9131 		*have_local_changes = 1;
9132 		return got_error(GOT_ERR_CANCELLED);
9133 	default:
9134 		break;
9135 	}
9136 
9137 	switch (staged_status) {
9138 	case GOT_STATUS_ADD:
9139 	case GOT_STATUS_DELETE:
9140 	case GOT_STATUS_MODIFY:
9141 		*have_local_changes = 1;
9142 		return got_error(GOT_ERR_CANCELLED);
9143 	default:
9144 		break;
9145 	}
9146 
9147 	return NULL;
9148 }
9149 
9150 static const struct got_error *
9151 cmd_histedit(int argc, char *argv[])
9152 {
9153 	const struct got_error *error = NULL;
9154 	struct got_worktree *worktree = NULL;
9155 	struct got_fileindex *fileindex = NULL;
9156 	struct got_repository *repo = NULL;
9157 	char *cwd = NULL;
9158 	struct got_reference *branch = NULL;
9159 	struct got_reference *tmp_branch = NULL;
9160 	struct got_object_id *resume_commit_id = NULL;
9161 	struct got_object_id *base_commit_id = NULL;
9162 	struct got_object_id *head_commit_id = NULL;
9163 	struct got_commit_object *commit = NULL;
9164 	int ch, rebase_in_progress = 0;
9165 	struct got_update_progress_arg upa;
9166 	int edit_in_progress = 0, abort_edit = 0, continue_edit = 0;
9167 	int edit_logmsg_only = 0, fold_only = 0;
9168 	int list_backups = 0;
9169 	const char *edit_script_path = NULL;
9170 	unsigned char rebase_status = GOT_STATUS_NO_CHANGE;
9171 	struct got_object_id_queue commits;
9172 	struct got_pathlist_head merged_paths;
9173 	const struct got_object_id_queue *parent_ids;
9174 	struct got_object_qid *pid;
9175 	struct got_histedit_list histedit_cmds;
9176 	struct got_histedit_list_entry *hle;
9177 
9178 	SIMPLEQ_INIT(&commits);
9179 	TAILQ_INIT(&histedit_cmds);
9180 	TAILQ_INIT(&merged_paths);
9181 	memset(&upa, 0, sizeof(upa));
9182 
9183 	while ((ch = getopt(argc, argv, "acfF:ml")) != -1) {
9184 		switch (ch) {
9185 		case 'a':
9186 			abort_edit = 1;
9187 			break;
9188 		case 'c':
9189 			continue_edit = 1;
9190 			break;
9191 		case 'f':
9192 			fold_only = 1;
9193 			break;
9194 		case 'F':
9195 			edit_script_path = optarg;
9196 			break;
9197 		case 'm':
9198 			edit_logmsg_only = 1;
9199 			break;
9200 		case 'l':
9201 			list_backups = 1;
9202 			break;
9203 		default:
9204 			usage_histedit();
9205 			/* NOTREACHED */
9206 		}
9207 	}
9208 
9209 	argc -= optind;
9210 	argv += optind;
9211 
9212 #ifndef PROFILE
9213 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
9214 	    "unveil", NULL) == -1)
9215 		err(1, "pledge");
9216 #endif
9217 	if (abort_edit && continue_edit)
9218 		option_conflict('a', 'c');
9219 	if (edit_script_path && edit_logmsg_only)
9220 		option_conflict('F', 'm');
9221 	if (abort_edit && edit_logmsg_only)
9222 		option_conflict('a', 'm');
9223 	if (continue_edit && edit_logmsg_only)
9224 		option_conflict('c', 'm');
9225 	if (abort_edit && fold_only)
9226 		option_conflict('a', 'f');
9227 	if (continue_edit && fold_only)
9228 		option_conflict('c', 'f');
9229 	if (fold_only && edit_logmsg_only)
9230 		option_conflict('f', 'm');
9231 	if (edit_script_path && fold_only)
9232 		option_conflict('F', 'f');
9233 	if (list_backups) {
9234 		if (abort_edit)
9235 			option_conflict('l', 'a');
9236 		if (continue_edit)
9237 			option_conflict('l', 'c');
9238 		if (edit_script_path)
9239 			option_conflict('l', 'F');
9240 		if (edit_logmsg_only)
9241 			option_conflict('l', 'm');
9242 		if (fold_only)
9243 			option_conflict('l', 'f');
9244 		if (argc != 0 && argc != 1)
9245 			usage_histedit();
9246 	} else if (argc != 0)
9247 		usage_histedit();
9248 
9249 	/*
9250 	 * This command cannot apply unveil(2) in all cases because the
9251 	 * user may choose to run an editor to edit the histedit script
9252 	 * and to edit individual commit log messages.
9253 	 * unveil(2) traverses exec(2); if an editor is used we have to
9254 	 * apply unveil after edit script and log messages have been written.
9255 	 * XXX TODO: Make use of unveil(2) where possible.
9256 	 */
9257 
9258 	cwd = getcwd(NULL, 0);
9259 	if (cwd == NULL) {
9260 		error = got_error_from_errno("getcwd");
9261 		goto done;
9262 	}
9263 	error = got_worktree_open(&worktree, cwd);
9264 	if (error) {
9265 		if (list_backups) {
9266 			if (error->code != GOT_ERR_NOT_WORKTREE)
9267 				goto done;
9268 		} else {
9269 			if (error->code == GOT_ERR_NOT_WORKTREE)
9270 				error = wrap_not_worktree_error(error,
9271 				    "histedit", cwd);
9272 			goto done;
9273 		}
9274 	}
9275 
9276 	if (list_backups) {
9277 		error = got_repo_open(&repo,
9278 		    worktree ? got_worktree_get_repo_path(worktree) : cwd,
9279 		    NULL);
9280 		if (error != NULL)
9281 			goto done;
9282 		error = apply_unveil(got_repo_get_path(repo), 0,
9283 		    worktree ? got_worktree_get_root_path(worktree) : NULL);
9284 		if (error)
9285 			goto done;
9286 		error = list_backup_refs(
9287 		    GOT_WORKTREE_HISTEDIT_BACKUP_REF_PREFIX,
9288 		    argc == 1 ? argv[0] : NULL, repo);
9289 		goto done; /* nothing else to do */
9290 	}
9291 
9292 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
9293 	    NULL);
9294 	if (error != NULL)
9295 		goto done;
9296 
9297 	error = got_worktree_rebase_in_progress(&rebase_in_progress, worktree);
9298 	if (error)
9299 		goto done;
9300 	if (rebase_in_progress) {
9301 		error = got_error(GOT_ERR_REBASING);
9302 		goto done;
9303 	}
9304 
9305 	error = got_worktree_histedit_in_progress(&edit_in_progress, worktree);
9306 	if (error)
9307 		goto done;
9308 
9309 	if (edit_in_progress && edit_logmsg_only) {
9310 		error = got_error_msg(GOT_ERR_HISTEDIT_BUSY,
9311 		    "histedit operation is in progress in this "
9312 		    "work tree and must be continued or aborted "
9313 		    "before the -m option can be used");
9314 		goto done;
9315 	}
9316 	if (edit_in_progress && fold_only) {
9317 		error = got_error_msg(GOT_ERR_HISTEDIT_BUSY,
9318 		    "histedit operation is in progress in this "
9319 		    "work tree and must be continued or aborted "
9320 		    "before the -f option can be used");
9321 		goto done;
9322 	}
9323 
9324 	if (edit_in_progress && abort_edit) {
9325 		error = got_worktree_histedit_continue(&resume_commit_id,
9326 		    &tmp_branch, &branch, &base_commit_id, &fileindex,
9327 		    worktree, repo);
9328 		if (error)
9329 			goto done;
9330 		printf("Switching work tree to %s\n",
9331 		    got_ref_get_symref_target(branch));
9332 		error = got_worktree_histedit_abort(worktree, fileindex, repo,
9333 		    branch, base_commit_id, update_progress, &upa);
9334 		if (error)
9335 			goto done;
9336 		printf("Histedit of %s aborted\n",
9337 		    got_ref_get_symref_target(branch));
9338 		print_update_progress_stats(&upa);
9339 		goto done; /* nothing else to do */
9340 	} else if (abort_edit) {
9341 		error = got_error(GOT_ERR_NOT_HISTEDIT);
9342 		goto done;
9343 	}
9344 
9345 	if (continue_edit) {
9346 		char *path;
9347 
9348 		if (!edit_in_progress) {
9349 			error = got_error(GOT_ERR_NOT_HISTEDIT);
9350 			goto done;
9351 		}
9352 
9353 		error = got_worktree_get_histedit_script_path(&path, worktree);
9354 		if (error)
9355 			goto done;
9356 
9357 		error = histedit_load_list(&histedit_cmds, path, repo);
9358 		free(path);
9359 		if (error)
9360 			goto done;
9361 
9362 		error = got_worktree_histedit_continue(&resume_commit_id,
9363 		    &tmp_branch, &branch, &base_commit_id, &fileindex,
9364 		    worktree, repo);
9365 		if (error)
9366 			goto done;
9367 
9368 		error = got_ref_resolve(&head_commit_id, repo, branch);
9369 		if (error)
9370 			goto done;
9371 
9372 		error = got_object_open_as_commit(&commit, repo,
9373 		    head_commit_id);
9374 		if (error)
9375 			goto done;
9376 		parent_ids = got_object_commit_get_parent_ids(commit);
9377 		pid = SIMPLEQ_FIRST(parent_ids);
9378 		if (pid == NULL) {
9379 			error = got_error(GOT_ERR_EMPTY_HISTEDIT);
9380 			goto done;
9381 		}
9382 		error = collect_commits(&commits, head_commit_id, pid->id,
9383 		    base_commit_id, got_worktree_get_path_prefix(worktree),
9384 		    GOT_ERR_HISTEDIT_PATH, repo);
9385 		got_object_commit_close(commit);
9386 		commit = NULL;
9387 		if (error)
9388 			goto done;
9389 	} else {
9390 		if (edit_in_progress) {
9391 			error = got_error(GOT_ERR_HISTEDIT_BUSY);
9392 			goto done;
9393 		}
9394 
9395 		error = got_ref_open(&branch, repo,
9396 		    got_worktree_get_head_ref_name(worktree), 0);
9397 		if (error != NULL)
9398 			goto done;
9399 
9400 		if (strncmp(got_ref_get_name(branch), "refs/heads/", 11) != 0) {
9401 			error = got_error_msg(GOT_ERR_COMMIT_BRANCH,
9402 			    "will not edit commit history of a branch outside "
9403 			    "the \"refs/heads/\" reference namespace");
9404 			goto done;
9405 		}
9406 
9407 		error = got_ref_resolve(&head_commit_id, repo, branch);
9408 		got_ref_close(branch);
9409 		branch = NULL;
9410 		if (error)
9411 			goto done;
9412 
9413 		error = got_object_open_as_commit(&commit, repo,
9414 		    head_commit_id);
9415 		if (error)
9416 			goto done;
9417 		parent_ids = got_object_commit_get_parent_ids(commit);
9418 		pid = SIMPLEQ_FIRST(parent_ids);
9419 		if (pid == NULL) {
9420 			error = got_error(GOT_ERR_EMPTY_HISTEDIT);
9421 			goto done;
9422 		}
9423 		error = collect_commits(&commits, head_commit_id, pid->id,
9424 		    got_worktree_get_base_commit_id(worktree),
9425 		    got_worktree_get_path_prefix(worktree),
9426 		    GOT_ERR_HISTEDIT_PATH, repo);
9427 		got_object_commit_close(commit);
9428 		commit = NULL;
9429 		if (error)
9430 			goto done;
9431 
9432 		if (SIMPLEQ_EMPTY(&commits)) {
9433 			error = got_error(GOT_ERR_EMPTY_HISTEDIT);
9434 			goto done;
9435 		}
9436 
9437 		error = got_worktree_histedit_prepare(&tmp_branch, &branch,
9438 		    &base_commit_id, &fileindex, worktree, repo);
9439 		if (error)
9440 			goto done;
9441 
9442 		if (edit_script_path) {
9443 			error = histedit_load_list(&histedit_cmds,
9444 			    edit_script_path, repo);
9445 			if (error) {
9446 				got_worktree_histedit_abort(worktree, fileindex,
9447 				    repo, branch, base_commit_id,
9448 				    update_progress, &upa);
9449 				print_update_progress_stats(&upa);
9450 				goto done;
9451 			}
9452 		} else {
9453 			const char *branch_name;
9454 			branch_name = got_ref_get_symref_target(branch);
9455 			if (strncmp(branch_name, "refs/heads/", 11) == 0)
9456 				branch_name += 11;
9457 			error = histedit_edit_script(&histedit_cmds, &commits,
9458 			    branch_name, edit_logmsg_only, fold_only, repo);
9459 			if (error) {
9460 				got_worktree_histedit_abort(worktree, fileindex,
9461 				    repo, branch, base_commit_id,
9462 				    update_progress, &upa);
9463 				print_update_progress_stats(&upa);
9464 				goto done;
9465 			}
9466 
9467 		}
9468 
9469 		error = histedit_save_list(&histedit_cmds, worktree,
9470 		    repo);
9471 		if (error) {
9472 			got_worktree_histedit_abort(worktree, fileindex,
9473 			    repo, branch, base_commit_id,
9474 			    update_progress, &upa);
9475 			print_update_progress_stats(&upa);
9476 			goto done;
9477 		}
9478 
9479 	}
9480 
9481 	error = histedit_check_script(&histedit_cmds, &commits, repo);
9482 	if (error)
9483 		goto done;
9484 
9485 	TAILQ_FOREACH(hle, &histedit_cmds, entry) {
9486 		if (resume_commit_id) {
9487 			if (got_object_id_cmp(hle->commit_id,
9488 			    resume_commit_id) != 0)
9489 				continue;
9490 
9491 			resume_commit_id = NULL;
9492 			if (hle->cmd->code == GOT_HISTEDIT_DROP ||
9493 			    hle->cmd->code == GOT_HISTEDIT_FOLD) {
9494 				error = histedit_skip_commit(hle, worktree,
9495 				    repo);
9496 				if (error)
9497 					goto done;
9498 			} else {
9499 				struct got_pathlist_head paths;
9500 				int have_changes = 0;
9501 
9502 				TAILQ_INIT(&paths);
9503 				error = got_pathlist_append(&paths, "", NULL);
9504 				if (error)
9505 					goto done;
9506 				error = got_worktree_status(worktree, &paths,
9507 				    repo, check_local_changes, &have_changes,
9508 				    check_cancelled, NULL);
9509 				got_pathlist_free(&paths);
9510 				if (error) {
9511 					if (error->code != GOT_ERR_CANCELLED)
9512 						goto done;
9513 					if (sigint_received || sigpipe_received)
9514 						goto done;
9515 				}
9516 				if (have_changes) {
9517 					error = histedit_commit(NULL, worktree,
9518 					    fileindex, tmp_branch, hle, repo);
9519 					if (error)
9520 						goto done;
9521 				} else {
9522 					error = got_object_open_as_commit(
9523 					    &commit, repo, hle->commit_id);
9524 					if (error)
9525 						goto done;
9526 					error = show_histedit_progress(commit,
9527 					    hle, NULL);
9528 					got_object_commit_close(commit);
9529 					commit = NULL;
9530 					if (error)
9531 						goto done;
9532 				}
9533 			}
9534 			continue;
9535 		}
9536 
9537 		if (hle->cmd->code == GOT_HISTEDIT_DROP) {
9538 			error = histedit_skip_commit(hle, worktree, repo);
9539 			if (error)
9540 				goto done;
9541 			continue;
9542 		}
9543 
9544 		error = got_object_open_as_commit(&commit, repo,
9545 		    hle->commit_id);
9546 		if (error)
9547 			goto done;
9548 		parent_ids = got_object_commit_get_parent_ids(commit);
9549 		pid = SIMPLEQ_FIRST(parent_ids);
9550 
9551 		error = got_worktree_histedit_merge_files(&merged_paths,
9552 		    worktree, fileindex, pid->id, hle->commit_id, repo,
9553 		    update_progress, &upa, check_cancelled, NULL);
9554 		if (error)
9555 			goto done;
9556 		got_object_commit_close(commit);
9557 		commit = NULL;
9558 
9559 		print_update_progress_stats(&upa);
9560 		if (upa.conflicts > 0)
9561 			rebase_status = GOT_STATUS_CONFLICT;
9562 
9563 		if (rebase_status == GOT_STATUS_CONFLICT) {
9564 			error = show_rebase_merge_conflict(hle->commit_id,
9565 			    repo);
9566 			if (error)
9567 				goto done;
9568 			got_worktree_rebase_pathlist_free(&merged_paths);
9569 			break;
9570 		}
9571 
9572 		if (hle->cmd->code == GOT_HISTEDIT_EDIT) {
9573 			char *id_str;
9574 			error = got_object_id_str(&id_str, hle->commit_id);
9575 			if (error)
9576 				goto done;
9577 			printf("Stopping histedit for amending commit %s\n",
9578 			    id_str);
9579 			free(id_str);
9580 			got_worktree_rebase_pathlist_free(&merged_paths);
9581 			error = got_worktree_histedit_postpone(worktree,
9582 			    fileindex);
9583 			goto done;
9584 		}
9585 
9586 		if (hle->cmd->code == GOT_HISTEDIT_FOLD) {
9587 			error = histedit_skip_commit(hle, worktree, repo);
9588 			if (error)
9589 				goto done;
9590 			continue;
9591 		}
9592 
9593 		error = histedit_commit(&merged_paths, worktree, fileindex,
9594 		    tmp_branch, hle, repo);
9595 		got_worktree_rebase_pathlist_free(&merged_paths);
9596 		if (error)
9597 			goto done;
9598 	}
9599 
9600 	if (rebase_status == GOT_STATUS_CONFLICT) {
9601 		error = got_worktree_histedit_postpone(worktree, fileindex);
9602 		if (error)
9603 			goto done;
9604 		error = got_error_msg(GOT_ERR_CONFLICTS,
9605 		    "conflicts must be resolved before histedit can continue");
9606 	} else
9607 		error = histedit_complete(worktree, fileindex, tmp_branch,
9608 		    branch, repo);
9609 done:
9610 	got_object_id_queue_free(&commits);
9611 	histedit_free_list(&histedit_cmds);
9612 	free(head_commit_id);
9613 	free(base_commit_id);
9614 	free(resume_commit_id);
9615 	if (commit)
9616 		got_object_commit_close(commit);
9617 	if (branch)
9618 		got_ref_close(branch);
9619 	if (tmp_branch)
9620 		got_ref_close(tmp_branch);
9621 	if (worktree)
9622 		got_worktree_close(worktree);
9623 	if (repo)
9624 		got_repo_close(repo);
9625 	return error;
9626 }
9627 
9628 __dead static void
9629 usage_integrate(void)
9630 {
9631 	fprintf(stderr, "usage: %s integrate branch\n", getprogname());
9632 	exit(1);
9633 }
9634 
9635 static const struct got_error *
9636 cmd_integrate(int argc, char *argv[])
9637 {
9638 	const struct got_error *error = NULL;
9639 	struct got_repository *repo = NULL;
9640 	struct got_worktree *worktree = NULL;
9641 	char *cwd = NULL, *refname = NULL, *base_refname = NULL;
9642 	const char *branch_arg = NULL;
9643 	struct got_reference *branch_ref = NULL, *base_branch_ref = NULL;
9644 	struct got_fileindex *fileindex = NULL;
9645 	struct got_object_id *commit_id = NULL, *base_commit_id = NULL;
9646 	int ch;
9647 	struct got_update_progress_arg upa;
9648 
9649 	while ((ch = getopt(argc, argv, "")) != -1) {
9650 		switch (ch) {
9651 		default:
9652 			usage_integrate();
9653 			/* NOTREACHED */
9654 		}
9655 	}
9656 
9657 	argc -= optind;
9658 	argv += optind;
9659 
9660 	if (argc != 1)
9661 		usage_integrate();
9662 	branch_arg = argv[0];
9663 #ifndef PROFILE
9664 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
9665 	    "unveil", NULL) == -1)
9666 		err(1, "pledge");
9667 #endif
9668 	cwd = getcwd(NULL, 0);
9669 	if (cwd == NULL) {
9670 		error = got_error_from_errno("getcwd");
9671 		goto done;
9672 	}
9673 
9674 	error = got_worktree_open(&worktree, cwd);
9675 	if (error) {
9676 		if (error->code == GOT_ERR_NOT_WORKTREE)
9677 			error = wrap_not_worktree_error(error, "integrate",
9678 			    cwd);
9679 		goto done;
9680 	}
9681 
9682 	error = check_rebase_or_histedit_in_progress(worktree);
9683 	if (error)
9684 		goto done;
9685 
9686 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
9687 	    NULL);
9688 	if (error != NULL)
9689 		goto done;
9690 
9691 	error = apply_unveil(got_repo_get_path(repo), 0,
9692 	    got_worktree_get_root_path(worktree));
9693 	if (error)
9694 		goto done;
9695 
9696 	if (asprintf(&refname, "refs/heads/%s", branch_arg) == -1) {
9697 		error = got_error_from_errno("asprintf");
9698 		goto done;
9699 	}
9700 
9701 	error = got_worktree_integrate_prepare(&fileindex, &branch_ref,
9702 	    &base_branch_ref, worktree, refname, repo);
9703 	if (error)
9704 		goto done;
9705 
9706 	refname = strdup(got_ref_get_name(branch_ref));
9707 	if (refname == NULL) {
9708 		error = got_error_from_errno("strdup");
9709 		got_worktree_integrate_abort(worktree, fileindex, repo,
9710 		    branch_ref, base_branch_ref);
9711 		goto done;
9712 	}
9713 	base_refname = strdup(got_ref_get_name(base_branch_ref));
9714 	if (base_refname == NULL) {
9715 		error = got_error_from_errno("strdup");
9716 		got_worktree_integrate_abort(worktree, fileindex, repo,
9717 		    branch_ref, base_branch_ref);
9718 		goto done;
9719 	}
9720 
9721 	error = got_ref_resolve(&commit_id, repo, branch_ref);
9722 	if (error)
9723 		goto done;
9724 
9725 	error = got_ref_resolve(&base_commit_id, repo, base_branch_ref);
9726 	if (error)
9727 		goto done;
9728 
9729 	if (got_object_id_cmp(commit_id, base_commit_id) == 0) {
9730 		error = got_error_msg(GOT_ERR_SAME_BRANCH,
9731 		    "specified branch has already been integrated");
9732 		got_worktree_integrate_abort(worktree, fileindex, repo,
9733 		    branch_ref, base_branch_ref);
9734 		goto done;
9735 	}
9736 
9737 	error = check_linear_ancestry(commit_id, base_commit_id, 1, repo);
9738 	if (error) {
9739 		if (error->code == GOT_ERR_ANCESTRY)
9740 			error = got_error(GOT_ERR_REBASE_REQUIRED);
9741 		got_worktree_integrate_abort(worktree, fileindex, repo,
9742 		    branch_ref, base_branch_ref);
9743 		goto done;
9744 	}
9745 
9746 	memset(&upa, 0, sizeof(upa));
9747 	error = got_worktree_integrate_continue(worktree, fileindex, repo,
9748 	    branch_ref, base_branch_ref, update_progress, &upa,
9749 	    check_cancelled, NULL);
9750 	if (error)
9751 		goto done;
9752 
9753 	printf("Integrated %s into %s\n", refname, base_refname);
9754 	print_update_progress_stats(&upa);
9755 done:
9756 	if (repo)
9757 		got_repo_close(repo);
9758 	if (worktree)
9759 		got_worktree_close(worktree);
9760 	free(cwd);
9761 	free(base_commit_id);
9762 	free(commit_id);
9763 	free(refname);
9764 	free(base_refname);
9765 	return error;
9766 }
9767 
9768 __dead static void
9769 usage_stage(void)
9770 {
9771 	fprintf(stderr, "usage: %s stage [-l] | [-p] [-F response-script] "
9772 	    "[-S] [file-path ...]\n",
9773 	    getprogname());
9774 	exit(1);
9775 }
9776 
9777 static const struct got_error *
9778 print_stage(void *arg, unsigned char status, unsigned char staged_status,
9779     const char *path, struct got_object_id *blob_id,
9780     struct got_object_id *staged_blob_id, struct got_object_id *commit_id,
9781     int dirfd, const char *de_name)
9782 {
9783 	const struct got_error *err = NULL;
9784 	char *id_str = NULL;
9785 
9786 	if (staged_status != GOT_STATUS_ADD &&
9787 	    staged_status != GOT_STATUS_MODIFY &&
9788 	    staged_status != GOT_STATUS_DELETE)
9789 		return NULL;
9790 
9791 	if (staged_status == GOT_STATUS_ADD ||
9792 	    staged_status == GOT_STATUS_MODIFY)
9793 		err = got_object_id_str(&id_str, staged_blob_id);
9794 	else
9795 		err = got_object_id_str(&id_str, blob_id);
9796 	if (err)
9797 		return err;
9798 
9799 	printf("%s %c %s\n", id_str, staged_status, path);
9800 	free(id_str);
9801 	return NULL;
9802 }
9803 
9804 static const struct got_error *
9805 cmd_stage(int argc, char *argv[])
9806 {
9807 	const struct got_error *error = NULL;
9808 	struct got_repository *repo = NULL;
9809 	struct got_worktree *worktree = NULL;
9810 	char *cwd = NULL;
9811 	struct got_pathlist_head paths;
9812 	struct got_pathlist_entry *pe;
9813 	int ch, list_stage = 0, pflag = 0, allow_bad_symlinks = 0;
9814 	FILE *patch_script_file = NULL;
9815 	const char *patch_script_path = NULL;
9816 	struct choose_patch_arg cpa;
9817 
9818 	TAILQ_INIT(&paths);
9819 
9820 	while ((ch = getopt(argc, argv, "lpF:S")) != -1) {
9821 		switch (ch) {
9822 		case 'l':
9823 			list_stage = 1;
9824 			break;
9825 		case 'p':
9826 			pflag = 1;
9827 			break;
9828 		case 'F':
9829 			patch_script_path = optarg;
9830 			break;
9831 		case 'S':
9832 			allow_bad_symlinks = 1;
9833 			break;
9834 		default:
9835 			usage_stage();
9836 			/* NOTREACHED */
9837 		}
9838 	}
9839 
9840 	argc -= optind;
9841 	argv += optind;
9842 
9843 #ifndef PROFILE
9844 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
9845 	    "unveil", NULL) == -1)
9846 		err(1, "pledge");
9847 #endif
9848 	if (list_stage && (pflag || patch_script_path))
9849 		errx(1, "-l option cannot be used with other options");
9850 	if (patch_script_path && !pflag)
9851 		errx(1, "-F option can only be used together with -p option");
9852 
9853 	cwd = getcwd(NULL, 0);
9854 	if (cwd == NULL) {
9855 		error = got_error_from_errno("getcwd");
9856 		goto done;
9857 	}
9858 
9859 	error = got_worktree_open(&worktree, cwd);
9860 	if (error) {
9861 		if (error->code == GOT_ERR_NOT_WORKTREE)
9862 			error = wrap_not_worktree_error(error, "stage", cwd);
9863 		goto done;
9864 	}
9865 
9866 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
9867 	    NULL);
9868 	if (error != NULL)
9869 		goto done;
9870 
9871 	if (patch_script_path) {
9872 		patch_script_file = fopen(patch_script_path, "r");
9873 		if (patch_script_file == NULL) {
9874 			error = got_error_from_errno2("fopen",
9875 			    patch_script_path);
9876 			goto done;
9877 		}
9878 	}
9879 	error = apply_unveil(got_repo_get_path(repo), 0,
9880 	    got_worktree_get_root_path(worktree));
9881 	if (error)
9882 		goto done;
9883 
9884 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
9885 	if (error)
9886 		goto done;
9887 
9888 	if (list_stage)
9889 		error = got_worktree_status(worktree, &paths, repo,
9890 		    print_stage, NULL, check_cancelled, NULL);
9891 	else {
9892 		cpa.patch_script_file = patch_script_file;
9893 		cpa.action = "stage";
9894 		error = got_worktree_stage(worktree, &paths,
9895 		    pflag ? NULL : print_status, NULL,
9896 		    pflag ? choose_patch : NULL, &cpa,
9897 		    allow_bad_symlinks, repo);
9898 	}
9899 done:
9900 	if (patch_script_file && fclose(patch_script_file) == EOF &&
9901 	    error == NULL)
9902 		error = got_error_from_errno2("fclose", patch_script_path);
9903 	if (repo)
9904 		got_repo_close(repo);
9905 	if (worktree)
9906 		got_worktree_close(worktree);
9907 	TAILQ_FOREACH(pe, &paths, entry)
9908 		free((char *)pe->path);
9909 	got_pathlist_free(&paths);
9910 	free(cwd);
9911 	return error;
9912 }
9913 
9914 __dead static void
9915 usage_unstage(void)
9916 {
9917 	fprintf(stderr, "usage: %s unstage [-p] [-F response-script] "
9918 	    "[file-path ...]\n",
9919 	    getprogname());
9920 	exit(1);
9921 }
9922 
9923 
9924 static const struct got_error *
9925 cmd_unstage(int argc, char *argv[])
9926 {
9927 	const struct got_error *error = NULL;
9928 	struct got_repository *repo = NULL;
9929 	struct got_worktree *worktree = NULL;
9930 	char *cwd = NULL;
9931 	struct got_pathlist_head paths;
9932 	struct got_pathlist_entry *pe;
9933 	int ch, pflag = 0;
9934 	struct got_update_progress_arg upa;
9935 	FILE *patch_script_file = NULL;
9936 	const char *patch_script_path = NULL;
9937 	struct choose_patch_arg cpa;
9938 
9939 	TAILQ_INIT(&paths);
9940 
9941 	while ((ch = getopt(argc, argv, "pF:")) != -1) {
9942 		switch (ch) {
9943 		case 'p':
9944 			pflag = 1;
9945 			break;
9946 		case 'F':
9947 			patch_script_path = optarg;
9948 			break;
9949 		default:
9950 			usage_unstage();
9951 			/* NOTREACHED */
9952 		}
9953 	}
9954 
9955 	argc -= optind;
9956 	argv += optind;
9957 
9958 #ifndef PROFILE
9959 	if (pledge("stdio rpath wpath cpath fattr flock proc exec sendfd "
9960 	    "unveil", NULL) == -1)
9961 		err(1, "pledge");
9962 #endif
9963 	if (patch_script_path && !pflag)
9964 		errx(1, "-F option can only be used together with -p option");
9965 
9966 	cwd = getcwd(NULL, 0);
9967 	if (cwd == NULL) {
9968 		error = got_error_from_errno("getcwd");
9969 		goto done;
9970 	}
9971 
9972 	error = got_worktree_open(&worktree, cwd);
9973 	if (error) {
9974 		if (error->code == GOT_ERR_NOT_WORKTREE)
9975 			error = wrap_not_worktree_error(error, "unstage", cwd);
9976 		goto done;
9977 	}
9978 
9979 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree),
9980 	    NULL);
9981 	if (error != NULL)
9982 		goto done;
9983 
9984 	if (patch_script_path) {
9985 		patch_script_file = fopen(patch_script_path, "r");
9986 		if (patch_script_file == NULL) {
9987 			error = got_error_from_errno2("fopen",
9988 			    patch_script_path);
9989 			goto done;
9990 		}
9991 	}
9992 
9993 	error = apply_unveil(got_repo_get_path(repo), 0,
9994 	    got_worktree_get_root_path(worktree));
9995 	if (error)
9996 		goto done;
9997 
9998 	error = get_worktree_paths_from_argv(&paths, argc, argv, worktree);
9999 	if (error)
10000 		goto done;
10001 
10002 	cpa.patch_script_file = patch_script_file;
10003 	cpa.action = "unstage";
10004 	memset(&upa, 0, sizeof(upa));
10005 	error = got_worktree_unstage(worktree, &paths, update_progress,
10006 	    &upa, pflag ? choose_patch : NULL, &cpa, repo);
10007 	if (!error)
10008 		print_update_progress_stats(&upa);
10009 done:
10010 	if (patch_script_file && fclose(patch_script_file) == EOF &&
10011 	    error == NULL)
10012 		error = got_error_from_errno2("fclose", patch_script_path);
10013 	if (repo)
10014 		got_repo_close(repo);
10015 	if (worktree)
10016 		got_worktree_close(worktree);
10017 	TAILQ_FOREACH(pe, &paths, entry)
10018 		free((char *)pe->path);
10019 	got_pathlist_free(&paths);
10020 	free(cwd);
10021 	return error;
10022 }
10023 
10024 __dead static void
10025 usage_cat(void)
10026 {
10027 	fprintf(stderr, "usage: %s cat [-r repository ] [ -c commit ] [ -P ] "
10028 	    "arg1 [arg2 ...]\n", getprogname());
10029 	exit(1);
10030 }
10031 
10032 static const struct got_error *
10033 cat_blob(struct got_object_id *id, struct got_repository *repo, FILE *outfile)
10034 {
10035 	const struct got_error *err;
10036 	struct got_blob_object *blob;
10037 
10038 	err = got_object_open_as_blob(&blob, repo, id, 8192);
10039 	if (err)
10040 		return err;
10041 
10042 	err = got_object_blob_dump_to_file(NULL, NULL, NULL, outfile, blob);
10043 	got_object_blob_close(blob);
10044 	return err;
10045 }
10046 
10047 static const struct got_error *
10048 cat_tree(struct got_object_id *id, struct got_repository *repo, FILE *outfile)
10049 {
10050 	const struct got_error *err;
10051 	struct got_tree_object *tree;
10052 	int nentries, i;
10053 
10054 	err = got_object_open_as_tree(&tree, repo, id);
10055 	if (err)
10056 		return err;
10057 
10058 	nentries = got_object_tree_get_nentries(tree);
10059 	for (i = 0; i < nentries; i++) {
10060 		struct got_tree_entry *te;
10061 		char *id_str;
10062 		if (sigint_received || sigpipe_received)
10063 			break;
10064 		te = got_object_tree_get_entry(tree, i);
10065 		err = got_object_id_str(&id_str, got_tree_entry_get_id(te));
10066 		if (err)
10067 			break;
10068 		fprintf(outfile, "%s %.7o %s\n", id_str,
10069 		    got_tree_entry_get_mode(te),
10070 		    got_tree_entry_get_name(te));
10071 		free(id_str);
10072 	}
10073 
10074 	got_object_tree_close(tree);
10075 	return err;
10076 }
10077 
10078 static const struct got_error *
10079 cat_commit(struct got_object_id *id, struct got_repository *repo, FILE *outfile)
10080 {
10081 	const struct got_error *err;
10082 	struct got_commit_object *commit;
10083 	const struct got_object_id_queue *parent_ids;
10084 	struct got_object_qid *pid;
10085 	char *id_str = NULL;
10086 	const char *logmsg = NULL;
10087 
10088 	err = got_object_open_as_commit(&commit, repo, id);
10089 	if (err)
10090 		return err;
10091 
10092 	err = got_object_id_str(&id_str, got_object_commit_get_tree_id(commit));
10093 	if (err)
10094 		goto done;
10095 
10096 	fprintf(outfile, "%s%s\n", GOT_COMMIT_LABEL_TREE, id_str);
10097 	parent_ids = got_object_commit_get_parent_ids(commit);
10098 	fprintf(outfile, "numparents %d\n",
10099 	    got_object_commit_get_nparents(commit));
10100 	SIMPLEQ_FOREACH(pid, parent_ids, entry) {
10101 		char *pid_str;
10102 		err = got_object_id_str(&pid_str, pid->id);
10103 		if (err)
10104 			goto done;
10105 		fprintf(outfile, "%s%s\n", GOT_COMMIT_LABEL_PARENT, pid_str);
10106 		free(pid_str);
10107 	}
10108 	fprintf(outfile, "%s%s %lld +0000\n", GOT_COMMIT_LABEL_AUTHOR,
10109 	    got_object_commit_get_author(commit),
10110 	    (long long)got_object_commit_get_author_time(commit));
10111 
10112 	fprintf(outfile, "%s%s %lld +0000\n", GOT_COMMIT_LABEL_COMMITTER,
10113 	    got_object_commit_get_author(commit),
10114 	    (long long)got_object_commit_get_committer_time(commit));
10115 
10116 	logmsg = got_object_commit_get_logmsg_raw(commit);
10117 	fprintf(outfile, "messagelen %zd\n", strlen(logmsg));
10118 	fprintf(outfile, "%s", logmsg);
10119 done:
10120 	free(id_str);
10121 	got_object_commit_close(commit);
10122 	return err;
10123 }
10124 
10125 static const struct got_error *
10126 cat_tag(struct got_object_id *id, struct got_repository *repo, FILE *outfile)
10127 {
10128 	const struct got_error *err;
10129 	struct got_tag_object *tag;
10130 	char *id_str = NULL;
10131 	const char *tagmsg = NULL;
10132 
10133 	err = got_object_open_as_tag(&tag, repo, id);
10134 	if (err)
10135 		return err;
10136 
10137 	err = got_object_id_str(&id_str, got_object_tag_get_object_id(tag));
10138 	if (err)
10139 		goto done;
10140 
10141 	fprintf(outfile, "%s%s\n", GOT_TAG_LABEL_OBJECT, id_str);
10142 
10143 	switch (got_object_tag_get_object_type(tag)) {
10144 	case GOT_OBJ_TYPE_BLOB:
10145 		fprintf(outfile, "%s%s\n", GOT_TAG_LABEL_TYPE,
10146 		    GOT_OBJ_LABEL_BLOB);
10147 		break;
10148 	case GOT_OBJ_TYPE_TREE:
10149 		fprintf(outfile, "%s%s\n", GOT_TAG_LABEL_TYPE,
10150 		    GOT_OBJ_LABEL_TREE);
10151 		break;
10152 	case GOT_OBJ_TYPE_COMMIT:
10153 		fprintf(outfile, "%s%s\n", GOT_TAG_LABEL_TYPE,
10154 		    GOT_OBJ_LABEL_COMMIT);
10155 		break;
10156 	case GOT_OBJ_TYPE_TAG:
10157 		fprintf(outfile, "%s%s\n", GOT_TAG_LABEL_TYPE,
10158 		    GOT_OBJ_LABEL_TAG);
10159 		break;
10160 	default:
10161 		break;
10162 	}
10163 
10164 	fprintf(outfile, "%s%s\n", GOT_TAG_LABEL_TAG,
10165 	    got_object_tag_get_name(tag));
10166 
10167 	fprintf(outfile, "%s%s %lld +0000\n", GOT_TAG_LABEL_TAGGER,
10168 	    got_object_tag_get_tagger(tag),
10169 	    (long long)got_object_tag_get_tagger_time(tag));
10170 
10171 	tagmsg = got_object_tag_get_message(tag);
10172 	fprintf(outfile, "messagelen %zd\n", strlen(tagmsg));
10173 	fprintf(outfile, "%s", tagmsg);
10174 done:
10175 	free(id_str);
10176 	got_object_tag_close(tag);
10177 	return err;
10178 }
10179 
10180 static const struct got_error *
10181 cmd_cat(int argc, char *argv[])
10182 {
10183 	const struct got_error *error;
10184 	struct got_repository *repo = NULL;
10185 	struct got_worktree *worktree = NULL;
10186 	char *cwd = NULL, *repo_path = NULL, *label = NULL;
10187 	const char *commit_id_str = NULL;
10188 	struct got_object_id *id = NULL, *commit_id = NULL;
10189 	int ch, obj_type, i, force_path = 0;
10190 	struct got_reflist_head refs;
10191 
10192 	TAILQ_INIT(&refs);
10193 
10194 #ifndef PROFILE
10195 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
10196 	    NULL) == -1)
10197 		err(1, "pledge");
10198 #endif
10199 
10200 	while ((ch = getopt(argc, argv, "c:r:P")) != -1) {
10201 		switch (ch) {
10202 		case 'c':
10203 			commit_id_str = optarg;
10204 			break;
10205 		case 'r':
10206 			repo_path = realpath(optarg, NULL);
10207 			if (repo_path == NULL)
10208 				return got_error_from_errno2("realpath",
10209 				    optarg);
10210 			got_path_strip_trailing_slashes(repo_path);
10211 			break;
10212 		case 'P':
10213 			force_path = 1;
10214 			break;
10215 		default:
10216 			usage_cat();
10217 			/* NOTREACHED */
10218 		}
10219 	}
10220 
10221 	argc -= optind;
10222 	argv += optind;
10223 
10224 	cwd = getcwd(NULL, 0);
10225 	if (cwd == NULL) {
10226 		error = got_error_from_errno("getcwd");
10227 		goto done;
10228 	}
10229 	error = got_worktree_open(&worktree, cwd);
10230 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
10231 		goto done;
10232 	if (worktree) {
10233 		if (repo_path == NULL) {
10234 			repo_path = strdup(
10235 			    got_worktree_get_repo_path(worktree));
10236 			if (repo_path == NULL) {
10237 				error = got_error_from_errno("strdup");
10238 				goto done;
10239 			}
10240 		}
10241 	}
10242 
10243 	if (repo_path == NULL) {
10244 		repo_path = getcwd(NULL, 0);
10245 		if (repo_path == NULL)
10246 			return got_error_from_errno("getcwd");
10247 	}
10248 
10249 	error = got_repo_open(&repo, repo_path, NULL);
10250 	free(repo_path);
10251 	if (error != NULL)
10252 		goto done;
10253 
10254 	error = apply_unveil(got_repo_get_path(repo), 1, NULL);
10255 	if (error)
10256 		goto done;
10257 
10258 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
10259 	if (error)
10260 		goto done;
10261 
10262 	if (commit_id_str == NULL)
10263 		commit_id_str = GOT_REF_HEAD;
10264 	error = got_repo_match_object_id(&commit_id, NULL,
10265 	    commit_id_str, GOT_OBJ_TYPE_COMMIT, &refs, repo);
10266 	if (error)
10267 		goto done;
10268 
10269 	for (i = 0; i < argc; i++) {
10270 		if (force_path) {
10271 			error = got_object_id_by_path(&id, repo, commit_id,
10272 			    argv[i]);
10273 			if (error)
10274 				break;
10275 		} else {
10276 			error = got_repo_match_object_id(&id, &label, argv[i],
10277 			    GOT_OBJ_TYPE_ANY, NULL /* do not resolve tags */,
10278 			    repo);
10279 			if (error) {
10280 				if (error->code != GOT_ERR_BAD_OBJ_ID_STR &&
10281 				    error->code != GOT_ERR_NOT_REF)
10282 					break;
10283 				error = got_object_id_by_path(&id, repo,
10284 				    commit_id, argv[i]);
10285 				if (error)
10286 					break;
10287 			}
10288 		}
10289 
10290 		error = got_object_get_type(&obj_type, repo, id);
10291 		if (error)
10292 			break;
10293 
10294 		switch (obj_type) {
10295 		case GOT_OBJ_TYPE_BLOB:
10296 			error = cat_blob(id, repo, stdout);
10297 			break;
10298 		case GOT_OBJ_TYPE_TREE:
10299 			error = cat_tree(id, repo, stdout);
10300 			break;
10301 		case GOT_OBJ_TYPE_COMMIT:
10302 			error = cat_commit(id, repo, stdout);
10303 			break;
10304 		case GOT_OBJ_TYPE_TAG:
10305 			error = cat_tag(id, repo, stdout);
10306 			break;
10307 		default:
10308 			error = got_error(GOT_ERR_OBJ_TYPE);
10309 			break;
10310 		}
10311 		if (error)
10312 			break;
10313 		free(label);
10314 		label = NULL;
10315 		free(id);
10316 		id = NULL;
10317 	}
10318 done:
10319 	free(label);
10320 	free(id);
10321 	free(commit_id);
10322 	if (worktree)
10323 		got_worktree_close(worktree);
10324 	if (repo) {
10325 		const struct got_error *repo_error;
10326 		repo_error = got_repo_close(repo);
10327 		if (error == NULL)
10328 			error = repo_error;
10329 	}
10330 	got_ref_list_free(&refs);
10331 	return error;
10332 }
10333 
10334 __dead static void
10335 usage_info(void)
10336 {
10337 	fprintf(stderr, "usage: %s info [path ...]\n",
10338 	    getprogname());
10339 	exit(1);
10340 }
10341 
10342 static const struct got_error *
10343 print_path_info(void *arg, const char *path, mode_t mode, time_t mtime,
10344     struct got_object_id *blob_id, struct got_object_id *staged_blob_id,
10345     struct got_object_id *commit_id)
10346 {
10347 	const struct got_error *err = NULL;
10348 	char *id_str = NULL;
10349 	char datebuf[128];
10350 	struct tm mytm, *tm;
10351 	struct got_pathlist_head *paths = arg;
10352 	struct got_pathlist_entry *pe;
10353 
10354 	/*
10355 	 * Clear error indication from any of the path arguments which
10356 	 * would cause this file index entry to be displayed.
10357 	 */
10358 	TAILQ_FOREACH(pe, paths, entry) {
10359 		if (got_path_cmp(path, pe->path, strlen(path),
10360 		    pe->path_len) == 0 ||
10361 		    got_path_is_child(path, pe->path, pe->path_len))
10362 			pe->data = NULL; /* no error */
10363 	}
10364 
10365 	printf(GOT_COMMIT_SEP_STR);
10366 	if (S_ISLNK(mode))
10367 		printf("symlink: %s\n", path);
10368 	else if (S_ISREG(mode)) {
10369 		printf("file: %s\n", path);
10370 		printf("mode: %o\n", mode & (S_IRWXU | S_IRWXG | S_IRWXO));
10371 	} else if (S_ISDIR(mode))
10372 		printf("directory: %s\n", path);
10373 	else
10374 		printf("something: %s\n", path);
10375 
10376 	tm = localtime_r(&mtime, &mytm);
10377 	if (tm == NULL)
10378 		return NULL;
10379 	if (strftime(datebuf, sizeof(datebuf), "%c %Z", tm) == 0)
10380 		return got_error(GOT_ERR_NO_SPACE);
10381 	printf("timestamp: %s\n", datebuf);
10382 
10383 	if (blob_id) {
10384 		err = got_object_id_str(&id_str, blob_id);
10385 		if (err)
10386 			return err;
10387 		printf("based on blob: %s\n", id_str);
10388 		free(id_str);
10389 	}
10390 
10391 	if (staged_blob_id) {
10392 		err = got_object_id_str(&id_str, staged_blob_id);
10393 		if (err)
10394 			return err;
10395 		printf("based on staged blob: %s\n", id_str);
10396 		free(id_str);
10397 	}
10398 
10399 	if (commit_id) {
10400 		err = got_object_id_str(&id_str, commit_id);
10401 		if (err)
10402 			return err;
10403 		printf("based on commit: %s\n", id_str);
10404 		free(id_str);
10405 	}
10406 
10407 	return NULL;
10408 }
10409 
10410 static const struct got_error *
10411 cmd_info(int argc, char *argv[])
10412 {
10413 	const struct got_error *error = NULL;
10414 	struct got_worktree *worktree = NULL;
10415 	char *cwd = NULL, *id_str = NULL;
10416 	struct got_pathlist_head paths;
10417 	struct got_pathlist_entry *pe;
10418 	char *uuidstr = NULL;
10419 	int ch, show_files = 0;
10420 
10421 	TAILQ_INIT(&paths);
10422 
10423 	while ((ch = getopt(argc, argv, "")) != -1) {
10424 		switch (ch) {
10425 		default:
10426 			usage_info();
10427 			/* NOTREACHED */
10428 		}
10429 	}
10430 
10431 	argc -= optind;
10432 	argv += optind;
10433 
10434 #ifndef PROFILE
10435 	if (pledge("stdio rpath wpath flock proc exec sendfd unveil",
10436 	    NULL) == -1)
10437 		err(1, "pledge");
10438 #endif
10439 	cwd = getcwd(NULL, 0);
10440 	if (cwd == NULL) {
10441 		error = got_error_from_errno("getcwd");
10442 		goto done;
10443 	}
10444 
10445 	error = got_worktree_open(&worktree, cwd);
10446 	if (error) {
10447 		if (error->code == GOT_ERR_NOT_WORKTREE)
10448 			error = wrap_not_worktree_error(error, "info", cwd);
10449 		goto done;
10450 	}
10451 
10452 	error = apply_unveil(NULL, 0, got_worktree_get_root_path(worktree));
10453 	if (error)
10454 		goto done;
10455 
10456 	if (argc >= 1) {
10457 		error = get_worktree_paths_from_argv(&paths, argc, argv,
10458 		    worktree);
10459 		if (error)
10460 			goto done;
10461 		show_files = 1;
10462 	}
10463 
10464 	error = got_object_id_str(&id_str,
10465 	    got_worktree_get_base_commit_id(worktree));
10466 	if (error)
10467 		goto done;
10468 
10469 	error = got_worktree_get_uuid(&uuidstr, worktree);
10470 	if (error)
10471 		goto done;
10472 
10473 	printf("work tree: %s\n", got_worktree_get_root_path(worktree));
10474 	printf("work tree base commit: %s\n", id_str);
10475 	printf("work tree path prefix: %s\n",
10476 	    got_worktree_get_path_prefix(worktree));
10477 	printf("work tree branch reference: %s\n",
10478 	    got_worktree_get_head_ref_name(worktree));
10479 	printf("work tree UUID: %s\n", uuidstr);
10480 	printf("repository: %s\n", got_worktree_get_repo_path(worktree));
10481 
10482 	if (show_files) {
10483 		struct got_pathlist_entry *pe;
10484 		TAILQ_FOREACH(pe, &paths, entry) {
10485 			if (pe->path_len == 0)
10486 				continue;
10487 			/*
10488 			 * Assume this path will fail. This will be corrected
10489 			 * in print_path_info() in case the path does suceeed.
10490 			 */
10491 			pe->data = (void *)got_error_path(pe->path,
10492 			    GOT_ERR_BAD_PATH);
10493 		}
10494 		error = got_worktree_path_info(worktree, &paths,
10495 		    print_path_info, &paths, check_cancelled, NULL);
10496 		if (error)
10497 			goto done;
10498 		TAILQ_FOREACH(pe, &paths, entry) {
10499 			if (pe->data != NULL) {
10500 				error = pe->data; /* bad path */
10501 				break;
10502 			}
10503 		}
10504 	}
10505 done:
10506 	TAILQ_FOREACH(pe, &paths, entry)
10507 		free((char *)pe->path);
10508 	got_pathlist_free(&paths);
10509 	free(cwd);
10510 	free(id_str);
10511 	free(uuidstr);
10512 	return error;
10513 }