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Date:: Fri Sep 11 19:44:18 2020 UTC
Message:: Stop including <sys/syslimits.h> directly. POSIX says the limits defined there are available from <limits.h>, which almost all affected source files already included anyway. ok millert stsp
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1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 #include <sys/queue.h>
19 #include <sys/uio.h>
20 #include <sys/socket.h>
21 #include <sys/stat.h>
22 #include <sys/mman.h>
23 
24 #include <ctype.h>
25 #include <endian.h>
26 #include <fcntl.h>
27 #include <fnmatch.h>
28 #include <limits.h>
29 #include <dirent.h>
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <sha1.h>
33 #include <string.h>
34 #include <time.h>
35 #include <unistd.h>
36 #include <zlib.h>
37 #include <errno.h>
38 #include <libgen.h>
39 #include <stdint.h>
40 #include <imsg.h>
41 #include <uuid.h>
42 
43 #include "got_error.h"
44 #include "got_reference.h"
45 #include "got_repository.h"
46 #include "got_path.h"
47 #include "got_cancel.h"
48 #include "got_worktree.h"
49 #include "got_object.h"
50 
51 #include "got_lib_delta.h"
52 #include "got_lib_inflate.h"
53 #include "got_lib_object.h"
54 #include "got_lib_object_parse.h"
55 #include "got_lib_object_create.h"
56 #include "got_lib_pack.h"
57 #include "got_lib_privsep.h"
58 #include "got_lib_worktree.h"
59 #include "got_lib_sha1.h"
60 #include "got_lib_object_cache.h"
61 #include "got_lib_repository.h"
62 #include "got_lib_gotconfig.h"
63 
64 #ifndef nitems
65 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
66 #endif
67 
68 const char *
69 got_repo_get_path(struct got_repository *repo)
70 {
71 	return repo->path;
72 }
73 
74 const char *
75 got_repo_get_path_git_dir(struct got_repository *repo)
76 {
77 	return repo->path_git_dir;
78 }
79 
80 const char *
81 got_repo_get_gitconfig_author_name(struct got_repository *repo)
82 {
83 	return repo->gitconfig_author_name;
84 }
85 
86 const char *
87 got_repo_get_gitconfig_author_email(struct got_repository *repo)
88 {
89 	return repo->gitconfig_author_email;
90 }
91 
92 const char *
93 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
94 {
95 	return repo->global_gitconfig_author_name;
96 }
97 
98 const char *
99 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
100 {
101 	return repo->global_gitconfig_author_email;
102 }
103 
104 const char *
105 got_repo_get_gitconfig_owner(struct got_repository *repo)
106 {
107 	return repo->gitconfig_owner;
108 }
109 
110 int
111 got_repo_is_bare(struct got_repository *repo)
112 {
113 	return (strcmp(repo->path, repo->path_git_dir) == 0);
114 }
115 
116 static char *
117 get_path_git_child(struct got_repository *repo, const char *basename)
118 {
119 	char *path_child;
120 
121 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
122 	    basename) == -1)
123 		return NULL;
124 
125 	return path_child;
126 }
127 
128 char *
129 got_repo_get_path_objects(struct got_repository *repo)
130 {
131 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
132 }
133 
134 char *
135 got_repo_get_path_objects_pack(struct got_repository *repo)
136 {
137 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
138 }
139 
140 char *
141 got_repo_get_path_refs(struct got_repository *repo)
142 {
143 	return get_path_git_child(repo, GOT_REFS_DIR);
144 }
145 
146 char *
147 got_repo_get_path_packed_refs(struct got_repository *repo)
148 {
149 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
150 }
151 
152 static char *
153 get_path_head(struct got_repository *repo)
154 {
155 	return get_path_git_child(repo, GOT_HEAD_FILE);
156 }
157 
158 char *
159 got_repo_get_path_gitconfig(struct got_repository *repo)
160 {
161 	return get_path_git_child(repo, GOT_GITCONFIG);
162 }
163 
164 char *
165 got_repo_get_path_gotconfig(struct got_repository *repo)
166 {
167 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
168 }
169 
170 const struct got_gotconfig *
171 got_repo_get_gotconfig(struct got_repository *repo)
172 {
173 	return repo->gotconfig;
174 }
175 
176 void
177 got_repo_get_gitconfig_remotes(int *nremotes,
178     const struct got_remote_repo **remotes, struct got_repository *repo)
179 {
180 	*nremotes = repo->ngitconfig_remotes;
181 	*remotes = repo->gitconfig_remotes;
182 }
183 
184 static int
185 is_git_repo(struct got_repository *repo)
186 {
187 	const char *path_git = got_repo_get_path_git_dir(repo);
188 	char *path_objects = got_repo_get_path_objects(repo);
189 	char *path_refs = got_repo_get_path_refs(repo);
190 	char *path_head = get_path_head(repo);
191 	int ret = 0;
192 	struct stat sb;
193 	struct got_reference *head_ref;
194 
195 	if (lstat(path_git, &sb) == -1)
196 		goto done;
197 	if (!S_ISDIR(sb.st_mode))
198 		goto done;
199 
200 	if (lstat(path_objects, &sb) == -1)
201 		goto done;
202 	if (!S_ISDIR(sb.st_mode))
203 		goto done;
204 
205 	if (lstat(path_refs, &sb) == -1)
206 		goto done;
207 	if (!S_ISDIR(sb.st_mode))
208 		goto done;
209 
210 	if (lstat(path_head, &sb) == -1)
211 		goto done;
212 	if (!S_ISREG(sb.st_mode))
213 		goto done;
214 
215 	/* Check if the HEAD reference can be opened. */
216 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
217 		goto done;
218 	got_ref_close(head_ref);
219 
220 	ret = 1;
221 done:
222 	free(path_objects);
223 	free(path_refs);
224 	free(path_head);
225 	return ret;
226 
227 }
228 
229 const struct got_error *
230 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
231     struct got_object *obj)
232 {
233 #ifndef GOT_NO_OBJ_CACHE
234 	const struct got_error *err = NULL;
235 	err = got_object_cache_add(&repo->objcache, id, obj);
236 	if (err) {
237 		if (err->code == GOT_ERR_OBJ_EXISTS ||
238 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
239 			err = NULL;
240 		return err;
241 	}
242 	obj->refcnt++;
243 #endif
244 	return NULL;
245 }
246 
247 struct got_object *
248 got_repo_get_cached_object(struct got_repository *repo,
249     struct got_object_id *id)
250 {
251 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
252 }
253 
254 const struct got_error *
255 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
256     struct got_tree_object *tree)
257 {
258 #ifndef GOT_NO_OBJ_CACHE
259 	const struct got_error *err = NULL;
260 	err = got_object_cache_add(&repo->treecache, id, tree);
261 	if (err) {
262 		if (err->code == GOT_ERR_OBJ_EXISTS ||
263 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
264 			err = NULL;
265 		return err;
266 	}
267 	tree->refcnt++;
268 #endif
269 	return NULL;
270 }
271 
272 struct got_tree_object *
273 got_repo_get_cached_tree(struct got_repository *repo,
274     struct got_object_id *id)
275 {
276 	return (struct got_tree_object *)got_object_cache_get(
277 	    &repo->treecache, id);
278 }
279 
280 const struct got_error *
281 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
282     struct got_commit_object *commit)
283 {
284 #ifndef GOT_NO_OBJ_CACHE
285 	const struct got_error *err = NULL;
286 	err = got_object_cache_add(&repo->commitcache, id, commit);
287 	if (err) {
288 		if (err->code == GOT_ERR_OBJ_EXISTS ||
289 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
290 			err = NULL;
291 		return err;
292 	}
293 	commit->refcnt++;
294 #endif
295 	return NULL;
296 }
297 
298 struct got_commit_object *
299 got_repo_get_cached_commit(struct got_repository *repo,
300     struct got_object_id *id)
301 {
302 	return (struct got_commit_object *)got_object_cache_get(
303 	    &repo->commitcache, id);
304 }
305 
306 const struct got_error *
307 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
308     struct got_tag_object *tag)
309 {
310 #ifndef GOT_NO_OBJ_CACHE
311 	const struct got_error *err = NULL;
312 	err = got_object_cache_add(&repo->tagcache, id, tag);
313 	if (err) {
314 		if (err->code == GOT_ERR_OBJ_EXISTS ||
315 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
316 			err = NULL;
317 		return err;
318 	}
319 	tag->refcnt++;
320 #endif
321 	return NULL;
322 }
323 
324 struct got_tag_object *
325 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
326 {
327 	return (struct got_tag_object *)got_object_cache_get(
328 	    &repo->tagcache, id);
329 }
330 
331 const struct got_error *
332 open_repo(struct got_repository *repo, const char *path)
333 {
334 	const struct got_error *err = NULL;
335 
336 	/* bare git repository? */
337 	repo->path_git_dir = strdup(path);
338 	if (repo->path_git_dir == NULL)
339 		return got_error_from_errno("strdup");
340 	if (is_git_repo(repo)) {
341 		repo->path = strdup(repo->path_git_dir);
342 		if (repo->path == NULL) {
343 			err = got_error_from_errno("strdup");
344 			goto done;
345 		}
346 		return NULL;
347 	}
348 
349 	/* git repository with working tree? */
350 	free(repo->path_git_dir);
351 	repo->path_git_dir = NULL;
352 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
353 		err = got_error_from_errno("asprintf");
354 		goto done;
355 	}
356 	if (is_git_repo(repo)) {
357 		repo->path = strdup(path);
358 		if (repo->path == NULL) {
359 			err = got_error_from_errno("strdup");
360 			goto done;
361 		}
362 		return NULL;
363 	}
364 
365 	err = got_error(GOT_ERR_NOT_GIT_REPO);
366 done:
367 	if (err) {
368 		free(repo->path);
369 		repo->path = NULL;
370 		free(repo->path_git_dir);
371 		repo->path_git_dir = NULL;
372 	}
373 	return err;
374 }
375 
376 static const struct got_error *
377 parse_gitconfig_file(int *gitconfig_repository_format_version,
378     char **gitconfig_author_name, char **gitconfig_author_email,
379     struct got_remote_repo **remotes, int *nremotes,
380     char **gitconfig_owner,
381     const char *gitconfig_path)
382 {
383 	const struct got_error *err = NULL, *child_err = NULL;
384 	int fd = -1;
385 	int imsg_fds[2] = { -1, -1 };
386 	pid_t pid;
387 	struct imsgbuf *ibuf;
388 
389 	*gitconfig_repository_format_version = 0;
390 	*gitconfig_author_name = NULL;
391 	*gitconfig_author_email = NULL;
392 	if (remotes)
393 		*remotes = NULL;
394 	if (nremotes)
395 		*nremotes = 0;
396 	if (gitconfig_owner)
397 		*gitconfig_owner = NULL;
398 
399 	fd = open(gitconfig_path, O_RDONLY);
400 	if (fd == -1) {
401 		if (errno == ENOENT)
402 			return NULL;
403 		return got_error_from_errno2("open", gitconfig_path);
404 	}
405 
406 	ibuf = calloc(1, sizeof(*ibuf));
407 	if (ibuf == NULL) {
408 		err = got_error_from_errno("calloc");
409 		goto done;
410 	}
411 
412 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
413 		err = got_error_from_errno("socketpair");
414 		goto done;
415 	}
416 
417 	pid = fork();
418 	if (pid == -1) {
419 		err = got_error_from_errno("fork");
420 		goto done;
421 	} else if (pid == 0) {
422 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
423 		    gitconfig_path);
424 		/* not reached */
425 	}
426 
427 	if (close(imsg_fds[1]) == -1) {
428 		err = got_error_from_errno("close");
429 		goto done;
430 	}
431 	imsg_fds[1] = -1;
432 	imsg_init(ibuf, imsg_fds[0]);
433 
434 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
435 	if (err)
436 		goto done;
437 	fd = -1;
438 
439 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
440 	if (err)
441 		goto done;
442 
443 	err = got_privsep_recv_gitconfig_int(
444 	    gitconfig_repository_format_version, ibuf);
445 	if (err)
446 		goto done;
447 
448 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
449 	if (err)
450 		goto done;
451 
452 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
453 	if (err)
454 		goto done;
455 
456 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
457 	if (err)
458 		goto done;
459 
460 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
461 	if (err)
462 		goto done;
463 
464 	if (remotes && nremotes) {
465 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
466 		if (err)
467 			goto done;
468 
469 		err = got_privsep_recv_gitconfig_remotes(remotes,
470 		    nremotes, ibuf);
471 		if (err)
472 			goto done;
473 	}
474 
475 	if (gitconfig_owner) {
476 		err = got_privsep_send_gitconfig_owner_req(ibuf);
477 		if (err)
478 			goto done;
479 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
480 		if (err)
481 			goto done;
482 	}
483 
484 	imsg_clear(ibuf);
485 	err = got_privsep_send_stop(imsg_fds[0]);
486 	child_err = got_privsep_wait_for_child(pid);
487 	if (child_err && err == NULL)
488 		err = child_err;
489 done:
490 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
491 		err = got_error_from_errno("close");
492 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
493 		err = got_error_from_errno("close");
494 	if (fd != -1 && close(fd) == -1 && err == NULL)
495 		err = got_error_from_errno2("close", gitconfig_path);
496 	free(ibuf);
497 	return err;
498 }
499 
500 static const struct got_error *
501 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
502 {
503 	const struct got_error *err = NULL;
504 	char *repo_gitconfig_path = NULL;
505 
506 	if (global_gitconfig_path) {
507 		/* Read settings from ~/.gitconfig. */
508 		int dummy_repo_version;
509 		err = parse_gitconfig_file(&dummy_repo_version,
510 		    &repo->global_gitconfig_author_name,
511 		    &repo->global_gitconfig_author_email,
512 		    NULL, NULL, NULL, global_gitconfig_path);
513 		if (err)
514 			return err;
515 	}
516 
517 	/* Read repository's .git/config file. */
518 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
519 	if (repo_gitconfig_path == NULL)
520 		return got_error_from_errno("got_repo_get_path_gitconfig");
521 
522 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
523 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
524 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
525 	    &repo->gitconfig_owner, repo_gitconfig_path);
526 	if (err)
527 		goto done;
528 done:
529 	free(repo_gitconfig_path);
530 	return err;
531 }
532 
533 static const struct got_error *
534 read_gotconfig(struct got_repository *repo)
535 {
536 	const struct got_error *err = NULL;
537 	char *gotconfig_path;
538 
539 	gotconfig_path = got_repo_get_path_gotconfig(repo);
540 	if (gotconfig_path == NULL)
541 		return got_error_from_errno("got_repo_get_path_gotconfig");
542 
543 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
544 	free(gotconfig_path);
545 	return err;
546 }
547 
548 const struct got_error *
549 got_repo_open(struct got_repository **repop, const char *path,
550     const char *global_gitconfig_path)
551 {
552 	struct got_repository *repo = NULL;
553 	const struct got_error *err = NULL;
554 	char *abspath;
555 	int i, tried_root = 0;
556 
557 	*repop = NULL;
558 
559 	if (got_path_is_absolute(path))
560 		abspath = strdup(path);
561 	else
562 		abspath = got_path_get_absolute(path);
563 	if (abspath == NULL)
564 		return got_error_path(path, GOT_ERR_BAD_PATH);
565 
566 	repo = calloc(1, sizeof(*repo));
567 	if (repo == NULL) {
568 		err = got_error_from_errno("calloc");
569 		goto done;
570 	}
571 
572 	for (i = 0; i < nitems(repo->privsep_children); i++) {
573 		memset(&repo->privsep_children[i], 0,
574 		    sizeof(repo->privsep_children[0]));
575 		repo->privsep_children[i].imsg_fd = -1;
576 	}
577 
578 	err = got_object_cache_init(&repo->objcache,
579 	    GOT_OBJECT_CACHE_TYPE_OBJ);
580 	if (err)
581 		goto done;
582 	err = got_object_cache_init(&repo->treecache,
583 	    GOT_OBJECT_CACHE_TYPE_TREE);
584 	if (err)
585 		goto done;
586 	err = got_object_cache_init(&repo->commitcache,
587 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
588 	if (err)
589 		goto done;
590 	err = got_object_cache_init(&repo->tagcache,
591 	    GOT_OBJECT_CACHE_TYPE_TAG);
592 	if (err)
593 		goto done;
594 
595 	path = realpath(abspath, NULL);
596 	if (path == NULL) {
597 		err = got_error_from_errno2("realpath", abspath);
598 		goto done;
599 	}
600 
601 	do {
602 		err = open_repo(repo, path);
603 		if (err == NULL)
604 			break;
605 		if (err->code != GOT_ERR_NOT_GIT_REPO)
606 			break;
607 		if (path[0] == '/' && path[1] == '\0') {
608 			if (tried_root) {
609 				err = got_error(GOT_ERR_NOT_GIT_REPO);
610 				goto done;
611 			}
612 			tried_root = 1;
613 		}
614 		path = dirname(path);
615 		if (path == NULL) {
616 			err = got_error_from_errno2("dirname", path);
617 			goto done;
618 		}
619 	} while (path);
620 
621 	err = read_gotconfig(repo);
622 	if (err)
623 		goto done;
624 
625 	err = read_gitconfig(repo, global_gitconfig_path);
626 	if (err)
627 		goto done;
628 	if (repo->gitconfig_repository_format_version != 0)
629 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
630 done:
631 	if (err)
632 		got_repo_close(repo);
633 	else
634 		*repop = repo;
635 	free(abspath);
636 	return err;
637 }
638 
639 const struct got_error *
640 got_repo_close(struct got_repository *repo)
641 {
642 	const struct got_error *err = NULL, *child_err;
643 	int i;
644 
645 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
646 		if (repo->packidx_cache[i] == NULL)
647 			break;
648 		got_packidx_close(repo->packidx_cache[i]);
649 	}
650 
651 	for (i = 0; i < nitems(repo->packs); i++) {
652 		if (repo->packs[i].path_packfile == NULL)
653 			break;
654 		got_pack_close(&repo->packs[i]);
655 	}
656 
657 	free(repo->path);
658 	free(repo->path_git_dir);
659 
660 	got_object_cache_close(&repo->objcache);
661 	got_object_cache_close(&repo->treecache);
662 	got_object_cache_close(&repo->commitcache);
663 	got_object_cache_close(&repo->tagcache);
664 
665 	for (i = 0; i < nitems(repo->privsep_children); i++) {
666 		if (repo->privsep_children[i].imsg_fd == -1)
667 			continue;
668 		imsg_clear(repo->privsep_children[i].ibuf);
669 		free(repo->privsep_children[i].ibuf);
670 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
671 		child_err = got_privsep_wait_for_child(
672 		    repo->privsep_children[i].pid);
673 		if (child_err && err == NULL)
674 			err = child_err;
675 		if (close(repo->privsep_children[i].imsg_fd) != 0 &&
676 		    err == NULL)
677 			err = got_error_from_errno("close");
678 	}
679 
680 	if (repo->gotconfig)
681 		got_gotconfig_free(repo->gotconfig);
682 	free(repo->gitconfig_author_name);
683 	free(repo->gitconfig_author_email);
684 	for (i = 0; i < repo->ngitconfig_remotes; i++) {
685 		free(repo->gitconfig_remotes[i].name);
686 		free(repo->gitconfig_remotes[i].url);
687 	}
688 	free(repo->gitconfig_remotes);
689 	free(repo);
690 
691 	return err;
692 }
693 
694 const struct got_error *
695 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
696     const char *input_path, int check_disk)
697 {
698 	const struct got_error *err = NULL;
699 	const char *repo_abspath = NULL;
700 	size_t repolen, len;
701 	char *canonpath, *path = NULL;
702 
703 	*in_repo_path = NULL;
704 
705 	canonpath = strdup(input_path);
706 	if (canonpath == NULL) {
707 		err = got_error_from_errno("strdup");
708 		goto done;
709 	}
710 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
711 	if (err)
712 		goto done;
713 
714 	repo_abspath = got_repo_get_path(repo);
715 
716 	if (!check_disk || canonpath[0] == '\0') {
717 		path = strdup(canonpath);
718 		if (path == NULL) {
719 			err = got_error_from_errno("strdup");
720 			goto done;
721 		}
722 	} else {
723 		path = realpath(canonpath, NULL);
724 		if (path == NULL) {
725 			if (errno != ENOENT) {
726 				err = got_error_from_errno2("realpath",
727 				    canonpath);
728 				goto done;
729 			}
730 			/*
731 			 * Path is not on disk.
732 			 * Assume it is already relative to repository root.
733 			 */
734 			path = strdup(canonpath);
735 			if (path == NULL) {
736 				err = got_error_from_errno("strdup");
737 				goto done;
738 			}
739 		}
740 
741 		repolen = strlen(repo_abspath);
742 		len = strlen(path);
743 
744 
745 		if (strcmp(path, repo_abspath) == 0) {
746 			free(path);
747 			path = strdup("");
748 			if (path == NULL) {
749 				err = got_error_from_errno("strdup");
750 				goto done;
751 			}
752 		} else if (len > repolen &&
753 		    got_path_is_child(path, repo_abspath, repolen)) {
754 			/* Matched an on-disk path inside repository. */
755 			if (got_repo_is_bare(repo)) {
756 				/*
757 				 * Matched an on-disk path inside repository
758 				 * database. Treat as repository-relative.
759 				 */
760 			} else {
761 				char *child;
762 				/* Strip common prefix with repository path. */
763 				err = got_path_skip_common_ancestor(&child,
764 				    repo_abspath, path);
765 				if (err)
766 					goto done;
767 				free(path);
768 				path = child;
769 			}
770 		} else {
771 			/*
772 			 * Matched unrelated on-disk path.
773 			 * Treat it as repository-relative.
774 			 */
775 		}
776 	}
777 
778 	/* Make in-repository path absolute */
779 	if (path[0] != '/') {
780 		char *abspath;
781 		if (asprintf(&abspath, "/%s", path) == -1) {
782 			err = got_error_from_errno("asprintf");
783 			goto done;
784 		}
785 		free(path);
786 		path = abspath;
787 	}
788 
789 done:
790 	free(canonpath);
791 	if (err)
792 		free(path);
793 	else
794 		*in_repo_path = path;
795 	return err;
796 }
797 
798 static const struct got_error *
799 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
800     const char *path_packidx)
801 {
802 	const struct got_error *err = NULL;
803 	int i;
804 
805 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
806 		if (repo->packidx_cache[i] == NULL)
807 			break;
808 		if (strcmp(repo->packidx_cache[i]->path_packidx,
809 		    path_packidx) == 0) {
810 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
811 		}
812 	}
813 	if (i == nitems(repo->packidx_cache)) {
814 		err = got_packidx_close(repo->packidx_cache[i - 1]);
815 		if (err)
816 			return err;
817 	}
818 
819 	/*
820 	 * Insert the new pack index at the front so it will
821 	 * be searched first in the future.
822 	 */
823 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
824 	    sizeof(repo->packidx_cache) -
825 	    sizeof(repo->packidx_cache[0]));
826 	repo->packidx_cache[0] = packidx;
827 
828 	return NULL;
829 }
830 
831 static int
832 is_packidx_filename(const char *name, size_t len)
833 {
834 	if (len != GOT_PACKIDX_NAMELEN)
835 		return 0;
836 
837 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
838 		return 0;
839 
840 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
841 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
842 		return 0;
843 
844 	return 1;
845 }
846 
847 const struct got_error *
848 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
849     struct got_repository *repo, struct got_object_id *id)
850 {
851 	const struct got_error *err;
852 	char *path_packdir;
853 	DIR *packdir;
854 	struct dirent *dent;
855 	char *path_packidx;
856 	int i;
857 
858 	/* Search pack index cache. */
859 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
860 		if (repo->packidx_cache[i] == NULL)
861 			break;
862 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
863 		if (*idx != -1) {
864 			*packidx = repo->packidx_cache[i];
865 			/*
866 			 * Move this cache entry to the front. Repeatedly
867 			 * searching a wrong pack index can be expensive.
868 			 */
869 			if (i > 0) {
870 				struct got_packidx *p;
871 				p = repo->packidx_cache[0];
872 				repo->packidx_cache[0] = *packidx;
873 				repo->packidx_cache[i] = p;
874 			}
875 			return NULL;
876 		}
877 	}
878 	/* No luck. Search the filesystem. */
879 
880 	path_packdir = got_repo_get_path_objects_pack(repo);
881 	if (path_packdir == NULL)
882 		return got_error_from_errno("got_repo_get_path_objects_pack");
883 
884 	packdir = opendir(path_packdir);
885 	if (packdir == NULL) {
886 		if (errno == ENOENT)
887 			err = got_error_no_obj(id);
888 		else
889 			err = got_error_from_errno2("opendir", path_packdir);
890 		goto done;
891 	}
892 
893 	while ((dent = readdir(packdir)) != NULL) {
894 		int is_cached = 0;
895 
896 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
897 			continue;
898 
899 		if (asprintf(&path_packidx, "%s/%s", path_packdir,
900 		    dent->d_name) == -1) {
901 			err = got_error_from_errno("asprintf");
902 			goto done;
903 		}
904 
905 		for (i = 0; i < nitems(repo->packidx_cache); i++) {
906 			if (repo->packidx_cache[i] == NULL)
907 				break;
908 			if (strcmp(repo->packidx_cache[i]->path_packidx,
909 			    path_packidx) == 0) {
910 				is_cached = 1;
911 				break;
912 			}
913 		}
914 		if (is_cached) {
915 			free(path_packidx);
916 			continue; /* already searched */
917 		}
918 
919 		err = got_packidx_open(packidx, path_packidx, 0);
920 		if (err) {
921 			free(path_packidx);
922 			goto done;
923 		}
924 
925 		err = cache_packidx(repo, *packidx, path_packidx);
926 		free(path_packidx);
927 		if (err)
928 			goto done;
929 
930 		*idx = got_packidx_get_object_idx(*packidx, id);
931 		if (*idx != -1) {
932 			err = NULL; /* found the object */
933 			goto done;
934 		}
935 	}
936 
937 	err = got_error_no_obj(id);
938 done:
939 	free(path_packdir);
940 	if (packdir && closedir(packdir) != 0 && err == NULL)
941 		err = got_error_from_errno("closedir");
942 	return err;
943 }
944 
945 static const struct got_error *
946 read_packfile_hdr(int fd, struct got_packidx *packidx)
947 {
948 	const struct got_error *err = NULL;
949 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
950 	struct got_packfile_hdr hdr;
951 	ssize_t n;
952 
953 	n = read(fd, &hdr, sizeof(hdr));
954 	if (n < 0)
955 		return got_error_from_errno("read");
956 	if (n != sizeof(hdr))
957 		return got_error(GOT_ERR_BAD_PACKFILE);
958 
959 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
960 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
961 	    be32toh(hdr.nobjects) != totobj)
962 		err = got_error(GOT_ERR_BAD_PACKFILE);
963 
964 	return err;
965 }
966 
967 static const struct got_error *
968 open_packfile(int *fd, const char *path_packfile, struct got_packidx *packidx)
969 {
970 	const struct got_error *err = NULL;
971 
972 	*fd = open(path_packfile, O_RDONLY | O_NOFOLLOW);
973 	if (*fd == -1)
974 		return got_error_from_errno2("open", path_packfile);
975 
976 	if (packidx) {
977 		err = read_packfile_hdr(*fd, packidx);
978 		if (err) {
979 			close(*fd);
980 			*fd = -1;
981 		}
982 	}
983 
984 	return err;
985 }
986 
987 const struct got_error *
988 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
989     const char *path_packfile, struct got_packidx *packidx)
990 {
991 	const struct got_error *err = NULL;
992 	struct got_pack *pack = NULL;
993 	struct stat sb;
994 	int i;
995 
996 	if (packp)
997 		*packp = NULL;
998 
999 	for (i = 0; i < nitems(repo->packs); i++) {
1000 		pack = &repo->packs[i];
1001 		if (pack->path_packfile == NULL)
1002 			break;
1003 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1004 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1005 	}
1006 
1007 	if (i == nitems(repo->packs) - 1) {
1008 		err = got_pack_close(&repo->packs[i - 1]);
1009 		if (err)
1010 			return err;
1011 		memmove(&repo->packs[1], &repo->packs[0],
1012 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1013 		i = 0;
1014 	}
1015 
1016 	pack = &repo->packs[i];
1017 
1018 	pack->path_packfile = strdup(path_packfile);
1019 	if (pack->path_packfile == NULL) {
1020 		err = got_error_from_errno("strdup");
1021 		goto done;
1022 	}
1023 
1024 	err = open_packfile(&pack->fd, path_packfile, packidx);
1025 	if (err)
1026 		goto done;
1027 
1028 	if (fstat(pack->fd, &sb) != 0) {
1029 		err = got_error_from_errno("fstat");
1030 		goto done;
1031 	}
1032 	pack->filesize = sb.st_size;
1033 
1034 	pack->privsep_child = NULL;
1035 
1036 #ifndef GOT_PACK_NO_MMAP
1037 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1038 	    pack->fd, 0);
1039 	if (pack->map == MAP_FAILED) {
1040 		if (errno != ENOMEM) {
1041 			err = got_error_from_errno("mmap");
1042 			goto done;
1043 		}
1044 		pack->map = NULL; /* fall back to read(2) */
1045 	}
1046 #endif
1047 done:
1048 	if (err) {
1049 		if (pack) {
1050 			free(pack->path_packfile);
1051 			memset(pack, 0, sizeof(*pack));
1052 		}
1053 	} else if (packp)
1054 		*packp = pack;
1055 	return err;
1056 }
1057 
1058 struct got_pack *
1059 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1060 {
1061 	struct got_pack *pack = NULL;
1062 	int i;
1063 
1064 	for (i = 0; i < nitems(repo->packs); i++) {
1065 		pack = &repo->packs[i];
1066 		if (pack->path_packfile == NULL)
1067 			break;
1068 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1069 			return pack;
1070 	}
1071 
1072 	return NULL;
1073 }
1074 
1075 const struct got_error *
1076 got_repo_init(const char *repo_path)
1077 {
1078 	const struct got_error *err = NULL;
1079 	const char *dirnames[] = {
1080 		GOT_OBJECTS_DIR,
1081 		GOT_OBJECTS_PACK_DIR,
1082 		GOT_REFS_DIR,
1083 	};
1084 	const char *description_str = "Unnamed repository; "
1085 	    "edit this file 'description' to name the repository.";
1086 	const char *headref_str = "ref: refs/heads/main";
1087 	const char *gitconfig_str = "[core]\n"
1088 	    "\trepositoryformatversion = 0\n"
1089 	    "\tfilemode = true\n"
1090 	    "\tbare = true\n";
1091 	char *path;
1092 	int i;
1093 
1094 	if (!got_path_dir_is_empty(repo_path))
1095 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1096 
1097 	for (i = 0; i < nitems(dirnames); i++) {
1098 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1099 			return got_error_from_errno("asprintf");
1100 		}
1101 		err = got_path_mkdir(path);
1102 		free(path);
1103 		if (err)
1104 			return err;
1105 	}
1106 
1107 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1108 		return got_error_from_errno("asprintf");
1109 	err = got_path_create_file(path, description_str);
1110 	free(path);
1111 	if (err)
1112 		return err;
1113 
1114 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1115 		return got_error_from_errno("asprintf");
1116 	err = got_path_create_file(path, headref_str);
1117 	free(path);
1118 	if (err)
1119 		return err;
1120 
1121 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1122 		return got_error_from_errno("asprintf");
1123 	err = got_path_create_file(path, gitconfig_str);
1124 	free(path);
1125 	if (err)
1126 		return err;
1127 
1128 	return NULL;
1129 }
1130 
1131 static const struct got_error *
1132 match_packed_object(struct got_object_id **unique_id,
1133     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1134 {
1135 	const struct got_error *err = NULL;
1136 	char *path_packdir;
1137 	DIR *packdir;
1138 	struct dirent *dent;
1139 	char *path_packidx;
1140 	struct got_object_id_queue matched_ids;
1141 
1142 	SIMPLEQ_INIT(&matched_ids);
1143 
1144 	path_packdir = got_repo_get_path_objects_pack(repo);
1145 	if (path_packdir == NULL)
1146 		return got_error_from_errno("got_repo_get_path_objects_pack");
1147 
1148 	packdir = opendir(path_packdir);
1149 	if (packdir == NULL) {
1150 		if (errno != ENOENT)
1151 			err = got_error_from_errno2("opendir", path_packdir);
1152 		goto done;
1153 	}
1154 
1155 	while ((dent = readdir(packdir)) != NULL) {
1156 		struct got_packidx *packidx;
1157 		struct got_object_qid *qid;
1158 
1159 
1160 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1161 			continue;
1162 
1163 		if (asprintf(&path_packidx, "%s/%s", path_packdir,
1164 		    dent->d_name) == -1) {
1165 			err = got_error_from_errno("asprintf");
1166 			break;
1167 		}
1168 
1169 		err = got_packidx_open(&packidx, path_packidx, 0);
1170 		free(path_packidx);
1171 		if (err)
1172 			break;
1173 
1174 		err = got_packidx_match_id_str_prefix(&matched_ids,
1175 		    packidx, id_str_prefix);
1176 		if (err) {
1177 			got_packidx_close(packidx);
1178 			break;
1179 		}
1180 		err = got_packidx_close(packidx);
1181 		if (err)
1182 			break;
1183 
1184 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1185 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1186 				int matched_type;
1187 				err = got_object_get_type(&matched_type, repo,
1188 				    qid->id);
1189 				if (err)
1190 					goto done;
1191 				if (matched_type != obj_type)
1192 					continue;
1193 			}
1194 			if (*unique_id == NULL) {
1195 				*unique_id = got_object_id_dup(qid->id);
1196 				if (*unique_id == NULL) {
1197 					err = got_error_from_errno("malloc");
1198 					goto done;
1199 				}
1200 			} else {
1201 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1202 					continue; /* packed multiple times */
1203 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1204 				goto done;
1205 			}
1206 		}
1207 	}
1208 done:
1209 	got_object_id_queue_free(&matched_ids);
1210 	free(path_packdir);
1211 	if (packdir && closedir(packdir) != 0 && err == NULL)
1212 		err = got_error_from_errno("closedir");
1213 	if (err) {
1214 		free(*unique_id);
1215 		*unique_id = NULL;
1216 	}
1217 	return err;
1218 }
1219 
1220 static const struct got_error *
1221 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1222     const char *object_dir, const char *id_str_prefix, int obj_type,
1223     struct got_repository *repo)
1224 {
1225 	const struct got_error *err = NULL;
1226 	char *path;
1227 	DIR *dir = NULL;
1228 	struct dirent *dent;
1229 	struct got_object_id id;
1230 
1231 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1232 		err = got_error_from_errno("asprintf");
1233 		goto done;
1234 	}
1235 
1236 	dir = opendir(path);
1237 	if (dir == NULL) {
1238 		if (errno == ENOENT) {
1239 			err = NULL;
1240 			goto done;
1241 		}
1242 		err = got_error_from_errno2("opendir", path);
1243 		goto done;
1244 	}
1245 	while ((dent = readdir(dir)) != NULL) {
1246 		char *id_str;
1247 		int cmp;
1248 
1249 		if (strcmp(dent->d_name, ".") == 0 ||
1250 		    strcmp(dent->d_name, "..") == 0)
1251 			continue;
1252 
1253 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1254 			err = got_error_from_errno("asprintf");
1255 			goto done;
1256 		}
1257 
1258 		if (!got_parse_sha1_digest(id.sha1, id_str))
1259 			continue;
1260 
1261 		/*
1262 		 * Directory entries do not necessarily appear in
1263 		 * sorted order, so we must iterate over all of them.
1264 		 */
1265 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1266 		if (cmp != 0) {
1267 			free(id_str);
1268 			continue;
1269 		}
1270 
1271 		if (*unique_id == NULL) {
1272 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1273 				int matched_type;
1274 				err = got_object_get_type(&matched_type, repo,
1275 				    &id);
1276 				if (err)
1277 					goto done;
1278 				if (matched_type != obj_type)
1279 					continue;
1280 			}
1281 			*unique_id = got_object_id_dup(&id);
1282 			if (*unique_id == NULL) {
1283 				err = got_error_from_errno("got_object_id_dup");
1284 				free(id_str);
1285 				goto done;
1286 			}
1287 		} else {
1288 			if (got_object_id_cmp(*unique_id, &id) == 0)
1289 				continue; /* both packed and loose */
1290 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1291 			free(id_str);
1292 			goto done;
1293 		}
1294 	}
1295 done:
1296 	if (dir && closedir(dir) != 0 && err == NULL)
1297 		err = got_error_from_errno("closedir");
1298 	if (err) {
1299 		free(*unique_id);
1300 		*unique_id = NULL;
1301 	}
1302 	free(path);
1303 	return err;
1304 }
1305 
1306 const struct got_error *
1307 got_repo_match_object_id_prefix(struct got_object_id **id,
1308     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1309 {
1310 	const struct got_error *err = NULL;
1311 	char *path_objects = got_repo_get_path_objects(repo);
1312 	char *object_dir = NULL;
1313 	size_t len;
1314 	int i;
1315 
1316 	*id = NULL;
1317 
1318 	for (i = 0; i < strlen(id_str_prefix); i++) {
1319 		if (isxdigit((unsigned char)id_str_prefix[i]))
1320 			continue;
1321 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1322 	}
1323 
1324 	len = strlen(id_str_prefix);
1325 	if (len >= 2) {
1326 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1327 		if (err)
1328 			goto done;
1329 		object_dir = strndup(id_str_prefix, 2);
1330 		if (object_dir == NULL) {
1331 			err = got_error_from_errno("strdup");
1332 			goto done;
1333 		}
1334 		err = match_loose_object(id, path_objects, object_dir,
1335 		    id_str_prefix, obj_type, repo);
1336 	} else if (len == 1) {
1337 		int i;
1338 		for (i = 0; i < 0xf; i++) {
1339 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1340 			    == -1) {
1341 				err = got_error_from_errno("asprintf");
1342 				goto done;
1343 			}
1344 			err = match_packed_object(id, repo, object_dir,
1345 			    obj_type);
1346 			if (err)
1347 				goto done;
1348 			err = match_loose_object(id, path_objects, object_dir,
1349 			    id_str_prefix, obj_type, repo);
1350 			if (err)
1351 				goto done;
1352 		}
1353 	} else {
1354 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1355 		goto done;
1356 	}
1357 done:
1358 	free(object_dir);
1359 	if (err) {
1360 		free(*id);
1361 		*id = NULL;
1362 	} else if (*id == NULL)
1363 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1364 
1365 	return err;
1366 }
1367 
1368 const struct got_error *
1369 got_repo_match_object_id(struct got_object_id **id, char **label,
1370     const char *id_str, int obj_type, int resolve_tags,
1371     struct got_repository *repo)
1372 {
1373 	const struct got_error *err;
1374 	struct got_tag_object *tag;
1375 	struct got_reference *ref = NULL;
1376 
1377 	*id = NULL;
1378 	if (label)
1379 		*label = NULL;
1380 
1381 	if (resolve_tags) {
1382 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1383 		    repo);
1384 		if (err == NULL) {
1385 			*id = got_object_id_dup(
1386 			    got_object_tag_get_object_id(tag));
1387 			if (*id == NULL)
1388 				err = got_error_from_errno("got_object_id_dup");
1389 			else if (label && asprintf(label, "refs/tags/%s",
1390 			    got_object_tag_get_name(tag)) == -1) {
1391 				err = got_error_from_errno("asprintf");
1392 				free(*id);
1393 				*id = NULL;
1394 			}
1395 			got_object_tag_close(tag);
1396 			return err;
1397 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1398 		    err->code != GOT_ERR_NO_OBJ)
1399 			return err;
1400 	}
1401 
1402 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1403 	if (err) {
1404 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1405 			return err;
1406 		err = got_ref_open(&ref, repo, id_str, 0);
1407 		if (err != NULL)
1408 			goto done;
1409 		if (label) {
1410 			*label = strdup(got_ref_get_name(ref));
1411 			if (*label == NULL) {
1412 				err = got_error_from_errno("strdup");
1413 				goto done;
1414 			}
1415 		}
1416 		err = got_ref_resolve(id, repo, ref);
1417 	} else if (label) {
1418 		err = got_object_id_str(label, *id);
1419 		if (*label == NULL) {
1420 			err = got_error_from_errno("strdup");
1421 			goto done;
1422 		}
1423 	}
1424 done:
1425 	if (ref)
1426 		got_ref_close(ref);
1427 	return err;
1428 }
1429 
1430 const struct got_error *
1431 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1432     int obj_type, struct got_repository *repo)
1433 {
1434 	const struct got_error *err;
1435 	struct got_reflist_head refs;
1436 	struct got_reflist_entry *re;
1437 	struct got_object_id *tag_id;
1438 
1439 	SIMPLEQ_INIT(&refs);
1440 	*tag = NULL;
1441 
1442 	err = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_by_name, NULL);
1443 	if (err)
1444 		return err;
1445 
1446 	SIMPLEQ_FOREACH(re, &refs, entry) {
1447 		const char *refname;
1448 		refname = got_ref_get_name(re->ref);
1449 		if (got_ref_is_symbolic(re->ref))
1450 			continue;
1451 		refname += strlen("refs/tags/");
1452 		if (strcmp(refname, name) != 0)
1453 			continue;
1454 		err = got_ref_resolve(&tag_id, repo, re->ref);
1455 		if (err)
1456 			break;
1457 		err = got_object_open_as_tag(tag, repo, tag_id);
1458 		free(tag_id);
1459 		if (err)
1460 			break;
1461 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1462 		    got_object_tag_get_object_type(*tag) == obj_type)
1463 			break;
1464 		got_object_tag_close(*tag);
1465 		*tag = NULL;
1466 	}
1467 
1468 	got_ref_list_free(&refs);
1469 	if (err == NULL && *tag == NULL)
1470 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1471 	return err;
1472 }
1473 
1474 static const struct got_error *
1475 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1476     const char *name, mode_t mode, struct got_object_id *blob_id)
1477 {
1478 	const struct got_error *err = NULL;
1479 
1480 	 *new_te = NULL;
1481 
1482 	*new_te = calloc(1, sizeof(**new_te));
1483 	if (*new_te == NULL)
1484 		return got_error_from_errno("calloc");
1485 
1486 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1487 	    sizeof((*new_te)->name)) {
1488 		err = got_error(GOT_ERR_NO_SPACE);
1489 		goto done;
1490 	}
1491 
1492 	if (S_ISLNK(mode)) {
1493 		(*new_te)->mode = S_IFLNK;
1494 	} else {
1495 		(*new_te)->mode = S_IFREG;
1496 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1497 	}
1498 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1499 done:
1500 	if (err && *new_te) {
1501 		free(*new_te);
1502 		*new_te = NULL;
1503 	}
1504 	return err;
1505 }
1506 
1507 static const struct got_error *
1508 import_file(struct got_tree_entry **new_te, struct dirent *de,
1509     const char *path, struct got_repository *repo)
1510 {
1511 	const struct got_error *err;
1512 	struct got_object_id *blob_id = NULL;
1513 	char *filepath;
1514 	struct stat sb;
1515 
1516 	if (asprintf(&filepath, "%s%s%s", path,
1517 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1518 		return got_error_from_errno("asprintf");
1519 
1520 	if (lstat(filepath, &sb) != 0) {
1521 		err = got_error_from_errno2("lstat", path);
1522 		goto done;
1523 	}
1524 
1525 	err = got_object_blob_create(&blob_id, filepath, repo);
1526 	if (err)
1527 		goto done;
1528 
1529 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1530 	    blob_id);
1531 done:
1532 	free(filepath);
1533 	if (err)
1534 		free(blob_id);
1535 	return err;
1536 }
1537 
1538 static const struct got_error *
1539 insert_tree_entry(struct got_tree_entry *new_te,
1540     struct got_pathlist_head *paths)
1541 {
1542 	const struct got_error *err = NULL;
1543 	struct got_pathlist_entry *new_pe;
1544 
1545 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1546 	if (err)
1547 		return err;
1548 	if (new_pe == NULL)
1549 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1550 	return NULL;
1551 }
1552 
1553 static const struct got_error *write_tree(struct got_object_id **,
1554     const char *, struct got_pathlist_head *, struct got_repository *,
1555     got_repo_import_cb progress_cb, void *progress_arg);
1556 
1557 static const struct got_error *
1558 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1559     const char *path, struct got_pathlist_head *ignores,
1560     struct got_repository *repo,
1561     got_repo_import_cb progress_cb, void *progress_arg)
1562 {
1563 	const struct got_error *err;
1564 	struct got_object_id *id = NULL;
1565 	char *subdirpath;
1566 
1567 	if (asprintf(&subdirpath, "%s%s%s", path,
1568 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1569 		return got_error_from_errno("asprintf");
1570 
1571 	(*new_te) = calloc(1, sizeof(**new_te));
1572 	if (*new_te == NULL)
1573 		return got_error_from_errno("calloc");
1574 	(*new_te)->mode = S_IFDIR;
1575 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1576 	    sizeof((*new_te)->name)) {
1577 		err = got_error(GOT_ERR_NO_SPACE);
1578 		goto done;
1579 	}
1580 	err = write_tree(&id, subdirpath, ignores,  repo,
1581 	    progress_cb, progress_arg);
1582 	if (err)
1583 		goto done;
1584 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1585 	
1586 done:
1587 	free(id);
1588 	free(subdirpath);
1589 	if (err) {
1590 		free(*new_te);
1591 		*new_te = NULL;
1592 	}
1593 	return err;
1594 }
1595 
1596 static const struct got_error *
1597 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1598     struct got_pathlist_head *ignores, struct got_repository *repo,
1599     got_repo_import_cb progress_cb, void *progress_arg)
1600 {
1601 	const struct got_error *err = NULL;
1602 	DIR *dir;
1603 	struct dirent *de;
1604 	int nentries;
1605 	struct got_tree_entry *new_te = NULL;
1606 	struct got_pathlist_head paths;
1607 	struct got_pathlist_entry *pe;
1608 
1609 	*new_tree_id = NULL;
1610 
1611 	TAILQ_INIT(&paths);
1612 
1613 	dir = opendir(path_dir);
1614 	if (dir == NULL) {
1615 		err = got_error_from_errno2("opendir", path_dir);
1616 		goto done;
1617 	}
1618 
1619 	nentries = 0;
1620 	while ((de = readdir(dir)) != NULL) {
1621 		int ignore = 0;
1622 		int type;
1623 
1624 		if (strcmp(de->d_name, ".") == 0 ||
1625 		    strcmp(de->d_name, "..") == 0)
1626 			continue;
1627 
1628 		TAILQ_FOREACH(pe, ignores, entry) {
1629 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1630 				ignore = 1;
1631 				break;
1632 			}
1633 		}
1634 		if (ignore)
1635 			continue;
1636 
1637 		err = got_path_dirent_type(&type, path_dir, de);
1638 		if (err)
1639 			goto done;
1640 
1641 		if (type == DT_DIR) {
1642 			err = import_subdir(&new_te, de, path_dir,
1643 			    ignores, repo, progress_cb, progress_arg);
1644 			if (err) {
1645 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1646 					goto done;
1647 				err = NULL;
1648 				continue;
1649 			}
1650 		} else if (type == DT_REG || type == DT_LNK) {
1651 			err = import_file(&new_te, de, path_dir, repo);
1652 			if (err)
1653 				goto done;
1654 		} else
1655 			continue;
1656 
1657 		err = insert_tree_entry(new_te, &paths);
1658 		if (err)
1659 			goto done;
1660 		nentries++;
1661 	}
1662 
1663 	if (TAILQ_EMPTY(&paths)) {
1664 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1665 		    "cannot create tree without any entries");
1666 		goto done;
1667 	}
1668 
1669 	TAILQ_FOREACH(pe, &paths, entry) {
1670 		struct got_tree_entry *te = pe->data;
1671 		char *path;
1672 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1673 			continue;
1674 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1675 			err = got_error_from_errno("asprintf");
1676 			goto done;
1677 		}
1678 		err = (*progress_cb)(progress_arg, path);
1679 		free(path);
1680 		if (err)
1681 			goto done;
1682 	}
1683 
1684 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1685 done:
1686 	if (dir)
1687 		closedir(dir);
1688 	got_pathlist_free(&paths);
1689 	return err;
1690 }
1691 
1692 const struct got_error *
1693 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1694     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1695     struct got_repository *repo, got_repo_import_cb progress_cb,
1696     void *progress_arg)
1697 {
1698 	const struct got_error *err;
1699 	struct got_object_id *new_tree_id;
1700 
1701 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1702 	    progress_cb, progress_arg);
1703 	if (err)
1704 		return err;
1705 
1706 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1707 	    author, time(NULL), author, time(NULL), logmsg, repo);
1708 	free(new_tree_id);
1709 	return err;
1710 }