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/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
24 #include <curses.h>
25 #include <panel.h>
26 #include <locale.h>
27 #include <sha1.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <getopt.h>
33 #include <string.h>
34 #include <err.h>
35 #include <unistd.h>
36 #include <limits.h>
37 #include <wchar.h>
38 #include <time.h>
39 #include <pthread.h>
40 #include <libgen.h>
41 #include <regex.h>
42 #include <sched.h>
43 
44 #include "got_version.h"
45 #include "got_error.h"
46 #include "got_object.h"
47 #include "got_reference.h"
48 #include "got_repository.h"
49 #include "got_diff.h"
50 #include "got_opentemp.h"
51 #include "got_utf8.h"
52 #include "got_cancel.h"
53 #include "got_commit_graph.h"
54 #include "got_blame.h"
55 #include "got_privsep.h"
56 #include "got_path.h"
57 #include "got_worktree.h"
58 
59 #ifndef MIN
60 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
61 #endif
62 
63 #ifndef MAX
64 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
65 #endif
66 
67 #define CTRL(x)		((x) & 0x1f)
68 
69 #ifndef nitems
70 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
71 #endif
72 
73 struct tog_cmd {
74 	const char *name;
75 	const struct got_error *(*cmd_main)(int, char *[]);
76 	void (*cmd_usage)(void);
77 };
78 
79 __dead static void	usage(int, int);
80 __dead static void	usage_log(void);
81 __dead static void	usage_diff(void);
82 __dead static void	usage_blame(void);
83 __dead static void	usage_tree(void);
84 __dead static void	usage_ref(void);
85 
86 static const struct got_error*	cmd_log(int, char *[]);
87 static const struct got_error*	cmd_diff(int, char *[]);
88 static const struct got_error*	cmd_blame(int, char *[]);
89 static const struct got_error*	cmd_tree(int, char *[]);
90 static const struct got_error*	cmd_ref(int, char *[]);
91 
92 static const struct tog_cmd tog_commands[] = {
93 	{ "log",	cmd_log,	usage_log },
94 	{ "diff",	cmd_diff,	usage_diff },
95 	{ "blame",	cmd_blame,	usage_blame },
96 	{ "tree",	cmd_tree,	usage_tree },
97 	{ "ref",	cmd_ref,	usage_ref },
98 };
99 
100 enum tog_view_type {
101 	TOG_VIEW_DIFF,
102 	TOG_VIEW_LOG,
103 	TOG_VIEW_BLAME,
104 	TOG_VIEW_TREE,
105 	TOG_VIEW_REF,
106 };
107 
108 #define TOG_EOF_STRING	"(END)"
109 
110 struct commit_queue_entry {
111 	TAILQ_ENTRY(commit_queue_entry) entry;
112 	struct got_object_id *id;
113 	struct got_commit_object *commit;
114 	int idx;
115 };
116 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
117 struct commit_queue {
118 	int ncommits;
119 	struct commit_queue_head head;
120 };
121 
122 struct tog_color {
123 	STAILQ_ENTRY(tog_color) entry;
124 	regex_t regex;
125 	short colorpair;
126 };
127 STAILQ_HEAD(tog_colors, tog_color);
128 
129 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
130 static struct got_reflist_object_id_map *tog_refs_idmap;
131 
132 static const struct got_error *
133 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
134     struct got_reference* re2)
135 {
136 	const char *name1 = got_ref_get_name(re1);
137 	const char *name2 = got_ref_get_name(re2);
138 	int isbackup1, isbackup2;
139 
140 	/* Sort backup refs towards the bottom of the list. */
141 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
142 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
143 	if (!isbackup1 && isbackup2) {
144 		*cmp = -1;
145 		return NULL;
146 	} else if (isbackup1 && !isbackup2) {
147 		*cmp = 1;
148 		return NULL;
149 	}
150 
151 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
152 	return NULL;
153 }
154 
155 static const struct got_error *
156 tog_load_refs(struct got_repository *repo, int sort_by_date)
157 {
158 	const struct got_error *err;
159 
160 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
161 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
162 	    repo);
163 	if (err)
164 		return err;
165 
166 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
167 	    repo);
168 }
169 
170 static void
171 tog_free_refs(void)
172 {
173 	if (tog_refs_idmap) {
174 		got_reflist_object_id_map_free(tog_refs_idmap);
175 		tog_refs_idmap = NULL;
176 	}
177 	got_ref_list_free(&tog_refs);
178 }
179 
180 static const struct got_error *
181 add_color(struct tog_colors *colors, const char *pattern,
182     int idx, short color)
183 {
184 	const struct got_error *err = NULL;
185 	struct tog_color *tc;
186 	int regerr = 0;
187 
188 	if (idx < 1 || idx > COLOR_PAIRS - 1)
189 		return NULL;
190 
191 	init_pair(idx, color, -1);
192 
193 	tc = calloc(1, sizeof(*tc));
194 	if (tc == NULL)
195 		return got_error_from_errno("calloc");
196 	regerr = regcomp(&tc->regex, pattern,
197 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
198 	if (regerr) {
199 		static char regerr_msg[512];
200 		static char err_msg[512];
201 		regerror(regerr, &tc->regex, regerr_msg,
202 		    sizeof(regerr_msg));
203 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
204 		    regerr_msg);
205 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
206 		free(tc);
207 		return err;
208 	}
209 	tc->colorpair = idx;
210 	STAILQ_INSERT_HEAD(colors, tc, entry);
211 	return NULL;
212 }
213 
214 static void
215 free_colors(struct tog_colors *colors)
216 {
217 	struct tog_color *tc;
218 
219 	while (!STAILQ_EMPTY(colors)) {
220 		tc = STAILQ_FIRST(colors);
221 		STAILQ_REMOVE_HEAD(colors, entry);
222 		regfree(&tc->regex);
223 		free(tc);
224 	}
225 }
226 
227 struct tog_color *
228 get_color(struct tog_colors *colors, int colorpair)
229 {
230 	struct tog_color *tc = NULL;
231 
232 	STAILQ_FOREACH(tc, colors, entry) {
233 		if (tc->colorpair == colorpair)
234 			return tc;
235 	}
236 
237 	return NULL;
238 }
239 
240 static int
241 default_color_value(const char *envvar)
242 {
243 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
244 		return COLOR_MAGENTA;
245 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
246 		return COLOR_CYAN;
247 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
248 		return COLOR_YELLOW;
249 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
250 		return COLOR_GREEN;
251 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
252 		return COLOR_MAGENTA;
253 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
254 		return COLOR_MAGENTA;
255 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
256 		return COLOR_CYAN;
257 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
258 		return COLOR_GREEN;
259 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
260 		return COLOR_GREEN;
261 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
262 		return COLOR_CYAN;
263 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
264 		return COLOR_YELLOW;
265 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
266 		return COLOR_GREEN;
267 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
268 		return COLOR_MAGENTA;
269 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
270 		return COLOR_YELLOW;
271 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
272 		return COLOR_CYAN;
273 
274 	return -1;
275 }
276 
277 static int
278 get_color_value(const char *envvar)
279 {
280 	const char *val = getenv(envvar);
281 
282 	if (val == NULL)
283 		return default_color_value(envvar);
284 
285 	if (strcasecmp(val, "black") == 0)
286 		return COLOR_BLACK;
287 	if (strcasecmp(val, "red") == 0)
288 		return COLOR_RED;
289 	if (strcasecmp(val, "green") == 0)
290 		return COLOR_GREEN;
291 	if (strcasecmp(val, "yellow") == 0)
292 		return COLOR_YELLOW;
293 	if (strcasecmp(val, "blue") == 0)
294 		return COLOR_BLUE;
295 	if (strcasecmp(val, "magenta") == 0)
296 		return COLOR_MAGENTA;
297 	if (strcasecmp(val, "cyan") == 0)
298 		return COLOR_CYAN;
299 	if (strcasecmp(val, "white") == 0)
300 		return COLOR_WHITE;
301 	if (strcasecmp(val, "default") == 0)
302 		return -1;
303 
304 	return default_color_value(envvar);
305 }
306 
307 
308 struct tog_diff_view_state {
309 	struct got_object_id *id1, *id2;
310 	const char *label1, *label2;
311 	FILE *f, *f1, *f2;
312 	int first_displayed_line;
313 	int last_displayed_line;
314 	int eof;
315 	int diff_context;
316 	int ignore_whitespace;
317 	int force_text_diff;
318 	struct got_repository *repo;
319 	struct tog_colors colors;
320 	size_t nlines;
321 	off_t *line_offsets;
322 	int matched_line;
323 	int selected_line;
324 
325 	/* passed from log view; may be NULL */
326 	struct tog_view *log_view;
327 };
328 
329 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
330 
331 struct tog_log_thread_args {
332 	pthread_cond_t need_commits;
333 	pthread_cond_t commit_loaded;
334 	int commits_needed;
335 	int load_all;
336 	struct got_commit_graph *graph;
337 	struct commit_queue *commits;
338 	const char *in_repo_path;
339 	struct got_object_id *start_id;
340 	struct got_repository *repo;
341 	int *pack_fds;
342 	int log_complete;
343 	sig_atomic_t *quit;
344 	struct commit_queue_entry **first_displayed_entry;
345 	struct commit_queue_entry **selected_entry;
346 	int *searching;
347 	int *search_next_done;
348 	regex_t *regex;
349 };
350 
351 struct tog_log_view_state {
352 	struct commit_queue commits;
353 	struct commit_queue_entry *first_displayed_entry;
354 	struct commit_queue_entry *last_displayed_entry;
355 	struct commit_queue_entry *selected_entry;
356 	int selected;
357 	char *in_repo_path;
358 	char *head_ref_name;
359 	int log_branches;
360 	struct got_repository *repo;
361 	struct got_object_id *start_id;
362 	sig_atomic_t quit;
363 	pthread_t thread;
364 	struct tog_log_thread_args thread_args;
365 	struct commit_queue_entry *matched_entry;
366 	struct commit_queue_entry *search_entry;
367 	struct tog_colors colors;
368 };
369 
370 #define TOG_COLOR_DIFF_MINUS		1
371 #define TOG_COLOR_DIFF_PLUS		2
372 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
373 #define TOG_COLOR_DIFF_META		4
374 #define TOG_COLOR_TREE_SUBMODULE	5
375 #define TOG_COLOR_TREE_SYMLINK		6
376 #define TOG_COLOR_TREE_DIRECTORY	7
377 #define TOG_COLOR_TREE_EXECUTABLE	8
378 #define TOG_COLOR_COMMIT		9
379 #define TOG_COLOR_AUTHOR		10
380 #define TOG_COLOR_DATE			11
381 #define TOG_COLOR_REFS_HEADS		12
382 #define TOG_COLOR_REFS_TAGS		13
383 #define TOG_COLOR_REFS_REMOTES		14
384 #define TOG_COLOR_REFS_BACKUP		15
385 
386 struct tog_blame_cb_args {
387 	struct tog_blame_line *lines; /* one per line */
388 	int nlines;
389 
390 	struct tog_view *view;
391 	struct got_object_id *commit_id;
392 	int *quit;
393 };
394 
395 struct tog_blame_thread_args {
396 	const char *path;
397 	struct got_repository *repo;
398 	struct tog_blame_cb_args *cb_args;
399 	int *complete;
400 	got_cancel_cb cancel_cb;
401 	void *cancel_arg;
402 };
403 
404 struct tog_blame {
405 	FILE *f;
406 	off_t filesize;
407 	struct tog_blame_line *lines;
408 	int nlines;
409 	off_t *line_offsets;
410 	pthread_t thread;
411 	struct tog_blame_thread_args thread_args;
412 	struct tog_blame_cb_args cb_args;
413 	const char *path;
414 	int *pack_fds;
415 };
416 
417 struct tog_blame_view_state {
418 	int first_displayed_line;
419 	int last_displayed_line;
420 	int selected_line;
421 	int blame_complete;
422 	int eof;
423 	int done;
424 	struct got_object_id_queue blamed_commits;
425 	struct got_object_qid *blamed_commit;
426 	char *path;
427 	struct got_repository *repo;
428 	struct got_object_id *commit_id;
429 	struct tog_blame blame;
430 	int matched_line;
431 	struct tog_colors colors;
432 };
433 
434 struct tog_parent_tree {
435 	TAILQ_ENTRY(tog_parent_tree) entry;
436 	struct got_tree_object *tree;
437 	struct got_tree_entry *first_displayed_entry;
438 	struct got_tree_entry *selected_entry;
439 	int selected;
440 };
441 
442 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
443 
444 struct tog_tree_view_state {
445 	char *tree_label;
446 	struct got_object_id *commit_id;/* commit which this tree belongs to */
447 	struct got_tree_object *root;	/* the commit's root tree entry */
448 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
449 	struct got_tree_entry *first_displayed_entry;
450 	struct got_tree_entry *last_displayed_entry;
451 	struct got_tree_entry *selected_entry;
452 	int ndisplayed, selected, show_ids;
453 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
454 	char *head_ref_name;
455 	struct got_repository *repo;
456 	struct got_tree_entry *matched_entry;
457 	struct tog_colors colors;
458 };
459 
460 struct tog_reflist_entry {
461 	TAILQ_ENTRY(tog_reflist_entry) entry;
462 	struct got_reference *ref;
463 	int idx;
464 };
465 
466 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
467 
468 struct tog_ref_view_state {
469 	struct tog_reflist_head refs;
470 	struct tog_reflist_entry *first_displayed_entry;
471 	struct tog_reflist_entry *last_displayed_entry;
472 	struct tog_reflist_entry *selected_entry;
473 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
474 	struct got_repository *repo;
475 	struct tog_reflist_entry *matched_entry;
476 	struct tog_colors colors;
477 };
478 
479 /*
480  * We implement two types of views: parent views and child views.
481  *
482  * The 'Tab' key switches focus between a parent view and its child view.
483  * Child views are shown side-by-side to their parent view, provided
484  * there is enough screen estate.
485  *
486  * When a new view is opened from within a parent view, this new view
487  * becomes a child view of the parent view, replacing any existing child.
488  *
489  * When a new view is opened from within a child view, this new view
490  * becomes a parent view which will obscure the views below until the
491  * user quits the new parent view by typing 'q'.
492  *
493  * This list of views contains parent views only.
494  * Child views are only pointed to by their parent view.
495  */
496 TAILQ_HEAD(tog_view_list_head, tog_view);
497 
498 struct tog_view {
499 	TAILQ_ENTRY(tog_view) entry;
500 	WINDOW *window;
501 	PANEL *panel;
502 	int nlines, ncols, begin_y, begin_x;
503 	int maxx, x; /* max column and current start column */
504 	int lines, cols; /* copies of LINES and COLS */
505 	int focussed; /* Only set on one parent or child view at a time. */
506 	int dying;
507 	struct tog_view *parent;
508 	struct tog_view *child;
509 
510 	/*
511 	 * This flag is initially set on parent views when a new child view
512 	 * is created. It gets toggled when the 'Tab' key switches focus
513 	 * between parent and child.
514 	 * The flag indicates whether focus should be passed on to our child
515 	 * view if this parent view gets picked for focus after another parent
516 	 * view was closed. This prevents child views from losing focus in such
517 	 * situations.
518 	 */
519 	int focus_child;
520 
521 	/* type-specific state */
522 	enum tog_view_type type;
523 	union {
524 		struct tog_diff_view_state diff;
525 		struct tog_log_view_state log;
526 		struct tog_blame_view_state blame;
527 		struct tog_tree_view_state tree;
528 		struct tog_ref_view_state ref;
529 	} state;
530 
531 	const struct got_error *(*show)(struct tog_view *);
532 	const struct got_error *(*input)(struct tog_view **,
533 	    struct tog_view *, int);
534 	const struct got_error *(*close)(struct tog_view *);
535 
536 	const struct got_error *(*search_start)(struct tog_view *);
537 	const struct got_error *(*search_next)(struct tog_view *);
538 	int search_started;
539 	int searching;
540 #define TOG_SEARCH_FORWARD	1
541 #define TOG_SEARCH_BACKWARD	2
542 	int search_next_done;
543 #define TOG_SEARCH_HAVE_MORE	1
544 #define TOG_SEARCH_NO_MORE	2
545 #define TOG_SEARCH_HAVE_NONE	3
546 	regex_t regex;
547 	regmatch_t regmatch;
548 };
549 
550 static const struct got_error *open_diff_view(struct tog_view *,
551     struct got_object_id *, struct got_object_id *,
552     const char *, const char *, int, int, int, struct tog_view *,
553     struct got_repository *);
554 static const struct got_error *show_diff_view(struct tog_view *);
555 static const struct got_error *input_diff_view(struct tog_view **,
556     struct tog_view *, int);
557 static const struct got_error* close_diff_view(struct tog_view *);
558 static const struct got_error *search_start_diff_view(struct tog_view *);
559 static const struct got_error *search_next_diff_view(struct tog_view *);
560 
561 static const struct got_error *open_log_view(struct tog_view *,
562     struct got_object_id *, struct got_repository *,
563     const char *, const char *, int);
564 static const struct got_error * show_log_view(struct tog_view *);
565 static const struct got_error *input_log_view(struct tog_view **,
566     struct tog_view *, int);
567 static const struct got_error *close_log_view(struct tog_view *);
568 static const struct got_error *search_start_log_view(struct tog_view *);
569 static const struct got_error *search_next_log_view(struct tog_view *);
570 
571 static const struct got_error *open_blame_view(struct tog_view *, char *,
572     struct got_object_id *, struct got_repository *);
573 static const struct got_error *show_blame_view(struct tog_view *);
574 static const struct got_error *input_blame_view(struct tog_view **,
575     struct tog_view *, int);
576 static const struct got_error *close_blame_view(struct tog_view *);
577 static const struct got_error *search_start_blame_view(struct tog_view *);
578 static const struct got_error *search_next_blame_view(struct tog_view *);
579 
580 static const struct got_error *open_tree_view(struct tog_view *,
581     struct got_object_id *, const char *, struct got_repository *);
582 static const struct got_error *show_tree_view(struct tog_view *);
583 static const struct got_error *input_tree_view(struct tog_view **,
584     struct tog_view *, int);
585 static const struct got_error *close_tree_view(struct tog_view *);
586 static const struct got_error *search_start_tree_view(struct tog_view *);
587 static const struct got_error *search_next_tree_view(struct tog_view *);
588 
589 static const struct got_error *open_ref_view(struct tog_view *,
590     struct got_repository *);
591 static const struct got_error *show_ref_view(struct tog_view *);
592 static const struct got_error *input_ref_view(struct tog_view **,
593     struct tog_view *, int);
594 static const struct got_error *close_ref_view(struct tog_view *);
595 static const struct got_error *search_start_ref_view(struct tog_view *);
596 static const struct got_error *search_next_ref_view(struct tog_view *);
597 
598 static volatile sig_atomic_t tog_sigwinch_received;
599 static volatile sig_atomic_t tog_sigpipe_received;
600 static volatile sig_atomic_t tog_sigcont_received;
601 static volatile sig_atomic_t tog_sigint_received;
602 static volatile sig_atomic_t tog_sigterm_received;
603 
604 static void
605 tog_sigwinch(int signo)
606 {
607 	tog_sigwinch_received = 1;
608 }
609 
610 static void
611 tog_sigpipe(int signo)
612 {
613 	tog_sigpipe_received = 1;
614 }
615 
616 static void
617 tog_sigcont(int signo)
618 {
619 	tog_sigcont_received = 1;
620 }
621 
622 static void
623 tog_sigint(int signo)
624 {
625 	tog_sigint_received = 1;
626 }
627 
628 static void
629 tog_sigterm(int signo)
630 {
631 	tog_sigterm_received = 1;
632 }
633 
634 static int
635 tog_fatal_signal_received(void)
636 {
637 	return (tog_sigpipe_received ||
638 	    tog_sigint_received || tog_sigint_received);
639 }
640 
641 
642 static const struct got_error *
643 view_close(struct tog_view *view)
644 {
645 	const struct got_error *err = NULL;
646 
647 	if (view->child) {
648 		view_close(view->child);
649 		view->child = NULL;
650 	}
651 	if (view->close)
652 		err = view->close(view);
653 	if (view->panel)
654 		del_panel(view->panel);
655 	if (view->window)
656 		delwin(view->window);
657 	free(view);
658 	return err;
659 }
660 
661 static struct tog_view *
662 view_open(int nlines, int ncols, int begin_y, int begin_x,
663     enum tog_view_type type)
664 {
665 	struct tog_view *view = calloc(1, sizeof(*view));
666 
667 	if (view == NULL)
668 		return NULL;
669 
670 	view->type = type;
671 	view->lines = LINES;
672 	view->cols = COLS;
673 	view->nlines = nlines ? nlines : LINES - begin_y;
674 	view->ncols = ncols ? ncols : COLS - begin_x;
675 	view->begin_y = begin_y;
676 	view->begin_x = begin_x;
677 	view->window = newwin(nlines, ncols, begin_y, begin_x);
678 	if (view->window == NULL) {
679 		view_close(view);
680 		return NULL;
681 	}
682 	view->panel = new_panel(view->window);
683 	if (view->panel == NULL ||
684 	    set_panel_userptr(view->panel, view) != OK) {
685 		view_close(view);
686 		return NULL;
687 	}
688 
689 	keypad(view->window, TRUE);
690 	return view;
691 }
692 
693 static int
694 view_split_begin_x(int begin_x)
695 {
696 	if (begin_x > 0 || COLS < 120)
697 		return 0;
698 	return (COLS - MAX(COLS / 2, 80));
699 }
700 
701 static const struct got_error *view_resize(struct tog_view *);
702 
703 static const struct got_error *
704 view_splitscreen(struct tog_view *view)
705 {
706 	const struct got_error *err = NULL;
707 
708 	view->begin_y = 0;
709 	view->begin_x = view_split_begin_x(0);
710 	view->nlines = LINES;
711 	view->ncols = COLS - view->begin_x;
712 	view->lines = LINES;
713 	view->cols = COLS;
714 	err = view_resize(view);
715 	if (err)
716 		return err;
717 
718 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
719 		return got_error_from_errno("mvwin");
720 
721 	return NULL;
722 }
723 
724 static const struct got_error *
725 view_fullscreen(struct tog_view *view)
726 {
727 	const struct got_error *err = NULL;
728 
729 	view->begin_x = 0;
730 	view->begin_y = 0;
731 	view->nlines = LINES;
732 	view->ncols = COLS;
733 	view->lines = LINES;
734 	view->cols = COLS;
735 	err = view_resize(view);
736 	if (err)
737 		return err;
738 
739 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
740 		return got_error_from_errno("mvwin");
741 
742 	return NULL;
743 }
744 
745 static int
746 view_is_parent_view(struct tog_view *view)
747 {
748 	return view->parent == NULL;
749 }
750 
751 static const struct got_error *
752 view_resize(struct tog_view *view)
753 {
754 	int nlines, ncols;
755 
756 	if (view->lines > LINES)
757 		nlines = view->nlines - (view->lines - LINES);
758 	else
759 		nlines = view->nlines + (LINES - view->lines);
760 
761 	if (view->cols > COLS)
762 		ncols = view->ncols - (view->cols - COLS);
763 	else
764 		ncols = view->ncols + (COLS - view->cols);
765 
766 	if (view->child) {
767 		view->child->begin_x = view_split_begin_x(view->begin_x);
768 		if (view->child->begin_x == 0) {
769 			ncols = COLS;
770 
771 			view_fullscreen(view->child);
772 			if (view->child->focussed)
773 				show_panel(view->child->panel);
774 			else
775 				show_panel(view->panel);
776 		} else {
777 			ncols = view->child->begin_x;
778 
779 			view_splitscreen(view->child);
780 			show_panel(view->child->panel);
781 		}
782 	} else if (view->parent == NULL)
783 		ncols = COLS;
784 
785 	if (wresize(view->window, nlines, ncols) == ERR)
786 		return got_error_from_errno("wresize");
787 	if (replace_panel(view->panel, view->window) == ERR)
788 		return got_error_from_errno("replace_panel");
789 	wclear(view->window);
790 
791 	view->nlines = nlines;
792 	view->ncols = ncols;
793 	view->lines = LINES;
794 	view->cols = COLS;
795 
796 	return NULL;
797 }
798 
799 static const struct got_error *
800 view_close_child(struct tog_view *view)
801 {
802 	const struct got_error *err = NULL;
803 
804 	if (view->child == NULL)
805 		return NULL;
806 
807 	err = view_close(view->child);
808 	view->child = NULL;
809 	return err;
810 }
811 
812 static const struct got_error *
813 view_set_child(struct tog_view *view, struct tog_view *child)
814 {
815 	view->child = child;
816 	child->parent = view;
817 
818 	return view_resize(view);
819 }
820 
821 static int
822 view_is_splitscreen(struct tog_view *view)
823 {
824 	return view->begin_x > 0;
825 }
826 
827 static void
828 tog_resizeterm(void)
829 {
830 	int cols, lines;
831 	struct winsize size;
832 
833 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
834 		cols = 80;     /* Default */
835 		lines = 24;
836 	} else {
837 		cols = size.ws_col;
838 		lines = size.ws_row;
839 	}
840 	resize_term(lines, cols);
841 }
842 
843 static const struct got_error *
844 view_search_start(struct tog_view *view)
845 {
846 	const struct got_error *err = NULL;
847 	char pattern[1024];
848 	int ret;
849 
850 	if (view->search_started) {
851 		regfree(&view->regex);
852 		view->searching = 0;
853 		memset(&view->regmatch, 0, sizeof(view->regmatch));
854 	}
855 	view->search_started = 0;
856 
857 	if (view->nlines < 1)
858 		return NULL;
859 
860 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
861 	wclrtoeol(view->window);
862 
863 	nocbreak();
864 	echo();
865 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
866 	cbreak();
867 	noecho();
868 	if (ret == ERR)
869 		return NULL;
870 
871 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
872 		err = view->search_start(view);
873 		if (err) {
874 			regfree(&view->regex);
875 			return err;
876 		}
877 		view->search_started = 1;
878 		view->searching = TOG_SEARCH_FORWARD;
879 		view->search_next_done = 0;
880 		view->search_next(view);
881 	}
882 
883 	return NULL;
884 }
885 
886 static const struct got_error *
887 view_input(struct tog_view **new, int *done, struct tog_view *view,
888     struct tog_view_list_head *views)
889 {
890 	const struct got_error *err = NULL;
891 	struct tog_view *v;
892 	int ch, errcode;
893 
894 	*new = NULL;
895 
896 	/* Clear "no matches" indicator. */
897 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
898 	    view->search_next_done == TOG_SEARCH_HAVE_NONE)
899 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
900 
901 	if (view->searching && !view->search_next_done) {
902 		errcode = pthread_mutex_unlock(&tog_mutex);
903 		if (errcode)
904 			return got_error_set_errno(errcode,
905 			    "pthread_mutex_unlock");
906 		sched_yield();
907 		errcode = pthread_mutex_lock(&tog_mutex);
908 		if (errcode)
909 			return got_error_set_errno(errcode,
910 			    "pthread_mutex_lock");
911 		view->search_next(view);
912 		return NULL;
913 	}
914 
915 	nodelay(stdscr, FALSE);
916 	/* Allow threads to make progress while we are waiting for input. */
917 	errcode = pthread_mutex_unlock(&tog_mutex);
918 	if (errcode)
919 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
920 	ch = wgetch(view->window);
921 	errcode = pthread_mutex_lock(&tog_mutex);
922 	if (errcode)
923 		return got_error_set_errno(errcode, "pthread_mutex_lock");
924 	nodelay(stdscr, TRUE);
925 
926 	if (tog_sigwinch_received || tog_sigcont_received) {
927 		tog_resizeterm();
928 		tog_sigwinch_received = 0;
929 		tog_sigcont_received = 0;
930 		TAILQ_FOREACH(v, views, entry) {
931 			err = view_resize(v);
932 			if (err)
933 				return err;
934 			err = v->input(new, v, KEY_RESIZE);
935 			if (err)
936 				return err;
937 			if (v->child) {
938 				err = view_resize(v->child);
939 				if (err)
940 					return err;
941 				err = v->child->input(new, v->child,
942 				    KEY_RESIZE);
943 				if (err)
944 					return err;
945 			}
946 		}
947 	}
948 
949 	switch (ch) {
950 	case '\t':
951 		if (view->child) {
952 			view->focussed = 0;
953 			view->child->focussed = 1;
954 			view->focus_child = 1;
955 		} else if (view->parent) {
956 			view->focussed = 0;
957 			view->parent->focussed = 1;
958 			view->parent->focus_child = 0;
959 		}
960 		break;
961 	case 'q':
962 		err = view->input(new, view, ch);
963 		view->dying = 1;
964 		break;
965 	case 'Q':
966 		*done = 1;
967 		break;
968 	case 'f':
969 		if (view_is_parent_view(view)) {
970 			if (view->child == NULL)
971 				break;
972 			if (view_is_splitscreen(view->child)) {
973 				view->focussed = 0;
974 				view->child->focussed = 1;
975 				err = view_fullscreen(view->child);
976 			} else
977 				err = view_splitscreen(view->child);
978 			if (err)
979 				break;
980 			err = view->child->input(new, view->child,
981 			    KEY_RESIZE);
982 		} else {
983 			if (view_is_splitscreen(view)) {
984 				view->parent->focussed = 0;
985 				view->focussed = 1;
986 				err = view_fullscreen(view);
987 			} else {
988 				err = view_splitscreen(view);
989 			}
990 			if (err)
991 				break;
992 			err = view->input(new, view, KEY_RESIZE);
993 		}
994 		break;
995 	case KEY_RESIZE:
996 		break;
997 	case '/':
998 		if (view->search_start)
999 			view_search_start(view);
1000 		else
1001 			err = view->input(new, view, ch);
1002 		break;
1003 	case 'N':
1004 	case 'n':
1005 		if (view->search_started && view->search_next) {
1006 			view->searching = (ch == 'n' ?
1007 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1008 			view->search_next_done = 0;
1009 			view->search_next(view);
1010 		} else
1011 			err = view->input(new, view, ch);
1012 		break;
1013 	default:
1014 		err = view->input(new, view, ch);
1015 		break;
1016 	}
1017 
1018 	return err;
1019 }
1020 
1021 void
1022 view_vborder(struct tog_view *view)
1023 {
1024 	PANEL *panel;
1025 	const struct tog_view *view_above;
1026 
1027 	if (view->parent)
1028 		return view_vborder(view->parent);
1029 
1030 	panel = panel_above(view->panel);
1031 	if (panel == NULL)
1032 		return;
1033 
1034 	view_above = panel_userptr(panel);
1035 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1036 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
1037 }
1038 
1039 int
1040 view_needs_focus_indication(struct tog_view *view)
1041 {
1042 	if (view_is_parent_view(view)) {
1043 		if (view->child == NULL || view->child->focussed)
1044 			return 0;
1045 		if (!view_is_splitscreen(view->child))
1046 			return 0;
1047 	} else if (!view_is_splitscreen(view))
1048 		return 0;
1049 
1050 	return view->focussed;
1051 }
1052 
1053 static const struct got_error *
1054 view_loop(struct tog_view *view)
1055 {
1056 	const struct got_error *err = NULL;
1057 	struct tog_view_list_head views;
1058 	struct tog_view *new_view;
1059 	int fast_refresh = 10;
1060 	int done = 0, errcode;
1061 
1062 	errcode = pthread_mutex_lock(&tog_mutex);
1063 	if (errcode)
1064 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1065 
1066 	TAILQ_INIT(&views);
1067 	TAILQ_INSERT_HEAD(&views, view, entry);
1068 
1069 	view->focussed = 1;
1070 	err = view->show(view);
1071 	if (err)
1072 		return err;
1073 	update_panels();
1074 	doupdate();
1075 	while (!TAILQ_EMPTY(&views) && !done && !tog_fatal_signal_received()) {
1076 		/* Refresh fast during initialization, then become slower. */
1077 		if (fast_refresh && fast_refresh-- == 0)
1078 			halfdelay(10); /* switch to once per second */
1079 
1080 		err = view_input(&new_view, &done, view, &views);
1081 		if (err)
1082 			break;
1083 		if (view->dying) {
1084 			struct tog_view *v, *prev = NULL;
1085 
1086 			if (view_is_parent_view(view))
1087 				prev = TAILQ_PREV(view, tog_view_list_head,
1088 				    entry);
1089 			else if (view->parent)
1090 				prev = view->parent;
1091 
1092 			if (view->parent) {
1093 				view->parent->child = NULL;
1094 				view->parent->focus_child = 0;
1095 
1096 				err = view_resize(view->parent);
1097 				if (err)
1098 					break;
1099 			} else
1100 				TAILQ_REMOVE(&views, view, entry);
1101 
1102 			err = view_close(view);
1103 			if (err)
1104 				goto done;
1105 
1106 			view = NULL;
1107 			TAILQ_FOREACH(v, &views, entry) {
1108 				if (v->focussed)
1109 					break;
1110 			}
1111 			if (view == NULL && new_view == NULL) {
1112 				/* No view has focus. Try to pick one. */
1113 				if (prev)
1114 					view = prev;
1115 				else if (!TAILQ_EMPTY(&views)) {
1116 					view = TAILQ_LAST(&views,
1117 					    tog_view_list_head);
1118 				}
1119 				if (view) {
1120 					if (view->focus_child) {
1121 						view->child->focussed = 1;
1122 						view = view->child;
1123 					} else
1124 						view->focussed = 1;
1125 				}
1126 			}
1127 		}
1128 		if (new_view) {
1129 			struct tog_view *v, *t;
1130 			/* Only allow one parent view per type. */
1131 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1132 				if (v->type != new_view->type)
1133 					continue;
1134 				TAILQ_REMOVE(&views, v, entry);
1135 				err = view_close(v);
1136 				if (err)
1137 					goto done;
1138 				break;
1139 			}
1140 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1141 			view = new_view;
1142 		}
1143 		if (view) {
1144 			if (view_is_parent_view(view)) {
1145 				if (view->child && view->child->focussed)
1146 					view = view->child;
1147 			} else {
1148 				if (view->parent && view->parent->focussed)
1149 					view = view->parent;
1150 			}
1151 			show_panel(view->panel);
1152 			if (view->child && view_is_splitscreen(view->child))
1153 				show_panel(view->child->panel);
1154 			if (view->parent && view_is_splitscreen(view)) {
1155 				err = view->parent->show(view->parent);
1156 				if (err)
1157 					goto done;
1158 			}
1159 			err = view->show(view);
1160 			if (err)
1161 				goto done;
1162 			if (view->child) {
1163 				err = view->child->show(view->child);
1164 				if (err)
1165 					goto done;
1166 			}
1167 			update_panels();
1168 			doupdate();
1169 		}
1170 	}
1171 done:
1172 	while (!TAILQ_EMPTY(&views)) {
1173 		view = TAILQ_FIRST(&views);
1174 		TAILQ_REMOVE(&views, view, entry);
1175 		view_close(view);
1176 	}
1177 
1178 	errcode = pthread_mutex_unlock(&tog_mutex);
1179 	if (errcode && err == NULL)
1180 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1181 
1182 	return err;
1183 }
1184 
1185 __dead static void
1186 usage_log(void)
1187 {
1188 	endwin();
1189 	fprintf(stderr,
1190 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1191 	    getprogname());
1192 	exit(1);
1193 }
1194 
1195 /* Create newly allocated wide-character string equivalent to a byte string. */
1196 static const struct got_error *
1197 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1198 {
1199 	char *vis = NULL;
1200 	const struct got_error *err = NULL;
1201 
1202 	*ws = NULL;
1203 	*wlen = mbstowcs(NULL, s, 0);
1204 	if (*wlen == (size_t)-1) {
1205 		int vislen;
1206 		if (errno != EILSEQ)
1207 			return got_error_from_errno("mbstowcs");
1208 
1209 		/* byte string invalid in current encoding; try to "fix" it */
1210 		err = got_mbsavis(&vis, &vislen, s);
1211 		if (err)
1212 			return err;
1213 		*wlen = mbstowcs(NULL, vis, 0);
1214 		if (*wlen == (size_t)-1) {
1215 			err = got_error_from_errno("mbstowcs"); /* give up */
1216 			goto done;
1217 		}
1218 	}
1219 
1220 	*ws = calloc(*wlen + 1, sizeof(**ws));
1221 	if (*ws == NULL) {
1222 		err = got_error_from_errno("calloc");
1223 		goto done;
1224 	}
1225 
1226 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1227 		err = got_error_from_errno("mbstowcs");
1228 done:
1229 	free(vis);
1230 	if (err) {
1231 		free(*ws);
1232 		*ws = NULL;
1233 		*wlen = 0;
1234 	}
1235 	return err;
1236 }
1237 
1238 static const struct got_error *
1239 expand_tab(char **ptr, const char *src)
1240 {
1241 	char	*dst;
1242 	size_t	 len, n, idx = 0, sz = 0;
1243 
1244 	*ptr = NULL;
1245 	n = len = strlen(src);
1246 	dst = malloc(n + 1);
1247 	if (dst == NULL)
1248 		return got_error_from_errno("malloc");
1249 
1250 	while (idx < len && src[idx]) {
1251 		const char c = src[idx];
1252 
1253 		if (c == '\t') {
1254 			size_t nb = TABSIZE - sz % TABSIZE;
1255 			char *p;
1256 
1257 			p = realloc(dst, n + nb);
1258 			if (p == NULL) {
1259 				free(dst);
1260 				return got_error_from_errno("realloc");
1261 
1262 			}
1263 			dst = p;
1264 			n += nb;
1265 			memset(dst + sz, ' ', nb);
1266 			sz += nb;
1267 		} else
1268 			dst[sz++] = src[idx];
1269 		++idx;
1270 	}
1271 
1272 	dst[sz] = '\0';
1273 	*ptr = dst;
1274 	return NULL;
1275 }
1276 
1277 /*
1278  * Advance at most n columns from wline starting at offset off.
1279  * Return the index to the first character after the span operation.
1280  * Return the combined column width of all spanned wide character in
1281  * *rcol.
1282  */
1283 static int
1284 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1285 {
1286 	int width, i, cols = 0;
1287 
1288 	if (n == 0) {
1289 		*rcol = cols;
1290 		return off;
1291 	}
1292 
1293 	for (i = off; wline[i] != L'\0'; ++i) {
1294 		if (wline[i] == L'\t')
1295 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1296 		else
1297 			width = wcwidth(wline[i]);
1298 
1299 		if (width == -1) {
1300 			width = 1;
1301 			wline[i] = L'.';
1302 		}
1303 
1304 		if (cols + width > n)
1305 			break;
1306 		cols += width;
1307 	}
1308 
1309 	*rcol = cols;
1310 	return i;
1311 }
1312 
1313 /*
1314  * Format a line for display, ensuring that it won't overflow a width limit.
1315  * With scrolling, the width returned refers to the scrolled version of the
1316  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1317  */
1318 static const struct got_error *
1319 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1320     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1321 {
1322 	const struct got_error *err = NULL;
1323 	int cols;
1324 	wchar_t *wline = NULL;
1325 	char *exstr = NULL;
1326 	size_t wlen;
1327 	int i, scrollx;
1328 
1329 	*wlinep = NULL;
1330 	*widthp = 0;
1331 
1332 	if (expand) {
1333 		err = expand_tab(&exstr, line);
1334 		if (err)
1335 			return err;
1336 	}
1337 
1338 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1339 	free(exstr);
1340 	if (err)
1341 		return err;
1342 
1343 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1344 
1345 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1346 		wline[wlen - 1] = L'\0';
1347 		wlen--;
1348 	}
1349 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1350 		wline[wlen - 1] = L'\0';
1351 		wlen--;
1352 	}
1353 
1354 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1355 	wline[i] = L'\0';
1356 
1357 	if (widthp)
1358 		*widthp = cols;
1359 	if (scrollxp)
1360 		*scrollxp = scrollx;
1361 	if (err)
1362 		free(wline);
1363 	else
1364 		*wlinep = wline;
1365 	return err;
1366 }
1367 
1368 static const struct got_error*
1369 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1370     struct got_object_id *id, struct got_repository *repo)
1371 {
1372 	static const struct got_error *err = NULL;
1373 	struct got_reflist_entry *re;
1374 	char *s;
1375 	const char *name;
1376 
1377 	*refs_str = NULL;
1378 
1379 	TAILQ_FOREACH(re, refs, entry) {
1380 		struct got_tag_object *tag = NULL;
1381 		struct got_object_id *ref_id;
1382 		int cmp;
1383 
1384 		name = got_ref_get_name(re->ref);
1385 		if (strcmp(name, GOT_REF_HEAD) == 0)
1386 			continue;
1387 		if (strncmp(name, "refs/", 5) == 0)
1388 			name += 5;
1389 		if (strncmp(name, "got/", 4) == 0 &&
1390 		    strncmp(name, "got/backup/", 11) != 0)
1391 			continue;
1392 		if (strncmp(name, "heads/", 6) == 0)
1393 			name += 6;
1394 		if (strncmp(name, "remotes/", 8) == 0) {
1395 			name += 8;
1396 			s = strstr(name, "/" GOT_REF_HEAD);
1397 			if (s != NULL && s[strlen(s)] == '\0')
1398 				continue;
1399 		}
1400 		err = got_ref_resolve(&ref_id, repo, re->ref);
1401 		if (err)
1402 			break;
1403 		if (strncmp(name, "tags/", 5) == 0) {
1404 			err = got_object_open_as_tag(&tag, repo, ref_id);
1405 			if (err) {
1406 				if (err->code != GOT_ERR_OBJ_TYPE) {
1407 					free(ref_id);
1408 					break;
1409 				}
1410 				/* Ref points at something other than a tag. */
1411 				err = NULL;
1412 				tag = NULL;
1413 			}
1414 		}
1415 		cmp = got_object_id_cmp(tag ?
1416 		    got_object_tag_get_object_id(tag) : ref_id, id);
1417 		free(ref_id);
1418 		if (tag)
1419 			got_object_tag_close(tag);
1420 		if (cmp != 0)
1421 			continue;
1422 		s = *refs_str;
1423 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1424 		    s ? ", " : "", name) == -1) {
1425 			err = got_error_from_errno("asprintf");
1426 			free(s);
1427 			*refs_str = NULL;
1428 			break;
1429 		}
1430 		free(s);
1431 	}
1432 
1433 	return err;
1434 }
1435 
1436 static const struct got_error *
1437 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1438     int col_tab_align)
1439 {
1440 	char *smallerthan;
1441 
1442 	smallerthan = strchr(author, '<');
1443 	if (smallerthan && smallerthan[1] != '\0')
1444 		author = smallerthan + 1;
1445 	author[strcspn(author, "@>")] = '\0';
1446 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1447 	    col_tab_align, 0);
1448 }
1449 
1450 static const struct got_error *
1451 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1452     struct got_object_id *id, const size_t date_display_cols,
1453     int author_display_cols)
1454 {
1455 	struct tog_log_view_state *s = &view->state.log;
1456 	const struct got_error *err = NULL;
1457 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1458 	char *logmsg0 = NULL, *logmsg = NULL;
1459 	char *author = NULL;
1460 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1461 	int author_width, logmsg_width;
1462 	char *newline, *line = NULL;
1463 	int col, limit, scrollx;
1464 	const int avail = view->ncols;
1465 	struct tm tm;
1466 	time_t committer_time;
1467 	struct tog_color *tc;
1468 
1469 	committer_time = got_object_commit_get_committer_time(commit);
1470 	if (gmtime_r(&committer_time, &tm) == NULL)
1471 		return got_error_from_errno("gmtime_r");
1472 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1473 		return got_error(GOT_ERR_NO_SPACE);
1474 
1475 	if (avail <= date_display_cols)
1476 		limit = MIN(sizeof(datebuf) - 1, avail);
1477 	else
1478 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1479 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1480 	if (tc)
1481 		wattr_on(view->window,
1482 		    COLOR_PAIR(tc->colorpair), NULL);
1483 	waddnstr(view->window, datebuf, limit);
1484 	if (tc)
1485 		wattr_off(view->window,
1486 		    COLOR_PAIR(tc->colorpair), NULL);
1487 	col = limit;
1488 	if (col > avail)
1489 		goto done;
1490 
1491 	if (avail >= 120) {
1492 		char *id_str;
1493 		err = got_object_id_str(&id_str, id);
1494 		if (err)
1495 			goto done;
1496 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1497 		if (tc)
1498 			wattr_on(view->window,
1499 			    COLOR_PAIR(tc->colorpair), NULL);
1500 		wprintw(view->window, "%.8s ", id_str);
1501 		if (tc)
1502 			wattr_off(view->window,
1503 			    COLOR_PAIR(tc->colorpair), NULL);
1504 		free(id_str);
1505 		col += 9;
1506 		if (col > avail)
1507 			goto done;
1508 	}
1509 
1510 	author = strdup(got_object_commit_get_author(commit));
1511 	if (author == NULL) {
1512 		err = got_error_from_errno("strdup");
1513 		goto done;
1514 	}
1515 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1516 	if (err)
1517 		goto done;
1518 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1519 	if (tc)
1520 		wattr_on(view->window,
1521 		    COLOR_PAIR(tc->colorpair), NULL);
1522 	waddwstr(view->window, wauthor);
1523 	if (tc)
1524 		wattr_off(view->window,
1525 		    COLOR_PAIR(tc->colorpair), NULL);
1526 	col += author_width;
1527 	while (col < avail && author_width < author_display_cols + 2) {
1528 		waddch(view->window, ' ');
1529 		col++;
1530 		author_width++;
1531 	}
1532 	if (col > avail)
1533 		goto done;
1534 
1535 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1536 	if (err)
1537 		goto done;
1538 	logmsg = logmsg0;
1539 	while (*logmsg == '\n')
1540 		logmsg++;
1541 	newline = strchr(logmsg, '\n');
1542 	if (newline)
1543 		*newline = '\0';
1544 	limit = avail - col;
1545 	if (view->child && limit > 0)
1546 		limit--;	/* for the border */
1547 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
1548 	    limit, col, 1);
1549 	if (err)
1550 		goto done;
1551 	waddwstr(view->window, &wlogmsg[scrollx]);
1552 	col += MAX(logmsg_width, 0);
1553 	while (col < avail) {
1554 		waddch(view->window, ' ');
1555 		col++;
1556 	}
1557 done:
1558 	free(logmsg0);
1559 	free(wlogmsg);
1560 	free(author);
1561 	free(wauthor);
1562 	free(line);
1563 	return err;
1564 }
1565 
1566 static struct commit_queue_entry *
1567 alloc_commit_queue_entry(struct got_commit_object *commit,
1568     struct got_object_id *id)
1569 {
1570 	struct commit_queue_entry *entry;
1571 
1572 	entry = calloc(1, sizeof(*entry));
1573 	if (entry == NULL)
1574 		return NULL;
1575 
1576 	entry->id = id;
1577 	entry->commit = commit;
1578 	return entry;
1579 }
1580 
1581 static void
1582 pop_commit(struct commit_queue *commits)
1583 {
1584 	struct commit_queue_entry *entry;
1585 
1586 	entry = TAILQ_FIRST(&commits->head);
1587 	TAILQ_REMOVE(&commits->head, entry, entry);
1588 	got_object_commit_close(entry->commit);
1589 	commits->ncommits--;
1590 	/* Don't free entry->id! It is owned by the commit graph. */
1591 	free(entry);
1592 }
1593 
1594 static void
1595 free_commits(struct commit_queue *commits)
1596 {
1597 	while (!TAILQ_EMPTY(&commits->head))
1598 		pop_commit(commits);
1599 }
1600 
1601 static const struct got_error *
1602 match_commit(int *have_match, struct got_object_id *id,
1603     struct got_commit_object *commit, regex_t *regex)
1604 {
1605 	const struct got_error *err = NULL;
1606 	regmatch_t regmatch;
1607 	char *id_str = NULL, *logmsg = NULL;
1608 
1609 	*have_match = 0;
1610 
1611 	err = got_object_id_str(&id_str, id);
1612 	if (err)
1613 		return err;
1614 
1615 	err = got_object_commit_get_logmsg(&logmsg, commit);
1616 	if (err)
1617 		goto done;
1618 
1619 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1620 	    &regmatch, 0) == 0 ||
1621 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1622 	    &regmatch, 0) == 0 ||
1623 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1624 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1625 		*have_match = 1;
1626 done:
1627 	free(id_str);
1628 	free(logmsg);
1629 	return err;
1630 }
1631 
1632 static const struct got_error *
1633 queue_commits(struct tog_log_thread_args *a)
1634 {
1635 	const struct got_error *err = NULL;
1636 
1637 	/*
1638 	 * We keep all commits open throughout the lifetime of the log
1639 	 * view in order to avoid having to re-fetch commits from disk
1640 	 * while updating the display.
1641 	 */
1642 	do {
1643 		struct got_object_id *id;
1644 		struct got_commit_object *commit;
1645 		struct commit_queue_entry *entry;
1646 		int errcode;
1647 
1648 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1649 		    NULL, NULL);
1650 		if (err || id == NULL)
1651 			break;
1652 
1653 		err = got_object_open_as_commit(&commit, a->repo, id);
1654 		if (err)
1655 			break;
1656 		entry = alloc_commit_queue_entry(commit, id);
1657 		if (entry == NULL) {
1658 			err = got_error_from_errno("alloc_commit_queue_entry");
1659 			break;
1660 		}
1661 
1662 		errcode = pthread_mutex_lock(&tog_mutex);
1663 		if (errcode) {
1664 			err = got_error_set_errno(errcode,
1665 			    "pthread_mutex_lock");
1666 			break;
1667 		}
1668 
1669 		entry->idx = a->commits->ncommits;
1670 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1671 		a->commits->ncommits++;
1672 
1673 		if (*a->searching == TOG_SEARCH_FORWARD &&
1674 		    !*a->search_next_done) {
1675 			int have_match;
1676 			err = match_commit(&have_match, id, commit, a->regex);
1677 			if (err)
1678 				break;
1679 			if (have_match)
1680 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1681 		}
1682 
1683 		errcode = pthread_mutex_unlock(&tog_mutex);
1684 		if (errcode && err == NULL)
1685 			err = got_error_set_errno(errcode,
1686 			    "pthread_mutex_unlock");
1687 		if (err)
1688 			break;
1689 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1690 
1691 	return err;
1692 }
1693 
1694 static void
1695 select_commit(struct tog_log_view_state *s)
1696 {
1697 	struct commit_queue_entry *entry;
1698 	int ncommits = 0;
1699 
1700 	entry = s->first_displayed_entry;
1701 	while (entry) {
1702 		if (ncommits == s->selected) {
1703 			s->selected_entry = entry;
1704 			break;
1705 		}
1706 		entry = TAILQ_NEXT(entry, entry);
1707 		ncommits++;
1708 	}
1709 }
1710 
1711 static const struct got_error *
1712 draw_commits(struct tog_view *view)
1713 {
1714 	const struct got_error *err = NULL;
1715 	struct tog_log_view_state *s = &view->state.log;
1716 	struct commit_queue_entry *entry = s->selected_entry;
1717 	const int limit = view->nlines;
1718 	int width;
1719 	int ncommits, author_cols = 4;
1720 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1721 	char *refs_str = NULL;
1722 	wchar_t *wline;
1723 	struct tog_color *tc;
1724 	static const size_t date_display_cols = 12;
1725 
1726 	if (s->selected_entry &&
1727 	    !(view->searching && view->search_next_done == 0)) {
1728 		struct got_reflist_head *refs;
1729 		err = got_object_id_str(&id_str, s->selected_entry->id);
1730 		if (err)
1731 			return err;
1732 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1733 		    s->selected_entry->id);
1734 		if (refs) {
1735 			err = build_refs_str(&refs_str, refs,
1736 			    s->selected_entry->id, s->repo);
1737 			if (err)
1738 				goto done;
1739 		}
1740 	}
1741 
1742 	if (s->thread_args.commits_needed == 0)
1743 		halfdelay(10); /* disable fast refresh */
1744 
1745 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
1746 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1747 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1748 		    (view->searching && !view->search_next_done) ?
1749 		    "searching..." : "loading...") == -1) {
1750 			err = got_error_from_errno("asprintf");
1751 			goto done;
1752 		}
1753 	} else {
1754 		const char *search_str = NULL;
1755 
1756 		if (view->searching) {
1757 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1758 				search_str = "no more matches";
1759 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1760 				search_str = "no matches found";
1761 			else if (!view->search_next_done)
1762 				search_str = "searching...";
1763 		}
1764 
1765 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1766 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1767 		    search_str ? search_str :
1768 		    (refs_str ? refs_str : "")) == -1) {
1769 			err = got_error_from_errno("asprintf");
1770 			goto done;
1771 		}
1772 	}
1773 
1774 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1775 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
1776 		    "........................................",
1777 		    s->in_repo_path, ncommits_str) == -1) {
1778 			err = got_error_from_errno("asprintf");
1779 			header = NULL;
1780 			goto done;
1781 		}
1782 	} else if (asprintf(&header, "commit %s%s",
1783 	    id_str ? id_str : "........................................",
1784 	    ncommits_str) == -1) {
1785 		err = got_error_from_errno("asprintf");
1786 		header = NULL;
1787 		goto done;
1788 	}
1789 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
1790 	if (err)
1791 		goto done;
1792 
1793 	werase(view->window);
1794 
1795 	if (view_needs_focus_indication(view))
1796 		wstandout(view->window);
1797 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1798 	if (tc)
1799 		wattr_on(view->window,
1800 		    COLOR_PAIR(tc->colorpair), NULL);
1801 	waddwstr(view->window, wline);
1802 	if (tc)
1803 		wattr_off(view->window,
1804 		    COLOR_PAIR(tc->colorpair), NULL);
1805 	while (width < view->ncols) {
1806 		waddch(view->window, ' ');
1807 		width++;
1808 	}
1809 	if (view_needs_focus_indication(view))
1810 		wstandend(view->window);
1811 	free(wline);
1812 	if (limit <= 1)
1813 		goto done;
1814 
1815 	/* Grow author column size if necessary, and set view->maxx. */
1816 	entry = s->first_displayed_entry;
1817 	ncommits = 0;
1818 	view->maxx = 0;
1819 	while (entry) {
1820 		char *author, *eol, *msg, *msg0;
1821 		wchar_t *wauthor, *wmsg;
1822 		int width;
1823 		if (ncommits >= limit - 1)
1824 			break;
1825 		author = strdup(got_object_commit_get_author(entry->commit));
1826 		if (author == NULL) {
1827 			err = got_error_from_errno("strdup");
1828 			goto done;
1829 		}
1830 		err = format_author(&wauthor, &width, author, COLS,
1831 		    date_display_cols);
1832 		if (author_cols < width)
1833 			author_cols = width;
1834 		free(wauthor);
1835 		free(author);
1836 		err = got_object_commit_get_logmsg(&msg0, entry->commit);
1837 		if (err)
1838 			goto done;
1839 		msg = msg0;
1840 		while (*msg == '\n')
1841 			++msg;
1842 		if ((eol = strchr(msg, '\n')))
1843 			*eol = '\0';
1844 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
1845 		    date_display_cols + author_cols, 0);
1846 		if (err)
1847 			goto done;
1848 		view->maxx = MAX(view->maxx, width);
1849 		free(msg0);
1850 		free(wmsg);
1851 		ncommits++;
1852 		entry = TAILQ_NEXT(entry, entry);
1853 	}
1854 
1855 	entry = s->first_displayed_entry;
1856 	s->last_displayed_entry = s->first_displayed_entry;
1857 	ncommits = 0;
1858 	while (entry) {
1859 		if (ncommits >= limit - 1)
1860 			break;
1861 		if (ncommits == s->selected)
1862 			wstandout(view->window);
1863 		err = draw_commit(view, entry->commit, entry->id,
1864 		    date_display_cols, author_cols);
1865 		if (ncommits == s->selected)
1866 			wstandend(view->window);
1867 		if (err)
1868 			goto done;
1869 		ncommits++;
1870 		s->last_displayed_entry = entry;
1871 		entry = TAILQ_NEXT(entry, entry);
1872 	}
1873 
1874 	view_vborder(view);
1875 done:
1876 	free(id_str);
1877 	free(refs_str);
1878 	free(ncommits_str);
1879 	free(header);
1880 	return err;
1881 }
1882 
1883 static void
1884 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1885 {
1886 	struct commit_queue_entry *entry;
1887 	int nscrolled = 0;
1888 
1889 	entry = TAILQ_FIRST(&s->commits.head);
1890 	if (s->first_displayed_entry == entry)
1891 		return;
1892 
1893 	entry = s->first_displayed_entry;
1894 	while (entry && nscrolled < maxscroll) {
1895 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1896 		if (entry) {
1897 			s->first_displayed_entry = entry;
1898 			nscrolled++;
1899 		}
1900 	}
1901 }
1902 
1903 static const struct got_error *
1904 trigger_log_thread(struct tog_view *view, int wait)
1905 {
1906 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1907 	int errcode;
1908 
1909 	halfdelay(1); /* fast refresh while loading commits */
1910 
1911 	while (ta->commits_needed > 0 || ta->load_all) {
1912 		if (ta->log_complete)
1913 			break;
1914 
1915 		/* Wake the log thread. */
1916 		errcode = pthread_cond_signal(&ta->need_commits);
1917 		if (errcode)
1918 			return got_error_set_errno(errcode,
1919 			    "pthread_cond_signal");
1920 
1921 		/*
1922 		 * The mutex will be released while the view loop waits
1923 		 * in wgetch(), at which time the log thread will run.
1924 		 */
1925 		if (!wait)
1926 			break;
1927 
1928 		/* Display progress update in log view. */
1929 		show_log_view(view);
1930 		update_panels();
1931 		doupdate();
1932 
1933 		/* Wait right here while next commit is being loaded. */
1934 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1935 		if (errcode)
1936 			return got_error_set_errno(errcode,
1937 			    "pthread_cond_wait");
1938 
1939 		/* Display progress update in log view. */
1940 		show_log_view(view);
1941 		update_panels();
1942 		doupdate();
1943 	}
1944 
1945 	return NULL;
1946 }
1947 
1948 static const struct got_error *
1949 log_scroll_down(struct tog_view *view, int maxscroll)
1950 {
1951 	struct tog_log_view_state *s = &view->state.log;
1952 	const struct got_error *err = NULL;
1953 	struct commit_queue_entry *pentry;
1954 	int nscrolled = 0, ncommits_needed;
1955 
1956 	if (s->last_displayed_entry == NULL)
1957 		return NULL;
1958 
1959 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
1960 	if (s->commits.ncommits < ncommits_needed &&
1961 	    !s->thread_args.log_complete) {
1962 		/*
1963 		 * Ask the log thread for required amount of commits.
1964 		 */
1965 		s->thread_args.commits_needed += maxscroll;
1966 		err = trigger_log_thread(view, 1);
1967 		if (err)
1968 			return err;
1969 	}
1970 
1971 	do {
1972 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1973 		if (pentry == NULL)
1974 			break;
1975 
1976 		s->last_displayed_entry = pentry;
1977 
1978 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1979 		if (pentry == NULL)
1980 			break;
1981 		s->first_displayed_entry = pentry;
1982 	} while (++nscrolled < maxscroll);
1983 
1984 	return err;
1985 }
1986 
1987 static const struct got_error *
1988 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1989     struct got_commit_object *commit, struct got_object_id *commit_id,
1990     struct tog_view *log_view, struct got_repository *repo)
1991 {
1992 	const struct got_error *err;
1993 	struct got_object_qid *parent_id;
1994 	struct tog_view *diff_view;
1995 
1996 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1997 	if (diff_view == NULL)
1998 		return got_error_from_errno("view_open");
1999 
2000 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2001 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2002 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2003 	if (err == NULL)
2004 		*new_view = diff_view;
2005 	return err;
2006 }
2007 
2008 static const struct got_error *
2009 tree_view_visit_subtree(struct tog_tree_view_state *s,
2010     struct got_tree_object *subtree)
2011 {
2012 	struct tog_parent_tree *parent;
2013 
2014 	parent = calloc(1, sizeof(*parent));
2015 	if (parent == NULL)
2016 		return got_error_from_errno("calloc");
2017 
2018 	parent->tree = s->tree;
2019 	parent->first_displayed_entry = s->first_displayed_entry;
2020 	parent->selected_entry = s->selected_entry;
2021 	parent->selected = s->selected;
2022 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2023 	s->tree = subtree;
2024 	s->selected = 0;
2025 	s->first_displayed_entry = NULL;
2026 	return NULL;
2027 }
2028 
2029 static const struct got_error *
2030 tree_view_walk_path(struct tog_tree_view_state *s,
2031     struct got_commit_object *commit, const char *path)
2032 {
2033 	const struct got_error *err = NULL;
2034 	struct got_tree_object *tree = NULL;
2035 	const char *p;
2036 	char *slash, *subpath = NULL;
2037 
2038 	/* Walk the path and open corresponding tree objects. */
2039 	p = path;
2040 	while (*p) {
2041 		struct got_tree_entry *te;
2042 		struct got_object_id *tree_id;
2043 		char *te_name;
2044 
2045 		while (p[0] == '/')
2046 			p++;
2047 
2048 		/* Ensure the correct subtree entry is selected. */
2049 		slash = strchr(p, '/');
2050 		if (slash == NULL)
2051 			te_name = strdup(p);
2052 		else
2053 			te_name = strndup(p, slash - p);
2054 		if (te_name == NULL) {
2055 			err = got_error_from_errno("strndup");
2056 			break;
2057 		}
2058 		te = got_object_tree_find_entry(s->tree, te_name);
2059 		if (te == NULL) {
2060 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2061 			free(te_name);
2062 			break;
2063 		}
2064 		free(te_name);
2065 		s->first_displayed_entry = s->selected_entry = te;
2066 
2067 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2068 			break; /* jump to this file's entry */
2069 
2070 		slash = strchr(p, '/');
2071 		if (slash)
2072 			subpath = strndup(path, slash - path);
2073 		else
2074 			subpath = strdup(path);
2075 		if (subpath == NULL) {
2076 			err = got_error_from_errno("strdup");
2077 			break;
2078 		}
2079 
2080 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2081 		    subpath);
2082 		if (err)
2083 			break;
2084 
2085 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2086 		free(tree_id);
2087 		if (err)
2088 			break;
2089 
2090 		err = tree_view_visit_subtree(s, tree);
2091 		if (err) {
2092 			got_object_tree_close(tree);
2093 			break;
2094 		}
2095 		if (slash == NULL)
2096 			break;
2097 		free(subpath);
2098 		subpath = NULL;
2099 		p = slash;
2100 	}
2101 
2102 	free(subpath);
2103 	return err;
2104 }
2105 
2106 static const struct got_error *
2107 browse_commit_tree(struct tog_view **new_view, int begin_x,
2108     struct commit_queue_entry *entry, const char *path,
2109     const char *head_ref_name, struct got_repository *repo)
2110 {
2111 	const struct got_error *err = NULL;
2112 	struct tog_tree_view_state *s;
2113 	struct tog_view *tree_view;
2114 
2115 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
2116 	if (tree_view == NULL)
2117 		return got_error_from_errno("view_open");
2118 
2119 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2120 	if (err)
2121 		return err;
2122 	s = &tree_view->state.tree;
2123 
2124 	*new_view = tree_view;
2125 
2126 	if (got_path_is_root_dir(path))
2127 		return NULL;
2128 
2129 	return tree_view_walk_path(s, entry->commit, path);
2130 }
2131 
2132 static const struct got_error *
2133 block_signals_used_by_main_thread(void)
2134 {
2135 	sigset_t sigset;
2136 	int errcode;
2137 
2138 	if (sigemptyset(&sigset) == -1)
2139 		return got_error_from_errno("sigemptyset");
2140 
2141 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2142 	if (sigaddset(&sigset, SIGWINCH) == -1)
2143 		return got_error_from_errno("sigaddset");
2144 	if (sigaddset(&sigset, SIGCONT) == -1)
2145 		return got_error_from_errno("sigaddset");
2146 	if (sigaddset(&sigset, SIGINT) == -1)
2147 		return got_error_from_errno("sigaddset");
2148 	if (sigaddset(&sigset, SIGTERM) == -1)
2149 		return got_error_from_errno("sigaddset");
2150 
2151 	/* ncurses handles SIGTSTP */
2152 	if (sigaddset(&sigset, SIGTSTP) == -1)
2153 		return got_error_from_errno("sigaddset");
2154 
2155 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2156 	if (errcode)
2157 		return got_error_set_errno(errcode, "pthread_sigmask");
2158 
2159 	return NULL;
2160 }
2161 
2162 static void *
2163 log_thread(void *arg)
2164 {
2165 	const struct got_error *err = NULL;
2166 	int errcode = 0;
2167 	struct tog_log_thread_args *a = arg;
2168 	int done = 0;
2169 
2170 	err = block_signals_used_by_main_thread();
2171 	if (err)
2172 		return (void *)err;
2173 
2174 	while (!done && !err && !tog_fatal_signal_received()) {
2175 		err = queue_commits(a);
2176 		if (err) {
2177 			if (err->code != GOT_ERR_ITER_COMPLETED)
2178 				return (void *)err;
2179 			err = NULL;
2180 			done = 1;
2181 		} else if (a->commits_needed > 0 && !a->load_all)
2182 			a->commits_needed--;
2183 
2184 		errcode = pthread_mutex_lock(&tog_mutex);
2185 		if (errcode) {
2186 			err = got_error_set_errno(errcode,
2187 			    "pthread_mutex_lock");
2188 			break;
2189 		} else if (*a->quit)
2190 			done = 1;
2191 		else if (*a->first_displayed_entry == NULL) {
2192 			*a->first_displayed_entry =
2193 			    TAILQ_FIRST(&a->commits->head);
2194 			*a->selected_entry = *a->first_displayed_entry;
2195 		}
2196 
2197 		errcode = pthread_cond_signal(&a->commit_loaded);
2198 		if (errcode) {
2199 			err = got_error_set_errno(errcode,
2200 			    "pthread_cond_signal");
2201 			pthread_mutex_unlock(&tog_mutex);
2202 			break;
2203 		}
2204 
2205 		if (done)
2206 			a->commits_needed = 0;
2207 		else {
2208 			if (a->commits_needed == 0 && !a->load_all) {
2209 				errcode = pthread_cond_wait(&a->need_commits,
2210 				    &tog_mutex);
2211 				if (errcode)
2212 					err = got_error_set_errno(errcode,
2213 					    "pthread_cond_wait");
2214 				if (*a->quit)
2215 					done = 1;
2216 			}
2217 		}
2218 
2219 		errcode = pthread_mutex_unlock(&tog_mutex);
2220 		if (errcode && err == NULL)
2221 			err = got_error_set_errno(errcode,
2222 			    "pthread_mutex_unlock");
2223 	}
2224 	a->log_complete = 1;
2225 	return (void *)err;
2226 }
2227 
2228 static const struct got_error *
2229 stop_log_thread(struct tog_log_view_state *s)
2230 {
2231 	const struct got_error *err = NULL;
2232 	int errcode;
2233 
2234 	if (s->thread) {
2235 		s->quit = 1;
2236 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2237 		if (errcode)
2238 			return got_error_set_errno(errcode,
2239 			    "pthread_cond_signal");
2240 		errcode = pthread_mutex_unlock(&tog_mutex);
2241 		if (errcode)
2242 			return got_error_set_errno(errcode,
2243 			    "pthread_mutex_unlock");
2244 		errcode = pthread_join(s->thread, (void **)&err);
2245 		if (errcode)
2246 			return got_error_set_errno(errcode, "pthread_join");
2247 		errcode = pthread_mutex_lock(&tog_mutex);
2248 		if (errcode)
2249 			return got_error_set_errno(errcode,
2250 			    "pthread_mutex_lock");
2251 		s->thread = NULL;
2252 	}
2253 
2254 	if (s->thread_args.repo) {
2255 		err = got_repo_close(s->thread_args.repo);
2256 		s->thread_args.repo = NULL;
2257 	}
2258 
2259 	if (s->thread_args.pack_fds) {
2260 		const struct got_error *pack_err =
2261 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2262 		if (err == NULL)
2263 			err = pack_err;
2264 		s->thread_args.pack_fds = NULL;
2265 	}
2266 
2267 	if (s->thread_args.graph) {
2268 		got_commit_graph_close(s->thread_args.graph);
2269 		s->thread_args.graph = NULL;
2270 	}
2271 
2272 	return err;
2273 }
2274 
2275 static const struct got_error *
2276 close_log_view(struct tog_view *view)
2277 {
2278 	const struct got_error *err = NULL;
2279 	struct tog_log_view_state *s = &view->state.log;
2280 	int errcode;
2281 
2282 	err = stop_log_thread(s);
2283 
2284 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2285 	if (errcode && err == NULL)
2286 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2287 
2288 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2289 	if (errcode && err == NULL)
2290 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2291 
2292 	free_commits(&s->commits);
2293 	free(s->in_repo_path);
2294 	s->in_repo_path = NULL;
2295 	free(s->start_id);
2296 	s->start_id = NULL;
2297 	free(s->head_ref_name);
2298 	s->head_ref_name = NULL;
2299 	return err;
2300 }
2301 
2302 static const struct got_error *
2303 search_start_log_view(struct tog_view *view)
2304 {
2305 	struct tog_log_view_state *s = &view->state.log;
2306 
2307 	s->matched_entry = NULL;
2308 	s->search_entry = NULL;
2309 	return NULL;
2310 }
2311 
2312 static const struct got_error *
2313 search_next_log_view(struct tog_view *view)
2314 {
2315 	const struct got_error *err = NULL;
2316 	struct tog_log_view_state *s = &view->state.log;
2317 	struct commit_queue_entry *entry;
2318 
2319 	/* Display progress update in log view. */
2320 	show_log_view(view);
2321 	update_panels();
2322 	doupdate();
2323 
2324 	if (s->search_entry) {
2325 		int errcode, ch;
2326 		errcode = pthread_mutex_unlock(&tog_mutex);
2327 		if (errcode)
2328 			return got_error_set_errno(errcode,
2329 			    "pthread_mutex_unlock");
2330 		ch = wgetch(view->window);
2331 		errcode = pthread_mutex_lock(&tog_mutex);
2332 		if (errcode)
2333 			return got_error_set_errno(errcode,
2334 			    "pthread_mutex_lock");
2335 		if (ch == KEY_BACKSPACE) {
2336 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2337 			return NULL;
2338 		}
2339 		if (view->searching == TOG_SEARCH_FORWARD)
2340 			entry = TAILQ_NEXT(s->search_entry, entry);
2341 		else
2342 			entry = TAILQ_PREV(s->search_entry,
2343 			    commit_queue_head, entry);
2344 	} else if (s->matched_entry) {
2345 		if (view->searching == TOG_SEARCH_FORWARD)
2346 			entry = TAILQ_NEXT(s->matched_entry, entry);
2347 		else
2348 			entry = TAILQ_PREV(s->matched_entry,
2349 			    commit_queue_head, entry);
2350 	} else {
2351 		entry = s->selected_entry;
2352 	}
2353 
2354 	while (1) {
2355 		int have_match = 0;
2356 
2357 		if (entry == NULL) {
2358 			if (s->thread_args.log_complete ||
2359 			    view->searching == TOG_SEARCH_BACKWARD) {
2360 				view->search_next_done =
2361 				    (s->matched_entry == NULL ?
2362 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2363 				s->search_entry = NULL;
2364 				return NULL;
2365 			}
2366 			/*
2367 			 * Poke the log thread for more commits and return,
2368 			 * allowing the main loop to make progress. Search
2369 			 * will resume at s->search_entry once we come back.
2370 			 */
2371 			s->thread_args.commits_needed++;
2372 			return trigger_log_thread(view, 0);
2373 		}
2374 
2375 		err = match_commit(&have_match, entry->id, entry->commit,
2376 		    &view->regex);
2377 		if (err)
2378 			break;
2379 		if (have_match) {
2380 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2381 			s->matched_entry = entry;
2382 			break;
2383 		}
2384 
2385 		s->search_entry = entry;
2386 		if (view->searching == TOG_SEARCH_FORWARD)
2387 			entry = TAILQ_NEXT(entry, entry);
2388 		else
2389 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2390 	}
2391 
2392 	if (s->matched_entry) {
2393 		int cur = s->selected_entry->idx;
2394 		while (cur < s->matched_entry->idx) {
2395 			err = input_log_view(NULL, view, KEY_DOWN);
2396 			if (err)
2397 				return err;
2398 			cur++;
2399 		}
2400 		while (cur > s->matched_entry->idx) {
2401 			err = input_log_view(NULL, view, KEY_UP);
2402 			if (err)
2403 				return err;
2404 			cur--;
2405 		}
2406 	}
2407 
2408 	s->search_entry = NULL;
2409 
2410 	return NULL;
2411 }
2412 
2413 static const struct got_error *
2414 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2415     struct got_repository *repo, const char *head_ref_name,
2416     const char *in_repo_path, int log_branches)
2417 {
2418 	const struct got_error *err = NULL;
2419 	struct tog_log_view_state *s = &view->state.log;
2420 	struct got_repository *thread_repo = NULL;
2421 	struct got_commit_graph *thread_graph = NULL;
2422 	int errcode;
2423 
2424 	if (in_repo_path != s->in_repo_path) {
2425 		free(s->in_repo_path);
2426 		s->in_repo_path = strdup(in_repo_path);
2427 		if (s->in_repo_path == NULL)
2428 			return got_error_from_errno("strdup");
2429 	}
2430 
2431 	/* The commit queue only contains commits being displayed. */
2432 	TAILQ_INIT(&s->commits.head);
2433 	s->commits.ncommits = 0;
2434 
2435 	s->repo = repo;
2436 	if (head_ref_name) {
2437 		s->head_ref_name = strdup(head_ref_name);
2438 		if (s->head_ref_name == NULL) {
2439 			err = got_error_from_errno("strdup");
2440 			goto done;
2441 		}
2442 	}
2443 	s->start_id = got_object_id_dup(start_id);
2444 	if (s->start_id == NULL) {
2445 		err = got_error_from_errno("got_object_id_dup");
2446 		goto done;
2447 	}
2448 	s->log_branches = log_branches;
2449 
2450 	STAILQ_INIT(&s->colors);
2451 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2452 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2453 		    get_color_value("TOG_COLOR_COMMIT"));
2454 		if (err)
2455 			goto done;
2456 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2457 		    get_color_value("TOG_COLOR_AUTHOR"));
2458 		if (err) {
2459 			free_colors(&s->colors);
2460 			goto done;
2461 		}
2462 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2463 		    get_color_value("TOG_COLOR_DATE"));
2464 		if (err) {
2465 			free_colors(&s->colors);
2466 			goto done;
2467 		}
2468 	}
2469 
2470 	view->show = show_log_view;
2471 	view->input = input_log_view;
2472 	view->close = close_log_view;
2473 	view->search_start = search_start_log_view;
2474 	view->search_next = search_next_log_view;
2475 
2476 	if (s->thread_args.pack_fds == NULL) {
2477 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2478 		if (err)
2479 			goto done;
2480 	}
2481 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2482 	    s->thread_args.pack_fds);
2483 	if (err)
2484 		goto done;
2485 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2486 	    !s->log_branches);
2487 	if (err)
2488 		goto done;
2489 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2490 	    s->repo, NULL, NULL);
2491 	if (err)
2492 		goto done;
2493 
2494 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2495 	if (errcode) {
2496 		err = got_error_set_errno(errcode, "pthread_cond_init");
2497 		goto done;
2498 	}
2499 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2500 	if (errcode) {
2501 		err = got_error_set_errno(errcode, "pthread_cond_init");
2502 		goto done;
2503 	}
2504 
2505 	s->thread_args.commits_needed = view->nlines;
2506 	s->thread_args.graph = thread_graph;
2507 	s->thread_args.commits = &s->commits;
2508 	s->thread_args.in_repo_path = s->in_repo_path;
2509 	s->thread_args.start_id = s->start_id;
2510 	s->thread_args.repo = thread_repo;
2511 	s->thread_args.log_complete = 0;
2512 	s->thread_args.quit = &s->quit;
2513 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2514 	s->thread_args.selected_entry = &s->selected_entry;
2515 	s->thread_args.searching = &view->searching;
2516 	s->thread_args.search_next_done = &view->search_next_done;
2517 	s->thread_args.regex = &view->regex;
2518 done:
2519 	if (err)
2520 		close_log_view(view);
2521 	return err;
2522 }
2523 
2524 static const struct got_error *
2525 show_log_view(struct tog_view *view)
2526 {
2527 	const struct got_error *err;
2528 	struct tog_log_view_state *s = &view->state.log;
2529 
2530 	if (s->thread == NULL) {
2531 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2532 		    &s->thread_args);
2533 		if (errcode)
2534 			return got_error_set_errno(errcode, "pthread_create");
2535 		if (s->thread_args.commits_needed > 0) {
2536 			err = trigger_log_thread(view, 1);
2537 			if (err)
2538 				return err;
2539 		}
2540 	}
2541 
2542 	return draw_commits(view);
2543 }
2544 
2545 static const struct got_error *
2546 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2547 {
2548 	const struct got_error *err = NULL;
2549 	struct tog_log_view_state *s = &view->state.log;
2550 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2551 	struct tog_view *ref_view = NULL;
2552 	struct commit_queue_entry *entry;
2553 	int begin_x = 0, n, nscroll = view->nlines - 1;
2554 
2555 	if (s->thread_args.load_all) {
2556 		if (ch == KEY_BACKSPACE)
2557 			s->thread_args.load_all = 0;
2558 		else if (s->thread_args.log_complete) {
2559 			s->thread_args.load_all = 0;
2560 			log_scroll_down(view, s->commits.ncommits);
2561 			s->selected = MIN(view->nlines - 2,
2562 			    s->commits.ncommits - 1);
2563 			select_commit(s);
2564 		}
2565 		return NULL;
2566 	}
2567 
2568 	switch (ch) {
2569 	case 'q':
2570 		s->quit = 1;
2571 		break;
2572 	case '0':
2573 		view->x = 0;
2574 		break;
2575 	case '$':
2576 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2577 		break;
2578 	case KEY_RIGHT:
2579 	case 'l':
2580 		if (view->x + view->ncols / 2 < view->maxx)
2581 			view->x += 2;  /* move two columns right */
2582 		break;
2583 	case KEY_LEFT:
2584 	case 'h':
2585 		view->x -= MIN(view->x, 2);  /* move two columns back */
2586 		break;
2587 	case 'k':
2588 	case KEY_UP:
2589 	case '<':
2590 	case ',':
2591 	case CTRL('p'):
2592 		if (s->first_displayed_entry == NULL)
2593 			break;
2594 		if (s->selected > 0)
2595 			s->selected--;
2596 		else
2597 			log_scroll_up(s, 1);
2598 		select_commit(s);
2599 		break;
2600 	case 'g':
2601 	case KEY_HOME:
2602 		s->selected = 0;
2603 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2604 		select_commit(s);
2605 		break;
2606 	case CTRL('u'):
2607 	case 'u':
2608 		nscroll /= 2;
2609 		/* FALL THROUGH */
2610 	case KEY_PPAGE:
2611 	case CTRL('b'):
2612 		if (s->first_displayed_entry == NULL)
2613 			break;
2614 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2615 			s->selected = MAX(0, s->selected - nscroll - 1);
2616 		else
2617 			log_scroll_up(s, nscroll);
2618 		select_commit(s);
2619 		break;
2620 	case 'j':
2621 	case KEY_DOWN:
2622 	case '>':
2623 	case '.':
2624 	case CTRL('n'):
2625 		if (s->first_displayed_entry == NULL)
2626 			break;
2627 		if (s->selected < MIN(view->nlines - 2,
2628 		    s->commits.ncommits - 1))
2629 			s->selected++;
2630 		else {
2631 			err = log_scroll_down(view, 1);
2632 			if (err)
2633 				break;
2634 		}
2635 		select_commit(s);
2636 		break;
2637 	case 'G':
2638 	case KEY_END: {
2639 		/* We don't know yet how many commits, so we're forced to
2640 		 * traverse them all. */
2641 		if (!s->thread_args.log_complete) {
2642 			s->thread_args.load_all = 1;
2643 			return trigger_log_thread(view, 0);
2644 		}
2645 
2646 		s->selected = 0;
2647 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2648 		for (n = 0; n < view->nlines - 1; n++) {
2649 			if (entry == NULL)
2650 				break;
2651 			s->first_displayed_entry = entry;
2652 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2653 		}
2654 		if (n > 0)
2655 			s->selected = n - 1;
2656 		select_commit(s);
2657 		break;
2658 	}
2659 	case CTRL('d'):
2660 	case 'd':
2661 		nscroll /= 2;
2662 		/* FALL THROUGH */
2663 	case KEY_NPAGE:
2664 	case CTRL('f'): {
2665 		struct commit_queue_entry *first;
2666 		first = s->first_displayed_entry;
2667 		if (first == NULL)
2668 			break;
2669 		err = log_scroll_down(view, nscroll);
2670 		if (err)
2671 			break;
2672 		if (first == s->first_displayed_entry &&
2673 		    s->selected < MIN(view->nlines - 2,
2674 		    s->commits.ncommits - 1)) {
2675 			/* can't scroll further down */
2676 			s->selected += MIN(s->last_displayed_entry->idx -
2677 			    s->selected_entry->idx, nscroll + 1);
2678 		}
2679 		select_commit(s);
2680 		break;
2681 	}
2682 	case KEY_RESIZE:
2683 		if (s->selected > view->nlines - 2)
2684 			s->selected = view->nlines - 2;
2685 		if (s->selected > s->commits.ncommits - 1)
2686 			s->selected = s->commits.ncommits - 1;
2687 		select_commit(s);
2688 		if (s->commits.ncommits < view->nlines - 1 &&
2689 		    !s->thread_args.log_complete) {
2690 			s->thread_args.commits_needed += (view->nlines - 1) -
2691 			    s->commits.ncommits;
2692 			err = trigger_log_thread(view, 1);
2693 		}
2694 		break;
2695 	case KEY_ENTER:
2696 	case ' ':
2697 	case '\r':
2698 		if (s->selected_entry == NULL)
2699 			break;
2700 		if (view_is_parent_view(view))
2701 			begin_x = view_split_begin_x(view->begin_x);
2702 		err = open_diff_view_for_commit(&diff_view, begin_x,
2703 		    s->selected_entry->commit, s->selected_entry->id,
2704 		    view, s->repo);
2705 		if (err)
2706 			break;
2707 		view->focussed = 0;
2708 		diff_view->focussed = 1;
2709 		if (view_is_parent_view(view)) {
2710 			err = view_close_child(view);
2711 			if (err)
2712 				return err;
2713 			err = view_set_child(view, diff_view);
2714 			if (err)
2715 				return err;
2716 			view->focus_child = 1;
2717 		} else
2718 			*new_view = diff_view;
2719 		break;
2720 	case 't':
2721 		if (s->selected_entry == NULL)
2722 			break;
2723 		if (view_is_parent_view(view))
2724 			begin_x = view_split_begin_x(view->begin_x);
2725 		err = browse_commit_tree(&tree_view, begin_x,
2726 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2727 		    s->repo);
2728 		if (err)
2729 			break;
2730 		view->focussed = 0;
2731 		tree_view->focussed = 1;
2732 		if (view_is_parent_view(view)) {
2733 			err = view_close_child(view);
2734 			if (err)
2735 				return err;
2736 			err = view_set_child(view, tree_view);
2737 			if (err)
2738 				return err;
2739 			view->focus_child = 1;
2740 		} else
2741 			*new_view = tree_view;
2742 		break;
2743 	case KEY_BACKSPACE:
2744 	case CTRL('l'):
2745 	case 'B':
2746 		if (ch == KEY_BACKSPACE &&
2747 		    got_path_is_root_dir(s->in_repo_path))
2748 			break;
2749 		err = stop_log_thread(s);
2750 		if (err)
2751 			return err;
2752 		if (ch == KEY_BACKSPACE) {
2753 			char *parent_path;
2754 			err = got_path_dirname(&parent_path, s->in_repo_path);
2755 			if (err)
2756 				return err;
2757 			free(s->in_repo_path);
2758 			s->in_repo_path = parent_path;
2759 			s->thread_args.in_repo_path = s->in_repo_path;
2760 		} else if (ch == CTRL('l')) {
2761 			struct got_object_id *start_id;
2762 			err = got_repo_match_object_id(&start_id, NULL,
2763 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2764 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2765 			if (err)
2766 				return err;
2767 			free(s->start_id);
2768 			s->start_id = start_id;
2769 			s->thread_args.start_id = s->start_id;
2770 		} else /* 'B' */
2771 			s->log_branches = !s->log_branches;
2772 
2773 		if (s->thread_args.pack_fds == NULL) {
2774 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2775 			if (err)
2776 				return err;
2777 		}
2778 		err = got_repo_open(&s->thread_args.repo,
2779 		    got_repo_get_path(s->repo), NULL,
2780 		    s->thread_args.pack_fds);
2781 		if (err)
2782 			return err;
2783 		tog_free_refs();
2784 		err = tog_load_refs(s->repo, 0);
2785 		if (err)
2786 			return err;
2787 		err = got_commit_graph_open(&s->thread_args.graph,
2788 		    s->in_repo_path, !s->log_branches);
2789 		if (err)
2790 			return err;
2791 		err = got_commit_graph_iter_start(s->thread_args.graph,
2792 		    s->start_id, s->repo, NULL, NULL);
2793 		if (err)
2794 			return err;
2795 		free_commits(&s->commits);
2796 		s->first_displayed_entry = NULL;
2797 		s->last_displayed_entry = NULL;
2798 		s->selected_entry = NULL;
2799 		s->selected = 0;
2800 		s->thread_args.log_complete = 0;
2801 		s->quit = 0;
2802 		s->thread_args.commits_needed = view->nlines;
2803 		break;
2804 	case 'r':
2805 		if (view_is_parent_view(view))
2806 			begin_x = view_split_begin_x(view->begin_x);
2807 		ref_view = view_open(view->nlines, view->ncols,
2808 		    view->begin_y, begin_x, TOG_VIEW_REF);
2809 		if (ref_view == NULL)
2810 			return got_error_from_errno("view_open");
2811 		err = open_ref_view(ref_view, s->repo);
2812 		if (err) {
2813 			view_close(ref_view);
2814 			return err;
2815 		}
2816 		view->focussed = 0;
2817 		ref_view->focussed = 1;
2818 		if (view_is_parent_view(view)) {
2819 			err = view_close_child(view);
2820 			if (err)
2821 				return err;
2822 			err = view_set_child(view, ref_view);
2823 			if (err)
2824 				return err;
2825 			view->focus_child = 1;
2826 		} else
2827 			*new_view = ref_view;
2828 		break;
2829 	default:
2830 		break;
2831 	}
2832 
2833 	return err;
2834 }
2835 
2836 static const struct got_error *
2837 apply_unveil(const char *repo_path, const char *worktree_path)
2838 {
2839 	const struct got_error *error;
2840 
2841 #ifdef PROFILE
2842 	if (unveil("gmon.out", "rwc") != 0)
2843 		return got_error_from_errno2("unveil", "gmon.out");
2844 #endif
2845 	if (repo_path && unveil(repo_path, "r") != 0)
2846 		return got_error_from_errno2("unveil", repo_path);
2847 
2848 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2849 		return got_error_from_errno2("unveil", worktree_path);
2850 
2851 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2852 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2853 
2854 	error = got_privsep_unveil_exec_helpers();
2855 	if (error != NULL)
2856 		return error;
2857 
2858 	if (unveil(NULL, NULL) != 0)
2859 		return got_error_from_errno("unveil");
2860 
2861 	return NULL;
2862 }
2863 
2864 static void
2865 init_curses(void)
2866 {
2867 	/*
2868 	 * Override default signal handlers before starting ncurses.
2869 	 * This should prevent ncurses from installing its own
2870 	 * broken cleanup() signal handler.
2871 	 */
2872 	signal(SIGWINCH, tog_sigwinch);
2873 	signal(SIGPIPE, tog_sigpipe);
2874 	signal(SIGCONT, tog_sigcont);
2875 	signal(SIGINT, tog_sigint);
2876 	signal(SIGTERM, tog_sigterm);
2877 
2878 	initscr();
2879 	cbreak();
2880 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2881 	noecho();
2882 	nonl();
2883 	intrflush(stdscr, FALSE);
2884 	keypad(stdscr, TRUE);
2885 	curs_set(0);
2886 	if (getenv("TOG_COLORS") != NULL) {
2887 		start_color();
2888 		use_default_colors();
2889 	}
2890 }
2891 
2892 static const struct got_error *
2893 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2894     struct got_repository *repo, struct got_worktree *worktree)
2895 {
2896 	const struct got_error *err = NULL;
2897 
2898 	if (argc == 0) {
2899 		*in_repo_path = strdup("/");
2900 		if (*in_repo_path == NULL)
2901 			return got_error_from_errno("strdup");
2902 		return NULL;
2903 	}
2904 
2905 	if (worktree) {
2906 		const char *prefix = got_worktree_get_path_prefix(worktree);
2907 		char *p;
2908 
2909 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2910 		if (err)
2911 			return err;
2912 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2913 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2914 		    p) == -1) {
2915 			err = got_error_from_errno("asprintf");
2916 			*in_repo_path = NULL;
2917 		}
2918 		free(p);
2919 	} else
2920 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2921 
2922 	return err;
2923 }
2924 
2925 static const struct got_error *
2926 cmd_log(int argc, char *argv[])
2927 {
2928 	const struct got_error *error;
2929 	struct got_repository *repo = NULL;
2930 	struct got_worktree *worktree = NULL;
2931 	struct got_object_id *start_id = NULL;
2932 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2933 	char *start_commit = NULL, *label = NULL;
2934 	struct got_reference *ref = NULL;
2935 	const char *head_ref_name = NULL;
2936 	int ch, log_branches = 0;
2937 	struct tog_view *view;
2938 	int *pack_fds = NULL;
2939 
2940 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2941 		switch (ch) {
2942 		case 'b':
2943 			log_branches = 1;
2944 			break;
2945 		case 'c':
2946 			start_commit = optarg;
2947 			break;
2948 		case 'r':
2949 			repo_path = realpath(optarg, NULL);
2950 			if (repo_path == NULL)
2951 				return got_error_from_errno2("realpath",
2952 				    optarg);
2953 			break;
2954 		default:
2955 			usage_log();
2956 			/* NOTREACHED */
2957 		}
2958 	}
2959 
2960 	argc -= optind;
2961 	argv += optind;
2962 
2963 	if (argc > 1)
2964 		usage_log();
2965 
2966 	error = got_repo_pack_fds_open(&pack_fds);
2967 	if (error != NULL)
2968 		goto done;
2969 
2970 	if (repo_path == NULL) {
2971 		cwd = getcwd(NULL, 0);
2972 		if (cwd == NULL)
2973 			return got_error_from_errno("getcwd");
2974 		error = got_worktree_open(&worktree, cwd);
2975 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2976 			goto done;
2977 		if (worktree)
2978 			repo_path =
2979 			    strdup(got_worktree_get_repo_path(worktree));
2980 		else
2981 			repo_path = strdup(cwd);
2982 		if (repo_path == NULL) {
2983 			error = got_error_from_errno("strdup");
2984 			goto done;
2985 		}
2986 	}
2987 
2988 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
2989 	if (error != NULL)
2990 		goto done;
2991 
2992 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
2993 	    repo, worktree);
2994 	if (error)
2995 		goto done;
2996 
2997 	init_curses();
2998 
2999 	error = apply_unveil(got_repo_get_path(repo),
3000 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3001 	if (error)
3002 		goto done;
3003 
3004 	/* already loaded by tog_log_with_path()? */
3005 	if (TAILQ_EMPTY(&tog_refs)) {
3006 		error = tog_load_refs(repo, 0);
3007 		if (error)
3008 			goto done;
3009 	}
3010 
3011 	if (start_commit == NULL) {
3012 		error = got_repo_match_object_id(&start_id, &label,
3013 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3014 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3015 		if (error)
3016 			goto done;
3017 		head_ref_name = label;
3018 	} else {
3019 		error = got_ref_open(&ref, repo, start_commit, 0);
3020 		if (error == NULL)
3021 			head_ref_name = got_ref_get_name(ref);
3022 		else if (error->code != GOT_ERR_NOT_REF)
3023 			goto done;
3024 		error = got_repo_match_object_id(&start_id, NULL,
3025 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3026 		if (error)
3027 			goto done;
3028 	}
3029 
3030 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3031 	if (view == NULL) {
3032 		error = got_error_from_errno("view_open");
3033 		goto done;
3034 	}
3035 	error = open_log_view(view, start_id, repo, head_ref_name,
3036 	    in_repo_path, log_branches);
3037 	if (error)
3038 		goto done;
3039 	if (worktree) {
3040 		/* Release work tree lock. */
3041 		got_worktree_close(worktree);
3042 		worktree = NULL;
3043 	}
3044 	error = view_loop(view);
3045 done:
3046 	free(in_repo_path);
3047 	free(repo_path);
3048 	free(cwd);
3049 	free(start_id);
3050 	free(label);
3051 	if (ref)
3052 		got_ref_close(ref);
3053 	if (repo) {
3054 		const struct got_error *close_err = got_repo_close(repo);
3055 		if (error == NULL)
3056 			error = close_err;
3057 	}
3058 	if (worktree)
3059 		got_worktree_close(worktree);
3060 	if (pack_fds) {
3061 		const struct got_error *pack_err =
3062 		    got_repo_pack_fds_close(pack_fds);
3063 		if (error == NULL)
3064 			error = pack_err;
3065 	}
3066 	tog_free_refs();
3067 	return error;
3068 }
3069 
3070 __dead static void
3071 usage_diff(void)
3072 {
3073 	endwin();
3074 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3075 	    "[-w] object1 object2\n", getprogname());
3076 	exit(1);
3077 }
3078 
3079 static int
3080 match_line(const char *line, regex_t *regex, size_t nmatch,
3081     regmatch_t *regmatch)
3082 {
3083 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3084 }
3085 
3086 struct tog_color *
3087 match_color(struct tog_colors *colors, const char *line)
3088 {
3089 	struct tog_color *tc = NULL;
3090 
3091 	STAILQ_FOREACH(tc, colors, entry) {
3092 		if (match_line(line, &tc->regex, 0, NULL))
3093 			return tc;
3094 	}
3095 
3096 	return NULL;
3097 }
3098 
3099 static const struct got_error *
3100 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3101     WINDOW *window, int skipcol, regmatch_t *regmatch)
3102 {
3103 	const struct got_error *err = NULL;
3104 	char *exstr = NULL;
3105 	wchar_t *wline = NULL;
3106 	int rme, rms, n, width, scrollx;
3107 	int width0 = 0, width1 = 0, width2 = 0;
3108 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3109 
3110 	*wtotal = 0;
3111 
3112 	rms = regmatch->rm_so;
3113 	rme = regmatch->rm_eo;
3114 
3115 	err = expand_tab(&exstr, line);
3116 	if (err)
3117 		return err;
3118 
3119 	/* Split the line into 3 segments, according to match offsets. */
3120 	seg0 = strndup(exstr, rms);
3121 	if (seg0 == NULL) {
3122 		err = got_error_from_errno("strndup");
3123 		goto done;
3124 	}
3125 	seg1 = strndup(exstr + rms, rme - rms);
3126 	if (seg1 == NULL) {
3127 		err = got_error_from_errno("strndup");
3128 		goto done;
3129 	}
3130 	seg2 = strdup(exstr + rme);
3131 	if (seg2 == NULL) {
3132 		err = got_error_from_errno("strndup");
3133 		goto done;
3134 	}
3135 
3136 	/* draw up to matched token if we haven't scrolled past it */
3137 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3138 	    col_tab_align, 1);
3139 	if (err)
3140 		goto done;
3141 	n = MAX(width0 - skipcol, 0);
3142 	if (n) {
3143 		free(wline);
3144 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3145 		    wlimit, col_tab_align, 1);
3146 		if (err)
3147 			goto done;
3148 		waddwstr(window, &wline[scrollx]);
3149 		wlimit -= width;
3150 		*wtotal += width;
3151 	}
3152 
3153 	if (wlimit > 0) {
3154 		int i = 0, w = 0;
3155 		size_t wlen;
3156 
3157 		free(wline);
3158 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3159 		    col_tab_align, 1);
3160 		if (err)
3161 			goto done;
3162 		wlen = wcslen(wline);
3163 		while (i < wlen) {
3164 			width = wcwidth(wline[i]);
3165 			if (width == -1) {
3166 				/* should not happen, tabs are expanded */
3167 				err = got_error(GOT_ERR_RANGE);
3168 				goto done;
3169 			}
3170 			if (width0 + w + width > skipcol)
3171 				break;
3172 			w += width; 
3173 			i++;
3174 		}
3175 		/* draw (visible part of) matched token (if scrolled into it) */
3176 		if (width1 - w > 0) {
3177 			wattron(window, A_STANDOUT);
3178 			waddwstr(window, &wline[i]);
3179 			wattroff(window, A_STANDOUT);
3180 			wlimit -= (width1 - w);
3181 			*wtotal += (width1 - w);
3182 		}
3183 	}
3184 
3185 	if (wlimit > 0) {  /* draw rest of line */
3186 		free(wline);
3187 		if (skipcol > width0 + width1) {
3188 			err = format_line(&wline, &width2, &scrollx, seg2,
3189 			    skipcol - (width0 + width1), wlimit,
3190 			    col_tab_align, 1);
3191 			if (err)
3192 				goto done;
3193 			waddwstr(window, &wline[scrollx]);
3194 		} else {
3195 			err = format_line(&wline, &width2, NULL, seg2, 0,
3196 			    wlimit, col_tab_align, 1);
3197 			if (err)
3198 				goto done;
3199 			waddwstr(window, wline);
3200 		}
3201 		*wtotal += width2;
3202 	}
3203 done:
3204 	free(wline);
3205 	free(exstr);
3206 	free(seg0);
3207 	free(seg1);
3208 	free(seg2);
3209 	return err;
3210 }
3211 
3212 static const struct got_error *
3213 draw_file(struct tog_view *view, const char *header)
3214 {
3215 	struct tog_diff_view_state *s = &view->state.diff;
3216 	regmatch_t *regmatch = &view->regmatch;
3217 	const struct got_error *err;
3218 	int nprinted = 0;
3219 	char *line;
3220 	size_t linesize = 0;
3221 	ssize_t linelen;
3222 	struct tog_color *tc;
3223 	wchar_t *wline;
3224 	int width;
3225 	int max_lines = view->nlines;
3226 	int nlines = s->nlines;
3227 	off_t line_offset;
3228 
3229 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3230 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3231 		return got_error_from_errno("fseek");
3232 
3233 	werase(view->window);
3234 
3235 	if (header) {
3236 		if (asprintf(&line, "[%d/%d] %s",
3237 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3238 		    header) == -1)
3239 			return got_error_from_errno("asprintf");
3240 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3241 		    0, 0);
3242 		free(line);
3243 		if (err)
3244 			return err;
3245 
3246 		if (view_needs_focus_indication(view))
3247 			wstandout(view->window);
3248 		waddwstr(view->window, wline);
3249 		free(wline);
3250 		wline = NULL;
3251 		if (view_needs_focus_indication(view))
3252 			wstandend(view->window);
3253 		if (width <= view->ncols - 1)
3254 			waddch(view->window, '\n');
3255 
3256 		if (max_lines <= 1)
3257 			return NULL;
3258 		max_lines--;
3259 	}
3260 
3261 	s->eof = 0;
3262 	view->maxx = 0;
3263 	line = NULL;
3264 	while (max_lines > 0 && nprinted < max_lines) {
3265 		linelen = getline(&line, &linesize, s->f);
3266 		if (linelen == -1) {
3267 			if (feof(s->f)) {
3268 				s->eof = 1;
3269 				break;
3270 			}
3271 			free(line);
3272 			return got_ferror(s->f, GOT_ERR_IO);
3273 		}
3274 
3275 		/* Set view->maxx based on full line length. */
3276 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3277 		    view->x ? 1 : 0);
3278 		if (err) {
3279 			free(line);
3280 			return err;
3281 		}
3282 		view->maxx = MAX(view->maxx, width);
3283 		free(wline);
3284 		wline = NULL;
3285 
3286 		tc = match_color(&s->colors, line);
3287 		if (tc)
3288 			wattr_on(view->window,
3289 			    COLOR_PAIR(tc->colorpair), NULL);
3290 		if (s->first_displayed_line + nprinted == s->matched_line &&
3291 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3292 			err = add_matched_line(&width, line, view->ncols, 0,
3293 			    view->window, view->x, regmatch);
3294 			if (err) {
3295 				free(line);
3296 				return err;
3297 			}
3298 		} else {
3299 			int skip;
3300 			err = format_line(&wline, &width, &skip, line,
3301 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3302 			if (err) {
3303 				free(line);
3304 				return err;
3305 			}
3306 			waddwstr(view->window, &wline[skip]);
3307 			free(wline);
3308 			wline = NULL;
3309 		}
3310 		if (tc)
3311 			wattr_off(view->window,
3312 			    COLOR_PAIR(tc->colorpair), NULL);
3313 		if (width <= view->ncols - 1)
3314 			waddch(view->window, '\n');
3315 		nprinted++;
3316 	}
3317 	free(line);
3318 	if (nprinted >= 1)
3319 		s->last_displayed_line = s->first_displayed_line +
3320 		    (nprinted - 1);
3321 	else
3322 		s->last_displayed_line = s->first_displayed_line;
3323 
3324 	view_vborder(view);
3325 
3326 	if (s->eof) {
3327 		while (nprinted < view->nlines) {
3328 			waddch(view->window, '\n');
3329 			nprinted++;
3330 		}
3331 
3332 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3333 		    view->ncols, 0, 0);
3334 		if (err) {
3335 			return err;
3336 		}
3337 
3338 		wstandout(view->window);
3339 		waddwstr(view->window, wline);
3340 		free(wline);
3341 		wline = NULL;
3342 		wstandend(view->window);
3343 	}
3344 
3345 	return NULL;
3346 }
3347 
3348 static char *
3349 get_datestr(time_t *time, char *datebuf)
3350 {
3351 	struct tm mytm, *tm;
3352 	char *p, *s;
3353 
3354 	tm = gmtime_r(time, &mytm);
3355 	if (tm == NULL)
3356 		return NULL;
3357 	s = asctime_r(tm, datebuf);
3358 	if (s == NULL)
3359 		return NULL;
3360 	p = strchr(s, '\n');
3361 	if (p)
3362 		*p = '\0';
3363 	return s;
3364 }
3365 
3366 static const struct got_error *
3367 get_changed_paths(struct got_pathlist_head *paths,
3368     struct got_commit_object *commit, struct got_repository *repo)
3369 {
3370 	const struct got_error *err = NULL;
3371 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3372 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3373 	struct got_object_qid *qid;
3374 
3375 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3376 	if (qid != NULL) {
3377 		struct got_commit_object *pcommit;
3378 		err = got_object_open_as_commit(&pcommit, repo,
3379 		    &qid->id);
3380 		if (err)
3381 			return err;
3382 
3383 		tree_id1 = got_object_id_dup(
3384 		    got_object_commit_get_tree_id(pcommit));
3385 		if (tree_id1 == NULL) {
3386 			got_object_commit_close(pcommit);
3387 			return got_error_from_errno("got_object_id_dup");
3388 		}
3389 		got_object_commit_close(pcommit);
3390 
3391 	}
3392 
3393 	if (tree_id1) {
3394 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3395 		if (err)
3396 			goto done;
3397 	}
3398 
3399 	tree_id2 = got_object_commit_get_tree_id(commit);
3400 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3401 	if (err)
3402 		goto done;
3403 
3404 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3405 	    got_diff_tree_collect_changed_paths, paths, 0);
3406 done:
3407 	if (tree1)
3408 		got_object_tree_close(tree1);
3409 	if (tree2)
3410 		got_object_tree_close(tree2);
3411 	free(tree_id1);
3412 	return err;
3413 }
3414 
3415 static const struct got_error *
3416 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3417 {
3418 	off_t *p;
3419 
3420 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3421 	if (p == NULL)
3422 		return got_error_from_errno("reallocarray");
3423 	*line_offsets = p;
3424 	(*line_offsets)[*nlines] = off;
3425 	(*nlines)++;
3426 	return NULL;
3427 }
3428 
3429 static const struct got_error *
3430 write_commit_info(off_t **line_offsets, size_t *nlines,
3431     struct got_object_id *commit_id, struct got_reflist_head *refs,
3432     struct got_repository *repo, FILE *outfile)
3433 {
3434 	const struct got_error *err = NULL;
3435 	char datebuf[26], *datestr;
3436 	struct got_commit_object *commit;
3437 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3438 	time_t committer_time;
3439 	const char *author, *committer;
3440 	char *refs_str = NULL;
3441 	struct got_pathlist_head changed_paths;
3442 	struct got_pathlist_entry *pe;
3443 	off_t outoff = 0;
3444 	int n;
3445 
3446 	TAILQ_INIT(&changed_paths);
3447 
3448 	if (refs) {
3449 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3450 		if (err)
3451 			return err;
3452 	}
3453 
3454 	err = got_object_open_as_commit(&commit, repo, commit_id);
3455 	if (err)
3456 		return err;
3457 
3458 	err = got_object_id_str(&id_str, commit_id);
3459 	if (err) {
3460 		err = got_error_from_errno("got_object_id_str");
3461 		goto done;
3462 	}
3463 
3464 	err = add_line_offset(line_offsets, nlines, 0);
3465 	if (err)
3466 		goto done;
3467 
3468 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3469 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3470 	if (n < 0) {
3471 		err = got_error_from_errno("fprintf");
3472 		goto done;
3473 	}
3474 	outoff += n;
3475 	err = add_line_offset(line_offsets, nlines, outoff);
3476 	if (err)
3477 		goto done;
3478 
3479 	n = fprintf(outfile, "from: %s\n",
3480 	    got_object_commit_get_author(commit));
3481 	if (n < 0) {
3482 		err = got_error_from_errno("fprintf");
3483 		goto done;
3484 	}
3485 	outoff += n;
3486 	err = add_line_offset(line_offsets, nlines, outoff);
3487 	if (err)
3488 		goto done;
3489 
3490 	committer_time = got_object_commit_get_committer_time(commit);
3491 	datestr = get_datestr(&committer_time, datebuf);
3492 	if (datestr) {
3493 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3494 		if (n < 0) {
3495 			err = got_error_from_errno("fprintf");
3496 			goto done;
3497 		}
3498 		outoff += n;
3499 		err = add_line_offset(line_offsets, nlines, outoff);
3500 		if (err)
3501 			goto done;
3502 	}
3503 	author = got_object_commit_get_author(commit);
3504 	committer = got_object_commit_get_committer(commit);
3505 	if (strcmp(author, committer) != 0) {
3506 		n = fprintf(outfile, "via: %s\n", committer);
3507 		if (n < 0) {
3508 			err = got_error_from_errno("fprintf");
3509 			goto done;
3510 		}
3511 		outoff += n;
3512 		err = add_line_offset(line_offsets, nlines, outoff);
3513 		if (err)
3514 			goto done;
3515 	}
3516 	if (got_object_commit_get_nparents(commit) > 1) {
3517 		const struct got_object_id_queue *parent_ids;
3518 		struct got_object_qid *qid;
3519 		int pn = 1;
3520 		parent_ids = got_object_commit_get_parent_ids(commit);
3521 		STAILQ_FOREACH(qid, parent_ids, entry) {
3522 			err = got_object_id_str(&id_str, &qid->id);
3523 			if (err)
3524 				goto done;
3525 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3526 			if (n < 0) {
3527 				err = got_error_from_errno("fprintf");
3528 				goto done;
3529 			}
3530 			outoff += n;
3531 			err = add_line_offset(line_offsets, nlines, outoff);
3532 			if (err)
3533 				goto done;
3534 			free(id_str);
3535 			id_str = NULL;
3536 		}
3537 	}
3538 
3539 	err = got_object_commit_get_logmsg(&logmsg, commit);
3540 	if (err)
3541 		goto done;
3542 	s = logmsg;
3543 	while ((line = strsep(&s, "\n")) != NULL) {
3544 		n = fprintf(outfile, "%s\n", line);
3545 		if (n < 0) {
3546 			err = got_error_from_errno("fprintf");
3547 			goto done;
3548 		}
3549 		outoff += n;
3550 		err = add_line_offset(line_offsets, nlines, outoff);
3551 		if (err)
3552 			goto done;
3553 	}
3554 
3555 	err = get_changed_paths(&changed_paths, commit, repo);
3556 	if (err)
3557 		goto done;
3558 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3559 		struct got_diff_changed_path *cp = pe->data;
3560 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3561 		if (n < 0) {
3562 			err = got_error_from_errno("fprintf");
3563 			goto done;
3564 		}
3565 		outoff += n;
3566 		err = add_line_offset(line_offsets, nlines, outoff);
3567 		if (err)
3568 			goto done;
3569 		free((char *)pe->path);
3570 		free(pe->data);
3571 	}
3572 
3573 	fputc('\n', outfile);
3574 	outoff++;
3575 	err = add_line_offset(line_offsets, nlines, outoff);
3576 done:
3577 	got_pathlist_free(&changed_paths);
3578 	free(id_str);
3579 	free(logmsg);
3580 	free(refs_str);
3581 	got_object_commit_close(commit);
3582 	if (err) {
3583 		free(*line_offsets);
3584 		*line_offsets = NULL;
3585 		*nlines = 0;
3586 	}
3587 	return err;
3588 }
3589 
3590 static const struct got_error *
3591 create_diff(struct tog_diff_view_state *s)
3592 {
3593 	const struct got_error *err = NULL;
3594 	FILE *f = NULL;
3595 	int obj_type;
3596 
3597 	free(s->line_offsets);
3598 	s->line_offsets = malloc(sizeof(off_t));
3599 	if (s->line_offsets == NULL)
3600 		return got_error_from_errno("malloc");
3601 	s->nlines = 0;
3602 
3603 	f = got_opentemp();
3604 	if (f == NULL) {
3605 		err = got_error_from_errno("got_opentemp");
3606 		goto done;
3607 	}
3608 	if (s->f && fclose(s->f) == EOF) {
3609 		err = got_error_from_errno("fclose");
3610 		goto done;
3611 	}
3612 	s->f = f;
3613 
3614 	if (s->id1)
3615 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3616 	else
3617 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3618 	if (err)
3619 		goto done;
3620 
3621 	switch (obj_type) {
3622 	case GOT_OBJ_TYPE_BLOB:
3623 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3624 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3625 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3626 		    s->repo, s->f);
3627 		break;
3628 	case GOT_OBJ_TYPE_TREE:
3629 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3630 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3631 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3632 		break;
3633 	case GOT_OBJ_TYPE_COMMIT: {
3634 		const struct got_object_id_queue *parent_ids;
3635 		struct got_object_qid *pid;
3636 		struct got_commit_object *commit2;
3637 		struct got_reflist_head *refs;
3638 
3639 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3640 		if (err)
3641 			goto done;
3642 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3643 		/* Show commit info if we're diffing to a parent/root commit. */
3644 		if (s->id1 == NULL) {
3645 			err = write_commit_info(&s->line_offsets, &s->nlines,
3646 			    s->id2, refs, s->repo, s->f);
3647 			if (err)
3648 				goto done;
3649 		} else {
3650 			parent_ids = got_object_commit_get_parent_ids(commit2);
3651 			STAILQ_FOREACH(pid, parent_ids, entry) {
3652 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3653 					err = write_commit_info(
3654 					    &s->line_offsets, &s->nlines,
3655 					    s->id2, refs, s->repo, s->f);
3656 					if (err)
3657 						goto done;
3658 					break;
3659 				}
3660 			}
3661 		}
3662 		got_object_commit_close(commit2);
3663 
3664 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3665 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3666 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3667 		break;
3668 	}
3669 	default:
3670 		err = got_error(GOT_ERR_OBJ_TYPE);
3671 		break;
3672 	}
3673 	if (err)
3674 		goto done;
3675 done:
3676 	if (s->f && fflush(s->f) != 0 && err == NULL)
3677 		err = got_error_from_errno("fflush");
3678 	return err;
3679 }
3680 
3681 static void
3682 diff_view_indicate_progress(struct tog_view *view)
3683 {
3684 	mvwaddstr(view->window, 0, 0, "diffing...");
3685 	update_panels();
3686 	doupdate();
3687 }
3688 
3689 static const struct got_error *
3690 search_start_diff_view(struct tog_view *view)
3691 {
3692 	struct tog_diff_view_state *s = &view->state.diff;
3693 
3694 	s->matched_line = 0;
3695 	return NULL;
3696 }
3697 
3698 static const struct got_error *
3699 search_next_diff_view(struct tog_view *view)
3700 {
3701 	struct tog_diff_view_state *s = &view->state.diff;
3702 	const struct got_error *err = NULL;
3703 	int lineno;
3704 	char *line = NULL;
3705 	size_t linesize = 0;
3706 	ssize_t linelen;
3707 
3708 	if (!view->searching) {
3709 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3710 		return NULL;
3711 	}
3712 
3713 	if (s->matched_line) {
3714 		if (view->searching == TOG_SEARCH_FORWARD)
3715 			lineno = s->matched_line + 1;
3716 		else
3717 			lineno = s->matched_line - 1;
3718 	} else
3719 		lineno = s->first_displayed_line;
3720 
3721 	while (1) {
3722 		off_t offset;
3723 
3724 		if (lineno <= 0 || lineno > s->nlines) {
3725 			if (s->matched_line == 0) {
3726 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3727 				break;
3728 			}
3729 
3730 			if (view->searching == TOG_SEARCH_FORWARD)
3731 				lineno = 1;
3732 			else
3733 				lineno = s->nlines;
3734 		}
3735 
3736 		offset = s->line_offsets[lineno - 1];
3737 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3738 			free(line);
3739 			return got_error_from_errno("fseeko");
3740 		}
3741 		linelen = getline(&line, &linesize, s->f);
3742 		if (linelen != -1) {
3743 			char *exstr;
3744 			err = expand_tab(&exstr, line);
3745 			if (err)
3746 				break;
3747 			if (match_line(exstr, &view->regex, 1,
3748 			    &view->regmatch)) {
3749 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3750 				s->matched_line = lineno;
3751 				free(exstr);
3752 				break;
3753 			}
3754 			free(exstr);
3755 		}
3756 		if (view->searching == TOG_SEARCH_FORWARD)
3757 			lineno++;
3758 		else
3759 			lineno--;
3760 	}
3761 	free(line);
3762 
3763 	if (s->matched_line) {
3764 		s->first_displayed_line = s->matched_line;
3765 		s->selected_line = 1;
3766 	}
3767 
3768 	return err;
3769 }
3770 
3771 static const struct got_error *
3772 close_diff_view(struct tog_view *view)
3773 {
3774 	const struct got_error *err = NULL;
3775 	struct tog_diff_view_state *s = &view->state.diff;
3776 
3777 	free(s->id1);
3778 	s->id1 = NULL;
3779 	free(s->id2);
3780 	s->id2 = NULL;
3781 	if (s->f && fclose(s->f) == EOF)
3782 		err = got_error_from_errno("fclose");
3783 	s->f = NULL;
3784 	if (s->f1 && fclose(s->f1) == EOF)
3785 		err = got_error_from_errno("fclose");
3786 	s->f1 = NULL;
3787 	if (s->f2 && fclose(s->f2) == EOF)
3788 		err = got_error_from_errno("fclose");
3789 	s->f2 = NULL;
3790 	free_colors(&s->colors);
3791 	free(s->line_offsets);
3792 	s->line_offsets = NULL;
3793 	s->nlines = 0;
3794 	return err;
3795 }
3796 
3797 static const struct got_error *
3798 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3799     struct got_object_id *id2, const char *label1, const char *label2,
3800     int diff_context, int ignore_whitespace, int force_text_diff,
3801     struct tog_view *log_view, struct got_repository *repo)
3802 {
3803 	const struct got_error *err;
3804 	struct tog_diff_view_state *s = &view->state.diff;
3805 
3806 	memset(s, 0, sizeof(*s));
3807 
3808 	if (id1 != NULL && id2 != NULL) {
3809 	    int type1, type2;
3810 	    err = got_object_get_type(&type1, repo, id1);
3811 	    if (err)
3812 		return err;
3813 	    err = got_object_get_type(&type2, repo, id2);
3814 	    if (err)
3815 		return err;
3816 
3817 	    if (type1 != type2)
3818 		return got_error(GOT_ERR_OBJ_TYPE);
3819 	}
3820 	s->first_displayed_line = 1;
3821 	s->last_displayed_line = view->nlines;
3822 	s->selected_line = 1;
3823 	s->repo = repo;
3824 	s->id1 = id1;
3825 	s->id2 = id2;
3826 	s->label1 = label1;
3827 	s->label2 = label2;
3828 
3829 	if (id1) {
3830 		s->id1 = got_object_id_dup(id1);
3831 		if (s->id1 == NULL)
3832 			return got_error_from_errno("got_object_id_dup");
3833 	} else
3834 		s->id1 = NULL;
3835 
3836 	s->id2 = got_object_id_dup(id2);
3837 	if (s->id2 == NULL) {
3838 		err = got_error_from_errno("got_object_id_dup");
3839 		goto done;
3840 	}
3841 
3842 	s->f1 = got_opentemp();
3843 	if (s->f1 == NULL) {
3844 		err = got_error_from_errno("got_opentemp");
3845 		goto done;
3846 	}
3847 
3848 	s->f2 = got_opentemp();
3849 	if (s->f2 == NULL) {
3850 		err = got_error_from_errno("got_opentemp");
3851 		goto done;
3852 	}
3853 
3854 	s->first_displayed_line = 1;
3855 	s->last_displayed_line = view->nlines;
3856 	s->diff_context = diff_context;
3857 	s->ignore_whitespace = ignore_whitespace;
3858 	s->force_text_diff = force_text_diff;
3859 	s->log_view = log_view;
3860 	s->repo = repo;
3861 
3862 	STAILQ_INIT(&s->colors);
3863 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3864 		err = add_color(&s->colors,
3865 		    "^-", TOG_COLOR_DIFF_MINUS,
3866 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3867 		if (err)
3868 			goto done;
3869 		err = add_color(&s->colors, "^\\+",
3870 		    TOG_COLOR_DIFF_PLUS,
3871 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3872 		if (err)
3873 			goto done;
3874 		err = add_color(&s->colors,
3875 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3876 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3877 		if (err)
3878 			goto done;
3879 
3880 		err = add_color(&s->colors,
3881 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3882 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3883 		    get_color_value("TOG_COLOR_DIFF_META"));
3884 		if (err)
3885 			goto done;
3886 
3887 		err = add_color(&s->colors,
3888 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3889 		    get_color_value("TOG_COLOR_AUTHOR"));
3890 		if (err)
3891 			goto done;
3892 
3893 		err = add_color(&s->colors,
3894 		    "^date: ", TOG_COLOR_DATE,
3895 		    get_color_value("TOG_COLOR_DATE"));
3896 		if (err)
3897 			goto done;
3898 	}
3899 
3900 	if (log_view && view_is_splitscreen(view))
3901 		show_log_view(log_view); /* draw vborder */
3902 	diff_view_indicate_progress(view);
3903 
3904 	err = create_diff(s);
3905 
3906 	view->show = show_diff_view;
3907 	view->input = input_diff_view;
3908 	view->close = close_diff_view;
3909 	view->search_start = search_start_diff_view;
3910 	view->search_next = search_next_diff_view;
3911 done:
3912 	if (err)
3913 		close_diff_view(view);
3914 	return err;
3915 }
3916 
3917 static const struct got_error *
3918 show_diff_view(struct tog_view *view)
3919 {
3920 	const struct got_error *err;
3921 	struct tog_diff_view_state *s = &view->state.diff;
3922 	char *id_str1 = NULL, *id_str2, *header;
3923 	const char *label1, *label2;
3924 
3925 	if (s->id1) {
3926 		err = got_object_id_str(&id_str1, s->id1);
3927 		if (err)
3928 			return err;
3929 		label1 = s->label1 ? : id_str1;
3930 	} else
3931 		label1 = "/dev/null";
3932 
3933 	err = got_object_id_str(&id_str2, s->id2);
3934 	if (err)
3935 		return err;
3936 	label2 = s->label2 ? : id_str2;
3937 
3938 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3939 		err = got_error_from_errno("asprintf");
3940 		free(id_str1);
3941 		free(id_str2);
3942 		return err;
3943 	}
3944 	free(id_str1);
3945 	free(id_str2);
3946 
3947 	err = draw_file(view, header);
3948 	free(header);
3949 	return err;
3950 }
3951 
3952 static const struct got_error *
3953 set_selected_commit(struct tog_diff_view_state *s,
3954     struct commit_queue_entry *entry)
3955 {
3956 	const struct got_error *err;
3957 	const struct got_object_id_queue *parent_ids;
3958 	struct got_commit_object *selected_commit;
3959 	struct got_object_qid *pid;
3960 
3961 	free(s->id2);
3962 	s->id2 = got_object_id_dup(entry->id);
3963 	if (s->id2 == NULL)
3964 		return got_error_from_errno("got_object_id_dup");
3965 
3966 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3967 	if (err)
3968 		return err;
3969 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3970 	free(s->id1);
3971 	pid = STAILQ_FIRST(parent_ids);
3972 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3973 	got_object_commit_close(selected_commit);
3974 	return NULL;
3975 }
3976 
3977 static const struct got_error *
3978 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3979 {
3980 	const struct got_error *err = NULL;
3981 	struct tog_diff_view_state *s = &view->state.diff;
3982 	struct tog_log_view_state *ls;
3983 	struct commit_queue_entry *old_selected_entry;
3984 	char *line = NULL;
3985 	size_t linesize = 0;
3986 	ssize_t linelen;
3987 	int i, nscroll = view->nlines - 1;
3988 
3989 	switch (ch) {
3990 	case '0':
3991 		view->x = 0;
3992 		break;
3993 	case '$':
3994 		view->x = MAX(view->maxx - view->ncols / 3, 0);
3995 		break;
3996 	case KEY_RIGHT:
3997 	case 'l':
3998 		if (view->x + view->ncols / 3 < view->maxx)
3999 			view->x += 2;  /* move two columns right */
4000 		break;
4001 	case KEY_LEFT:
4002 	case 'h':
4003 		view->x -= MIN(view->x, 2);  /* move two columns back */
4004 		break;
4005 	case 'a':
4006 	case 'w':
4007 		if (ch == 'a')
4008 			s->force_text_diff = !s->force_text_diff;
4009 		if (ch == 'w')
4010 			s->ignore_whitespace = !s->ignore_whitespace;
4011 		wclear(view->window);
4012 		s->first_displayed_line = 1;
4013 		s->last_displayed_line = view->nlines;
4014 		s->matched_line = 0;
4015 		diff_view_indicate_progress(view);
4016 		err = create_diff(s);
4017 		break;
4018 	case 'g':
4019 	case KEY_HOME:
4020 		s->first_displayed_line = 1;
4021 		break;
4022 	case 'G':
4023 	case KEY_END:
4024 		if (s->eof)
4025 			break;
4026 
4027 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4028 		s->eof = 1;
4029 		break;
4030 	case 'k':
4031 	case KEY_UP:
4032 	case CTRL('p'):
4033 		if (s->first_displayed_line > 1)
4034 			s->first_displayed_line--;
4035 		break;
4036 	case CTRL('u'):
4037 	case 'u':
4038 		nscroll /= 2;
4039 		/* FALL THROUGH */
4040 	case KEY_PPAGE:
4041 	case CTRL('b'):
4042 		if (s->first_displayed_line == 1)
4043 			break;
4044 		i = 0;
4045 		while (i++ < nscroll && s->first_displayed_line > 1)
4046 			s->first_displayed_line--;
4047 		break;
4048 	case 'j':
4049 	case KEY_DOWN:
4050 	case CTRL('n'):
4051 		if (!s->eof)
4052 			s->first_displayed_line++;
4053 		break;
4054 	case CTRL('d'):
4055 	case 'd':
4056 		nscroll /= 2;
4057 		/* FALL THROUGH */
4058 	case KEY_NPAGE:
4059 	case CTRL('f'):
4060 	case ' ':
4061 		if (s->eof)
4062 			break;
4063 		i = 0;
4064 		while (!s->eof && i++ < nscroll) {
4065 			linelen = getline(&line, &linesize, s->f);
4066 			s->first_displayed_line++;
4067 			if (linelen == -1) {
4068 				if (feof(s->f)) {
4069 					s->eof = 1;
4070 				} else
4071 					err = got_ferror(s->f, GOT_ERR_IO);
4072 				break;
4073 			}
4074 		}
4075 		free(line);
4076 		break;
4077 	case '[':
4078 		if (s->diff_context > 0) {
4079 			s->diff_context--;
4080 			s->matched_line = 0;
4081 			diff_view_indicate_progress(view);
4082 			err = create_diff(s);
4083 			if (s->first_displayed_line + view->nlines - 1 >
4084 			    s->nlines) {
4085 				s->first_displayed_line = 1;
4086 				s->last_displayed_line = view->nlines;
4087 			}
4088 		}
4089 		break;
4090 	case ']':
4091 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4092 			s->diff_context++;
4093 			s->matched_line = 0;
4094 			diff_view_indicate_progress(view);
4095 			err = create_diff(s);
4096 		}
4097 		break;
4098 	case '<':
4099 	case ',':
4100 		if (s->log_view == NULL)
4101 			break;
4102 		ls = &s->log_view->state.log;
4103 		old_selected_entry = ls->selected_entry;
4104 
4105 		err = input_log_view(NULL, s->log_view, KEY_UP);
4106 		if (err)
4107 			break;
4108 
4109 		if (old_selected_entry == ls->selected_entry)
4110 			break;
4111 
4112 		err = set_selected_commit(s, ls->selected_entry);
4113 		if (err)
4114 			break;
4115 
4116 		s->first_displayed_line = 1;
4117 		s->last_displayed_line = view->nlines;
4118 		s->matched_line = 0;
4119 		view->x = 0;
4120 
4121 		diff_view_indicate_progress(view);
4122 		err = create_diff(s);
4123 		break;
4124 	case '>':
4125 	case '.':
4126 		if (s->log_view == NULL)
4127 			break;
4128 		ls = &s->log_view->state.log;
4129 		old_selected_entry = ls->selected_entry;
4130 
4131 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4132 		if (err)
4133 			break;
4134 
4135 		if (old_selected_entry == ls->selected_entry)
4136 			break;
4137 
4138 		err = set_selected_commit(s, ls->selected_entry);
4139 		if (err)
4140 			break;
4141 
4142 		s->first_displayed_line = 1;
4143 		s->last_displayed_line = view->nlines;
4144 		s->matched_line = 0;
4145 		view->x = 0;
4146 
4147 		diff_view_indicate_progress(view);
4148 		err = create_diff(s);
4149 		break;
4150 	default:
4151 		break;
4152 	}
4153 
4154 	return err;
4155 }
4156 
4157 static const struct got_error *
4158 cmd_diff(int argc, char *argv[])
4159 {
4160 	const struct got_error *error = NULL;
4161 	struct got_repository *repo = NULL;
4162 	struct got_worktree *worktree = NULL;
4163 	struct got_object_id *id1 = NULL, *id2 = NULL;
4164 	char *repo_path = NULL, *cwd = NULL;
4165 	char *id_str1 = NULL, *id_str2 = NULL;
4166 	char *label1 = NULL, *label2 = NULL;
4167 	int diff_context = 3, ignore_whitespace = 0;
4168 	int ch, force_text_diff = 0;
4169 	const char *errstr;
4170 	struct tog_view *view;
4171 	int *pack_fds = NULL;
4172 
4173 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4174 		switch (ch) {
4175 		case 'a':
4176 			force_text_diff = 1;
4177 			break;
4178 		case 'C':
4179 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4180 			    &errstr);
4181 			if (errstr != NULL)
4182 				errx(1, "number of context lines is %s: %s",
4183 				    errstr, errstr);
4184 			break;
4185 		case 'r':
4186 			repo_path = realpath(optarg, NULL);
4187 			if (repo_path == NULL)
4188 				return got_error_from_errno2("realpath",
4189 				    optarg);
4190 			got_path_strip_trailing_slashes(repo_path);
4191 			break;
4192 		case 'w':
4193 			ignore_whitespace = 1;
4194 			break;
4195 		default:
4196 			usage_diff();
4197 			/* NOTREACHED */
4198 		}
4199 	}
4200 
4201 	argc -= optind;
4202 	argv += optind;
4203 
4204 	if (argc == 0) {
4205 		usage_diff(); /* TODO show local worktree changes */
4206 	} else if (argc == 2) {
4207 		id_str1 = argv[0];
4208 		id_str2 = argv[1];
4209 	} else
4210 		usage_diff();
4211 
4212 	error = got_repo_pack_fds_open(&pack_fds);
4213 	if (error)
4214 		goto done;
4215 
4216 	if (repo_path == NULL) {
4217 		cwd = getcwd(NULL, 0);
4218 		if (cwd == NULL)
4219 			return got_error_from_errno("getcwd");
4220 		error = got_worktree_open(&worktree, cwd);
4221 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4222 			goto done;
4223 		if (worktree)
4224 			repo_path =
4225 			    strdup(got_worktree_get_repo_path(worktree));
4226 		else
4227 			repo_path = strdup(cwd);
4228 		if (repo_path == NULL) {
4229 			error = got_error_from_errno("strdup");
4230 			goto done;
4231 		}
4232 	}
4233 
4234 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4235 	if (error)
4236 		goto done;
4237 
4238 	init_curses();
4239 
4240 	error = apply_unveil(got_repo_get_path(repo), NULL);
4241 	if (error)
4242 		goto done;
4243 
4244 	error = tog_load_refs(repo, 0);
4245 	if (error)
4246 		goto done;
4247 
4248 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4249 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4250 	if (error)
4251 		goto done;
4252 
4253 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4254 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4255 	if (error)
4256 		goto done;
4257 
4258 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4259 	if (view == NULL) {
4260 		error = got_error_from_errno("view_open");
4261 		goto done;
4262 	}
4263 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4264 	    ignore_whitespace, force_text_diff, NULL,  repo);
4265 	if (error)
4266 		goto done;
4267 	error = view_loop(view);
4268 done:
4269 	free(label1);
4270 	free(label2);
4271 	free(repo_path);
4272 	free(cwd);
4273 	if (repo) {
4274 		const struct got_error *close_err = got_repo_close(repo);
4275 		if (error == NULL)
4276 			error = close_err;
4277 	}
4278 	if (worktree)
4279 		got_worktree_close(worktree);
4280 	if (pack_fds) {
4281 		const struct got_error *pack_err =
4282 		    got_repo_pack_fds_close(pack_fds);
4283 		if (error == NULL)
4284 			error = pack_err;
4285 	}
4286 	tog_free_refs();
4287 	return error;
4288 }
4289 
4290 __dead static void
4291 usage_blame(void)
4292 {
4293 	endwin();
4294 	fprintf(stderr,
4295 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4296 	    getprogname());
4297 	exit(1);
4298 }
4299 
4300 struct tog_blame_line {
4301 	int annotated;
4302 	struct got_object_id *id;
4303 };
4304 
4305 static const struct got_error *
4306 draw_blame(struct tog_view *view)
4307 {
4308 	struct tog_blame_view_state *s = &view->state.blame;
4309 	struct tog_blame *blame = &s->blame;
4310 	regmatch_t *regmatch = &view->regmatch;
4311 	const struct got_error *err;
4312 	int lineno = 0, nprinted = 0;
4313 	char *line = NULL;
4314 	size_t linesize = 0;
4315 	ssize_t linelen;
4316 	wchar_t *wline;
4317 	int width;
4318 	struct tog_blame_line *blame_line;
4319 	struct got_object_id *prev_id = NULL;
4320 	char *id_str;
4321 	struct tog_color *tc;
4322 
4323 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4324 	if (err)
4325 		return err;
4326 
4327 	rewind(blame->f);
4328 	werase(view->window);
4329 
4330 	if (asprintf(&line, "commit %s", id_str) == -1) {
4331 		err = got_error_from_errno("asprintf");
4332 		free(id_str);
4333 		return err;
4334 	}
4335 
4336 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4337 	free(line);
4338 	line = NULL;
4339 	if (err)
4340 		return err;
4341 	if (view_needs_focus_indication(view))
4342 		wstandout(view->window);
4343 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4344 	if (tc)
4345 		wattr_on(view->window,
4346 		    COLOR_PAIR(tc->colorpair), NULL);
4347 	waddwstr(view->window, wline);
4348 	if (tc)
4349 		wattr_off(view->window,
4350 		    COLOR_PAIR(tc->colorpair), NULL);
4351 	if (view_needs_focus_indication(view))
4352 		wstandend(view->window);
4353 	free(wline);
4354 	wline = NULL;
4355 	if (width < view->ncols - 1)
4356 		waddch(view->window, '\n');
4357 
4358 	if (asprintf(&line, "[%d/%d] %s%s",
4359 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4360 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4361 		free(id_str);
4362 		return got_error_from_errno("asprintf");
4363 	}
4364 	free(id_str);
4365 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4366 	free(line);
4367 	line = NULL;
4368 	if (err)
4369 		return err;
4370 	waddwstr(view->window, wline);
4371 	free(wline);
4372 	wline = NULL;
4373 	if (width < view->ncols - 1)
4374 		waddch(view->window, '\n');
4375 
4376 	s->eof = 0;
4377 	view->maxx = 0;
4378 	while (nprinted < view->nlines - 2) {
4379 		linelen = getline(&line, &linesize, blame->f);
4380 		if (linelen == -1) {
4381 			if (feof(blame->f)) {
4382 				s->eof = 1;
4383 				break;
4384 			}
4385 			free(line);
4386 			return got_ferror(blame->f, GOT_ERR_IO);
4387 		}
4388 		if (++lineno < s->first_displayed_line)
4389 			continue;
4390 
4391 		/* Set view->maxx based on full line length. */
4392 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4393 		if (err) {
4394 			free(line);
4395 			return err;
4396 		}
4397 		free(wline);
4398 		wline = NULL;
4399 		view->maxx = MAX(view->maxx, width);
4400 
4401 		if (view->focussed && nprinted == s->selected_line - 1)
4402 			wstandout(view->window);
4403 
4404 		if (blame->nlines > 0) {
4405 			blame_line = &blame->lines[lineno - 1];
4406 			if (blame_line->annotated && prev_id &&
4407 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4408 			    !(view->focussed &&
4409 			    nprinted == s->selected_line - 1)) {
4410 				waddstr(view->window, "        ");
4411 			} else if (blame_line->annotated) {
4412 				char *id_str;
4413 				err = got_object_id_str(&id_str,
4414 				    blame_line->id);
4415 				if (err) {
4416 					free(line);
4417 					return err;
4418 				}
4419 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4420 				if (tc)
4421 					wattr_on(view->window,
4422 					    COLOR_PAIR(tc->colorpair), NULL);
4423 				wprintw(view->window, "%.8s", id_str);
4424 				if (tc)
4425 					wattr_off(view->window,
4426 					    COLOR_PAIR(tc->colorpair), NULL);
4427 				free(id_str);
4428 				prev_id = blame_line->id;
4429 			} else {
4430 				waddstr(view->window, "........");
4431 				prev_id = NULL;
4432 			}
4433 		} else {
4434 			waddstr(view->window, "........");
4435 			prev_id = NULL;
4436 		}
4437 
4438 		if (view->focussed && nprinted == s->selected_line - 1)
4439 			wstandend(view->window);
4440 		waddstr(view->window, " ");
4441 
4442 		if (view->ncols <= 9) {
4443 			width = 9;
4444 		} else if (s->first_displayed_line + nprinted ==
4445 		    s->matched_line &&
4446 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4447 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4448 			    view->window, view->x, regmatch);
4449 			if (err) {
4450 				free(line);
4451 				return err;
4452 			}
4453 			width += 9;
4454 		} else {
4455 			int skip;
4456 			err = format_line(&wline, &width, &skip, line,
4457 			    view->x, view->ncols - 9, 9, 1);
4458 			if (err) {
4459 				free(line);
4460 				return err;
4461 			}
4462 			waddwstr(view->window, &wline[skip]);
4463 			width += 9;
4464 			free(wline);
4465 			wline = NULL;
4466 		}
4467 
4468 		if (width <= view->ncols - 1)
4469 			waddch(view->window, '\n');
4470 		if (++nprinted == 1)
4471 			s->first_displayed_line = lineno;
4472 	}
4473 	free(line);
4474 	s->last_displayed_line = lineno;
4475 
4476 	view_vborder(view);
4477 
4478 	return NULL;
4479 }
4480 
4481 static const struct got_error *
4482 blame_cb(void *arg, int nlines, int lineno,
4483     struct got_commit_object *commit, struct got_object_id *id)
4484 {
4485 	const struct got_error *err = NULL;
4486 	struct tog_blame_cb_args *a = arg;
4487 	struct tog_blame_line *line;
4488 	int errcode;
4489 
4490 	if (nlines != a->nlines ||
4491 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4492 		return got_error(GOT_ERR_RANGE);
4493 
4494 	errcode = pthread_mutex_lock(&tog_mutex);
4495 	if (errcode)
4496 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4497 
4498 	if (*a->quit) {	/* user has quit the blame view */
4499 		err = got_error(GOT_ERR_ITER_COMPLETED);
4500 		goto done;
4501 	}
4502 
4503 	if (lineno == -1)
4504 		goto done; /* no change in this commit */
4505 
4506 	line = &a->lines[lineno - 1];
4507 	if (line->annotated)
4508 		goto done;
4509 
4510 	line->id = got_object_id_dup(id);
4511 	if (line->id == NULL) {
4512 		err = got_error_from_errno("got_object_id_dup");
4513 		goto done;
4514 	}
4515 	line->annotated = 1;
4516 done:
4517 	errcode = pthread_mutex_unlock(&tog_mutex);
4518 	if (errcode)
4519 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4520 	return err;
4521 }
4522 
4523 static void *
4524 blame_thread(void *arg)
4525 {
4526 	const struct got_error *err, *close_err;
4527 	struct tog_blame_thread_args *ta = arg;
4528 	struct tog_blame_cb_args *a = ta->cb_args;
4529 	int errcode;
4530 
4531 	err = block_signals_used_by_main_thread();
4532 	if (err)
4533 		return (void *)err;
4534 
4535 	err = got_blame(ta->path, a->commit_id, ta->repo,
4536 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4537 	if (err && err->code == GOT_ERR_CANCELLED)
4538 		err = NULL;
4539 
4540 	errcode = pthread_mutex_lock(&tog_mutex);
4541 	if (errcode)
4542 		return (void *)got_error_set_errno(errcode,
4543 		    "pthread_mutex_lock");
4544 
4545 	close_err = got_repo_close(ta->repo);
4546 	if (err == NULL)
4547 		err = close_err;
4548 	ta->repo = NULL;
4549 	*ta->complete = 1;
4550 
4551 	errcode = pthread_mutex_unlock(&tog_mutex);
4552 	if (errcode && err == NULL)
4553 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4554 
4555 	return (void *)err;
4556 }
4557 
4558 static struct got_object_id *
4559 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4560     int first_displayed_line, int selected_line)
4561 {
4562 	struct tog_blame_line *line;
4563 
4564 	if (nlines <= 0)
4565 		return NULL;
4566 
4567 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4568 	if (!line->annotated)
4569 		return NULL;
4570 
4571 	return line->id;
4572 }
4573 
4574 static const struct got_error *
4575 stop_blame(struct tog_blame *blame)
4576 {
4577 	const struct got_error *err = NULL;
4578 	int i;
4579 
4580 	if (blame->thread) {
4581 		int errcode;
4582 		errcode = pthread_mutex_unlock(&tog_mutex);
4583 		if (errcode)
4584 			return got_error_set_errno(errcode,
4585 			    "pthread_mutex_unlock");
4586 		errcode = pthread_join(blame->thread, (void **)&err);
4587 		if (errcode)
4588 			return got_error_set_errno(errcode, "pthread_join");
4589 		errcode = pthread_mutex_lock(&tog_mutex);
4590 		if (errcode)
4591 			return got_error_set_errno(errcode,
4592 			    "pthread_mutex_lock");
4593 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4594 			err = NULL;
4595 		blame->thread = NULL;
4596 	}
4597 	if (blame->thread_args.repo) {
4598 		const struct got_error *close_err;
4599 		close_err = got_repo_close(blame->thread_args.repo);
4600 		if (err == NULL)
4601 			err = close_err;
4602 		blame->thread_args.repo = NULL;
4603 	}
4604 	if (blame->f) {
4605 		if (fclose(blame->f) == EOF && err == NULL)
4606 			err = got_error_from_errno("fclose");
4607 		blame->f = NULL;
4608 	}
4609 	if (blame->lines) {
4610 		for (i = 0; i < blame->nlines; i++)
4611 			free(blame->lines[i].id);
4612 		free(blame->lines);
4613 		blame->lines = NULL;
4614 	}
4615 	free(blame->cb_args.commit_id);
4616 	blame->cb_args.commit_id = NULL;
4617 	if (blame->pack_fds) {
4618 		const struct got_error *pack_err =
4619 		    got_repo_pack_fds_close(blame->pack_fds);
4620 		if (err == NULL)
4621 			err = pack_err;
4622 		blame->pack_fds = NULL;
4623 	}
4624 	return err;
4625 }
4626 
4627 static const struct got_error *
4628 cancel_blame_view(void *arg)
4629 {
4630 	const struct got_error *err = NULL;
4631 	int *done = arg;
4632 	int errcode;
4633 
4634 	errcode = pthread_mutex_lock(&tog_mutex);
4635 	if (errcode)
4636 		return got_error_set_errno(errcode,
4637 		    "pthread_mutex_unlock");
4638 
4639 	if (*done)
4640 		err = got_error(GOT_ERR_CANCELLED);
4641 
4642 	errcode = pthread_mutex_unlock(&tog_mutex);
4643 	if (errcode)
4644 		return got_error_set_errno(errcode,
4645 		    "pthread_mutex_lock");
4646 
4647 	return err;
4648 }
4649 
4650 static const struct got_error *
4651 run_blame(struct tog_view *view)
4652 {
4653 	struct tog_blame_view_state *s = &view->state.blame;
4654 	struct tog_blame *blame = &s->blame;
4655 	const struct got_error *err = NULL;
4656 	struct got_commit_object *commit = NULL;
4657 	struct got_blob_object *blob = NULL;
4658 	struct got_repository *thread_repo = NULL;
4659 	struct got_object_id *obj_id = NULL;
4660 	int obj_type;
4661 	int *pack_fds = NULL;
4662 
4663 	err = got_object_open_as_commit(&commit, s->repo,
4664 	    &s->blamed_commit->id);
4665 	if (err)
4666 		return err;
4667 
4668 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4669 	if (err)
4670 		goto done;
4671 
4672 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4673 	if (err)
4674 		goto done;
4675 
4676 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4677 		err = got_error(GOT_ERR_OBJ_TYPE);
4678 		goto done;
4679 	}
4680 
4681 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4682 	if (err)
4683 		goto done;
4684 	blame->f = got_opentemp();
4685 	if (blame->f == NULL) {
4686 		err = got_error_from_errno("got_opentemp");
4687 		goto done;
4688 	}
4689 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4690 	    &blame->line_offsets, blame->f, blob);
4691 	if (err)
4692 		goto done;
4693 	if (blame->nlines == 0) {
4694 		s->blame_complete = 1;
4695 		goto done;
4696 	}
4697 
4698 	/* Don't include \n at EOF in the blame line count. */
4699 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4700 		blame->nlines--;
4701 
4702 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4703 	if (blame->lines == NULL) {
4704 		err = got_error_from_errno("calloc");
4705 		goto done;
4706 	}
4707 
4708 	err = got_repo_pack_fds_open(&pack_fds);
4709 	if (err)
4710 		goto done;
4711 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4712 	    pack_fds);
4713 	if (err)
4714 		goto done;
4715 
4716 	blame->pack_fds = pack_fds;
4717 	blame->cb_args.view = view;
4718 	blame->cb_args.lines = blame->lines;
4719 	blame->cb_args.nlines = blame->nlines;
4720 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4721 	if (blame->cb_args.commit_id == NULL) {
4722 		err = got_error_from_errno("got_object_id_dup");
4723 		goto done;
4724 	}
4725 	blame->cb_args.quit = &s->done;
4726 
4727 	blame->thread_args.path = s->path;
4728 	blame->thread_args.repo = thread_repo;
4729 	blame->thread_args.cb_args = &blame->cb_args;
4730 	blame->thread_args.complete = &s->blame_complete;
4731 	blame->thread_args.cancel_cb = cancel_blame_view;
4732 	blame->thread_args.cancel_arg = &s->done;
4733 	s->blame_complete = 0;
4734 
4735 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4736 		s->first_displayed_line = 1;
4737 		s->last_displayed_line = view->nlines;
4738 		s->selected_line = 1;
4739 	}
4740 	s->matched_line = 0;
4741 
4742 done:
4743 	if (commit)
4744 		got_object_commit_close(commit);
4745 	if (blob)
4746 		got_object_blob_close(blob);
4747 	free(obj_id);
4748 	if (err)
4749 		stop_blame(blame);
4750 	return err;
4751 }
4752 
4753 static const struct got_error *
4754 open_blame_view(struct tog_view *view, char *path,
4755     struct got_object_id *commit_id, struct got_repository *repo)
4756 {
4757 	const struct got_error *err = NULL;
4758 	struct tog_blame_view_state *s = &view->state.blame;
4759 
4760 	STAILQ_INIT(&s->blamed_commits);
4761 
4762 	s->path = strdup(path);
4763 	if (s->path == NULL)
4764 		return got_error_from_errno("strdup");
4765 
4766 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4767 	if (err) {
4768 		free(s->path);
4769 		return err;
4770 	}
4771 
4772 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4773 	s->first_displayed_line = 1;
4774 	s->last_displayed_line = view->nlines;
4775 	s->selected_line = 1;
4776 	s->blame_complete = 0;
4777 	s->repo = repo;
4778 	s->commit_id = commit_id;
4779 	memset(&s->blame, 0, sizeof(s->blame));
4780 
4781 	STAILQ_INIT(&s->colors);
4782 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4783 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4784 		    get_color_value("TOG_COLOR_COMMIT"));
4785 		if (err)
4786 			return err;
4787 	}
4788 
4789 	view->show = show_blame_view;
4790 	view->input = input_blame_view;
4791 	view->close = close_blame_view;
4792 	view->search_start = search_start_blame_view;
4793 	view->search_next = search_next_blame_view;
4794 
4795 	return run_blame(view);
4796 }
4797 
4798 static const struct got_error *
4799 close_blame_view(struct tog_view *view)
4800 {
4801 	const struct got_error *err = NULL;
4802 	struct tog_blame_view_state *s = &view->state.blame;
4803 
4804 	if (s->blame.thread)
4805 		err = stop_blame(&s->blame);
4806 
4807 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4808 		struct got_object_qid *blamed_commit;
4809 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4810 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4811 		got_object_qid_free(blamed_commit);
4812 	}
4813 
4814 	free(s->path);
4815 	free_colors(&s->colors);
4816 	return err;
4817 }
4818 
4819 static const struct got_error *
4820 search_start_blame_view(struct tog_view *view)
4821 {
4822 	struct tog_blame_view_state *s = &view->state.blame;
4823 
4824 	s->matched_line = 0;
4825 	return NULL;
4826 }
4827 
4828 static const struct got_error *
4829 search_next_blame_view(struct tog_view *view)
4830 {
4831 	struct tog_blame_view_state *s = &view->state.blame;
4832 	const struct got_error *err = NULL;
4833 	int lineno;
4834 	char *line = NULL;
4835 	size_t linesize = 0;
4836 	ssize_t linelen;
4837 
4838 	if (!view->searching) {
4839 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4840 		return NULL;
4841 	}
4842 
4843 	if (s->matched_line) {
4844 		if (view->searching == TOG_SEARCH_FORWARD)
4845 			lineno = s->matched_line + 1;
4846 		else
4847 			lineno = s->matched_line - 1;
4848 	} else
4849 		lineno = s->first_displayed_line - 1 + s->selected_line;
4850 
4851 	while (1) {
4852 		off_t offset;
4853 
4854 		if (lineno <= 0 || lineno > s->blame.nlines) {
4855 			if (s->matched_line == 0) {
4856 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4857 				break;
4858 			}
4859 
4860 			if (view->searching == TOG_SEARCH_FORWARD)
4861 				lineno = 1;
4862 			else
4863 				lineno = s->blame.nlines;
4864 		}
4865 
4866 		offset = s->blame.line_offsets[lineno - 1];
4867 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4868 			free(line);
4869 			return got_error_from_errno("fseeko");
4870 		}
4871 		linelen = getline(&line, &linesize, s->blame.f);
4872 		if (linelen != -1) {
4873 			char *exstr;
4874 			err = expand_tab(&exstr, line);
4875 			if (err)
4876 				break;
4877 			if (match_line(exstr, &view->regex, 1,
4878 			    &view->regmatch)) {
4879 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4880 				s->matched_line = lineno;
4881 				free(exstr);
4882 				break;
4883 			}
4884 			free(exstr);
4885 		}
4886 		if (view->searching == TOG_SEARCH_FORWARD)
4887 			lineno++;
4888 		else
4889 			lineno--;
4890 	}
4891 	free(line);
4892 
4893 	if (s->matched_line) {
4894 		s->first_displayed_line = s->matched_line;
4895 		s->selected_line = 1;
4896 	}
4897 
4898 	return err;
4899 }
4900 
4901 static const struct got_error *
4902 show_blame_view(struct tog_view *view)
4903 {
4904 	const struct got_error *err = NULL;
4905 	struct tog_blame_view_state *s = &view->state.blame;
4906 	int errcode;
4907 
4908 	if (s->blame.thread == NULL && !s->blame_complete) {
4909 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4910 		    &s->blame.thread_args);
4911 		if (errcode)
4912 			return got_error_set_errno(errcode, "pthread_create");
4913 
4914 		halfdelay(1); /* fast refresh while annotating  */
4915 	}
4916 
4917 	if (s->blame_complete)
4918 		halfdelay(10); /* disable fast refresh */
4919 
4920 	err = draw_blame(view);
4921 
4922 	view_vborder(view);
4923 	return err;
4924 }
4925 
4926 static const struct got_error *
4927 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4928 {
4929 	const struct got_error *err = NULL, *thread_err = NULL;
4930 	struct tog_view *diff_view;
4931 	struct tog_blame_view_state *s = &view->state.blame;
4932 	int begin_x = 0, nscroll = view->nlines - 2;
4933 
4934 	switch (ch) {
4935 	case '0':
4936 		view->x = 0;
4937 		break;
4938 	case '$':
4939 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4940 		break;
4941 	case KEY_RIGHT:
4942 	case 'l':
4943 		if (view->x + view->ncols / 3 < view->maxx)
4944 			view->x += 2;  /* move two columns right */
4945 		break;
4946 	case KEY_LEFT:
4947 	case 'h':
4948 		view->x -= MIN(view->x, 2);  /* move two columns back */
4949 		break;
4950 	case 'q':
4951 		s->done = 1;
4952 		break;
4953 	case 'g':
4954 	case KEY_HOME:
4955 		s->selected_line = 1;
4956 		s->first_displayed_line = 1;
4957 		break;
4958 	case 'G':
4959 	case KEY_END:
4960 		if (s->blame.nlines < view->nlines - 2) {
4961 			s->selected_line = s->blame.nlines;
4962 			s->first_displayed_line = 1;
4963 		} else {
4964 			s->selected_line = view->nlines - 2;
4965 			s->first_displayed_line = s->blame.nlines -
4966 			    (view->nlines - 3);
4967 		}
4968 		break;
4969 	case 'k':
4970 	case KEY_UP:
4971 	case CTRL('p'):
4972 		if (s->selected_line > 1)
4973 			s->selected_line--;
4974 		else if (s->selected_line == 1 &&
4975 		    s->first_displayed_line > 1)
4976 			s->first_displayed_line--;
4977 		break;
4978 	case CTRL('u'):
4979 	case 'u':
4980 		nscroll /= 2;
4981 		/* FALL THROUGH */
4982 	case KEY_PPAGE:
4983 	case CTRL('b'):
4984 		if (s->first_displayed_line == 1) {
4985 			s->selected_line = MAX(1, s->selected_line - nscroll);
4986 			break;
4987 		}
4988 		if (s->first_displayed_line > nscroll)
4989 			s->first_displayed_line -= nscroll;
4990 		else
4991 			s->first_displayed_line = 1;
4992 		break;
4993 	case 'j':
4994 	case KEY_DOWN:
4995 	case CTRL('n'):
4996 		if (s->selected_line < view->nlines - 2 &&
4997 		    s->first_displayed_line +
4998 		    s->selected_line <= s->blame.nlines)
4999 			s->selected_line++;
5000 		else if (s->last_displayed_line <
5001 		    s->blame.nlines)
5002 			s->first_displayed_line++;
5003 		break;
5004 	case 'b':
5005 	case 'p': {
5006 		struct got_object_id *id = NULL;
5007 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5008 		    s->first_displayed_line, s->selected_line);
5009 		if (id == NULL)
5010 			break;
5011 		if (ch == 'p') {
5012 			struct got_commit_object *commit, *pcommit;
5013 			struct got_object_qid *pid;
5014 			struct got_object_id *blob_id = NULL;
5015 			int obj_type;
5016 			err = got_object_open_as_commit(&commit,
5017 			    s->repo, id);
5018 			if (err)
5019 				break;
5020 			pid = STAILQ_FIRST(
5021 			    got_object_commit_get_parent_ids(commit));
5022 			if (pid == NULL) {
5023 				got_object_commit_close(commit);
5024 				break;
5025 			}
5026 			/* Check if path history ends here. */
5027 			err = got_object_open_as_commit(&pcommit,
5028 			    s->repo, &pid->id);
5029 			if (err)
5030 				break;
5031 			err = got_object_id_by_path(&blob_id, s->repo,
5032 			    pcommit, s->path);
5033 			got_object_commit_close(pcommit);
5034 			if (err) {
5035 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5036 					err = NULL;
5037 				got_object_commit_close(commit);
5038 				break;
5039 			}
5040 			err = got_object_get_type(&obj_type, s->repo,
5041 			    blob_id);
5042 			free(blob_id);
5043 			/* Can't blame non-blob type objects. */
5044 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5045 				got_object_commit_close(commit);
5046 				break;
5047 			}
5048 			err = got_object_qid_alloc(&s->blamed_commit,
5049 			    &pid->id);
5050 			got_object_commit_close(commit);
5051 		} else {
5052 			if (got_object_id_cmp(id,
5053 			    &s->blamed_commit->id) == 0)
5054 				break;
5055 			err = got_object_qid_alloc(&s->blamed_commit,
5056 			    id);
5057 		}
5058 		if (err)
5059 			break;
5060 		s->done = 1;
5061 		thread_err = stop_blame(&s->blame);
5062 		s->done = 0;
5063 		if (thread_err)
5064 			break;
5065 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5066 		    s->blamed_commit, entry);
5067 		err = run_blame(view);
5068 		if (err)
5069 			break;
5070 		break;
5071 	}
5072 	case 'B': {
5073 		struct got_object_qid *first;
5074 		first = STAILQ_FIRST(&s->blamed_commits);
5075 		if (!got_object_id_cmp(&first->id, s->commit_id))
5076 			break;
5077 		s->done = 1;
5078 		thread_err = stop_blame(&s->blame);
5079 		s->done = 0;
5080 		if (thread_err)
5081 			break;
5082 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5083 		got_object_qid_free(s->blamed_commit);
5084 		s->blamed_commit =
5085 		    STAILQ_FIRST(&s->blamed_commits);
5086 		err = run_blame(view);
5087 		if (err)
5088 			break;
5089 		break;
5090 	}
5091 	case KEY_ENTER:
5092 	case '\r': {
5093 		struct got_object_id *id = NULL;
5094 		struct got_object_qid *pid;
5095 		struct got_commit_object *commit = NULL;
5096 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5097 		    s->first_displayed_line, s->selected_line);
5098 		if (id == NULL)
5099 			break;
5100 		err = got_object_open_as_commit(&commit, s->repo, id);
5101 		if (err)
5102 			break;
5103 		pid = STAILQ_FIRST(
5104 		    got_object_commit_get_parent_ids(commit));
5105 		if (view_is_parent_view(view))
5106 		    begin_x = view_split_begin_x(view->begin_x);
5107 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5108 		if (diff_view == NULL) {
5109 			got_object_commit_close(commit);
5110 			err = got_error_from_errno("view_open");
5111 			break;
5112 		}
5113 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5114 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5115 		got_object_commit_close(commit);
5116 		if (err) {
5117 			view_close(diff_view);
5118 			break;
5119 		}
5120 		view->focussed = 0;
5121 		diff_view->focussed = 1;
5122 		if (view_is_parent_view(view)) {
5123 			err = view_close_child(view);
5124 			if (err)
5125 				break;
5126 			err = view_set_child(view, diff_view);
5127 			if (err)
5128 				break;
5129 			view->focus_child = 1;
5130 		} else
5131 			*new_view = diff_view;
5132 		if (err)
5133 			break;
5134 		break;
5135 	}
5136 	case CTRL('d'):
5137 	case 'd':
5138 		nscroll /= 2;
5139 		/* FALL THROUGH */
5140 	case KEY_NPAGE:
5141 	case CTRL('f'):
5142 	case ' ':
5143 		if (s->last_displayed_line >= s->blame.nlines &&
5144 		    s->selected_line >= MIN(s->blame.nlines,
5145 		    view->nlines - 2)) {
5146 			break;
5147 		}
5148 		if (s->last_displayed_line >= s->blame.nlines &&
5149 		    s->selected_line < view->nlines - 2) {
5150 			s->selected_line +=
5151 			    MIN(nscroll, s->last_displayed_line -
5152 			    s->first_displayed_line - s->selected_line + 1);
5153 		}
5154 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5155 			s->first_displayed_line += nscroll;
5156 		else
5157 			s->first_displayed_line =
5158 			    s->blame.nlines - (view->nlines - 3);
5159 		break;
5160 	case KEY_RESIZE:
5161 		if (s->selected_line > view->nlines - 2) {
5162 			s->selected_line = MIN(s->blame.nlines,
5163 			    view->nlines - 2);
5164 		}
5165 		break;
5166 	default:
5167 		break;
5168 	}
5169 	return thread_err ? thread_err : err;
5170 }
5171 
5172 static const struct got_error *
5173 cmd_blame(int argc, char *argv[])
5174 {
5175 	const struct got_error *error;
5176 	struct got_repository *repo = NULL;
5177 	struct got_worktree *worktree = NULL;
5178 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5179 	char *link_target = NULL;
5180 	struct got_object_id *commit_id = NULL;
5181 	struct got_commit_object *commit = NULL;
5182 	char *commit_id_str = NULL;
5183 	int ch;
5184 	struct tog_view *view;
5185 	int *pack_fds = NULL;
5186 
5187 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5188 		switch (ch) {
5189 		case 'c':
5190 			commit_id_str = optarg;
5191 			break;
5192 		case 'r':
5193 			repo_path = realpath(optarg, NULL);
5194 			if (repo_path == NULL)
5195 				return got_error_from_errno2("realpath",
5196 				    optarg);
5197 			break;
5198 		default:
5199 			usage_blame();
5200 			/* NOTREACHED */
5201 		}
5202 	}
5203 
5204 	argc -= optind;
5205 	argv += optind;
5206 
5207 	if (argc != 1)
5208 		usage_blame();
5209 
5210 	error = got_repo_pack_fds_open(&pack_fds);
5211 	if (error != NULL)
5212 		goto done;
5213 
5214 	if (repo_path == NULL) {
5215 		cwd = getcwd(NULL, 0);
5216 		if (cwd == NULL)
5217 			return got_error_from_errno("getcwd");
5218 		error = got_worktree_open(&worktree, cwd);
5219 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5220 			goto done;
5221 		if (worktree)
5222 			repo_path =
5223 			    strdup(got_worktree_get_repo_path(worktree));
5224 		else
5225 			repo_path = strdup(cwd);
5226 		if (repo_path == NULL) {
5227 			error = got_error_from_errno("strdup");
5228 			goto done;
5229 		}
5230 	}
5231 
5232 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5233 	if (error != NULL)
5234 		goto done;
5235 
5236 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5237 	    worktree);
5238 	if (error)
5239 		goto done;
5240 
5241 	init_curses();
5242 
5243 	error = apply_unveil(got_repo_get_path(repo), NULL);
5244 	if (error)
5245 		goto done;
5246 
5247 	error = tog_load_refs(repo, 0);
5248 	if (error)
5249 		goto done;
5250 
5251 	if (commit_id_str == NULL) {
5252 		struct got_reference *head_ref;
5253 		error = got_ref_open(&head_ref, repo, worktree ?
5254 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5255 		if (error != NULL)
5256 			goto done;
5257 		error = got_ref_resolve(&commit_id, repo, head_ref);
5258 		got_ref_close(head_ref);
5259 	} else {
5260 		error = got_repo_match_object_id(&commit_id, NULL,
5261 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5262 	}
5263 	if (error != NULL)
5264 		goto done;
5265 
5266 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5267 	if (view == NULL) {
5268 		error = got_error_from_errno("view_open");
5269 		goto done;
5270 	}
5271 
5272 	error = got_object_open_as_commit(&commit, repo, commit_id);
5273 	if (error)
5274 		goto done;
5275 
5276 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5277 	    commit, repo);
5278 	if (error)
5279 		goto done;
5280 
5281 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5282 	    commit_id, repo);
5283 	if (error)
5284 		goto done;
5285 	if (worktree) {
5286 		/* Release work tree lock. */
5287 		got_worktree_close(worktree);
5288 		worktree = NULL;
5289 	}
5290 	error = view_loop(view);
5291 done:
5292 	free(repo_path);
5293 	free(in_repo_path);
5294 	free(link_target);
5295 	free(cwd);
5296 	free(commit_id);
5297 	if (commit)
5298 		got_object_commit_close(commit);
5299 	if (worktree)
5300 		got_worktree_close(worktree);
5301 	if (repo) {
5302 		const struct got_error *close_err = got_repo_close(repo);
5303 		if (error == NULL)
5304 			error = close_err;
5305 	}
5306 	if (pack_fds) {
5307 		const struct got_error *pack_err =
5308 		    got_repo_pack_fds_close(pack_fds);
5309 		if (error == NULL)
5310 			error = pack_err;
5311 	}
5312 	tog_free_refs();
5313 	return error;
5314 }
5315 
5316 static const struct got_error *
5317 draw_tree_entries(struct tog_view *view, const char *parent_path)
5318 {
5319 	struct tog_tree_view_state *s = &view->state.tree;
5320 	const struct got_error *err = NULL;
5321 	struct got_tree_entry *te;
5322 	wchar_t *wline;
5323 	struct tog_color *tc;
5324 	int width, n, i, nentries;
5325 	int limit = view->nlines;
5326 
5327 	s->ndisplayed = 0;
5328 
5329 	werase(view->window);
5330 
5331 	if (limit == 0)
5332 		return NULL;
5333 
5334 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5335 	    0, 0);
5336 	if (err)
5337 		return err;
5338 	if (view_needs_focus_indication(view))
5339 		wstandout(view->window);
5340 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5341 	if (tc)
5342 		wattr_on(view->window,
5343 		    COLOR_PAIR(tc->colorpair), NULL);
5344 	waddwstr(view->window, wline);
5345 	if (tc)
5346 		wattr_off(view->window,
5347 		    COLOR_PAIR(tc->colorpair), NULL);
5348 	if (view_needs_focus_indication(view))
5349 		wstandend(view->window);
5350 	free(wline);
5351 	wline = NULL;
5352 	if (width < view->ncols - 1)
5353 		waddch(view->window, '\n');
5354 	if (--limit <= 0)
5355 		return NULL;
5356 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5357 	    0, 0);
5358 	if (err)
5359 		return err;
5360 	waddwstr(view->window, wline);
5361 	free(wline);
5362 	wline = NULL;
5363 	if (width < view->ncols - 1)
5364 		waddch(view->window, '\n');
5365 	if (--limit <= 0)
5366 		return NULL;
5367 	waddch(view->window, '\n');
5368 	if (--limit <= 0)
5369 		return NULL;
5370 
5371 	if (s->first_displayed_entry == NULL) {
5372 		te = got_object_tree_get_first_entry(s->tree);
5373 		if (s->selected == 0) {
5374 			if (view->focussed)
5375 				wstandout(view->window);
5376 			s->selected_entry = NULL;
5377 		}
5378 		waddstr(view->window, "  ..\n");	/* parent directory */
5379 		if (s->selected == 0 && view->focussed)
5380 			wstandend(view->window);
5381 		s->ndisplayed++;
5382 		if (--limit <= 0)
5383 			return NULL;
5384 		n = 1;
5385 	} else {
5386 		n = 0;
5387 		te = s->first_displayed_entry;
5388 	}
5389 
5390 	nentries = got_object_tree_get_nentries(s->tree);
5391 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5392 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5393 		const char *modestr = "";
5394 		mode_t mode;
5395 
5396 		te = got_object_tree_get_entry(s->tree, i);
5397 		mode = got_tree_entry_get_mode(te);
5398 
5399 		if (s->show_ids) {
5400 			err = got_object_id_str(&id_str,
5401 			    got_tree_entry_get_id(te));
5402 			if (err)
5403 				return got_error_from_errno(
5404 				    "got_object_id_str");
5405 		}
5406 		if (got_object_tree_entry_is_submodule(te))
5407 			modestr = "$";
5408 		else if (S_ISLNK(mode)) {
5409 			int i;
5410 
5411 			err = got_tree_entry_get_symlink_target(&link_target,
5412 			    te, s->repo);
5413 			if (err) {
5414 				free(id_str);
5415 				return err;
5416 			}
5417 			for (i = 0; i < strlen(link_target); i++) {
5418 				if (!isprint((unsigned char)link_target[i]))
5419 					link_target[i] = '?';
5420 			}
5421 			modestr = "@";
5422 		}
5423 		else if (S_ISDIR(mode))
5424 			modestr = "/";
5425 		else if (mode & S_IXUSR)
5426 			modestr = "*";
5427 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5428 		    got_tree_entry_get_name(te), modestr,
5429 		    link_target ? " -> ": "",
5430 		    link_target ? link_target : "") == -1) {
5431 			free(id_str);
5432 			free(link_target);
5433 			return got_error_from_errno("asprintf");
5434 		}
5435 		free(id_str);
5436 		free(link_target);
5437 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5438 		    0, 0);
5439 		if (err) {
5440 			free(line);
5441 			break;
5442 		}
5443 		if (n == s->selected) {
5444 			if (view->focussed)
5445 				wstandout(view->window);
5446 			s->selected_entry = te;
5447 		}
5448 		tc = match_color(&s->colors, line);
5449 		if (tc)
5450 			wattr_on(view->window,
5451 			    COLOR_PAIR(tc->colorpair), NULL);
5452 		waddwstr(view->window, wline);
5453 		if (tc)
5454 			wattr_off(view->window,
5455 			    COLOR_PAIR(tc->colorpair), NULL);
5456 		if (width < view->ncols - 1)
5457 			waddch(view->window, '\n');
5458 		if (n == s->selected && view->focussed)
5459 			wstandend(view->window);
5460 		free(line);
5461 		free(wline);
5462 		wline = NULL;
5463 		n++;
5464 		s->ndisplayed++;
5465 		s->last_displayed_entry = te;
5466 		if (--limit <= 0)
5467 			break;
5468 	}
5469 
5470 	return err;
5471 }
5472 
5473 static void
5474 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5475 {
5476 	struct got_tree_entry *te;
5477 	int isroot = s->tree == s->root;
5478 	int i = 0;
5479 
5480 	if (s->first_displayed_entry == NULL)
5481 		return;
5482 
5483 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5484 	while (i++ < maxscroll) {
5485 		if (te == NULL) {
5486 			if (!isroot)
5487 				s->first_displayed_entry = NULL;
5488 			break;
5489 		}
5490 		s->first_displayed_entry = te;
5491 		te = got_tree_entry_get_prev(s->tree, te);
5492 	}
5493 }
5494 
5495 static void
5496 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5497 {
5498 	struct got_tree_entry *next, *last;
5499 	int n = 0;
5500 
5501 	if (s->first_displayed_entry)
5502 		next = got_tree_entry_get_next(s->tree,
5503 		    s->first_displayed_entry);
5504 	else
5505 		next = got_object_tree_get_first_entry(s->tree);
5506 
5507 	last = s->last_displayed_entry;
5508 	while (next && last && n++ < maxscroll) {
5509 		last = got_tree_entry_get_next(s->tree, last);
5510 		if (last) {
5511 			s->first_displayed_entry = next;
5512 			next = got_tree_entry_get_next(s->tree, next);
5513 		}
5514 	}
5515 }
5516 
5517 static const struct got_error *
5518 tree_entry_path(char **path, struct tog_parent_trees *parents,
5519     struct got_tree_entry *te)
5520 {
5521 	const struct got_error *err = NULL;
5522 	struct tog_parent_tree *pt;
5523 	size_t len = 2; /* for leading slash and NUL */
5524 
5525 	TAILQ_FOREACH(pt, parents, entry)
5526 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5527 		    + 1 /* slash */;
5528 	if (te)
5529 		len += strlen(got_tree_entry_get_name(te));
5530 
5531 	*path = calloc(1, len);
5532 	if (path == NULL)
5533 		return got_error_from_errno("calloc");
5534 
5535 	(*path)[0] = '/';
5536 	pt = TAILQ_LAST(parents, tog_parent_trees);
5537 	while (pt) {
5538 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5539 		if (strlcat(*path, name, len) >= len) {
5540 			err = got_error(GOT_ERR_NO_SPACE);
5541 			goto done;
5542 		}
5543 		if (strlcat(*path, "/", len) >= len) {
5544 			err = got_error(GOT_ERR_NO_SPACE);
5545 			goto done;
5546 		}
5547 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5548 	}
5549 	if (te) {
5550 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5551 			err = got_error(GOT_ERR_NO_SPACE);
5552 			goto done;
5553 		}
5554 	}
5555 done:
5556 	if (err) {
5557 		free(*path);
5558 		*path = NULL;
5559 	}
5560 	return err;
5561 }
5562 
5563 static const struct got_error *
5564 blame_tree_entry(struct tog_view **new_view, int begin_x,
5565     struct got_tree_entry *te, struct tog_parent_trees *parents,
5566     struct got_object_id *commit_id, struct got_repository *repo)
5567 {
5568 	const struct got_error *err = NULL;
5569 	char *path;
5570 	struct tog_view *blame_view;
5571 
5572 	*new_view = NULL;
5573 
5574 	err = tree_entry_path(&path, parents, te);
5575 	if (err)
5576 		return err;
5577 
5578 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5579 	if (blame_view == NULL) {
5580 		err = got_error_from_errno("view_open");
5581 		goto done;
5582 	}
5583 
5584 	err = open_blame_view(blame_view, path, commit_id, repo);
5585 	if (err) {
5586 		if (err->code == GOT_ERR_CANCELLED)
5587 			err = NULL;
5588 		view_close(blame_view);
5589 	} else
5590 		*new_view = blame_view;
5591 done:
5592 	free(path);
5593 	return err;
5594 }
5595 
5596 static const struct got_error *
5597 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5598     struct tog_tree_view_state *s)
5599 {
5600 	struct tog_view *log_view;
5601 	const struct got_error *err = NULL;
5602 	char *path;
5603 
5604 	*new_view = NULL;
5605 
5606 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5607 	if (log_view == NULL)
5608 		return got_error_from_errno("view_open");
5609 
5610 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5611 	if (err)
5612 		return err;
5613 
5614 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5615 	    path, 0);
5616 	if (err)
5617 		view_close(log_view);
5618 	else
5619 		*new_view = log_view;
5620 	free(path);
5621 	return err;
5622 }
5623 
5624 static const struct got_error *
5625 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5626     const char *head_ref_name, struct got_repository *repo)
5627 {
5628 	const struct got_error *err = NULL;
5629 	char *commit_id_str = NULL;
5630 	struct tog_tree_view_state *s = &view->state.tree;
5631 	struct got_commit_object *commit = NULL;
5632 
5633 	TAILQ_INIT(&s->parents);
5634 	STAILQ_INIT(&s->colors);
5635 
5636 	s->commit_id = got_object_id_dup(commit_id);
5637 	if (s->commit_id == NULL)
5638 		return got_error_from_errno("got_object_id_dup");
5639 
5640 	err = got_object_open_as_commit(&commit, repo, commit_id);
5641 	if (err)
5642 		goto done;
5643 
5644 	/*
5645 	 * The root is opened here and will be closed when the view is closed.
5646 	 * Any visited subtrees and their path-wise parents are opened and
5647 	 * closed on demand.
5648 	 */
5649 	err = got_object_open_as_tree(&s->root, repo,
5650 	    got_object_commit_get_tree_id(commit));
5651 	if (err)
5652 		goto done;
5653 	s->tree = s->root;
5654 
5655 	err = got_object_id_str(&commit_id_str, commit_id);
5656 	if (err != NULL)
5657 		goto done;
5658 
5659 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5660 		err = got_error_from_errno("asprintf");
5661 		goto done;
5662 	}
5663 
5664 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5665 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5666 	if (head_ref_name) {
5667 		s->head_ref_name = strdup(head_ref_name);
5668 		if (s->head_ref_name == NULL) {
5669 			err = got_error_from_errno("strdup");
5670 			goto done;
5671 		}
5672 	}
5673 	s->repo = repo;
5674 
5675 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5676 		err = add_color(&s->colors, "\\$$",
5677 		    TOG_COLOR_TREE_SUBMODULE,
5678 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5679 		if (err)
5680 			goto done;
5681 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5682 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5683 		if (err)
5684 			goto done;
5685 		err = add_color(&s->colors, "/$",
5686 		    TOG_COLOR_TREE_DIRECTORY,
5687 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5688 		if (err)
5689 			goto done;
5690 
5691 		err = add_color(&s->colors, "\\*$",
5692 		    TOG_COLOR_TREE_EXECUTABLE,
5693 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5694 		if (err)
5695 			goto done;
5696 
5697 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5698 		    get_color_value("TOG_COLOR_COMMIT"));
5699 		if (err)
5700 			goto done;
5701 	}
5702 
5703 	view->show = show_tree_view;
5704 	view->input = input_tree_view;
5705 	view->close = close_tree_view;
5706 	view->search_start = search_start_tree_view;
5707 	view->search_next = search_next_tree_view;
5708 done:
5709 	free(commit_id_str);
5710 	if (commit)
5711 		got_object_commit_close(commit);
5712 	if (err)
5713 		close_tree_view(view);
5714 	return err;
5715 }
5716 
5717 static const struct got_error *
5718 close_tree_view(struct tog_view *view)
5719 {
5720 	struct tog_tree_view_state *s = &view->state.tree;
5721 
5722 	free_colors(&s->colors);
5723 	free(s->tree_label);
5724 	s->tree_label = NULL;
5725 	free(s->commit_id);
5726 	s->commit_id = NULL;
5727 	free(s->head_ref_name);
5728 	s->head_ref_name = NULL;
5729 	while (!TAILQ_EMPTY(&s->parents)) {
5730 		struct tog_parent_tree *parent;
5731 		parent = TAILQ_FIRST(&s->parents);
5732 		TAILQ_REMOVE(&s->parents, parent, entry);
5733 		if (parent->tree != s->root)
5734 			got_object_tree_close(parent->tree);
5735 		free(parent);
5736 
5737 	}
5738 	if (s->tree != NULL && s->tree != s->root)
5739 		got_object_tree_close(s->tree);
5740 	if (s->root)
5741 		got_object_tree_close(s->root);
5742 	return NULL;
5743 }
5744 
5745 static const struct got_error *
5746 search_start_tree_view(struct tog_view *view)
5747 {
5748 	struct tog_tree_view_state *s = &view->state.tree;
5749 
5750 	s->matched_entry = NULL;
5751 	return NULL;
5752 }
5753 
5754 static int
5755 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5756 {
5757 	regmatch_t regmatch;
5758 
5759 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5760 	    0) == 0;
5761 }
5762 
5763 static const struct got_error *
5764 search_next_tree_view(struct tog_view *view)
5765 {
5766 	struct tog_tree_view_state *s = &view->state.tree;
5767 	struct got_tree_entry *te = NULL;
5768 
5769 	if (!view->searching) {
5770 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5771 		return NULL;
5772 	}
5773 
5774 	if (s->matched_entry) {
5775 		if (view->searching == TOG_SEARCH_FORWARD) {
5776 			if (s->selected_entry)
5777 				te = got_tree_entry_get_next(s->tree,
5778 				    s->selected_entry);
5779 			else
5780 				te = got_object_tree_get_first_entry(s->tree);
5781 		} else {
5782 			if (s->selected_entry == NULL)
5783 				te = got_object_tree_get_last_entry(s->tree);
5784 			else
5785 				te = got_tree_entry_get_prev(s->tree,
5786 				    s->selected_entry);
5787 		}
5788 	} else {
5789 		if (s->selected_entry)
5790 			te = s->selected_entry;
5791 		else if (view->searching == TOG_SEARCH_FORWARD)
5792 			te = got_object_tree_get_first_entry(s->tree);
5793 		else
5794 			te = got_object_tree_get_last_entry(s->tree);
5795 	}
5796 
5797 	while (1) {
5798 		if (te == NULL) {
5799 			if (s->matched_entry == NULL) {
5800 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5801 				return NULL;
5802 			}
5803 			if (view->searching == TOG_SEARCH_FORWARD)
5804 				te = got_object_tree_get_first_entry(s->tree);
5805 			else
5806 				te = got_object_tree_get_last_entry(s->tree);
5807 		}
5808 
5809 		if (match_tree_entry(te, &view->regex)) {
5810 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5811 			s->matched_entry = te;
5812 			break;
5813 		}
5814 
5815 		if (view->searching == TOG_SEARCH_FORWARD)
5816 			te = got_tree_entry_get_next(s->tree, te);
5817 		else
5818 			te = got_tree_entry_get_prev(s->tree, te);
5819 	}
5820 
5821 	if (s->matched_entry) {
5822 		s->first_displayed_entry = s->matched_entry;
5823 		s->selected = 0;
5824 	}
5825 
5826 	return NULL;
5827 }
5828 
5829 static const struct got_error *
5830 show_tree_view(struct tog_view *view)
5831 {
5832 	const struct got_error *err = NULL;
5833 	struct tog_tree_view_state *s = &view->state.tree;
5834 	char *parent_path;
5835 
5836 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5837 	if (err)
5838 		return err;
5839 
5840 	err = draw_tree_entries(view, parent_path);
5841 	free(parent_path);
5842 
5843 	view_vborder(view);
5844 	return err;
5845 }
5846 
5847 static const struct got_error *
5848 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5849 {
5850 	const struct got_error *err = NULL;
5851 	struct tog_tree_view_state *s = &view->state.tree;
5852 	struct tog_view *log_view, *ref_view;
5853 	struct got_tree_entry *te;
5854 	int begin_x = 0, n, nscroll = view->nlines - 3;
5855 
5856 	switch (ch) {
5857 	case 'i':
5858 		s->show_ids = !s->show_ids;
5859 		break;
5860 	case 'l':
5861 		if (!s->selected_entry)
5862 			break;
5863 		if (view_is_parent_view(view))
5864 			begin_x = view_split_begin_x(view->begin_x);
5865 		err = log_selected_tree_entry(&log_view, begin_x, s);
5866 		view->focussed = 0;
5867 		log_view->focussed = 1;
5868 		if (view_is_parent_view(view)) {
5869 			err = view_close_child(view);
5870 			if (err)
5871 				return err;
5872 			err = view_set_child(view, log_view);
5873 			if (err)
5874 				return err;
5875 			view->focus_child = 1;
5876 		} else
5877 			*new_view = log_view;
5878 		break;
5879 	case 'r':
5880 		if (view_is_parent_view(view))
5881 			begin_x = view_split_begin_x(view->begin_x);
5882 		ref_view = view_open(view->nlines, view->ncols,
5883 		    view->begin_y, begin_x, TOG_VIEW_REF);
5884 		if (ref_view == NULL)
5885 			return got_error_from_errno("view_open");
5886 		err = open_ref_view(ref_view, s->repo);
5887 		if (err) {
5888 			view_close(ref_view);
5889 			return err;
5890 		}
5891 		view->focussed = 0;
5892 		ref_view->focussed = 1;
5893 		if (view_is_parent_view(view)) {
5894 			err = view_close_child(view);
5895 			if (err)
5896 				return err;
5897 			err = view_set_child(view, ref_view);
5898 			if (err)
5899 				return err;
5900 			view->focus_child = 1;
5901 		} else
5902 			*new_view = ref_view;
5903 		break;
5904 	case 'g':
5905 	case KEY_HOME:
5906 		s->selected = 0;
5907 		if (s->tree == s->root)
5908 			s->first_displayed_entry =
5909 			    got_object_tree_get_first_entry(s->tree);
5910 		else
5911 			s->first_displayed_entry = NULL;
5912 		break;
5913 	case 'G':
5914 	case KEY_END:
5915 		s->selected = 0;
5916 		te = got_object_tree_get_last_entry(s->tree);
5917 		for (n = 0; n < view->nlines - 3; n++) {
5918 			if (te == NULL) {
5919 				if(s->tree != s->root) {
5920 					s->first_displayed_entry = NULL;
5921 					n++;
5922 				}
5923 				break;
5924 			}
5925 			s->first_displayed_entry = te;
5926 			te = got_tree_entry_get_prev(s->tree, te);
5927 		}
5928 		if (n > 0)
5929 			s->selected = n - 1;
5930 		break;
5931 	case 'k':
5932 	case KEY_UP:
5933 	case CTRL('p'):
5934 		if (s->selected > 0) {
5935 			s->selected--;
5936 			break;
5937 		}
5938 		tree_scroll_up(s, 1);
5939 		break;
5940 	case CTRL('u'):
5941 	case 'u':
5942 		nscroll /= 2;
5943 		/* FALL THROUGH */
5944 	case KEY_PPAGE:
5945 	case CTRL('b'):
5946 		if (s->tree == s->root) {
5947 			if (got_object_tree_get_first_entry(s->tree) ==
5948 			    s->first_displayed_entry)
5949 				s->selected -= MIN(s->selected, nscroll);
5950 		} else {
5951 			if (s->first_displayed_entry == NULL)
5952 				s->selected -= MIN(s->selected, nscroll);
5953 		}
5954 		tree_scroll_up(s, MAX(0, nscroll));
5955 		break;
5956 	case 'j':
5957 	case KEY_DOWN:
5958 	case CTRL('n'):
5959 		if (s->selected < s->ndisplayed - 1) {
5960 			s->selected++;
5961 			break;
5962 		}
5963 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5964 		    == NULL)
5965 			/* can't scroll any further */
5966 			break;
5967 		tree_scroll_down(s, 1);
5968 		break;
5969 	case CTRL('d'):
5970 	case 'd':
5971 		nscroll /= 2;
5972 		/* FALL THROUGH */
5973 	case KEY_NPAGE:
5974 	case CTRL('f'):
5975 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5976 		    == NULL) {
5977 			/* can't scroll any further; move cursor down */
5978 			if (s->selected < s->ndisplayed - 1)
5979 				s->selected += MIN(nscroll,
5980 				    s->ndisplayed - s->selected - 1);
5981 			break;
5982 		}
5983 		tree_scroll_down(s, nscroll);
5984 		break;
5985 	case KEY_ENTER:
5986 	case '\r':
5987 	case KEY_BACKSPACE:
5988 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5989 			struct tog_parent_tree *parent;
5990 			/* user selected '..' */
5991 			if (s->tree == s->root)
5992 				break;
5993 			parent = TAILQ_FIRST(&s->parents);
5994 			TAILQ_REMOVE(&s->parents, parent,
5995 			    entry);
5996 			got_object_tree_close(s->tree);
5997 			s->tree = parent->tree;
5998 			s->first_displayed_entry =
5999 			    parent->first_displayed_entry;
6000 			s->selected_entry =
6001 			    parent->selected_entry;
6002 			s->selected = parent->selected;
6003 			free(parent);
6004 		} else if (S_ISDIR(got_tree_entry_get_mode(
6005 		    s->selected_entry))) {
6006 			struct got_tree_object *subtree;
6007 			err = got_object_open_as_tree(&subtree, s->repo,
6008 			    got_tree_entry_get_id(s->selected_entry));
6009 			if (err)
6010 				break;
6011 			err = tree_view_visit_subtree(s, subtree);
6012 			if (err) {
6013 				got_object_tree_close(subtree);
6014 				break;
6015 			}
6016 		} else if (S_ISREG(got_tree_entry_get_mode(
6017 		    s->selected_entry))) {
6018 			struct tog_view *blame_view;
6019 			int begin_x = view_is_parent_view(view) ?
6020 			    view_split_begin_x(view->begin_x) : 0;
6021 
6022 			err = blame_tree_entry(&blame_view, begin_x,
6023 			    s->selected_entry, &s->parents,
6024 			    s->commit_id, s->repo);
6025 			if (err)
6026 				break;
6027 			view->focussed = 0;
6028 			blame_view->focussed = 1;
6029 			if (view_is_parent_view(view)) {
6030 				err = view_close_child(view);
6031 				if (err)
6032 					return err;
6033 				err = view_set_child(view, blame_view);
6034 				if (err)
6035 					return err;
6036 				view->focus_child = 1;
6037 			} else
6038 				*new_view = blame_view;
6039 		}
6040 		break;
6041 	case KEY_RESIZE:
6042 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6043 			s->selected = view->nlines - 4;
6044 		break;
6045 	default:
6046 		break;
6047 	}
6048 
6049 	return err;
6050 }
6051 
6052 __dead static void
6053 usage_tree(void)
6054 {
6055 	endwin();
6056 	fprintf(stderr,
6057 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6058 	    getprogname());
6059 	exit(1);
6060 }
6061 
6062 static const struct got_error *
6063 cmd_tree(int argc, char *argv[])
6064 {
6065 	const struct got_error *error;
6066 	struct got_repository *repo = NULL;
6067 	struct got_worktree *worktree = NULL;
6068 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6069 	struct got_object_id *commit_id = NULL;
6070 	struct got_commit_object *commit = NULL;
6071 	const char *commit_id_arg = NULL;
6072 	char *label = NULL;
6073 	struct got_reference *ref = NULL;
6074 	const char *head_ref_name = NULL;
6075 	int ch;
6076 	struct tog_view *view;
6077 	int *pack_fds = NULL;
6078 
6079 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6080 		switch (ch) {
6081 		case 'c':
6082 			commit_id_arg = optarg;
6083 			break;
6084 		case 'r':
6085 			repo_path = realpath(optarg, NULL);
6086 			if (repo_path == NULL)
6087 				return got_error_from_errno2("realpath",
6088 				    optarg);
6089 			break;
6090 		default:
6091 			usage_tree();
6092 			/* NOTREACHED */
6093 		}
6094 	}
6095 
6096 	argc -= optind;
6097 	argv += optind;
6098 
6099 	if (argc > 1)
6100 		usage_tree();
6101 
6102 	error = got_repo_pack_fds_open(&pack_fds);
6103 	if (error != NULL)
6104 		goto done;
6105 
6106 	if (repo_path == NULL) {
6107 		cwd = getcwd(NULL, 0);
6108 		if (cwd == NULL)
6109 			return got_error_from_errno("getcwd");
6110 		error = got_worktree_open(&worktree, cwd);
6111 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6112 			goto done;
6113 		if (worktree)
6114 			repo_path =
6115 			    strdup(got_worktree_get_repo_path(worktree));
6116 		else
6117 			repo_path = strdup(cwd);
6118 		if (repo_path == NULL) {
6119 			error = got_error_from_errno("strdup");
6120 			goto done;
6121 		}
6122 	}
6123 
6124 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6125 	if (error != NULL)
6126 		goto done;
6127 
6128 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6129 	    repo, worktree);
6130 	if (error)
6131 		goto done;
6132 
6133 	init_curses();
6134 
6135 	error = apply_unveil(got_repo_get_path(repo), NULL);
6136 	if (error)
6137 		goto done;
6138 
6139 	error = tog_load_refs(repo, 0);
6140 	if (error)
6141 		goto done;
6142 
6143 	if (commit_id_arg == NULL) {
6144 		error = got_repo_match_object_id(&commit_id, &label,
6145 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6146 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6147 		if (error)
6148 			goto done;
6149 		head_ref_name = label;
6150 	} else {
6151 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6152 		if (error == NULL)
6153 			head_ref_name = got_ref_get_name(ref);
6154 		else if (error->code != GOT_ERR_NOT_REF)
6155 			goto done;
6156 		error = got_repo_match_object_id(&commit_id, NULL,
6157 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6158 		if (error)
6159 			goto done;
6160 	}
6161 
6162 	error = got_object_open_as_commit(&commit, repo, commit_id);
6163 	if (error)
6164 		goto done;
6165 
6166 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6167 	if (view == NULL) {
6168 		error = got_error_from_errno("view_open");
6169 		goto done;
6170 	}
6171 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6172 	if (error)
6173 		goto done;
6174 	if (!got_path_is_root_dir(in_repo_path)) {
6175 		error = tree_view_walk_path(&view->state.tree, commit,
6176 		    in_repo_path);
6177 		if (error)
6178 			goto done;
6179 	}
6180 
6181 	if (worktree) {
6182 		/* Release work tree lock. */
6183 		got_worktree_close(worktree);
6184 		worktree = NULL;
6185 	}
6186 	error = view_loop(view);
6187 done:
6188 	free(repo_path);
6189 	free(cwd);
6190 	free(commit_id);
6191 	free(label);
6192 	if (ref)
6193 		got_ref_close(ref);
6194 	if (repo) {
6195 		const struct got_error *close_err = got_repo_close(repo);
6196 		if (error == NULL)
6197 			error = close_err;
6198 	}
6199 	if (pack_fds) {
6200 		const struct got_error *pack_err =
6201 		    got_repo_pack_fds_close(pack_fds);
6202 		if (error == NULL)
6203 			error = pack_err;
6204 	}
6205 	tog_free_refs();
6206 	return error;
6207 }
6208 
6209 static const struct got_error *
6210 ref_view_load_refs(struct tog_ref_view_state *s)
6211 {
6212 	struct got_reflist_entry *sre;
6213 	struct tog_reflist_entry *re;
6214 
6215 	s->nrefs = 0;
6216 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6217 		if (strncmp(got_ref_get_name(sre->ref),
6218 		    "refs/got/", 9) == 0 &&
6219 		    strncmp(got_ref_get_name(sre->ref),
6220 		    "refs/got/backup/", 16) != 0)
6221 			continue;
6222 
6223 		re = malloc(sizeof(*re));
6224 		if (re == NULL)
6225 			return got_error_from_errno("malloc");
6226 
6227 		re->ref = got_ref_dup(sre->ref);
6228 		if (re->ref == NULL)
6229 			return got_error_from_errno("got_ref_dup");
6230 		re->idx = s->nrefs++;
6231 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6232 	}
6233 
6234 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6235 	return NULL;
6236 }
6237 
6238 void
6239 ref_view_free_refs(struct tog_ref_view_state *s)
6240 {
6241 	struct tog_reflist_entry *re;
6242 
6243 	while (!TAILQ_EMPTY(&s->refs)) {
6244 		re = TAILQ_FIRST(&s->refs);
6245 		TAILQ_REMOVE(&s->refs, re, entry);
6246 		got_ref_close(re->ref);
6247 		free(re);
6248 	}
6249 }
6250 
6251 static const struct got_error *
6252 open_ref_view(struct tog_view *view, struct got_repository *repo)
6253 {
6254 	const struct got_error *err = NULL;
6255 	struct tog_ref_view_state *s = &view->state.ref;
6256 
6257 	s->selected_entry = 0;
6258 	s->repo = repo;
6259 
6260 	TAILQ_INIT(&s->refs);
6261 	STAILQ_INIT(&s->colors);
6262 
6263 	err = ref_view_load_refs(s);
6264 	if (err)
6265 		return err;
6266 
6267 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6268 		err = add_color(&s->colors, "^refs/heads/",
6269 		    TOG_COLOR_REFS_HEADS,
6270 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6271 		if (err)
6272 			goto done;
6273 
6274 		err = add_color(&s->colors, "^refs/tags/",
6275 		    TOG_COLOR_REFS_TAGS,
6276 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6277 		if (err)
6278 			goto done;
6279 
6280 		err = add_color(&s->colors, "^refs/remotes/",
6281 		    TOG_COLOR_REFS_REMOTES,
6282 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6283 		if (err)
6284 			goto done;
6285 
6286 		err = add_color(&s->colors, "^refs/got/backup/",
6287 		    TOG_COLOR_REFS_BACKUP,
6288 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6289 		if (err)
6290 			goto done;
6291 	}
6292 
6293 	view->show = show_ref_view;
6294 	view->input = input_ref_view;
6295 	view->close = close_ref_view;
6296 	view->search_start = search_start_ref_view;
6297 	view->search_next = search_next_ref_view;
6298 done:
6299 	if (err)
6300 		free_colors(&s->colors);
6301 	return err;
6302 }
6303 
6304 static const struct got_error *
6305 close_ref_view(struct tog_view *view)
6306 {
6307 	struct tog_ref_view_state *s = &view->state.ref;
6308 
6309 	ref_view_free_refs(s);
6310 	free_colors(&s->colors);
6311 
6312 	return NULL;
6313 }
6314 
6315 static const struct got_error *
6316 resolve_reflist_entry(struct got_object_id **commit_id,
6317     struct tog_reflist_entry *re, struct got_repository *repo)
6318 {
6319 	const struct got_error *err = NULL;
6320 	struct got_object_id *obj_id;
6321 	struct got_tag_object *tag = NULL;
6322 	int obj_type;
6323 
6324 	*commit_id = NULL;
6325 
6326 	err = got_ref_resolve(&obj_id, repo, re->ref);
6327 	if (err)
6328 		return err;
6329 
6330 	err = got_object_get_type(&obj_type, repo, obj_id);
6331 	if (err)
6332 		goto done;
6333 
6334 	switch (obj_type) {
6335 	case GOT_OBJ_TYPE_COMMIT:
6336 		*commit_id = obj_id;
6337 		break;
6338 	case GOT_OBJ_TYPE_TAG:
6339 		err = got_object_open_as_tag(&tag, repo, obj_id);
6340 		if (err)
6341 			goto done;
6342 		free(obj_id);
6343 		err = got_object_get_type(&obj_type, repo,
6344 		    got_object_tag_get_object_id(tag));
6345 		if (err)
6346 			goto done;
6347 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6348 			err = got_error(GOT_ERR_OBJ_TYPE);
6349 			goto done;
6350 		}
6351 		*commit_id = got_object_id_dup(
6352 		    got_object_tag_get_object_id(tag));
6353 		if (*commit_id == NULL) {
6354 			err = got_error_from_errno("got_object_id_dup");
6355 			goto done;
6356 		}
6357 		break;
6358 	default:
6359 		err = got_error(GOT_ERR_OBJ_TYPE);
6360 		break;
6361 	}
6362 
6363 done:
6364 	if (tag)
6365 		got_object_tag_close(tag);
6366 	if (err) {
6367 		free(*commit_id);
6368 		*commit_id = NULL;
6369 	}
6370 	return err;
6371 }
6372 
6373 static const struct got_error *
6374 log_ref_entry(struct tog_view **new_view, int begin_x,
6375     struct tog_reflist_entry *re, struct got_repository *repo)
6376 {
6377 	struct tog_view *log_view;
6378 	const struct got_error *err = NULL;
6379 	struct got_object_id *commit_id = NULL;
6380 
6381 	*new_view = NULL;
6382 
6383 	err = resolve_reflist_entry(&commit_id, re, repo);
6384 	if (err) {
6385 		if (err->code != GOT_ERR_OBJ_TYPE)
6386 			return err;
6387 		else
6388 			return NULL;
6389 	}
6390 
6391 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6392 	if (log_view == NULL) {
6393 		err = got_error_from_errno("view_open");
6394 		goto done;
6395 	}
6396 
6397 	err = open_log_view(log_view, commit_id, repo,
6398 	    got_ref_get_name(re->ref), "", 0);
6399 done:
6400 	if (err)
6401 		view_close(log_view);
6402 	else
6403 		*new_view = log_view;
6404 	free(commit_id);
6405 	return err;
6406 }
6407 
6408 static void
6409 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6410 {
6411 	struct tog_reflist_entry *re;
6412 	int i = 0;
6413 
6414 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6415 		return;
6416 
6417 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6418 	while (i++ < maxscroll) {
6419 		if (re == NULL)
6420 			break;
6421 		s->first_displayed_entry = re;
6422 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6423 	}
6424 }
6425 
6426 static void
6427 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6428 {
6429 	struct tog_reflist_entry *next, *last;
6430 	int n = 0;
6431 
6432 	if (s->first_displayed_entry)
6433 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6434 	else
6435 		next = TAILQ_FIRST(&s->refs);
6436 
6437 	last = s->last_displayed_entry;
6438 	while (next && last && n++ < maxscroll) {
6439 		last = TAILQ_NEXT(last, entry);
6440 		if (last) {
6441 			s->first_displayed_entry = next;
6442 			next = TAILQ_NEXT(next, entry);
6443 		}
6444 	}
6445 }
6446 
6447 static const struct got_error *
6448 search_start_ref_view(struct tog_view *view)
6449 {
6450 	struct tog_ref_view_state *s = &view->state.ref;
6451 
6452 	s->matched_entry = NULL;
6453 	return NULL;
6454 }
6455 
6456 static int
6457 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6458 {
6459 	regmatch_t regmatch;
6460 
6461 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6462 	    0) == 0;
6463 }
6464 
6465 static const struct got_error *
6466 search_next_ref_view(struct tog_view *view)
6467 {
6468 	struct tog_ref_view_state *s = &view->state.ref;
6469 	struct tog_reflist_entry *re = NULL;
6470 
6471 	if (!view->searching) {
6472 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6473 		return NULL;
6474 	}
6475 
6476 	if (s->matched_entry) {
6477 		if (view->searching == TOG_SEARCH_FORWARD) {
6478 			if (s->selected_entry)
6479 				re = TAILQ_NEXT(s->selected_entry, entry);
6480 			else
6481 				re = TAILQ_PREV(s->selected_entry,
6482 				    tog_reflist_head, entry);
6483 		} else {
6484 			if (s->selected_entry == NULL)
6485 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6486 			else
6487 				re = TAILQ_PREV(s->selected_entry,
6488 				    tog_reflist_head, entry);
6489 		}
6490 	} else {
6491 		if (s->selected_entry)
6492 			re = s->selected_entry;
6493 		else if (view->searching == TOG_SEARCH_FORWARD)
6494 			re = TAILQ_FIRST(&s->refs);
6495 		else
6496 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6497 	}
6498 
6499 	while (1) {
6500 		if (re == NULL) {
6501 			if (s->matched_entry == NULL) {
6502 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6503 				return NULL;
6504 			}
6505 			if (view->searching == TOG_SEARCH_FORWARD)
6506 				re = TAILQ_FIRST(&s->refs);
6507 			else
6508 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6509 		}
6510 
6511 		if (match_reflist_entry(re, &view->regex)) {
6512 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6513 			s->matched_entry = re;
6514 			break;
6515 		}
6516 
6517 		if (view->searching == TOG_SEARCH_FORWARD)
6518 			re = TAILQ_NEXT(re, entry);
6519 		else
6520 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6521 	}
6522 
6523 	if (s->matched_entry) {
6524 		s->first_displayed_entry = s->matched_entry;
6525 		s->selected = 0;
6526 	}
6527 
6528 	return NULL;
6529 }
6530 
6531 static const struct got_error *
6532 show_ref_view(struct tog_view *view)
6533 {
6534 	const struct got_error *err = NULL;
6535 	struct tog_ref_view_state *s = &view->state.ref;
6536 	struct tog_reflist_entry *re;
6537 	char *line = NULL;
6538 	wchar_t *wline;
6539 	struct tog_color *tc;
6540 	int width, n;
6541 	int limit = view->nlines;
6542 
6543 	werase(view->window);
6544 
6545 	s->ndisplayed = 0;
6546 
6547 	if (limit == 0)
6548 		return NULL;
6549 
6550 	re = s->first_displayed_entry;
6551 
6552 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6553 	    s->nrefs) == -1)
6554 		return got_error_from_errno("asprintf");
6555 
6556 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6557 	if (err) {
6558 		free(line);
6559 		return err;
6560 	}
6561 	if (view_needs_focus_indication(view))
6562 		wstandout(view->window);
6563 	waddwstr(view->window, wline);
6564 	if (view_needs_focus_indication(view))
6565 		wstandend(view->window);
6566 	free(wline);
6567 	wline = NULL;
6568 	free(line);
6569 	line = NULL;
6570 	if (width < view->ncols - 1)
6571 		waddch(view->window, '\n');
6572 	if (--limit <= 0)
6573 		return NULL;
6574 
6575 	n = 0;
6576 	while (re && limit > 0) {
6577 		char *line = NULL;
6578 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6579 
6580 		if (s->show_date) {
6581 			struct got_commit_object *ci;
6582 			struct got_tag_object *tag;
6583 			struct got_object_id *id;
6584 			struct tm tm;
6585 			time_t t;
6586 
6587 			err = got_ref_resolve(&id, s->repo, re->ref);
6588 			if (err)
6589 				return err;
6590 			err = got_object_open_as_tag(&tag, s->repo, id);
6591 			if (err) {
6592 				if (err->code != GOT_ERR_OBJ_TYPE) {
6593 					free(id);
6594 					return err;
6595 				}
6596 				err = got_object_open_as_commit(&ci, s->repo,
6597 				    id);
6598 				if (err) {
6599 					free(id);
6600 					return err;
6601 				}
6602 				t = got_object_commit_get_committer_time(ci);
6603 				got_object_commit_close(ci);
6604 			} else {
6605 				t = got_object_tag_get_tagger_time(tag);
6606 				got_object_tag_close(tag);
6607 			}
6608 			free(id);
6609 			if (gmtime_r(&t, &tm) == NULL)
6610 				return got_error_from_errno("gmtime_r");
6611 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6612 				return got_error(GOT_ERR_NO_SPACE);
6613 		}
6614 		if (got_ref_is_symbolic(re->ref)) {
6615 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6616 			    ymd : "", got_ref_get_name(re->ref),
6617 			    got_ref_get_symref_target(re->ref)) == -1)
6618 				return got_error_from_errno("asprintf");
6619 		} else if (s->show_ids) {
6620 			struct got_object_id *id;
6621 			char *id_str;
6622 			err = got_ref_resolve(&id, s->repo, re->ref);
6623 			if (err)
6624 				return err;
6625 			err = got_object_id_str(&id_str, id);
6626 			if (err) {
6627 				free(id);
6628 				return err;
6629 			}
6630 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6631 			    got_ref_get_name(re->ref), id_str) == -1) {
6632 				err = got_error_from_errno("asprintf");
6633 				free(id);
6634 				free(id_str);
6635 				return err;
6636 			}
6637 			free(id);
6638 			free(id_str);
6639 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6640 		    got_ref_get_name(re->ref)) == -1)
6641 			return got_error_from_errno("asprintf");
6642 
6643 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6644 		    0, 0);
6645 		if (err) {
6646 			free(line);
6647 			return err;
6648 		}
6649 		if (n == s->selected) {
6650 			if (view->focussed)
6651 				wstandout(view->window);
6652 			s->selected_entry = re;
6653 		}
6654 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6655 		if (tc)
6656 			wattr_on(view->window,
6657 			    COLOR_PAIR(tc->colorpair), NULL);
6658 		waddwstr(view->window, wline);
6659 		if (tc)
6660 			wattr_off(view->window,
6661 			    COLOR_PAIR(tc->colorpair), NULL);
6662 		if (width < view->ncols - 1)
6663 			waddch(view->window, '\n');
6664 		if (n == s->selected && view->focussed)
6665 			wstandend(view->window);
6666 		free(line);
6667 		free(wline);
6668 		wline = NULL;
6669 		n++;
6670 		s->ndisplayed++;
6671 		s->last_displayed_entry = re;
6672 
6673 		limit--;
6674 		re = TAILQ_NEXT(re, entry);
6675 	}
6676 
6677 	view_vborder(view);
6678 	return err;
6679 }
6680 
6681 static const struct got_error *
6682 browse_ref_tree(struct tog_view **new_view, int begin_x,
6683     struct tog_reflist_entry *re, struct got_repository *repo)
6684 {
6685 	const struct got_error *err = NULL;
6686 	struct got_object_id *commit_id = NULL;
6687 	struct tog_view *tree_view;
6688 
6689 	*new_view = NULL;
6690 
6691 	err = resolve_reflist_entry(&commit_id, re, repo);
6692 	if (err) {
6693 		if (err->code != GOT_ERR_OBJ_TYPE)
6694 			return err;
6695 		else
6696 			return NULL;
6697 	}
6698 
6699 
6700 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6701 	if (tree_view == NULL) {
6702 		err = got_error_from_errno("view_open");
6703 		goto done;
6704 	}
6705 
6706 	err = open_tree_view(tree_view, commit_id,
6707 	    got_ref_get_name(re->ref), repo);
6708 	if (err)
6709 		goto done;
6710 
6711 	*new_view = tree_view;
6712 done:
6713 	free(commit_id);
6714 	return err;
6715 }
6716 static const struct got_error *
6717 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6718 {
6719 	const struct got_error *err = NULL;
6720 	struct tog_ref_view_state *s = &view->state.ref;
6721 	struct tog_view *log_view, *tree_view;
6722 	struct tog_reflist_entry *re;
6723 	int begin_x = 0, n, nscroll = view->nlines - 1;
6724 
6725 	switch (ch) {
6726 	case 'i':
6727 		s->show_ids = !s->show_ids;
6728 		break;
6729 	case 'm':
6730 		s->show_date = !s->show_date;
6731 		break;
6732 	case 'o':
6733 		s->sort_by_date = !s->sort_by_date;
6734 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6735 		    got_ref_cmp_by_commit_timestamp_descending :
6736 		    tog_ref_cmp_by_name, s->repo);
6737 		if (err)
6738 			break;
6739 		got_reflist_object_id_map_free(tog_refs_idmap);
6740 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6741 		    &tog_refs, s->repo);
6742 		if (err)
6743 			break;
6744 		ref_view_free_refs(s);
6745 		err = ref_view_load_refs(s);
6746 		break;
6747 	case KEY_ENTER:
6748 	case '\r':
6749 		if (!s->selected_entry)
6750 			break;
6751 		if (view_is_parent_view(view))
6752 			begin_x = view_split_begin_x(view->begin_x);
6753 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6754 		    s->repo);
6755 		view->focussed = 0;
6756 		log_view->focussed = 1;
6757 		if (view_is_parent_view(view)) {
6758 			err = view_close_child(view);
6759 			if (err)
6760 				return err;
6761 			err = view_set_child(view, log_view);
6762 			if (err)
6763 				return err;
6764 			view->focus_child = 1;
6765 		} else
6766 			*new_view = log_view;
6767 		break;
6768 	case 't':
6769 		if (!s->selected_entry)
6770 			break;
6771 		if (view_is_parent_view(view))
6772 			begin_x = view_split_begin_x(view->begin_x);
6773 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6774 		    s->repo);
6775 		if (err || tree_view == NULL)
6776 			break;
6777 		view->focussed = 0;
6778 		tree_view->focussed = 1;
6779 		if (view_is_parent_view(view)) {
6780 			err = view_close_child(view);
6781 			if (err)
6782 				return err;
6783 			err = view_set_child(view, tree_view);
6784 			if (err)
6785 				return err;
6786 			view->focus_child = 1;
6787 		} else
6788 			*new_view = tree_view;
6789 		break;
6790 	case 'g':
6791 	case KEY_HOME:
6792 		s->selected = 0;
6793 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6794 		break;
6795 	case 'G':
6796 	case KEY_END:
6797 		s->selected = 0;
6798 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6799 		for (n = 0; n < view->nlines - 1; n++) {
6800 			if (re == NULL)
6801 				break;
6802 			s->first_displayed_entry = re;
6803 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6804 		}
6805 		if (n > 0)
6806 			s->selected = n - 1;
6807 		break;
6808 	case 'k':
6809 	case KEY_UP:
6810 	case CTRL('p'):
6811 		if (s->selected > 0) {
6812 			s->selected--;
6813 			break;
6814 		}
6815 		ref_scroll_up(s, 1);
6816 		break;
6817 	case CTRL('u'):
6818 	case 'u':
6819 		nscroll /= 2;
6820 		/* FALL THROUGH */
6821 	case KEY_PPAGE:
6822 	case CTRL('b'):
6823 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6824 			s->selected -= MIN(nscroll, s->selected);
6825 		ref_scroll_up(s, MAX(0, nscroll));
6826 		break;
6827 	case 'j':
6828 	case KEY_DOWN:
6829 	case CTRL('n'):
6830 		if (s->selected < s->ndisplayed - 1) {
6831 			s->selected++;
6832 			break;
6833 		}
6834 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6835 			/* can't scroll any further */
6836 			break;
6837 		ref_scroll_down(s, 1);
6838 		break;
6839 	case CTRL('d'):
6840 	case 'd':
6841 		nscroll /= 2;
6842 		/* FALL THROUGH */
6843 	case KEY_NPAGE:
6844 	case CTRL('f'):
6845 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6846 			/* can't scroll any further; move cursor down */
6847 			if (s->selected < s->ndisplayed - 1)
6848 				s->selected += MIN(nscroll,
6849 				    s->ndisplayed - s->selected - 1);
6850 			break;
6851 		}
6852 		ref_scroll_down(s, nscroll);
6853 		break;
6854 	case CTRL('l'):
6855 		tog_free_refs();
6856 		err = tog_load_refs(s->repo, s->sort_by_date);
6857 		if (err)
6858 			break;
6859 		ref_view_free_refs(s);
6860 		err = ref_view_load_refs(s);
6861 		break;
6862 	case KEY_RESIZE:
6863 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6864 			s->selected = view->nlines - 2;
6865 		break;
6866 	default:
6867 		break;
6868 	}
6869 
6870 	return err;
6871 }
6872 
6873 __dead static void
6874 usage_ref(void)
6875 {
6876 	endwin();
6877 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6878 	    getprogname());
6879 	exit(1);
6880 }
6881 
6882 static const struct got_error *
6883 cmd_ref(int argc, char *argv[])
6884 {
6885 	const struct got_error *error;
6886 	struct got_repository *repo = NULL;
6887 	struct got_worktree *worktree = NULL;
6888 	char *cwd = NULL, *repo_path = NULL;
6889 	int ch;
6890 	struct tog_view *view;
6891 	int *pack_fds = NULL;
6892 
6893 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6894 		switch (ch) {
6895 		case 'r':
6896 			repo_path = realpath(optarg, NULL);
6897 			if (repo_path == NULL)
6898 				return got_error_from_errno2("realpath",
6899 				    optarg);
6900 			break;
6901 		default:
6902 			usage_ref();
6903 			/* NOTREACHED */
6904 		}
6905 	}
6906 
6907 	argc -= optind;
6908 	argv += optind;
6909 
6910 	if (argc > 1)
6911 		usage_ref();
6912 
6913 	error = got_repo_pack_fds_open(&pack_fds);
6914 	if (error != NULL)
6915 		goto done;
6916 
6917 	if (repo_path == NULL) {
6918 		cwd = getcwd(NULL, 0);
6919 		if (cwd == NULL)
6920 			return got_error_from_errno("getcwd");
6921 		error = got_worktree_open(&worktree, cwd);
6922 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6923 			goto done;
6924 		if (worktree)
6925 			repo_path =
6926 			    strdup(got_worktree_get_repo_path(worktree));
6927 		else
6928 			repo_path = strdup(cwd);
6929 		if (repo_path == NULL) {
6930 			error = got_error_from_errno("strdup");
6931 			goto done;
6932 		}
6933 	}
6934 
6935 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6936 	if (error != NULL)
6937 		goto done;
6938 
6939 	init_curses();
6940 
6941 	error = apply_unveil(got_repo_get_path(repo), NULL);
6942 	if (error)
6943 		goto done;
6944 
6945 	error = tog_load_refs(repo, 0);
6946 	if (error)
6947 		goto done;
6948 
6949 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6950 	if (view == NULL) {
6951 		error = got_error_from_errno("view_open");
6952 		goto done;
6953 	}
6954 
6955 	error = open_ref_view(view, repo);
6956 	if (error)
6957 		goto done;
6958 
6959 	if (worktree) {
6960 		/* Release work tree lock. */
6961 		got_worktree_close(worktree);
6962 		worktree = NULL;
6963 	}
6964 	error = view_loop(view);
6965 done:
6966 	free(repo_path);
6967 	free(cwd);
6968 	if (repo) {
6969 		const struct got_error *close_err = got_repo_close(repo);
6970 		if (close_err)
6971 			error = close_err;
6972 	}
6973 	if (pack_fds) {
6974 		const struct got_error *pack_err =
6975 		    got_repo_pack_fds_close(pack_fds);
6976 		if (error == NULL)
6977 			error = pack_err;
6978 	}
6979 	tog_free_refs();
6980 	return error;
6981 }
6982 
6983 static void
6984 list_commands(FILE *fp)
6985 {
6986 	size_t i;
6987 
6988 	fprintf(fp, "commands:");
6989 	for (i = 0; i < nitems(tog_commands); i++) {
6990 		const struct tog_cmd *cmd = &tog_commands[i];
6991 		fprintf(fp, " %s", cmd->name);
6992 	}
6993 	fputc('\n', fp);
6994 }
6995 
6996 __dead static void
6997 usage(int hflag, int status)
6998 {
6999 	FILE *fp = (status == 0) ? stdout : stderr;
7000 
7001 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7002 	    getprogname());
7003 	if (hflag) {
7004 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7005 		list_commands(fp);
7006 	}
7007 	exit(status);
7008 }
7009 
7010 static char **
7011 make_argv(int argc, ...)
7012 {
7013 	va_list ap;
7014 	char **argv;
7015 	int i;
7016 
7017 	va_start(ap, argc);
7018 
7019 	argv = calloc(argc, sizeof(char *));
7020 	if (argv == NULL)
7021 		err(1, "calloc");
7022 	for (i = 0; i < argc; i++) {
7023 		argv[i] = strdup(va_arg(ap, char *));
7024 		if (argv[i] == NULL)
7025 			err(1, "strdup");
7026 	}
7027 
7028 	va_end(ap);
7029 	return argv;
7030 }
7031 
7032 /*
7033  * Try to convert 'tog path' into a 'tog log path' command.
7034  * The user could simply have mistyped the command rather than knowingly
7035  * provided a path. So check whether argv[0] can in fact be resolved
7036  * to a path in the HEAD commit and print a special error if not.
7037  * This hack is for mpi@ <3
7038  */
7039 static const struct got_error *
7040 tog_log_with_path(int argc, char *argv[])
7041 {
7042 	const struct got_error *error = NULL, *close_err;
7043 	const struct tog_cmd *cmd = NULL;
7044 	struct got_repository *repo = NULL;
7045 	struct got_worktree *worktree = NULL;
7046 	struct got_object_id *commit_id = NULL, *id = NULL;
7047 	struct got_commit_object *commit = NULL;
7048 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7049 	char *commit_id_str = NULL, **cmd_argv = NULL;
7050 	int *pack_fds = NULL;
7051 
7052 	cwd = getcwd(NULL, 0);
7053 	if (cwd == NULL)
7054 		return got_error_from_errno("getcwd");
7055 
7056 	error = got_repo_pack_fds_open(&pack_fds);
7057 	if (error != NULL)
7058 		goto done;
7059 
7060 	error = got_worktree_open(&worktree, cwd);
7061 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7062 		goto done;
7063 
7064 	if (worktree)
7065 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7066 	else
7067 		repo_path = strdup(cwd);
7068 	if (repo_path == NULL) {
7069 		error = got_error_from_errno("strdup");
7070 		goto done;
7071 	}
7072 
7073 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7074 	if (error != NULL)
7075 		goto done;
7076 
7077 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7078 	    repo, worktree);
7079 	if (error)
7080 		goto done;
7081 
7082 	error = tog_load_refs(repo, 0);
7083 	if (error)
7084 		goto done;
7085 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7086 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7087 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7088 	if (error)
7089 		goto done;
7090 
7091 	if (worktree) {
7092 		got_worktree_close(worktree);
7093 		worktree = NULL;
7094 	}
7095 
7096 	error = got_object_open_as_commit(&commit, repo, commit_id);
7097 	if (error)
7098 		goto done;
7099 
7100 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7101 	if (error) {
7102 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7103 			goto done;
7104 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7105 		    getprogname(), argv[0]);
7106 		usage(1, 1);
7107 		/* not reached */
7108 	}
7109 
7110 	close_err = got_repo_close(repo);
7111 	if (error == NULL)
7112 		error = close_err;
7113 	repo = NULL;
7114 
7115 	error = got_object_id_str(&commit_id_str, commit_id);
7116 	if (error)
7117 		goto done;
7118 
7119 	cmd = &tog_commands[0]; /* log */
7120 	argc = 4;
7121 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7122 	error = cmd->cmd_main(argc, cmd_argv);
7123 done:
7124 	if (repo) {
7125 		close_err = got_repo_close(repo);
7126 		if (error == NULL)
7127 			error = close_err;
7128 	}
7129 	if (commit)
7130 		got_object_commit_close(commit);
7131 	if (worktree)
7132 		got_worktree_close(worktree);
7133 	if (pack_fds) {
7134 		const struct got_error *pack_err =
7135 		    got_repo_pack_fds_close(pack_fds);
7136 		if (error == NULL)
7137 			error = pack_err;
7138 	}
7139 	free(id);
7140 	free(commit_id_str);
7141 	free(commit_id);
7142 	free(cwd);
7143 	free(repo_path);
7144 	free(in_repo_path);
7145 	if (cmd_argv) {
7146 		int i;
7147 		for (i = 0; i < argc; i++)
7148 			free(cmd_argv[i]);
7149 		free(cmd_argv);
7150 	}
7151 	tog_free_refs();
7152 	return error;
7153 }
7154 
7155 int
7156 main(int argc, char *argv[])
7157 {
7158 	const struct got_error *error = NULL;
7159 	const struct tog_cmd *cmd = NULL;
7160 	int ch, hflag = 0, Vflag = 0;
7161 	char **cmd_argv = NULL;
7162 	static const struct option longopts[] = {
7163 	    { "version", no_argument, NULL, 'V' },
7164 	    { NULL, 0, NULL, 0}
7165 	};
7166 
7167 	setlocale(LC_CTYPE, "");
7168 
7169 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7170 		switch (ch) {
7171 		case 'h':
7172 			hflag = 1;
7173 			break;
7174 		case 'V':
7175 			Vflag = 1;
7176 			break;
7177 		default:
7178 			usage(hflag, 1);
7179 			/* NOTREACHED */
7180 		}
7181 	}
7182 
7183 	argc -= optind;
7184 	argv += optind;
7185 	optind = 1;
7186 	optreset = 1;
7187 
7188 	if (Vflag) {
7189 		got_version_print_str();
7190 		return 0;
7191 	}
7192 
7193 #ifndef PROFILE
7194 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7195 	    NULL) == -1)
7196 		err(1, "pledge");
7197 #endif
7198 
7199 	if (argc == 0) {
7200 		if (hflag)
7201 			usage(hflag, 0);
7202 		/* Build an argument vector which runs a default command. */
7203 		cmd = &tog_commands[0];
7204 		argc = 1;
7205 		cmd_argv = make_argv(argc, cmd->name);
7206 	} else {
7207 		size_t i;
7208 
7209 		/* Did the user specify a command? */
7210 		for (i = 0; i < nitems(tog_commands); i++) {
7211 			if (strncmp(tog_commands[i].name, argv[0],
7212 			    strlen(argv[0])) == 0) {
7213 				cmd = &tog_commands[i];
7214 				break;
7215 			}
7216 		}
7217 	}
7218 
7219 	if (cmd == NULL) {
7220 		if (argc != 1)
7221 			usage(0, 1);
7222 		/* No command specified; try log with a path */
7223 		error = tog_log_with_path(argc, argv);
7224 	} else {
7225 		if (hflag)
7226 			cmd->cmd_usage();
7227 		else
7228 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7229 	}
7230 
7231 	endwin();
7232 	putchar('\n');
7233 	if (cmd_argv) {
7234 		int i;
7235 		for (i = 0; i < argc; i++)
7236 			free(cmd_argv[i]);
7237 		free(cmd_argv);
7238 	}
7239 
7240 	if (error && error->code != GOT_ERR_CANCELLED)
7241 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7242 	return 0;
7243 }