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