1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
24 #include <curses.h>
25 #include <panel.h>
26 #include <locale.h>
27 #include <sha1.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <getopt.h>
33 #include <string.h>
34 #include <err.h>
35 #include <unistd.h>
36 #include <limits.h>
37 #include <wchar.h>
38 #include <time.h>
39 #include <pthread.h>
40 #include <libgen.h>
41 #include <regex.h>
42 #include <sched.h>
43 
44 #include "got_version.h"
45 #include "got_error.h"
46 #include "got_object.h"
47 #include "got_reference.h"
48 #include "got_repository.h"
49 #include "got_diff.h"
50 #include "got_opentemp.h"
51 #include "got_utf8.h"
52 #include "got_cancel.h"
53 #include "got_commit_graph.h"
54 #include "got_blame.h"
55 #include "got_privsep.h"
56 #include "got_path.h"
57 #include "got_worktree.h"
58 
59 #ifndef MIN
60 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
61 #endif
62 
63 #ifndef MAX
64 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
65 #endif
66 
67 #define CTRL(x)		((x) & 0x1f)
68 
69 #ifndef nitems
70 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
71 #endif
72 
73 struct tog_cmd {
74 	const char *name;
75 	const struct got_error *(*cmd_main)(int, char *[]);
76 	void (*cmd_usage)(void);
77 };
78 
79 __dead static void	usage(int, int);
80 __dead static void	usage_log(void);
81 __dead static void	usage_diff(void);
82 __dead static void	usage_blame(void);
83 __dead static void	usage_tree(void);
84 __dead static void	usage_ref(void);
85 
86 static const struct got_error*	cmd_log(int, char *[]);
87 static const struct got_error*	cmd_diff(int, char *[]);
88 static const struct got_error*	cmd_blame(int, char *[]);
89 static const struct got_error*	cmd_tree(int, char *[]);
90 static const struct got_error*	cmd_ref(int, char *[]);
91 
92 static const struct tog_cmd tog_commands[] = {
93 	{ "log",	cmd_log,	usage_log },
94 	{ "diff",	cmd_diff,	usage_diff },
95 	{ "blame",	cmd_blame,	usage_blame },
96 	{ "tree",	cmd_tree,	usage_tree },
97 	{ "ref",	cmd_ref,	usage_ref },
98 };
99 
100 enum tog_view_type {
101 	TOG_VIEW_DIFF,
102 	TOG_VIEW_LOG,
103 	TOG_VIEW_BLAME,
104 	TOG_VIEW_TREE,
105 	TOG_VIEW_REF,
106 };
107 
108 #define TOG_EOF_STRING	"(END)"
109 
110 struct commit_queue_entry {
111 	TAILQ_ENTRY(commit_queue_entry) entry;
112 	struct got_object_id *id;
113 	struct got_commit_object *commit;
114 	int idx;
115 };
116 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
117 struct commit_queue {
118 	int ncommits;
119 	struct commit_queue_head head;
120 };
121 
122 struct tog_color {
123 	STAILQ_ENTRY(tog_color) entry;
124 	regex_t regex;
125 	short colorpair;
126 };
127 STAILQ_HEAD(tog_colors, tog_color);
128 
129 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
130 static struct got_reflist_object_id_map *tog_refs_idmap;
131 
132 static const struct got_error *
133 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
134     struct got_reference* re2)
135 {
136 	const char *name1 = got_ref_get_name(re1);
137 	const char *name2 = got_ref_get_name(re2);
138 	int isbackup1, isbackup2;
139 
140 	/* Sort backup refs towards the bottom of the list. */
141 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
142 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
143 	if (!isbackup1 && isbackup2) {
144 		*cmp = -1;
145 		return NULL;
146 	} else if (isbackup1 && !isbackup2) {
147 		*cmp = 1;
148 		return NULL;
149 	}
150 
151 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
152 	return NULL;
153 }
154 
155 static const struct got_error *
156 tog_load_refs(struct got_repository *repo, int sort_by_date)
157 {
158 	const struct got_error *err;
159 
160 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
161 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
162 	    repo);
163 	if (err)
164 		return err;
165 
166 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
167 	    repo);
168 }
169 
170 static void
171 tog_free_refs(void)
172 {
173 	if (tog_refs_idmap) {
174 		got_reflist_object_id_map_free(tog_refs_idmap);
175 		tog_refs_idmap = NULL;
176 	}
177 	got_ref_list_free(&tog_refs);
178 }
179 
180 static const struct got_error *
181 add_color(struct tog_colors *colors, const char *pattern,
182     int idx, short color)
183 {
184 	const struct got_error *err = NULL;
185 	struct tog_color *tc;
186 	int regerr = 0;
187 
188 	if (idx < 1 || idx > COLOR_PAIRS - 1)
189 		return NULL;
190 
191 	init_pair(idx, color, -1);
192 
193 	tc = calloc(1, sizeof(*tc));
194 	if (tc == NULL)
195 		return got_error_from_errno("calloc");
196 	regerr = regcomp(&tc->regex, pattern,
197 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
198 	if (regerr) {
199 		static char regerr_msg[512];
200 		static char err_msg[512];
201 		regerror(regerr, &tc->regex, regerr_msg,
202 		    sizeof(regerr_msg));
203 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
204 		    regerr_msg);
205 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
206 		free(tc);
207 		return err;
208 	}
209 	tc->colorpair = idx;
210 	STAILQ_INSERT_HEAD(colors, tc, entry);
211 	return NULL;
212 }
213 
214 static void
215 free_colors(struct tog_colors *colors)
216 {
217 	struct tog_color *tc;
218 
219 	while (!STAILQ_EMPTY(colors)) {
220 		tc = STAILQ_FIRST(colors);
221 		STAILQ_REMOVE_HEAD(colors, entry);
222 		regfree(&tc->regex);
223 		free(tc);
224 	}
225 }
226 
227 struct tog_color *
228 get_color(struct tog_colors *colors, int colorpair)
229 {
230 	struct tog_color *tc = NULL;
231 
232 	STAILQ_FOREACH(tc, colors, entry) {
233 		if (tc->colorpair == colorpair)
234 			return tc;
235 	}
236 
237 	return NULL;
238 }
239 
240 static int
241 default_color_value(const char *envvar)
242 {
243 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
244 		return COLOR_MAGENTA;
245 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
246 		return COLOR_CYAN;
247 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
248 		return COLOR_YELLOW;
249 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
250 		return COLOR_GREEN;
251 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
252 		return COLOR_MAGENTA;
253 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
254 		return COLOR_MAGENTA;
255 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
256 		return COLOR_CYAN;
257 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
258 		return COLOR_GREEN;
259 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
260 		return COLOR_GREEN;
261 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
262 		return COLOR_CYAN;
263 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
264 		return COLOR_YELLOW;
265 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
266 		return COLOR_GREEN;
267 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
268 		return COLOR_MAGENTA;
269 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
270 		return COLOR_YELLOW;
271 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
272 		return COLOR_CYAN;
273 
274 	return -1;
275 }
276 
277 static int
278 get_color_value(const char *envvar)
279 {
280 	const char *val = getenv(envvar);
281 
282 	if (val == NULL)
283 		return default_color_value(envvar);
284 
285 	if (strcasecmp(val, "black") == 0)
286 		return COLOR_BLACK;
287 	if (strcasecmp(val, "red") == 0)
288 		return COLOR_RED;
289 	if (strcasecmp(val, "green") == 0)
290 		return COLOR_GREEN;
291 	if (strcasecmp(val, "yellow") == 0)
292 		return COLOR_YELLOW;
293 	if (strcasecmp(val, "blue") == 0)
294 		return COLOR_BLUE;
295 	if (strcasecmp(val, "magenta") == 0)
296 		return COLOR_MAGENTA;
297 	if (strcasecmp(val, "cyan") == 0)
298 		return COLOR_CYAN;
299 	if (strcasecmp(val, "white") == 0)
300 		return COLOR_WHITE;
301 	if (strcasecmp(val, "default") == 0)
302 		return -1;
303 
304 	return default_color_value(envvar);
305 }
306 
307 
308 struct tog_diff_view_state {
309 	struct got_object_id *id1, *id2;
310 	const char *label1, *label2;
311 	FILE *f, *f1, *f2;
312 	int first_displayed_line;
313 	int last_displayed_line;
314 	int eof;
315 	int diff_context;
316 	int ignore_whitespace;
317 	int force_text_diff;
318 	struct got_repository *repo;
319 	struct tog_colors colors;
320 	size_t nlines;
321 	off_t *line_offsets;
322 	int matched_line;
323 	int selected_line;
324 
325 	/* passed from log view; may be NULL */
326 	struct tog_view *log_view;
327 };
328 
329 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
330 
331 struct tog_log_thread_args {
332 	pthread_cond_t need_commits;
333 	pthread_cond_t commit_loaded;
334 	int commits_needed;
335 	int load_all;
336 	struct got_commit_graph *graph;
337 	struct commit_queue *commits;
338 	const char *in_repo_path;
339 	struct got_object_id *start_id;
340 	struct got_repository *repo;
341 	int *pack_fds;
342 	int log_complete;
343 	sig_atomic_t *quit;
344 	struct commit_queue_entry **first_displayed_entry;
345 	struct commit_queue_entry **selected_entry;
346 	int *searching;
347 	int *search_next_done;
348 	regex_t *regex;
349 };
350 
351 struct tog_log_view_state {
352 	struct commit_queue commits;
353 	struct commit_queue_entry *first_displayed_entry;
354 	struct commit_queue_entry *last_displayed_entry;
355 	struct commit_queue_entry *selected_entry;
356 	int selected;
357 	char *in_repo_path;
358 	char *head_ref_name;
359 	int log_branches;
360 	struct got_repository *repo;
361 	struct got_object_id *start_id;
362 	sig_atomic_t quit;
363 	pthread_t thread;
364 	struct tog_log_thread_args thread_args;
365 	struct commit_queue_entry *matched_entry;
366 	struct commit_queue_entry *search_entry;
367 	struct tog_colors colors;
368 };
369 
370 #define TOG_COLOR_DIFF_MINUS		1
371 #define TOG_COLOR_DIFF_PLUS		2
372 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
373 #define TOG_COLOR_DIFF_META		4
374 #define TOG_COLOR_TREE_SUBMODULE	5
375 #define TOG_COLOR_TREE_SYMLINK		6
376 #define TOG_COLOR_TREE_DIRECTORY	7
377 #define TOG_COLOR_TREE_EXECUTABLE	8
378 #define TOG_COLOR_COMMIT		9
379 #define TOG_COLOR_AUTHOR		10
380 #define TOG_COLOR_DATE			11
381 #define TOG_COLOR_REFS_HEADS		12
382 #define TOG_COLOR_REFS_TAGS		13
383 #define TOG_COLOR_REFS_REMOTES		14
384 #define TOG_COLOR_REFS_BACKUP		15
385 
386 struct tog_blame_cb_args {
387 	struct tog_blame_line *lines; /* one per line */
388 	int nlines;
389 
390 	struct tog_view *view;
391 	struct got_object_id *commit_id;
392 	int *quit;
393 };
394 
395 struct tog_blame_thread_args {
396 	const char *path;
397 	struct got_repository *repo;
398 	struct tog_blame_cb_args *cb_args;
399 	int *complete;
400 	got_cancel_cb cancel_cb;
401 	void *cancel_arg;
402 };
403 
404 struct tog_blame {
405 	FILE *f;
406 	off_t filesize;
407 	struct tog_blame_line *lines;
408 	int nlines;
409 	off_t *line_offsets;
410 	pthread_t thread;
411 	struct tog_blame_thread_args thread_args;
412 	struct tog_blame_cb_args cb_args;
413 	const char *path;
414 	int *pack_fds;
415 };
416 
417 struct tog_blame_view_state {
418 	int first_displayed_line;
419 	int last_displayed_line;
420 	int selected_line;
421 	int blame_complete;
422 	int eof;
423 	int done;
424 	struct got_object_id_queue blamed_commits;
425 	struct got_object_qid *blamed_commit;
426 	char *path;
427 	struct got_repository *repo;
428 	struct got_object_id *commit_id;
429 	struct tog_blame blame;
430 	int matched_line;
431 	struct tog_colors colors;
432 };
433 
434 struct tog_parent_tree {
435 	TAILQ_ENTRY(tog_parent_tree) entry;
436 	struct got_tree_object *tree;
437 	struct got_tree_entry *first_displayed_entry;
438 	struct got_tree_entry *selected_entry;
439 	int selected;
440 };
441 
442 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
443 
444 struct tog_tree_view_state {
445 	char *tree_label;
446 	struct got_object_id *commit_id;/* commit which this tree belongs to */
447 	struct got_tree_object *root;	/* the commit's root tree entry */
448 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
449 	struct got_tree_entry *first_displayed_entry;
450 	struct got_tree_entry *last_displayed_entry;
451 	struct got_tree_entry *selected_entry;
452 	int ndisplayed, selected, show_ids;
453 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
454 	char *head_ref_name;
455 	struct got_repository *repo;
456 	struct got_tree_entry *matched_entry;
457 	struct tog_colors colors;
458 };
459 
460 struct tog_reflist_entry {
461 	TAILQ_ENTRY(tog_reflist_entry) entry;
462 	struct got_reference *ref;
463 	int idx;
464 };
465 
466 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
467 
468 struct tog_ref_view_state {
469 	struct tog_reflist_head refs;
470 	struct tog_reflist_entry *first_displayed_entry;
471 	struct tog_reflist_entry *last_displayed_entry;
472 	struct tog_reflist_entry *selected_entry;
473 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
474 	struct got_repository *repo;
475 	struct tog_reflist_entry *matched_entry;
476 	struct tog_colors colors;
477 };
478 
479 /*
480  * We implement two types of views: parent views and child views.
481  *
482  * The 'Tab' key switches focus between a parent view and its child view.
483  * Child views are shown side-by-side to their parent view, provided
484  * there is enough screen estate.
485  *
486  * When a new view is opened from within a parent view, this new view
487  * becomes a child view of the parent view, replacing any existing child.
488  *
489  * When a new view is opened from within a child view, this new view
490  * becomes a parent view which will obscure the views below until the
491  * user quits the new parent view by typing 'q'.
492  *
493  * This list of views contains parent views only.
494  * Child views are only pointed to by their parent view.
495  */
496 TAILQ_HEAD(tog_view_list_head, tog_view);
497 
498 struct tog_view {
499 	TAILQ_ENTRY(tog_view) entry;
500 	WINDOW *window;
501 	PANEL *panel;
502 	int nlines, ncols, begin_y, begin_x;
503 	int maxx, x; /* max column and current start column */
504 	int lines, cols; /* copies of LINES and COLS */
505 	int focussed; /* Only set on one parent or child view at a time. */
506 	int dying;
507 	struct tog_view *parent;
508 	struct tog_view *child;
509 
510 	/*
511 	 * This flag is initially set on parent views when a new child view
512 	 * is created. It gets toggled when the 'Tab' key switches focus
513 	 * between parent and child.
514 	 * The flag indicates whether focus should be passed on to our child
515 	 * view if this parent view gets picked for focus after another parent
516 	 * view was closed. This prevents child views from losing focus in such
517 	 * situations.
518 	 */
519 	int focus_child;
520 
521 	/* type-specific state */
522 	enum tog_view_type type;
523 	union {
524 		struct tog_diff_view_state diff;
525 		struct tog_log_view_state log;
526 		struct tog_blame_view_state blame;
527 		struct tog_tree_view_state tree;
528 		struct tog_ref_view_state ref;
529 	} state;
530 
531 	const struct got_error *(*show)(struct tog_view *);
532 	const struct got_error *(*input)(struct tog_view **,
533 	    struct tog_view *, int);
534 	const struct got_error *(*close)(struct tog_view *);
535 
536 	const struct got_error *(*search_start)(struct tog_view *);
537 	const struct got_error *(*search_next)(struct tog_view *);
538 	int search_started;
539 	int searching;
540 #define TOG_SEARCH_FORWARD	1
541 #define TOG_SEARCH_BACKWARD	2
542 	int search_next_done;
543 #define TOG_SEARCH_HAVE_MORE	1
544 #define TOG_SEARCH_NO_MORE	2
545 #define TOG_SEARCH_HAVE_NONE	3
546 	regex_t regex;
547 	regmatch_t regmatch;
548 };
549 
550 static const struct got_error *open_diff_view(struct tog_view *,
551     struct got_object_id *, struct got_object_id *,
552     const char *, const char *, int, int, int, struct tog_view *,
553     struct got_repository *);
554 static const struct got_error *show_diff_view(struct tog_view *);
555 static const struct got_error *input_diff_view(struct tog_view **,
556     struct tog_view *, int);
557 static const struct got_error* close_diff_view(struct tog_view *);
558 static const struct got_error *search_start_diff_view(struct tog_view *);
559 static const struct got_error *search_next_diff_view(struct tog_view *);
560 
561 static const struct got_error *open_log_view(struct tog_view *,
562     struct got_object_id *, struct got_repository *,
563     const char *, const char *, int);
564 static const struct got_error * show_log_view(struct tog_view *);
565 static const struct got_error *input_log_view(struct tog_view **,
566     struct tog_view *, int);
567 static const struct got_error *close_log_view(struct tog_view *);
568 static const struct got_error *search_start_log_view(struct tog_view *);
569 static const struct got_error *search_next_log_view(struct tog_view *);
570 
571 static const struct got_error *open_blame_view(struct tog_view *, char *,
572     struct got_object_id *, struct got_repository *);
573 static const struct got_error *show_blame_view(struct tog_view *);
574 static const struct got_error *input_blame_view(struct tog_view **,
575     struct tog_view *, int);
576 static const struct got_error *close_blame_view(struct tog_view *);
577 static const struct got_error *search_start_blame_view(struct tog_view *);
578 static const struct got_error *search_next_blame_view(struct tog_view *);
579 
580 static const struct got_error *open_tree_view(struct tog_view *,
581     struct got_object_id *, const char *, struct got_repository *);
582 static const struct got_error *show_tree_view(struct tog_view *);
583 static const struct got_error *input_tree_view(struct tog_view **,
584     struct tog_view *, int);
585 static const struct got_error *close_tree_view(struct tog_view *);
586 static const struct got_error *search_start_tree_view(struct tog_view *);
587 static const struct got_error *search_next_tree_view(struct tog_view *);
588 
589 static const struct got_error *open_ref_view(struct tog_view *,
590     struct got_repository *);
591 static const struct got_error *show_ref_view(struct tog_view *);
592 static const struct got_error *input_ref_view(struct tog_view **,
593     struct tog_view *, int);
594 static const struct got_error *close_ref_view(struct tog_view *);
595 static const struct got_error *search_start_ref_view(struct tog_view *);
596 static const struct got_error *search_next_ref_view(struct tog_view *);
597 
598 static volatile sig_atomic_t tog_sigwinch_received;
599 static volatile sig_atomic_t tog_sigpipe_received;
600 static volatile sig_atomic_t tog_sigcont_received;
601 static volatile sig_atomic_t tog_sigint_received;
602 static volatile sig_atomic_t tog_sigterm_received;
603 
604 static void
605 tog_sigwinch(int signo)
606 {
607 	tog_sigwinch_received = 1;
608 }
609 
610 static void
611 tog_sigpipe(int signo)
612 {
613 	tog_sigpipe_received = 1;
614 }
615 
616 static void
617 tog_sigcont(int signo)
618 {
619 	tog_sigcont_received = 1;
620 }
621 
622 static void
623 tog_sigint(int signo)
624 {
625 	tog_sigint_received = 1;
626 }
627 
628 static void
629 tog_sigterm(int signo)
630 {
631 	tog_sigterm_received = 1;
632 }
633 
634 static int
635 tog_fatal_signal_received(void)
636 {
637 	return (tog_sigpipe_received ||
638 	    tog_sigint_received || tog_sigint_received);
639 }
640 
641 
642 static const struct got_error *
643 view_close(struct tog_view *view)
644 {
645 	const struct got_error *err = NULL;
646 
647 	if (view->child) {
648 		view_close(view->child);
649 		view->child = NULL;
650 	}
651 	if (view->close)
652 		err = view->close(view);
653 	if (view->panel)
654 		del_panel(view->panel);
655 	if (view->window)
656 		delwin(view->window);
657 	free(view);
658 	return err;
659 }
660 
661 static struct tog_view *
662 view_open(int nlines, int ncols, int begin_y, int begin_x,
663     enum tog_view_type type)
664 {
665 	struct tog_view *view = calloc(1, sizeof(*view));
666 
667 	if (view == NULL)
668 		return NULL;
669 
670 	view->type = type;
671 	view->lines = LINES;
672 	view->cols = COLS;
673 	view->nlines = nlines ? nlines : LINES - begin_y;
674 	view->ncols = ncols ? ncols : COLS - begin_x;
675 	view->begin_y = begin_y;
676 	view->begin_x = begin_x;
677 	view->window = newwin(nlines, ncols, begin_y, begin_x);
678 	if (view->window == NULL) {
679 		view_close(view);
680 		return NULL;
681 	}
682 	view->panel = new_panel(view->window);
683 	if (view->panel == NULL ||
684 	    set_panel_userptr(view->panel, view) != OK) {
685 		view_close(view);
686 		return NULL;
687 	}
688 
689 	keypad(view->window, TRUE);
690 	return view;
691 }
692 
693 static int
694 view_split_begin_x(int begin_x)
695 {
696 	if (begin_x > 0 || COLS < 120)
697 		return 0;
698 	return (COLS - MAX(COLS / 2, 80));
699 }
700 
701 static const struct got_error *view_resize(struct tog_view *);
702 
703 static const struct got_error *
704 view_splitscreen(struct tog_view *view)
705 {
706 	const struct got_error *err = NULL;
707 
708 	view->begin_y = 0;
709 	view->begin_x = view_split_begin_x(0);
710 	view->nlines = LINES;
711 	view->ncols = COLS - view->begin_x;
712 	view->lines = LINES;
713 	view->cols = COLS;
714 	err = view_resize(view);
715 	if (err)
716 		return err;
717 
718 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
719 		return got_error_from_errno("mvwin");
720 
721 	return NULL;
722 }
723 
724 static const struct got_error *
725 view_fullscreen(struct tog_view *view)
726 {
727 	const struct got_error *err = NULL;
728 
729 	view->begin_x = 0;
730 	view->begin_y = 0;
731 	view->nlines = LINES;
732 	view->ncols = COLS;
733 	view->lines = LINES;
734 	view->cols = COLS;
735 	err = view_resize(view);
736 	if (err)
737 		return err;
738 
739 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
740 		return got_error_from_errno("mvwin");
741 
742 	return NULL;
743 }
744 
745 static int
746 view_is_parent_view(struct tog_view *view)
747 {
748 	return view->parent == NULL;
749 }
750 
751 static const struct got_error *
752 view_resize(struct tog_view *view)
753 {
754 	int nlines, ncols;
755 
756 	if (view->lines > LINES)
757 		nlines = view->nlines - (view->lines - LINES);
758 	else
759 		nlines = view->nlines + (LINES - view->lines);
760 
761 	if (view->cols > COLS)
762 		ncols = view->ncols - (view->cols - COLS);
763 	else
764 		ncols = view->ncols + (COLS - view->cols);
765 
766 	if (view->child) {
767 		view->child->begin_x = view_split_begin_x(view->begin_x);
768 		if (view->child->begin_x == 0) {
769 			ncols = COLS;
770 
771 			view_fullscreen(view->child);
772 			if (view->child->focussed)
773 				show_panel(view->child->panel);
774 			else
775 				show_panel(view->panel);
776 		} else {
777 			ncols = view->child->begin_x;
778 
779 			view_splitscreen(view->child);
780 			show_panel(view->child->panel);
781 		}
782 	} else if (view->parent == NULL)
783 		ncols = COLS;
784 
785 	if (wresize(view->window, nlines, ncols) == ERR)
786 		return got_error_from_errno("wresize");
787 	if (replace_panel(view->panel, view->window) == ERR)
788 		return got_error_from_errno("replace_panel");
789 	wclear(view->window);
790 
791 	view->nlines = nlines;
792 	view->ncols = ncols;
793 	view->lines = LINES;
794 	view->cols = COLS;
795 
796 	return NULL;
797 }
798 
799 static const struct got_error *
800 view_close_child(struct tog_view *view)
801 {
802 	const struct got_error *err = NULL;
803 
804 	if (view->child == NULL)
805 		return NULL;
806 
807 	err = view_close(view->child);
808 	view->child = NULL;
809 	return err;
810 }
811 
812 static const struct got_error *
813 view_set_child(struct tog_view *view, struct tog_view *child)
814 {
815 	view->child = child;
816 	child->parent = view;
817 
818 	return view_resize(view);
819 }
820 
821 static int
822 view_is_splitscreen(struct tog_view *view)
823 {
824 	return view->begin_x > 0;
825 }
826 
827 static void
828 tog_resizeterm(void)
829 {
830 	int cols, lines;
831 	struct winsize size;
832 
833 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
834 		cols = 80;     /* Default */
835 		lines = 24;
836 	} else {
837 		cols = size.ws_col;
838 		lines = size.ws_row;
839 	}
840 	resize_term(lines, cols);
841 }
842 
843 static const struct got_error *
844 view_search_start(struct tog_view *view)
845 {
846 	const struct got_error *err = NULL;
847 	char pattern[1024];
848 	int ret;
849 
850 	if (view->search_started) {
851 		regfree(&view->regex);
852 		view->searching = 0;
853 		memset(&view->regmatch, 0, sizeof(view->regmatch));
854 	}
855 	view->search_started = 0;
856 
857 	if (view->nlines < 1)
858 		return NULL;
859 
860 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
861 	wclrtoeol(view->window);
862 
863 	nocbreak();
864 	echo();
865 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
866 	cbreak();
867 	noecho();
868 	if (ret == ERR)
869 		return NULL;
870 
871 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
872 		err = view->search_start(view);
873 		if (err) {
874 			regfree(&view->regex);
875 			return err;
876 		}
877 		view->search_started = 1;
878 		view->searching = TOG_SEARCH_FORWARD;
879 		view->search_next_done = 0;
880 		view->search_next(view);
881 	}
882 
883 	return NULL;
884 }
885 
886 static const struct got_error *
887 view_input(struct tog_view **new, int *done, struct tog_view *view,
888     struct tog_view_list_head *views)
889 {
890 	const struct got_error *err = NULL;
891 	struct tog_view *v;
892 	int ch, errcode;
893 
894 	*new = NULL;
895 
896 	/* Clear "no matches" indicator. */
897 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
898 	    view->search_next_done == TOG_SEARCH_HAVE_NONE)
899 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
900 
901 	if (view->searching && !view->search_next_done) {
902 		errcode = pthread_mutex_unlock(&tog_mutex);
903 		if (errcode)
904 			return got_error_set_errno(errcode,
905 			    "pthread_mutex_unlock");
906 		sched_yield();
907 		errcode = pthread_mutex_lock(&tog_mutex);
908 		if (errcode)
909 			return got_error_set_errno(errcode,
910 			    "pthread_mutex_lock");
911 		view->search_next(view);
912 		return NULL;
913 	}
914 
915 	nodelay(stdscr, FALSE);
916 	/* Allow threads to make progress while we are waiting for input. */
917 	errcode = pthread_mutex_unlock(&tog_mutex);
918 	if (errcode)
919 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
920 	ch = wgetch(view->window);
921 	errcode = pthread_mutex_lock(&tog_mutex);
922 	if (errcode)
923 		return got_error_set_errno(errcode, "pthread_mutex_lock");
924 	nodelay(stdscr, TRUE);
925 
926 	if (tog_sigwinch_received || tog_sigcont_received) {
927 		tog_resizeterm();
928 		tog_sigwinch_received = 0;
929 		tog_sigcont_received = 0;
930 		TAILQ_FOREACH(v, views, entry) {
931 			err = view_resize(v);
932 			if (err)
933 				return err;
934 			err = v->input(new, v, KEY_RESIZE);
935 			if (err)
936 				return err;
937 			if (v->child) {
938 				err = view_resize(v->child);
939 				if (err)
940 					return err;
941 				err = v->child->input(new, v->child,
942 				    KEY_RESIZE);
943 				if (err)
944 					return err;
945 			}
946 		}
947 	}
948 
949 	switch (ch) {
950 	case '\t':
951 		if (view->child) {
952 			view->focussed = 0;
953 			view->child->focussed = 1;
954 			view->focus_child = 1;
955 		} else if (view->parent) {
956 			view->focussed = 0;
957 			view->parent->focussed = 1;
958 			view->parent->focus_child = 0;
959 		}
960 		break;
961 	case 'q':
962 		err = view->input(new, view, ch);
963 		view->dying = 1;
964 		break;
965 	case 'Q':
966 		*done = 1;
967 		break;
968 	case 'f':
969 		if (view_is_parent_view(view)) {
970 			if (view->child == NULL)
971 				break;
972 			if (view_is_splitscreen(view->child)) {
973 				view->focussed = 0;
974 				view->child->focussed = 1;
975 				err = view_fullscreen(view->child);
976 			} else
977 				err = view_splitscreen(view->child);
978 			if (err)
979 				break;
980 			err = view->child->input(new, view->child,
981 			    KEY_RESIZE);
982 		} else {
983 			if (view_is_splitscreen(view)) {
984 				view->parent->focussed = 0;
985 				view->focussed = 1;
986 				err = view_fullscreen(view);
987 			} else {
988 				err = view_splitscreen(view);
989 			}
990 			if (err)
991 				break;
992 			err = view->input(new, view, KEY_RESIZE);
993 		}
994 		break;
995 	case KEY_RESIZE:
996 		break;
997 	case '/':
998 		if (view->search_start)
999 			view_search_start(view);
1000 		else
1001 			err = view->input(new, view, ch);
1002 		break;
1003 	case 'N':
1004 	case 'n':
1005 		if (view->search_started && view->search_next) {
1006 			view->searching = (ch == 'n' ?
1007 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1008 			view->search_next_done = 0;
1009 			view->search_next(view);
1010 		} else
1011 			err = view->input(new, view, ch);
1012 		break;
1013 	default:
1014 		err = view->input(new, view, ch);
1015 		break;
1016 	}
1017 
1018 	return err;
1019 }
1020 
1021 void
1022 view_vborder(struct tog_view *view)
1023 {
1024 	PANEL *panel;
1025 	const struct tog_view *view_above;
1026 
1027 	if (view->parent)
1028 		return view_vborder(view->parent);
1029 
1030 	panel = panel_above(view->panel);
1031 	if (panel == NULL)
1032 		return;
1033 
1034 	view_above = panel_userptr(panel);
1035 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1036 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
1037 }
1038 
1039 int
1040 view_needs_focus_indication(struct tog_view *view)
1041 {
1042 	if (view_is_parent_view(view)) {
1043 		if (view->child == NULL || view->child->focussed)
1044 			return 0;
1045 		if (!view_is_splitscreen(view->child))
1046 			return 0;
1047 	} else if (!view_is_splitscreen(view))
1048 		return 0;
1049 
1050 	return view->focussed;
1051 }
1052 
1053 static const struct got_error *
1054 view_loop(struct tog_view *view)
1055 {
1056 	const struct got_error *err = NULL;
1057 	struct tog_view_list_head views;
1058 	struct tog_view *new_view;
1059 	int fast_refresh = 10;
1060 	int done = 0, errcode;
1061 
1062 	errcode = pthread_mutex_lock(&tog_mutex);
1063 	if (errcode)
1064 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1065 
1066 	TAILQ_INIT(&views);
1067 	TAILQ_INSERT_HEAD(&views, view, entry);
1068 
1069 	view->focussed = 1;
1070 	err = view->show(view);
1071 	if (err)
1072 		return err;
1073 	update_panels();
1074 	doupdate();
1075 	while (!TAILQ_EMPTY(&views) && !done && !tog_fatal_signal_received()) {
1076 		/* Refresh fast during initialization, then become slower. */
1077 		if (fast_refresh && fast_refresh-- == 0)
1078 			halfdelay(10); /* switch to once per second */
1079 
1080 		err = view_input(&new_view, &done, view, &views);
1081 		if (err)
1082 			break;
1083 		if (view->dying) {
1084 			struct tog_view *v, *prev = NULL;
1085 
1086 			if (view_is_parent_view(view))
1087 				prev = TAILQ_PREV(view, tog_view_list_head,
1088 				    entry);
1089 			else if (view->parent)
1090 				prev = view->parent;
1091 
1092 			if (view->parent) {
1093 				view->parent->child = NULL;
1094 				view->parent->focus_child = 0;
1095 
1096 				err = view_resize(view->parent);
1097 				if (err)
1098 					break;
1099 			} else
1100 				TAILQ_REMOVE(&views, view, entry);
1101 
1102 			err = view_close(view);
1103 			if (err)
1104 				goto done;
1105 
1106 			view = NULL;
1107 			TAILQ_FOREACH(v, &views, entry) {
1108 				if (v->focussed)
1109 					break;
1110 			}
1111 			if (view == NULL && new_view == NULL) {
1112 				/* No view has focus. Try to pick one. */
1113 				if (prev)
1114 					view = prev;
1115 				else if (!TAILQ_EMPTY(&views)) {
1116 					view = TAILQ_LAST(&views,
1117 					    tog_view_list_head);
1118 				}
1119 				if (view) {
1120 					if (view->focus_child) {
1121 						view->child->focussed = 1;
1122 						view = view->child;
1123 					} else
1124 						view->focussed = 1;
1125 				}
1126 			}
1127 		}
1128 		if (new_view) {
1129 			struct tog_view *v, *t;
1130 			/* Only allow one parent view per type. */
1131 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1132 				if (v->type != new_view->type)
1133 					continue;
1134 				TAILQ_REMOVE(&views, v, entry);
1135 				err = view_close(v);
1136 				if (err)
1137 					goto done;
1138 				break;
1139 			}
1140 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1141 			view = new_view;
1142 		}
1143 		if (view) {
1144 			if (view_is_parent_view(view)) {
1145 				if (view->child && view->child->focussed)
1146 					view = view->child;
1147 			} else {
1148 				if (view->parent && view->parent->focussed)
1149 					view = view->parent;
1150 			}
1151 			show_panel(view->panel);
1152 			if (view->child && view_is_splitscreen(view->child))
1153 				show_panel(view->child->panel);
1154 			if (view->parent && view_is_splitscreen(view)) {
1155 				err = view->parent->show(view->parent);
1156 				if (err)
1157 					goto done;
1158 			}
1159 			err = view->show(view);
1160 			if (err)
1161 				goto done;
1162 			if (view->child) {
1163 				err = view->child->show(view->child);
1164 				if (err)
1165 					goto done;
1166 			}
1167 			update_panels();
1168 			doupdate();
1169 		}
1170 	}
1171 done:
1172 	while (!TAILQ_EMPTY(&views)) {
1173 		view = TAILQ_FIRST(&views);
1174 		TAILQ_REMOVE(&views, view, entry);
1175 		view_close(view);
1176 	}
1177 
1178 	errcode = pthread_mutex_unlock(&tog_mutex);
1179 	if (errcode && err == NULL)
1180 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1181 
1182 	return err;
1183 }
1184 
1185 __dead static void
1186 usage_log(void)
1187 {
1188 	endwin();
1189 	fprintf(stderr,
1190 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1191 	    getprogname());
1192 	exit(1);
1193 }
1194 
1195 /* Create newly allocated wide-character string equivalent to a byte string. */
1196 static const struct got_error *
1197 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1198 {
1199 	char *vis = NULL;
1200 	const struct got_error *err = NULL;
1201 
1202 	*ws = NULL;
1203 	*wlen = mbstowcs(NULL, s, 0);
1204 	if (*wlen == (size_t)-1) {
1205 		int vislen;
1206 		if (errno != EILSEQ)
1207 			return got_error_from_errno("mbstowcs");
1208 
1209 		/* byte string invalid in current encoding; try to "fix" it */
1210 		err = got_mbsavis(&vis, &vislen, s);
1211 		if (err)
1212 			return err;
1213 		*wlen = mbstowcs(NULL, vis, 0);
1214 		if (*wlen == (size_t)-1) {
1215 			err = got_error_from_errno("mbstowcs"); /* give up */
1216 			goto done;
1217 		}
1218 	}
1219 
1220 	*ws = calloc(*wlen + 1, sizeof(**ws));
1221 	if (*ws == NULL) {
1222 		err = got_error_from_errno("calloc");
1223 		goto done;
1224 	}
1225 
1226 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1227 		err = got_error_from_errno("mbstowcs");
1228 done:
1229 	free(vis);
1230 	if (err) {
1231 		free(*ws);
1232 		*ws = NULL;
1233 		*wlen = 0;
1234 	}
1235 	return err;
1236 }
1237 
1238 static const struct got_error *
1239 expand_tab(char **ptr, const char *src)
1240 {
1241 	char	*dst;
1242 	size_t	 len, n, idx = 0, sz = 0;
1243 
1244 	*ptr = NULL;
1245 	n = len = strlen(src);
1246 	dst = malloc(n + 1);
1247 	if (dst == NULL)
1248 		return got_error_from_errno("malloc");
1249 
1250 	while (idx < len && src[idx]) {
1251 		const char c = src[idx];
1252 
1253 		if (c == '\t') {
1254 			size_t nb = TABSIZE - sz % TABSIZE;
1255 			char *p;
1256 
1257 			p = realloc(dst, n + nb);
1258 			if (p == NULL) {
1259 				free(dst);
1260 				return got_error_from_errno("realloc");
1261 
1262 			}
1263 			dst = p;
1264 			n += nb;
1265 			memset(dst + sz, ' ', nb);
1266 			sz += nb;
1267 		} else
1268 			dst[sz++] = src[idx];
1269 		++idx;
1270 	}
1271 
1272 	dst[sz] = '\0';
1273 	*ptr = dst;
1274 	return NULL;
1275 }
1276 
1277 /*
1278  * Advance at most n columns from wline starting at offset off.
1279  * Return the index to the first character after the span operation.
1280  * Return the combined column width of all spanned wide character in
1281  * *rcol.
1282  */
1283 static int
1284 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1285 {
1286 	int width, i, cols = 0;
1287 
1288 	if (n == 0) {
1289 		*rcol = cols;
1290 		return off;
1291 	}
1292 
1293 	for (i = off; wline[i] != L'\0'; ++i) {
1294 		if (wline[i] == L'\t')
1295 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1296 		else
1297 			width = wcwidth(wline[i]);
1298 
1299 		if (width == -1) {
1300 			width = 1;
1301 			wline[i] = L'.';
1302 		}
1303 
1304 		if (cols + width > n)
1305 			break;
1306 		cols += width;
1307 	}
1308 
1309 	*rcol = cols;
1310 	return i;
1311 }
1312 
1313 /*
1314  * Format a line for display, ensuring that it won't overflow a width limit.
1315  * With scrolling, the width returned refers to the scrolled version of the
1316  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1317  */
1318 static const struct got_error *
1319 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1320     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1321 {
1322 	const struct got_error *err = NULL;
1323 	int cols;
1324 	wchar_t *wline = NULL;
1325 	char *exstr = NULL;
1326 	size_t wlen;
1327 	int i, scrollx;
1328 
1329 	*wlinep = NULL;
1330 	*widthp = 0;
1331 
1332 	if (expand) {
1333 		err = expand_tab(&exstr, line);
1334 		if (err)
1335 			return err;
1336 	}
1337 
1338 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1339 	free(exstr);
1340 	if (err)
1341 		return err;
1342 
1343 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1344 
1345 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1346 		wline[wlen - 1] = L'\0';
1347 		wlen--;
1348 	}
1349 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1350 		wline[wlen - 1] = L'\0';
1351 		wlen--;
1352 	}
1353 
1354 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1355 	wline[i] = L'\0';
1356 
1357 	if (widthp)
1358 		*widthp = cols;
1359 	if (scrollxp)
1360 		*scrollxp = scrollx;
1361 	if (err)
1362 		free(wline);
1363 	else
1364 		*wlinep = wline;
1365 	return err;
1366 }
1367 
1368 static const struct got_error*
1369 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1370     struct got_object_id *id, struct got_repository *repo)
1371 {
1372 	static const struct got_error *err = NULL;
1373 	struct got_reflist_entry *re;
1374 	char *s;
1375 	const char *name;
1376 
1377 	*refs_str = NULL;
1378 
1379 	TAILQ_FOREACH(re, refs, entry) {
1380 		struct got_tag_object *tag = NULL;
1381 		struct got_object_id *ref_id;
1382 		int cmp;
1383 
1384 		name = got_ref_get_name(re->ref);
1385 		if (strcmp(name, GOT_REF_HEAD) == 0)
1386 			continue;
1387 		if (strncmp(name, "refs/", 5) == 0)
1388 			name += 5;
1389 		if (strncmp(name, "got/", 4) == 0 &&
1390 		    strncmp(name, "got/backup/", 11) != 0)
1391 			continue;
1392 		if (strncmp(name, "heads/", 6) == 0)
1393 			name += 6;
1394 		if (strncmp(name, "remotes/", 8) == 0) {
1395 			name += 8;
1396 			s = strstr(name, "/" GOT_REF_HEAD);
1397 			if (s != NULL && s[strlen(s)] == '\0')
1398 				continue;
1399 		}
1400 		err = got_ref_resolve(&ref_id, repo, re->ref);
1401 		if (err)
1402 			break;
1403 		if (strncmp(name, "tags/", 5) == 0) {
1404 			err = got_object_open_as_tag(&tag, repo, ref_id);
1405 			if (err) {
1406 				if (err->code != GOT_ERR_OBJ_TYPE) {
1407 					free(ref_id);
1408 					break;
1409 				}
1410 				/* Ref points at something other than a tag. */
1411 				err = NULL;
1412 				tag = NULL;
1413 			}
1414 		}
1415 		cmp = got_object_id_cmp(tag ?
1416 		    got_object_tag_get_object_id(tag) : ref_id, id);
1417 		free(ref_id);
1418 		if (tag)
1419 			got_object_tag_close(tag);
1420 		if (cmp != 0)
1421 			continue;
1422 		s = *refs_str;
1423 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1424 		    s ? ", " : "", name) == -1) {
1425 			err = got_error_from_errno("asprintf");
1426 			free(s);
1427 			*refs_str = NULL;
1428 			break;
1429 		}
1430 		free(s);
1431 	}
1432 
1433 	return err;
1434 }
1435 
1436 static const struct got_error *
1437 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1438     int col_tab_align)
1439 {
1440 	char *smallerthan;
1441 
1442 	smallerthan = strchr(author, '<');
1443 	if (smallerthan && smallerthan[1] != '\0')
1444 		author = smallerthan + 1;
1445 	author[strcspn(author, "@>")] = '\0';
1446 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1447 	    col_tab_align, 0);
1448 }
1449 
1450 static const struct got_error *
1451 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1452     struct got_object_id *id, const size_t date_display_cols,
1453     int author_display_cols)
1454 {
1455 	struct tog_log_view_state *s = &view->state.log;
1456 	const struct got_error *err = NULL;
1457 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1458 	char *logmsg0 = NULL, *logmsg = NULL;
1459 	char *author = NULL;
1460 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1461 	int author_width, logmsg_width;
1462 	char *newline, *line = NULL;
1463 	int col, limit, scrollx;
1464 	const int avail = view->ncols;
1465 	struct tm tm;
1466 	time_t committer_time;
1467 	struct tog_color *tc;
1468 
1469 	committer_time = got_object_commit_get_committer_time(commit);
1470 	if (gmtime_r(&committer_time, &tm) == NULL)
1471 		return got_error_from_errno("gmtime_r");
1472 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1473 		return got_error(GOT_ERR_NO_SPACE);
1474 
1475 	if (avail <= date_display_cols)
1476 		limit = MIN(sizeof(datebuf) - 1, avail);
1477 	else
1478 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1479 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1480 	if (tc)
1481 		wattr_on(view->window,
1482 		    COLOR_PAIR(tc->colorpair), NULL);
1483 	waddnstr(view->window, datebuf, limit);
1484 	if (tc)
1485 		wattr_off(view->window,
1486 		    COLOR_PAIR(tc->colorpair), NULL);
1487 	col = limit;
1488 	if (col > avail)
1489 		goto done;
1490 
1491 	if (avail >= 120) {
1492 		char *id_str;
1493 		err = got_object_id_str(&id_str, id);
1494 		if (err)
1495 			goto done;
1496 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1497 		if (tc)
1498 			wattr_on(view->window,
1499 			    COLOR_PAIR(tc->colorpair), NULL);
1500 		wprintw(view->window, "%.8s ", id_str);
1501 		if (tc)
1502 			wattr_off(view->window,
1503 			    COLOR_PAIR(tc->colorpair), NULL);
1504 		free(id_str);
1505 		col += 9;
1506 		if (col > avail)
1507 			goto done;
1508 	}
1509 
1510 	author = strdup(got_object_commit_get_author(commit));
1511 	if (author == NULL) {
1512 		err = got_error_from_errno("strdup");
1513 		goto done;
1514 	}
1515 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1516 	if (err)
1517 		goto done;
1518 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1519 	if (tc)
1520 		wattr_on(view->window,
1521 		    COLOR_PAIR(tc->colorpair), NULL);
1522 	waddwstr(view->window, wauthor);
1523 	if (tc)
1524 		wattr_off(view->window,
1525 		    COLOR_PAIR(tc->colorpair), NULL);
1526 	col += author_width;
1527 	while (col < avail && author_width < author_display_cols + 2) {
1528 		waddch(view->window, ' ');
1529 		col++;
1530 		author_width++;
1531 	}
1532 	if (col > avail)
1533 		goto done;
1534 
1535 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1536 	if (err)
1537 		goto done;
1538 	logmsg = logmsg0;
1539 	while (*logmsg == '\n')
1540 		logmsg++;
1541 	newline = strchr(logmsg, '\n');
1542 	if (newline)
1543 		*newline = '\0';
1544 	limit = avail - col;
1545 	if (view->child && limit > 0)
1546 		limit--;	/* for the border */
1547 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
1548 	    limit, col, 1);
1549 	if (err)
1550 		goto done;
1551 	waddwstr(view->window, &wlogmsg[scrollx]);
1552 	col += MAX(logmsg_width, 0);
1553 	while (col < avail) {
1554 		waddch(view->window, ' ');
1555 		col++;
1556 	}
1557 done:
1558 	free(logmsg0);
1559 	free(wlogmsg);
1560 	free(author);
1561 	free(wauthor);
1562 	free(line);
1563 	return err;
1564 }
1565 
1566 static struct commit_queue_entry *
1567 alloc_commit_queue_entry(struct got_commit_object *commit,
1568     struct got_object_id *id)
1569 {
1570 	struct commit_queue_entry *entry;
1571 
1572 	entry = calloc(1, sizeof(*entry));
1573 	if (entry == NULL)
1574 		return NULL;
1575 
1576 	entry->id = id;
1577 	entry->commit = commit;
1578 	return entry;
1579 }
1580 
1581 static void
1582 pop_commit(struct commit_queue *commits)
1583 {
1584 	struct commit_queue_entry *entry;
1585 
1586 	entry = TAILQ_FIRST(&commits->head);
1587 	TAILQ_REMOVE(&commits->head, entry, entry);
1588 	got_object_commit_close(entry->commit);
1589 	commits->ncommits--;
1590 	/* Don't free entry->id! It is owned by the commit graph. */
1591 	free(entry);
1592 }
1593 
1594 static void
1595 free_commits(struct commit_queue *commits)
1596 {
1597 	while (!TAILQ_EMPTY(&commits->head))
1598 		pop_commit(commits);
1599 }
1600 
1601 static const struct got_error *
1602 match_commit(int *have_match, struct got_object_id *id,
1603     struct got_commit_object *commit, regex_t *regex)
1604 {
1605 	const struct got_error *err = NULL;
1606 	regmatch_t regmatch;
1607 	char *id_str = NULL, *logmsg = NULL;
1608 
1609 	*have_match = 0;
1610 
1611 	err = got_object_id_str(&id_str, id);
1612 	if (err)
1613 		return err;
1614 
1615 	err = got_object_commit_get_logmsg(&logmsg, commit);
1616 	if (err)
1617 		goto done;
1618 
1619 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1620 	    &regmatch, 0) == 0 ||
1621 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1622 	    &regmatch, 0) == 0 ||
1623 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1624 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1625 		*have_match = 1;
1626 done:
1627 	free(id_str);
1628 	free(logmsg);
1629 	return err;
1630 }
1631 
1632 static const struct got_error *
1633 queue_commits(struct tog_log_thread_args *a)
1634 {
1635 	const struct got_error *err = NULL;
1636 
1637 	/*
1638 	 * We keep all commits open throughout the lifetime of the log
1639 	 * view in order to avoid having to re-fetch commits from disk
1640 	 * while updating the display.
1641 	 */
1642 	do {
1643 		struct got_object_id *id;
1644 		struct got_commit_object *commit;
1645 		struct commit_queue_entry *entry;
1646 		int errcode;
1647 
1648 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1649 		    NULL, NULL);
1650 		if (err || id == NULL)
1651 			break;
1652 
1653 		err = got_object_open_as_commit(&commit, a->repo, id);
1654 		if (err)
1655 			break;
1656 		entry = alloc_commit_queue_entry(commit, id);
1657 		if (entry == NULL) {
1658 			err = got_error_from_errno("alloc_commit_queue_entry");
1659 			break;
1660 		}
1661 
1662 		errcode = pthread_mutex_lock(&tog_mutex);
1663 		if (errcode) {
1664 			err = got_error_set_errno(errcode,
1665 			    "pthread_mutex_lock");
1666 			break;
1667 		}
1668 
1669 		entry->idx = a->commits->ncommits;
1670 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1671 		a->commits->ncommits++;
1672 
1673 		if (*a->searching == TOG_SEARCH_FORWARD &&
1674 		    !*a->search_next_done) {
1675 			int have_match;
1676 			err = match_commit(&have_match, id, commit, a->regex);
1677 			if (err)
1678 				break;
1679 			if (have_match)
1680 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1681 		}
1682 
1683 		errcode = pthread_mutex_unlock(&tog_mutex);
1684 		if (errcode && err == NULL)
1685 			err = got_error_set_errno(errcode,
1686 			    "pthread_mutex_unlock");
1687 		if (err)
1688 			break;
1689 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1690 
1691 	return err;
1692 }
1693 
1694 static void
1695 select_commit(struct tog_log_view_state *s)
1696 {
1697 	struct commit_queue_entry *entry;
1698 	int ncommits = 0;
1699 
1700 	entry = s->first_displayed_entry;
1701 	while (entry) {
1702 		if (ncommits == s->selected) {
1703 			s->selected_entry = entry;
1704 			break;
1705 		}
1706 		entry = TAILQ_NEXT(entry, entry);
1707 		ncommits++;
1708 	}
1709 }
1710 
1711 static const struct got_error *
1712 draw_commits(struct tog_view *view)
1713 {
1714 	const struct got_error *err = NULL;
1715 	struct tog_log_view_state *s = &view->state.log;
1716 	struct commit_queue_entry *entry = s->selected_entry;
1717 	const int limit = view->nlines;
1718 	int width;
1719 	int ncommits, author_cols = 4;
1720 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1721 	char *refs_str = NULL;
1722 	wchar_t *wline;
1723 	struct tog_color *tc;
1724 	static const size_t date_display_cols = 12;
1725 
1726 	if (s->selected_entry &&
1727 	    !(view->searching && view->search_next_done == 0)) {
1728 		struct got_reflist_head *refs;
1729 		err = got_object_id_str(&id_str, s->selected_entry->id);
1730 		if (err)
1731 			return err;
1732 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1733 		    s->selected_entry->id);
1734 		if (refs) {
1735 			err = build_refs_str(&refs_str, refs,
1736 			    s->selected_entry->id, s->repo);
1737 			if (err)
1738 				goto done;
1739 		}
1740 	}
1741 
1742 	if (s->thread_args.commits_needed == 0)
1743 		halfdelay(10); /* disable fast refresh */
1744 
1745 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
1746 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1747 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1748 		    (view->searching && !view->search_next_done) ?
1749 		    "searching..." : "loading...") == -1) {
1750 			err = got_error_from_errno("asprintf");
1751 			goto done;
1752 		}
1753 	} else {
1754 		const char *search_str = NULL;
1755 
1756 		if (view->searching) {
1757 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1758 				search_str = "no more matches";
1759 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1760 				search_str = "no matches found";
1761 			else if (!view->search_next_done)
1762 				search_str = "searching...";
1763 		}
1764 
1765 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1766 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1767 		    search_str ? search_str :
1768 		    (refs_str ? refs_str : "")) == -1) {
1769 			err = got_error_from_errno("asprintf");
1770 			goto done;
1771 		}
1772 	}
1773 
1774 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1775 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
1776 		    "........................................",
1777 		    s->in_repo_path, ncommits_str) == -1) {
1778 			err = got_error_from_errno("asprintf");
1779 			header = NULL;
1780 			goto done;
1781 		}
1782 	} else if (asprintf(&header, "commit %s%s",
1783 	    id_str ? id_str : "........................................",
1784 	    ncommits_str) == -1) {
1785 		err = got_error_from_errno("asprintf");
1786 		header = NULL;
1787 		goto done;
1788 	}
1789 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
1790 	if (err)
1791 		goto done;
1792 
1793 	werase(view->window);
1794 
1795 	if (view_needs_focus_indication(view))
1796 		wstandout(view->window);
1797 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1798 	if (tc)
1799 		wattr_on(view->window,
1800 		    COLOR_PAIR(tc->colorpair), NULL);
1801 	waddwstr(view->window, wline);
1802 	if (tc)
1803 		wattr_off(view->window,
1804 		    COLOR_PAIR(tc->colorpair), NULL);
1805 	while (width < view->ncols) {
1806 		waddch(view->window, ' ');
1807 		width++;
1808 	}
1809 	if (view_needs_focus_indication(view))
1810 		wstandend(view->window);
1811 	free(wline);
1812 	if (limit <= 1)
1813 		goto done;
1814 
1815 	/* Grow author column size if necessary, and set view->maxx. */
1816 	entry = s->first_displayed_entry;
1817 	ncommits = 0;
1818 	view->maxx = 0;
1819 	while (entry) {
1820 		char *author, *eol, *msg, *msg0;
1821 		wchar_t *wauthor, *wmsg;
1822 		int width;
1823 		if (ncommits >= limit - 1)
1824 			break;
1825 		author = strdup(got_object_commit_get_author(entry->commit));
1826 		if (author == NULL) {
1827 			err = got_error_from_errno("strdup");
1828 			goto done;
1829 		}
1830 		err = format_author(&wauthor, &width, author, COLS,
1831 		    date_display_cols);
1832 		if (author_cols < width)
1833 			author_cols = width;
1834 		free(wauthor);
1835 		free(author);
1836 		err = got_object_commit_get_logmsg(&msg0, entry->commit);
1837 		if (err)
1838 			goto done;
1839 		msg = msg0;
1840 		while (*msg == '\n')
1841 			++msg;
1842 		if ((eol = strchr(msg, '\n')))
1843 			*eol = '\0';
1844 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
1845 		    date_display_cols + author_cols, 0);
1846 		if (err)
1847 			goto done;
1848 		view->maxx = MAX(view->maxx, width);
1849 		free(msg0);
1850 		free(wmsg);
1851 		ncommits++;
1852 		entry = TAILQ_NEXT(entry, entry);
1853 	}
1854 
1855 	entry = s->first_displayed_entry;
1856 	s->last_displayed_entry = s->first_displayed_entry;
1857 	ncommits = 0;
1858 	while (entry) {
1859 		if (ncommits >= limit - 1)
1860 			break;
1861 		if (ncommits == s->selected)
1862 			wstandout(view->window);
1863 		err = draw_commit(view, entry->commit, entry->id,
1864 		    date_display_cols, author_cols);
1865 		if (ncommits == s->selected)
1866 			wstandend(view->window);
1867 		if (err)
1868 			goto done;
1869 		ncommits++;
1870 		s->last_displayed_entry = entry;
1871 		entry = TAILQ_NEXT(entry, entry);
1872 	}
1873 
1874 	view_vborder(view);
1875 done:
1876 	free(id_str);
1877 	free(refs_str);
1878 	free(ncommits_str);
1879 	free(header);
1880 	return err;
1881 }
1882 
1883 static void
1884 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1885 {
1886 	struct commit_queue_entry *entry;
1887 	int nscrolled = 0;
1888 
1889 	entry = TAILQ_FIRST(&s->commits.head);
1890 	if (s->first_displayed_entry == entry)
1891 		return;
1892 
1893 	entry = s->first_displayed_entry;
1894 	while (entry && nscrolled < maxscroll) {
1895 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1896 		if (entry) {
1897 			s->first_displayed_entry = entry;
1898 			nscrolled++;
1899 		}
1900 	}
1901 }
1902 
1903 static const struct got_error *
1904 trigger_log_thread(struct tog_view *view, int wait)
1905 {
1906 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1907 	int errcode;
1908 
1909 	halfdelay(1); /* fast refresh while loading commits */
1910 
1911 	while (ta->commits_needed > 0 || ta->load_all) {
1912 		if (ta->log_complete)
1913 			break;
1914 
1915 		/* Wake the log thread. */
1916 		errcode = pthread_cond_signal(&ta->need_commits);
1917 		if (errcode)
1918 			return got_error_set_errno(errcode,
1919 			    "pthread_cond_signal");
1920 
1921 		/*
1922 		 * The mutex will be released while the view loop waits
1923 		 * in wgetch(), at which time the log thread will run.
1924 		 */
1925 		if (!wait)
1926 			break;
1927 
1928 		/* Display progress update in log view. */
1929 		show_log_view(view);
1930 		update_panels();
1931 		doupdate();
1932 
1933 		/* Wait right here while next commit is being loaded. */
1934 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1935 		if (errcode)
1936 			return got_error_set_errno(errcode,
1937 			    "pthread_cond_wait");
1938 
1939 		/* Display progress update in log view. */
1940 		show_log_view(view);
1941 		update_panels();
1942 		doupdate();
1943 	}
1944 
1945 	return NULL;
1946 }
1947 
1948 static const struct got_error *
1949 log_scroll_down(struct tog_view *view, int maxscroll)
1950 {
1951 	struct tog_log_view_state *s = &view->state.log;
1952 	const struct got_error *err = NULL;
1953 	struct commit_queue_entry *pentry;
1954 	int nscrolled = 0, ncommits_needed;
1955 
1956 	if (s->last_displayed_entry == NULL)
1957 		return NULL;
1958 
1959 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
1960 	if (s->commits.ncommits < ncommits_needed &&
1961 	    !s->thread_args.log_complete) {
1962 		/*
1963 		 * Ask the log thread for required amount of commits.
1964 		 */
1965 		s->thread_args.commits_needed += maxscroll;
1966 		err = trigger_log_thread(view, 1);
1967 		if (err)
1968 			return err;
1969 	}
1970 
1971 	do {
1972 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1973 		if (pentry == NULL)
1974 			break;
1975 
1976 		s->last_displayed_entry = pentry;
1977 
1978 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1979 		if (pentry == NULL)
1980 			break;
1981 		s->first_displayed_entry = pentry;
1982 	} while (++nscrolled < maxscroll);
1983 
1984 	return err;
1985 }
1986 
1987 static const struct got_error *
1988 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1989     struct got_commit_object *commit, struct got_object_id *commit_id,
1990     struct tog_view *log_view, struct got_repository *repo)
1991 {
1992 	const struct got_error *err;
1993 	struct got_object_qid *parent_id;
1994 	struct tog_view *diff_view;
1995 
1996 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1997 	if (diff_view == NULL)
1998 		return got_error_from_errno("view_open");
1999 
2000 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2001 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2002 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2003 	if (err == NULL)
2004 		*new_view = diff_view;
2005 	return err;
2006 }
2007 
2008 static const struct got_error *
2009 tree_view_visit_subtree(struct tog_tree_view_state *s,
2010     struct got_tree_object *subtree)
2011 {
2012 	struct tog_parent_tree *parent;
2013 
2014 	parent = calloc(1, sizeof(*parent));
2015 	if (parent == NULL)
2016 		return got_error_from_errno("calloc");
2017 
2018 	parent->tree = s->tree;
2019 	parent->first_displayed_entry = s->first_displayed_entry;
2020 	parent->selected_entry = s->selected_entry;
2021 	parent->selected = s->selected;
2022 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2023 	s->tree = subtree;
2024 	s->selected = 0;
2025 	s->first_displayed_entry = NULL;
2026 	return NULL;
2027 }
2028 
2029 static const struct got_error *
2030 tree_view_walk_path(struct tog_tree_view_state *s,
2031     struct got_commit_object *commit, const char *path)
2032 {
2033 	const struct got_error *err = NULL;
2034 	struct got_tree_object *tree = NULL;
2035 	const char *p;
2036 	char *slash, *subpath = NULL;
2037 
2038 	/* Walk the path and open corresponding tree objects. */
2039 	p = path;
2040 	while (*p) {
2041 		struct got_tree_entry *te;
2042 		struct got_object_id *tree_id;
2043 		char *te_name;
2044 
2045 		while (p[0] == '/')
2046 			p++;
2047 
2048 		/* Ensure the correct subtree entry is selected. */
2049 		slash = strchr(p, '/');
2050 		if (slash == NULL)
2051 			te_name = strdup(p);
2052 		else
2053 			te_name = strndup(p, slash - p);
2054 		if (te_name == NULL) {
2055 			err = got_error_from_errno("strndup");
2056 			break;
2057 		}
2058 		te = got_object_tree_find_entry(s->tree, te_name);
2059 		if (te == NULL) {
2060 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2061 			free(te_name);
2062 			break;
2063 		}
2064 		free(te_name);
2065 		s->first_displayed_entry = s->selected_entry = te;
2066 
2067 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2068 			break; /* jump to this file's entry */
2069 
2070 		slash = strchr(p, '/');
2071 		if (slash)
2072 			subpath = strndup(path, slash - path);
2073 		else
2074 			subpath = strdup(path);
2075 		if (subpath == NULL) {
2076 			err = got_error_from_errno("strdup");
2077 			break;
2078 		}
2079 
2080 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2081 		    subpath);
2082 		if (err)
2083 			break;
2084 
2085 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2086 		free(tree_id);
2087 		if (err)
2088 			break;
2089 
2090 		err = tree_view_visit_subtree(s, tree);
2091 		if (err) {
2092 			got_object_tree_close(tree);
2093 			break;
2094 		}
2095 		if (slash == NULL)
2096 			break;
2097 		free(subpath);
2098 		subpath = NULL;
2099 		p = slash;
2100 	}
2101 
2102 	free(subpath);
2103 	return err;
2104 }
2105 
2106 static const struct got_error *
2107 browse_commit_tree(struct tog_view **new_view, int begin_x,
2108     struct commit_queue_entry *entry, const char *path,
2109     const char *head_ref_name, struct got_repository *repo)
2110 {
2111 	const struct got_error *err = NULL;
2112 	struct tog_tree_view_state *s;
2113 	struct tog_view *tree_view;
2114 
2115 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
2116 	if (tree_view == NULL)
2117 		return got_error_from_errno("view_open");
2118 
2119 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2120 	if (err)
2121 		return err;
2122 	s = &tree_view->state.tree;
2123 
2124 	*new_view = tree_view;
2125 
2126 	if (got_path_is_root_dir(path))
2127 		return NULL;
2128 
2129 	return tree_view_walk_path(s, entry->commit, path);
2130 }
2131 
2132 static const struct got_error *
2133 block_signals_used_by_main_thread(void)
2134 {
2135 	sigset_t sigset;
2136 	int errcode;
2137 
2138 	if (sigemptyset(&sigset) == -1)
2139 		return got_error_from_errno("sigemptyset");
2140 
2141 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2142 	if (sigaddset(&sigset, SIGWINCH) == -1)
2143 		return got_error_from_errno("sigaddset");
2144 	if (sigaddset(&sigset, SIGCONT) == -1)
2145 		return got_error_from_errno("sigaddset");
2146 	if (sigaddset(&sigset, SIGINT) == -1)
2147 		return got_error_from_errno("sigaddset");
2148 	if (sigaddset(&sigset, SIGTERM) == -1)
2149 		return got_error_from_errno("sigaddset");
2150 
2151 	/* ncurses handles SIGTSTP */
2152 	if (sigaddset(&sigset, SIGTSTP) == -1)
2153 		return got_error_from_errno("sigaddset");
2154 
2155 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2156 	if (errcode)
2157 		return got_error_set_errno(errcode, "pthread_sigmask");
2158 
2159 	return NULL;
2160 }
2161 
2162 static void *
2163 log_thread(void *arg)
2164 {
2165 	const struct got_error *err = NULL;
2166 	int errcode = 0;
2167 	struct tog_log_thread_args *a = arg;
2168 	int done = 0;
2169 
2170 	err = block_signals_used_by_main_thread();
2171 	if (err)
2172 		return (void *)err;
2173 
2174 	while (!done && !err && !tog_fatal_signal_received()) {
2175 		err = queue_commits(a);
2176 		if (err) {
2177 			if (err->code != GOT_ERR_ITER_COMPLETED)
2178 				return (void *)err;
2179 			err = NULL;
2180 			done = 1;
2181 		} else if (a->commits_needed > 0 && !a->load_all)
2182 			a->commits_needed--;
2183 
2184 		errcode = pthread_mutex_lock(&tog_mutex);
2185 		if (errcode) {
2186 			err = got_error_set_errno(errcode,
2187 			    "pthread_mutex_lock");
2188 			break;
2189 		} else if (*a->quit)
2190 			done = 1;
2191 		else if (*a->first_displayed_entry == NULL) {
2192 			*a->first_displayed_entry =
2193 			    TAILQ_FIRST(&a->commits->head);
2194 			*a->selected_entry = *a->first_displayed_entry;
2195 		}
2196 
2197 		errcode = pthread_cond_signal(&a->commit_loaded);
2198 		if (errcode) {
2199 			err = got_error_set_errno(errcode,
2200 			    "pthread_cond_signal");
2201 			pthread_mutex_unlock(&tog_mutex);
2202 			break;
2203 		}
2204 
2205 		if (done)
2206 			a->commits_needed = 0;
2207 		else {
2208 			if (a->commits_needed == 0 && !a->load_all) {
2209 				errcode = pthread_cond_wait(&a->need_commits,
2210 				    &tog_mutex);
2211 				if (errcode)
2212 					err = got_error_set_errno(errcode,
2213 					    "pthread_cond_wait");
2214 				if (*a->quit)
2215 					done = 1;
2216 			}
2217 		}
2218 
2219 		errcode = pthread_mutex_unlock(&tog_mutex);
2220 		if (errcode && err == NULL)
2221 			err = got_error_set_errno(errcode,
2222 			    "pthread_mutex_unlock");
2223 	}
2224 	a->log_complete = 1;
2225 	return (void *)err;
2226 }
2227 
2228 static const struct got_error *
2229 stop_log_thread(struct tog_log_view_state *s)
2230 {
2231 	const struct got_error *err = NULL;
2232 	int errcode;
2233 
2234 	if (s->thread) {
2235 		s->quit = 1;
2236 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2237 		if (errcode)
2238 			return got_error_set_errno(errcode,
2239 			    "pthread_cond_signal");
2240 		errcode = pthread_mutex_unlock(&tog_mutex);
2241 		if (errcode)
2242 			return got_error_set_errno(errcode,
2243 			    "pthread_mutex_unlock");
2244 		errcode = pthread_join(s->thread, (void **)&err);
2245 		if (errcode)
2246 			return got_error_set_errno(errcode, "pthread_join");
2247 		errcode = pthread_mutex_lock(&tog_mutex);
2248 		if (errcode)
2249 			return got_error_set_errno(errcode,
2250 			    "pthread_mutex_lock");
2251 		s->thread = NULL;
2252 	}
2253 
2254 	if (s->thread_args.repo) {
2255 		err = got_repo_close(s->thread_args.repo);
2256 		s->thread_args.repo = NULL;
2257 	}
2258 
2259 	if (s->thread_args.pack_fds) {
2260 		const struct got_error *pack_err =
2261 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2262 		if (err == NULL)
2263 			err = pack_err;
2264 		s->thread_args.pack_fds = NULL;
2265 	}
2266 
2267 	if (s->thread_args.graph) {
2268 		got_commit_graph_close(s->thread_args.graph);
2269 		s->thread_args.graph = NULL;
2270 	}
2271 
2272 	return err;
2273 }
2274 
2275 static const struct got_error *
2276 close_log_view(struct tog_view *view)
2277 {
2278 	const struct got_error *err = NULL;
2279 	struct tog_log_view_state *s = &view->state.log;
2280 	int errcode;
2281 
2282 	err = stop_log_thread(s);
2283 
2284 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2285 	if (errcode && err == NULL)
2286 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2287 
2288 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2289 	if (errcode && err == NULL)
2290 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2291 
2292 	free_commits(&s->commits);
2293 	free(s->in_repo_path);
2294 	s->in_repo_path = NULL;
2295 	free(s->start_id);
2296 	s->start_id = NULL;
2297 	free(s->head_ref_name);
2298 	s->head_ref_name = NULL;
2299 	return err;
2300 }
2301 
2302 static const struct got_error *
2303 search_start_log_view(struct tog_view *view)
2304 {
2305 	struct tog_log_view_state *s = &view->state.log;
2306 
2307 	s->matched_entry = NULL;
2308 	s->search_entry = NULL;
2309 	return NULL;
2310 }
2311 
2312 static const struct got_error *
2313 search_next_log_view(struct tog_view *view)
2314 {
2315 	const struct got_error *err = NULL;
2316 	struct tog_log_view_state *s = &view->state.log;
2317 	struct commit_queue_entry *entry;
2318 
2319 	/* Display progress update in log view. */
2320 	show_log_view(view);
2321 	update_panels();
2322 	doupdate();
2323 
2324 	if (s->search_entry) {
2325 		int errcode, ch;
2326 		errcode = pthread_mutex_unlock(&tog_mutex);
2327 		if (errcode)
2328 			return got_error_set_errno(errcode,
2329 			    "pthread_mutex_unlock");
2330 		ch = wgetch(view->window);
2331 		errcode = pthread_mutex_lock(&tog_mutex);
2332 		if (errcode)
2333 			return got_error_set_errno(errcode,
2334 			    "pthread_mutex_lock");
2335 		if (ch == KEY_BACKSPACE) {
2336 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2337 			return NULL;
2338 		}
2339 		if (view->searching == TOG_SEARCH_FORWARD)
2340 			entry = TAILQ_NEXT(s->search_entry, entry);
2341 		else
2342 			entry = TAILQ_PREV(s->search_entry,
2343 			    commit_queue_head, entry);
2344 	} else if (s->matched_entry) {
2345 		int matched_idx = s->matched_entry->idx;
2346 		int selected_idx = s->selected_entry->idx;
2347 
2348 		/*
2349 		 * If user has moved cursor after we hit the match, position
2350 		 * from where we should continue search must be changed.
2351 		 */
2352 		if (view->searching == TOG_SEARCH_FORWARD) {
2353 			if (matched_idx > selected_idx)
2354 				entry = TAILQ_NEXT(s->selected_entry, entry);
2355 			else
2356 				entry = TAILQ_NEXT(s->matched_entry, entry);
2357 		} else {
2358 			if (matched_idx < selected_idx)
2359 				entry = TAILQ_PREV(s->selected_entry,
2360 						commit_queue_head, entry);
2361 			else
2362 				entry = TAILQ_PREV(s->matched_entry,
2363 						commit_queue_head, entry);
2364 		}
2365 	} else {
2366 		entry = s->selected_entry;
2367 	}
2368 
2369 	while (1) {
2370 		int have_match = 0;
2371 
2372 		if (entry == NULL) {
2373 			if (s->thread_args.log_complete ||
2374 			    view->searching == TOG_SEARCH_BACKWARD) {
2375 				view->search_next_done =
2376 				    (s->matched_entry == NULL ?
2377 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2378 				s->search_entry = NULL;
2379 				return NULL;
2380 			}
2381 			/*
2382 			 * Poke the log thread for more commits and return,
2383 			 * allowing the main loop to make progress. Search
2384 			 * will resume at s->search_entry once we come back.
2385 			 */
2386 			s->thread_args.commits_needed++;
2387 			return trigger_log_thread(view, 0);
2388 		}
2389 
2390 		err = match_commit(&have_match, entry->id, entry->commit,
2391 		    &view->regex);
2392 		if (err)
2393 			break;
2394 		if (have_match) {
2395 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2396 			s->matched_entry = entry;
2397 			break;
2398 		}
2399 
2400 		s->search_entry = entry;
2401 		if (view->searching == TOG_SEARCH_FORWARD)
2402 			entry = TAILQ_NEXT(entry, entry);
2403 		else
2404 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2405 	}
2406 
2407 	if (s->matched_entry) {
2408 		int cur = s->selected_entry->idx;
2409 		while (cur < s->matched_entry->idx) {
2410 			err = input_log_view(NULL, view, KEY_DOWN);
2411 			if (err)
2412 				return err;
2413 			cur++;
2414 		}
2415 		while (cur > s->matched_entry->idx) {
2416 			err = input_log_view(NULL, view, KEY_UP);
2417 			if (err)
2418 				return err;
2419 			cur--;
2420 		}
2421 	}
2422 
2423 	s->search_entry = NULL;
2424 
2425 	return NULL;
2426 }
2427 
2428 static const struct got_error *
2429 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2430     struct got_repository *repo, const char *head_ref_name,
2431     const char *in_repo_path, int log_branches)
2432 {
2433 	const struct got_error *err = NULL;
2434 	struct tog_log_view_state *s = &view->state.log;
2435 	struct got_repository *thread_repo = NULL;
2436 	struct got_commit_graph *thread_graph = NULL;
2437 	int errcode;
2438 
2439 	if (in_repo_path != s->in_repo_path) {
2440 		free(s->in_repo_path);
2441 		s->in_repo_path = strdup(in_repo_path);
2442 		if (s->in_repo_path == NULL)
2443 			return got_error_from_errno("strdup");
2444 	}
2445 
2446 	/* The commit queue only contains commits being displayed. */
2447 	TAILQ_INIT(&s->commits.head);
2448 	s->commits.ncommits = 0;
2449 
2450 	s->repo = repo;
2451 	if (head_ref_name) {
2452 		s->head_ref_name = strdup(head_ref_name);
2453 		if (s->head_ref_name == NULL) {
2454 			err = got_error_from_errno("strdup");
2455 			goto done;
2456 		}
2457 	}
2458 	s->start_id = got_object_id_dup(start_id);
2459 	if (s->start_id == NULL) {
2460 		err = got_error_from_errno("got_object_id_dup");
2461 		goto done;
2462 	}
2463 	s->log_branches = log_branches;
2464 
2465 	STAILQ_INIT(&s->colors);
2466 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2467 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2468 		    get_color_value("TOG_COLOR_COMMIT"));
2469 		if (err)
2470 			goto done;
2471 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2472 		    get_color_value("TOG_COLOR_AUTHOR"));
2473 		if (err) {
2474 			free_colors(&s->colors);
2475 			goto done;
2476 		}
2477 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2478 		    get_color_value("TOG_COLOR_DATE"));
2479 		if (err) {
2480 			free_colors(&s->colors);
2481 			goto done;
2482 		}
2483 	}
2484 
2485 	view->show = show_log_view;
2486 	view->input = input_log_view;
2487 	view->close = close_log_view;
2488 	view->search_start = search_start_log_view;
2489 	view->search_next = search_next_log_view;
2490 
2491 	if (s->thread_args.pack_fds == NULL) {
2492 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2493 		if (err)
2494 			goto done;
2495 	}
2496 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2497 	    s->thread_args.pack_fds);
2498 	if (err)
2499 		goto done;
2500 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2501 	    !s->log_branches);
2502 	if (err)
2503 		goto done;
2504 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2505 	    s->repo, NULL, NULL);
2506 	if (err)
2507 		goto done;
2508 
2509 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2510 	if (errcode) {
2511 		err = got_error_set_errno(errcode, "pthread_cond_init");
2512 		goto done;
2513 	}
2514 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2515 	if (errcode) {
2516 		err = got_error_set_errno(errcode, "pthread_cond_init");
2517 		goto done;
2518 	}
2519 
2520 	s->thread_args.commits_needed = view->nlines;
2521 	s->thread_args.graph = thread_graph;
2522 	s->thread_args.commits = &s->commits;
2523 	s->thread_args.in_repo_path = s->in_repo_path;
2524 	s->thread_args.start_id = s->start_id;
2525 	s->thread_args.repo = thread_repo;
2526 	s->thread_args.log_complete = 0;
2527 	s->thread_args.quit = &s->quit;
2528 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2529 	s->thread_args.selected_entry = &s->selected_entry;
2530 	s->thread_args.searching = &view->searching;
2531 	s->thread_args.search_next_done = &view->search_next_done;
2532 	s->thread_args.regex = &view->regex;
2533 done:
2534 	if (err)
2535 		close_log_view(view);
2536 	return err;
2537 }
2538 
2539 static const struct got_error *
2540 show_log_view(struct tog_view *view)
2541 {
2542 	const struct got_error *err;
2543 	struct tog_log_view_state *s = &view->state.log;
2544 
2545 	if (s->thread == NULL) {
2546 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2547 		    &s->thread_args);
2548 		if (errcode)
2549 			return got_error_set_errno(errcode, "pthread_create");
2550 		if (s->thread_args.commits_needed > 0) {
2551 			err = trigger_log_thread(view, 1);
2552 			if (err)
2553 				return err;
2554 		}
2555 	}
2556 
2557 	return draw_commits(view);
2558 }
2559 
2560 static const struct got_error *
2561 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2562 {
2563 	const struct got_error *err = NULL;
2564 	struct tog_log_view_state *s = &view->state.log;
2565 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2566 	struct tog_view *ref_view = NULL;
2567 	struct commit_queue_entry *entry;
2568 	int begin_x = 0, n, nscroll = view->nlines - 1;
2569 
2570 	if (s->thread_args.load_all) {
2571 		if (ch == KEY_BACKSPACE)
2572 			s->thread_args.load_all = 0;
2573 		else if (s->thread_args.log_complete) {
2574 			s->thread_args.load_all = 0;
2575 			log_scroll_down(view, s->commits.ncommits);
2576 			s->selected = MIN(view->nlines - 2,
2577 			    s->commits.ncommits - 1);
2578 			select_commit(s);
2579 		}
2580 		return NULL;
2581 	}
2582 
2583 	switch (ch) {
2584 	case 'q':
2585 		s->quit = 1;
2586 		break;
2587 	case '0':
2588 		view->x = 0;
2589 		break;
2590 	case '$':
2591 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2592 		break;
2593 	case KEY_RIGHT:
2594 	case 'l':
2595 		if (view->x + view->ncols / 2 < view->maxx)
2596 			view->x += 2;  /* move two columns right */
2597 		break;
2598 	case KEY_LEFT:
2599 	case 'h':
2600 		view->x -= MIN(view->x, 2);  /* move two columns back */
2601 		break;
2602 	case 'k':
2603 	case KEY_UP:
2604 	case '<':
2605 	case ',':
2606 	case CTRL('p'):
2607 		if (s->first_displayed_entry == NULL)
2608 			break;
2609 		if (s->selected > 0)
2610 			s->selected--;
2611 		else
2612 			log_scroll_up(s, 1);
2613 		select_commit(s);
2614 		break;
2615 	case 'g':
2616 	case KEY_HOME:
2617 		s->selected = 0;
2618 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2619 		select_commit(s);
2620 		break;
2621 	case CTRL('u'):
2622 	case 'u':
2623 		nscroll /= 2;
2624 		/* FALL THROUGH */
2625 	case KEY_PPAGE:
2626 	case CTRL('b'):
2627 		if (s->first_displayed_entry == NULL)
2628 			break;
2629 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2630 			s->selected = MAX(0, s->selected - nscroll - 1);
2631 		else
2632 			log_scroll_up(s, nscroll);
2633 		select_commit(s);
2634 		break;
2635 	case 'j':
2636 	case KEY_DOWN:
2637 	case '>':
2638 	case '.':
2639 	case CTRL('n'):
2640 		if (s->first_displayed_entry == NULL)
2641 			break;
2642 		if (s->selected < MIN(view->nlines - 2,
2643 		    s->commits.ncommits - 1))
2644 			s->selected++;
2645 		else {
2646 			err = log_scroll_down(view, 1);
2647 			if (err)
2648 				break;
2649 		}
2650 		select_commit(s);
2651 		break;
2652 	case 'G':
2653 	case KEY_END: {
2654 		/* We don't know yet how many commits, so we're forced to
2655 		 * traverse them all. */
2656 		if (!s->thread_args.log_complete) {
2657 			s->thread_args.load_all = 1;
2658 			return trigger_log_thread(view, 0);
2659 		}
2660 
2661 		s->selected = 0;
2662 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2663 		for (n = 0; n < view->nlines - 1; n++) {
2664 			if (entry == NULL)
2665 				break;
2666 			s->first_displayed_entry = entry;
2667 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2668 		}
2669 		if (n > 0)
2670 			s->selected = n - 1;
2671 		select_commit(s);
2672 		break;
2673 	}
2674 	case CTRL('d'):
2675 	case 'd':
2676 		nscroll /= 2;
2677 		/* FALL THROUGH */
2678 	case KEY_NPAGE:
2679 	case CTRL('f'): {
2680 		struct commit_queue_entry *first;
2681 		first = s->first_displayed_entry;
2682 		if (first == NULL)
2683 			break;
2684 		err = log_scroll_down(view, nscroll);
2685 		if (err)
2686 			break;
2687 		if (first == s->first_displayed_entry &&
2688 		    s->selected < MIN(view->nlines - 2,
2689 		    s->commits.ncommits - 1)) {
2690 			/* can't scroll further down */
2691 			s->selected += MIN(s->last_displayed_entry->idx -
2692 			    s->selected_entry->idx, nscroll + 1);
2693 		}
2694 		select_commit(s);
2695 		break;
2696 	}
2697 	case KEY_RESIZE:
2698 		if (s->selected > view->nlines - 2)
2699 			s->selected = view->nlines - 2;
2700 		if (s->selected > s->commits.ncommits - 1)
2701 			s->selected = s->commits.ncommits - 1;
2702 		select_commit(s);
2703 		if (s->commits.ncommits < view->nlines - 1 &&
2704 		    !s->thread_args.log_complete) {
2705 			s->thread_args.commits_needed += (view->nlines - 1) -
2706 			    s->commits.ncommits;
2707 			err = trigger_log_thread(view, 1);
2708 		}
2709 		break;
2710 	case KEY_ENTER:
2711 	case ' ':
2712 	case '\r':
2713 		if (s->selected_entry == NULL)
2714 			break;
2715 		if (view_is_parent_view(view))
2716 			begin_x = view_split_begin_x(view->begin_x);
2717 		err = open_diff_view_for_commit(&diff_view, begin_x,
2718 		    s->selected_entry->commit, s->selected_entry->id,
2719 		    view, s->repo);
2720 		if (err)
2721 			break;
2722 		view->focussed = 0;
2723 		diff_view->focussed = 1;
2724 		if (view_is_parent_view(view)) {
2725 			err = view_close_child(view);
2726 			if (err)
2727 				return err;
2728 			err = view_set_child(view, diff_view);
2729 			if (err)
2730 				return err;
2731 			view->focus_child = 1;
2732 		} else
2733 			*new_view = diff_view;
2734 		break;
2735 	case 't':
2736 		if (s->selected_entry == NULL)
2737 			break;
2738 		if (view_is_parent_view(view))
2739 			begin_x = view_split_begin_x(view->begin_x);
2740 		err = browse_commit_tree(&tree_view, begin_x,
2741 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2742 		    s->repo);
2743 		if (err)
2744 			break;
2745 		view->focussed = 0;
2746 		tree_view->focussed = 1;
2747 		if (view_is_parent_view(view)) {
2748 			err = view_close_child(view);
2749 			if (err)
2750 				return err;
2751 			err = view_set_child(view, tree_view);
2752 			if (err)
2753 				return err;
2754 			view->focus_child = 1;
2755 		} else
2756 			*new_view = tree_view;
2757 		break;
2758 	case KEY_BACKSPACE:
2759 	case CTRL('l'):
2760 	case 'B':
2761 		if (ch == KEY_BACKSPACE &&
2762 		    got_path_is_root_dir(s->in_repo_path))
2763 			break;
2764 		err = stop_log_thread(s);
2765 		if (err)
2766 			return err;
2767 		if (ch == KEY_BACKSPACE) {
2768 			char *parent_path;
2769 			err = got_path_dirname(&parent_path, s->in_repo_path);
2770 			if (err)
2771 				return err;
2772 			free(s->in_repo_path);
2773 			s->in_repo_path = parent_path;
2774 			s->thread_args.in_repo_path = s->in_repo_path;
2775 		} else if (ch == CTRL('l')) {
2776 			struct got_object_id *start_id;
2777 			err = got_repo_match_object_id(&start_id, NULL,
2778 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2779 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2780 			if (err)
2781 				return err;
2782 			free(s->start_id);
2783 			s->start_id = start_id;
2784 			s->thread_args.start_id = s->start_id;
2785 		} else /* 'B' */
2786 			s->log_branches = !s->log_branches;
2787 
2788 		if (s->thread_args.pack_fds == NULL) {
2789 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2790 			if (err)
2791 				return err;
2792 		}
2793 		err = got_repo_open(&s->thread_args.repo,
2794 		    got_repo_get_path(s->repo), NULL,
2795 		    s->thread_args.pack_fds);
2796 		if (err)
2797 			return err;
2798 		tog_free_refs();
2799 		err = tog_load_refs(s->repo, 0);
2800 		if (err)
2801 			return err;
2802 		err = got_commit_graph_open(&s->thread_args.graph,
2803 		    s->in_repo_path, !s->log_branches);
2804 		if (err)
2805 			return err;
2806 		err = got_commit_graph_iter_start(s->thread_args.graph,
2807 		    s->start_id, s->repo, NULL, NULL);
2808 		if (err)
2809 			return err;
2810 		free_commits(&s->commits);
2811 		s->first_displayed_entry = NULL;
2812 		s->last_displayed_entry = NULL;
2813 		s->selected_entry = NULL;
2814 		s->selected = 0;
2815 		s->thread_args.log_complete = 0;
2816 		s->quit = 0;
2817 		s->thread_args.commits_needed = view->nlines;
2818 		s->matched_entry = NULL;
2819 		s->search_entry = NULL;
2820 		break;
2821 	case 'r':
2822 		if (view_is_parent_view(view))
2823 			begin_x = view_split_begin_x(view->begin_x);
2824 		ref_view = view_open(view->nlines, view->ncols,
2825 		    view->begin_y, begin_x, TOG_VIEW_REF);
2826 		if (ref_view == NULL)
2827 			return got_error_from_errno("view_open");
2828 		err = open_ref_view(ref_view, s->repo);
2829 		if (err) {
2830 			view_close(ref_view);
2831 			return err;
2832 		}
2833 		view->focussed = 0;
2834 		ref_view->focussed = 1;
2835 		if (view_is_parent_view(view)) {
2836 			err = view_close_child(view);
2837 			if (err)
2838 				return err;
2839 			err = view_set_child(view, ref_view);
2840 			if (err)
2841 				return err;
2842 			view->focus_child = 1;
2843 		} else
2844 			*new_view = ref_view;
2845 		break;
2846 	default:
2847 		break;
2848 	}
2849 
2850 	return err;
2851 }
2852 
2853 static const struct got_error *
2854 apply_unveil(const char *repo_path, const char *worktree_path)
2855 {
2856 	const struct got_error *error;
2857 
2858 #ifdef PROFILE
2859 	if (unveil("gmon.out", "rwc") != 0)
2860 		return got_error_from_errno2("unveil", "gmon.out");
2861 #endif
2862 	if (repo_path && unveil(repo_path, "r") != 0)
2863 		return got_error_from_errno2("unveil", repo_path);
2864 
2865 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2866 		return got_error_from_errno2("unveil", worktree_path);
2867 
2868 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2869 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2870 
2871 	error = got_privsep_unveil_exec_helpers();
2872 	if (error != NULL)
2873 		return error;
2874 
2875 	if (unveil(NULL, NULL) != 0)
2876 		return got_error_from_errno("unveil");
2877 
2878 	return NULL;
2879 }
2880 
2881 static void
2882 init_curses(void)
2883 {
2884 	/*
2885 	 * Override default signal handlers before starting ncurses.
2886 	 * This should prevent ncurses from installing its own
2887 	 * broken cleanup() signal handler.
2888 	 */
2889 	signal(SIGWINCH, tog_sigwinch);
2890 	signal(SIGPIPE, tog_sigpipe);
2891 	signal(SIGCONT, tog_sigcont);
2892 	signal(SIGINT, tog_sigint);
2893 	signal(SIGTERM, tog_sigterm);
2894 
2895 	initscr();
2896 	cbreak();
2897 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2898 	noecho();
2899 	nonl();
2900 	intrflush(stdscr, FALSE);
2901 	keypad(stdscr, TRUE);
2902 	curs_set(0);
2903 	if (getenv("TOG_COLORS") != NULL) {
2904 		start_color();
2905 		use_default_colors();
2906 	}
2907 }
2908 
2909 static const struct got_error *
2910 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2911     struct got_repository *repo, struct got_worktree *worktree)
2912 {
2913 	const struct got_error *err = NULL;
2914 
2915 	if (argc == 0) {
2916 		*in_repo_path = strdup("/");
2917 		if (*in_repo_path == NULL)
2918 			return got_error_from_errno("strdup");
2919 		return NULL;
2920 	}
2921 
2922 	if (worktree) {
2923 		const char *prefix = got_worktree_get_path_prefix(worktree);
2924 		char *p;
2925 
2926 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2927 		if (err)
2928 			return err;
2929 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2930 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2931 		    p) == -1) {
2932 			err = got_error_from_errno("asprintf");
2933 			*in_repo_path = NULL;
2934 		}
2935 		free(p);
2936 	} else
2937 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2938 
2939 	return err;
2940 }
2941 
2942 static const struct got_error *
2943 cmd_log(int argc, char *argv[])
2944 {
2945 	const struct got_error *error;
2946 	struct got_repository *repo = NULL;
2947 	struct got_worktree *worktree = NULL;
2948 	struct got_object_id *start_id = NULL;
2949 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2950 	char *start_commit = NULL, *label = NULL;
2951 	struct got_reference *ref = NULL;
2952 	const char *head_ref_name = NULL;
2953 	int ch, log_branches = 0;
2954 	struct tog_view *view;
2955 	int *pack_fds = NULL;
2956 
2957 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2958 		switch (ch) {
2959 		case 'b':
2960 			log_branches = 1;
2961 			break;
2962 		case 'c':
2963 			start_commit = optarg;
2964 			break;
2965 		case 'r':
2966 			repo_path = realpath(optarg, NULL);
2967 			if (repo_path == NULL)
2968 				return got_error_from_errno2("realpath",
2969 				    optarg);
2970 			break;
2971 		default:
2972 			usage_log();
2973 			/* NOTREACHED */
2974 		}
2975 	}
2976 
2977 	argc -= optind;
2978 	argv += optind;
2979 
2980 	if (argc > 1)
2981 		usage_log();
2982 
2983 	error = got_repo_pack_fds_open(&pack_fds);
2984 	if (error != NULL)
2985 		goto done;
2986 
2987 	if (repo_path == NULL) {
2988 		cwd = getcwd(NULL, 0);
2989 		if (cwd == NULL)
2990 			return got_error_from_errno("getcwd");
2991 		error = got_worktree_open(&worktree, cwd);
2992 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2993 			goto done;
2994 		if (worktree)
2995 			repo_path =
2996 			    strdup(got_worktree_get_repo_path(worktree));
2997 		else
2998 			repo_path = strdup(cwd);
2999 		if (repo_path == NULL) {
3000 			error = got_error_from_errno("strdup");
3001 			goto done;
3002 		}
3003 	}
3004 
3005 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3006 	if (error != NULL)
3007 		goto done;
3008 
3009 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3010 	    repo, worktree);
3011 	if (error)
3012 		goto done;
3013 
3014 	init_curses();
3015 
3016 	error = apply_unveil(got_repo_get_path(repo),
3017 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3018 	if (error)
3019 		goto done;
3020 
3021 	/* already loaded by tog_log_with_path()? */
3022 	if (TAILQ_EMPTY(&tog_refs)) {
3023 		error = tog_load_refs(repo, 0);
3024 		if (error)
3025 			goto done;
3026 	}
3027 
3028 	if (start_commit == NULL) {
3029 		error = got_repo_match_object_id(&start_id, &label,
3030 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3031 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3032 		if (error)
3033 			goto done;
3034 		head_ref_name = label;
3035 	} else {
3036 		error = got_ref_open(&ref, repo, start_commit, 0);
3037 		if (error == NULL)
3038 			head_ref_name = got_ref_get_name(ref);
3039 		else if (error->code != GOT_ERR_NOT_REF)
3040 			goto done;
3041 		error = got_repo_match_object_id(&start_id, NULL,
3042 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3043 		if (error)
3044 			goto done;
3045 	}
3046 
3047 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3048 	if (view == NULL) {
3049 		error = got_error_from_errno("view_open");
3050 		goto done;
3051 	}
3052 	error = open_log_view(view, start_id, repo, head_ref_name,
3053 	    in_repo_path, log_branches);
3054 	if (error)
3055 		goto done;
3056 	if (worktree) {
3057 		/* Release work tree lock. */
3058 		got_worktree_close(worktree);
3059 		worktree = NULL;
3060 	}
3061 	error = view_loop(view);
3062 done:
3063 	free(in_repo_path);
3064 	free(repo_path);
3065 	free(cwd);
3066 	free(start_id);
3067 	free(label);
3068 	if (ref)
3069 		got_ref_close(ref);
3070 	if (repo) {
3071 		const struct got_error *close_err = got_repo_close(repo);
3072 		if (error == NULL)
3073 			error = close_err;
3074 	}
3075 	if (worktree)
3076 		got_worktree_close(worktree);
3077 	if (pack_fds) {
3078 		const struct got_error *pack_err =
3079 		    got_repo_pack_fds_close(pack_fds);
3080 		if (error == NULL)
3081 			error = pack_err;
3082 	}
3083 	tog_free_refs();
3084 	return error;
3085 }
3086 
3087 __dead static void
3088 usage_diff(void)
3089 {
3090 	endwin();
3091 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3092 	    "[-w] object1 object2\n", getprogname());
3093 	exit(1);
3094 }
3095 
3096 static int
3097 match_line(const char *line, regex_t *regex, size_t nmatch,
3098     regmatch_t *regmatch)
3099 {
3100 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3101 }
3102 
3103 struct tog_color *
3104 match_color(struct tog_colors *colors, const char *line)
3105 {
3106 	struct tog_color *tc = NULL;
3107 
3108 	STAILQ_FOREACH(tc, colors, entry) {
3109 		if (match_line(line, &tc->regex, 0, NULL))
3110 			return tc;
3111 	}
3112 
3113 	return NULL;
3114 }
3115 
3116 static const struct got_error *
3117 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3118     WINDOW *window, int skipcol, regmatch_t *regmatch)
3119 {
3120 	const struct got_error *err = NULL;
3121 	char *exstr = NULL;
3122 	wchar_t *wline = NULL;
3123 	int rme, rms, n, width, scrollx;
3124 	int width0 = 0, width1 = 0, width2 = 0;
3125 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3126 
3127 	*wtotal = 0;
3128 
3129 	rms = regmatch->rm_so;
3130 	rme = regmatch->rm_eo;
3131 
3132 	err = expand_tab(&exstr, line);
3133 	if (err)
3134 		return err;
3135 
3136 	/* Split the line into 3 segments, according to match offsets. */
3137 	seg0 = strndup(exstr, rms);
3138 	if (seg0 == NULL) {
3139 		err = got_error_from_errno("strndup");
3140 		goto done;
3141 	}
3142 	seg1 = strndup(exstr + rms, rme - rms);
3143 	if (seg1 == NULL) {
3144 		err = got_error_from_errno("strndup");
3145 		goto done;
3146 	}
3147 	seg2 = strdup(exstr + rme);
3148 	if (seg2 == NULL) {
3149 		err = got_error_from_errno("strndup");
3150 		goto done;
3151 	}
3152 
3153 	/* draw up to matched token if we haven't scrolled past it */
3154 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3155 	    col_tab_align, 1);
3156 	if (err)
3157 		goto done;
3158 	n = MAX(width0 - skipcol, 0);
3159 	if (n) {
3160 		free(wline);
3161 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3162 		    wlimit, col_tab_align, 1);
3163 		if (err)
3164 			goto done;
3165 		waddwstr(window, &wline[scrollx]);
3166 		wlimit -= width;
3167 		*wtotal += width;
3168 	}
3169 
3170 	if (wlimit > 0) {
3171 		int i = 0, w = 0;
3172 		size_t wlen;
3173 
3174 		free(wline);
3175 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3176 		    col_tab_align, 1);
3177 		if (err)
3178 			goto done;
3179 		wlen = wcslen(wline);
3180 		while (i < wlen) {
3181 			width = wcwidth(wline[i]);
3182 			if (width == -1) {
3183 				/* should not happen, tabs are expanded */
3184 				err = got_error(GOT_ERR_RANGE);
3185 				goto done;
3186 			}
3187 			if (width0 + w + width > skipcol)
3188 				break;
3189 			w += width; 
3190 			i++;
3191 		}
3192 		/* draw (visible part of) matched token (if scrolled into it) */
3193 		if (width1 - w > 0) {
3194 			wattron(window, A_STANDOUT);
3195 			waddwstr(window, &wline[i]);
3196 			wattroff(window, A_STANDOUT);
3197 			wlimit -= (width1 - w);
3198 			*wtotal += (width1 - w);
3199 		}
3200 	}
3201 
3202 	if (wlimit > 0) {  /* draw rest of line */
3203 		free(wline);
3204 		if (skipcol > width0 + width1) {
3205 			err = format_line(&wline, &width2, &scrollx, seg2,
3206 			    skipcol - (width0 + width1), wlimit,
3207 			    col_tab_align, 1);
3208 			if (err)
3209 				goto done;
3210 			waddwstr(window, &wline[scrollx]);
3211 		} else {
3212 			err = format_line(&wline, &width2, NULL, seg2, 0,
3213 			    wlimit, col_tab_align, 1);
3214 			if (err)
3215 				goto done;
3216 			waddwstr(window, wline);
3217 		}
3218 		*wtotal += width2;
3219 	}
3220 done:
3221 	free(wline);
3222 	free(exstr);
3223 	free(seg0);
3224 	free(seg1);
3225 	free(seg2);
3226 	return err;
3227 }
3228 
3229 static const struct got_error *
3230 draw_file(struct tog_view *view, const char *header)
3231 {
3232 	struct tog_diff_view_state *s = &view->state.diff;
3233 	regmatch_t *regmatch = &view->regmatch;
3234 	const struct got_error *err;
3235 	int nprinted = 0;
3236 	char *line;
3237 	size_t linesize = 0;
3238 	ssize_t linelen;
3239 	struct tog_color *tc;
3240 	wchar_t *wline;
3241 	int width;
3242 	int max_lines = view->nlines;
3243 	int nlines = s->nlines;
3244 	off_t line_offset;
3245 
3246 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3247 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3248 		return got_error_from_errno("fseek");
3249 
3250 	werase(view->window);
3251 
3252 	if (header) {
3253 		if (asprintf(&line, "[%d/%d] %s",
3254 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3255 		    header) == -1)
3256 			return got_error_from_errno("asprintf");
3257 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3258 		    0, 0);
3259 		free(line);
3260 		if (err)
3261 			return err;
3262 
3263 		if (view_needs_focus_indication(view))
3264 			wstandout(view->window);
3265 		waddwstr(view->window, wline);
3266 		free(wline);
3267 		wline = NULL;
3268 		if (view_needs_focus_indication(view))
3269 			wstandend(view->window);
3270 		if (width <= view->ncols - 1)
3271 			waddch(view->window, '\n');
3272 
3273 		if (max_lines <= 1)
3274 			return NULL;
3275 		max_lines--;
3276 	}
3277 
3278 	s->eof = 0;
3279 	view->maxx = 0;
3280 	line = NULL;
3281 	while (max_lines > 0 && nprinted < max_lines) {
3282 		linelen = getline(&line, &linesize, s->f);
3283 		if (linelen == -1) {
3284 			if (feof(s->f)) {
3285 				s->eof = 1;
3286 				break;
3287 			}
3288 			free(line);
3289 			return got_ferror(s->f, GOT_ERR_IO);
3290 		}
3291 
3292 		/* Set view->maxx based on full line length. */
3293 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3294 		    view->x ? 1 : 0);
3295 		if (err) {
3296 			free(line);
3297 			return err;
3298 		}
3299 		view->maxx = MAX(view->maxx, width);
3300 		free(wline);
3301 		wline = NULL;
3302 
3303 		tc = match_color(&s->colors, line);
3304 		if (tc)
3305 			wattr_on(view->window,
3306 			    COLOR_PAIR(tc->colorpair), NULL);
3307 		if (s->first_displayed_line + nprinted == s->matched_line &&
3308 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3309 			err = add_matched_line(&width, line, view->ncols, 0,
3310 			    view->window, view->x, regmatch);
3311 			if (err) {
3312 				free(line);
3313 				return err;
3314 			}
3315 		} else {
3316 			int skip;
3317 			err = format_line(&wline, &width, &skip, line,
3318 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3319 			if (err) {
3320 				free(line);
3321 				return err;
3322 			}
3323 			waddwstr(view->window, &wline[skip]);
3324 			free(wline);
3325 			wline = NULL;
3326 		}
3327 		if (tc)
3328 			wattr_off(view->window,
3329 			    COLOR_PAIR(tc->colorpair), NULL);
3330 		if (width <= view->ncols - 1)
3331 			waddch(view->window, '\n');
3332 		nprinted++;
3333 	}
3334 	free(line);
3335 	if (nprinted >= 1)
3336 		s->last_displayed_line = s->first_displayed_line +
3337 		    (nprinted - 1);
3338 	else
3339 		s->last_displayed_line = s->first_displayed_line;
3340 
3341 	view_vborder(view);
3342 
3343 	if (s->eof) {
3344 		while (nprinted < view->nlines) {
3345 			waddch(view->window, '\n');
3346 			nprinted++;
3347 		}
3348 
3349 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3350 		    view->ncols, 0, 0);
3351 		if (err) {
3352 			return err;
3353 		}
3354 
3355 		wstandout(view->window);
3356 		waddwstr(view->window, wline);
3357 		free(wline);
3358 		wline = NULL;
3359 		wstandend(view->window);
3360 	}
3361 
3362 	return NULL;
3363 }
3364 
3365 static char *
3366 get_datestr(time_t *time, char *datebuf)
3367 {
3368 	struct tm mytm, *tm;
3369 	char *p, *s;
3370 
3371 	tm = gmtime_r(time, &mytm);
3372 	if (tm == NULL)
3373 		return NULL;
3374 	s = asctime_r(tm, datebuf);
3375 	if (s == NULL)
3376 		return NULL;
3377 	p = strchr(s, '\n');
3378 	if (p)
3379 		*p = '\0';
3380 	return s;
3381 }
3382 
3383 static const struct got_error *
3384 get_changed_paths(struct got_pathlist_head *paths,
3385     struct got_commit_object *commit, struct got_repository *repo)
3386 {
3387 	const struct got_error *err = NULL;
3388 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3389 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3390 	struct got_object_qid *qid;
3391 
3392 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3393 	if (qid != NULL) {
3394 		struct got_commit_object *pcommit;
3395 		err = got_object_open_as_commit(&pcommit, repo,
3396 		    &qid->id);
3397 		if (err)
3398 			return err;
3399 
3400 		tree_id1 = got_object_id_dup(
3401 		    got_object_commit_get_tree_id(pcommit));
3402 		if (tree_id1 == NULL) {
3403 			got_object_commit_close(pcommit);
3404 			return got_error_from_errno("got_object_id_dup");
3405 		}
3406 		got_object_commit_close(pcommit);
3407 
3408 	}
3409 
3410 	if (tree_id1) {
3411 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3412 		if (err)
3413 			goto done;
3414 	}
3415 
3416 	tree_id2 = got_object_commit_get_tree_id(commit);
3417 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3418 	if (err)
3419 		goto done;
3420 
3421 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3422 	    got_diff_tree_collect_changed_paths, paths, 0);
3423 done:
3424 	if (tree1)
3425 		got_object_tree_close(tree1);
3426 	if (tree2)
3427 		got_object_tree_close(tree2);
3428 	free(tree_id1);
3429 	return err;
3430 }
3431 
3432 static const struct got_error *
3433 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3434 {
3435 	off_t *p;
3436 
3437 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3438 	if (p == NULL)
3439 		return got_error_from_errno("reallocarray");
3440 	*line_offsets = p;
3441 	(*line_offsets)[*nlines] = off;
3442 	(*nlines)++;
3443 	return NULL;
3444 }
3445 
3446 static const struct got_error *
3447 write_commit_info(off_t **line_offsets, size_t *nlines,
3448     struct got_object_id *commit_id, struct got_reflist_head *refs,
3449     struct got_repository *repo, FILE *outfile)
3450 {
3451 	const struct got_error *err = NULL;
3452 	char datebuf[26], *datestr;
3453 	struct got_commit_object *commit;
3454 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3455 	time_t committer_time;
3456 	const char *author, *committer;
3457 	char *refs_str = NULL;
3458 	struct got_pathlist_head changed_paths;
3459 	struct got_pathlist_entry *pe;
3460 	off_t outoff = 0;
3461 	int n;
3462 
3463 	TAILQ_INIT(&changed_paths);
3464 
3465 	if (refs) {
3466 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3467 		if (err)
3468 			return err;
3469 	}
3470 
3471 	err = got_object_open_as_commit(&commit, repo, commit_id);
3472 	if (err)
3473 		return err;
3474 
3475 	err = got_object_id_str(&id_str, commit_id);
3476 	if (err) {
3477 		err = got_error_from_errno("got_object_id_str");
3478 		goto done;
3479 	}
3480 
3481 	err = add_line_offset(line_offsets, nlines, 0);
3482 	if (err)
3483 		goto done;
3484 
3485 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3486 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3487 	if (n < 0) {
3488 		err = got_error_from_errno("fprintf");
3489 		goto done;
3490 	}
3491 	outoff += n;
3492 	err = add_line_offset(line_offsets, nlines, outoff);
3493 	if (err)
3494 		goto done;
3495 
3496 	n = fprintf(outfile, "from: %s\n",
3497 	    got_object_commit_get_author(commit));
3498 	if (n < 0) {
3499 		err = got_error_from_errno("fprintf");
3500 		goto done;
3501 	}
3502 	outoff += n;
3503 	err = add_line_offset(line_offsets, nlines, outoff);
3504 	if (err)
3505 		goto done;
3506 
3507 	committer_time = got_object_commit_get_committer_time(commit);
3508 	datestr = get_datestr(&committer_time, datebuf);
3509 	if (datestr) {
3510 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3511 		if (n < 0) {
3512 			err = got_error_from_errno("fprintf");
3513 			goto done;
3514 		}
3515 		outoff += n;
3516 		err = add_line_offset(line_offsets, nlines, outoff);
3517 		if (err)
3518 			goto done;
3519 	}
3520 	author = got_object_commit_get_author(commit);
3521 	committer = got_object_commit_get_committer(commit);
3522 	if (strcmp(author, committer) != 0) {
3523 		n = fprintf(outfile, "via: %s\n", committer);
3524 		if (n < 0) {
3525 			err = got_error_from_errno("fprintf");
3526 			goto done;
3527 		}
3528 		outoff += n;
3529 		err = add_line_offset(line_offsets, nlines, outoff);
3530 		if (err)
3531 			goto done;
3532 	}
3533 	if (got_object_commit_get_nparents(commit) > 1) {
3534 		const struct got_object_id_queue *parent_ids;
3535 		struct got_object_qid *qid;
3536 		int pn = 1;
3537 		parent_ids = got_object_commit_get_parent_ids(commit);
3538 		STAILQ_FOREACH(qid, parent_ids, entry) {
3539 			err = got_object_id_str(&id_str, &qid->id);
3540 			if (err)
3541 				goto done;
3542 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3543 			if (n < 0) {
3544 				err = got_error_from_errno("fprintf");
3545 				goto done;
3546 			}
3547 			outoff += n;
3548 			err = add_line_offset(line_offsets, nlines, outoff);
3549 			if (err)
3550 				goto done;
3551 			free(id_str);
3552 			id_str = NULL;
3553 		}
3554 	}
3555 
3556 	err = got_object_commit_get_logmsg(&logmsg, commit);
3557 	if (err)
3558 		goto done;
3559 	s = logmsg;
3560 	while ((line = strsep(&s, "\n")) != NULL) {
3561 		n = fprintf(outfile, "%s\n", line);
3562 		if (n < 0) {
3563 			err = got_error_from_errno("fprintf");
3564 			goto done;
3565 		}
3566 		outoff += n;
3567 		err = add_line_offset(line_offsets, nlines, outoff);
3568 		if (err)
3569 			goto done;
3570 	}
3571 
3572 	err = get_changed_paths(&changed_paths, commit, repo);
3573 	if (err)
3574 		goto done;
3575 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3576 		struct got_diff_changed_path *cp = pe->data;
3577 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3578 		if (n < 0) {
3579 			err = got_error_from_errno("fprintf");
3580 			goto done;
3581 		}
3582 		outoff += n;
3583 		err = add_line_offset(line_offsets, nlines, outoff);
3584 		if (err)
3585 			goto done;
3586 		free((char *)pe->path);
3587 		free(pe->data);
3588 	}
3589 
3590 	fputc('\n', outfile);
3591 	outoff++;
3592 	err = add_line_offset(line_offsets, nlines, outoff);
3593 done:
3594 	got_pathlist_free(&changed_paths);
3595 	free(id_str);
3596 	free(logmsg);
3597 	free(refs_str);
3598 	got_object_commit_close(commit);
3599 	if (err) {
3600 		free(*line_offsets);
3601 		*line_offsets = NULL;
3602 		*nlines = 0;
3603 	}
3604 	return err;
3605 }
3606 
3607 static const struct got_error *
3608 create_diff(struct tog_diff_view_state *s)
3609 {
3610 	const struct got_error *err = NULL;
3611 	FILE *f = NULL;
3612 	int obj_type;
3613 
3614 	free(s->line_offsets);
3615 	s->line_offsets = malloc(sizeof(off_t));
3616 	if (s->line_offsets == NULL)
3617 		return got_error_from_errno("malloc");
3618 	s->nlines = 0;
3619 
3620 	f = got_opentemp();
3621 	if (f == NULL) {
3622 		err = got_error_from_errno("got_opentemp");
3623 		goto done;
3624 	}
3625 	if (s->f && fclose(s->f) == EOF) {
3626 		err = got_error_from_errno("fclose");
3627 		goto done;
3628 	}
3629 	s->f = f;
3630 
3631 	if (s->id1)
3632 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3633 	else
3634 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3635 	if (err)
3636 		goto done;
3637 
3638 	switch (obj_type) {
3639 	case GOT_OBJ_TYPE_BLOB:
3640 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3641 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3642 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3643 		    s->repo, s->f);
3644 		break;
3645 	case GOT_OBJ_TYPE_TREE:
3646 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3647 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3648 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3649 		break;
3650 	case GOT_OBJ_TYPE_COMMIT: {
3651 		const struct got_object_id_queue *parent_ids;
3652 		struct got_object_qid *pid;
3653 		struct got_commit_object *commit2;
3654 		struct got_reflist_head *refs;
3655 
3656 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3657 		if (err)
3658 			goto done;
3659 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3660 		/* Show commit info if we're diffing to a parent/root commit. */
3661 		if (s->id1 == NULL) {
3662 			err = write_commit_info(&s->line_offsets, &s->nlines,
3663 			    s->id2, refs, s->repo, s->f);
3664 			if (err)
3665 				goto done;
3666 		} else {
3667 			parent_ids = got_object_commit_get_parent_ids(commit2);
3668 			STAILQ_FOREACH(pid, parent_ids, entry) {
3669 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3670 					err = write_commit_info(
3671 					    &s->line_offsets, &s->nlines,
3672 					    s->id2, refs, s->repo, s->f);
3673 					if (err)
3674 						goto done;
3675 					break;
3676 				}
3677 			}
3678 		}
3679 		got_object_commit_close(commit2);
3680 
3681 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3682 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3683 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3684 		break;
3685 	}
3686 	default:
3687 		err = got_error(GOT_ERR_OBJ_TYPE);
3688 		break;
3689 	}
3690 	if (err)
3691 		goto done;
3692 done:
3693 	if (s->f && fflush(s->f) != 0 && err == NULL)
3694 		err = got_error_from_errno("fflush");
3695 	return err;
3696 }
3697 
3698 static void
3699 diff_view_indicate_progress(struct tog_view *view)
3700 {
3701 	mvwaddstr(view->window, 0, 0, "diffing...");
3702 	update_panels();
3703 	doupdate();
3704 }
3705 
3706 static const struct got_error *
3707 search_start_diff_view(struct tog_view *view)
3708 {
3709 	struct tog_diff_view_state *s = &view->state.diff;
3710 
3711 	s->matched_line = 0;
3712 	return NULL;
3713 }
3714 
3715 static const struct got_error *
3716 search_next_diff_view(struct tog_view *view)
3717 {
3718 	struct tog_diff_view_state *s = &view->state.diff;
3719 	const struct got_error *err = NULL;
3720 	int lineno;
3721 	char *line = NULL;
3722 	size_t linesize = 0;
3723 	ssize_t linelen;
3724 
3725 	if (!view->searching) {
3726 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3727 		return NULL;
3728 	}
3729 
3730 	if (s->matched_line) {
3731 		if (view->searching == TOG_SEARCH_FORWARD)
3732 			lineno = s->matched_line + 1;
3733 		else
3734 			lineno = s->matched_line - 1;
3735 	} else
3736 		lineno = s->first_displayed_line;
3737 
3738 	while (1) {
3739 		off_t offset;
3740 
3741 		if (lineno <= 0 || lineno > s->nlines) {
3742 			if (s->matched_line == 0) {
3743 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3744 				break;
3745 			}
3746 
3747 			if (view->searching == TOG_SEARCH_FORWARD)
3748 				lineno = 1;
3749 			else
3750 				lineno = s->nlines;
3751 		}
3752 
3753 		offset = s->line_offsets[lineno - 1];
3754 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3755 			free(line);
3756 			return got_error_from_errno("fseeko");
3757 		}
3758 		linelen = getline(&line, &linesize, s->f);
3759 		if (linelen != -1) {
3760 			char *exstr;
3761 			err = expand_tab(&exstr, line);
3762 			if (err)
3763 				break;
3764 			if (match_line(exstr, &view->regex, 1,
3765 			    &view->regmatch)) {
3766 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3767 				s->matched_line = lineno;
3768 				free(exstr);
3769 				break;
3770 			}
3771 			free(exstr);
3772 		}
3773 		if (view->searching == TOG_SEARCH_FORWARD)
3774 			lineno++;
3775 		else
3776 			lineno--;
3777 	}
3778 	free(line);
3779 
3780 	if (s->matched_line) {
3781 		s->first_displayed_line = s->matched_line;
3782 		s->selected_line = 1;
3783 	}
3784 
3785 	return err;
3786 }
3787 
3788 static const struct got_error *
3789 close_diff_view(struct tog_view *view)
3790 {
3791 	const struct got_error *err = NULL;
3792 	struct tog_diff_view_state *s = &view->state.diff;
3793 
3794 	free(s->id1);
3795 	s->id1 = NULL;
3796 	free(s->id2);
3797 	s->id2 = NULL;
3798 	if (s->f && fclose(s->f) == EOF)
3799 		err = got_error_from_errno("fclose");
3800 	s->f = NULL;
3801 	if (s->f1 && fclose(s->f1) == EOF)
3802 		err = got_error_from_errno("fclose");
3803 	s->f1 = NULL;
3804 	if (s->f2 && fclose(s->f2) == EOF)
3805 		err = got_error_from_errno("fclose");
3806 	s->f2 = NULL;
3807 	free_colors(&s->colors);
3808 	free(s->line_offsets);
3809 	s->line_offsets = NULL;
3810 	s->nlines = 0;
3811 	return err;
3812 }
3813 
3814 static const struct got_error *
3815 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3816     struct got_object_id *id2, const char *label1, const char *label2,
3817     int diff_context, int ignore_whitespace, int force_text_diff,
3818     struct tog_view *log_view, struct got_repository *repo)
3819 {
3820 	const struct got_error *err;
3821 	struct tog_diff_view_state *s = &view->state.diff;
3822 
3823 	memset(s, 0, sizeof(*s));
3824 
3825 	if (id1 != NULL && id2 != NULL) {
3826 	    int type1, type2;
3827 	    err = got_object_get_type(&type1, repo, id1);
3828 	    if (err)
3829 		return err;
3830 	    err = got_object_get_type(&type2, repo, id2);
3831 	    if (err)
3832 		return err;
3833 
3834 	    if (type1 != type2)
3835 		return got_error(GOT_ERR_OBJ_TYPE);
3836 	}
3837 	s->first_displayed_line = 1;
3838 	s->last_displayed_line = view->nlines;
3839 	s->selected_line = 1;
3840 	s->repo = repo;
3841 	s->id1 = id1;
3842 	s->id2 = id2;
3843 	s->label1 = label1;
3844 	s->label2 = label2;
3845 
3846 	if (id1) {
3847 		s->id1 = got_object_id_dup(id1);
3848 		if (s->id1 == NULL)
3849 			return got_error_from_errno("got_object_id_dup");
3850 	} else
3851 		s->id1 = NULL;
3852 
3853 	s->id2 = got_object_id_dup(id2);
3854 	if (s->id2 == NULL) {
3855 		err = got_error_from_errno("got_object_id_dup");
3856 		goto done;
3857 	}
3858 
3859 	s->f1 = got_opentemp();
3860 	if (s->f1 == NULL) {
3861 		err = got_error_from_errno("got_opentemp");
3862 		goto done;
3863 	}
3864 
3865 	s->f2 = got_opentemp();
3866 	if (s->f2 == NULL) {
3867 		err = got_error_from_errno("got_opentemp");
3868 		goto done;
3869 	}
3870 
3871 	s->first_displayed_line = 1;
3872 	s->last_displayed_line = view->nlines;
3873 	s->diff_context = diff_context;
3874 	s->ignore_whitespace = ignore_whitespace;
3875 	s->force_text_diff = force_text_diff;
3876 	s->log_view = log_view;
3877 	s->repo = repo;
3878 
3879 	STAILQ_INIT(&s->colors);
3880 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3881 		err = add_color(&s->colors,
3882 		    "^-", TOG_COLOR_DIFF_MINUS,
3883 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3884 		if (err)
3885 			goto done;
3886 		err = add_color(&s->colors, "^\\+",
3887 		    TOG_COLOR_DIFF_PLUS,
3888 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3889 		if (err)
3890 			goto done;
3891 		err = add_color(&s->colors,
3892 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3893 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3894 		if (err)
3895 			goto done;
3896 
3897 		err = add_color(&s->colors,
3898 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3899 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3900 		    get_color_value("TOG_COLOR_DIFF_META"));
3901 		if (err)
3902 			goto done;
3903 
3904 		err = add_color(&s->colors,
3905 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3906 		    get_color_value("TOG_COLOR_AUTHOR"));
3907 		if (err)
3908 			goto done;
3909 
3910 		err = add_color(&s->colors,
3911 		    "^date: ", TOG_COLOR_DATE,
3912 		    get_color_value("TOG_COLOR_DATE"));
3913 		if (err)
3914 			goto done;
3915 	}
3916 
3917 	if (log_view && view_is_splitscreen(view))
3918 		show_log_view(log_view); /* draw vborder */
3919 	diff_view_indicate_progress(view);
3920 
3921 	err = create_diff(s);
3922 
3923 	view->show = show_diff_view;
3924 	view->input = input_diff_view;
3925 	view->close = close_diff_view;
3926 	view->search_start = search_start_diff_view;
3927 	view->search_next = search_next_diff_view;
3928 done:
3929 	if (err)
3930 		close_diff_view(view);
3931 	return err;
3932 }
3933 
3934 static const struct got_error *
3935 show_diff_view(struct tog_view *view)
3936 {
3937 	const struct got_error *err;
3938 	struct tog_diff_view_state *s = &view->state.diff;
3939 	char *id_str1 = NULL, *id_str2, *header;
3940 	const char *label1, *label2;
3941 
3942 	if (s->id1) {
3943 		err = got_object_id_str(&id_str1, s->id1);
3944 		if (err)
3945 			return err;
3946 		label1 = s->label1 ? : id_str1;
3947 	} else
3948 		label1 = "/dev/null";
3949 
3950 	err = got_object_id_str(&id_str2, s->id2);
3951 	if (err)
3952 		return err;
3953 	label2 = s->label2 ? : id_str2;
3954 
3955 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3956 		err = got_error_from_errno("asprintf");
3957 		free(id_str1);
3958 		free(id_str2);
3959 		return err;
3960 	}
3961 	free(id_str1);
3962 	free(id_str2);
3963 
3964 	err = draw_file(view, header);
3965 	free(header);
3966 	return err;
3967 }
3968 
3969 static const struct got_error *
3970 set_selected_commit(struct tog_diff_view_state *s,
3971     struct commit_queue_entry *entry)
3972 {
3973 	const struct got_error *err;
3974 	const struct got_object_id_queue *parent_ids;
3975 	struct got_commit_object *selected_commit;
3976 	struct got_object_qid *pid;
3977 
3978 	free(s->id2);
3979 	s->id2 = got_object_id_dup(entry->id);
3980 	if (s->id2 == NULL)
3981 		return got_error_from_errno("got_object_id_dup");
3982 
3983 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3984 	if (err)
3985 		return err;
3986 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3987 	free(s->id1);
3988 	pid = STAILQ_FIRST(parent_ids);
3989 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3990 	got_object_commit_close(selected_commit);
3991 	return NULL;
3992 }
3993 
3994 static const struct got_error *
3995 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3996 {
3997 	const struct got_error *err = NULL;
3998 	struct tog_diff_view_state *s = &view->state.diff;
3999 	struct tog_log_view_state *ls;
4000 	struct commit_queue_entry *old_selected_entry;
4001 	char *line = NULL;
4002 	size_t linesize = 0;
4003 	ssize_t linelen;
4004 	int i, nscroll = view->nlines - 1;
4005 
4006 	switch (ch) {
4007 	case '0':
4008 		view->x = 0;
4009 		break;
4010 	case '$':
4011 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4012 		break;
4013 	case KEY_RIGHT:
4014 	case 'l':
4015 		if (view->x + view->ncols / 3 < view->maxx)
4016 			view->x += 2;  /* move two columns right */
4017 		break;
4018 	case KEY_LEFT:
4019 	case 'h':
4020 		view->x -= MIN(view->x, 2);  /* move two columns back */
4021 		break;
4022 	case 'a':
4023 	case 'w':
4024 		if (ch == 'a')
4025 			s->force_text_diff = !s->force_text_diff;
4026 		if (ch == 'w')
4027 			s->ignore_whitespace = !s->ignore_whitespace;
4028 		wclear(view->window);
4029 		s->first_displayed_line = 1;
4030 		s->last_displayed_line = view->nlines;
4031 		s->matched_line = 0;
4032 		diff_view_indicate_progress(view);
4033 		err = create_diff(s);
4034 		break;
4035 	case 'g':
4036 	case KEY_HOME:
4037 		s->first_displayed_line = 1;
4038 		break;
4039 	case 'G':
4040 	case KEY_END:
4041 		if (s->eof)
4042 			break;
4043 
4044 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4045 		s->eof = 1;
4046 		break;
4047 	case 'k':
4048 	case KEY_UP:
4049 	case CTRL('p'):
4050 		if (s->first_displayed_line > 1)
4051 			s->first_displayed_line--;
4052 		break;
4053 	case CTRL('u'):
4054 	case 'u':
4055 		nscroll /= 2;
4056 		/* FALL THROUGH */
4057 	case KEY_PPAGE:
4058 	case CTRL('b'):
4059 		if (s->first_displayed_line == 1)
4060 			break;
4061 		i = 0;
4062 		while (i++ < nscroll && s->first_displayed_line > 1)
4063 			s->first_displayed_line--;
4064 		break;
4065 	case 'j':
4066 	case KEY_DOWN:
4067 	case CTRL('n'):
4068 		if (!s->eof)
4069 			s->first_displayed_line++;
4070 		break;
4071 	case CTRL('d'):
4072 	case 'd':
4073 		nscroll /= 2;
4074 		/* FALL THROUGH */
4075 	case KEY_NPAGE:
4076 	case CTRL('f'):
4077 	case ' ':
4078 		if (s->eof)
4079 			break;
4080 		i = 0;
4081 		while (!s->eof && i++ < nscroll) {
4082 			linelen = getline(&line, &linesize, s->f);
4083 			s->first_displayed_line++;
4084 			if (linelen == -1) {
4085 				if (feof(s->f)) {
4086 					s->eof = 1;
4087 				} else
4088 					err = got_ferror(s->f, GOT_ERR_IO);
4089 				break;
4090 			}
4091 		}
4092 		free(line);
4093 		break;
4094 	case '[':
4095 		if (s->diff_context > 0) {
4096 			s->diff_context--;
4097 			s->matched_line = 0;
4098 			diff_view_indicate_progress(view);
4099 			err = create_diff(s);
4100 			if (s->first_displayed_line + view->nlines - 1 >
4101 			    s->nlines) {
4102 				s->first_displayed_line = 1;
4103 				s->last_displayed_line = view->nlines;
4104 			}
4105 		}
4106 		break;
4107 	case ']':
4108 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4109 			s->diff_context++;
4110 			s->matched_line = 0;
4111 			diff_view_indicate_progress(view);
4112 			err = create_diff(s);
4113 		}
4114 		break;
4115 	case '<':
4116 	case ',':
4117 		if (s->log_view == NULL)
4118 			break;
4119 		ls = &s->log_view->state.log;
4120 		old_selected_entry = ls->selected_entry;
4121 
4122 		err = input_log_view(NULL, s->log_view, KEY_UP);
4123 		if (err)
4124 			break;
4125 
4126 		if (old_selected_entry == ls->selected_entry)
4127 			break;
4128 
4129 		err = set_selected_commit(s, ls->selected_entry);
4130 		if (err)
4131 			break;
4132 
4133 		s->first_displayed_line = 1;
4134 		s->last_displayed_line = view->nlines;
4135 		s->matched_line = 0;
4136 		view->x = 0;
4137 
4138 		diff_view_indicate_progress(view);
4139 		err = create_diff(s);
4140 		break;
4141 	case '>':
4142 	case '.':
4143 		if (s->log_view == NULL)
4144 			break;
4145 		ls = &s->log_view->state.log;
4146 		old_selected_entry = ls->selected_entry;
4147 
4148 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4149 		if (err)
4150 			break;
4151 
4152 		if (old_selected_entry == ls->selected_entry)
4153 			break;
4154 
4155 		err = set_selected_commit(s, ls->selected_entry);
4156 		if (err)
4157 			break;
4158 
4159 		s->first_displayed_line = 1;
4160 		s->last_displayed_line = view->nlines;
4161 		s->matched_line = 0;
4162 		view->x = 0;
4163 
4164 		diff_view_indicate_progress(view);
4165 		err = create_diff(s);
4166 		break;
4167 	default:
4168 		break;
4169 	}
4170 
4171 	return err;
4172 }
4173 
4174 static const struct got_error *
4175 cmd_diff(int argc, char *argv[])
4176 {
4177 	const struct got_error *error = NULL;
4178 	struct got_repository *repo = NULL;
4179 	struct got_worktree *worktree = NULL;
4180 	struct got_object_id *id1 = NULL, *id2 = NULL;
4181 	char *repo_path = NULL, *cwd = NULL;
4182 	char *id_str1 = NULL, *id_str2 = NULL;
4183 	char *label1 = NULL, *label2 = NULL;
4184 	int diff_context = 3, ignore_whitespace = 0;
4185 	int ch, force_text_diff = 0;
4186 	const char *errstr;
4187 	struct tog_view *view;
4188 	int *pack_fds = NULL;
4189 
4190 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4191 		switch (ch) {
4192 		case 'a':
4193 			force_text_diff = 1;
4194 			break;
4195 		case 'C':
4196 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4197 			    &errstr);
4198 			if (errstr != NULL)
4199 				errx(1, "number of context lines is %s: %s",
4200 				    errstr, errstr);
4201 			break;
4202 		case 'r':
4203 			repo_path = realpath(optarg, NULL);
4204 			if (repo_path == NULL)
4205 				return got_error_from_errno2("realpath",
4206 				    optarg);
4207 			got_path_strip_trailing_slashes(repo_path);
4208 			break;
4209 		case 'w':
4210 			ignore_whitespace = 1;
4211 			break;
4212 		default:
4213 			usage_diff();
4214 			/* NOTREACHED */
4215 		}
4216 	}
4217 
4218 	argc -= optind;
4219 	argv += optind;
4220 
4221 	if (argc == 0) {
4222 		usage_diff(); /* TODO show local worktree changes */
4223 	} else if (argc == 2) {
4224 		id_str1 = argv[0];
4225 		id_str2 = argv[1];
4226 	} else
4227 		usage_diff();
4228 
4229 	error = got_repo_pack_fds_open(&pack_fds);
4230 	if (error)
4231 		goto done;
4232 
4233 	if (repo_path == NULL) {
4234 		cwd = getcwd(NULL, 0);
4235 		if (cwd == NULL)
4236 			return got_error_from_errno("getcwd");
4237 		error = got_worktree_open(&worktree, cwd);
4238 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4239 			goto done;
4240 		if (worktree)
4241 			repo_path =
4242 			    strdup(got_worktree_get_repo_path(worktree));
4243 		else
4244 			repo_path = strdup(cwd);
4245 		if (repo_path == NULL) {
4246 			error = got_error_from_errno("strdup");
4247 			goto done;
4248 		}
4249 	}
4250 
4251 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4252 	if (error)
4253 		goto done;
4254 
4255 	init_curses();
4256 
4257 	error = apply_unveil(got_repo_get_path(repo), NULL);
4258 	if (error)
4259 		goto done;
4260 
4261 	error = tog_load_refs(repo, 0);
4262 	if (error)
4263 		goto done;
4264 
4265 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4266 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4267 	if (error)
4268 		goto done;
4269 
4270 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4271 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4272 	if (error)
4273 		goto done;
4274 
4275 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4276 	if (view == NULL) {
4277 		error = got_error_from_errno("view_open");
4278 		goto done;
4279 	}
4280 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4281 	    ignore_whitespace, force_text_diff, NULL,  repo);
4282 	if (error)
4283 		goto done;
4284 	error = view_loop(view);
4285 done:
4286 	free(label1);
4287 	free(label2);
4288 	free(repo_path);
4289 	free(cwd);
4290 	if (repo) {
4291 		const struct got_error *close_err = got_repo_close(repo);
4292 		if (error == NULL)
4293 			error = close_err;
4294 	}
4295 	if (worktree)
4296 		got_worktree_close(worktree);
4297 	if (pack_fds) {
4298 		const struct got_error *pack_err =
4299 		    got_repo_pack_fds_close(pack_fds);
4300 		if (error == NULL)
4301 			error = pack_err;
4302 	}
4303 	tog_free_refs();
4304 	return error;
4305 }
4306 
4307 __dead static void
4308 usage_blame(void)
4309 {
4310 	endwin();
4311 	fprintf(stderr,
4312 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4313 	    getprogname());
4314 	exit(1);
4315 }
4316 
4317 struct tog_blame_line {
4318 	int annotated;
4319 	struct got_object_id *id;
4320 };
4321 
4322 static const struct got_error *
4323 draw_blame(struct tog_view *view)
4324 {
4325 	struct tog_blame_view_state *s = &view->state.blame;
4326 	struct tog_blame *blame = &s->blame;
4327 	regmatch_t *regmatch = &view->regmatch;
4328 	const struct got_error *err;
4329 	int lineno = 0, nprinted = 0;
4330 	char *line = NULL;
4331 	size_t linesize = 0;
4332 	ssize_t linelen;
4333 	wchar_t *wline;
4334 	int width;
4335 	struct tog_blame_line *blame_line;
4336 	struct got_object_id *prev_id = NULL;
4337 	char *id_str;
4338 	struct tog_color *tc;
4339 
4340 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4341 	if (err)
4342 		return err;
4343 
4344 	rewind(blame->f);
4345 	werase(view->window);
4346 
4347 	if (asprintf(&line, "commit %s", id_str) == -1) {
4348 		err = got_error_from_errno("asprintf");
4349 		free(id_str);
4350 		return err;
4351 	}
4352 
4353 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4354 	free(line);
4355 	line = NULL;
4356 	if (err)
4357 		return err;
4358 	if (view_needs_focus_indication(view))
4359 		wstandout(view->window);
4360 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4361 	if (tc)
4362 		wattr_on(view->window,
4363 		    COLOR_PAIR(tc->colorpair), NULL);
4364 	waddwstr(view->window, wline);
4365 	if (tc)
4366 		wattr_off(view->window,
4367 		    COLOR_PAIR(tc->colorpair), NULL);
4368 	if (view_needs_focus_indication(view))
4369 		wstandend(view->window);
4370 	free(wline);
4371 	wline = NULL;
4372 	if (width < view->ncols - 1)
4373 		waddch(view->window, '\n');
4374 
4375 	if (asprintf(&line, "[%d/%d] %s%s",
4376 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4377 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4378 		free(id_str);
4379 		return got_error_from_errno("asprintf");
4380 	}
4381 	free(id_str);
4382 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4383 	free(line);
4384 	line = NULL;
4385 	if (err)
4386 		return err;
4387 	waddwstr(view->window, wline);
4388 	free(wline);
4389 	wline = NULL;
4390 	if (width < view->ncols - 1)
4391 		waddch(view->window, '\n');
4392 
4393 	s->eof = 0;
4394 	view->maxx = 0;
4395 	while (nprinted < view->nlines - 2) {
4396 		linelen = getline(&line, &linesize, blame->f);
4397 		if (linelen == -1) {
4398 			if (feof(blame->f)) {
4399 				s->eof = 1;
4400 				break;
4401 			}
4402 			free(line);
4403 			return got_ferror(blame->f, GOT_ERR_IO);
4404 		}
4405 		if (++lineno < s->first_displayed_line)
4406 			continue;
4407 
4408 		/* Set view->maxx based on full line length. */
4409 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4410 		if (err) {
4411 			free(line);
4412 			return err;
4413 		}
4414 		free(wline);
4415 		wline = NULL;
4416 		view->maxx = MAX(view->maxx, width);
4417 
4418 		if (view->focussed && nprinted == s->selected_line - 1)
4419 			wstandout(view->window);
4420 
4421 		if (blame->nlines > 0) {
4422 			blame_line = &blame->lines[lineno - 1];
4423 			if (blame_line->annotated && prev_id &&
4424 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4425 			    !(view->focussed &&
4426 			    nprinted == s->selected_line - 1)) {
4427 				waddstr(view->window, "        ");
4428 			} else if (blame_line->annotated) {
4429 				char *id_str;
4430 				err = got_object_id_str(&id_str,
4431 				    blame_line->id);
4432 				if (err) {
4433 					free(line);
4434 					return err;
4435 				}
4436 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4437 				if (tc)
4438 					wattr_on(view->window,
4439 					    COLOR_PAIR(tc->colorpair), NULL);
4440 				wprintw(view->window, "%.8s", id_str);
4441 				if (tc)
4442 					wattr_off(view->window,
4443 					    COLOR_PAIR(tc->colorpair), NULL);
4444 				free(id_str);
4445 				prev_id = blame_line->id;
4446 			} else {
4447 				waddstr(view->window, "........");
4448 				prev_id = NULL;
4449 			}
4450 		} else {
4451 			waddstr(view->window, "........");
4452 			prev_id = NULL;
4453 		}
4454 
4455 		if (view->focussed && nprinted == s->selected_line - 1)
4456 			wstandend(view->window);
4457 		waddstr(view->window, " ");
4458 
4459 		if (view->ncols <= 9) {
4460 			width = 9;
4461 		} else if (s->first_displayed_line + nprinted ==
4462 		    s->matched_line &&
4463 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4464 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4465 			    view->window, view->x, regmatch);
4466 			if (err) {
4467 				free(line);
4468 				return err;
4469 			}
4470 			width += 9;
4471 		} else {
4472 			int skip;
4473 			err = format_line(&wline, &width, &skip, line,
4474 			    view->x, view->ncols - 9, 9, 1);
4475 			if (err) {
4476 				free(line);
4477 				return err;
4478 			}
4479 			waddwstr(view->window, &wline[skip]);
4480 			width += 9;
4481 			free(wline);
4482 			wline = NULL;
4483 		}
4484 
4485 		if (width <= view->ncols - 1)
4486 			waddch(view->window, '\n');
4487 		if (++nprinted == 1)
4488 			s->first_displayed_line = lineno;
4489 	}
4490 	free(line);
4491 	s->last_displayed_line = lineno;
4492 
4493 	view_vborder(view);
4494 
4495 	return NULL;
4496 }
4497 
4498 static const struct got_error *
4499 blame_cb(void *arg, int nlines, int lineno,
4500     struct got_commit_object *commit, struct got_object_id *id)
4501 {
4502 	const struct got_error *err = NULL;
4503 	struct tog_blame_cb_args *a = arg;
4504 	struct tog_blame_line *line;
4505 	int errcode;
4506 
4507 	if (nlines != a->nlines ||
4508 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4509 		return got_error(GOT_ERR_RANGE);
4510 
4511 	errcode = pthread_mutex_lock(&tog_mutex);
4512 	if (errcode)
4513 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4514 
4515 	if (*a->quit) {	/* user has quit the blame view */
4516 		err = got_error(GOT_ERR_ITER_COMPLETED);
4517 		goto done;
4518 	}
4519 
4520 	if (lineno == -1)
4521 		goto done; /* no change in this commit */
4522 
4523 	line = &a->lines[lineno - 1];
4524 	if (line->annotated)
4525 		goto done;
4526 
4527 	line->id = got_object_id_dup(id);
4528 	if (line->id == NULL) {
4529 		err = got_error_from_errno("got_object_id_dup");
4530 		goto done;
4531 	}
4532 	line->annotated = 1;
4533 done:
4534 	errcode = pthread_mutex_unlock(&tog_mutex);
4535 	if (errcode)
4536 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4537 	return err;
4538 }
4539 
4540 static void *
4541 blame_thread(void *arg)
4542 {
4543 	const struct got_error *err, *close_err;
4544 	struct tog_blame_thread_args *ta = arg;
4545 	struct tog_blame_cb_args *a = ta->cb_args;
4546 	int errcode;
4547 
4548 	err = block_signals_used_by_main_thread();
4549 	if (err)
4550 		return (void *)err;
4551 
4552 	err = got_blame(ta->path, a->commit_id, ta->repo,
4553 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4554 	if (err && err->code == GOT_ERR_CANCELLED)
4555 		err = NULL;
4556 
4557 	errcode = pthread_mutex_lock(&tog_mutex);
4558 	if (errcode)
4559 		return (void *)got_error_set_errno(errcode,
4560 		    "pthread_mutex_lock");
4561 
4562 	close_err = got_repo_close(ta->repo);
4563 	if (err == NULL)
4564 		err = close_err;
4565 	ta->repo = NULL;
4566 	*ta->complete = 1;
4567 
4568 	errcode = pthread_mutex_unlock(&tog_mutex);
4569 	if (errcode && err == NULL)
4570 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4571 
4572 	return (void *)err;
4573 }
4574 
4575 static struct got_object_id *
4576 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4577     int first_displayed_line, int selected_line)
4578 {
4579 	struct tog_blame_line *line;
4580 
4581 	if (nlines <= 0)
4582 		return NULL;
4583 
4584 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4585 	if (!line->annotated)
4586 		return NULL;
4587 
4588 	return line->id;
4589 }
4590 
4591 static const struct got_error *
4592 stop_blame(struct tog_blame *blame)
4593 {
4594 	const struct got_error *err = NULL;
4595 	int i;
4596 
4597 	if (blame->thread) {
4598 		int errcode;
4599 		errcode = pthread_mutex_unlock(&tog_mutex);
4600 		if (errcode)
4601 			return got_error_set_errno(errcode,
4602 			    "pthread_mutex_unlock");
4603 		errcode = pthread_join(blame->thread, (void **)&err);
4604 		if (errcode)
4605 			return got_error_set_errno(errcode, "pthread_join");
4606 		errcode = pthread_mutex_lock(&tog_mutex);
4607 		if (errcode)
4608 			return got_error_set_errno(errcode,
4609 			    "pthread_mutex_lock");
4610 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4611 			err = NULL;
4612 		blame->thread = NULL;
4613 	}
4614 	if (blame->thread_args.repo) {
4615 		const struct got_error *close_err;
4616 		close_err = got_repo_close(blame->thread_args.repo);
4617 		if (err == NULL)
4618 			err = close_err;
4619 		blame->thread_args.repo = NULL;
4620 	}
4621 	if (blame->f) {
4622 		if (fclose(blame->f) == EOF && err == NULL)
4623 			err = got_error_from_errno("fclose");
4624 		blame->f = NULL;
4625 	}
4626 	if (blame->lines) {
4627 		for (i = 0; i < blame->nlines; i++)
4628 			free(blame->lines[i].id);
4629 		free(blame->lines);
4630 		blame->lines = NULL;
4631 	}
4632 	free(blame->cb_args.commit_id);
4633 	blame->cb_args.commit_id = NULL;
4634 	if (blame->pack_fds) {
4635 		const struct got_error *pack_err =
4636 		    got_repo_pack_fds_close(blame->pack_fds);
4637 		if (err == NULL)
4638 			err = pack_err;
4639 		blame->pack_fds = NULL;
4640 	}
4641 	return err;
4642 }
4643 
4644 static const struct got_error *
4645 cancel_blame_view(void *arg)
4646 {
4647 	const struct got_error *err = NULL;
4648 	int *done = arg;
4649 	int errcode;
4650 
4651 	errcode = pthread_mutex_lock(&tog_mutex);
4652 	if (errcode)
4653 		return got_error_set_errno(errcode,
4654 		    "pthread_mutex_unlock");
4655 
4656 	if (*done)
4657 		err = got_error(GOT_ERR_CANCELLED);
4658 
4659 	errcode = pthread_mutex_unlock(&tog_mutex);
4660 	if (errcode)
4661 		return got_error_set_errno(errcode,
4662 		    "pthread_mutex_lock");
4663 
4664 	return err;
4665 }
4666 
4667 static const struct got_error *
4668 run_blame(struct tog_view *view)
4669 {
4670 	struct tog_blame_view_state *s = &view->state.blame;
4671 	struct tog_blame *blame = &s->blame;
4672 	const struct got_error *err = NULL;
4673 	struct got_commit_object *commit = NULL;
4674 	struct got_blob_object *blob = NULL;
4675 	struct got_repository *thread_repo = NULL;
4676 	struct got_object_id *obj_id = NULL;
4677 	int obj_type;
4678 	int *pack_fds = NULL;
4679 
4680 	err = got_object_open_as_commit(&commit, s->repo,
4681 	    &s->blamed_commit->id);
4682 	if (err)
4683 		return err;
4684 
4685 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4686 	if (err)
4687 		goto done;
4688 
4689 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4690 	if (err)
4691 		goto done;
4692 
4693 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4694 		err = got_error(GOT_ERR_OBJ_TYPE);
4695 		goto done;
4696 	}
4697 
4698 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4699 	if (err)
4700 		goto done;
4701 	blame->f = got_opentemp();
4702 	if (blame->f == NULL) {
4703 		err = got_error_from_errno("got_opentemp");
4704 		goto done;
4705 	}
4706 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4707 	    &blame->line_offsets, blame->f, blob);
4708 	if (err)
4709 		goto done;
4710 	if (blame->nlines == 0) {
4711 		s->blame_complete = 1;
4712 		goto done;
4713 	}
4714 
4715 	/* Don't include \n at EOF in the blame line count. */
4716 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4717 		blame->nlines--;
4718 
4719 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4720 	if (blame->lines == NULL) {
4721 		err = got_error_from_errno("calloc");
4722 		goto done;
4723 	}
4724 
4725 	err = got_repo_pack_fds_open(&pack_fds);
4726 	if (err)
4727 		goto done;
4728 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4729 	    pack_fds);
4730 	if (err)
4731 		goto done;
4732 
4733 	blame->pack_fds = pack_fds;
4734 	blame->cb_args.view = view;
4735 	blame->cb_args.lines = blame->lines;
4736 	blame->cb_args.nlines = blame->nlines;
4737 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4738 	if (blame->cb_args.commit_id == NULL) {
4739 		err = got_error_from_errno("got_object_id_dup");
4740 		goto done;
4741 	}
4742 	blame->cb_args.quit = &s->done;
4743 
4744 	blame->thread_args.path = s->path;
4745 	blame->thread_args.repo = thread_repo;
4746 	blame->thread_args.cb_args = &blame->cb_args;
4747 	blame->thread_args.complete = &s->blame_complete;
4748 	blame->thread_args.cancel_cb = cancel_blame_view;
4749 	blame->thread_args.cancel_arg = &s->done;
4750 	s->blame_complete = 0;
4751 
4752 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4753 		s->first_displayed_line = 1;
4754 		s->last_displayed_line = view->nlines;
4755 		s->selected_line = 1;
4756 	}
4757 	s->matched_line = 0;
4758 
4759 done:
4760 	if (commit)
4761 		got_object_commit_close(commit);
4762 	if (blob)
4763 		got_object_blob_close(blob);
4764 	free(obj_id);
4765 	if (err)
4766 		stop_blame(blame);
4767 	return err;
4768 }
4769 
4770 static const struct got_error *
4771 open_blame_view(struct tog_view *view, char *path,
4772     struct got_object_id *commit_id, struct got_repository *repo)
4773 {
4774 	const struct got_error *err = NULL;
4775 	struct tog_blame_view_state *s = &view->state.blame;
4776 
4777 	STAILQ_INIT(&s->blamed_commits);
4778 
4779 	s->path = strdup(path);
4780 	if (s->path == NULL)
4781 		return got_error_from_errno("strdup");
4782 
4783 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4784 	if (err) {
4785 		free(s->path);
4786 		return err;
4787 	}
4788 
4789 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4790 	s->first_displayed_line = 1;
4791 	s->last_displayed_line = view->nlines;
4792 	s->selected_line = 1;
4793 	s->blame_complete = 0;
4794 	s->repo = repo;
4795 	s->commit_id = commit_id;
4796 	memset(&s->blame, 0, sizeof(s->blame));
4797 
4798 	STAILQ_INIT(&s->colors);
4799 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4800 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4801 		    get_color_value("TOG_COLOR_COMMIT"));
4802 		if (err)
4803 			return err;
4804 	}
4805 
4806 	view->show = show_blame_view;
4807 	view->input = input_blame_view;
4808 	view->close = close_blame_view;
4809 	view->search_start = search_start_blame_view;
4810 	view->search_next = search_next_blame_view;
4811 
4812 	return run_blame(view);
4813 }
4814 
4815 static const struct got_error *
4816 close_blame_view(struct tog_view *view)
4817 {
4818 	const struct got_error *err = NULL;
4819 	struct tog_blame_view_state *s = &view->state.blame;
4820 
4821 	if (s->blame.thread)
4822 		err = stop_blame(&s->blame);
4823 
4824 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4825 		struct got_object_qid *blamed_commit;
4826 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4827 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4828 		got_object_qid_free(blamed_commit);
4829 	}
4830 
4831 	free(s->path);
4832 	free_colors(&s->colors);
4833 	return err;
4834 }
4835 
4836 static const struct got_error *
4837 search_start_blame_view(struct tog_view *view)
4838 {
4839 	struct tog_blame_view_state *s = &view->state.blame;
4840 
4841 	s->matched_line = 0;
4842 	return NULL;
4843 }
4844 
4845 static const struct got_error *
4846 search_next_blame_view(struct tog_view *view)
4847 {
4848 	struct tog_blame_view_state *s = &view->state.blame;
4849 	const struct got_error *err = NULL;
4850 	int lineno;
4851 	char *line = NULL;
4852 	size_t linesize = 0;
4853 	ssize_t linelen;
4854 
4855 	if (!view->searching) {
4856 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4857 		return NULL;
4858 	}
4859 
4860 	if (s->matched_line) {
4861 		if (view->searching == TOG_SEARCH_FORWARD)
4862 			lineno = s->matched_line + 1;
4863 		else
4864 			lineno = s->matched_line - 1;
4865 	} else
4866 		lineno = s->first_displayed_line - 1 + s->selected_line;
4867 
4868 	while (1) {
4869 		off_t offset;
4870 
4871 		if (lineno <= 0 || lineno > s->blame.nlines) {
4872 			if (s->matched_line == 0) {
4873 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4874 				break;
4875 			}
4876 
4877 			if (view->searching == TOG_SEARCH_FORWARD)
4878 				lineno = 1;
4879 			else
4880 				lineno = s->blame.nlines;
4881 		}
4882 
4883 		offset = s->blame.line_offsets[lineno - 1];
4884 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4885 			free(line);
4886 			return got_error_from_errno("fseeko");
4887 		}
4888 		linelen = getline(&line, &linesize, s->blame.f);
4889 		if (linelen != -1) {
4890 			char *exstr;
4891 			err = expand_tab(&exstr, line);
4892 			if (err)
4893 				break;
4894 			if (match_line(exstr, &view->regex, 1,
4895 			    &view->regmatch)) {
4896 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4897 				s->matched_line = lineno;
4898 				free(exstr);
4899 				break;
4900 			}
4901 			free(exstr);
4902 		}
4903 		if (view->searching == TOG_SEARCH_FORWARD)
4904 			lineno++;
4905 		else
4906 			lineno--;
4907 	}
4908 	free(line);
4909 
4910 	if (s->matched_line) {
4911 		s->first_displayed_line = s->matched_line;
4912 		s->selected_line = 1;
4913 	}
4914 
4915 	return err;
4916 }
4917 
4918 static const struct got_error *
4919 show_blame_view(struct tog_view *view)
4920 {
4921 	const struct got_error *err = NULL;
4922 	struct tog_blame_view_state *s = &view->state.blame;
4923 	int errcode;
4924 
4925 	if (s->blame.thread == NULL && !s->blame_complete) {
4926 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4927 		    &s->blame.thread_args);
4928 		if (errcode)
4929 			return got_error_set_errno(errcode, "pthread_create");
4930 
4931 		halfdelay(1); /* fast refresh while annotating  */
4932 	}
4933 
4934 	if (s->blame_complete)
4935 		halfdelay(10); /* disable fast refresh */
4936 
4937 	err = draw_blame(view);
4938 
4939 	view_vborder(view);
4940 	return err;
4941 }
4942 
4943 static const struct got_error *
4944 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4945 {
4946 	const struct got_error *err = NULL, *thread_err = NULL;
4947 	struct tog_view *diff_view;
4948 	struct tog_blame_view_state *s = &view->state.blame;
4949 	int begin_x = 0, nscroll = view->nlines - 2;
4950 
4951 	switch (ch) {
4952 	case '0':
4953 		view->x = 0;
4954 		break;
4955 	case '$':
4956 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4957 		break;
4958 	case KEY_RIGHT:
4959 	case 'l':
4960 		if (view->x + view->ncols / 3 < view->maxx)
4961 			view->x += 2;  /* move two columns right */
4962 		break;
4963 	case KEY_LEFT:
4964 	case 'h':
4965 		view->x -= MIN(view->x, 2);  /* move two columns back */
4966 		break;
4967 	case 'q':
4968 		s->done = 1;
4969 		break;
4970 	case 'g':
4971 	case KEY_HOME:
4972 		s->selected_line = 1;
4973 		s->first_displayed_line = 1;
4974 		break;
4975 	case 'G':
4976 	case KEY_END:
4977 		if (s->blame.nlines < view->nlines - 2) {
4978 			s->selected_line = s->blame.nlines;
4979 			s->first_displayed_line = 1;
4980 		} else {
4981 			s->selected_line = view->nlines - 2;
4982 			s->first_displayed_line = s->blame.nlines -
4983 			    (view->nlines - 3);
4984 		}
4985 		break;
4986 	case 'k':
4987 	case KEY_UP:
4988 	case CTRL('p'):
4989 		if (s->selected_line > 1)
4990 			s->selected_line--;
4991 		else if (s->selected_line == 1 &&
4992 		    s->first_displayed_line > 1)
4993 			s->first_displayed_line--;
4994 		break;
4995 	case CTRL('u'):
4996 	case 'u':
4997 		nscroll /= 2;
4998 		/* FALL THROUGH */
4999 	case KEY_PPAGE:
5000 	case CTRL('b'):
5001 		if (s->first_displayed_line == 1) {
5002 			s->selected_line = MAX(1, s->selected_line - nscroll);
5003 			break;
5004 		}
5005 		if (s->first_displayed_line > nscroll)
5006 			s->first_displayed_line -= nscroll;
5007 		else
5008 			s->first_displayed_line = 1;
5009 		break;
5010 	case 'j':
5011 	case KEY_DOWN:
5012 	case CTRL('n'):
5013 		if (s->selected_line < view->nlines - 2 &&
5014 		    s->first_displayed_line +
5015 		    s->selected_line <= s->blame.nlines)
5016 			s->selected_line++;
5017 		else if (s->last_displayed_line <
5018 		    s->blame.nlines)
5019 			s->first_displayed_line++;
5020 		break;
5021 	case 'b':
5022 	case 'p': {
5023 		struct got_object_id *id = NULL;
5024 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5025 		    s->first_displayed_line, s->selected_line);
5026 		if (id == NULL)
5027 			break;
5028 		if (ch == 'p') {
5029 			struct got_commit_object *commit, *pcommit;
5030 			struct got_object_qid *pid;
5031 			struct got_object_id *blob_id = NULL;
5032 			int obj_type;
5033 			err = got_object_open_as_commit(&commit,
5034 			    s->repo, id);
5035 			if (err)
5036 				break;
5037 			pid = STAILQ_FIRST(
5038 			    got_object_commit_get_parent_ids(commit));
5039 			if (pid == NULL) {
5040 				got_object_commit_close(commit);
5041 				break;
5042 			}
5043 			/* Check if path history ends here. */
5044 			err = got_object_open_as_commit(&pcommit,
5045 			    s->repo, &pid->id);
5046 			if (err)
5047 				break;
5048 			err = got_object_id_by_path(&blob_id, s->repo,
5049 			    pcommit, s->path);
5050 			got_object_commit_close(pcommit);
5051 			if (err) {
5052 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5053 					err = NULL;
5054 				got_object_commit_close(commit);
5055 				break;
5056 			}
5057 			err = got_object_get_type(&obj_type, s->repo,
5058 			    blob_id);
5059 			free(blob_id);
5060 			/* Can't blame non-blob type objects. */
5061 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5062 				got_object_commit_close(commit);
5063 				break;
5064 			}
5065 			err = got_object_qid_alloc(&s->blamed_commit,
5066 			    &pid->id);
5067 			got_object_commit_close(commit);
5068 		} else {
5069 			if (got_object_id_cmp(id,
5070 			    &s->blamed_commit->id) == 0)
5071 				break;
5072 			err = got_object_qid_alloc(&s->blamed_commit,
5073 			    id);
5074 		}
5075 		if (err)
5076 			break;
5077 		s->done = 1;
5078 		thread_err = stop_blame(&s->blame);
5079 		s->done = 0;
5080 		if (thread_err)
5081 			break;
5082 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5083 		    s->blamed_commit, entry);
5084 		err = run_blame(view);
5085 		if (err)
5086 			break;
5087 		break;
5088 	}
5089 	case 'B': {
5090 		struct got_object_qid *first;
5091 		first = STAILQ_FIRST(&s->blamed_commits);
5092 		if (!got_object_id_cmp(&first->id, s->commit_id))
5093 			break;
5094 		s->done = 1;
5095 		thread_err = stop_blame(&s->blame);
5096 		s->done = 0;
5097 		if (thread_err)
5098 			break;
5099 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5100 		got_object_qid_free(s->blamed_commit);
5101 		s->blamed_commit =
5102 		    STAILQ_FIRST(&s->blamed_commits);
5103 		err = run_blame(view);
5104 		if (err)
5105 			break;
5106 		break;
5107 	}
5108 	case KEY_ENTER:
5109 	case '\r': {
5110 		struct got_object_id *id = NULL;
5111 		struct got_object_qid *pid;
5112 		struct got_commit_object *commit = NULL;
5113 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5114 		    s->first_displayed_line, s->selected_line);
5115 		if (id == NULL)
5116 			break;
5117 		err = got_object_open_as_commit(&commit, s->repo, id);
5118 		if (err)
5119 			break;
5120 		pid = STAILQ_FIRST(
5121 		    got_object_commit_get_parent_ids(commit));
5122 		if (view_is_parent_view(view))
5123 		    begin_x = view_split_begin_x(view->begin_x);
5124 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5125 		if (diff_view == NULL) {
5126 			got_object_commit_close(commit);
5127 			err = got_error_from_errno("view_open");
5128 			break;
5129 		}
5130 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5131 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5132 		got_object_commit_close(commit);
5133 		if (err) {
5134 			view_close(diff_view);
5135 			break;
5136 		}
5137 		view->focussed = 0;
5138 		diff_view->focussed = 1;
5139 		if (view_is_parent_view(view)) {
5140 			err = view_close_child(view);
5141 			if (err)
5142 				break;
5143 			err = view_set_child(view, diff_view);
5144 			if (err)
5145 				break;
5146 			view->focus_child = 1;
5147 		} else
5148 			*new_view = diff_view;
5149 		if (err)
5150 			break;
5151 		break;
5152 	}
5153 	case CTRL('d'):
5154 	case 'd':
5155 		nscroll /= 2;
5156 		/* FALL THROUGH */
5157 	case KEY_NPAGE:
5158 	case CTRL('f'):
5159 	case ' ':
5160 		if (s->last_displayed_line >= s->blame.nlines &&
5161 		    s->selected_line >= MIN(s->blame.nlines,
5162 		    view->nlines - 2)) {
5163 			break;
5164 		}
5165 		if (s->last_displayed_line >= s->blame.nlines &&
5166 		    s->selected_line < view->nlines - 2) {
5167 			s->selected_line +=
5168 			    MIN(nscroll, s->last_displayed_line -
5169 			    s->first_displayed_line - s->selected_line + 1);
5170 		}
5171 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5172 			s->first_displayed_line += nscroll;
5173 		else
5174 			s->first_displayed_line =
5175 			    s->blame.nlines - (view->nlines - 3);
5176 		break;
5177 	case KEY_RESIZE:
5178 		if (s->selected_line > view->nlines - 2) {
5179 			s->selected_line = MIN(s->blame.nlines,
5180 			    view->nlines - 2);
5181 		}
5182 		break;
5183 	default:
5184 		break;
5185 	}
5186 	return thread_err ? thread_err : err;
5187 }
5188 
5189 static const struct got_error *
5190 cmd_blame(int argc, char *argv[])
5191 {
5192 	const struct got_error *error;
5193 	struct got_repository *repo = NULL;
5194 	struct got_worktree *worktree = NULL;
5195 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5196 	char *link_target = NULL;
5197 	struct got_object_id *commit_id = NULL;
5198 	struct got_commit_object *commit = NULL;
5199 	char *commit_id_str = NULL;
5200 	int ch;
5201 	struct tog_view *view;
5202 	int *pack_fds = NULL;
5203 
5204 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5205 		switch (ch) {
5206 		case 'c':
5207 			commit_id_str = optarg;
5208 			break;
5209 		case 'r':
5210 			repo_path = realpath(optarg, NULL);
5211 			if (repo_path == NULL)
5212 				return got_error_from_errno2("realpath",
5213 				    optarg);
5214 			break;
5215 		default:
5216 			usage_blame();
5217 			/* NOTREACHED */
5218 		}
5219 	}
5220 
5221 	argc -= optind;
5222 	argv += optind;
5223 
5224 	if (argc != 1)
5225 		usage_blame();
5226 
5227 	error = got_repo_pack_fds_open(&pack_fds);
5228 	if (error != NULL)
5229 		goto done;
5230 
5231 	if (repo_path == NULL) {
5232 		cwd = getcwd(NULL, 0);
5233 		if (cwd == NULL)
5234 			return got_error_from_errno("getcwd");
5235 		error = got_worktree_open(&worktree, cwd);
5236 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5237 			goto done;
5238 		if (worktree)
5239 			repo_path =
5240 			    strdup(got_worktree_get_repo_path(worktree));
5241 		else
5242 			repo_path = strdup(cwd);
5243 		if (repo_path == NULL) {
5244 			error = got_error_from_errno("strdup");
5245 			goto done;
5246 		}
5247 	}
5248 
5249 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5250 	if (error != NULL)
5251 		goto done;
5252 
5253 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5254 	    worktree);
5255 	if (error)
5256 		goto done;
5257 
5258 	init_curses();
5259 
5260 	error = apply_unveil(got_repo_get_path(repo), NULL);
5261 	if (error)
5262 		goto done;
5263 
5264 	error = tog_load_refs(repo, 0);
5265 	if (error)
5266 		goto done;
5267 
5268 	if (commit_id_str == NULL) {
5269 		struct got_reference *head_ref;
5270 		error = got_ref_open(&head_ref, repo, worktree ?
5271 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5272 		if (error != NULL)
5273 			goto done;
5274 		error = got_ref_resolve(&commit_id, repo, head_ref);
5275 		got_ref_close(head_ref);
5276 	} else {
5277 		error = got_repo_match_object_id(&commit_id, NULL,
5278 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5279 	}
5280 	if (error != NULL)
5281 		goto done;
5282 
5283 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5284 	if (view == NULL) {
5285 		error = got_error_from_errno("view_open");
5286 		goto done;
5287 	}
5288 
5289 	error = got_object_open_as_commit(&commit, repo, commit_id);
5290 	if (error)
5291 		goto done;
5292 
5293 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5294 	    commit, repo);
5295 	if (error)
5296 		goto done;
5297 
5298 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5299 	    commit_id, repo);
5300 	if (error)
5301 		goto done;
5302 	if (worktree) {
5303 		/* Release work tree lock. */
5304 		got_worktree_close(worktree);
5305 		worktree = NULL;
5306 	}
5307 	error = view_loop(view);
5308 done:
5309 	free(repo_path);
5310 	free(in_repo_path);
5311 	free(link_target);
5312 	free(cwd);
5313 	free(commit_id);
5314 	if (commit)
5315 		got_object_commit_close(commit);
5316 	if (worktree)
5317 		got_worktree_close(worktree);
5318 	if (repo) {
5319 		const struct got_error *close_err = got_repo_close(repo);
5320 		if (error == NULL)
5321 			error = close_err;
5322 	}
5323 	if (pack_fds) {
5324 		const struct got_error *pack_err =
5325 		    got_repo_pack_fds_close(pack_fds);
5326 		if (error == NULL)
5327 			error = pack_err;
5328 	}
5329 	tog_free_refs();
5330 	return error;
5331 }
5332 
5333 static const struct got_error *
5334 draw_tree_entries(struct tog_view *view, const char *parent_path)
5335 {
5336 	struct tog_tree_view_state *s = &view->state.tree;
5337 	const struct got_error *err = NULL;
5338 	struct got_tree_entry *te;
5339 	wchar_t *wline;
5340 	struct tog_color *tc;
5341 	int width, n, i, nentries;
5342 	int limit = view->nlines;
5343 
5344 	s->ndisplayed = 0;
5345 
5346 	werase(view->window);
5347 
5348 	if (limit == 0)
5349 		return NULL;
5350 
5351 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5352 	    0, 0);
5353 	if (err)
5354 		return err;
5355 	if (view_needs_focus_indication(view))
5356 		wstandout(view->window);
5357 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5358 	if (tc)
5359 		wattr_on(view->window,
5360 		    COLOR_PAIR(tc->colorpair), NULL);
5361 	waddwstr(view->window, wline);
5362 	if (tc)
5363 		wattr_off(view->window,
5364 		    COLOR_PAIR(tc->colorpair), NULL);
5365 	if (view_needs_focus_indication(view))
5366 		wstandend(view->window);
5367 	free(wline);
5368 	wline = NULL;
5369 	if (width < view->ncols - 1)
5370 		waddch(view->window, '\n');
5371 	if (--limit <= 0)
5372 		return NULL;
5373 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5374 	    0, 0);
5375 	if (err)
5376 		return err;
5377 	waddwstr(view->window, wline);
5378 	free(wline);
5379 	wline = NULL;
5380 	if (width < view->ncols - 1)
5381 		waddch(view->window, '\n');
5382 	if (--limit <= 0)
5383 		return NULL;
5384 	waddch(view->window, '\n');
5385 	if (--limit <= 0)
5386 		return NULL;
5387 
5388 	if (s->first_displayed_entry == NULL) {
5389 		te = got_object_tree_get_first_entry(s->tree);
5390 		if (s->selected == 0) {
5391 			if (view->focussed)
5392 				wstandout(view->window);
5393 			s->selected_entry = NULL;
5394 		}
5395 		waddstr(view->window, "  ..\n");	/* parent directory */
5396 		if (s->selected == 0 && view->focussed)
5397 			wstandend(view->window);
5398 		s->ndisplayed++;
5399 		if (--limit <= 0)
5400 			return NULL;
5401 		n = 1;
5402 	} else {
5403 		n = 0;
5404 		te = s->first_displayed_entry;
5405 	}
5406 
5407 	nentries = got_object_tree_get_nentries(s->tree);
5408 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5409 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5410 		const char *modestr = "";
5411 		mode_t mode;
5412 
5413 		te = got_object_tree_get_entry(s->tree, i);
5414 		mode = got_tree_entry_get_mode(te);
5415 
5416 		if (s->show_ids) {
5417 			err = got_object_id_str(&id_str,
5418 			    got_tree_entry_get_id(te));
5419 			if (err)
5420 				return got_error_from_errno(
5421 				    "got_object_id_str");
5422 		}
5423 		if (got_object_tree_entry_is_submodule(te))
5424 			modestr = "$";
5425 		else if (S_ISLNK(mode)) {
5426 			int i;
5427 
5428 			err = got_tree_entry_get_symlink_target(&link_target,
5429 			    te, s->repo);
5430 			if (err) {
5431 				free(id_str);
5432 				return err;
5433 			}
5434 			for (i = 0; i < strlen(link_target); i++) {
5435 				if (!isprint((unsigned char)link_target[i]))
5436 					link_target[i] = '?';
5437 			}
5438 			modestr = "@";
5439 		}
5440 		else if (S_ISDIR(mode))
5441 			modestr = "/";
5442 		else if (mode & S_IXUSR)
5443 			modestr = "*";
5444 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5445 		    got_tree_entry_get_name(te), modestr,
5446 		    link_target ? " -> ": "",
5447 		    link_target ? link_target : "") == -1) {
5448 			free(id_str);
5449 			free(link_target);
5450 			return got_error_from_errno("asprintf");
5451 		}
5452 		free(id_str);
5453 		free(link_target);
5454 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5455 		    0, 0);
5456 		if (err) {
5457 			free(line);
5458 			break;
5459 		}
5460 		if (n == s->selected) {
5461 			if (view->focussed)
5462 				wstandout(view->window);
5463 			s->selected_entry = te;
5464 		}
5465 		tc = match_color(&s->colors, line);
5466 		if (tc)
5467 			wattr_on(view->window,
5468 			    COLOR_PAIR(tc->colorpair), NULL);
5469 		waddwstr(view->window, wline);
5470 		if (tc)
5471 			wattr_off(view->window,
5472 			    COLOR_PAIR(tc->colorpair), NULL);
5473 		if (width < view->ncols - 1)
5474 			waddch(view->window, '\n');
5475 		if (n == s->selected && view->focussed)
5476 			wstandend(view->window);
5477 		free(line);
5478 		free(wline);
5479 		wline = NULL;
5480 		n++;
5481 		s->ndisplayed++;
5482 		s->last_displayed_entry = te;
5483 		if (--limit <= 0)
5484 			break;
5485 	}
5486 
5487 	return err;
5488 }
5489 
5490 static void
5491 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5492 {
5493 	struct got_tree_entry *te;
5494 	int isroot = s->tree == s->root;
5495 	int i = 0;
5496 
5497 	if (s->first_displayed_entry == NULL)
5498 		return;
5499 
5500 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5501 	while (i++ < maxscroll) {
5502 		if (te == NULL) {
5503 			if (!isroot)
5504 				s->first_displayed_entry = NULL;
5505 			break;
5506 		}
5507 		s->first_displayed_entry = te;
5508 		te = got_tree_entry_get_prev(s->tree, te);
5509 	}
5510 }
5511 
5512 static void
5513 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5514 {
5515 	struct got_tree_entry *next, *last;
5516 	int n = 0;
5517 
5518 	if (s->first_displayed_entry)
5519 		next = got_tree_entry_get_next(s->tree,
5520 		    s->first_displayed_entry);
5521 	else
5522 		next = got_object_tree_get_first_entry(s->tree);
5523 
5524 	last = s->last_displayed_entry;
5525 	while (next && last && n++ < maxscroll) {
5526 		last = got_tree_entry_get_next(s->tree, last);
5527 		if (last) {
5528 			s->first_displayed_entry = next;
5529 			next = got_tree_entry_get_next(s->tree, next);
5530 		}
5531 	}
5532 }
5533 
5534 static const struct got_error *
5535 tree_entry_path(char **path, struct tog_parent_trees *parents,
5536     struct got_tree_entry *te)
5537 {
5538 	const struct got_error *err = NULL;
5539 	struct tog_parent_tree *pt;
5540 	size_t len = 2; /* for leading slash and NUL */
5541 
5542 	TAILQ_FOREACH(pt, parents, entry)
5543 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5544 		    + 1 /* slash */;
5545 	if (te)
5546 		len += strlen(got_tree_entry_get_name(te));
5547 
5548 	*path = calloc(1, len);
5549 	if (path == NULL)
5550 		return got_error_from_errno("calloc");
5551 
5552 	(*path)[0] = '/';
5553 	pt = TAILQ_LAST(parents, tog_parent_trees);
5554 	while (pt) {
5555 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5556 		if (strlcat(*path, name, len) >= len) {
5557 			err = got_error(GOT_ERR_NO_SPACE);
5558 			goto done;
5559 		}
5560 		if (strlcat(*path, "/", len) >= len) {
5561 			err = got_error(GOT_ERR_NO_SPACE);
5562 			goto done;
5563 		}
5564 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5565 	}
5566 	if (te) {
5567 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5568 			err = got_error(GOT_ERR_NO_SPACE);
5569 			goto done;
5570 		}
5571 	}
5572 done:
5573 	if (err) {
5574 		free(*path);
5575 		*path = NULL;
5576 	}
5577 	return err;
5578 }
5579 
5580 static const struct got_error *
5581 blame_tree_entry(struct tog_view **new_view, int begin_x,
5582     struct got_tree_entry *te, struct tog_parent_trees *parents,
5583     struct got_object_id *commit_id, struct got_repository *repo)
5584 {
5585 	const struct got_error *err = NULL;
5586 	char *path;
5587 	struct tog_view *blame_view;
5588 
5589 	*new_view = NULL;
5590 
5591 	err = tree_entry_path(&path, parents, te);
5592 	if (err)
5593 		return err;
5594 
5595 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5596 	if (blame_view == NULL) {
5597 		err = got_error_from_errno("view_open");
5598 		goto done;
5599 	}
5600 
5601 	err = open_blame_view(blame_view, path, commit_id, repo);
5602 	if (err) {
5603 		if (err->code == GOT_ERR_CANCELLED)
5604 			err = NULL;
5605 		view_close(blame_view);
5606 	} else
5607 		*new_view = blame_view;
5608 done:
5609 	free(path);
5610 	return err;
5611 }
5612 
5613 static const struct got_error *
5614 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5615     struct tog_tree_view_state *s)
5616 {
5617 	struct tog_view *log_view;
5618 	const struct got_error *err = NULL;
5619 	char *path;
5620 
5621 	*new_view = NULL;
5622 
5623 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5624 	if (log_view == NULL)
5625 		return got_error_from_errno("view_open");
5626 
5627 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5628 	if (err)
5629 		return err;
5630 
5631 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5632 	    path, 0);
5633 	if (err)
5634 		view_close(log_view);
5635 	else
5636 		*new_view = log_view;
5637 	free(path);
5638 	return err;
5639 }
5640 
5641 static const struct got_error *
5642 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5643     const char *head_ref_name, struct got_repository *repo)
5644 {
5645 	const struct got_error *err = NULL;
5646 	char *commit_id_str = NULL;
5647 	struct tog_tree_view_state *s = &view->state.tree;
5648 	struct got_commit_object *commit = NULL;
5649 
5650 	TAILQ_INIT(&s->parents);
5651 	STAILQ_INIT(&s->colors);
5652 
5653 	s->commit_id = got_object_id_dup(commit_id);
5654 	if (s->commit_id == NULL)
5655 		return got_error_from_errno("got_object_id_dup");
5656 
5657 	err = got_object_open_as_commit(&commit, repo, commit_id);
5658 	if (err)
5659 		goto done;
5660 
5661 	/*
5662 	 * The root is opened here and will be closed when the view is closed.
5663 	 * Any visited subtrees and their path-wise parents are opened and
5664 	 * closed on demand.
5665 	 */
5666 	err = got_object_open_as_tree(&s->root, repo,
5667 	    got_object_commit_get_tree_id(commit));
5668 	if (err)
5669 		goto done;
5670 	s->tree = s->root;
5671 
5672 	err = got_object_id_str(&commit_id_str, commit_id);
5673 	if (err != NULL)
5674 		goto done;
5675 
5676 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5677 		err = got_error_from_errno("asprintf");
5678 		goto done;
5679 	}
5680 
5681 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5682 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5683 	if (head_ref_name) {
5684 		s->head_ref_name = strdup(head_ref_name);
5685 		if (s->head_ref_name == NULL) {
5686 			err = got_error_from_errno("strdup");
5687 			goto done;
5688 		}
5689 	}
5690 	s->repo = repo;
5691 
5692 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5693 		err = add_color(&s->colors, "\\$$",
5694 		    TOG_COLOR_TREE_SUBMODULE,
5695 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5696 		if (err)
5697 			goto done;
5698 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5699 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5700 		if (err)
5701 			goto done;
5702 		err = add_color(&s->colors, "/$",
5703 		    TOG_COLOR_TREE_DIRECTORY,
5704 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5705 		if (err)
5706 			goto done;
5707 
5708 		err = add_color(&s->colors, "\\*$",
5709 		    TOG_COLOR_TREE_EXECUTABLE,
5710 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5711 		if (err)
5712 			goto done;
5713 
5714 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5715 		    get_color_value("TOG_COLOR_COMMIT"));
5716 		if (err)
5717 			goto done;
5718 	}
5719 
5720 	view->show = show_tree_view;
5721 	view->input = input_tree_view;
5722 	view->close = close_tree_view;
5723 	view->search_start = search_start_tree_view;
5724 	view->search_next = search_next_tree_view;
5725 done:
5726 	free(commit_id_str);
5727 	if (commit)
5728 		got_object_commit_close(commit);
5729 	if (err)
5730 		close_tree_view(view);
5731 	return err;
5732 }
5733 
5734 static const struct got_error *
5735 close_tree_view(struct tog_view *view)
5736 {
5737 	struct tog_tree_view_state *s = &view->state.tree;
5738 
5739 	free_colors(&s->colors);
5740 	free(s->tree_label);
5741 	s->tree_label = NULL;
5742 	free(s->commit_id);
5743 	s->commit_id = NULL;
5744 	free(s->head_ref_name);
5745 	s->head_ref_name = NULL;
5746 	while (!TAILQ_EMPTY(&s->parents)) {
5747 		struct tog_parent_tree *parent;
5748 		parent = TAILQ_FIRST(&s->parents);
5749 		TAILQ_REMOVE(&s->parents, parent, entry);
5750 		if (parent->tree != s->root)
5751 			got_object_tree_close(parent->tree);
5752 		free(parent);
5753 
5754 	}
5755 	if (s->tree != NULL && s->tree != s->root)
5756 		got_object_tree_close(s->tree);
5757 	if (s->root)
5758 		got_object_tree_close(s->root);
5759 	return NULL;
5760 }
5761 
5762 static const struct got_error *
5763 search_start_tree_view(struct tog_view *view)
5764 {
5765 	struct tog_tree_view_state *s = &view->state.tree;
5766 
5767 	s->matched_entry = NULL;
5768 	return NULL;
5769 }
5770 
5771 static int
5772 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5773 {
5774 	regmatch_t regmatch;
5775 
5776 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5777 	    0) == 0;
5778 }
5779 
5780 static const struct got_error *
5781 search_next_tree_view(struct tog_view *view)
5782 {
5783 	struct tog_tree_view_state *s = &view->state.tree;
5784 	struct got_tree_entry *te = NULL;
5785 
5786 	if (!view->searching) {
5787 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5788 		return NULL;
5789 	}
5790 
5791 	if (s->matched_entry) {
5792 		if (view->searching == TOG_SEARCH_FORWARD) {
5793 			if (s->selected_entry)
5794 				te = got_tree_entry_get_next(s->tree,
5795 				    s->selected_entry);
5796 			else
5797 				te = got_object_tree_get_first_entry(s->tree);
5798 		} else {
5799 			if (s->selected_entry == NULL)
5800 				te = got_object_tree_get_last_entry(s->tree);
5801 			else
5802 				te = got_tree_entry_get_prev(s->tree,
5803 				    s->selected_entry);
5804 		}
5805 	} else {
5806 		if (s->selected_entry)
5807 			te = s->selected_entry;
5808 		else if (view->searching == TOG_SEARCH_FORWARD)
5809 			te = got_object_tree_get_first_entry(s->tree);
5810 		else
5811 			te = got_object_tree_get_last_entry(s->tree);
5812 	}
5813 
5814 	while (1) {
5815 		if (te == NULL) {
5816 			if (s->matched_entry == NULL) {
5817 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5818 				return NULL;
5819 			}
5820 			if (view->searching == TOG_SEARCH_FORWARD)
5821 				te = got_object_tree_get_first_entry(s->tree);
5822 			else
5823 				te = got_object_tree_get_last_entry(s->tree);
5824 		}
5825 
5826 		if (match_tree_entry(te, &view->regex)) {
5827 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5828 			s->matched_entry = te;
5829 			break;
5830 		}
5831 
5832 		if (view->searching == TOG_SEARCH_FORWARD)
5833 			te = got_tree_entry_get_next(s->tree, te);
5834 		else
5835 			te = got_tree_entry_get_prev(s->tree, te);
5836 	}
5837 
5838 	if (s->matched_entry) {
5839 		s->first_displayed_entry = s->matched_entry;
5840 		s->selected = 0;
5841 	}
5842 
5843 	return NULL;
5844 }
5845 
5846 static const struct got_error *
5847 show_tree_view(struct tog_view *view)
5848 {
5849 	const struct got_error *err = NULL;
5850 	struct tog_tree_view_state *s = &view->state.tree;
5851 	char *parent_path;
5852 
5853 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5854 	if (err)
5855 		return err;
5856 
5857 	err = draw_tree_entries(view, parent_path);
5858 	free(parent_path);
5859 
5860 	view_vborder(view);
5861 	return err;
5862 }
5863 
5864 static const struct got_error *
5865 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5866 {
5867 	const struct got_error *err = NULL;
5868 	struct tog_tree_view_state *s = &view->state.tree;
5869 	struct tog_view *log_view, *ref_view;
5870 	struct got_tree_entry *te;
5871 	int begin_x = 0, n, nscroll = view->nlines - 3;
5872 
5873 	switch (ch) {
5874 	case 'i':
5875 		s->show_ids = !s->show_ids;
5876 		break;
5877 	case 'l':
5878 		if (!s->selected_entry)
5879 			break;
5880 		if (view_is_parent_view(view))
5881 			begin_x = view_split_begin_x(view->begin_x);
5882 		err = log_selected_tree_entry(&log_view, begin_x, s);
5883 		view->focussed = 0;
5884 		log_view->focussed = 1;
5885 		if (view_is_parent_view(view)) {
5886 			err = view_close_child(view);
5887 			if (err)
5888 				return err;
5889 			err = view_set_child(view, log_view);
5890 			if (err)
5891 				return err;
5892 			view->focus_child = 1;
5893 		} else
5894 			*new_view = log_view;
5895 		break;
5896 	case 'r':
5897 		if (view_is_parent_view(view))
5898 			begin_x = view_split_begin_x(view->begin_x);
5899 		ref_view = view_open(view->nlines, view->ncols,
5900 		    view->begin_y, begin_x, TOG_VIEW_REF);
5901 		if (ref_view == NULL)
5902 			return got_error_from_errno("view_open");
5903 		err = open_ref_view(ref_view, s->repo);
5904 		if (err) {
5905 			view_close(ref_view);
5906 			return err;
5907 		}
5908 		view->focussed = 0;
5909 		ref_view->focussed = 1;
5910 		if (view_is_parent_view(view)) {
5911 			err = view_close_child(view);
5912 			if (err)
5913 				return err;
5914 			err = view_set_child(view, ref_view);
5915 			if (err)
5916 				return err;
5917 			view->focus_child = 1;
5918 		} else
5919 			*new_view = ref_view;
5920 		break;
5921 	case 'g':
5922 	case KEY_HOME:
5923 		s->selected = 0;
5924 		if (s->tree == s->root)
5925 			s->first_displayed_entry =
5926 			    got_object_tree_get_first_entry(s->tree);
5927 		else
5928 			s->first_displayed_entry = NULL;
5929 		break;
5930 	case 'G':
5931 	case KEY_END:
5932 		s->selected = 0;
5933 		te = got_object_tree_get_last_entry(s->tree);
5934 		for (n = 0; n < view->nlines - 3; n++) {
5935 			if (te == NULL) {
5936 				if(s->tree != s->root) {
5937 					s->first_displayed_entry = NULL;
5938 					n++;
5939 				}
5940 				break;
5941 			}
5942 			s->first_displayed_entry = te;
5943 			te = got_tree_entry_get_prev(s->tree, te);
5944 		}
5945 		if (n > 0)
5946 			s->selected = n - 1;
5947 		break;
5948 	case 'k':
5949 	case KEY_UP:
5950 	case CTRL('p'):
5951 		if (s->selected > 0) {
5952 			s->selected--;
5953 			break;
5954 		}
5955 		tree_scroll_up(s, 1);
5956 		break;
5957 	case CTRL('u'):
5958 	case 'u':
5959 		nscroll /= 2;
5960 		/* FALL THROUGH */
5961 	case KEY_PPAGE:
5962 	case CTRL('b'):
5963 		if (s->tree == s->root) {
5964 			if (got_object_tree_get_first_entry(s->tree) ==
5965 			    s->first_displayed_entry)
5966 				s->selected -= MIN(s->selected, nscroll);
5967 		} else {
5968 			if (s->first_displayed_entry == NULL)
5969 				s->selected -= MIN(s->selected, nscroll);
5970 		}
5971 		tree_scroll_up(s, MAX(0, nscroll));
5972 		break;
5973 	case 'j':
5974 	case KEY_DOWN:
5975 	case CTRL('n'):
5976 		if (s->selected < s->ndisplayed - 1) {
5977 			s->selected++;
5978 			break;
5979 		}
5980 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5981 		    == NULL)
5982 			/* can't scroll any further */
5983 			break;
5984 		tree_scroll_down(s, 1);
5985 		break;
5986 	case CTRL('d'):
5987 	case 'd':
5988 		nscroll /= 2;
5989 		/* FALL THROUGH */
5990 	case KEY_NPAGE:
5991 	case CTRL('f'):
5992 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5993 		    == NULL) {
5994 			/* can't scroll any further; move cursor down */
5995 			if (s->selected < s->ndisplayed - 1)
5996 				s->selected += MIN(nscroll,
5997 				    s->ndisplayed - s->selected - 1);
5998 			break;
5999 		}
6000 		tree_scroll_down(s, nscroll);
6001 		break;
6002 	case KEY_ENTER:
6003 	case '\r':
6004 	case KEY_BACKSPACE:
6005 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
6006 			struct tog_parent_tree *parent;
6007 			/* user selected '..' */
6008 			if (s->tree == s->root)
6009 				break;
6010 			parent = TAILQ_FIRST(&s->parents);
6011 			TAILQ_REMOVE(&s->parents, parent,
6012 			    entry);
6013 			got_object_tree_close(s->tree);
6014 			s->tree = parent->tree;
6015 			s->first_displayed_entry =
6016 			    parent->first_displayed_entry;
6017 			s->selected_entry =
6018 			    parent->selected_entry;
6019 			s->selected = parent->selected;
6020 			free(parent);
6021 		} else if (S_ISDIR(got_tree_entry_get_mode(
6022 		    s->selected_entry))) {
6023 			struct got_tree_object *subtree;
6024 			err = got_object_open_as_tree(&subtree, s->repo,
6025 			    got_tree_entry_get_id(s->selected_entry));
6026 			if (err)
6027 				break;
6028 			err = tree_view_visit_subtree(s, subtree);
6029 			if (err) {
6030 				got_object_tree_close(subtree);
6031 				break;
6032 			}
6033 		} else if (S_ISREG(got_tree_entry_get_mode(
6034 		    s->selected_entry))) {
6035 			struct tog_view *blame_view;
6036 			int begin_x = view_is_parent_view(view) ?
6037 			    view_split_begin_x(view->begin_x) : 0;
6038 
6039 			err = blame_tree_entry(&blame_view, begin_x,
6040 			    s->selected_entry, &s->parents,
6041 			    s->commit_id, s->repo);
6042 			if (err)
6043 				break;
6044 			view->focussed = 0;
6045 			blame_view->focussed = 1;
6046 			if (view_is_parent_view(view)) {
6047 				err = view_close_child(view);
6048 				if (err)
6049 					return err;
6050 				err = view_set_child(view, blame_view);
6051 				if (err)
6052 					return err;
6053 				view->focus_child = 1;
6054 			} else
6055 				*new_view = blame_view;
6056 		}
6057 		break;
6058 	case KEY_RESIZE:
6059 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6060 			s->selected = view->nlines - 4;
6061 		break;
6062 	default:
6063 		break;
6064 	}
6065 
6066 	return err;
6067 }
6068 
6069 __dead static void
6070 usage_tree(void)
6071 {
6072 	endwin();
6073 	fprintf(stderr,
6074 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6075 	    getprogname());
6076 	exit(1);
6077 }
6078 
6079 static const struct got_error *
6080 cmd_tree(int argc, char *argv[])
6081 {
6082 	const struct got_error *error;
6083 	struct got_repository *repo = NULL;
6084 	struct got_worktree *worktree = NULL;
6085 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6086 	struct got_object_id *commit_id = NULL;
6087 	struct got_commit_object *commit = NULL;
6088 	const char *commit_id_arg = NULL;
6089 	char *label = NULL;
6090 	struct got_reference *ref = NULL;
6091 	const char *head_ref_name = NULL;
6092 	int ch;
6093 	struct tog_view *view;
6094 	int *pack_fds = NULL;
6095 
6096 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6097 		switch (ch) {
6098 		case 'c':
6099 			commit_id_arg = optarg;
6100 			break;
6101 		case 'r':
6102 			repo_path = realpath(optarg, NULL);
6103 			if (repo_path == NULL)
6104 				return got_error_from_errno2("realpath",
6105 				    optarg);
6106 			break;
6107 		default:
6108 			usage_tree();
6109 			/* NOTREACHED */
6110 		}
6111 	}
6112 
6113 	argc -= optind;
6114 	argv += optind;
6115 
6116 	if (argc > 1)
6117 		usage_tree();
6118 
6119 	error = got_repo_pack_fds_open(&pack_fds);
6120 	if (error != NULL)
6121 		goto done;
6122 
6123 	if (repo_path == NULL) {
6124 		cwd = getcwd(NULL, 0);
6125 		if (cwd == NULL)
6126 			return got_error_from_errno("getcwd");
6127 		error = got_worktree_open(&worktree, cwd);
6128 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6129 			goto done;
6130 		if (worktree)
6131 			repo_path =
6132 			    strdup(got_worktree_get_repo_path(worktree));
6133 		else
6134 			repo_path = strdup(cwd);
6135 		if (repo_path == NULL) {
6136 			error = got_error_from_errno("strdup");
6137 			goto done;
6138 		}
6139 	}
6140 
6141 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6142 	if (error != NULL)
6143 		goto done;
6144 
6145 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6146 	    repo, worktree);
6147 	if (error)
6148 		goto done;
6149 
6150 	init_curses();
6151 
6152 	error = apply_unveil(got_repo_get_path(repo), NULL);
6153 	if (error)
6154 		goto done;
6155 
6156 	error = tog_load_refs(repo, 0);
6157 	if (error)
6158 		goto done;
6159 
6160 	if (commit_id_arg == NULL) {
6161 		error = got_repo_match_object_id(&commit_id, &label,
6162 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6163 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6164 		if (error)
6165 			goto done;
6166 		head_ref_name = label;
6167 	} else {
6168 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6169 		if (error == NULL)
6170 			head_ref_name = got_ref_get_name(ref);
6171 		else if (error->code != GOT_ERR_NOT_REF)
6172 			goto done;
6173 		error = got_repo_match_object_id(&commit_id, NULL,
6174 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6175 		if (error)
6176 			goto done;
6177 	}
6178 
6179 	error = got_object_open_as_commit(&commit, repo, commit_id);
6180 	if (error)
6181 		goto done;
6182 
6183 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6184 	if (view == NULL) {
6185 		error = got_error_from_errno("view_open");
6186 		goto done;
6187 	}
6188 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6189 	if (error)
6190 		goto done;
6191 	if (!got_path_is_root_dir(in_repo_path)) {
6192 		error = tree_view_walk_path(&view->state.tree, commit,
6193 		    in_repo_path);
6194 		if (error)
6195 			goto done;
6196 	}
6197 
6198 	if (worktree) {
6199 		/* Release work tree lock. */
6200 		got_worktree_close(worktree);
6201 		worktree = NULL;
6202 	}
6203 	error = view_loop(view);
6204 done:
6205 	free(repo_path);
6206 	free(cwd);
6207 	free(commit_id);
6208 	free(label);
6209 	if (ref)
6210 		got_ref_close(ref);
6211 	if (repo) {
6212 		const struct got_error *close_err = got_repo_close(repo);
6213 		if (error == NULL)
6214 			error = close_err;
6215 	}
6216 	if (pack_fds) {
6217 		const struct got_error *pack_err =
6218 		    got_repo_pack_fds_close(pack_fds);
6219 		if (error == NULL)
6220 			error = pack_err;
6221 	}
6222 	tog_free_refs();
6223 	return error;
6224 }
6225 
6226 static const struct got_error *
6227 ref_view_load_refs(struct tog_ref_view_state *s)
6228 {
6229 	struct got_reflist_entry *sre;
6230 	struct tog_reflist_entry *re;
6231 
6232 	s->nrefs = 0;
6233 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6234 		if (strncmp(got_ref_get_name(sre->ref),
6235 		    "refs/got/", 9) == 0 &&
6236 		    strncmp(got_ref_get_name(sre->ref),
6237 		    "refs/got/backup/", 16) != 0)
6238 			continue;
6239 
6240 		re = malloc(sizeof(*re));
6241 		if (re == NULL)
6242 			return got_error_from_errno("malloc");
6243 
6244 		re->ref = got_ref_dup(sre->ref);
6245 		if (re->ref == NULL)
6246 			return got_error_from_errno("got_ref_dup");
6247 		re->idx = s->nrefs++;
6248 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6249 	}
6250 
6251 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6252 	return NULL;
6253 }
6254 
6255 void
6256 ref_view_free_refs(struct tog_ref_view_state *s)
6257 {
6258 	struct tog_reflist_entry *re;
6259 
6260 	while (!TAILQ_EMPTY(&s->refs)) {
6261 		re = TAILQ_FIRST(&s->refs);
6262 		TAILQ_REMOVE(&s->refs, re, entry);
6263 		got_ref_close(re->ref);
6264 		free(re);
6265 	}
6266 }
6267 
6268 static const struct got_error *
6269 open_ref_view(struct tog_view *view, struct got_repository *repo)
6270 {
6271 	const struct got_error *err = NULL;
6272 	struct tog_ref_view_state *s = &view->state.ref;
6273 
6274 	s->selected_entry = 0;
6275 	s->repo = repo;
6276 
6277 	TAILQ_INIT(&s->refs);
6278 	STAILQ_INIT(&s->colors);
6279 
6280 	err = ref_view_load_refs(s);
6281 	if (err)
6282 		return err;
6283 
6284 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6285 		err = add_color(&s->colors, "^refs/heads/",
6286 		    TOG_COLOR_REFS_HEADS,
6287 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6288 		if (err)
6289 			goto done;
6290 
6291 		err = add_color(&s->colors, "^refs/tags/",
6292 		    TOG_COLOR_REFS_TAGS,
6293 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6294 		if (err)
6295 			goto done;
6296 
6297 		err = add_color(&s->colors, "^refs/remotes/",
6298 		    TOG_COLOR_REFS_REMOTES,
6299 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6300 		if (err)
6301 			goto done;
6302 
6303 		err = add_color(&s->colors, "^refs/got/backup/",
6304 		    TOG_COLOR_REFS_BACKUP,
6305 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6306 		if (err)
6307 			goto done;
6308 	}
6309 
6310 	view->show = show_ref_view;
6311 	view->input = input_ref_view;
6312 	view->close = close_ref_view;
6313 	view->search_start = search_start_ref_view;
6314 	view->search_next = search_next_ref_view;
6315 done:
6316 	if (err)
6317 		free_colors(&s->colors);
6318 	return err;
6319 }
6320 
6321 static const struct got_error *
6322 close_ref_view(struct tog_view *view)
6323 {
6324 	struct tog_ref_view_state *s = &view->state.ref;
6325 
6326 	ref_view_free_refs(s);
6327 	free_colors(&s->colors);
6328 
6329 	return NULL;
6330 }
6331 
6332 static const struct got_error *
6333 resolve_reflist_entry(struct got_object_id **commit_id,
6334     struct tog_reflist_entry *re, struct got_repository *repo)
6335 {
6336 	const struct got_error *err = NULL;
6337 	struct got_object_id *obj_id;
6338 	struct got_tag_object *tag = NULL;
6339 	int obj_type;
6340 
6341 	*commit_id = NULL;
6342 
6343 	err = got_ref_resolve(&obj_id, repo, re->ref);
6344 	if (err)
6345 		return err;
6346 
6347 	err = got_object_get_type(&obj_type, repo, obj_id);
6348 	if (err)
6349 		goto done;
6350 
6351 	switch (obj_type) {
6352 	case GOT_OBJ_TYPE_COMMIT:
6353 		*commit_id = obj_id;
6354 		break;
6355 	case GOT_OBJ_TYPE_TAG:
6356 		err = got_object_open_as_tag(&tag, repo, obj_id);
6357 		if (err)
6358 			goto done;
6359 		free(obj_id);
6360 		err = got_object_get_type(&obj_type, repo,
6361 		    got_object_tag_get_object_id(tag));
6362 		if (err)
6363 			goto done;
6364 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6365 			err = got_error(GOT_ERR_OBJ_TYPE);
6366 			goto done;
6367 		}
6368 		*commit_id = got_object_id_dup(
6369 		    got_object_tag_get_object_id(tag));
6370 		if (*commit_id == NULL) {
6371 			err = got_error_from_errno("got_object_id_dup");
6372 			goto done;
6373 		}
6374 		break;
6375 	default:
6376 		err = got_error(GOT_ERR_OBJ_TYPE);
6377 		break;
6378 	}
6379 
6380 done:
6381 	if (tag)
6382 		got_object_tag_close(tag);
6383 	if (err) {
6384 		free(*commit_id);
6385 		*commit_id = NULL;
6386 	}
6387 	return err;
6388 }
6389 
6390 static const struct got_error *
6391 log_ref_entry(struct tog_view **new_view, int begin_x,
6392     struct tog_reflist_entry *re, struct got_repository *repo)
6393 {
6394 	struct tog_view *log_view;
6395 	const struct got_error *err = NULL;
6396 	struct got_object_id *commit_id = NULL;
6397 
6398 	*new_view = NULL;
6399 
6400 	err = resolve_reflist_entry(&commit_id, re, repo);
6401 	if (err) {
6402 		if (err->code != GOT_ERR_OBJ_TYPE)
6403 			return err;
6404 		else
6405 			return NULL;
6406 	}
6407 
6408 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6409 	if (log_view == NULL) {
6410 		err = got_error_from_errno("view_open");
6411 		goto done;
6412 	}
6413 
6414 	err = open_log_view(log_view, commit_id, repo,
6415 	    got_ref_get_name(re->ref), "", 0);
6416 done:
6417 	if (err)
6418 		view_close(log_view);
6419 	else
6420 		*new_view = log_view;
6421 	free(commit_id);
6422 	return err;
6423 }
6424 
6425 static void
6426 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6427 {
6428 	struct tog_reflist_entry *re;
6429 	int i = 0;
6430 
6431 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6432 		return;
6433 
6434 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6435 	while (i++ < maxscroll) {
6436 		if (re == NULL)
6437 			break;
6438 		s->first_displayed_entry = re;
6439 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6440 	}
6441 }
6442 
6443 static void
6444 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6445 {
6446 	struct tog_reflist_entry *next, *last;
6447 	int n = 0;
6448 
6449 	if (s->first_displayed_entry)
6450 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6451 	else
6452 		next = TAILQ_FIRST(&s->refs);
6453 
6454 	last = s->last_displayed_entry;
6455 	while (next && last && n++ < maxscroll) {
6456 		last = TAILQ_NEXT(last, entry);
6457 		if (last) {
6458 			s->first_displayed_entry = next;
6459 			next = TAILQ_NEXT(next, entry);
6460 		}
6461 	}
6462 }
6463 
6464 static const struct got_error *
6465 search_start_ref_view(struct tog_view *view)
6466 {
6467 	struct tog_ref_view_state *s = &view->state.ref;
6468 
6469 	s->matched_entry = NULL;
6470 	return NULL;
6471 }
6472 
6473 static int
6474 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6475 {
6476 	regmatch_t regmatch;
6477 
6478 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6479 	    0) == 0;
6480 }
6481 
6482 static const struct got_error *
6483 search_next_ref_view(struct tog_view *view)
6484 {
6485 	struct tog_ref_view_state *s = &view->state.ref;
6486 	struct tog_reflist_entry *re = NULL;
6487 
6488 	if (!view->searching) {
6489 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6490 		return NULL;
6491 	}
6492 
6493 	if (s->matched_entry) {
6494 		if (view->searching == TOG_SEARCH_FORWARD) {
6495 			if (s->selected_entry)
6496 				re = TAILQ_NEXT(s->selected_entry, entry);
6497 			else
6498 				re = TAILQ_PREV(s->selected_entry,
6499 				    tog_reflist_head, entry);
6500 		} else {
6501 			if (s->selected_entry == NULL)
6502 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6503 			else
6504 				re = TAILQ_PREV(s->selected_entry,
6505 				    tog_reflist_head, entry);
6506 		}
6507 	} else {
6508 		if (s->selected_entry)
6509 			re = s->selected_entry;
6510 		else if (view->searching == TOG_SEARCH_FORWARD)
6511 			re = TAILQ_FIRST(&s->refs);
6512 		else
6513 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6514 	}
6515 
6516 	while (1) {
6517 		if (re == NULL) {
6518 			if (s->matched_entry == NULL) {
6519 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6520 				return NULL;
6521 			}
6522 			if (view->searching == TOG_SEARCH_FORWARD)
6523 				re = TAILQ_FIRST(&s->refs);
6524 			else
6525 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6526 		}
6527 
6528 		if (match_reflist_entry(re, &view->regex)) {
6529 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6530 			s->matched_entry = re;
6531 			break;
6532 		}
6533 
6534 		if (view->searching == TOG_SEARCH_FORWARD)
6535 			re = TAILQ_NEXT(re, entry);
6536 		else
6537 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6538 	}
6539 
6540 	if (s->matched_entry) {
6541 		s->first_displayed_entry = s->matched_entry;
6542 		s->selected = 0;
6543 	}
6544 
6545 	return NULL;
6546 }
6547 
6548 static const struct got_error *
6549 show_ref_view(struct tog_view *view)
6550 {
6551 	const struct got_error *err = NULL;
6552 	struct tog_ref_view_state *s = &view->state.ref;
6553 	struct tog_reflist_entry *re;
6554 	char *line = NULL;
6555 	wchar_t *wline;
6556 	struct tog_color *tc;
6557 	int width, n;
6558 	int limit = view->nlines;
6559 
6560 	werase(view->window);
6561 
6562 	s->ndisplayed = 0;
6563 
6564 	if (limit == 0)
6565 		return NULL;
6566 
6567 	re = s->first_displayed_entry;
6568 
6569 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6570 	    s->nrefs) == -1)
6571 		return got_error_from_errno("asprintf");
6572 
6573 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6574 	if (err) {
6575 		free(line);
6576 		return err;
6577 	}
6578 	if (view_needs_focus_indication(view))
6579 		wstandout(view->window);
6580 	waddwstr(view->window, wline);
6581 	if (view_needs_focus_indication(view))
6582 		wstandend(view->window);
6583 	free(wline);
6584 	wline = NULL;
6585 	free(line);
6586 	line = NULL;
6587 	if (width < view->ncols - 1)
6588 		waddch(view->window, '\n');
6589 	if (--limit <= 0)
6590 		return NULL;
6591 
6592 	n = 0;
6593 	while (re && limit > 0) {
6594 		char *line = NULL;
6595 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6596 
6597 		if (s->show_date) {
6598 			struct got_commit_object *ci;
6599 			struct got_tag_object *tag;
6600 			struct got_object_id *id;
6601 			struct tm tm;
6602 			time_t t;
6603 
6604 			err = got_ref_resolve(&id, s->repo, re->ref);
6605 			if (err)
6606 				return err;
6607 			err = got_object_open_as_tag(&tag, s->repo, id);
6608 			if (err) {
6609 				if (err->code != GOT_ERR_OBJ_TYPE) {
6610 					free(id);
6611 					return err;
6612 				}
6613 				err = got_object_open_as_commit(&ci, s->repo,
6614 				    id);
6615 				if (err) {
6616 					free(id);
6617 					return err;
6618 				}
6619 				t = got_object_commit_get_committer_time(ci);
6620 				got_object_commit_close(ci);
6621 			} else {
6622 				t = got_object_tag_get_tagger_time(tag);
6623 				got_object_tag_close(tag);
6624 			}
6625 			free(id);
6626 			if (gmtime_r(&t, &tm) == NULL)
6627 				return got_error_from_errno("gmtime_r");
6628 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6629 				return got_error(GOT_ERR_NO_SPACE);
6630 		}
6631 		if (got_ref_is_symbolic(re->ref)) {
6632 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6633 			    ymd : "", got_ref_get_name(re->ref),
6634 			    got_ref_get_symref_target(re->ref)) == -1)
6635 				return got_error_from_errno("asprintf");
6636 		} else if (s->show_ids) {
6637 			struct got_object_id *id;
6638 			char *id_str;
6639 			err = got_ref_resolve(&id, s->repo, re->ref);
6640 			if (err)
6641 				return err;
6642 			err = got_object_id_str(&id_str, id);
6643 			if (err) {
6644 				free(id);
6645 				return err;
6646 			}
6647 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6648 			    got_ref_get_name(re->ref), id_str) == -1) {
6649 				err = got_error_from_errno("asprintf");
6650 				free(id);
6651 				free(id_str);
6652 				return err;
6653 			}
6654 			free(id);
6655 			free(id_str);
6656 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6657 		    got_ref_get_name(re->ref)) == -1)
6658 			return got_error_from_errno("asprintf");
6659 
6660 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6661 		    0, 0);
6662 		if (err) {
6663 			free(line);
6664 			return err;
6665 		}
6666 		if (n == s->selected) {
6667 			if (view->focussed)
6668 				wstandout(view->window);
6669 			s->selected_entry = re;
6670 		}
6671 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6672 		if (tc)
6673 			wattr_on(view->window,
6674 			    COLOR_PAIR(tc->colorpair), NULL);
6675 		waddwstr(view->window, wline);
6676 		if (tc)
6677 			wattr_off(view->window,
6678 			    COLOR_PAIR(tc->colorpair), NULL);
6679 		if (width < view->ncols - 1)
6680 			waddch(view->window, '\n');
6681 		if (n == s->selected && view->focussed)
6682 			wstandend(view->window);
6683 		free(line);
6684 		free(wline);
6685 		wline = NULL;
6686 		n++;
6687 		s->ndisplayed++;
6688 		s->last_displayed_entry = re;
6689 
6690 		limit--;
6691 		re = TAILQ_NEXT(re, entry);
6692 	}
6693 
6694 	view_vborder(view);
6695 	return err;
6696 }
6697 
6698 static const struct got_error *
6699 browse_ref_tree(struct tog_view **new_view, int begin_x,
6700     struct tog_reflist_entry *re, struct got_repository *repo)
6701 {
6702 	const struct got_error *err = NULL;
6703 	struct got_object_id *commit_id = NULL;
6704 	struct tog_view *tree_view;
6705 
6706 	*new_view = NULL;
6707 
6708 	err = resolve_reflist_entry(&commit_id, re, repo);
6709 	if (err) {
6710 		if (err->code != GOT_ERR_OBJ_TYPE)
6711 			return err;
6712 		else
6713 			return NULL;
6714 	}
6715 
6716 
6717 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6718 	if (tree_view == NULL) {
6719 		err = got_error_from_errno("view_open");
6720 		goto done;
6721 	}
6722 
6723 	err = open_tree_view(tree_view, commit_id,
6724 	    got_ref_get_name(re->ref), repo);
6725 	if (err)
6726 		goto done;
6727 
6728 	*new_view = tree_view;
6729 done:
6730 	free(commit_id);
6731 	return err;
6732 }
6733 static const struct got_error *
6734 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6735 {
6736 	const struct got_error *err = NULL;
6737 	struct tog_ref_view_state *s = &view->state.ref;
6738 	struct tog_view *log_view, *tree_view;
6739 	struct tog_reflist_entry *re;
6740 	int begin_x = 0, n, nscroll = view->nlines - 1;
6741 
6742 	switch (ch) {
6743 	case 'i':
6744 		s->show_ids = !s->show_ids;
6745 		break;
6746 	case 'm':
6747 		s->show_date = !s->show_date;
6748 		break;
6749 	case 'o':
6750 		s->sort_by_date = !s->sort_by_date;
6751 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6752 		    got_ref_cmp_by_commit_timestamp_descending :
6753 		    tog_ref_cmp_by_name, s->repo);
6754 		if (err)
6755 			break;
6756 		got_reflist_object_id_map_free(tog_refs_idmap);
6757 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6758 		    &tog_refs, s->repo);
6759 		if (err)
6760 			break;
6761 		ref_view_free_refs(s);
6762 		err = ref_view_load_refs(s);
6763 		break;
6764 	case KEY_ENTER:
6765 	case '\r':
6766 		if (!s->selected_entry)
6767 			break;
6768 		if (view_is_parent_view(view))
6769 			begin_x = view_split_begin_x(view->begin_x);
6770 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6771 		    s->repo);
6772 		view->focussed = 0;
6773 		log_view->focussed = 1;
6774 		if (view_is_parent_view(view)) {
6775 			err = view_close_child(view);
6776 			if (err)
6777 				return err;
6778 			err = view_set_child(view, log_view);
6779 			if (err)
6780 				return err;
6781 			view->focus_child = 1;
6782 		} else
6783 			*new_view = log_view;
6784 		break;
6785 	case 't':
6786 		if (!s->selected_entry)
6787 			break;
6788 		if (view_is_parent_view(view))
6789 			begin_x = view_split_begin_x(view->begin_x);
6790 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6791 		    s->repo);
6792 		if (err || tree_view == NULL)
6793 			break;
6794 		view->focussed = 0;
6795 		tree_view->focussed = 1;
6796 		if (view_is_parent_view(view)) {
6797 			err = view_close_child(view);
6798 			if (err)
6799 				return err;
6800 			err = view_set_child(view, tree_view);
6801 			if (err)
6802 				return err;
6803 			view->focus_child = 1;
6804 		} else
6805 			*new_view = tree_view;
6806 		break;
6807 	case 'g':
6808 	case KEY_HOME:
6809 		s->selected = 0;
6810 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6811 		break;
6812 	case 'G':
6813 	case KEY_END:
6814 		s->selected = 0;
6815 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6816 		for (n = 0; n < view->nlines - 1; n++) {
6817 			if (re == NULL)
6818 				break;
6819 			s->first_displayed_entry = re;
6820 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6821 		}
6822 		if (n > 0)
6823 			s->selected = n - 1;
6824 		break;
6825 	case 'k':
6826 	case KEY_UP:
6827 	case CTRL('p'):
6828 		if (s->selected > 0) {
6829 			s->selected--;
6830 			break;
6831 		}
6832 		ref_scroll_up(s, 1);
6833 		break;
6834 	case CTRL('u'):
6835 	case 'u':
6836 		nscroll /= 2;
6837 		/* FALL THROUGH */
6838 	case KEY_PPAGE:
6839 	case CTRL('b'):
6840 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6841 			s->selected -= MIN(nscroll, s->selected);
6842 		ref_scroll_up(s, MAX(0, nscroll));
6843 		break;
6844 	case 'j':
6845 	case KEY_DOWN:
6846 	case CTRL('n'):
6847 		if (s->selected < s->ndisplayed - 1) {
6848 			s->selected++;
6849 			break;
6850 		}
6851 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6852 			/* can't scroll any further */
6853 			break;
6854 		ref_scroll_down(s, 1);
6855 		break;
6856 	case CTRL('d'):
6857 	case 'd':
6858 		nscroll /= 2;
6859 		/* FALL THROUGH */
6860 	case KEY_NPAGE:
6861 	case CTRL('f'):
6862 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6863 			/* can't scroll any further; move cursor down */
6864 			if (s->selected < s->ndisplayed - 1)
6865 				s->selected += MIN(nscroll,
6866 				    s->ndisplayed - s->selected - 1);
6867 			break;
6868 		}
6869 		ref_scroll_down(s, nscroll);
6870 		break;
6871 	case CTRL('l'):
6872 		tog_free_refs();
6873 		err = tog_load_refs(s->repo, s->sort_by_date);
6874 		if (err)
6875 			break;
6876 		ref_view_free_refs(s);
6877 		err = ref_view_load_refs(s);
6878 		break;
6879 	case KEY_RESIZE:
6880 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6881 			s->selected = view->nlines - 2;
6882 		break;
6883 	default:
6884 		break;
6885 	}
6886 
6887 	return err;
6888 }
6889 
6890 __dead static void
6891 usage_ref(void)
6892 {
6893 	endwin();
6894 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6895 	    getprogname());
6896 	exit(1);
6897 }
6898 
6899 static const struct got_error *
6900 cmd_ref(int argc, char *argv[])
6901 {
6902 	const struct got_error *error;
6903 	struct got_repository *repo = NULL;
6904 	struct got_worktree *worktree = NULL;
6905 	char *cwd = NULL, *repo_path = NULL;
6906 	int ch;
6907 	struct tog_view *view;
6908 	int *pack_fds = NULL;
6909 
6910 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6911 		switch (ch) {
6912 		case 'r':
6913 			repo_path = realpath(optarg, NULL);
6914 			if (repo_path == NULL)
6915 				return got_error_from_errno2("realpath",
6916 				    optarg);
6917 			break;
6918 		default:
6919 			usage_ref();
6920 			/* NOTREACHED */
6921 		}
6922 	}
6923 
6924 	argc -= optind;
6925 	argv += optind;
6926 
6927 	if (argc > 1)
6928 		usage_ref();
6929 
6930 	error = got_repo_pack_fds_open(&pack_fds);
6931 	if (error != NULL)
6932 		goto done;
6933 
6934 	if (repo_path == NULL) {
6935 		cwd = getcwd(NULL, 0);
6936 		if (cwd == NULL)
6937 			return got_error_from_errno("getcwd");
6938 		error = got_worktree_open(&worktree, cwd);
6939 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6940 			goto done;
6941 		if (worktree)
6942 			repo_path =
6943 			    strdup(got_worktree_get_repo_path(worktree));
6944 		else
6945 			repo_path = strdup(cwd);
6946 		if (repo_path == NULL) {
6947 			error = got_error_from_errno("strdup");
6948 			goto done;
6949 		}
6950 	}
6951 
6952 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6953 	if (error != NULL)
6954 		goto done;
6955 
6956 	init_curses();
6957 
6958 	error = apply_unveil(got_repo_get_path(repo), NULL);
6959 	if (error)
6960 		goto done;
6961 
6962 	error = tog_load_refs(repo, 0);
6963 	if (error)
6964 		goto done;
6965 
6966 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6967 	if (view == NULL) {
6968 		error = got_error_from_errno("view_open");
6969 		goto done;
6970 	}
6971 
6972 	error = open_ref_view(view, repo);
6973 	if (error)
6974 		goto done;
6975 
6976 	if (worktree) {
6977 		/* Release work tree lock. */
6978 		got_worktree_close(worktree);
6979 		worktree = NULL;
6980 	}
6981 	error = view_loop(view);
6982 done:
6983 	free(repo_path);
6984 	free(cwd);
6985 	if (repo) {
6986 		const struct got_error *close_err = got_repo_close(repo);
6987 		if (close_err)
6988 			error = close_err;
6989 	}
6990 	if (pack_fds) {
6991 		const struct got_error *pack_err =
6992 		    got_repo_pack_fds_close(pack_fds);
6993 		if (error == NULL)
6994 			error = pack_err;
6995 	}
6996 	tog_free_refs();
6997 	return error;
6998 }
6999 
7000 static void
7001 list_commands(FILE *fp)
7002 {
7003 	size_t i;
7004 
7005 	fprintf(fp, "commands:");
7006 	for (i = 0; i < nitems(tog_commands); i++) {
7007 		const struct tog_cmd *cmd = &tog_commands[i];
7008 		fprintf(fp, " %s", cmd->name);
7009 	}
7010 	fputc('\n', fp);
7011 }
7012 
7013 __dead static void
7014 usage(int hflag, int status)
7015 {
7016 	FILE *fp = (status == 0) ? stdout : stderr;
7017 
7018 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7019 	    getprogname());
7020 	if (hflag) {
7021 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7022 		list_commands(fp);
7023 	}
7024 	exit(status);
7025 }
7026 
7027 static char **
7028 make_argv(int argc, ...)
7029 {
7030 	va_list ap;
7031 	char **argv;
7032 	int i;
7033 
7034 	va_start(ap, argc);
7035 
7036 	argv = calloc(argc, sizeof(char *));
7037 	if (argv == NULL)
7038 		err(1, "calloc");
7039 	for (i = 0; i < argc; i++) {
7040 		argv[i] = strdup(va_arg(ap, char *));
7041 		if (argv[i] == NULL)
7042 			err(1, "strdup");
7043 	}
7044 
7045 	va_end(ap);
7046 	return argv;
7047 }
7048 
7049 /*
7050  * Try to convert 'tog path' into a 'tog log path' command.
7051  * The user could simply have mistyped the command rather than knowingly
7052  * provided a path. So check whether argv[0] can in fact be resolved
7053  * to a path in the HEAD commit and print a special error if not.
7054  * This hack is for mpi@ <3
7055  */
7056 static const struct got_error *
7057 tog_log_with_path(int argc, char *argv[])
7058 {
7059 	const struct got_error *error = NULL, *close_err;
7060 	const struct tog_cmd *cmd = NULL;
7061 	struct got_repository *repo = NULL;
7062 	struct got_worktree *worktree = NULL;
7063 	struct got_object_id *commit_id = NULL, *id = NULL;
7064 	struct got_commit_object *commit = NULL;
7065 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7066 	char *commit_id_str = NULL, **cmd_argv = NULL;
7067 	int *pack_fds = NULL;
7068 
7069 	cwd = getcwd(NULL, 0);
7070 	if (cwd == NULL)
7071 		return got_error_from_errno("getcwd");
7072 
7073 	error = got_repo_pack_fds_open(&pack_fds);
7074 	if (error != NULL)
7075 		goto done;
7076 
7077 	error = got_worktree_open(&worktree, cwd);
7078 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7079 		goto done;
7080 
7081 	if (worktree)
7082 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7083 	else
7084 		repo_path = strdup(cwd);
7085 	if (repo_path == NULL) {
7086 		error = got_error_from_errno("strdup");
7087 		goto done;
7088 	}
7089 
7090 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7091 	if (error != NULL)
7092 		goto done;
7093 
7094 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7095 	    repo, worktree);
7096 	if (error)
7097 		goto done;
7098 
7099 	error = tog_load_refs(repo, 0);
7100 	if (error)
7101 		goto done;
7102 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7103 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7104 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7105 	if (error)
7106 		goto done;
7107 
7108 	if (worktree) {
7109 		got_worktree_close(worktree);
7110 		worktree = NULL;
7111 	}
7112 
7113 	error = got_object_open_as_commit(&commit, repo, commit_id);
7114 	if (error)
7115 		goto done;
7116 
7117 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7118 	if (error) {
7119 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7120 			goto done;
7121 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7122 		    getprogname(), argv[0]);
7123 		usage(1, 1);
7124 		/* not reached */
7125 	}
7126 
7127 	close_err = got_repo_close(repo);
7128 	if (error == NULL)
7129 		error = close_err;
7130 	repo = NULL;
7131 
7132 	error = got_object_id_str(&commit_id_str, commit_id);
7133 	if (error)
7134 		goto done;
7135 
7136 	cmd = &tog_commands[0]; /* log */
7137 	argc = 4;
7138 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7139 	error = cmd->cmd_main(argc, cmd_argv);
7140 done:
7141 	if (repo) {
7142 		close_err = got_repo_close(repo);
7143 		if (error == NULL)
7144 			error = close_err;
7145 	}
7146 	if (commit)
7147 		got_object_commit_close(commit);
7148 	if (worktree)
7149 		got_worktree_close(worktree);
7150 	if (pack_fds) {
7151 		const struct got_error *pack_err =
7152 		    got_repo_pack_fds_close(pack_fds);
7153 		if (error == NULL)
7154 			error = pack_err;
7155 	}
7156 	free(id);
7157 	free(commit_id_str);
7158 	free(commit_id);
7159 	free(cwd);
7160 	free(repo_path);
7161 	free(in_repo_path);
7162 	if (cmd_argv) {
7163 		int i;
7164 		for (i = 0; i < argc; i++)
7165 			free(cmd_argv[i]);
7166 		free(cmd_argv);
7167 	}
7168 	tog_free_refs();
7169 	return error;
7170 }
7171 
7172 int
7173 main(int argc, char *argv[])
7174 {
7175 	const struct got_error *error = NULL;
7176 	const struct tog_cmd *cmd = NULL;
7177 	int ch, hflag = 0, Vflag = 0;
7178 	char **cmd_argv = NULL;
7179 	static const struct option longopts[] = {
7180 	    { "version", no_argument, NULL, 'V' },
7181 	    { NULL, 0, NULL, 0}
7182 	};
7183 
7184 	setlocale(LC_CTYPE, "");
7185 
7186 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7187 		switch (ch) {
7188 		case 'h':
7189 			hflag = 1;
7190 			break;
7191 		case 'V':
7192 			Vflag = 1;
7193 			break;
7194 		default:
7195 			usage(hflag, 1);
7196 			/* NOTREACHED */
7197 		}
7198 	}
7199 
7200 	argc -= optind;
7201 	argv += optind;
7202 	optind = 1;
7203 	optreset = 1;
7204 
7205 	if (Vflag) {
7206 		got_version_print_str();
7207 		return 0;
7208 	}
7209 
7210 #ifndef PROFILE
7211 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7212 	    NULL) == -1)
7213 		err(1, "pledge");
7214 #endif
7215 
7216 	if (argc == 0) {
7217 		if (hflag)
7218 			usage(hflag, 0);
7219 		/* Build an argument vector which runs a default command. */
7220 		cmd = &tog_commands[0];
7221 		argc = 1;
7222 		cmd_argv = make_argv(argc, cmd->name);
7223 	} else {
7224 		size_t i;
7225 
7226 		/* Did the user specify a command? */
7227 		for (i = 0; i < nitems(tog_commands); i++) {
7228 			if (strncmp(tog_commands[i].name, argv[0],
7229 			    strlen(argv[0])) == 0) {
7230 				cmd = &tog_commands[i];
7231 				break;
7232 			}
7233 		}
7234 	}
7235 
7236 	if (cmd == NULL) {
7237 		if (argc != 1)
7238 			usage(0, 1);
7239 		/* No command specified; try log with a path */
7240 		error = tog_log_with_path(argc, argv);
7241 	} else {
7242 		if (hflag)
7243 			cmd->cmd_usage();
7244 		else
7245 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7246 	}
7247 
7248 	endwin();
7249 	putchar('\n');
7250 	if (cmd_argv) {
7251 		int i;
7252 		for (i = 0; i < argc; i++)
7253 			free(cmd_argv[i]);
7254 		free(cmd_argv);
7255 	}
7256 
7257 	if (error && error->code != GOT_ERR_CANCELLED)
7258 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7259 	return 0;
7260 }