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