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", id_str ? id_str :
1806 		    "........................................",
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 		tc = match_color(&s->colors, line);
3241 		if (tc)
3242 			wattr_on(view->window,
3243 			    COLOR_PAIR(tc->colorpair), NULL);
3244 		if (s->first_displayed_line + nprinted == s->matched_line &&
3245 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3246 			err = add_matched_line(&width, line, view->ncols, 0,
3247 			    view->window, view->x, regmatch);
3248 			if (err) {
3249 				free(line);
3250 				return err;
3251 			}
3252 			view->maxx = MAX(view->maxx, width);
3253 		} else {
3254 			int skip;
3255 
3256 			/* Set view->maxx based on full line length. */
3257 			err = format_line(&wline, &width, NULL, line,
3258 			    0, INT_MAX, 0, view->x ? 1 : 0);
3259 			if (err) {
3260 				free(line);
3261 				return err;
3262 			}
3263 			view->maxx = MAX(view->maxx, width);
3264 
3265 			/*
3266 			 * Get a new version of the line for display.
3267 			 * This will be scrolled and/or trimmed in length.
3268 			 */
3269 			free(wline);
3270 			err = format_line(&wline, &width, &skip, line,
3271 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3272 			if (err) {
3273 				free(line);
3274 				return err;
3275 			}
3276 			waddwstr(view->window, &wline[skip]);
3277 			free(wline);
3278 			wline = NULL;
3279 		}
3280 		if (tc)
3281 			wattr_off(view->window,
3282 			    COLOR_PAIR(tc->colorpair), NULL);
3283 		if (width <= view->ncols - 1)
3284 			waddch(view->window, '\n');
3285 		nprinted++;
3286 	}
3287 	free(line);
3288 	if (nprinted >= 1)
3289 		s->last_displayed_line = s->first_displayed_line +
3290 		    (nprinted - 1);
3291 	else
3292 		s->last_displayed_line = s->first_displayed_line;
3293 
3294 	view_vborder(view);
3295 
3296 	if (s->eof) {
3297 		while (nprinted < view->nlines) {
3298 			waddch(view->window, '\n');
3299 			nprinted++;
3300 		}
3301 
3302 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3303 		    view->ncols, 0, 0);
3304 		if (err) {
3305 			return err;
3306 		}
3307 
3308 		wstandout(view->window);
3309 		waddwstr(view->window, wline);
3310 		free(wline);
3311 		wline = NULL;
3312 		wstandend(view->window);
3313 	}
3314 
3315 	return NULL;
3316 }
3317 
3318 static char *
3319 get_datestr(time_t *time, char *datebuf)
3320 {
3321 	struct tm mytm, *tm;
3322 	char *p, *s;
3323 
3324 	tm = gmtime_r(time, &mytm);
3325 	if (tm == NULL)
3326 		return NULL;
3327 	s = asctime_r(tm, datebuf);
3328 	if (s == NULL)
3329 		return NULL;
3330 	p = strchr(s, '\n');
3331 	if (p)
3332 		*p = '\0';
3333 	return s;
3334 }
3335 
3336 static const struct got_error *
3337 get_changed_paths(struct got_pathlist_head *paths,
3338     struct got_commit_object *commit, struct got_repository *repo)
3339 {
3340 	const struct got_error *err = NULL;
3341 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3342 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3343 	struct got_object_qid *qid;
3344 
3345 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3346 	if (qid != NULL) {
3347 		struct got_commit_object *pcommit;
3348 		err = got_object_open_as_commit(&pcommit, repo,
3349 		    &qid->id);
3350 		if (err)
3351 			return err;
3352 
3353 		tree_id1 = got_object_id_dup(
3354 		    got_object_commit_get_tree_id(pcommit));
3355 		if (tree_id1 == NULL) {
3356 			got_object_commit_close(pcommit);
3357 			return got_error_from_errno("got_object_id_dup");
3358 		}
3359 		got_object_commit_close(pcommit);
3360 
3361 	}
3362 
3363 	if (tree_id1) {
3364 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3365 		if (err)
3366 			goto done;
3367 	}
3368 
3369 	tree_id2 = got_object_commit_get_tree_id(commit);
3370 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3371 	if (err)
3372 		goto done;
3373 
3374 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3375 	    got_diff_tree_collect_changed_paths, paths, 0);
3376 done:
3377 	if (tree1)
3378 		got_object_tree_close(tree1);
3379 	if (tree2)
3380 		got_object_tree_close(tree2);
3381 	free(tree_id1);
3382 	return err;
3383 }
3384 
3385 static const struct got_error *
3386 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3387 {
3388 	off_t *p;
3389 
3390 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3391 	if (p == NULL)
3392 		return got_error_from_errno("reallocarray");
3393 	*line_offsets = p;
3394 	(*line_offsets)[*nlines] = off;
3395 	(*nlines)++;
3396 	return NULL;
3397 }
3398 
3399 static const struct got_error *
3400 write_commit_info(off_t **line_offsets, size_t *nlines,
3401     struct got_object_id *commit_id, struct got_reflist_head *refs,
3402     struct got_repository *repo, FILE *outfile)
3403 {
3404 	const struct got_error *err = NULL;
3405 	char datebuf[26], *datestr;
3406 	struct got_commit_object *commit;
3407 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3408 	time_t committer_time;
3409 	const char *author, *committer;
3410 	char *refs_str = NULL;
3411 	struct got_pathlist_head changed_paths;
3412 	struct got_pathlist_entry *pe;
3413 	off_t outoff = 0;
3414 	int n;
3415 
3416 	TAILQ_INIT(&changed_paths);
3417 
3418 	if (refs) {
3419 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3420 		if (err)
3421 			return err;
3422 	}
3423 
3424 	err = got_object_open_as_commit(&commit, repo, commit_id);
3425 	if (err)
3426 		return err;
3427 
3428 	err = got_object_id_str(&id_str, commit_id);
3429 	if (err) {
3430 		err = got_error_from_errno("got_object_id_str");
3431 		goto done;
3432 	}
3433 
3434 	err = add_line_offset(line_offsets, nlines, 0);
3435 	if (err)
3436 		goto done;
3437 
3438 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3439 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3440 	if (n < 0) {
3441 		err = got_error_from_errno("fprintf");
3442 		goto done;
3443 	}
3444 	outoff += n;
3445 	err = add_line_offset(line_offsets, nlines, outoff);
3446 	if (err)
3447 		goto done;
3448 
3449 	n = fprintf(outfile, "from: %s\n",
3450 	    got_object_commit_get_author(commit));
3451 	if (n < 0) {
3452 		err = got_error_from_errno("fprintf");
3453 		goto done;
3454 	}
3455 	outoff += n;
3456 	err = add_line_offset(line_offsets, nlines, outoff);
3457 	if (err)
3458 		goto done;
3459 
3460 	committer_time = got_object_commit_get_committer_time(commit);
3461 	datestr = get_datestr(&committer_time, datebuf);
3462 	if (datestr) {
3463 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3464 		if (n < 0) {
3465 			err = got_error_from_errno("fprintf");
3466 			goto done;
3467 		}
3468 		outoff += n;
3469 		err = add_line_offset(line_offsets, nlines, outoff);
3470 		if (err)
3471 			goto done;
3472 	}
3473 	author = got_object_commit_get_author(commit);
3474 	committer = got_object_commit_get_committer(commit);
3475 	if (strcmp(author, committer) != 0) {
3476 		n = fprintf(outfile, "via: %s\n", committer);
3477 		if (n < 0) {
3478 			err = got_error_from_errno("fprintf");
3479 			goto done;
3480 		}
3481 		outoff += n;
3482 		err = add_line_offset(line_offsets, nlines, outoff);
3483 		if (err)
3484 			goto done;
3485 	}
3486 	if (got_object_commit_get_nparents(commit) > 1) {
3487 		const struct got_object_id_queue *parent_ids;
3488 		struct got_object_qid *qid;
3489 		int pn = 1;
3490 		parent_ids = got_object_commit_get_parent_ids(commit);
3491 		STAILQ_FOREACH(qid, parent_ids, entry) {
3492 			err = got_object_id_str(&id_str, &qid->id);
3493 			if (err)
3494 				goto done;
3495 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3496 			if (n < 0) {
3497 				err = got_error_from_errno("fprintf");
3498 				goto done;
3499 			}
3500 			outoff += n;
3501 			err = add_line_offset(line_offsets, nlines, outoff);
3502 			if (err)
3503 				goto done;
3504 			free(id_str);
3505 			id_str = NULL;
3506 		}
3507 	}
3508 
3509 	err = got_object_commit_get_logmsg(&logmsg, commit);
3510 	if (err)
3511 		goto done;
3512 	s = logmsg;
3513 	while ((line = strsep(&s, "\n")) != NULL) {
3514 		n = fprintf(outfile, "%s\n", line);
3515 		if (n < 0) {
3516 			err = got_error_from_errno("fprintf");
3517 			goto done;
3518 		}
3519 		outoff += n;
3520 		err = add_line_offset(line_offsets, nlines, outoff);
3521 		if (err)
3522 			goto done;
3523 	}
3524 
3525 	err = get_changed_paths(&changed_paths, commit, repo);
3526 	if (err)
3527 		goto done;
3528 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3529 		struct got_diff_changed_path *cp = pe->data;
3530 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3531 		if (n < 0) {
3532 			err = got_error_from_errno("fprintf");
3533 			goto done;
3534 		}
3535 		outoff += n;
3536 		err = add_line_offset(line_offsets, nlines, outoff);
3537 		if (err)
3538 			goto done;
3539 		free((char *)pe->path);
3540 		free(pe->data);
3541 	}
3542 
3543 	fputc('\n', outfile);
3544 	outoff++;
3545 	err = add_line_offset(line_offsets, nlines, outoff);
3546 done:
3547 	got_pathlist_free(&changed_paths);
3548 	free(id_str);
3549 	free(logmsg);
3550 	free(refs_str);
3551 	got_object_commit_close(commit);
3552 	if (err) {
3553 		free(*line_offsets);
3554 		*line_offsets = NULL;
3555 		*nlines = 0;
3556 	}
3557 	return err;
3558 }
3559 
3560 static const struct got_error *
3561 create_diff(struct tog_diff_view_state *s)
3562 {
3563 	const struct got_error *err = NULL;
3564 	FILE *f = NULL;
3565 	int obj_type;
3566 
3567 	free(s->line_offsets);
3568 	s->line_offsets = malloc(sizeof(off_t));
3569 	if (s->line_offsets == NULL)
3570 		return got_error_from_errno("malloc");
3571 	s->nlines = 0;
3572 
3573 	f = got_opentemp();
3574 	if (f == NULL) {
3575 		err = got_error_from_errno("got_opentemp");
3576 		goto done;
3577 	}
3578 	if (s->f && fclose(s->f) == EOF) {
3579 		err = got_error_from_errno("fclose");
3580 		goto done;
3581 	}
3582 	s->f = f;
3583 
3584 	if (s->id1)
3585 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3586 	else
3587 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3588 	if (err)
3589 		goto done;
3590 
3591 	switch (obj_type) {
3592 	case GOT_OBJ_TYPE_BLOB:
3593 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3594 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3595 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3596 		    s->repo, s->f);
3597 		break;
3598 	case GOT_OBJ_TYPE_TREE:
3599 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3600 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3601 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3602 		break;
3603 	case GOT_OBJ_TYPE_COMMIT: {
3604 		const struct got_object_id_queue *parent_ids;
3605 		struct got_object_qid *pid;
3606 		struct got_commit_object *commit2;
3607 		struct got_reflist_head *refs;
3608 
3609 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3610 		if (err)
3611 			goto done;
3612 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3613 		/* Show commit info if we're diffing to a parent/root commit. */
3614 		if (s->id1 == NULL) {
3615 			err = write_commit_info(&s->line_offsets, &s->nlines,
3616 			    s->id2, refs, s->repo, s->f);
3617 			if (err)
3618 				goto done;
3619 		} else {
3620 			parent_ids = got_object_commit_get_parent_ids(commit2);
3621 			STAILQ_FOREACH(pid, parent_ids, entry) {
3622 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3623 					err = write_commit_info(
3624 					    &s->line_offsets, &s->nlines,
3625 					    s->id2, refs, s->repo, s->f);
3626 					if (err)
3627 						goto done;
3628 					break;
3629 				}
3630 			}
3631 		}
3632 		got_object_commit_close(commit2);
3633 
3634 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3635 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3636 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3637 		break;
3638 	}
3639 	default:
3640 		err = got_error(GOT_ERR_OBJ_TYPE);
3641 		break;
3642 	}
3643 	if (err)
3644 		goto done;
3645 done:
3646 	if (s->f && fflush(s->f) != 0 && err == NULL)
3647 		err = got_error_from_errno("fflush");
3648 	return err;
3649 }
3650 
3651 static void
3652 diff_view_indicate_progress(struct tog_view *view)
3653 {
3654 	mvwaddstr(view->window, 0, 0, "diffing...");
3655 	update_panels();
3656 	doupdate();
3657 }
3658 
3659 static const struct got_error *
3660 search_start_diff_view(struct tog_view *view)
3661 {
3662 	struct tog_diff_view_state *s = &view->state.diff;
3663 
3664 	s->matched_line = 0;
3665 	return NULL;
3666 }
3667 
3668 static const struct got_error *
3669 search_next_diff_view(struct tog_view *view)
3670 {
3671 	struct tog_diff_view_state *s = &view->state.diff;
3672 	const struct got_error *err = NULL;
3673 	int lineno;
3674 	char *exstr = NULL, *line = NULL;
3675 	size_t linesize = 0;
3676 	ssize_t linelen;
3677 
3678 	if (!view->searching) {
3679 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3680 		return NULL;
3681 	}
3682 
3683 	if (s->matched_line) {
3684 		if (view->searching == TOG_SEARCH_FORWARD)
3685 			lineno = s->matched_line + 1;
3686 		else
3687 			lineno = s->matched_line - 1;
3688 	} else
3689 		lineno = s->first_displayed_line;
3690 
3691 	while (1) {
3692 		off_t offset;
3693 
3694 		if (lineno <= 0 || lineno > s->nlines) {
3695 			if (s->matched_line == 0) {
3696 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3697 				break;
3698 			}
3699 
3700 			if (view->searching == TOG_SEARCH_FORWARD)
3701 				lineno = 1;
3702 			else
3703 				lineno = s->nlines;
3704 		}
3705 
3706 		offset = s->line_offsets[lineno - 1];
3707 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3708 			free(line);
3709 			return got_error_from_errno("fseeko");
3710 		}
3711 		linelen = getline(&line, &linesize, s->f);
3712 		err = expand_tab(&exstr, line);
3713 		if (err)
3714 			break;
3715 		if (linelen != -1 &&
3716 		    match_line(exstr, &view->regex, 1, &view->regmatch)) {
3717 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3718 			s->matched_line = lineno;
3719 			break;
3720 		}
3721 		free(exstr);
3722 		exstr = NULL;
3723 		if (view->searching == TOG_SEARCH_FORWARD)
3724 			lineno++;
3725 		else
3726 			lineno--;
3727 	}
3728 	free(line);
3729 	free(exstr);
3730 
3731 	if (s->matched_line) {
3732 		s->first_displayed_line = s->matched_line;
3733 		s->selected_line = 1;
3734 	}
3735 
3736 	return err;
3737 }
3738 
3739 static const struct got_error *
3740 close_diff_view(struct tog_view *view)
3741 {
3742 	const struct got_error *err = NULL;
3743 	struct tog_diff_view_state *s = &view->state.diff;
3744 
3745 	free(s->id1);
3746 	s->id1 = NULL;
3747 	free(s->id2);
3748 	s->id2 = NULL;
3749 	if (s->f && fclose(s->f) == EOF)
3750 		err = got_error_from_errno("fclose");
3751 	s->f = NULL;
3752 	if (s->f1 && fclose(s->f1) == EOF)
3753 		err = got_error_from_errno("fclose");
3754 	s->f1 = NULL;
3755 	if (s->f2 && fclose(s->f2) == EOF)
3756 		err = got_error_from_errno("fclose");
3757 	s->f2 = NULL;
3758 	free_colors(&s->colors);
3759 	free(s->line_offsets);
3760 	s->line_offsets = NULL;
3761 	s->nlines = 0;
3762 	return err;
3763 }
3764 
3765 static const struct got_error *
3766 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3767     struct got_object_id *id2, const char *label1, const char *label2,
3768     int diff_context, int ignore_whitespace, int force_text_diff,
3769     struct tog_view *log_view, struct got_repository *repo)
3770 {
3771 	const struct got_error *err;
3772 	struct tog_diff_view_state *s = &view->state.diff;
3773 
3774 	memset(s, 0, sizeof(*s));
3775 
3776 	if (id1 != NULL && id2 != NULL) {
3777 	    int type1, type2;
3778 	    err = got_object_get_type(&type1, repo, id1);
3779 	    if (err)
3780 		return err;
3781 	    err = got_object_get_type(&type2, repo, id2);
3782 	    if (err)
3783 		return err;
3784 
3785 	    if (type1 != type2)
3786 		return got_error(GOT_ERR_OBJ_TYPE);
3787 	}
3788 	s->first_displayed_line = 1;
3789 	s->last_displayed_line = view->nlines;
3790 	s->selected_line = 1;
3791 	s->repo = repo;
3792 	s->id1 = id1;
3793 	s->id2 = id2;
3794 	s->label1 = label1;
3795 	s->label2 = label2;
3796 
3797 	if (id1) {
3798 		s->id1 = got_object_id_dup(id1);
3799 		if (s->id1 == NULL)
3800 			return got_error_from_errno("got_object_id_dup");
3801 		s->f1 = got_opentemp();
3802 		if (s->f1 == NULL) {
3803 			err = got_error_from_errno("got_opentemp");
3804 			goto done;
3805 		}
3806 	} else
3807 		s->id1 = NULL;
3808 
3809 	s->id2 = got_object_id_dup(id2);
3810 	if (s->id2 == NULL) {
3811 		err = got_error_from_errno("got_object_id_dup");
3812 		goto done;
3813 	}
3814 
3815 	s->f2 = got_opentemp();
3816 	if (s->f2 == NULL) {
3817 		err = got_error_from_errno("got_opentemp");
3818 		goto done;
3819 	}
3820 
3821 	s->first_displayed_line = 1;
3822 	s->last_displayed_line = view->nlines;
3823 	s->diff_context = diff_context;
3824 	s->ignore_whitespace = ignore_whitespace;
3825 	s->force_text_diff = force_text_diff;
3826 	s->log_view = log_view;
3827 	s->repo = repo;
3828 
3829 	STAILQ_INIT(&s->colors);
3830 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3831 		err = add_color(&s->colors,
3832 		    "^-", TOG_COLOR_DIFF_MINUS,
3833 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3834 		if (err)
3835 			goto done;
3836 		err = add_color(&s->colors, "^\\+",
3837 		    TOG_COLOR_DIFF_PLUS,
3838 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3839 		if (err)
3840 			goto done;
3841 		err = add_color(&s->colors,
3842 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3843 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3844 		if (err)
3845 			goto done;
3846 
3847 		err = add_color(&s->colors,
3848 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3849 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3850 		    get_color_value("TOG_COLOR_DIFF_META"));
3851 		if (err)
3852 			goto done;
3853 
3854 		err = add_color(&s->colors,
3855 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3856 		    get_color_value("TOG_COLOR_AUTHOR"));
3857 		if (err)
3858 			goto done;
3859 
3860 		err = add_color(&s->colors,
3861 		    "^date: ", TOG_COLOR_DATE,
3862 		    get_color_value("TOG_COLOR_DATE"));
3863 		if (err)
3864 			goto done;
3865 	}
3866 
3867 	if (log_view && view_is_splitscreen(view))
3868 		show_log_view(log_view); /* draw vborder */
3869 	diff_view_indicate_progress(view);
3870 
3871 	err = create_diff(s);
3872 
3873 	view->show = show_diff_view;
3874 	view->input = input_diff_view;
3875 	view->close = close_diff_view;
3876 	view->search_start = search_start_diff_view;
3877 	view->search_next = search_next_diff_view;
3878 done:
3879 	if (err)
3880 		close_diff_view(view);
3881 	return err;
3882 }
3883 
3884 static const struct got_error *
3885 show_diff_view(struct tog_view *view)
3886 {
3887 	const struct got_error *err;
3888 	struct tog_diff_view_state *s = &view->state.diff;
3889 	char *id_str1 = NULL, *id_str2, *header;
3890 	const char *label1, *label2;
3891 
3892 	if (s->id1) {
3893 		err = got_object_id_str(&id_str1, s->id1);
3894 		if (err)
3895 			return err;
3896 		label1 = s->label1 ? : id_str1;
3897 	} else
3898 		label1 = "/dev/null";
3899 
3900 	err = got_object_id_str(&id_str2, s->id2);
3901 	if (err)
3902 		return err;
3903 	label2 = s->label2 ? : id_str2;
3904 
3905 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3906 		err = got_error_from_errno("asprintf");
3907 		free(id_str1);
3908 		free(id_str2);
3909 		return err;
3910 	}
3911 	free(id_str1);
3912 	free(id_str2);
3913 
3914 	err = draw_file(view, header);
3915 	free(header);
3916 	return err;
3917 }
3918 
3919 static const struct got_error *
3920 set_selected_commit(struct tog_diff_view_state *s,
3921     struct commit_queue_entry *entry)
3922 {
3923 	const struct got_error *err;
3924 	const struct got_object_id_queue *parent_ids;
3925 	struct got_commit_object *selected_commit;
3926 	struct got_object_qid *pid;
3927 
3928 	free(s->id2);
3929 	s->id2 = got_object_id_dup(entry->id);
3930 	if (s->id2 == NULL)
3931 		return got_error_from_errno("got_object_id_dup");
3932 
3933 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3934 	if (err)
3935 		return err;
3936 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3937 	free(s->id1);
3938 	pid = STAILQ_FIRST(parent_ids);
3939 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3940 	got_object_commit_close(selected_commit);
3941 	return NULL;
3942 }
3943 
3944 static const struct got_error *
3945 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3946 {
3947 	const struct got_error *err = NULL;
3948 	struct tog_diff_view_state *s = &view->state.diff;
3949 	struct tog_log_view_state *ls;
3950 	struct commit_queue_entry *old_selected_entry;
3951 	char *line = NULL;
3952 	size_t linesize = 0;
3953 	ssize_t linelen;
3954 	int i, nscroll = view->nlines - 1;
3955 
3956 	switch (ch) {
3957 	case '0':
3958 		view->x = 0;
3959 		break;
3960 	case '$':
3961 		view->x = MAX(view->maxx - view->ncols / 3, 0);
3962 		break;
3963 	case KEY_RIGHT:
3964 	case 'l':
3965 		if (view->x + view->ncols / 3 < view->maxx)
3966 			view->x += 2;  /* move two columns right */
3967 		break;
3968 	case KEY_LEFT:
3969 	case 'h':
3970 		view->x -= MIN(view->x, 2);  /* move two columns back */
3971 		break;
3972 	case 'a':
3973 	case 'w':
3974 		if (ch == 'a')
3975 			s->force_text_diff = !s->force_text_diff;
3976 		if (ch == 'w')
3977 			s->ignore_whitespace = !s->ignore_whitespace;
3978 		wclear(view->window);
3979 		s->first_displayed_line = 1;
3980 		s->last_displayed_line = view->nlines;
3981 		s->matched_line = 0;
3982 		diff_view_indicate_progress(view);
3983 		err = create_diff(s);
3984 		break;
3985 	case 'g':
3986 	case KEY_HOME:
3987 		s->first_displayed_line = 1;
3988 		break;
3989 	case 'G':
3990 	case KEY_END:
3991 		if (s->eof)
3992 			break;
3993 
3994 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
3995 		s->eof = 1;
3996 		break;
3997 	case 'k':
3998 	case KEY_UP:
3999 	case CTRL('p'):
4000 		if (s->first_displayed_line > 1)
4001 			s->first_displayed_line--;
4002 		break;
4003 	case CTRL('u'):
4004 	case 'u':
4005 		nscroll /= 2;
4006 		/* FALL THROUGH */
4007 	case KEY_PPAGE:
4008 	case CTRL('b'):
4009 		if (s->first_displayed_line == 1)
4010 			break;
4011 		i = 0;
4012 		while (i++ < nscroll && s->first_displayed_line > 1)
4013 			s->first_displayed_line--;
4014 		break;
4015 	case 'j':
4016 	case KEY_DOWN:
4017 	case CTRL('n'):
4018 		if (!s->eof)
4019 			s->first_displayed_line++;
4020 		break;
4021 	case CTRL('d'):
4022 	case 'd':
4023 		nscroll /= 2;
4024 		/* FALL THROUGH */
4025 	case KEY_NPAGE:
4026 	case CTRL('f'):
4027 	case ' ':
4028 		if (s->eof)
4029 			break;
4030 		i = 0;
4031 		while (!s->eof && i++ < nscroll) {
4032 			linelen = getline(&line, &linesize, s->f);
4033 			s->first_displayed_line++;
4034 			if (linelen == -1) {
4035 				if (feof(s->f)) {
4036 					s->eof = 1;
4037 				} else
4038 					err = got_ferror(s->f, GOT_ERR_IO);
4039 				break;
4040 			}
4041 		}
4042 		free(line);
4043 		break;
4044 	case '[':
4045 		if (s->diff_context > 0) {
4046 			s->diff_context--;
4047 			s->matched_line = 0;
4048 			diff_view_indicate_progress(view);
4049 			err = create_diff(s);
4050 			if (s->first_displayed_line + view->nlines - 1 >
4051 			    s->nlines) {
4052 				s->first_displayed_line = 1;
4053 				s->last_displayed_line = view->nlines;
4054 			}
4055 		}
4056 		break;
4057 	case ']':
4058 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4059 			s->diff_context++;
4060 			s->matched_line = 0;
4061 			diff_view_indicate_progress(view);
4062 			err = create_diff(s);
4063 		}
4064 		break;
4065 	case '<':
4066 	case ',':
4067 		if (s->log_view == NULL)
4068 			break;
4069 		ls = &s->log_view->state.log;
4070 		old_selected_entry = ls->selected_entry;
4071 
4072 		err = input_log_view(NULL, s->log_view, KEY_UP);
4073 		if (err)
4074 			break;
4075 
4076 		if (old_selected_entry == ls->selected_entry)
4077 			break;
4078 
4079 		err = set_selected_commit(s, ls->selected_entry);
4080 		if (err)
4081 			break;
4082 
4083 		s->first_displayed_line = 1;
4084 		s->last_displayed_line = view->nlines;
4085 		s->matched_line = 0;
4086 		view->x = 0;
4087 
4088 		diff_view_indicate_progress(view);
4089 		err = create_diff(s);
4090 		break;
4091 	case '>':
4092 	case '.':
4093 		if (s->log_view == NULL)
4094 			break;
4095 		ls = &s->log_view->state.log;
4096 		old_selected_entry = ls->selected_entry;
4097 
4098 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4099 		if (err)
4100 			break;
4101 
4102 		if (old_selected_entry == ls->selected_entry)
4103 			break;
4104 
4105 		err = set_selected_commit(s, ls->selected_entry);
4106 		if (err)
4107 			break;
4108 
4109 		s->first_displayed_line = 1;
4110 		s->last_displayed_line = view->nlines;
4111 		s->matched_line = 0;
4112 		view->x = 0;
4113 
4114 		diff_view_indicate_progress(view);
4115 		err = create_diff(s);
4116 		break;
4117 	default:
4118 		break;
4119 	}
4120 
4121 	return err;
4122 }
4123 
4124 static const struct got_error *
4125 cmd_diff(int argc, char *argv[])
4126 {
4127 	const struct got_error *error = NULL;
4128 	struct got_repository *repo = NULL;
4129 	struct got_worktree *worktree = NULL;
4130 	struct got_object_id *id1 = NULL, *id2 = NULL;
4131 	char *repo_path = NULL, *cwd = NULL;
4132 	char *id_str1 = NULL, *id_str2 = NULL;
4133 	char *label1 = NULL, *label2 = NULL;
4134 	int diff_context = 3, ignore_whitespace = 0;
4135 	int ch, force_text_diff = 0;
4136 	const char *errstr;
4137 	struct tog_view *view;
4138 	int *pack_fds = NULL;
4139 
4140 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4141 		switch (ch) {
4142 		case 'a':
4143 			force_text_diff = 1;
4144 			break;
4145 		case 'C':
4146 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4147 			    &errstr);
4148 			if (errstr != NULL)
4149 				errx(1, "number of context lines is %s: %s",
4150 				    errstr, errstr);
4151 			break;
4152 		case 'r':
4153 			repo_path = realpath(optarg, NULL);
4154 			if (repo_path == NULL)
4155 				return got_error_from_errno2("realpath",
4156 				    optarg);
4157 			got_path_strip_trailing_slashes(repo_path);
4158 			break;
4159 		case 'w':
4160 			ignore_whitespace = 1;
4161 			break;
4162 		default:
4163 			usage_diff();
4164 			/* NOTREACHED */
4165 		}
4166 	}
4167 
4168 	argc -= optind;
4169 	argv += optind;
4170 
4171 	if (argc == 0) {
4172 		usage_diff(); /* TODO show local worktree changes */
4173 	} else if (argc == 2) {
4174 		id_str1 = argv[0];
4175 		id_str2 = argv[1];
4176 	} else
4177 		usage_diff();
4178 
4179 	error = got_repo_pack_fds_open(&pack_fds);
4180 	if (error)
4181 		goto done;
4182 
4183 	if (repo_path == NULL) {
4184 		cwd = getcwd(NULL, 0);
4185 		if (cwd == NULL)
4186 			return got_error_from_errno("getcwd");
4187 		error = got_worktree_open(&worktree, cwd);
4188 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4189 			goto done;
4190 		if (worktree)
4191 			repo_path =
4192 			    strdup(got_worktree_get_repo_path(worktree));
4193 		else
4194 			repo_path = strdup(cwd);
4195 		if (repo_path == NULL) {
4196 			error = got_error_from_errno("strdup");
4197 			goto done;
4198 		}
4199 	}
4200 
4201 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4202 	if (error)
4203 		goto done;
4204 
4205 	init_curses();
4206 
4207 	error = apply_unveil(got_repo_get_path(repo), NULL);
4208 	if (error)
4209 		goto done;
4210 
4211 	error = tog_load_refs(repo, 0);
4212 	if (error)
4213 		goto done;
4214 
4215 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4216 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4217 	if (error)
4218 		goto done;
4219 
4220 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4221 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4222 	if (error)
4223 		goto done;
4224 
4225 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4226 	if (view == NULL) {
4227 		error = got_error_from_errno("view_open");
4228 		goto done;
4229 	}
4230 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4231 	    ignore_whitespace, force_text_diff, NULL,  repo);
4232 	if (error)
4233 		goto done;
4234 	error = view_loop(view);
4235 done:
4236 	free(label1);
4237 	free(label2);
4238 	free(repo_path);
4239 	free(cwd);
4240 	if (repo) {
4241 		const struct got_error *close_err = got_repo_close(repo);
4242 		if (error == NULL)
4243 			error = close_err;
4244 	}
4245 	if (worktree)
4246 		got_worktree_close(worktree);
4247 	if (pack_fds) {
4248 		const struct got_error *pack_err =
4249 		    got_repo_pack_fds_close(pack_fds);
4250 		if (error == NULL)
4251 			error = pack_err;
4252 	}
4253 	tog_free_refs();
4254 	return error;
4255 }
4256 
4257 __dead static void
4258 usage_blame(void)
4259 {
4260 	endwin();
4261 	fprintf(stderr,
4262 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4263 	    getprogname());
4264 	exit(1);
4265 }
4266 
4267 struct tog_blame_line {
4268 	int annotated;
4269 	struct got_object_id *id;
4270 };
4271 
4272 static const struct got_error *
4273 draw_blame(struct tog_view *view)
4274 {
4275 	struct tog_blame_view_state *s = &view->state.blame;
4276 	struct tog_blame *blame = &s->blame;
4277 	regmatch_t *regmatch = &view->regmatch;
4278 	const struct got_error *err;
4279 	int lineno = 0, nprinted = 0;
4280 	char *line = NULL;
4281 	size_t linesize = 0;
4282 	ssize_t linelen;
4283 	wchar_t *wline;
4284 	int width;
4285 	struct tog_blame_line *blame_line;
4286 	struct got_object_id *prev_id = NULL;
4287 	char *id_str;
4288 	struct tog_color *tc;
4289 
4290 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4291 	if (err)
4292 		return err;
4293 
4294 	rewind(blame->f);
4295 	werase(view->window);
4296 
4297 	if (asprintf(&line, "commit %s", id_str) == -1) {
4298 		err = got_error_from_errno("asprintf");
4299 		free(id_str);
4300 		return err;
4301 	}
4302 
4303 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4304 	free(line);
4305 	line = NULL;
4306 	if (err)
4307 		return err;
4308 	if (view_needs_focus_indication(view))
4309 		wstandout(view->window);
4310 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4311 	if (tc)
4312 		wattr_on(view->window,
4313 		    COLOR_PAIR(tc->colorpair), NULL);
4314 	waddwstr(view->window, wline);
4315 	if (tc)
4316 		wattr_off(view->window,
4317 		    COLOR_PAIR(tc->colorpair), NULL);
4318 	if (view_needs_focus_indication(view))
4319 		wstandend(view->window);
4320 	free(wline);
4321 	wline = NULL;
4322 	if (width < view->ncols - 1)
4323 		waddch(view->window, '\n');
4324 
4325 	if (asprintf(&line, "[%d/%d] %s%s",
4326 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4327 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4328 		free(id_str);
4329 		return got_error_from_errno("asprintf");
4330 	}
4331 	free(id_str);
4332 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4333 	free(line);
4334 	line = NULL;
4335 	if (err)
4336 		return err;
4337 	waddwstr(view->window, wline);
4338 	free(wline);
4339 	wline = NULL;
4340 	if (width < view->ncols - 1)
4341 		waddch(view->window, '\n');
4342 
4343 	s->eof = 0;
4344 	view->maxx = 0;
4345 	while (nprinted < view->nlines - 2) {
4346 		linelen = getline(&line, &linesize, blame->f);
4347 		if (linelen == -1) {
4348 			if (feof(blame->f)) {
4349 				s->eof = 1;
4350 				break;
4351 			}
4352 			free(line);
4353 			return got_ferror(blame->f, GOT_ERR_IO);
4354 		}
4355 		if (++lineno < s->first_displayed_line)
4356 			continue;
4357 
4358 		if (view->focussed && nprinted == s->selected_line - 1)
4359 			wstandout(view->window);
4360 
4361 		if (blame->nlines > 0) {
4362 			blame_line = &blame->lines[lineno - 1];
4363 			if (blame_line->annotated && prev_id &&
4364 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4365 			    !(view->focussed &&
4366 			    nprinted == s->selected_line - 1)) {
4367 				waddstr(view->window, "        ");
4368 			} else if (blame_line->annotated) {
4369 				char *id_str;
4370 				err = got_object_id_str(&id_str,
4371 				    blame_line->id);
4372 				if (err) {
4373 					free(line);
4374 					return err;
4375 				}
4376 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4377 				if (tc)
4378 					wattr_on(view->window,
4379 					    COLOR_PAIR(tc->colorpair), NULL);
4380 				wprintw(view->window, "%.8s", id_str);
4381 				if (tc)
4382 					wattr_off(view->window,
4383 					    COLOR_PAIR(tc->colorpair), NULL);
4384 				free(id_str);
4385 				prev_id = blame_line->id;
4386 			} else {
4387 				waddstr(view->window, "........");
4388 				prev_id = NULL;
4389 			}
4390 		} else {
4391 			waddstr(view->window, "........");
4392 			prev_id = NULL;
4393 		}
4394 
4395 		if (view->focussed && nprinted == s->selected_line - 1)
4396 			wstandend(view->window);
4397 		waddstr(view->window, " ");
4398 
4399 		if (view->ncols <= 9) {
4400 			width = 9;
4401 			wline = wcsdup(L"");
4402 			if (wline == NULL) {
4403 				err = got_error_from_errno("wcsdup");
4404 				free(line);
4405 				return err;
4406 			}
4407 		} else if (s->first_displayed_line + nprinted ==
4408 		    s->matched_line &&
4409 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4410 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4411 			    view->window, view->x, regmatch);
4412 			if (err) {
4413 				free(line);
4414 				return err;
4415 			}
4416 			view->maxx = MAX(view->maxx, width);
4417 			width += 9;
4418 		} else {
4419 			int skip;
4420 
4421 			/* Set view->maxx based on full line length. */
4422 			err = format_line(&wline, &width, NULL, line,
4423 			    0, INT_MAX, 9, 1);
4424 			if (err) {
4425 				free(line);
4426 				return err;
4427 			}
4428 			view->maxx = MAX(view->maxx, width);
4429 
4430 			/*
4431 			 * Get a new version of the line for display.
4432 			 * This will be scrolled and/or trimmed in length.
4433 			 */
4434 			free(wline);
4435 			err = format_line(&wline, &width, &skip, line,
4436 			    view->x, view->ncols - 9, 9, 1);
4437 			if (err) {
4438 				free(line);
4439 				return err;
4440 			}
4441 			waddwstr(view->window, &wline[skip]);
4442 			width += 9;
4443 			free(wline);
4444 			wline = NULL;
4445 		}
4446 
4447 		if (width <= view->ncols - 1)
4448 			waddch(view->window, '\n');
4449 		if (++nprinted == 1)
4450 			s->first_displayed_line = lineno;
4451 	}
4452 	free(line);
4453 	s->last_displayed_line = lineno;
4454 
4455 	view_vborder(view);
4456 
4457 	return NULL;
4458 }
4459 
4460 static const struct got_error *
4461 blame_cb(void *arg, int nlines, int lineno,
4462     struct got_commit_object *commit, struct got_object_id *id)
4463 {
4464 	const struct got_error *err = NULL;
4465 	struct tog_blame_cb_args *a = arg;
4466 	struct tog_blame_line *line;
4467 	int errcode;
4468 
4469 	if (nlines != a->nlines ||
4470 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4471 		return got_error(GOT_ERR_RANGE);
4472 
4473 	errcode = pthread_mutex_lock(&tog_mutex);
4474 	if (errcode)
4475 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4476 
4477 	if (*a->quit) {	/* user has quit the blame view */
4478 		err = got_error(GOT_ERR_ITER_COMPLETED);
4479 		goto done;
4480 	}
4481 
4482 	if (lineno == -1)
4483 		goto done; /* no change in this commit */
4484 
4485 	line = &a->lines[lineno - 1];
4486 	if (line->annotated)
4487 		goto done;
4488 
4489 	line->id = got_object_id_dup(id);
4490 	if (line->id == NULL) {
4491 		err = got_error_from_errno("got_object_id_dup");
4492 		goto done;
4493 	}
4494 	line->annotated = 1;
4495 done:
4496 	errcode = pthread_mutex_unlock(&tog_mutex);
4497 	if (errcode)
4498 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4499 	return err;
4500 }
4501 
4502 static void *
4503 blame_thread(void *arg)
4504 {
4505 	const struct got_error *err, *close_err;
4506 	struct tog_blame_thread_args *ta = arg;
4507 	struct tog_blame_cb_args *a = ta->cb_args;
4508 	int errcode;
4509 
4510 	err = block_signals_used_by_main_thread();
4511 	if (err)
4512 		return (void *)err;
4513 
4514 	err = got_blame(ta->path, a->commit_id, ta->repo,
4515 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4516 	if (err && err->code == GOT_ERR_CANCELLED)
4517 		err = NULL;
4518 
4519 	errcode = pthread_mutex_lock(&tog_mutex);
4520 	if (errcode)
4521 		return (void *)got_error_set_errno(errcode,
4522 		    "pthread_mutex_lock");
4523 
4524 	close_err = got_repo_close(ta->repo);
4525 	if (err == NULL)
4526 		err = close_err;
4527 	ta->repo = NULL;
4528 	*ta->complete = 1;
4529 
4530 	errcode = pthread_mutex_unlock(&tog_mutex);
4531 	if (errcode && err == NULL)
4532 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4533 
4534 	return (void *)err;
4535 }
4536 
4537 static struct got_object_id *
4538 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4539     int first_displayed_line, int selected_line)
4540 {
4541 	struct tog_blame_line *line;
4542 
4543 	if (nlines <= 0)
4544 		return NULL;
4545 
4546 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4547 	if (!line->annotated)
4548 		return NULL;
4549 
4550 	return line->id;
4551 }
4552 
4553 static const struct got_error *
4554 stop_blame(struct tog_blame *blame)
4555 {
4556 	const struct got_error *err = NULL;
4557 	int i;
4558 
4559 	if (blame->thread) {
4560 		int errcode;
4561 		errcode = pthread_mutex_unlock(&tog_mutex);
4562 		if (errcode)
4563 			return got_error_set_errno(errcode,
4564 			    "pthread_mutex_unlock");
4565 		errcode = pthread_join(blame->thread, (void **)&err);
4566 		if (errcode)
4567 			return got_error_set_errno(errcode, "pthread_join");
4568 		errcode = pthread_mutex_lock(&tog_mutex);
4569 		if (errcode)
4570 			return got_error_set_errno(errcode,
4571 			    "pthread_mutex_lock");
4572 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4573 			err = NULL;
4574 		blame->thread = NULL;
4575 	}
4576 	if (blame->thread_args.repo) {
4577 		const struct got_error *close_err;
4578 		close_err = got_repo_close(blame->thread_args.repo);
4579 		if (err == NULL)
4580 			err = close_err;
4581 		blame->thread_args.repo = NULL;
4582 	}
4583 	if (blame->f) {
4584 		if (fclose(blame->f) == EOF && err == NULL)
4585 			err = got_error_from_errno("fclose");
4586 		blame->f = NULL;
4587 	}
4588 	if (blame->lines) {
4589 		for (i = 0; i < blame->nlines; i++)
4590 			free(blame->lines[i].id);
4591 		free(blame->lines);
4592 		blame->lines = NULL;
4593 	}
4594 	free(blame->cb_args.commit_id);
4595 	blame->cb_args.commit_id = NULL;
4596 	if (blame->pack_fds) {
4597 		const struct got_error *pack_err =
4598 		    got_repo_pack_fds_close(blame->pack_fds);
4599 		if (err == NULL)
4600 			err = pack_err;
4601 		blame->pack_fds = NULL;
4602 	}
4603 	return err;
4604 }
4605 
4606 static const struct got_error *
4607 cancel_blame_view(void *arg)
4608 {
4609 	const struct got_error *err = NULL;
4610 	int *done = arg;
4611 	int errcode;
4612 
4613 	errcode = pthread_mutex_lock(&tog_mutex);
4614 	if (errcode)
4615 		return got_error_set_errno(errcode,
4616 		    "pthread_mutex_unlock");
4617 
4618 	if (*done)
4619 		err = got_error(GOT_ERR_CANCELLED);
4620 
4621 	errcode = pthread_mutex_unlock(&tog_mutex);
4622 	if (errcode)
4623 		return got_error_set_errno(errcode,
4624 		    "pthread_mutex_lock");
4625 
4626 	return err;
4627 }
4628 
4629 static const struct got_error *
4630 run_blame(struct tog_view *view)
4631 {
4632 	struct tog_blame_view_state *s = &view->state.blame;
4633 	struct tog_blame *blame = &s->blame;
4634 	const struct got_error *err = NULL;
4635 	struct got_commit_object *commit = NULL;
4636 	struct got_blob_object *blob = NULL;
4637 	struct got_repository *thread_repo = NULL;
4638 	struct got_object_id *obj_id = NULL;
4639 	int obj_type;
4640 	int *pack_fds = NULL;
4641 
4642 	err = got_object_open_as_commit(&commit, s->repo,
4643 	    &s->blamed_commit->id);
4644 	if (err)
4645 		return err;
4646 
4647 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4648 	if (err)
4649 		goto done;
4650 
4651 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4652 	if (err)
4653 		goto done;
4654 
4655 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4656 		err = got_error(GOT_ERR_OBJ_TYPE);
4657 		goto done;
4658 	}
4659 
4660 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4661 	if (err)
4662 		goto done;
4663 	blame->f = got_opentemp();
4664 	if (blame->f == NULL) {
4665 		err = got_error_from_errno("got_opentemp");
4666 		goto done;
4667 	}
4668 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4669 	    &blame->line_offsets, blame->f, blob);
4670 	if (err)
4671 		goto done;
4672 	if (blame->nlines == 0) {
4673 		s->blame_complete = 1;
4674 		goto done;
4675 	}
4676 
4677 	/* Don't include \n at EOF in the blame line count. */
4678 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4679 		blame->nlines--;
4680 
4681 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4682 	if (blame->lines == NULL) {
4683 		err = got_error_from_errno("calloc");
4684 		goto done;
4685 	}
4686 
4687 	err = got_repo_pack_fds_open(&pack_fds);
4688 	if (err)
4689 		goto done;
4690 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4691 	    pack_fds);
4692 	if (err)
4693 		goto done;
4694 
4695 	blame->pack_fds = pack_fds;
4696 	blame->cb_args.view = view;
4697 	blame->cb_args.lines = blame->lines;
4698 	blame->cb_args.nlines = blame->nlines;
4699 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4700 	if (blame->cb_args.commit_id == NULL) {
4701 		err = got_error_from_errno("got_object_id_dup");
4702 		goto done;
4703 	}
4704 	blame->cb_args.quit = &s->done;
4705 
4706 	blame->thread_args.path = s->path;
4707 	blame->thread_args.repo = thread_repo;
4708 	blame->thread_args.cb_args = &blame->cb_args;
4709 	blame->thread_args.complete = &s->blame_complete;
4710 	blame->thread_args.cancel_cb = cancel_blame_view;
4711 	blame->thread_args.cancel_arg = &s->done;
4712 	s->blame_complete = 0;
4713 
4714 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4715 		s->first_displayed_line = 1;
4716 		s->last_displayed_line = view->nlines;
4717 		s->selected_line = 1;
4718 	}
4719 	s->matched_line = 0;
4720 
4721 done:
4722 	if (commit)
4723 		got_object_commit_close(commit);
4724 	if (blob)
4725 		got_object_blob_close(blob);
4726 	free(obj_id);
4727 	if (err)
4728 		stop_blame(blame);
4729 	return err;
4730 }
4731 
4732 static const struct got_error *
4733 open_blame_view(struct tog_view *view, char *path,
4734     struct got_object_id *commit_id, struct got_repository *repo)
4735 {
4736 	const struct got_error *err = NULL;
4737 	struct tog_blame_view_state *s = &view->state.blame;
4738 
4739 	STAILQ_INIT(&s->blamed_commits);
4740 
4741 	s->path = strdup(path);
4742 	if (s->path == NULL)
4743 		return got_error_from_errno("strdup");
4744 
4745 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4746 	if (err) {
4747 		free(s->path);
4748 		return err;
4749 	}
4750 
4751 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4752 	s->first_displayed_line = 1;
4753 	s->last_displayed_line = view->nlines;
4754 	s->selected_line = 1;
4755 	s->blame_complete = 0;
4756 	s->repo = repo;
4757 	s->commit_id = commit_id;
4758 	memset(&s->blame, 0, sizeof(s->blame));
4759 
4760 	STAILQ_INIT(&s->colors);
4761 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4762 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4763 		    get_color_value("TOG_COLOR_COMMIT"));
4764 		if (err)
4765 			return err;
4766 	}
4767 
4768 	view->show = show_blame_view;
4769 	view->input = input_blame_view;
4770 	view->close = close_blame_view;
4771 	view->search_start = search_start_blame_view;
4772 	view->search_next = search_next_blame_view;
4773 
4774 	return run_blame(view);
4775 }
4776 
4777 static const struct got_error *
4778 close_blame_view(struct tog_view *view)
4779 {
4780 	const struct got_error *err = NULL;
4781 	struct tog_blame_view_state *s = &view->state.blame;
4782 
4783 	if (s->blame.thread)
4784 		err = stop_blame(&s->blame);
4785 
4786 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4787 		struct got_object_qid *blamed_commit;
4788 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4789 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4790 		got_object_qid_free(blamed_commit);
4791 	}
4792 
4793 	free(s->path);
4794 	free_colors(&s->colors);
4795 	return err;
4796 }
4797 
4798 static const struct got_error *
4799 search_start_blame_view(struct tog_view *view)
4800 {
4801 	struct tog_blame_view_state *s = &view->state.blame;
4802 
4803 	s->matched_line = 0;
4804 	return NULL;
4805 }
4806 
4807 static const struct got_error *
4808 search_next_blame_view(struct tog_view *view)
4809 {
4810 	struct tog_blame_view_state *s = &view->state.blame;
4811 	const struct got_error *err = NULL;
4812 	int lineno;
4813 	char *exstr = NULL, *line = NULL;
4814 	size_t linesize = 0;
4815 	ssize_t linelen;
4816 
4817 	if (!view->searching) {
4818 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4819 		return NULL;
4820 	}
4821 
4822 	if (s->matched_line) {
4823 		if (view->searching == TOG_SEARCH_FORWARD)
4824 			lineno = s->matched_line + 1;
4825 		else
4826 			lineno = s->matched_line - 1;
4827 	} else
4828 		lineno = s->first_displayed_line - 1 + s->selected_line;
4829 
4830 	while (1) {
4831 		off_t offset;
4832 
4833 		if (lineno <= 0 || lineno > s->blame.nlines) {
4834 			if (s->matched_line == 0) {
4835 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4836 				break;
4837 			}
4838 
4839 			if (view->searching == TOG_SEARCH_FORWARD)
4840 				lineno = 1;
4841 			else
4842 				lineno = s->blame.nlines;
4843 		}
4844 
4845 		offset = s->blame.line_offsets[lineno - 1];
4846 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4847 			free(line);
4848 			return got_error_from_errno("fseeko");
4849 		}
4850 		linelen = getline(&line, &linesize, s->blame.f);
4851 		err = expand_tab(&exstr, line);
4852 		if (err)
4853 			break;
4854 		if (linelen != -1 &&
4855 		    match_line(exstr, &view->regex, 1, &view->regmatch)) {
4856 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
4857 			s->matched_line = lineno;
4858 			break;
4859 		}
4860 		free(exstr);
4861 		exstr = NULL;
4862 		if (view->searching == TOG_SEARCH_FORWARD)
4863 			lineno++;
4864 		else
4865 			lineno--;
4866 	}
4867 	free(line);
4868 	free(exstr);
4869 
4870 	if (s->matched_line) {
4871 		s->first_displayed_line = s->matched_line;
4872 		s->selected_line = 1;
4873 	}
4874 
4875 	return err;
4876 }
4877 
4878 static const struct got_error *
4879 show_blame_view(struct tog_view *view)
4880 {
4881 	const struct got_error *err = NULL;
4882 	struct tog_blame_view_state *s = &view->state.blame;
4883 	int errcode;
4884 
4885 	if (s->blame.thread == NULL && !s->blame_complete) {
4886 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4887 		    &s->blame.thread_args);
4888 		if (errcode)
4889 			return got_error_set_errno(errcode, "pthread_create");
4890 
4891 		halfdelay(1); /* fast refresh while annotating  */
4892 	}
4893 
4894 	if (s->blame_complete)
4895 		halfdelay(10); /* disable fast refresh */
4896 
4897 	err = draw_blame(view);
4898 
4899 	view_vborder(view);
4900 	return err;
4901 }
4902 
4903 static const struct got_error *
4904 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4905 {
4906 	const struct got_error *err = NULL, *thread_err = NULL;
4907 	struct tog_view *diff_view;
4908 	struct tog_blame_view_state *s = &view->state.blame;
4909 	int begin_x = 0, nscroll = view->nlines - 2;
4910 
4911 	switch (ch) {
4912 	case '0':
4913 		view->x = 0;
4914 		break;
4915 	case '$':
4916 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4917 		break;
4918 	case KEY_RIGHT:
4919 	case 'l':
4920 		if (view->x + view->ncols / 3 < view->maxx)
4921 			view->x += 2;  /* move two columns right */
4922 		break;
4923 	case KEY_LEFT:
4924 	case 'h':
4925 		view->x -= MIN(view->x, 2);  /* move two columns back */
4926 		break;
4927 	case 'q':
4928 		s->done = 1;
4929 		break;
4930 	case 'g':
4931 	case KEY_HOME:
4932 		s->selected_line = 1;
4933 		s->first_displayed_line = 1;
4934 		break;
4935 	case 'G':
4936 	case KEY_END:
4937 		if (s->blame.nlines < view->nlines - 2) {
4938 			s->selected_line = s->blame.nlines;
4939 			s->first_displayed_line = 1;
4940 		} else {
4941 			s->selected_line = view->nlines - 2;
4942 			s->first_displayed_line = s->blame.nlines -
4943 			    (view->nlines - 3);
4944 		}
4945 		break;
4946 	case 'k':
4947 	case KEY_UP:
4948 	case CTRL('p'):
4949 		if (s->selected_line > 1)
4950 			s->selected_line--;
4951 		else if (s->selected_line == 1 &&
4952 		    s->first_displayed_line > 1)
4953 			s->first_displayed_line--;
4954 		break;
4955 	case CTRL('u'):
4956 	case 'u':
4957 		nscroll /= 2;
4958 		/* FALL THROUGH */
4959 	case KEY_PPAGE:
4960 	case CTRL('b'):
4961 		if (s->first_displayed_line == 1) {
4962 			s->selected_line = MAX(1, s->selected_line - nscroll);
4963 			break;
4964 		}
4965 		if (s->first_displayed_line > nscroll)
4966 			s->first_displayed_line -= nscroll;
4967 		else
4968 			s->first_displayed_line = 1;
4969 		break;
4970 	case 'j':
4971 	case KEY_DOWN:
4972 	case CTRL('n'):
4973 		if (s->selected_line < view->nlines - 2 &&
4974 		    s->first_displayed_line +
4975 		    s->selected_line <= s->blame.nlines)
4976 			s->selected_line++;
4977 		else if (s->last_displayed_line <
4978 		    s->blame.nlines)
4979 			s->first_displayed_line++;
4980 		break;
4981 	case 'b':
4982 	case 'p': {
4983 		struct got_object_id *id = NULL;
4984 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4985 		    s->first_displayed_line, s->selected_line);
4986 		if (id == NULL)
4987 			break;
4988 		if (ch == 'p') {
4989 			struct got_commit_object *commit, *pcommit;
4990 			struct got_object_qid *pid;
4991 			struct got_object_id *blob_id = NULL;
4992 			int obj_type;
4993 			err = got_object_open_as_commit(&commit,
4994 			    s->repo, id);
4995 			if (err)
4996 				break;
4997 			pid = STAILQ_FIRST(
4998 			    got_object_commit_get_parent_ids(commit));
4999 			if (pid == NULL) {
5000 				got_object_commit_close(commit);
5001 				break;
5002 			}
5003 			/* Check if path history ends here. */
5004 			err = got_object_open_as_commit(&pcommit,
5005 			    s->repo, &pid->id);
5006 			if (err)
5007 				break;
5008 			err = got_object_id_by_path(&blob_id, s->repo,
5009 			    pcommit, s->path);
5010 			got_object_commit_close(pcommit);
5011 			if (err) {
5012 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5013 					err = NULL;
5014 				got_object_commit_close(commit);
5015 				break;
5016 			}
5017 			err = got_object_get_type(&obj_type, s->repo,
5018 			    blob_id);
5019 			free(blob_id);
5020 			/* Can't blame non-blob type objects. */
5021 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5022 				got_object_commit_close(commit);
5023 				break;
5024 			}
5025 			err = got_object_qid_alloc(&s->blamed_commit,
5026 			    &pid->id);
5027 			got_object_commit_close(commit);
5028 		} else {
5029 			if (got_object_id_cmp(id,
5030 			    &s->blamed_commit->id) == 0)
5031 				break;
5032 			err = got_object_qid_alloc(&s->blamed_commit,
5033 			    id);
5034 		}
5035 		if (err)
5036 			break;
5037 		s->done = 1;
5038 		thread_err = stop_blame(&s->blame);
5039 		s->done = 0;
5040 		if (thread_err)
5041 			break;
5042 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5043 		    s->blamed_commit, entry);
5044 		err = run_blame(view);
5045 		if (err)
5046 			break;
5047 		break;
5048 	}
5049 	case 'B': {
5050 		struct got_object_qid *first;
5051 		first = STAILQ_FIRST(&s->blamed_commits);
5052 		if (!got_object_id_cmp(&first->id, s->commit_id))
5053 			break;
5054 		s->done = 1;
5055 		thread_err = stop_blame(&s->blame);
5056 		s->done = 0;
5057 		if (thread_err)
5058 			break;
5059 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5060 		got_object_qid_free(s->blamed_commit);
5061 		s->blamed_commit =
5062 		    STAILQ_FIRST(&s->blamed_commits);
5063 		err = run_blame(view);
5064 		if (err)
5065 			break;
5066 		break;
5067 	}
5068 	case KEY_ENTER:
5069 	case '\r': {
5070 		struct got_object_id *id = NULL;
5071 		struct got_object_qid *pid;
5072 		struct got_commit_object *commit = NULL;
5073 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5074 		    s->first_displayed_line, s->selected_line);
5075 		if (id == NULL)
5076 			break;
5077 		err = got_object_open_as_commit(&commit, s->repo, id);
5078 		if (err)
5079 			break;
5080 		pid = STAILQ_FIRST(
5081 		    got_object_commit_get_parent_ids(commit));
5082 		if (view_is_parent_view(view))
5083 		    begin_x = view_split_begin_x(view->begin_x);
5084 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5085 		if (diff_view == NULL) {
5086 			got_object_commit_close(commit);
5087 			err = got_error_from_errno("view_open");
5088 			break;
5089 		}
5090 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5091 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5092 		got_object_commit_close(commit);
5093 		if (err) {
5094 			view_close(diff_view);
5095 			break;
5096 		}
5097 		view->focussed = 0;
5098 		diff_view->focussed = 1;
5099 		if (view_is_parent_view(view)) {
5100 			err = view_close_child(view);
5101 			if (err)
5102 				break;
5103 			view_set_child(view, diff_view);
5104 			view->focus_child = 1;
5105 		} else
5106 			*new_view = diff_view;
5107 		if (err)
5108 			break;
5109 		break;
5110 	}
5111 	case CTRL('d'):
5112 	case 'd':
5113 		nscroll /= 2;
5114 		/* FALL THROUGH */
5115 	case KEY_NPAGE:
5116 	case CTRL('f'):
5117 	case ' ':
5118 		if (s->last_displayed_line >= s->blame.nlines &&
5119 		    s->selected_line >= MIN(s->blame.nlines,
5120 		    view->nlines - 2)) {
5121 			break;
5122 		}
5123 		if (s->last_displayed_line >= s->blame.nlines &&
5124 		    s->selected_line < view->nlines - 2) {
5125 			s->selected_line +=
5126 			    MIN(nscroll, s->last_displayed_line -
5127 			    s->first_displayed_line - s->selected_line + 1);
5128 		}
5129 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5130 			s->first_displayed_line += nscroll;
5131 		else
5132 			s->first_displayed_line =
5133 			    s->blame.nlines - (view->nlines - 3);
5134 		break;
5135 	case KEY_RESIZE:
5136 		if (s->selected_line > view->nlines - 2) {
5137 			s->selected_line = MIN(s->blame.nlines,
5138 			    view->nlines - 2);
5139 		}
5140 		break;
5141 	default:
5142 		break;
5143 	}
5144 	return thread_err ? thread_err : err;
5145 }
5146 
5147 static const struct got_error *
5148 cmd_blame(int argc, char *argv[])
5149 {
5150 	const struct got_error *error;
5151 	struct got_repository *repo = NULL;
5152 	struct got_worktree *worktree = NULL;
5153 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5154 	char *link_target = NULL;
5155 	struct got_object_id *commit_id = NULL;
5156 	struct got_commit_object *commit = NULL;
5157 	char *commit_id_str = NULL;
5158 	int ch;
5159 	struct tog_view *view;
5160 	int *pack_fds = NULL;
5161 
5162 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5163 		switch (ch) {
5164 		case 'c':
5165 			commit_id_str = optarg;
5166 			break;
5167 		case 'r':
5168 			repo_path = realpath(optarg, NULL);
5169 			if (repo_path == NULL)
5170 				return got_error_from_errno2("realpath",
5171 				    optarg);
5172 			break;
5173 		default:
5174 			usage_blame();
5175 			/* NOTREACHED */
5176 		}
5177 	}
5178 
5179 	argc -= optind;
5180 	argv += optind;
5181 
5182 	if (argc != 1)
5183 		usage_blame();
5184 
5185 	error = got_repo_pack_fds_open(&pack_fds);
5186 	if (error != NULL)
5187 		goto done;
5188 
5189 	if (repo_path == NULL) {
5190 		cwd = getcwd(NULL, 0);
5191 		if (cwd == NULL)
5192 			return got_error_from_errno("getcwd");
5193 		error = got_worktree_open(&worktree, cwd);
5194 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5195 			goto done;
5196 		if (worktree)
5197 			repo_path =
5198 			    strdup(got_worktree_get_repo_path(worktree));
5199 		else
5200 			repo_path = strdup(cwd);
5201 		if (repo_path == NULL) {
5202 			error = got_error_from_errno("strdup");
5203 			goto done;
5204 		}
5205 	}
5206 
5207 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5208 	if (error != NULL)
5209 		goto done;
5210 
5211 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5212 	    worktree);
5213 	if (error)
5214 		goto done;
5215 
5216 	init_curses();
5217 
5218 	error = apply_unveil(got_repo_get_path(repo), NULL);
5219 	if (error)
5220 		goto done;
5221 
5222 	error = tog_load_refs(repo, 0);
5223 	if (error)
5224 		goto done;
5225 
5226 	if (commit_id_str == NULL) {
5227 		struct got_reference *head_ref;
5228 		error = got_ref_open(&head_ref, repo, worktree ?
5229 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5230 		if (error != NULL)
5231 			goto done;
5232 		error = got_ref_resolve(&commit_id, repo, head_ref);
5233 		got_ref_close(head_ref);
5234 	} else {
5235 		error = got_repo_match_object_id(&commit_id, NULL,
5236 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5237 	}
5238 	if (error != NULL)
5239 		goto done;
5240 
5241 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5242 	if (view == NULL) {
5243 		error = got_error_from_errno("view_open");
5244 		goto done;
5245 	}
5246 
5247 	error = got_object_open_as_commit(&commit, repo, commit_id);
5248 	if (error)
5249 		goto done;
5250 
5251 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5252 	    commit, repo);
5253 	if (error)
5254 		goto done;
5255 
5256 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5257 	    commit_id, repo);
5258 	if (error)
5259 		goto done;
5260 	if (worktree) {
5261 		/* Release work tree lock. */
5262 		got_worktree_close(worktree);
5263 		worktree = NULL;
5264 	}
5265 	error = view_loop(view);
5266 done:
5267 	free(repo_path);
5268 	free(in_repo_path);
5269 	free(link_target);
5270 	free(cwd);
5271 	free(commit_id);
5272 	if (commit)
5273 		got_object_commit_close(commit);
5274 	if (worktree)
5275 		got_worktree_close(worktree);
5276 	if (repo) {
5277 		const struct got_error *close_err = got_repo_close(repo);
5278 		if (error == NULL)
5279 			error = close_err;
5280 	}
5281 	if (pack_fds) {
5282 		const struct got_error *pack_err =
5283 		    got_repo_pack_fds_close(pack_fds);
5284 		if (error == NULL)
5285 			error = pack_err;
5286 	}
5287 	tog_free_refs();
5288 	return error;
5289 }
5290 
5291 static const struct got_error *
5292 draw_tree_entries(struct tog_view *view, const char *parent_path)
5293 {
5294 	struct tog_tree_view_state *s = &view->state.tree;
5295 	const struct got_error *err = NULL;
5296 	struct got_tree_entry *te;
5297 	wchar_t *wline;
5298 	struct tog_color *tc;
5299 	int width, n, i, nentries;
5300 	int limit = view->nlines;
5301 
5302 	s->ndisplayed = 0;
5303 
5304 	werase(view->window);
5305 
5306 	if (limit == 0)
5307 		return NULL;
5308 
5309 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5310 	    0, 0);
5311 	if (err)
5312 		return err;
5313 	if (view_needs_focus_indication(view))
5314 		wstandout(view->window);
5315 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5316 	if (tc)
5317 		wattr_on(view->window,
5318 		    COLOR_PAIR(tc->colorpair), NULL);
5319 	waddwstr(view->window, wline);
5320 	if (tc)
5321 		wattr_off(view->window,
5322 		    COLOR_PAIR(tc->colorpair), NULL);
5323 	if (view_needs_focus_indication(view))
5324 		wstandend(view->window);
5325 	free(wline);
5326 	wline = NULL;
5327 	if (width < view->ncols - 1)
5328 		waddch(view->window, '\n');
5329 	if (--limit <= 0)
5330 		return NULL;
5331 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5332 	    0, 0);
5333 	if (err)
5334 		return err;
5335 	waddwstr(view->window, wline);
5336 	free(wline);
5337 	wline = NULL;
5338 	if (width < view->ncols - 1)
5339 		waddch(view->window, '\n');
5340 	if (--limit <= 0)
5341 		return NULL;
5342 	waddch(view->window, '\n');
5343 	if (--limit <= 0)
5344 		return NULL;
5345 
5346 	if (s->first_displayed_entry == NULL) {
5347 		te = got_object_tree_get_first_entry(s->tree);
5348 		if (s->selected == 0) {
5349 			if (view->focussed)
5350 				wstandout(view->window);
5351 			s->selected_entry = NULL;
5352 		}
5353 		waddstr(view->window, "  ..\n");	/* parent directory */
5354 		if (s->selected == 0 && view->focussed)
5355 			wstandend(view->window);
5356 		s->ndisplayed++;
5357 		if (--limit <= 0)
5358 			return NULL;
5359 		n = 1;
5360 	} else {
5361 		n = 0;
5362 		te = s->first_displayed_entry;
5363 	}
5364 
5365 	nentries = got_object_tree_get_nentries(s->tree);
5366 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5367 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5368 		const char *modestr = "";
5369 		mode_t mode;
5370 
5371 		te = got_object_tree_get_entry(s->tree, i);
5372 		mode = got_tree_entry_get_mode(te);
5373 
5374 		if (s->show_ids) {
5375 			err = got_object_id_str(&id_str,
5376 			    got_tree_entry_get_id(te));
5377 			if (err)
5378 				return got_error_from_errno(
5379 				    "got_object_id_str");
5380 		}
5381 		if (got_object_tree_entry_is_submodule(te))
5382 			modestr = "$";
5383 		else if (S_ISLNK(mode)) {
5384 			int i;
5385 
5386 			err = got_tree_entry_get_symlink_target(&link_target,
5387 			    te, s->repo);
5388 			if (err) {
5389 				free(id_str);
5390 				return err;
5391 			}
5392 			for (i = 0; i < strlen(link_target); i++) {
5393 				if (!isprint((unsigned char)link_target[i]))
5394 					link_target[i] = '?';
5395 			}
5396 			modestr = "@";
5397 		}
5398 		else if (S_ISDIR(mode))
5399 			modestr = "/";
5400 		else if (mode & S_IXUSR)
5401 			modestr = "*";
5402 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5403 		    got_tree_entry_get_name(te), modestr,
5404 		    link_target ? " -> ": "",
5405 		    link_target ? link_target : "") == -1) {
5406 			free(id_str);
5407 			free(link_target);
5408 			return got_error_from_errno("asprintf");
5409 		}
5410 		free(id_str);
5411 		free(link_target);
5412 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5413 		    0, 0);
5414 		if (err) {
5415 			free(line);
5416 			break;
5417 		}
5418 		if (n == s->selected) {
5419 			if (view->focussed)
5420 				wstandout(view->window);
5421 			s->selected_entry = te;
5422 		}
5423 		tc = match_color(&s->colors, line);
5424 		if (tc)
5425 			wattr_on(view->window,
5426 			    COLOR_PAIR(tc->colorpair), NULL);
5427 		waddwstr(view->window, wline);
5428 		if (tc)
5429 			wattr_off(view->window,
5430 			    COLOR_PAIR(tc->colorpair), NULL);
5431 		if (width < view->ncols - 1)
5432 			waddch(view->window, '\n');
5433 		if (n == s->selected && view->focussed)
5434 			wstandend(view->window);
5435 		free(line);
5436 		free(wline);
5437 		wline = NULL;
5438 		n++;
5439 		s->ndisplayed++;
5440 		s->last_displayed_entry = te;
5441 		if (--limit <= 0)
5442 			break;
5443 	}
5444 
5445 	return err;
5446 }
5447 
5448 static void
5449 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5450 {
5451 	struct got_tree_entry *te;
5452 	int isroot = s->tree == s->root;
5453 	int i = 0;
5454 
5455 	if (s->first_displayed_entry == NULL)
5456 		return;
5457 
5458 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5459 	while (i++ < maxscroll) {
5460 		if (te == NULL) {
5461 			if (!isroot)
5462 				s->first_displayed_entry = NULL;
5463 			break;
5464 		}
5465 		s->first_displayed_entry = te;
5466 		te = got_tree_entry_get_prev(s->tree, te);
5467 	}
5468 }
5469 
5470 static void
5471 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5472 {
5473 	struct got_tree_entry *next, *last;
5474 	int n = 0;
5475 
5476 	if (s->first_displayed_entry)
5477 		next = got_tree_entry_get_next(s->tree,
5478 		    s->first_displayed_entry);
5479 	else
5480 		next = got_object_tree_get_first_entry(s->tree);
5481 
5482 	last = s->last_displayed_entry;
5483 	while (next && last && n++ < maxscroll) {
5484 		last = got_tree_entry_get_next(s->tree, last);
5485 		if (last) {
5486 			s->first_displayed_entry = next;
5487 			next = got_tree_entry_get_next(s->tree, next);
5488 		}
5489 	}
5490 }
5491 
5492 static const struct got_error *
5493 tree_entry_path(char **path, struct tog_parent_trees *parents,
5494     struct got_tree_entry *te)
5495 {
5496 	const struct got_error *err = NULL;
5497 	struct tog_parent_tree *pt;
5498 	size_t len = 2; /* for leading slash and NUL */
5499 
5500 	TAILQ_FOREACH(pt, parents, entry)
5501 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5502 		    + 1 /* slash */;
5503 	if (te)
5504 		len += strlen(got_tree_entry_get_name(te));
5505 
5506 	*path = calloc(1, len);
5507 	if (path == NULL)
5508 		return got_error_from_errno("calloc");
5509 
5510 	(*path)[0] = '/';
5511 	pt = TAILQ_LAST(parents, tog_parent_trees);
5512 	while (pt) {
5513 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5514 		if (strlcat(*path, name, len) >= len) {
5515 			err = got_error(GOT_ERR_NO_SPACE);
5516 			goto done;
5517 		}
5518 		if (strlcat(*path, "/", len) >= len) {
5519 			err = got_error(GOT_ERR_NO_SPACE);
5520 			goto done;
5521 		}
5522 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5523 	}
5524 	if (te) {
5525 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5526 			err = got_error(GOT_ERR_NO_SPACE);
5527 			goto done;
5528 		}
5529 	}
5530 done:
5531 	if (err) {
5532 		free(*path);
5533 		*path = NULL;
5534 	}
5535 	return err;
5536 }
5537 
5538 static const struct got_error *
5539 blame_tree_entry(struct tog_view **new_view, int begin_x,
5540     struct got_tree_entry *te, struct tog_parent_trees *parents,
5541     struct got_object_id *commit_id, struct got_repository *repo)
5542 {
5543 	const struct got_error *err = NULL;
5544 	char *path;
5545 	struct tog_view *blame_view;
5546 
5547 	*new_view = NULL;
5548 
5549 	err = tree_entry_path(&path, parents, te);
5550 	if (err)
5551 		return err;
5552 
5553 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5554 	if (blame_view == NULL) {
5555 		err = got_error_from_errno("view_open");
5556 		goto done;
5557 	}
5558 
5559 	err = open_blame_view(blame_view, path, commit_id, repo);
5560 	if (err) {
5561 		if (err->code == GOT_ERR_CANCELLED)
5562 			err = NULL;
5563 		view_close(blame_view);
5564 	} else
5565 		*new_view = blame_view;
5566 done:
5567 	free(path);
5568 	return err;
5569 }
5570 
5571 static const struct got_error *
5572 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5573     struct tog_tree_view_state *s)
5574 {
5575 	struct tog_view *log_view;
5576 	const struct got_error *err = NULL;
5577 	char *path;
5578 
5579 	*new_view = NULL;
5580 
5581 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5582 	if (log_view == NULL)
5583 		return got_error_from_errno("view_open");
5584 
5585 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5586 	if (err)
5587 		return err;
5588 
5589 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5590 	    path, 0);
5591 	if (err)
5592 		view_close(log_view);
5593 	else
5594 		*new_view = log_view;
5595 	free(path);
5596 	return err;
5597 }
5598 
5599 static const struct got_error *
5600 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5601     const char *head_ref_name, struct got_repository *repo)
5602 {
5603 	const struct got_error *err = NULL;
5604 	char *commit_id_str = NULL;
5605 	struct tog_tree_view_state *s = &view->state.tree;
5606 	struct got_commit_object *commit = NULL;
5607 
5608 	TAILQ_INIT(&s->parents);
5609 	STAILQ_INIT(&s->colors);
5610 
5611 	s->commit_id = got_object_id_dup(commit_id);
5612 	if (s->commit_id == NULL)
5613 		return got_error_from_errno("got_object_id_dup");
5614 
5615 	err = got_object_open_as_commit(&commit, repo, commit_id);
5616 	if (err)
5617 		goto done;
5618 
5619 	/*
5620 	 * The root is opened here and will be closed when the view is closed.
5621 	 * Any visited subtrees and their path-wise parents are opened and
5622 	 * closed on demand.
5623 	 */
5624 	err = got_object_open_as_tree(&s->root, repo,
5625 	    got_object_commit_get_tree_id(commit));
5626 	if (err)
5627 		goto done;
5628 	s->tree = s->root;
5629 
5630 	err = got_object_id_str(&commit_id_str, commit_id);
5631 	if (err != NULL)
5632 		goto done;
5633 
5634 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5635 		err = got_error_from_errno("asprintf");
5636 		goto done;
5637 	}
5638 
5639 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5640 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5641 	if (head_ref_name) {
5642 		s->head_ref_name = strdup(head_ref_name);
5643 		if (s->head_ref_name == NULL) {
5644 			err = got_error_from_errno("strdup");
5645 			goto done;
5646 		}
5647 	}
5648 	s->repo = repo;
5649 
5650 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5651 		err = add_color(&s->colors, "\\$$",
5652 		    TOG_COLOR_TREE_SUBMODULE,
5653 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5654 		if (err)
5655 			goto done;
5656 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5657 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5658 		if (err)
5659 			goto done;
5660 		err = add_color(&s->colors, "/$",
5661 		    TOG_COLOR_TREE_DIRECTORY,
5662 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5663 		if (err)
5664 			goto done;
5665 
5666 		err = add_color(&s->colors, "\\*$",
5667 		    TOG_COLOR_TREE_EXECUTABLE,
5668 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5669 		if (err)
5670 			goto done;
5671 
5672 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5673 		    get_color_value("TOG_COLOR_COMMIT"));
5674 		if (err)
5675 			goto done;
5676 	}
5677 
5678 	view->show = show_tree_view;
5679 	view->input = input_tree_view;
5680 	view->close = close_tree_view;
5681 	view->search_start = search_start_tree_view;
5682 	view->search_next = search_next_tree_view;
5683 done:
5684 	free(commit_id_str);
5685 	if (commit)
5686 		got_object_commit_close(commit);
5687 	if (err)
5688 		close_tree_view(view);
5689 	return err;
5690 }
5691 
5692 static const struct got_error *
5693 close_tree_view(struct tog_view *view)
5694 {
5695 	struct tog_tree_view_state *s = &view->state.tree;
5696 
5697 	free_colors(&s->colors);
5698 	free(s->tree_label);
5699 	s->tree_label = NULL;
5700 	free(s->commit_id);
5701 	s->commit_id = NULL;
5702 	free(s->head_ref_name);
5703 	s->head_ref_name = NULL;
5704 	while (!TAILQ_EMPTY(&s->parents)) {
5705 		struct tog_parent_tree *parent;
5706 		parent = TAILQ_FIRST(&s->parents);
5707 		TAILQ_REMOVE(&s->parents, parent, entry);
5708 		if (parent->tree != s->root)
5709 			got_object_tree_close(parent->tree);
5710 		free(parent);
5711 
5712 	}
5713 	if (s->tree != NULL && s->tree != s->root)
5714 		got_object_tree_close(s->tree);
5715 	if (s->root)
5716 		got_object_tree_close(s->root);
5717 	return NULL;
5718 }
5719 
5720 static const struct got_error *
5721 search_start_tree_view(struct tog_view *view)
5722 {
5723 	struct tog_tree_view_state *s = &view->state.tree;
5724 
5725 	s->matched_entry = NULL;
5726 	return NULL;
5727 }
5728 
5729 static int
5730 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5731 {
5732 	regmatch_t regmatch;
5733 
5734 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5735 	    0) == 0;
5736 }
5737 
5738 static const struct got_error *
5739 search_next_tree_view(struct tog_view *view)
5740 {
5741 	struct tog_tree_view_state *s = &view->state.tree;
5742 	struct got_tree_entry *te = NULL;
5743 
5744 	if (!view->searching) {
5745 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5746 		return NULL;
5747 	}
5748 
5749 	if (s->matched_entry) {
5750 		if (view->searching == TOG_SEARCH_FORWARD) {
5751 			if (s->selected_entry)
5752 				te = got_tree_entry_get_next(s->tree,
5753 				    s->selected_entry);
5754 			else
5755 				te = got_object_tree_get_first_entry(s->tree);
5756 		} else {
5757 			if (s->selected_entry == NULL)
5758 				te = got_object_tree_get_last_entry(s->tree);
5759 			else
5760 				te = got_tree_entry_get_prev(s->tree,
5761 				    s->selected_entry);
5762 		}
5763 	} else {
5764 		if (s->selected_entry)
5765 			te = s->selected_entry;
5766 		else if (view->searching == TOG_SEARCH_FORWARD)
5767 			te = got_object_tree_get_first_entry(s->tree);
5768 		else
5769 			te = got_object_tree_get_last_entry(s->tree);
5770 	}
5771 
5772 	while (1) {
5773 		if (te == NULL) {
5774 			if (s->matched_entry == NULL) {
5775 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5776 				return NULL;
5777 			}
5778 			if (view->searching == TOG_SEARCH_FORWARD)
5779 				te = got_object_tree_get_first_entry(s->tree);
5780 			else
5781 				te = got_object_tree_get_last_entry(s->tree);
5782 		}
5783 
5784 		if (match_tree_entry(te, &view->regex)) {
5785 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5786 			s->matched_entry = te;
5787 			break;
5788 		}
5789 
5790 		if (view->searching == TOG_SEARCH_FORWARD)
5791 			te = got_tree_entry_get_next(s->tree, te);
5792 		else
5793 			te = got_tree_entry_get_prev(s->tree, te);
5794 	}
5795 
5796 	if (s->matched_entry) {
5797 		s->first_displayed_entry = s->matched_entry;
5798 		s->selected = 0;
5799 	}
5800 
5801 	return NULL;
5802 }
5803 
5804 static const struct got_error *
5805 show_tree_view(struct tog_view *view)
5806 {
5807 	const struct got_error *err = NULL;
5808 	struct tog_tree_view_state *s = &view->state.tree;
5809 	char *parent_path;
5810 
5811 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5812 	if (err)
5813 		return err;
5814 
5815 	err = draw_tree_entries(view, parent_path);
5816 	free(parent_path);
5817 
5818 	view_vborder(view);
5819 	return err;
5820 }
5821 
5822 static const struct got_error *
5823 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5824 {
5825 	const struct got_error *err = NULL;
5826 	struct tog_tree_view_state *s = &view->state.tree;
5827 	struct tog_view *log_view, *ref_view;
5828 	struct got_tree_entry *te;
5829 	int begin_x = 0, n, nscroll = view->nlines - 3;
5830 
5831 	switch (ch) {
5832 	case 'i':
5833 		s->show_ids = !s->show_ids;
5834 		break;
5835 	case 'l':
5836 		if (!s->selected_entry)
5837 			break;
5838 		if (view_is_parent_view(view))
5839 			begin_x = view_split_begin_x(view->begin_x);
5840 		err = log_selected_tree_entry(&log_view, begin_x, s);
5841 		view->focussed = 0;
5842 		log_view->focussed = 1;
5843 		if (view_is_parent_view(view)) {
5844 			err = view_close_child(view);
5845 			if (err)
5846 				return err;
5847 			view_set_child(view, log_view);
5848 			view->focus_child = 1;
5849 		} else
5850 			*new_view = log_view;
5851 		break;
5852 	case 'r':
5853 		if (view_is_parent_view(view))
5854 			begin_x = view_split_begin_x(view->begin_x);
5855 		ref_view = view_open(view->nlines, view->ncols,
5856 		    view->begin_y, begin_x, TOG_VIEW_REF);
5857 		if (ref_view == NULL)
5858 			return got_error_from_errno("view_open");
5859 		err = open_ref_view(ref_view, s->repo);
5860 		if (err) {
5861 			view_close(ref_view);
5862 			return err;
5863 		}
5864 		view->focussed = 0;
5865 		ref_view->focussed = 1;
5866 		if (view_is_parent_view(view)) {
5867 			err = view_close_child(view);
5868 			if (err)
5869 				return err;
5870 			view_set_child(view, ref_view);
5871 			view->focus_child = 1;
5872 		} else
5873 			*new_view = ref_view;
5874 		break;
5875 	case 'g':
5876 	case KEY_HOME:
5877 		s->selected = 0;
5878 		if (s->tree == s->root)
5879 			s->first_displayed_entry =
5880 			    got_object_tree_get_first_entry(s->tree);
5881 		else
5882 			s->first_displayed_entry = NULL;
5883 		break;
5884 	case 'G':
5885 	case KEY_END:
5886 		s->selected = 0;
5887 		te = got_object_tree_get_last_entry(s->tree);
5888 		for (n = 0; n < view->nlines - 3; n++) {
5889 			if (te == NULL) {
5890 				if(s->tree != s->root) {
5891 					s->first_displayed_entry = NULL;
5892 					n++;
5893 				}
5894 				break;
5895 			}
5896 			s->first_displayed_entry = te;
5897 			te = got_tree_entry_get_prev(s->tree, te);
5898 		}
5899 		if (n > 0)
5900 			s->selected = n - 1;
5901 		break;
5902 	case 'k':
5903 	case KEY_UP:
5904 	case CTRL('p'):
5905 		if (s->selected > 0) {
5906 			s->selected--;
5907 			break;
5908 		}
5909 		tree_scroll_up(s, 1);
5910 		break;
5911 	case CTRL('u'):
5912 	case 'u':
5913 		nscroll /= 2;
5914 		/* FALL THROUGH */
5915 	case KEY_PPAGE:
5916 	case CTRL('b'):
5917 		if (s->tree == s->root) {
5918 			if (got_object_tree_get_first_entry(s->tree) ==
5919 			    s->first_displayed_entry)
5920 				s->selected -= MIN(s->selected, nscroll);
5921 		} else {
5922 			if (s->first_displayed_entry == NULL)
5923 				s->selected -= MIN(s->selected, nscroll);
5924 		}
5925 		tree_scroll_up(s, MAX(0, nscroll));
5926 		break;
5927 	case 'j':
5928 	case KEY_DOWN:
5929 	case CTRL('n'):
5930 		if (s->selected < s->ndisplayed - 1) {
5931 			s->selected++;
5932 			break;
5933 		}
5934 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5935 		    == NULL)
5936 			/* can't scroll any further */
5937 			break;
5938 		tree_scroll_down(s, 1);
5939 		break;
5940 	case CTRL('d'):
5941 	case 'd':
5942 		nscroll /= 2;
5943 		/* FALL THROUGH */
5944 	case KEY_NPAGE:
5945 	case CTRL('f'):
5946 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5947 		    == NULL) {
5948 			/* can't scroll any further; move cursor down */
5949 			if (s->selected < s->ndisplayed - 1)
5950 				s->selected += MIN(nscroll,
5951 				    s->ndisplayed - s->selected - 1);
5952 			break;
5953 		}
5954 		tree_scroll_down(s, nscroll);
5955 		break;
5956 	case KEY_ENTER:
5957 	case '\r':
5958 	case KEY_BACKSPACE:
5959 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5960 			struct tog_parent_tree *parent;
5961 			/* user selected '..' */
5962 			if (s->tree == s->root)
5963 				break;
5964 			parent = TAILQ_FIRST(&s->parents);
5965 			TAILQ_REMOVE(&s->parents, parent,
5966 			    entry);
5967 			got_object_tree_close(s->tree);
5968 			s->tree = parent->tree;
5969 			s->first_displayed_entry =
5970 			    parent->first_displayed_entry;
5971 			s->selected_entry =
5972 			    parent->selected_entry;
5973 			s->selected = parent->selected;
5974 			free(parent);
5975 		} else if (S_ISDIR(got_tree_entry_get_mode(
5976 		    s->selected_entry))) {
5977 			struct got_tree_object *subtree;
5978 			err = got_object_open_as_tree(&subtree, s->repo,
5979 			    got_tree_entry_get_id(s->selected_entry));
5980 			if (err)
5981 				break;
5982 			err = tree_view_visit_subtree(s, subtree);
5983 			if (err) {
5984 				got_object_tree_close(subtree);
5985 				break;
5986 			}
5987 		} else if (S_ISREG(got_tree_entry_get_mode(
5988 		    s->selected_entry))) {
5989 			struct tog_view *blame_view;
5990 			int begin_x = view_is_parent_view(view) ?
5991 			    view_split_begin_x(view->begin_x) : 0;
5992 
5993 			err = blame_tree_entry(&blame_view, begin_x,
5994 			    s->selected_entry, &s->parents,
5995 			    s->commit_id, s->repo);
5996 			if (err)
5997 				break;
5998 			view->focussed = 0;
5999 			blame_view->focussed = 1;
6000 			if (view_is_parent_view(view)) {
6001 				err = view_close_child(view);
6002 				if (err)
6003 					return err;
6004 				view_set_child(view, blame_view);
6005 				view->focus_child = 1;
6006 			} else
6007 				*new_view = blame_view;
6008 		}
6009 		break;
6010 	case KEY_RESIZE:
6011 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6012 			s->selected = view->nlines - 4;
6013 		break;
6014 	default:
6015 		break;
6016 	}
6017 
6018 	return err;
6019 }
6020 
6021 __dead static void
6022 usage_tree(void)
6023 {
6024 	endwin();
6025 	fprintf(stderr,
6026 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6027 	    getprogname());
6028 	exit(1);
6029 }
6030 
6031 static const struct got_error *
6032 cmd_tree(int argc, char *argv[])
6033 {
6034 	const struct got_error *error;
6035 	struct got_repository *repo = NULL;
6036 	struct got_worktree *worktree = NULL;
6037 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6038 	struct got_object_id *commit_id = NULL;
6039 	struct got_commit_object *commit = NULL;
6040 	const char *commit_id_arg = NULL;
6041 	char *label = NULL;
6042 	struct got_reference *ref = NULL;
6043 	const char *head_ref_name = NULL;
6044 	int ch;
6045 	struct tog_view *view;
6046 	int *pack_fds = NULL;
6047 
6048 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6049 		switch (ch) {
6050 		case 'c':
6051 			commit_id_arg = optarg;
6052 			break;
6053 		case 'r':
6054 			repo_path = realpath(optarg, NULL);
6055 			if (repo_path == NULL)
6056 				return got_error_from_errno2("realpath",
6057 				    optarg);
6058 			break;
6059 		default:
6060 			usage_tree();
6061 			/* NOTREACHED */
6062 		}
6063 	}
6064 
6065 	argc -= optind;
6066 	argv += optind;
6067 
6068 	if (argc > 1)
6069 		usage_tree();
6070 
6071 	error = got_repo_pack_fds_open(&pack_fds);
6072 	if (error != NULL)
6073 		goto done;
6074 
6075 	if (repo_path == NULL) {
6076 		cwd = getcwd(NULL, 0);
6077 		if (cwd == NULL)
6078 			return got_error_from_errno("getcwd");
6079 		error = got_worktree_open(&worktree, cwd);
6080 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6081 			goto done;
6082 		if (worktree)
6083 			repo_path =
6084 			    strdup(got_worktree_get_repo_path(worktree));
6085 		else
6086 			repo_path = strdup(cwd);
6087 		if (repo_path == NULL) {
6088 			error = got_error_from_errno("strdup");
6089 			goto done;
6090 		}
6091 	}
6092 
6093 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6094 	if (error != NULL)
6095 		goto done;
6096 
6097 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6098 	    repo, worktree);
6099 	if (error)
6100 		goto done;
6101 
6102 	init_curses();
6103 
6104 	error = apply_unveil(got_repo_get_path(repo), NULL);
6105 	if (error)
6106 		goto done;
6107 
6108 	error = tog_load_refs(repo, 0);
6109 	if (error)
6110 		goto done;
6111 
6112 	if (commit_id_arg == NULL) {
6113 		error = got_repo_match_object_id(&commit_id, &label,
6114 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6115 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6116 		if (error)
6117 			goto done;
6118 		head_ref_name = label;
6119 	} else {
6120 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6121 		if (error == NULL)
6122 			head_ref_name = got_ref_get_name(ref);
6123 		else if (error->code != GOT_ERR_NOT_REF)
6124 			goto done;
6125 		error = got_repo_match_object_id(&commit_id, NULL,
6126 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6127 		if (error)
6128 			goto done;
6129 	}
6130 
6131 	error = got_object_open_as_commit(&commit, repo, commit_id);
6132 	if (error)
6133 		goto done;
6134 
6135 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6136 	if (view == NULL) {
6137 		error = got_error_from_errno("view_open");
6138 		goto done;
6139 	}
6140 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6141 	if (error)
6142 		goto done;
6143 	if (!got_path_is_root_dir(in_repo_path)) {
6144 		error = tree_view_walk_path(&view->state.tree, commit,
6145 		    in_repo_path);
6146 		if (error)
6147 			goto done;
6148 	}
6149 
6150 	if (worktree) {
6151 		/* Release work tree lock. */
6152 		got_worktree_close(worktree);
6153 		worktree = NULL;
6154 	}
6155 	error = view_loop(view);
6156 done:
6157 	free(repo_path);
6158 	free(cwd);
6159 	free(commit_id);
6160 	free(label);
6161 	if (ref)
6162 		got_ref_close(ref);
6163 	if (repo) {
6164 		const struct got_error *close_err = got_repo_close(repo);
6165 		if (error == NULL)
6166 			error = close_err;
6167 	}
6168 	if (pack_fds) {
6169 		const struct got_error *pack_err =
6170 		    got_repo_pack_fds_close(pack_fds);
6171 		if (error == NULL)
6172 			error = pack_err;
6173 	}
6174 	tog_free_refs();
6175 	return error;
6176 }
6177 
6178 static const struct got_error *
6179 ref_view_load_refs(struct tog_ref_view_state *s)
6180 {
6181 	struct got_reflist_entry *sre;
6182 	struct tog_reflist_entry *re;
6183 
6184 	s->nrefs = 0;
6185 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6186 		if (strncmp(got_ref_get_name(sre->ref),
6187 		    "refs/got/", 9) == 0 &&
6188 		    strncmp(got_ref_get_name(sre->ref),
6189 		    "refs/got/backup/", 16) != 0)
6190 			continue;
6191 
6192 		re = malloc(sizeof(*re));
6193 		if (re == NULL)
6194 			return got_error_from_errno("malloc");
6195 
6196 		re->ref = got_ref_dup(sre->ref);
6197 		if (re->ref == NULL)
6198 			return got_error_from_errno("got_ref_dup");
6199 		re->idx = s->nrefs++;
6200 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6201 	}
6202 
6203 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6204 	return NULL;
6205 }
6206 
6207 void
6208 ref_view_free_refs(struct tog_ref_view_state *s)
6209 {
6210 	struct tog_reflist_entry *re;
6211 
6212 	while (!TAILQ_EMPTY(&s->refs)) {
6213 		re = TAILQ_FIRST(&s->refs);
6214 		TAILQ_REMOVE(&s->refs, re, entry);
6215 		got_ref_close(re->ref);
6216 		free(re);
6217 	}
6218 }
6219 
6220 static const struct got_error *
6221 open_ref_view(struct tog_view *view, struct got_repository *repo)
6222 {
6223 	const struct got_error *err = NULL;
6224 	struct tog_ref_view_state *s = &view->state.ref;
6225 
6226 	s->selected_entry = 0;
6227 	s->repo = repo;
6228 
6229 	TAILQ_INIT(&s->refs);
6230 	STAILQ_INIT(&s->colors);
6231 
6232 	err = ref_view_load_refs(s);
6233 	if (err)
6234 		return err;
6235 
6236 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6237 		err = add_color(&s->colors, "^refs/heads/",
6238 		    TOG_COLOR_REFS_HEADS,
6239 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6240 		if (err)
6241 			goto done;
6242 
6243 		err = add_color(&s->colors, "^refs/tags/",
6244 		    TOG_COLOR_REFS_TAGS,
6245 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6246 		if (err)
6247 			goto done;
6248 
6249 		err = add_color(&s->colors, "^refs/remotes/",
6250 		    TOG_COLOR_REFS_REMOTES,
6251 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6252 		if (err)
6253 			goto done;
6254 
6255 		err = add_color(&s->colors, "^refs/got/backup/",
6256 		    TOG_COLOR_REFS_BACKUP,
6257 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6258 		if (err)
6259 			goto done;
6260 	}
6261 
6262 	view->show = show_ref_view;
6263 	view->input = input_ref_view;
6264 	view->close = close_ref_view;
6265 	view->search_start = search_start_ref_view;
6266 	view->search_next = search_next_ref_view;
6267 done:
6268 	if (err)
6269 		free_colors(&s->colors);
6270 	return err;
6271 }
6272 
6273 static const struct got_error *
6274 close_ref_view(struct tog_view *view)
6275 {
6276 	struct tog_ref_view_state *s = &view->state.ref;
6277 
6278 	ref_view_free_refs(s);
6279 	free_colors(&s->colors);
6280 
6281 	return NULL;
6282 }
6283 
6284 static const struct got_error *
6285 resolve_reflist_entry(struct got_object_id **commit_id,
6286     struct tog_reflist_entry *re, struct got_repository *repo)
6287 {
6288 	const struct got_error *err = NULL;
6289 	struct got_object_id *obj_id;
6290 	struct got_tag_object *tag = NULL;
6291 	int obj_type;
6292 
6293 	*commit_id = NULL;
6294 
6295 	err = got_ref_resolve(&obj_id, repo, re->ref);
6296 	if (err)
6297 		return err;
6298 
6299 	err = got_object_get_type(&obj_type, repo, obj_id);
6300 	if (err)
6301 		goto done;
6302 
6303 	switch (obj_type) {
6304 	case GOT_OBJ_TYPE_COMMIT:
6305 		*commit_id = obj_id;
6306 		break;
6307 	case GOT_OBJ_TYPE_TAG:
6308 		err = got_object_open_as_tag(&tag, repo, obj_id);
6309 		if (err)
6310 			goto done;
6311 		free(obj_id);
6312 		err = got_object_get_type(&obj_type, repo,
6313 		    got_object_tag_get_object_id(tag));
6314 		if (err)
6315 			goto done;
6316 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6317 			err = got_error(GOT_ERR_OBJ_TYPE);
6318 			goto done;
6319 		}
6320 		*commit_id = got_object_id_dup(
6321 		    got_object_tag_get_object_id(tag));
6322 		if (*commit_id == NULL) {
6323 			err = got_error_from_errno("got_object_id_dup");
6324 			goto done;
6325 		}
6326 		break;
6327 	default:
6328 		err = got_error(GOT_ERR_OBJ_TYPE);
6329 		break;
6330 	}
6331 
6332 done:
6333 	if (tag)
6334 		got_object_tag_close(tag);
6335 	if (err) {
6336 		free(*commit_id);
6337 		*commit_id = NULL;
6338 	}
6339 	return err;
6340 }
6341 
6342 static const struct got_error *
6343 log_ref_entry(struct tog_view **new_view, int begin_x,
6344     struct tog_reflist_entry *re, struct got_repository *repo)
6345 {
6346 	struct tog_view *log_view;
6347 	const struct got_error *err = NULL;
6348 	struct got_object_id *commit_id = NULL;
6349 
6350 	*new_view = NULL;
6351 
6352 	err = resolve_reflist_entry(&commit_id, re, repo);
6353 	if (err) {
6354 		if (err->code != GOT_ERR_OBJ_TYPE)
6355 			return err;
6356 		else
6357 			return NULL;
6358 	}
6359 
6360 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6361 	if (log_view == NULL) {
6362 		err = got_error_from_errno("view_open");
6363 		goto done;
6364 	}
6365 
6366 	err = open_log_view(log_view, commit_id, repo,
6367 	    got_ref_get_name(re->ref), "", 0);
6368 done:
6369 	if (err)
6370 		view_close(log_view);
6371 	else
6372 		*new_view = log_view;
6373 	free(commit_id);
6374 	return err;
6375 }
6376 
6377 static void
6378 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6379 {
6380 	struct tog_reflist_entry *re;
6381 	int i = 0;
6382 
6383 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6384 		return;
6385 
6386 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6387 	while (i++ < maxscroll) {
6388 		if (re == NULL)
6389 			break;
6390 		s->first_displayed_entry = re;
6391 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6392 	}
6393 }
6394 
6395 static void
6396 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6397 {
6398 	struct tog_reflist_entry *next, *last;
6399 	int n = 0;
6400 
6401 	if (s->first_displayed_entry)
6402 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6403 	else
6404 		next = TAILQ_FIRST(&s->refs);
6405 
6406 	last = s->last_displayed_entry;
6407 	while (next && last && n++ < maxscroll) {
6408 		last = TAILQ_NEXT(last, entry);
6409 		if (last) {
6410 			s->first_displayed_entry = next;
6411 			next = TAILQ_NEXT(next, entry);
6412 		}
6413 	}
6414 }
6415 
6416 static const struct got_error *
6417 search_start_ref_view(struct tog_view *view)
6418 {
6419 	struct tog_ref_view_state *s = &view->state.ref;
6420 
6421 	s->matched_entry = NULL;
6422 	return NULL;
6423 }
6424 
6425 static int
6426 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6427 {
6428 	regmatch_t regmatch;
6429 
6430 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6431 	    0) == 0;
6432 }
6433 
6434 static const struct got_error *
6435 search_next_ref_view(struct tog_view *view)
6436 {
6437 	struct tog_ref_view_state *s = &view->state.ref;
6438 	struct tog_reflist_entry *re = NULL;
6439 
6440 	if (!view->searching) {
6441 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6442 		return NULL;
6443 	}
6444 
6445 	if (s->matched_entry) {
6446 		if (view->searching == TOG_SEARCH_FORWARD) {
6447 			if (s->selected_entry)
6448 				re = TAILQ_NEXT(s->selected_entry, entry);
6449 			else
6450 				re = TAILQ_PREV(s->selected_entry,
6451 				    tog_reflist_head, entry);
6452 		} else {
6453 			if (s->selected_entry == NULL)
6454 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6455 			else
6456 				re = TAILQ_PREV(s->selected_entry,
6457 				    tog_reflist_head, entry);
6458 		}
6459 	} else {
6460 		if (s->selected_entry)
6461 			re = s->selected_entry;
6462 		else if (view->searching == TOG_SEARCH_FORWARD)
6463 			re = TAILQ_FIRST(&s->refs);
6464 		else
6465 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6466 	}
6467 
6468 	while (1) {
6469 		if (re == NULL) {
6470 			if (s->matched_entry == NULL) {
6471 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6472 				return NULL;
6473 			}
6474 			if (view->searching == TOG_SEARCH_FORWARD)
6475 				re = TAILQ_FIRST(&s->refs);
6476 			else
6477 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6478 		}
6479 
6480 		if (match_reflist_entry(re, &view->regex)) {
6481 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6482 			s->matched_entry = re;
6483 			break;
6484 		}
6485 
6486 		if (view->searching == TOG_SEARCH_FORWARD)
6487 			re = TAILQ_NEXT(re, entry);
6488 		else
6489 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6490 	}
6491 
6492 	if (s->matched_entry) {
6493 		s->first_displayed_entry = s->matched_entry;
6494 		s->selected = 0;
6495 	}
6496 
6497 	return NULL;
6498 }
6499 
6500 static const struct got_error *
6501 show_ref_view(struct tog_view *view)
6502 {
6503 	const struct got_error *err = NULL;
6504 	struct tog_ref_view_state *s = &view->state.ref;
6505 	struct tog_reflist_entry *re;
6506 	char *line = NULL;
6507 	wchar_t *wline;
6508 	struct tog_color *tc;
6509 	int width, n;
6510 	int limit = view->nlines;
6511 
6512 	werase(view->window);
6513 
6514 	s->ndisplayed = 0;
6515 
6516 	if (limit == 0)
6517 		return NULL;
6518 
6519 	re = s->first_displayed_entry;
6520 
6521 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6522 	    s->nrefs) == -1)
6523 		return got_error_from_errno("asprintf");
6524 
6525 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6526 	if (err) {
6527 		free(line);
6528 		return err;
6529 	}
6530 	if (view_needs_focus_indication(view))
6531 		wstandout(view->window);
6532 	waddwstr(view->window, wline);
6533 	if (view_needs_focus_indication(view))
6534 		wstandend(view->window);
6535 	free(wline);
6536 	wline = NULL;
6537 	free(line);
6538 	line = NULL;
6539 	if (width < view->ncols - 1)
6540 		waddch(view->window, '\n');
6541 	if (--limit <= 0)
6542 		return NULL;
6543 
6544 	n = 0;
6545 	while (re && limit > 0) {
6546 		char *line = NULL;
6547 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6548 
6549 		if (s->show_date) {
6550 			struct got_commit_object *ci;
6551 			struct got_tag_object *tag;
6552 			struct got_object_id *id;
6553 			struct tm tm;
6554 			time_t t;
6555 
6556 			err = got_ref_resolve(&id, s->repo, re->ref);
6557 			if (err)
6558 				return err;
6559 			err = got_object_open_as_tag(&tag, s->repo, id);
6560 			if (err) {
6561 				if (err->code != GOT_ERR_OBJ_TYPE) {
6562 					free(id);
6563 					return err;
6564 				}
6565 				err = got_object_open_as_commit(&ci, s->repo,
6566 				    id);
6567 				if (err) {
6568 					free(id);
6569 					return err;
6570 				}
6571 				t = got_object_commit_get_committer_time(ci);
6572 				got_object_commit_close(ci);
6573 			} else {
6574 				t = got_object_tag_get_tagger_time(tag);
6575 				got_object_tag_close(tag);
6576 			}
6577 			free(id);
6578 			if (gmtime_r(&t, &tm) == NULL)
6579 				return got_error_from_errno("gmtime_r");
6580 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6581 				return got_error(GOT_ERR_NO_SPACE);
6582 		}
6583 		if (got_ref_is_symbolic(re->ref)) {
6584 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6585 			    ymd : "", got_ref_get_name(re->ref),
6586 			    got_ref_get_symref_target(re->ref)) == -1)
6587 				return got_error_from_errno("asprintf");
6588 		} else if (s->show_ids) {
6589 			struct got_object_id *id;
6590 			char *id_str;
6591 			err = got_ref_resolve(&id, s->repo, re->ref);
6592 			if (err)
6593 				return err;
6594 			err = got_object_id_str(&id_str, id);
6595 			if (err) {
6596 				free(id);
6597 				return err;
6598 			}
6599 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6600 			    got_ref_get_name(re->ref), id_str) == -1) {
6601 				err = got_error_from_errno("asprintf");
6602 				free(id);
6603 				free(id_str);
6604 				return err;
6605 			}
6606 			free(id);
6607 			free(id_str);
6608 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6609 		    got_ref_get_name(re->ref)) == -1)
6610 			return got_error_from_errno("asprintf");
6611 
6612 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6613 		    0, 0);
6614 		if (err) {
6615 			free(line);
6616 			return err;
6617 		}
6618 		if (n == s->selected) {
6619 			if (view->focussed)
6620 				wstandout(view->window);
6621 			s->selected_entry = re;
6622 		}
6623 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6624 		if (tc)
6625 			wattr_on(view->window,
6626 			    COLOR_PAIR(tc->colorpair), NULL);
6627 		waddwstr(view->window, wline);
6628 		if (tc)
6629 			wattr_off(view->window,
6630 			    COLOR_PAIR(tc->colorpair), NULL);
6631 		if (width < view->ncols - 1)
6632 			waddch(view->window, '\n');
6633 		if (n == s->selected && view->focussed)
6634 			wstandend(view->window);
6635 		free(line);
6636 		free(wline);
6637 		wline = NULL;
6638 		n++;
6639 		s->ndisplayed++;
6640 		s->last_displayed_entry = re;
6641 
6642 		limit--;
6643 		re = TAILQ_NEXT(re, entry);
6644 	}
6645 
6646 	view_vborder(view);
6647 	return err;
6648 }
6649 
6650 static const struct got_error *
6651 browse_ref_tree(struct tog_view **new_view, int begin_x,
6652     struct tog_reflist_entry *re, struct got_repository *repo)
6653 {
6654 	const struct got_error *err = NULL;
6655 	struct got_object_id *commit_id = NULL;
6656 	struct tog_view *tree_view;
6657 
6658 	*new_view = NULL;
6659 
6660 	err = resolve_reflist_entry(&commit_id, re, repo);
6661 	if (err) {
6662 		if (err->code != GOT_ERR_OBJ_TYPE)
6663 			return err;
6664 		else
6665 			return NULL;
6666 	}
6667 
6668 
6669 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6670 	if (tree_view == NULL) {
6671 		err = got_error_from_errno("view_open");
6672 		goto done;
6673 	}
6674 
6675 	err = open_tree_view(tree_view, commit_id,
6676 	    got_ref_get_name(re->ref), repo);
6677 	if (err)
6678 		goto done;
6679 
6680 	*new_view = tree_view;
6681 done:
6682 	free(commit_id);
6683 	return err;
6684 }
6685 static const struct got_error *
6686 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6687 {
6688 	const struct got_error *err = NULL;
6689 	struct tog_ref_view_state *s = &view->state.ref;
6690 	struct tog_view *log_view, *tree_view;
6691 	struct tog_reflist_entry *re;
6692 	int begin_x = 0, n, nscroll = view->nlines - 1;
6693 
6694 	switch (ch) {
6695 	case 'i':
6696 		s->show_ids = !s->show_ids;
6697 		break;
6698 	case 'm':
6699 		s->show_date = !s->show_date;
6700 		break;
6701 	case 'o':
6702 		s->sort_by_date = !s->sort_by_date;
6703 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6704 		    got_ref_cmp_by_commit_timestamp_descending :
6705 		    tog_ref_cmp_by_name, s->repo);
6706 		if (err)
6707 			break;
6708 		got_reflist_object_id_map_free(tog_refs_idmap);
6709 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6710 		    &tog_refs, s->repo);
6711 		if (err)
6712 			break;
6713 		ref_view_free_refs(s);
6714 		err = ref_view_load_refs(s);
6715 		break;
6716 	case KEY_ENTER:
6717 	case '\r':
6718 		if (!s->selected_entry)
6719 			break;
6720 		if (view_is_parent_view(view))
6721 			begin_x = view_split_begin_x(view->begin_x);
6722 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6723 		    s->repo);
6724 		view->focussed = 0;
6725 		log_view->focussed = 1;
6726 		if (view_is_parent_view(view)) {
6727 			err = view_close_child(view);
6728 			if (err)
6729 				return err;
6730 			view_set_child(view, log_view);
6731 			view->focus_child = 1;
6732 		} else
6733 			*new_view = log_view;
6734 		break;
6735 	case 't':
6736 		if (!s->selected_entry)
6737 			break;
6738 		if (view_is_parent_view(view))
6739 			begin_x = view_split_begin_x(view->begin_x);
6740 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6741 		    s->repo);
6742 		if (err || tree_view == NULL)
6743 			break;
6744 		view->focussed = 0;
6745 		tree_view->focussed = 1;
6746 		if (view_is_parent_view(view)) {
6747 			err = view_close_child(view);
6748 			if (err)
6749 				return err;
6750 			view_set_child(view, tree_view);
6751 			view->focus_child = 1;
6752 		} else
6753 			*new_view = tree_view;
6754 		break;
6755 	case 'g':
6756 	case KEY_HOME:
6757 		s->selected = 0;
6758 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6759 		break;
6760 	case 'G':
6761 	case KEY_END:
6762 		s->selected = 0;
6763 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6764 		for (n = 0; n < view->nlines - 1; n++) {
6765 			if (re == NULL)
6766 				break;
6767 			s->first_displayed_entry = re;
6768 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6769 		}
6770 		if (n > 0)
6771 			s->selected = n - 1;
6772 		break;
6773 	case 'k':
6774 	case KEY_UP:
6775 	case CTRL('p'):
6776 		if (s->selected > 0) {
6777 			s->selected--;
6778 			break;
6779 		}
6780 		ref_scroll_up(s, 1);
6781 		break;
6782 	case CTRL('u'):
6783 	case 'u':
6784 		nscroll /= 2;
6785 		/* FALL THROUGH */
6786 	case KEY_PPAGE:
6787 	case CTRL('b'):
6788 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6789 			s->selected -= MIN(nscroll, s->selected);
6790 		ref_scroll_up(s, MAX(0, nscroll));
6791 		break;
6792 	case 'j':
6793 	case KEY_DOWN:
6794 	case CTRL('n'):
6795 		if (s->selected < s->ndisplayed - 1) {
6796 			s->selected++;
6797 			break;
6798 		}
6799 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6800 			/* can't scroll any further */
6801 			break;
6802 		ref_scroll_down(s, 1);
6803 		break;
6804 	case CTRL('d'):
6805 	case 'd':
6806 		nscroll /= 2;
6807 		/* FALL THROUGH */
6808 	case KEY_NPAGE:
6809 	case CTRL('f'):
6810 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6811 			/* can't scroll any further; move cursor down */
6812 			if (s->selected < s->ndisplayed - 1)
6813 				s->selected += MIN(nscroll,
6814 				    s->ndisplayed - s->selected - 1);
6815 			break;
6816 		}
6817 		ref_scroll_down(s, nscroll);
6818 		break;
6819 	case CTRL('l'):
6820 		tog_free_refs();
6821 		err = tog_load_refs(s->repo, s->sort_by_date);
6822 		if (err)
6823 			break;
6824 		ref_view_free_refs(s);
6825 		err = ref_view_load_refs(s);
6826 		break;
6827 	case KEY_RESIZE:
6828 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6829 			s->selected = view->nlines - 2;
6830 		break;
6831 	default:
6832 		break;
6833 	}
6834 
6835 	return err;
6836 }
6837 
6838 __dead static void
6839 usage_ref(void)
6840 {
6841 	endwin();
6842 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6843 	    getprogname());
6844 	exit(1);
6845 }
6846 
6847 static const struct got_error *
6848 cmd_ref(int argc, char *argv[])
6849 {
6850 	const struct got_error *error;
6851 	struct got_repository *repo = NULL;
6852 	struct got_worktree *worktree = NULL;
6853 	char *cwd = NULL, *repo_path = NULL;
6854 	int ch;
6855 	struct tog_view *view;
6856 	int *pack_fds = NULL;
6857 
6858 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6859 		switch (ch) {
6860 		case 'r':
6861 			repo_path = realpath(optarg, NULL);
6862 			if (repo_path == NULL)
6863 				return got_error_from_errno2("realpath",
6864 				    optarg);
6865 			break;
6866 		default:
6867 			usage_ref();
6868 			/* NOTREACHED */
6869 		}
6870 	}
6871 
6872 	argc -= optind;
6873 	argv += optind;
6874 
6875 	if (argc > 1)
6876 		usage_ref();
6877 
6878 	error = got_repo_pack_fds_open(&pack_fds);
6879 	if (error != NULL)
6880 		goto done;
6881 
6882 	if (repo_path == NULL) {
6883 		cwd = getcwd(NULL, 0);
6884 		if (cwd == NULL)
6885 			return got_error_from_errno("getcwd");
6886 		error = got_worktree_open(&worktree, cwd);
6887 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6888 			goto done;
6889 		if (worktree)
6890 			repo_path =
6891 			    strdup(got_worktree_get_repo_path(worktree));
6892 		else
6893 			repo_path = strdup(cwd);
6894 		if (repo_path == NULL) {
6895 			error = got_error_from_errno("strdup");
6896 			goto done;
6897 		}
6898 	}
6899 
6900 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6901 	if (error != NULL)
6902 		goto done;
6903 
6904 	init_curses();
6905 
6906 	error = apply_unveil(got_repo_get_path(repo), NULL);
6907 	if (error)
6908 		goto done;
6909 
6910 	error = tog_load_refs(repo, 0);
6911 	if (error)
6912 		goto done;
6913 
6914 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6915 	if (view == NULL) {
6916 		error = got_error_from_errno("view_open");
6917 		goto done;
6918 	}
6919 
6920 	error = open_ref_view(view, repo);
6921 	if (error)
6922 		goto done;
6923 
6924 	if (worktree) {
6925 		/* Release work tree lock. */
6926 		got_worktree_close(worktree);
6927 		worktree = NULL;
6928 	}
6929 	error = view_loop(view);
6930 done:
6931 	free(repo_path);
6932 	free(cwd);
6933 	if (repo) {
6934 		const struct got_error *close_err = got_repo_close(repo);
6935 		if (close_err)
6936 			error = close_err;
6937 	}
6938 	if (pack_fds) {
6939 		const struct got_error *pack_err =
6940 		    got_repo_pack_fds_close(pack_fds);
6941 		if (error == NULL)
6942 			error = pack_err;
6943 	}
6944 	tog_free_refs();
6945 	return error;
6946 }
6947 
6948 static void
6949 list_commands(FILE *fp)
6950 {
6951 	size_t i;
6952 
6953 	fprintf(fp, "commands:");
6954 	for (i = 0; i < nitems(tog_commands); i++) {
6955 		const struct tog_cmd *cmd = &tog_commands[i];
6956 		fprintf(fp, " %s", cmd->name);
6957 	}
6958 	fputc('\n', fp);
6959 }
6960 
6961 __dead static void
6962 usage(int hflag, int status)
6963 {
6964 	FILE *fp = (status == 0) ? stdout : stderr;
6965 
6966 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
6967 	    getprogname());
6968 	if (hflag) {
6969 		fprintf(fp, "lazy usage: %s path\n", getprogname());
6970 		list_commands(fp);
6971 	}
6972 	exit(status);
6973 }
6974 
6975 static char **
6976 make_argv(int argc, ...)
6977 {
6978 	va_list ap;
6979 	char **argv;
6980 	int i;
6981 
6982 	va_start(ap, argc);
6983 
6984 	argv = calloc(argc, sizeof(char *));
6985 	if (argv == NULL)
6986 		err(1, "calloc");
6987 	for (i = 0; i < argc; i++) {
6988 		argv[i] = strdup(va_arg(ap, char *));
6989 		if (argv[i] == NULL)
6990 			err(1, "strdup");
6991 	}
6992 
6993 	va_end(ap);
6994 	return argv;
6995 }
6996 
6997 /*
6998  * Try to convert 'tog path' into a 'tog log path' command.
6999  * The user could simply have mistyped the command rather than knowingly
7000  * provided a path. So check whether argv[0] can in fact be resolved
7001  * to a path in the HEAD commit and print a special error if not.
7002  * This hack is for mpi@ <3
7003  */
7004 static const struct got_error *
7005 tog_log_with_path(int argc, char *argv[])
7006 {
7007 	const struct got_error *error = NULL, *close_err;
7008 	const struct tog_cmd *cmd = NULL;
7009 	struct got_repository *repo = NULL;
7010 	struct got_worktree *worktree = NULL;
7011 	struct got_object_id *commit_id = NULL, *id = NULL;
7012 	struct got_commit_object *commit = NULL;
7013 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7014 	char *commit_id_str = NULL, **cmd_argv = NULL;
7015 	int *pack_fds = NULL;
7016 
7017 	cwd = getcwd(NULL, 0);
7018 	if (cwd == NULL)
7019 		return got_error_from_errno("getcwd");
7020 
7021 	error = got_repo_pack_fds_open(&pack_fds);
7022 	if (error != NULL)
7023 		goto done;
7024 
7025 	error = got_worktree_open(&worktree, cwd);
7026 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7027 		goto done;
7028 
7029 	if (worktree)
7030 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7031 	else
7032 		repo_path = strdup(cwd);
7033 	if (repo_path == NULL) {
7034 		error = got_error_from_errno("strdup");
7035 		goto done;
7036 	}
7037 
7038 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7039 	if (error != NULL)
7040 		goto done;
7041 
7042 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7043 	    repo, worktree);
7044 	if (error)
7045 		goto done;
7046 
7047 	error = tog_load_refs(repo, 0);
7048 	if (error)
7049 		goto done;
7050 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7051 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7052 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7053 	if (error)
7054 		goto done;
7055 
7056 	if (worktree) {
7057 		got_worktree_close(worktree);
7058 		worktree = NULL;
7059 	}
7060 
7061 	error = got_object_open_as_commit(&commit, repo, commit_id);
7062 	if (error)
7063 		goto done;
7064 
7065 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7066 	if (error) {
7067 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7068 			goto done;
7069 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7070 		    getprogname(), argv[0]);
7071 		usage(1, 1);
7072 		/* not reached */
7073 	}
7074 
7075 	close_err = got_repo_close(repo);
7076 	if (error == NULL)
7077 		error = close_err;
7078 	repo = NULL;
7079 
7080 	error = got_object_id_str(&commit_id_str, commit_id);
7081 	if (error)
7082 		goto done;
7083 
7084 	cmd = &tog_commands[0]; /* log */
7085 	argc = 4;
7086 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7087 	error = cmd->cmd_main(argc, cmd_argv);
7088 done:
7089 	if (repo) {
7090 		close_err = got_repo_close(repo);
7091 		if (error == NULL)
7092 			error = close_err;
7093 	}
7094 	if (commit)
7095 		got_object_commit_close(commit);
7096 	if (worktree)
7097 		got_worktree_close(worktree);
7098 	if (pack_fds) {
7099 		const struct got_error *pack_err =
7100 		    got_repo_pack_fds_close(pack_fds);
7101 		if (error == NULL)
7102 			error = pack_err;
7103 	}
7104 	free(id);
7105 	free(commit_id_str);
7106 	free(commit_id);
7107 	free(cwd);
7108 	free(repo_path);
7109 	free(in_repo_path);
7110 	if (cmd_argv) {
7111 		int i;
7112 		for (i = 0; i < argc; i++)
7113 			free(cmd_argv[i]);
7114 		free(cmd_argv);
7115 	}
7116 	tog_free_refs();
7117 	return error;
7118 }
7119 
7120 int
7121 main(int argc, char *argv[])
7122 {
7123 	const struct got_error *error = NULL;
7124 	const struct tog_cmd *cmd = NULL;
7125 	int ch, hflag = 0, Vflag = 0;
7126 	char **cmd_argv = NULL;
7127 	static const struct option longopts[] = {
7128 	    { "version", no_argument, NULL, 'V' },
7129 	    { NULL, 0, NULL, 0}
7130 	};
7131 
7132 	setlocale(LC_CTYPE, "");
7133 
7134 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7135 		switch (ch) {
7136 		case 'h':
7137 			hflag = 1;
7138 			break;
7139 		case 'V':
7140 			Vflag = 1;
7141 			break;
7142 		default:
7143 			usage(hflag, 1);
7144 			/* NOTREACHED */
7145 		}
7146 	}
7147 
7148 	argc -= optind;
7149 	argv += optind;
7150 	optind = 1;
7151 	optreset = 1;
7152 
7153 	if (Vflag) {
7154 		got_version_print_str();
7155 		return 0;
7156 	}
7157 
7158 #ifndef PROFILE
7159 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7160 	    NULL) == -1)
7161 		err(1, "pledge");
7162 #endif
7163 
7164 	if (argc == 0) {
7165 		if (hflag)
7166 			usage(hflag, 0);
7167 		/* Build an argument vector which runs a default command. */
7168 		cmd = &tog_commands[0];
7169 		argc = 1;
7170 		cmd_argv = make_argv(argc, cmd->name);
7171 	} else {
7172 		size_t i;
7173 
7174 		/* Did the user specify a command? */
7175 		for (i = 0; i < nitems(tog_commands); i++) {
7176 			if (strncmp(tog_commands[i].name, argv[0],
7177 			    strlen(argv[0])) == 0) {
7178 				cmd = &tog_commands[i];
7179 				break;
7180 			}
7181 		}
7182 	}
7183 
7184 	if (cmd == NULL) {
7185 		if (argc != 1)
7186 			usage(0, 1);
7187 		/* No command specified; try log with a path */
7188 		error = tog_log_with_path(argc, argv);
7189 	} else {
7190 		if (hflag)
7191 			cmd->cmd_usage();
7192 		else
7193 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7194 	}
7195 
7196 	endwin();
7197 	putchar('\n');
7198 	if (cmd_argv) {
7199 		int i;
7200 		for (i = 0; i < argc; i++)
7201 			free(cmd_argv[i]);
7202 		free(cmd_argv);
7203 	}
7204 
7205 	if (error && error->code != GOT_ERR_CANCELLED)
7206 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7207 	return 0;
7208 }