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