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