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Date:: Thu Jun 23 14:09:35 2022 UTC
Message:: fix a segfault in tog diff The f1 tempfile must always be created. Even if the initial diff has no objects on the left side, the view can be switched to a different diff which does have objects on both sides. When that happened, tog crashed. (To reproduce: open tog in got.git, hit G, hit Enter, hit <)
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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(void)
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 (view->child) {
774 		view->child->begin_x = view_split_begin_x(view->begin_x);
775 		if (view->child->begin_x == 0) {
776 			ncols = COLS;
777 
778 			view_fullscreen(view->child);
779 			if (view->child->focussed)
780 				show_panel(view->child->panel);
781 			else
782 				show_panel(view->panel);
783 		} else {
784 			ncols = view->child->begin_x;
785 
786 			view_splitscreen(view->child);
787 			show_panel(view->child->panel);
788 		}
789 	} else if (view->parent == NULL)
790 		ncols = COLS;
791 
792 	if (wresize(view->window, nlines, ncols) == ERR)
793 		return got_error_from_errno("wresize");
794 	if (replace_panel(view->panel, view->window) == ERR)
795 		return got_error_from_errno("replace_panel");
796 	wclear(view->window);
797 
798 	view->nlines = nlines;
799 	view->ncols = ncols;
800 	view->lines = LINES;
801 	view->cols = COLS;
802 
803 	return NULL;
804 }
805 
806 static const struct got_error *
807 view_close_child(struct tog_view *view)
808 {
809 	const struct got_error *err = NULL;
810 
811 	if (view->child == NULL)
812 		return NULL;
813 
814 	err = view_close(view->child);
815 	view->child = NULL;
816 	return err;
817 }
818 
819 static const struct got_error *
820 view_set_child(struct tog_view *view, struct tog_view *child)
821 {
822 	view->child = child;
823 	child->parent = view;
824 
825 	return view_resize(view);
826 }
827 
828 static int
829 view_is_splitscreen(struct tog_view *view)
830 {
831 	return view->begin_x > 0;
832 }
833 
834 static void
835 tog_resizeterm(void)
836 {
837 	int cols, lines;
838 	struct winsize size;
839 
840 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
841 		cols = 80;     /* Default */
842 		lines = 24;
843 	} else {
844 		cols = size.ws_col;
845 		lines = size.ws_row;
846 	}
847 	resize_term(lines, cols);
848 }
849 
850 static const struct got_error *
851 view_search_start(struct tog_view *view)
852 {
853 	const struct got_error *err = NULL;
854 	char pattern[1024];
855 	int ret;
856 
857 	if (view->search_started) {
858 		regfree(&view->regex);
859 		view->searching = 0;
860 		memset(&view->regmatch, 0, sizeof(view->regmatch));
861 	}
862 	view->search_started = 0;
863 
864 	if (view->nlines < 1)
865 		return NULL;
866 
867 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
868 	wclrtoeol(view->window);
869 
870 	nocbreak();
871 	echo();
872 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
873 	cbreak();
874 	noecho();
875 	if (ret == ERR)
876 		return NULL;
877 
878 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
879 		err = view->search_start(view);
880 		if (err) {
881 			regfree(&view->regex);
882 			return err;
883 		}
884 		view->search_started = 1;
885 		view->searching = TOG_SEARCH_FORWARD;
886 		view->search_next_done = 0;
887 		view->search_next(view);
888 	}
889 
890 	return NULL;
891 }
892 
893 static const struct got_error *
894 view_input(struct tog_view **new, int *done, struct tog_view *view,
895     struct tog_view_list_head *views)
896 {
897 	const struct got_error *err = NULL;
898 	struct tog_view *v;
899 	int ch, errcode;
900 
901 	*new = NULL;
902 
903 	/* Clear "no matches" indicator. */
904 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
905 	    view->search_next_done == TOG_SEARCH_HAVE_NONE)
906 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
907 
908 	if (view->searching && !view->search_next_done) {
909 		errcode = pthread_mutex_unlock(&tog_mutex);
910 		if (errcode)
911 			return got_error_set_errno(errcode,
912 			    "pthread_mutex_unlock");
913 		sched_yield();
914 		errcode = pthread_mutex_lock(&tog_mutex);
915 		if (errcode)
916 			return got_error_set_errno(errcode,
917 			    "pthread_mutex_lock");
918 		view->search_next(view);
919 		return NULL;
920 	}
921 
922 	nodelay(stdscr, FALSE);
923 	/* Allow threads to make progress while we are waiting for input. */
924 	errcode = pthread_mutex_unlock(&tog_mutex);
925 	if (errcode)
926 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
927 	ch = wgetch(view->window);
928 	errcode = pthread_mutex_lock(&tog_mutex);
929 	if (errcode)
930 		return got_error_set_errno(errcode, "pthread_mutex_lock");
931 	nodelay(stdscr, TRUE);
932 
933 	if (tog_sigwinch_received || tog_sigcont_received) {
934 		tog_resizeterm();
935 		tog_sigwinch_received = 0;
936 		tog_sigcont_received = 0;
937 		TAILQ_FOREACH(v, views, entry) {
938 			err = view_resize(v);
939 			if (err)
940 				return err;
941 			err = v->input(new, v, KEY_RESIZE);
942 			if (err)
943 				return err;
944 			if (v->child) {
945 				err = view_resize(v->child);
946 				if (err)
947 					return err;
948 				err = v->child->input(new, v->child,
949 				    KEY_RESIZE);
950 				if (err)
951 					return err;
952 			}
953 		}
954 	}
955 
956 	switch (ch) {
957 	case '\t':
958 		if (view->child) {
959 			view->focussed = 0;
960 			view->child->focussed = 1;
961 			view->focus_child = 1;
962 		} else if (view->parent) {
963 			view->focussed = 0;
964 			view->parent->focussed = 1;
965 			view->parent->focus_child = 0;
966 		}
967 		break;
968 	case 'q':
969 		err = view->input(new, view, ch);
970 		view->dying = 1;
971 		break;
972 	case 'Q':
973 		*done = 1;
974 		break;
975 	case 'f':
976 		if (view_is_parent_view(view)) {
977 			if (view->child == NULL)
978 				break;
979 			if (view_is_splitscreen(view->child)) {
980 				view->focussed = 0;
981 				view->child->focussed = 1;
982 				err = view_fullscreen(view->child);
983 			} else
984 				err = view_splitscreen(view->child);
985 			if (err)
986 				break;
987 			err = view->child->input(new, view->child,
988 			    KEY_RESIZE);
989 		} else {
990 			if (view_is_splitscreen(view)) {
991 				view->parent->focussed = 0;
992 				view->focussed = 1;
993 				err = view_fullscreen(view);
994 			} else {
995 				err = view_splitscreen(view);
996 			}
997 			if (err)
998 				break;
999 			err = view->input(new, view, KEY_RESIZE);
1000 		}
1001 		break;
1002 	case KEY_RESIZE:
1003 		break;
1004 	case '/':
1005 		if (view->search_start)
1006 			view_search_start(view);
1007 		else
1008 			err = view->input(new, view, ch);
1009 		break;
1010 	case 'N':
1011 	case 'n':
1012 		if (view->search_started && view->search_next) {
1013 			view->searching = (ch == 'n' ?
1014 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1015 			view->search_next_done = 0;
1016 			view->search_next(view);
1017 		} else
1018 			err = view->input(new, view, ch);
1019 		break;
1020 	default:
1021 		err = view->input(new, view, ch);
1022 		break;
1023 	}
1024 
1025 	return err;
1026 }
1027 
1028 void
1029 view_vborder(struct tog_view *view)
1030 {
1031 	PANEL *panel;
1032 	const struct tog_view *view_above;
1033 
1034 	if (view->parent)
1035 		return view_vborder(view->parent);
1036 
1037 	panel = panel_above(view->panel);
1038 	if (panel == NULL)
1039 		return;
1040 
1041 	view_above = panel_userptr(panel);
1042 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1043 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
1044 }
1045 
1046 int
1047 view_needs_focus_indication(struct tog_view *view)
1048 {
1049 	if (view_is_parent_view(view)) {
1050 		if (view->child == NULL || view->child->focussed)
1051 			return 0;
1052 		if (!view_is_splitscreen(view->child))
1053 			return 0;
1054 	} else if (!view_is_splitscreen(view))
1055 		return 0;
1056 
1057 	return view->focussed;
1058 }
1059 
1060 static const struct got_error *
1061 view_loop(struct tog_view *view)
1062 {
1063 	const struct got_error *err = NULL;
1064 	struct tog_view_list_head views;
1065 	struct tog_view *new_view;
1066 	int fast_refresh = 10;
1067 	int done = 0, errcode;
1068 
1069 	errcode = pthread_mutex_lock(&tog_mutex);
1070 	if (errcode)
1071 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1072 
1073 	TAILQ_INIT(&views);
1074 	TAILQ_INSERT_HEAD(&views, view, entry);
1075 
1076 	view->focussed = 1;
1077 	err = view->show(view);
1078 	if (err)
1079 		return err;
1080 	update_panels();
1081 	doupdate();
1082 	while (!TAILQ_EMPTY(&views) && !done && !tog_fatal_signal_received()) {
1083 		/* Refresh fast during initialization, then become slower. */
1084 		if (fast_refresh && fast_refresh-- == 0)
1085 			halfdelay(10); /* switch to once per second */
1086 
1087 		err = view_input(&new_view, &done, view, &views);
1088 		if (err)
1089 			break;
1090 		if (view->dying) {
1091 			struct tog_view *v, *prev = NULL;
1092 
1093 			if (view_is_parent_view(view))
1094 				prev = TAILQ_PREV(view, tog_view_list_head,
1095 				    entry);
1096 			else if (view->parent)
1097 				prev = view->parent;
1098 
1099 			if (view->parent) {
1100 				view->parent->child = NULL;
1101 				view->parent->focus_child = 0;
1102 
1103 				err = view_resize(view->parent);
1104 				if (err)
1105 					break;
1106 			} else
1107 				TAILQ_REMOVE(&views, view, entry);
1108 
1109 			err = view_close(view);
1110 			if (err)
1111 				goto done;
1112 
1113 			view = NULL;
1114 			TAILQ_FOREACH(v, &views, entry) {
1115 				if (v->focussed)
1116 					break;
1117 			}
1118 			if (view == NULL && new_view == NULL) {
1119 				/* No view has focus. Try to pick one. */
1120 				if (prev)
1121 					view = prev;
1122 				else if (!TAILQ_EMPTY(&views)) {
1123 					view = TAILQ_LAST(&views,
1124 					    tog_view_list_head);
1125 				}
1126 				if (view) {
1127 					if (view->focus_child) {
1128 						view->child->focussed = 1;
1129 						view = view->child;
1130 					} else
1131 						view->focussed = 1;
1132 				}
1133 			}
1134 		}
1135 		if (new_view) {
1136 			struct tog_view *v, *t;
1137 			/* Only allow one parent view per type. */
1138 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1139 				if (v->type != new_view->type)
1140 					continue;
1141 				TAILQ_REMOVE(&views, v, entry);
1142 				err = view_close(v);
1143 				if (err)
1144 					goto done;
1145 				break;
1146 			}
1147 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1148 			view = new_view;
1149 		}
1150 		if (view) {
1151 			if (view_is_parent_view(view)) {
1152 				if (view->child && view->child->focussed)
1153 					view = view->child;
1154 			} else {
1155 				if (view->parent && view->parent->focussed)
1156 					view = view->parent;
1157 			}
1158 			show_panel(view->panel);
1159 			if (view->child && view_is_splitscreen(view->child))
1160 				show_panel(view->child->panel);
1161 			if (view->parent && view_is_splitscreen(view)) {
1162 				err = view->parent->show(view->parent);
1163 				if (err)
1164 					goto done;
1165 			}
1166 			err = view->show(view);
1167 			if (err)
1168 				goto done;
1169 			if (view->child) {
1170 				err = view->child->show(view->child);
1171 				if (err)
1172 					goto done;
1173 			}
1174 			update_panels();
1175 			doupdate();
1176 		}
1177 	}
1178 done:
1179 	while (!TAILQ_EMPTY(&views)) {
1180 		view = TAILQ_FIRST(&views);
1181 		TAILQ_REMOVE(&views, view, entry);
1182 		view_close(view);
1183 	}
1184 
1185 	errcode = pthread_mutex_unlock(&tog_mutex);
1186 	if (errcode && err == NULL)
1187 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1188 
1189 	return err;
1190 }
1191 
1192 __dead static void
1193 usage_log(void)
1194 {
1195 	endwin();
1196 	fprintf(stderr,
1197 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1198 	    getprogname());
1199 	exit(1);
1200 }
1201 
1202 /* Create newly allocated wide-character string equivalent to a byte string. */
1203 static const struct got_error *
1204 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1205 {
1206 	char *vis = NULL;
1207 	const struct got_error *err = NULL;
1208 
1209 	*ws = NULL;
1210 	*wlen = mbstowcs(NULL, s, 0);
1211 	if (*wlen == (size_t)-1) {
1212 		int vislen;
1213 		if (errno != EILSEQ)
1214 			return got_error_from_errno("mbstowcs");
1215 
1216 		/* byte string invalid in current encoding; try to "fix" it */
1217 		err = got_mbsavis(&vis, &vislen, s);
1218 		if (err)
1219 			return err;
1220 		*wlen = mbstowcs(NULL, vis, 0);
1221 		if (*wlen == (size_t)-1) {
1222 			err = got_error_from_errno("mbstowcs"); /* give up */
1223 			goto done;
1224 		}
1225 	}
1226 
1227 	*ws = calloc(*wlen + 1, sizeof(**ws));
1228 	if (*ws == NULL) {
1229 		err = got_error_from_errno("calloc");
1230 		goto done;
1231 	}
1232 
1233 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1234 		err = got_error_from_errno("mbstowcs");
1235 done:
1236 	free(vis);
1237 	if (err) {
1238 		free(*ws);
1239 		*ws = NULL;
1240 		*wlen = 0;
1241 	}
1242 	return err;
1243 }
1244 
1245 static const struct got_error *
1246 expand_tab(char **ptr, const char *src)
1247 {
1248 	char	*dst;
1249 	size_t	 len, n, idx = 0, sz = 0;
1250 
1251 	*ptr = NULL;
1252 	n = len = strlen(src);
1253 	dst = malloc(n + 1);
1254 	if (dst == NULL)
1255 		return got_error_from_errno("malloc");
1256 
1257 	while (idx < len && src[idx]) {
1258 		const char c = src[idx];
1259 
1260 		if (c == '\t') {
1261 			size_t nb = TABSIZE - sz % TABSIZE;
1262 			char *p;
1263 
1264 			p = realloc(dst, n + nb);
1265 			if (p == NULL) {
1266 				free(dst);
1267 				return got_error_from_errno("realloc");
1268 
1269 			}
1270 			dst = p;
1271 			n += nb;
1272 			memset(dst + sz, ' ', nb);
1273 			sz += nb;
1274 		} else
1275 			dst[sz++] = src[idx];
1276 		++idx;
1277 	}
1278 
1279 	dst[sz] = '\0';
1280 	*ptr = dst;
1281 	return NULL;
1282 }
1283 
1284 /*
1285  * Advance at most n columns from wline starting at offset off.
1286  * Return the index to the first character after the span operation.
1287  * Return the combined column width of all spanned wide character in
1288  * *rcol.
1289  */
1290 static int
1291 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1292 {
1293 	int width, i, cols = 0;
1294 
1295 	if (n == 0) {
1296 		*rcol = cols;
1297 		return off;
1298 	}
1299 
1300 	for (i = off; wline[i] != L'\0'; ++i) {
1301 		if (wline[i] == L'\t')
1302 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1303 		else
1304 			width = wcwidth(wline[i]);
1305 
1306 		if (width == -1) {
1307 			width = 1;
1308 			wline[i] = L'.';
1309 		}
1310 
1311 		if (cols + width > n)
1312 			break;
1313 		cols += width;
1314 	}
1315 
1316 	*rcol = cols;
1317 	return i;
1318 }
1319 
1320 /*
1321  * Format a line for display, ensuring that it won't overflow a width limit.
1322  * With scrolling, the width returned refers to the scrolled version of the
1323  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1324  */
1325 static const struct got_error *
1326 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1327     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1328 {
1329 	const struct got_error *err = NULL;
1330 	int cols;
1331 	wchar_t *wline = NULL;
1332 	char *exstr = NULL;
1333 	size_t wlen;
1334 	int i, scrollx;
1335 
1336 	*wlinep = NULL;
1337 	*widthp = 0;
1338 
1339 	if (expand) {
1340 		err = expand_tab(&exstr, line);
1341 		if (err)
1342 			return err;
1343 	}
1344 
1345 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1346 	free(exstr);
1347 	if (err)
1348 		return err;
1349 
1350 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1351 
1352 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1353 		wline[wlen - 1] = L'\0';
1354 		wlen--;
1355 	}
1356 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1357 		wline[wlen - 1] = L'\0';
1358 		wlen--;
1359 	}
1360 
1361 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1362 	wline[i] = L'\0';
1363 
1364 	if (widthp)
1365 		*widthp = cols;
1366 	if (scrollxp)
1367 		*scrollxp = scrollx;
1368 	if (err)
1369 		free(wline);
1370 	else
1371 		*wlinep = wline;
1372 	return err;
1373 }
1374 
1375 static const struct got_error*
1376 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1377     struct got_object_id *id, struct got_repository *repo)
1378 {
1379 	static const struct got_error *err = NULL;
1380 	struct got_reflist_entry *re;
1381 	char *s;
1382 	const char *name;
1383 
1384 	*refs_str = NULL;
1385 
1386 	TAILQ_FOREACH(re, refs, entry) {
1387 		struct got_tag_object *tag = NULL;
1388 		struct got_object_id *ref_id;
1389 		int cmp;
1390 
1391 		name = got_ref_get_name(re->ref);
1392 		if (strcmp(name, GOT_REF_HEAD) == 0)
1393 			continue;
1394 		if (strncmp(name, "refs/", 5) == 0)
1395 			name += 5;
1396 		if (strncmp(name, "got/", 4) == 0 &&
1397 		    strncmp(name, "got/backup/", 11) != 0)
1398 			continue;
1399 		if (strncmp(name, "heads/", 6) == 0)
1400 			name += 6;
1401 		if (strncmp(name, "remotes/", 8) == 0) {
1402 			name += 8;
1403 			s = strstr(name, "/" GOT_REF_HEAD);
1404 			if (s != NULL && s[strlen(s)] == '\0')
1405 				continue;
1406 		}
1407 		err = got_ref_resolve(&ref_id, repo, re->ref);
1408 		if (err)
1409 			break;
1410 		if (strncmp(name, "tags/", 5) == 0) {
1411 			err = got_object_open_as_tag(&tag, repo, ref_id);
1412 			if (err) {
1413 				if (err->code != GOT_ERR_OBJ_TYPE) {
1414 					free(ref_id);
1415 					break;
1416 				}
1417 				/* Ref points at something other than a tag. */
1418 				err = NULL;
1419 				tag = NULL;
1420 			}
1421 		}
1422 		cmp = got_object_id_cmp(tag ?
1423 		    got_object_tag_get_object_id(tag) : ref_id, id);
1424 		free(ref_id);
1425 		if (tag)
1426 			got_object_tag_close(tag);
1427 		if (cmp != 0)
1428 			continue;
1429 		s = *refs_str;
1430 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1431 		    s ? ", " : "", name) == -1) {
1432 			err = got_error_from_errno("asprintf");
1433 			free(s);
1434 			*refs_str = NULL;
1435 			break;
1436 		}
1437 		free(s);
1438 	}
1439 
1440 	return err;
1441 }
1442 
1443 static const struct got_error *
1444 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1445     int col_tab_align)
1446 {
1447 	char *smallerthan;
1448 
1449 	smallerthan = strchr(author, '<');
1450 	if (smallerthan && smallerthan[1] != '\0')
1451 		author = smallerthan + 1;
1452 	author[strcspn(author, "@>")] = '\0';
1453 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1454 	    col_tab_align, 0);
1455 }
1456 
1457 static const struct got_error *
1458 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1459     struct got_object_id *id, const size_t date_display_cols,
1460     int author_display_cols)
1461 {
1462 	struct tog_log_view_state *s = &view->state.log;
1463 	const struct got_error *err = NULL;
1464 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1465 	char *logmsg0 = NULL, *logmsg = NULL;
1466 	char *author = NULL;
1467 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1468 	int author_width, logmsg_width;
1469 	char *newline, *line = NULL;
1470 	int col, limit, scrollx;
1471 	const int avail = view->ncols;
1472 	struct tm tm;
1473 	time_t committer_time;
1474 	struct tog_color *tc;
1475 
1476 	committer_time = got_object_commit_get_committer_time(commit);
1477 	if (gmtime_r(&committer_time, &tm) == NULL)
1478 		return got_error_from_errno("gmtime_r");
1479 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1480 		return got_error(GOT_ERR_NO_SPACE);
1481 
1482 	if (avail <= date_display_cols)
1483 		limit = MIN(sizeof(datebuf) - 1, avail);
1484 	else
1485 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1486 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1487 	if (tc)
1488 		wattr_on(view->window,
1489 		    COLOR_PAIR(tc->colorpair), NULL);
1490 	waddnstr(view->window, datebuf, limit);
1491 	if (tc)
1492 		wattr_off(view->window,
1493 		    COLOR_PAIR(tc->colorpair), NULL);
1494 	col = limit;
1495 	if (col > avail)
1496 		goto done;
1497 
1498 	if (avail >= 120) {
1499 		char *id_str;
1500 		err = got_object_id_str(&id_str, id);
1501 		if (err)
1502 			goto done;
1503 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1504 		if (tc)
1505 			wattr_on(view->window,
1506 			    COLOR_PAIR(tc->colorpair), NULL);
1507 		wprintw(view->window, "%.8s ", id_str);
1508 		if (tc)
1509 			wattr_off(view->window,
1510 			    COLOR_PAIR(tc->colorpair), NULL);
1511 		free(id_str);
1512 		col += 9;
1513 		if (col > avail)
1514 			goto done;
1515 	}
1516 
1517 	author = strdup(got_object_commit_get_author(commit));
1518 	if (author == NULL) {
1519 		err = got_error_from_errno("strdup");
1520 		goto done;
1521 	}
1522 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1523 	if (err)
1524 		goto done;
1525 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1526 	if (tc)
1527 		wattr_on(view->window,
1528 		    COLOR_PAIR(tc->colorpair), NULL);
1529 	waddwstr(view->window, wauthor);
1530 	if (tc)
1531 		wattr_off(view->window,
1532 		    COLOR_PAIR(tc->colorpair), NULL);
1533 	col += author_width;
1534 	while (col < avail && author_width < author_display_cols + 2) {
1535 		waddch(view->window, ' ');
1536 		col++;
1537 		author_width++;
1538 	}
1539 	if (col > avail)
1540 		goto done;
1541 
1542 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1543 	if (err)
1544 		goto done;
1545 	logmsg = logmsg0;
1546 	while (*logmsg == '\n')
1547 		logmsg++;
1548 	newline = strchr(logmsg, '\n');
1549 	if (newline)
1550 		*newline = '\0';
1551 	limit = avail - col;
1552 	if (view->child && limit > 0)
1553 		limit--;	/* for the border */
1554 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
1555 	    limit, col, 1);
1556 	if (err)
1557 		goto done;
1558 	waddwstr(view->window, &wlogmsg[scrollx]);
1559 	col += MAX(logmsg_width, 0);
1560 	while (col < avail) {
1561 		waddch(view->window, ' ');
1562 		col++;
1563 	}
1564 done:
1565 	free(logmsg0);
1566 	free(wlogmsg);
1567 	free(author);
1568 	free(wauthor);
1569 	free(line);
1570 	return err;
1571 }
1572 
1573 static struct commit_queue_entry *
1574 alloc_commit_queue_entry(struct got_commit_object *commit,
1575     struct got_object_id *id)
1576 {
1577 	struct commit_queue_entry *entry;
1578 
1579 	entry = calloc(1, sizeof(*entry));
1580 	if (entry == NULL)
1581 		return NULL;
1582 
1583 	entry->id = id;
1584 	entry->commit = commit;
1585 	return entry;
1586 }
1587 
1588 static void
1589 pop_commit(struct commit_queue *commits)
1590 {
1591 	struct commit_queue_entry *entry;
1592 
1593 	entry = TAILQ_FIRST(&commits->head);
1594 	TAILQ_REMOVE(&commits->head, entry, entry);
1595 	got_object_commit_close(entry->commit);
1596 	commits->ncommits--;
1597 	/* Don't free entry->id! It is owned by the commit graph. */
1598 	free(entry);
1599 }
1600 
1601 static void
1602 free_commits(struct commit_queue *commits)
1603 {
1604 	while (!TAILQ_EMPTY(&commits->head))
1605 		pop_commit(commits);
1606 }
1607 
1608 static const struct got_error *
1609 match_commit(int *have_match, struct got_object_id *id,
1610     struct got_commit_object *commit, regex_t *regex)
1611 {
1612 	const struct got_error *err = NULL;
1613 	regmatch_t regmatch;
1614 	char *id_str = NULL, *logmsg = NULL;
1615 
1616 	*have_match = 0;
1617 
1618 	err = got_object_id_str(&id_str, id);
1619 	if (err)
1620 		return err;
1621 
1622 	err = got_object_commit_get_logmsg(&logmsg, commit);
1623 	if (err)
1624 		goto done;
1625 
1626 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1627 	    &regmatch, 0) == 0 ||
1628 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1629 	    &regmatch, 0) == 0 ||
1630 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1631 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1632 		*have_match = 1;
1633 done:
1634 	free(id_str);
1635 	free(logmsg);
1636 	return err;
1637 }
1638 
1639 static const struct got_error *
1640 queue_commits(struct tog_log_thread_args *a)
1641 {
1642 	const struct got_error *err = NULL;
1643 
1644 	/*
1645 	 * We keep all commits open throughout the lifetime of the log
1646 	 * view in order to avoid having to re-fetch commits from disk
1647 	 * while updating the display.
1648 	 */
1649 	do {
1650 		struct got_object_id *id;
1651 		struct got_commit_object *commit;
1652 		struct commit_queue_entry *entry;
1653 		int errcode;
1654 
1655 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1656 		    NULL, NULL);
1657 		if (err || id == NULL)
1658 			break;
1659 
1660 		err = got_object_open_as_commit(&commit, a->repo, id);
1661 		if (err)
1662 			break;
1663 		entry = alloc_commit_queue_entry(commit, id);
1664 		if (entry == NULL) {
1665 			err = got_error_from_errno("alloc_commit_queue_entry");
1666 			break;
1667 		}
1668 
1669 		errcode = pthread_mutex_lock(&tog_mutex);
1670 		if (errcode) {
1671 			err = got_error_set_errno(errcode,
1672 			    "pthread_mutex_lock");
1673 			break;
1674 		}
1675 
1676 		entry->idx = a->commits->ncommits;
1677 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1678 		a->commits->ncommits++;
1679 
1680 		if (*a->searching == TOG_SEARCH_FORWARD &&
1681 		    !*a->search_next_done) {
1682 			int have_match;
1683 			err = match_commit(&have_match, id, commit, a->regex);
1684 			if (err)
1685 				break;
1686 			if (have_match)
1687 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1688 		}
1689 
1690 		errcode = pthread_mutex_unlock(&tog_mutex);
1691 		if (errcode && err == NULL)
1692 			err = got_error_set_errno(errcode,
1693 			    "pthread_mutex_unlock");
1694 		if (err)
1695 			break;
1696 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1697 
1698 	return err;
1699 }
1700 
1701 static void
1702 select_commit(struct tog_log_view_state *s)
1703 {
1704 	struct commit_queue_entry *entry;
1705 	int ncommits = 0;
1706 
1707 	entry = s->first_displayed_entry;
1708 	while (entry) {
1709 		if (ncommits == s->selected) {
1710 			s->selected_entry = entry;
1711 			break;
1712 		}
1713 		entry = TAILQ_NEXT(entry, entry);
1714 		ncommits++;
1715 	}
1716 }
1717 
1718 static const struct got_error *
1719 draw_commits(struct tog_view *view)
1720 {
1721 	const struct got_error *err = NULL;
1722 	struct tog_log_view_state *s = &view->state.log;
1723 	struct commit_queue_entry *entry = s->selected_entry;
1724 	const int limit = view->nlines;
1725 	int width;
1726 	int ncommits, author_cols = 4;
1727 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1728 	char *refs_str = NULL;
1729 	wchar_t *wline;
1730 	struct tog_color *tc;
1731 	static const size_t date_display_cols = 12;
1732 
1733 	if (s->selected_entry &&
1734 	    !(view->searching && view->search_next_done == 0)) {
1735 		struct got_reflist_head *refs;
1736 		err = got_object_id_str(&id_str, s->selected_entry->id);
1737 		if (err)
1738 			return err;
1739 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1740 		    s->selected_entry->id);
1741 		if (refs) {
1742 			err = build_refs_str(&refs_str, refs,
1743 			    s->selected_entry->id, s->repo);
1744 			if (err)
1745 				goto done;
1746 		}
1747 	}
1748 
1749 	if (s->thread_args.commits_needed == 0)
1750 		halfdelay(10); /* disable fast refresh */
1751 
1752 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
1753 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1754 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1755 		    (view->searching && !view->search_next_done) ?
1756 		    "searching..." : "loading...") == -1) {
1757 			err = got_error_from_errno("asprintf");
1758 			goto done;
1759 		}
1760 	} else {
1761 		const char *search_str = NULL;
1762 
1763 		if (view->searching) {
1764 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1765 				search_str = "no more matches";
1766 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1767 				search_str = "no matches found";
1768 			else if (!view->search_next_done)
1769 				search_str = "searching...";
1770 		}
1771 
1772 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1773 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1774 		    search_str ? search_str :
1775 		    (refs_str ? refs_str : "")) == -1) {
1776 			err = got_error_from_errno("asprintf");
1777 			goto done;
1778 		}
1779 	}
1780 
1781 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1782 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
1783 		    "........................................",
1784 		    s->in_repo_path, ncommits_str) == -1) {
1785 			err = got_error_from_errno("asprintf");
1786 			header = NULL;
1787 			goto done;
1788 		}
1789 	} else if (asprintf(&header, "commit %s%s",
1790 	    id_str ? id_str : "........................................",
1791 	    ncommits_str) == -1) {
1792 		err = got_error_from_errno("asprintf");
1793 		header = NULL;
1794 		goto done;
1795 	}
1796 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
1797 	if (err)
1798 		goto done;
1799 
1800 	werase(view->window);
1801 
1802 	if (view_needs_focus_indication(view))
1803 		wstandout(view->window);
1804 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1805 	if (tc)
1806 		wattr_on(view->window,
1807 		    COLOR_PAIR(tc->colorpair), NULL);
1808 	waddwstr(view->window, wline);
1809 	if (tc)
1810 		wattr_off(view->window,
1811 		    COLOR_PAIR(tc->colorpair), NULL);
1812 	while (width < view->ncols) {
1813 		waddch(view->window, ' ');
1814 		width++;
1815 	}
1816 	if (view_needs_focus_indication(view))
1817 		wstandend(view->window);
1818 	free(wline);
1819 	if (limit <= 1)
1820 		goto done;
1821 
1822 	/* Grow author column size if necessary, and set view->maxx. */
1823 	entry = s->first_displayed_entry;
1824 	ncommits = 0;
1825 	view->maxx = 0;
1826 	while (entry) {
1827 		char *author, *eol, *msg, *msg0;
1828 		wchar_t *wauthor, *wmsg;
1829 		int width;
1830 		if (ncommits >= limit - 1)
1831 			break;
1832 		author = strdup(got_object_commit_get_author(entry->commit));
1833 		if (author == NULL) {
1834 			err = got_error_from_errno("strdup");
1835 			goto done;
1836 		}
1837 		err = format_author(&wauthor, &width, author, COLS,
1838 		    date_display_cols);
1839 		if (author_cols < width)
1840 			author_cols = width;
1841 		free(wauthor);
1842 		free(author);
1843 		err = got_object_commit_get_logmsg(&msg0, entry->commit);
1844 		if (err)
1845 			goto done;
1846 		msg = msg0;
1847 		while (*msg == '\n')
1848 			++msg;
1849 		if ((eol = strchr(msg, '\n')))
1850 			*eol = '\0';
1851 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
1852 		    date_display_cols + author_cols, 0);
1853 		if (err)
1854 			goto done;
1855 		view->maxx = MAX(view->maxx, width);
1856 		free(msg0);
1857 		free(wmsg);
1858 		ncommits++;
1859 		entry = TAILQ_NEXT(entry, entry);
1860 	}
1861 
1862 	entry = s->first_displayed_entry;
1863 	s->last_displayed_entry = s->first_displayed_entry;
1864 	ncommits = 0;
1865 	while (entry) {
1866 		if (ncommits >= limit - 1)
1867 			break;
1868 		if (ncommits == s->selected)
1869 			wstandout(view->window);
1870 		err = draw_commit(view, entry->commit, entry->id,
1871 		    date_display_cols, author_cols);
1872 		if (ncommits == s->selected)
1873 			wstandend(view->window);
1874 		if (err)
1875 			goto done;
1876 		ncommits++;
1877 		s->last_displayed_entry = entry;
1878 		entry = TAILQ_NEXT(entry, entry);
1879 	}
1880 
1881 	view_vborder(view);
1882 	update_panels();
1883 	doupdate();
1884 done:
1885 	free(id_str);
1886 	free(refs_str);
1887 	free(ncommits_str);
1888 	free(header);
1889 	return err;
1890 }
1891 
1892 static void
1893 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1894 {
1895 	struct commit_queue_entry *entry;
1896 	int nscrolled = 0;
1897 
1898 	entry = TAILQ_FIRST(&s->commits.head);
1899 	if (s->first_displayed_entry == entry)
1900 		return;
1901 
1902 	entry = s->first_displayed_entry;
1903 	while (entry && nscrolled < maxscroll) {
1904 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1905 		if (entry) {
1906 			s->first_displayed_entry = entry;
1907 			nscrolled++;
1908 		}
1909 	}
1910 }
1911 
1912 static const struct got_error *
1913 trigger_log_thread(struct tog_view *view, int wait)
1914 {
1915 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1916 	int errcode;
1917 
1918 	halfdelay(1); /* fast refresh while loading commits */
1919 
1920 	while (ta->commits_needed > 0 || ta->load_all) {
1921 		if (ta->log_complete)
1922 			break;
1923 
1924 		/* Wake the log thread. */
1925 		errcode = pthread_cond_signal(&ta->need_commits);
1926 		if (errcode)
1927 			return got_error_set_errno(errcode,
1928 			    "pthread_cond_signal");
1929 
1930 		/*
1931 		 * The mutex will be released while the view loop waits
1932 		 * in wgetch(), at which time the log thread will run.
1933 		 */
1934 		if (!wait)
1935 			break;
1936 
1937 		/* Display progress update in log view. */
1938 		show_log_view(view);
1939 		update_panels();
1940 		doupdate();
1941 
1942 		/* Wait right here while next commit is being loaded. */
1943 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1944 		if (errcode)
1945 			return got_error_set_errno(errcode,
1946 			    "pthread_cond_wait");
1947 
1948 		/* Display progress update in log view. */
1949 		show_log_view(view);
1950 		update_panels();
1951 		doupdate();
1952 	}
1953 
1954 	return NULL;
1955 }
1956 
1957 static const struct got_error *
1958 log_scroll_down(struct tog_view *view, int maxscroll)
1959 {
1960 	struct tog_log_view_state *s = &view->state.log;
1961 	const struct got_error *err = NULL;
1962 	struct commit_queue_entry *pentry;
1963 	int nscrolled = 0, ncommits_needed;
1964 
1965 	if (s->last_displayed_entry == NULL)
1966 		return NULL;
1967 
1968 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
1969 	if (s->commits.ncommits < ncommits_needed &&
1970 	    !s->thread_args.log_complete) {
1971 		/*
1972 		 * Ask the log thread for required amount of commits.
1973 		 */
1974 		s->thread_args.commits_needed += maxscroll;
1975 		err = trigger_log_thread(view, 1);
1976 		if (err)
1977 			return err;
1978 	}
1979 
1980 	do {
1981 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1982 		if (pentry == NULL)
1983 			break;
1984 
1985 		s->last_displayed_entry = pentry;
1986 
1987 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1988 		if (pentry == NULL)
1989 			break;
1990 		s->first_displayed_entry = pentry;
1991 	} while (++nscrolled < maxscroll);
1992 
1993 	return err;
1994 }
1995 
1996 static const struct got_error *
1997 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1998     struct got_commit_object *commit, struct got_object_id *commit_id,
1999     struct tog_view *log_view, struct got_repository *repo)
2000 {
2001 	const struct got_error *err;
2002 	struct got_object_qid *parent_id;
2003 	struct tog_view *diff_view;
2004 
2005 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
2006 	if (diff_view == NULL)
2007 		return got_error_from_errno("view_open");
2008 
2009 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2010 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2011 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2012 	if (err == NULL)
2013 		*new_view = diff_view;
2014 	return err;
2015 }
2016 
2017 static const struct got_error *
2018 tree_view_visit_subtree(struct tog_tree_view_state *s,
2019     struct got_tree_object *subtree)
2020 {
2021 	struct tog_parent_tree *parent;
2022 
2023 	parent = calloc(1, sizeof(*parent));
2024 	if (parent == NULL)
2025 		return got_error_from_errno("calloc");
2026 
2027 	parent->tree = s->tree;
2028 	parent->first_displayed_entry = s->first_displayed_entry;
2029 	parent->selected_entry = s->selected_entry;
2030 	parent->selected = s->selected;
2031 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2032 	s->tree = subtree;
2033 	s->selected = 0;
2034 	s->first_displayed_entry = NULL;
2035 	return NULL;
2036 }
2037 
2038 static const struct got_error *
2039 tree_view_walk_path(struct tog_tree_view_state *s,
2040     struct got_commit_object *commit, const char *path)
2041 {
2042 	const struct got_error *err = NULL;
2043 	struct got_tree_object *tree = NULL;
2044 	const char *p;
2045 	char *slash, *subpath = NULL;
2046 
2047 	/* Walk the path and open corresponding tree objects. */
2048 	p = path;
2049 	while (*p) {
2050 		struct got_tree_entry *te;
2051 		struct got_object_id *tree_id;
2052 		char *te_name;
2053 
2054 		while (p[0] == '/')
2055 			p++;
2056 
2057 		/* Ensure the correct subtree entry is selected. */
2058 		slash = strchr(p, '/');
2059 		if (slash == NULL)
2060 			te_name = strdup(p);
2061 		else
2062 			te_name = strndup(p, slash - p);
2063 		if (te_name == NULL) {
2064 			err = got_error_from_errno("strndup");
2065 			break;
2066 		}
2067 		te = got_object_tree_find_entry(s->tree, te_name);
2068 		if (te == NULL) {
2069 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2070 			free(te_name);
2071 			break;
2072 		}
2073 		free(te_name);
2074 		s->first_displayed_entry = s->selected_entry = te;
2075 
2076 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2077 			break; /* jump to this file's entry */
2078 
2079 		slash = strchr(p, '/');
2080 		if (slash)
2081 			subpath = strndup(path, slash - path);
2082 		else
2083 			subpath = strdup(path);
2084 		if (subpath == NULL) {
2085 			err = got_error_from_errno("strdup");
2086 			break;
2087 		}
2088 
2089 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2090 		    subpath);
2091 		if (err)
2092 			break;
2093 
2094 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2095 		free(tree_id);
2096 		if (err)
2097 			break;
2098 
2099 		err = tree_view_visit_subtree(s, tree);
2100 		if (err) {
2101 			got_object_tree_close(tree);
2102 			break;
2103 		}
2104 		if (slash == NULL)
2105 			break;
2106 		free(subpath);
2107 		subpath = NULL;
2108 		p = slash;
2109 	}
2110 
2111 	free(subpath);
2112 	return err;
2113 }
2114 
2115 static const struct got_error *
2116 browse_commit_tree(struct tog_view **new_view, int begin_x,
2117     struct commit_queue_entry *entry, const char *path,
2118     const char *head_ref_name, struct got_repository *repo)
2119 {
2120 	const struct got_error *err = NULL;
2121 	struct tog_tree_view_state *s;
2122 	struct tog_view *tree_view;
2123 
2124 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
2125 	if (tree_view == NULL)
2126 		return got_error_from_errno("view_open");
2127 
2128 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2129 	if (err)
2130 		return err;
2131 	s = &tree_view->state.tree;
2132 
2133 	*new_view = tree_view;
2134 
2135 	if (got_path_is_root_dir(path))
2136 		return NULL;
2137 
2138 	return tree_view_walk_path(s, entry->commit, path);
2139 }
2140 
2141 static const struct got_error *
2142 block_signals_used_by_main_thread(void)
2143 {
2144 	sigset_t sigset;
2145 	int errcode;
2146 
2147 	if (sigemptyset(&sigset) == -1)
2148 		return got_error_from_errno("sigemptyset");
2149 
2150 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2151 	if (sigaddset(&sigset, SIGWINCH) == -1)
2152 		return got_error_from_errno("sigaddset");
2153 	if (sigaddset(&sigset, SIGCONT) == -1)
2154 		return got_error_from_errno("sigaddset");
2155 	if (sigaddset(&sigset, SIGINT) == -1)
2156 		return got_error_from_errno("sigaddset");
2157 	if (sigaddset(&sigset, SIGTERM) == -1)
2158 		return got_error_from_errno("sigaddset");
2159 
2160 	/* ncurses handles SIGTSTP */
2161 	if (sigaddset(&sigset, SIGTSTP) == -1)
2162 		return got_error_from_errno("sigaddset");
2163 
2164 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2165 	if (errcode)
2166 		return got_error_set_errno(errcode, "pthread_sigmask");
2167 
2168 	return NULL;
2169 }
2170 
2171 static void *
2172 log_thread(void *arg)
2173 {
2174 	const struct got_error *err = NULL;
2175 	int errcode = 0;
2176 	struct tog_log_thread_args *a = arg;
2177 	int done = 0;
2178 
2179 	err = block_signals_used_by_main_thread();
2180 	if (err)
2181 		return (void *)err;
2182 
2183 	while (!done && !err && !tog_fatal_signal_received()) {
2184 		err = queue_commits(a);
2185 		if (err) {
2186 			if (err->code != GOT_ERR_ITER_COMPLETED)
2187 				return (void *)err;
2188 			err = NULL;
2189 			done = 1;
2190 		} else if (a->commits_needed > 0 && !a->load_all)
2191 			a->commits_needed--;
2192 
2193 		errcode = pthread_mutex_lock(&tog_mutex);
2194 		if (errcode) {
2195 			err = got_error_set_errno(errcode,
2196 			    "pthread_mutex_lock");
2197 			break;
2198 		} else if (*a->quit)
2199 			done = 1;
2200 		else if (*a->first_displayed_entry == NULL) {
2201 			*a->first_displayed_entry =
2202 			    TAILQ_FIRST(&a->commits->head);
2203 			*a->selected_entry = *a->first_displayed_entry;
2204 		}
2205 
2206 		errcode = pthread_cond_signal(&a->commit_loaded);
2207 		if (errcode) {
2208 			err = got_error_set_errno(errcode,
2209 			    "pthread_cond_signal");
2210 			pthread_mutex_unlock(&tog_mutex);
2211 			break;
2212 		}
2213 
2214 		if (done)
2215 			a->commits_needed = 0;
2216 		else {
2217 			if (a->commits_needed == 0 && !a->load_all) {
2218 				errcode = pthread_cond_wait(&a->need_commits,
2219 				    &tog_mutex);
2220 				if (errcode)
2221 					err = got_error_set_errno(errcode,
2222 					    "pthread_cond_wait");
2223 				if (*a->quit)
2224 					done = 1;
2225 			}
2226 		}
2227 
2228 		errcode = pthread_mutex_unlock(&tog_mutex);
2229 		if (errcode && err == NULL)
2230 			err = got_error_set_errno(errcode,
2231 			    "pthread_mutex_unlock");
2232 	}
2233 	a->log_complete = 1;
2234 	return (void *)err;
2235 }
2236 
2237 static const struct got_error *
2238 stop_log_thread(struct tog_log_view_state *s)
2239 {
2240 	const struct got_error *err = NULL;
2241 	int errcode;
2242 
2243 	if (s->thread) {
2244 		s->quit = 1;
2245 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2246 		if (errcode)
2247 			return got_error_set_errno(errcode,
2248 			    "pthread_cond_signal");
2249 		errcode = pthread_mutex_unlock(&tog_mutex);
2250 		if (errcode)
2251 			return got_error_set_errno(errcode,
2252 			    "pthread_mutex_unlock");
2253 		errcode = pthread_join(s->thread, (void **)&err);
2254 		if (errcode)
2255 			return got_error_set_errno(errcode, "pthread_join");
2256 		errcode = pthread_mutex_lock(&tog_mutex);
2257 		if (errcode)
2258 			return got_error_set_errno(errcode,
2259 			    "pthread_mutex_lock");
2260 		s->thread = 0; //NULL;
2261 	}
2262 
2263 	if (s->thread_args.repo) {
2264 		err = got_repo_close(s->thread_args.repo);
2265 		s->thread_args.repo = NULL;
2266 	}
2267 
2268 	if (s->thread_args.pack_fds) {
2269 		const struct got_error *pack_err =
2270 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2271 		if (err == NULL)
2272 			err = pack_err;
2273 		s->thread_args.pack_fds = NULL;
2274 	}
2275 
2276 	if (s->thread_args.graph) {
2277 		got_commit_graph_close(s->thread_args.graph);
2278 		s->thread_args.graph = NULL;
2279 	}
2280 
2281 	return err;
2282 }
2283 
2284 static const struct got_error *
2285 close_log_view(struct tog_view *view)
2286 {
2287 	const struct got_error *err = NULL;
2288 	struct tog_log_view_state *s = &view->state.log;
2289 	int errcode;
2290 
2291 	err = stop_log_thread(s);
2292 
2293 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2294 	if (errcode && err == NULL)
2295 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2296 
2297 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2298 	if (errcode && err == NULL)
2299 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2300 
2301 	free_commits(&s->commits);
2302 	free(s->in_repo_path);
2303 	s->in_repo_path = NULL;
2304 	free(s->start_id);
2305 	s->start_id = NULL;
2306 	free(s->head_ref_name);
2307 	s->head_ref_name = NULL;
2308 	return err;
2309 }
2310 
2311 static const struct got_error *
2312 search_start_log_view(struct tog_view *view)
2313 {
2314 	struct tog_log_view_state *s = &view->state.log;
2315 
2316 	s->matched_entry = NULL;
2317 	s->search_entry = NULL;
2318 	return NULL;
2319 }
2320 
2321 static const struct got_error *
2322 search_next_log_view(struct tog_view *view)
2323 {
2324 	const struct got_error *err = NULL;
2325 	struct tog_log_view_state *s = &view->state.log;
2326 	struct commit_queue_entry *entry;
2327 
2328 	/* Display progress update in log view. */
2329 	show_log_view(view);
2330 	update_panels();
2331 	doupdate();
2332 
2333 	if (s->search_entry) {
2334 		int errcode, ch;
2335 		errcode = pthread_mutex_unlock(&tog_mutex);
2336 		if (errcode)
2337 			return got_error_set_errno(errcode,
2338 			    "pthread_mutex_unlock");
2339 		ch = wgetch(view->window);
2340 		errcode = pthread_mutex_lock(&tog_mutex);
2341 		if (errcode)
2342 			return got_error_set_errno(errcode,
2343 			    "pthread_mutex_lock");
2344 		if (ch == KEY_BACKSPACE) {
2345 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2346 			return NULL;
2347 		}
2348 		if (view->searching == TOG_SEARCH_FORWARD)
2349 			entry = TAILQ_NEXT(s->search_entry, entry);
2350 		else
2351 			entry = TAILQ_PREV(s->search_entry,
2352 			    commit_queue_head, entry);
2353 	} else if (s->matched_entry) {
2354 		if (view->searching == TOG_SEARCH_FORWARD)
2355 			entry = TAILQ_NEXT(s->matched_entry, entry);
2356 		else
2357 			entry = TAILQ_PREV(s->matched_entry,
2358 			    commit_queue_head, entry);
2359 	} else {
2360 		entry = s->selected_entry;
2361 	}
2362 
2363 	while (1) {
2364 		int have_match = 0;
2365 
2366 		if (entry == NULL) {
2367 			if (s->thread_args.log_complete ||
2368 			    view->searching == TOG_SEARCH_BACKWARD) {
2369 				view->search_next_done =
2370 				    (s->matched_entry == NULL ?
2371 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2372 				s->search_entry = NULL;
2373 				return NULL;
2374 			}
2375 			/*
2376 			 * Poke the log thread for more commits and return,
2377 			 * allowing the main loop to make progress. Search
2378 			 * will resume at s->search_entry once we come back.
2379 			 */
2380 			s->thread_args.commits_needed++;
2381 			return trigger_log_thread(view, 0);
2382 		}
2383 
2384 		err = match_commit(&have_match, entry->id, entry->commit,
2385 		    &view->regex);
2386 		if (err)
2387 			break;
2388 		if (have_match) {
2389 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2390 			s->matched_entry = entry;
2391 			break;
2392 		}
2393 
2394 		s->search_entry = entry;
2395 		if (view->searching == TOG_SEARCH_FORWARD)
2396 			entry = TAILQ_NEXT(entry, entry);
2397 		else
2398 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2399 	}
2400 
2401 	if (s->matched_entry) {
2402 		int cur = s->selected_entry->idx;
2403 		while (cur < s->matched_entry->idx) {
2404 			err = input_log_view(NULL, view, KEY_DOWN);
2405 			if (err)
2406 				return err;
2407 			cur++;
2408 		}
2409 		while (cur > s->matched_entry->idx) {
2410 			err = input_log_view(NULL, view, KEY_UP);
2411 			if (err)
2412 				return err;
2413 			cur--;
2414 		}
2415 	}
2416 
2417 	s->search_entry = NULL;
2418 
2419 	return NULL;
2420 }
2421 
2422 static const struct got_error *
2423 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2424     struct got_repository *repo, const char *head_ref_name,
2425     const char *in_repo_path, int log_branches)
2426 {
2427 	const struct got_error *err = NULL;
2428 	struct tog_log_view_state *s = &view->state.log;
2429 	struct got_repository *thread_repo = NULL;
2430 	struct got_commit_graph *thread_graph = NULL;
2431 	int errcode;
2432 
2433 	if (in_repo_path != s->in_repo_path) {
2434 		free(s->in_repo_path);
2435 		s->in_repo_path = strdup(in_repo_path);
2436 		if (s->in_repo_path == NULL)
2437 			return got_error_from_errno("strdup");
2438 	}
2439 
2440 	/* The commit queue only contains commits being displayed. */
2441 	TAILQ_INIT(&s->commits.head);
2442 	s->commits.ncommits = 0;
2443 
2444 	s->repo = repo;
2445 	if (head_ref_name) {
2446 		s->head_ref_name = strdup(head_ref_name);
2447 		if (s->head_ref_name == NULL) {
2448 			err = got_error_from_errno("strdup");
2449 			goto done;
2450 		}
2451 	}
2452 	s->start_id = got_object_id_dup(start_id);
2453 	if (s->start_id == NULL) {
2454 		err = got_error_from_errno("got_object_id_dup");
2455 		goto done;
2456 	}
2457 	s->log_branches = log_branches;
2458 
2459 	STAILQ_INIT(&s->colors);
2460 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2461 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2462 		    get_color_value("TOG_COLOR_COMMIT"));
2463 		if (err)
2464 			goto done;
2465 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2466 		    get_color_value("TOG_COLOR_AUTHOR"));
2467 		if (err) {
2468 			free_colors(&s->colors);
2469 			goto done;
2470 		}
2471 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2472 		    get_color_value("TOG_COLOR_DATE"));
2473 		if (err) {
2474 			free_colors(&s->colors);
2475 			goto done;
2476 		}
2477 	}
2478 
2479 	view->show = show_log_view;
2480 	view->input = input_log_view;
2481 	view->close = close_log_view;
2482 	view->search_start = search_start_log_view;
2483 	view->search_next = search_next_log_view;
2484 
2485 	if (s->thread_args.pack_fds == NULL) {
2486 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2487 		if (err)
2488 			goto done;
2489 	}
2490 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2491 	    s->thread_args.pack_fds);
2492 	if (err)
2493 		goto done;
2494 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2495 	    !s->log_branches);
2496 	if (err)
2497 		goto done;
2498 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2499 	    s->repo, NULL, NULL);
2500 	if (err)
2501 		goto done;
2502 
2503 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2504 	if (errcode) {
2505 		err = got_error_set_errno(errcode, "pthread_cond_init");
2506 		goto done;
2507 	}
2508 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2509 	if (errcode) {
2510 		err = got_error_set_errno(errcode, "pthread_cond_init");
2511 		goto done;
2512 	}
2513 
2514 	s->thread_args.commits_needed = view->nlines;
2515 	s->thread_args.graph = thread_graph;
2516 	s->thread_args.commits = &s->commits;
2517 	s->thread_args.in_repo_path = s->in_repo_path;
2518 	s->thread_args.start_id = s->start_id;
2519 	s->thread_args.repo = thread_repo;
2520 	s->thread_args.log_complete = 0;
2521 	s->thread_args.quit = &s->quit;
2522 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2523 	s->thread_args.selected_entry = &s->selected_entry;
2524 	s->thread_args.searching = &view->searching;
2525 	s->thread_args.search_next_done = &view->search_next_done;
2526 	s->thread_args.regex = &view->regex;
2527 done:
2528 	if (err)
2529 		close_log_view(view);
2530 	return err;
2531 }
2532 
2533 static const struct got_error *
2534 show_log_view(struct tog_view *view)
2535 {
2536 	const struct got_error *err;
2537 	struct tog_log_view_state *s = &view->state.log;
2538 
2539 	if (s->thread == 0) { //NULL) {
2540 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2541 		    &s->thread_args);
2542 		if (errcode)
2543 			return got_error_set_errno(errcode, "pthread_create");
2544 		if (s->thread_args.commits_needed > 0) {
2545 			err = trigger_log_thread(view, 1);
2546 			if (err)
2547 				return err;
2548 		}
2549 	}
2550 
2551 	return draw_commits(view);
2552 }
2553 
2554 static const struct got_error *
2555 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2556 {
2557 	const struct got_error *err = NULL;
2558 	struct tog_log_view_state *s = &view->state.log;
2559 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2560 	struct tog_view *ref_view = NULL;
2561 	struct commit_queue_entry *entry;
2562 	int begin_x = 0, n, nscroll = view->nlines - 1;
2563 
2564 	if (s->thread_args.load_all) {
2565 		if (ch == KEY_BACKSPACE)
2566 			s->thread_args.load_all = 0;
2567 		else if (s->thread_args.log_complete) {
2568 			s->thread_args.load_all = 0;
2569 			log_scroll_down(view, s->commits.ncommits);
2570 			s->selected = MIN(view->nlines - 2,
2571 			    s->commits.ncommits - 1);
2572 			select_commit(s);
2573 		}
2574 		return NULL;
2575 	}
2576 
2577 	switch (ch) {
2578 	case 'q':
2579 		s->quit = 1;
2580 		break;
2581 	case '0':
2582 		view->x = 0;
2583 		break;
2584 	case '$':
2585 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2586 		break;
2587 	case KEY_RIGHT:
2588 	case 'l':
2589 		if (view->x + view->ncols / 2 < view->maxx)
2590 			view->x += 2;  /* move two columns right */
2591 		break;
2592 	case KEY_LEFT:
2593 	case 'h':
2594 		view->x -= MIN(view->x, 2);  /* move two columns back */
2595 		break;
2596 	case 'k':
2597 	case KEY_UP:
2598 	case '<':
2599 	case ',':
2600 	case CTRL('p'):
2601 		if (s->first_displayed_entry == NULL)
2602 			break;
2603 		if (s->selected > 0)
2604 			s->selected--;
2605 		else
2606 			log_scroll_up(s, 1);
2607 		select_commit(s);
2608 		break;
2609 	case 'g':
2610 	case KEY_HOME:
2611 		s->selected = 0;
2612 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2613 		select_commit(s);
2614 		break;
2615 	case CTRL('u'):
2616 	case 'u':
2617 		nscroll /= 2;
2618 		/* FALL THROUGH */
2619 	case KEY_PPAGE:
2620 	case CTRL('b'):
2621 		if (s->first_displayed_entry == NULL)
2622 			break;
2623 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2624 			s->selected = MAX(0, s->selected - nscroll - 1);
2625 		else
2626 			log_scroll_up(s, nscroll);
2627 		select_commit(s);
2628 		break;
2629 	case 'j':
2630 	case KEY_DOWN:
2631 	case '>':
2632 	case '.':
2633 	case CTRL('n'):
2634 		if (s->first_displayed_entry == NULL)
2635 			break;
2636 		if (s->selected < MIN(view->nlines - 2,
2637 		    s->commits.ncommits - 1))
2638 			s->selected++;
2639 		else {
2640 			err = log_scroll_down(view, 1);
2641 			if (err)
2642 				break;
2643 		}
2644 		select_commit(s);
2645 		break;
2646 	case 'G':
2647 	case KEY_END: {
2648 		/* We don't know yet how many commits, so we're forced to
2649 		 * traverse them all. */
2650 		if (!s->thread_args.log_complete) {
2651 			s->thread_args.load_all = 1;
2652 			return trigger_log_thread(view, 0);
2653 		}
2654 
2655 		s->selected = 0;
2656 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2657 		for (n = 0; n < view->nlines - 1; n++) {
2658 			if (entry == NULL)
2659 				break;
2660 			s->first_displayed_entry = entry;
2661 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2662 		}
2663 		if (n > 0)
2664 			s->selected = n - 1;
2665 		select_commit(s);
2666 		break;
2667 	}
2668 	case CTRL('d'):
2669 	case 'd':
2670 		nscroll /= 2;
2671 		/* FALL THROUGH */
2672 	case KEY_NPAGE:
2673 	case CTRL('f'): {
2674 		struct commit_queue_entry *first;
2675 		first = s->first_displayed_entry;
2676 		if (first == NULL)
2677 			break;
2678 		err = log_scroll_down(view, nscroll);
2679 		if (err)
2680 			break;
2681 		if (first == s->first_displayed_entry &&
2682 		    s->selected < MIN(view->nlines - 2,
2683 		    s->commits.ncommits - 1)) {
2684 			/* can't scroll further down */
2685 			s->selected += MIN(s->last_displayed_entry->idx -
2686 			    s->selected_entry->idx, nscroll + 1);
2687 		}
2688 		select_commit(s);
2689 		break;
2690 	}
2691 	case KEY_RESIZE:
2692 		if (s->selected > view->nlines - 2)
2693 			s->selected = view->nlines - 2;
2694 		if (s->selected > s->commits.ncommits - 1)
2695 			s->selected = s->commits.ncommits - 1;
2696 		select_commit(s);
2697 		if (s->commits.ncommits < view->nlines - 1 &&
2698 		    !s->thread_args.log_complete) {
2699 			s->thread_args.commits_needed += (view->nlines - 1) -
2700 			    s->commits.ncommits;
2701 			err = trigger_log_thread(view, 1);
2702 		}
2703 		break;
2704 	case KEY_ENTER:
2705 	case ' ':
2706 	case '\r':
2707 		if (s->selected_entry == NULL)
2708 			break;
2709 		if (view_is_parent_view(view))
2710 			begin_x = view_split_begin_x(view->begin_x);
2711 		err = open_diff_view_for_commit(&diff_view, begin_x,
2712 		    s->selected_entry->commit, s->selected_entry->id,
2713 		    view, s->repo);
2714 		if (err)
2715 			break;
2716 		view->focussed = 0;
2717 		diff_view->focussed = 1;
2718 		if (view_is_parent_view(view)) {
2719 			err = view_close_child(view);
2720 			if (err)
2721 				return err;
2722 			err = view_set_child(view, diff_view);
2723 			if (err)
2724 				return err;
2725 			view->focus_child = 1;
2726 		} else
2727 			*new_view = diff_view;
2728 		break;
2729 	case 't':
2730 		if (s->selected_entry == NULL)
2731 			break;
2732 		if (view_is_parent_view(view))
2733 			begin_x = view_split_begin_x(view->begin_x);
2734 		err = browse_commit_tree(&tree_view, begin_x,
2735 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2736 		    s->repo);
2737 		if (err)
2738 			break;
2739 		view->focussed = 0;
2740 		tree_view->focussed = 1;
2741 		if (view_is_parent_view(view)) {
2742 			err = view_close_child(view);
2743 			if (err)
2744 				return err;
2745 			err = view_set_child(view, tree_view);
2746 			if (err)
2747 				return err;
2748 			view->focus_child = 1;
2749 		} else
2750 			*new_view = tree_view;
2751 		break;
2752 	case KEY_BACKSPACE:
2753 	case CTRL('l'):
2754 	case 'B':
2755 		if (ch == KEY_BACKSPACE &&
2756 		    got_path_is_root_dir(s->in_repo_path))
2757 			break;
2758 		err = stop_log_thread(s);
2759 		if (err)
2760 			return err;
2761 		if (ch == KEY_BACKSPACE) {
2762 			char *parent_path;
2763 			err = got_path_dirname(&parent_path, s->in_repo_path);
2764 			if (err)
2765 				return err;
2766 			free(s->in_repo_path);
2767 			s->in_repo_path = parent_path;
2768 			s->thread_args.in_repo_path = s->in_repo_path;
2769 		} else if (ch == CTRL('l')) {
2770 			struct got_object_id *start_id;
2771 			err = got_repo_match_object_id(&start_id, NULL,
2772 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2773 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2774 			if (err)
2775 				return err;
2776 			free(s->start_id);
2777 			s->start_id = start_id;
2778 			s->thread_args.start_id = s->start_id;
2779 		} else /* 'B' */
2780 			s->log_branches = !s->log_branches;
2781 
2782 		if (s->thread_args.pack_fds == NULL) {
2783 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2784 			if (err)
2785 				return err;
2786 		}
2787 		err = got_repo_open(&s->thread_args.repo,
2788 		    got_repo_get_path(s->repo), NULL,
2789 		    s->thread_args.pack_fds);
2790 		if (err)
2791 			return err;
2792 		tog_free_refs();
2793 		err = tog_load_refs(s->repo, 0);
2794 		if (err)
2795 			return err;
2796 		err = got_commit_graph_open(&s->thread_args.graph,
2797 		    s->in_repo_path, !s->log_branches);
2798 		if (err)
2799 			return err;
2800 		err = got_commit_graph_iter_start(s->thread_args.graph,
2801 		    s->start_id, s->repo, NULL, NULL);
2802 		if (err)
2803 			return err;
2804 		free_commits(&s->commits);
2805 		s->first_displayed_entry = NULL;
2806 		s->last_displayed_entry = NULL;
2807 		s->selected_entry = NULL;
2808 		s->selected = 0;
2809 		s->thread_args.log_complete = 0;
2810 		s->quit = 0;
2811 		s->thread_args.commits_needed = view->nlines;
2812 		break;
2813 	case 'r':
2814 		if (view_is_parent_view(view))
2815 			begin_x = view_split_begin_x(view->begin_x);
2816 		ref_view = view_open(view->nlines, view->ncols,
2817 		    view->begin_y, begin_x, TOG_VIEW_REF);
2818 		if (ref_view == NULL)
2819 			return got_error_from_errno("view_open");
2820 		err = open_ref_view(ref_view, s->repo);
2821 		if (err) {
2822 			view_close(ref_view);
2823 			return err;
2824 		}
2825 		view->focussed = 0;
2826 		ref_view->focussed = 1;
2827 		if (view_is_parent_view(view)) {
2828 			err = view_close_child(view);
2829 			if (err)
2830 				return err;
2831 			err = view_set_child(view, ref_view);
2832 			if (err)
2833 				return err;
2834 			view->focus_child = 1;
2835 		} else
2836 			*new_view = ref_view;
2837 		break;
2838 	default:
2839 		break;
2840 	}
2841 
2842 	return err;
2843 }
2844 
2845 static const struct got_error *
2846 apply_unveil(const char *repo_path, const char *worktree_path)
2847 {
2848 	const struct got_error *error;
2849 
2850 #ifdef PROFILE
2851 	if (unveil("gmon.out", "rwc") != 0)
2852 		return got_error_from_errno2("unveil", "gmon.out");
2853 #endif
2854 	if (repo_path && unveil(repo_path, "r") != 0)
2855 		return got_error_from_errno2("unveil", repo_path);
2856 
2857 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2858 		return got_error_from_errno2("unveil", worktree_path);
2859 
2860 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2861 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2862 
2863 	error = got_privsep_unveil_exec_helpers();
2864 	if (error != NULL)
2865 		return error;
2866 
2867 	if (unveil(NULL, NULL) != 0)
2868 		return got_error_from_errno("unveil");
2869 
2870 	return NULL;
2871 }
2872 
2873 static void
2874 init_curses(void)
2875 {
2876 	/*
2877 	 * Override default signal handlers before starting ncurses.
2878 	 * This should prevent ncurses from installing its own
2879 	 * broken cleanup() signal handler.
2880 	 */
2881 	signal(SIGWINCH, tog_sigwinch);
2882 	signal(SIGPIPE, tog_sigpipe);
2883 	signal(SIGCONT, tog_sigcont);
2884 	signal(SIGINT, tog_sigint);
2885 	signal(SIGTERM, tog_sigterm);
2886 
2887 	initscr();
2888 	cbreak();
2889 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2890 	noecho();
2891 	nonl();
2892 	intrflush(stdscr, FALSE);
2893 	keypad(stdscr, TRUE);
2894 	curs_set(0);
2895 	if (getenv("TOG_COLORS") != NULL) {
2896 		start_color();
2897 		use_default_colors();
2898 	}
2899 }
2900 
2901 static const struct got_error *
2902 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2903     struct got_repository *repo, struct got_worktree *worktree)
2904 {
2905 	const struct got_error *err = NULL;
2906 
2907 	if (argc == 0) {
2908 		*in_repo_path = strdup("/");
2909 		if (*in_repo_path == NULL)
2910 			return got_error_from_errno("strdup");
2911 		return NULL;
2912 	}
2913 
2914 	if (worktree) {
2915 		const char *prefix = got_worktree_get_path_prefix(worktree);
2916 		char *p;
2917 
2918 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2919 		if (err)
2920 			return err;
2921 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2922 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2923 		    p) == -1) {
2924 			err = got_error_from_errno("asprintf");
2925 			*in_repo_path = NULL;
2926 		}
2927 		free(p);
2928 	} else
2929 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2930 
2931 	return err;
2932 }
2933 
2934 static const struct got_error *
2935 cmd_log(int argc, char *argv[])
2936 {
2937 	const struct got_error *error;
2938 	struct got_repository *repo = NULL;
2939 	struct got_worktree *worktree = NULL;
2940 	struct got_object_id *start_id = NULL;
2941 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2942 	char *start_commit = NULL, *label = NULL;
2943 	struct got_reference *ref = NULL;
2944 	const char *head_ref_name = NULL;
2945 	int ch, log_branches = 0;
2946 	struct tog_view *view;
2947 	int *pack_fds = NULL;
2948 
2949 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2950 		switch (ch) {
2951 		case 'b':
2952 			log_branches = 1;
2953 			break;
2954 		case 'c':
2955 			start_commit = optarg;
2956 			break;
2957 		case 'r':
2958 			repo_path = realpath(optarg, NULL);
2959 			if (repo_path == NULL)
2960 				return got_error_from_errno2("realpath",
2961 				    optarg);
2962 			break;
2963 		default:
2964 			usage_log();
2965 			/* NOTREACHED */
2966 		}
2967 	}
2968 
2969 	argc -= optind;
2970 	argv += optind;
2971 
2972 	if (argc > 1)
2973 		usage_log();
2974 
2975 	error = got_repo_pack_fds_open(&pack_fds);
2976 	if (error != NULL)
2977 		goto done;
2978 
2979 	if (repo_path == NULL) {
2980 		cwd = getcwd(NULL, 0);
2981 		if (cwd == NULL)
2982 			return got_error_from_errno("getcwd");
2983 		error = got_worktree_open(&worktree, cwd);
2984 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2985 			goto done;
2986 		if (worktree)
2987 			repo_path =
2988 			    strdup(got_worktree_get_repo_path(worktree));
2989 		else
2990 			repo_path = strdup(cwd);
2991 		if (repo_path == NULL) {
2992 			error = got_error_from_errno("strdup");
2993 			goto done;
2994 		}
2995 	}
2996 
2997 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
2998 	if (error != NULL)
2999 		goto done;
3000 
3001 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3002 	    repo, worktree);
3003 	if (error)
3004 		goto done;
3005 
3006 	init_curses();
3007 
3008 	error = apply_unveil(got_repo_get_path(repo),
3009 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3010 	if (error)
3011 		goto done;
3012 
3013 	/* already loaded by tog_log_with_path()? */
3014 	if (TAILQ_EMPTY(&tog_refs)) {
3015 		error = tog_load_refs(repo, 0);
3016 		if (error)
3017 			goto done;
3018 	}
3019 
3020 	if (start_commit == NULL) {
3021 		error = got_repo_match_object_id(&start_id, &label,
3022 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3023 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3024 		if (error)
3025 			goto done;
3026 		head_ref_name = label;
3027 	} else {
3028 		error = got_ref_open(&ref, repo, start_commit, 0);
3029 		if (error == NULL)
3030 			head_ref_name = got_ref_get_name(ref);
3031 		else if (error->code != GOT_ERR_NOT_REF)
3032 			goto done;
3033 		error = got_repo_match_object_id(&start_id, NULL,
3034 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3035 		if (error)
3036 			goto done;
3037 	}
3038 
3039 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3040 	if (view == NULL) {
3041 		error = got_error_from_errno("view_open");
3042 		goto done;
3043 	}
3044 	error = open_log_view(view, start_id, repo, head_ref_name,
3045 	    in_repo_path, log_branches);
3046 	if (error)
3047 		goto done;
3048 	if (worktree) {
3049 		/* Release work tree lock. */
3050 		got_worktree_close(worktree);
3051 		worktree = NULL;
3052 	}
3053 	error = view_loop(view);
3054 done:
3055 	free(in_repo_path);
3056 	free(repo_path);
3057 	free(cwd);
3058 	free(start_id);
3059 	free(label);
3060 	if (ref)
3061 		got_ref_close(ref);
3062 	if (repo) {
3063 		const struct got_error *close_err = got_repo_close(repo);
3064 		if (error == NULL)
3065 			error = close_err;
3066 	}
3067 	if (worktree)
3068 		got_worktree_close(worktree);
3069 	if (pack_fds) {
3070 		const struct got_error *pack_err =
3071 		    got_repo_pack_fds_close(pack_fds);
3072 		if (error == NULL)
3073 			error = pack_err;
3074 	}
3075 	tog_free_refs();
3076 	return error;
3077 }
3078 
3079 __dead static void
3080 usage_diff(void)
3081 {
3082 	endwin();
3083 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3084 	    "[-w] object1 object2\n", getprogname());
3085 	exit(1);
3086 }
3087 
3088 static int
3089 match_line(const char *line, regex_t *regex, size_t nmatch,
3090     regmatch_t *regmatch)
3091 {
3092 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3093 }
3094 
3095 struct tog_color *
3096 match_color(struct tog_colors *colors, const char *line)
3097 {
3098 	struct tog_color *tc = NULL;
3099 
3100 	STAILQ_FOREACH(tc, colors, entry) {
3101 		if (match_line(line, &tc->regex, 0, NULL))
3102 			return tc;
3103 	}
3104 
3105 	return NULL;
3106 }
3107 
3108 static const struct got_error *
3109 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3110     WINDOW *window, int skipcol, regmatch_t *regmatch)
3111 {
3112 	const struct got_error *err = NULL;
3113 	char *exstr = NULL;
3114 	wchar_t *wline = NULL;
3115 	int rme, rms, n, width, scrollx;
3116 	int width0 = 0, width1 = 0, width2 = 0;
3117 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3118 
3119 	*wtotal = 0;
3120 
3121 	rms = regmatch->rm_so;
3122 	rme = regmatch->rm_eo;
3123 
3124 	err = expand_tab(&exstr, line);
3125 	if (err)
3126 		return err;
3127 
3128 	/* Split the line into 3 segments, according to match offsets. */
3129 	seg0 = strndup(exstr, rms);
3130 	if (seg0 == NULL) {
3131 		err = got_error_from_errno("strndup");
3132 		goto done;
3133 	}
3134 	seg1 = strndup(exstr + rms, rme - rms);
3135 	if (seg1 == NULL) {
3136 		err = got_error_from_errno("strndup");
3137 		goto done;
3138 	}
3139 	seg2 = strdup(exstr + rme);
3140 	if (seg2 == NULL) {
3141 		err = got_error_from_errno("strndup");
3142 		goto done;
3143 	}
3144 
3145 	/* draw up to matched token if we haven't scrolled past it */
3146 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3147 	    col_tab_align, 1);
3148 	if (err)
3149 		goto done;
3150 	n = MAX(width0 - skipcol, 0);
3151 	if (n) {
3152 		free(wline);
3153 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3154 		    wlimit, col_tab_align, 1);
3155 		if (err)
3156 			goto done;
3157 		waddwstr(window, &wline[scrollx]);
3158 		wlimit -= width;
3159 		*wtotal += width;
3160 	}
3161 
3162 	if (wlimit > 0) {
3163 		int i = 0, w = 0;
3164 		size_t wlen;
3165 
3166 		free(wline);
3167 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3168 		    col_tab_align, 1);
3169 		if (err)
3170 			goto done;
3171 		wlen = wcslen(wline);
3172 		while (i < wlen) {
3173 			width = wcwidth(wline[i]);
3174 			if (width == -1) {
3175 				/* should not happen, tabs are expanded */
3176 				err = got_error(GOT_ERR_RANGE);
3177 				goto done;
3178 			}
3179 			if (width0 + w + width > skipcol)
3180 				break;
3181 			w += width; 
3182 			i++;
3183 		}
3184 		/* draw (visible part of) matched token (if scrolled into it) */
3185 		if (width1 - w > 0) {
3186 			wattron(window, A_STANDOUT);
3187 			waddwstr(window, &wline[i]);
3188 			wattroff(window, A_STANDOUT);
3189 			wlimit -= (width1 - w);
3190 			*wtotal += (width1 - w);
3191 		}
3192 	}
3193 
3194 	if (wlimit > 0) {  /* draw rest of line */
3195 		free(wline);
3196 		if (skipcol > width0 + width1) {
3197 			err = format_line(&wline, &width2, &scrollx, seg2,
3198 			    skipcol - (width0 + width1), wlimit,
3199 			    col_tab_align, 1);
3200 			if (err)
3201 				goto done;
3202 			waddwstr(window, &wline[scrollx]);
3203 		} else {
3204 			err = format_line(&wline, &width2, NULL, seg2, 0,
3205 			    wlimit, col_tab_align, 1);
3206 			if (err)
3207 				goto done;
3208 			waddwstr(window, wline);
3209 		}
3210 		*wtotal += width2;
3211 	}
3212 done:
3213 	free(wline);
3214 	free(exstr);
3215 	free(seg0);
3216 	free(seg1);
3217 	free(seg2);
3218 	return err;
3219 }
3220 
3221 static const struct got_error *
3222 draw_file(struct tog_view *view, const char *header)
3223 {
3224 	struct tog_diff_view_state *s = &view->state.diff;
3225 	regmatch_t *regmatch = &view->regmatch;
3226 	const struct got_error *err;
3227 	int nprinted = 0;
3228 	char *line;
3229 	size_t linesize = 0;
3230 	ssize_t linelen;
3231 	struct tog_color *tc;
3232 	wchar_t *wline;
3233 	int width;
3234 	int max_lines = view->nlines;
3235 	int nlines = s->nlines;
3236 	off_t line_offset;
3237 
3238 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3239 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3240 		return got_error_from_errno("fseek");
3241 
3242 	werase(view->window);
3243 
3244 	if (header) {
3245 		if (asprintf(&line, "[%d/%d] %s",
3246 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3247 		    header) == -1)
3248 			return got_error_from_errno("asprintf");
3249 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3250 		    0, 0);
3251 		free(line);
3252 		if (err)
3253 			return err;
3254 
3255 		if (view_needs_focus_indication(view))
3256 			wstandout(view->window);
3257 		waddwstr(view->window, wline);
3258 		free(wline);
3259 		wline = NULL;
3260 		if (view_needs_focus_indication(view))
3261 			wstandend(view->window);
3262 		if (width <= view->ncols - 1)
3263 			waddch(view->window, '\n');
3264 
3265 		if (max_lines <= 1)
3266 			return NULL;
3267 		max_lines--;
3268 	}
3269 
3270 	s->eof = 0;
3271 	view->maxx = 0;
3272 	line = NULL;
3273 	while (max_lines > 0 && nprinted < max_lines) {
3274 		linelen = getline(&line, &linesize, s->f);
3275 		if (linelen == -1) {
3276 			if (feof(s->f)) {
3277 				s->eof = 1;
3278 				break;
3279 			}
3280 			free(line);
3281 			return got_ferror(s->f, GOT_ERR_IO);
3282 		}
3283 
3284 		/* Set view->maxx based on full line length. */
3285 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3286 		    view->x ? 1 : 0);
3287 		if (err) {
3288 			free(line);
3289 			return err;
3290 		}
3291 		view->maxx = MAX(view->maxx, width);
3292 		free(wline);
3293 		wline = NULL;
3294 
3295 		tc = match_color(&s->colors, line);
3296 		if (tc)
3297 			wattr_on(view->window,
3298 			    COLOR_PAIR(tc->colorpair), NULL);
3299 		if (s->first_displayed_line + nprinted == s->matched_line &&
3300 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3301 			err = add_matched_line(&width, line, view->ncols, 0,
3302 			    view->window, view->x, regmatch);
3303 			if (err) {
3304 				free(line);
3305 				return err;
3306 			}
3307 		} else {
3308 			int skip;
3309 			err = format_line(&wline, &width, &skip, line,
3310 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3311 			if (err) {
3312 				free(line);
3313 				return err;
3314 			}
3315 			waddwstr(view->window, &wline[skip]);
3316 			free(wline);
3317 			wline = NULL;
3318 		}
3319 		if (tc)
3320 			wattr_off(view->window,
3321 			    COLOR_PAIR(tc->colorpair), NULL);
3322 		if (width <= view->ncols - 1)
3323 			waddch(view->window, '\n');
3324 		nprinted++;
3325 	}
3326 	free(line);
3327 	if (nprinted >= 1)
3328 		s->last_displayed_line = s->first_displayed_line +
3329 		    (nprinted - 1);
3330 	else
3331 		s->last_displayed_line = s->first_displayed_line;
3332 
3333 	view_vborder(view);
3334 
3335 	if (s->eof) {
3336 		while (nprinted < view->nlines) {
3337 			waddch(view->window, '\n');
3338 			nprinted++;
3339 		}
3340 
3341 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3342 		    view->ncols, 0, 0);
3343 		if (err) {
3344 			return err;
3345 		}
3346 
3347 		wstandout(view->window);
3348 		waddwstr(view->window, wline);
3349 		free(wline);
3350 		wline = NULL;
3351 		wstandend(view->window);
3352 	}
3353 
3354 	return NULL;
3355 }
3356 
3357 static char *
3358 get_datestr(time_t *time, char *datebuf)
3359 {
3360 	struct tm mytm, *tm;
3361 	char *p, *s;
3362 
3363 	tm = gmtime_r(time, &mytm);
3364 	if (tm == NULL)
3365 		return NULL;
3366 	s = asctime_r(tm, datebuf);
3367 	if (s == NULL)
3368 		return NULL;
3369 	p = strchr(s, '\n');
3370 	if (p)
3371 		*p = '\0';
3372 	return s;
3373 }
3374 
3375 static const struct got_error *
3376 get_changed_paths(struct got_pathlist_head *paths,
3377     struct got_commit_object *commit, struct got_repository *repo)
3378 {
3379 	const struct got_error *err = NULL;
3380 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3381 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3382 	struct got_object_qid *qid;
3383 
3384 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3385 	if (qid != NULL) {
3386 		struct got_commit_object *pcommit;
3387 		err = got_object_open_as_commit(&pcommit, repo,
3388 		    &qid->id);
3389 		if (err)
3390 			return err;
3391 
3392 		tree_id1 = got_object_id_dup(
3393 		    got_object_commit_get_tree_id(pcommit));
3394 		if (tree_id1 == NULL) {
3395 			got_object_commit_close(pcommit);
3396 			return got_error_from_errno("got_object_id_dup");
3397 		}
3398 		got_object_commit_close(pcommit);
3399 
3400 	}
3401 
3402 	if (tree_id1) {
3403 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3404 		if (err)
3405 			goto done;
3406 	}
3407 
3408 	tree_id2 = got_object_commit_get_tree_id(commit);
3409 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3410 	if (err)
3411 		goto done;
3412 
3413 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3414 	    got_diff_tree_collect_changed_paths, paths, 0);
3415 done:
3416 	if (tree1)
3417 		got_object_tree_close(tree1);
3418 	if (tree2)
3419 		got_object_tree_close(tree2);
3420 	free(tree_id1);
3421 	return err;
3422 }
3423 
3424 static const struct got_error *
3425 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3426 {
3427 	off_t *p;
3428 
3429 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3430 	if (p == NULL)
3431 		return got_error_from_errno("reallocarray");
3432 	*line_offsets = p;
3433 	(*line_offsets)[*nlines] = off;
3434 	(*nlines)++;
3435 	return NULL;
3436 }
3437 
3438 static const struct got_error *
3439 write_commit_info(off_t **line_offsets, size_t *nlines,
3440     struct got_object_id *commit_id, struct got_reflist_head *refs,
3441     struct got_repository *repo, FILE *outfile)
3442 {
3443 	const struct got_error *err = NULL;
3444 	char datebuf[26], *datestr;
3445 	struct got_commit_object *commit;
3446 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3447 	time_t committer_time;
3448 	const char *author, *committer;
3449 	char *refs_str = NULL;
3450 	struct got_pathlist_head changed_paths;
3451 	struct got_pathlist_entry *pe;
3452 	off_t outoff = 0;
3453 	int n;
3454 
3455 	TAILQ_INIT(&changed_paths);
3456 
3457 	if (refs) {
3458 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3459 		if (err)
3460 			return err;
3461 	}
3462 
3463 	err = got_object_open_as_commit(&commit, repo, commit_id);
3464 	if (err)
3465 		return err;
3466 
3467 	err = got_object_id_str(&id_str, commit_id);
3468 	if (err) {
3469 		err = got_error_from_errno("got_object_id_str");
3470 		goto done;
3471 	}
3472 
3473 	err = add_line_offset(line_offsets, nlines, 0);
3474 	if (err)
3475 		goto done;
3476 
3477 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3478 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3479 	if (n < 0) {
3480 		err = got_error_from_errno("fprintf");
3481 		goto done;
3482 	}
3483 	outoff += n;
3484 	err = add_line_offset(line_offsets, nlines, outoff);
3485 	if (err)
3486 		goto done;
3487 
3488 	n = fprintf(outfile, "from: %s\n",
3489 	    got_object_commit_get_author(commit));
3490 	if (n < 0) {
3491 		err = got_error_from_errno("fprintf");
3492 		goto done;
3493 	}
3494 	outoff += n;
3495 	err = add_line_offset(line_offsets, nlines, outoff);
3496 	if (err)
3497 		goto done;
3498 
3499 	committer_time = got_object_commit_get_committer_time(commit);
3500 	datestr = get_datestr(&committer_time, datebuf);
3501 	if (datestr) {
3502 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3503 		if (n < 0) {
3504 			err = got_error_from_errno("fprintf");
3505 			goto done;
3506 		}
3507 		outoff += n;
3508 		err = add_line_offset(line_offsets, nlines, outoff);
3509 		if (err)
3510 			goto done;
3511 	}
3512 	author = got_object_commit_get_author(commit);
3513 	committer = got_object_commit_get_committer(commit);
3514 	if (strcmp(author, committer) != 0) {
3515 		n = fprintf(outfile, "via: %s\n", committer);
3516 		if (n < 0) {
3517 			err = got_error_from_errno("fprintf");
3518 			goto done;
3519 		}
3520 		outoff += n;
3521 		err = add_line_offset(line_offsets, nlines, outoff);
3522 		if (err)
3523 			goto done;
3524 	}
3525 	if (got_object_commit_get_nparents(commit) > 1) {
3526 		const struct got_object_id_queue *parent_ids;
3527 		struct got_object_qid *qid;
3528 		int pn = 1;
3529 		parent_ids = got_object_commit_get_parent_ids(commit);
3530 		STAILQ_FOREACH(qid, parent_ids, entry) {
3531 			err = got_object_id_str(&id_str, &qid->id);
3532 			if (err)
3533 				goto done;
3534 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3535 			if (n < 0) {
3536 				err = got_error_from_errno("fprintf");
3537 				goto done;
3538 			}
3539 			outoff += n;
3540 			err = add_line_offset(line_offsets, nlines, outoff);
3541 			if (err)
3542 				goto done;
3543 			free(id_str);
3544 			id_str = NULL;
3545 		}
3546 	}
3547 
3548 	err = got_object_commit_get_logmsg(&logmsg, commit);
3549 	if (err)
3550 		goto done;
3551 	s = logmsg;
3552 	while ((line = strsep(&s, "\n")) != NULL) {
3553 		n = fprintf(outfile, "%s\n", line);
3554 		if (n < 0) {
3555 			err = got_error_from_errno("fprintf");
3556 			goto done;
3557 		}
3558 		outoff += n;
3559 		err = add_line_offset(line_offsets, nlines, outoff);
3560 		if (err)
3561 			goto done;
3562 	}
3563 
3564 	err = get_changed_paths(&changed_paths, commit, repo);
3565 	if (err)
3566 		goto done;
3567 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3568 		struct got_diff_changed_path *cp = pe->data;
3569 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3570 		if (n < 0) {
3571 			err = got_error_from_errno("fprintf");
3572 			goto done;
3573 		}
3574 		outoff += n;
3575 		err = add_line_offset(line_offsets, nlines, outoff);
3576 		if (err)
3577 			goto done;
3578 		free((char *)pe->path);
3579 		free(pe->data);
3580 	}
3581 
3582 	fputc('\n', outfile);
3583 	outoff++;
3584 	err = add_line_offset(line_offsets, nlines, outoff);
3585 done:
3586 	got_pathlist_free(&changed_paths);
3587 	free(id_str);
3588 	free(logmsg);
3589 	free(refs_str);
3590 	got_object_commit_close(commit);
3591 	if (err) {
3592 		free(*line_offsets);
3593 		*line_offsets = NULL;
3594 		*nlines = 0;
3595 	}
3596 	return err;
3597 }
3598 
3599 static const struct got_error *
3600 create_diff(struct tog_diff_view_state *s)
3601 {
3602 	const struct got_error *err = NULL;
3603 	FILE *f = NULL;
3604 	int obj_type;
3605 
3606 	free(s->line_offsets);
3607 	s->line_offsets = malloc(sizeof(off_t));
3608 	if (s->line_offsets == NULL)
3609 		return got_error_from_errno("malloc");
3610 	s->nlines = 0;
3611 
3612 	f = got_opentemp();
3613 	if (f == NULL) {
3614 		err = got_error_from_errno("got_opentemp");
3615 		goto done;
3616 	}
3617 	if (s->f && fclose(s->f) == EOF) {
3618 		err = got_error_from_errno("fclose");
3619 		goto done;
3620 	}
3621 	s->f = f;
3622 
3623 	if (s->id1)
3624 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3625 	else
3626 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3627 	if (err)
3628 		goto done;
3629 
3630 	switch (obj_type) {
3631 	case GOT_OBJ_TYPE_BLOB:
3632 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3633 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3634 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3635 		    s->repo, s->f);
3636 		break;
3637 	case GOT_OBJ_TYPE_TREE:
3638 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3639 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3640 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3641 		break;
3642 	case GOT_OBJ_TYPE_COMMIT: {
3643 		const struct got_object_id_queue *parent_ids;
3644 		struct got_object_qid *pid;
3645 		struct got_commit_object *commit2;
3646 		struct got_reflist_head *refs;
3647 
3648 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3649 		if (err)
3650 			goto done;
3651 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3652 		/* Show commit info if we're diffing to a parent/root commit. */
3653 		if (s->id1 == NULL) {
3654 			err = write_commit_info(&s->line_offsets, &s->nlines,
3655 			    s->id2, refs, s->repo, s->f);
3656 			if (err)
3657 				goto done;
3658 		} else {
3659 			parent_ids = got_object_commit_get_parent_ids(commit2);
3660 			STAILQ_FOREACH(pid, parent_ids, entry) {
3661 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3662 					err = write_commit_info(
3663 					    &s->line_offsets, &s->nlines,
3664 					    s->id2, refs, s->repo, s->f);
3665 					if (err)
3666 						goto done;
3667 					break;
3668 				}
3669 			}
3670 		}
3671 		got_object_commit_close(commit2);
3672 
3673 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3674 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3675 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3676 		break;
3677 	}
3678 	default:
3679 		err = got_error(GOT_ERR_OBJ_TYPE);
3680 		break;
3681 	}
3682 	if (err)
3683 		goto done;
3684 done:
3685 	if (s->f && fflush(s->f) != 0 && err == NULL)
3686 		err = got_error_from_errno("fflush");
3687 	return err;
3688 }
3689 
3690 static void
3691 diff_view_indicate_progress(struct tog_view *view)
3692 {
3693 	mvwaddstr(view->window, 0, 0, "diffing...");
3694 	update_panels();
3695 	doupdate();
3696 }
3697 
3698 static const struct got_error *
3699 search_start_diff_view(struct tog_view *view)
3700 {
3701 	struct tog_diff_view_state *s = &view->state.diff;
3702 
3703 	s->matched_line = 0;
3704 	return NULL;
3705 }
3706 
3707 static const struct got_error *
3708 search_next_diff_view(struct tog_view *view)
3709 {
3710 	struct tog_diff_view_state *s = &view->state.diff;
3711 	const struct got_error *err = NULL;
3712 	int lineno;
3713 	char *line = NULL;
3714 	size_t linesize = 0;
3715 	ssize_t linelen;
3716 
3717 	if (!view->searching) {
3718 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3719 		return NULL;
3720 	}
3721 
3722 	if (s->matched_line) {
3723 		if (view->searching == TOG_SEARCH_FORWARD)
3724 			lineno = s->matched_line + 1;
3725 		else
3726 			lineno = s->matched_line - 1;
3727 	} else
3728 		lineno = s->first_displayed_line;
3729 
3730 	while (1) {
3731 		off_t offset;
3732 
3733 		if (lineno <= 0 || lineno > s->nlines) {
3734 			if (s->matched_line == 0) {
3735 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3736 				break;
3737 			}
3738 
3739 			if (view->searching == TOG_SEARCH_FORWARD)
3740 				lineno = 1;
3741 			else
3742 				lineno = s->nlines;
3743 		}
3744 
3745 		offset = s->line_offsets[lineno - 1];
3746 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3747 			free(line);
3748 			return got_error_from_errno("fseeko");
3749 		}
3750 		linelen = getline(&line, &linesize, s->f);
3751 		if (linelen != -1) {
3752 			char *exstr;
3753 			err = expand_tab(&exstr, line);
3754 			if (err)
3755 				break;
3756 			if (match_line(exstr, &view->regex, 1,
3757 			    &view->regmatch)) {
3758 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3759 				s->matched_line = lineno;
3760 				free(exstr);
3761 				break;
3762 			}
3763 			free(exstr);
3764 		}
3765 		if (view->searching == TOG_SEARCH_FORWARD)
3766 			lineno++;
3767 		else
3768 			lineno--;
3769 	}
3770 	free(line);
3771 
3772 	if (s->matched_line) {
3773 		s->first_displayed_line = s->matched_line;
3774 		s->selected_line = 1;
3775 	}
3776 
3777 	return err;
3778 }
3779 
3780 static const struct got_error *
3781 close_diff_view(struct tog_view *view)
3782 {
3783 	const struct got_error *err = NULL;
3784 	struct tog_diff_view_state *s = &view->state.diff;
3785 
3786 	free(s->id1);
3787 	s->id1 = NULL;
3788 	free(s->id2);
3789 	s->id2 = NULL;
3790 	if (s->f && fclose(s->f) == EOF)
3791 		err = got_error_from_errno("fclose");
3792 	s->f = NULL;
3793 	if (s->f1 && fclose(s->f1) == EOF)
3794 		err = got_error_from_errno("fclose");
3795 	s->f1 = NULL;
3796 	if (s->f2 && fclose(s->f2) == EOF)
3797 		err = got_error_from_errno("fclose");
3798 	s->f2 = NULL;
3799 	free_colors(&s->colors);
3800 	free(s->line_offsets);
3801 	s->line_offsets = NULL;
3802 	s->nlines = 0;
3803 	return err;
3804 }
3805 
3806 static const struct got_error *
3807 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3808     struct got_object_id *id2, const char *label1, const char *label2,
3809     int diff_context, int ignore_whitespace, int force_text_diff,
3810     struct tog_view *log_view, struct got_repository *repo)
3811 {
3812 	const struct got_error *err;
3813 	struct tog_diff_view_state *s = &view->state.diff;
3814 
3815 	memset(s, 0, sizeof(*s));
3816 
3817 	if (id1 != NULL && id2 != NULL) {
3818 	    int type1, type2;
3819 	    err = got_object_get_type(&type1, repo, id1);
3820 	    if (err)
3821 		return err;
3822 	    err = got_object_get_type(&type2, repo, id2);
3823 	    if (err)
3824 		return err;
3825 
3826 	    if (type1 != type2)
3827 		return got_error(GOT_ERR_OBJ_TYPE);
3828 	}
3829 	s->first_displayed_line = 1;
3830 	s->last_displayed_line = view->nlines;
3831 	s->selected_line = 1;
3832 	s->repo = repo;
3833 	s->id1 = id1;
3834 	s->id2 = id2;
3835 	s->label1 = label1;
3836 	s->label2 = label2;
3837 
3838 	if (id1) {
3839 		s->id1 = got_object_id_dup(id1);
3840 		if (s->id1 == NULL)
3841 			return got_error_from_errno("got_object_id_dup");
3842 	} else
3843 		s->id1 = NULL;
3844 
3845 	s->id2 = got_object_id_dup(id2);
3846 	if (s->id2 == NULL) {
3847 		err = got_error_from_errno("got_object_id_dup");
3848 		goto done;
3849 	}
3850 
3851 	s->f1 = got_opentemp();
3852 	if (s->f1 == NULL) {
3853 		err = got_error_from_errno("got_opentemp");
3854 		goto done;
3855 	}
3856 
3857 	s->f2 = got_opentemp();
3858 	if (s->f2 == NULL) {
3859 		err = got_error_from_errno("got_opentemp");
3860 		goto done;
3861 	}
3862 
3863 	s->first_displayed_line = 1;
3864 	s->last_displayed_line = view->nlines;
3865 	s->diff_context = diff_context;
3866 	s->ignore_whitespace = ignore_whitespace;
3867 	s->force_text_diff = force_text_diff;
3868 	s->log_view = log_view;
3869 	s->repo = repo;
3870 
3871 	STAILQ_INIT(&s->colors);
3872 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3873 		err = add_color(&s->colors,
3874 		    "^-", TOG_COLOR_DIFF_MINUS,
3875 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3876 		if (err)
3877 			goto done;
3878 		err = add_color(&s->colors, "^\\+",
3879 		    TOG_COLOR_DIFF_PLUS,
3880 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3881 		if (err)
3882 			goto done;
3883 		err = add_color(&s->colors,
3884 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3885 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3886 		if (err)
3887 			goto done;
3888 
3889 		err = add_color(&s->colors,
3890 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3891 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3892 		    get_color_value("TOG_COLOR_DIFF_META"));
3893 		if (err)
3894 			goto done;
3895 
3896 		err = add_color(&s->colors,
3897 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3898 		    get_color_value("TOG_COLOR_AUTHOR"));
3899 		if (err)
3900 			goto done;
3901 
3902 		err = add_color(&s->colors,
3903 		    "^date: ", TOG_COLOR_DATE,
3904 		    get_color_value("TOG_COLOR_DATE"));
3905 		if (err)
3906 			goto done;
3907 	}
3908 
3909 	if (log_view && view_is_splitscreen(view))
3910 		show_log_view(log_view); /* draw vborder */
3911 	diff_view_indicate_progress(view);
3912 
3913 	err = create_diff(s);
3914 
3915 	view->show = show_diff_view;
3916 	view->input = input_diff_view;
3917 	view->close = close_diff_view;
3918 	view->search_start = search_start_diff_view;
3919 	view->search_next = search_next_diff_view;
3920 done:
3921 	if (err)
3922 		close_diff_view(view);
3923 	return err;
3924 }
3925 
3926 static const struct got_error *
3927 show_diff_view(struct tog_view *view)
3928 {
3929 	const struct got_error *err;
3930 	struct tog_diff_view_state *s = &view->state.diff;
3931 	char *id_str1 = NULL, *id_str2, *header;
3932 	const char *label1, *label2;
3933 
3934 	if (s->id1) {
3935 		err = got_object_id_str(&id_str1, s->id1);
3936 		if (err)
3937 			return err;
3938 		label1 = s->label1 ? : id_str1;
3939 	} else
3940 		label1 = "/dev/null";
3941 
3942 	err = got_object_id_str(&id_str2, s->id2);
3943 	if (err)
3944 		return err;
3945 	label2 = s->label2 ? : id_str2;
3946 
3947 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3948 		err = got_error_from_errno("asprintf");
3949 		free(id_str1);
3950 		free(id_str2);
3951 		return err;
3952 	}
3953 	free(id_str1);
3954 	free(id_str2);
3955 
3956 	err = draw_file(view, header);
3957 	free(header);
3958 	return err;
3959 }
3960 
3961 static const struct got_error *
3962 set_selected_commit(struct tog_diff_view_state *s,
3963     struct commit_queue_entry *entry)
3964 {
3965 	const struct got_error *err;
3966 	const struct got_object_id_queue *parent_ids;
3967 	struct got_commit_object *selected_commit;
3968 	struct got_object_qid *pid;
3969 
3970 	free(s->id2);
3971 	s->id2 = got_object_id_dup(entry->id);
3972 	if (s->id2 == NULL)
3973 		return got_error_from_errno("got_object_id_dup");
3974 
3975 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3976 	if (err)
3977 		return err;
3978 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3979 	free(s->id1);
3980 	pid = STAILQ_FIRST(parent_ids);
3981 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3982 	got_object_commit_close(selected_commit);
3983 	return NULL;
3984 }
3985 
3986 static const struct got_error *
3987 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3988 {
3989 	const struct got_error *err = NULL;
3990 	struct tog_diff_view_state *s = &view->state.diff;
3991 	struct tog_log_view_state *ls;
3992 	struct commit_queue_entry *old_selected_entry;
3993 	char *line = NULL;
3994 	size_t linesize = 0;
3995 	ssize_t linelen;
3996 	int i, nscroll = view->nlines - 1;
3997 
3998 	switch (ch) {
3999 	case '0':
4000 		view->x = 0;
4001 		break;
4002 	case '$':
4003 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4004 		break;
4005 	case KEY_RIGHT:
4006 	case 'l':
4007 		if (view->x + view->ncols / 3 < view->maxx)
4008 			view->x += 2;  /* move two columns right */
4009 		break;
4010 	case KEY_LEFT:
4011 	case 'h':
4012 		view->x -= MIN(view->x, 2);  /* move two columns back */
4013 		break;
4014 	case 'a':
4015 	case 'w':
4016 		if (ch == 'a')
4017 			s->force_text_diff = !s->force_text_diff;
4018 		if (ch == 'w')
4019 			s->ignore_whitespace = !s->ignore_whitespace;
4020 		wclear(view->window);
4021 		s->first_displayed_line = 1;
4022 		s->last_displayed_line = view->nlines;
4023 		s->matched_line = 0;
4024 		diff_view_indicate_progress(view);
4025 		err = create_diff(s);
4026 		break;
4027 	case 'g':
4028 	case KEY_HOME:
4029 		s->first_displayed_line = 1;
4030 		break;
4031 	case 'G':
4032 	case KEY_END:
4033 		if (s->eof)
4034 			break;
4035 
4036 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4037 		s->eof = 1;
4038 		break;
4039 	case 'k':
4040 	case KEY_UP:
4041 	case CTRL('p'):
4042 		if (s->first_displayed_line > 1)
4043 			s->first_displayed_line--;
4044 		break;
4045 	case CTRL('u'):
4046 	case 'u':
4047 		nscroll /= 2;
4048 		/* FALL THROUGH */
4049 	case KEY_PPAGE:
4050 	case CTRL('b'):
4051 		if (s->first_displayed_line == 1)
4052 			break;
4053 		i = 0;
4054 		while (i++ < nscroll && s->first_displayed_line > 1)
4055 			s->first_displayed_line--;
4056 		break;
4057 	case 'j':
4058 	case KEY_DOWN:
4059 	case CTRL('n'):
4060 		if (!s->eof)
4061 			s->first_displayed_line++;
4062 		break;
4063 	case CTRL('d'):
4064 	case 'd':
4065 		nscroll /= 2;
4066 		/* FALL THROUGH */
4067 	case KEY_NPAGE:
4068 	case CTRL('f'):
4069 	case ' ':
4070 		if (s->eof)
4071 			break;
4072 		i = 0;
4073 		while (!s->eof && i++ < nscroll) {
4074 			linelen = getline(&line, &linesize, s->f);
4075 			s->first_displayed_line++;
4076 			if (linelen == -1) {
4077 				if (feof(s->f)) {
4078 					s->eof = 1;
4079 				} else
4080 					err = got_ferror(s->f, GOT_ERR_IO);
4081 				break;
4082 			}
4083 		}
4084 		free(line);
4085 		break;
4086 	case '[':
4087 		if (s->diff_context > 0) {
4088 			s->diff_context--;
4089 			s->matched_line = 0;
4090 			diff_view_indicate_progress(view);
4091 			err = create_diff(s);
4092 			if (s->first_displayed_line + view->nlines - 1 >
4093 			    s->nlines) {
4094 				s->first_displayed_line = 1;
4095 				s->last_displayed_line = view->nlines;
4096 			}
4097 		}
4098 		break;
4099 	case ']':
4100 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4101 			s->diff_context++;
4102 			s->matched_line = 0;
4103 			diff_view_indicate_progress(view);
4104 			err = create_diff(s);
4105 		}
4106 		break;
4107 	case '<':
4108 	case ',':
4109 		if (s->log_view == NULL)
4110 			break;
4111 		ls = &s->log_view->state.log;
4112 		old_selected_entry = ls->selected_entry;
4113 
4114 		err = input_log_view(NULL, s->log_view, KEY_UP);
4115 		if (err)
4116 			break;
4117 
4118 		if (old_selected_entry == ls->selected_entry)
4119 			break;
4120 
4121 		err = set_selected_commit(s, ls->selected_entry);
4122 		if (err)
4123 			break;
4124 
4125 		s->first_displayed_line = 1;
4126 		s->last_displayed_line = view->nlines;
4127 		s->matched_line = 0;
4128 		view->x = 0;
4129 
4130 		diff_view_indicate_progress(view);
4131 		err = create_diff(s);
4132 		break;
4133 	case '>':
4134 	case '.':
4135 		if (s->log_view == NULL)
4136 			break;
4137 		ls = &s->log_view->state.log;
4138 		old_selected_entry = ls->selected_entry;
4139 
4140 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4141 		if (err)
4142 			break;
4143 
4144 		if (old_selected_entry == ls->selected_entry)
4145 			break;
4146 
4147 		err = set_selected_commit(s, ls->selected_entry);
4148 		if (err)
4149 			break;
4150 
4151 		s->first_displayed_line = 1;
4152 		s->last_displayed_line = view->nlines;
4153 		s->matched_line = 0;
4154 		view->x = 0;
4155 
4156 		diff_view_indicate_progress(view);
4157 		err = create_diff(s);
4158 		break;
4159 	default:
4160 		break;
4161 	}
4162 
4163 	return err;
4164 }
4165 
4166 static const struct got_error *
4167 cmd_diff(int argc, char *argv[])
4168 {
4169 	const struct got_error *error = NULL;
4170 	struct got_repository *repo = NULL;
4171 	struct got_worktree *worktree = NULL;
4172 	struct got_object_id *id1 = NULL, *id2 = NULL;
4173 	char *repo_path = NULL, *cwd = NULL;
4174 	char *id_str1 = NULL, *id_str2 = NULL;
4175 	char *label1 = NULL, *label2 = NULL;
4176 	int diff_context = 3, ignore_whitespace = 0;
4177 	int ch, force_text_diff = 0;
4178 	const char *errstr;
4179 	struct tog_view *view;
4180 	int *pack_fds = NULL;
4181 
4182 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4183 		switch (ch) {
4184 		case 'a':
4185 			force_text_diff = 1;
4186 			break;
4187 		case 'C':
4188 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4189 			    &errstr);
4190 			if (errstr != NULL)
4191 				errx(1, "number of context lines is %s: %s",
4192 				    errstr, errstr);
4193 			break;
4194 		case 'r':
4195 			repo_path = realpath(optarg, NULL);
4196 			if (repo_path == NULL)
4197 				return got_error_from_errno2("realpath",
4198 				    optarg);
4199 			got_path_strip_trailing_slashes(repo_path);
4200 			break;
4201 		case 'w':
4202 			ignore_whitespace = 1;
4203 			break;
4204 		default:
4205 			usage_diff();
4206 			/* NOTREACHED */
4207 		}
4208 	}
4209 
4210 	argc -= optind;
4211 	argv += optind;
4212 
4213 	if (argc == 0) {
4214 		usage_diff(); /* TODO show local worktree changes */
4215 	} else if (argc == 2) {
4216 		id_str1 = argv[0];
4217 		id_str2 = argv[1];
4218 	} else
4219 		usage_diff();
4220 
4221 	error = got_repo_pack_fds_open(&pack_fds);
4222 	if (error)
4223 		goto done;
4224 
4225 	if (repo_path == NULL) {
4226 		cwd = getcwd(NULL, 0);
4227 		if (cwd == NULL)
4228 			return got_error_from_errno("getcwd");
4229 		error = got_worktree_open(&worktree, cwd);
4230 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4231 			goto done;
4232 		if (worktree)
4233 			repo_path =
4234 			    strdup(got_worktree_get_repo_path(worktree));
4235 		else
4236 			repo_path = strdup(cwd);
4237 		if (repo_path == NULL) {
4238 			error = got_error_from_errno("strdup");
4239 			goto done;
4240 		}
4241 	}
4242 
4243 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4244 	if (error)
4245 		goto done;
4246 
4247 	init_curses();
4248 
4249 	error = apply_unveil(got_repo_get_path(repo), NULL);
4250 	if (error)
4251 		goto done;
4252 
4253 	error = tog_load_refs(repo, 0);
4254 	if (error)
4255 		goto done;
4256 
4257 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4258 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4259 	if (error)
4260 		goto done;
4261 
4262 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4263 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4264 	if (error)
4265 		goto done;
4266 
4267 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4268 	if (view == NULL) {
4269 		error = got_error_from_errno("view_open");
4270 		goto done;
4271 	}
4272 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4273 	    ignore_whitespace, force_text_diff, NULL,  repo);
4274 	if (error)
4275 		goto done;
4276 	error = view_loop(view);
4277 done:
4278 	free(label1);
4279 	free(label2);
4280 	free(repo_path);
4281 	free(cwd);
4282 	if (repo) {
4283 		const struct got_error *close_err = got_repo_close(repo);
4284 		if (error == NULL)
4285 			error = close_err;
4286 	}
4287 	if (worktree)
4288 		got_worktree_close(worktree);
4289 	if (pack_fds) {
4290 		const struct got_error *pack_err =
4291 		    got_repo_pack_fds_close(pack_fds);
4292 		if (error == NULL)
4293 			error = pack_err;
4294 	}
4295 	tog_free_refs();
4296 	return error;
4297 }
4298 
4299 __dead static void
4300 usage_blame(void)
4301 {
4302 	endwin();
4303 	fprintf(stderr,
4304 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4305 	    getprogname());
4306 	exit(1);
4307 }
4308 
4309 struct tog_blame_line {
4310 	int annotated;
4311 	struct got_object_id *id;
4312 };
4313 
4314 static const struct got_error *
4315 draw_blame(struct tog_view *view)
4316 {
4317 	struct tog_blame_view_state *s = &view->state.blame;
4318 	struct tog_blame *blame = &s->blame;
4319 	regmatch_t *regmatch = &view->regmatch;
4320 	const struct got_error *err;
4321 	int lineno = 0, nprinted = 0;
4322 	char *line = NULL;
4323 	size_t linesize = 0;
4324 	ssize_t linelen;
4325 	wchar_t *wline;
4326 	int width;
4327 	struct tog_blame_line *blame_line;
4328 	struct got_object_id *prev_id = NULL;
4329 	char *id_str;
4330 	struct tog_color *tc;
4331 
4332 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4333 	if (err)
4334 		return err;
4335 
4336 	rewind(blame->f);
4337 	werase(view->window);
4338 
4339 	if (asprintf(&line, "commit %s", id_str) == -1) {
4340 		err = got_error_from_errno("asprintf");
4341 		free(id_str);
4342 		return err;
4343 	}
4344 
4345 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4346 	free(line);
4347 	line = NULL;
4348 	if (err)
4349 		return err;
4350 	if (view_needs_focus_indication(view))
4351 		wstandout(view->window);
4352 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4353 	if (tc)
4354 		wattr_on(view->window,
4355 		    COLOR_PAIR(tc->colorpair), NULL);
4356 	waddwstr(view->window, wline);
4357 	if (tc)
4358 		wattr_off(view->window,
4359 		    COLOR_PAIR(tc->colorpair), NULL);
4360 	if (view_needs_focus_indication(view))
4361 		wstandend(view->window);
4362 	free(wline);
4363 	wline = NULL;
4364 	if (width < view->ncols - 1)
4365 		waddch(view->window, '\n');
4366 
4367 	if (asprintf(&line, "[%d/%d] %s%s",
4368 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4369 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4370 		free(id_str);
4371 		return got_error_from_errno("asprintf");
4372 	}
4373 	free(id_str);
4374 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4375 	free(line);
4376 	line = NULL;
4377 	if (err)
4378 		return err;
4379 	waddwstr(view->window, wline);
4380 	free(wline);
4381 	wline = NULL;
4382 	if (width < view->ncols - 1)
4383 		waddch(view->window, '\n');
4384 
4385 	s->eof = 0;
4386 	view->maxx = 0;
4387 	while (nprinted < view->nlines - 2) {
4388 		linelen = getline(&line, &linesize, blame->f);
4389 		if (linelen == -1) {
4390 			if (feof(blame->f)) {
4391 				s->eof = 1;
4392 				break;
4393 			}
4394 			free(line);
4395 			return got_ferror(blame->f, GOT_ERR_IO);
4396 		}
4397 		if (++lineno < s->first_displayed_line)
4398 			continue;
4399 
4400 		/* Set view->maxx based on full line length. */
4401 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4402 		if (err) {
4403 			free(line);
4404 			return err;
4405 		}
4406 		free(wline);
4407 		wline = NULL;
4408 		view->maxx = MAX(view->maxx, width);
4409 
4410 		if (view->focussed && nprinted == s->selected_line - 1)
4411 			wstandout(view->window);
4412 
4413 		if (blame->nlines > 0) {
4414 			blame_line = &blame->lines[lineno - 1];
4415 			if (blame_line->annotated && prev_id &&
4416 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4417 			    !(view->focussed &&
4418 			    nprinted == s->selected_line - 1)) {
4419 				waddstr(view->window, "        ");
4420 			} else if (blame_line->annotated) {
4421 				char *id_str;
4422 				err = got_object_id_str(&id_str,
4423 				    blame_line->id);
4424 				if (err) {
4425 					free(line);
4426 					return err;
4427 				}
4428 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4429 				if (tc)
4430 					wattr_on(view->window,
4431 					    COLOR_PAIR(tc->colorpair), NULL);
4432 				wprintw(view->window, "%.8s", id_str);
4433 				if (tc)
4434 					wattr_off(view->window,
4435 					    COLOR_PAIR(tc->colorpair), NULL);
4436 				free(id_str);
4437 				prev_id = blame_line->id;
4438 			} else {
4439 				waddstr(view->window, "........");
4440 				prev_id = NULL;
4441 			}
4442 		} else {
4443 			waddstr(view->window, "........");
4444 			prev_id = NULL;
4445 		}
4446 
4447 		if (view->focussed && nprinted == s->selected_line - 1)
4448 			wstandend(view->window);
4449 		waddstr(view->window, " ");
4450 
4451 		if (view->ncols <= 9) {
4452 			width = 9;
4453 		} else if (s->first_displayed_line + nprinted ==
4454 		    s->matched_line &&
4455 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4456 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4457 			    view->window, view->x, regmatch);
4458 			if (err) {
4459 				free(line);
4460 				return err;
4461 			}
4462 			width += 9;
4463 		} else {
4464 			int skip;
4465 			err = format_line(&wline, &width, &skip, line,
4466 			    view->x, view->ncols - 9, 9, 1);
4467 			if (err) {
4468 				free(line);
4469 				return err;
4470 			}
4471 			waddwstr(view->window, &wline[skip]);
4472 			width += 9;
4473 			free(wline);
4474 			wline = NULL;
4475 		}
4476 
4477 		if (width <= view->ncols - 1)
4478 			waddch(view->window, '\n');
4479 		if (++nprinted == 1)
4480 			s->first_displayed_line = lineno;
4481 	}
4482 	free(line);
4483 	s->last_displayed_line = lineno;
4484 
4485 	view_vborder(view);
4486 
4487 	return NULL;
4488 }
4489 
4490 static const struct got_error *
4491 blame_cb(void *arg, int nlines, int lineno,
4492     struct got_commit_object *commit, struct got_object_id *id)
4493 {
4494 	const struct got_error *err = NULL;
4495 	struct tog_blame_cb_args *a = arg;
4496 	struct tog_blame_line *line;
4497 	int errcode;
4498 
4499 	if (nlines != a->nlines ||
4500 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4501 		return got_error(GOT_ERR_RANGE);
4502 
4503 	errcode = pthread_mutex_lock(&tog_mutex);
4504 	if (errcode)
4505 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4506 
4507 	if (*a->quit) {	/* user has quit the blame view */
4508 		err = got_error(GOT_ERR_ITER_COMPLETED);
4509 		goto done;
4510 	}
4511 
4512 	if (lineno == -1)
4513 		goto done; /* no change in this commit */
4514 
4515 	line = &a->lines[lineno - 1];
4516 	if (line->annotated)
4517 		goto done;
4518 
4519 	line->id = got_object_id_dup(id);
4520 	if (line->id == NULL) {
4521 		err = got_error_from_errno("got_object_id_dup");
4522 		goto done;
4523 	}
4524 	line->annotated = 1;
4525 done:
4526 	errcode = pthread_mutex_unlock(&tog_mutex);
4527 	if (errcode)
4528 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4529 	return err;
4530 }
4531 
4532 static void *
4533 blame_thread(void *arg)
4534 {
4535 	const struct got_error *err, *close_err;
4536 	struct tog_blame_thread_args *ta = arg;
4537 	struct tog_blame_cb_args *a = ta->cb_args;
4538 	int errcode;
4539 
4540 	err = block_signals_used_by_main_thread();
4541 	if (err)
4542 		return (void *)err;
4543 
4544 	err = got_blame(ta->path, a->commit_id, ta->repo,
4545 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4546 	if (err && err->code == GOT_ERR_CANCELLED)
4547 		err = NULL;
4548 
4549 	errcode = pthread_mutex_lock(&tog_mutex);
4550 	if (errcode)
4551 		return (void *)got_error_set_errno(errcode,
4552 		    "pthread_mutex_lock");
4553 
4554 	close_err = got_repo_close(ta->repo);
4555 	if (err == NULL)
4556 		err = close_err;
4557 	ta->repo = NULL;
4558 	*ta->complete = 1;
4559 
4560 	errcode = pthread_mutex_unlock(&tog_mutex);
4561 	if (errcode && err == NULL)
4562 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4563 
4564 	return (void *)err;
4565 }
4566 
4567 static struct got_object_id *
4568 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4569     int first_displayed_line, int selected_line)
4570 {
4571 	struct tog_blame_line *line;
4572 
4573 	if (nlines <= 0)
4574 		return NULL;
4575 
4576 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4577 	if (!line->annotated)
4578 		return NULL;
4579 
4580 	return line->id;
4581 }
4582 
4583 static const struct got_error *
4584 stop_blame(struct tog_blame *blame)
4585 {
4586 	const struct got_error *err = NULL;
4587 	int i;
4588 
4589 	if (blame->thread) {
4590 		int errcode;
4591 		errcode = pthread_mutex_unlock(&tog_mutex);
4592 		if (errcode)
4593 			return got_error_set_errno(errcode,
4594 			    "pthread_mutex_unlock");
4595 		errcode = pthread_join(blame->thread, (void **)&err);
4596 		if (errcode)
4597 			return got_error_set_errno(errcode, "pthread_join");
4598 		errcode = pthread_mutex_lock(&tog_mutex);
4599 		if (errcode)
4600 			return got_error_set_errno(errcode,
4601 			    "pthread_mutex_lock");
4602 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4603 			err = NULL;
4604 		blame->thread = 0; //NULL;
4605 	}
4606 	if (blame->thread_args.repo) {
4607 		const struct got_error *close_err;
4608 		close_err = got_repo_close(blame->thread_args.repo);
4609 		if (err == NULL)
4610 			err = close_err;
4611 		blame->thread_args.repo = NULL;
4612 	}
4613 	if (blame->f) {
4614 		if (fclose(blame->f) == EOF && err == NULL)
4615 			err = got_error_from_errno("fclose");
4616 		blame->f = NULL;
4617 	}
4618 	if (blame->lines) {
4619 		for (i = 0; i < blame->nlines; i++)
4620 			free(blame->lines[i].id);
4621 		free(blame->lines);
4622 		blame->lines = NULL;
4623 	}
4624 	free(blame->cb_args.commit_id);
4625 	blame->cb_args.commit_id = NULL;
4626 	if (blame->pack_fds) {
4627 		const struct got_error *pack_err =
4628 		    got_repo_pack_fds_close(blame->pack_fds);
4629 		if (err == NULL)
4630 			err = pack_err;
4631 		blame->pack_fds = NULL;
4632 	}
4633 	return err;
4634 }
4635 
4636 static const struct got_error *
4637 cancel_blame_view(void *arg)
4638 {
4639 	const struct got_error *err = NULL;
4640 	int *done = arg;
4641 	int errcode;
4642 
4643 	errcode = pthread_mutex_lock(&tog_mutex);
4644 	if (errcode)
4645 		return got_error_set_errno(errcode,
4646 		    "pthread_mutex_unlock");
4647 
4648 	if (*done)
4649 		err = got_error(GOT_ERR_CANCELLED);
4650 
4651 	errcode = pthread_mutex_unlock(&tog_mutex);
4652 	if (errcode)
4653 		return got_error_set_errno(errcode,
4654 		    "pthread_mutex_lock");
4655 
4656 	return err;
4657 }
4658 
4659 static const struct got_error *
4660 run_blame(struct tog_view *view)
4661 {
4662 	struct tog_blame_view_state *s = &view->state.blame;
4663 	struct tog_blame *blame = &s->blame;
4664 	const struct got_error *err = NULL;
4665 	struct got_commit_object *commit = NULL;
4666 	struct got_blob_object *blob = NULL;
4667 	struct got_repository *thread_repo = NULL;
4668 	struct got_object_id *obj_id = NULL;
4669 	int obj_type;
4670 	int *pack_fds = NULL;
4671 
4672 	err = got_object_open_as_commit(&commit, s->repo,
4673 	    &s->blamed_commit->id);
4674 	if (err)
4675 		return err;
4676 
4677 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4678 	if (err)
4679 		goto done;
4680 
4681 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4682 	if (err)
4683 		goto done;
4684 
4685 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4686 		err = got_error(GOT_ERR_OBJ_TYPE);
4687 		goto done;
4688 	}
4689 
4690 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4691 	if (err)
4692 		goto done;
4693 	blame->f = got_opentemp();
4694 	if (blame->f == NULL) {
4695 		err = got_error_from_errno("got_opentemp");
4696 		goto done;
4697 	}
4698 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4699 	    &blame->line_offsets, blame->f, blob);
4700 	if (err)
4701 		goto done;
4702 	if (blame->nlines == 0) {
4703 		s->blame_complete = 1;
4704 		goto done;
4705 	}
4706 
4707 	/* Don't include \n at EOF in the blame line count. */
4708 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4709 		blame->nlines--;
4710 
4711 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4712 	if (blame->lines == NULL) {
4713 		err = got_error_from_errno("calloc");
4714 		goto done;
4715 	}
4716 
4717 	err = got_repo_pack_fds_open(&pack_fds);
4718 	if (err)
4719 		goto done;
4720 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4721 	    pack_fds);
4722 	if (err)
4723 		goto done;
4724 
4725 	blame->pack_fds = pack_fds;
4726 	blame->cb_args.view = view;
4727 	blame->cb_args.lines = blame->lines;
4728 	blame->cb_args.nlines = blame->nlines;
4729 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4730 	if (blame->cb_args.commit_id == NULL) {
4731 		err = got_error_from_errno("got_object_id_dup");
4732 		goto done;
4733 	}
4734 	blame->cb_args.quit = &s->done;
4735 
4736 	blame->thread_args.path = s->path;
4737 	blame->thread_args.repo = thread_repo;
4738 	blame->thread_args.cb_args = &blame->cb_args;
4739 	blame->thread_args.complete = &s->blame_complete;
4740 	blame->thread_args.cancel_cb = cancel_blame_view;
4741 	blame->thread_args.cancel_arg = &s->done;
4742 	s->blame_complete = 0;
4743 
4744 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4745 		s->first_displayed_line = 1;
4746 		s->last_displayed_line = view->nlines;
4747 		s->selected_line = 1;
4748 	}
4749 	s->matched_line = 0;
4750 
4751 done:
4752 	if (commit)
4753 		got_object_commit_close(commit);
4754 	if (blob)
4755 		got_object_blob_close(blob);
4756 	free(obj_id);
4757 	if (err)
4758 		stop_blame(blame);
4759 	return err;
4760 }
4761 
4762 static const struct got_error *
4763 open_blame_view(struct tog_view *view, char *path,
4764     struct got_object_id *commit_id, struct got_repository *repo)
4765 {
4766 	const struct got_error *err = NULL;
4767 	struct tog_blame_view_state *s = &view->state.blame;
4768 
4769 	STAILQ_INIT(&s->blamed_commits);
4770 
4771 	s->path = strdup(path);
4772 	if (s->path == NULL)
4773 		return got_error_from_errno("strdup");
4774 
4775 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4776 	if (err) {
4777 		free(s->path);
4778 		return err;
4779 	}
4780 
4781 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4782 	s->first_displayed_line = 1;
4783 	s->last_displayed_line = view->nlines;
4784 	s->selected_line = 1;
4785 	s->blame_complete = 0;
4786 	s->repo = repo;
4787 	s->commit_id = commit_id;
4788 	memset(&s->blame, 0, sizeof(s->blame));
4789 
4790 	STAILQ_INIT(&s->colors);
4791 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4792 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4793 		    get_color_value("TOG_COLOR_COMMIT"));
4794 		if (err)
4795 			return err;
4796 	}
4797 
4798 	view->show = show_blame_view;
4799 	view->input = input_blame_view;
4800 	view->close = close_blame_view;
4801 	view->search_start = search_start_blame_view;
4802 	view->search_next = search_next_blame_view;
4803 
4804 	return run_blame(view);
4805 }
4806 
4807 static const struct got_error *
4808 close_blame_view(struct tog_view *view)
4809 {
4810 	const struct got_error *err = NULL;
4811 	struct tog_blame_view_state *s = &view->state.blame;
4812 
4813 	if (s->blame.thread)
4814 		err = stop_blame(&s->blame);
4815 
4816 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4817 		struct got_object_qid *blamed_commit;
4818 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4819 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4820 		got_object_qid_free(blamed_commit);
4821 	}
4822 
4823 	free(s->path);
4824 	free_colors(&s->colors);
4825 	return err;
4826 }
4827 
4828 static const struct got_error *
4829 search_start_blame_view(struct tog_view *view)
4830 {
4831 	struct tog_blame_view_state *s = &view->state.blame;
4832 
4833 	s->matched_line = 0;
4834 	return NULL;
4835 }
4836 
4837 static const struct got_error *
4838 search_next_blame_view(struct tog_view *view)
4839 {
4840 	struct tog_blame_view_state *s = &view->state.blame;
4841 	const struct got_error *err = NULL;
4842 	int lineno;
4843 	char *line = NULL;
4844 	size_t linesize = 0;
4845 	ssize_t linelen;
4846 
4847 	if (!view->searching) {
4848 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4849 		return NULL;
4850 	}
4851 
4852 	if (s->matched_line) {
4853 		if (view->searching == TOG_SEARCH_FORWARD)
4854 			lineno = s->matched_line + 1;
4855 		else
4856 			lineno = s->matched_line - 1;
4857 	} else
4858 		lineno = s->first_displayed_line - 1 + s->selected_line;
4859 
4860 	while (1) {
4861 		off_t offset;
4862 
4863 		if (lineno <= 0 || lineno > s->blame.nlines) {
4864 			if (s->matched_line == 0) {
4865 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4866 				break;
4867 			}
4868 
4869 			if (view->searching == TOG_SEARCH_FORWARD)
4870 				lineno = 1;
4871 			else
4872 				lineno = s->blame.nlines;
4873 		}
4874 
4875 		offset = s->blame.line_offsets[lineno - 1];
4876 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4877 			free(line);
4878 			return got_error_from_errno("fseeko");
4879 		}
4880 		linelen = getline(&line, &linesize, s->blame.f);
4881 		if (linelen != -1) {
4882 			char *exstr;
4883 			err = expand_tab(&exstr, line);
4884 			if (err)
4885 				break;
4886 			if (match_line(exstr, &view->regex, 1,
4887 			    &view->regmatch)) {
4888 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4889 				s->matched_line = lineno;
4890 				free(exstr);
4891 				break;
4892 			}
4893 			free(exstr);
4894 		}
4895 		if (view->searching == TOG_SEARCH_FORWARD)
4896 			lineno++;
4897 		else
4898 			lineno--;
4899 	}
4900 	free(line);
4901 
4902 	if (s->matched_line) {
4903 		s->first_displayed_line = s->matched_line;
4904 		s->selected_line = 1;
4905 	}
4906 
4907 	return err;
4908 }
4909 
4910 static const struct got_error *
4911 show_blame_view(struct tog_view *view)
4912 {
4913 	const struct got_error *err = NULL;
4914 	struct tog_blame_view_state *s = &view->state.blame;
4915 	int errcode;
4916 
4917 	if (s->blame.thread == 0 && !s->blame_complete) {
4918 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4919 		    &s->blame.thread_args);
4920 		if (errcode)
4921 			return got_error_set_errno(errcode, "pthread_create");
4922 
4923 		halfdelay(1); /* fast refresh while annotating  */
4924 	}
4925 
4926 	if (s->blame_complete)
4927 		halfdelay(10); /* disable fast refresh */
4928 
4929 	err = draw_blame(view);
4930 
4931 	view_vborder(view);
4932 	return err;
4933 }
4934 
4935 static const struct got_error *
4936 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4937 {
4938 	const struct got_error *err = NULL, *thread_err = NULL;
4939 	struct tog_view *diff_view;
4940 	struct tog_blame_view_state *s = &view->state.blame;
4941 	int begin_x = 0, nscroll = view->nlines - 2;
4942 
4943 	switch (ch) {
4944 	case '0':
4945 		view->x = 0;
4946 		break;
4947 	case '$':
4948 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4949 		break;
4950 	case KEY_RIGHT:
4951 	case 'l':
4952 		if (view->x + view->ncols / 3 < view->maxx)
4953 			view->x += 2;  /* move two columns right */
4954 		break;
4955 	case KEY_LEFT:
4956 	case 'h':
4957 		view->x -= MIN(view->x, 2);  /* move two columns back */
4958 		break;
4959 	case 'q':
4960 		s->done = 1;
4961 		break;
4962 	case 'g':
4963 	case KEY_HOME:
4964 		s->selected_line = 1;
4965 		s->first_displayed_line = 1;
4966 		break;
4967 	case 'G':
4968 	case KEY_END:
4969 		if (s->blame.nlines < view->nlines - 2) {
4970 			s->selected_line = s->blame.nlines;
4971 			s->first_displayed_line = 1;
4972 		} else {
4973 			s->selected_line = view->nlines - 2;
4974 			s->first_displayed_line = s->blame.nlines -
4975 			    (view->nlines - 3);
4976 		}
4977 		break;
4978 	case 'k':
4979 	case KEY_UP:
4980 	case CTRL('p'):
4981 		if (s->selected_line > 1)
4982 			s->selected_line--;
4983 		else if (s->selected_line == 1 &&
4984 		    s->first_displayed_line > 1)
4985 			s->first_displayed_line--;
4986 		break;
4987 	case CTRL('u'):
4988 	case 'u':
4989 		nscroll /= 2;
4990 		/* FALL THROUGH */
4991 	case KEY_PPAGE:
4992 	case CTRL('b'):
4993 		if (s->first_displayed_line == 1) {
4994 			s->selected_line = MAX(1, s->selected_line - nscroll);
4995 			break;
4996 		}
4997 		if (s->first_displayed_line > nscroll)
4998 			s->first_displayed_line -= nscroll;
4999 		else
5000 			s->first_displayed_line = 1;
5001 		break;
5002 	case 'j':
5003 	case KEY_DOWN:
5004 	case CTRL('n'):
5005 		if (s->selected_line < view->nlines - 2 &&
5006 		    s->first_displayed_line +
5007 		    s->selected_line <= s->blame.nlines)
5008 			s->selected_line++;
5009 		else if (s->last_displayed_line <
5010 		    s->blame.nlines)
5011 			s->first_displayed_line++;
5012 		break;
5013 	case 'b':
5014 	case 'p': {
5015 		struct got_object_id *id = NULL;
5016 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5017 		    s->first_displayed_line, s->selected_line);
5018 		if (id == NULL)
5019 			break;
5020 		if (ch == 'p') {
5021 			struct got_commit_object *commit, *pcommit;
5022 			struct got_object_qid *pid;
5023 			struct got_object_id *blob_id = NULL;
5024 			int obj_type;
5025 			err = got_object_open_as_commit(&commit,
5026 			    s->repo, id);
5027 			if (err)
5028 				break;
5029 			pid = STAILQ_FIRST(
5030 			    got_object_commit_get_parent_ids(commit));
5031 			if (pid == NULL) {
5032 				got_object_commit_close(commit);
5033 				break;
5034 			}
5035 			/* Check if path history ends here. */
5036 			err = got_object_open_as_commit(&pcommit,
5037 			    s->repo, &pid->id);
5038 			if (err)
5039 				break;
5040 			err = got_object_id_by_path(&blob_id, s->repo,
5041 			    pcommit, s->path);
5042 			got_object_commit_close(pcommit);
5043 			if (err) {
5044 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5045 					err = NULL;
5046 				got_object_commit_close(commit);
5047 				break;
5048 			}
5049 			err = got_object_get_type(&obj_type, s->repo,
5050 			    blob_id);
5051 			free(blob_id);
5052 			/* Can't blame non-blob type objects. */
5053 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5054 				got_object_commit_close(commit);
5055 				break;
5056 			}
5057 			err = got_object_qid_alloc(&s->blamed_commit,
5058 			    &pid->id);
5059 			got_object_commit_close(commit);
5060 		} else {
5061 			if (got_object_id_cmp(id,
5062 			    &s->blamed_commit->id) == 0)
5063 				break;
5064 			err = got_object_qid_alloc(&s->blamed_commit,
5065 			    id);
5066 		}
5067 		if (err)
5068 			break;
5069 		s->done = 1;
5070 		thread_err = stop_blame(&s->blame);
5071 		s->done = 0;
5072 		if (thread_err)
5073 			break;
5074 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5075 		    s->blamed_commit, entry);
5076 		err = run_blame(view);
5077 		if (err)
5078 			break;
5079 		break;
5080 	}
5081 	case 'B': {
5082 		struct got_object_qid *first;
5083 		first = STAILQ_FIRST(&s->blamed_commits);
5084 		if (!got_object_id_cmp(&first->id, s->commit_id))
5085 			break;
5086 		s->done = 1;
5087 		thread_err = stop_blame(&s->blame);
5088 		s->done = 0;
5089 		if (thread_err)
5090 			break;
5091 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5092 		got_object_qid_free(s->blamed_commit);
5093 		s->blamed_commit =
5094 		    STAILQ_FIRST(&s->blamed_commits);
5095 		err = run_blame(view);
5096 		if (err)
5097 			break;
5098 		break;
5099 	}
5100 	case KEY_ENTER:
5101 	case '\r': {
5102 		struct got_object_id *id = NULL;
5103 		struct got_object_qid *pid;
5104 		struct got_commit_object *commit = NULL;
5105 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5106 		    s->first_displayed_line, s->selected_line);
5107 		if (id == NULL)
5108 			break;
5109 		err = got_object_open_as_commit(&commit, s->repo, id);
5110 		if (err)
5111 			break;
5112 		pid = STAILQ_FIRST(
5113 		    got_object_commit_get_parent_ids(commit));
5114 		if (view_is_parent_view(view))
5115 		    begin_x = view_split_begin_x(view->begin_x);
5116 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5117 		if (diff_view == NULL) {
5118 			got_object_commit_close(commit);
5119 			err = got_error_from_errno("view_open");
5120 			break;
5121 		}
5122 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5123 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5124 		got_object_commit_close(commit);
5125 		if (err) {
5126 			view_close(diff_view);
5127 			break;
5128 		}
5129 		view->focussed = 0;
5130 		diff_view->focussed = 1;
5131 		if (view_is_parent_view(view)) {
5132 			err = view_close_child(view);
5133 			if (err)
5134 				break;
5135 			err = view_set_child(view, diff_view);
5136 			if (err)
5137 				break;
5138 			view->focus_child = 1;
5139 		} else
5140 			*new_view = diff_view;
5141 		if (err)
5142 			break;
5143 		break;
5144 	}
5145 	case CTRL('d'):
5146 	case 'd':
5147 		nscroll /= 2;
5148 		/* FALL THROUGH */
5149 	case KEY_NPAGE:
5150 	case CTRL('f'):
5151 	case ' ':
5152 		if (s->last_displayed_line >= s->blame.nlines &&
5153 		    s->selected_line >= MIN(s->blame.nlines,
5154 		    view->nlines - 2)) {
5155 			break;
5156 		}
5157 		if (s->last_displayed_line >= s->blame.nlines &&
5158 		    s->selected_line < view->nlines - 2) {
5159 			s->selected_line +=
5160 			    MIN(nscroll, s->last_displayed_line -
5161 			    s->first_displayed_line - s->selected_line + 1);
5162 		}
5163 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5164 			s->first_displayed_line += nscroll;
5165 		else
5166 			s->first_displayed_line =
5167 			    s->blame.nlines - (view->nlines - 3);
5168 		break;
5169 	case KEY_RESIZE:
5170 		if (s->selected_line > view->nlines - 2) {
5171 			s->selected_line = MIN(s->blame.nlines,
5172 			    view->nlines - 2);
5173 		}
5174 		break;
5175 	default:
5176 		break;
5177 	}
5178 	return thread_err ? thread_err : err;
5179 }
5180 
5181 static const struct got_error *
5182 cmd_blame(int argc, char *argv[])
5183 {
5184 	const struct got_error *error;
5185 	struct got_repository *repo = NULL;
5186 	struct got_worktree *worktree = NULL;
5187 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5188 	char *link_target = NULL;
5189 	struct got_object_id *commit_id = NULL;
5190 	struct got_commit_object *commit = NULL;
5191 	char *commit_id_str = NULL;
5192 	int ch;
5193 	struct tog_view *view;
5194 	int *pack_fds = NULL;
5195 
5196 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5197 		switch (ch) {
5198 		case 'c':
5199 			commit_id_str = optarg;
5200 			break;
5201 		case 'r':
5202 			repo_path = realpath(optarg, NULL);
5203 			if (repo_path == NULL)
5204 				return got_error_from_errno2("realpath",
5205 				    optarg);
5206 			break;
5207 		default:
5208 			usage_blame();
5209 			/* NOTREACHED */
5210 		}
5211 	}
5212 
5213 	argc -= optind;
5214 	argv += optind;
5215 
5216 	if (argc != 1)
5217 		usage_blame();
5218 
5219 	error = got_repo_pack_fds_open(&pack_fds);
5220 	if (error != NULL)
5221 		goto done;
5222 
5223 	if (repo_path == NULL) {
5224 		cwd = getcwd(NULL, 0);
5225 		if (cwd == NULL)
5226 			return got_error_from_errno("getcwd");
5227 		error = got_worktree_open(&worktree, cwd);
5228 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5229 			goto done;
5230 		if (worktree)
5231 			repo_path =
5232 			    strdup(got_worktree_get_repo_path(worktree));
5233 		else
5234 			repo_path = strdup(cwd);
5235 		if (repo_path == NULL) {
5236 			error = got_error_from_errno("strdup");
5237 			goto done;
5238 		}
5239 	}
5240 
5241 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5242 	if (error != NULL)
5243 		goto done;
5244 
5245 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5246 	    worktree);
5247 	if (error)
5248 		goto done;
5249 
5250 	init_curses();
5251 
5252 	error = apply_unveil(got_repo_get_path(repo), NULL);
5253 	if (error)
5254 		goto done;
5255 
5256 	error = tog_load_refs(repo, 0);
5257 	if (error)
5258 		goto done;
5259 
5260 	if (commit_id_str == NULL) {
5261 		struct got_reference *head_ref;
5262 		error = got_ref_open(&head_ref, repo, worktree ?
5263 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5264 		if (error != NULL)
5265 			goto done;
5266 		error = got_ref_resolve(&commit_id, repo, head_ref);
5267 		got_ref_close(head_ref);
5268 	} else {
5269 		error = got_repo_match_object_id(&commit_id, NULL,
5270 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5271 	}
5272 	if (error != NULL)
5273 		goto done;
5274 
5275 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5276 	if (view == NULL) {
5277 		error = got_error_from_errno("view_open");
5278 		goto done;
5279 	}
5280 
5281 	error = got_object_open_as_commit(&commit, repo, commit_id);
5282 	if (error)
5283 		goto done;
5284 
5285 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5286 	    commit, repo);
5287 	if (error)
5288 		goto done;
5289 
5290 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5291 	    commit_id, repo);
5292 	if (error)
5293 		goto done;
5294 	if (worktree) {
5295 		/* Release work tree lock. */
5296 		got_worktree_close(worktree);
5297 		worktree = NULL;
5298 	}
5299 	error = view_loop(view);
5300 done:
5301 	free(repo_path);
5302 	free(in_repo_path);
5303 	free(link_target);
5304 	free(cwd);
5305 	free(commit_id);
5306 	if (commit)
5307 		got_object_commit_close(commit);
5308 	if (worktree)
5309 		got_worktree_close(worktree);
5310 	if (repo) {
5311 		const struct got_error *close_err = got_repo_close(repo);
5312 		if (error == NULL)
5313 			error = close_err;
5314 	}
5315 	if (pack_fds) {
5316 		const struct got_error *pack_err =
5317 		    got_repo_pack_fds_close(pack_fds);
5318 		if (error == NULL)
5319 			error = pack_err;
5320 	}
5321 	tog_free_refs();
5322 	return error;
5323 }
5324 
5325 static const struct got_error *
5326 draw_tree_entries(struct tog_view *view, const char *parent_path)
5327 {
5328 	struct tog_tree_view_state *s = &view->state.tree;
5329 	const struct got_error *err = NULL;
5330 	struct got_tree_entry *te;
5331 	wchar_t *wline;
5332 	struct tog_color *tc;
5333 	int width, n, i, nentries;
5334 	int limit = view->nlines;
5335 
5336 	s->ndisplayed = 0;
5337 
5338 	werase(view->window);
5339 
5340 	if (limit == 0)
5341 		return NULL;
5342 
5343 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5344 	    0, 0);
5345 	if (err)
5346 		return err;
5347 	if (view_needs_focus_indication(view))
5348 		wstandout(view->window);
5349 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5350 	if (tc)
5351 		wattr_on(view->window,
5352 		    COLOR_PAIR(tc->colorpair), NULL);
5353 	waddwstr(view->window, wline);
5354 	if (tc)
5355 		wattr_off(view->window,
5356 		    COLOR_PAIR(tc->colorpair), NULL);
5357 	if (view_needs_focus_indication(view))
5358 		wstandend(view->window);
5359 	free(wline);
5360 	wline = NULL;
5361 	if (width < view->ncols - 1)
5362 		waddch(view->window, '\n');
5363 	if (--limit <= 0)
5364 		return NULL;
5365 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5366 	    0, 0);
5367 	if (err)
5368 		return err;
5369 	waddwstr(view->window, wline);
5370 	free(wline);
5371 	wline = NULL;
5372 	if (width < view->ncols - 1)
5373 		waddch(view->window, '\n');
5374 	if (--limit <= 0)
5375 		return NULL;
5376 	waddch(view->window, '\n');
5377 	if (--limit <= 0)
5378 		return NULL;
5379 
5380 	if (s->first_displayed_entry == NULL) {
5381 		te = got_object_tree_get_first_entry(s->tree);
5382 		if (s->selected == 0) {
5383 			if (view->focussed)
5384 				wstandout(view->window);
5385 			s->selected_entry = NULL;
5386 		}
5387 		waddstr(view->window, "  ..\n");	/* parent directory */
5388 		if (s->selected == 0 && view->focussed)
5389 			wstandend(view->window);
5390 		s->ndisplayed++;
5391 		if (--limit <= 0)
5392 			return NULL;
5393 		n = 1;
5394 	} else {
5395 		n = 0;
5396 		te = s->first_displayed_entry;
5397 	}
5398 
5399 	nentries = got_object_tree_get_nentries(s->tree);
5400 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5401 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5402 		const char *modestr = "";
5403 		mode_t mode;
5404 
5405 		te = got_object_tree_get_entry(s->tree, i);
5406 		mode = got_tree_entry_get_mode(te);
5407 
5408 		if (s->show_ids) {
5409 			err = got_object_id_str(&id_str,
5410 			    got_tree_entry_get_id(te));
5411 			if (err)
5412 				return got_error_from_errno(
5413 				    "got_object_id_str");
5414 		}
5415 		if (got_object_tree_entry_is_submodule(te))
5416 			modestr = "$";
5417 		else if (S_ISLNK(mode)) {
5418 			int i;
5419 
5420 			err = got_tree_entry_get_symlink_target(&link_target,
5421 			    te, s->repo);
5422 			if (err) {
5423 				free(id_str);
5424 				return err;
5425 			}
5426 			for (i = 0; i < strlen(link_target); i++) {
5427 				if (!isprint((unsigned char)link_target[i]))
5428 					link_target[i] = '?';
5429 			}
5430 			modestr = "@";
5431 		}
5432 		else if (S_ISDIR(mode))
5433 			modestr = "/";
5434 		else if (mode & S_IXUSR)
5435 			modestr = "*";
5436 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5437 		    got_tree_entry_get_name(te), modestr,
5438 		    link_target ? " -> ": "",
5439 		    link_target ? link_target : "") == -1) {
5440 			free(id_str);
5441 			free(link_target);
5442 			return got_error_from_errno("asprintf");
5443 		}
5444 		free(id_str);
5445 		free(link_target);
5446 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5447 		    0, 0);
5448 		if (err) {
5449 			free(line);
5450 			break;
5451 		}
5452 		if (n == s->selected) {
5453 			if (view->focussed)
5454 				wstandout(view->window);
5455 			s->selected_entry = te;
5456 		}
5457 		tc = match_color(&s->colors, line);
5458 		if (tc)
5459 			wattr_on(view->window,
5460 			    COLOR_PAIR(tc->colorpair), NULL);
5461 		waddwstr(view->window, wline);
5462 		if (tc)
5463 			wattr_off(view->window,
5464 			    COLOR_PAIR(tc->colorpair), NULL);
5465 		if (width < view->ncols - 1)
5466 			waddch(view->window, '\n');
5467 		if (n == s->selected && view->focussed)
5468 			wstandend(view->window);
5469 		free(line);
5470 		free(wline);
5471 		wline = NULL;
5472 		n++;
5473 		s->ndisplayed++;
5474 		s->last_displayed_entry = te;
5475 		if (--limit <= 0)
5476 			break;
5477 	}
5478 
5479 	return err;
5480 }
5481 
5482 static void
5483 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5484 {
5485 	struct got_tree_entry *te;
5486 	int isroot = s->tree == s->root;
5487 	int i = 0;
5488 
5489 	if (s->first_displayed_entry == NULL)
5490 		return;
5491 
5492 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5493 	while (i++ < maxscroll) {
5494 		if (te == NULL) {
5495 			if (!isroot)
5496 				s->first_displayed_entry = NULL;
5497 			break;
5498 		}
5499 		s->first_displayed_entry = te;
5500 		te = got_tree_entry_get_prev(s->tree, te);
5501 	}
5502 }
5503 
5504 static void
5505 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5506 {
5507 	struct got_tree_entry *next, *last;
5508 	int n = 0;
5509 
5510 	if (s->first_displayed_entry)
5511 		next = got_tree_entry_get_next(s->tree,
5512 		    s->first_displayed_entry);
5513 	else
5514 		next = got_object_tree_get_first_entry(s->tree);
5515 
5516 	last = s->last_displayed_entry;
5517 	while (next && last && n++ < maxscroll) {
5518 		last = got_tree_entry_get_next(s->tree, last);
5519 		if (last) {
5520 			s->first_displayed_entry = next;
5521 			next = got_tree_entry_get_next(s->tree, next);
5522 		}
5523 	}
5524 }
5525 
5526 static const struct got_error *
5527 tree_entry_path(char **path, struct tog_parent_trees *parents,
5528     struct got_tree_entry *te)
5529 {
5530 	const struct got_error *err = NULL;
5531 	struct tog_parent_tree *pt;
5532 	size_t len = 2; /* for leading slash and NUL */
5533 
5534 	TAILQ_FOREACH(pt, parents, entry)
5535 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5536 		    + 1 /* slash */;
5537 	if (te)
5538 		len += strlen(got_tree_entry_get_name(te));
5539 
5540 	*path = calloc(1, len);
5541 	if (path == NULL)
5542 		return got_error_from_errno("calloc");
5543 
5544 	(*path)[0] = '/';
5545 	pt = TAILQ_LAST(parents, tog_parent_trees);
5546 	while (pt) {
5547 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5548 		if (strlcat(*path, name, len) >= len) {
5549 			err = got_error(GOT_ERR_NO_SPACE);
5550 			goto done;
5551 		}
5552 		if (strlcat(*path, "/", len) >= len) {
5553 			err = got_error(GOT_ERR_NO_SPACE);
5554 			goto done;
5555 		}
5556 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5557 	}
5558 	if (te) {
5559 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5560 			err = got_error(GOT_ERR_NO_SPACE);
5561 			goto done;
5562 		}
5563 	}
5564 done:
5565 	if (err) {
5566 		free(*path);
5567 		*path = NULL;
5568 	}
5569 	return err;
5570 }
5571 
5572 static const struct got_error *
5573 blame_tree_entry(struct tog_view **new_view, int begin_x,
5574     struct got_tree_entry *te, struct tog_parent_trees *parents,
5575     struct got_object_id *commit_id, struct got_repository *repo)
5576 {
5577 	const struct got_error *err = NULL;
5578 	char *path;
5579 	struct tog_view *blame_view;
5580 
5581 	*new_view = NULL;
5582 
5583 	err = tree_entry_path(&path, parents, te);
5584 	if (err)
5585 		return err;
5586 
5587 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5588 	if (blame_view == NULL) {
5589 		err = got_error_from_errno("view_open");
5590 		goto done;
5591 	}
5592 
5593 	err = open_blame_view(blame_view, path, commit_id, repo);
5594 	if (err) {
5595 		if (err->code == GOT_ERR_CANCELLED)
5596 			err = NULL;
5597 		view_close(blame_view);
5598 	} else
5599 		*new_view = blame_view;
5600 done:
5601 	free(path);
5602 	return err;
5603 }
5604 
5605 static const struct got_error *
5606 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5607     struct tog_tree_view_state *s)
5608 {
5609 	struct tog_view *log_view;
5610 	const struct got_error *err = NULL;
5611 	char *path;
5612 
5613 	*new_view = NULL;
5614 
5615 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5616 	if (log_view == NULL)
5617 		return got_error_from_errno("view_open");
5618 
5619 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5620 	if (err)
5621 		return err;
5622 
5623 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5624 	    path, 0);
5625 	if (err)
5626 		view_close(log_view);
5627 	else
5628 		*new_view = log_view;
5629 	free(path);
5630 	return err;
5631 }
5632 
5633 static const struct got_error *
5634 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5635     const char *head_ref_name, struct got_repository *repo)
5636 {
5637 	const struct got_error *err = NULL;
5638 	char *commit_id_str = NULL;
5639 	struct tog_tree_view_state *s = &view->state.tree;
5640 	struct got_commit_object *commit = NULL;
5641 
5642 	TAILQ_INIT(&s->parents);
5643 	STAILQ_INIT(&s->colors);
5644 
5645 	s->commit_id = got_object_id_dup(commit_id);
5646 	if (s->commit_id == NULL)
5647 		return got_error_from_errno("got_object_id_dup");
5648 
5649 	err = got_object_open_as_commit(&commit, repo, commit_id);
5650 	if (err)
5651 		goto done;
5652 
5653 	/*
5654 	 * The root is opened here and will be closed when the view is closed.
5655 	 * Any visited subtrees and their path-wise parents are opened and
5656 	 * closed on demand.
5657 	 */
5658 	err = got_object_open_as_tree(&s->root, repo,
5659 	    got_object_commit_get_tree_id(commit));
5660 	if (err)
5661 		goto done;
5662 	s->tree = s->root;
5663 
5664 	err = got_object_id_str(&commit_id_str, commit_id);
5665 	if (err != NULL)
5666 		goto done;
5667 
5668 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5669 		err = got_error_from_errno("asprintf");
5670 		goto done;
5671 	}
5672 
5673 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5674 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5675 	if (head_ref_name) {
5676 		s->head_ref_name = strdup(head_ref_name);
5677 		if (s->head_ref_name == NULL) {
5678 			err = got_error_from_errno("strdup");
5679 			goto done;
5680 		}
5681 	}
5682 	s->repo = repo;
5683 
5684 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5685 		err = add_color(&s->colors, "\\$$",
5686 		    TOG_COLOR_TREE_SUBMODULE,
5687 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5688 		if (err)
5689 			goto done;
5690 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5691 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5692 		if (err)
5693 			goto done;
5694 		err = add_color(&s->colors, "/$",
5695 		    TOG_COLOR_TREE_DIRECTORY,
5696 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5697 		if (err)
5698 			goto done;
5699 
5700 		err = add_color(&s->colors, "\\*$",
5701 		    TOG_COLOR_TREE_EXECUTABLE,
5702 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5703 		if (err)
5704 			goto done;
5705 
5706 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5707 		    get_color_value("TOG_COLOR_COMMIT"));
5708 		if (err)
5709 			goto done;
5710 	}
5711 
5712 	view->show = show_tree_view;
5713 	view->input = input_tree_view;
5714 	view->close = close_tree_view;
5715 	view->search_start = search_start_tree_view;
5716 	view->search_next = search_next_tree_view;
5717 done:
5718 	free(commit_id_str);
5719 	if (commit)
5720 		got_object_commit_close(commit);
5721 	if (err)
5722 		close_tree_view(view);
5723 	return err;
5724 }
5725 
5726 static const struct got_error *
5727 close_tree_view(struct tog_view *view)
5728 {
5729 	struct tog_tree_view_state *s = &view->state.tree;
5730 
5731 	free_colors(&s->colors);
5732 	free(s->tree_label);
5733 	s->tree_label = NULL;
5734 	free(s->commit_id);
5735 	s->commit_id = NULL;
5736 	free(s->head_ref_name);
5737 	s->head_ref_name = NULL;
5738 	while (!TAILQ_EMPTY(&s->parents)) {
5739 		struct tog_parent_tree *parent;
5740 		parent = TAILQ_FIRST(&s->parents);
5741 		TAILQ_REMOVE(&s->parents, parent, entry);
5742 		if (parent->tree != s->root)
5743 			got_object_tree_close(parent->tree);
5744 		free(parent);
5745 
5746 	}
5747 	if (s->tree != NULL && s->tree != s->root)
5748 		got_object_tree_close(s->tree);
5749 	if (s->root)
5750 		got_object_tree_close(s->root);
5751 	return NULL;
5752 }
5753 
5754 static const struct got_error *
5755 search_start_tree_view(struct tog_view *view)
5756 {
5757 	struct tog_tree_view_state *s = &view->state.tree;
5758 
5759 	s->matched_entry = NULL;
5760 	return NULL;
5761 }
5762 
5763 static int
5764 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5765 {
5766 	regmatch_t regmatch;
5767 
5768 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5769 	    0) == 0;
5770 }
5771 
5772 static const struct got_error *
5773 search_next_tree_view(struct tog_view *view)
5774 {
5775 	struct tog_tree_view_state *s = &view->state.tree;
5776 	struct got_tree_entry *te = NULL;
5777 
5778 	if (!view->searching) {
5779 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5780 		return NULL;
5781 	}
5782 
5783 	if (s->matched_entry) {
5784 		if (view->searching == TOG_SEARCH_FORWARD) {
5785 			if (s->selected_entry)
5786 				te = got_tree_entry_get_next(s->tree,
5787 				    s->selected_entry);
5788 			else
5789 				te = got_object_tree_get_first_entry(s->tree);
5790 		} else {
5791 			if (s->selected_entry == NULL)
5792 				te = got_object_tree_get_last_entry(s->tree);
5793 			else
5794 				te = got_tree_entry_get_prev(s->tree,
5795 				    s->selected_entry);
5796 		}
5797 	} else {
5798 		if (s->selected_entry)
5799 			te = s->selected_entry;
5800 		else if (view->searching == TOG_SEARCH_FORWARD)
5801 			te = got_object_tree_get_first_entry(s->tree);
5802 		else
5803 			te = got_object_tree_get_last_entry(s->tree);
5804 	}
5805 
5806 	while (1) {
5807 		if (te == NULL) {
5808 			if (s->matched_entry == NULL) {
5809 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5810 				return NULL;
5811 			}
5812 			if (view->searching == TOG_SEARCH_FORWARD)
5813 				te = got_object_tree_get_first_entry(s->tree);
5814 			else
5815 				te = got_object_tree_get_last_entry(s->tree);
5816 		}
5817 
5818 		if (match_tree_entry(te, &view->regex)) {
5819 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5820 			s->matched_entry = te;
5821 			break;
5822 		}
5823 
5824 		if (view->searching == TOG_SEARCH_FORWARD)
5825 			te = got_tree_entry_get_next(s->tree, te);
5826 		else
5827 			te = got_tree_entry_get_prev(s->tree, te);
5828 	}
5829 
5830 	if (s->matched_entry) {
5831 		s->first_displayed_entry = s->matched_entry;
5832 		s->selected = 0;
5833 	}
5834 
5835 	return NULL;
5836 }
5837 
5838 static const struct got_error *
5839 show_tree_view(struct tog_view *view)
5840 {
5841 	const struct got_error *err = NULL;
5842 	struct tog_tree_view_state *s = &view->state.tree;
5843 	char *parent_path;
5844 
5845 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5846 	if (err)
5847 		return err;
5848 
5849 	err = draw_tree_entries(view, parent_path);
5850 	free(parent_path);
5851 
5852 	view_vborder(view);
5853 	return err;
5854 }
5855 
5856 static const struct got_error *
5857 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5858 {
5859 	const struct got_error *err = NULL;
5860 	struct tog_tree_view_state *s = &view->state.tree;
5861 	struct tog_view *log_view, *ref_view;
5862 	struct got_tree_entry *te;
5863 	int begin_x = 0, n, nscroll = view->nlines - 3;
5864 
5865 	switch (ch) {
5866 	case 'i':
5867 		s->show_ids = !s->show_ids;
5868 		break;
5869 	case 'l':
5870 		if (!s->selected_entry)
5871 			break;
5872 		if (view_is_parent_view(view))
5873 			begin_x = view_split_begin_x(view->begin_x);
5874 		err = log_selected_tree_entry(&log_view, begin_x, s);
5875 		view->focussed = 0;
5876 		log_view->focussed = 1;
5877 		if (view_is_parent_view(view)) {
5878 			err = view_close_child(view);
5879 			if (err)
5880 				return err;
5881 			err = view_set_child(view, log_view);
5882 			if (err)
5883 				return err;
5884 			view->focus_child = 1;
5885 		} else
5886 			*new_view = log_view;
5887 		break;
5888 	case 'r':
5889 		if (view_is_parent_view(view))
5890 			begin_x = view_split_begin_x(view->begin_x);
5891 		ref_view = view_open(view->nlines, view->ncols,
5892 		    view->begin_y, begin_x, TOG_VIEW_REF);
5893 		if (ref_view == NULL)
5894 			return got_error_from_errno("view_open");
5895 		err = open_ref_view(ref_view, s->repo);
5896 		if (err) {
5897 			view_close(ref_view);
5898 			return err;
5899 		}
5900 		view->focussed = 0;
5901 		ref_view->focussed = 1;
5902 		if (view_is_parent_view(view)) {
5903 			err = view_close_child(view);
5904 			if (err)
5905 				return err;
5906 			err = view_set_child(view, ref_view);
5907 			if (err)
5908 				return err;
5909 			view->focus_child = 1;
5910 		} else
5911 			*new_view = ref_view;
5912 		break;
5913 	case 'g':
5914 	case KEY_HOME:
5915 		s->selected = 0;
5916 		if (s->tree == s->root)
5917 			s->first_displayed_entry =
5918 			    got_object_tree_get_first_entry(s->tree);
5919 		else
5920 			s->first_displayed_entry = NULL;
5921 		break;
5922 	case 'G':
5923 	case KEY_END:
5924 		s->selected = 0;
5925 		te = got_object_tree_get_last_entry(s->tree);
5926 		for (n = 0; n < view->nlines - 3; n++) {
5927 			if (te == NULL) {
5928 				if(s->tree != s->root) {
5929 					s->first_displayed_entry = NULL;
5930 					n++;
5931 				}
5932 				break;
5933 			}
5934 			s->first_displayed_entry = te;
5935 			te = got_tree_entry_get_prev(s->tree, te);
5936 		}
5937 		if (n > 0)
5938 			s->selected = n - 1;
5939 		break;
5940 	case 'k':
5941 	case KEY_UP:
5942 	case CTRL('p'):
5943 		if (s->selected > 0) {
5944 			s->selected--;
5945 			break;
5946 		}
5947 		tree_scroll_up(s, 1);
5948 		break;
5949 	case CTRL('u'):
5950 	case 'u':
5951 		nscroll /= 2;
5952 		/* FALL THROUGH */
5953 	case KEY_PPAGE:
5954 	case CTRL('b'):
5955 		if (s->tree == s->root) {
5956 			if (got_object_tree_get_first_entry(s->tree) ==
5957 			    s->first_displayed_entry)
5958 				s->selected -= MIN(s->selected, nscroll);
5959 		} else {
5960 			if (s->first_displayed_entry == NULL)
5961 				s->selected -= MIN(s->selected, nscroll);
5962 		}
5963 		tree_scroll_up(s, MAX(0, nscroll));
5964 		break;
5965 	case 'j':
5966 	case KEY_DOWN:
5967 	case CTRL('n'):
5968 		if (s->selected < s->ndisplayed - 1) {
5969 			s->selected++;
5970 			break;
5971 		}
5972 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5973 		    == NULL)
5974 			/* can't scroll any further */
5975 			break;
5976 		tree_scroll_down(s, 1);
5977 		break;
5978 	case CTRL('d'):
5979 	case 'd':
5980 		nscroll /= 2;
5981 		/* FALL THROUGH */
5982 	case KEY_NPAGE:
5983 	case CTRL('f'):
5984 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5985 		    == NULL) {
5986 			/* can't scroll any further; move cursor down */
5987 			if (s->selected < s->ndisplayed - 1)
5988 				s->selected += MIN(nscroll,
5989 				    s->ndisplayed - s->selected - 1);
5990 			break;
5991 		}
5992 		tree_scroll_down(s, nscroll);
5993 		break;
5994 	case KEY_ENTER:
5995 	case '\r':
5996 	case KEY_BACKSPACE:
5997 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5998 			struct tog_parent_tree *parent;
5999 			/* user selected '..' */
6000 			if (s->tree == s->root)
6001 				break;
6002 			parent = TAILQ_FIRST(&s->parents);
6003 			TAILQ_REMOVE(&s->parents, parent,
6004 			    entry);
6005 			got_object_tree_close(s->tree);
6006 			s->tree = parent->tree;
6007 			s->first_displayed_entry =
6008 			    parent->first_displayed_entry;
6009 			s->selected_entry =
6010 			    parent->selected_entry;
6011 			s->selected = parent->selected;
6012 			free(parent);
6013 		} else if (S_ISDIR(got_tree_entry_get_mode(
6014 		    s->selected_entry))) {
6015 			struct got_tree_object *subtree;
6016 			err = got_object_open_as_tree(&subtree, s->repo,
6017 			    got_tree_entry_get_id(s->selected_entry));
6018 			if (err)
6019 				break;
6020 			err = tree_view_visit_subtree(s, subtree);
6021 			if (err) {
6022 				got_object_tree_close(subtree);
6023 				break;
6024 			}
6025 		} else if (S_ISREG(got_tree_entry_get_mode(
6026 		    s->selected_entry))) {
6027 			struct tog_view *blame_view;
6028 			int begin_x = view_is_parent_view(view) ?
6029 			    view_split_begin_x(view->begin_x) : 0;
6030 
6031 			err = blame_tree_entry(&blame_view, begin_x,
6032 			    s->selected_entry, &s->parents,
6033 			    s->commit_id, s->repo);
6034 			if (err)
6035 				break;
6036 			view->focussed = 0;
6037 			blame_view->focussed = 1;
6038 			if (view_is_parent_view(view)) {
6039 				err = view_close_child(view);
6040 				if (err)
6041 					return err;
6042 				err = view_set_child(view, blame_view);
6043 				if (err)
6044 					return err;
6045 				view->focus_child = 1;
6046 			} else
6047 				*new_view = blame_view;
6048 		}
6049 		break;
6050 	case KEY_RESIZE:
6051 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6052 			s->selected = view->nlines - 4;
6053 		break;
6054 	default:
6055 		break;
6056 	}
6057 
6058 	return err;
6059 }
6060 
6061 __dead static void
6062 usage_tree(void)
6063 {
6064 	endwin();
6065 	fprintf(stderr,
6066 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6067 	    getprogname());
6068 	exit(1);
6069 }
6070 
6071 static const struct got_error *
6072 cmd_tree(int argc, char *argv[])
6073 {
6074 	const struct got_error *error;
6075 	struct got_repository *repo = NULL;
6076 	struct got_worktree *worktree = NULL;
6077 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6078 	struct got_object_id *commit_id = NULL;
6079 	struct got_commit_object *commit = NULL;
6080 	const char *commit_id_arg = NULL;
6081 	char *label = NULL;
6082 	struct got_reference *ref = NULL;
6083 	const char *head_ref_name = NULL;
6084 	int ch;
6085 	struct tog_view *view;
6086 	int *pack_fds = NULL;
6087 
6088 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6089 		switch (ch) {
6090 		case 'c':
6091 			commit_id_arg = optarg;
6092 			break;
6093 		case 'r':
6094 			repo_path = realpath(optarg, NULL);
6095 			if (repo_path == NULL)
6096 				return got_error_from_errno2("realpath",
6097 				    optarg);
6098 			break;
6099 		default:
6100 			usage_tree();
6101 			/* NOTREACHED */
6102 		}
6103 	}
6104 
6105 	argc -= optind;
6106 	argv += optind;
6107 
6108 	if (argc > 1)
6109 		usage_tree();
6110 
6111 	error = got_repo_pack_fds_open(&pack_fds);
6112 	if (error != NULL)
6113 		goto done;
6114 
6115 	if (repo_path == NULL) {
6116 		cwd = getcwd(NULL, 0);
6117 		if (cwd == NULL)
6118 			return got_error_from_errno("getcwd");
6119 		error = got_worktree_open(&worktree, cwd);
6120 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6121 			goto done;
6122 		if (worktree)
6123 			repo_path =
6124 			    strdup(got_worktree_get_repo_path(worktree));
6125 		else
6126 			repo_path = strdup(cwd);
6127 		if (repo_path == NULL) {
6128 			error = got_error_from_errno("strdup");
6129 			goto done;
6130 		}
6131 	}
6132 
6133 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6134 	if (error != NULL)
6135 		goto done;
6136 
6137 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6138 	    repo, worktree);
6139 	if (error)
6140 		goto done;
6141 
6142 	init_curses();
6143 
6144 	error = apply_unveil(got_repo_get_path(repo), NULL);
6145 	if (error)
6146 		goto done;
6147 
6148 	error = tog_load_refs(repo, 0);
6149 	if (error)
6150 		goto done;
6151 
6152 	if (commit_id_arg == NULL) {
6153 		error = got_repo_match_object_id(&commit_id, &label,
6154 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6155 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6156 		if (error)
6157 			goto done;
6158 		head_ref_name = label;
6159 	} else {
6160 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6161 		if (error == NULL)
6162 			head_ref_name = got_ref_get_name(ref);
6163 		else if (error->code != GOT_ERR_NOT_REF)
6164 			goto done;
6165 		error = got_repo_match_object_id(&commit_id, NULL,
6166 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6167 		if (error)
6168 			goto done;
6169 	}
6170 
6171 	error = got_object_open_as_commit(&commit, repo, commit_id);
6172 	if (error)
6173 		goto done;
6174 
6175 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6176 	if (view == NULL) {
6177 		error = got_error_from_errno("view_open");
6178 		goto done;
6179 	}
6180 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6181 	if (error)
6182 		goto done;
6183 	if (!got_path_is_root_dir(in_repo_path)) {
6184 		error = tree_view_walk_path(&view->state.tree, commit,
6185 		    in_repo_path);
6186 		if (error)
6187 			goto done;
6188 	}
6189 
6190 	if (worktree) {
6191 		/* Release work tree lock. */
6192 		got_worktree_close(worktree);
6193 		worktree = NULL;
6194 	}
6195 	error = view_loop(view);
6196 done:
6197 	free(repo_path);
6198 	free(cwd);
6199 	free(commit_id);
6200 	free(label);
6201 	if (ref)
6202 		got_ref_close(ref);
6203 	if (repo) {
6204 		const struct got_error *close_err = got_repo_close(repo);
6205 		if (error == NULL)
6206 			error = close_err;
6207 	}
6208 	if (pack_fds) {
6209 		const struct got_error *pack_err =
6210 		    got_repo_pack_fds_close(pack_fds);
6211 		if (error == NULL)
6212 			error = pack_err;
6213 	}
6214 	tog_free_refs();
6215 	return error;
6216 }
6217 
6218 static const struct got_error *
6219 ref_view_load_refs(struct tog_ref_view_state *s)
6220 {
6221 	struct got_reflist_entry *sre;
6222 	struct tog_reflist_entry *re;
6223 
6224 	s->nrefs = 0;
6225 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6226 		if (strncmp(got_ref_get_name(sre->ref),
6227 		    "refs/got/", 9) == 0 &&
6228 		    strncmp(got_ref_get_name(sre->ref),
6229 		    "refs/got/backup/", 16) != 0)
6230 			continue;
6231 
6232 		re = malloc(sizeof(*re));
6233 		if (re == NULL)
6234 			return got_error_from_errno("malloc");
6235 
6236 		re->ref = got_ref_dup(sre->ref);
6237 		if (re->ref == NULL)
6238 			return got_error_from_errno("got_ref_dup");
6239 		re->idx = s->nrefs++;
6240 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6241 	}
6242 
6243 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6244 	return NULL;
6245 }
6246 
6247 void
6248 ref_view_free_refs(struct tog_ref_view_state *s)
6249 {
6250 	struct tog_reflist_entry *re;
6251 
6252 	while (!TAILQ_EMPTY(&s->refs)) {
6253 		re = TAILQ_FIRST(&s->refs);
6254 		TAILQ_REMOVE(&s->refs, re, entry);
6255 		got_ref_close(re->ref);
6256 		free(re);
6257 	}
6258 }
6259 
6260 static const struct got_error *
6261 open_ref_view(struct tog_view *view, struct got_repository *repo)
6262 {
6263 	const struct got_error *err = NULL;
6264 	struct tog_ref_view_state *s = &view->state.ref;
6265 
6266 	s->selected_entry = 0;
6267 	s->repo = repo;
6268 
6269 	TAILQ_INIT(&s->refs);
6270 	STAILQ_INIT(&s->colors);
6271 
6272 	err = ref_view_load_refs(s);
6273 	if (err)
6274 		return err;
6275 
6276 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6277 		err = add_color(&s->colors, "^refs/heads/",
6278 		    TOG_COLOR_REFS_HEADS,
6279 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6280 		if (err)
6281 			goto done;
6282 
6283 		err = add_color(&s->colors, "^refs/tags/",
6284 		    TOG_COLOR_REFS_TAGS,
6285 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6286 		if (err)
6287 			goto done;
6288 
6289 		err = add_color(&s->colors, "^refs/remotes/",
6290 		    TOG_COLOR_REFS_REMOTES,
6291 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6292 		if (err)
6293 			goto done;
6294 
6295 		err = add_color(&s->colors, "^refs/got/backup/",
6296 		    TOG_COLOR_REFS_BACKUP,
6297 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6298 		if (err)
6299 			goto done;
6300 	}
6301 
6302 	view->show = show_ref_view;
6303 	view->input = input_ref_view;
6304 	view->close = close_ref_view;
6305 	view->search_start = search_start_ref_view;
6306 	view->search_next = search_next_ref_view;
6307 done:
6308 	if (err)
6309 		free_colors(&s->colors);
6310 	return err;
6311 }
6312 
6313 static const struct got_error *
6314 close_ref_view(struct tog_view *view)
6315 {
6316 	struct tog_ref_view_state *s = &view->state.ref;
6317 
6318 	ref_view_free_refs(s);
6319 	free_colors(&s->colors);
6320 
6321 	return NULL;
6322 }
6323 
6324 static const struct got_error *
6325 resolve_reflist_entry(struct got_object_id **commit_id,
6326     struct tog_reflist_entry *re, struct got_repository *repo)
6327 {
6328 	const struct got_error *err = NULL;
6329 	struct got_object_id *obj_id;
6330 	struct got_tag_object *tag = NULL;
6331 	int obj_type;
6332 
6333 	*commit_id = NULL;
6334 
6335 	err = got_ref_resolve(&obj_id, repo, re->ref);
6336 	if (err)
6337 		return err;
6338 
6339 	err = got_object_get_type(&obj_type, repo, obj_id);
6340 	if (err)
6341 		goto done;
6342 
6343 	switch (obj_type) {
6344 	case GOT_OBJ_TYPE_COMMIT:
6345 		*commit_id = obj_id;
6346 		break;
6347 	case GOT_OBJ_TYPE_TAG:
6348 		err = got_object_open_as_tag(&tag, repo, obj_id);
6349 		if (err)
6350 			goto done;
6351 		free(obj_id);
6352 		err = got_object_get_type(&obj_type, repo,
6353 		    got_object_tag_get_object_id(tag));
6354 		if (err)
6355 			goto done;
6356 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6357 			err = got_error(GOT_ERR_OBJ_TYPE);
6358 			goto done;
6359 		}
6360 		*commit_id = got_object_id_dup(
6361 		    got_object_tag_get_object_id(tag));
6362 		if (*commit_id == NULL) {
6363 			err = got_error_from_errno("got_object_id_dup");
6364 			goto done;
6365 		}
6366 		break;
6367 	default:
6368 		err = got_error(GOT_ERR_OBJ_TYPE);
6369 		break;
6370 	}
6371 
6372 done:
6373 	if (tag)
6374 		got_object_tag_close(tag);
6375 	if (err) {
6376 		free(*commit_id);
6377 		*commit_id = NULL;
6378 	}
6379 	return err;
6380 }
6381 
6382 static const struct got_error *
6383 log_ref_entry(struct tog_view **new_view, int begin_x,
6384     struct tog_reflist_entry *re, struct got_repository *repo)
6385 {
6386 	struct tog_view *log_view;
6387 	const struct got_error *err = NULL;
6388 	struct got_object_id *commit_id = NULL;
6389 
6390 	*new_view = NULL;
6391 
6392 	err = resolve_reflist_entry(&commit_id, re, repo);
6393 	if (err) {
6394 		if (err->code != GOT_ERR_OBJ_TYPE)
6395 			return err;
6396 		else
6397 			return NULL;
6398 	}
6399 
6400 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6401 	if (log_view == NULL) {
6402 		err = got_error_from_errno("view_open");
6403 		goto done;
6404 	}
6405 
6406 	err = open_log_view(log_view, commit_id, repo,
6407 	    got_ref_get_name(re->ref), "", 0);
6408 done:
6409 	if (err)
6410 		view_close(log_view);
6411 	else
6412 		*new_view = log_view;
6413 	free(commit_id);
6414 	return err;
6415 }
6416 
6417 static void
6418 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6419 {
6420 	struct tog_reflist_entry *re;
6421 	int i = 0;
6422 
6423 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6424 		return;
6425 
6426 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6427 	while (i++ < maxscroll) {
6428 		if (re == NULL)
6429 			break;
6430 		s->first_displayed_entry = re;
6431 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6432 	}
6433 }
6434 
6435 static void
6436 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6437 {
6438 	struct tog_reflist_entry *next, *last;
6439 	int n = 0;
6440 
6441 	if (s->first_displayed_entry)
6442 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6443 	else
6444 		next = TAILQ_FIRST(&s->refs);
6445 
6446 	last = s->last_displayed_entry;
6447 	while (next && last && n++ < maxscroll) {
6448 		last = TAILQ_NEXT(last, entry);
6449 		if (last) {
6450 			s->first_displayed_entry = next;
6451 			next = TAILQ_NEXT(next, entry);
6452 		}
6453 	}
6454 }
6455 
6456 static const struct got_error *
6457 search_start_ref_view(struct tog_view *view)
6458 {
6459 	struct tog_ref_view_state *s = &view->state.ref;
6460 
6461 	s->matched_entry = NULL;
6462 	return NULL;
6463 }
6464 
6465 static int
6466 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6467 {
6468 	regmatch_t regmatch;
6469 
6470 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6471 	    0) == 0;
6472 }
6473 
6474 static const struct got_error *
6475 search_next_ref_view(struct tog_view *view)
6476 {
6477 	struct tog_ref_view_state *s = &view->state.ref;
6478 	struct tog_reflist_entry *re = NULL;
6479 
6480 	if (!view->searching) {
6481 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6482 		return NULL;
6483 	}
6484 
6485 	if (s->matched_entry) {
6486 		if (view->searching == TOG_SEARCH_FORWARD) {
6487 			if (s->selected_entry)
6488 				re = TAILQ_NEXT(s->selected_entry, entry);
6489 			else
6490 				re = TAILQ_PREV(s->selected_entry,
6491 				    tog_reflist_head, entry);
6492 		} else {
6493 			if (s->selected_entry == NULL)
6494 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6495 			else
6496 				re = TAILQ_PREV(s->selected_entry,
6497 				    tog_reflist_head, entry);
6498 		}
6499 	} else {
6500 		if (s->selected_entry)
6501 			re = s->selected_entry;
6502 		else if (view->searching == TOG_SEARCH_FORWARD)
6503 			re = TAILQ_FIRST(&s->refs);
6504 		else
6505 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6506 	}
6507 
6508 	while (1) {
6509 		if (re == NULL) {
6510 			if (s->matched_entry == NULL) {
6511 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6512 				return NULL;
6513 			}
6514 			if (view->searching == TOG_SEARCH_FORWARD)
6515 				re = TAILQ_FIRST(&s->refs);
6516 			else
6517 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6518 		}
6519 
6520 		if (match_reflist_entry(re, &view->regex)) {
6521 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6522 			s->matched_entry = re;
6523 			break;
6524 		}
6525 
6526 		if (view->searching == TOG_SEARCH_FORWARD)
6527 			re = TAILQ_NEXT(re, entry);
6528 		else
6529 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6530 	}
6531 
6532 	if (s->matched_entry) {
6533 		s->first_displayed_entry = s->matched_entry;
6534 		s->selected = 0;
6535 	}
6536 
6537 	return NULL;
6538 }
6539 
6540 static const struct got_error *
6541 show_ref_view(struct tog_view *view)
6542 {
6543 	const struct got_error *err = NULL;
6544 	struct tog_ref_view_state *s = &view->state.ref;
6545 	struct tog_reflist_entry *re;
6546 	char *line = NULL;
6547 	wchar_t *wline;
6548 	struct tog_color *tc;
6549 	int width, n;
6550 	int limit = view->nlines;
6551 
6552 	werase(view->window);
6553 
6554 	s->ndisplayed = 0;
6555 
6556 	if (limit == 0)
6557 		return NULL;
6558 
6559 	re = s->first_displayed_entry;
6560 
6561 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6562 	    s->nrefs) == -1)
6563 		return got_error_from_errno("asprintf");
6564 
6565 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6566 	if (err) {
6567 		free(line);
6568 		return err;
6569 	}
6570 	if (view_needs_focus_indication(view))
6571 		wstandout(view->window);
6572 	waddwstr(view->window, wline);
6573 	if (view_needs_focus_indication(view))
6574 		wstandend(view->window);
6575 	free(wline);
6576 	wline = NULL;
6577 	free(line);
6578 	line = NULL;
6579 	if (width < view->ncols - 1)
6580 		waddch(view->window, '\n');
6581 	if (--limit <= 0)
6582 		return NULL;
6583 
6584 	n = 0;
6585 	while (re && limit > 0) {
6586 		char *line = NULL;
6587 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6588 
6589 		if (s->show_date) {
6590 			struct got_commit_object *ci;
6591 			struct got_tag_object *tag;
6592 			struct got_object_id *id;
6593 			struct tm tm;
6594 			time_t t;
6595 
6596 			err = got_ref_resolve(&id, s->repo, re->ref);
6597 			if (err)
6598 				return err;
6599 			err = got_object_open_as_tag(&tag, s->repo, id);
6600 			if (err) {
6601 				if (err->code != GOT_ERR_OBJ_TYPE) {
6602 					free(id);
6603 					return err;
6604 				}
6605 				err = got_object_open_as_commit(&ci, s->repo,
6606 				    id);
6607 				if (err) {
6608 					free(id);
6609 					return err;
6610 				}
6611 				t = got_object_commit_get_committer_time(ci);
6612 				got_object_commit_close(ci);
6613 			} else {
6614 				t = got_object_tag_get_tagger_time(tag);
6615 				got_object_tag_close(tag);
6616 			}
6617 			free(id);
6618 			if (gmtime_r(&t, &tm) == NULL)
6619 				return got_error_from_errno("gmtime_r");
6620 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6621 				return got_error(GOT_ERR_NO_SPACE);
6622 		}
6623 		if (got_ref_is_symbolic(re->ref)) {
6624 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6625 			    ymd : "", got_ref_get_name(re->ref),
6626 			    got_ref_get_symref_target(re->ref)) == -1)
6627 				return got_error_from_errno("asprintf");
6628 		} else if (s->show_ids) {
6629 			struct got_object_id *id;
6630 			char *id_str;
6631 			err = got_ref_resolve(&id, s->repo, re->ref);
6632 			if (err)
6633 				return err;
6634 			err = got_object_id_str(&id_str, id);
6635 			if (err) {
6636 				free(id);
6637 				return err;
6638 			}
6639 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6640 			    got_ref_get_name(re->ref), id_str) == -1) {
6641 				err = got_error_from_errno("asprintf");
6642 				free(id);
6643 				free(id_str);
6644 				return err;
6645 			}
6646 			free(id);
6647 			free(id_str);
6648 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6649 		    got_ref_get_name(re->ref)) == -1)
6650 			return got_error_from_errno("asprintf");
6651 
6652 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6653 		    0, 0);
6654 		if (err) {
6655 			free(line);
6656 			return err;
6657 		}
6658 		if (n == s->selected) {
6659 			if (view->focussed)
6660 				wstandout(view->window);
6661 			s->selected_entry = re;
6662 		}
6663 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6664 		if (tc)
6665 			wattr_on(view->window,
6666 			    COLOR_PAIR(tc->colorpair), NULL);
6667 		waddwstr(view->window, wline);
6668 		if (tc)
6669 			wattr_off(view->window,
6670 			    COLOR_PAIR(tc->colorpair), NULL);
6671 		if (width < view->ncols - 1)
6672 			waddch(view->window, '\n');
6673 		if (n == s->selected && view->focussed)
6674 			wstandend(view->window);
6675 		free(line);
6676 		free(wline);
6677 		wline = NULL;
6678 		n++;
6679 		s->ndisplayed++;
6680 		s->last_displayed_entry = re;
6681 
6682 		limit--;
6683 		re = TAILQ_NEXT(re, entry);
6684 	}
6685 
6686 	view_vborder(view);
6687 	return err;
6688 }
6689 
6690 static const struct got_error *
6691 browse_ref_tree(struct tog_view **new_view, int begin_x,
6692     struct tog_reflist_entry *re, struct got_repository *repo)
6693 {
6694 	const struct got_error *err = NULL;
6695 	struct got_object_id *commit_id = NULL;
6696 	struct tog_view *tree_view;
6697 
6698 	*new_view = NULL;
6699 
6700 	err = resolve_reflist_entry(&commit_id, re, repo);
6701 	if (err) {
6702 		if (err->code != GOT_ERR_OBJ_TYPE)
6703 			return err;
6704 		else
6705 			return NULL;
6706 	}
6707 
6708 
6709 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6710 	if (tree_view == NULL) {
6711 		err = got_error_from_errno("view_open");
6712 		goto done;
6713 	}
6714 
6715 	err = open_tree_view(tree_view, commit_id,
6716 	    got_ref_get_name(re->ref), repo);
6717 	if (err)
6718 		goto done;
6719 
6720 	*new_view = tree_view;
6721 done:
6722 	free(commit_id);
6723 	return err;
6724 }
6725 static const struct got_error *
6726 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6727 {
6728 	const struct got_error *err = NULL;
6729 	struct tog_ref_view_state *s = &view->state.ref;
6730 	struct tog_view *log_view, *tree_view;
6731 	struct tog_reflist_entry *re;
6732 	int begin_x = 0, n, nscroll = view->nlines - 1;
6733 
6734 	switch (ch) {
6735 	case 'i':
6736 		s->show_ids = !s->show_ids;
6737 		break;
6738 	case 'm':
6739 		s->show_date = !s->show_date;
6740 		break;
6741 	case 'o':
6742 		s->sort_by_date = !s->sort_by_date;
6743 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6744 		    got_ref_cmp_by_commit_timestamp_descending :
6745 		    tog_ref_cmp_by_name, s->repo);
6746 		if (err)
6747 			break;
6748 		got_reflist_object_id_map_free(tog_refs_idmap);
6749 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6750 		    &tog_refs, s->repo);
6751 		if (err)
6752 			break;
6753 		ref_view_free_refs(s);
6754 		err = ref_view_load_refs(s);
6755 		break;
6756 	case KEY_ENTER:
6757 	case '\r':
6758 		if (!s->selected_entry)
6759 			break;
6760 		if (view_is_parent_view(view))
6761 			begin_x = view_split_begin_x(view->begin_x);
6762 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6763 		    s->repo);
6764 		view->focussed = 0;
6765 		log_view->focussed = 1;
6766 		if (view_is_parent_view(view)) {
6767 			err = view_close_child(view);
6768 			if (err)
6769 				return err;
6770 			err = view_set_child(view, log_view);
6771 			if (err)
6772 				return err;
6773 			view->focus_child = 1;
6774 		} else
6775 			*new_view = log_view;
6776 		break;
6777 	case 't':
6778 		if (!s->selected_entry)
6779 			break;
6780 		if (view_is_parent_view(view))
6781 			begin_x = view_split_begin_x(view->begin_x);
6782 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6783 		    s->repo);
6784 		if (err || tree_view == NULL)
6785 			break;
6786 		view->focussed = 0;
6787 		tree_view->focussed = 1;
6788 		if (view_is_parent_view(view)) {
6789 			err = view_close_child(view);
6790 			if (err)
6791 				return err;
6792 			err = view_set_child(view, tree_view);
6793 			if (err)
6794 				return err;
6795 			view->focus_child = 1;
6796 		} else
6797 			*new_view = tree_view;
6798 		break;
6799 	case 'g':
6800 	case KEY_HOME:
6801 		s->selected = 0;
6802 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6803 		break;
6804 	case 'G':
6805 	case KEY_END:
6806 		s->selected = 0;
6807 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6808 		for (n = 0; n < view->nlines - 1; n++) {
6809 			if (re == NULL)
6810 				break;
6811 			s->first_displayed_entry = re;
6812 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6813 		}
6814 		if (n > 0)
6815 			s->selected = n - 1;
6816 		break;
6817 	case 'k':
6818 	case KEY_UP:
6819 	case CTRL('p'):
6820 		if (s->selected > 0) {
6821 			s->selected--;
6822 			break;
6823 		}
6824 		ref_scroll_up(s, 1);
6825 		break;
6826 	case CTRL('u'):
6827 	case 'u':
6828 		nscroll /= 2;
6829 		/* FALL THROUGH */
6830 	case KEY_PPAGE:
6831 	case CTRL('b'):
6832 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6833 			s->selected -= MIN(nscroll, s->selected);
6834 		ref_scroll_up(s, MAX(0, nscroll));
6835 		break;
6836 	case 'j':
6837 	case KEY_DOWN:
6838 	case CTRL('n'):
6839 		if (s->selected < s->ndisplayed - 1) {
6840 			s->selected++;
6841 			break;
6842 		}
6843 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6844 			/* can't scroll any further */
6845 			break;
6846 		ref_scroll_down(s, 1);
6847 		break;
6848 	case CTRL('d'):
6849 	case 'd':
6850 		nscroll /= 2;
6851 		/* FALL THROUGH */
6852 	case KEY_NPAGE:
6853 	case CTRL('f'):
6854 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6855 			/* can't scroll any further; move cursor down */
6856 			if (s->selected < s->ndisplayed - 1)
6857 				s->selected += MIN(nscroll,
6858 				    s->ndisplayed - s->selected - 1);
6859 			break;
6860 		}
6861 		ref_scroll_down(s, nscroll);
6862 		break;
6863 	case CTRL('l'):
6864 		tog_free_refs();
6865 		err = tog_load_refs(s->repo, s->sort_by_date);
6866 		if (err)
6867 			break;
6868 		ref_view_free_refs(s);
6869 		err = ref_view_load_refs(s);
6870 		break;
6871 	case KEY_RESIZE:
6872 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6873 			s->selected = view->nlines - 2;
6874 		break;
6875 	default:
6876 		break;
6877 	}
6878 
6879 	return err;
6880 }
6881 
6882 __dead static void
6883 usage_ref(void)
6884 {
6885 	endwin();
6886 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6887 	    getprogname());
6888 	exit(1);
6889 }
6890 
6891 static const struct got_error *
6892 cmd_ref(int argc, char *argv[])
6893 {
6894 	const struct got_error *error;
6895 	struct got_repository *repo = NULL;
6896 	struct got_worktree *worktree = NULL;
6897 	char *cwd = NULL, *repo_path = NULL;
6898 	int ch;
6899 	struct tog_view *view;
6900 	int *pack_fds = NULL;
6901 
6902 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6903 		switch (ch) {
6904 		case 'r':
6905 			repo_path = realpath(optarg, NULL);
6906 			if (repo_path == NULL)
6907 				return got_error_from_errno2("realpath",
6908 				    optarg);
6909 			break;
6910 		default:
6911 			usage_ref();
6912 			/* NOTREACHED */
6913 		}
6914 	}
6915 
6916 	argc -= optind;
6917 	argv += optind;
6918 
6919 	if (argc > 1)
6920 		usage_ref();
6921 
6922 	error = got_repo_pack_fds_open(&pack_fds);
6923 	if (error != NULL)
6924 		goto done;
6925 
6926 	if (repo_path == NULL) {
6927 		cwd = getcwd(NULL, 0);
6928 		if (cwd == NULL)
6929 			return got_error_from_errno("getcwd");
6930 		error = got_worktree_open(&worktree, cwd);
6931 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6932 			goto done;
6933 		if (worktree)
6934 			repo_path =
6935 			    strdup(got_worktree_get_repo_path(worktree));
6936 		else
6937 			repo_path = strdup(cwd);
6938 		if (repo_path == NULL) {
6939 			error = got_error_from_errno("strdup");
6940 			goto done;
6941 		}
6942 	}
6943 
6944 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6945 	if (error != NULL)
6946 		goto done;
6947 
6948 	init_curses();
6949 
6950 	error = apply_unveil(got_repo_get_path(repo), NULL);
6951 	if (error)
6952 		goto done;
6953 
6954 	error = tog_load_refs(repo, 0);
6955 	if (error)
6956 		goto done;
6957 
6958 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6959 	if (view == NULL) {
6960 		error = got_error_from_errno("view_open");
6961 		goto done;
6962 	}
6963 
6964 	error = open_ref_view(view, repo);
6965 	if (error)
6966 		goto done;
6967 
6968 	if (worktree) {
6969 		/* Release work tree lock. */
6970 		got_worktree_close(worktree);
6971 		worktree = NULL;
6972 	}
6973 	error = view_loop(view);
6974 done:
6975 	free(repo_path);
6976 	free(cwd);
6977 	if (repo) {
6978 		const struct got_error *close_err = got_repo_close(repo);
6979 		if (close_err)
6980 			error = close_err;
6981 	}
6982 	if (pack_fds) {
6983 		const struct got_error *pack_err =
6984 		    got_repo_pack_fds_close(pack_fds);
6985 		if (error == NULL)
6986 			error = pack_err;
6987 	}
6988 	tog_free_refs();
6989 	return error;
6990 }
6991 
6992 static void
6993 list_commands(FILE *fp)
6994 {
6995 	size_t i;
6996 
6997 	fprintf(fp, "commands:");
6998 	for (i = 0; i < nitems(tog_commands); i++) {
6999 		const struct tog_cmd *cmd = &tog_commands[i];
7000 		fprintf(fp, " %s", cmd->name);
7001 	}
7002 	fputc('\n', fp);
7003 }
7004 
7005 __dead static void
7006 usage(int hflag, int status)
7007 {
7008 	FILE *fp = (status == 0) ? stdout : stderr;
7009 
7010 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7011 	    getprogname());
7012 	if (hflag) {
7013 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7014 		list_commands(fp);
7015 	}
7016 	exit(status);
7017 }
7018 
7019 static char **
7020 make_argv(int argc, ...)
7021 {
7022 	va_list ap;
7023 	char **argv;
7024 	int i;
7025 
7026 	va_start(ap, argc);
7027 
7028 	argv = calloc(argc, sizeof(char *));
7029 	if (argv == NULL)
7030 		err(1, "calloc");
7031 	for (i = 0; i < argc; i++) {
7032 		argv[i] = strdup(va_arg(ap, char *));
7033 		if (argv[i] == NULL)
7034 			err(1, "strdup");
7035 	}
7036 
7037 	va_end(ap);
7038 	return argv;
7039 }
7040 
7041 /*
7042  * Try to convert 'tog path' into a 'tog log path' command.
7043  * The user could simply have mistyped the command rather than knowingly
7044  * provided a path. So check whether argv[0] can in fact be resolved
7045  * to a path in the HEAD commit and print a special error if not.
7046  * This hack is for mpi@ <3
7047  */
7048 static const struct got_error *
7049 tog_log_with_path(int argc, char *argv[])
7050 {
7051 	const struct got_error *error = NULL, *close_err;
7052 	const struct tog_cmd *cmd = NULL;
7053 	struct got_repository *repo = NULL;
7054 	struct got_worktree *worktree = NULL;
7055 	struct got_object_id *commit_id = NULL, *id = NULL;
7056 	struct got_commit_object *commit = NULL;
7057 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7058 	char *commit_id_str = NULL, **cmd_argv = NULL;
7059 	int *pack_fds = NULL;
7060 
7061 	cwd = getcwd(NULL, 0);
7062 	if (cwd == NULL)
7063 		return got_error_from_errno("getcwd");
7064 
7065 	error = got_repo_pack_fds_open(&pack_fds);
7066 	if (error != NULL)
7067 		goto done;
7068 
7069 	error = got_worktree_open(&worktree, cwd);
7070 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7071 		goto done;
7072 
7073 	if (worktree)
7074 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7075 	else
7076 		repo_path = strdup(cwd);
7077 	if (repo_path == NULL) {
7078 		error = got_error_from_errno("strdup");
7079 		goto done;
7080 	}
7081 
7082 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7083 	if (error != NULL)
7084 		goto done;
7085 
7086 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7087 	    repo, worktree);
7088 	if (error)
7089 		goto done;
7090 
7091 	error = tog_load_refs(repo, 0);
7092 	if (error)
7093 		goto done;
7094 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7095 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7096 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7097 	if (error)
7098 		goto done;
7099 
7100 	if (worktree) {
7101 		got_worktree_close(worktree);
7102 		worktree = NULL;
7103 	}
7104 
7105 	error = got_object_open_as_commit(&commit, repo, commit_id);
7106 	if (error)
7107 		goto done;
7108 
7109 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7110 	if (error) {
7111 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7112 			goto done;
7113 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7114 		    getprogname(), argv[0]);
7115 		usage(1, 1);
7116 		/* not reached */
7117 	}
7118 
7119 	close_err = got_repo_close(repo);
7120 	if (error == NULL)
7121 		error = close_err;
7122 	repo = NULL;
7123 
7124 	error = got_object_id_str(&commit_id_str, commit_id);
7125 	if (error)
7126 		goto done;
7127 
7128 	cmd = &tog_commands[0]; /* log */
7129 	argc = 4;
7130 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7131 	error = cmd->cmd_main(argc, cmd_argv);
7132 done:
7133 	if (repo) {
7134 		close_err = got_repo_close(repo);
7135 		if (error == NULL)
7136 			error = close_err;
7137 	}
7138 	if (commit)
7139 		got_object_commit_close(commit);
7140 	if (worktree)
7141 		got_worktree_close(worktree);
7142 	if (pack_fds) {
7143 		const struct got_error *pack_err =
7144 		    got_repo_pack_fds_close(pack_fds);
7145 		if (error == NULL)
7146 			error = pack_err;
7147 	}
7148 	free(id);
7149 	free(commit_id_str);
7150 	free(commit_id);
7151 	free(cwd);
7152 	free(repo_path);
7153 	free(in_repo_path);
7154 	if (cmd_argv) {
7155 		int i;
7156 		for (i = 0; i < argc; i++)
7157 			free(cmd_argv[i]);
7158 		free(cmd_argv);
7159 	}
7160 	tog_free_refs();
7161 	return error;
7162 }
7163 
7164 int
7165 main(int argc, char *argv[])
7166 {
7167 	const struct got_error *error = NULL;
7168 	const struct tog_cmd *cmd = NULL;
7169 	int ch, hflag = 0, Vflag = 0;
7170 	char **cmd_argv = NULL;
7171 	static const struct option longopts[] = {
7172 	    { "version", no_argument, NULL, 'V' },
7173 	    { NULL, 0, NULL, 0}
7174 	};
7175 
7176 	setlocale(LC_CTYPE, "");
7177 
7178 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7179 		switch (ch) {
7180 		case 'h':
7181 			hflag = 1;
7182 			break;
7183 		case 'V':
7184 			Vflag = 1;
7185 			break;
7186 		default:
7187 			usage(hflag, 1);
7188 			/* NOTREACHED */
7189 		}
7190 	}
7191 
7192 	argc -= optind;
7193 	argv += optind;
7194 	optind = 1;
7195 	optreset = 1;
7196 
7197 	if (Vflag) {
7198 		got_version_print_str();
7199 		return 0;
7200 	}
7201 
7202 #ifndef PROFILE
7203 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7204 	    NULL) == -1)
7205 		err(1, "pledge");
7206 #endif
7207 
7208 	if (argc == 0) {
7209 		if (hflag)
7210 			usage(hflag, 0);
7211 		/* Build an argument vector which runs a default command. */
7212 		cmd = &tog_commands[0];
7213 		argc = 1;
7214 		cmd_argv = make_argv(argc, cmd->name);
7215 	} else {
7216 		size_t i;
7217 
7218 		/* Did the user specify a command? */
7219 		for (i = 0; i < nitems(tog_commands); i++) {
7220 			if (strncmp(tog_commands[i].name, argv[0],
7221 			    strlen(argv[0])) == 0) {
7222 				cmd = &tog_commands[i];
7223 				break;
7224 			}
7225 		}
7226 	}
7227 
7228 	if (cmd == NULL) {
7229 		if (argc != 1)
7230 			usage(0, 1);
7231 		/* No command specified; try log with a path */
7232 		error = tog_log_with_path(argc, argv);
7233 	} else {
7234 		if (hflag)
7235 			cmd->cmd_usage();
7236 		else
7237 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7238 	}
7239 
7240 	endwin();
7241 	putchar('\n');
7242 	if (cmd_argv) {
7243 		int i;
7244 		for (i = 0; i < argc; i++)
7245 			free(cmd_argv[i]);
7246 		free(cmd_argv);
7247 	}
7248 
7249 	if (error && error->code != GOT_ERR_CANCELLED)
7250 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7251 	return 0;
7252 }