1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
24 #include <curses.h>
25 #include <panel.h>
26 #include <locale.h>
27 #include <sha1.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <getopt.h>
33 #include <string.h>
34 #include <err.h>
35 #include <unistd.h>
36 #include <limits.h>
37 #include <wchar.h>
38 #include <time.h>
39 #include <pthread.h>
40 #include <libgen.h>
41 #include <regex.h>
42 #include <sched.h>
43 
44 #include "got_version.h"
45 #include "got_error.h"
46 #include "got_object.h"
47 #include "got_reference.h"
48 #include "got_repository.h"
49 #include "got_diff.h"
50 #include "got_opentemp.h"
51 #include "got_utf8.h"
52 #include "got_cancel.h"
53 #include "got_commit_graph.h"
54 #include "got_blame.h"
55 #include "got_privsep.h"
56 #include "got_path.h"
57 #include "got_worktree.h"
58 
59 #ifndef MIN
60 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
61 #endif
62 
63 #ifndef MAX
64 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
65 #endif
66 
67 #define CTRL(x)		((x) & 0x1f)
68 
69 #ifndef nitems
70 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
71 #endif
72 
73 struct tog_cmd {
74 	const char *name;
75 	const struct got_error *(*cmd_main)(int, char *[]);
76 	void (*cmd_usage)(void);
77 };
78 
79 __dead static void	usage(int, int);
80 __dead static void	usage_log(void);
81 __dead static void	usage_diff(void);
82 __dead static void	usage_blame(void);
83 __dead static void	usage_tree(void);
84 __dead static void	usage_ref(void);
85 
86 static const struct got_error*	cmd_log(int, char *[]);
87 static const struct got_error*	cmd_diff(int, char *[]);
88 static const struct got_error*	cmd_blame(int, char *[]);
89 static const struct got_error*	cmd_tree(int, char *[]);
90 static const struct got_error*	cmd_ref(int, char *[]);
91 
92 static const struct tog_cmd tog_commands[] = {
93 	{ "log",	cmd_log,	usage_log },
94 	{ "diff",	cmd_diff,	usage_diff },
95 	{ "blame",	cmd_blame,	usage_blame },
96 	{ "tree",	cmd_tree,	usage_tree },
97 	{ "ref",	cmd_ref,	usage_ref },
98 };
99 
100 enum tog_view_type {
101 	TOG_VIEW_DIFF,
102 	TOG_VIEW_LOG,
103 	TOG_VIEW_BLAME,
104 	TOG_VIEW_TREE,
105 	TOG_VIEW_REF,
106 };
107 
108 #define TOG_EOF_STRING	"(END)"
109 
110 struct commit_queue_entry {
111 	TAILQ_ENTRY(commit_queue_entry) entry;
112 	struct got_object_id *id;
113 	struct got_commit_object *commit;
114 	int idx;
115 };
116 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
117 struct commit_queue {
118 	int ncommits;
119 	struct commit_queue_head head;
120 };
121 
122 struct tog_color {
123 	STAILQ_ENTRY(tog_color) entry;
124 	regex_t regex;
125 	short colorpair;
126 };
127 STAILQ_HEAD(tog_colors, tog_color);
128 
129 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
130 static struct got_reflist_object_id_map *tog_refs_idmap;
131 
132 static const struct got_error *
133 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
134     struct got_reference* re2)
135 {
136 	const char *name1 = got_ref_get_name(re1);
137 	const char *name2 = got_ref_get_name(re2);
138 	int isbackup1, isbackup2;
139 
140 	/* Sort backup refs towards the bottom of the list. */
141 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
142 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
143 	if (!isbackup1 && isbackup2) {
144 		*cmp = -1;
145 		return NULL;
146 	} else if (isbackup1 && !isbackup2) {
147 		*cmp = 1;
148 		return NULL;
149 	}
150 
151 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
152 	return NULL;
153 }
154 
155 static const struct got_error *
156 tog_load_refs(struct got_repository *repo, int sort_by_date)
157 {
158 	const struct got_error *err;
159 
160 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
161 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
162 	    repo);
163 	if (err)
164 		return err;
165 
166 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
167 	    repo);
168 }
169 
170 static void
171 tog_free_refs(void)
172 {
173 	if (tog_refs_idmap) {
174 		got_reflist_object_id_map_free(tog_refs_idmap);
175 		tog_refs_idmap = NULL;
176 	}
177 	got_ref_list_free(&tog_refs);
178 }
179 
180 static const struct got_error *
181 add_color(struct tog_colors *colors, const char *pattern,
182     int idx, short color)
183 {
184 	const struct got_error *err = NULL;
185 	struct tog_color *tc;
186 	int regerr = 0;
187 
188 	if (idx < 1 || idx > COLOR_PAIRS - 1)
189 		return NULL;
190 
191 	init_pair(idx, color, -1);
192 
193 	tc = calloc(1, sizeof(*tc));
194 	if (tc == NULL)
195 		return got_error_from_errno("calloc");
196 	regerr = regcomp(&tc->regex, pattern,
197 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
198 	if (regerr) {
199 		static char regerr_msg[512];
200 		static char err_msg[512];
201 		regerror(regerr, &tc->regex, regerr_msg,
202 		    sizeof(regerr_msg));
203 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
204 		    regerr_msg);
205 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
206 		free(tc);
207 		return err;
208 	}
209 	tc->colorpair = idx;
210 	STAILQ_INSERT_HEAD(colors, tc, entry);
211 	return NULL;
212 }
213 
214 static void
215 free_colors(struct tog_colors *colors)
216 {
217 	struct tog_color *tc;
218 
219 	while (!STAILQ_EMPTY(colors)) {
220 		tc = STAILQ_FIRST(colors);
221 		STAILQ_REMOVE_HEAD(colors, entry);
222 		regfree(&tc->regex);
223 		free(tc);
224 	}
225 }
226 
227 static struct tog_color *
228 get_color(struct tog_colors *colors, int colorpair)
229 {
230 	struct tog_color *tc = NULL;
231 
232 	STAILQ_FOREACH(tc, colors, entry) {
233 		if (tc->colorpair == colorpair)
234 			return tc;
235 	}
236 
237 	return NULL;
238 }
239 
240 static int
241 default_color_value(const char *envvar)
242 {
243 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
244 		return COLOR_MAGENTA;
245 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
246 		return COLOR_CYAN;
247 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
248 		return COLOR_YELLOW;
249 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
250 		return COLOR_GREEN;
251 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
252 		return COLOR_MAGENTA;
253 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
254 		return COLOR_MAGENTA;
255 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
256 		return COLOR_CYAN;
257 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
258 		return COLOR_GREEN;
259 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
260 		return COLOR_GREEN;
261 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
262 		return COLOR_CYAN;
263 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
264 		return COLOR_YELLOW;
265 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
266 		return COLOR_GREEN;
267 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
268 		return COLOR_MAGENTA;
269 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
270 		return COLOR_YELLOW;
271 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
272 		return COLOR_CYAN;
273 
274 	return -1;
275 }
276 
277 static int
278 get_color_value(const char *envvar)
279 {
280 	const char *val = getenv(envvar);
281 
282 	if (val == NULL)
283 		return default_color_value(envvar);
284 
285 	if (strcasecmp(val, "black") == 0)
286 		return COLOR_BLACK;
287 	if (strcasecmp(val, "red") == 0)
288 		return COLOR_RED;
289 	if (strcasecmp(val, "green") == 0)
290 		return COLOR_GREEN;
291 	if (strcasecmp(val, "yellow") == 0)
292 		return COLOR_YELLOW;
293 	if (strcasecmp(val, "blue") == 0)
294 		return COLOR_BLUE;
295 	if (strcasecmp(val, "magenta") == 0)
296 		return COLOR_MAGENTA;
297 	if (strcasecmp(val, "cyan") == 0)
298 		return COLOR_CYAN;
299 	if (strcasecmp(val, "white") == 0)
300 		return COLOR_WHITE;
301 	if (strcasecmp(val, "default") == 0)
302 		return -1;
303 
304 	return default_color_value(envvar);
305 }
306 
307 
308 struct tog_diff_view_state {
309 	struct got_object_id *id1, *id2;
310 	const char *label1, *label2;
311 	FILE *f, *f1, *f2;
312 	int first_displayed_line;
313 	int last_displayed_line;
314 	int eof;
315 	int diff_context;
316 	int ignore_whitespace;
317 	int force_text_diff;
318 	struct got_repository *repo;
319 	struct tog_colors colors;
320 	size_t nlines;
321 	off_t *line_offsets;
322 	int matched_line;
323 	int selected_line;
324 
325 	/* passed from log view; may be NULL */
326 	struct tog_view *log_view;
327 };
328 
329 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
330 
331 struct tog_log_thread_args {
332 	pthread_cond_t need_commits;
333 	pthread_cond_t commit_loaded;
334 	int commits_needed;
335 	int load_all;
336 	struct got_commit_graph *graph;
337 	struct commit_queue *commits;
338 	const char *in_repo_path;
339 	struct got_object_id *start_id;
340 	struct got_repository *repo;
341 	int *pack_fds;
342 	int log_complete;
343 	sig_atomic_t *quit;
344 	struct commit_queue_entry **first_displayed_entry;
345 	struct commit_queue_entry **selected_entry;
346 	int *searching;
347 	int *search_next_done;
348 	regex_t *regex;
349 };
350 
351 struct tog_log_view_state {
352 	struct commit_queue commits;
353 	struct commit_queue_entry *first_displayed_entry;
354 	struct commit_queue_entry *last_displayed_entry;
355 	struct commit_queue_entry *selected_entry;
356 	int selected;
357 	char *in_repo_path;
358 	char *head_ref_name;
359 	int log_branches;
360 	struct got_repository *repo;
361 	struct got_object_id *start_id;
362 	sig_atomic_t quit;
363 	pthread_t thread;
364 	struct tog_log_thread_args thread_args;
365 	struct commit_queue_entry *matched_entry;
366 	struct commit_queue_entry *search_entry;
367 	struct tog_colors colors;
368 };
369 
370 #define TOG_COLOR_DIFF_MINUS		1
371 #define TOG_COLOR_DIFF_PLUS		2
372 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
373 #define TOG_COLOR_DIFF_META		4
374 #define TOG_COLOR_TREE_SUBMODULE	5
375 #define TOG_COLOR_TREE_SYMLINK		6
376 #define TOG_COLOR_TREE_DIRECTORY	7
377 #define TOG_COLOR_TREE_EXECUTABLE	8
378 #define TOG_COLOR_COMMIT		9
379 #define TOG_COLOR_AUTHOR		10
380 #define TOG_COLOR_DATE			11
381 #define TOG_COLOR_REFS_HEADS		12
382 #define TOG_COLOR_REFS_TAGS		13
383 #define TOG_COLOR_REFS_REMOTES		14
384 #define TOG_COLOR_REFS_BACKUP		15
385 
386 struct tog_blame_cb_args {
387 	struct tog_blame_line *lines; /* one per line */
388 	int nlines;
389 
390 	struct tog_view *view;
391 	struct got_object_id *commit_id;
392 	int *quit;
393 };
394 
395 struct tog_blame_thread_args {
396 	const char *path;
397 	struct got_repository *repo;
398 	struct tog_blame_cb_args *cb_args;
399 	int *complete;
400 	got_cancel_cb cancel_cb;
401 	void *cancel_arg;
402 };
403 
404 struct tog_blame {
405 	FILE *f;
406 	off_t filesize;
407 	struct tog_blame_line *lines;
408 	int nlines;
409 	off_t *line_offsets;
410 	pthread_t thread;
411 	struct tog_blame_thread_args thread_args;
412 	struct tog_blame_cb_args cb_args;
413 	const char *path;
414 	int *pack_fds;
415 };
416 
417 struct tog_blame_view_state {
418 	int first_displayed_line;
419 	int last_displayed_line;
420 	int selected_line;
421 	int blame_complete;
422 	int eof;
423 	int done;
424 	struct got_object_id_queue blamed_commits;
425 	struct got_object_qid *blamed_commit;
426 	char *path;
427 	struct got_repository *repo;
428 	struct got_object_id *commit_id;
429 	struct tog_blame blame;
430 	int matched_line;
431 	struct tog_colors colors;
432 };
433 
434 struct tog_parent_tree {
435 	TAILQ_ENTRY(tog_parent_tree) entry;
436 	struct got_tree_object *tree;
437 	struct got_tree_entry *first_displayed_entry;
438 	struct got_tree_entry *selected_entry;
439 	int selected;
440 };
441 
442 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
443 
444 struct tog_tree_view_state {
445 	char *tree_label;
446 	struct got_object_id *commit_id;/* commit which this tree belongs to */
447 	struct got_tree_object *root;	/* the commit's root tree entry */
448 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
449 	struct got_tree_entry *first_displayed_entry;
450 	struct got_tree_entry *last_displayed_entry;
451 	struct got_tree_entry *selected_entry;
452 	int ndisplayed, selected, show_ids;
453 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
454 	char *head_ref_name;
455 	struct got_repository *repo;
456 	struct got_tree_entry *matched_entry;
457 	struct tog_colors colors;
458 };
459 
460 struct tog_reflist_entry {
461 	TAILQ_ENTRY(tog_reflist_entry) entry;
462 	struct got_reference *ref;
463 	int idx;
464 };
465 
466 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
467 
468 struct tog_ref_view_state {
469 	struct tog_reflist_head refs;
470 	struct tog_reflist_entry *first_displayed_entry;
471 	struct tog_reflist_entry *last_displayed_entry;
472 	struct tog_reflist_entry *selected_entry;
473 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
474 	struct got_repository *repo;
475 	struct tog_reflist_entry *matched_entry;
476 	struct tog_colors colors;
477 };
478 
479 /*
480  * We implement two types of views: parent views and child views.
481  *
482  * The 'Tab' key switches focus between a parent view and its child view.
483  * Child views are shown side-by-side to their parent view, provided
484  * there is enough screen estate.
485  *
486  * When a new view is opened from within a parent view, this new view
487  * becomes a child view of the parent view, replacing any existing child.
488  *
489  * When a new view is opened from within a child view, this new view
490  * becomes a parent view which will obscure the views below until the
491  * user quits the new parent view by typing 'q'.
492  *
493  * This list of views contains parent views only.
494  * Child views are only pointed to by their parent view.
495  */
496 TAILQ_HEAD(tog_view_list_head, tog_view);
497 
498 struct tog_view {
499 	TAILQ_ENTRY(tog_view) entry;
500 	WINDOW *window;
501 	PANEL *panel;
502 	int nlines, ncols, begin_y, begin_x;
503 	int maxx, x; /* max column and current start column */
504 	int lines, cols; /* copies of LINES and COLS */
505 	int ch, count; /* current keymap and count prefix */
506 	int focussed; /* Only set on one parent or child view at a time. */
507 	int dying;
508 	struct tog_view *parent;
509 	struct tog_view *child;
510 
511 	/*
512 	 * This flag is initially set on parent views when a new child view
513 	 * is created. It gets toggled when the 'Tab' key switches focus
514 	 * between parent and child.
515 	 * The flag indicates whether focus should be passed on to our child
516 	 * view if this parent view gets picked for focus after another parent
517 	 * view was closed. This prevents child views from losing focus in such
518 	 * situations.
519 	 */
520 	int focus_child;
521 
522 	/* type-specific state */
523 	enum tog_view_type type;
524 	union {
525 		struct tog_diff_view_state diff;
526 		struct tog_log_view_state log;
527 		struct tog_blame_view_state blame;
528 		struct tog_tree_view_state tree;
529 		struct tog_ref_view_state ref;
530 	} state;
531 
532 	const struct got_error *(*show)(struct tog_view *);
533 	const struct got_error *(*input)(struct tog_view **,
534 	    struct tog_view *, int);
535 	const struct got_error *(*close)(struct tog_view *);
536 
537 	const struct got_error *(*search_start)(struct tog_view *);
538 	const struct got_error *(*search_next)(struct tog_view *);
539 	int search_started;
540 	int searching;
541 #define TOG_SEARCH_FORWARD	1
542 #define TOG_SEARCH_BACKWARD	2
543 	int search_next_done;
544 #define TOG_SEARCH_HAVE_MORE	1
545 #define TOG_SEARCH_NO_MORE	2
546 #define TOG_SEARCH_HAVE_NONE	3
547 	regex_t regex;
548 	regmatch_t regmatch;
549 };
550 
551 static const struct got_error *open_diff_view(struct tog_view *,
552     struct got_object_id *, struct got_object_id *,
553     const char *, const char *, int, int, int, struct tog_view *,
554     struct got_repository *);
555 static const struct got_error *show_diff_view(struct tog_view *);
556 static const struct got_error *input_diff_view(struct tog_view **,
557     struct tog_view *, int);
558 static const struct got_error* close_diff_view(struct tog_view *);
559 static const struct got_error *search_start_diff_view(struct tog_view *);
560 static const struct got_error *search_next_diff_view(struct tog_view *);
561 
562 static const struct got_error *open_log_view(struct tog_view *,
563     struct got_object_id *, struct got_repository *,
564     const char *, const char *, int);
565 static const struct got_error * show_log_view(struct tog_view *);
566 static const struct got_error *input_log_view(struct tog_view **,
567     struct tog_view *, int);
568 static const struct got_error *close_log_view(struct tog_view *);
569 static const struct got_error *search_start_log_view(struct tog_view *);
570 static const struct got_error *search_next_log_view(struct tog_view *);
571 
572 static const struct got_error *open_blame_view(struct tog_view *, char *,
573     struct got_object_id *, struct got_repository *);
574 static const struct got_error *show_blame_view(struct tog_view *);
575 static const struct got_error *input_blame_view(struct tog_view **,
576     struct tog_view *, int);
577 static const struct got_error *close_blame_view(struct tog_view *);
578 static const struct got_error *search_start_blame_view(struct tog_view *);
579 static const struct got_error *search_next_blame_view(struct tog_view *);
580 
581 static const struct got_error *open_tree_view(struct tog_view *,
582     struct got_object_id *, const char *, struct got_repository *);
583 static const struct got_error *show_tree_view(struct tog_view *);
584 static const struct got_error *input_tree_view(struct tog_view **,
585     struct tog_view *, int);
586 static const struct got_error *close_tree_view(struct tog_view *);
587 static const struct got_error *search_start_tree_view(struct tog_view *);
588 static const struct got_error *search_next_tree_view(struct tog_view *);
589 
590 static const struct got_error *open_ref_view(struct tog_view *,
591     struct got_repository *);
592 static const struct got_error *show_ref_view(struct tog_view *);
593 static const struct got_error *input_ref_view(struct tog_view **,
594     struct tog_view *, int);
595 static const struct got_error *close_ref_view(struct tog_view *);
596 static const struct got_error *search_start_ref_view(struct tog_view *);
597 static const struct got_error *search_next_ref_view(struct tog_view *);
598 
599 static volatile sig_atomic_t tog_sigwinch_received;
600 static volatile sig_atomic_t tog_sigpipe_received;
601 static volatile sig_atomic_t tog_sigcont_received;
602 static volatile sig_atomic_t tog_sigint_received;
603 static volatile sig_atomic_t tog_sigterm_received;
604 
605 static void
606 tog_sigwinch(int signo)
607 {
608 	tog_sigwinch_received = 1;
609 }
610 
611 static void
612 tog_sigpipe(int signo)
613 {
614 	tog_sigpipe_received = 1;
615 }
616 
617 static void
618 tog_sigcont(int signo)
619 {
620 	tog_sigcont_received = 1;
621 }
622 
623 static void
624 tog_sigint(int signo)
625 {
626 	tog_sigint_received = 1;
627 }
628 
629 static void
630 tog_sigterm(int signo)
631 {
632 	tog_sigterm_received = 1;
633 }
634 
635 static int
636 tog_fatal_signal_received(void)
637 {
638 	return (tog_sigpipe_received ||
639 	    tog_sigint_received || tog_sigint_received);
640 }
641 
642 
643 static const struct got_error *
644 view_close(struct tog_view *view)
645 {
646 	const struct got_error *err = NULL;
647 
648 	if (view->child) {
649 		view_close(view->child);
650 		view->child = NULL;
651 	}
652 	if (view->close)
653 		err = view->close(view);
654 	if (view->panel)
655 		del_panel(view->panel);
656 	if (view->window)
657 		delwin(view->window);
658 	free(view);
659 	return err;
660 }
661 
662 static struct tog_view *
663 view_open(int nlines, int ncols, int begin_y, int begin_x,
664     enum tog_view_type type)
665 {
666 	struct tog_view *view = calloc(1, sizeof(*view));
667 
668 	if (view == NULL)
669 		return NULL;
670 
671 	view->ch = 0;
672 	view->count = 0;
673 	view->type = type;
674 	view->lines = LINES;
675 	view->cols = COLS;
676 	view->nlines = nlines ? nlines : LINES - begin_y;
677 	view->ncols = ncols ? ncols : COLS - begin_x;
678 	view->begin_y = begin_y;
679 	view->begin_x = begin_x;
680 	view->window = newwin(nlines, ncols, begin_y, begin_x);
681 	if (view->window == NULL) {
682 		view_close(view);
683 		return NULL;
684 	}
685 	view->panel = new_panel(view->window);
686 	if (view->panel == NULL ||
687 	    set_panel_userptr(view->panel, view) != OK) {
688 		view_close(view);
689 		return NULL;
690 	}
691 
692 	keypad(view->window, TRUE);
693 	return view;
694 }
695 
696 static int
697 view_split_begin_x(int begin_x)
698 {
699 	if (begin_x > 0 || COLS < 120)
700 		return 0;
701 	return (COLS - MAX(COLS / 2, 80));
702 }
703 
704 static const struct got_error *view_resize(struct tog_view *);
705 
706 static const struct got_error *
707 view_splitscreen(struct tog_view *view)
708 {
709 	const struct got_error *err = NULL;
710 
711 	view->begin_y = 0;
712 	view->begin_x = view_split_begin_x(0);
713 	view->nlines = LINES;
714 	view->ncols = COLS - view->begin_x;
715 	view->lines = LINES;
716 	view->cols = COLS;
717 	err = view_resize(view);
718 	if (err)
719 		return err;
720 
721 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
722 		return got_error_from_errno("mvwin");
723 
724 	return NULL;
725 }
726 
727 static const struct got_error *
728 view_fullscreen(struct tog_view *view)
729 {
730 	const struct got_error *err = NULL;
731 
732 	view->begin_x = 0;
733 	view->begin_y = 0;
734 	view->nlines = LINES;
735 	view->ncols = COLS;
736 	view->lines = LINES;
737 	view->cols = COLS;
738 	err = view_resize(view);
739 	if (err)
740 		return err;
741 
742 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
743 		return got_error_from_errno("mvwin");
744 
745 	return NULL;
746 }
747 
748 static int
749 view_is_parent_view(struct tog_view *view)
750 {
751 	return view->parent == NULL;
752 }
753 
754 static int
755 view_is_splitscreen(struct tog_view *view)
756 {
757 	return view->begin_x > 0;
758 }
759 
760 
761 static const struct got_error *
762 view_resize(struct tog_view *view)
763 {
764 	int nlines, ncols;
765 
766 	if (view->lines > LINES)
767 		nlines = view->nlines - (view->lines - LINES);
768 	else
769 		nlines = view->nlines + (LINES - view->lines);
770 
771 	if (view->cols > COLS)
772 		ncols = view->ncols - (view->cols - COLS);
773 	else
774 		ncols = view->ncols + (COLS - view->cols);
775 
776 	if (view->child && view_is_splitscreen(view->child)) {
777 		view->child->begin_x = view_split_begin_x(view->begin_x);
778 		if (view->child->begin_x == 0) {
779 			ncols = COLS;
780 
781 			view_fullscreen(view->child);
782 			if (view->child->focussed)
783 				show_panel(view->child->panel);
784 			else
785 				show_panel(view->panel);
786 		} else {
787 			ncols = view->child->begin_x;
788 
789 			view_splitscreen(view->child);
790 			show_panel(view->child->panel);
791 		}
792 	} else if (view->parent == NULL)
793 		ncols = COLS;
794 
795 	if (wresize(view->window, nlines, ncols) == ERR)
796 		return got_error_from_errno("wresize");
797 	if (replace_panel(view->panel, view->window) == ERR)
798 		return got_error_from_errno("replace_panel");
799 	wclear(view->window);
800 
801 	view->nlines = nlines;
802 	view->ncols = ncols;
803 	view->lines = LINES;
804 	view->cols = COLS;
805 
806 	return NULL;
807 }
808 
809 static const struct got_error *
810 view_close_child(struct tog_view *view)
811 {
812 	const struct got_error *err = NULL;
813 
814 	if (view->child == NULL)
815 		return NULL;
816 
817 	err = view_close(view->child);
818 	view->child = NULL;
819 	return err;
820 }
821 
822 static const struct got_error *
823 view_set_child(struct tog_view *view, struct tog_view *child)
824 {
825 	view->child = child;
826 	child->parent = view;
827 
828 	return view_resize(view);
829 }
830 
831 static void
832 tog_resizeterm(void)
833 {
834 	int cols, lines;
835 	struct winsize size;
836 
837 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
838 		cols = 80;     /* Default */
839 		lines = 24;
840 	} else {
841 		cols = size.ws_col;
842 		lines = size.ws_row;
843 	}
844 	resize_term(lines, cols);
845 }
846 
847 static const struct got_error *
848 view_search_start(struct tog_view *view)
849 {
850 	const struct got_error *err = NULL;
851 	char pattern[1024];
852 	int ret;
853 
854 	if (view->search_started) {
855 		regfree(&view->regex);
856 		view->searching = 0;
857 		memset(&view->regmatch, 0, sizeof(view->regmatch));
858 	}
859 	view->search_started = 0;
860 
861 	if (view->nlines < 1)
862 		return NULL;
863 
864 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
865 	wclrtoeol(view->window);
866 
867 	nocbreak();
868 	echo();
869 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
870 	cbreak();
871 	noecho();
872 	if (ret == ERR)
873 		return NULL;
874 
875 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
876 		err = view->search_start(view);
877 		if (err) {
878 			regfree(&view->regex);
879 			return err;
880 		}
881 		view->search_started = 1;
882 		view->searching = TOG_SEARCH_FORWARD;
883 		view->search_next_done = 0;
884 		view->search_next(view);
885 	}
886 
887 	return NULL;
888 }
889 
890 /*
891  * Compute view->count from numeric user input.  User has five-tenths of a
892  * second to follow each numeric keypress with another number to form count.
893  * Return first non-numeric input or ERR and assign total to view->count.
894  * XXX Should we add support for user-defined timeout?
895  */
896 static int
897 get_compound_key(struct tog_view *view, int c)
898 {
899 	int x, n = 0;
900 
901 	view->count = 0;
902 	halfdelay(5);  /* block for half a second */
903 	wattron(view->window, A_BOLD);
904 	wmove(view->window, view->nlines - 1, 0);
905 	wclrtoeol(view->window);
906 	waddch(view->window, ':');
907 
908 	do {
909 		x = getcurx(view->window);
910 		if (x != ERR && x < view->ncols)
911 			waddch(view->window, c);
912 		/*
913 		 * Don't overflow. Max valid request should be the greatest
914 		 * between the longest and total lines; cap at 10 million.
915 		 */
916 		if (n >= 9999999)
917 			n = 9999999;
918 		else
919 			n = n * 10 + (c - '0');
920 	} while (((c = wgetch(view->window))) >= '0' && c <= '9' && c != ERR);
921 
922 	/* Massage excessive or inapplicable values at the input handler. */
923 	view->count = n;
924 
925 	wattroff(view->window, A_BOLD);
926 	cbreak();  /* return to blocking */
927 	return c;
928 }
929 
930 static const struct got_error *
931 view_input(struct tog_view **new, int *done, struct tog_view *view,
932     struct tog_view_list_head *views)
933 {
934 	const struct got_error *err = NULL;
935 	struct tog_view *v;
936 	int ch, errcode;
937 
938 	*new = NULL;
939 
940 	/* Clear "no matches" indicator. */
941 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
942 	    view->search_next_done == TOG_SEARCH_HAVE_NONE) {
943 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
944 		view->count = 0;
945 	}
946 
947 	if (view->searching && !view->search_next_done) {
948 		errcode = pthread_mutex_unlock(&tog_mutex);
949 		if (errcode)
950 			return got_error_set_errno(errcode,
951 			    "pthread_mutex_unlock");
952 		sched_yield();
953 		errcode = pthread_mutex_lock(&tog_mutex);
954 		if (errcode)
955 			return got_error_set_errno(errcode,
956 			    "pthread_mutex_lock");
957 		view->search_next(view);
958 		return NULL;
959 	}
960 
961 	nodelay(stdscr, FALSE);
962 	/* Allow threads to make progress while we are waiting for input. */
963 	errcode = pthread_mutex_unlock(&tog_mutex);
964 	if (errcode)
965 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
966 	/* If we have an unfinished count, don't get a new key map. */
967 	ch = view->ch;
968 	if ((view->count && --view->count == 0) || !view->count) {
969 		ch = wgetch(view->window);
970 		if (ch >= '1' && ch  <= '9')
971 			view->ch = ch = get_compound_key(view, ch);
972 	}
973 	errcode = pthread_mutex_lock(&tog_mutex);
974 	if (errcode)
975 		return got_error_set_errno(errcode, "pthread_mutex_lock");
976 	nodelay(stdscr, TRUE);
977 
978 	if (tog_sigwinch_received || tog_sigcont_received) {
979 		tog_resizeterm();
980 		tog_sigwinch_received = 0;
981 		tog_sigcont_received = 0;
982 		TAILQ_FOREACH(v, views, entry) {
983 			err = view_resize(v);
984 			if (err)
985 				return err;
986 			err = v->input(new, v, KEY_RESIZE);
987 			if (err)
988 				return err;
989 			if (v->child) {
990 				err = view_resize(v->child);
991 				if (err)
992 					return err;
993 				err = v->child->input(new, v->child,
994 				    KEY_RESIZE);
995 				if (err)
996 					return err;
997 			}
998 		}
999 	}
1000 
1001 	switch (ch) {
1002 	case '\t':
1003 		view->count = 0;
1004 		if (view->child) {
1005 			view->focussed = 0;
1006 			view->child->focussed = 1;
1007 			view->focus_child = 1;
1008 		} else if (view->parent) {
1009 			view->focussed = 0;
1010 			view->parent->focussed = 1;
1011 			view->parent->focus_child = 0;
1012 			if (!view_is_splitscreen(view))
1013 				err = view_fullscreen(view->parent);
1014 		}
1015 		break;
1016 	case 'q':
1017 		err = view->input(new, view, ch);
1018 		view->dying = 1;
1019 		break;
1020 	case 'Q':
1021 		*done = 1;
1022 		break;
1023 	case 'F':
1024 		view->count = 0;
1025 		if (view_is_parent_view(view)) {
1026 			if (view->child == NULL)
1027 				break;
1028 			if (view_is_splitscreen(view->child)) {
1029 				view->focussed = 0;
1030 				view->child->focussed = 1;
1031 				err = view_fullscreen(view->child);
1032 			} else
1033 				err = view_splitscreen(view->child);
1034 			if (err)
1035 				break;
1036 			err = view->child->input(new, view->child,
1037 			    KEY_RESIZE);
1038 		} else {
1039 			if (view_is_splitscreen(view)) {
1040 				view->parent->focussed = 0;
1041 				view->focussed = 1;
1042 				err = view_fullscreen(view);
1043 			} else {
1044 				err = view_splitscreen(view);
1045 				if (!err)
1046 					err = view_resize(view->parent);
1047 			}
1048 			if (err)
1049 				break;
1050 			err = view->input(new, view, KEY_RESIZE);
1051 		}
1052 		break;
1053 	case KEY_RESIZE:
1054 		break;
1055 	case '/':
1056 		view->count = 0;
1057 		if (view->search_start)
1058 			view_search_start(view);
1059 		else
1060 			err = view->input(new, view, ch);
1061 		break;
1062 	case 'N':
1063 	case 'n':
1064 		if (view->search_started && view->search_next) {
1065 			view->searching = (ch == 'n' ?
1066 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1067 			view->search_next_done = 0;
1068 			view->search_next(view);
1069 		} else
1070 			err = view->input(new, view, ch);
1071 		break;
1072 	default:
1073 		err = view->input(new, view, ch);
1074 		break;
1075 	}
1076 
1077 	return err;
1078 }
1079 
1080 static void
1081 view_vborder(struct tog_view *view)
1082 {
1083 	PANEL *panel;
1084 	const struct tog_view *view_above;
1085 
1086 	if (view->parent)
1087 		return view_vborder(view->parent);
1088 
1089 	panel = panel_above(view->panel);
1090 	if (panel == NULL)
1091 		return;
1092 
1093 	view_above = panel_userptr(panel);
1094 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1095 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
1096 }
1097 
1098 static int
1099 view_needs_focus_indication(struct tog_view *view)
1100 {
1101 	if (view_is_parent_view(view)) {
1102 		if (view->child == NULL || view->child->focussed)
1103 			return 0;
1104 		if (!view_is_splitscreen(view->child))
1105 			return 0;
1106 	} else if (!view_is_splitscreen(view))
1107 		return 0;
1108 
1109 	return view->focussed;
1110 }
1111 
1112 static const struct got_error *
1113 view_loop(struct tog_view *view)
1114 {
1115 	const struct got_error *err = NULL;
1116 	struct tog_view_list_head views;
1117 	struct tog_view *new_view;
1118 	int fast_refresh = 10;
1119 	int done = 0, errcode;
1120 
1121 	errcode = pthread_mutex_lock(&tog_mutex);
1122 	if (errcode)
1123 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1124 
1125 	TAILQ_INIT(&views);
1126 	TAILQ_INSERT_HEAD(&views, view, entry);
1127 
1128 	view->focussed = 1;
1129 	err = view->show(view);
1130 	if (err)
1131 		return err;
1132 	update_panels();
1133 	doupdate();
1134 	while (!TAILQ_EMPTY(&views) && !done && !tog_fatal_signal_received()) {
1135 		/* Refresh fast during initialization, then become slower. */
1136 		if (fast_refresh && fast_refresh-- == 0)
1137 			halfdelay(10); /* switch to once per second */
1138 
1139 		err = view_input(&new_view, &done, view, &views);
1140 		if (err)
1141 			break;
1142 		if (view->dying) {
1143 			struct tog_view *v, *prev = NULL;
1144 
1145 			if (view_is_parent_view(view))
1146 				prev = TAILQ_PREV(view, tog_view_list_head,
1147 				    entry);
1148 			else if (view->parent)
1149 				prev = view->parent;
1150 
1151 			if (view->parent) {
1152 				view->parent->child = NULL;
1153 				view->parent->focus_child = 0;
1154 
1155 				err = view_resize(view->parent);
1156 				if (err)
1157 					break;
1158 			} else
1159 				TAILQ_REMOVE(&views, view, entry);
1160 
1161 			err = view_close(view);
1162 			if (err)
1163 				goto done;
1164 
1165 			view = NULL;
1166 			TAILQ_FOREACH(v, &views, entry) {
1167 				if (v->focussed)
1168 					break;
1169 			}
1170 			if (view == NULL && new_view == NULL) {
1171 				/* No view has focus. Try to pick one. */
1172 				if (prev)
1173 					view = prev;
1174 				else if (!TAILQ_EMPTY(&views)) {
1175 					view = TAILQ_LAST(&views,
1176 					    tog_view_list_head);
1177 				}
1178 				if (view) {
1179 					if (view->focus_child) {
1180 						view->child->focussed = 1;
1181 						view = view->child;
1182 					} else
1183 						view->focussed = 1;
1184 				}
1185 			}
1186 		}
1187 		if (new_view) {
1188 			struct tog_view *v, *t;
1189 			/* Only allow one parent view per type. */
1190 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1191 				if (v->type != new_view->type)
1192 					continue;
1193 				TAILQ_REMOVE(&views, v, entry);
1194 				err = view_close(v);
1195 				if (err)
1196 					goto done;
1197 				break;
1198 			}
1199 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1200 			view = new_view;
1201 		}
1202 		if (view) {
1203 			if (view_is_parent_view(view)) {
1204 				if (view->child && view->child->focussed)
1205 					view = view->child;
1206 			} else {
1207 				if (view->parent && view->parent->focussed)
1208 					view = view->parent;
1209 			}
1210 			show_panel(view->panel);
1211 			if (view->child && view_is_splitscreen(view->child))
1212 				show_panel(view->child->panel);
1213 			if (view->parent && view_is_splitscreen(view)) {
1214 				err = view->parent->show(view->parent);
1215 				if (err)
1216 					goto done;
1217 			}
1218 			err = view->show(view);
1219 			if (err)
1220 				goto done;
1221 			if (view->child) {
1222 				err = view->child->show(view->child);
1223 				if (err)
1224 					goto done;
1225 			}
1226 			update_panels();
1227 			doupdate();
1228 		}
1229 	}
1230 done:
1231 	while (!TAILQ_EMPTY(&views)) {
1232 		view = TAILQ_FIRST(&views);
1233 		TAILQ_REMOVE(&views, view, entry);
1234 		view_close(view);
1235 	}
1236 
1237 	errcode = pthread_mutex_unlock(&tog_mutex);
1238 	if (errcode && err == NULL)
1239 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1240 
1241 	return err;
1242 }
1243 
1244 __dead static void
1245 usage_log(void)
1246 {
1247 	endwin();
1248 	fprintf(stderr,
1249 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1250 	    getprogname());
1251 	exit(1);
1252 }
1253 
1254 /* Create newly allocated wide-character string equivalent to a byte string. */
1255 static const struct got_error *
1256 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1257 {
1258 	char *vis = NULL;
1259 	const struct got_error *err = NULL;
1260 
1261 	*ws = NULL;
1262 	*wlen = mbstowcs(NULL, s, 0);
1263 	if (*wlen == (size_t)-1) {
1264 		int vislen;
1265 		if (errno != EILSEQ)
1266 			return got_error_from_errno("mbstowcs");
1267 
1268 		/* byte string invalid in current encoding; try to "fix" it */
1269 		err = got_mbsavis(&vis, &vislen, s);
1270 		if (err)
1271 			return err;
1272 		*wlen = mbstowcs(NULL, vis, 0);
1273 		if (*wlen == (size_t)-1) {
1274 			err = got_error_from_errno("mbstowcs"); /* give up */
1275 			goto done;
1276 		}
1277 	}
1278 
1279 	*ws = calloc(*wlen + 1, sizeof(**ws));
1280 	if (*ws == NULL) {
1281 		err = got_error_from_errno("calloc");
1282 		goto done;
1283 	}
1284 
1285 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1286 		err = got_error_from_errno("mbstowcs");
1287 done:
1288 	free(vis);
1289 	if (err) {
1290 		free(*ws);
1291 		*ws = NULL;
1292 		*wlen = 0;
1293 	}
1294 	return err;
1295 }
1296 
1297 static const struct got_error *
1298 expand_tab(char **ptr, const char *src)
1299 {
1300 	char	*dst;
1301 	size_t	 len, n, idx = 0, sz = 0;
1302 
1303 	*ptr = NULL;
1304 	n = len = strlen(src);
1305 	dst = malloc(n + 1);
1306 	if (dst == NULL)
1307 		return got_error_from_errno("malloc");
1308 
1309 	while (idx < len && src[idx]) {
1310 		const char c = src[idx];
1311 
1312 		if (c == '\t') {
1313 			size_t nb = TABSIZE - sz % TABSIZE;
1314 			char *p;
1315 
1316 			p = realloc(dst, n + nb);
1317 			if (p == NULL) {
1318 				free(dst);
1319 				return got_error_from_errno("realloc");
1320 
1321 			}
1322 			dst = p;
1323 			n += nb;
1324 			memset(dst + sz, ' ', nb);
1325 			sz += nb;
1326 		} else
1327 			dst[sz++] = src[idx];
1328 		++idx;
1329 	}
1330 
1331 	dst[sz] = '\0';
1332 	*ptr = dst;
1333 	return NULL;
1334 }
1335 
1336 /*
1337  * Advance at most n columns from wline starting at offset off.
1338  * Return the index to the first character after the span operation.
1339  * Return the combined column width of all spanned wide character in
1340  * *rcol.
1341  */
1342 static int
1343 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1344 {
1345 	int width, i, cols = 0;
1346 
1347 	if (n == 0) {
1348 		*rcol = cols;
1349 		return off;
1350 	}
1351 
1352 	for (i = off; wline[i] != L'\0'; ++i) {
1353 		if (wline[i] == L'\t')
1354 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1355 		else
1356 			width = wcwidth(wline[i]);
1357 
1358 		if (width == -1) {
1359 			width = 1;
1360 			wline[i] = L'.';
1361 		}
1362 
1363 		if (cols + width > n)
1364 			break;
1365 		cols += width;
1366 	}
1367 
1368 	*rcol = cols;
1369 	return i;
1370 }
1371 
1372 /*
1373  * Format a line for display, ensuring that it won't overflow a width limit.
1374  * With scrolling, the width returned refers to the scrolled version of the
1375  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1376  */
1377 static const struct got_error *
1378 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1379     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1380 {
1381 	const struct got_error *err = NULL;
1382 	int cols;
1383 	wchar_t *wline = NULL;
1384 	char *exstr = NULL;
1385 	size_t wlen;
1386 	int i, scrollx;
1387 
1388 	*wlinep = NULL;
1389 	*widthp = 0;
1390 
1391 	if (expand) {
1392 		err = expand_tab(&exstr, line);
1393 		if (err)
1394 			return err;
1395 	}
1396 
1397 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1398 	free(exstr);
1399 	if (err)
1400 		return err;
1401 
1402 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1403 
1404 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1405 		wline[wlen - 1] = L'\0';
1406 		wlen--;
1407 	}
1408 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1409 		wline[wlen - 1] = L'\0';
1410 		wlen--;
1411 	}
1412 
1413 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1414 	wline[i] = L'\0';
1415 
1416 	if (widthp)
1417 		*widthp = cols;
1418 	if (scrollxp)
1419 		*scrollxp = scrollx;
1420 	if (err)
1421 		free(wline);
1422 	else
1423 		*wlinep = wline;
1424 	return err;
1425 }
1426 
1427 static const struct got_error*
1428 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1429     struct got_object_id *id, struct got_repository *repo)
1430 {
1431 	static const struct got_error *err = NULL;
1432 	struct got_reflist_entry *re;
1433 	char *s;
1434 	const char *name;
1435 
1436 	*refs_str = NULL;
1437 
1438 	TAILQ_FOREACH(re, refs, entry) {
1439 		struct got_tag_object *tag = NULL;
1440 		struct got_object_id *ref_id;
1441 		int cmp;
1442 
1443 		name = got_ref_get_name(re->ref);
1444 		if (strcmp(name, GOT_REF_HEAD) == 0)
1445 			continue;
1446 		if (strncmp(name, "refs/", 5) == 0)
1447 			name += 5;
1448 		if (strncmp(name, "got/", 4) == 0 &&
1449 		    strncmp(name, "got/backup/", 11) != 0)
1450 			continue;
1451 		if (strncmp(name, "heads/", 6) == 0)
1452 			name += 6;
1453 		if (strncmp(name, "remotes/", 8) == 0) {
1454 			name += 8;
1455 			s = strstr(name, "/" GOT_REF_HEAD);
1456 			if (s != NULL && s[strlen(s)] == '\0')
1457 				continue;
1458 		}
1459 		err = got_ref_resolve(&ref_id, repo, re->ref);
1460 		if (err)
1461 			break;
1462 		if (strncmp(name, "tags/", 5) == 0) {
1463 			err = got_object_open_as_tag(&tag, repo, ref_id);
1464 			if (err) {
1465 				if (err->code != GOT_ERR_OBJ_TYPE) {
1466 					free(ref_id);
1467 					break;
1468 				}
1469 				/* Ref points at something other than a tag. */
1470 				err = NULL;
1471 				tag = NULL;
1472 			}
1473 		}
1474 		cmp = got_object_id_cmp(tag ?
1475 		    got_object_tag_get_object_id(tag) : ref_id, id);
1476 		free(ref_id);
1477 		if (tag)
1478 			got_object_tag_close(tag);
1479 		if (cmp != 0)
1480 			continue;
1481 		s = *refs_str;
1482 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1483 		    s ? ", " : "", name) == -1) {
1484 			err = got_error_from_errno("asprintf");
1485 			free(s);
1486 			*refs_str = NULL;
1487 			break;
1488 		}
1489 		free(s);
1490 	}
1491 
1492 	return err;
1493 }
1494 
1495 static const struct got_error *
1496 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1497     int col_tab_align)
1498 {
1499 	char *smallerthan;
1500 
1501 	smallerthan = strchr(author, '<');
1502 	if (smallerthan && smallerthan[1] != '\0')
1503 		author = smallerthan + 1;
1504 	author[strcspn(author, "@>")] = '\0';
1505 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1506 	    col_tab_align, 0);
1507 }
1508 
1509 static const struct got_error *
1510 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1511     struct got_object_id *id, const size_t date_display_cols,
1512     int author_display_cols)
1513 {
1514 	struct tog_log_view_state *s = &view->state.log;
1515 	const struct got_error *err = NULL;
1516 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1517 	char *logmsg0 = NULL, *logmsg = NULL;
1518 	char *author = NULL;
1519 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1520 	int author_width, logmsg_width;
1521 	char *newline, *line = NULL;
1522 	int col, limit, scrollx;
1523 	const int avail = view->ncols;
1524 	struct tm tm;
1525 	time_t committer_time;
1526 	struct tog_color *tc;
1527 
1528 	committer_time = got_object_commit_get_committer_time(commit);
1529 	if (gmtime_r(&committer_time, &tm) == NULL)
1530 		return got_error_from_errno("gmtime_r");
1531 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1532 		return got_error(GOT_ERR_NO_SPACE);
1533 
1534 	if (avail <= date_display_cols)
1535 		limit = MIN(sizeof(datebuf) - 1, avail);
1536 	else
1537 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1538 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1539 	if (tc)
1540 		wattr_on(view->window,
1541 		    COLOR_PAIR(tc->colorpair), NULL);
1542 	waddnstr(view->window, datebuf, limit);
1543 	if (tc)
1544 		wattr_off(view->window,
1545 		    COLOR_PAIR(tc->colorpair), NULL);
1546 	col = limit;
1547 	if (col > avail)
1548 		goto done;
1549 
1550 	if (avail >= 120) {
1551 		char *id_str;
1552 		err = got_object_id_str(&id_str, id);
1553 		if (err)
1554 			goto done;
1555 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1556 		if (tc)
1557 			wattr_on(view->window,
1558 			    COLOR_PAIR(tc->colorpair), NULL);
1559 		wprintw(view->window, "%.8s ", id_str);
1560 		if (tc)
1561 			wattr_off(view->window,
1562 			    COLOR_PAIR(tc->colorpair), NULL);
1563 		free(id_str);
1564 		col += 9;
1565 		if (col > avail)
1566 			goto done;
1567 	}
1568 
1569 	author = strdup(got_object_commit_get_author(commit));
1570 	if (author == NULL) {
1571 		err = got_error_from_errno("strdup");
1572 		goto done;
1573 	}
1574 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1575 	if (err)
1576 		goto done;
1577 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1578 	if (tc)
1579 		wattr_on(view->window,
1580 		    COLOR_PAIR(tc->colorpair), NULL);
1581 	waddwstr(view->window, wauthor);
1582 	if (tc)
1583 		wattr_off(view->window,
1584 		    COLOR_PAIR(tc->colorpair), NULL);
1585 	col += author_width;
1586 	while (col < avail && author_width < author_display_cols + 2) {
1587 		waddch(view->window, ' ');
1588 		col++;
1589 		author_width++;
1590 	}
1591 	if (col > avail)
1592 		goto done;
1593 
1594 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1595 	if (err)
1596 		goto done;
1597 	logmsg = logmsg0;
1598 	while (*logmsg == '\n')
1599 		logmsg++;
1600 	newline = strchr(logmsg, '\n');
1601 	if (newline)
1602 		*newline = '\0';
1603 	limit = avail - col;
1604 	if (view->child && view_is_splitscreen(view->child) && limit > 0)
1605 		limit--;	/* for the border */
1606 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
1607 	    limit, col, 1);
1608 	if (err)
1609 		goto done;
1610 	waddwstr(view->window, &wlogmsg[scrollx]);
1611 	col += MAX(logmsg_width, 0);
1612 	while (col < avail) {
1613 		waddch(view->window, ' ');
1614 		col++;
1615 	}
1616 done:
1617 	free(logmsg0);
1618 	free(wlogmsg);
1619 	free(author);
1620 	free(wauthor);
1621 	free(line);
1622 	return err;
1623 }
1624 
1625 static struct commit_queue_entry *
1626 alloc_commit_queue_entry(struct got_commit_object *commit,
1627     struct got_object_id *id)
1628 {
1629 	struct commit_queue_entry *entry;
1630 
1631 	entry = calloc(1, sizeof(*entry));
1632 	if (entry == NULL)
1633 		return NULL;
1634 
1635 	entry->id = id;
1636 	entry->commit = commit;
1637 	return entry;
1638 }
1639 
1640 static void
1641 pop_commit(struct commit_queue *commits)
1642 {
1643 	struct commit_queue_entry *entry;
1644 
1645 	entry = TAILQ_FIRST(&commits->head);
1646 	TAILQ_REMOVE(&commits->head, entry, entry);
1647 	got_object_commit_close(entry->commit);
1648 	commits->ncommits--;
1649 	/* Don't free entry->id! It is owned by the commit graph. */
1650 	free(entry);
1651 }
1652 
1653 static void
1654 free_commits(struct commit_queue *commits)
1655 {
1656 	while (!TAILQ_EMPTY(&commits->head))
1657 		pop_commit(commits);
1658 }
1659 
1660 static const struct got_error *
1661 match_commit(int *have_match, struct got_object_id *id,
1662     struct got_commit_object *commit, regex_t *regex)
1663 {
1664 	const struct got_error *err = NULL;
1665 	regmatch_t regmatch;
1666 	char *id_str = NULL, *logmsg = NULL;
1667 
1668 	*have_match = 0;
1669 
1670 	err = got_object_id_str(&id_str, id);
1671 	if (err)
1672 		return err;
1673 
1674 	err = got_object_commit_get_logmsg(&logmsg, commit);
1675 	if (err)
1676 		goto done;
1677 
1678 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1679 	    &regmatch, 0) == 0 ||
1680 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1681 	    &regmatch, 0) == 0 ||
1682 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1683 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1684 		*have_match = 1;
1685 done:
1686 	free(id_str);
1687 	free(logmsg);
1688 	return err;
1689 }
1690 
1691 static const struct got_error *
1692 queue_commits(struct tog_log_thread_args *a)
1693 {
1694 	const struct got_error *err = NULL;
1695 
1696 	/*
1697 	 * We keep all commits open throughout the lifetime of the log
1698 	 * view in order to avoid having to re-fetch commits from disk
1699 	 * while updating the display.
1700 	 */
1701 	do {
1702 		struct got_object_id *id;
1703 		struct got_commit_object *commit;
1704 		struct commit_queue_entry *entry;
1705 		int errcode;
1706 
1707 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1708 		    NULL, NULL);
1709 		if (err || id == NULL)
1710 			break;
1711 
1712 		err = got_object_open_as_commit(&commit, a->repo, id);
1713 		if (err)
1714 			break;
1715 		entry = alloc_commit_queue_entry(commit, id);
1716 		if (entry == NULL) {
1717 			err = got_error_from_errno("alloc_commit_queue_entry");
1718 			break;
1719 		}
1720 
1721 		errcode = pthread_mutex_lock(&tog_mutex);
1722 		if (errcode) {
1723 			err = got_error_set_errno(errcode,
1724 			    "pthread_mutex_lock");
1725 			break;
1726 		}
1727 
1728 		entry->idx = a->commits->ncommits;
1729 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1730 		a->commits->ncommits++;
1731 
1732 		if (*a->searching == TOG_SEARCH_FORWARD &&
1733 		    !*a->search_next_done) {
1734 			int have_match;
1735 			err = match_commit(&have_match, id, commit, a->regex);
1736 			if (err)
1737 				break;
1738 			if (have_match)
1739 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1740 		}
1741 
1742 		errcode = pthread_mutex_unlock(&tog_mutex);
1743 		if (errcode && err == NULL)
1744 			err = got_error_set_errno(errcode,
1745 			    "pthread_mutex_unlock");
1746 		if (err)
1747 			break;
1748 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1749 
1750 	return err;
1751 }
1752 
1753 static void
1754 select_commit(struct tog_log_view_state *s)
1755 {
1756 	struct commit_queue_entry *entry;
1757 	int ncommits = 0;
1758 
1759 	entry = s->first_displayed_entry;
1760 	while (entry) {
1761 		if (ncommits == s->selected) {
1762 			s->selected_entry = entry;
1763 			break;
1764 		}
1765 		entry = TAILQ_NEXT(entry, entry);
1766 		ncommits++;
1767 	}
1768 }
1769 
1770 static const struct got_error *
1771 draw_commits(struct tog_view *view)
1772 {
1773 	const struct got_error *err = NULL;
1774 	struct tog_log_view_state *s = &view->state.log;
1775 	struct commit_queue_entry *entry = s->selected_entry;
1776 	const int limit = view->nlines;
1777 	int width;
1778 	int ncommits, author_cols = 4;
1779 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1780 	char *refs_str = NULL;
1781 	wchar_t *wline;
1782 	struct tog_color *tc;
1783 	static const size_t date_display_cols = 12;
1784 
1785 	if (s->selected_entry &&
1786 	    !(view->searching && view->search_next_done == 0)) {
1787 		struct got_reflist_head *refs;
1788 		err = got_object_id_str(&id_str, s->selected_entry->id);
1789 		if (err)
1790 			return err;
1791 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1792 		    s->selected_entry->id);
1793 		if (refs) {
1794 			err = build_refs_str(&refs_str, refs,
1795 			    s->selected_entry->id, s->repo);
1796 			if (err)
1797 				goto done;
1798 		}
1799 	}
1800 
1801 	if (s->thread_args.commits_needed == 0)
1802 		halfdelay(10); /* disable fast refresh */
1803 
1804 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
1805 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1806 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1807 		    (view->searching && !view->search_next_done) ?
1808 		    "searching..." : "loading...") == -1) {
1809 			err = got_error_from_errno("asprintf");
1810 			goto done;
1811 		}
1812 	} else {
1813 		const char *search_str = NULL;
1814 
1815 		if (view->searching) {
1816 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1817 				search_str = "no more matches";
1818 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1819 				search_str = "no matches found";
1820 			else if (!view->search_next_done)
1821 				search_str = "searching...";
1822 		}
1823 
1824 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1825 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1826 		    search_str ? search_str :
1827 		    (refs_str ? refs_str : "")) == -1) {
1828 			err = got_error_from_errno("asprintf");
1829 			goto done;
1830 		}
1831 	}
1832 
1833 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1834 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
1835 		    "........................................",
1836 		    s->in_repo_path, ncommits_str) == -1) {
1837 			err = got_error_from_errno("asprintf");
1838 			header = NULL;
1839 			goto done;
1840 		}
1841 	} else if (asprintf(&header, "commit %s%s",
1842 	    id_str ? id_str : "........................................",
1843 	    ncommits_str) == -1) {
1844 		err = got_error_from_errno("asprintf");
1845 		header = NULL;
1846 		goto done;
1847 	}
1848 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
1849 	if (err)
1850 		goto done;
1851 
1852 	werase(view->window);
1853 
1854 	if (view_needs_focus_indication(view))
1855 		wstandout(view->window);
1856 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1857 	if (tc)
1858 		wattr_on(view->window,
1859 		    COLOR_PAIR(tc->colorpair), NULL);
1860 	waddwstr(view->window, wline);
1861 	if (tc)
1862 		wattr_off(view->window,
1863 		    COLOR_PAIR(tc->colorpair), NULL);
1864 	while (width < view->ncols) {
1865 		waddch(view->window, ' ');
1866 		width++;
1867 	}
1868 	if (view_needs_focus_indication(view))
1869 		wstandend(view->window);
1870 	free(wline);
1871 	if (limit <= 1)
1872 		goto done;
1873 
1874 	/* Grow author column size if necessary, and set view->maxx. */
1875 	entry = s->first_displayed_entry;
1876 	ncommits = 0;
1877 	view->maxx = 0;
1878 	while (entry) {
1879 		char *author, *eol, *msg, *msg0;
1880 		wchar_t *wauthor, *wmsg;
1881 		int width;
1882 		if (ncommits >= limit - 1)
1883 			break;
1884 		author = strdup(got_object_commit_get_author(entry->commit));
1885 		if (author == NULL) {
1886 			err = got_error_from_errno("strdup");
1887 			goto done;
1888 		}
1889 		err = format_author(&wauthor, &width, author, COLS,
1890 		    date_display_cols);
1891 		if (author_cols < width)
1892 			author_cols = width;
1893 		free(wauthor);
1894 		free(author);
1895 		err = got_object_commit_get_logmsg(&msg0, entry->commit);
1896 		if (err)
1897 			goto done;
1898 		msg = msg0;
1899 		while (*msg == '\n')
1900 			++msg;
1901 		if ((eol = strchr(msg, '\n')))
1902 			*eol = '\0';
1903 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
1904 		    date_display_cols + author_cols, 0);
1905 		if (err)
1906 			goto done;
1907 		view->maxx = MAX(view->maxx, width);
1908 		free(msg0);
1909 		free(wmsg);
1910 		ncommits++;
1911 		entry = TAILQ_NEXT(entry, entry);
1912 	}
1913 
1914 	entry = s->first_displayed_entry;
1915 	s->last_displayed_entry = s->first_displayed_entry;
1916 	ncommits = 0;
1917 	while (entry) {
1918 		if (ncommits >= limit - 1)
1919 			break;
1920 		if (ncommits == s->selected)
1921 			wstandout(view->window);
1922 		err = draw_commit(view, entry->commit, entry->id,
1923 		    date_display_cols, author_cols);
1924 		if (ncommits == s->selected)
1925 			wstandend(view->window);
1926 		if (err)
1927 			goto done;
1928 		ncommits++;
1929 		s->last_displayed_entry = entry;
1930 		entry = TAILQ_NEXT(entry, entry);
1931 	}
1932 
1933 	view_vborder(view);
1934 done:
1935 	free(id_str);
1936 	free(refs_str);
1937 	free(ncommits_str);
1938 	free(header);
1939 	return err;
1940 }
1941 
1942 static void
1943 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1944 {
1945 	struct commit_queue_entry *entry;
1946 	int nscrolled = 0;
1947 
1948 	entry = TAILQ_FIRST(&s->commits.head);
1949 	if (s->first_displayed_entry == entry)
1950 		return;
1951 
1952 	entry = s->first_displayed_entry;
1953 	while (entry && nscrolled < maxscroll) {
1954 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1955 		if (entry) {
1956 			s->first_displayed_entry = entry;
1957 			nscrolled++;
1958 		}
1959 	}
1960 }
1961 
1962 static const struct got_error *
1963 trigger_log_thread(struct tog_view *view, int wait)
1964 {
1965 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1966 	int errcode;
1967 
1968 	halfdelay(1); /* fast refresh while loading commits */
1969 
1970 	while (ta->commits_needed > 0 || ta->load_all) {
1971 		if (ta->log_complete)
1972 			break;
1973 
1974 		/* Wake the log thread. */
1975 		errcode = pthread_cond_signal(&ta->need_commits);
1976 		if (errcode)
1977 			return got_error_set_errno(errcode,
1978 			    "pthread_cond_signal");
1979 
1980 		/*
1981 		 * The mutex will be released while the view loop waits
1982 		 * in wgetch(), at which time the log thread will run.
1983 		 */
1984 		if (!wait)
1985 			break;
1986 
1987 		/* Display progress update in log view. */
1988 		show_log_view(view);
1989 		update_panels();
1990 		doupdate();
1991 
1992 		/* Wait right here while next commit is being loaded. */
1993 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1994 		if (errcode)
1995 			return got_error_set_errno(errcode,
1996 			    "pthread_cond_wait");
1997 
1998 		/* Display progress update in log view. */
1999 		show_log_view(view);
2000 		update_panels();
2001 		doupdate();
2002 	}
2003 
2004 	return NULL;
2005 }
2006 
2007 static const struct got_error *
2008 log_scroll_down(struct tog_view *view, int maxscroll)
2009 {
2010 	struct tog_log_view_state *s = &view->state.log;
2011 	const struct got_error *err = NULL;
2012 	struct commit_queue_entry *pentry;
2013 	int nscrolled = 0, ncommits_needed;
2014 
2015 	if (s->last_displayed_entry == NULL)
2016 		return NULL;
2017 
2018 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
2019 	if (s->commits.ncommits < ncommits_needed &&
2020 	    !s->thread_args.log_complete) {
2021 		/*
2022 		 * Ask the log thread for required amount of commits.
2023 		 */
2024 		s->thread_args.commits_needed += maxscroll;
2025 		err = trigger_log_thread(view, 1);
2026 		if (err)
2027 			return err;
2028 	}
2029 
2030 	do {
2031 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
2032 		if (pentry == NULL)
2033 			break;
2034 
2035 		s->last_displayed_entry = pentry;
2036 
2037 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
2038 		if (pentry == NULL)
2039 			break;
2040 		s->first_displayed_entry = pentry;
2041 	} while (++nscrolled < maxscroll);
2042 
2043 	return err;
2044 }
2045 
2046 static const struct got_error *
2047 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
2048     struct got_commit_object *commit, struct got_object_id *commit_id,
2049     struct tog_view *log_view, struct got_repository *repo)
2050 {
2051 	const struct got_error *err;
2052 	struct got_object_qid *parent_id;
2053 	struct tog_view *diff_view;
2054 
2055 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
2056 	if (diff_view == NULL)
2057 		return got_error_from_errno("view_open");
2058 
2059 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2060 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2061 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2062 	if (err == NULL)
2063 		*new_view = diff_view;
2064 	return err;
2065 }
2066 
2067 static const struct got_error *
2068 tree_view_visit_subtree(struct tog_tree_view_state *s,
2069     struct got_tree_object *subtree)
2070 {
2071 	struct tog_parent_tree *parent;
2072 
2073 	parent = calloc(1, sizeof(*parent));
2074 	if (parent == NULL)
2075 		return got_error_from_errno("calloc");
2076 
2077 	parent->tree = s->tree;
2078 	parent->first_displayed_entry = s->first_displayed_entry;
2079 	parent->selected_entry = s->selected_entry;
2080 	parent->selected = s->selected;
2081 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2082 	s->tree = subtree;
2083 	s->selected = 0;
2084 	s->first_displayed_entry = NULL;
2085 	return NULL;
2086 }
2087 
2088 static const struct got_error *
2089 tree_view_walk_path(struct tog_tree_view_state *s,
2090     struct got_commit_object *commit, const char *path)
2091 {
2092 	const struct got_error *err = NULL;
2093 	struct got_tree_object *tree = NULL;
2094 	const char *p;
2095 	char *slash, *subpath = NULL;
2096 
2097 	/* Walk the path and open corresponding tree objects. */
2098 	p = path;
2099 	while (*p) {
2100 		struct got_tree_entry *te;
2101 		struct got_object_id *tree_id;
2102 		char *te_name;
2103 
2104 		while (p[0] == '/')
2105 			p++;
2106 
2107 		/* Ensure the correct subtree entry is selected. */
2108 		slash = strchr(p, '/');
2109 		if (slash == NULL)
2110 			te_name = strdup(p);
2111 		else
2112 			te_name = strndup(p, slash - p);
2113 		if (te_name == NULL) {
2114 			err = got_error_from_errno("strndup");
2115 			break;
2116 		}
2117 		te = got_object_tree_find_entry(s->tree, te_name);
2118 		if (te == NULL) {
2119 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2120 			free(te_name);
2121 			break;
2122 		}
2123 		free(te_name);
2124 		s->first_displayed_entry = s->selected_entry = te;
2125 
2126 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2127 			break; /* jump to this file's entry */
2128 
2129 		slash = strchr(p, '/');
2130 		if (slash)
2131 			subpath = strndup(path, slash - path);
2132 		else
2133 			subpath = strdup(path);
2134 		if (subpath == NULL) {
2135 			err = got_error_from_errno("strdup");
2136 			break;
2137 		}
2138 
2139 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2140 		    subpath);
2141 		if (err)
2142 			break;
2143 
2144 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2145 		free(tree_id);
2146 		if (err)
2147 			break;
2148 
2149 		err = tree_view_visit_subtree(s, tree);
2150 		if (err) {
2151 			got_object_tree_close(tree);
2152 			break;
2153 		}
2154 		if (slash == NULL)
2155 			break;
2156 		free(subpath);
2157 		subpath = NULL;
2158 		p = slash;
2159 	}
2160 
2161 	free(subpath);
2162 	return err;
2163 }
2164 
2165 static const struct got_error *
2166 browse_commit_tree(struct tog_view **new_view, int begin_x,
2167     struct commit_queue_entry *entry, const char *path,
2168     const char *head_ref_name, struct got_repository *repo)
2169 {
2170 	const struct got_error *err = NULL;
2171 	struct tog_tree_view_state *s;
2172 	struct tog_view *tree_view;
2173 
2174 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
2175 	if (tree_view == NULL)
2176 		return got_error_from_errno("view_open");
2177 
2178 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2179 	if (err)
2180 		return err;
2181 	s = &tree_view->state.tree;
2182 
2183 	*new_view = tree_view;
2184 
2185 	if (got_path_is_root_dir(path))
2186 		return NULL;
2187 
2188 	return tree_view_walk_path(s, entry->commit, path);
2189 }
2190 
2191 static const struct got_error *
2192 block_signals_used_by_main_thread(void)
2193 {
2194 	sigset_t sigset;
2195 	int errcode;
2196 
2197 	if (sigemptyset(&sigset) == -1)
2198 		return got_error_from_errno("sigemptyset");
2199 
2200 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2201 	if (sigaddset(&sigset, SIGWINCH) == -1)
2202 		return got_error_from_errno("sigaddset");
2203 	if (sigaddset(&sigset, SIGCONT) == -1)
2204 		return got_error_from_errno("sigaddset");
2205 	if (sigaddset(&sigset, SIGINT) == -1)
2206 		return got_error_from_errno("sigaddset");
2207 	if (sigaddset(&sigset, SIGTERM) == -1)
2208 		return got_error_from_errno("sigaddset");
2209 
2210 	/* ncurses handles SIGTSTP */
2211 	if (sigaddset(&sigset, SIGTSTP) == -1)
2212 		return got_error_from_errno("sigaddset");
2213 
2214 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2215 	if (errcode)
2216 		return got_error_set_errno(errcode, "pthread_sigmask");
2217 
2218 	return NULL;
2219 }
2220 
2221 static void *
2222 log_thread(void *arg)
2223 {
2224 	const struct got_error *err = NULL;
2225 	int errcode = 0;
2226 	struct tog_log_thread_args *a = arg;
2227 	int done = 0;
2228 
2229 	err = block_signals_used_by_main_thread();
2230 	if (err)
2231 		return (void *)err;
2232 
2233 	while (!done && !err && !tog_fatal_signal_received()) {
2234 		err = queue_commits(a);
2235 		if (err) {
2236 			if (err->code != GOT_ERR_ITER_COMPLETED)
2237 				return (void *)err;
2238 			err = NULL;
2239 			done = 1;
2240 		} else if (a->commits_needed > 0 && !a->load_all)
2241 			a->commits_needed--;
2242 
2243 		errcode = pthread_mutex_lock(&tog_mutex);
2244 		if (errcode) {
2245 			err = got_error_set_errno(errcode,
2246 			    "pthread_mutex_lock");
2247 			break;
2248 		} else if (*a->quit)
2249 			done = 1;
2250 		else if (*a->first_displayed_entry == NULL) {
2251 			*a->first_displayed_entry =
2252 			    TAILQ_FIRST(&a->commits->head);
2253 			*a->selected_entry = *a->first_displayed_entry;
2254 		}
2255 
2256 		errcode = pthread_cond_signal(&a->commit_loaded);
2257 		if (errcode) {
2258 			err = got_error_set_errno(errcode,
2259 			    "pthread_cond_signal");
2260 			pthread_mutex_unlock(&tog_mutex);
2261 			break;
2262 		}
2263 
2264 		if (done)
2265 			a->commits_needed = 0;
2266 		else {
2267 			if (a->commits_needed == 0 && !a->load_all) {
2268 				errcode = pthread_cond_wait(&a->need_commits,
2269 				    &tog_mutex);
2270 				if (errcode)
2271 					err = got_error_set_errno(errcode,
2272 					    "pthread_cond_wait");
2273 				if (*a->quit)
2274 					done = 1;
2275 			}
2276 		}
2277 
2278 		errcode = pthread_mutex_unlock(&tog_mutex);
2279 		if (errcode && err == NULL)
2280 			err = got_error_set_errno(errcode,
2281 			    "pthread_mutex_unlock");
2282 	}
2283 	a->log_complete = 1;
2284 	return (void *)err;
2285 }
2286 
2287 static const struct got_error *
2288 stop_log_thread(struct tog_log_view_state *s)
2289 {
2290 	const struct got_error *err = NULL;
2291 	int errcode;
2292 
2293 	if (s->thread) {
2294 		s->quit = 1;
2295 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2296 		if (errcode)
2297 			return got_error_set_errno(errcode,
2298 			    "pthread_cond_signal");
2299 		errcode = pthread_mutex_unlock(&tog_mutex);
2300 		if (errcode)
2301 			return got_error_set_errno(errcode,
2302 			    "pthread_mutex_unlock");
2303 		errcode = pthread_join(s->thread, (void **)&err);
2304 		if (errcode)
2305 			return got_error_set_errno(errcode, "pthread_join");
2306 		errcode = pthread_mutex_lock(&tog_mutex);
2307 		if (errcode)
2308 			return got_error_set_errno(errcode,
2309 			    "pthread_mutex_lock");
2310 		s->thread = NULL;
2311 	}
2312 
2313 	if (s->thread_args.repo) {
2314 		err = got_repo_close(s->thread_args.repo);
2315 		s->thread_args.repo = NULL;
2316 	}
2317 
2318 	if (s->thread_args.pack_fds) {
2319 		const struct got_error *pack_err =
2320 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2321 		if (err == NULL)
2322 			err = pack_err;
2323 		s->thread_args.pack_fds = NULL;
2324 	}
2325 
2326 	if (s->thread_args.graph) {
2327 		got_commit_graph_close(s->thread_args.graph);
2328 		s->thread_args.graph = NULL;
2329 	}
2330 
2331 	return err;
2332 }
2333 
2334 static const struct got_error *
2335 close_log_view(struct tog_view *view)
2336 {
2337 	const struct got_error *err = NULL;
2338 	struct tog_log_view_state *s = &view->state.log;
2339 	int errcode;
2340 
2341 	err = stop_log_thread(s);
2342 
2343 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2344 	if (errcode && err == NULL)
2345 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2346 
2347 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2348 	if (errcode && err == NULL)
2349 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2350 
2351 	free_commits(&s->commits);
2352 	free(s->in_repo_path);
2353 	s->in_repo_path = NULL;
2354 	free(s->start_id);
2355 	s->start_id = NULL;
2356 	free(s->head_ref_name);
2357 	s->head_ref_name = NULL;
2358 	return err;
2359 }
2360 
2361 static const struct got_error *
2362 search_start_log_view(struct tog_view *view)
2363 {
2364 	struct tog_log_view_state *s = &view->state.log;
2365 
2366 	s->matched_entry = NULL;
2367 	s->search_entry = NULL;
2368 	return NULL;
2369 }
2370 
2371 static const struct got_error *
2372 search_next_log_view(struct tog_view *view)
2373 {
2374 	const struct got_error *err = NULL;
2375 	struct tog_log_view_state *s = &view->state.log;
2376 	struct commit_queue_entry *entry;
2377 
2378 	/* Display progress update in log view. */
2379 	show_log_view(view);
2380 	update_panels();
2381 	doupdate();
2382 
2383 	if (s->search_entry) {
2384 		int errcode, ch;
2385 		errcode = pthread_mutex_unlock(&tog_mutex);
2386 		if (errcode)
2387 			return got_error_set_errno(errcode,
2388 			    "pthread_mutex_unlock");
2389 		ch = wgetch(view->window);
2390 		errcode = pthread_mutex_lock(&tog_mutex);
2391 		if (errcode)
2392 			return got_error_set_errno(errcode,
2393 			    "pthread_mutex_lock");
2394 		if (ch == KEY_BACKSPACE) {
2395 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2396 			return NULL;
2397 		}
2398 		if (view->searching == TOG_SEARCH_FORWARD)
2399 			entry = TAILQ_NEXT(s->search_entry, entry);
2400 		else
2401 			entry = TAILQ_PREV(s->search_entry,
2402 			    commit_queue_head, entry);
2403 	} else if (s->matched_entry) {
2404 		int matched_idx = s->matched_entry->idx;
2405 		int selected_idx = s->selected_entry->idx;
2406 
2407 		/*
2408 		 * If the user has moved the cursor after we hit a match,
2409 		 * the position from where we should continue searching
2410 		 * might have changed.
2411 		 */
2412 		if (view->searching == TOG_SEARCH_FORWARD) {
2413 			if (matched_idx > selected_idx)
2414 				entry = TAILQ_NEXT(s->selected_entry, entry);
2415 			else
2416 				entry = TAILQ_NEXT(s->matched_entry, entry);
2417 		} else {
2418 			if (matched_idx < selected_idx)
2419 				entry = TAILQ_PREV(s->selected_entry,
2420 						commit_queue_head, entry);
2421 			else
2422 				entry = TAILQ_PREV(s->matched_entry,
2423 						commit_queue_head, entry);
2424 		}
2425 	} else {
2426 		entry = s->selected_entry;
2427 	}
2428 
2429 	while (1) {
2430 		int have_match = 0;
2431 
2432 		if (entry == NULL) {
2433 			if (s->thread_args.log_complete ||
2434 			    view->searching == TOG_SEARCH_BACKWARD) {
2435 				view->search_next_done =
2436 				    (s->matched_entry == NULL ?
2437 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2438 				s->search_entry = NULL;
2439 				return NULL;
2440 			}
2441 			/*
2442 			 * Poke the log thread for more commits and return,
2443 			 * allowing the main loop to make progress. Search
2444 			 * will resume at s->search_entry once we come back.
2445 			 */
2446 			s->thread_args.commits_needed++;
2447 			return trigger_log_thread(view, 0);
2448 		}
2449 
2450 		err = match_commit(&have_match, entry->id, entry->commit,
2451 		    &view->regex);
2452 		if (err)
2453 			break;
2454 		if (have_match) {
2455 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2456 			s->matched_entry = entry;
2457 			break;
2458 		}
2459 
2460 		s->search_entry = entry;
2461 		if (view->searching == TOG_SEARCH_FORWARD)
2462 			entry = TAILQ_NEXT(entry, entry);
2463 		else
2464 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2465 	}
2466 
2467 	if (s->matched_entry) {
2468 		int cur = s->selected_entry->idx;
2469 		while (cur < s->matched_entry->idx) {
2470 			err = input_log_view(NULL, view, KEY_DOWN);
2471 			if (err)
2472 				return err;
2473 			cur++;
2474 		}
2475 		while (cur > s->matched_entry->idx) {
2476 			err = input_log_view(NULL, view, KEY_UP);
2477 			if (err)
2478 				return err;
2479 			cur--;
2480 		}
2481 	}
2482 
2483 	s->search_entry = NULL;
2484 
2485 	return NULL;
2486 }
2487 
2488 static const struct got_error *
2489 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2490     struct got_repository *repo, const char *head_ref_name,
2491     const char *in_repo_path, int log_branches)
2492 {
2493 	const struct got_error *err = NULL;
2494 	struct tog_log_view_state *s = &view->state.log;
2495 	struct got_repository *thread_repo = NULL;
2496 	struct got_commit_graph *thread_graph = NULL;
2497 	int errcode;
2498 
2499 	if (in_repo_path != s->in_repo_path) {
2500 		free(s->in_repo_path);
2501 		s->in_repo_path = strdup(in_repo_path);
2502 		if (s->in_repo_path == NULL)
2503 			return got_error_from_errno("strdup");
2504 	}
2505 
2506 	/* The commit queue only contains commits being displayed. */
2507 	TAILQ_INIT(&s->commits.head);
2508 	s->commits.ncommits = 0;
2509 
2510 	s->repo = repo;
2511 	if (head_ref_name) {
2512 		s->head_ref_name = strdup(head_ref_name);
2513 		if (s->head_ref_name == NULL) {
2514 			err = got_error_from_errno("strdup");
2515 			goto done;
2516 		}
2517 	}
2518 	s->start_id = got_object_id_dup(start_id);
2519 	if (s->start_id == NULL) {
2520 		err = got_error_from_errno("got_object_id_dup");
2521 		goto done;
2522 	}
2523 	s->log_branches = log_branches;
2524 
2525 	STAILQ_INIT(&s->colors);
2526 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2527 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2528 		    get_color_value("TOG_COLOR_COMMIT"));
2529 		if (err)
2530 			goto done;
2531 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2532 		    get_color_value("TOG_COLOR_AUTHOR"));
2533 		if (err) {
2534 			free_colors(&s->colors);
2535 			goto done;
2536 		}
2537 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2538 		    get_color_value("TOG_COLOR_DATE"));
2539 		if (err) {
2540 			free_colors(&s->colors);
2541 			goto done;
2542 		}
2543 	}
2544 
2545 	view->show = show_log_view;
2546 	view->input = input_log_view;
2547 	view->close = close_log_view;
2548 	view->search_start = search_start_log_view;
2549 	view->search_next = search_next_log_view;
2550 
2551 	if (s->thread_args.pack_fds == NULL) {
2552 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2553 		if (err)
2554 			goto done;
2555 	}
2556 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2557 	    s->thread_args.pack_fds);
2558 	if (err)
2559 		goto done;
2560 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2561 	    !s->log_branches);
2562 	if (err)
2563 		goto done;
2564 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2565 	    s->repo, NULL, NULL);
2566 	if (err)
2567 		goto done;
2568 
2569 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2570 	if (errcode) {
2571 		err = got_error_set_errno(errcode, "pthread_cond_init");
2572 		goto done;
2573 	}
2574 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2575 	if (errcode) {
2576 		err = got_error_set_errno(errcode, "pthread_cond_init");
2577 		goto done;
2578 	}
2579 
2580 	s->thread_args.commits_needed = view->nlines;
2581 	s->thread_args.graph = thread_graph;
2582 	s->thread_args.commits = &s->commits;
2583 	s->thread_args.in_repo_path = s->in_repo_path;
2584 	s->thread_args.start_id = s->start_id;
2585 	s->thread_args.repo = thread_repo;
2586 	s->thread_args.log_complete = 0;
2587 	s->thread_args.quit = &s->quit;
2588 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2589 	s->thread_args.selected_entry = &s->selected_entry;
2590 	s->thread_args.searching = &view->searching;
2591 	s->thread_args.search_next_done = &view->search_next_done;
2592 	s->thread_args.regex = &view->regex;
2593 done:
2594 	if (err)
2595 		close_log_view(view);
2596 	return err;
2597 }
2598 
2599 static const struct got_error *
2600 show_log_view(struct tog_view *view)
2601 {
2602 	const struct got_error *err;
2603 	struct tog_log_view_state *s = &view->state.log;
2604 
2605 	if (s->thread == NULL) {
2606 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2607 		    &s->thread_args);
2608 		if (errcode)
2609 			return got_error_set_errno(errcode, "pthread_create");
2610 		if (s->thread_args.commits_needed > 0) {
2611 			err = trigger_log_thread(view, 1);
2612 			if (err)
2613 				return err;
2614 		}
2615 	}
2616 
2617 	return draw_commits(view);
2618 }
2619 
2620 static const struct got_error *
2621 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2622 {
2623 	const struct got_error *err = NULL;
2624 	struct tog_log_view_state *s = &view->state.log;
2625 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2626 	struct tog_view *ref_view = NULL;
2627 	struct commit_queue_entry *entry;
2628 	int begin_x = 0, n, nscroll = view->nlines - 1;
2629 
2630 	if (s->thread_args.load_all) {
2631 		if (ch == KEY_BACKSPACE)
2632 			s->thread_args.load_all = 0;
2633 		else if (s->thread_args.log_complete) {
2634 			s->thread_args.load_all = 0;
2635 			log_scroll_down(view, s->commits.ncommits);
2636 			s->selected = MIN(view->nlines - 2,
2637 			    s->commits.ncommits - 1);
2638 			select_commit(s);
2639 		}
2640 		return NULL;
2641 	}
2642 
2643 	switch (ch) {
2644 	case 'q':
2645 		s->quit = 1;
2646 		break;
2647 	case '0':
2648 		view->x = 0;
2649 		break;
2650 	case '$':
2651 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2652 		view->count = 0;
2653 		break;
2654 	case KEY_RIGHT:
2655 	case 'l':
2656 		if (view->x + view->ncols / 2 < view->maxx)
2657 			view->x += 2;  /* move two columns right */
2658 		else
2659 			view->count = 0;
2660 		break;
2661 	case KEY_LEFT:
2662 	case 'h':
2663 		view->x -= MIN(view->x, 2);  /* move two columns back */
2664 		if (view->x <= 0)
2665 			view->count = 0;
2666 		break;
2667 	case 'k':
2668 	case KEY_UP:
2669 	case '<':
2670 	case ',':
2671 	case CTRL('p'):
2672 		if (s->selected_entry->idx == 0)
2673 			view->count = 0;
2674 		if (s->first_displayed_entry == NULL)
2675 			break;
2676 		if (s->selected > 0)
2677 			s->selected--;
2678 		else
2679 			log_scroll_up(s, 1);
2680 		select_commit(s);
2681 		break;
2682 	case 'g':
2683 	case KEY_HOME:
2684 		s->selected = 0;
2685 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2686 		select_commit(s);
2687 		view->count = 0;
2688 		break;
2689 	case CTRL('u'):
2690 	case 'u':
2691 		nscroll /= 2;
2692 		/* FALL THROUGH */
2693 	case KEY_PPAGE:
2694 	case CTRL('b'):
2695 	case 'b':
2696 		if (s->first_displayed_entry == NULL)
2697 			break;
2698 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2699 			s->selected = MAX(0, s->selected - nscroll - 1);
2700 		else
2701 			log_scroll_up(s, nscroll);
2702 		select_commit(s);
2703 		if (s->selected_entry->idx == 0)
2704 			view->count = 0;
2705 		break;
2706 	case 'j':
2707 	case KEY_DOWN:
2708 	case '>':
2709 	case '.':
2710 	case CTRL('n'):
2711 		if (s->first_displayed_entry == NULL)
2712 			break;
2713 		if (s->selected < MIN(view->nlines - 2,
2714 		    s->commits.ncommits - 1))
2715 			s->selected++;
2716 		else {
2717 			err = log_scroll_down(view, 1);
2718 			if (err)
2719 				break;
2720 		}
2721 		select_commit(s);
2722 		if (s->thread_args.log_complete &&
2723 		    s->selected_entry->idx == s->commits.ncommits - 1)
2724 			view->count = 0;
2725 		break;
2726 	case 'G':
2727 	case KEY_END: {
2728 		/* We don't know yet how many commits, so we're forced to
2729 		 * traverse them all. */
2730 		view->count = 0;
2731 		if (!s->thread_args.log_complete) {
2732 			s->thread_args.load_all = 1;
2733 			return trigger_log_thread(view, 0);
2734 		}
2735 
2736 		s->selected = 0;
2737 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2738 		for (n = 0; n < view->nlines - 1; n++) {
2739 			if (entry == NULL)
2740 				break;
2741 			s->first_displayed_entry = entry;
2742 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2743 		}
2744 		if (n > 0)
2745 			s->selected = n - 1;
2746 		select_commit(s);
2747 		break;
2748 	}
2749 	case CTRL('d'):
2750 	case 'd':
2751 		nscroll /= 2;
2752 		/* FALL THROUGH */
2753 	case KEY_NPAGE:
2754 	case CTRL('f'):
2755 	case 'f':
2756 	case ' ': {
2757 		struct commit_queue_entry *first;
2758 		first = s->first_displayed_entry;
2759 		if (first == NULL) {
2760 			view->count = 0;
2761 			break;
2762 		}
2763 		err = log_scroll_down(view, nscroll);
2764 		if (err)
2765 			break;
2766 		if (first == s->first_displayed_entry &&
2767 		    s->selected < MIN(view->nlines - 2,
2768 		    s->commits.ncommits - 1)) {
2769 			/* can't scroll further down */
2770 			s->selected += MIN(s->last_displayed_entry->idx -
2771 			    s->selected_entry->idx, nscroll + 1);
2772 		}
2773 		select_commit(s);
2774 		if (s->thread_args.log_complete &&
2775 		    s->selected_entry->idx == s->commits.ncommits - 1)
2776 			view->count = 0;
2777 		break;
2778 	}
2779 	case KEY_RESIZE:
2780 		if (s->selected > view->nlines - 2)
2781 			s->selected = view->nlines - 2;
2782 		if (s->selected > s->commits.ncommits - 1)
2783 			s->selected = s->commits.ncommits - 1;
2784 		select_commit(s);
2785 		if (s->commits.ncommits < view->nlines - 1 &&
2786 		    !s->thread_args.log_complete) {
2787 			s->thread_args.commits_needed += (view->nlines - 1) -
2788 			    s->commits.ncommits;
2789 			err = trigger_log_thread(view, 1);
2790 		}
2791 		break;
2792 	case KEY_ENTER:
2793 	case '\r':
2794 		view->count = 0;
2795 		if (s->selected_entry == NULL)
2796 			break;
2797 		if (view_is_parent_view(view))
2798 			begin_x = view_split_begin_x(view->begin_x);
2799 		err = open_diff_view_for_commit(&diff_view, begin_x,
2800 		    s->selected_entry->commit, s->selected_entry->id,
2801 		    view, s->repo);
2802 		if (err)
2803 			break;
2804 		view->focussed = 0;
2805 		diff_view->focussed = 1;
2806 		if (view_is_parent_view(view)) {
2807 			err = view_close_child(view);
2808 			if (err)
2809 				return err;
2810 			err = view_set_child(view, diff_view);
2811 			if (err)
2812 				return err;
2813 			view->focus_child = 1;
2814 		} else
2815 			*new_view = diff_view;
2816 		break;
2817 	case 't':
2818 		view->count = 0;
2819 		if (s->selected_entry == NULL)
2820 			break;
2821 		if (view_is_parent_view(view))
2822 			begin_x = view_split_begin_x(view->begin_x);
2823 		err = browse_commit_tree(&tree_view, begin_x,
2824 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2825 		    s->repo);
2826 		if (err)
2827 			break;
2828 		view->focussed = 0;
2829 		tree_view->focussed = 1;
2830 		if (view_is_parent_view(view)) {
2831 			err = view_close_child(view);
2832 			if (err)
2833 				return err;
2834 			err = view_set_child(view, tree_view);
2835 			if (err)
2836 				return err;
2837 			view->focus_child = 1;
2838 		} else
2839 			*new_view = tree_view;
2840 		break;
2841 	case KEY_BACKSPACE:
2842 	case CTRL('l'):
2843 	case 'B':
2844 		view->count = 0;
2845 		if (ch == KEY_BACKSPACE &&
2846 		    got_path_is_root_dir(s->in_repo_path))
2847 			break;
2848 		err = stop_log_thread(s);
2849 		if (err)
2850 			return err;
2851 		if (ch == KEY_BACKSPACE) {
2852 			char *parent_path;
2853 			err = got_path_dirname(&parent_path, s->in_repo_path);
2854 			if (err)
2855 				return err;
2856 			free(s->in_repo_path);
2857 			s->in_repo_path = parent_path;
2858 			s->thread_args.in_repo_path = s->in_repo_path;
2859 		} else if (ch == CTRL('l')) {
2860 			struct got_object_id *start_id;
2861 			err = got_repo_match_object_id(&start_id, NULL,
2862 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2863 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2864 			if (err)
2865 				return err;
2866 			free(s->start_id);
2867 			s->start_id = start_id;
2868 			s->thread_args.start_id = s->start_id;
2869 		} else /* 'B' */
2870 			s->log_branches = !s->log_branches;
2871 
2872 		if (s->thread_args.pack_fds == NULL) {
2873 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2874 			if (err)
2875 				return err;
2876 		}
2877 		err = got_repo_open(&s->thread_args.repo,
2878 		    got_repo_get_path(s->repo), NULL,
2879 		    s->thread_args.pack_fds);
2880 		if (err)
2881 			return err;
2882 		tog_free_refs();
2883 		err = tog_load_refs(s->repo, 0);
2884 		if (err)
2885 			return err;
2886 		err = got_commit_graph_open(&s->thread_args.graph,
2887 		    s->in_repo_path, !s->log_branches);
2888 		if (err)
2889 			return err;
2890 		err = got_commit_graph_iter_start(s->thread_args.graph,
2891 		    s->start_id, s->repo, NULL, NULL);
2892 		if (err)
2893 			return err;
2894 		free_commits(&s->commits);
2895 		s->first_displayed_entry = NULL;
2896 		s->last_displayed_entry = NULL;
2897 		s->selected_entry = NULL;
2898 		s->selected = 0;
2899 		s->thread_args.log_complete = 0;
2900 		s->quit = 0;
2901 		s->thread_args.commits_needed = view->nlines;
2902 		s->matched_entry = NULL;
2903 		s->search_entry = NULL;
2904 		break;
2905 	case 'r':
2906 		view->count = 0;
2907 		if (view_is_parent_view(view))
2908 			begin_x = view_split_begin_x(view->begin_x);
2909 		ref_view = view_open(view->nlines, view->ncols,
2910 		    view->begin_y, begin_x, TOG_VIEW_REF);
2911 		if (ref_view == NULL)
2912 			return got_error_from_errno("view_open");
2913 		err = open_ref_view(ref_view, s->repo);
2914 		if (err) {
2915 			view_close(ref_view);
2916 			return err;
2917 		}
2918 		view->focussed = 0;
2919 		ref_view->focussed = 1;
2920 		if (view_is_parent_view(view)) {
2921 			err = view_close_child(view);
2922 			if (err)
2923 				return err;
2924 			err = view_set_child(view, ref_view);
2925 			if (err)
2926 				return err;
2927 			view->focus_child = 1;
2928 		} else
2929 			*new_view = ref_view;
2930 		break;
2931 	default:
2932 		view->count = 0;
2933 		break;
2934 	}
2935 
2936 	return err;
2937 }
2938 
2939 static const struct got_error *
2940 apply_unveil(const char *repo_path, const char *worktree_path)
2941 {
2942 	const struct got_error *error;
2943 
2944 #ifdef PROFILE
2945 	if (unveil("gmon.out", "rwc") != 0)
2946 		return got_error_from_errno2("unveil", "gmon.out");
2947 #endif
2948 	if (repo_path && unveil(repo_path, "r") != 0)
2949 		return got_error_from_errno2("unveil", repo_path);
2950 
2951 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2952 		return got_error_from_errno2("unveil", worktree_path);
2953 
2954 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2955 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2956 
2957 	error = got_privsep_unveil_exec_helpers();
2958 	if (error != NULL)
2959 		return error;
2960 
2961 	if (unveil(NULL, NULL) != 0)
2962 		return got_error_from_errno("unveil");
2963 
2964 	return NULL;
2965 }
2966 
2967 static void
2968 init_curses(void)
2969 {
2970 	/*
2971 	 * Override default signal handlers before starting ncurses.
2972 	 * This should prevent ncurses from installing its own
2973 	 * broken cleanup() signal handler.
2974 	 */
2975 	signal(SIGWINCH, tog_sigwinch);
2976 	signal(SIGPIPE, tog_sigpipe);
2977 	signal(SIGCONT, tog_sigcont);
2978 	signal(SIGINT, tog_sigint);
2979 	signal(SIGTERM, tog_sigterm);
2980 
2981 	initscr();
2982 	cbreak();
2983 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2984 	noecho();
2985 	nonl();
2986 	intrflush(stdscr, FALSE);
2987 	keypad(stdscr, TRUE);
2988 	curs_set(0);
2989 	if (getenv("TOG_COLORS") != NULL) {
2990 		start_color();
2991 		use_default_colors();
2992 	}
2993 }
2994 
2995 static const struct got_error *
2996 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2997     struct got_repository *repo, struct got_worktree *worktree)
2998 {
2999 	const struct got_error *err = NULL;
3000 
3001 	if (argc == 0) {
3002 		*in_repo_path = strdup("/");
3003 		if (*in_repo_path == NULL)
3004 			return got_error_from_errno("strdup");
3005 		return NULL;
3006 	}
3007 
3008 	if (worktree) {
3009 		const char *prefix = got_worktree_get_path_prefix(worktree);
3010 		char *p;
3011 
3012 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3013 		if (err)
3014 			return err;
3015 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3016 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3017 		    p) == -1) {
3018 			err = got_error_from_errno("asprintf");
3019 			*in_repo_path = NULL;
3020 		}
3021 		free(p);
3022 	} else
3023 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3024 
3025 	return err;
3026 }
3027 
3028 static const struct got_error *
3029 cmd_log(int argc, char *argv[])
3030 {
3031 	const struct got_error *error;
3032 	struct got_repository *repo = NULL;
3033 	struct got_worktree *worktree = NULL;
3034 	struct got_object_id *start_id = NULL;
3035 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3036 	char *start_commit = NULL, *label = NULL;
3037 	struct got_reference *ref = NULL;
3038 	const char *head_ref_name = NULL;
3039 	int ch, log_branches = 0;
3040 	struct tog_view *view;
3041 	int *pack_fds = NULL;
3042 
3043 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3044 		switch (ch) {
3045 		case 'b':
3046 			log_branches = 1;
3047 			break;
3048 		case 'c':
3049 			start_commit = optarg;
3050 			break;
3051 		case 'r':
3052 			repo_path = realpath(optarg, NULL);
3053 			if (repo_path == NULL)
3054 				return got_error_from_errno2("realpath",
3055 				    optarg);
3056 			break;
3057 		default:
3058 			usage_log();
3059 			/* NOTREACHED */
3060 		}
3061 	}
3062 
3063 	argc -= optind;
3064 	argv += optind;
3065 
3066 	if (argc > 1)
3067 		usage_log();
3068 
3069 	error = got_repo_pack_fds_open(&pack_fds);
3070 	if (error != NULL)
3071 		goto done;
3072 
3073 	if (repo_path == NULL) {
3074 		cwd = getcwd(NULL, 0);
3075 		if (cwd == NULL)
3076 			return got_error_from_errno("getcwd");
3077 		error = got_worktree_open(&worktree, cwd);
3078 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3079 			goto done;
3080 		if (worktree)
3081 			repo_path =
3082 			    strdup(got_worktree_get_repo_path(worktree));
3083 		else
3084 			repo_path = strdup(cwd);
3085 		if (repo_path == NULL) {
3086 			error = got_error_from_errno("strdup");
3087 			goto done;
3088 		}
3089 	}
3090 
3091 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3092 	if (error != NULL)
3093 		goto done;
3094 
3095 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3096 	    repo, worktree);
3097 	if (error)
3098 		goto done;
3099 
3100 	init_curses();
3101 
3102 	error = apply_unveil(got_repo_get_path(repo),
3103 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3104 	if (error)
3105 		goto done;
3106 
3107 	/* already loaded by tog_log_with_path()? */
3108 	if (TAILQ_EMPTY(&tog_refs)) {
3109 		error = tog_load_refs(repo, 0);
3110 		if (error)
3111 			goto done;
3112 	}
3113 
3114 	if (start_commit == NULL) {
3115 		error = got_repo_match_object_id(&start_id, &label,
3116 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3117 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3118 		if (error)
3119 			goto done;
3120 		head_ref_name = label;
3121 	} else {
3122 		error = got_ref_open(&ref, repo, start_commit, 0);
3123 		if (error == NULL)
3124 			head_ref_name = got_ref_get_name(ref);
3125 		else if (error->code != GOT_ERR_NOT_REF)
3126 			goto done;
3127 		error = got_repo_match_object_id(&start_id, NULL,
3128 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3129 		if (error)
3130 			goto done;
3131 	}
3132 
3133 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3134 	if (view == NULL) {
3135 		error = got_error_from_errno("view_open");
3136 		goto done;
3137 	}
3138 	error = open_log_view(view, start_id, repo, head_ref_name,
3139 	    in_repo_path, log_branches);
3140 	if (error)
3141 		goto done;
3142 	if (worktree) {
3143 		/* Release work tree lock. */
3144 		got_worktree_close(worktree);
3145 		worktree = NULL;
3146 	}
3147 	error = view_loop(view);
3148 done:
3149 	free(in_repo_path);
3150 	free(repo_path);
3151 	free(cwd);
3152 	free(start_id);
3153 	free(label);
3154 	if (ref)
3155 		got_ref_close(ref);
3156 	if (repo) {
3157 		const struct got_error *close_err = got_repo_close(repo);
3158 		if (error == NULL)
3159 			error = close_err;
3160 	}
3161 	if (worktree)
3162 		got_worktree_close(worktree);
3163 	if (pack_fds) {
3164 		const struct got_error *pack_err =
3165 		    got_repo_pack_fds_close(pack_fds);
3166 		if (error == NULL)
3167 			error = pack_err;
3168 	}
3169 	tog_free_refs();
3170 	return error;
3171 }
3172 
3173 __dead static void
3174 usage_diff(void)
3175 {
3176 	endwin();
3177 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3178 	    "[-w] object1 object2\n", getprogname());
3179 	exit(1);
3180 }
3181 
3182 static int
3183 match_line(const char *line, regex_t *regex, size_t nmatch,
3184     regmatch_t *regmatch)
3185 {
3186 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3187 }
3188 
3189 static struct tog_color *
3190 match_color(struct tog_colors *colors, const char *line)
3191 {
3192 	struct tog_color *tc = NULL;
3193 
3194 	STAILQ_FOREACH(tc, colors, entry) {
3195 		if (match_line(line, &tc->regex, 0, NULL))
3196 			return tc;
3197 	}
3198 
3199 	return NULL;
3200 }
3201 
3202 static const struct got_error *
3203 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3204     WINDOW *window, int skipcol, regmatch_t *regmatch)
3205 {
3206 	const struct got_error *err = NULL;
3207 	char *exstr = NULL;
3208 	wchar_t *wline = NULL;
3209 	int rme, rms, n, width, scrollx;
3210 	int width0 = 0, width1 = 0, width2 = 0;
3211 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3212 
3213 	*wtotal = 0;
3214 
3215 	rms = regmatch->rm_so;
3216 	rme = regmatch->rm_eo;
3217 
3218 	err = expand_tab(&exstr, line);
3219 	if (err)
3220 		return err;
3221 
3222 	/* Split the line into 3 segments, according to match offsets. */
3223 	seg0 = strndup(exstr, rms);
3224 	if (seg0 == NULL) {
3225 		err = got_error_from_errno("strndup");
3226 		goto done;
3227 	}
3228 	seg1 = strndup(exstr + rms, rme - rms);
3229 	if (seg1 == NULL) {
3230 		err = got_error_from_errno("strndup");
3231 		goto done;
3232 	}
3233 	seg2 = strdup(exstr + rme);
3234 	if (seg2 == NULL) {
3235 		err = got_error_from_errno("strndup");
3236 		goto done;
3237 	}
3238 
3239 	/* draw up to matched token if we haven't scrolled past it */
3240 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3241 	    col_tab_align, 1);
3242 	if (err)
3243 		goto done;
3244 	n = MAX(width0 - skipcol, 0);
3245 	if (n) {
3246 		free(wline);
3247 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3248 		    wlimit, col_tab_align, 1);
3249 		if (err)
3250 			goto done;
3251 		waddwstr(window, &wline[scrollx]);
3252 		wlimit -= width;
3253 		*wtotal += width;
3254 	}
3255 
3256 	if (wlimit > 0) {
3257 		int i = 0, w = 0;
3258 		size_t wlen;
3259 
3260 		free(wline);
3261 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3262 		    col_tab_align, 1);
3263 		if (err)
3264 			goto done;
3265 		wlen = wcslen(wline);
3266 		while (i < wlen) {
3267 			width = wcwidth(wline[i]);
3268 			if (width == -1) {
3269 				/* should not happen, tabs are expanded */
3270 				err = got_error(GOT_ERR_RANGE);
3271 				goto done;
3272 			}
3273 			if (width0 + w + width > skipcol)
3274 				break;
3275 			w += width;
3276 			i++;
3277 		}
3278 		/* draw (visible part of) matched token (if scrolled into it) */
3279 		if (width1 - w > 0) {
3280 			wattron(window, A_STANDOUT);
3281 			waddwstr(window, &wline[i]);
3282 			wattroff(window, A_STANDOUT);
3283 			wlimit -= (width1 - w);
3284 			*wtotal += (width1 - w);
3285 		}
3286 	}
3287 
3288 	if (wlimit > 0) {  /* draw rest of line */
3289 		free(wline);
3290 		if (skipcol > width0 + width1) {
3291 			err = format_line(&wline, &width2, &scrollx, seg2,
3292 			    skipcol - (width0 + width1), wlimit,
3293 			    col_tab_align, 1);
3294 			if (err)
3295 				goto done;
3296 			waddwstr(window, &wline[scrollx]);
3297 		} else {
3298 			err = format_line(&wline, &width2, NULL, seg2, 0,
3299 			    wlimit, col_tab_align, 1);
3300 			if (err)
3301 				goto done;
3302 			waddwstr(window, wline);
3303 		}
3304 		*wtotal += width2;
3305 	}
3306 done:
3307 	free(wline);
3308 	free(exstr);
3309 	free(seg0);
3310 	free(seg1);
3311 	free(seg2);
3312 	return err;
3313 }
3314 
3315 static const struct got_error *
3316 draw_file(struct tog_view *view, const char *header)
3317 {
3318 	struct tog_diff_view_state *s = &view->state.diff;
3319 	regmatch_t *regmatch = &view->regmatch;
3320 	const struct got_error *err;
3321 	int nprinted = 0;
3322 	char *line;
3323 	size_t linesize = 0;
3324 	ssize_t linelen;
3325 	struct tog_color *tc;
3326 	wchar_t *wline;
3327 	int width;
3328 	int max_lines = view->nlines;
3329 	int nlines = s->nlines;
3330 	off_t line_offset;
3331 
3332 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3333 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3334 		return got_error_from_errno("fseek");
3335 
3336 	werase(view->window);
3337 
3338 	if (header) {
3339 		if (asprintf(&line, "[%d/%d] %s",
3340 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3341 		    header) == -1)
3342 			return got_error_from_errno("asprintf");
3343 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3344 		    0, 0);
3345 		free(line);
3346 		if (err)
3347 			return err;
3348 
3349 		if (view_needs_focus_indication(view))
3350 			wstandout(view->window);
3351 		waddwstr(view->window, wline);
3352 		free(wline);
3353 		wline = NULL;
3354 		if (view_needs_focus_indication(view))
3355 			wstandend(view->window);
3356 		if (width <= view->ncols - 1)
3357 			waddch(view->window, '\n');
3358 
3359 		if (max_lines <= 1)
3360 			return NULL;
3361 		max_lines--;
3362 	}
3363 
3364 	s->eof = 0;
3365 	view->maxx = 0;
3366 	line = NULL;
3367 	while (max_lines > 0 && nprinted < max_lines) {
3368 		linelen = getline(&line, &linesize, s->f);
3369 		if (linelen == -1) {
3370 			if (feof(s->f)) {
3371 				s->eof = 1;
3372 				break;
3373 			}
3374 			free(line);
3375 			return got_ferror(s->f, GOT_ERR_IO);
3376 		}
3377 
3378 		/* Set view->maxx based on full line length. */
3379 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3380 		    view->x ? 1 : 0);
3381 		if (err) {
3382 			free(line);
3383 			return err;
3384 		}
3385 		view->maxx = MAX(view->maxx, width);
3386 		free(wline);
3387 		wline = NULL;
3388 
3389 		tc = match_color(&s->colors, line);
3390 		if (tc)
3391 			wattr_on(view->window,
3392 			    COLOR_PAIR(tc->colorpair), NULL);
3393 		if (s->first_displayed_line + nprinted == s->matched_line &&
3394 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3395 			err = add_matched_line(&width, line, view->ncols, 0,
3396 			    view->window, view->x, regmatch);
3397 			if (err) {
3398 				free(line);
3399 				return err;
3400 			}
3401 		} else {
3402 			int skip;
3403 			err = format_line(&wline, &width, &skip, line,
3404 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3405 			if (err) {
3406 				free(line);
3407 				return err;
3408 			}
3409 			waddwstr(view->window, &wline[skip]);
3410 			free(wline);
3411 			wline = NULL;
3412 		}
3413 		if (tc)
3414 			wattr_off(view->window,
3415 			    COLOR_PAIR(tc->colorpair), NULL);
3416 		if (width <= view->ncols - 1)
3417 			waddch(view->window, '\n');
3418 		nprinted++;
3419 	}
3420 	free(line);
3421 	if (nprinted >= 1)
3422 		s->last_displayed_line = s->first_displayed_line +
3423 		    (nprinted - 1);
3424 	else
3425 		s->last_displayed_line = s->first_displayed_line;
3426 
3427 	view_vborder(view);
3428 
3429 	if (s->eof) {
3430 		while (nprinted < view->nlines) {
3431 			waddch(view->window, '\n');
3432 			nprinted++;
3433 		}
3434 
3435 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3436 		    view->ncols, 0, 0);
3437 		if (err) {
3438 			return err;
3439 		}
3440 
3441 		wstandout(view->window);
3442 		waddwstr(view->window, wline);
3443 		free(wline);
3444 		wline = NULL;
3445 		wstandend(view->window);
3446 	}
3447 
3448 	return NULL;
3449 }
3450 
3451 static char *
3452 get_datestr(time_t *time, char *datebuf)
3453 {
3454 	struct tm mytm, *tm;
3455 	char *p, *s;
3456 
3457 	tm = gmtime_r(time, &mytm);
3458 	if (tm == NULL)
3459 		return NULL;
3460 	s = asctime_r(tm, datebuf);
3461 	if (s == NULL)
3462 		return NULL;
3463 	p = strchr(s, '\n');
3464 	if (p)
3465 		*p = '\0';
3466 	return s;
3467 }
3468 
3469 static const struct got_error *
3470 get_changed_paths(struct got_pathlist_head *paths,
3471     struct got_commit_object *commit, struct got_repository *repo)
3472 {
3473 	const struct got_error *err = NULL;
3474 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3475 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3476 	struct got_object_qid *qid;
3477 
3478 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3479 	if (qid != NULL) {
3480 		struct got_commit_object *pcommit;
3481 		err = got_object_open_as_commit(&pcommit, repo,
3482 		    &qid->id);
3483 		if (err)
3484 			return err;
3485 
3486 		tree_id1 = got_object_id_dup(
3487 		    got_object_commit_get_tree_id(pcommit));
3488 		if (tree_id1 == NULL) {
3489 			got_object_commit_close(pcommit);
3490 			return got_error_from_errno("got_object_id_dup");
3491 		}
3492 		got_object_commit_close(pcommit);
3493 
3494 	}
3495 
3496 	if (tree_id1) {
3497 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3498 		if (err)
3499 			goto done;
3500 	}
3501 
3502 	tree_id2 = got_object_commit_get_tree_id(commit);
3503 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3504 	if (err)
3505 		goto done;
3506 
3507 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3508 	    got_diff_tree_collect_changed_paths, paths, 0);
3509 done:
3510 	if (tree1)
3511 		got_object_tree_close(tree1);
3512 	if (tree2)
3513 		got_object_tree_close(tree2);
3514 	free(tree_id1);
3515 	return err;
3516 }
3517 
3518 static const struct got_error *
3519 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3520 {
3521 	off_t *p;
3522 
3523 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3524 	if (p == NULL)
3525 		return got_error_from_errno("reallocarray");
3526 	*line_offsets = p;
3527 	(*line_offsets)[*nlines] = off;
3528 	(*nlines)++;
3529 	return NULL;
3530 }
3531 
3532 static const struct got_error *
3533 write_commit_info(off_t **line_offsets, size_t *nlines,
3534     struct got_object_id *commit_id, struct got_reflist_head *refs,
3535     struct got_repository *repo, FILE *outfile)
3536 {
3537 	const struct got_error *err = NULL;
3538 	char datebuf[26], *datestr;
3539 	struct got_commit_object *commit;
3540 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3541 	time_t committer_time;
3542 	const char *author, *committer;
3543 	char *refs_str = NULL;
3544 	struct got_pathlist_head changed_paths;
3545 	struct got_pathlist_entry *pe;
3546 	off_t outoff = 0;
3547 	int n;
3548 
3549 	TAILQ_INIT(&changed_paths);
3550 
3551 	if (refs) {
3552 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3553 		if (err)
3554 			return err;
3555 	}
3556 
3557 	err = got_object_open_as_commit(&commit, repo, commit_id);
3558 	if (err)
3559 		return err;
3560 
3561 	err = got_object_id_str(&id_str, commit_id);
3562 	if (err) {
3563 		err = got_error_from_errno("got_object_id_str");
3564 		goto done;
3565 	}
3566 
3567 	err = add_line_offset(line_offsets, nlines, 0);
3568 	if (err)
3569 		goto done;
3570 
3571 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3572 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3573 	if (n < 0) {
3574 		err = got_error_from_errno("fprintf");
3575 		goto done;
3576 	}
3577 	outoff += n;
3578 	err = add_line_offset(line_offsets, nlines, outoff);
3579 	if (err)
3580 		goto done;
3581 
3582 	n = fprintf(outfile, "from: %s\n",
3583 	    got_object_commit_get_author(commit));
3584 	if (n < 0) {
3585 		err = got_error_from_errno("fprintf");
3586 		goto done;
3587 	}
3588 	outoff += n;
3589 	err = add_line_offset(line_offsets, nlines, outoff);
3590 	if (err)
3591 		goto done;
3592 
3593 	committer_time = got_object_commit_get_committer_time(commit);
3594 	datestr = get_datestr(&committer_time, datebuf);
3595 	if (datestr) {
3596 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3597 		if (n < 0) {
3598 			err = got_error_from_errno("fprintf");
3599 			goto done;
3600 		}
3601 		outoff += n;
3602 		err = add_line_offset(line_offsets, nlines, outoff);
3603 		if (err)
3604 			goto done;
3605 	}
3606 	author = got_object_commit_get_author(commit);
3607 	committer = got_object_commit_get_committer(commit);
3608 	if (strcmp(author, committer) != 0) {
3609 		n = fprintf(outfile, "via: %s\n", committer);
3610 		if (n < 0) {
3611 			err = got_error_from_errno("fprintf");
3612 			goto done;
3613 		}
3614 		outoff += n;
3615 		err = add_line_offset(line_offsets, nlines, outoff);
3616 		if (err)
3617 			goto done;
3618 	}
3619 	if (got_object_commit_get_nparents(commit) > 1) {
3620 		const struct got_object_id_queue *parent_ids;
3621 		struct got_object_qid *qid;
3622 		int pn = 1;
3623 		parent_ids = got_object_commit_get_parent_ids(commit);
3624 		STAILQ_FOREACH(qid, parent_ids, entry) {
3625 			err = got_object_id_str(&id_str, &qid->id);
3626 			if (err)
3627 				goto done;
3628 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3629 			if (n < 0) {
3630 				err = got_error_from_errno("fprintf");
3631 				goto done;
3632 			}
3633 			outoff += n;
3634 			err = add_line_offset(line_offsets, nlines, outoff);
3635 			if (err)
3636 				goto done;
3637 			free(id_str);
3638 			id_str = NULL;
3639 		}
3640 	}
3641 
3642 	err = got_object_commit_get_logmsg(&logmsg, commit);
3643 	if (err)
3644 		goto done;
3645 	s = logmsg;
3646 	while ((line = strsep(&s, "\n")) != NULL) {
3647 		n = fprintf(outfile, "%s\n", line);
3648 		if (n < 0) {
3649 			err = got_error_from_errno("fprintf");
3650 			goto done;
3651 		}
3652 		outoff += n;
3653 		err = add_line_offset(line_offsets, nlines, outoff);
3654 		if (err)
3655 			goto done;
3656 	}
3657 
3658 	err = get_changed_paths(&changed_paths, commit, repo);
3659 	if (err)
3660 		goto done;
3661 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3662 		struct got_diff_changed_path *cp = pe->data;
3663 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3664 		if (n < 0) {
3665 			err = got_error_from_errno("fprintf");
3666 			goto done;
3667 		}
3668 		outoff += n;
3669 		err = add_line_offset(line_offsets, nlines, outoff);
3670 		if (err)
3671 			goto done;
3672 		free((char *)pe->path);
3673 		free(pe->data);
3674 	}
3675 
3676 	fputc('\n', outfile);
3677 	outoff++;
3678 	err = add_line_offset(line_offsets, nlines, outoff);
3679 done:
3680 	got_pathlist_free(&changed_paths);
3681 	free(id_str);
3682 	free(logmsg);
3683 	free(refs_str);
3684 	got_object_commit_close(commit);
3685 	if (err) {
3686 		free(*line_offsets);
3687 		*line_offsets = NULL;
3688 		*nlines = 0;
3689 	}
3690 	return err;
3691 }
3692 
3693 static const struct got_error *
3694 create_diff(struct tog_diff_view_state *s)
3695 {
3696 	const struct got_error *err = NULL;
3697 	FILE *f = NULL;
3698 	int obj_type;
3699 
3700 	free(s->line_offsets);
3701 	s->line_offsets = malloc(sizeof(off_t));
3702 	if (s->line_offsets == NULL)
3703 		return got_error_from_errno("malloc");
3704 	s->nlines = 0;
3705 
3706 	f = got_opentemp();
3707 	if (f == NULL) {
3708 		err = got_error_from_errno("got_opentemp");
3709 		goto done;
3710 	}
3711 	if (s->f && fclose(s->f) == EOF) {
3712 		err = got_error_from_errno("fclose");
3713 		goto done;
3714 	}
3715 	s->f = f;
3716 
3717 	if (s->id1)
3718 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3719 	else
3720 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3721 	if (err)
3722 		goto done;
3723 
3724 	switch (obj_type) {
3725 	case GOT_OBJ_TYPE_BLOB:
3726 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3727 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3728 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3729 		    s->repo, s->f);
3730 		break;
3731 	case GOT_OBJ_TYPE_TREE:
3732 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3733 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3734 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3735 		break;
3736 	case GOT_OBJ_TYPE_COMMIT: {
3737 		const struct got_object_id_queue *parent_ids;
3738 		struct got_object_qid *pid;
3739 		struct got_commit_object *commit2;
3740 		struct got_reflist_head *refs;
3741 
3742 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3743 		if (err)
3744 			goto done;
3745 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3746 		/* Show commit info if we're diffing to a parent/root commit. */
3747 		if (s->id1 == NULL) {
3748 			err = write_commit_info(&s->line_offsets, &s->nlines,
3749 			    s->id2, refs, s->repo, s->f);
3750 			if (err)
3751 				goto done;
3752 		} else {
3753 			parent_ids = got_object_commit_get_parent_ids(commit2);
3754 			STAILQ_FOREACH(pid, parent_ids, entry) {
3755 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3756 					err = write_commit_info(
3757 					    &s->line_offsets, &s->nlines,
3758 					    s->id2, refs, s->repo, s->f);
3759 					if (err)
3760 						goto done;
3761 					break;
3762 				}
3763 			}
3764 		}
3765 		got_object_commit_close(commit2);
3766 
3767 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3768 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3769 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3770 		break;
3771 	}
3772 	default:
3773 		err = got_error(GOT_ERR_OBJ_TYPE);
3774 		break;
3775 	}
3776 	if (err)
3777 		goto done;
3778 done:
3779 	if (s->f && fflush(s->f) != 0 && err == NULL)
3780 		err = got_error_from_errno("fflush");
3781 	return err;
3782 }
3783 
3784 static void
3785 diff_view_indicate_progress(struct tog_view *view)
3786 {
3787 	mvwaddstr(view->window, 0, 0, "diffing...");
3788 	update_panels();
3789 	doupdate();
3790 }
3791 
3792 static const struct got_error *
3793 search_start_diff_view(struct tog_view *view)
3794 {
3795 	struct tog_diff_view_state *s = &view->state.diff;
3796 
3797 	s->matched_line = 0;
3798 	return NULL;
3799 }
3800 
3801 static const struct got_error *
3802 search_next_diff_view(struct tog_view *view)
3803 {
3804 	struct tog_diff_view_state *s = &view->state.diff;
3805 	const struct got_error *err = NULL;
3806 	int lineno;
3807 	char *line = NULL;
3808 	size_t linesize = 0;
3809 	ssize_t linelen;
3810 
3811 	if (!view->searching) {
3812 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3813 		return NULL;
3814 	}
3815 
3816 	if (s->matched_line) {
3817 		if (view->searching == TOG_SEARCH_FORWARD)
3818 			lineno = s->matched_line + 1;
3819 		else
3820 			lineno = s->matched_line - 1;
3821 	} else
3822 		lineno = s->first_displayed_line;
3823 
3824 	while (1) {
3825 		off_t offset;
3826 
3827 		if (lineno <= 0 || lineno > s->nlines) {
3828 			if (s->matched_line == 0) {
3829 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3830 				break;
3831 			}
3832 
3833 			if (view->searching == TOG_SEARCH_FORWARD)
3834 				lineno = 1;
3835 			else
3836 				lineno = s->nlines;
3837 		}
3838 
3839 		offset = s->line_offsets[lineno - 1];
3840 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3841 			free(line);
3842 			return got_error_from_errno("fseeko");
3843 		}
3844 		linelen = getline(&line, &linesize, s->f);
3845 		if (linelen != -1) {
3846 			char *exstr;
3847 			err = expand_tab(&exstr, line);
3848 			if (err)
3849 				break;
3850 			if (match_line(exstr, &view->regex, 1,
3851 			    &view->regmatch)) {
3852 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3853 				s->matched_line = lineno;
3854 				free(exstr);
3855 				break;
3856 			}
3857 			free(exstr);
3858 		}
3859 		if (view->searching == TOG_SEARCH_FORWARD)
3860 			lineno++;
3861 		else
3862 			lineno--;
3863 	}
3864 	free(line);
3865 
3866 	if (s->matched_line) {
3867 		s->first_displayed_line = s->matched_line;
3868 		s->selected_line = 1;
3869 	}
3870 
3871 	return err;
3872 }
3873 
3874 static const struct got_error *
3875 close_diff_view(struct tog_view *view)
3876 {
3877 	const struct got_error *err = NULL;
3878 	struct tog_diff_view_state *s = &view->state.diff;
3879 
3880 	free(s->id1);
3881 	s->id1 = NULL;
3882 	free(s->id2);
3883 	s->id2 = NULL;
3884 	if (s->f && fclose(s->f) == EOF)
3885 		err = got_error_from_errno("fclose");
3886 	s->f = NULL;
3887 	if (s->f1 && fclose(s->f1) == EOF)
3888 		err = got_error_from_errno("fclose");
3889 	s->f1 = NULL;
3890 	if (s->f2 && fclose(s->f2) == EOF)
3891 		err = got_error_from_errno("fclose");
3892 	s->f2 = NULL;
3893 	free_colors(&s->colors);
3894 	free(s->line_offsets);
3895 	s->line_offsets = NULL;
3896 	s->nlines = 0;
3897 	return err;
3898 }
3899 
3900 static const struct got_error *
3901 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3902     struct got_object_id *id2, const char *label1, const char *label2,
3903     int diff_context, int ignore_whitespace, int force_text_diff,
3904     struct tog_view *log_view, struct got_repository *repo)
3905 {
3906 	const struct got_error *err;
3907 	struct tog_diff_view_state *s = &view->state.diff;
3908 
3909 	memset(s, 0, sizeof(*s));
3910 
3911 	if (id1 != NULL && id2 != NULL) {
3912 	    int type1, type2;
3913 	    err = got_object_get_type(&type1, repo, id1);
3914 	    if (err)
3915 		return err;
3916 	    err = got_object_get_type(&type2, repo, id2);
3917 	    if (err)
3918 		return err;
3919 
3920 	    if (type1 != type2)
3921 		return got_error(GOT_ERR_OBJ_TYPE);
3922 	}
3923 	s->first_displayed_line = 1;
3924 	s->last_displayed_line = view->nlines;
3925 	s->selected_line = 1;
3926 	s->repo = repo;
3927 	s->id1 = id1;
3928 	s->id2 = id2;
3929 	s->label1 = label1;
3930 	s->label2 = label2;
3931 
3932 	if (id1) {
3933 		s->id1 = got_object_id_dup(id1);
3934 		if (s->id1 == NULL)
3935 			return got_error_from_errno("got_object_id_dup");
3936 	} else
3937 		s->id1 = NULL;
3938 
3939 	s->id2 = got_object_id_dup(id2);
3940 	if (s->id2 == NULL) {
3941 		err = got_error_from_errno("got_object_id_dup");
3942 		goto done;
3943 	}
3944 
3945 	s->f1 = got_opentemp();
3946 	if (s->f1 == NULL) {
3947 		err = got_error_from_errno("got_opentemp");
3948 		goto done;
3949 	}
3950 
3951 	s->f2 = got_opentemp();
3952 	if (s->f2 == NULL) {
3953 		err = got_error_from_errno("got_opentemp");
3954 		goto done;
3955 	}
3956 
3957 	s->first_displayed_line = 1;
3958 	s->last_displayed_line = view->nlines;
3959 	s->diff_context = diff_context;
3960 	s->ignore_whitespace = ignore_whitespace;
3961 	s->force_text_diff = force_text_diff;
3962 	s->log_view = log_view;
3963 	s->repo = repo;
3964 
3965 	STAILQ_INIT(&s->colors);
3966 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3967 		err = add_color(&s->colors,
3968 		    "^-", TOG_COLOR_DIFF_MINUS,
3969 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3970 		if (err)
3971 			goto done;
3972 		err = add_color(&s->colors, "^\\+",
3973 		    TOG_COLOR_DIFF_PLUS,
3974 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3975 		if (err)
3976 			goto done;
3977 		err = add_color(&s->colors,
3978 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3979 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3980 		if (err)
3981 			goto done;
3982 
3983 		err = add_color(&s->colors,
3984 		    "^(commit [0-9a-f]|parent [0-9]|"
3985 		    "(blob|file|tree|commit) [-+] |"
3986 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3987 		    get_color_value("TOG_COLOR_DIFF_META"));
3988 		if (err)
3989 			goto done;
3990 
3991 		err = add_color(&s->colors,
3992 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3993 		    get_color_value("TOG_COLOR_AUTHOR"));
3994 		if (err)
3995 			goto done;
3996 
3997 		err = add_color(&s->colors,
3998 		    "^date: ", TOG_COLOR_DATE,
3999 		    get_color_value("TOG_COLOR_DATE"));
4000 		if (err)
4001 			goto done;
4002 	}
4003 
4004 	if (log_view && view_is_splitscreen(view))
4005 		show_log_view(log_view); /* draw vborder */
4006 	diff_view_indicate_progress(view);
4007 
4008 	err = create_diff(s);
4009 
4010 	view->show = show_diff_view;
4011 	view->input = input_diff_view;
4012 	view->close = close_diff_view;
4013 	view->search_start = search_start_diff_view;
4014 	view->search_next = search_next_diff_view;
4015 done:
4016 	if (err)
4017 		close_diff_view(view);
4018 	return err;
4019 }
4020 
4021 static const struct got_error *
4022 show_diff_view(struct tog_view *view)
4023 {
4024 	const struct got_error *err;
4025 	struct tog_diff_view_state *s = &view->state.diff;
4026 	char *id_str1 = NULL, *id_str2, *header;
4027 	const char *label1, *label2;
4028 
4029 	if (s->id1) {
4030 		err = got_object_id_str(&id_str1, s->id1);
4031 		if (err)
4032 			return err;
4033 		label1 = s->label1 ? : id_str1;
4034 	} else
4035 		label1 = "/dev/null";
4036 
4037 	err = got_object_id_str(&id_str2, s->id2);
4038 	if (err)
4039 		return err;
4040 	label2 = s->label2 ? : id_str2;
4041 
4042 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4043 		err = got_error_from_errno("asprintf");
4044 		free(id_str1);
4045 		free(id_str2);
4046 		return err;
4047 	}
4048 	free(id_str1);
4049 	free(id_str2);
4050 
4051 	err = draw_file(view, header);
4052 	free(header);
4053 	return err;
4054 }
4055 
4056 static const struct got_error *
4057 set_selected_commit(struct tog_diff_view_state *s,
4058     struct commit_queue_entry *entry)
4059 {
4060 	const struct got_error *err;
4061 	const struct got_object_id_queue *parent_ids;
4062 	struct got_commit_object *selected_commit;
4063 	struct got_object_qid *pid;
4064 
4065 	free(s->id2);
4066 	s->id2 = got_object_id_dup(entry->id);
4067 	if (s->id2 == NULL)
4068 		return got_error_from_errno("got_object_id_dup");
4069 
4070 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4071 	if (err)
4072 		return err;
4073 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4074 	free(s->id1);
4075 	pid = STAILQ_FIRST(parent_ids);
4076 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4077 	got_object_commit_close(selected_commit);
4078 	return NULL;
4079 }
4080 
4081 static const struct got_error *
4082 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4083 {
4084 	const struct got_error *err = NULL;
4085 	struct tog_diff_view_state *s = &view->state.diff;
4086 	struct tog_log_view_state *ls;
4087 	struct commit_queue_entry *old_selected_entry;
4088 	char *line = NULL;
4089 	size_t linesize = 0;
4090 	ssize_t linelen;
4091 	int i, nscroll = view->nlines - 1;
4092 
4093 	switch (ch) {
4094 	case '0':
4095 		view->x = 0;
4096 		break;
4097 	case '$':
4098 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4099 		view->count = 0;
4100 		break;
4101 	case KEY_RIGHT:
4102 	case 'l':
4103 		if (view->x + view->ncols / 3 < view->maxx)
4104 			view->x += 2;  /* move two columns right */
4105 		else
4106 			view->count = 0;
4107 		break;
4108 	case KEY_LEFT:
4109 	case 'h':
4110 		view->x -= MIN(view->x, 2);  /* move two columns back */
4111 		if (view->x <= 0)
4112 			view->count = 0;
4113 		break;
4114 	case 'a':
4115 	case 'w':
4116 		if (ch == 'a')
4117 			s->force_text_diff = !s->force_text_diff;
4118 		if (ch == 'w')
4119 			s->ignore_whitespace = !s->ignore_whitespace;
4120 		wclear(view->window);
4121 		s->first_displayed_line = 1;
4122 		s->last_displayed_line = view->nlines;
4123 		s->matched_line = 0;
4124 		diff_view_indicate_progress(view);
4125 		err = create_diff(s);
4126 		view->count = 0;
4127 		break;
4128 	case 'g':
4129 	case KEY_HOME:
4130 		s->first_displayed_line = 1;
4131 		view->count = 0;
4132 		break;
4133 	case 'G':
4134 	case KEY_END:
4135 		view->count = 0;
4136 		if (s->eof)
4137 			break;
4138 
4139 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4140 		s->eof = 1;
4141 		break;
4142 	case 'k':
4143 	case KEY_UP:
4144 	case CTRL('p'):
4145 		if (s->first_displayed_line > 1)
4146 			s->first_displayed_line--;
4147 		else
4148 			view->count = 0;
4149 		break;
4150 	case CTRL('u'):
4151 	case 'u':
4152 		nscroll /= 2;
4153 		/* FALL THROUGH */
4154 	case KEY_PPAGE:
4155 	case CTRL('b'):
4156 	case 'b':
4157 		if (s->first_displayed_line == 1) {
4158 			view->count = 0;
4159 			break;
4160 		}
4161 		i = 0;
4162 		while (i++ < nscroll && s->first_displayed_line > 1)
4163 			s->first_displayed_line--;
4164 		break;
4165 	case 'j':
4166 	case KEY_DOWN:
4167 	case CTRL('n'):
4168 		if (!s->eof)
4169 			s->first_displayed_line++;
4170 		else
4171 			view->count = 0;
4172 		break;
4173 	case CTRL('d'):
4174 	case 'd':
4175 		nscroll /= 2;
4176 		/* FALL THROUGH */
4177 	case KEY_NPAGE:
4178 	case CTRL('f'):
4179 	case 'f':
4180 	case ' ':
4181 		if (s->eof) {
4182 			view->count = 0;
4183 			break;
4184 		}
4185 		i = 0;
4186 		while (!s->eof && i++ < nscroll) {
4187 			linelen = getline(&line, &linesize, s->f);
4188 			s->first_displayed_line++;
4189 			if (linelen == -1) {
4190 				if (feof(s->f)) {
4191 					s->eof = 1;
4192 				} else
4193 					err = got_ferror(s->f, GOT_ERR_IO);
4194 				break;
4195 			}
4196 		}
4197 		free(line);
4198 		break;
4199 	case '[':
4200 		if (s->diff_context > 0) {
4201 			s->diff_context--;
4202 			s->matched_line = 0;
4203 			diff_view_indicate_progress(view);
4204 			err = create_diff(s);
4205 			if (s->first_displayed_line + view->nlines - 1 >
4206 			    s->nlines) {
4207 				s->first_displayed_line = 1;
4208 				s->last_displayed_line = view->nlines;
4209 			}
4210 		} else
4211 			view->count = 0;
4212 		break;
4213 	case ']':
4214 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4215 			s->diff_context++;
4216 			s->matched_line = 0;
4217 			diff_view_indicate_progress(view);
4218 			err = create_diff(s);
4219 		} else
4220 			view->count = 0;
4221 		break;
4222 	case '<':
4223 	case ',':
4224 		if (s->log_view == NULL) {
4225 			view->count = 0;
4226 			break;
4227 		}
4228 		ls = &s->log_view->state.log;
4229 		old_selected_entry = ls->selected_entry;
4230 
4231 		/* view->count handled in input_log_view() */
4232 		err = input_log_view(NULL, s->log_view, KEY_UP);
4233 		if (err)
4234 			break;
4235 
4236 		if (old_selected_entry == ls->selected_entry)
4237 			break;
4238 
4239 		err = set_selected_commit(s, ls->selected_entry);
4240 		if (err)
4241 			break;
4242 
4243 		s->first_displayed_line = 1;
4244 		s->last_displayed_line = view->nlines;
4245 		s->matched_line = 0;
4246 		view->x = 0;
4247 
4248 		diff_view_indicate_progress(view);
4249 		err = create_diff(s);
4250 		break;
4251 	case '>':
4252 	case '.':
4253 		if (s->log_view == NULL) {
4254 			view->count = 0;
4255 			break;
4256 		}
4257 		ls = &s->log_view->state.log;
4258 		old_selected_entry = ls->selected_entry;
4259 
4260 		/* view->count handled in input_log_view() */
4261 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4262 		if (err)
4263 			break;
4264 
4265 		if (old_selected_entry == ls->selected_entry)
4266 			break;
4267 
4268 		err = set_selected_commit(s, ls->selected_entry);
4269 		if (err)
4270 			break;
4271 
4272 		s->first_displayed_line = 1;
4273 		s->last_displayed_line = view->nlines;
4274 		s->matched_line = 0;
4275 		view->x = 0;
4276 
4277 		diff_view_indicate_progress(view);
4278 		err = create_diff(s);
4279 		break;
4280 	default:
4281 		view->count = 0;
4282 		break;
4283 	}
4284 
4285 	return err;
4286 }
4287 
4288 static const struct got_error *
4289 cmd_diff(int argc, char *argv[])
4290 {
4291 	const struct got_error *error = NULL;
4292 	struct got_repository *repo = NULL;
4293 	struct got_worktree *worktree = NULL;
4294 	struct got_object_id *id1 = NULL, *id2 = NULL;
4295 	char *repo_path = NULL, *cwd = NULL;
4296 	char *id_str1 = NULL, *id_str2 = NULL;
4297 	char *label1 = NULL, *label2 = NULL;
4298 	int diff_context = 3, ignore_whitespace = 0;
4299 	int ch, force_text_diff = 0;
4300 	const char *errstr;
4301 	struct tog_view *view;
4302 	int *pack_fds = NULL;
4303 
4304 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4305 		switch (ch) {
4306 		case 'a':
4307 			force_text_diff = 1;
4308 			break;
4309 		case 'C':
4310 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4311 			    &errstr);
4312 			if (errstr != NULL)
4313 				errx(1, "number of context lines is %s: %s",
4314 				    errstr, errstr);
4315 			break;
4316 		case 'r':
4317 			repo_path = realpath(optarg, NULL);
4318 			if (repo_path == NULL)
4319 				return got_error_from_errno2("realpath",
4320 				    optarg);
4321 			got_path_strip_trailing_slashes(repo_path);
4322 			break;
4323 		case 'w':
4324 			ignore_whitespace = 1;
4325 			break;
4326 		default:
4327 			usage_diff();
4328 			/* NOTREACHED */
4329 		}
4330 	}
4331 
4332 	argc -= optind;
4333 	argv += optind;
4334 
4335 	if (argc == 0) {
4336 		usage_diff(); /* TODO show local worktree changes */
4337 	} else if (argc == 2) {
4338 		id_str1 = argv[0];
4339 		id_str2 = argv[1];
4340 	} else
4341 		usage_diff();
4342 
4343 	error = got_repo_pack_fds_open(&pack_fds);
4344 	if (error)
4345 		goto done;
4346 
4347 	if (repo_path == NULL) {
4348 		cwd = getcwd(NULL, 0);
4349 		if (cwd == NULL)
4350 			return got_error_from_errno("getcwd");
4351 		error = got_worktree_open(&worktree, cwd);
4352 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4353 			goto done;
4354 		if (worktree)
4355 			repo_path =
4356 			    strdup(got_worktree_get_repo_path(worktree));
4357 		else
4358 			repo_path = strdup(cwd);
4359 		if (repo_path == NULL) {
4360 			error = got_error_from_errno("strdup");
4361 			goto done;
4362 		}
4363 	}
4364 
4365 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4366 	if (error)
4367 		goto done;
4368 
4369 	init_curses();
4370 
4371 	error = apply_unveil(got_repo_get_path(repo), NULL);
4372 	if (error)
4373 		goto done;
4374 
4375 	error = tog_load_refs(repo, 0);
4376 	if (error)
4377 		goto done;
4378 
4379 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4380 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4381 	if (error)
4382 		goto done;
4383 
4384 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4385 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4386 	if (error)
4387 		goto done;
4388 
4389 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4390 	if (view == NULL) {
4391 		error = got_error_from_errno("view_open");
4392 		goto done;
4393 	}
4394 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4395 	    ignore_whitespace, force_text_diff, NULL,  repo);
4396 	if (error)
4397 		goto done;
4398 	error = view_loop(view);
4399 done:
4400 	free(label1);
4401 	free(label2);
4402 	free(repo_path);
4403 	free(cwd);
4404 	if (repo) {
4405 		const struct got_error *close_err = got_repo_close(repo);
4406 		if (error == NULL)
4407 			error = close_err;
4408 	}
4409 	if (worktree)
4410 		got_worktree_close(worktree);
4411 	if (pack_fds) {
4412 		const struct got_error *pack_err =
4413 		    got_repo_pack_fds_close(pack_fds);
4414 		if (error == NULL)
4415 			error = pack_err;
4416 	}
4417 	tog_free_refs();
4418 	return error;
4419 }
4420 
4421 __dead static void
4422 usage_blame(void)
4423 {
4424 	endwin();
4425 	fprintf(stderr,
4426 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4427 	    getprogname());
4428 	exit(1);
4429 }
4430 
4431 struct tog_blame_line {
4432 	int annotated;
4433 	struct got_object_id *id;
4434 };
4435 
4436 static const struct got_error *
4437 draw_blame(struct tog_view *view)
4438 {
4439 	struct tog_blame_view_state *s = &view->state.blame;
4440 	struct tog_blame *blame = &s->blame;
4441 	regmatch_t *regmatch = &view->regmatch;
4442 	const struct got_error *err;
4443 	int lineno = 0, nprinted = 0;
4444 	char *line = NULL;
4445 	size_t linesize = 0;
4446 	ssize_t linelen;
4447 	wchar_t *wline;
4448 	int width;
4449 	struct tog_blame_line *blame_line;
4450 	struct got_object_id *prev_id = NULL;
4451 	char *id_str;
4452 	struct tog_color *tc;
4453 
4454 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4455 	if (err)
4456 		return err;
4457 
4458 	rewind(blame->f);
4459 	werase(view->window);
4460 
4461 	if (asprintf(&line, "commit %s", id_str) == -1) {
4462 		err = got_error_from_errno("asprintf");
4463 		free(id_str);
4464 		return err;
4465 	}
4466 
4467 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4468 	free(line);
4469 	line = NULL;
4470 	if (err)
4471 		return err;
4472 	if (view_needs_focus_indication(view))
4473 		wstandout(view->window);
4474 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4475 	if (tc)
4476 		wattr_on(view->window,
4477 		    COLOR_PAIR(tc->colorpair), NULL);
4478 	waddwstr(view->window, wline);
4479 	if (tc)
4480 		wattr_off(view->window,
4481 		    COLOR_PAIR(tc->colorpair), NULL);
4482 	if (view_needs_focus_indication(view))
4483 		wstandend(view->window);
4484 	free(wline);
4485 	wline = NULL;
4486 	if (width < view->ncols - 1)
4487 		waddch(view->window, '\n');
4488 
4489 	if (asprintf(&line, "[%d/%d] %s%s",
4490 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4491 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4492 		free(id_str);
4493 		return got_error_from_errno("asprintf");
4494 	}
4495 	free(id_str);
4496 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4497 	free(line);
4498 	line = NULL;
4499 	if (err)
4500 		return err;
4501 	waddwstr(view->window, wline);
4502 	free(wline);
4503 	wline = NULL;
4504 	if (width < view->ncols - 1)
4505 		waddch(view->window, '\n');
4506 
4507 	s->eof = 0;
4508 	view->maxx = 0;
4509 	while (nprinted < view->nlines - 2) {
4510 		linelen = getline(&line, &linesize, blame->f);
4511 		if (linelen == -1) {
4512 			if (feof(blame->f)) {
4513 				s->eof = 1;
4514 				break;
4515 			}
4516 			free(line);
4517 			return got_ferror(blame->f, GOT_ERR_IO);
4518 		}
4519 		if (++lineno < s->first_displayed_line)
4520 			continue;
4521 
4522 		/* Set view->maxx based on full line length. */
4523 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4524 		if (err) {
4525 			free(line);
4526 			return err;
4527 		}
4528 		free(wline);
4529 		wline = NULL;
4530 		view->maxx = MAX(view->maxx, width);
4531 
4532 		if (view->focussed && nprinted == s->selected_line - 1)
4533 			wstandout(view->window);
4534 
4535 		if (blame->nlines > 0) {
4536 			blame_line = &blame->lines[lineno - 1];
4537 			if (blame_line->annotated && prev_id &&
4538 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4539 			    !(view->focussed &&
4540 			    nprinted == s->selected_line - 1)) {
4541 				waddstr(view->window, "        ");
4542 			} else if (blame_line->annotated) {
4543 				char *id_str;
4544 				err = got_object_id_str(&id_str,
4545 				    blame_line->id);
4546 				if (err) {
4547 					free(line);
4548 					return err;
4549 				}
4550 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4551 				if (tc)
4552 					wattr_on(view->window,
4553 					    COLOR_PAIR(tc->colorpair), NULL);
4554 				wprintw(view->window, "%.8s", id_str);
4555 				if (tc)
4556 					wattr_off(view->window,
4557 					    COLOR_PAIR(tc->colorpair), NULL);
4558 				free(id_str);
4559 				prev_id = blame_line->id;
4560 			} else {
4561 				waddstr(view->window, "........");
4562 				prev_id = NULL;
4563 			}
4564 		} else {
4565 			waddstr(view->window, "........");
4566 			prev_id = NULL;
4567 		}
4568 
4569 		if (view->focussed && nprinted == s->selected_line - 1)
4570 			wstandend(view->window);
4571 		waddstr(view->window, " ");
4572 
4573 		if (view->ncols <= 9) {
4574 			width = 9;
4575 		} else if (s->first_displayed_line + nprinted ==
4576 		    s->matched_line &&
4577 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4578 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4579 			    view->window, view->x, regmatch);
4580 			if (err) {
4581 				free(line);
4582 				return err;
4583 			}
4584 			width += 9;
4585 		} else {
4586 			int skip;
4587 			err = format_line(&wline, &width, &skip, line,
4588 			    view->x, view->ncols - 9, 9, 1);
4589 			if (err) {
4590 				free(line);
4591 				return err;
4592 			}
4593 			waddwstr(view->window, &wline[skip]);
4594 			width += 9;
4595 			free(wline);
4596 			wline = NULL;
4597 		}
4598 
4599 		if (width <= view->ncols - 1)
4600 			waddch(view->window, '\n');
4601 		if (++nprinted == 1)
4602 			s->first_displayed_line = lineno;
4603 	}
4604 	free(line);
4605 	s->last_displayed_line = lineno;
4606 
4607 	view_vborder(view);
4608 
4609 	return NULL;
4610 }
4611 
4612 static const struct got_error *
4613 blame_cb(void *arg, int nlines, int lineno,
4614     struct got_commit_object *commit, struct got_object_id *id)
4615 {
4616 	const struct got_error *err = NULL;
4617 	struct tog_blame_cb_args *a = arg;
4618 	struct tog_blame_line *line;
4619 	int errcode;
4620 
4621 	if (nlines != a->nlines ||
4622 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4623 		return got_error(GOT_ERR_RANGE);
4624 
4625 	errcode = pthread_mutex_lock(&tog_mutex);
4626 	if (errcode)
4627 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4628 
4629 	if (*a->quit) {	/* user has quit the blame view */
4630 		err = got_error(GOT_ERR_ITER_COMPLETED);
4631 		goto done;
4632 	}
4633 
4634 	if (lineno == -1)
4635 		goto done; /* no change in this commit */
4636 
4637 	line = &a->lines[lineno - 1];
4638 	if (line->annotated)
4639 		goto done;
4640 
4641 	line->id = got_object_id_dup(id);
4642 	if (line->id == NULL) {
4643 		err = got_error_from_errno("got_object_id_dup");
4644 		goto done;
4645 	}
4646 	line->annotated = 1;
4647 done:
4648 	errcode = pthread_mutex_unlock(&tog_mutex);
4649 	if (errcode)
4650 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4651 	return err;
4652 }
4653 
4654 static void *
4655 blame_thread(void *arg)
4656 {
4657 	const struct got_error *err, *close_err;
4658 	struct tog_blame_thread_args *ta = arg;
4659 	struct tog_blame_cb_args *a = ta->cb_args;
4660 	int errcode;
4661 
4662 	err = block_signals_used_by_main_thread();
4663 	if (err)
4664 		return (void *)err;
4665 
4666 	err = got_blame(ta->path, a->commit_id, ta->repo,
4667 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4668 	if (err && err->code == GOT_ERR_CANCELLED)
4669 		err = NULL;
4670 
4671 	errcode = pthread_mutex_lock(&tog_mutex);
4672 	if (errcode)
4673 		return (void *)got_error_set_errno(errcode,
4674 		    "pthread_mutex_lock");
4675 
4676 	close_err = got_repo_close(ta->repo);
4677 	if (err == NULL)
4678 		err = close_err;
4679 	ta->repo = NULL;
4680 	*ta->complete = 1;
4681 
4682 	errcode = pthread_mutex_unlock(&tog_mutex);
4683 	if (errcode && err == NULL)
4684 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4685 
4686 	return (void *)err;
4687 }
4688 
4689 static struct got_object_id *
4690 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4691     int first_displayed_line, int selected_line)
4692 {
4693 	struct tog_blame_line *line;
4694 
4695 	if (nlines <= 0)
4696 		return NULL;
4697 
4698 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4699 	if (!line->annotated)
4700 		return NULL;
4701 
4702 	return line->id;
4703 }
4704 
4705 static const struct got_error *
4706 stop_blame(struct tog_blame *blame)
4707 {
4708 	const struct got_error *err = NULL;
4709 	int i;
4710 
4711 	if (blame->thread) {
4712 		int errcode;
4713 		errcode = pthread_mutex_unlock(&tog_mutex);
4714 		if (errcode)
4715 			return got_error_set_errno(errcode,
4716 			    "pthread_mutex_unlock");
4717 		errcode = pthread_join(blame->thread, (void **)&err);
4718 		if (errcode)
4719 			return got_error_set_errno(errcode, "pthread_join");
4720 		errcode = pthread_mutex_lock(&tog_mutex);
4721 		if (errcode)
4722 			return got_error_set_errno(errcode,
4723 			    "pthread_mutex_lock");
4724 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4725 			err = NULL;
4726 		blame->thread = NULL;
4727 	}
4728 	if (blame->thread_args.repo) {
4729 		const struct got_error *close_err;
4730 		close_err = got_repo_close(blame->thread_args.repo);
4731 		if (err == NULL)
4732 			err = close_err;
4733 		blame->thread_args.repo = NULL;
4734 	}
4735 	if (blame->f) {
4736 		if (fclose(blame->f) == EOF && err == NULL)
4737 			err = got_error_from_errno("fclose");
4738 		blame->f = NULL;
4739 	}
4740 	if (blame->lines) {
4741 		for (i = 0; i < blame->nlines; i++)
4742 			free(blame->lines[i].id);
4743 		free(blame->lines);
4744 		blame->lines = NULL;
4745 	}
4746 	free(blame->cb_args.commit_id);
4747 	blame->cb_args.commit_id = NULL;
4748 	if (blame->pack_fds) {
4749 		const struct got_error *pack_err =
4750 		    got_repo_pack_fds_close(blame->pack_fds);
4751 		if (err == NULL)
4752 			err = pack_err;
4753 		blame->pack_fds = NULL;
4754 	}
4755 	return err;
4756 }
4757 
4758 static const struct got_error *
4759 cancel_blame_view(void *arg)
4760 {
4761 	const struct got_error *err = NULL;
4762 	int *done = arg;
4763 	int errcode;
4764 
4765 	errcode = pthread_mutex_lock(&tog_mutex);
4766 	if (errcode)
4767 		return got_error_set_errno(errcode,
4768 		    "pthread_mutex_unlock");
4769 
4770 	if (*done)
4771 		err = got_error(GOT_ERR_CANCELLED);
4772 
4773 	errcode = pthread_mutex_unlock(&tog_mutex);
4774 	if (errcode)
4775 		return got_error_set_errno(errcode,
4776 		    "pthread_mutex_lock");
4777 
4778 	return err;
4779 }
4780 
4781 static const struct got_error *
4782 run_blame(struct tog_view *view)
4783 {
4784 	struct tog_blame_view_state *s = &view->state.blame;
4785 	struct tog_blame *blame = &s->blame;
4786 	const struct got_error *err = NULL;
4787 	struct got_commit_object *commit = NULL;
4788 	struct got_blob_object *blob = NULL;
4789 	struct got_repository *thread_repo = NULL;
4790 	struct got_object_id *obj_id = NULL;
4791 	int obj_type, fd = -1;
4792 	int *pack_fds = NULL;
4793 
4794 	err = got_object_open_as_commit(&commit, s->repo,
4795 	    &s->blamed_commit->id);
4796 	if (err)
4797 		return err;
4798 
4799 	fd = got_opentempfd();
4800 	if (fd == -1) {
4801 		err = got_error_from_errno("got_opentempfd");
4802 		goto done;
4803 	}
4804 
4805 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4806 	if (err)
4807 		goto done;
4808 
4809 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4810 	if (err)
4811 		goto done;
4812 
4813 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4814 		err = got_error(GOT_ERR_OBJ_TYPE);
4815 		goto done;
4816 	}
4817 
4818 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
4819 	if (err)
4820 		goto done;
4821 	blame->f = got_opentemp();
4822 	if (blame->f == NULL) {
4823 		err = got_error_from_errno("got_opentemp");
4824 		goto done;
4825 	}
4826 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4827 	    &blame->line_offsets, blame->f, blob);
4828 	if (err)
4829 		goto done;
4830 	if (blame->nlines == 0) {
4831 		s->blame_complete = 1;
4832 		goto done;
4833 	}
4834 
4835 	/* Don't include \n at EOF in the blame line count. */
4836 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4837 		blame->nlines--;
4838 
4839 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4840 	if (blame->lines == NULL) {
4841 		err = got_error_from_errno("calloc");
4842 		goto done;
4843 	}
4844 
4845 	err = got_repo_pack_fds_open(&pack_fds);
4846 	if (err)
4847 		goto done;
4848 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4849 	    pack_fds);
4850 	if (err)
4851 		goto done;
4852 
4853 	blame->pack_fds = pack_fds;
4854 	blame->cb_args.view = view;
4855 	blame->cb_args.lines = blame->lines;
4856 	blame->cb_args.nlines = blame->nlines;
4857 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4858 	if (blame->cb_args.commit_id == NULL) {
4859 		err = got_error_from_errno("got_object_id_dup");
4860 		goto done;
4861 	}
4862 	blame->cb_args.quit = &s->done;
4863 
4864 	blame->thread_args.path = s->path;
4865 	blame->thread_args.repo = thread_repo;
4866 	blame->thread_args.cb_args = &blame->cb_args;
4867 	blame->thread_args.complete = &s->blame_complete;
4868 	blame->thread_args.cancel_cb = cancel_blame_view;
4869 	blame->thread_args.cancel_arg = &s->done;
4870 	s->blame_complete = 0;
4871 
4872 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4873 		s->first_displayed_line = 1;
4874 		s->last_displayed_line = view->nlines;
4875 		s->selected_line = 1;
4876 	}
4877 	s->matched_line = 0;
4878 
4879 done:
4880 	if (commit)
4881 		got_object_commit_close(commit);
4882 	if (fd != -1 && close(fd) == -1 && err == NULL)
4883 		err = got_error_from_errno("close");
4884 	if (blob)
4885 		got_object_blob_close(blob);
4886 	free(obj_id);
4887 	if (err)
4888 		stop_blame(blame);
4889 	return err;
4890 }
4891 
4892 static const struct got_error *
4893 open_blame_view(struct tog_view *view, char *path,
4894     struct got_object_id *commit_id, struct got_repository *repo)
4895 {
4896 	const struct got_error *err = NULL;
4897 	struct tog_blame_view_state *s = &view->state.blame;
4898 
4899 	STAILQ_INIT(&s->blamed_commits);
4900 
4901 	s->path = strdup(path);
4902 	if (s->path == NULL)
4903 		return got_error_from_errno("strdup");
4904 
4905 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4906 	if (err) {
4907 		free(s->path);
4908 		return err;
4909 	}
4910 
4911 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4912 	s->first_displayed_line = 1;
4913 	s->last_displayed_line = view->nlines;
4914 	s->selected_line = 1;
4915 	s->blame_complete = 0;
4916 	s->repo = repo;
4917 	s->commit_id = commit_id;
4918 	memset(&s->blame, 0, sizeof(s->blame));
4919 
4920 	STAILQ_INIT(&s->colors);
4921 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4922 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4923 		    get_color_value("TOG_COLOR_COMMIT"));
4924 		if (err)
4925 			return err;
4926 	}
4927 
4928 	view->show = show_blame_view;
4929 	view->input = input_blame_view;
4930 	view->close = close_blame_view;
4931 	view->search_start = search_start_blame_view;
4932 	view->search_next = search_next_blame_view;
4933 
4934 	return run_blame(view);
4935 }
4936 
4937 static const struct got_error *
4938 close_blame_view(struct tog_view *view)
4939 {
4940 	const struct got_error *err = NULL;
4941 	struct tog_blame_view_state *s = &view->state.blame;
4942 
4943 	if (s->blame.thread)
4944 		err = stop_blame(&s->blame);
4945 
4946 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4947 		struct got_object_qid *blamed_commit;
4948 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4949 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4950 		got_object_qid_free(blamed_commit);
4951 	}
4952 
4953 	free(s->path);
4954 	free_colors(&s->colors);
4955 	return err;
4956 }
4957 
4958 static const struct got_error *
4959 search_start_blame_view(struct tog_view *view)
4960 {
4961 	struct tog_blame_view_state *s = &view->state.blame;
4962 
4963 	s->matched_line = 0;
4964 	return NULL;
4965 }
4966 
4967 static const struct got_error *
4968 search_next_blame_view(struct tog_view *view)
4969 {
4970 	struct tog_blame_view_state *s = &view->state.blame;
4971 	const struct got_error *err = NULL;
4972 	int lineno;
4973 	char *line = NULL;
4974 	size_t linesize = 0;
4975 	ssize_t linelen;
4976 
4977 	if (!view->searching) {
4978 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4979 		return NULL;
4980 	}
4981 
4982 	if (s->matched_line) {
4983 		if (view->searching == TOG_SEARCH_FORWARD)
4984 			lineno = s->matched_line + 1;
4985 		else
4986 			lineno = s->matched_line - 1;
4987 	} else
4988 		lineno = s->first_displayed_line - 1 + s->selected_line;
4989 
4990 	while (1) {
4991 		off_t offset;
4992 
4993 		if (lineno <= 0 || lineno > s->blame.nlines) {
4994 			if (s->matched_line == 0) {
4995 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4996 				break;
4997 			}
4998 
4999 			if (view->searching == TOG_SEARCH_FORWARD)
5000 				lineno = 1;
5001 			else
5002 				lineno = s->blame.nlines;
5003 		}
5004 
5005 		offset = s->blame.line_offsets[lineno - 1];
5006 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5007 			free(line);
5008 			return got_error_from_errno("fseeko");
5009 		}
5010 		linelen = getline(&line, &linesize, s->blame.f);
5011 		if (linelen != -1) {
5012 			char *exstr;
5013 			err = expand_tab(&exstr, line);
5014 			if (err)
5015 				break;
5016 			if (match_line(exstr, &view->regex, 1,
5017 			    &view->regmatch)) {
5018 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5019 				s->matched_line = lineno;
5020 				free(exstr);
5021 				break;
5022 			}
5023 			free(exstr);
5024 		}
5025 		if (view->searching == TOG_SEARCH_FORWARD)
5026 			lineno++;
5027 		else
5028 			lineno--;
5029 	}
5030 	free(line);
5031 
5032 	if (s->matched_line) {
5033 		s->first_displayed_line = s->matched_line;
5034 		s->selected_line = 1;
5035 	}
5036 
5037 	return err;
5038 }
5039 
5040 static const struct got_error *
5041 show_blame_view(struct tog_view *view)
5042 {
5043 	const struct got_error *err = NULL;
5044 	struct tog_blame_view_state *s = &view->state.blame;
5045 	int errcode;
5046 
5047 	if (s->blame.thread == NULL && !s->blame_complete) {
5048 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5049 		    &s->blame.thread_args);
5050 		if (errcode)
5051 			return got_error_set_errno(errcode, "pthread_create");
5052 
5053 		halfdelay(1); /* fast refresh while annotating  */
5054 	}
5055 
5056 	if (s->blame_complete)
5057 		halfdelay(10); /* disable fast refresh */
5058 
5059 	err = draw_blame(view);
5060 
5061 	view_vborder(view);
5062 	return err;
5063 }
5064 
5065 static const struct got_error *
5066 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5067 {
5068 	const struct got_error *err = NULL, *thread_err = NULL;
5069 	struct tog_view *diff_view;
5070 	struct tog_blame_view_state *s = &view->state.blame;
5071 	int begin_x = 0, nscroll = view->nlines - 2;
5072 
5073 	switch (ch) {
5074 	case '0':
5075 		view->x = 0;
5076 		break;
5077 	case '$':
5078 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5079 		view->count = 0;
5080 		break;
5081 	case KEY_RIGHT:
5082 	case 'l':
5083 		if (view->x + view->ncols / 3 < view->maxx)
5084 			view->x += 2;  /* move two columns right */
5085 		else
5086 			view->count = 0;
5087 		break;
5088 	case KEY_LEFT:
5089 	case 'h':
5090 		view->x -= MIN(view->x, 2);  /* move two columns back */
5091 		if (view->x <= 0)
5092 			view->count = 0;
5093 		break;
5094 	case 'q':
5095 		s->done = 1;
5096 		break;
5097 	case 'g':
5098 	case KEY_HOME:
5099 		s->selected_line = 1;
5100 		s->first_displayed_line = 1;
5101 		view->count = 0;
5102 		break;
5103 	case 'G':
5104 	case KEY_END:
5105 		if (s->blame.nlines < view->nlines - 2) {
5106 			s->selected_line = s->blame.nlines;
5107 			s->first_displayed_line = 1;
5108 		} else {
5109 			s->selected_line = view->nlines - 2;
5110 			s->first_displayed_line = s->blame.nlines -
5111 			    (view->nlines - 3);
5112 		}
5113 		view->count = 0;
5114 		break;
5115 	case 'k':
5116 	case KEY_UP:
5117 	case CTRL('p'):
5118 		if (s->selected_line > 1)
5119 			s->selected_line--;
5120 		else if (s->selected_line == 1 &&
5121 		    s->first_displayed_line > 1)
5122 			s->first_displayed_line--;
5123 		else
5124 			view->count = 0;
5125 		break;
5126 	case CTRL('u'):
5127 	case 'u':
5128 		nscroll /= 2;
5129 		/* FALL THROUGH */
5130 	case KEY_PPAGE:
5131 	case CTRL('b'):
5132 	case 'b':
5133 		if (s->first_displayed_line == 1) {
5134 			if (view->count > 1)
5135 				nscroll += nscroll;
5136 			s->selected_line = MAX(1, s->selected_line - nscroll);
5137 			view->count = 0;
5138 			break;
5139 		}
5140 		if (s->first_displayed_line > nscroll)
5141 			s->first_displayed_line -= nscroll;
5142 		else
5143 			s->first_displayed_line = 1;
5144 		break;
5145 	case 'j':
5146 	case KEY_DOWN:
5147 	case CTRL('n'):
5148 		if (s->selected_line < view->nlines - 2 &&
5149 		    s->first_displayed_line +
5150 		    s->selected_line <= s->blame.nlines)
5151 			s->selected_line++;
5152 		else if (s->last_displayed_line <
5153 		    s->blame.nlines)
5154 			s->first_displayed_line++;
5155 		else
5156 			view->count = 0;
5157 		break;
5158 	case 'c':
5159 	case 'p': {
5160 		struct got_object_id *id = NULL;
5161 
5162 		view->count = 0;
5163 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5164 		    s->first_displayed_line, s->selected_line);
5165 		if (id == NULL)
5166 			break;
5167 		if (ch == 'p') {
5168 			struct got_commit_object *commit, *pcommit;
5169 			struct got_object_qid *pid;
5170 			struct got_object_id *blob_id = NULL;
5171 			int obj_type;
5172 			err = got_object_open_as_commit(&commit,
5173 			    s->repo, id);
5174 			if (err)
5175 				break;
5176 			pid = STAILQ_FIRST(
5177 			    got_object_commit_get_parent_ids(commit));
5178 			if (pid == NULL) {
5179 				got_object_commit_close(commit);
5180 				break;
5181 			}
5182 			/* Check if path history ends here. */
5183 			err = got_object_open_as_commit(&pcommit,
5184 			    s->repo, &pid->id);
5185 			if (err)
5186 				break;
5187 			err = got_object_id_by_path(&blob_id, s->repo,
5188 			    pcommit, s->path);
5189 			got_object_commit_close(pcommit);
5190 			if (err) {
5191 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5192 					err = NULL;
5193 				got_object_commit_close(commit);
5194 				break;
5195 			}
5196 			err = got_object_get_type(&obj_type, s->repo,
5197 			    blob_id);
5198 			free(blob_id);
5199 			/* Can't blame non-blob type objects. */
5200 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5201 				got_object_commit_close(commit);
5202 				break;
5203 			}
5204 			err = got_object_qid_alloc(&s->blamed_commit,
5205 			    &pid->id);
5206 			got_object_commit_close(commit);
5207 		} else {
5208 			if (got_object_id_cmp(id,
5209 			    &s->blamed_commit->id) == 0)
5210 				break;
5211 			err = got_object_qid_alloc(&s->blamed_commit,
5212 			    id);
5213 		}
5214 		if (err)
5215 			break;
5216 		s->done = 1;
5217 		thread_err = stop_blame(&s->blame);
5218 		s->done = 0;
5219 		if (thread_err)
5220 			break;
5221 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5222 		    s->blamed_commit, entry);
5223 		err = run_blame(view);
5224 		if (err)
5225 			break;
5226 		break;
5227 	}
5228 	case 'C': {
5229 		struct got_object_qid *first;
5230 
5231 		view->count = 0;
5232 		first = STAILQ_FIRST(&s->blamed_commits);
5233 		if (!got_object_id_cmp(&first->id, s->commit_id))
5234 			break;
5235 		s->done = 1;
5236 		thread_err = stop_blame(&s->blame);
5237 		s->done = 0;
5238 		if (thread_err)
5239 			break;
5240 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5241 		got_object_qid_free(s->blamed_commit);
5242 		s->blamed_commit =
5243 		    STAILQ_FIRST(&s->blamed_commits);
5244 		err = run_blame(view);
5245 		if (err)
5246 			break;
5247 		break;
5248 	}
5249 	case KEY_ENTER:
5250 	case '\r': {
5251 		struct got_object_id *id = NULL;
5252 		struct got_object_qid *pid;
5253 		struct got_commit_object *commit = NULL;
5254 
5255 		view->count = 0;
5256 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5257 		    s->first_displayed_line, s->selected_line);
5258 		if (id == NULL)
5259 			break;
5260 		err = got_object_open_as_commit(&commit, s->repo, id);
5261 		if (err)
5262 			break;
5263 		pid = STAILQ_FIRST(
5264 		    got_object_commit_get_parent_ids(commit));
5265 		if (view_is_parent_view(view))
5266 		    begin_x = view_split_begin_x(view->begin_x);
5267 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5268 		if (diff_view == NULL) {
5269 			got_object_commit_close(commit);
5270 			err = got_error_from_errno("view_open");
5271 			break;
5272 		}
5273 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5274 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5275 		got_object_commit_close(commit);
5276 		if (err) {
5277 			view_close(diff_view);
5278 			break;
5279 		}
5280 		view->focussed = 0;
5281 		diff_view->focussed = 1;
5282 		if (view_is_parent_view(view)) {
5283 			err = view_close_child(view);
5284 			if (err)
5285 				break;
5286 			err = view_set_child(view, diff_view);
5287 			if (err)
5288 				break;
5289 			view->focus_child = 1;
5290 		} else
5291 			*new_view = diff_view;
5292 		if (err)
5293 			break;
5294 		break;
5295 	}
5296 	case CTRL('d'):
5297 	case 'd':
5298 		nscroll /= 2;
5299 		/* FALL THROUGH */
5300 	case KEY_NPAGE:
5301 	case CTRL('f'):
5302 	case 'f':
5303 	case ' ':
5304 		if (s->last_displayed_line >= s->blame.nlines &&
5305 		    s->selected_line >= MIN(s->blame.nlines,
5306 		    view->nlines - 2)) {
5307 			view->count = 0;
5308 			break;
5309 		}
5310 		if (s->last_displayed_line >= s->blame.nlines &&
5311 		    s->selected_line < view->nlines - 2) {
5312 			s->selected_line +=
5313 			    MIN(nscroll, s->last_displayed_line -
5314 			    s->first_displayed_line - s->selected_line + 1);
5315 		}
5316 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5317 			s->first_displayed_line += nscroll;
5318 		else
5319 			s->first_displayed_line =
5320 			    s->blame.nlines - (view->nlines - 3);
5321 		break;
5322 	case KEY_RESIZE:
5323 		if (s->selected_line > view->nlines - 2) {
5324 			s->selected_line = MIN(s->blame.nlines,
5325 			    view->nlines - 2);
5326 		}
5327 		break;
5328 	default:
5329 		view->count = 0;
5330 		break;
5331 	}
5332 	return thread_err ? thread_err : err;
5333 }
5334 
5335 static const struct got_error *
5336 cmd_blame(int argc, char *argv[])
5337 {
5338 	const struct got_error *error;
5339 	struct got_repository *repo = NULL;
5340 	struct got_worktree *worktree = NULL;
5341 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5342 	char *link_target = NULL;
5343 	struct got_object_id *commit_id = NULL;
5344 	struct got_commit_object *commit = NULL;
5345 	char *commit_id_str = NULL;
5346 	int ch;
5347 	struct tog_view *view;
5348 	int *pack_fds = NULL;
5349 
5350 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5351 		switch (ch) {
5352 		case 'c':
5353 			commit_id_str = optarg;
5354 			break;
5355 		case 'r':
5356 			repo_path = realpath(optarg, NULL);
5357 			if (repo_path == NULL)
5358 				return got_error_from_errno2("realpath",
5359 				    optarg);
5360 			break;
5361 		default:
5362 			usage_blame();
5363 			/* NOTREACHED */
5364 		}
5365 	}
5366 
5367 	argc -= optind;
5368 	argv += optind;
5369 
5370 	if (argc != 1)
5371 		usage_blame();
5372 
5373 	error = got_repo_pack_fds_open(&pack_fds);
5374 	if (error != NULL)
5375 		goto done;
5376 
5377 	if (repo_path == NULL) {
5378 		cwd = getcwd(NULL, 0);
5379 		if (cwd == NULL)
5380 			return got_error_from_errno("getcwd");
5381 		error = got_worktree_open(&worktree, cwd);
5382 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5383 			goto done;
5384 		if (worktree)
5385 			repo_path =
5386 			    strdup(got_worktree_get_repo_path(worktree));
5387 		else
5388 			repo_path = strdup(cwd);
5389 		if (repo_path == NULL) {
5390 			error = got_error_from_errno("strdup");
5391 			goto done;
5392 		}
5393 	}
5394 
5395 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5396 	if (error != NULL)
5397 		goto done;
5398 
5399 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5400 	    worktree);
5401 	if (error)
5402 		goto done;
5403 
5404 	init_curses();
5405 
5406 	error = apply_unveil(got_repo_get_path(repo), NULL);
5407 	if (error)
5408 		goto done;
5409 
5410 	error = tog_load_refs(repo, 0);
5411 	if (error)
5412 		goto done;
5413 
5414 	if (commit_id_str == NULL) {
5415 		struct got_reference *head_ref;
5416 		error = got_ref_open(&head_ref, repo, worktree ?
5417 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5418 		if (error != NULL)
5419 			goto done;
5420 		error = got_ref_resolve(&commit_id, repo, head_ref);
5421 		got_ref_close(head_ref);
5422 	} else {
5423 		error = got_repo_match_object_id(&commit_id, NULL,
5424 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5425 	}
5426 	if (error != NULL)
5427 		goto done;
5428 
5429 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5430 	if (view == NULL) {
5431 		error = got_error_from_errno("view_open");
5432 		goto done;
5433 	}
5434 
5435 	error = got_object_open_as_commit(&commit, repo, commit_id);
5436 	if (error)
5437 		goto done;
5438 
5439 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5440 	    commit, repo);
5441 	if (error)
5442 		goto done;
5443 
5444 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5445 	    commit_id, repo);
5446 	if (error)
5447 		goto done;
5448 	if (worktree) {
5449 		/* Release work tree lock. */
5450 		got_worktree_close(worktree);
5451 		worktree = NULL;
5452 	}
5453 	error = view_loop(view);
5454 done:
5455 	free(repo_path);
5456 	free(in_repo_path);
5457 	free(link_target);
5458 	free(cwd);
5459 	free(commit_id);
5460 	if (commit)
5461 		got_object_commit_close(commit);
5462 	if (worktree)
5463 		got_worktree_close(worktree);
5464 	if (repo) {
5465 		const struct got_error *close_err = got_repo_close(repo);
5466 		if (error == NULL)
5467 			error = close_err;
5468 	}
5469 	if (pack_fds) {
5470 		const struct got_error *pack_err =
5471 		    got_repo_pack_fds_close(pack_fds);
5472 		if (error == NULL)
5473 			error = pack_err;
5474 	}
5475 	tog_free_refs();
5476 	return error;
5477 }
5478 
5479 static const struct got_error *
5480 draw_tree_entries(struct tog_view *view, const char *parent_path)
5481 {
5482 	struct tog_tree_view_state *s = &view->state.tree;
5483 	const struct got_error *err = NULL;
5484 	struct got_tree_entry *te;
5485 	wchar_t *wline;
5486 	struct tog_color *tc;
5487 	int width, n, i, nentries;
5488 	int limit = view->nlines;
5489 
5490 	s->ndisplayed = 0;
5491 
5492 	werase(view->window);
5493 
5494 	if (limit == 0)
5495 		return NULL;
5496 
5497 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5498 	    0, 0);
5499 	if (err)
5500 		return err;
5501 	if (view_needs_focus_indication(view))
5502 		wstandout(view->window);
5503 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5504 	if (tc)
5505 		wattr_on(view->window,
5506 		    COLOR_PAIR(tc->colorpair), NULL);
5507 	waddwstr(view->window, wline);
5508 	if (tc)
5509 		wattr_off(view->window,
5510 		    COLOR_PAIR(tc->colorpair), NULL);
5511 	if (view_needs_focus_indication(view))
5512 		wstandend(view->window);
5513 	free(wline);
5514 	wline = NULL;
5515 	if (width < view->ncols - 1)
5516 		waddch(view->window, '\n');
5517 	if (--limit <= 0)
5518 		return NULL;
5519 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5520 	    0, 0);
5521 	if (err)
5522 		return err;
5523 	waddwstr(view->window, wline);
5524 	free(wline);
5525 	wline = NULL;
5526 	if (width < view->ncols - 1)
5527 		waddch(view->window, '\n');
5528 	if (--limit <= 0)
5529 		return NULL;
5530 	waddch(view->window, '\n');
5531 	if (--limit <= 0)
5532 		return NULL;
5533 
5534 	if (s->first_displayed_entry == NULL) {
5535 		te = got_object_tree_get_first_entry(s->tree);
5536 		if (s->selected == 0) {
5537 			if (view->focussed)
5538 				wstandout(view->window);
5539 			s->selected_entry = NULL;
5540 		}
5541 		waddstr(view->window, "  ..\n");	/* parent directory */
5542 		if (s->selected == 0 && view->focussed)
5543 			wstandend(view->window);
5544 		s->ndisplayed++;
5545 		if (--limit <= 0)
5546 			return NULL;
5547 		n = 1;
5548 	} else {
5549 		n = 0;
5550 		te = s->first_displayed_entry;
5551 	}
5552 
5553 	nentries = got_object_tree_get_nentries(s->tree);
5554 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5555 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5556 		const char *modestr = "";
5557 		mode_t mode;
5558 
5559 		te = got_object_tree_get_entry(s->tree, i);
5560 		mode = got_tree_entry_get_mode(te);
5561 
5562 		if (s->show_ids) {
5563 			err = got_object_id_str(&id_str,
5564 			    got_tree_entry_get_id(te));
5565 			if (err)
5566 				return got_error_from_errno(
5567 				    "got_object_id_str");
5568 		}
5569 		if (got_object_tree_entry_is_submodule(te))
5570 			modestr = "$";
5571 		else if (S_ISLNK(mode)) {
5572 			int i;
5573 
5574 			err = got_tree_entry_get_symlink_target(&link_target,
5575 			    te, s->repo);
5576 			if (err) {
5577 				free(id_str);
5578 				return err;
5579 			}
5580 			for (i = 0; i < strlen(link_target); i++) {
5581 				if (!isprint((unsigned char)link_target[i]))
5582 					link_target[i] = '?';
5583 			}
5584 			modestr = "@";
5585 		}
5586 		else if (S_ISDIR(mode))
5587 			modestr = "/";
5588 		else if (mode & S_IXUSR)
5589 			modestr = "*";
5590 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5591 		    got_tree_entry_get_name(te), modestr,
5592 		    link_target ? " -> ": "",
5593 		    link_target ? link_target : "") == -1) {
5594 			free(id_str);
5595 			free(link_target);
5596 			return got_error_from_errno("asprintf");
5597 		}
5598 		free(id_str);
5599 		free(link_target);
5600 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5601 		    0, 0);
5602 		if (err) {
5603 			free(line);
5604 			break;
5605 		}
5606 		if (n == s->selected) {
5607 			if (view->focussed)
5608 				wstandout(view->window);
5609 			s->selected_entry = te;
5610 		}
5611 		tc = match_color(&s->colors, line);
5612 		if (tc)
5613 			wattr_on(view->window,
5614 			    COLOR_PAIR(tc->colorpair), NULL);
5615 		waddwstr(view->window, wline);
5616 		if (tc)
5617 			wattr_off(view->window,
5618 			    COLOR_PAIR(tc->colorpair), NULL);
5619 		if (width < view->ncols - 1)
5620 			waddch(view->window, '\n');
5621 		if (n == s->selected && view->focussed)
5622 			wstandend(view->window);
5623 		free(line);
5624 		free(wline);
5625 		wline = NULL;
5626 		n++;
5627 		s->ndisplayed++;
5628 		s->last_displayed_entry = te;
5629 		if (--limit <= 0)
5630 			break;
5631 	}
5632 
5633 	return err;
5634 }
5635 
5636 static void
5637 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5638 {
5639 	struct got_tree_entry *te;
5640 	int isroot = s->tree == s->root;
5641 	int i = 0;
5642 
5643 	if (s->first_displayed_entry == NULL)
5644 		return;
5645 
5646 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5647 	while (i++ < maxscroll) {
5648 		if (te == NULL) {
5649 			if (!isroot)
5650 				s->first_displayed_entry = NULL;
5651 			break;
5652 		}
5653 		s->first_displayed_entry = te;
5654 		te = got_tree_entry_get_prev(s->tree, te);
5655 	}
5656 }
5657 
5658 static void
5659 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5660 {
5661 	struct got_tree_entry *next, *last;
5662 	int n = 0;
5663 
5664 	if (s->first_displayed_entry)
5665 		next = got_tree_entry_get_next(s->tree,
5666 		    s->first_displayed_entry);
5667 	else
5668 		next = got_object_tree_get_first_entry(s->tree);
5669 
5670 	last = s->last_displayed_entry;
5671 	while (next && last && n++ < maxscroll) {
5672 		last = got_tree_entry_get_next(s->tree, last);
5673 		if (last) {
5674 			s->first_displayed_entry = next;
5675 			next = got_tree_entry_get_next(s->tree, next);
5676 		}
5677 	}
5678 }
5679 
5680 static const struct got_error *
5681 tree_entry_path(char **path, struct tog_parent_trees *parents,
5682     struct got_tree_entry *te)
5683 {
5684 	const struct got_error *err = NULL;
5685 	struct tog_parent_tree *pt;
5686 	size_t len = 2; /* for leading slash and NUL */
5687 
5688 	TAILQ_FOREACH(pt, parents, entry)
5689 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5690 		    + 1 /* slash */;
5691 	if (te)
5692 		len += strlen(got_tree_entry_get_name(te));
5693 
5694 	*path = calloc(1, len);
5695 	if (path == NULL)
5696 		return got_error_from_errno("calloc");
5697 
5698 	(*path)[0] = '/';
5699 	pt = TAILQ_LAST(parents, tog_parent_trees);
5700 	while (pt) {
5701 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5702 		if (strlcat(*path, name, len) >= len) {
5703 			err = got_error(GOT_ERR_NO_SPACE);
5704 			goto done;
5705 		}
5706 		if (strlcat(*path, "/", len) >= len) {
5707 			err = got_error(GOT_ERR_NO_SPACE);
5708 			goto done;
5709 		}
5710 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5711 	}
5712 	if (te) {
5713 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5714 			err = got_error(GOT_ERR_NO_SPACE);
5715 			goto done;
5716 		}
5717 	}
5718 done:
5719 	if (err) {
5720 		free(*path);
5721 		*path = NULL;
5722 	}
5723 	return err;
5724 }
5725 
5726 static const struct got_error *
5727 blame_tree_entry(struct tog_view **new_view, int begin_x,
5728     struct got_tree_entry *te, struct tog_parent_trees *parents,
5729     struct got_object_id *commit_id, struct got_repository *repo)
5730 {
5731 	const struct got_error *err = NULL;
5732 	char *path;
5733 	struct tog_view *blame_view;
5734 
5735 	*new_view = NULL;
5736 
5737 	err = tree_entry_path(&path, parents, te);
5738 	if (err)
5739 		return err;
5740 
5741 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5742 	if (blame_view == NULL) {
5743 		err = got_error_from_errno("view_open");
5744 		goto done;
5745 	}
5746 
5747 	err = open_blame_view(blame_view, path, commit_id, repo);
5748 	if (err) {
5749 		if (err->code == GOT_ERR_CANCELLED)
5750 			err = NULL;
5751 		view_close(blame_view);
5752 	} else
5753 		*new_view = blame_view;
5754 done:
5755 	free(path);
5756 	return err;
5757 }
5758 
5759 static const struct got_error *
5760 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5761     struct tog_tree_view_state *s)
5762 {
5763 	struct tog_view *log_view;
5764 	const struct got_error *err = NULL;
5765 	char *path;
5766 
5767 	*new_view = NULL;
5768 
5769 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5770 	if (log_view == NULL)
5771 		return got_error_from_errno("view_open");
5772 
5773 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5774 	if (err)
5775 		return err;
5776 
5777 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5778 	    path, 0);
5779 	if (err)
5780 		view_close(log_view);
5781 	else
5782 		*new_view = log_view;
5783 	free(path);
5784 	return err;
5785 }
5786 
5787 static const struct got_error *
5788 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5789     const char *head_ref_name, struct got_repository *repo)
5790 {
5791 	const struct got_error *err = NULL;
5792 	char *commit_id_str = NULL;
5793 	struct tog_tree_view_state *s = &view->state.tree;
5794 	struct got_commit_object *commit = NULL;
5795 
5796 	TAILQ_INIT(&s->parents);
5797 	STAILQ_INIT(&s->colors);
5798 
5799 	s->commit_id = got_object_id_dup(commit_id);
5800 	if (s->commit_id == NULL)
5801 		return got_error_from_errno("got_object_id_dup");
5802 
5803 	err = got_object_open_as_commit(&commit, repo, commit_id);
5804 	if (err)
5805 		goto done;
5806 
5807 	/*
5808 	 * The root is opened here and will be closed when the view is closed.
5809 	 * Any visited subtrees and their path-wise parents are opened and
5810 	 * closed on demand.
5811 	 */
5812 	err = got_object_open_as_tree(&s->root, repo,
5813 	    got_object_commit_get_tree_id(commit));
5814 	if (err)
5815 		goto done;
5816 	s->tree = s->root;
5817 
5818 	err = got_object_id_str(&commit_id_str, commit_id);
5819 	if (err != NULL)
5820 		goto done;
5821 
5822 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5823 		err = got_error_from_errno("asprintf");
5824 		goto done;
5825 	}
5826 
5827 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5828 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5829 	if (head_ref_name) {
5830 		s->head_ref_name = strdup(head_ref_name);
5831 		if (s->head_ref_name == NULL) {
5832 			err = got_error_from_errno("strdup");
5833 			goto done;
5834 		}
5835 	}
5836 	s->repo = repo;
5837 
5838 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5839 		err = add_color(&s->colors, "\\$$",
5840 		    TOG_COLOR_TREE_SUBMODULE,
5841 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5842 		if (err)
5843 			goto done;
5844 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5845 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5846 		if (err)
5847 			goto done;
5848 		err = add_color(&s->colors, "/$",
5849 		    TOG_COLOR_TREE_DIRECTORY,
5850 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5851 		if (err)
5852 			goto done;
5853 
5854 		err = add_color(&s->colors, "\\*$",
5855 		    TOG_COLOR_TREE_EXECUTABLE,
5856 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5857 		if (err)
5858 			goto done;
5859 
5860 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5861 		    get_color_value("TOG_COLOR_COMMIT"));
5862 		if (err)
5863 			goto done;
5864 	}
5865 
5866 	view->show = show_tree_view;
5867 	view->input = input_tree_view;
5868 	view->close = close_tree_view;
5869 	view->search_start = search_start_tree_view;
5870 	view->search_next = search_next_tree_view;
5871 done:
5872 	free(commit_id_str);
5873 	if (commit)
5874 		got_object_commit_close(commit);
5875 	if (err)
5876 		close_tree_view(view);
5877 	return err;
5878 }
5879 
5880 static const struct got_error *
5881 close_tree_view(struct tog_view *view)
5882 {
5883 	struct tog_tree_view_state *s = &view->state.tree;
5884 
5885 	free_colors(&s->colors);
5886 	free(s->tree_label);
5887 	s->tree_label = NULL;
5888 	free(s->commit_id);
5889 	s->commit_id = NULL;
5890 	free(s->head_ref_name);
5891 	s->head_ref_name = NULL;
5892 	while (!TAILQ_EMPTY(&s->parents)) {
5893 		struct tog_parent_tree *parent;
5894 		parent = TAILQ_FIRST(&s->parents);
5895 		TAILQ_REMOVE(&s->parents, parent, entry);
5896 		if (parent->tree != s->root)
5897 			got_object_tree_close(parent->tree);
5898 		free(parent);
5899 
5900 	}
5901 	if (s->tree != NULL && s->tree != s->root)
5902 		got_object_tree_close(s->tree);
5903 	if (s->root)
5904 		got_object_tree_close(s->root);
5905 	return NULL;
5906 }
5907 
5908 static const struct got_error *
5909 search_start_tree_view(struct tog_view *view)
5910 {
5911 	struct tog_tree_view_state *s = &view->state.tree;
5912 
5913 	s->matched_entry = NULL;
5914 	return NULL;
5915 }
5916 
5917 static int
5918 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5919 {
5920 	regmatch_t regmatch;
5921 
5922 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5923 	    0) == 0;
5924 }
5925 
5926 static const struct got_error *
5927 search_next_tree_view(struct tog_view *view)
5928 {
5929 	struct tog_tree_view_state *s = &view->state.tree;
5930 	struct got_tree_entry *te = NULL;
5931 
5932 	if (!view->searching) {
5933 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5934 		return NULL;
5935 	}
5936 
5937 	if (s->matched_entry) {
5938 		if (view->searching == TOG_SEARCH_FORWARD) {
5939 			if (s->selected_entry)
5940 				te = got_tree_entry_get_next(s->tree,
5941 				    s->selected_entry);
5942 			else
5943 				te = got_object_tree_get_first_entry(s->tree);
5944 		} else {
5945 			if (s->selected_entry == NULL)
5946 				te = got_object_tree_get_last_entry(s->tree);
5947 			else
5948 				te = got_tree_entry_get_prev(s->tree,
5949 				    s->selected_entry);
5950 		}
5951 	} else {
5952 		if (s->selected_entry)
5953 			te = s->selected_entry;
5954 		else if (view->searching == TOG_SEARCH_FORWARD)
5955 			te = got_object_tree_get_first_entry(s->tree);
5956 		else
5957 			te = got_object_tree_get_last_entry(s->tree);
5958 	}
5959 
5960 	while (1) {
5961 		if (te == NULL) {
5962 			if (s->matched_entry == NULL) {
5963 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5964 				return NULL;
5965 			}
5966 			if (view->searching == TOG_SEARCH_FORWARD)
5967 				te = got_object_tree_get_first_entry(s->tree);
5968 			else
5969 				te = got_object_tree_get_last_entry(s->tree);
5970 		}
5971 
5972 		if (match_tree_entry(te, &view->regex)) {
5973 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5974 			s->matched_entry = te;
5975 			break;
5976 		}
5977 
5978 		if (view->searching == TOG_SEARCH_FORWARD)
5979 			te = got_tree_entry_get_next(s->tree, te);
5980 		else
5981 			te = got_tree_entry_get_prev(s->tree, te);
5982 	}
5983 
5984 	if (s->matched_entry) {
5985 		s->first_displayed_entry = s->matched_entry;
5986 		s->selected = 0;
5987 	}
5988 
5989 	return NULL;
5990 }
5991 
5992 static const struct got_error *
5993 show_tree_view(struct tog_view *view)
5994 {
5995 	const struct got_error *err = NULL;
5996 	struct tog_tree_view_state *s = &view->state.tree;
5997 	char *parent_path;
5998 
5999 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6000 	if (err)
6001 		return err;
6002 
6003 	err = draw_tree_entries(view, parent_path);
6004 	free(parent_path);
6005 
6006 	view_vborder(view);
6007 	return err;
6008 }
6009 
6010 static const struct got_error *
6011 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6012 {
6013 	const struct got_error *err = NULL;
6014 	struct tog_tree_view_state *s = &view->state.tree;
6015 	struct tog_view *log_view, *ref_view;
6016 	struct got_tree_entry *te;
6017 	int begin_x = 0, n, nscroll = view->nlines - 3;
6018 
6019 	switch (ch) {
6020 	case 'i':
6021 		s->show_ids = !s->show_ids;
6022 		view->count = 0;
6023 		break;
6024 	case 'l':
6025 		view->count = 0;
6026 		if (!s->selected_entry)
6027 			break;
6028 		if (view_is_parent_view(view))
6029 			begin_x = view_split_begin_x(view->begin_x);
6030 		err = log_selected_tree_entry(&log_view, begin_x, s);
6031 		view->focussed = 0;
6032 		log_view->focussed = 1;
6033 		if (view_is_parent_view(view)) {
6034 			err = view_close_child(view);
6035 			if (err)
6036 				return err;
6037 			err = view_set_child(view, log_view);
6038 			if (err)
6039 				return err;
6040 			view->focus_child = 1;
6041 		} else
6042 			*new_view = log_view;
6043 		break;
6044 	case 'r':
6045 		view->count = 0;
6046 		if (view_is_parent_view(view))
6047 			begin_x = view_split_begin_x(view->begin_x);
6048 		ref_view = view_open(view->nlines, view->ncols,
6049 		    view->begin_y, begin_x, TOG_VIEW_REF);
6050 		if (ref_view == NULL)
6051 			return got_error_from_errno("view_open");
6052 		err = open_ref_view(ref_view, s->repo);
6053 		if (err) {
6054 			view_close(ref_view);
6055 			return err;
6056 		}
6057 		view->focussed = 0;
6058 		ref_view->focussed = 1;
6059 		if (view_is_parent_view(view)) {
6060 			err = view_close_child(view);
6061 			if (err)
6062 				return err;
6063 			err = view_set_child(view, ref_view);
6064 			if (err)
6065 				return err;
6066 			view->focus_child = 1;
6067 		} else
6068 			*new_view = ref_view;
6069 		break;
6070 	case 'g':
6071 	case KEY_HOME:
6072 		s->selected = 0;
6073 		view->count = 0;
6074 		if (s->tree == s->root)
6075 			s->first_displayed_entry =
6076 			    got_object_tree_get_first_entry(s->tree);
6077 		else
6078 			s->first_displayed_entry = NULL;
6079 		break;
6080 	case 'G':
6081 	case KEY_END:
6082 		s->selected = 0;
6083 		view->count = 0;
6084 		te = got_object_tree_get_last_entry(s->tree);
6085 		for (n = 0; n < view->nlines - 3; n++) {
6086 			if (te == NULL) {
6087 				if(s->tree != s->root) {
6088 					s->first_displayed_entry = NULL;
6089 					n++;
6090 				}
6091 				break;
6092 			}
6093 			s->first_displayed_entry = te;
6094 			te = got_tree_entry_get_prev(s->tree, te);
6095 		}
6096 		if (n > 0)
6097 			s->selected = n - 1;
6098 		break;
6099 	case 'k':
6100 	case KEY_UP:
6101 	case CTRL('p'):
6102 		if (s->selected > 0) {
6103 			s->selected--;
6104 			break;
6105 		}
6106 		tree_scroll_up(s, 1);
6107 		if (s->selected_entry == NULL ||
6108 		    (s->tree == s->root && s->selected_entry ==
6109 		     got_object_tree_get_first_entry(s->tree)))
6110 			view->count = 0;
6111 		break;
6112 	case CTRL('u'):
6113 	case 'u':
6114 		nscroll /= 2;
6115 		/* FALL THROUGH */
6116 	case KEY_PPAGE:
6117 	case CTRL('b'):
6118 	case 'b':
6119 		if (s->tree == s->root) {
6120 			if (got_object_tree_get_first_entry(s->tree) ==
6121 			    s->first_displayed_entry)
6122 				s->selected -= MIN(s->selected, nscroll);
6123 		} else {
6124 			if (s->first_displayed_entry == NULL)
6125 				s->selected -= MIN(s->selected, nscroll);
6126 		}
6127 		tree_scroll_up(s, MAX(0, nscroll));
6128 		if (s->selected_entry == NULL ||
6129 		    (s->tree == s->root && s->selected_entry ==
6130 		     got_object_tree_get_first_entry(s->tree)))
6131 			view->count = 0;
6132 		break;
6133 	case 'j':
6134 	case KEY_DOWN:
6135 	case CTRL('n'):
6136 		if (s->selected < s->ndisplayed - 1) {
6137 			s->selected++;
6138 			break;
6139 		}
6140 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
6141 		    == NULL) {
6142 			/* can't scroll any further */
6143 			view->count = 0;
6144 			break;
6145 		}
6146 		tree_scroll_down(s, 1);
6147 		break;
6148 	case CTRL('d'):
6149 	case 'd':
6150 		nscroll /= 2;
6151 		/* FALL THROUGH */
6152 	case KEY_NPAGE:
6153 	case CTRL('f'):
6154 	case 'f':
6155 	case ' ':
6156 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
6157 		    == NULL) {
6158 			/* can't scroll any further; move cursor down */
6159 			if (s->selected < s->ndisplayed - 1)
6160 				s->selected += MIN(nscroll,
6161 				    s->ndisplayed - s->selected - 1);
6162 			else
6163 				view->count = 0;
6164 			break;
6165 		}
6166 		tree_scroll_down(s, nscroll);
6167 		break;
6168 	case KEY_ENTER:
6169 	case '\r':
6170 	case KEY_BACKSPACE:
6171 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
6172 			struct tog_parent_tree *parent;
6173 			/* user selected '..' */
6174 			if (s->tree == s->root) {
6175 				view->count = 0;
6176 				break;
6177 			}
6178 			parent = TAILQ_FIRST(&s->parents);
6179 			TAILQ_REMOVE(&s->parents, parent,
6180 			    entry);
6181 			got_object_tree_close(s->tree);
6182 			s->tree = parent->tree;
6183 			s->first_displayed_entry =
6184 			    parent->first_displayed_entry;
6185 			s->selected_entry =
6186 			    parent->selected_entry;
6187 			s->selected = parent->selected;
6188 			free(parent);
6189 		} else if (S_ISDIR(got_tree_entry_get_mode(
6190 		    s->selected_entry))) {
6191 			struct got_tree_object *subtree;
6192 			view->count = 0;
6193 			err = got_object_open_as_tree(&subtree, s->repo,
6194 			    got_tree_entry_get_id(s->selected_entry));
6195 			if (err)
6196 				break;
6197 			err = tree_view_visit_subtree(s, subtree);
6198 			if (err) {
6199 				got_object_tree_close(subtree);
6200 				break;
6201 			}
6202 		} else if (S_ISREG(got_tree_entry_get_mode(
6203 		    s->selected_entry))) {
6204 			struct tog_view *blame_view;
6205 			int begin_x = view_is_parent_view(view) ?
6206 			    view_split_begin_x(view->begin_x) : 0;
6207 
6208 			err = blame_tree_entry(&blame_view, begin_x,
6209 			    s->selected_entry, &s->parents,
6210 			    s->commit_id, s->repo);
6211 			if (err)
6212 				break;
6213 			view->count = 0;
6214 			view->focussed = 0;
6215 			blame_view->focussed = 1;
6216 			if (view_is_parent_view(view)) {
6217 				err = view_close_child(view);
6218 				if (err)
6219 					return err;
6220 				err = view_set_child(view, blame_view);
6221 				if (err)
6222 					return err;
6223 				view->focus_child = 1;
6224 			} else
6225 				*new_view = blame_view;
6226 		}
6227 		break;
6228 	case KEY_RESIZE:
6229 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6230 			s->selected = view->nlines - 4;
6231 		view->count = 0;
6232 		break;
6233 	default:
6234 		view->count = 0;
6235 		break;
6236 	}
6237 
6238 	return err;
6239 }
6240 
6241 __dead static void
6242 usage_tree(void)
6243 {
6244 	endwin();
6245 	fprintf(stderr,
6246 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6247 	    getprogname());
6248 	exit(1);
6249 }
6250 
6251 static const struct got_error *
6252 cmd_tree(int argc, char *argv[])
6253 {
6254 	const struct got_error *error;
6255 	struct got_repository *repo = NULL;
6256 	struct got_worktree *worktree = NULL;
6257 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6258 	struct got_object_id *commit_id = NULL;
6259 	struct got_commit_object *commit = NULL;
6260 	const char *commit_id_arg = NULL;
6261 	char *label = NULL;
6262 	struct got_reference *ref = NULL;
6263 	const char *head_ref_name = NULL;
6264 	int ch;
6265 	struct tog_view *view;
6266 	int *pack_fds = NULL;
6267 
6268 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6269 		switch (ch) {
6270 		case 'c':
6271 			commit_id_arg = optarg;
6272 			break;
6273 		case 'r':
6274 			repo_path = realpath(optarg, NULL);
6275 			if (repo_path == NULL)
6276 				return got_error_from_errno2("realpath",
6277 				    optarg);
6278 			break;
6279 		default:
6280 			usage_tree();
6281 			/* NOTREACHED */
6282 		}
6283 	}
6284 
6285 	argc -= optind;
6286 	argv += optind;
6287 
6288 	if (argc > 1)
6289 		usage_tree();
6290 
6291 	error = got_repo_pack_fds_open(&pack_fds);
6292 	if (error != NULL)
6293 		goto done;
6294 
6295 	if (repo_path == NULL) {
6296 		cwd = getcwd(NULL, 0);
6297 		if (cwd == NULL)
6298 			return got_error_from_errno("getcwd");
6299 		error = got_worktree_open(&worktree, cwd);
6300 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6301 			goto done;
6302 		if (worktree)
6303 			repo_path =
6304 			    strdup(got_worktree_get_repo_path(worktree));
6305 		else
6306 			repo_path = strdup(cwd);
6307 		if (repo_path == NULL) {
6308 			error = got_error_from_errno("strdup");
6309 			goto done;
6310 		}
6311 	}
6312 
6313 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6314 	if (error != NULL)
6315 		goto done;
6316 
6317 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6318 	    repo, worktree);
6319 	if (error)
6320 		goto done;
6321 
6322 	init_curses();
6323 
6324 	error = apply_unveil(got_repo_get_path(repo), NULL);
6325 	if (error)
6326 		goto done;
6327 
6328 	error = tog_load_refs(repo, 0);
6329 	if (error)
6330 		goto done;
6331 
6332 	if (commit_id_arg == NULL) {
6333 		error = got_repo_match_object_id(&commit_id, &label,
6334 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6335 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6336 		if (error)
6337 			goto done;
6338 		head_ref_name = label;
6339 	} else {
6340 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6341 		if (error == NULL)
6342 			head_ref_name = got_ref_get_name(ref);
6343 		else if (error->code != GOT_ERR_NOT_REF)
6344 			goto done;
6345 		error = got_repo_match_object_id(&commit_id, NULL,
6346 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6347 		if (error)
6348 			goto done;
6349 	}
6350 
6351 	error = got_object_open_as_commit(&commit, repo, commit_id);
6352 	if (error)
6353 		goto done;
6354 
6355 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6356 	if (view == NULL) {
6357 		error = got_error_from_errno("view_open");
6358 		goto done;
6359 	}
6360 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6361 	if (error)
6362 		goto done;
6363 	if (!got_path_is_root_dir(in_repo_path)) {
6364 		error = tree_view_walk_path(&view->state.tree, commit,
6365 		    in_repo_path);
6366 		if (error)
6367 			goto done;
6368 	}
6369 
6370 	if (worktree) {
6371 		/* Release work tree lock. */
6372 		got_worktree_close(worktree);
6373 		worktree = NULL;
6374 	}
6375 	error = view_loop(view);
6376 done:
6377 	free(repo_path);
6378 	free(cwd);
6379 	free(commit_id);
6380 	free(label);
6381 	if (ref)
6382 		got_ref_close(ref);
6383 	if (repo) {
6384 		const struct got_error *close_err = got_repo_close(repo);
6385 		if (error == NULL)
6386 			error = close_err;
6387 	}
6388 	if (pack_fds) {
6389 		const struct got_error *pack_err =
6390 		    got_repo_pack_fds_close(pack_fds);
6391 		if (error == NULL)
6392 			error = pack_err;
6393 	}
6394 	tog_free_refs();
6395 	return error;
6396 }
6397 
6398 static const struct got_error *
6399 ref_view_load_refs(struct tog_ref_view_state *s)
6400 {
6401 	struct got_reflist_entry *sre;
6402 	struct tog_reflist_entry *re;
6403 
6404 	s->nrefs = 0;
6405 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6406 		if (strncmp(got_ref_get_name(sre->ref),
6407 		    "refs/got/", 9) == 0 &&
6408 		    strncmp(got_ref_get_name(sre->ref),
6409 		    "refs/got/backup/", 16) != 0)
6410 			continue;
6411 
6412 		re = malloc(sizeof(*re));
6413 		if (re == NULL)
6414 			return got_error_from_errno("malloc");
6415 
6416 		re->ref = got_ref_dup(sre->ref);
6417 		if (re->ref == NULL)
6418 			return got_error_from_errno("got_ref_dup");
6419 		re->idx = s->nrefs++;
6420 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6421 	}
6422 
6423 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6424 	return NULL;
6425 }
6426 
6427 static void
6428 ref_view_free_refs(struct tog_ref_view_state *s)
6429 {
6430 	struct tog_reflist_entry *re;
6431 
6432 	while (!TAILQ_EMPTY(&s->refs)) {
6433 		re = TAILQ_FIRST(&s->refs);
6434 		TAILQ_REMOVE(&s->refs, re, entry);
6435 		got_ref_close(re->ref);
6436 		free(re);
6437 	}
6438 }
6439 
6440 static const struct got_error *
6441 open_ref_view(struct tog_view *view, struct got_repository *repo)
6442 {
6443 	const struct got_error *err = NULL;
6444 	struct tog_ref_view_state *s = &view->state.ref;
6445 
6446 	s->selected_entry = 0;
6447 	s->repo = repo;
6448 
6449 	TAILQ_INIT(&s->refs);
6450 	STAILQ_INIT(&s->colors);
6451 
6452 	err = ref_view_load_refs(s);
6453 	if (err)
6454 		return err;
6455 
6456 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6457 		err = add_color(&s->colors, "^refs/heads/",
6458 		    TOG_COLOR_REFS_HEADS,
6459 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6460 		if (err)
6461 			goto done;
6462 
6463 		err = add_color(&s->colors, "^refs/tags/",
6464 		    TOG_COLOR_REFS_TAGS,
6465 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6466 		if (err)
6467 			goto done;
6468 
6469 		err = add_color(&s->colors, "^refs/remotes/",
6470 		    TOG_COLOR_REFS_REMOTES,
6471 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6472 		if (err)
6473 			goto done;
6474 
6475 		err = add_color(&s->colors, "^refs/got/backup/",
6476 		    TOG_COLOR_REFS_BACKUP,
6477 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6478 		if (err)
6479 			goto done;
6480 	}
6481 
6482 	view->show = show_ref_view;
6483 	view->input = input_ref_view;
6484 	view->close = close_ref_view;
6485 	view->search_start = search_start_ref_view;
6486 	view->search_next = search_next_ref_view;
6487 done:
6488 	if (err)
6489 		free_colors(&s->colors);
6490 	return err;
6491 }
6492 
6493 static const struct got_error *
6494 close_ref_view(struct tog_view *view)
6495 {
6496 	struct tog_ref_view_state *s = &view->state.ref;
6497 
6498 	ref_view_free_refs(s);
6499 	free_colors(&s->colors);
6500 
6501 	return NULL;
6502 }
6503 
6504 static const struct got_error *
6505 resolve_reflist_entry(struct got_object_id **commit_id,
6506     struct tog_reflist_entry *re, struct got_repository *repo)
6507 {
6508 	const struct got_error *err = NULL;
6509 	struct got_object_id *obj_id;
6510 	struct got_tag_object *tag = NULL;
6511 	int obj_type;
6512 
6513 	*commit_id = NULL;
6514 
6515 	err = got_ref_resolve(&obj_id, repo, re->ref);
6516 	if (err)
6517 		return err;
6518 
6519 	err = got_object_get_type(&obj_type, repo, obj_id);
6520 	if (err)
6521 		goto done;
6522 
6523 	switch (obj_type) {
6524 	case GOT_OBJ_TYPE_COMMIT:
6525 		*commit_id = obj_id;
6526 		break;
6527 	case GOT_OBJ_TYPE_TAG:
6528 		err = got_object_open_as_tag(&tag, repo, obj_id);
6529 		if (err)
6530 			goto done;
6531 		free(obj_id);
6532 		err = got_object_get_type(&obj_type, repo,
6533 		    got_object_tag_get_object_id(tag));
6534 		if (err)
6535 			goto done;
6536 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6537 			err = got_error(GOT_ERR_OBJ_TYPE);
6538 			goto done;
6539 		}
6540 		*commit_id = got_object_id_dup(
6541 		    got_object_tag_get_object_id(tag));
6542 		if (*commit_id == NULL) {
6543 			err = got_error_from_errno("got_object_id_dup");
6544 			goto done;
6545 		}
6546 		break;
6547 	default:
6548 		err = got_error(GOT_ERR_OBJ_TYPE);
6549 		break;
6550 	}
6551 
6552 done:
6553 	if (tag)
6554 		got_object_tag_close(tag);
6555 	if (err) {
6556 		free(*commit_id);
6557 		*commit_id = NULL;
6558 	}
6559 	return err;
6560 }
6561 
6562 static const struct got_error *
6563 log_ref_entry(struct tog_view **new_view, int begin_x,
6564     struct tog_reflist_entry *re, struct got_repository *repo)
6565 {
6566 	struct tog_view *log_view;
6567 	const struct got_error *err = NULL;
6568 	struct got_object_id *commit_id = NULL;
6569 
6570 	*new_view = NULL;
6571 
6572 	err = resolve_reflist_entry(&commit_id, re, repo);
6573 	if (err) {
6574 		if (err->code != GOT_ERR_OBJ_TYPE)
6575 			return err;
6576 		else
6577 			return NULL;
6578 	}
6579 
6580 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6581 	if (log_view == NULL) {
6582 		err = got_error_from_errno("view_open");
6583 		goto done;
6584 	}
6585 
6586 	err = open_log_view(log_view, commit_id, repo,
6587 	    got_ref_get_name(re->ref), "", 0);
6588 done:
6589 	if (err)
6590 		view_close(log_view);
6591 	else
6592 		*new_view = log_view;
6593 	free(commit_id);
6594 	return err;
6595 }
6596 
6597 static void
6598 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6599 {
6600 	struct tog_reflist_entry *re;
6601 	int i = 0;
6602 
6603 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6604 		return;
6605 
6606 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6607 	while (i++ < maxscroll) {
6608 		if (re == NULL)
6609 			break;
6610 		s->first_displayed_entry = re;
6611 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6612 	}
6613 }
6614 
6615 static void
6616 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6617 {
6618 	struct tog_reflist_entry *next, *last;
6619 	int n = 0;
6620 
6621 	if (s->first_displayed_entry)
6622 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6623 	else
6624 		next = TAILQ_FIRST(&s->refs);
6625 
6626 	last = s->last_displayed_entry;
6627 	while (next && last && n++ < maxscroll) {
6628 		last = TAILQ_NEXT(last, entry);
6629 		if (last) {
6630 			s->first_displayed_entry = next;
6631 			next = TAILQ_NEXT(next, entry);
6632 		}
6633 	}
6634 }
6635 
6636 static const struct got_error *
6637 search_start_ref_view(struct tog_view *view)
6638 {
6639 	struct tog_ref_view_state *s = &view->state.ref;
6640 
6641 	s->matched_entry = NULL;
6642 	return NULL;
6643 }
6644 
6645 static int
6646 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6647 {
6648 	regmatch_t regmatch;
6649 
6650 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6651 	    0) == 0;
6652 }
6653 
6654 static const struct got_error *
6655 search_next_ref_view(struct tog_view *view)
6656 {
6657 	struct tog_ref_view_state *s = &view->state.ref;
6658 	struct tog_reflist_entry *re = NULL;
6659 
6660 	if (!view->searching) {
6661 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6662 		return NULL;
6663 	}
6664 
6665 	if (s->matched_entry) {
6666 		if (view->searching == TOG_SEARCH_FORWARD) {
6667 			if (s->selected_entry)
6668 				re = TAILQ_NEXT(s->selected_entry, entry);
6669 			else
6670 				re = TAILQ_PREV(s->selected_entry,
6671 				    tog_reflist_head, entry);
6672 		} else {
6673 			if (s->selected_entry == NULL)
6674 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6675 			else
6676 				re = TAILQ_PREV(s->selected_entry,
6677 				    tog_reflist_head, entry);
6678 		}
6679 	} else {
6680 		if (s->selected_entry)
6681 			re = s->selected_entry;
6682 		else if (view->searching == TOG_SEARCH_FORWARD)
6683 			re = TAILQ_FIRST(&s->refs);
6684 		else
6685 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6686 	}
6687 
6688 	while (1) {
6689 		if (re == NULL) {
6690 			if (s->matched_entry == NULL) {
6691 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6692 				return NULL;
6693 			}
6694 			if (view->searching == TOG_SEARCH_FORWARD)
6695 				re = TAILQ_FIRST(&s->refs);
6696 			else
6697 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6698 		}
6699 
6700 		if (match_reflist_entry(re, &view->regex)) {
6701 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6702 			s->matched_entry = re;
6703 			break;
6704 		}
6705 
6706 		if (view->searching == TOG_SEARCH_FORWARD)
6707 			re = TAILQ_NEXT(re, entry);
6708 		else
6709 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6710 	}
6711 
6712 	if (s->matched_entry) {
6713 		s->first_displayed_entry = s->matched_entry;
6714 		s->selected = 0;
6715 	}
6716 
6717 	return NULL;
6718 }
6719 
6720 static const struct got_error *
6721 show_ref_view(struct tog_view *view)
6722 {
6723 	const struct got_error *err = NULL;
6724 	struct tog_ref_view_state *s = &view->state.ref;
6725 	struct tog_reflist_entry *re;
6726 	char *line = NULL;
6727 	wchar_t *wline;
6728 	struct tog_color *tc;
6729 	int width, n;
6730 	int limit = view->nlines;
6731 
6732 	werase(view->window);
6733 
6734 	s->ndisplayed = 0;
6735 
6736 	if (limit == 0)
6737 		return NULL;
6738 
6739 	re = s->first_displayed_entry;
6740 
6741 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6742 	    s->nrefs) == -1)
6743 		return got_error_from_errno("asprintf");
6744 
6745 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6746 	if (err) {
6747 		free(line);
6748 		return err;
6749 	}
6750 	if (view_needs_focus_indication(view))
6751 		wstandout(view->window);
6752 	waddwstr(view->window, wline);
6753 	if (view_needs_focus_indication(view))
6754 		wstandend(view->window);
6755 	free(wline);
6756 	wline = NULL;
6757 	free(line);
6758 	line = NULL;
6759 	if (width < view->ncols - 1)
6760 		waddch(view->window, '\n');
6761 	if (--limit <= 0)
6762 		return NULL;
6763 
6764 	n = 0;
6765 	while (re && limit > 0) {
6766 		char *line = NULL;
6767 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6768 
6769 		if (s->show_date) {
6770 			struct got_commit_object *ci;
6771 			struct got_tag_object *tag;
6772 			struct got_object_id *id;
6773 			struct tm tm;
6774 			time_t t;
6775 
6776 			err = got_ref_resolve(&id, s->repo, re->ref);
6777 			if (err)
6778 				return err;
6779 			err = got_object_open_as_tag(&tag, s->repo, id);
6780 			if (err) {
6781 				if (err->code != GOT_ERR_OBJ_TYPE) {
6782 					free(id);
6783 					return err;
6784 				}
6785 				err = got_object_open_as_commit(&ci, s->repo,
6786 				    id);
6787 				if (err) {
6788 					free(id);
6789 					return err;
6790 				}
6791 				t = got_object_commit_get_committer_time(ci);
6792 				got_object_commit_close(ci);
6793 			} else {
6794 				t = got_object_tag_get_tagger_time(tag);
6795 				got_object_tag_close(tag);
6796 			}
6797 			free(id);
6798 			if (gmtime_r(&t, &tm) == NULL)
6799 				return got_error_from_errno("gmtime_r");
6800 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6801 				return got_error(GOT_ERR_NO_SPACE);
6802 		}
6803 		if (got_ref_is_symbolic(re->ref)) {
6804 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6805 			    ymd : "", got_ref_get_name(re->ref),
6806 			    got_ref_get_symref_target(re->ref)) == -1)
6807 				return got_error_from_errno("asprintf");
6808 		} else if (s->show_ids) {
6809 			struct got_object_id *id;
6810 			char *id_str;
6811 			err = got_ref_resolve(&id, s->repo, re->ref);
6812 			if (err)
6813 				return err;
6814 			err = got_object_id_str(&id_str, id);
6815 			if (err) {
6816 				free(id);
6817 				return err;
6818 			}
6819 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6820 			    got_ref_get_name(re->ref), id_str) == -1) {
6821 				err = got_error_from_errno("asprintf");
6822 				free(id);
6823 				free(id_str);
6824 				return err;
6825 			}
6826 			free(id);
6827 			free(id_str);
6828 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6829 		    got_ref_get_name(re->ref)) == -1)
6830 			return got_error_from_errno("asprintf");
6831 
6832 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6833 		    0, 0);
6834 		if (err) {
6835 			free(line);
6836 			return err;
6837 		}
6838 		if (n == s->selected) {
6839 			if (view->focussed)
6840 				wstandout(view->window);
6841 			s->selected_entry = re;
6842 		}
6843 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6844 		if (tc)
6845 			wattr_on(view->window,
6846 			    COLOR_PAIR(tc->colorpair), NULL);
6847 		waddwstr(view->window, wline);
6848 		if (tc)
6849 			wattr_off(view->window,
6850 			    COLOR_PAIR(tc->colorpair), NULL);
6851 		if (width < view->ncols - 1)
6852 			waddch(view->window, '\n');
6853 		if (n == s->selected && view->focussed)
6854 			wstandend(view->window);
6855 		free(line);
6856 		free(wline);
6857 		wline = NULL;
6858 		n++;
6859 		s->ndisplayed++;
6860 		s->last_displayed_entry = re;
6861 
6862 		limit--;
6863 		re = TAILQ_NEXT(re, entry);
6864 	}
6865 
6866 	view_vborder(view);
6867 	return err;
6868 }
6869 
6870 static const struct got_error *
6871 browse_ref_tree(struct tog_view **new_view, int begin_x,
6872     struct tog_reflist_entry *re, struct got_repository *repo)
6873 {
6874 	const struct got_error *err = NULL;
6875 	struct got_object_id *commit_id = NULL;
6876 	struct tog_view *tree_view;
6877 
6878 	*new_view = NULL;
6879 
6880 	err = resolve_reflist_entry(&commit_id, re, repo);
6881 	if (err) {
6882 		if (err->code != GOT_ERR_OBJ_TYPE)
6883 			return err;
6884 		else
6885 			return NULL;
6886 	}
6887 
6888 
6889 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6890 	if (tree_view == NULL) {
6891 		err = got_error_from_errno("view_open");
6892 		goto done;
6893 	}
6894 
6895 	err = open_tree_view(tree_view, commit_id,
6896 	    got_ref_get_name(re->ref), repo);
6897 	if (err)
6898 		goto done;
6899 
6900 	*new_view = tree_view;
6901 done:
6902 	free(commit_id);
6903 	return err;
6904 }
6905 static const struct got_error *
6906 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6907 {
6908 	const struct got_error *err = NULL;
6909 	struct tog_ref_view_state *s = &view->state.ref;
6910 	struct tog_view *log_view, *tree_view;
6911 	struct tog_reflist_entry *re;
6912 	int begin_x = 0, n, nscroll = view->nlines - 1;
6913 
6914 	switch (ch) {
6915 	case 'i':
6916 		s->show_ids = !s->show_ids;
6917 		view->count = 0;
6918 		break;
6919 	case 'm':
6920 		s->show_date = !s->show_date;
6921 		view->count = 0;
6922 		break;
6923 	case 'o':
6924 		s->sort_by_date = !s->sort_by_date;
6925 		view->count = 0;
6926 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6927 		    got_ref_cmp_by_commit_timestamp_descending :
6928 		    tog_ref_cmp_by_name, s->repo);
6929 		if (err)
6930 			break;
6931 		got_reflist_object_id_map_free(tog_refs_idmap);
6932 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6933 		    &tog_refs, s->repo);
6934 		if (err)
6935 			break;
6936 		ref_view_free_refs(s);
6937 		err = ref_view_load_refs(s);
6938 		break;
6939 	case KEY_ENTER:
6940 	case '\r':
6941 		view->count = 0;
6942 		if (!s->selected_entry)
6943 			break;
6944 		if (view_is_parent_view(view))
6945 			begin_x = view_split_begin_x(view->begin_x);
6946 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6947 		    s->repo);
6948 		view->focussed = 0;
6949 		log_view->focussed = 1;
6950 		if (view_is_parent_view(view)) {
6951 			err = view_close_child(view);
6952 			if (err)
6953 				return err;
6954 			err = view_set_child(view, log_view);
6955 			if (err)
6956 				return err;
6957 			view->focus_child = 1;
6958 		} else
6959 			*new_view = log_view;
6960 		break;
6961 	case 't':
6962 		view->count = 0;
6963 		if (!s->selected_entry)
6964 			break;
6965 		if (view_is_parent_view(view))
6966 			begin_x = view_split_begin_x(view->begin_x);
6967 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6968 		    s->repo);
6969 		if (err || tree_view == NULL)
6970 			break;
6971 		view->focussed = 0;
6972 		tree_view->focussed = 1;
6973 		if (view_is_parent_view(view)) {
6974 			err = view_close_child(view);
6975 			if (err)
6976 				return err;
6977 			err = view_set_child(view, tree_view);
6978 			if (err)
6979 				return err;
6980 			view->focus_child = 1;
6981 		} else
6982 			*new_view = tree_view;
6983 		break;
6984 	case 'g':
6985 	case KEY_HOME:
6986 		s->selected = 0;
6987 		view->count = 0;
6988 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6989 		break;
6990 	case 'G':
6991 	case KEY_END:
6992 		s->selected = 0;
6993 		view->count = 0;
6994 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6995 		for (n = 0; n < view->nlines - 1; n++) {
6996 			if (re == NULL)
6997 				break;
6998 			s->first_displayed_entry = re;
6999 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7000 		}
7001 		if (n > 0)
7002 			s->selected = n - 1;
7003 		break;
7004 	case 'k':
7005 	case KEY_UP:
7006 	case CTRL('p'):
7007 		if (s->selected > 0) {
7008 			s->selected--;
7009 			break;
7010 		}
7011 		ref_scroll_up(s, 1);
7012 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7013 			view->count = 0;
7014 		break;
7015 	case CTRL('u'):
7016 	case 'u':
7017 		nscroll /= 2;
7018 		/* FALL THROUGH */
7019 	case KEY_PPAGE:
7020 	case CTRL('b'):
7021 	case 'b':
7022 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7023 			s->selected -= MIN(nscroll, s->selected);
7024 		ref_scroll_up(s, MAX(0, nscroll));
7025 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7026 			view->count = 0;
7027 		break;
7028 	case 'j':
7029 	case KEY_DOWN:
7030 	case CTRL('n'):
7031 		if (s->selected < s->ndisplayed - 1) {
7032 			s->selected++;
7033 			break;
7034 		}
7035 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7036 			/* can't scroll any further */
7037 			view->count = 0;
7038 			break;
7039 		}
7040 		ref_scroll_down(s, 1);
7041 		break;
7042 	case CTRL('d'):
7043 	case 'd':
7044 		nscroll /= 2;
7045 		/* FALL THROUGH */
7046 	case KEY_NPAGE:
7047 	case CTRL('f'):
7048 	case 'f':
7049 	case ' ':
7050 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7051 			/* can't scroll any further; move cursor down */
7052 			if (s->selected < s->ndisplayed - 1)
7053 				s->selected += MIN(nscroll,
7054 				    s->ndisplayed - s->selected - 1);
7055 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7056 				s->selected += s->ndisplayed - s->selected - 1;
7057 			view->count = 0;
7058 			break;
7059 		}
7060 		ref_scroll_down(s, nscroll);
7061 		break;
7062 	case CTRL('l'):
7063 		view->count = 0;
7064 		tog_free_refs();
7065 		err = tog_load_refs(s->repo, s->sort_by_date);
7066 		if (err)
7067 			break;
7068 		ref_view_free_refs(s);
7069 		err = ref_view_load_refs(s);
7070 		break;
7071 	case KEY_RESIZE:
7072 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7073 			s->selected = view->nlines - 2;
7074 		break;
7075 	default:
7076 		view->count = 0;
7077 		break;
7078 	}
7079 
7080 	return err;
7081 }
7082 
7083 __dead static void
7084 usage_ref(void)
7085 {
7086 	endwin();
7087 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
7088 	    getprogname());
7089 	exit(1);
7090 }
7091 
7092 static const struct got_error *
7093 cmd_ref(int argc, char *argv[])
7094 {
7095 	const struct got_error *error;
7096 	struct got_repository *repo = NULL;
7097 	struct got_worktree *worktree = NULL;
7098 	char *cwd = NULL, *repo_path = NULL;
7099 	int ch;
7100 	struct tog_view *view;
7101 	int *pack_fds = NULL;
7102 
7103 	while ((ch = getopt(argc, argv, "r:")) != -1) {
7104 		switch (ch) {
7105 		case 'r':
7106 			repo_path = realpath(optarg, NULL);
7107 			if (repo_path == NULL)
7108 				return got_error_from_errno2("realpath",
7109 				    optarg);
7110 			break;
7111 		default:
7112 			usage_ref();
7113 			/* NOTREACHED */
7114 		}
7115 	}
7116 
7117 	argc -= optind;
7118 	argv += optind;
7119 
7120 	if (argc > 1)
7121 		usage_ref();
7122 
7123 	error = got_repo_pack_fds_open(&pack_fds);
7124 	if (error != NULL)
7125 		goto done;
7126 
7127 	if (repo_path == NULL) {
7128 		cwd = getcwd(NULL, 0);
7129 		if (cwd == NULL)
7130 			return got_error_from_errno("getcwd");
7131 		error = got_worktree_open(&worktree, cwd);
7132 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7133 			goto done;
7134 		if (worktree)
7135 			repo_path =
7136 			    strdup(got_worktree_get_repo_path(worktree));
7137 		else
7138 			repo_path = strdup(cwd);
7139 		if (repo_path == NULL) {
7140 			error = got_error_from_errno("strdup");
7141 			goto done;
7142 		}
7143 	}
7144 
7145 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7146 	if (error != NULL)
7147 		goto done;
7148 
7149 	init_curses();
7150 
7151 	error = apply_unveil(got_repo_get_path(repo), NULL);
7152 	if (error)
7153 		goto done;
7154 
7155 	error = tog_load_refs(repo, 0);
7156 	if (error)
7157 		goto done;
7158 
7159 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
7160 	if (view == NULL) {
7161 		error = got_error_from_errno("view_open");
7162 		goto done;
7163 	}
7164 
7165 	error = open_ref_view(view, repo);
7166 	if (error)
7167 		goto done;
7168 
7169 	if (worktree) {
7170 		/* Release work tree lock. */
7171 		got_worktree_close(worktree);
7172 		worktree = NULL;
7173 	}
7174 	error = view_loop(view);
7175 done:
7176 	free(repo_path);
7177 	free(cwd);
7178 	if (repo) {
7179 		const struct got_error *close_err = got_repo_close(repo);
7180 		if (close_err)
7181 			error = close_err;
7182 	}
7183 	if (pack_fds) {
7184 		const struct got_error *pack_err =
7185 		    got_repo_pack_fds_close(pack_fds);
7186 		if (error == NULL)
7187 			error = pack_err;
7188 	}
7189 	tog_free_refs();
7190 	return error;
7191 }
7192 
7193 static void
7194 list_commands(FILE *fp)
7195 {
7196 	size_t i;
7197 
7198 	fprintf(fp, "commands:");
7199 	for (i = 0; i < nitems(tog_commands); i++) {
7200 		const struct tog_cmd *cmd = &tog_commands[i];
7201 		fprintf(fp, " %s", cmd->name);
7202 	}
7203 	fputc('\n', fp);
7204 }
7205 
7206 __dead static void
7207 usage(int hflag, int status)
7208 {
7209 	FILE *fp = (status == 0) ? stdout : stderr;
7210 
7211 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7212 	    getprogname());
7213 	if (hflag) {
7214 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7215 		list_commands(fp);
7216 	}
7217 	exit(status);
7218 }
7219 
7220 static char **
7221 make_argv(int argc, ...)
7222 {
7223 	va_list ap;
7224 	char **argv;
7225 	int i;
7226 
7227 	va_start(ap, argc);
7228 
7229 	argv = calloc(argc, sizeof(char *));
7230 	if (argv == NULL)
7231 		err(1, "calloc");
7232 	for (i = 0; i < argc; i++) {
7233 		argv[i] = strdup(va_arg(ap, char *));
7234 		if (argv[i] == NULL)
7235 			err(1, "strdup");
7236 	}
7237 
7238 	va_end(ap);
7239 	return argv;
7240 }
7241 
7242 /*
7243  * Try to convert 'tog path' into a 'tog log path' command.
7244  * The user could simply have mistyped the command rather than knowingly
7245  * provided a path. So check whether argv[0] can in fact be resolved
7246  * to a path in the HEAD commit and print a special error if not.
7247  * This hack is for mpi@ <3
7248  */
7249 static const struct got_error *
7250 tog_log_with_path(int argc, char *argv[])
7251 {
7252 	const struct got_error *error = NULL, *close_err;
7253 	const struct tog_cmd *cmd = NULL;
7254 	struct got_repository *repo = NULL;
7255 	struct got_worktree *worktree = NULL;
7256 	struct got_object_id *commit_id = NULL, *id = NULL;
7257 	struct got_commit_object *commit = NULL;
7258 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7259 	char *commit_id_str = NULL, **cmd_argv = NULL;
7260 	int *pack_fds = NULL;
7261 
7262 	cwd = getcwd(NULL, 0);
7263 	if (cwd == NULL)
7264 		return got_error_from_errno("getcwd");
7265 
7266 	error = got_repo_pack_fds_open(&pack_fds);
7267 	if (error != NULL)
7268 		goto done;
7269 
7270 	error = got_worktree_open(&worktree, cwd);
7271 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7272 		goto done;
7273 
7274 	if (worktree)
7275 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7276 	else
7277 		repo_path = strdup(cwd);
7278 	if (repo_path == NULL) {
7279 		error = got_error_from_errno("strdup");
7280 		goto done;
7281 	}
7282 
7283 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7284 	if (error != NULL)
7285 		goto done;
7286 
7287 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7288 	    repo, worktree);
7289 	if (error)
7290 		goto done;
7291 
7292 	error = tog_load_refs(repo, 0);
7293 	if (error)
7294 		goto done;
7295 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7296 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7297 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7298 	if (error)
7299 		goto done;
7300 
7301 	if (worktree) {
7302 		got_worktree_close(worktree);
7303 		worktree = NULL;
7304 	}
7305 
7306 	error = got_object_open_as_commit(&commit, repo, commit_id);
7307 	if (error)
7308 		goto done;
7309 
7310 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7311 	if (error) {
7312 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7313 			goto done;
7314 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7315 		    getprogname(), argv[0]);
7316 		usage(1, 1);
7317 		/* not reached */
7318 	}
7319 
7320 	close_err = got_repo_close(repo);
7321 	if (error == NULL)
7322 		error = close_err;
7323 	repo = NULL;
7324 
7325 	error = got_object_id_str(&commit_id_str, commit_id);
7326 	if (error)
7327 		goto done;
7328 
7329 	cmd = &tog_commands[0]; /* log */
7330 	argc = 4;
7331 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7332 	error = cmd->cmd_main(argc, cmd_argv);
7333 done:
7334 	if (repo) {
7335 		close_err = got_repo_close(repo);
7336 		if (error == NULL)
7337 			error = close_err;
7338 	}
7339 	if (commit)
7340 		got_object_commit_close(commit);
7341 	if (worktree)
7342 		got_worktree_close(worktree);
7343 	if (pack_fds) {
7344 		const struct got_error *pack_err =
7345 		    got_repo_pack_fds_close(pack_fds);
7346 		if (error == NULL)
7347 			error = pack_err;
7348 	}
7349 	free(id);
7350 	free(commit_id_str);
7351 	free(commit_id);
7352 	free(cwd);
7353 	free(repo_path);
7354 	free(in_repo_path);
7355 	if (cmd_argv) {
7356 		int i;
7357 		for (i = 0; i < argc; i++)
7358 			free(cmd_argv[i]);
7359 		free(cmd_argv);
7360 	}
7361 	tog_free_refs();
7362 	return error;
7363 }
7364 
7365 int
7366 main(int argc, char *argv[])
7367 {
7368 	const struct got_error *error = NULL;
7369 	const struct tog_cmd *cmd = NULL;
7370 	int ch, hflag = 0, Vflag = 0;
7371 	char **cmd_argv = NULL;
7372 	static const struct option longopts[] = {
7373 	    { "version", no_argument, NULL, 'V' },
7374 	    { NULL, 0, NULL, 0}
7375 	};
7376 
7377 	setlocale(LC_CTYPE, "");
7378 
7379 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7380 		switch (ch) {
7381 		case 'h':
7382 			hflag = 1;
7383 			break;
7384 		case 'V':
7385 			Vflag = 1;
7386 			break;
7387 		default:
7388 			usage(hflag, 1);
7389 			/* NOTREACHED */
7390 		}
7391 	}
7392 
7393 	argc -= optind;
7394 	argv += optind;
7395 	optind = 1;
7396 	optreset = 1;
7397 
7398 	if (Vflag) {
7399 		got_version_print_str();
7400 		return 0;
7401 	}
7402 
7403 #ifndef PROFILE
7404 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7405 	    NULL) == -1)
7406 		err(1, "pledge");
7407 #endif
7408 
7409 	if (argc == 0) {
7410 		if (hflag)
7411 			usage(hflag, 0);
7412 		/* Build an argument vector which runs a default command. */
7413 		cmd = &tog_commands[0];
7414 		argc = 1;
7415 		cmd_argv = make_argv(argc, cmd->name);
7416 	} else {
7417 		size_t i;
7418 
7419 		/* Did the user specify a command? */
7420 		for (i = 0; i < nitems(tog_commands); i++) {
7421 			if (strncmp(tog_commands[i].name, argv[0],
7422 			    strlen(argv[0])) == 0) {
7423 				cmd = &tog_commands[i];
7424 				break;
7425 			}
7426 		}
7427 	}
7428 
7429 	if (cmd == NULL) {
7430 		if (argc != 1)
7431 			usage(0, 1);
7432 		/* No command specified; try log with a path */
7433 		error = tog_log_with_path(argc, argv);
7434 	} else {
7435 		if (hflag)
7436 			cmd->cmd_usage();
7437 		else
7438 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7439 	}
7440 
7441 	endwin();
7442 	putchar('\n');
7443 	if (cmd_argv) {
7444 		int i;
7445 		for (i = 0; i < argc; i++)
7446 			free(cmd_argv[i]);
7447 		free(cmd_argv);
7448 	}
7449 
7450 	if (error && error->code != GOT_ERR_CANCELLED)
7451 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7452 	return 0;
7453 }