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