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