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