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