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 		s->matched_entry = NULL;
2804 		s->search_entry = NULL;
2805 		break;
2806 	case 'r':
2807 		if (view_is_parent_view(view))
2808 			begin_x = view_split_begin_x(view->begin_x);
2809 		ref_view = view_open(view->nlines, view->ncols,
2810 		    view->begin_y, begin_x, TOG_VIEW_REF);
2811 		if (ref_view == NULL)
2812 			return got_error_from_errno("view_open");
2813 		err = open_ref_view(ref_view, s->repo);
2814 		if (err) {
2815 			view_close(ref_view);
2816 			return err;
2817 		}
2818 		view->focussed = 0;
2819 		ref_view->focussed = 1;
2820 		if (view_is_parent_view(view)) {
2821 			err = view_close_child(view);
2822 			if (err)
2823 				return err;
2824 			err = view_set_child(view, ref_view);
2825 			if (err)
2826 				return err;
2827 			view->focus_child = 1;
2828 		} else
2829 			*new_view = ref_view;
2830 		break;
2831 	default:
2832 		break;
2833 	}
2834 
2835 	return err;
2836 }
2837 
2838 static const struct got_error *
2839 apply_unveil(const char *repo_path, const char *worktree_path)
2840 {
2841 	const struct got_error *error;
2842 
2843 #ifdef PROFILE
2844 	if (unveil("gmon.out", "rwc") != 0)
2845 		return got_error_from_errno2("unveil", "gmon.out");
2846 #endif
2847 	if (repo_path && unveil(repo_path, "r") != 0)
2848 		return got_error_from_errno2("unveil", repo_path);
2849 
2850 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2851 		return got_error_from_errno2("unveil", worktree_path);
2852 
2853 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2854 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2855 
2856 	error = got_privsep_unveil_exec_helpers();
2857 	if (error != NULL)
2858 		return error;
2859 
2860 	if (unveil(NULL, NULL) != 0)
2861 		return got_error_from_errno("unveil");
2862 
2863 	return NULL;
2864 }
2865 
2866 static void
2867 init_curses(void)
2868 {
2869 	/*
2870 	 * Override default signal handlers before starting ncurses.
2871 	 * This should prevent ncurses from installing its own
2872 	 * broken cleanup() signal handler.
2873 	 */
2874 	signal(SIGWINCH, tog_sigwinch);
2875 	signal(SIGPIPE, tog_sigpipe);
2876 	signal(SIGCONT, tog_sigcont);
2877 	signal(SIGINT, tog_sigint);
2878 	signal(SIGTERM, tog_sigterm);
2879 
2880 	initscr();
2881 	cbreak();
2882 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2883 	noecho();
2884 	nonl();
2885 	intrflush(stdscr, FALSE);
2886 	keypad(stdscr, TRUE);
2887 	curs_set(0);
2888 	if (getenv("TOG_COLORS") != NULL) {
2889 		start_color();
2890 		use_default_colors();
2891 	}
2892 }
2893 
2894 static const struct got_error *
2895 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2896     struct got_repository *repo, struct got_worktree *worktree)
2897 {
2898 	const struct got_error *err = NULL;
2899 
2900 	if (argc == 0) {
2901 		*in_repo_path = strdup("/");
2902 		if (*in_repo_path == NULL)
2903 			return got_error_from_errno("strdup");
2904 		return NULL;
2905 	}
2906 
2907 	if (worktree) {
2908 		const char *prefix = got_worktree_get_path_prefix(worktree);
2909 		char *p;
2910 
2911 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2912 		if (err)
2913 			return err;
2914 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2915 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2916 		    p) == -1) {
2917 			err = got_error_from_errno("asprintf");
2918 			*in_repo_path = NULL;
2919 		}
2920 		free(p);
2921 	} else
2922 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2923 
2924 	return err;
2925 }
2926 
2927 static const struct got_error *
2928 cmd_log(int argc, char *argv[])
2929 {
2930 	const struct got_error *error;
2931 	struct got_repository *repo = NULL;
2932 	struct got_worktree *worktree = NULL;
2933 	struct got_object_id *start_id = NULL;
2934 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2935 	char *start_commit = NULL, *label = NULL;
2936 	struct got_reference *ref = NULL;
2937 	const char *head_ref_name = NULL;
2938 	int ch, log_branches = 0;
2939 	struct tog_view *view;
2940 	int *pack_fds = NULL;
2941 
2942 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2943 		switch (ch) {
2944 		case 'b':
2945 			log_branches = 1;
2946 			break;
2947 		case 'c':
2948 			start_commit = optarg;
2949 			break;
2950 		case 'r':
2951 			repo_path = realpath(optarg, NULL);
2952 			if (repo_path == NULL)
2953 				return got_error_from_errno2("realpath",
2954 				    optarg);
2955 			break;
2956 		default:
2957 			usage_log();
2958 			/* NOTREACHED */
2959 		}
2960 	}
2961 
2962 	argc -= optind;
2963 	argv += optind;
2964 
2965 	if (argc > 1)
2966 		usage_log();
2967 
2968 	error = got_repo_pack_fds_open(&pack_fds);
2969 	if (error != NULL)
2970 		goto done;
2971 
2972 	if (repo_path == NULL) {
2973 		cwd = getcwd(NULL, 0);
2974 		if (cwd == NULL)
2975 			return got_error_from_errno("getcwd");
2976 		error = got_worktree_open(&worktree, cwd);
2977 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2978 			goto done;
2979 		if (worktree)
2980 			repo_path =
2981 			    strdup(got_worktree_get_repo_path(worktree));
2982 		else
2983 			repo_path = strdup(cwd);
2984 		if (repo_path == NULL) {
2985 			error = got_error_from_errno("strdup");
2986 			goto done;
2987 		}
2988 	}
2989 
2990 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
2991 	if (error != NULL)
2992 		goto done;
2993 
2994 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
2995 	    repo, worktree);
2996 	if (error)
2997 		goto done;
2998 
2999 	init_curses();
3000 
3001 	error = apply_unveil(got_repo_get_path(repo),
3002 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3003 	if (error)
3004 		goto done;
3005 
3006 	/* already loaded by tog_log_with_path()? */
3007 	if (TAILQ_EMPTY(&tog_refs)) {
3008 		error = tog_load_refs(repo, 0);
3009 		if (error)
3010 			goto done;
3011 	}
3012 
3013 	if (start_commit == NULL) {
3014 		error = got_repo_match_object_id(&start_id, &label,
3015 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3016 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3017 		if (error)
3018 			goto done;
3019 		head_ref_name = label;
3020 	} else {
3021 		error = got_ref_open(&ref, repo, start_commit, 0);
3022 		if (error == NULL)
3023 			head_ref_name = got_ref_get_name(ref);
3024 		else if (error->code != GOT_ERR_NOT_REF)
3025 			goto done;
3026 		error = got_repo_match_object_id(&start_id, NULL,
3027 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3028 		if (error)
3029 			goto done;
3030 	}
3031 
3032 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3033 	if (view == NULL) {
3034 		error = got_error_from_errno("view_open");
3035 		goto done;
3036 	}
3037 	error = open_log_view(view, start_id, repo, head_ref_name,
3038 	    in_repo_path, log_branches);
3039 	if (error)
3040 		goto done;
3041 	if (worktree) {
3042 		/* Release work tree lock. */
3043 		got_worktree_close(worktree);
3044 		worktree = NULL;
3045 	}
3046 	error = view_loop(view);
3047 done:
3048 	free(in_repo_path);
3049 	free(repo_path);
3050 	free(cwd);
3051 	free(start_id);
3052 	free(label);
3053 	if (ref)
3054 		got_ref_close(ref);
3055 	if (repo) {
3056 		const struct got_error *close_err = got_repo_close(repo);
3057 		if (error == NULL)
3058 			error = close_err;
3059 	}
3060 	if (worktree)
3061 		got_worktree_close(worktree);
3062 	if (pack_fds) {
3063 		const struct got_error *pack_err =
3064 		    got_repo_pack_fds_close(pack_fds);
3065 		if (error == NULL)
3066 			error = pack_err;
3067 	}
3068 	tog_free_refs();
3069 	return error;
3070 }
3071 
3072 __dead static void
3073 usage_diff(void)
3074 {
3075 	endwin();
3076 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3077 	    "[-w] object1 object2\n", getprogname());
3078 	exit(1);
3079 }
3080 
3081 static int
3082 match_line(const char *line, regex_t *regex, size_t nmatch,
3083     regmatch_t *regmatch)
3084 {
3085 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3086 }
3087 
3088 struct tog_color *
3089 match_color(struct tog_colors *colors, const char *line)
3090 {
3091 	struct tog_color *tc = NULL;
3092 
3093 	STAILQ_FOREACH(tc, colors, entry) {
3094 		if (match_line(line, &tc->regex, 0, NULL))
3095 			return tc;
3096 	}
3097 
3098 	return NULL;
3099 }
3100 
3101 static const struct got_error *
3102 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3103     WINDOW *window, int skipcol, regmatch_t *regmatch)
3104 {
3105 	const struct got_error *err = NULL;
3106 	char *exstr = NULL;
3107 	wchar_t *wline = NULL;
3108 	int rme, rms, n, width, scrollx;
3109 	int width0 = 0, width1 = 0, width2 = 0;
3110 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3111 
3112 	*wtotal = 0;
3113 
3114 	rms = regmatch->rm_so;
3115 	rme = regmatch->rm_eo;
3116 
3117 	err = expand_tab(&exstr, line);
3118 	if (err)
3119 		return err;
3120 
3121 	/* Split the line into 3 segments, according to match offsets. */
3122 	seg0 = strndup(exstr, rms);
3123 	if (seg0 == NULL) {
3124 		err = got_error_from_errno("strndup");
3125 		goto done;
3126 	}
3127 	seg1 = strndup(exstr + rms, rme - rms);
3128 	if (seg1 == NULL) {
3129 		err = got_error_from_errno("strndup");
3130 		goto done;
3131 	}
3132 	seg2 = strdup(exstr + rme);
3133 	if (seg2 == NULL) {
3134 		err = got_error_from_errno("strndup");
3135 		goto done;
3136 	}
3137 
3138 	/* draw up to matched token if we haven't scrolled past it */
3139 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3140 	    col_tab_align, 1);
3141 	if (err)
3142 		goto done;
3143 	n = MAX(width0 - skipcol, 0);
3144 	if (n) {
3145 		free(wline);
3146 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3147 		    wlimit, col_tab_align, 1);
3148 		if (err)
3149 			goto done;
3150 		waddwstr(window, &wline[scrollx]);
3151 		wlimit -= width;
3152 		*wtotal += width;
3153 	}
3154 
3155 	if (wlimit > 0) {
3156 		int i = 0, w = 0;
3157 		size_t wlen;
3158 
3159 		free(wline);
3160 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3161 		    col_tab_align, 1);
3162 		if (err)
3163 			goto done;
3164 		wlen = wcslen(wline);
3165 		while (i < wlen) {
3166 			width = wcwidth(wline[i]);
3167 			if (width == -1) {
3168 				/* should not happen, tabs are expanded */
3169 				err = got_error(GOT_ERR_RANGE);
3170 				goto done;
3171 			}
3172 			if (width0 + w + width > skipcol)
3173 				break;
3174 			w += width; 
3175 			i++;
3176 		}
3177 		/* draw (visible part of) matched token (if scrolled into it) */
3178 		if (width1 - w > 0) {
3179 			wattron(window, A_STANDOUT);
3180 			waddwstr(window, &wline[i]);
3181 			wattroff(window, A_STANDOUT);
3182 			wlimit -= (width1 - w);
3183 			*wtotal += (width1 - w);
3184 		}
3185 	}
3186 
3187 	if (wlimit > 0) {  /* draw rest of line */
3188 		free(wline);
3189 		if (skipcol > width0 + width1) {
3190 			err = format_line(&wline, &width2, &scrollx, seg2,
3191 			    skipcol - (width0 + width1), wlimit,
3192 			    col_tab_align, 1);
3193 			if (err)
3194 				goto done;
3195 			waddwstr(window, &wline[scrollx]);
3196 		} else {
3197 			err = format_line(&wline, &width2, NULL, seg2, 0,
3198 			    wlimit, col_tab_align, 1);
3199 			if (err)
3200 				goto done;
3201 			waddwstr(window, wline);
3202 		}
3203 		*wtotal += width2;
3204 	}
3205 done:
3206 	free(wline);
3207 	free(exstr);
3208 	free(seg0);
3209 	free(seg1);
3210 	free(seg2);
3211 	return err;
3212 }
3213 
3214 static const struct got_error *
3215 draw_file(struct tog_view *view, const char *header)
3216 {
3217 	struct tog_diff_view_state *s = &view->state.diff;
3218 	regmatch_t *regmatch = &view->regmatch;
3219 	const struct got_error *err;
3220 	int nprinted = 0;
3221 	char *line;
3222 	size_t linesize = 0;
3223 	ssize_t linelen;
3224 	struct tog_color *tc;
3225 	wchar_t *wline;
3226 	int width;
3227 	int max_lines = view->nlines;
3228 	int nlines = s->nlines;
3229 	off_t line_offset;
3230 
3231 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3232 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3233 		return got_error_from_errno("fseek");
3234 
3235 	werase(view->window);
3236 
3237 	if (header) {
3238 		if (asprintf(&line, "[%d/%d] %s",
3239 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3240 		    header) == -1)
3241 			return got_error_from_errno("asprintf");
3242 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3243 		    0, 0);
3244 		free(line);
3245 		if (err)
3246 			return err;
3247 
3248 		if (view_needs_focus_indication(view))
3249 			wstandout(view->window);
3250 		waddwstr(view->window, wline);
3251 		free(wline);
3252 		wline = NULL;
3253 		if (view_needs_focus_indication(view))
3254 			wstandend(view->window);
3255 		if (width <= view->ncols - 1)
3256 			waddch(view->window, '\n');
3257 
3258 		if (max_lines <= 1)
3259 			return NULL;
3260 		max_lines--;
3261 	}
3262 
3263 	s->eof = 0;
3264 	view->maxx = 0;
3265 	line = NULL;
3266 	while (max_lines > 0 && nprinted < max_lines) {
3267 		linelen = getline(&line, &linesize, s->f);
3268 		if (linelen == -1) {
3269 			if (feof(s->f)) {
3270 				s->eof = 1;
3271 				break;
3272 			}
3273 			free(line);
3274 			return got_ferror(s->f, GOT_ERR_IO);
3275 		}
3276 
3277 		/* Set view->maxx based on full line length. */
3278 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3279 		    view->x ? 1 : 0);
3280 		if (err) {
3281 			free(line);
3282 			return err;
3283 		}
3284 		view->maxx = MAX(view->maxx, width);
3285 		free(wline);
3286 		wline = NULL;
3287 
3288 		tc = match_color(&s->colors, line);
3289 		if (tc)
3290 			wattr_on(view->window,
3291 			    COLOR_PAIR(tc->colorpair), NULL);
3292 		if (s->first_displayed_line + nprinted == s->matched_line &&
3293 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3294 			err = add_matched_line(&width, line, view->ncols, 0,
3295 			    view->window, view->x, regmatch);
3296 			if (err) {
3297 				free(line);
3298 				return err;
3299 			}
3300 		} else {
3301 			int skip;
3302 			err = format_line(&wline, &width, &skip, line,
3303 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3304 			if (err) {
3305 				free(line);
3306 				return err;
3307 			}
3308 			waddwstr(view->window, &wline[skip]);
3309 			free(wline);
3310 			wline = NULL;
3311 		}
3312 		if (tc)
3313 			wattr_off(view->window,
3314 			    COLOR_PAIR(tc->colorpair), NULL);
3315 		if (width <= view->ncols - 1)
3316 			waddch(view->window, '\n');
3317 		nprinted++;
3318 	}
3319 	free(line);
3320 	if (nprinted >= 1)
3321 		s->last_displayed_line = s->first_displayed_line +
3322 		    (nprinted - 1);
3323 	else
3324 		s->last_displayed_line = s->first_displayed_line;
3325 
3326 	view_vborder(view);
3327 
3328 	if (s->eof) {
3329 		while (nprinted < view->nlines) {
3330 			waddch(view->window, '\n');
3331 			nprinted++;
3332 		}
3333 
3334 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3335 		    view->ncols, 0, 0);
3336 		if (err) {
3337 			return err;
3338 		}
3339 
3340 		wstandout(view->window);
3341 		waddwstr(view->window, wline);
3342 		free(wline);
3343 		wline = NULL;
3344 		wstandend(view->window);
3345 	}
3346 
3347 	return NULL;
3348 }
3349 
3350 static char *
3351 get_datestr(time_t *time, char *datebuf)
3352 {
3353 	struct tm mytm, *tm;
3354 	char *p, *s;
3355 
3356 	tm = gmtime_r(time, &mytm);
3357 	if (tm == NULL)
3358 		return NULL;
3359 	s = asctime_r(tm, datebuf);
3360 	if (s == NULL)
3361 		return NULL;
3362 	p = strchr(s, '\n');
3363 	if (p)
3364 		*p = '\0';
3365 	return s;
3366 }
3367 
3368 static const struct got_error *
3369 get_changed_paths(struct got_pathlist_head *paths,
3370     struct got_commit_object *commit, struct got_repository *repo)
3371 {
3372 	const struct got_error *err = NULL;
3373 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3374 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3375 	struct got_object_qid *qid;
3376 
3377 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3378 	if (qid != NULL) {
3379 		struct got_commit_object *pcommit;
3380 		err = got_object_open_as_commit(&pcommit, repo,
3381 		    &qid->id);
3382 		if (err)
3383 			return err;
3384 
3385 		tree_id1 = got_object_id_dup(
3386 		    got_object_commit_get_tree_id(pcommit));
3387 		if (tree_id1 == NULL) {
3388 			got_object_commit_close(pcommit);
3389 			return got_error_from_errno("got_object_id_dup");
3390 		}
3391 		got_object_commit_close(pcommit);
3392 
3393 	}
3394 
3395 	if (tree_id1) {
3396 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3397 		if (err)
3398 			goto done;
3399 	}
3400 
3401 	tree_id2 = got_object_commit_get_tree_id(commit);
3402 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3403 	if (err)
3404 		goto done;
3405 
3406 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3407 	    got_diff_tree_collect_changed_paths, paths, 0);
3408 done:
3409 	if (tree1)
3410 		got_object_tree_close(tree1);
3411 	if (tree2)
3412 		got_object_tree_close(tree2);
3413 	free(tree_id1);
3414 	return err;
3415 }
3416 
3417 static const struct got_error *
3418 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3419 {
3420 	off_t *p;
3421 
3422 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3423 	if (p == NULL)
3424 		return got_error_from_errno("reallocarray");
3425 	*line_offsets = p;
3426 	(*line_offsets)[*nlines] = off;
3427 	(*nlines)++;
3428 	return NULL;
3429 }
3430 
3431 static const struct got_error *
3432 write_commit_info(off_t **line_offsets, size_t *nlines,
3433     struct got_object_id *commit_id, struct got_reflist_head *refs,
3434     struct got_repository *repo, FILE *outfile)
3435 {
3436 	const struct got_error *err = NULL;
3437 	char datebuf[26], *datestr;
3438 	struct got_commit_object *commit;
3439 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3440 	time_t committer_time;
3441 	const char *author, *committer;
3442 	char *refs_str = NULL;
3443 	struct got_pathlist_head changed_paths;
3444 	struct got_pathlist_entry *pe;
3445 	off_t outoff = 0;
3446 	int n;
3447 
3448 	TAILQ_INIT(&changed_paths);
3449 
3450 	if (refs) {
3451 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3452 		if (err)
3453 			return err;
3454 	}
3455 
3456 	err = got_object_open_as_commit(&commit, repo, commit_id);
3457 	if (err)
3458 		return err;
3459 
3460 	err = got_object_id_str(&id_str, commit_id);
3461 	if (err) {
3462 		err = got_error_from_errno("got_object_id_str");
3463 		goto done;
3464 	}
3465 
3466 	err = add_line_offset(line_offsets, nlines, 0);
3467 	if (err)
3468 		goto done;
3469 
3470 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3471 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3472 	if (n < 0) {
3473 		err = got_error_from_errno("fprintf");
3474 		goto done;
3475 	}
3476 	outoff += n;
3477 	err = add_line_offset(line_offsets, nlines, outoff);
3478 	if (err)
3479 		goto done;
3480 
3481 	n = fprintf(outfile, "from: %s\n",
3482 	    got_object_commit_get_author(commit));
3483 	if (n < 0) {
3484 		err = got_error_from_errno("fprintf");
3485 		goto done;
3486 	}
3487 	outoff += n;
3488 	err = add_line_offset(line_offsets, nlines, outoff);
3489 	if (err)
3490 		goto done;
3491 
3492 	committer_time = got_object_commit_get_committer_time(commit);
3493 	datestr = get_datestr(&committer_time, datebuf);
3494 	if (datestr) {
3495 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3496 		if (n < 0) {
3497 			err = got_error_from_errno("fprintf");
3498 			goto done;
3499 		}
3500 		outoff += n;
3501 		err = add_line_offset(line_offsets, nlines, outoff);
3502 		if (err)
3503 			goto done;
3504 	}
3505 	author = got_object_commit_get_author(commit);
3506 	committer = got_object_commit_get_committer(commit);
3507 	if (strcmp(author, committer) != 0) {
3508 		n = fprintf(outfile, "via: %s\n", committer);
3509 		if (n < 0) {
3510 			err = got_error_from_errno("fprintf");
3511 			goto done;
3512 		}
3513 		outoff += n;
3514 		err = add_line_offset(line_offsets, nlines, outoff);
3515 		if (err)
3516 			goto done;
3517 	}
3518 	if (got_object_commit_get_nparents(commit) > 1) {
3519 		const struct got_object_id_queue *parent_ids;
3520 		struct got_object_qid *qid;
3521 		int pn = 1;
3522 		parent_ids = got_object_commit_get_parent_ids(commit);
3523 		STAILQ_FOREACH(qid, parent_ids, entry) {
3524 			err = got_object_id_str(&id_str, &qid->id);
3525 			if (err)
3526 				goto done;
3527 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3528 			if (n < 0) {
3529 				err = got_error_from_errno("fprintf");
3530 				goto done;
3531 			}
3532 			outoff += n;
3533 			err = add_line_offset(line_offsets, nlines, outoff);
3534 			if (err)
3535 				goto done;
3536 			free(id_str);
3537 			id_str = NULL;
3538 		}
3539 	}
3540 
3541 	err = got_object_commit_get_logmsg(&logmsg, commit);
3542 	if (err)
3543 		goto done;
3544 	s = logmsg;
3545 	while ((line = strsep(&s, "\n")) != NULL) {
3546 		n = fprintf(outfile, "%s\n", line);
3547 		if (n < 0) {
3548 			err = got_error_from_errno("fprintf");
3549 			goto done;
3550 		}
3551 		outoff += n;
3552 		err = add_line_offset(line_offsets, nlines, outoff);
3553 		if (err)
3554 			goto done;
3555 	}
3556 
3557 	err = get_changed_paths(&changed_paths, commit, repo);
3558 	if (err)
3559 		goto done;
3560 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3561 		struct got_diff_changed_path *cp = pe->data;
3562 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3563 		if (n < 0) {
3564 			err = got_error_from_errno("fprintf");
3565 			goto done;
3566 		}
3567 		outoff += n;
3568 		err = add_line_offset(line_offsets, nlines, outoff);
3569 		if (err)
3570 			goto done;
3571 		free((char *)pe->path);
3572 		free(pe->data);
3573 	}
3574 
3575 	fputc('\n', outfile);
3576 	outoff++;
3577 	err = add_line_offset(line_offsets, nlines, outoff);
3578 done:
3579 	got_pathlist_free(&changed_paths);
3580 	free(id_str);
3581 	free(logmsg);
3582 	free(refs_str);
3583 	got_object_commit_close(commit);
3584 	if (err) {
3585 		free(*line_offsets);
3586 		*line_offsets = NULL;
3587 		*nlines = 0;
3588 	}
3589 	return err;
3590 }
3591 
3592 static const struct got_error *
3593 create_diff(struct tog_diff_view_state *s)
3594 {
3595 	const struct got_error *err = NULL;
3596 	FILE *f = NULL;
3597 	int obj_type;
3598 
3599 	free(s->line_offsets);
3600 	s->line_offsets = malloc(sizeof(off_t));
3601 	if (s->line_offsets == NULL)
3602 		return got_error_from_errno("malloc");
3603 	s->nlines = 0;
3604 
3605 	f = got_opentemp();
3606 	if (f == NULL) {
3607 		err = got_error_from_errno("got_opentemp");
3608 		goto done;
3609 	}
3610 	if (s->f && fclose(s->f) == EOF) {
3611 		err = got_error_from_errno("fclose");
3612 		goto done;
3613 	}
3614 	s->f = f;
3615 
3616 	if (s->id1)
3617 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3618 	else
3619 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3620 	if (err)
3621 		goto done;
3622 
3623 	switch (obj_type) {
3624 	case GOT_OBJ_TYPE_BLOB:
3625 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3626 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3627 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3628 		    s->repo, s->f);
3629 		break;
3630 	case GOT_OBJ_TYPE_TREE:
3631 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3632 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3633 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3634 		break;
3635 	case GOT_OBJ_TYPE_COMMIT: {
3636 		const struct got_object_id_queue *parent_ids;
3637 		struct got_object_qid *pid;
3638 		struct got_commit_object *commit2;
3639 		struct got_reflist_head *refs;
3640 
3641 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3642 		if (err)
3643 			goto done;
3644 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3645 		/* Show commit info if we're diffing to a parent/root commit. */
3646 		if (s->id1 == NULL) {
3647 			err = write_commit_info(&s->line_offsets, &s->nlines,
3648 			    s->id2, refs, s->repo, s->f);
3649 			if (err)
3650 				goto done;
3651 		} else {
3652 			parent_ids = got_object_commit_get_parent_ids(commit2);
3653 			STAILQ_FOREACH(pid, parent_ids, entry) {
3654 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3655 					err = write_commit_info(
3656 					    &s->line_offsets, &s->nlines,
3657 					    s->id2, refs, s->repo, s->f);
3658 					if (err)
3659 						goto done;
3660 					break;
3661 				}
3662 			}
3663 		}
3664 		got_object_commit_close(commit2);
3665 
3666 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3667 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3668 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3669 		break;
3670 	}
3671 	default:
3672 		err = got_error(GOT_ERR_OBJ_TYPE);
3673 		break;
3674 	}
3675 	if (err)
3676 		goto done;
3677 done:
3678 	if (s->f && fflush(s->f) != 0 && err == NULL)
3679 		err = got_error_from_errno("fflush");
3680 	return err;
3681 }
3682 
3683 static void
3684 diff_view_indicate_progress(struct tog_view *view)
3685 {
3686 	mvwaddstr(view->window, 0, 0, "diffing...");
3687 	update_panels();
3688 	doupdate();
3689 }
3690 
3691 static const struct got_error *
3692 search_start_diff_view(struct tog_view *view)
3693 {
3694 	struct tog_diff_view_state *s = &view->state.diff;
3695 
3696 	s->matched_line = 0;
3697 	return NULL;
3698 }
3699 
3700 static const struct got_error *
3701 search_next_diff_view(struct tog_view *view)
3702 {
3703 	struct tog_diff_view_state *s = &view->state.diff;
3704 	const struct got_error *err = NULL;
3705 	int lineno;
3706 	char *line = NULL;
3707 	size_t linesize = 0;
3708 	ssize_t linelen;
3709 
3710 	if (!view->searching) {
3711 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3712 		return NULL;
3713 	}
3714 
3715 	if (s->matched_line) {
3716 		if (view->searching == TOG_SEARCH_FORWARD)
3717 			lineno = s->matched_line + 1;
3718 		else
3719 			lineno = s->matched_line - 1;
3720 	} else
3721 		lineno = s->first_displayed_line;
3722 
3723 	while (1) {
3724 		off_t offset;
3725 
3726 		if (lineno <= 0 || lineno > s->nlines) {
3727 			if (s->matched_line == 0) {
3728 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3729 				break;
3730 			}
3731 
3732 			if (view->searching == TOG_SEARCH_FORWARD)
3733 				lineno = 1;
3734 			else
3735 				lineno = s->nlines;
3736 		}
3737 
3738 		offset = s->line_offsets[lineno - 1];
3739 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3740 			free(line);
3741 			return got_error_from_errno("fseeko");
3742 		}
3743 		linelen = getline(&line, &linesize, s->f);
3744 		if (linelen != -1) {
3745 			char *exstr;
3746 			err = expand_tab(&exstr, line);
3747 			if (err)
3748 				break;
3749 			if (match_line(exstr, &view->regex, 1,
3750 			    &view->regmatch)) {
3751 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3752 				s->matched_line = lineno;
3753 				free(exstr);
3754 				break;
3755 			}
3756 			free(exstr);
3757 		}
3758 		if (view->searching == TOG_SEARCH_FORWARD)
3759 			lineno++;
3760 		else
3761 			lineno--;
3762 	}
3763 	free(line);
3764 
3765 	if (s->matched_line) {
3766 		s->first_displayed_line = s->matched_line;
3767 		s->selected_line = 1;
3768 	}
3769 
3770 	return err;
3771 }
3772 
3773 static const struct got_error *
3774 close_diff_view(struct tog_view *view)
3775 {
3776 	const struct got_error *err = NULL;
3777 	struct tog_diff_view_state *s = &view->state.diff;
3778 
3779 	free(s->id1);
3780 	s->id1 = NULL;
3781 	free(s->id2);
3782 	s->id2 = NULL;
3783 	if (s->f && fclose(s->f) == EOF)
3784 		err = got_error_from_errno("fclose");
3785 	s->f = NULL;
3786 	if (s->f1 && fclose(s->f1) == EOF)
3787 		err = got_error_from_errno("fclose");
3788 	s->f1 = NULL;
3789 	if (s->f2 && fclose(s->f2) == EOF)
3790 		err = got_error_from_errno("fclose");
3791 	s->f2 = NULL;
3792 	free_colors(&s->colors);
3793 	free(s->line_offsets);
3794 	s->line_offsets = NULL;
3795 	s->nlines = 0;
3796 	return err;
3797 }
3798 
3799 static const struct got_error *
3800 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3801     struct got_object_id *id2, const char *label1, const char *label2,
3802     int diff_context, int ignore_whitespace, int force_text_diff,
3803     struct tog_view *log_view, struct got_repository *repo)
3804 {
3805 	const struct got_error *err;
3806 	struct tog_diff_view_state *s = &view->state.diff;
3807 
3808 	memset(s, 0, sizeof(*s));
3809 
3810 	if (id1 != NULL && id2 != NULL) {
3811 	    int type1, type2;
3812 	    err = got_object_get_type(&type1, repo, id1);
3813 	    if (err)
3814 		return err;
3815 	    err = got_object_get_type(&type2, repo, id2);
3816 	    if (err)
3817 		return err;
3818 
3819 	    if (type1 != type2)
3820 		return got_error(GOT_ERR_OBJ_TYPE);
3821 	}
3822 	s->first_displayed_line = 1;
3823 	s->last_displayed_line = view->nlines;
3824 	s->selected_line = 1;
3825 	s->repo = repo;
3826 	s->id1 = id1;
3827 	s->id2 = id2;
3828 	s->label1 = label1;
3829 	s->label2 = label2;
3830 
3831 	if (id1) {
3832 		s->id1 = got_object_id_dup(id1);
3833 		if (s->id1 == NULL)
3834 			return got_error_from_errno("got_object_id_dup");
3835 	} else
3836 		s->id1 = NULL;
3837 
3838 	s->id2 = got_object_id_dup(id2);
3839 	if (s->id2 == NULL) {
3840 		err = got_error_from_errno("got_object_id_dup");
3841 		goto done;
3842 	}
3843 
3844 	s->f1 = got_opentemp();
3845 	if (s->f1 == NULL) {
3846 		err = got_error_from_errno("got_opentemp");
3847 		goto done;
3848 	}
3849 
3850 	s->f2 = got_opentemp();
3851 	if (s->f2 == NULL) {
3852 		err = got_error_from_errno("got_opentemp");
3853 		goto done;
3854 	}
3855 
3856 	s->first_displayed_line = 1;
3857 	s->last_displayed_line = view->nlines;
3858 	s->diff_context = diff_context;
3859 	s->ignore_whitespace = ignore_whitespace;
3860 	s->force_text_diff = force_text_diff;
3861 	s->log_view = log_view;
3862 	s->repo = repo;
3863 
3864 	STAILQ_INIT(&s->colors);
3865 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3866 		err = add_color(&s->colors,
3867 		    "^-", TOG_COLOR_DIFF_MINUS,
3868 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3869 		if (err)
3870 			goto done;
3871 		err = add_color(&s->colors, "^\\+",
3872 		    TOG_COLOR_DIFF_PLUS,
3873 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3874 		if (err)
3875 			goto done;
3876 		err = add_color(&s->colors,
3877 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3878 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3879 		if (err)
3880 			goto done;
3881 
3882 		err = add_color(&s->colors,
3883 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3884 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3885 		    get_color_value("TOG_COLOR_DIFF_META"));
3886 		if (err)
3887 			goto done;
3888 
3889 		err = add_color(&s->colors,
3890 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3891 		    get_color_value("TOG_COLOR_AUTHOR"));
3892 		if (err)
3893 			goto done;
3894 
3895 		err = add_color(&s->colors,
3896 		    "^date: ", TOG_COLOR_DATE,
3897 		    get_color_value("TOG_COLOR_DATE"));
3898 		if (err)
3899 			goto done;
3900 	}
3901 
3902 	if (log_view && view_is_splitscreen(view))
3903 		show_log_view(log_view); /* draw vborder */
3904 	diff_view_indicate_progress(view);
3905 
3906 	err = create_diff(s);
3907 
3908 	view->show = show_diff_view;
3909 	view->input = input_diff_view;
3910 	view->close = close_diff_view;
3911 	view->search_start = search_start_diff_view;
3912 	view->search_next = search_next_diff_view;
3913 done:
3914 	if (err)
3915 		close_diff_view(view);
3916 	return err;
3917 }
3918 
3919 static const struct got_error *
3920 show_diff_view(struct tog_view *view)
3921 {
3922 	const struct got_error *err;
3923 	struct tog_diff_view_state *s = &view->state.diff;
3924 	char *id_str1 = NULL, *id_str2, *header;
3925 	const char *label1, *label2;
3926 
3927 	if (s->id1) {
3928 		err = got_object_id_str(&id_str1, s->id1);
3929 		if (err)
3930 			return err;
3931 		label1 = s->label1 ? : id_str1;
3932 	} else
3933 		label1 = "/dev/null";
3934 
3935 	err = got_object_id_str(&id_str2, s->id2);
3936 	if (err)
3937 		return err;
3938 	label2 = s->label2 ? : id_str2;
3939 
3940 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3941 		err = got_error_from_errno("asprintf");
3942 		free(id_str1);
3943 		free(id_str2);
3944 		return err;
3945 	}
3946 	free(id_str1);
3947 	free(id_str2);
3948 
3949 	err = draw_file(view, header);
3950 	free(header);
3951 	return err;
3952 }
3953 
3954 static const struct got_error *
3955 set_selected_commit(struct tog_diff_view_state *s,
3956     struct commit_queue_entry *entry)
3957 {
3958 	const struct got_error *err;
3959 	const struct got_object_id_queue *parent_ids;
3960 	struct got_commit_object *selected_commit;
3961 	struct got_object_qid *pid;
3962 
3963 	free(s->id2);
3964 	s->id2 = got_object_id_dup(entry->id);
3965 	if (s->id2 == NULL)
3966 		return got_error_from_errno("got_object_id_dup");
3967 
3968 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3969 	if (err)
3970 		return err;
3971 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3972 	free(s->id1);
3973 	pid = STAILQ_FIRST(parent_ids);
3974 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3975 	got_object_commit_close(selected_commit);
3976 	return NULL;
3977 }
3978 
3979 static const struct got_error *
3980 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3981 {
3982 	const struct got_error *err = NULL;
3983 	struct tog_diff_view_state *s = &view->state.diff;
3984 	struct tog_log_view_state *ls;
3985 	struct commit_queue_entry *old_selected_entry;
3986 	char *line = NULL;
3987 	size_t linesize = 0;
3988 	ssize_t linelen;
3989 	int i, nscroll = view->nlines - 1;
3990 
3991 	switch (ch) {
3992 	case '0':
3993 		view->x = 0;
3994 		break;
3995 	case '$':
3996 		view->x = MAX(view->maxx - view->ncols / 3, 0);
3997 		break;
3998 	case KEY_RIGHT:
3999 	case 'l':
4000 		if (view->x + view->ncols / 3 < view->maxx)
4001 			view->x += 2;  /* move two columns right */
4002 		break;
4003 	case KEY_LEFT:
4004 	case 'h':
4005 		view->x -= MIN(view->x, 2);  /* move two columns back */
4006 		break;
4007 	case 'a':
4008 	case 'w':
4009 		if (ch == 'a')
4010 			s->force_text_diff = !s->force_text_diff;
4011 		if (ch == 'w')
4012 			s->ignore_whitespace = !s->ignore_whitespace;
4013 		wclear(view->window);
4014 		s->first_displayed_line = 1;
4015 		s->last_displayed_line = view->nlines;
4016 		s->matched_line = 0;
4017 		diff_view_indicate_progress(view);
4018 		err = create_diff(s);
4019 		break;
4020 	case 'g':
4021 	case KEY_HOME:
4022 		s->first_displayed_line = 1;
4023 		break;
4024 	case 'G':
4025 	case KEY_END:
4026 		if (s->eof)
4027 			break;
4028 
4029 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4030 		s->eof = 1;
4031 		break;
4032 	case 'k':
4033 	case KEY_UP:
4034 	case CTRL('p'):
4035 		if (s->first_displayed_line > 1)
4036 			s->first_displayed_line--;
4037 		break;
4038 	case CTRL('u'):
4039 	case 'u':
4040 		nscroll /= 2;
4041 		/* FALL THROUGH */
4042 	case KEY_PPAGE:
4043 	case CTRL('b'):
4044 		if (s->first_displayed_line == 1)
4045 			break;
4046 		i = 0;
4047 		while (i++ < nscroll && s->first_displayed_line > 1)
4048 			s->first_displayed_line--;
4049 		break;
4050 	case 'j':
4051 	case KEY_DOWN:
4052 	case CTRL('n'):
4053 		if (!s->eof)
4054 			s->first_displayed_line++;
4055 		break;
4056 	case CTRL('d'):
4057 	case 'd':
4058 		nscroll /= 2;
4059 		/* FALL THROUGH */
4060 	case KEY_NPAGE:
4061 	case CTRL('f'):
4062 	case ' ':
4063 		if (s->eof)
4064 			break;
4065 		i = 0;
4066 		while (!s->eof && i++ < nscroll) {
4067 			linelen = getline(&line, &linesize, s->f);
4068 			s->first_displayed_line++;
4069 			if (linelen == -1) {
4070 				if (feof(s->f)) {
4071 					s->eof = 1;
4072 				} else
4073 					err = got_ferror(s->f, GOT_ERR_IO);
4074 				break;
4075 			}
4076 		}
4077 		free(line);
4078 		break;
4079 	case '[':
4080 		if (s->diff_context > 0) {
4081 			s->diff_context--;
4082 			s->matched_line = 0;
4083 			diff_view_indicate_progress(view);
4084 			err = create_diff(s);
4085 			if (s->first_displayed_line + view->nlines - 1 >
4086 			    s->nlines) {
4087 				s->first_displayed_line = 1;
4088 				s->last_displayed_line = view->nlines;
4089 			}
4090 		}
4091 		break;
4092 	case ']':
4093 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4094 			s->diff_context++;
4095 			s->matched_line = 0;
4096 			diff_view_indicate_progress(view);
4097 			err = create_diff(s);
4098 		}
4099 		break;
4100 	case '<':
4101 	case ',':
4102 		if (s->log_view == NULL)
4103 			break;
4104 		ls = &s->log_view->state.log;
4105 		old_selected_entry = ls->selected_entry;
4106 
4107 		err = input_log_view(NULL, s->log_view, KEY_UP);
4108 		if (err)
4109 			break;
4110 
4111 		if (old_selected_entry == ls->selected_entry)
4112 			break;
4113 
4114 		err = set_selected_commit(s, ls->selected_entry);
4115 		if (err)
4116 			break;
4117 
4118 		s->first_displayed_line = 1;
4119 		s->last_displayed_line = view->nlines;
4120 		s->matched_line = 0;
4121 		view->x = 0;
4122 
4123 		diff_view_indicate_progress(view);
4124 		err = create_diff(s);
4125 		break;
4126 	case '>':
4127 	case '.':
4128 		if (s->log_view == NULL)
4129 			break;
4130 		ls = &s->log_view->state.log;
4131 		old_selected_entry = ls->selected_entry;
4132 
4133 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4134 		if (err)
4135 			break;
4136 
4137 		if (old_selected_entry == ls->selected_entry)
4138 			break;
4139 
4140 		err = set_selected_commit(s, ls->selected_entry);
4141 		if (err)
4142 			break;
4143 
4144 		s->first_displayed_line = 1;
4145 		s->last_displayed_line = view->nlines;
4146 		s->matched_line = 0;
4147 		view->x = 0;
4148 
4149 		diff_view_indicate_progress(view);
4150 		err = create_diff(s);
4151 		break;
4152 	default:
4153 		break;
4154 	}
4155 
4156 	return err;
4157 }
4158 
4159 static const struct got_error *
4160 cmd_diff(int argc, char *argv[])
4161 {
4162 	const struct got_error *error = NULL;
4163 	struct got_repository *repo = NULL;
4164 	struct got_worktree *worktree = NULL;
4165 	struct got_object_id *id1 = NULL, *id2 = NULL;
4166 	char *repo_path = NULL, *cwd = NULL;
4167 	char *id_str1 = NULL, *id_str2 = NULL;
4168 	char *label1 = NULL, *label2 = NULL;
4169 	int diff_context = 3, ignore_whitespace = 0;
4170 	int ch, force_text_diff = 0;
4171 	const char *errstr;
4172 	struct tog_view *view;
4173 	int *pack_fds = NULL;
4174 
4175 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4176 		switch (ch) {
4177 		case 'a':
4178 			force_text_diff = 1;
4179 			break;
4180 		case 'C':
4181 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4182 			    &errstr);
4183 			if (errstr != NULL)
4184 				errx(1, "number of context lines is %s: %s",
4185 				    errstr, errstr);
4186 			break;
4187 		case 'r':
4188 			repo_path = realpath(optarg, NULL);
4189 			if (repo_path == NULL)
4190 				return got_error_from_errno2("realpath",
4191 				    optarg);
4192 			got_path_strip_trailing_slashes(repo_path);
4193 			break;
4194 		case 'w':
4195 			ignore_whitespace = 1;
4196 			break;
4197 		default:
4198 			usage_diff();
4199 			/* NOTREACHED */
4200 		}
4201 	}
4202 
4203 	argc -= optind;
4204 	argv += optind;
4205 
4206 	if (argc == 0) {
4207 		usage_diff(); /* TODO show local worktree changes */
4208 	} else if (argc == 2) {
4209 		id_str1 = argv[0];
4210 		id_str2 = argv[1];
4211 	} else
4212 		usage_diff();
4213 
4214 	error = got_repo_pack_fds_open(&pack_fds);
4215 	if (error)
4216 		goto done;
4217 
4218 	if (repo_path == NULL) {
4219 		cwd = getcwd(NULL, 0);
4220 		if (cwd == NULL)
4221 			return got_error_from_errno("getcwd");
4222 		error = got_worktree_open(&worktree, cwd);
4223 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4224 			goto done;
4225 		if (worktree)
4226 			repo_path =
4227 			    strdup(got_worktree_get_repo_path(worktree));
4228 		else
4229 			repo_path = strdup(cwd);
4230 		if (repo_path == NULL) {
4231 			error = got_error_from_errno("strdup");
4232 			goto done;
4233 		}
4234 	}
4235 
4236 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4237 	if (error)
4238 		goto done;
4239 
4240 	init_curses();
4241 
4242 	error = apply_unveil(got_repo_get_path(repo), NULL);
4243 	if (error)
4244 		goto done;
4245 
4246 	error = tog_load_refs(repo, 0);
4247 	if (error)
4248 		goto done;
4249 
4250 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4251 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4252 	if (error)
4253 		goto done;
4254 
4255 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4256 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4257 	if (error)
4258 		goto done;
4259 
4260 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4261 	if (view == NULL) {
4262 		error = got_error_from_errno("view_open");
4263 		goto done;
4264 	}
4265 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4266 	    ignore_whitespace, force_text_diff, NULL,  repo);
4267 	if (error)
4268 		goto done;
4269 	error = view_loop(view);
4270 done:
4271 	free(label1);
4272 	free(label2);
4273 	free(repo_path);
4274 	free(cwd);
4275 	if (repo) {
4276 		const struct got_error *close_err = got_repo_close(repo);
4277 		if (error == NULL)
4278 			error = close_err;
4279 	}
4280 	if (worktree)
4281 		got_worktree_close(worktree);
4282 	if (pack_fds) {
4283 		const struct got_error *pack_err =
4284 		    got_repo_pack_fds_close(pack_fds);
4285 		if (error == NULL)
4286 			error = pack_err;
4287 	}
4288 	tog_free_refs();
4289 	return error;
4290 }
4291 
4292 __dead static void
4293 usage_blame(void)
4294 {
4295 	endwin();
4296 	fprintf(stderr,
4297 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4298 	    getprogname());
4299 	exit(1);
4300 }
4301 
4302 struct tog_blame_line {
4303 	int annotated;
4304 	struct got_object_id *id;
4305 };
4306 
4307 static const struct got_error *
4308 draw_blame(struct tog_view *view)
4309 {
4310 	struct tog_blame_view_state *s = &view->state.blame;
4311 	struct tog_blame *blame = &s->blame;
4312 	regmatch_t *regmatch = &view->regmatch;
4313 	const struct got_error *err;
4314 	int lineno = 0, nprinted = 0;
4315 	char *line = NULL;
4316 	size_t linesize = 0;
4317 	ssize_t linelen;
4318 	wchar_t *wline;
4319 	int width;
4320 	struct tog_blame_line *blame_line;
4321 	struct got_object_id *prev_id = NULL;
4322 	char *id_str;
4323 	struct tog_color *tc;
4324 
4325 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4326 	if (err)
4327 		return err;
4328 
4329 	rewind(blame->f);
4330 	werase(view->window);
4331 
4332 	if (asprintf(&line, "commit %s", id_str) == -1) {
4333 		err = got_error_from_errno("asprintf");
4334 		free(id_str);
4335 		return err;
4336 	}
4337 
4338 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4339 	free(line);
4340 	line = NULL;
4341 	if (err)
4342 		return err;
4343 	if (view_needs_focus_indication(view))
4344 		wstandout(view->window);
4345 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4346 	if (tc)
4347 		wattr_on(view->window,
4348 		    COLOR_PAIR(tc->colorpair), NULL);
4349 	waddwstr(view->window, wline);
4350 	if (tc)
4351 		wattr_off(view->window,
4352 		    COLOR_PAIR(tc->colorpair), NULL);
4353 	if (view_needs_focus_indication(view))
4354 		wstandend(view->window);
4355 	free(wline);
4356 	wline = NULL;
4357 	if (width < view->ncols - 1)
4358 		waddch(view->window, '\n');
4359 
4360 	if (asprintf(&line, "[%d/%d] %s%s",
4361 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4362 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4363 		free(id_str);
4364 		return got_error_from_errno("asprintf");
4365 	}
4366 	free(id_str);
4367 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4368 	free(line);
4369 	line = NULL;
4370 	if (err)
4371 		return err;
4372 	waddwstr(view->window, wline);
4373 	free(wline);
4374 	wline = NULL;
4375 	if (width < view->ncols - 1)
4376 		waddch(view->window, '\n');
4377 
4378 	s->eof = 0;
4379 	view->maxx = 0;
4380 	while (nprinted < view->nlines - 2) {
4381 		linelen = getline(&line, &linesize, blame->f);
4382 		if (linelen == -1) {
4383 			if (feof(blame->f)) {
4384 				s->eof = 1;
4385 				break;
4386 			}
4387 			free(line);
4388 			return got_ferror(blame->f, GOT_ERR_IO);
4389 		}
4390 		if (++lineno < s->first_displayed_line)
4391 			continue;
4392 
4393 		/* Set view->maxx based on full line length. */
4394 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4395 		if (err) {
4396 			free(line);
4397 			return err;
4398 		}
4399 		free(wline);
4400 		wline = NULL;
4401 		view->maxx = MAX(view->maxx, width);
4402 
4403 		if (view->focussed && nprinted == s->selected_line - 1)
4404 			wstandout(view->window);
4405 
4406 		if (blame->nlines > 0) {
4407 			blame_line = &blame->lines[lineno - 1];
4408 			if (blame_line->annotated && prev_id &&
4409 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4410 			    !(view->focussed &&
4411 			    nprinted == s->selected_line - 1)) {
4412 				waddstr(view->window, "        ");
4413 			} else if (blame_line->annotated) {
4414 				char *id_str;
4415 				err = got_object_id_str(&id_str,
4416 				    blame_line->id);
4417 				if (err) {
4418 					free(line);
4419 					return err;
4420 				}
4421 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4422 				if (tc)
4423 					wattr_on(view->window,
4424 					    COLOR_PAIR(tc->colorpair), NULL);
4425 				wprintw(view->window, "%.8s", id_str);
4426 				if (tc)
4427 					wattr_off(view->window,
4428 					    COLOR_PAIR(tc->colorpair), NULL);
4429 				free(id_str);
4430 				prev_id = blame_line->id;
4431 			} else {
4432 				waddstr(view->window, "........");
4433 				prev_id = NULL;
4434 			}
4435 		} else {
4436 			waddstr(view->window, "........");
4437 			prev_id = NULL;
4438 		}
4439 
4440 		if (view->focussed && nprinted == s->selected_line - 1)
4441 			wstandend(view->window);
4442 		waddstr(view->window, " ");
4443 
4444 		if (view->ncols <= 9) {
4445 			width = 9;
4446 		} else if (s->first_displayed_line + nprinted ==
4447 		    s->matched_line &&
4448 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4449 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4450 			    view->window, view->x, regmatch);
4451 			if (err) {
4452 				free(line);
4453 				return err;
4454 			}
4455 			width += 9;
4456 		} else {
4457 			int skip;
4458 			err = format_line(&wline, &width, &skip, line,
4459 			    view->x, view->ncols - 9, 9, 1);
4460 			if (err) {
4461 				free(line);
4462 				return err;
4463 			}
4464 			waddwstr(view->window, &wline[skip]);
4465 			width += 9;
4466 			free(wline);
4467 			wline = NULL;
4468 		}
4469 
4470 		if (width <= view->ncols - 1)
4471 			waddch(view->window, '\n');
4472 		if (++nprinted == 1)
4473 			s->first_displayed_line = lineno;
4474 	}
4475 	free(line);
4476 	s->last_displayed_line = lineno;
4477 
4478 	view_vborder(view);
4479 
4480 	return NULL;
4481 }
4482 
4483 static const struct got_error *
4484 blame_cb(void *arg, int nlines, int lineno,
4485     struct got_commit_object *commit, struct got_object_id *id)
4486 {
4487 	const struct got_error *err = NULL;
4488 	struct tog_blame_cb_args *a = arg;
4489 	struct tog_blame_line *line;
4490 	int errcode;
4491 
4492 	if (nlines != a->nlines ||
4493 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4494 		return got_error(GOT_ERR_RANGE);
4495 
4496 	errcode = pthread_mutex_lock(&tog_mutex);
4497 	if (errcode)
4498 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4499 
4500 	if (*a->quit) {	/* user has quit the blame view */
4501 		err = got_error(GOT_ERR_ITER_COMPLETED);
4502 		goto done;
4503 	}
4504 
4505 	if (lineno == -1)
4506 		goto done; /* no change in this commit */
4507 
4508 	line = &a->lines[lineno - 1];
4509 	if (line->annotated)
4510 		goto done;
4511 
4512 	line->id = got_object_id_dup(id);
4513 	if (line->id == NULL) {
4514 		err = got_error_from_errno("got_object_id_dup");
4515 		goto done;
4516 	}
4517 	line->annotated = 1;
4518 done:
4519 	errcode = pthread_mutex_unlock(&tog_mutex);
4520 	if (errcode)
4521 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4522 	return err;
4523 }
4524 
4525 static void *
4526 blame_thread(void *arg)
4527 {
4528 	const struct got_error *err, *close_err;
4529 	struct tog_blame_thread_args *ta = arg;
4530 	struct tog_blame_cb_args *a = ta->cb_args;
4531 	int errcode;
4532 
4533 	err = block_signals_used_by_main_thread();
4534 	if (err)
4535 		return (void *)err;
4536 
4537 	err = got_blame(ta->path, a->commit_id, ta->repo,
4538 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4539 	if (err && err->code == GOT_ERR_CANCELLED)
4540 		err = NULL;
4541 
4542 	errcode = pthread_mutex_lock(&tog_mutex);
4543 	if (errcode)
4544 		return (void *)got_error_set_errno(errcode,
4545 		    "pthread_mutex_lock");
4546 
4547 	close_err = got_repo_close(ta->repo);
4548 	if (err == NULL)
4549 		err = close_err;
4550 	ta->repo = NULL;
4551 	*ta->complete = 1;
4552 
4553 	errcode = pthread_mutex_unlock(&tog_mutex);
4554 	if (errcode && err == NULL)
4555 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4556 
4557 	return (void *)err;
4558 }
4559 
4560 static struct got_object_id *
4561 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4562     int first_displayed_line, int selected_line)
4563 {
4564 	struct tog_blame_line *line;
4565 
4566 	if (nlines <= 0)
4567 		return NULL;
4568 
4569 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4570 	if (!line->annotated)
4571 		return NULL;
4572 
4573 	return line->id;
4574 }
4575 
4576 static const struct got_error *
4577 stop_blame(struct tog_blame *blame)
4578 {
4579 	const struct got_error *err = NULL;
4580 	int i;
4581 
4582 	if (blame->thread) {
4583 		int errcode;
4584 		errcode = pthread_mutex_unlock(&tog_mutex);
4585 		if (errcode)
4586 			return got_error_set_errno(errcode,
4587 			    "pthread_mutex_unlock");
4588 		errcode = pthread_join(blame->thread, (void **)&err);
4589 		if (errcode)
4590 			return got_error_set_errno(errcode, "pthread_join");
4591 		errcode = pthread_mutex_lock(&tog_mutex);
4592 		if (errcode)
4593 			return got_error_set_errno(errcode,
4594 			    "pthread_mutex_lock");
4595 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4596 			err = NULL;
4597 		blame->thread = NULL;
4598 	}
4599 	if (blame->thread_args.repo) {
4600 		const struct got_error *close_err;
4601 		close_err = got_repo_close(blame->thread_args.repo);
4602 		if (err == NULL)
4603 			err = close_err;
4604 		blame->thread_args.repo = NULL;
4605 	}
4606 	if (blame->f) {
4607 		if (fclose(blame->f) == EOF && err == NULL)
4608 			err = got_error_from_errno("fclose");
4609 		blame->f = NULL;
4610 	}
4611 	if (blame->lines) {
4612 		for (i = 0; i < blame->nlines; i++)
4613 			free(blame->lines[i].id);
4614 		free(blame->lines);
4615 		blame->lines = NULL;
4616 	}
4617 	free(blame->cb_args.commit_id);
4618 	blame->cb_args.commit_id = NULL;
4619 	if (blame->pack_fds) {
4620 		const struct got_error *pack_err =
4621 		    got_repo_pack_fds_close(blame->pack_fds);
4622 		if (err == NULL)
4623 			err = pack_err;
4624 		blame->pack_fds = NULL;
4625 	}
4626 	return err;
4627 }
4628 
4629 static const struct got_error *
4630 cancel_blame_view(void *arg)
4631 {
4632 	const struct got_error *err = NULL;
4633 	int *done = arg;
4634 	int errcode;
4635 
4636 	errcode = pthread_mutex_lock(&tog_mutex);
4637 	if (errcode)
4638 		return got_error_set_errno(errcode,
4639 		    "pthread_mutex_unlock");
4640 
4641 	if (*done)
4642 		err = got_error(GOT_ERR_CANCELLED);
4643 
4644 	errcode = pthread_mutex_unlock(&tog_mutex);
4645 	if (errcode)
4646 		return got_error_set_errno(errcode,
4647 		    "pthread_mutex_lock");
4648 
4649 	return err;
4650 }
4651 
4652 static const struct got_error *
4653 run_blame(struct tog_view *view)
4654 {
4655 	struct tog_blame_view_state *s = &view->state.blame;
4656 	struct tog_blame *blame = &s->blame;
4657 	const struct got_error *err = NULL;
4658 	struct got_commit_object *commit = NULL;
4659 	struct got_blob_object *blob = NULL;
4660 	struct got_repository *thread_repo = NULL;
4661 	struct got_object_id *obj_id = NULL;
4662 	int obj_type;
4663 	int *pack_fds = NULL;
4664 
4665 	err = got_object_open_as_commit(&commit, s->repo,
4666 	    &s->blamed_commit->id);
4667 	if (err)
4668 		return err;
4669 
4670 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4671 	if (err)
4672 		goto done;
4673 
4674 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4675 	if (err)
4676 		goto done;
4677 
4678 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4679 		err = got_error(GOT_ERR_OBJ_TYPE);
4680 		goto done;
4681 	}
4682 
4683 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4684 	if (err)
4685 		goto done;
4686 	blame->f = got_opentemp();
4687 	if (blame->f == NULL) {
4688 		err = got_error_from_errno("got_opentemp");
4689 		goto done;
4690 	}
4691 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4692 	    &blame->line_offsets, blame->f, blob);
4693 	if (err)
4694 		goto done;
4695 	if (blame->nlines == 0) {
4696 		s->blame_complete = 1;
4697 		goto done;
4698 	}
4699 
4700 	/* Don't include \n at EOF in the blame line count. */
4701 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4702 		blame->nlines--;
4703 
4704 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4705 	if (blame->lines == NULL) {
4706 		err = got_error_from_errno("calloc");
4707 		goto done;
4708 	}
4709 
4710 	err = got_repo_pack_fds_open(&pack_fds);
4711 	if (err)
4712 		goto done;
4713 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4714 	    pack_fds);
4715 	if (err)
4716 		goto done;
4717 
4718 	blame->pack_fds = pack_fds;
4719 	blame->cb_args.view = view;
4720 	blame->cb_args.lines = blame->lines;
4721 	blame->cb_args.nlines = blame->nlines;
4722 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4723 	if (blame->cb_args.commit_id == NULL) {
4724 		err = got_error_from_errno("got_object_id_dup");
4725 		goto done;
4726 	}
4727 	blame->cb_args.quit = &s->done;
4728 
4729 	blame->thread_args.path = s->path;
4730 	blame->thread_args.repo = thread_repo;
4731 	blame->thread_args.cb_args = &blame->cb_args;
4732 	blame->thread_args.complete = &s->blame_complete;
4733 	blame->thread_args.cancel_cb = cancel_blame_view;
4734 	blame->thread_args.cancel_arg = &s->done;
4735 	s->blame_complete = 0;
4736 
4737 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4738 		s->first_displayed_line = 1;
4739 		s->last_displayed_line = view->nlines;
4740 		s->selected_line = 1;
4741 	}
4742 	s->matched_line = 0;
4743 
4744 done:
4745 	if (commit)
4746 		got_object_commit_close(commit);
4747 	if (blob)
4748 		got_object_blob_close(blob);
4749 	free(obj_id);
4750 	if (err)
4751 		stop_blame(blame);
4752 	return err;
4753 }
4754 
4755 static const struct got_error *
4756 open_blame_view(struct tog_view *view, char *path,
4757     struct got_object_id *commit_id, struct got_repository *repo)
4758 {
4759 	const struct got_error *err = NULL;
4760 	struct tog_blame_view_state *s = &view->state.blame;
4761 
4762 	STAILQ_INIT(&s->blamed_commits);
4763 
4764 	s->path = strdup(path);
4765 	if (s->path == NULL)
4766 		return got_error_from_errno("strdup");
4767 
4768 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4769 	if (err) {
4770 		free(s->path);
4771 		return err;
4772 	}
4773 
4774 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4775 	s->first_displayed_line = 1;
4776 	s->last_displayed_line = view->nlines;
4777 	s->selected_line = 1;
4778 	s->blame_complete = 0;
4779 	s->repo = repo;
4780 	s->commit_id = commit_id;
4781 	memset(&s->blame, 0, sizeof(s->blame));
4782 
4783 	STAILQ_INIT(&s->colors);
4784 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4785 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4786 		    get_color_value("TOG_COLOR_COMMIT"));
4787 		if (err)
4788 			return err;
4789 	}
4790 
4791 	view->show = show_blame_view;
4792 	view->input = input_blame_view;
4793 	view->close = close_blame_view;
4794 	view->search_start = search_start_blame_view;
4795 	view->search_next = search_next_blame_view;
4796 
4797 	return run_blame(view);
4798 }
4799 
4800 static const struct got_error *
4801 close_blame_view(struct tog_view *view)
4802 {
4803 	const struct got_error *err = NULL;
4804 	struct tog_blame_view_state *s = &view->state.blame;
4805 
4806 	if (s->blame.thread)
4807 		err = stop_blame(&s->blame);
4808 
4809 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4810 		struct got_object_qid *blamed_commit;
4811 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4812 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4813 		got_object_qid_free(blamed_commit);
4814 	}
4815 
4816 	free(s->path);
4817 	free_colors(&s->colors);
4818 	return err;
4819 }
4820 
4821 static const struct got_error *
4822 search_start_blame_view(struct tog_view *view)
4823 {
4824 	struct tog_blame_view_state *s = &view->state.blame;
4825 
4826 	s->matched_line = 0;
4827 	return NULL;
4828 }
4829 
4830 static const struct got_error *
4831 search_next_blame_view(struct tog_view *view)
4832 {
4833 	struct tog_blame_view_state *s = &view->state.blame;
4834 	const struct got_error *err = NULL;
4835 	int lineno;
4836 	char *line = NULL;
4837 	size_t linesize = 0;
4838 	ssize_t linelen;
4839 
4840 	if (!view->searching) {
4841 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4842 		return NULL;
4843 	}
4844 
4845 	if (s->matched_line) {
4846 		if (view->searching == TOG_SEARCH_FORWARD)
4847 			lineno = s->matched_line + 1;
4848 		else
4849 			lineno = s->matched_line - 1;
4850 	} else
4851 		lineno = s->first_displayed_line - 1 + s->selected_line;
4852 
4853 	while (1) {
4854 		off_t offset;
4855 
4856 		if (lineno <= 0 || lineno > s->blame.nlines) {
4857 			if (s->matched_line == 0) {
4858 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4859 				break;
4860 			}
4861 
4862 			if (view->searching == TOG_SEARCH_FORWARD)
4863 				lineno = 1;
4864 			else
4865 				lineno = s->blame.nlines;
4866 		}
4867 
4868 		offset = s->blame.line_offsets[lineno - 1];
4869 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4870 			free(line);
4871 			return got_error_from_errno("fseeko");
4872 		}
4873 		linelen = getline(&line, &linesize, s->blame.f);
4874 		if (linelen != -1) {
4875 			char *exstr;
4876 			err = expand_tab(&exstr, line);
4877 			if (err)
4878 				break;
4879 			if (match_line(exstr, &view->regex, 1,
4880 			    &view->regmatch)) {
4881 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4882 				s->matched_line = lineno;
4883 				free(exstr);
4884 				break;
4885 			}
4886 			free(exstr);
4887 		}
4888 		if (view->searching == TOG_SEARCH_FORWARD)
4889 			lineno++;
4890 		else
4891 			lineno--;
4892 	}
4893 	free(line);
4894 
4895 	if (s->matched_line) {
4896 		s->first_displayed_line = s->matched_line;
4897 		s->selected_line = 1;
4898 	}
4899 
4900 	return err;
4901 }
4902 
4903 static const struct got_error *
4904 show_blame_view(struct tog_view *view)
4905 {
4906 	const struct got_error *err = NULL;
4907 	struct tog_blame_view_state *s = &view->state.blame;
4908 	int errcode;
4909 
4910 	if (s->blame.thread == NULL && !s->blame_complete) {
4911 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4912 		    &s->blame.thread_args);
4913 		if (errcode)
4914 			return got_error_set_errno(errcode, "pthread_create");
4915 
4916 		halfdelay(1); /* fast refresh while annotating  */
4917 	}
4918 
4919 	if (s->blame_complete)
4920 		halfdelay(10); /* disable fast refresh */
4921 
4922 	err = draw_blame(view);
4923 
4924 	view_vborder(view);
4925 	return err;
4926 }
4927 
4928 static const struct got_error *
4929 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4930 {
4931 	const struct got_error *err = NULL, *thread_err = NULL;
4932 	struct tog_view *diff_view;
4933 	struct tog_blame_view_state *s = &view->state.blame;
4934 	int begin_x = 0, nscroll = view->nlines - 2;
4935 
4936 	switch (ch) {
4937 	case '0':
4938 		view->x = 0;
4939 		break;
4940 	case '$':
4941 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4942 		break;
4943 	case KEY_RIGHT:
4944 	case 'l':
4945 		if (view->x + view->ncols / 3 < view->maxx)
4946 			view->x += 2;  /* move two columns right */
4947 		break;
4948 	case KEY_LEFT:
4949 	case 'h':
4950 		view->x -= MIN(view->x, 2);  /* move two columns back */
4951 		break;
4952 	case 'q':
4953 		s->done = 1;
4954 		break;
4955 	case 'g':
4956 	case KEY_HOME:
4957 		s->selected_line = 1;
4958 		s->first_displayed_line = 1;
4959 		break;
4960 	case 'G':
4961 	case KEY_END:
4962 		if (s->blame.nlines < view->nlines - 2) {
4963 			s->selected_line = s->blame.nlines;
4964 			s->first_displayed_line = 1;
4965 		} else {
4966 			s->selected_line = view->nlines - 2;
4967 			s->first_displayed_line = s->blame.nlines -
4968 			    (view->nlines - 3);
4969 		}
4970 		break;
4971 	case 'k':
4972 	case KEY_UP:
4973 	case CTRL('p'):
4974 		if (s->selected_line > 1)
4975 			s->selected_line--;
4976 		else if (s->selected_line == 1 &&
4977 		    s->first_displayed_line > 1)
4978 			s->first_displayed_line--;
4979 		break;
4980 	case CTRL('u'):
4981 	case 'u':
4982 		nscroll /= 2;
4983 		/* FALL THROUGH */
4984 	case KEY_PPAGE:
4985 	case CTRL('b'):
4986 		if (s->first_displayed_line == 1) {
4987 			s->selected_line = MAX(1, s->selected_line - nscroll);
4988 			break;
4989 		}
4990 		if (s->first_displayed_line > nscroll)
4991 			s->first_displayed_line -= nscroll;
4992 		else
4993 			s->first_displayed_line = 1;
4994 		break;
4995 	case 'j':
4996 	case KEY_DOWN:
4997 	case CTRL('n'):
4998 		if (s->selected_line < view->nlines - 2 &&
4999 		    s->first_displayed_line +
5000 		    s->selected_line <= s->blame.nlines)
5001 			s->selected_line++;
5002 		else if (s->last_displayed_line <
5003 		    s->blame.nlines)
5004 			s->first_displayed_line++;
5005 		break;
5006 	case 'b':
5007 	case 'p': {
5008 		struct got_object_id *id = NULL;
5009 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5010 		    s->first_displayed_line, s->selected_line);
5011 		if (id == NULL)
5012 			break;
5013 		if (ch == 'p') {
5014 			struct got_commit_object *commit, *pcommit;
5015 			struct got_object_qid *pid;
5016 			struct got_object_id *blob_id = NULL;
5017 			int obj_type;
5018 			err = got_object_open_as_commit(&commit,
5019 			    s->repo, id);
5020 			if (err)
5021 				break;
5022 			pid = STAILQ_FIRST(
5023 			    got_object_commit_get_parent_ids(commit));
5024 			if (pid == NULL) {
5025 				got_object_commit_close(commit);
5026 				break;
5027 			}
5028 			/* Check if path history ends here. */
5029 			err = got_object_open_as_commit(&pcommit,
5030 			    s->repo, &pid->id);
5031 			if (err)
5032 				break;
5033 			err = got_object_id_by_path(&blob_id, s->repo,
5034 			    pcommit, s->path);
5035 			got_object_commit_close(pcommit);
5036 			if (err) {
5037 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5038 					err = NULL;
5039 				got_object_commit_close(commit);
5040 				break;
5041 			}
5042 			err = got_object_get_type(&obj_type, s->repo,
5043 			    blob_id);
5044 			free(blob_id);
5045 			/* Can't blame non-blob type objects. */
5046 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5047 				got_object_commit_close(commit);
5048 				break;
5049 			}
5050 			err = got_object_qid_alloc(&s->blamed_commit,
5051 			    &pid->id);
5052 			got_object_commit_close(commit);
5053 		} else {
5054 			if (got_object_id_cmp(id,
5055 			    &s->blamed_commit->id) == 0)
5056 				break;
5057 			err = got_object_qid_alloc(&s->blamed_commit,
5058 			    id);
5059 		}
5060 		if (err)
5061 			break;
5062 		s->done = 1;
5063 		thread_err = stop_blame(&s->blame);
5064 		s->done = 0;
5065 		if (thread_err)
5066 			break;
5067 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5068 		    s->blamed_commit, entry);
5069 		err = run_blame(view);
5070 		if (err)
5071 			break;
5072 		break;
5073 	}
5074 	case 'B': {
5075 		struct got_object_qid *first;
5076 		first = STAILQ_FIRST(&s->blamed_commits);
5077 		if (!got_object_id_cmp(&first->id, s->commit_id))
5078 			break;
5079 		s->done = 1;
5080 		thread_err = stop_blame(&s->blame);
5081 		s->done = 0;
5082 		if (thread_err)
5083 			break;
5084 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5085 		got_object_qid_free(s->blamed_commit);
5086 		s->blamed_commit =
5087 		    STAILQ_FIRST(&s->blamed_commits);
5088 		err = run_blame(view);
5089 		if (err)
5090 			break;
5091 		break;
5092 	}
5093 	case KEY_ENTER:
5094 	case '\r': {
5095 		struct got_object_id *id = NULL;
5096 		struct got_object_qid *pid;
5097 		struct got_commit_object *commit = NULL;
5098 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5099 		    s->first_displayed_line, s->selected_line);
5100 		if (id == NULL)
5101 			break;
5102 		err = got_object_open_as_commit(&commit, s->repo, id);
5103 		if (err)
5104 			break;
5105 		pid = STAILQ_FIRST(
5106 		    got_object_commit_get_parent_ids(commit));
5107 		if (view_is_parent_view(view))
5108 		    begin_x = view_split_begin_x(view->begin_x);
5109 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5110 		if (diff_view == NULL) {
5111 			got_object_commit_close(commit);
5112 			err = got_error_from_errno("view_open");
5113 			break;
5114 		}
5115 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5116 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5117 		got_object_commit_close(commit);
5118 		if (err) {
5119 			view_close(diff_view);
5120 			break;
5121 		}
5122 		view->focussed = 0;
5123 		diff_view->focussed = 1;
5124 		if (view_is_parent_view(view)) {
5125 			err = view_close_child(view);
5126 			if (err)
5127 				break;
5128 			err = view_set_child(view, diff_view);
5129 			if (err)
5130 				break;
5131 			view->focus_child = 1;
5132 		} else
5133 			*new_view = diff_view;
5134 		if (err)
5135 			break;
5136 		break;
5137 	}
5138 	case CTRL('d'):
5139 	case 'd':
5140 		nscroll /= 2;
5141 		/* FALL THROUGH */
5142 	case KEY_NPAGE:
5143 	case CTRL('f'):
5144 	case ' ':
5145 		if (s->last_displayed_line >= s->blame.nlines &&
5146 		    s->selected_line >= MIN(s->blame.nlines,
5147 		    view->nlines - 2)) {
5148 			break;
5149 		}
5150 		if (s->last_displayed_line >= s->blame.nlines &&
5151 		    s->selected_line < view->nlines - 2) {
5152 			s->selected_line +=
5153 			    MIN(nscroll, s->last_displayed_line -
5154 			    s->first_displayed_line - s->selected_line + 1);
5155 		}
5156 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5157 			s->first_displayed_line += nscroll;
5158 		else
5159 			s->first_displayed_line =
5160 			    s->blame.nlines - (view->nlines - 3);
5161 		break;
5162 	case KEY_RESIZE:
5163 		if (s->selected_line > view->nlines - 2) {
5164 			s->selected_line = MIN(s->blame.nlines,
5165 			    view->nlines - 2);
5166 		}
5167 		break;
5168 	default:
5169 		break;
5170 	}
5171 	return thread_err ? thread_err : err;
5172 }
5173 
5174 static const struct got_error *
5175 cmd_blame(int argc, char *argv[])
5176 {
5177 	const struct got_error *error;
5178 	struct got_repository *repo = NULL;
5179 	struct got_worktree *worktree = NULL;
5180 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5181 	char *link_target = NULL;
5182 	struct got_object_id *commit_id = NULL;
5183 	struct got_commit_object *commit = NULL;
5184 	char *commit_id_str = NULL;
5185 	int ch;
5186 	struct tog_view *view;
5187 	int *pack_fds = NULL;
5188 
5189 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5190 		switch (ch) {
5191 		case 'c':
5192 			commit_id_str = optarg;
5193 			break;
5194 		case 'r':
5195 			repo_path = realpath(optarg, NULL);
5196 			if (repo_path == NULL)
5197 				return got_error_from_errno2("realpath",
5198 				    optarg);
5199 			break;
5200 		default:
5201 			usage_blame();
5202 			/* NOTREACHED */
5203 		}
5204 	}
5205 
5206 	argc -= optind;
5207 	argv += optind;
5208 
5209 	if (argc != 1)
5210 		usage_blame();
5211 
5212 	error = got_repo_pack_fds_open(&pack_fds);
5213 	if (error != NULL)
5214 		goto done;
5215 
5216 	if (repo_path == NULL) {
5217 		cwd = getcwd(NULL, 0);
5218 		if (cwd == NULL)
5219 			return got_error_from_errno("getcwd");
5220 		error = got_worktree_open(&worktree, cwd);
5221 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5222 			goto done;
5223 		if (worktree)
5224 			repo_path =
5225 			    strdup(got_worktree_get_repo_path(worktree));
5226 		else
5227 			repo_path = strdup(cwd);
5228 		if (repo_path == NULL) {
5229 			error = got_error_from_errno("strdup");
5230 			goto done;
5231 		}
5232 	}
5233 
5234 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5235 	if (error != NULL)
5236 		goto done;
5237 
5238 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5239 	    worktree);
5240 	if (error)
5241 		goto done;
5242 
5243 	init_curses();
5244 
5245 	error = apply_unveil(got_repo_get_path(repo), NULL);
5246 	if (error)
5247 		goto done;
5248 
5249 	error = tog_load_refs(repo, 0);
5250 	if (error)
5251 		goto done;
5252 
5253 	if (commit_id_str == NULL) {
5254 		struct got_reference *head_ref;
5255 		error = got_ref_open(&head_ref, repo, worktree ?
5256 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5257 		if (error != NULL)
5258 			goto done;
5259 		error = got_ref_resolve(&commit_id, repo, head_ref);
5260 		got_ref_close(head_ref);
5261 	} else {
5262 		error = got_repo_match_object_id(&commit_id, NULL,
5263 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5264 	}
5265 	if (error != NULL)
5266 		goto done;
5267 
5268 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5269 	if (view == NULL) {
5270 		error = got_error_from_errno("view_open");
5271 		goto done;
5272 	}
5273 
5274 	error = got_object_open_as_commit(&commit, repo, commit_id);
5275 	if (error)
5276 		goto done;
5277 
5278 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5279 	    commit, repo);
5280 	if (error)
5281 		goto done;
5282 
5283 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5284 	    commit_id, repo);
5285 	if (error)
5286 		goto done;
5287 	if (worktree) {
5288 		/* Release work tree lock. */
5289 		got_worktree_close(worktree);
5290 		worktree = NULL;
5291 	}
5292 	error = view_loop(view);
5293 done:
5294 	free(repo_path);
5295 	free(in_repo_path);
5296 	free(link_target);
5297 	free(cwd);
5298 	free(commit_id);
5299 	if (commit)
5300 		got_object_commit_close(commit);
5301 	if (worktree)
5302 		got_worktree_close(worktree);
5303 	if (repo) {
5304 		const struct got_error *close_err = got_repo_close(repo);
5305 		if (error == NULL)
5306 			error = close_err;
5307 	}
5308 	if (pack_fds) {
5309 		const struct got_error *pack_err =
5310 		    got_repo_pack_fds_close(pack_fds);
5311 		if (error == NULL)
5312 			error = pack_err;
5313 	}
5314 	tog_free_refs();
5315 	return error;
5316 }
5317 
5318 static const struct got_error *
5319 draw_tree_entries(struct tog_view *view, const char *parent_path)
5320 {
5321 	struct tog_tree_view_state *s = &view->state.tree;
5322 	const struct got_error *err = NULL;
5323 	struct got_tree_entry *te;
5324 	wchar_t *wline;
5325 	struct tog_color *tc;
5326 	int width, n, i, nentries;
5327 	int limit = view->nlines;
5328 
5329 	s->ndisplayed = 0;
5330 
5331 	werase(view->window);
5332 
5333 	if (limit == 0)
5334 		return NULL;
5335 
5336 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5337 	    0, 0);
5338 	if (err)
5339 		return err;
5340 	if (view_needs_focus_indication(view))
5341 		wstandout(view->window);
5342 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5343 	if (tc)
5344 		wattr_on(view->window,
5345 		    COLOR_PAIR(tc->colorpair), NULL);
5346 	waddwstr(view->window, wline);
5347 	if (tc)
5348 		wattr_off(view->window,
5349 		    COLOR_PAIR(tc->colorpair), NULL);
5350 	if (view_needs_focus_indication(view))
5351 		wstandend(view->window);
5352 	free(wline);
5353 	wline = NULL;
5354 	if (width < view->ncols - 1)
5355 		waddch(view->window, '\n');
5356 	if (--limit <= 0)
5357 		return NULL;
5358 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5359 	    0, 0);
5360 	if (err)
5361 		return err;
5362 	waddwstr(view->window, wline);
5363 	free(wline);
5364 	wline = NULL;
5365 	if (width < view->ncols - 1)
5366 		waddch(view->window, '\n');
5367 	if (--limit <= 0)
5368 		return NULL;
5369 	waddch(view->window, '\n');
5370 	if (--limit <= 0)
5371 		return NULL;
5372 
5373 	if (s->first_displayed_entry == NULL) {
5374 		te = got_object_tree_get_first_entry(s->tree);
5375 		if (s->selected == 0) {
5376 			if (view->focussed)
5377 				wstandout(view->window);
5378 			s->selected_entry = NULL;
5379 		}
5380 		waddstr(view->window, "  ..\n");	/* parent directory */
5381 		if (s->selected == 0 && view->focussed)
5382 			wstandend(view->window);
5383 		s->ndisplayed++;
5384 		if (--limit <= 0)
5385 			return NULL;
5386 		n = 1;
5387 	} else {
5388 		n = 0;
5389 		te = s->first_displayed_entry;
5390 	}
5391 
5392 	nentries = got_object_tree_get_nentries(s->tree);
5393 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5394 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5395 		const char *modestr = "";
5396 		mode_t mode;
5397 
5398 		te = got_object_tree_get_entry(s->tree, i);
5399 		mode = got_tree_entry_get_mode(te);
5400 
5401 		if (s->show_ids) {
5402 			err = got_object_id_str(&id_str,
5403 			    got_tree_entry_get_id(te));
5404 			if (err)
5405 				return got_error_from_errno(
5406 				    "got_object_id_str");
5407 		}
5408 		if (got_object_tree_entry_is_submodule(te))
5409 			modestr = "$";
5410 		else if (S_ISLNK(mode)) {
5411 			int i;
5412 
5413 			err = got_tree_entry_get_symlink_target(&link_target,
5414 			    te, s->repo);
5415 			if (err) {
5416 				free(id_str);
5417 				return err;
5418 			}
5419 			for (i = 0; i < strlen(link_target); i++) {
5420 				if (!isprint((unsigned char)link_target[i]))
5421 					link_target[i] = '?';
5422 			}
5423 			modestr = "@";
5424 		}
5425 		else if (S_ISDIR(mode))
5426 			modestr = "/";
5427 		else if (mode & S_IXUSR)
5428 			modestr = "*";
5429 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5430 		    got_tree_entry_get_name(te), modestr,
5431 		    link_target ? " -> ": "",
5432 		    link_target ? link_target : "") == -1) {
5433 			free(id_str);
5434 			free(link_target);
5435 			return got_error_from_errno("asprintf");
5436 		}
5437 		free(id_str);
5438 		free(link_target);
5439 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5440 		    0, 0);
5441 		if (err) {
5442 			free(line);
5443 			break;
5444 		}
5445 		if (n == s->selected) {
5446 			if (view->focussed)
5447 				wstandout(view->window);
5448 			s->selected_entry = te;
5449 		}
5450 		tc = match_color(&s->colors, line);
5451 		if (tc)
5452 			wattr_on(view->window,
5453 			    COLOR_PAIR(tc->colorpair), NULL);
5454 		waddwstr(view->window, wline);
5455 		if (tc)
5456 			wattr_off(view->window,
5457 			    COLOR_PAIR(tc->colorpair), NULL);
5458 		if (width < view->ncols - 1)
5459 			waddch(view->window, '\n');
5460 		if (n == s->selected && view->focussed)
5461 			wstandend(view->window);
5462 		free(line);
5463 		free(wline);
5464 		wline = NULL;
5465 		n++;
5466 		s->ndisplayed++;
5467 		s->last_displayed_entry = te;
5468 		if (--limit <= 0)
5469 			break;
5470 	}
5471 
5472 	return err;
5473 }
5474 
5475 static void
5476 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5477 {
5478 	struct got_tree_entry *te;
5479 	int isroot = s->tree == s->root;
5480 	int i = 0;
5481 
5482 	if (s->first_displayed_entry == NULL)
5483 		return;
5484 
5485 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5486 	while (i++ < maxscroll) {
5487 		if (te == NULL) {
5488 			if (!isroot)
5489 				s->first_displayed_entry = NULL;
5490 			break;
5491 		}
5492 		s->first_displayed_entry = te;
5493 		te = got_tree_entry_get_prev(s->tree, te);
5494 	}
5495 }
5496 
5497 static void
5498 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5499 {
5500 	struct got_tree_entry *next, *last;
5501 	int n = 0;
5502 
5503 	if (s->first_displayed_entry)
5504 		next = got_tree_entry_get_next(s->tree,
5505 		    s->first_displayed_entry);
5506 	else
5507 		next = got_object_tree_get_first_entry(s->tree);
5508 
5509 	last = s->last_displayed_entry;
5510 	while (next && last && n++ < maxscroll) {
5511 		last = got_tree_entry_get_next(s->tree, last);
5512 		if (last) {
5513 			s->first_displayed_entry = next;
5514 			next = got_tree_entry_get_next(s->tree, next);
5515 		}
5516 	}
5517 }
5518 
5519 static const struct got_error *
5520 tree_entry_path(char **path, struct tog_parent_trees *parents,
5521     struct got_tree_entry *te)
5522 {
5523 	const struct got_error *err = NULL;
5524 	struct tog_parent_tree *pt;
5525 	size_t len = 2; /* for leading slash and NUL */
5526 
5527 	TAILQ_FOREACH(pt, parents, entry)
5528 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5529 		    + 1 /* slash */;
5530 	if (te)
5531 		len += strlen(got_tree_entry_get_name(te));
5532 
5533 	*path = calloc(1, len);
5534 	if (path == NULL)
5535 		return got_error_from_errno("calloc");
5536 
5537 	(*path)[0] = '/';
5538 	pt = TAILQ_LAST(parents, tog_parent_trees);
5539 	while (pt) {
5540 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5541 		if (strlcat(*path, name, len) >= len) {
5542 			err = got_error(GOT_ERR_NO_SPACE);
5543 			goto done;
5544 		}
5545 		if (strlcat(*path, "/", len) >= len) {
5546 			err = got_error(GOT_ERR_NO_SPACE);
5547 			goto done;
5548 		}
5549 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5550 	}
5551 	if (te) {
5552 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5553 			err = got_error(GOT_ERR_NO_SPACE);
5554 			goto done;
5555 		}
5556 	}
5557 done:
5558 	if (err) {
5559 		free(*path);
5560 		*path = NULL;
5561 	}
5562 	return err;
5563 }
5564 
5565 static const struct got_error *
5566 blame_tree_entry(struct tog_view **new_view, int begin_x,
5567     struct got_tree_entry *te, struct tog_parent_trees *parents,
5568     struct got_object_id *commit_id, struct got_repository *repo)
5569 {
5570 	const struct got_error *err = NULL;
5571 	char *path;
5572 	struct tog_view *blame_view;
5573 
5574 	*new_view = NULL;
5575 
5576 	err = tree_entry_path(&path, parents, te);
5577 	if (err)
5578 		return err;
5579 
5580 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5581 	if (blame_view == NULL) {
5582 		err = got_error_from_errno("view_open");
5583 		goto done;
5584 	}
5585 
5586 	err = open_blame_view(blame_view, path, commit_id, repo);
5587 	if (err) {
5588 		if (err->code == GOT_ERR_CANCELLED)
5589 			err = NULL;
5590 		view_close(blame_view);
5591 	} else
5592 		*new_view = blame_view;
5593 done:
5594 	free(path);
5595 	return err;
5596 }
5597 
5598 static const struct got_error *
5599 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5600     struct tog_tree_view_state *s)
5601 {
5602 	struct tog_view *log_view;
5603 	const struct got_error *err = NULL;
5604 	char *path;
5605 
5606 	*new_view = NULL;
5607 
5608 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5609 	if (log_view == NULL)
5610 		return got_error_from_errno("view_open");
5611 
5612 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5613 	if (err)
5614 		return err;
5615 
5616 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5617 	    path, 0);
5618 	if (err)
5619 		view_close(log_view);
5620 	else
5621 		*new_view = log_view;
5622 	free(path);
5623 	return err;
5624 }
5625 
5626 static const struct got_error *
5627 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5628     const char *head_ref_name, struct got_repository *repo)
5629 {
5630 	const struct got_error *err = NULL;
5631 	char *commit_id_str = NULL;
5632 	struct tog_tree_view_state *s = &view->state.tree;
5633 	struct got_commit_object *commit = NULL;
5634 
5635 	TAILQ_INIT(&s->parents);
5636 	STAILQ_INIT(&s->colors);
5637 
5638 	s->commit_id = got_object_id_dup(commit_id);
5639 	if (s->commit_id == NULL)
5640 		return got_error_from_errno("got_object_id_dup");
5641 
5642 	err = got_object_open_as_commit(&commit, repo, commit_id);
5643 	if (err)
5644 		goto done;
5645 
5646 	/*
5647 	 * The root is opened here and will be closed when the view is closed.
5648 	 * Any visited subtrees and their path-wise parents are opened and
5649 	 * closed on demand.
5650 	 */
5651 	err = got_object_open_as_tree(&s->root, repo,
5652 	    got_object_commit_get_tree_id(commit));
5653 	if (err)
5654 		goto done;
5655 	s->tree = s->root;
5656 
5657 	err = got_object_id_str(&commit_id_str, commit_id);
5658 	if (err != NULL)
5659 		goto done;
5660 
5661 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5662 		err = got_error_from_errno("asprintf");
5663 		goto done;
5664 	}
5665 
5666 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5667 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5668 	if (head_ref_name) {
5669 		s->head_ref_name = strdup(head_ref_name);
5670 		if (s->head_ref_name == NULL) {
5671 			err = got_error_from_errno("strdup");
5672 			goto done;
5673 		}
5674 	}
5675 	s->repo = repo;
5676 
5677 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5678 		err = add_color(&s->colors, "\\$$",
5679 		    TOG_COLOR_TREE_SUBMODULE,
5680 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5681 		if (err)
5682 			goto done;
5683 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5684 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5685 		if (err)
5686 			goto done;
5687 		err = add_color(&s->colors, "/$",
5688 		    TOG_COLOR_TREE_DIRECTORY,
5689 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5690 		if (err)
5691 			goto done;
5692 
5693 		err = add_color(&s->colors, "\\*$",
5694 		    TOG_COLOR_TREE_EXECUTABLE,
5695 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5696 		if (err)
5697 			goto done;
5698 
5699 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5700 		    get_color_value("TOG_COLOR_COMMIT"));
5701 		if (err)
5702 			goto done;
5703 	}
5704 
5705 	view->show = show_tree_view;
5706 	view->input = input_tree_view;
5707 	view->close = close_tree_view;
5708 	view->search_start = search_start_tree_view;
5709 	view->search_next = search_next_tree_view;
5710 done:
5711 	free(commit_id_str);
5712 	if (commit)
5713 		got_object_commit_close(commit);
5714 	if (err)
5715 		close_tree_view(view);
5716 	return err;
5717 }
5718 
5719 static const struct got_error *
5720 close_tree_view(struct tog_view *view)
5721 {
5722 	struct tog_tree_view_state *s = &view->state.tree;
5723 
5724 	free_colors(&s->colors);
5725 	free(s->tree_label);
5726 	s->tree_label = NULL;
5727 	free(s->commit_id);
5728 	s->commit_id = NULL;
5729 	free(s->head_ref_name);
5730 	s->head_ref_name = NULL;
5731 	while (!TAILQ_EMPTY(&s->parents)) {
5732 		struct tog_parent_tree *parent;
5733 		parent = TAILQ_FIRST(&s->parents);
5734 		TAILQ_REMOVE(&s->parents, parent, entry);
5735 		if (parent->tree != s->root)
5736 			got_object_tree_close(parent->tree);
5737 		free(parent);
5738 
5739 	}
5740 	if (s->tree != NULL && s->tree != s->root)
5741 		got_object_tree_close(s->tree);
5742 	if (s->root)
5743 		got_object_tree_close(s->root);
5744 	return NULL;
5745 }
5746 
5747 static const struct got_error *
5748 search_start_tree_view(struct tog_view *view)
5749 {
5750 	struct tog_tree_view_state *s = &view->state.tree;
5751 
5752 	s->matched_entry = NULL;
5753 	return NULL;
5754 }
5755 
5756 static int
5757 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5758 {
5759 	regmatch_t regmatch;
5760 
5761 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5762 	    0) == 0;
5763 }
5764 
5765 static const struct got_error *
5766 search_next_tree_view(struct tog_view *view)
5767 {
5768 	struct tog_tree_view_state *s = &view->state.tree;
5769 	struct got_tree_entry *te = NULL;
5770 
5771 	if (!view->searching) {
5772 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5773 		return NULL;
5774 	}
5775 
5776 	if (s->matched_entry) {
5777 		if (view->searching == TOG_SEARCH_FORWARD) {
5778 			if (s->selected_entry)
5779 				te = got_tree_entry_get_next(s->tree,
5780 				    s->selected_entry);
5781 			else
5782 				te = got_object_tree_get_first_entry(s->tree);
5783 		} else {
5784 			if (s->selected_entry == NULL)
5785 				te = got_object_tree_get_last_entry(s->tree);
5786 			else
5787 				te = got_tree_entry_get_prev(s->tree,
5788 				    s->selected_entry);
5789 		}
5790 	} else {
5791 		if (s->selected_entry)
5792 			te = s->selected_entry;
5793 		else if (view->searching == TOG_SEARCH_FORWARD)
5794 			te = got_object_tree_get_first_entry(s->tree);
5795 		else
5796 			te = got_object_tree_get_last_entry(s->tree);
5797 	}
5798 
5799 	while (1) {
5800 		if (te == NULL) {
5801 			if (s->matched_entry == NULL) {
5802 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5803 				return NULL;
5804 			}
5805 			if (view->searching == TOG_SEARCH_FORWARD)
5806 				te = got_object_tree_get_first_entry(s->tree);
5807 			else
5808 				te = got_object_tree_get_last_entry(s->tree);
5809 		}
5810 
5811 		if (match_tree_entry(te, &view->regex)) {
5812 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5813 			s->matched_entry = te;
5814 			break;
5815 		}
5816 
5817 		if (view->searching == TOG_SEARCH_FORWARD)
5818 			te = got_tree_entry_get_next(s->tree, te);
5819 		else
5820 			te = got_tree_entry_get_prev(s->tree, te);
5821 	}
5822 
5823 	if (s->matched_entry) {
5824 		s->first_displayed_entry = s->matched_entry;
5825 		s->selected = 0;
5826 	}
5827 
5828 	return NULL;
5829 }
5830 
5831 static const struct got_error *
5832 show_tree_view(struct tog_view *view)
5833 {
5834 	const struct got_error *err = NULL;
5835 	struct tog_tree_view_state *s = &view->state.tree;
5836 	char *parent_path;
5837 
5838 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5839 	if (err)
5840 		return err;
5841 
5842 	err = draw_tree_entries(view, parent_path);
5843 	free(parent_path);
5844 
5845 	view_vborder(view);
5846 	return err;
5847 }
5848 
5849 static const struct got_error *
5850 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5851 {
5852 	const struct got_error *err = NULL;
5853 	struct tog_tree_view_state *s = &view->state.tree;
5854 	struct tog_view *log_view, *ref_view;
5855 	struct got_tree_entry *te;
5856 	int begin_x = 0, n, nscroll = view->nlines - 3;
5857 
5858 	switch (ch) {
5859 	case 'i':
5860 		s->show_ids = !s->show_ids;
5861 		break;
5862 	case 'l':
5863 		if (!s->selected_entry)
5864 			break;
5865 		if (view_is_parent_view(view))
5866 			begin_x = view_split_begin_x(view->begin_x);
5867 		err = log_selected_tree_entry(&log_view, begin_x, s);
5868 		view->focussed = 0;
5869 		log_view->focussed = 1;
5870 		if (view_is_parent_view(view)) {
5871 			err = view_close_child(view);
5872 			if (err)
5873 				return err;
5874 			err = view_set_child(view, log_view);
5875 			if (err)
5876 				return err;
5877 			view->focus_child = 1;
5878 		} else
5879 			*new_view = log_view;
5880 		break;
5881 	case 'r':
5882 		if (view_is_parent_view(view))
5883 			begin_x = view_split_begin_x(view->begin_x);
5884 		ref_view = view_open(view->nlines, view->ncols,
5885 		    view->begin_y, begin_x, TOG_VIEW_REF);
5886 		if (ref_view == NULL)
5887 			return got_error_from_errno("view_open");
5888 		err = open_ref_view(ref_view, s->repo);
5889 		if (err) {
5890 			view_close(ref_view);
5891 			return err;
5892 		}
5893 		view->focussed = 0;
5894 		ref_view->focussed = 1;
5895 		if (view_is_parent_view(view)) {
5896 			err = view_close_child(view);
5897 			if (err)
5898 				return err;
5899 			err = view_set_child(view, ref_view);
5900 			if (err)
5901 				return err;
5902 			view->focus_child = 1;
5903 		} else
5904 			*new_view = ref_view;
5905 		break;
5906 	case 'g':
5907 	case KEY_HOME:
5908 		s->selected = 0;
5909 		if (s->tree == s->root)
5910 			s->first_displayed_entry =
5911 			    got_object_tree_get_first_entry(s->tree);
5912 		else
5913 			s->first_displayed_entry = NULL;
5914 		break;
5915 	case 'G':
5916 	case KEY_END:
5917 		s->selected = 0;
5918 		te = got_object_tree_get_last_entry(s->tree);
5919 		for (n = 0; n < view->nlines - 3; n++) {
5920 			if (te == NULL) {
5921 				if(s->tree != s->root) {
5922 					s->first_displayed_entry = NULL;
5923 					n++;
5924 				}
5925 				break;
5926 			}
5927 			s->first_displayed_entry = te;
5928 			te = got_tree_entry_get_prev(s->tree, te);
5929 		}
5930 		if (n > 0)
5931 			s->selected = n - 1;
5932 		break;
5933 	case 'k':
5934 	case KEY_UP:
5935 	case CTRL('p'):
5936 		if (s->selected > 0) {
5937 			s->selected--;
5938 			break;
5939 		}
5940 		tree_scroll_up(s, 1);
5941 		break;
5942 	case CTRL('u'):
5943 	case 'u':
5944 		nscroll /= 2;
5945 		/* FALL THROUGH */
5946 	case KEY_PPAGE:
5947 	case CTRL('b'):
5948 		if (s->tree == s->root) {
5949 			if (got_object_tree_get_first_entry(s->tree) ==
5950 			    s->first_displayed_entry)
5951 				s->selected -= MIN(s->selected, nscroll);
5952 		} else {
5953 			if (s->first_displayed_entry == NULL)
5954 				s->selected -= MIN(s->selected, nscroll);
5955 		}
5956 		tree_scroll_up(s, MAX(0, nscroll));
5957 		break;
5958 	case 'j':
5959 	case KEY_DOWN:
5960 	case CTRL('n'):
5961 		if (s->selected < s->ndisplayed - 1) {
5962 			s->selected++;
5963 			break;
5964 		}
5965 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5966 		    == NULL)
5967 			/* can't scroll any further */
5968 			break;
5969 		tree_scroll_down(s, 1);
5970 		break;
5971 	case CTRL('d'):
5972 	case 'd':
5973 		nscroll /= 2;
5974 		/* FALL THROUGH */
5975 	case KEY_NPAGE:
5976 	case CTRL('f'):
5977 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5978 		    == NULL) {
5979 			/* can't scroll any further; move cursor down */
5980 			if (s->selected < s->ndisplayed - 1)
5981 				s->selected += MIN(nscroll,
5982 				    s->ndisplayed - s->selected - 1);
5983 			break;
5984 		}
5985 		tree_scroll_down(s, nscroll);
5986 		break;
5987 	case KEY_ENTER:
5988 	case '\r':
5989 	case KEY_BACKSPACE:
5990 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5991 			struct tog_parent_tree *parent;
5992 			/* user selected '..' */
5993 			if (s->tree == s->root)
5994 				break;
5995 			parent = TAILQ_FIRST(&s->parents);
5996 			TAILQ_REMOVE(&s->parents, parent,
5997 			    entry);
5998 			got_object_tree_close(s->tree);
5999 			s->tree = parent->tree;
6000 			s->first_displayed_entry =
6001 			    parent->first_displayed_entry;
6002 			s->selected_entry =
6003 			    parent->selected_entry;
6004 			s->selected = parent->selected;
6005 			free(parent);
6006 		} else if (S_ISDIR(got_tree_entry_get_mode(
6007 		    s->selected_entry))) {
6008 			struct got_tree_object *subtree;
6009 			err = got_object_open_as_tree(&subtree, s->repo,
6010 			    got_tree_entry_get_id(s->selected_entry));
6011 			if (err)
6012 				break;
6013 			err = tree_view_visit_subtree(s, subtree);
6014 			if (err) {
6015 				got_object_tree_close(subtree);
6016 				break;
6017 			}
6018 		} else if (S_ISREG(got_tree_entry_get_mode(
6019 		    s->selected_entry))) {
6020 			struct tog_view *blame_view;
6021 			int begin_x = view_is_parent_view(view) ?
6022 			    view_split_begin_x(view->begin_x) : 0;
6023 
6024 			err = blame_tree_entry(&blame_view, begin_x,
6025 			    s->selected_entry, &s->parents,
6026 			    s->commit_id, s->repo);
6027 			if (err)
6028 				break;
6029 			view->focussed = 0;
6030 			blame_view->focussed = 1;
6031 			if (view_is_parent_view(view)) {
6032 				err = view_close_child(view);
6033 				if (err)
6034 					return err;
6035 				err = view_set_child(view, blame_view);
6036 				if (err)
6037 					return err;
6038 				view->focus_child = 1;
6039 			} else
6040 				*new_view = blame_view;
6041 		}
6042 		break;
6043 	case KEY_RESIZE:
6044 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6045 			s->selected = view->nlines - 4;
6046 		break;
6047 	default:
6048 		break;
6049 	}
6050 
6051 	return err;
6052 }
6053 
6054 __dead static void
6055 usage_tree(void)
6056 {
6057 	endwin();
6058 	fprintf(stderr,
6059 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6060 	    getprogname());
6061 	exit(1);
6062 }
6063 
6064 static const struct got_error *
6065 cmd_tree(int argc, char *argv[])
6066 {
6067 	const struct got_error *error;
6068 	struct got_repository *repo = NULL;
6069 	struct got_worktree *worktree = NULL;
6070 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6071 	struct got_object_id *commit_id = NULL;
6072 	struct got_commit_object *commit = NULL;
6073 	const char *commit_id_arg = NULL;
6074 	char *label = NULL;
6075 	struct got_reference *ref = NULL;
6076 	const char *head_ref_name = NULL;
6077 	int ch;
6078 	struct tog_view *view;
6079 	int *pack_fds = NULL;
6080 
6081 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6082 		switch (ch) {
6083 		case 'c':
6084 			commit_id_arg = optarg;
6085 			break;
6086 		case 'r':
6087 			repo_path = realpath(optarg, NULL);
6088 			if (repo_path == NULL)
6089 				return got_error_from_errno2("realpath",
6090 				    optarg);
6091 			break;
6092 		default:
6093 			usage_tree();
6094 			/* NOTREACHED */
6095 		}
6096 	}
6097 
6098 	argc -= optind;
6099 	argv += optind;
6100 
6101 	if (argc > 1)
6102 		usage_tree();
6103 
6104 	error = got_repo_pack_fds_open(&pack_fds);
6105 	if (error != NULL)
6106 		goto done;
6107 
6108 	if (repo_path == NULL) {
6109 		cwd = getcwd(NULL, 0);
6110 		if (cwd == NULL)
6111 			return got_error_from_errno("getcwd");
6112 		error = got_worktree_open(&worktree, cwd);
6113 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6114 			goto done;
6115 		if (worktree)
6116 			repo_path =
6117 			    strdup(got_worktree_get_repo_path(worktree));
6118 		else
6119 			repo_path = strdup(cwd);
6120 		if (repo_path == NULL) {
6121 			error = got_error_from_errno("strdup");
6122 			goto done;
6123 		}
6124 	}
6125 
6126 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6127 	if (error != NULL)
6128 		goto done;
6129 
6130 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6131 	    repo, worktree);
6132 	if (error)
6133 		goto done;
6134 
6135 	init_curses();
6136 
6137 	error = apply_unveil(got_repo_get_path(repo), NULL);
6138 	if (error)
6139 		goto done;
6140 
6141 	error = tog_load_refs(repo, 0);
6142 	if (error)
6143 		goto done;
6144 
6145 	if (commit_id_arg == NULL) {
6146 		error = got_repo_match_object_id(&commit_id, &label,
6147 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6148 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6149 		if (error)
6150 			goto done;
6151 		head_ref_name = label;
6152 	} else {
6153 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6154 		if (error == NULL)
6155 			head_ref_name = got_ref_get_name(ref);
6156 		else if (error->code != GOT_ERR_NOT_REF)
6157 			goto done;
6158 		error = got_repo_match_object_id(&commit_id, NULL,
6159 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6160 		if (error)
6161 			goto done;
6162 	}
6163 
6164 	error = got_object_open_as_commit(&commit, repo, commit_id);
6165 	if (error)
6166 		goto done;
6167 
6168 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6169 	if (view == NULL) {
6170 		error = got_error_from_errno("view_open");
6171 		goto done;
6172 	}
6173 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6174 	if (error)
6175 		goto done;
6176 	if (!got_path_is_root_dir(in_repo_path)) {
6177 		error = tree_view_walk_path(&view->state.tree, commit,
6178 		    in_repo_path);
6179 		if (error)
6180 			goto done;
6181 	}
6182 
6183 	if (worktree) {
6184 		/* Release work tree lock. */
6185 		got_worktree_close(worktree);
6186 		worktree = NULL;
6187 	}
6188 	error = view_loop(view);
6189 done:
6190 	free(repo_path);
6191 	free(cwd);
6192 	free(commit_id);
6193 	free(label);
6194 	if (ref)
6195 		got_ref_close(ref);
6196 	if (repo) {
6197 		const struct got_error *close_err = got_repo_close(repo);
6198 		if (error == NULL)
6199 			error = close_err;
6200 	}
6201 	if (pack_fds) {
6202 		const struct got_error *pack_err =
6203 		    got_repo_pack_fds_close(pack_fds);
6204 		if (error == NULL)
6205 			error = pack_err;
6206 	}
6207 	tog_free_refs();
6208 	return error;
6209 }
6210 
6211 static const struct got_error *
6212 ref_view_load_refs(struct tog_ref_view_state *s)
6213 {
6214 	struct got_reflist_entry *sre;
6215 	struct tog_reflist_entry *re;
6216 
6217 	s->nrefs = 0;
6218 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6219 		if (strncmp(got_ref_get_name(sre->ref),
6220 		    "refs/got/", 9) == 0 &&
6221 		    strncmp(got_ref_get_name(sre->ref),
6222 		    "refs/got/backup/", 16) != 0)
6223 			continue;
6224 
6225 		re = malloc(sizeof(*re));
6226 		if (re == NULL)
6227 			return got_error_from_errno("malloc");
6228 
6229 		re->ref = got_ref_dup(sre->ref);
6230 		if (re->ref == NULL)
6231 			return got_error_from_errno("got_ref_dup");
6232 		re->idx = s->nrefs++;
6233 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6234 	}
6235 
6236 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6237 	return NULL;
6238 }
6239 
6240 void
6241 ref_view_free_refs(struct tog_ref_view_state *s)
6242 {
6243 	struct tog_reflist_entry *re;
6244 
6245 	while (!TAILQ_EMPTY(&s->refs)) {
6246 		re = TAILQ_FIRST(&s->refs);
6247 		TAILQ_REMOVE(&s->refs, re, entry);
6248 		got_ref_close(re->ref);
6249 		free(re);
6250 	}
6251 }
6252 
6253 static const struct got_error *
6254 open_ref_view(struct tog_view *view, struct got_repository *repo)
6255 {
6256 	const struct got_error *err = NULL;
6257 	struct tog_ref_view_state *s = &view->state.ref;
6258 
6259 	s->selected_entry = 0;
6260 	s->repo = repo;
6261 
6262 	TAILQ_INIT(&s->refs);
6263 	STAILQ_INIT(&s->colors);
6264 
6265 	err = ref_view_load_refs(s);
6266 	if (err)
6267 		return err;
6268 
6269 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6270 		err = add_color(&s->colors, "^refs/heads/",
6271 		    TOG_COLOR_REFS_HEADS,
6272 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6273 		if (err)
6274 			goto done;
6275 
6276 		err = add_color(&s->colors, "^refs/tags/",
6277 		    TOG_COLOR_REFS_TAGS,
6278 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6279 		if (err)
6280 			goto done;
6281 
6282 		err = add_color(&s->colors, "^refs/remotes/",
6283 		    TOG_COLOR_REFS_REMOTES,
6284 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6285 		if (err)
6286 			goto done;
6287 
6288 		err = add_color(&s->colors, "^refs/got/backup/",
6289 		    TOG_COLOR_REFS_BACKUP,
6290 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6291 		if (err)
6292 			goto done;
6293 	}
6294 
6295 	view->show = show_ref_view;
6296 	view->input = input_ref_view;
6297 	view->close = close_ref_view;
6298 	view->search_start = search_start_ref_view;
6299 	view->search_next = search_next_ref_view;
6300 done:
6301 	if (err)
6302 		free_colors(&s->colors);
6303 	return err;
6304 }
6305 
6306 static const struct got_error *
6307 close_ref_view(struct tog_view *view)
6308 {
6309 	struct tog_ref_view_state *s = &view->state.ref;
6310 
6311 	ref_view_free_refs(s);
6312 	free_colors(&s->colors);
6313 
6314 	return NULL;
6315 }
6316 
6317 static const struct got_error *
6318 resolve_reflist_entry(struct got_object_id **commit_id,
6319     struct tog_reflist_entry *re, struct got_repository *repo)
6320 {
6321 	const struct got_error *err = NULL;
6322 	struct got_object_id *obj_id;
6323 	struct got_tag_object *tag = NULL;
6324 	int obj_type;
6325 
6326 	*commit_id = NULL;
6327 
6328 	err = got_ref_resolve(&obj_id, repo, re->ref);
6329 	if (err)
6330 		return err;
6331 
6332 	err = got_object_get_type(&obj_type, repo, obj_id);
6333 	if (err)
6334 		goto done;
6335 
6336 	switch (obj_type) {
6337 	case GOT_OBJ_TYPE_COMMIT:
6338 		*commit_id = obj_id;
6339 		break;
6340 	case GOT_OBJ_TYPE_TAG:
6341 		err = got_object_open_as_tag(&tag, repo, obj_id);
6342 		if (err)
6343 			goto done;
6344 		free(obj_id);
6345 		err = got_object_get_type(&obj_type, repo,
6346 		    got_object_tag_get_object_id(tag));
6347 		if (err)
6348 			goto done;
6349 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6350 			err = got_error(GOT_ERR_OBJ_TYPE);
6351 			goto done;
6352 		}
6353 		*commit_id = got_object_id_dup(
6354 		    got_object_tag_get_object_id(tag));
6355 		if (*commit_id == NULL) {
6356 			err = got_error_from_errno("got_object_id_dup");
6357 			goto done;
6358 		}
6359 		break;
6360 	default:
6361 		err = got_error(GOT_ERR_OBJ_TYPE);
6362 		break;
6363 	}
6364 
6365 done:
6366 	if (tag)
6367 		got_object_tag_close(tag);
6368 	if (err) {
6369 		free(*commit_id);
6370 		*commit_id = NULL;
6371 	}
6372 	return err;
6373 }
6374 
6375 static const struct got_error *
6376 log_ref_entry(struct tog_view **new_view, int begin_x,
6377     struct tog_reflist_entry *re, struct got_repository *repo)
6378 {
6379 	struct tog_view *log_view;
6380 	const struct got_error *err = NULL;
6381 	struct got_object_id *commit_id = NULL;
6382 
6383 	*new_view = NULL;
6384 
6385 	err = resolve_reflist_entry(&commit_id, re, repo);
6386 	if (err) {
6387 		if (err->code != GOT_ERR_OBJ_TYPE)
6388 			return err;
6389 		else
6390 			return NULL;
6391 	}
6392 
6393 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6394 	if (log_view == NULL) {
6395 		err = got_error_from_errno("view_open");
6396 		goto done;
6397 	}
6398 
6399 	err = open_log_view(log_view, commit_id, repo,
6400 	    got_ref_get_name(re->ref), "", 0);
6401 done:
6402 	if (err)
6403 		view_close(log_view);
6404 	else
6405 		*new_view = log_view;
6406 	free(commit_id);
6407 	return err;
6408 }
6409 
6410 static void
6411 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6412 {
6413 	struct tog_reflist_entry *re;
6414 	int i = 0;
6415 
6416 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6417 		return;
6418 
6419 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6420 	while (i++ < maxscroll) {
6421 		if (re == NULL)
6422 			break;
6423 		s->first_displayed_entry = re;
6424 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6425 	}
6426 }
6427 
6428 static void
6429 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6430 {
6431 	struct tog_reflist_entry *next, *last;
6432 	int n = 0;
6433 
6434 	if (s->first_displayed_entry)
6435 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6436 	else
6437 		next = TAILQ_FIRST(&s->refs);
6438 
6439 	last = s->last_displayed_entry;
6440 	while (next && last && n++ < maxscroll) {
6441 		last = TAILQ_NEXT(last, entry);
6442 		if (last) {
6443 			s->first_displayed_entry = next;
6444 			next = TAILQ_NEXT(next, entry);
6445 		}
6446 	}
6447 }
6448 
6449 static const struct got_error *
6450 search_start_ref_view(struct tog_view *view)
6451 {
6452 	struct tog_ref_view_state *s = &view->state.ref;
6453 
6454 	s->matched_entry = NULL;
6455 	return NULL;
6456 }
6457 
6458 static int
6459 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6460 {
6461 	regmatch_t regmatch;
6462 
6463 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6464 	    0) == 0;
6465 }
6466 
6467 static const struct got_error *
6468 search_next_ref_view(struct tog_view *view)
6469 {
6470 	struct tog_ref_view_state *s = &view->state.ref;
6471 	struct tog_reflist_entry *re = NULL;
6472 
6473 	if (!view->searching) {
6474 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6475 		return NULL;
6476 	}
6477 
6478 	if (s->matched_entry) {
6479 		if (view->searching == TOG_SEARCH_FORWARD) {
6480 			if (s->selected_entry)
6481 				re = TAILQ_NEXT(s->selected_entry, entry);
6482 			else
6483 				re = TAILQ_PREV(s->selected_entry,
6484 				    tog_reflist_head, entry);
6485 		} else {
6486 			if (s->selected_entry == NULL)
6487 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6488 			else
6489 				re = TAILQ_PREV(s->selected_entry,
6490 				    tog_reflist_head, entry);
6491 		}
6492 	} else {
6493 		if (s->selected_entry)
6494 			re = s->selected_entry;
6495 		else if (view->searching == TOG_SEARCH_FORWARD)
6496 			re = TAILQ_FIRST(&s->refs);
6497 		else
6498 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6499 	}
6500 
6501 	while (1) {
6502 		if (re == NULL) {
6503 			if (s->matched_entry == NULL) {
6504 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6505 				return NULL;
6506 			}
6507 			if (view->searching == TOG_SEARCH_FORWARD)
6508 				re = TAILQ_FIRST(&s->refs);
6509 			else
6510 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6511 		}
6512 
6513 		if (match_reflist_entry(re, &view->regex)) {
6514 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6515 			s->matched_entry = re;
6516 			break;
6517 		}
6518 
6519 		if (view->searching == TOG_SEARCH_FORWARD)
6520 			re = TAILQ_NEXT(re, entry);
6521 		else
6522 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6523 	}
6524 
6525 	if (s->matched_entry) {
6526 		s->first_displayed_entry = s->matched_entry;
6527 		s->selected = 0;
6528 	}
6529 
6530 	return NULL;
6531 }
6532 
6533 static const struct got_error *
6534 show_ref_view(struct tog_view *view)
6535 {
6536 	const struct got_error *err = NULL;
6537 	struct tog_ref_view_state *s = &view->state.ref;
6538 	struct tog_reflist_entry *re;
6539 	char *line = NULL;
6540 	wchar_t *wline;
6541 	struct tog_color *tc;
6542 	int width, n;
6543 	int limit = view->nlines;
6544 
6545 	werase(view->window);
6546 
6547 	s->ndisplayed = 0;
6548 
6549 	if (limit == 0)
6550 		return NULL;
6551 
6552 	re = s->first_displayed_entry;
6553 
6554 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6555 	    s->nrefs) == -1)
6556 		return got_error_from_errno("asprintf");
6557 
6558 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6559 	if (err) {
6560 		free(line);
6561 		return err;
6562 	}
6563 	if (view_needs_focus_indication(view))
6564 		wstandout(view->window);
6565 	waddwstr(view->window, wline);
6566 	if (view_needs_focus_indication(view))
6567 		wstandend(view->window);
6568 	free(wline);
6569 	wline = NULL;
6570 	free(line);
6571 	line = NULL;
6572 	if (width < view->ncols - 1)
6573 		waddch(view->window, '\n');
6574 	if (--limit <= 0)
6575 		return NULL;
6576 
6577 	n = 0;
6578 	while (re && limit > 0) {
6579 		char *line = NULL;
6580 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6581 
6582 		if (s->show_date) {
6583 			struct got_commit_object *ci;
6584 			struct got_tag_object *tag;
6585 			struct got_object_id *id;
6586 			struct tm tm;
6587 			time_t t;
6588 
6589 			err = got_ref_resolve(&id, s->repo, re->ref);
6590 			if (err)
6591 				return err;
6592 			err = got_object_open_as_tag(&tag, s->repo, id);
6593 			if (err) {
6594 				if (err->code != GOT_ERR_OBJ_TYPE) {
6595 					free(id);
6596 					return err;
6597 				}
6598 				err = got_object_open_as_commit(&ci, s->repo,
6599 				    id);
6600 				if (err) {
6601 					free(id);
6602 					return err;
6603 				}
6604 				t = got_object_commit_get_committer_time(ci);
6605 				got_object_commit_close(ci);
6606 			} else {
6607 				t = got_object_tag_get_tagger_time(tag);
6608 				got_object_tag_close(tag);
6609 			}
6610 			free(id);
6611 			if (gmtime_r(&t, &tm) == NULL)
6612 				return got_error_from_errno("gmtime_r");
6613 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6614 				return got_error(GOT_ERR_NO_SPACE);
6615 		}
6616 		if (got_ref_is_symbolic(re->ref)) {
6617 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6618 			    ymd : "", got_ref_get_name(re->ref),
6619 			    got_ref_get_symref_target(re->ref)) == -1)
6620 				return got_error_from_errno("asprintf");
6621 		} else if (s->show_ids) {
6622 			struct got_object_id *id;
6623 			char *id_str;
6624 			err = got_ref_resolve(&id, s->repo, re->ref);
6625 			if (err)
6626 				return err;
6627 			err = got_object_id_str(&id_str, id);
6628 			if (err) {
6629 				free(id);
6630 				return err;
6631 			}
6632 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6633 			    got_ref_get_name(re->ref), id_str) == -1) {
6634 				err = got_error_from_errno("asprintf");
6635 				free(id);
6636 				free(id_str);
6637 				return err;
6638 			}
6639 			free(id);
6640 			free(id_str);
6641 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6642 		    got_ref_get_name(re->ref)) == -1)
6643 			return got_error_from_errno("asprintf");
6644 
6645 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6646 		    0, 0);
6647 		if (err) {
6648 			free(line);
6649 			return err;
6650 		}
6651 		if (n == s->selected) {
6652 			if (view->focussed)
6653 				wstandout(view->window);
6654 			s->selected_entry = re;
6655 		}
6656 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6657 		if (tc)
6658 			wattr_on(view->window,
6659 			    COLOR_PAIR(tc->colorpair), NULL);
6660 		waddwstr(view->window, wline);
6661 		if (tc)
6662 			wattr_off(view->window,
6663 			    COLOR_PAIR(tc->colorpair), NULL);
6664 		if (width < view->ncols - 1)
6665 			waddch(view->window, '\n');
6666 		if (n == s->selected && view->focussed)
6667 			wstandend(view->window);
6668 		free(line);
6669 		free(wline);
6670 		wline = NULL;
6671 		n++;
6672 		s->ndisplayed++;
6673 		s->last_displayed_entry = re;
6674 
6675 		limit--;
6676 		re = TAILQ_NEXT(re, entry);
6677 	}
6678 
6679 	view_vborder(view);
6680 	return err;
6681 }
6682 
6683 static const struct got_error *
6684 browse_ref_tree(struct tog_view **new_view, int begin_x,
6685     struct tog_reflist_entry *re, struct got_repository *repo)
6686 {
6687 	const struct got_error *err = NULL;
6688 	struct got_object_id *commit_id = NULL;
6689 	struct tog_view *tree_view;
6690 
6691 	*new_view = NULL;
6692 
6693 	err = resolve_reflist_entry(&commit_id, re, repo);
6694 	if (err) {
6695 		if (err->code != GOT_ERR_OBJ_TYPE)
6696 			return err;
6697 		else
6698 			return NULL;
6699 	}
6700 
6701 
6702 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6703 	if (tree_view == NULL) {
6704 		err = got_error_from_errno("view_open");
6705 		goto done;
6706 	}
6707 
6708 	err = open_tree_view(tree_view, commit_id,
6709 	    got_ref_get_name(re->ref), repo);
6710 	if (err)
6711 		goto done;
6712 
6713 	*new_view = tree_view;
6714 done:
6715 	free(commit_id);
6716 	return err;
6717 }
6718 static const struct got_error *
6719 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6720 {
6721 	const struct got_error *err = NULL;
6722 	struct tog_ref_view_state *s = &view->state.ref;
6723 	struct tog_view *log_view, *tree_view;
6724 	struct tog_reflist_entry *re;
6725 	int begin_x = 0, n, nscroll = view->nlines - 1;
6726 
6727 	switch (ch) {
6728 	case 'i':
6729 		s->show_ids = !s->show_ids;
6730 		break;
6731 	case 'm':
6732 		s->show_date = !s->show_date;
6733 		break;
6734 	case 'o':
6735 		s->sort_by_date = !s->sort_by_date;
6736 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6737 		    got_ref_cmp_by_commit_timestamp_descending :
6738 		    tog_ref_cmp_by_name, s->repo);
6739 		if (err)
6740 			break;
6741 		got_reflist_object_id_map_free(tog_refs_idmap);
6742 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6743 		    &tog_refs, s->repo);
6744 		if (err)
6745 			break;
6746 		ref_view_free_refs(s);
6747 		err = ref_view_load_refs(s);
6748 		break;
6749 	case KEY_ENTER:
6750 	case '\r':
6751 		if (!s->selected_entry)
6752 			break;
6753 		if (view_is_parent_view(view))
6754 			begin_x = view_split_begin_x(view->begin_x);
6755 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6756 		    s->repo);
6757 		view->focussed = 0;
6758 		log_view->focussed = 1;
6759 		if (view_is_parent_view(view)) {
6760 			err = view_close_child(view);
6761 			if (err)
6762 				return err;
6763 			err = view_set_child(view, log_view);
6764 			if (err)
6765 				return err;
6766 			view->focus_child = 1;
6767 		} else
6768 			*new_view = log_view;
6769 		break;
6770 	case 't':
6771 		if (!s->selected_entry)
6772 			break;
6773 		if (view_is_parent_view(view))
6774 			begin_x = view_split_begin_x(view->begin_x);
6775 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6776 		    s->repo);
6777 		if (err || tree_view == NULL)
6778 			break;
6779 		view->focussed = 0;
6780 		tree_view->focussed = 1;
6781 		if (view_is_parent_view(view)) {
6782 			err = view_close_child(view);
6783 			if (err)
6784 				return err;
6785 			err = view_set_child(view, tree_view);
6786 			if (err)
6787 				return err;
6788 			view->focus_child = 1;
6789 		} else
6790 			*new_view = tree_view;
6791 		break;
6792 	case 'g':
6793 	case KEY_HOME:
6794 		s->selected = 0;
6795 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6796 		break;
6797 	case 'G':
6798 	case KEY_END:
6799 		s->selected = 0;
6800 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6801 		for (n = 0; n < view->nlines - 1; n++) {
6802 			if (re == NULL)
6803 				break;
6804 			s->first_displayed_entry = re;
6805 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6806 		}
6807 		if (n > 0)
6808 			s->selected = n - 1;
6809 		break;
6810 	case 'k':
6811 	case KEY_UP:
6812 	case CTRL('p'):
6813 		if (s->selected > 0) {
6814 			s->selected--;
6815 			break;
6816 		}
6817 		ref_scroll_up(s, 1);
6818 		break;
6819 	case CTRL('u'):
6820 	case 'u':
6821 		nscroll /= 2;
6822 		/* FALL THROUGH */
6823 	case KEY_PPAGE:
6824 	case CTRL('b'):
6825 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6826 			s->selected -= MIN(nscroll, s->selected);
6827 		ref_scroll_up(s, MAX(0, nscroll));
6828 		break;
6829 	case 'j':
6830 	case KEY_DOWN:
6831 	case CTRL('n'):
6832 		if (s->selected < s->ndisplayed - 1) {
6833 			s->selected++;
6834 			break;
6835 		}
6836 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6837 			/* can't scroll any further */
6838 			break;
6839 		ref_scroll_down(s, 1);
6840 		break;
6841 	case CTRL('d'):
6842 	case 'd':
6843 		nscroll /= 2;
6844 		/* FALL THROUGH */
6845 	case KEY_NPAGE:
6846 	case CTRL('f'):
6847 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6848 			/* can't scroll any further; move cursor down */
6849 			if (s->selected < s->ndisplayed - 1)
6850 				s->selected += MIN(nscroll,
6851 				    s->ndisplayed - s->selected - 1);
6852 			break;
6853 		}
6854 		ref_scroll_down(s, nscroll);
6855 		break;
6856 	case CTRL('l'):
6857 		tog_free_refs();
6858 		err = tog_load_refs(s->repo, s->sort_by_date);
6859 		if (err)
6860 			break;
6861 		ref_view_free_refs(s);
6862 		err = ref_view_load_refs(s);
6863 		break;
6864 	case KEY_RESIZE:
6865 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6866 			s->selected = view->nlines - 2;
6867 		break;
6868 	default:
6869 		break;
6870 	}
6871 
6872 	return err;
6873 }
6874 
6875 __dead static void
6876 usage_ref(void)
6877 {
6878 	endwin();
6879 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6880 	    getprogname());
6881 	exit(1);
6882 }
6883 
6884 static const struct got_error *
6885 cmd_ref(int argc, char *argv[])
6886 {
6887 	const struct got_error *error;
6888 	struct got_repository *repo = NULL;
6889 	struct got_worktree *worktree = NULL;
6890 	char *cwd = NULL, *repo_path = NULL;
6891 	int ch;
6892 	struct tog_view *view;
6893 	int *pack_fds = NULL;
6894 
6895 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6896 		switch (ch) {
6897 		case 'r':
6898 			repo_path = realpath(optarg, NULL);
6899 			if (repo_path == NULL)
6900 				return got_error_from_errno2("realpath",
6901 				    optarg);
6902 			break;
6903 		default:
6904 			usage_ref();
6905 			/* NOTREACHED */
6906 		}
6907 	}
6908 
6909 	argc -= optind;
6910 	argv += optind;
6911 
6912 	if (argc > 1)
6913 		usage_ref();
6914 
6915 	error = got_repo_pack_fds_open(&pack_fds);
6916 	if (error != NULL)
6917 		goto done;
6918 
6919 	if (repo_path == NULL) {
6920 		cwd = getcwd(NULL, 0);
6921 		if (cwd == NULL)
6922 			return got_error_from_errno("getcwd");
6923 		error = got_worktree_open(&worktree, cwd);
6924 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6925 			goto done;
6926 		if (worktree)
6927 			repo_path =
6928 			    strdup(got_worktree_get_repo_path(worktree));
6929 		else
6930 			repo_path = strdup(cwd);
6931 		if (repo_path == NULL) {
6932 			error = got_error_from_errno("strdup");
6933 			goto done;
6934 		}
6935 	}
6936 
6937 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6938 	if (error != NULL)
6939 		goto done;
6940 
6941 	init_curses();
6942 
6943 	error = apply_unveil(got_repo_get_path(repo), NULL);
6944 	if (error)
6945 		goto done;
6946 
6947 	error = tog_load_refs(repo, 0);
6948 	if (error)
6949 		goto done;
6950 
6951 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6952 	if (view == NULL) {
6953 		error = got_error_from_errno("view_open");
6954 		goto done;
6955 	}
6956 
6957 	error = open_ref_view(view, repo);
6958 	if (error)
6959 		goto done;
6960 
6961 	if (worktree) {
6962 		/* Release work tree lock. */
6963 		got_worktree_close(worktree);
6964 		worktree = NULL;
6965 	}
6966 	error = view_loop(view);
6967 done:
6968 	free(repo_path);
6969 	free(cwd);
6970 	if (repo) {
6971 		const struct got_error *close_err = got_repo_close(repo);
6972 		if (close_err)
6973 			error = close_err;
6974 	}
6975 	if (pack_fds) {
6976 		const struct got_error *pack_err =
6977 		    got_repo_pack_fds_close(pack_fds);
6978 		if (error == NULL)
6979 			error = pack_err;
6980 	}
6981 	tog_free_refs();
6982 	return error;
6983 }
6984 
6985 static void
6986 list_commands(FILE *fp)
6987 {
6988 	size_t i;
6989 
6990 	fprintf(fp, "commands:");
6991 	for (i = 0; i < nitems(tog_commands); i++) {
6992 		const struct tog_cmd *cmd = &tog_commands[i];
6993 		fprintf(fp, " %s", cmd->name);
6994 	}
6995 	fputc('\n', fp);
6996 }
6997 
6998 __dead static void
6999 usage(int hflag, int status)
7000 {
7001 	FILE *fp = (status == 0) ? stdout : stderr;
7002 
7003 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7004 	    getprogname());
7005 	if (hflag) {
7006 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7007 		list_commands(fp);
7008 	}
7009 	exit(status);
7010 }
7011 
7012 static char **
7013 make_argv(int argc, ...)
7014 {
7015 	va_list ap;
7016 	char **argv;
7017 	int i;
7018 
7019 	va_start(ap, argc);
7020 
7021 	argv = calloc(argc, sizeof(char *));
7022 	if (argv == NULL)
7023 		err(1, "calloc");
7024 	for (i = 0; i < argc; i++) {
7025 		argv[i] = strdup(va_arg(ap, char *));
7026 		if (argv[i] == NULL)
7027 			err(1, "strdup");
7028 	}
7029 
7030 	va_end(ap);
7031 	return argv;
7032 }
7033 
7034 /*
7035  * Try to convert 'tog path' into a 'tog log path' command.
7036  * The user could simply have mistyped the command rather than knowingly
7037  * provided a path. So check whether argv[0] can in fact be resolved
7038  * to a path in the HEAD commit and print a special error if not.
7039  * This hack is for mpi@ <3
7040  */
7041 static const struct got_error *
7042 tog_log_with_path(int argc, char *argv[])
7043 {
7044 	const struct got_error *error = NULL, *close_err;
7045 	const struct tog_cmd *cmd = NULL;
7046 	struct got_repository *repo = NULL;
7047 	struct got_worktree *worktree = NULL;
7048 	struct got_object_id *commit_id = NULL, *id = NULL;
7049 	struct got_commit_object *commit = NULL;
7050 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7051 	char *commit_id_str = NULL, **cmd_argv = NULL;
7052 	int *pack_fds = NULL;
7053 
7054 	cwd = getcwd(NULL, 0);
7055 	if (cwd == NULL)
7056 		return got_error_from_errno("getcwd");
7057 
7058 	error = got_repo_pack_fds_open(&pack_fds);
7059 	if (error != NULL)
7060 		goto done;
7061 
7062 	error = got_worktree_open(&worktree, cwd);
7063 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7064 		goto done;
7065 
7066 	if (worktree)
7067 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7068 	else
7069 		repo_path = strdup(cwd);
7070 	if (repo_path == NULL) {
7071 		error = got_error_from_errno("strdup");
7072 		goto done;
7073 	}
7074 
7075 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7076 	if (error != NULL)
7077 		goto done;
7078 
7079 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7080 	    repo, worktree);
7081 	if (error)
7082 		goto done;
7083 
7084 	error = tog_load_refs(repo, 0);
7085 	if (error)
7086 		goto done;
7087 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7088 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7089 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7090 	if (error)
7091 		goto done;
7092 
7093 	if (worktree) {
7094 		got_worktree_close(worktree);
7095 		worktree = NULL;
7096 	}
7097 
7098 	error = got_object_open_as_commit(&commit, repo, commit_id);
7099 	if (error)
7100 		goto done;
7101 
7102 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7103 	if (error) {
7104 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7105 			goto done;
7106 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7107 		    getprogname(), argv[0]);
7108 		usage(1, 1);
7109 		/* not reached */
7110 	}
7111 
7112 	close_err = got_repo_close(repo);
7113 	if (error == NULL)
7114 		error = close_err;
7115 	repo = NULL;
7116 
7117 	error = got_object_id_str(&commit_id_str, commit_id);
7118 	if (error)
7119 		goto done;
7120 
7121 	cmd = &tog_commands[0]; /* log */
7122 	argc = 4;
7123 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7124 	error = cmd->cmd_main(argc, cmd_argv);
7125 done:
7126 	if (repo) {
7127 		close_err = got_repo_close(repo);
7128 		if (error == NULL)
7129 			error = close_err;
7130 	}
7131 	if (commit)
7132 		got_object_commit_close(commit);
7133 	if (worktree)
7134 		got_worktree_close(worktree);
7135 	if (pack_fds) {
7136 		const struct got_error *pack_err =
7137 		    got_repo_pack_fds_close(pack_fds);
7138 		if (error == NULL)
7139 			error = pack_err;
7140 	}
7141 	free(id);
7142 	free(commit_id_str);
7143 	free(commit_id);
7144 	free(cwd);
7145 	free(repo_path);
7146 	free(in_repo_path);
7147 	if (cmd_argv) {
7148 		int i;
7149 		for (i = 0; i < argc; i++)
7150 			free(cmd_argv[i]);
7151 		free(cmd_argv);
7152 	}
7153 	tog_free_refs();
7154 	return error;
7155 }
7156 
7157 int
7158 main(int argc, char *argv[])
7159 {
7160 	const struct got_error *error = NULL;
7161 	const struct tog_cmd *cmd = NULL;
7162 	int ch, hflag = 0, Vflag = 0;
7163 	char **cmd_argv = NULL;
7164 	static const struct option longopts[] = {
7165 	    { "version", no_argument, NULL, 'V' },
7166 	    { NULL, 0, NULL, 0}
7167 	};
7168 
7169 	setlocale(LC_CTYPE, "");
7170 
7171 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7172 		switch (ch) {
7173 		case 'h':
7174 			hflag = 1;
7175 			break;
7176 		case 'V':
7177 			Vflag = 1;
7178 			break;
7179 		default:
7180 			usage(hflag, 1);
7181 			/* NOTREACHED */
7182 		}
7183 	}
7184 
7185 	argc -= optind;
7186 	argv += optind;
7187 	optind = 1;
7188 	optreset = 1;
7189 
7190 	if (Vflag) {
7191 		got_version_print_str();
7192 		return 0;
7193 	}
7194 
7195 #ifndef PROFILE
7196 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7197 	    NULL) == -1)
7198 		err(1, "pledge");
7199 #endif
7200 
7201 	if (argc == 0) {
7202 		if (hflag)
7203 			usage(hflag, 0);
7204 		/* Build an argument vector which runs a default command. */
7205 		cmd = &tog_commands[0];
7206 		argc = 1;
7207 		cmd_argv = make_argv(argc, cmd->name);
7208 	} else {
7209 		size_t i;
7210 
7211 		/* Did the user specify a command? */
7212 		for (i = 0; i < nitems(tog_commands); i++) {
7213 			if (strncmp(tog_commands[i].name, argv[0],
7214 			    strlen(argv[0])) == 0) {
7215 				cmd = &tog_commands[i];
7216 				break;
7217 			}
7218 		}
7219 	}
7220 
7221 	if (cmd == NULL) {
7222 		if (argc != 1)
7223 			usage(0, 1);
7224 		/* No command specified; try log with a path */
7225 		error = tog_log_with_path(argc, argv);
7226 	} else {
7227 		if (hflag)
7228 			cmd->cmd_usage();
7229 		else
7230 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7231 	}
7232 
7233 	endwin();
7234 	putchar('\n');
7235 	if (cmd_argv) {
7236 		int i;
7237 		for (i = 0; i < argc; i++)
7238 			free(cmd_argv[i]);
7239 		free(cmd_argv);
7240 	}
7241 
7242 	if (error && error->code != GOT_ERR_CANCELLED)
7243 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7244 	return 0;
7245 }