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 		int matched_idx = s->matched_entry->idx;
2346 		int selected_idx = s->selected_entry->idx;
2347 
2348 		/*
2349 		 * If user has moved cursor after we hit the match, position
2350 		 * from where we should continue search must be changed.
2351 		 */
2352 		if (view->searching == TOG_SEARCH_FORWARD)
2353 			if (matched_idx > selected_idx)
2354 				entry = TAILQ_NEXT(s->selected_entry, entry);
2355 			else
2356 				entry = TAILQ_NEXT(s->matched_entry, entry);
2357 		else
2358 			if (matched_idx < selected_idx)
2359 				entry = TAILQ_PREV(s->selected_entry,
2360 						commit_queue_head, entry);
2361 			else
2362 				entry = TAILQ_PREV(s->matched_entry,
2363 						commit_queue_head, entry);
2364 	} else {
2365 		entry = s->selected_entry;
2366 	}
2367 
2368 	while (1) {
2369 		int have_match = 0;
2370 
2371 		if (entry == NULL) {
2372 			if (s->thread_args.log_complete ||
2373 			    view->searching == TOG_SEARCH_BACKWARD) {
2374 				view->search_next_done =
2375 				    (s->matched_entry == NULL ?
2376 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2377 				s->search_entry = NULL;
2378 				return NULL;
2379 			}
2380 			/*
2381 			 * Poke the log thread for more commits and return,
2382 			 * allowing the main loop to make progress. Search
2383 			 * will resume at s->search_entry once we come back.
2384 			 */
2385 			s->thread_args.commits_needed++;
2386 			return trigger_log_thread(view, 0);
2387 		}
2388 
2389 		err = match_commit(&have_match, entry->id, entry->commit,
2390 		    &view->regex);
2391 		if (err)
2392 			break;
2393 		if (have_match) {
2394 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2395 			s->matched_entry = entry;
2396 			break;
2397 		}
2398 
2399 		s->search_entry = entry;
2400 		if (view->searching == TOG_SEARCH_FORWARD)
2401 			entry = TAILQ_NEXT(entry, entry);
2402 		else
2403 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2404 	}
2405 
2406 	if (s->matched_entry) {
2407 		int cur = s->selected_entry->idx;
2408 		while (cur < s->matched_entry->idx) {
2409 			err = input_log_view(NULL, view, KEY_DOWN);
2410 			if (err)
2411 				return err;
2412 			cur++;
2413 		}
2414 		while (cur > s->matched_entry->idx) {
2415 			err = input_log_view(NULL, view, KEY_UP);
2416 			if (err)
2417 				return err;
2418 			cur--;
2419 		}
2420 	}
2421 
2422 	s->search_entry = NULL;
2423 
2424 	return NULL;
2425 }
2426 
2427 static const struct got_error *
2428 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2429     struct got_repository *repo, const char *head_ref_name,
2430     const char *in_repo_path, int log_branches)
2431 {
2432 	const struct got_error *err = NULL;
2433 	struct tog_log_view_state *s = &view->state.log;
2434 	struct got_repository *thread_repo = NULL;
2435 	struct got_commit_graph *thread_graph = NULL;
2436 	int errcode;
2437 
2438 	if (in_repo_path != s->in_repo_path) {
2439 		free(s->in_repo_path);
2440 		s->in_repo_path = strdup(in_repo_path);
2441 		if (s->in_repo_path == NULL)
2442 			return got_error_from_errno("strdup");
2443 	}
2444 
2445 	/* The commit queue only contains commits being displayed. */
2446 	TAILQ_INIT(&s->commits.head);
2447 	s->commits.ncommits = 0;
2448 
2449 	s->repo = repo;
2450 	if (head_ref_name) {
2451 		s->head_ref_name = strdup(head_ref_name);
2452 		if (s->head_ref_name == NULL) {
2453 			err = got_error_from_errno("strdup");
2454 			goto done;
2455 		}
2456 	}
2457 	s->start_id = got_object_id_dup(start_id);
2458 	if (s->start_id == NULL) {
2459 		err = got_error_from_errno("got_object_id_dup");
2460 		goto done;
2461 	}
2462 	s->log_branches = log_branches;
2463 
2464 	STAILQ_INIT(&s->colors);
2465 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2466 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2467 		    get_color_value("TOG_COLOR_COMMIT"));
2468 		if (err)
2469 			goto done;
2470 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2471 		    get_color_value("TOG_COLOR_AUTHOR"));
2472 		if (err) {
2473 			free_colors(&s->colors);
2474 			goto done;
2475 		}
2476 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2477 		    get_color_value("TOG_COLOR_DATE"));
2478 		if (err) {
2479 			free_colors(&s->colors);
2480 			goto done;
2481 		}
2482 	}
2483 
2484 	view->show = show_log_view;
2485 	view->input = input_log_view;
2486 	view->close = close_log_view;
2487 	view->search_start = search_start_log_view;
2488 	view->search_next = search_next_log_view;
2489 
2490 	if (s->thread_args.pack_fds == NULL) {
2491 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2492 		if (err)
2493 			goto done;
2494 	}
2495 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2496 	    s->thread_args.pack_fds);
2497 	if (err)
2498 		goto done;
2499 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2500 	    !s->log_branches);
2501 	if (err)
2502 		goto done;
2503 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2504 	    s->repo, NULL, NULL);
2505 	if (err)
2506 		goto done;
2507 
2508 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2509 	if (errcode) {
2510 		err = got_error_set_errno(errcode, "pthread_cond_init");
2511 		goto done;
2512 	}
2513 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2514 	if (errcode) {
2515 		err = got_error_set_errno(errcode, "pthread_cond_init");
2516 		goto done;
2517 	}
2518 
2519 	s->thread_args.commits_needed = view->nlines;
2520 	s->thread_args.graph = thread_graph;
2521 	s->thread_args.commits = &s->commits;
2522 	s->thread_args.in_repo_path = s->in_repo_path;
2523 	s->thread_args.start_id = s->start_id;
2524 	s->thread_args.repo = thread_repo;
2525 	s->thread_args.log_complete = 0;
2526 	s->thread_args.quit = &s->quit;
2527 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2528 	s->thread_args.selected_entry = &s->selected_entry;
2529 	s->thread_args.searching = &view->searching;
2530 	s->thread_args.search_next_done = &view->search_next_done;
2531 	s->thread_args.regex = &view->regex;
2532 done:
2533 	if (err)
2534 		close_log_view(view);
2535 	return err;
2536 }
2537 
2538 static const struct got_error *
2539 show_log_view(struct tog_view *view)
2540 {
2541 	const struct got_error *err;
2542 	struct tog_log_view_state *s = &view->state.log;
2543 
2544 	if (s->thread == NULL) {
2545 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2546 		    &s->thread_args);
2547 		if (errcode)
2548 			return got_error_set_errno(errcode, "pthread_create");
2549 		if (s->thread_args.commits_needed > 0) {
2550 			err = trigger_log_thread(view, 1);
2551 			if (err)
2552 				return err;
2553 		}
2554 	}
2555 
2556 	return draw_commits(view);
2557 }
2558 
2559 static const struct got_error *
2560 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2561 {
2562 	const struct got_error *err = NULL;
2563 	struct tog_log_view_state *s = &view->state.log;
2564 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2565 	struct tog_view *ref_view = NULL;
2566 	struct commit_queue_entry *entry;
2567 	int begin_x = 0, n, nscroll = view->nlines - 1;
2568 
2569 	if (s->thread_args.load_all) {
2570 		if (ch == KEY_BACKSPACE)
2571 			s->thread_args.load_all = 0;
2572 		else if (s->thread_args.log_complete) {
2573 			s->thread_args.load_all = 0;
2574 			log_scroll_down(view, s->commits.ncommits);
2575 			s->selected = MIN(view->nlines - 2,
2576 			    s->commits.ncommits - 1);
2577 			select_commit(s);
2578 		}
2579 		return NULL;
2580 	}
2581 
2582 	switch (ch) {
2583 	case 'q':
2584 		s->quit = 1;
2585 		break;
2586 	case '0':
2587 		view->x = 0;
2588 		break;
2589 	case '$':
2590 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2591 		break;
2592 	case KEY_RIGHT:
2593 	case 'l':
2594 		if (view->x + view->ncols / 2 < view->maxx)
2595 			view->x += 2;  /* move two columns right */
2596 		break;
2597 	case KEY_LEFT:
2598 	case 'h':
2599 		view->x -= MIN(view->x, 2);  /* move two columns back */
2600 		break;
2601 	case 'k':
2602 	case KEY_UP:
2603 	case '<':
2604 	case ',':
2605 	case CTRL('p'):
2606 		if (s->first_displayed_entry == NULL)
2607 			break;
2608 		if (s->selected > 0)
2609 			s->selected--;
2610 		else
2611 			log_scroll_up(s, 1);
2612 		select_commit(s);
2613 		break;
2614 	case 'g':
2615 	case KEY_HOME:
2616 		s->selected = 0;
2617 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2618 		select_commit(s);
2619 		break;
2620 	case CTRL('u'):
2621 	case 'u':
2622 		nscroll /= 2;
2623 		/* FALL THROUGH */
2624 	case KEY_PPAGE:
2625 	case CTRL('b'):
2626 		if (s->first_displayed_entry == NULL)
2627 			break;
2628 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2629 			s->selected = MAX(0, s->selected - nscroll - 1);
2630 		else
2631 			log_scroll_up(s, nscroll);
2632 		select_commit(s);
2633 		break;
2634 	case 'j':
2635 	case KEY_DOWN:
2636 	case '>':
2637 	case '.':
2638 	case CTRL('n'):
2639 		if (s->first_displayed_entry == NULL)
2640 			break;
2641 		if (s->selected < MIN(view->nlines - 2,
2642 		    s->commits.ncommits - 1))
2643 			s->selected++;
2644 		else {
2645 			err = log_scroll_down(view, 1);
2646 			if (err)
2647 				break;
2648 		}
2649 		select_commit(s);
2650 		break;
2651 	case 'G':
2652 	case KEY_END: {
2653 		/* We don't know yet how many commits, so we're forced to
2654 		 * traverse them all. */
2655 		if (!s->thread_args.log_complete) {
2656 			s->thread_args.load_all = 1;
2657 			return trigger_log_thread(view, 0);
2658 		}
2659 
2660 		s->selected = 0;
2661 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2662 		for (n = 0; n < view->nlines - 1; n++) {
2663 			if (entry == NULL)
2664 				break;
2665 			s->first_displayed_entry = entry;
2666 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2667 		}
2668 		if (n > 0)
2669 			s->selected = n - 1;
2670 		select_commit(s);
2671 		break;
2672 	}
2673 	case CTRL('d'):
2674 	case 'd':
2675 		nscroll /= 2;
2676 		/* FALL THROUGH */
2677 	case KEY_NPAGE:
2678 	case CTRL('f'): {
2679 		struct commit_queue_entry *first;
2680 		first = s->first_displayed_entry;
2681 		if (first == NULL)
2682 			break;
2683 		err = log_scroll_down(view, nscroll);
2684 		if (err)
2685 			break;
2686 		if (first == s->first_displayed_entry &&
2687 		    s->selected < MIN(view->nlines - 2,
2688 		    s->commits.ncommits - 1)) {
2689 			/* can't scroll further down */
2690 			s->selected += MIN(s->last_displayed_entry->idx -
2691 			    s->selected_entry->idx, nscroll + 1);
2692 		}
2693 		select_commit(s);
2694 		break;
2695 	}
2696 	case KEY_RESIZE:
2697 		if (s->selected > view->nlines - 2)
2698 			s->selected = view->nlines - 2;
2699 		if (s->selected > s->commits.ncommits - 1)
2700 			s->selected = s->commits.ncommits - 1;
2701 		select_commit(s);
2702 		if (s->commits.ncommits < view->nlines - 1 &&
2703 		    !s->thread_args.log_complete) {
2704 			s->thread_args.commits_needed += (view->nlines - 1) -
2705 			    s->commits.ncommits;
2706 			err = trigger_log_thread(view, 1);
2707 		}
2708 		break;
2709 	case KEY_ENTER:
2710 	case ' ':
2711 	case '\r':
2712 		if (s->selected_entry == NULL)
2713 			break;
2714 		if (view_is_parent_view(view))
2715 			begin_x = view_split_begin_x(view->begin_x);
2716 		err = open_diff_view_for_commit(&diff_view, begin_x,
2717 		    s->selected_entry->commit, s->selected_entry->id,
2718 		    view, s->repo);
2719 		if (err)
2720 			break;
2721 		view->focussed = 0;
2722 		diff_view->focussed = 1;
2723 		if (view_is_parent_view(view)) {
2724 			err = view_close_child(view);
2725 			if (err)
2726 				return err;
2727 			err = view_set_child(view, diff_view);
2728 			if (err)
2729 				return err;
2730 			view->focus_child = 1;
2731 		} else
2732 			*new_view = diff_view;
2733 		break;
2734 	case 't':
2735 		if (s->selected_entry == NULL)
2736 			break;
2737 		if (view_is_parent_view(view))
2738 			begin_x = view_split_begin_x(view->begin_x);
2739 		err = browse_commit_tree(&tree_view, begin_x,
2740 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2741 		    s->repo);
2742 		if (err)
2743 			break;
2744 		view->focussed = 0;
2745 		tree_view->focussed = 1;
2746 		if (view_is_parent_view(view)) {
2747 			err = view_close_child(view);
2748 			if (err)
2749 				return err;
2750 			err = view_set_child(view, tree_view);
2751 			if (err)
2752 				return err;
2753 			view->focus_child = 1;
2754 		} else
2755 			*new_view = tree_view;
2756 		break;
2757 	case KEY_BACKSPACE:
2758 	case CTRL('l'):
2759 	case 'B':
2760 		if (ch == KEY_BACKSPACE &&
2761 		    got_path_is_root_dir(s->in_repo_path))
2762 			break;
2763 		err = stop_log_thread(s);
2764 		if (err)
2765 			return err;
2766 		if (ch == KEY_BACKSPACE) {
2767 			char *parent_path;
2768 			err = got_path_dirname(&parent_path, s->in_repo_path);
2769 			if (err)
2770 				return err;
2771 			free(s->in_repo_path);
2772 			s->in_repo_path = parent_path;
2773 			s->thread_args.in_repo_path = s->in_repo_path;
2774 		} else if (ch == CTRL('l')) {
2775 			struct got_object_id *start_id;
2776 			err = got_repo_match_object_id(&start_id, NULL,
2777 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2778 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2779 			if (err)
2780 				return err;
2781 			free(s->start_id);
2782 			s->start_id = start_id;
2783 			s->thread_args.start_id = s->start_id;
2784 		} else /* 'B' */
2785 			s->log_branches = !s->log_branches;
2786 
2787 		if (s->thread_args.pack_fds == NULL) {
2788 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2789 			if (err)
2790 				return err;
2791 		}
2792 		err = got_repo_open(&s->thread_args.repo,
2793 		    got_repo_get_path(s->repo), NULL,
2794 		    s->thread_args.pack_fds);
2795 		if (err)
2796 			return err;
2797 		tog_free_refs();
2798 		err = tog_load_refs(s->repo, 0);
2799 		if (err)
2800 			return err;
2801 		err = got_commit_graph_open(&s->thread_args.graph,
2802 		    s->in_repo_path, !s->log_branches);
2803 		if (err)
2804 			return err;
2805 		err = got_commit_graph_iter_start(s->thread_args.graph,
2806 		    s->start_id, s->repo, NULL, NULL);
2807 		if (err)
2808 			return err;
2809 		free_commits(&s->commits);
2810 		s->first_displayed_entry = NULL;
2811 		s->last_displayed_entry = NULL;
2812 		s->selected_entry = NULL;
2813 		s->selected = 0;
2814 		s->thread_args.log_complete = 0;
2815 		s->quit = 0;
2816 		s->thread_args.commits_needed = view->nlines;
2817 		s->matched_entry = NULL;
2818 		s->search_entry = NULL;
2819 		break;
2820 	case 'r':
2821 		if (view_is_parent_view(view))
2822 			begin_x = view_split_begin_x(view->begin_x);
2823 		ref_view = view_open(view->nlines, view->ncols,
2824 		    view->begin_y, begin_x, TOG_VIEW_REF);
2825 		if (ref_view == NULL)
2826 			return got_error_from_errno("view_open");
2827 		err = open_ref_view(ref_view, s->repo);
2828 		if (err) {
2829 			view_close(ref_view);
2830 			return err;
2831 		}
2832 		view->focussed = 0;
2833 		ref_view->focussed = 1;
2834 		if (view_is_parent_view(view)) {
2835 			err = view_close_child(view);
2836 			if (err)
2837 				return err;
2838 			err = view_set_child(view, ref_view);
2839 			if (err)
2840 				return err;
2841 			view->focus_child = 1;
2842 		} else
2843 			*new_view = ref_view;
2844 		break;
2845 	default:
2846 		break;
2847 	}
2848 
2849 	return err;
2850 }
2851 
2852 static const struct got_error *
2853 apply_unveil(const char *repo_path, const char *worktree_path)
2854 {
2855 	const struct got_error *error;
2856 
2857 #ifdef PROFILE
2858 	if (unveil("gmon.out", "rwc") != 0)
2859 		return got_error_from_errno2("unveil", "gmon.out");
2860 #endif
2861 	if (repo_path && unveil(repo_path, "r") != 0)
2862 		return got_error_from_errno2("unveil", repo_path);
2863 
2864 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2865 		return got_error_from_errno2("unveil", worktree_path);
2866 
2867 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2868 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2869 
2870 	error = got_privsep_unveil_exec_helpers();
2871 	if (error != NULL)
2872 		return error;
2873 
2874 	if (unveil(NULL, NULL) != 0)
2875 		return got_error_from_errno("unveil");
2876 
2877 	return NULL;
2878 }
2879 
2880 static void
2881 init_curses(void)
2882 {
2883 	/*
2884 	 * Override default signal handlers before starting ncurses.
2885 	 * This should prevent ncurses from installing its own
2886 	 * broken cleanup() signal handler.
2887 	 */
2888 	signal(SIGWINCH, tog_sigwinch);
2889 	signal(SIGPIPE, tog_sigpipe);
2890 	signal(SIGCONT, tog_sigcont);
2891 	signal(SIGINT, tog_sigint);
2892 	signal(SIGTERM, tog_sigterm);
2893 
2894 	initscr();
2895 	cbreak();
2896 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2897 	noecho();
2898 	nonl();
2899 	intrflush(stdscr, FALSE);
2900 	keypad(stdscr, TRUE);
2901 	curs_set(0);
2902 	if (getenv("TOG_COLORS") != NULL) {
2903 		start_color();
2904 		use_default_colors();
2905 	}
2906 }
2907 
2908 static const struct got_error *
2909 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2910     struct got_repository *repo, struct got_worktree *worktree)
2911 {
2912 	const struct got_error *err = NULL;
2913 
2914 	if (argc == 0) {
2915 		*in_repo_path = strdup("/");
2916 		if (*in_repo_path == NULL)
2917 			return got_error_from_errno("strdup");
2918 		return NULL;
2919 	}
2920 
2921 	if (worktree) {
2922 		const char *prefix = got_worktree_get_path_prefix(worktree);
2923 		char *p;
2924 
2925 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2926 		if (err)
2927 			return err;
2928 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2929 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2930 		    p) == -1) {
2931 			err = got_error_from_errno("asprintf");
2932 			*in_repo_path = NULL;
2933 		}
2934 		free(p);
2935 	} else
2936 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2937 
2938 	return err;
2939 }
2940 
2941 static const struct got_error *
2942 cmd_log(int argc, char *argv[])
2943 {
2944 	const struct got_error *error;
2945 	struct got_repository *repo = NULL;
2946 	struct got_worktree *worktree = NULL;
2947 	struct got_object_id *start_id = NULL;
2948 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2949 	char *start_commit = NULL, *label = NULL;
2950 	struct got_reference *ref = NULL;
2951 	const char *head_ref_name = NULL;
2952 	int ch, log_branches = 0;
2953 	struct tog_view *view;
2954 	int *pack_fds = NULL;
2955 
2956 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2957 		switch (ch) {
2958 		case 'b':
2959 			log_branches = 1;
2960 			break;
2961 		case 'c':
2962 			start_commit = optarg;
2963 			break;
2964 		case 'r':
2965 			repo_path = realpath(optarg, NULL);
2966 			if (repo_path == NULL)
2967 				return got_error_from_errno2("realpath",
2968 				    optarg);
2969 			break;
2970 		default:
2971 			usage_log();
2972 			/* NOTREACHED */
2973 		}
2974 	}
2975 
2976 	argc -= optind;
2977 	argv += optind;
2978 
2979 	if (argc > 1)
2980 		usage_log();
2981 
2982 	error = got_repo_pack_fds_open(&pack_fds);
2983 	if (error != NULL)
2984 		goto done;
2985 
2986 	if (repo_path == NULL) {
2987 		cwd = getcwd(NULL, 0);
2988 		if (cwd == NULL)
2989 			return got_error_from_errno("getcwd");
2990 		error = got_worktree_open(&worktree, cwd);
2991 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2992 			goto done;
2993 		if (worktree)
2994 			repo_path =
2995 			    strdup(got_worktree_get_repo_path(worktree));
2996 		else
2997 			repo_path = strdup(cwd);
2998 		if (repo_path == NULL) {
2999 			error = got_error_from_errno("strdup");
3000 			goto done;
3001 		}
3002 	}
3003 
3004 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3005 	if (error != NULL)
3006 		goto done;
3007 
3008 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3009 	    repo, worktree);
3010 	if (error)
3011 		goto done;
3012 
3013 	init_curses();
3014 
3015 	error = apply_unveil(got_repo_get_path(repo),
3016 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3017 	if (error)
3018 		goto done;
3019 
3020 	/* already loaded by tog_log_with_path()? */
3021 	if (TAILQ_EMPTY(&tog_refs)) {
3022 		error = tog_load_refs(repo, 0);
3023 		if (error)
3024 			goto done;
3025 	}
3026 
3027 	if (start_commit == NULL) {
3028 		error = got_repo_match_object_id(&start_id, &label,
3029 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3030 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3031 		if (error)
3032 			goto done;
3033 		head_ref_name = label;
3034 	} else {
3035 		error = got_ref_open(&ref, repo, start_commit, 0);
3036 		if (error == NULL)
3037 			head_ref_name = got_ref_get_name(ref);
3038 		else if (error->code != GOT_ERR_NOT_REF)
3039 			goto done;
3040 		error = got_repo_match_object_id(&start_id, NULL,
3041 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3042 		if (error)
3043 			goto done;
3044 	}
3045 
3046 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3047 	if (view == NULL) {
3048 		error = got_error_from_errno("view_open");
3049 		goto done;
3050 	}
3051 	error = open_log_view(view, start_id, repo, head_ref_name,
3052 	    in_repo_path, log_branches);
3053 	if (error)
3054 		goto done;
3055 	if (worktree) {
3056 		/* Release work tree lock. */
3057 		got_worktree_close(worktree);
3058 		worktree = NULL;
3059 	}
3060 	error = view_loop(view);
3061 done:
3062 	free(in_repo_path);
3063 	free(repo_path);
3064 	free(cwd);
3065 	free(start_id);
3066 	free(label);
3067 	if (ref)
3068 		got_ref_close(ref);
3069 	if (repo) {
3070 		const struct got_error *close_err = got_repo_close(repo);
3071 		if (error == NULL)
3072 			error = close_err;
3073 	}
3074 	if (worktree)
3075 		got_worktree_close(worktree);
3076 	if (pack_fds) {
3077 		const struct got_error *pack_err =
3078 		    got_repo_pack_fds_close(pack_fds);
3079 		if (error == NULL)
3080 			error = pack_err;
3081 	}
3082 	tog_free_refs();
3083 	return error;
3084 }
3085 
3086 __dead static void
3087 usage_diff(void)
3088 {
3089 	endwin();
3090 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3091 	    "[-w] object1 object2\n", getprogname());
3092 	exit(1);
3093 }
3094 
3095 static int
3096 match_line(const char *line, regex_t *regex, size_t nmatch,
3097     regmatch_t *regmatch)
3098 {
3099 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3100 }
3101 
3102 struct tog_color *
3103 match_color(struct tog_colors *colors, const char *line)
3104 {
3105 	struct tog_color *tc = NULL;
3106 
3107 	STAILQ_FOREACH(tc, colors, entry) {
3108 		if (match_line(line, &tc->regex, 0, NULL))
3109 			return tc;
3110 	}
3111 
3112 	return NULL;
3113 }
3114 
3115 static const struct got_error *
3116 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3117     WINDOW *window, int skipcol, regmatch_t *regmatch)
3118 {
3119 	const struct got_error *err = NULL;
3120 	char *exstr = NULL;
3121 	wchar_t *wline = NULL;
3122 	int rme, rms, n, width, scrollx;
3123 	int width0 = 0, width1 = 0, width2 = 0;
3124 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3125 
3126 	*wtotal = 0;
3127 
3128 	rms = regmatch->rm_so;
3129 	rme = regmatch->rm_eo;
3130 
3131 	err = expand_tab(&exstr, line);
3132 	if (err)
3133 		return err;
3134 
3135 	/* Split the line into 3 segments, according to match offsets. */
3136 	seg0 = strndup(exstr, rms);
3137 	if (seg0 == NULL) {
3138 		err = got_error_from_errno("strndup");
3139 		goto done;
3140 	}
3141 	seg1 = strndup(exstr + rms, rme - rms);
3142 	if (seg1 == NULL) {
3143 		err = got_error_from_errno("strndup");
3144 		goto done;
3145 	}
3146 	seg2 = strdup(exstr + rme);
3147 	if (seg2 == NULL) {
3148 		err = got_error_from_errno("strndup");
3149 		goto done;
3150 	}
3151 
3152 	/* draw up to matched token if we haven't scrolled past it */
3153 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3154 	    col_tab_align, 1);
3155 	if (err)
3156 		goto done;
3157 	n = MAX(width0 - skipcol, 0);
3158 	if (n) {
3159 		free(wline);
3160 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3161 		    wlimit, col_tab_align, 1);
3162 		if (err)
3163 			goto done;
3164 		waddwstr(window, &wline[scrollx]);
3165 		wlimit -= width;
3166 		*wtotal += width;
3167 	}
3168 
3169 	if (wlimit > 0) {
3170 		int i = 0, w = 0;
3171 		size_t wlen;
3172 
3173 		free(wline);
3174 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3175 		    col_tab_align, 1);
3176 		if (err)
3177 			goto done;
3178 		wlen = wcslen(wline);
3179 		while (i < wlen) {
3180 			width = wcwidth(wline[i]);
3181 			if (width == -1) {
3182 				/* should not happen, tabs are expanded */
3183 				err = got_error(GOT_ERR_RANGE);
3184 				goto done;
3185 			}
3186 			if (width0 + w + width > skipcol)
3187 				break;
3188 			w += width; 
3189 			i++;
3190 		}
3191 		/* draw (visible part of) matched token (if scrolled into it) */
3192 		if (width1 - w > 0) {
3193 			wattron(window, A_STANDOUT);
3194 			waddwstr(window, &wline[i]);
3195 			wattroff(window, A_STANDOUT);
3196 			wlimit -= (width1 - w);
3197 			*wtotal += (width1 - w);
3198 		}
3199 	}
3200 
3201 	if (wlimit > 0) {  /* draw rest of line */
3202 		free(wline);
3203 		if (skipcol > width0 + width1) {
3204 			err = format_line(&wline, &width2, &scrollx, seg2,
3205 			    skipcol - (width0 + width1), wlimit,
3206 			    col_tab_align, 1);
3207 			if (err)
3208 				goto done;
3209 			waddwstr(window, &wline[scrollx]);
3210 		} else {
3211 			err = format_line(&wline, &width2, NULL, seg2, 0,
3212 			    wlimit, col_tab_align, 1);
3213 			if (err)
3214 				goto done;
3215 			waddwstr(window, wline);
3216 		}
3217 		*wtotal += width2;
3218 	}
3219 done:
3220 	free(wline);
3221 	free(exstr);
3222 	free(seg0);
3223 	free(seg1);
3224 	free(seg2);
3225 	return err;
3226 }
3227 
3228 static const struct got_error *
3229 draw_file(struct tog_view *view, const char *header)
3230 {
3231 	struct tog_diff_view_state *s = &view->state.diff;
3232 	regmatch_t *regmatch = &view->regmatch;
3233 	const struct got_error *err;
3234 	int nprinted = 0;
3235 	char *line;
3236 	size_t linesize = 0;
3237 	ssize_t linelen;
3238 	struct tog_color *tc;
3239 	wchar_t *wline;
3240 	int width;
3241 	int max_lines = view->nlines;
3242 	int nlines = s->nlines;
3243 	off_t line_offset;
3244 
3245 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3246 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3247 		return got_error_from_errno("fseek");
3248 
3249 	werase(view->window);
3250 
3251 	if (header) {
3252 		if (asprintf(&line, "[%d/%d] %s",
3253 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3254 		    header) == -1)
3255 			return got_error_from_errno("asprintf");
3256 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3257 		    0, 0);
3258 		free(line);
3259 		if (err)
3260 			return err;
3261 
3262 		if (view_needs_focus_indication(view))
3263 			wstandout(view->window);
3264 		waddwstr(view->window, wline);
3265 		free(wline);
3266 		wline = NULL;
3267 		if (view_needs_focus_indication(view))
3268 			wstandend(view->window);
3269 		if (width <= view->ncols - 1)
3270 			waddch(view->window, '\n');
3271 
3272 		if (max_lines <= 1)
3273 			return NULL;
3274 		max_lines--;
3275 	}
3276 
3277 	s->eof = 0;
3278 	view->maxx = 0;
3279 	line = NULL;
3280 	while (max_lines > 0 && nprinted < max_lines) {
3281 		linelen = getline(&line, &linesize, s->f);
3282 		if (linelen == -1) {
3283 			if (feof(s->f)) {
3284 				s->eof = 1;
3285 				break;
3286 			}
3287 			free(line);
3288 			return got_ferror(s->f, GOT_ERR_IO);
3289 		}
3290 
3291 		/* Set view->maxx based on full line length. */
3292 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3293 		    view->x ? 1 : 0);
3294 		if (err) {
3295 			free(line);
3296 			return err;
3297 		}
3298 		view->maxx = MAX(view->maxx, width);
3299 		free(wline);
3300 		wline = NULL;
3301 
3302 		tc = match_color(&s->colors, line);
3303 		if (tc)
3304 			wattr_on(view->window,
3305 			    COLOR_PAIR(tc->colorpair), NULL);
3306 		if (s->first_displayed_line + nprinted == s->matched_line &&
3307 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3308 			err = add_matched_line(&width, line, view->ncols, 0,
3309 			    view->window, view->x, regmatch);
3310 			if (err) {
3311 				free(line);
3312 				return err;
3313 			}
3314 		} else {
3315 			int skip;
3316 			err = format_line(&wline, &width, &skip, line,
3317 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3318 			if (err) {
3319 				free(line);
3320 				return err;
3321 			}
3322 			waddwstr(view->window, &wline[skip]);
3323 			free(wline);
3324 			wline = NULL;
3325 		}
3326 		if (tc)
3327 			wattr_off(view->window,
3328 			    COLOR_PAIR(tc->colorpair), NULL);
3329 		if (width <= view->ncols - 1)
3330 			waddch(view->window, '\n');
3331 		nprinted++;
3332 	}
3333 	free(line);
3334 	if (nprinted >= 1)
3335 		s->last_displayed_line = s->first_displayed_line +
3336 		    (nprinted - 1);
3337 	else
3338 		s->last_displayed_line = s->first_displayed_line;
3339 
3340 	view_vborder(view);
3341 
3342 	if (s->eof) {
3343 		while (nprinted < view->nlines) {
3344 			waddch(view->window, '\n');
3345 			nprinted++;
3346 		}
3347 
3348 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3349 		    view->ncols, 0, 0);
3350 		if (err) {
3351 			return err;
3352 		}
3353 
3354 		wstandout(view->window);
3355 		waddwstr(view->window, wline);
3356 		free(wline);
3357 		wline = NULL;
3358 		wstandend(view->window);
3359 	}
3360 
3361 	return NULL;
3362 }
3363 
3364 static char *
3365 get_datestr(time_t *time, char *datebuf)
3366 {
3367 	struct tm mytm, *tm;
3368 	char *p, *s;
3369 
3370 	tm = gmtime_r(time, &mytm);
3371 	if (tm == NULL)
3372 		return NULL;
3373 	s = asctime_r(tm, datebuf);
3374 	if (s == NULL)
3375 		return NULL;
3376 	p = strchr(s, '\n');
3377 	if (p)
3378 		*p = '\0';
3379 	return s;
3380 }
3381 
3382 static const struct got_error *
3383 get_changed_paths(struct got_pathlist_head *paths,
3384     struct got_commit_object *commit, struct got_repository *repo)
3385 {
3386 	const struct got_error *err = NULL;
3387 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3388 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3389 	struct got_object_qid *qid;
3390 
3391 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3392 	if (qid != NULL) {
3393 		struct got_commit_object *pcommit;
3394 		err = got_object_open_as_commit(&pcommit, repo,
3395 		    &qid->id);
3396 		if (err)
3397 			return err;
3398 
3399 		tree_id1 = got_object_id_dup(
3400 		    got_object_commit_get_tree_id(pcommit));
3401 		if (tree_id1 == NULL) {
3402 			got_object_commit_close(pcommit);
3403 			return got_error_from_errno("got_object_id_dup");
3404 		}
3405 		got_object_commit_close(pcommit);
3406 
3407 	}
3408 
3409 	if (tree_id1) {
3410 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3411 		if (err)
3412 			goto done;
3413 	}
3414 
3415 	tree_id2 = got_object_commit_get_tree_id(commit);
3416 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3417 	if (err)
3418 		goto done;
3419 
3420 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3421 	    got_diff_tree_collect_changed_paths, paths, 0);
3422 done:
3423 	if (tree1)
3424 		got_object_tree_close(tree1);
3425 	if (tree2)
3426 		got_object_tree_close(tree2);
3427 	free(tree_id1);
3428 	return err;
3429 }
3430 
3431 static const struct got_error *
3432 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3433 {
3434 	off_t *p;
3435 
3436 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3437 	if (p == NULL)
3438 		return got_error_from_errno("reallocarray");
3439 	*line_offsets = p;
3440 	(*line_offsets)[*nlines] = off;
3441 	(*nlines)++;
3442 	return NULL;
3443 }
3444 
3445 static const struct got_error *
3446 write_commit_info(off_t **line_offsets, size_t *nlines,
3447     struct got_object_id *commit_id, struct got_reflist_head *refs,
3448     struct got_repository *repo, FILE *outfile)
3449 {
3450 	const struct got_error *err = NULL;
3451 	char datebuf[26], *datestr;
3452 	struct got_commit_object *commit;
3453 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3454 	time_t committer_time;
3455 	const char *author, *committer;
3456 	char *refs_str = NULL;
3457 	struct got_pathlist_head changed_paths;
3458 	struct got_pathlist_entry *pe;
3459 	off_t outoff = 0;
3460 	int n;
3461 
3462 	TAILQ_INIT(&changed_paths);
3463 
3464 	if (refs) {
3465 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3466 		if (err)
3467 			return err;
3468 	}
3469 
3470 	err = got_object_open_as_commit(&commit, repo, commit_id);
3471 	if (err)
3472 		return err;
3473 
3474 	err = got_object_id_str(&id_str, commit_id);
3475 	if (err) {
3476 		err = got_error_from_errno("got_object_id_str");
3477 		goto done;
3478 	}
3479 
3480 	err = add_line_offset(line_offsets, nlines, 0);
3481 	if (err)
3482 		goto done;
3483 
3484 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3485 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3486 	if (n < 0) {
3487 		err = got_error_from_errno("fprintf");
3488 		goto done;
3489 	}
3490 	outoff += n;
3491 	err = add_line_offset(line_offsets, nlines, outoff);
3492 	if (err)
3493 		goto done;
3494 
3495 	n = fprintf(outfile, "from: %s\n",
3496 	    got_object_commit_get_author(commit));
3497 	if (n < 0) {
3498 		err = got_error_from_errno("fprintf");
3499 		goto done;
3500 	}
3501 	outoff += n;
3502 	err = add_line_offset(line_offsets, nlines, outoff);
3503 	if (err)
3504 		goto done;
3505 
3506 	committer_time = got_object_commit_get_committer_time(commit);
3507 	datestr = get_datestr(&committer_time, datebuf);
3508 	if (datestr) {
3509 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3510 		if (n < 0) {
3511 			err = got_error_from_errno("fprintf");
3512 			goto done;
3513 		}
3514 		outoff += n;
3515 		err = add_line_offset(line_offsets, nlines, outoff);
3516 		if (err)
3517 			goto done;
3518 	}
3519 	author = got_object_commit_get_author(commit);
3520 	committer = got_object_commit_get_committer(commit);
3521 	if (strcmp(author, committer) != 0) {
3522 		n = fprintf(outfile, "via: %s\n", committer);
3523 		if (n < 0) {
3524 			err = got_error_from_errno("fprintf");
3525 			goto done;
3526 		}
3527 		outoff += n;
3528 		err = add_line_offset(line_offsets, nlines, outoff);
3529 		if (err)
3530 			goto done;
3531 	}
3532 	if (got_object_commit_get_nparents(commit) > 1) {
3533 		const struct got_object_id_queue *parent_ids;
3534 		struct got_object_qid *qid;
3535 		int pn = 1;
3536 		parent_ids = got_object_commit_get_parent_ids(commit);
3537 		STAILQ_FOREACH(qid, parent_ids, entry) {
3538 			err = got_object_id_str(&id_str, &qid->id);
3539 			if (err)
3540 				goto done;
3541 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3542 			if (n < 0) {
3543 				err = got_error_from_errno("fprintf");
3544 				goto done;
3545 			}
3546 			outoff += n;
3547 			err = add_line_offset(line_offsets, nlines, outoff);
3548 			if (err)
3549 				goto done;
3550 			free(id_str);
3551 			id_str = NULL;
3552 		}
3553 	}
3554 
3555 	err = got_object_commit_get_logmsg(&logmsg, commit);
3556 	if (err)
3557 		goto done;
3558 	s = logmsg;
3559 	while ((line = strsep(&s, "\n")) != NULL) {
3560 		n = fprintf(outfile, "%s\n", line);
3561 		if (n < 0) {
3562 			err = got_error_from_errno("fprintf");
3563 			goto done;
3564 		}
3565 		outoff += n;
3566 		err = add_line_offset(line_offsets, nlines, outoff);
3567 		if (err)
3568 			goto done;
3569 	}
3570 
3571 	err = get_changed_paths(&changed_paths, commit, repo);
3572 	if (err)
3573 		goto done;
3574 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3575 		struct got_diff_changed_path *cp = pe->data;
3576 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3577 		if (n < 0) {
3578 			err = got_error_from_errno("fprintf");
3579 			goto done;
3580 		}
3581 		outoff += n;
3582 		err = add_line_offset(line_offsets, nlines, outoff);
3583 		if (err)
3584 			goto done;
3585 		free((char *)pe->path);
3586 		free(pe->data);
3587 	}
3588 
3589 	fputc('\n', outfile);
3590 	outoff++;
3591 	err = add_line_offset(line_offsets, nlines, outoff);
3592 done:
3593 	got_pathlist_free(&changed_paths);
3594 	free(id_str);
3595 	free(logmsg);
3596 	free(refs_str);
3597 	got_object_commit_close(commit);
3598 	if (err) {
3599 		free(*line_offsets);
3600 		*line_offsets = NULL;
3601 		*nlines = 0;
3602 	}
3603 	return err;
3604 }
3605 
3606 static const struct got_error *
3607 create_diff(struct tog_diff_view_state *s)
3608 {
3609 	const struct got_error *err = NULL;
3610 	FILE *f = NULL;
3611 	int obj_type;
3612 
3613 	free(s->line_offsets);
3614 	s->line_offsets = malloc(sizeof(off_t));
3615 	if (s->line_offsets == NULL)
3616 		return got_error_from_errno("malloc");
3617 	s->nlines = 0;
3618 
3619 	f = got_opentemp();
3620 	if (f == NULL) {
3621 		err = got_error_from_errno("got_opentemp");
3622 		goto done;
3623 	}
3624 	if (s->f && fclose(s->f) == EOF) {
3625 		err = got_error_from_errno("fclose");
3626 		goto done;
3627 	}
3628 	s->f = f;
3629 
3630 	if (s->id1)
3631 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3632 	else
3633 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3634 	if (err)
3635 		goto done;
3636 
3637 	switch (obj_type) {
3638 	case GOT_OBJ_TYPE_BLOB:
3639 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3640 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3641 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3642 		    s->repo, s->f);
3643 		break;
3644 	case GOT_OBJ_TYPE_TREE:
3645 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3646 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3647 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3648 		break;
3649 	case GOT_OBJ_TYPE_COMMIT: {
3650 		const struct got_object_id_queue *parent_ids;
3651 		struct got_object_qid *pid;
3652 		struct got_commit_object *commit2;
3653 		struct got_reflist_head *refs;
3654 
3655 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3656 		if (err)
3657 			goto done;
3658 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3659 		/* Show commit info if we're diffing to a parent/root commit. */
3660 		if (s->id1 == NULL) {
3661 			err = write_commit_info(&s->line_offsets, &s->nlines,
3662 			    s->id2, refs, s->repo, s->f);
3663 			if (err)
3664 				goto done;
3665 		} else {
3666 			parent_ids = got_object_commit_get_parent_ids(commit2);
3667 			STAILQ_FOREACH(pid, parent_ids, entry) {
3668 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3669 					err = write_commit_info(
3670 					    &s->line_offsets, &s->nlines,
3671 					    s->id2, refs, s->repo, s->f);
3672 					if (err)
3673 						goto done;
3674 					break;
3675 				}
3676 			}
3677 		}
3678 		got_object_commit_close(commit2);
3679 
3680 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3681 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3682 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3683 		break;
3684 	}
3685 	default:
3686 		err = got_error(GOT_ERR_OBJ_TYPE);
3687 		break;
3688 	}
3689 	if (err)
3690 		goto done;
3691 done:
3692 	if (s->f && fflush(s->f) != 0 && err == NULL)
3693 		err = got_error_from_errno("fflush");
3694 	return err;
3695 }
3696 
3697 static void
3698 diff_view_indicate_progress(struct tog_view *view)
3699 {
3700 	mvwaddstr(view->window, 0, 0, "diffing...");
3701 	update_panels();
3702 	doupdate();
3703 }
3704 
3705 static const struct got_error *
3706 search_start_diff_view(struct tog_view *view)
3707 {
3708 	struct tog_diff_view_state *s = &view->state.diff;
3709 
3710 	s->matched_line = 0;
3711 	return NULL;
3712 }
3713 
3714 static const struct got_error *
3715 search_next_diff_view(struct tog_view *view)
3716 {
3717 	struct tog_diff_view_state *s = &view->state.diff;
3718 	const struct got_error *err = NULL;
3719 	int lineno;
3720 	char *line = NULL;
3721 	size_t linesize = 0;
3722 	ssize_t linelen;
3723 
3724 	if (!view->searching) {
3725 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3726 		return NULL;
3727 	}
3728 
3729 	if (s->matched_line) {
3730 		if (view->searching == TOG_SEARCH_FORWARD)
3731 			lineno = s->matched_line + 1;
3732 		else
3733 			lineno = s->matched_line - 1;
3734 	} else
3735 		lineno = s->first_displayed_line;
3736 
3737 	while (1) {
3738 		off_t offset;
3739 
3740 		if (lineno <= 0 || lineno > s->nlines) {
3741 			if (s->matched_line == 0) {
3742 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3743 				break;
3744 			}
3745 
3746 			if (view->searching == TOG_SEARCH_FORWARD)
3747 				lineno = 1;
3748 			else
3749 				lineno = s->nlines;
3750 		}
3751 
3752 		offset = s->line_offsets[lineno - 1];
3753 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3754 			free(line);
3755 			return got_error_from_errno("fseeko");
3756 		}
3757 		linelen = getline(&line, &linesize, s->f);
3758 		if (linelen != -1) {
3759 			char *exstr;
3760 			err = expand_tab(&exstr, line);
3761 			if (err)
3762 				break;
3763 			if (match_line(exstr, &view->regex, 1,
3764 			    &view->regmatch)) {
3765 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3766 				s->matched_line = lineno;
3767 				free(exstr);
3768 				break;
3769 			}
3770 			free(exstr);
3771 		}
3772 		if (view->searching == TOG_SEARCH_FORWARD)
3773 			lineno++;
3774 		else
3775 			lineno--;
3776 	}
3777 	free(line);
3778 
3779 	if (s->matched_line) {
3780 		s->first_displayed_line = s->matched_line;
3781 		s->selected_line = 1;
3782 	}
3783 
3784 	return err;
3785 }
3786 
3787 static const struct got_error *
3788 close_diff_view(struct tog_view *view)
3789 {
3790 	const struct got_error *err = NULL;
3791 	struct tog_diff_view_state *s = &view->state.diff;
3792 
3793 	free(s->id1);
3794 	s->id1 = NULL;
3795 	free(s->id2);
3796 	s->id2 = NULL;
3797 	if (s->f && fclose(s->f) == EOF)
3798 		err = got_error_from_errno("fclose");
3799 	s->f = NULL;
3800 	if (s->f1 && fclose(s->f1) == EOF)
3801 		err = got_error_from_errno("fclose");
3802 	s->f1 = NULL;
3803 	if (s->f2 && fclose(s->f2) == EOF)
3804 		err = got_error_from_errno("fclose");
3805 	s->f2 = NULL;
3806 	free_colors(&s->colors);
3807 	free(s->line_offsets);
3808 	s->line_offsets = NULL;
3809 	s->nlines = 0;
3810 	return err;
3811 }
3812 
3813 static const struct got_error *
3814 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3815     struct got_object_id *id2, const char *label1, const char *label2,
3816     int diff_context, int ignore_whitespace, int force_text_diff,
3817     struct tog_view *log_view, struct got_repository *repo)
3818 {
3819 	const struct got_error *err;
3820 	struct tog_diff_view_state *s = &view->state.diff;
3821 
3822 	memset(s, 0, sizeof(*s));
3823 
3824 	if (id1 != NULL && id2 != NULL) {
3825 	    int type1, type2;
3826 	    err = got_object_get_type(&type1, repo, id1);
3827 	    if (err)
3828 		return err;
3829 	    err = got_object_get_type(&type2, repo, id2);
3830 	    if (err)
3831 		return err;
3832 
3833 	    if (type1 != type2)
3834 		return got_error(GOT_ERR_OBJ_TYPE);
3835 	}
3836 	s->first_displayed_line = 1;
3837 	s->last_displayed_line = view->nlines;
3838 	s->selected_line = 1;
3839 	s->repo = repo;
3840 	s->id1 = id1;
3841 	s->id2 = id2;
3842 	s->label1 = label1;
3843 	s->label2 = label2;
3844 
3845 	if (id1) {
3846 		s->id1 = got_object_id_dup(id1);
3847 		if (s->id1 == NULL)
3848 			return got_error_from_errno("got_object_id_dup");
3849 	} else
3850 		s->id1 = NULL;
3851 
3852 	s->id2 = got_object_id_dup(id2);
3853 	if (s->id2 == NULL) {
3854 		err = got_error_from_errno("got_object_id_dup");
3855 		goto done;
3856 	}
3857 
3858 	s->f1 = got_opentemp();
3859 	if (s->f1 == NULL) {
3860 		err = got_error_from_errno("got_opentemp");
3861 		goto done;
3862 	}
3863 
3864 	s->f2 = got_opentemp();
3865 	if (s->f2 == NULL) {
3866 		err = got_error_from_errno("got_opentemp");
3867 		goto done;
3868 	}
3869 
3870 	s->first_displayed_line = 1;
3871 	s->last_displayed_line = view->nlines;
3872 	s->diff_context = diff_context;
3873 	s->ignore_whitespace = ignore_whitespace;
3874 	s->force_text_diff = force_text_diff;
3875 	s->log_view = log_view;
3876 	s->repo = repo;
3877 
3878 	STAILQ_INIT(&s->colors);
3879 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3880 		err = add_color(&s->colors,
3881 		    "^-", TOG_COLOR_DIFF_MINUS,
3882 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3883 		if (err)
3884 			goto done;
3885 		err = add_color(&s->colors, "^\\+",
3886 		    TOG_COLOR_DIFF_PLUS,
3887 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3888 		if (err)
3889 			goto done;
3890 		err = add_color(&s->colors,
3891 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3892 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3893 		if (err)
3894 			goto done;
3895 
3896 		err = add_color(&s->colors,
3897 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3898 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3899 		    get_color_value("TOG_COLOR_DIFF_META"));
3900 		if (err)
3901 			goto done;
3902 
3903 		err = add_color(&s->colors,
3904 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3905 		    get_color_value("TOG_COLOR_AUTHOR"));
3906 		if (err)
3907 			goto done;
3908 
3909 		err = add_color(&s->colors,
3910 		    "^date: ", TOG_COLOR_DATE,
3911 		    get_color_value("TOG_COLOR_DATE"));
3912 		if (err)
3913 			goto done;
3914 	}
3915 
3916 	if (log_view && view_is_splitscreen(view))
3917 		show_log_view(log_view); /* draw vborder */
3918 	diff_view_indicate_progress(view);
3919 
3920 	err = create_diff(s);
3921 
3922 	view->show = show_diff_view;
3923 	view->input = input_diff_view;
3924 	view->close = close_diff_view;
3925 	view->search_start = search_start_diff_view;
3926 	view->search_next = search_next_diff_view;
3927 done:
3928 	if (err)
3929 		close_diff_view(view);
3930 	return err;
3931 }
3932 
3933 static const struct got_error *
3934 show_diff_view(struct tog_view *view)
3935 {
3936 	const struct got_error *err;
3937 	struct tog_diff_view_state *s = &view->state.diff;
3938 	char *id_str1 = NULL, *id_str2, *header;
3939 	const char *label1, *label2;
3940 
3941 	if (s->id1) {
3942 		err = got_object_id_str(&id_str1, s->id1);
3943 		if (err)
3944 			return err;
3945 		label1 = s->label1 ? : id_str1;
3946 	} else
3947 		label1 = "/dev/null";
3948 
3949 	err = got_object_id_str(&id_str2, s->id2);
3950 	if (err)
3951 		return err;
3952 	label2 = s->label2 ? : id_str2;
3953 
3954 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3955 		err = got_error_from_errno("asprintf");
3956 		free(id_str1);
3957 		free(id_str2);
3958 		return err;
3959 	}
3960 	free(id_str1);
3961 	free(id_str2);
3962 
3963 	err = draw_file(view, header);
3964 	free(header);
3965 	return err;
3966 }
3967 
3968 static const struct got_error *
3969 set_selected_commit(struct tog_diff_view_state *s,
3970     struct commit_queue_entry *entry)
3971 {
3972 	const struct got_error *err;
3973 	const struct got_object_id_queue *parent_ids;
3974 	struct got_commit_object *selected_commit;
3975 	struct got_object_qid *pid;
3976 
3977 	free(s->id2);
3978 	s->id2 = got_object_id_dup(entry->id);
3979 	if (s->id2 == NULL)
3980 		return got_error_from_errno("got_object_id_dup");
3981 
3982 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3983 	if (err)
3984 		return err;
3985 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3986 	free(s->id1);
3987 	pid = STAILQ_FIRST(parent_ids);
3988 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3989 	got_object_commit_close(selected_commit);
3990 	return NULL;
3991 }
3992 
3993 static const struct got_error *
3994 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3995 {
3996 	const struct got_error *err = NULL;
3997 	struct tog_diff_view_state *s = &view->state.diff;
3998 	struct tog_log_view_state *ls;
3999 	struct commit_queue_entry *old_selected_entry;
4000 	char *line = NULL;
4001 	size_t linesize = 0;
4002 	ssize_t linelen;
4003 	int i, nscroll = view->nlines - 1;
4004 
4005 	switch (ch) {
4006 	case '0':
4007 		view->x = 0;
4008 		break;
4009 	case '$':
4010 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4011 		break;
4012 	case KEY_RIGHT:
4013 	case 'l':
4014 		if (view->x + view->ncols / 3 < view->maxx)
4015 			view->x += 2;  /* move two columns right */
4016 		break;
4017 	case KEY_LEFT:
4018 	case 'h':
4019 		view->x -= MIN(view->x, 2);  /* move two columns back */
4020 		break;
4021 	case 'a':
4022 	case 'w':
4023 		if (ch == 'a')
4024 			s->force_text_diff = !s->force_text_diff;
4025 		if (ch == 'w')
4026 			s->ignore_whitespace = !s->ignore_whitespace;
4027 		wclear(view->window);
4028 		s->first_displayed_line = 1;
4029 		s->last_displayed_line = view->nlines;
4030 		s->matched_line = 0;
4031 		diff_view_indicate_progress(view);
4032 		err = create_diff(s);
4033 		break;
4034 	case 'g':
4035 	case KEY_HOME:
4036 		s->first_displayed_line = 1;
4037 		break;
4038 	case 'G':
4039 	case KEY_END:
4040 		if (s->eof)
4041 			break;
4042 
4043 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4044 		s->eof = 1;
4045 		break;
4046 	case 'k':
4047 	case KEY_UP:
4048 	case CTRL('p'):
4049 		if (s->first_displayed_line > 1)
4050 			s->first_displayed_line--;
4051 		break;
4052 	case CTRL('u'):
4053 	case 'u':
4054 		nscroll /= 2;
4055 		/* FALL THROUGH */
4056 	case KEY_PPAGE:
4057 	case CTRL('b'):
4058 		if (s->first_displayed_line == 1)
4059 			break;
4060 		i = 0;
4061 		while (i++ < nscroll && s->first_displayed_line > 1)
4062 			s->first_displayed_line--;
4063 		break;
4064 	case 'j':
4065 	case KEY_DOWN:
4066 	case CTRL('n'):
4067 		if (!s->eof)
4068 			s->first_displayed_line++;
4069 		break;
4070 	case CTRL('d'):
4071 	case 'd':
4072 		nscroll /= 2;
4073 		/* FALL THROUGH */
4074 	case KEY_NPAGE:
4075 	case CTRL('f'):
4076 	case ' ':
4077 		if (s->eof)
4078 			break;
4079 		i = 0;
4080 		while (!s->eof && i++ < nscroll) {
4081 			linelen = getline(&line, &linesize, s->f);
4082 			s->first_displayed_line++;
4083 			if (linelen == -1) {
4084 				if (feof(s->f)) {
4085 					s->eof = 1;
4086 				} else
4087 					err = got_ferror(s->f, GOT_ERR_IO);
4088 				break;
4089 			}
4090 		}
4091 		free(line);
4092 		break;
4093 	case '[':
4094 		if (s->diff_context > 0) {
4095 			s->diff_context--;
4096 			s->matched_line = 0;
4097 			diff_view_indicate_progress(view);
4098 			err = create_diff(s);
4099 			if (s->first_displayed_line + view->nlines - 1 >
4100 			    s->nlines) {
4101 				s->first_displayed_line = 1;
4102 				s->last_displayed_line = view->nlines;
4103 			}
4104 		}
4105 		break;
4106 	case ']':
4107 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4108 			s->diff_context++;
4109 			s->matched_line = 0;
4110 			diff_view_indicate_progress(view);
4111 			err = create_diff(s);
4112 		}
4113 		break;
4114 	case '<':
4115 	case ',':
4116 		if (s->log_view == NULL)
4117 			break;
4118 		ls = &s->log_view->state.log;
4119 		old_selected_entry = ls->selected_entry;
4120 
4121 		err = input_log_view(NULL, s->log_view, KEY_UP);
4122 		if (err)
4123 			break;
4124 
4125 		if (old_selected_entry == ls->selected_entry)
4126 			break;
4127 
4128 		err = set_selected_commit(s, ls->selected_entry);
4129 		if (err)
4130 			break;
4131 
4132 		s->first_displayed_line = 1;
4133 		s->last_displayed_line = view->nlines;
4134 		s->matched_line = 0;
4135 		view->x = 0;
4136 
4137 		diff_view_indicate_progress(view);
4138 		err = create_diff(s);
4139 		break;
4140 	case '>':
4141 	case '.':
4142 		if (s->log_view == NULL)
4143 			break;
4144 		ls = &s->log_view->state.log;
4145 		old_selected_entry = ls->selected_entry;
4146 
4147 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4148 		if (err)
4149 			break;
4150 
4151 		if (old_selected_entry == ls->selected_entry)
4152 			break;
4153 
4154 		err = set_selected_commit(s, ls->selected_entry);
4155 		if (err)
4156 			break;
4157 
4158 		s->first_displayed_line = 1;
4159 		s->last_displayed_line = view->nlines;
4160 		s->matched_line = 0;
4161 		view->x = 0;
4162 
4163 		diff_view_indicate_progress(view);
4164 		err = create_diff(s);
4165 		break;
4166 	default:
4167 		break;
4168 	}
4169 
4170 	return err;
4171 }
4172 
4173 static const struct got_error *
4174 cmd_diff(int argc, char *argv[])
4175 {
4176 	const struct got_error *error = NULL;
4177 	struct got_repository *repo = NULL;
4178 	struct got_worktree *worktree = NULL;
4179 	struct got_object_id *id1 = NULL, *id2 = NULL;
4180 	char *repo_path = NULL, *cwd = NULL;
4181 	char *id_str1 = NULL, *id_str2 = NULL;
4182 	char *label1 = NULL, *label2 = NULL;
4183 	int diff_context = 3, ignore_whitespace = 0;
4184 	int ch, force_text_diff = 0;
4185 	const char *errstr;
4186 	struct tog_view *view;
4187 	int *pack_fds = NULL;
4188 
4189 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4190 		switch (ch) {
4191 		case 'a':
4192 			force_text_diff = 1;
4193 			break;
4194 		case 'C':
4195 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4196 			    &errstr);
4197 			if (errstr != NULL)
4198 				errx(1, "number of context lines is %s: %s",
4199 				    errstr, errstr);
4200 			break;
4201 		case 'r':
4202 			repo_path = realpath(optarg, NULL);
4203 			if (repo_path == NULL)
4204 				return got_error_from_errno2("realpath",
4205 				    optarg);
4206 			got_path_strip_trailing_slashes(repo_path);
4207 			break;
4208 		case 'w':
4209 			ignore_whitespace = 1;
4210 			break;
4211 		default:
4212 			usage_diff();
4213 			/* NOTREACHED */
4214 		}
4215 	}
4216 
4217 	argc -= optind;
4218 	argv += optind;
4219 
4220 	if (argc == 0) {
4221 		usage_diff(); /* TODO show local worktree changes */
4222 	} else if (argc == 2) {
4223 		id_str1 = argv[0];
4224 		id_str2 = argv[1];
4225 	} else
4226 		usage_diff();
4227 
4228 	error = got_repo_pack_fds_open(&pack_fds);
4229 	if (error)
4230 		goto done;
4231 
4232 	if (repo_path == NULL) {
4233 		cwd = getcwd(NULL, 0);
4234 		if (cwd == NULL)
4235 			return got_error_from_errno("getcwd");
4236 		error = got_worktree_open(&worktree, cwd);
4237 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4238 			goto done;
4239 		if (worktree)
4240 			repo_path =
4241 			    strdup(got_worktree_get_repo_path(worktree));
4242 		else
4243 			repo_path = strdup(cwd);
4244 		if (repo_path == NULL) {
4245 			error = got_error_from_errno("strdup");
4246 			goto done;
4247 		}
4248 	}
4249 
4250 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4251 	if (error)
4252 		goto done;
4253 
4254 	init_curses();
4255 
4256 	error = apply_unveil(got_repo_get_path(repo), NULL);
4257 	if (error)
4258 		goto done;
4259 
4260 	error = tog_load_refs(repo, 0);
4261 	if (error)
4262 		goto done;
4263 
4264 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4265 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4266 	if (error)
4267 		goto done;
4268 
4269 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4270 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4271 	if (error)
4272 		goto done;
4273 
4274 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4275 	if (view == NULL) {
4276 		error = got_error_from_errno("view_open");
4277 		goto done;
4278 	}
4279 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4280 	    ignore_whitespace, force_text_diff, NULL,  repo);
4281 	if (error)
4282 		goto done;
4283 	error = view_loop(view);
4284 done:
4285 	free(label1);
4286 	free(label2);
4287 	free(repo_path);
4288 	free(cwd);
4289 	if (repo) {
4290 		const struct got_error *close_err = got_repo_close(repo);
4291 		if (error == NULL)
4292 			error = close_err;
4293 	}
4294 	if (worktree)
4295 		got_worktree_close(worktree);
4296 	if (pack_fds) {
4297 		const struct got_error *pack_err =
4298 		    got_repo_pack_fds_close(pack_fds);
4299 		if (error == NULL)
4300 			error = pack_err;
4301 	}
4302 	tog_free_refs();
4303 	return error;
4304 }
4305 
4306 __dead static void
4307 usage_blame(void)
4308 {
4309 	endwin();
4310 	fprintf(stderr,
4311 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4312 	    getprogname());
4313 	exit(1);
4314 }
4315 
4316 struct tog_blame_line {
4317 	int annotated;
4318 	struct got_object_id *id;
4319 };
4320 
4321 static const struct got_error *
4322 draw_blame(struct tog_view *view)
4323 {
4324 	struct tog_blame_view_state *s = &view->state.blame;
4325 	struct tog_blame *blame = &s->blame;
4326 	regmatch_t *regmatch = &view->regmatch;
4327 	const struct got_error *err;
4328 	int lineno = 0, nprinted = 0;
4329 	char *line = NULL;
4330 	size_t linesize = 0;
4331 	ssize_t linelen;
4332 	wchar_t *wline;
4333 	int width;
4334 	struct tog_blame_line *blame_line;
4335 	struct got_object_id *prev_id = NULL;
4336 	char *id_str;
4337 	struct tog_color *tc;
4338 
4339 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4340 	if (err)
4341 		return err;
4342 
4343 	rewind(blame->f);
4344 	werase(view->window);
4345 
4346 	if (asprintf(&line, "commit %s", id_str) == -1) {
4347 		err = got_error_from_errno("asprintf");
4348 		free(id_str);
4349 		return err;
4350 	}
4351 
4352 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4353 	free(line);
4354 	line = NULL;
4355 	if (err)
4356 		return err;
4357 	if (view_needs_focus_indication(view))
4358 		wstandout(view->window);
4359 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4360 	if (tc)
4361 		wattr_on(view->window,
4362 		    COLOR_PAIR(tc->colorpair), NULL);
4363 	waddwstr(view->window, wline);
4364 	if (tc)
4365 		wattr_off(view->window,
4366 		    COLOR_PAIR(tc->colorpair), NULL);
4367 	if (view_needs_focus_indication(view))
4368 		wstandend(view->window);
4369 	free(wline);
4370 	wline = NULL;
4371 	if (width < view->ncols - 1)
4372 		waddch(view->window, '\n');
4373 
4374 	if (asprintf(&line, "[%d/%d] %s%s",
4375 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4376 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4377 		free(id_str);
4378 		return got_error_from_errno("asprintf");
4379 	}
4380 	free(id_str);
4381 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4382 	free(line);
4383 	line = NULL;
4384 	if (err)
4385 		return err;
4386 	waddwstr(view->window, wline);
4387 	free(wline);
4388 	wline = NULL;
4389 	if (width < view->ncols - 1)
4390 		waddch(view->window, '\n');
4391 
4392 	s->eof = 0;
4393 	view->maxx = 0;
4394 	while (nprinted < view->nlines - 2) {
4395 		linelen = getline(&line, &linesize, blame->f);
4396 		if (linelen == -1) {
4397 			if (feof(blame->f)) {
4398 				s->eof = 1;
4399 				break;
4400 			}
4401 			free(line);
4402 			return got_ferror(blame->f, GOT_ERR_IO);
4403 		}
4404 		if (++lineno < s->first_displayed_line)
4405 			continue;
4406 
4407 		/* Set view->maxx based on full line length. */
4408 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4409 		if (err) {
4410 			free(line);
4411 			return err;
4412 		}
4413 		free(wline);
4414 		wline = NULL;
4415 		view->maxx = MAX(view->maxx, width);
4416 
4417 		if (view->focussed && nprinted == s->selected_line - 1)
4418 			wstandout(view->window);
4419 
4420 		if (blame->nlines > 0) {
4421 			blame_line = &blame->lines[lineno - 1];
4422 			if (blame_line->annotated && prev_id &&
4423 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4424 			    !(view->focussed &&
4425 			    nprinted == s->selected_line - 1)) {
4426 				waddstr(view->window, "        ");
4427 			} else if (blame_line->annotated) {
4428 				char *id_str;
4429 				err = got_object_id_str(&id_str,
4430 				    blame_line->id);
4431 				if (err) {
4432 					free(line);
4433 					return err;
4434 				}
4435 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4436 				if (tc)
4437 					wattr_on(view->window,
4438 					    COLOR_PAIR(tc->colorpair), NULL);
4439 				wprintw(view->window, "%.8s", id_str);
4440 				if (tc)
4441 					wattr_off(view->window,
4442 					    COLOR_PAIR(tc->colorpair), NULL);
4443 				free(id_str);
4444 				prev_id = blame_line->id;
4445 			} else {
4446 				waddstr(view->window, "........");
4447 				prev_id = NULL;
4448 			}
4449 		} else {
4450 			waddstr(view->window, "........");
4451 			prev_id = NULL;
4452 		}
4453 
4454 		if (view->focussed && nprinted == s->selected_line - 1)
4455 			wstandend(view->window);
4456 		waddstr(view->window, " ");
4457 
4458 		if (view->ncols <= 9) {
4459 			width = 9;
4460 		} else if (s->first_displayed_line + nprinted ==
4461 		    s->matched_line &&
4462 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4463 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4464 			    view->window, view->x, regmatch);
4465 			if (err) {
4466 				free(line);
4467 				return err;
4468 			}
4469 			width += 9;
4470 		} else {
4471 			int skip;
4472 			err = format_line(&wline, &width, &skip, line,
4473 			    view->x, view->ncols - 9, 9, 1);
4474 			if (err) {
4475 				free(line);
4476 				return err;
4477 			}
4478 			waddwstr(view->window, &wline[skip]);
4479 			width += 9;
4480 			free(wline);
4481 			wline = NULL;
4482 		}
4483 
4484 		if (width <= view->ncols - 1)
4485 			waddch(view->window, '\n');
4486 		if (++nprinted == 1)
4487 			s->first_displayed_line = lineno;
4488 	}
4489 	free(line);
4490 	s->last_displayed_line = lineno;
4491 
4492 	view_vborder(view);
4493 
4494 	return NULL;
4495 }
4496 
4497 static const struct got_error *
4498 blame_cb(void *arg, int nlines, int lineno,
4499     struct got_commit_object *commit, struct got_object_id *id)
4500 {
4501 	const struct got_error *err = NULL;
4502 	struct tog_blame_cb_args *a = arg;
4503 	struct tog_blame_line *line;
4504 	int errcode;
4505 
4506 	if (nlines != a->nlines ||
4507 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4508 		return got_error(GOT_ERR_RANGE);
4509 
4510 	errcode = pthread_mutex_lock(&tog_mutex);
4511 	if (errcode)
4512 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4513 
4514 	if (*a->quit) {	/* user has quit the blame view */
4515 		err = got_error(GOT_ERR_ITER_COMPLETED);
4516 		goto done;
4517 	}
4518 
4519 	if (lineno == -1)
4520 		goto done; /* no change in this commit */
4521 
4522 	line = &a->lines[lineno - 1];
4523 	if (line->annotated)
4524 		goto done;
4525 
4526 	line->id = got_object_id_dup(id);
4527 	if (line->id == NULL) {
4528 		err = got_error_from_errno("got_object_id_dup");
4529 		goto done;
4530 	}
4531 	line->annotated = 1;
4532 done:
4533 	errcode = pthread_mutex_unlock(&tog_mutex);
4534 	if (errcode)
4535 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4536 	return err;
4537 }
4538 
4539 static void *
4540 blame_thread(void *arg)
4541 {
4542 	const struct got_error *err, *close_err;
4543 	struct tog_blame_thread_args *ta = arg;
4544 	struct tog_blame_cb_args *a = ta->cb_args;
4545 	int errcode;
4546 
4547 	err = block_signals_used_by_main_thread();
4548 	if (err)
4549 		return (void *)err;
4550 
4551 	err = got_blame(ta->path, a->commit_id, ta->repo,
4552 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4553 	if (err && err->code == GOT_ERR_CANCELLED)
4554 		err = NULL;
4555 
4556 	errcode = pthread_mutex_lock(&tog_mutex);
4557 	if (errcode)
4558 		return (void *)got_error_set_errno(errcode,
4559 		    "pthread_mutex_lock");
4560 
4561 	close_err = got_repo_close(ta->repo);
4562 	if (err == NULL)
4563 		err = close_err;
4564 	ta->repo = NULL;
4565 	*ta->complete = 1;
4566 
4567 	errcode = pthread_mutex_unlock(&tog_mutex);
4568 	if (errcode && err == NULL)
4569 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4570 
4571 	return (void *)err;
4572 }
4573 
4574 static struct got_object_id *
4575 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4576     int first_displayed_line, int selected_line)
4577 {
4578 	struct tog_blame_line *line;
4579 
4580 	if (nlines <= 0)
4581 		return NULL;
4582 
4583 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4584 	if (!line->annotated)
4585 		return NULL;
4586 
4587 	return line->id;
4588 }
4589 
4590 static const struct got_error *
4591 stop_blame(struct tog_blame *blame)
4592 {
4593 	const struct got_error *err = NULL;
4594 	int i;
4595 
4596 	if (blame->thread) {
4597 		int errcode;
4598 		errcode = pthread_mutex_unlock(&tog_mutex);
4599 		if (errcode)
4600 			return got_error_set_errno(errcode,
4601 			    "pthread_mutex_unlock");
4602 		errcode = pthread_join(blame->thread, (void **)&err);
4603 		if (errcode)
4604 			return got_error_set_errno(errcode, "pthread_join");
4605 		errcode = pthread_mutex_lock(&tog_mutex);
4606 		if (errcode)
4607 			return got_error_set_errno(errcode,
4608 			    "pthread_mutex_lock");
4609 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4610 			err = NULL;
4611 		blame->thread = NULL;
4612 	}
4613 	if (blame->thread_args.repo) {
4614 		const struct got_error *close_err;
4615 		close_err = got_repo_close(blame->thread_args.repo);
4616 		if (err == NULL)
4617 			err = close_err;
4618 		blame->thread_args.repo = NULL;
4619 	}
4620 	if (blame->f) {
4621 		if (fclose(blame->f) == EOF && err == NULL)
4622 			err = got_error_from_errno("fclose");
4623 		blame->f = NULL;
4624 	}
4625 	if (blame->lines) {
4626 		for (i = 0; i < blame->nlines; i++)
4627 			free(blame->lines[i].id);
4628 		free(blame->lines);
4629 		blame->lines = NULL;
4630 	}
4631 	free(blame->cb_args.commit_id);
4632 	blame->cb_args.commit_id = NULL;
4633 	if (blame->pack_fds) {
4634 		const struct got_error *pack_err =
4635 		    got_repo_pack_fds_close(blame->pack_fds);
4636 		if (err == NULL)
4637 			err = pack_err;
4638 		blame->pack_fds = NULL;
4639 	}
4640 	return err;
4641 }
4642 
4643 static const struct got_error *
4644 cancel_blame_view(void *arg)
4645 {
4646 	const struct got_error *err = NULL;
4647 	int *done = arg;
4648 	int errcode;
4649 
4650 	errcode = pthread_mutex_lock(&tog_mutex);
4651 	if (errcode)
4652 		return got_error_set_errno(errcode,
4653 		    "pthread_mutex_unlock");
4654 
4655 	if (*done)
4656 		err = got_error(GOT_ERR_CANCELLED);
4657 
4658 	errcode = pthread_mutex_unlock(&tog_mutex);
4659 	if (errcode)
4660 		return got_error_set_errno(errcode,
4661 		    "pthread_mutex_lock");
4662 
4663 	return err;
4664 }
4665 
4666 static const struct got_error *
4667 run_blame(struct tog_view *view)
4668 {
4669 	struct tog_blame_view_state *s = &view->state.blame;
4670 	struct tog_blame *blame = &s->blame;
4671 	const struct got_error *err = NULL;
4672 	struct got_commit_object *commit = NULL;
4673 	struct got_blob_object *blob = NULL;
4674 	struct got_repository *thread_repo = NULL;
4675 	struct got_object_id *obj_id = NULL;
4676 	int obj_type;
4677 	int *pack_fds = NULL;
4678 
4679 	err = got_object_open_as_commit(&commit, s->repo,
4680 	    &s->blamed_commit->id);
4681 	if (err)
4682 		return err;
4683 
4684 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4685 	if (err)
4686 		goto done;
4687 
4688 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4689 	if (err)
4690 		goto done;
4691 
4692 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4693 		err = got_error(GOT_ERR_OBJ_TYPE);
4694 		goto done;
4695 	}
4696 
4697 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4698 	if (err)
4699 		goto done;
4700 	blame->f = got_opentemp();
4701 	if (blame->f == NULL) {
4702 		err = got_error_from_errno("got_opentemp");
4703 		goto done;
4704 	}
4705 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4706 	    &blame->line_offsets, blame->f, blob);
4707 	if (err)
4708 		goto done;
4709 	if (blame->nlines == 0) {
4710 		s->blame_complete = 1;
4711 		goto done;
4712 	}
4713 
4714 	/* Don't include \n at EOF in the blame line count. */
4715 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4716 		blame->nlines--;
4717 
4718 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4719 	if (blame->lines == NULL) {
4720 		err = got_error_from_errno("calloc");
4721 		goto done;
4722 	}
4723 
4724 	err = got_repo_pack_fds_open(&pack_fds);
4725 	if (err)
4726 		goto done;
4727 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4728 	    pack_fds);
4729 	if (err)
4730 		goto done;
4731 
4732 	blame->pack_fds = pack_fds;
4733 	blame->cb_args.view = view;
4734 	blame->cb_args.lines = blame->lines;
4735 	blame->cb_args.nlines = blame->nlines;
4736 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4737 	if (blame->cb_args.commit_id == NULL) {
4738 		err = got_error_from_errno("got_object_id_dup");
4739 		goto done;
4740 	}
4741 	blame->cb_args.quit = &s->done;
4742 
4743 	blame->thread_args.path = s->path;
4744 	blame->thread_args.repo = thread_repo;
4745 	blame->thread_args.cb_args = &blame->cb_args;
4746 	blame->thread_args.complete = &s->blame_complete;
4747 	blame->thread_args.cancel_cb = cancel_blame_view;
4748 	blame->thread_args.cancel_arg = &s->done;
4749 	s->blame_complete = 0;
4750 
4751 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4752 		s->first_displayed_line = 1;
4753 		s->last_displayed_line = view->nlines;
4754 		s->selected_line = 1;
4755 	}
4756 	s->matched_line = 0;
4757 
4758 done:
4759 	if (commit)
4760 		got_object_commit_close(commit);
4761 	if (blob)
4762 		got_object_blob_close(blob);
4763 	free(obj_id);
4764 	if (err)
4765 		stop_blame(blame);
4766 	return err;
4767 }
4768 
4769 static const struct got_error *
4770 open_blame_view(struct tog_view *view, char *path,
4771     struct got_object_id *commit_id, struct got_repository *repo)
4772 {
4773 	const struct got_error *err = NULL;
4774 	struct tog_blame_view_state *s = &view->state.blame;
4775 
4776 	STAILQ_INIT(&s->blamed_commits);
4777 
4778 	s->path = strdup(path);
4779 	if (s->path == NULL)
4780 		return got_error_from_errno("strdup");
4781 
4782 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4783 	if (err) {
4784 		free(s->path);
4785 		return err;
4786 	}
4787 
4788 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4789 	s->first_displayed_line = 1;
4790 	s->last_displayed_line = view->nlines;
4791 	s->selected_line = 1;
4792 	s->blame_complete = 0;
4793 	s->repo = repo;
4794 	s->commit_id = commit_id;
4795 	memset(&s->blame, 0, sizeof(s->blame));
4796 
4797 	STAILQ_INIT(&s->colors);
4798 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4799 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4800 		    get_color_value("TOG_COLOR_COMMIT"));
4801 		if (err)
4802 			return err;
4803 	}
4804 
4805 	view->show = show_blame_view;
4806 	view->input = input_blame_view;
4807 	view->close = close_blame_view;
4808 	view->search_start = search_start_blame_view;
4809 	view->search_next = search_next_blame_view;
4810 
4811 	return run_blame(view);
4812 }
4813 
4814 static const struct got_error *
4815 close_blame_view(struct tog_view *view)
4816 {
4817 	const struct got_error *err = NULL;
4818 	struct tog_blame_view_state *s = &view->state.blame;
4819 
4820 	if (s->blame.thread)
4821 		err = stop_blame(&s->blame);
4822 
4823 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4824 		struct got_object_qid *blamed_commit;
4825 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4826 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4827 		got_object_qid_free(blamed_commit);
4828 	}
4829 
4830 	free(s->path);
4831 	free_colors(&s->colors);
4832 	return err;
4833 }
4834 
4835 static const struct got_error *
4836 search_start_blame_view(struct tog_view *view)
4837 {
4838 	struct tog_blame_view_state *s = &view->state.blame;
4839 
4840 	s->matched_line = 0;
4841 	return NULL;
4842 }
4843 
4844 static const struct got_error *
4845 search_next_blame_view(struct tog_view *view)
4846 {
4847 	struct tog_blame_view_state *s = &view->state.blame;
4848 	const struct got_error *err = NULL;
4849 	int lineno;
4850 	char *line = NULL;
4851 	size_t linesize = 0;
4852 	ssize_t linelen;
4853 
4854 	if (!view->searching) {
4855 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4856 		return NULL;
4857 	}
4858 
4859 	if (s->matched_line) {
4860 		if (view->searching == TOG_SEARCH_FORWARD)
4861 			lineno = s->matched_line + 1;
4862 		else
4863 			lineno = s->matched_line - 1;
4864 	} else
4865 		lineno = s->first_displayed_line - 1 + s->selected_line;
4866 
4867 	while (1) {
4868 		off_t offset;
4869 
4870 		if (lineno <= 0 || lineno > s->blame.nlines) {
4871 			if (s->matched_line == 0) {
4872 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4873 				break;
4874 			}
4875 
4876 			if (view->searching == TOG_SEARCH_FORWARD)
4877 				lineno = 1;
4878 			else
4879 				lineno = s->blame.nlines;
4880 		}
4881 
4882 		offset = s->blame.line_offsets[lineno - 1];
4883 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4884 			free(line);
4885 			return got_error_from_errno("fseeko");
4886 		}
4887 		linelen = getline(&line, &linesize, s->blame.f);
4888 		if (linelen != -1) {
4889 			char *exstr;
4890 			err = expand_tab(&exstr, line);
4891 			if (err)
4892 				break;
4893 			if (match_line(exstr, &view->regex, 1,
4894 			    &view->regmatch)) {
4895 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4896 				s->matched_line = lineno;
4897 				free(exstr);
4898 				break;
4899 			}
4900 			free(exstr);
4901 		}
4902 		if (view->searching == TOG_SEARCH_FORWARD)
4903 			lineno++;
4904 		else
4905 			lineno--;
4906 	}
4907 	free(line);
4908 
4909 	if (s->matched_line) {
4910 		s->first_displayed_line = s->matched_line;
4911 		s->selected_line = 1;
4912 	}
4913 
4914 	return err;
4915 }
4916 
4917 static const struct got_error *
4918 show_blame_view(struct tog_view *view)
4919 {
4920 	const struct got_error *err = NULL;
4921 	struct tog_blame_view_state *s = &view->state.blame;
4922 	int errcode;
4923 
4924 	if (s->blame.thread == NULL && !s->blame_complete) {
4925 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4926 		    &s->blame.thread_args);
4927 		if (errcode)
4928 			return got_error_set_errno(errcode, "pthread_create");
4929 
4930 		halfdelay(1); /* fast refresh while annotating  */
4931 	}
4932 
4933 	if (s->blame_complete)
4934 		halfdelay(10); /* disable fast refresh */
4935 
4936 	err = draw_blame(view);
4937 
4938 	view_vborder(view);
4939 	return err;
4940 }
4941 
4942 static const struct got_error *
4943 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4944 {
4945 	const struct got_error *err = NULL, *thread_err = NULL;
4946 	struct tog_view *diff_view;
4947 	struct tog_blame_view_state *s = &view->state.blame;
4948 	int begin_x = 0, nscroll = view->nlines - 2;
4949 
4950 	switch (ch) {
4951 	case '0':
4952 		view->x = 0;
4953 		break;
4954 	case '$':
4955 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4956 		break;
4957 	case KEY_RIGHT:
4958 	case 'l':
4959 		if (view->x + view->ncols / 3 < view->maxx)
4960 			view->x += 2;  /* move two columns right */
4961 		break;
4962 	case KEY_LEFT:
4963 	case 'h':
4964 		view->x -= MIN(view->x, 2);  /* move two columns back */
4965 		break;
4966 	case 'q':
4967 		s->done = 1;
4968 		break;
4969 	case 'g':
4970 	case KEY_HOME:
4971 		s->selected_line = 1;
4972 		s->first_displayed_line = 1;
4973 		break;
4974 	case 'G':
4975 	case KEY_END:
4976 		if (s->blame.nlines < view->nlines - 2) {
4977 			s->selected_line = s->blame.nlines;
4978 			s->first_displayed_line = 1;
4979 		} else {
4980 			s->selected_line = view->nlines - 2;
4981 			s->first_displayed_line = s->blame.nlines -
4982 			    (view->nlines - 3);
4983 		}
4984 		break;
4985 	case 'k':
4986 	case KEY_UP:
4987 	case CTRL('p'):
4988 		if (s->selected_line > 1)
4989 			s->selected_line--;
4990 		else if (s->selected_line == 1 &&
4991 		    s->first_displayed_line > 1)
4992 			s->first_displayed_line--;
4993 		break;
4994 	case CTRL('u'):
4995 	case 'u':
4996 		nscroll /= 2;
4997 		/* FALL THROUGH */
4998 	case KEY_PPAGE:
4999 	case CTRL('b'):
5000 		if (s->first_displayed_line == 1) {
5001 			s->selected_line = MAX(1, s->selected_line - nscroll);
5002 			break;
5003 		}
5004 		if (s->first_displayed_line > nscroll)
5005 			s->first_displayed_line -= nscroll;
5006 		else
5007 			s->first_displayed_line = 1;
5008 		break;
5009 	case 'j':
5010 	case KEY_DOWN:
5011 	case CTRL('n'):
5012 		if (s->selected_line < view->nlines - 2 &&
5013 		    s->first_displayed_line +
5014 		    s->selected_line <= s->blame.nlines)
5015 			s->selected_line++;
5016 		else if (s->last_displayed_line <
5017 		    s->blame.nlines)
5018 			s->first_displayed_line++;
5019 		break;
5020 	case 'b':
5021 	case 'p': {
5022 		struct got_object_id *id = NULL;
5023 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5024 		    s->first_displayed_line, s->selected_line);
5025 		if (id == NULL)
5026 			break;
5027 		if (ch == 'p') {
5028 			struct got_commit_object *commit, *pcommit;
5029 			struct got_object_qid *pid;
5030 			struct got_object_id *blob_id = NULL;
5031 			int obj_type;
5032 			err = got_object_open_as_commit(&commit,
5033 			    s->repo, id);
5034 			if (err)
5035 				break;
5036 			pid = STAILQ_FIRST(
5037 			    got_object_commit_get_parent_ids(commit));
5038 			if (pid == NULL) {
5039 				got_object_commit_close(commit);
5040 				break;
5041 			}
5042 			/* Check if path history ends here. */
5043 			err = got_object_open_as_commit(&pcommit,
5044 			    s->repo, &pid->id);
5045 			if (err)
5046 				break;
5047 			err = got_object_id_by_path(&blob_id, s->repo,
5048 			    pcommit, s->path);
5049 			got_object_commit_close(pcommit);
5050 			if (err) {
5051 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5052 					err = NULL;
5053 				got_object_commit_close(commit);
5054 				break;
5055 			}
5056 			err = got_object_get_type(&obj_type, s->repo,
5057 			    blob_id);
5058 			free(blob_id);
5059 			/* Can't blame non-blob type objects. */
5060 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5061 				got_object_commit_close(commit);
5062 				break;
5063 			}
5064 			err = got_object_qid_alloc(&s->blamed_commit,
5065 			    &pid->id);
5066 			got_object_commit_close(commit);
5067 		} else {
5068 			if (got_object_id_cmp(id,
5069 			    &s->blamed_commit->id) == 0)
5070 				break;
5071 			err = got_object_qid_alloc(&s->blamed_commit,
5072 			    id);
5073 		}
5074 		if (err)
5075 			break;
5076 		s->done = 1;
5077 		thread_err = stop_blame(&s->blame);
5078 		s->done = 0;
5079 		if (thread_err)
5080 			break;
5081 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5082 		    s->blamed_commit, entry);
5083 		err = run_blame(view);
5084 		if (err)
5085 			break;
5086 		break;
5087 	}
5088 	case 'B': {
5089 		struct got_object_qid *first;
5090 		first = STAILQ_FIRST(&s->blamed_commits);
5091 		if (!got_object_id_cmp(&first->id, s->commit_id))
5092 			break;
5093 		s->done = 1;
5094 		thread_err = stop_blame(&s->blame);
5095 		s->done = 0;
5096 		if (thread_err)
5097 			break;
5098 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5099 		got_object_qid_free(s->blamed_commit);
5100 		s->blamed_commit =
5101 		    STAILQ_FIRST(&s->blamed_commits);
5102 		err = run_blame(view);
5103 		if (err)
5104 			break;
5105 		break;
5106 	}
5107 	case KEY_ENTER:
5108 	case '\r': {
5109 		struct got_object_id *id = NULL;
5110 		struct got_object_qid *pid;
5111 		struct got_commit_object *commit = NULL;
5112 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5113 		    s->first_displayed_line, s->selected_line);
5114 		if (id == NULL)
5115 			break;
5116 		err = got_object_open_as_commit(&commit, s->repo, id);
5117 		if (err)
5118 			break;
5119 		pid = STAILQ_FIRST(
5120 		    got_object_commit_get_parent_ids(commit));
5121 		if (view_is_parent_view(view))
5122 		    begin_x = view_split_begin_x(view->begin_x);
5123 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5124 		if (diff_view == NULL) {
5125 			got_object_commit_close(commit);
5126 			err = got_error_from_errno("view_open");
5127 			break;
5128 		}
5129 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5130 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5131 		got_object_commit_close(commit);
5132 		if (err) {
5133 			view_close(diff_view);
5134 			break;
5135 		}
5136 		view->focussed = 0;
5137 		diff_view->focussed = 1;
5138 		if (view_is_parent_view(view)) {
5139 			err = view_close_child(view);
5140 			if (err)
5141 				break;
5142 			err = view_set_child(view, diff_view);
5143 			if (err)
5144 				break;
5145 			view->focus_child = 1;
5146 		} else
5147 			*new_view = diff_view;
5148 		if (err)
5149 			break;
5150 		break;
5151 	}
5152 	case CTRL('d'):
5153 	case 'd':
5154 		nscroll /= 2;
5155 		/* FALL THROUGH */
5156 	case KEY_NPAGE:
5157 	case CTRL('f'):
5158 	case ' ':
5159 		if (s->last_displayed_line >= s->blame.nlines &&
5160 		    s->selected_line >= MIN(s->blame.nlines,
5161 		    view->nlines - 2)) {
5162 			break;
5163 		}
5164 		if (s->last_displayed_line >= s->blame.nlines &&
5165 		    s->selected_line < view->nlines - 2) {
5166 			s->selected_line +=
5167 			    MIN(nscroll, s->last_displayed_line -
5168 			    s->first_displayed_line - s->selected_line + 1);
5169 		}
5170 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5171 			s->first_displayed_line += nscroll;
5172 		else
5173 			s->first_displayed_line =
5174 			    s->blame.nlines - (view->nlines - 3);
5175 		break;
5176 	case KEY_RESIZE:
5177 		if (s->selected_line > view->nlines - 2) {
5178 			s->selected_line = MIN(s->blame.nlines,
5179 			    view->nlines - 2);
5180 		}
5181 		break;
5182 	default:
5183 		break;
5184 	}
5185 	return thread_err ? thread_err : err;
5186 }
5187 
5188 static const struct got_error *
5189 cmd_blame(int argc, char *argv[])
5190 {
5191 	const struct got_error *error;
5192 	struct got_repository *repo = NULL;
5193 	struct got_worktree *worktree = NULL;
5194 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5195 	char *link_target = NULL;
5196 	struct got_object_id *commit_id = NULL;
5197 	struct got_commit_object *commit = NULL;
5198 	char *commit_id_str = NULL;
5199 	int ch;
5200 	struct tog_view *view;
5201 	int *pack_fds = NULL;
5202 
5203 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5204 		switch (ch) {
5205 		case 'c':
5206 			commit_id_str = optarg;
5207 			break;
5208 		case 'r':
5209 			repo_path = realpath(optarg, NULL);
5210 			if (repo_path == NULL)
5211 				return got_error_from_errno2("realpath",
5212 				    optarg);
5213 			break;
5214 		default:
5215 			usage_blame();
5216 			/* NOTREACHED */
5217 		}
5218 	}
5219 
5220 	argc -= optind;
5221 	argv += optind;
5222 
5223 	if (argc != 1)
5224 		usage_blame();
5225 
5226 	error = got_repo_pack_fds_open(&pack_fds);
5227 	if (error != NULL)
5228 		goto done;
5229 
5230 	if (repo_path == NULL) {
5231 		cwd = getcwd(NULL, 0);
5232 		if (cwd == NULL)
5233 			return got_error_from_errno("getcwd");
5234 		error = got_worktree_open(&worktree, cwd);
5235 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5236 			goto done;
5237 		if (worktree)
5238 			repo_path =
5239 			    strdup(got_worktree_get_repo_path(worktree));
5240 		else
5241 			repo_path = strdup(cwd);
5242 		if (repo_path == NULL) {
5243 			error = got_error_from_errno("strdup");
5244 			goto done;
5245 		}
5246 	}
5247 
5248 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5249 	if (error != NULL)
5250 		goto done;
5251 
5252 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5253 	    worktree);
5254 	if (error)
5255 		goto done;
5256 
5257 	init_curses();
5258 
5259 	error = apply_unveil(got_repo_get_path(repo), NULL);
5260 	if (error)
5261 		goto done;
5262 
5263 	error = tog_load_refs(repo, 0);
5264 	if (error)
5265 		goto done;
5266 
5267 	if (commit_id_str == NULL) {
5268 		struct got_reference *head_ref;
5269 		error = got_ref_open(&head_ref, repo, worktree ?
5270 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5271 		if (error != NULL)
5272 			goto done;
5273 		error = got_ref_resolve(&commit_id, repo, head_ref);
5274 		got_ref_close(head_ref);
5275 	} else {
5276 		error = got_repo_match_object_id(&commit_id, NULL,
5277 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5278 	}
5279 	if (error != NULL)
5280 		goto done;
5281 
5282 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5283 	if (view == NULL) {
5284 		error = got_error_from_errno("view_open");
5285 		goto done;
5286 	}
5287 
5288 	error = got_object_open_as_commit(&commit, repo, commit_id);
5289 	if (error)
5290 		goto done;
5291 
5292 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5293 	    commit, repo);
5294 	if (error)
5295 		goto done;
5296 
5297 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5298 	    commit_id, repo);
5299 	if (error)
5300 		goto done;
5301 	if (worktree) {
5302 		/* Release work tree lock. */
5303 		got_worktree_close(worktree);
5304 		worktree = NULL;
5305 	}
5306 	error = view_loop(view);
5307 done:
5308 	free(repo_path);
5309 	free(in_repo_path);
5310 	free(link_target);
5311 	free(cwd);
5312 	free(commit_id);
5313 	if (commit)
5314 		got_object_commit_close(commit);
5315 	if (worktree)
5316 		got_worktree_close(worktree);
5317 	if (repo) {
5318 		const struct got_error *close_err = got_repo_close(repo);
5319 		if (error == NULL)
5320 			error = close_err;
5321 	}
5322 	if (pack_fds) {
5323 		const struct got_error *pack_err =
5324 		    got_repo_pack_fds_close(pack_fds);
5325 		if (error == NULL)
5326 			error = pack_err;
5327 	}
5328 	tog_free_refs();
5329 	return error;
5330 }
5331 
5332 static const struct got_error *
5333 draw_tree_entries(struct tog_view *view, const char *parent_path)
5334 {
5335 	struct tog_tree_view_state *s = &view->state.tree;
5336 	const struct got_error *err = NULL;
5337 	struct got_tree_entry *te;
5338 	wchar_t *wline;
5339 	struct tog_color *tc;
5340 	int width, n, i, nentries;
5341 	int limit = view->nlines;
5342 
5343 	s->ndisplayed = 0;
5344 
5345 	werase(view->window);
5346 
5347 	if (limit == 0)
5348 		return NULL;
5349 
5350 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5351 	    0, 0);
5352 	if (err)
5353 		return err;
5354 	if (view_needs_focus_indication(view))
5355 		wstandout(view->window);
5356 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5357 	if (tc)
5358 		wattr_on(view->window,
5359 		    COLOR_PAIR(tc->colorpair), NULL);
5360 	waddwstr(view->window, wline);
5361 	if (tc)
5362 		wattr_off(view->window,
5363 		    COLOR_PAIR(tc->colorpair), NULL);
5364 	if (view_needs_focus_indication(view))
5365 		wstandend(view->window);
5366 	free(wline);
5367 	wline = NULL;
5368 	if (width < view->ncols - 1)
5369 		waddch(view->window, '\n');
5370 	if (--limit <= 0)
5371 		return NULL;
5372 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5373 	    0, 0);
5374 	if (err)
5375 		return err;
5376 	waddwstr(view->window, wline);
5377 	free(wline);
5378 	wline = NULL;
5379 	if (width < view->ncols - 1)
5380 		waddch(view->window, '\n');
5381 	if (--limit <= 0)
5382 		return NULL;
5383 	waddch(view->window, '\n');
5384 	if (--limit <= 0)
5385 		return NULL;
5386 
5387 	if (s->first_displayed_entry == NULL) {
5388 		te = got_object_tree_get_first_entry(s->tree);
5389 		if (s->selected == 0) {
5390 			if (view->focussed)
5391 				wstandout(view->window);
5392 			s->selected_entry = NULL;
5393 		}
5394 		waddstr(view->window, "  ..\n");	/* parent directory */
5395 		if (s->selected == 0 && view->focussed)
5396 			wstandend(view->window);
5397 		s->ndisplayed++;
5398 		if (--limit <= 0)
5399 			return NULL;
5400 		n = 1;
5401 	} else {
5402 		n = 0;
5403 		te = s->first_displayed_entry;
5404 	}
5405 
5406 	nentries = got_object_tree_get_nentries(s->tree);
5407 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5408 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5409 		const char *modestr = "";
5410 		mode_t mode;
5411 
5412 		te = got_object_tree_get_entry(s->tree, i);
5413 		mode = got_tree_entry_get_mode(te);
5414 
5415 		if (s->show_ids) {
5416 			err = got_object_id_str(&id_str,
5417 			    got_tree_entry_get_id(te));
5418 			if (err)
5419 				return got_error_from_errno(
5420 				    "got_object_id_str");
5421 		}
5422 		if (got_object_tree_entry_is_submodule(te))
5423 			modestr = "$";
5424 		else if (S_ISLNK(mode)) {
5425 			int i;
5426 
5427 			err = got_tree_entry_get_symlink_target(&link_target,
5428 			    te, s->repo);
5429 			if (err) {
5430 				free(id_str);
5431 				return err;
5432 			}
5433 			for (i = 0; i < strlen(link_target); i++) {
5434 				if (!isprint((unsigned char)link_target[i]))
5435 					link_target[i] = '?';
5436 			}
5437 			modestr = "@";
5438 		}
5439 		else if (S_ISDIR(mode))
5440 			modestr = "/";
5441 		else if (mode & S_IXUSR)
5442 			modestr = "*";
5443 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5444 		    got_tree_entry_get_name(te), modestr,
5445 		    link_target ? " -> ": "",
5446 		    link_target ? link_target : "") == -1) {
5447 			free(id_str);
5448 			free(link_target);
5449 			return got_error_from_errno("asprintf");
5450 		}
5451 		free(id_str);
5452 		free(link_target);
5453 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5454 		    0, 0);
5455 		if (err) {
5456 			free(line);
5457 			break;
5458 		}
5459 		if (n == s->selected) {
5460 			if (view->focussed)
5461 				wstandout(view->window);
5462 			s->selected_entry = te;
5463 		}
5464 		tc = match_color(&s->colors, line);
5465 		if (tc)
5466 			wattr_on(view->window,
5467 			    COLOR_PAIR(tc->colorpair), NULL);
5468 		waddwstr(view->window, wline);
5469 		if (tc)
5470 			wattr_off(view->window,
5471 			    COLOR_PAIR(tc->colorpair), NULL);
5472 		if (width < view->ncols - 1)
5473 			waddch(view->window, '\n');
5474 		if (n == s->selected && view->focussed)
5475 			wstandend(view->window);
5476 		free(line);
5477 		free(wline);
5478 		wline = NULL;
5479 		n++;
5480 		s->ndisplayed++;
5481 		s->last_displayed_entry = te;
5482 		if (--limit <= 0)
5483 			break;
5484 	}
5485 
5486 	return err;
5487 }
5488 
5489 static void
5490 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5491 {
5492 	struct got_tree_entry *te;
5493 	int isroot = s->tree == s->root;
5494 	int i = 0;
5495 
5496 	if (s->first_displayed_entry == NULL)
5497 		return;
5498 
5499 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5500 	while (i++ < maxscroll) {
5501 		if (te == NULL) {
5502 			if (!isroot)
5503 				s->first_displayed_entry = NULL;
5504 			break;
5505 		}
5506 		s->first_displayed_entry = te;
5507 		te = got_tree_entry_get_prev(s->tree, te);
5508 	}
5509 }
5510 
5511 static void
5512 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5513 {
5514 	struct got_tree_entry *next, *last;
5515 	int n = 0;
5516 
5517 	if (s->first_displayed_entry)
5518 		next = got_tree_entry_get_next(s->tree,
5519 		    s->first_displayed_entry);
5520 	else
5521 		next = got_object_tree_get_first_entry(s->tree);
5522 
5523 	last = s->last_displayed_entry;
5524 	while (next && last && n++ < maxscroll) {
5525 		last = got_tree_entry_get_next(s->tree, last);
5526 		if (last) {
5527 			s->first_displayed_entry = next;
5528 			next = got_tree_entry_get_next(s->tree, next);
5529 		}
5530 	}
5531 }
5532 
5533 static const struct got_error *
5534 tree_entry_path(char **path, struct tog_parent_trees *parents,
5535     struct got_tree_entry *te)
5536 {
5537 	const struct got_error *err = NULL;
5538 	struct tog_parent_tree *pt;
5539 	size_t len = 2; /* for leading slash and NUL */
5540 
5541 	TAILQ_FOREACH(pt, parents, entry)
5542 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5543 		    + 1 /* slash */;
5544 	if (te)
5545 		len += strlen(got_tree_entry_get_name(te));
5546 
5547 	*path = calloc(1, len);
5548 	if (path == NULL)
5549 		return got_error_from_errno("calloc");
5550 
5551 	(*path)[0] = '/';
5552 	pt = TAILQ_LAST(parents, tog_parent_trees);
5553 	while (pt) {
5554 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5555 		if (strlcat(*path, name, len) >= len) {
5556 			err = got_error(GOT_ERR_NO_SPACE);
5557 			goto done;
5558 		}
5559 		if (strlcat(*path, "/", len) >= len) {
5560 			err = got_error(GOT_ERR_NO_SPACE);
5561 			goto done;
5562 		}
5563 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5564 	}
5565 	if (te) {
5566 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5567 			err = got_error(GOT_ERR_NO_SPACE);
5568 			goto done;
5569 		}
5570 	}
5571 done:
5572 	if (err) {
5573 		free(*path);
5574 		*path = NULL;
5575 	}
5576 	return err;
5577 }
5578 
5579 static const struct got_error *
5580 blame_tree_entry(struct tog_view **new_view, int begin_x,
5581     struct got_tree_entry *te, struct tog_parent_trees *parents,
5582     struct got_object_id *commit_id, struct got_repository *repo)
5583 {
5584 	const struct got_error *err = NULL;
5585 	char *path;
5586 	struct tog_view *blame_view;
5587 
5588 	*new_view = NULL;
5589 
5590 	err = tree_entry_path(&path, parents, te);
5591 	if (err)
5592 		return err;
5593 
5594 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5595 	if (blame_view == NULL) {
5596 		err = got_error_from_errno("view_open");
5597 		goto done;
5598 	}
5599 
5600 	err = open_blame_view(blame_view, path, commit_id, repo);
5601 	if (err) {
5602 		if (err->code == GOT_ERR_CANCELLED)
5603 			err = NULL;
5604 		view_close(blame_view);
5605 	} else
5606 		*new_view = blame_view;
5607 done:
5608 	free(path);
5609 	return err;
5610 }
5611 
5612 static const struct got_error *
5613 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5614     struct tog_tree_view_state *s)
5615 {
5616 	struct tog_view *log_view;
5617 	const struct got_error *err = NULL;
5618 	char *path;
5619 
5620 	*new_view = NULL;
5621 
5622 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5623 	if (log_view == NULL)
5624 		return got_error_from_errno("view_open");
5625 
5626 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5627 	if (err)
5628 		return err;
5629 
5630 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5631 	    path, 0);
5632 	if (err)
5633 		view_close(log_view);
5634 	else
5635 		*new_view = log_view;
5636 	free(path);
5637 	return err;
5638 }
5639 
5640 static const struct got_error *
5641 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5642     const char *head_ref_name, struct got_repository *repo)
5643 {
5644 	const struct got_error *err = NULL;
5645 	char *commit_id_str = NULL;
5646 	struct tog_tree_view_state *s = &view->state.tree;
5647 	struct got_commit_object *commit = NULL;
5648 
5649 	TAILQ_INIT(&s->parents);
5650 	STAILQ_INIT(&s->colors);
5651 
5652 	s->commit_id = got_object_id_dup(commit_id);
5653 	if (s->commit_id == NULL)
5654 		return got_error_from_errno("got_object_id_dup");
5655 
5656 	err = got_object_open_as_commit(&commit, repo, commit_id);
5657 	if (err)
5658 		goto done;
5659 
5660 	/*
5661 	 * The root is opened here and will be closed when the view is closed.
5662 	 * Any visited subtrees and their path-wise parents are opened and
5663 	 * closed on demand.
5664 	 */
5665 	err = got_object_open_as_tree(&s->root, repo,
5666 	    got_object_commit_get_tree_id(commit));
5667 	if (err)
5668 		goto done;
5669 	s->tree = s->root;
5670 
5671 	err = got_object_id_str(&commit_id_str, commit_id);
5672 	if (err != NULL)
5673 		goto done;
5674 
5675 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5676 		err = got_error_from_errno("asprintf");
5677 		goto done;
5678 	}
5679 
5680 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5681 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5682 	if (head_ref_name) {
5683 		s->head_ref_name = strdup(head_ref_name);
5684 		if (s->head_ref_name == NULL) {
5685 			err = got_error_from_errno("strdup");
5686 			goto done;
5687 		}
5688 	}
5689 	s->repo = repo;
5690 
5691 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5692 		err = add_color(&s->colors, "\\$$",
5693 		    TOG_COLOR_TREE_SUBMODULE,
5694 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5695 		if (err)
5696 			goto done;
5697 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5698 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5699 		if (err)
5700 			goto done;
5701 		err = add_color(&s->colors, "/$",
5702 		    TOG_COLOR_TREE_DIRECTORY,
5703 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5704 		if (err)
5705 			goto done;
5706 
5707 		err = add_color(&s->colors, "\\*$",
5708 		    TOG_COLOR_TREE_EXECUTABLE,
5709 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5710 		if (err)
5711 			goto done;
5712 
5713 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5714 		    get_color_value("TOG_COLOR_COMMIT"));
5715 		if (err)
5716 			goto done;
5717 	}
5718 
5719 	view->show = show_tree_view;
5720 	view->input = input_tree_view;
5721 	view->close = close_tree_view;
5722 	view->search_start = search_start_tree_view;
5723 	view->search_next = search_next_tree_view;
5724 done:
5725 	free(commit_id_str);
5726 	if (commit)
5727 		got_object_commit_close(commit);
5728 	if (err)
5729 		close_tree_view(view);
5730 	return err;
5731 }
5732 
5733 static const struct got_error *
5734 close_tree_view(struct tog_view *view)
5735 {
5736 	struct tog_tree_view_state *s = &view->state.tree;
5737 
5738 	free_colors(&s->colors);
5739 	free(s->tree_label);
5740 	s->tree_label = NULL;
5741 	free(s->commit_id);
5742 	s->commit_id = NULL;
5743 	free(s->head_ref_name);
5744 	s->head_ref_name = NULL;
5745 	while (!TAILQ_EMPTY(&s->parents)) {
5746 		struct tog_parent_tree *parent;
5747 		parent = TAILQ_FIRST(&s->parents);
5748 		TAILQ_REMOVE(&s->parents, parent, entry);
5749 		if (parent->tree != s->root)
5750 			got_object_tree_close(parent->tree);
5751 		free(parent);
5752 
5753 	}
5754 	if (s->tree != NULL && s->tree != s->root)
5755 		got_object_tree_close(s->tree);
5756 	if (s->root)
5757 		got_object_tree_close(s->root);
5758 	return NULL;
5759 }
5760 
5761 static const struct got_error *
5762 search_start_tree_view(struct tog_view *view)
5763 {
5764 	struct tog_tree_view_state *s = &view->state.tree;
5765 
5766 	s->matched_entry = NULL;
5767 	return NULL;
5768 }
5769 
5770 static int
5771 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5772 {
5773 	regmatch_t regmatch;
5774 
5775 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5776 	    0) == 0;
5777 }
5778 
5779 static const struct got_error *
5780 search_next_tree_view(struct tog_view *view)
5781 {
5782 	struct tog_tree_view_state *s = &view->state.tree;
5783 	struct got_tree_entry *te = NULL;
5784 
5785 	if (!view->searching) {
5786 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5787 		return NULL;
5788 	}
5789 
5790 	if (s->matched_entry) {
5791 		if (view->searching == TOG_SEARCH_FORWARD) {
5792 			if (s->selected_entry)
5793 				te = got_tree_entry_get_next(s->tree,
5794 				    s->selected_entry);
5795 			else
5796 				te = got_object_tree_get_first_entry(s->tree);
5797 		} else {
5798 			if (s->selected_entry == NULL)
5799 				te = got_object_tree_get_last_entry(s->tree);
5800 			else
5801 				te = got_tree_entry_get_prev(s->tree,
5802 				    s->selected_entry);
5803 		}
5804 	} else {
5805 		if (s->selected_entry)
5806 			te = s->selected_entry;
5807 		else if (view->searching == TOG_SEARCH_FORWARD)
5808 			te = got_object_tree_get_first_entry(s->tree);
5809 		else
5810 			te = got_object_tree_get_last_entry(s->tree);
5811 	}
5812 
5813 	while (1) {
5814 		if (te == NULL) {
5815 			if (s->matched_entry == NULL) {
5816 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5817 				return NULL;
5818 			}
5819 			if (view->searching == TOG_SEARCH_FORWARD)
5820 				te = got_object_tree_get_first_entry(s->tree);
5821 			else
5822 				te = got_object_tree_get_last_entry(s->tree);
5823 		}
5824 
5825 		if (match_tree_entry(te, &view->regex)) {
5826 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5827 			s->matched_entry = te;
5828 			break;
5829 		}
5830 
5831 		if (view->searching == TOG_SEARCH_FORWARD)
5832 			te = got_tree_entry_get_next(s->tree, te);
5833 		else
5834 			te = got_tree_entry_get_prev(s->tree, te);
5835 	}
5836 
5837 	if (s->matched_entry) {
5838 		s->first_displayed_entry = s->matched_entry;
5839 		s->selected = 0;
5840 	}
5841 
5842 	return NULL;
5843 }
5844 
5845 static const struct got_error *
5846 show_tree_view(struct tog_view *view)
5847 {
5848 	const struct got_error *err = NULL;
5849 	struct tog_tree_view_state *s = &view->state.tree;
5850 	char *parent_path;
5851 
5852 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5853 	if (err)
5854 		return err;
5855 
5856 	err = draw_tree_entries(view, parent_path);
5857 	free(parent_path);
5858 
5859 	view_vborder(view);
5860 	return err;
5861 }
5862 
5863 static const struct got_error *
5864 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5865 {
5866 	const struct got_error *err = NULL;
5867 	struct tog_tree_view_state *s = &view->state.tree;
5868 	struct tog_view *log_view, *ref_view;
5869 	struct got_tree_entry *te;
5870 	int begin_x = 0, n, nscroll = view->nlines - 3;
5871 
5872 	switch (ch) {
5873 	case 'i':
5874 		s->show_ids = !s->show_ids;
5875 		break;
5876 	case 'l':
5877 		if (!s->selected_entry)
5878 			break;
5879 		if (view_is_parent_view(view))
5880 			begin_x = view_split_begin_x(view->begin_x);
5881 		err = log_selected_tree_entry(&log_view, begin_x, s);
5882 		view->focussed = 0;
5883 		log_view->focussed = 1;
5884 		if (view_is_parent_view(view)) {
5885 			err = view_close_child(view);
5886 			if (err)
5887 				return err;
5888 			err = view_set_child(view, log_view);
5889 			if (err)
5890 				return err;
5891 			view->focus_child = 1;
5892 		} else
5893 			*new_view = log_view;
5894 		break;
5895 	case 'r':
5896 		if (view_is_parent_view(view))
5897 			begin_x = view_split_begin_x(view->begin_x);
5898 		ref_view = view_open(view->nlines, view->ncols,
5899 		    view->begin_y, begin_x, TOG_VIEW_REF);
5900 		if (ref_view == NULL)
5901 			return got_error_from_errno("view_open");
5902 		err = open_ref_view(ref_view, s->repo);
5903 		if (err) {
5904 			view_close(ref_view);
5905 			return err;
5906 		}
5907 		view->focussed = 0;
5908 		ref_view->focussed = 1;
5909 		if (view_is_parent_view(view)) {
5910 			err = view_close_child(view);
5911 			if (err)
5912 				return err;
5913 			err = view_set_child(view, ref_view);
5914 			if (err)
5915 				return err;
5916 			view->focus_child = 1;
5917 		} else
5918 			*new_view = ref_view;
5919 		break;
5920 	case 'g':
5921 	case KEY_HOME:
5922 		s->selected = 0;
5923 		if (s->tree == s->root)
5924 			s->first_displayed_entry =
5925 			    got_object_tree_get_first_entry(s->tree);
5926 		else
5927 			s->first_displayed_entry = NULL;
5928 		break;
5929 	case 'G':
5930 	case KEY_END:
5931 		s->selected = 0;
5932 		te = got_object_tree_get_last_entry(s->tree);
5933 		for (n = 0; n < view->nlines - 3; n++) {
5934 			if (te == NULL) {
5935 				if(s->tree != s->root) {
5936 					s->first_displayed_entry = NULL;
5937 					n++;
5938 				}
5939 				break;
5940 			}
5941 			s->first_displayed_entry = te;
5942 			te = got_tree_entry_get_prev(s->tree, te);
5943 		}
5944 		if (n > 0)
5945 			s->selected = n - 1;
5946 		break;
5947 	case 'k':
5948 	case KEY_UP:
5949 	case CTRL('p'):
5950 		if (s->selected > 0) {
5951 			s->selected--;
5952 			break;
5953 		}
5954 		tree_scroll_up(s, 1);
5955 		break;
5956 	case CTRL('u'):
5957 	case 'u':
5958 		nscroll /= 2;
5959 		/* FALL THROUGH */
5960 	case KEY_PPAGE:
5961 	case CTRL('b'):
5962 		if (s->tree == s->root) {
5963 			if (got_object_tree_get_first_entry(s->tree) ==
5964 			    s->first_displayed_entry)
5965 				s->selected -= MIN(s->selected, nscroll);
5966 		} else {
5967 			if (s->first_displayed_entry == NULL)
5968 				s->selected -= MIN(s->selected, nscroll);
5969 		}
5970 		tree_scroll_up(s, MAX(0, nscroll));
5971 		break;
5972 	case 'j':
5973 	case KEY_DOWN:
5974 	case CTRL('n'):
5975 		if (s->selected < s->ndisplayed - 1) {
5976 			s->selected++;
5977 			break;
5978 		}
5979 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5980 		    == NULL)
5981 			/* can't scroll any further */
5982 			break;
5983 		tree_scroll_down(s, 1);
5984 		break;
5985 	case CTRL('d'):
5986 	case 'd':
5987 		nscroll /= 2;
5988 		/* FALL THROUGH */
5989 	case KEY_NPAGE:
5990 	case CTRL('f'):
5991 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5992 		    == NULL) {
5993 			/* can't scroll any further; move cursor down */
5994 			if (s->selected < s->ndisplayed - 1)
5995 				s->selected += MIN(nscroll,
5996 				    s->ndisplayed - s->selected - 1);
5997 			break;
5998 		}
5999 		tree_scroll_down(s, nscroll);
6000 		break;
6001 	case KEY_ENTER:
6002 	case '\r':
6003 	case KEY_BACKSPACE:
6004 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
6005 			struct tog_parent_tree *parent;
6006 			/* user selected '..' */
6007 			if (s->tree == s->root)
6008 				break;
6009 			parent = TAILQ_FIRST(&s->parents);
6010 			TAILQ_REMOVE(&s->parents, parent,
6011 			    entry);
6012 			got_object_tree_close(s->tree);
6013 			s->tree = parent->tree;
6014 			s->first_displayed_entry =
6015 			    parent->first_displayed_entry;
6016 			s->selected_entry =
6017 			    parent->selected_entry;
6018 			s->selected = parent->selected;
6019 			free(parent);
6020 		} else if (S_ISDIR(got_tree_entry_get_mode(
6021 		    s->selected_entry))) {
6022 			struct got_tree_object *subtree;
6023 			err = got_object_open_as_tree(&subtree, s->repo,
6024 			    got_tree_entry_get_id(s->selected_entry));
6025 			if (err)
6026 				break;
6027 			err = tree_view_visit_subtree(s, subtree);
6028 			if (err) {
6029 				got_object_tree_close(subtree);
6030 				break;
6031 			}
6032 		} else if (S_ISREG(got_tree_entry_get_mode(
6033 		    s->selected_entry))) {
6034 			struct tog_view *blame_view;
6035 			int begin_x = view_is_parent_view(view) ?
6036 			    view_split_begin_x(view->begin_x) : 0;
6037 
6038 			err = blame_tree_entry(&blame_view, begin_x,
6039 			    s->selected_entry, &s->parents,
6040 			    s->commit_id, s->repo);
6041 			if (err)
6042 				break;
6043 			view->focussed = 0;
6044 			blame_view->focussed = 1;
6045 			if (view_is_parent_view(view)) {
6046 				err = view_close_child(view);
6047 				if (err)
6048 					return err;
6049 				err = view_set_child(view, blame_view);
6050 				if (err)
6051 					return err;
6052 				view->focus_child = 1;
6053 			} else
6054 				*new_view = blame_view;
6055 		}
6056 		break;
6057 	case KEY_RESIZE:
6058 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6059 			s->selected = view->nlines - 4;
6060 		break;
6061 	default:
6062 		break;
6063 	}
6064 
6065 	return err;
6066 }
6067 
6068 __dead static void
6069 usage_tree(void)
6070 {
6071 	endwin();
6072 	fprintf(stderr,
6073 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6074 	    getprogname());
6075 	exit(1);
6076 }
6077 
6078 static const struct got_error *
6079 cmd_tree(int argc, char *argv[])
6080 {
6081 	const struct got_error *error;
6082 	struct got_repository *repo = NULL;
6083 	struct got_worktree *worktree = NULL;
6084 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6085 	struct got_object_id *commit_id = NULL;
6086 	struct got_commit_object *commit = NULL;
6087 	const char *commit_id_arg = NULL;
6088 	char *label = NULL;
6089 	struct got_reference *ref = NULL;
6090 	const char *head_ref_name = NULL;
6091 	int ch;
6092 	struct tog_view *view;
6093 	int *pack_fds = NULL;
6094 
6095 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6096 		switch (ch) {
6097 		case 'c':
6098 			commit_id_arg = optarg;
6099 			break;
6100 		case 'r':
6101 			repo_path = realpath(optarg, NULL);
6102 			if (repo_path == NULL)
6103 				return got_error_from_errno2("realpath",
6104 				    optarg);
6105 			break;
6106 		default:
6107 			usage_tree();
6108 			/* NOTREACHED */
6109 		}
6110 	}
6111 
6112 	argc -= optind;
6113 	argv += optind;
6114 
6115 	if (argc > 1)
6116 		usage_tree();
6117 
6118 	error = got_repo_pack_fds_open(&pack_fds);
6119 	if (error != NULL)
6120 		goto done;
6121 
6122 	if (repo_path == NULL) {
6123 		cwd = getcwd(NULL, 0);
6124 		if (cwd == NULL)
6125 			return got_error_from_errno("getcwd");
6126 		error = got_worktree_open(&worktree, cwd);
6127 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6128 			goto done;
6129 		if (worktree)
6130 			repo_path =
6131 			    strdup(got_worktree_get_repo_path(worktree));
6132 		else
6133 			repo_path = strdup(cwd);
6134 		if (repo_path == NULL) {
6135 			error = got_error_from_errno("strdup");
6136 			goto done;
6137 		}
6138 	}
6139 
6140 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6141 	if (error != NULL)
6142 		goto done;
6143 
6144 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6145 	    repo, worktree);
6146 	if (error)
6147 		goto done;
6148 
6149 	init_curses();
6150 
6151 	error = apply_unveil(got_repo_get_path(repo), NULL);
6152 	if (error)
6153 		goto done;
6154 
6155 	error = tog_load_refs(repo, 0);
6156 	if (error)
6157 		goto done;
6158 
6159 	if (commit_id_arg == NULL) {
6160 		error = got_repo_match_object_id(&commit_id, &label,
6161 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6162 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6163 		if (error)
6164 			goto done;
6165 		head_ref_name = label;
6166 	} else {
6167 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6168 		if (error == NULL)
6169 			head_ref_name = got_ref_get_name(ref);
6170 		else if (error->code != GOT_ERR_NOT_REF)
6171 			goto done;
6172 		error = got_repo_match_object_id(&commit_id, NULL,
6173 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6174 		if (error)
6175 			goto done;
6176 	}
6177 
6178 	error = got_object_open_as_commit(&commit, repo, commit_id);
6179 	if (error)
6180 		goto done;
6181 
6182 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6183 	if (view == NULL) {
6184 		error = got_error_from_errno("view_open");
6185 		goto done;
6186 	}
6187 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6188 	if (error)
6189 		goto done;
6190 	if (!got_path_is_root_dir(in_repo_path)) {
6191 		error = tree_view_walk_path(&view->state.tree, commit,
6192 		    in_repo_path);
6193 		if (error)
6194 			goto done;
6195 	}
6196 
6197 	if (worktree) {
6198 		/* Release work tree lock. */
6199 		got_worktree_close(worktree);
6200 		worktree = NULL;
6201 	}
6202 	error = view_loop(view);
6203 done:
6204 	free(repo_path);
6205 	free(cwd);
6206 	free(commit_id);
6207 	free(label);
6208 	if (ref)
6209 		got_ref_close(ref);
6210 	if (repo) {
6211 		const struct got_error *close_err = got_repo_close(repo);
6212 		if (error == NULL)
6213 			error = close_err;
6214 	}
6215 	if (pack_fds) {
6216 		const struct got_error *pack_err =
6217 		    got_repo_pack_fds_close(pack_fds);
6218 		if (error == NULL)
6219 			error = pack_err;
6220 	}
6221 	tog_free_refs();
6222 	return error;
6223 }
6224 
6225 static const struct got_error *
6226 ref_view_load_refs(struct tog_ref_view_state *s)
6227 {
6228 	struct got_reflist_entry *sre;
6229 	struct tog_reflist_entry *re;
6230 
6231 	s->nrefs = 0;
6232 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6233 		if (strncmp(got_ref_get_name(sre->ref),
6234 		    "refs/got/", 9) == 0 &&
6235 		    strncmp(got_ref_get_name(sre->ref),
6236 		    "refs/got/backup/", 16) != 0)
6237 			continue;
6238 
6239 		re = malloc(sizeof(*re));
6240 		if (re == NULL)
6241 			return got_error_from_errno("malloc");
6242 
6243 		re->ref = got_ref_dup(sre->ref);
6244 		if (re->ref == NULL)
6245 			return got_error_from_errno("got_ref_dup");
6246 		re->idx = s->nrefs++;
6247 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6248 	}
6249 
6250 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6251 	return NULL;
6252 }
6253 
6254 void
6255 ref_view_free_refs(struct tog_ref_view_state *s)
6256 {
6257 	struct tog_reflist_entry *re;
6258 
6259 	while (!TAILQ_EMPTY(&s->refs)) {
6260 		re = TAILQ_FIRST(&s->refs);
6261 		TAILQ_REMOVE(&s->refs, re, entry);
6262 		got_ref_close(re->ref);
6263 		free(re);
6264 	}
6265 }
6266 
6267 static const struct got_error *
6268 open_ref_view(struct tog_view *view, struct got_repository *repo)
6269 {
6270 	const struct got_error *err = NULL;
6271 	struct tog_ref_view_state *s = &view->state.ref;
6272 
6273 	s->selected_entry = 0;
6274 	s->repo = repo;
6275 
6276 	TAILQ_INIT(&s->refs);
6277 	STAILQ_INIT(&s->colors);
6278 
6279 	err = ref_view_load_refs(s);
6280 	if (err)
6281 		return err;
6282 
6283 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6284 		err = add_color(&s->colors, "^refs/heads/",
6285 		    TOG_COLOR_REFS_HEADS,
6286 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6287 		if (err)
6288 			goto done;
6289 
6290 		err = add_color(&s->colors, "^refs/tags/",
6291 		    TOG_COLOR_REFS_TAGS,
6292 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6293 		if (err)
6294 			goto done;
6295 
6296 		err = add_color(&s->colors, "^refs/remotes/",
6297 		    TOG_COLOR_REFS_REMOTES,
6298 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6299 		if (err)
6300 			goto done;
6301 
6302 		err = add_color(&s->colors, "^refs/got/backup/",
6303 		    TOG_COLOR_REFS_BACKUP,
6304 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6305 		if (err)
6306 			goto done;
6307 	}
6308 
6309 	view->show = show_ref_view;
6310 	view->input = input_ref_view;
6311 	view->close = close_ref_view;
6312 	view->search_start = search_start_ref_view;
6313 	view->search_next = search_next_ref_view;
6314 done:
6315 	if (err)
6316 		free_colors(&s->colors);
6317 	return err;
6318 }
6319 
6320 static const struct got_error *
6321 close_ref_view(struct tog_view *view)
6322 {
6323 	struct tog_ref_view_state *s = &view->state.ref;
6324 
6325 	ref_view_free_refs(s);
6326 	free_colors(&s->colors);
6327 
6328 	return NULL;
6329 }
6330 
6331 static const struct got_error *
6332 resolve_reflist_entry(struct got_object_id **commit_id,
6333     struct tog_reflist_entry *re, struct got_repository *repo)
6334 {
6335 	const struct got_error *err = NULL;
6336 	struct got_object_id *obj_id;
6337 	struct got_tag_object *tag = NULL;
6338 	int obj_type;
6339 
6340 	*commit_id = NULL;
6341 
6342 	err = got_ref_resolve(&obj_id, repo, re->ref);
6343 	if (err)
6344 		return err;
6345 
6346 	err = got_object_get_type(&obj_type, repo, obj_id);
6347 	if (err)
6348 		goto done;
6349 
6350 	switch (obj_type) {
6351 	case GOT_OBJ_TYPE_COMMIT:
6352 		*commit_id = obj_id;
6353 		break;
6354 	case GOT_OBJ_TYPE_TAG:
6355 		err = got_object_open_as_tag(&tag, repo, obj_id);
6356 		if (err)
6357 			goto done;
6358 		free(obj_id);
6359 		err = got_object_get_type(&obj_type, repo,
6360 		    got_object_tag_get_object_id(tag));
6361 		if (err)
6362 			goto done;
6363 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6364 			err = got_error(GOT_ERR_OBJ_TYPE);
6365 			goto done;
6366 		}
6367 		*commit_id = got_object_id_dup(
6368 		    got_object_tag_get_object_id(tag));
6369 		if (*commit_id == NULL) {
6370 			err = got_error_from_errno("got_object_id_dup");
6371 			goto done;
6372 		}
6373 		break;
6374 	default:
6375 		err = got_error(GOT_ERR_OBJ_TYPE);
6376 		break;
6377 	}
6378 
6379 done:
6380 	if (tag)
6381 		got_object_tag_close(tag);
6382 	if (err) {
6383 		free(*commit_id);
6384 		*commit_id = NULL;
6385 	}
6386 	return err;
6387 }
6388 
6389 static const struct got_error *
6390 log_ref_entry(struct tog_view **new_view, int begin_x,
6391     struct tog_reflist_entry *re, struct got_repository *repo)
6392 {
6393 	struct tog_view *log_view;
6394 	const struct got_error *err = NULL;
6395 	struct got_object_id *commit_id = NULL;
6396 
6397 	*new_view = NULL;
6398 
6399 	err = resolve_reflist_entry(&commit_id, re, repo);
6400 	if (err) {
6401 		if (err->code != GOT_ERR_OBJ_TYPE)
6402 			return err;
6403 		else
6404 			return NULL;
6405 	}
6406 
6407 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6408 	if (log_view == NULL) {
6409 		err = got_error_from_errno("view_open");
6410 		goto done;
6411 	}
6412 
6413 	err = open_log_view(log_view, commit_id, repo,
6414 	    got_ref_get_name(re->ref), "", 0);
6415 done:
6416 	if (err)
6417 		view_close(log_view);
6418 	else
6419 		*new_view = log_view;
6420 	free(commit_id);
6421 	return err;
6422 }
6423 
6424 static void
6425 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6426 {
6427 	struct tog_reflist_entry *re;
6428 	int i = 0;
6429 
6430 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6431 		return;
6432 
6433 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6434 	while (i++ < maxscroll) {
6435 		if (re == NULL)
6436 			break;
6437 		s->first_displayed_entry = re;
6438 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6439 	}
6440 }
6441 
6442 static void
6443 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6444 {
6445 	struct tog_reflist_entry *next, *last;
6446 	int n = 0;
6447 
6448 	if (s->first_displayed_entry)
6449 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6450 	else
6451 		next = TAILQ_FIRST(&s->refs);
6452 
6453 	last = s->last_displayed_entry;
6454 	while (next && last && n++ < maxscroll) {
6455 		last = TAILQ_NEXT(last, entry);
6456 		if (last) {
6457 			s->first_displayed_entry = next;
6458 			next = TAILQ_NEXT(next, entry);
6459 		}
6460 	}
6461 }
6462 
6463 static const struct got_error *
6464 search_start_ref_view(struct tog_view *view)
6465 {
6466 	struct tog_ref_view_state *s = &view->state.ref;
6467 
6468 	s->matched_entry = NULL;
6469 	return NULL;
6470 }
6471 
6472 static int
6473 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6474 {
6475 	regmatch_t regmatch;
6476 
6477 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6478 	    0) == 0;
6479 }
6480 
6481 static const struct got_error *
6482 search_next_ref_view(struct tog_view *view)
6483 {
6484 	struct tog_ref_view_state *s = &view->state.ref;
6485 	struct tog_reflist_entry *re = NULL;
6486 
6487 	if (!view->searching) {
6488 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6489 		return NULL;
6490 	}
6491 
6492 	if (s->matched_entry) {
6493 		if (view->searching == TOG_SEARCH_FORWARD) {
6494 			if (s->selected_entry)
6495 				re = TAILQ_NEXT(s->selected_entry, entry);
6496 			else
6497 				re = TAILQ_PREV(s->selected_entry,
6498 				    tog_reflist_head, entry);
6499 		} else {
6500 			if (s->selected_entry == NULL)
6501 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6502 			else
6503 				re = TAILQ_PREV(s->selected_entry,
6504 				    tog_reflist_head, entry);
6505 		}
6506 	} else {
6507 		if (s->selected_entry)
6508 			re = s->selected_entry;
6509 		else if (view->searching == TOG_SEARCH_FORWARD)
6510 			re = TAILQ_FIRST(&s->refs);
6511 		else
6512 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6513 	}
6514 
6515 	while (1) {
6516 		if (re == NULL) {
6517 			if (s->matched_entry == NULL) {
6518 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6519 				return NULL;
6520 			}
6521 			if (view->searching == TOG_SEARCH_FORWARD)
6522 				re = TAILQ_FIRST(&s->refs);
6523 			else
6524 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6525 		}
6526 
6527 		if (match_reflist_entry(re, &view->regex)) {
6528 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6529 			s->matched_entry = re;
6530 			break;
6531 		}
6532 
6533 		if (view->searching == TOG_SEARCH_FORWARD)
6534 			re = TAILQ_NEXT(re, entry);
6535 		else
6536 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6537 	}
6538 
6539 	if (s->matched_entry) {
6540 		s->first_displayed_entry = s->matched_entry;
6541 		s->selected = 0;
6542 	}
6543 
6544 	return NULL;
6545 }
6546 
6547 static const struct got_error *
6548 show_ref_view(struct tog_view *view)
6549 {
6550 	const struct got_error *err = NULL;
6551 	struct tog_ref_view_state *s = &view->state.ref;
6552 	struct tog_reflist_entry *re;
6553 	char *line = NULL;
6554 	wchar_t *wline;
6555 	struct tog_color *tc;
6556 	int width, n;
6557 	int limit = view->nlines;
6558 
6559 	werase(view->window);
6560 
6561 	s->ndisplayed = 0;
6562 
6563 	if (limit == 0)
6564 		return NULL;
6565 
6566 	re = s->first_displayed_entry;
6567 
6568 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6569 	    s->nrefs) == -1)
6570 		return got_error_from_errno("asprintf");
6571 
6572 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6573 	if (err) {
6574 		free(line);
6575 		return err;
6576 	}
6577 	if (view_needs_focus_indication(view))
6578 		wstandout(view->window);
6579 	waddwstr(view->window, wline);
6580 	if (view_needs_focus_indication(view))
6581 		wstandend(view->window);
6582 	free(wline);
6583 	wline = NULL;
6584 	free(line);
6585 	line = NULL;
6586 	if (width < view->ncols - 1)
6587 		waddch(view->window, '\n');
6588 	if (--limit <= 0)
6589 		return NULL;
6590 
6591 	n = 0;
6592 	while (re && limit > 0) {
6593 		char *line = NULL;
6594 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6595 
6596 		if (s->show_date) {
6597 			struct got_commit_object *ci;
6598 			struct got_tag_object *tag;
6599 			struct got_object_id *id;
6600 			struct tm tm;
6601 			time_t t;
6602 
6603 			err = got_ref_resolve(&id, s->repo, re->ref);
6604 			if (err)
6605 				return err;
6606 			err = got_object_open_as_tag(&tag, s->repo, id);
6607 			if (err) {
6608 				if (err->code != GOT_ERR_OBJ_TYPE) {
6609 					free(id);
6610 					return err;
6611 				}
6612 				err = got_object_open_as_commit(&ci, s->repo,
6613 				    id);
6614 				if (err) {
6615 					free(id);
6616 					return err;
6617 				}
6618 				t = got_object_commit_get_committer_time(ci);
6619 				got_object_commit_close(ci);
6620 			} else {
6621 				t = got_object_tag_get_tagger_time(tag);
6622 				got_object_tag_close(tag);
6623 			}
6624 			free(id);
6625 			if (gmtime_r(&t, &tm) == NULL)
6626 				return got_error_from_errno("gmtime_r");
6627 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6628 				return got_error(GOT_ERR_NO_SPACE);
6629 		}
6630 		if (got_ref_is_symbolic(re->ref)) {
6631 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6632 			    ymd : "", got_ref_get_name(re->ref),
6633 			    got_ref_get_symref_target(re->ref)) == -1)
6634 				return got_error_from_errno("asprintf");
6635 		} else if (s->show_ids) {
6636 			struct got_object_id *id;
6637 			char *id_str;
6638 			err = got_ref_resolve(&id, s->repo, re->ref);
6639 			if (err)
6640 				return err;
6641 			err = got_object_id_str(&id_str, id);
6642 			if (err) {
6643 				free(id);
6644 				return err;
6645 			}
6646 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6647 			    got_ref_get_name(re->ref), id_str) == -1) {
6648 				err = got_error_from_errno("asprintf");
6649 				free(id);
6650 				free(id_str);
6651 				return err;
6652 			}
6653 			free(id);
6654 			free(id_str);
6655 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6656 		    got_ref_get_name(re->ref)) == -1)
6657 			return got_error_from_errno("asprintf");
6658 
6659 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6660 		    0, 0);
6661 		if (err) {
6662 			free(line);
6663 			return err;
6664 		}
6665 		if (n == s->selected) {
6666 			if (view->focussed)
6667 				wstandout(view->window);
6668 			s->selected_entry = re;
6669 		}
6670 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6671 		if (tc)
6672 			wattr_on(view->window,
6673 			    COLOR_PAIR(tc->colorpair), NULL);
6674 		waddwstr(view->window, wline);
6675 		if (tc)
6676 			wattr_off(view->window,
6677 			    COLOR_PAIR(tc->colorpair), NULL);
6678 		if (width < view->ncols - 1)
6679 			waddch(view->window, '\n');
6680 		if (n == s->selected && view->focussed)
6681 			wstandend(view->window);
6682 		free(line);
6683 		free(wline);
6684 		wline = NULL;
6685 		n++;
6686 		s->ndisplayed++;
6687 		s->last_displayed_entry = re;
6688 
6689 		limit--;
6690 		re = TAILQ_NEXT(re, entry);
6691 	}
6692 
6693 	view_vborder(view);
6694 	return err;
6695 }
6696 
6697 static const struct got_error *
6698 browse_ref_tree(struct tog_view **new_view, int begin_x,
6699     struct tog_reflist_entry *re, struct got_repository *repo)
6700 {
6701 	const struct got_error *err = NULL;
6702 	struct got_object_id *commit_id = NULL;
6703 	struct tog_view *tree_view;
6704 
6705 	*new_view = NULL;
6706 
6707 	err = resolve_reflist_entry(&commit_id, re, repo);
6708 	if (err) {
6709 		if (err->code != GOT_ERR_OBJ_TYPE)
6710 			return err;
6711 		else
6712 			return NULL;
6713 	}
6714 
6715 
6716 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6717 	if (tree_view == NULL) {
6718 		err = got_error_from_errno("view_open");
6719 		goto done;
6720 	}
6721 
6722 	err = open_tree_view(tree_view, commit_id,
6723 	    got_ref_get_name(re->ref), repo);
6724 	if (err)
6725 		goto done;
6726 
6727 	*new_view = tree_view;
6728 done:
6729 	free(commit_id);
6730 	return err;
6731 }
6732 static const struct got_error *
6733 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6734 {
6735 	const struct got_error *err = NULL;
6736 	struct tog_ref_view_state *s = &view->state.ref;
6737 	struct tog_view *log_view, *tree_view;
6738 	struct tog_reflist_entry *re;
6739 	int begin_x = 0, n, nscroll = view->nlines - 1;
6740 
6741 	switch (ch) {
6742 	case 'i':
6743 		s->show_ids = !s->show_ids;
6744 		break;
6745 	case 'm':
6746 		s->show_date = !s->show_date;
6747 		break;
6748 	case 'o':
6749 		s->sort_by_date = !s->sort_by_date;
6750 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6751 		    got_ref_cmp_by_commit_timestamp_descending :
6752 		    tog_ref_cmp_by_name, s->repo);
6753 		if (err)
6754 			break;
6755 		got_reflist_object_id_map_free(tog_refs_idmap);
6756 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6757 		    &tog_refs, s->repo);
6758 		if (err)
6759 			break;
6760 		ref_view_free_refs(s);
6761 		err = ref_view_load_refs(s);
6762 		break;
6763 	case KEY_ENTER:
6764 	case '\r':
6765 		if (!s->selected_entry)
6766 			break;
6767 		if (view_is_parent_view(view))
6768 			begin_x = view_split_begin_x(view->begin_x);
6769 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6770 		    s->repo);
6771 		view->focussed = 0;
6772 		log_view->focussed = 1;
6773 		if (view_is_parent_view(view)) {
6774 			err = view_close_child(view);
6775 			if (err)
6776 				return err;
6777 			err = view_set_child(view, log_view);
6778 			if (err)
6779 				return err;
6780 			view->focus_child = 1;
6781 		} else
6782 			*new_view = log_view;
6783 		break;
6784 	case 't':
6785 		if (!s->selected_entry)
6786 			break;
6787 		if (view_is_parent_view(view))
6788 			begin_x = view_split_begin_x(view->begin_x);
6789 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6790 		    s->repo);
6791 		if (err || tree_view == NULL)
6792 			break;
6793 		view->focussed = 0;
6794 		tree_view->focussed = 1;
6795 		if (view_is_parent_view(view)) {
6796 			err = view_close_child(view);
6797 			if (err)
6798 				return err;
6799 			err = view_set_child(view, tree_view);
6800 			if (err)
6801 				return err;
6802 			view->focus_child = 1;
6803 		} else
6804 			*new_view = tree_view;
6805 		break;
6806 	case 'g':
6807 	case KEY_HOME:
6808 		s->selected = 0;
6809 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6810 		break;
6811 	case 'G':
6812 	case KEY_END:
6813 		s->selected = 0;
6814 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6815 		for (n = 0; n < view->nlines - 1; n++) {
6816 			if (re == NULL)
6817 				break;
6818 			s->first_displayed_entry = re;
6819 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6820 		}
6821 		if (n > 0)
6822 			s->selected = n - 1;
6823 		break;
6824 	case 'k':
6825 	case KEY_UP:
6826 	case CTRL('p'):
6827 		if (s->selected > 0) {
6828 			s->selected--;
6829 			break;
6830 		}
6831 		ref_scroll_up(s, 1);
6832 		break;
6833 	case CTRL('u'):
6834 	case 'u':
6835 		nscroll /= 2;
6836 		/* FALL THROUGH */
6837 	case KEY_PPAGE:
6838 	case CTRL('b'):
6839 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6840 			s->selected -= MIN(nscroll, s->selected);
6841 		ref_scroll_up(s, MAX(0, nscroll));
6842 		break;
6843 	case 'j':
6844 	case KEY_DOWN:
6845 	case CTRL('n'):
6846 		if (s->selected < s->ndisplayed - 1) {
6847 			s->selected++;
6848 			break;
6849 		}
6850 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6851 			/* can't scroll any further */
6852 			break;
6853 		ref_scroll_down(s, 1);
6854 		break;
6855 	case CTRL('d'):
6856 	case 'd':
6857 		nscroll /= 2;
6858 		/* FALL THROUGH */
6859 	case KEY_NPAGE:
6860 	case CTRL('f'):
6861 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6862 			/* can't scroll any further; move cursor down */
6863 			if (s->selected < s->ndisplayed - 1)
6864 				s->selected += MIN(nscroll,
6865 				    s->ndisplayed - s->selected - 1);
6866 			break;
6867 		}
6868 		ref_scroll_down(s, nscroll);
6869 		break;
6870 	case CTRL('l'):
6871 		tog_free_refs();
6872 		err = tog_load_refs(s->repo, s->sort_by_date);
6873 		if (err)
6874 			break;
6875 		ref_view_free_refs(s);
6876 		err = ref_view_load_refs(s);
6877 		break;
6878 	case KEY_RESIZE:
6879 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6880 			s->selected = view->nlines - 2;
6881 		break;
6882 	default:
6883 		break;
6884 	}
6885 
6886 	return err;
6887 }
6888 
6889 __dead static void
6890 usage_ref(void)
6891 {
6892 	endwin();
6893 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6894 	    getprogname());
6895 	exit(1);
6896 }
6897 
6898 static const struct got_error *
6899 cmd_ref(int argc, char *argv[])
6900 {
6901 	const struct got_error *error;
6902 	struct got_repository *repo = NULL;
6903 	struct got_worktree *worktree = NULL;
6904 	char *cwd = NULL, *repo_path = NULL;
6905 	int ch;
6906 	struct tog_view *view;
6907 	int *pack_fds = NULL;
6908 
6909 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6910 		switch (ch) {
6911 		case 'r':
6912 			repo_path = realpath(optarg, NULL);
6913 			if (repo_path == NULL)
6914 				return got_error_from_errno2("realpath",
6915 				    optarg);
6916 			break;
6917 		default:
6918 			usage_ref();
6919 			/* NOTREACHED */
6920 		}
6921 	}
6922 
6923 	argc -= optind;
6924 	argv += optind;
6925 
6926 	if (argc > 1)
6927 		usage_ref();
6928 
6929 	error = got_repo_pack_fds_open(&pack_fds);
6930 	if (error != NULL)
6931 		goto done;
6932 
6933 	if (repo_path == NULL) {
6934 		cwd = getcwd(NULL, 0);
6935 		if (cwd == NULL)
6936 			return got_error_from_errno("getcwd");
6937 		error = got_worktree_open(&worktree, cwd);
6938 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6939 			goto done;
6940 		if (worktree)
6941 			repo_path =
6942 			    strdup(got_worktree_get_repo_path(worktree));
6943 		else
6944 			repo_path = strdup(cwd);
6945 		if (repo_path == NULL) {
6946 			error = got_error_from_errno("strdup");
6947 			goto done;
6948 		}
6949 	}
6950 
6951 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6952 	if (error != NULL)
6953 		goto done;
6954 
6955 	init_curses();
6956 
6957 	error = apply_unveil(got_repo_get_path(repo), NULL);
6958 	if (error)
6959 		goto done;
6960 
6961 	error = tog_load_refs(repo, 0);
6962 	if (error)
6963 		goto done;
6964 
6965 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6966 	if (view == NULL) {
6967 		error = got_error_from_errno("view_open");
6968 		goto done;
6969 	}
6970 
6971 	error = open_ref_view(view, repo);
6972 	if (error)
6973 		goto done;
6974 
6975 	if (worktree) {
6976 		/* Release work tree lock. */
6977 		got_worktree_close(worktree);
6978 		worktree = NULL;
6979 	}
6980 	error = view_loop(view);
6981 done:
6982 	free(repo_path);
6983 	free(cwd);
6984 	if (repo) {
6985 		const struct got_error *close_err = got_repo_close(repo);
6986 		if (close_err)
6987 			error = close_err;
6988 	}
6989 	if (pack_fds) {
6990 		const struct got_error *pack_err =
6991 		    got_repo_pack_fds_close(pack_fds);
6992 		if (error == NULL)
6993 			error = pack_err;
6994 	}
6995 	tog_free_refs();
6996 	return error;
6997 }
6998 
6999 static void
7000 list_commands(FILE *fp)
7001 {
7002 	size_t i;
7003 
7004 	fprintf(fp, "commands:");
7005 	for (i = 0; i < nitems(tog_commands); i++) {
7006 		const struct tog_cmd *cmd = &tog_commands[i];
7007 		fprintf(fp, " %s", cmd->name);
7008 	}
7009 	fputc('\n', fp);
7010 }
7011 
7012 __dead static void
7013 usage(int hflag, int status)
7014 {
7015 	FILE *fp = (status == 0) ? stdout : stderr;
7016 
7017 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7018 	    getprogname());
7019 	if (hflag) {
7020 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7021 		list_commands(fp);
7022 	}
7023 	exit(status);
7024 }
7025 
7026 static char **
7027 make_argv(int argc, ...)
7028 {
7029 	va_list ap;
7030 	char **argv;
7031 	int i;
7032 
7033 	va_start(ap, argc);
7034 
7035 	argv = calloc(argc, sizeof(char *));
7036 	if (argv == NULL)
7037 		err(1, "calloc");
7038 	for (i = 0; i < argc; i++) {
7039 		argv[i] = strdup(va_arg(ap, char *));
7040 		if (argv[i] == NULL)
7041 			err(1, "strdup");
7042 	}
7043 
7044 	va_end(ap);
7045 	return argv;
7046 }
7047 
7048 /*
7049  * Try to convert 'tog path' into a 'tog log path' command.
7050  * The user could simply have mistyped the command rather than knowingly
7051  * provided a path. So check whether argv[0] can in fact be resolved
7052  * to a path in the HEAD commit and print a special error if not.
7053  * This hack is for mpi@ <3
7054  */
7055 static const struct got_error *
7056 tog_log_with_path(int argc, char *argv[])
7057 {
7058 	const struct got_error *error = NULL, *close_err;
7059 	const struct tog_cmd *cmd = NULL;
7060 	struct got_repository *repo = NULL;
7061 	struct got_worktree *worktree = NULL;
7062 	struct got_object_id *commit_id = NULL, *id = NULL;
7063 	struct got_commit_object *commit = NULL;
7064 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7065 	char *commit_id_str = NULL, **cmd_argv = NULL;
7066 	int *pack_fds = NULL;
7067 
7068 	cwd = getcwd(NULL, 0);
7069 	if (cwd == NULL)
7070 		return got_error_from_errno("getcwd");
7071 
7072 	error = got_repo_pack_fds_open(&pack_fds);
7073 	if (error != NULL)
7074 		goto done;
7075 
7076 	error = got_worktree_open(&worktree, cwd);
7077 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7078 		goto done;
7079 
7080 	if (worktree)
7081 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7082 	else
7083 		repo_path = strdup(cwd);
7084 	if (repo_path == NULL) {
7085 		error = got_error_from_errno("strdup");
7086 		goto done;
7087 	}
7088 
7089 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7090 	if (error != NULL)
7091 		goto done;
7092 
7093 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7094 	    repo, worktree);
7095 	if (error)
7096 		goto done;
7097 
7098 	error = tog_load_refs(repo, 0);
7099 	if (error)
7100 		goto done;
7101 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7102 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7103 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7104 	if (error)
7105 		goto done;
7106 
7107 	if (worktree) {
7108 		got_worktree_close(worktree);
7109 		worktree = NULL;
7110 	}
7111 
7112 	error = got_object_open_as_commit(&commit, repo, commit_id);
7113 	if (error)
7114 		goto done;
7115 
7116 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7117 	if (error) {
7118 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7119 			goto done;
7120 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7121 		    getprogname(), argv[0]);
7122 		usage(1, 1);
7123 		/* not reached */
7124 	}
7125 
7126 	close_err = got_repo_close(repo);
7127 	if (error == NULL)
7128 		error = close_err;
7129 	repo = NULL;
7130 
7131 	error = got_object_id_str(&commit_id_str, commit_id);
7132 	if (error)
7133 		goto done;
7134 
7135 	cmd = &tog_commands[0]; /* log */
7136 	argc = 4;
7137 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7138 	error = cmd->cmd_main(argc, cmd_argv);
7139 done:
7140 	if (repo) {
7141 		close_err = got_repo_close(repo);
7142 		if (error == NULL)
7143 			error = close_err;
7144 	}
7145 	if (commit)
7146 		got_object_commit_close(commit);
7147 	if (worktree)
7148 		got_worktree_close(worktree);
7149 	if (pack_fds) {
7150 		const struct got_error *pack_err =
7151 		    got_repo_pack_fds_close(pack_fds);
7152 		if (error == NULL)
7153 			error = pack_err;
7154 	}
7155 	free(id);
7156 	free(commit_id_str);
7157 	free(commit_id);
7158 	free(cwd);
7159 	free(repo_path);
7160 	free(in_repo_path);
7161 	if (cmd_argv) {
7162 		int i;
7163 		for (i = 0; i < argc; i++)
7164 			free(cmd_argv[i]);
7165 		free(cmd_argv);
7166 	}
7167 	tog_free_refs();
7168 	return error;
7169 }
7170 
7171 int
7172 main(int argc, char *argv[])
7173 {
7174 	const struct got_error *error = NULL;
7175 	const struct tog_cmd *cmd = NULL;
7176 	int ch, hflag = 0, Vflag = 0;
7177 	char **cmd_argv = NULL;
7178 	static const struct option longopts[] = {
7179 	    { "version", no_argument, NULL, 'V' },
7180 	    { NULL, 0, NULL, 0}
7181 	};
7182 
7183 	setlocale(LC_CTYPE, "");
7184 
7185 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7186 		switch (ch) {
7187 		case 'h':
7188 			hflag = 1;
7189 			break;
7190 		case 'V':
7191 			Vflag = 1;
7192 			break;
7193 		default:
7194 			usage(hflag, 1);
7195 			/* NOTREACHED */
7196 		}
7197 	}
7198 
7199 	argc -= optind;
7200 	argv += optind;
7201 	optind = 1;
7202 	optreset = 1;
7203 
7204 	if (Vflag) {
7205 		got_version_print_str();
7206 		return 0;
7207 	}
7208 
7209 #ifndef PROFILE
7210 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7211 	    NULL) == -1)
7212 		err(1, "pledge");
7213 #endif
7214 
7215 	if (argc == 0) {
7216 		if (hflag)
7217 			usage(hflag, 0);
7218 		/* Build an argument vector which runs a default command. */
7219 		cmd = &tog_commands[0];
7220 		argc = 1;
7221 		cmd_argv = make_argv(argc, cmd->name);
7222 	} else {
7223 		size_t i;
7224 
7225 		/* Did the user specify a command? */
7226 		for (i = 0; i < nitems(tog_commands); i++) {
7227 			if (strncmp(tog_commands[i].name, argv[0],
7228 			    strlen(argv[0])) == 0) {
7229 				cmd = &tog_commands[i];
7230 				break;
7231 			}
7232 		}
7233 	}
7234 
7235 	if (cmd == NULL) {
7236 		if (argc != 1)
7237 			usage(0, 1);
7238 		/* No command specified; try log with a path */
7239 		error = tog_log_with_path(argc, argv);
7240 	} else {
7241 		if (hflag)
7242 			cmd->cmd_usage();
7243 		else
7244 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7245 	}
7246 
7247 	endwin();
7248 	putchar('\n');
7249 	if (cmd_argv) {
7250 		int i;
7251 		for (i = 0; i < argc; i++)
7252 			free(cmd_argv[i]);
7253 		free(cmd_argv);
7254 	}
7255 
7256 	if (error && error->code != GOT_ERR_CANCELLED)
7257 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7258 	return 0;
7259 }