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