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