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