1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #define _XOPEN_SOURCE_EXTENDED
24 #include <curses.h>
25 #undef _XOPEN_SOURCE_EXTENDED
26 #include <panel.h>
27 #include <locale.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <getopt.h>
33 #include <string.h>
34 #include <err.h>
35 #include <unistd.h>
36 #include <limits.h>
37 #include <wchar.h>
38 #include <time.h>
39 #include <pthread.h>
40 #include <libgen.h>
41 #include <regex.h>
42 
43 #include "got_version.h"
44 #include "got_error.h"
45 #include "got_object.h"
46 #include "got_reference.h"
47 #include "got_repository.h"
48 #include "got_diff.h"
49 #include "got_opentemp.h"
50 #include "got_utf8.h"
51 #include "got_cancel.h"
52 #include "got_commit_graph.h"
53 #include "got_blame.h"
54 #include "got_privsep.h"
55 #include "got_path.h"
56 #include "got_worktree.h"
57 
58 #ifndef MIN
59 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
60 #endif
61 
62 #ifndef MAX
63 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
64 #endif
65 
66 #define CTRL(x)		((x) & 0x1f)
67 
68 #ifndef nitems
69 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
70 #endif
71 
72 struct tog_cmd {
73 	const char *name;
74 	const struct got_error *(*cmd_main)(int, char *[]);
75 	void (*cmd_usage)(void);
76 };
77 
78 __dead static void	usage(int, int);
79 __dead static void	usage_log(void);
80 __dead static void	usage_diff(void);
81 __dead static void	usage_blame(void);
82 __dead static void	usage_tree(void);
83 __dead static void	usage_ref(void);
84 
85 static const struct got_error*	cmd_log(int, char *[]);
86 static const struct got_error*	cmd_diff(int, char *[]);
87 static const struct got_error*	cmd_blame(int, char *[]);
88 static const struct got_error*	cmd_tree(int, char *[]);
89 static const struct got_error*	cmd_ref(int, char *[]);
90 
91 static struct tog_cmd tog_commands[] = {
92 	{ "log",	cmd_log,	usage_log },
93 	{ "diff",	cmd_diff,	usage_diff },
94 	{ "blame",	cmd_blame,	usage_blame },
95 	{ "tree",	cmd_tree,	usage_tree },
96 	{ "ref",	cmd_ref,	usage_ref },
97 };
98 
99 enum tog_view_type {
100 	TOG_VIEW_DIFF,
101 	TOG_VIEW_LOG,
102 	TOG_VIEW_BLAME,
103 	TOG_VIEW_TREE,
104 	TOG_VIEW_REF,
105 };
106 
107 #define TOG_EOF_STRING	"(END)"
108 
109 struct commit_queue_entry {
110 	TAILQ_ENTRY(commit_queue_entry) entry;
111 	struct got_object_id *id;
112 	struct got_commit_object *commit;
113 	int idx;
114 };
115 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
116 struct commit_queue {
117 	int ncommits;
118 	struct commit_queue_head head;
119 };
120 
121 struct tog_color {
122 	SIMPLEQ_ENTRY(tog_color) entry;
123 	regex_t regex;
124 	short colorpair;
125 };
126 SIMPLEQ_HEAD(tog_colors, tog_color);
127 
128 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
129 static struct got_reflist_object_id_map *tog_refs_idmap;
130 
131 static const struct got_error *
132 tog_load_refs(struct got_repository *repo)
133 {
134 	const struct got_error *err;
135 
136 	err = got_ref_list(&tog_refs, repo, NULL, got_ref_cmp_by_name, NULL);
137 	if (err)
138 		return err;
139 
140 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
141 	    repo);
142 }
143 
144 static void
145 tog_free_refs(void)
146 {
147 	if (tog_refs_idmap) {
148 		got_reflist_object_id_map_free(tog_refs_idmap);
149 		tog_refs_idmap = NULL;
150 	}
151 	got_ref_list_free(&tog_refs);
152 }
153 
154 static const struct got_error *
155 add_color(struct tog_colors *colors, const char *pattern,
156     int idx, short color)
157 {
158 	const struct got_error *err = NULL;
159 	struct tog_color *tc;
160 	int regerr = 0;
161 
162 	if (idx < 1 || idx > COLOR_PAIRS - 1)
163 		return NULL;
164 
165 	init_pair(idx, color, -1);
166 
167 	tc = calloc(1, sizeof(*tc));
168 	if (tc == NULL)
169 		return got_error_from_errno("calloc");
170 	regerr = regcomp(&tc->regex, pattern,
171 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
172 	if (regerr) {
173 		static char regerr_msg[512];
174 		static char err_msg[512];
175 		regerror(regerr, &tc->regex, regerr_msg,
176 		    sizeof(regerr_msg));
177 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
178 		    regerr_msg);
179 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
180 		free(tc);
181 		return err;
182 	}
183 	tc->colorpair = idx;
184 	SIMPLEQ_INSERT_HEAD(colors, tc, entry);
185 	return NULL;
186 }
187 
188 static void
189 free_colors(struct tog_colors *colors)
190 {
191 	struct tog_color *tc;
192 
193 	while (!SIMPLEQ_EMPTY(colors)) {
194 		tc = SIMPLEQ_FIRST(colors);
195 		SIMPLEQ_REMOVE_HEAD(colors, entry);
196 		regfree(&tc->regex);
197 		free(tc);
198 	}
199 }
200 
201 struct tog_color *
202 get_color(struct tog_colors *colors, int colorpair)
203 {
204 	struct tog_color *tc = NULL;
205 
206 	SIMPLEQ_FOREACH(tc, colors, entry) {
207 		if (tc->colorpair == colorpair)
208 			return tc;
209 	}
210 
211 	return NULL;
212 }
213 
214 static int
215 default_color_value(const char *envvar)
216 {
217 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
218 		return COLOR_MAGENTA;
219 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
220 		return COLOR_CYAN;
221 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
222 		return COLOR_YELLOW;
223 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
224 		return COLOR_GREEN;
225 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
226 		return COLOR_MAGENTA;
227 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
228 		return COLOR_MAGENTA;
229 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
230 		return COLOR_CYAN;
231 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
232 		return COLOR_GREEN;
233 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
234 		return COLOR_GREEN;
235 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
236 		return COLOR_CYAN;
237 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
238 		return COLOR_YELLOW;
239 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
240 		return COLOR_GREEN;
241 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
242 		return COLOR_MAGENTA;
243 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
244 		return COLOR_YELLOW;
245 
246 	return -1;
247 }
248 
249 static int
250 get_color_value(const char *envvar)
251 {
252 	const char *val = getenv(envvar);
253 
254 	if (val == NULL)
255 		return default_color_value(envvar);
256 
257 	if (strcasecmp(val, "black") == 0)
258 		return COLOR_BLACK;
259 	if (strcasecmp(val, "red") == 0)
260 		return COLOR_RED;
261 	if (strcasecmp(val, "green") == 0)
262 		return COLOR_GREEN;
263 	if (strcasecmp(val, "yellow") == 0)
264 		return COLOR_YELLOW;
265 	if (strcasecmp(val, "blue") == 0)
266 		return COLOR_BLUE;
267 	if (strcasecmp(val, "magenta") == 0)
268 		return COLOR_MAGENTA;
269 	if (strcasecmp(val, "cyan") == 0)
270 		return COLOR_CYAN;
271 	if (strcasecmp(val, "white") == 0)
272 		return COLOR_WHITE;
273 	if (strcasecmp(val, "default") == 0)
274 		return -1;
275 
276 	return default_color_value(envvar);
277 }
278 
279 
280 struct tog_diff_view_state {
281 	struct got_object_id *id1, *id2;
282 	const char *label1, *label2;
283 	FILE *f;
284 	int first_displayed_line;
285 	int last_displayed_line;
286 	int eof;
287 	int diff_context;
288 	int ignore_whitespace;
289 	int force_text_diff;
290 	struct got_repository *repo;
291 	struct tog_colors colors;
292 	size_t nlines;
293 	off_t *line_offsets;
294 	int matched_line;
295 	int selected_line;
296 
297 	/* passed from log view; may be NULL */
298 	struct tog_view *log_view;
299 };
300 
301 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
302 
303 struct tog_log_thread_args {
304 	pthread_cond_t need_commits;
305 	pthread_cond_t commit_loaded;
306 	int commits_needed;
307 	struct got_commit_graph *graph;
308 	struct commit_queue *commits;
309 	const char *in_repo_path;
310 	struct got_object_id *start_id;
311 	struct got_repository *repo;
312 	int log_complete;
313 	sig_atomic_t *quit;
314 	struct commit_queue_entry **first_displayed_entry;
315 	struct commit_queue_entry **selected_entry;
316 	int *searching;
317 	int *search_next_done;
318 	regex_t *regex;
319 };
320 
321 struct tog_log_view_state {
322 	struct commit_queue commits;
323 	struct commit_queue_entry *first_displayed_entry;
324 	struct commit_queue_entry *last_displayed_entry;
325 	struct commit_queue_entry *selected_entry;
326 	int selected;
327 	char *in_repo_path;
328 	char *head_ref_name;
329 	int log_branches;
330 	struct got_repository *repo;
331 	struct got_object_id *start_id;
332 	sig_atomic_t quit;
333 	pthread_t thread;
334 	struct tog_log_thread_args thread_args;
335 	struct commit_queue_entry *matched_entry;
336 	struct commit_queue_entry *search_entry;
337 	struct tog_colors colors;
338 };
339 
340 #define TOG_COLOR_DIFF_MINUS		1
341 #define TOG_COLOR_DIFF_PLUS		2
342 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
343 #define TOG_COLOR_DIFF_META		4
344 #define TOG_COLOR_TREE_SUBMODULE	5
345 #define TOG_COLOR_TREE_SYMLINK		6
346 #define TOG_COLOR_TREE_DIRECTORY	7
347 #define TOG_COLOR_TREE_EXECUTABLE	8
348 #define TOG_COLOR_COMMIT		9
349 #define TOG_COLOR_AUTHOR		10
350 #define TOG_COLOR_DATE			11
351 #define TOG_COLOR_REFS_HEADS		12
352 #define TOG_COLOR_REFS_TAGS		13
353 #define TOG_COLOR_REFS_REMOTES		14
354 
355 struct tog_blame_cb_args {
356 	struct tog_blame_line *lines; /* one per line */
357 	int nlines;
358 
359 	struct tog_view *view;
360 	struct got_object_id *commit_id;
361 	int *quit;
362 };
363 
364 struct tog_blame_thread_args {
365 	const char *path;
366 	struct got_repository *repo;
367 	struct tog_blame_cb_args *cb_args;
368 	int *complete;
369 	got_cancel_cb cancel_cb;
370 	void *cancel_arg;
371 };
372 
373 struct tog_blame {
374 	FILE *f;
375 	off_t filesize;
376 	struct tog_blame_line *lines;
377 	int nlines;
378 	off_t *line_offsets;
379 	pthread_t thread;
380 	struct tog_blame_thread_args thread_args;
381 	struct tog_blame_cb_args cb_args;
382 	const char *path;
383 };
384 
385 struct tog_blame_view_state {
386 	int first_displayed_line;
387 	int last_displayed_line;
388 	int selected_line;
389 	int blame_complete;
390 	int eof;
391 	int done;
392 	struct got_object_id_queue blamed_commits;
393 	struct got_object_qid *blamed_commit;
394 	char *path;
395 	struct got_repository *repo;
396 	struct got_object_id *commit_id;
397 	struct tog_blame blame;
398 	int matched_line;
399 	struct tog_colors colors;
400 };
401 
402 struct tog_parent_tree {
403 	TAILQ_ENTRY(tog_parent_tree) entry;
404 	struct got_tree_object *tree;
405 	struct got_tree_entry *first_displayed_entry;
406 	struct got_tree_entry *selected_entry;
407 	int selected;
408 };
409 
410 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
411 
412 struct tog_tree_view_state {
413 	char *tree_label;
414 	struct got_tree_object *root;
415 	struct got_tree_object *tree;
416 	struct got_tree_entry *first_displayed_entry;
417 	struct got_tree_entry *last_displayed_entry;
418 	struct got_tree_entry *selected_entry;
419 	int ndisplayed, selected, show_ids;
420 	struct tog_parent_trees parents;
421 	struct got_object_id *commit_id;
422 	char *head_ref_name;
423 	struct got_repository *repo;
424 	struct got_tree_entry *matched_entry;
425 	struct tog_colors colors;
426 };
427 
428 struct tog_reflist_entry {
429 	TAILQ_ENTRY(tog_reflist_entry) entry;
430 	struct got_reference *ref;
431 	int idx;
432 };
433 
434 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
435 
436 struct tog_ref_view_state {
437 	struct tog_reflist_head refs;
438 	struct tog_reflist_entry *first_displayed_entry;
439 	struct tog_reflist_entry *last_displayed_entry;
440 	struct tog_reflist_entry *selected_entry;
441 	int nrefs, ndisplayed, selected, show_ids;
442 	struct got_repository *repo;
443 	struct tog_reflist_entry *matched_entry;
444 	struct tog_colors colors;
445 };
446 
447 /*
448  * We implement two types of views: parent views and child views.
449  *
450  * The 'Tab' key switches focus between a parent view and its child view.
451  * Child views are shown side-by-side to their parent view, provided
452  * there is enough screen estate.
453  *
454  * When a new view is opened from within a parent view, this new view
455  * becomes a child view of the parent view, replacing any existing child.
456  *
457  * When a new view is opened from within a child view, this new view
458  * becomes a parent view which will obscure the views below until the
459  * user quits the new parent view by typing 'q'.
460  *
461  * This list of views contains parent views only.
462  * Child views are only pointed to by their parent view.
463  */
464 TAILQ_HEAD(tog_view_list_head, tog_view);
465 
466 struct tog_view {
467 	TAILQ_ENTRY(tog_view) entry;
468 	WINDOW *window;
469 	PANEL *panel;
470 	int nlines, ncols, begin_y, begin_x;
471 	int lines, cols; /* copies of LINES and COLS */
472 	int focussed; /* Only set on one parent or child view at a time. */
473 	int dying;
474 	struct tog_view *parent;
475 	struct tog_view *child;
476 
477 	/*
478 	 * This flag is initially set on parent views when a new child view
479 	 * is created. It gets toggled when the 'Tab' key switches focus
480 	 * between parent and child.
481 	 * The flag indicates whether focus should be passed on to our child
482 	 * view if this parent view gets picked for focus after another parent
483 	 * view was closed. This prevents child views from losing focus in such
484 	 * situations.
485 	 */
486 	int focus_child;
487 
488 	/* type-specific state */
489 	enum tog_view_type type;
490 	union {
491 		struct tog_diff_view_state diff;
492 		struct tog_log_view_state log;
493 		struct tog_blame_view_state blame;
494 		struct tog_tree_view_state tree;
495 		struct tog_ref_view_state ref;
496 	} state;
497 
498 	const struct got_error *(*show)(struct tog_view *);
499 	const struct got_error *(*input)(struct tog_view **,
500 	    struct tog_view *, int);
501 	const struct got_error *(*close)(struct tog_view *);
502 
503 	const struct got_error *(*search_start)(struct tog_view *);
504 	const struct got_error *(*search_next)(struct tog_view *);
505 	int search_started;
506 	int searching;
507 #define TOG_SEARCH_FORWARD	1
508 #define TOG_SEARCH_BACKWARD	2
509 	int search_next_done;
510 #define TOG_SEARCH_HAVE_MORE	1
511 #define TOG_SEARCH_NO_MORE	2
512 #define TOG_SEARCH_HAVE_NONE	3
513 	regex_t regex;
514 	regmatch_t regmatch;
515 };
516 
517 static const struct got_error *open_diff_view(struct tog_view *,
518     struct got_object_id *, struct got_object_id *,
519     const char *, const char *, int, int, int, struct tog_view *,
520     struct got_repository *);
521 static const struct got_error *show_diff_view(struct tog_view *);
522 static const struct got_error *input_diff_view(struct tog_view **,
523     struct tog_view *, int);
524 static const struct got_error* close_diff_view(struct tog_view *);
525 static const struct got_error *search_start_diff_view(struct tog_view *);
526 static const struct got_error *search_next_diff_view(struct tog_view *);
527 
528 static const struct got_error *open_log_view(struct tog_view *,
529     struct got_object_id *, struct got_repository *,
530     const char *, const char *, int);
531 static const struct got_error * show_log_view(struct tog_view *);
532 static const struct got_error *input_log_view(struct tog_view **,
533     struct tog_view *, int);
534 static const struct got_error *close_log_view(struct tog_view *);
535 static const struct got_error *search_start_log_view(struct tog_view *);
536 static const struct got_error *search_next_log_view(struct tog_view *);
537 
538 static const struct got_error *open_blame_view(struct tog_view *, char *,
539     struct got_object_id *, struct got_repository *);
540 static const struct got_error *show_blame_view(struct tog_view *);
541 static const struct got_error *input_blame_view(struct tog_view **,
542     struct tog_view *, int);
543 static const struct got_error *close_blame_view(struct tog_view *);
544 static const struct got_error *search_start_blame_view(struct tog_view *);
545 static const struct got_error *search_next_blame_view(struct tog_view *);
546 
547 static const struct got_error *open_tree_view(struct tog_view *,
548     struct got_tree_object *, struct got_object_id *, const char *,
549     struct got_repository *);
550 static const struct got_error *show_tree_view(struct tog_view *);
551 static const struct got_error *input_tree_view(struct tog_view **,
552     struct tog_view *, int);
553 static const struct got_error *close_tree_view(struct tog_view *);
554 static const struct got_error *search_start_tree_view(struct tog_view *);
555 static const struct got_error *search_next_tree_view(struct tog_view *);
556 
557 static const struct got_error *open_ref_view(struct tog_view *,
558     struct got_repository *);
559 static const struct got_error *show_ref_view(struct tog_view *);
560 static const struct got_error *input_ref_view(struct tog_view **,
561     struct tog_view *, int);
562 static const struct got_error *close_ref_view(struct tog_view *);
563 static const struct got_error *search_start_ref_view(struct tog_view *);
564 static const struct got_error *search_next_ref_view(struct tog_view *);
565 
566 static volatile sig_atomic_t tog_sigwinch_received;
567 static volatile sig_atomic_t tog_sigpipe_received;
568 static volatile sig_atomic_t tog_sigcont_received;
569 
570 static void
571 tog_sigwinch(int signo)
572 {
573 	tog_sigwinch_received = 1;
574 }
575 
576 static void
577 tog_sigpipe(int signo)
578 {
579 	tog_sigpipe_received = 1;
580 }
581 
582 static void
583 tog_sigcont(int signo)
584 {
585 	tog_sigcont_received = 1;
586 }
587 
588 static const struct got_error *
589 view_close(struct tog_view *view)
590 {
591 	const struct got_error *err = NULL;
592 
593 	if (view->child) {
594 		view_close(view->child);
595 		view->child = NULL;
596 	}
597 	if (view->close)
598 		err = view->close(view);
599 	if (view->panel)
600 		del_panel(view->panel);
601 	if (view->window)
602 		delwin(view->window);
603 	free(view);
604 	return err;
605 }
606 
607 static struct tog_view *
608 view_open(int nlines, int ncols, int begin_y, int begin_x,
609     enum tog_view_type type)
610 {
611 	struct tog_view *view = calloc(1, sizeof(*view));
612 
613 	if (view == NULL)
614 		return NULL;
615 
616 	view->type = type;
617 	view->lines = LINES;
618 	view->cols = COLS;
619 	view->nlines = nlines ? nlines : LINES - begin_y;
620 	view->ncols = ncols ? ncols : COLS - begin_x;
621 	view->begin_y = begin_y;
622 	view->begin_x = begin_x;
623 	view->window = newwin(nlines, ncols, begin_y, begin_x);
624 	if (view->window == NULL) {
625 		view_close(view);
626 		return NULL;
627 	}
628 	view->panel = new_panel(view->window);
629 	if (view->panel == NULL ||
630 	    set_panel_userptr(view->panel, view) != OK) {
631 		view_close(view);
632 		return NULL;
633 	}
634 
635 	keypad(view->window, TRUE);
636 	return view;
637 }
638 
639 static int
640 view_split_begin_x(int begin_x)
641 {
642 	if (begin_x > 0 || COLS < 120)
643 		return 0;
644 	return (COLS - MAX(COLS / 2, 80));
645 }
646 
647 static const struct got_error *view_resize(struct tog_view *);
648 
649 static const struct got_error *
650 view_splitscreen(struct tog_view *view)
651 {
652 	const struct got_error *err = NULL;
653 
654 	view->begin_y = 0;
655 	view->begin_x = view_split_begin_x(0);
656 	view->nlines = LINES;
657 	view->ncols = COLS - view->begin_x;
658 	view->lines = LINES;
659 	view->cols = COLS;
660 	err = view_resize(view);
661 	if (err)
662 		return err;
663 
664 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
665 		return got_error_from_errno("mvwin");
666 
667 	return NULL;
668 }
669 
670 static const struct got_error *
671 view_fullscreen(struct tog_view *view)
672 {
673 	const struct got_error *err = NULL;
674 
675 	view->begin_x = 0;
676 	view->begin_y = 0;
677 	view->nlines = LINES;
678 	view->ncols = COLS;
679 	view->lines = LINES;
680 	view->cols = COLS;
681 	err = view_resize(view);
682 	if (err)
683 		return err;
684 
685 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
686 		return got_error_from_errno("mvwin");
687 
688 	return NULL;
689 }
690 
691 static int
692 view_is_parent_view(struct tog_view *view)
693 {
694 	return view->parent == NULL;
695 }
696 
697 static const struct got_error *
698 view_resize(struct tog_view *view)
699 {
700 	int nlines, ncols;
701 
702 	if (view->lines > LINES)
703 		nlines = view->nlines - (view->lines - LINES);
704 	else
705 		nlines = view->nlines + (LINES - view->lines);
706 
707 	if (view->cols > COLS)
708 		ncols = view->ncols - (view->cols - COLS);
709 	else
710 		ncols = view->ncols + (COLS - view->cols);
711 
712 	if (wresize(view->window, nlines, ncols) == ERR)
713 		return got_error_from_errno("wresize");
714 	if (replace_panel(view->panel, view->window) == ERR)
715 		return got_error_from_errno("replace_panel");
716 	wclear(view->window);
717 
718 	view->nlines = nlines;
719 	view->ncols = ncols;
720 	view->lines = LINES;
721 	view->cols = COLS;
722 
723 	if (view->child) {
724 		view->child->begin_x = view_split_begin_x(view->begin_x);
725 		if (view->child->begin_x == 0) {
726 			view_fullscreen(view->child);
727 			if (view->child->focussed)
728 				show_panel(view->child->panel);
729 			else
730 				show_panel(view->panel);
731 		} else {
732 			view_splitscreen(view->child);
733 			show_panel(view->child->panel);
734 		}
735 	}
736 
737 	return NULL;
738 }
739 
740 static const struct got_error *
741 view_close_child(struct tog_view *view)
742 {
743 	const struct got_error *err = NULL;
744 
745 	if (view->child == NULL)
746 		return NULL;
747 
748 	err = view_close(view->child);
749 	view->child = NULL;
750 	return err;
751 }
752 
753 static void
754 view_set_child(struct tog_view *view, struct tog_view *child)
755 {
756 	view->child = child;
757 	child->parent = view;
758 }
759 
760 static int
761 view_is_splitscreen(struct tog_view *view)
762 {
763 	return view->begin_x > 0;
764 }
765 
766 static void
767 tog_resizeterm(void)
768 {
769 	int cols, lines;
770 	struct winsize size;
771 
772 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
773 		cols = 80;     /* Default */
774 		lines = 24;
775 	} else {
776 		cols = size.ws_col;
777 		lines = size.ws_row;
778 	}
779 	resize_term(lines, cols);
780 }
781 
782 static const struct got_error *
783 view_search_start(struct tog_view *view)
784 {
785 	const struct got_error *err = NULL;
786 	char pattern[1024];
787 	int ret;
788 
789 	if (view->search_started) {
790 		regfree(&view->regex);
791 		view->searching = 0;
792 		memset(&view->regmatch, 0, sizeof(view->regmatch));
793 	}
794 	view->search_started = 0;
795 
796 	if (view->nlines < 1)
797 		return NULL;
798 
799 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
800 	wclrtoeol(view->window);
801 
802 	nocbreak();
803 	echo();
804 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
805 	cbreak();
806 	noecho();
807 	if (ret == ERR)
808 		return NULL;
809 
810 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
811 		err = view->search_start(view);
812 		if (err) {
813 			regfree(&view->regex);
814 			return err;
815 		}
816 		view->search_started = 1;
817 		view->searching = TOG_SEARCH_FORWARD;
818 		view->search_next_done = 0;
819 		view->search_next(view);
820 	}
821 
822 	return NULL;
823 }
824 
825 static const struct got_error *
826 view_input(struct tog_view **new, int *done, struct tog_view *view,
827     struct tog_view_list_head *views)
828 {
829 	const struct got_error *err = NULL;
830 	struct tog_view *v;
831 	int ch, errcode;
832 
833 	*new = NULL;
834 
835 	/* Clear "no matches" indicator. */
836 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
837 	    view->search_next_done == TOG_SEARCH_HAVE_NONE)
838 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
839 
840 	if (view->searching && !view->search_next_done) {
841 		errcode = pthread_mutex_unlock(&tog_mutex);
842 		if (errcode)
843 			return got_error_set_errno(errcode,
844 			    "pthread_mutex_unlock");
845 		pthread_yield();
846 		errcode = pthread_mutex_lock(&tog_mutex);
847 		if (errcode)
848 			return got_error_set_errno(errcode,
849 			    "pthread_mutex_lock");
850 		view->search_next(view);
851 		return NULL;
852 	}
853 
854 	nodelay(stdscr, FALSE);
855 	/* Allow threads to make progress while we are waiting for input. */
856 	errcode = pthread_mutex_unlock(&tog_mutex);
857 	if (errcode)
858 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
859 	ch = wgetch(view->window);
860 	errcode = pthread_mutex_lock(&tog_mutex);
861 	if (errcode)
862 		return got_error_set_errno(errcode, "pthread_mutex_lock");
863 	nodelay(stdscr, TRUE);
864 
865 	if (tog_sigwinch_received || tog_sigcont_received) {
866 		tog_resizeterm();
867 		tog_sigwinch_received = 0;
868 		tog_sigcont_received = 0;
869 		TAILQ_FOREACH(v, views, entry) {
870 			err = view_resize(v);
871 			if (err)
872 				return err;
873 			err = v->input(new, v, KEY_RESIZE);
874 			if (err)
875 				return err;
876 			if (v->child) {
877 				err = view_resize(v->child);
878 				if (err)
879 					return err;
880 				err = v->child->input(new, v->child,
881 				    KEY_RESIZE);
882 				if (err)
883 					return err;
884 			}
885 		}
886 	}
887 
888 	switch (ch) {
889 	case ERR:
890 		break;
891 	case '\t':
892 		if (view->child) {
893 			view->focussed = 0;
894 			view->child->focussed = 1;
895 			view->focus_child = 1;
896 		} else if (view->parent) {
897 			view->focussed = 0;
898 			view->parent->focussed = 1;
899 			view->parent->focus_child = 0;
900 		}
901 		break;
902 	case 'q':
903 		err = view->input(new, view, ch);
904 		view->dying = 1;
905 		break;
906 	case 'Q':
907 		*done = 1;
908 		break;
909 	case 'f':
910 		if (view_is_parent_view(view)) {
911 			if (view->child == NULL)
912 				break;
913 			if (view_is_splitscreen(view->child)) {
914 				view->focussed = 0;
915 				view->child->focussed = 1;
916 				err = view_fullscreen(view->child);
917 			} else
918 				err = view_splitscreen(view->child);
919 			if (err)
920 				break;
921 			err = view->child->input(new, view->child,
922 			    KEY_RESIZE);
923 		} else {
924 			if (view_is_splitscreen(view)) {
925 				view->parent->focussed = 0;
926 				view->focussed = 1;
927 				err = view_fullscreen(view);
928 			} else {
929 				err = view_splitscreen(view);
930 			}
931 			if (err)
932 				break;
933 			err = view->input(new, view, KEY_RESIZE);
934 		}
935 		break;
936 	case KEY_RESIZE:
937 		break;
938 	case '/':
939 		if (view->search_start)
940 			view_search_start(view);
941 		else
942 			err = view->input(new, view, ch);
943 		break;
944 	case 'N':
945 	case 'n':
946 		if (view->search_started && view->search_next) {
947 			view->searching = (ch == 'n' ?
948 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
949 			view->search_next_done = 0;
950 			view->search_next(view);
951 		} else
952 			err = view->input(new, view, ch);
953 		break;
954 	default:
955 		err = view->input(new, view, ch);
956 		break;
957 	}
958 
959 	return err;
960 }
961 
962 void
963 view_vborder(struct tog_view *view)
964 {
965 	PANEL *panel;
966 	const struct tog_view *view_above;
967 
968 	if (view->parent)
969 		return view_vborder(view->parent);
970 
971 	panel = panel_above(view->panel);
972 	if (panel == NULL)
973 		return;
974 
975 	view_above = panel_userptr(panel);
976 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
977 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
978 }
979 
980 int
981 view_needs_focus_indication(struct tog_view *view)
982 {
983 	if (view_is_parent_view(view)) {
984 		if (view->child == NULL || view->child->focussed)
985 			return 0;
986 		if (!view_is_splitscreen(view->child))
987 			return 0;
988 	} else if (!view_is_splitscreen(view))
989 		return 0;
990 
991 	return view->focussed;
992 }
993 
994 static const struct got_error *
995 view_loop(struct tog_view *view)
996 {
997 	const struct got_error *err = NULL;
998 	struct tog_view_list_head views;
999 	struct tog_view *new_view;
1000 	int fast_refresh = 10;
1001 	int done = 0, errcode;
1002 
1003 	errcode = pthread_mutex_lock(&tog_mutex);
1004 	if (errcode)
1005 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1006 
1007 	TAILQ_INIT(&views);
1008 	TAILQ_INSERT_HEAD(&views, view, entry);
1009 
1010 	view->focussed = 1;
1011 	err = view->show(view);
1012 	if (err)
1013 		return err;
1014 	update_panels();
1015 	doupdate();
1016 	while (!TAILQ_EMPTY(&views) && !done && !tog_sigpipe_received) {
1017 		/* Refresh fast during initialization, then become slower. */
1018 		if (fast_refresh && fast_refresh-- == 0)
1019 			halfdelay(10); /* switch to once per second */
1020 
1021 		err = view_input(&new_view, &done, view, &views);
1022 		if (err)
1023 			break;
1024 		if (view->dying) {
1025 			struct tog_view *v, *prev = NULL;
1026 
1027 			if (view_is_parent_view(view))
1028 				prev = TAILQ_PREV(view, tog_view_list_head,
1029 				    entry);
1030 			else if (view->parent)
1031 				prev = view->parent;
1032 
1033 			if (view->parent) {
1034 				view->parent->child = NULL;
1035 				view->parent->focus_child = 0;
1036 			} else
1037 				TAILQ_REMOVE(&views, view, entry);
1038 
1039 			err = view_close(view);
1040 			if (err)
1041 				goto done;
1042 
1043 			view = NULL;
1044 			TAILQ_FOREACH(v, &views, entry) {
1045 				if (v->focussed)
1046 					break;
1047 			}
1048 			if (view == NULL && new_view == NULL) {
1049 				/* No view has focus. Try to pick one. */
1050 				if (prev)
1051 					view = prev;
1052 				else if (!TAILQ_EMPTY(&views)) {
1053 					view = TAILQ_LAST(&views,
1054 					    tog_view_list_head);
1055 				}
1056 				if (view) {
1057 					if (view->focus_child) {
1058 						view->child->focussed = 1;
1059 						view = view->child;
1060 					} else
1061 						view->focussed = 1;
1062 				}
1063 			}
1064 		}
1065 		if (new_view) {
1066 			struct tog_view *v, *t;
1067 			/* Only allow one parent view per type. */
1068 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1069 				if (v->type != new_view->type)
1070 					continue;
1071 				TAILQ_REMOVE(&views, v, entry);
1072 				err = view_close(v);
1073 				if (err)
1074 					goto done;
1075 				break;
1076 			}
1077 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1078 			view = new_view;
1079 		} 
1080 		if (view) {
1081 			if (view_is_parent_view(view)) {
1082 				if (view->child && view->child->focussed)
1083 					view = view->child;
1084 			} else {
1085 				if (view->parent && view->parent->focussed)
1086 					view = view->parent;
1087 			}
1088 			show_panel(view->panel);
1089 			if (view->child && view_is_splitscreen(view->child))
1090 				show_panel(view->child->panel);
1091 			if (view->parent && view_is_splitscreen(view)) {
1092 				err = view->parent->show(view->parent);
1093 				if (err)
1094 					goto done;
1095 			}
1096 			err = view->show(view);
1097 			if (err)
1098 				goto done;
1099 			if (view->child) {
1100 				err = view->child->show(view->child);
1101 				if (err)
1102 					goto done;
1103 			}
1104 			update_panels();
1105 			doupdate();
1106 		}
1107 	}
1108 done:
1109 	while (!TAILQ_EMPTY(&views)) {
1110 		view = TAILQ_FIRST(&views);
1111 		TAILQ_REMOVE(&views, view, entry);
1112 		view_close(view);
1113 	}
1114 
1115 	errcode = pthread_mutex_unlock(&tog_mutex);
1116 	if (errcode && err == NULL)
1117 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1118 
1119 	return err;
1120 }
1121 
1122 __dead static void
1123 usage_log(void)
1124 {
1125 	endwin();
1126 	fprintf(stderr,
1127 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1128 	    getprogname());
1129 	exit(1);
1130 }
1131 
1132 /* Create newly allocated wide-character string equivalent to a byte string. */
1133 static const struct got_error *
1134 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1135 {
1136 	char *vis = NULL;
1137 	const struct got_error *err = NULL;
1138 
1139 	*ws = NULL;
1140 	*wlen = mbstowcs(NULL, s, 0);
1141 	if (*wlen == (size_t)-1) {
1142 		int vislen;
1143 		if (errno != EILSEQ)
1144 			return got_error_from_errno("mbstowcs");
1145 
1146 		/* byte string invalid in current encoding; try to "fix" it */
1147 		err = got_mbsavis(&vis, &vislen, s);
1148 		if (err)
1149 			return err;
1150 		*wlen = mbstowcs(NULL, vis, 0);
1151 		if (*wlen == (size_t)-1) {
1152 			err = got_error_from_errno("mbstowcs"); /* give up */
1153 			goto done;
1154 		}
1155 	}
1156 
1157 	*ws = calloc(*wlen + 1, sizeof(**ws));
1158 	if (*ws == NULL) {
1159 		err = got_error_from_errno("calloc");
1160 		goto done;
1161 	}
1162 
1163 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1164 		err = got_error_from_errno("mbstowcs");
1165 done:
1166 	free(vis);
1167 	if (err) {
1168 		free(*ws);
1169 		*ws = NULL;
1170 		*wlen = 0;
1171 	}
1172 	return err;
1173 }
1174 
1175 /* Format a line for display, ensuring that it won't overflow a width limit. */
1176 static const struct got_error *
1177 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit,
1178     int col_tab_align)
1179 {
1180 	const struct got_error *err = NULL;
1181 	int cols = 0;
1182 	wchar_t *wline = NULL;
1183 	size_t wlen;
1184 	int i;
1185 
1186 	*wlinep = NULL;
1187 	*widthp = 0;
1188 
1189 	err = mbs2ws(&wline, &wlen, line);
1190 	if (err)
1191 		return err;
1192 
1193 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1194 		wline[wlen - 1] = L'\0';
1195 		wlen--;
1196 	}
1197 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1198 		wline[wlen - 1] = L'\0';
1199 		wlen--;
1200 	}
1201 
1202 	i = 0;
1203 	while (i < wlen) {
1204 		int width = wcwidth(wline[i]);
1205 
1206 		if (width == 0) {
1207 			i++;
1208 			continue;
1209 		}
1210 
1211 		if (width == 1 || width == 2) {
1212 			if (cols + width > wlimit)
1213 				break;
1214 			cols += width;
1215 			i++;
1216 		} else if (width == -1) {
1217 			if (wline[i] == L'\t') {
1218 				width = TABSIZE -
1219 				    ((cols + col_tab_align) % TABSIZE);
1220 			} else {
1221 				width = 1;
1222 				wline[i] = L'.';
1223 			}
1224 			if (cols + width > wlimit)
1225 				break;
1226 			cols += width;
1227 			i++;
1228 		} else {
1229 			err = got_error_from_errno("wcwidth");
1230 			goto done;
1231 		}
1232 	}
1233 	wline[i] = L'\0';
1234 	if (widthp)
1235 		*widthp = cols;
1236 done:
1237 	if (err)
1238 		free(wline);
1239 	else
1240 		*wlinep = wline;
1241 	return err;
1242 }
1243 
1244 static const struct got_error*
1245 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1246     struct got_object_id *id, struct got_repository *repo)
1247 {
1248 	static const struct got_error *err = NULL;
1249 	struct got_reflist_entry *re;
1250 	char *s;
1251 	const char *name;
1252 
1253 	*refs_str = NULL;
1254 
1255 	TAILQ_FOREACH(re, refs, entry) {
1256 		struct got_tag_object *tag = NULL;
1257 		struct got_object_id *ref_id;
1258 		int cmp;
1259 
1260 		name = got_ref_get_name(re->ref);
1261 		if (strcmp(name, GOT_REF_HEAD) == 0)
1262 			continue;
1263 		if (strncmp(name, "refs/", 5) == 0)
1264 			name += 5;
1265 		if (strncmp(name, "got/", 4) == 0)
1266 			continue;
1267 		if (strncmp(name, "heads/", 6) == 0)
1268 			name += 6;
1269 		if (strncmp(name, "remotes/", 8) == 0) {
1270 			name += 8;
1271 			s = strstr(name, "/" GOT_REF_HEAD);
1272 			if (s != NULL && s[strlen(s)] == '\0')
1273 				continue;
1274 		}
1275 		err = got_ref_resolve(&ref_id, repo, re->ref);
1276 		if (err)
1277 			break;
1278 		if (strncmp(name, "tags/", 5) == 0) {
1279 			err = got_object_open_as_tag(&tag, repo, ref_id);
1280 			if (err) {
1281 				if (err->code != GOT_ERR_OBJ_TYPE) {
1282 					free(ref_id);
1283 					break;
1284 				}
1285 				/* Ref points at something other than a tag. */
1286 				err = NULL;
1287 				tag = NULL;
1288 			}
1289 		}
1290 		cmp = got_object_id_cmp(tag ?
1291 		    got_object_tag_get_object_id(tag) : ref_id, id);
1292 		free(ref_id);
1293 		if (tag)
1294 			got_object_tag_close(tag);
1295 		if (cmp != 0)
1296 			continue;
1297 		s = *refs_str;
1298 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1299 		    s ? ", " : "", name) == -1) {
1300 			err = got_error_from_errno("asprintf");
1301 			free(s);
1302 			*refs_str = NULL;
1303 			break;
1304 		}
1305 		free(s);
1306 	}
1307 
1308 	return err;
1309 }
1310 
1311 static const struct got_error *
1312 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1313     int col_tab_align)
1314 {
1315 	char *smallerthan;
1316 
1317 	smallerthan = strchr(author, '<');
1318 	if (smallerthan && smallerthan[1] != '\0')
1319 		author = smallerthan + 1;
1320 	author[strcspn(author, "@>")] = '\0';
1321 	return format_line(wauthor, author_width, author, limit, col_tab_align);
1322 }
1323 
1324 static const struct got_error *
1325 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1326     struct got_object_id *id, const size_t date_display_cols,
1327     int author_display_cols)
1328 {
1329 	struct tog_log_view_state *s = &view->state.log;
1330 	const struct got_error *err = NULL;
1331 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1332 	char *logmsg0 = NULL, *logmsg = NULL;
1333 	char *author = NULL;
1334 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1335 	int author_width, logmsg_width;
1336 	char *newline, *line = NULL;
1337 	int col, limit;
1338 	const int avail = view->ncols;
1339 	struct tm tm;
1340 	time_t committer_time;
1341 	struct tog_color *tc;
1342 
1343 	committer_time = got_object_commit_get_committer_time(commit);
1344 	if (localtime_r(&committer_time, &tm) == NULL)
1345 		return got_error_from_errno("localtime_r");
1346 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1347 		return got_error(GOT_ERR_NO_SPACE);
1348 
1349 	if (avail <= date_display_cols)
1350 		limit = MIN(sizeof(datebuf) - 1, avail);
1351 	else
1352 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1353 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1354 	if (tc)
1355 		wattr_on(view->window,
1356 		    COLOR_PAIR(tc->colorpair), NULL);
1357 	waddnstr(view->window, datebuf, limit);
1358 	if (tc)
1359 		wattr_off(view->window,
1360 		    COLOR_PAIR(tc->colorpair), NULL);
1361 	col = limit;
1362 	if (col > avail)
1363 		goto done;
1364 
1365 	if (avail >= 120) {
1366 		char *id_str;
1367 		err = got_object_id_str(&id_str, id);
1368 		if (err)
1369 			goto done;
1370 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1371 		if (tc)
1372 			wattr_on(view->window,
1373 			    COLOR_PAIR(tc->colorpair), NULL);
1374 		wprintw(view->window, "%.8s ", id_str);
1375 		if (tc)
1376 			wattr_off(view->window,
1377 			    COLOR_PAIR(tc->colorpair), NULL);
1378 		free(id_str);
1379 		col += 9;
1380 		if (col > avail)
1381 			goto done;
1382 	}
1383 
1384 	author = strdup(got_object_commit_get_author(commit));
1385 	if (author == NULL) {
1386 		err = got_error_from_errno("strdup");
1387 		goto done;
1388 	}
1389 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1390 	if (err)
1391 		goto done;
1392 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1393 	if (tc)
1394 		wattr_on(view->window,
1395 		    COLOR_PAIR(tc->colorpair), NULL);
1396 	waddwstr(view->window, wauthor);
1397 	if (tc)
1398 		wattr_off(view->window,
1399 		    COLOR_PAIR(tc->colorpair), NULL);
1400 	col += author_width;
1401 	while (col < avail && author_width < author_display_cols + 2) {
1402 		waddch(view->window, ' ');
1403 		col++;
1404 		author_width++;
1405 	}
1406 	if (col > avail)
1407 		goto done;
1408 
1409 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1410 	if (err)
1411 		goto done;
1412 	logmsg = logmsg0;
1413 	while (*logmsg == '\n')
1414 		logmsg++;
1415 	newline = strchr(logmsg, '\n');
1416 	if (newline)
1417 		*newline = '\0';
1418 	limit = avail - col;
1419 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit, col);
1420 	if (err)
1421 		goto done;
1422 	waddwstr(view->window, wlogmsg);
1423 	col += logmsg_width;
1424 	while (col < avail) {
1425 		waddch(view->window, ' ');
1426 		col++;
1427 	}
1428 done:
1429 	free(logmsg0);
1430 	free(wlogmsg);
1431 	free(author);
1432 	free(wauthor);
1433 	free(line);
1434 	return err;
1435 }
1436 
1437 static struct commit_queue_entry *
1438 alloc_commit_queue_entry(struct got_commit_object *commit,
1439     struct got_object_id *id)
1440 {
1441 	struct commit_queue_entry *entry;
1442 
1443 	entry = calloc(1, sizeof(*entry));
1444 	if (entry == NULL)
1445 		return NULL;
1446 
1447 	entry->id = id;
1448 	entry->commit = commit;
1449 	return entry;
1450 }
1451 
1452 static void
1453 pop_commit(struct commit_queue *commits)
1454 {
1455 	struct commit_queue_entry *entry;
1456 
1457 	entry = TAILQ_FIRST(&commits->head);
1458 	TAILQ_REMOVE(&commits->head, entry, entry);
1459 	got_object_commit_close(entry->commit);
1460 	commits->ncommits--;
1461 	/* Don't free entry->id! It is owned by the commit graph. */
1462 	free(entry);
1463 }
1464 
1465 static void
1466 free_commits(struct commit_queue *commits)
1467 {
1468 	while (!TAILQ_EMPTY(&commits->head))
1469 		pop_commit(commits);
1470 }
1471 
1472 static const struct got_error *
1473 match_commit(int *have_match, struct got_object_id *id,
1474     struct got_commit_object *commit, regex_t *regex)
1475 {
1476 	const struct got_error *err = NULL;
1477 	regmatch_t regmatch;
1478 	char *id_str = NULL, *logmsg = NULL;
1479 
1480 	*have_match = 0;
1481 
1482 	err = got_object_id_str(&id_str, id);
1483 	if (err)
1484 		return err;
1485 
1486 	err = got_object_commit_get_logmsg(&logmsg, commit);
1487 	if (err)
1488 		goto done;
1489 
1490 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1491 	    &regmatch, 0) == 0 ||
1492 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1493 	    &regmatch, 0) == 0 ||
1494 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1495 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1496 		*have_match = 1;
1497 done:
1498 	free(id_str);
1499 	free(logmsg);
1500 	return err;
1501 }
1502 
1503 static const struct got_error *
1504 queue_commits(struct tog_log_thread_args *a)
1505 {
1506 	const struct got_error *err = NULL;
1507 
1508 	/*
1509 	 * We keep all commits open throughout the lifetime of the log
1510 	 * view in order to avoid having to re-fetch commits from disk
1511 	 * while updating the display.
1512 	 */
1513 	do {
1514 		struct got_object_id *id;
1515 		struct got_commit_object *commit;
1516 		struct commit_queue_entry *entry;
1517 		int errcode;
1518 
1519 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1520 		    NULL, NULL);
1521 		if (err || id == NULL)
1522 			break;
1523 
1524 		err = got_object_open_as_commit(&commit, a->repo, id);
1525 		if (err)
1526 			break;
1527 		entry = alloc_commit_queue_entry(commit, id);
1528 		if (entry == NULL) {
1529 			err = got_error_from_errno("alloc_commit_queue_entry");
1530 			break;
1531 		}
1532 
1533 		errcode = pthread_mutex_lock(&tog_mutex);
1534 		if (errcode) {
1535 			err = got_error_set_errno(errcode,
1536 			    "pthread_mutex_lock");
1537 			break;
1538 		}
1539 
1540 		entry->idx = a->commits->ncommits;
1541 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1542 		a->commits->ncommits++;
1543 
1544 		if (*a->searching == TOG_SEARCH_FORWARD &&
1545 		    !*a->search_next_done) {
1546 			int have_match;
1547 			err = match_commit(&have_match, id, commit, a->regex);
1548 			if (err)
1549 				break;
1550 			if (have_match)
1551 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1552 		}
1553 
1554 		errcode = pthread_mutex_unlock(&tog_mutex);
1555 		if (errcode && err == NULL)
1556 			err = got_error_set_errno(errcode,
1557 			    "pthread_mutex_unlock");
1558 		if (err)
1559 			break;
1560 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1561 
1562 	return err;
1563 }
1564 
1565 static void
1566 select_commit(struct tog_log_view_state *s)
1567 {
1568 	struct commit_queue_entry *entry;
1569 	int ncommits = 0;
1570 
1571 	entry = s->first_displayed_entry;
1572 	while (entry) {
1573 		if (ncommits == s->selected) {
1574 			s->selected_entry = entry;
1575 			break;
1576 		}
1577 		entry = TAILQ_NEXT(entry, entry);
1578 		ncommits++;
1579 	}
1580 }
1581 
1582 static const struct got_error *
1583 draw_commits(struct tog_view *view)
1584 {
1585 	const struct got_error *err = NULL;
1586 	struct tog_log_view_state *s = &view->state.log;
1587 	struct commit_queue_entry *entry = s->selected_entry;
1588 	const int limit = view->nlines;
1589 	int width;
1590 	int ncommits, author_cols = 4;
1591 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1592 	char *refs_str = NULL;
1593 	wchar_t *wline;
1594 	struct tog_color *tc;
1595 	static const size_t date_display_cols = 12;
1596 
1597 	if (s->selected_entry &&
1598 	    !(view->searching && view->search_next_done == 0)) {
1599 		struct got_reflist_head *refs;
1600 		err = got_object_id_str(&id_str, s->selected_entry->id);
1601 		if (err)
1602 			return err;
1603 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1604 		    s->selected_entry->id);
1605 		if (refs) {
1606 			err = build_refs_str(&refs_str, refs,
1607 			    s->selected_entry->id, s->repo);
1608 			if (err)
1609 				goto done;
1610 		}
1611 	}
1612 
1613 	if (s->thread_args.commits_needed == 0)
1614 		halfdelay(10); /* disable fast refresh */
1615 
1616 	if (s->thread_args.commits_needed > 0) {
1617 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1618 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1619 		    (view->searching && !view->search_next_done) ?
1620 		    "searching..." : "loading...") == -1) {
1621 			err = got_error_from_errno("asprintf");
1622 			goto done;
1623 		}
1624 	} else {
1625 		const char *search_str = NULL;
1626 
1627 		if (view->searching) {
1628 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1629 				search_str = "no more matches";
1630 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1631 				search_str = "no matches found";
1632 			else if (!view->search_next_done)
1633 				search_str = "searching...";
1634 		}
1635 
1636 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1637 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1638 		    search_str ? search_str :
1639 		    (refs_str ? refs_str : "")) == -1) {
1640 			err = got_error_from_errno("asprintf");
1641 			goto done;
1642 		}
1643 	}
1644 
1645 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1646 		if (asprintf(&header, "commit %s %s%s",
1647 		    id_str ? id_str : "........................................",
1648 		    s->in_repo_path, ncommits_str) == -1) {
1649 			err = got_error_from_errno("asprintf");
1650 			header = NULL;
1651 			goto done;
1652 		}
1653 	} else if (asprintf(&header, "commit %s%s",
1654 	    id_str ? id_str : "........................................",
1655 	    ncommits_str) == -1) {
1656 		err = got_error_from_errno("asprintf");
1657 		header = NULL;
1658 		goto done;
1659 	}
1660 	err = format_line(&wline, &width, header, view->ncols, 0);
1661 	if (err)
1662 		goto done;
1663 
1664 	werase(view->window);
1665 
1666 	if (view_needs_focus_indication(view))
1667 		wstandout(view->window);
1668 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1669 	if (tc)
1670 		wattr_on(view->window,
1671 		    COLOR_PAIR(tc->colorpair), NULL);
1672 	waddwstr(view->window, wline);
1673 	if (tc)
1674 		wattr_off(view->window,
1675 		    COLOR_PAIR(tc->colorpair), NULL);
1676 	while (width < view->ncols) {
1677 		waddch(view->window, ' ');
1678 		width++;
1679 	}
1680 	if (view_needs_focus_indication(view))
1681 		wstandend(view->window);
1682 	free(wline);
1683 	if (limit <= 1)
1684 		goto done;
1685 
1686 	/* Grow author column size if necessary. */
1687 	entry = s->first_displayed_entry;
1688 	ncommits = 0;
1689 	while (entry) {
1690 		char *author;
1691 		wchar_t *wauthor;
1692 		int width;
1693 		if (ncommits >= limit - 1)
1694 			break;
1695 		author = strdup(got_object_commit_get_author(entry->commit));
1696 		if (author == NULL) {
1697 			err = got_error_from_errno("strdup");
1698 			goto done;
1699 		}
1700 		err = format_author(&wauthor, &width, author, COLS,
1701 		    date_display_cols);
1702 		if (author_cols < width)
1703 			author_cols = width;
1704 		free(wauthor);
1705 		free(author);
1706 		ncommits++;
1707 		entry = TAILQ_NEXT(entry, entry);
1708 	}
1709 
1710 	entry = s->first_displayed_entry;
1711 	s->last_displayed_entry = s->first_displayed_entry;
1712 	ncommits = 0;
1713 	while (entry) {
1714 		if (ncommits >= limit - 1)
1715 			break;
1716 		if (ncommits == s->selected)
1717 			wstandout(view->window);
1718 		err = draw_commit(view, entry->commit, entry->id,
1719 		    date_display_cols, author_cols);
1720 		if (ncommits == s->selected)
1721 			wstandend(view->window);
1722 		if (err)
1723 			goto done;
1724 		ncommits++;
1725 		s->last_displayed_entry = entry;
1726 		entry = TAILQ_NEXT(entry, entry);
1727 	}
1728 
1729 	view_vborder(view);
1730 done:
1731 	free(id_str);
1732 	free(refs_str);
1733 	free(ncommits_str);
1734 	free(header);
1735 	return err;
1736 }
1737 
1738 static void
1739 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1740 {
1741 	struct commit_queue_entry *entry;
1742 	int nscrolled = 0;
1743 
1744 	entry = TAILQ_FIRST(&s->commits.head);
1745 	if (s->first_displayed_entry == entry)
1746 		return;
1747 
1748 	entry = s->first_displayed_entry;
1749 	while (entry && nscrolled < maxscroll) {
1750 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1751 		if (entry) {
1752 			s->first_displayed_entry = entry;
1753 			nscrolled++;
1754 		}
1755 	}
1756 }
1757 
1758 static const struct got_error *
1759 trigger_log_thread(struct tog_view *view, int wait)
1760 {
1761 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1762 	int errcode;
1763 
1764 	halfdelay(1); /* fast refresh while loading commits */
1765 
1766 	while (ta->commits_needed > 0) {
1767 		if (ta->log_complete)
1768 			break;
1769 
1770 		/* Wake the log thread. */
1771 		errcode = pthread_cond_signal(&ta->need_commits);
1772 		if (errcode)
1773 			return got_error_set_errno(errcode,
1774 			    "pthread_cond_signal");
1775 
1776 		/*
1777 		 * The mutex will be released while the view loop waits
1778 		 * in wgetch(), at which time the log thread will run.
1779 		 */
1780 		if (!wait)
1781 			break;
1782 
1783 		/* Display progress update in log view. */
1784 		show_log_view(view);
1785 		update_panels();
1786 		doupdate();
1787 
1788 		/* Wait right here while next commit is being loaded. */
1789 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1790 		if (errcode)
1791 			return got_error_set_errno(errcode,
1792 			    "pthread_cond_wait");
1793 
1794 		/* Display progress update in log view. */
1795 		show_log_view(view);
1796 		update_panels();
1797 		doupdate();
1798 	}
1799 
1800 	return NULL;
1801 }
1802 
1803 static const struct got_error *
1804 log_scroll_down(struct tog_view *view, int maxscroll)
1805 {
1806 	struct tog_log_view_state *s = &view->state.log;
1807 	const struct got_error *err = NULL;
1808 	struct commit_queue_entry *pentry;
1809 	int nscrolled = 0, ncommits_needed;
1810 
1811 	if (s->last_displayed_entry == NULL)
1812 		return NULL;
1813 
1814 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
1815 	if (s->commits.ncommits < ncommits_needed &&
1816 	    !s->thread_args.log_complete) {
1817 		/*
1818 		 * Ask the log thread for required amount of commits.
1819 		 */
1820 		s->thread_args.commits_needed += maxscroll;
1821 		err = trigger_log_thread(view, 1);
1822 		if (err)
1823 			return err;
1824 	}
1825 
1826 	do {
1827 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1828 		if (pentry == NULL)
1829 			break;
1830 
1831 		s->last_displayed_entry = pentry;
1832 
1833 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1834 		if (pentry == NULL)
1835 			break;
1836 		s->first_displayed_entry = pentry;
1837 	} while (++nscrolled < maxscroll);
1838 
1839 	return err;
1840 }
1841 
1842 static const struct got_error *
1843 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1844     struct got_commit_object *commit, struct got_object_id *commit_id,
1845     struct tog_view *log_view, struct got_repository *repo)
1846 {
1847 	const struct got_error *err;
1848 	struct got_object_qid *parent_id;
1849 	struct tog_view *diff_view;
1850 
1851 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1852 	if (diff_view == NULL)
1853 		return got_error_from_errno("view_open");
1854 
1855 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1856 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1857 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
1858 	if (err == NULL)
1859 		*new_view = diff_view;
1860 	return err;
1861 }
1862 
1863 static const struct got_error *
1864 tree_view_visit_subtree(struct tog_tree_view_state *s,
1865     struct got_tree_object *subtree)
1866 {
1867 	struct tog_parent_tree *parent;
1868 
1869 	parent = calloc(1, sizeof(*parent));
1870 	if (parent == NULL)
1871 		return got_error_from_errno("calloc");
1872 
1873 	parent->tree = s->tree;
1874 	parent->first_displayed_entry = s->first_displayed_entry;
1875 	parent->selected_entry = s->selected_entry;
1876 	parent->selected = s->selected;
1877 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1878 	s->tree = subtree;
1879 	s->selected = 0;
1880 	s->first_displayed_entry = NULL;
1881 	return NULL;
1882 }
1883 
1884 static const struct got_error *
1885 tree_view_walk_path(struct tog_tree_view_state *s,
1886     struct got_object_id *commit_id, const char *path)
1887 {
1888 	const struct got_error *err = NULL;
1889 	struct got_tree_object *tree = NULL;
1890 	const char *p;
1891 	char *slash, *subpath = NULL;
1892 
1893 	/* Walk the path and open corresponding tree objects. */
1894 	p = path;
1895 	while (*p) {
1896 		struct got_tree_entry *te;
1897 		struct got_object_id *tree_id;
1898 		char *te_name;
1899 
1900 		while (p[0] == '/')
1901 			p++;
1902 
1903 		/* Ensure the correct subtree entry is selected. */
1904 		slash = strchr(p, '/');
1905 		if (slash == NULL)
1906 			te_name = strdup(p);
1907 		else
1908 			te_name = strndup(p, slash - p);
1909 		if (te_name == NULL) {
1910 			err = got_error_from_errno("strndup");
1911 			break;
1912 		}
1913 		te = got_object_tree_find_entry(s->tree, te_name);
1914 		if (te == NULL) {
1915 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
1916 			free(te_name);
1917 			break;
1918 		}
1919 		free(te_name);
1920 		s->first_displayed_entry = s->selected_entry = te;
1921 
1922 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
1923 			break; /* jump to this file's entry */
1924 
1925 		slash = strchr(p, '/');
1926 		if (slash)
1927 			subpath = strndup(path, slash - path);
1928 		else
1929 			subpath = strdup(path);
1930 		if (subpath == NULL) {
1931 			err = got_error_from_errno("strdup");
1932 			break;
1933 		}
1934 
1935 		err = got_object_id_by_path(&tree_id, s->repo, commit_id,
1936 		    subpath);
1937 		if (err)
1938 			break;
1939 
1940 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
1941 		free(tree_id);
1942 		if (err)
1943 			break;
1944 
1945 		err = tree_view_visit_subtree(s, tree);
1946 		if (err) {
1947 			got_object_tree_close(tree);
1948 			break;
1949 		}
1950 		if (slash == NULL)
1951 			break;
1952 		free(subpath);
1953 		subpath = NULL;
1954 		p = slash;
1955 	}
1956 
1957 	free(subpath);
1958 	return err;
1959 }
1960 
1961 static const struct got_error *
1962 browse_commit_tree(struct tog_view **new_view, int begin_x,
1963     struct commit_queue_entry *entry, const char *path,
1964     const char *head_ref_name, struct got_repository *repo)
1965 {
1966 	const struct got_error *err = NULL;
1967 	struct got_tree_object *tree;
1968 	struct tog_tree_view_state *s;
1969 	struct tog_view *tree_view;
1970 
1971 	err = got_object_open_as_tree(&tree, repo,
1972 	    got_object_commit_get_tree_id(entry->commit));
1973 	if (err)
1974 		return err;
1975 
1976 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1977 	if (tree_view == NULL)
1978 		return got_error_from_errno("view_open");
1979 
1980 	err = open_tree_view(tree_view, tree, entry->id, head_ref_name, repo);
1981 	if (err) {
1982 		got_object_tree_close(tree);
1983 		return err;
1984 	}
1985 	s = &tree_view->state.tree;
1986 
1987 	*new_view = tree_view;
1988 
1989 	if (got_path_is_root_dir(path))
1990 		return NULL;
1991 
1992 	return tree_view_walk_path(s, entry->id, path);
1993 }
1994 
1995 static const struct got_error *
1996 block_signals_used_by_main_thread(void)
1997 {
1998 	sigset_t sigset;
1999 	int errcode;
2000 
2001 	if (sigemptyset(&sigset) == -1)
2002 		return got_error_from_errno("sigemptyset");
2003 
2004 	/* tog handles SIGWINCH and SIGCONT */
2005 	if (sigaddset(&sigset, SIGWINCH) == -1)
2006 		return got_error_from_errno("sigaddset");
2007 	if (sigaddset(&sigset, SIGCONT) == -1)
2008 		return got_error_from_errno("sigaddset");
2009 
2010 	/* ncurses handles SIGTSTP */
2011 	if (sigaddset(&sigset, SIGTSTP) == -1)
2012 		return got_error_from_errno("sigaddset");
2013 
2014 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2015 	if (errcode)
2016 		return got_error_set_errno(errcode, "pthread_sigmask");
2017 
2018 	return NULL;
2019 }
2020 
2021 static void *
2022 log_thread(void *arg)
2023 {
2024 	const struct got_error *err = NULL;
2025 	int errcode = 0;
2026 	struct tog_log_thread_args *a = arg;
2027 	int done = 0;
2028 
2029 	err = block_signals_used_by_main_thread();
2030 	if (err)
2031 		return (void *)err;
2032 
2033 	while (!done && !err && !tog_sigpipe_received) {
2034 		err = queue_commits(a);
2035 		if (err) {
2036 			if (err->code != GOT_ERR_ITER_COMPLETED)
2037 				return (void *)err;
2038 			err = NULL;
2039 			done = 1;
2040 		} else if (a->commits_needed > 0)
2041 			a->commits_needed--;
2042 
2043 		errcode = pthread_mutex_lock(&tog_mutex);
2044 		if (errcode) {
2045 			err = got_error_set_errno(errcode,
2046 			    "pthread_mutex_lock");
2047 			break;
2048 		} else if (*a->quit)
2049 			done = 1;
2050 		else if (*a->first_displayed_entry == NULL) {
2051 			*a->first_displayed_entry =
2052 			    TAILQ_FIRST(&a->commits->head);
2053 			*a->selected_entry = *a->first_displayed_entry;
2054 		}
2055 
2056 		errcode = pthread_cond_signal(&a->commit_loaded);
2057 		if (errcode) {
2058 			err = got_error_set_errno(errcode,
2059 			    "pthread_cond_signal");
2060 			pthread_mutex_unlock(&tog_mutex);
2061 			break;
2062 		}
2063 
2064 		if (done)
2065 			a->commits_needed = 0;
2066 		else {
2067 			if (a->commits_needed == 0) {
2068 				errcode = pthread_cond_wait(&a->need_commits,
2069 				    &tog_mutex);
2070 				if (errcode)
2071 					err = got_error_set_errno(errcode,
2072 					    "pthread_cond_wait");
2073 				if (*a->quit)
2074 					done = 1;
2075 			}
2076 		}
2077 
2078 		errcode = pthread_mutex_unlock(&tog_mutex);
2079 		if (errcode && err == NULL)
2080 			err = got_error_set_errno(errcode,
2081 			    "pthread_mutex_unlock");
2082 	}
2083 	a->log_complete = 1;
2084 	return (void *)err;
2085 }
2086 
2087 static const struct got_error *
2088 stop_log_thread(struct tog_log_view_state *s)
2089 {
2090 	const struct got_error *err = NULL;
2091 	int errcode;
2092 
2093 	if (s->thread) {
2094 		s->quit = 1;
2095 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2096 		if (errcode)
2097 			return got_error_set_errno(errcode,
2098 			    "pthread_cond_signal");
2099 		errcode = pthread_mutex_unlock(&tog_mutex);
2100 		if (errcode)
2101 			return got_error_set_errno(errcode,
2102 			    "pthread_mutex_unlock");
2103 		errcode = pthread_join(s->thread, (void **)&err);
2104 		if (errcode)
2105 			return got_error_set_errno(errcode, "pthread_join");
2106 		errcode = pthread_mutex_lock(&tog_mutex);
2107 		if (errcode)
2108 			return got_error_set_errno(errcode,
2109 			    "pthread_mutex_lock");
2110 		s->thread = NULL;
2111 	}
2112 
2113 	if (s->thread_args.repo) {
2114 		got_repo_close(s->thread_args.repo);
2115 		s->thread_args.repo = NULL;
2116 	}
2117 
2118 	if (s->thread_args.graph) {
2119 		got_commit_graph_close(s->thread_args.graph);
2120 		s->thread_args.graph = NULL;
2121 	}
2122 
2123 	return err;
2124 }
2125 
2126 static const struct got_error *
2127 close_log_view(struct tog_view *view)
2128 {
2129 	const struct got_error *err = NULL;
2130 	struct tog_log_view_state *s = &view->state.log;
2131 	int errcode;
2132 
2133 	err = stop_log_thread(s);
2134 
2135 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2136 	if (errcode && err == NULL)
2137 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2138 
2139 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2140 	if (errcode && err == NULL)
2141 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2142 
2143 	free_commits(&s->commits);
2144 	free(s->in_repo_path);
2145 	s->in_repo_path = NULL;
2146 	free(s->start_id);
2147 	s->start_id = NULL;
2148 	free(s->head_ref_name);
2149 	s->head_ref_name = NULL;
2150 	return err;
2151 }
2152 
2153 static const struct got_error *
2154 search_start_log_view(struct tog_view *view)
2155 {
2156 	struct tog_log_view_state *s = &view->state.log;
2157 
2158 	s->matched_entry = NULL;
2159 	s->search_entry = NULL;
2160 	return NULL;
2161 }
2162 
2163 static const struct got_error *
2164 search_next_log_view(struct tog_view *view)
2165 {
2166 	const struct got_error *err = NULL;
2167 	struct tog_log_view_state *s = &view->state.log;
2168 	struct commit_queue_entry *entry;
2169 
2170 	/* Display progress update in log view. */
2171 	show_log_view(view);
2172 	update_panels();
2173 	doupdate();
2174 
2175 	if (s->search_entry) {
2176 		int errcode, ch;
2177 		errcode = pthread_mutex_unlock(&tog_mutex);
2178 		if (errcode)
2179 			return got_error_set_errno(errcode,
2180 			    "pthread_mutex_unlock");
2181 		ch = wgetch(view->window);
2182 		errcode = pthread_mutex_lock(&tog_mutex);
2183 		if (errcode)
2184 			return got_error_set_errno(errcode,
2185 			    "pthread_mutex_lock");
2186 		if (ch == KEY_BACKSPACE) {
2187 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2188 			return NULL;
2189 		}
2190 		if (view->searching == TOG_SEARCH_FORWARD)
2191 			entry = TAILQ_NEXT(s->search_entry, entry);
2192 		else
2193 			entry = TAILQ_PREV(s->search_entry,
2194 			    commit_queue_head, entry);
2195 	} else if (s->matched_entry) {
2196 		if (view->searching == TOG_SEARCH_FORWARD)
2197 			entry = TAILQ_NEXT(s->matched_entry, entry);
2198 		else
2199 			entry = TAILQ_PREV(s->matched_entry,
2200 			    commit_queue_head, entry);
2201 	} else {
2202 		if (view->searching == TOG_SEARCH_FORWARD)
2203 			entry = TAILQ_FIRST(&s->commits.head);
2204 		else
2205 			entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2206 	}
2207 
2208 	while (1) {
2209 		int have_match = 0;
2210 
2211 		if (entry == NULL) {
2212 			if (s->thread_args.log_complete ||
2213 			    view->searching == TOG_SEARCH_BACKWARD) {
2214 				view->search_next_done =
2215 				    (s->matched_entry == NULL ?
2216 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2217 				s->search_entry = NULL;
2218 				return NULL;
2219 			}
2220 			/*
2221 			 * Poke the log thread for more commits and return,
2222 			 * allowing the main loop to make progress. Search
2223 			 * will resume at s->search_entry once we come back.
2224 			 */
2225 			s->thread_args.commits_needed++;
2226 			return trigger_log_thread(view, 0);
2227 		}
2228 
2229 		err = match_commit(&have_match, entry->id, entry->commit,
2230 		    &view->regex);
2231 		if (err)
2232 			break;
2233 		if (have_match) {
2234 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2235 			s->matched_entry = entry;
2236 			break;
2237 		}
2238 
2239 		s->search_entry = entry;
2240 		if (view->searching == TOG_SEARCH_FORWARD)
2241 			entry = TAILQ_NEXT(entry, entry);
2242 		else
2243 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2244 	}
2245 
2246 	if (s->matched_entry) {
2247 		int cur = s->selected_entry->idx;
2248 		while (cur < s->matched_entry->idx) {
2249 			err = input_log_view(NULL, view, KEY_DOWN);
2250 			if (err)
2251 				return err;
2252 			cur++;
2253 		}
2254 		while (cur > s->matched_entry->idx) {
2255 			err = input_log_view(NULL, view, KEY_UP);
2256 			if (err)
2257 				return err;
2258 			cur--;
2259 		}
2260 	}
2261 
2262 	s->search_entry = NULL;
2263 
2264 	return NULL;
2265 }
2266 
2267 static const struct got_error *
2268 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2269     struct got_repository *repo, const char *head_ref_name,
2270     const char *in_repo_path, int log_branches)
2271 {
2272 	const struct got_error *err = NULL;
2273 	struct tog_log_view_state *s = &view->state.log;
2274 	struct got_repository *thread_repo = NULL;
2275 	struct got_commit_graph *thread_graph = NULL;
2276 	int errcode;
2277 
2278 	if (in_repo_path != s->in_repo_path) {
2279 		free(s->in_repo_path);
2280 		s->in_repo_path = strdup(in_repo_path);
2281 		if (s->in_repo_path == NULL)
2282 			return got_error_from_errno("strdup");
2283 	}
2284 
2285 	/* The commit queue only contains commits being displayed. */
2286 	TAILQ_INIT(&s->commits.head);
2287 	s->commits.ncommits = 0;
2288 
2289 	s->repo = repo;
2290 	if (head_ref_name) {
2291 		s->head_ref_name = strdup(head_ref_name);
2292 		if (s->head_ref_name == NULL) {
2293 			err = got_error_from_errno("strdup");
2294 			goto done;
2295 		}
2296 	}
2297 	s->start_id = got_object_id_dup(start_id);
2298 	if (s->start_id == NULL) {
2299 		err = got_error_from_errno("got_object_id_dup");
2300 		goto done;
2301 	}
2302 	s->log_branches = log_branches;
2303 
2304 	SIMPLEQ_INIT(&s->colors);
2305 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2306 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2307 		    get_color_value("TOG_COLOR_COMMIT"));
2308 		if (err)
2309 			goto done;
2310 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2311 		    get_color_value("TOG_COLOR_AUTHOR"));
2312 		if (err) {
2313 			free_colors(&s->colors);
2314 			goto done;
2315 		}
2316 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2317 		    get_color_value("TOG_COLOR_DATE"));
2318 		if (err) {
2319 			free_colors(&s->colors);
2320 			goto done;
2321 		}
2322 	}
2323 
2324 	view->show = show_log_view;
2325 	view->input = input_log_view;
2326 	view->close = close_log_view;
2327 	view->search_start = search_start_log_view;
2328 	view->search_next = search_next_log_view;
2329 
2330 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL);
2331 	if (err)
2332 		goto done;
2333 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2334 	    !s->log_branches);
2335 	if (err)
2336 		goto done;
2337 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2338 	    s->repo, NULL, NULL);
2339 	if (err)
2340 		goto done;
2341 
2342 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2343 	if (errcode) {
2344 		err = got_error_set_errno(errcode, "pthread_cond_init");
2345 		goto done;
2346 	}
2347 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2348 	if (errcode) {
2349 		err = got_error_set_errno(errcode, "pthread_cond_init");
2350 		goto done;
2351 	}
2352 
2353 	s->thread_args.commits_needed = view->nlines;
2354 	s->thread_args.graph = thread_graph;
2355 	s->thread_args.commits = &s->commits;
2356 	s->thread_args.in_repo_path = s->in_repo_path;
2357 	s->thread_args.start_id = s->start_id;
2358 	s->thread_args.repo = thread_repo;
2359 	s->thread_args.log_complete = 0;
2360 	s->thread_args.quit = &s->quit;
2361 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2362 	s->thread_args.selected_entry = &s->selected_entry;
2363 	s->thread_args.searching = &view->searching;
2364 	s->thread_args.search_next_done = &view->search_next_done;
2365 	s->thread_args.regex = &view->regex;
2366 done:
2367 	if (err)
2368 		close_log_view(view);
2369 	return err;
2370 }
2371 
2372 static const struct got_error *
2373 show_log_view(struct tog_view *view)
2374 {
2375 	const struct got_error *err;
2376 	struct tog_log_view_state *s = &view->state.log;
2377 
2378 	if (s->thread == NULL) {
2379 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2380 		    &s->thread_args);
2381 		if (errcode)
2382 			return got_error_set_errno(errcode, "pthread_create");
2383 		if (s->thread_args.commits_needed > 0) {
2384 			err = trigger_log_thread(view, 1);
2385 			if (err)
2386 				return err;
2387 		}
2388 	}
2389 
2390 	return draw_commits(view);
2391 }
2392 
2393 static const struct got_error *
2394 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2395 {
2396 	const struct got_error *err = NULL;
2397 	struct tog_log_view_state *s = &view->state.log;
2398 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2399 	struct tog_view *ref_view = NULL;
2400 	int begin_x = 0;
2401 
2402 	switch (ch) {
2403 	case 'q':
2404 		s->quit = 1;
2405 		break;
2406 	case 'k':
2407 	case KEY_UP:
2408 	case '<':
2409 	case ',':
2410 		if (s->first_displayed_entry == NULL)
2411 			break;
2412 		if (s->selected > 0)
2413 			s->selected--;
2414 		else
2415 			log_scroll_up(s, 1);
2416 		select_commit(s);
2417 		break;
2418 	case KEY_PPAGE:
2419 	case CTRL('b'):
2420 		if (s->first_displayed_entry == NULL)
2421 			break;
2422 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2423 			s->selected = 0;
2424 		else
2425 			log_scroll_up(s, view->nlines - 1);
2426 		select_commit(s);
2427 		break;
2428 	case 'j':
2429 	case KEY_DOWN:
2430 	case '>':
2431 	case '.':
2432 		if (s->first_displayed_entry == NULL)
2433 			break;
2434 		if (s->selected < MIN(view->nlines - 2,
2435 		    s->commits.ncommits - 1))
2436 			s->selected++;
2437 		else {
2438 			err = log_scroll_down(view, 1);
2439 			if (err)
2440 				break;
2441 		}
2442 		select_commit(s);
2443 		break;
2444 	case KEY_NPAGE:
2445 	case CTRL('f'): {
2446 		struct commit_queue_entry *first;
2447 		first = s->first_displayed_entry;
2448 		if (first == NULL)
2449 			break;
2450 		err = log_scroll_down(view, view->nlines - 1);
2451 		if (err)
2452 			break;
2453 		if (first == s->first_displayed_entry &&
2454 		    s->selected < MIN(view->nlines - 2,
2455 		    s->commits.ncommits - 1)) {
2456 			/* can't scroll further down */
2457 			s->selected = MIN(view->nlines - 2,
2458 			    s->commits.ncommits - 1);
2459 		}
2460 		select_commit(s);
2461 		break;
2462 	}
2463 	case KEY_RESIZE:
2464 		if (s->selected > view->nlines - 2)
2465 			s->selected = view->nlines - 2;
2466 		if (s->selected > s->commits.ncommits - 1)
2467 			s->selected = s->commits.ncommits - 1;
2468 		select_commit(s);
2469 		if (s->commits.ncommits < view->nlines - 1 &&
2470 		    !s->thread_args.log_complete) {
2471 			s->thread_args.commits_needed += (view->nlines - 1) -
2472 			    s->commits.ncommits;
2473 			err = trigger_log_thread(view, 1);
2474 		}
2475 		break;
2476 	case KEY_ENTER:
2477 	case ' ':
2478 	case '\r':
2479 		if (s->selected_entry == NULL)
2480 			break;
2481 		if (view_is_parent_view(view))
2482 			begin_x = view_split_begin_x(view->begin_x);
2483 		err = open_diff_view_for_commit(&diff_view, begin_x,
2484 		    s->selected_entry->commit, s->selected_entry->id,
2485 		    view, s->repo);
2486 		if (err)
2487 			break;
2488 		view->focussed = 0;
2489 		diff_view->focussed = 1;
2490 		if (view_is_parent_view(view)) {
2491 			err = view_close_child(view);
2492 			if (err)
2493 				return err;
2494 			view_set_child(view, diff_view);
2495 			view->focus_child = 1;
2496 		} else
2497 			*new_view = diff_view;
2498 		break;
2499 	case 't':
2500 		if (s->selected_entry == NULL)
2501 			break;
2502 		if (view_is_parent_view(view))
2503 			begin_x = view_split_begin_x(view->begin_x);
2504 		err = browse_commit_tree(&tree_view, begin_x,
2505 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2506 		    s->repo);
2507 		if (err)
2508 			break;
2509 		view->focussed = 0;
2510 		tree_view->focussed = 1;
2511 		if (view_is_parent_view(view)) {
2512 			err = view_close_child(view);
2513 			if (err)
2514 				return err;
2515 			view_set_child(view, tree_view);
2516 			view->focus_child = 1;
2517 		} else
2518 			*new_view = tree_view;
2519 		break;
2520 	case KEY_BACKSPACE:
2521 	case CTRL('l'):
2522 	case 'B':
2523 		if (ch == KEY_BACKSPACE &&
2524 		    got_path_is_root_dir(s->in_repo_path))
2525 			break;
2526 		err = stop_log_thread(s);
2527 		if (err)
2528 			return err;
2529 		if (ch == KEY_BACKSPACE) {
2530 			char *parent_path;
2531 			err = got_path_dirname(&parent_path, s->in_repo_path);
2532 			if (err)
2533 				return err;
2534 			free(s->in_repo_path);
2535 			s->in_repo_path = parent_path;
2536 			s->thread_args.in_repo_path = s->in_repo_path;
2537 		} else if (ch == CTRL('l')) {
2538 			struct got_object_id *start_id;
2539 			err = got_repo_match_object_id(&start_id, NULL,
2540 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2541 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2542 			if (err)
2543 				return err;
2544 			free(s->start_id);
2545 			s->start_id = start_id;
2546 			s->thread_args.start_id = s->start_id;
2547 		} else /* 'B' */
2548 			s->log_branches = !s->log_branches;
2549 
2550 		err = got_repo_open(&s->thread_args.repo,
2551 		    got_repo_get_path(s->repo), NULL);
2552 		if (err)
2553 			return err;
2554 		tog_free_refs();
2555 		err = tog_load_refs(s->repo);
2556 		if (err)
2557 			return err;
2558 		err = got_commit_graph_open(&s->thread_args.graph,
2559 		    s->in_repo_path, !s->log_branches);
2560 		if (err)
2561 			return err;
2562 		err = got_commit_graph_iter_start(s->thread_args.graph,
2563 		    s->start_id, s->repo, NULL, NULL);
2564 		if (err)
2565 			return err;
2566 		free_commits(&s->commits);
2567 		s->first_displayed_entry = NULL;
2568 		s->last_displayed_entry = NULL;
2569 		s->selected_entry = NULL;
2570 		s->selected = 0;
2571 		s->thread_args.log_complete = 0;
2572 		s->quit = 0;
2573 		s->thread_args.commits_needed = view->nlines;
2574 		break;
2575 	case 'r':
2576 		if (view_is_parent_view(view))
2577 			begin_x = view_split_begin_x(view->begin_x);
2578 		ref_view = view_open(view->nlines, view->ncols,
2579 		    view->begin_y, begin_x, TOG_VIEW_REF);
2580 		if (ref_view == NULL)
2581 			return got_error_from_errno("view_open");
2582 		err = open_ref_view(ref_view, s->repo);
2583 		if (err) {
2584 			view_close(ref_view);
2585 			return err;
2586 		}
2587 		view->focussed = 0;
2588 		ref_view->focussed = 1;
2589 		if (view_is_parent_view(view)) {
2590 			err = view_close_child(view);
2591 			if (err)
2592 				return err;
2593 			view_set_child(view, ref_view);
2594 			view->focus_child = 1;
2595 		} else
2596 			*new_view = ref_view;
2597 		break;
2598 	default:
2599 		break;
2600 	}
2601 
2602 	return err;
2603 }
2604 
2605 static const struct got_error *
2606 apply_unveil(const char *repo_path, const char *worktree_path)
2607 {
2608 	const struct got_error *error;
2609 
2610 #ifdef PROFILE
2611 	if (unveil("gmon.out", "rwc") != 0)
2612 		return got_error_from_errno2("unveil", "gmon.out");
2613 #endif
2614 	if (repo_path && unveil(repo_path, "r") != 0)
2615 		return got_error_from_errno2("unveil", repo_path);
2616 
2617 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2618 		return got_error_from_errno2("unveil", worktree_path);
2619 
2620 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2621 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2622 
2623 	error = got_privsep_unveil_exec_helpers();
2624 	if (error != NULL)
2625 		return error;
2626 
2627 	if (unveil(NULL, NULL) != 0)
2628 		return got_error_from_errno("unveil");
2629 
2630 	return NULL;
2631 }
2632 
2633 static void
2634 init_curses(void)
2635 {
2636 	initscr();
2637 	cbreak();
2638 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2639 	noecho();
2640 	nonl();
2641 	intrflush(stdscr, FALSE);
2642 	keypad(stdscr, TRUE);
2643 	curs_set(0);
2644 	if (getenv("TOG_COLORS") != NULL) {
2645 		start_color();
2646 		use_default_colors();
2647 	}
2648 	signal(SIGWINCH, tog_sigwinch);
2649 	signal(SIGPIPE, tog_sigpipe);
2650 	signal(SIGCONT, tog_sigcont);
2651 }
2652 
2653 static const struct got_error *
2654 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2655     struct got_repository *repo, struct got_worktree *worktree)
2656 {
2657 	const struct got_error *err = NULL;
2658 
2659 	if (argc == 0) {
2660 		*in_repo_path = strdup("/");
2661 		if (*in_repo_path == NULL)
2662 			return got_error_from_errno("strdup");
2663 		return NULL;
2664 	}
2665 
2666 	if (worktree) {
2667 		const char *prefix = got_worktree_get_path_prefix(worktree);
2668 		char *p;
2669 
2670 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2671 		if (err)
2672 			return err;
2673 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2674 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2675 		    p) == -1) {
2676 			err = got_error_from_errno("asprintf");
2677 			*in_repo_path = NULL;
2678 		}
2679 		free(p);
2680 	} else
2681 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2682 
2683 	return err;
2684 }
2685 
2686 static const struct got_error *
2687 cmd_log(int argc, char *argv[])
2688 {
2689 	const struct got_error *error;
2690 	struct got_repository *repo = NULL;
2691 	struct got_worktree *worktree = NULL;
2692 	struct got_object_id *start_id = NULL;
2693 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2694 	char *start_commit = NULL, *label = NULL;
2695 	struct got_reference *ref = NULL;
2696 	const char *head_ref_name = NULL;
2697 	int ch, log_branches = 0;
2698 	struct tog_view *view;
2699 
2700 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2701 		switch (ch) {
2702 		case 'b':
2703 			log_branches = 1;
2704 			break;
2705 		case 'c':
2706 			start_commit = optarg;
2707 			break;
2708 		case 'r':
2709 			repo_path = realpath(optarg, NULL);
2710 			if (repo_path == NULL)
2711 				return got_error_from_errno2("realpath",
2712 				    optarg);
2713 			break;
2714 		default:
2715 			usage_log();
2716 			/* NOTREACHED */
2717 		}
2718 	}
2719 
2720 	argc -= optind;
2721 	argv += optind;
2722 
2723 	if (argc > 1)
2724 		usage_log();
2725 
2726 	if (repo_path == NULL) {
2727 		cwd = getcwd(NULL, 0);
2728 		if (cwd == NULL)
2729 			return got_error_from_errno("getcwd");
2730 		error = got_worktree_open(&worktree, cwd);
2731 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2732 			goto done;
2733 		if (worktree)
2734 			repo_path =
2735 			    strdup(got_worktree_get_repo_path(worktree));
2736 		else
2737 			repo_path = strdup(cwd);
2738 		if (repo_path == NULL) {
2739 			error = got_error_from_errno("strdup");
2740 			goto done;
2741 		}
2742 	}
2743 
2744 	error = got_repo_open(&repo, repo_path, NULL);
2745 	if (error != NULL)
2746 		goto done;
2747 
2748 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
2749 	    repo, worktree);
2750 	if (error)
2751 		goto done;
2752 
2753 	init_curses();
2754 
2755 	error = apply_unveil(got_repo_get_path(repo),
2756 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2757 	if (error)
2758 		goto done;
2759 
2760 	/* already loaded by tog_log_with_path()? */
2761 	if (TAILQ_EMPTY(&tog_refs)) {
2762 		error = tog_load_refs(repo);
2763 		if (error)
2764 			goto done;
2765 	}
2766 
2767 	if (start_commit == NULL) {
2768 		error = got_repo_match_object_id(&start_id, &label,
2769 		    worktree ? got_worktree_get_head_ref_name(worktree) :
2770 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
2771 		if (error)
2772 			goto done;
2773 		head_ref_name = label;
2774 	} else {
2775 		error = got_ref_open(&ref, repo, start_commit, 0);
2776 		if (error == NULL)
2777 			head_ref_name = got_ref_get_name(ref);
2778 		else if (error->code != GOT_ERR_NOT_REF)
2779 			goto done;
2780 		error = got_repo_match_object_id(&start_id, NULL,
2781 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
2782 		if (error)
2783 			goto done;
2784 	}
2785 
2786 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2787 	if (view == NULL) {
2788 		error = got_error_from_errno("view_open");
2789 		goto done;
2790 	}
2791 	error = open_log_view(view, start_id, repo, head_ref_name,
2792 	    in_repo_path, log_branches);
2793 	if (error)
2794 		goto done;
2795 	if (worktree) {
2796 		/* Release work tree lock. */
2797 		got_worktree_close(worktree);
2798 		worktree = NULL;
2799 	}
2800 	error = view_loop(view);
2801 done:
2802 	free(in_repo_path);
2803 	free(repo_path);
2804 	free(cwd);
2805 	free(start_id);
2806 	free(label);
2807 	if (ref)
2808 		got_ref_close(ref);
2809 	if (repo)
2810 		got_repo_close(repo);
2811 	if (worktree)
2812 		got_worktree_close(worktree);
2813 	tog_free_refs();
2814 	return error;
2815 }
2816 
2817 __dead static void
2818 usage_diff(void)
2819 {
2820 	endwin();
2821 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
2822 	    "[-w] object1 object2\n", getprogname());
2823 	exit(1);
2824 }
2825 
2826 static int
2827 match_line(const char *line, regex_t *regex, size_t nmatch,
2828     regmatch_t *regmatch)
2829 {
2830 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
2831 }
2832 
2833 struct tog_color *
2834 match_color(struct tog_colors *colors, const char *line)
2835 {
2836 	struct tog_color *tc = NULL;
2837 
2838 	SIMPLEQ_FOREACH(tc, colors, entry) {
2839 		if (match_line(line, &tc->regex, 0, NULL))
2840 			return tc;
2841 	}
2842 
2843 	return NULL;
2844 }
2845 
2846 static const struct got_error *
2847 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
2848     WINDOW *window, regmatch_t *regmatch)
2849 {
2850 	const struct got_error *err = NULL;
2851 	wchar_t *wline;
2852 	int width;
2853 	char *s;
2854 
2855 	*wtotal = 0;
2856 
2857 	s = strndup(line, regmatch->rm_so);
2858 	if (s == NULL)
2859 		return got_error_from_errno("strndup");
2860 
2861 	err = format_line(&wline, &width, s, wlimit, col_tab_align);
2862 	if (err) {
2863 		free(s);
2864 		return err;
2865 	}
2866 	waddwstr(window, wline);
2867 	free(wline);
2868 	free(s);
2869 	wlimit -= width;
2870 	*wtotal += width;
2871 
2872 	if (wlimit > 0) {
2873 		s = strndup(line + regmatch->rm_so,
2874 		    regmatch->rm_eo - regmatch->rm_so);
2875 		if (s == NULL) {
2876 			err = got_error_from_errno("strndup");
2877 			free(s);
2878 			return err;
2879 		}
2880 		err = format_line(&wline, &width, s, wlimit, col_tab_align);
2881 		if (err) {
2882 			free(s);
2883 			return err;
2884 		}
2885 		wattr_on(window, A_STANDOUT, NULL);
2886 		waddwstr(window, wline);
2887 		wattr_off(window, A_STANDOUT, NULL);
2888 		free(wline);
2889 		free(s);
2890 		wlimit -= width;
2891 		*wtotal += width;
2892 	}
2893 
2894 	if (wlimit > 0 && strlen(line) > regmatch->rm_eo) {
2895 		err = format_line(&wline, &width,
2896 		    line + regmatch->rm_eo, wlimit, col_tab_align);
2897 		if (err)
2898 			return err;
2899 		waddwstr(window, wline);
2900 		free(wline);
2901 		*wtotal += width;
2902 	}
2903 
2904 	return NULL;
2905 }
2906 
2907 static const struct got_error *
2908 draw_file(struct tog_view *view, const char *header)
2909 {
2910 	struct tog_diff_view_state *s = &view->state.diff;
2911 	regmatch_t *regmatch = &view->regmatch;
2912 	const struct got_error *err;
2913 	int nprinted = 0;
2914 	char *line;
2915 	size_t linesize = 0;
2916 	ssize_t linelen;
2917 	struct tog_color *tc;
2918 	wchar_t *wline;
2919 	int width;
2920 	int max_lines = view->nlines;
2921 	int nlines = s->nlines;
2922 	off_t line_offset;
2923 
2924 	line_offset = s->line_offsets[s->first_displayed_line - 1];
2925 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
2926 		return got_error_from_errno("fseek");
2927 
2928 	werase(view->window);
2929 
2930 	if (header) {
2931 		if (asprintf(&line, "[%d/%d] %s",
2932 		    s->first_displayed_line - 1 + s->selected_line, nlines,
2933 		    header) == -1)
2934 			return got_error_from_errno("asprintf");
2935 		err = format_line(&wline, &width, line, view->ncols, 0);
2936 		free(line);
2937 		if (err)
2938 			return err;
2939 
2940 		if (view_needs_focus_indication(view))
2941 			wstandout(view->window);
2942 		waddwstr(view->window, wline);
2943 		free(wline);
2944 		wline = NULL;
2945 		if (view_needs_focus_indication(view))
2946 			wstandend(view->window);
2947 		if (width <= view->ncols - 1)
2948 			waddch(view->window, '\n');
2949 
2950 		if (max_lines <= 1)
2951 			return NULL;
2952 		max_lines--;
2953 	}
2954 
2955 	s->eof = 0;
2956 	line = NULL;
2957 	while (max_lines > 0 && nprinted < max_lines) {
2958 		linelen = getline(&line, &linesize, s->f);
2959 		if (linelen == -1) {
2960 			if (feof(s->f)) {
2961 				s->eof = 1;
2962 				break;
2963 			}
2964 			free(line);
2965 			return got_ferror(s->f, GOT_ERR_IO);
2966 		}
2967 
2968 		tc = match_color(&s->colors, line);
2969 		if (tc)
2970 			wattr_on(view->window,
2971 			    COLOR_PAIR(tc->colorpair), NULL);
2972 		if (s->first_displayed_line + nprinted == s->matched_line &&
2973 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
2974 			err = add_matched_line(&width, line, view->ncols, 0,
2975 			    view->window, regmatch);
2976 			if (err) {
2977 				free(line);
2978 				return err;
2979 			}
2980 		} else {
2981 			err = format_line(&wline, &width, line, view->ncols, 0);
2982 			if (err) {
2983 				free(line);
2984 				return err;
2985 			}
2986 			waddwstr(view->window, wline);
2987 			free(wline);
2988 			wline = NULL;
2989 		}
2990 		if (tc)
2991 			wattr_off(view->window,
2992 			    COLOR_PAIR(tc->colorpair), NULL);
2993 		if (width <= view->ncols - 1)
2994 			waddch(view->window, '\n');
2995 		nprinted++;
2996 	}
2997 	free(line);
2998 	if (nprinted >= 1)
2999 		s->last_displayed_line = s->first_displayed_line +
3000 		    (nprinted - 1);
3001 	else
3002 		s->last_displayed_line = s->first_displayed_line;
3003 
3004 	view_vborder(view);
3005 
3006 	if (s->eof) {
3007 		while (nprinted < view->nlines) {
3008 			waddch(view->window, '\n');
3009 			nprinted++;
3010 		}
3011 
3012 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols, 0);
3013 		if (err) {
3014 			return err;
3015 		}
3016 
3017 		wstandout(view->window);
3018 		waddwstr(view->window, wline);
3019 		free(wline);
3020 		wline = NULL;
3021 		wstandend(view->window);
3022 	}
3023 
3024 	return NULL;
3025 }
3026 
3027 static char *
3028 get_datestr(time_t *time, char *datebuf)
3029 {
3030 	struct tm mytm, *tm;
3031 	char *p, *s;
3032 
3033 	tm = gmtime_r(time, &mytm);
3034 	if (tm == NULL)
3035 		return NULL;
3036 	s = asctime_r(tm, datebuf);
3037 	if (s == NULL)
3038 		return NULL;
3039 	p = strchr(s, '\n');
3040 	if (p)
3041 		*p = '\0';
3042 	return s;
3043 }
3044 
3045 static const struct got_error *
3046 get_changed_paths(struct got_pathlist_head *paths,
3047     struct got_commit_object *commit, struct got_repository *repo)
3048 {
3049 	const struct got_error *err = NULL;
3050 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3051 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3052 	struct got_object_qid *qid;
3053 
3054 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
3055 	if (qid != NULL) {
3056 		struct got_commit_object *pcommit;
3057 		err = got_object_open_as_commit(&pcommit, repo,
3058 		    qid->id);
3059 		if (err)
3060 			return err;
3061 
3062 		tree_id1 = got_object_commit_get_tree_id(pcommit);
3063 		got_object_commit_close(pcommit);
3064 
3065 	}
3066 
3067 	if (tree_id1) {
3068 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3069 		if (err)
3070 			goto done;
3071 	}
3072 
3073 	tree_id2 = got_object_commit_get_tree_id(commit);
3074 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3075 	if (err)
3076 		goto done;
3077 
3078 	err = got_diff_tree(tree1, tree2, "", "", repo,
3079 	    got_diff_tree_collect_changed_paths, paths, 0);
3080 done:
3081 	if (tree1)
3082 		got_object_tree_close(tree1);
3083 	if (tree2)
3084 		got_object_tree_close(tree2);
3085 	return err;
3086 }
3087 
3088 static const struct got_error *
3089 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3090 {
3091 	off_t *p;
3092 
3093 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3094 	if (p == NULL)
3095 		return got_error_from_errno("reallocarray");
3096 	*line_offsets = p;
3097 	(*line_offsets)[*nlines] = off;
3098 	(*nlines)++;
3099 	return NULL;
3100 }
3101 
3102 static const struct got_error *
3103 write_commit_info(off_t **line_offsets, size_t *nlines,
3104     struct got_object_id *commit_id, struct got_reflist_head *refs,
3105     struct got_repository *repo, FILE *outfile)
3106 {
3107 	const struct got_error *err = NULL;
3108 	char datebuf[26], *datestr;
3109 	struct got_commit_object *commit;
3110 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3111 	time_t committer_time;
3112 	const char *author, *committer;
3113 	char *refs_str = NULL;
3114 	struct got_pathlist_head changed_paths;
3115 	struct got_pathlist_entry *pe;
3116 	off_t outoff = 0;
3117 	int n;
3118 
3119 	TAILQ_INIT(&changed_paths);
3120 
3121 	if (refs) {
3122 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3123 		if (err)
3124 			return err;
3125 	}
3126 
3127 	err = got_object_open_as_commit(&commit, repo, commit_id);
3128 	if (err)
3129 		return err;
3130 
3131 	err = got_object_id_str(&id_str, commit_id);
3132 	if (err) {
3133 		err = got_error_from_errno("got_object_id_str");
3134 		goto done;
3135 	}
3136 
3137 	err = add_line_offset(line_offsets, nlines, 0);
3138 	if (err)
3139 		goto done;
3140 
3141 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3142 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3143 	if (n < 0) {
3144 		err = got_error_from_errno("fprintf");
3145 		goto done;
3146 	}
3147 	outoff += n;
3148 	err = add_line_offset(line_offsets, nlines, outoff);
3149 	if (err)
3150 		goto done;
3151 
3152 	n = fprintf(outfile, "from: %s\n",
3153 	    got_object_commit_get_author(commit));
3154 	if (n < 0) {
3155 		err = got_error_from_errno("fprintf");
3156 		goto done;
3157 	}
3158 	outoff += n;
3159 	err = add_line_offset(line_offsets, nlines, outoff);
3160 	if (err)
3161 		goto done;
3162 
3163 	committer_time = got_object_commit_get_committer_time(commit);
3164 	datestr = get_datestr(&committer_time, datebuf);
3165 	if (datestr) {
3166 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3167 		if (n < 0) {
3168 			err = got_error_from_errno("fprintf");
3169 			goto done;
3170 		}
3171 		outoff += n;
3172 		err = add_line_offset(line_offsets, nlines, outoff);
3173 		if (err)
3174 			goto done;
3175 	}
3176 	author = got_object_commit_get_author(commit);
3177 	committer = got_object_commit_get_committer(commit);
3178 	if (strcmp(author, committer) != 0) {
3179 		n = fprintf(outfile, "via: %s\n", committer);
3180 		if (n < 0) {
3181 			err = got_error_from_errno("fprintf");
3182 			goto done;
3183 		}
3184 		outoff += n;
3185 		err = add_line_offset(line_offsets, nlines, outoff);
3186 		if (err)
3187 			goto done;
3188 	}
3189 	err = got_object_commit_get_logmsg(&logmsg, commit);
3190 	if (err)
3191 		goto done;
3192 	s = logmsg;
3193 	while ((line = strsep(&s, "\n")) != NULL) {
3194 		n = fprintf(outfile, "%s\n", line);
3195 		if (n < 0) {
3196 			err = got_error_from_errno("fprintf");
3197 			goto done;
3198 		}
3199 		outoff += n;
3200 		err = add_line_offset(line_offsets, nlines, outoff);
3201 		if (err)
3202 			goto done;
3203 	}
3204 
3205 	err = get_changed_paths(&changed_paths, commit, repo);
3206 	if (err)
3207 		goto done;
3208 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3209 		struct got_diff_changed_path *cp = pe->data;
3210 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3211 		if (n < 0) {
3212 			err = got_error_from_errno("fprintf");
3213 			goto done;
3214 		}
3215 		outoff += n;
3216 		err = add_line_offset(line_offsets, nlines, outoff);
3217 		if (err)
3218 			goto done;
3219 		free((char *)pe->path);
3220 		free(pe->data);
3221 	}
3222 
3223 	fputc('\n', outfile);
3224 	outoff++;
3225 	err = add_line_offset(line_offsets, nlines, outoff);
3226 done:
3227 	got_pathlist_free(&changed_paths);
3228 	free(id_str);
3229 	free(logmsg);
3230 	free(refs_str);
3231 	got_object_commit_close(commit);
3232 	if (err) {
3233 		free(*line_offsets);
3234 		*line_offsets = NULL;
3235 		*nlines = 0;
3236 	}
3237 	return err;
3238 }
3239 
3240 static const struct got_error *
3241 create_diff(struct tog_diff_view_state *s)
3242 {
3243 	const struct got_error *err = NULL;
3244 	FILE *f = NULL;
3245 	int obj_type;
3246 
3247 	free(s->line_offsets);
3248 	s->line_offsets = malloc(sizeof(off_t));
3249 	if (s->line_offsets == NULL)
3250 		return got_error_from_errno("malloc");
3251 	s->nlines = 0;
3252 
3253 	f = got_opentemp();
3254 	if (f == NULL) {
3255 		err = got_error_from_errno("got_opentemp");
3256 		goto done;
3257 	}
3258 	if (s->f && fclose(s->f) == EOF) {
3259 		err = got_error_from_errno("fclose");
3260 		goto done;
3261 	}
3262 	s->f = f;
3263 
3264 	if (s->id1)
3265 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3266 	else
3267 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3268 	if (err)
3269 		goto done;
3270 
3271 	switch (obj_type) {
3272 	case GOT_OBJ_TYPE_BLOB:
3273 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3274 		    s->id1, s->id2, s->label1, s->label2, s->diff_context,
3275 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3276 		break;
3277 	case GOT_OBJ_TYPE_TREE:
3278 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3279 		    s->id1, s->id2, "", "", s->diff_context,
3280 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3281 		break;
3282 	case GOT_OBJ_TYPE_COMMIT: {
3283 		const struct got_object_id_queue *parent_ids;
3284 		struct got_object_qid *pid;
3285 		struct got_commit_object *commit2;
3286 		struct got_reflist_head *refs;
3287 
3288 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3289 		if (err)
3290 			goto done;
3291 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3292 		/* Show commit info if we're diffing to a parent/root commit. */
3293 		if (s->id1 == NULL) {
3294 			err = write_commit_info(&s->line_offsets, &s->nlines,
3295 			    s->id2, refs, s->repo, s->f);
3296 			if (err)
3297 				goto done;
3298 		} else {
3299 			parent_ids = got_object_commit_get_parent_ids(commit2);
3300 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
3301 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
3302 					err = write_commit_info(
3303 					    &s->line_offsets, &s->nlines,
3304 					    s->id2, refs, s->repo, s->f);
3305 					if (err)
3306 						goto done;
3307 					break;
3308 				}
3309 			}
3310 		}
3311 		got_object_commit_close(commit2);
3312 
3313 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3314 		    s->id1, s->id2, s->diff_context, s->ignore_whitespace,
3315 		    s->force_text_diff, s->repo, s->f);
3316 		break;
3317 	}
3318 	default:
3319 		err = got_error(GOT_ERR_OBJ_TYPE);
3320 		break;
3321 	}
3322 	if (err)
3323 		goto done;
3324 done:
3325 	if (s->f && fflush(s->f) != 0 && err == NULL)
3326 		err = got_error_from_errno("fflush");
3327 	return err;
3328 }
3329 
3330 static void
3331 diff_view_indicate_progress(struct tog_view *view)
3332 {
3333 	mvwaddstr(view->window, 0, 0, "diffing...");
3334 	update_panels();
3335 	doupdate();
3336 }
3337 
3338 static const struct got_error *
3339 search_start_diff_view(struct tog_view *view)
3340 {
3341 	struct tog_diff_view_state *s = &view->state.diff;
3342 
3343 	s->matched_line = 0;
3344 	return NULL;
3345 }
3346 
3347 static const struct got_error *
3348 search_next_diff_view(struct tog_view *view)
3349 {
3350 	struct tog_diff_view_state *s = &view->state.diff;
3351 	int lineno;
3352 	char *line = NULL;
3353 	size_t linesize = 0;
3354 	ssize_t linelen;
3355 
3356 	if (!view->searching) {
3357 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3358 		return NULL;
3359 	}
3360 
3361 	if (s->matched_line) {
3362 		if (view->searching == TOG_SEARCH_FORWARD)
3363 			lineno = s->matched_line + 1;
3364 		else
3365 			lineno = s->matched_line - 1;
3366 	} else {
3367 		if (view->searching == TOG_SEARCH_FORWARD)
3368 			lineno = 1;
3369 		else
3370 			lineno = s->nlines;
3371 	}
3372 
3373 	while (1) {
3374 		off_t offset;
3375 
3376 		if (lineno <= 0 || lineno > s->nlines) {
3377 			if (s->matched_line == 0) {
3378 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3379 				break;
3380 			}
3381 
3382 			if (view->searching == TOG_SEARCH_FORWARD)
3383 				lineno = 1;
3384 			else
3385 				lineno = s->nlines;
3386 		}
3387 
3388 		offset = s->line_offsets[lineno - 1];
3389 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3390 			free(line);
3391 			return got_error_from_errno("fseeko");
3392 		}
3393 		linelen = getline(&line, &linesize, s->f);
3394 		if (linelen != -1 &&
3395 		    match_line(line, &view->regex, 1, &view->regmatch)) {
3396 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3397 			s->matched_line = lineno;
3398 			break;
3399 		}
3400 		if (view->searching == TOG_SEARCH_FORWARD)
3401 			lineno++;
3402 		else
3403 			lineno--;
3404 	}
3405 	free(line);
3406 
3407 	if (s->matched_line) {
3408 		s->first_displayed_line = s->matched_line;
3409 		s->selected_line = 1;
3410 	}
3411 
3412 	return NULL;
3413 }
3414 
3415 static const struct got_error *
3416 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3417     struct got_object_id *id2, const char *label1, const char *label2,
3418     int diff_context, int ignore_whitespace, int force_text_diff,
3419     struct tog_view *log_view, struct got_repository *repo)
3420 {
3421 	const struct got_error *err;
3422 	struct tog_diff_view_state *s = &view->state.diff;
3423 
3424 	if (id1 != NULL && id2 != NULL) {
3425 	    int type1, type2;
3426 	    err = got_object_get_type(&type1, repo, id1);
3427 	    if (err)
3428 		return err;
3429 	    err = got_object_get_type(&type2, repo, id2);
3430 	    if (err)
3431 		return err;
3432 
3433 	    if (type1 != type2)
3434 		return got_error(GOT_ERR_OBJ_TYPE);
3435 	}
3436 	s->first_displayed_line = 1;
3437 	s->last_displayed_line = view->nlines;
3438 	s->selected_line = 1;
3439 	s->repo = repo;
3440 	s->id1 = id1;
3441 	s->id2 = id2;
3442 	s->label1 = label1;
3443 	s->label2 = label2;
3444 
3445 	if (id1) {
3446 		s->id1 = got_object_id_dup(id1);
3447 		if (s->id1 == NULL)
3448 			return got_error_from_errno("got_object_id_dup");
3449 	} else
3450 		s->id1 = NULL;
3451 
3452 	s->id2 = got_object_id_dup(id2);
3453 	if (s->id2 == NULL) {
3454 		free(s->id1);
3455 		s->id1 = NULL;
3456 		return got_error_from_errno("got_object_id_dup");
3457 	}
3458 	s->f = NULL;
3459 	s->first_displayed_line = 1;
3460 	s->last_displayed_line = view->nlines;
3461 	s->diff_context = diff_context;
3462 	s->ignore_whitespace = ignore_whitespace;
3463 	s->force_text_diff = force_text_diff;
3464 	s->log_view = log_view;
3465 	s->repo = repo;
3466 
3467 	SIMPLEQ_INIT(&s->colors);
3468 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3469 		err = add_color(&s->colors,
3470 		    "^-", TOG_COLOR_DIFF_MINUS,
3471 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3472 		if (err)
3473 			return err;
3474 		err = add_color(&s->colors, "^\\+",
3475 		    TOG_COLOR_DIFF_PLUS,
3476 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3477 		if (err) {
3478 			free_colors(&s->colors);
3479 			return err;
3480 		}
3481 		err = add_color(&s->colors,
3482 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3483 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3484 		if (err) {
3485 			free_colors(&s->colors);
3486 			return err;
3487 		}
3488 
3489 		err = add_color(&s->colors,
3490 		    "^(commit [0-9a-f]|(blob|file) [-+] |[MDmA]  [^ ])",
3491 		    TOG_COLOR_DIFF_META,
3492 		    get_color_value("TOG_COLOR_DIFF_META"));
3493 		if (err) {
3494 			free_colors(&s->colors);
3495 			return err;
3496 		}
3497 
3498 		err = add_color(&s->colors,
3499 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3500 		    get_color_value("TOG_COLOR_AUTHOR"));
3501 		if (err) {
3502 			free_colors(&s->colors);
3503 			return err;
3504 		}
3505 
3506 		err = add_color(&s->colors,
3507 		    "^date: ", TOG_COLOR_DATE,
3508 		    get_color_value("TOG_COLOR_DATE"));
3509 		if (err) {
3510 			free_colors(&s->colors);
3511 			return err;
3512 		}
3513 	}
3514 
3515 	if (log_view && view_is_splitscreen(view))
3516 		show_log_view(log_view); /* draw vborder */
3517 	diff_view_indicate_progress(view);
3518 
3519 	s->line_offsets = NULL;
3520 	s->nlines = 0;
3521 	err = create_diff(s);
3522 	if (err) {
3523 		free(s->id1);
3524 		s->id1 = NULL;
3525 		free(s->id2);
3526 		s->id2 = NULL;
3527 		free_colors(&s->colors);
3528 		return err;
3529 	}
3530 
3531 	view->show = show_diff_view;
3532 	view->input = input_diff_view;
3533 	view->close = close_diff_view;
3534 	view->search_start = search_start_diff_view;
3535 	view->search_next = search_next_diff_view;
3536 
3537 	return NULL;
3538 }
3539 
3540 static const struct got_error *
3541 close_diff_view(struct tog_view *view)
3542 {
3543 	const struct got_error *err = NULL;
3544 	struct tog_diff_view_state *s = &view->state.diff;
3545 
3546 	free(s->id1);
3547 	s->id1 = NULL;
3548 	free(s->id2);
3549 	s->id2 = NULL;
3550 	if (s->f && fclose(s->f) == EOF)
3551 		err = got_error_from_errno("fclose");
3552 	free_colors(&s->colors);
3553 	free(s->line_offsets);
3554 	s->line_offsets = NULL;
3555 	s->nlines = 0;
3556 	return err;
3557 }
3558 
3559 static const struct got_error *
3560 show_diff_view(struct tog_view *view)
3561 {
3562 	const struct got_error *err;
3563 	struct tog_diff_view_state *s = &view->state.diff;
3564 	char *id_str1 = NULL, *id_str2, *header;
3565 	const char *label1, *label2;
3566 
3567 	if (s->id1) {
3568 		err = got_object_id_str(&id_str1, s->id1);
3569 		if (err)
3570 			return err;
3571 		label1 = s->label1 ? : id_str1;
3572 	} else
3573 		label1 = "/dev/null";
3574 
3575 	err = got_object_id_str(&id_str2, s->id2);
3576 	if (err)
3577 		return err;
3578 	label2 = s->label2 ? : id_str2;
3579 
3580 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3581 		err = got_error_from_errno("asprintf");
3582 		free(id_str1);
3583 		free(id_str2);
3584 		return err;
3585 	}
3586 	free(id_str1);
3587 	free(id_str2);
3588 
3589 	return draw_file(view, header);
3590 }
3591 
3592 static const struct got_error *
3593 set_selected_commit(struct tog_diff_view_state *s,
3594     struct commit_queue_entry *entry)
3595 {
3596 	const struct got_error *err;
3597 	const struct got_object_id_queue *parent_ids;
3598 	struct got_commit_object *selected_commit;
3599 	struct got_object_qid *pid;
3600 
3601 	free(s->id2);
3602 	s->id2 = got_object_id_dup(entry->id);
3603 	if (s->id2 == NULL)
3604 		return got_error_from_errno("got_object_id_dup");
3605 
3606 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3607 	if (err)
3608 		return err;
3609 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3610 	free(s->id1);
3611 	pid = SIMPLEQ_FIRST(parent_ids);
3612 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
3613 	got_object_commit_close(selected_commit);
3614 	return NULL;
3615 }
3616 
3617 static const struct got_error *
3618 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3619 {
3620 	const struct got_error *err = NULL;
3621 	struct tog_diff_view_state *s = &view->state.diff;
3622 	struct tog_log_view_state *ls;
3623 	struct commit_queue_entry *old_selected_entry;
3624 	char *line = NULL;
3625 	size_t linesize = 0;
3626 	ssize_t linelen;
3627 	int i;
3628 
3629 	switch (ch) {
3630 	case 'a':
3631 	case 'w':
3632 		if (ch == 'a')
3633 			s->force_text_diff = !s->force_text_diff;
3634 		if (ch == 'w')
3635 			s->ignore_whitespace = !s->ignore_whitespace;
3636 		wclear(view->window);
3637 		s->first_displayed_line = 1;
3638 		s->last_displayed_line = view->nlines;
3639 		diff_view_indicate_progress(view);
3640 		err = create_diff(s);
3641 		break;
3642 	case 'k':
3643 	case KEY_UP:
3644 		if (s->first_displayed_line > 1)
3645 			s->first_displayed_line--;
3646 		break;
3647 	case KEY_PPAGE:
3648 	case CTRL('b'):
3649 		if (s->first_displayed_line == 1)
3650 			break;
3651 		i = 0;
3652 		while (i++ < view->nlines - 1 &&
3653 		    s->first_displayed_line > 1)
3654 			s->first_displayed_line--;
3655 		break;
3656 	case 'j':
3657 	case KEY_DOWN:
3658 		if (!s->eof)
3659 			s->first_displayed_line++;
3660 		break;
3661 	case KEY_NPAGE:
3662 	case CTRL('f'):
3663 	case ' ':
3664 		if (s->eof)
3665 			break;
3666 		i = 0;
3667 		while (!s->eof && i++ < view->nlines - 1) {
3668 			linelen = getline(&line, &linesize, s->f);
3669 			s->first_displayed_line++;
3670 			if (linelen == -1) {
3671 				if (feof(s->f)) {
3672 					s->eof = 1;
3673 				} else
3674 					err = got_ferror(s->f, GOT_ERR_IO);
3675 				break;
3676 			}
3677 		}
3678 		free(line);
3679 		break;
3680 	case '[':
3681 		if (s->diff_context > 0) {
3682 			s->diff_context--;
3683 			diff_view_indicate_progress(view);
3684 			err = create_diff(s);
3685 			if (s->first_displayed_line + view->nlines - 1 >
3686 			    s->nlines) {
3687 				s->first_displayed_line = 1;
3688 				s->last_displayed_line = view->nlines;
3689 			}
3690 		}
3691 		break;
3692 	case ']':
3693 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
3694 			s->diff_context++;
3695 			diff_view_indicate_progress(view);
3696 			err = create_diff(s);
3697 		}
3698 		break;
3699 	case '<':
3700 	case ',':
3701 		if (s->log_view == NULL)
3702 			break;
3703 		ls = &s->log_view->state.log;
3704 		old_selected_entry = ls->selected_entry;
3705 
3706 		err = input_log_view(NULL, s->log_view, KEY_UP);
3707 		if (err)
3708 			break;
3709 
3710 		if (old_selected_entry == ls->selected_entry)
3711 			break;
3712 
3713 		err = set_selected_commit(s, ls->selected_entry);
3714 		if (err)
3715 			break;
3716 
3717 		s->first_displayed_line = 1;
3718 		s->last_displayed_line = view->nlines;
3719 
3720 		diff_view_indicate_progress(view);
3721 		err = create_diff(s);
3722 		break;
3723 	case '>':
3724 	case '.':
3725 		if (s->log_view == NULL)
3726 			break;
3727 		ls = &s->log_view->state.log;
3728 		old_selected_entry = ls->selected_entry;
3729 
3730 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
3731 		if (err)
3732 			break;
3733 
3734 		if (old_selected_entry == ls->selected_entry)
3735 			break;
3736 
3737 		err = set_selected_commit(s, ls->selected_entry);
3738 		if (err)
3739 			break;
3740 
3741 		s->first_displayed_line = 1;
3742 		s->last_displayed_line = view->nlines;
3743 
3744 		diff_view_indicate_progress(view);
3745 		err = create_diff(s);
3746 		break;
3747 	default:
3748 		break;
3749 	}
3750 
3751 	return err;
3752 }
3753 
3754 static const struct got_error *
3755 cmd_diff(int argc, char *argv[])
3756 {
3757 	const struct got_error *error = NULL;
3758 	struct got_repository *repo = NULL;
3759 	struct got_worktree *worktree = NULL;
3760 	struct got_object_id *id1 = NULL, *id2 = NULL;
3761 	char *repo_path = NULL, *cwd = NULL;
3762 	char *id_str1 = NULL, *id_str2 = NULL;
3763 	char *label1 = NULL, *label2 = NULL;
3764 	int diff_context = 3, ignore_whitespace = 0;
3765 	int ch, force_text_diff = 0;
3766 	const char *errstr;
3767 	struct tog_view *view;
3768 
3769 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
3770 		switch (ch) {
3771 		case 'a':
3772 			force_text_diff = 1;
3773 			break;
3774 		case 'C':
3775 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
3776 			    &errstr);
3777 			if (errstr != NULL)
3778 				err(1, "-C option %s", errstr);
3779 			break;
3780 		case 'r':
3781 			repo_path = realpath(optarg, NULL);
3782 			if (repo_path == NULL)
3783 				return got_error_from_errno2("realpath",
3784 				    optarg);
3785 			got_path_strip_trailing_slashes(repo_path);
3786 			break;
3787 		case 'w':
3788 			ignore_whitespace = 1;
3789 			break;
3790 		default:
3791 			usage_diff();
3792 			/* NOTREACHED */
3793 		}
3794 	}
3795 
3796 	argc -= optind;
3797 	argv += optind;
3798 
3799 	if (argc == 0) {
3800 		usage_diff(); /* TODO show local worktree changes */
3801 	} else if (argc == 2) {
3802 		id_str1 = argv[0];
3803 		id_str2 = argv[1];
3804 	} else
3805 		usage_diff();
3806 
3807 	if (repo_path == NULL) {
3808 		cwd = getcwd(NULL, 0);
3809 		if (cwd == NULL)
3810 			return got_error_from_errno("getcwd");
3811 		error = got_worktree_open(&worktree, cwd);
3812 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3813 			goto done;
3814 		if (worktree)
3815 			repo_path =
3816 			    strdup(got_worktree_get_repo_path(worktree));
3817 		else
3818 			repo_path = strdup(cwd);
3819 		if (repo_path == NULL) {
3820 			error = got_error_from_errno("strdup");
3821 			goto done;
3822 		}
3823 	}
3824 
3825 	error = got_repo_open(&repo, repo_path, NULL);
3826 	if (error)
3827 		goto done;
3828 
3829 	init_curses();
3830 
3831 	error = apply_unveil(got_repo_get_path(repo), NULL);
3832 	if (error)
3833 		goto done;
3834 
3835 	error = tog_load_refs(repo);
3836 	if (error)
3837 		goto done;
3838 
3839 	error = got_repo_match_object_id(&id1, &label1, id_str1,
3840 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
3841 	if (error)
3842 		goto done;
3843 
3844 	error = got_repo_match_object_id(&id2, &label2, id_str2,
3845 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
3846 	if (error)
3847 		goto done;
3848 
3849 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
3850 	if (view == NULL) {
3851 		error = got_error_from_errno("view_open");
3852 		goto done;
3853 	}
3854 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
3855 	    ignore_whitespace, force_text_diff, NULL,  repo);
3856 	if (error)
3857 		goto done;
3858 	error = view_loop(view);
3859 done:
3860 	free(label1);
3861 	free(label2);
3862 	free(repo_path);
3863 	free(cwd);
3864 	if (repo)
3865 		got_repo_close(repo);
3866 	if (worktree)
3867 		got_worktree_close(worktree);
3868 	tog_free_refs();
3869 	return error;
3870 }
3871 
3872 __dead static void
3873 usage_blame(void)
3874 {
3875 	endwin();
3876 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
3877 	    getprogname());
3878 	exit(1);
3879 }
3880 
3881 struct tog_blame_line {
3882 	int annotated;
3883 	struct got_object_id *id;
3884 };
3885 
3886 static const struct got_error *
3887 draw_blame(struct tog_view *view)
3888 {
3889 	struct tog_blame_view_state *s = &view->state.blame;
3890 	struct tog_blame *blame = &s->blame;
3891 	regmatch_t *regmatch = &view->regmatch;
3892 	const struct got_error *err;
3893 	int lineno = 0, nprinted = 0;
3894 	char *line = NULL;
3895 	size_t linesize = 0;
3896 	ssize_t linelen;
3897 	wchar_t *wline;
3898 	int width;
3899 	struct tog_blame_line *blame_line;
3900 	struct got_object_id *prev_id = NULL;
3901 	char *id_str;
3902 	struct tog_color *tc;
3903 
3904 	err = got_object_id_str(&id_str, s->blamed_commit->id);
3905 	if (err)
3906 		return err;
3907 
3908 	rewind(blame->f);
3909 	werase(view->window);
3910 
3911 	if (asprintf(&line, "commit %s", id_str) == -1) {
3912 		err = got_error_from_errno("asprintf");
3913 		free(id_str);
3914 		return err;
3915 	}
3916 
3917 	err = format_line(&wline, &width, line, view->ncols, 0);
3918 	free(line);
3919 	line = NULL;
3920 	if (err)
3921 		return err;
3922 	if (view_needs_focus_indication(view))
3923 		wstandout(view->window);
3924 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
3925 	if (tc)
3926 		wattr_on(view->window,
3927 		    COLOR_PAIR(tc->colorpair), NULL);
3928 	waddwstr(view->window, wline);
3929 	if (tc)
3930 		wattr_off(view->window,
3931 		    COLOR_PAIR(tc->colorpair), NULL);
3932 	if (view_needs_focus_indication(view))
3933 		wstandend(view->window);
3934 	free(wline);
3935 	wline = NULL;
3936 	if (width < view->ncols - 1)
3937 		waddch(view->window, '\n');
3938 
3939 	if (asprintf(&line, "[%d/%d] %s%s",
3940 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
3941 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
3942 		free(id_str);
3943 		return got_error_from_errno("asprintf");
3944 	}
3945 	free(id_str);
3946 	err = format_line(&wline, &width, line, view->ncols, 0);
3947 	free(line);
3948 	line = NULL;
3949 	if (err)
3950 		return err;
3951 	waddwstr(view->window, wline);
3952 	free(wline);
3953 	wline = NULL;
3954 	if (width < view->ncols - 1)
3955 		waddch(view->window, '\n');
3956 
3957 	s->eof = 0;
3958 	while (nprinted < view->nlines - 2) {
3959 		linelen = getline(&line, &linesize, blame->f);
3960 		if (linelen == -1) {
3961 			if (feof(blame->f)) {
3962 				s->eof = 1;
3963 				break;
3964 			}
3965 			free(line);
3966 			return got_ferror(blame->f, GOT_ERR_IO);
3967 		}
3968 		if (++lineno < s->first_displayed_line)
3969 			continue;
3970 
3971 		if (view->focussed && nprinted == s->selected_line - 1)
3972 			wstandout(view->window);
3973 
3974 		if (blame->nlines > 0) {
3975 			blame_line = &blame->lines[lineno - 1];
3976 			if (blame_line->annotated && prev_id &&
3977 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
3978 			    !(view->focussed &&
3979 			    nprinted == s->selected_line - 1)) {
3980 				waddstr(view->window, "        ");
3981 			} else if (blame_line->annotated) {
3982 				char *id_str;
3983 				err = got_object_id_str(&id_str, blame_line->id);
3984 				if (err) {
3985 					free(line);
3986 					return err;
3987 				}
3988 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
3989 				if (tc)
3990 					wattr_on(view->window,
3991 					    COLOR_PAIR(tc->colorpair), NULL);
3992 				wprintw(view->window, "%.8s", id_str);
3993 				if (tc)
3994 					wattr_off(view->window,
3995 					    COLOR_PAIR(tc->colorpair), NULL);
3996 				free(id_str);
3997 				prev_id = blame_line->id;
3998 			} else {
3999 				waddstr(view->window, "........");
4000 				prev_id = NULL;
4001 			}
4002 		} else {
4003 			waddstr(view->window, "........");
4004 			prev_id = NULL;
4005 		}
4006 
4007 		if (view->focussed && nprinted == s->selected_line - 1)
4008 			wstandend(view->window);
4009 		waddstr(view->window, " ");
4010 
4011 		if (view->ncols <= 9) {
4012 			width = 9;
4013 			wline = wcsdup(L"");
4014 			if (wline == NULL) {
4015 				err = got_error_from_errno("wcsdup");
4016 				free(line);
4017 				return err;
4018 			}
4019 		} else if (s->first_displayed_line + nprinted ==
4020 		    s->matched_line &&
4021 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4022 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4023 			    view->window, regmatch);
4024 			if (err) {
4025 				free(line);
4026 				return err;
4027 			}
4028 			width += 9;
4029 		} else {
4030 			err = format_line(&wline, &width, line,
4031 			    view->ncols - 9, 9);
4032 			waddwstr(view->window, wline);
4033 			free(wline);
4034 			wline = NULL;
4035 			width += 9;
4036 		}
4037 
4038 		if (width <= view->ncols - 1)
4039 			waddch(view->window, '\n');
4040 		if (++nprinted == 1)
4041 			s->first_displayed_line = lineno;
4042 	}
4043 	free(line);
4044 	s->last_displayed_line = lineno;
4045 
4046 	view_vborder(view);
4047 
4048 	return NULL;
4049 }
4050 
4051 static const struct got_error *
4052 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
4053 {
4054 	const struct got_error *err = NULL;
4055 	struct tog_blame_cb_args *a = arg;
4056 	struct tog_blame_line *line;
4057 	int errcode;
4058 
4059 	if (nlines != a->nlines ||
4060 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4061 		return got_error(GOT_ERR_RANGE);
4062 
4063 	errcode = pthread_mutex_lock(&tog_mutex);
4064 	if (errcode)
4065 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4066 
4067 	if (*a->quit) {	/* user has quit the blame view */
4068 		err = got_error(GOT_ERR_ITER_COMPLETED);
4069 		goto done;
4070 	}
4071 
4072 	if (lineno == -1)
4073 		goto done; /* no change in this commit */
4074 
4075 	line = &a->lines[lineno - 1];
4076 	if (line->annotated)
4077 		goto done;
4078 
4079 	line->id = got_object_id_dup(id);
4080 	if (line->id == NULL) {
4081 		err = got_error_from_errno("got_object_id_dup");
4082 		goto done;
4083 	}
4084 	line->annotated = 1;
4085 done:
4086 	errcode = pthread_mutex_unlock(&tog_mutex);
4087 	if (errcode)
4088 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4089 	return err;
4090 }
4091 
4092 static void *
4093 blame_thread(void *arg)
4094 {
4095 	const struct got_error *err;
4096 	struct tog_blame_thread_args *ta = arg;
4097 	struct tog_blame_cb_args *a = ta->cb_args;
4098 	int errcode;
4099 
4100 	err = block_signals_used_by_main_thread();
4101 	if (err)
4102 		return (void *)err;
4103 
4104 	err = got_blame(ta->path, a->commit_id, ta->repo,
4105 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4106 	if (err && err->code == GOT_ERR_CANCELLED)
4107 		err = NULL;
4108 
4109 	errcode = pthread_mutex_lock(&tog_mutex);
4110 	if (errcode)
4111 		return (void *)got_error_set_errno(errcode,
4112 		    "pthread_mutex_lock");
4113 
4114 	got_repo_close(ta->repo);
4115 	ta->repo = NULL;
4116 	*ta->complete = 1;
4117 
4118 	errcode = pthread_mutex_unlock(&tog_mutex);
4119 	if (errcode && err == NULL)
4120 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4121 
4122 	return (void *)err;
4123 }
4124 
4125 static struct got_object_id *
4126 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4127     int first_displayed_line, int selected_line)
4128 {
4129 	struct tog_blame_line *line;
4130 
4131 	if (nlines <= 0)
4132 		return NULL;
4133 
4134 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4135 	if (!line->annotated)
4136 		return NULL;
4137 
4138 	return line->id;
4139 }
4140 
4141 static const struct got_error *
4142 stop_blame(struct tog_blame *blame)
4143 {
4144 	const struct got_error *err = NULL;
4145 	int i;
4146 
4147 	if (blame->thread) {
4148 		int errcode;
4149 		errcode = pthread_mutex_unlock(&tog_mutex);
4150 		if (errcode)
4151 			return got_error_set_errno(errcode,
4152 			    "pthread_mutex_unlock");
4153 		errcode = pthread_join(blame->thread, (void **)&err);
4154 		if (errcode)
4155 			return got_error_set_errno(errcode, "pthread_join");
4156 		errcode = pthread_mutex_lock(&tog_mutex);
4157 		if (errcode)
4158 			return got_error_set_errno(errcode,
4159 			    "pthread_mutex_lock");
4160 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4161 			err = NULL;
4162 		blame->thread = NULL;
4163 	}
4164 	if (blame->thread_args.repo) {
4165 		got_repo_close(blame->thread_args.repo);
4166 		blame->thread_args.repo = NULL;
4167 	}
4168 	if (blame->f) {
4169 		if (fclose(blame->f) == EOF && err == NULL)
4170 			err = got_error_from_errno("fclose");
4171 		blame->f = NULL;
4172 	}
4173 	if (blame->lines) {
4174 		for (i = 0; i < blame->nlines; i++)
4175 			free(blame->lines[i].id);
4176 		free(blame->lines);
4177 		blame->lines = NULL;
4178 	}
4179 	free(blame->cb_args.commit_id);
4180 	blame->cb_args.commit_id = NULL;
4181 
4182 	return err;
4183 }
4184 
4185 static const struct got_error *
4186 cancel_blame_view(void *arg)
4187 {
4188 	const struct got_error *err = NULL;
4189 	int *done = arg;
4190 	int errcode;
4191 
4192 	errcode = pthread_mutex_lock(&tog_mutex);
4193 	if (errcode)
4194 		return got_error_set_errno(errcode,
4195 		    "pthread_mutex_unlock");
4196 
4197 	if (*done)
4198 		err = got_error(GOT_ERR_CANCELLED);
4199 
4200 	errcode = pthread_mutex_unlock(&tog_mutex);
4201 	if (errcode)
4202 		return got_error_set_errno(errcode,
4203 		    "pthread_mutex_lock");
4204 
4205 	return err;
4206 }
4207 
4208 static const struct got_error *
4209 run_blame(struct tog_view *view)
4210 {
4211 	struct tog_blame_view_state *s = &view->state.blame;
4212 	struct tog_blame *blame = &s->blame;
4213 	const struct got_error *err = NULL;
4214 	struct got_blob_object *blob = NULL;
4215 	struct got_repository *thread_repo = NULL;
4216 	struct got_object_id *obj_id = NULL;
4217 	int obj_type;
4218 
4219 	err = got_object_id_by_path(&obj_id, s->repo, s->blamed_commit->id,
4220 	    s->path);
4221 	if (err)
4222 		return err;
4223 
4224 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4225 	if (err)
4226 		goto done;
4227 
4228 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4229 		err = got_error(GOT_ERR_OBJ_TYPE);
4230 		goto done;
4231 	}
4232 
4233 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4234 	if (err)
4235 		goto done;
4236 	blame->f = got_opentemp();
4237 	if (blame->f == NULL) {
4238 		err = got_error_from_errno("got_opentemp");
4239 		goto done;
4240 	}
4241 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4242 	    &blame->line_offsets, blame->f, blob);
4243 	if (err)
4244 		goto done;
4245 	if (blame->nlines == 0) {
4246 		s->blame_complete = 1;
4247 		goto done;
4248 	}
4249 
4250 	/* Don't include \n at EOF in the blame line count. */
4251 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4252 		blame->nlines--;
4253 
4254 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4255 	if (blame->lines == NULL) {
4256 		err = got_error_from_errno("calloc");
4257 		goto done;
4258 	}
4259 
4260 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL);
4261 	if (err)
4262 		goto done;
4263 
4264 	blame->cb_args.view = view;
4265 	blame->cb_args.lines = blame->lines;
4266 	blame->cb_args.nlines = blame->nlines;
4267 	blame->cb_args.commit_id = got_object_id_dup(s->blamed_commit->id);
4268 	if (blame->cb_args.commit_id == NULL) {
4269 		err = got_error_from_errno("got_object_id_dup");
4270 		goto done;
4271 	}
4272 	blame->cb_args.quit = &s->done;
4273 
4274 	blame->thread_args.path = s->path;
4275 	blame->thread_args.repo = thread_repo;
4276 	blame->thread_args.cb_args = &blame->cb_args;
4277 	blame->thread_args.complete = &s->blame_complete;
4278 	blame->thread_args.cancel_cb = cancel_blame_view;
4279 	blame->thread_args.cancel_arg = &s->done;
4280 	s->blame_complete = 0;
4281 
4282 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4283 		s->first_displayed_line = 1;
4284 		s->last_displayed_line = view->nlines;
4285 		s->selected_line = 1;
4286 	}
4287 
4288 done:
4289 	if (blob)
4290 		got_object_blob_close(blob);
4291 	free(obj_id);
4292 	if (err)
4293 		stop_blame(blame);
4294 	return err;
4295 }
4296 
4297 static const struct got_error *
4298 open_blame_view(struct tog_view *view, char *path,
4299     struct got_object_id *commit_id, struct got_repository *repo)
4300 {
4301 	const struct got_error *err = NULL;
4302 	struct tog_blame_view_state *s = &view->state.blame;
4303 
4304 	SIMPLEQ_INIT(&s->blamed_commits);
4305 
4306 	s->path = strdup(path);
4307 	if (s->path == NULL)
4308 		return got_error_from_errno("strdup");
4309 
4310 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4311 	if (err) {
4312 		free(s->path);
4313 		return err;
4314 	}
4315 
4316 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4317 	s->first_displayed_line = 1;
4318 	s->last_displayed_line = view->nlines;
4319 	s->selected_line = 1;
4320 	s->blame_complete = 0;
4321 	s->repo = repo;
4322 	s->commit_id = commit_id;
4323 	memset(&s->blame, 0, sizeof(s->blame));
4324 
4325 	SIMPLEQ_INIT(&s->colors);
4326 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4327 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4328 		    get_color_value("TOG_COLOR_COMMIT"));
4329 		if (err)
4330 			return err;
4331 	}
4332 
4333 	view->show = show_blame_view;
4334 	view->input = input_blame_view;
4335 	view->close = close_blame_view;
4336 	view->search_start = search_start_blame_view;
4337 	view->search_next = search_next_blame_view;
4338 
4339 	return run_blame(view);
4340 }
4341 
4342 static const struct got_error *
4343 close_blame_view(struct tog_view *view)
4344 {
4345 	const struct got_error *err = NULL;
4346 	struct tog_blame_view_state *s = &view->state.blame;
4347 
4348 	if (s->blame.thread)
4349 		err = stop_blame(&s->blame);
4350 
4351 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
4352 		struct got_object_qid *blamed_commit;
4353 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
4354 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4355 		got_object_qid_free(blamed_commit);
4356 	}
4357 
4358 	free(s->path);
4359 	free_colors(&s->colors);
4360 
4361 	return err;
4362 }
4363 
4364 static const struct got_error *
4365 search_start_blame_view(struct tog_view *view)
4366 {
4367 	struct tog_blame_view_state *s = &view->state.blame;
4368 
4369 	s->matched_line = 0;
4370 	return NULL;
4371 }
4372 
4373 static const struct got_error *
4374 search_next_blame_view(struct tog_view *view)
4375 {
4376 	struct tog_blame_view_state *s = &view->state.blame;
4377 	int lineno;
4378 	char *line = NULL;
4379 	size_t linesize = 0;
4380 	ssize_t linelen;
4381 
4382 	if (!view->searching) {
4383 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4384 		return NULL;
4385 	}
4386 
4387 	if (s->matched_line) {
4388 		if (view->searching == TOG_SEARCH_FORWARD)
4389 			lineno = s->matched_line + 1;
4390 		else
4391 			lineno = s->matched_line - 1;
4392 	} else {
4393 		if (view->searching == TOG_SEARCH_FORWARD)
4394 			lineno = 1;
4395 		else
4396 			lineno = s->blame.nlines;
4397 	}
4398 
4399 	while (1) {
4400 		off_t offset;
4401 
4402 		if (lineno <= 0 || lineno > s->blame.nlines) {
4403 			if (s->matched_line == 0) {
4404 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4405 				break;
4406 			}
4407 
4408 			if (view->searching == TOG_SEARCH_FORWARD)
4409 				lineno = 1;
4410 			else
4411 				lineno = s->blame.nlines;
4412 		}
4413 
4414 		offset = s->blame.line_offsets[lineno - 1];
4415 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4416 			free(line);
4417 			return got_error_from_errno("fseeko");
4418 		}
4419 		linelen = getline(&line, &linesize, s->blame.f);
4420 		if (linelen != -1 &&
4421 		    match_line(line, &view->regex, 1, &view->regmatch)) {
4422 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
4423 			s->matched_line = lineno;
4424 			break;
4425 		}
4426 		if (view->searching == TOG_SEARCH_FORWARD)
4427 			lineno++;
4428 		else
4429 			lineno--;
4430 	}
4431 	free(line);
4432 
4433 	if (s->matched_line) {
4434 		s->first_displayed_line = s->matched_line;
4435 		s->selected_line = 1;
4436 	}
4437 
4438 	return NULL;
4439 }
4440 
4441 static const struct got_error *
4442 show_blame_view(struct tog_view *view)
4443 {
4444 	const struct got_error *err = NULL;
4445 	struct tog_blame_view_state *s = &view->state.blame;
4446 	int errcode;
4447 
4448 	if (s->blame.thread == NULL && !s->blame_complete) {
4449 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4450 		    &s->blame.thread_args);
4451 		if (errcode)
4452 			return got_error_set_errno(errcode, "pthread_create");
4453 
4454 		halfdelay(1); /* fast refresh while annotating  */
4455 	}
4456 
4457 	if (s->blame_complete)
4458 		halfdelay(10); /* disable fast refresh */
4459 
4460 	err = draw_blame(view);
4461 
4462 	view_vborder(view);
4463 	return err;
4464 }
4465 
4466 static const struct got_error *
4467 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4468 {
4469 	const struct got_error *err = NULL, *thread_err = NULL;
4470 	struct tog_view *diff_view;
4471 	struct tog_blame_view_state *s = &view->state.blame;
4472 	int begin_x = 0;
4473 
4474 	switch (ch) {
4475 	case 'q':
4476 		s->done = 1;
4477 		break;
4478 	case 'k':
4479 	case KEY_UP:
4480 		if (s->selected_line > 1)
4481 			s->selected_line--;
4482 		else if (s->selected_line == 1 &&
4483 		    s->first_displayed_line > 1)
4484 			s->first_displayed_line--;
4485 		break;
4486 	case KEY_PPAGE:
4487 	case CTRL('b'):
4488 		if (s->first_displayed_line == 1) {
4489 			s->selected_line = 1;
4490 			break;
4491 		}
4492 		if (s->first_displayed_line > view->nlines - 2)
4493 			s->first_displayed_line -=
4494 			    (view->nlines - 2);
4495 		else
4496 			s->first_displayed_line = 1;
4497 		break;
4498 	case 'j':
4499 	case KEY_DOWN:
4500 		if (s->selected_line < view->nlines - 2 &&
4501 		    s->first_displayed_line +
4502 		    s->selected_line <= s->blame.nlines)
4503 			s->selected_line++;
4504 		else if (s->last_displayed_line <
4505 		    s->blame.nlines)
4506 			s->first_displayed_line++;
4507 		break;
4508 	case 'b':
4509 	case 'p': {
4510 		struct got_object_id *id = NULL;
4511 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4512 		    s->first_displayed_line, s->selected_line);
4513 		if (id == NULL)
4514 			break;
4515 		if (ch == 'p') {
4516 			struct got_commit_object *commit;
4517 			struct got_object_qid *pid;
4518 			struct got_object_id *blob_id = NULL;
4519 			int obj_type;
4520 			err = got_object_open_as_commit(&commit,
4521 			    s->repo, id);
4522 			if (err)
4523 				break;
4524 			pid = SIMPLEQ_FIRST(
4525 			    got_object_commit_get_parent_ids(commit));
4526 			if (pid == NULL) {
4527 				got_object_commit_close(commit);
4528 				break;
4529 			}
4530 			/* Check if path history ends here. */
4531 			err = got_object_id_by_path(&blob_id, s->repo,
4532 			    pid->id, s->path);
4533 			if (err) {
4534 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
4535 					err = NULL;
4536 				got_object_commit_close(commit);
4537 				break;
4538 			}
4539 			err = got_object_get_type(&obj_type, s->repo,
4540 			    blob_id);
4541 			free(blob_id);
4542 			/* Can't blame non-blob type objects. */
4543 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
4544 				got_object_commit_close(commit);
4545 				break;
4546 			}
4547 			err = got_object_qid_alloc(&s->blamed_commit,
4548 			    pid->id);
4549 			got_object_commit_close(commit);
4550 		} else {
4551 			if (got_object_id_cmp(id,
4552 			    s->blamed_commit->id) == 0)
4553 				break;
4554 			err = got_object_qid_alloc(&s->blamed_commit,
4555 			    id);
4556 		}
4557 		if (err)
4558 			break;
4559 		s->done = 1;
4560 		thread_err = stop_blame(&s->blame);
4561 		s->done = 0;
4562 		if (thread_err)
4563 			break;
4564 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
4565 		    s->blamed_commit, entry);
4566 		err = run_blame(view);
4567 		if (err)
4568 			break;
4569 		break;
4570 	}
4571 	case 'B': {
4572 		struct got_object_qid *first;
4573 		first = SIMPLEQ_FIRST(&s->blamed_commits);
4574 		if (!got_object_id_cmp(first->id, s->commit_id))
4575 			break;
4576 		s->done = 1;
4577 		thread_err = stop_blame(&s->blame);
4578 		s->done = 0;
4579 		if (thread_err)
4580 			break;
4581 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4582 		got_object_qid_free(s->blamed_commit);
4583 		s->blamed_commit =
4584 		    SIMPLEQ_FIRST(&s->blamed_commits);
4585 		err = run_blame(view);
4586 		if (err)
4587 			break;
4588 		break;
4589 	}
4590 	case KEY_ENTER:
4591 	case '\r': {
4592 		struct got_object_id *id = NULL;
4593 		struct got_object_qid *pid;
4594 		struct got_commit_object *commit = NULL;
4595 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4596 		    s->first_displayed_line, s->selected_line);
4597 		if (id == NULL)
4598 			break;
4599 		err = got_object_open_as_commit(&commit, s->repo, id);
4600 		if (err)
4601 			break;
4602 		pid = SIMPLEQ_FIRST(
4603 		    got_object_commit_get_parent_ids(commit));
4604 		if (view_is_parent_view(view))
4605 		    begin_x = view_split_begin_x(view->begin_x);
4606 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
4607 		if (diff_view == NULL) {
4608 			got_object_commit_close(commit);
4609 			err = got_error_from_errno("view_open");
4610 			break;
4611 		}
4612 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
4613 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
4614 		got_object_commit_close(commit);
4615 		if (err) {
4616 			view_close(diff_view);
4617 			break;
4618 		}
4619 		view->focussed = 0;
4620 		diff_view->focussed = 1;
4621 		if (view_is_parent_view(view)) {
4622 			err = view_close_child(view);
4623 			if (err)
4624 				break;
4625 			view_set_child(view, diff_view);
4626 			view->focus_child = 1;
4627 		} else
4628 			*new_view = diff_view;
4629 		if (err)
4630 			break;
4631 		break;
4632 	}
4633 	case KEY_NPAGE:
4634 	case CTRL('f'):
4635 	case ' ':
4636 		if (s->last_displayed_line >= s->blame.nlines &&
4637 		    s->selected_line >= MIN(s->blame.nlines,
4638 		    view->nlines - 2)) {
4639 			break;
4640 		}
4641 		if (s->last_displayed_line >= s->blame.nlines &&
4642 		    s->selected_line < view->nlines - 2) {
4643 			s->selected_line = MIN(s->blame.nlines,
4644 			    view->nlines - 2);
4645 			break;
4646 		}
4647 		if (s->last_displayed_line + view->nlines - 2
4648 		    <= s->blame.nlines)
4649 			s->first_displayed_line +=
4650 			    view->nlines - 2;
4651 		else
4652 			s->first_displayed_line =
4653 			    s->blame.nlines -
4654 			    (view->nlines - 3);
4655 		break;
4656 	case KEY_RESIZE:
4657 		if (s->selected_line > view->nlines - 2) {
4658 			s->selected_line = MIN(s->blame.nlines,
4659 			    view->nlines - 2);
4660 		}
4661 		break;
4662 	default:
4663 		break;
4664 	}
4665 	return thread_err ? thread_err : err;
4666 }
4667 
4668 static const struct got_error *
4669 cmd_blame(int argc, char *argv[])
4670 {
4671 	const struct got_error *error;
4672 	struct got_repository *repo = NULL;
4673 	struct got_worktree *worktree = NULL;
4674 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4675 	char *link_target = NULL;
4676 	struct got_object_id *commit_id = NULL;
4677 	char *commit_id_str = NULL;
4678 	int ch;
4679 	struct tog_view *view;
4680 
4681 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
4682 		switch (ch) {
4683 		case 'c':
4684 			commit_id_str = optarg;
4685 			break;
4686 		case 'r':
4687 			repo_path = realpath(optarg, NULL);
4688 			if (repo_path == NULL)
4689 				return got_error_from_errno2("realpath",
4690 				    optarg);
4691 			break;
4692 		default:
4693 			usage_blame();
4694 			/* NOTREACHED */
4695 		}
4696 	}
4697 
4698 	argc -= optind;
4699 	argv += optind;
4700 
4701 	if (argc != 1)
4702 		usage_blame();
4703 
4704 	if (repo_path == NULL) {
4705 		cwd = getcwd(NULL, 0);
4706 		if (cwd == NULL)
4707 			return got_error_from_errno("getcwd");
4708 		error = got_worktree_open(&worktree, cwd);
4709 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4710 			goto done;
4711 		if (worktree)
4712 			repo_path =
4713 			    strdup(got_worktree_get_repo_path(worktree));
4714 		else
4715 			repo_path = strdup(cwd);
4716 		if (repo_path == NULL) {
4717 			error = got_error_from_errno("strdup");
4718 			goto done;
4719 		}
4720 	}
4721 
4722 	error = got_repo_open(&repo, repo_path, NULL);
4723 	if (error != NULL)
4724 		goto done;
4725 
4726 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
4727 	    worktree);
4728 	if (error)
4729 		goto done;
4730 
4731 	init_curses();
4732 
4733 	error = apply_unveil(got_repo_get_path(repo), NULL);
4734 	if (error)
4735 		goto done;
4736 
4737 	error = tog_load_refs(repo);
4738 	if (error)
4739 		goto done;
4740 
4741 	if (commit_id_str == NULL) {
4742 		struct got_reference *head_ref;
4743 		error = got_ref_open(&head_ref, repo, worktree ?
4744 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
4745 		if (error != NULL)
4746 			goto done;
4747 		error = got_ref_resolve(&commit_id, repo, head_ref);
4748 		got_ref_close(head_ref);
4749 	} else {
4750 		error = got_repo_match_object_id(&commit_id, NULL,
4751 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
4752 	}
4753 	if (error != NULL)
4754 		goto done;
4755 
4756 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
4757 	if (view == NULL) {
4758 		error = got_error_from_errno("view_open");
4759 		goto done;
4760 	}
4761 
4762 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
4763 	    commit_id, repo);
4764 	if (error)
4765 		goto done;
4766 
4767 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
4768 	    commit_id, repo);
4769 	if (error)
4770 		goto done;
4771 	if (worktree) {
4772 		/* Release work tree lock. */
4773 		got_worktree_close(worktree);
4774 		worktree = NULL;
4775 	}
4776 	error = view_loop(view);
4777 done:
4778 	free(repo_path);
4779 	free(in_repo_path);
4780 	free(link_target);
4781 	free(cwd);
4782 	free(commit_id);
4783 	if (worktree)
4784 		got_worktree_close(worktree);
4785 	if (repo)
4786 		got_repo_close(repo);
4787 	tog_free_refs();
4788 	return error;
4789 }
4790 
4791 static const struct got_error *
4792 draw_tree_entries(struct tog_view *view, const char *parent_path)
4793 {
4794 	struct tog_tree_view_state *s = &view->state.tree;
4795 	const struct got_error *err = NULL;
4796 	struct got_tree_entry *te;
4797 	wchar_t *wline;
4798 	struct tog_color *tc;
4799 	int width, n, i, nentries;
4800 	int limit = view->nlines;
4801 
4802 	s->ndisplayed = 0;
4803 
4804 	werase(view->window);
4805 
4806 	if (limit == 0)
4807 		return NULL;
4808 
4809 	err = format_line(&wline, &width, s->tree_label, view->ncols, 0);
4810 	if (err)
4811 		return err;
4812 	if (view_needs_focus_indication(view))
4813 		wstandout(view->window);
4814 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4815 	if (tc)
4816 		wattr_on(view->window,
4817 		    COLOR_PAIR(tc->colorpair), NULL);
4818 	waddwstr(view->window, wline);
4819 	if (tc)
4820 		wattr_off(view->window,
4821 		    COLOR_PAIR(tc->colorpair), NULL);
4822 	if (view_needs_focus_indication(view))
4823 		wstandend(view->window);
4824 	free(wline);
4825 	wline = NULL;
4826 	if (width < view->ncols - 1)
4827 		waddch(view->window, '\n');
4828 	if (--limit <= 0)
4829 		return NULL;
4830 	err = format_line(&wline, &width, parent_path, view->ncols, 0);
4831 	if (err)
4832 		return err;
4833 	waddwstr(view->window, wline);
4834 	free(wline);
4835 	wline = NULL;
4836 	if (width < view->ncols - 1)
4837 		waddch(view->window, '\n');
4838 	if (--limit <= 0)
4839 		return NULL;
4840 	waddch(view->window, '\n');
4841 	if (--limit <= 0)
4842 		return NULL;
4843 
4844 	if (s->first_displayed_entry == NULL) {
4845 		te = got_object_tree_get_first_entry(s->tree);
4846 		if (s->selected == 0) {
4847 			if (view->focussed)
4848 				wstandout(view->window);
4849 			s->selected_entry = NULL;
4850 		}
4851 		waddstr(view->window, "  ..\n");	/* parent directory */
4852 		if (s->selected == 0 && view->focussed)
4853 			wstandend(view->window);
4854 		s->ndisplayed++;
4855 		if (--limit <= 0)
4856 			return NULL;
4857 		n = 1;
4858 	} else {
4859 		n = 0;
4860 		te = s->first_displayed_entry;
4861 	}
4862 
4863 	nentries = got_object_tree_get_nentries(s->tree);
4864 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
4865 		char *line = NULL, *id_str = NULL, *link_target = NULL;
4866 		const char *modestr = "";
4867 		mode_t mode;
4868 
4869 		te = got_object_tree_get_entry(s->tree, i);
4870 		mode = got_tree_entry_get_mode(te);
4871 
4872 		if (s->show_ids) {
4873 			err = got_object_id_str(&id_str,
4874 			    got_tree_entry_get_id(te));
4875 			if (err)
4876 				return got_error_from_errno(
4877 				    "got_object_id_str");
4878 		}
4879 		if (got_object_tree_entry_is_submodule(te))
4880 			modestr = "$";
4881 		else if (S_ISLNK(mode)) {
4882 			int i;
4883 
4884 			err = got_tree_entry_get_symlink_target(&link_target,
4885 			    te, s->repo);
4886 			if (err) {
4887 				free(id_str);
4888 				return err;
4889 			}
4890 			for (i = 0; i < strlen(link_target); i++) {
4891 				if (!isprint((unsigned char)link_target[i]))
4892 					link_target[i] = '?';
4893 			}
4894 			modestr = "@";
4895 		}
4896 		else if (S_ISDIR(mode))
4897 			modestr = "/";
4898 		else if (mode & S_IXUSR)
4899 			modestr = "*";
4900 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
4901 		    got_tree_entry_get_name(te), modestr,
4902 		    link_target ? " -> ": "",
4903 		    link_target ? link_target : "") == -1) {
4904 			free(id_str);
4905 			free(link_target);
4906 			return got_error_from_errno("asprintf");
4907 		}
4908 		free(id_str);
4909 		free(link_target);
4910 		err = format_line(&wline, &width, line, view->ncols, 0);
4911 		if (err) {
4912 			free(line);
4913 			break;
4914 		}
4915 		if (n == s->selected) {
4916 			if (view->focussed)
4917 				wstandout(view->window);
4918 			s->selected_entry = te;
4919 		}
4920 		tc = match_color(&s->colors, line);
4921 		if (tc)
4922 			wattr_on(view->window,
4923 			    COLOR_PAIR(tc->colorpair), NULL);
4924 		waddwstr(view->window, wline);
4925 		if (tc)
4926 			wattr_off(view->window,
4927 			    COLOR_PAIR(tc->colorpair), NULL);
4928 		if (width < view->ncols - 1)
4929 			waddch(view->window, '\n');
4930 		if (n == s->selected && view->focussed)
4931 			wstandend(view->window);
4932 		free(line);
4933 		free(wline);
4934 		wline = NULL;
4935 		n++;
4936 		s->ndisplayed++;
4937 		s->last_displayed_entry = te;
4938 		if (--limit <= 0)
4939 			break;
4940 	}
4941 
4942 	return err;
4943 }
4944 
4945 static void
4946 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
4947 {
4948 	struct got_tree_entry *te;
4949 	int isroot = s->tree == s->root;
4950 	int i = 0;
4951 
4952 	if (s->first_displayed_entry == NULL)
4953 		return;
4954 
4955 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
4956 	while (i++ < maxscroll) {
4957 		if (te == NULL) {
4958 			if (!isroot)
4959 				s->first_displayed_entry = NULL;
4960 			break;
4961 		}
4962 		s->first_displayed_entry = te;
4963 		te = got_tree_entry_get_prev(s->tree, te);
4964 	}
4965 }
4966 
4967 static void
4968 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
4969 {
4970 	struct got_tree_entry *next, *last;
4971 	int n = 0;
4972 
4973 	if (s->first_displayed_entry)
4974 		next = got_tree_entry_get_next(s->tree,
4975 		    s->first_displayed_entry);
4976 	else
4977 		next = got_object_tree_get_first_entry(s->tree);
4978 
4979 	last = s->last_displayed_entry;
4980 	while (next && last && n++ < maxscroll) {
4981 		last = got_tree_entry_get_next(s->tree, last);
4982 		if (last) {
4983 			s->first_displayed_entry = next;
4984 			next = got_tree_entry_get_next(s->tree, next);
4985 		}
4986 	}
4987 }
4988 
4989 static const struct got_error *
4990 tree_entry_path(char **path, struct tog_parent_trees *parents,
4991     struct got_tree_entry *te)
4992 {
4993 	const struct got_error *err = NULL;
4994 	struct tog_parent_tree *pt;
4995 	size_t len = 2; /* for leading slash and NUL */
4996 
4997 	TAILQ_FOREACH(pt, parents, entry)
4998 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
4999 		    + 1 /* slash */;
5000 	if (te)
5001 		len += strlen(got_tree_entry_get_name(te));
5002 
5003 	*path = calloc(1, len);
5004 	if (path == NULL)
5005 		return got_error_from_errno("calloc");
5006 
5007 	(*path)[0] = '/';
5008 	pt = TAILQ_LAST(parents, tog_parent_trees);
5009 	while (pt) {
5010 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5011 		if (strlcat(*path, name, len) >= len) {
5012 			err = got_error(GOT_ERR_NO_SPACE);
5013 			goto done;
5014 		}
5015 		if (strlcat(*path, "/", len) >= len) {
5016 			err = got_error(GOT_ERR_NO_SPACE);
5017 			goto done;
5018 		}
5019 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5020 	}
5021 	if (te) {
5022 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5023 			err = got_error(GOT_ERR_NO_SPACE);
5024 			goto done;
5025 		}
5026 	}
5027 done:
5028 	if (err) {
5029 		free(*path);
5030 		*path = NULL;
5031 	}
5032 	return err;
5033 }
5034 
5035 static const struct got_error *
5036 blame_tree_entry(struct tog_view **new_view, int begin_x,
5037     struct got_tree_entry *te, struct tog_parent_trees *parents,
5038     struct got_object_id *commit_id, struct got_repository *repo)
5039 {
5040 	const struct got_error *err = NULL;
5041 	char *path;
5042 	struct tog_view *blame_view;
5043 
5044 	*new_view = NULL;
5045 
5046 	err = tree_entry_path(&path, parents, te);
5047 	if (err)
5048 		return err;
5049 
5050 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5051 	if (blame_view == NULL) {
5052 		err = got_error_from_errno("view_open");
5053 		goto done;
5054 	}
5055 
5056 	err = open_blame_view(blame_view, path, commit_id, repo);
5057 	if (err) {
5058 		if (err->code == GOT_ERR_CANCELLED)
5059 			err = NULL;
5060 		view_close(blame_view);
5061 	} else
5062 		*new_view = blame_view;
5063 done:
5064 	free(path);
5065 	return err;
5066 }
5067 
5068 static const struct got_error *
5069 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5070     struct tog_tree_view_state *s)
5071 {
5072 	struct tog_view *log_view;
5073 	const struct got_error *err = NULL;
5074 	char *path;
5075 
5076 	*new_view = NULL;
5077 
5078 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5079 	if (log_view == NULL)
5080 		return got_error_from_errno("view_open");
5081 
5082 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5083 	if (err)
5084 		return err;
5085 
5086 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5087 	    path, 0);
5088 	if (err)
5089 		view_close(log_view);
5090 	else
5091 		*new_view = log_view;
5092 	free(path);
5093 	return err;
5094 }
5095 
5096 static const struct got_error *
5097 open_tree_view(struct tog_view *view, struct got_tree_object *root,
5098     struct got_object_id *commit_id, const char *head_ref_name,
5099     struct got_repository *repo)
5100 {
5101 	const struct got_error *err = NULL;
5102 	char *commit_id_str = NULL;
5103 	struct tog_tree_view_state *s = &view->state.tree;
5104 
5105 	TAILQ_INIT(&s->parents);
5106 
5107 	err = got_object_id_str(&commit_id_str, commit_id);
5108 	if (err != NULL)
5109 		goto done;
5110 
5111 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5112 		err = got_error_from_errno("asprintf");
5113 		goto done;
5114 	}
5115 
5116 	s->root = s->tree = root;
5117 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5118 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5119 	s->commit_id = got_object_id_dup(commit_id);
5120 	if (s->commit_id == NULL) {
5121 		err = got_error_from_errno("got_object_id_dup");
5122 		goto done;
5123 	}
5124 	if (head_ref_name) {
5125 		s->head_ref_name = strdup(head_ref_name);
5126 		if (s->head_ref_name == NULL) {
5127 			err = got_error_from_errno("strdup");
5128 			goto done;
5129 		}
5130 	}
5131 	s->repo = repo;
5132 
5133 	SIMPLEQ_INIT(&s->colors);
5134 
5135 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5136 		err = add_color(&s->colors, "\\$$",
5137 		    TOG_COLOR_TREE_SUBMODULE,
5138 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5139 		if (err)
5140 			goto done;
5141 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5142 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5143 		if (err) {
5144 			free_colors(&s->colors);
5145 			goto done;
5146 		}
5147 		err = add_color(&s->colors, "/$",
5148 		    TOG_COLOR_TREE_DIRECTORY,
5149 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5150 		if (err) {
5151 			free_colors(&s->colors);
5152 			goto done;
5153 		}
5154 
5155 		err = add_color(&s->colors, "\\*$",
5156 		    TOG_COLOR_TREE_EXECUTABLE,
5157 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5158 		if (err) {
5159 			free_colors(&s->colors);
5160 			goto done;
5161 		}
5162 
5163 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5164 		    get_color_value("TOG_COLOR_COMMIT"));
5165 		if (err) {
5166 			free_colors(&s->colors);
5167 			goto done;
5168 		}
5169 	}
5170 
5171 	view->show = show_tree_view;
5172 	view->input = input_tree_view;
5173 	view->close = close_tree_view;
5174 	view->search_start = search_start_tree_view;
5175 	view->search_next = search_next_tree_view;
5176 done:
5177 	free(commit_id_str);
5178 	if (err) {
5179 		free(s->tree_label);
5180 		s->tree_label = NULL;
5181 	}
5182 	return err;
5183 }
5184 
5185 static const struct got_error *
5186 close_tree_view(struct tog_view *view)
5187 {
5188 	struct tog_tree_view_state *s = &view->state.tree;
5189 
5190 	free_colors(&s->colors);
5191 	free(s->tree_label);
5192 	s->tree_label = NULL;
5193 	free(s->commit_id);
5194 	s->commit_id = NULL;
5195 	free(s->head_ref_name);
5196 	s->head_ref_name = NULL;
5197 	while (!TAILQ_EMPTY(&s->parents)) {
5198 		struct tog_parent_tree *parent;
5199 		parent = TAILQ_FIRST(&s->parents);
5200 		TAILQ_REMOVE(&s->parents, parent, entry);
5201 		free(parent);
5202 
5203 	}
5204 	if (s->tree != s->root)
5205 		got_object_tree_close(s->tree);
5206 	got_object_tree_close(s->root);
5207 	return NULL;
5208 }
5209 
5210 static const struct got_error *
5211 search_start_tree_view(struct tog_view *view)
5212 {
5213 	struct tog_tree_view_state *s = &view->state.tree;
5214 
5215 	s->matched_entry = NULL;
5216 	return NULL;
5217 }
5218 
5219 static int
5220 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5221 {
5222 	regmatch_t regmatch;
5223 
5224 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5225 	    0) == 0;
5226 }
5227 
5228 static const struct got_error *
5229 search_next_tree_view(struct tog_view *view)
5230 {
5231 	struct tog_tree_view_state *s = &view->state.tree;
5232 	struct got_tree_entry *te = NULL;
5233 
5234 	if (!view->searching) {
5235 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5236 		return NULL;
5237 	}
5238 
5239 	if (s->matched_entry) {
5240 		if (view->searching == TOG_SEARCH_FORWARD) {
5241 			if (s->selected_entry)
5242 				te = got_tree_entry_get_next(s->tree,
5243 				    s->selected_entry);
5244 			else
5245 				te = got_object_tree_get_first_entry(s->tree);
5246 		} else {
5247 			if (s->selected_entry == NULL)
5248 				te = got_object_tree_get_last_entry(s->tree);
5249 			else
5250 				te = got_tree_entry_get_prev(s->tree,
5251 				    s->selected_entry);
5252 		}
5253 	} else {
5254 		if (view->searching == TOG_SEARCH_FORWARD)
5255 			te = got_object_tree_get_first_entry(s->tree);
5256 		else
5257 			te = got_object_tree_get_last_entry(s->tree);
5258 	}
5259 
5260 	while (1) {
5261 		if (te == NULL) {
5262 			if (s->matched_entry == NULL) {
5263 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5264 				return NULL;
5265 			}
5266 			if (view->searching == TOG_SEARCH_FORWARD)
5267 				te = got_object_tree_get_first_entry(s->tree);
5268 			else
5269 				te = got_object_tree_get_last_entry(s->tree);
5270 		}
5271 
5272 		if (match_tree_entry(te, &view->regex)) {
5273 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5274 			s->matched_entry = te;
5275 			break;
5276 		}
5277 
5278 		if (view->searching == TOG_SEARCH_FORWARD)
5279 			te = got_tree_entry_get_next(s->tree, te);
5280 		else
5281 			te = got_tree_entry_get_prev(s->tree, te);
5282 	}
5283 
5284 	if (s->matched_entry) {
5285 		s->first_displayed_entry = s->matched_entry;
5286 		s->selected = 0;
5287 	}
5288 
5289 	return NULL;
5290 }
5291 
5292 static const struct got_error *
5293 show_tree_view(struct tog_view *view)
5294 {
5295 	const struct got_error *err = NULL;
5296 	struct tog_tree_view_state *s = &view->state.tree;
5297 	char *parent_path;
5298 
5299 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5300 	if (err)
5301 		return err;
5302 
5303 	err = draw_tree_entries(view, parent_path);
5304 	free(parent_path);
5305 
5306 	view_vborder(view);
5307 	return err;
5308 }
5309 
5310 static const struct got_error *
5311 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5312 {
5313 	const struct got_error *err = NULL;
5314 	struct tog_tree_view_state *s = &view->state.tree;
5315 	struct tog_view *log_view, *ref_view;
5316 	int begin_x = 0;
5317 
5318 	switch (ch) {
5319 	case 'i':
5320 		s->show_ids = !s->show_ids;
5321 		break;
5322 	case 'l':
5323 		if (!s->selected_entry)
5324 			break;
5325 		if (view_is_parent_view(view))
5326 			begin_x = view_split_begin_x(view->begin_x);
5327 		err = log_selected_tree_entry(&log_view, begin_x, s);
5328 		view->focussed = 0;
5329 		log_view->focussed = 1;
5330 		if (view_is_parent_view(view)) {
5331 			err = view_close_child(view);
5332 			if (err)
5333 				return err;
5334 			view_set_child(view, log_view);
5335 			view->focus_child = 1;
5336 		} else
5337 			*new_view = log_view;
5338 		break;
5339 	case 'r':
5340 		if (view_is_parent_view(view))
5341 			begin_x = view_split_begin_x(view->begin_x);
5342 		ref_view = view_open(view->nlines, view->ncols,
5343 		    view->begin_y, begin_x, TOG_VIEW_REF);
5344 		if (ref_view == NULL)
5345 			return got_error_from_errno("view_open");
5346 		err = open_ref_view(ref_view, s->repo);
5347 		if (err) {
5348 			view_close(ref_view);
5349 			return err;
5350 		}
5351 		view->focussed = 0;
5352 		ref_view->focussed = 1;
5353 		if (view_is_parent_view(view)) {
5354 			err = view_close_child(view);
5355 			if (err)
5356 				return err;
5357 			view_set_child(view, ref_view);
5358 			view->focus_child = 1;
5359 		} else
5360 			*new_view = ref_view;
5361 		break;
5362 	case 'k':
5363 	case KEY_UP:
5364 		if (s->selected > 0) {
5365 			s->selected--;
5366 			break;
5367 		}
5368 		tree_scroll_up(s, 1);
5369 		break;
5370 	case KEY_PPAGE:
5371 	case CTRL('b'):
5372 		if (s->tree == s->root) {
5373 			if (got_object_tree_get_first_entry(s->tree) ==
5374 			    s->first_displayed_entry)
5375 				s->selected = 0;
5376 		} else {
5377 			if (s->first_displayed_entry == NULL)
5378 				s->selected = 0;
5379 		}
5380 		tree_scroll_up(s, MAX(0, view->nlines - 3));
5381 		break;
5382 	case 'j':
5383 	case KEY_DOWN:
5384 		if (s->selected < s->ndisplayed - 1) {
5385 			s->selected++;
5386 			break;
5387 		}
5388 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5389 		    == NULL)
5390 			/* can't scroll any further */
5391 			break;
5392 		tree_scroll_down(s, 1);
5393 		break;
5394 	case KEY_NPAGE:
5395 	case CTRL('f'):
5396 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5397 		    == NULL) {
5398 			/* can't scroll any further; move cursor down */
5399 			if (s->selected < s->ndisplayed - 1)
5400 				s->selected = s->ndisplayed - 1;
5401 			break;
5402 		}
5403 		tree_scroll_down(s, view->nlines - 3);
5404 		break;
5405 	case KEY_ENTER:
5406 	case '\r':
5407 	case KEY_BACKSPACE:
5408 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5409 			struct tog_parent_tree *parent;
5410 			/* user selected '..' */
5411 			if (s->tree == s->root)
5412 				break;
5413 			parent = TAILQ_FIRST(&s->parents);
5414 			TAILQ_REMOVE(&s->parents, parent,
5415 			    entry);
5416 			got_object_tree_close(s->tree);
5417 			s->tree = parent->tree;
5418 			s->first_displayed_entry =
5419 			    parent->first_displayed_entry;
5420 			s->selected_entry =
5421 			    parent->selected_entry;
5422 			s->selected = parent->selected;
5423 			free(parent);
5424 		} else if (S_ISDIR(got_tree_entry_get_mode(
5425 		    s->selected_entry))) {
5426 			struct got_tree_object *subtree;
5427 			err = got_object_open_as_tree(&subtree, s->repo,
5428 			    got_tree_entry_get_id(s->selected_entry));
5429 			if (err)
5430 				break;
5431 			err = tree_view_visit_subtree(s, subtree);
5432 			if (err) {
5433 				got_object_tree_close(subtree);
5434 				break;
5435 			}
5436 		} else if (S_ISREG(got_tree_entry_get_mode(
5437 		    s->selected_entry))) {
5438 			struct tog_view *blame_view;
5439 			int begin_x = view_is_parent_view(view) ?
5440 			    view_split_begin_x(view->begin_x) : 0;
5441 
5442 			err = blame_tree_entry(&blame_view, begin_x,
5443 			    s->selected_entry, &s->parents,
5444 			    s->commit_id, s->repo);
5445 			if (err)
5446 				break;
5447 			view->focussed = 0;
5448 			blame_view->focussed = 1;
5449 			if (view_is_parent_view(view)) {
5450 				err = view_close_child(view);
5451 				if (err)
5452 					return err;
5453 				view_set_child(view, blame_view);
5454 				view->focus_child = 1;
5455 			} else
5456 				*new_view = blame_view;
5457 		}
5458 		break;
5459 	case KEY_RESIZE:
5460 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
5461 			s->selected = view->nlines - 4;
5462 		break;
5463 	default:
5464 		break;
5465 	}
5466 
5467 	return err;
5468 }
5469 
5470 __dead static void
5471 usage_tree(void)
5472 {
5473 	endwin();
5474 	fprintf(stderr, "usage: %s tree [-c commit] [-r repository-path] [path]\n",
5475 	    getprogname());
5476 	exit(1);
5477 }
5478 
5479 static const struct got_error *
5480 cmd_tree(int argc, char *argv[])
5481 {
5482 	const struct got_error *error;
5483 	struct got_repository *repo = NULL;
5484 	struct got_worktree *worktree = NULL;
5485 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5486 	struct got_object_id *commit_id = NULL;
5487 	const char *commit_id_arg = NULL;
5488 	char *label = NULL;
5489 	struct got_commit_object *commit = NULL;
5490 	struct got_tree_object *tree = NULL;
5491 	struct got_reference *ref = NULL;
5492 	const char *head_ref_name = NULL;
5493 	int ch;
5494 	struct tog_view *view;
5495 
5496 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5497 		switch (ch) {
5498 		case 'c':
5499 			commit_id_arg = optarg;
5500 			break;
5501 		case 'r':
5502 			repo_path = realpath(optarg, NULL);
5503 			if (repo_path == NULL)
5504 				return got_error_from_errno2("realpath",
5505 				    optarg);
5506 			break;
5507 		default:
5508 			usage_tree();
5509 			/* NOTREACHED */
5510 		}
5511 	}
5512 
5513 	argc -= optind;
5514 	argv += optind;
5515 
5516 	if (argc > 1)
5517 		usage_tree();
5518 
5519 	if (repo_path == NULL) {
5520 		cwd = getcwd(NULL, 0);
5521 		if (cwd == NULL)
5522 			return got_error_from_errno("getcwd");
5523 		error = got_worktree_open(&worktree, cwd);
5524 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5525 			goto done;
5526 		if (worktree)
5527 			repo_path =
5528 			    strdup(got_worktree_get_repo_path(worktree));
5529 		else
5530 			repo_path = strdup(cwd);
5531 		if (repo_path == NULL) {
5532 			error = got_error_from_errno("strdup");
5533 			goto done;
5534 		}
5535 	}
5536 
5537 	error = got_repo_open(&repo, repo_path, NULL);
5538 	if (error != NULL)
5539 		goto done;
5540 
5541 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
5542 	    repo, worktree);
5543 	if (error)
5544 		goto done;
5545 
5546 	init_curses();
5547 
5548 	error = apply_unveil(got_repo_get_path(repo), NULL);
5549 	if (error)
5550 		goto done;
5551 
5552 	error = tog_load_refs(repo);
5553 	if (error)
5554 		goto done;
5555 
5556 	if (commit_id_arg == NULL) {
5557 		error = got_repo_match_object_id(&commit_id, &label,
5558 		    worktree ? got_worktree_get_head_ref_name(worktree) :
5559 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5560 		if (error)
5561 			goto done;
5562 		head_ref_name = label;
5563 	} else {
5564 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
5565 		if (error == NULL)
5566 			head_ref_name = got_ref_get_name(ref);
5567 		else if (error->code != GOT_ERR_NOT_REF)
5568 			goto done;
5569 		error = got_repo_match_object_id(&commit_id, NULL,
5570 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5571 		if (error)
5572 			goto done;
5573 	}
5574 
5575 	error = got_object_open_as_commit(&commit, repo, commit_id);
5576 	if (error)
5577 		goto done;
5578 
5579 	error = got_object_open_as_tree(&tree, repo,
5580 	    got_object_commit_get_tree_id(commit));
5581 	if (error)
5582 		goto done;
5583 
5584 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
5585 	if (view == NULL) {
5586 		error = got_error_from_errno("view_open");
5587 		goto done;
5588 	}
5589 	error = open_tree_view(view, tree, commit_id, head_ref_name, repo);
5590 	if (error)
5591 		goto done;
5592 	if (!got_path_is_root_dir(in_repo_path)) {
5593 		error = tree_view_walk_path(&view->state.tree, commit_id,
5594 		    in_repo_path);
5595 		if (error)
5596 			goto done;
5597 	}
5598 
5599 	if (worktree) {
5600 		/* Release work tree lock. */
5601 		got_worktree_close(worktree);
5602 		worktree = NULL;
5603 	}
5604 	error = view_loop(view);
5605 done:
5606 	free(repo_path);
5607 	free(cwd);
5608 	free(commit_id);
5609 	free(label);
5610 	if (ref)
5611 		got_ref_close(ref);
5612 	if (commit)
5613 		got_object_commit_close(commit);
5614 	if (tree)
5615 		got_object_tree_close(tree);
5616 	if (repo)
5617 		got_repo_close(repo);
5618 	tog_free_refs();
5619 	return error;
5620 }
5621 
5622 static const struct got_error *
5623 ref_view_load_refs(struct tog_ref_view_state *s)
5624 {
5625 	struct got_reflist_entry *sre;
5626 	struct tog_reflist_entry *re;
5627 
5628 	s->nrefs = 0;
5629 	TAILQ_FOREACH(sre, &tog_refs, entry) {
5630 		if (strncmp(got_ref_get_name(sre->ref), "refs/got/", 9) == 0)
5631 			continue;
5632 
5633 		re = malloc(sizeof(*re));
5634 		if (re == NULL)
5635 			return got_error_from_errno("malloc");
5636 
5637 		re->ref = got_ref_dup(sre->ref);
5638 		if (re->ref == NULL)
5639 			return got_error_from_errno("got_ref_dup");
5640 		re->idx = s->nrefs++;
5641 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
5642 	}
5643 
5644 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
5645 	return NULL;
5646 }
5647 
5648 void
5649 ref_view_free_refs(struct tog_ref_view_state *s)
5650 {
5651 	struct tog_reflist_entry *re;
5652 
5653 	while (!TAILQ_EMPTY(&s->refs)) {
5654 		re = TAILQ_FIRST(&s->refs);
5655 		TAILQ_REMOVE(&s->refs, re, entry);
5656 		got_ref_close(re->ref);
5657 		free(re);
5658 	}
5659 }
5660 
5661 static const struct got_error *
5662 open_ref_view(struct tog_view *view, struct got_repository *repo)
5663 {
5664 	const struct got_error *err = NULL;
5665 	struct tog_ref_view_state *s = &view->state.ref;
5666 
5667 	s->selected_entry = 0;
5668 	s->repo = repo;
5669 
5670 	TAILQ_INIT(&s->refs);
5671 	SIMPLEQ_INIT(&s->colors);
5672 
5673 	err = ref_view_load_refs(s);
5674 	if (err)
5675 		return err;
5676 
5677 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5678 		err = add_color(&s->colors, "^refs/heads/",
5679 		    TOG_COLOR_REFS_HEADS,
5680 		    get_color_value("TOG_COLOR_REFS_HEADS"));
5681 		if (err)
5682 			goto done;
5683 
5684 		err = add_color(&s->colors, "^refs/tags/",
5685 		    TOG_COLOR_REFS_TAGS,
5686 		    get_color_value("TOG_COLOR_REFS_TAGS"));
5687 		if (err)
5688 			goto done;
5689 
5690 		err = add_color(&s->colors, "^refs/remotes/",
5691 		    TOG_COLOR_REFS_REMOTES,
5692 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
5693 		if (err)
5694 			goto done;
5695 	}
5696 
5697 	view->show = show_ref_view;
5698 	view->input = input_ref_view;
5699 	view->close = close_ref_view;
5700 	view->search_start = search_start_ref_view;
5701 	view->search_next = search_next_ref_view;
5702 done:
5703 	if (err)
5704 		free_colors(&s->colors);
5705 	return err;
5706 }
5707 
5708 static const struct got_error *
5709 close_ref_view(struct tog_view *view)
5710 {
5711 	struct tog_ref_view_state *s = &view->state.ref;
5712 
5713 	ref_view_free_refs(s);
5714 	free_colors(&s->colors);
5715 
5716 	return NULL;
5717 }
5718 
5719 static const struct got_error *
5720 resolve_reflist_entry(struct got_object_id **commit_id,
5721     struct tog_reflist_entry *re, struct got_repository *repo)
5722 {
5723 	const struct got_error *err = NULL;
5724 	struct got_object_id *obj_id;
5725 	struct got_tag_object *tag = NULL;
5726 	int obj_type;
5727 
5728 	*commit_id = NULL;
5729 
5730 	err = got_ref_resolve(&obj_id, repo, re->ref);
5731 	if (err)
5732 		return err;
5733 
5734 	err = got_object_get_type(&obj_type, repo, obj_id);
5735 	if (err)
5736 		goto done;
5737 
5738 	switch (obj_type) {
5739 	case GOT_OBJ_TYPE_COMMIT:
5740 		*commit_id = obj_id;
5741 		break;
5742 	case GOT_OBJ_TYPE_TAG:
5743 		err = got_object_open_as_tag(&tag, repo, obj_id);
5744 		if (err)
5745 			goto done;
5746 		free(obj_id);
5747 		err = got_object_get_type(&obj_type, repo,
5748 		    got_object_tag_get_object_id(tag));
5749 		if (err)
5750 			goto done;
5751 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
5752 			err = got_error(GOT_ERR_OBJ_TYPE);
5753 			goto done;
5754 		}
5755 		*commit_id = got_object_id_dup(
5756 		    got_object_tag_get_object_id(tag));
5757 		if (*commit_id == NULL) {
5758 			err = got_error_from_errno("got_object_id_dup");
5759 			goto done;
5760 		}
5761 		break;
5762 	default:
5763 		err = got_error(GOT_ERR_OBJ_TYPE);
5764 		break;
5765 	}
5766 
5767 done:
5768 	if (tag)
5769 		got_object_tag_close(tag);
5770 	if (err) {
5771 		free(*commit_id);
5772 		*commit_id = NULL;
5773 	}
5774 	return err;
5775 }
5776 
5777 static const struct got_error *
5778 log_ref_entry(struct tog_view **new_view, int begin_x,
5779     struct tog_reflist_entry *re, struct got_repository *repo)
5780 {
5781 	struct tog_view *log_view;
5782 	const struct got_error *err = NULL;
5783 	struct got_object_id *commit_id = NULL;
5784 
5785 	*new_view = NULL;
5786 
5787 	err = resolve_reflist_entry(&commit_id, re, repo);
5788 	if (err) {
5789 		if (err->code != GOT_ERR_OBJ_TYPE)
5790 			return err;
5791 		else
5792 			return NULL;
5793 	}
5794 
5795 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5796 	if (log_view == NULL) {
5797 		err = got_error_from_errno("view_open");
5798 		goto done;
5799 	}
5800 
5801 	err = open_log_view(log_view, commit_id, repo,
5802 	    got_ref_get_name(re->ref), "", 0);
5803 done:
5804 	if (err)
5805 		view_close(log_view);
5806 	else
5807 		*new_view = log_view;
5808 	free(commit_id);
5809 	return err;
5810 }
5811 
5812 static void
5813 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
5814 {
5815 	struct tog_reflist_entry *re;
5816 	int i = 0;
5817 
5818 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
5819 		return;
5820 
5821 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
5822 	while (i++ < maxscroll) {
5823 		if (re == NULL)
5824 			break;
5825 		s->first_displayed_entry = re;
5826 		re = TAILQ_PREV(re, tog_reflist_head, entry);
5827 	}
5828 }
5829 
5830 static void
5831 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
5832 {
5833 	struct tog_reflist_entry *next, *last;
5834 	int n = 0;
5835 
5836 	if (s->first_displayed_entry)
5837 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
5838 	else
5839 		next = TAILQ_FIRST(&s->refs);
5840 
5841 	last = s->last_displayed_entry;
5842 	while (next && last && n++ < maxscroll) {
5843 		last = TAILQ_NEXT(last, entry);
5844 		if (last) {
5845 			s->first_displayed_entry = next;
5846 			next = TAILQ_NEXT(next, entry);
5847 		}
5848 	}
5849 }
5850 
5851 static const struct got_error *
5852 search_start_ref_view(struct tog_view *view)
5853 {
5854 	struct tog_ref_view_state *s = &view->state.ref;
5855 
5856 	s->matched_entry = NULL;
5857 	return NULL;
5858 }
5859 
5860 static int
5861 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
5862 {
5863 	regmatch_t regmatch;
5864 
5865 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
5866 	    0) == 0;
5867 }
5868 
5869 static const struct got_error *
5870 search_next_ref_view(struct tog_view *view)
5871 {
5872 	struct tog_ref_view_state *s = &view->state.ref;
5873 	struct tog_reflist_entry *re = NULL;
5874 
5875 	if (!view->searching) {
5876 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5877 		return NULL;
5878 	}
5879 
5880 	if (s->matched_entry) {
5881 		if (view->searching == TOG_SEARCH_FORWARD) {
5882 			if (s->selected_entry)
5883 				re = TAILQ_NEXT(s->selected_entry, entry);
5884 			else
5885 				re = TAILQ_PREV(s->selected_entry,
5886 				    tog_reflist_head, entry);
5887 		} else {
5888 			if (s->selected_entry == NULL)
5889 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5890 			else
5891 				re = TAILQ_PREV(s->selected_entry,
5892 				    tog_reflist_head, entry);
5893 		}
5894 	} else {
5895 		if (view->searching == TOG_SEARCH_FORWARD)
5896 			re = TAILQ_FIRST(&s->refs);
5897 		else
5898 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
5899 	}
5900 
5901 	while (1) {
5902 		if (re == NULL) {
5903 			if (s->matched_entry == NULL) {
5904 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5905 				return NULL;
5906 			}
5907 			if (view->searching == TOG_SEARCH_FORWARD)
5908 				re = TAILQ_FIRST(&s->refs);
5909 			else
5910 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5911 		}
5912 
5913 		if (match_reflist_entry(re, &view->regex)) {
5914 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5915 			s->matched_entry = re;
5916 			break;
5917 		}
5918 
5919 		if (view->searching == TOG_SEARCH_FORWARD)
5920 			re = TAILQ_NEXT(re, entry);
5921 		else
5922 			re = TAILQ_PREV(re, tog_reflist_head, entry);
5923 	}
5924 
5925 	if (s->matched_entry) {
5926 		s->first_displayed_entry = s->matched_entry;
5927 		s->selected = 0;
5928 	}
5929 
5930 	return NULL;
5931 }
5932 
5933 static const struct got_error *
5934 show_ref_view(struct tog_view *view)
5935 {
5936 	const struct got_error *err = NULL;
5937 	struct tog_ref_view_state *s = &view->state.ref;
5938 	struct tog_reflist_entry *re;
5939 	char *line = NULL;
5940 	wchar_t *wline;
5941 	struct tog_color *tc;
5942 	int width, n;
5943 	int limit = view->nlines;
5944 
5945 	werase(view->window);
5946 
5947 	s->ndisplayed = 0;
5948 
5949 	if (limit == 0)
5950 		return NULL;
5951 
5952 	re = s->first_displayed_entry;
5953 
5954 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
5955 	    s->nrefs) == -1)
5956 		return got_error_from_errno("asprintf");
5957 
5958 	err = format_line(&wline, &width, line, view->ncols, 0);
5959 	if (err) {
5960 		free(line);
5961 		return err;
5962 	}
5963 	if (view_needs_focus_indication(view))
5964 		wstandout(view->window);
5965 	waddwstr(view->window, wline);
5966 	if (view_needs_focus_indication(view))
5967 		wstandend(view->window);
5968 	free(wline);
5969 	wline = NULL;
5970 	free(line);
5971 	line = NULL;
5972 	if (width < view->ncols - 1)
5973 		waddch(view->window, '\n');
5974 	if (--limit <= 0)
5975 		return NULL;
5976 
5977 	n = 0;
5978 	while (re && limit > 0) {
5979 		char *line = NULL;
5980 
5981 		if (got_ref_is_symbolic(re->ref)) {
5982 			if (asprintf(&line, "%s -> %s",
5983 			    got_ref_get_name(re->ref),
5984 			    got_ref_get_symref_target(re->ref)) == -1)
5985 				return got_error_from_errno("asprintf");
5986 		} else if (s->show_ids) {
5987 			struct got_object_id *id;
5988 			char *id_str;
5989 			err = got_ref_resolve(&id, s->repo, re->ref);
5990 			if (err)
5991 				return err;
5992 			err = got_object_id_str(&id_str, id);
5993 			if (err) {
5994 				free(id);
5995 				return err;
5996 			}
5997 			if (asprintf(&line, "%s: %s",
5998 			    got_ref_get_name(re->ref), id_str) == -1) {
5999 				err = got_error_from_errno("asprintf");
6000 				free(id);
6001 				free(id_str);
6002 				return err;
6003 			}
6004 			free(id);
6005 			free(id_str);
6006 		} else {
6007 			line = strdup(got_ref_get_name(re->ref));
6008 			if (line == NULL)
6009 				return got_error_from_errno("strdup");
6010 		}
6011 
6012 		err = format_line(&wline, &width, line, view->ncols, 0);
6013 		if (err) {
6014 			free(line);
6015 			return err;
6016 		}
6017 		if (n == s->selected) {
6018 			if (view->focussed)
6019 				wstandout(view->window);
6020 			s->selected_entry = re;
6021 		}
6022 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6023 		if (tc)
6024 			wattr_on(view->window,
6025 			    COLOR_PAIR(tc->colorpair), NULL);
6026 		waddwstr(view->window, wline);
6027 		if (tc)
6028 			wattr_off(view->window,
6029 			    COLOR_PAIR(tc->colorpair), NULL);
6030 		if (width < view->ncols - 1)
6031 			waddch(view->window, '\n');
6032 		if (n == s->selected && view->focussed)
6033 			wstandend(view->window);
6034 		free(line);
6035 		free(wline);
6036 		wline = NULL;
6037 		n++;
6038 		s->ndisplayed++;
6039 		s->last_displayed_entry = re;
6040 
6041 		limit--;
6042 		re = TAILQ_NEXT(re, entry);
6043 	}
6044 
6045 	view_vborder(view);
6046 	return err;
6047 }
6048 
6049 static const struct got_error *
6050 browse_ref_tree(struct tog_view **new_view, int begin_x,
6051     struct tog_reflist_entry *re, struct got_repository *repo)
6052 {
6053 	const struct got_error *err = NULL;
6054 	struct got_object_id *commit_id = NULL, *tree_id = NULL;
6055 	struct got_tree_object *tree = NULL;
6056 	struct tog_view *tree_view;
6057 
6058 	*new_view = NULL;
6059 
6060 	err = resolve_reflist_entry(&commit_id, re, repo);
6061 	if (err) {
6062 		if (err->code != GOT_ERR_OBJ_TYPE)
6063 			return err;
6064 		else
6065 			return NULL;
6066 	}
6067 
6068 	err = got_object_id_by_path(&tree_id, repo, commit_id, "/");
6069 	if (err)
6070 		goto done;
6071 
6072 	err = got_object_open_as_tree(&tree, repo, tree_id);
6073 	if (err)
6074 		goto done;
6075 
6076 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6077 	if (tree_view == NULL) {
6078 		err = got_error_from_errno("view_open");
6079 		goto done;
6080 	}
6081 
6082 	err = open_tree_view(tree_view, tree, commit_id,
6083 	    got_ref_get_name(re->ref), repo);
6084 	if (err)
6085 		goto done;
6086 
6087 	*new_view = tree_view;
6088 done:
6089 	free(commit_id);
6090 	free(tree_id);
6091 	if (err) {
6092 		if (tree)
6093 			got_object_tree_close(tree);
6094 	}
6095 	return err;
6096 }
6097 static const struct got_error *
6098 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6099 {
6100 	const struct got_error *err = NULL;
6101 	struct tog_ref_view_state *s = &view->state.ref;
6102 	struct tog_view *log_view, *tree_view;
6103 	int begin_x = 0;
6104 
6105 	switch (ch) {
6106 	case 'i':
6107 		s->show_ids = !s->show_ids;
6108 		break;
6109 	case KEY_ENTER:
6110 	case '\r':
6111 		if (!s->selected_entry)
6112 			break;
6113 		if (view_is_parent_view(view))
6114 			begin_x = view_split_begin_x(view->begin_x);
6115 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6116 		    s->repo);
6117 		view->focussed = 0;
6118 		log_view->focussed = 1;
6119 		if (view_is_parent_view(view)) {
6120 			err = view_close_child(view);
6121 			if (err)
6122 				return err;
6123 			view_set_child(view, log_view);
6124 			view->focus_child = 1;
6125 		} else
6126 			*new_view = log_view;
6127 		break;
6128 	case 't':
6129 		if (!s->selected_entry)
6130 			break;
6131 		if (view_is_parent_view(view))
6132 			begin_x = view_split_begin_x(view->begin_x);
6133 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6134 		    s->repo);
6135 		if (err || tree_view == NULL)
6136 			break;
6137 		view->focussed = 0;
6138 		tree_view->focussed = 1;
6139 		if (view_is_parent_view(view)) {
6140 			err = view_close_child(view);
6141 			if (err)
6142 				return err;
6143 			view_set_child(view, tree_view);
6144 			view->focus_child = 1;
6145 		} else
6146 			*new_view = tree_view;
6147 		break;
6148 	case 'k':
6149 	case KEY_UP:
6150 		if (s->selected > 0) {
6151 			s->selected--;
6152 			break;
6153 		}
6154 		ref_scroll_up(s, 1);
6155 		break;
6156 	case KEY_PPAGE:
6157 	case CTRL('b'):
6158 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6159 			s->selected = 0;
6160 		ref_scroll_up(s, MAX(0, view->nlines - 1));
6161 		break;
6162 	case 'j':
6163 	case KEY_DOWN:
6164 		if (s->selected < s->ndisplayed - 1) {
6165 			s->selected++;
6166 			break;
6167 		}
6168 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6169 			/* can't scroll any further */
6170 			break;
6171 		ref_scroll_down(s, 1);
6172 		break;
6173 	case KEY_NPAGE:
6174 	case CTRL('f'):
6175 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6176 			/* can't scroll any further; move cursor down */
6177 			if (s->selected < s->ndisplayed - 1)
6178 				s->selected = s->ndisplayed - 1;
6179 			break;
6180 		}
6181 		ref_scroll_down(s, view->nlines - 1);
6182 		break;
6183 	case CTRL('l'):
6184 		tog_free_refs();
6185 		err = tog_load_refs(s->repo);
6186 		if (err)
6187 			break;
6188 		ref_view_free_refs(s);
6189 		err = ref_view_load_refs(s);
6190 		break;
6191 	case KEY_RESIZE:
6192 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6193 			s->selected = view->nlines - 2;
6194 		break;
6195 	default:
6196 		break;
6197 	}
6198 
6199 	return err;
6200 }
6201 
6202 __dead static void
6203 usage_ref(void)
6204 {
6205 	endwin();
6206 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6207 	    getprogname());
6208 	exit(1);
6209 }
6210 
6211 static const struct got_error *
6212 cmd_ref(int argc, char *argv[])
6213 {
6214 	const struct got_error *error;
6215 	struct got_repository *repo = NULL;
6216 	struct got_worktree *worktree = NULL;
6217 	char *cwd = NULL, *repo_path = NULL;
6218 	int ch;
6219 	struct tog_view *view;
6220 
6221 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6222 		switch (ch) {
6223 		case 'r':
6224 			repo_path = realpath(optarg, NULL);
6225 			if (repo_path == NULL)
6226 				return got_error_from_errno2("realpath",
6227 				    optarg);
6228 			break;
6229 		default:
6230 			usage_ref();
6231 			/* NOTREACHED */
6232 		}
6233 	}
6234 
6235 	argc -= optind;
6236 	argv += optind;
6237 
6238 	if (argc > 1)
6239 		usage_ref();
6240 
6241 	if (repo_path == NULL) {
6242 		cwd = getcwd(NULL, 0);
6243 		if (cwd == NULL)
6244 			return got_error_from_errno("getcwd");
6245 		error = got_worktree_open(&worktree, cwd);
6246 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6247 			goto done;
6248 		if (worktree)
6249 			repo_path =
6250 			    strdup(got_worktree_get_repo_path(worktree));
6251 		else
6252 			repo_path = strdup(cwd);
6253 		if (repo_path == NULL) {
6254 			error = got_error_from_errno("strdup");
6255 			goto done;
6256 		}
6257 	}
6258 
6259 	error = got_repo_open(&repo, repo_path, NULL);
6260 	if (error != NULL)
6261 		goto done;
6262 
6263 	init_curses();
6264 
6265 	error = apply_unveil(got_repo_get_path(repo), NULL);
6266 	if (error)
6267 		goto done;
6268 
6269 	error = tog_load_refs(repo);
6270 	if (error)
6271 		goto done;
6272 
6273 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6274 	if (view == NULL) {
6275 		error = got_error_from_errno("view_open");
6276 		goto done;
6277 	}
6278 
6279 	error = open_ref_view(view, repo);
6280 	if (error)
6281 		goto done;
6282 
6283 	if (worktree) {
6284 		/* Release work tree lock. */
6285 		got_worktree_close(worktree);
6286 		worktree = NULL;
6287 	}
6288 	error = view_loop(view);
6289 done:
6290 	free(repo_path);
6291 	free(cwd);
6292 	if (repo)
6293 		got_repo_close(repo);
6294 	tog_free_refs();
6295 	return error;
6296 }
6297 
6298 static void
6299 list_commands(FILE *fp)
6300 {
6301 	size_t i;
6302 
6303 	fprintf(fp, "commands:");
6304 	for (i = 0; i < nitems(tog_commands); i++) {
6305 		struct tog_cmd *cmd = &tog_commands[i];
6306 		fprintf(fp, " %s", cmd->name);
6307 	}
6308 	fputc('\n', fp);
6309 }
6310 
6311 __dead static void
6312 usage(int hflag, int status)
6313 {
6314 	FILE *fp = (status == 0) ? stdout : stderr;
6315 
6316 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
6317 	    getprogname());
6318 	if (hflag) {
6319 		fprintf(fp, "lazy usage: %s path\n", getprogname());
6320 		list_commands(fp);
6321 	}
6322 	exit(status);
6323 }
6324 
6325 static char **
6326 make_argv(int argc, ...)
6327 {
6328 	va_list ap;
6329 	char **argv;
6330 	int i;
6331 
6332 	va_start(ap, argc);
6333 
6334 	argv = calloc(argc, sizeof(char *));
6335 	if (argv == NULL)
6336 		err(1, "calloc");
6337 	for (i = 0; i < argc; i++) {
6338 		argv[i] = strdup(va_arg(ap, char *));
6339 		if (argv[i] == NULL)
6340 			err(1, "strdup");
6341 	}
6342 
6343 	va_end(ap);
6344 	return argv;
6345 }
6346 
6347 /*
6348  * Try to convert 'tog path' into a 'tog log path' command.
6349  * The user could simply have mistyped the command rather than knowingly
6350  * provided a path. So check whether argv[0] can in fact be resolved
6351  * to a path in the HEAD commit and print a special error if not.
6352  * This hack is for mpi@ <3
6353  */
6354 static const struct got_error *
6355 tog_log_with_path(int argc, char *argv[])
6356 {
6357 	const struct got_error *error = NULL;
6358 	struct tog_cmd *cmd = NULL;
6359 	struct got_repository *repo = NULL;
6360 	struct got_worktree *worktree = NULL;
6361 	struct got_object_id *commit_id = NULL, *id = NULL;
6362 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6363 	char *commit_id_str = NULL, **cmd_argv = NULL;
6364 
6365 	cwd = getcwd(NULL, 0);
6366 	if (cwd == NULL)
6367 		return got_error_from_errno("getcwd");
6368 
6369 	error = got_worktree_open(&worktree, cwd);
6370 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6371 		goto done;
6372 
6373 	if (worktree)
6374 		repo_path = strdup(got_worktree_get_repo_path(worktree));
6375 	else
6376 		repo_path = strdup(cwd);
6377 	if (repo_path == NULL) {
6378 		error = got_error_from_errno("strdup");
6379 		goto done;
6380 	}
6381 
6382 	error = got_repo_open(&repo, repo_path, NULL);
6383 	if (error != NULL)
6384 		goto done;
6385 
6386 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6387 	    repo, worktree);
6388 	if (error)
6389 		goto done;
6390 
6391 	error = tog_load_refs(repo);
6392 	if (error)
6393 		goto done;
6394 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
6395 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
6396 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6397 	if (error)
6398 		goto done;
6399 
6400 	if (worktree) {
6401 		got_worktree_close(worktree);
6402 		worktree = NULL;
6403 	}
6404 
6405 	error = got_object_id_by_path(&id, repo, commit_id, in_repo_path);
6406 	if (error) {
6407 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
6408 			goto done;
6409 		fprintf(stderr, "%s: '%s' is no known command or path\n",
6410 		    getprogname(), argv[0]);
6411 		usage(1, 1);
6412 		/* not reached */
6413 	}
6414 
6415 	got_repo_close(repo);
6416 	repo = NULL;
6417 
6418 	error = got_object_id_str(&commit_id_str, commit_id);
6419 	if (error)
6420 		goto done;
6421 
6422 	cmd = &tog_commands[0]; /* log */
6423 	argc = 4;
6424 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
6425 	error = cmd->cmd_main(argc, cmd_argv);
6426 done:
6427 	if (repo)
6428 		got_repo_close(repo);
6429 	if (worktree)
6430 		got_worktree_close(worktree);
6431 	free(id);
6432 	free(commit_id_str);
6433 	free(commit_id);
6434 	free(cwd);
6435 	free(repo_path);
6436 	free(in_repo_path);
6437 	if (cmd_argv) {
6438 		int i;
6439 		for (i = 0; i < argc; i++)
6440 			free(cmd_argv[i]);
6441 		free(cmd_argv);
6442 	}
6443 	tog_free_refs();
6444 	return error;
6445 }
6446 
6447 int
6448 main(int argc, char *argv[])
6449 {
6450 	const struct got_error *error = NULL;
6451 	struct tog_cmd *cmd = NULL;
6452 	int ch, hflag = 0, Vflag = 0;
6453 	char **cmd_argv = NULL;
6454 	static struct option longopts[] = {
6455 	    { "version", no_argument, NULL, 'V' },
6456 	    { NULL, 0, NULL, 0}
6457 	};
6458 
6459 	setlocale(LC_CTYPE, "");
6460 
6461 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
6462 		switch (ch) {
6463 		case 'h':
6464 			hflag = 1;
6465 			break;
6466 		case 'V':
6467 			Vflag = 1;
6468 			break;
6469 		default:
6470 			usage(hflag, 1);
6471 			/* NOTREACHED */
6472 		}
6473 	}
6474 
6475 	argc -= optind;
6476 	argv += optind;
6477 	optind = 1;
6478 	optreset = 1;
6479 
6480 	if (Vflag) {
6481 		got_version_print_str();
6482 		return 0;
6483 	}
6484 
6485 #ifndef PROFILE
6486 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
6487 	    NULL) == -1)
6488 		err(1, "pledge");
6489 #endif
6490 
6491 	if (argc == 0) {
6492 		if (hflag)
6493 			usage(hflag, 0);
6494 		/* Build an argument vector which runs a default command. */
6495 		cmd = &tog_commands[0];
6496 		argc = 1;
6497 		cmd_argv = make_argv(argc, cmd->name);
6498 	} else {
6499 		size_t i;
6500 
6501 		/* Did the user specify a command? */
6502 		for (i = 0; i < nitems(tog_commands); i++) {
6503 			if (strncmp(tog_commands[i].name, argv[0],
6504 			    strlen(argv[0])) == 0) {
6505 				cmd = &tog_commands[i];
6506 				break;
6507 			}
6508 		}
6509 	}
6510 
6511 	if (cmd == NULL) {
6512 		if (argc != 1)
6513 			usage(0, 1);
6514 		/* No command specified; try log with a path */
6515 		error = tog_log_with_path(argc, argv);
6516 	} else {
6517 		if (hflag)
6518 			cmd->cmd_usage();
6519 		else
6520 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
6521 	}
6522 
6523 	endwin();
6524 	putchar('\n');
6525 	if (cmd_argv) {
6526 		int i;
6527 		for (i = 0; i < argc; i++)
6528 			free(cmd_argv[i]);
6529 		free(cmd_argv);
6530 	}
6531 
6532 	if (error && error->code != GOT_ERR_CANCELLED)
6533 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
6534 	return 0;
6535 }