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