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