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