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 <errno.h>
22 #define _XOPEN_SOURCE_EXTENDED
23 #include <curses.h>
24 #undef _XOPEN_SOURCE_EXTENDED
25 #include <panel.h>
26 #include <locale.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdio.h>
30 #include <getopt.h>
31 #include <string.h>
32 #include <err.h>
33 #include <unistd.h>
34 #include <util.h>
35 #include <limits.h>
36 #include <wchar.h>
37 #include <time.h>
38 #include <pthread.h>
39 #include <libgen.h>
40 #include <regex.h>
41 
42 #include "got_version.h"
43 #include "got_error.h"
44 #include "got_object.h"
45 #include "got_reference.h"
46 #include "got_repository.h"
47 #include "got_diff.h"
48 #include "got_opentemp.h"
49 #include "got_utf8.h"
50 #include "got_cancel.h"
51 #include "got_commit_graph.h"
52 #include "got_blame.h"
53 #include "got_privsep.h"
54 #include "got_path.h"
55 #include "got_worktree.h"
56 
57 #ifndef MIN
58 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
59 #endif
60 
61 #ifndef MAX
62 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
63 #endif
64 
65 #define CTRL(x)		((x) & 0x1f)
66 
67 #ifndef nitems
68 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
69 #endif
70 
71 struct tog_cmd {
72 	const char *name;
73 	const struct got_error *(*cmd_main)(int, char *[]);
74 	void (*cmd_usage)(void);
75 };
76 
77 __dead static void	usage(int);
78 __dead static void	usage_log(void);
79 __dead static void	usage_diff(void);
80 __dead static void	usage_blame(void);
81 __dead static void	usage_tree(void);
82 
83 static const struct got_error*	cmd_log(int, char *[]);
84 static const struct got_error*	cmd_diff(int, char *[]);
85 static const struct got_error*	cmd_blame(int, char *[]);
86 static const struct got_error*	cmd_tree(int, char *[]);
87 
88 static struct tog_cmd tog_commands[] = {
89 	{ "log",	cmd_log,	usage_log },
90 	{ "diff",	cmd_diff,	usage_diff },
91 	{ "blame",	cmd_blame,	usage_blame },
92 	{ "tree",	cmd_tree,	usage_tree },
93 };
94 
95 enum tog_view_type {
96 	TOG_VIEW_DIFF,
97 	TOG_VIEW_LOG,
98 	TOG_VIEW_BLAME,
99 	TOG_VIEW_TREE
100 };
101 
102 #define TOG_EOF_STRING	"(END)"
103 
104 struct commit_queue_entry {
105 	TAILQ_ENTRY(commit_queue_entry) entry;
106 	struct got_object_id *id;
107 	struct got_commit_object *commit;
108 	int idx;
109 };
110 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
111 struct commit_queue {
112 	int ncommits;
113 	struct commit_queue_head head;
114 };
115 
116 struct tog_color {
117 	SIMPLEQ_ENTRY(tog_color) entry;
118 	regex_t regex;
119 	short colorpair;
120 };
121 SIMPLEQ_HEAD(tog_colors, tog_color);
122 
123 static const struct got_error *
124 add_color(struct tog_colors *colors, const char *pattern,
125     int idx, short color)
126 {
127 	const struct got_error *err = NULL;
128 	struct tog_color *tc;
129 	int regerr = 0;
130 
131 	if (idx < 1 || idx > COLOR_PAIRS - 1)
132 		return NULL;
133 
134 	init_pair(idx, color, -1);
135 
136 	tc = calloc(1, sizeof(*tc));
137 	if (tc == NULL)
138 		return got_error_from_errno("calloc");
139 	regerr = regcomp(&tc->regex, pattern,
140 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
141 	if (regerr) {
142 		static char regerr_msg[512];
143 		static char err_msg[512];
144 		regerror(regerr, &tc->regex, regerr_msg,
145 		    sizeof(regerr_msg));
146 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
147 		    regerr_msg);
148 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
149 		free(tc);
150 		return err;
151 	}
152 	tc->colorpair = idx;
153 	SIMPLEQ_INSERT_HEAD(colors, tc, entry);
154 	return NULL;
155 }
156 
157 static void
158 free_colors(struct tog_colors *colors)
159 {
160 	struct tog_color *tc;
161 
162 	while (!SIMPLEQ_EMPTY(colors)) {
163 		tc = SIMPLEQ_FIRST(colors);
164 		SIMPLEQ_REMOVE_HEAD(colors, entry);
165 		regfree(&tc->regex);
166 		free(tc);
167 	}
168 }
169 
170 struct tog_color *
171 get_color(struct tog_colors *colors, int colorpair)
172 {
173 	struct tog_color *tc = NULL;
174 
175 	SIMPLEQ_FOREACH(tc, colors, entry) {
176 		if (tc->colorpair == colorpair)
177 			return tc;
178 	}
179 
180 	return NULL;
181 }
182 
183 static int
184 default_color_value(const char *envvar)
185 {
186 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
187 		return COLOR_MAGENTA;
188 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
189 		return COLOR_CYAN;
190 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
191 		return COLOR_YELLOW;
192 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
193 		return COLOR_GREEN;
194 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
195 		return COLOR_MAGENTA;
196 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
197 		return COLOR_MAGENTA;
198 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
199 		return COLOR_CYAN;
200 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
201 		return COLOR_GREEN;
202 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
203 		return COLOR_GREEN;
204 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
205 		return COLOR_CYAN;
206 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
207 		return COLOR_YELLOW;
208 
209 	return -1;
210 }
211 
212 static int
213 get_color_value(const char *envvar)
214 {
215 	const char *val = getenv(envvar);
216 
217 	if (val == NULL)
218 		return default_color_value(envvar);
219 
220 	if (strcasecmp(val, "black") == 0)
221 		return COLOR_BLACK;
222 	if (strcasecmp(val, "red") == 0)
223 		return COLOR_RED;
224 	if (strcasecmp(val, "green") == 0)
225 		return COLOR_GREEN;
226 	if (strcasecmp(val, "yellow") == 0)
227 		return COLOR_YELLOW;
228 	if (strcasecmp(val, "blue") == 0)
229 		return COLOR_BLUE;
230 	if (strcasecmp(val, "magenta") == 0)
231 		return COLOR_MAGENTA;
232 	if (strcasecmp(val, "cyan") == 0)
233 		return COLOR_CYAN;
234 	if (strcasecmp(val, "white") == 0)
235 		return COLOR_WHITE;
236 	if (strcasecmp(val, "default") == 0)
237 		return -1;
238 
239 	return default_color_value(envvar);
240 }
241 
242 
243 struct tog_diff_view_state {
244 	struct got_object_id *id1, *id2;
245 	FILE *f;
246 	int first_displayed_line;
247 	int last_displayed_line;
248 	int eof;
249 	int diff_context;
250 	struct got_repository *repo;
251 	struct got_reflist_head *refs;
252 	struct tog_colors colors;
253 
254 	/* passed from log view; may be NULL */
255 	struct tog_view *log_view;
256 };
257 
258 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
259 
260 struct tog_log_thread_args {
261 	pthread_cond_t need_commits;
262 	int commits_needed;
263 	struct got_commit_graph *graph;
264 	struct commit_queue *commits;
265 	const char *in_repo_path;
266 	struct got_object_id *start_id;
267 	struct got_repository *repo;
268 	int log_complete;
269 	sig_atomic_t *quit;
270 	struct commit_queue_entry **first_displayed_entry;
271 	struct commit_queue_entry **selected_entry;
272 	int *searching;
273 	int *search_next_done;
274 	regex_t *regex;
275 };
276 
277 struct tog_log_view_state {
278 	struct commit_queue commits;
279 	struct commit_queue_entry *first_displayed_entry;
280 	struct commit_queue_entry *last_displayed_entry;
281 	struct commit_queue_entry *selected_entry;
282 	int selected;
283 	char *in_repo_path;
284 	const char *head_ref_name;
285 	int log_branches;
286 	struct got_repository *repo;
287 	struct got_reflist_head *refs;
288 	struct got_object_id *start_id;
289 	sig_atomic_t quit;
290 	pthread_t thread;
291 	struct tog_log_thread_args thread_args;
292 	struct commit_queue_entry *matched_entry;
293 	struct commit_queue_entry *search_entry;
294 	struct tog_colors colors;
295 };
296 
297 #define TOG_COLOR_DIFF_MINUS		1
298 #define TOG_COLOR_DIFF_PLUS		2
299 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
300 #define TOG_COLOR_DIFF_META		4
301 #define TOG_COLOR_TREE_SUBMODULE	5
302 #define TOG_COLOR_TREE_SYMLINK		6
303 #define TOG_COLOR_TREE_DIRECTORY	7
304 #define TOG_COLOR_TREE_EXECUTABLE	8
305 #define TOG_COLOR_COMMIT		9
306 #define TOG_COLOR_AUTHOR		10
307 #define TOG_COLOR_DATE		11
308 
309 struct tog_blame_cb_args {
310 	struct tog_blame_line *lines; /* one per line */
311 	int nlines;
312 
313 	struct tog_view *view;
314 	struct got_object_id *commit_id;
315 	int *quit;
316 };
317 
318 struct tog_blame_thread_args {
319 	const char *path;
320 	struct got_repository *repo;
321 	struct tog_blame_cb_args *cb_args;
322 	int *complete;
323 	got_cancel_cb cancel_cb;
324 	void *cancel_arg;
325 };
326 
327 struct tog_blame {
328 	FILE *f;
329 	size_t filesize;
330 	struct tog_blame_line *lines;
331 	int nlines;
332 	off_t *line_offsets;
333 	pthread_t thread;
334 	struct tog_blame_thread_args thread_args;
335 	struct tog_blame_cb_args cb_args;
336 	const char *path;
337 };
338 
339 struct tog_blame_view_state {
340 	int first_displayed_line;
341 	int last_displayed_line;
342 	int selected_line;
343 	int blame_complete;
344 	int eof;
345 	int done;
346 	struct got_object_id_queue blamed_commits;
347 	struct got_object_qid *blamed_commit;
348 	char *path;
349 	struct got_repository *repo;
350 	struct got_reflist_head *refs;
351 	struct got_object_id *commit_id;
352 	struct tog_blame blame;
353 	int matched_line;
354 	struct tog_colors colors;
355 };
356 
357 struct tog_parent_tree {
358 	TAILQ_ENTRY(tog_parent_tree) entry;
359 	struct got_tree_object *tree;
360 	struct got_tree_entry *first_displayed_entry;
361 	struct got_tree_entry *selected_entry;
362 	int selected;
363 };
364 
365 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
366 
367 struct tog_tree_view_state {
368 	char *tree_label;
369 	struct got_tree_object *root;
370 	struct got_tree_object *tree;
371 	struct got_tree_entry *first_displayed_entry;
372 	struct got_tree_entry *last_displayed_entry;
373 	struct got_tree_entry *selected_entry;
374 	int ndisplayed, selected, show_ids;
375 	struct tog_parent_trees parents;
376 	struct got_object_id *commit_id;
377 	struct got_repository *repo;
378 	struct got_reflist_head *refs;
379 	struct got_tree_entry *matched_entry;
380 	struct tog_colors colors;
381 };
382 
383 /*
384  * We implement two types of views: parent views and child views.
385  *
386  * The 'Tab' key switches between a parent view and its child view.
387  * Child views are shown side-by-side to their parent view, provided
388  * there is enough screen estate.
389  *
390  * When a new view is opened from within a parent view, this new view
391  * becomes a child view of the parent view, replacing any existing child.
392  *
393  * When a new view is opened from within a child view, this new view
394  * becomes a parent view which will obscure the views below until the
395  * user quits the new parent view by typing 'q'.
396  *
397  * This list of views contains parent views only.
398  * Child views are only pointed to by their parent view.
399  */
400 TAILQ_HEAD(tog_view_list_head, tog_view);
401 
402 struct tog_view {
403 	TAILQ_ENTRY(tog_view) entry;
404 	WINDOW *window;
405 	PANEL *panel;
406 	int nlines, ncols, begin_y, begin_x;
407 	int lines, cols; /* copies of LINES and COLS */
408 	int focussed;
409 	struct tog_view *parent;
410 	struct tog_view *child;
411 	int child_focussed;
412 
413 	/* type-specific state */
414 	enum tog_view_type type;
415 	union {
416 		struct tog_diff_view_state diff;
417 		struct tog_log_view_state log;
418 		struct tog_blame_view_state blame;
419 		struct tog_tree_view_state tree;
420 	} state;
421 
422 	const struct got_error *(*show)(struct tog_view *);
423 	const struct got_error *(*input)(struct tog_view **,
424 	    struct tog_view **, struct tog_view**, struct tog_view *, int);
425 	const struct got_error *(*close)(struct tog_view *);
426 
427 	const struct got_error *(*search_start)(struct tog_view *);
428 	const struct got_error *(*search_next)(struct tog_view *);
429 	int searching;
430 #define TOG_SEARCH_FORWARD	1
431 #define TOG_SEARCH_BACKWARD	2
432 	int search_next_done;
433 	regex_t regex;
434 };
435 
436 static const struct got_error *open_diff_view(struct tog_view *,
437     struct got_object_id *, struct got_object_id *, struct tog_view *,
438     struct got_reflist_head *, struct got_repository *);
439 static const struct got_error *show_diff_view(struct tog_view *);
440 static const struct got_error *input_diff_view(struct tog_view **,
441     struct tog_view **, struct tog_view **, struct tog_view *, int);
442 static const struct got_error* close_diff_view(struct tog_view *);
443 
444 static const struct got_error *open_log_view(struct tog_view *,
445     struct got_object_id *, struct got_reflist_head *,
446     struct got_repository *, const char *, const char *, int, int);
447 static const struct got_error * show_log_view(struct tog_view *);
448 static const struct got_error *input_log_view(struct tog_view **,
449     struct tog_view **, struct tog_view **, struct tog_view *, int);
450 static const struct got_error *close_log_view(struct tog_view *);
451 static const struct got_error *search_start_log_view(struct tog_view *);
452 static const struct got_error *search_next_log_view(struct tog_view *);
453 
454 static const struct got_error *open_blame_view(struct tog_view *, char *,
455     struct got_object_id *, struct got_reflist_head *, struct got_repository *);
456 static const struct got_error *show_blame_view(struct tog_view *);
457 static const struct got_error *input_blame_view(struct tog_view **,
458     struct tog_view **, struct tog_view **, struct tog_view *, int);
459 static const struct got_error *close_blame_view(struct tog_view *);
460 static const struct got_error *search_start_blame_view(struct tog_view *);
461 static const struct got_error *search_next_blame_view(struct tog_view *);
462 
463 static const struct got_error *open_tree_view(struct tog_view *,
464     struct got_tree_object *, struct got_object_id *,
465     struct got_reflist_head *, struct got_repository *);
466 static const struct got_error *show_tree_view(struct tog_view *);
467 static const struct got_error *input_tree_view(struct tog_view **,
468     struct tog_view **, struct tog_view **, struct tog_view *, int);
469 static const struct got_error *close_tree_view(struct tog_view *);
470 static const struct got_error *search_start_tree_view(struct tog_view *);
471 static const struct got_error *search_next_tree_view(struct tog_view *);
472 
473 static volatile sig_atomic_t tog_sigwinch_received;
474 static volatile sig_atomic_t tog_sigpipe_received;
475 static volatile sig_atomic_t tog_sigcont_received;
476 
477 static void
478 tog_sigwinch(int signo)
479 {
480 	tog_sigwinch_received = 1;
481 }
482 
483 static void
484 tog_sigpipe(int signo)
485 {
486 	tog_sigpipe_received = 1;
487 }
488 
489 static void
490 tog_sigcont(int signo)
491 {
492 	tog_sigcont_received = 1;
493 }
494 
495 static const struct got_error *
496 view_close(struct tog_view *view)
497 {
498 	const struct got_error *err = NULL;
499 
500 	if (view->child) {
501 		view_close(view->child);
502 		view->child = NULL;
503 	}
504 	if (view->close)
505 		err = view->close(view);
506 	if (view->panel)
507 		del_panel(view->panel);
508 	if (view->window)
509 		delwin(view->window);
510 	free(view);
511 	return err;
512 }
513 
514 static struct tog_view *
515 view_open(int nlines, int ncols, int begin_y, int begin_x,
516     enum tog_view_type type)
517 {
518 	struct tog_view *view = calloc(1, sizeof(*view));
519 
520 	if (view == NULL)
521 		return NULL;
522 
523 	view->type = type;
524 	view->lines = LINES;
525 	view->cols = COLS;
526 	view->nlines = nlines ? nlines : LINES - begin_y;
527 	view->ncols = ncols ? ncols : COLS - begin_x;
528 	view->begin_y = begin_y;
529 	view->begin_x = begin_x;
530 	view->window = newwin(nlines, ncols, begin_y, begin_x);
531 	if (view->window == NULL) {
532 		view_close(view);
533 		return NULL;
534 	}
535 	view->panel = new_panel(view->window);
536 	if (view->panel == NULL ||
537 	    set_panel_userptr(view->panel, view) != OK) {
538 		view_close(view);
539 		return NULL;
540 	}
541 
542 	keypad(view->window, TRUE);
543 	return view;
544 }
545 
546 static int
547 view_split_begin_x(int begin_x)
548 {
549 	if (begin_x > 0 || COLS < 120)
550 		return 0;
551 	return (COLS - MAX(COLS / 2, 80));
552 }
553 
554 static const struct got_error *view_resize(struct tog_view *);
555 
556 static const struct got_error *
557 view_splitscreen(struct tog_view *view)
558 {
559 	const struct got_error *err = NULL;
560 
561 	view->begin_y = 0;
562 	view->begin_x = view_split_begin_x(0);
563 	view->nlines = LINES;
564 	view->ncols = COLS - view->begin_x;
565 	view->lines = LINES;
566 	view->cols = COLS;
567 	err = view_resize(view);
568 	if (err)
569 		return err;
570 
571 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
572 		return got_error_from_errno("mvwin");
573 
574 	return NULL;
575 }
576 
577 static const struct got_error *
578 view_fullscreen(struct tog_view *view)
579 {
580 	const struct got_error *err = NULL;
581 
582 	view->begin_x = 0;
583 	view->begin_y = 0;
584 	view->nlines = LINES;
585 	view->ncols = COLS;
586 	view->lines = LINES;
587 	view->cols = COLS;
588 	err = view_resize(view);
589 	if (err)
590 		return err;
591 
592 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
593 		return got_error_from_errno("mvwin");
594 
595 	return NULL;
596 }
597 
598 static int
599 view_is_parent_view(struct tog_view *view)
600 {
601 	return view->parent == NULL;
602 }
603 
604 static const struct got_error *
605 view_resize(struct tog_view *view)
606 {
607 	int nlines, ncols;
608 
609 	if (view->lines > LINES)
610 		nlines = view->nlines - (view->lines - LINES);
611 	else
612 		nlines = view->nlines + (LINES - view->lines);
613 
614 	if (view->cols > COLS)
615 		ncols = view->ncols - (view->cols - COLS);
616 	else
617 		ncols = view->ncols + (COLS - view->cols);
618 
619 	if (wresize(view->window, nlines, ncols) == ERR)
620 		return got_error_from_errno("wresize");
621 	if (replace_panel(view->panel, view->window) == ERR)
622 		return got_error_from_errno("replace_panel");
623 	wclear(view->window);
624 
625 	view->nlines = nlines;
626 	view->ncols = ncols;
627 	view->lines = LINES;
628 	view->cols = COLS;
629 
630 	if (view->child) {
631 		view->child->begin_x = view_split_begin_x(view->begin_x);
632 		if (view->child->begin_x == 0) {
633 			view_fullscreen(view->child);
634 			if (view->child->focussed)
635 				show_panel(view->child->panel);
636 			else
637 				show_panel(view->panel);
638 		} else {
639 			view_splitscreen(view->child);
640 			show_panel(view->child->panel);
641 		}
642 	}
643 
644 	return NULL;
645 }
646 
647 static const struct got_error *
648 view_close_child(struct tog_view *view)
649 {
650 	const struct got_error *err = NULL;
651 
652 	if (view->child == NULL)
653 		return NULL;
654 
655 	err = view_close(view->child);
656 	view->child = NULL;
657 	return err;
658 }
659 
660 static const struct got_error *
661 view_set_child(struct tog_view *view, struct tog_view *child)
662 {
663 	const struct got_error *err = NULL;
664 
665 	view->child = child;
666 	child->parent = view;
667 	return err;
668 }
669 
670 static int
671 view_is_splitscreen(struct tog_view *view)
672 {
673 	return view->begin_x > 0;
674 }
675 
676 static void
677 tog_resizeterm(void)
678 {
679 	int cols, lines;
680 	struct winsize size;
681 
682 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
683 		cols = 80;     /* Default */
684 		lines = 24;
685 	} else {
686 		cols = size.ws_col;
687 		lines = size.ws_row;
688 	}
689 	resize_term(lines, cols);
690 }
691 
692 static const struct got_error *
693 view_search_start(struct tog_view *view)
694 {
695 	const struct got_error *err = NULL;
696 	char pattern[1024];
697 	int ret;
698 	int begin_x = 0;
699 
700 	if (view->nlines < 1)
701 		return NULL;
702 
703 	if (!view_is_parent_view(view))
704 		begin_x = view_split_begin_x(view->begin_x);
705 	mvwaddstr(view->window, view->begin_y + view->nlines - 1,
706 	    begin_x, "/");
707 	wclrtoeol(view->window);
708 
709 	nocbreak();
710 	echo();
711 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
712 	cbreak();
713 	noecho();
714 	if (ret == ERR)
715 		return NULL;
716 
717 	if (view->searching) {
718 		regfree(&view->regex);
719 		view->searching = 0;
720 	}
721 
722 	if (regcomp(&view->regex, pattern,
723 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE) == 0) {
724 		err = view->search_start(view);
725 		if (err) {
726 			regfree(&view->regex);
727 			return err;
728 		}
729 		view->searching = TOG_SEARCH_FORWARD;
730 		view->search_next_done = 0;
731 		view->search_next(view);
732 	}
733 
734 	return NULL;
735 }
736 
737 static const struct got_error *
738 view_input(struct tog_view **new, struct tog_view **dead,
739     struct tog_view **focus, int *done, struct tog_view *view,
740     struct tog_view_list_head *views)
741 {
742 	const struct got_error *err = NULL;
743 	struct tog_view *v;
744 	int ch, errcode;
745 
746 	*new = NULL;
747 	*dead = NULL;
748 	*focus = NULL;
749 
750 	if (view->searching && !view->search_next_done) {
751 		view->search_next(view);
752 		return NULL;
753 	}
754 
755 	nodelay(stdscr, FALSE);
756 	/* Allow threads to make progress while we are waiting for input. */
757 	errcode = pthread_mutex_unlock(&tog_mutex);
758 	if (errcode)
759 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
760 	ch = wgetch(view->window);
761 	errcode = pthread_mutex_lock(&tog_mutex);
762 	if (errcode)
763 		return got_error_set_errno(errcode, "pthread_mutex_lock");
764 	nodelay(stdscr, TRUE);
765 
766 	if (tog_sigwinch_received || tog_sigcont_received) {
767 		tog_resizeterm();
768 		tog_sigwinch_received = 0;
769 		tog_sigcont_received = 0;
770 		TAILQ_FOREACH(v, views, entry) {
771 			err = view_resize(v);
772 			if (err)
773 				return err;
774 			err = v->input(new, dead, focus, v, KEY_RESIZE);
775 			if (err)
776 				return err;
777 		}
778 	}
779 
780 	switch (ch) {
781 	case ERR:
782 		break;
783 	case '\t':
784 		if (view->child) {
785 			*focus = view->child;
786 			view->child_focussed = 1;
787 		} else if (view->parent) {
788 			*focus = view->parent;
789 			view->parent->child_focussed = 0;
790 		}
791 		break;
792 	case 'q':
793 		err = view->input(new, dead, focus, view, ch);
794 		*dead = view;
795 		break;
796 	case 'Q':
797 		*done = 1;
798 		break;
799 	case 'f':
800 		if (view_is_parent_view(view)) {
801 			if (view->child == NULL)
802 				break;
803 			if (view_is_splitscreen(view->child)) {
804 				*focus = view->child;
805 				view->child_focussed = 1;
806 				err = view_fullscreen(view->child);
807 			} else
808 				err = view_splitscreen(view->child);
809 			if (err)
810 				break;
811 			err = view->child->input(new, dead, focus,
812 			    view->child, KEY_RESIZE);
813 		} else {
814 			if (view_is_splitscreen(view)) {
815 				*focus = view;
816 				view->parent->child_focussed = 1;
817 				err = view_fullscreen(view);
818 			} else {
819 				err = view_splitscreen(view);
820 			}
821 			if (err)
822 				break;
823 			err = view->input(new, dead, focus, view,
824 			    KEY_RESIZE);
825 		}
826 		break;
827 	case KEY_RESIZE:
828 		break;
829 	case '/':
830 		if (view->search_start)
831 			view_search_start(view);
832 		else
833 			err = view->input(new, dead, focus, view, ch);
834 		break;
835 	case 'N':
836 	case 'n':
837 		if (view->search_next && view->searching) {
838 			view->searching = (ch == 'n' ?
839 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
840 			view->search_next_done = 0;
841 			view->search_next(view);
842 		} else
843 			err = view->input(new, dead, focus, view, ch);
844 		break;
845 	default:
846 		err = view->input(new, dead, focus, view, ch);
847 		break;
848 	}
849 
850 	return err;
851 }
852 
853 void
854 view_vborder(struct tog_view *view)
855 {
856 	PANEL *panel;
857 	struct tog_view *view_above;
858 
859 	if (view->parent)
860 		return view_vborder(view->parent);
861 
862 	panel = panel_above(view->panel);
863 	if (panel == NULL)
864 		return;
865 
866 	view_above = panel_userptr(panel);
867 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
868 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
869 }
870 
871 int
872 view_needs_focus_indication(struct tog_view *view)
873 {
874 	if (view_is_parent_view(view)) {
875 		if (view->child == NULL || view->child_focussed)
876 			return 0;
877 		if (!view_is_splitscreen(view->child))
878 			return 0;
879 	} else if (!view_is_splitscreen(view))
880 		return 0;
881 
882 	return view->focussed;
883 }
884 
885 static const struct got_error *
886 view_loop(struct tog_view *view)
887 {
888 	const struct got_error *err = NULL;
889 	struct tog_view_list_head views;
890 	struct tog_view *new_view, *dead_view, *focus_view, *main_view;
891 	int fast_refresh = 10;
892 	int done = 0, errcode;
893 
894 	errcode = pthread_mutex_lock(&tog_mutex);
895 	if (errcode)
896 		return got_error_set_errno(errcode, "pthread_mutex_lock");
897 
898 	TAILQ_INIT(&views);
899 	TAILQ_INSERT_HEAD(&views, view, entry);
900 
901 	main_view = view;
902 	view->focussed = 1;
903 	err = view->show(view);
904 	if (err)
905 		return err;
906 	update_panels();
907 	doupdate();
908 	while (!TAILQ_EMPTY(&views) && !done && !tog_sigpipe_received) {
909 		/* Refresh fast during initialization, then become slower. */
910 		if (fast_refresh && fast_refresh-- == 0)
911 			halfdelay(10); /* switch to once per second */
912 
913 		err = view_input(&new_view, &dead_view, &focus_view, &done,
914 		    view, &views);
915 		if (err)
916 			break;
917 		if (dead_view) {
918 			struct tog_view *prev = NULL;
919 
920 			if (view_is_parent_view(dead_view))
921 				prev = TAILQ_PREV(dead_view,
922 				    tog_view_list_head, entry);
923 			else if (view->parent != dead_view)
924 				prev = view->parent;
925 
926 			if (dead_view->parent)
927 				dead_view->parent->child = NULL;
928 			else
929 				TAILQ_REMOVE(&views, dead_view, entry);
930 
931 			err = view_close(dead_view);
932 			if (err || (dead_view == main_view && new_view == NULL))
933 				goto done;
934 
935 			if (view == dead_view) {
936 				if (focus_view)
937 					view = focus_view;
938 				else if (prev)
939 					view = prev;
940 				else if (!TAILQ_EMPTY(&views))
941 					view = TAILQ_LAST(&views,
942 					    tog_view_list_head);
943 				else
944 					view = NULL;
945 				if (view) {
946 					if (view->child && view->child_focussed)
947 						focus_view = view->child;
948 					else
949 						focus_view = view;
950 				}
951 			}
952 		}
953 		if (new_view) {
954 			struct tog_view *v, *t;
955 			/* Only allow one parent view per type. */
956 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
957 				if (v->type != new_view->type)
958 					continue;
959 				TAILQ_REMOVE(&views, v, entry);
960 				err = view_close(v);
961 				if (err)
962 					goto done;
963 				break;
964 			}
965 			TAILQ_INSERT_TAIL(&views, new_view, entry);
966 			view = new_view;
967 			if (focus_view == NULL)
968 				focus_view = new_view;
969 		}
970 		if (focus_view) {
971 			show_panel(focus_view->panel);
972 			if (view)
973 				view->focussed = 0;
974 			focus_view->focussed = 1;
975 			view = focus_view;
976 			if (new_view)
977 				show_panel(new_view->panel);
978 			if (view->child && view_is_splitscreen(view->child))
979 				show_panel(view->child->panel);
980 		}
981 		if (view) {
982 			if (focus_view == NULL) {
983 				view->focussed = 1;
984 				show_panel(view->panel);
985 				if (view->child && view_is_splitscreen(view->child))
986 					show_panel(view->child->panel);
987 				focus_view = view;
988 			}
989 			if (view->parent) {
990 				err = view->parent->show(view->parent);
991 				if (err)
992 					goto done;
993 			}
994 			err = view->show(view);
995 			if (err)
996 				goto done;
997 			if (view->child) {
998 				err = view->child->show(view->child);
999 				if (err)
1000 					goto done;
1001 			}
1002 			update_panels();
1003 			doupdate();
1004 		}
1005 	}
1006 done:
1007 	while (!TAILQ_EMPTY(&views)) {
1008 		view = TAILQ_FIRST(&views);
1009 		TAILQ_REMOVE(&views, view, entry);
1010 		view_close(view);
1011 	}
1012 
1013 	errcode = pthread_mutex_unlock(&tog_mutex);
1014 	if (errcode && err == NULL)
1015 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1016 
1017 	return err;
1018 }
1019 
1020 __dead static void
1021 usage_log(void)
1022 {
1023 	endwin();
1024 	fprintf(stderr,
1025 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1026 	    getprogname());
1027 	exit(1);
1028 }
1029 
1030 /* Create newly allocated wide-character string equivalent to a byte string. */
1031 static const struct got_error *
1032 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1033 {
1034 	char *vis = NULL;
1035 	const struct got_error *err = NULL;
1036 
1037 	*ws = NULL;
1038 	*wlen = mbstowcs(NULL, s, 0);
1039 	if (*wlen == (size_t)-1) {
1040 		int vislen;
1041 		if (errno != EILSEQ)
1042 			return got_error_from_errno("mbstowcs");
1043 
1044 		/* byte string invalid in current encoding; try to "fix" it */
1045 		err = got_mbsavis(&vis, &vislen, s);
1046 		if (err)
1047 			return err;
1048 		*wlen = mbstowcs(NULL, vis, 0);
1049 		if (*wlen == (size_t)-1) {
1050 			err = got_error_from_errno("mbstowcs"); /* give up */
1051 			goto done;
1052 		}
1053 	}
1054 
1055 	*ws = calloc(*wlen + 1, sizeof(**ws));
1056 	if (*ws == NULL) {
1057 		err = got_error_from_errno("calloc");
1058 		goto done;
1059 	}
1060 
1061 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1062 		err = got_error_from_errno("mbstowcs");
1063 done:
1064 	free(vis);
1065 	if (err) {
1066 		free(*ws);
1067 		*ws = NULL;
1068 		*wlen = 0;
1069 	}
1070 	return err;
1071 }
1072 
1073 /* Format a line for display, ensuring that it won't overflow a width limit. */
1074 static const struct got_error *
1075 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit,
1076     int col_tab_align)
1077 {
1078 	const struct got_error *err = NULL;
1079 	int cols = 0;
1080 	wchar_t *wline = NULL;
1081 	size_t wlen;
1082 	int i;
1083 
1084 	*wlinep = NULL;
1085 	*widthp = 0;
1086 
1087 	err = mbs2ws(&wline, &wlen, line);
1088 	if (err)
1089 		return err;
1090 
1091 	i = 0;
1092 	while (i < wlen) {
1093 		int width = wcwidth(wline[i]);
1094 
1095 		if (width == 0) {
1096 			i++;
1097 			continue;
1098 		}
1099 
1100 		if (width == 1 || width == 2) {
1101 			if (cols + width > wlimit)
1102 				break;
1103 			cols += width;
1104 			i++;
1105 		} else if (width == -1) {
1106 			if (wline[i] == L'\t') {
1107 				width = TABSIZE -
1108 				    ((cols + col_tab_align) % TABSIZE);
1109 				if (cols + width > wlimit)
1110 					break;
1111 				cols += width;
1112 			}
1113 			i++;
1114 		} else {
1115 			err = got_error_from_errno("wcwidth");
1116 			goto done;
1117 		}
1118 	}
1119 	wline[i] = L'\0';
1120 	if (widthp)
1121 		*widthp = cols;
1122 done:
1123 	if (err)
1124 		free(wline);
1125 	else
1126 		*wlinep = wline;
1127 	return err;
1128 }
1129 
1130 static const struct got_error*
1131 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1132     struct got_object_id *id, struct got_repository *repo)
1133 {
1134 	static const struct got_error *err = NULL;
1135 	struct got_reflist_entry *re;
1136 	char *s;
1137 	const char *name;
1138 
1139 	*refs_str = NULL;
1140 
1141 	SIMPLEQ_FOREACH(re, refs, entry) {
1142 		struct got_tag_object *tag = NULL;
1143 		int cmp;
1144 
1145 		name = got_ref_get_name(re->ref);
1146 		if (strcmp(name, GOT_REF_HEAD) == 0)
1147 			continue;
1148 		if (strncmp(name, "refs/", 5) == 0)
1149 			name += 5;
1150 		if (strncmp(name, "got/", 4) == 0)
1151 			continue;
1152 		if (strncmp(name, "heads/", 6) == 0)
1153 			name += 6;
1154 		if (strncmp(name, "remotes/", 8) == 0)
1155 			name += 8;
1156 		if (strncmp(name, "tags/", 5) == 0) {
1157 			err = got_object_open_as_tag(&tag, repo, re->id);
1158 			if (err) {
1159 				if (err->code != GOT_ERR_OBJ_TYPE)
1160 					break;
1161 				/* Ref points at something other than a tag. */
1162 				err = NULL;
1163 				tag = NULL;
1164 			}
1165 		}
1166 		cmp = got_object_id_cmp(tag ?
1167 		    got_object_tag_get_object_id(tag) : re->id, id);
1168 		if (tag)
1169 			got_object_tag_close(tag);
1170 		if (cmp != 0)
1171 			continue;
1172 		s = *refs_str;
1173 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1174 		    s ? ", " : "", name) == -1) {
1175 			err = got_error_from_errno("asprintf");
1176 			free(s);
1177 			*refs_str = NULL;
1178 			break;
1179 		}
1180 		free(s);
1181 	}
1182 
1183 	return err;
1184 }
1185 
1186 static const struct got_error *
1187 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1188     int col_tab_align)
1189 {
1190 	char *smallerthan, *at;
1191 
1192 	smallerthan = strchr(author, '<');
1193 	if (smallerthan && smallerthan[1] != '\0')
1194 		author = smallerthan + 1;
1195 	at = strchr(author, '@');
1196 	if (at)
1197 		*at = '\0';
1198 	return format_line(wauthor, author_width, author, limit, col_tab_align);
1199 }
1200 
1201 static const struct got_error *
1202 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1203     struct got_object_id *id, struct got_reflist_head *refs,
1204     const size_t date_display_cols, int author_display_cols,
1205     struct tog_colors *colors)
1206 {
1207 	const struct got_error *err = NULL;
1208 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1209 	char *logmsg0 = NULL, *logmsg = NULL;
1210 	char *author = NULL;
1211 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1212 	int author_width, logmsg_width;
1213 	char *newline, *line = NULL;
1214 	int col, limit;
1215 	const int avail = view->ncols;
1216 	struct tm tm;
1217 	time_t committer_time;
1218 	struct tog_color *tc;
1219 
1220 	committer_time = got_object_commit_get_committer_time(commit);
1221 	if (localtime_r(&committer_time, &tm) == NULL)
1222 		return got_error_from_errno("localtime_r");
1223 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm)
1224 	    >= sizeof(datebuf))
1225 		return got_error(GOT_ERR_NO_SPACE);
1226 
1227 	if (avail <= date_display_cols)
1228 		limit = MIN(sizeof(datebuf) - 1, avail);
1229 	else
1230 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1231 	tc = get_color(colors, TOG_COLOR_DATE);
1232 	if (tc)
1233 		wattr_on(view->window,
1234 		    COLOR_PAIR(tc->colorpair), NULL);
1235 	waddnstr(view->window, datebuf, limit);
1236 	if (tc)
1237 		wattr_off(view->window,
1238 		    COLOR_PAIR(tc->colorpair), NULL);
1239 	col = limit;
1240 	if (col > avail)
1241 		goto done;
1242 
1243 	if (avail >= 120) {
1244 		char *id_str;
1245 		err = got_object_id_str(&id_str, id);
1246 		if (err)
1247 			goto done;
1248 		tc = get_color(colors, TOG_COLOR_COMMIT);
1249 		if (tc)
1250 			wattr_on(view->window,
1251 			    COLOR_PAIR(tc->colorpair), NULL);
1252 		wprintw(view->window, "%.8s ", id_str);
1253 		if (tc)
1254 			wattr_off(view->window,
1255 			    COLOR_PAIR(tc->colorpair), NULL);
1256 		free(id_str);
1257 		col += 9;
1258 		if (col > avail)
1259 			goto done;
1260 	}
1261 
1262 	author = strdup(got_object_commit_get_author(commit));
1263 	if (author == NULL) {
1264 		err = got_error_from_errno("strdup");
1265 		goto done;
1266 	}
1267 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1268 	if (err)
1269 		goto done;
1270 	tc = get_color(colors, TOG_COLOR_AUTHOR);
1271 	if (tc)
1272 		wattr_on(view->window,
1273 		    COLOR_PAIR(tc->colorpair), NULL);
1274 	waddwstr(view->window, wauthor);
1275 	if (tc)
1276 		wattr_off(view->window,
1277 		    COLOR_PAIR(tc->colorpair), NULL);
1278 	col += author_width;
1279 	while (col < avail && author_width < author_display_cols + 2) {
1280 		waddch(view->window, ' ');
1281 		col++;
1282 		author_width++;
1283 	}
1284 	if (col > avail)
1285 		goto done;
1286 
1287 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1288 	if (err)
1289 		goto done;
1290 	logmsg = logmsg0;
1291 	while (*logmsg == '\n')
1292 		logmsg++;
1293 	newline = strchr(logmsg, '\n');
1294 	if (newline)
1295 		*newline = '\0';
1296 	limit = avail - col;
1297 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit, col);
1298 	if (err)
1299 		goto done;
1300 	waddwstr(view->window, wlogmsg);
1301 	col += logmsg_width;
1302 	while (col < avail) {
1303 		waddch(view->window, ' ');
1304 		col++;
1305 	}
1306 done:
1307 	free(logmsg0);
1308 	free(wlogmsg);
1309 	free(author);
1310 	free(wauthor);
1311 	free(line);
1312 	return err;
1313 }
1314 
1315 static struct commit_queue_entry *
1316 alloc_commit_queue_entry(struct got_commit_object *commit,
1317     struct got_object_id *id)
1318 {
1319 	struct commit_queue_entry *entry;
1320 
1321 	entry = calloc(1, sizeof(*entry));
1322 	if (entry == NULL)
1323 		return NULL;
1324 
1325 	entry->id = id;
1326 	entry->commit = commit;
1327 	return entry;
1328 }
1329 
1330 static void
1331 pop_commit(struct commit_queue *commits)
1332 {
1333 	struct commit_queue_entry *entry;
1334 
1335 	entry = TAILQ_FIRST(&commits->head);
1336 	TAILQ_REMOVE(&commits->head, entry, entry);
1337 	got_object_commit_close(entry->commit);
1338 	commits->ncommits--;
1339 	/* Don't free entry->id! It is owned by the commit graph. */
1340 	free(entry);
1341 }
1342 
1343 static void
1344 free_commits(struct commit_queue *commits)
1345 {
1346 	while (!TAILQ_EMPTY(&commits->head))
1347 		pop_commit(commits);
1348 }
1349 
1350 static const struct got_error *
1351 match_commit(int *have_match, struct got_object_id *id,
1352     struct got_commit_object *commit, regex_t *regex)
1353 {
1354 	const struct got_error *err = NULL;
1355 	regmatch_t regmatch;
1356 	char *id_str = NULL, *logmsg = NULL;
1357 
1358 	*have_match = 0;
1359 
1360 	err = got_object_id_str(&id_str, id);
1361 	if (err)
1362 		return err;
1363 
1364 	err = got_object_commit_get_logmsg(&logmsg, commit);
1365 	if (err)
1366 		goto done;
1367 
1368 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1369 	    &regmatch, 0) == 0 ||
1370 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1371 	    &regmatch, 0) == 0 ||
1372 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1373 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1374 		*have_match = 1;
1375 done:
1376 	free(id_str);
1377 	free(logmsg);
1378 	return err;
1379 }
1380 
1381 static const struct got_error *
1382 queue_commits(struct got_commit_graph *graph, struct commit_queue *commits,
1383     int minqueue, struct got_repository *repo, const char *path,
1384     int *searching, int *search_next_done, regex_t *regex)
1385 {
1386 	const struct got_error *err = NULL;
1387 	int nqueued = 0, have_match = 0;
1388 
1389 	/*
1390 	 * We keep all commits open throughout the lifetime of the log
1391 	 * view in order to avoid having to re-fetch commits from disk
1392 	 * while updating the display.
1393 	 */
1394 	while (nqueued < minqueue ||
1395 	    (*searching == TOG_SEARCH_FORWARD && !*search_next_done)) {
1396 		struct got_object_id *id;
1397 		struct got_commit_object *commit;
1398 		struct commit_queue_entry *entry;
1399 		int errcode;
1400 
1401 		err = got_commit_graph_iter_next(&id, graph, repo, NULL, NULL);
1402 		if (err || id == NULL)
1403 			break;
1404 
1405 		err = got_object_open_as_commit(&commit, repo, id);
1406 		if (err)
1407 			break;
1408 		entry = alloc_commit_queue_entry(commit, id);
1409 		if (entry == NULL) {
1410 			err = got_error_from_errno("alloc_commit_queue_entry");
1411 			break;
1412 		}
1413 
1414 		errcode = pthread_mutex_lock(&tog_mutex);
1415 		if (errcode) {
1416 			err = got_error_set_errno(errcode,
1417 			    "pthread_mutex_lock");
1418 			break;
1419 		}
1420 
1421 		entry->idx = commits->ncommits;
1422 		TAILQ_INSERT_TAIL(&commits->head, entry, entry);
1423 		nqueued++;
1424 		commits->ncommits++;
1425 
1426 		if (*searching == TOG_SEARCH_FORWARD && !*search_next_done) {
1427 			err = match_commit(&have_match, id, commit, regex);
1428 		}
1429 
1430 		errcode = pthread_mutex_unlock(&tog_mutex);
1431 		if (errcode && err == NULL)
1432 			err = got_error_set_errno(errcode,
1433 			    "pthread_mutex_unlock");
1434 
1435 		if (err || have_match)
1436 			break;
1437 	}
1438 
1439 	return err;
1440 }
1441 
1442 static const struct got_error *
1443 draw_commits(struct tog_view *view, struct commit_queue_entry **last,
1444     struct commit_queue_entry **selected, struct commit_queue_entry *first,
1445     struct commit_queue *commits, int selected_idx, int limit,
1446     struct got_reflist_head *refs, const char *path, int commits_needed,
1447     struct tog_colors *colors)
1448 {
1449 	const struct got_error *err = NULL;
1450 	struct tog_log_view_state *s = &view->state.log;
1451 	struct commit_queue_entry *entry;
1452 	int width;
1453 	int ncommits, author_cols = 4;
1454 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1455 	char *refs_str = NULL;
1456 	wchar_t *wline;
1457 	struct tog_color *tc;
1458 	static const size_t date_display_cols = 12;
1459 
1460 	entry = first;
1461 	ncommits = 0;
1462 	while (entry) {
1463 		if (ncommits == selected_idx) {
1464 			*selected = entry;
1465 			break;
1466 		}
1467 		entry = TAILQ_NEXT(entry, entry);
1468 		ncommits++;
1469 	}
1470 
1471 	if (*selected && !(view->searching && view->search_next_done == 0)) {
1472 		err = got_object_id_str(&id_str, (*selected)->id);
1473 		if (err)
1474 			return err;
1475 		if (refs) {
1476 			err = build_refs_str(&refs_str, refs, (*selected)->id,
1477 			    s->repo);
1478 			if (err)
1479 				goto done;
1480 		}
1481 	}
1482 
1483 	if (commits_needed == 0)
1484 		halfdelay(10); /* disable fast refresh */
1485 
1486 	if (asprintf(&ncommits_str, " [%d/%d] %s",
1487 	    entry ? entry->idx + 1 : 0, commits->ncommits,
1488 	    commits_needed > 0 ?
1489 	    (view->searching && view->search_next_done == 0
1490 	    ? "searching..." : "loading... ") :
1491 	    (refs_str ? refs_str : "")) == -1) {
1492 		err = got_error_from_errno("asprintf");
1493 		goto done;
1494 	}
1495 
1496 	if (path && strcmp(path, "/") != 0) {
1497 		if (asprintf(&header, "commit %s %s%s",
1498 		    id_str ? id_str : "........................................",
1499 		    path, ncommits_str) == -1) {
1500 			err = got_error_from_errno("asprintf");
1501 			header = NULL;
1502 			goto done;
1503 		}
1504 	} else if (asprintf(&header, "commit %s%s",
1505 	    id_str ? id_str : "........................................",
1506 	    ncommits_str) == -1) {
1507 		err = got_error_from_errno("asprintf");
1508 		header = NULL;
1509 		goto done;
1510 	}
1511 	err = format_line(&wline, &width, header, view->ncols, 0);
1512 	if (err)
1513 		goto done;
1514 
1515 	werase(view->window);
1516 
1517 	if (view_needs_focus_indication(view))
1518 		wstandout(view->window);
1519 	tc = get_color(colors, TOG_COLOR_COMMIT);
1520 	if (tc)
1521 		wattr_on(view->window,
1522 		    COLOR_PAIR(tc->colorpair), NULL);
1523 	waddwstr(view->window, wline);
1524 	if (tc)
1525 		wattr_off(view->window,
1526 		    COLOR_PAIR(tc->colorpair), NULL);
1527 	while (width < view->ncols) {
1528 		waddch(view->window, ' ');
1529 		width++;
1530 	}
1531 	if (view_needs_focus_indication(view))
1532 		wstandend(view->window);
1533 	free(wline);
1534 	if (limit <= 1)
1535 		goto done;
1536 
1537 	/* Grow author column size if necessary. */
1538 	entry = first;
1539 	ncommits = 0;
1540 	while (entry) {
1541 		char *author;
1542 		wchar_t *wauthor;
1543 		int width;
1544 		if (ncommits >= limit - 1)
1545 			break;
1546 		author = strdup(got_object_commit_get_author(entry->commit));
1547 		if (author == NULL) {
1548 			err = got_error_from_errno("strdup");
1549 			goto done;
1550 		}
1551 		err = format_author(&wauthor, &width, author, COLS,
1552 		    date_display_cols);
1553 		if (author_cols < width)
1554 			author_cols = width;
1555 		free(wauthor);
1556 		free(author);
1557 		ncommits++;
1558 		entry = TAILQ_NEXT(entry, entry);
1559 	}
1560 
1561 	entry = first;
1562 	*last = first;
1563 	ncommits = 0;
1564 	while (entry) {
1565 		if (ncommits >= limit - 1)
1566 			break;
1567 		if (ncommits == selected_idx)
1568 			wstandout(view->window);
1569 		err = draw_commit(view, entry->commit, entry->id, refs,
1570 		    date_display_cols, author_cols, colors);
1571 		if (ncommits == selected_idx)
1572 			wstandend(view->window);
1573 		if (err)
1574 			goto done;
1575 		ncommits++;
1576 		*last = entry;
1577 		entry = TAILQ_NEXT(entry, entry);
1578 	}
1579 
1580 	view_vborder(view);
1581 done:
1582 	free(id_str);
1583 	free(refs_str);
1584 	free(ncommits_str);
1585 	free(header);
1586 	return err;
1587 }
1588 
1589 static void
1590 scroll_up(struct tog_view *view,
1591     struct commit_queue_entry **first_displayed_entry, int maxscroll,
1592     struct commit_queue *commits)
1593 {
1594 	struct commit_queue_entry *entry;
1595 	int nscrolled = 0;
1596 
1597 	entry = TAILQ_FIRST(&commits->head);
1598 	if (*first_displayed_entry == entry)
1599 		return;
1600 
1601 	entry = *first_displayed_entry;
1602 	while (entry && nscrolled < maxscroll) {
1603 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1604 		if (entry) {
1605 			*first_displayed_entry = entry;
1606 			nscrolled++;
1607 		}
1608 	}
1609 }
1610 
1611 static const struct got_error *
1612 trigger_log_thread(int load_all, int *commits_needed, int *log_complete,
1613     pthread_cond_t *need_commits)
1614 {
1615 	int errcode;
1616 	int max_wait = 20;
1617 
1618 	halfdelay(1); /* fast refresh while loading commits */
1619 
1620 	while (*commits_needed > 0) {
1621 		if (*log_complete)
1622 			break;
1623 
1624 		/* Wake the log thread. */
1625 		errcode = pthread_cond_signal(need_commits);
1626 		if (errcode)
1627 			return got_error_set_errno(errcode,
1628 			    "pthread_cond_signal");
1629 		if (*commits_needed > 0 && (!load_all || --max_wait <= 0)) {
1630 			/*
1631 			 * Thread is not done yet; lose a key press
1632 			 * and let the user retry... this way the GUI
1633 			 * remains interactive while logging deep paths
1634 			 * with few commits in history.
1635 			 */
1636 			return NULL;
1637 		}
1638 	}
1639 
1640 	return NULL;
1641 }
1642 
1643 static const struct got_error *
1644 scroll_down(struct tog_view *view,
1645     struct commit_queue_entry **first_displayed_entry, int maxscroll,
1646     struct commit_queue_entry **last_displayed_entry,
1647     struct commit_queue *commits, int *log_complete, int *commits_needed,
1648     pthread_cond_t *need_commits)
1649 {
1650 	const struct got_error *err = NULL;
1651 	struct commit_queue_entry *pentry;
1652 	int nscrolled = 0;
1653 
1654 	if (*last_displayed_entry == NULL)
1655 		return NULL;
1656 
1657 	pentry = TAILQ_NEXT(*last_displayed_entry, entry);
1658 	if (pentry == NULL && !*log_complete) {
1659 		/*
1660 		 * Ask the log thread for required amount of commits
1661 		 * plus some amount of pre-fetching.
1662 		 */
1663 		(*commits_needed) += maxscroll + 20;
1664 		err = trigger_log_thread(0, commits_needed, log_complete,
1665 		    need_commits);
1666 		if (err)
1667 			return err;
1668 	}
1669 
1670 	do {
1671 		pentry = TAILQ_NEXT(*last_displayed_entry, entry);
1672 		if (pentry == NULL)
1673 			break;
1674 
1675 		*last_displayed_entry = pentry;
1676 
1677 		pentry = TAILQ_NEXT(*first_displayed_entry, entry);
1678 		if (pentry == NULL)
1679 			break;
1680 		*first_displayed_entry = pentry;
1681 	} while (++nscrolled < maxscroll);
1682 
1683 	return err;
1684 }
1685 
1686 static const struct got_error *
1687 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1688     struct got_commit_object *commit, struct got_object_id *commit_id,
1689     struct tog_view *log_view, struct got_reflist_head *refs,
1690     struct got_repository *repo)
1691 {
1692 	const struct got_error *err;
1693 	struct got_object_qid *parent_id;
1694 	struct tog_view *diff_view;
1695 
1696 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1697 	if (diff_view == NULL)
1698 		return got_error_from_errno("view_open");
1699 
1700 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1701 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1702 	    commit_id, log_view, refs, repo);
1703 	if (err == NULL)
1704 		*new_view = diff_view;
1705 	return err;
1706 }
1707 
1708 static const struct got_error *
1709 tree_view_visit_subtree(struct got_tree_object *subtree,
1710     struct tog_tree_view_state *s)
1711 {
1712 	struct tog_parent_tree *parent;
1713 
1714 	parent = calloc(1, sizeof(*parent));
1715 	if (parent == NULL)
1716 		return got_error_from_errno("calloc");
1717 
1718 	parent->tree = s->tree;
1719 	parent->first_displayed_entry = s->first_displayed_entry;
1720 	parent->selected_entry = s->selected_entry;
1721 	parent->selected = s->selected;
1722 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1723 	s->tree = subtree;
1724 	s->selected = 0;
1725 	s->first_displayed_entry = NULL;
1726 	return NULL;
1727 }
1728 
1729 
1730 static const struct got_error *
1731 browse_commit_tree(struct tog_view **new_view, int begin_x,
1732     struct commit_queue_entry *entry, const char *path,
1733     struct got_reflist_head *refs, struct got_repository *repo)
1734 {
1735 	const struct got_error *err = NULL;
1736 	struct got_tree_object *tree;
1737 	struct tog_tree_view_state *s;
1738 	struct tog_view *tree_view;
1739 	char *slash, *subpath = NULL;
1740 	const char *p;
1741 
1742 	err = got_object_open_as_tree(&tree, repo,
1743 	    got_object_commit_get_tree_id(entry->commit));
1744 	if (err)
1745 		return err;
1746 
1747 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1748 	if (tree_view == NULL)
1749 		return got_error_from_errno("view_open");
1750 
1751 	err = open_tree_view(tree_view, tree, entry->id, refs, repo);
1752 	if (err) {
1753 		got_object_tree_close(tree);
1754 		return err;
1755 	}
1756 	s = &tree_view->state.tree;
1757 
1758 	*new_view = tree_view;
1759 
1760 	if (got_path_is_root_dir(path))
1761 		return NULL;
1762 		
1763 	/* Walk the path and open corresponding tree objects. */
1764 	p = path;
1765 	while (*p) {
1766 		struct got_tree_entry *te;
1767 		struct got_object_id *tree_id;
1768 		char *te_name;
1769 
1770 		while (p[0] == '/')
1771 			p++;
1772 
1773 		/* Ensure the correct subtree entry is selected. */
1774 		slash = strchr(p, '/');
1775 		if (slash == NULL)
1776 			te_name = strdup(p);
1777 		else
1778 			te_name = strndup(p, slash - p);
1779 		if (te_name == NULL) {
1780 			err = got_error_from_errno("strndup");
1781 			break;
1782 		}
1783 		te = got_object_tree_find_entry(s->tree, te_name);
1784 		if (te == NULL) {
1785 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
1786 			free(te_name);
1787 			break;
1788 		}
1789 		free(te_name);
1790 		s->selected_entry = te;
1791 		s->selected = got_tree_entry_get_index(te);
1792 		if (s->tree != s->root)
1793 			s->selected++; /* skip '..' */
1794 
1795 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry))) {
1796 			/* Jump to this file's entry. */
1797 			s->first_displayed_entry = s->selected_entry;
1798 			s->selected = 0;
1799 			break;
1800 		}
1801 
1802 		slash = strchr(p, '/');
1803 		if (slash)
1804 			subpath = strndup(path, slash - path);
1805 		else
1806 			subpath = strdup(path);
1807 		if (subpath == NULL) {
1808 			err = got_error_from_errno("strdup");
1809 			break;
1810 		}
1811 
1812 		err = got_object_id_by_path(&tree_id, repo, entry->id,
1813 		    subpath);
1814 		if (err)
1815 			break;
1816 
1817 		err = got_object_open_as_tree(&tree, repo, tree_id);
1818 		free(tree_id);
1819 		if (err)
1820 			break;
1821 
1822 		err = tree_view_visit_subtree(tree, s);
1823 		if (err) {
1824 			got_object_tree_close(tree);
1825 			break;
1826 		}
1827 		if (slash == NULL)
1828 			break;
1829 		free(subpath);
1830 		subpath = NULL;
1831 		p = slash;
1832 	}
1833 
1834 	free(subpath);
1835 	return err;
1836 }
1837 
1838 static const struct got_error *
1839 block_signals_used_by_main_thread(void)
1840 {
1841 	sigset_t sigset;
1842 	int errcode;
1843 
1844 	if (sigemptyset(&sigset) == -1)
1845 		return got_error_from_errno("sigemptyset");
1846 
1847 	/* tog handles SIGWINCH and SIGCONT */
1848 	if (sigaddset(&sigset, SIGWINCH) == -1)
1849 		return got_error_from_errno("sigaddset");
1850 	if (sigaddset(&sigset, SIGCONT) == -1)
1851 		return got_error_from_errno("sigaddset");
1852 
1853 	/* ncurses handles SIGTSTP */
1854 	if (sigaddset(&sigset, SIGTSTP) == -1)
1855 		return got_error_from_errno("sigaddset");
1856 
1857 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
1858 	if (errcode)
1859 		return got_error_set_errno(errcode, "pthread_sigmask");
1860 
1861 	return NULL;
1862 }
1863 
1864 static void *
1865 log_thread(void *arg)
1866 {
1867 	const struct got_error *err = NULL;
1868 	int errcode = 0;
1869 	struct tog_log_thread_args *a = arg;
1870 	int done = 0;
1871 
1872 	err = block_signals_used_by_main_thread();
1873 	if (err)
1874 		return (void *)err;
1875 
1876 	while (!done && !err && !tog_sigpipe_received) {
1877 		err = queue_commits(a->graph, a->commits, 1, a->repo,
1878 		    a->in_repo_path, a->searching, a->search_next_done,
1879 		    a->regex);
1880 		if (err) {
1881 			if (err->code != GOT_ERR_ITER_COMPLETED)
1882 				return (void *)err;
1883 			err = NULL;
1884 			done = 1;
1885 		} else if (a->commits_needed > 0)
1886 			a->commits_needed--;
1887 
1888 		errcode = pthread_mutex_lock(&tog_mutex);
1889 		if (errcode) {
1890 			err = got_error_set_errno(errcode,
1891 			    "pthread_mutex_lock");
1892 			break;
1893 		} else if (*a->quit)
1894 			done = 1;
1895 		else if (*a->first_displayed_entry == NULL) {
1896 			*a->first_displayed_entry =
1897 			    TAILQ_FIRST(&a->commits->head);
1898 			*a->selected_entry = *a->first_displayed_entry;
1899 		}
1900 
1901 		if (done)
1902 			a->commits_needed = 0;
1903 		else if (a->commits_needed == 0) {
1904 			errcode = pthread_cond_wait(&a->need_commits,
1905 			    &tog_mutex);
1906 			if (errcode)
1907 				err = got_error_set_errno(errcode,
1908 				    "pthread_cond_wait");
1909 		}
1910 
1911 		errcode = pthread_mutex_unlock(&tog_mutex);
1912 		if (errcode && err == NULL)
1913 			err = got_error_set_errno(errcode,
1914 			    "pthread_mutex_unlock");
1915 	}
1916 	a->log_complete = 1;
1917 	return (void *)err;
1918 }
1919 
1920 static const struct got_error *
1921 stop_log_thread(struct tog_log_view_state *s)
1922 {
1923 	const struct got_error *err = NULL;
1924 	int errcode;
1925 
1926 	if (s->thread) {
1927 		s->quit = 1;
1928 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
1929 		if (errcode)
1930 			return got_error_set_errno(errcode,
1931 			    "pthread_cond_signal");
1932 		errcode = pthread_mutex_unlock(&tog_mutex);
1933 		if (errcode)
1934 			return got_error_set_errno(errcode,
1935 			    "pthread_mutex_unlock");
1936 		errcode = pthread_join(s->thread, (void **)&err);
1937 		if (errcode)
1938 			return got_error_set_errno(errcode, "pthread_join");
1939 		errcode = pthread_mutex_lock(&tog_mutex);
1940 		if (errcode)
1941 			return got_error_set_errno(errcode,
1942 			    "pthread_mutex_lock");
1943 		s->thread = NULL;
1944 	}
1945 
1946 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
1947 	if (errcode && err == NULL)
1948 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
1949 
1950 	if (s->thread_args.repo) {
1951 		got_repo_close(s->thread_args.repo);
1952 		s->thread_args.repo = NULL;
1953 	}
1954 
1955 	if (s->thread_args.graph) {
1956 		got_commit_graph_close(s->thread_args.graph);
1957 		s->thread_args.graph = NULL;
1958 	}
1959 
1960 	return err;
1961 }
1962 
1963 static const struct got_error *
1964 close_log_view(struct tog_view *view)
1965 {
1966 	const struct got_error *err = NULL;
1967 	struct tog_log_view_state *s = &view->state.log;
1968 
1969 	err = stop_log_thread(s);
1970 	free_commits(&s->commits);
1971 	free(s->in_repo_path);
1972 	s->in_repo_path = NULL;
1973 	free(s->start_id);
1974 	s->start_id = NULL;
1975 	return err;
1976 }
1977 
1978 static const struct got_error *
1979 search_start_log_view(struct tog_view *view)
1980 {
1981 	struct tog_log_view_state *s = &view->state.log;
1982 
1983 	s->matched_entry = NULL;
1984 	s->search_entry = NULL;
1985 	return NULL;
1986 }
1987 
1988 static const struct got_error *
1989 search_next_log_view(struct tog_view *view)
1990 {
1991 	const struct got_error *err = NULL;
1992 	struct tog_log_view_state *s = &view->state.log;
1993 	struct commit_queue_entry *entry;
1994 
1995 	if (!view->searching) {
1996 		view->search_next_done = 1;
1997 		return NULL;
1998 	}
1999 
2000 	if (s->search_entry) {
2001 		int errcode, ch;
2002 		errcode = pthread_mutex_unlock(&tog_mutex);
2003 		if (errcode)
2004 			return got_error_set_errno(errcode,
2005 			    "pthread_mutex_unlock");
2006 		ch = wgetch(view->window);
2007 		errcode = pthread_mutex_lock(&tog_mutex);
2008 		if (errcode)
2009 			return got_error_set_errno(errcode,
2010 			    "pthread_mutex_lock");
2011 		if (ch == KEY_BACKSPACE) {
2012 			view->search_next_done = 1;
2013 			return NULL;
2014 		}
2015 		if (view->searching == TOG_SEARCH_FORWARD)
2016 			entry = TAILQ_NEXT(s->search_entry, entry);
2017 		else
2018 			entry = TAILQ_PREV(s->search_entry,
2019 			    commit_queue_head, entry);
2020 	} else if (s->matched_entry) {
2021 		if (view->searching == TOG_SEARCH_FORWARD)
2022 			entry = TAILQ_NEXT(s->selected_entry, entry);
2023 		else
2024 			entry = TAILQ_PREV(s->selected_entry,
2025 			    commit_queue_head, entry);
2026 	} else {
2027 		if (view->searching == TOG_SEARCH_FORWARD)
2028 			entry = TAILQ_FIRST(&s->commits.head);
2029 		else
2030 			entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2031 	}
2032 
2033 	while (1) {
2034 		int have_match = 0;
2035 
2036 		if (entry == NULL) {
2037 			if (s->thread_args.log_complete ||
2038 			    view->searching == TOG_SEARCH_BACKWARD) {
2039 				view->search_next_done = 1;
2040 				return NULL;
2041 			}
2042 			/*
2043 			 * Poke the log thread for more commits and return,
2044 			 * allowing the main loop to make progress. Search
2045 			 * will resume at s->search_entry once we come back.
2046 			 */
2047 			s->thread_args.commits_needed++;
2048 			return trigger_log_thread(1,
2049 			    &s->thread_args.commits_needed,
2050 			    &s->thread_args.log_complete,
2051 			    &s->thread_args.need_commits);
2052 		}
2053 
2054 		err = match_commit(&have_match, entry->id, entry->commit,
2055 		    &view->regex);
2056 		if (err)
2057 			break;
2058 		if (have_match) {
2059 			view->search_next_done = 1;
2060 			s->matched_entry = entry;
2061 			break;
2062 		}
2063 
2064 		s->search_entry = entry;
2065 		if (view->searching == TOG_SEARCH_FORWARD)
2066 			entry = TAILQ_NEXT(entry, entry);
2067 		else
2068 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2069 	}
2070 
2071 	if (s->matched_entry) {
2072 		int cur = s->selected_entry->idx;
2073 		while (cur < s->matched_entry->idx) {
2074 			err = input_log_view(NULL, NULL, NULL, view, KEY_DOWN);
2075 			if (err)
2076 				return err;
2077 			cur++;
2078 		}
2079 		while (cur > s->matched_entry->idx) {
2080 			err = input_log_view(NULL, NULL, NULL, view, KEY_UP);
2081 			if (err)
2082 				return err;
2083 			cur--;
2084 		}
2085 	}
2086 
2087 	s->search_entry = NULL;
2088 
2089 	return NULL;
2090 }
2091 
2092 static const struct got_error *
2093 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2094     struct got_reflist_head *refs, struct got_repository *repo,
2095     const char *head_ref_name, const char *path, int check_disk,
2096     int log_branches)
2097 {
2098 	const struct got_error *err = NULL;
2099 	struct tog_log_view_state *s = &view->state.log;
2100 	struct got_repository *thread_repo = NULL;
2101 	struct got_commit_graph *thread_graph = NULL;
2102 	int errcode;
2103 
2104 	err = got_repo_map_path(&s->in_repo_path, repo, path, check_disk);
2105 	if (err != NULL)
2106 		goto done;
2107 
2108 	/* The commit queue only contains commits being displayed. */
2109 	TAILQ_INIT(&s->commits.head);
2110 	s->commits.ncommits = 0;
2111 
2112 	s->refs = refs;
2113 	s->repo = repo;
2114 	s->head_ref_name = head_ref_name;
2115 	s->start_id = got_object_id_dup(start_id);
2116 	if (s->start_id == NULL) {
2117 		err = got_error_from_errno("got_object_id_dup");
2118 		goto done;
2119 	}
2120 	s->log_branches = log_branches;
2121 
2122 	SIMPLEQ_INIT(&s->colors);
2123 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2124 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2125 		    get_color_value("TOG_COLOR_COMMIT"));
2126 		if (err)
2127 			goto done;
2128 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2129 		    get_color_value("TOG_COLOR_AUTHOR"));
2130 		if (err) {
2131 			free_colors(&s->colors);
2132 			goto done;
2133 		}
2134 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2135 		    get_color_value("TOG_COLOR_DATE"));
2136 		if (err) {
2137 			free_colors(&s->colors);
2138 			goto done;
2139 		}
2140 	}
2141 
2142 	view->show = show_log_view;
2143 	view->input = input_log_view;
2144 	view->close = close_log_view;
2145 	view->search_start = search_start_log_view;
2146 	view->search_next = search_next_log_view;
2147 
2148 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL);
2149 	if (err)
2150 		goto done;
2151 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2152 	    !s->log_branches);
2153 	if (err)
2154 		goto done;
2155 	err = got_commit_graph_iter_start(thread_graph,
2156 	     s->start_id, s->repo, NULL, NULL);
2157 	if (err)
2158 		goto done;
2159 
2160 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2161 	if (errcode) {
2162 		err = got_error_set_errno(errcode, "pthread_cond_init");
2163 		goto done;
2164 	}
2165 
2166 	s->thread_args.commits_needed = view->nlines;
2167 	s->thread_args.graph = thread_graph;
2168 	s->thread_args.commits = &s->commits;
2169 	s->thread_args.in_repo_path = s->in_repo_path;
2170 	s->thread_args.start_id = s->start_id;
2171 	s->thread_args.repo = thread_repo;
2172 	s->thread_args.log_complete = 0;
2173 	s->thread_args.quit = &s->quit;
2174 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2175 	s->thread_args.selected_entry = &s->selected_entry;
2176 	s->thread_args.searching = &view->searching;
2177 	s->thread_args.search_next_done = &view->search_next_done;
2178 	s->thread_args.regex = &view->regex;
2179 done:
2180 	if (err)
2181 		close_log_view(view);
2182 	return err;
2183 }
2184 
2185 static const struct got_error *
2186 show_log_view(struct tog_view *view)
2187 {
2188 	struct tog_log_view_state *s = &view->state.log;
2189 
2190 	if (s->thread == NULL) {
2191 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2192 		    &s->thread_args);
2193 		if (errcode)
2194 			return got_error_set_errno(errcode, "pthread_create");
2195 	}
2196 
2197 	return draw_commits(view, &s->last_displayed_entry,
2198 	    &s->selected_entry, s->first_displayed_entry,
2199 	    &s->commits, s->selected, view->nlines, s->refs,
2200 	    s->in_repo_path, s->thread_args.commits_needed, &s->colors);
2201 }
2202 
2203 static const struct got_error *
2204 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
2205     struct tog_view **focus_view, struct tog_view *view, int ch)
2206 {
2207 	const struct got_error *err = NULL;
2208 	struct tog_log_view_state *s = &view->state.log;
2209 	char *parent_path, *in_repo_path = NULL;
2210 	struct tog_view *diff_view = NULL, *tree_view = NULL, *lv = NULL;
2211 	int begin_x = 0;
2212 	struct got_object_id *start_id;
2213 
2214 	switch (ch) {
2215 	case 'q':
2216 		s->quit = 1;
2217 		break;
2218 	case 'k':
2219 	case KEY_UP:
2220 	case '<':
2221 	case ',':
2222 		if (s->first_displayed_entry == NULL)
2223 			break;
2224 		if (s->selected > 0)
2225 			s->selected--;
2226 		else
2227 			scroll_up(view, &s->first_displayed_entry, 1,
2228 			    &s->commits);
2229 		break;
2230 	case KEY_PPAGE:
2231 	case CTRL('b'):
2232 		if (s->first_displayed_entry == NULL)
2233 			break;
2234 		if (TAILQ_FIRST(&s->commits.head) ==
2235 		    s->first_displayed_entry) {
2236 			s->selected = 0;
2237 			break;
2238 		}
2239 		scroll_up(view, &s->first_displayed_entry,
2240 		    view->nlines, &s->commits);
2241 		break;
2242 	case 'j':
2243 	case KEY_DOWN:
2244 	case '>':
2245 	case '.':
2246 		if (s->first_displayed_entry == NULL)
2247 			break;
2248 		if (s->selected < MIN(view->nlines - 2,
2249 		    s->commits.ncommits - 1)) {
2250 			s->selected++;
2251 			break;
2252 		}
2253 		err = scroll_down(view, &s->first_displayed_entry, 1,
2254 		    &s->last_displayed_entry, &s->commits,
2255 		    &s->thread_args.log_complete,
2256 		    &s->thread_args.commits_needed,
2257 		    &s->thread_args.need_commits);
2258 		break;
2259 	case KEY_NPAGE:
2260 	case CTRL('f'): {
2261 		struct commit_queue_entry *first;
2262 		first = s->first_displayed_entry;
2263 		if (first == NULL)
2264 			break;
2265 		err = scroll_down(view, &s->first_displayed_entry,
2266 		    view->nlines, &s->last_displayed_entry,
2267 		    &s->commits, &s->thread_args.log_complete,
2268 		    &s->thread_args.commits_needed,
2269 		    &s->thread_args.need_commits);
2270 		if (err)
2271 			break;
2272 		if (first == s->first_displayed_entry &&
2273 		    s->selected < MIN(view->nlines - 2,
2274 		    s->commits.ncommits - 1)) {
2275 			/* can't scroll further down */
2276 			s->selected = MIN(view->nlines - 2,
2277 			    s->commits.ncommits - 1);
2278 		}
2279 		err = NULL;
2280 		break;
2281 	}
2282 	case KEY_RESIZE:
2283 		if (s->selected > view->nlines - 2)
2284 			s->selected = view->nlines - 2;
2285 		if (s->selected > s->commits.ncommits - 1)
2286 			s->selected = s->commits.ncommits - 1;
2287 		break;
2288 	case KEY_ENTER:
2289 	case ' ':
2290 	case '\r':
2291 		if (s->selected_entry == NULL)
2292 			break;
2293 		if (view_is_parent_view(view))
2294 			begin_x = view_split_begin_x(view->begin_x);
2295 		err = open_diff_view_for_commit(&diff_view, begin_x,
2296 		    s->selected_entry->commit, s->selected_entry->id,
2297 		    view, s->refs, s->repo);
2298 		if (err)
2299 			break;
2300 		if (view_is_parent_view(view)) {
2301 			err = view_close_child(view);
2302 			if (err)
2303 				return err;
2304 			err = view_set_child(view, diff_view);
2305 			if (err) {
2306 				view_close(diff_view);
2307 				break;
2308 			}
2309 			*focus_view = diff_view;
2310 			view->child_focussed = 1;
2311 		} else
2312 			*new_view = diff_view;
2313 		break;
2314 	case 't':
2315 		if (s->selected_entry == NULL)
2316 			break;
2317 		if (view_is_parent_view(view))
2318 			begin_x = view_split_begin_x(view->begin_x);
2319 		err = browse_commit_tree(&tree_view, begin_x,
2320 		    s->selected_entry, s->in_repo_path, s->refs, s->repo);
2321 		if (err)
2322 			break;
2323 		if (view_is_parent_view(view)) {
2324 			err = view_close_child(view);
2325 			if (err)
2326 				return err;
2327 			err = view_set_child(view, tree_view);
2328 			if (err) {
2329 				view_close(tree_view);
2330 				break;
2331 			}
2332 			*focus_view = tree_view;
2333 			view->child_focussed = 1;
2334 		} else
2335 			*new_view = tree_view;
2336 		break;
2337 	case KEY_BACKSPACE:
2338 		if (strcmp(s->in_repo_path, "/") == 0)
2339 			break;
2340 		parent_path = dirname(s->in_repo_path);
2341 		if (parent_path && strcmp(parent_path, ".") != 0) {
2342 			err = stop_log_thread(s);
2343 			if (err)
2344 				return err;
2345 			lv = view_open(view->nlines, view->ncols,
2346 			    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2347 			if (lv == NULL)
2348 				return got_error_from_errno(
2349 				    "view_open");
2350 			err = open_log_view(lv, s->start_id, s->refs,
2351 			    s->repo, s->head_ref_name, parent_path, 0,
2352 			    s->log_branches);
2353 			if (err)
2354 				return err;;
2355 			if (view_is_parent_view(view))
2356 				*new_view = lv;
2357 			else {
2358 				view_set_child(view->parent, lv);
2359 				*focus_view = lv;
2360 			}
2361 			return NULL;
2362 		}
2363 		break;
2364 	case CTRL('l'):
2365 		err = stop_log_thread(s);
2366 		if (err)
2367 			return err;
2368 		lv = view_open(view->nlines, view->ncols,
2369 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2370 		if (lv == NULL)
2371 			return got_error_from_errno("view_open");
2372 		err = got_repo_match_object_id(&start_id, NULL,
2373 		    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2374 		    GOT_OBJ_TYPE_COMMIT, 1, s->repo);
2375 		if (err) {
2376 			view_close(lv);
2377 			return err;
2378 		}
2379 		in_repo_path = strdup(s->in_repo_path);
2380 		if (in_repo_path == NULL) {
2381 			free(start_id);
2382 			view_close(lv);
2383 			return got_error_from_errno("strdup");
2384 		}
2385 		got_ref_list_free(s->refs);
2386 		err = got_ref_list(s->refs, s->repo, NULL,
2387 		    got_ref_cmp_by_name, NULL);
2388 		if (err) {
2389 			free(start_id);
2390 			view_close(lv);
2391 			return err;
2392 		}
2393 		err = open_log_view(lv, start_id, s->refs, s->repo,
2394 		    s->head_ref_name, in_repo_path, 0, s->log_branches);
2395 		if (err) {
2396 			free(start_id);
2397 			view_close(lv);
2398 			return err;;
2399 		}
2400 		*dead_view = view;
2401 		*new_view = lv;
2402 		break;
2403 	case 'B':
2404 		s->log_branches = !s->log_branches;
2405 		err = stop_log_thread(s);
2406 		if (err)
2407 			return err;
2408 		lv = view_open(view->nlines, view->ncols,
2409 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2410 		if (lv == NULL)
2411 			return got_error_from_errno("view_open");
2412 		err = open_log_view(lv, s->start_id, s->refs, s->repo,
2413 		    s->head_ref_name, s->in_repo_path, 0, s->log_branches);
2414 		if (err) {
2415 			view_close(lv);
2416 			return err;;
2417 		}
2418 		*dead_view = view;
2419 		*new_view = lv;
2420 		break;
2421 	default:
2422 		break;
2423 	}
2424 
2425 	return err;
2426 }
2427 
2428 static const struct got_error *
2429 apply_unveil(const char *repo_path, const char *worktree_path)
2430 {
2431 	const struct got_error *error;
2432 
2433 #ifdef PROFILE
2434 	if (unveil("gmon.out", "rwc") != 0)
2435 		return got_error_from_errno2("unveil", "gmon.out");
2436 #endif
2437 	if (repo_path && unveil(repo_path, "r") != 0)
2438 		return got_error_from_errno2("unveil", repo_path);
2439 
2440 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2441 		return got_error_from_errno2("unveil", worktree_path);
2442 
2443 	if (unveil("/tmp", "rwc") != 0)
2444 		return got_error_from_errno2("unveil", "/tmp");
2445 
2446 	error = got_privsep_unveil_exec_helpers();
2447 	if (error != NULL)
2448 		return error;
2449 
2450 	if (unveil(NULL, NULL) != 0)
2451 		return got_error_from_errno("unveil");
2452 
2453 	return NULL;
2454 }
2455 
2456 static void
2457 init_curses(void)
2458 {
2459 	initscr();
2460 	cbreak();
2461 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2462 	noecho();
2463 	nonl();
2464 	intrflush(stdscr, FALSE);
2465 	keypad(stdscr, TRUE);
2466 	curs_set(0);
2467 	if (getenv("TOG_COLORS") != NULL) {
2468 		start_color();
2469 		use_default_colors();
2470 	}
2471 	signal(SIGWINCH, tog_sigwinch);
2472 	signal(SIGPIPE, tog_sigpipe);
2473 	signal(SIGCONT, tog_sigcont);
2474 }
2475 
2476 static const struct got_error *
2477 cmd_log(int argc, char *argv[])
2478 {
2479 	const struct got_error *error;
2480 	struct got_repository *repo = NULL;
2481 	struct got_worktree *worktree = NULL;
2482 	struct got_reflist_head refs;
2483 	struct got_object_id *start_id = NULL;
2484 	char *path = NULL, *repo_path = NULL, *cwd = NULL;
2485 	char *start_commit = NULL, *head_ref_name = NULL;
2486 	int ch, log_branches = 0, check_disk = 1;
2487 	struct tog_view *view;
2488 
2489 	SIMPLEQ_INIT(&refs);
2490 
2491 #ifndef PROFILE
2492 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2493 	    NULL) == -1)
2494 		err(1, "pledge");
2495 #endif
2496 
2497 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2498 		switch (ch) {
2499 		case 'b':
2500 			log_branches = 1;
2501 			break;
2502 		case 'c':
2503 			start_commit = optarg;
2504 			break;
2505 		case 'r':
2506 			repo_path = realpath(optarg, NULL);
2507 			if (repo_path == NULL)
2508 				return got_error_from_errno2("realpath",
2509 				    optarg);
2510 			break;
2511 		default:
2512 			usage_log();
2513 			/* NOTREACHED */
2514 		}
2515 	}
2516 
2517 	argc -= optind;
2518 	argv += optind;
2519 
2520 	cwd = getcwd(NULL, 0);
2521 	if (cwd == NULL) {
2522 		error = got_error_from_errno("getcwd");
2523 		goto done;
2524 	}
2525 	error = got_worktree_open(&worktree, cwd);
2526 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
2527 		goto done;
2528 	error = NULL;
2529 
2530 	if (argc == 0) {
2531 		path = strdup("");
2532 		if (path == NULL) {
2533 			error = got_error_from_errno("strdup");
2534 			goto done;
2535 		}
2536 	} else if (argc == 1) {
2537 		if (worktree) {
2538 			error = got_worktree_resolve_path(&path, worktree,
2539 			    argv[0]);
2540 			if (error)
2541 				goto done;
2542 		} else {
2543 			path = strdup(argv[0]);
2544 			if (path == NULL) {
2545 				error = got_error_from_errno("strdup");
2546 				goto done;
2547 			}
2548 		}
2549 	} else
2550 		usage_log();
2551 
2552 	if (repo_path == NULL) {
2553 		if (worktree)
2554 			repo_path = strdup(
2555 			    got_worktree_get_repo_path(worktree));
2556 		else
2557 			repo_path = strdup(cwd);
2558 	}
2559 	if (repo_path == NULL) {
2560 		error = got_error_from_errno("strdup");
2561 		goto done;
2562 	}
2563 
2564 	init_curses();
2565 
2566 	error = got_repo_open(&repo, repo_path, NULL);
2567 	if (error != NULL)
2568 		goto done;
2569 
2570 	error = apply_unveil(got_repo_get_path(repo),
2571 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2572 	if (error)
2573 		goto done;
2574 
2575 	if (start_commit == NULL)
2576 		error = got_repo_match_object_id(&start_id, NULL, worktree ?
2577 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
2578 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2579 	else
2580 		error = got_repo_match_object_id(&start_id, NULL, start_commit,
2581 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2582 	if (error != NULL)
2583 		goto done;
2584 
2585 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
2586 	if (error)
2587 		goto done;
2588 
2589 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2590 	if (view == NULL) {
2591 		error = got_error_from_errno("view_open");
2592 		goto done;
2593 	}
2594 	if (worktree) {
2595 		const char *prefix = got_worktree_get_path_prefix(worktree);
2596 		char *p;
2597 		if (asprintf(&p, "%s%s%s", prefix,
2598 		    (strcmp(prefix, "/") != 0) ? "/" : "", path) == -1) {
2599 			error = got_error_from_errno("asprintf");
2600 			goto done;
2601 		}
2602 		free(path);
2603 		path = p;
2604 		check_disk = 0;
2605 
2606 		head_ref_name = strdup(
2607 		    got_worktree_get_head_ref_name(worktree));
2608 		if (head_ref_name == NULL) {
2609 			error = got_error_from_errno("strdup");
2610 			goto done;
2611 		}
2612 	}
2613 	error = open_log_view(view, start_id, &refs, repo, head_ref_name,
2614 	    path, check_disk, log_branches);
2615 	if (error)
2616 		goto done;
2617 	if (worktree) {
2618 		/* Release work tree lock. */
2619 		got_worktree_close(worktree);
2620 		worktree = NULL;
2621 	}
2622 	error = view_loop(view);
2623 done:
2624 	free(repo_path);
2625 	free(cwd);
2626 	free(path);
2627 	free(start_id);
2628 	free(head_ref_name);
2629 	if (repo)
2630 		got_repo_close(repo);
2631 	if (worktree)
2632 		got_worktree_close(worktree);
2633 	got_ref_list_free(&refs);
2634 	return error;
2635 }
2636 
2637 __dead static void
2638 usage_diff(void)
2639 {
2640 	endwin();
2641 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
2642 	    getprogname());
2643 	exit(1);
2644 }
2645 
2646 static char *
2647 parse_next_line(FILE *f, size_t *len)
2648 {
2649 	char *line;
2650 	size_t linelen;
2651 	size_t lineno;
2652 	const char delim[3] = { '\0', '\0', '\0'};
2653 
2654 	line = fparseln(f, &linelen, &lineno, delim, 0);
2655 	if (len)
2656 		*len = linelen;
2657 	return line;
2658 }
2659 
2660 static int
2661 match_line(const char *line, regex_t *regex)
2662 {
2663 	regmatch_t regmatch;
2664 
2665 	return regexec(regex, line, 1, &regmatch, 0) == 0;
2666 }
2667 
2668 struct tog_color *
2669 match_color(struct tog_colors *colors, const char *line)
2670 {
2671 	struct tog_color *tc = NULL;
2672 
2673 	SIMPLEQ_FOREACH(tc, colors, entry) {
2674 		if (match_line(line, &tc->regex))
2675 			return tc;
2676 	}
2677 
2678 	return NULL;
2679 }
2680 
2681 static const struct got_error *
2682 draw_file(struct tog_view *view, FILE *f, int *first_displayed_line,
2683     int *last_displayed_line, int *eof, int max_lines, char *header,
2684     struct tog_colors *colors)
2685 {
2686 	const struct got_error *err;
2687 	int nlines = 0, nprinted = 0;
2688 	char *line;
2689 	struct tog_color *tc;
2690 	size_t len;
2691 	wchar_t *wline;
2692 	int width;
2693 
2694 	rewind(f);
2695 	werase(view->window);
2696 
2697 	if (header) {
2698 		err = format_line(&wline, &width, header, view->ncols, 0);
2699 		if (err) {
2700 			return err;
2701 		}
2702 
2703 		if (view_needs_focus_indication(view))
2704 			wstandout(view->window);
2705 		waddwstr(view->window, wline);
2706 		if (view_needs_focus_indication(view))
2707 			wstandend(view->window);
2708 		if (width <= view->ncols - 1)
2709 			waddch(view->window, '\n');
2710 
2711 		if (max_lines <= 1)
2712 			return NULL;
2713 		max_lines--;
2714 	}
2715 
2716 	*eof = 0;
2717 	while (nprinted < max_lines) {
2718 		line = parse_next_line(f, &len);
2719 		if (line == NULL) {
2720 			*eof = 1;
2721 			break;
2722 		}
2723 		if (++nlines < *first_displayed_line) {
2724 			free(line);
2725 			continue;
2726 		}
2727 
2728 		err = format_line(&wline, &width, line, view->ncols, 0);
2729 		if (err) {
2730 			free(line);
2731 			return err;
2732 		}
2733 
2734 		tc = match_color(colors, line);
2735 		if (tc)
2736 			wattr_on(view->window,
2737 			    COLOR_PAIR(tc->colorpair), NULL);
2738 		waddwstr(view->window, wline);
2739 		if (tc)
2740 			wattr_off(view->window,
2741 			    COLOR_PAIR(tc->colorpair), NULL);
2742 		if (width <= view->ncols - 1)
2743 			waddch(view->window, '\n');
2744 		if (++nprinted == 1)
2745 			*first_displayed_line = nlines;
2746 		free(line);
2747 		free(wline);
2748 		wline = NULL;
2749 	}
2750 	*last_displayed_line = nlines;
2751 
2752 	view_vborder(view);
2753 
2754 	if (*eof) {
2755 		while (nprinted < view->nlines) {
2756 			waddch(view->window, '\n');
2757 			nprinted++;
2758 		}
2759 
2760 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols, 0);
2761 		if (err) {
2762 			return err;
2763 		}
2764 
2765 		wstandout(view->window);
2766 		waddwstr(view->window, wline);
2767 		wstandend(view->window);
2768 	}
2769 
2770 	return NULL;
2771 }
2772 
2773 static char *
2774 get_datestr(time_t *time, char *datebuf)
2775 {
2776 	struct tm mytm, *tm;
2777 	char *p, *s;
2778 
2779 	tm = gmtime_r(time, &mytm);
2780 	if (tm == NULL)
2781 		return NULL;
2782 	s = asctime_r(tm, datebuf);
2783 	if (s == NULL)
2784 		return NULL;
2785 	p = strchr(s, '\n');
2786 	if (p)
2787 		*p = '\0';
2788 	return s;
2789 }
2790 
2791 static const struct got_error *
2792 write_commit_info(struct got_object_id *commit_id,
2793     struct got_reflist_head *refs, struct got_repository *repo, FILE *outfile)
2794 {
2795 	const struct got_error *err = NULL;
2796 	char datebuf[26], *datestr;
2797 	struct got_commit_object *commit;
2798 	char *id_str = NULL, *logmsg = NULL;
2799 	time_t committer_time;
2800 	const char *author, *committer;
2801 	char *refs_str = NULL;
2802 
2803 	if (refs) {
2804 		err = build_refs_str(&refs_str, refs, commit_id, repo);
2805 		if (err)
2806 			return err;
2807 	}
2808 
2809 	err = got_object_open_as_commit(&commit, repo, commit_id);
2810 	if (err)
2811 		return err;
2812 
2813 	err = got_object_id_str(&id_str, commit_id);
2814 	if (err) {
2815 		err = got_error_from_errno("got_object_id_str");
2816 		goto done;
2817 	}
2818 
2819 	if (fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
2820 	    refs_str ? refs_str : "", refs_str ? ")" : "") < 0) {
2821 		err = got_error_from_errno("fprintf");
2822 		goto done;
2823 	}
2824 	if (fprintf(outfile, "from: %s\n",
2825 	    got_object_commit_get_author(commit)) < 0) {
2826 		err = got_error_from_errno("fprintf");
2827 		goto done;
2828 	}
2829 	committer_time = got_object_commit_get_committer_time(commit);
2830 	datestr = get_datestr(&committer_time, datebuf);
2831 	if (datestr && fprintf(outfile, "date: %s UTC\n", datestr) < 0) {
2832 		err = got_error_from_errno("fprintf");
2833 		goto done;
2834 	}
2835 	author = got_object_commit_get_author(commit);
2836 	committer = got_object_commit_get_committer(commit);
2837 	if (strcmp(author, committer) != 0 &&
2838 	    fprintf(outfile, "via: %s\n", committer) < 0) {
2839 		err = got_error_from_errno("fprintf");
2840 		goto done;
2841 	}
2842 	err = got_object_commit_get_logmsg(&logmsg, commit);
2843 	if (err)
2844 		goto done;
2845 	if (fprintf(outfile, "%s\n", logmsg) < 0) {
2846 		err = got_error_from_errno("fprintf");
2847 		goto done;
2848 	}
2849 done:
2850 	free(id_str);
2851 	free(logmsg);
2852 	free(refs_str);
2853 	got_object_commit_close(commit);
2854 	return err;
2855 }
2856 
2857 static const struct got_error *
2858 create_diff(struct tog_diff_view_state *s)
2859 {
2860 	const struct got_error *err = NULL;
2861 	FILE *f = NULL;
2862 	int obj_type;
2863 
2864 	f = got_opentemp();
2865 	if (f == NULL) {
2866 		err = got_error_from_errno("got_opentemp");
2867 		goto done;
2868 	}
2869 	if (s->f && fclose(s->f) != 0) {
2870 		err = got_error_from_errno("fclose");
2871 		goto done;
2872 	}
2873 	s->f = f;
2874 
2875 	if (s->id1)
2876 		err = got_object_get_type(&obj_type, s->repo, s->id1);
2877 	else
2878 		err = got_object_get_type(&obj_type, s->repo, s->id2);
2879 	if (err)
2880 		goto done;
2881 
2882 	switch (obj_type) {
2883 	case GOT_OBJ_TYPE_BLOB:
2884 		err = got_diff_objects_as_blobs(s->id1, s->id2, NULL, NULL,
2885 		    s->diff_context, 0, s->repo, f);
2886 		break;
2887 	case GOT_OBJ_TYPE_TREE:
2888 		err = got_diff_objects_as_trees(s->id1, s->id2, "", "",
2889 		    s->diff_context, 0, s->repo, f);
2890 		break;
2891 	case GOT_OBJ_TYPE_COMMIT: {
2892 		const struct got_object_id_queue *parent_ids;
2893 		struct got_object_qid *pid;
2894 		struct got_commit_object *commit2;
2895 
2896 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
2897 		if (err)
2898 			break;
2899 		/* Show commit info if we're diffing to a parent/root commit. */
2900 		if (s->id1 == NULL)
2901 			write_commit_info(s->id2, s->refs, s->repo, f);
2902 		else {
2903 			parent_ids = got_object_commit_get_parent_ids(commit2);
2904 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
2905 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
2906 					write_commit_info(s->id2, s->refs,
2907 					    s->repo, f);
2908 					break;
2909 				}
2910 			}
2911 		}
2912 		got_object_commit_close(commit2);
2913 
2914 		err = got_diff_objects_as_commits(s->id1, s->id2,
2915 		    s->diff_context, 0, s->repo, f);
2916 		break;
2917 	}
2918 	default:
2919 		err = got_error(GOT_ERR_OBJ_TYPE);
2920 		break;
2921 	}
2922 done:
2923 	if (f && fflush(f) != 0 && err == NULL)
2924 		err = got_error_from_errno("fflush");
2925 	return err;
2926 }
2927 
2928 static void
2929 diff_view_indicate_progress(struct tog_view *view)
2930 {
2931 	mvwaddstr(view->window, 0, 0, "diffing...");
2932 	update_panels();
2933 	doupdate();
2934 }
2935 
2936 static const struct got_error *
2937 open_diff_view(struct tog_view *view, struct got_object_id *id1,
2938     struct got_object_id *id2, struct tog_view *log_view,
2939     struct got_reflist_head *refs, struct got_repository *repo)
2940 {
2941 	const struct got_error *err;
2942 	struct tog_diff_view_state *s = &view->state.diff;
2943 
2944 	if (id1 != NULL && id2 != NULL) {
2945 	    int type1, type2;
2946 	    err = got_object_get_type(&type1, repo, id1);
2947 	    if (err)
2948 		return err;
2949 	    err = got_object_get_type(&type2, repo, id2);
2950 	    if (err)
2951 		return err;
2952 
2953 	    if (type1 != type2)
2954 		return got_error(GOT_ERR_OBJ_TYPE);
2955 	}
2956 
2957 	if (id1) {
2958 		s->id1 = got_object_id_dup(id1);
2959 		if (s->id1 == NULL)
2960 			return got_error_from_errno("got_object_id_dup");
2961 	} else
2962 		s->id1 = NULL;
2963 
2964 	s->id2 = got_object_id_dup(id2);
2965 	if (s->id2 == NULL) {
2966 		free(s->id1);
2967 		s->id1 = NULL;
2968 		return got_error_from_errno("got_object_id_dup");
2969 	}
2970 	s->f = NULL;
2971 	s->first_displayed_line = 1;
2972 	s->last_displayed_line = view->nlines;
2973 	s->diff_context = 3;
2974 	s->log_view = log_view;
2975 	s->repo = repo;
2976 	s->refs = refs;
2977 	SIMPLEQ_INIT(&s->colors);
2978 
2979 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2980 		err = add_color(&s->colors,
2981 		    "^-", TOG_COLOR_DIFF_MINUS,
2982 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
2983 		if (err)
2984 			return err;
2985 		err = add_color(&s->colors, "^\\+",
2986 		    TOG_COLOR_DIFF_PLUS,
2987 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
2988 		if (err) {
2989 			free_colors(&s->colors);
2990 			return err;
2991 		}
2992 		err = add_color(&s->colors,
2993 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
2994 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
2995 		if (err) {
2996 			free_colors(&s->colors);
2997 			return err;
2998 		}
2999 
3000 		err = add_color(&s->colors, 
3001 		    "^(commit|(blob|file) [-+] )", TOG_COLOR_DIFF_META,
3002 		    get_color_value("TOG_COLOR_DIFF_META"));
3003 		if (err) {
3004 			free_colors(&s->colors);
3005 			return err;
3006 		}
3007 
3008 		err = add_color(&s->colors,
3009 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3010 		    get_color_value("TOG_COLOR_AUTHOR"));
3011 		if (err) {
3012 			free_colors(&s->colors);
3013 			return err;
3014 		}
3015 
3016 		err = add_color(&s->colors,
3017 		    "^date: ", TOG_COLOR_DATE,
3018 		    get_color_value("TOG_COLOR_DATE"));
3019 		if (err) {
3020 			free_colors(&s->colors);
3021 			return err;
3022 		}
3023 	}
3024 
3025 	if (log_view && view_is_splitscreen(view))
3026 		show_log_view(log_view); /* draw vborder */
3027 	diff_view_indicate_progress(view);
3028 
3029 	err = create_diff(s);
3030 	if (err) {
3031 		free(s->id1);
3032 		s->id1 = NULL;
3033 		free(s->id2);
3034 		s->id2 = NULL;
3035 		return err;
3036 	}
3037 
3038 	view->show = show_diff_view;
3039 	view->input = input_diff_view;
3040 	view->close = close_diff_view;
3041 
3042 	return NULL;
3043 }
3044 
3045 static const struct got_error *
3046 close_diff_view(struct tog_view *view)
3047 {
3048 	const struct got_error *err = NULL;
3049 	struct tog_diff_view_state *s = &view->state.diff;
3050 
3051 	free(s->id1);
3052 	s->id1 = NULL;
3053 	free(s->id2);
3054 	s->id2 = NULL;
3055 	if (s->f && fclose(s->f) == EOF)
3056 		err = got_error_from_errno("fclose");
3057 	free_colors(&s->colors);
3058 	return err;
3059 }
3060 
3061 static const struct got_error *
3062 show_diff_view(struct tog_view *view)
3063 {
3064 	const struct got_error *err;
3065 	struct tog_diff_view_state *s = &view->state.diff;
3066 	char *id_str1 = NULL, *id_str2, *header;
3067 
3068 	if (s->id1) {
3069 		err = got_object_id_str(&id_str1, s->id1);
3070 		if (err)
3071 			return err;
3072 	}
3073 	err = got_object_id_str(&id_str2, s->id2);
3074 	if (err)
3075 		return err;
3076 
3077 	if (asprintf(&header, "diff %s %s",
3078 	    id_str1 ? id_str1 : "/dev/null", id_str2) == -1) {
3079 		err = got_error_from_errno("asprintf");
3080 		free(id_str1);
3081 		free(id_str2);
3082 		return err;
3083 	}
3084 	free(id_str1);
3085 	free(id_str2);
3086 
3087 	return draw_file(view, s->f, &s->first_displayed_line,
3088 	    &s->last_displayed_line, &s->eof, view->nlines,
3089 	    header, &s->colors);
3090 }
3091 
3092 static const struct got_error *
3093 set_selected_commit(struct tog_diff_view_state *s,
3094     struct commit_queue_entry *entry)
3095 {
3096 	const struct got_error *err;
3097 	const struct got_object_id_queue *parent_ids;
3098 	struct got_commit_object *selected_commit;
3099 	struct got_object_qid *pid;
3100 
3101 	free(s->id2);
3102 	s->id2 = got_object_id_dup(entry->id);
3103 	if (s->id2 == NULL)
3104 		return got_error_from_errno("got_object_id_dup");
3105 
3106 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3107 	if (err)
3108 		return err;
3109 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3110 	free(s->id1);
3111 	pid = SIMPLEQ_FIRST(parent_ids);
3112 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
3113 	got_object_commit_close(selected_commit);
3114 	return NULL;
3115 }
3116 
3117 static const struct got_error *
3118 input_diff_view(struct tog_view **new_view, struct tog_view **dead_view,
3119     struct tog_view **focus_view, struct tog_view *view, int ch)
3120 {
3121 	const struct got_error *err = NULL;
3122 	struct tog_diff_view_state *s = &view->state.diff;
3123 	struct tog_log_view_state *ls;
3124 	struct commit_queue_entry *entry;
3125 	int i;
3126 
3127 	switch (ch) {
3128 	case 'k':
3129 	case KEY_UP:
3130 		if (s->first_displayed_line > 1)
3131 			s->first_displayed_line--;
3132 		break;
3133 	case KEY_PPAGE:
3134 	case CTRL('b'):
3135 		if (s->first_displayed_line == 1)
3136 			break;
3137 		i = 0;
3138 		while (i++ < view->nlines - 1 &&
3139 		    s->first_displayed_line > 1)
3140 			s->first_displayed_line--;
3141 		break;
3142 	case 'j':
3143 	case KEY_DOWN:
3144 		if (!s->eof)
3145 			s->first_displayed_line++;
3146 		break;
3147 	case KEY_NPAGE:
3148 	case CTRL('f'):
3149 	case ' ':
3150 		if (s->eof)
3151 			break;
3152 		i = 0;
3153 		while (!s->eof && i++ < view->nlines - 1) {
3154 			char *line;
3155 			line = parse_next_line(s->f, NULL);
3156 			s->first_displayed_line++;
3157 			if (line == NULL)
3158 				break;
3159 		}
3160 		break;
3161 	case '[':
3162 		if (s->diff_context > 0) {
3163 			s->diff_context--;
3164 			diff_view_indicate_progress(view);
3165 			err = create_diff(s);
3166 		}
3167 		break;
3168 	case ']':
3169 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
3170 			s->diff_context++;
3171 			diff_view_indicate_progress(view);
3172 			err = create_diff(s);
3173 		}
3174 		break;
3175 	case '<':
3176 	case ',':
3177 		if (s->log_view == NULL)
3178 			break;
3179 		ls = &s->log_view->state.log;
3180 		entry = TAILQ_PREV(ls->selected_entry,
3181 		    commit_queue_head, entry);
3182 		if (entry == NULL)
3183 			break;
3184 
3185 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3186 		    KEY_UP);
3187 		if (err)
3188 			break;
3189 
3190 		err = set_selected_commit(s, entry);
3191 		if (err)
3192 			break;
3193 
3194 		s->first_displayed_line = 1;
3195 		s->last_displayed_line = view->nlines;
3196 
3197 		diff_view_indicate_progress(view);
3198 		err = create_diff(s);
3199 		break;
3200 	case '>':
3201 	case '.':
3202 		if (s->log_view == NULL)
3203 			break;
3204 		ls = &s->log_view->state.log;
3205 
3206 		if (TAILQ_NEXT(ls->selected_entry, entry) == NULL) {
3207 			ls->thread_args.commits_needed++;
3208 
3209 			/* Display "loading..." in log view. */
3210 			show_log_view(s->log_view);
3211 			update_panels();
3212 			doupdate();
3213 
3214 			err = trigger_log_thread(1 /* load_all */,
3215 			    &ls->thread_args.commits_needed,
3216 			    &ls->thread_args.log_complete,
3217 			    &ls->thread_args.need_commits);
3218 			if (err)
3219 				break;
3220 		}
3221 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3222 		    KEY_DOWN);
3223 		if (err)
3224 			break;
3225 
3226 		entry = TAILQ_NEXT(ls->selected_entry, entry);
3227 		if (entry == NULL)
3228 			break;
3229 
3230 		err = set_selected_commit(s, entry);
3231 		if (err)
3232 			break;
3233 
3234 		s->first_displayed_line = 1;
3235 		s->last_displayed_line = view->nlines;
3236 
3237 		diff_view_indicate_progress(view);
3238 		err = create_diff(s);
3239 		break;
3240 	default:
3241 		break;
3242 	}
3243 
3244 	return err;
3245 }
3246 
3247 static const struct got_error *
3248 cmd_diff(int argc, char *argv[])
3249 {
3250 	const struct got_error *error = NULL;
3251 	struct got_repository *repo = NULL;
3252 	struct got_reflist_head refs;
3253 	struct got_object_id *id1 = NULL, *id2 = NULL;
3254 	char *repo_path = NULL;
3255 	char *id_str1 = NULL, *id_str2 = NULL;
3256 	int ch;
3257 	struct tog_view *view;
3258 
3259 	SIMPLEQ_INIT(&refs);
3260 
3261 #ifndef PROFILE
3262 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
3263 	    NULL) == -1)
3264 		err(1, "pledge");
3265 #endif
3266 
3267 	while ((ch = getopt(argc, argv, "")) != -1) {
3268 		switch (ch) {
3269 		default:
3270 			usage_diff();
3271 			/* NOTREACHED */
3272 		}
3273 	}
3274 
3275 	argc -= optind;
3276 	argv += optind;
3277 
3278 	if (argc == 0) {
3279 		usage_diff(); /* TODO show local worktree changes */
3280 	} else if (argc == 2) {
3281 		repo_path = getcwd(NULL, 0);
3282 		if (repo_path == NULL)
3283 			return got_error_from_errno("getcwd");
3284 		id_str1 = argv[0];
3285 		id_str2 = argv[1];
3286 	} else if (argc == 3) {
3287 		repo_path = realpath(argv[0], NULL);
3288 		if (repo_path == NULL)
3289 			return got_error_from_errno2("realpath", argv[0]);
3290 		id_str1 = argv[1];
3291 		id_str2 = argv[2];
3292 	} else
3293 		usage_diff();
3294 
3295 	init_curses();
3296 
3297 	error = got_repo_open(&repo, repo_path, NULL);
3298 	if (error)
3299 		goto done;
3300 
3301 	error = apply_unveil(got_repo_get_path(repo), NULL);
3302 	if (error)
3303 		goto done;
3304 
3305 	error = got_repo_match_object_id_prefix(&id1, id_str1,
3306 	    GOT_OBJ_TYPE_ANY, repo);
3307 	if (error)
3308 		goto done;
3309 
3310 	error = got_repo_match_object_id_prefix(&id2, id_str2,
3311 	    GOT_OBJ_TYPE_ANY, repo);
3312 	if (error)
3313 		goto done;
3314 
3315 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
3316 	if (error)
3317 		goto done;
3318 
3319 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
3320 	if (view == NULL) {
3321 		error = got_error_from_errno("view_open");
3322 		goto done;
3323 	}
3324 	error = open_diff_view(view, id1, id2, NULL, &refs, repo);
3325 	if (error)
3326 		goto done;
3327 	error = view_loop(view);
3328 done:
3329 	free(repo_path);
3330 	if (repo)
3331 		got_repo_close(repo);
3332 	got_ref_list_free(&refs);
3333 	return error;
3334 }
3335 
3336 __dead static void
3337 usage_blame(void)
3338 {
3339 	endwin();
3340 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
3341 	    getprogname());
3342 	exit(1);
3343 }
3344 
3345 struct tog_blame_line {
3346 	int annotated;
3347 	struct got_object_id *id;
3348 };
3349 
3350 static const struct got_error *
3351 draw_blame(struct tog_view *view, struct got_object_id *id, FILE *f,
3352     const char *path, struct tog_blame_line *lines, int nlines,
3353     int blame_complete, int selected_line, int *first_displayed_line,
3354     int *last_displayed_line, int *eof, int max_lines,
3355     struct tog_colors *colors)
3356 {
3357 	const struct got_error *err;
3358 	int lineno = 0, nprinted = 0;
3359 	char *line;
3360 	size_t len;
3361 	wchar_t *wline;
3362 	int width;
3363 	struct tog_blame_line *blame_line;
3364 	struct got_object_id *prev_id = NULL;
3365 	char *id_str;
3366 	struct tog_color *tc;
3367 
3368 	err = got_object_id_str(&id_str, id);
3369 	if (err)
3370 		return err;
3371 
3372 	rewind(f);
3373 	werase(view->window);
3374 
3375 	if (asprintf(&line, "commit %s", id_str) == -1) {
3376 		err = got_error_from_errno("asprintf");
3377 		free(id_str);
3378 		return err;
3379 	}
3380 
3381 	err = format_line(&wline, &width, line, view->ncols, 0);
3382 	free(line);
3383 	line = NULL;
3384 	if (err)
3385 		return err;
3386 	if (view_needs_focus_indication(view))
3387 		wstandout(view->window);
3388 	tc = get_color(colors, TOG_COLOR_COMMIT);
3389 	if (tc)
3390 		wattr_on(view->window,
3391 		    COLOR_PAIR(tc->colorpair), NULL);
3392 	waddwstr(view->window, wline);
3393 	if (tc)
3394 		wattr_off(view->window,
3395 		    COLOR_PAIR(tc->colorpair), NULL);
3396 	if (view_needs_focus_indication(view))
3397 		wstandend(view->window);
3398 	free(wline);
3399 	wline = NULL;
3400 	if (width < view->ncols - 1)
3401 		waddch(view->window, '\n');
3402 
3403 	if (asprintf(&line, "[%d/%d] %s%s",
3404 	    *first_displayed_line - 1 + selected_line, nlines,
3405 	    blame_complete ? "" : "annotating... ", path) == -1) {
3406 		free(id_str);
3407 		return got_error_from_errno("asprintf");
3408 	}
3409 	free(id_str);
3410 	err = format_line(&wline, &width, line, view->ncols, 0);
3411 	free(line);
3412 	line = NULL;
3413 	if (err)
3414 		return err;
3415 	waddwstr(view->window, wline);
3416 	free(wline);
3417 	wline = NULL;
3418 	if (width < view->ncols - 1)
3419 		waddch(view->window, '\n');
3420 
3421 	*eof = 0;
3422 	while (nprinted < max_lines - 2) {
3423 		line = parse_next_line(f, &len);
3424 		if (line == NULL) {
3425 			*eof = 1;
3426 			break;
3427 		}
3428 		if (++lineno < *first_displayed_line) {
3429 			free(line);
3430 			continue;
3431 		}
3432 
3433 		if (view->ncols <= 9) {
3434 			width = 9;
3435 			wline = wcsdup(L"");
3436 			if (wline == NULL)
3437 				err = got_error_from_errno("wcsdup");
3438 		} else {
3439 			err = format_line(&wline, &width, line,
3440 			    view->ncols - 9, 9);
3441 			width += 9;
3442 		}
3443 		if (err) {
3444 			free(line);
3445 			return err;
3446 		}
3447 
3448 		if (view->focussed && nprinted == selected_line - 1)
3449 			wstandout(view->window);
3450 
3451 		if (nlines > 0) {
3452 			blame_line = &lines[lineno - 1];
3453 			if (blame_line->annotated && prev_id &&
3454 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
3455 			    !(view->focussed &&
3456 			    nprinted == selected_line - 1)) {
3457 				waddstr(view->window, "        ");
3458 			} else if (blame_line->annotated) {
3459 				char *id_str;
3460 				err = got_object_id_str(&id_str, blame_line->id);
3461 				if (err) {
3462 					free(line);
3463 					free(wline);
3464 					return err;
3465 				}
3466 				tc = get_color(colors, TOG_COLOR_COMMIT);
3467 				if (tc)
3468 					wattr_on(view->window,
3469 					    COLOR_PAIR(tc->colorpair), NULL);
3470 				wprintw(view->window, "%.8s", id_str);
3471 				if (tc)
3472 					wattr_off(view->window,
3473 					    COLOR_PAIR(tc->colorpair), NULL);
3474 				free(id_str);
3475 				prev_id = blame_line->id;
3476 			} else {
3477 				waddstr(view->window, "........");
3478 				prev_id = NULL;
3479 			}
3480 		} else {
3481 			waddstr(view->window, "........");
3482 			prev_id = NULL;
3483 		}
3484 
3485 		if (view->focussed && nprinted == selected_line - 1)
3486 			wstandend(view->window);
3487 		waddstr(view->window, " ");
3488 
3489 		waddwstr(view->window, wline);
3490 		if (width <= view->ncols - 1)
3491 			waddch(view->window, '\n');
3492 		if (++nprinted == 1)
3493 			*first_displayed_line = lineno;
3494 		free(line);
3495 		free(wline);
3496 		wline = NULL;
3497 	}
3498 	*last_displayed_line = lineno;
3499 
3500 	view_vborder(view);
3501 
3502 	return NULL;
3503 }
3504 
3505 static const struct got_error *
3506 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
3507 {
3508 	const struct got_error *err = NULL;
3509 	struct tog_blame_cb_args *a = arg;
3510 	struct tog_blame_line *line;
3511 	int errcode;
3512 
3513 	if (nlines != a->nlines ||
3514 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
3515 		return got_error(GOT_ERR_RANGE);
3516 
3517 	errcode = pthread_mutex_lock(&tog_mutex);
3518 	if (errcode)
3519 		return got_error_set_errno(errcode, "pthread_mutex_lock");
3520 
3521 	if (*a->quit) {	/* user has quit the blame view */
3522 		err = got_error(GOT_ERR_ITER_COMPLETED);
3523 		goto done;
3524 	}
3525 
3526 	if (lineno == -1)
3527 		goto done; /* no change in this commit */
3528 
3529 	line = &a->lines[lineno - 1];
3530 	if (line->annotated)
3531 		goto done;
3532 
3533 	line->id = got_object_id_dup(id);
3534 	if (line->id == NULL) {
3535 		err = got_error_from_errno("got_object_id_dup");
3536 		goto done;
3537 	}
3538 	line->annotated = 1;
3539 done:
3540 	errcode = pthread_mutex_unlock(&tog_mutex);
3541 	if (errcode)
3542 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
3543 	return err;
3544 }
3545 
3546 static void *
3547 blame_thread(void *arg)
3548 {
3549 	const struct got_error *err;
3550 	struct tog_blame_thread_args *ta = arg;
3551 	struct tog_blame_cb_args *a = ta->cb_args;
3552 	int errcode;
3553 
3554 	err = block_signals_used_by_main_thread();
3555 	if (err)
3556 		return (void *)err;
3557 
3558 	err = got_blame(ta->path, a->commit_id, ta->repo,
3559 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
3560 	if (err && err->code == GOT_ERR_CANCELLED)
3561 		err = NULL;
3562 
3563 	errcode = pthread_mutex_lock(&tog_mutex);
3564 	if (errcode)
3565 		return (void *)got_error_set_errno(errcode,
3566 		    "pthread_mutex_lock");
3567 
3568 	got_repo_close(ta->repo);
3569 	ta->repo = NULL;
3570 	*ta->complete = 1;
3571 
3572 	errcode = pthread_mutex_unlock(&tog_mutex);
3573 	if (errcode && err == NULL)
3574 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
3575 
3576 	return (void *)err;
3577 }
3578 
3579 static struct got_object_id *
3580 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
3581     int first_displayed_line, int selected_line)
3582 {
3583 	struct tog_blame_line *line;
3584 
3585 	if (nlines <= 0)
3586 		return NULL;
3587 
3588 	line = &lines[first_displayed_line - 1 + selected_line - 1];
3589 	if (!line->annotated)
3590 		return NULL;
3591 
3592 	return line->id;
3593 }
3594 
3595 static const struct got_error *
3596 stop_blame(struct tog_blame *blame)
3597 {
3598 	const struct got_error *err = NULL;
3599 	int i;
3600 
3601 	if (blame->thread) {
3602 		int errcode;
3603 		errcode = pthread_mutex_unlock(&tog_mutex);
3604 		if (errcode)
3605 			return got_error_set_errno(errcode,
3606 			    "pthread_mutex_unlock");
3607 		errcode = pthread_join(blame->thread, (void **)&err);
3608 		if (errcode)
3609 			return got_error_set_errno(errcode, "pthread_join");
3610 		errcode = pthread_mutex_lock(&tog_mutex);
3611 		if (errcode)
3612 			return got_error_set_errno(errcode,
3613 			    "pthread_mutex_lock");
3614 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
3615 			err = NULL;
3616 		blame->thread = NULL;
3617 	}
3618 	if (blame->thread_args.repo) {
3619 		got_repo_close(blame->thread_args.repo);
3620 		blame->thread_args.repo = NULL;
3621 	}
3622 	if (blame->f) {
3623 		if (fclose(blame->f) != 0 && err == NULL)
3624 			err = got_error_from_errno("fclose");
3625 		blame->f = NULL;
3626 	}
3627 	if (blame->lines) {
3628 		for (i = 0; i < blame->nlines; i++)
3629 			free(blame->lines[i].id);
3630 		free(blame->lines);
3631 		blame->lines = NULL;
3632 	}
3633 	free(blame->cb_args.commit_id);
3634 	blame->cb_args.commit_id = NULL;
3635 
3636 	return err;
3637 }
3638 
3639 static const struct got_error *
3640 cancel_blame_view(void *arg)
3641 {
3642 	const struct got_error *err = NULL;
3643 	int *done = arg;
3644 	int errcode;
3645 
3646 	errcode = pthread_mutex_lock(&tog_mutex);
3647 	if (errcode)
3648 		return got_error_set_errno(errcode,
3649 		    "pthread_mutex_unlock");
3650 
3651 	if (*done)
3652 		err = got_error(GOT_ERR_CANCELLED);
3653 
3654 	errcode = pthread_mutex_unlock(&tog_mutex);
3655 	if (errcode)
3656 		return got_error_set_errno(errcode,
3657 		    "pthread_mutex_lock");
3658 
3659 	return err;
3660 }
3661 
3662 static const struct got_error *
3663 run_blame(struct tog_blame *blame, struct tog_view *view, int *blame_complete,
3664     int *first_displayed_line, int *last_displayed_line, int *selected_line,
3665     int *done, int *eof, const char *path, struct got_object_id *commit_id,
3666     struct got_repository *repo)
3667 {
3668 	const struct got_error *err = NULL;
3669 	struct got_blob_object *blob = NULL;
3670 	struct got_repository *thread_repo = NULL;
3671 	struct got_object_id *obj_id = NULL;
3672 	int obj_type;
3673 
3674 	err = got_object_id_by_path(&obj_id, repo, commit_id, path);
3675 	if (err)
3676 		return err;
3677 
3678 	err = got_object_get_type(&obj_type, repo, obj_id);
3679 	if (err)
3680 		goto done;
3681 
3682 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
3683 		err = got_error(GOT_ERR_OBJ_TYPE);
3684 		goto done;
3685 	}
3686 
3687 	err = got_object_open_as_blob(&blob, repo, obj_id, 8192);
3688 	if (err)
3689 		goto done;
3690 	blame->f = got_opentemp();
3691 	if (blame->f == NULL) {
3692 		err = got_error_from_errno("got_opentemp");
3693 		goto done;
3694 	}
3695 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
3696 	    &blame->line_offsets, blame->f, blob);
3697 	if (err || blame->nlines == 0)
3698 		goto done;
3699 
3700 	/* Don't include \n at EOF in the blame line count. */
3701 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
3702 		blame->nlines--;
3703 
3704 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
3705 	if (blame->lines == NULL) {
3706 		err = got_error_from_errno("calloc");
3707 		goto done;
3708 	}
3709 
3710 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL);
3711 	if (err)
3712 		goto done;
3713 
3714 	blame->cb_args.view = view;
3715 	blame->cb_args.lines = blame->lines;
3716 	blame->cb_args.nlines = blame->nlines;
3717 	blame->cb_args.commit_id = got_object_id_dup(commit_id);
3718 	if (blame->cb_args.commit_id == NULL) {
3719 		err = got_error_from_errno("got_object_id_dup");
3720 		goto done;
3721 	}
3722 	blame->cb_args.quit = done;
3723 
3724 	blame->thread_args.path = path;
3725 	blame->thread_args.repo = thread_repo;
3726 	blame->thread_args.cb_args = &blame->cb_args;
3727 	blame->thread_args.complete = blame_complete;
3728 	blame->thread_args.cancel_cb = cancel_blame_view;
3729 	blame->thread_args.cancel_arg = done;
3730 	*blame_complete = 0;
3731 
3732 done:
3733 	if (blob)
3734 		got_object_blob_close(blob);
3735 	free(obj_id);
3736 	if (err)
3737 		stop_blame(blame);
3738 	return err;
3739 }
3740 
3741 static const struct got_error *
3742 open_blame_view(struct tog_view *view, char *path,
3743     struct got_object_id *commit_id, struct got_reflist_head *refs,
3744     struct got_repository *repo)
3745 {
3746 	const struct got_error *err = NULL;
3747 	struct tog_blame_view_state *s = &view->state.blame;
3748 
3749 	SIMPLEQ_INIT(&s->blamed_commits);
3750 
3751 	s->path = strdup(path);
3752 	if (s->path == NULL)
3753 		return got_error_from_errno("strdup");
3754 
3755 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
3756 	if (err) {
3757 		free(s->path);
3758 		return err;
3759 	}
3760 
3761 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
3762 	s->first_displayed_line = 1;
3763 	s->last_displayed_line = view->nlines;
3764 	s->selected_line = 1;
3765 	s->blame_complete = 0;
3766 	s->repo = repo;
3767 	s->refs = refs;
3768 	s->commit_id = commit_id;
3769 	memset(&s->blame, 0, sizeof(s->blame));
3770 
3771 	SIMPLEQ_INIT(&s->colors);
3772 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3773 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
3774 		    get_color_value("TOG_COLOR_COMMIT"));
3775 		if (err)
3776 			return err;
3777 	}
3778 
3779 	view->show = show_blame_view;
3780 	view->input = input_blame_view;
3781 	view->close = close_blame_view;
3782 	view->search_start = search_start_blame_view;
3783 	view->search_next = search_next_blame_view;
3784 
3785 	return run_blame(&s->blame, view, &s->blame_complete,
3786 	    &s->first_displayed_line, &s->last_displayed_line,
3787 	    &s->selected_line, &s->done, &s->eof, s->path,
3788 	    s->blamed_commit->id, s->repo);
3789 }
3790 
3791 static const struct got_error *
3792 close_blame_view(struct tog_view *view)
3793 {
3794 	const struct got_error *err = NULL;
3795 	struct tog_blame_view_state *s = &view->state.blame;
3796 
3797 	if (s->blame.thread)
3798 		err = stop_blame(&s->blame);
3799 
3800 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
3801 		struct got_object_qid *blamed_commit;
3802 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
3803 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
3804 		got_object_qid_free(blamed_commit);
3805 	}
3806 
3807 	free(s->path);
3808 	free_colors(&s->colors);
3809 
3810 	return err;
3811 }
3812 
3813 static const struct got_error *
3814 search_start_blame_view(struct tog_view *view)
3815 {
3816 	struct tog_blame_view_state *s = &view->state.blame;
3817 
3818 	s->matched_line = 0;
3819 	return NULL;
3820 }
3821 
3822 static const struct got_error *
3823 search_next_blame_view(struct tog_view *view)
3824 {
3825 	struct tog_blame_view_state *s = &view->state.blame;
3826 	int lineno;
3827 
3828 	if (!view->searching) {
3829 		view->search_next_done = 1;
3830 		return NULL;
3831 	}
3832 
3833 	if (s->matched_line) {
3834 		if (view->searching == TOG_SEARCH_FORWARD)
3835 			lineno = s->matched_line + 1;
3836 		else
3837 			lineno = s->matched_line - 1;
3838 	} else {
3839 		if (view->searching == TOG_SEARCH_FORWARD)
3840 			lineno = 1;
3841 		else
3842 			lineno = s->blame.nlines;
3843 	}
3844 
3845 	while (1) {
3846 		char *line = NULL;
3847 		off_t offset;
3848 		size_t len;
3849 
3850 		if (lineno <= 0 || lineno > s->blame.nlines) {
3851 			if (s->matched_line == 0) {
3852 				view->search_next_done = 1;
3853 				free(line);
3854 				break;
3855 			}
3856 
3857 			if (view->searching == TOG_SEARCH_FORWARD)
3858 				lineno = 1;
3859 			else
3860 				lineno = s->blame.nlines;
3861 		}
3862 
3863 		offset = s->blame.line_offsets[lineno - 1];
3864 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
3865 			free(line);
3866 			return got_error_from_errno("fseeko");
3867 		}
3868 		free(line);
3869 		line = parse_next_line(s->blame.f, &len);
3870 		if (line && match_line(line, &view->regex)) {
3871 			view->search_next_done = 1;
3872 			s->matched_line = lineno;
3873 			free(line);
3874 			break;
3875 		}
3876 		free(line);
3877 		if (view->searching == TOG_SEARCH_FORWARD)
3878 			lineno++;
3879 		else
3880 			lineno--;
3881 	}
3882 
3883 	if (s->matched_line) {
3884 		s->first_displayed_line = s->matched_line;
3885 		s->selected_line = 1;
3886 	}
3887 
3888 	return NULL;
3889 }
3890 
3891 static const struct got_error *
3892 show_blame_view(struct tog_view *view)
3893 {
3894 	const struct got_error *err = NULL;
3895 	struct tog_blame_view_state *s = &view->state.blame;
3896 	int errcode;
3897 
3898 	if (s->blame.thread == NULL) {
3899 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
3900 		    &s->blame.thread_args);
3901 		if (errcode)
3902 			return got_error_set_errno(errcode, "pthread_create");
3903 
3904 		halfdelay(1); /* fast refresh while annotating  */
3905 	}
3906 
3907 	if (s->blame_complete)
3908 		halfdelay(10); /* disable fast refresh */
3909 
3910 	err = draw_blame(view, s->blamed_commit->id, s->blame.f,
3911 	    s->path, s->blame.lines, s->blame.nlines, s->blame_complete,
3912 	    s->selected_line, &s->first_displayed_line,
3913 	    &s->last_displayed_line, &s->eof, view->nlines, &s->colors);
3914 
3915 	view_vborder(view);
3916 	return err;
3917 }
3918 
3919 static const struct got_error *
3920 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
3921     struct tog_view **focus_view, struct tog_view *view, int ch)
3922 {
3923 	const struct got_error *err = NULL, *thread_err = NULL;
3924 	struct tog_view *diff_view;
3925 	struct tog_blame_view_state *s = &view->state.blame;
3926 	int begin_x = 0;
3927 
3928 	switch (ch) {
3929 	case 'q':
3930 		s->done = 1;
3931 		break;
3932 	case 'k':
3933 	case KEY_UP:
3934 		if (s->selected_line > 1)
3935 			s->selected_line--;
3936 		else if (s->selected_line == 1 &&
3937 		    s->first_displayed_line > 1)
3938 			s->first_displayed_line--;
3939 		break;
3940 	case KEY_PPAGE:
3941 		if (s->first_displayed_line == 1) {
3942 			s->selected_line = 1;
3943 			break;
3944 		}
3945 		if (s->first_displayed_line > view->nlines - 2)
3946 			s->first_displayed_line -=
3947 			    (view->nlines - 2);
3948 		else
3949 			s->first_displayed_line = 1;
3950 		break;
3951 	case 'j':
3952 	case KEY_DOWN:
3953 		if (s->selected_line < view->nlines - 2 &&
3954 		    s->first_displayed_line +
3955 		    s->selected_line <= s->blame.nlines)
3956 			s->selected_line++;
3957 		else if (s->last_displayed_line <
3958 		    s->blame.nlines)
3959 			s->first_displayed_line++;
3960 		break;
3961 	case 'b':
3962 	case 'p': {
3963 		struct got_object_id *id = NULL;
3964 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
3965 		    s->first_displayed_line, s->selected_line);
3966 		if (id == NULL)
3967 			break;
3968 		if (ch == 'p') {
3969 			struct got_commit_object *commit;
3970 			struct got_object_qid *pid;
3971 			struct got_object_id *blob_id = NULL;
3972 			int obj_type;
3973 			err = got_object_open_as_commit(&commit,
3974 			    s->repo, id);
3975 			if (err)
3976 				break;
3977 			pid = SIMPLEQ_FIRST(
3978 			    got_object_commit_get_parent_ids(commit));
3979 			if (pid == NULL) {
3980 				got_object_commit_close(commit);
3981 				break;
3982 			}
3983 			/* Check if path history ends here. */
3984 			err = got_object_id_by_path(&blob_id, s->repo,
3985 			    pid->id, s->path);
3986 			if (err) {
3987 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
3988 					err = NULL;
3989 				got_object_commit_close(commit);
3990 				break;
3991 			}
3992 			err = got_object_get_type(&obj_type, s->repo,
3993 			    blob_id);
3994 			free(blob_id);
3995 			/* Can't blame non-blob type objects. */
3996 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
3997 				got_object_commit_close(commit);
3998 				break;
3999 			}
4000 			err = got_object_qid_alloc(&s->blamed_commit,
4001 			    pid->id);
4002 			got_object_commit_close(commit);
4003 		} else {
4004 			if (got_object_id_cmp(id,
4005 			    s->blamed_commit->id) == 0)
4006 				break;
4007 			err = got_object_qid_alloc(&s->blamed_commit,
4008 			    id);
4009 		}
4010 		if (err)
4011 			break;
4012 		s->done = 1;
4013 		thread_err = stop_blame(&s->blame);
4014 		s->done = 0;
4015 		if (thread_err)
4016 			break;
4017 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
4018 		    s->blamed_commit, entry);
4019 		err = run_blame(&s->blame, view, &s->blame_complete,
4020 		    &s->first_displayed_line, &s->last_displayed_line,
4021 		    &s->selected_line, &s->done, &s->eof,
4022 		    s->path, s->blamed_commit->id, s->repo);
4023 		if (err)
4024 			break;
4025 		break;
4026 	}
4027 	case 'B': {
4028 		struct got_object_qid *first;
4029 		first = SIMPLEQ_FIRST(&s->blamed_commits);
4030 		if (!got_object_id_cmp(first->id, s->commit_id))
4031 			break;
4032 		s->done = 1;
4033 		thread_err = stop_blame(&s->blame);
4034 		s->done = 0;
4035 		if (thread_err)
4036 			break;
4037 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4038 		got_object_qid_free(s->blamed_commit);
4039 		s->blamed_commit =
4040 		    SIMPLEQ_FIRST(&s->blamed_commits);
4041 		err = run_blame(&s->blame, view, &s->blame_complete,
4042 		    &s->first_displayed_line, &s->last_displayed_line,
4043 		    &s->selected_line, &s->done, &s->eof, s->path,
4044 		    s->blamed_commit->id, s->repo);
4045 		if (err)
4046 			break;
4047 		break;
4048 	}
4049 	case KEY_ENTER:
4050 	case '\r': {
4051 		struct got_object_id *id = NULL;
4052 		struct got_object_qid *pid;
4053 		struct got_commit_object *commit = NULL;
4054 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4055 		    s->first_displayed_line, s->selected_line);
4056 		if (id == NULL)
4057 			break;
4058 		err = got_object_open_as_commit(&commit, s->repo, id);
4059 		if (err)
4060 			break;
4061 		pid = SIMPLEQ_FIRST(
4062 		    got_object_commit_get_parent_ids(commit));
4063 		if (view_is_parent_view(view))
4064 		    begin_x = view_split_begin_x(view->begin_x);
4065 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
4066 		if (diff_view == NULL) {
4067 			got_object_commit_close(commit);
4068 			err = got_error_from_errno("view_open");
4069 			break;
4070 		}
4071 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
4072 		    id, NULL, s->refs, s->repo);
4073 		got_object_commit_close(commit);
4074 		if (err) {
4075 			view_close(diff_view);
4076 			break;
4077 		}
4078 		if (view_is_parent_view(view)) {
4079 			err = view_close_child(view);
4080 			if (err)
4081 				break;
4082 			err = view_set_child(view, diff_view);
4083 			if (err) {
4084 				view_close(diff_view);
4085 				break;
4086 			}
4087 			*focus_view = diff_view;
4088 			view->child_focussed = 1;
4089 		} else
4090 			*new_view = diff_view;
4091 		if (err)
4092 			break;
4093 		break;
4094 	}
4095 	case KEY_NPAGE:
4096 	case ' ':
4097 		if (s->last_displayed_line >= s->blame.nlines &&
4098 		    s->selected_line >= MIN(s->blame.nlines,
4099 		    view->nlines - 2)) {
4100 			break;
4101 		}
4102 		if (s->last_displayed_line >= s->blame.nlines &&
4103 		    s->selected_line < view->nlines - 2) {
4104 			s->selected_line = MIN(s->blame.nlines,
4105 			    view->nlines - 2);
4106 			break;
4107 		}
4108 		if (s->last_displayed_line + view->nlines - 2
4109 		    <= s->blame.nlines)
4110 			s->first_displayed_line +=
4111 			    view->nlines - 2;
4112 		else
4113 			s->first_displayed_line =
4114 			    s->blame.nlines -
4115 			    (view->nlines - 3);
4116 		break;
4117 	case KEY_RESIZE:
4118 		if (s->selected_line > view->nlines - 2) {
4119 			s->selected_line = MIN(s->blame.nlines,
4120 			    view->nlines - 2);
4121 		}
4122 		break;
4123 	default:
4124 		break;
4125 	}
4126 	return thread_err ? thread_err : err;
4127 }
4128 
4129 static const struct got_error *
4130 cmd_blame(int argc, char *argv[])
4131 {
4132 	const struct got_error *error;
4133 	struct got_repository *repo = NULL;
4134 	struct got_reflist_head refs;
4135 	struct got_worktree *worktree = NULL;
4136 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4137 	struct got_object_id *commit_id = NULL;
4138 	char *commit_id_str = NULL;
4139 	int ch;
4140 	struct tog_view *view;
4141 
4142 	SIMPLEQ_INIT(&refs);
4143 
4144 #ifndef PROFILE
4145 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4146 	    NULL) == -1)
4147 		err(1, "pledge");
4148 #endif
4149 
4150 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
4151 		switch (ch) {
4152 		case 'c':
4153 			commit_id_str = optarg;
4154 			break;
4155 		case 'r':
4156 			repo_path = realpath(optarg, NULL);
4157 			if (repo_path == NULL)
4158 				return got_error_from_errno2("realpath",
4159 				    optarg);
4160 			break;
4161 		default:
4162 			usage_blame();
4163 			/* NOTREACHED */
4164 		}
4165 	}
4166 
4167 	argc -= optind;
4168 	argv += optind;
4169 
4170 	if (argc == 1)
4171 		path = argv[0];
4172 	else
4173 		usage_blame();
4174 
4175 	cwd = getcwd(NULL, 0);
4176 	if (cwd == NULL) {
4177 		error = got_error_from_errno("getcwd");
4178 		goto done;
4179 	}
4180 	if (repo_path == NULL) {
4181 		error = got_worktree_open(&worktree, cwd);
4182 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4183 			goto done;
4184 		else
4185 			error = NULL;
4186 		if (worktree) {
4187 			repo_path =
4188 			    strdup(got_worktree_get_repo_path(worktree));
4189 			if (repo_path == NULL)
4190 				error = got_error_from_errno("strdup");
4191 			if (error)
4192 				goto done;
4193 		} else {
4194 			repo_path = strdup(cwd);
4195 			if (repo_path == NULL) {
4196 				error = got_error_from_errno("strdup");
4197 				goto done;
4198 			}
4199 		}
4200 	}
4201 
4202 	init_curses();
4203 
4204 	error = got_repo_open(&repo, repo_path, NULL);
4205 	if (error != NULL)
4206 		goto done;
4207 
4208 	error = apply_unveil(got_repo_get_path(repo), NULL);
4209 	if (error)
4210 		goto done;
4211 
4212 	if (worktree) {
4213 		const char *prefix = got_worktree_get_path_prefix(worktree);
4214 		char *p, *worktree_subdir = cwd +
4215 		    strlen(got_worktree_get_root_path(worktree));
4216 		if (asprintf(&p, "%s%s%s%s%s",
4217 		    prefix, (strcmp(prefix, "/") != 0) ? "/" : "",
4218 		    worktree_subdir, worktree_subdir[0] ? "/" : "",
4219 		    path) == -1) {
4220 			error = got_error_from_errno("asprintf");
4221 			goto done;
4222 		}
4223 		error = got_repo_map_path(&in_repo_path, repo, p, 0);
4224 		free(p);
4225 	} else {
4226 		error = got_repo_map_path(&in_repo_path, repo, path, 1);
4227 	}
4228 	if (error)
4229 		goto done;
4230 
4231 	if (commit_id_str == NULL) {
4232 		struct got_reference *head_ref;
4233 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0);
4234 		if (error != NULL)
4235 			goto done;
4236 		error = got_ref_resolve(&commit_id, repo, head_ref);
4237 		got_ref_close(head_ref);
4238 	} else {
4239 		error = got_repo_match_object_id(&commit_id, NULL,
4240 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, 1, repo);
4241 	}
4242 	if (error != NULL)
4243 		goto done;
4244 
4245 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
4246 	if (error)
4247 		goto done;
4248 
4249 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
4250 	if (view == NULL) {
4251 		error = got_error_from_errno("view_open");
4252 		goto done;
4253 	}
4254 	error = open_blame_view(view, in_repo_path, commit_id, &refs, repo);
4255 	if (error)
4256 		goto done;
4257 	if (worktree) {
4258 		/* Release work tree lock. */
4259 		got_worktree_close(worktree);
4260 		worktree = NULL;
4261 	}
4262 	error = view_loop(view);
4263 done:
4264 	free(repo_path);
4265 	free(cwd);
4266 	free(commit_id);
4267 	if (worktree)
4268 		got_worktree_close(worktree);
4269 	if (repo)
4270 		got_repo_close(repo);
4271 	got_ref_list_free(&refs);
4272 	return error;
4273 }
4274 
4275 static const struct got_error *
4276 draw_tree_entries(struct tog_view *view,
4277     struct got_tree_entry **first_displayed_entry,
4278     struct got_tree_entry **last_displayed_entry,
4279     struct got_tree_entry **selected_entry, int *ndisplayed,
4280     const char *label, int show_ids, const char *parent_path,
4281     struct got_tree_object *tree, int selected, int limit,
4282     int isroot, struct tog_colors *colors)
4283 {
4284 	const struct got_error *err = NULL;
4285 	struct got_tree_entry *te;
4286 	wchar_t *wline;
4287 	struct tog_color *tc;
4288 	int width, n, i, nentries;
4289 
4290 	*ndisplayed = 0;
4291 
4292 	werase(view->window);
4293 
4294 	if (limit == 0)
4295 		return NULL;
4296 
4297 	err = format_line(&wline, &width, label, view->ncols, 0);
4298 	if (err)
4299 		return err;
4300 	if (view_needs_focus_indication(view))
4301 		wstandout(view->window);
4302 	tc = get_color(colors, TOG_COLOR_COMMIT);
4303 	if (tc)
4304 		wattr_on(view->window,
4305 		    COLOR_PAIR(tc->colorpair), NULL);
4306 	waddwstr(view->window, wline);
4307 	if (tc)
4308 		wattr_off(view->window,
4309 		    COLOR_PAIR(tc->colorpair), NULL);
4310 	if (view_needs_focus_indication(view))
4311 		wstandend(view->window);
4312 	free(wline);
4313 	wline = NULL;
4314 	if (width < view->ncols - 1)
4315 		waddch(view->window, '\n');
4316 	if (--limit <= 0)
4317 		return NULL;
4318 	err = format_line(&wline, &width, parent_path, view->ncols, 0);
4319 	if (err)
4320 		return err;
4321 	waddwstr(view->window, wline);
4322 	free(wline);
4323 	wline = NULL;
4324 	if (width < view->ncols - 1)
4325 		waddch(view->window, '\n');
4326 	if (--limit <= 0)
4327 		return NULL;
4328 	waddch(view->window, '\n');
4329 	if (--limit <= 0)
4330 		return NULL;
4331 
4332 	if (*first_displayed_entry == NULL) {
4333 		te = got_object_tree_get_first_entry(tree);
4334 		if (selected == 0) {
4335 			if (view->focussed)
4336 				wstandout(view->window);
4337 			*selected_entry = NULL;
4338 		}
4339 		waddstr(view->window, "  ..\n");	/* parent directory */
4340 		if (selected == 0 && view->focussed)
4341 			wstandend(view->window);
4342 		(*ndisplayed)++;
4343 		if (--limit <= 0)
4344 			return NULL;
4345 		n = 1;
4346 	} else {
4347 		n = 0;
4348 		te = *first_displayed_entry;
4349 	}
4350 
4351 	nentries = got_object_tree_get_nentries(tree);
4352 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
4353 		char *line = NULL, *id_str = NULL;
4354 		const char *modestr = "";
4355 		mode_t mode;
4356 
4357 		te = got_object_tree_get_entry(tree, i);
4358 		mode = got_tree_entry_get_mode(te);
4359 
4360 		if (show_ids) {
4361 			err = got_object_id_str(&id_str,
4362 			    got_tree_entry_get_id(te));
4363 			if (err)
4364 				return got_error_from_errno(
4365 				    "got_object_id_str");
4366 		}
4367 		if (got_object_tree_entry_is_submodule(te))
4368 			modestr = "$";
4369 		else if (S_ISLNK(mode))
4370 			modestr = "@";
4371 		else if (S_ISDIR(mode))
4372 			modestr = "/";
4373 		else if (mode & S_IXUSR)
4374 			modestr = "*";
4375 		if (asprintf(&line, "%s  %s%s", id_str ? id_str : "",
4376 		    got_tree_entry_get_name(te), modestr) == -1) {
4377 			free(id_str);
4378 			return got_error_from_errno("asprintf");
4379 		}
4380 		free(id_str);
4381 		err = format_line(&wline, &width, line, view->ncols, 0);
4382 		if (err) {
4383 			free(line);
4384 			break;
4385 		}
4386 		if (n == selected) {
4387 			if (view->focussed)
4388 				wstandout(view->window);
4389 			*selected_entry = te;
4390 		}
4391 		tc = match_color(colors, line);
4392 		if (tc)
4393 			wattr_on(view->window,
4394 			    COLOR_PAIR(tc->colorpair), NULL);
4395 		waddwstr(view->window, wline);
4396 		if (tc)
4397 			wattr_off(view->window,
4398 			    COLOR_PAIR(tc->colorpair), NULL);
4399 		if (width < view->ncols - 1)
4400 			waddch(view->window, '\n');
4401 		if (n == selected && view->focussed)
4402 			wstandend(view->window);
4403 		free(line);
4404 		free(wline);
4405 		wline = NULL;
4406 		n++;
4407 		(*ndisplayed)++;
4408 		*last_displayed_entry = te;
4409 		if (--limit <= 0)
4410 			break;
4411 	}
4412 
4413 	return err;
4414 }
4415 
4416 static void
4417 tree_scroll_up(struct tog_view *view,
4418     struct got_tree_entry **first_displayed_entry, int maxscroll,
4419     struct got_tree_object *tree, int isroot)
4420 {
4421 	struct got_tree_entry *te;
4422 	int i;
4423 
4424 	if (*first_displayed_entry == NULL)
4425 		return;
4426 
4427 	te = got_object_tree_get_entry(tree, 0);
4428 	if (*first_displayed_entry == te) {
4429 		if (!isroot)
4430 			*first_displayed_entry = NULL;
4431 		return;
4432 	}
4433 
4434 	i = 0;
4435 	while (*first_displayed_entry && i < maxscroll) {
4436 		*first_displayed_entry = got_tree_entry_get_prev(tree,
4437 		    *first_displayed_entry);
4438 		i++;
4439 	}
4440 	if (!isroot && te == got_object_tree_get_first_entry(tree) && i < maxscroll)
4441 		*first_displayed_entry = NULL;
4442 }
4443 
4444 static int
4445 tree_scroll_down(struct got_tree_entry **first_displayed_entry, int maxscroll,
4446 	struct got_tree_entry *last_displayed_entry,
4447 	struct got_tree_object *tree)
4448 {
4449 	struct got_tree_entry *next, *last;
4450 	int n = 0;
4451 
4452 	if (*first_displayed_entry)
4453 		next = got_tree_entry_get_next(tree, *first_displayed_entry);
4454 	else
4455 		next = got_object_tree_get_first_entry(tree);
4456 
4457 	last = last_displayed_entry;
4458 	while (next && last && n++ < maxscroll) {
4459 		last = got_tree_entry_get_next(tree, last);
4460 		if (last) {
4461 			*first_displayed_entry = next;
4462 			next = got_tree_entry_get_next(tree, next);
4463 		}
4464 	}
4465 	return n;
4466 }
4467 
4468 static const struct got_error *
4469 tree_entry_path(char **path, struct tog_parent_trees *parents,
4470     struct got_tree_entry *te)
4471 {
4472 	const struct got_error *err = NULL;
4473 	struct tog_parent_tree *pt;
4474 	size_t len = 2; /* for leading slash and NUL */
4475 
4476 	TAILQ_FOREACH(pt, parents, entry)
4477 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
4478 		    + 1 /* slash */;
4479 	if (te)
4480 		len += strlen(got_tree_entry_get_name(te));
4481 
4482 	*path = calloc(1, len);
4483 	if (path == NULL)
4484 		return got_error_from_errno("calloc");
4485 
4486 	(*path)[0] = '/';
4487 	pt = TAILQ_LAST(parents, tog_parent_trees);
4488 	while (pt) {
4489 		const char *name = got_tree_entry_get_name(pt->selected_entry);
4490 		if (strlcat(*path, name, len) >= len) {
4491 			err = got_error(GOT_ERR_NO_SPACE);
4492 			goto done;
4493 		}
4494 		if (strlcat(*path, "/", len) >= len) {
4495 			err = got_error(GOT_ERR_NO_SPACE);
4496 			goto done;
4497 		}
4498 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
4499 	}
4500 	if (te) {
4501 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
4502 			err = got_error(GOT_ERR_NO_SPACE);
4503 			goto done;
4504 		}
4505 	}
4506 done:
4507 	if (err) {
4508 		free(*path);
4509 		*path = NULL;
4510 	}
4511 	return err;
4512 }
4513 
4514 static const struct got_error *
4515 blame_tree_entry(struct tog_view **new_view, int begin_x,
4516     struct got_tree_entry *te, struct tog_parent_trees *parents,
4517     struct got_object_id *commit_id, struct got_reflist_head *refs,
4518     struct got_repository *repo)
4519 {
4520 	const struct got_error *err = NULL;
4521 	char *path;
4522 	struct tog_view *blame_view;
4523 
4524 	*new_view = NULL;
4525 
4526 	err = tree_entry_path(&path, parents, te);
4527 	if (err)
4528 		return err;
4529 
4530 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
4531 	if (blame_view == NULL) {
4532 		err = got_error_from_errno("view_open");
4533 		goto done;
4534 	}
4535 
4536 	err = open_blame_view(blame_view, path, commit_id, refs, repo);
4537 	if (err) {
4538 		if (err->code == GOT_ERR_CANCELLED)
4539 			err = NULL;
4540 		view_close(blame_view);
4541 	} else
4542 		*new_view = blame_view;
4543 done:
4544 	free(path);
4545 	return err;
4546 }
4547 
4548 static const struct got_error *
4549 log_tree_entry(struct tog_view **new_view, int begin_x,
4550     struct got_tree_entry *te, struct tog_parent_trees *parents,
4551     struct got_object_id *commit_id, struct got_reflist_head *refs,
4552     struct got_repository *repo)
4553 {
4554 	struct tog_view *log_view;
4555 	const struct got_error *err = NULL;
4556 	char *path;
4557 
4558 	*new_view = NULL;
4559 
4560 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
4561 	if (log_view == NULL)
4562 		return got_error_from_errno("view_open");
4563 
4564 	err = tree_entry_path(&path, parents, te);
4565 	if (err)
4566 		return err;
4567 
4568 	err = open_log_view(log_view, commit_id, refs, repo, NULL, path, 0, 0);
4569 	if (err)
4570 		view_close(log_view);
4571 	else
4572 		*new_view = log_view;
4573 	free(path);
4574 	return err;
4575 }
4576 
4577 static const struct got_error *
4578 open_tree_view(struct tog_view *view, struct got_tree_object *root,
4579     struct got_object_id *commit_id, struct got_reflist_head *refs,
4580     struct got_repository *repo)
4581 {
4582 	const struct got_error *err = NULL;
4583 	char *commit_id_str = NULL;
4584 	struct tog_tree_view_state *s = &view->state.tree;
4585 
4586 	TAILQ_INIT(&s->parents);
4587 
4588 	err = got_object_id_str(&commit_id_str, commit_id);
4589 	if (err != NULL)
4590 		goto done;
4591 
4592 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
4593 		err = got_error_from_errno("asprintf");
4594 		goto done;
4595 	}
4596 
4597 	s->root = s->tree = root;
4598 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
4599 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
4600 	s->commit_id = got_object_id_dup(commit_id);
4601 	if (s->commit_id == NULL) {
4602 		err = got_error_from_errno("got_object_id_dup");
4603 		goto done;
4604 	}
4605 	s->refs = refs;
4606 	s->repo = repo;
4607 
4608 	SIMPLEQ_INIT(&s->colors);
4609 
4610 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4611 		err = add_color(&s->colors, "\\$$",
4612 		    TOG_COLOR_TREE_SUBMODULE,
4613 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
4614 		if (err)
4615 			goto done;
4616 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
4617 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
4618 		if (err) {
4619 			free_colors(&s->colors);
4620 			goto done;
4621 		}
4622 		err = add_color(&s->colors, "/$",
4623 		    TOG_COLOR_TREE_DIRECTORY,
4624 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
4625 		if (err) {
4626 			free_colors(&s->colors);
4627 			goto done;
4628 		}
4629 
4630 		err = add_color(&s->colors, "\\*$",
4631 		    TOG_COLOR_TREE_EXECUTABLE,
4632 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
4633 		if (err) {
4634 			free_colors(&s->colors);
4635 			goto done;
4636 		}
4637 
4638 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
4639 		    get_color_value("TOG_COLOR_COMMIT"));
4640 		if (err) {
4641 			free_colors(&s->colors);
4642 			goto done;
4643 		}
4644 	}
4645 
4646 	view->show = show_tree_view;
4647 	view->input = input_tree_view;
4648 	view->close = close_tree_view;
4649 	view->search_start = search_start_tree_view;
4650 	view->search_next = search_next_tree_view;
4651 done:
4652 	free(commit_id_str);
4653 	if (err) {
4654 		free(s->tree_label);
4655 		s->tree_label = NULL;
4656 	}
4657 	return err;
4658 }
4659 
4660 static const struct got_error *
4661 close_tree_view(struct tog_view *view)
4662 {
4663 	struct tog_tree_view_state *s = &view->state.tree;
4664 
4665 	free_colors(&s->colors);
4666 	free(s->tree_label);
4667 	s->tree_label = NULL;
4668 	free(s->commit_id);
4669 	s->commit_id = NULL;
4670 	while (!TAILQ_EMPTY(&s->parents)) {
4671 		struct tog_parent_tree *parent;
4672 		parent = TAILQ_FIRST(&s->parents);
4673 		TAILQ_REMOVE(&s->parents, parent, entry);
4674 		free(parent);
4675 
4676 	}
4677 	if (s->tree != s->root)
4678 		got_object_tree_close(s->tree);
4679 	got_object_tree_close(s->root);
4680 
4681 	return NULL;
4682 }
4683 
4684 static const struct got_error *
4685 search_start_tree_view(struct tog_view *view)
4686 {
4687 	struct tog_tree_view_state *s = &view->state.tree;
4688 
4689 	s->matched_entry = NULL;
4690 	return NULL;
4691 }
4692 
4693 static int
4694 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
4695 {
4696 	regmatch_t regmatch;
4697 
4698 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
4699 	    0) == 0;
4700 }
4701 
4702 static const struct got_error *
4703 search_next_tree_view(struct tog_view *view)
4704 {
4705 	struct tog_tree_view_state *s = &view->state.tree;
4706 	struct got_tree_entry *te = NULL;
4707 
4708 	if (!view->searching) {
4709 		view->search_next_done = 1;
4710 		return NULL;
4711 	}
4712 
4713 	if (s->matched_entry) {
4714 		if (view->searching == TOG_SEARCH_FORWARD) {
4715 			if (s->selected_entry)
4716 				te = got_tree_entry_get_next(s->tree,
4717 				    s->selected_entry);
4718 			else
4719 				te = got_object_tree_get_first_entry(s->tree);
4720 		} else {
4721 			if (s->selected_entry == NULL)
4722 				te = got_object_tree_get_last_entry(s->tree);
4723 			else
4724 				te = got_tree_entry_get_prev(s->tree,
4725 				    s->selected_entry);
4726 		}
4727 	} else {
4728 		if (view->searching == TOG_SEARCH_FORWARD)
4729 			te = got_object_tree_get_first_entry(s->tree);
4730 		else
4731 			te = got_object_tree_get_last_entry(s->tree);
4732 	}
4733 
4734 	while (1) {
4735 		if (te == NULL) {
4736 			if (s->matched_entry == NULL) {
4737 				view->search_next_done = 1;
4738 				return NULL;
4739 			}
4740 			if (view->searching == TOG_SEARCH_FORWARD)
4741 				te = got_object_tree_get_first_entry(s->tree);
4742 			else
4743 				te = got_object_tree_get_last_entry(s->tree);
4744 		}
4745 
4746 		if (match_tree_entry(te, &view->regex)) {
4747 			view->search_next_done = 1;
4748 			s->matched_entry = te;
4749 			break;
4750 		}
4751 
4752 		if (view->searching == TOG_SEARCH_FORWARD)
4753 			te = got_tree_entry_get_next(s->tree, te);
4754 		else
4755 			te = got_tree_entry_get_prev(s->tree, te);
4756 	}
4757 
4758 	if (s->matched_entry) {
4759 		s->first_displayed_entry = s->matched_entry;
4760 		s->selected = 0;
4761 	}
4762 
4763 	return NULL;
4764 }
4765 
4766 static const struct got_error *
4767 show_tree_view(struct tog_view *view)
4768 {
4769 	const struct got_error *err = NULL;
4770 	struct tog_tree_view_state *s = &view->state.tree;
4771 	char *parent_path;
4772 
4773 	err = tree_entry_path(&parent_path, &s->parents, NULL);
4774 	if (err)
4775 		return err;
4776 
4777 	err = draw_tree_entries(view, &s->first_displayed_entry,
4778 	    &s->last_displayed_entry, &s->selected_entry,
4779 	    &s->ndisplayed, s->tree_label, s->show_ids, parent_path,
4780 	    s->tree, s->selected, view->nlines, s->tree == s->root,
4781 	    &s->colors);
4782 	free(parent_path);
4783 
4784 	view_vborder(view);
4785 	return err;
4786 }
4787 
4788 static const struct got_error *
4789 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
4790     struct tog_view **focus_view, struct tog_view *view, int ch)
4791 {
4792 	const struct got_error *err = NULL;
4793 	struct tog_tree_view_state *s = &view->state.tree;
4794 	struct tog_view *log_view;
4795 	int begin_x = 0, nscrolled;
4796 
4797 	switch (ch) {
4798 	case 'i':
4799 		s->show_ids = !s->show_ids;
4800 		break;
4801 	case 'l':
4802 		if (!s->selected_entry)
4803 			break;
4804 		if (view_is_parent_view(view))
4805 			begin_x = view_split_begin_x(view->begin_x);
4806 		err = log_tree_entry(&log_view, begin_x,
4807 		    s->selected_entry, &s->parents,
4808 		    s->commit_id, s->refs, s->repo);
4809 		if (view_is_parent_view(view)) {
4810 			err = view_close_child(view);
4811 			if (err)
4812 				return err;
4813 			err = view_set_child(view, log_view);
4814 			if (err) {
4815 				view_close(log_view);
4816 				break;
4817 			}
4818 			*focus_view = log_view;
4819 			view->child_focussed = 1;
4820 		} else
4821 			*new_view = log_view;
4822 		break;
4823 	case 'k':
4824 	case KEY_UP:
4825 		if (s->selected > 0) {
4826 			s->selected--;
4827 			if (s->selected == 0)
4828 				break;
4829 		}
4830 		if (s->selected > 0)
4831 			break;
4832 		tree_scroll_up(view, &s->first_displayed_entry, 1,
4833 		    s->tree, s->tree == s->root);
4834 		break;
4835 	case KEY_PPAGE:
4836 		tree_scroll_up(view, &s->first_displayed_entry,
4837 		    MAX(0, view->nlines - 4 - s->selected), s->tree,
4838 		    s->tree == s->root);
4839 		s->selected = 0;
4840 		if (got_object_tree_get_first_entry(s->tree) ==
4841 		    s->first_displayed_entry && s->tree != s->root)
4842 			s->first_displayed_entry = NULL;
4843 		break;
4844 	case 'j':
4845 	case KEY_DOWN:
4846 		if (s->selected < s->ndisplayed - 1) {
4847 			s->selected++;
4848 			break;
4849 		}
4850 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
4851 		    == NULL)
4852 			/* can't scroll any further */
4853 			break;
4854 		tree_scroll_down(&s->first_displayed_entry, 1,
4855 		    s->last_displayed_entry, s->tree);
4856 		break;
4857 	case KEY_NPAGE:
4858 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
4859 		    == NULL) {
4860 			/* can't scroll any further; move cursor down */
4861 			if (s->selected < s->ndisplayed - 1)
4862 				s->selected = s->ndisplayed - 1;
4863 			break;
4864 		}
4865 		nscrolled = tree_scroll_down(&s->first_displayed_entry,
4866 		    view->nlines, s->last_displayed_entry, s->tree);
4867 		if (nscrolled < view->nlines) {
4868 			int ndisplayed = 0;
4869 			struct got_tree_entry *te;
4870 			te = s->first_displayed_entry;
4871 			do {
4872 				ndisplayed++;
4873 				te = got_tree_entry_get_next(s->tree, te);
4874 			} while (te);
4875 			s->selected = ndisplayed - 1;
4876 		}
4877 		break;
4878 	case KEY_ENTER:
4879 	case '\r':
4880 	case KEY_BACKSPACE:
4881 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
4882 			struct tog_parent_tree *parent;
4883 			/* user selected '..' */
4884 			if (s->tree == s->root)
4885 				break;
4886 			parent = TAILQ_FIRST(&s->parents);
4887 			TAILQ_REMOVE(&s->parents, parent,
4888 			    entry);
4889 			got_object_tree_close(s->tree);
4890 			s->tree = parent->tree;
4891 			s->first_displayed_entry =
4892 			    parent->first_displayed_entry;
4893 			s->selected_entry =
4894 			    parent->selected_entry;
4895 			s->selected = parent->selected;
4896 			free(parent);
4897 		} else if (S_ISDIR(got_tree_entry_get_mode(
4898 		    s->selected_entry))) {
4899 			struct got_tree_object *subtree;
4900 			err = got_object_open_as_tree(&subtree, s->repo,
4901 			    got_tree_entry_get_id(s->selected_entry));
4902 			if (err)
4903 				break;
4904 			err = tree_view_visit_subtree(subtree, s);
4905 			if (err) {
4906 				got_object_tree_close(subtree);
4907 				break;
4908 			}
4909 		} else if (S_ISREG(got_tree_entry_get_mode(
4910 		    s->selected_entry))) {
4911 			struct tog_view *blame_view;
4912 			int begin_x = view_is_parent_view(view) ?
4913 			    view_split_begin_x(view->begin_x) : 0;
4914 
4915 			err = blame_tree_entry(&blame_view, begin_x,
4916 			    s->selected_entry, &s->parents,
4917 			    s->commit_id, s->refs, s->repo);
4918 			if (err)
4919 				break;
4920 			if (view_is_parent_view(view)) {
4921 				err = view_close_child(view);
4922 				if (err)
4923 					return err;
4924 				err = view_set_child(view, blame_view);
4925 				if (err) {
4926 					view_close(blame_view);
4927 					break;
4928 				}
4929 				*focus_view = blame_view;
4930 				view->child_focussed = 1;
4931 			} else
4932 				*new_view = blame_view;
4933 		}
4934 		break;
4935 	case KEY_RESIZE:
4936 		if (s->selected > view->nlines)
4937 			s->selected = s->ndisplayed - 1;
4938 		break;
4939 	default:
4940 		break;
4941 	}
4942 
4943 	return err;
4944 }
4945 
4946 __dead static void
4947 usage_tree(void)
4948 {
4949 	endwin();
4950 	fprintf(stderr, "usage: %s tree [-c commit] [repository-path]\n",
4951 	    getprogname());
4952 	exit(1);
4953 }
4954 
4955 static const struct got_error *
4956 cmd_tree(int argc, char *argv[])
4957 {
4958 	const struct got_error *error;
4959 	struct got_repository *repo = NULL;
4960 	struct got_reflist_head refs;
4961 	char *repo_path = NULL;
4962 	struct got_object_id *commit_id = NULL;
4963 	char *commit_id_arg = NULL;
4964 	struct got_commit_object *commit = NULL;
4965 	struct got_tree_object *tree = NULL;
4966 	int ch;
4967 	struct tog_view *view;
4968 
4969 	SIMPLEQ_INIT(&refs);
4970 
4971 #ifndef PROFILE
4972 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4973 	    NULL) == -1)
4974 		err(1, "pledge");
4975 #endif
4976 
4977 	while ((ch = getopt(argc, argv, "c:")) != -1) {
4978 		switch (ch) {
4979 		case 'c':
4980 			commit_id_arg = optarg;
4981 			break;
4982 		default:
4983 			usage_tree();
4984 			/* NOTREACHED */
4985 		}
4986 	}
4987 
4988 	argc -= optind;
4989 	argv += optind;
4990 
4991 	if (argc == 0) {
4992 		struct got_worktree *worktree;
4993 		char *cwd = getcwd(NULL, 0);
4994 		if (cwd == NULL)
4995 			return got_error_from_errno("getcwd");
4996 		error = got_worktree_open(&worktree, cwd);
4997 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4998 			goto done;
4999 		if (worktree) {
5000 			free(cwd);
5001 			repo_path =
5002 			    strdup(got_worktree_get_repo_path(worktree));
5003 			got_worktree_close(worktree);
5004 		} else
5005 			repo_path = cwd;
5006 		if (repo_path == NULL) {
5007 			error = got_error_from_errno("strdup");
5008 			goto done;
5009 		}
5010 	} else if (argc == 1) {
5011 		repo_path = realpath(argv[0], NULL);
5012 		if (repo_path == NULL)
5013 			return got_error_from_errno2("realpath", argv[0]);
5014 	} else
5015 		usage_tree();
5016 
5017 	init_curses();
5018 
5019 	error = got_repo_open(&repo, repo_path, NULL);
5020 	if (error != NULL)
5021 		goto done;
5022 
5023 	error = apply_unveil(got_repo_get_path(repo), NULL);
5024 	if (error)
5025 		goto done;
5026 
5027 	error = got_repo_match_object_id(&commit_id, NULL,
5028 	    commit_id_arg ? commit_id_arg : GOT_REF_HEAD,
5029 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
5030 	if (error != NULL)
5031 		goto done;
5032 
5033 	error = got_object_open_as_commit(&commit, repo, commit_id);
5034 	if (error != NULL)
5035 		goto done;
5036 
5037 	error = got_object_open_as_tree(&tree, repo,
5038 	    got_object_commit_get_tree_id(commit));
5039 	if (error != NULL)
5040 		goto done;
5041 
5042 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
5043 	if (error)
5044 		goto done;
5045 
5046 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
5047 	if (view == NULL) {
5048 		error = got_error_from_errno("view_open");
5049 		goto done;
5050 	}
5051 	error = open_tree_view(view, tree, commit_id, &refs, repo);
5052 	if (error)
5053 		goto done;
5054 	error = view_loop(view);
5055 done:
5056 	free(repo_path);
5057 	free(commit_id);
5058 	if (commit)
5059 		got_object_commit_close(commit);
5060 	if (tree)
5061 		got_object_tree_close(tree);
5062 	if (repo)
5063 		got_repo_close(repo);
5064 	got_ref_list_free(&refs);
5065 	return error;
5066 }
5067 
5068 static void
5069 list_commands(void)
5070 {
5071 	int i;
5072 
5073 	fprintf(stderr, "commands:");
5074 	for (i = 0; i < nitems(tog_commands); i++) {
5075 		struct tog_cmd *cmd = &tog_commands[i];
5076 		fprintf(stderr, " %s", cmd->name);
5077 	}
5078 	fputc('\n', stderr);
5079 }
5080 
5081 __dead static void
5082 usage(int hflag)
5083 {
5084 	fprintf(stderr, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
5085 	    getprogname());
5086 	if (hflag)
5087 		list_commands();
5088 	exit(1);
5089 }
5090 
5091 static char **
5092 make_argv(const char *arg0, const char *arg1)
5093 {
5094 	char **argv;
5095 	int argc = (arg1 == NULL ? 1 : 2);
5096 
5097 	argv = calloc(argc, sizeof(char *));
5098 	if (argv == NULL)
5099 		err(1, "calloc");
5100 	argv[0] = strdup(arg0);
5101 	if (argv[0] == NULL)
5102 		err(1, "strdup");
5103 	if (arg1) {
5104 		argv[1] = strdup(arg1);
5105 		if (argv[1] == NULL)
5106 			err(1, "strdup");
5107 	}
5108 
5109 	return argv;
5110 }
5111 
5112 int
5113 main(int argc, char *argv[])
5114 {
5115 	const struct got_error *error = NULL;
5116 	struct tog_cmd *cmd = NULL;
5117 	int ch, hflag = 0, Vflag = 0;
5118 	char **cmd_argv = NULL;
5119 	static struct option longopts[] = {
5120 	     { "version", no_argument, NULL, 'V' },
5121 	     { NULL, 0, NULL, 0}
5122 	};
5123 
5124 	setlocale(LC_CTYPE, "");
5125 
5126 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
5127 		switch (ch) {
5128 		case 'h':
5129 			hflag = 1;
5130 			break;
5131 		case 'V':
5132 			Vflag = 1;
5133 			break;
5134 		default:
5135 			usage(hflag);
5136 			/* NOTREACHED */
5137 		}
5138 	}
5139 
5140 	argc -= optind;
5141 	argv += optind;
5142 	optind = 0;
5143 	optreset = 1;
5144 
5145 	if (Vflag) {
5146 		got_version_print_str();
5147 		return 1;
5148 	}
5149 
5150 	if (argc == 0) {
5151 		if (hflag)
5152 			usage(hflag);
5153 		/* Build an argument vector which runs a default command. */
5154 		cmd = &tog_commands[0];
5155 		cmd_argv = make_argv(cmd->name, NULL);
5156 		argc = 1;
5157 	} else {
5158 		int i;
5159 
5160 		/* Did the user specific a command? */
5161 		for (i = 0; i < nitems(tog_commands); i++) {
5162 			if (strncmp(tog_commands[i].name, argv[0],
5163 			    strlen(argv[0])) == 0) {
5164 				cmd = &tog_commands[i];
5165 				break;
5166 			}
5167 		}
5168 
5169 		if (cmd == NULL) {
5170 			fprintf(stderr, "%s: unknown command '%s'\n",
5171 			    getprogname(), argv[0]);
5172 			list_commands();
5173 			return 1;
5174 		}
5175 	}
5176 
5177 	if (hflag)
5178 		cmd->cmd_usage();
5179 	else
5180 		error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
5181 
5182 	endwin();
5183 	free(cmd_argv);
5184 	if (error && error->code != GOT_ERR_CANCELLED)
5185 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
5186 	return 0;
5187 }