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