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