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_log_view_state *s, int maxscroll)
1687 {
1688 	struct commit_queue_entry *entry;
1689 	int nscrolled = 0;
1690 
1691 	entry = TAILQ_FIRST(&s->commits.head);
1692 	if (s->first_displayed_entry == entry)
1693 		return;
1694 
1695 	entry = s->first_displayed_entry;
1696 	while (entry && nscrolled < maxscroll) {
1697 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1698 		if (entry) {
1699 			s->first_displayed_entry = entry;
1700 			nscrolled++;
1701 		}
1702 	}
1703 }
1704 
1705 static const struct got_error *
1706 trigger_log_thread(struct tog_view *view, int wait)
1707 {
1708 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1709 	int errcode;
1710 
1711 	halfdelay(1); /* fast refresh while loading commits */
1712 
1713 	while (ta->commits_needed > 0) {
1714 		if (ta->log_complete)
1715 			break;
1716 
1717 		/* Wake the log thread. */
1718 		errcode = pthread_cond_signal(&ta->need_commits);
1719 		if (errcode)
1720 			return got_error_set_errno(errcode,
1721 			    "pthread_cond_signal");
1722 
1723 		/*
1724 		 * The mutex will be released while the view loop waits
1725 		 * in wgetch(), at which time the log thread will run.
1726 		 */
1727 		if (!wait)
1728 			break;
1729 
1730 		/* Display progress update in log view. */
1731 		show_log_view(view);
1732 		update_panels();
1733 		doupdate();
1734 
1735 		/* Wait right here while next commit is being loaded. */
1736 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1737 		if (errcode)
1738 			return got_error_set_errno(errcode,
1739 			    "pthread_cond_wait");
1740 
1741 		/* Display progress update in log view. */
1742 		show_log_view(view);
1743 		update_panels();
1744 		doupdate();
1745 	}
1746 
1747 	return NULL;
1748 }
1749 
1750 static const struct got_error *
1751 log_scroll_down(struct tog_view *view, int maxscroll)
1752 {
1753 	struct tog_log_view_state *s = &view->state.log;
1754 	const struct got_error *err = NULL;
1755 	struct commit_queue_entry *pentry;
1756 	int nscrolled = 0, ncommits_needed;
1757 
1758 	if (s->last_displayed_entry == NULL)
1759 		return NULL;
1760 
1761 	ncommits_needed = (s->last_displayed_entry)->idx + 1 + maxscroll;
1762 	if (s->commits.ncommits < ncommits_needed &&
1763 	    !s->thread_args.log_complete) {
1764 		/*
1765 		 * Ask the log thread for required amount of commits.
1766 		 */
1767 		s->thread_args.commits_needed += maxscroll;
1768 		err = trigger_log_thread(view, 1);
1769 		if (err)
1770 			return err;
1771 	}
1772 
1773 	do {
1774 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1775 		if (pentry == NULL)
1776 			break;
1777 
1778 		s->last_displayed_entry = pentry;
1779 
1780 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1781 		if (pentry == NULL)
1782 			break;
1783 		s->first_displayed_entry = pentry;
1784 	} while (++nscrolled < maxscroll);
1785 
1786 	return err;
1787 }
1788 
1789 static const struct got_error *
1790 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1791     struct got_commit_object *commit, struct got_object_id *commit_id,
1792     struct tog_view *log_view, struct got_repository *repo)
1793 {
1794 	const struct got_error *err;
1795 	struct got_object_qid *parent_id;
1796 	struct tog_view *diff_view;
1797 
1798 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1799 	if (diff_view == NULL)
1800 		return got_error_from_errno("view_open");
1801 
1802 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1803 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1804 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
1805 	if (err == NULL)
1806 		*new_view = diff_view;
1807 	return err;
1808 }
1809 
1810 static const struct got_error *
1811 tree_view_visit_subtree(struct tog_tree_view_state *s,
1812     struct got_tree_object *subtree)
1813 {
1814 	struct tog_parent_tree *parent;
1815 
1816 	parent = calloc(1, sizeof(*parent));
1817 	if (parent == NULL)
1818 		return got_error_from_errno("calloc");
1819 
1820 	parent->tree = s->tree;
1821 	parent->first_displayed_entry = s->first_displayed_entry;
1822 	parent->selected_entry = s->selected_entry;
1823 	parent->selected = s->selected;
1824 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1825 	s->tree = subtree;
1826 	s->selected = 0;
1827 	s->first_displayed_entry = NULL;
1828 	return NULL;
1829 }
1830 
1831 static const struct got_error *
1832 tree_view_walk_path(struct tog_tree_view_state *s,
1833     struct got_object_id *commit_id, const char *path)
1834 {
1835 	const struct got_error *err = NULL;
1836 	struct got_tree_object *tree = NULL;
1837 	const char *p;
1838 	char *slash, *subpath = NULL;
1839 
1840 	/* Walk the path and open corresponding tree objects. */
1841 	p = path;
1842 	while (*p) {
1843 		struct got_tree_entry *te;
1844 		struct got_object_id *tree_id;
1845 		char *te_name;
1846 
1847 		while (p[0] == '/')
1848 			p++;
1849 
1850 		/* Ensure the correct subtree entry is selected. */
1851 		slash = strchr(p, '/');
1852 		if (slash == NULL)
1853 			te_name = strdup(p);
1854 		else
1855 			te_name = strndup(p, slash - p);
1856 		if (te_name == NULL) {
1857 			err = got_error_from_errno("strndup");
1858 			break;
1859 		}
1860 		te = got_object_tree_find_entry(s->tree, te_name);
1861 		if (te == NULL) {
1862 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
1863 			free(te_name);
1864 			break;
1865 		}
1866 		free(te_name);
1867 		s->first_displayed_entry = s->selected_entry = te;
1868 
1869 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
1870 			break; /* jump to this file's entry */
1871 
1872 		slash = strchr(p, '/');
1873 		if (slash)
1874 			subpath = strndup(path, slash - path);
1875 		else
1876 			subpath = strdup(path);
1877 		if (subpath == NULL) {
1878 			err = got_error_from_errno("strdup");
1879 			break;
1880 		}
1881 
1882 		err = got_object_id_by_path(&tree_id, s->repo, commit_id,
1883 		    subpath);
1884 		if (err)
1885 			break;
1886 
1887 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
1888 		free(tree_id);
1889 		if (err)
1890 			break;
1891 
1892 		err = tree_view_visit_subtree(s, tree);
1893 		if (err) {
1894 			got_object_tree_close(tree);
1895 			break;
1896 		}
1897 		if (slash == NULL)
1898 			break;
1899 		free(subpath);
1900 		subpath = NULL;
1901 		p = slash;
1902 	}
1903 
1904 	free(subpath);
1905 	return err;
1906 }
1907 
1908 static const struct got_error *
1909 browse_commit_tree(struct tog_view **new_view, int begin_x,
1910     struct commit_queue_entry *entry, const char *path,
1911     struct got_repository *repo)
1912 {
1913 	const struct got_error *err = NULL;
1914 	struct got_tree_object *tree;
1915 	struct tog_tree_view_state *s;
1916 	struct tog_view *tree_view;
1917 
1918 	err = got_object_open_as_tree(&tree, repo,
1919 	    got_object_commit_get_tree_id(entry->commit));
1920 	if (err)
1921 		return err;
1922 
1923 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1924 	if (tree_view == NULL)
1925 		return got_error_from_errno("view_open");
1926 
1927 	err = open_tree_view(tree_view, tree, entry->id, repo);
1928 	if (err) {
1929 		got_object_tree_close(tree);
1930 		return err;
1931 	}
1932 	s = &tree_view->state.tree;
1933 
1934 	*new_view = tree_view;
1935 
1936 	if (got_path_is_root_dir(path))
1937 		return NULL;
1938 
1939 	return tree_view_walk_path(s, entry->id, path);
1940 }
1941 
1942 static const struct got_error *
1943 block_signals_used_by_main_thread(void)
1944 {
1945 	sigset_t sigset;
1946 	int errcode;
1947 
1948 	if (sigemptyset(&sigset) == -1)
1949 		return got_error_from_errno("sigemptyset");
1950 
1951 	/* tog handles SIGWINCH and SIGCONT */
1952 	if (sigaddset(&sigset, SIGWINCH) == -1)
1953 		return got_error_from_errno("sigaddset");
1954 	if (sigaddset(&sigset, SIGCONT) == -1)
1955 		return got_error_from_errno("sigaddset");
1956 
1957 	/* ncurses handles SIGTSTP */
1958 	if (sigaddset(&sigset, SIGTSTP) == -1)
1959 		return got_error_from_errno("sigaddset");
1960 
1961 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
1962 	if (errcode)
1963 		return got_error_set_errno(errcode, "pthread_sigmask");
1964 
1965 	return NULL;
1966 }
1967 
1968 static void *
1969 log_thread(void *arg)
1970 {
1971 	const struct got_error *err = NULL;
1972 	int errcode = 0;
1973 	struct tog_log_thread_args *a = arg;
1974 	int done = 0;
1975 
1976 	err = block_signals_used_by_main_thread();
1977 	if (err)
1978 		return (void *)err;
1979 
1980 	while (!done && !err && !tog_sigpipe_received) {
1981 		err = queue_commits(a->graph, a->commits, 1, a->repo,
1982 		    a->in_repo_path, a->searching, a->search_next_done,
1983 		    a->regex);
1984 		if (err) {
1985 			if (err->code != GOT_ERR_ITER_COMPLETED)
1986 				return (void *)err;
1987 			err = NULL;
1988 			done = 1;
1989 		} else if (a->commits_needed > 0)
1990 			a->commits_needed--;
1991 
1992 		errcode = pthread_mutex_lock(&tog_mutex);
1993 		if (errcode) {
1994 			err = got_error_set_errno(errcode,
1995 			    "pthread_mutex_lock");
1996 			break;
1997 		} else if (*a->quit)
1998 			done = 1;
1999 		else if (*a->first_displayed_entry == NULL) {
2000 			*a->first_displayed_entry =
2001 			    TAILQ_FIRST(&a->commits->head);
2002 			*a->selected_entry = *a->first_displayed_entry;
2003 		}
2004 
2005 		errcode = pthread_cond_signal(&a->commit_loaded);
2006 		if (errcode) {
2007 			err = got_error_set_errno(errcode,
2008 			    "pthread_cond_signal");
2009 			pthread_mutex_unlock(&tog_mutex);
2010 			break;
2011 		}
2012 
2013 		if (done)
2014 			a->commits_needed = 0;
2015 		else {
2016 			if (a->commits_needed == 0) {
2017 				errcode = pthread_cond_wait(&a->need_commits,
2018 				    &tog_mutex);
2019 				if (errcode)
2020 					err = got_error_set_errno(errcode,
2021 					    "pthread_cond_wait");
2022 			}
2023 		}
2024 
2025 		errcode = pthread_mutex_unlock(&tog_mutex);
2026 		if (errcode && err == NULL)
2027 			err = got_error_set_errno(errcode,
2028 			    "pthread_mutex_unlock");
2029 	}
2030 	a->log_complete = 1;
2031 	return (void *)err;
2032 }
2033 
2034 static const struct got_error *
2035 stop_log_thread(struct tog_log_view_state *s)
2036 {
2037 	const struct got_error *err = NULL;
2038 	int errcode;
2039 
2040 	if (s->thread) {
2041 		s->quit = 1;
2042 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2043 		if (errcode)
2044 			return got_error_set_errno(errcode,
2045 			    "pthread_cond_signal");
2046 		errcode = pthread_mutex_unlock(&tog_mutex);
2047 		if (errcode)
2048 			return got_error_set_errno(errcode,
2049 			    "pthread_mutex_unlock");
2050 		errcode = pthread_join(s->thread, (void **)&err);
2051 		if (errcode)
2052 			return got_error_set_errno(errcode, "pthread_join");
2053 		errcode = pthread_mutex_lock(&tog_mutex);
2054 		if (errcode)
2055 			return got_error_set_errno(errcode,
2056 			    "pthread_mutex_lock");
2057 		s->thread = NULL;
2058 	}
2059 
2060 	if (s->thread_args.repo) {
2061 		got_repo_close(s->thread_args.repo);
2062 		s->thread_args.repo = NULL;
2063 	}
2064 
2065 	if (s->thread_args.graph) {
2066 		got_commit_graph_close(s->thread_args.graph);
2067 		s->thread_args.graph = NULL;
2068 	}
2069 
2070 	return err;
2071 }
2072 
2073 static const struct got_error *
2074 close_log_view(struct tog_view *view)
2075 {
2076 	const struct got_error *err = NULL;
2077 	struct tog_log_view_state *s = &view->state.log;
2078 	int errcode;
2079 
2080 	err = stop_log_thread(s);
2081 
2082 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2083 	if (errcode && err == NULL)
2084 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2085 
2086 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2087 	if (errcode && err == NULL)
2088 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2089 
2090 	free_commits(&s->commits);
2091 	free(s->in_repo_path);
2092 	s->in_repo_path = NULL;
2093 	free(s->start_id);
2094 	s->start_id = NULL;
2095 	got_ref_list_free(&s->refs);
2096 	return err;
2097 }
2098 
2099 static const struct got_error *
2100 search_start_log_view(struct tog_view *view)
2101 {
2102 	struct tog_log_view_state *s = &view->state.log;
2103 
2104 	s->matched_entry = NULL;
2105 	s->search_entry = NULL;
2106 	return NULL;
2107 }
2108 
2109 static const struct got_error *
2110 search_next_log_view(struct tog_view *view)
2111 {
2112 	const struct got_error *err = NULL;
2113 	struct tog_log_view_state *s = &view->state.log;
2114 	struct commit_queue_entry *entry;
2115 
2116 	/* Display progress update in log view. */
2117 	show_log_view(view);
2118 	update_panels();
2119 	doupdate();
2120 
2121 	if (s->search_entry) {
2122 		int errcode, ch;
2123 		errcode = pthread_mutex_unlock(&tog_mutex);
2124 		if (errcode)
2125 			return got_error_set_errno(errcode,
2126 			    "pthread_mutex_unlock");
2127 		ch = wgetch(view->window);
2128 		errcode = pthread_mutex_lock(&tog_mutex);
2129 		if (errcode)
2130 			return got_error_set_errno(errcode,
2131 			    "pthread_mutex_lock");
2132 		if (ch == KEY_BACKSPACE) {
2133 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2134 			return NULL;
2135 		}
2136 		if (view->searching == TOG_SEARCH_FORWARD)
2137 			entry = TAILQ_NEXT(s->search_entry, entry);
2138 		else
2139 			entry = TAILQ_PREV(s->search_entry,
2140 			    commit_queue_head, entry);
2141 	} else if (s->matched_entry) {
2142 		if (view->searching == TOG_SEARCH_FORWARD)
2143 			entry = TAILQ_NEXT(s->matched_entry, entry);
2144 		else
2145 			entry = TAILQ_PREV(s->matched_entry,
2146 			    commit_queue_head, entry);
2147 	} else {
2148 		if (view->searching == TOG_SEARCH_FORWARD)
2149 			entry = TAILQ_FIRST(&s->commits.head);
2150 		else
2151 			entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2152 	}
2153 
2154 	while (1) {
2155 		int have_match = 0;
2156 
2157 		if (entry == NULL) {
2158 			if (s->thread_args.log_complete ||
2159 			    view->searching == TOG_SEARCH_BACKWARD) {
2160 				view->search_next_done =
2161 				    (s->matched_entry == NULL ?
2162 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2163 				s->search_entry = NULL;
2164 				return NULL;
2165 			}
2166 			/*
2167 			 * Poke the log thread for more commits and return,
2168 			 * allowing the main loop to make progress. Search
2169 			 * will resume at s->search_entry once we come back.
2170 			 */
2171 			s->thread_args.commits_needed++;
2172 			return trigger_log_thread(view, 0);
2173 		}
2174 
2175 		err = match_commit(&have_match, entry->id, entry->commit,
2176 		    &view->regex);
2177 		if (err)
2178 			break;
2179 		if (have_match) {
2180 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2181 			s->matched_entry = entry;
2182 			break;
2183 		}
2184 
2185 		s->search_entry = entry;
2186 		if (view->searching == TOG_SEARCH_FORWARD)
2187 			entry = TAILQ_NEXT(entry, entry);
2188 		else
2189 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2190 	}
2191 
2192 	if (s->matched_entry) {
2193 		int cur = s->selected_entry->idx;
2194 		while (cur < s->matched_entry->idx) {
2195 			err = input_log_view(NULL, NULL, NULL, view, KEY_DOWN);
2196 			if (err)
2197 				return err;
2198 			cur++;
2199 		}
2200 		while (cur > s->matched_entry->idx) {
2201 			err = input_log_view(NULL, NULL, NULL, view, KEY_UP);
2202 			if (err)
2203 				return err;
2204 			cur--;
2205 		}
2206 	}
2207 
2208 	s->search_entry = NULL;
2209 
2210 	return NULL;
2211 }
2212 
2213 static const struct got_error *
2214 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2215     struct got_repository *repo, const char *head_ref_name,
2216     const char *in_repo_path, int log_branches)
2217 {
2218 	const struct got_error *err = NULL;
2219 	struct tog_log_view_state *s = &view->state.log;
2220 	struct got_repository *thread_repo = NULL;
2221 	struct got_commit_graph *thread_graph = NULL;
2222 	int errcode;
2223 
2224 	SIMPLEQ_INIT(&s->refs);
2225 
2226 	if (in_repo_path != s->in_repo_path) {
2227 		free(s->in_repo_path);
2228 		s->in_repo_path = strdup(in_repo_path);
2229 		if (s->in_repo_path == NULL)
2230 			return got_error_from_errno("strdup");
2231 	}
2232 
2233 	/* The commit queue only contains commits being displayed. */
2234 	TAILQ_INIT(&s->commits.head);
2235 	s->commits.ncommits = 0;
2236 
2237 	err = got_ref_list(&s->refs, repo, NULL, got_ref_cmp_by_name, NULL);
2238 	if (err)
2239 		goto done;
2240 
2241 	s->repo = repo;
2242 	s->head_ref_name = head_ref_name;
2243 	s->start_id = got_object_id_dup(start_id);
2244 	if (s->start_id == NULL) {
2245 		err = got_error_from_errno("got_object_id_dup");
2246 		goto done;
2247 	}
2248 	s->log_branches = log_branches;
2249 
2250 	SIMPLEQ_INIT(&s->colors);
2251 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2252 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2253 		    get_color_value("TOG_COLOR_COMMIT"));
2254 		if (err)
2255 			goto done;
2256 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2257 		    get_color_value("TOG_COLOR_AUTHOR"));
2258 		if (err) {
2259 			free_colors(&s->colors);
2260 			goto done;
2261 		}
2262 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2263 		    get_color_value("TOG_COLOR_DATE"));
2264 		if (err) {
2265 			free_colors(&s->colors);
2266 			goto done;
2267 		}
2268 	}
2269 
2270 	view->show = show_log_view;
2271 	view->input = input_log_view;
2272 	view->close = close_log_view;
2273 	view->search_start = search_start_log_view;
2274 	view->search_next = search_next_log_view;
2275 
2276 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL);
2277 	if (err)
2278 		goto done;
2279 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2280 	    !s->log_branches);
2281 	if (err)
2282 		goto done;
2283 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2284 	    s->repo, NULL, NULL);
2285 	if (err)
2286 		goto done;
2287 
2288 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2289 	if (errcode) {
2290 		err = got_error_set_errno(errcode, "pthread_cond_init");
2291 		goto done;
2292 	}
2293 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2294 	if (errcode) {
2295 		err = got_error_set_errno(errcode, "pthread_cond_init");
2296 		goto done;
2297 	}
2298 
2299 	s->thread_args.commits_needed = view->nlines;
2300 	s->thread_args.graph = thread_graph;
2301 	s->thread_args.commits = &s->commits;
2302 	s->thread_args.in_repo_path = s->in_repo_path;
2303 	s->thread_args.start_id = s->start_id;
2304 	s->thread_args.repo = thread_repo;
2305 	s->thread_args.log_complete = 0;
2306 	s->thread_args.quit = &s->quit;
2307 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2308 	s->thread_args.selected_entry = &s->selected_entry;
2309 	s->thread_args.searching = &view->searching;
2310 	s->thread_args.search_next_done = &view->search_next_done;
2311 	s->thread_args.regex = &view->regex;
2312 done:
2313 	if (err)
2314 		close_log_view(view);
2315 	return err;
2316 }
2317 
2318 static const struct got_error *
2319 show_log_view(struct tog_view *view)
2320 {
2321 	const struct got_error *err;
2322 	struct tog_log_view_state *s = &view->state.log;
2323 
2324 	if (s->thread == NULL) {
2325 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2326 		    &s->thread_args);
2327 		if (errcode)
2328 			return got_error_set_errno(errcode, "pthread_create");
2329 		if (s->thread_args.commits_needed > 0) {
2330 			err = trigger_log_thread(view, 1);
2331 			if (err)
2332 				return err;
2333 		}
2334 	}
2335 
2336 	return draw_commits(view);
2337 }
2338 
2339 static const struct got_error *
2340 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
2341     struct tog_view **focus_view, struct tog_view *view, int ch)
2342 {
2343 	const struct got_error *err = NULL;
2344 	struct tog_log_view_state *s = &view->state.log;
2345 	char *parent_path, *in_repo_path = NULL;
2346 	struct tog_view *diff_view = NULL, *tree_view = NULL, *lv = NULL;
2347 	struct tog_view *ref_view = NULL;
2348 	int begin_x = 0;
2349 	struct got_object_id *start_id;
2350 
2351 	switch (ch) {
2352 	case 'q':
2353 		s->quit = 1;
2354 		break;
2355 	case 'k':
2356 	case KEY_UP:
2357 	case '<':
2358 	case ',':
2359 		if (s->first_displayed_entry == NULL)
2360 			break;
2361 		if (s->selected > 0)
2362 			s->selected--;
2363 		else
2364 			log_scroll_up(s, 1);
2365 		break;
2366 	case KEY_PPAGE:
2367 	case CTRL('b'):
2368 		if (s->first_displayed_entry == NULL)
2369 			break;
2370 		if (TAILQ_FIRST(&s->commits.head) ==
2371 		    s->first_displayed_entry) {
2372 			s->selected = 0;
2373 			break;
2374 		}
2375 		log_scroll_up(s, view->nlines - 1);
2376 		break;
2377 	case 'j':
2378 	case KEY_DOWN:
2379 	case '>':
2380 	case '.':
2381 		if (s->first_displayed_entry == NULL)
2382 			break;
2383 		if (s->selected < MIN(view->nlines - 2,
2384 		    s->commits.ncommits - 1)) {
2385 			s->selected++;
2386 			break;
2387 		}
2388 		err = log_scroll_down(view, 1);
2389 		break;
2390 	case KEY_NPAGE:
2391 	case CTRL('f'): {
2392 		struct commit_queue_entry *first;
2393 		first = s->first_displayed_entry;
2394 		if (first == NULL)
2395 			break;
2396 		err = log_scroll_down(view, view->nlines - 1);
2397 		if (err)
2398 			break;
2399 		if (first == s->first_displayed_entry &&
2400 		    s->selected < MIN(view->nlines - 2,
2401 		    s->commits.ncommits - 1)) {
2402 			/* can't scroll further down */
2403 			s->selected = MIN(view->nlines - 2,
2404 			    s->commits.ncommits - 1);
2405 		}
2406 		err = NULL;
2407 		break;
2408 	}
2409 	case KEY_RESIZE:
2410 		if (s->selected > view->nlines - 2)
2411 			s->selected = view->nlines - 2;
2412 		if (s->selected > s->commits.ncommits - 1)
2413 			s->selected = s->commits.ncommits - 1;
2414 		if (s->commits.ncommits < view->nlines - 1 &&
2415 		    !s->thread_args.log_complete) {
2416 			s->thread_args.commits_needed += (view->nlines - 1) -
2417 			    s->commits.ncommits;
2418 			err = trigger_log_thread(view, 1);
2419 		}
2420 		break;
2421 	case KEY_ENTER:
2422 	case ' ':
2423 	case '\r':
2424 		if (s->selected_entry == NULL)
2425 			break;
2426 		if (view_is_parent_view(view))
2427 			begin_x = view_split_begin_x(view->begin_x);
2428 		err = open_diff_view_for_commit(&diff_view, begin_x,
2429 		    s->selected_entry->commit, s->selected_entry->id,
2430 		    view, s->repo);
2431 		if (err)
2432 			break;
2433 		if (view_is_parent_view(view)) {
2434 			err = view_close_child(view);
2435 			if (err)
2436 				return err;
2437 			err = view_set_child(view, diff_view);
2438 			if (err) {
2439 				view_close(diff_view);
2440 				break;
2441 			}
2442 			*focus_view = diff_view;
2443 			view->child_focussed = 1;
2444 		} else
2445 			*new_view = diff_view;
2446 		break;
2447 	case 't':
2448 		if (s->selected_entry == NULL)
2449 			break;
2450 		if (view_is_parent_view(view))
2451 			begin_x = view_split_begin_x(view->begin_x);
2452 		err = browse_commit_tree(&tree_view, begin_x,
2453 		    s->selected_entry, s->in_repo_path, s->repo);
2454 		if (err)
2455 			break;
2456 		if (view_is_parent_view(view)) {
2457 			err = view_close_child(view);
2458 			if (err)
2459 				return err;
2460 			err = view_set_child(view, tree_view);
2461 			if (err) {
2462 				view_close(tree_view);
2463 				break;
2464 			}
2465 			*focus_view = tree_view;
2466 			view->child_focussed = 1;
2467 		} else
2468 			*new_view = tree_view;
2469 		break;
2470 	case KEY_BACKSPACE:
2471 		if (got_path_cmp(s->in_repo_path, "/",
2472 		    strlen(s->in_repo_path), 1) == 0)
2473 			break;
2474 		err = got_path_dirname(&parent_path, s->in_repo_path);
2475 		if (err)
2476 			return err;
2477 		err = stop_log_thread(s);
2478 		if (err) {
2479 			free(parent_path);
2480 			return err;
2481 		}
2482 		lv = view_open(view->nlines, view->ncols,
2483 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2484 		if (lv == NULL) {
2485 			free(parent_path);
2486 			return got_error_from_errno("view_open");
2487 		}
2488 		err = open_log_view(lv, s->start_id, s->repo, s->head_ref_name,
2489 		    parent_path, s->log_branches);
2490 		free(parent_path);
2491 		if (err)
2492 			return err;;
2493 		if (view_is_parent_view(view))
2494 			*new_view = lv;
2495 		else {
2496 			view_set_child(view->parent, lv);
2497 			*focus_view = lv;
2498 		}
2499 		break;
2500 	case CTRL('l'):
2501 		err = stop_log_thread(s);
2502 		if (err)
2503 			return err;
2504 		lv = view_open(view->nlines, view->ncols,
2505 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2506 		if (lv == NULL)
2507 			return got_error_from_errno("view_open");
2508 		err = got_repo_match_object_id(&start_id, NULL,
2509 		    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2510 		    GOT_OBJ_TYPE_COMMIT, 1, s->repo);
2511 		if (err) {
2512 			view_close(lv);
2513 			return err;
2514 		}
2515 		in_repo_path = strdup(s->in_repo_path);
2516 		if (in_repo_path == NULL) {
2517 			free(start_id);
2518 			view_close(lv);
2519 			return got_error_from_errno("strdup");
2520 		}
2521 		err = open_log_view(lv, start_id, s->repo, s->head_ref_name,
2522 		    in_repo_path, s->log_branches);
2523 		if (err) {
2524 			free(start_id);
2525 			view_close(lv);
2526 			return err;;
2527 		}
2528 		*dead_view = view;
2529 		*new_view = lv;
2530 		break;
2531 	case 'B':
2532 		s->log_branches = !s->log_branches;
2533 		err = stop_log_thread(s);
2534 		if (err)
2535 			return err;
2536 		lv = view_open(view->nlines, view->ncols,
2537 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2538 		if (lv == NULL)
2539 			return got_error_from_errno("view_open");
2540 		err = open_log_view(lv, s->start_id, s->repo,
2541 		    s->head_ref_name, s->in_repo_path, s->log_branches);
2542 		if (err) {
2543 			view_close(lv);
2544 			return err;;
2545 		}
2546 		*dead_view = view;
2547 		*new_view = lv;
2548 		break;
2549 	case 'r':
2550 		if (view_is_parent_view(view))
2551 			begin_x = view_split_begin_x(view->begin_x);
2552 		ref_view = view_open(view->nlines, view->ncols,
2553 		    view->begin_y, begin_x, TOG_VIEW_REF);
2554 		if (ref_view == NULL)
2555 			return got_error_from_errno("view_open");
2556 		err = open_ref_view(ref_view, s->repo);
2557 		if (err) {
2558 			view_close(ref_view);
2559 			return err;
2560 		}
2561 		if (view_is_parent_view(view)) {
2562 			err = view_close_child(view);
2563 			if (err)
2564 				return err;
2565 			err = view_set_child(view, ref_view);
2566 			if (err) {
2567 				view_close(ref_view);
2568 				break;
2569 			}
2570 			*focus_view = ref_view;
2571 			view->child_focussed = 1;
2572 		} else
2573 			*new_view = ref_view;
2574 		break;
2575 	default:
2576 		break;
2577 	}
2578 
2579 	return err;
2580 }
2581 
2582 static const struct got_error *
2583 apply_unveil(const char *repo_path, const char *worktree_path)
2584 {
2585 	const struct got_error *error;
2586 
2587 #ifdef PROFILE
2588 	if (unveil("gmon.out", "rwc") != 0)
2589 		return got_error_from_errno2("unveil", "gmon.out");
2590 #endif
2591 	if (repo_path && unveil(repo_path, "r") != 0)
2592 		return got_error_from_errno2("unveil", repo_path);
2593 
2594 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2595 		return got_error_from_errno2("unveil", worktree_path);
2596 
2597 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2598 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2599 
2600 	error = got_privsep_unveil_exec_helpers();
2601 	if (error != NULL)
2602 		return error;
2603 
2604 	if (unveil(NULL, NULL) != 0)
2605 		return got_error_from_errno("unveil");
2606 
2607 	return NULL;
2608 }
2609 
2610 static void
2611 init_curses(void)
2612 {
2613 	initscr();
2614 	cbreak();
2615 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2616 	noecho();
2617 	nonl();
2618 	intrflush(stdscr, FALSE);
2619 	keypad(stdscr, TRUE);
2620 	curs_set(0);
2621 	if (getenv("TOG_COLORS") != NULL) {
2622 		start_color();
2623 		use_default_colors();
2624 	}
2625 	signal(SIGWINCH, tog_sigwinch);
2626 	signal(SIGPIPE, tog_sigpipe);
2627 	signal(SIGCONT, tog_sigcont);
2628 }
2629 
2630 static const struct got_error *
2631 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2632     struct got_repository *repo, struct got_worktree *worktree)
2633 {
2634 	const struct got_error *err = NULL;
2635 
2636 	if (argc == 0) {
2637 		*in_repo_path = strdup("/");
2638 		if (*in_repo_path == NULL)
2639 			return got_error_from_errno("strdup");
2640 		return NULL;
2641 	}
2642 
2643 	if (worktree) {
2644 		const char *prefix = got_worktree_get_path_prefix(worktree);
2645 		char *p;
2646 
2647 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2648 		if (err)
2649 			return err;
2650 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2651 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2652 		    p) == -1) {
2653 			err = got_error_from_errno("asprintf");
2654 			*in_repo_path = NULL;
2655 		}
2656 		free(p);
2657 	} else
2658 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2659 
2660 	return err;
2661 }
2662 
2663 static const struct got_error *
2664 cmd_log(int argc, char *argv[])
2665 {
2666 	const struct got_error *error;
2667 	struct got_repository *repo = NULL;
2668 	struct got_worktree *worktree = NULL;
2669 	struct got_object_id *start_id = NULL;
2670 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2671 	char *start_commit = NULL, *head_ref_name = NULL;
2672 	int ch, log_branches = 0;
2673 	struct tog_view *view;
2674 
2675 #ifndef PROFILE
2676 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2677 	    NULL) == -1)
2678 		err(1, "pledge");
2679 #endif
2680 
2681 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2682 		switch (ch) {
2683 		case 'b':
2684 			log_branches = 1;
2685 			break;
2686 		case 'c':
2687 			start_commit = optarg;
2688 			break;
2689 		case 'r':
2690 			repo_path = realpath(optarg, NULL);
2691 			if (repo_path == NULL)
2692 				return got_error_from_errno2("realpath",
2693 				    optarg);
2694 			break;
2695 		default:
2696 			usage_log();
2697 			/* NOTREACHED */
2698 		}
2699 	}
2700 
2701 	argc -= optind;
2702 	argv += optind;
2703 
2704 	if (argc > 1)
2705 		usage_log();
2706 
2707 	cwd = getcwd(NULL, 0);
2708 	if (cwd == NULL)
2709 		return got_error_from_errno("getcwd");
2710 
2711 	error = got_worktree_open(&worktree, cwd);
2712 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
2713 		goto done;
2714 
2715 	if (repo_path == NULL) {
2716 		if (worktree)
2717 			repo_path =
2718 			    strdup(got_worktree_get_repo_path(worktree));
2719 		else
2720 			repo_path = strdup(cwd);
2721 	}
2722 	if (repo_path == NULL) {
2723 		error = got_error_from_errno("strdup");
2724 		goto done;
2725 	}
2726 
2727 	error = got_repo_open(&repo, repo_path, NULL);
2728 	if (error != NULL)
2729 		goto done;
2730 
2731 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
2732 	    repo, worktree);
2733 	if (error)
2734 		goto done;
2735 
2736 	init_curses();
2737 
2738 	error = apply_unveil(got_repo_get_path(repo),
2739 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2740 	if (error)
2741 		goto done;
2742 
2743 	if (start_commit == NULL)
2744 		error = got_repo_match_object_id(&start_id, NULL, worktree ?
2745 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
2746 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2747 	else
2748 		error = got_repo_match_object_id(&start_id, NULL, start_commit,
2749 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2750 	if (error != NULL)
2751 		goto done;
2752 
2753 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2754 	if (view == NULL) {
2755 		error = got_error_from_errno("view_open");
2756 		goto done;
2757 	}
2758 	if (worktree) {
2759 		head_ref_name = strdup(
2760 		    got_worktree_get_head_ref_name(worktree));
2761 		if (head_ref_name == NULL) {
2762 			error = got_error_from_errno("strdup");
2763 			goto done;
2764 		}
2765 	}
2766 	error = open_log_view(view, start_id, repo, head_ref_name,
2767 	    in_repo_path, log_branches);
2768 	if (error)
2769 		goto done;
2770 	if (worktree) {
2771 		/* Release work tree lock. */
2772 		got_worktree_close(worktree);
2773 		worktree = NULL;
2774 	}
2775 	error = view_loop(view);
2776 done:
2777 	free(in_repo_path);
2778 	free(repo_path);
2779 	free(cwd);
2780 	free(start_id);
2781 	free(head_ref_name);
2782 	if (repo)
2783 		got_repo_close(repo);
2784 	if (worktree)
2785 		got_worktree_close(worktree);
2786 	return error;
2787 }
2788 
2789 __dead static void
2790 usage_diff(void)
2791 {
2792 	endwin();
2793 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
2794 	    "[-w] object1 object2\n", getprogname());
2795 	exit(1);
2796 }
2797 
2798 static char *
2799 parse_next_line(FILE *f, size_t *len)
2800 {
2801 	char *line;
2802 	size_t linelen;
2803 	size_t lineno;
2804 	const char delim[3] = { '\0', '\0', '\0'};
2805 
2806 	line = fparseln(f, &linelen, &lineno, delim, 0);
2807 	if (len)
2808 		*len = linelen;
2809 	return line;
2810 }
2811 
2812 static int
2813 match_line(const char *line, regex_t *regex, size_t nmatch,
2814     regmatch_t *regmatch)
2815 {
2816 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
2817 }
2818 
2819 struct tog_color *
2820 match_color(struct tog_colors *colors, const char *line)
2821 {
2822 	struct tog_color *tc = NULL;
2823 
2824 	SIMPLEQ_FOREACH(tc, colors, entry) {
2825 		if (match_line(line, &tc->regex, 0, NULL))
2826 			return tc;
2827 	}
2828 
2829 	return NULL;
2830 }
2831 
2832 static const struct got_error *
2833 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
2834     WINDOW *window, regmatch_t *regmatch)
2835 {
2836 	const struct got_error *err = NULL;
2837 	wchar_t *wline;
2838 	int width;
2839 	char *s;
2840 
2841 	*wtotal = 0;
2842 
2843 	s = strndup(line, regmatch->rm_so);
2844 	if (s == NULL)
2845 		return got_error_from_errno("strndup");
2846 
2847 	err = format_line(&wline, &width, s, wlimit, col_tab_align);
2848 	if (err) {
2849 		free(s);
2850 		return err;
2851 	}
2852 	waddwstr(window, wline);
2853 	free(wline);
2854 	free(s);
2855 	wlimit -= width;
2856 	*wtotal += width;
2857 
2858 	if (wlimit > 0) {
2859 		s = strndup(line + regmatch->rm_so,
2860 		    regmatch->rm_eo - regmatch->rm_so);
2861 		if (s == NULL) {
2862 			err = got_error_from_errno("strndup");
2863 			free(s);
2864 			return err;
2865 		}
2866 		err = format_line(&wline, &width, s, wlimit, col_tab_align);
2867 		if (err) {
2868 			free(s);
2869 			return err;
2870 		}
2871 		wattr_on(window, A_STANDOUT, NULL);
2872 		waddwstr(window, wline);
2873 		wattr_off(window, A_STANDOUT, NULL);
2874 		free(wline);
2875 		free(s);
2876 		wlimit -= width;
2877 		*wtotal += width;
2878 	}
2879 
2880 	if (wlimit > 0 && strlen(line) > regmatch->rm_eo) {
2881 		err = format_line(&wline, &width,
2882 		     line + regmatch->rm_eo, wlimit, col_tab_align);
2883 		if (err)
2884 			return err;
2885 		waddwstr(window, wline);
2886 		free(wline);
2887 		*wtotal += width;
2888 	}
2889 
2890 	return NULL;
2891 }
2892 
2893 static const struct got_error *
2894 draw_file(struct tog_view *view, const char *header)
2895 {
2896 	struct tog_diff_view_state *s = &view->state.diff;
2897 	regmatch_t *regmatch = &view->regmatch;
2898 	const struct got_error *err;
2899 	int nprinted = 0;
2900 	char *line;
2901 	struct tog_color *tc;
2902 	size_t len;
2903 	wchar_t *wline;
2904 	int width;
2905 	int max_lines = view->nlines;
2906 	int nlines = s->nlines;
2907 	off_t line_offset;
2908 
2909 	line_offset = s->line_offsets[s->first_displayed_line - 1];
2910 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
2911 		return got_error_from_errno("fseek");
2912 
2913 	werase(view->window);
2914 
2915 	if (header) {
2916 		if (asprintf(&line, "[%d/%d] %s",
2917 		    s->first_displayed_line - 1 + s->selected_line, nlines,
2918 		    header) == -1)
2919 			return got_error_from_errno("asprintf");
2920 		err = format_line(&wline, &width, line, view->ncols, 0);
2921 		free(line);
2922 		if (err)
2923 			return err;
2924 
2925 		if (view_needs_focus_indication(view))
2926 			wstandout(view->window);
2927 		waddwstr(view->window, wline);
2928 		free(wline);
2929 		wline = NULL;
2930 		if (view_needs_focus_indication(view))
2931 			wstandend(view->window);
2932 		if (width <= view->ncols - 1)
2933 			waddch(view->window, '\n');
2934 
2935 		if (max_lines <= 1)
2936 			return NULL;
2937 		max_lines--;
2938 	}
2939 
2940 	s->eof = 0;
2941 	while (max_lines > 0 && nprinted < max_lines) {
2942 		line = parse_next_line(s->f, &len);
2943 		if (line == NULL) {
2944 			s->eof = 1;
2945 			break;
2946 		}
2947 
2948 		tc = match_color(&s->colors, line);
2949 		if (tc)
2950 			wattr_on(view->window,
2951 			    COLOR_PAIR(tc->colorpair), NULL);
2952 		if (s->first_displayed_line + nprinted == s->matched_line &&
2953 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
2954 			err = add_matched_line(&width, line, view->ncols, 0,
2955 			    view->window, regmatch);
2956 			if (err) {
2957 				free(line);
2958 				return err;
2959 			}
2960 		} else {
2961 			err = format_line(&wline, &width, line, view->ncols, 0);
2962 			if (err) {
2963 				free(line);
2964 				return err;
2965 			}
2966 			waddwstr(view->window, wline);
2967 			free(wline);
2968 			wline = NULL;
2969 		}
2970 		if (tc)
2971 			wattr_off(view->window,
2972 			    COLOR_PAIR(tc->colorpair), NULL);
2973 		if (width <= view->ncols - 1)
2974 			waddch(view->window, '\n');
2975 		nprinted++;
2976 		free(line);
2977 	}
2978 	if (nprinted >= 1)
2979 		s->last_displayed_line = s->first_displayed_line +
2980 		    (nprinted - 1);
2981 	else
2982 		s->last_displayed_line = s->first_displayed_line;
2983 
2984 	view_vborder(view);
2985 
2986 	if (s->eof) {
2987 		while (nprinted < view->nlines) {
2988 			waddch(view->window, '\n');
2989 			nprinted++;
2990 		}
2991 
2992 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols, 0);
2993 		if (err) {
2994 			return err;
2995 		}
2996 
2997 		wstandout(view->window);
2998 		waddwstr(view->window, wline);
2999 		free(wline);
3000 		wline = NULL;
3001 		wstandend(view->window);
3002 	}
3003 
3004 	return NULL;
3005 }
3006 
3007 static char *
3008 get_datestr(time_t *time, char *datebuf)
3009 {
3010 	struct tm mytm, *tm;
3011 	char *p, *s;
3012 
3013 	tm = gmtime_r(time, &mytm);
3014 	if (tm == NULL)
3015 		return NULL;
3016 	s = asctime_r(tm, datebuf);
3017 	if (s == NULL)
3018 		return NULL;
3019 	p = strchr(s, '\n');
3020 	if (p)
3021 		*p = '\0';
3022 	return s;
3023 }
3024 
3025 static const struct got_error *
3026 get_changed_paths(struct got_pathlist_head *paths,
3027     struct got_commit_object *commit, struct got_repository *repo)
3028 {
3029 	const struct got_error *err = NULL;
3030 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3031 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3032 	struct got_object_qid *qid;
3033 
3034 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
3035 	if (qid != NULL) {
3036 		struct got_commit_object *pcommit;
3037 		err = got_object_open_as_commit(&pcommit, repo,
3038 		    qid->id);
3039 		if (err)
3040 			return err;
3041 
3042 		tree_id1 = got_object_commit_get_tree_id(pcommit);
3043 		got_object_commit_close(pcommit);
3044 
3045 	}
3046 
3047 	if (tree_id1) {
3048 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3049 		if (err)
3050 			goto done;
3051 	}
3052 
3053 	tree_id2 = got_object_commit_get_tree_id(commit);
3054 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3055 	if (err)
3056 		goto done;
3057 
3058 	err = got_diff_tree(tree1, tree2, "", "", repo,
3059 	    got_diff_tree_collect_changed_paths, paths, 0);
3060 done:
3061 	if (tree1)
3062 		got_object_tree_close(tree1);
3063 	if (tree2)
3064 		got_object_tree_close(tree2);
3065 	return err;
3066 }
3067 
3068 static const struct got_error *
3069 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3070 {
3071 	off_t *p;
3072 
3073 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3074 	if (p == NULL)
3075 		return got_error_from_errno("reallocarray");
3076 	*line_offsets = p;
3077 	(*line_offsets)[*nlines] = off;
3078 	(*nlines)++;
3079 	return NULL;
3080 }
3081 
3082 static const struct got_error *
3083 write_commit_info(off_t **line_offsets, size_t *nlines,
3084     struct got_object_id *commit_id, struct got_reflist_head *refs,
3085     struct got_repository *repo, FILE *outfile)
3086 {
3087 	const struct got_error *err = NULL;
3088 	char datebuf[26], *datestr;
3089 	struct got_commit_object *commit;
3090 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3091 	time_t committer_time;
3092 	const char *author, *committer;
3093 	char *refs_str = NULL;
3094 	struct got_pathlist_head changed_paths;
3095 	struct got_pathlist_entry *pe;
3096 	off_t outoff = 0;
3097 	int n;
3098 
3099 	TAILQ_INIT(&changed_paths);
3100 
3101 	if (refs) {
3102 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3103 		if (err)
3104 			return err;
3105 	}
3106 
3107 	err = got_object_open_as_commit(&commit, repo, commit_id);
3108 	if (err)
3109 		return err;
3110 
3111 	err = got_object_id_str(&id_str, commit_id);
3112 	if (err) {
3113 		err = got_error_from_errno("got_object_id_str");
3114 		goto done;
3115 	}
3116 
3117 	err = add_line_offset(line_offsets, nlines, 0);
3118 	if (err)
3119 		goto done;
3120 
3121 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3122 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3123 	if (n < 0) {
3124 		err = got_error_from_errno("fprintf");
3125 		goto done;
3126 	}
3127 	outoff += n;
3128 	err = add_line_offset(line_offsets, nlines, outoff);
3129 	if (err)
3130 		goto done;
3131 
3132 	n = fprintf(outfile, "from: %s\n",
3133 	    got_object_commit_get_author(commit));
3134 	if (n < 0) {
3135 		err = got_error_from_errno("fprintf");
3136 		goto done;
3137 	}
3138 	outoff += n;
3139 	err = add_line_offset(line_offsets, nlines, outoff);
3140 	if (err)
3141 		goto done;
3142 
3143 	committer_time = got_object_commit_get_committer_time(commit);
3144 	datestr = get_datestr(&committer_time, datebuf);
3145 	if (datestr) {
3146 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3147 		if (n < 0) {
3148 			err = got_error_from_errno("fprintf");
3149 			goto done;
3150 		}
3151 		outoff += n;
3152 		err = add_line_offset(line_offsets, nlines, outoff);
3153 		if (err)
3154 			goto done;
3155 	}
3156 	author = got_object_commit_get_author(commit);
3157 	committer = got_object_commit_get_committer(commit);
3158 	if (strcmp(author, committer) != 0) {
3159 		n = fprintf(outfile, "via: %s\n", committer);
3160 		if (n < 0) {
3161 			err = got_error_from_errno("fprintf");
3162 			goto done;
3163 		}
3164 		outoff += n;
3165 		err = add_line_offset(line_offsets, nlines, outoff);
3166 		if (err)
3167 			goto done;
3168 	}
3169 	err = got_object_commit_get_logmsg(&logmsg, commit);
3170 	if (err)
3171 		goto done;
3172 	s = logmsg;
3173 	while ((line = strsep(&s, "\n")) != NULL) {
3174 		n = fprintf(outfile, "%s\n", line);
3175 		if (n < 0) {
3176 			err = got_error_from_errno("fprintf");
3177 			goto done;
3178 		}
3179 		outoff += n;
3180 		err = add_line_offset(line_offsets, nlines, outoff);
3181 		if (err)
3182 			goto done;
3183 	}
3184 
3185 	err = get_changed_paths(&changed_paths, commit, repo);
3186 	if (err)
3187 		goto done;
3188 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3189 		struct got_diff_changed_path *cp = pe->data;
3190 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3191 		if (n < 0) {
3192 			err = got_error_from_errno("fprintf");
3193 			goto done;
3194 		}
3195 		outoff += n;
3196 		err = add_line_offset(line_offsets, nlines, outoff);
3197 		if (err)
3198 			goto done;
3199 		free((char *)pe->path);
3200 		free(pe->data);
3201 	}
3202 
3203 	fputc('\n', outfile);
3204 	outoff++;
3205 	err = add_line_offset(line_offsets, nlines, outoff);
3206 done:
3207 	got_pathlist_free(&changed_paths);
3208 	free(id_str);
3209 	free(logmsg);
3210 	free(refs_str);
3211 	got_object_commit_close(commit);
3212 	if (err) {
3213 		free(*line_offsets);
3214 		*line_offsets = NULL;
3215 		*nlines = 0;
3216 	}
3217 	return err;
3218 }
3219 
3220 static const struct got_error *
3221 create_diff(struct tog_diff_view_state *s)
3222 {
3223 	const struct got_error *err = NULL;
3224 	FILE *f = NULL;
3225 	int obj_type;
3226 
3227 	free(s->line_offsets);
3228 	s->line_offsets = malloc(sizeof(off_t));
3229 	if (s->line_offsets == NULL)
3230 		return got_error_from_errno("malloc");
3231 	s->nlines = 0;
3232 
3233 	f = got_opentemp();
3234 	if (f == NULL) {
3235 		err = got_error_from_errno("got_opentemp");
3236 		goto done;
3237 	}
3238 	if (s->f && fclose(s->f) != 0) {
3239 		err = got_error_from_errno("fclose");
3240 		goto done;
3241 	}
3242 	s->f = f;
3243 
3244 	if (s->id1)
3245 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3246 	else
3247 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3248 	if (err)
3249 		goto done;
3250 
3251 	switch (obj_type) {
3252 	case GOT_OBJ_TYPE_BLOB:
3253 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3254 		    s->id1, s->id2, s->label1, s->label2, s->diff_context,
3255 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3256 		break;
3257 	case GOT_OBJ_TYPE_TREE:
3258 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3259 		    s->id1, s->id2, "", "", s->diff_context,
3260 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3261 		break;
3262 	case GOT_OBJ_TYPE_COMMIT: {
3263 		const struct got_object_id_queue *parent_ids;
3264 		struct got_object_qid *pid;
3265 		struct got_commit_object *commit2;
3266 
3267 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3268 		if (err)
3269 			goto done;
3270 		/* Show commit info if we're diffing to a parent/root commit. */
3271 		if (s->id1 == NULL) {
3272 			err = write_commit_info(&s->line_offsets, &s->nlines,
3273 			    s->id2, &s->refs, s->repo, s->f);
3274 			if (err)
3275 				goto done;
3276 		} else {
3277 			parent_ids = got_object_commit_get_parent_ids(commit2);
3278 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
3279 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
3280 					err = write_commit_info(
3281 					    &s->line_offsets, &s->nlines,
3282 					    s->id2, &s->refs, s->repo, s->f);
3283 					if (err)
3284 						goto done;
3285 					break;
3286 				}
3287 			}
3288 		}
3289 		got_object_commit_close(commit2);
3290 
3291 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3292 		    s->id1, s->id2, s->diff_context, s->ignore_whitespace,
3293 		    s->force_text_diff, s->repo, s->f);
3294 		break;
3295 	}
3296 	default:
3297 		err = got_error(GOT_ERR_OBJ_TYPE);
3298 		break;
3299 	}
3300 	if (err)
3301 		goto done;
3302 done:
3303 	if (s->f && fflush(s->f) != 0 && err == NULL)
3304 		err = got_error_from_errno("fflush");
3305 	return err;
3306 }
3307 
3308 static void
3309 diff_view_indicate_progress(struct tog_view *view)
3310 {
3311 	mvwaddstr(view->window, 0, 0, "diffing...");
3312 	update_panels();
3313 	doupdate();
3314 }
3315 
3316 static const struct got_error *
3317 search_start_diff_view(struct tog_view *view)
3318 {
3319 	struct tog_diff_view_state *s = &view->state.diff;
3320 
3321 	s->matched_line = 0;
3322 	return NULL;
3323 }
3324 
3325 static const struct got_error *
3326 search_next_diff_view(struct tog_view *view)
3327 {
3328 	struct tog_diff_view_state *s = &view->state.diff;
3329 	int lineno;
3330 
3331 	if (!view->searching) {
3332 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3333 		return NULL;
3334 	}
3335 
3336 	if (s->matched_line) {
3337 		if (view->searching == TOG_SEARCH_FORWARD)
3338 			lineno = s->matched_line + 1;
3339 		else
3340 			lineno = s->matched_line - 1;
3341 	} else {
3342 		if (view->searching == TOG_SEARCH_FORWARD)
3343 			lineno = 1;
3344 		else
3345 			lineno = s->nlines;
3346 	}
3347 
3348 	while (1) {
3349 		char *line = NULL;
3350 		off_t offset;
3351 		size_t len;
3352 
3353 		if (lineno <= 0 || lineno > s->nlines) {
3354 			if (s->matched_line == 0) {
3355 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3356 				free(line);
3357 				break;
3358 			}
3359 
3360 			if (view->searching == TOG_SEARCH_FORWARD)
3361 				lineno = 1;
3362 			else
3363 				lineno = s->nlines;
3364 		}
3365 
3366 		offset = s->line_offsets[lineno - 1];
3367 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3368 			free(line);
3369 			return got_error_from_errno("fseeko");
3370 		}
3371 		free(line);
3372 		line = parse_next_line(s->f, &len);
3373 		if (line &&
3374 		    match_line(line, &view->regex, 1, &view->regmatch)) {
3375 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3376 			s->matched_line = lineno;
3377 			free(line);
3378 			break;
3379 		}
3380 		free(line);
3381 		if (view->searching == TOG_SEARCH_FORWARD)
3382 			lineno++;
3383 		else
3384 			lineno--;
3385 	}
3386 
3387 	if (s->matched_line) {
3388 		s->first_displayed_line = s->matched_line;
3389 		s->selected_line = 1;
3390 	}
3391 
3392 	return NULL;
3393 }
3394 
3395 static const struct got_error *
3396 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3397     struct got_object_id *id2, const char *label1, const char *label2,
3398     int diff_context, int ignore_whitespace, int force_text_diff,
3399     struct tog_view *log_view, struct got_repository *repo)
3400 {
3401 	const struct got_error *err;
3402 	struct tog_diff_view_state *s = &view->state.diff;
3403 
3404 	SIMPLEQ_INIT(&s->refs);
3405 
3406 	if (id1 != NULL && id2 != NULL) {
3407 	    int type1, type2;
3408 	    err = got_object_get_type(&type1, repo, id1);
3409 	    if (err)
3410 		return err;
3411 	    err = got_object_get_type(&type2, repo, id2);
3412 	    if (err)
3413 		return err;
3414 
3415 	    if (type1 != type2)
3416 		return got_error(GOT_ERR_OBJ_TYPE);
3417 	}
3418 	s->first_displayed_line = 1;
3419 	s->last_displayed_line = view->nlines;
3420 	s->selected_line = 1;
3421 	s->repo = repo;
3422 	s->id1 = id1;
3423 	s->id2 = id2;
3424 	s->label1 = label1;
3425 	s->label2 = label2;
3426 
3427 	if (id1) {
3428 		s->id1 = got_object_id_dup(id1);
3429 		if (s->id1 == NULL)
3430 			return got_error_from_errno("got_object_id_dup");
3431 	} else
3432 		s->id1 = NULL;
3433 
3434 	s->id2 = got_object_id_dup(id2);
3435 	if (s->id2 == NULL) {
3436 		free(s->id1);
3437 		s->id1 = NULL;
3438 		return got_error_from_errno("got_object_id_dup");
3439 	}
3440 	s->f = NULL;
3441 	s->first_displayed_line = 1;
3442 	s->last_displayed_line = view->nlines;
3443 	s->diff_context = diff_context;
3444 	s->ignore_whitespace = ignore_whitespace;
3445 	s->force_text_diff = force_text_diff;
3446 	s->log_view = log_view;
3447 	s->repo = repo;
3448 
3449 	SIMPLEQ_INIT(&s->colors);
3450 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3451 		err = add_color(&s->colors,
3452 		    "^-", TOG_COLOR_DIFF_MINUS,
3453 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3454 		if (err)
3455 			return err;
3456 		err = add_color(&s->colors, "^\\+",
3457 		    TOG_COLOR_DIFF_PLUS,
3458 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3459 		if (err) {
3460 			free_colors(&s->colors);
3461 			return err;
3462 		}
3463 		err = add_color(&s->colors,
3464 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3465 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3466 		if (err) {
3467 			free_colors(&s->colors);
3468 			return err;
3469 		}
3470 
3471 		err = add_color(&s->colors,
3472 		    "^(commit [0-9a-f]|(blob|file) [-+] |[MDmA]  [^ ])",
3473 		    TOG_COLOR_DIFF_META,
3474 		    get_color_value("TOG_COLOR_DIFF_META"));
3475 		if (err) {
3476 			free_colors(&s->colors);
3477 			return err;
3478 		}
3479 
3480 		err = add_color(&s->colors,
3481 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3482 		    get_color_value("TOG_COLOR_AUTHOR"));
3483 		if (err) {
3484 			free_colors(&s->colors);
3485 			return err;
3486 		}
3487 
3488 		err = add_color(&s->colors,
3489 		    "^date: ", TOG_COLOR_DATE,
3490 		    get_color_value("TOG_COLOR_DATE"));
3491 		if (err) {
3492 			free_colors(&s->colors);
3493 			return err;
3494 		}
3495 	}
3496 
3497 	err = got_ref_list(&s->refs, repo, NULL, got_ref_cmp_by_name, NULL);
3498 	if (err) {
3499 		free(s->id1);
3500 		s->id1 = NULL;
3501 		free(s->id2);
3502 		s->id2 = NULL;
3503 		free_colors(&s->colors);
3504 		return err;
3505 	}
3506 
3507 	if (log_view && view_is_splitscreen(view))
3508 		show_log_view(log_view); /* draw vborder */
3509 	diff_view_indicate_progress(view);
3510 
3511 	s->line_offsets = NULL;
3512 	s->nlines = 0;
3513 	err = create_diff(s);
3514 	if (err) {
3515 		free(s->id1);
3516 		s->id1 = NULL;
3517 		free(s->id2);
3518 		s->id2 = NULL;
3519 		free_colors(&s->colors);
3520 		got_ref_list_free(&s->refs);
3521 		return err;
3522 	}
3523 
3524 	view->show = show_diff_view;
3525 	view->input = input_diff_view;
3526 	view->close = close_diff_view;
3527 	view->search_start = search_start_diff_view;
3528 	view->search_next = search_next_diff_view;
3529 
3530 	return NULL;
3531 }
3532 
3533 static const struct got_error *
3534 close_diff_view(struct tog_view *view)
3535 {
3536 	const struct got_error *err = NULL;
3537 	struct tog_diff_view_state *s = &view->state.diff;
3538 
3539 	free(s->id1);
3540 	s->id1 = NULL;
3541 	free(s->id2);
3542 	s->id2 = NULL;
3543 	if (s->f && fclose(s->f) == EOF)
3544 		err = got_error_from_errno("fclose");
3545 	free_colors(&s->colors);
3546 	free(s->line_offsets);
3547 	s->line_offsets = NULL;
3548 	s->nlines = 0;
3549 	got_ref_list_free(&s->refs);
3550 	return err;
3551 }
3552 
3553 static const struct got_error *
3554 show_diff_view(struct tog_view *view)
3555 {
3556 	const struct got_error *err;
3557 	struct tog_diff_view_state *s = &view->state.diff;
3558 	char *id_str1 = NULL, *id_str2, *header;
3559 	const char *label1, *label2;
3560 
3561 	if (s->id1) {
3562 		err = got_object_id_str(&id_str1, s->id1);
3563 		if (err)
3564 			return err;
3565 		label1 = s->label1 ? : id_str1;
3566 	} else
3567 		label1 = "/dev/null";
3568 
3569 	err = got_object_id_str(&id_str2, s->id2);
3570 	if (err)
3571 		return err;
3572 	label2 = s->label2 ? : id_str2;
3573 
3574 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3575 		err = got_error_from_errno("asprintf");
3576 		free(id_str1);
3577 		free(id_str2);
3578 		return err;
3579 	}
3580 	free(id_str1);
3581 	free(id_str2);
3582 
3583 	return draw_file(view, header);
3584 }
3585 
3586 static const struct got_error *
3587 set_selected_commit(struct tog_diff_view_state *s,
3588     struct commit_queue_entry *entry)
3589 {
3590 	const struct got_error *err;
3591 	const struct got_object_id_queue *parent_ids;
3592 	struct got_commit_object *selected_commit;
3593 	struct got_object_qid *pid;
3594 
3595 	free(s->id2);
3596 	s->id2 = got_object_id_dup(entry->id);
3597 	if (s->id2 == NULL)
3598 		return got_error_from_errno("got_object_id_dup");
3599 
3600 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3601 	if (err)
3602 		return err;
3603 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3604 	free(s->id1);
3605 	pid = SIMPLEQ_FIRST(parent_ids);
3606 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
3607 	got_object_commit_close(selected_commit);
3608 	return NULL;
3609 }
3610 
3611 static const struct got_error *
3612 input_diff_view(struct tog_view **new_view, struct tog_view **dead_view,
3613     struct tog_view **focus_view, struct tog_view *view, int ch)
3614 {
3615 	const struct got_error *err = NULL;
3616 	struct tog_diff_view_state *s = &view->state.diff;
3617 	struct tog_log_view_state *ls;
3618 	struct commit_queue_entry *entry;
3619 	int i;
3620 
3621 	switch (ch) {
3622 	case 'a':
3623 	case 'w':
3624 		if (ch == 'a')
3625 			s->force_text_diff = !s->force_text_diff;
3626 		if (ch == 'w')
3627 			s->ignore_whitespace = !s->ignore_whitespace;
3628 		wclear(view->window);
3629 		s->first_displayed_line = 1;
3630 		s->last_displayed_line = view->nlines;
3631 		diff_view_indicate_progress(view);
3632 		err = create_diff(s);
3633 		break;
3634 	case 'k':
3635 	case KEY_UP:
3636 		if (s->first_displayed_line > 1)
3637 			s->first_displayed_line--;
3638 		break;
3639 	case KEY_PPAGE:
3640 	case CTRL('b'):
3641 		if (s->first_displayed_line == 1)
3642 			break;
3643 		i = 0;
3644 		while (i++ < view->nlines - 1 &&
3645 		    s->first_displayed_line > 1)
3646 			s->first_displayed_line--;
3647 		break;
3648 	case 'j':
3649 	case KEY_DOWN:
3650 		if (!s->eof)
3651 			s->first_displayed_line++;
3652 		break;
3653 	case KEY_NPAGE:
3654 	case CTRL('f'):
3655 	case ' ':
3656 		if (s->eof)
3657 			break;
3658 		i = 0;
3659 		while (!s->eof && i++ < view->nlines - 1) {
3660 			char *line;
3661 			line = parse_next_line(s->f, NULL);
3662 			s->first_displayed_line++;
3663 			if (line == NULL)
3664 				break;
3665 		}
3666 		break;
3667 	case '[':
3668 		if (s->diff_context > 0) {
3669 			s->diff_context--;
3670 			diff_view_indicate_progress(view);
3671 			err = create_diff(s);
3672 			if (s->first_displayed_line + view->nlines - 1 >
3673 			    s->nlines) {
3674 				s->first_displayed_line = 1;
3675 				s->last_displayed_line = view->nlines;
3676 			}
3677 		}
3678 		break;
3679 	case ']':
3680 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
3681 			s->diff_context++;
3682 			diff_view_indicate_progress(view);
3683 			err = create_diff(s);
3684 		}
3685 		break;
3686 	case '<':
3687 	case ',':
3688 		if (s->log_view == NULL)
3689 			break;
3690 		ls = &s->log_view->state.log;
3691 		entry = TAILQ_PREV(ls->selected_entry,
3692 		    commit_queue_head, entry);
3693 		if (entry == NULL)
3694 			break;
3695 
3696 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3697 		    KEY_UP);
3698 		if (err)
3699 			break;
3700 
3701 		err = set_selected_commit(s, entry);
3702 		if (err)
3703 			break;
3704 
3705 		s->first_displayed_line = 1;
3706 		s->last_displayed_line = view->nlines;
3707 
3708 		diff_view_indicate_progress(view);
3709 		err = create_diff(s);
3710 		break;
3711 	case '>':
3712 	case '.':
3713 		if (s->log_view == NULL)
3714 			break;
3715 		ls = &s->log_view->state.log;
3716 
3717 		if (TAILQ_NEXT(ls->selected_entry, entry) == NULL) {
3718 			ls->thread_args.commits_needed++;
3719 			err = trigger_log_thread(s->log_view, 1);
3720 			if (err)
3721 				break;
3722 		}
3723 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3724 		    KEY_DOWN);
3725 		if (err)
3726 			break;
3727 
3728 		entry = TAILQ_NEXT(ls->selected_entry, entry);
3729 		if (entry == NULL)
3730 			break;
3731 
3732 		err = set_selected_commit(s, entry);
3733 		if (err)
3734 			break;
3735 
3736 		s->first_displayed_line = 1;
3737 		s->last_displayed_line = view->nlines;
3738 
3739 		diff_view_indicate_progress(view);
3740 		err = create_diff(s);
3741 		break;
3742 	default:
3743 		break;
3744 	}
3745 
3746 	return err;
3747 }
3748 
3749 static const struct got_error *
3750 cmd_diff(int argc, char *argv[])
3751 {
3752 	const struct got_error *error = NULL;
3753 	struct got_repository *repo = NULL;
3754 	struct got_worktree *worktree = NULL;
3755 	struct got_object_id *id1 = NULL, *id2 = NULL;
3756 	char *repo_path = NULL, *cwd = NULL;
3757 	char *id_str1 = NULL, *id_str2 = NULL;
3758 	char *label1 = NULL, *label2 = NULL;
3759 	int diff_context = 3, ignore_whitespace = 0;
3760 	int ch, force_text_diff = 0;
3761 	const char *errstr;
3762 	struct tog_view *view;
3763 
3764 #ifndef PROFILE
3765 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
3766 	    NULL) == -1)
3767 		err(1, "pledge");
3768 #endif
3769 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
3770 		switch (ch) {
3771 		case 'a':
3772 			force_text_diff = 1;
3773 			break;
3774 		case 'C':
3775 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
3776 			    &errstr);
3777 			if (errstr != NULL)
3778 				err(1, "-C option %s", errstr);
3779 			break;
3780 		case 'r':
3781 			repo_path = realpath(optarg, NULL);
3782 			if (repo_path == NULL)
3783 				return got_error_from_errno2("realpath",
3784 				    optarg);
3785 			got_path_strip_trailing_slashes(repo_path);
3786 			break;
3787 		case 'w':
3788 			ignore_whitespace = 1;
3789 			break;
3790 		default:
3791 			usage_diff();
3792 			/* NOTREACHED */
3793 		}
3794 	}
3795 
3796 	argc -= optind;
3797 	argv += optind;
3798 
3799 	if (argc == 0) {
3800 		usage_diff(); /* TODO show local worktree changes */
3801 	} else if (argc == 2) {
3802 		id_str1 = argv[0];
3803 		id_str2 = argv[1];
3804 	} else
3805 		usage_diff();
3806 
3807 	cwd = getcwd(NULL, 0);
3808 	if (cwd == NULL)
3809 		return got_error_from_errno("getcwd");
3810 
3811 	error = got_worktree_open(&worktree, cwd);
3812 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
3813 		goto done;
3814 
3815 	if (repo_path == NULL) {
3816 		if (worktree)
3817 			repo_path =
3818 			    strdup(got_worktree_get_repo_path(worktree));
3819 		else
3820 			repo_path = strdup(cwd);
3821 	}
3822 	if (repo_path == NULL) {
3823 		error = got_error_from_errno("strdup");
3824 		goto done;
3825 	}
3826 
3827 	error = got_repo_open(&repo, repo_path, NULL);
3828 	if (error)
3829 		goto done;
3830 
3831 	init_curses();
3832 
3833 	error = apply_unveil(got_repo_get_path(repo), NULL);
3834 	if (error)
3835 		goto done;
3836 
3837 	error = got_repo_match_object_id(&id1, &label1, id_str1,
3838 	    GOT_OBJ_TYPE_ANY, 1, repo);
3839 	if (error)
3840 		goto done;
3841 
3842 	error = got_repo_match_object_id(&id2, &label2, id_str2,
3843 	    GOT_OBJ_TYPE_ANY, 1, repo);
3844 	if (error)
3845 		goto done;
3846 
3847 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
3848 	if (view == NULL) {
3849 		error = got_error_from_errno("view_open");
3850 		goto done;
3851 	}
3852 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
3853 	    ignore_whitespace, force_text_diff, NULL,  repo);
3854 	if (error)
3855 		goto done;
3856 	error = view_loop(view);
3857 done:
3858 	free(label1);
3859 	free(label2);
3860 	free(repo_path);
3861 	free(cwd);
3862 	if (repo)
3863 		got_repo_close(repo);
3864 	if (worktree)
3865 		got_worktree_close(worktree);
3866 	return error;
3867 }
3868 
3869 __dead static void
3870 usage_blame(void)
3871 {
3872 	endwin();
3873 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
3874 	    getprogname());
3875 	exit(1);
3876 }
3877 
3878 struct tog_blame_line {
3879 	int annotated;
3880 	struct got_object_id *id;
3881 };
3882 
3883 static const struct got_error *
3884 draw_blame(struct tog_view *view)
3885 {
3886 	struct tog_blame_view_state *s = &view->state.blame;
3887 	struct tog_blame *blame = &s->blame;
3888 	regmatch_t *regmatch = &view->regmatch;
3889 	const struct got_error *err;
3890 	int lineno = 0, nprinted = 0;
3891 	char *line;
3892 	size_t len;
3893 	wchar_t *wline;
3894 	int width;
3895 	struct tog_blame_line *blame_line;
3896 	struct got_object_id *prev_id = NULL;
3897 	char *id_str;
3898 	struct tog_color *tc;
3899 
3900 	err = got_object_id_str(&id_str, s->blamed_commit->id);
3901 	if (err)
3902 		return err;
3903 
3904 	rewind(blame->f);
3905 	werase(view->window);
3906 
3907 	if (asprintf(&line, "commit %s", id_str) == -1) {
3908 		err = got_error_from_errno("asprintf");
3909 		free(id_str);
3910 		return err;
3911 	}
3912 
3913 	err = format_line(&wline, &width, line, view->ncols, 0);
3914 	free(line);
3915 	line = NULL;
3916 	if (err)
3917 		return err;
3918 	if (view_needs_focus_indication(view))
3919 		wstandout(view->window);
3920 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
3921 	if (tc)
3922 		wattr_on(view->window,
3923 		    COLOR_PAIR(tc->colorpair), NULL);
3924 	waddwstr(view->window, wline);
3925 	if (tc)
3926 		wattr_off(view->window,
3927 		    COLOR_PAIR(tc->colorpair), NULL);
3928 	if (view_needs_focus_indication(view))
3929 		wstandend(view->window);
3930 	free(wline);
3931 	wline = NULL;
3932 	if (width < view->ncols - 1)
3933 		waddch(view->window, '\n');
3934 
3935 	if (asprintf(&line, "[%d/%d] %s%s",
3936 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
3937 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
3938 		free(id_str);
3939 		return got_error_from_errno("asprintf");
3940 	}
3941 	free(id_str);
3942 	err = format_line(&wline, &width, line, view->ncols, 0);
3943 	free(line);
3944 	line = NULL;
3945 	if (err)
3946 		return err;
3947 	waddwstr(view->window, wline);
3948 	free(wline);
3949 	wline = NULL;
3950 	if (width < view->ncols - 1)
3951 		waddch(view->window, '\n');
3952 
3953 	s->eof = 0;
3954 	while (nprinted < view->nlines - 2) {
3955 		line = parse_next_line(blame->f, &len);
3956 		if (line == NULL) {
3957 			s->eof = 1;
3958 			break;
3959 		}
3960 		if (++lineno < s->first_displayed_line) {
3961 			free(line);
3962 			continue;
3963 		}
3964 
3965 		if (view->focussed && nprinted == s->selected_line - 1)
3966 			wstandout(view->window);
3967 
3968 		if (blame->nlines > 0) {
3969 			blame_line = &blame->lines[lineno - 1];
3970 			if (blame_line->annotated && prev_id &&
3971 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
3972 			    !(view->focussed &&
3973 			    nprinted == s->selected_line - 1)) {
3974 				waddstr(view->window, "        ");
3975 			} else if (blame_line->annotated) {
3976 				char *id_str;
3977 				err = got_object_id_str(&id_str, blame_line->id);
3978 				if (err) {
3979 					free(line);
3980 					return err;
3981 				}
3982 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
3983 				if (tc)
3984 					wattr_on(view->window,
3985 					    COLOR_PAIR(tc->colorpair), NULL);
3986 				wprintw(view->window, "%.8s", id_str);
3987 				if (tc)
3988 					wattr_off(view->window,
3989 					    COLOR_PAIR(tc->colorpair), NULL);
3990 				free(id_str);
3991 				prev_id = blame_line->id;
3992 			} else {
3993 				waddstr(view->window, "........");
3994 				prev_id = NULL;
3995 			}
3996 		} else {
3997 			waddstr(view->window, "........");
3998 			prev_id = NULL;
3999 		}
4000 
4001 		if (view->focussed && nprinted == s->selected_line - 1)
4002 			wstandend(view->window);
4003 		waddstr(view->window, " ");
4004 
4005 		if (view->ncols <= 9) {
4006 			width = 9;
4007 			wline = wcsdup(L"");
4008 			if (wline == NULL) {
4009 				err = got_error_from_errno("wcsdup");
4010 				free(line);
4011 				return err;
4012 			}
4013 		} else if (s->first_displayed_line + nprinted ==
4014 		    s->matched_line &&
4015 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4016 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4017 			    view->window, regmatch);
4018 			if (err) {
4019 				free(line);
4020 				return err;
4021 			}
4022 			width += 9;
4023 		} else {
4024 			err = format_line(&wline, &width, line,
4025 			    view->ncols - 9, 9);
4026 			waddwstr(view->window, wline);
4027 			free(wline);
4028 			wline = NULL;
4029 			width += 9;
4030 		}
4031 
4032 		if (width <= view->ncols - 1)
4033 			waddch(view->window, '\n');
4034 		if (++nprinted == 1)
4035 			s->first_displayed_line = lineno;
4036 		free(line);
4037 	}
4038 	s->last_displayed_line = lineno;
4039 
4040 	view_vborder(view);
4041 
4042 	return NULL;
4043 }
4044 
4045 static const struct got_error *
4046 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
4047 {
4048 	const struct got_error *err = NULL;
4049 	struct tog_blame_cb_args *a = arg;
4050 	struct tog_blame_line *line;
4051 	int errcode;
4052 
4053 	if (nlines != a->nlines ||
4054 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4055 		return got_error(GOT_ERR_RANGE);
4056 
4057 	errcode = pthread_mutex_lock(&tog_mutex);
4058 	if (errcode)
4059 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4060 
4061 	if (*a->quit) {	/* user has quit the blame view */
4062 		err = got_error(GOT_ERR_ITER_COMPLETED);
4063 		goto done;
4064 	}
4065 
4066 	if (lineno == -1)
4067 		goto done; /* no change in this commit */
4068 
4069 	line = &a->lines[lineno - 1];
4070 	if (line->annotated)
4071 		goto done;
4072 
4073 	line->id = got_object_id_dup(id);
4074 	if (line->id == NULL) {
4075 		err = got_error_from_errno("got_object_id_dup");
4076 		goto done;
4077 	}
4078 	line->annotated = 1;
4079 done:
4080 	errcode = pthread_mutex_unlock(&tog_mutex);
4081 	if (errcode)
4082 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4083 	return err;
4084 }
4085 
4086 static void *
4087 blame_thread(void *arg)
4088 {
4089 	const struct got_error *err;
4090 	struct tog_blame_thread_args *ta = arg;
4091 	struct tog_blame_cb_args *a = ta->cb_args;
4092 	int errcode;
4093 
4094 	err = block_signals_used_by_main_thread();
4095 	if (err)
4096 		return (void *)err;
4097 
4098 	err = got_blame(ta->path, a->commit_id, ta->repo,
4099 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4100 	if (err && err->code == GOT_ERR_CANCELLED)
4101 		err = NULL;
4102 
4103 	errcode = pthread_mutex_lock(&tog_mutex);
4104 	if (errcode)
4105 		return (void *)got_error_set_errno(errcode,
4106 		    "pthread_mutex_lock");
4107 
4108 	got_repo_close(ta->repo);
4109 	ta->repo = NULL;
4110 	*ta->complete = 1;
4111 
4112 	errcode = pthread_mutex_unlock(&tog_mutex);
4113 	if (errcode && err == NULL)
4114 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4115 
4116 	return (void *)err;
4117 }
4118 
4119 static struct got_object_id *
4120 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4121     int first_displayed_line, int selected_line)
4122 {
4123 	struct tog_blame_line *line;
4124 
4125 	if (nlines <= 0)
4126 		return NULL;
4127 
4128 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4129 	if (!line->annotated)
4130 		return NULL;
4131 
4132 	return line->id;
4133 }
4134 
4135 static const struct got_error *
4136 stop_blame(struct tog_blame *blame)
4137 {
4138 	const struct got_error *err = NULL;
4139 	int i;
4140 
4141 	if (blame->thread) {
4142 		int errcode;
4143 		errcode = pthread_mutex_unlock(&tog_mutex);
4144 		if (errcode)
4145 			return got_error_set_errno(errcode,
4146 			    "pthread_mutex_unlock");
4147 		errcode = pthread_join(blame->thread, (void **)&err);
4148 		if (errcode)
4149 			return got_error_set_errno(errcode, "pthread_join");
4150 		errcode = pthread_mutex_lock(&tog_mutex);
4151 		if (errcode)
4152 			return got_error_set_errno(errcode,
4153 			    "pthread_mutex_lock");
4154 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4155 			err = NULL;
4156 		blame->thread = NULL;
4157 	}
4158 	if (blame->thread_args.repo) {
4159 		got_repo_close(blame->thread_args.repo);
4160 		blame->thread_args.repo = NULL;
4161 	}
4162 	if (blame->f) {
4163 		if (fclose(blame->f) != 0 && err == NULL)
4164 			err = got_error_from_errno("fclose");
4165 		blame->f = NULL;
4166 	}
4167 	if (blame->lines) {
4168 		for (i = 0; i < blame->nlines; i++)
4169 			free(blame->lines[i].id);
4170 		free(blame->lines);
4171 		blame->lines = NULL;
4172 	}
4173 	free(blame->cb_args.commit_id);
4174 	blame->cb_args.commit_id = NULL;
4175 
4176 	return err;
4177 }
4178 
4179 static const struct got_error *
4180 cancel_blame_view(void *arg)
4181 {
4182 	const struct got_error *err = NULL;
4183 	int *done = arg;
4184 	int errcode;
4185 
4186 	errcode = pthread_mutex_lock(&tog_mutex);
4187 	if (errcode)
4188 		return got_error_set_errno(errcode,
4189 		    "pthread_mutex_unlock");
4190 
4191 	if (*done)
4192 		err = got_error(GOT_ERR_CANCELLED);
4193 
4194 	errcode = pthread_mutex_unlock(&tog_mutex);
4195 	if (errcode)
4196 		return got_error_set_errno(errcode,
4197 		    "pthread_mutex_lock");
4198 
4199 	return err;
4200 }
4201 
4202 static const struct got_error *
4203 run_blame(struct tog_view *view)
4204 {
4205 	struct tog_blame_view_state *s = &view->state.blame;
4206 	struct tog_blame *blame = &s->blame;
4207 	const struct got_error *err = NULL;
4208 	struct got_blob_object *blob = NULL;
4209 	struct got_repository *thread_repo = NULL;
4210 	struct got_object_id *obj_id = NULL;
4211 	int obj_type;
4212 
4213 	err = got_object_id_by_path(&obj_id, s->repo, s->blamed_commit->id,
4214 	    s->path);
4215 	if (err)
4216 		return err;
4217 
4218 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4219 	if (err)
4220 		goto done;
4221 
4222 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4223 		err = got_error(GOT_ERR_OBJ_TYPE);
4224 		goto done;
4225 	}
4226 
4227 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4228 	if (err)
4229 		goto done;
4230 	blame->f = got_opentemp();
4231 	if (blame->f == NULL) {
4232 		err = got_error_from_errno("got_opentemp");
4233 		goto done;
4234 	}
4235 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4236 	    &blame->line_offsets, blame->f, blob);
4237 	if (err || blame->nlines == 0)
4238 		goto done;
4239 
4240 	/* Don't include \n at EOF in the blame line count. */
4241 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4242 		blame->nlines--;
4243 
4244 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4245 	if (blame->lines == NULL) {
4246 		err = got_error_from_errno("calloc");
4247 		goto done;
4248 	}
4249 
4250 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL);
4251 	if (err)
4252 		goto done;
4253 
4254 	blame->cb_args.view = view;
4255 	blame->cb_args.lines = blame->lines;
4256 	blame->cb_args.nlines = blame->nlines;
4257 	blame->cb_args.commit_id = got_object_id_dup(s->blamed_commit->id);
4258 	if (blame->cb_args.commit_id == NULL) {
4259 		err = got_error_from_errno("got_object_id_dup");
4260 		goto done;
4261 	}
4262 	blame->cb_args.quit = &s->done;
4263 
4264 	blame->thread_args.path = s->path;
4265 	blame->thread_args.repo = thread_repo;
4266 	blame->thread_args.cb_args = &blame->cb_args;
4267 	blame->thread_args.complete = &s->blame_complete;
4268 	blame->thread_args.cancel_cb = cancel_blame_view;
4269 	blame->thread_args.cancel_arg = &s->done;
4270 	s->blame_complete = 0;
4271 
4272 done:
4273 	if (blob)
4274 		got_object_blob_close(blob);
4275 	free(obj_id);
4276 	if (err)
4277 		stop_blame(blame);
4278 	return err;
4279 }
4280 
4281 static const struct got_error *
4282 open_blame_view(struct tog_view *view, char *path,
4283     struct got_object_id *commit_id, struct got_repository *repo)
4284 {
4285 	const struct got_error *err = NULL;
4286 	struct tog_blame_view_state *s = &view->state.blame;
4287 
4288 	SIMPLEQ_INIT(&s->blamed_commits);
4289 
4290 	s->path = strdup(path);
4291 	if (s->path == NULL)
4292 		return got_error_from_errno("strdup");
4293 
4294 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4295 	if (err) {
4296 		free(s->path);
4297 		return err;
4298 	}
4299 
4300 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4301 	s->first_displayed_line = 1;
4302 	s->last_displayed_line = view->nlines;
4303 	s->selected_line = 1;
4304 	s->blame_complete = 0;
4305 	s->repo = repo;
4306 	s->commit_id = commit_id;
4307 	memset(&s->blame, 0, sizeof(s->blame));
4308 
4309 	SIMPLEQ_INIT(&s->colors);
4310 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4311 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4312 		    get_color_value("TOG_COLOR_COMMIT"));
4313 		if (err)
4314 			return err;
4315 	}
4316 
4317 	view->show = show_blame_view;
4318 	view->input = input_blame_view;
4319 	view->close = close_blame_view;
4320 	view->search_start = search_start_blame_view;
4321 	view->search_next = search_next_blame_view;
4322 
4323 	return run_blame(view);
4324 }
4325 
4326 static const struct got_error *
4327 close_blame_view(struct tog_view *view)
4328 {
4329 	const struct got_error *err = NULL;
4330 	struct tog_blame_view_state *s = &view->state.blame;
4331 
4332 	if (s->blame.thread)
4333 		err = stop_blame(&s->blame);
4334 
4335 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
4336 		struct got_object_qid *blamed_commit;
4337 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
4338 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4339 		got_object_qid_free(blamed_commit);
4340 	}
4341 
4342 	free(s->path);
4343 	free_colors(&s->colors);
4344 
4345 	return err;
4346 }
4347 
4348 static const struct got_error *
4349 search_start_blame_view(struct tog_view *view)
4350 {
4351 	struct tog_blame_view_state *s = &view->state.blame;
4352 
4353 	s->matched_line = 0;
4354 	return NULL;
4355 }
4356 
4357 static const struct got_error *
4358 search_next_blame_view(struct tog_view *view)
4359 {
4360 	struct tog_blame_view_state *s = &view->state.blame;
4361 	int lineno;
4362 
4363 	if (!view->searching) {
4364 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4365 		return NULL;
4366 	}
4367 
4368 	if (s->matched_line) {
4369 		if (view->searching == TOG_SEARCH_FORWARD)
4370 			lineno = s->matched_line + 1;
4371 		else
4372 			lineno = s->matched_line - 1;
4373 	} else {
4374 		if (view->searching == TOG_SEARCH_FORWARD)
4375 			lineno = 1;
4376 		else
4377 			lineno = s->blame.nlines;
4378 	}
4379 
4380 	while (1) {
4381 		char *line = NULL;
4382 		off_t offset;
4383 		size_t len;
4384 
4385 		if (lineno <= 0 || lineno > s->blame.nlines) {
4386 			if (s->matched_line == 0) {
4387 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4388 				free(line);
4389 				break;
4390 			}
4391 
4392 			if (view->searching == TOG_SEARCH_FORWARD)
4393 				lineno = 1;
4394 			else
4395 				lineno = s->blame.nlines;
4396 		}
4397 
4398 		offset = s->blame.line_offsets[lineno - 1];
4399 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4400 			free(line);
4401 			return got_error_from_errno("fseeko");
4402 		}
4403 		free(line);
4404 		line = parse_next_line(s->blame.f, &len);
4405 		if (line &&
4406 		    match_line(line, &view->regex, 1, &view->regmatch)) {
4407 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
4408 			s->matched_line = lineno;
4409 			free(line);
4410 			break;
4411 		}
4412 		free(line);
4413 		if (view->searching == TOG_SEARCH_FORWARD)
4414 			lineno++;
4415 		else
4416 			lineno--;
4417 	}
4418 
4419 	if (s->matched_line) {
4420 		s->first_displayed_line = s->matched_line;
4421 		s->selected_line = 1;
4422 	}
4423 
4424 	return NULL;
4425 }
4426 
4427 static const struct got_error *
4428 show_blame_view(struct tog_view *view)
4429 {
4430 	const struct got_error *err = NULL;
4431 	struct tog_blame_view_state *s = &view->state.blame;
4432 	int errcode;
4433 
4434 	if (s->blame.thread == NULL) {
4435 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4436 		    &s->blame.thread_args);
4437 		if (errcode)
4438 			return got_error_set_errno(errcode, "pthread_create");
4439 
4440 		halfdelay(1); /* fast refresh while annotating  */
4441 	}
4442 
4443 	if (s->blame_complete)
4444 		halfdelay(10); /* disable fast refresh */
4445 
4446 	err = draw_blame(view);
4447 
4448 	view_vborder(view);
4449 	return err;
4450 }
4451 
4452 static const struct got_error *
4453 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
4454     struct tog_view **focus_view, struct tog_view *view, int ch)
4455 {
4456 	const struct got_error *err = NULL, *thread_err = NULL;
4457 	struct tog_view *diff_view;
4458 	struct tog_blame_view_state *s = &view->state.blame;
4459 	int begin_x = 0;
4460 
4461 	switch (ch) {
4462 	case 'q':
4463 		s->done = 1;
4464 		break;
4465 	case 'k':
4466 	case KEY_UP:
4467 		if (s->selected_line > 1)
4468 			s->selected_line--;
4469 		else if (s->selected_line == 1 &&
4470 		    s->first_displayed_line > 1)
4471 			s->first_displayed_line--;
4472 		break;
4473 	case KEY_PPAGE:
4474 	case CTRL('b'):
4475 		if (s->first_displayed_line == 1) {
4476 			s->selected_line = 1;
4477 			break;
4478 		}
4479 		if (s->first_displayed_line > view->nlines - 2)
4480 			s->first_displayed_line -=
4481 			    (view->nlines - 2);
4482 		else
4483 			s->first_displayed_line = 1;
4484 		break;
4485 	case 'j':
4486 	case KEY_DOWN:
4487 		if (s->selected_line < view->nlines - 2 &&
4488 		    s->first_displayed_line +
4489 		    s->selected_line <= s->blame.nlines)
4490 			s->selected_line++;
4491 		else if (s->last_displayed_line <
4492 		    s->blame.nlines)
4493 			s->first_displayed_line++;
4494 		break;
4495 	case 'b':
4496 	case 'p': {
4497 		struct got_object_id *id = NULL;
4498 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4499 		    s->first_displayed_line, s->selected_line);
4500 		if (id == NULL)
4501 			break;
4502 		if (ch == 'p') {
4503 			struct got_commit_object *commit;
4504 			struct got_object_qid *pid;
4505 			struct got_object_id *blob_id = NULL;
4506 			int obj_type;
4507 			err = got_object_open_as_commit(&commit,
4508 			    s->repo, id);
4509 			if (err)
4510 				break;
4511 			pid = SIMPLEQ_FIRST(
4512 			    got_object_commit_get_parent_ids(commit));
4513 			if (pid == NULL) {
4514 				got_object_commit_close(commit);
4515 				break;
4516 			}
4517 			/* Check if path history ends here. */
4518 			err = got_object_id_by_path(&blob_id, s->repo,
4519 			    pid->id, s->path);
4520 			if (err) {
4521 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
4522 					err = NULL;
4523 				got_object_commit_close(commit);
4524 				break;
4525 			}
4526 			err = got_object_get_type(&obj_type, s->repo,
4527 			    blob_id);
4528 			free(blob_id);
4529 			/* Can't blame non-blob type objects. */
4530 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
4531 				got_object_commit_close(commit);
4532 				break;
4533 			}
4534 			err = got_object_qid_alloc(&s->blamed_commit,
4535 			    pid->id);
4536 			got_object_commit_close(commit);
4537 		} else {
4538 			if (got_object_id_cmp(id,
4539 			    s->blamed_commit->id) == 0)
4540 				break;
4541 			err = got_object_qid_alloc(&s->blamed_commit,
4542 			    id);
4543 		}
4544 		if (err)
4545 			break;
4546 		s->done = 1;
4547 		thread_err = stop_blame(&s->blame);
4548 		s->done = 0;
4549 		if (thread_err)
4550 			break;
4551 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
4552 		    s->blamed_commit, entry);
4553 		err = run_blame(view);
4554 		if (err)
4555 			break;
4556 		break;
4557 	}
4558 	case 'B': {
4559 		struct got_object_qid *first;
4560 		first = SIMPLEQ_FIRST(&s->blamed_commits);
4561 		if (!got_object_id_cmp(first->id, s->commit_id))
4562 			break;
4563 		s->done = 1;
4564 		thread_err = stop_blame(&s->blame);
4565 		s->done = 0;
4566 		if (thread_err)
4567 			break;
4568 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4569 		got_object_qid_free(s->blamed_commit);
4570 		s->blamed_commit =
4571 		    SIMPLEQ_FIRST(&s->blamed_commits);
4572 		err = run_blame(view);
4573 		if (err)
4574 			break;
4575 		break;
4576 	}
4577 	case KEY_ENTER:
4578 	case '\r': {
4579 		struct got_object_id *id = NULL;
4580 		struct got_object_qid *pid;
4581 		struct got_commit_object *commit = NULL;
4582 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4583 		    s->first_displayed_line, s->selected_line);
4584 		if (id == NULL)
4585 			break;
4586 		err = got_object_open_as_commit(&commit, s->repo, id);
4587 		if (err)
4588 			break;
4589 		pid = SIMPLEQ_FIRST(
4590 		    got_object_commit_get_parent_ids(commit));
4591 		if (view_is_parent_view(view))
4592 		    begin_x = view_split_begin_x(view->begin_x);
4593 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
4594 		if (diff_view == NULL) {
4595 			got_object_commit_close(commit);
4596 			err = got_error_from_errno("view_open");
4597 			break;
4598 		}
4599 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
4600 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
4601 		got_object_commit_close(commit);
4602 		if (err) {
4603 			view_close(diff_view);
4604 			break;
4605 		}
4606 		if (view_is_parent_view(view)) {
4607 			err = view_close_child(view);
4608 			if (err)
4609 				break;
4610 			err = view_set_child(view, diff_view);
4611 			if (err) {
4612 				view_close(diff_view);
4613 				break;
4614 			}
4615 			*focus_view = diff_view;
4616 			view->child_focussed = 1;
4617 		} else
4618 			*new_view = diff_view;
4619 		if (err)
4620 			break;
4621 		break;
4622 	}
4623 	case KEY_NPAGE:
4624 	case CTRL('f'):
4625 	case ' ':
4626 		if (s->last_displayed_line >= s->blame.nlines &&
4627 		    s->selected_line >= MIN(s->blame.nlines,
4628 		    view->nlines - 2)) {
4629 			break;
4630 		}
4631 		if (s->last_displayed_line >= s->blame.nlines &&
4632 		    s->selected_line < view->nlines - 2) {
4633 			s->selected_line = MIN(s->blame.nlines,
4634 			    view->nlines - 2);
4635 			break;
4636 		}
4637 		if (s->last_displayed_line + view->nlines - 2
4638 		    <= s->blame.nlines)
4639 			s->first_displayed_line +=
4640 			    view->nlines - 2;
4641 		else
4642 			s->first_displayed_line =
4643 			    s->blame.nlines -
4644 			    (view->nlines - 3);
4645 		break;
4646 	case KEY_RESIZE:
4647 		if (s->selected_line > view->nlines - 2) {
4648 			s->selected_line = MIN(s->blame.nlines,
4649 			    view->nlines - 2);
4650 		}
4651 		break;
4652 	default:
4653 		break;
4654 	}
4655 	return thread_err ? thread_err : err;
4656 }
4657 
4658 static const struct got_error *
4659 cmd_blame(int argc, char *argv[])
4660 {
4661 	const struct got_error *error;
4662 	struct got_repository *repo = NULL;
4663 	struct got_worktree *worktree = NULL;
4664 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4665 	char *link_target = NULL;
4666 	struct got_object_id *commit_id = NULL;
4667 	char *commit_id_str = NULL;
4668 	int ch;
4669 	struct tog_view *view;
4670 
4671 #ifndef PROFILE
4672 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4673 	    NULL) == -1)
4674 		err(1, "pledge");
4675 #endif
4676 
4677 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
4678 		switch (ch) {
4679 		case 'c':
4680 			commit_id_str = optarg;
4681 			break;
4682 		case 'r':
4683 			repo_path = realpath(optarg, NULL);
4684 			if (repo_path == NULL)
4685 				return got_error_from_errno2("realpath",
4686 				    optarg);
4687 			break;
4688 		default:
4689 			usage_blame();
4690 			/* NOTREACHED */
4691 		}
4692 	}
4693 
4694 	argc -= optind;
4695 	argv += optind;
4696 
4697 	if (argc != 1)
4698 		usage_blame();
4699 
4700 	cwd = getcwd(NULL, 0);
4701 	if (cwd == NULL)
4702 		return got_error_from_errno("getcwd");
4703 
4704 	error = got_worktree_open(&worktree, cwd);
4705 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
4706 		goto done;
4707 
4708 	if (repo_path == NULL) {
4709 		if (worktree)
4710 			repo_path =
4711 			    strdup(got_worktree_get_repo_path(worktree));
4712 		else
4713 			repo_path = strdup(cwd);
4714 	}
4715 	if (repo_path == NULL) {
4716 		error = got_error_from_errno("strdup");
4717 		goto done;
4718 	}
4719 
4720 	error = got_repo_open(&repo, repo_path, NULL);
4721 	if (error != NULL)
4722 		goto done;
4723 
4724 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
4725 	    worktree);
4726 	if (error)
4727 		goto done;
4728 
4729 	init_curses();
4730 
4731 	error = apply_unveil(got_repo_get_path(repo), NULL);
4732 	if (error)
4733 		goto done;
4734 
4735 	if (commit_id_str == NULL) {
4736 		struct got_reference *head_ref;
4737 		error = got_ref_open(&head_ref, repo, worktree ?
4738 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
4739 		if (error != NULL)
4740 			goto done;
4741 		error = got_ref_resolve(&commit_id, repo, head_ref);
4742 		got_ref_close(head_ref);
4743 	} else {
4744 		error = got_repo_match_object_id(&commit_id, NULL,
4745 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, 1, repo);
4746 	}
4747 	if (error != NULL)
4748 		goto done;
4749 
4750 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
4751 	if (view == NULL) {
4752 		error = got_error_from_errno("view_open");
4753 		goto done;
4754 	}
4755 
4756 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
4757 	    commit_id, repo);
4758 	if (error)
4759 		goto done;
4760 
4761 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
4762 	    commit_id, repo);
4763 	if (error)
4764 		goto done;
4765 	if (worktree) {
4766 		/* Release work tree lock. */
4767 		got_worktree_close(worktree);
4768 		worktree = NULL;
4769 	}
4770 	error = view_loop(view);
4771 done:
4772 	free(repo_path);
4773 	free(in_repo_path);
4774 	free(link_target);
4775 	free(cwd);
4776 	free(commit_id);
4777 	if (worktree)
4778 		got_worktree_close(worktree);
4779 	if (repo)
4780 		got_repo_close(repo);
4781 	return error;
4782 }
4783 
4784 static const struct got_error *
4785 draw_tree_entries(struct tog_view *view, const char *parent_path)
4786 {
4787 	struct tog_tree_view_state *s = &view->state.tree;
4788 	const struct got_error *err = NULL;
4789 	struct got_tree_entry *te;
4790 	wchar_t *wline;
4791 	struct tog_color *tc;
4792 	int width, n, i, nentries;
4793 	int limit = view->nlines;
4794 
4795 	s->ndisplayed = 0;
4796 
4797 	werase(view->window);
4798 
4799 	if (limit == 0)
4800 		return NULL;
4801 
4802 	err = format_line(&wline, &width, s->tree_label, view->ncols, 0);
4803 	if (err)
4804 		return err;
4805 	if (view_needs_focus_indication(view))
4806 		wstandout(view->window);
4807 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4808 	if (tc)
4809 		wattr_on(view->window,
4810 		    COLOR_PAIR(tc->colorpair), NULL);
4811 	waddwstr(view->window, wline);
4812 	if (tc)
4813 		wattr_off(view->window,
4814 		    COLOR_PAIR(tc->colorpair), NULL);
4815 	if (view_needs_focus_indication(view))
4816 		wstandend(view->window);
4817 	free(wline);
4818 	wline = NULL;
4819 	if (width < view->ncols - 1)
4820 		waddch(view->window, '\n');
4821 	if (--limit <= 0)
4822 		return NULL;
4823 	err = format_line(&wline, &width, parent_path, view->ncols, 0);
4824 	if (err)
4825 		return err;
4826 	waddwstr(view->window, wline);
4827 	free(wline);
4828 	wline = NULL;
4829 	if (width < view->ncols - 1)
4830 		waddch(view->window, '\n');
4831 	if (--limit <= 0)
4832 		return NULL;
4833 	waddch(view->window, '\n');
4834 	if (--limit <= 0)
4835 		return NULL;
4836 
4837 	if (s->first_displayed_entry == NULL) {
4838 		te = got_object_tree_get_first_entry(s->tree);
4839 		if (s->selected == 0) {
4840 			if (view->focussed)
4841 				wstandout(view->window);
4842 			s->selected_entry = NULL;
4843 		}
4844 		waddstr(view->window, "  ..\n");	/* parent directory */
4845 		if (s->selected == 0 && view->focussed)
4846 			wstandend(view->window);
4847 		s->ndisplayed++;
4848 		if (--limit <= 0)
4849 			return NULL;
4850 		n = 1;
4851 	} else {
4852 		n = 0;
4853 		te = s->first_displayed_entry;
4854 	}
4855 
4856 	nentries = got_object_tree_get_nentries(s->tree);
4857 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
4858 		char *line = NULL, *id_str = NULL, *link_target = NULL;
4859 		const char *modestr = "";
4860 		mode_t mode;
4861 
4862 		te = got_object_tree_get_entry(s->tree, i);
4863 		mode = got_tree_entry_get_mode(te);
4864 
4865 		if (s->show_ids) {
4866 			err = got_object_id_str(&id_str,
4867 			    got_tree_entry_get_id(te));
4868 			if (err)
4869 				return got_error_from_errno(
4870 				    "got_object_id_str");
4871 		}
4872 		if (got_object_tree_entry_is_submodule(te))
4873 			modestr = "$";
4874 		else if (S_ISLNK(mode)) {
4875 			int i;
4876 
4877 			err = got_tree_entry_get_symlink_target(&link_target,
4878 			    te, s->repo);
4879 			if (err) {
4880 				free(id_str);
4881 				return err;
4882 			}
4883 			for (i = 0; i < strlen(link_target); i++) {
4884 				if (!isprint((unsigned char)link_target[i]))
4885 					link_target[i] = '?';
4886 			}
4887 			modestr = "@";
4888 		}
4889 		else if (S_ISDIR(mode))
4890 			modestr = "/";
4891 		else if (mode & S_IXUSR)
4892 			modestr = "*";
4893 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
4894 		    got_tree_entry_get_name(te), modestr,
4895 		    link_target ? " -> ": "",
4896 		    link_target ? link_target : "") == -1) {
4897 			free(id_str);
4898 			free(link_target);
4899 			return got_error_from_errno("asprintf");
4900 		}
4901 		free(id_str);
4902 		free(link_target);
4903 		err = format_line(&wline, &width, line, view->ncols, 0);
4904 		if (err) {
4905 			free(line);
4906 			break;
4907 		}
4908 		if (n == s->selected) {
4909 			if (view->focussed)
4910 				wstandout(view->window);
4911 			s->selected_entry = te;
4912 		}
4913 		tc = match_color(&s->colors, line);
4914 		if (tc)
4915 			wattr_on(view->window,
4916 			    COLOR_PAIR(tc->colorpair), NULL);
4917 		waddwstr(view->window, wline);
4918 		if (tc)
4919 			wattr_off(view->window,
4920 			    COLOR_PAIR(tc->colorpair), NULL);
4921 		if (width < view->ncols - 1)
4922 			waddch(view->window, '\n');
4923 		if (n == s->selected && view->focussed)
4924 			wstandend(view->window);
4925 		free(line);
4926 		free(wline);
4927 		wline = NULL;
4928 		n++;
4929 		s->ndisplayed++;
4930 		s->last_displayed_entry = te;
4931 		if (--limit <= 0)
4932 			break;
4933 	}
4934 
4935 	return err;
4936 }
4937 
4938 static void
4939 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
4940 {
4941 	struct got_tree_entry *te;
4942 	int isroot = s->tree == s->root;
4943 	int i = 0;
4944 
4945 	if (s->first_displayed_entry == NULL)
4946 		return;
4947 
4948 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
4949 	while (i++ < maxscroll) {
4950 		if (te == NULL) {
4951 			if (!isroot)
4952 				s->first_displayed_entry = NULL;
4953 			break;
4954 		}
4955 		s->first_displayed_entry = te;
4956 		te = got_tree_entry_get_prev(s->tree, te);
4957 	}
4958 }
4959 
4960 static void
4961 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
4962 {
4963 	struct got_tree_entry *next, *last;
4964 	int n = 0;
4965 
4966 	if (s->first_displayed_entry)
4967 		next = got_tree_entry_get_next(s->tree,
4968 		    s->first_displayed_entry);
4969 	else
4970 		next = got_object_tree_get_first_entry(s->tree);
4971 
4972 	last = s->last_displayed_entry;
4973 	while (next && last && n++ < maxscroll) {
4974 		last = got_tree_entry_get_next(s->tree, last);
4975 		if (last) {
4976 			s->first_displayed_entry = next;
4977 			next = got_tree_entry_get_next(s->tree, next);
4978 		}
4979 	}
4980 }
4981 
4982 static const struct got_error *
4983 tree_entry_path(char **path, struct tog_parent_trees *parents,
4984     struct got_tree_entry *te)
4985 {
4986 	const struct got_error *err = NULL;
4987 	struct tog_parent_tree *pt;
4988 	size_t len = 2; /* for leading slash and NUL */
4989 
4990 	TAILQ_FOREACH(pt, parents, entry)
4991 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
4992 		    + 1 /* slash */;
4993 	if (te)
4994 		len += strlen(got_tree_entry_get_name(te));
4995 
4996 	*path = calloc(1, len);
4997 	if (path == NULL)
4998 		return got_error_from_errno("calloc");
4999 
5000 	(*path)[0] = '/';
5001 	pt = TAILQ_LAST(parents, tog_parent_trees);
5002 	while (pt) {
5003 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5004 		if (strlcat(*path, name, len) >= len) {
5005 			err = got_error(GOT_ERR_NO_SPACE);
5006 			goto done;
5007 		}
5008 		if (strlcat(*path, "/", len) >= len) {
5009 			err = got_error(GOT_ERR_NO_SPACE);
5010 			goto done;
5011 		}
5012 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5013 	}
5014 	if (te) {
5015 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5016 			err = got_error(GOT_ERR_NO_SPACE);
5017 			goto done;
5018 		}
5019 	}
5020 done:
5021 	if (err) {
5022 		free(*path);
5023 		*path = NULL;
5024 	}
5025 	return err;
5026 }
5027 
5028 static const struct got_error *
5029 blame_tree_entry(struct tog_view **new_view, int begin_x,
5030     struct got_tree_entry *te, struct tog_parent_trees *parents,
5031     struct got_object_id *commit_id, struct got_repository *repo)
5032 {
5033 	const struct got_error *err = NULL;
5034 	char *path;
5035 	struct tog_view *blame_view;
5036 
5037 	*new_view = NULL;
5038 
5039 	err = tree_entry_path(&path, parents, te);
5040 	if (err)
5041 		return err;
5042 
5043 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5044 	if (blame_view == NULL) {
5045 		err = got_error_from_errno("view_open");
5046 		goto done;
5047 	}
5048 
5049 	err = open_blame_view(blame_view, path, commit_id, repo);
5050 	if (err) {
5051 		if (err->code == GOT_ERR_CANCELLED)
5052 			err = NULL;
5053 		view_close(blame_view);
5054 	} else
5055 		*new_view = blame_view;
5056 done:
5057 	free(path);
5058 	return err;
5059 }
5060 
5061 static const struct got_error *
5062 log_tree_entry(struct tog_view **new_view, int begin_x,
5063     struct got_tree_entry *te, struct tog_parent_trees *parents,
5064     struct got_object_id *commit_id, struct got_repository *repo)
5065 {
5066 	struct tog_view *log_view;
5067 	const struct got_error *err = NULL;
5068 	char *path;
5069 
5070 	*new_view = NULL;
5071 
5072 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5073 	if (log_view == NULL)
5074 		return got_error_from_errno("view_open");
5075 
5076 	err = tree_entry_path(&path, parents, te);
5077 	if (err)
5078 		return err;
5079 
5080 	err = open_log_view(log_view, commit_id, repo, NULL, path, 0);
5081 	if (err)
5082 		view_close(log_view);
5083 	else
5084 		*new_view = log_view;
5085 	free(path);
5086 	return err;
5087 }
5088 
5089 static const struct got_error *
5090 open_tree_view(struct tog_view *view, struct got_tree_object *root,
5091     struct got_object_id *commit_id, struct got_repository *repo)
5092 {
5093 	const struct got_error *err = NULL;
5094 	char *commit_id_str = NULL;
5095 	struct tog_tree_view_state *s = &view->state.tree;
5096 
5097 	TAILQ_INIT(&s->parents);
5098 
5099 	err = got_object_id_str(&commit_id_str, commit_id);
5100 	if (err != NULL)
5101 		goto done;
5102 
5103 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5104 		err = got_error_from_errno("asprintf");
5105 		goto done;
5106 	}
5107 
5108 	s->root = s->tree = root;
5109 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5110 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5111 	s->commit_id = got_object_id_dup(commit_id);
5112 	if (s->commit_id == NULL) {
5113 		err = got_error_from_errno("got_object_id_dup");
5114 		goto done;
5115 	}
5116 	s->repo = repo;
5117 
5118 	SIMPLEQ_INIT(&s->colors);
5119 
5120 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5121 		err = add_color(&s->colors, "\\$$",
5122 		    TOG_COLOR_TREE_SUBMODULE,
5123 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5124 		if (err)
5125 			goto done;
5126 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5127 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5128 		if (err) {
5129 			free_colors(&s->colors);
5130 			goto done;
5131 		}
5132 		err = add_color(&s->colors, "/$",
5133 		    TOG_COLOR_TREE_DIRECTORY,
5134 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5135 		if (err) {
5136 			free_colors(&s->colors);
5137 			goto done;
5138 		}
5139 
5140 		err = add_color(&s->colors, "\\*$",
5141 		    TOG_COLOR_TREE_EXECUTABLE,
5142 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5143 		if (err) {
5144 			free_colors(&s->colors);
5145 			goto done;
5146 		}
5147 
5148 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5149 		    get_color_value("TOG_COLOR_COMMIT"));
5150 		if (err) {
5151 			free_colors(&s->colors);
5152 			goto done;
5153 		}
5154 	}
5155 
5156 	view->show = show_tree_view;
5157 	view->input = input_tree_view;
5158 	view->close = close_tree_view;
5159 	view->search_start = search_start_tree_view;
5160 	view->search_next = search_next_tree_view;
5161 done:
5162 	free(commit_id_str);
5163 	if (err) {
5164 		free(s->tree_label);
5165 		s->tree_label = NULL;
5166 	}
5167 	return err;
5168 }
5169 
5170 static const struct got_error *
5171 close_tree_view(struct tog_view *view)
5172 {
5173 	struct tog_tree_view_state *s = &view->state.tree;
5174 
5175 	free_colors(&s->colors);
5176 	free(s->tree_label);
5177 	s->tree_label = NULL;
5178 	free(s->commit_id);
5179 	s->commit_id = NULL;
5180 	while (!TAILQ_EMPTY(&s->parents)) {
5181 		struct tog_parent_tree *parent;
5182 		parent = TAILQ_FIRST(&s->parents);
5183 		TAILQ_REMOVE(&s->parents, parent, entry);
5184 		free(parent);
5185 
5186 	}
5187 	if (s->tree != s->root)
5188 		got_object_tree_close(s->tree);
5189 	got_object_tree_close(s->root);
5190 	return NULL;
5191 }
5192 
5193 static const struct got_error *
5194 search_start_tree_view(struct tog_view *view)
5195 {
5196 	struct tog_tree_view_state *s = &view->state.tree;
5197 
5198 	s->matched_entry = NULL;
5199 	return NULL;
5200 }
5201 
5202 static int
5203 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5204 {
5205 	regmatch_t regmatch;
5206 
5207 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5208 	    0) == 0;
5209 }
5210 
5211 static const struct got_error *
5212 search_next_tree_view(struct tog_view *view)
5213 {
5214 	struct tog_tree_view_state *s = &view->state.tree;
5215 	struct got_tree_entry *te = NULL;
5216 
5217 	if (!view->searching) {
5218 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5219 		return NULL;
5220 	}
5221 
5222 	if (s->matched_entry) {
5223 		if (view->searching == TOG_SEARCH_FORWARD) {
5224 			if (s->selected_entry)
5225 				te = got_tree_entry_get_next(s->tree,
5226 				    s->selected_entry);
5227 			else
5228 				te = got_object_tree_get_first_entry(s->tree);
5229 		} else {
5230 			if (s->selected_entry == NULL)
5231 				te = got_object_tree_get_last_entry(s->tree);
5232 			else
5233 				te = got_tree_entry_get_prev(s->tree,
5234 				    s->selected_entry);
5235 		}
5236 	} else {
5237 		if (view->searching == TOG_SEARCH_FORWARD)
5238 			te = got_object_tree_get_first_entry(s->tree);
5239 		else
5240 			te = got_object_tree_get_last_entry(s->tree);
5241 	}
5242 
5243 	while (1) {
5244 		if (te == NULL) {
5245 			if (s->matched_entry == NULL) {
5246 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5247 				return NULL;
5248 			}
5249 			if (view->searching == TOG_SEARCH_FORWARD)
5250 				te = got_object_tree_get_first_entry(s->tree);
5251 			else
5252 				te = got_object_tree_get_last_entry(s->tree);
5253 		}
5254 
5255 		if (match_tree_entry(te, &view->regex)) {
5256 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5257 			s->matched_entry = te;
5258 			break;
5259 		}
5260 
5261 		if (view->searching == TOG_SEARCH_FORWARD)
5262 			te = got_tree_entry_get_next(s->tree, te);
5263 		else
5264 			te = got_tree_entry_get_prev(s->tree, te);
5265 	}
5266 
5267 	if (s->matched_entry) {
5268 		s->first_displayed_entry = s->matched_entry;
5269 		s->selected = 0;
5270 	}
5271 
5272 	return NULL;
5273 }
5274 
5275 static const struct got_error *
5276 show_tree_view(struct tog_view *view)
5277 {
5278 	const struct got_error *err = NULL;
5279 	struct tog_tree_view_state *s = &view->state.tree;
5280 	char *parent_path;
5281 
5282 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5283 	if (err)
5284 		return err;
5285 
5286 	err = draw_tree_entries(view, parent_path);
5287 	free(parent_path);
5288 
5289 	view_vborder(view);
5290 	return err;
5291 }
5292 
5293 static const struct got_error *
5294 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
5295     struct tog_view **focus_view, struct tog_view *view, int ch)
5296 {
5297 	const struct got_error *err = NULL;
5298 	struct tog_tree_view_state *s = &view->state.tree;
5299 	struct tog_view *log_view, *ref_view;
5300 	int begin_x = 0;
5301 
5302 	switch (ch) {
5303 	case 'i':
5304 		s->show_ids = !s->show_ids;
5305 		break;
5306 	case 'l':
5307 		if (!s->selected_entry)
5308 			break;
5309 		if (view_is_parent_view(view))
5310 			begin_x = view_split_begin_x(view->begin_x);
5311 		err = log_tree_entry(&log_view, begin_x, s->selected_entry,
5312 		    &s->parents, s->commit_id, s->repo);
5313 		if (view_is_parent_view(view)) {
5314 			err = view_close_child(view);
5315 			if (err)
5316 				return err;
5317 			err = view_set_child(view, log_view);
5318 			if (err) {
5319 				view_close(log_view);
5320 				break;
5321 			}
5322 			*focus_view = log_view;
5323 			view->child_focussed = 1;
5324 		} else
5325 			*new_view = log_view;
5326 		break;
5327 	case 'r':
5328 		if (view_is_parent_view(view))
5329 			begin_x = view_split_begin_x(view->begin_x);
5330 		ref_view = view_open(view->nlines, view->ncols,
5331 		    view->begin_y, begin_x, TOG_VIEW_REF);
5332 		if (ref_view == NULL)
5333 			return got_error_from_errno("view_open");
5334 		err = open_ref_view(ref_view, s->repo);
5335 		if (err) {
5336 			view_close(ref_view);
5337 			return err;
5338 		}
5339 		if (view_is_parent_view(view)) {
5340 			err = view_close_child(view);
5341 			if (err)
5342 				return err;
5343 			err = view_set_child(view, ref_view);
5344 			if (err) {
5345 				view_close(ref_view);
5346 				break;
5347 			}
5348 			*focus_view = ref_view;
5349 			view->child_focussed = 1;
5350 		} else
5351 			*new_view = ref_view;
5352 		break;
5353 	case 'k':
5354 	case KEY_UP:
5355 		if (s->selected > 0) {
5356 			s->selected--;
5357 			break;
5358 		}
5359 		tree_scroll_up(s, 1);
5360 		break;
5361 	case KEY_PPAGE:
5362 	case CTRL('b'):
5363 		if (s->tree == s->root) {
5364 			if (got_object_tree_get_first_entry(s->tree) ==
5365 			    s->first_displayed_entry)
5366 				s->selected = 0;
5367 		} else {
5368 			if (s->first_displayed_entry == NULL)
5369 				s->selected = 0;
5370 		}
5371 		tree_scroll_up(s, MAX(0, view->nlines - 3));
5372 		break;
5373 	case 'j':
5374 	case KEY_DOWN:
5375 		if (s->selected < s->ndisplayed - 1) {
5376 			s->selected++;
5377 			break;
5378 		}
5379 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5380 		    == NULL)
5381 			/* can't scroll any further */
5382 			break;
5383 		tree_scroll_down(s, 1);
5384 		break;
5385 	case KEY_NPAGE:
5386 	case CTRL('f'):
5387 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5388 		    == NULL) {
5389 			/* can't scroll any further; move cursor down */
5390 			if (s->selected < s->ndisplayed - 1)
5391 				s->selected = s->ndisplayed - 1;
5392 			break;
5393 		}
5394 		tree_scroll_down(s, view->nlines - 3);
5395 		break;
5396 	case KEY_ENTER:
5397 	case '\r':
5398 	case KEY_BACKSPACE:
5399 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5400 			struct tog_parent_tree *parent;
5401 			/* user selected '..' */
5402 			if (s->tree == s->root)
5403 				break;
5404 			parent = TAILQ_FIRST(&s->parents);
5405 			TAILQ_REMOVE(&s->parents, parent,
5406 			    entry);
5407 			got_object_tree_close(s->tree);
5408 			s->tree = parent->tree;
5409 			s->first_displayed_entry =
5410 			    parent->first_displayed_entry;
5411 			s->selected_entry =
5412 			    parent->selected_entry;
5413 			s->selected = parent->selected;
5414 			free(parent);
5415 		} else if (S_ISDIR(got_tree_entry_get_mode(
5416 		    s->selected_entry))) {
5417 			struct got_tree_object *subtree;
5418 			err = got_object_open_as_tree(&subtree, s->repo,
5419 			    got_tree_entry_get_id(s->selected_entry));
5420 			if (err)
5421 				break;
5422 			err = tree_view_visit_subtree(s, subtree);
5423 			if (err) {
5424 				got_object_tree_close(subtree);
5425 				break;
5426 			}
5427 		} else if (S_ISREG(got_tree_entry_get_mode(
5428 		    s->selected_entry))) {
5429 			struct tog_view *blame_view;
5430 			int begin_x = view_is_parent_view(view) ?
5431 			    view_split_begin_x(view->begin_x) : 0;
5432 
5433 			err = blame_tree_entry(&blame_view, begin_x,
5434 			    s->selected_entry, &s->parents,
5435 			    s->commit_id, s->repo);
5436 			if (err)
5437 				break;
5438 			if (view_is_parent_view(view)) {
5439 				err = view_close_child(view);
5440 				if (err)
5441 					return err;
5442 				err = view_set_child(view, blame_view);
5443 				if (err) {
5444 					view_close(blame_view);
5445 					break;
5446 				}
5447 				*focus_view = blame_view;
5448 				view->child_focussed = 1;
5449 			} else
5450 				*new_view = blame_view;
5451 		}
5452 		break;
5453 	case KEY_RESIZE:
5454 		if (s->selected > view->nlines)
5455 			s->selected = s->ndisplayed - 1;
5456 		break;
5457 	default:
5458 		break;
5459 	}
5460 
5461 	return err;
5462 }
5463 
5464 __dead static void
5465 usage_tree(void)
5466 {
5467 	endwin();
5468 	fprintf(stderr, "usage: %s tree [-c commit] [-r repository-path] [path]\n",
5469 	    getprogname());
5470 	exit(1);
5471 }
5472 
5473 static const struct got_error *
5474 cmd_tree(int argc, char *argv[])
5475 {
5476 	const struct got_error *error;
5477 	struct got_repository *repo = NULL;
5478 	struct got_worktree *worktree = NULL;
5479 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5480 	struct got_object_id *commit_id = NULL;
5481 	char *commit_id_arg = NULL;
5482 	struct got_commit_object *commit = NULL;
5483 	struct got_tree_object *tree = NULL;
5484 	int ch;
5485 	struct tog_view *view;
5486 
5487 #ifndef PROFILE
5488 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
5489 	    NULL) == -1)
5490 		err(1, "pledge");
5491 #endif
5492 
5493 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5494 		switch (ch) {
5495 		case 'c':
5496 			commit_id_arg = optarg;
5497 			break;
5498 		case 'r':
5499 			repo_path = realpath(optarg, NULL);
5500 			if (repo_path == NULL)
5501 				return got_error_from_errno2("realpath",
5502 				    optarg);
5503 			break;
5504 		default:
5505 			usage_tree();
5506 			/* NOTREACHED */
5507 		}
5508 	}
5509 
5510 	argc -= optind;
5511 	argv += optind;
5512 
5513 	if (argc > 1)
5514 		usage_tree();
5515 
5516 	cwd = getcwd(NULL, 0);
5517 	if (cwd == NULL)
5518 		return got_error_from_errno("getcwd");
5519 
5520 	error = got_worktree_open(&worktree, cwd);
5521 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
5522 		goto done;
5523 
5524 	if (repo_path == NULL) {
5525 		if (worktree)
5526 			repo_path =
5527 			    strdup(got_worktree_get_repo_path(worktree));
5528 		else
5529 			repo_path = strdup(cwd);
5530 	}
5531 	if (repo_path == NULL) {
5532 		error = got_error_from_errno("strdup");
5533 		goto done;
5534 	}
5535 
5536 	error = got_repo_open(&repo, repo_path, NULL);
5537 	if (error != NULL)
5538 		goto done;
5539 
5540 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
5541 	    repo, worktree);
5542 	if (error)
5543 		goto done;
5544 
5545 	init_curses();
5546 
5547 	error = apply_unveil(got_repo_get_path(repo), NULL);
5548 	if (error)
5549 		goto done;
5550 
5551 	error = got_repo_match_object_id(&commit_id, NULL,
5552 	    commit_id_arg ? commit_id_arg : GOT_REF_HEAD,
5553 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
5554 	if (error)
5555 		goto done;
5556 
5557 	error = got_object_open_as_commit(&commit, repo, commit_id);
5558 	if (error)
5559 		goto done;
5560 
5561 	error = got_object_open_as_tree(&tree, repo,
5562 	    got_object_commit_get_tree_id(commit));
5563 	if (error)
5564 		goto done;
5565 
5566 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
5567 	if (view == NULL) {
5568 		error = got_error_from_errno("view_open");
5569 		goto done;
5570 	}
5571 	error = open_tree_view(view, tree, commit_id, repo);
5572 	if (error)
5573 		goto done;
5574 	if (!got_path_is_root_dir(in_repo_path)) {
5575 		error = tree_view_walk_path(&view->state.tree, commit_id,
5576 		    in_repo_path);
5577 		if (error)
5578 			goto done;
5579 	}
5580 
5581 	if (worktree) {
5582 		/* Release work tree lock. */
5583 		got_worktree_close(worktree);
5584 		worktree = NULL;
5585 	}
5586 	error = view_loop(view);
5587 done:
5588 	free(repo_path);
5589 	free(cwd);
5590 	free(commit_id);
5591 	if (commit)
5592 		got_object_commit_close(commit);
5593 	if (tree)
5594 		got_object_tree_close(tree);
5595 	if (repo)
5596 		got_repo_close(repo);
5597 	return error;
5598 }
5599 
5600 static const struct got_error *
5601 ref_view_load_refs(struct tog_ref_view_state *s)
5602 {
5603 	const struct got_error *err;
5604 	struct got_reflist_entry *sre;
5605 	struct tog_reflist_entry *re;
5606 
5607 	err = got_ref_list(&s->simplerefs, s->repo, NULL,
5608 	    got_ref_cmp_by_name, NULL);
5609 	if (err)
5610 		return err;
5611 
5612 	s->nrefs = 0;
5613 	SIMPLEQ_FOREACH(sre, &s->simplerefs, entry) {
5614 		if (strncmp(got_ref_get_name(sre->ref), "refs/got/", 9) == 0)
5615 			continue;
5616 
5617 		re = malloc(sizeof(*re));
5618 		if (re == NULL)
5619 			return got_error_from_errno("malloc");
5620 
5621 		re->ref = sre->ref;
5622 		re->idx = s->nrefs++;
5623 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
5624 	}
5625 
5626 	return NULL;
5627 }
5628 
5629 void
5630 ref_view_free_refs(struct tog_ref_view_state *s)
5631 {
5632 	struct tog_reflist_entry *re;
5633 
5634 	while (!TAILQ_EMPTY(&s->refs)) {
5635 		re = TAILQ_FIRST(&s->refs);
5636 		TAILQ_REMOVE(&s->refs, re, entry);
5637 		free(re);
5638 	}
5639 	got_ref_list_free(&s->simplerefs);
5640 }
5641 
5642 static const struct got_error *
5643 open_ref_view(struct tog_view *view, struct got_repository *repo)
5644 {
5645 	const struct got_error *err = NULL;
5646 	struct tog_ref_view_state *s = &view->state.ref;
5647 
5648 	s->selected_entry = 0;
5649 	s->repo = repo;
5650 
5651 	SIMPLEQ_INIT(&s->simplerefs);
5652 	TAILQ_INIT(&s->refs);
5653 	SIMPLEQ_INIT(&s->colors);
5654 
5655 	err = ref_view_load_refs(s);
5656 	if (err)
5657 		return err;
5658 
5659 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
5660 
5661 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5662 		err = add_color(&s->colors, "^refs/heads/",
5663 		    TOG_COLOR_REFS_HEADS,
5664 		    get_color_value("TOG_COLOR_REFS_HEADS"));
5665 		if (err)
5666 			goto done;
5667 
5668 		err = add_color(&s->colors, "^refs/tags/",
5669 		    TOG_COLOR_REFS_TAGS,
5670 		    get_color_value("TOG_COLOR_REFS_TAGS"));
5671 		if (err)
5672 			goto done;
5673 
5674 		err = add_color(&s->colors, "^refs/remotes/",
5675 		    TOG_COLOR_REFS_REMOTES,
5676 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
5677 		if (err)
5678 			goto done;
5679 	}
5680 
5681 	view->show = show_ref_view;
5682 	view->input = input_ref_view;
5683 	view->close = close_ref_view;
5684 	view->search_start = search_start_ref_view;
5685 	view->search_next = search_next_ref_view;
5686 done:
5687 	if (err)
5688 		free_colors(&s->colors);
5689 	return err;
5690 }
5691 
5692 static const struct got_error *
5693 close_ref_view(struct tog_view *view)
5694 {
5695 	struct tog_ref_view_state *s = &view->state.ref;
5696 
5697 	ref_view_free_refs(s);
5698 	free_colors(&s->colors);
5699 
5700 	return NULL;
5701 }
5702 
5703 static const struct got_error *
5704 resolve_reflist_entry(struct got_object_id **commit_id,
5705     struct tog_reflist_entry *re, struct got_repository *repo)
5706 {
5707 	const struct got_error *err = NULL;
5708 	struct got_object_id *obj_id;
5709 	struct got_tag_object *tag = NULL;
5710 	int obj_type;
5711 
5712 	*commit_id = NULL;
5713 
5714 	err = got_ref_resolve(&obj_id, repo, re->ref);
5715 	if (err)
5716 		return err;
5717 
5718 	err = got_object_get_type(&obj_type, repo, obj_id);
5719 	if (err)
5720 		goto done;
5721 
5722 	switch (obj_type) {
5723 	case GOT_OBJ_TYPE_COMMIT:
5724 		*commit_id = obj_id;
5725 		break;
5726 	case GOT_OBJ_TYPE_TAG:
5727 		err = got_object_open_as_tag(&tag, repo, obj_id);
5728 		if (err)
5729 			goto done;
5730 		free(obj_id);
5731 		err = got_object_get_type(&obj_type, repo,
5732 		    got_object_tag_get_object_id(tag));
5733 		if (err)
5734 			goto done;
5735 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
5736 			err = got_error(GOT_ERR_OBJ_TYPE);
5737 			goto done;
5738 		}
5739 		*commit_id = got_object_id_dup(
5740 		    got_object_tag_get_object_id(tag));
5741 		if (*commit_id == NULL) {
5742 			err = got_error_from_errno("got_object_id_dup");
5743 			goto done;
5744 		}
5745 		break;
5746 	default:
5747 		err = got_error(GOT_ERR_OBJ_TYPE);
5748 		break;
5749 	}
5750 
5751 done:
5752 	if (tag)
5753 		got_object_tag_close(tag);
5754 	if (err) {
5755 		free(*commit_id);
5756 		*commit_id = NULL;
5757 	}
5758 	return err;
5759 }
5760 
5761 static const struct got_error *
5762 log_ref_entry(struct tog_view **new_view, int begin_x,
5763     struct tog_reflist_entry *re, struct got_repository *repo)
5764 {
5765 	struct tog_view *log_view;
5766 	const struct got_error *err = NULL;
5767 	struct got_object_id *commit_id = NULL;
5768 
5769 	*new_view = NULL;
5770 
5771 	err = resolve_reflist_entry(&commit_id, re, repo);
5772 	if (err) {
5773 		if (err->code != GOT_ERR_OBJ_TYPE)
5774 			return err;
5775 		else
5776 			return NULL;
5777 	}
5778 
5779 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5780 	if (log_view == NULL) {
5781 		err = got_error_from_errno("view_open");
5782 		goto done;
5783 	}
5784 
5785 	err = open_log_view(log_view, commit_id, repo, NULL, "", 0);
5786 done:
5787 	if (err)
5788 		view_close(log_view);
5789 	else
5790 		*new_view = log_view;
5791 	free(commit_id);
5792 	return err;
5793 }
5794 
5795 static void
5796 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
5797 {
5798 	struct tog_reflist_entry *re;
5799 	int i = 0;
5800 
5801 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
5802 		return;
5803 
5804 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
5805 	while (i++ < maxscroll) {
5806 		if (re == NULL)
5807 			break;
5808 		s->first_displayed_entry = re;
5809 		re = TAILQ_PREV(re, tog_reflist_head, entry);
5810 	}
5811 }
5812 
5813 static void
5814 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
5815 {
5816 	struct tog_reflist_entry *next, *last;
5817 	int n = 0;
5818 
5819 	if (s->first_displayed_entry)
5820 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
5821 	else
5822 		next = TAILQ_FIRST(&s->refs);
5823 
5824 	last = s->last_displayed_entry;
5825 	while (next && last && n++ < maxscroll) {
5826 		last = TAILQ_NEXT(last, entry);
5827 		if (last) {
5828 			s->first_displayed_entry = next;
5829 			next = TAILQ_NEXT(next, entry);
5830 		}
5831 	}
5832 }
5833 
5834 static const struct got_error *
5835 search_start_ref_view(struct tog_view *view)
5836 {
5837 	struct tog_ref_view_state *s = &view->state.ref;
5838 
5839 	s->matched_entry = NULL;
5840 	return NULL;
5841 }
5842 
5843 static int
5844 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
5845 {
5846 	regmatch_t regmatch;
5847 
5848 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
5849 	    0) == 0;
5850 }
5851 
5852 static const struct got_error *
5853 search_next_ref_view(struct tog_view *view)
5854 {
5855 	struct tog_ref_view_state *s = &view->state.ref;
5856 	struct tog_reflist_entry *re = NULL;
5857 
5858 	if (!view->searching) {
5859 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5860 		return NULL;
5861 	}
5862 
5863 	if (s->matched_entry) {
5864 		if (view->searching == TOG_SEARCH_FORWARD) {
5865 			if (s->selected_entry)
5866 				re = TAILQ_NEXT(s->selected_entry, entry);
5867 			else
5868 				re = TAILQ_PREV(s->selected_entry,
5869 				    tog_reflist_head, entry);
5870 		} else {
5871 			if (s->selected_entry == NULL)
5872 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5873 			else
5874 				re = TAILQ_PREV(s->selected_entry,
5875 				    tog_reflist_head, entry);
5876 		}
5877 	} else {
5878 		if (view->searching == TOG_SEARCH_FORWARD)
5879 			re = TAILQ_FIRST(&s->refs);
5880 		else
5881 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
5882 	}
5883 
5884 	while (1) {
5885 		if (re == NULL) {
5886 			if (s->matched_entry == NULL) {
5887 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5888 				return NULL;
5889 			}
5890 			if (view->searching == TOG_SEARCH_FORWARD)
5891 				re = TAILQ_FIRST(&s->refs);
5892 			else
5893 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5894 		}
5895 
5896 		if (match_reflist_entry(re, &view->regex)) {
5897 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5898 			s->matched_entry = re;
5899 			break;
5900 		}
5901 
5902 		if (view->searching == TOG_SEARCH_FORWARD)
5903 			re = TAILQ_NEXT(re, entry);
5904 		else
5905 			re = TAILQ_PREV(re, tog_reflist_head, entry);
5906 	}
5907 
5908 	if (s->matched_entry) {
5909 		s->first_displayed_entry = s->matched_entry;
5910 		s->selected = 0;
5911 	}
5912 
5913 	return NULL;
5914 }
5915 
5916 static const struct got_error *
5917 show_ref_view(struct tog_view *view)
5918 {
5919 	const struct got_error *err = NULL;
5920 	struct tog_ref_view_state *s = &view->state.ref;
5921 	struct tog_reflist_entry *re;
5922 	char *line = NULL;
5923 	wchar_t *wline;
5924 	struct tog_color *tc;
5925 	int width, n;
5926 	int limit = view->nlines;
5927 
5928 	werase(view->window);
5929 
5930 	s->ndisplayed = 0;
5931 
5932 	if (limit == 0)
5933 		return NULL;
5934 
5935 	re = s->first_displayed_entry;
5936 
5937 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
5938 	    s->nrefs) == -1)
5939 		return got_error_from_errno("asprintf");
5940 
5941 	err = format_line(&wline, &width, line, view->ncols, 0);
5942 	if (err) {
5943 		free(line);
5944 		return err;
5945 	}
5946 	if (view_needs_focus_indication(view))
5947 		wstandout(view->window);
5948 	waddwstr(view->window, wline);
5949 	if (view_needs_focus_indication(view))
5950 		wstandend(view->window);
5951 	free(wline);
5952 	wline = NULL;
5953 	free(line);
5954 	line = NULL;
5955 	if (width < view->ncols - 1)
5956 		waddch(view->window, '\n');
5957 	if (--limit <= 0)
5958 		return NULL;
5959 
5960 	n = 0;
5961 	while (re && limit > 0) {
5962 		char *line = NULL;
5963 
5964 		if (got_ref_is_symbolic(re->ref)) {
5965 			if (asprintf(&line, "%s -> %s",
5966 			    got_ref_get_name(re->ref),
5967 			    got_ref_get_symref_target(re->ref)) == -1)
5968 				return got_error_from_errno("asprintf");
5969 		} else if (s->show_ids) {
5970 			struct got_object_id *id;
5971 			char *id_str;
5972 			err = got_ref_resolve(&id, s->repo, re->ref);
5973 			if (err)
5974 				return err;
5975 			err = got_object_id_str(&id_str, id);
5976 			if (err) {
5977 				free(id);
5978 				return err;
5979 			}
5980 			if (asprintf(&line, "%s: %s",
5981 			    got_ref_get_name(re->ref), id_str) == -1) {
5982 				err = got_error_from_errno("asprintf");
5983 				free(id);
5984 				free(id_str);
5985 				return err;
5986 			}
5987 			free(id);
5988 			free(id_str);
5989 		} else {
5990 			line = strdup(got_ref_get_name(re->ref));
5991 			if (line == NULL)
5992 				return got_error_from_errno("strdup");
5993 		}
5994 
5995 		err = format_line(&wline, &width, line, view->ncols, 0);
5996 		if (err) {
5997 			free(line);
5998 			return err;
5999 		}
6000 		if (n == s->selected) {
6001 			if (view->focussed)
6002 				wstandout(view->window);
6003 			s->selected_entry = re;
6004 		}
6005 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6006 		if (tc)
6007 			wattr_on(view->window,
6008 			    COLOR_PAIR(tc->colorpair), NULL);
6009 		waddwstr(view->window, wline);
6010 		if (tc)
6011 			wattr_off(view->window,
6012 			    COLOR_PAIR(tc->colorpair), NULL);
6013 		if (width < view->ncols - 1)
6014 			waddch(view->window, '\n');
6015 		if (n == s->selected && view->focussed)
6016 			wstandend(view->window);
6017 		free(line);
6018 		free(wline);
6019 		wline = NULL;
6020 		n++;
6021 		s->ndisplayed++;
6022 		s->last_displayed_entry = re;
6023 
6024 		limit--;
6025 		re = TAILQ_NEXT(re, entry);
6026 	}
6027 
6028 	view_vborder(view);
6029 	return err;
6030 }
6031 
6032 static const struct got_error *
6033 browse_ref_tree(struct tog_view **new_view, int begin_x,
6034     struct tog_reflist_entry *re, struct got_repository *repo)
6035 {
6036 	const struct got_error *err = NULL;
6037 	struct got_object_id *commit_id = NULL, *tree_id = NULL;
6038 	struct got_tree_object *tree = NULL;
6039 	struct tog_view *tree_view;
6040 
6041 	*new_view = NULL;
6042 
6043 	err = resolve_reflist_entry(&commit_id, re, repo);
6044 	if (err) {
6045 		if (err->code != GOT_ERR_OBJ_TYPE)
6046 			return err;
6047 		else
6048 			return NULL;
6049 	}
6050 
6051 	err = got_object_id_by_path(&tree_id, repo, commit_id, "/");
6052 	if (err)
6053 		goto done;
6054 
6055 	err = got_object_open_as_tree(&tree, repo, tree_id);
6056 	if (err)
6057 		goto done;
6058 
6059 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6060 	if (tree_view == NULL) {
6061 		err = got_error_from_errno("view_open");
6062 		goto done;
6063 	}
6064 
6065 	err = open_tree_view(tree_view, tree, commit_id, repo);
6066 	if (err)
6067 		goto done;
6068 
6069 	*new_view = tree_view;
6070 done:
6071 	free(commit_id);
6072 	free(tree_id);
6073 	if (err) {
6074 		if (tree)
6075 			got_object_tree_close(tree);
6076 	}
6077 	return err;
6078 }
6079 static const struct got_error *
6080 input_ref_view(struct tog_view **new_view, struct tog_view **dead_view,
6081     struct tog_view **focus_view, struct tog_view *view, int ch)
6082 {
6083 	const struct got_error *err = NULL;
6084 	struct tog_ref_view_state *s = &view->state.ref;
6085 	struct tog_view *log_view, *tree_view;
6086 	int begin_x = 0;
6087 
6088 	switch (ch) {
6089 	case 'i':
6090 		s->show_ids = !s->show_ids;
6091 		break;
6092 	case KEY_ENTER:
6093 	case '\r':
6094 		if (!s->selected_entry)
6095 			break;
6096 		if (view_is_parent_view(view))
6097 			begin_x = view_split_begin_x(view->begin_x);
6098 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6099 		    s->repo);
6100 		if (view_is_parent_view(view)) {
6101 			err = view_close_child(view);
6102 			if (err)
6103 				return err;
6104 			err = view_set_child(view, log_view);
6105 			if (err) {
6106 				view_close(log_view);
6107 				break;
6108 			}
6109 			*focus_view = log_view;
6110 			view->child_focussed = 1;
6111 		} else
6112 			*new_view = log_view;
6113 		break;
6114 	case 't':
6115 		if (!s->selected_entry)
6116 			break;
6117 		if (view_is_parent_view(view))
6118 			begin_x = view_split_begin_x(view->begin_x);
6119 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6120 		    s->repo);
6121 		if (err || tree_view == NULL)
6122 			break;
6123 		if (view_is_parent_view(view)) {
6124 			err = view_close_child(view);
6125 			if (err)
6126 				return err;
6127 			err = view_set_child(view, tree_view);
6128 			if (err) {
6129 				view_close(tree_view);
6130 				break;
6131 			}
6132 			*focus_view = tree_view;
6133 			view->child_focussed = 1;
6134 		} else
6135 			*new_view = tree_view;
6136 		break;
6137 	case 'k':
6138 	case KEY_UP:
6139 		if (s->selected > 0) {
6140 			s->selected--;
6141 			break;
6142 		}
6143 		ref_scroll_up(s, 1);
6144 		break;
6145 	case KEY_PPAGE:
6146 	case CTRL('b'):
6147 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6148 			s->selected = 0;
6149 		ref_scroll_up(s, MAX(0, view->nlines - 1));
6150 		break;
6151 	case 'j':
6152 	case KEY_DOWN:
6153 		if (s->selected < s->ndisplayed - 1) {
6154 			s->selected++;
6155 			break;
6156 		}
6157 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6158 			/* can't scroll any further */
6159 			break;
6160 		ref_scroll_down(s, 1);
6161 		break;
6162 	case KEY_NPAGE:
6163 	case CTRL('f'):
6164 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6165 			/* can't scroll any further; move cursor down */
6166 			if (s->selected < s->ndisplayed - 1)
6167 				s->selected = s->ndisplayed - 1;
6168 			break;
6169 		}
6170 		ref_scroll_down(s, view->nlines - 1);
6171 		break;
6172 	case CTRL('l'):
6173 		ref_view_free_refs(s);
6174 		err = ref_view_load_refs(s);
6175 		break;
6176 	case KEY_RESIZE:
6177 		if (s->selected > view->nlines)
6178 			s->selected = s->ndisplayed - 1;
6179 		break;
6180 	default:
6181 		break;
6182 	}
6183 
6184 	return err;
6185 }
6186 
6187 __dead static void
6188 usage_ref(void)
6189 {
6190 	endwin();
6191 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6192 	    getprogname());
6193 	exit(1);
6194 }
6195 
6196 static const struct got_error *
6197 cmd_ref(int argc, char *argv[])
6198 {
6199 	const struct got_error *error;
6200 	struct got_repository *repo = NULL;
6201 	struct got_worktree *worktree = NULL;
6202 	char *cwd = NULL, *repo_path = NULL;
6203 	int ch;
6204 	struct tog_view *view;
6205 
6206 #ifndef PROFILE
6207 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
6208 	    NULL) == -1)
6209 		err(1, "pledge");
6210 #endif
6211 
6212 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6213 		switch (ch) {
6214 		case 'r':
6215 			repo_path = realpath(optarg, NULL);
6216 			if (repo_path == NULL)
6217 				return got_error_from_errno2("realpath",
6218 				    optarg);
6219 			break;
6220 		default:
6221 			usage_ref();
6222 			/* NOTREACHED */
6223 		}
6224 	}
6225 
6226 	argc -= optind;
6227 	argv += optind;
6228 
6229 	if (argc > 1)
6230 		usage_ref();
6231 
6232 	cwd = getcwd(NULL, 0);
6233 	if (cwd == NULL)
6234 		return got_error_from_errno("getcwd");
6235 
6236 	error = got_worktree_open(&worktree, cwd);
6237 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6238 		goto done;
6239 
6240 	if (repo_path == NULL) {
6241 		if (worktree)
6242 			repo_path =
6243 			    strdup(got_worktree_get_repo_path(worktree));
6244 		else
6245 			repo_path = strdup(cwd);
6246 	}
6247 	if (repo_path == NULL) {
6248 		error = got_error_from_errno("strdup");
6249 		goto done;
6250 	}
6251 
6252 	error = got_repo_open(&repo, repo_path, NULL);
6253 	if (error != NULL)
6254 		goto done;
6255 
6256 	init_curses();
6257 
6258 	error = apply_unveil(got_repo_get_path(repo), NULL);
6259 	if (error)
6260 		goto done;
6261 
6262 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6263 	if (view == NULL) {
6264 		error = got_error_from_errno("view_open");
6265 		goto done;
6266 	}
6267 
6268 	error = open_ref_view(view, repo);
6269 	if (error)
6270 		goto done;
6271 
6272 	if (worktree) {
6273 		/* Release work tree lock. */
6274 		got_worktree_close(worktree);
6275 		worktree = NULL;
6276 	}
6277 	error = view_loop(view);
6278 done:
6279 	free(repo_path);
6280 	free(cwd);
6281 	if (repo)
6282 		got_repo_close(repo);
6283 	return error;
6284 }
6285 
6286 static void
6287 list_commands(FILE *fp)
6288 {
6289 	int i;
6290 
6291 	fprintf(fp, "commands:");
6292 	for (i = 0; i < nitems(tog_commands); i++) {
6293 		struct tog_cmd *cmd = &tog_commands[i];
6294 		fprintf(fp, " %s", cmd->name);
6295 	}
6296 	fputc('\n', fp);
6297 }
6298 
6299 __dead static void
6300 usage(int hflag, int status)
6301 {
6302 	FILE *fp = (status == 0) ? stdout : stderr;
6303 
6304 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
6305 	    getprogname());
6306 	if (hflag) {
6307 		fprintf(fp, "lazy usage: %s path\n", getprogname());
6308 		list_commands(fp);
6309 	}
6310 	exit(status);
6311 }
6312 
6313 static char **
6314 make_argv(int argc, ...)
6315 {
6316 	va_list ap;
6317 	char **argv;
6318 	int i;
6319 
6320 	va_start(ap, argc);
6321 
6322 	argv = calloc(argc, sizeof(char *));
6323 	if (argv == NULL)
6324 		err(1, "calloc");
6325 	for (i = 0; i < argc; i++) {
6326 		argv[i] = strdup(va_arg(ap, char *));
6327 		if (argv[i] == NULL)
6328 			err(1, "strdup");
6329 	}
6330 
6331 	va_end(ap);
6332 	return argv;
6333 }
6334 
6335 /*
6336  * Try to convert 'tog path' into a 'tog log path' command.
6337  * The user could simply have mistyped the command rather than knowingly
6338  * provided a path. So check whether argv[0] can in fact be resolved
6339  * to a path in the HEAD commit and print a special error if not.
6340  * This hack is for mpi@ <3
6341  */
6342 static const struct got_error *
6343 tog_log_with_path(int argc, char *argv[])
6344 {
6345 	const struct got_error *error = NULL;
6346 	struct tog_cmd *cmd = NULL;
6347 	struct got_repository *repo = NULL;
6348 	struct got_worktree *worktree = NULL;
6349 	struct got_object_id *commit_id = NULL, *id = NULL;
6350 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6351 	char *commit_id_str = NULL, **cmd_argv = NULL;
6352 
6353 	cwd = getcwd(NULL, 0);
6354 	if (cwd == NULL)
6355 		return got_error_from_errno("getcwd");
6356 
6357 	error = got_worktree_open(&worktree, cwd);
6358 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6359 		goto done;
6360 
6361 	if (worktree)
6362 		repo_path = strdup(got_worktree_get_repo_path(worktree));
6363 	else
6364 		repo_path = strdup(cwd);
6365 	if (repo_path == NULL) {
6366 		error = got_error_from_errno("strdup");
6367 		goto done;
6368 	}
6369 
6370 	error = got_repo_open(&repo, repo_path, NULL);
6371 	if (error != NULL)
6372 		goto done;
6373 
6374 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6375 	    repo, worktree);
6376 	if (error)
6377 		goto done;
6378 
6379 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
6380 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
6381 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
6382 	if (error)
6383 		goto done;
6384 
6385 	if (worktree) {
6386 		got_worktree_close(worktree);
6387 		worktree = NULL;
6388 	}
6389 
6390 	error = got_object_id_by_path(&id, repo, commit_id, in_repo_path);
6391 	if (error) {
6392 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
6393 			goto done;
6394 		fprintf(stderr, "%s: '%s' is no known command or path\n",
6395 		    getprogname(), argv[0]);
6396 		usage(1, 1);
6397 		/* not reached */
6398 	}
6399 
6400 	got_repo_close(repo);
6401 	repo = NULL;
6402 
6403 	error = got_object_id_str(&commit_id_str, commit_id);
6404 	if (error)
6405 		goto done;
6406 
6407 	cmd = &tog_commands[0]; /* log */
6408 	argc = 4;
6409 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
6410 	error = cmd->cmd_main(argc, cmd_argv);
6411 done:
6412 	if (repo)
6413 		got_repo_close(repo);
6414 	if (worktree)
6415 		got_worktree_close(worktree);
6416 	free(id);
6417 	free(commit_id_str);
6418 	free(commit_id);
6419 	free(cwd);
6420 	free(repo_path);
6421 	free(in_repo_path);
6422 	if (cmd_argv) {
6423 		int i;
6424 		for (i = 0; i < argc; i++)
6425 			free(cmd_argv[i]);
6426 		free(cmd_argv);
6427 	}
6428 	return error;
6429 }
6430 
6431 int
6432 main(int argc, char *argv[])
6433 {
6434 	const struct got_error *error = NULL;
6435 	struct tog_cmd *cmd = NULL;
6436 	int ch, hflag = 0, Vflag = 0;
6437 	char **cmd_argv = NULL;
6438 	static struct option longopts[] = {
6439 	    { "version", no_argument, NULL, 'V' },
6440 	    { NULL, 0, NULL, 0}
6441 	};
6442 
6443 	setlocale(LC_CTYPE, "");
6444 
6445 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
6446 		switch (ch) {
6447 		case 'h':
6448 			hflag = 1;
6449 			break;
6450 		case 'V':
6451 			Vflag = 1;
6452 			break;
6453 		default:
6454 			usage(hflag, 1);
6455 			/* NOTREACHED */
6456 		}
6457 	}
6458 
6459 	argc -= optind;
6460 	argv += optind;
6461 	optind = 1;
6462 	optreset = 1;
6463 
6464 	if (Vflag) {
6465 		got_version_print_str();
6466 		return 0;
6467 	}
6468 
6469 	if (argc == 0) {
6470 		if (hflag)
6471 			usage(hflag, 0);
6472 		/* Build an argument vector which runs a default command. */
6473 		cmd = &tog_commands[0];
6474 		argc = 1;
6475 		cmd_argv = make_argv(argc, cmd->name);
6476 	} else {
6477 		int i;
6478 
6479 		/* Did the user specify a command? */
6480 		for (i = 0; i < nitems(tog_commands); i++) {
6481 			if (strncmp(tog_commands[i].name, argv[0],
6482 			    strlen(argv[0])) == 0) {
6483 				cmd = &tog_commands[i];
6484 				break;
6485 			}
6486 		}
6487 	}
6488 
6489 	if (cmd == NULL) {
6490 		if (argc != 1)
6491 			usage(0, 1);
6492 		/* No command specified; try log with a path */
6493 		error = tog_log_with_path(argc, argv);
6494 	} else {
6495 		if (hflag)
6496 			cmd->cmd_usage();
6497 		else
6498 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
6499 	}
6500 
6501 	endwin();
6502 	putchar('\n');
6503 	if (cmd_argv) {
6504 		int i;
6505 		for (i = 0; i < argc; i++)
6506 			free(cmd_argv[i]);
6507 		free(cmd_argv);
6508 	}
6509 
6510 	if (error && error->code != GOT_ERR_CANCELLED)
6511 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
6512 	return 0;
6513 }