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