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 /* for ncurses wide-character functions */
24 #include <curses.h>
25 #include <panel.h>
26 #include <locale.h>
27 #include <sha1.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 <limits.h>
37 #include <wchar.h>
38 #include <time.h>
39 #include <pthread.h>
40 #include <libgen.h>
41 #include <regex.h>
42 #include <sched.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 const 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 	STAILQ_ENTRY(tog_color) entry;
124 	regex_t regex;
125 	short colorpair;
126 };
127 STAILQ_HEAD(tog_colors, tog_color);
128 
129 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
130 static struct got_reflist_object_id_map *tog_refs_idmap;
131 
132 static const struct got_error *
133 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
134     struct got_reference* re2)
135 {
136 	const char *name1 = got_ref_get_name(re1);
137 	const char *name2 = got_ref_get_name(re2);
138 	int isbackup1, isbackup2;
139 
140 	/* Sort backup refs towards the bottom of the list. */
141 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
142 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
143 	if (!isbackup1 && isbackup2) {
144 		*cmp = -1;
145 		return NULL;
146 	} else if (isbackup1 && !isbackup2) {
147 		*cmp = 1;
148 		return NULL;
149 	}
150 
151 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
152 	return NULL;
153 }
154 
155 static const struct got_error *
156 tog_load_refs(struct got_repository *repo, int sort_by_date)
157 {
158 	const struct got_error *err;
159 
160 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
161 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
162 	    repo);
163 	if (err)
164 		return err;
165 
166 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
167 	    repo);
168 }
169 
170 static void
171 tog_free_refs(void)
172 {
173 	if (tog_refs_idmap) {
174 		got_reflist_object_id_map_free(tog_refs_idmap);
175 		tog_refs_idmap = NULL;
176 	}
177 	got_ref_list_free(&tog_refs);
178 }
179 
180 static const struct got_error *
181 add_color(struct tog_colors *colors, const char *pattern,
182     int idx, short color)
183 {
184 	const struct got_error *err = NULL;
185 	struct tog_color *tc;
186 	int regerr = 0;
187 
188 	if (idx < 1 || idx > COLOR_PAIRS - 1)
189 		return NULL;
190 
191 	init_pair(idx, color, -1);
192 
193 	tc = calloc(1, sizeof(*tc));
194 	if (tc == NULL)
195 		return got_error_from_errno("calloc");
196 	regerr = regcomp(&tc->regex, pattern,
197 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
198 	if (regerr) {
199 		static char regerr_msg[512];
200 		static char err_msg[512];
201 		regerror(regerr, &tc->regex, regerr_msg,
202 		    sizeof(regerr_msg));
203 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
204 		    regerr_msg);
205 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
206 		free(tc);
207 		return err;
208 	}
209 	tc->colorpair = idx;
210 	STAILQ_INSERT_HEAD(colors, tc, entry);
211 	return NULL;
212 }
213 
214 static void
215 free_colors(struct tog_colors *colors)
216 {
217 	struct tog_color *tc;
218 
219 	while (!STAILQ_EMPTY(colors)) {
220 		tc = STAILQ_FIRST(colors);
221 		STAILQ_REMOVE_HEAD(colors, entry);
222 		regfree(&tc->regex);
223 		free(tc);
224 	}
225 }
226 
227 static struct tog_color *
228 get_color(struct tog_colors *colors, int colorpair)
229 {
230 	struct tog_color *tc = NULL;
231 
232 	STAILQ_FOREACH(tc, colors, entry) {
233 		if (tc->colorpair == colorpair)
234 			return tc;
235 	}
236 
237 	return NULL;
238 }
239 
240 static int
241 default_color_value(const char *envvar)
242 {
243 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
244 		return COLOR_MAGENTA;
245 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
246 		return COLOR_CYAN;
247 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
248 		return COLOR_YELLOW;
249 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
250 		return COLOR_GREEN;
251 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
252 		return COLOR_MAGENTA;
253 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
254 		return COLOR_MAGENTA;
255 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
256 		return COLOR_CYAN;
257 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
258 		return COLOR_GREEN;
259 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
260 		return COLOR_GREEN;
261 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
262 		return COLOR_CYAN;
263 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
264 		return COLOR_YELLOW;
265 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
266 		return COLOR_GREEN;
267 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
268 		return COLOR_MAGENTA;
269 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
270 		return COLOR_YELLOW;
271 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
272 		return COLOR_CYAN;
273 
274 	return -1;
275 }
276 
277 static int
278 get_color_value(const char *envvar)
279 {
280 	const char *val = getenv(envvar);
281 
282 	if (val == NULL)
283 		return default_color_value(envvar);
284 
285 	if (strcasecmp(val, "black") == 0)
286 		return COLOR_BLACK;
287 	if (strcasecmp(val, "red") == 0)
288 		return COLOR_RED;
289 	if (strcasecmp(val, "green") == 0)
290 		return COLOR_GREEN;
291 	if (strcasecmp(val, "yellow") == 0)
292 		return COLOR_YELLOW;
293 	if (strcasecmp(val, "blue") == 0)
294 		return COLOR_BLUE;
295 	if (strcasecmp(val, "magenta") == 0)
296 		return COLOR_MAGENTA;
297 	if (strcasecmp(val, "cyan") == 0)
298 		return COLOR_CYAN;
299 	if (strcasecmp(val, "white") == 0)
300 		return COLOR_WHITE;
301 	if (strcasecmp(val, "default") == 0)
302 		return -1;
303 
304 	return default_color_value(envvar);
305 }
306 
307 
308 struct tog_diff_view_state {
309 	struct got_object_id *id1, *id2;
310 	const char *label1, *label2;
311 	FILE *f, *f1, *f2;
312 	int fd1, fd2;
313 	int first_displayed_line;
314 	int last_displayed_line;
315 	int eof;
316 	int diff_context;
317 	int ignore_whitespace;
318 	int force_text_diff;
319 	struct got_repository *repo;
320 	struct tog_colors colors;
321 	size_t nlines;
322 	off_t *line_offsets;
323 	int matched_line;
324 	int selected_line;
325 
326 	/* passed from log view; may be NULL */
327 	struct tog_view *log_view;
328 };
329 
330 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
331 
332 struct tog_log_thread_args {
333 	pthread_cond_t need_commits;
334 	pthread_cond_t commit_loaded;
335 	int commits_needed;
336 	int load_all;
337 	struct got_commit_graph *graph;
338 	struct commit_queue *commits;
339 	const char *in_repo_path;
340 	struct got_object_id *start_id;
341 	struct got_repository *repo;
342 	int *pack_fds;
343 	int log_complete;
344 	sig_atomic_t *quit;
345 	struct commit_queue_entry **first_displayed_entry;
346 	struct commit_queue_entry **selected_entry;
347 	int *searching;
348 	int *search_next_done;
349 	regex_t *regex;
350 };
351 
352 struct tog_log_view_state {
353 	struct commit_queue commits;
354 	struct commit_queue_entry *first_displayed_entry;
355 	struct commit_queue_entry *last_displayed_entry;
356 	struct commit_queue_entry *selected_entry;
357 	int selected;
358 	char *in_repo_path;
359 	char *head_ref_name;
360 	int log_branches;
361 	struct got_repository *repo;
362 	struct got_object_id *start_id;
363 	sig_atomic_t quit;
364 	pthread_t thread;
365 	struct tog_log_thread_args thread_args;
366 	struct commit_queue_entry *matched_entry;
367 	struct commit_queue_entry *search_entry;
368 	struct tog_colors colors;
369 };
370 
371 #define TOG_COLOR_DIFF_MINUS		1
372 #define TOG_COLOR_DIFF_PLUS		2
373 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
374 #define TOG_COLOR_DIFF_META		4
375 #define TOG_COLOR_TREE_SUBMODULE	5
376 #define TOG_COLOR_TREE_SYMLINK		6
377 #define TOG_COLOR_TREE_DIRECTORY	7
378 #define TOG_COLOR_TREE_EXECUTABLE	8
379 #define TOG_COLOR_COMMIT		9
380 #define TOG_COLOR_AUTHOR		10
381 #define TOG_COLOR_DATE			11
382 #define TOG_COLOR_REFS_HEADS		12
383 #define TOG_COLOR_REFS_TAGS		13
384 #define TOG_COLOR_REFS_REMOTES		14
385 #define TOG_COLOR_REFS_BACKUP		15
386 
387 struct tog_blame_cb_args {
388 	struct tog_blame_line *lines; /* one per line */
389 	int nlines;
390 
391 	struct tog_view *view;
392 	struct got_object_id *commit_id;
393 	int *quit;
394 };
395 
396 struct tog_blame_thread_args {
397 	const char *path;
398 	struct got_repository *repo;
399 	struct tog_blame_cb_args *cb_args;
400 	int *complete;
401 	got_cancel_cb cancel_cb;
402 	void *cancel_arg;
403 };
404 
405 struct tog_blame {
406 	FILE *f;
407 	off_t filesize;
408 	struct tog_blame_line *lines;
409 	int nlines;
410 	off_t *line_offsets;
411 	pthread_t thread;
412 	struct tog_blame_thread_args thread_args;
413 	struct tog_blame_cb_args cb_args;
414 	const char *path;
415 	int *pack_fds;
416 };
417 
418 struct tog_blame_view_state {
419 	int first_displayed_line;
420 	int last_displayed_line;
421 	int selected_line;
422 	int blame_complete;
423 	int eof;
424 	int done;
425 	struct got_object_id_queue blamed_commits;
426 	struct got_object_qid *blamed_commit;
427 	char *path;
428 	struct got_repository *repo;
429 	struct got_object_id *commit_id;
430 	struct tog_blame blame;
431 	int matched_line;
432 	struct tog_colors colors;
433 };
434 
435 struct tog_parent_tree {
436 	TAILQ_ENTRY(tog_parent_tree) entry;
437 	struct got_tree_object *tree;
438 	struct got_tree_entry *first_displayed_entry;
439 	struct got_tree_entry *selected_entry;
440 	int selected;
441 };
442 
443 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
444 
445 struct tog_tree_view_state {
446 	char *tree_label;
447 	struct got_object_id *commit_id;/* commit which this tree belongs to */
448 	struct got_tree_object *root;	/* the commit's root tree entry */
449 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
450 	struct got_tree_entry *first_displayed_entry;
451 	struct got_tree_entry *last_displayed_entry;
452 	struct got_tree_entry *selected_entry;
453 	int ndisplayed, selected, show_ids;
454 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
455 	char *head_ref_name;
456 	struct got_repository *repo;
457 	struct got_tree_entry *matched_entry;
458 	struct tog_colors colors;
459 };
460 
461 struct tog_reflist_entry {
462 	TAILQ_ENTRY(tog_reflist_entry) entry;
463 	struct got_reference *ref;
464 	int idx;
465 };
466 
467 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
468 
469 struct tog_ref_view_state {
470 	struct tog_reflist_head refs;
471 	struct tog_reflist_entry *first_displayed_entry;
472 	struct tog_reflist_entry *last_displayed_entry;
473 	struct tog_reflist_entry *selected_entry;
474 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
475 	struct got_repository *repo;
476 	struct tog_reflist_entry *matched_entry;
477 	struct tog_colors colors;
478 };
479 
480 /*
481  * We implement two types of views: parent views and child views.
482  *
483  * The 'Tab' key switches focus between a parent view and its child view.
484  * Child views are shown side-by-side to their parent view, provided
485  * there is enough screen estate.
486  *
487  * When a new view is opened from within a parent view, this new view
488  * becomes a child view of the parent view, replacing any existing child.
489  *
490  * When a new view is opened from within a child view, this new view
491  * becomes a parent view which will obscure the views below until the
492  * user quits the new parent view by typing 'q'.
493  *
494  * This list of views contains parent views only.
495  * Child views are only pointed to by their parent view.
496  */
497 TAILQ_HEAD(tog_view_list_head, tog_view);
498 
499 struct tog_view {
500 	TAILQ_ENTRY(tog_view) entry;
501 	WINDOW *window;
502 	PANEL *panel;
503 	int nlines, ncols, begin_y, begin_x;
504 	int maxx, x; /* max column and current start column */
505 	int lines, cols; /* copies of LINES and COLS */
506 	int ch, count; /* current keymap and count prefix */
507 	int focussed; /* Only set on one parent or child view at a time. */
508 	int dying;
509 	struct tog_view *parent;
510 	struct tog_view *child;
511 
512 	/*
513 	 * This flag is initially set on parent views when a new child view
514 	 * is created. It gets toggled when the 'Tab' key switches focus
515 	 * between parent and child.
516 	 * The flag indicates whether focus should be passed on to our child
517 	 * view if this parent view gets picked for focus after another parent
518 	 * view was closed. This prevents child views from losing focus in such
519 	 * situations.
520 	 */
521 	int focus_child;
522 
523 	/* type-specific state */
524 	enum tog_view_type type;
525 	union {
526 		struct tog_diff_view_state diff;
527 		struct tog_log_view_state log;
528 		struct tog_blame_view_state blame;
529 		struct tog_tree_view_state tree;
530 		struct tog_ref_view_state ref;
531 	} state;
532 
533 	const struct got_error *(*show)(struct tog_view *);
534 	const struct got_error *(*input)(struct tog_view **,
535 	    struct tog_view *, int);
536 	const struct got_error *(*close)(struct tog_view *);
537 
538 	const struct got_error *(*search_start)(struct tog_view *);
539 	const struct got_error *(*search_next)(struct tog_view *);
540 	int search_started;
541 	int searching;
542 #define TOG_SEARCH_FORWARD	1
543 #define TOG_SEARCH_BACKWARD	2
544 	int search_next_done;
545 #define TOG_SEARCH_HAVE_MORE	1
546 #define TOG_SEARCH_NO_MORE	2
547 #define TOG_SEARCH_HAVE_NONE	3
548 	regex_t regex;
549 	regmatch_t regmatch;
550 };
551 
552 static const struct got_error *open_diff_view(struct tog_view *,
553     struct got_object_id *, struct got_object_id *,
554     const char *, const char *, int, int, int, struct tog_view *,
555     struct got_repository *);
556 static const struct got_error *show_diff_view(struct tog_view *);
557 static const struct got_error *input_diff_view(struct tog_view **,
558     struct tog_view *, int);
559 static const struct got_error* close_diff_view(struct tog_view *);
560 static const struct got_error *search_start_diff_view(struct tog_view *);
561 static const struct got_error *search_next_diff_view(struct tog_view *);
562 
563 static const struct got_error *open_log_view(struct tog_view *,
564     struct got_object_id *, struct got_repository *,
565     const char *, const char *, int);
566 static const struct got_error * show_log_view(struct tog_view *);
567 static const struct got_error *input_log_view(struct tog_view **,
568     struct tog_view *, int);
569 static const struct got_error *close_log_view(struct tog_view *);
570 static const struct got_error *search_start_log_view(struct tog_view *);
571 static const struct got_error *search_next_log_view(struct tog_view *);
572 
573 static const struct got_error *open_blame_view(struct tog_view *, char *,
574     struct got_object_id *, struct got_repository *);
575 static const struct got_error *show_blame_view(struct tog_view *);
576 static const struct got_error *input_blame_view(struct tog_view **,
577     struct tog_view *, int);
578 static const struct got_error *close_blame_view(struct tog_view *);
579 static const struct got_error *search_start_blame_view(struct tog_view *);
580 static const struct got_error *search_next_blame_view(struct tog_view *);
581 
582 static const struct got_error *open_tree_view(struct tog_view *,
583     struct got_object_id *, const char *, struct got_repository *);
584 static const struct got_error *show_tree_view(struct tog_view *);
585 static const struct got_error *input_tree_view(struct tog_view **,
586     struct tog_view *, int);
587 static const struct got_error *close_tree_view(struct tog_view *);
588 static const struct got_error *search_start_tree_view(struct tog_view *);
589 static const struct got_error *search_next_tree_view(struct tog_view *);
590 
591 static const struct got_error *open_ref_view(struct tog_view *,
592     struct got_repository *);
593 static const struct got_error *show_ref_view(struct tog_view *);
594 static const struct got_error *input_ref_view(struct tog_view **,
595     struct tog_view *, int);
596 static const struct got_error *close_ref_view(struct tog_view *);
597 static const struct got_error *search_start_ref_view(struct tog_view *);
598 static const struct got_error *search_next_ref_view(struct tog_view *);
599 
600 static volatile sig_atomic_t tog_sigwinch_received;
601 static volatile sig_atomic_t tog_sigpipe_received;
602 static volatile sig_atomic_t tog_sigcont_received;
603 static volatile sig_atomic_t tog_sigint_received;
604 static volatile sig_atomic_t tog_sigterm_received;
605 
606 static void
607 tog_sigwinch(int signo)
608 {
609 	tog_sigwinch_received = 1;
610 }
611 
612 static void
613 tog_sigpipe(int signo)
614 {
615 	tog_sigpipe_received = 1;
616 }
617 
618 static void
619 tog_sigcont(int signo)
620 {
621 	tog_sigcont_received = 1;
622 }
623 
624 static void
625 tog_sigint(int signo)
626 {
627 	tog_sigint_received = 1;
628 }
629 
630 static void
631 tog_sigterm(int signo)
632 {
633 	tog_sigterm_received = 1;
634 }
635 
636 static int
637 tog_fatal_signal_received(void)
638 {
639 	return (tog_sigpipe_received ||
640 	    tog_sigint_received || tog_sigint_received);
641 }
642 
643 
644 static const struct got_error *
645 view_close(struct tog_view *view)
646 {
647 	const struct got_error *err = NULL;
648 
649 	if (view->child) {
650 		view_close(view->child);
651 		view->child = NULL;
652 	}
653 	if (view->close)
654 		err = view->close(view);
655 	if (view->panel)
656 		del_panel(view->panel);
657 	if (view->window)
658 		delwin(view->window);
659 	free(view);
660 	return err;
661 }
662 
663 static struct tog_view *
664 view_open(int nlines, int ncols, int begin_y, int begin_x,
665     enum tog_view_type type)
666 {
667 	struct tog_view *view = calloc(1, sizeof(*view));
668 
669 	if (view == NULL)
670 		return NULL;
671 
672 	view->ch = 0;
673 	view->count = 0;
674 	view->type = type;
675 	view->lines = LINES;
676 	view->cols = COLS;
677 	view->nlines = nlines ? nlines : LINES - begin_y;
678 	view->ncols = ncols ? ncols : COLS - begin_x;
679 	view->begin_y = begin_y;
680 	view->begin_x = begin_x;
681 	view->window = newwin(nlines, ncols, begin_y, begin_x);
682 	if (view->window == NULL) {
683 		view_close(view);
684 		return NULL;
685 	}
686 	view->panel = new_panel(view->window);
687 	if (view->panel == NULL ||
688 	    set_panel_userptr(view->panel, view) != OK) {
689 		view_close(view);
690 		return NULL;
691 	}
692 
693 	keypad(view->window, TRUE);
694 	return view;
695 }
696 
697 static int
698 view_split_begin_x(int begin_x)
699 {
700 	if (begin_x > 0 || COLS < 120)
701 		return 0;
702 	return (COLS - MAX(COLS / 2, 80));
703 }
704 
705 static const struct got_error *view_resize(struct tog_view *);
706 
707 static const struct got_error *
708 view_splitscreen(struct tog_view *view)
709 {
710 	const struct got_error *err = NULL;
711 
712 	view->begin_y = 0;
713 	view->begin_x = view_split_begin_x(0);
714 	view->nlines = LINES;
715 	view->ncols = COLS - view->begin_x;
716 	view->lines = LINES;
717 	view->cols = COLS;
718 	err = view_resize(view);
719 	if (err)
720 		return err;
721 
722 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
723 		return got_error_from_errno("mvwin");
724 
725 	return NULL;
726 }
727 
728 static const struct got_error *
729 view_fullscreen(struct tog_view *view)
730 {
731 	const struct got_error *err = NULL;
732 
733 	view->begin_x = 0;
734 	view->begin_y = 0;
735 	view->nlines = LINES;
736 	view->ncols = COLS;
737 	view->lines = LINES;
738 	view->cols = COLS;
739 	err = view_resize(view);
740 	if (err)
741 		return err;
742 
743 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
744 		return got_error_from_errno("mvwin");
745 
746 	return NULL;
747 }
748 
749 static int
750 view_is_parent_view(struct tog_view *view)
751 {
752 	return view->parent == NULL;
753 }
754 
755 static int
756 view_is_splitscreen(struct tog_view *view)
757 {
758 	return view->begin_x > 0;
759 }
760 
761 
762 static const struct got_error *
763 view_resize(struct tog_view *view)
764 {
765 	int nlines, ncols;
766 
767 	if (view->lines > LINES)
768 		nlines = view->nlines - (view->lines - LINES);
769 	else
770 		nlines = view->nlines + (LINES - view->lines);
771 
772 	if (view->cols > COLS)
773 		ncols = view->ncols - (view->cols - COLS);
774 	else
775 		ncols = view->ncols + (COLS - view->cols);
776 
777 	if (view->child) {
778 		if (view->child->focussed)
779 			view->child->begin_x = view_split_begin_x(view->begin_x);
780 		if (view->child->begin_x == 0) {
781 			ncols = COLS;
782 
783 			view_fullscreen(view->child);
784 			if (view->child->focussed)
785 				show_panel(view->child->panel);
786 			else
787 				show_panel(view->panel);
788 		} else {
789 			ncols = view->child->begin_x;
790 
791 			view_splitscreen(view->child);
792 			show_panel(view->child->panel);
793 		}
794 	} else if (view->parent == NULL)
795 		ncols = COLS;
796 
797 	if (wresize(view->window, nlines, ncols) == ERR)
798 		return got_error_from_errno("wresize");
799 	if (replace_panel(view->panel, view->window) == ERR)
800 		return got_error_from_errno("replace_panel");
801 	wclear(view->window);
802 
803 	view->nlines = nlines;
804 	view->ncols = ncols;
805 	view->lines = LINES;
806 	view->cols = COLS;
807 
808 	return NULL;
809 }
810 
811 static const struct got_error *
812 view_close_child(struct tog_view *view)
813 {
814 	const struct got_error *err = NULL;
815 
816 	if (view->child == NULL)
817 		return NULL;
818 
819 	err = view_close(view->child);
820 	view->child = NULL;
821 	return err;
822 }
823 
824 static const struct got_error *
825 view_set_child(struct tog_view *view, struct tog_view *child)
826 {
827 	view->child = child;
828 	child->parent = view;
829 
830 	return view_resize(view);
831 }
832 
833 static void
834 tog_resizeterm(void)
835 {
836 	int cols, lines;
837 	struct winsize size;
838 
839 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
840 		cols = 80;     /* Default */
841 		lines = 24;
842 	} else {
843 		cols = size.ws_col;
844 		lines = size.ws_row;
845 	}
846 	resize_term(lines, cols);
847 }
848 
849 static const struct got_error *
850 view_search_start(struct tog_view *view)
851 {
852 	const struct got_error *err = NULL;
853 	char pattern[1024];
854 	int ret;
855 
856 	if (view->search_started) {
857 		regfree(&view->regex);
858 		view->searching = 0;
859 		memset(&view->regmatch, 0, sizeof(view->regmatch));
860 	}
861 	view->search_started = 0;
862 
863 	if (view->nlines < 1)
864 		return NULL;
865 
866 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
867 	wclrtoeol(view->window);
868 
869 	nocbreak();
870 	echo();
871 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
872 	cbreak();
873 	noecho();
874 	if (ret == ERR)
875 		return NULL;
876 
877 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
878 		err = view->search_start(view);
879 		if (err) {
880 			regfree(&view->regex);
881 			return err;
882 		}
883 		view->search_started = 1;
884 		view->searching = TOG_SEARCH_FORWARD;
885 		view->search_next_done = 0;
886 		view->search_next(view);
887 	}
888 
889 	return NULL;
890 }
891 
892 /*
893  * Compute view->count from numeric user input.  User has five-tenths of a
894  * second to follow each numeric keypress with another number to form count.
895  * Return first non-numeric input or ERR and assign total to view->count.
896  * XXX Should we add support for user-defined timeout?
897  */
898 static int
899 get_compound_key(struct tog_view *view, int c)
900 {
901 	int x, n = 0;
902 
903 	view->count = 0;
904 	halfdelay(5);  /* block for half a second */
905 	wattron(view->window, A_BOLD);
906 	wmove(view->window, view->nlines - 1, 0);
907 	wclrtoeol(view->window);
908 	waddch(view->window, ':');
909 
910 	do {
911 		x = getcurx(view->window);
912 		if (x != ERR && x < view->ncols)
913 			waddch(view->window, c);
914 		/*
915 		 * Don't overflow. Max valid request should be the greatest
916 		 * between the longest and total lines; cap at 10 million.
917 		 */
918 		if (n >= 9999999)
919 			n = 9999999;
920 		else
921 			n = n * 10 + (c - '0');
922 	} while (((c = wgetch(view->window))) >= '0' && c <= '9' && c != ERR);
923 
924 	/* Massage excessive or inapplicable values at the input handler. */
925 	view->count = n;
926 
927 	wattroff(view->window, A_BOLD);
928 	cbreak();  /* return to blocking */
929 	return c;
930 }
931 
932 static const struct got_error *
933 view_input(struct tog_view **new, int *done, struct tog_view *view,
934     struct tog_view_list_head *views)
935 {
936 	const struct got_error *err = NULL;
937 	struct tog_view *v;
938 	int ch, errcode;
939 
940 	*new = NULL;
941 
942 	/* Clear "no matches" indicator. */
943 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
944 	    view->search_next_done == TOG_SEARCH_HAVE_NONE) {
945 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
946 		view->count = 0;
947 	}
948 
949 	if (view->searching && !view->search_next_done) {
950 		errcode = pthread_mutex_unlock(&tog_mutex);
951 		if (errcode)
952 			return got_error_set_errno(errcode,
953 			    "pthread_mutex_unlock");
954 		sched_yield();
955 		errcode = pthread_mutex_lock(&tog_mutex);
956 		if (errcode)
957 			return got_error_set_errno(errcode,
958 			    "pthread_mutex_lock");
959 		view->search_next(view);
960 		return NULL;
961 	}
962 
963 	nodelay(stdscr, FALSE);
964 	/* Allow threads to make progress while we are waiting for input. */
965 	errcode = pthread_mutex_unlock(&tog_mutex);
966 	if (errcode)
967 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
968 	/* If we have an unfinished count, don't get a new key map. */
969 	ch = view->ch;
970 	if ((view->count && --view->count == 0) || !view->count) {
971 		ch = wgetch(view->window);
972 		if (ch >= '1' && ch  <= '9')
973 			view->ch = ch = get_compound_key(view, ch);
974 	}
975 	errcode = pthread_mutex_lock(&tog_mutex);
976 	if (errcode)
977 		return got_error_set_errno(errcode, "pthread_mutex_lock");
978 	nodelay(stdscr, TRUE);
979 
980 	if (tog_sigwinch_received || tog_sigcont_received) {
981 		tog_resizeterm();
982 		tog_sigwinch_received = 0;
983 		tog_sigcont_received = 0;
984 		TAILQ_FOREACH(v, views, entry) {
985 			err = view_resize(v);
986 			if (err)
987 				return err;
988 			err = v->input(new, v, KEY_RESIZE);
989 			if (err)
990 				return err;
991 			if (v->child) {
992 				err = view_resize(v->child);
993 				if (err)
994 					return err;
995 				err = v->child->input(new, v->child,
996 				    KEY_RESIZE);
997 				if (err)
998 					return err;
999 			}
1000 		}
1001 	}
1002 
1003 	switch (ch) {
1004 	case '\t':
1005 		view->count = 0;
1006 		if (view->child) {
1007 			view->focussed = 0;
1008 			view->child->focussed = 1;
1009 			view->focus_child = 1;
1010 		} else if (view->parent) {
1011 			view->focussed = 0;
1012 			view->parent->focussed = 1;
1013 			view->parent->focus_child = 0;
1014 			if (!view_is_splitscreen(view))
1015 				err = view_fullscreen(view->parent);
1016 		}
1017 		break;
1018 	case 'q':
1019 		err = view->input(new, view, ch);
1020 		view->dying = 1;
1021 		break;
1022 	case 'Q':
1023 		*done = 1;
1024 		break;
1025 	case 'F':
1026 		view->count = 0;
1027 		if (view_is_parent_view(view)) {
1028 			if (view->child == NULL)
1029 				break;
1030 			if (view_is_splitscreen(view->child)) {
1031 				view->focussed = 0;
1032 				view->child->focussed = 1;
1033 				err = view_fullscreen(view->child);
1034 			} else
1035 				err = view_splitscreen(view->child);
1036 			if (err)
1037 				break;
1038 			err = view->child->input(new, view->child,
1039 			    KEY_RESIZE);
1040 		} else {
1041 			if (view_is_splitscreen(view)) {
1042 				view->parent->focussed = 0;
1043 				view->focussed = 1;
1044 				err = view_fullscreen(view);
1045 			} else {
1046 				err = view_splitscreen(view);
1047 				if (!err)
1048 					err = view_resize(view->parent);
1049 			}
1050 			if (err)
1051 				break;
1052 			err = view->input(new, view, KEY_RESIZE);
1053 		}
1054 		break;
1055 	case KEY_RESIZE:
1056 		break;
1057 	case '/':
1058 		view->count = 0;
1059 		if (view->search_start)
1060 			view_search_start(view);
1061 		else
1062 			err = view->input(new, view, ch);
1063 		break;
1064 	case 'N':
1065 	case 'n':
1066 		if (view->search_started && view->search_next) {
1067 			view->searching = (ch == 'n' ?
1068 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1069 			view->search_next_done = 0;
1070 			view->search_next(view);
1071 		} else
1072 			err = view->input(new, view, ch);
1073 		break;
1074 	default:
1075 		err = view->input(new, view, ch);
1076 		break;
1077 	}
1078 
1079 	return err;
1080 }
1081 
1082 static void
1083 view_vborder(struct tog_view *view)
1084 {
1085 	PANEL *panel;
1086 	const struct tog_view *view_above;
1087 
1088 	if (view->parent)
1089 		return view_vborder(view->parent);
1090 
1091 	panel = panel_above(view->panel);
1092 	if (panel == NULL)
1093 		return;
1094 
1095 	view_above = panel_userptr(panel);
1096 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1097 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
1098 }
1099 
1100 static int
1101 view_needs_focus_indication(struct tog_view *view)
1102 {
1103 	if (view_is_parent_view(view)) {
1104 		if (view->child == NULL || view->child->focussed)
1105 			return 0;
1106 		if (!view_is_splitscreen(view->child))
1107 			return 0;
1108 	} else if (!view_is_splitscreen(view))
1109 		return 0;
1110 
1111 	return view->focussed;
1112 }
1113 
1114 static const struct got_error *
1115 view_loop(struct tog_view *view)
1116 {
1117 	const struct got_error *err = NULL;
1118 	struct tog_view_list_head views;
1119 	struct tog_view *new_view;
1120 	int fast_refresh = 10;
1121 	int done = 0, errcode;
1122 
1123 	errcode = pthread_mutex_lock(&tog_mutex);
1124 	if (errcode)
1125 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1126 
1127 	TAILQ_INIT(&views);
1128 	TAILQ_INSERT_HEAD(&views, view, entry);
1129 
1130 	view->focussed = 1;
1131 	err = view->show(view);
1132 	if (err)
1133 		return err;
1134 	update_panels();
1135 	doupdate();
1136 	while (!TAILQ_EMPTY(&views) && !done && !tog_fatal_signal_received()) {
1137 		/* Refresh fast during initialization, then become slower. */
1138 		if (fast_refresh && fast_refresh-- == 0)
1139 			halfdelay(10); /* switch to once per second */
1140 
1141 		err = view_input(&new_view, &done, view, &views);
1142 		if (err)
1143 			break;
1144 		if (view->dying) {
1145 			struct tog_view *v, *prev = NULL;
1146 
1147 			if (view_is_parent_view(view))
1148 				prev = TAILQ_PREV(view, tog_view_list_head,
1149 				    entry);
1150 			else if (view->parent)
1151 				prev = view->parent;
1152 
1153 			if (view->parent) {
1154 				view->parent->child = NULL;
1155 				view->parent->focus_child = 0;
1156 
1157 				err = view_resize(view->parent);
1158 				if (err)
1159 					break;
1160 			} else
1161 				TAILQ_REMOVE(&views, view, entry);
1162 
1163 			err = view_close(view);
1164 			if (err)
1165 				goto done;
1166 
1167 			view = NULL;
1168 			TAILQ_FOREACH(v, &views, entry) {
1169 				if (v->focussed)
1170 					break;
1171 			}
1172 			if (view == NULL && new_view == NULL) {
1173 				/* No view has focus. Try to pick one. */
1174 				if (prev)
1175 					view = prev;
1176 				else if (!TAILQ_EMPTY(&views)) {
1177 					view = TAILQ_LAST(&views,
1178 					    tog_view_list_head);
1179 				}
1180 				if (view) {
1181 					if (view->focus_child) {
1182 						view->child->focussed = 1;
1183 						view = view->child;
1184 					} else
1185 						view->focussed = 1;
1186 				}
1187 			}
1188 		}
1189 		if (new_view) {
1190 			struct tog_view *v, *t;
1191 			/* Only allow one parent view per type. */
1192 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1193 				if (v->type != new_view->type)
1194 					continue;
1195 				TAILQ_REMOVE(&views, v, entry);
1196 				err = view_close(v);
1197 				if (err)
1198 					goto done;
1199 				break;
1200 			}
1201 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1202 			view = new_view;
1203 		}
1204 		if (view) {
1205 			if (view_is_parent_view(view)) {
1206 				if (view->child && view->child->focussed)
1207 					view = view->child;
1208 			} else {
1209 				if (view->parent && view->parent->focussed)
1210 					view = view->parent;
1211 			}
1212 			show_panel(view->panel);
1213 			if (view->child && view_is_splitscreen(view->child))
1214 				show_panel(view->child->panel);
1215 			if (view->parent && view_is_splitscreen(view)) {
1216 				err = view->parent->show(view->parent);
1217 				if (err)
1218 					goto done;
1219 			}
1220 			err = view->show(view);
1221 			if (err)
1222 				goto done;
1223 			if (view->child) {
1224 				err = view->child->show(view->child);
1225 				if (err)
1226 					goto done;
1227 			}
1228 			update_panels();
1229 			doupdate();
1230 		}
1231 	}
1232 done:
1233 	while (!TAILQ_EMPTY(&views)) {
1234 		view = TAILQ_FIRST(&views);
1235 		TAILQ_REMOVE(&views, view, entry);
1236 		view_close(view);
1237 	}
1238 
1239 	errcode = pthread_mutex_unlock(&tog_mutex);
1240 	if (errcode && err == NULL)
1241 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1242 
1243 	return err;
1244 }
1245 
1246 __dead static void
1247 usage_log(void)
1248 {
1249 	endwin();
1250 	fprintf(stderr,
1251 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1252 	    getprogname());
1253 	exit(1);
1254 }
1255 
1256 /* Create newly allocated wide-character string equivalent to a byte string. */
1257 static const struct got_error *
1258 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1259 {
1260 	char *vis = NULL;
1261 	const struct got_error *err = NULL;
1262 
1263 	*ws = NULL;
1264 	*wlen = mbstowcs(NULL, s, 0);
1265 	if (*wlen == (size_t)-1) {
1266 		int vislen;
1267 		if (errno != EILSEQ)
1268 			return got_error_from_errno("mbstowcs");
1269 
1270 		/* byte string invalid in current encoding; try to "fix" it */
1271 		err = got_mbsavis(&vis, &vislen, s);
1272 		if (err)
1273 			return err;
1274 		*wlen = mbstowcs(NULL, vis, 0);
1275 		if (*wlen == (size_t)-1) {
1276 			err = got_error_from_errno("mbstowcs"); /* give up */
1277 			goto done;
1278 		}
1279 	}
1280 
1281 	*ws = calloc(*wlen + 1, sizeof(**ws));
1282 	if (*ws == NULL) {
1283 		err = got_error_from_errno("calloc");
1284 		goto done;
1285 	}
1286 
1287 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1288 		err = got_error_from_errno("mbstowcs");
1289 done:
1290 	free(vis);
1291 	if (err) {
1292 		free(*ws);
1293 		*ws = NULL;
1294 		*wlen = 0;
1295 	}
1296 	return err;
1297 }
1298 
1299 static const struct got_error *
1300 expand_tab(char **ptr, const char *src)
1301 {
1302 	char	*dst;
1303 	size_t	 len, n, idx = 0, sz = 0;
1304 
1305 	*ptr = NULL;
1306 	n = len = strlen(src);
1307 	dst = malloc(n + 1);
1308 	if (dst == NULL)
1309 		return got_error_from_errno("malloc");
1310 
1311 	while (idx < len && src[idx]) {
1312 		const char c = src[idx];
1313 
1314 		if (c == '\t') {
1315 			size_t nb = TABSIZE - sz % TABSIZE;
1316 			char *p;
1317 
1318 			p = realloc(dst, n + nb);
1319 			if (p == NULL) {
1320 				free(dst);
1321 				return got_error_from_errno("realloc");
1322 
1323 			}
1324 			dst = p;
1325 			n += nb;
1326 			memset(dst + sz, ' ', nb);
1327 			sz += nb;
1328 		} else
1329 			dst[sz++] = src[idx];
1330 		++idx;
1331 	}
1332 
1333 	dst[sz] = '\0';
1334 	*ptr = dst;
1335 	return NULL;
1336 }
1337 
1338 /*
1339  * Advance at most n columns from wline starting at offset off.
1340  * Return the index to the first character after the span operation.
1341  * Return the combined column width of all spanned wide character in
1342  * *rcol.
1343  */
1344 static int
1345 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1346 {
1347 	int width, i, cols = 0;
1348 
1349 	if (n == 0) {
1350 		*rcol = cols;
1351 		return off;
1352 	}
1353 
1354 	for (i = off; wline[i] != L'\0'; ++i) {
1355 		if (wline[i] == L'\t')
1356 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1357 		else
1358 			width = wcwidth(wline[i]);
1359 
1360 		if (width == -1) {
1361 			width = 1;
1362 			wline[i] = L'.';
1363 		}
1364 
1365 		if (cols + width > n)
1366 			break;
1367 		cols += width;
1368 	}
1369 
1370 	*rcol = cols;
1371 	return i;
1372 }
1373 
1374 /*
1375  * Format a line for display, ensuring that it won't overflow a width limit.
1376  * With scrolling, the width returned refers to the scrolled version of the
1377  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1378  */
1379 static const struct got_error *
1380 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1381     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1382 {
1383 	const struct got_error *err = NULL;
1384 	int cols;
1385 	wchar_t *wline = NULL;
1386 	char *exstr = NULL;
1387 	size_t wlen;
1388 	int i, scrollx;
1389 
1390 	*wlinep = NULL;
1391 	*widthp = 0;
1392 
1393 	if (expand) {
1394 		err = expand_tab(&exstr, line);
1395 		if (err)
1396 			return err;
1397 	}
1398 
1399 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1400 	free(exstr);
1401 	if (err)
1402 		return err;
1403 
1404 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1405 
1406 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1407 		wline[wlen - 1] = L'\0';
1408 		wlen--;
1409 	}
1410 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1411 		wline[wlen - 1] = L'\0';
1412 		wlen--;
1413 	}
1414 
1415 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1416 	wline[i] = L'\0';
1417 
1418 	if (widthp)
1419 		*widthp = cols;
1420 	if (scrollxp)
1421 		*scrollxp = scrollx;
1422 	if (err)
1423 		free(wline);
1424 	else
1425 		*wlinep = wline;
1426 	return err;
1427 }
1428 
1429 static const struct got_error*
1430 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1431     struct got_object_id *id, struct got_repository *repo)
1432 {
1433 	static const struct got_error *err = NULL;
1434 	struct got_reflist_entry *re;
1435 	char *s;
1436 	const char *name;
1437 
1438 	*refs_str = NULL;
1439 
1440 	TAILQ_FOREACH(re, refs, entry) {
1441 		struct got_tag_object *tag = NULL;
1442 		struct got_object_id *ref_id;
1443 		int cmp;
1444 
1445 		name = got_ref_get_name(re->ref);
1446 		if (strcmp(name, GOT_REF_HEAD) == 0)
1447 			continue;
1448 		if (strncmp(name, "refs/", 5) == 0)
1449 			name += 5;
1450 		if (strncmp(name, "got/", 4) == 0 &&
1451 		    strncmp(name, "got/backup/", 11) != 0)
1452 			continue;
1453 		if (strncmp(name, "heads/", 6) == 0)
1454 			name += 6;
1455 		if (strncmp(name, "remotes/", 8) == 0) {
1456 			name += 8;
1457 			s = strstr(name, "/" GOT_REF_HEAD);
1458 			if (s != NULL && s[strlen(s)] == '\0')
1459 				continue;
1460 		}
1461 		err = got_ref_resolve(&ref_id, repo, re->ref);
1462 		if (err)
1463 			break;
1464 		if (strncmp(name, "tags/", 5) == 0) {
1465 			err = got_object_open_as_tag(&tag, repo, ref_id);
1466 			if (err) {
1467 				if (err->code != GOT_ERR_OBJ_TYPE) {
1468 					free(ref_id);
1469 					break;
1470 				}
1471 				/* Ref points at something other than a tag. */
1472 				err = NULL;
1473 				tag = NULL;
1474 			}
1475 		}
1476 		cmp = got_object_id_cmp(tag ?
1477 		    got_object_tag_get_object_id(tag) : ref_id, id);
1478 		free(ref_id);
1479 		if (tag)
1480 			got_object_tag_close(tag);
1481 		if (cmp != 0)
1482 			continue;
1483 		s = *refs_str;
1484 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1485 		    s ? ", " : "", name) == -1) {
1486 			err = got_error_from_errno("asprintf");
1487 			free(s);
1488 			*refs_str = NULL;
1489 			break;
1490 		}
1491 		free(s);
1492 	}
1493 
1494 	return err;
1495 }
1496 
1497 static const struct got_error *
1498 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1499     int col_tab_align)
1500 {
1501 	char *smallerthan;
1502 
1503 	smallerthan = strchr(author, '<');
1504 	if (smallerthan && smallerthan[1] != '\0')
1505 		author = smallerthan + 1;
1506 	author[strcspn(author, "@>")] = '\0';
1507 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1508 	    col_tab_align, 0);
1509 }
1510 
1511 static const struct got_error *
1512 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1513     struct got_object_id *id, const size_t date_display_cols,
1514     int author_display_cols)
1515 {
1516 	struct tog_log_view_state *s = &view->state.log;
1517 	const struct got_error *err = NULL;
1518 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1519 	char *logmsg0 = NULL, *logmsg = NULL;
1520 	char *author = NULL;
1521 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1522 	int author_width, logmsg_width;
1523 	char *newline, *line = NULL;
1524 	int col, limit, scrollx;
1525 	const int avail = view->ncols;
1526 	struct tm tm;
1527 	time_t committer_time;
1528 	struct tog_color *tc;
1529 
1530 	committer_time = got_object_commit_get_committer_time(commit);
1531 	if (gmtime_r(&committer_time, &tm) == NULL)
1532 		return got_error_from_errno("gmtime_r");
1533 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1534 		return got_error(GOT_ERR_NO_SPACE);
1535 
1536 	if (avail <= date_display_cols)
1537 		limit = MIN(sizeof(datebuf) - 1, avail);
1538 	else
1539 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1540 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1541 	if (tc)
1542 		wattr_on(view->window,
1543 		    COLOR_PAIR(tc->colorpair), NULL);
1544 	waddnstr(view->window, datebuf, limit);
1545 	if (tc)
1546 		wattr_off(view->window,
1547 		    COLOR_PAIR(tc->colorpair), NULL);
1548 	col = limit;
1549 	if (col > avail)
1550 		goto done;
1551 
1552 	if (avail >= 120) {
1553 		char *id_str;
1554 		err = got_object_id_str(&id_str, id);
1555 		if (err)
1556 			goto done;
1557 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1558 		if (tc)
1559 			wattr_on(view->window,
1560 			    COLOR_PAIR(tc->colorpair), NULL);
1561 		wprintw(view->window, "%.8s ", id_str);
1562 		if (tc)
1563 			wattr_off(view->window,
1564 			    COLOR_PAIR(tc->colorpair), NULL);
1565 		free(id_str);
1566 		col += 9;
1567 		if (col > avail)
1568 			goto done;
1569 	}
1570 
1571 	author = strdup(got_object_commit_get_author(commit));
1572 	if (author == NULL) {
1573 		err = got_error_from_errno("strdup");
1574 		goto done;
1575 	}
1576 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1577 	if (err)
1578 		goto done;
1579 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1580 	if (tc)
1581 		wattr_on(view->window,
1582 		    COLOR_PAIR(tc->colorpair), NULL);
1583 	waddwstr(view->window, wauthor);
1584 	if (tc)
1585 		wattr_off(view->window,
1586 		    COLOR_PAIR(tc->colorpair), NULL);
1587 	col += author_width;
1588 	while (col < avail && author_width < author_display_cols + 2) {
1589 		waddch(view->window, ' ');
1590 		col++;
1591 		author_width++;
1592 	}
1593 	if (col > avail)
1594 		goto done;
1595 
1596 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1597 	if (err)
1598 		goto done;
1599 	logmsg = logmsg0;
1600 	while (*logmsg == '\n')
1601 		logmsg++;
1602 	newline = strchr(logmsg, '\n');
1603 	if (newline)
1604 		*newline = '\0';
1605 	limit = avail - col;
1606 	if (view->child && view_is_splitscreen(view->child) && limit > 0)
1607 		limit--;	/* for the border */
1608 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
1609 	    limit, col, 1);
1610 	if (err)
1611 		goto done;
1612 	waddwstr(view->window, &wlogmsg[scrollx]);
1613 	col += MAX(logmsg_width, 0);
1614 	while (col < avail) {
1615 		waddch(view->window, ' ');
1616 		col++;
1617 	}
1618 done:
1619 	free(logmsg0);
1620 	free(wlogmsg);
1621 	free(author);
1622 	free(wauthor);
1623 	free(line);
1624 	return err;
1625 }
1626 
1627 static struct commit_queue_entry *
1628 alloc_commit_queue_entry(struct got_commit_object *commit,
1629     struct got_object_id *id)
1630 {
1631 	struct commit_queue_entry *entry;
1632 
1633 	entry = calloc(1, sizeof(*entry));
1634 	if (entry == NULL)
1635 		return NULL;
1636 
1637 	entry->id = id;
1638 	entry->commit = commit;
1639 	return entry;
1640 }
1641 
1642 static void
1643 pop_commit(struct commit_queue *commits)
1644 {
1645 	struct commit_queue_entry *entry;
1646 
1647 	entry = TAILQ_FIRST(&commits->head);
1648 	TAILQ_REMOVE(&commits->head, entry, entry);
1649 	got_object_commit_close(entry->commit);
1650 	commits->ncommits--;
1651 	/* Don't free entry->id! It is owned by the commit graph. */
1652 	free(entry);
1653 }
1654 
1655 static void
1656 free_commits(struct commit_queue *commits)
1657 {
1658 	while (!TAILQ_EMPTY(&commits->head))
1659 		pop_commit(commits);
1660 }
1661 
1662 static const struct got_error *
1663 match_commit(int *have_match, struct got_object_id *id,
1664     struct got_commit_object *commit, regex_t *regex)
1665 {
1666 	const struct got_error *err = NULL;
1667 	regmatch_t regmatch;
1668 	char *id_str = NULL, *logmsg = NULL;
1669 
1670 	*have_match = 0;
1671 
1672 	err = got_object_id_str(&id_str, id);
1673 	if (err)
1674 		return err;
1675 
1676 	err = got_object_commit_get_logmsg(&logmsg, commit);
1677 	if (err)
1678 		goto done;
1679 
1680 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1681 	    &regmatch, 0) == 0 ||
1682 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1683 	    &regmatch, 0) == 0 ||
1684 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1685 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1686 		*have_match = 1;
1687 done:
1688 	free(id_str);
1689 	free(logmsg);
1690 	return err;
1691 }
1692 
1693 static const struct got_error *
1694 queue_commits(struct tog_log_thread_args *a)
1695 {
1696 	const struct got_error *err = NULL;
1697 
1698 	/*
1699 	 * We keep all commits open throughout the lifetime of the log
1700 	 * view in order to avoid having to re-fetch commits from disk
1701 	 * while updating the display.
1702 	 */
1703 	do {
1704 		struct got_object_id *id;
1705 		struct got_commit_object *commit;
1706 		struct commit_queue_entry *entry;
1707 		int errcode;
1708 
1709 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1710 		    NULL, NULL);
1711 		if (err || id == NULL)
1712 			break;
1713 
1714 		err = got_object_open_as_commit(&commit, a->repo, id);
1715 		if (err)
1716 			break;
1717 		entry = alloc_commit_queue_entry(commit, id);
1718 		if (entry == NULL) {
1719 			err = got_error_from_errno("alloc_commit_queue_entry");
1720 			break;
1721 		}
1722 
1723 		errcode = pthread_mutex_lock(&tog_mutex);
1724 		if (errcode) {
1725 			err = got_error_set_errno(errcode,
1726 			    "pthread_mutex_lock");
1727 			break;
1728 		}
1729 
1730 		entry->idx = a->commits->ncommits;
1731 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1732 		a->commits->ncommits++;
1733 
1734 		if (*a->searching == TOG_SEARCH_FORWARD &&
1735 		    !*a->search_next_done) {
1736 			int have_match;
1737 			err = match_commit(&have_match, id, commit, a->regex);
1738 			if (err)
1739 				break;
1740 			if (have_match)
1741 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1742 		}
1743 
1744 		errcode = pthread_mutex_unlock(&tog_mutex);
1745 		if (errcode && err == NULL)
1746 			err = got_error_set_errno(errcode,
1747 			    "pthread_mutex_unlock");
1748 		if (err)
1749 			break;
1750 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1751 
1752 	return err;
1753 }
1754 
1755 static void
1756 select_commit(struct tog_log_view_state *s)
1757 {
1758 	struct commit_queue_entry *entry;
1759 	int ncommits = 0;
1760 
1761 	entry = s->first_displayed_entry;
1762 	while (entry) {
1763 		if (ncommits == s->selected) {
1764 			s->selected_entry = entry;
1765 			break;
1766 		}
1767 		entry = TAILQ_NEXT(entry, entry);
1768 		ncommits++;
1769 	}
1770 }
1771 
1772 static const struct got_error *
1773 draw_commits(struct tog_view *view)
1774 {
1775 	const struct got_error *err = NULL;
1776 	struct tog_log_view_state *s = &view->state.log;
1777 	struct commit_queue_entry *entry = s->selected_entry;
1778 	const int limit = view->nlines;
1779 	int width;
1780 	int ncommits, author_cols = 4;
1781 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1782 	char *refs_str = NULL;
1783 	wchar_t *wline;
1784 	struct tog_color *tc;
1785 	static const size_t date_display_cols = 12;
1786 
1787 	if (s->selected_entry &&
1788 	    !(view->searching && view->search_next_done == 0)) {
1789 		struct got_reflist_head *refs;
1790 		err = got_object_id_str(&id_str, s->selected_entry->id);
1791 		if (err)
1792 			return err;
1793 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1794 		    s->selected_entry->id);
1795 		if (refs) {
1796 			err = build_refs_str(&refs_str, refs,
1797 			    s->selected_entry->id, s->repo);
1798 			if (err)
1799 				goto done;
1800 		}
1801 	}
1802 
1803 	if (s->thread_args.commits_needed == 0)
1804 		halfdelay(10); /* disable fast refresh */
1805 
1806 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
1807 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1808 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1809 		    (view->searching && !view->search_next_done) ?
1810 		    "searching..." : "loading...") == -1) {
1811 			err = got_error_from_errno("asprintf");
1812 			goto done;
1813 		}
1814 	} else {
1815 		const char *search_str = NULL;
1816 
1817 		if (view->searching) {
1818 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1819 				search_str = "no more matches";
1820 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1821 				search_str = "no matches found";
1822 			else if (!view->search_next_done)
1823 				search_str = "searching...";
1824 		}
1825 
1826 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1827 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1828 		    search_str ? search_str :
1829 		    (refs_str ? refs_str : "")) == -1) {
1830 			err = got_error_from_errno("asprintf");
1831 			goto done;
1832 		}
1833 	}
1834 
1835 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1836 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
1837 		    "........................................",
1838 		    s->in_repo_path, ncommits_str) == -1) {
1839 			err = got_error_from_errno("asprintf");
1840 			header = NULL;
1841 			goto done;
1842 		}
1843 	} else if (asprintf(&header, "commit %s%s",
1844 	    id_str ? id_str : "........................................",
1845 	    ncommits_str) == -1) {
1846 		err = got_error_from_errno("asprintf");
1847 		header = NULL;
1848 		goto done;
1849 	}
1850 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
1851 	if (err)
1852 		goto done;
1853 
1854 	werase(view->window);
1855 
1856 	if (view_needs_focus_indication(view))
1857 		wstandout(view->window);
1858 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1859 	if (tc)
1860 		wattr_on(view->window,
1861 		    COLOR_PAIR(tc->colorpair), NULL);
1862 	waddwstr(view->window, wline);
1863 	if (tc)
1864 		wattr_off(view->window,
1865 		    COLOR_PAIR(tc->colorpair), NULL);
1866 	while (width < view->ncols) {
1867 		waddch(view->window, ' ');
1868 		width++;
1869 	}
1870 	if (view_needs_focus_indication(view))
1871 		wstandend(view->window);
1872 	free(wline);
1873 	if (limit <= 1)
1874 		goto done;
1875 
1876 	/* Grow author column size if necessary, and set view->maxx. */
1877 	entry = s->first_displayed_entry;
1878 	ncommits = 0;
1879 	view->maxx = 0;
1880 	while (entry) {
1881 		char *author, *eol, *msg, *msg0;
1882 		wchar_t *wauthor, *wmsg;
1883 		int width;
1884 		if (ncommits >= limit - 1)
1885 			break;
1886 		author = strdup(got_object_commit_get_author(entry->commit));
1887 		if (author == NULL) {
1888 			err = got_error_from_errno("strdup");
1889 			goto done;
1890 		}
1891 		err = format_author(&wauthor, &width, author, COLS,
1892 		    date_display_cols);
1893 		if (author_cols < width)
1894 			author_cols = width;
1895 		free(wauthor);
1896 		free(author);
1897 		err = got_object_commit_get_logmsg(&msg0, entry->commit);
1898 		if (err)
1899 			goto done;
1900 		msg = msg0;
1901 		while (*msg == '\n')
1902 			++msg;
1903 		if ((eol = strchr(msg, '\n')))
1904 			*eol = '\0';
1905 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
1906 		    date_display_cols + author_cols, 0);
1907 		if (err)
1908 			goto done;
1909 		view->maxx = MAX(view->maxx, width);
1910 		free(msg0);
1911 		free(wmsg);
1912 		ncommits++;
1913 		entry = TAILQ_NEXT(entry, entry);
1914 	}
1915 
1916 	entry = s->first_displayed_entry;
1917 	s->last_displayed_entry = s->first_displayed_entry;
1918 	ncommits = 0;
1919 	while (entry) {
1920 		if (ncommits >= limit - 1)
1921 			break;
1922 		if (ncommits == s->selected)
1923 			wstandout(view->window);
1924 		err = draw_commit(view, entry->commit, entry->id,
1925 		    date_display_cols, author_cols);
1926 		if (ncommits == s->selected)
1927 			wstandend(view->window);
1928 		if (err)
1929 			goto done;
1930 		ncommits++;
1931 		s->last_displayed_entry = entry;
1932 		entry = TAILQ_NEXT(entry, entry);
1933 	}
1934 
1935 	view_vborder(view);
1936 done:
1937 	free(id_str);
1938 	free(refs_str);
1939 	free(ncommits_str);
1940 	free(header);
1941 	return err;
1942 }
1943 
1944 static void
1945 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1946 {
1947 	struct commit_queue_entry *entry;
1948 	int nscrolled = 0;
1949 
1950 	entry = TAILQ_FIRST(&s->commits.head);
1951 	if (s->first_displayed_entry == entry)
1952 		return;
1953 
1954 	entry = s->first_displayed_entry;
1955 	while (entry && nscrolled < maxscroll) {
1956 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1957 		if (entry) {
1958 			s->first_displayed_entry = entry;
1959 			nscrolled++;
1960 		}
1961 	}
1962 }
1963 
1964 static const struct got_error *
1965 trigger_log_thread(struct tog_view *view, int wait)
1966 {
1967 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1968 	int errcode;
1969 
1970 	halfdelay(1); /* fast refresh while loading commits */
1971 
1972 	while (ta->commits_needed > 0 || ta->load_all) {
1973 		if (ta->log_complete)
1974 			break;
1975 
1976 		/* Wake the log thread. */
1977 		errcode = pthread_cond_signal(&ta->need_commits);
1978 		if (errcode)
1979 			return got_error_set_errno(errcode,
1980 			    "pthread_cond_signal");
1981 
1982 		/*
1983 		 * The mutex will be released while the view loop waits
1984 		 * in wgetch(), at which time the log thread will run.
1985 		 */
1986 		if (!wait)
1987 			break;
1988 
1989 		/* Display progress update in log view. */
1990 		show_log_view(view);
1991 		update_panels();
1992 		doupdate();
1993 
1994 		/* Wait right here while next commit is being loaded. */
1995 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1996 		if (errcode)
1997 			return got_error_set_errno(errcode,
1998 			    "pthread_cond_wait");
1999 
2000 		/* Display progress update in log view. */
2001 		show_log_view(view);
2002 		update_panels();
2003 		doupdate();
2004 	}
2005 
2006 	return NULL;
2007 }
2008 
2009 static const struct got_error *
2010 log_scroll_down(struct tog_view *view, int maxscroll)
2011 {
2012 	struct tog_log_view_state *s = &view->state.log;
2013 	const struct got_error *err = NULL;
2014 	struct commit_queue_entry *pentry;
2015 	int nscrolled = 0, ncommits_needed;
2016 
2017 	if (s->last_displayed_entry == NULL)
2018 		return NULL;
2019 
2020 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
2021 	if (s->commits.ncommits < ncommits_needed &&
2022 	    !s->thread_args.log_complete) {
2023 		/*
2024 		 * Ask the log thread for required amount of commits.
2025 		 */
2026 		s->thread_args.commits_needed += maxscroll;
2027 		err = trigger_log_thread(view, 1);
2028 		if (err)
2029 			return err;
2030 	}
2031 
2032 	do {
2033 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
2034 		if (pentry == NULL)
2035 			break;
2036 
2037 		s->last_displayed_entry = pentry;
2038 
2039 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
2040 		if (pentry == NULL)
2041 			break;
2042 		s->first_displayed_entry = pentry;
2043 	} while (++nscrolled < maxscroll);
2044 
2045 	return err;
2046 }
2047 
2048 static const struct got_error *
2049 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
2050     struct got_commit_object *commit, struct got_object_id *commit_id,
2051     struct tog_view *log_view, struct got_repository *repo)
2052 {
2053 	const struct got_error *err;
2054 	struct got_object_qid *parent_id;
2055 	struct tog_view *diff_view;
2056 
2057 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
2058 	if (diff_view == NULL)
2059 		return got_error_from_errno("view_open");
2060 
2061 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2062 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2063 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2064 	if (err == NULL)
2065 		*new_view = diff_view;
2066 	return err;
2067 }
2068 
2069 static const struct got_error *
2070 tree_view_visit_subtree(struct tog_tree_view_state *s,
2071     struct got_tree_object *subtree)
2072 {
2073 	struct tog_parent_tree *parent;
2074 
2075 	parent = calloc(1, sizeof(*parent));
2076 	if (parent == NULL)
2077 		return got_error_from_errno("calloc");
2078 
2079 	parent->tree = s->tree;
2080 	parent->first_displayed_entry = s->first_displayed_entry;
2081 	parent->selected_entry = s->selected_entry;
2082 	parent->selected = s->selected;
2083 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2084 	s->tree = subtree;
2085 	s->selected = 0;
2086 	s->first_displayed_entry = NULL;
2087 	return NULL;
2088 }
2089 
2090 static const struct got_error *
2091 tree_view_walk_path(struct tog_tree_view_state *s,
2092     struct got_commit_object *commit, const char *path)
2093 {
2094 	const struct got_error *err = NULL;
2095 	struct got_tree_object *tree = NULL;
2096 	const char *p;
2097 	char *slash, *subpath = NULL;
2098 
2099 	/* Walk the path and open corresponding tree objects. */
2100 	p = path;
2101 	while (*p) {
2102 		struct got_tree_entry *te;
2103 		struct got_object_id *tree_id;
2104 		char *te_name;
2105 
2106 		while (p[0] == '/')
2107 			p++;
2108 
2109 		/* Ensure the correct subtree entry is selected. */
2110 		slash = strchr(p, '/');
2111 		if (slash == NULL)
2112 			te_name = strdup(p);
2113 		else
2114 			te_name = strndup(p, slash - p);
2115 		if (te_name == NULL) {
2116 			err = got_error_from_errno("strndup");
2117 			break;
2118 		}
2119 		te = got_object_tree_find_entry(s->tree, te_name);
2120 		if (te == NULL) {
2121 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2122 			free(te_name);
2123 			break;
2124 		}
2125 		free(te_name);
2126 		s->first_displayed_entry = s->selected_entry = te;
2127 
2128 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2129 			break; /* jump to this file's entry */
2130 
2131 		slash = strchr(p, '/');
2132 		if (slash)
2133 			subpath = strndup(path, slash - path);
2134 		else
2135 			subpath = strdup(path);
2136 		if (subpath == NULL) {
2137 			err = got_error_from_errno("strdup");
2138 			break;
2139 		}
2140 
2141 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2142 		    subpath);
2143 		if (err)
2144 			break;
2145 
2146 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2147 		free(tree_id);
2148 		if (err)
2149 			break;
2150 
2151 		err = tree_view_visit_subtree(s, tree);
2152 		if (err) {
2153 			got_object_tree_close(tree);
2154 			break;
2155 		}
2156 		if (slash == NULL)
2157 			break;
2158 		free(subpath);
2159 		subpath = NULL;
2160 		p = slash;
2161 	}
2162 
2163 	free(subpath);
2164 	return err;
2165 }
2166 
2167 static const struct got_error *
2168 browse_commit_tree(struct tog_view **new_view, int begin_x,
2169     struct commit_queue_entry *entry, const char *path,
2170     const char *head_ref_name, struct got_repository *repo)
2171 {
2172 	const struct got_error *err = NULL;
2173 	struct tog_tree_view_state *s;
2174 	struct tog_view *tree_view;
2175 
2176 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
2177 	if (tree_view == NULL)
2178 		return got_error_from_errno("view_open");
2179 
2180 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2181 	if (err)
2182 		return err;
2183 	s = &tree_view->state.tree;
2184 
2185 	*new_view = tree_view;
2186 
2187 	if (got_path_is_root_dir(path))
2188 		return NULL;
2189 
2190 	return tree_view_walk_path(s, entry->commit, path);
2191 }
2192 
2193 static const struct got_error *
2194 block_signals_used_by_main_thread(void)
2195 {
2196 	sigset_t sigset;
2197 	int errcode;
2198 
2199 	if (sigemptyset(&sigset) == -1)
2200 		return got_error_from_errno("sigemptyset");
2201 
2202 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2203 	if (sigaddset(&sigset, SIGWINCH) == -1)
2204 		return got_error_from_errno("sigaddset");
2205 	if (sigaddset(&sigset, SIGCONT) == -1)
2206 		return got_error_from_errno("sigaddset");
2207 	if (sigaddset(&sigset, SIGINT) == -1)
2208 		return got_error_from_errno("sigaddset");
2209 	if (sigaddset(&sigset, SIGTERM) == -1)
2210 		return got_error_from_errno("sigaddset");
2211 
2212 	/* ncurses handles SIGTSTP */
2213 	if (sigaddset(&sigset, SIGTSTP) == -1)
2214 		return got_error_from_errno("sigaddset");
2215 
2216 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2217 	if (errcode)
2218 		return got_error_set_errno(errcode, "pthread_sigmask");
2219 
2220 	return NULL;
2221 }
2222 
2223 static void *
2224 log_thread(void *arg)
2225 {
2226 	const struct got_error *err = NULL;
2227 	int errcode = 0;
2228 	struct tog_log_thread_args *a = arg;
2229 	int done = 0;
2230 
2231 	err = block_signals_used_by_main_thread();
2232 	if (err)
2233 		return (void *)err;
2234 
2235 	while (!done && !err && !tog_fatal_signal_received()) {
2236 		err = queue_commits(a);
2237 		if (err) {
2238 			if (err->code != GOT_ERR_ITER_COMPLETED)
2239 				return (void *)err;
2240 			err = NULL;
2241 			done = 1;
2242 		} else if (a->commits_needed > 0 && !a->load_all)
2243 			a->commits_needed--;
2244 
2245 		errcode = pthread_mutex_lock(&tog_mutex);
2246 		if (errcode) {
2247 			err = got_error_set_errno(errcode,
2248 			    "pthread_mutex_lock");
2249 			break;
2250 		} else if (*a->quit)
2251 			done = 1;
2252 		else if (*a->first_displayed_entry == NULL) {
2253 			*a->first_displayed_entry =
2254 			    TAILQ_FIRST(&a->commits->head);
2255 			*a->selected_entry = *a->first_displayed_entry;
2256 		}
2257 
2258 		errcode = pthread_cond_signal(&a->commit_loaded);
2259 		if (errcode) {
2260 			err = got_error_set_errno(errcode,
2261 			    "pthread_cond_signal");
2262 			pthread_mutex_unlock(&tog_mutex);
2263 			break;
2264 		}
2265 
2266 		if (done)
2267 			a->commits_needed = 0;
2268 		else {
2269 			if (a->commits_needed == 0 && !a->load_all) {
2270 				errcode = pthread_cond_wait(&a->need_commits,
2271 				    &tog_mutex);
2272 				if (errcode)
2273 					err = got_error_set_errno(errcode,
2274 					    "pthread_cond_wait");
2275 				if (*a->quit)
2276 					done = 1;
2277 			}
2278 		}
2279 
2280 		errcode = pthread_mutex_unlock(&tog_mutex);
2281 		if (errcode && err == NULL)
2282 			err = got_error_set_errno(errcode,
2283 			    "pthread_mutex_unlock");
2284 	}
2285 	a->log_complete = 1;
2286 	return (void *)err;
2287 }
2288 
2289 static const struct got_error *
2290 stop_log_thread(struct tog_log_view_state *s)
2291 {
2292 	const struct got_error *err = NULL;
2293 	int errcode;
2294 
2295 	if (s->thread) {
2296 		s->quit = 1;
2297 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2298 		if (errcode)
2299 			return got_error_set_errno(errcode,
2300 			    "pthread_cond_signal");
2301 		errcode = pthread_mutex_unlock(&tog_mutex);
2302 		if (errcode)
2303 			return got_error_set_errno(errcode,
2304 			    "pthread_mutex_unlock");
2305 		errcode = pthread_join(s->thread, (void **)&err);
2306 		if (errcode)
2307 			return got_error_set_errno(errcode, "pthread_join");
2308 		errcode = pthread_mutex_lock(&tog_mutex);
2309 		if (errcode)
2310 			return got_error_set_errno(errcode,
2311 			    "pthread_mutex_lock");
2312 		s->thread = NULL;
2313 	}
2314 
2315 	if (s->thread_args.repo) {
2316 		err = got_repo_close(s->thread_args.repo);
2317 		s->thread_args.repo = NULL;
2318 	}
2319 
2320 	if (s->thread_args.pack_fds) {
2321 		const struct got_error *pack_err =
2322 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2323 		if (err == NULL)
2324 			err = pack_err;
2325 		s->thread_args.pack_fds = NULL;
2326 	}
2327 
2328 	if (s->thread_args.graph) {
2329 		got_commit_graph_close(s->thread_args.graph);
2330 		s->thread_args.graph = NULL;
2331 	}
2332 
2333 	return err;
2334 }
2335 
2336 static const struct got_error *
2337 close_log_view(struct tog_view *view)
2338 {
2339 	const struct got_error *err = NULL;
2340 	struct tog_log_view_state *s = &view->state.log;
2341 	int errcode;
2342 
2343 	err = stop_log_thread(s);
2344 
2345 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2346 	if (errcode && err == NULL)
2347 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2348 
2349 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2350 	if (errcode && err == NULL)
2351 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2352 
2353 	free_commits(&s->commits);
2354 	free(s->in_repo_path);
2355 	s->in_repo_path = NULL;
2356 	free(s->start_id);
2357 	s->start_id = NULL;
2358 	free(s->head_ref_name);
2359 	s->head_ref_name = NULL;
2360 	return err;
2361 }
2362 
2363 static const struct got_error *
2364 search_start_log_view(struct tog_view *view)
2365 {
2366 	struct tog_log_view_state *s = &view->state.log;
2367 
2368 	s->matched_entry = NULL;
2369 	s->search_entry = NULL;
2370 	return NULL;
2371 }
2372 
2373 static const struct got_error *
2374 search_next_log_view(struct tog_view *view)
2375 {
2376 	const struct got_error *err = NULL;
2377 	struct tog_log_view_state *s = &view->state.log;
2378 	struct commit_queue_entry *entry;
2379 
2380 	/* Display progress update in log view. */
2381 	show_log_view(view);
2382 	update_panels();
2383 	doupdate();
2384 
2385 	if (s->search_entry) {
2386 		int errcode, ch;
2387 		errcode = pthread_mutex_unlock(&tog_mutex);
2388 		if (errcode)
2389 			return got_error_set_errno(errcode,
2390 			    "pthread_mutex_unlock");
2391 		ch = wgetch(view->window);
2392 		errcode = pthread_mutex_lock(&tog_mutex);
2393 		if (errcode)
2394 			return got_error_set_errno(errcode,
2395 			    "pthread_mutex_lock");
2396 		if (ch == KEY_BACKSPACE) {
2397 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2398 			return NULL;
2399 		}
2400 		if (view->searching == TOG_SEARCH_FORWARD)
2401 			entry = TAILQ_NEXT(s->search_entry, entry);
2402 		else
2403 			entry = TAILQ_PREV(s->search_entry,
2404 			    commit_queue_head, entry);
2405 	} else if (s->matched_entry) {
2406 		int matched_idx = s->matched_entry->idx;
2407 		int selected_idx = s->selected_entry->idx;
2408 
2409 		/*
2410 		 * If the user has moved the cursor after we hit a match,
2411 		 * the position from where we should continue searching
2412 		 * might have changed.
2413 		 */
2414 		if (view->searching == TOG_SEARCH_FORWARD) {
2415 			if (matched_idx > selected_idx)
2416 				entry = TAILQ_NEXT(s->selected_entry, entry);
2417 			else
2418 				entry = TAILQ_NEXT(s->matched_entry, entry);
2419 		} else {
2420 			if (matched_idx < selected_idx)
2421 				entry = TAILQ_PREV(s->selected_entry,
2422 						commit_queue_head, entry);
2423 			else
2424 				entry = TAILQ_PREV(s->matched_entry,
2425 						commit_queue_head, entry);
2426 		}
2427 	} else {
2428 		entry = s->selected_entry;
2429 	}
2430 
2431 	while (1) {
2432 		int have_match = 0;
2433 
2434 		if (entry == NULL) {
2435 			if (s->thread_args.log_complete ||
2436 			    view->searching == TOG_SEARCH_BACKWARD) {
2437 				view->search_next_done =
2438 				    (s->matched_entry == NULL ?
2439 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2440 				s->search_entry = NULL;
2441 				return NULL;
2442 			}
2443 			/*
2444 			 * Poke the log thread for more commits and return,
2445 			 * allowing the main loop to make progress. Search
2446 			 * will resume at s->search_entry once we come back.
2447 			 */
2448 			s->thread_args.commits_needed++;
2449 			return trigger_log_thread(view, 0);
2450 		}
2451 
2452 		err = match_commit(&have_match, entry->id, entry->commit,
2453 		    &view->regex);
2454 		if (err)
2455 			break;
2456 		if (have_match) {
2457 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2458 			s->matched_entry = entry;
2459 			break;
2460 		}
2461 
2462 		s->search_entry = entry;
2463 		if (view->searching == TOG_SEARCH_FORWARD)
2464 			entry = TAILQ_NEXT(entry, entry);
2465 		else
2466 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2467 	}
2468 
2469 	if (s->matched_entry) {
2470 		int cur = s->selected_entry->idx;
2471 		while (cur < s->matched_entry->idx) {
2472 			err = input_log_view(NULL, view, KEY_DOWN);
2473 			if (err)
2474 				return err;
2475 			cur++;
2476 		}
2477 		while (cur > s->matched_entry->idx) {
2478 			err = input_log_view(NULL, view, KEY_UP);
2479 			if (err)
2480 				return err;
2481 			cur--;
2482 		}
2483 	}
2484 
2485 	s->search_entry = NULL;
2486 
2487 	return NULL;
2488 }
2489 
2490 static const struct got_error *
2491 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2492     struct got_repository *repo, const char *head_ref_name,
2493     const char *in_repo_path, int log_branches)
2494 {
2495 	const struct got_error *err = NULL;
2496 	struct tog_log_view_state *s = &view->state.log;
2497 	struct got_repository *thread_repo = NULL;
2498 	struct got_commit_graph *thread_graph = NULL;
2499 	int errcode;
2500 
2501 	if (in_repo_path != s->in_repo_path) {
2502 		free(s->in_repo_path);
2503 		s->in_repo_path = strdup(in_repo_path);
2504 		if (s->in_repo_path == NULL)
2505 			return got_error_from_errno("strdup");
2506 	}
2507 
2508 	/* The commit queue only contains commits being displayed. */
2509 	TAILQ_INIT(&s->commits.head);
2510 	s->commits.ncommits = 0;
2511 
2512 	s->repo = repo;
2513 	if (head_ref_name) {
2514 		s->head_ref_name = strdup(head_ref_name);
2515 		if (s->head_ref_name == NULL) {
2516 			err = got_error_from_errno("strdup");
2517 			goto done;
2518 		}
2519 	}
2520 	s->start_id = got_object_id_dup(start_id);
2521 	if (s->start_id == NULL) {
2522 		err = got_error_from_errno("got_object_id_dup");
2523 		goto done;
2524 	}
2525 	s->log_branches = log_branches;
2526 
2527 	STAILQ_INIT(&s->colors);
2528 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2529 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2530 		    get_color_value("TOG_COLOR_COMMIT"));
2531 		if (err)
2532 			goto done;
2533 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2534 		    get_color_value("TOG_COLOR_AUTHOR"));
2535 		if (err) {
2536 			free_colors(&s->colors);
2537 			goto done;
2538 		}
2539 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2540 		    get_color_value("TOG_COLOR_DATE"));
2541 		if (err) {
2542 			free_colors(&s->colors);
2543 			goto done;
2544 		}
2545 	}
2546 
2547 	view->show = show_log_view;
2548 	view->input = input_log_view;
2549 	view->close = close_log_view;
2550 	view->search_start = search_start_log_view;
2551 	view->search_next = search_next_log_view;
2552 
2553 	if (s->thread_args.pack_fds == NULL) {
2554 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2555 		if (err)
2556 			goto done;
2557 	}
2558 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2559 	    s->thread_args.pack_fds);
2560 	if (err)
2561 		goto done;
2562 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2563 	    !s->log_branches);
2564 	if (err)
2565 		goto done;
2566 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2567 	    s->repo, NULL, NULL);
2568 	if (err)
2569 		goto done;
2570 
2571 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2572 	if (errcode) {
2573 		err = got_error_set_errno(errcode, "pthread_cond_init");
2574 		goto done;
2575 	}
2576 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2577 	if (errcode) {
2578 		err = got_error_set_errno(errcode, "pthread_cond_init");
2579 		goto done;
2580 	}
2581 
2582 	s->thread_args.commits_needed = view->nlines;
2583 	s->thread_args.graph = thread_graph;
2584 	s->thread_args.commits = &s->commits;
2585 	s->thread_args.in_repo_path = s->in_repo_path;
2586 	s->thread_args.start_id = s->start_id;
2587 	s->thread_args.repo = thread_repo;
2588 	s->thread_args.log_complete = 0;
2589 	s->thread_args.quit = &s->quit;
2590 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2591 	s->thread_args.selected_entry = &s->selected_entry;
2592 	s->thread_args.searching = &view->searching;
2593 	s->thread_args.search_next_done = &view->search_next_done;
2594 	s->thread_args.regex = &view->regex;
2595 done:
2596 	if (err)
2597 		close_log_view(view);
2598 	return err;
2599 }
2600 
2601 static const struct got_error *
2602 show_log_view(struct tog_view *view)
2603 {
2604 	const struct got_error *err;
2605 	struct tog_log_view_state *s = &view->state.log;
2606 
2607 	if (s->thread == NULL) {
2608 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2609 		    &s->thread_args);
2610 		if (errcode)
2611 			return got_error_set_errno(errcode, "pthread_create");
2612 		if (s->thread_args.commits_needed > 0) {
2613 			err = trigger_log_thread(view, 1);
2614 			if (err)
2615 				return err;
2616 		}
2617 	}
2618 
2619 	return draw_commits(view);
2620 }
2621 
2622 static const struct got_error *
2623 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2624 {
2625 	const struct got_error *err = NULL;
2626 	struct tog_log_view_state *s = &view->state.log;
2627 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2628 	struct tog_view *ref_view = NULL;
2629 	struct commit_queue_entry *entry;
2630 	int begin_x = 0, n, nscroll = view->nlines - 1;
2631 
2632 	if (s->thread_args.load_all) {
2633 		if (ch == KEY_BACKSPACE)
2634 			s->thread_args.load_all = 0;
2635 		else if (s->thread_args.log_complete) {
2636 			s->thread_args.load_all = 0;
2637 			log_scroll_down(view, s->commits.ncommits);
2638 			s->selected = MIN(view->nlines - 2,
2639 			    s->commits.ncommits - 1);
2640 			select_commit(s);
2641 		}
2642 		return NULL;
2643 	}
2644 
2645 	switch (ch) {
2646 	case 'q':
2647 		s->quit = 1;
2648 		break;
2649 	case '0':
2650 		view->x = 0;
2651 		break;
2652 	case '$':
2653 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2654 		view->count = 0;
2655 		break;
2656 	case KEY_RIGHT:
2657 	case 'l':
2658 		if (view->x + view->ncols / 2 < view->maxx)
2659 			view->x += 2;  /* move two columns right */
2660 		else
2661 			view->count = 0;
2662 		break;
2663 	case KEY_LEFT:
2664 	case 'h':
2665 		view->x -= MIN(view->x, 2);  /* move two columns back */
2666 		if (view->x <= 0)
2667 			view->count = 0;
2668 		break;
2669 	case 'k':
2670 	case KEY_UP:
2671 	case '<':
2672 	case ',':
2673 	case CTRL('p'):
2674 		if (s->selected_entry->idx == 0)
2675 			view->count = 0;
2676 		if (s->first_displayed_entry == NULL)
2677 			break;
2678 		if (s->selected > 0)
2679 			s->selected--;
2680 		else
2681 			log_scroll_up(s, 1);
2682 		select_commit(s);
2683 		break;
2684 	case 'g':
2685 	case KEY_HOME:
2686 		s->selected = 0;
2687 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2688 		select_commit(s);
2689 		view->count = 0;
2690 		break;
2691 	case CTRL('u'):
2692 	case 'u':
2693 		nscroll /= 2;
2694 		/* FALL THROUGH */
2695 	case KEY_PPAGE:
2696 	case CTRL('b'):
2697 	case 'b':
2698 		if (s->first_displayed_entry == NULL)
2699 			break;
2700 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2701 			s->selected = MAX(0, s->selected - nscroll - 1);
2702 		else
2703 			log_scroll_up(s, nscroll);
2704 		select_commit(s);
2705 		if (s->selected_entry->idx == 0)
2706 			view->count = 0;
2707 		break;
2708 	case 'j':
2709 	case KEY_DOWN:
2710 	case '>':
2711 	case '.':
2712 	case CTRL('n'):
2713 		if (s->first_displayed_entry == NULL)
2714 			break;
2715 		if (s->selected < MIN(view->nlines - 2,
2716 		    s->commits.ncommits - 1))
2717 			s->selected++;
2718 		else {
2719 			err = log_scroll_down(view, 1);
2720 			if (err)
2721 				break;
2722 		}
2723 		select_commit(s);
2724 		if (s->thread_args.log_complete &&
2725 		    s->selected_entry->idx == s->commits.ncommits - 1)
2726 			view->count = 0;
2727 		break;
2728 	case 'G':
2729 	case KEY_END: {
2730 		/* We don't know yet how many commits, so we're forced to
2731 		 * traverse them all. */
2732 		view->count = 0;
2733 		if (!s->thread_args.log_complete) {
2734 			s->thread_args.load_all = 1;
2735 			return trigger_log_thread(view, 0);
2736 		}
2737 
2738 		s->selected = 0;
2739 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2740 		for (n = 0; n < view->nlines - 1; n++) {
2741 			if (entry == NULL)
2742 				break;
2743 			s->first_displayed_entry = entry;
2744 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2745 		}
2746 		if (n > 0)
2747 			s->selected = n - 1;
2748 		select_commit(s);
2749 		break;
2750 	}
2751 	case CTRL('d'):
2752 	case 'd':
2753 		nscroll /= 2;
2754 		/* FALL THROUGH */
2755 	case KEY_NPAGE:
2756 	case CTRL('f'):
2757 	case 'f':
2758 	case ' ': {
2759 		struct commit_queue_entry *first;
2760 		first = s->first_displayed_entry;
2761 		if (first == NULL) {
2762 			view->count = 0;
2763 			break;
2764 		}
2765 		err = log_scroll_down(view, nscroll);
2766 		if (err)
2767 			break;
2768 		if (first == s->first_displayed_entry &&
2769 		    s->selected < MIN(view->nlines - 2,
2770 		    s->commits.ncommits - 1)) {
2771 			/* can't scroll further down */
2772 			s->selected += MIN(s->last_displayed_entry->idx -
2773 			    s->selected_entry->idx, nscroll + 1);
2774 		}
2775 		select_commit(s);
2776 		if (s->thread_args.log_complete &&
2777 		    s->selected_entry->idx == s->commits.ncommits - 1)
2778 			view->count = 0;
2779 		break;
2780 	}
2781 	case KEY_RESIZE:
2782 		if (s->selected > view->nlines - 2)
2783 			s->selected = view->nlines - 2;
2784 		if (s->selected > s->commits.ncommits - 1)
2785 			s->selected = s->commits.ncommits - 1;
2786 		select_commit(s);
2787 		if (s->commits.ncommits < view->nlines - 1 &&
2788 		    !s->thread_args.log_complete) {
2789 			s->thread_args.commits_needed += (view->nlines - 1) -
2790 			    s->commits.ncommits;
2791 			err = trigger_log_thread(view, 1);
2792 		}
2793 		break;
2794 	case KEY_ENTER:
2795 	case '\r':
2796 		view->count = 0;
2797 		if (s->selected_entry == NULL)
2798 			break;
2799 		if (view_is_parent_view(view))
2800 			begin_x = view_split_begin_x(view->begin_x);
2801 		err = open_diff_view_for_commit(&diff_view, begin_x,
2802 		    s->selected_entry->commit, s->selected_entry->id,
2803 		    view, s->repo);
2804 		if (err)
2805 			break;
2806 		view->focussed = 0;
2807 		diff_view->focussed = 1;
2808 		if (view_is_parent_view(view)) {
2809 			err = view_close_child(view);
2810 			if (err)
2811 				return err;
2812 			err = view_set_child(view, diff_view);
2813 			if (err)
2814 				return err;
2815 			view->focus_child = 1;
2816 		} else
2817 			*new_view = diff_view;
2818 		break;
2819 	case 't':
2820 		view->count = 0;
2821 		if (s->selected_entry == NULL)
2822 			break;
2823 		if (view_is_parent_view(view))
2824 			begin_x = view_split_begin_x(view->begin_x);
2825 		err = browse_commit_tree(&tree_view, begin_x,
2826 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2827 		    s->repo);
2828 		if (err)
2829 			break;
2830 		view->focussed = 0;
2831 		tree_view->focussed = 1;
2832 		if (view_is_parent_view(view)) {
2833 			err = view_close_child(view);
2834 			if (err)
2835 				return err;
2836 			err = view_set_child(view, tree_view);
2837 			if (err)
2838 				return err;
2839 			view->focus_child = 1;
2840 		} else
2841 			*new_view = tree_view;
2842 		break;
2843 	case KEY_BACKSPACE:
2844 	case CTRL('l'):
2845 	case 'B':
2846 		view->count = 0;
2847 		if (ch == KEY_BACKSPACE &&
2848 		    got_path_is_root_dir(s->in_repo_path))
2849 			break;
2850 		err = stop_log_thread(s);
2851 		if (err)
2852 			return err;
2853 		if (ch == KEY_BACKSPACE) {
2854 			char *parent_path;
2855 			err = got_path_dirname(&parent_path, s->in_repo_path);
2856 			if (err)
2857 				return err;
2858 			free(s->in_repo_path);
2859 			s->in_repo_path = parent_path;
2860 			s->thread_args.in_repo_path = s->in_repo_path;
2861 		} else if (ch == CTRL('l')) {
2862 			struct got_object_id *start_id;
2863 			err = got_repo_match_object_id(&start_id, NULL,
2864 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2865 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2866 			if (err)
2867 				return err;
2868 			free(s->start_id);
2869 			s->start_id = start_id;
2870 			s->thread_args.start_id = s->start_id;
2871 		} else /* 'B' */
2872 			s->log_branches = !s->log_branches;
2873 
2874 		if (s->thread_args.pack_fds == NULL) {
2875 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2876 			if (err)
2877 				return err;
2878 		}
2879 		err = got_repo_open(&s->thread_args.repo,
2880 		    got_repo_get_path(s->repo), NULL,
2881 		    s->thread_args.pack_fds);
2882 		if (err)
2883 			return err;
2884 		tog_free_refs();
2885 		err = tog_load_refs(s->repo, 0);
2886 		if (err)
2887 			return err;
2888 		err = got_commit_graph_open(&s->thread_args.graph,
2889 		    s->in_repo_path, !s->log_branches);
2890 		if (err)
2891 			return err;
2892 		err = got_commit_graph_iter_start(s->thread_args.graph,
2893 		    s->start_id, s->repo, NULL, NULL);
2894 		if (err)
2895 			return err;
2896 		free_commits(&s->commits);
2897 		s->first_displayed_entry = NULL;
2898 		s->last_displayed_entry = NULL;
2899 		s->selected_entry = NULL;
2900 		s->selected = 0;
2901 		s->thread_args.log_complete = 0;
2902 		s->quit = 0;
2903 		s->thread_args.commits_needed = view->nlines;
2904 		s->matched_entry = NULL;
2905 		s->search_entry = NULL;
2906 		break;
2907 	case 'r':
2908 		view->count = 0;
2909 		if (view_is_parent_view(view))
2910 			begin_x = view_split_begin_x(view->begin_x);
2911 		ref_view = view_open(view->nlines, view->ncols,
2912 		    view->begin_y, begin_x, TOG_VIEW_REF);
2913 		if (ref_view == NULL)
2914 			return got_error_from_errno("view_open");
2915 		err = open_ref_view(ref_view, s->repo);
2916 		if (err) {
2917 			view_close(ref_view);
2918 			return err;
2919 		}
2920 		view->focussed = 0;
2921 		ref_view->focussed = 1;
2922 		if (view_is_parent_view(view)) {
2923 			err = view_close_child(view);
2924 			if (err)
2925 				return err;
2926 			err = view_set_child(view, ref_view);
2927 			if (err)
2928 				return err;
2929 			view->focus_child = 1;
2930 		} else
2931 			*new_view = ref_view;
2932 		break;
2933 	default:
2934 		view->count = 0;
2935 		break;
2936 	}
2937 
2938 	return err;
2939 }
2940 
2941 static const struct got_error *
2942 apply_unveil(const char *repo_path, const char *worktree_path)
2943 {
2944 	const struct got_error *error;
2945 
2946 #ifdef PROFILE
2947 	if (unveil("gmon.out", "rwc") != 0)
2948 		return got_error_from_errno2("unveil", "gmon.out");
2949 #endif
2950 	if (repo_path && unveil(repo_path, "r") != 0)
2951 		return got_error_from_errno2("unveil", repo_path);
2952 
2953 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2954 		return got_error_from_errno2("unveil", worktree_path);
2955 
2956 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2957 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2958 
2959 	error = got_privsep_unveil_exec_helpers();
2960 	if (error != NULL)
2961 		return error;
2962 
2963 	if (unveil(NULL, NULL) != 0)
2964 		return got_error_from_errno("unveil");
2965 
2966 	return NULL;
2967 }
2968 
2969 static void
2970 init_curses(void)
2971 {
2972 	/*
2973 	 * Override default signal handlers before starting ncurses.
2974 	 * This should prevent ncurses from installing its own
2975 	 * broken cleanup() signal handler.
2976 	 */
2977 	signal(SIGWINCH, tog_sigwinch);
2978 	signal(SIGPIPE, tog_sigpipe);
2979 	signal(SIGCONT, tog_sigcont);
2980 	signal(SIGINT, tog_sigint);
2981 	signal(SIGTERM, tog_sigterm);
2982 
2983 	initscr();
2984 	cbreak();
2985 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2986 	noecho();
2987 	nonl();
2988 	intrflush(stdscr, FALSE);
2989 	keypad(stdscr, TRUE);
2990 	curs_set(0);
2991 	if (getenv("TOG_COLORS") != NULL) {
2992 		start_color();
2993 		use_default_colors();
2994 	}
2995 }
2996 
2997 static const struct got_error *
2998 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2999     struct got_repository *repo, struct got_worktree *worktree)
3000 {
3001 	const struct got_error *err = NULL;
3002 
3003 	if (argc == 0) {
3004 		*in_repo_path = strdup("/");
3005 		if (*in_repo_path == NULL)
3006 			return got_error_from_errno("strdup");
3007 		return NULL;
3008 	}
3009 
3010 	if (worktree) {
3011 		const char *prefix = got_worktree_get_path_prefix(worktree);
3012 		char *p;
3013 
3014 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3015 		if (err)
3016 			return err;
3017 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3018 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3019 		    p) == -1) {
3020 			err = got_error_from_errno("asprintf");
3021 			*in_repo_path = NULL;
3022 		}
3023 		free(p);
3024 	} else
3025 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3026 
3027 	return err;
3028 }
3029 
3030 static const struct got_error *
3031 cmd_log(int argc, char *argv[])
3032 {
3033 	const struct got_error *error;
3034 	struct got_repository *repo = NULL;
3035 	struct got_worktree *worktree = NULL;
3036 	struct got_object_id *start_id = NULL;
3037 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3038 	char *start_commit = NULL, *label = NULL;
3039 	struct got_reference *ref = NULL;
3040 	const char *head_ref_name = NULL;
3041 	int ch, log_branches = 0;
3042 	struct tog_view *view;
3043 	int *pack_fds = NULL;
3044 
3045 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3046 		switch (ch) {
3047 		case 'b':
3048 			log_branches = 1;
3049 			break;
3050 		case 'c':
3051 			start_commit = optarg;
3052 			break;
3053 		case 'r':
3054 			repo_path = realpath(optarg, NULL);
3055 			if (repo_path == NULL)
3056 				return got_error_from_errno2("realpath",
3057 				    optarg);
3058 			break;
3059 		default:
3060 			usage_log();
3061 			/* NOTREACHED */
3062 		}
3063 	}
3064 
3065 	argc -= optind;
3066 	argv += optind;
3067 
3068 	if (argc > 1)
3069 		usage_log();
3070 
3071 	error = got_repo_pack_fds_open(&pack_fds);
3072 	if (error != NULL)
3073 		goto done;
3074 
3075 	if (repo_path == NULL) {
3076 		cwd = getcwd(NULL, 0);
3077 		if (cwd == NULL)
3078 			return got_error_from_errno("getcwd");
3079 		error = got_worktree_open(&worktree, cwd);
3080 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3081 			goto done;
3082 		if (worktree)
3083 			repo_path =
3084 			    strdup(got_worktree_get_repo_path(worktree));
3085 		else
3086 			repo_path = strdup(cwd);
3087 		if (repo_path == NULL) {
3088 			error = got_error_from_errno("strdup");
3089 			goto done;
3090 		}
3091 	}
3092 
3093 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3094 	if (error != NULL)
3095 		goto done;
3096 
3097 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3098 	    repo, worktree);
3099 	if (error)
3100 		goto done;
3101 
3102 	init_curses();
3103 
3104 	error = apply_unveil(got_repo_get_path(repo),
3105 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3106 	if (error)
3107 		goto done;
3108 
3109 	/* already loaded by tog_log_with_path()? */
3110 	if (TAILQ_EMPTY(&tog_refs)) {
3111 		error = tog_load_refs(repo, 0);
3112 		if (error)
3113 			goto done;
3114 	}
3115 
3116 	if (start_commit == NULL) {
3117 		error = got_repo_match_object_id(&start_id, &label,
3118 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3119 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3120 		if (error)
3121 			goto done;
3122 		head_ref_name = label;
3123 	} else {
3124 		error = got_ref_open(&ref, repo, start_commit, 0);
3125 		if (error == NULL)
3126 			head_ref_name = got_ref_get_name(ref);
3127 		else if (error->code != GOT_ERR_NOT_REF)
3128 			goto done;
3129 		error = got_repo_match_object_id(&start_id, NULL,
3130 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3131 		if (error)
3132 			goto done;
3133 	}
3134 
3135 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3136 	if (view == NULL) {
3137 		error = got_error_from_errno("view_open");
3138 		goto done;
3139 	}
3140 	error = open_log_view(view, start_id, repo, head_ref_name,
3141 	    in_repo_path, log_branches);
3142 	if (error)
3143 		goto done;
3144 	if (worktree) {
3145 		/* Release work tree lock. */
3146 		got_worktree_close(worktree);
3147 		worktree = NULL;
3148 	}
3149 	error = view_loop(view);
3150 done:
3151 	free(in_repo_path);
3152 	free(repo_path);
3153 	free(cwd);
3154 	free(start_id);
3155 	free(label);
3156 	if (ref)
3157 		got_ref_close(ref);
3158 	if (repo) {
3159 		const struct got_error *close_err = got_repo_close(repo);
3160 		if (error == NULL)
3161 			error = close_err;
3162 	}
3163 	if (worktree)
3164 		got_worktree_close(worktree);
3165 	if (pack_fds) {
3166 		const struct got_error *pack_err =
3167 		    got_repo_pack_fds_close(pack_fds);
3168 		if (error == NULL)
3169 			error = pack_err;
3170 	}
3171 	tog_free_refs();
3172 	return error;
3173 }
3174 
3175 __dead static void
3176 usage_diff(void)
3177 {
3178 	endwin();
3179 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3180 	    "[-w] object1 object2\n", getprogname());
3181 	exit(1);
3182 }
3183 
3184 static int
3185 match_line(const char *line, regex_t *regex, size_t nmatch,
3186     regmatch_t *regmatch)
3187 {
3188 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3189 }
3190 
3191 static struct tog_color *
3192 match_color(struct tog_colors *colors, const char *line)
3193 {
3194 	struct tog_color *tc = NULL;
3195 
3196 	STAILQ_FOREACH(tc, colors, entry) {
3197 		if (match_line(line, &tc->regex, 0, NULL))
3198 			return tc;
3199 	}
3200 
3201 	return NULL;
3202 }
3203 
3204 static const struct got_error *
3205 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3206     WINDOW *window, int skipcol, regmatch_t *regmatch)
3207 {
3208 	const struct got_error *err = NULL;
3209 	char *exstr = NULL;
3210 	wchar_t *wline = NULL;
3211 	int rme, rms, n, width, scrollx;
3212 	int width0 = 0, width1 = 0, width2 = 0;
3213 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3214 
3215 	*wtotal = 0;
3216 
3217 	rms = regmatch->rm_so;
3218 	rme = regmatch->rm_eo;
3219 
3220 	err = expand_tab(&exstr, line);
3221 	if (err)
3222 		return err;
3223 
3224 	/* Split the line into 3 segments, according to match offsets. */
3225 	seg0 = strndup(exstr, rms);
3226 	if (seg0 == NULL) {
3227 		err = got_error_from_errno("strndup");
3228 		goto done;
3229 	}
3230 	seg1 = strndup(exstr + rms, rme - rms);
3231 	if (seg1 == NULL) {
3232 		err = got_error_from_errno("strndup");
3233 		goto done;
3234 	}
3235 	seg2 = strdup(exstr + rme);
3236 	if (seg2 == NULL) {
3237 		err = got_error_from_errno("strndup");
3238 		goto done;
3239 	}
3240 
3241 	/* draw up to matched token if we haven't scrolled past it */
3242 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3243 	    col_tab_align, 1);
3244 	if (err)
3245 		goto done;
3246 	n = MAX(width0 - skipcol, 0);
3247 	if (n) {
3248 		free(wline);
3249 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3250 		    wlimit, col_tab_align, 1);
3251 		if (err)
3252 			goto done;
3253 		waddwstr(window, &wline[scrollx]);
3254 		wlimit -= width;
3255 		*wtotal += width;
3256 	}
3257 
3258 	if (wlimit > 0) {
3259 		int i = 0, w = 0;
3260 		size_t wlen;
3261 
3262 		free(wline);
3263 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3264 		    col_tab_align, 1);
3265 		if (err)
3266 			goto done;
3267 		wlen = wcslen(wline);
3268 		while (i < wlen) {
3269 			width = wcwidth(wline[i]);
3270 			if (width == -1) {
3271 				/* should not happen, tabs are expanded */
3272 				err = got_error(GOT_ERR_RANGE);
3273 				goto done;
3274 			}
3275 			if (width0 + w + width > skipcol)
3276 				break;
3277 			w += width;
3278 			i++;
3279 		}
3280 		/* draw (visible part of) matched token (if scrolled into it) */
3281 		if (width1 - w > 0) {
3282 			wattron(window, A_STANDOUT);
3283 			waddwstr(window, &wline[i]);
3284 			wattroff(window, A_STANDOUT);
3285 			wlimit -= (width1 - w);
3286 			*wtotal += (width1 - w);
3287 		}
3288 	}
3289 
3290 	if (wlimit > 0) {  /* draw rest of line */
3291 		free(wline);
3292 		if (skipcol > width0 + width1) {
3293 			err = format_line(&wline, &width2, &scrollx, seg2,
3294 			    skipcol - (width0 + width1), wlimit,
3295 			    col_tab_align, 1);
3296 			if (err)
3297 				goto done;
3298 			waddwstr(window, &wline[scrollx]);
3299 		} else {
3300 			err = format_line(&wline, &width2, NULL, seg2, 0,
3301 			    wlimit, col_tab_align, 1);
3302 			if (err)
3303 				goto done;
3304 			waddwstr(window, wline);
3305 		}
3306 		*wtotal += width2;
3307 	}
3308 done:
3309 	free(wline);
3310 	free(exstr);
3311 	free(seg0);
3312 	free(seg1);
3313 	free(seg2);
3314 	return err;
3315 }
3316 
3317 static const struct got_error *
3318 draw_file(struct tog_view *view, const char *header)
3319 {
3320 	struct tog_diff_view_state *s = &view->state.diff;
3321 	regmatch_t *regmatch = &view->regmatch;
3322 	const struct got_error *err;
3323 	int nprinted = 0;
3324 	char *line;
3325 	size_t linesize = 0;
3326 	ssize_t linelen;
3327 	struct tog_color *tc;
3328 	wchar_t *wline;
3329 	int width;
3330 	int max_lines = view->nlines;
3331 	int nlines = s->nlines;
3332 	off_t line_offset;
3333 
3334 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3335 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3336 		return got_error_from_errno("fseek");
3337 
3338 	werase(view->window);
3339 
3340 	if (header) {
3341 		if (asprintf(&line, "[%d/%d] %s",
3342 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3343 		    header) == -1)
3344 			return got_error_from_errno("asprintf");
3345 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3346 		    0, 0);
3347 		free(line);
3348 		if (err)
3349 			return err;
3350 
3351 		if (view_needs_focus_indication(view))
3352 			wstandout(view->window);
3353 		waddwstr(view->window, wline);
3354 		free(wline);
3355 		wline = NULL;
3356 		if (view_needs_focus_indication(view))
3357 			wstandend(view->window);
3358 		if (width <= view->ncols - 1)
3359 			waddch(view->window, '\n');
3360 
3361 		if (max_lines <= 1)
3362 			return NULL;
3363 		max_lines--;
3364 	}
3365 
3366 	s->eof = 0;
3367 	view->maxx = 0;
3368 	line = NULL;
3369 	while (max_lines > 0 && nprinted < max_lines) {
3370 		linelen = getline(&line, &linesize, s->f);
3371 		if (linelen == -1) {
3372 			if (feof(s->f)) {
3373 				s->eof = 1;
3374 				break;
3375 			}
3376 			free(line);
3377 			return got_ferror(s->f, GOT_ERR_IO);
3378 		}
3379 
3380 		/* Set view->maxx based on full line length. */
3381 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3382 		    view->x ? 1 : 0);
3383 		if (err) {
3384 			free(line);
3385 			return err;
3386 		}
3387 		view->maxx = MAX(view->maxx, width);
3388 		free(wline);
3389 		wline = NULL;
3390 
3391 		tc = match_color(&s->colors, line);
3392 		if (tc)
3393 			wattr_on(view->window,
3394 			    COLOR_PAIR(tc->colorpair), NULL);
3395 		if (s->first_displayed_line + nprinted == s->matched_line &&
3396 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3397 			err = add_matched_line(&width, line, view->ncols, 0,
3398 			    view->window, view->x, regmatch);
3399 			if (err) {
3400 				free(line);
3401 				return err;
3402 			}
3403 		} else {
3404 			int skip;
3405 			err = format_line(&wline, &width, &skip, line,
3406 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3407 			if (err) {
3408 				free(line);
3409 				return err;
3410 			}
3411 			waddwstr(view->window, &wline[skip]);
3412 			free(wline);
3413 			wline = NULL;
3414 		}
3415 		if (tc)
3416 			wattr_off(view->window,
3417 			    COLOR_PAIR(tc->colorpair), NULL);
3418 		if (width <= view->ncols - 1)
3419 			waddch(view->window, '\n');
3420 		nprinted++;
3421 	}
3422 	free(line);
3423 	if (nprinted >= 1)
3424 		s->last_displayed_line = s->first_displayed_line +
3425 		    (nprinted - 1);
3426 	else
3427 		s->last_displayed_line = s->first_displayed_line;
3428 
3429 	view_vborder(view);
3430 
3431 	if (s->eof) {
3432 		while (nprinted < view->nlines) {
3433 			waddch(view->window, '\n');
3434 			nprinted++;
3435 		}
3436 
3437 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3438 		    view->ncols, 0, 0);
3439 		if (err) {
3440 			return err;
3441 		}
3442 
3443 		wstandout(view->window);
3444 		waddwstr(view->window, wline);
3445 		free(wline);
3446 		wline = NULL;
3447 		wstandend(view->window);
3448 	}
3449 
3450 	return NULL;
3451 }
3452 
3453 static char *
3454 get_datestr(time_t *time, char *datebuf)
3455 {
3456 	struct tm mytm, *tm;
3457 	char *p, *s;
3458 
3459 	tm = gmtime_r(time, &mytm);
3460 	if (tm == NULL)
3461 		return NULL;
3462 	s = asctime_r(tm, datebuf);
3463 	if (s == NULL)
3464 		return NULL;
3465 	p = strchr(s, '\n');
3466 	if (p)
3467 		*p = '\0';
3468 	return s;
3469 }
3470 
3471 static const struct got_error *
3472 get_changed_paths(struct got_pathlist_head *paths,
3473     struct got_commit_object *commit, struct got_repository *repo)
3474 {
3475 	const struct got_error *err = NULL;
3476 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3477 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3478 	struct got_object_qid *qid;
3479 
3480 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3481 	if (qid != NULL) {
3482 		struct got_commit_object *pcommit;
3483 		err = got_object_open_as_commit(&pcommit, repo,
3484 		    &qid->id);
3485 		if (err)
3486 			return err;
3487 
3488 		tree_id1 = got_object_id_dup(
3489 		    got_object_commit_get_tree_id(pcommit));
3490 		if (tree_id1 == NULL) {
3491 			got_object_commit_close(pcommit);
3492 			return got_error_from_errno("got_object_id_dup");
3493 		}
3494 		got_object_commit_close(pcommit);
3495 
3496 	}
3497 
3498 	if (tree_id1) {
3499 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3500 		if (err)
3501 			goto done;
3502 	}
3503 
3504 	tree_id2 = got_object_commit_get_tree_id(commit);
3505 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3506 	if (err)
3507 		goto done;
3508 
3509 	err = got_diff_tree(tree1, tree2, NULL, NULL, -1, -1, "", "", repo,
3510 	    got_diff_tree_collect_changed_paths, paths, 0);
3511 done:
3512 	if (tree1)
3513 		got_object_tree_close(tree1);
3514 	if (tree2)
3515 		got_object_tree_close(tree2);
3516 	free(tree_id1);
3517 	return err;
3518 }
3519 
3520 static const struct got_error *
3521 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3522 {
3523 	off_t *p;
3524 
3525 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3526 	if (p == NULL)
3527 		return got_error_from_errno("reallocarray");
3528 	*line_offsets = p;
3529 	(*line_offsets)[*nlines] = off;
3530 	(*nlines)++;
3531 	return NULL;
3532 }
3533 
3534 static const struct got_error *
3535 write_commit_info(off_t **line_offsets, size_t *nlines,
3536     struct got_object_id *commit_id, struct got_reflist_head *refs,
3537     struct got_repository *repo, FILE *outfile)
3538 {
3539 	const struct got_error *err = NULL;
3540 	char datebuf[26], *datestr;
3541 	struct got_commit_object *commit;
3542 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3543 	time_t committer_time;
3544 	const char *author, *committer;
3545 	char *refs_str = NULL;
3546 	struct got_pathlist_head changed_paths;
3547 	struct got_pathlist_entry *pe;
3548 	off_t outoff = 0;
3549 	int n;
3550 
3551 	TAILQ_INIT(&changed_paths);
3552 
3553 	if (refs) {
3554 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3555 		if (err)
3556 			return err;
3557 	}
3558 
3559 	err = got_object_open_as_commit(&commit, repo, commit_id);
3560 	if (err)
3561 		return err;
3562 
3563 	err = got_object_id_str(&id_str, commit_id);
3564 	if (err) {
3565 		err = got_error_from_errno("got_object_id_str");
3566 		goto done;
3567 	}
3568 
3569 	err = add_line_offset(line_offsets, nlines, 0);
3570 	if (err)
3571 		goto done;
3572 
3573 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3574 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3575 	if (n < 0) {
3576 		err = got_error_from_errno("fprintf");
3577 		goto done;
3578 	}
3579 	outoff += n;
3580 	err = add_line_offset(line_offsets, nlines, outoff);
3581 	if (err)
3582 		goto done;
3583 
3584 	n = fprintf(outfile, "from: %s\n",
3585 	    got_object_commit_get_author(commit));
3586 	if (n < 0) {
3587 		err = got_error_from_errno("fprintf");
3588 		goto done;
3589 	}
3590 	outoff += n;
3591 	err = add_line_offset(line_offsets, nlines, outoff);
3592 	if (err)
3593 		goto done;
3594 
3595 	committer_time = got_object_commit_get_committer_time(commit);
3596 	datestr = get_datestr(&committer_time, datebuf);
3597 	if (datestr) {
3598 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3599 		if (n < 0) {
3600 			err = got_error_from_errno("fprintf");
3601 			goto done;
3602 		}
3603 		outoff += n;
3604 		err = add_line_offset(line_offsets, nlines, outoff);
3605 		if (err)
3606 			goto done;
3607 	}
3608 	author = got_object_commit_get_author(commit);
3609 	committer = got_object_commit_get_committer(commit);
3610 	if (strcmp(author, committer) != 0) {
3611 		n = fprintf(outfile, "via: %s\n", committer);
3612 		if (n < 0) {
3613 			err = got_error_from_errno("fprintf");
3614 			goto done;
3615 		}
3616 		outoff += n;
3617 		err = add_line_offset(line_offsets, nlines, outoff);
3618 		if (err)
3619 			goto done;
3620 	}
3621 	if (got_object_commit_get_nparents(commit) > 1) {
3622 		const struct got_object_id_queue *parent_ids;
3623 		struct got_object_qid *qid;
3624 		int pn = 1;
3625 		parent_ids = got_object_commit_get_parent_ids(commit);
3626 		STAILQ_FOREACH(qid, parent_ids, entry) {
3627 			err = got_object_id_str(&id_str, &qid->id);
3628 			if (err)
3629 				goto done;
3630 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3631 			if (n < 0) {
3632 				err = got_error_from_errno("fprintf");
3633 				goto done;
3634 			}
3635 			outoff += n;
3636 			err = add_line_offset(line_offsets, nlines, outoff);
3637 			if (err)
3638 				goto done;
3639 			free(id_str);
3640 			id_str = NULL;
3641 		}
3642 	}
3643 
3644 	err = got_object_commit_get_logmsg(&logmsg, commit);
3645 	if (err)
3646 		goto done;
3647 	s = logmsg;
3648 	while ((line = strsep(&s, "\n")) != NULL) {
3649 		n = fprintf(outfile, "%s\n", line);
3650 		if (n < 0) {
3651 			err = got_error_from_errno("fprintf");
3652 			goto done;
3653 		}
3654 		outoff += n;
3655 		err = add_line_offset(line_offsets, nlines, outoff);
3656 		if (err)
3657 			goto done;
3658 	}
3659 
3660 	err = get_changed_paths(&changed_paths, commit, repo);
3661 	if (err)
3662 		goto done;
3663 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3664 		struct got_diff_changed_path *cp = pe->data;
3665 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3666 		if (n < 0) {
3667 			err = got_error_from_errno("fprintf");
3668 			goto done;
3669 		}
3670 		outoff += n;
3671 		err = add_line_offset(line_offsets, nlines, outoff);
3672 		if (err)
3673 			goto done;
3674 		free((char *)pe->path);
3675 		free(pe->data);
3676 	}
3677 
3678 	fputc('\n', outfile);
3679 	outoff++;
3680 	err = add_line_offset(line_offsets, nlines, outoff);
3681 done:
3682 	got_pathlist_free(&changed_paths);
3683 	free(id_str);
3684 	free(logmsg);
3685 	free(refs_str);
3686 	got_object_commit_close(commit);
3687 	if (err) {
3688 		free(*line_offsets);
3689 		*line_offsets = NULL;
3690 		*nlines = 0;
3691 	}
3692 	return err;
3693 }
3694 
3695 static const struct got_error *
3696 create_diff(struct tog_diff_view_state *s)
3697 {
3698 	const struct got_error *err = NULL;
3699 	FILE *f = NULL;
3700 	int obj_type;
3701 
3702 	free(s->line_offsets);
3703 	s->line_offsets = malloc(sizeof(off_t));
3704 	if (s->line_offsets == NULL)
3705 		return got_error_from_errno("malloc");
3706 	s->nlines = 0;
3707 
3708 	f = got_opentemp();
3709 	if (f == NULL) {
3710 		err = got_error_from_errno("got_opentemp");
3711 		goto done;
3712 	}
3713 	if (s->f && fclose(s->f) == EOF) {
3714 		err = got_error_from_errno("fclose");
3715 		goto done;
3716 	}
3717 	s->f = f;
3718 
3719 	if (s->id1)
3720 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3721 	else
3722 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3723 	if (err)
3724 		goto done;
3725 
3726 	switch (obj_type) {
3727 	case GOT_OBJ_TYPE_BLOB:
3728 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3729 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
3730 		    s->label1, s->label2, s->diff_context,
3731 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3732 		break;
3733 	case GOT_OBJ_TYPE_TREE:
3734 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3735 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
3736 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3737 		    s->repo, s->f);
3738 		break;
3739 	case GOT_OBJ_TYPE_COMMIT: {
3740 		const struct got_object_id_queue *parent_ids;
3741 		struct got_object_qid *pid;
3742 		struct got_commit_object *commit2;
3743 		struct got_reflist_head *refs;
3744 
3745 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3746 		if (err)
3747 			goto done;
3748 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3749 		/* Show commit info if we're diffing to a parent/root commit. */
3750 		if (s->id1 == NULL) {
3751 			err = write_commit_info(&s->line_offsets, &s->nlines,
3752 			    s->id2, refs, s->repo, s->f);
3753 			if (err)
3754 				goto done;
3755 		} else {
3756 			parent_ids = got_object_commit_get_parent_ids(commit2);
3757 			STAILQ_FOREACH(pid, parent_ids, entry) {
3758 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3759 					err = write_commit_info(
3760 					    &s->line_offsets, &s->nlines,
3761 					    s->id2, refs, s->repo, s->f);
3762 					if (err)
3763 						goto done;
3764 					break;
3765 				}
3766 			}
3767 		}
3768 		got_object_commit_close(commit2);
3769 
3770 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3771 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
3772 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3773 		    s->repo, s->f);
3774 		break;
3775 	}
3776 	default:
3777 		err = got_error(GOT_ERR_OBJ_TYPE);
3778 		break;
3779 	}
3780 	if (err)
3781 		goto done;
3782 done:
3783 	if (s->f && fflush(s->f) != 0 && err == NULL)
3784 		err = got_error_from_errno("fflush");
3785 	return err;
3786 }
3787 
3788 static void
3789 diff_view_indicate_progress(struct tog_view *view)
3790 {
3791 	mvwaddstr(view->window, 0, 0, "diffing...");
3792 	update_panels();
3793 	doupdate();
3794 }
3795 
3796 static const struct got_error *
3797 search_start_diff_view(struct tog_view *view)
3798 {
3799 	struct tog_diff_view_state *s = &view->state.diff;
3800 
3801 	s->matched_line = 0;
3802 	return NULL;
3803 }
3804 
3805 static const struct got_error *
3806 search_next_diff_view(struct tog_view *view)
3807 {
3808 	struct tog_diff_view_state *s = &view->state.diff;
3809 	const struct got_error *err = NULL;
3810 	int lineno;
3811 	char *line = NULL;
3812 	size_t linesize = 0;
3813 	ssize_t linelen;
3814 
3815 	if (!view->searching) {
3816 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3817 		return NULL;
3818 	}
3819 
3820 	if (s->matched_line) {
3821 		if (view->searching == TOG_SEARCH_FORWARD)
3822 			lineno = s->matched_line + 1;
3823 		else
3824 			lineno = s->matched_line - 1;
3825 	} else
3826 		lineno = s->first_displayed_line;
3827 
3828 	while (1) {
3829 		off_t offset;
3830 
3831 		if (lineno <= 0 || lineno > s->nlines) {
3832 			if (s->matched_line == 0) {
3833 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3834 				break;
3835 			}
3836 
3837 			if (view->searching == TOG_SEARCH_FORWARD)
3838 				lineno = 1;
3839 			else
3840 				lineno = s->nlines;
3841 		}
3842 
3843 		offset = s->line_offsets[lineno - 1];
3844 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3845 			free(line);
3846 			return got_error_from_errno("fseeko");
3847 		}
3848 		linelen = getline(&line, &linesize, s->f);
3849 		if (linelen != -1) {
3850 			char *exstr;
3851 			err = expand_tab(&exstr, line);
3852 			if (err)
3853 				break;
3854 			if (match_line(exstr, &view->regex, 1,
3855 			    &view->regmatch)) {
3856 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3857 				s->matched_line = lineno;
3858 				free(exstr);
3859 				break;
3860 			}
3861 			free(exstr);
3862 		}
3863 		if (view->searching == TOG_SEARCH_FORWARD)
3864 			lineno++;
3865 		else
3866 			lineno--;
3867 	}
3868 	free(line);
3869 
3870 	if (s->matched_line) {
3871 		s->first_displayed_line = s->matched_line;
3872 		s->selected_line = 1;
3873 	}
3874 
3875 	return err;
3876 }
3877 
3878 static const struct got_error *
3879 close_diff_view(struct tog_view *view)
3880 {
3881 	const struct got_error *err = NULL;
3882 	struct tog_diff_view_state *s = &view->state.diff;
3883 
3884 	free(s->id1);
3885 	s->id1 = NULL;
3886 	free(s->id2);
3887 	s->id2 = NULL;
3888 	if (s->f && fclose(s->f) == EOF)
3889 		err = got_error_from_errno("fclose");
3890 	s->f = NULL;
3891 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
3892 		err = got_error_from_errno("fclose");
3893 	s->f1 = NULL;
3894 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
3895 		err = got_error_from_errno("fclose");
3896 	s->f2 = NULL;
3897 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
3898 		err = got_error_from_errno("close");
3899 	s->fd1 = -1;
3900 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
3901 		err = got_error_from_errno("close");
3902 	s->fd2 = -1;
3903 	free_colors(&s->colors);
3904 	free(s->line_offsets);
3905 	s->line_offsets = NULL;
3906 	s->nlines = 0;
3907 	return err;
3908 }
3909 
3910 static const struct got_error *
3911 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3912     struct got_object_id *id2, const char *label1, const char *label2,
3913     int diff_context, int ignore_whitespace, int force_text_diff,
3914     struct tog_view *log_view, struct got_repository *repo)
3915 {
3916 	const struct got_error *err;
3917 	struct tog_diff_view_state *s = &view->state.diff;
3918 
3919 	memset(s, 0, sizeof(*s));
3920 	s->fd1 = -1;
3921 	s->fd2 = -1;
3922 
3923 	if (id1 != NULL && id2 != NULL) {
3924 	    int type1, type2;
3925 	    err = got_object_get_type(&type1, repo, id1);
3926 	    if (err)
3927 		return err;
3928 	    err = got_object_get_type(&type2, repo, id2);
3929 	    if (err)
3930 		return err;
3931 
3932 	    if (type1 != type2)
3933 		return got_error(GOT_ERR_OBJ_TYPE);
3934 	}
3935 	s->first_displayed_line = 1;
3936 	s->last_displayed_line = view->nlines;
3937 	s->selected_line = 1;
3938 	s->repo = repo;
3939 	s->id1 = id1;
3940 	s->id2 = id2;
3941 	s->label1 = label1;
3942 	s->label2 = label2;
3943 
3944 	if (id1) {
3945 		s->id1 = got_object_id_dup(id1);
3946 		if (s->id1 == NULL)
3947 			return got_error_from_errno("got_object_id_dup");
3948 	} else
3949 		s->id1 = NULL;
3950 
3951 	s->id2 = got_object_id_dup(id2);
3952 	if (s->id2 == NULL) {
3953 		err = got_error_from_errno("got_object_id_dup");
3954 		goto done;
3955 	}
3956 
3957 	s->f1 = got_opentemp();
3958 	if (s->f1 == NULL) {
3959 		err = got_error_from_errno("got_opentemp");
3960 		goto done;
3961 	}
3962 
3963 	s->f2 = got_opentemp();
3964 	if (s->f2 == NULL) {
3965 		err = got_error_from_errno("got_opentemp");
3966 		goto done;
3967 	}
3968 
3969 	s->fd1 = got_opentempfd();
3970 	if (s->fd1 == -1) {
3971 		err = got_error_from_errno("got_opentempfd");
3972 		goto done;
3973 	}
3974 
3975 	s->fd2 = got_opentempfd();
3976 	if (s->fd2 == -1) {
3977 		err = got_error_from_errno("got_opentempfd");
3978 		goto done;
3979 	}
3980 
3981 	s->first_displayed_line = 1;
3982 	s->last_displayed_line = view->nlines;
3983 	s->diff_context = diff_context;
3984 	s->ignore_whitespace = ignore_whitespace;
3985 	s->force_text_diff = force_text_diff;
3986 	s->log_view = log_view;
3987 	s->repo = repo;
3988 
3989 	STAILQ_INIT(&s->colors);
3990 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3991 		err = add_color(&s->colors,
3992 		    "^-", TOG_COLOR_DIFF_MINUS,
3993 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3994 		if (err)
3995 			goto done;
3996 		err = add_color(&s->colors, "^\\+",
3997 		    TOG_COLOR_DIFF_PLUS,
3998 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3999 		if (err)
4000 			goto done;
4001 		err = add_color(&s->colors,
4002 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
4003 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
4004 		if (err)
4005 			goto done;
4006 
4007 		err = add_color(&s->colors,
4008 		    "^(commit [0-9a-f]|parent [0-9]|"
4009 		    "(blob|file|tree|commit) [-+] |"
4010 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
4011 		    get_color_value("TOG_COLOR_DIFF_META"));
4012 		if (err)
4013 			goto done;
4014 
4015 		err = add_color(&s->colors,
4016 		    "^(from|via): ", TOG_COLOR_AUTHOR,
4017 		    get_color_value("TOG_COLOR_AUTHOR"));
4018 		if (err)
4019 			goto done;
4020 
4021 		err = add_color(&s->colors,
4022 		    "^date: ", TOG_COLOR_DATE,
4023 		    get_color_value("TOG_COLOR_DATE"));
4024 		if (err)
4025 			goto done;
4026 	}
4027 
4028 	if (log_view && view_is_splitscreen(view))
4029 		show_log_view(log_view); /* draw vborder */
4030 	diff_view_indicate_progress(view);
4031 
4032 	err = create_diff(s);
4033 
4034 	view->show = show_diff_view;
4035 	view->input = input_diff_view;
4036 	view->close = close_diff_view;
4037 	view->search_start = search_start_diff_view;
4038 	view->search_next = search_next_diff_view;
4039 done:
4040 	if (err)
4041 		close_diff_view(view);
4042 	return err;
4043 }
4044 
4045 static const struct got_error *
4046 show_diff_view(struct tog_view *view)
4047 {
4048 	const struct got_error *err;
4049 	struct tog_diff_view_state *s = &view->state.diff;
4050 	char *id_str1 = NULL, *id_str2, *header;
4051 	const char *label1, *label2;
4052 
4053 	if (s->id1) {
4054 		err = got_object_id_str(&id_str1, s->id1);
4055 		if (err)
4056 			return err;
4057 		label1 = s->label1 ? : id_str1;
4058 	} else
4059 		label1 = "/dev/null";
4060 
4061 	err = got_object_id_str(&id_str2, s->id2);
4062 	if (err)
4063 		return err;
4064 	label2 = s->label2 ? : id_str2;
4065 
4066 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4067 		err = got_error_from_errno("asprintf");
4068 		free(id_str1);
4069 		free(id_str2);
4070 		return err;
4071 	}
4072 	free(id_str1);
4073 	free(id_str2);
4074 
4075 	err = draw_file(view, header);
4076 	free(header);
4077 	return err;
4078 }
4079 
4080 static const struct got_error *
4081 set_selected_commit(struct tog_diff_view_state *s,
4082     struct commit_queue_entry *entry)
4083 {
4084 	const struct got_error *err;
4085 	const struct got_object_id_queue *parent_ids;
4086 	struct got_commit_object *selected_commit;
4087 	struct got_object_qid *pid;
4088 
4089 	free(s->id2);
4090 	s->id2 = got_object_id_dup(entry->id);
4091 	if (s->id2 == NULL)
4092 		return got_error_from_errno("got_object_id_dup");
4093 
4094 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4095 	if (err)
4096 		return err;
4097 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4098 	free(s->id1);
4099 	pid = STAILQ_FIRST(parent_ids);
4100 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4101 	got_object_commit_close(selected_commit);
4102 	return NULL;
4103 }
4104 
4105 static const struct got_error *
4106 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4107 {
4108 	const struct got_error *err = NULL;
4109 	struct tog_diff_view_state *s = &view->state.diff;
4110 	struct tog_log_view_state *ls;
4111 	struct commit_queue_entry *old_selected_entry;
4112 	char *line = NULL;
4113 	size_t linesize = 0;
4114 	ssize_t linelen;
4115 	int i, nscroll = view->nlines - 1;
4116 
4117 	switch (ch) {
4118 	case '0':
4119 		view->x = 0;
4120 		break;
4121 	case '$':
4122 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4123 		view->count = 0;
4124 		break;
4125 	case KEY_RIGHT:
4126 	case 'l':
4127 		if (view->x + view->ncols / 3 < view->maxx)
4128 			view->x += 2;  /* move two columns right */
4129 		else
4130 			view->count = 0;
4131 		break;
4132 	case KEY_LEFT:
4133 	case 'h':
4134 		view->x -= MIN(view->x, 2);  /* move two columns back */
4135 		if (view->x <= 0)
4136 			view->count = 0;
4137 		break;
4138 	case 'a':
4139 	case 'w':
4140 		if (ch == 'a')
4141 			s->force_text_diff = !s->force_text_diff;
4142 		if (ch == 'w')
4143 			s->ignore_whitespace = !s->ignore_whitespace;
4144 		wclear(view->window);
4145 		s->first_displayed_line = 1;
4146 		s->last_displayed_line = view->nlines;
4147 		s->matched_line = 0;
4148 		diff_view_indicate_progress(view);
4149 		err = create_diff(s);
4150 		view->count = 0;
4151 		break;
4152 	case 'g':
4153 	case KEY_HOME:
4154 		s->first_displayed_line = 1;
4155 		view->count = 0;
4156 		break;
4157 	case 'G':
4158 	case KEY_END:
4159 		view->count = 0;
4160 		if (s->eof)
4161 			break;
4162 
4163 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4164 		s->eof = 1;
4165 		break;
4166 	case 'k':
4167 	case KEY_UP:
4168 	case CTRL('p'):
4169 		if (s->first_displayed_line > 1)
4170 			s->first_displayed_line--;
4171 		else
4172 			view->count = 0;
4173 		break;
4174 	case CTRL('u'):
4175 	case 'u':
4176 		nscroll /= 2;
4177 		/* FALL THROUGH */
4178 	case KEY_PPAGE:
4179 	case CTRL('b'):
4180 	case 'b':
4181 		if (s->first_displayed_line == 1) {
4182 			view->count = 0;
4183 			break;
4184 		}
4185 		i = 0;
4186 		while (i++ < nscroll && s->first_displayed_line > 1)
4187 			s->first_displayed_line--;
4188 		break;
4189 	case 'j':
4190 	case KEY_DOWN:
4191 	case CTRL('n'):
4192 		if (!s->eof)
4193 			s->first_displayed_line++;
4194 		else
4195 			view->count = 0;
4196 		break;
4197 	case CTRL('d'):
4198 	case 'd':
4199 		nscroll /= 2;
4200 		/* FALL THROUGH */
4201 	case KEY_NPAGE:
4202 	case CTRL('f'):
4203 	case 'f':
4204 	case ' ':
4205 		if (s->eof) {
4206 			view->count = 0;
4207 			break;
4208 		}
4209 		i = 0;
4210 		while (!s->eof && i++ < nscroll) {
4211 			linelen = getline(&line, &linesize, s->f);
4212 			s->first_displayed_line++;
4213 			if (linelen == -1) {
4214 				if (feof(s->f)) {
4215 					s->eof = 1;
4216 				} else
4217 					err = got_ferror(s->f, GOT_ERR_IO);
4218 				break;
4219 			}
4220 		}
4221 		free(line);
4222 		break;
4223 	case '[':
4224 		if (s->diff_context > 0) {
4225 			s->diff_context--;
4226 			s->matched_line = 0;
4227 			diff_view_indicate_progress(view);
4228 			err = create_diff(s);
4229 			if (s->first_displayed_line + view->nlines - 1 >
4230 			    s->nlines) {
4231 				s->first_displayed_line = 1;
4232 				s->last_displayed_line = view->nlines;
4233 			}
4234 		} else
4235 			view->count = 0;
4236 		break;
4237 	case ']':
4238 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4239 			s->diff_context++;
4240 			s->matched_line = 0;
4241 			diff_view_indicate_progress(view);
4242 			err = create_diff(s);
4243 		} else
4244 			view->count = 0;
4245 		break;
4246 	case '<':
4247 	case ',':
4248 		if (s->log_view == NULL) {
4249 			view->count = 0;
4250 			break;
4251 		}
4252 		ls = &s->log_view->state.log;
4253 		old_selected_entry = ls->selected_entry;
4254 
4255 		/* view->count handled in input_log_view() */
4256 		err = input_log_view(NULL, s->log_view, KEY_UP);
4257 		if (err)
4258 			break;
4259 
4260 		if (old_selected_entry == ls->selected_entry)
4261 			break;
4262 
4263 		err = set_selected_commit(s, ls->selected_entry);
4264 		if (err)
4265 			break;
4266 
4267 		s->first_displayed_line = 1;
4268 		s->last_displayed_line = view->nlines;
4269 		s->matched_line = 0;
4270 		view->x = 0;
4271 
4272 		diff_view_indicate_progress(view);
4273 		err = create_diff(s);
4274 		break;
4275 	case '>':
4276 	case '.':
4277 		if (s->log_view == NULL) {
4278 			view->count = 0;
4279 			break;
4280 		}
4281 		ls = &s->log_view->state.log;
4282 		old_selected_entry = ls->selected_entry;
4283 
4284 		/* view->count handled in input_log_view() */
4285 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4286 		if (err)
4287 			break;
4288 
4289 		if (old_selected_entry == ls->selected_entry)
4290 			break;
4291 
4292 		err = set_selected_commit(s, ls->selected_entry);
4293 		if (err)
4294 			break;
4295 
4296 		s->first_displayed_line = 1;
4297 		s->last_displayed_line = view->nlines;
4298 		s->matched_line = 0;
4299 		view->x = 0;
4300 
4301 		diff_view_indicate_progress(view);
4302 		err = create_diff(s);
4303 		break;
4304 	default:
4305 		view->count = 0;
4306 		break;
4307 	}
4308 
4309 	return err;
4310 }
4311 
4312 static const struct got_error *
4313 cmd_diff(int argc, char *argv[])
4314 {
4315 	const struct got_error *error = NULL;
4316 	struct got_repository *repo = NULL;
4317 	struct got_worktree *worktree = NULL;
4318 	struct got_object_id *id1 = NULL, *id2 = NULL;
4319 	char *repo_path = NULL, *cwd = NULL;
4320 	char *id_str1 = NULL, *id_str2 = NULL;
4321 	char *label1 = NULL, *label2 = NULL;
4322 	int diff_context = 3, ignore_whitespace = 0;
4323 	int ch, force_text_diff = 0;
4324 	const char *errstr;
4325 	struct tog_view *view;
4326 	int *pack_fds = NULL;
4327 
4328 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4329 		switch (ch) {
4330 		case 'a':
4331 			force_text_diff = 1;
4332 			break;
4333 		case 'C':
4334 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4335 			    &errstr);
4336 			if (errstr != NULL)
4337 				errx(1, "number of context lines is %s: %s",
4338 				    errstr, errstr);
4339 			break;
4340 		case 'r':
4341 			repo_path = realpath(optarg, NULL);
4342 			if (repo_path == NULL)
4343 				return got_error_from_errno2("realpath",
4344 				    optarg);
4345 			got_path_strip_trailing_slashes(repo_path);
4346 			break;
4347 		case 'w':
4348 			ignore_whitespace = 1;
4349 			break;
4350 		default:
4351 			usage_diff();
4352 			/* NOTREACHED */
4353 		}
4354 	}
4355 
4356 	argc -= optind;
4357 	argv += optind;
4358 
4359 	if (argc == 0) {
4360 		usage_diff(); /* TODO show local worktree changes */
4361 	} else if (argc == 2) {
4362 		id_str1 = argv[0];
4363 		id_str2 = argv[1];
4364 	} else
4365 		usage_diff();
4366 
4367 	error = got_repo_pack_fds_open(&pack_fds);
4368 	if (error)
4369 		goto done;
4370 
4371 	if (repo_path == NULL) {
4372 		cwd = getcwd(NULL, 0);
4373 		if (cwd == NULL)
4374 			return got_error_from_errno("getcwd");
4375 		error = got_worktree_open(&worktree, cwd);
4376 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4377 			goto done;
4378 		if (worktree)
4379 			repo_path =
4380 			    strdup(got_worktree_get_repo_path(worktree));
4381 		else
4382 			repo_path = strdup(cwd);
4383 		if (repo_path == NULL) {
4384 			error = got_error_from_errno("strdup");
4385 			goto done;
4386 		}
4387 	}
4388 
4389 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4390 	if (error)
4391 		goto done;
4392 
4393 	init_curses();
4394 
4395 	error = apply_unveil(got_repo_get_path(repo), NULL);
4396 	if (error)
4397 		goto done;
4398 
4399 	error = tog_load_refs(repo, 0);
4400 	if (error)
4401 		goto done;
4402 
4403 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4404 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4405 	if (error)
4406 		goto done;
4407 
4408 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4409 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4410 	if (error)
4411 		goto done;
4412 
4413 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4414 	if (view == NULL) {
4415 		error = got_error_from_errno("view_open");
4416 		goto done;
4417 	}
4418 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4419 	    ignore_whitespace, force_text_diff, NULL,  repo);
4420 	if (error)
4421 		goto done;
4422 	error = view_loop(view);
4423 done:
4424 	free(label1);
4425 	free(label2);
4426 	free(repo_path);
4427 	free(cwd);
4428 	if (repo) {
4429 		const struct got_error *close_err = got_repo_close(repo);
4430 		if (error == NULL)
4431 			error = close_err;
4432 	}
4433 	if (worktree)
4434 		got_worktree_close(worktree);
4435 	if (pack_fds) {
4436 		const struct got_error *pack_err =
4437 		    got_repo_pack_fds_close(pack_fds);
4438 		if (error == NULL)
4439 			error = pack_err;
4440 	}
4441 	tog_free_refs();
4442 	return error;
4443 }
4444 
4445 __dead static void
4446 usage_blame(void)
4447 {
4448 	endwin();
4449 	fprintf(stderr,
4450 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4451 	    getprogname());
4452 	exit(1);
4453 }
4454 
4455 struct tog_blame_line {
4456 	int annotated;
4457 	struct got_object_id *id;
4458 };
4459 
4460 static const struct got_error *
4461 draw_blame(struct tog_view *view)
4462 {
4463 	struct tog_blame_view_state *s = &view->state.blame;
4464 	struct tog_blame *blame = &s->blame;
4465 	regmatch_t *regmatch = &view->regmatch;
4466 	const struct got_error *err;
4467 	int lineno = 0, nprinted = 0;
4468 	char *line = NULL;
4469 	size_t linesize = 0;
4470 	ssize_t linelen;
4471 	wchar_t *wline;
4472 	int width;
4473 	struct tog_blame_line *blame_line;
4474 	struct got_object_id *prev_id = NULL;
4475 	char *id_str;
4476 	struct tog_color *tc;
4477 
4478 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4479 	if (err)
4480 		return err;
4481 
4482 	rewind(blame->f);
4483 	werase(view->window);
4484 
4485 	if (asprintf(&line, "commit %s", id_str) == -1) {
4486 		err = got_error_from_errno("asprintf");
4487 		free(id_str);
4488 		return err;
4489 	}
4490 
4491 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4492 	free(line);
4493 	line = NULL;
4494 	if (err)
4495 		return err;
4496 	if (view_needs_focus_indication(view))
4497 		wstandout(view->window);
4498 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4499 	if (tc)
4500 		wattr_on(view->window,
4501 		    COLOR_PAIR(tc->colorpair), NULL);
4502 	waddwstr(view->window, wline);
4503 	if (tc)
4504 		wattr_off(view->window,
4505 		    COLOR_PAIR(tc->colorpair), NULL);
4506 	if (view_needs_focus_indication(view))
4507 		wstandend(view->window);
4508 	free(wline);
4509 	wline = NULL;
4510 	if (width < view->ncols - 1)
4511 		waddch(view->window, '\n');
4512 
4513 	if (asprintf(&line, "[%d/%d] %s%s",
4514 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4515 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4516 		free(id_str);
4517 		return got_error_from_errno("asprintf");
4518 	}
4519 	free(id_str);
4520 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4521 	free(line);
4522 	line = NULL;
4523 	if (err)
4524 		return err;
4525 	waddwstr(view->window, wline);
4526 	free(wline);
4527 	wline = NULL;
4528 	if (width < view->ncols - 1)
4529 		waddch(view->window, '\n');
4530 
4531 	s->eof = 0;
4532 	view->maxx = 0;
4533 	while (nprinted < view->nlines - 2) {
4534 		linelen = getline(&line, &linesize, blame->f);
4535 		if (linelen == -1) {
4536 			if (feof(blame->f)) {
4537 				s->eof = 1;
4538 				break;
4539 			}
4540 			free(line);
4541 			return got_ferror(blame->f, GOT_ERR_IO);
4542 		}
4543 		if (++lineno < s->first_displayed_line)
4544 			continue;
4545 
4546 		/* Set view->maxx based on full line length. */
4547 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4548 		if (err) {
4549 			free(line);
4550 			return err;
4551 		}
4552 		free(wline);
4553 		wline = NULL;
4554 		view->maxx = MAX(view->maxx, width);
4555 
4556 		if (view->focussed && nprinted == s->selected_line - 1)
4557 			wstandout(view->window);
4558 
4559 		if (blame->nlines > 0) {
4560 			blame_line = &blame->lines[lineno - 1];
4561 			if (blame_line->annotated && prev_id &&
4562 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4563 			    !(view->focussed &&
4564 			    nprinted == s->selected_line - 1)) {
4565 				waddstr(view->window, "        ");
4566 			} else if (blame_line->annotated) {
4567 				char *id_str;
4568 				err = got_object_id_str(&id_str,
4569 				    blame_line->id);
4570 				if (err) {
4571 					free(line);
4572 					return err;
4573 				}
4574 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4575 				if (tc)
4576 					wattr_on(view->window,
4577 					    COLOR_PAIR(tc->colorpair), NULL);
4578 				wprintw(view->window, "%.8s", id_str);
4579 				if (tc)
4580 					wattr_off(view->window,
4581 					    COLOR_PAIR(tc->colorpair), NULL);
4582 				free(id_str);
4583 				prev_id = blame_line->id;
4584 			} else {
4585 				waddstr(view->window, "........");
4586 				prev_id = NULL;
4587 			}
4588 		} else {
4589 			waddstr(view->window, "........");
4590 			prev_id = NULL;
4591 		}
4592 
4593 		if (view->focussed && nprinted == s->selected_line - 1)
4594 			wstandend(view->window);
4595 		waddstr(view->window, " ");
4596 
4597 		if (view->ncols <= 9) {
4598 			width = 9;
4599 		} else if (s->first_displayed_line + nprinted ==
4600 		    s->matched_line &&
4601 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4602 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4603 			    view->window, view->x, regmatch);
4604 			if (err) {
4605 				free(line);
4606 				return err;
4607 			}
4608 			width += 9;
4609 		} else {
4610 			int skip;
4611 			err = format_line(&wline, &width, &skip, line,
4612 			    view->x, view->ncols - 9, 9, 1);
4613 			if (err) {
4614 				free(line);
4615 				return err;
4616 			}
4617 			waddwstr(view->window, &wline[skip]);
4618 			width += 9;
4619 			free(wline);
4620 			wline = NULL;
4621 		}
4622 
4623 		if (width <= view->ncols - 1)
4624 			waddch(view->window, '\n');
4625 		if (++nprinted == 1)
4626 			s->first_displayed_line = lineno;
4627 	}
4628 	free(line);
4629 	s->last_displayed_line = lineno;
4630 
4631 	view_vborder(view);
4632 
4633 	return NULL;
4634 }
4635 
4636 static const struct got_error *
4637 blame_cb(void *arg, int nlines, int lineno,
4638     struct got_commit_object *commit, struct got_object_id *id)
4639 {
4640 	const struct got_error *err = NULL;
4641 	struct tog_blame_cb_args *a = arg;
4642 	struct tog_blame_line *line;
4643 	int errcode;
4644 
4645 	if (nlines != a->nlines ||
4646 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4647 		return got_error(GOT_ERR_RANGE);
4648 
4649 	errcode = pthread_mutex_lock(&tog_mutex);
4650 	if (errcode)
4651 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4652 
4653 	if (*a->quit) {	/* user has quit the blame view */
4654 		err = got_error(GOT_ERR_ITER_COMPLETED);
4655 		goto done;
4656 	}
4657 
4658 	if (lineno == -1)
4659 		goto done; /* no change in this commit */
4660 
4661 	line = &a->lines[lineno - 1];
4662 	if (line->annotated)
4663 		goto done;
4664 
4665 	line->id = got_object_id_dup(id);
4666 	if (line->id == NULL) {
4667 		err = got_error_from_errno("got_object_id_dup");
4668 		goto done;
4669 	}
4670 	line->annotated = 1;
4671 done:
4672 	errcode = pthread_mutex_unlock(&tog_mutex);
4673 	if (errcode)
4674 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4675 	return err;
4676 }
4677 
4678 static void *
4679 blame_thread(void *arg)
4680 {
4681 	const struct got_error *err, *close_err;
4682 	struct tog_blame_thread_args *ta = arg;
4683 	struct tog_blame_cb_args *a = ta->cb_args;
4684 	int errcode, fd = -1;
4685 
4686 	fd = got_opentempfd();
4687 	if (fd == -1)
4688 		return (void *)got_error_from_errno("got_opentempfd");
4689 
4690 	err = block_signals_used_by_main_thread();
4691 	if (err)
4692 		return (void *)err;
4693 
4694 	err = got_blame(ta->path, a->commit_id, ta->repo,
4695 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg, fd);
4696 	if (err && err->code == GOT_ERR_CANCELLED)
4697 		err = NULL;
4698 
4699 	errcode = pthread_mutex_lock(&tog_mutex);
4700 	if (errcode)
4701 		return (void *)got_error_set_errno(errcode,
4702 		    "pthread_mutex_lock");
4703 
4704 	close_err = got_repo_close(ta->repo);
4705 	if (err == NULL)
4706 		err = close_err;
4707 	ta->repo = NULL;
4708 	*ta->complete = 1;
4709 
4710 	errcode = pthread_mutex_unlock(&tog_mutex);
4711 	if (errcode && err == NULL)
4712 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4713 
4714 	if (fd != -1 && close(fd) == -1 && err == NULL)
4715 		err = got_error_from_errno("close");
4716 
4717 	return (void *)err;
4718 }
4719 
4720 static struct got_object_id *
4721 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4722     int first_displayed_line, int selected_line)
4723 {
4724 	struct tog_blame_line *line;
4725 
4726 	if (nlines <= 0)
4727 		return NULL;
4728 
4729 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4730 	if (!line->annotated)
4731 		return NULL;
4732 
4733 	return line->id;
4734 }
4735 
4736 static const struct got_error *
4737 stop_blame(struct tog_blame *blame)
4738 {
4739 	const struct got_error *err = NULL;
4740 	int i;
4741 
4742 	if (blame->thread) {
4743 		int errcode;
4744 		errcode = pthread_mutex_unlock(&tog_mutex);
4745 		if (errcode)
4746 			return got_error_set_errno(errcode,
4747 			    "pthread_mutex_unlock");
4748 		errcode = pthread_join(blame->thread, (void **)&err);
4749 		if (errcode)
4750 			return got_error_set_errno(errcode, "pthread_join");
4751 		errcode = pthread_mutex_lock(&tog_mutex);
4752 		if (errcode)
4753 			return got_error_set_errno(errcode,
4754 			    "pthread_mutex_lock");
4755 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4756 			err = NULL;
4757 		blame->thread = NULL;
4758 	}
4759 	if (blame->thread_args.repo) {
4760 		const struct got_error *close_err;
4761 		close_err = got_repo_close(blame->thread_args.repo);
4762 		if (err == NULL)
4763 			err = close_err;
4764 		blame->thread_args.repo = NULL;
4765 	}
4766 	if (blame->f) {
4767 		if (fclose(blame->f) == EOF && err == NULL)
4768 			err = got_error_from_errno("fclose");
4769 		blame->f = NULL;
4770 	}
4771 	if (blame->lines) {
4772 		for (i = 0; i < blame->nlines; i++)
4773 			free(blame->lines[i].id);
4774 		free(blame->lines);
4775 		blame->lines = NULL;
4776 	}
4777 	free(blame->cb_args.commit_id);
4778 	blame->cb_args.commit_id = NULL;
4779 	if (blame->pack_fds) {
4780 		const struct got_error *pack_err =
4781 		    got_repo_pack_fds_close(blame->pack_fds);
4782 		if (err == NULL)
4783 			err = pack_err;
4784 		blame->pack_fds = NULL;
4785 	}
4786 	return err;
4787 }
4788 
4789 static const struct got_error *
4790 cancel_blame_view(void *arg)
4791 {
4792 	const struct got_error *err = NULL;
4793 	int *done = arg;
4794 	int errcode;
4795 
4796 	errcode = pthread_mutex_lock(&tog_mutex);
4797 	if (errcode)
4798 		return got_error_set_errno(errcode,
4799 		    "pthread_mutex_unlock");
4800 
4801 	if (*done)
4802 		err = got_error(GOT_ERR_CANCELLED);
4803 
4804 	errcode = pthread_mutex_unlock(&tog_mutex);
4805 	if (errcode)
4806 		return got_error_set_errno(errcode,
4807 		    "pthread_mutex_lock");
4808 
4809 	return err;
4810 }
4811 
4812 static const struct got_error *
4813 run_blame(struct tog_view *view)
4814 {
4815 	struct tog_blame_view_state *s = &view->state.blame;
4816 	struct tog_blame *blame = &s->blame;
4817 	const struct got_error *err = NULL;
4818 	struct got_commit_object *commit = NULL;
4819 	struct got_blob_object *blob = NULL;
4820 	struct got_repository *thread_repo = NULL;
4821 	struct got_object_id *obj_id = NULL;
4822 	int obj_type, fd = -1;
4823 	int *pack_fds = NULL;
4824 
4825 	err = got_object_open_as_commit(&commit, s->repo,
4826 	    &s->blamed_commit->id);
4827 	if (err)
4828 		return err;
4829 
4830 	fd = got_opentempfd();
4831 	if (fd == -1) {
4832 		err = got_error_from_errno("got_opentempfd");
4833 		goto done;
4834 	}
4835 
4836 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4837 	if (err)
4838 		goto done;
4839 
4840 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4841 	if (err)
4842 		goto done;
4843 
4844 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4845 		err = got_error(GOT_ERR_OBJ_TYPE);
4846 		goto done;
4847 	}
4848 
4849 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
4850 	if (err)
4851 		goto done;
4852 	blame->f = got_opentemp();
4853 	if (blame->f == NULL) {
4854 		err = got_error_from_errno("got_opentemp");
4855 		goto done;
4856 	}
4857 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4858 	    &blame->line_offsets, blame->f, blob);
4859 	if (err)
4860 		goto done;
4861 	if (blame->nlines == 0) {
4862 		s->blame_complete = 1;
4863 		goto done;
4864 	}
4865 
4866 	/* Don't include \n at EOF in the blame line count. */
4867 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4868 		blame->nlines--;
4869 
4870 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4871 	if (blame->lines == NULL) {
4872 		err = got_error_from_errno("calloc");
4873 		goto done;
4874 	}
4875 
4876 	err = got_repo_pack_fds_open(&pack_fds);
4877 	if (err)
4878 		goto done;
4879 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4880 	    pack_fds);
4881 	if (err)
4882 		goto done;
4883 
4884 	blame->pack_fds = pack_fds;
4885 	blame->cb_args.view = view;
4886 	blame->cb_args.lines = blame->lines;
4887 	blame->cb_args.nlines = blame->nlines;
4888 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4889 	if (blame->cb_args.commit_id == NULL) {
4890 		err = got_error_from_errno("got_object_id_dup");
4891 		goto done;
4892 	}
4893 	blame->cb_args.quit = &s->done;
4894 
4895 	blame->thread_args.path = s->path;
4896 	blame->thread_args.repo = thread_repo;
4897 	blame->thread_args.cb_args = &blame->cb_args;
4898 	blame->thread_args.complete = &s->blame_complete;
4899 	blame->thread_args.cancel_cb = cancel_blame_view;
4900 	blame->thread_args.cancel_arg = &s->done;
4901 	s->blame_complete = 0;
4902 
4903 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4904 		s->first_displayed_line = 1;
4905 		s->last_displayed_line = view->nlines;
4906 		s->selected_line = 1;
4907 	}
4908 	s->matched_line = 0;
4909 
4910 done:
4911 	if (commit)
4912 		got_object_commit_close(commit);
4913 	if (fd != -1 && close(fd) == -1 && err == NULL)
4914 		err = got_error_from_errno("close");
4915 	if (blob)
4916 		got_object_blob_close(blob);
4917 	free(obj_id);
4918 	if (err)
4919 		stop_blame(blame);
4920 	return err;
4921 }
4922 
4923 static const struct got_error *
4924 open_blame_view(struct tog_view *view, char *path,
4925     struct got_object_id *commit_id, struct got_repository *repo)
4926 {
4927 	const struct got_error *err = NULL;
4928 	struct tog_blame_view_state *s = &view->state.blame;
4929 
4930 	STAILQ_INIT(&s->blamed_commits);
4931 
4932 	s->path = strdup(path);
4933 	if (s->path == NULL)
4934 		return got_error_from_errno("strdup");
4935 
4936 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4937 	if (err) {
4938 		free(s->path);
4939 		return err;
4940 	}
4941 
4942 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4943 	s->first_displayed_line = 1;
4944 	s->last_displayed_line = view->nlines;
4945 	s->selected_line = 1;
4946 	s->blame_complete = 0;
4947 	s->repo = repo;
4948 	s->commit_id = commit_id;
4949 	memset(&s->blame, 0, sizeof(s->blame));
4950 
4951 	STAILQ_INIT(&s->colors);
4952 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4953 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4954 		    get_color_value("TOG_COLOR_COMMIT"));
4955 		if (err)
4956 			return err;
4957 	}
4958 
4959 	view->show = show_blame_view;
4960 	view->input = input_blame_view;
4961 	view->close = close_blame_view;
4962 	view->search_start = search_start_blame_view;
4963 	view->search_next = search_next_blame_view;
4964 
4965 	return run_blame(view);
4966 }
4967 
4968 static const struct got_error *
4969 close_blame_view(struct tog_view *view)
4970 {
4971 	const struct got_error *err = NULL;
4972 	struct tog_blame_view_state *s = &view->state.blame;
4973 
4974 	if (s->blame.thread)
4975 		err = stop_blame(&s->blame);
4976 
4977 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4978 		struct got_object_qid *blamed_commit;
4979 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4980 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4981 		got_object_qid_free(blamed_commit);
4982 	}
4983 
4984 	free(s->path);
4985 	free_colors(&s->colors);
4986 	return err;
4987 }
4988 
4989 static const struct got_error *
4990 search_start_blame_view(struct tog_view *view)
4991 {
4992 	struct tog_blame_view_state *s = &view->state.blame;
4993 
4994 	s->matched_line = 0;
4995 	return NULL;
4996 }
4997 
4998 static const struct got_error *
4999 search_next_blame_view(struct tog_view *view)
5000 {
5001 	struct tog_blame_view_state *s = &view->state.blame;
5002 	const struct got_error *err = NULL;
5003 	int lineno;
5004 	char *line = NULL;
5005 	size_t linesize = 0;
5006 	ssize_t linelen;
5007 
5008 	if (!view->searching) {
5009 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5010 		return NULL;
5011 	}
5012 
5013 	if (s->matched_line) {
5014 		if (view->searching == TOG_SEARCH_FORWARD)
5015 			lineno = s->matched_line + 1;
5016 		else
5017 			lineno = s->matched_line - 1;
5018 	} else
5019 		lineno = s->first_displayed_line - 1 + s->selected_line;
5020 
5021 	while (1) {
5022 		off_t offset;
5023 
5024 		if (lineno <= 0 || lineno > s->blame.nlines) {
5025 			if (s->matched_line == 0) {
5026 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5027 				break;
5028 			}
5029 
5030 			if (view->searching == TOG_SEARCH_FORWARD)
5031 				lineno = 1;
5032 			else
5033 				lineno = s->blame.nlines;
5034 		}
5035 
5036 		offset = s->blame.line_offsets[lineno - 1];
5037 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5038 			free(line);
5039 			return got_error_from_errno("fseeko");
5040 		}
5041 		linelen = getline(&line, &linesize, s->blame.f);
5042 		if (linelen != -1) {
5043 			char *exstr;
5044 			err = expand_tab(&exstr, line);
5045 			if (err)
5046 				break;
5047 			if (match_line(exstr, &view->regex, 1,
5048 			    &view->regmatch)) {
5049 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5050 				s->matched_line = lineno;
5051 				free(exstr);
5052 				break;
5053 			}
5054 			free(exstr);
5055 		}
5056 		if (view->searching == TOG_SEARCH_FORWARD)
5057 			lineno++;
5058 		else
5059 			lineno--;
5060 	}
5061 	free(line);
5062 
5063 	if (s->matched_line) {
5064 		s->first_displayed_line = s->matched_line;
5065 		s->selected_line = 1;
5066 	}
5067 
5068 	return err;
5069 }
5070 
5071 static const struct got_error *
5072 show_blame_view(struct tog_view *view)
5073 {
5074 	const struct got_error *err = NULL;
5075 	struct tog_blame_view_state *s = &view->state.blame;
5076 	int errcode;
5077 
5078 	if (s->blame.thread == NULL && !s->blame_complete) {
5079 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5080 		    &s->blame.thread_args);
5081 		if (errcode)
5082 			return got_error_set_errno(errcode, "pthread_create");
5083 
5084 		halfdelay(1); /* fast refresh while annotating  */
5085 	}
5086 
5087 	if (s->blame_complete)
5088 		halfdelay(10); /* disable fast refresh */
5089 
5090 	err = draw_blame(view);
5091 
5092 	view_vborder(view);
5093 	return err;
5094 }
5095 
5096 static const struct got_error *
5097 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5098 {
5099 	const struct got_error *err = NULL, *thread_err = NULL;
5100 	struct tog_view *diff_view;
5101 	struct tog_blame_view_state *s = &view->state.blame;
5102 	int begin_x = 0, nscroll = view->nlines - 2;
5103 
5104 	switch (ch) {
5105 	case '0':
5106 		view->x = 0;
5107 		break;
5108 	case '$':
5109 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5110 		view->count = 0;
5111 		break;
5112 	case KEY_RIGHT:
5113 	case 'l':
5114 		if (view->x + view->ncols / 3 < view->maxx)
5115 			view->x += 2;  /* move two columns right */
5116 		else
5117 			view->count = 0;
5118 		break;
5119 	case KEY_LEFT:
5120 	case 'h':
5121 		view->x -= MIN(view->x, 2);  /* move two columns back */
5122 		if (view->x <= 0)
5123 			view->count = 0;
5124 		break;
5125 	case 'q':
5126 		s->done = 1;
5127 		break;
5128 	case 'g':
5129 	case KEY_HOME:
5130 		s->selected_line = 1;
5131 		s->first_displayed_line = 1;
5132 		view->count = 0;
5133 		break;
5134 	case 'G':
5135 	case KEY_END:
5136 		if (s->blame.nlines < view->nlines - 2) {
5137 			s->selected_line = s->blame.nlines;
5138 			s->first_displayed_line = 1;
5139 		} else {
5140 			s->selected_line = view->nlines - 2;
5141 			s->first_displayed_line = s->blame.nlines -
5142 			    (view->nlines - 3);
5143 		}
5144 		view->count = 0;
5145 		break;
5146 	case 'k':
5147 	case KEY_UP:
5148 	case CTRL('p'):
5149 		if (s->selected_line > 1)
5150 			s->selected_line--;
5151 		else if (s->selected_line == 1 &&
5152 		    s->first_displayed_line > 1)
5153 			s->first_displayed_line--;
5154 		else
5155 			view->count = 0;
5156 		break;
5157 	case CTRL('u'):
5158 	case 'u':
5159 		nscroll /= 2;
5160 		/* FALL THROUGH */
5161 	case KEY_PPAGE:
5162 	case CTRL('b'):
5163 	case 'b':
5164 		if (s->first_displayed_line == 1) {
5165 			if (view->count > 1)
5166 				nscroll += nscroll;
5167 			s->selected_line = MAX(1, s->selected_line - nscroll);
5168 			view->count = 0;
5169 			break;
5170 		}
5171 		if (s->first_displayed_line > nscroll)
5172 			s->first_displayed_line -= nscroll;
5173 		else
5174 			s->first_displayed_line = 1;
5175 		break;
5176 	case 'j':
5177 	case KEY_DOWN:
5178 	case CTRL('n'):
5179 		if (s->selected_line < view->nlines - 2 &&
5180 		    s->first_displayed_line +
5181 		    s->selected_line <= s->blame.nlines)
5182 			s->selected_line++;
5183 		else if (s->last_displayed_line <
5184 		    s->blame.nlines)
5185 			s->first_displayed_line++;
5186 		else
5187 			view->count = 0;
5188 		break;
5189 	case 'c':
5190 	case 'p': {
5191 		struct got_object_id *id = NULL;
5192 
5193 		view->count = 0;
5194 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5195 		    s->first_displayed_line, s->selected_line);
5196 		if (id == NULL)
5197 			break;
5198 		if (ch == 'p') {
5199 			struct got_commit_object *commit, *pcommit;
5200 			struct got_object_qid *pid;
5201 			struct got_object_id *blob_id = NULL;
5202 			int obj_type;
5203 			err = got_object_open_as_commit(&commit,
5204 			    s->repo, id);
5205 			if (err)
5206 				break;
5207 			pid = STAILQ_FIRST(
5208 			    got_object_commit_get_parent_ids(commit));
5209 			if (pid == NULL) {
5210 				got_object_commit_close(commit);
5211 				break;
5212 			}
5213 			/* Check if path history ends here. */
5214 			err = got_object_open_as_commit(&pcommit,
5215 			    s->repo, &pid->id);
5216 			if (err)
5217 				break;
5218 			err = got_object_id_by_path(&blob_id, s->repo,
5219 			    pcommit, s->path);
5220 			got_object_commit_close(pcommit);
5221 			if (err) {
5222 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5223 					err = NULL;
5224 				got_object_commit_close(commit);
5225 				break;
5226 			}
5227 			err = got_object_get_type(&obj_type, s->repo,
5228 			    blob_id);
5229 			free(blob_id);
5230 			/* Can't blame non-blob type objects. */
5231 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5232 				got_object_commit_close(commit);
5233 				break;
5234 			}
5235 			err = got_object_qid_alloc(&s->blamed_commit,
5236 			    &pid->id);
5237 			got_object_commit_close(commit);
5238 		} else {
5239 			if (got_object_id_cmp(id,
5240 			    &s->blamed_commit->id) == 0)
5241 				break;
5242 			err = got_object_qid_alloc(&s->blamed_commit,
5243 			    id);
5244 		}
5245 		if (err)
5246 			break;
5247 		s->done = 1;
5248 		thread_err = stop_blame(&s->blame);
5249 		s->done = 0;
5250 		if (thread_err)
5251 			break;
5252 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5253 		    s->blamed_commit, entry);
5254 		err = run_blame(view);
5255 		if (err)
5256 			break;
5257 		break;
5258 	}
5259 	case 'C': {
5260 		struct got_object_qid *first;
5261 
5262 		view->count = 0;
5263 		first = STAILQ_FIRST(&s->blamed_commits);
5264 		if (!got_object_id_cmp(&first->id, s->commit_id))
5265 			break;
5266 		s->done = 1;
5267 		thread_err = stop_blame(&s->blame);
5268 		s->done = 0;
5269 		if (thread_err)
5270 			break;
5271 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5272 		got_object_qid_free(s->blamed_commit);
5273 		s->blamed_commit =
5274 		    STAILQ_FIRST(&s->blamed_commits);
5275 		err = run_blame(view);
5276 		if (err)
5277 			break;
5278 		break;
5279 	}
5280 	case KEY_ENTER:
5281 	case '\r': {
5282 		struct got_object_id *id = NULL;
5283 		struct got_object_qid *pid;
5284 		struct got_commit_object *commit = NULL;
5285 
5286 		view->count = 0;
5287 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5288 		    s->first_displayed_line, s->selected_line);
5289 		if (id == NULL)
5290 			break;
5291 		err = got_object_open_as_commit(&commit, s->repo, id);
5292 		if (err)
5293 			break;
5294 		pid = STAILQ_FIRST(
5295 		    got_object_commit_get_parent_ids(commit));
5296 		if (view_is_parent_view(view))
5297 		    begin_x = view_split_begin_x(view->begin_x);
5298 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5299 		if (diff_view == NULL) {
5300 			got_object_commit_close(commit);
5301 			err = got_error_from_errno("view_open");
5302 			break;
5303 		}
5304 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5305 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5306 		got_object_commit_close(commit);
5307 		if (err) {
5308 			view_close(diff_view);
5309 			break;
5310 		}
5311 		view->focussed = 0;
5312 		diff_view->focussed = 1;
5313 		if (view_is_parent_view(view)) {
5314 			err = view_close_child(view);
5315 			if (err)
5316 				break;
5317 			err = view_set_child(view, diff_view);
5318 			if (err)
5319 				break;
5320 			view->focus_child = 1;
5321 		} else
5322 			*new_view = diff_view;
5323 		if (err)
5324 			break;
5325 		break;
5326 	}
5327 	case CTRL('d'):
5328 	case 'd':
5329 		nscroll /= 2;
5330 		/* FALL THROUGH */
5331 	case KEY_NPAGE:
5332 	case CTRL('f'):
5333 	case 'f':
5334 	case ' ':
5335 		if (s->last_displayed_line >= s->blame.nlines &&
5336 		    s->selected_line >= MIN(s->blame.nlines,
5337 		    view->nlines - 2)) {
5338 			view->count = 0;
5339 			break;
5340 		}
5341 		if (s->last_displayed_line >= s->blame.nlines &&
5342 		    s->selected_line < view->nlines - 2) {
5343 			s->selected_line +=
5344 			    MIN(nscroll, s->last_displayed_line -
5345 			    s->first_displayed_line - s->selected_line + 1);
5346 		}
5347 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5348 			s->first_displayed_line += nscroll;
5349 		else
5350 			s->first_displayed_line =
5351 			    s->blame.nlines - (view->nlines - 3);
5352 		break;
5353 	case KEY_RESIZE:
5354 		if (s->selected_line > view->nlines - 2) {
5355 			s->selected_line = MIN(s->blame.nlines,
5356 			    view->nlines - 2);
5357 		}
5358 		break;
5359 	default:
5360 		view->count = 0;
5361 		break;
5362 	}
5363 	return thread_err ? thread_err : err;
5364 }
5365 
5366 static const struct got_error *
5367 cmd_blame(int argc, char *argv[])
5368 {
5369 	const struct got_error *error;
5370 	struct got_repository *repo = NULL;
5371 	struct got_worktree *worktree = NULL;
5372 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5373 	char *link_target = NULL;
5374 	struct got_object_id *commit_id = NULL;
5375 	struct got_commit_object *commit = NULL;
5376 	char *commit_id_str = NULL;
5377 	int ch;
5378 	struct tog_view *view;
5379 	int *pack_fds = NULL;
5380 
5381 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5382 		switch (ch) {
5383 		case 'c':
5384 			commit_id_str = optarg;
5385 			break;
5386 		case 'r':
5387 			repo_path = realpath(optarg, NULL);
5388 			if (repo_path == NULL)
5389 				return got_error_from_errno2("realpath",
5390 				    optarg);
5391 			break;
5392 		default:
5393 			usage_blame();
5394 			/* NOTREACHED */
5395 		}
5396 	}
5397 
5398 	argc -= optind;
5399 	argv += optind;
5400 
5401 	if (argc != 1)
5402 		usage_blame();
5403 
5404 	error = got_repo_pack_fds_open(&pack_fds);
5405 	if (error != NULL)
5406 		goto done;
5407 
5408 	if (repo_path == NULL) {
5409 		cwd = getcwd(NULL, 0);
5410 		if (cwd == NULL)
5411 			return got_error_from_errno("getcwd");
5412 		error = got_worktree_open(&worktree, cwd);
5413 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5414 			goto done;
5415 		if (worktree)
5416 			repo_path =
5417 			    strdup(got_worktree_get_repo_path(worktree));
5418 		else
5419 			repo_path = strdup(cwd);
5420 		if (repo_path == NULL) {
5421 			error = got_error_from_errno("strdup");
5422 			goto done;
5423 		}
5424 	}
5425 
5426 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5427 	if (error != NULL)
5428 		goto done;
5429 
5430 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5431 	    worktree);
5432 	if (error)
5433 		goto done;
5434 
5435 	init_curses();
5436 
5437 	error = apply_unveil(got_repo_get_path(repo), NULL);
5438 	if (error)
5439 		goto done;
5440 
5441 	error = tog_load_refs(repo, 0);
5442 	if (error)
5443 		goto done;
5444 
5445 	if (commit_id_str == NULL) {
5446 		struct got_reference *head_ref;
5447 		error = got_ref_open(&head_ref, repo, worktree ?
5448 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5449 		if (error != NULL)
5450 			goto done;
5451 		error = got_ref_resolve(&commit_id, repo, head_ref);
5452 		got_ref_close(head_ref);
5453 	} else {
5454 		error = got_repo_match_object_id(&commit_id, NULL,
5455 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5456 	}
5457 	if (error != NULL)
5458 		goto done;
5459 
5460 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5461 	if (view == NULL) {
5462 		error = got_error_from_errno("view_open");
5463 		goto done;
5464 	}
5465 
5466 	error = got_object_open_as_commit(&commit, repo, commit_id);
5467 	if (error)
5468 		goto done;
5469 
5470 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5471 	    commit, repo);
5472 	if (error)
5473 		goto done;
5474 
5475 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5476 	    commit_id, repo);
5477 	if (error)
5478 		goto done;
5479 	if (worktree) {
5480 		/* Release work tree lock. */
5481 		got_worktree_close(worktree);
5482 		worktree = NULL;
5483 	}
5484 	error = view_loop(view);
5485 done:
5486 	free(repo_path);
5487 	free(in_repo_path);
5488 	free(link_target);
5489 	free(cwd);
5490 	free(commit_id);
5491 	if (commit)
5492 		got_object_commit_close(commit);
5493 	if (worktree)
5494 		got_worktree_close(worktree);
5495 	if (repo) {
5496 		const struct got_error *close_err = got_repo_close(repo);
5497 		if (error == NULL)
5498 			error = close_err;
5499 	}
5500 	if (pack_fds) {
5501 		const struct got_error *pack_err =
5502 		    got_repo_pack_fds_close(pack_fds);
5503 		if (error == NULL)
5504 			error = pack_err;
5505 	}
5506 	tog_free_refs();
5507 	return error;
5508 }
5509 
5510 static const struct got_error *
5511 draw_tree_entries(struct tog_view *view, const char *parent_path)
5512 {
5513 	struct tog_tree_view_state *s = &view->state.tree;
5514 	const struct got_error *err = NULL;
5515 	struct got_tree_entry *te;
5516 	wchar_t *wline;
5517 	struct tog_color *tc;
5518 	int width, n, i, nentries;
5519 	int limit = view->nlines;
5520 
5521 	s->ndisplayed = 0;
5522 
5523 	werase(view->window);
5524 
5525 	if (limit == 0)
5526 		return NULL;
5527 
5528 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5529 	    0, 0);
5530 	if (err)
5531 		return err;
5532 	if (view_needs_focus_indication(view))
5533 		wstandout(view->window);
5534 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5535 	if (tc)
5536 		wattr_on(view->window,
5537 		    COLOR_PAIR(tc->colorpair), NULL);
5538 	waddwstr(view->window, wline);
5539 	if (tc)
5540 		wattr_off(view->window,
5541 		    COLOR_PAIR(tc->colorpair), NULL);
5542 	if (view_needs_focus_indication(view))
5543 		wstandend(view->window);
5544 	free(wline);
5545 	wline = NULL;
5546 	if (width < view->ncols - 1)
5547 		waddch(view->window, '\n');
5548 	if (--limit <= 0)
5549 		return NULL;
5550 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5551 	    0, 0);
5552 	if (err)
5553 		return err;
5554 	waddwstr(view->window, wline);
5555 	free(wline);
5556 	wline = NULL;
5557 	if (width < view->ncols - 1)
5558 		waddch(view->window, '\n');
5559 	if (--limit <= 0)
5560 		return NULL;
5561 	waddch(view->window, '\n');
5562 	if (--limit <= 0)
5563 		return NULL;
5564 
5565 	if (s->first_displayed_entry == NULL) {
5566 		te = got_object_tree_get_first_entry(s->tree);
5567 		if (s->selected == 0) {
5568 			if (view->focussed)
5569 				wstandout(view->window);
5570 			s->selected_entry = NULL;
5571 		}
5572 		waddstr(view->window, "  ..\n");	/* parent directory */
5573 		if (s->selected == 0 && view->focussed)
5574 			wstandend(view->window);
5575 		s->ndisplayed++;
5576 		if (--limit <= 0)
5577 			return NULL;
5578 		n = 1;
5579 	} else {
5580 		n = 0;
5581 		te = s->first_displayed_entry;
5582 	}
5583 
5584 	nentries = got_object_tree_get_nentries(s->tree);
5585 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5586 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5587 		const char *modestr = "";
5588 		mode_t mode;
5589 
5590 		te = got_object_tree_get_entry(s->tree, i);
5591 		mode = got_tree_entry_get_mode(te);
5592 
5593 		if (s->show_ids) {
5594 			err = got_object_id_str(&id_str,
5595 			    got_tree_entry_get_id(te));
5596 			if (err)
5597 				return got_error_from_errno(
5598 				    "got_object_id_str");
5599 		}
5600 		if (got_object_tree_entry_is_submodule(te))
5601 			modestr = "$";
5602 		else if (S_ISLNK(mode)) {
5603 			int i;
5604 
5605 			err = got_tree_entry_get_symlink_target(&link_target,
5606 			    te, s->repo);
5607 			if (err) {
5608 				free(id_str);
5609 				return err;
5610 			}
5611 			for (i = 0; i < strlen(link_target); i++) {
5612 				if (!isprint((unsigned char)link_target[i]))
5613 					link_target[i] = '?';
5614 			}
5615 			modestr = "@";
5616 		}
5617 		else if (S_ISDIR(mode))
5618 			modestr = "/";
5619 		else if (mode & S_IXUSR)
5620 			modestr = "*";
5621 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5622 		    got_tree_entry_get_name(te), modestr,
5623 		    link_target ? " -> ": "",
5624 		    link_target ? link_target : "") == -1) {
5625 			free(id_str);
5626 			free(link_target);
5627 			return got_error_from_errno("asprintf");
5628 		}
5629 		free(id_str);
5630 		free(link_target);
5631 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5632 		    0, 0);
5633 		if (err) {
5634 			free(line);
5635 			break;
5636 		}
5637 		if (n == s->selected) {
5638 			if (view->focussed)
5639 				wstandout(view->window);
5640 			s->selected_entry = te;
5641 		}
5642 		tc = match_color(&s->colors, line);
5643 		if (tc)
5644 			wattr_on(view->window,
5645 			    COLOR_PAIR(tc->colorpair), NULL);
5646 		waddwstr(view->window, wline);
5647 		if (tc)
5648 			wattr_off(view->window,
5649 			    COLOR_PAIR(tc->colorpair), NULL);
5650 		if (width < view->ncols - 1)
5651 			waddch(view->window, '\n');
5652 		if (n == s->selected && view->focussed)
5653 			wstandend(view->window);
5654 		free(line);
5655 		free(wline);
5656 		wline = NULL;
5657 		n++;
5658 		s->ndisplayed++;
5659 		s->last_displayed_entry = te;
5660 		if (--limit <= 0)
5661 			break;
5662 	}
5663 
5664 	return err;
5665 }
5666 
5667 static void
5668 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5669 {
5670 	struct got_tree_entry *te;
5671 	int isroot = s->tree == s->root;
5672 	int i = 0;
5673 
5674 	if (s->first_displayed_entry == NULL)
5675 		return;
5676 
5677 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5678 	while (i++ < maxscroll) {
5679 		if (te == NULL) {
5680 			if (!isroot)
5681 				s->first_displayed_entry = NULL;
5682 			break;
5683 		}
5684 		s->first_displayed_entry = te;
5685 		te = got_tree_entry_get_prev(s->tree, te);
5686 	}
5687 }
5688 
5689 static void
5690 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5691 {
5692 	struct got_tree_entry *next, *last;
5693 	int n = 0;
5694 
5695 	if (s->first_displayed_entry)
5696 		next = got_tree_entry_get_next(s->tree,
5697 		    s->first_displayed_entry);
5698 	else
5699 		next = got_object_tree_get_first_entry(s->tree);
5700 
5701 	last = s->last_displayed_entry;
5702 	while (next && last && n++ < maxscroll) {
5703 		last = got_tree_entry_get_next(s->tree, last);
5704 		if (last) {
5705 			s->first_displayed_entry = next;
5706 			next = got_tree_entry_get_next(s->tree, next);
5707 		}
5708 	}
5709 }
5710 
5711 static const struct got_error *
5712 tree_entry_path(char **path, struct tog_parent_trees *parents,
5713     struct got_tree_entry *te)
5714 {
5715 	const struct got_error *err = NULL;
5716 	struct tog_parent_tree *pt;
5717 	size_t len = 2; /* for leading slash and NUL */
5718 
5719 	TAILQ_FOREACH(pt, parents, entry)
5720 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5721 		    + 1 /* slash */;
5722 	if (te)
5723 		len += strlen(got_tree_entry_get_name(te));
5724 
5725 	*path = calloc(1, len);
5726 	if (path == NULL)
5727 		return got_error_from_errno("calloc");
5728 
5729 	(*path)[0] = '/';
5730 	pt = TAILQ_LAST(parents, tog_parent_trees);
5731 	while (pt) {
5732 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5733 		if (strlcat(*path, name, len) >= len) {
5734 			err = got_error(GOT_ERR_NO_SPACE);
5735 			goto done;
5736 		}
5737 		if (strlcat(*path, "/", len) >= len) {
5738 			err = got_error(GOT_ERR_NO_SPACE);
5739 			goto done;
5740 		}
5741 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5742 	}
5743 	if (te) {
5744 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5745 			err = got_error(GOT_ERR_NO_SPACE);
5746 			goto done;
5747 		}
5748 	}
5749 done:
5750 	if (err) {
5751 		free(*path);
5752 		*path = NULL;
5753 	}
5754 	return err;
5755 }
5756 
5757 static const struct got_error *
5758 blame_tree_entry(struct tog_view **new_view, int begin_x,
5759     struct got_tree_entry *te, struct tog_parent_trees *parents,
5760     struct got_object_id *commit_id, struct got_repository *repo)
5761 {
5762 	const struct got_error *err = NULL;
5763 	char *path;
5764 	struct tog_view *blame_view;
5765 
5766 	*new_view = NULL;
5767 
5768 	err = tree_entry_path(&path, parents, te);
5769 	if (err)
5770 		return err;
5771 
5772 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5773 	if (blame_view == NULL) {
5774 		err = got_error_from_errno("view_open");
5775 		goto done;
5776 	}
5777 
5778 	err = open_blame_view(blame_view, path, commit_id, repo);
5779 	if (err) {
5780 		if (err->code == GOT_ERR_CANCELLED)
5781 			err = NULL;
5782 		view_close(blame_view);
5783 	} else
5784 		*new_view = blame_view;
5785 done:
5786 	free(path);
5787 	return err;
5788 }
5789 
5790 static const struct got_error *
5791 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5792     struct tog_tree_view_state *s)
5793 {
5794 	struct tog_view *log_view;
5795 	const struct got_error *err = NULL;
5796 	char *path;
5797 
5798 	*new_view = NULL;
5799 
5800 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5801 	if (log_view == NULL)
5802 		return got_error_from_errno("view_open");
5803 
5804 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5805 	if (err)
5806 		return err;
5807 
5808 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5809 	    path, 0);
5810 	if (err)
5811 		view_close(log_view);
5812 	else
5813 		*new_view = log_view;
5814 	free(path);
5815 	return err;
5816 }
5817 
5818 static const struct got_error *
5819 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5820     const char *head_ref_name, struct got_repository *repo)
5821 {
5822 	const struct got_error *err = NULL;
5823 	char *commit_id_str = NULL;
5824 	struct tog_tree_view_state *s = &view->state.tree;
5825 	struct got_commit_object *commit = NULL;
5826 
5827 	TAILQ_INIT(&s->parents);
5828 	STAILQ_INIT(&s->colors);
5829 
5830 	s->commit_id = got_object_id_dup(commit_id);
5831 	if (s->commit_id == NULL)
5832 		return got_error_from_errno("got_object_id_dup");
5833 
5834 	err = got_object_open_as_commit(&commit, repo, commit_id);
5835 	if (err)
5836 		goto done;
5837 
5838 	/*
5839 	 * The root is opened here and will be closed when the view is closed.
5840 	 * Any visited subtrees and their path-wise parents are opened and
5841 	 * closed on demand.
5842 	 */
5843 	err = got_object_open_as_tree(&s->root, repo,
5844 	    got_object_commit_get_tree_id(commit));
5845 	if (err)
5846 		goto done;
5847 	s->tree = s->root;
5848 
5849 	err = got_object_id_str(&commit_id_str, commit_id);
5850 	if (err != NULL)
5851 		goto done;
5852 
5853 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5854 		err = got_error_from_errno("asprintf");
5855 		goto done;
5856 	}
5857 
5858 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5859 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5860 	if (head_ref_name) {
5861 		s->head_ref_name = strdup(head_ref_name);
5862 		if (s->head_ref_name == NULL) {
5863 			err = got_error_from_errno("strdup");
5864 			goto done;
5865 		}
5866 	}
5867 	s->repo = repo;
5868 
5869 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5870 		err = add_color(&s->colors, "\\$$",
5871 		    TOG_COLOR_TREE_SUBMODULE,
5872 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5873 		if (err)
5874 			goto done;
5875 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5876 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5877 		if (err)
5878 			goto done;
5879 		err = add_color(&s->colors, "/$",
5880 		    TOG_COLOR_TREE_DIRECTORY,
5881 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5882 		if (err)
5883 			goto done;
5884 
5885 		err = add_color(&s->colors, "\\*$",
5886 		    TOG_COLOR_TREE_EXECUTABLE,
5887 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5888 		if (err)
5889 			goto done;
5890 
5891 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5892 		    get_color_value("TOG_COLOR_COMMIT"));
5893 		if (err)
5894 			goto done;
5895 	}
5896 
5897 	view->show = show_tree_view;
5898 	view->input = input_tree_view;
5899 	view->close = close_tree_view;
5900 	view->search_start = search_start_tree_view;
5901 	view->search_next = search_next_tree_view;
5902 done:
5903 	free(commit_id_str);
5904 	if (commit)
5905 		got_object_commit_close(commit);
5906 	if (err)
5907 		close_tree_view(view);
5908 	return err;
5909 }
5910 
5911 static const struct got_error *
5912 close_tree_view(struct tog_view *view)
5913 {
5914 	struct tog_tree_view_state *s = &view->state.tree;
5915 
5916 	free_colors(&s->colors);
5917 	free(s->tree_label);
5918 	s->tree_label = NULL;
5919 	free(s->commit_id);
5920 	s->commit_id = NULL;
5921 	free(s->head_ref_name);
5922 	s->head_ref_name = NULL;
5923 	while (!TAILQ_EMPTY(&s->parents)) {
5924 		struct tog_parent_tree *parent;
5925 		parent = TAILQ_FIRST(&s->parents);
5926 		TAILQ_REMOVE(&s->parents, parent, entry);
5927 		if (parent->tree != s->root)
5928 			got_object_tree_close(parent->tree);
5929 		free(parent);
5930 
5931 	}
5932 	if (s->tree != NULL && s->tree != s->root)
5933 		got_object_tree_close(s->tree);
5934 	if (s->root)
5935 		got_object_tree_close(s->root);
5936 	return NULL;
5937 }
5938 
5939 static const struct got_error *
5940 search_start_tree_view(struct tog_view *view)
5941 {
5942 	struct tog_tree_view_state *s = &view->state.tree;
5943 
5944 	s->matched_entry = NULL;
5945 	return NULL;
5946 }
5947 
5948 static int
5949 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5950 {
5951 	regmatch_t regmatch;
5952 
5953 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5954 	    0) == 0;
5955 }
5956 
5957 static const struct got_error *
5958 search_next_tree_view(struct tog_view *view)
5959 {
5960 	struct tog_tree_view_state *s = &view->state.tree;
5961 	struct got_tree_entry *te = NULL;
5962 
5963 	if (!view->searching) {
5964 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5965 		return NULL;
5966 	}
5967 
5968 	if (s->matched_entry) {
5969 		if (view->searching == TOG_SEARCH_FORWARD) {
5970 			if (s->selected_entry)
5971 				te = got_tree_entry_get_next(s->tree,
5972 				    s->selected_entry);
5973 			else
5974 				te = got_object_tree_get_first_entry(s->tree);
5975 		} else {
5976 			if (s->selected_entry == NULL)
5977 				te = got_object_tree_get_last_entry(s->tree);
5978 			else
5979 				te = got_tree_entry_get_prev(s->tree,
5980 				    s->selected_entry);
5981 		}
5982 	} else {
5983 		if (s->selected_entry)
5984 			te = s->selected_entry;
5985 		else if (view->searching == TOG_SEARCH_FORWARD)
5986 			te = got_object_tree_get_first_entry(s->tree);
5987 		else
5988 			te = got_object_tree_get_last_entry(s->tree);
5989 	}
5990 
5991 	while (1) {
5992 		if (te == NULL) {
5993 			if (s->matched_entry == NULL) {
5994 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5995 				return NULL;
5996 			}
5997 			if (view->searching == TOG_SEARCH_FORWARD)
5998 				te = got_object_tree_get_first_entry(s->tree);
5999 			else
6000 				te = got_object_tree_get_last_entry(s->tree);
6001 		}
6002 
6003 		if (match_tree_entry(te, &view->regex)) {
6004 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6005 			s->matched_entry = te;
6006 			break;
6007 		}
6008 
6009 		if (view->searching == TOG_SEARCH_FORWARD)
6010 			te = got_tree_entry_get_next(s->tree, te);
6011 		else
6012 			te = got_tree_entry_get_prev(s->tree, te);
6013 	}
6014 
6015 	if (s->matched_entry) {
6016 		s->first_displayed_entry = s->matched_entry;
6017 		s->selected = 0;
6018 	}
6019 
6020 	return NULL;
6021 }
6022 
6023 static const struct got_error *
6024 show_tree_view(struct tog_view *view)
6025 {
6026 	const struct got_error *err = NULL;
6027 	struct tog_tree_view_state *s = &view->state.tree;
6028 	char *parent_path;
6029 
6030 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6031 	if (err)
6032 		return err;
6033 
6034 	err = draw_tree_entries(view, parent_path);
6035 	free(parent_path);
6036 
6037 	view_vborder(view);
6038 	return err;
6039 }
6040 
6041 static const struct got_error *
6042 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6043 {
6044 	const struct got_error *err = NULL;
6045 	struct tog_tree_view_state *s = &view->state.tree;
6046 	struct tog_view *log_view, *ref_view;
6047 	struct got_tree_entry *te;
6048 	int begin_x = 0, n, nscroll = view->nlines - 3;
6049 
6050 	switch (ch) {
6051 	case 'i':
6052 		s->show_ids = !s->show_ids;
6053 		view->count = 0;
6054 		break;
6055 	case 'l':
6056 		view->count = 0;
6057 		if (!s->selected_entry)
6058 			break;
6059 		if (view_is_parent_view(view))
6060 			begin_x = view_split_begin_x(view->begin_x);
6061 		err = log_selected_tree_entry(&log_view, begin_x, s);
6062 		view->focussed = 0;
6063 		log_view->focussed = 1;
6064 		if (view_is_parent_view(view)) {
6065 			err = view_close_child(view);
6066 			if (err)
6067 				return err;
6068 			err = view_set_child(view, log_view);
6069 			if (err)
6070 				return err;
6071 			view->focus_child = 1;
6072 		} else
6073 			*new_view = log_view;
6074 		break;
6075 	case 'r':
6076 		view->count = 0;
6077 		if (view_is_parent_view(view))
6078 			begin_x = view_split_begin_x(view->begin_x);
6079 		ref_view = view_open(view->nlines, view->ncols,
6080 		    view->begin_y, begin_x, TOG_VIEW_REF);
6081 		if (ref_view == NULL)
6082 			return got_error_from_errno("view_open");
6083 		err = open_ref_view(ref_view, s->repo);
6084 		if (err) {
6085 			view_close(ref_view);
6086 			return err;
6087 		}
6088 		view->focussed = 0;
6089 		ref_view->focussed = 1;
6090 		if (view_is_parent_view(view)) {
6091 			err = view_close_child(view);
6092 			if (err)
6093 				return err;
6094 			err = view_set_child(view, ref_view);
6095 			if (err)
6096 				return err;
6097 			view->focus_child = 1;
6098 		} else
6099 			*new_view = ref_view;
6100 		break;
6101 	case 'g':
6102 	case KEY_HOME:
6103 		s->selected = 0;
6104 		view->count = 0;
6105 		if (s->tree == s->root)
6106 			s->first_displayed_entry =
6107 			    got_object_tree_get_first_entry(s->tree);
6108 		else
6109 			s->first_displayed_entry = NULL;
6110 		break;
6111 	case 'G':
6112 	case KEY_END:
6113 		s->selected = 0;
6114 		view->count = 0;
6115 		te = got_object_tree_get_last_entry(s->tree);
6116 		for (n = 0; n < view->nlines - 3; n++) {
6117 			if (te == NULL) {
6118 				if(s->tree != s->root) {
6119 					s->first_displayed_entry = NULL;
6120 					n++;
6121 				}
6122 				break;
6123 			}
6124 			s->first_displayed_entry = te;
6125 			te = got_tree_entry_get_prev(s->tree, te);
6126 		}
6127 		if (n > 0)
6128 			s->selected = n - 1;
6129 		break;
6130 	case 'k':
6131 	case KEY_UP:
6132 	case CTRL('p'):
6133 		if (s->selected > 0) {
6134 			s->selected--;
6135 			break;
6136 		}
6137 		tree_scroll_up(s, 1);
6138 		if (s->selected_entry == NULL ||
6139 		    (s->tree == s->root && s->selected_entry ==
6140 		     got_object_tree_get_first_entry(s->tree)))
6141 			view->count = 0;
6142 		break;
6143 	case CTRL('u'):
6144 	case 'u':
6145 		nscroll /= 2;
6146 		/* FALL THROUGH */
6147 	case KEY_PPAGE:
6148 	case CTRL('b'):
6149 	case 'b':
6150 		if (s->tree == s->root) {
6151 			if (got_object_tree_get_first_entry(s->tree) ==
6152 			    s->first_displayed_entry)
6153 				s->selected -= MIN(s->selected, nscroll);
6154 		} else {
6155 			if (s->first_displayed_entry == NULL)
6156 				s->selected -= MIN(s->selected, nscroll);
6157 		}
6158 		tree_scroll_up(s, MAX(0, nscroll));
6159 		if (s->selected_entry == NULL ||
6160 		    (s->tree == s->root && s->selected_entry ==
6161 		     got_object_tree_get_first_entry(s->tree)))
6162 			view->count = 0;
6163 		break;
6164 	case 'j':
6165 	case KEY_DOWN:
6166 	case CTRL('n'):
6167 		if (s->selected < s->ndisplayed - 1) {
6168 			s->selected++;
6169 			break;
6170 		}
6171 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
6172 		    == NULL) {
6173 			/* can't scroll any further */
6174 			view->count = 0;
6175 			break;
6176 		}
6177 		tree_scroll_down(s, 1);
6178 		break;
6179 	case CTRL('d'):
6180 	case 'd':
6181 		nscroll /= 2;
6182 		/* FALL THROUGH */
6183 	case KEY_NPAGE:
6184 	case CTRL('f'):
6185 	case 'f':
6186 	case ' ':
6187 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
6188 		    == NULL) {
6189 			/* can't scroll any further; move cursor down */
6190 			if (s->selected < s->ndisplayed - 1)
6191 				s->selected += MIN(nscroll,
6192 				    s->ndisplayed - s->selected - 1);
6193 			else
6194 				view->count = 0;
6195 			break;
6196 		}
6197 		tree_scroll_down(s, nscroll);
6198 		break;
6199 	case KEY_ENTER:
6200 	case '\r':
6201 	case KEY_BACKSPACE:
6202 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
6203 			struct tog_parent_tree *parent;
6204 			/* user selected '..' */
6205 			if (s->tree == s->root) {
6206 				view->count = 0;
6207 				break;
6208 			}
6209 			parent = TAILQ_FIRST(&s->parents);
6210 			TAILQ_REMOVE(&s->parents, parent,
6211 			    entry);
6212 			got_object_tree_close(s->tree);
6213 			s->tree = parent->tree;
6214 			s->first_displayed_entry =
6215 			    parent->first_displayed_entry;
6216 			s->selected_entry =
6217 			    parent->selected_entry;
6218 			s->selected = parent->selected;
6219 			free(parent);
6220 		} else if (S_ISDIR(got_tree_entry_get_mode(
6221 		    s->selected_entry))) {
6222 			struct got_tree_object *subtree;
6223 			view->count = 0;
6224 			err = got_object_open_as_tree(&subtree, s->repo,
6225 			    got_tree_entry_get_id(s->selected_entry));
6226 			if (err)
6227 				break;
6228 			err = tree_view_visit_subtree(s, subtree);
6229 			if (err) {
6230 				got_object_tree_close(subtree);
6231 				break;
6232 			}
6233 		} else if (S_ISREG(got_tree_entry_get_mode(
6234 		    s->selected_entry))) {
6235 			struct tog_view *blame_view;
6236 			int begin_x = view_is_parent_view(view) ?
6237 			    view_split_begin_x(view->begin_x) : 0;
6238 
6239 			err = blame_tree_entry(&blame_view, begin_x,
6240 			    s->selected_entry, &s->parents,
6241 			    s->commit_id, s->repo);
6242 			if (err)
6243 				break;
6244 			view->count = 0;
6245 			view->focussed = 0;
6246 			blame_view->focussed = 1;
6247 			if (view_is_parent_view(view)) {
6248 				err = view_close_child(view);
6249 				if (err)
6250 					return err;
6251 				err = view_set_child(view, blame_view);
6252 				if (err)
6253 					return err;
6254 				view->focus_child = 1;
6255 			} else
6256 				*new_view = blame_view;
6257 		}
6258 		break;
6259 	case KEY_RESIZE:
6260 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6261 			s->selected = view->nlines - 4;
6262 		view->count = 0;
6263 		break;
6264 	default:
6265 		view->count = 0;
6266 		break;
6267 	}
6268 
6269 	return err;
6270 }
6271 
6272 __dead static void
6273 usage_tree(void)
6274 {
6275 	endwin();
6276 	fprintf(stderr,
6277 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6278 	    getprogname());
6279 	exit(1);
6280 }
6281 
6282 static const struct got_error *
6283 cmd_tree(int argc, char *argv[])
6284 {
6285 	const struct got_error *error;
6286 	struct got_repository *repo = NULL;
6287 	struct got_worktree *worktree = NULL;
6288 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6289 	struct got_object_id *commit_id = NULL;
6290 	struct got_commit_object *commit = NULL;
6291 	const char *commit_id_arg = NULL;
6292 	char *label = NULL;
6293 	struct got_reference *ref = NULL;
6294 	const char *head_ref_name = NULL;
6295 	int ch;
6296 	struct tog_view *view;
6297 	int *pack_fds = NULL;
6298 
6299 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6300 		switch (ch) {
6301 		case 'c':
6302 			commit_id_arg = optarg;
6303 			break;
6304 		case 'r':
6305 			repo_path = realpath(optarg, NULL);
6306 			if (repo_path == NULL)
6307 				return got_error_from_errno2("realpath",
6308 				    optarg);
6309 			break;
6310 		default:
6311 			usage_tree();
6312 			/* NOTREACHED */
6313 		}
6314 	}
6315 
6316 	argc -= optind;
6317 	argv += optind;
6318 
6319 	if (argc > 1)
6320 		usage_tree();
6321 
6322 	error = got_repo_pack_fds_open(&pack_fds);
6323 	if (error != NULL)
6324 		goto done;
6325 
6326 	if (repo_path == NULL) {
6327 		cwd = getcwd(NULL, 0);
6328 		if (cwd == NULL)
6329 			return got_error_from_errno("getcwd");
6330 		error = got_worktree_open(&worktree, cwd);
6331 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6332 			goto done;
6333 		if (worktree)
6334 			repo_path =
6335 			    strdup(got_worktree_get_repo_path(worktree));
6336 		else
6337 			repo_path = strdup(cwd);
6338 		if (repo_path == NULL) {
6339 			error = got_error_from_errno("strdup");
6340 			goto done;
6341 		}
6342 	}
6343 
6344 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6345 	if (error != NULL)
6346 		goto done;
6347 
6348 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6349 	    repo, worktree);
6350 	if (error)
6351 		goto done;
6352 
6353 	init_curses();
6354 
6355 	error = apply_unveil(got_repo_get_path(repo), NULL);
6356 	if (error)
6357 		goto done;
6358 
6359 	error = tog_load_refs(repo, 0);
6360 	if (error)
6361 		goto done;
6362 
6363 	if (commit_id_arg == NULL) {
6364 		error = got_repo_match_object_id(&commit_id, &label,
6365 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6366 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6367 		if (error)
6368 			goto done;
6369 		head_ref_name = label;
6370 	} else {
6371 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6372 		if (error == NULL)
6373 			head_ref_name = got_ref_get_name(ref);
6374 		else if (error->code != GOT_ERR_NOT_REF)
6375 			goto done;
6376 		error = got_repo_match_object_id(&commit_id, NULL,
6377 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6378 		if (error)
6379 			goto done;
6380 	}
6381 
6382 	error = got_object_open_as_commit(&commit, repo, commit_id);
6383 	if (error)
6384 		goto done;
6385 
6386 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6387 	if (view == NULL) {
6388 		error = got_error_from_errno("view_open");
6389 		goto done;
6390 	}
6391 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6392 	if (error)
6393 		goto done;
6394 	if (!got_path_is_root_dir(in_repo_path)) {
6395 		error = tree_view_walk_path(&view->state.tree, commit,
6396 		    in_repo_path);
6397 		if (error)
6398 			goto done;
6399 	}
6400 
6401 	if (worktree) {
6402 		/* Release work tree lock. */
6403 		got_worktree_close(worktree);
6404 		worktree = NULL;
6405 	}
6406 	error = view_loop(view);
6407 done:
6408 	free(repo_path);
6409 	free(cwd);
6410 	free(commit_id);
6411 	free(label);
6412 	if (ref)
6413 		got_ref_close(ref);
6414 	if (repo) {
6415 		const struct got_error *close_err = got_repo_close(repo);
6416 		if (error == NULL)
6417 			error = close_err;
6418 	}
6419 	if (pack_fds) {
6420 		const struct got_error *pack_err =
6421 		    got_repo_pack_fds_close(pack_fds);
6422 		if (error == NULL)
6423 			error = pack_err;
6424 	}
6425 	tog_free_refs();
6426 	return error;
6427 }
6428 
6429 static const struct got_error *
6430 ref_view_load_refs(struct tog_ref_view_state *s)
6431 {
6432 	struct got_reflist_entry *sre;
6433 	struct tog_reflist_entry *re;
6434 
6435 	s->nrefs = 0;
6436 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6437 		if (strncmp(got_ref_get_name(sre->ref),
6438 		    "refs/got/", 9) == 0 &&
6439 		    strncmp(got_ref_get_name(sre->ref),
6440 		    "refs/got/backup/", 16) != 0)
6441 			continue;
6442 
6443 		re = malloc(sizeof(*re));
6444 		if (re == NULL)
6445 			return got_error_from_errno("malloc");
6446 
6447 		re->ref = got_ref_dup(sre->ref);
6448 		if (re->ref == NULL)
6449 			return got_error_from_errno("got_ref_dup");
6450 		re->idx = s->nrefs++;
6451 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6452 	}
6453 
6454 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6455 	return NULL;
6456 }
6457 
6458 static void
6459 ref_view_free_refs(struct tog_ref_view_state *s)
6460 {
6461 	struct tog_reflist_entry *re;
6462 
6463 	while (!TAILQ_EMPTY(&s->refs)) {
6464 		re = TAILQ_FIRST(&s->refs);
6465 		TAILQ_REMOVE(&s->refs, re, entry);
6466 		got_ref_close(re->ref);
6467 		free(re);
6468 	}
6469 }
6470 
6471 static const struct got_error *
6472 open_ref_view(struct tog_view *view, struct got_repository *repo)
6473 {
6474 	const struct got_error *err = NULL;
6475 	struct tog_ref_view_state *s = &view->state.ref;
6476 
6477 	s->selected_entry = 0;
6478 	s->repo = repo;
6479 
6480 	TAILQ_INIT(&s->refs);
6481 	STAILQ_INIT(&s->colors);
6482 
6483 	err = ref_view_load_refs(s);
6484 	if (err)
6485 		return err;
6486 
6487 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6488 		err = add_color(&s->colors, "^refs/heads/",
6489 		    TOG_COLOR_REFS_HEADS,
6490 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6491 		if (err)
6492 			goto done;
6493 
6494 		err = add_color(&s->colors, "^refs/tags/",
6495 		    TOG_COLOR_REFS_TAGS,
6496 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6497 		if (err)
6498 			goto done;
6499 
6500 		err = add_color(&s->colors, "^refs/remotes/",
6501 		    TOG_COLOR_REFS_REMOTES,
6502 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6503 		if (err)
6504 			goto done;
6505 
6506 		err = add_color(&s->colors, "^refs/got/backup/",
6507 		    TOG_COLOR_REFS_BACKUP,
6508 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6509 		if (err)
6510 			goto done;
6511 	}
6512 
6513 	view->show = show_ref_view;
6514 	view->input = input_ref_view;
6515 	view->close = close_ref_view;
6516 	view->search_start = search_start_ref_view;
6517 	view->search_next = search_next_ref_view;
6518 done:
6519 	if (err)
6520 		free_colors(&s->colors);
6521 	return err;
6522 }
6523 
6524 static const struct got_error *
6525 close_ref_view(struct tog_view *view)
6526 {
6527 	struct tog_ref_view_state *s = &view->state.ref;
6528 
6529 	ref_view_free_refs(s);
6530 	free_colors(&s->colors);
6531 
6532 	return NULL;
6533 }
6534 
6535 static const struct got_error *
6536 resolve_reflist_entry(struct got_object_id **commit_id,
6537     struct tog_reflist_entry *re, struct got_repository *repo)
6538 {
6539 	const struct got_error *err = NULL;
6540 	struct got_object_id *obj_id;
6541 	struct got_tag_object *tag = NULL;
6542 	int obj_type;
6543 
6544 	*commit_id = NULL;
6545 
6546 	err = got_ref_resolve(&obj_id, repo, re->ref);
6547 	if (err)
6548 		return err;
6549 
6550 	err = got_object_get_type(&obj_type, repo, obj_id);
6551 	if (err)
6552 		goto done;
6553 
6554 	switch (obj_type) {
6555 	case GOT_OBJ_TYPE_COMMIT:
6556 		*commit_id = obj_id;
6557 		break;
6558 	case GOT_OBJ_TYPE_TAG:
6559 		err = got_object_open_as_tag(&tag, repo, obj_id);
6560 		if (err)
6561 			goto done;
6562 		free(obj_id);
6563 		err = got_object_get_type(&obj_type, repo,
6564 		    got_object_tag_get_object_id(tag));
6565 		if (err)
6566 			goto done;
6567 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6568 			err = got_error(GOT_ERR_OBJ_TYPE);
6569 			goto done;
6570 		}
6571 		*commit_id = got_object_id_dup(
6572 		    got_object_tag_get_object_id(tag));
6573 		if (*commit_id == NULL) {
6574 			err = got_error_from_errno("got_object_id_dup");
6575 			goto done;
6576 		}
6577 		break;
6578 	default:
6579 		err = got_error(GOT_ERR_OBJ_TYPE);
6580 		break;
6581 	}
6582 
6583 done:
6584 	if (tag)
6585 		got_object_tag_close(tag);
6586 	if (err) {
6587 		free(*commit_id);
6588 		*commit_id = NULL;
6589 	}
6590 	return err;
6591 }
6592 
6593 static const struct got_error *
6594 log_ref_entry(struct tog_view **new_view, int begin_x,
6595     struct tog_reflist_entry *re, struct got_repository *repo)
6596 {
6597 	struct tog_view *log_view;
6598 	const struct got_error *err = NULL;
6599 	struct got_object_id *commit_id = NULL;
6600 
6601 	*new_view = NULL;
6602 
6603 	err = resolve_reflist_entry(&commit_id, re, repo);
6604 	if (err) {
6605 		if (err->code != GOT_ERR_OBJ_TYPE)
6606 			return err;
6607 		else
6608 			return NULL;
6609 	}
6610 
6611 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6612 	if (log_view == NULL) {
6613 		err = got_error_from_errno("view_open");
6614 		goto done;
6615 	}
6616 
6617 	err = open_log_view(log_view, commit_id, repo,
6618 	    got_ref_get_name(re->ref), "", 0);
6619 done:
6620 	if (err)
6621 		view_close(log_view);
6622 	else
6623 		*new_view = log_view;
6624 	free(commit_id);
6625 	return err;
6626 }
6627 
6628 static void
6629 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6630 {
6631 	struct tog_reflist_entry *re;
6632 	int i = 0;
6633 
6634 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6635 		return;
6636 
6637 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6638 	while (i++ < maxscroll) {
6639 		if (re == NULL)
6640 			break;
6641 		s->first_displayed_entry = re;
6642 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6643 	}
6644 }
6645 
6646 static void
6647 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6648 {
6649 	struct tog_reflist_entry *next, *last;
6650 	int n = 0;
6651 
6652 	if (s->first_displayed_entry)
6653 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6654 	else
6655 		next = TAILQ_FIRST(&s->refs);
6656 
6657 	last = s->last_displayed_entry;
6658 	while (next && last && n++ < maxscroll) {
6659 		last = TAILQ_NEXT(last, entry);
6660 		if (last) {
6661 			s->first_displayed_entry = next;
6662 			next = TAILQ_NEXT(next, entry);
6663 		}
6664 	}
6665 }
6666 
6667 static const struct got_error *
6668 search_start_ref_view(struct tog_view *view)
6669 {
6670 	struct tog_ref_view_state *s = &view->state.ref;
6671 
6672 	s->matched_entry = NULL;
6673 	return NULL;
6674 }
6675 
6676 static int
6677 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6678 {
6679 	regmatch_t regmatch;
6680 
6681 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6682 	    0) == 0;
6683 }
6684 
6685 static const struct got_error *
6686 search_next_ref_view(struct tog_view *view)
6687 {
6688 	struct tog_ref_view_state *s = &view->state.ref;
6689 	struct tog_reflist_entry *re = NULL;
6690 
6691 	if (!view->searching) {
6692 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6693 		return NULL;
6694 	}
6695 
6696 	if (s->matched_entry) {
6697 		if (view->searching == TOG_SEARCH_FORWARD) {
6698 			if (s->selected_entry)
6699 				re = TAILQ_NEXT(s->selected_entry, entry);
6700 			else
6701 				re = TAILQ_PREV(s->selected_entry,
6702 				    tog_reflist_head, entry);
6703 		} else {
6704 			if (s->selected_entry == NULL)
6705 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6706 			else
6707 				re = TAILQ_PREV(s->selected_entry,
6708 				    tog_reflist_head, entry);
6709 		}
6710 	} else {
6711 		if (s->selected_entry)
6712 			re = s->selected_entry;
6713 		else if (view->searching == TOG_SEARCH_FORWARD)
6714 			re = TAILQ_FIRST(&s->refs);
6715 		else
6716 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6717 	}
6718 
6719 	while (1) {
6720 		if (re == NULL) {
6721 			if (s->matched_entry == NULL) {
6722 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6723 				return NULL;
6724 			}
6725 			if (view->searching == TOG_SEARCH_FORWARD)
6726 				re = TAILQ_FIRST(&s->refs);
6727 			else
6728 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6729 		}
6730 
6731 		if (match_reflist_entry(re, &view->regex)) {
6732 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6733 			s->matched_entry = re;
6734 			break;
6735 		}
6736 
6737 		if (view->searching == TOG_SEARCH_FORWARD)
6738 			re = TAILQ_NEXT(re, entry);
6739 		else
6740 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6741 	}
6742 
6743 	if (s->matched_entry) {
6744 		s->first_displayed_entry = s->matched_entry;
6745 		s->selected = 0;
6746 	}
6747 
6748 	return NULL;
6749 }
6750 
6751 static const struct got_error *
6752 show_ref_view(struct tog_view *view)
6753 {
6754 	const struct got_error *err = NULL;
6755 	struct tog_ref_view_state *s = &view->state.ref;
6756 	struct tog_reflist_entry *re;
6757 	char *line = NULL;
6758 	wchar_t *wline;
6759 	struct tog_color *tc;
6760 	int width, n;
6761 	int limit = view->nlines;
6762 
6763 	werase(view->window);
6764 
6765 	s->ndisplayed = 0;
6766 
6767 	if (limit == 0)
6768 		return NULL;
6769 
6770 	re = s->first_displayed_entry;
6771 
6772 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6773 	    s->nrefs) == -1)
6774 		return got_error_from_errno("asprintf");
6775 
6776 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6777 	if (err) {
6778 		free(line);
6779 		return err;
6780 	}
6781 	if (view_needs_focus_indication(view))
6782 		wstandout(view->window);
6783 	waddwstr(view->window, wline);
6784 	if (view_needs_focus_indication(view))
6785 		wstandend(view->window);
6786 	free(wline);
6787 	wline = NULL;
6788 	free(line);
6789 	line = NULL;
6790 	if (width < view->ncols - 1)
6791 		waddch(view->window, '\n');
6792 	if (--limit <= 0)
6793 		return NULL;
6794 
6795 	n = 0;
6796 	while (re && limit > 0) {
6797 		char *line = NULL;
6798 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6799 
6800 		if (s->show_date) {
6801 			struct got_commit_object *ci;
6802 			struct got_tag_object *tag;
6803 			struct got_object_id *id;
6804 			struct tm tm;
6805 			time_t t;
6806 
6807 			err = got_ref_resolve(&id, s->repo, re->ref);
6808 			if (err)
6809 				return err;
6810 			err = got_object_open_as_tag(&tag, s->repo, id);
6811 			if (err) {
6812 				if (err->code != GOT_ERR_OBJ_TYPE) {
6813 					free(id);
6814 					return err;
6815 				}
6816 				err = got_object_open_as_commit(&ci, s->repo,
6817 				    id);
6818 				if (err) {
6819 					free(id);
6820 					return err;
6821 				}
6822 				t = got_object_commit_get_committer_time(ci);
6823 				got_object_commit_close(ci);
6824 			} else {
6825 				t = got_object_tag_get_tagger_time(tag);
6826 				got_object_tag_close(tag);
6827 			}
6828 			free(id);
6829 			if (gmtime_r(&t, &tm) == NULL)
6830 				return got_error_from_errno("gmtime_r");
6831 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6832 				return got_error(GOT_ERR_NO_SPACE);
6833 		}
6834 		if (got_ref_is_symbolic(re->ref)) {
6835 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6836 			    ymd : "", got_ref_get_name(re->ref),
6837 			    got_ref_get_symref_target(re->ref)) == -1)
6838 				return got_error_from_errno("asprintf");
6839 		} else if (s->show_ids) {
6840 			struct got_object_id *id;
6841 			char *id_str;
6842 			err = got_ref_resolve(&id, s->repo, re->ref);
6843 			if (err)
6844 				return err;
6845 			err = got_object_id_str(&id_str, id);
6846 			if (err) {
6847 				free(id);
6848 				return err;
6849 			}
6850 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6851 			    got_ref_get_name(re->ref), id_str) == -1) {
6852 				err = got_error_from_errno("asprintf");
6853 				free(id);
6854 				free(id_str);
6855 				return err;
6856 			}
6857 			free(id);
6858 			free(id_str);
6859 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6860 		    got_ref_get_name(re->ref)) == -1)
6861 			return got_error_from_errno("asprintf");
6862 
6863 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6864 		    0, 0);
6865 		if (err) {
6866 			free(line);
6867 			return err;
6868 		}
6869 		if (n == s->selected) {
6870 			if (view->focussed)
6871 				wstandout(view->window);
6872 			s->selected_entry = re;
6873 		}
6874 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6875 		if (tc)
6876 			wattr_on(view->window,
6877 			    COLOR_PAIR(tc->colorpair), NULL);
6878 		waddwstr(view->window, wline);
6879 		if (tc)
6880 			wattr_off(view->window,
6881 			    COLOR_PAIR(tc->colorpair), NULL);
6882 		if (width < view->ncols - 1)
6883 			waddch(view->window, '\n');
6884 		if (n == s->selected && view->focussed)
6885 			wstandend(view->window);
6886 		free(line);
6887 		free(wline);
6888 		wline = NULL;
6889 		n++;
6890 		s->ndisplayed++;
6891 		s->last_displayed_entry = re;
6892 
6893 		limit--;
6894 		re = TAILQ_NEXT(re, entry);
6895 	}
6896 
6897 	view_vborder(view);
6898 	return err;
6899 }
6900 
6901 static const struct got_error *
6902 browse_ref_tree(struct tog_view **new_view, int begin_x,
6903     struct tog_reflist_entry *re, struct got_repository *repo)
6904 {
6905 	const struct got_error *err = NULL;
6906 	struct got_object_id *commit_id = NULL;
6907 	struct tog_view *tree_view;
6908 
6909 	*new_view = NULL;
6910 
6911 	err = resolve_reflist_entry(&commit_id, re, repo);
6912 	if (err) {
6913 		if (err->code != GOT_ERR_OBJ_TYPE)
6914 			return err;
6915 		else
6916 			return NULL;
6917 	}
6918 
6919 
6920 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6921 	if (tree_view == NULL) {
6922 		err = got_error_from_errno("view_open");
6923 		goto done;
6924 	}
6925 
6926 	err = open_tree_view(tree_view, commit_id,
6927 	    got_ref_get_name(re->ref), repo);
6928 	if (err)
6929 		goto done;
6930 
6931 	*new_view = tree_view;
6932 done:
6933 	free(commit_id);
6934 	return err;
6935 }
6936 static const struct got_error *
6937 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6938 {
6939 	const struct got_error *err = NULL;
6940 	struct tog_ref_view_state *s = &view->state.ref;
6941 	struct tog_view *log_view, *tree_view;
6942 	struct tog_reflist_entry *re;
6943 	int begin_x = 0, n, nscroll = view->nlines - 1;
6944 
6945 	switch (ch) {
6946 	case 'i':
6947 		s->show_ids = !s->show_ids;
6948 		view->count = 0;
6949 		break;
6950 	case 'm':
6951 		s->show_date = !s->show_date;
6952 		view->count = 0;
6953 		break;
6954 	case 'o':
6955 		s->sort_by_date = !s->sort_by_date;
6956 		view->count = 0;
6957 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6958 		    got_ref_cmp_by_commit_timestamp_descending :
6959 		    tog_ref_cmp_by_name, s->repo);
6960 		if (err)
6961 			break;
6962 		got_reflist_object_id_map_free(tog_refs_idmap);
6963 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6964 		    &tog_refs, s->repo);
6965 		if (err)
6966 			break;
6967 		ref_view_free_refs(s);
6968 		err = ref_view_load_refs(s);
6969 		break;
6970 	case KEY_ENTER:
6971 	case '\r':
6972 		view->count = 0;
6973 		if (!s->selected_entry)
6974 			break;
6975 		if (view_is_parent_view(view))
6976 			begin_x = view_split_begin_x(view->begin_x);
6977 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6978 		    s->repo);
6979 		view->focussed = 0;
6980 		log_view->focussed = 1;
6981 		if (view_is_parent_view(view)) {
6982 			err = view_close_child(view);
6983 			if (err)
6984 				return err;
6985 			err = view_set_child(view, log_view);
6986 			if (err)
6987 				return err;
6988 			view->focus_child = 1;
6989 		} else
6990 			*new_view = log_view;
6991 		break;
6992 	case 't':
6993 		view->count = 0;
6994 		if (!s->selected_entry)
6995 			break;
6996 		if (view_is_parent_view(view))
6997 			begin_x = view_split_begin_x(view->begin_x);
6998 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6999 		    s->repo);
7000 		if (err || tree_view == NULL)
7001 			break;
7002 		view->focussed = 0;
7003 		tree_view->focussed = 1;
7004 		if (view_is_parent_view(view)) {
7005 			err = view_close_child(view);
7006 			if (err)
7007 				return err;
7008 			err = view_set_child(view, tree_view);
7009 			if (err)
7010 				return err;
7011 			view->focus_child = 1;
7012 		} else
7013 			*new_view = tree_view;
7014 		break;
7015 	case 'g':
7016 	case KEY_HOME:
7017 		s->selected = 0;
7018 		view->count = 0;
7019 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7020 		break;
7021 	case 'G':
7022 	case KEY_END:
7023 		s->selected = 0;
7024 		view->count = 0;
7025 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
7026 		for (n = 0; n < view->nlines - 1; n++) {
7027 			if (re == NULL)
7028 				break;
7029 			s->first_displayed_entry = re;
7030 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7031 		}
7032 		if (n > 0)
7033 			s->selected = n - 1;
7034 		break;
7035 	case 'k':
7036 	case KEY_UP:
7037 	case CTRL('p'):
7038 		if (s->selected > 0) {
7039 			s->selected--;
7040 			break;
7041 		}
7042 		ref_scroll_up(s, 1);
7043 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7044 			view->count = 0;
7045 		break;
7046 	case CTRL('u'):
7047 	case 'u':
7048 		nscroll /= 2;
7049 		/* FALL THROUGH */
7050 	case KEY_PPAGE:
7051 	case CTRL('b'):
7052 	case 'b':
7053 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7054 			s->selected -= MIN(nscroll, s->selected);
7055 		ref_scroll_up(s, MAX(0, nscroll));
7056 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7057 			view->count = 0;
7058 		break;
7059 	case 'j':
7060 	case KEY_DOWN:
7061 	case CTRL('n'):
7062 		if (s->selected < s->ndisplayed - 1) {
7063 			s->selected++;
7064 			break;
7065 		}
7066 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7067 			/* can't scroll any further */
7068 			view->count = 0;
7069 			break;
7070 		}
7071 		ref_scroll_down(s, 1);
7072 		break;
7073 	case CTRL('d'):
7074 	case 'd':
7075 		nscroll /= 2;
7076 		/* FALL THROUGH */
7077 	case KEY_NPAGE:
7078 	case CTRL('f'):
7079 	case 'f':
7080 	case ' ':
7081 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7082 			/* can't scroll any further; move cursor down */
7083 			if (s->selected < s->ndisplayed - 1)
7084 				s->selected += MIN(nscroll,
7085 				    s->ndisplayed - s->selected - 1);
7086 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7087 				s->selected += s->ndisplayed - s->selected - 1;
7088 			view->count = 0;
7089 			break;
7090 		}
7091 		ref_scroll_down(s, nscroll);
7092 		break;
7093 	case CTRL('l'):
7094 		view->count = 0;
7095 		tog_free_refs();
7096 		err = tog_load_refs(s->repo, s->sort_by_date);
7097 		if (err)
7098 			break;
7099 		ref_view_free_refs(s);
7100 		err = ref_view_load_refs(s);
7101 		break;
7102 	case KEY_RESIZE:
7103 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7104 			s->selected = view->nlines - 2;
7105 		break;
7106 	default:
7107 		view->count = 0;
7108 		break;
7109 	}
7110 
7111 	return err;
7112 }
7113 
7114 __dead static void
7115 usage_ref(void)
7116 {
7117 	endwin();
7118 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
7119 	    getprogname());
7120 	exit(1);
7121 }
7122 
7123 static const struct got_error *
7124 cmd_ref(int argc, char *argv[])
7125 {
7126 	const struct got_error *error;
7127 	struct got_repository *repo = NULL;
7128 	struct got_worktree *worktree = NULL;
7129 	char *cwd = NULL, *repo_path = NULL;
7130 	int ch;
7131 	struct tog_view *view;
7132 	int *pack_fds = NULL;
7133 
7134 	while ((ch = getopt(argc, argv, "r:")) != -1) {
7135 		switch (ch) {
7136 		case 'r':
7137 			repo_path = realpath(optarg, NULL);
7138 			if (repo_path == NULL)
7139 				return got_error_from_errno2("realpath",
7140 				    optarg);
7141 			break;
7142 		default:
7143 			usage_ref();
7144 			/* NOTREACHED */
7145 		}
7146 	}
7147 
7148 	argc -= optind;
7149 	argv += optind;
7150 
7151 	if (argc > 1)
7152 		usage_ref();
7153 
7154 	error = got_repo_pack_fds_open(&pack_fds);
7155 	if (error != NULL)
7156 		goto done;
7157 
7158 	if (repo_path == NULL) {
7159 		cwd = getcwd(NULL, 0);
7160 		if (cwd == NULL)
7161 			return got_error_from_errno("getcwd");
7162 		error = got_worktree_open(&worktree, cwd);
7163 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7164 			goto done;
7165 		if (worktree)
7166 			repo_path =
7167 			    strdup(got_worktree_get_repo_path(worktree));
7168 		else
7169 			repo_path = strdup(cwd);
7170 		if (repo_path == NULL) {
7171 			error = got_error_from_errno("strdup");
7172 			goto done;
7173 		}
7174 	}
7175 
7176 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7177 	if (error != NULL)
7178 		goto done;
7179 
7180 	init_curses();
7181 
7182 	error = apply_unveil(got_repo_get_path(repo), NULL);
7183 	if (error)
7184 		goto done;
7185 
7186 	error = tog_load_refs(repo, 0);
7187 	if (error)
7188 		goto done;
7189 
7190 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
7191 	if (view == NULL) {
7192 		error = got_error_from_errno("view_open");
7193 		goto done;
7194 	}
7195 
7196 	error = open_ref_view(view, repo);
7197 	if (error)
7198 		goto done;
7199 
7200 	if (worktree) {
7201 		/* Release work tree lock. */
7202 		got_worktree_close(worktree);
7203 		worktree = NULL;
7204 	}
7205 	error = view_loop(view);
7206 done:
7207 	free(repo_path);
7208 	free(cwd);
7209 	if (repo) {
7210 		const struct got_error *close_err = got_repo_close(repo);
7211 		if (close_err)
7212 			error = close_err;
7213 	}
7214 	if (pack_fds) {
7215 		const struct got_error *pack_err =
7216 		    got_repo_pack_fds_close(pack_fds);
7217 		if (error == NULL)
7218 			error = pack_err;
7219 	}
7220 	tog_free_refs();
7221 	return error;
7222 }
7223 
7224 static void
7225 list_commands(FILE *fp)
7226 {
7227 	size_t i;
7228 
7229 	fprintf(fp, "commands:");
7230 	for (i = 0; i < nitems(tog_commands); i++) {
7231 		const struct tog_cmd *cmd = &tog_commands[i];
7232 		fprintf(fp, " %s", cmd->name);
7233 	}
7234 	fputc('\n', fp);
7235 }
7236 
7237 __dead static void
7238 usage(int hflag, int status)
7239 {
7240 	FILE *fp = (status == 0) ? stdout : stderr;
7241 
7242 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7243 	    getprogname());
7244 	if (hflag) {
7245 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7246 		list_commands(fp);
7247 	}
7248 	exit(status);
7249 }
7250 
7251 static char **
7252 make_argv(int argc, ...)
7253 {
7254 	va_list ap;
7255 	char **argv;
7256 	int i;
7257 
7258 	va_start(ap, argc);
7259 
7260 	argv = calloc(argc, sizeof(char *));
7261 	if (argv == NULL)
7262 		err(1, "calloc");
7263 	for (i = 0; i < argc; i++) {
7264 		argv[i] = strdup(va_arg(ap, char *));
7265 		if (argv[i] == NULL)
7266 			err(1, "strdup");
7267 	}
7268 
7269 	va_end(ap);
7270 	return argv;
7271 }
7272 
7273 /*
7274  * Try to convert 'tog path' into a 'tog log path' command.
7275  * The user could simply have mistyped the command rather than knowingly
7276  * provided a path. So check whether argv[0] can in fact be resolved
7277  * to a path in the HEAD commit and print a special error if not.
7278  * This hack is for mpi@ <3
7279  */
7280 static const struct got_error *
7281 tog_log_with_path(int argc, char *argv[])
7282 {
7283 	const struct got_error *error = NULL, *close_err;
7284 	const struct tog_cmd *cmd = NULL;
7285 	struct got_repository *repo = NULL;
7286 	struct got_worktree *worktree = NULL;
7287 	struct got_object_id *commit_id = NULL, *id = NULL;
7288 	struct got_commit_object *commit = NULL;
7289 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7290 	char *commit_id_str = NULL, **cmd_argv = NULL;
7291 	int *pack_fds = NULL;
7292 
7293 	cwd = getcwd(NULL, 0);
7294 	if (cwd == NULL)
7295 		return got_error_from_errno("getcwd");
7296 
7297 	error = got_repo_pack_fds_open(&pack_fds);
7298 	if (error != NULL)
7299 		goto done;
7300 
7301 	error = got_worktree_open(&worktree, cwd);
7302 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7303 		goto done;
7304 
7305 	if (worktree)
7306 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7307 	else
7308 		repo_path = strdup(cwd);
7309 	if (repo_path == NULL) {
7310 		error = got_error_from_errno("strdup");
7311 		goto done;
7312 	}
7313 
7314 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7315 	if (error != NULL)
7316 		goto done;
7317 
7318 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7319 	    repo, worktree);
7320 	if (error)
7321 		goto done;
7322 
7323 	error = tog_load_refs(repo, 0);
7324 	if (error)
7325 		goto done;
7326 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7327 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7328 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7329 	if (error)
7330 		goto done;
7331 
7332 	if (worktree) {
7333 		got_worktree_close(worktree);
7334 		worktree = NULL;
7335 	}
7336 
7337 	error = got_object_open_as_commit(&commit, repo, commit_id);
7338 	if (error)
7339 		goto done;
7340 
7341 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7342 	if (error) {
7343 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7344 			goto done;
7345 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7346 		    getprogname(), argv[0]);
7347 		usage(1, 1);
7348 		/* not reached */
7349 	}
7350 
7351 	close_err = got_repo_close(repo);
7352 	if (error == NULL)
7353 		error = close_err;
7354 	repo = NULL;
7355 
7356 	error = got_object_id_str(&commit_id_str, commit_id);
7357 	if (error)
7358 		goto done;
7359 
7360 	cmd = &tog_commands[0]; /* log */
7361 	argc = 4;
7362 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7363 	error = cmd->cmd_main(argc, cmd_argv);
7364 done:
7365 	if (repo) {
7366 		close_err = got_repo_close(repo);
7367 		if (error == NULL)
7368 			error = close_err;
7369 	}
7370 	if (commit)
7371 		got_object_commit_close(commit);
7372 	if (worktree)
7373 		got_worktree_close(worktree);
7374 	if (pack_fds) {
7375 		const struct got_error *pack_err =
7376 		    got_repo_pack_fds_close(pack_fds);
7377 		if (error == NULL)
7378 			error = pack_err;
7379 	}
7380 	free(id);
7381 	free(commit_id_str);
7382 	free(commit_id);
7383 	free(cwd);
7384 	free(repo_path);
7385 	free(in_repo_path);
7386 	if (cmd_argv) {
7387 		int i;
7388 		for (i = 0; i < argc; i++)
7389 			free(cmd_argv[i]);
7390 		free(cmd_argv);
7391 	}
7392 	tog_free_refs();
7393 	return error;
7394 }
7395 
7396 int
7397 main(int argc, char *argv[])
7398 {
7399 	const struct got_error *error = NULL;
7400 	const struct tog_cmd *cmd = NULL;
7401 	int ch, hflag = 0, Vflag = 0;
7402 	char **cmd_argv = NULL;
7403 	static const struct option longopts[] = {
7404 	    { "version", no_argument, NULL, 'V' },
7405 	    { NULL, 0, NULL, 0}
7406 	};
7407 
7408 	setlocale(LC_CTYPE, "");
7409 
7410 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7411 		switch (ch) {
7412 		case 'h':
7413 			hflag = 1;
7414 			break;
7415 		case 'V':
7416 			Vflag = 1;
7417 			break;
7418 		default:
7419 			usage(hflag, 1);
7420 			/* NOTREACHED */
7421 		}
7422 	}
7423 
7424 	argc -= optind;
7425 	argv += optind;
7426 	optind = 1;
7427 	optreset = 1;
7428 
7429 	if (Vflag) {
7430 		got_version_print_str();
7431 		return 0;
7432 	}
7433 
7434 #ifndef PROFILE
7435 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7436 	    NULL) == -1)
7437 		err(1, "pledge");
7438 #endif
7439 
7440 	if (argc == 0) {
7441 		if (hflag)
7442 			usage(hflag, 0);
7443 		/* Build an argument vector which runs a default command. */
7444 		cmd = &tog_commands[0];
7445 		argc = 1;
7446 		cmd_argv = make_argv(argc, cmd->name);
7447 	} else {
7448 		size_t i;
7449 
7450 		/* Did the user specify a command? */
7451 		for (i = 0; i < nitems(tog_commands); i++) {
7452 			if (strncmp(tog_commands[i].name, argv[0],
7453 			    strlen(argv[0])) == 0) {
7454 				cmd = &tog_commands[i];
7455 				break;
7456 			}
7457 		}
7458 	}
7459 
7460 	if (cmd == NULL) {
7461 		if (argc != 1)
7462 			usage(0, 1);
7463 		/* No command specified; try log with a path */
7464 		error = tog_log_with_path(argc, argv);
7465 	} else {
7466 		if (hflag)
7467 			cmd->cmd_usage();
7468 		else
7469 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7470 	}
7471 
7472 	endwin();
7473 	putchar('\n');
7474 	if (cmd_argv) {
7475 		int i;
7476 		for (i = 0; i < argc; i++)
7477 			free(cmd_argv[i]);
7478 		free(cmd_argv);
7479 	}
7480 
7481 	if (error && error->code != GOT_ERR_CANCELLED)
7482 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7483 	return 0;
7484 }