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