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