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/stat.h>
18 #include <sys/ioctl.h>
19 
20 #include <ctype.h>
21 #include <errno.h>
22 #if defined(__FreeBSD__) || defined(__APPLE__)
23 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
24 #endif
25 #include <curses.h>
26 #include <panel.h>
27 #include <locale.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <getopt.h>
33 #include <string.h>
34 #include <err.h>
35 #include <unistd.h>
36 #include <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_compat.h"
45 
46 #include "got_version.h"
47 #include "got_error.h"
48 #include "got_object.h"
49 #include "got_reference.h"
50 #include "got_repository.h"
51 #include "got_diff.h"
52 #include "got_opentemp.h"
53 #include "got_utf8.h"
54 #include "got_cancel.h"
55 #include "got_commit_graph.h"
56 #include "got_blame.h"
57 #include "got_privsep.h"
58 #include "got_path.h"
59 #include "got_worktree.h"
60 
61 //#define update_panels() (0)
62 //#define doupdate() (0)
63 
64 #ifndef MIN
65 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
66 #endif
67 
68 #ifndef MAX
69 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
70 #endif
71 
72 #ifndef CTRL
73 #define CTRL(x)		((x) & 0x1f)
74 #endif
75 
76 #ifndef nitems
77 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
78 #endif
79 
80 struct tog_cmd {
81 	const char *name;
82 	const struct got_error *(*cmd_main)(int, char *[]);
83 	void (*cmd_usage)(void);
84 };
85 
86 __dead static void	usage(int, int);
87 __dead static void	usage_log(void);
88 __dead static void	usage_diff(void);
89 __dead static void	usage_blame(void);
90 __dead static void	usage_tree(void);
91 __dead static void	usage_ref(void);
92 
93 static const struct got_error*	cmd_log(int, char *[]);
94 static const struct got_error*	cmd_diff(int, char *[]);
95 static const struct got_error*	cmd_blame(int, char *[]);
96 static const struct got_error*	cmd_tree(int, char *[]);
97 static const struct got_error*	cmd_ref(int, char *[]);
98 
99 static const struct tog_cmd tog_commands[] = {
100 	{ "log",	cmd_log,	usage_log },
101 	{ "diff",	cmd_diff,	usage_diff },
102 	{ "blame",	cmd_blame,	usage_blame },
103 	{ "tree",	cmd_tree,	usage_tree },
104 	{ "ref",	cmd_ref,	usage_ref },
105 };
106 
107 enum tog_view_type {
108 	TOG_VIEW_DIFF,
109 	TOG_VIEW_LOG,
110 	TOG_VIEW_BLAME,
111 	TOG_VIEW_TREE,
112 	TOG_VIEW_REF,
113 };
114 
115 #define TOG_EOF_STRING	"(END)"
116 
117 struct commit_queue_entry {
118 	TAILQ_ENTRY(commit_queue_entry) entry;
119 	struct got_object_id *id;
120 	struct got_commit_object *commit;
121 	int idx;
122 };
123 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
124 struct commit_queue {
125 	int ncommits;
126 	struct commit_queue_head head;
127 };
128 
129 struct tog_color {
130 	STAILQ_ENTRY(tog_color) entry;
131 	regex_t regex;
132 	short colorpair;
133 };
134 STAILQ_HEAD(tog_colors, tog_color);
135 
136 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
137 static struct got_reflist_object_id_map *tog_refs_idmap;
138 
139 static const struct got_error *
140 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
141     struct got_reference* re2)
142 {
143 	const char *name1 = got_ref_get_name(re1);
144 	const char *name2 = got_ref_get_name(re2);
145 	int isbackup1, isbackup2;
146 
147 	/* Sort backup refs towards the bottom of the list. */
148 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
149 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
150 	if (!isbackup1 && isbackup2) {
151 		*cmp = -1;
152 		return NULL;
153 	} else if (isbackup1 && !isbackup2) {
154 		*cmp = 1;
155 		return NULL;
156 	}
157 
158 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
159 	return NULL;
160 }
161 
162 static const struct got_error *
163 tog_load_refs(struct got_repository *repo, int sort_by_date)
164 {
165 	const struct got_error *err;
166 
167 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
168 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
169 	    repo);
170 	if (err)
171 		return err;
172 
173 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
174 	    repo);
175 }
176 
177 static void
178 tog_free_refs(void)
179 {
180 	if (tog_refs_idmap) {
181 		got_reflist_object_id_map_free(tog_refs_idmap);
182 		tog_refs_idmap = NULL;
183 	}
184 	got_ref_list_free(&tog_refs);
185 }
186 
187 static const struct got_error *
188 add_color(struct tog_colors *colors, const char *pattern,
189     int idx, short color)
190 {
191 	const struct got_error *err = NULL;
192 	struct tog_color *tc;
193 	int regerr = 0;
194 
195 	if (idx < 1 || idx > COLOR_PAIRS - 1)
196 		return NULL;
197 
198 	init_pair(idx, color, -1);
199 
200 	tc = calloc(1, sizeof(*tc));
201 	if (tc == NULL)
202 		return got_error_from_errno("calloc");
203 	regerr = regcomp(&tc->regex, pattern,
204 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
205 	if (regerr) {
206 		static char regerr_msg[512];
207 		static char err_msg[512];
208 		regerror(regerr, &tc->regex, regerr_msg,
209 		    sizeof(regerr_msg));
210 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
211 		    regerr_msg);
212 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
213 		free(tc);
214 		return err;
215 	}
216 	tc->colorpair = idx;
217 	STAILQ_INSERT_HEAD(colors, tc, entry);
218 	return NULL;
219 }
220 
221 static void
222 free_colors(struct tog_colors *colors)
223 {
224 	struct tog_color *tc;
225 
226 	while (!STAILQ_EMPTY(colors)) {
227 		tc = STAILQ_FIRST(colors);
228 		STAILQ_REMOVE_HEAD(colors, entry);
229 		regfree(&tc->regex);
230 		free(tc);
231 	}
232 }
233 
234 struct tog_color *
235 get_color(struct tog_colors *colors, int colorpair)
236 {
237 	struct tog_color *tc = NULL;
238 
239 	STAILQ_FOREACH(tc, colors, entry) {
240 		if (tc->colorpair == colorpair)
241 			return tc;
242 	}
243 
244 	return NULL;
245 }
246 
247 static int
248 default_color_value(const char *envvar)
249 {
250 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
251 		return COLOR_MAGENTA;
252 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
253 		return COLOR_CYAN;
254 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
255 		return COLOR_YELLOW;
256 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
257 		return COLOR_GREEN;
258 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
259 		return COLOR_MAGENTA;
260 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
261 		return COLOR_MAGENTA;
262 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
263 		return COLOR_CYAN;
264 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
265 		return COLOR_GREEN;
266 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
267 		return COLOR_GREEN;
268 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
269 		return COLOR_CYAN;
270 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
271 		return COLOR_YELLOW;
272 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
273 		return COLOR_GREEN;
274 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
275 		return COLOR_MAGENTA;
276 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
277 		return COLOR_YELLOW;
278 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
279 		return COLOR_CYAN;
280 
281 	return -1;
282 }
283 
284 static int
285 get_color_value(const char *envvar)
286 {
287 	const char *val = getenv(envvar);
288 
289 	if (val == NULL)
290 		return default_color_value(envvar);
291 
292 	if (strcasecmp(val, "black") == 0)
293 		return COLOR_BLACK;
294 	if (strcasecmp(val, "red") == 0)
295 		return COLOR_RED;
296 	if (strcasecmp(val, "green") == 0)
297 		return COLOR_GREEN;
298 	if (strcasecmp(val, "yellow") == 0)
299 		return COLOR_YELLOW;
300 	if (strcasecmp(val, "blue") == 0)
301 		return COLOR_BLUE;
302 	if (strcasecmp(val, "magenta") == 0)
303 		return COLOR_MAGENTA;
304 	if (strcasecmp(val, "cyan") == 0)
305 		return COLOR_CYAN;
306 	if (strcasecmp(val, "white") == 0)
307 		return COLOR_WHITE;
308 	if (strcasecmp(val, "default") == 0)
309 		return -1;
310 
311 	return default_color_value(envvar);
312 }
313 
314 
315 struct tog_diff_view_state {
316 	struct got_object_id *id1, *id2;
317 	const char *label1, *label2;
318 	FILE *f, *f1, *f2;
319 	int first_displayed_line;
320 	int last_displayed_line;
321 	int eof;
322 	int diff_context;
323 	int ignore_whitespace;
324 	int force_text_diff;
325 	struct got_repository *repo;
326 	struct tog_colors colors;
327 	size_t nlines;
328 	off_t *line_offsets;
329 	int matched_line;
330 	int selected_line;
331 
332 	/* passed from log view; may be NULL */
333 	struct tog_view *log_view;
334 };
335 
336 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
337 
338 struct tog_log_thread_args {
339 	pthread_cond_t need_commits;
340 	pthread_cond_t commit_loaded;
341 	int commits_needed;
342 	int load_all;
343 	struct got_commit_graph *graph;
344 	struct commit_queue *commits;
345 	const char *in_repo_path;
346 	struct got_object_id *start_id;
347 	struct got_repository *repo;
348 	int *pack_fds;
349 	int log_complete;
350 	sig_atomic_t *quit;
351 	struct commit_queue_entry **first_displayed_entry;
352 	struct commit_queue_entry **selected_entry;
353 	int *searching;
354 	int *search_next_done;
355 	regex_t *regex;
356 };
357 
358 struct tog_log_view_state {
359 	struct commit_queue commits;
360 	struct commit_queue_entry *first_displayed_entry;
361 	struct commit_queue_entry *last_displayed_entry;
362 	struct commit_queue_entry *selected_entry;
363 	int selected;
364 	char *in_repo_path;
365 	char *head_ref_name;
366 	int log_branches;
367 	struct got_repository *repo;
368 	struct got_object_id *start_id;
369 	sig_atomic_t quit;
370 	pthread_t thread;
371 	struct tog_log_thread_args thread_args;
372 	struct commit_queue_entry *matched_entry;
373 	struct commit_queue_entry *search_entry;
374 	struct tog_colors colors;
375 };
376 
377 #define TOG_COLOR_DIFF_MINUS		1
378 #define TOG_COLOR_DIFF_PLUS		2
379 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
380 #define TOG_COLOR_DIFF_META		4
381 #define TOG_COLOR_TREE_SUBMODULE	5
382 #define TOG_COLOR_TREE_SYMLINK		6
383 #define TOG_COLOR_TREE_DIRECTORY	7
384 #define TOG_COLOR_TREE_EXECUTABLE	8
385 #define TOG_COLOR_COMMIT		9
386 #define TOG_COLOR_AUTHOR		10
387 #define TOG_COLOR_DATE			11
388 #define TOG_COLOR_REFS_HEADS		12
389 #define TOG_COLOR_REFS_TAGS		13
390 #define TOG_COLOR_REFS_REMOTES		14
391 #define TOG_COLOR_REFS_BACKUP		15
392 
393 struct tog_blame_cb_args {
394 	struct tog_blame_line *lines; /* one per line */
395 	int nlines;
396 
397 	struct tog_view *view;
398 	struct got_object_id *commit_id;
399 	int *quit;
400 };
401 
402 struct tog_blame_thread_args {
403 	const char *path;
404 	struct got_repository *repo;
405 	struct tog_blame_cb_args *cb_args;
406 	int *complete;
407 	got_cancel_cb cancel_cb;
408 	void *cancel_arg;
409 };
410 
411 struct tog_blame {
412 	FILE *f;
413 	off_t filesize;
414 	struct tog_blame_line *lines;
415 	int nlines;
416 	off_t *line_offsets;
417 	pthread_t thread;
418 	struct tog_blame_thread_args thread_args;
419 	struct tog_blame_cb_args cb_args;
420 	const char *path;
421 	int *pack_fds;
422 };
423 
424 struct tog_blame_view_state {
425 	int first_displayed_line;
426 	int last_displayed_line;
427 	int selected_line;
428 	int blame_complete;
429 	int eof;
430 	int done;
431 	struct got_object_id_queue blamed_commits;
432 	struct got_object_qid *blamed_commit;
433 	char *path;
434 	struct got_repository *repo;
435 	struct got_object_id *commit_id;
436 	struct tog_blame blame;
437 	int matched_line;
438 	struct tog_colors colors;
439 };
440 
441 struct tog_parent_tree {
442 	TAILQ_ENTRY(tog_parent_tree) entry;
443 	struct got_tree_object *tree;
444 	struct got_tree_entry *first_displayed_entry;
445 	struct got_tree_entry *selected_entry;
446 	int selected;
447 };
448 
449 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
450 
451 struct tog_tree_view_state {
452 	char *tree_label;
453 	struct got_object_id *commit_id;/* commit which this tree belongs to */
454 	struct got_tree_object *root;	/* the commit's root tree entry */
455 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
456 	struct got_tree_entry *first_displayed_entry;
457 	struct got_tree_entry *last_displayed_entry;
458 	struct got_tree_entry *selected_entry;
459 	int ndisplayed, selected, show_ids;
460 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
461 	char *head_ref_name;
462 	struct got_repository *repo;
463 	struct got_tree_entry *matched_entry;
464 	struct tog_colors colors;
465 };
466 
467 struct tog_reflist_entry {
468 	TAILQ_ENTRY(tog_reflist_entry) entry;
469 	struct got_reference *ref;
470 	int idx;
471 };
472 
473 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
474 
475 struct tog_ref_view_state {
476 	struct tog_reflist_head refs;
477 	struct tog_reflist_entry *first_displayed_entry;
478 	struct tog_reflist_entry *last_displayed_entry;
479 	struct tog_reflist_entry *selected_entry;
480 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
481 	struct got_repository *repo;
482 	struct tog_reflist_entry *matched_entry;
483 	struct tog_colors colors;
484 };
485 
486 /*
487  * We implement two types of views: parent views and child views.
488  *
489  * The 'Tab' key switches focus between a parent view and its child view.
490  * Child views are shown side-by-side to their parent view, provided
491  * there is enough screen estate.
492  *
493  * When a new view is opened from within a parent view, this new view
494  * becomes a child view of the parent view, replacing any existing child.
495  *
496  * When a new view is opened from within a child view, this new view
497  * becomes a parent view which will obscure the views below until the
498  * user quits the new parent view by typing 'q'.
499  *
500  * This list of views contains parent views only.
501  * Child views are only pointed to by their parent view.
502  */
503 TAILQ_HEAD(tog_view_list_head, tog_view);
504 
505 struct tog_view {
506 	TAILQ_ENTRY(tog_view) entry;
507 	WINDOW *window;
508 	PANEL *panel;
509 	int nlines, ncols, begin_y, begin_x;
510 	int maxx, x; /* max column and current start column */
511 	int lines, cols; /* copies of LINES and COLS */
512 	int focussed; /* Only set on one parent or child view at a time. */
513 	int dying;
514 	struct tog_view *parent;
515 	struct tog_view *child;
516 
517 	/*
518 	 * This flag is initially set on parent views when a new child view
519 	 * is created. It gets toggled when the 'Tab' key switches focus
520 	 * between parent and child.
521 	 * The flag indicates whether focus should be passed on to our child
522 	 * view if this parent view gets picked for focus after another parent
523 	 * view was closed. This prevents child views from losing focus in such
524 	 * situations.
525 	 */
526 	int focus_child;
527 
528 	/* type-specific state */
529 	enum tog_view_type type;
530 	union {
531 		struct tog_diff_view_state diff;
532 		struct tog_log_view_state log;
533 		struct tog_blame_view_state blame;
534 		struct tog_tree_view_state tree;
535 		struct tog_ref_view_state ref;
536 	} state;
537 
538 	const struct got_error *(*show)(struct tog_view *);
539 	const struct got_error *(*input)(struct tog_view **,
540 	    struct tog_view *, int);
541 	const struct got_error *(*close)(struct tog_view *);
542 
543 	const struct got_error *(*search_start)(struct tog_view *);
544 	const struct got_error *(*search_next)(struct tog_view *);
545 	int search_started;
546 	int searching;
547 #define TOG_SEARCH_FORWARD	1
548 #define TOG_SEARCH_BACKWARD	2
549 	int search_next_done;
550 #define TOG_SEARCH_HAVE_MORE	1
551 #define TOG_SEARCH_NO_MORE	2
552 #define TOG_SEARCH_HAVE_NONE	3
553 	regex_t regex;
554 	regmatch_t regmatch;
555 };
556 
557 static const struct got_error *open_diff_view(struct tog_view *,
558     struct got_object_id *, struct got_object_id *,
559     const char *, const char *, int, int, int, struct tog_view *,
560     struct got_repository *);
561 static const struct got_error *show_diff_view(struct tog_view *);
562 static const struct got_error *input_diff_view(struct tog_view **,
563     struct tog_view *, int);
564 static const struct got_error* close_diff_view(struct tog_view *);
565 static const struct got_error *search_start_diff_view(struct tog_view *);
566 static const struct got_error *search_next_diff_view(struct tog_view *);
567 
568 static const struct got_error *open_log_view(struct tog_view *,
569     struct got_object_id *, struct got_repository *,
570     const char *, const char *, int);
571 static const struct got_error * show_log_view(struct tog_view *);
572 static const struct got_error *input_log_view(struct tog_view **,
573     struct tog_view *, int);
574 static const struct got_error *close_log_view(struct tog_view *);
575 static const struct got_error *search_start_log_view(struct tog_view *);
576 static const struct got_error *search_next_log_view(struct tog_view *);
577 
578 static const struct got_error *open_blame_view(struct tog_view *, char *,
579     struct got_object_id *, struct got_repository *);
580 static const struct got_error *show_blame_view(struct tog_view *);
581 static const struct got_error *input_blame_view(struct tog_view **,
582     struct tog_view *, int);
583 static const struct got_error *close_blame_view(struct tog_view *);
584 static const struct got_error *search_start_blame_view(struct tog_view *);
585 static const struct got_error *search_next_blame_view(struct tog_view *);
586 
587 static const struct got_error *open_tree_view(struct tog_view *,
588     struct got_object_id *, const char *, struct got_repository *);
589 static const struct got_error *show_tree_view(struct tog_view *);
590 static const struct got_error *input_tree_view(struct tog_view **,
591     struct tog_view *, int);
592 static const struct got_error *close_tree_view(struct tog_view *);
593 static const struct got_error *search_start_tree_view(struct tog_view *);
594 static const struct got_error *search_next_tree_view(struct tog_view *);
595 
596 static const struct got_error *open_ref_view(struct tog_view *,
597     struct got_repository *);
598 static const struct got_error *show_ref_view(struct tog_view *);
599 static const struct got_error *input_ref_view(struct tog_view **,
600     struct tog_view *, int);
601 static const struct got_error *close_ref_view(struct tog_view *);
602 static const struct got_error *search_start_ref_view(struct tog_view *);
603 static const struct got_error *search_next_ref_view(struct tog_view *);
604 
605 static volatile sig_atomic_t tog_sigwinch_received;
606 static volatile sig_atomic_t tog_sigpipe_received;
607 static volatile sig_atomic_t tog_sigcont_received;
608 static volatile sig_atomic_t tog_sigint_received;
609 static volatile sig_atomic_t tog_sigterm_received;
610 
611 static void
612 tog_sigwinch(int signo)
613 {
614 	tog_sigwinch_received = 1;
615 }
616 
617 static void
618 tog_sigpipe(int signo)
619 {
620 	tog_sigpipe_received = 1;
621 }
622 
623 static void
624 tog_sigcont(int signo)
625 {
626 	tog_sigcont_received = 1;
627 }
628 
629 static void
630 tog_sigint(int signo)
631 {
632 	tog_sigint_received = 1;
633 }
634 
635 static void
636 tog_sigterm(int signo)
637 {
638 	tog_sigterm_received = 1;
639 }
640 
641 static int
642 tog_fatal_signal_received(void)
643 {
644 	return (tog_sigpipe_received ||
645 	    tog_sigint_received || tog_sigint_received);
646 }
647 
648 
649 static const struct got_error *
650 view_close(struct tog_view *view)
651 {
652 	const struct got_error *err = NULL;
653 
654 	if (view->child) {
655 		view_close(view->child);
656 		view->child = NULL;
657 	}
658 	if (view->close)
659 		err = view->close(view);
660 	if (view->panel)
661 		del_panel(view->panel);
662 	if (view->window)
663 		delwin(view->window);
664 	free(view);
665 	return err;
666 }
667 
668 static struct tog_view *
669 view_open(int nlines, int ncols, int begin_y, int begin_x,
670     enum tog_view_type type)
671 {
672 	struct tog_view *view = calloc(1, sizeof(*view));
673 
674 	if (view == NULL)
675 		return NULL;
676 
677 	view->type = type;
678 	view->lines = LINES;
679 	view->cols = COLS;
680 	view->nlines = nlines ? nlines : LINES - begin_y;
681 	view->ncols = ncols ? ncols : COLS - begin_x;
682 	view->begin_y = begin_y;
683 	view->begin_x = begin_x;
684 	view->window = newwin(nlines, ncols, begin_y, begin_x);
685 	if (view->window == NULL) {
686 		view_close(view);
687 		return NULL;
688 	}
689 	view->panel = new_panel(view->window);
690 	if (view->panel == NULL ||
691 	    set_panel_userptr(view->panel, view) != OK) {
692 		view_close(view);
693 		return NULL;
694 	}
695 
696 	keypad(view->window, TRUE);
697 	return view;
698 }
699 
700 static int
701 view_split_begin_x(int begin_x)
702 {
703 	if (begin_x > 0 || COLS < 120)
704 		return 0;
705 	return (COLS - MAX(COLS / 2, 80));
706 }
707 
708 static const struct got_error *view_resize(struct tog_view *);
709 
710 static const struct got_error *
711 view_splitscreen(struct tog_view *view)
712 {
713 	const struct got_error *err = NULL;
714 
715 	view->begin_y = 0;
716 	view->begin_x = view_split_begin_x(0);
717 	view->nlines = LINES;
718 	view->ncols = COLS - view->begin_x;
719 	view->lines = LINES;
720 	view->cols = COLS;
721 	err = view_resize(view);
722 	if (err)
723 		return err;
724 
725 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
726 		return got_error_from_errno("mvwin");
727 
728 	return NULL;
729 }
730 
731 static const struct got_error *
732 view_fullscreen(struct tog_view *view)
733 {
734 	const struct got_error *err = NULL;
735 
736 	view->begin_x = 0;
737 	view->begin_y = 0;
738 	view->nlines = LINES;
739 	view->ncols = COLS;
740 	view->lines = LINES;
741 	view->cols = COLS;
742 	err = view_resize(view);
743 	if (err)
744 		return err;
745 
746 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
747 		return got_error_from_errno("mvwin");
748 
749 	return NULL;
750 }
751 
752 static int
753 view_is_parent_view(struct tog_view *view)
754 {
755 	return view->parent == NULL;
756 }
757 
758 static const struct got_error *
759 view_resize(struct tog_view *view)
760 {
761 	int nlines, ncols;
762 
763 	if (view->lines > LINES)
764 		nlines = view->nlines - (view->lines - LINES);
765 	else
766 		nlines = view->nlines + (LINES - view->lines);
767 
768 	if (view->cols > COLS)
769 		ncols = view->ncols - (view->cols - COLS);
770 	else
771 		ncols = view->ncols + (COLS - view->cols);
772 
773 	if (view->child) {
774 		view->child->begin_x = view_split_begin_x(view->begin_x);
775 		if (view->child->begin_x == 0) {
776 			ncols = COLS;
777 
778 			view_fullscreen(view->child);
779 			if (view->child->focussed)
780 				show_panel(view->child->panel);
781 			else
782 				show_panel(view->panel);
783 		} else {
784 			ncols = view->child->begin_x;
785 
786 			view_splitscreen(view->child);
787 			show_panel(view->child->panel);
788 		}
789 	} else if (view->parent == NULL)
790 		ncols = COLS;
791 
792 	if (wresize(view->window, nlines, ncols) == ERR)
793 		return got_error_from_errno("wresize");
794 	if (replace_panel(view->panel, view->window) == ERR)
795 		return got_error_from_errno("replace_panel");
796 	wclear(view->window);
797 
798 	view->nlines = nlines;
799 	view->ncols = ncols;
800 	view->lines = LINES;
801 	view->cols = COLS;
802 
803 	return NULL;
804 }
805 
806 static const struct got_error *
807 view_close_child(struct tog_view *view)
808 {
809 	const struct got_error *err = NULL;
810 
811 	if (view->child == NULL)
812 		return NULL;
813 
814 	err = view_close(view->child);
815 	view->child = NULL;
816 	return err;
817 }
818 
819 static const struct got_error *
820 view_set_child(struct tog_view *view, struct tog_view *child)
821 {
822 	view->child = child;
823 	child->parent = view;
824 
825 	return view_resize(view);
826 }
827 
828 static int
829 view_is_splitscreen(struct tog_view *view)
830 {
831 	return view->begin_x > 0;
832 }
833 
834 static void
835 tog_resizeterm(void)
836 {
837 	int cols, lines;
838 	struct winsize size;
839 
840 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
841 		cols = 80;     /* Default */
842 		lines = 24;
843 	} else {
844 		cols = size.ws_col;
845 		lines = size.ws_row;
846 	}
847 	resize_term(lines, cols);
848 }
849 
850 static const struct got_error *
851 view_search_start(struct tog_view *view)
852 {
853 	const struct got_error *err = NULL;
854 	char pattern[1024];
855 	int ret;
856 
857 	if (view->search_started) {
858 		regfree(&view->regex);
859 		view->searching = 0;
860 		memset(&view->regmatch, 0, sizeof(view->regmatch));
861 	}
862 	view->search_started = 0;
863 
864 	if (view->nlines < 1)
865 		return NULL;
866 
867 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
868 	wclrtoeol(view->window);
869 
870 	nocbreak();
871 	echo();
872 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
873 	cbreak();
874 	noecho();
875 	if (ret == ERR)
876 		return NULL;
877 
878 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
879 		err = view->search_start(view);
880 		if (err) {
881 			regfree(&view->regex);
882 			return err;
883 		}
884 		view->search_started = 1;
885 		view->searching = TOG_SEARCH_FORWARD;
886 		view->search_next_done = 0;
887 		view->search_next(view);
888 	}
889 
890 	return NULL;
891 }
892 
893 static const struct got_error *
894 view_input(struct tog_view **new, int *done, struct tog_view *view,
895     struct tog_view_list_head *views)
896 {
897 	const struct got_error *err = NULL;
898 	struct tog_view *v;
899 	int ch, errcode;
900 
901 	*new = NULL;
902 
903 	/* Clear "no matches" indicator. */
904 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
905 	    view->search_next_done == TOG_SEARCH_HAVE_NONE)
906 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
907 
908 	if (view->searching && !view->search_next_done) {
909 		errcode = pthread_mutex_unlock(&tog_mutex);
910 		if (errcode)
911 			return got_error_set_errno(errcode,
912 			    "pthread_mutex_unlock");
913 		sched_yield();
914 		errcode = pthread_mutex_lock(&tog_mutex);
915 		if (errcode)
916 			return got_error_set_errno(errcode,
917 			    "pthread_mutex_lock");
918 		view->search_next(view);
919 		return NULL;
920 	}
921 
922 	nodelay(stdscr, FALSE);
923 	/* Allow threads to make progress while we are waiting for input. */
924 	errcode = pthread_mutex_unlock(&tog_mutex);
925 	if (errcode)
926 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
927 	ch = wgetch(view->window);
928 	errcode = pthread_mutex_lock(&tog_mutex);
929 	if (errcode)
930 		return got_error_set_errno(errcode, "pthread_mutex_lock");
931 	nodelay(stdscr, TRUE);
932 
933 	if (tog_sigwinch_received || tog_sigcont_received) {
934 		tog_resizeterm();
935 		tog_sigwinch_received = 0;
936 		tog_sigcont_received = 0;
937 		TAILQ_FOREACH(v, views, entry) {
938 			err = view_resize(v);
939 			if (err)
940 				return err;
941 			err = v->input(new, v, KEY_RESIZE);
942 			if (err)
943 				return err;
944 			if (v->child) {
945 				err = view_resize(v->child);
946 				if (err)
947 					return err;
948 				err = v->child->input(new, v->child,
949 				    KEY_RESIZE);
950 				if (err)
951 					return err;
952 			}
953 		}
954 	}
955 
956 	switch (ch) {
957 	case '\t':
958 		if (view->child) {
959 			view->focussed = 0;
960 			view->child->focussed = 1;
961 			view->focus_child = 1;
962 		} else if (view->parent) {
963 			view->focussed = 0;
964 			view->parent->focussed = 1;
965 			view->parent->focus_child = 0;
966 		}
967 		break;
968 	case 'q':
969 		err = view->input(new, view, ch);
970 		view->dying = 1;
971 		break;
972 	case 'Q':
973 		*done = 1;
974 		break;
975 	case 'f':
976 		if (view_is_parent_view(view)) {
977 			if (view->child == NULL)
978 				break;
979 			if (view_is_splitscreen(view->child)) {
980 				view->focussed = 0;
981 				view->child->focussed = 1;
982 				err = view_fullscreen(view->child);
983 			} else
984 				err = view_splitscreen(view->child);
985 			if (err)
986 				break;
987 			err = view->child->input(new, view->child,
988 			    KEY_RESIZE);
989 		} else {
990 			if (view_is_splitscreen(view)) {
991 				view->parent->focussed = 0;
992 				view->focussed = 1;
993 				err = view_fullscreen(view);
994 			} else {
995 				err = view_splitscreen(view);
996 			}
997 			if (err)
998 				break;
999 			err = view->input(new, view, KEY_RESIZE);
1000 		}
1001 		break;
1002 	case KEY_RESIZE:
1003 		break;
1004 	case '/':
1005 		if (view->search_start)
1006 			view_search_start(view);
1007 		else
1008 			err = view->input(new, view, ch);
1009 		break;
1010 	case 'N':
1011 	case 'n':
1012 		if (view->search_started && view->search_next) {
1013 			view->searching = (ch == 'n' ?
1014 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1015 			view->search_next_done = 0;
1016 			view->search_next(view);
1017 		} else
1018 			err = view->input(new, view, ch);
1019 		break;
1020 	default:
1021 		err = view->input(new, view, ch);
1022 		break;
1023 	}
1024 
1025 	return err;
1026 }
1027 
1028 void
1029 view_vborder(struct tog_view *view)
1030 {
1031 	PANEL *panel;
1032 	const struct tog_view *view_above;
1033 
1034 	if (view->parent)
1035 		return view_vborder(view->parent);
1036 
1037 	panel = panel_above(view->panel);
1038 	if (panel == NULL)
1039 		return;
1040 
1041 	view_above = panel_userptr(panel);
1042 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1043 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
1044 }
1045 
1046 int
1047 view_needs_focus_indication(struct tog_view *view)
1048 {
1049 	if (view_is_parent_view(view)) {
1050 		if (view->child == NULL || view->child->focussed)
1051 			return 0;
1052 		if (!view_is_splitscreen(view->child))
1053 			return 0;
1054 	} else if (!view_is_splitscreen(view))
1055 		return 0;
1056 
1057 	return view->focussed;
1058 }
1059 
1060 static const struct got_error *
1061 view_loop(struct tog_view *view)
1062 {
1063 	const struct got_error *err = NULL;
1064 	struct tog_view_list_head views;
1065 	struct tog_view *new_view;
1066 	int fast_refresh = 10;
1067 	int done = 0, errcode;
1068 
1069 	errcode = pthread_mutex_lock(&tog_mutex);
1070 	if (errcode)
1071 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1072 
1073 	TAILQ_INIT(&views);
1074 	TAILQ_INSERT_HEAD(&views, view, entry);
1075 
1076 	view->focussed = 1;
1077 	err = view->show(view);
1078 	if (err)
1079 		return err;
1080 	update_panels();
1081 	doupdate();
1082 	while (!TAILQ_EMPTY(&views) && !done && !tog_fatal_signal_received()) {
1083 		/* Refresh fast during initialization, then become slower. */
1084 		if (fast_refresh && fast_refresh-- == 0)
1085 			halfdelay(10); /* switch to once per second */
1086 
1087 		err = view_input(&new_view, &done, view, &views);
1088 		if (err)
1089 			break;
1090 		if (view->dying) {
1091 			struct tog_view *v, *prev = NULL;
1092 
1093 			if (view_is_parent_view(view))
1094 				prev = TAILQ_PREV(view, tog_view_list_head,
1095 				    entry);
1096 			else if (view->parent)
1097 				prev = view->parent;
1098 
1099 			if (view->parent) {
1100 				view->parent->child = NULL;
1101 				view->parent->focus_child = 0;
1102 
1103 				err = view_resize(view->parent);
1104 				if (err)
1105 					break;
1106 			} else
1107 				TAILQ_REMOVE(&views, view, entry);
1108 
1109 			err = view_close(view);
1110 			if (err)
1111 				goto done;
1112 
1113 			view = NULL;
1114 			TAILQ_FOREACH(v, &views, entry) {
1115 				if (v->focussed)
1116 					break;
1117 			}
1118 			if (view == NULL && new_view == NULL) {
1119 				/* No view has focus. Try to pick one. */
1120 				if (prev)
1121 					view = prev;
1122 				else if (!TAILQ_EMPTY(&views)) {
1123 					view = TAILQ_LAST(&views,
1124 					    tog_view_list_head);
1125 				}
1126 				if (view) {
1127 					if (view->focus_child) {
1128 						view->child->focussed = 1;
1129 						view = view->child;
1130 					} else
1131 						view->focussed = 1;
1132 				}
1133 			}
1134 		}
1135 		if (new_view) {
1136 			struct tog_view *v, *t;
1137 			/* Only allow one parent view per type. */
1138 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1139 				if (v->type != new_view->type)
1140 					continue;
1141 				TAILQ_REMOVE(&views, v, entry);
1142 				err = view_close(v);
1143 				if (err)
1144 					goto done;
1145 				break;
1146 			}
1147 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1148 			view = new_view;
1149 		}
1150 		if (view) {
1151 			if (view_is_parent_view(view)) {
1152 				if (view->child && view->child->focussed)
1153 					view = view->child;
1154 			} else {
1155 				if (view->parent && view->parent->focussed)
1156 					view = view->parent;
1157 			}
1158 			show_panel(view->panel);
1159 			if (view->child && view_is_splitscreen(view->child))
1160 				show_panel(view->child->panel);
1161 			if (view->parent && view_is_splitscreen(view)) {
1162 				err = view->parent->show(view->parent);
1163 				if (err)
1164 					goto done;
1165 			}
1166 			err = view->show(view);
1167 			if (err)
1168 				goto done;
1169 			if (view->child) {
1170 				err = view->child->show(view->child);
1171 				if (err)
1172 					goto done;
1173 			}
1174 			update_panels();
1175 			doupdate();
1176 		}
1177 	}
1178 done:
1179 	while (!TAILQ_EMPTY(&views)) {
1180 		view = TAILQ_FIRST(&views);
1181 		TAILQ_REMOVE(&views, view, entry);
1182 		view_close(view);
1183 	}
1184 
1185 	errcode = pthread_mutex_unlock(&tog_mutex);
1186 	if (errcode && err == NULL)
1187 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1188 
1189 	return err;
1190 }
1191 
1192 __dead static void
1193 usage_log(void)
1194 {
1195 	endwin();
1196 	fprintf(stderr,
1197 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1198 	    getprogname());
1199 	exit(1);
1200 }
1201 
1202 /* Create newly allocated wide-character string equivalent to a byte string. */
1203 static const struct got_error *
1204 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1205 {
1206 	char *vis = NULL;
1207 	const struct got_error *err = NULL;
1208 
1209 	*ws = NULL;
1210 	*wlen = mbstowcs(NULL, s, 0);
1211 	if (*wlen == (size_t)-1) {
1212 		int vislen;
1213 		if (errno != EILSEQ)
1214 			return got_error_from_errno("mbstowcs");
1215 
1216 		/* byte string invalid in current encoding; try to "fix" it */
1217 		err = got_mbsavis(&vis, &vislen, s);
1218 		if (err)
1219 			return err;
1220 		*wlen = mbstowcs(NULL, vis, 0);
1221 		if (*wlen == (size_t)-1) {
1222 			err = got_error_from_errno("mbstowcs"); /* give up */
1223 			goto done;
1224 		}
1225 	}
1226 
1227 	*ws = calloc(*wlen + 1, sizeof(**ws));
1228 	if (*ws == NULL) {
1229 		err = got_error_from_errno("calloc");
1230 		goto done;
1231 	}
1232 
1233 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1234 		err = got_error_from_errno("mbstowcs");
1235 done:
1236 	free(vis);
1237 	if (err) {
1238 		free(*ws);
1239 		*ws = NULL;
1240 		*wlen = 0;
1241 	}
1242 	return err;
1243 }
1244 
1245 static const struct got_error *
1246 expand_tab(char **ptr, const char *src)
1247 {
1248 	char	*dst;
1249 	size_t	 len, n, idx = 0, sz = 0;
1250 
1251 	*ptr = NULL;
1252 	n = len = strlen(src);
1253 	dst = malloc(n + 1);
1254 	if (dst == NULL)
1255 		return got_error_from_errno("malloc");
1256 
1257 	while (idx < len && src[idx]) {
1258 		const char c = src[idx];
1259 
1260 		if (c == '\t') {
1261 			size_t nb = TABSIZE - sz % TABSIZE;
1262 			char *p;
1263 
1264 			p = realloc(dst, n + nb);
1265 			if (p == NULL) {
1266 				free(dst);
1267 				return got_error_from_errno("realloc");
1268 
1269 			}
1270 			dst = p;
1271 			n += nb;
1272 			memset(dst + sz, ' ', nb);
1273 			sz += nb;
1274 		} else
1275 			dst[sz++] = src[idx];
1276 		++idx;
1277 	}
1278 
1279 	dst[sz] = '\0';
1280 	*ptr = dst;
1281 	return NULL;
1282 }
1283 
1284 /*
1285  * Advance at most n columns from wline starting at offset off.
1286  * Return the index to the first character after the span operation.
1287  * Return the combined column width of all spanned wide character in
1288  * *rcol.
1289  */
1290 static int
1291 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1292 {
1293 	int width, i, cols = 0;
1294 
1295 	if (n == 0) {
1296 		*rcol = cols;
1297 		return off;
1298 	}
1299 
1300 	for (i = off; wline[i] != L'\0'; ++i) {
1301 		if (wline[i] == L'\t')
1302 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1303 		else
1304 			width = wcwidth(wline[i]);
1305 
1306 		if (width == -1) {
1307 			width = 1;
1308 			wline[i] = L'.';
1309 		}
1310 
1311 		if (cols + width > n)
1312 			break;
1313 		cols += width;
1314 	}
1315 
1316 	*rcol = cols;
1317 	return i;
1318 }
1319 
1320 /*
1321  * Format a line for display, ensuring that it won't overflow a width limit.
1322  * With scrolling, the width returned refers to the scrolled version of the
1323  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1324  */
1325 static const struct got_error *
1326 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1327     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1328 {
1329 	const struct got_error *err = NULL;
1330 	int cols;
1331 	wchar_t *wline = NULL;
1332 	char *exstr = NULL;
1333 	size_t wlen;
1334 	int i, scrollx;
1335 
1336 	*wlinep = NULL;
1337 	*widthp = 0;
1338 
1339 	if (expand) {
1340 		err = expand_tab(&exstr, line);
1341 		if (err)
1342 			return err;
1343 	}
1344 
1345 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1346 	free(exstr);
1347 	if (err)
1348 		return err;
1349 
1350 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1351 
1352 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1353 		wline[wlen - 1] = L'\0';
1354 		wlen--;
1355 	}
1356 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1357 		wline[wlen - 1] = L'\0';
1358 		wlen--;
1359 	}
1360 
1361 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1362 	wline[i] = L'\0';
1363 
1364 	if (widthp)
1365 		*widthp = cols;
1366 	if (scrollxp)
1367 		*scrollxp = scrollx;
1368 	if (err)
1369 		free(wline);
1370 	else
1371 		*wlinep = wline;
1372 	return err;
1373 }
1374 
1375 static const struct got_error*
1376 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1377     struct got_object_id *id, struct got_repository *repo)
1378 {
1379 	static const struct got_error *err = NULL;
1380 	struct got_reflist_entry *re;
1381 	char *s;
1382 	const char *name;
1383 
1384 	*refs_str = NULL;
1385 
1386 	TAILQ_FOREACH(re, refs, entry) {
1387 		struct got_tag_object *tag = NULL;
1388 		struct got_object_id *ref_id;
1389 		int cmp;
1390 
1391 		name = got_ref_get_name(re->ref);
1392 		if (strcmp(name, GOT_REF_HEAD) == 0)
1393 			continue;
1394 		if (strncmp(name, "refs/", 5) == 0)
1395 			name += 5;
1396 		if (strncmp(name, "got/", 4) == 0 &&
1397 		    strncmp(name, "got/backup/", 11) != 0)
1398 			continue;
1399 		if (strncmp(name, "heads/", 6) == 0)
1400 			name += 6;
1401 		if (strncmp(name, "remotes/", 8) == 0) {
1402 			name += 8;
1403 			s = strstr(name, "/" GOT_REF_HEAD);
1404 			if (s != NULL && s[strlen(s)] == '\0')
1405 				continue;
1406 		}
1407 		err = got_ref_resolve(&ref_id, repo, re->ref);
1408 		if (err)
1409 			break;
1410 		if (strncmp(name, "tags/", 5) == 0) {
1411 			err = got_object_open_as_tag(&tag, repo, ref_id);
1412 			if (err) {
1413 				if (err->code != GOT_ERR_OBJ_TYPE) {
1414 					free(ref_id);
1415 					break;
1416 				}
1417 				/* Ref points at something other than a tag. */
1418 				err = NULL;
1419 				tag = NULL;
1420 			}
1421 		}
1422 		cmp = got_object_id_cmp(tag ?
1423 		    got_object_tag_get_object_id(tag) : ref_id, id);
1424 		free(ref_id);
1425 		if (tag)
1426 			got_object_tag_close(tag);
1427 		if (cmp != 0)
1428 			continue;
1429 		s = *refs_str;
1430 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1431 		    s ? ", " : "", name) == -1) {
1432 			err = got_error_from_errno("asprintf");
1433 			free(s);
1434 			*refs_str = NULL;
1435 			break;
1436 		}
1437 		free(s);
1438 	}
1439 
1440 	return err;
1441 }
1442 
1443 static const struct got_error *
1444 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1445     int col_tab_align)
1446 {
1447 	char *smallerthan;
1448 
1449 	smallerthan = strchr(author, '<');
1450 	if (smallerthan && smallerthan[1] != '\0')
1451 		author = smallerthan + 1;
1452 	author[strcspn(author, "@>")] = '\0';
1453 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1454 	    col_tab_align, 0);
1455 }
1456 
1457 static const struct got_error *
1458 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1459     struct got_object_id *id, const size_t date_display_cols,
1460     int author_display_cols)
1461 {
1462 	struct tog_log_view_state *s = &view->state.log;
1463 	const struct got_error *err = NULL;
1464 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1465 	char *logmsg0 = NULL, *logmsg = NULL;
1466 	char *author = NULL;
1467 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1468 	int author_width, logmsg_width;
1469 	char *newline, *line = NULL;
1470 	int col, limit, scrollx;
1471 	const int avail = view->ncols;
1472 	struct tm tm;
1473 	time_t committer_time;
1474 	struct tog_color *tc;
1475 
1476 	committer_time = got_object_commit_get_committer_time(commit);
1477 	if (gmtime_r(&committer_time, &tm) == NULL)
1478 		return got_error_from_errno("gmtime_r");
1479 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1480 		return got_error(GOT_ERR_NO_SPACE);
1481 
1482 	if (avail <= date_display_cols)
1483 		limit = MIN(sizeof(datebuf) - 1, avail);
1484 	else
1485 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1486 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1487 	if (tc)
1488 		wattr_on(view->window,
1489 		    COLOR_PAIR(tc->colorpair), NULL);
1490 	waddnstr(view->window, datebuf, limit);
1491 	if (tc)
1492 		wattr_off(view->window,
1493 		    COLOR_PAIR(tc->colorpair), NULL);
1494 	col = limit;
1495 	if (col > avail)
1496 		goto done;
1497 
1498 	if (avail >= 120) {
1499 		char *id_str;
1500 		err = got_object_id_str(&id_str, id);
1501 		if (err)
1502 			goto done;
1503 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1504 		if (tc)
1505 			wattr_on(view->window,
1506 			    COLOR_PAIR(tc->colorpair), NULL);
1507 		wprintw(view->window, "%.8s ", id_str);
1508 		if (tc)
1509 			wattr_off(view->window,
1510 			    COLOR_PAIR(tc->colorpair), NULL);
1511 		free(id_str);
1512 		col += 9;
1513 		if (col > avail)
1514 			goto done;
1515 	}
1516 
1517 	author = strdup(got_object_commit_get_author(commit));
1518 	if (author == NULL) {
1519 		err = got_error_from_errno("strdup");
1520 		goto done;
1521 	}
1522 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1523 	if (err)
1524 		goto done;
1525 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1526 	if (tc)
1527 		wattr_on(view->window,
1528 		    COLOR_PAIR(tc->colorpair), NULL);
1529 	waddwstr(view->window, wauthor);
1530 	if (tc)
1531 		wattr_off(view->window,
1532 		    COLOR_PAIR(tc->colorpair), NULL);
1533 	col += author_width;
1534 	while (col < avail && author_width < author_display_cols + 2) {
1535 		waddch(view->window, ' ');
1536 		col++;
1537 		author_width++;
1538 	}
1539 	if (col > avail)
1540 		goto done;
1541 
1542 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1543 	if (err)
1544 		goto done;
1545 	logmsg = logmsg0;
1546 	while (*logmsg == '\n')
1547 		logmsg++;
1548 	newline = strchr(logmsg, '\n');
1549 	if (newline)
1550 		*newline = '\0';
1551 	limit = avail - col;
1552 	if (view->child && limit > 0)
1553 		limit--;	/* for the border */
1554 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
1555 	    limit, col, 1);
1556 	if (err)
1557 		goto done;
1558 	waddwstr(view->window, &wlogmsg[scrollx]);
1559 	col += MAX(logmsg_width, 0);
1560 	while (col < avail) {
1561 		waddch(view->window, ' ');
1562 		col++;
1563 	}
1564 done:
1565 	free(logmsg0);
1566 	free(wlogmsg);
1567 	free(author);
1568 	free(wauthor);
1569 	free(line);
1570 	return err;
1571 }
1572 
1573 static struct commit_queue_entry *
1574 alloc_commit_queue_entry(struct got_commit_object *commit,
1575     struct got_object_id *id)
1576 {
1577 	struct commit_queue_entry *entry;
1578 
1579 	entry = calloc(1, sizeof(*entry));
1580 	if (entry == NULL)
1581 		return NULL;
1582 
1583 	entry->id = id;
1584 	entry->commit = commit;
1585 	return entry;
1586 }
1587 
1588 static void
1589 pop_commit(struct commit_queue *commits)
1590 {
1591 	struct commit_queue_entry *entry;
1592 
1593 	entry = TAILQ_FIRST(&commits->head);
1594 	TAILQ_REMOVE(&commits->head, entry, entry);
1595 	got_object_commit_close(entry->commit);
1596 	commits->ncommits--;
1597 	/* Don't free entry->id! It is owned by the commit graph. */
1598 	free(entry);
1599 }
1600 
1601 static void
1602 free_commits(struct commit_queue *commits)
1603 {
1604 	while (!TAILQ_EMPTY(&commits->head))
1605 		pop_commit(commits);
1606 }
1607 
1608 static const struct got_error *
1609 match_commit(int *have_match, struct got_object_id *id,
1610     struct got_commit_object *commit, regex_t *regex)
1611 {
1612 	const struct got_error *err = NULL;
1613 	regmatch_t regmatch;
1614 	char *id_str = NULL, *logmsg = NULL;
1615 
1616 	*have_match = 0;
1617 
1618 	err = got_object_id_str(&id_str, id);
1619 	if (err)
1620 		return err;
1621 
1622 	err = got_object_commit_get_logmsg(&logmsg, commit);
1623 	if (err)
1624 		goto done;
1625 
1626 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1627 	    &regmatch, 0) == 0 ||
1628 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1629 	    &regmatch, 0) == 0 ||
1630 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1631 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1632 		*have_match = 1;
1633 done:
1634 	free(id_str);
1635 	free(logmsg);
1636 	return err;
1637 }
1638 
1639 static const struct got_error *
1640 queue_commits(struct tog_log_thread_args *a)
1641 {
1642 	const struct got_error *err = NULL;
1643 
1644 	/*
1645 	 * We keep all commits open throughout the lifetime of the log
1646 	 * view in order to avoid having to re-fetch commits from disk
1647 	 * while updating the display.
1648 	 */
1649 	do {
1650 		struct got_object_id *id;
1651 		struct got_commit_object *commit;
1652 		struct commit_queue_entry *entry;
1653 		int errcode;
1654 
1655 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
1656 		    NULL, NULL);
1657 		if (err || id == NULL)
1658 			break;
1659 
1660 		err = got_object_open_as_commit(&commit, a->repo, id);
1661 		if (err)
1662 			break;
1663 		entry = alloc_commit_queue_entry(commit, id);
1664 		if (entry == NULL) {
1665 			err = got_error_from_errno("alloc_commit_queue_entry");
1666 			break;
1667 		}
1668 
1669 		errcode = pthread_mutex_lock(&tog_mutex);
1670 		if (errcode) {
1671 			err = got_error_set_errno(errcode,
1672 			    "pthread_mutex_lock");
1673 			break;
1674 		}
1675 
1676 		entry->idx = a->commits->ncommits;
1677 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
1678 		a->commits->ncommits++;
1679 
1680 		if (*a->searching == TOG_SEARCH_FORWARD &&
1681 		    !*a->search_next_done) {
1682 			int have_match;
1683 			err = match_commit(&have_match, id, commit, a->regex);
1684 			if (err)
1685 				break;
1686 			if (have_match)
1687 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
1688 		}
1689 
1690 		errcode = pthread_mutex_unlock(&tog_mutex);
1691 		if (errcode && err == NULL)
1692 			err = got_error_set_errno(errcode,
1693 			    "pthread_mutex_unlock");
1694 		if (err)
1695 			break;
1696 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
1697 
1698 	return err;
1699 }
1700 
1701 static void
1702 select_commit(struct tog_log_view_state *s)
1703 {
1704 	struct commit_queue_entry *entry;
1705 	int ncommits = 0;
1706 
1707 	entry = s->first_displayed_entry;
1708 	while (entry) {
1709 		if (ncommits == s->selected) {
1710 			s->selected_entry = entry;
1711 			break;
1712 		}
1713 		entry = TAILQ_NEXT(entry, entry);
1714 		ncommits++;
1715 	}
1716 }
1717 
1718 static const struct got_error *
1719 draw_commits(struct tog_view *view)
1720 {
1721 	const struct got_error *err = NULL;
1722 	struct tog_log_view_state *s = &view->state.log;
1723 	struct commit_queue_entry *entry = s->selected_entry;
1724 	const int limit = view->nlines;
1725 	int width;
1726 	int ncommits, author_cols = 4;
1727 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1728 	char *refs_str = NULL;
1729 	wchar_t *wline;
1730 	struct tog_color *tc;
1731 	static const size_t date_display_cols = 12;
1732 
1733 	if (s->selected_entry &&
1734 	    !(view->searching && view->search_next_done == 0)) {
1735 		struct got_reflist_head *refs;
1736 		err = got_object_id_str(&id_str, s->selected_entry->id);
1737 		if (err)
1738 			return err;
1739 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
1740 		    s->selected_entry->id);
1741 		if (refs) {
1742 			err = build_refs_str(&refs_str, refs,
1743 			    s->selected_entry->id, s->repo);
1744 			if (err)
1745 				goto done;
1746 		}
1747 	}
1748 
1749 	if (s->thread_args.commits_needed == 0)
1750 		halfdelay(10); /* disable fast refresh */
1751 
1752 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
1753 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1754 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1755 		    (view->searching && !view->search_next_done) ?
1756 		    "searching..." : "loading...") == -1) {
1757 			err = got_error_from_errno("asprintf");
1758 			goto done;
1759 		}
1760 	} else {
1761 		const char *search_str = NULL;
1762 
1763 		if (view->searching) {
1764 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1765 				search_str = "no more matches";
1766 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1767 				search_str = "no matches found";
1768 			else if (!view->search_next_done)
1769 				search_str = "searching...";
1770 		}
1771 
1772 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1773 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1774 		    search_str ? search_str :
1775 		    (refs_str ? refs_str : "")) == -1) {
1776 			err = got_error_from_errno("asprintf");
1777 			goto done;
1778 		}
1779 	}
1780 
1781 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1782 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
1783 		    "........................................",
1784 		    s->in_repo_path, ncommits_str) == -1) {
1785 			err = got_error_from_errno("asprintf");
1786 			header = NULL;
1787 			goto done;
1788 		}
1789 	} else if (asprintf(&header, "commit %s%s",
1790 	    id_str ? id_str : "........................................",
1791 	    ncommits_str) == -1) {
1792 		err = got_error_from_errno("asprintf");
1793 		header = NULL;
1794 		goto done;
1795 	}
1796 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
1797 	if (err)
1798 		goto done;
1799 
1800 	werase(view->window);
1801 
1802 	if (view_needs_focus_indication(view))
1803 		wstandout(view->window);
1804 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1805 	if (tc)
1806 		wattr_on(view->window,
1807 		    COLOR_PAIR(tc->colorpair), NULL);
1808 	waddwstr(view->window, wline);
1809 	if (tc)
1810 		wattr_off(view->window,
1811 		    COLOR_PAIR(tc->colorpair), NULL);
1812 	while (width < view->ncols) {
1813 		waddch(view->window, ' ');
1814 		width++;
1815 	}
1816 	if (view_needs_focus_indication(view))
1817 		wstandend(view->window);
1818 	free(wline);
1819 	if (limit <= 1)
1820 		goto done;
1821 
1822 	/* Grow author column size if necessary, and set view->maxx. */
1823 	entry = s->first_displayed_entry;
1824 	ncommits = 0;
1825 	view->maxx = 0;
1826 	while (entry) {
1827 		char *author, *eol, *msg, *msg0;
1828 		wchar_t *wauthor, *wmsg;
1829 		int width;
1830 		if (ncommits >= limit - 1)
1831 			break;
1832 		author = strdup(got_object_commit_get_author(entry->commit));
1833 		if (author == NULL) {
1834 			err = got_error_from_errno("strdup");
1835 			goto done;
1836 		}
1837 		err = format_author(&wauthor, &width, author, COLS,
1838 		    date_display_cols);
1839 		if (author_cols < width)
1840 			author_cols = width;
1841 		free(wauthor);
1842 		free(author);
1843 		err = got_object_commit_get_logmsg(&msg0, entry->commit);
1844 		if (err)
1845 			goto done;
1846 		msg = msg0;
1847 		while (*msg == '\n')
1848 			++msg;
1849 		if ((eol = strchr(msg, '\n')))
1850 			*eol = '\0';
1851 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
1852 		    date_display_cols + author_cols, 0);
1853 		if (err)
1854 			goto done;
1855 		view->maxx = MAX(view->maxx, width);
1856 		free(msg0);
1857 		free(wmsg);
1858 		ncommits++;
1859 		entry = TAILQ_NEXT(entry, entry);
1860 	}
1861 
1862 	entry = s->first_displayed_entry;
1863 	s->last_displayed_entry = s->first_displayed_entry;
1864 	ncommits = 0;
1865 	while (entry) {
1866 		if (ncommits >= limit - 1)
1867 			break;
1868 		if (ncommits == s->selected)
1869 			wstandout(view->window);
1870 		err = draw_commit(view, entry->commit, entry->id,
1871 		    date_display_cols, author_cols);
1872 		if (ncommits == s->selected)
1873 			wstandend(view->window);
1874 		if (err)
1875 			goto done;
1876 		ncommits++;
1877 		s->last_displayed_entry = entry;
1878 		entry = TAILQ_NEXT(entry, entry);
1879 	}
1880 
1881 	view_vborder(view);
1882 	update_panels();
1883 	doupdate();
1884 done:
1885 	free(id_str);
1886 	free(refs_str);
1887 	free(ncommits_str);
1888 	free(header);
1889 	return err;
1890 }
1891 
1892 static void
1893 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
1894 {
1895 	struct commit_queue_entry *entry;
1896 	int nscrolled = 0;
1897 
1898 	entry = TAILQ_FIRST(&s->commits.head);
1899 	if (s->first_displayed_entry == entry)
1900 		return;
1901 
1902 	entry = s->first_displayed_entry;
1903 	while (entry && nscrolled < maxscroll) {
1904 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1905 		if (entry) {
1906 			s->first_displayed_entry = entry;
1907 			nscrolled++;
1908 		}
1909 	}
1910 }
1911 
1912 static const struct got_error *
1913 trigger_log_thread(struct tog_view *view, int wait)
1914 {
1915 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1916 	int errcode;
1917 
1918 	halfdelay(1); /* fast refresh while loading commits */
1919 
1920 	while (ta->commits_needed > 0 || ta->load_all) {
1921 		if (ta->log_complete)
1922 			break;
1923 
1924 		/* Wake the log thread. */
1925 		errcode = pthread_cond_signal(&ta->need_commits);
1926 		if (errcode)
1927 			return got_error_set_errno(errcode,
1928 			    "pthread_cond_signal");
1929 
1930 		/*
1931 		 * The mutex will be released while the view loop waits
1932 		 * in wgetch(), at which time the log thread will run.
1933 		 */
1934 		if (!wait)
1935 			break;
1936 
1937 		/* Display progress update in log view. */
1938 		show_log_view(view);
1939 		update_panels();
1940 		doupdate();
1941 
1942 		/* Wait right here while next commit is being loaded. */
1943 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1944 		if (errcode)
1945 			return got_error_set_errno(errcode,
1946 			    "pthread_cond_wait");
1947 
1948 		/* Display progress update in log view. */
1949 		show_log_view(view);
1950 		update_panels();
1951 		doupdate();
1952 	}
1953 
1954 	return NULL;
1955 }
1956 
1957 static const struct got_error *
1958 log_scroll_down(struct tog_view *view, int maxscroll)
1959 {
1960 	struct tog_log_view_state *s = &view->state.log;
1961 	const struct got_error *err = NULL;
1962 	struct commit_queue_entry *pentry;
1963 	int nscrolled = 0, ncommits_needed;
1964 
1965 	if (s->last_displayed_entry == NULL)
1966 		return NULL;
1967 
1968 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
1969 	if (s->commits.ncommits < ncommits_needed &&
1970 	    !s->thread_args.log_complete) {
1971 		/*
1972 		 * Ask the log thread for required amount of commits.
1973 		 */
1974 		s->thread_args.commits_needed += maxscroll;
1975 		err = trigger_log_thread(view, 1);
1976 		if (err)
1977 			return err;
1978 	}
1979 
1980 	do {
1981 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1982 		if (pentry == NULL)
1983 			break;
1984 
1985 		s->last_displayed_entry = pentry;
1986 
1987 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1988 		if (pentry == NULL)
1989 			break;
1990 		s->first_displayed_entry = pentry;
1991 	} while (++nscrolled < maxscroll);
1992 
1993 	return err;
1994 }
1995 
1996 static const struct got_error *
1997 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1998     struct got_commit_object *commit, struct got_object_id *commit_id,
1999     struct tog_view *log_view, struct got_repository *repo)
2000 {
2001 	const struct got_error *err;
2002 	struct got_object_qid *parent_id;
2003 	struct tog_view *diff_view;
2004 
2005 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
2006 	if (diff_view == NULL)
2007 		return got_error_from_errno("view_open");
2008 
2009 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2010 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2011 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2012 	if (err == NULL)
2013 		*new_view = diff_view;
2014 	return err;
2015 }
2016 
2017 static const struct got_error *
2018 tree_view_visit_subtree(struct tog_tree_view_state *s,
2019     struct got_tree_object *subtree)
2020 {
2021 	struct tog_parent_tree *parent;
2022 
2023 	parent = calloc(1, sizeof(*parent));
2024 	if (parent == NULL)
2025 		return got_error_from_errno("calloc");
2026 
2027 	parent->tree = s->tree;
2028 	parent->first_displayed_entry = s->first_displayed_entry;
2029 	parent->selected_entry = s->selected_entry;
2030 	parent->selected = s->selected;
2031 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2032 	s->tree = subtree;
2033 	s->selected = 0;
2034 	s->first_displayed_entry = NULL;
2035 	return NULL;
2036 }
2037 
2038 static const struct got_error *
2039 tree_view_walk_path(struct tog_tree_view_state *s,
2040     struct got_commit_object *commit, const char *path)
2041 {
2042 	const struct got_error *err = NULL;
2043 	struct got_tree_object *tree = NULL;
2044 	const char *p;
2045 	char *slash, *subpath = NULL;
2046 
2047 	/* Walk the path and open corresponding tree objects. */
2048 	p = path;
2049 	while (*p) {
2050 		struct got_tree_entry *te;
2051 		struct got_object_id *tree_id;
2052 		char *te_name;
2053 
2054 		while (p[0] == '/')
2055 			p++;
2056 
2057 		/* Ensure the correct subtree entry is selected. */
2058 		slash = strchr(p, '/');
2059 		if (slash == NULL)
2060 			te_name = strdup(p);
2061 		else
2062 			te_name = strndup(p, slash - p);
2063 		if (te_name == NULL) {
2064 			err = got_error_from_errno("strndup");
2065 			break;
2066 		}
2067 		te = got_object_tree_find_entry(s->tree, te_name);
2068 		if (te == NULL) {
2069 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2070 			free(te_name);
2071 			break;
2072 		}
2073 		free(te_name);
2074 		s->first_displayed_entry = s->selected_entry = te;
2075 
2076 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2077 			break; /* jump to this file's entry */
2078 
2079 		slash = strchr(p, '/');
2080 		if (slash)
2081 			subpath = strndup(path, slash - path);
2082 		else
2083 			subpath = strdup(path);
2084 		if (subpath == NULL) {
2085 			err = got_error_from_errno("strdup");
2086 			break;
2087 		}
2088 
2089 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2090 		    subpath);
2091 		if (err)
2092 			break;
2093 
2094 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2095 		free(tree_id);
2096 		if (err)
2097 			break;
2098 
2099 		err = tree_view_visit_subtree(s, tree);
2100 		if (err) {
2101 			got_object_tree_close(tree);
2102 			break;
2103 		}
2104 		if (slash == NULL)
2105 			break;
2106 		free(subpath);
2107 		subpath = NULL;
2108 		p = slash;
2109 	}
2110 
2111 	free(subpath);
2112 	return err;
2113 }
2114 
2115 static const struct got_error *
2116 browse_commit_tree(struct tog_view **new_view, int begin_x,
2117     struct commit_queue_entry *entry, const char *path,
2118     const char *head_ref_name, struct got_repository *repo)
2119 {
2120 	const struct got_error *err = NULL;
2121 	struct tog_tree_view_state *s;
2122 	struct tog_view *tree_view;
2123 
2124 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
2125 	if (tree_view == NULL)
2126 		return got_error_from_errno("view_open");
2127 
2128 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2129 	if (err)
2130 		return err;
2131 	s = &tree_view->state.tree;
2132 
2133 	*new_view = tree_view;
2134 
2135 	if (got_path_is_root_dir(path))
2136 		return NULL;
2137 
2138 	return tree_view_walk_path(s, entry->commit, path);
2139 }
2140 
2141 static const struct got_error *
2142 block_signals_used_by_main_thread(void)
2143 {
2144 	sigset_t sigset;
2145 	int errcode;
2146 
2147 	if (sigemptyset(&sigset) == -1)
2148 		return got_error_from_errno("sigemptyset");
2149 
2150 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2151 	if (sigaddset(&sigset, SIGWINCH) == -1)
2152 		return got_error_from_errno("sigaddset");
2153 	if (sigaddset(&sigset, SIGCONT) == -1)
2154 		return got_error_from_errno("sigaddset");
2155 	if (sigaddset(&sigset, SIGINT) == -1)
2156 		return got_error_from_errno("sigaddset");
2157 	if (sigaddset(&sigset, SIGTERM) == -1)
2158 		return got_error_from_errno("sigaddset");
2159 
2160 	/* ncurses handles SIGTSTP */
2161 	if (sigaddset(&sigset, SIGTSTP) == -1)
2162 		return got_error_from_errno("sigaddset");
2163 
2164 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2165 	if (errcode)
2166 		return got_error_set_errno(errcode, "pthread_sigmask");
2167 
2168 	return NULL;
2169 }
2170 
2171 static void *
2172 log_thread(void *arg)
2173 {
2174 	const struct got_error *err = NULL;
2175 	int errcode = 0;
2176 	struct tog_log_thread_args *a = arg;
2177 	int done = 0;
2178 
2179 	err = block_signals_used_by_main_thread();
2180 	if (err)
2181 		return (void *)err;
2182 
2183 	while (!done && !err && !tog_fatal_signal_received()) {
2184 		err = queue_commits(a);
2185 		if (err) {
2186 			if (err->code != GOT_ERR_ITER_COMPLETED)
2187 				return (void *)err;
2188 			err = NULL;
2189 			done = 1;
2190 		} else if (a->commits_needed > 0 && !a->load_all)
2191 			a->commits_needed--;
2192 
2193 		errcode = pthread_mutex_lock(&tog_mutex);
2194 		if (errcode) {
2195 			err = got_error_set_errno(errcode,
2196 			    "pthread_mutex_lock");
2197 			break;
2198 		} else if (*a->quit)
2199 			done = 1;
2200 		else if (*a->first_displayed_entry == NULL) {
2201 			*a->first_displayed_entry =
2202 			    TAILQ_FIRST(&a->commits->head);
2203 			*a->selected_entry = *a->first_displayed_entry;
2204 		}
2205 
2206 		errcode = pthread_cond_signal(&a->commit_loaded);
2207 		if (errcode) {
2208 			err = got_error_set_errno(errcode,
2209 			    "pthread_cond_signal");
2210 			pthread_mutex_unlock(&tog_mutex);
2211 			break;
2212 		}
2213 
2214 		if (done)
2215 			a->commits_needed = 0;
2216 		else {
2217 			if (a->commits_needed == 0 && !a->load_all) {
2218 				errcode = pthread_cond_wait(&a->need_commits,
2219 				    &tog_mutex);
2220 				if (errcode)
2221 					err = got_error_set_errno(errcode,
2222 					    "pthread_cond_wait");
2223 				if (*a->quit)
2224 					done = 1;
2225 			}
2226 		}
2227 
2228 		errcode = pthread_mutex_unlock(&tog_mutex);
2229 		if (errcode && err == NULL)
2230 			err = got_error_set_errno(errcode,
2231 			    "pthread_mutex_unlock");
2232 	}
2233 	a->log_complete = 1;
2234 	return (void *)err;
2235 }
2236 
2237 static const struct got_error *
2238 stop_log_thread(struct tog_log_view_state *s)
2239 {
2240 	const struct got_error *err = NULL;
2241 	int errcode;
2242 
2243 	if (s->thread) {
2244 		s->quit = 1;
2245 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2246 		if (errcode)
2247 			return got_error_set_errno(errcode,
2248 			    "pthread_cond_signal");
2249 		errcode = pthread_mutex_unlock(&tog_mutex);
2250 		if (errcode)
2251 			return got_error_set_errno(errcode,
2252 			    "pthread_mutex_unlock");
2253 		errcode = pthread_join(s->thread, (void **)&err);
2254 		if (errcode)
2255 			return got_error_set_errno(errcode, "pthread_join");
2256 		errcode = pthread_mutex_lock(&tog_mutex);
2257 		if (errcode)
2258 			return got_error_set_errno(errcode,
2259 			    "pthread_mutex_lock");
2260 		s->thread = 0; //NULL;
2261 	}
2262 
2263 	if (s->thread_args.repo) {
2264 		err = got_repo_close(s->thread_args.repo);
2265 		s->thread_args.repo = NULL;
2266 	}
2267 
2268 	if (s->thread_args.pack_fds) {
2269 		const struct got_error *pack_err =
2270 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2271 		if (err == NULL)
2272 			err = pack_err;
2273 		s->thread_args.pack_fds = NULL;
2274 	}
2275 
2276 	if (s->thread_args.graph) {
2277 		got_commit_graph_close(s->thread_args.graph);
2278 		s->thread_args.graph = NULL;
2279 	}
2280 
2281 	return err;
2282 }
2283 
2284 static const struct got_error *
2285 close_log_view(struct tog_view *view)
2286 {
2287 	const struct got_error *err = NULL;
2288 	struct tog_log_view_state *s = &view->state.log;
2289 	int errcode;
2290 
2291 	err = stop_log_thread(s);
2292 
2293 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2294 	if (errcode && err == NULL)
2295 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2296 
2297 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2298 	if (errcode && err == NULL)
2299 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2300 
2301 	free_commits(&s->commits);
2302 	free(s->in_repo_path);
2303 	s->in_repo_path = NULL;
2304 	free(s->start_id);
2305 	s->start_id = NULL;
2306 	free(s->head_ref_name);
2307 	s->head_ref_name = NULL;
2308 	return err;
2309 }
2310 
2311 static const struct got_error *
2312 search_start_log_view(struct tog_view *view)
2313 {
2314 	struct tog_log_view_state *s = &view->state.log;
2315 
2316 	s->matched_entry = NULL;
2317 	s->search_entry = NULL;
2318 	return NULL;
2319 }
2320 
2321 static const struct got_error *
2322 search_next_log_view(struct tog_view *view)
2323 {
2324 	const struct got_error *err = NULL;
2325 	struct tog_log_view_state *s = &view->state.log;
2326 	struct commit_queue_entry *entry;
2327 
2328 	/* Display progress update in log view. */
2329 	show_log_view(view);
2330 	update_panels();
2331 	doupdate();
2332 
2333 	if (s->search_entry) {
2334 		int errcode, ch;
2335 		errcode = pthread_mutex_unlock(&tog_mutex);
2336 		if (errcode)
2337 			return got_error_set_errno(errcode,
2338 			    "pthread_mutex_unlock");
2339 		ch = wgetch(view->window);
2340 		errcode = pthread_mutex_lock(&tog_mutex);
2341 		if (errcode)
2342 			return got_error_set_errno(errcode,
2343 			    "pthread_mutex_lock");
2344 		if (ch == KEY_BACKSPACE) {
2345 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2346 			return NULL;
2347 		}
2348 		if (view->searching == TOG_SEARCH_FORWARD)
2349 			entry = TAILQ_NEXT(s->search_entry, entry);
2350 		else
2351 			entry = TAILQ_PREV(s->search_entry,
2352 			    commit_queue_head, entry);
2353 	} else if (s->matched_entry) {
2354 		if (view->searching == TOG_SEARCH_FORWARD)
2355 			entry = TAILQ_NEXT(s->matched_entry, entry);
2356 		else
2357 			entry = TAILQ_PREV(s->matched_entry,
2358 			    commit_queue_head, entry);
2359 	} else {
2360 		entry = s->selected_entry;
2361 	}
2362 
2363 	while (1) {
2364 		int have_match = 0;
2365 
2366 		if (entry == NULL) {
2367 			if (s->thread_args.log_complete ||
2368 			    view->searching == TOG_SEARCH_BACKWARD) {
2369 				view->search_next_done =
2370 				    (s->matched_entry == NULL ?
2371 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2372 				s->search_entry = NULL;
2373 				return NULL;
2374 			}
2375 			/*
2376 			 * Poke the log thread for more commits and return,
2377 			 * allowing the main loop to make progress. Search
2378 			 * will resume at s->search_entry once we come back.
2379 			 */
2380 			s->thread_args.commits_needed++;
2381 			return trigger_log_thread(view, 0);
2382 		}
2383 
2384 		err = match_commit(&have_match, entry->id, entry->commit,
2385 		    &view->regex);
2386 		if (err)
2387 			break;
2388 		if (have_match) {
2389 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2390 			s->matched_entry = entry;
2391 			break;
2392 		}
2393 
2394 		s->search_entry = entry;
2395 		if (view->searching == TOG_SEARCH_FORWARD)
2396 			entry = TAILQ_NEXT(entry, entry);
2397 		else
2398 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2399 	}
2400 
2401 	if (s->matched_entry) {
2402 		int cur = s->selected_entry->idx;
2403 		while (cur < s->matched_entry->idx) {
2404 			err = input_log_view(NULL, view, KEY_DOWN);
2405 			if (err)
2406 				return err;
2407 			cur++;
2408 		}
2409 		while (cur > s->matched_entry->idx) {
2410 			err = input_log_view(NULL, view, KEY_UP);
2411 			if (err)
2412 				return err;
2413 			cur--;
2414 		}
2415 	}
2416 
2417 	s->search_entry = NULL;
2418 
2419 	return NULL;
2420 }
2421 
2422 static const struct got_error *
2423 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2424     struct got_repository *repo, const char *head_ref_name,
2425     const char *in_repo_path, int log_branches)
2426 {
2427 	const struct got_error *err = NULL;
2428 	struct tog_log_view_state *s = &view->state.log;
2429 	struct got_repository *thread_repo = NULL;
2430 	struct got_commit_graph *thread_graph = NULL;
2431 	int errcode;
2432 
2433 	if (in_repo_path != s->in_repo_path) {
2434 		free(s->in_repo_path);
2435 		s->in_repo_path = strdup(in_repo_path);
2436 		if (s->in_repo_path == NULL)
2437 			return got_error_from_errno("strdup");
2438 	}
2439 
2440 	/* The commit queue only contains commits being displayed. */
2441 	TAILQ_INIT(&s->commits.head);
2442 	s->commits.ncommits = 0;
2443 
2444 	s->repo = repo;
2445 	if (head_ref_name) {
2446 		s->head_ref_name = strdup(head_ref_name);
2447 		if (s->head_ref_name == NULL) {
2448 			err = got_error_from_errno("strdup");
2449 			goto done;
2450 		}
2451 	}
2452 	s->start_id = got_object_id_dup(start_id);
2453 	if (s->start_id == NULL) {
2454 		err = got_error_from_errno("got_object_id_dup");
2455 		goto done;
2456 	}
2457 	s->log_branches = log_branches;
2458 
2459 	STAILQ_INIT(&s->colors);
2460 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2461 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2462 		    get_color_value("TOG_COLOR_COMMIT"));
2463 		if (err)
2464 			goto done;
2465 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2466 		    get_color_value("TOG_COLOR_AUTHOR"));
2467 		if (err) {
2468 			free_colors(&s->colors);
2469 			goto done;
2470 		}
2471 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2472 		    get_color_value("TOG_COLOR_DATE"));
2473 		if (err) {
2474 			free_colors(&s->colors);
2475 			goto done;
2476 		}
2477 	}
2478 
2479 	view->show = show_log_view;
2480 	view->input = input_log_view;
2481 	view->close = close_log_view;
2482 	view->search_start = search_start_log_view;
2483 	view->search_next = search_next_log_view;
2484 
2485 	if (s->thread_args.pack_fds == NULL) {
2486 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2487 		if (err)
2488 			goto done;
2489 	}
2490 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
2491 	    s->thread_args.pack_fds);
2492 	if (err)
2493 		goto done;
2494 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2495 	    !s->log_branches);
2496 	if (err)
2497 		goto done;
2498 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2499 	    s->repo, NULL, NULL);
2500 	if (err)
2501 		goto done;
2502 
2503 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2504 	if (errcode) {
2505 		err = got_error_set_errno(errcode, "pthread_cond_init");
2506 		goto done;
2507 	}
2508 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2509 	if (errcode) {
2510 		err = got_error_set_errno(errcode, "pthread_cond_init");
2511 		goto done;
2512 	}
2513 
2514 	s->thread_args.commits_needed = view->nlines;
2515 	s->thread_args.graph = thread_graph;
2516 	s->thread_args.commits = &s->commits;
2517 	s->thread_args.in_repo_path = s->in_repo_path;
2518 	s->thread_args.start_id = s->start_id;
2519 	s->thread_args.repo = thread_repo;
2520 	s->thread_args.log_complete = 0;
2521 	s->thread_args.quit = &s->quit;
2522 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2523 	s->thread_args.selected_entry = &s->selected_entry;
2524 	s->thread_args.searching = &view->searching;
2525 	s->thread_args.search_next_done = &view->search_next_done;
2526 	s->thread_args.regex = &view->regex;
2527 done:
2528 	if (err)
2529 		close_log_view(view);
2530 	return err;
2531 }
2532 
2533 static const struct got_error *
2534 show_log_view(struct tog_view *view)
2535 {
2536 	const struct got_error *err;
2537 	struct tog_log_view_state *s = &view->state.log;
2538 
2539 	if (s->thread == 0) { //NULL) {
2540 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2541 		    &s->thread_args);
2542 		if (errcode)
2543 			return got_error_set_errno(errcode, "pthread_create");
2544 		if (s->thread_args.commits_needed > 0) {
2545 			err = trigger_log_thread(view, 1);
2546 			if (err)
2547 				return err;
2548 		}
2549 	}
2550 
2551 	return draw_commits(view);
2552 }
2553 
2554 static const struct got_error *
2555 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
2556 {
2557 	const struct got_error *err = NULL;
2558 	struct tog_log_view_state *s = &view->state.log;
2559 	struct tog_view *diff_view = NULL, *tree_view = NULL;
2560 	struct tog_view *ref_view = NULL;
2561 	struct commit_queue_entry *entry;
2562 	int begin_x = 0, n, nscroll = view->nlines - 1;
2563 
2564 	if (s->thread_args.load_all) {
2565 		if (ch == KEY_BACKSPACE)
2566 			s->thread_args.load_all = 0;
2567 		else if (s->thread_args.log_complete) {
2568 			s->thread_args.load_all = 0;
2569 			log_scroll_down(view, s->commits.ncommits);
2570 			s->selected = MIN(view->nlines - 2,
2571 			    s->commits.ncommits - 1);
2572 			select_commit(s);
2573 		}
2574 		return NULL;
2575 	}
2576 
2577 	switch (ch) {
2578 	case 'q':
2579 		s->quit = 1;
2580 		break;
2581 	case '0':
2582 		view->x = 0;
2583 		break;
2584 	case '$':
2585 		view->x = MAX(view->maxx - view->ncols / 2, 0);
2586 		break;
2587 	case KEY_RIGHT:
2588 	case 'l':
2589 		if (view->x + view->ncols / 2 < view->maxx)
2590 			view->x += 2;  /* move two columns right */
2591 		break;
2592 	case KEY_LEFT:
2593 	case 'h':
2594 		view->x -= MIN(view->x, 2);  /* move two columns back */
2595 		break;
2596 	case 'k':
2597 	case KEY_UP:
2598 	case '<':
2599 	case ',':
2600 	case CTRL('p'):
2601 		if (s->first_displayed_entry == NULL)
2602 			break;
2603 		if (s->selected > 0)
2604 			s->selected--;
2605 		else
2606 			log_scroll_up(s, 1);
2607 		select_commit(s);
2608 		break;
2609 	case 'g':
2610 	case KEY_HOME:
2611 		s->selected = 0;
2612 		s->first_displayed_entry = TAILQ_FIRST(&s->commits.head);
2613 		select_commit(s);
2614 		break;
2615 	case CTRL('u'):
2616 	case 'u':
2617 		nscroll /= 2;
2618 		/* FALL THROUGH */
2619 	case KEY_PPAGE:
2620 	case CTRL('b'):
2621 		if (s->first_displayed_entry == NULL)
2622 			break;
2623 		if (TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
2624 			s->selected = MAX(0, s->selected - nscroll - 1);
2625 		else
2626 			log_scroll_up(s, nscroll);
2627 		select_commit(s);
2628 		break;
2629 	case 'j':
2630 	case KEY_DOWN:
2631 	case '>':
2632 	case '.':
2633 	case CTRL('n'):
2634 		if (s->first_displayed_entry == NULL)
2635 			break;
2636 		if (s->selected < MIN(view->nlines - 2,
2637 		    s->commits.ncommits - 1))
2638 			s->selected++;
2639 		else {
2640 			err = log_scroll_down(view, 1);
2641 			if (err)
2642 				break;
2643 		}
2644 		select_commit(s);
2645 		break;
2646 	case 'G':
2647 	case KEY_END: {
2648 		/* We don't know yet how many commits, so we're forced to
2649 		 * traverse them all. */
2650 		if (!s->thread_args.log_complete) {
2651 			s->thread_args.load_all = 1;
2652 			return trigger_log_thread(view, 0);
2653 		}
2654 
2655 		s->selected = 0;
2656 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2657 		for (n = 0; n < view->nlines - 1; n++) {
2658 			if (entry == NULL)
2659 				break;
2660 			s->first_displayed_entry = entry;
2661 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2662 		}
2663 		if (n > 0)
2664 			s->selected = n - 1;
2665 		select_commit(s);
2666 		break;
2667 	}
2668 	case CTRL('d'):
2669 	case 'd':
2670 		nscroll /= 2;
2671 		/* FALL THROUGH */
2672 	case KEY_NPAGE:
2673 	case CTRL('f'): {
2674 		struct commit_queue_entry *first;
2675 		first = s->first_displayed_entry;
2676 		if (first == NULL)
2677 			break;
2678 		err = log_scroll_down(view, nscroll);
2679 		if (err)
2680 			break;
2681 		if (first == s->first_displayed_entry &&
2682 		    s->selected < MIN(view->nlines - 2,
2683 		    s->commits.ncommits - 1)) {
2684 			/* can't scroll further down */
2685 			s->selected += MIN(s->last_displayed_entry->idx -
2686 			    s->selected_entry->idx, nscroll + 1);
2687 		}
2688 		select_commit(s);
2689 		break;
2690 	}
2691 	case KEY_RESIZE:
2692 		if (s->selected > view->nlines - 2)
2693 			s->selected = view->nlines - 2;
2694 		if (s->selected > s->commits.ncommits - 1)
2695 			s->selected = s->commits.ncommits - 1;
2696 		select_commit(s);
2697 		if (s->commits.ncommits < view->nlines - 1 &&
2698 		    !s->thread_args.log_complete) {
2699 			s->thread_args.commits_needed += (view->nlines - 1) -
2700 			    s->commits.ncommits;
2701 			err = trigger_log_thread(view, 1);
2702 		}
2703 		break;
2704 	case KEY_ENTER:
2705 	case ' ':
2706 	case '\r':
2707 		if (s->selected_entry == NULL)
2708 			break;
2709 		if (view_is_parent_view(view))
2710 			begin_x = view_split_begin_x(view->begin_x);
2711 		err = open_diff_view_for_commit(&diff_view, begin_x,
2712 		    s->selected_entry->commit, s->selected_entry->id,
2713 		    view, s->repo);
2714 		if (err)
2715 			break;
2716 		view->focussed = 0;
2717 		diff_view->focussed = 1;
2718 		if (view_is_parent_view(view)) {
2719 			err = view_close_child(view);
2720 			if (err)
2721 				return err;
2722 			err = view_set_child(view, diff_view);
2723 			if (err)
2724 				return err;
2725 			view->focus_child = 1;
2726 		} else
2727 			*new_view = diff_view;
2728 		break;
2729 	case 't':
2730 		if (s->selected_entry == NULL)
2731 			break;
2732 		if (view_is_parent_view(view))
2733 			begin_x = view_split_begin_x(view->begin_x);
2734 		err = browse_commit_tree(&tree_view, begin_x,
2735 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
2736 		    s->repo);
2737 		if (err)
2738 			break;
2739 		view->focussed = 0;
2740 		tree_view->focussed = 1;
2741 		if (view_is_parent_view(view)) {
2742 			err = view_close_child(view);
2743 			if (err)
2744 				return err;
2745 			err = view_set_child(view, tree_view);
2746 			if (err)
2747 				return err;
2748 			view->focus_child = 1;
2749 		} else
2750 			*new_view = tree_view;
2751 		break;
2752 	case KEY_BACKSPACE:
2753 	case CTRL('l'):
2754 	case 'B':
2755 		if (ch == KEY_BACKSPACE &&
2756 		    got_path_is_root_dir(s->in_repo_path))
2757 			break;
2758 		err = stop_log_thread(s);
2759 		if (err)
2760 			return err;
2761 		if (ch == KEY_BACKSPACE) {
2762 			char *parent_path;
2763 			err = got_path_dirname(&parent_path, s->in_repo_path);
2764 			if (err)
2765 				return err;
2766 			free(s->in_repo_path);
2767 			s->in_repo_path = parent_path;
2768 			s->thread_args.in_repo_path = s->in_repo_path;
2769 		} else if (ch == CTRL('l')) {
2770 			struct got_object_id *start_id;
2771 			err = got_repo_match_object_id(&start_id, NULL,
2772 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2773 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
2774 			if (err)
2775 				return err;
2776 			free(s->start_id);
2777 			s->start_id = start_id;
2778 			s->thread_args.start_id = s->start_id;
2779 		} else /* 'B' */
2780 			s->log_branches = !s->log_branches;
2781 
2782 		if (s->thread_args.pack_fds == NULL) {
2783 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
2784 			if (err)
2785 				return err;
2786 		}
2787 		err = got_repo_open(&s->thread_args.repo,
2788 		    got_repo_get_path(s->repo), NULL,
2789 		    s->thread_args.pack_fds);
2790 		if (err)
2791 			return err;
2792 		tog_free_refs();
2793 		err = tog_load_refs(s->repo, 0);
2794 		if (err)
2795 			return err;
2796 		err = got_commit_graph_open(&s->thread_args.graph,
2797 		    s->in_repo_path, !s->log_branches);
2798 		if (err)
2799 			return err;
2800 		err = got_commit_graph_iter_start(s->thread_args.graph,
2801 		    s->start_id, s->repo, NULL, NULL);
2802 		if (err)
2803 			return err;
2804 		free_commits(&s->commits);
2805 		s->first_displayed_entry = NULL;
2806 		s->last_displayed_entry = NULL;
2807 		s->selected_entry = NULL;
2808 		s->selected = 0;
2809 		s->thread_args.log_complete = 0;
2810 		s->quit = 0;
2811 		s->thread_args.commits_needed = view->nlines;
2812 		s->matched_entry = NULL;
2813 		s->search_entry = NULL;
2814 		break;
2815 	case 'r':
2816 		if (view_is_parent_view(view))
2817 			begin_x = view_split_begin_x(view->begin_x);
2818 		ref_view = view_open(view->nlines, view->ncols,
2819 		    view->begin_y, begin_x, TOG_VIEW_REF);
2820 		if (ref_view == NULL)
2821 			return got_error_from_errno("view_open");
2822 		err = open_ref_view(ref_view, s->repo);
2823 		if (err) {
2824 			view_close(ref_view);
2825 			return err;
2826 		}
2827 		view->focussed = 0;
2828 		ref_view->focussed = 1;
2829 		if (view_is_parent_view(view)) {
2830 			err = view_close_child(view);
2831 			if (err)
2832 				return err;
2833 			err = view_set_child(view, ref_view);
2834 			if (err)
2835 				return err;
2836 			view->focus_child = 1;
2837 		} else
2838 			*new_view = ref_view;
2839 		break;
2840 	default:
2841 		break;
2842 	}
2843 
2844 	return err;
2845 }
2846 
2847 static const struct got_error *
2848 apply_unveil(const char *repo_path, const char *worktree_path)
2849 {
2850 	const struct got_error *error;
2851 
2852 #ifdef PROFILE
2853 	if (unveil("gmon.out", "rwc") != 0)
2854 		return got_error_from_errno2("unveil", "gmon.out");
2855 #endif
2856 	if (repo_path && unveil(repo_path, "r") != 0)
2857 		return got_error_from_errno2("unveil", repo_path);
2858 
2859 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2860 		return got_error_from_errno2("unveil", worktree_path);
2861 
2862 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2863 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2864 
2865 	error = got_privsep_unveil_exec_helpers();
2866 	if (error != NULL)
2867 		return error;
2868 
2869 	if (unveil(NULL, NULL) != 0)
2870 		return got_error_from_errno("unveil");
2871 
2872 	return NULL;
2873 }
2874 
2875 static void
2876 init_curses(void)
2877 {
2878 	/*
2879 	 * Override default signal handlers before starting ncurses.
2880 	 * This should prevent ncurses from installing its own
2881 	 * broken cleanup() signal handler.
2882 	 */
2883 	signal(SIGWINCH, tog_sigwinch);
2884 	signal(SIGPIPE, tog_sigpipe);
2885 	signal(SIGCONT, tog_sigcont);
2886 	signal(SIGINT, tog_sigint);
2887 	signal(SIGTERM, tog_sigterm);
2888 
2889 	initscr();
2890 	cbreak();
2891 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2892 	noecho();
2893 	nonl();
2894 	intrflush(stdscr, FALSE);
2895 	keypad(stdscr, TRUE);
2896 	curs_set(0);
2897 	if (getenv("TOG_COLORS") != NULL) {
2898 		start_color();
2899 		use_default_colors();
2900 	}
2901 }
2902 
2903 static const struct got_error *
2904 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2905     struct got_repository *repo, struct got_worktree *worktree)
2906 {
2907 	const struct got_error *err = NULL;
2908 
2909 	if (argc == 0) {
2910 		*in_repo_path = strdup("/");
2911 		if (*in_repo_path == NULL)
2912 			return got_error_from_errno("strdup");
2913 		return NULL;
2914 	}
2915 
2916 	if (worktree) {
2917 		const char *prefix = got_worktree_get_path_prefix(worktree);
2918 		char *p;
2919 
2920 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2921 		if (err)
2922 			return err;
2923 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2924 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2925 		    p) == -1) {
2926 			err = got_error_from_errno("asprintf");
2927 			*in_repo_path = NULL;
2928 		}
2929 		free(p);
2930 	} else
2931 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2932 
2933 	return err;
2934 }
2935 
2936 static const struct got_error *
2937 cmd_log(int argc, char *argv[])
2938 {
2939 	const struct got_error *error;
2940 	struct got_repository *repo = NULL;
2941 	struct got_worktree *worktree = NULL;
2942 	struct got_object_id *start_id = NULL;
2943 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2944 	char *start_commit = NULL, *label = NULL;
2945 	struct got_reference *ref = NULL;
2946 	const char *head_ref_name = NULL;
2947 	int ch, log_branches = 0;
2948 	struct tog_view *view;
2949 	int *pack_fds = NULL;
2950 
2951 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2952 		switch (ch) {
2953 		case 'b':
2954 			log_branches = 1;
2955 			break;
2956 		case 'c':
2957 			start_commit = optarg;
2958 			break;
2959 		case 'r':
2960 			repo_path = realpath(optarg, NULL);
2961 			if (repo_path == NULL)
2962 				return got_error_from_errno2("realpath",
2963 				    optarg);
2964 			break;
2965 		default:
2966 			usage_log();
2967 			/* NOTREACHED */
2968 		}
2969 	}
2970 
2971 	argc -= optind;
2972 	argv += optind;
2973 
2974 	if (argc > 1)
2975 		usage_log();
2976 
2977 	error = got_repo_pack_fds_open(&pack_fds);
2978 	if (error != NULL)
2979 		goto done;
2980 
2981 	if (repo_path == NULL) {
2982 		cwd = getcwd(NULL, 0);
2983 		if (cwd == NULL)
2984 			return got_error_from_errno("getcwd");
2985 		error = got_worktree_open(&worktree, cwd);
2986 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2987 			goto done;
2988 		if (worktree)
2989 			repo_path =
2990 			    strdup(got_worktree_get_repo_path(worktree));
2991 		else
2992 			repo_path = strdup(cwd);
2993 		if (repo_path == NULL) {
2994 			error = got_error_from_errno("strdup");
2995 			goto done;
2996 		}
2997 	}
2998 
2999 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3000 	if (error != NULL)
3001 		goto done;
3002 
3003 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3004 	    repo, worktree);
3005 	if (error)
3006 		goto done;
3007 
3008 	init_curses();
3009 
3010 	error = apply_unveil(got_repo_get_path(repo),
3011 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3012 	if (error)
3013 		goto done;
3014 
3015 	/* already loaded by tog_log_with_path()? */
3016 	if (TAILQ_EMPTY(&tog_refs)) {
3017 		error = tog_load_refs(repo, 0);
3018 		if (error)
3019 			goto done;
3020 	}
3021 
3022 	if (start_commit == NULL) {
3023 		error = got_repo_match_object_id(&start_id, &label,
3024 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3025 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3026 		if (error)
3027 			goto done;
3028 		head_ref_name = label;
3029 	} else {
3030 		error = got_ref_open(&ref, repo, start_commit, 0);
3031 		if (error == NULL)
3032 			head_ref_name = got_ref_get_name(ref);
3033 		else if (error->code != GOT_ERR_NOT_REF)
3034 			goto done;
3035 		error = got_repo_match_object_id(&start_id, NULL,
3036 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3037 		if (error)
3038 			goto done;
3039 	}
3040 
3041 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3042 	if (view == NULL) {
3043 		error = got_error_from_errno("view_open");
3044 		goto done;
3045 	}
3046 	error = open_log_view(view, start_id, repo, head_ref_name,
3047 	    in_repo_path, log_branches);
3048 	if (error)
3049 		goto done;
3050 	if (worktree) {
3051 		/* Release work tree lock. */
3052 		got_worktree_close(worktree);
3053 		worktree = NULL;
3054 	}
3055 	error = view_loop(view);
3056 done:
3057 	free(in_repo_path);
3058 	free(repo_path);
3059 	free(cwd);
3060 	free(start_id);
3061 	free(label);
3062 	if (ref)
3063 		got_ref_close(ref);
3064 	if (repo) {
3065 		const struct got_error *close_err = got_repo_close(repo);
3066 		if (error == NULL)
3067 			error = close_err;
3068 	}
3069 	if (worktree)
3070 		got_worktree_close(worktree);
3071 	if (pack_fds) {
3072 		const struct got_error *pack_err =
3073 		    got_repo_pack_fds_close(pack_fds);
3074 		if (error == NULL)
3075 			error = pack_err;
3076 	}
3077 	tog_free_refs();
3078 	return error;
3079 }
3080 
3081 __dead static void
3082 usage_diff(void)
3083 {
3084 	endwin();
3085 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3086 	    "[-w] object1 object2\n", getprogname());
3087 	exit(1);
3088 }
3089 
3090 static int
3091 match_line(const char *line, regex_t *regex, size_t nmatch,
3092     regmatch_t *regmatch)
3093 {
3094 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3095 }
3096 
3097 struct tog_color *
3098 match_color(struct tog_colors *colors, const char *line)
3099 {
3100 	struct tog_color *tc = NULL;
3101 
3102 	STAILQ_FOREACH(tc, colors, entry) {
3103 		if (match_line(line, &tc->regex, 0, NULL))
3104 			return tc;
3105 	}
3106 
3107 	return NULL;
3108 }
3109 
3110 static const struct got_error *
3111 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3112     WINDOW *window, int skipcol, regmatch_t *regmatch)
3113 {
3114 	const struct got_error *err = NULL;
3115 	char *exstr = NULL;
3116 	wchar_t *wline = NULL;
3117 	int rme, rms, n, width, scrollx;
3118 	int width0 = 0, width1 = 0, width2 = 0;
3119 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3120 
3121 	*wtotal = 0;
3122 
3123 	rms = regmatch->rm_so;
3124 	rme = regmatch->rm_eo;
3125 
3126 	err = expand_tab(&exstr, line);
3127 	if (err)
3128 		return err;
3129 
3130 	/* Split the line into 3 segments, according to match offsets. */
3131 	seg0 = strndup(exstr, rms);
3132 	if (seg0 == NULL) {
3133 		err = got_error_from_errno("strndup");
3134 		goto done;
3135 	}
3136 	seg1 = strndup(exstr + rms, rme - rms);
3137 	if (seg1 == NULL) {
3138 		err = got_error_from_errno("strndup");
3139 		goto done;
3140 	}
3141 	seg2 = strdup(exstr + rme);
3142 	if (seg2 == NULL) {
3143 		err = got_error_from_errno("strndup");
3144 		goto done;
3145 	}
3146 
3147 	/* draw up to matched token if we haven't scrolled past it */
3148 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3149 	    col_tab_align, 1);
3150 	if (err)
3151 		goto done;
3152 	n = MAX(width0 - skipcol, 0);
3153 	if (n) {
3154 		free(wline);
3155 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3156 		    wlimit, col_tab_align, 1);
3157 		if (err)
3158 			goto done;
3159 		waddwstr(window, &wline[scrollx]);
3160 		wlimit -= width;
3161 		*wtotal += width;
3162 	}
3163 
3164 	if (wlimit > 0) {
3165 		int i = 0, w = 0;
3166 		size_t wlen;
3167 
3168 		free(wline);
3169 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3170 		    col_tab_align, 1);
3171 		if (err)
3172 			goto done;
3173 		wlen = wcslen(wline);
3174 		while (i < wlen) {
3175 			width = wcwidth(wline[i]);
3176 			if (width == -1) {
3177 				/* should not happen, tabs are expanded */
3178 				err = got_error(GOT_ERR_RANGE);
3179 				goto done;
3180 			}
3181 			if (width0 + w + width > skipcol)
3182 				break;
3183 			w += width; 
3184 			i++;
3185 		}
3186 		/* draw (visible part of) matched token (if scrolled into it) */
3187 		if (width1 - w > 0) {
3188 			wattron(window, A_STANDOUT);
3189 			waddwstr(window, &wline[i]);
3190 			wattroff(window, A_STANDOUT);
3191 			wlimit -= (width1 - w);
3192 			*wtotal += (width1 - w);
3193 		}
3194 	}
3195 
3196 	if (wlimit > 0) {  /* draw rest of line */
3197 		free(wline);
3198 		if (skipcol > width0 + width1) {
3199 			err = format_line(&wline, &width2, &scrollx, seg2,
3200 			    skipcol - (width0 + width1), wlimit,
3201 			    col_tab_align, 1);
3202 			if (err)
3203 				goto done;
3204 			waddwstr(window, &wline[scrollx]);
3205 		} else {
3206 			err = format_line(&wline, &width2, NULL, seg2, 0,
3207 			    wlimit, col_tab_align, 1);
3208 			if (err)
3209 				goto done;
3210 			waddwstr(window, wline);
3211 		}
3212 		*wtotal += width2;
3213 	}
3214 done:
3215 	free(wline);
3216 	free(exstr);
3217 	free(seg0);
3218 	free(seg1);
3219 	free(seg2);
3220 	return err;
3221 }
3222 
3223 static const struct got_error *
3224 draw_file(struct tog_view *view, const char *header)
3225 {
3226 	struct tog_diff_view_state *s = &view->state.diff;
3227 	regmatch_t *regmatch = &view->regmatch;
3228 	const struct got_error *err;
3229 	int nprinted = 0;
3230 	char *line;
3231 	size_t linesize = 0;
3232 	ssize_t linelen;
3233 	struct tog_color *tc;
3234 	wchar_t *wline;
3235 	int width;
3236 	int max_lines = view->nlines;
3237 	int nlines = s->nlines;
3238 	off_t line_offset;
3239 
3240 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3241 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3242 		return got_error_from_errno("fseek");
3243 
3244 	werase(view->window);
3245 
3246 	if (header) {
3247 		if (asprintf(&line, "[%d/%d] %s",
3248 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3249 		    header) == -1)
3250 			return got_error_from_errno("asprintf");
3251 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3252 		    0, 0);
3253 		free(line);
3254 		if (err)
3255 			return err;
3256 
3257 		if (view_needs_focus_indication(view))
3258 			wstandout(view->window);
3259 		waddwstr(view->window, wline);
3260 		free(wline);
3261 		wline = NULL;
3262 		if (view_needs_focus_indication(view))
3263 			wstandend(view->window);
3264 		if (width <= view->ncols - 1)
3265 			waddch(view->window, '\n');
3266 
3267 		if (max_lines <= 1)
3268 			return NULL;
3269 		max_lines--;
3270 	}
3271 
3272 	s->eof = 0;
3273 	view->maxx = 0;
3274 	line = NULL;
3275 	while (max_lines > 0 && nprinted < max_lines) {
3276 		linelen = getline(&line, &linesize, s->f);
3277 		if (linelen == -1) {
3278 			if (feof(s->f)) {
3279 				s->eof = 1;
3280 				break;
3281 			}
3282 			free(line);
3283 			return got_ferror(s->f, GOT_ERR_IO);
3284 		}
3285 
3286 		/* Set view->maxx based on full line length. */
3287 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3288 		    view->x ? 1 : 0);
3289 		if (err) {
3290 			free(line);
3291 			return err;
3292 		}
3293 		view->maxx = MAX(view->maxx, width);
3294 		free(wline);
3295 		wline = NULL;
3296 
3297 		tc = match_color(&s->colors, line);
3298 		if (tc)
3299 			wattr_on(view->window,
3300 			    COLOR_PAIR(tc->colorpair), NULL);
3301 		if (s->first_displayed_line + nprinted == s->matched_line &&
3302 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3303 			err = add_matched_line(&width, line, view->ncols, 0,
3304 			    view->window, view->x, regmatch);
3305 			if (err) {
3306 				free(line);
3307 				return err;
3308 			}
3309 		} else {
3310 			int skip;
3311 			err = format_line(&wline, &width, &skip, line,
3312 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3313 			if (err) {
3314 				free(line);
3315 				return err;
3316 			}
3317 			waddwstr(view->window, &wline[skip]);
3318 			free(wline);
3319 			wline = NULL;
3320 		}
3321 		if (tc)
3322 			wattr_off(view->window,
3323 			    COLOR_PAIR(tc->colorpair), NULL);
3324 		if (width <= view->ncols - 1)
3325 			waddch(view->window, '\n');
3326 		nprinted++;
3327 	}
3328 	free(line);
3329 	if (nprinted >= 1)
3330 		s->last_displayed_line = s->first_displayed_line +
3331 		    (nprinted - 1);
3332 	else
3333 		s->last_displayed_line = s->first_displayed_line;
3334 
3335 	view_vborder(view);
3336 
3337 	if (s->eof) {
3338 		while (nprinted < view->nlines) {
3339 			waddch(view->window, '\n');
3340 			nprinted++;
3341 		}
3342 
3343 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3344 		    view->ncols, 0, 0);
3345 		if (err) {
3346 			return err;
3347 		}
3348 
3349 		wstandout(view->window);
3350 		waddwstr(view->window, wline);
3351 		free(wline);
3352 		wline = NULL;
3353 		wstandend(view->window);
3354 	}
3355 
3356 	return NULL;
3357 }
3358 
3359 static char *
3360 get_datestr(time_t *time, char *datebuf)
3361 {
3362 	struct tm mytm, *tm;
3363 	char *p, *s;
3364 
3365 	tm = gmtime_r(time, &mytm);
3366 	if (tm == NULL)
3367 		return NULL;
3368 	s = asctime_r(tm, datebuf);
3369 	if (s == NULL)
3370 		return NULL;
3371 	p = strchr(s, '\n');
3372 	if (p)
3373 		*p = '\0';
3374 	return s;
3375 }
3376 
3377 static const struct got_error *
3378 get_changed_paths(struct got_pathlist_head *paths,
3379     struct got_commit_object *commit, struct got_repository *repo)
3380 {
3381 	const struct got_error *err = NULL;
3382 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3383 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3384 	struct got_object_qid *qid;
3385 
3386 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3387 	if (qid != NULL) {
3388 		struct got_commit_object *pcommit;
3389 		err = got_object_open_as_commit(&pcommit, repo,
3390 		    &qid->id);
3391 		if (err)
3392 			return err;
3393 
3394 		tree_id1 = got_object_id_dup(
3395 		    got_object_commit_get_tree_id(pcommit));
3396 		if (tree_id1 == NULL) {
3397 			got_object_commit_close(pcommit);
3398 			return got_error_from_errno("got_object_id_dup");
3399 		}
3400 		got_object_commit_close(pcommit);
3401 
3402 	}
3403 
3404 	if (tree_id1) {
3405 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3406 		if (err)
3407 			goto done;
3408 	}
3409 
3410 	tree_id2 = got_object_commit_get_tree_id(commit);
3411 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3412 	if (err)
3413 		goto done;
3414 
3415 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3416 	    got_diff_tree_collect_changed_paths, paths, 0);
3417 done:
3418 	if (tree1)
3419 		got_object_tree_close(tree1);
3420 	if (tree2)
3421 		got_object_tree_close(tree2);
3422 	free(tree_id1);
3423 	return err;
3424 }
3425 
3426 static const struct got_error *
3427 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3428 {
3429 	off_t *p;
3430 
3431 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3432 	if (p == NULL)
3433 		return got_error_from_errno("reallocarray");
3434 	*line_offsets = p;
3435 	(*line_offsets)[*nlines] = off;
3436 	(*nlines)++;
3437 	return NULL;
3438 }
3439 
3440 static const struct got_error *
3441 write_commit_info(off_t **line_offsets, size_t *nlines,
3442     struct got_object_id *commit_id, struct got_reflist_head *refs,
3443     struct got_repository *repo, FILE *outfile)
3444 {
3445 	const struct got_error *err = NULL;
3446 	char datebuf[26], *datestr;
3447 	struct got_commit_object *commit;
3448 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3449 	time_t committer_time;
3450 	const char *author, *committer;
3451 	char *refs_str = NULL;
3452 	struct got_pathlist_head changed_paths;
3453 	struct got_pathlist_entry *pe;
3454 	off_t outoff = 0;
3455 	int n;
3456 
3457 	TAILQ_INIT(&changed_paths);
3458 
3459 	if (refs) {
3460 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3461 		if (err)
3462 			return err;
3463 	}
3464 
3465 	err = got_object_open_as_commit(&commit, repo, commit_id);
3466 	if (err)
3467 		return err;
3468 
3469 	err = got_object_id_str(&id_str, commit_id);
3470 	if (err) {
3471 		err = got_error_from_errno("got_object_id_str");
3472 		goto done;
3473 	}
3474 
3475 	err = add_line_offset(line_offsets, nlines, 0);
3476 	if (err)
3477 		goto done;
3478 
3479 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3480 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3481 	if (n < 0) {
3482 		err = got_error_from_errno("fprintf");
3483 		goto done;
3484 	}
3485 	outoff += n;
3486 	err = add_line_offset(line_offsets, nlines, outoff);
3487 	if (err)
3488 		goto done;
3489 
3490 	n = fprintf(outfile, "from: %s\n",
3491 	    got_object_commit_get_author(commit));
3492 	if (n < 0) {
3493 		err = got_error_from_errno("fprintf");
3494 		goto done;
3495 	}
3496 	outoff += n;
3497 	err = add_line_offset(line_offsets, nlines, outoff);
3498 	if (err)
3499 		goto done;
3500 
3501 	committer_time = got_object_commit_get_committer_time(commit);
3502 	datestr = get_datestr(&committer_time, datebuf);
3503 	if (datestr) {
3504 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3505 		if (n < 0) {
3506 			err = got_error_from_errno("fprintf");
3507 			goto done;
3508 		}
3509 		outoff += n;
3510 		err = add_line_offset(line_offsets, nlines, outoff);
3511 		if (err)
3512 			goto done;
3513 	}
3514 	author = got_object_commit_get_author(commit);
3515 	committer = got_object_commit_get_committer(commit);
3516 	if (strcmp(author, committer) != 0) {
3517 		n = fprintf(outfile, "via: %s\n", committer);
3518 		if (n < 0) {
3519 			err = got_error_from_errno("fprintf");
3520 			goto done;
3521 		}
3522 		outoff += n;
3523 		err = add_line_offset(line_offsets, nlines, outoff);
3524 		if (err)
3525 			goto done;
3526 	}
3527 	if (got_object_commit_get_nparents(commit) > 1) {
3528 		const struct got_object_id_queue *parent_ids;
3529 		struct got_object_qid *qid;
3530 		int pn = 1;
3531 		parent_ids = got_object_commit_get_parent_ids(commit);
3532 		STAILQ_FOREACH(qid, parent_ids, entry) {
3533 			err = got_object_id_str(&id_str, &qid->id);
3534 			if (err)
3535 				goto done;
3536 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3537 			if (n < 0) {
3538 				err = got_error_from_errno("fprintf");
3539 				goto done;
3540 			}
3541 			outoff += n;
3542 			err = add_line_offset(line_offsets, nlines, outoff);
3543 			if (err)
3544 				goto done;
3545 			free(id_str);
3546 			id_str = NULL;
3547 		}
3548 	}
3549 
3550 	err = got_object_commit_get_logmsg(&logmsg, commit);
3551 	if (err)
3552 		goto done;
3553 	s = logmsg;
3554 	while ((line = strsep(&s, "\n")) != NULL) {
3555 		n = fprintf(outfile, "%s\n", line);
3556 		if (n < 0) {
3557 			err = got_error_from_errno("fprintf");
3558 			goto done;
3559 		}
3560 		outoff += n;
3561 		err = add_line_offset(line_offsets, nlines, outoff);
3562 		if (err)
3563 			goto done;
3564 	}
3565 
3566 	err = get_changed_paths(&changed_paths, commit, repo);
3567 	if (err)
3568 		goto done;
3569 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3570 		struct got_diff_changed_path *cp = pe->data;
3571 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3572 		if (n < 0) {
3573 			err = got_error_from_errno("fprintf");
3574 			goto done;
3575 		}
3576 		outoff += n;
3577 		err = add_line_offset(line_offsets, nlines, outoff);
3578 		if (err)
3579 			goto done;
3580 		free((char *)pe->path);
3581 		free(pe->data);
3582 	}
3583 
3584 	fputc('\n', outfile);
3585 	outoff++;
3586 	err = add_line_offset(line_offsets, nlines, outoff);
3587 done:
3588 	got_pathlist_free(&changed_paths);
3589 	free(id_str);
3590 	free(logmsg);
3591 	free(refs_str);
3592 	got_object_commit_close(commit);
3593 	if (err) {
3594 		free(*line_offsets);
3595 		*line_offsets = NULL;
3596 		*nlines = 0;
3597 	}
3598 	return err;
3599 }
3600 
3601 static const struct got_error *
3602 create_diff(struct tog_diff_view_state *s)
3603 {
3604 	const struct got_error *err = NULL;
3605 	FILE *f = NULL;
3606 	int obj_type;
3607 
3608 	free(s->line_offsets);
3609 	s->line_offsets = malloc(sizeof(off_t));
3610 	if (s->line_offsets == NULL)
3611 		return got_error_from_errno("malloc");
3612 	s->nlines = 0;
3613 
3614 	f = got_opentemp();
3615 	if (f == NULL) {
3616 		err = got_error_from_errno("got_opentemp");
3617 		goto done;
3618 	}
3619 	if (s->f && fclose(s->f) == EOF) {
3620 		err = got_error_from_errno("fclose");
3621 		goto done;
3622 	}
3623 	s->f = f;
3624 
3625 	if (s->id1)
3626 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3627 	else
3628 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3629 	if (err)
3630 		goto done;
3631 
3632 	switch (obj_type) {
3633 	case GOT_OBJ_TYPE_BLOB:
3634 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3635 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3636 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3637 		    s->repo, s->f);
3638 		break;
3639 	case GOT_OBJ_TYPE_TREE:
3640 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3641 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3642 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3643 		break;
3644 	case GOT_OBJ_TYPE_COMMIT: {
3645 		const struct got_object_id_queue *parent_ids;
3646 		struct got_object_qid *pid;
3647 		struct got_commit_object *commit2;
3648 		struct got_reflist_head *refs;
3649 
3650 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3651 		if (err)
3652 			goto done;
3653 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3654 		/* Show commit info if we're diffing to a parent/root commit. */
3655 		if (s->id1 == NULL) {
3656 			err = write_commit_info(&s->line_offsets, &s->nlines,
3657 			    s->id2, refs, s->repo, s->f);
3658 			if (err)
3659 				goto done;
3660 		} else {
3661 			parent_ids = got_object_commit_get_parent_ids(commit2);
3662 			STAILQ_FOREACH(pid, parent_ids, entry) {
3663 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3664 					err = write_commit_info(
3665 					    &s->line_offsets, &s->nlines,
3666 					    s->id2, refs, s->repo, s->f);
3667 					if (err)
3668 						goto done;
3669 					break;
3670 				}
3671 			}
3672 		}
3673 		got_object_commit_close(commit2);
3674 
3675 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3676 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3677 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3678 		break;
3679 	}
3680 	default:
3681 		err = got_error(GOT_ERR_OBJ_TYPE);
3682 		break;
3683 	}
3684 	if (err)
3685 		goto done;
3686 done:
3687 	if (s->f && fflush(s->f) != 0 && err == NULL)
3688 		err = got_error_from_errno("fflush");
3689 	return err;
3690 }
3691 
3692 static void
3693 diff_view_indicate_progress(struct tog_view *view)
3694 {
3695 	mvwaddstr(view->window, 0, 0, "diffing...");
3696 	update_panels();
3697 	doupdate();
3698 }
3699 
3700 static const struct got_error *
3701 search_start_diff_view(struct tog_view *view)
3702 {
3703 	struct tog_diff_view_state *s = &view->state.diff;
3704 
3705 	s->matched_line = 0;
3706 	return NULL;
3707 }
3708 
3709 static const struct got_error *
3710 search_next_diff_view(struct tog_view *view)
3711 {
3712 	struct tog_diff_view_state *s = &view->state.diff;
3713 	const struct got_error *err = NULL;
3714 	int lineno;
3715 	char *line = NULL;
3716 	size_t linesize = 0;
3717 	ssize_t linelen;
3718 
3719 	if (!view->searching) {
3720 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3721 		return NULL;
3722 	}
3723 
3724 	if (s->matched_line) {
3725 		if (view->searching == TOG_SEARCH_FORWARD)
3726 			lineno = s->matched_line + 1;
3727 		else
3728 			lineno = s->matched_line - 1;
3729 	} else
3730 		lineno = s->first_displayed_line;
3731 
3732 	while (1) {
3733 		off_t offset;
3734 
3735 		if (lineno <= 0 || lineno > s->nlines) {
3736 			if (s->matched_line == 0) {
3737 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3738 				break;
3739 			}
3740 
3741 			if (view->searching == TOG_SEARCH_FORWARD)
3742 				lineno = 1;
3743 			else
3744 				lineno = s->nlines;
3745 		}
3746 
3747 		offset = s->line_offsets[lineno - 1];
3748 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3749 			free(line);
3750 			return got_error_from_errno("fseeko");
3751 		}
3752 		linelen = getline(&line, &linesize, s->f);
3753 		if (linelen != -1) {
3754 			char *exstr;
3755 			err = expand_tab(&exstr, line);
3756 			if (err)
3757 				break;
3758 			if (match_line(exstr, &view->regex, 1,
3759 			    &view->regmatch)) {
3760 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3761 				s->matched_line = lineno;
3762 				free(exstr);
3763 				break;
3764 			}
3765 			free(exstr);
3766 		}
3767 		if (view->searching == TOG_SEARCH_FORWARD)
3768 			lineno++;
3769 		else
3770 			lineno--;
3771 	}
3772 	free(line);
3773 
3774 	if (s->matched_line) {
3775 		s->first_displayed_line = s->matched_line;
3776 		s->selected_line = 1;
3777 	}
3778 
3779 	return err;
3780 }
3781 
3782 static const struct got_error *
3783 close_diff_view(struct tog_view *view)
3784 {
3785 	const struct got_error *err = NULL;
3786 	struct tog_diff_view_state *s = &view->state.diff;
3787 
3788 	free(s->id1);
3789 	s->id1 = NULL;
3790 	free(s->id2);
3791 	s->id2 = NULL;
3792 	if (s->f && fclose(s->f) == EOF)
3793 		err = got_error_from_errno("fclose");
3794 	s->f = NULL;
3795 	if (s->f1 && fclose(s->f1) == EOF)
3796 		err = got_error_from_errno("fclose");
3797 	s->f1 = NULL;
3798 	if (s->f2 && fclose(s->f2) == EOF)
3799 		err = got_error_from_errno("fclose");
3800 	s->f2 = NULL;
3801 	free_colors(&s->colors);
3802 	free(s->line_offsets);
3803 	s->line_offsets = NULL;
3804 	s->nlines = 0;
3805 	return err;
3806 }
3807 
3808 static const struct got_error *
3809 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3810     struct got_object_id *id2, const char *label1, const char *label2,
3811     int diff_context, int ignore_whitespace, int force_text_diff,
3812     struct tog_view *log_view, struct got_repository *repo)
3813 {
3814 	const struct got_error *err;
3815 	struct tog_diff_view_state *s = &view->state.diff;
3816 
3817 	memset(s, 0, sizeof(*s));
3818 
3819 	if (id1 != NULL && id2 != NULL) {
3820 	    int type1, type2;
3821 	    err = got_object_get_type(&type1, repo, id1);
3822 	    if (err)
3823 		return err;
3824 	    err = got_object_get_type(&type2, repo, id2);
3825 	    if (err)
3826 		return err;
3827 
3828 	    if (type1 != type2)
3829 		return got_error(GOT_ERR_OBJ_TYPE);
3830 	}
3831 	s->first_displayed_line = 1;
3832 	s->last_displayed_line = view->nlines;
3833 	s->selected_line = 1;
3834 	s->repo = repo;
3835 	s->id1 = id1;
3836 	s->id2 = id2;
3837 	s->label1 = label1;
3838 	s->label2 = label2;
3839 
3840 	if (id1) {
3841 		s->id1 = got_object_id_dup(id1);
3842 		if (s->id1 == NULL)
3843 			return got_error_from_errno("got_object_id_dup");
3844 	} else
3845 		s->id1 = NULL;
3846 
3847 	s->id2 = got_object_id_dup(id2);
3848 	if (s->id2 == NULL) {
3849 		err = got_error_from_errno("got_object_id_dup");
3850 		goto done;
3851 	}
3852 
3853 	s->f1 = got_opentemp();
3854 	if (s->f1 == NULL) {
3855 		err = got_error_from_errno("got_opentemp");
3856 		goto done;
3857 	}
3858 
3859 	s->f2 = got_opentemp();
3860 	if (s->f2 == NULL) {
3861 		err = got_error_from_errno("got_opentemp");
3862 		goto done;
3863 	}
3864 
3865 	s->first_displayed_line = 1;
3866 	s->last_displayed_line = view->nlines;
3867 	s->diff_context = diff_context;
3868 	s->ignore_whitespace = ignore_whitespace;
3869 	s->force_text_diff = force_text_diff;
3870 	s->log_view = log_view;
3871 	s->repo = repo;
3872 
3873 	STAILQ_INIT(&s->colors);
3874 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3875 		err = add_color(&s->colors,
3876 		    "^-", TOG_COLOR_DIFF_MINUS,
3877 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3878 		if (err)
3879 			goto done;
3880 		err = add_color(&s->colors, "^\\+",
3881 		    TOG_COLOR_DIFF_PLUS,
3882 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3883 		if (err)
3884 			goto done;
3885 		err = add_color(&s->colors,
3886 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3887 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3888 		if (err)
3889 			goto done;
3890 
3891 		err = add_color(&s->colors,
3892 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3893 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3894 		    get_color_value("TOG_COLOR_DIFF_META"));
3895 		if (err)
3896 			goto done;
3897 
3898 		err = add_color(&s->colors,
3899 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3900 		    get_color_value("TOG_COLOR_AUTHOR"));
3901 		if (err)
3902 			goto done;
3903 
3904 		err = add_color(&s->colors,
3905 		    "^date: ", TOG_COLOR_DATE,
3906 		    get_color_value("TOG_COLOR_DATE"));
3907 		if (err)
3908 			goto done;
3909 	}
3910 
3911 	if (log_view && view_is_splitscreen(view))
3912 		show_log_view(log_view); /* draw vborder */
3913 	diff_view_indicate_progress(view);
3914 
3915 	err = create_diff(s);
3916 
3917 	view->show = show_diff_view;
3918 	view->input = input_diff_view;
3919 	view->close = close_diff_view;
3920 	view->search_start = search_start_diff_view;
3921 	view->search_next = search_next_diff_view;
3922 done:
3923 	if (err)
3924 		close_diff_view(view);
3925 	return err;
3926 }
3927 
3928 static const struct got_error *
3929 show_diff_view(struct tog_view *view)
3930 {
3931 	const struct got_error *err;
3932 	struct tog_diff_view_state *s = &view->state.diff;
3933 	char *id_str1 = NULL, *id_str2, *header;
3934 	const char *label1, *label2;
3935 
3936 	if (s->id1) {
3937 		err = got_object_id_str(&id_str1, s->id1);
3938 		if (err)
3939 			return err;
3940 		label1 = s->label1 ? : id_str1;
3941 	} else
3942 		label1 = "/dev/null";
3943 
3944 	err = got_object_id_str(&id_str2, s->id2);
3945 	if (err)
3946 		return err;
3947 	label2 = s->label2 ? : id_str2;
3948 
3949 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3950 		err = got_error_from_errno("asprintf");
3951 		free(id_str1);
3952 		free(id_str2);
3953 		return err;
3954 	}
3955 	free(id_str1);
3956 	free(id_str2);
3957 
3958 	err = draw_file(view, header);
3959 	free(header);
3960 	return err;
3961 }
3962 
3963 static const struct got_error *
3964 set_selected_commit(struct tog_diff_view_state *s,
3965     struct commit_queue_entry *entry)
3966 {
3967 	const struct got_error *err;
3968 	const struct got_object_id_queue *parent_ids;
3969 	struct got_commit_object *selected_commit;
3970 	struct got_object_qid *pid;
3971 
3972 	free(s->id2);
3973 	s->id2 = got_object_id_dup(entry->id);
3974 	if (s->id2 == NULL)
3975 		return got_error_from_errno("got_object_id_dup");
3976 
3977 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3978 	if (err)
3979 		return err;
3980 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3981 	free(s->id1);
3982 	pid = STAILQ_FIRST(parent_ids);
3983 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3984 	got_object_commit_close(selected_commit);
3985 	return NULL;
3986 }
3987 
3988 static const struct got_error *
3989 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3990 {
3991 	const struct got_error *err = NULL;
3992 	struct tog_diff_view_state *s = &view->state.diff;
3993 	struct tog_log_view_state *ls;
3994 	struct commit_queue_entry *old_selected_entry;
3995 	char *line = NULL;
3996 	size_t linesize = 0;
3997 	ssize_t linelen;
3998 	int i, nscroll = view->nlines - 1;
3999 
4000 	switch (ch) {
4001 	case '0':
4002 		view->x = 0;
4003 		break;
4004 	case '$':
4005 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4006 		break;
4007 	case KEY_RIGHT:
4008 	case 'l':
4009 		if (view->x + view->ncols / 3 < view->maxx)
4010 			view->x += 2;  /* move two columns right */
4011 		break;
4012 	case KEY_LEFT:
4013 	case 'h':
4014 		view->x -= MIN(view->x, 2);  /* move two columns back */
4015 		break;
4016 	case 'a':
4017 	case 'w':
4018 		if (ch == 'a')
4019 			s->force_text_diff = !s->force_text_diff;
4020 		if (ch == 'w')
4021 			s->ignore_whitespace = !s->ignore_whitespace;
4022 		wclear(view->window);
4023 		s->first_displayed_line = 1;
4024 		s->last_displayed_line = view->nlines;
4025 		s->matched_line = 0;
4026 		diff_view_indicate_progress(view);
4027 		err = create_diff(s);
4028 		break;
4029 	case 'g':
4030 	case KEY_HOME:
4031 		s->first_displayed_line = 1;
4032 		break;
4033 	case 'G':
4034 	case KEY_END:
4035 		if (s->eof)
4036 			break;
4037 
4038 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4039 		s->eof = 1;
4040 		break;
4041 	case 'k':
4042 	case KEY_UP:
4043 	case CTRL('p'):
4044 		if (s->first_displayed_line > 1)
4045 			s->first_displayed_line--;
4046 		break;
4047 	case CTRL('u'):
4048 	case 'u':
4049 		nscroll /= 2;
4050 		/* FALL THROUGH */
4051 	case KEY_PPAGE:
4052 	case CTRL('b'):
4053 		if (s->first_displayed_line == 1)
4054 			break;
4055 		i = 0;
4056 		while (i++ < nscroll && s->first_displayed_line > 1)
4057 			s->first_displayed_line--;
4058 		break;
4059 	case 'j':
4060 	case KEY_DOWN:
4061 	case CTRL('n'):
4062 		if (!s->eof)
4063 			s->first_displayed_line++;
4064 		break;
4065 	case CTRL('d'):
4066 	case 'd':
4067 		nscroll /= 2;
4068 		/* FALL THROUGH */
4069 	case KEY_NPAGE:
4070 	case CTRL('f'):
4071 	case ' ':
4072 		if (s->eof)
4073 			break;
4074 		i = 0;
4075 		while (!s->eof && i++ < nscroll) {
4076 			linelen = getline(&line, &linesize, s->f);
4077 			s->first_displayed_line++;
4078 			if (linelen == -1) {
4079 				if (feof(s->f)) {
4080 					s->eof = 1;
4081 				} else
4082 					err = got_ferror(s->f, GOT_ERR_IO);
4083 				break;
4084 			}
4085 		}
4086 		free(line);
4087 		break;
4088 	case '[':
4089 		if (s->diff_context > 0) {
4090 			s->diff_context--;
4091 			s->matched_line = 0;
4092 			diff_view_indicate_progress(view);
4093 			err = create_diff(s);
4094 			if (s->first_displayed_line + view->nlines - 1 >
4095 			    s->nlines) {
4096 				s->first_displayed_line = 1;
4097 				s->last_displayed_line = view->nlines;
4098 			}
4099 		}
4100 		break;
4101 	case ']':
4102 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4103 			s->diff_context++;
4104 			s->matched_line = 0;
4105 			diff_view_indicate_progress(view);
4106 			err = create_diff(s);
4107 		}
4108 		break;
4109 	case '<':
4110 	case ',':
4111 		if (s->log_view == NULL)
4112 			break;
4113 		ls = &s->log_view->state.log;
4114 		old_selected_entry = ls->selected_entry;
4115 
4116 		err = input_log_view(NULL, s->log_view, KEY_UP);
4117 		if (err)
4118 			break;
4119 
4120 		if (old_selected_entry == ls->selected_entry)
4121 			break;
4122 
4123 		err = set_selected_commit(s, ls->selected_entry);
4124 		if (err)
4125 			break;
4126 
4127 		s->first_displayed_line = 1;
4128 		s->last_displayed_line = view->nlines;
4129 		s->matched_line = 0;
4130 		view->x = 0;
4131 
4132 		diff_view_indicate_progress(view);
4133 		err = create_diff(s);
4134 		break;
4135 	case '>':
4136 	case '.':
4137 		if (s->log_view == NULL)
4138 			break;
4139 		ls = &s->log_view->state.log;
4140 		old_selected_entry = ls->selected_entry;
4141 
4142 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4143 		if (err)
4144 			break;
4145 
4146 		if (old_selected_entry == ls->selected_entry)
4147 			break;
4148 
4149 		err = set_selected_commit(s, ls->selected_entry);
4150 		if (err)
4151 			break;
4152 
4153 		s->first_displayed_line = 1;
4154 		s->last_displayed_line = view->nlines;
4155 		s->matched_line = 0;
4156 		view->x = 0;
4157 
4158 		diff_view_indicate_progress(view);
4159 		err = create_diff(s);
4160 		break;
4161 	default:
4162 		break;
4163 	}
4164 
4165 	return err;
4166 }
4167 
4168 static const struct got_error *
4169 cmd_diff(int argc, char *argv[])
4170 {
4171 	const struct got_error *error = NULL;
4172 	struct got_repository *repo = NULL;
4173 	struct got_worktree *worktree = NULL;
4174 	struct got_object_id *id1 = NULL, *id2 = NULL;
4175 	char *repo_path = NULL, *cwd = NULL;
4176 	char *id_str1 = NULL, *id_str2 = NULL;
4177 	char *label1 = NULL, *label2 = NULL;
4178 	int diff_context = 3, ignore_whitespace = 0;
4179 	int ch, force_text_diff = 0;
4180 	const char *errstr;
4181 	struct tog_view *view;
4182 	int *pack_fds = NULL;
4183 
4184 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4185 		switch (ch) {
4186 		case 'a':
4187 			force_text_diff = 1;
4188 			break;
4189 		case 'C':
4190 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4191 			    &errstr);
4192 			if (errstr != NULL)
4193 				errx(1, "number of context lines is %s: %s",
4194 				    errstr, errstr);
4195 			break;
4196 		case 'r':
4197 			repo_path = realpath(optarg, NULL);
4198 			if (repo_path == NULL)
4199 				return got_error_from_errno2("realpath",
4200 				    optarg);
4201 			got_path_strip_trailing_slashes(repo_path);
4202 			break;
4203 		case 'w':
4204 			ignore_whitespace = 1;
4205 			break;
4206 		default:
4207 			usage_diff();
4208 			/* NOTREACHED */
4209 		}
4210 	}
4211 
4212 	argc -= optind;
4213 	argv += optind;
4214 
4215 	if (argc == 0) {
4216 		usage_diff(); /* TODO show local worktree changes */
4217 	} else if (argc == 2) {
4218 		id_str1 = argv[0];
4219 		id_str2 = argv[1];
4220 	} else
4221 		usage_diff();
4222 
4223 	error = got_repo_pack_fds_open(&pack_fds);
4224 	if (error)
4225 		goto done;
4226 
4227 	if (repo_path == NULL) {
4228 		cwd = getcwd(NULL, 0);
4229 		if (cwd == NULL)
4230 			return got_error_from_errno("getcwd");
4231 		error = got_worktree_open(&worktree, cwd);
4232 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4233 			goto done;
4234 		if (worktree)
4235 			repo_path =
4236 			    strdup(got_worktree_get_repo_path(worktree));
4237 		else
4238 			repo_path = strdup(cwd);
4239 		if (repo_path == NULL) {
4240 			error = got_error_from_errno("strdup");
4241 			goto done;
4242 		}
4243 	}
4244 
4245 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4246 	if (error)
4247 		goto done;
4248 
4249 	init_curses();
4250 
4251 	error = apply_unveil(got_repo_get_path(repo), NULL);
4252 	if (error)
4253 		goto done;
4254 
4255 	error = tog_load_refs(repo, 0);
4256 	if (error)
4257 		goto done;
4258 
4259 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4260 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4261 	if (error)
4262 		goto done;
4263 
4264 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4265 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4266 	if (error)
4267 		goto done;
4268 
4269 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4270 	if (view == NULL) {
4271 		error = got_error_from_errno("view_open");
4272 		goto done;
4273 	}
4274 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4275 	    ignore_whitespace, force_text_diff, NULL,  repo);
4276 	if (error)
4277 		goto done;
4278 	error = view_loop(view);
4279 done:
4280 	free(label1);
4281 	free(label2);
4282 	free(repo_path);
4283 	free(cwd);
4284 	if (repo) {
4285 		const struct got_error *close_err = got_repo_close(repo);
4286 		if (error == NULL)
4287 			error = close_err;
4288 	}
4289 	if (worktree)
4290 		got_worktree_close(worktree);
4291 	if (pack_fds) {
4292 		const struct got_error *pack_err =
4293 		    got_repo_pack_fds_close(pack_fds);
4294 		if (error == NULL)
4295 			error = pack_err;
4296 	}
4297 	tog_free_refs();
4298 	return error;
4299 }
4300 
4301 __dead static void
4302 usage_blame(void)
4303 {
4304 	endwin();
4305 	fprintf(stderr,
4306 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4307 	    getprogname());
4308 	exit(1);
4309 }
4310 
4311 struct tog_blame_line {
4312 	int annotated;
4313 	struct got_object_id *id;
4314 };
4315 
4316 static const struct got_error *
4317 draw_blame(struct tog_view *view)
4318 {
4319 	struct tog_blame_view_state *s = &view->state.blame;
4320 	struct tog_blame *blame = &s->blame;
4321 	regmatch_t *regmatch = &view->regmatch;
4322 	const struct got_error *err;
4323 	int lineno = 0, nprinted = 0;
4324 	char *line = NULL;
4325 	size_t linesize = 0;
4326 	ssize_t linelen;
4327 	wchar_t *wline;
4328 	int width;
4329 	struct tog_blame_line *blame_line;
4330 	struct got_object_id *prev_id = NULL;
4331 	char *id_str;
4332 	struct tog_color *tc;
4333 
4334 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4335 	if (err)
4336 		return err;
4337 
4338 	rewind(blame->f);
4339 	werase(view->window);
4340 
4341 	if (asprintf(&line, "commit %s", id_str) == -1) {
4342 		err = got_error_from_errno("asprintf");
4343 		free(id_str);
4344 		return err;
4345 	}
4346 
4347 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4348 	free(line);
4349 	line = NULL;
4350 	if (err)
4351 		return err;
4352 	if (view_needs_focus_indication(view))
4353 		wstandout(view->window);
4354 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4355 	if (tc)
4356 		wattr_on(view->window,
4357 		    COLOR_PAIR(tc->colorpair), NULL);
4358 	waddwstr(view->window, wline);
4359 	if (tc)
4360 		wattr_off(view->window,
4361 		    COLOR_PAIR(tc->colorpair), NULL);
4362 	if (view_needs_focus_indication(view))
4363 		wstandend(view->window);
4364 	free(wline);
4365 	wline = NULL;
4366 	if (width < view->ncols - 1)
4367 		waddch(view->window, '\n');
4368 
4369 	if (asprintf(&line, "[%d/%d] %s%s",
4370 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4371 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4372 		free(id_str);
4373 		return got_error_from_errno("asprintf");
4374 	}
4375 	free(id_str);
4376 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4377 	free(line);
4378 	line = NULL;
4379 	if (err)
4380 		return err;
4381 	waddwstr(view->window, wline);
4382 	free(wline);
4383 	wline = NULL;
4384 	if (width < view->ncols - 1)
4385 		waddch(view->window, '\n');
4386 
4387 	s->eof = 0;
4388 	view->maxx = 0;
4389 	while (nprinted < view->nlines - 2) {
4390 		linelen = getline(&line, &linesize, blame->f);
4391 		if (linelen == -1) {
4392 			if (feof(blame->f)) {
4393 				s->eof = 1;
4394 				break;
4395 			}
4396 			free(line);
4397 			return got_ferror(blame->f, GOT_ERR_IO);
4398 		}
4399 		if (++lineno < s->first_displayed_line)
4400 			continue;
4401 
4402 		/* Set view->maxx based on full line length. */
4403 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4404 		if (err) {
4405 			free(line);
4406 			return err;
4407 		}
4408 		free(wline);
4409 		wline = NULL;
4410 		view->maxx = MAX(view->maxx, width);
4411 
4412 		if (view->focussed && nprinted == s->selected_line - 1)
4413 			wstandout(view->window);
4414 
4415 		if (blame->nlines > 0) {
4416 			blame_line = &blame->lines[lineno - 1];
4417 			if (blame_line->annotated && prev_id &&
4418 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4419 			    !(view->focussed &&
4420 			    nprinted == s->selected_line - 1)) {
4421 				waddstr(view->window, "        ");
4422 			} else if (blame_line->annotated) {
4423 				char *id_str;
4424 				err = got_object_id_str(&id_str,
4425 				    blame_line->id);
4426 				if (err) {
4427 					free(line);
4428 					return err;
4429 				}
4430 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4431 				if (tc)
4432 					wattr_on(view->window,
4433 					    COLOR_PAIR(tc->colorpair), NULL);
4434 				wprintw(view->window, "%.8s", id_str);
4435 				if (tc)
4436 					wattr_off(view->window,
4437 					    COLOR_PAIR(tc->colorpair), NULL);
4438 				free(id_str);
4439 				prev_id = blame_line->id;
4440 			} else {
4441 				waddstr(view->window, "........");
4442 				prev_id = NULL;
4443 			}
4444 		} else {
4445 			waddstr(view->window, "........");
4446 			prev_id = NULL;
4447 		}
4448 
4449 		if (view->focussed && nprinted == s->selected_line - 1)
4450 			wstandend(view->window);
4451 		waddstr(view->window, " ");
4452 
4453 		if (view->ncols <= 9) {
4454 			width = 9;
4455 		} else if (s->first_displayed_line + nprinted ==
4456 		    s->matched_line &&
4457 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4458 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4459 			    view->window, view->x, regmatch);
4460 			if (err) {
4461 				free(line);
4462 				return err;
4463 			}
4464 			width += 9;
4465 		} else {
4466 			int skip;
4467 			err = format_line(&wline, &width, &skip, line,
4468 			    view->x, view->ncols - 9, 9, 1);
4469 			if (err) {
4470 				free(line);
4471 				return err;
4472 			}
4473 			waddwstr(view->window, &wline[skip]);
4474 			width += 9;
4475 			free(wline);
4476 			wline = NULL;
4477 		}
4478 
4479 		if (width <= view->ncols - 1)
4480 			waddch(view->window, '\n');
4481 		if (++nprinted == 1)
4482 			s->first_displayed_line = lineno;
4483 	}
4484 	free(line);
4485 	s->last_displayed_line = lineno;
4486 
4487 	view_vborder(view);
4488 
4489 	return NULL;
4490 }
4491 
4492 static const struct got_error *
4493 blame_cb(void *arg, int nlines, int lineno,
4494     struct got_commit_object *commit, struct got_object_id *id)
4495 {
4496 	const struct got_error *err = NULL;
4497 	struct tog_blame_cb_args *a = arg;
4498 	struct tog_blame_line *line;
4499 	int errcode;
4500 
4501 	if (nlines != a->nlines ||
4502 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4503 		return got_error(GOT_ERR_RANGE);
4504 
4505 	errcode = pthread_mutex_lock(&tog_mutex);
4506 	if (errcode)
4507 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4508 
4509 	if (*a->quit) {	/* user has quit the blame view */
4510 		err = got_error(GOT_ERR_ITER_COMPLETED);
4511 		goto done;
4512 	}
4513 
4514 	if (lineno == -1)
4515 		goto done; /* no change in this commit */
4516 
4517 	line = &a->lines[lineno - 1];
4518 	if (line->annotated)
4519 		goto done;
4520 
4521 	line->id = got_object_id_dup(id);
4522 	if (line->id == NULL) {
4523 		err = got_error_from_errno("got_object_id_dup");
4524 		goto done;
4525 	}
4526 	line->annotated = 1;
4527 done:
4528 	errcode = pthread_mutex_unlock(&tog_mutex);
4529 	if (errcode)
4530 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4531 	return err;
4532 }
4533 
4534 static void *
4535 blame_thread(void *arg)
4536 {
4537 	const struct got_error *err, *close_err;
4538 	struct tog_blame_thread_args *ta = arg;
4539 	struct tog_blame_cb_args *a = ta->cb_args;
4540 	int errcode;
4541 
4542 	err = block_signals_used_by_main_thread();
4543 	if (err)
4544 		return (void *)err;
4545 
4546 	err = got_blame(ta->path, a->commit_id, ta->repo,
4547 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4548 	if (err && err->code == GOT_ERR_CANCELLED)
4549 		err = NULL;
4550 
4551 	errcode = pthread_mutex_lock(&tog_mutex);
4552 	if (errcode)
4553 		return (void *)got_error_set_errno(errcode,
4554 		    "pthread_mutex_lock");
4555 
4556 	close_err = got_repo_close(ta->repo);
4557 	if (err == NULL)
4558 		err = close_err;
4559 	ta->repo = NULL;
4560 	*ta->complete = 1;
4561 
4562 	errcode = pthread_mutex_unlock(&tog_mutex);
4563 	if (errcode && err == NULL)
4564 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4565 
4566 	return (void *)err;
4567 }
4568 
4569 static struct got_object_id *
4570 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4571     int first_displayed_line, int selected_line)
4572 {
4573 	struct tog_blame_line *line;
4574 
4575 	if (nlines <= 0)
4576 		return NULL;
4577 
4578 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4579 	if (!line->annotated)
4580 		return NULL;
4581 
4582 	return line->id;
4583 }
4584 
4585 static const struct got_error *
4586 stop_blame(struct tog_blame *blame)
4587 {
4588 	const struct got_error *err = NULL;
4589 	int i;
4590 
4591 	if (blame->thread) {
4592 		int errcode;
4593 		errcode = pthread_mutex_unlock(&tog_mutex);
4594 		if (errcode)
4595 			return got_error_set_errno(errcode,
4596 			    "pthread_mutex_unlock");
4597 		errcode = pthread_join(blame->thread, (void **)&err);
4598 		if (errcode)
4599 			return got_error_set_errno(errcode, "pthread_join");
4600 		errcode = pthread_mutex_lock(&tog_mutex);
4601 		if (errcode)
4602 			return got_error_set_errno(errcode,
4603 			    "pthread_mutex_lock");
4604 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4605 			err = NULL;
4606 		blame->thread = 0; //NULL;
4607 	}
4608 	if (blame->thread_args.repo) {
4609 		const struct got_error *close_err;
4610 		close_err = got_repo_close(blame->thread_args.repo);
4611 		if (err == NULL)
4612 			err = close_err;
4613 		blame->thread_args.repo = NULL;
4614 	}
4615 	if (blame->f) {
4616 		if (fclose(blame->f) == EOF && err == NULL)
4617 			err = got_error_from_errno("fclose");
4618 		blame->f = NULL;
4619 	}
4620 	if (blame->lines) {
4621 		for (i = 0; i < blame->nlines; i++)
4622 			free(blame->lines[i].id);
4623 		free(blame->lines);
4624 		blame->lines = NULL;
4625 	}
4626 	free(blame->cb_args.commit_id);
4627 	blame->cb_args.commit_id = NULL;
4628 	if (blame->pack_fds) {
4629 		const struct got_error *pack_err =
4630 		    got_repo_pack_fds_close(blame->pack_fds);
4631 		if (err == NULL)
4632 			err = pack_err;
4633 		blame->pack_fds = NULL;
4634 	}
4635 	return err;
4636 }
4637 
4638 static const struct got_error *
4639 cancel_blame_view(void *arg)
4640 {
4641 	const struct got_error *err = NULL;
4642 	int *done = arg;
4643 	int errcode;
4644 
4645 	errcode = pthread_mutex_lock(&tog_mutex);
4646 	if (errcode)
4647 		return got_error_set_errno(errcode,
4648 		    "pthread_mutex_unlock");
4649 
4650 	if (*done)
4651 		err = got_error(GOT_ERR_CANCELLED);
4652 
4653 	errcode = pthread_mutex_unlock(&tog_mutex);
4654 	if (errcode)
4655 		return got_error_set_errno(errcode,
4656 		    "pthread_mutex_lock");
4657 
4658 	return err;
4659 }
4660 
4661 static const struct got_error *
4662 run_blame(struct tog_view *view)
4663 {
4664 	struct tog_blame_view_state *s = &view->state.blame;
4665 	struct tog_blame *blame = &s->blame;
4666 	const struct got_error *err = NULL;
4667 	struct got_commit_object *commit = NULL;
4668 	struct got_blob_object *blob = NULL;
4669 	struct got_repository *thread_repo = NULL;
4670 	struct got_object_id *obj_id = NULL;
4671 	int obj_type;
4672 	int *pack_fds = NULL;
4673 
4674 	err = got_object_open_as_commit(&commit, s->repo,
4675 	    &s->blamed_commit->id);
4676 	if (err)
4677 		return err;
4678 
4679 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4680 	if (err)
4681 		goto done;
4682 
4683 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4684 	if (err)
4685 		goto done;
4686 
4687 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4688 		err = got_error(GOT_ERR_OBJ_TYPE);
4689 		goto done;
4690 	}
4691 
4692 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4693 	if (err)
4694 		goto done;
4695 	blame->f = got_opentemp();
4696 	if (blame->f == NULL) {
4697 		err = got_error_from_errno("got_opentemp");
4698 		goto done;
4699 	}
4700 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4701 	    &blame->line_offsets, blame->f, blob);
4702 	if (err)
4703 		goto done;
4704 	if (blame->nlines == 0) {
4705 		s->blame_complete = 1;
4706 		goto done;
4707 	}
4708 
4709 	/* Don't include \n at EOF in the blame line count. */
4710 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4711 		blame->nlines--;
4712 
4713 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4714 	if (blame->lines == NULL) {
4715 		err = got_error_from_errno("calloc");
4716 		goto done;
4717 	}
4718 
4719 	err = got_repo_pack_fds_open(&pack_fds);
4720 	if (err)
4721 		goto done;
4722 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4723 	    pack_fds);
4724 	if (err)
4725 		goto done;
4726 
4727 	blame->pack_fds = pack_fds;
4728 	blame->cb_args.view = view;
4729 	blame->cb_args.lines = blame->lines;
4730 	blame->cb_args.nlines = blame->nlines;
4731 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4732 	if (blame->cb_args.commit_id == NULL) {
4733 		err = got_error_from_errno("got_object_id_dup");
4734 		goto done;
4735 	}
4736 	blame->cb_args.quit = &s->done;
4737 
4738 	blame->thread_args.path = s->path;
4739 	blame->thread_args.repo = thread_repo;
4740 	blame->thread_args.cb_args = &blame->cb_args;
4741 	blame->thread_args.complete = &s->blame_complete;
4742 	blame->thread_args.cancel_cb = cancel_blame_view;
4743 	blame->thread_args.cancel_arg = &s->done;
4744 	s->blame_complete = 0;
4745 
4746 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4747 		s->first_displayed_line = 1;
4748 		s->last_displayed_line = view->nlines;
4749 		s->selected_line = 1;
4750 	}
4751 	s->matched_line = 0;
4752 
4753 done:
4754 	if (commit)
4755 		got_object_commit_close(commit);
4756 	if (blob)
4757 		got_object_blob_close(blob);
4758 	free(obj_id);
4759 	if (err)
4760 		stop_blame(blame);
4761 	return err;
4762 }
4763 
4764 static const struct got_error *
4765 open_blame_view(struct tog_view *view, char *path,
4766     struct got_object_id *commit_id, struct got_repository *repo)
4767 {
4768 	const struct got_error *err = NULL;
4769 	struct tog_blame_view_state *s = &view->state.blame;
4770 
4771 	STAILQ_INIT(&s->blamed_commits);
4772 
4773 	s->path = strdup(path);
4774 	if (s->path == NULL)
4775 		return got_error_from_errno("strdup");
4776 
4777 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4778 	if (err) {
4779 		free(s->path);
4780 		return err;
4781 	}
4782 
4783 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4784 	s->first_displayed_line = 1;
4785 	s->last_displayed_line = view->nlines;
4786 	s->selected_line = 1;
4787 	s->blame_complete = 0;
4788 	s->repo = repo;
4789 	s->commit_id = commit_id;
4790 	memset(&s->blame, 0, sizeof(s->blame));
4791 
4792 	STAILQ_INIT(&s->colors);
4793 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4794 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4795 		    get_color_value("TOG_COLOR_COMMIT"));
4796 		if (err)
4797 			return err;
4798 	}
4799 
4800 	view->show = show_blame_view;
4801 	view->input = input_blame_view;
4802 	view->close = close_blame_view;
4803 	view->search_start = search_start_blame_view;
4804 	view->search_next = search_next_blame_view;
4805 
4806 	return run_blame(view);
4807 }
4808 
4809 static const struct got_error *
4810 close_blame_view(struct tog_view *view)
4811 {
4812 	const struct got_error *err = NULL;
4813 	struct tog_blame_view_state *s = &view->state.blame;
4814 
4815 	if (s->blame.thread)
4816 		err = stop_blame(&s->blame);
4817 
4818 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4819 		struct got_object_qid *blamed_commit;
4820 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4821 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4822 		got_object_qid_free(blamed_commit);
4823 	}
4824 
4825 	free(s->path);
4826 	free_colors(&s->colors);
4827 	return err;
4828 }
4829 
4830 static const struct got_error *
4831 search_start_blame_view(struct tog_view *view)
4832 {
4833 	struct tog_blame_view_state *s = &view->state.blame;
4834 
4835 	s->matched_line = 0;
4836 	return NULL;
4837 }
4838 
4839 static const struct got_error *
4840 search_next_blame_view(struct tog_view *view)
4841 {
4842 	struct tog_blame_view_state *s = &view->state.blame;
4843 	const struct got_error *err = NULL;
4844 	int lineno;
4845 	char *line = NULL;
4846 	size_t linesize = 0;
4847 	ssize_t linelen;
4848 
4849 	if (!view->searching) {
4850 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4851 		return NULL;
4852 	}
4853 
4854 	if (s->matched_line) {
4855 		if (view->searching == TOG_SEARCH_FORWARD)
4856 			lineno = s->matched_line + 1;
4857 		else
4858 			lineno = s->matched_line - 1;
4859 	} else
4860 		lineno = s->first_displayed_line - 1 + s->selected_line;
4861 
4862 	while (1) {
4863 		off_t offset;
4864 
4865 		if (lineno <= 0 || lineno > s->blame.nlines) {
4866 			if (s->matched_line == 0) {
4867 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4868 				break;
4869 			}
4870 
4871 			if (view->searching == TOG_SEARCH_FORWARD)
4872 				lineno = 1;
4873 			else
4874 				lineno = s->blame.nlines;
4875 		}
4876 
4877 		offset = s->blame.line_offsets[lineno - 1];
4878 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4879 			free(line);
4880 			return got_error_from_errno("fseeko");
4881 		}
4882 		linelen = getline(&line, &linesize, s->blame.f);
4883 		if (linelen != -1) {
4884 			char *exstr;
4885 			err = expand_tab(&exstr, line);
4886 			if (err)
4887 				break;
4888 			if (match_line(exstr, &view->regex, 1,
4889 			    &view->regmatch)) {
4890 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4891 				s->matched_line = lineno;
4892 				free(exstr);
4893 				break;
4894 			}
4895 			free(exstr);
4896 		}
4897 		if (view->searching == TOG_SEARCH_FORWARD)
4898 			lineno++;
4899 		else
4900 			lineno--;
4901 	}
4902 	free(line);
4903 
4904 	if (s->matched_line) {
4905 		s->first_displayed_line = s->matched_line;
4906 		s->selected_line = 1;
4907 	}
4908 
4909 	return err;
4910 }
4911 
4912 static const struct got_error *
4913 show_blame_view(struct tog_view *view)
4914 {
4915 	const struct got_error *err = NULL;
4916 	struct tog_blame_view_state *s = &view->state.blame;
4917 	int errcode;
4918 
4919 	if (s->blame.thread == 0 && !s->blame_complete) {
4920 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4921 		    &s->blame.thread_args);
4922 		if (errcode)
4923 			return got_error_set_errno(errcode, "pthread_create");
4924 
4925 		halfdelay(1); /* fast refresh while annotating  */
4926 	}
4927 
4928 	if (s->blame_complete)
4929 		halfdelay(10); /* disable fast refresh */
4930 
4931 	err = draw_blame(view);
4932 
4933 	view_vborder(view);
4934 	return err;
4935 }
4936 
4937 static const struct got_error *
4938 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4939 {
4940 	const struct got_error *err = NULL, *thread_err = NULL;
4941 	struct tog_view *diff_view;
4942 	struct tog_blame_view_state *s = &view->state.blame;
4943 	int begin_x = 0, nscroll = view->nlines - 2;
4944 
4945 	switch (ch) {
4946 	case '0':
4947 		view->x = 0;
4948 		break;
4949 	case '$':
4950 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4951 		break;
4952 	case KEY_RIGHT:
4953 	case 'l':
4954 		if (view->x + view->ncols / 3 < view->maxx)
4955 			view->x += 2;  /* move two columns right */
4956 		break;
4957 	case KEY_LEFT:
4958 	case 'h':
4959 		view->x -= MIN(view->x, 2);  /* move two columns back */
4960 		break;
4961 	case 'q':
4962 		s->done = 1;
4963 		break;
4964 	case 'g':
4965 	case KEY_HOME:
4966 		s->selected_line = 1;
4967 		s->first_displayed_line = 1;
4968 		break;
4969 	case 'G':
4970 	case KEY_END:
4971 		if (s->blame.nlines < view->nlines - 2) {
4972 			s->selected_line = s->blame.nlines;
4973 			s->first_displayed_line = 1;
4974 		} else {
4975 			s->selected_line = view->nlines - 2;
4976 			s->first_displayed_line = s->blame.nlines -
4977 			    (view->nlines - 3);
4978 		}
4979 		break;
4980 	case 'k':
4981 	case KEY_UP:
4982 	case CTRL('p'):
4983 		if (s->selected_line > 1)
4984 			s->selected_line--;
4985 		else if (s->selected_line == 1 &&
4986 		    s->first_displayed_line > 1)
4987 			s->first_displayed_line--;
4988 		break;
4989 	case CTRL('u'):
4990 	case 'u':
4991 		nscroll /= 2;
4992 		/* FALL THROUGH */
4993 	case KEY_PPAGE:
4994 	case CTRL('b'):
4995 		if (s->first_displayed_line == 1) {
4996 			s->selected_line = MAX(1, s->selected_line - nscroll);
4997 			break;
4998 		}
4999 		if (s->first_displayed_line > nscroll)
5000 			s->first_displayed_line -= nscroll;
5001 		else
5002 			s->first_displayed_line = 1;
5003 		break;
5004 	case 'j':
5005 	case KEY_DOWN:
5006 	case CTRL('n'):
5007 		if (s->selected_line < view->nlines - 2 &&
5008 		    s->first_displayed_line +
5009 		    s->selected_line <= s->blame.nlines)
5010 			s->selected_line++;
5011 		else if (s->last_displayed_line <
5012 		    s->blame.nlines)
5013 			s->first_displayed_line++;
5014 		break;
5015 	case 'b':
5016 	case 'p': {
5017 		struct got_object_id *id = NULL;
5018 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5019 		    s->first_displayed_line, s->selected_line);
5020 		if (id == NULL)
5021 			break;
5022 		if (ch == 'p') {
5023 			struct got_commit_object *commit, *pcommit;
5024 			struct got_object_qid *pid;
5025 			struct got_object_id *blob_id = NULL;
5026 			int obj_type;
5027 			err = got_object_open_as_commit(&commit,
5028 			    s->repo, id);
5029 			if (err)
5030 				break;
5031 			pid = STAILQ_FIRST(
5032 			    got_object_commit_get_parent_ids(commit));
5033 			if (pid == NULL) {
5034 				got_object_commit_close(commit);
5035 				break;
5036 			}
5037 			/* Check if path history ends here. */
5038 			err = got_object_open_as_commit(&pcommit,
5039 			    s->repo, &pid->id);
5040 			if (err)
5041 				break;
5042 			err = got_object_id_by_path(&blob_id, s->repo,
5043 			    pcommit, s->path);
5044 			got_object_commit_close(pcommit);
5045 			if (err) {
5046 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5047 					err = NULL;
5048 				got_object_commit_close(commit);
5049 				break;
5050 			}
5051 			err = got_object_get_type(&obj_type, s->repo,
5052 			    blob_id);
5053 			free(blob_id);
5054 			/* Can't blame non-blob type objects. */
5055 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5056 				got_object_commit_close(commit);
5057 				break;
5058 			}
5059 			err = got_object_qid_alloc(&s->blamed_commit,
5060 			    &pid->id);
5061 			got_object_commit_close(commit);
5062 		} else {
5063 			if (got_object_id_cmp(id,
5064 			    &s->blamed_commit->id) == 0)
5065 				break;
5066 			err = got_object_qid_alloc(&s->blamed_commit,
5067 			    id);
5068 		}
5069 		if (err)
5070 			break;
5071 		s->done = 1;
5072 		thread_err = stop_blame(&s->blame);
5073 		s->done = 0;
5074 		if (thread_err)
5075 			break;
5076 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5077 		    s->blamed_commit, entry);
5078 		err = run_blame(view);
5079 		if (err)
5080 			break;
5081 		break;
5082 	}
5083 	case 'B': {
5084 		struct got_object_qid *first;
5085 		first = STAILQ_FIRST(&s->blamed_commits);
5086 		if (!got_object_id_cmp(&first->id, s->commit_id))
5087 			break;
5088 		s->done = 1;
5089 		thread_err = stop_blame(&s->blame);
5090 		s->done = 0;
5091 		if (thread_err)
5092 			break;
5093 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5094 		got_object_qid_free(s->blamed_commit);
5095 		s->blamed_commit =
5096 		    STAILQ_FIRST(&s->blamed_commits);
5097 		err = run_blame(view);
5098 		if (err)
5099 			break;
5100 		break;
5101 	}
5102 	case KEY_ENTER:
5103 	case '\r': {
5104 		struct got_object_id *id = NULL;
5105 		struct got_object_qid *pid;
5106 		struct got_commit_object *commit = NULL;
5107 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5108 		    s->first_displayed_line, s->selected_line);
5109 		if (id == NULL)
5110 			break;
5111 		err = got_object_open_as_commit(&commit, s->repo, id);
5112 		if (err)
5113 			break;
5114 		pid = STAILQ_FIRST(
5115 		    got_object_commit_get_parent_ids(commit));
5116 		if (view_is_parent_view(view))
5117 		    begin_x = view_split_begin_x(view->begin_x);
5118 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5119 		if (diff_view == NULL) {
5120 			got_object_commit_close(commit);
5121 			err = got_error_from_errno("view_open");
5122 			break;
5123 		}
5124 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5125 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5126 		got_object_commit_close(commit);
5127 		if (err) {
5128 			view_close(diff_view);
5129 			break;
5130 		}
5131 		view->focussed = 0;
5132 		diff_view->focussed = 1;
5133 		if (view_is_parent_view(view)) {
5134 			err = view_close_child(view);
5135 			if (err)
5136 				break;
5137 			err = view_set_child(view, diff_view);
5138 			if (err)
5139 				break;
5140 			view->focus_child = 1;
5141 		} else
5142 			*new_view = diff_view;
5143 		if (err)
5144 			break;
5145 		break;
5146 	}
5147 	case CTRL('d'):
5148 	case 'd':
5149 		nscroll /= 2;
5150 		/* FALL THROUGH */
5151 	case KEY_NPAGE:
5152 	case CTRL('f'):
5153 	case ' ':
5154 		if (s->last_displayed_line >= s->blame.nlines &&
5155 		    s->selected_line >= MIN(s->blame.nlines,
5156 		    view->nlines - 2)) {
5157 			break;
5158 		}
5159 		if (s->last_displayed_line >= s->blame.nlines &&
5160 		    s->selected_line < view->nlines - 2) {
5161 			s->selected_line +=
5162 			    MIN(nscroll, s->last_displayed_line -
5163 			    s->first_displayed_line - s->selected_line + 1);
5164 		}
5165 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5166 			s->first_displayed_line += nscroll;
5167 		else
5168 			s->first_displayed_line =
5169 			    s->blame.nlines - (view->nlines - 3);
5170 		break;
5171 	case KEY_RESIZE:
5172 		if (s->selected_line > view->nlines - 2) {
5173 			s->selected_line = MIN(s->blame.nlines,
5174 			    view->nlines - 2);
5175 		}
5176 		break;
5177 	default:
5178 		break;
5179 	}
5180 	return thread_err ? thread_err : err;
5181 }
5182 
5183 static const struct got_error *
5184 cmd_blame(int argc, char *argv[])
5185 {
5186 	const struct got_error *error;
5187 	struct got_repository *repo = NULL;
5188 	struct got_worktree *worktree = NULL;
5189 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5190 	char *link_target = NULL;
5191 	struct got_object_id *commit_id = NULL;
5192 	struct got_commit_object *commit = NULL;
5193 	char *commit_id_str = NULL;
5194 	int ch;
5195 	struct tog_view *view;
5196 	int *pack_fds = NULL;
5197 
5198 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5199 		switch (ch) {
5200 		case 'c':
5201 			commit_id_str = optarg;
5202 			break;
5203 		case 'r':
5204 			repo_path = realpath(optarg, NULL);
5205 			if (repo_path == NULL)
5206 				return got_error_from_errno2("realpath",
5207 				    optarg);
5208 			break;
5209 		default:
5210 			usage_blame();
5211 			/* NOTREACHED */
5212 		}
5213 	}
5214 
5215 	argc -= optind;
5216 	argv += optind;
5217 
5218 	if (argc != 1)
5219 		usage_blame();
5220 
5221 	error = got_repo_pack_fds_open(&pack_fds);
5222 	if (error != NULL)
5223 		goto done;
5224 
5225 	if (repo_path == NULL) {
5226 		cwd = getcwd(NULL, 0);
5227 		if (cwd == NULL)
5228 			return got_error_from_errno("getcwd");
5229 		error = got_worktree_open(&worktree, cwd);
5230 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5231 			goto done;
5232 		if (worktree)
5233 			repo_path =
5234 			    strdup(got_worktree_get_repo_path(worktree));
5235 		else
5236 			repo_path = strdup(cwd);
5237 		if (repo_path == NULL) {
5238 			error = got_error_from_errno("strdup");
5239 			goto done;
5240 		}
5241 	}
5242 
5243 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5244 	if (error != NULL)
5245 		goto done;
5246 
5247 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5248 	    worktree);
5249 	if (error)
5250 		goto done;
5251 
5252 	init_curses();
5253 
5254 	error = apply_unveil(got_repo_get_path(repo), NULL);
5255 	if (error)
5256 		goto done;
5257 
5258 	error = tog_load_refs(repo, 0);
5259 	if (error)
5260 		goto done;
5261 
5262 	if (commit_id_str == NULL) {
5263 		struct got_reference *head_ref;
5264 		error = got_ref_open(&head_ref, repo, worktree ?
5265 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5266 		if (error != NULL)
5267 			goto done;
5268 		error = got_ref_resolve(&commit_id, repo, head_ref);
5269 		got_ref_close(head_ref);
5270 	} else {
5271 		error = got_repo_match_object_id(&commit_id, NULL,
5272 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5273 	}
5274 	if (error != NULL)
5275 		goto done;
5276 
5277 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5278 	if (view == NULL) {
5279 		error = got_error_from_errno("view_open");
5280 		goto done;
5281 	}
5282 
5283 	error = got_object_open_as_commit(&commit, repo, commit_id);
5284 	if (error)
5285 		goto done;
5286 
5287 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5288 	    commit, repo);
5289 	if (error)
5290 		goto done;
5291 
5292 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5293 	    commit_id, repo);
5294 	if (error)
5295 		goto done;
5296 	if (worktree) {
5297 		/* Release work tree lock. */
5298 		got_worktree_close(worktree);
5299 		worktree = NULL;
5300 	}
5301 	error = view_loop(view);
5302 done:
5303 	free(repo_path);
5304 	free(in_repo_path);
5305 	free(link_target);
5306 	free(cwd);
5307 	free(commit_id);
5308 	if (commit)
5309 		got_object_commit_close(commit);
5310 	if (worktree)
5311 		got_worktree_close(worktree);
5312 	if (repo) {
5313 		const struct got_error *close_err = got_repo_close(repo);
5314 		if (error == NULL)
5315 			error = close_err;
5316 	}
5317 	if (pack_fds) {
5318 		const struct got_error *pack_err =
5319 		    got_repo_pack_fds_close(pack_fds);
5320 		if (error == NULL)
5321 			error = pack_err;
5322 	}
5323 	tog_free_refs();
5324 	return error;
5325 }
5326 
5327 static const struct got_error *
5328 draw_tree_entries(struct tog_view *view, const char *parent_path)
5329 {
5330 	struct tog_tree_view_state *s = &view->state.tree;
5331 	const struct got_error *err = NULL;
5332 	struct got_tree_entry *te;
5333 	wchar_t *wline;
5334 	struct tog_color *tc;
5335 	int width, n, i, nentries;
5336 	int limit = view->nlines;
5337 
5338 	s->ndisplayed = 0;
5339 
5340 	werase(view->window);
5341 
5342 	if (limit == 0)
5343 		return NULL;
5344 
5345 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5346 	    0, 0);
5347 	if (err)
5348 		return err;
5349 	if (view_needs_focus_indication(view))
5350 		wstandout(view->window);
5351 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5352 	if (tc)
5353 		wattr_on(view->window,
5354 		    COLOR_PAIR(tc->colorpair), NULL);
5355 	waddwstr(view->window, wline);
5356 	if (tc)
5357 		wattr_off(view->window,
5358 		    COLOR_PAIR(tc->colorpair), NULL);
5359 	if (view_needs_focus_indication(view))
5360 		wstandend(view->window);
5361 	free(wline);
5362 	wline = NULL;
5363 	if (width < view->ncols - 1)
5364 		waddch(view->window, '\n');
5365 	if (--limit <= 0)
5366 		return NULL;
5367 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5368 	    0, 0);
5369 	if (err)
5370 		return err;
5371 	waddwstr(view->window, wline);
5372 	free(wline);
5373 	wline = NULL;
5374 	if (width < view->ncols - 1)
5375 		waddch(view->window, '\n');
5376 	if (--limit <= 0)
5377 		return NULL;
5378 	waddch(view->window, '\n');
5379 	if (--limit <= 0)
5380 		return NULL;
5381 
5382 	if (s->first_displayed_entry == NULL) {
5383 		te = got_object_tree_get_first_entry(s->tree);
5384 		if (s->selected == 0) {
5385 			if (view->focussed)
5386 				wstandout(view->window);
5387 			s->selected_entry = NULL;
5388 		}
5389 		waddstr(view->window, "  ..\n");	/* parent directory */
5390 		if (s->selected == 0 && view->focussed)
5391 			wstandend(view->window);
5392 		s->ndisplayed++;
5393 		if (--limit <= 0)
5394 			return NULL;
5395 		n = 1;
5396 	} else {
5397 		n = 0;
5398 		te = s->first_displayed_entry;
5399 	}
5400 
5401 	nentries = got_object_tree_get_nentries(s->tree);
5402 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5403 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5404 		const char *modestr = "";
5405 		mode_t mode;
5406 
5407 		te = got_object_tree_get_entry(s->tree, i);
5408 		mode = got_tree_entry_get_mode(te);
5409 
5410 		if (s->show_ids) {
5411 			err = got_object_id_str(&id_str,
5412 			    got_tree_entry_get_id(te));
5413 			if (err)
5414 				return got_error_from_errno(
5415 				    "got_object_id_str");
5416 		}
5417 		if (got_object_tree_entry_is_submodule(te))
5418 			modestr = "$";
5419 		else if (S_ISLNK(mode)) {
5420 			int i;
5421 
5422 			err = got_tree_entry_get_symlink_target(&link_target,
5423 			    te, s->repo);
5424 			if (err) {
5425 				free(id_str);
5426 				return err;
5427 			}
5428 			for (i = 0; i < strlen(link_target); i++) {
5429 				if (!isprint((unsigned char)link_target[i]))
5430 					link_target[i] = '?';
5431 			}
5432 			modestr = "@";
5433 		}
5434 		else if (S_ISDIR(mode))
5435 			modestr = "/";
5436 		else if (mode & S_IXUSR)
5437 			modestr = "*";
5438 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5439 		    got_tree_entry_get_name(te), modestr,
5440 		    link_target ? " -> ": "",
5441 		    link_target ? link_target : "") == -1) {
5442 			free(id_str);
5443 			free(link_target);
5444 			return got_error_from_errno("asprintf");
5445 		}
5446 		free(id_str);
5447 		free(link_target);
5448 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5449 		    0, 0);
5450 		if (err) {
5451 			free(line);
5452 			break;
5453 		}
5454 		if (n == s->selected) {
5455 			if (view->focussed)
5456 				wstandout(view->window);
5457 			s->selected_entry = te;
5458 		}
5459 		tc = match_color(&s->colors, line);
5460 		if (tc)
5461 			wattr_on(view->window,
5462 			    COLOR_PAIR(tc->colorpair), NULL);
5463 		waddwstr(view->window, wline);
5464 		if (tc)
5465 			wattr_off(view->window,
5466 			    COLOR_PAIR(tc->colorpair), NULL);
5467 		if (width < view->ncols - 1)
5468 			waddch(view->window, '\n');
5469 		if (n == s->selected && view->focussed)
5470 			wstandend(view->window);
5471 		free(line);
5472 		free(wline);
5473 		wline = NULL;
5474 		n++;
5475 		s->ndisplayed++;
5476 		s->last_displayed_entry = te;
5477 		if (--limit <= 0)
5478 			break;
5479 	}
5480 
5481 	return err;
5482 }
5483 
5484 static void
5485 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5486 {
5487 	struct got_tree_entry *te;
5488 	int isroot = s->tree == s->root;
5489 	int i = 0;
5490 
5491 	if (s->first_displayed_entry == NULL)
5492 		return;
5493 
5494 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5495 	while (i++ < maxscroll) {
5496 		if (te == NULL) {
5497 			if (!isroot)
5498 				s->first_displayed_entry = NULL;
5499 			break;
5500 		}
5501 		s->first_displayed_entry = te;
5502 		te = got_tree_entry_get_prev(s->tree, te);
5503 	}
5504 }
5505 
5506 static void
5507 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5508 {
5509 	struct got_tree_entry *next, *last;
5510 	int n = 0;
5511 
5512 	if (s->first_displayed_entry)
5513 		next = got_tree_entry_get_next(s->tree,
5514 		    s->first_displayed_entry);
5515 	else
5516 		next = got_object_tree_get_first_entry(s->tree);
5517 
5518 	last = s->last_displayed_entry;
5519 	while (next && last && n++ < maxscroll) {
5520 		last = got_tree_entry_get_next(s->tree, last);
5521 		if (last) {
5522 			s->first_displayed_entry = next;
5523 			next = got_tree_entry_get_next(s->tree, next);
5524 		}
5525 	}
5526 }
5527 
5528 static const struct got_error *
5529 tree_entry_path(char **path, struct tog_parent_trees *parents,
5530     struct got_tree_entry *te)
5531 {
5532 	const struct got_error *err = NULL;
5533 	struct tog_parent_tree *pt;
5534 	size_t len = 2; /* for leading slash and NUL */
5535 
5536 	TAILQ_FOREACH(pt, parents, entry)
5537 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5538 		    + 1 /* slash */;
5539 	if (te)
5540 		len += strlen(got_tree_entry_get_name(te));
5541 
5542 	*path = calloc(1, len);
5543 	if (path == NULL)
5544 		return got_error_from_errno("calloc");
5545 
5546 	(*path)[0] = '/';
5547 	pt = TAILQ_LAST(parents, tog_parent_trees);
5548 	while (pt) {
5549 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5550 		if (strlcat(*path, name, len) >= len) {
5551 			err = got_error(GOT_ERR_NO_SPACE);
5552 			goto done;
5553 		}
5554 		if (strlcat(*path, "/", len) >= len) {
5555 			err = got_error(GOT_ERR_NO_SPACE);
5556 			goto done;
5557 		}
5558 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5559 	}
5560 	if (te) {
5561 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5562 			err = got_error(GOT_ERR_NO_SPACE);
5563 			goto done;
5564 		}
5565 	}
5566 done:
5567 	if (err) {
5568 		free(*path);
5569 		*path = NULL;
5570 	}
5571 	return err;
5572 }
5573 
5574 static const struct got_error *
5575 blame_tree_entry(struct tog_view **new_view, int begin_x,
5576     struct got_tree_entry *te, struct tog_parent_trees *parents,
5577     struct got_object_id *commit_id, struct got_repository *repo)
5578 {
5579 	const struct got_error *err = NULL;
5580 	char *path;
5581 	struct tog_view *blame_view;
5582 
5583 	*new_view = NULL;
5584 
5585 	err = tree_entry_path(&path, parents, te);
5586 	if (err)
5587 		return err;
5588 
5589 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5590 	if (blame_view == NULL) {
5591 		err = got_error_from_errno("view_open");
5592 		goto done;
5593 	}
5594 
5595 	err = open_blame_view(blame_view, path, commit_id, repo);
5596 	if (err) {
5597 		if (err->code == GOT_ERR_CANCELLED)
5598 			err = NULL;
5599 		view_close(blame_view);
5600 	} else
5601 		*new_view = blame_view;
5602 done:
5603 	free(path);
5604 	return err;
5605 }
5606 
5607 static const struct got_error *
5608 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5609     struct tog_tree_view_state *s)
5610 {
5611 	struct tog_view *log_view;
5612 	const struct got_error *err = NULL;
5613 	char *path;
5614 
5615 	*new_view = NULL;
5616 
5617 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5618 	if (log_view == NULL)
5619 		return got_error_from_errno("view_open");
5620 
5621 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5622 	if (err)
5623 		return err;
5624 
5625 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5626 	    path, 0);
5627 	if (err)
5628 		view_close(log_view);
5629 	else
5630 		*new_view = log_view;
5631 	free(path);
5632 	return err;
5633 }
5634 
5635 static const struct got_error *
5636 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5637     const char *head_ref_name, struct got_repository *repo)
5638 {
5639 	const struct got_error *err = NULL;
5640 	char *commit_id_str = NULL;
5641 	struct tog_tree_view_state *s = &view->state.tree;
5642 	struct got_commit_object *commit = NULL;
5643 
5644 	TAILQ_INIT(&s->parents);
5645 	STAILQ_INIT(&s->colors);
5646 
5647 	s->commit_id = got_object_id_dup(commit_id);
5648 	if (s->commit_id == NULL)
5649 		return got_error_from_errno("got_object_id_dup");
5650 
5651 	err = got_object_open_as_commit(&commit, repo, commit_id);
5652 	if (err)
5653 		goto done;
5654 
5655 	/*
5656 	 * The root is opened here and will be closed when the view is closed.
5657 	 * Any visited subtrees and their path-wise parents are opened and
5658 	 * closed on demand.
5659 	 */
5660 	err = got_object_open_as_tree(&s->root, repo,
5661 	    got_object_commit_get_tree_id(commit));
5662 	if (err)
5663 		goto done;
5664 	s->tree = s->root;
5665 
5666 	err = got_object_id_str(&commit_id_str, commit_id);
5667 	if (err != NULL)
5668 		goto done;
5669 
5670 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5671 		err = got_error_from_errno("asprintf");
5672 		goto done;
5673 	}
5674 
5675 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5676 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5677 	if (head_ref_name) {
5678 		s->head_ref_name = strdup(head_ref_name);
5679 		if (s->head_ref_name == NULL) {
5680 			err = got_error_from_errno("strdup");
5681 			goto done;
5682 		}
5683 	}
5684 	s->repo = repo;
5685 
5686 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5687 		err = add_color(&s->colors, "\\$$",
5688 		    TOG_COLOR_TREE_SUBMODULE,
5689 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5690 		if (err)
5691 			goto done;
5692 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5693 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5694 		if (err)
5695 			goto done;
5696 		err = add_color(&s->colors, "/$",
5697 		    TOG_COLOR_TREE_DIRECTORY,
5698 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5699 		if (err)
5700 			goto done;
5701 
5702 		err = add_color(&s->colors, "\\*$",
5703 		    TOG_COLOR_TREE_EXECUTABLE,
5704 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5705 		if (err)
5706 			goto done;
5707 
5708 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5709 		    get_color_value("TOG_COLOR_COMMIT"));
5710 		if (err)
5711 			goto done;
5712 	}
5713 
5714 	view->show = show_tree_view;
5715 	view->input = input_tree_view;
5716 	view->close = close_tree_view;
5717 	view->search_start = search_start_tree_view;
5718 	view->search_next = search_next_tree_view;
5719 done:
5720 	free(commit_id_str);
5721 	if (commit)
5722 		got_object_commit_close(commit);
5723 	if (err)
5724 		close_tree_view(view);
5725 	return err;
5726 }
5727 
5728 static const struct got_error *
5729 close_tree_view(struct tog_view *view)
5730 {
5731 	struct tog_tree_view_state *s = &view->state.tree;
5732 
5733 	free_colors(&s->colors);
5734 	free(s->tree_label);
5735 	s->tree_label = NULL;
5736 	free(s->commit_id);
5737 	s->commit_id = NULL;
5738 	free(s->head_ref_name);
5739 	s->head_ref_name = NULL;
5740 	while (!TAILQ_EMPTY(&s->parents)) {
5741 		struct tog_parent_tree *parent;
5742 		parent = TAILQ_FIRST(&s->parents);
5743 		TAILQ_REMOVE(&s->parents, parent, entry);
5744 		if (parent->tree != s->root)
5745 			got_object_tree_close(parent->tree);
5746 		free(parent);
5747 
5748 	}
5749 	if (s->tree != NULL && s->tree != s->root)
5750 		got_object_tree_close(s->tree);
5751 	if (s->root)
5752 		got_object_tree_close(s->root);
5753 	return NULL;
5754 }
5755 
5756 static const struct got_error *
5757 search_start_tree_view(struct tog_view *view)
5758 {
5759 	struct tog_tree_view_state *s = &view->state.tree;
5760 
5761 	s->matched_entry = NULL;
5762 	return NULL;
5763 }
5764 
5765 static int
5766 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5767 {
5768 	regmatch_t regmatch;
5769 
5770 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5771 	    0) == 0;
5772 }
5773 
5774 static const struct got_error *
5775 search_next_tree_view(struct tog_view *view)
5776 {
5777 	struct tog_tree_view_state *s = &view->state.tree;
5778 	struct got_tree_entry *te = NULL;
5779 
5780 	if (!view->searching) {
5781 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5782 		return NULL;
5783 	}
5784 
5785 	if (s->matched_entry) {
5786 		if (view->searching == TOG_SEARCH_FORWARD) {
5787 			if (s->selected_entry)
5788 				te = got_tree_entry_get_next(s->tree,
5789 				    s->selected_entry);
5790 			else
5791 				te = got_object_tree_get_first_entry(s->tree);
5792 		} else {
5793 			if (s->selected_entry == NULL)
5794 				te = got_object_tree_get_last_entry(s->tree);
5795 			else
5796 				te = got_tree_entry_get_prev(s->tree,
5797 				    s->selected_entry);
5798 		}
5799 	} else {
5800 		if (s->selected_entry)
5801 			te = s->selected_entry;
5802 		else if (view->searching == TOG_SEARCH_FORWARD)
5803 			te = got_object_tree_get_first_entry(s->tree);
5804 		else
5805 			te = got_object_tree_get_last_entry(s->tree);
5806 	}
5807 
5808 	while (1) {
5809 		if (te == NULL) {
5810 			if (s->matched_entry == NULL) {
5811 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5812 				return NULL;
5813 			}
5814 			if (view->searching == TOG_SEARCH_FORWARD)
5815 				te = got_object_tree_get_first_entry(s->tree);
5816 			else
5817 				te = got_object_tree_get_last_entry(s->tree);
5818 		}
5819 
5820 		if (match_tree_entry(te, &view->regex)) {
5821 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5822 			s->matched_entry = te;
5823 			break;
5824 		}
5825 
5826 		if (view->searching == TOG_SEARCH_FORWARD)
5827 			te = got_tree_entry_get_next(s->tree, te);
5828 		else
5829 			te = got_tree_entry_get_prev(s->tree, te);
5830 	}
5831 
5832 	if (s->matched_entry) {
5833 		s->first_displayed_entry = s->matched_entry;
5834 		s->selected = 0;
5835 	}
5836 
5837 	return NULL;
5838 }
5839 
5840 static const struct got_error *
5841 show_tree_view(struct tog_view *view)
5842 {
5843 	const struct got_error *err = NULL;
5844 	struct tog_tree_view_state *s = &view->state.tree;
5845 	char *parent_path;
5846 
5847 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5848 	if (err)
5849 		return err;
5850 
5851 	err = draw_tree_entries(view, parent_path);
5852 	free(parent_path);
5853 
5854 	view_vborder(view);
5855 	return err;
5856 }
5857 
5858 static const struct got_error *
5859 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5860 {
5861 	const struct got_error *err = NULL;
5862 	struct tog_tree_view_state *s = &view->state.tree;
5863 	struct tog_view *log_view, *ref_view;
5864 	struct got_tree_entry *te;
5865 	int begin_x = 0, n, nscroll = view->nlines - 3;
5866 
5867 	switch (ch) {
5868 	case 'i':
5869 		s->show_ids = !s->show_ids;
5870 		break;
5871 	case 'l':
5872 		if (!s->selected_entry)
5873 			break;
5874 		if (view_is_parent_view(view))
5875 			begin_x = view_split_begin_x(view->begin_x);
5876 		err = log_selected_tree_entry(&log_view, begin_x, s);
5877 		view->focussed = 0;
5878 		log_view->focussed = 1;
5879 		if (view_is_parent_view(view)) {
5880 			err = view_close_child(view);
5881 			if (err)
5882 				return err;
5883 			err = view_set_child(view, log_view);
5884 			if (err)
5885 				return err;
5886 			view->focus_child = 1;
5887 		} else
5888 			*new_view = log_view;
5889 		break;
5890 	case 'r':
5891 		if (view_is_parent_view(view))
5892 			begin_x = view_split_begin_x(view->begin_x);
5893 		ref_view = view_open(view->nlines, view->ncols,
5894 		    view->begin_y, begin_x, TOG_VIEW_REF);
5895 		if (ref_view == NULL)
5896 			return got_error_from_errno("view_open");
5897 		err = open_ref_view(ref_view, s->repo);
5898 		if (err) {
5899 			view_close(ref_view);
5900 			return err;
5901 		}
5902 		view->focussed = 0;
5903 		ref_view->focussed = 1;
5904 		if (view_is_parent_view(view)) {
5905 			err = view_close_child(view);
5906 			if (err)
5907 				return err;
5908 			err = view_set_child(view, ref_view);
5909 			if (err)
5910 				return err;
5911 			view->focus_child = 1;
5912 		} else
5913 			*new_view = ref_view;
5914 		break;
5915 	case 'g':
5916 	case KEY_HOME:
5917 		s->selected = 0;
5918 		if (s->tree == s->root)
5919 			s->first_displayed_entry =
5920 			    got_object_tree_get_first_entry(s->tree);
5921 		else
5922 			s->first_displayed_entry = NULL;
5923 		break;
5924 	case 'G':
5925 	case KEY_END:
5926 		s->selected = 0;
5927 		te = got_object_tree_get_last_entry(s->tree);
5928 		for (n = 0; n < view->nlines - 3; n++) {
5929 			if (te == NULL) {
5930 				if(s->tree != s->root) {
5931 					s->first_displayed_entry = NULL;
5932 					n++;
5933 				}
5934 				break;
5935 			}
5936 			s->first_displayed_entry = te;
5937 			te = got_tree_entry_get_prev(s->tree, te);
5938 		}
5939 		if (n > 0)
5940 			s->selected = n - 1;
5941 		break;
5942 	case 'k':
5943 	case KEY_UP:
5944 	case CTRL('p'):
5945 		if (s->selected > 0) {
5946 			s->selected--;
5947 			break;
5948 		}
5949 		tree_scroll_up(s, 1);
5950 		break;
5951 	case CTRL('u'):
5952 	case 'u':
5953 		nscroll /= 2;
5954 		/* FALL THROUGH */
5955 	case KEY_PPAGE:
5956 	case CTRL('b'):
5957 		if (s->tree == s->root) {
5958 			if (got_object_tree_get_first_entry(s->tree) ==
5959 			    s->first_displayed_entry)
5960 				s->selected -= MIN(s->selected, nscroll);
5961 		} else {
5962 			if (s->first_displayed_entry == NULL)
5963 				s->selected -= MIN(s->selected, nscroll);
5964 		}
5965 		tree_scroll_up(s, MAX(0, nscroll));
5966 		break;
5967 	case 'j':
5968 	case KEY_DOWN:
5969 	case CTRL('n'):
5970 		if (s->selected < s->ndisplayed - 1) {
5971 			s->selected++;
5972 			break;
5973 		}
5974 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5975 		    == NULL)
5976 			/* can't scroll any further */
5977 			break;
5978 		tree_scroll_down(s, 1);
5979 		break;
5980 	case CTRL('d'):
5981 	case 'd':
5982 		nscroll /= 2;
5983 		/* FALL THROUGH */
5984 	case KEY_NPAGE:
5985 	case CTRL('f'):
5986 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5987 		    == NULL) {
5988 			/* can't scroll any further; move cursor down */
5989 			if (s->selected < s->ndisplayed - 1)
5990 				s->selected += MIN(nscroll,
5991 				    s->ndisplayed - s->selected - 1);
5992 			break;
5993 		}
5994 		tree_scroll_down(s, nscroll);
5995 		break;
5996 	case KEY_ENTER:
5997 	case '\r':
5998 	case KEY_BACKSPACE:
5999 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
6000 			struct tog_parent_tree *parent;
6001 			/* user selected '..' */
6002 			if (s->tree == s->root)
6003 				break;
6004 			parent = TAILQ_FIRST(&s->parents);
6005 			TAILQ_REMOVE(&s->parents, parent,
6006 			    entry);
6007 			got_object_tree_close(s->tree);
6008 			s->tree = parent->tree;
6009 			s->first_displayed_entry =
6010 			    parent->first_displayed_entry;
6011 			s->selected_entry =
6012 			    parent->selected_entry;
6013 			s->selected = parent->selected;
6014 			free(parent);
6015 		} else if (S_ISDIR(got_tree_entry_get_mode(
6016 		    s->selected_entry))) {
6017 			struct got_tree_object *subtree;
6018 			err = got_object_open_as_tree(&subtree, s->repo,
6019 			    got_tree_entry_get_id(s->selected_entry));
6020 			if (err)
6021 				break;
6022 			err = tree_view_visit_subtree(s, subtree);
6023 			if (err) {
6024 				got_object_tree_close(subtree);
6025 				break;
6026 			}
6027 		} else if (S_ISREG(got_tree_entry_get_mode(
6028 		    s->selected_entry))) {
6029 			struct tog_view *blame_view;
6030 			int begin_x = view_is_parent_view(view) ?
6031 			    view_split_begin_x(view->begin_x) : 0;
6032 
6033 			err = blame_tree_entry(&blame_view, begin_x,
6034 			    s->selected_entry, &s->parents,
6035 			    s->commit_id, s->repo);
6036 			if (err)
6037 				break;
6038 			view->focussed = 0;
6039 			blame_view->focussed = 1;
6040 			if (view_is_parent_view(view)) {
6041 				err = view_close_child(view);
6042 				if (err)
6043 					return err;
6044 				err = view_set_child(view, blame_view);
6045 				if (err)
6046 					return err;
6047 				view->focus_child = 1;
6048 			} else
6049 				*new_view = blame_view;
6050 		}
6051 		break;
6052 	case KEY_RESIZE:
6053 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6054 			s->selected = view->nlines - 4;
6055 		break;
6056 	default:
6057 		break;
6058 	}
6059 
6060 	return err;
6061 }
6062 
6063 __dead static void
6064 usage_tree(void)
6065 {
6066 	endwin();
6067 	fprintf(stderr,
6068 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6069 	    getprogname());
6070 	exit(1);
6071 }
6072 
6073 static const struct got_error *
6074 cmd_tree(int argc, char *argv[])
6075 {
6076 	const struct got_error *error;
6077 	struct got_repository *repo = NULL;
6078 	struct got_worktree *worktree = NULL;
6079 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6080 	struct got_object_id *commit_id = NULL;
6081 	struct got_commit_object *commit = NULL;
6082 	const char *commit_id_arg = NULL;
6083 	char *label = NULL;
6084 	struct got_reference *ref = NULL;
6085 	const char *head_ref_name = NULL;
6086 	int ch;
6087 	struct tog_view *view;
6088 	int *pack_fds = NULL;
6089 
6090 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6091 		switch (ch) {
6092 		case 'c':
6093 			commit_id_arg = optarg;
6094 			break;
6095 		case 'r':
6096 			repo_path = realpath(optarg, NULL);
6097 			if (repo_path == NULL)
6098 				return got_error_from_errno2("realpath",
6099 				    optarg);
6100 			break;
6101 		default:
6102 			usage_tree();
6103 			/* NOTREACHED */
6104 		}
6105 	}
6106 
6107 	argc -= optind;
6108 	argv += optind;
6109 
6110 	if (argc > 1)
6111 		usage_tree();
6112 
6113 	error = got_repo_pack_fds_open(&pack_fds);
6114 	if (error != NULL)
6115 		goto done;
6116 
6117 	if (repo_path == NULL) {
6118 		cwd = getcwd(NULL, 0);
6119 		if (cwd == NULL)
6120 			return got_error_from_errno("getcwd");
6121 		error = got_worktree_open(&worktree, cwd);
6122 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6123 			goto done;
6124 		if (worktree)
6125 			repo_path =
6126 			    strdup(got_worktree_get_repo_path(worktree));
6127 		else
6128 			repo_path = strdup(cwd);
6129 		if (repo_path == NULL) {
6130 			error = got_error_from_errno("strdup");
6131 			goto done;
6132 		}
6133 	}
6134 
6135 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6136 	if (error != NULL)
6137 		goto done;
6138 
6139 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6140 	    repo, worktree);
6141 	if (error)
6142 		goto done;
6143 
6144 	init_curses();
6145 
6146 	error = apply_unveil(got_repo_get_path(repo), NULL);
6147 	if (error)
6148 		goto done;
6149 
6150 	error = tog_load_refs(repo, 0);
6151 	if (error)
6152 		goto done;
6153 
6154 	if (commit_id_arg == NULL) {
6155 		error = got_repo_match_object_id(&commit_id, &label,
6156 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6157 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6158 		if (error)
6159 			goto done;
6160 		head_ref_name = label;
6161 	} else {
6162 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6163 		if (error == NULL)
6164 			head_ref_name = got_ref_get_name(ref);
6165 		else if (error->code != GOT_ERR_NOT_REF)
6166 			goto done;
6167 		error = got_repo_match_object_id(&commit_id, NULL,
6168 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6169 		if (error)
6170 			goto done;
6171 	}
6172 
6173 	error = got_object_open_as_commit(&commit, repo, commit_id);
6174 	if (error)
6175 		goto done;
6176 
6177 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6178 	if (view == NULL) {
6179 		error = got_error_from_errno("view_open");
6180 		goto done;
6181 	}
6182 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6183 	if (error)
6184 		goto done;
6185 	if (!got_path_is_root_dir(in_repo_path)) {
6186 		error = tree_view_walk_path(&view->state.tree, commit,
6187 		    in_repo_path);
6188 		if (error)
6189 			goto done;
6190 	}
6191 
6192 	if (worktree) {
6193 		/* Release work tree lock. */
6194 		got_worktree_close(worktree);
6195 		worktree = NULL;
6196 	}
6197 	error = view_loop(view);
6198 done:
6199 	free(repo_path);
6200 	free(cwd);
6201 	free(commit_id);
6202 	free(label);
6203 	if (ref)
6204 		got_ref_close(ref);
6205 	if (repo) {
6206 		const struct got_error *close_err = got_repo_close(repo);
6207 		if (error == NULL)
6208 			error = close_err;
6209 	}
6210 	if (pack_fds) {
6211 		const struct got_error *pack_err =
6212 		    got_repo_pack_fds_close(pack_fds);
6213 		if (error == NULL)
6214 			error = pack_err;
6215 	}
6216 	tog_free_refs();
6217 	return error;
6218 }
6219 
6220 static const struct got_error *
6221 ref_view_load_refs(struct tog_ref_view_state *s)
6222 {
6223 	struct got_reflist_entry *sre;
6224 	struct tog_reflist_entry *re;
6225 
6226 	s->nrefs = 0;
6227 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6228 		if (strncmp(got_ref_get_name(sre->ref),
6229 		    "refs/got/", 9) == 0 &&
6230 		    strncmp(got_ref_get_name(sre->ref),
6231 		    "refs/got/backup/", 16) != 0)
6232 			continue;
6233 
6234 		re = malloc(sizeof(*re));
6235 		if (re == NULL)
6236 			return got_error_from_errno("malloc");
6237 
6238 		re->ref = got_ref_dup(sre->ref);
6239 		if (re->ref == NULL)
6240 			return got_error_from_errno("got_ref_dup");
6241 		re->idx = s->nrefs++;
6242 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6243 	}
6244 
6245 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6246 	return NULL;
6247 }
6248 
6249 void
6250 ref_view_free_refs(struct tog_ref_view_state *s)
6251 {
6252 	struct tog_reflist_entry *re;
6253 
6254 	while (!TAILQ_EMPTY(&s->refs)) {
6255 		re = TAILQ_FIRST(&s->refs);
6256 		TAILQ_REMOVE(&s->refs, re, entry);
6257 		got_ref_close(re->ref);
6258 		free(re);
6259 	}
6260 }
6261 
6262 static const struct got_error *
6263 open_ref_view(struct tog_view *view, struct got_repository *repo)
6264 {
6265 	const struct got_error *err = NULL;
6266 	struct tog_ref_view_state *s = &view->state.ref;
6267 
6268 	s->selected_entry = 0;
6269 	s->repo = repo;
6270 
6271 	TAILQ_INIT(&s->refs);
6272 	STAILQ_INIT(&s->colors);
6273 
6274 	err = ref_view_load_refs(s);
6275 	if (err)
6276 		return err;
6277 
6278 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6279 		err = add_color(&s->colors, "^refs/heads/",
6280 		    TOG_COLOR_REFS_HEADS,
6281 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6282 		if (err)
6283 			goto done;
6284 
6285 		err = add_color(&s->colors, "^refs/tags/",
6286 		    TOG_COLOR_REFS_TAGS,
6287 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6288 		if (err)
6289 			goto done;
6290 
6291 		err = add_color(&s->colors, "^refs/remotes/",
6292 		    TOG_COLOR_REFS_REMOTES,
6293 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6294 		if (err)
6295 			goto done;
6296 
6297 		err = add_color(&s->colors, "^refs/got/backup/",
6298 		    TOG_COLOR_REFS_BACKUP,
6299 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6300 		if (err)
6301 			goto done;
6302 	}
6303 
6304 	view->show = show_ref_view;
6305 	view->input = input_ref_view;
6306 	view->close = close_ref_view;
6307 	view->search_start = search_start_ref_view;
6308 	view->search_next = search_next_ref_view;
6309 done:
6310 	if (err)
6311 		free_colors(&s->colors);
6312 	return err;
6313 }
6314 
6315 static const struct got_error *
6316 close_ref_view(struct tog_view *view)
6317 {
6318 	struct tog_ref_view_state *s = &view->state.ref;
6319 
6320 	ref_view_free_refs(s);
6321 	free_colors(&s->colors);
6322 
6323 	return NULL;
6324 }
6325 
6326 static const struct got_error *
6327 resolve_reflist_entry(struct got_object_id **commit_id,
6328     struct tog_reflist_entry *re, struct got_repository *repo)
6329 {
6330 	const struct got_error *err = NULL;
6331 	struct got_object_id *obj_id;
6332 	struct got_tag_object *tag = NULL;
6333 	int obj_type;
6334 
6335 	*commit_id = NULL;
6336 
6337 	err = got_ref_resolve(&obj_id, repo, re->ref);
6338 	if (err)
6339 		return err;
6340 
6341 	err = got_object_get_type(&obj_type, repo, obj_id);
6342 	if (err)
6343 		goto done;
6344 
6345 	switch (obj_type) {
6346 	case GOT_OBJ_TYPE_COMMIT:
6347 		*commit_id = obj_id;
6348 		break;
6349 	case GOT_OBJ_TYPE_TAG:
6350 		err = got_object_open_as_tag(&tag, repo, obj_id);
6351 		if (err)
6352 			goto done;
6353 		free(obj_id);
6354 		err = got_object_get_type(&obj_type, repo,
6355 		    got_object_tag_get_object_id(tag));
6356 		if (err)
6357 			goto done;
6358 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6359 			err = got_error(GOT_ERR_OBJ_TYPE);
6360 			goto done;
6361 		}
6362 		*commit_id = got_object_id_dup(
6363 		    got_object_tag_get_object_id(tag));
6364 		if (*commit_id == NULL) {
6365 			err = got_error_from_errno("got_object_id_dup");
6366 			goto done;
6367 		}
6368 		break;
6369 	default:
6370 		err = got_error(GOT_ERR_OBJ_TYPE);
6371 		break;
6372 	}
6373 
6374 done:
6375 	if (tag)
6376 		got_object_tag_close(tag);
6377 	if (err) {
6378 		free(*commit_id);
6379 		*commit_id = NULL;
6380 	}
6381 	return err;
6382 }
6383 
6384 static const struct got_error *
6385 log_ref_entry(struct tog_view **new_view, int begin_x,
6386     struct tog_reflist_entry *re, struct got_repository *repo)
6387 {
6388 	struct tog_view *log_view;
6389 	const struct got_error *err = NULL;
6390 	struct got_object_id *commit_id = NULL;
6391 
6392 	*new_view = NULL;
6393 
6394 	err = resolve_reflist_entry(&commit_id, re, repo);
6395 	if (err) {
6396 		if (err->code != GOT_ERR_OBJ_TYPE)
6397 			return err;
6398 		else
6399 			return NULL;
6400 	}
6401 
6402 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6403 	if (log_view == NULL) {
6404 		err = got_error_from_errno("view_open");
6405 		goto done;
6406 	}
6407 
6408 	err = open_log_view(log_view, commit_id, repo,
6409 	    got_ref_get_name(re->ref), "", 0);
6410 done:
6411 	if (err)
6412 		view_close(log_view);
6413 	else
6414 		*new_view = log_view;
6415 	free(commit_id);
6416 	return err;
6417 }
6418 
6419 static void
6420 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6421 {
6422 	struct tog_reflist_entry *re;
6423 	int i = 0;
6424 
6425 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6426 		return;
6427 
6428 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6429 	while (i++ < maxscroll) {
6430 		if (re == NULL)
6431 			break;
6432 		s->first_displayed_entry = re;
6433 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6434 	}
6435 }
6436 
6437 static void
6438 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6439 {
6440 	struct tog_reflist_entry *next, *last;
6441 	int n = 0;
6442 
6443 	if (s->first_displayed_entry)
6444 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6445 	else
6446 		next = TAILQ_FIRST(&s->refs);
6447 
6448 	last = s->last_displayed_entry;
6449 	while (next && last && n++ < maxscroll) {
6450 		last = TAILQ_NEXT(last, entry);
6451 		if (last) {
6452 			s->first_displayed_entry = next;
6453 			next = TAILQ_NEXT(next, entry);
6454 		}
6455 	}
6456 }
6457 
6458 static const struct got_error *
6459 search_start_ref_view(struct tog_view *view)
6460 {
6461 	struct tog_ref_view_state *s = &view->state.ref;
6462 
6463 	s->matched_entry = NULL;
6464 	return NULL;
6465 }
6466 
6467 static int
6468 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6469 {
6470 	regmatch_t regmatch;
6471 
6472 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6473 	    0) == 0;
6474 }
6475 
6476 static const struct got_error *
6477 search_next_ref_view(struct tog_view *view)
6478 {
6479 	struct tog_ref_view_state *s = &view->state.ref;
6480 	struct tog_reflist_entry *re = NULL;
6481 
6482 	if (!view->searching) {
6483 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6484 		return NULL;
6485 	}
6486 
6487 	if (s->matched_entry) {
6488 		if (view->searching == TOG_SEARCH_FORWARD) {
6489 			if (s->selected_entry)
6490 				re = TAILQ_NEXT(s->selected_entry, entry);
6491 			else
6492 				re = TAILQ_PREV(s->selected_entry,
6493 				    tog_reflist_head, entry);
6494 		} else {
6495 			if (s->selected_entry == NULL)
6496 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6497 			else
6498 				re = TAILQ_PREV(s->selected_entry,
6499 				    tog_reflist_head, entry);
6500 		}
6501 	} else {
6502 		if (s->selected_entry)
6503 			re = s->selected_entry;
6504 		else if (view->searching == TOG_SEARCH_FORWARD)
6505 			re = TAILQ_FIRST(&s->refs);
6506 		else
6507 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6508 	}
6509 
6510 	while (1) {
6511 		if (re == NULL) {
6512 			if (s->matched_entry == NULL) {
6513 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6514 				return NULL;
6515 			}
6516 			if (view->searching == TOG_SEARCH_FORWARD)
6517 				re = TAILQ_FIRST(&s->refs);
6518 			else
6519 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6520 		}
6521 
6522 		if (match_reflist_entry(re, &view->regex)) {
6523 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6524 			s->matched_entry = re;
6525 			break;
6526 		}
6527 
6528 		if (view->searching == TOG_SEARCH_FORWARD)
6529 			re = TAILQ_NEXT(re, entry);
6530 		else
6531 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6532 	}
6533 
6534 	if (s->matched_entry) {
6535 		s->first_displayed_entry = s->matched_entry;
6536 		s->selected = 0;
6537 	}
6538 
6539 	return NULL;
6540 }
6541 
6542 static const struct got_error *
6543 show_ref_view(struct tog_view *view)
6544 {
6545 	const struct got_error *err = NULL;
6546 	struct tog_ref_view_state *s = &view->state.ref;
6547 	struct tog_reflist_entry *re;
6548 	char *line = NULL;
6549 	wchar_t *wline;
6550 	struct tog_color *tc;
6551 	int width, n;
6552 	int limit = view->nlines;
6553 
6554 	werase(view->window);
6555 
6556 	s->ndisplayed = 0;
6557 
6558 	if (limit == 0)
6559 		return NULL;
6560 
6561 	re = s->first_displayed_entry;
6562 
6563 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6564 	    s->nrefs) == -1)
6565 		return got_error_from_errno("asprintf");
6566 
6567 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6568 	if (err) {
6569 		free(line);
6570 		return err;
6571 	}
6572 	if (view_needs_focus_indication(view))
6573 		wstandout(view->window);
6574 	waddwstr(view->window, wline);
6575 	if (view_needs_focus_indication(view))
6576 		wstandend(view->window);
6577 	free(wline);
6578 	wline = NULL;
6579 	free(line);
6580 	line = NULL;
6581 	if (width < view->ncols - 1)
6582 		waddch(view->window, '\n');
6583 	if (--limit <= 0)
6584 		return NULL;
6585 
6586 	n = 0;
6587 	while (re && limit > 0) {
6588 		char *line = NULL;
6589 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6590 
6591 		if (s->show_date) {
6592 			struct got_commit_object *ci;
6593 			struct got_tag_object *tag;
6594 			struct got_object_id *id;
6595 			struct tm tm;
6596 			time_t t;
6597 
6598 			err = got_ref_resolve(&id, s->repo, re->ref);
6599 			if (err)
6600 				return err;
6601 			err = got_object_open_as_tag(&tag, s->repo, id);
6602 			if (err) {
6603 				if (err->code != GOT_ERR_OBJ_TYPE) {
6604 					free(id);
6605 					return err;
6606 				}
6607 				err = got_object_open_as_commit(&ci, s->repo,
6608 				    id);
6609 				if (err) {
6610 					free(id);
6611 					return err;
6612 				}
6613 				t = got_object_commit_get_committer_time(ci);
6614 				got_object_commit_close(ci);
6615 			} else {
6616 				t = got_object_tag_get_tagger_time(tag);
6617 				got_object_tag_close(tag);
6618 			}
6619 			free(id);
6620 			if (gmtime_r(&t, &tm) == NULL)
6621 				return got_error_from_errno("gmtime_r");
6622 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6623 				return got_error(GOT_ERR_NO_SPACE);
6624 		}
6625 		if (got_ref_is_symbolic(re->ref)) {
6626 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6627 			    ymd : "", got_ref_get_name(re->ref),
6628 			    got_ref_get_symref_target(re->ref)) == -1)
6629 				return got_error_from_errno("asprintf");
6630 		} else if (s->show_ids) {
6631 			struct got_object_id *id;
6632 			char *id_str;
6633 			err = got_ref_resolve(&id, s->repo, re->ref);
6634 			if (err)
6635 				return err;
6636 			err = got_object_id_str(&id_str, id);
6637 			if (err) {
6638 				free(id);
6639 				return err;
6640 			}
6641 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6642 			    got_ref_get_name(re->ref), id_str) == -1) {
6643 				err = got_error_from_errno("asprintf");
6644 				free(id);
6645 				free(id_str);
6646 				return err;
6647 			}
6648 			free(id);
6649 			free(id_str);
6650 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6651 		    got_ref_get_name(re->ref)) == -1)
6652 			return got_error_from_errno("asprintf");
6653 
6654 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6655 		    0, 0);
6656 		if (err) {
6657 			free(line);
6658 			return err;
6659 		}
6660 		if (n == s->selected) {
6661 			if (view->focussed)
6662 				wstandout(view->window);
6663 			s->selected_entry = re;
6664 		}
6665 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6666 		if (tc)
6667 			wattr_on(view->window,
6668 			    COLOR_PAIR(tc->colorpair), NULL);
6669 		waddwstr(view->window, wline);
6670 		if (tc)
6671 			wattr_off(view->window,
6672 			    COLOR_PAIR(tc->colorpair), NULL);
6673 		if (width < view->ncols - 1)
6674 			waddch(view->window, '\n');
6675 		if (n == s->selected && view->focussed)
6676 			wstandend(view->window);
6677 		free(line);
6678 		free(wline);
6679 		wline = NULL;
6680 		n++;
6681 		s->ndisplayed++;
6682 		s->last_displayed_entry = re;
6683 
6684 		limit--;
6685 		re = TAILQ_NEXT(re, entry);
6686 	}
6687 
6688 	view_vborder(view);
6689 	return err;
6690 }
6691 
6692 static const struct got_error *
6693 browse_ref_tree(struct tog_view **new_view, int begin_x,
6694     struct tog_reflist_entry *re, struct got_repository *repo)
6695 {
6696 	const struct got_error *err = NULL;
6697 	struct got_object_id *commit_id = NULL;
6698 	struct tog_view *tree_view;
6699 
6700 	*new_view = NULL;
6701 
6702 	err = resolve_reflist_entry(&commit_id, re, repo);
6703 	if (err) {
6704 		if (err->code != GOT_ERR_OBJ_TYPE)
6705 			return err;
6706 		else
6707 			return NULL;
6708 	}
6709 
6710 
6711 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6712 	if (tree_view == NULL) {
6713 		err = got_error_from_errno("view_open");
6714 		goto done;
6715 	}
6716 
6717 	err = open_tree_view(tree_view, commit_id,
6718 	    got_ref_get_name(re->ref), repo);
6719 	if (err)
6720 		goto done;
6721 
6722 	*new_view = tree_view;
6723 done:
6724 	free(commit_id);
6725 	return err;
6726 }
6727 static const struct got_error *
6728 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6729 {
6730 	const struct got_error *err = NULL;
6731 	struct tog_ref_view_state *s = &view->state.ref;
6732 	struct tog_view *log_view, *tree_view;
6733 	struct tog_reflist_entry *re;
6734 	int begin_x = 0, n, nscroll = view->nlines - 1;
6735 
6736 	switch (ch) {
6737 	case 'i':
6738 		s->show_ids = !s->show_ids;
6739 		break;
6740 	case 'm':
6741 		s->show_date = !s->show_date;
6742 		break;
6743 	case 'o':
6744 		s->sort_by_date = !s->sort_by_date;
6745 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6746 		    got_ref_cmp_by_commit_timestamp_descending :
6747 		    tog_ref_cmp_by_name, s->repo);
6748 		if (err)
6749 			break;
6750 		got_reflist_object_id_map_free(tog_refs_idmap);
6751 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6752 		    &tog_refs, s->repo);
6753 		if (err)
6754 			break;
6755 		ref_view_free_refs(s);
6756 		err = ref_view_load_refs(s);
6757 		break;
6758 	case KEY_ENTER:
6759 	case '\r':
6760 		if (!s->selected_entry)
6761 			break;
6762 		if (view_is_parent_view(view))
6763 			begin_x = view_split_begin_x(view->begin_x);
6764 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6765 		    s->repo);
6766 		view->focussed = 0;
6767 		log_view->focussed = 1;
6768 		if (view_is_parent_view(view)) {
6769 			err = view_close_child(view);
6770 			if (err)
6771 				return err;
6772 			err = view_set_child(view, log_view);
6773 			if (err)
6774 				return err;
6775 			view->focus_child = 1;
6776 		} else
6777 			*new_view = log_view;
6778 		break;
6779 	case 't':
6780 		if (!s->selected_entry)
6781 			break;
6782 		if (view_is_parent_view(view))
6783 			begin_x = view_split_begin_x(view->begin_x);
6784 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6785 		    s->repo);
6786 		if (err || tree_view == NULL)
6787 			break;
6788 		view->focussed = 0;
6789 		tree_view->focussed = 1;
6790 		if (view_is_parent_view(view)) {
6791 			err = view_close_child(view);
6792 			if (err)
6793 				return err;
6794 			err = view_set_child(view, tree_view);
6795 			if (err)
6796 				return err;
6797 			view->focus_child = 1;
6798 		} else
6799 			*new_view = tree_view;
6800 		break;
6801 	case 'g':
6802 	case KEY_HOME:
6803 		s->selected = 0;
6804 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6805 		break;
6806 	case 'G':
6807 	case KEY_END:
6808 		s->selected = 0;
6809 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6810 		for (n = 0; n < view->nlines - 1; n++) {
6811 			if (re == NULL)
6812 				break;
6813 			s->first_displayed_entry = re;
6814 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6815 		}
6816 		if (n > 0)
6817 			s->selected = n - 1;
6818 		break;
6819 	case 'k':
6820 	case KEY_UP:
6821 	case CTRL('p'):
6822 		if (s->selected > 0) {
6823 			s->selected--;
6824 			break;
6825 		}
6826 		ref_scroll_up(s, 1);
6827 		break;
6828 	case CTRL('u'):
6829 	case 'u':
6830 		nscroll /= 2;
6831 		/* FALL THROUGH */
6832 	case KEY_PPAGE:
6833 	case CTRL('b'):
6834 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6835 			s->selected -= MIN(nscroll, s->selected);
6836 		ref_scroll_up(s, MAX(0, nscroll));
6837 		break;
6838 	case 'j':
6839 	case KEY_DOWN:
6840 	case CTRL('n'):
6841 		if (s->selected < s->ndisplayed - 1) {
6842 			s->selected++;
6843 			break;
6844 		}
6845 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6846 			/* can't scroll any further */
6847 			break;
6848 		ref_scroll_down(s, 1);
6849 		break;
6850 	case CTRL('d'):
6851 	case 'd':
6852 		nscroll /= 2;
6853 		/* FALL THROUGH */
6854 	case KEY_NPAGE:
6855 	case CTRL('f'):
6856 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6857 			/* can't scroll any further; move cursor down */
6858 			if (s->selected < s->ndisplayed - 1)
6859 				s->selected += MIN(nscroll,
6860 				    s->ndisplayed - s->selected - 1);
6861 			break;
6862 		}
6863 		ref_scroll_down(s, nscroll);
6864 		break;
6865 	case CTRL('l'):
6866 		tog_free_refs();
6867 		err = tog_load_refs(s->repo, s->sort_by_date);
6868 		if (err)
6869 			break;
6870 		ref_view_free_refs(s);
6871 		err = ref_view_load_refs(s);
6872 		break;
6873 	case KEY_RESIZE:
6874 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6875 			s->selected = view->nlines - 2;
6876 		break;
6877 	default:
6878 		break;
6879 	}
6880 
6881 	return err;
6882 }
6883 
6884 __dead static void
6885 usage_ref(void)
6886 {
6887 	endwin();
6888 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6889 	    getprogname());
6890 	exit(1);
6891 }
6892 
6893 static const struct got_error *
6894 cmd_ref(int argc, char *argv[])
6895 {
6896 	const struct got_error *error;
6897 	struct got_repository *repo = NULL;
6898 	struct got_worktree *worktree = NULL;
6899 	char *cwd = NULL, *repo_path = NULL;
6900 	int ch;
6901 	struct tog_view *view;
6902 	int *pack_fds = NULL;
6903 
6904 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6905 		switch (ch) {
6906 		case 'r':
6907 			repo_path = realpath(optarg, NULL);
6908 			if (repo_path == NULL)
6909 				return got_error_from_errno2("realpath",
6910 				    optarg);
6911 			break;
6912 		default:
6913 			usage_ref();
6914 			/* NOTREACHED */
6915 		}
6916 	}
6917 
6918 	argc -= optind;
6919 	argv += optind;
6920 
6921 	if (argc > 1)
6922 		usage_ref();
6923 
6924 	error = got_repo_pack_fds_open(&pack_fds);
6925 	if (error != NULL)
6926 		goto done;
6927 
6928 	if (repo_path == NULL) {
6929 		cwd = getcwd(NULL, 0);
6930 		if (cwd == NULL)
6931 			return got_error_from_errno("getcwd");
6932 		error = got_worktree_open(&worktree, cwd);
6933 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6934 			goto done;
6935 		if (worktree)
6936 			repo_path =
6937 			    strdup(got_worktree_get_repo_path(worktree));
6938 		else
6939 			repo_path = strdup(cwd);
6940 		if (repo_path == NULL) {
6941 			error = got_error_from_errno("strdup");
6942 			goto done;
6943 		}
6944 	}
6945 
6946 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6947 	if (error != NULL)
6948 		goto done;
6949 
6950 	init_curses();
6951 
6952 	error = apply_unveil(got_repo_get_path(repo), NULL);
6953 	if (error)
6954 		goto done;
6955 
6956 	error = tog_load_refs(repo, 0);
6957 	if (error)
6958 		goto done;
6959 
6960 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6961 	if (view == NULL) {
6962 		error = got_error_from_errno("view_open");
6963 		goto done;
6964 	}
6965 
6966 	error = open_ref_view(view, repo);
6967 	if (error)
6968 		goto done;
6969 
6970 	if (worktree) {
6971 		/* Release work tree lock. */
6972 		got_worktree_close(worktree);
6973 		worktree = NULL;
6974 	}
6975 	error = view_loop(view);
6976 done:
6977 	free(repo_path);
6978 	free(cwd);
6979 	if (repo) {
6980 		const struct got_error *close_err = got_repo_close(repo);
6981 		if (close_err)
6982 			error = close_err;
6983 	}
6984 	if (pack_fds) {
6985 		const struct got_error *pack_err =
6986 		    got_repo_pack_fds_close(pack_fds);
6987 		if (error == NULL)
6988 			error = pack_err;
6989 	}
6990 	tog_free_refs();
6991 	return error;
6992 }
6993 
6994 static void
6995 list_commands(FILE *fp)
6996 {
6997 	size_t i;
6998 
6999 	fprintf(fp, "commands:");
7000 	for (i = 0; i < nitems(tog_commands); i++) {
7001 		const struct tog_cmd *cmd = &tog_commands[i];
7002 		fprintf(fp, " %s", cmd->name);
7003 	}
7004 	fputc('\n', fp);
7005 }
7006 
7007 __dead static void
7008 usage(int hflag, int status)
7009 {
7010 	FILE *fp = (status == 0) ? stdout : stderr;
7011 
7012 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7013 	    getprogname());
7014 	if (hflag) {
7015 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7016 		list_commands(fp);
7017 	}
7018 	exit(status);
7019 }
7020 
7021 static char **
7022 make_argv(int argc, ...)
7023 {
7024 	va_list ap;
7025 	char **argv;
7026 	int i;
7027 
7028 	va_start(ap, argc);
7029 
7030 	argv = calloc(argc, sizeof(char *));
7031 	if (argv == NULL)
7032 		err(1, "calloc");
7033 	for (i = 0; i < argc; i++) {
7034 		argv[i] = strdup(va_arg(ap, char *));
7035 		if (argv[i] == NULL)
7036 			err(1, "strdup");
7037 	}
7038 
7039 	va_end(ap);
7040 	return argv;
7041 }
7042 
7043 /*
7044  * Try to convert 'tog path' into a 'tog log path' command.
7045  * The user could simply have mistyped the command rather than knowingly
7046  * provided a path. So check whether argv[0] can in fact be resolved
7047  * to a path in the HEAD commit and print a special error if not.
7048  * This hack is for mpi@ <3
7049  */
7050 static const struct got_error *
7051 tog_log_with_path(int argc, char *argv[])
7052 {
7053 	const struct got_error *error = NULL, *close_err;
7054 	const struct tog_cmd *cmd = NULL;
7055 	struct got_repository *repo = NULL;
7056 	struct got_worktree *worktree = NULL;
7057 	struct got_object_id *commit_id = NULL, *id = NULL;
7058 	struct got_commit_object *commit = NULL;
7059 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7060 	char *commit_id_str = NULL, **cmd_argv = NULL;
7061 	int *pack_fds = NULL;
7062 
7063 	cwd = getcwd(NULL, 0);
7064 	if (cwd == NULL)
7065 		return got_error_from_errno("getcwd");
7066 
7067 	error = got_repo_pack_fds_open(&pack_fds);
7068 	if (error != NULL)
7069 		goto done;
7070 
7071 	error = got_worktree_open(&worktree, cwd);
7072 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7073 		goto done;
7074 
7075 	if (worktree)
7076 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7077 	else
7078 		repo_path = strdup(cwd);
7079 	if (repo_path == NULL) {
7080 		error = got_error_from_errno("strdup");
7081 		goto done;
7082 	}
7083 
7084 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7085 	if (error != NULL)
7086 		goto done;
7087 
7088 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7089 	    repo, worktree);
7090 	if (error)
7091 		goto done;
7092 
7093 	error = tog_load_refs(repo, 0);
7094 	if (error)
7095 		goto done;
7096 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7097 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7098 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7099 	if (error)
7100 		goto done;
7101 
7102 	if (worktree) {
7103 		got_worktree_close(worktree);
7104 		worktree = NULL;
7105 	}
7106 
7107 	error = got_object_open_as_commit(&commit, repo, commit_id);
7108 	if (error)
7109 		goto done;
7110 
7111 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7112 	if (error) {
7113 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7114 			goto done;
7115 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7116 		    getprogname(), argv[0]);
7117 		usage(1, 1);
7118 		/* not reached */
7119 	}
7120 
7121 	close_err = got_repo_close(repo);
7122 	if (error == NULL)
7123 		error = close_err;
7124 	repo = NULL;
7125 
7126 	error = got_object_id_str(&commit_id_str, commit_id);
7127 	if (error)
7128 		goto done;
7129 
7130 	cmd = &tog_commands[0]; /* log */
7131 	argc = 4;
7132 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7133 	error = cmd->cmd_main(argc, cmd_argv);
7134 done:
7135 	if (repo) {
7136 		close_err = got_repo_close(repo);
7137 		if (error == NULL)
7138 			error = close_err;
7139 	}
7140 	if (commit)
7141 		got_object_commit_close(commit);
7142 	if (worktree)
7143 		got_worktree_close(worktree);
7144 	if (pack_fds) {
7145 		const struct got_error *pack_err =
7146 		    got_repo_pack_fds_close(pack_fds);
7147 		if (error == NULL)
7148 			error = pack_err;
7149 	}
7150 	free(id);
7151 	free(commit_id_str);
7152 	free(commit_id);
7153 	free(cwd);
7154 	free(repo_path);
7155 	free(in_repo_path);
7156 	if (cmd_argv) {
7157 		int i;
7158 		for (i = 0; i < argc; i++)
7159 			free(cmd_argv[i]);
7160 		free(cmd_argv);
7161 	}
7162 	tog_free_refs();
7163 	return error;
7164 }
7165 
7166 int
7167 main(int argc, char *argv[])
7168 {
7169 	const struct got_error *error = NULL;
7170 	const struct tog_cmd *cmd = NULL;
7171 	int ch, hflag = 0, Vflag = 0;
7172 	char **cmd_argv = NULL;
7173 	static const struct option longopts[] = {
7174 	    { "version", no_argument, NULL, 'V' },
7175 	    { NULL, 0, NULL, 0}
7176 	};
7177 
7178 	setlocale(LC_CTYPE, "");
7179 
7180 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7181 		switch (ch) {
7182 		case 'h':
7183 			hflag = 1;
7184 			break;
7185 		case 'V':
7186 			Vflag = 1;
7187 			break;
7188 		default:
7189 			usage(hflag, 1);
7190 			/* NOTREACHED */
7191 		}
7192 	}
7193 
7194 	argc -= optind;
7195 	argv += optind;
7196 	optind = 1;
7197 	optreset = 1;
7198 
7199 	if (Vflag) {
7200 		got_version_print_str();
7201 		return 0;
7202 	}
7203 
7204 #ifndef PROFILE
7205 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7206 	    NULL) == -1)
7207 		err(1, "pledge");
7208 #endif
7209 
7210 	if (argc == 0) {
7211 		if (hflag)
7212 			usage(hflag, 0);
7213 		/* Build an argument vector which runs a default command. */
7214 		cmd = &tog_commands[0];
7215 		argc = 1;
7216 		cmd_argv = make_argv(argc, cmd->name);
7217 	} else {
7218 		size_t i;
7219 
7220 		/* Did the user specify a command? */
7221 		for (i = 0; i < nitems(tog_commands); i++) {
7222 			if (strncmp(tog_commands[i].name, argv[0],
7223 			    strlen(argv[0])) == 0) {
7224 				cmd = &tog_commands[i];
7225 				break;
7226 			}
7227 		}
7228 	}
7229 
7230 	if (cmd == NULL) {
7231 		if (argc != 1)
7232 			usage(0, 1);
7233 		/* No command specified; try log with a path */
7234 		error = tog_log_with_path(argc, argv);
7235 	} else {
7236 		if (hflag)
7237 			cmd->cmd_usage();
7238 		else
7239 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7240 	}
7241 
7242 	endwin();
7243 	putchar('\n');
7244 	if (cmd_argv) {
7245 		int i;
7246 		for (i = 0; i < argc; i++)
7247 			free(cmd_argv[i]);
7248 		free(cmd_argv);
7249 	}
7250 
7251 	if (error && error->code != GOT_ERR_CANCELLED)
7252 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7253 	return 0;
7254 }