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 		break;
2813 	case 'r':
2814 		if (view_is_parent_view(view))
2815 			begin_x = view_split_begin_x(view->begin_x);
2816 		ref_view = view_open(view->nlines, view->ncols,
2817 		    view->begin_y, begin_x, TOG_VIEW_REF);
2818 		if (ref_view == NULL)
2819 			return got_error_from_errno("view_open");
2820 		err = open_ref_view(ref_view, s->repo);
2821 		if (err) {
2822 			view_close(ref_view);
2823 			return err;
2824 		}
2825 		view->focussed = 0;
2826 		ref_view->focussed = 1;
2827 		if (view_is_parent_view(view)) {
2828 			err = view_close_child(view);
2829 			if (err)
2830 				return err;
2831 			err = view_set_child(view, ref_view);
2832 			if (err)
2833 				return err;
2834 			view->focus_child = 1;
2835 		} else
2836 			*new_view = ref_view;
2837 		break;
2838 	default:
2839 		break;
2840 	}
2841 
2842 	return err;
2843 }
2844 
2845 static const struct got_error *
2846 apply_unveil(const char *repo_path, const char *worktree_path)
2847 {
2848 	const struct got_error *error;
2849 
2850 #ifdef PROFILE
2851 	if (unveil("gmon.out", "rwc") != 0)
2852 		return got_error_from_errno2("unveil", "gmon.out");
2853 #endif
2854 	if (repo_path && unveil(repo_path, "r") != 0)
2855 		return got_error_from_errno2("unveil", repo_path);
2856 
2857 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2858 		return got_error_from_errno2("unveil", worktree_path);
2859 
2860 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2861 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2862 
2863 	error = got_privsep_unveil_exec_helpers();
2864 	if (error != NULL)
2865 		return error;
2866 
2867 	if (unveil(NULL, NULL) != 0)
2868 		return got_error_from_errno("unveil");
2869 
2870 	return NULL;
2871 }
2872 
2873 static void
2874 init_curses(void)
2875 {
2876 	/*
2877 	 * Override default signal handlers before starting ncurses.
2878 	 * This should prevent ncurses from installing its own
2879 	 * broken cleanup() signal handler.
2880 	 */
2881 	signal(SIGWINCH, tog_sigwinch);
2882 	signal(SIGPIPE, tog_sigpipe);
2883 	signal(SIGCONT, tog_sigcont);
2884 	signal(SIGINT, tog_sigint);
2885 	signal(SIGTERM, tog_sigterm);
2886 
2887 	initscr();
2888 	cbreak();
2889 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2890 	noecho();
2891 	nonl();
2892 	intrflush(stdscr, FALSE);
2893 	keypad(stdscr, TRUE);
2894 	curs_set(0);
2895 	if (getenv("TOG_COLORS") != NULL) {
2896 		start_color();
2897 		use_default_colors();
2898 	}
2899 }
2900 
2901 static const struct got_error *
2902 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2903     struct got_repository *repo, struct got_worktree *worktree)
2904 {
2905 	const struct got_error *err = NULL;
2906 
2907 	if (argc == 0) {
2908 		*in_repo_path = strdup("/");
2909 		if (*in_repo_path == NULL)
2910 			return got_error_from_errno("strdup");
2911 		return NULL;
2912 	}
2913 
2914 	if (worktree) {
2915 		const char *prefix = got_worktree_get_path_prefix(worktree);
2916 		char *p;
2917 
2918 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2919 		if (err)
2920 			return err;
2921 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2922 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2923 		    p) == -1) {
2924 			err = got_error_from_errno("asprintf");
2925 			*in_repo_path = NULL;
2926 		}
2927 		free(p);
2928 	} else
2929 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2930 
2931 	return err;
2932 }
2933 
2934 static const struct got_error *
2935 cmd_log(int argc, char *argv[])
2936 {
2937 	const struct got_error *error;
2938 	struct got_repository *repo = NULL;
2939 	struct got_worktree *worktree = NULL;
2940 	struct got_object_id *start_id = NULL;
2941 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2942 	char *start_commit = NULL, *label = NULL;
2943 	struct got_reference *ref = NULL;
2944 	const char *head_ref_name = NULL;
2945 	int ch, log_branches = 0;
2946 	struct tog_view *view;
2947 	int *pack_fds = NULL;
2948 
2949 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2950 		switch (ch) {
2951 		case 'b':
2952 			log_branches = 1;
2953 			break;
2954 		case 'c':
2955 			start_commit = optarg;
2956 			break;
2957 		case 'r':
2958 			repo_path = realpath(optarg, NULL);
2959 			if (repo_path == NULL)
2960 				return got_error_from_errno2("realpath",
2961 				    optarg);
2962 			break;
2963 		default:
2964 			usage_log();
2965 			/* NOTREACHED */
2966 		}
2967 	}
2968 
2969 	argc -= optind;
2970 	argv += optind;
2971 
2972 	if (argc > 1)
2973 		usage_log();
2974 
2975 	error = got_repo_pack_fds_open(&pack_fds);
2976 	if (error != NULL)
2977 		goto done;
2978 
2979 	if (repo_path == NULL) {
2980 		cwd = getcwd(NULL, 0);
2981 		if (cwd == NULL)
2982 			return got_error_from_errno("getcwd");
2983 		error = got_worktree_open(&worktree, cwd);
2984 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
2985 			goto done;
2986 		if (worktree)
2987 			repo_path =
2988 			    strdup(got_worktree_get_repo_path(worktree));
2989 		else
2990 			repo_path = strdup(cwd);
2991 		if (repo_path == NULL) {
2992 			error = got_error_from_errno("strdup");
2993 			goto done;
2994 		}
2995 	}
2996 
2997 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
2998 	if (error != NULL)
2999 		goto done;
3000 
3001 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3002 	    repo, worktree);
3003 	if (error)
3004 		goto done;
3005 
3006 	init_curses();
3007 
3008 	error = apply_unveil(got_repo_get_path(repo),
3009 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3010 	if (error)
3011 		goto done;
3012 
3013 	/* already loaded by tog_log_with_path()? */
3014 	if (TAILQ_EMPTY(&tog_refs)) {
3015 		error = tog_load_refs(repo, 0);
3016 		if (error)
3017 			goto done;
3018 	}
3019 
3020 	if (start_commit == NULL) {
3021 		error = got_repo_match_object_id(&start_id, &label,
3022 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3023 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3024 		if (error)
3025 			goto done;
3026 		head_ref_name = label;
3027 	} else {
3028 		error = got_ref_open(&ref, repo, start_commit, 0);
3029 		if (error == NULL)
3030 			head_ref_name = got_ref_get_name(ref);
3031 		else if (error->code != GOT_ERR_NOT_REF)
3032 			goto done;
3033 		error = got_repo_match_object_id(&start_id, NULL,
3034 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3035 		if (error)
3036 			goto done;
3037 	}
3038 
3039 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3040 	if (view == NULL) {
3041 		error = got_error_from_errno("view_open");
3042 		goto done;
3043 	}
3044 	error = open_log_view(view, start_id, repo, head_ref_name,
3045 	    in_repo_path, log_branches);
3046 	if (error)
3047 		goto done;
3048 	if (worktree) {
3049 		/* Release work tree lock. */
3050 		got_worktree_close(worktree);
3051 		worktree = NULL;
3052 	}
3053 	error = view_loop(view);
3054 done:
3055 	free(in_repo_path);
3056 	free(repo_path);
3057 	free(cwd);
3058 	free(start_id);
3059 	free(label);
3060 	if (ref)
3061 		got_ref_close(ref);
3062 	if (repo) {
3063 		const struct got_error *close_err = got_repo_close(repo);
3064 		if (error == NULL)
3065 			error = close_err;
3066 	}
3067 	if (worktree)
3068 		got_worktree_close(worktree);
3069 	if (pack_fds) {
3070 		const struct got_error *pack_err =
3071 		    got_repo_pack_fds_close(pack_fds);
3072 		if (error == NULL)
3073 			error = pack_err;
3074 	}
3075 	tog_free_refs();
3076 	return error;
3077 }
3078 
3079 __dead static void
3080 usage_diff(void)
3081 {
3082 	endwin();
3083 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3084 	    "[-w] object1 object2\n", getprogname());
3085 	exit(1);
3086 }
3087 
3088 static int
3089 match_line(const char *line, regex_t *regex, size_t nmatch,
3090     regmatch_t *regmatch)
3091 {
3092 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3093 }
3094 
3095 struct tog_color *
3096 match_color(struct tog_colors *colors, const char *line)
3097 {
3098 	struct tog_color *tc = NULL;
3099 
3100 	STAILQ_FOREACH(tc, colors, entry) {
3101 		if (match_line(line, &tc->regex, 0, NULL))
3102 			return tc;
3103 	}
3104 
3105 	return NULL;
3106 }
3107 
3108 static const struct got_error *
3109 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3110     WINDOW *window, int skipcol, regmatch_t *regmatch)
3111 {
3112 	const struct got_error *err = NULL;
3113 	char *exstr = NULL;
3114 	wchar_t *wline = NULL;
3115 	int rme, rms, n, width, scrollx;
3116 	int width0 = 0, width1 = 0, width2 = 0;
3117 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3118 
3119 	*wtotal = 0;
3120 
3121 	rms = regmatch->rm_so;
3122 	rme = regmatch->rm_eo;
3123 
3124 	err = expand_tab(&exstr, line);
3125 	if (err)
3126 		return err;
3127 
3128 	/* Split the line into 3 segments, according to match offsets. */
3129 	seg0 = strndup(exstr, rms);
3130 	if (seg0 == NULL) {
3131 		err = got_error_from_errno("strndup");
3132 		goto done;
3133 	}
3134 	seg1 = strndup(exstr + rms, rme - rms);
3135 	if (seg1 == NULL) {
3136 		err = got_error_from_errno("strndup");
3137 		goto done;
3138 	}
3139 	seg2 = strdup(exstr + rme);
3140 	if (seg2 == NULL) {
3141 		err = got_error_from_errno("strndup");
3142 		goto done;
3143 	}
3144 
3145 	/* draw up to matched token if we haven't scrolled past it */
3146 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3147 	    col_tab_align, 1);
3148 	if (err)
3149 		goto done;
3150 	n = MAX(width0 - skipcol, 0);
3151 	if (n) {
3152 		free(wline);
3153 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3154 		    wlimit, col_tab_align, 1);
3155 		if (err)
3156 			goto done;
3157 		waddwstr(window, &wline[scrollx]);
3158 		wlimit -= width;
3159 		*wtotal += width;
3160 	}
3161 
3162 	if (wlimit > 0) {
3163 		int i = 0, w = 0;
3164 		size_t wlen;
3165 
3166 		free(wline);
3167 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3168 		    col_tab_align, 1);
3169 		if (err)
3170 			goto done;
3171 		wlen = wcslen(wline);
3172 		while (i < wlen) {
3173 			width = wcwidth(wline[i]);
3174 			if (width == -1) {
3175 				/* should not happen, tabs are expanded */
3176 				err = got_error(GOT_ERR_RANGE);
3177 				goto done;
3178 			}
3179 			if (width0 + w + width > skipcol)
3180 				break;
3181 			w += width; 
3182 			i++;
3183 		}
3184 		/* draw (visible part of) matched token (if scrolled into it) */
3185 		if (width1 - w > 0) {
3186 			wattron(window, A_STANDOUT);
3187 			waddwstr(window, &wline[i]);
3188 			wattroff(window, A_STANDOUT);
3189 			wlimit -= (width1 - w);
3190 			*wtotal += (width1 - w);
3191 		}
3192 	}
3193 
3194 	if (wlimit > 0) {  /* draw rest of line */
3195 		free(wline);
3196 		if (skipcol > width0 + width1) {
3197 			err = format_line(&wline, &width2, &scrollx, seg2,
3198 			    skipcol - (width0 + width1), wlimit,
3199 			    col_tab_align, 1);
3200 			if (err)
3201 				goto done;
3202 			waddwstr(window, &wline[scrollx]);
3203 		} else {
3204 			err = format_line(&wline, &width2, NULL, seg2, 0,
3205 			    wlimit, col_tab_align, 1);
3206 			if (err)
3207 				goto done;
3208 			waddwstr(window, wline);
3209 		}
3210 		*wtotal += width2;
3211 	}
3212 done:
3213 	free(wline);
3214 	free(exstr);
3215 	free(seg0);
3216 	free(seg1);
3217 	free(seg2);
3218 	return err;
3219 }
3220 
3221 static const struct got_error *
3222 draw_file(struct tog_view *view, const char *header)
3223 {
3224 	struct tog_diff_view_state *s = &view->state.diff;
3225 	regmatch_t *regmatch = &view->regmatch;
3226 	const struct got_error *err;
3227 	int nprinted = 0;
3228 	char *line;
3229 	size_t linesize = 0;
3230 	ssize_t linelen;
3231 	struct tog_color *tc;
3232 	wchar_t *wline;
3233 	int width;
3234 	int max_lines = view->nlines;
3235 	int nlines = s->nlines;
3236 	off_t line_offset;
3237 
3238 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3239 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3240 		return got_error_from_errno("fseek");
3241 
3242 	werase(view->window);
3243 
3244 	if (header) {
3245 		if (asprintf(&line, "[%d/%d] %s",
3246 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3247 		    header) == -1)
3248 			return got_error_from_errno("asprintf");
3249 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3250 		    0, 0);
3251 		free(line);
3252 		if (err)
3253 			return err;
3254 
3255 		if (view_needs_focus_indication(view))
3256 			wstandout(view->window);
3257 		waddwstr(view->window, wline);
3258 		free(wline);
3259 		wline = NULL;
3260 		if (view_needs_focus_indication(view))
3261 			wstandend(view->window);
3262 		if (width <= view->ncols - 1)
3263 			waddch(view->window, '\n');
3264 
3265 		if (max_lines <= 1)
3266 			return NULL;
3267 		max_lines--;
3268 	}
3269 
3270 	s->eof = 0;
3271 	view->maxx = 0;
3272 	line = NULL;
3273 	while (max_lines > 0 && nprinted < max_lines) {
3274 		linelen = getline(&line, &linesize, s->f);
3275 		if (linelen == -1) {
3276 			if (feof(s->f)) {
3277 				s->eof = 1;
3278 				break;
3279 			}
3280 			free(line);
3281 			return got_ferror(s->f, GOT_ERR_IO);
3282 		}
3283 
3284 		/* Set view->maxx based on full line length. */
3285 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3286 		    view->x ? 1 : 0);
3287 		if (err) {
3288 			free(line);
3289 			return err;
3290 		}
3291 		view->maxx = MAX(view->maxx, width);
3292 		free(wline);
3293 		wline = NULL;
3294 
3295 		tc = match_color(&s->colors, line);
3296 		if (tc)
3297 			wattr_on(view->window,
3298 			    COLOR_PAIR(tc->colorpair), NULL);
3299 		if (s->first_displayed_line + nprinted == s->matched_line &&
3300 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3301 			err = add_matched_line(&width, line, view->ncols, 0,
3302 			    view->window, view->x, regmatch);
3303 			if (err) {
3304 				free(line);
3305 				return err;
3306 			}
3307 		} else {
3308 			int skip;
3309 			err = format_line(&wline, &width, &skip, line,
3310 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3311 			if (err) {
3312 				free(line);
3313 				return err;
3314 			}
3315 			waddwstr(view->window, &wline[skip]);
3316 			free(wline);
3317 			wline = NULL;
3318 		}
3319 		if (tc)
3320 			wattr_off(view->window,
3321 			    COLOR_PAIR(tc->colorpair), NULL);
3322 		if (width <= view->ncols - 1)
3323 			waddch(view->window, '\n');
3324 		nprinted++;
3325 	}
3326 	free(line);
3327 	if (nprinted >= 1)
3328 		s->last_displayed_line = s->first_displayed_line +
3329 		    (nprinted - 1);
3330 	else
3331 		s->last_displayed_line = s->first_displayed_line;
3332 
3333 	view_vborder(view);
3334 
3335 	if (s->eof) {
3336 		while (nprinted < view->nlines) {
3337 			waddch(view->window, '\n');
3338 			nprinted++;
3339 		}
3340 
3341 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
3342 		    view->ncols, 0, 0);
3343 		if (err) {
3344 			return err;
3345 		}
3346 
3347 		wstandout(view->window);
3348 		waddwstr(view->window, wline);
3349 		free(wline);
3350 		wline = NULL;
3351 		wstandend(view->window);
3352 	}
3353 
3354 	return NULL;
3355 }
3356 
3357 static char *
3358 get_datestr(time_t *time, char *datebuf)
3359 {
3360 	struct tm mytm, *tm;
3361 	char *p, *s;
3362 
3363 	tm = gmtime_r(time, &mytm);
3364 	if (tm == NULL)
3365 		return NULL;
3366 	s = asctime_r(tm, datebuf);
3367 	if (s == NULL)
3368 		return NULL;
3369 	p = strchr(s, '\n');
3370 	if (p)
3371 		*p = '\0';
3372 	return s;
3373 }
3374 
3375 static const struct got_error *
3376 get_changed_paths(struct got_pathlist_head *paths,
3377     struct got_commit_object *commit, struct got_repository *repo)
3378 {
3379 	const struct got_error *err = NULL;
3380 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3381 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3382 	struct got_object_qid *qid;
3383 
3384 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3385 	if (qid != NULL) {
3386 		struct got_commit_object *pcommit;
3387 		err = got_object_open_as_commit(&pcommit, repo,
3388 		    &qid->id);
3389 		if (err)
3390 			return err;
3391 
3392 		tree_id1 = got_object_id_dup(
3393 		    got_object_commit_get_tree_id(pcommit));
3394 		if (tree_id1 == NULL) {
3395 			got_object_commit_close(pcommit);
3396 			return got_error_from_errno("got_object_id_dup");
3397 		}
3398 		got_object_commit_close(pcommit);
3399 
3400 	}
3401 
3402 	if (tree_id1) {
3403 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3404 		if (err)
3405 			goto done;
3406 	}
3407 
3408 	tree_id2 = got_object_commit_get_tree_id(commit);
3409 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3410 	if (err)
3411 		goto done;
3412 
3413 	err = got_diff_tree(tree1, tree2, NULL, NULL, "", "", repo,
3414 	    got_diff_tree_collect_changed_paths, paths, 0);
3415 done:
3416 	if (tree1)
3417 		got_object_tree_close(tree1);
3418 	if (tree2)
3419 		got_object_tree_close(tree2);
3420 	free(tree_id1);
3421 	return err;
3422 }
3423 
3424 static const struct got_error *
3425 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3426 {
3427 	off_t *p;
3428 
3429 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3430 	if (p == NULL)
3431 		return got_error_from_errno("reallocarray");
3432 	*line_offsets = p;
3433 	(*line_offsets)[*nlines] = off;
3434 	(*nlines)++;
3435 	return NULL;
3436 }
3437 
3438 static const struct got_error *
3439 write_commit_info(off_t **line_offsets, size_t *nlines,
3440     struct got_object_id *commit_id, struct got_reflist_head *refs,
3441     struct got_repository *repo, FILE *outfile)
3442 {
3443 	const struct got_error *err = NULL;
3444 	char datebuf[26], *datestr;
3445 	struct got_commit_object *commit;
3446 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3447 	time_t committer_time;
3448 	const char *author, *committer;
3449 	char *refs_str = NULL;
3450 	struct got_pathlist_head changed_paths;
3451 	struct got_pathlist_entry *pe;
3452 	off_t outoff = 0;
3453 	int n;
3454 
3455 	TAILQ_INIT(&changed_paths);
3456 
3457 	if (refs) {
3458 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3459 		if (err)
3460 			return err;
3461 	}
3462 
3463 	err = got_object_open_as_commit(&commit, repo, commit_id);
3464 	if (err)
3465 		return err;
3466 
3467 	err = got_object_id_str(&id_str, commit_id);
3468 	if (err) {
3469 		err = got_error_from_errno("got_object_id_str");
3470 		goto done;
3471 	}
3472 
3473 	err = add_line_offset(line_offsets, nlines, 0);
3474 	if (err)
3475 		goto done;
3476 
3477 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3478 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3479 	if (n < 0) {
3480 		err = got_error_from_errno("fprintf");
3481 		goto done;
3482 	}
3483 	outoff += n;
3484 	err = add_line_offset(line_offsets, nlines, outoff);
3485 	if (err)
3486 		goto done;
3487 
3488 	n = fprintf(outfile, "from: %s\n",
3489 	    got_object_commit_get_author(commit));
3490 	if (n < 0) {
3491 		err = got_error_from_errno("fprintf");
3492 		goto done;
3493 	}
3494 	outoff += n;
3495 	err = add_line_offset(line_offsets, nlines, outoff);
3496 	if (err)
3497 		goto done;
3498 
3499 	committer_time = got_object_commit_get_committer_time(commit);
3500 	datestr = get_datestr(&committer_time, datebuf);
3501 	if (datestr) {
3502 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3503 		if (n < 0) {
3504 			err = got_error_from_errno("fprintf");
3505 			goto done;
3506 		}
3507 		outoff += n;
3508 		err = add_line_offset(line_offsets, nlines, outoff);
3509 		if (err)
3510 			goto done;
3511 	}
3512 	author = got_object_commit_get_author(commit);
3513 	committer = got_object_commit_get_committer(commit);
3514 	if (strcmp(author, committer) != 0) {
3515 		n = fprintf(outfile, "via: %s\n", committer);
3516 		if (n < 0) {
3517 			err = got_error_from_errno("fprintf");
3518 			goto done;
3519 		}
3520 		outoff += n;
3521 		err = add_line_offset(line_offsets, nlines, outoff);
3522 		if (err)
3523 			goto done;
3524 	}
3525 	if (got_object_commit_get_nparents(commit) > 1) {
3526 		const struct got_object_id_queue *parent_ids;
3527 		struct got_object_qid *qid;
3528 		int pn = 1;
3529 		parent_ids = got_object_commit_get_parent_ids(commit);
3530 		STAILQ_FOREACH(qid, parent_ids, entry) {
3531 			err = got_object_id_str(&id_str, &qid->id);
3532 			if (err)
3533 				goto done;
3534 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
3535 			if (n < 0) {
3536 				err = got_error_from_errno("fprintf");
3537 				goto done;
3538 			}
3539 			outoff += n;
3540 			err = add_line_offset(line_offsets, nlines, outoff);
3541 			if (err)
3542 				goto done;
3543 			free(id_str);
3544 			id_str = NULL;
3545 		}
3546 	}
3547 
3548 	err = got_object_commit_get_logmsg(&logmsg, commit);
3549 	if (err)
3550 		goto done;
3551 	s = logmsg;
3552 	while ((line = strsep(&s, "\n")) != NULL) {
3553 		n = fprintf(outfile, "%s\n", line);
3554 		if (n < 0) {
3555 			err = got_error_from_errno("fprintf");
3556 			goto done;
3557 		}
3558 		outoff += n;
3559 		err = add_line_offset(line_offsets, nlines, outoff);
3560 		if (err)
3561 			goto done;
3562 	}
3563 
3564 	err = get_changed_paths(&changed_paths, commit, repo);
3565 	if (err)
3566 		goto done;
3567 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3568 		struct got_diff_changed_path *cp = pe->data;
3569 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3570 		if (n < 0) {
3571 			err = got_error_from_errno("fprintf");
3572 			goto done;
3573 		}
3574 		outoff += n;
3575 		err = add_line_offset(line_offsets, nlines, outoff);
3576 		if (err)
3577 			goto done;
3578 		free((char *)pe->path);
3579 		free(pe->data);
3580 	}
3581 
3582 	fputc('\n', outfile);
3583 	outoff++;
3584 	err = add_line_offset(line_offsets, nlines, outoff);
3585 done:
3586 	got_pathlist_free(&changed_paths);
3587 	free(id_str);
3588 	free(logmsg);
3589 	free(refs_str);
3590 	got_object_commit_close(commit);
3591 	if (err) {
3592 		free(*line_offsets);
3593 		*line_offsets = NULL;
3594 		*nlines = 0;
3595 	}
3596 	return err;
3597 }
3598 
3599 static const struct got_error *
3600 create_diff(struct tog_diff_view_state *s)
3601 {
3602 	const struct got_error *err = NULL;
3603 	FILE *f = NULL;
3604 	int obj_type;
3605 
3606 	free(s->line_offsets);
3607 	s->line_offsets = malloc(sizeof(off_t));
3608 	if (s->line_offsets == NULL)
3609 		return got_error_from_errno("malloc");
3610 	s->nlines = 0;
3611 
3612 	f = got_opentemp();
3613 	if (f == NULL) {
3614 		err = got_error_from_errno("got_opentemp");
3615 		goto done;
3616 	}
3617 	if (s->f && fclose(s->f) == EOF) {
3618 		err = got_error_from_errno("fclose");
3619 		goto done;
3620 	}
3621 	s->f = f;
3622 
3623 	if (s->id1)
3624 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3625 	else
3626 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3627 	if (err)
3628 		goto done;
3629 
3630 	switch (obj_type) {
3631 	case GOT_OBJ_TYPE_BLOB:
3632 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3633 		    s->f1, s->f2, s->id1, s->id2, s->label1, s->label2,
3634 		    s->diff_context, s->ignore_whitespace, s->force_text_diff,
3635 		    s->repo, s->f);
3636 		break;
3637 	case GOT_OBJ_TYPE_TREE:
3638 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3639 		    s->f1, s->f2, s->id1, s->id2, NULL, "", "", s->diff_context,
3640 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3641 		break;
3642 	case GOT_OBJ_TYPE_COMMIT: {
3643 		const struct got_object_id_queue *parent_ids;
3644 		struct got_object_qid *pid;
3645 		struct got_commit_object *commit2;
3646 		struct got_reflist_head *refs;
3647 
3648 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3649 		if (err)
3650 			goto done;
3651 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
3652 		/* Show commit info if we're diffing to a parent/root commit. */
3653 		if (s->id1 == NULL) {
3654 			err = write_commit_info(&s->line_offsets, &s->nlines,
3655 			    s->id2, refs, s->repo, s->f);
3656 			if (err)
3657 				goto done;
3658 		} else {
3659 			parent_ids = got_object_commit_get_parent_ids(commit2);
3660 			STAILQ_FOREACH(pid, parent_ids, entry) {
3661 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
3662 					err = write_commit_info(
3663 					    &s->line_offsets, &s->nlines,
3664 					    s->id2, refs, s->repo, s->f);
3665 					if (err)
3666 						goto done;
3667 					break;
3668 				}
3669 			}
3670 		}
3671 		got_object_commit_close(commit2);
3672 
3673 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3674 		    s->f1, s->f2, s->id1, s->id2, NULL, s->diff_context,
3675 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3676 		break;
3677 	}
3678 	default:
3679 		err = got_error(GOT_ERR_OBJ_TYPE);
3680 		break;
3681 	}
3682 	if (err)
3683 		goto done;
3684 done:
3685 	if (s->f && fflush(s->f) != 0 && err == NULL)
3686 		err = got_error_from_errno("fflush");
3687 	return err;
3688 }
3689 
3690 static void
3691 diff_view_indicate_progress(struct tog_view *view)
3692 {
3693 	mvwaddstr(view->window, 0, 0, "diffing...");
3694 	update_panels();
3695 	doupdate();
3696 }
3697 
3698 static const struct got_error *
3699 search_start_diff_view(struct tog_view *view)
3700 {
3701 	struct tog_diff_view_state *s = &view->state.diff;
3702 
3703 	s->matched_line = 0;
3704 	return NULL;
3705 }
3706 
3707 static const struct got_error *
3708 search_next_diff_view(struct tog_view *view)
3709 {
3710 	struct tog_diff_view_state *s = &view->state.diff;
3711 	const struct got_error *err = NULL;
3712 	int lineno;
3713 	char *line = NULL;
3714 	size_t linesize = 0;
3715 	ssize_t linelen;
3716 
3717 	if (!view->searching) {
3718 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3719 		return NULL;
3720 	}
3721 
3722 	if (s->matched_line) {
3723 		if (view->searching == TOG_SEARCH_FORWARD)
3724 			lineno = s->matched_line + 1;
3725 		else
3726 			lineno = s->matched_line - 1;
3727 	} else
3728 		lineno = s->first_displayed_line;
3729 
3730 	while (1) {
3731 		off_t offset;
3732 
3733 		if (lineno <= 0 || lineno > s->nlines) {
3734 			if (s->matched_line == 0) {
3735 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3736 				break;
3737 			}
3738 
3739 			if (view->searching == TOG_SEARCH_FORWARD)
3740 				lineno = 1;
3741 			else
3742 				lineno = s->nlines;
3743 		}
3744 
3745 		offset = s->line_offsets[lineno - 1];
3746 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3747 			free(line);
3748 			return got_error_from_errno("fseeko");
3749 		}
3750 		linelen = getline(&line, &linesize, s->f);
3751 		if (linelen != -1) {
3752 			char *exstr;
3753 			err = expand_tab(&exstr, line);
3754 			if (err)
3755 				break;
3756 			if (match_line(exstr, &view->regex, 1,
3757 			    &view->regmatch)) {
3758 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3759 				s->matched_line = lineno;
3760 				free(exstr);
3761 				break;
3762 			}
3763 			free(exstr);
3764 		}
3765 		if (view->searching == TOG_SEARCH_FORWARD)
3766 			lineno++;
3767 		else
3768 			lineno--;
3769 	}
3770 	free(line);
3771 
3772 	if (s->matched_line) {
3773 		s->first_displayed_line = s->matched_line;
3774 		s->selected_line = 1;
3775 	}
3776 
3777 	return err;
3778 }
3779 
3780 static const struct got_error *
3781 close_diff_view(struct tog_view *view)
3782 {
3783 	const struct got_error *err = NULL;
3784 	struct tog_diff_view_state *s = &view->state.diff;
3785 
3786 	free(s->id1);
3787 	s->id1 = NULL;
3788 	free(s->id2);
3789 	s->id2 = NULL;
3790 	if (s->f && fclose(s->f) == EOF)
3791 		err = got_error_from_errno("fclose");
3792 	s->f = NULL;
3793 	if (s->f1 && fclose(s->f1) == EOF)
3794 		err = got_error_from_errno("fclose");
3795 	s->f1 = NULL;
3796 	if (s->f2 && fclose(s->f2) == EOF)
3797 		err = got_error_from_errno("fclose");
3798 	s->f2 = NULL;
3799 	free_colors(&s->colors);
3800 	free(s->line_offsets);
3801 	s->line_offsets = NULL;
3802 	s->nlines = 0;
3803 	return err;
3804 }
3805 
3806 static const struct got_error *
3807 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3808     struct got_object_id *id2, const char *label1, const char *label2,
3809     int diff_context, int ignore_whitespace, int force_text_diff,
3810     struct tog_view *log_view, struct got_repository *repo)
3811 {
3812 	const struct got_error *err;
3813 	struct tog_diff_view_state *s = &view->state.diff;
3814 
3815 	memset(s, 0, sizeof(*s));
3816 
3817 	if (id1 != NULL && id2 != NULL) {
3818 	    int type1, type2;
3819 	    err = got_object_get_type(&type1, repo, id1);
3820 	    if (err)
3821 		return err;
3822 	    err = got_object_get_type(&type2, repo, id2);
3823 	    if (err)
3824 		return err;
3825 
3826 	    if (type1 != type2)
3827 		return got_error(GOT_ERR_OBJ_TYPE);
3828 	}
3829 	s->first_displayed_line = 1;
3830 	s->last_displayed_line = view->nlines;
3831 	s->selected_line = 1;
3832 	s->repo = repo;
3833 	s->id1 = id1;
3834 	s->id2 = id2;
3835 	s->label1 = label1;
3836 	s->label2 = label2;
3837 
3838 	if (id1) {
3839 		s->id1 = got_object_id_dup(id1);
3840 		if (s->id1 == NULL)
3841 			return got_error_from_errno("got_object_id_dup");
3842 		s->f1 = got_opentemp();
3843 		if (s->f1 == NULL) {
3844 			err = got_error_from_errno("got_opentemp");
3845 			goto done;
3846 		}
3847 	} else
3848 		s->id1 = NULL;
3849 
3850 	s->id2 = got_object_id_dup(id2);
3851 	if (s->id2 == NULL) {
3852 		err = got_error_from_errno("got_object_id_dup");
3853 		goto done;
3854 	}
3855 
3856 	s->f2 = got_opentemp();
3857 	if (s->f2 == NULL) {
3858 		err = got_error_from_errno("got_opentemp");
3859 		goto done;
3860 	}
3861 
3862 	s->first_displayed_line = 1;
3863 	s->last_displayed_line = view->nlines;
3864 	s->diff_context = diff_context;
3865 	s->ignore_whitespace = ignore_whitespace;
3866 	s->force_text_diff = force_text_diff;
3867 	s->log_view = log_view;
3868 	s->repo = repo;
3869 
3870 	STAILQ_INIT(&s->colors);
3871 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3872 		err = add_color(&s->colors,
3873 		    "^-", TOG_COLOR_DIFF_MINUS,
3874 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3875 		if (err)
3876 			goto done;
3877 		err = add_color(&s->colors, "^\\+",
3878 		    TOG_COLOR_DIFF_PLUS,
3879 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3880 		if (err)
3881 			goto done;
3882 		err = add_color(&s->colors,
3883 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3884 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3885 		if (err)
3886 			goto done;
3887 
3888 		err = add_color(&s->colors,
3889 		    "^(commit [0-9a-f]|parent [0-9]|(blob|file) [-+] |"
3890 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
3891 		    get_color_value("TOG_COLOR_DIFF_META"));
3892 		if (err)
3893 			goto done;
3894 
3895 		err = add_color(&s->colors,
3896 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3897 		    get_color_value("TOG_COLOR_AUTHOR"));
3898 		if (err)
3899 			goto done;
3900 
3901 		err = add_color(&s->colors,
3902 		    "^date: ", TOG_COLOR_DATE,
3903 		    get_color_value("TOG_COLOR_DATE"));
3904 		if (err)
3905 			goto done;
3906 	}
3907 
3908 	if (log_view && view_is_splitscreen(view))
3909 		show_log_view(log_view); /* draw vborder */
3910 	diff_view_indicate_progress(view);
3911 
3912 	err = create_diff(s);
3913 
3914 	view->show = show_diff_view;
3915 	view->input = input_diff_view;
3916 	view->close = close_diff_view;
3917 	view->search_start = search_start_diff_view;
3918 	view->search_next = search_next_diff_view;
3919 done:
3920 	if (err)
3921 		close_diff_view(view);
3922 	return err;
3923 }
3924 
3925 static const struct got_error *
3926 show_diff_view(struct tog_view *view)
3927 {
3928 	const struct got_error *err;
3929 	struct tog_diff_view_state *s = &view->state.diff;
3930 	char *id_str1 = NULL, *id_str2, *header;
3931 	const char *label1, *label2;
3932 
3933 	if (s->id1) {
3934 		err = got_object_id_str(&id_str1, s->id1);
3935 		if (err)
3936 			return err;
3937 		label1 = s->label1 ? : id_str1;
3938 	} else
3939 		label1 = "/dev/null";
3940 
3941 	err = got_object_id_str(&id_str2, s->id2);
3942 	if (err)
3943 		return err;
3944 	label2 = s->label2 ? : id_str2;
3945 
3946 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3947 		err = got_error_from_errno("asprintf");
3948 		free(id_str1);
3949 		free(id_str2);
3950 		return err;
3951 	}
3952 	free(id_str1);
3953 	free(id_str2);
3954 
3955 	err = draw_file(view, header);
3956 	free(header);
3957 	return err;
3958 }
3959 
3960 static const struct got_error *
3961 set_selected_commit(struct tog_diff_view_state *s,
3962     struct commit_queue_entry *entry)
3963 {
3964 	const struct got_error *err;
3965 	const struct got_object_id_queue *parent_ids;
3966 	struct got_commit_object *selected_commit;
3967 	struct got_object_qid *pid;
3968 
3969 	free(s->id2);
3970 	s->id2 = got_object_id_dup(entry->id);
3971 	if (s->id2 == NULL)
3972 		return got_error_from_errno("got_object_id_dup");
3973 
3974 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3975 	if (err)
3976 		return err;
3977 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3978 	free(s->id1);
3979 	pid = STAILQ_FIRST(parent_ids);
3980 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
3981 	got_object_commit_close(selected_commit);
3982 	return NULL;
3983 }
3984 
3985 static const struct got_error *
3986 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
3987 {
3988 	const struct got_error *err = NULL;
3989 	struct tog_diff_view_state *s = &view->state.diff;
3990 	struct tog_log_view_state *ls;
3991 	struct commit_queue_entry *old_selected_entry;
3992 	char *line = NULL;
3993 	size_t linesize = 0;
3994 	ssize_t linelen;
3995 	int i, nscroll = view->nlines - 1;
3996 
3997 	switch (ch) {
3998 	case '0':
3999 		view->x = 0;
4000 		break;
4001 	case '$':
4002 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4003 		break;
4004 	case KEY_RIGHT:
4005 	case 'l':
4006 		if (view->x + view->ncols / 3 < view->maxx)
4007 			view->x += 2;  /* move two columns right */
4008 		break;
4009 	case KEY_LEFT:
4010 	case 'h':
4011 		view->x -= MIN(view->x, 2);  /* move two columns back */
4012 		break;
4013 	case 'a':
4014 	case 'w':
4015 		if (ch == 'a')
4016 			s->force_text_diff = !s->force_text_diff;
4017 		if (ch == 'w')
4018 			s->ignore_whitespace = !s->ignore_whitespace;
4019 		wclear(view->window);
4020 		s->first_displayed_line = 1;
4021 		s->last_displayed_line = view->nlines;
4022 		s->matched_line = 0;
4023 		diff_view_indicate_progress(view);
4024 		err = create_diff(s);
4025 		break;
4026 	case 'g':
4027 	case KEY_HOME:
4028 		s->first_displayed_line = 1;
4029 		break;
4030 	case 'G':
4031 	case KEY_END:
4032 		if (s->eof)
4033 			break;
4034 
4035 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4036 		s->eof = 1;
4037 		break;
4038 	case 'k':
4039 	case KEY_UP:
4040 	case CTRL('p'):
4041 		if (s->first_displayed_line > 1)
4042 			s->first_displayed_line--;
4043 		break;
4044 	case CTRL('u'):
4045 	case 'u':
4046 		nscroll /= 2;
4047 		/* FALL THROUGH */
4048 	case KEY_PPAGE:
4049 	case CTRL('b'):
4050 		if (s->first_displayed_line == 1)
4051 			break;
4052 		i = 0;
4053 		while (i++ < nscroll && s->first_displayed_line > 1)
4054 			s->first_displayed_line--;
4055 		break;
4056 	case 'j':
4057 	case KEY_DOWN:
4058 	case CTRL('n'):
4059 		if (!s->eof)
4060 			s->first_displayed_line++;
4061 		break;
4062 	case CTRL('d'):
4063 	case 'd':
4064 		nscroll /= 2;
4065 		/* FALL THROUGH */
4066 	case KEY_NPAGE:
4067 	case CTRL('f'):
4068 	case ' ':
4069 		if (s->eof)
4070 			break;
4071 		i = 0;
4072 		while (!s->eof && i++ < nscroll) {
4073 			linelen = getline(&line, &linesize, s->f);
4074 			s->first_displayed_line++;
4075 			if (linelen == -1) {
4076 				if (feof(s->f)) {
4077 					s->eof = 1;
4078 				} else
4079 					err = got_ferror(s->f, GOT_ERR_IO);
4080 				break;
4081 			}
4082 		}
4083 		free(line);
4084 		break;
4085 	case '[':
4086 		if (s->diff_context > 0) {
4087 			s->diff_context--;
4088 			s->matched_line = 0;
4089 			diff_view_indicate_progress(view);
4090 			err = create_diff(s);
4091 			if (s->first_displayed_line + view->nlines - 1 >
4092 			    s->nlines) {
4093 				s->first_displayed_line = 1;
4094 				s->last_displayed_line = view->nlines;
4095 			}
4096 		}
4097 		break;
4098 	case ']':
4099 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4100 			s->diff_context++;
4101 			s->matched_line = 0;
4102 			diff_view_indicate_progress(view);
4103 			err = create_diff(s);
4104 		}
4105 		break;
4106 	case '<':
4107 	case ',':
4108 		if (s->log_view == NULL)
4109 			break;
4110 		ls = &s->log_view->state.log;
4111 		old_selected_entry = ls->selected_entry;
4112 
4113 		err = input_log_view(NULL, s->log_view, KEY_UP);
4114 		if (err)
4115 			break;
4116 
4117 		if (old_selected_entry == ls->selected_entry)
4118 			break;
4119 
4120 		err = set_selected_commit(s, ls->selected_entry);
4121 		if (err)
4122 			break;
4123 
4124 		s->first_displayed_line = 1;
4125 		s->last_displayed_line = view->nlines;
4126 		s->matched_line = 0;
4127 		view->x = 0;
4128 
4129 		diff_view_indicate_progress(view);
4130 		err = create_diff(s);
4131 		break;
4132 	case '>':
4133 	case '.':
4134 		if (s->log_view == NULL)
4135 			break;
4136 		ls = &s->log_view->state.log;
4137 		old_selected_entry = ls->selected_entry;
4138 
4139 		err = input_log_view(NULL, s->log_view, KEY_DOWN);
4140 		if (err)
4141 			break;
4142 
4143 		if (old_selected_entry == ls->selected_entry)
4144 			break;
4145 
4146 		err = set_selected_commit(s, ls->selected_entry);
4147 		if (err)
4148 			break;
4149 
4150 		s->first_displayed_line = 1;
4151 		s->last_displayed_line = view->nlines;
4152 		s->matched_line = 0;
4153 		view->x = 0;
4154 
4155 		diff_view_indicate_progress(view);
4156 		err = create_diff(s);
4157 		break;
4158 	default:
4159 		break;
4160 	}
4161 
4162 	return err;
4163 }
4164 
4165 static const struct got_error *
4166 cmd_diff(int argc, char *argv[])
4167 {
4168 	const struct got_error *error = NULL;
4169 	struct got_repository *repo = NULL;
4170 	struct got_worktree *worktree = NULL;
4171 	struct got_object_id *id1 = NULL, *id2 = NULL;
4172 	char *repo_path = NULL, *cwd = NULL;
4173 	char *id_str1 = NULL, *id_str2 = NULL;
4174 	char *label1 = NULL, *label2 = NULL;
4175 	int diff_context = 3, ignore_whitespace = 0;
4176 	int ch, force_text_diff = 0;
4177 	const char *errstr;
4178 	struct tog_view *view;
4179 	int *pack_fds = NULL;
4180 
4181 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4182 		switch (ch) {
4183 		case 'a':
4184 			force_text_diff = 1;
4185 			break;
4186 		case 'C':
4187 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4188 			    &errstr);
4189 			if (errstr != NULL)
4190 				errx(1, "number of context lines is %s: %s",
4191 				    errstr, errstr);
4192 			break;
4193 		case 'r':
4194 			repo_path = realpath(optarg, NULL);
4195 			if (repo_path == NULL)
4196 				return got_error_from_errno2("realpath",
4197 				    optarg);
4198 			got_path_strip_trailing_slashes(repo_path);
4199 			break;
4200 		case 'w':
4201 			ignore_whitespace = 1;
4202 			break;
4203 		default:
4204 			usage_diff();
4205 			/* NOTREACHED */
4206 		}
4207 	}
4208 
4209 	argc -= optind;
4210 	argv += optind;
4211 
4212 	if (argc == 0) {
4213 		usage_diff(); /* TODO show local worktree changes */
4214 	} else if (argc == 2) {
4215 		id_str1 = argv[0];
4216 		id_str2 = argv[1];
4217 	} else
4218 		usage_diff();
4219 
4220 	error = got_repo_pack_fds_open(&pack_fds);
4221 	if (error)
4222 		goto done;
4223 
4224 	if (repo_path == NULL) {
4225 		cwd = getcwd(NULL, 0);
4226 		if (cwd == NULL)
4227 			return got_error_from_errno("getcwd");
4228 		error = got_worktree_open(&worktree, cwd);
4229 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4230 			goto done;
4231 		if (worktree)
4232 			repo_path =
4233 			    strdup(got_worktree_get_repo_path(worktree));
4234 		else
4235 			repo_path = strdup(cwd);
4236 		if (repo_path == NULL) {
4237 			error = got_error_from_errno("strdup");
4238 			goto done;
4239 		}
4240 	}
4241 
4242 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4243 	if (error)
4244 		goto done;
4245 
4246 	init_curses();
4247 
4248 	error = apply_unveil(got_repo_get_path(repo), NULL);
4249 	if (error)
4250 		goto done;
4251 
4252 	error = tog_load_refs(repo, 0);
4253 	if (error)
4254 		goto done;
4255 
4256 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4257 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4258 	if (error)
4259 		goto done;
4260 
4261 	error = got_repo_match_object_id(&id2, &label2, id_str2,
4262 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4263 	if (error)
4264 		goto done;
4265 
4266 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
4267 	if (view == NULL) {
4268 		error = got_error_from_errno("view_open");
4269 		goto done;
4270 	}
4271 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
4272 	    ignore_whitespace, force_text_diff, NULL,  repo);
4273 	if (error)
4274 		goto done;
4275 	error = view_loop(view);
4276 done:
4277 	free(label1);
4278 	free(label2);
4279 	free(repo_path);
4280 	free(cwd);
4281 	if (repo) {
4282 		const struct got_error *close_err = got_repo_close(repo);
4283 		if (error == NULL)
4284 			error = close_err;
4285 	}
4286 	if (worktree)
4287 		got_worktree_close(worktree);
4288 	if (pack_fds) {
4289 		const struct got_error *pack_err =
4290 		    got_repo_pack_fds_close(pack_fds);
4291 		if (error == NULL)
4292 			error = pack_err;
4293 	}
4294 	tog_free_refs();
4295 	return error;
4296 }
4297 
4298 __dead static void
4299 usage_blame(void)
4300 {
4301 	endwin();
4302 	fprintf(stderr,
4303 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
4304 	    getprogname());
4305 	exit(1);
4306 }
4307 
4308 struct tog_blame_line {
4309 	int annotated;
4310 	struct got_object_id *id;
4311 };
4312 
4313 static const struct got_error *
4314 draw_blame(struct tog_view *view)
4315 {
4316 	struct tog_blame_view_state *s = &view->state.blame;
4317 	struct tog_blame *blame = &s->blame;
4318 	regmatch_t *regmatch = &view->regmatch;
4319 	const struct got_error *err;
4320 	int lineno = 0, nprinted = 0;
4321 	char *line = NULL;
4322 	size_t linesize = 0;
4323 	ssize_t linelen;
4324 	wchar_t *wline;
4325 	int width;
4326 	struct tog_blame_line *blame_line;
4327 	struct got_object_id *prev_id = NULL;
4328 	char *id_str;
4329 	struct tog_color *tc;
4330 
4331 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
4332 	if (err)
4333 		return err;
4334 
4335 	rewind(blame->f);
4336 	werase(view->window);
4337 
4338 	if (asprintf(&line, "commit %s", id_str) == -1) {
4339 		err = got_error_from_errno("asprintf");
4340 		free(id_str);
4341 		return err;
4342 	}
4343 
4344 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4345 	free(line);
4346 	line = NULL;
4347 	if (err)
4348 		return err;
4349 	if (view_needs_focus_indication(view))
4350 		wstandout(view->window);
4351 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4352 	if (tc)
4353 		wattr_on(view->window,
4354 		    COLOR_PAIR(tc->colorpair), NULL);
4355 	waddwstr(view->window, wline);
4356 	if (tc)
4357 		wattr_off(view->window,
4358 		    COLOR_PAIR(tc->colorpair), NULL);
4359 	if (view_needs_focus_indication(view))
4360 		wstandend(view->window);
4361 	free(wline);
4362 	wline = NULL;
4363 	if (width < view->ncols - 1)
4364 		waddch(view->window, '\n');
4365 
4366 	if (asprintf(&line, "[%d/%d] %s%s",
4367 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
4368 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
4369 		free(id_str);
4370 		return got_error_from_errno("asprintf");
4371 	}
4372 	free(id_str);
4373 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
4374 	free(line);
4375 	line = NULL;
4376 	if (err)
4377 		return err;
4378 	waddwstr(view->window, wline);
4379 	free(wline);
4380 	wline = NULL;
4381 	if (width < view->ncols - 1)
4382 		waddch(view->window, '\n');
4383 
4384 	s->eof = 0;
4385 	view->maxx = 0;
4386 	while (nprinted < view->nlines - 2) {
4387 		linelen = getline(&line, &linesize, blame->f);
4388 		if (linelen == -1) {
4389 			if (feof(blame->f)) {
4390 				s->eof = 1;
4391 				break;
4392 			}
4393 			free(line);
4394 			return got_ferror(blame->f, GOT_ERR_IO);
4395 		}
4396 		if (++lineno < s->first_displayed_line)
4397 			continue;
4398 
4399 		/* Set view->maxx based on full line length. */
4400 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
4401 		if (err) {
4402 			free(line);
4403 			return err;
4404 		}
4405 		free(wline);
4406 		wline = NULL;
4407 		view->maxx = MAX(view->maxx, width);
4408 
4409 		if (view->focussed && nprinted == s->selected_line - 1)
4410 			wstandout(view->window);
4411 
4412 		if (blame->nlines > 0) {
4413 			blame_line = &blame->lines[lineno - 1];
4414 			if (blame_line->annotated && prev_id &&
4415 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
4416 			    !(view->focussed &&
4417 			    nprinted == s->selected_line - 1)) {
4418 				waddstr(view->window, "        ");
4419 			} else if (blame_line->annotated) {
4420 				char *id_str;
4421 				err = got_object_id_str(&id_str,
4422 				    blame_line->id);
4423 				if (err) {
4424 					free(line);
4425 					return err;
4426 				}
4427 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4428 				if (tc)
4429 					wattr_on(view->window,
4430 					    COLOR_PAIR(tc->colorpair), NULL);
4431 				wprintw(view->window, "%.8s", id_str);
4432 				if (tc)
4433 					wattr_off(view->window,
4434 					    COLOR_PAIR(tc->colorpair), NULL);
4435 				free(id_str);
4436 				prev_id = blame_line->id;
4437 			} else {
4438 				waddstr(view->window, "........");
4439 				prev_id = NULL;
4440 			}
4441 		} else {
4442 			waddstr(view->window, "........");
4443 			prev_id = NULL;
4444 		}
4445 
4446 		if (view->focussed && nprinted == s->selected_line - 1)
4447 			wstandend(view->window);
4448 		waddstr(view->window, " ");
4449 
4450 		if (view->ncols <= 9) {
4451 			width = 9;
4452 		} else if (s->first_displayed_line + nprinted ==
4453 		    s->matched_line &&
4454 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4455 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4456 			    view->window, view->x, regmatch);
4457 			if (err) {
4458 				free(line);
4459 				return err;
4460 			}
4461 			width += 9;
4462 		} else {
4463 			int skip;
4464 			err = format_line(&wline, &width, &skip, line,
4465 			    view->x, view->ncols - 9, 9, 1);
4466 			if (err) {
4467 				free(line);
4468 				return err;
4469 			}
4470 			waddwstr(view->window, &wline[skip]);
4471 			width += 9;
4472 			free(wline);
4473 			wline = NULL;
4474 		}
4475 
4476 		if (width <= view->ncols - 1)
4477 			waddch(view->window, '\n');
4478 		if (++nprinted == 1)
4479 			s->first_displayed_line = lineno;
4480 	}
4481 	free(line);
4482 	s->last_displayed_line = lineno;
4483 
4484 	view_vborder(view);
4485 
4486 	return NULL;
4487 }
4488 
4489 static const struct got_error *
4490 blame_cb(void *arg, int nlines, int lineno,
4491     struct got_commit_object *commit, struct got_object_id *id)
4492 {
4493 	const struct got_error *err = NULL;
4494 	struct tog_blame_cb_args *a = arg;
4495 	struct tog_blame_line *line;
4496 	int errcode;
4497 
4498 	if (nlines != a->nlines ||
4499 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4500 		return got_error(GOT_ERR_RANGE);
4501 
4502 	errcode = pthread_mutex_lock(&tog_mutex);
4503 	if (errcode)
4504 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4505 
4506 	if (*a->quit) {	/* user has quit the blame view */
4507 		err = got_error(GOT_ERR_ITER_COMPLETED);
4508 		goto done;
4509 	}
4510 
4511 	if (lineno == -1)
4512 		goto done; /* no change in this commit */
4513 
4514 	line = &a->lines[lineno - 1];
4515 	if (line->annotated)
4516 		goto done;
4517 
4518 	line->id = got_object_id_dup(id);
4519 	if (line->id == NULL) {
4520 		err = got_error_from_errno("got_object_id_dup");
4521 		goto done;
4522 	}
4523 	line->annotated = 1;
4524 done:
4525 	errcode = pthread_mutex_unlock(&tog_mutex);
4526 	if (errcode)
4527 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4528 	return err;
4529 }
4530 
4531 static void *
4532 blame_thread(void *arg)
4533 {
4534 	const struct got_error *err, *close_err;
4535 	struct tog_blame_thread_args *ta = arg;
4536 	struct tog_blame_cb_args *a = ta->cb_args;
4537 	int errcode;
4538 
4539 	err = block_signals_used_by_main_thread();
4540 	if (err)
4541 		return (void *)err;
4542 
4543 	err = got_blame(ta->path, a->commit_id, ta->repo,
4544 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4545 	if (err && err->code == GOT_ERR_CANCELLED)
4546 		err = NULL;
4547 
4548 	errcode = pthread_mutex_lock(&tog_mutex);
4549 	if (errcode)
4550 		return (void *)got_error_set_errno(errcode,
4551 		    "pthread_mutex_lock");
4552 
4553 	close_err = got_repo_close(ta->repo);
4554 	if (err == NULL)
4555 		err = close_err;
4556 	ta->repo = NULL;
4557 	*ta->complete = 1;
4558 
4559 	errcode = pthread_mutex_unlock(&tog_mutex);
4560 	if (errcode && err == NULL)
4561 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4562 
4563 	return (void *)err;
4564 }
4565 
4566 static struct got_object_id *
4567 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4568     int first_displayed_line, int selected_line)
4569 {
4570 	struct tog_blame_line *line;
4571 
4572 	if (nlines <= 0)
4573 		return NULL;
4574 
4575 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4576 	if (!line->annotated)
4577 		return NULL;
4578 
4579 	return line->id;
4580 }
4581 
4582 static const struct got_error *
4583 stop_blame(struct tog_blame *blame)
4584 {
4585 	const struct got_error *err = NULL;
4586 	int i;
4587 
4588 	if (blame->thread) {
4589 		int errcode;
4590 		errcode = pthread_mutex_unlock(&tog_mutex);
4591 		if (errcode)
4592 			return got_error_set_errno(errcode,
4593 			    "pthread_mutex_unlock");
4594 		errcode = pthread_join(blame->thread, (void **)&err);
4595 		if (errcode)
4596 			return got_error_set_errno(errcode, "pthread_join");
4597 		errcode = pthread_mutex_lock(&tog_mutex);
4598 		if (errcode)
4599 			return got_error_set_errno(errcode,
4600 			    "pthread_mutex_lock");
4601 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4602 			err = NULL;
4603 		blame->thread = 0; //NULL;
4604 	}
4605 	if (blame->thread_args.repo) {
4606 		const struct got_error *close_err;
4607 		close_err = got_repo_close(blame->thread_args.repo);
4608 		if (err == NULL)
4609 			err = close_err;
4610 		blame->thread_args.repo = NULL;
4611 	}
4612 	if (blame->f) {
4613 		if (fclose(blame->f) == EOF && err == NULL)
4614 			err = got_error_from_errno("fclose");
4615 		blame->f = NULL;
4616 	}
4617 	if (blame->lines) {
4618 		for (i = 0; i < blame->nlines; i++)
4619 			free(blame->lines[i].id);
4620 		free(blame->lines);
4621 		blame->lines = NULL;
4622 	}
4623 	free(blame->cb_args.commit_id);
4624 	blame->cb_args.commit_id = NULL;
4625 	if (blame->pack_fds) {
4626 		const struct got_error *pack_err =
4627 		    got_repo_pack_fds_close(blame->pack_fds);
4628 		if (err == NULL)
4629 			err = pack_err;
4630 		blame->pack_fds = NULL;
4631 	}
4632 	return err;
4633 }
4634 
4635 static const struct got_error *
4636 cancel_blame_view(void *arg)
4637 {
4638 	const struct got_error *err = NULL;
4639 	int *done = arg;
4640 	int errcode;
4641 
4642 	errcode = pthread_mutex_lock(&tog_mutex);
4643 	if (errcode)
4644 		return got_error_set_errno(errcode,
4645 		    "pthread_mutex_unlock");
4646 
4647 	if (*done)
4648 		err = got_error(GOT_ERR_CANCELLED);
4649 
4650 	errcode = pthread_mutex_unlock(&tog_mutex);
4651 	if (errcode)
4652 		return got_error_set_errno(errcode,
4653 		    "pthread_mutex_lock");
4654 
4655 	return err;
4656 }
4657 
4658 static const struct got_error *
4659 run_blame(struct tog_view *view)
4660 {
4661 	struct tog_blame_view_state *s = &view->state.blame;
4662 	struct tog_blame *blame = &s->blame;
4663 	const struct got_error *err = NULL;
4664 	struct got_commit_object *commit = NULL;
4665 	struct got_blob_object *blob = NULL;
4666 	struct got_repository *thread_repo = NULL;
4667 	struct got_object_id *obj_id = NULL;
4668 	int obj_type;
4669 	int *pack_fds = NULL;
4670 
4671 	err = got_object_open_as_commit(&commit, s->repo,
4672 	    &s->blamed_commit->id);
4673 	if (err)
4674 		return err;
4675 
4676 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
4677 	if (err)
4678 		goto done;
4679 
4680 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4681 	if (err)
4682 		goto done;
4683 
4684 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4685 		err = got_error(GOT_ERR_OBJ_TYPE);
4686 		goto done;
4687 	}
4688 
4689 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4690 	if (err)
4691 		goto done;
4692 	blame->f = got_opentemp();
4693 	if (blame->f == NULL) {
4694 		err = got_error_from_errno("got_opentemp");
4695 		goto done;
4696 	}
4697 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4698 	    &blame->line_offsets, blame->f, blob);
4699 	if (err)
4700 		goto done;
4701 	if (blame->nlines == 0) {
4702 		s->blame_complete = 1;
4703 		goto done;
4704 	}
4705 
4706 	/* Don't include \n at EOF in the blame line count. */
4707 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4708 		blame->nlines--;
4709 
4710 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4711 	if (blame->lines == NULL) {
4712 		err = got_error_from_errno("calloc");
4713 		goto done;
4714 	}
4715 
4716 	err = got_repo_pack_fds_open(&pack_fds);
4717 	if (err)
4718 		goto done;
4719 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
4720 	    pack_fds);
4721 	if (err)
4722 		goto done;
4723 
4724 	blame->pack_fds = pack_fds;
4725 	blame->cb_args.view = view;
4726 	blame->cb_args.lines = blame->lines;
4727 	blame->cb_args.nlines = blame->nlines;
4728 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
4729 	if (blame->cb_args.commit_id == NULL) {
4730 		err = got_error_from_errno("got_object_id_dup");
4731 		goto done;
4732 	}
4733 	blame->cb_args.quit = &s->done;
4734 
4735 	blame->thread_args.path = s->path;
4736 	blame->thread_args.repo = thread_repo;
4737 	blame->thread_args.cb_args = &blame->cb_args;
4738 	blame->thread_args.complete = &s->blame_complete;
4739 	blame->thread_args.cancel_cb = cancel_blame_view;
4740 	blame->thread_args.cancel_arg = &s->done;
4741 	s->blame_complete = 0;
4742 
4743 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
4744 		s->first_displayed_line = 1;
4745 		s->last_displayed_line = view->nlines;
4746 		s->selected_line = 1;
4747 	}
4748 	s->matched_line = 0;
4749 
4750 done:
4751 	if (commit)
4752 		got_object_commit_close(commit);
4753 	if (blob)
4754 		got_object_blob_close(blob);
4755 	free(obj_id);
4756 	if (err)
4757 		stop_blame(blame);
4758 	return err;
4759 }
4760 
4761 static const struct got_error *
4762 open_blame_view(struct tog_view *view, char *path,
4763     struct got_object_id *commit_id, struct got_repository *repo)
4764 {
4765 	const struct got_error *err = NULL;
4766 	struct tog_blame_view_state *s = &view->state.blame;
4767 
4768 	STAILQ_INIT(&s->blamed_commits);
4769 
4770 	s->path = strdup(path);
4771 	if (s->path == NULL)
4772 		return got_error_from_errno("strdup");
4773 
4774 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4775 	if (err) {
4776 		free(s->path);
4777 		return err;
4778 	}
4779 
4780 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4781 	s->first_displayed_line = 1;
4782 	s->last_displayed_line = view->nlines;
4783 	s->selected_line = 1;
4784 	s->blame_complete = 0;
4785 	s->repo = repo;
4786 	s->commit_id = commit_id;
4787 	memset(&s->blame, 0, sizeof(s->blame));
4788 
4789 	STAILQ_INIT(&s->colors);
4790 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4791 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4792 		    get_color_value("TOG_COLOR_COMMIT"));
4793 		if (err)
4794 			return err;
4795 	}
4796 
4797 	view->show = show_blame_view;
4798 	view->input = input_blame_view;
4799 	view->close = close_blame_view;
4800 	view->search_start = search_start_blame_view;
4801 	view->search_next = search_next_blame_view;
4802 
4803 	return run_blame(view);
4804 }
4805 
4806 static const struct got_error *
4807 close_blame_view(struct tog_view *view)
4808 {
4809 	const struct got_error *err = NULL;
4810 	struct tog_blame_view_state *s = &view->state.blame;
4811 
4812 	if (s->blame.thread)
4813 		err = stop_blame(&s->blame);
4814 
4815 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
4816 		struct got_object_qid *blamed_commit;
4817 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
4818 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
4819 		got_object_qid_free(blamed_commit);
4820 	}
4821 
4822 	free(s->path);
4823 	free_colors(&s->colors);
4824 	return err;
4825 }
4826 
4827 static const struct got_error *
4828 search_start_blame_view(struct tog_view *view)
4829 {
4830 	struct tog_blame_view_state *s = &view->state.blame;
4831 
4832 	s->matched_line = 0;
4833 	return NULL;
4834 }
4835 
4836 static const struct got_error *
4837 search_next_blame_view(struct tog_view *view)
4838 {
4839 	struct tog_blame_view_state *s = &view->state.blame;
4840 	const struct got_error *err = NULL;
4841 	int lineno;
4842 	char *line = NULL;
4843 	size_t linesize = 0;
4844 	ssize_t linelen;
4845 
4846 	if (!view->searching) {
4847 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4848 		return NULL;
4849 	}
4850 
4851 	if (s->matched_line) {
4852 		if (view->searching == TOG_SEARCH_FORWARD)
4853 			lineno = s->matched_line + 1;
4854 		else
4855 			lineno = s->matched_line - 1;
4856 	} else
4857 		lineno = s->first_displayed_line - 1 + s->selected_line;
4858 
4859 	while (1) {
4860 		off_t offset;
4861 
4862 		if (lineno <= 0 || lineno > s->blame.nlines) {
4863 			if (s->matched_line == 0) {
4864 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4865 				break;
4866 			}
4867 
4868 			if (view->searching == TOG_SEARCH_FORWARD)
4869 				lineno = 1;
4870 			else
4871 				lineno = s->blame.nlines;
4872 		}
4873 
4874 		offset = s->blame.line_offsets[lineno - 1];
4875 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4876 			free(line);
4877 			return got_error_from_errno("fseeko");
4878 		}
4879 		linelen = getline(&line, &linesize, s->blame.f);
4880 		if (linelen != -1) {
4881 			char *exstr;
4882 			err = expand_tab(&exstr, line);
4883 			if (err)
4884 				break;
4885 			if (match_line(exstr, &view->regex, 1,
4886 			    &view->regmatch)) {
4887 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4888 				s->matched_line = lineno;
4889 				free(exstr);
4890 				break;
4891 			}
4892 			free(exstr);
4893 		}
4894 		if (view->searching == TOG_SEARCH_FORWARD)
4895 			lineno++;
4896 		else
4897 			lineno--;
4898 	}
4899 	free(line);
4900 
4901 	if (s->matched_line) {
4902 		s->first_displayed_line = s->matched_line;
4903 		s->selected_line = 1;
4904 	}
4905 
4906 	return err;
4907 }
4908 
4909 static const struct got_error *
4910 show_blame_view(struct tog_view *view)
4911 {
4912 	const struct got_error *err = NULL;
4913 	struct tog_blame_view_state *s = &view->state.blame;
4914 	int errcode;
4915 
4916 	if (s->blame.thread == 0 && !s->blame_complete) {
4917 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4918 		    &s->blame.thread_args);
4919 		if (errcode)
4920 			return got_error_set_errno(errcode, "pthread_create");
4921 
4922 		halfdelay(1); /* fast refresh while annotating  */
4923 	}
4924 
4925 	if (s->blame_complete)
4926 		halfdelay(10); /* disable fast refresh */
4927 
4928 	err = draw_blame(view);
4929 
4930 	view_vborder(view);
4931 	return err;
4932 }
4933 
4934 static const struct got_error *
4935 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
4936 {
4937 	const struct got_error *err = NULL, *thread_err = NULL;
4938 	struct tog_view *diff_view;
4939 	struct tog_blame_view_state *s = &view->state.blame;
4940 	int begin_x = 0, nscroll = view->nlines - 2;
4941 
4942 	switch (ch) {
4943 	case '0':
4944 		view->x = 0;
4945 		break;
4946 	case '$':
4947 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4948 		break;
4949 	case KEY_RIGHT:
4950 	case 'l':
4951 		if (view->x + view->ncols / 3 < view->maxx)
4952 			view->x += 2;  /* move two columns right */
4953 		break;
4954 	case KEY_LEFT:
4955 	case 'h':
4956 		view->x -= MIN(view->x, 2);  /* move two columns back */
4957 		break;
4958 	case 'q':
4959 		s->done = 1;
4960 		break;
4961 	case 'g':
4962 	case KEY_HOME:
4963 		s->selected_line = 1;
4964 		s->first_displayed_line = 1;
4965 		break;
4966 	case 'G':
4967 	case KEY_END:
4968 		if (s->blame.nlines < view->nlines - 2) {
4969 			s->selected_line = s->blame.nlines;
4970 			s->first_displayed_line = 1;
4971 		} else {
4972 			s->selected_line = view->nlines - 2;
4973 			s->first_displayed_line = s->blame.nlines -
4974 			    (view->nlines - 3);
4975 		}
4976 		break;
4977 	case 'k':
4978 	case KEY_UP:
4979 	case CTRL('p'):
4980 		if (s->selected_line > 1)
4981 			s->selected_line--;
4982 		else if (s->selected_line == 1 &&
4983 		    s->first_displayed_line > 1)
4984 			s->first_displayed_line--;
4985 		break;
4986 	case CTRL('u'):
4987 	case 'u':
4988 		nscroll /= 2;
4989 		/* FALL THROUGH */
4990 	case KEY_PPAGE:
4991 	case CTRL('b'):
4992 		if (s->first_displayed_line == 1) {
4993 			s->selected_line = MAX(1, s->selected_line - nscroll);
4994 			break;
4995 		}
4996 		if (s->first_displayed_line > nscroll)
4997 			s->first_displayed_line -= nscroll;
4998 		else
4999 			s->first_displayed_line = 1;
5000 		break;
5001 	case 'j':
5002 	case KEY_DOWN:
5003 	case CTRL('n'):
5004 		if (s->selected_line < view->nlines - 2 &&
5005 		    s->first_displayed_line +
5006 		    s->selected_line <= s->blame.nlines)
5007 			s->selected_line++;
5008 		else if (s->last_displayed_line <
5009 		    s->blame.nlines)
5010 			s->first_displayed_line++;
5011 		break;
5012 	case 'b':
5013 	case 'p': {
5014 		struct got_object_id *id = NULL;
5015 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5016 		    s->first_displayed_line, s->selected_line);
5017 		if (id == NULL)
5018 			break;
5019 		if (ch == 'p') {
5020 			struct got_commit_object *commit, *pcommit;
5021 			struct got_object_qid *pid;
5022 			struct got_object_id *blob_id = NULL;
5023 			int obj_type;
5024 			err = got_object_open_as_commit(&commit,
5025 			    s->repo, id);
5026 			if (err)
5027 				break;
5028 			pid = STAILQ_FIRST(
5029 			    got_object_commit_get_parent_ids(commit));
5030 			if (pid == NULL) {
5031 				got_object_commit_close(commit);
5032 				break;
5033 			}
5034 			/* Check if path history ends here. */
5035 			err = got_object_open_as_commit(&pcommit,
5036 			    s->repo, &pid->id);
5037 			if (err)
5038 				break;
5039 			err = got_object_id_by_path(&blob_id, s->repo,
5040 			    pcommit, s->path);
5041 			got_object_commit_close(pcommit);
5042 			if (err) {
5043 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5044 					err = NULL;
5045 				got_object_commit_close(commit);
5046 				break;
5047 			}
5048 			err = got_object_get_type(&obj_type, s->repo,
5049 			    blob_id);
5050 			free(blob_id);
5051 			/* Can't blame non-blob type objects. */
5052 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5053 				got_object_commit_close(commit);
5054 				break;
5055 			}
5056 			err = got_object_qid_alloc(&s->blamed_commit,
5057 			    &pid->id);
5058 			got_object_commit_close(commit);
5059 		} else {
5060 			if (got_object_id_cmp(id,
5061 			    &s->blamed_commit->id) == 0)
5062 				break;
5063 			err = got_object_qid_alloc(&s->blamed_commit,
5064 			    id);
5065 		}
5066 		if (err)
5067 			break;
5068 		s->done = 1;
5069 		thread_err = stop_blame(&s->blame);
5070 		s->done = 0;
5071 		if (thread_err)
5072 			break;
5073 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5074 		    s->blamed_commit, entry);
5075 		err = run_blame(view);
5076 		if (err)
5077 			break;
5078 		break;
5079 	}
5080 	case 'B': {
5081 		struct got_object_qid *first;
5082 		first = STAILQ_FIRST(&s->blamed_commits);
5083 		if (!got_object_id_cmp(&first->id, s->commit_id))
5084 			break;
5085 		s->done = 1;
5086 		thread_err = stop_blame(&s->blame);
5087 		s->done = 0;
5088 		if (thread_err)
5089 			break;
5090 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5091 		got_object_qid_free(s->blamed_commit);
5092 		s->blamed_commit =
5093 		    STAILQ_FIRST(&s->blamed_commits);
5094 		err = run_blame(view);
5095 		if (err)
5096 			break;
5097 		break;
5098 	}
5099 	case KEY_ENTER:
5100 	case '\r': {
5101 		struct got_object_id *id = NULL;
5102 		struct got_object_qid *pid;
5103 		struct got_commit_object *commit = NULL;
5104 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5105 		    s->first_displayed_line, s->selected_line);
5106 		if (id == NULL)
5107 			break;
5108 		err = got_object_open_as_commit(&commit, s->repo, id);
5109 		if (err)
5110 			break;
5111 		pid = STAILQ_FIRST(
5112 		    got_object_commit_get_parent_ids(commit));
5113 		if (view_is_parent_view(view))
5114 		    begin_x = view_split_begin_x(view->begin_x);
5115 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
5116 		if (diff_view == NULL) {
5117 			got_object_commit_close(commit);
5118 			err = got_error_from_errno("view_open");
5119 			break;
5120 		}
5121 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
5122 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
5123 		got_object_commit_close(commit);
5124 		if (err) {
5125 			view_close(diff_view);
5126 			break;
5127 		}
5128 		view->focussed = 0;
5129 		diff_view->focussed = 1;
5130 		if (view_is_parent_view(view)) {
5131 			err = view_close_child(view);
5132 			if (err)
5133 				break;
5134 			err = view_set_child(view, diff_view);
5135 			if (err)
5136 				break;
5137 			view->focus_child = 1;
5138 		} else
5139 			*new_view = diff_view;
5140 		if (err)
5141 			break;
5142 		break;
5143 	}
5144 	case CTRL('d'):
5145 	case 'd':
5146 		nscroll /= 2;
5147 		/* FALL THROUGH */
5148 	case KEY_NPAGE:
5149 	case CTRL('f'):
5150 	case ' ':
5151 		if (s->last_displayed_line >= s->blame.nlines &&
5152 		    s->selected_line >= MIN(s->blame.nlines,
5153 		    view->nlines - 2)) {
5154 			break;
5155 		}
5156 		if (s->last_displayed_line >= s->blame.nlines &&
5157 		    s->selected_line < view->nlines - 2) {
5158 			s->selected_line +=
5159 			    MIN(nscroll, s->last_displayed_line -
5160 			    s->first_displayed_line - s->selected_line + 1);
5161 		}
5162 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
5163 			s->first_displayed_line += nscroll;
5164 		else
5165 			s->first_displayed_line =
5166 			    s->blame.nlines - (view->nlines - 3);
5167 		break;
5168 	case KEY_RESIZE:
5169 		if (s->selected_line > view->nlines - 2) {
5170 			s->selected_line = MIN(s->blame.nlines,
5171 			    view->nlines - 2);
5172 		}
5173 		break;
5174 	default:
5175 		break;
5176 	}
5177 	return thread_err ? thread_err : err;
5178 }
5179 
5180 static const struct got_error *
5181 cmd_blame(int argc, char *argv[])
5182 {
5183 	const struct got_error *error;
5184 	struct got_repository *repo = NULL;
5185 	struct got_worktree *worktree = NULL;
5186 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5187 	char *link_target = NULL;
5188 	struct got_object_id *commit_id = NULL;
5189 	struct got_commit_object *commit = NULL;
5190 	char *commit_id_str = NULL;
5191 	int ch;
5192 	struct tog_view *view;
5193 	int *pack_fds = NULL;
5194 
5195 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5196 		switch (ch) {
5197 		case 'c':
5198 			commit_id_str = optarg;
5199 			break;
5200 		case 'r':
5201 			repo_path = realpath(optarg, NULL);
5202 			if (repo_path == NULL)
5203 				return got_error_from_errno2("realpath",
5204 				    optarg);
5205 			break;
5206 		default:
5207 			usage_blame();
5208 			/* NOTREACHED */
5209 		}
5210 	}
5211 
5212 	argc -= optind;
5213 	argv += optind;
5214 
5215 	if (argc != 1)
5216 		usage_blame();
5217 
5218 	error = got_repo_pack_fds_open(&pack_fds);
5219 	if (error != NULL)
5220 		goto done;
5221 
5222 	if (repo_path == NULL) {
5223 		cwd = getcwd(NULL, 0);
5224 		if (cwd == NULL)
5225 			return got_error_from_errno("getcwd");
5226 		error = got_worktree_open(&worktree, cwd);
5227 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5228 			goto done;
5229 		if (worktree)
5230 			repo_path =
5231 			    strdup(got_worktree_get_repo_path(worktree));
5232 		else
5233 			repo_path = strdup(cwd);
5234 		if (repo_path == NULL) {
5235 			error = got_error_from_errno("strdup");
5236 			goto done;
5237 		}
5238 	}
5239 
5240 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5241 	if (error != NULL)
5242 		goto done;
5243 
5244 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
5245 	    worktree);
5246 	if (error)
5247 		goto done;
5248 
5249 	init_curses();
5250 
5251 	error = apply_unveil(got_repo_get_path(repo), NULL);
5252 	if (error)
5253 		goto done;
5254 
5255 	error = tog_load_refs(repo, 0);
5256 	if (error)
5257 		goto done;
5258 
5259 	if (commit_id_str == NULL) {
5260 		struct got_reference *head_ref;
5261 		error = got_ref_open(&head_ref, repo, worktree ?
5262 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
5263 		if (error != NULL)
5264 			goto done;
5265 		error = got_ref_resolve(&commit_id, repo, head_ref);
5266 		got_ref_close(head_ref);
5267 	} else {
5268 		error = got_repo_match_object_id(&commit_id, NULL,
5269 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
5270 	}
5271 	if (error != NULL)
5272 		goto done;
5273 
5274 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
5275 	if (view == NULL) {
5276 		error = got_error_from_errno("view_open");
5277 		goto done;
5278 	}
5279 
5280 	error = got_object_open_as_commit(&commit, repo, commit_id);
5281 	if (error)
5282 		goto done;
5283 
5284 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
5285 	    commit, repo);
5286 	if (error)
5287 		goto done;
5288 
5289 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
5290 	    commit_id, repo);
5291 	if (error)
5292 		goto done;
5293 	if (worktree) {
5294 		/* Release work tree lock. */
5295 		got_worktree_close(worktree);
5296 		worktree = NULL;
5297 	}
5298 	error = view_loop(view);
5299 done:
5300 	free(repo_path);
5301 	free(in_repo_path);
5302 	free(link_target);
5303 	free(cwd);
5304 	free(commit_id);
5305 	if (commit)
5306 		got_object_commit_close(commit);
5307 	if (worktree)
5308 		got_worktree_close(worktree);
5309 	if (repo) {
5310 		const struct got_error *close_err = got_repo_close(repo);
5311 		if (error == NULL)
5312 			error = close_err;
5313 	}
5314 	if (pack_fds) {
5315 		const struct got_error *pack_err =
5316 		    got_repo_pack_fds_close(pack_fds);
5317 		if (error == NULL)
5318 			error = pack_err;
5319 	}
5320 	tog_free_refs();
5321 	return error;
5322 }
5323 
5324 static const struct got_error *
5325 draw_tree_entries(struct tog_view *view, const char *parent_path)
5326 {
5327 	struct tog_tree_view_state *s = &view->state.tree;
5328 	const struct got_error *err = NULL;
5329 	struct got_tree_entry *te;
5330 	wchar_t *wline;
5331 	struct tog_color *tc;
5332 	int width, n, i, nentries;
5333 	int limit = view->nlines;
5334 
5335 	s->ndisplayed = 0;
5336 
5337 	werase(view->window);
5338 
5339 	if (limit == 0)
5340 		return NULL;
5341 
5342 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
5343 	    0, 0);
5344 	if (err)
5345 		return err;
5346 	if (view_needs_focus_indication(view))
5347 		wstandout(view->window);
5348 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5349 	if (tc)
5350 		wattr_on(view->window,
5351 		    COLOR_PAIR(tc->colorpair), NULL);
5352 	waddwstr(view->window, wline);
5353 	if (tc)
5354 		wattr_off(view->window,
5355 		    COLOR_PAIR(tc->colorpair), NULL);
5356 	if (view_needs_focus_indication(view))
5357 		wstandend(view->window);
5358 	free(wline);
5359 	wline = NULL;
5360 	if (width < view->ncols - 1)
5361 		waddch(view->window, '\n');
5362 	if (--limit <= 0)
5363 		return NULL;
5364 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
5365 	    0, 0);
5366 	if (err)
5367 		return err;
5368 	waddwstr(view->window, wline);
5369 	free(wline);
5370 	wline = NULL;
5371 	if (width < view->ncols - 1)
5372 		waddch(view->window, '\n');
5373 	if (--limit <= 0)
5374 		return NULL;
5375 	waddch(view->window, '\n');
5376 	if (--limit <= 0)
5377 		return NULL;
5378 
5379 	if (s->first_displayed_entry == NULL) {
5380 		te = got_object_tree_get_first_entry(s->tree);
5381 		if (s->selected == 0) {
5382 			if (view->focussed)
5383 				wstandout(view->window);
5384 			s->selected_entry = NULL;
5385 		}
5386 		waddstr(view->window, "  ..\n");	/* parent directory */
5387 		if (s->selected == 0 && view->focussed)
5388 			wstandend(view->window);
5389 		s->ndisplayed++;
5390 		if (--limit <= 0)
5391 			return NULL;
5392 		n = 1;
5393 	} else {
5394 		n = 0;
5395 		te = s->first_displayed_entry;
5396 	}
5397 
5398 	nentries = got_object_tree_get_nentries(s->tree);
5399 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
5400 		char *line = NULL, *id_str = NULL, *link_target = NULL;
5401 		const char *modestr = "";
5402 		mode_t mode;
5403 
5404 		te = got_object_tree_get_entry(s->tree, i);
5405 		mode = got_tree_entry_get_mode(te);
5406 
5407 		if (s->show_ids) {
5408 			err = got_object_id_str(&id_str,
5409 			    got_tree_entry_get_id(te));
5410 			if (err)
5411 				return got_error_from_errno(
5412 				    "got_object_id_str");
5413 		}
5414 		if (got_object_tree_entry_is_submodule(te))
5415 			modestr = "$";
5416 		else if (S_ISLNK(mode)) {
5417 			int i;
5418 
5419 			err = got_tree_entry_get_symlink_target(&link_target,
5420 			    te, s->repo);
5421 			if (err) {
5422 				free(id_str);
5423 				return err;
5424 			}
5425 			for (i = 0; i < strlen(link_target); i++) {
5426 				if (!isprint((unsigned char)link_target[i]))
5427 					link_target[i] = '?';
5428 			}
5429 			modestr = "@";
5430 		}
5431 		else if (S_ISDIR(mode))
5432 			modestr = "/";
5433 		else if (mode & S_IXUSR)
5434 			modestr = "*";
5435 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
5436 		    got_tree_entry_get_name(te), modestr,
5437 		    link_target ? " -> ": "",
5438 		    link_target ? link_target : "") == -1) {
5439 			free(id_str);
5440 			free(link_target);
5441 			return got_error_from_errno("asprintf");
5442 		}
5443 		free(id_str);
5444 		free(link_target);
5445 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
5446 		    0, 0);
5447 		if (err) {
5448 			free(line);
5449 			break;
5450 		}
5451 		if (n == s->selected) {
5452 			if (view->focussed)
5453 				wstandout(view->window);
5454 			s->selected_entry = te;
5455 		}
5456 		tc = match_color(&s->colors, line);
5457 		if (tc)
5458 			wattr_on(view->window,
5459 			    COLOR_PAIR(tc->colorpair), NULL);
5460 		waddwstr(view->window, wline);
5461 		if (tc)
5462 			wattr_off(view->window,
5463 			    COLOR_PAIR(tc->colorpair), NULL);
5464 		if (width < view->ncols - 1)
5465 			waddch(view->window, '\n');
5466 		if (n == s->selected && view->focussed)
5467 			wstandend(view->window);
5468 		free(line);
5469 		free(wline);
5470 		wline = NULL;
5471 		n++;
5472 		s->ndisplayed++;
5473 		s->last_displayed_entry = te;
5474 		if (--limit <= 0)
5475 			break;
5476 	}
5477 
5478 	return err;
5479 }
5480 
5481 static void
5482 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
5483 {
5484 	struct got_tree_entry *te;
5485 	int isroot = s->tree == s->root;
5486 	int i = 0;
5487 
5488 	if (s->first_displayed_entry == NULL)
5489 		return;
5490 
5491 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
5492 	while (i++ < maxscroll) {
5493 		if (te == NULL) {
5494 			if (!isroot)
5495 				s->first_displayed_entry = NULL;
5496 			break;
5497 		}
5498 		s->first_displayed_entry = te;
5499 		te = got_tree_entry_get_prev(s->tree, te);
5500 	}
5501 }
5502 
5503 static void
5504 tree_scroll_down(struct tog_tree_view_state *s, int maxscroll)
5505 {
5506 	struct got_tree_entry *next, *last;
5507 	int n = 0;
5508 
5509 	if (s->first_displayed_entry)
5510 		next = got_tree_entry_get_next(s->tree,
5511 		    s->first_displayed_entry);
5512 	else
5513 		next = got_object_tree_get_first_entry(s->tree);
5514 
5515 	last = s->last_displayed_entry;
5516 	while (next && last && n++ < maxscroll) {
5517 		last = got_tree_entry_get_next(s->tree, last);
5518 		if (last) {
5519 			s->first_displayed_entry = next;
5520 			next = got_tree_entry_get_next(s->tree, next);
5521 		}
5522 	}
5523 }
5524 
5525 static const struct got_error *
5526 tree_entry_path(char **path, struct tog_parent_trees *parents,
5527     struct got_tree_entry *te)
5528 {
5529 	const struct got_error *err = NULL;
5530 	struct tog_parent_tree *pt;
5531 	size_t len = 2; /* for leading slash and NUL */
5532 
5533 	TAILQ_FOREACH(pt, parents, entry)
5534 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5535 		    + 1 /* slash */;
5536 	if (te)
5537 		len += strlen(got_tree_entry_get_name(te));
5538 
5539 	*path = calloc(1, len);
5540 	if (path == NULL)
5541 		return got_error_from_errno("calloc");
5542 
5543 	(*path)[0] = '/';
5544 	pt = TAILQ_LAST(parents, tog_parent_trees);
5545 	while (pt) {
5546 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5547 		if (strlcat(*path, name, len) >= len) {
5548 			err = got_error(GOT_ERR_NO_SPACE);
5549 			goto done;
5550 		}
5551 		if (strlcat(*path, "/", len) >= len) {
5552 			err = got_error(GOT_ERR_NO_SPACE);
5553 			goto done;
5554 		}
5555 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5556 	}
5557 	if (te) {
5558 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5559 			err = got_error(GOT_ERR_NO_SPACE);
5560 			goto done;
5561 		}
5562 	}
5563 done:
5564 	if (err) {
5565 		free(*path);
5566 		*path = NULL;
5567 	}
5568 	return err;
5569 }
5570 
5571 static const struct got_error *
5572 blame_tree_entry(struct tog_view **new_view, int begin_x,
5573     struct got_tree_entry *te, struct tog_parent_trees *parents,
5574     struct got_object_id *commit_id, struct got_repository *repo)
5575 {
5576 	const struct got_error *err = NULL;
5577 	char *path;
5578 	struct tog_view *blame_view;
5579 
5580 	*new_view = NULL;
5581 
5582 	err = tree_entry_path(&path, parents, te);
5583 	if (err)
5584 		return err;
5585 
5586 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5587 	if (blame_view == NULL) {
5588 		err = got_error_from_errno("view_open");
5589 		goto done;
5590 	}
5591 
5592 	err = open_blame_view(blame_view, path, commit_id, repo);
5593 	if (err) {
5594 		if (err->code == GOT_ERR_CANCELLED)
5595 			err = NULL;
5596 		view_close(blame_view);
5597 	} else
5598 		*new_view = blame_view;
5599 done:
5600 	free(path);
5601 	return err;
5602 }
5603 
5604 static const struct got_error *
5605 log_selected_tree_entry(struct tog_view **new_view, int begin_x,
5606     struct tog_tree_view_state *s)
5607 {
5608 	struct tog_view *log_view;
5609 	const struct got_error *err = NULL;
5610 	char *path;
5611 
5612 	*new_view = NULL;
5613 
5614 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5615 	if (log_view == NULL)
5616 		return got_error_from_errno("view_open");
5617 
5618 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
5619 	if (err)
5620 		return err;
5621 
5622 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
5623 	    path, 0);
5624 	if (err)
5625 		view_close(log_view);
5626 	else
5627 		*new_view = log_view;
5628 	free(path);
5629 	return err;
5630 }
5631 
5632 static const struct got_error *
5633 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
5634     const char *head_ref_name, struct got_repository *repo)
5635 {
5636 	const struct got_error *err = NULL;
5637 	char *commit_id_str = NULL;
5638 	struct tog_tree_view_state *s = &view->state.tree;
5639 	struct got_commit_object *commit = NULL;
5640 
5641 	TAILQ_INIT(&s->parents);
5642 	STAILQ_INIT(&s->colors);
5643 
5644 	s->commit_id = got_object_id_dup(commit_id);
5645 	if (s->commit_id == NULL)
5646 		return got_error_from_errno("got_object_id_dup");
5647 
5648 	err = got_object_open_as_commit(&commit, repo, commit_id);
5649 	if (err)
5650 		goto done;
5651 
5652 	/*
5653 	 * The root is opened here and will be closed when the view is closed.
5654 	 * Any visited subtrees and their path-wise parents are opened and
5655 	 * closed on demand.
5656 	 */
5657 	err = got_object_open_as_tree(&s->root, repo,
5658 	    got_object_commit_get_tree_id(commit));
5659 	if (err)
5660 		goto done;
5661 	s->tree = s->root;
5662 
5663 	err = got_object_id_str(&commit_id_str, commit_id);
5664 	if (err != NULL)
5665 		goto done;
5666 
5667 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5668 		err = got_error_from_errno("asprintf");
5669 		goto done;
5670 	}
5671 
5672 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5673 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5674 	if (head_ref_name) {
5675 		s->head_ref_name = strdup(head_ref_name);
5676 		if (s->head_ref_name == NULL) {
5677 			err = got_error_from_errno("strdup");
5678 			goto done;
5679 		}
5680 	}
5681 	s->repo = repo;
5682 
5683 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5684 		err = add_color(&s->colors, "\\$$",
5685 		    TOG_COLOR_TREE_SUBMODULE,
5686 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5687 		if (err)
5688 			goto done;
5689 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5690 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5691 		if (err)
5692 			goto done;
5693 		err = add_color(&s->colors, "/$",
5694 		    TOG_COLOR_TREE_DIRECTORY,
5695 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5696 		if (err)
5697 			goto done;
5698 
5699 		err = add_color(&s->colors, "\\*$",
5700 		    TOG_COLOR_TREE_EXECUTABLE,
5701 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5702 		if (err)
5703 			goto done;
5704 
5705 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5706 		    get_color_value("TOG_COLOR_COMMIT"));
5707 		if (err)
5708 			goto done;
5709 	}
5710 
5711 	view->show = show_tree_view;
5712 	view->input = input_tree_view;
5713 	view->close = close_tree_view;
5714 	view->search_start = search_start_tree_view;
5715 	view->search_next = search_next_tree_view;
5716 done:
5717 	free(commit_id_str);
5718 	if (commit)
5719 		got_object_commit_close(commit);
5720 	if (err)
5721 		close_tree_view(view);
5722 	return err;
5723 }
5724 
5725 static const struct got_error *
5726 close_tree_view(struct tog_view *view)
5727 {
5728 	struct tog_tree_view_state *s = &view->state.tree;
5729 
5730 	free_colors(&s->colors);
5731 	free(s->tree_label);
5732 	s->tree_label = NULL;
5733 	free(s->commit_id);
5734 	s->commit_id = NULL;
5735 	free(s->head_ref_name);
5736 	s->head_ref_name = NULL;
5737 	while (!TAILQ_EMPTY(&s->parents)) {
5738 		struct tog_parent_tree *parent;
5739 		parent = TAILQ_FIRST(&s->parents);
5740 		TAILQ_REMOVE(&s->parents, parent, entry);
5741 		if (parent->tree != s->root)
5742 			got_object_tree_close(parent->tree);
5743 		free(parent);
5744 
5745 	}
5746 	if (s->tree != NULL && s->tree != s->root)
5747 		got_object_tree_close(s->tree);
5748 	if (s->root)
5749 		got_object_tree_close(s->root);
5750 	return NULL;
5751 }
5752 
5753 static const struct got_error *
5754 search_start_tree_view(struct tog_view *view)
5755 {
5756 	struct tog_tree_view_state *s = &view->state.tree;
5757 
5758 	s->matched_entry = NULL;
5759 	return NULL;
5760 }
5761 
5762 static int
5763 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5764 {
5765 	regmatch_t regmatch;
5766 
5767 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5768 	    0) == 0;
5769 }
5770 
5771 static const struct got_error *
5772 search_next_tree_view(struct tog_view *view)
5773 {
5774 	struct tog_tree_view_state *s = &view->state.tree;
5775 	struct got_tree_entry *te = NULL;
5776 
5777 	if (!view->searching) {
5778 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5779 		return NULL;
5780 	}
5781 
5782 	if (s->matched_entry) {
5783 		if (view->searching == TOG_SEARCH_FORWARD) {
5784 			if (s->selected_entry)
5785 				te = got_tree_entry_get_next(s->tree,
5786 				    s->selected_entry);
5787 			else
5788 				te = got_object_tree_get_first_entry(s->tree);
5789 		} else {
5790 			if (s->selected_entry == NULL)
5791 				te = got_object_tree_get_last_entry(s->tree);
5792 			else
5793 				te = got_tree_entry_get_prev(s->tree,
5794 				    s->selected_entry);
5795 		}
5796 	} else {
5797 		if (s->selected_entry)
5798 			te = s->selected_entry;
5799 		else if (view->searching == TOG_SEARCH_FORWARD)
5800 			te = got_object_tree_get_first_entry(s->tree);
5801 		else
5802 			te = got_object_tree_get_last_entry(s->tree);
5803 	}
5804 
5805 	while (1) {
5806 		if (te == NULL) {
5807 			if (s->matched_entry == NULL) {
5808 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5809 				return NULL;
5810 			}
5811 			if (view->searching == TOG_SEARCH_FORWARD)
5812 				te = got_object_tree_get_first_entry(s->tree);
5813 			else
5814 				te = got_object_tree_get_last_entry(s->tree);
5815 		}
5816 
5817 		if (match_tree_entry(te, &view->regex)) {
5818 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5819 			s->matched_entry = te;
5820 			break;
5821 		}
5822 
5823 		if (view->searching == TOG_SEARCH_FORWARD)
5824 			te = got_tree_entry_get_next(s->tree, te);
5825 		else
5826 			te = got_tree_entry_get_prev(s->tree, te);
5827 	}
5828 
5829 	if (s->matched_entry) {
5830 		s->first_displayed_entry = s->matched_entry;
5831 		s->selected = 0;
5832 	}
5833 
5834 	return NULL;
5835 }
5836 
5837 static const struct got_error *
5838 show_tree_view(struct tog_view *view)
5839 {
5840 	const struct got_error *err = NULL;
5841 	struct tog_tree_view_state *s = &view->state.tree;
5842 	char *parent_path;
5843 
5844 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5845 	if (err)
5846 		return err;
5847 
5848 	err = draw_tree_entries(view, parent_path);
5849 	free(parent_path);
5850 
5851 	view_vborder(view);
5852 	return err;
5853 }
5854 
5855 static const struct got_error *
5856 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
5857 {
5858 	const struct got_error *err = NULL;
5859 	struct tog_tree_view_state *s = &view->state.tree;
5860 	struct tog_view *log_view, *ref_view;
5861 	struct got_tree_entry *te;
5862 	int begin_x = 0, n, nscroll = view->nlines - 3;
5863 
5864 	switch (ch) {
5865 	case 'i':
5866 		s->show_ids = !s->show_ids;
5867 		break;
5868 	case 'l':
5869 		if (!s->selected_entry)
5870 			break;
5871 		if (view_is_parent_view(view))
5872 			begin_x = view_split_begin_x(view->begin_x);
5873 		err = log_selected_tree_entry(&log_view, begin_x, s);
5874 		view->focussed = 0;
5875 		log_view->focussed = 1;
5876 		if (view_is_parent_view(view)) {
5877 			err = view_close_child(view);
5878 			if (err)
5879 				return err;
5880 			err = view_set_child(view, log_view);
5881 			if (err)
5882 				return err;
5883 			view->focus_child = 1;
5884 		} else
5885 			*new_view = log_view;
5886 		break;
5887 	case 'r':
5888 		if (view_is_parent_view(view))
5889 			begin_x = view_split_begin_x(view->begin_x);
5890 		ref_view = view_open(view->nlines, view->ncols,
5891 		    view->begin_y, begin_x, TOG_VIEW_REF);
5892 		if (ref_view == NULL)
5893 			return got_error_from_errno("view_open");
5894 		err = open_ref_view(ref_view, s->repo);
5895 		if (err) {
5896 			view_close(ref_view);
5897 			return err;
5898 		}
5899 		view->focussed = 0;
5900 		ref_view->focussed = 1;
5901 		if (view_is_parent_view(view)) {
5902 			err = view_close_child(view);
5903 			if (err)
5904 				return err;
5905 			err = view_set_child(view, ref_view);
5906 			if (err)
5907 				return err;
5908 			view->focus_child = 1;
5909 		} else
5910 			*new_view = ref_view;
5911 		break;
5912 	case 'g':
5913 	case KEY_HOME:
5914 		s->selected = 0;
5915 		if (s->tree == s->root)
5916 			s->first_displayed_entry =
5917 			    got_object_tree_get_first_entry(s->tree);
5918 		else
5919 			s->first_displayed_entry = NULL;
5920 		break;
5921 	case 'G':
5922 	case KEY_END:
5923 		s->selected = 0;
5924 		te = got_object_tree_get_last_entry(s->tree);
5925 		for (n = 0; n < view->nlines - 3; n++) {
5926 			if (te == NULL) {
5927 				if(s->tree != s->root) {
5928 					s->first_displayed_entry = NULL;
5929 					n++;
5930 				}
5931 				break;
5932 			}
5933 			s->first_displayed_entry = te;
5934 			te = got_tree_entry_get_prev(s->tree, te);
5935 		}
5936 		if (n > 0)
5937 			s->selected = n - 1;
5938 		break;
5939 	case 'k':
5940 	case KEY_UP:
5941 	case CTRL('p'):
5942 		if (s->selected > 0) {
5943 			s->selected--;
5944 			break;
5945 		}
5946 		tree_scroll_up(s, 1);
5947 		break;
5948 	case CTRL('u'):
5949 	case 'u':
5950 		nscroll /= 2;
5951 		/* FALL THROUGH */
5952 	case KEY_PPAGE:
5953 	case CTRL('b'):
5954 		if (s->tree == s->root) {
5955 			if (got_object_tree_get_first_entry(s->tree) ==
5956 			    s->first_displayed_entry)
5957 				s->selected -= MIN(s->selected, nscroll);
5958 		} else {
5959 			if (s->first_displayed_entry == NULL)
5960 				s->selected -= MIN(s->selected, nscroll);
5961 		}
5962 		tree_scroll_up(s, MAX(0, nscroll));
5963 		break;
5964 	case 'j':
5965 	case KEY_DOWN:
5966 	case CTRL('n'):
5967 		if (s->selected < s->ndisplayed - 1) {
5968 			s->selected++;
5969 			break;
5970 		}
5971 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5972 		    == NULL)
5973 			/* can't scroll any further */
5974 			break;
5975 		tree_scroll_down(s, 1);
5976 		break;
5977 	case CTRL('d'):
5978 	case 'd':
5979 		nscroll /= 2;
5980 		/* FALL THROUGH */
5981 	case KEY_NPAGE:
5982 	case CTRL('f'):
5983 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5984 		    == NULL) {
5985 			/* can't scroll any further; move cursor down */
5986 			if (s->selected < s->ndisplayed - 1)
5987 				s->selected += MIN(nscroll,
5988 				    s->ndisplayed - s->selected - 1);
5989 			break;
5990 		}
5991 		tree_scroll_down(s, nscroll);
5992 		break;
5993 	case KEY_ENTER:
5994 	case '\r':
5995 	case KEY_BACKSPACE:
5996 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5997 			struct tog_parent_tree *parent;
5998 			/* user selected '..' */
5999 			if (s->tree == s->root)
6000 				break;
6001 			parent = TAILQ_FIRST(&s->parents);
6002 			TAILQ_REMOVE(&s->parents, parent,
6003 			    entry);
6004 			got_object_tree_close(s->tree);
6005 			s->tree = parent->tree;
6006 			s->first_displayed_entry =
6007 			    parent->first_displayed_entry;
6008 			s->selected_entry =
6009 			    parent->selected_entry;
6010 			s->selected = parent->selected;
6011 			free(parent);
6012 		} else if (S_ISDIR(got_tree_entry_get_mode(
6013 		    s->selected_entry))) {
6014 			struct got_tree_object *subtree;
6015 			err = got_object_open_as_tree(&subtree, s->repo,
6016 			    got_tree_entry_get_id(s->selected_entry));
6017 			if (err)
6018 				break;
6019 			err = tree_view_visit_subtree(s, subtree);
6020 			if (err) {
6021 				got_object_tree_close(subtree);
6022 				break;
6023 			}
6024 		} else if (S_ISREG(got_tree_entry_get_mode(
6025 		    s->selected_entry))) {
6026 			struct tog_view *blame_view;
6027 			int begin_x = view_is_parent_view(view) ?
6028 			    view_split_begin_x(view->begin_x) : 0;
6029 
6030 			err = blame_tree_entry(&blame_view, begin_x,
6031 			    s->selected_entry, &s->parents,
6032 			    s->commit_id, s->repo);
6033 			if (err)
6034 				break;
6035 			view->focussed = 0;
6036 			blame_view->focussed = 1;
6037 			if (view_is_parent_view(view)) {
6038 				err = view_close_child(view);
6039 				if (err)
6040 					return err;
6041 				err = view_set_child(view, blame_view);
6042 				if (err)
6043 					return err;
6044 				view->focus_child = 1;
6045 			} else
6046 				*new_view = blame_view;
6047 		}
6048 		break;
6049 	case KEY_RESIZE:
6050 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
6051 			s->selected = view->nlines - 4;
6052 		break;
6053 	default:
6054 		break;
6055 	}
6056 
6057 	return err;
6058 }
6059 
6060 __dead static void
6061 usage_tree(void)
6062 {
6063 	endwin();
6064 	fprintf(stderr,
6065 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
6066 	    getprogname());
6067 	exit(1);
6068 }
6069 
6070 static const struct got_error *
6071 cmd_tree(int argc, char *argv[])
6072 {
6073 	const struct got_error *error;
6074 	struct got_repository *repo = NULL;
6075 	struct got_worktree *worktree = NULL;
6076 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6077 	struct got_object_id *commit_id = NULL;
6078 	struct got_commit_object *commit = NULL;
6079 	const char *commit_id_arg = NULL;
6080 	char *label = NULL;
6081 	struct got_reference *ref = NULL;
6082 	const char *head_ref_name = NULL;
6083 	int ch;
6084 	struct tog_view *view;
6085 	int *pack_fds = NULL;
6086 
6087 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6088 		switch (ch) {
6089 		case 'c':
6090 			commit_id_arg = optarg;
6091 			break;
6092 		case 'r':
6093 			repo_path = realpath(optarg, NULL);
6094 			if (repo_path == NULL)
6095 				return got_error_from_errno2("realpath",
6096 				    optarg);
6097 			break;
6098 		default:
6099 			usage_tree();
6100 			/* NOTREACHED */
6101 		}
6102 	}
6103 
6104 	argc -= optind;
6105 	argv += optind;
6106 
6107 	if (argc > 1)
6108 		usage_tree();
6109 
6110 	error = got_repo_pack_fds_open(&pack_fds);
6111 	if (error != NULL)
6112 		goto done;
6113 
6114 	if (repo_path == NULL) {
6115 		cwd = getcwd(NULL, 0);
6116 		if (cwd == NULL)
6117 			return got_error_from_errno("getcwd");
6118 		error = got_worktree_open(&worktree, cwd);
6119 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6120 			goto done;
6121 		if (worktree)
6122 			repo_path =
6123 			    strdup(got_worktree_get_repo_path(worktree));
6124 		else
6125 			repo_path = strdup(cwd);
6126 		if (repo_path == NULL) {
6127 			error = got_error_from_errno("strdup");
6128 			goto done;
6129 		}
6130 	}
6131 
6132 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6133 	if (error != NULL)
6134 		goto done;
6135 
6136 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6137 	    repo, worktree);
6138 	if (error)
6139 		goto done;
6140 
6141 	init_curses();
6142 
6143 	error = apply_unveil(got_repo_get_path(repo), NULL);
6144 	if (error)
6145 		goto done;
6146 
6147 	error = tog_load_refs(repo, 0);
6148 	if (error)
6149 		goto done;
6150 
6151 	if (commit_id_arg == NULL) {
6152 		error = got_repo_match_object_id(&commit_id, &label,
6153 		    worktree ? got_worktree_get_head_ref_name(worktree) :
6154 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6155 		if (error)
6156 			goto done;
6157 		head_ref_name = label;
6158 	} else {
6159 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
6160 		if (error == NULL)
6161 			head_ref_name = got_ref_get_name(ref);
6162 		else if (error->code != GOT_ERR_NOT_REF)
6163 			goto done;
6164 		error = got_repo_match_object_id(&commit_id, NULL,
6165 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6166 		if (error)
6167 			goto done;
6168 	}
6169 
6170 	error = got_object_open_as_commit(&commit, repo, commit_id);
6171 	if (error)
6172 		goto done;
6173 
6174 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
6175 	if (view == NULL) {
6176 		error = got_error_from_errno("view_open");
6177 		goto done;
6178 	}
6179 	error = open_tree_view(view, commit_id, head_ref_name, repo);
6180 	if (error)
6181 		goto done;
6182 	if (!got_path_is_root_dir(in_repo_path)) {
6183 		error = tree_view_walk_path(&view->state.tree, commit,
6184 		    in_repo_path);
6185 		if (error)
6186 			goto done;
6187 	}
6188 
6189 	if (worktree) {
6190 		/* Release work tree lock. */
6191 		got_worktree_close(worktree);
6192 		worktree = NULL;
6193 	}
6194 	error = view_loop(view);
6195 done:
6196 	free(repo_path);
6197 	free(cwd);
6198 	free(commit_id);
6199 	free(label);
6200 	if (ref)
6201 		got_ref_close(ref);
6202 	if (repo) {
6203 		const struct got_error *close_err = got_repo_close(repo);
6204 		if (error == NULL)
6205 			error = close_err;
6206 	}
6207 	if (pack_fds) {
6208 		const struct got_error *pack_err =
6209 		    got_repo_pack_fds_close(pack_fds);
6210 		if (error == NULL)
6211 			error = pack_err;
6212 	}
6213 	tog_free_refs();
6214 	return error;
6215 }
6216 
6217 static const struct got_error *
6218 ref_view_load_refs(struct tog_ref_view_state *s)
6219 {
6220 	struct got_reflist_entry *sre;
6221 	struct tog_reflist_entry *re;
6222 
6223 	s->nrefs = 0;
6224 	TAILQ_FOREACH(sre, &tog_refs, entry) {
6225 		if (strncmp(got_ref_get_name(sre->ref),
6226 		    "refs/got/", 9) == 0 &&
6227 		    strncmp(got_ref_get_name(sre->ref),
6228 		    "refs/got/backup/", 16) != 0)
6229 			continue;
6230 
6231 		re = malloc(sizeof(*re));
6232 		if (re == NULL)
6233 			return got_error_from_errno("malloc");
6234 
6235 		re->ref = got_ref_dup(sre->ref);
6236 		if (re->ref == NULL)
6237 			return got_error_from_errno("got_ref_dup");
6238 		re->idx = s->nrefs++;
6239 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
6240 	}
6241 
6242 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6243 	return NULL;
6244 }
6245 
6246 void
6247 ref_view_free_refs(struct tog_ref_view_state *s)
6248 {
6249 	struct tog_reflist_entry *re;
6250 
6251 	while (!TAILQ_EMPTY(&s->refs)) {
6252 		re = TAILQ_FIRST(&s->refs);
6253 		TAILQ_REMOVE(&s->refs, re, entry);
6254 		got_ref_close(re->ref);
6255 		free(re);
6256 	}
6257 }
6258 
6259 static const struct got_error *
6260 open_ref_view(struct tog_view *view, struct got_repository *repo)
6261 {
6262 	const struct got_error *err = NULL;
6263 	struct tog_ref_view_state *s = &view->state.ref;
6264 
6265 	s->selected_entry = 0;
6266 	s->repo = repo;
6267 
6268 	TAILQ_INIT(&s->refs);
6269 	STAILQ_INIT(&s->colors);
6270 
6271 	err = ref_view_load_refs(s);
6272 	if (err)
6273 		return err;
6274 
6275 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6276 		err = add_color(&s->colors, "^refs/heads/",
6277 		    TOG_COLOR_REFS_HEADS,
6278 		    get_color_value("TOG_COLOR_REFS_HEADS"));
6279 		if (err)
6280 			goto done;
6281 
6282 		err = add_color(&s->colors, "^refs/tags/",
6283 		    TOG_COLOR_REFS_TAGS,
6284 		    get_color_value("TOG_COLOR_REFS_TAGS"));
6285 		if (err)
6286 			goto done;
6287 
6288 		err = add_color(&s->colors, "^refs/remotes/",
6289 		    TOG_COLOR_REFS_REMOTES,
6290 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
6291 		if (err)
6292 			goto done;
6293 
6294 		err = add_color(&s->colors, "^refs/got/backup/",
6295 		    TOG_COLOR_REFS_BACKUP,
6296 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
6297 		if (err)
6298 			goto done;
6299 	}
6300 
6301 	view->show = show_ref_view;
6302 	view->input = input_ref_view;
6303 	view->close = close_ref_view;
6304 	view->search_start = search_start_ref_view;
6305 	view->search_next = search_next_ref_view;
6306 done:
6307 	if (err)
6308 		free_colors(&s->colors);
6309 	return err;
6310 }
6311 
6312 static const struct got_error *
6313 close_ref_view(struct tog_view *view)
6314 {
6315 	struct tog_ref_view_state *s = &view->state.ref;
6316 
6317 	ref_view_free_refs(s);
6318 	free_colors(&s->colors);
6319 
6320 	return NULL;
6321 }
6322 
6323 static const struct got_error *
6324 resolve_reflist_entry(struct got_object_id **commit_id,
6325     struct tog_reflist_entry *re, struct got_repository *repo)
6326 {
6327 	const struct got_error *err = NULL;
6328 	struct got_object_id *obj_id;
6329 	struct got_tag_object *tag = NULL;
6330 	int obj_type;
6331 
6332 	*commit_id = NULL;
6333 
6334 	err = got_ref_resolve(&obj_id, repo, re->ref);
6335 	if (err)
6336 		return err;
6337 
6338 	err = got_object_get_type(&obj_type, repo, obj_id);
6339 	if (err)
6340 		goto done;
6341 
6342 	switch (obj_type) {
6343 	case GOT_OBJ_TYPE_COMMIT:
6344 		*commit_id = obj_id;
6345 		break;
6346 	case GOT_OBJ_TYPE_TAG:
6347 		err = got_object_open_as_tag(&tag, repo, obj_id);
6348 		if (err)
6349 			goto done;
6350 		free(obj_id);
6351 		err = got_object_get_type(&obj_type, repo,
6352 		    got_object_tag_get_object_id(tag));
6353 		if (err)
6354 			goto done;
6355 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
6356 			err = got_error(GOT_ERR_OBJ_TYPE);
6357 			goto done;
6358 		}
6359 		*commit_id = got_object_id_dup(
6360 		    got_object_tag_get_object_id(tag));
6361 		if (*commit_id == NULL) {
6362 			err = got_error_from_errno("got_object_id_dup");
6363 			goto done;
6364 		}
6365 		break;
6366 	default:
6367 		err = got_error(GOT_ERR_OBJ_TYPE);
6368 		break;
6369 	}
6370 
6371 done:
6372 	if (tag)
6373 		got_object_tag_close(tag);
6374 	if (err) {
6375 		free(*commit_id);
6376 		*commit_id = NULL;
6377 	}
6378 	return err;
6379 }
6380 
6381 static const struct got_error *
6382 log_ref_entry(struct tog_view **new_view, int begin_x,
6383     struct tog_reflist_entry *re, struct got_repository *repo)
6384 {
6385 	struct tog_view *log_view;
6386 	const struct got_error *err = NULL;
6387 	struct got_object_id *commit_id = NULL;
6388 
6389 	*new_view = NULL;
6390 
6391 	err = resolve_reflist_entry(&commit_id, re, repo);
6392 	if (err) {
6393 		if (err->code != GOT_ERR_OBJ_TYPE)
6394 			return err;
6395 		else
6396 			return NULL;
6397 	}
6398 
6399 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
6400 	if (log_view == NULL) {
6401 		err = got_error_from_errno("view_open");
6402 		goto done;
6403 	}
6404 
6405 	err = open_log_view(log_view, commit_id, repo,
6406 	    got_ref_get_name(re->ref), "", 0);
6407 done:
6408 	if (err)
6409 		view_close(log_view);
6410 	else
6411 		*new_view = log_view;
6412 	free(commit_id);
6413 	return err;
6414 }
6415 
6416 static void
6417 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
6418 {
6419 	struct tog_reflist_entry *re;
6420 	int i = 0;
6421 
6422 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6423 		return;
6424 
6425 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
6426 	while (i++ < maxscroll) {
6427 		if (re == NULL)
6428 			break;
6429 		s->first_displayed_entry = re;
6430 		re = TAILQ_PREV(re, tog_reflist_head, entry);
6431 	}
6432 }
6433 
6434 static void
6435 ref_scroll_down(struct tog_ref_view_state *s, int maxscroll)
6436 {
6437 	struct tog_reflist_entry *next, *last;
6438 	int n = 0;
6439 
6440 	if (s->first_displayed_entry)
6441 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
6442 	else
6443 		next = TAILQ_FIRST(&s->refs);
6444 
6445 	last = s->last_displayed_entry;
6446 	while (next && last && n++ < maxscroll) {
6447 		last = TAILQ_NEXT(last, entry);
6448 		if (last) {
6449 			s->first_displayed_entry = next;
6450 			next = TAILQ_NEXT(next, entry);
6451 		}
6452 	}
6453 }
6454 
6455 static const struct got_error *
6456 search_start_ref_view(struct tog_view *view)
6457 {
6458 	struct tog_ref_view_state *s = &view->state.ref;
6459 
6460 	s->matched_entry = NULL;
6461 	return NULL;
6462 }
6463 
6464 static int
6465 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
6466 {
6467 	regmatch_t regmatch;
6468 
6469 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
6470 	    0) == 0;
6471 }
6472 
6473 static const struct got_error *
6474 search_next_ref_view(struct tog_view *view)
6475 {
6476 	struct tog_ref_view_state *s = &view->state.ref;
6477 	struct tog_reflist_entry *re = NULL;
6478 
6479 	if (!view->searching) {
6480 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6481 		return NULL;
6482 	}
6483 
6484 	if (s->matched_entry) {
6485 		if (view->searching == TOG_SEARCH_FORWARD) {
6486 			if (s->selected_entry)
6487 				re = TAILQ_NEXT(s->selected_entry, entry);
6488 			else
6489 				re = TAILQ_PREV(s->selected_entry,
6490 				    tog_reflist_head, entry);
6491 		} else {
6492 			if (s->selected_entry == NULL)
6493 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6494 			else
6495 				re = TAILQ_PREV(s->selected_entry,
6496 				    tog_reflist_head, entry);
6497 		}
6498 	} else {
6499 		if (s->selected_entry)
6500 			re = s->selected_entry;
6501 		else if (view->searching == TOG_SEARCH_FORWARD)
6502 			re = TAILQ_FIRST(&s->refs);
6503 		else
6504 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
6505 	}
6506 
6507 	while (1) {
6508 		if (re == NULL) {
6509 			if (s->matched_entry == NULL) {
6510 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6511 				return NULL;
6512 			}
6513 			if (view->searching == TOG_SEARCH_FORWARD)
6514 				re = TAILQ_FIRST(&s->refs);
6515 			else
6516 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
6517 		}
6518 
6519 		if (match_reflist_entry(re, &view->regex)) {
6520 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6521 			s->matched_entry = re;
6522 			break;
6523 		}
6524 
6525 		if (view->searching == TOG_SEARCH_FORWARD)
6526 			re = TAILQ_NEXT(re, entry);
6527 		else
6528 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6529 	}
6530 
6531 	if (s->matched_entry) {
6532 		s->first_displayed_entry = s->matched_entry;
6533 		s->selected = 0;
6534 	}
6535 
6536 	return NULL;
6537 }
6538 
6539 static const struct got_error *
6540 show_ref_view(struct tog_view *view)
6541 {
6542 	const struct got_error *err = NULL;
6543 	struct tog_ref_view_state *s = &view->state.ref;
6544 	struct tog_reflist_entry *re;
6545 	char *line = NULL;
6546 	wchar_t *wline;
6547 	struct tog_color *tc;
6548 	int width, n;
6549 	int limit = view->nlines;
6550 
6551 	werase(view->window);
6552 
6553 	s->ndisplayed = 0;
6554 
6555 	if (limit == 0)
6556 		return NULL;
6557 
6558 	re = s->first_displayed_entry;
6559 
6560 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
6561 	    s->nrefs) == -1)
6562 		return got_error_from_errno("asprintf");
6563 
6564 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6565 	if (err) {
6566 		free(line);
6567 		return err;
6568 	}
6569 	if (view_needs_focus_indication(view))
6570 		wstandout(view->window);
6571 	waddwstr(view->window, wline);
6572 	if (view_needs_focus_indication(view))
6573 		wstandend(view->window);
6574 	free(wline);
6575 	wline = NULL;
6576 	free(line);
6577 	line = NULL;
6578 	if (width < view->ncols - 1)
6579 		waddch(view->window, '\n');
6580 	if (--limit <= 0)
6581 		return NULL;
6582 
6583 	n = 0;
6584 	while (re && limit > 0) {
6585 		char *line = NULL;
6586 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
6587 
6588 		if (s->show_date) {
6589 			struct got_commit_object *ci;
6590 			struct got_tag_object *tag;
6591 			struct got_object_id *id;
6592 			struct tm tm;
6593 			time_t t;
6594 
6595 			err = got_ref_resolve(&id, s->repo, re->ref);
6596 			if (err)
6597 				return err;
6598 			err = got_object_open_as_tag(&tag, s->repo, id);
6599 			if (err) {
6600 				if (err->code != GOT_ERR_OBJ_TYPE) {
6601 					free(id);
6602 					return err;
6603 				}
6604 				err = got_object_open_as_commit(&ci, s->repo,
6605 				    id);
6606 				if (err) {
6607 					free(id);
6608 					return err;
6609 				}
6610 				t = got_object_commit_get_committer_time(ci);
6611 				got_object_commit_close(ci);
6612 			} else {
6613 				t = got_object_tag_get_tagger_time(tag);
6614 				got_object_tag_close(tag);
6615 			}
6616 			free(id);
6617 			if (gmtime_r(&t, &tm) == NULL)
6618 				return got_error_from_errno("gmtime_r");
6619 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
6620 				return got_error(GOT_ERR_NO_SPACE);
6621 		}
6622 		if (got_ref_is_symbolic(re->ref)) {
6623 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
6624 			    ymd : "", got_ref_get_name(re->ref),
6625 			    got_ref_get_symref_target(re->ref)) == -1)
6626 				return got_error_from_errno("asprintf");
6627 		} else if (s->show_ids) {
6628 			struct got_object_id *id;
6629 			char *id_str;
6630 			err = got_ref_resolve(&id, s->repo, re->ref);
6631 			if (err)
6632 				return err;
6633 			err = got_object_id_str(&id_str, id);
6634 			if (err) {
6635 				free(id);
6636 				return err;
6637 			}
6638 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
6639 			    got_ref_get_name(re->ref), id_str) == -1) {
6640 				err = got_error_from_errno("asprintf");
6641 				free(id);
6642 				free(id_str);
6643 				return err;
6644 			}
6645 			free(id);
6646 			free(id_str);
6647 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
6648 		    got_ref_get_name(re->ref)) == -1)
6649 			return got_error_from_errno("asprintf");
6650 
6651 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6652 		    0, 0);
6653 		if (err) {
6654 			free(line);
6655 			return err;
6656 		}
6657 		if (n == s->selected) {
6658 			if (view->focussed)
6659 				wstandout(view->window);
6660 			s->selected_entry = re;
6661 		}
6662 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6663 		if (tc)
6664 			wattr_on(view->window,
6665 			    COLOR_PAIR(tc->colorpair), NULL);
6666 		waddwstr(view->window, wline);
6667 		if (tc)
6668 			wattr_off(view->window,
6669 			    COLOR_PAIR(tc->colorpair), NULL);
6670 		if (width < view->ncols - 1)
6671 			waddch(view->window, '\n');
6672 		if (n == s->selected && view->focussed)
6673 			wstandend(view->window);
6674 		free(line);
6675 		free(wline);
6676 		wline = NULL;
6677 		n++;
6678 		s->ndisplayed++;
6679 		s->last_displayed_entry = re;
6680 
6681 		limit--;
6682 		re = TAILQ_NEXT(re, entry);
6683 	}
6684 
6685 	view_vborder(view);
6686 	return err;
6687 }
6688 
6689 static const struct got_error *
6690 browse_ref_tree(struct tog_view **new_view, int begin_x,
6691     struct tog_reflist_entry *re, struct got_repository *repo)
6692 {
6693 	const struct got_error *err = NULL;
6694 	struct got_object_id *commit_id = NULL;
6695 	struct tog_view *tree_view;
6696 
6697 	*new_view = NULL;
6698 
6699 	err = resolve_reflist_entry(&commit_id, re, repo);
6700 	if (err) {
6701 		if (err->code != GOT_ERR_OBJ_TYPE)
6702 			return err;
6703 		else
6704 			return NULL;
6705 	}
6706 
6707 
6708 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6709 	if (tree_view == NULL) {
6710 		err = got_error_from_errno("view_open");
6711 		goto done;
6712 	}
6713 
6714 	err = open_tree_view(tree_view, commit_id,
6715 	    got_ref_get_name(re->ref), repo);
6716 	if (err)
6717 		goto done;
6718 
6719 	*new_view = tree_view;
6720 done:
6721 	free(commit_id);
6722 	return err;
6723 }
6724 static const struct got_error *
6725 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
6726 {
6727 	const struct got_error *err = NULL;
6728 	struct tog_ref_view_state *s = &view->state.ref;
6729 	struct tog_view *log_view, *tree_view;
6730 	struct tog_reflist_entry *re;
6731 	int begin_x = 0, n, nscroll = view->nlines - 1;
6732 
6733 	switch (ch) {
6734 	case 'i':
6735 		s->show_ids = !s->show_ids;
6736 		break;
6737 	case 'm':
6738 		s->show_date = !s->show_date;
6739 		break;
6740 	case 'o':
6741 		s->sort_by_date = !s->sort_by_date;
6742 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
6743 		    got_ref_cmp_by_commit_timestamp_descending :
6744 		    tog_ref_cmp_by_name, s->repo);
6745 		if (err)
6746 			break;
6747 		got_reflist_object_id_map_free(tog_refs_idmap);
6748 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
6749 		    &tog_refs, s->repo);
6750 		if (err)
6751 			break;
6752 		ref_view_free_refs(s);
6753 		err = ref_view_load_refs(s);
6754 		break;
6755 	case KEY_ENTER:
6756 	case '\r':
6757 		if (!s->selected_entry)
6758 			break;
6759 		if (view_is_parent_view(view))
6760 			begin_x = view_split_begin_x(view->begin_x);
6761 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6762 		    s->repo);
6763 		view->focussed = 0;
6764 		log_view->focussed = 1;
6765 		if (view_is_parent_view(view)) {
6766 			err = view_close_child(view);
6767 			if (err)
6768 				return err;
6769 			err = view_set_child(view, log_view);
6770 			if (err)
6771 				return err;
6772 			view->focus_child = 1;
6773 		} else
6774 			*new_view = log_view;
6775 		break;
6776 	case 't':
6777 		if (!s->selected_entry)
6778 			break;
6779 		if (view_is_parent_view(view))
6780 			begin_x = view_split_begin_x(view->begin_x);
6781 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6782 		    s->repo);
6783 		if (err || tree_view == NULL)
6784 			break;
6785 		view->focussed = 0;
6786 		tree_view->focussed = 1;
6787 		if (view_is_parent_view(view)) {
6788 			err = view_close_child(view);
6789 			if (err)
6790 				return err;
6791 			err = view_set_child(view, tree_view);
6792 			if (err)
6793 				return err;
6794 			view->focus_child = 1;
6795 		} else
6796 			*new_view = tree_view;
6797 		break;
6798 	case 'g':
6799 	case KEY_HOME:
6800 		s->selected = 0;
6801 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
6802 		break;
6803 	case 'G':
6804 	case KEY_END:
6805 		s->selected = 0;
6806 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
6807 		for (n = 0; n < view->nlines - 1; n++) {
6808 			if (re == NULL)
6809 				break;
6810 			s->first_displayed_entry = re;
6811 			re = TAILQ_PREV(re, tog_reflist_head, entry);
6812 		}
6813 		if (n > 0)
6814 			s->selected = n - 1;
6815 		break;
6816 	case 'k':
6817 	case KEY_UP:
6818 	case CTRL('p'):
6819 		if (s->selected > 0) {
6820 			s->selected--;
6821 			break;
6822 		}
6823 		ref_scroll_up(s, 1);
6824 		break;
6825 	case CTRL('u'):
6826 	case 'u':
6827 		nscroll /= 2;
6828 		/* FALL THROUGH */
6829 	case KEY_PPAGE:
6830 	case CTRL('b'):
6831 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6832 			s->selected -= MIN(nscroll, s->selected);
6833 		ref_scroll_up(s, MAX(0, nscroll));
6834 		break;
6835 	case 'j':
6836 	case KEY_DOWN:
6837 	case CTRL('n'):
6838 		if (s->selected < s->ndisplayed - 1) {
6839 			s->selected++;
6840 			break;
6841 		}
6842 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6843 			/* can't scroll any further */
6844 			break;
6845 		ref_scroll_down(s, 1);
6846 		break;
6847 	case CTRL('d'):
6848 	case 'd':
6849 		nscroll /= 2;
6850 		/* FALL THROUGH */
6851 	case KEY_NPAGE:
6852 	case CTRL('f'):
6853 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6854 			/* can't scroll any further; move cursor down */
6855 			if (s->selected < s->ndisplayed - 1)
6856 				s->selected += MIN(nscroll,
6857 				    s->ndisplayed - s->selected - 1);
6858 			break;
6859 		}
6860 		ref_scroll_down(s, nscroll);
6861 		break;
6862 	case CTRL('l'):
6863 		tog_free_refs();
6864 		err = tog_load_refs(s->repo, s->sort_by_date);
6865 		if (err)
6866 			break;
6867 		ref_view_free_refs(s);
6868 		err = ref_view_load_refs(s);
6869 		break;
6870 	case KEY_RESIZE:
6871 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
6872 			s->selected = view->nlines - 2;
6873 		break;
6874 	default:
6875 		break;
6876 	}
6877 
6878 	return err;
6879 }
6880 
6881 __dead static void
6882 usage_ref(void)
6883 {
6884 	endwin();
6885 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6886 	    getprogname());
6887 	exit(1);
6888 }
6889 
6890 static const struct got_error *
6891 cmd_ref(int argc, char *argv[])
6892 {
6893 	const struct got_error *error;
6894 	struct got_repository *repo = NULL;
6895 	struct got_worktree *worktree = NULL;
6896 	char *cwd = NULL, *repo_path = NULL;
6897 	int ch;
6898 	struct tog_view *view;
6899 	int *pack_fds = NULL;
6900 
6901 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6902 		switch (ch) {
6903 		case 'r':
6904 			repo_path = realpath(optarg, NULL);
6905 			if (repo_path == NULL)
6906 				return got_error_from_errno2("realpath",
6907 				    optarg);
6908 			break;
6909 		default:
6910 			usage_ref();
6911 			/* NOTREACHED */
6912 		}
6913 	}
6914 
6915 	argc -= optind;
6916 	argv += optind;
6917 
6918 	if (argc > 1)
6919 		usage_ref();
6920 
6921 	error = got_repo_pack_fds_open(&pack_fds);
6922 	if (error != NULL)
6923 		goto done;
6924 
6925 	if (repo_path == NULL) {
6926 		cwd = getcwd(NULL, 0);
6927 		if (cwd == NULL)
6928 			return got_error_from_errno("getcwd");
6929 		error = got_worktree_open(&worktree, cwd);
6930 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6931 			goto done;
6932 		if (worktree)
6933 			repo_path =
6934 			    strdup(got_worktree_get_repo_path(worktree));
6935 		else
6936 			repo_path = strdup(cwd);
6937 		if (repo_path == NULL) {
6938 			error = got_error_from_errno("strdup");
6939 			goto done;
6940 		}
6941 	}
6942 
6943 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6944 	if (error != NULL)
6945 		goto done;
6946 
6947 	init_curses();
6948 
6949 	error = apply_unveil(got_repo_get_path(repo), NULL);
6950 	if (error)
6951 		goto done;
6952 
6953 	error = tog_load_refs(repo, 0);
6954 	if (error)
6955 		goto done;
6956 
6957 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6958 	if (view == NULL) {
6959 		error = got_error_from_errno("view_open");
6960 		goto done;
6961 	}
6962 
6963 	error = open_ref_view(view, repo);
6964 	if (error)
6965 		goto done;
6966 
6967 	if (worktree) {
6968 		/* Release work tree lock. */
6969 		got_worktree_close(worktree);
6970 		worktree = NULL;
6971 	}
6972 	error = view_loop(view);
6973 done:
6974 	free(repo_path);
6975 	free(cwd);
6976 	if (repo) {
6977 		const struct got_error *close_err = got_repo_close(repo);
6978 		if (close_err)
6979 			error = close_err;
6980 	}
6981 	if (pack_fds) {
6982 		const struct got_error *pack_err =
6983 		    got_repo_pack_fds_close(pack_fds);
6984 		if (error == NULL)
6985 			error = pack_err;
6986 	}
6987 	tog_free_refs();
6988 	return error;
6989 }
6990 
6991 static void
6992 list_commands(FILE *fp)
6993 {
6994 	size_t i;
6995 
6996 	fprintf(fp, "commands:");
6997 	for (i = 0; i < nitems(tog_commands); i++) {
6998 		const struct tog_cmd *cmd = &tog_commands[i];
6999 		fprintf(fp, " %s", cmd->name);
7000 	}
7001 	fputc('\n', fp);
7002 }
7003 
7004 __dead static void
7005 usage(int hflag, int status)
7006 {
7007 	FILE *fp = (status == 0) ? stdout : stderr;
7008 
7009 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
7010 	    getprogname());
7011 	if (hflag) {
7012 		fprintf(fp, "lazy usage: %s path\n", getprogname());
7013 		list_commands(fp);
7014 	}
7015 	exit(status);
7016 }
7017 
7018 static char **
7019 make_argv(int argc, ...)
7020 {
7021 	va_list ap;
7022 	char **argv;
7023 	int i;
7024 
7025 	va_start(ap, argc);
7026 
7027 	argv = calloc(argc, sizeof(char *));
7028 	if (argv == NULL)
7029 		err(1, "calloc");
7030 	for (i = 0; i < argc; i++) {
7031 		argv[i] = strdup(va_arg(ap, char *));
7032 		if (argv[i] == NULL)
7033 			err(1, "strdup");
7034 	}
7035 
7036 	va_end(ap);
7037 	return argv;
7038 }
7039 
7040 /*
7041  * Try to convert 'tog path' into a 'tog log path' command.
7042  * The user could simply have mistyped the command rather than knowingly
7043  * provided a path. So check whether argv[0] can in fact be resolved
7044  * to a path in the HEAD commit and print a special error if not.
7045  * This hack is for mpi@ <3
7046  */
7047 static const struct got_error *
7048 tog_log_with_path(int argc, char *argv[])
7049 {
7050 	const struct got_error *error = NULL, *close_err;
7051 	const struct tog_cmd *cmd = NULL;
7052 	struct got_repository *repo = NULL;
7053 	struct got_worktree *worktree = NULL;
7054 	struct got_object_id *commit_id = NULL, *id = NULL;
7055 	struct got_commit_object *commit = NULL;
7056 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7057 	char *commit_id_str = NULL, **cmd_argv = NULL;
7058 	int *pack_fds = NULL;
7059 
7060 	cwd = getcwd(NULL, 0);
7061 	if (cwd == NULL)
7062 		return got_error_from_errno("getcwd");
7063 
7064 	error = got_repo_pack_fds_open(&pack_fds);
7065 	if (error != NULL)
7066 		goto done;
7067 
7068 	error = got_worktree_open(&worktree, cwd);
7069 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
7070 		goto done;
7071 
7072 	if (worktree)
7073 		repo_path = strdup(got_worktree_get_repo_path(worktree));
7074 	else
7075 		repo_path = strdup(cwd);
7076 	if (repo_path == NULL) {
7077 		error = got_error_from_errno("strdup");
7078 		goto done;
7079 	}
7080 
7081 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7082 	if (error != NULL)
7083 		goto done;
7084 
7085 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7086 	    repo, worktree);
7087 	if (error)
7088 		goto done;
7089 
7090 	error = tog_load_refs(repo, 0);
7091 	if (error)
7092 		goto done;
7093 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
7094 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
7095 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7096 	if (error)
7097 		goto done;
7098 
7099 	if (worktree) {
7100 		got_worktree_close(worktree);
7101 		worktree = NULL;
7102 	}
7103 
7104 	error = got_object_open_as_commit(&commit, repo, commit_id);
7105 	if (error)
7106 		goto done;
7107 
7108 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
7109 	if (error) {
7110 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
7111 			goto done;
7112 		fprintf(stderr, "%s: '%s' is no known command or path\n",
7113 		    getprogname(), argv[0]);
7114 		usage(1, 1);
7115 		/* not reached */
7116 	}
7117 
7118 	close_err = got_repo_close(repo);
7119 	if (error == NULL)
7120 		error = close_err;
7121 	repo = NULL;
7122 
7123 	error = got_object_id_str(&commit_id_str, commit_id);
7124 	if (error)
7125 		goto done;
7126 
7127 	cmd = &tog_commands[0]; /* log */
7128 	argc = 4;
7129 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
7130 	error = cmd->cmd_main(argc, cmd_argv);
7131 done:
7132 	if (repo) {
7133 		close_err = got_repo_close(repo);
7134 		if (error == NULL)
7135 			error = close_err;
7136 	}
7137 	if (commit)
7138 		got_object_commit_close(commit);
7139 	if (worktree)
7140 		got_worktree_close(worktree);
7141 	if (pack_fds) {
7142 		const struct got_error *pack_err =
7143 		    got_repo_pack_fds_close(pack_fds);
7144 		if (error == NULL)
7145 			error = pack_err;
7146 	}
7147 	free(id);
7148 	free(commit_id_str);
7149 	free(commit_id);
7150 	free(cwd);
7151 	free(repo_path);
7152 	free(in_repo_path);
7153 	if (cmd_argv) {
7154 		int i;
7155 		for (i = 0; i < argc; i++)
7156 			free(cmd_argv[i]);
7157 		free(cmd_argv);
7158 	}
7159 	tog_free_refs();
7160 	return error;
7161 }
7162 
7163 int
7164 main(int argc, char *argv[])
7165 {
7166 	const struct got_error *error = NULL;
7167 	const struct tog_cmd *cmd = NULL;
7168 	int ch, hflag = 0, Vflag = 0;
7169 	char **cmd_argv = NULL;
7170 	static const struct option longopts[] = {
7171 	    { "version", no_argument, NULL, 'V' },
7172 	    { NULL, 0, NULL, 0}
7173 	};
7174 
7175 	setlocale(LC_CTYPE, "");
7176 
7177 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
7178 		switch (ch) {
7179 		case 'h':
7180 			hflag = 1;
7181 			break;
7182 		case 'V':
7183 			Vflag = 1;
7184 			break;
7185 		default:
7186 			usage(hflag, 1);
7187 			/* NOTREACHED */
7188 		}
7189 	}
7190 
7191 	argc -= optind;
7192 	argv += optind;
7193 	optind = 1;
7194 	optreset = 1;
7195 
7196 	if (Vflag) {
7197 		got_version_print_str();
7198 		return 0;
7199 	}
7200 
7201 #ifndef PROFILE
7202 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
7203 	    NULL) == -1)
7204 		err(1, "pledge");
7205 #endif
7206 
7207 	if (argc == 0) {
7208 		if (hflag)
7209 			usage(hflag, 0);
7210 		/* Build an argument vector which runs a default command. */
7211 		cmd = &tog_commands[0];
7212 		argc = 1;
7213 		cmd_argv = make_argv(argc, cmd->name);
7214 	} else {
7215 		size_t i;
7216 
7217 		/* Did the user specify a command? */
7218 		for (i = 0; i < nitems(tog_commands); i++) {
7219 			if (strncmp(tog_commands[i].name, argv[0],
7220 			    strlen(argv[0])) == 0) {
7221 				cmd = &tog_commands[i];
7222 				break;
7223 			}
7224 		}
7225 	}
7226 
7227 	if (cmd == NULL) {
7228 		if (argc != 1)
7229 			usage(0, 1);
7230 		/* No command specified; try log with a path */
7231 		error = tog_log_with_path(argc, argv);
7232 	} else {
7233 		if (hflag)
7234 			cmd->cmd_usage();
7235 		else
7236 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
7237 	}
7238 
7239 	endwin();
7240 	putchar('\n');
7241 	if (cmd_argv) {
7242 		int i;
7243 		for (i = 0; i < argc; i++)
7244 			free(cmd_argv[i]);
7245 		free(cmd_argv);
7246 	}
7247 
7248 	if (error && error->code != GOT_ERR_CANCELLED)
7249 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
7250 	return 0;
7251 }