1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
24 #include <curses.h>
25 #include <panel.h>
26 #include <locale.h>
27 #include <sha1.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <getopt.h>
33 #include <string.h>
34 #include <err.h>
35 #include <unistd.h>
36 #include <limits.h>
37 #include <wchar.h>
38 #include <time.h>
39 #include <pthread.h>
40 #include <libgen.h>
41 #include <regex.h>
42 #include <sched.h>
43 
44 #include "got_version.h"
45 #include "got_error.h"
46 #include "got_object.h"
47 #include "got_reference.h"
48 #include "got_repository.h"
49 #include "got_diff.h"
50 #include "got_opentemp.h"
51 #include "got_utf8.h"
52 #include "got_cancel.h"
53 #include "got_commit_graph.h"
54 #include "got_blame.h"
55 #include "got_privsep.h"
56 #include "got_path.h"
57 #include "got_worktree.h"
58 
59 #ifndef MIN
60 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
61 #endif
62 
63 #ifndef MAX
64 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
65 #endif
66 
67 #define CTRL(x)		((x) & 0x1f)
68 
69 #ifndef nitems
70 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
71 #endif
72 
73 struct tog_cmd {
74 	const char *name;
75 	const struct got_error *(*cmd_main)(int, char *[]);
76 	void (*cmd_usage)(void);
77 };
78 
79 __dead static void	usage(int, int);
80 __dead static void	usage_log(void);
81 __dead static void	usage_diff(void);
82 __dead static void	usage_blame(void);
83 __dead static void	usage_tree(void);
84 __dead static void	usage_ref(void);
85 
86 static const struct got_error*	cmd_log(int, char *[]);
87 static const struct got_error*	cmd_diff(int, char *[]);
88 static const struct got_error*	cmd_blame(int, char *[]);
89 static const struct got_error*	cmd_tree(int, char *[]);
90 static const struct got_error*	cmd_ref(int, char *[]);
91 
92 static const struct tog_cmd tog_commands[] = {
93 	{ "log",	cmd_log,	usage_log },
94 	{ "diff",	cmd_diff,	usage_diff },
95 	{ "blame",	cmd_blame,	usage_blame },
96 	{ "tree",	cmd_tree,	usage_tree },
97 	{ "ref",	cmd_ref,	usage_ref },
98 };
99 
100 enum tog_view_type {
101 	TOG_VIEW_DIFF,
102 	TOG_VIEW_LOG,
103 	TOG_VIEW_BLAME,
104 	TOG_VIEW_TREE,
105 	TOG_VIEW_REF,
106 };
107 
108 enum tog_view_mode {
109 	TOG_VIEW_SPLIT_NONE,
110 	TOG_VIEW_SPLIT_VERT,
111 	TOG_VIEW_SPLIT_HRZN
112 };
113 
114 #define HSPLIT_SCALE	0.3  /* default horizontal split scale */
115 
116 #define TOG_EOF_STRING	"(END)"
117 
118 struct commit_queue_entry {
119 	TAILQ_ENTRY(commit_queue_entry) entry;
120 	struct got_object_id *id;
121 	struct got_commit_object *commit;
122 	int idx;
123 };
124 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
125 struct commit_queue {
126 	int ncommits;
127 	struct commit_queue_head head;
128 };
129 
130 struct tog_color {
131 	STAILQ_ENTRY(tog_color) entry;
132 	regex_t regex;
133 	short colorpair;
134 };
135 STAILQ_HEAD(tog_colors, tog_color);
136 
137 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
138 static struct got_reflist_object_id_map *tog_refs_idmap;
139 static enum got_diff_algorithm tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
140 
141 static const struct got_error *
142 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
143     struct got_reference* re2)
144 {
145 	const char *name1 = got_ref_get_name(re1);
146 	const char *name2 = got_ref_get_name(re2);
147 	int isbackup1, isbackup2;
148 
149 	/* Sort backup refs towards the bottom of the list. */
150 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
151 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
152 	if (!isbackup1 && isbackup2) {
153 		*cmp = -1;
154 		return NULL;
155 	} else if (isbackup1 && !isbackup2) {
156 		*cmp = 1;
157 		return NULL;
158 	}
159 
160 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
161 	return NULL;
162 }
163 
164 static const struct got_error *
165 tog_load_refs(struct got_repository *repo, int sort_by_date)
166 {
167 	const struct got_error *err;
168 
169 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
170 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
171 	    repo);
172 	if (err)
173 		return err;
174 
175 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
176 	    repo);
177 }
178 
179 static void
180 tog_free_refs(void)
181 {
182 	if (tog_refs_idmap) {
183 		got_reflist_object_id_map_free(tog_refs_idmap);
184 		tog_refs_idmap = NULL;
185 	}
186 	got_ref_list_free(&tog_refs);
187 }
188 
189 static const struct got_error *
190 add_color(struct tog_colors *colors, const char *pattern,
191     int idx, short color)
192 {
193 	const struct got_error *err = NULL;
194 	struct tog_color *tc;
195 	int regerr = 0;
196 
197 	if (idx < 1 || idx > COLOR_PAIRS - 1)
198 		return NULL;
199 
200 	init_pair(idx, color, -1);
201 
202 	tc = calloc(1, sizeof(*tc));
203 	if (tc == NULL)
204 		return got_error_from_errno("calloc");
205 	regerr = regcomp(&tc->regex, pattern,
206 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
207 	if (regerr) {
208 		static char regerr_msg[512];
209 		static char err_msg[512];
210 		regerror(regerr, &tc->regex, regerr_msg,
211 		    sizeof(regerr_msg));
212 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
213 		    regerr_msg);
214 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
215 		free(tc);
216 		return err;
217 	}
218 	tc->colorpair = idx;
219 	STAILQ_INSERT_HEAD(colors, tc, entry);
220 	return NULL;
221 }
222 
223 static void
224 free_colors(struct tog_colors *colors)
225 {
226 	struct tog_color *tc;
227 
228 	while (!STAILQ_EMPTY(colors)) {
229 		tc = STAILQ_FIRST(colors);
230 		STAILQ_REMOVE_HEAD(colors, entry);
231 		regfree(&tc->regex);
232 		free(tc);
233 	}
234 }
235 
236 static struct tog_color *
237 get_color(struct tog_colors *colors, int colorpair)
238 {
239 	struct tog_color *tc = NULL;
240 
241 	STAILQ_FOREACH(tc, colors, entry) {
242 		if (tc->colorpair == colorpair)
243 			return tc;
244 	}
245 
246 	return NULL;
247 }
248 
249 static int
250 default_color_value(const char *envvar)
251 {
252 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
253 		return COLOR_MAGENTA;
254 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
255 		return COLOR_CYAN;
256 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
257 		return COLOR_YELLOW;
258 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
259 		return COLOR_GREEN;
260 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
261 		return COLOR_MAGENTA;
262 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
263 		return COLOR_MAGENTA;
264 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
265 		return COLOR_CYAN;
266 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
267 		return COLOR_GREEN;
268 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
269 		return COLOR_GREEN;
270 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
271 		return COLOR_CYAN;
272 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
273 		return COLOR_YELLOW;
274 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
275 		return COLOR_GREEN;
276 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
277 		return COLOR_MAGENTA;
278 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
279 		return COLOR_YELLOW;
280 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
281 		return COLOR_CYAN;
282 
283 	return -1;
284 }
285 
286 static int
287 get_color_value(const char *envvar)
288 {
289 	const char *val = getenv(envvar);
290 
291 	if (val == NULL)
292 		return default_color_value(envvar);
293 
294 	if (strcasecmp(val, "black") == 0)
295 		return COLOR_BLACK;
296 	if (strcasecmp(val, "red") == 0)
297 		return COLOR_RED;
298 	if (strcasecmp(val, "green") == 0)
299 		return COLOR_GREEN;
300 	if (strcasecmp(val, "yellow") == 0)
301 		return COLOR_YELLOW;
302 	if (strcasecmp(val, "blue") == 0)
303 		return COLOR_BLUE;
304 	if (strcasecmp(val, "magenta") == 0)
305 		return COLOR_MAGENTA;
306 	if (strcasecmp(val, "cyan") == 0)
307 		return COLOR_CYAN;
308 	if (strcasecmp(val, "white") == 0)
309 		return COLOR_WHITE;
310 	if (strcasecmp(val, "default") == 0)
311 		return -1;
312 
313 	return default_color_value(envvar);
314 }
315 
316 struct tog_diff_view_state {
317 	struct got_object_id *id1, *id2;
318 	const char *label1, *label2;
319 	FILE *f, *f1, *f2;
320 	int fd1, fd2;
321 	int lineno;
322 	int first_displayed_line;
323 	int last_displayed_line;
324 	int eof;
325 	int diff_context;
326 	int ignore_whitespace;
327 	int force_text_diff;
328 	struct got_repository *repo;
329 	struct got_diff_line *lines;
330 	size_t nlines;
331 	int matched_line;
332 	int selected_line;
333 
334 	/* passed from log or blame view; may be NULL */
335 	struct tog_view *parent_view;
336 };
337 
338 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
339 static volatile sig_atomic_t tog_thread_error;
340 
341 struct tog_log_thread_args {
342 	pthread_cond_t need_commits;
343 	pthread_cond_t commit_loaded;
344 	int commits_needed;
345 	int load_all;
346 	struct got_commit_graph *graph;
347 	struct commit_queue *commits;
348 	const char *in_repo_path;
349 	struct got_object_id *start_id;
350 	struct got_repository *repo;
351 	int *pack_fds;
352 	int log_complete;
353 	sig_atomic_t *quit;
354 	struct commit_queue_entry **first_displayed_entry;
355 	struct commit_queue_entry **selected_entry;
356 	int *searching;
357 	int *search_next_done;
358 	regex_t *regex;
359 };
360 
361 struct tog_log_view_state {
362 	struct commit_queue commits;
363 	struct commit_queue_entry *first_displayed_entry;
364 	struct commit_queue_entry *last_displayed_entry;
365 	struct commit_queue_entry *selected_entry;
366 	int selected;
367 	char *in_repo_path;
368 	char *head_ref_name;
369 	int log_branches;
370 	struct got_repository *repo;
371 	struct got_object_id *start_id;
372 	sig_atomic_t quit;
373 	pthread_t thread;
374 	struct tog_log_thread_args thread_args;
375 	struct commit_queue_entry *matched_entry;
376 	struct commit_queue_entry *search_entry;
377 	struct tog_colors colors;
378 	int use_committer;
379 };
380 
381 #define TOG_COLOR_DIFF_MINUS		1
382 #define TOG_COLOR_DIFF_PLUS		2
383 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
384 #define TOG_COLOR_DIFF_META		4
385 #define TOG_COLOR_TREE_SUBMODULE	5
386 #define TOG_COLOR_TREE_SYMLINK		6
387 #define TOG_COLOR_TREE_DIRECTORY	7
388 #define TOG_COLOR_TREE_EXECUTABLE	8
389 #define TOG_COLOR_COMMIT		9
390 #define TOG_COLOR_AUTHOR		10
391 #define TOG_COLOR_DATE			11
392 #define TOG_COLOR_REFS_HEADS		12
393 #define TOG_COLOR_REFS_TAGS		13
394 #define TOG_COLOR_REFS_REMOTES		14
395 #define TOG_COLOR_REFS_BACKUP		15
396 
397 struct tog_blame_cb_args {
398 	struct tog_blame_line *lines; /* one per line */
399 	int nlines;
400 
401 	struct tog_view *view;
402 	struct got_object_id *commit_id;
403 	int *quit;
404 };
405 
406 struct tog_blame_thread_args {
407 	const char *path;
408 	struct got_repository *repo;
409 	struct tog_blame_cb_args *cb_args;
410 	int *complete;
411 	got_cancel_cb cancel_cb;
412 	void *cancel_arg;
413 };
414 
415 struct tog_blame {
416 	FILE *f;
417 	off_t filesize;
418 	struct tog_blame_line *lines;
419 	int nlines;
420 	off_t *line_offsets;
421 	pthread_t thread;
422 	struct tog_blame_thread_args thread_args;
423 	struct tog_blame_cb_args cb_args;
424 	const char *path;
425 	int *pack_fds;
426 };
427 
428 struct tog_blame_view_state {
429 	int first_displayed_line;
430 	int last_displayed_line;
431 	int selected_line;
432 	int last_diffed_line;
433 	int blame_complete;
434 	int eof;
435 	int done;
436 	struct got_object_id_queue blamed_commits;
437 	struct got_object_qid *blamed_commit;
438 	char *path;
439 	struct got_repository *repo;
440 	struct got_object_id *commit_id;
441 	struct got_object_id *id_to_log;
442 	struct tog_blame blame;
443 	int matched_line;
444 	struct tog_colors colors;
445 };
446 
447 struct tog_parent_tree {
448 	TAILQ_ENTRY(tog_parent_tree) entry;
449 	struct got_tree_object *tree;
450 	struct got_tree_entry *first_displayed_entry;
451 	struct got_tree_entry *selected_entry;
452 	int selected;
453 };
454 
455 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
456 
457 struct tog_tree_view_state {
458 	char *tree_label;
459 	struct got_object_id *commit_id;/* commit which this tree belongs to */
460 	struct got_tree_object *root;	/* the commit's root tree entry */
461 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
462 	struct got_tree_entry *first_displayed_entry;
463 	struct got_tree_entry *last_displayed_entry;
464 	struct got_tree_entry *selected_entry;
465 	int ndisplayed, selected, show_ids;
466 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
467 	char *head_ref_name;
468 	struct got_repository *repo;
469 	struct got_tree_entry *matched_entry;
470 	struct tog_colors colors;
471 };
472 
473 struct tog_reflist_entry {
474 	TAILQ_ENTRY(tog_reflist_entry) entry;
475 	struct got_reference *ref;
476 	int idx;
477 };
478 
479 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
480 
481 struct tog_ref_view_state {
482 	struct tog_reflist_head refs;
483 	struct tog_reflist_entry *first_displayed_entry;
484 	struct tog_reflist_entry *last_displayed_entry;
485 	struct tog_reflist_entry *selected_entry;
486 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
487 	struct got_repository *repo;
488 	struct tog_reflist_entry *matched_entry;
489 	struct tog_colors colors;
490 };
491 
492 /*
493  * We implement two types of views: parent views and child views.
494  *
495  * The 'Tab' key switches focus between a parent view and its child view.
496  * Child views are shown side-by-side to their parent view, provided
497  * there is enough screen estate.
498  *
499  * When a new view is opened from within a parent view, this new view
500  * becomes a child view of the parent view, replacing any existing child.
501  *
502  * When a new view is opened from within a child view, this new view
503  * becomes a parent view which will obscure the views below until the
504  * user quits the new parent view by typing 'q'.
505  *
506  * This list of views contains parent views only.
507  * Child views are only pointed to by their parent view.
508  */
509 TAILQ_HEAD(tog_view_list_head, tog_view);
510 
511 struct tog_view {
512 	TAILQ_ENTRY(tog_view) entry;
513 	WINDOW *window;
514 	PANEL *panel;
515 	int nlines, ncols, begin_y, begin_x; /* based on split height/width */
516 	int resized_y, resized_x; /* begin_y/x based on user resizing */
517 	int maxx, x; /* max column and current start column */
518 	int lines, cols; /* copies of LINES and COLS */
519 	int nscrolled, offset; /* lines scrolled and hsplit line offset */
520 	int gline, hiline; /* navigate to and highlight this nG line */
521 	int ch, count; /* current keymap and count prefix */
522 	int resized; /* set when in a resize event */
523 	int focussed; /* Only set on one parent or child view at a time. */
524 	int dying;
525 	struct tog_view *parent;
526 	struct tog_view *child;
527 
528 	/*
529 	 * This flag is initially set on parent views when a new child view
530 	 * is created. It gets toggled when the 'Tab' key switches focus
531 	 * between parent and child.
532 	 * The flag indicates whether focus should be passed on to our child
533 	 * view if this parent view gets picked for focus after another parent
534 	 * view was closed. This prevents child views from losing focus in such
535 	 * situations.
536 	 */
537 	int focus_child;
538 
539 	enum tog_view_mode mode;
540 	/* type-specific state */
541 	enum tog_view_type type;
542 	union {
543 		struct tog_diff_view_state diff;
544 		struct tog_log_view_state log;
545 		struct tog_blame_view_state blame;
546 		struct tog_tree_view_state tree;
547 		struct tog_ref_view_state ref;
548 	} state;
549 
550 	const struct got_error *(*show)(struct tog_view *);
551 	const struct got_error *(*input)(struct tog_view **,
552 	    struct tog_view *, int);
553 	const struct got_error *(*reset)(struct tog_view *);
554 	const struct got_error *(*resize)(struct tog_view *, int);
555 	const struct got_error *(*close)(struct tog_view *);
556 
557 	const struct got_error *(*search_start)(struct tog_view *);
558 	const struct got_error *(*search_next)(struct tog_view *);
559 	int search_started;
560 	int searching;
561 #define TOG_SEARCH_FORWARD	1
562 #define TOG_SEARCH_BACKWARD	2
563 	int search_next_done;
564 #define TOG_SEARCH_HAVE_MORE	1
565 #define TOG_SEARCH_NO_MORE	2
566 #define TOG_SEARCH_HAVE_NONE	3
567 	regex_t regex;
568 	regmatch_t regmatch;
569 };
570 
571 static const struct got_error *open_diff_view(struct tog_view *,
572     struct got_object_id *, struct got_object_id *,
573     const char *, const char *, int, int, int, struct tog_view *,
574     struct got_repository *);
575 static const struct got_error *show_diff_view(struct tog_view *);
576 static const struct got_error *input_diff_view(struct tog_view **,
577     struct tog_view *, int);
578 static const struct got_error *reset_diff_view(struct tog_view *);
579 static const struct got_error* close_diff_view(struct tog_view *);
580 static const struct got_error *search_start_diff_view(struct tog_view *);
581 static const struct got_error *search_next_diff_view(struct tog_view *);
582 
583 static const struct got_error *open_log_view(struct tog_view *,
584     struct got_object_id *, struct got_repository *,
585     const char *, const char *, int);
586 static const struct got_error * show_log_view(struct tog_view *);
587 static const struct got_error *input_log_view(struct tog_view **,
588     struct tog_view *, int);
589 static const struct got_error *resize_log_view(struct tog_view *, int);
590 static const struct got_error *close_log_view(struct tog_view *);
591 static const struct got_error *search_start_log_view(struct tog_view *);
592 static const struct got_error *search_next_log_view(struct tog_view *);
593 
594 static const struct got_error *open_blame_view(struct tog_view *, char *,
595     struct got_object_id *, struct got_repository *);
596 static const struct got_error *show_blame_view(struct tog_view *);
597 static const struct got_error *input_blame_view(struct tog_view **,
598     struct tog_view *, int);
599 static const struct got_error *reset_blame_view(struct tog_view *);
600 static const struct got_error *close_blame_view(struct tog_view *);
601 static const struct got_error *search_start_blame_view(struct tog_view *);
602 static const struct got_error *search_next_blame_view(struct tog_view *);
603 
604 static const struct got_error *open_tree_view(struct tog_view *,
605     struct got_object_id *, const char *, struct got_repository *);
606 static const struct got_error *show_tree_view(struct tog_view *);
607 static const struct got_error *input_tree_view(struct tog_view **,
608     struct tog_view *, int);
609 static const struct got_error *close_tree_view(struct tog_view *);
610 static const struct got_error *search_start_tree_view(struct tog_view *);
611 static const struct got_error *search_next_tree_view(struct tog_view *);
612 
613 static const struct got_error *open_ref_view(struct tog_view *,
614     struct got_repository *);
615 static const struct got_error *show_ref_view(struct tog_view *);
616 static const struct got_error *input_ref_view(struct tog_view **,
617     struct tog_view *, int);
618 static const struct got_error *close_ref_view(struct tog_view *);
619 static const struct got_error *search_start_ref_view(struct tog_view *);
620 static const struct got_error *search_next_ref_view(struct tog_view *);
621 
622 static volatile sig_atomic_t tog_sigwinch_received;
623 static volatile sig_atomic_t tog_sigpipe_received;
624 static volatile sig_atomic_t tog_sigcont_received;
625 static volatile sig_atomic_t tog_sigint_received;
626 static volatile sig_atomic_t tog_sigterm_received;
627 
628 static void
629 tog_sigwinch(int signo)
630 {
631 	tog_sigwinch_received = 1;
632 }
633 
634 static void
635 tog_sigpipe(int signo)
636 {
637 	tog_sigpipe_received = 1;
638 }
639 
640 static void
641 tog_sigcont(int signo)
642 {
643 	tog_sigcont_received = 1;
644 }
645 
646 static void
647 tog_sigint(int signo)
648 {
649 	tog_sigint_received = 1;
650 }
651 
652 static void
653 tog_sigterm(int signo)
654 {
655 	tog_sigterm_received = 1;
656 }
657 
658 static int
659 tog_fatal_signal_received(void)
660 {
661 	return (tog_sigpipe_received ||
662 	    tog_sigint_received || tog_sigint_received);
663 }
664 
665 static const struct got_error *
666 view_close(struct tog_view *view)
667 {
668 	const struct got_error *err = NULL, *child_err = NULL;
669 
670 	if (view->child) {
671 		child_err = view_close(view->child);
672 		view->child = NULL;
673 	}
674 	if (view->close)
675 		err = view->close(view);
676 	if (view->panel)
677 		del_panel(view->panel);
678 	if (view->window)
679 		delwin(view->window);
680 	free(view);
681 	return err ? err : child_err;
682 }
683 
684 static struct tog_view *
685 view_open(int nlines, int ncols, int begin_y, int begin_x,
686     enum tog_view_type type)
687 {
688 	struct tog_view *view = calloc(1, sizeof(*view));
689 
690 	if (view == NULL)
691 		return NULL;
692 
693 	view->type = type;
694 	view->lines = LINES;
695 	view->cols = COLS;
696 	view->nlines = nlines ? nlines : LINES - begin_y;
697 	view->ncols = ncols ? ncols : COLS - begin_x;
698 	view->begin_y = begin_y;
699 	view->begin_x = begin_x;
700 	view->window = newwin(nlines, ncols, begin_y, begin_x);
701 	if (view->window == NULL) {
702 		view_close(view);
703 		return NULL;
704 	}
705 	view->panel = new_panel(view->window);
706 	if (view->panel == NULL ||
707 	    set_panel_userptr(view->panel, view) != OK) {
708 		view_close(view);
709 		return NULL;
710 	}
711 
712 	keypad(view->window, TRUE);
713 	return view;
714 }
715 
716 static int
717 view_split_begin_x(int begin_x)
718 {
719 	if (begin_x > 0 || COLS < 120)
720 		return 0;
721 	return (COLS - MAX(COLS / 2, 80));
722 }
723 
724 /* XXX Stub till we decide what to do. */
725 static int
726 view_split_begin_y(int lines)
727 {
728 	return lines * HSPLIT_SCALE;
729 }
730 
731 static const struct got_error *view_resize(struct tog_view *);
732 
733 static const struct got_error *
734 view_splitscreen(struct tog_view *view)
735 {
736 	const struct got_error *err = NULL;
737 
738 	if (!view->resized && view->mode == TOG_VIEW_SPLIT_HRZN) {
739 		if (view->resized_y && view->resized_y < view->lines)
740 			view->begin_y = view->resized_y;
741 		else
742 			view->begin_y = view_split_begin_y(view->nlines);
743 		view->begin_x = 0;
744 	} else if (!view->resized) {
745 		if (view->resized_x && view->resized_x < view->cols - 1 &&
746 		    view->cols > 119)
747 			view->begin_x = view->resized_x;
748 		else
749 			view->begin_x = view_split_begin_x(0);
750 		view->begin_y = 0;
751 	}
752 	view->nlines = LINES - view->begin_y;
753 	view->ncols = COLS - view->begin_x;
754 	view->lines = LINES;
755 	view->cols = COLS;
756 	err = view_resize(view);
757 	if (err)
758 		return err;
759 
760 	if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN)
761 		view->parent->nlines = view->begin_y;
762 
763 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
764 		return got_error_from_errno("mvwin");
765 
766 	return NULL;
767 }
768 
769 static const struct got_error *
770 view_fullscreen(struct tog_view *view)
771 {
772 	const struct got_error *err = NULL;
773 
774 	view->begin_x = 0;
775 	view->begin_y = view->resized ? view->begin_y : 0;
776 	view->nlines = view->resized ? view->nlines : LINES;
777 	view->ncols = COLS;
778 	view->lines = LINES;
779 	view->cols = COLS;
780 	err = view_resize(view);
781 	if (err)
782 		return err;
783 
784 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
785 		return got_error_from_errno("mvwin");
786 
787 	return NULL;
788 }
789 
790 static int
791 view_is_parent_view(struct tog_view *view)
792 {
793 	return view->parent == NULL;
794 }
795 
796 static int
797 view_is_splitscreen(struct tog_view *view)
798 {
799 	return view->begin_x > 0 || view->begin_y > 0;
800 }
801 
802 static int
803 view_is_fullscreen(struct tog_view *view)
804 {
805 	return view->nlines == LINES && view->ncols == COLS;
806 }
807 
808 static int
809 view_is_hsplit_top(struct tog_view *view)
810 {
811 	return view->mode == TOG_VIEW_SPLIT_HRZN && view->child &&
812 	    view_is_splitscreen(view->child);
813 }
814 
815 static void
816 view_border(struct tog_view *view)
817 {
818 	PANEL *panel;
819 	const struct tog_view *view_above;
820 
821 	if (view->parent)
822 		return view_border(view->parent);
823 
824 	panel = panel_above(view->panel);
825 	if (panel == NULL)
826 		return;
827 
828 	view_above = panel_userptr(panel);
829 	if (view->mode == TOG_VIEW_SPLIT_HRZN)
830 		mvwhline(view->window, view_above->begin_y - 1,
831 		    view->begin_x, got_locale_is_utf8() ?
832 		    ACS_HLINE : '-', view->ncols);
833 	else
834 		mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
835 		    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
836 }
837 
838 static const struct got_error *view_init_hsplit(struct tog_view *, int);
839 static const struct got_error *request_log_commits(struct tog_view *);
840 static const struct got_error *offset_selection_down(struct tog_view *);
841 static void offset_selection_up(struct tog_view *);
842 static void view_get_split(struct tog_view *, int *, int *);
843 
844 static const struct got_error *
845 view_resize(struct tog_view *view)
846 {
847 	const struct got_error	*err = NULL;
848 	int			 dif, nlines, ncols;
849 
850 	dif = LINES - view->lines;  /* line difference */
851 
852 	if (view->lines > LINES)
853 		nlines = view->nlines - (view->lines - LINES);
854 	else
855 		nlines = view->nlines + (LINES - view->lines);
856 	if (view->cols > COLS)
857 		ncols = view->ncols - (view->cols - COLS);
858 	else
859 		ncols = view->ncols + (COLS - view->cols);
860 
861 	if (view->child) {
862 		int hs = view->child->begin_y;
863 
864 		if (!view_is_fullscreen(view))
865 			view->child->begin_x = view_split_begin_x(view->begin_x);
866 		if (view->mode == TOG_VIEW_SPLIT_HRZN ||
867 		    view->child->begin_x == 0) {
868 			ncols = COLS;
869 
870 			view_fullscreen(view->child);
871 			if (view->child->focussed)
872 				show_panel(view->child->panel);
873 			else
874 				show_panel(view->panel);
875 		} else {
876 			ncols = view->child->begin_x;
877 
878 			view_splitscreen(view->child);
879 			show_panel(view->child->panel);
880 		}
881 		/*
882 		 * XXX This is ugly and needs to be moved into the above
883 		 * logic but "works" for now and my attempts at moving it
884 		 * break either 'tab' or 'F' key maps in horizontal splits.
885 		 */
886 		if (hs) {
887 			err = view_splitscreen(view->child);
888 			if (err)
889 				return err;
890 			if (dif < 0) { /* top split decreased */
891 				err = offset_selection_down(view);
892 				if (err)
893 					return err;
894 			}
895 			view_border(view);
896 			update_panels();
897 			doupdate();
898 			show_panel(view->child->panel);
899 			nlines = view->nlines;
900 		}
901 	} else if (view->parent == NULL)
902 		ncols = COLS;
903 
904 	if (view->resize && dif > 0) {
905 		err = view->resize(view, dif);
906 		if (err)
907 			return err;
908 	}
909 
910 	if (wresize(view->window, nlines, ncols) == ERR)
911 		return got_error_from_errno("wresize");
912 	if (replace_panel(view->panel, view->window) == ERR)
913 		return got_error_from_errno("replace_panel");
914 	wclear(view->window);
915 
916 	view->nlines = nlines;
917 	view->ncols = ncols;
918 	view->lines = LINES;
919 	view->cols = COLS;
920 
921 	return NULL;
922 }
923 
924 static const struct got_error *
925 resize_log_view(struct tog_view *view, int increase)
926 {
927 	struct tog_log_view_state	*s = &view->state.log;
928 	const struct got_error		*err = NULL;
929 	int				 n = 0;
930 
931 	if (s->selected_entry)
932 		n = s->selected_entry->idx + view->lines - s->selected;
933 
934 	/*
935 	 * Request commits to account for the increased
936 	 * height so we have enough to populate the view.
937 	 */
938 	if (s->commits.ncommits < n) {
939 		view->nscrolled = n - s->commits.ncommits + increase + 1;
940 		err = request_log_commits(view);
941 	}
942 
943 	return err;
944 }
945 
946 static void
947 view_adjust_offset(struct tog_view *view, int n)
948 {
949 	if (n == 0)
950 		return;
951 
952 	if (view->parent && view->parent->offset) {
953 		if (view->parent->offset + n >= 0)
954 			view->parent->offset += n;
955 		else
956 			view->parent->offset = 0;
957 	} else if (view->offset) {
958 		if (view->offset - n >= 0)
959 			view->offset -= n;
960 		else
961 			view->offset = 0;
962 	}
963 }
964 
965 static const struct got_error *
966 view_resize_split(struct tog_view *view, int resize)
967 {
968 	const struct got_error	*err = NULL;
969 	struct tog_view		*v = NULL;
970 
971 	if (view->parent)
972 		v = view->parent;
973 	else
974 		v = view;
975 
976 	if (!v->child || !view_is_splitscreen(v->child))
977 		return NULL;
978 
979 	v->resized = v->child->resized = resize;  /* lock for resize event */
980 
981 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
982 		if (v->child->resized_y)
983 			v->child->begin_y = v->child->resized_y;
984 		if (view->parent)
985 			v->child->begin_y -= resize;
986 		else
987 			v->child->begin_y += resize;
988 		if (v->child->begin_y < 3) {
989 			view->count = 0;
990 			v->child->begin_y = 3;
991 		} else if (v->child->begin_y > LINES - 1) {
992 			view->count = 0;
993 			v->child->begin_y = LINES - 1;
994 		}
995 		v->ncols = COLS;
996 		v->child->ncols = COLS;
997 		view_adjust_offset(view, resize);
998 		err = view_init_hsplit(v, v->child->begin_y);
999 		if (err)
1000 			return err;
1001 		v->child->resized_y = v->child->begin_y;
1002 	} else {
1003 		if (v->child->resized_x)
1004 			v->child->begin_x = v->child->resized_x;
1005 		if (view->parent)
1006 			v->child->begin_x -= resize;
1007 		else
1008 			v->child->begin_x += resize;
1009 		if (v->child->begin_x < 11) {
1010 			view->count = 0;
1011 			v->child->begin_x = 11;
1012 		} else if (v->child->begin_x > COLS - 1) {
1013 			view->count = 0;
1014 			v->child->begin_x = COLS - 1;
1015 		}
1016 		v->child->resized_x = v->child->begin_x;
1017 	}
1018 
1019 	v->child->mode = v->mode;
1020 	v->child->nlines = v->lines - v->child->begin_y;
1021 	v->child->ncols = v->cols - v->child->begin_x;
1022 	v->focus_child = 1;
1023 
1024 	err = view_fullscreen(v);
1025 	if (err)
1026 		return err;
1027 	err = view_splitscreen(v->child);
1028 	if (err)
1029 		return err;
1030 
1031 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1032 		err = offset_selection_down(v->child);
1033 		if (err)
1034 			return err;
1035 	}
1036 
1037 	if (v->resize)
1038 		err = v->resize(v, 0);
1039 	else if (v->child->resize)
1040 		err = v->child->resize(v->child, 0);
1041 
1042 	v->resized = v->child->resized = 0;
1043 
1044 	return err;
1045 }
1046 
1047 static void
1048 view_transfer_size(struct tog_view *dst, struct tog_view *src)
1049 {
1050 	struct tog_view *v = src->child ? src->child : src;
1051 
1052 	dst->resized_x = v->resized_x;
1053 	dst->resized_y = v->resized_y;
1054 }
1055 
1056 static const struct got_error *
1057 view_close_child(struct tog_view *view)
1058 {
1059 	const struct got_error *err = NULL;
1060 
1061 	if (view->child == NULL)
1062 		return NULL;
1063 
1064 	err = view_close(view->child);
1065 	view->child = NULL;
1066 	return err;
1067 }
1068 
1069 static const struct got_error *
1070 view_set_child(struct tog_view *view, struct tog_view *child)
1071 {
1072 	const struct got_error *err = NULL;
1073 
1074 	view->child = child;
1075 	child->parent = view;
1076 
1077 	err = view_resize(view);
1078 	if (err)
1079 		return err;
1080 
1081 	if (view->child->resized_x || view->child->resized_y)
1082 		err = view_resize_split(view, 0);
1083 
1084 	return err;
1085 }
1086 
1087 static const struct got_error *view_dispatch_request(struct tog_view **,
1088     struct tog_view *, enum tog_view_type, int, int);
1089 
1090 static const struct got_error *
1091 view_request_new(struct tog_view **requested, struct tog_view *view,
1092     enum tog_view_type request)
1093 {
1094 	struct tog_view		*new_view = NULL;
1095 	const struct got_error	*err;
1096 	int			 y = 0, x = 0;
1097 
1098 	*requested = NULL;
1099 
1100 	if (view_is_parent_view(view))
1101 		view_get_split(view, &y, &x);
1102 
1103 	err = view_dispatch_request(&new_view, view, request, y, x);
1104 	if (err)
1105 		return err;
1106 
1107 	if (view_is_parent_view(view) && view->mode == TOG_VIEW_SPLIT_HRZN) {
1108 		err = view_init_hsplit(view, y);
1109 		if (err)
1110 			return err;
1111 	}
1112 
1113 	view->focussed = 0;
1114 	new_view->focussed = 1;
1115 	new_view->mode = view->mode;
1116 	new_view->nlines = view->lines - y;
1117 
1118 	if (view_is_parent_view(view)) {
1119 		view_transfer_size(new_view, view);
1120 		err = view_close_child(view);
1121 		if (err)
1122 			return err;
1123 		err = view_set_child(view, new_view);
1124 		if (err)
1125 			return err;
1126 		view->focus_child = 1;
1127 	} else
1128 		*requested = new_view;
1129 
1130 	return NULL;
1131 }
1132 
1133 static void
1134 tog_resizeterm(void)
1135 {
1136 	int cols, lines;
1137 	struct winsize size;
1138 
1139 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
1140 		cols = 80;     /* Default */
1141 		lines = 24;
1142 	} else {
1143 		cols = size.ws_col;
1144 		lines = size.ws_row;
1145 	}
1146 	resize_term(lines, cols);
1147 }
1148 
1149 static const struct got_error *
1150 view_search_start(struct tog_view *view)
1151 {
1152 	const struct got_error *err = NULL;
1153 	struct tog_view *v = view;
1154 	char pattern[1024];
1155 	int ret;
1156 
1157 	if (view->search_started) {
1158 		regfree(&view->regex);
1159 		view->searching = 0;
1160 		memset(&view->regmatch, 0, sizeof(view->regmatch));
1161 	}
1162 	view->search_started = 0;
1163 
1164 	if (view->nlines < 1)
1165 		return NULL;
1166 
1167 	if (view_is_hsplit_top(view))
1168 		v = view->child;
1169 
1170 	mvwaddstr(v->window, v->nlines - 1, 0, "/");
1171 	wclrtoeol(v->window);
1172 
1173 	nodelay(view->window, FALSE);  /* block for search term input */
1174 	nocbreak();
1175 	echo();
1176 	ret = wgetnstr(v->window, pattern, sizeof(pattern));
1177 	wrefresh(v->window);
1178 	cbreak();
1179 	noecho();
1180 	nodelay(view->window, TRUE);
1181 	if (ret == ERR)
1182 		return NULL;
1183 
1184 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
1185 		err = view->search_start(view);
1186 		if (err) {
1187 			regfree(&view->regex);
1188 			return err;
1189 		}
1190 		view->search_started = 1;
1191 		view->searching = TOG_SEARCH_FORWARD;
1192 		view->search_next_done = 0;
1193 		view->search_next(view);
1194 	}
1195 
1196 	return NULL;
1197 }
1198 
1199 /* Switch split mode. If view is a parent or child, draw the new splitscreen. */
1200 static const struct got_error *
1201 switch_split(struct tog_view *view)
1202 {
1203 	const struct got_error	*err = NULL;
1204 	struct tog_view		*v = NULL;
1205 
1206 	if (view->parent)
1207 		v = view->parent;
1208 	else
1209 		v = view;
1210 
1211 	if (v->mode == TOG_VIEW_SPLIT_HRZN)
1212 		v->mode = TOG_VIEW_SPLIT_VERT;
1213 	else
1214 		v->mode = TOG_VIEW_SPLIT_HRZN;
1215 
1216 	if (!v->child)
1217 		return NULL;
1218 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->cols < 120)
1219 		v->mode = TOG_VIEW_SPLIT_NONE;
1220 
1221 	view_get_split(v, &v->child->begin_y, &v->child->begin_x);
1222 	if (v->mode == TOG_VIEW_SPLIT_HRZN && v->child->resized_y)
1223 		v->child->begin_y = v->child->resized_y;
1224 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->child->resized_x)
1225 		v->child->begin_x = v->child->resized_x;
1226 
1227 
1228 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1229 		v->ncols = COLS;
1230 		v->child->ncols = COLS;
1231 		v->child->nscrolled = LINES - v->child->nlines;
1232 
1233 		err = view_init_hsplit(v, v->child->begin_y);
1234 		if (err)
1235 			return err;
1236 	}
1237 	v->child->mode = v->mode;
1238 	v->child->nlines = v->lines - v->child->begin_y;
1239 	v->focus_child = 1;
1240 
1241 	err = view_fullscreen(v);
1242 	if (err)
1243 		return err;
1244 	err = view_splitscreen(v->child);
1245 	if (err)
1246 		return err;
1247 
1248 	if (v->mode == TOG_VIEW_SPLIT_NONE)
1249 		v->mode = TOG_VIEW_SPLIT_VERT;
1250 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1251 		err = offset_selection_down(v);
1252 		if (err)
1253 			return err;
1254 		err = offset_selection_down(v->child);
1255 		if (err)
1256 			return err;
1257 	} else {
1258 		offset_selection_up(v);
1259 		offset_selection_up(v->child);
1260 	}
1261 	if (v->resize)
1262 		err = v->resize(v, 0);
1263 	else if (v->child->resize)
1264 		err = v->child->resize(v->child, 0);
1265 
1266 	return err;
1267 }
1268 
1269 /*
1270  * Compute view->count from numeric input. Assign total to view->count and
1271  * return first non-numeric key entered.
1272  */
1273 static int
1274 get_compound_key(struct tog_view *view, int c)
1275 {
1276 	struct tog_view	*v = view;
1277 	int		 x, n = 0;
1278 
1279 	if (view_is_hsplit_top(view))
1280 		v = view->child;
1281 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1282 		v = view->parent;
1283 
1284 	view->count = 0;
1285 	cbreak();  /* block for input */
1286 	nodelay(view->window, FALSE);
1287 	wmove(v->window, v->nlines - 1, 0);
1288 	wclrtoeol(v->window);
1289 	waddch(v->window, ':');
1290 
1291 	do {
1292 		x = getcurx(v->window);
1293 		if (x != ERR && x < view->ncols) {
1294 			waddch(v->window, c);
1295 			wrefresh(v->window);
1296 		}
1297 
1298 		/*
1299 		 * Don't overflow. Max valid request should be the greatest
1300 		 * between the longest and total lines; cap at 10 million.
1301 		 */
1302 		if (n >= 9999999)
1303 			n = 9999999;
1304 		else
1305 			n = n * 10 + (c - '0');
1306 	} while (((c = wgetch(view->window))) >= '0' && c <= '9' && c != ERR);
1307 
1308 	if (c == 'G' || c == 'g') {	/* nG key map */
1309 		view->gline = view->hiline = n;
1310 		n = 0;
1311 		c = 0;
1312 	}
1313 
1314 	/* Massage excessive or inapplicable values at the input handler. */
1315 	view->count = n;
1316 
1317 	return c;
1318 }
1319 
1320 static const struct got_error *
1321 view_input(struct tog_view **new, int *done, struct tog_view *view,
1322     struct tog_view_list_head *views)
1323 {
1324 	const struct got_error *err = NULL;
1325 	struct tog_view *v;
1326 	int ch, errcode;
1327 
1328 	*new = NULL;
1329 
1330 	/* Clear "no matches" indicator. */
1331 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
1332 	    view->search_next_done == TOG_SEARCH_HAVE_NONE) {
1333 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
1334 		view->count = 0;
1335 	}
1336 
1337 	if (view->searching && !view->search_next_done) {
1338 		errcode = pthread_mutex_unlock(&tog_mutex);
1339 		if (errcode)
1340 			return got_error_set_errno(errcode,
1341 			    "pthread_mutex_unlock");
1342 		sched_yield();
1343 		errcode = pthread_mutex_lock(&tog_mutex);
1344 		if (errcode)
1345 			return got_error_set_errno(errcode,
1346 			    "pthread_mutex_lock");
1347 		view->search_next(view);
1348 		return NULL;
1349 	}
1350 
1351 	/* Allow threads to make progress while we are waiting for input. */
1352 	errcode = pthread_mutex_unlock(&tog_mutex);
1353 	if (errcode)
1354 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
1355 	/* If we have an unfinished count, let C-g or backspace abort. */
1356 	if (view->count && --view->count) {
1357 		cbreak();
1358 		nodelay(view->window, TRUE);
1359 		ch = wgetch(view->window);
1360 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
1361 			view->count = 0;
1362 		else
1363 			ch = view->ch;
1364 	} else {
1365 		ch = wgetch(view->window);
1366 		if (ch >= '1' && ch  <= '9')
1367 			view->ch = ch = get_compound_key(view, ch);
1368 	}
1369 	if (view->hiline && ch != ERR && ch != 0)
1370 		view->hiline = 0;  /* key pressed, clear line highlight */
1371 	nodelay(view->window, TRUE);
1372 	errcode = pthread_mutex_lock(&tog_mutex);
1373 	if (errcode)
1374 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1375 
1376 	if (tog_sigwinch_received || tog_sigcont_received) {
1377 		tog_resizeterm();
1378 		tog_sigwinch_received = 0;
1379 		tog_sigcont_received = 0;
1380 		TAILQ_FOREACH(v, views, entry) {
1381 			err = view_resize(v);
1382 			if (err)
1383 				return err;
1384 			err = v->input(new, v, KEY_RESIZE);
1385 			if (err)
1386 				return err;
1387 			if (v->child) {
1388 				err = view_resize(v->child);
1389 				if (err)
1390 					return err;
1391 				err = v->child->input(new, v->child,
1392 				    KEY_RESIZE);
1393 				if (err)
1394 					return err;
1395 				if (v->child->resized_x || v->child->resized_y) {
1396 					err = view_resize_split(v, 0);
1397 					if (err)
1398 						return err;
1399 				}
1400 			}
1401 		}
1402 	}
1403 
1404 	switch (ch) {
1405 	case '\t':
1406 		view->count = 0;
1407 		if (view->child) {
1408 			view->focussed = 0;
1409 			view->child->focussed = 1;
1410 			view->focus_child = 1;
1411 		} else if (view->parent) {
1412 			view->focussed = 0;
1413 			view->parent->focussed = 1;
1414 			view->parent->focus_child = 0;
1415 			if (!view_is_splitscreen(view)) {
1416 				if (view->parent->resize) {
1417 					err = view->parent->resize(view->parent,
1418 					    0);
1419 					if (err)
1420 						return err;
1421 				}
1422 				offset_selection_up(view->parent);
1423 				err = view_fullscreen(view->parent);
1424 				if (err)
1425 					return err;
1426 			}
1427 		}
1428 		break;
1429 	case 'q':
1430 		if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN) {
1431 			if (view->parent->resize) {
1432 				/* might need more commits to fill fullscreen */
1433 				err = view->parent->resize(view->parent, 0);
1434 				if (err)
1435 					break;
1436 			}
1437 			offset_selection_up(view->parent);
1438 		}
1439 		err = view->input(new, view, ch);
1440 		view->dying = 1;
1441 		break;
1442 	case 'Q':
1443 		*done = 1;
1444 		break;
1445 	case 'F':
1446 		view->count = 0;
1447 		if (view_is_parent_view(view)) {
1448 			if (view->child == NULL)
1449 				break;
1450 			if (view_is_splitscreen(view->child)) {
1451 				view->focussed = 0;
1452 				view->child->focussed = 1;
1453 				err = view_fullscreen(view->child);
1454 			} else {
1455 				err = view_splitscreen(view->child);
1456 				if (!err)
1457 					err = view_resize_split(view, 0);
1458 			}
1459 			if (err)
1460 				break;
1461 			err = view->child->input(new, view->child,
1462 			    KEY_RESIZE);
1463 		} else {
1464 			if (view_is_splitscreen(view)) {
1465 				view->parent->focussed = 0;
1466 				view->focussed = 1;
1467 				err = view_fullscreen(view);
1468 			} else {
1469 				err = view_splitscreen(view);
1470 				if (!err && view->mode != TOG_VIEW_SPLIT_HRZN)
1471 					err = view_resize(view->parent);
1472 				if (!err)
1473 					err = view_resize_split(view, 0);
1474 			}
1475 			if (err)
1476 				break;
1477 			err = view->input(new, view, KEY_RESIZE);
1478 		}
1479 		if (err)
1480 			break;
1481 		if (view->resize) {
1482 			err = view->resize(view, 0);
1483 			if (err)
1484 				break;
1485 		}
1486 		if (view->parent)
1487 			err = offset_selection_down(view->parent);
1488 		if (!err)
1489 			err = offset_selection_down(view);
1490 		break;
1491 	case 'S':
1492 		view->count = 0;
1493 		err = switch_split(view);
1494 		break;
1495 	case '-':
1496 		err = view_resize_split(view, -1);
1497 		break;
1498 	case '+':
1499 		err = view_resize_split(view, 1);
1500 		break;
1501 	case KEY_RESIZE:
1502 		break;
1503 	case '/':
1504 		view->count = 0;
1505 		if (view->search_start)
1506 			view_search_start(view);
1507 		else
1508 			err = view->input(new, view, ch);
1509 		break;
1510 	case 'N':
1511 	case 'n':
1512 		if (view->search_started && view->search_next) {
1513 			view->searching = (ch == 'n' ?
1514 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1515 			view->search_next_done = 0;
1516 			view->search_next(view);
1517 		} else
1518 			err = view->input(new, view, ch);
1519 		break;
1520 	case 'A':
1521 		if (tog_diff_algo == GOT_DIFF_ALGORITHM_MYERS)
1522 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
1523 		else
1524 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
1525 		TAILQ_FOREACH(v, views, entry) {
1526 			if (v->reset) {
1527 				err = v->reset(v);
1528 				if (err)
1529 					return err;
1530 			}
1531 			if (v->child && v->child->reset) {
1532 				err = v->child->reset(v->child);
1533 				if (err)
1534 					return err;
1535 			}
1536 		}
1537 		break;
1538 	default:
1539 		err = view->input(new, view, ch);
1540 		break;
1541 	}
1542 
1543 	return err;
1544 }
1545 
1546 static int
1547 view_needs_focus_indication(struct tog_view *view)
1548 {
1549 	if (view_is_parent_view(view)) {
1550 		if (view->child == NULL || view->child->focussed)
1551 			return 0;
1552 		if (!view_is_splitscreen(view->child))
1553 			return 0;
1554 	} else if (!view_is_splitscreen(view))
1555 		return 0;
1556 
1557 	return view->focussed;
1558 }
1559 
1560 static const struct got_error *
1561 view_loop(struct tog_view *view)
1562 {
1563 	const struct got_error *err = NULL;
1564 	struct tog_view_list_head views;
1565 	struct tog_view *new_view;
1566 	char *mode;
1567 	int fast_refresh = 10;
1568 	int done = 0, errcode;
1569 
1570 	mode = getenv("TOG_VIEW_SPLIT_MODE");
1571 	if (!mode || !(*mode == 'h' || *mode == 'H'))
1572 		view->mode = TOG_VIEW_SPLIT_VERT;
1573 	else
1574 		view->mode = TOG_VIEW_SPLIT_HRZN;
1575 
1576 	errcode = pthread_mutex_lock(&tog_mutex);
1577 	if (errcode)
1578 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1579 
1580 	TAILQ_INIT(&views);
1581 	TAILQ_INSERT_HEAD(&views, view, entry);
1582 
1583 	view->focussed = 1;
1584 	err = view->show(view);
1585 	if (err)
1586 		return err;
1587 	update_panels();
1588 	doupdate();
1589 	while (!TAILQ_EMPTY(&views) && !done && !tog_thread_error &&
1590 	    !tog_fatal_signal_received()) {
1591 		/* Refresh fast during initialization, then become slower. */
1592 		if (fast_refresh && fast_refresh-- == 0)
1593 			halfdelay(10); /* switch to once per second */
1594 
1595 		err = view_input(&new_view, &done, view, &views);
1596 		if (err)
1597 			break;
1598 		if (view->dying) {
1599 			struct tog_view *v, *prev = NULL;
1600 
1601 			if (view_is_parent_view(view))
1602 				prev = TAILQ_PREV(view, tog_view_list_head,
1603 				    entry);
1604 			else if (view->parent)
1605 				prev = view->parent;
1606 
1607 			if (view->parent) {
1608 				view->parent->child = NULL;
1609 				view->parent->focus_child = 0;
1610 				/* Restore fullscreen line height. */
1611 				view->parent->nlines = view->parent->lines;
1612 				err = view_resize(view->parent);
1613 				if (err)
1614 					break;
1615 				/* Make resized splits persist. */
1616 				view_transfer_size(view->parent, view);
1617 			} else
1618 				TAILQ_REMOVE(&views, view, entry);
1619 
1620 			err = view_close(view);
1621 			if (err)
1622 				goto done;
1623 
1624 			view = NULL;
1625 			TAILQ_FOREACH(v, &views, entry) {
1626 				if (v->focussed)
1627 					break;
1628 			}
1629 			if (view == NULL && new_view == NULL) {
1630 				/* No view has focus. Try to pick one. */
1631 				if (prev)
1632 					view = prev;
1633 				else if (!TAILQ_EMPTY(&views)) {
1634 					view = TAILQ_LAST(&views,
1635 					    tog_view_list_head);
1636 				}
1637 				if (view) {
1638 					if (view->focus_child) {
1639 						view->child->focussed = 1;
1640 						view = view->child;
1641 					} else
1642 						view->focussed = 1;
1643 				}
1644 			}
1645 		}
1646 		if (new_view) {
1647 			struct tog_view *v, *t;
1648 			/* Only allow one parent view per type. */
1649 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1650 				if (v->type != new_view->type)
1651 					continue;
1652 				TAILQ_REMOVE(&views, v, entry);
1653 				err = view_close(v);
1654 				if (err)
1655 					goto done;
1656 				break;
1657 			}
1658 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1659 			view = new_view;
1660 		}
1661 		if (view) {
1662 			if (view_is_parent_view(view)) {
1663 				if (view->child && view->child->focussed)
1664 					view = view->child;
1665 			} else {
1666 				if (view->parent && view->parent->focussed)
1667 					view = view->parent;
1668 			}
1669 			show_panel(view->panel);
1670 			if (view->child && view_is_splitscreen(view->child))
1671 				show_panel(view->child->panel);
1672 			if (view->parent && view_is_splitscreen(view)) {
1673 				err = view->parent->show(view->parent);
1674 				if (err)
1675 					goto done;
1676 			}
1677 			err = view->show(view);
1678 			if (err)
1679 				goto done;
1680 			if (view->child) {
1681 				err = view->child->show(view->child);
1682 				if (err)
1683 					goto done;
1684 			}
1685 			update_panels();
1686 			doupdate();
1687 		}
1688 	}
1689 done:
1690 	while (!TAILQ_EMPTY(&views)) {
1691 		const struct got_error *close_err;
1692 		view = TAILQ_FIRST(&views);
1693 		TAILQ_REMOVE(&views, view, entry);
1694 		close_err = view_close(view);
1695 		if (close_err && err == NULL)
1696 			err = close_err;
1697 	}
1698 
1699 	errcode = pthread_mutex_unlock(&tog_mutex);
1700 	if (errcode && err == NULL)
1701 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1702 
1703 	return err;
1704 }
1705 
1706 __dead static void
1707 usage_log(void)
1708 {
1709 	endwin();
1710 	fprintf(stderr,
1711 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1712 	    getprogname());
1713 	exit(1);
1714 }
1715 
1716 /* Create newly allocated wide-character string equivalent to a byte string. */
1717 static const struct got_error *
1718 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1719 {
1720 	char *vis = NULL;
1721 	const struct got_error *err = NULL;
1722 
1723 	*ws = NULL;
1724 	*wlen = mbstowcs(NULL, s, 0);
1725 	if (*wlen == (size_t)-1) {
1726 		int vislen;
1727 		if (errno != EILSEQ)
1728 			return got_error_from_errno("mbstowcs");
1729 
1730 		/* byte string invalid in current encoding; try to "fix" it */
1731 		err = got_mbsavis(&vis, &vislen, s);
1732 		if (err)
1733 			return err;
1734 		*wlen = mbstowcs(NULL, vis, 0);
1735 		if (*wlen == (size_t)-1) {
1736 			err = got_error_from_errno("mbstowcs"); /* give up */
1737 			goto done;
1738 		}
1739 	}
1740 
1741 	*ws = calloc(*wlen + 1, sizeof(**ws));
1742 	if (*ws == NULL) {
1743 		err = got_error_from_errno("calloc");
1744 		goto done;
1745 	}
1746 
1747 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1748 		err = got_error_from_errno("mbstowcs");
1749 done:
1750 	free(vis);
1751 	if (err) {
1752 		free(*ws);
1753 		*ws = NULL;
1754 		*wlen = 0;
1755 	}
1756 	return err;
1757 }
1758 
1759 static const struct got_error *
1760 expand_tab(char **ptr, const char *src)
1761 {
1762 	char	*dst;
1763 	size_t	 len, n, idx = 0, sz = 0;
1764 
1765 	*ptr = NULL;
1766 	n = len = strlen(src);
1767 	dst = malloc(n + 1);
1768 	if (dst == NULL)
1769 		return got_error_from_errno("malloc");
1770 
1771 	while (idx < len && src[idx]) {
1772 		const char c = src[idx];
1773 
1774 		if (c == '\t') {
1775 			size_t nb = TABSIZE - sz % TABSIZE;
1776 			char *p;
1777 
1778 			p = realloc(dst, n + nb);
1779 			if (p == NULL) {
1780 				free(dst);
1781 				return got_error_from_errno("realloc");
1782 
1783 			}
1784 			dst = p;
1785 			n += nb;
1786 			memset(dst + sz, ' ', nb);
1787 			sz += nb;
1788 		} else
1789 			dst[sz++] = src[idx];
1790 		++idx;
1791 	}
1792 
1793 	dst[sz] = '\0';
1794 	*ptr = dst;
1795 	return NULL;
1796 }
1797 
1798 /*
1799  * Advance at most n columns from wline starting at offset off.
1800  * Return the index to the first character after the span operation.
1801  * Return the combined column width of all spanned wide character in
1802  * *rcol.
1803  */
1804 static int
1805 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1806 {
1807 	int width, i, cols = 0;
1808 
1809 	if (n == 0) {
1810 		*rcol = cols;
1811 		return off;
1812 	}
1813 
1814 	for (i = off; wline[i] != L'\0'; ++i) {
1815 		if (wline[i] == L'\t')
1816 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1817 		else
1818 			width = wcwidth(wline[i]);
1819 
1820 		if (width == -1) {
1821 			width = 1;
1822 			wline[i] = L'.';
1823 		}
1824 
1825 		if (cols + width > n)
1826 			break;
1827 		cols += width;
1828 	}
1829 
1830 	*rcol = cols;
1831 	return i;
1832 }
1833 
1834 /*
1835  * Format a line for display, ensuring that it won't overflow a width limit.
1836  * With scrolling, the width returned refers to the scrolled version of the
1837  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1838  */
1839 static const struct got_error *
1840 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1841     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1842 {
1843 	const struct got_error *err = NULL;
1844 	int cols;
1845 	wchar_t *wline = NULL;
1846 	char *exstr = NULL;
1847 	size_t wlen;
1848 	int i, scrollx;
1849 
1850 	*wlinep = NULL;
1851 	*widthp = 0;
1852 
1853 	if (expand) {
1854 		err = expand_tab(&exstr, line);
1855 		if (err)
1856 			return err;
1857 	}
1858 
1859 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1860 	free(exstr);
1861 	if (err)
1862 		return err;
1863 
1864 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1865 
1866 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1867 		wline[wlen - 1] = L'\0';
1868 		wlen--;
1869 	}
1870 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1871 		wline[wlen - 1] = L'\0';
1872 		wlen--;
1873 	}
1874 
1875 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1876 	wline[i] = L'\0';
1877 
1878 	if (widthp)
1879 		*widthp = cols;
1880 	if (scrollxp)
1881 		*scrollxp = scrollx;
1882 	if (err)
1883 		free(wline);
1884 	else
1885 		*wlinep = wline;
1886 	return err;
1887 }
1888 
1889 static const struct got_error*
1890 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1891     struct got_object_id *id, struct got_repository *repo)
1892 {
1893 	static const struct got_error *err = NULL;
1894 	struct got_reflist_entry *re;
1895 	char *s;
1896 	const char *name;
1897 
1898 	*refs_str = NULL;
1899 
1900 	TAILQ_FOREACH(re, refs, entry) {
1901 		struct got_tag_object *tag = NULL;
1902 		struct got_object_id *ref_id;
1903 		int cmp;
1904 
1905 		name = got_ref_get_name(re->ref);
1906 		if (strcmp(name, GOT_REF_HEAD) == 0)
1907 			continue;
1908 		if (strncmp(name, "refs/", 5) == 0)
1909 			name += 5;
1910 		if (strncmp(name, "got/", 4) == 0 &&
1911 		    strncmp(name, "got/backup/", 11) != 0)
1912 			continue;
1913 		if (strncmp(name, "heads/", 6) == 0)
1914 			name += 6;
1915 		if (strncmp(name, "remotes/", 8) == 0) {
1916 			name += 8;
1917 			s = strstr(name, "/" GOT_REF_HEAD);
1918 			if (s != NULL && s[strlen(s)] == '\0')
1919 				continue;
1920 		}
1921 		err = got_ref_resolve(&ref_id, repo, re->ref);
1922 		if (err)
1923 			break;
1924 		if (strncmp(name, "tags/", 5) == 0) {
1925 			err = got_object_open_as_tag(&tag, repo, ref_id);
1926 			if (err) {
1927 				if (err->code != GOT_ERR_OBJ_TYPE) {
1928 					free(ref_id);
1929 					break;
1930 				}
1931 				/* Ref points at something other than a tag. */
1932 				err = NULL;
1933 				tag = NULL;
1934 			}
1935 		}
1936 		cmp = got_object_id_cmp(tag ?
1937 		    got_object_tag_get_object_id(tag) : ref_id, id);
1938 		free(ref_id);
1939 		if (tag)
1940 			got_object_tag_close(tag);
1941 		if (cmp != 0)
1942 			continue;
1943 		s = *refs_str;
1944 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1945 		    s ? ", " : "", name) == -1) {
1946 			err = got_error_from_errno("asprintf");
1947 			free(s);
1948 			*refs_str = NULL;
1949 			break;
1950 		}
1951 		free(s);
1952 	}
1953 
1954 	return err;
1955 }
1956 
1957 static const struct got_error *
1958 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1959     int col_tab_align)
1960 {
1961 	char *smallerthan;
1962 
1963 	smallerthan = strchr(author, '<');
1964 	if (smallerthan && smallerthan[1] != '\0')
1965 		author = smallerthan + 1;
1966 	author[strcspn(author, "@>")] = '\0';
1967 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1968 	    col_tab_align, 0);
1969 }
1970 
1971 static const struct got_error *
1972 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1973     struct got_object_id *id, const size_t date_display_cols,
1974     int author_display_cols)
1975 {
1976 	struct tog_log_view_state *s = &view->state.log;
1977 	const struct got_error *err = NULL;
1978 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1979 	char *logmsg0 = NULL, *logmsg = NULL;
1980 	char *author = NULL;
1981 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1982 	int author_width, logmsg_width;
1983 	char *newline, *line = NULL;
1984 	int col, limit, scrollx;
1985 	const int avail = view->ncols;
1986 	struct tm tm;
1987 	time_t committer_time;
1988 	struct tog_color *tc;
1989 
1990 	committer_time = got_object_commit_get_committer_time(commit);
1991 	if (gmtime_r(&committer_time, &tm) == NULL)
1992 		return got_error_from_errno("gmtime_r");
1993 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1994 		return got_error(GOT_ERR_NO_SPACE);
1995 
1996 	if (avail <= date_display_cols)
1997 		limit = MIN(sizeof(datebuf) - 1, avail);
1998 	else
1999 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
2000 	tc = get_color(&s->colors, TOG_COLOR_DATE);
2001 	if (tc)
2002 		wattr_on(view->window,
2003 		    COLOR_PAIR(tc->colorpair), NULL);
2004 	waddnstr(view->window, datebuf, limit);
2005 	if (tc)
2006 		wattr_off(view->window,
2007 		    COLOR_PAIR(tc->colorpair), NULL);
2008 	col = limit;
2009 	if (col > avail)
2010 		goto done;
2011 
2012 	if (avail >= 120) {
2013 		char *id_str;
2014 		err = got_object_id_str(&id_str, id);
2015 		if (err)
2016 			goto done;
2017 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2018 		if (tc)
2019 			wattr_on(view->window,
2020 			    COLOR_PAIR(tc->colorpair), NULL);
2021 		wprintw(view->window, "%.8s ", id_str);
2022 		if (tc)
2023 			wattr_off(view->window,
2024 			    COLOR_PAIR(tc->colorpair), NULL);
2025 		free(id_str);
2026 		col += 9;
2027 		if (col > avail)
2028 			goto done;
2029 	}
2030 
2031 	if (s->use_committer)
2032 		author = strdup(got_object_commit_get_committer(commit));
2033 	else
2034 		author = strdup(got_object_commit_get_author(commit));
2035 	if (author == NULL) {
2036 		err = got_error_from_errno("strdup");
2037 		goto done;
2038 	}
2039 	err = format_author(&wauthor, &author_width, author, avail - col, col);
2040 	if (err)
2041 		goto done;
2042 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
2043 	if (tc)
2044 		wattr_on(view->window,
2045 		    COLOR_PAIR(tc->colorpair), NULL);
2046 	waddwstr(view->window, wauthor);
2047 	if (tc)
2048 		wattr_off(view->window,
2049 		    COLOR_PAIR(tc->colorpair), NULL);
2050 	col += author_width;
2051 	while (col < avail && author_width < author_display_cols + 2) {
2052 		waddch(view->window, ' ');
2053 		col++;
2054 		author_width++;
2055 	}
2056 	if (col > avail)
2057 		goto done;
2058 
2059 	err = got_object_commit_get_logmsg(&logmsg0, commit);
2060 	if (err)
2061 		goto done;
2062 	logmsg = logmsg0;
2063 	while (*logmsg == '\n')
2064 		logmsg++;
2065 	newline = strchr(logmsg, '\n');
2066 	if (newline)
2067 		*newline = '\0';
2068 	limit = avail - col;
2069 	if (view->child && !view_is_hsplit_top(view) && limit > 0)
2070 		limit--;	/* for the border */
2071 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
2072 	    limit, col, 1);
2073 	if (err)
2074 		goto done;
2075 	waddwstr(view->window, &wlogmsg[scrollx]);
2076 	col += MAX(logmsg_width, 0);
2077 	while (col < avail) {
2078 		waddch(view->window, ' ');
2079 		col++;
2080 	}
2081 done:
2082 	free(logmsg0);
2083 	free(wlogmsg);
2084 	free(author);
2085 	free(wauthor);
2086 	free(line);
2087 	return err;
2088 }
2089 
2090 static struct commit_queue_entry *
2091 alloc_commit_queue_entry(struct got_commit_object *commit,
2092     struct got_object_id *id)
2093 {
2094 	struct commit_queue_entry *entry;
2095 
2096 	entry = calloc(1, sizeof(*entry));
2097 	if (entry == NULL)
2098 		return NULL;
2099 
2100 	entry->id = id;
2101 	entry->commit = commit;
2102 	return entry;
2103 }
2104 
2105 static void
2106 pop_commit(struct commit_queue *commits)
2107 {
2108 	struct commit_queue_entry *entry;
2109 
2110 	entry = TAILQ_FIRST(&commits->head);
2111 	TAILQ_REMOVE(&commits->head, entry, entry);
2112 	got_object_commit_close(entry->commit);
2113 	commits->ncommits--;
2114 	/* Don't free entry->id! It is owned by the commit graph. */
2115 	free(entry);
2116 }
2117 
2118 static void
2119 free_commits(struct commit_queue *commits)
2120 {
2121 	while (!TAILQ_EMPTY(&commits->head))
2122 		pop_commit(commits);
2123 }
2124 
2125 static const struct got_error *
2126 match_commit(int *have_match, struct got_object_id *id,
2127     struct got_commit_object *commit, regex_t *regex)
2128 {
2129 	const struct got_error *err = NULL;
2130 	regmatch_t regmatch;
2131 	char *id_str = NULL, *logmsg = NULL;
2132 
2133 	*have_match = 0;
2134 
2135 	err = got_object_id_str(&id_str, id);
2136 	if (err)
2137 		return err;
2138 
2139 	err = got_object_commit_get_logmsg(&logmsg, commit);
2140 	if (err)
2141 		goto done;
2142 
2143 	if (regexec(regex, got_object_commit_get_author(commit), 1,
2144 	    &regmatch, 0) == 0 ||
2145 	    regexec(regex, got_object_commit_get_committer(commit), 1,
2146 	    &regmatch, 0) == 0 ||
2147 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
2148 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
2149 		*have_match = 1;
2150 done:
2151 	free(id_str);
2152 	free(logmsg);
2153 	return err;
2154 }
2155 
2156 static const struct got_error *
2157 queue_commits(struct tog_log_thread_args *a)
2158 {
2159 	const struct got_error *err = NULL;
2160 
2161 	/*
2162 	 * We keep all commits open throughout the lifetime of the log
2163 	 * view in order to avoid having to re-fetch commits from disk
2164 	 * while updating the display.
2165 	 */
2166 	do {
2167 		struct got_object_id *id;
2168 		struct got_commit_object *commit;
2169 		struct commit_queue_entry *entry;
2170 		int errcode;
2171 
2172 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
2173 		    NULL, NULL);
2174 		if (err || id == NULL)
2175 			break;
2176 
2177 		err = got_object_open_as_commit(&commit, a->repo, id);
2178 		if (err)
2179 			break;
2180 		entry = alloc_commit_queue_entry(commit, id);
2181 		if (entry == NULL) {
2182 			err = got_error_from_errno("alloc_commit_queue_entry");
2183 			break;
2184 		}
2185 
2186 		errcode = pthread_mutex_lock(&tog_mutex);
2187 		if (errcode) {
2188 			err = got_error_set_errno(errcode,
2189 			    "pthread_mutex_lock");
2190 			break;
2191 		}
2192 
2193 		entry->idx = a->commits->ncommits;
2194 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
2195 		a->commits->ncommits++;
2196 
2197 		if (*a->searching == TOG_SEARCH_FORWARD &&
2198 		    !*a->search_next_done) {
2199 			int have_match;
2200 			err = match_commit(&have_match, id, commit, a->regex);
2201 			if (err)
2202 				break;
2203 			if (have_match)
2204 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
2205 		}
2206 
2207 		errcode = pthread_mutex_unlock(&tog_mutex);
2208 		if (errcode && err == NULL)
2209 			err = got_error_set_errno(errcode,
2210 			    "pthread_mutex_unlock");
2211 		if (err)
2212 			break;
2213 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
2214 
2215 	return err;
2216 }
2217 
2218 static void
2219 select_commit(struct tog_log_view_state *s)
2220 {
2221 	struct commit_queue_entry *entry;
2222 	int ncommits = 0;
2223 
2224 	entry = s->first_displayed_entry;
2225 	while (entry) {
2226 		if (ncommits == s->selected) {
2227 			s->selected_entry = entry;
2228 			break;
2229 		}
2230 		entry = TAILQ_NEXT(entry, entry);
2231 		ncommits++;
2232 	}
2233 }
2234 
2235 static const struct got_error *
2236 draw_commits(struct tog_view *view)
2237 {
2238 	const struct got_error *err = NULL;
2239 	struct tog_log_view_state *s = &view->state.log;
2240 	struct commit_queue_entry *entry = s->selected_entry;
2241 	int limit = view->nlines;
2242 	int width;
2243 	int ncommits, author_cols = 4;
2244 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
2245 	char *refs_str = NULL;
2246 	wchar_t *wline;
2247 	struct tog_color *tc;
2248 	static const size_t date_display_cols = 12;
2249 
2250 	if (view_is_hsplit_top(view))
2251 		--limit;  /* account for border */
2252 
2253 	if (s->selected_entry &&
2254 	    !(view->searching && view->search_next_done == 0)) {
2255 		struct got_reflist_head *refs;
2256 		err = got_object_id_str(&id_str, s->selected_entry->id);
2257 		if (err)
2258 			return err;
2259 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
2260 		    s->selected_entry->id);
2261 		if (refs) {
2262 			err = build_refs_str(&refs_str, refs,
2263 			    s->selected_entry->id, s->repo);
2264 			if (err)
2265 				goto done;
2266 		}
2267 	}
2268 
2269 	if (s->thread_args.commits_needed == 0)
2270 		halfdelay(10); /* disable fast refresh */
2271 
2272 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
2273 		if (asprintf(&ncommits_str, " [%d/%d] %s",
2274 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
2275 		    (view->searching && !view->search_next_done) ?
2276 		    "searching..." : "loading...") == -1) {
2277 			err = got_error_from_errno("asprintf");
2278 			goto done;
2279 		}
2280 	} else {
2281 		const char *search_str = NULL;
2282 
2283 		if (view->searching) {
2284 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
2285 				search_str = "no more matches";
2286 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
2287 				search_str = "no matches found";
2288 			else if (!view->search_next_done)
2289 				search_str = "searching...";
2290 		}
2291 
2292 		if (asprintf(&ncommits_str, " [%d/%d] %s",
2293 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
2294 		    search_str ? search_str :
2295 		    (refs_str ? refs_str : "")) == -1) {
2296 			err = got_error_from_errno("asprintf");
2297 			goto done;
2298 		}
2299 	}
2300 
2301 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
2302 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
2303 		    "........................................",
2304 		    s->in_repo_path, ncommits_str) == -1) {
2305 			err = got_error_from_errno("asprintf");
2306 			header = NULL;
2307 			goto done;
2308 		}
2309 	} else if (asprintf(&header, "commit %s%s",
2310 	    id_str ? id_str : "........................................",
2311 	    ncommits_str) == -1) {
2312 		err = got_error_from_errno("asprintf");
2313 		header = NULL;
2314 		goto done;
2315 	}
2316 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
2317 	if (err)
2318 		goto done;
2319 
2320 	werase(view->window);
2321 
2322 	if (view_needs_focus_indication(view))
2323 		wstandout(view->window);
2324 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2325 	if (tc)
2326 		wattr_on(view->window,
2327 		    COLOR_PAIR(tc->colorpair), NULL);
2328 	waddwstr(view->window, wline);
2329 	if (tc)
2330 		wattr_off(view->window,
2331 		    COLOR_PAIR(tc->colorpair), NULL);
2332 	while (width < view->ncols) {
2333 		waddch(view->window, ' ');
2334 		width++;
2335 	}
2336 	if (view_needs_focus_indication(view))
2337 		wstandend(view->window);
2338 	free(wline);
2339 	if (limit <= 1)
2340 		goto done;
2341 
2342 	/* Grow author column size if necessary, and set view->maxx. */
2343 	entry = s->first_displayed_entry;
2344 	ncommits = 0;
2345 	view->maxx = 0;
2346 	while (entry) {
2347 		struct got_commit_object *c = entry->commit;
2348 		char *author, *eol, *msg, *msg0;
2349 		wchar_t *wauthor, *wmsg;
2350 		int width;
2351 		if (ncommits >= limit - 1)
2352 			break;
2353 		if (s->use_committer)
2354 			author = strdup(got_object_commit_get_committer(c));
2355 		else
2356 			author = strdup(got_object_commit_get_author(c));
2357 		if (author == NULL) {
2358 			err = got_error_from_errno("strdup");
2359 			goto done;
2360 		}
2361 		err = format_author(&wauthor, &width, author, COLS,
2362 		    date_display_cols);
2363 		if (author_cols < width)
2364 			author_cols = width;
2365 		free(wauthor);
2366 		free(author);
2367 		if (err)
2368 			goto done;
2369 		err = got_object_commit_get_logmsg(&msg0, c);
2370 		if (err)
2371 			goto done;
2372 		msg = msg0;
2373 		while (*msg == '\n')
2374 			++msg;
2375 		if ((eol = strchr(msg, '\n')))
2376 			*eol = '\0';
2377 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
2378 		    date_display_cols + author_cols, 0);
2379 		if (err)
2380 			goto done;
2381 		view->maxx = MAX(view->maxx, width);
2382 		free(msg0);
2383 		free(wmsg);
2384 		ncommits++;
2385 		entry = TAILQ_NEXT(entry, entry);
2386 	}
2387 
2388 	entry = s->first_displayed_entry;
2389 	s->last_displayed_entry = s->first_displayed_entry;
2390 	ncommits = 0;
2391 	while (entry) {
2392 		if (ncommits >= limit - 1)
2393 			break;
2394 		if (ncommits == s->selected)
2395 			wstandout(view->window);
2396 		err = draw_commit(view, entry->commit, entry->id,
2397 		    date_display_cols, author_cols);
2398 		if (ncommits == s->selected)
2399 			wstandend(view->window);
2400 		if (err)
2401 			goto done;
2402 		ncommits++;
2403 		s->last_displayed_entry = entry;
2404 		entry = TAILQ_NEXT(entry, entry);
2405 	}
2406 
2407 	view_border(view);
2408 done:
2409 	free(id_str);
2410 	free(refs_str);
2411 	free(ncommits_str);
2412 	free(header);
2413 	return err;
2414 }
2415 
2416 static void
2417 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
2418 {
2419 	struct commit_queue_entry *entry;
2420 	int nscrolled = 0;
2421 
2422 	entry = TAILQ_FIRST(&s->commits.head);
2423 	if (s->first_displayed_entry == entry)
2424 		return;
2425 
2426 	entry = s->first_displayed_entry;
2427 	while (entry && nscrolled < maxscroll) {
2428 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
2429 		if (entry) {
2430 			s->first_displayed_entry = entry;
2431 			nscrolled++;
2432 		}
2433 	}
2434 }
2435 
2436 static const struct got_error *
2437 trigger_log_thread(struct tog_view *view, int wait)
2438 {
2439 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
2440 	int errcode;
2441 
2442 	halfdelay(1); /* fast refresh while loading commits */
2443 
2444 	while (!ta->log_complete && !tog_thread_error &&
2445 	    (ta->commits_needed > 0 || ta->load_all)) {
2446 		/* Wake the log thread. */
2447 		errcode = pthread_cond_signal(&ta->need_commits);
2448 		if (errcode)
2449 			return got_error_set_errno(errcode,
2450 			    "pthread_cond_signal");
2451 
2452 		/*
2453 		 * The mutex will be released while the view loop waits
2454 		 * in wgetch(), at which time the log thread will run.
2455 		 */
2456 		if (!wait)
2457 			break;
2458 
2459 		/* Display progress update in log view. */
2460 		show_log_view(view);
2461 		update_panels();
2462 		doupdate();
2463 
2464 		/* Wait right here while next commit is being loaded. */
2465 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
2466 		if (errcode)
2467 			return got_error_set_errno(errcode,
2468 			    "pthread_cond_wait");
2469 
2470 		/* Display progress update in log view. */
2471 		show_log_view(view);
2472 		update_panels();
2473 		doupdate();
2474 	}
2475 
2476 	return NULL;
2477 }
2478 
2479 static const struct got_error *
2480 request_log_commits(struct tog_view *view)
2481 {
2482 	struct tog_log_view_state	*state = &view->state.log;
2483 	const struct got_error		*err = NULL;
2484 
2485 	if (state->thread_args.log_complete)
2486 		return NULL;
2487 
2488 	state->thread_args.commits_needed += view->nscrolled;
2489 	err = trigger_log_thread(view, 1);
2490 	view->nscrolled = 0;
2491 
2492 	return err;
2493 }
2494 
2495 static const struct got_error *
2496 log_scroll_down(struct tog_view *view, int maxscroll)
2497 {
2498 	struct tog_log_view_state *s = &view->state.log;
2499 	const struct got_error *err = NULL;
2500 	struct commit_queue_entry *pentry;
2501 	int nscrolled = 0, ncommits_needed;
2502 
2503 	if (s->last_displayed_entry == NULL)
2504 		return NULL;
2505 
2506 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
2507 	if (s->commits.ncommits < ncommits_needed &&
2508 	    !s->thread_args.log_complete) {
2509 		/*
2510 		 * Ask the log thread for required amount of commits.
2511 		 */
2512 		s->thread_args.commits_needed +=
2513 		    ncommits_needed - s->commits.ncommits;
2514 		err = trigger_log_thread(view, 1);
2515 		if (err)
2516 			return err;
2517 	}
2518 
2519 	do {
2520 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
2521 		if (pentry == NULL && view->mode != TOG_VIEW_SPLIT_HRZN)
2522 			break;
2523 
2524 		s->last_displayed_entry = pentry ?
2525 		    pentry : s->last_displayed_entry;;
2526 
2527 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
2528 		if (pentry == NULL)
2529 			break;
2530 		s->first_displayed_entry = pentry;
2531 	} while (++nscrolled < maxscroll);
2532 
2533 	if (view->mode == TOG_VIEW_SPLIT_HRZN && !s->thread_args.log_complete)
2534 		view->nscrolled += nscrolled;
2535 	else
2536 		view->nscrolled = 0;
2537 
2538 	return err;
2539 }
2540 
2541 static const struct got_error *
2542 open_diff_view_for_commit(struct tog_view **new_view, int begin_y, int begin_x,
2543     struct got_commit_object *commit, struct got_object_id *commit_id,
2544     struct tog_view *log_view, struct got_repository *repo)
2545 {
2546 	const struct got_error *err;
2547 	struct got_object_qid *parent_id;
2548 	struct tog_view *diff_view;
2549 
2550 	diff_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_DIFF);
2551 	if (diff_view == NULL)
2552 		return got_error_from_errno("view_open");
2553 
2554 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2555 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2556 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2557 	if (err == NULL)
2558 		*new_view = diff_view;
2559 	return err;
2560 }
2561 
2562 static const struct got_error *
2563 tree_view_visit_subtree(struct tog_tree_view_state *s,
2564     struct got_tree_object *subtree)
2565 {
2566 	struct tog_parent_tree *parent;
2567 
2568 	parent = calloc(1, sizeof(*parent));
2569 	if (parent == NULL)
2570 		return got_error_from_errno("calloc");
2571 
2572 	parent->tree = s->tree;
2573 	parent->first_displayed_entry = s->first_displayed_entry;
2574 	parent->selected_entry = s->selected_entry;
2575 	parent->selected = s->selected;
2576 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2577 	s->tree = subtree;
2578 	s->selected = 0;
2579 	s->first_displayed_entry = NULL;
2580 	return NULL;
2581 }
2582 
2583 static const struct got_error *
2584 tree_view_walk_path(struct tog_tree_view_state *s,
2585     struct got_commit_object *commit, const char *path)
2586 {
2587 	const struct got_error *err = NULL;
2588 	struct got_tree_object *tree = NULL;
2589 	const char *p;
2590 	char *slash, *subpath = NULL;
2591 
2592 	/* Walk the path and open corresponding tree objects. */
2593 	p = path;
2594 	while (*p) {
2595 		struct got_tree_entry *te;
2596 		struct got_object_id *tree_id;
2597 		char *te_name;
2598 
2599 		while (p[0] == '/')
2600 			p++;
2601 
2602 		/* Ensure the correct subtree entry is selected. */
2603 		slash = strchr(p, '/');
2604 		if (slash == NULL)
2605 			te_name = strdup(p);
2606 		else
2607 			te_name = strndup(p, slash - p);
2608 		if (te_name == NULL) {
2609 			err = got_error_from_errno("strndup");
2610 			break;
2611 		}
2612 		te = got_object_tree_find_entry(s->tree, te_name);
2613 		if (te == NULL) {
2614 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2615 			free(te_name);
2616 			break;
2617 		}
2618 		free(te_name);
2619 		s->first_displayed_entry = s->selected_entry = te;
2620 
2621 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2622 			break; /* jump to this file's entry */
2623 
2624 		slash = strchr(p, '/');
2625 		if (slash)
2626 			subpath = strndup(path, slash - path);
2627 		else
2628 			subpath = strdup(path);
2629 		if (subpath == NULL) {
2630 			err = got_error_from_errno("strdup");
2631 			break;
2632 		}
2633 
2634 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2635 		    subpath);
2636 		if (err)
2637 			break;
2638 
2639 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2640 		free(tree_id);
2641 		if (err)
2642 			break;
2643 
2644 		err = tree_view_visit_subtree(s, tree);
2645 		if (err) {
2646 			got_object_tree_close(tree);
2647 			break;
2648 		}
2649 		if (slash == NULL)
2650 			break;
2651 		free(subpath);
2652 		subpath = NULL;
2653 		p = slash;
2654 	}
2655 
2656 	free(subpath);
2657 	return err;
2658 }
2659 
2660 static const struct got_error *
2661 browse_commit_tree(struct tog_view **new_view, int begin_y, int begin_x,
2662     struct commit_queue_entry *entry, const char *path,
2663     const char *head_ref_name, struct got_repository *repo)
2664 {
2665 	const struct got_error *err = NULL;
2666 	struct tog_tree_view_state *s;
2667 	struct tog_view *tree_view;
2668 
2669 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
2670 	if (tree_view == NULL)
2671 		return got_error_from_errno("view_open");
2672 
2673 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2674 	if (err)
2675 		return err;
2676 	s = &tree_view->state.tree;
2677 
2678 	*new_view = tree_view;
2679 
2680 	if (got_path_is_root_dir(path))
2681 		return NULL;
2682 
2683 	return tree_view_walk_path(s, entry->commit, path);
2684 }
2685 
2686 static const struct got_error *
2687 block_signals_used_by_main_thread(void)
2688 {
2689 	sigset_t sigset;
2690 	int errcode;
2691 
2692 	if (sigemptyset(&sigset) == -1)
2693 		return got_error_from_errno("sigemptyset");
2694 
2695 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2696 	if (sigaddset(&sigset, SIGWINCH) == -1)
2697 		return got_error_from_errno("sigaddset");
2698 	if (sigaddset(&sigset, SIGCONT) == -1)
2699 		return got_error_from_errno("sigaddset");
2700 	if (sigaddset(&sigset, SIGINT) == -1)
2701 		return got_error_from_errno("sigaddset");
2702 	if (sigaddset(&sigset, SIGTERM) == -1)
2703 		return got_error_from_errno("sigaddset");
2704 
2705 	/* ncurses handles SIGTSTP */
2706 	if (sigaddset(&sigset, SIGTSTP) == -1)
2707 		return got_error_from_errno("sigaddset");
2708 
2709 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2710 	if (errcode)
2711 		return got_error_set_errno(errcode, "pthread_sigmask");
2712 
2713 	return NULL;
2714 }
2715 
2716 static void *
2717 log_thread(void *arg)
2718 {
2719 	const struct got_error *err = NULL;
2720 	int errcode = 0;
2721 	struct tog_log_thread_args *a = arg;
2722 	int done = 0;
2723 
2724 	/*
2725 	 * Sync startup with main thread such that we begin our
2726 	 * work once view_input() has released the mutex.
2727 	 */
2728 	errcode = pthread_mutex_lock(&tog_mutex);
2729 	if (errcode) {
2730 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
2731 		return (void *)err;
2732 	}
2733 
2734 	err = block_signals_used_by_main_thread();
2735 	if (err) {
2736 		pthread_mutex_unlock(&tog_mutex);
2737 		goto done;
2738 	}
2739 
2740 	while (!done && !err && !tog_fatal_signal_received()) {
2741 		errcode = pthread_mutex_unlock(&tog_mutex);
2742 		if (errcode) {
2743 			err = got_error_set_errno(errcode,
2744 			    "pthread_mutex_unlock");
2745 			goto done;
2746 		}
2747 		err = queue_commits(a);
2748 		if (err) {
2749 			if (err->code != GOT_ERR_ITER_COMPLETED)
2750 				goto done;
2751 			err = NULL;
2752 			done = 1;
2753 		} else if (a->commits_needed > 0 && !a->load_all)
2754 			a->commits_needed--;
2755 
2756 		errcode = pthread_mutex_lock(&tog_mutex);
2757 		if (errcode) {
2758 			err = got_error_set_errno(errcode,
2759 			    "pthread_mutex_lock");
2760 			goto done;
2761 		} else if (*a->quit)
2762 			done = 1;
2763 		else if (*a->first_displayed_entry == NULL) {
2764 			*a->first_displayed_entry =
2765 			    TAILQ_FIRST(&a->commits->head);
2766 			*a->selected_entry = *a->first_displayed_entry;
2767 		}
2768 
2769 		errcode = pthread_cond_signal(&a->commit_loaded);
2770 		if (errcode) {
2771 			err = got_error_set_errno(errcode,
2772 			    "pthread_cond_signal");
2773 			pthread_mutex_unlock(&tog_mutex);
2774 			goto done;
2775 		}
2776 
2777 		if (done)
2778 			a->commits_needed = 0;
2779 		else {
2780 			if (a->commits_needed == 0 && !a->load_all) {
2781 				errcode = pthread_cond_wait(&a->need_commits,
2782 				    &tog_mutex);
2783 				if (errcode) {
2784 					err = got_error_set_errno(errcode,
2785 					    "pthread_cond_wait");
2786 					pthread_mutex_unlock(&tog_mutex);
2787 					goto done;
2788 				}
2789 				if (*a->quit)
2790 					done = 1;
2791 			}
2792 		}
2793 	}
2794 	a->log_complete = 1;
2795 	errcode = pthread_mutex_unlock(&tog_mutex);
2796 	if (errcode)
2797 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
2798 done:
2799 	if (err) {
2800 		tog_thread_error = 1;
2801 		pthread_cond_signal(&a->commit_loaded);
2802 	}
2803 	return (void *)err;
2804 }
2805 
2806 static const struct got_error *
2807 stop_log_thread(struct tog_log_view_state *s)
2808 {
2809 	const struct got_error *err = NULL, *thread_err = NULL;
2810 	int errcode;
2811 
2812 	if (s->thread) {
2813 		s->quit = 1;
2814 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2815 		if (errcode)
2816 			return got_error_set_errno(errcode,
2817 			    "pthread_cond_signal");
2818 		errcode = pthread_mutex_unlock(&tog_mutex);
2819 		if (errcode)
2820 			return got_error_set_errno(errcode,
2821 			    "pthread_mutex_unlock");
2822 		errcode = pthread_join(s->thread, (void **)&thread_err);
2823 		if (errcode)
2824 			return got_error_set_errno(errcode, "pthread_join");
2825 		errcode = pthread_mutex_lock(&tog_mutex);
2826 		if (errcode)
2827 			return got_error_set_errno(errcode,
2828 			    "pthread_mutex_lock");
2829 		s->thread = NULL;
2830 	}
2831 
2832 	if (s->thread_args.repo) {
2833 		err = got_repo_close(s->thread_args.repo);
2834 		s->thread_args.repo = NULL;
2835 	}
2836 
2837 	if (s->thread_args.pack_fds) {
2838 		const struct got_error *pack_err =
2839 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2840 		if (err == NULL)
2841 			err = pack_err;
2842 		s->thread_args.pack_fds = NULL;
2843 	}
2844 
2845 	if (s->thread_args.graph) {
2846 		got_commit_graph_close(s->thread_args.graph);
2847 		s->thread_args.graph = NULL;
2848 	}
2849 
2850 	return err ? err : thread_err;
2851 }
2852 
2853 static const struct got_error *
2854 close_log_view(struct tog_view *view)
2855 {
2856 	const struct got_error *err = NULL;
2857 	struct tog_log_view_state *s = &view->state.log;
2858 	int errcode;
2859 
2860 	err = stop_log_thread(s);
2861 
2862 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2863 	if (errcode && err == NULL)
2864 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2865 
2866 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2867 	if (errcode && err == NULL)
2868 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2869 
2870 	free_commits(&s->commits);
2871 	free(s->in_repo_path);
2872 	s->in_repo_path = NULL;
2873 	free(s->start_id);
2874 	s->start_id = NULL;
2875 	free(s->head_ref_name);
2876 	s->head_ref_name = NULL;
2877 	return err;
2878 }
2879 
2880 static const struct got_error *
2881 search_start_log_view(struct tog_view *view)
2882 {
2883 	struct tog_log_view_state *s = &view->state.log;
2884 
2885 	s->matched_entry = NULL;
2886 	s->search_entry = NULL;
2887 	return NULL;
2888 }
2889 
2890 static const struct got_error *
2891 search_next_log_view(struct tog_view *view)
2892 {
2893 	const struct got_error *err = NULL;
2894 	struct tog_log_view_state *s = &view->state.log;
2895 	struct commit_queue_entry *entry;
2896 
2897 	/* Display progress update in log view. */
2898 	show_log_view(view);
2899 	update_panels();
2900 	doupdate();
2901 
2902 	if (s->search_entry) {
2903 		int errcode, ch;
2904 		errcode = pthread_mutex_unlock(&tog_mutex);
2905 		if (errcode)
2906 			return got_error_set_errno(errcode,
2907 			    "pthread_mutex_unlock");
2908 		ch = wgetch(view->window);
2909 		errcode = pthread_mutex_lock(&tog_mutex);
2910 		if (errcode)
2911 			return got_error_set_errno(errcode,
2912 			    "pthread_mutex_lock");
2913 		if (ch == CTRL('g') || ch == KEY_BACKSPACE) {
2914 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2915 			return NULL;
2916 		}
2917 		if (view->searching == TOG_SEARCH_FORWARD)
2918 			entry = TAILQ_NEXT(s->search_entry, entry);
2919 		else
2920 			entry = TAILQ_PREV(s->search_entry,
2921 			    commit_queue_head, entry);
2922 	} else if (s->matched_entry) {
2923 		int matched_idx = s->matched_entry->idx;
2924 		int selected_idx = s->selected_entry->idx;
2925 
2926 		/*
2927 		 * If the user has moved the cursor after we hit a match,
2928 		 * the position from where we should continue searching
2929 		 * might have changed.
2930 		 */
2931 		if (view->searching == TOG_SEARCH_FORWARD) {
2932 			if (matched_idx > selected_idx)
2933 				entry = TAILQ_NEXT(s->selected_entry, entry);
2934 			else
2935 				entry = TAILQ_NEXT(s->matched_entry, entry);
2936 		} else {
2937 			if (matched_idx < selected_idx)
2938 				entry = TAILQ_PREV(s->selected_entry,
2939 						commit_queue_head, entry);
2940 			else
2941 				entry = TAILQ_PREV(s->matched_entry,
2942 						commit_queue_head, entry);
2943 		}
2944 	} else {
2945 		entry = s->selected_entry;
2946 	}
2947 
2948 	while (1) {
2949 		int have_match = 0;
2950 
2951 		if (entry == NULL) {
2952 			if (s->thread_args.log_complete ||
2953 			    view->searching == TOG_SEARCH_BACKWARD) {
2954 				view->search_next_done =
2955 				    (s->matched_entry == NULL ?
2956 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2957 				s->search_entry = NULL;
2958 				return NULL;
2959 			}
2960 			/*
2961 			 * Poke the log thread for more commits and return,
2962 			 * allowing the main loop to make progress. Search
2963 			 * will resume at s->search_entry once we come back.
2964 			 */
2965 			s->thread_args.commits_needed++;
2966 			return trigger_log_thread(view, 0);
2967 		}
2968 
2969 		err = match_commit(&have_match, entry->id, entry->commit,
2970 		    &view->regex);
2971 		if (err)
2972 			break;
2973 		if (have_match) {
2974 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2975 			s->matched_entry = entry;
2976 			break;
2977 		}
2978 
2979 		s->search_entry = entry;
2980 		if (view->searching == TOG_SEARCH_FORWARD)
2981 			entry = TAILQ_NEXT(entry, entry);
2982 		else
2983 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2984 	}
2985 
2986 	if (s->matched_entry) {
2987 		int cur = s->selected_entry->idx;
2988 		while (cur < s->matched_entry->idx) {
2989 			err = input_log_view(NULL, view, KEY_DOWN);
2990 			if (err)
2991 				return err;
2992 			cur++;
2993 		}
2994 		while (cur > s->matched_entry->idx) {
2995 			err = input_log_view(NULL, view, KEY_UP);
2996 			if (err)
2997 				return err;
2998 			cur--;
2999 		}
3000 	}
3001 
3002 	s->search_entry = NULL;
3003 
3004 	return NULL;
3005 }
3006 
3007 static const struct got_error *
3008 open_log_view(struct tog_view *view, struct got_object_id *start_id,
3009     struct got_repository *repo, const char *head_ref_name,
3010     const char *in_repo_path, int log_branches)
3011 {
3012 	const struct got_error *err = NULL;
3013 	struct tog_log_view_state *s = &view->state.log;
3014 	struct got_repository *thread_repo = NULL;
3015 	struct got_commit_graph *thread_graph = NULL;
3016 	int errcode;
3017 
3018 	if (in_repo_path != s->in_repo_path) {
3019 		free(s->in_repo_path);
3020 		s->in_repo_path = strdup(in_repo_path);
3021 		if (s->in_repo_path == NULL)
3022 			return got_error_from_errno("strdup");
3023 	}
3024 
3025 	/* The commit queue only contains commits being displayed. */
3026 	TAILQ_INIT(&s->commits.head);
3027 	s->commits.ncommits = 0;
3028 
3029 	s->repo = repo;
3030 	if (head_ref_name) {
3031 		s->head_ref_name = strdup(head_ref_name);
3032 		if (s->head_ref_name == NULL) {
3033 			err = got_error_from_errno("strdup");
3034 			goto done;
3035 		}
3036 	}
3037 	s->start_id = got_object_id_dup(start_id);
3038 	if (s->start_id == NULL) {
3039 		err = got_error_from_errno("got_object_id_dup");
3040 		goto done;
3041 	}
3042 	s->log_branches = log_branches;
3043 
3044 	STAILQ_INIT(&s->colors);
3045 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3046 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
3047 		    get_color_value("TOG_COLOR_COMMIT"));
3048 		if (err)
3049 			goto done;
3050 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
3051 		    get_color_value("TOG_COLOR_AUTHOR"));
3052 		if (err) {
3053 			free_colors(&s->colors);
3054 			goto done;
3055 		}
3056 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
3057 		    get_color_value("TOG_COLOR_DATE"));
3058 		if (err) {
3059 			free_colors(&s->colors);
3060 			goto done;
3061 		}
3062 	}
3063 
3064 	view->show = show_log_view;
3065 	view->input = input_log_view;
3066 	view->resize = resize_log_view;
3067 	view->close = close_log_view;
3068 	view->search_start = search_start_log_view;
3069 	view->search_next = search_next_log_view;
3070 
3071 	if (s->thread_args.pack_fds == NULL) {
3072 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3073 		if (err)
3074 			goto done;
3075 	}
3076 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
3077 	    s->thread_args.pack_fds);
3078 	if (err)
3079 		goto done;
3080 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
3081 	    !s->log_branches);
3082 	if (err)
3083 		goto done;
3084 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
3085 	    s->repo, NULL, NULL);
3086 	if (err)
3087 		goto done;
3088 
3089 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
3090 	if (errcode) {
3091 		err = got_error_set_errno(errcode, "pthread_cond_init");
3092 		goto done;
3093 	}
3094 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
3095 	if (errcode) {
3096 		err = got_error_set_errno(errcode, "pthread_cond_init");
3097 		goto done;
3098 	}
3099 
3100 	s->thread_args.commits_needed = view->nlines;
3101 	s->thread_args.graph = thread_graph;
3102 	s->thread_args.commits = &s->commits;
3103 	s->thread_args.in_repo_path = s->in_repo_path;
3104 	s->thread_args.start_id = s->start_id;
3105 	s->thread_args.repo = thread_repo;
3106 	s->thread_args.log_complete = 0;
3107 	s->thread_args.quit = &s->quit;
3108 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
3109 	s->thread_args.selected_entry = &s->selected_entry;
3110 	s->thread_args.searching = &view->searching;
3111 	s->thread_args.search_next_done = &view->search_next_done;
3112 	s->thread_args.regex = &view->regex;
3113 done:
3114 	if (err)
3115 		close_log_view(view);
3116 	return err;
3117 }
3118 
3119 static const struct got_error *
3120 show_log_view(struct tog_view *view)
3121 {
3122 	const struct got_error *err;
3123 	struct tog_log_view_state *s = &view->state.log;
3124 
3125 	if (s->thread == NULL) {
3126 		int errcode = pthread_create(&s->thread, NULL, log_thread,
3127 		    &s->thread_args);
3128 		if (errcode)
3129 			return got_error_set_errno(errcode, "pthread_create");
3130 		if (s->thread_args.commits_needed > 0) {
3131 			err = trigger_log_thread(view, 1);
3132 			if (err)
3133 				return err;
3134 		}
3135 	}
3136 
3137 	return draw_commits(view);
3138 }
3139 
3140 static void
3141 log_move_cursor_up(struct tog_view *view, int page, int home)
3142 {
3143 	struct tog_log_view_state *s = &view->state.log;
3144 
3145 	if (s->selected_entry->idx == 0)
3146 		view->count = 0;
3147 	if (s->first_displayed_entry == NULL)
3148 		return;
3149 
3150 	if ((page && TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
3151 	    || home)
3152 		s->selected = home ? 0 : MAX(0, s->selected - page - 1);
3153 
3154 	if (!page && !home && s->selected > 0)
3155 		--s->selected;
3156 	else
3157 		log_scroll_up(s, home ? s->commits.ncommits : MAX(page, 1));
3158 
3159 	select_commit(s);
3160 	return;
3161 }
3162 
3163 static const struct got_error *
3164 log_move_cursor_down(struct tog_view *view, int page)
3165 {
3166 	struct tog_log_view_state	*s = &view->state.log;
3167 	const struct got_error		*err = NULL;
3168 	int				 eos = view->nlines - 2;
3169 
3170 	if (s->thread_args.log_complete &&
3171 	    s->selected_entry->idx >= s->commits.ncommits - 1)
3172 		return NULL;
3173 
3174 	if (view_is_hsplit_top(view))
3175 		--eos;  /* border consumes the last line */
3176 
3177 	if (!page) {
3178 		if (s->selected < MIN(eos, s->commits.ncommits - 1))
3179 			++s->selected;
3180 		else
3181 			err = log_scroll_down(view, 1);
3182 	} else if (s->thread_args.load_all && s->thread_args.log_complete) {
3183 		struct commit_queue_entry *entry;
3184 		int n;
3185 
3186 		s->selected = 0;
3187 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
3188 		s->last_displayed_entry = entry;
3189 		for (n = 0; n <= eos; n++) {
3190 			if (entry == NULL)
3191 				break;
3192 			s->first_displayed_entry = entry;
3193 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3194 		}
3195 		if (n > 0)
3196 			s->selected = n - 1;
3197 	} else {
3198 		if (s->last_displayed_entry->idx == s->commits.ncommits - 1 &&
3199 		    s->thread_args.log_complete)
3200 			s->selected += MIN(page,
3201 			    s->commits.ncommits - s->selected_entry->idx - 1);
3202 		else
3203 			err = log_scroll_down(view, page);
3204 	}
3205 	if (err)
3206 		return err;
3207 
3208 	/*
3209 	 * We might necessarily overshoot in horizontal
3210 	 * splits; if so, select the last displayed commit.
3211 	 */
3212 	s->selected = MIN(s->selected,
3213 	    s->last_displayed_entry->idx - s->first_displayed_entry->idx);
3214 
3215 	select_commit(s);
3216 
3217 	if (s->thread_args.log_complete &&
3218 	    s->selected_entry->idx == s->commits.ncommits - 1)
3219 		view->count = 0;
3220 
3221 	return NULL;
3222 }
3223 
3224 static void
3225 view_get_split(struct tog_view *view, int *y, int *x)
3226 {
3227 	*x = 0;
3228 	*y = 0;
3229 
3230 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
3231 		if (view->child && view->child->resized_y)
3232 			*y = view->child->resized_y;
3233 		else if (view->resized_y)
3234 			*y = view->resized_y;
3235 		else
3236 			*y = view_split_begin_y(view->lines);
3237 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
3238 		if (view->child && view->child->resized_x)
3239 			*x = view->child->resized_x;
3240 		else if (view->resized_x)
3241 			*x = view->resized_x;
3242 		else
3243 			*x = view_split_begin_x(view->begin_x);
3244 	}
3245 }
3246 
3247 /* Split view horizontally at y and offset view->state->selected line. */
3248 static const struct got_error *
3249 view_init_hsplit(struct tog_view *view, int y)
3250 {
3251 	const struct got_error *err = NULL;
3252 
3253 	view->nlines = y;
3254 	view->ncols = COLS;
3255 	err = view_resize(view);
3256 	if (err)
3257 		return err;
3258 
3259 	err = offset_selection_down(view);
3260 
3261 	return err;
3262 }
3263 
3264 static const struct got_error *
3265 log_goto_line(struct tog_view *view, int nlines)
3266 {
3267 	const struct got_error		*err = NULL;
3268 	struct tog_log_view_state	*s = &view->state.log;
3269 	int				 g, idx = s->selected_entry->idx;
3270 
3271 	g = view->gline;
3272 	view->gline = 0;
3273 
3274 	if (g >= s->first_displayed_entry->idx + 1 &&
3275 	    g <= s->last_displayed_entry->idx + 1 &&
3276 	    g - s->first_displayed_entry->idx - 1 < nlines) {
3277 		s->selected = g - s->first_displayed_entry->idx - 1;
3278 		select_commit(s);
3279 		return NULL;
3280 	}
3281 
3282 	if (idx + 1 < g) {
3283 		err = log_move_cursor_down(view, g - idx - 1);
3284 		if (!err && g > s->selected_entry->idx + 1)
3285 			err = log_move_cursor_down(view,
3286 			    g - s->first_displayed_entry->idx - 1);
3287 		if (err)
3288 			return err;
3289 	} else if (idx + 1 > g)
3290 		log_move_cursor_up(view, idx - g + 1, 0);
3291 
3292 	if (g < nlines && s->first_displayed_entry->idx == 0)
3293 		s->selected = g - 1;
3294 
3295 	select_commit(s);
3296 	return NULL;
3297 
3298 }
3299 
3300 static const struct got_error *
3301 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
3302 {
3303 	const struct got_error *err = NULL;
3304 	struct tog_log_view_state *s = &view->state.log;
3305 	int eos, nscroll;
3306 
3307 	if (s->thread_args.load_all) {
3308 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
3309 			s->thread_args.load_all = 0;
3310 		else if (s->thread_args.log_complete) {
3311 			err = log_move_cursor_down(view, s->commits.ncommits);
3312 			s->thread_args.load_all = 0;
3313 		}
3314 		if (err)
3315 			return err;
3316 	}
3317 
3318 	eos = nscroll = view->nlines - 1;
3319 	if (view_is_hsplit_top(view))
3320 		--eos;  /* border */
3321 
3322 	if (view->gline)
3323 		return log_goto_line(view, eos);
3324 
3325 	switch (ch) {
3326 	case 'q':
3327 		s->quit = 1;
3328 		break;
3329 	case '0':
3330 		view->x = 0;
3331 		break;
3332 	case '$':
3333 		view->x = MAX(view->maxx - view->ncols / 2, 0);
3334 		view->count = 0;
3335 		break;
3336 	case KEY_RIGHT:
3337 	case 'l':
3338 		if (view->x + view->ncols / 2 < view->maxx)
3339 			view->x += 2;  /* move two columns right */
3340 		else
3341 			view->count = 0;
3342 		break;
3343 	case KEY_LEFT:
3344 	case 'h':
3345 		view->x -= MIN(view->x, 2);  /* move two columns back */
3346 		if (view->x <= 0)
3347 			view->count = 0;
3348 		break;
3349 	case 'k':
3350 	case KEY_UP:
3351 	case '<':
3352 	case ',':
3353 	case CTRL('p'):
3354 		log_move_cursor_up(view, 0, 0);
3355 		break;
3356 	case 'g':
3357 	case KEY_HOME:
3358 		log_move_cursor_up(view, 0, 1);
3359 		view->count = 0;
3360 		break;
3361 	case CTRL('u'):
3362 	case 'u':
3363 		nscroll /= 2;
3364 		/* FALL THROUGH */
3365 	case KEY_PPAGE:
3366 	case CTRL('b'):
3367 	case 'b':
3368 		log_move_cursor_up(view, nscroll, 0);
3369 		break;
3370 	case 'j':
3371 	case KEY_DOWN:
3372 	case '>':
3373 	case '.':
3374 	case CTRL('n'):
3375 		err = log_move_cursor_down(view, 0);
3376 		break;
3377 	case '@':
3378 		s->use_committer = !s->use_committer;
3379 		break;
3380 	case 'G':
3381 	case KEY_END: {
3382 		/* We don't know yet how many commits, so we're forced to
3383 		 * traverse them all. */
3384 		view->count = 0;
3385 		s->thread_args.load_all = 1;
3386 		if (!s->thread_args.log_complete)
3387 			return trigger_log_thread(view, 0);
3388 		err = log_move_cursor_down(view, s->commits.ncommits);
3389 		s->thread_args.load_all = 0;
3390 		break;
3391 	}
3392 	case CTRL('d'):
3393 	case 'd':
3394 		nscroll /= 2;
3395 		/* FALL THROUGH */
3396 	case KEY_NPAGE:
3397 	case CTRL('f'):
3398 	case 'f':
3399 	case ' ':
3400 		err = log_move_cursor_down(view, nscroll);
3401 		break;
3402 	case KEY_RESIZE:
3403 		if (s->selected > view->nlines - 2)
3404 			s->selected = view->nlines - 2;
3405 		if (s->selected > s->commits.ncommits - 1)
3406 			s->selected = s->commits.ncommits - 1;
3407 		select_commit(s);
3408 		if (s->commits.ncommits < view->nlines - 1 &&
3409 		    !s->thread_args.log_complete) {
3410 			s->thread_args.commits_needed += (view->nlines - 1) -
3411 			    s->commits.ncommits;
3412 			err = trigger_log_thread(view, 1);
3413 		}
3414 		break;
3415 	case KEY_ENTER:
3416 	case '\r':
3417 		view->count = 0;
3418 		if (s->selected_entry == NULL)
3419 			break;
3420 		err = view_request_new(new_view, view, TOG_VIEW_DIFF);
3421 		break;
3422 	case 'T':
3423 		view->count = 0;
3424 		if (s->selected_entry == NULL)
3425 			break;
3426 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
3427 		break;
3428 	case KEY_BACKSPACE:
3429 	case CTRL('l'):
3430 	case 'B':
3431 		view->count = 0;
3432 		if (ch == KEY_BACKSPACE &&
3433 		    got_path_is_root_dir(s->in_repo_path))
3434 			break;
3435 		err = stop_log_thread(s);
3436 		if (err)
3437 			return err;
3438 		if (ch == KEY_BACKSPACE) {
3439 			char *parent_path;
3440 			err = got_path_dirname(&parent_path, s->in_repo_path);
3441 			if (err)
3442 				return err;
3443 			free(s->in_repo_path);
3444 			s->in_repo_path = parent_path;
3445 			s->thread_args.in_repo_path = s->in_repo_path;
3446 		} else if (ch == CTRL('l')) {
3447 			struct got_object_id *start_id;
3448 			err = got_repo_match_object_id(&start_id, NULL,
3449 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
3450 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
3451 			if (err)
3452 				return err;
3453 			free(s->start_id);
3454 			s->start_id = start_id;
3455 			s->thread_args.start_id = s->start_id;
3456 		} else /* 'B' */
3457 			s->log_branches = !s->log_branches;
3458 
3459 		if (s->thread_args.pack_fds == NULL) {
3460 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3461 			if (err)
3462 				return err;
3463 		}
3464 		err = got_repo_open(&s->thread_args.repo,
3465 		    got_repo_get_path(s->repo), NULL,
3466 		    s->thread_args.pack_fds);
3467 		if (err)
3468 			return err;
3469 		tog_free_refs();
3470 		err = tog_load_refs(s->repo, 0);
3471 		if (err)
3472 			return err;
3473 		err = got_commit_graph_open(&s->thread_args.graph,
3474 		    s->in_repo_path, !s->log_branches);
3475 		if (err)
3476 			return err;
3477 		err = got_commit_graph_iter_start(s->thread_args.graph,
3478 		    s->start_id, s->repo, NULL, NULL);
3479 		if (err)
3480 			return err;
3481 		free_commits(&s->commits);
3482 		s->first_displayed_entry = NULL;
3483 		s->last_displayed_entry = NULL;
3484 		s->selected_entry = NULL;
3485 		s->selected = 0;
3486 		s->thread_args.log_complete = 0;
3487 		s->quit = 0;
3488 		s->thread_args.commits_needed = view->lines;
3489 		s->matched_entry = NULL;
3490 		s->search_entry = NULL;
3491 		view->offset = 0;
3492 		break;
3493 	case 'R':
3494 		view->count = 0;
3495 		err = view_request_new(new_view, view, TOG_VIEW_REF);
3496 		break;
3497 	default:
3498 		view->count = 0;
3499 		break;
3500 	}
3501 
3502 	return err;
3503 }
3504 
3505 static const struct got_error *
3506 apply_unveil(const char *repo_path, const char *worktree_path)
3507 {
3508 	const struct got_error *error;
3509 
3510 #ifdef PROFILE
3511 	if (unveil("gmon.out", "rwc") != 0)
3512 		return got_error_from_errno2("unveil", "gmon.out");
3513 #endif
3514 	if (repo_path && unveil(repo_path, "r") != 0)
3515 		return got_error_from_errno2("unveil", repo_path);
3516 
3517 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
3518 		return got_error_from_errno2("unveil", worktree_path);
3519 
3520 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
3521 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
3522 
3523 	error = got_privsep_unveil_exec_helpers();
3524 	if (error != NULL)
3525 		return error;
3526 
3527 	if (unveil(NULL, NULL) != 0)
3528 		return got_error_from_errno("unveil");
3529 
3530 	return NULL;
3531 }
3532 
3533 static void
3534 init_curses(void)
3535 {
3536 	/*
3537 	 * Override default signal handlers before starting ncurses.
3538 	 * This should prevent ncurses from installing its own
3539 	 * broken cleanup() signal handler.
3540 	 */
3541 	signal(SIGWINCH, tog_sigwinch);
3542 	signal(SIGPIPE, tog_sigpipe);
3543 	signal(SIGCONT, tog_sigcont);
3544 	signal(SIGINT, tog_sigint);
3545 	signal(SIGTERM, tog_sigterm);
3546 
3547 	initscr();
3548 	cbreak();
3549 	halfdelay(1); /* Do fast refresh while initial view is loading. */
3550 	noecho();
3551 	nonl();
3552 	intrflush(stdscr, FALSE);
3553 	keypad(stdscr, TRUE);
3554 	curs_set(0);
3555 	if (getenv("TOG_COLORS") != NULL) {
3556 		start_color();
3557 		use_default_colors();
3558 	}
3559 }
3560 
3561 static const struct got_error *
3562 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
3563     struct got_repository *repo, struct got_worktree *worktree)
3564 {
3565 	const struct got_error *err = NULL;
3566 
3567 	if (argc == 0) {
3568 		*in_repo_path = strdup("/");
3569 		if (*in_repo_path == NULL)
3570 			return got_error_from_errno("strdup");
3571 		return NULL;
3572 	}
3573 
3574 	if (worktree) {
3575 		const char *prefix = got_worktree_get_path_prefix(worktree);
3576 		char *p;
3577 
3578 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3579 		if (err)
3580 			return err;
3581 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3582 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3583 		    p) == -1) {
3584 			err = got_error_from_errno("asprintf");
3585 			*in_repo_path = NULL;
3586 		}
3587 		free(p);
3588 	} else
3589 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3590 
3591 	return err;
3592 }
3593 
3594 static const struct got_error *
3595 cmd_log(int argc, char *argv[])
3596 {
3597 	const struct got_error *error;
3598 	struct got_repository *repo = NULL;
3599 	struct got_worktree *worktree = NULL;
3600 	struct got_object_id *start_id = NULL;
3601 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3602 	char *start_commit = NULL, *label = NULL;
3603 	struct got_reference *ref = NULL;
3604 	const char *head_ref_name = NULL;
3605 	int ch, log_branches = 0;
3606 	struct tog_view *view;
3607 	int *pack_fds = NULL;
3608 
3609 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3610 		switch (ch) {
3611 		case 'b':
3612 			log_branches = 1;
3613 			break;
3614 		case 'c':
3615 			start_commit = optarg;
3616 			break;
3617 		case 'r':
3618 			repo_path = realpath(optarg, NULL);
3619 			if (repo_path == NULL)
3620 				return got_error_from_errno2("realpath",
3621 				    optarg);
3622 			break;
3623 		default:
3624 			usage_log();
3625 			/* NOTREACHED */
3626 		}
3627 	}
3628 
3629 	argc -= optind;
3630 	argv += optind;
3631 
3632 	if (argc > 1)
3633 		usage_log();
3634 
3635 	error = got_repo_pack_fds_open(&pack_fds);
3636 	if (error != NULL)
3637 		goto done;
3638 
3639 	if (repo_path == NULL) {
3640 		cwd = getcwd(NULL, 0);
3641 		if (cwd == NULL)
3642 			return got_error_from_errno("getcwd");
3643 		error = got_worktree_open(&worktree, cwd);
3644 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3645 			goto done;
3646 		if (worktree)
3647 			repo_path =
3648 			    strdup(got_worktree_get_repo_path(worktree));
3649 		else
3650 			repo_path = strdup(cwd);
3651 		if (repo_path == NULL) {
3652 			error = got_error_from_errno("strdup");
3653 			goto done;
3654 		}
3655 	}
3656 
3657 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3658 	if (error != NULL)
3659 		goto done;
3660 
3661 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3662 	    repo, worktree);
3663 	if (error)
3664 		goto done;
3665 
3666 	init_curses();
3667 
3668 	error = apply_unveil(got_repo_get_path(repo),
3669 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3670 	if (error)
3671 		goto done;
3672 
3673 	/* already loaded by tog_log_with_path()? */
3674 	if (TAILQ_EMPTY(&tog_refs)) {
3675 		error = tog_load_refs(repo, 0);
3676 		if (error)
3677 			goto done;
3678 	}
3679 
3680 	if (start_commit == NULL) {
3681 		error = got_repo_match_object_id(&start_id, &label,
3682 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3683 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3684 		if (error)
3685 			goto done;
3686 		head_ref_name = label;
3687 	} else {
3688 		error = got_ref_open(&ref, repo, start_commit, 0);
3689 		if (error == NULL)
3690 			head_ref_name = got_ref_get_name(ref);
3691 		else if (error->code != GOT_ERR_NOT_REF)
3692 			goto done;
3693 		error = got_repo_match_object_id(&start_id, NULL,
3694 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3695 		if (error)
3696 			goto done;
3697 	}
3698 
3699 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3700 	if (view == NULL) {
3701 		error = got_error_from_errno("view_open");
3702 		goto done;
3703 	}
3704 	error = open_log_view(view, start_id, repo, head_ref_name,
3705 	    in_repo_path, log_branches);
3706 	if (error)
3707 		goto done;
3708 	if (worktree) {
3709 		/* Release work tree lock. */
3710 		got_worktree_close(worktree);
3711 		worktree = NULL;
3712 	}
3713 	error = view_loop(view);
3714 done:
3715 	free(in_repo_path);
3716 	free(repo_path);
3717 	free(cwd);
3718 	free(start_id);
3719 	free(label);
3720 	if (ref)
3721 		got_ref_close(ref);
3722 	if (repo) {
3723 		const struct got_error *close_err = got_repo_close(repo);
3724 		if (error == NULL)
3725 			error = close_err;
3726 	}
3727 	if (worktree)
3728 		got_worktree_close(worktree);
3729 	if (pack_fds) {
3730 		const struct got_error *pack_err =
3731 		    got_repo_pack_fds_close(pack_fds);
3732 		if (error == NULL)
3733 			error = pack_err;
3734 	}
3735 	tog_free_refs();
3736 	return error;
3737 }
3738 
3739 __dead static void
3740 usage_diff(void)
3741 {
3742 	endwin();
3743 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3744 	    "[-w] object1 object2\n", getprogname());
3745 	exit(1);
3746 }
3747 
3748 static int
3749 match_line(const char *line, regex_t *regex, size_t nmatch,
3750     regmatch_t *regmatch)
3751 {
3752 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3753 }
3754 
3755 static struct tog_color *
3756 match_color(struct tog_colors *colors, const char *line)
3757 {
3758 	struct tog_color *tc = NULL;
3759 
3760 	STAILQ_FOREACH(tc, colors, entry) {
3761 		if (match_line(line, &tc->regex, 0, NULL))
3762 			return tc;
3763 	}
3764 
3765 	return NULL;
3766 }
3767 
3768 static const struct got_error *
3769 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3770     WINDOW *window, int skipcol, regmatch_t *regmatch)
3771 {
3772 	const struct got_error *err = NULL;
3773 	char *exstr = NULL;
3774 	wchar_t *wline = NULL;
3775 	int rme, rms, n, width, scrollx;
3776 	int width0 = 0, width1 = 0, width2 = 0;
3777 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3778 
3779 	*wtotal = 0;
3780 
3781 	rms = regmatch->rm_so;
3782 	rme = regmatch->rm_eo;
3783 
3784 	err = expand_tab(&exstr, line);
3785 	if (err)
3786 		return err;
3787 
3788 	/* Split the line into 3 segments, according to match offsets. */
3789 	seg0 = strndup(exstr, rms);
3790 	if (seg0 == NULL) {
3791 		err = got_error_from_errno("strndup");
3792 		goto done;
3793 	}
3794 	seg1 = strndup(exstr + rms, rme - rms);
3795 	if (seg1 == NULL) {
3796 		err = got_error_from_errno("strndup");
3797 		goto done;
3798 	}
3799 	seg2 = strdup(exstr + rme);
3800 	if (seg2 == NULL) {
3801 		err = got_error_from_errno("strndup");
3802 		goto done;
3803 	}
3804 
3805 	/* draw up to matched token if we haven't scrolled past it */
3806 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3807 	    col_tab_align, 1);
3808 	if (err)
3809 		goto done;
3810 	n = MAX(width0 - skipcol, 0);
3811 	if (n) {
3812 		free(wline);
3813 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3814 		    wlimit, col_tab_align, 1);
3815 		if (err)
3816 			goto done;
3817 		waddwstr(window, &wline[scrollx]);
3818 		wlimit -= width;
3819 		*wtotal += width;
3820 	}
3821 
3822 	if (wlimit > 0) {
3823 		int i = 0, w = 0;
3824 		size_t wlen;
3825 
3826 		free(wline);
3827 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3828 		    col_tab_align, 1);
3829 		if (err)
3830 			goto done;
3831 		wlen = wcslen(wline);
3832 		while (i < wlen) {
3833 			width = wcwidth(wline[i]);
3834 			if (width == -1) {
3835 				/* should not happen, tabs are expanded */
3836 				err = got_error(GOT_ERR_RANGE);
3837 				goto done;
3838 			}
3839 			if (width0 + w + width > skipcol)
3840 				break;
3841 			w += width;
3842 			i++;
3843 		}
3844 		/* draw (visible part of) matched token (if scrolled into it) */
3845 		if (width1 - w > 0) {
3846 			wattron(window, A_STANDOUT);
3847 			waddwstr(window, &wline[i]);
3848 			wattroff(window, A_STANDOUT);
3849 			wlimit -= (width1 - w);
3850 			*wtotal += (width1 - w);
3851 		}
3852 	}
3853 
3854 	if (wlimit > 0) {  /* draw rest of line */
3855 		free(wline);
3856 		if (skipcol > width0 + width1) {
3857 			err = format_line(&wline, &width2, &scrollx, seg2,
3858 			    skipcol - (width0 + width1), wlimit,
3859 			    col_tab_align, 1);
3860 			if (err)
3861 				goto done;
3862 			waddwstr(window, &wline[scrollx]);
3863 		} else {
3864 			err = format_line(&wline, &width2, NULL, seg2, 0,
3865 			    wlimit, col_tab_align, 1);
3866 			if (err)
3867 				goto done;
3868 			waddwstr(window, wline);
3869 		}
3870 		*wtotal += width2;
3871 	}
3872 done:
3873 	free(wline);
3874 	free(exstr);
3875 	free(seg0);
3876 	free(seg1);
3877 	free(seg2);
3878 	return err;
3879 }
3880 
3881 static int
3882 gotoline(struct tog_view *view, int *lineno, int *nprinted)
3883 {
3884 	FILE	*f = NULL;
3885 	int	*eof, *first, *selected;
3886 
3887 	if (view->type == TOG_VIEW_DIFF) {
3888 		struct tog_diff_view_state *s = &view->state.diff;
3889 
3890 		first = &s->first_displayed_line;
3891 		selected = first;
3892 		eof = &s->eof;
3893 		f = s->f;
3894 	} else if (view->type == TOG_VIEW_BLAME) {
3895 		struct tog_blame_view_state *s = &view->state.blame;
3896 
3897 		first = &s->first_displayed_line;
3898 		selected = &s->selected_line;
3899 		eof = &s->eof;
3900 		f = s->blame.f;
3901 	} else
3902 		return 0;
3903 
3904 	/* Center gline in the middle of the page like vi(1). */
3905 	if (*lineno < view->gline - (view->nlines - 3) / 2)
3906 		return 0;
3907 	if (*first != 1 && (*lineno > view->gline - (view->nlines - 3) / 2)) {
3908 		rewind(f);
3909 		*eof = 0;
3910 		*first = 1;
3911 		*lineno = 0;
3912 		*nprinted = 0;
3913 		return 0;
3914 	}
3915 
3916 	*selected = view->gline <= (view->nlines - 3) / 2 ?
3917 		view->gline : (view->nlines - 3) / 2 + 1;
3918 	view->gline = 0;
3919 
3920 	return 1;
3921 }
3922 
3923 static const struct got_error *
3924 draw_file(struct tog_view *view, const char *header)
3925 {
3926 	struct tog_diff_view_state *s = &view->state.diff;
3927 	regmatch_t *regmatch = &view->regmatch;
3928 	const struct got_error *err;
3929 	int nprinted = 0;
3930 	char *line;
3931 	size_t linesize = 0;
3932 	ssize_t linelen;
3933 	wchar_t *wline;
3934 	int width;
3935 	int max_lines = view->nlines;
3936 	int nlines = s->nlines;
3937 	off_t line_offset;
3938 
3939 	s->lineno = s->first_displayed_line - 1;
3940 	line_offset = s->lines[s->first_displayed_line - 1].offset;
3941 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3942 		return got_error_from_errno("fseek");
3943 
3944 	werase(view->window);
3945 
3946 	if (view->gline > s->nlines - 1)
3947 		view->gline = s->nlines - 1;
3948 
3949 	if (header) {
3950 		int ln = view->gline ? view->gline <= (view->nlines - 3) / 2 ?
3951 		    1 : view->gline - (view->nlines - 3) / 2 :
3952 		    s->lineno + s->selected_line;
3953 
3954 		if (asprintf(&line, "[%d/%d] %s", ln, nlines, header) == -1)
3955 			return got_error_from_errno("asprintf");
3956 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3957 		    0, 0);
3958 		free(line);
3959 		if (err)
3960 			return err;
3961 
3962 		if (view_needs_focus_indication(view))
3963 			wstandout(view->window);
3964 		waddwstr(view->window, wline);
3965 		free(wline);
3966 		wline = NULL;
3967 		if (view_needs_focus_indication(view))
3968 			wstandend(view->window);
3969 		if (width <= view->ncols - 1)
3970 			waddch(view->window, '\n');
3971 
3972 		if (max_lines <= 1)
3973 			return NULL;
3974 		max_lines--;
3975 	}
3976 
3977 	s->eof = 0;
3978 	view->maxx = 0;
3979 	line = NULL;
3980 	while (max_lines > 0 && nprinted < max_lines) {
3981 		enum got_diff_line_type linetype;
3982 		attr_t attr = 0;
3983 
3984 		linelen = getline(&line, &linesize, s->f);
3985 		if (linelen == -1) {
3986 			if (feof(s->f)) {
3987 				s->eof = 1;
3988 				break;
3989 			}
3990 			free(line);
3991 			return got_ferror(s->f, GOT_ERR_IO);
3992 		}
3993 
3994 		if (++s->lineno < s->first_displayed_line)
3995 			continue;
3996 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
3997 			continue;
3998 		if (s->lineno == view->hiline)
3999 			attr = A_STANDOUT;
4000 
4001 		/* Set view->maxx based on full line length. */
4002 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
4003 		    view->x ? 1 : 0);
4004 		if (err) {
4005 			free(line);
4006 			return err;
4007 		}
4008 		view->maxx = MAX(view->maxx, width);
4009 		free(wline);
4010 		wline = NULL;
4011 
4012 		linetype = s->lines[s->lineno].type;
4013 		if (linetype > GOT_DIFF_LINE_LOGMSG &&
4014 		    linetype < GOT_DIFF_LINE_CONTEXT)
4015 			attr |= COLOR_PAIR(linetype);
4016 		if (attr)
4017 			wattron(view->window, attr);
4018 		if (s->first_displayed_line + nprinted == s->matched_line &&
4019 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4020 			err = add_matched_line(&width, line, view->ncols, 0,
4021 			    view->window, view->x, regmatch);
4022 			if (err) {
4023 				free(line);
4024 				return err;
4025 			}
4026 		} else {
4027 			int skip;
4028 			err = format_line(&wline, &width, &skip, line,
4029 			    view->x, view->ncols, 0, view->x ? 1 : 0);
4030 			if (err) {
4031 				free(line);
4032 				return err;
4033 			}
4034 			waddwstr(view->window, &wline[skip]);
4035 			free(wline);
4036 			wline = NULL;
4037 		}
4038 		if (s->lineno == view->hiline) {
4039 			/* highlight full gline length */
4040 			while (width++ < view->ncols)
4041 				waddch(view->window, ' ');
4042 		} else {
4043 			if (width <= view->ncols - 1)
4044 				waddch(view->window, '\n');
4045 		}
4046 		if (attr)
4047 			wattroff(view->window, attr);
4048 		if (++nprinted == 1)
4049 			s->first_displayed_line = s->lineno;
4050 	}
4051 	free(line);
4052 	if (nprinted >= 1)
4053 		s->last_displayed_line = s->first_displayed_line +
4054 		    (nprinted - 1);
4055 	else
4056 		s->last_displayed_line = s->first_displayed_line;
4057 
4058 	view_border(view);
4059 
4060 	if (s->eof) {
4061 		while (nprinted < view->nlines) {
4062 			waddch(view->window, '\n');
4063 			nprinted++;
4064 		}
4065 
4066 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
4067 		    view->ncols, 0, 0);
4068 		if (err) {
4069 			return err;
4070 		}
4071 
4072 		wstandout(view->window);
4073 		waddwstr(view->window, wline);
4074 		free(wline);
4075 		wline = NULL;
4076 		wstandend(view->window);
4077 	}
4078 
4079 	return NULL;
4080 }
4081 
4082 static char *
4083 get_datestr(time_t *time, char *datebuf)
4084 {
4085 	struct tm mytm, *tm;
4086 	char *p, *s;
4087 
4088 	tm = gmtime_r(time, &mytm);
4089 	if (tm == NULL)
4090 		return NULL;
4091 	s = asctime_r(tm, datebuf);
4092 	if (s == NULL)
4093 		return NULL;
4094 	p = strchr(s, '\n');
4095 	if (p)
4096 		*p = '\0';
4097 	return s;
4098 }
4099 
4100 static const struct got_error *
4101 get_changed_paths(struct got_pathlist_head *paths,
4102     struct got_commit_object *commit, struct got_repository *repo)
4103 {
4104 	const struct got_error *err = NULL;
4105 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
4106 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
4107 	struct got_object_qid *qid;
4108 
4109 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
4110 	if (qid != NULL) {
4111 		struct got_commit_object *pcommit;
4112 		err = got_object_open_as_commit(&pcommit, repo,
4113 		    &qid->id);
4114 		if (err)
4115 			return err;
4116 
4117 		tree_id1 = got_object_id_dup(
4118 		    got_object_commit_get_tree_id(pcommit));
4119 		if (tree_id1 == NULL) {
4120 			got_object_commit_close(pcommit);
4121 			return got_error_from_errno("got_object_id_dup");
4122 		}
4123 		got_object_commit_close(pcommit);
4124 
4125 	}
4126 
4127 	if (tree_id1) {
4128 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
4129 		if (err)
4130 			goto done;
4131 	}
4132 
4133 	tree_id2 = got_object_commit_get_tree_id(commit);
4134 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
4135 	if (err)
4136 		goto done;
4137 
4138 	err = got_diff_tree(tree1, tree2, NULL, NULL, -1, -1, "", "", repo,
4139 	    got_diff_tree_collect_changed_paths, paths, 0);
4140 done:
4141 	if (tree1)
4142 		got_object_tree_close(tree1);
4143 	if (tree2)
4144 		got_object_tree_close(tree2);
4145 	free(tree_id1);
4146 	return err;
4147 }
4148 
4149 static const struct got_error *
4150 add_line_metadata(struct got_diff_line **lines, size_t *nlines,
4151     off_t off, uint8_t type)
4152 {
4153 	struct got_diff_line *p;
4154 
4155 	p = reallocarray(*lines, *nlines + 1, sizeof(**lines));
4156 	if (p == NULL)
4157 		return got_error_from_errno("reallocarray");
4158 	*lines = p;
4159 	(*lines)[*nlines].offset = off;
4160 	(*lines)[*nlines].type = type;
4161 	(*nlines)++;
4162 
4163 	return NULL;
4164 }
4165 
4166 static const struct got_error *
4167 write_commit_info(struct got_diff_line **lines, size_t *nlines,
4168     struct got_object_id *commit_id, struct got_reflist_head *refs,
4169     struct got_repository *repo, FILE *outfile)
4170 {
4171 	const struct got_error *err = NULL;
4172 	char datebuf[26], *datestr;
4173 	struct got_commit_object *commit;
4174 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
4175 	time_t committer_time;
4176 	const char *author, *committer;
4177 	char *refs_str = NULL;
4178 	struct got_pathlist_head changed_paths;
4179 	struct got_pathlist_entry *pe;
4180 	off_t outoff = 0;
4181 	int n;
4182 
4183 	TAILQ_INIT(&changed_paths);
4184 
4185 	if (refs) {
4186 		err = build_refs_str(&refs_str, refs, commit_id, repo);
4187 		if (err)
4188 			return err;
4189 	}
4190 
4191 	err = got_object_open_as_commit(&commit, repo, commit_id);
4192 	if (err)
4193 		return err;
4194 
4195 	err = got_object_id_str(&id_str, commit_id);
4196 	if (err) {
4197 		err = got_error_from_errno("got_object_id_str");
4198 		goto done;
4199 	}
4200 
4201 	err = add_line_metadata(lines, nlines, 0, GOT_DIFF_LINE_NONE);
4202 	if (err)
4203 		goto done;
4204 
4205 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
4206 	    refs_str ? refs_str : "", refs_str ? ")" : "");
4207 	if (n < 0) {
4208 		err = got_error_from_errno("fprintf");
4209 		goto done;
4210 	}
4211 	outoff += n;
4212 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_META);
4213 	if (err)
4214 		goto done;
4215 
4216 	n = fprintf(outfile, "from: %s\n",
4217 	    got_object_commit_get_author(commit));
4218 	if (n < 0) {
4219 		err = got_error_from_errno("fprintf");
4220 		goto done;
4221 	}
4222 	outoff += n;
4223 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_AUTHOR);
4224 	if (err)
4225 		goto done;
4226 
4227 	committer_time = got_object_commit_get_committer_time(commit);
4228 	datestr = get_datestr(&committer_time, datebuf);
4229 	if (datestr) {
4230 		n = fprintf(outfile, "date: %s UTC\n", datestr);
4231 		if (n < 0) {
4232 			err = got_error_from_errno("fprintf");
4233 			goto done;
4234 		}
4235 		outoff += n;
4236 		err = add_line_metadata(lines, nlines, outoff,
4237 		    GOT_DIFF_LINE_DATE);
4238 		if (err)
4239 			goto done;
4240 	}
4241 	author = got_object_commit_get_author(commit);
4242 	committer = got_object_commit_get_committer(commit);
4243 	if (strcmp(author, committer) != 0) {
4244 		n = fprintf(outfile, "via: %s\n", committer);
4245 		if (n < 0) {
4246 			err = got_error_from_errno("fprintf");
4247 			goto done;
4248 		}
4249 		outoff += n;
4250 		err = add_line_metadata(lines, nlines, outoff,
4251 		    GOT_DIFF_LINE_AUTHOR);
4252 		if (err)
4253 			goto done;
4254 	}
4255 	if (got_object_commit_get_nparents(commit) > 1) {
4256 		const struct got_object_id_queue *parent_ids;
4257 		struct got_object_qid *qid;
4258 		int pn = 1;
4259 		parent_ids = got_object_commit_get_parent_ids(commit);
4260 		STAILQ_FOREACH(qid, parent_ids, entry) {
4261 			err = got_object_id_str(&id_str, &qid->id);
4262 			if (err)
4263 				goto done;
4264 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
4265 			if (n < 0) {
4266 				err = got_error_from_errno("fprintf");
4267 				goto done;
4268 			}
4269 			outoff += n;
4270 			err = add_line_metadata(lines, nlines, outoff,
4271 			    GOT_DIFF_LINE_META);
4272 			if (err)
4273 				goto done;
4274 			free(id_str);
4275 			id_str = NULL;
4276 		}
4277 	}
4278 
4279 	err = got_object_commit_get_logmsg(&logmsg, commit);
4280 	if (err)
4281 		goto done;
4282 	s = logmsg;
4283 	while ((line = strsep(&s, "\n")) != NULL) {
4284 		n = fprintf(outfile, "%s\n", line);
4285 		if (n < 0) {
4286 			err = got_error_from_errno("fprintf");
4287 			goto done;
4288 		}
4289 		outoff += n;
4290 		err = add_line_metadata(lines, nlines, outoff,
4291 		    GOT_DIFF_LINE_LOGMSG);
4292 		if (err)
4293 			goto done;
4294 	}
4295 
4296 	err = get_changed_paths(&changed_paths, commit, repo);
4297 	if (err)
4298 		goto done;
4299 	TAILQ_FOREACH(pe, &changed_paths, entry) {
4300 		struct got_diff_changed_path *cp = pe->data;
4301 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
4302 		if (n < 0) {
4303 			err = got_error_from_errno("fprintf");
4304 			goto done;
4305 		}
4306 		outoff += n;
4307 		err = add_line_metadata(lines, nlines, outoff,
4308 		    GOT_DIFF_LINE_CHANGES);
4309 		if (err)
4310 			goto done;
4311 		free((char *)pe->path);
4312 		free(pe->data);
4313 	}
4314 
4315 	fputc('\n', outfile);
4316 	outoff++;
4317 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
4318 done:
4319 	got_pathlist_free(&changed_paths);
4320 	free(id_str);
4321 	free(logmsg);
4322 	free(refs_str);
4323 	got_object_commit_close(commit);
4324 	if (err) {
4325 		free(*lines);
4326 		*lines = NULL;
4327 		*nlines = 0;
4328 	}
4329 	return err;
4330 }
4331 
4332 static const struct got_error *
4333 create_diff(struct tog_diff_view_state *s)
4334 {
4335 	const struct got_error *err = NULL;
4336 	FILE *f = NULL;
4337 	int obj_type;
4338 
4339 	free(s->lines);
4340 	s->lines = malloc(sizeof(*s->lines));
4341 	if (s->lines == NULL)
4342 		return got_error_from_errno("malloc");
4343 	s->nlines = 0;
4344 
4345 	f = got_opentemp();
4346 	if (f == NULL) {
4347 		err = got_error_from_errno("got_opentemp");
4348 		goto done;
4349 	}
4350 	if (s->f && fclose(s->f) == EOF) {
4351 		err = got_error_from_errno("fclose");
4352 		goto done;
4353 	}
4354 	s->f = f;
4355 
4356 	if (s->id1)
4357 		err = got_object_get_type(&obj_type, s->repo, s->id1);
4358 	else
4359 		err = got_object_get_type(&obj_type, s->repo, s->id2);
4360 	if (err)
4361 		goto done;
4362 
4363 	switch (obj_type) {
4364 	case GOT_OBJ_TYPE_BLOB:
4365 		err = got_diff_objects_as_blobs(&s->lines, &s->nlines,
4366 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
4367 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
4368 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
4369 		break;
4370 	case GOT_OBJ_TYPE_TREE:
4371 		err = got_diff_objects_as_trees(&s->lines, &s->nlines,
4372 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
4373 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4374 		    s->force_text_diff, s->repo, s->f);
4375 		break;
4376 	case GOT_OBJ_TYPE_COMMIT: {
4377 		const struct got_object_id_queue *parent_ids;
4378 		struct got_object_qid *pid;
4379 		struct got_commit_object *commit2;
4380 		struct got_reflist_head *refs;
4381 
4382 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
4383 		if (err)
4384 			goto done;
4385 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
4386 		/* Show commit info if we're diffing to a parent/root commit. */
4387 		if (s->id1 == NULL) {
4388 			err = write_commit_info(&s->lines, &s->nlines, s->id2,
4389 			    refs, s->repo, s->f);
4390 			if (err)
4391 				goto done;
4392 		} else {
4393 			parent_ids = got_object_commit_get_parent_ids(commit2);
4394 			STAILQ_FOREACH(pid, parent_ids, entry) {
4395 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
4396 					err = write_commit_info(&s->lines,
4397 					    &s->nlines, s->id2, refs, s->repo,
4398 					    s->f);
4399 					if (err)
4400 						goto done;
4401 					break;
4402 				}
4403 			}
4404 		}
4405 		got_object_commit_close(commit2);
4406 
4407 		err = got_diff_objects_as_commits(&s->lines, &s->nlines,
4408 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
4409 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4410 		    s->force_text_diff, s->repo, s->f);
4411 		break;
4412 	}
4413 	default:
4414 		err = got_error(GOT_ERR_OBJ_TYPE);
4415 		break;
4416 	}
4417 done:
4418 	if (s->f && fflush(s->f) != 0 && err == NULL)
4419 		err = got_error_from_errno("fflush");
4420 	return err;
4421 }
4422 
4423 static void
4424 diff_view_indicate_progress(struct tog_view *view)
4425 {
4426 	mvwaddstr(view->window, 0, 0, "diffing...");
4427 	update_panels();
4428 	doupdate();
4429 }
4430 
4431 static const struct got_error *
4432 search_start_diff_view(struct tog_view *view)
4433 {
4434 	struct tog_diff_view_state *s = &view->state.diff;
4435 
4436 	s->matched_line = 0;
4437 	return NULL;
4438 }
4439 
4440 static const struct got_error *
4441 search_next_diff_view(struct tog_view *view)
4442 {
4443 	struct tog_diff_view_state *s = &view->state.diff;
4444 	const struct got_error *err = NULL;
4445 	int lineno;
4446 	char *line = NULL;
4447 	size_t linesize = 0;
4448 	ssize_t linelen;
4449 
4450 	if (!view->searching) {
4451 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4452 		return NULL;
4453 	}
4454 
4455 	if (s->matched_line) {
4456 		if (view->searching == TOG_SEARCH_FORWARD)
4457 			lineno = s->matched_line + 1;
4458 		else
4459 			lineno = s->matched_line - 1;
4460 	} else
4461 		lineno = s->first_displayed_line;
4462 
4463 	while (1) {
4464 		off_t offset;
4465 
4466 		if (lineno <= 0 || lineno > s->nlines) {
4467 			if (s->matched_line == 0) {
4468 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4469 				break;
4470 			}
4471 
4472 			if (view->searching == TOG_SEARCH_FORWARD)
4473 				lineno = 1;
4474 			else
4475 				lineno = s->nlines;
4476 		}
4477 
4478 		offset = s->lines[lineno - 1].offset;
4479 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
4480 			free(line);
4481 			return got_error_from_errno("fseeko");
4482 		}
4483 		linelen = getline(&line, &linesize, s->f);
4484 		if (linelen != -1) {
4485 			char *exstr;
4486 			err = expand_tab(&exstr, line);
4487 			if (err)
4488 				break;
4489 			if (match_line(exstr, &view->regex, 1,
4490 			    &view->regmatch)) {
4491 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4492 				s->matched_line = lineno;
4493 				free(exstr);
4494 				break;
4495 			}
4496 			free(exstr);
4497 		}
4498 		if (view->searching == TOG_SEARCH_FORWARD)
4499 			lineno++;
4500 		else
4501 			lineno--;
4502 	}
4503 	free(line);
4504 
4505 	if (s->matched_line) {
4506 		s->first_displayed_line = s->matched_line;
4507 		s->selected_line = 1;
4508 	}
4509 
4510 	return err;
4511 }
4512 
4513 static const struct got_error *
4514 close_diff_view(struct tog_view *view)
4515 {
4516 	const struct got_error *err = NULL;
4517 	struct tog_diff_view_state *s = &view->state.diff;
4518 
4519 	free(s->id1);
4520 	s->id1 = NULL;
4521 	free(s->id2);
4522 	s->id2 = NULL;
4523 	if (s->f && fclose(s->f) == EOF)
4524 		err = got_error_from_errno("fclose");
4525 	s->f = NULL;
4526 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
4527 		err = got_error_from_errno("fclose");
4528 	s->f1 = NULL;
4529 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
4530 		err = got_error_from_errno("fclose");
4531 	s->f2 = NULL;
4532 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
4533 		err = got_error_from_errno("close");
4534 	s->fd1 = -1;
4535 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
4536 		err = got_error_from_errno("close");
4537 	s->fd2 = -1;
4538 	free(s->lines);
4539 	s->lines = NULL;
4540 	s->nlines = 0;
4541 	return err;
4542 }
4543 
4544 static const struct got_error *
4545 open_diff_view(struct tog_view *view, struct got_object_id *id1,
4546     struct got_object_id *id2, const char *label1, const char *label2,
4547     int diff_context, int ignore_whitespace, int force_text_diff,
4548     struct tog_view *parent_view, struct got_repository *repo)
4549 {
4550 	const struct got_error *err;
4551 	struct tog_diff_view_state *s = &view->state.diff;
4552 
4553 	memset(s, 0, sizeof(*s));
4554 	s->fd1 = -1;
4555 	s->fd2 = -1;
4556 
4557 	if (id1 != NULL && id2 != NULL) {
4558 	    int type1, type2;
4559 	    err = got_object_get_type(&type1, repo, id1);
4560 	    if (err)
4561 		return err;
4562 	    err = got_object_get_type(&type2, repo, id2);
4563 	    if (err)
4564 		return err;
4565 
4566 	    if (type1 != type2)
4567 		return got_error(GOT_ERR_OBJ_TYPE);
4568 	}
4569 	s->first_displayed_line = 1;
4570 	s->last_displayed_line = view->nlines;
4571 	s->selected_line = 1;
4572 	s->repo = repo;
4573 	s->id1 = id1;
4574 	s->id2 = id2;
4575 	s->label1 = label1;
4576 	s->label2 = label2;
4577 
4578 	if (id1) {
4579 		s->id1 = got_object_id_dup(id1);
4580 		if (s->id1 == NULL)
4581 			return got_error_from_errno("got_object_id_dup");
4582 	} else
4583 		s->id1 = NULL;
4584 
4585 	s->id2 = got_object_id_dup(id2);
4586 	if (s->id2 == NULL) {
4587 		err = got_error_from_errno("got_object_id_dup");
4588 		goto done;
4589 	}
4590 
4591 	s->f1 = got_opentemp();
4592 	if (s->f1 == NULL) {
4593 		err = got_error_from_errno("got_opentemp");
4594 		goto done;
4595 	}
4596 
4597 	s->f2 = got_opentemp();
4598 	if (s->f2 == NULL) {
4599 		err = got_error_from_errno("got_opentemp");
4600 		goto done;
4601 	}
4602 
4603 	s->fd1 = got_opentempfd();
4604 	if (s->fd1 == -1) {
4605 		err = got_error_from_errno("got_opentempfd");
4606 		goto done;
4607 	}
4608 
4609 	s->fd2 = got_opentempfd();
4610 	if (s->fd2 == -1) {
4611 		err = got_error_from_errno("got_opentempfd");
4612 		goto done;
4613 	}
4614 
4615 	s->first_displayed_line = 1;
4616 	s->last_displayed_line = view->nlines;
4617 	s->diff_context = diff_context;
4618 	s->ignore_whitespace = ignore_whitespace;
4619 	s->force_text_diff = force_text_diff;
4620 	s->parent_view = parent_view;
4621 	s->repo = repo;
4622 
4623 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4624 		int rc;
4625 
4626 		rc = init_pair(GOT_DIFF_LINE_MINUS,
4627 		    get_color_value("TOG_COLOR_DIFF_MINUS"), -1);
4628 		if (rc != ERR)
4629 			rc = init_pair(GOT_DIFF_LINE_PLUS,
4630 			    get_color_value("TOG_COLOR_DIFF_PLUS"), -1);
4631 		if (rc != ERR)
4632 			rc = init_pair(GOT_DIFF_LINE_HUNK,
4633 			    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"), -1);
4634 		if (rc != ERR)
4635 			rc = init_pair(GOT_DIFF_LINE_META,
4636 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4637 		if (rc != ERR)
4638 			rc = init_pair(GOT_DIFF_LINE_CHANGES,
4639 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4640 		if (rc != ERR)
4641 			rc = init_pair(GOT_DIFF_LINE_BLOB_MIN,
4642 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4643 		if (rc != ERR)
4644 			rc = init_pair(GOT_DIFF_LINE_BLOB_PLUS,
4645 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4646 		if (rc != ERR)
4647 			rc = init_pair(GOT_DIFF_LINE_AUTHOR,
4648 			    get_color_value("TOG_COLOR_AUTHOR"), -1);
4649 		if (rc != ERR)
4650 			rc = init_pair(GOT_DIFF_LINE_DATE,
4651 			    get_color_value("TOG_COLOR_DATE"), -1);
4652 		if (rc == ERR) {
4653 			err = got_error(GOT_ERR_RANGE);
4654 			goto done;
4655 		}
4656 	}
4657 
4658 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
4659 	    view_is_splitscreen(view))
4660 		show_log_view(parent_view); /* draw border */
4661 	diff_view_indicate_progress(view);
4662 
4663 	err = create_diff(s);
4664 
4665 	view->show = show_diff_view;
4666 	view->input = input_diff_view;
4667 	view->reset = reset_diff_view;
4668 	view->close = close_diff_view;
4669 	view->search_start = search_start_diff_view;
4670 	view->search_next = search_next_diff_view;
4671 done:
4672 	if (err)
4673 		close_diff_view(view);
4674 	return err;
4675 }
4676 
4677 static const struct got_error *
4678 show_diff_view(struct tog_view *view)
4679 {
4680 	const struct got_error *err;
4681 	struct tog_diff_view_state *s = &view->state.diff;
4682 	char *id_str1 = NULL, *id_str2, *header;
4683 	const char *label1, *label2;
4684 
4685 	if (s->id1) {
4686 		err = got_object_id_str(&id_str1, s->id1);
4687 		if (err)
4688 			return err;
4689 		label1 = s->label1 ? : id_str1;
4690 	} else
4691 		label1 = "/dev/null";
4692 
4693 	err = got_object_id_str(&id_str2, s->id2);
4694 	if (err)
4695 		return err;
4696 	label2 = s->label2 ? : id_str2;
4697 
4698 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4699 		err = got_error_from_errno("asprintf");
4700 		free(id_str1);
4701 		free(id_str2);
4702 		return err;
4703 	}
4704 	free(id_str1);
4705 	free(id_str2);
4706 
4707 	err = draw_file(view, header);
4708 	free(header);
4709 	return err;
4710 }
4711 
4712 static const struct got_error *
4713 set_selected_commit(struct tog_diff_view_state *s,
4714     struct commit_queue_entry *entry)
4715 {
4716 	const struct got_error *err;
4717 	const struct got_object_id_queue *parent_ids;
4718 	struct got_commit_object *selected_commit;
4719 	struct got_object_qid *pid;
4720 
4721 	free(s->id2);
4722 	s->id2 = got_object_id_dup(entry->id);
4723 	if (s->id2 == NULL)
4724 		return got_error_from_errno("got_object_id_dup");
4725 
4726 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4727 	if (err)
4728 		return err;
4729 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4730 	free(s->id1);
4731 	pid = STAILQ_FIRST(parent_ids);
4732 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4733 	got_object_commit_close(selected_commit);
4734 	return NULL;
4735 }
4736 
4737 static const struct got_error *
4738 reset_diff_view(struct tog_view *view)
4739 {
4740 	struct tog_diff_view_state *s = &view->state.diff;
4741 
4742 	view->count = 0;
4743 	wclear(view->window);
4744 	s->first_displayed_line = 1;
4745 	s->last_displayed_line = view->nlines;
4746 	s->matched_line = 0;
4747 	diff_view_indicate_progress(view);
4748 	return create_diff(s);
4749 }
4750 
4751 static void
4752 diff_prev_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4753 {
4754 	int start, i;
4755 
4756 	i = start = s->first_displayed_line - 1;
4757 
4758 	while (s->lines[i].type != type) {
4759 		if (i == 0)
4760 			i = s->nlines - 1;
4761 		if (--i == start)
4762 			return; /* do nothing, requested type not in file */
4763 	}
4764 
4765 	s->selected_line = 1;
4766 	s->first_displayed_line = i;
4767 }
4768 
4769 static void
4770 diff_next_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4771 {
4772 	int start, i;
4773 
4774 	i = start = s->first_displayed_line + 1;
4775 
4776 	while (s->lines[i].type != type) {
4777 		if (i == s->nlines - 1)
4778 			i = 0;
4779 		if (++i == start)
4780 			return; /* do nothing, requested type not in file */
4781 	}
4782 
4783 	s->selected_line = 1;
4784 	s->first_displayed_line = i;
4785 }
4786 
4787 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
4788     int, int, int);
4789 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
4790     int, int);
4791 
4792 static const struct got_error *
4793 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4794 {
4795 	const struct got_error *err = NULL;
4796 	struct tog_diff_view_state *s = &view->state.diff;
4797 	struct tog_log_view_state *ls;
4798 	struct commit_queue_entry *old_selected_entry;
4799 	char *line = NULL;
4800 	size_t linesize = 0;
4801 	ssize_t linelen;
4802 	int i, nscroll = view->nlines - 1, up = 0;
4803 
4804 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
4805 
4806 	switch (ch) {
4807 	case '0':
4808 		view->x = 0;
4809 		break;
4810 	case '$':
4811 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4812 		view->count = 0;
4813 		break;
4814 	case KEY_RIGHT:
4815 	case 'l':
4816 		if (view->x + view->ncols / 3 < view->maxx)
4817 			view->x += 2;  /* move two columns right */
4818 		else
4819 			view->count = 0;
4820 		break;
4821 	case KEY_LEFT:
4822 	case 'h':
4823 		view->x -= MIN(view->x, 2);  /* move two columns back */
4824 		if (view->x <= 0)
4825 			view->count = 0;
4826 		break;
4827 	case 'a':
4828 	case 'w':
4829 		if (ch == 'a')
4830 			s->force_text_diff = !s->force_text_diff;
4831 		if (ch == 'w')
4832 			s->ignore_whitespace = !s->ignore_whitespace;
4833 		err = reset_diff_view(view);
4834 		break;
4835 	case 'g':
4836 	case KEY_HOME:
4837 		s->first_displayed_line = 1;
4838 		view->count = 0;
4839 		break;
4840 	case 'G':
4841 	case KEY_END:
4842 		view->count = 0;
4843 		if (s->eof)
4844 			break;
4845 
4846 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4847 		s->eof = 1;
4848 		break;
4849 	case 'k':
4850 	case KEY_UP:
4851 	case CTRL('p'):
4852 		if (s->first_displayed_line > 1)
4853 			s->first_displayed_line--;
4854 		else
4855 			view->count = 0;
4856 		break;
4857 	case CTRL('u'):
4858 	case 'u':
4859 		nscroll /= 2;
4860 		/* FALL THROUGH */
4861 	case KEY_PPAGE:
4862 	case CTRL('b'):
4863 	case 'b':
4864 		if (s->first_displayed_line == 1) {
4865 			view->count = 0;
4866 			break;
4867 		}
4868 		i = 0;
4869 		while (i++ < nscroll && s->first_displayed_line > 1)
4870 			s->first_displayed_line--;
4871 		break;
4872 	case 'j':
4873 	case KEY_DOWN:
4874 	case CTRL('n'):
4875 		if (!s->eof)
4876 			s->first_displayed_line++;
4877 		else
4878 			view->count = 0;
4879 		break;
4880 	case CTRL('d'):
4881 	case 'd':
4882 		nscroll /= 2;
4883 		/* FALL THROUGH */
4884 	case KEY_NPAGE:
4885 	case CTRL('f'):
4886 	case 'f':
4887 	case ' ':
4888 		if (s->eof) {
4889 			view->count = 0;
4890 			break;
4891 		}
4892 		i = 0;
4893 		while (!s->eof && i++ < nscroll) {
4894 			linelen = getline(&line, &linesize, s->f);
4895 			s->first_displayed_line++;
4896 			if (linelen == -1) {
4897 				if (feof(s->f)) {
4898 					s->eof = 1;
4899 				} else
4900 					err = got_ferror(s->f, GOT_ERR_IO);
4901 				break;
4902 			}
4903 		}
4904 		free(line);
4905 		break;
4906 	case '(':
4907 		diff_prev_index(s, GOT_DIFF_LINE_BLOB_MIN);
4908 		break;
4909 	case ')':
4910 		diff_next_index(s, GOT_DIFF_LINE_BLOB_MIN);
4911 		break;
4912 	case '{':
4913 		diff_prev_index(s, GOT_DIFF_LINE_HUNK);
4914 		break;
4915 	case '}':
4916 		diff_next_index(s, GOT_DIFF_LINE_HUNK);
4917 		break;
4918 	case '[':
4919 		if (s->diff_context > 0) {
4920 			s->diff_context--;
4921 			s->matched_line = 0;
4922 			diff_view_indicate_progress(view);
4923 			err = create_diff(s);
4924 			if (s->first_displayed_line + view->nlines - 1 >
4925 			    s->nlines) {
4926 				s->first_displayed_line = 1;
4927 				s->last_displayed_line = view->nlines;
4928 			}
4929 		} else
4930 			view->count = 0;
4931 		break;
4932 	case ']':
4933 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4934 			s->diff_context++;
4935 			s->matched_line = 0;
4936 			diff_view_indicate_progress(view);
4937 			err = create_diff(s);
4938 		} else
4939 			view->count = 0;
4940 		break;
4941 	case '<':
4942 	case ',':
4943 	case 'K':
4944 		up = 1;
4945 		/* FALL THROUGH */
4946 	case '>':
4947 	case '.':
4948 	case 'J':
4949 		if (s->parent_view == NULL) {
4950 			view->count = 0;
4951 			break;
4952 		}
4953 		s->parent_view->count = view->count;
4954 
4955 		if (s->parent_view->type == TOG_VIEW_LOG) {
4956 			ls = &s->parent_view->state.log;
4957 			old_selected_entry = ls->selected_entry;
4958 
4959 			err = input_log_view(NULL, s->parent_view,
4960 			    up ? KEY_UP : KEY_DOWN);
4961 			if (err)
4962 				break;
4963 			view->count = s->parent_view->count;
4964 
4965 			if (old_selected_entry == ls->selected_entry)
4966 				break;
4967 
4968 			err = set_selected_commit(s, ls->selected_entry);
4969 			if (err)
4970 				break;
4971 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
4972 			struct tog_blame_view_state *bs;
4973 			struct got_object_id *id, *prev_id;
4974 
4975 			bs = &s->parent_view->state.blame;
4976 			prev_id = get_annotation_for_line(bs->blame.lines,
4977 			    bs->blame.nlines, bs->last_diffed_line);
4978 
4979 			err = input_blame_view(&view, s->parent_view,
4980 			    up ? KEY_UP : KEY_DOWN);
4981 			if (err)
4982 				break;
4983 			view->count = s->parent_view->count;
4984 
4985 			if (prev_id == NULL)
4986 				break;
4987 			id = get_selected_commit_id(bs->blame.lines,
4988 			    bs->blame.nlines, bs->first_displayed_line,
4989 			    bs->selected_line);
4990 			if (id == NULL)
4991 				break;
4992 
4993 			if (!got_object_id_cmp(prev_id, id))
4994 				break;
4995 
4996 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
4997 			if (err)
4998 				break;
4999 		}
5000 		s->first_displayed_line = 1;
5001 		s->last_displayed_line = view->nlines;
5002 		s->matched_line = 0;
5003 		view->x = 0;
5004 
5005 		diff_view_indicate_progress(view);
5006 		err = create_diff(s);
5007 		break;
5008 	default:
5009 		view->count = 0;
5010 		break;
5011 	}
5012 
5013 	return err;
5014 }
5015 
5016 static const struct got_error *
5017 cmd_diff(int argc, char *argv[])
5018 {
5019 	const struct got_error *error = NULL;
5020 	struct got_repository *repo = NULL;
5021 	struct got_worktree *worktree = NULL;
5022 	struct got_object_id *id1 = NULL, *id2 = NULL;
5023 	char *repo_path = NULL, *cwd = NULL;
5024 	char *id_str1 = NULL, *id_str2 = NULL;
5025 	char *label1 = NULL, *label2 = NULL;
5026 	int diff_context = 3, ignore_whitespace = 0;
5027 	int ch, force_text_diff = 0;
5028 	const char *errstr;
5029 	struct tog_view *view;
5030 	int *pack_fds = NULL;
5031 
5032 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
5033 		switch (ch) {
5034 		case 'a':
5035 			force_text_diff = 1;
5036 			break;
5037 		case 'C':
5038 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
5039 			    &errstr);
5040 			if (errstr != NULL)
5041 				errx(1, "number of context lines is %s: %s",
5042 				    errstr, errstr);
5043 			break;
5044 		case 'r':
5045 			repo_path = realpath(optarg, NULL);
5046 			if (repo_path == NULL)
5047 				return got_error_from_errno2("realpath",
5048 				    optarg);
5049 			got_path_strip_trailing_slashes(repo_path);
5050 			break;
5051 		case 'w':
5052 			ignore_whitespace = 1;
5053 			break;
5054 		default:
5055 			usage_diff();
5056 			/* NOTREACHED */
5057 		}
5058 	}
5059 
5060 	argc -= optind;
5061 	argv += optind;
5062 
5063 	if (argc == 0) {
5064 		usage_diff(); /* TODO show local worktree changes */
5065 	} else if (argc == 2) {
5066 		id_str1 = argv[0];
5067 		id_str2 = argv[1];
5068 	} else
5069 		usage_diff();
5070 
5071 	error = got_repo_pack_fds_open(&pack_fds);
5072 	if (error)
5073 		goto done;
5074 
5075 	if (repo_path == NULL) {
5076 		cwd = getcwd(NULL, 0);
5077 		if (cwd == NULL)
5078 			return got_error_from_errno("getcwd");
5079 		error = got_worktree_open(&worktree, cwd);
5080 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5081 			goto done;
5082 		if (worktree)
5083 			repo_path =
5084 			    strdup(got_worktree_get_repo_path(worktree));
5085 		else
5086 			repo_path = strdup(cwd);
5087 		if (repo_path == NULL) {
5088 			error = got_error_from_errno("strdup");
5089 			goto done;
5090 		}
5091 	}
5092 
5093 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5094 	if (error)
5095 		goto done;
5096 
5097 	init_curses();
5098 
5099 	error = apply_unveil(got_repo_get_path(repo), NULL);
5100 	if (error)
5101 		goto done;
5102 
5103 	error = tog_load_refs(repo, 0);
5104 	if (error)
5105 		goto done;
5106 
5107 	error = got_repo_match_object_id(&id1, &label1, id_str1,
5108 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5109 	if (error)
5110 		goto done;
5111 
5112 	error = got_repo_match_object_id(&id2, &label2, id_str2,
5113 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5114 	if (error)
5115 		goto done;
5116 
5117 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
5118 	if (view == NULL) {
5119 		error = got_error_from_errno("view_open");
5120 		goto done;
5121 	}
5122 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
5123 	    ignore_whitespace, force_text_diff, NULL,  repo);
5124 	if (error)
5125 		goto done;
5126 	error = view_loop(view);
5127 done:
5128 	free(label1);
5129 	free(label2);
5130 	free(repo_path);
5131 	free(cwd);
5132 	if (repo) {
5133 		const struct got_error *close_err = got_repo_close(repo);
5134 		if (error == NULL)
5135 			error = close_err;
5136 	}
5137 	if (worktree)
5138 		got_worktree_close(worktree);
5139 	if (pack_fds) {
5140 		const struct got_error *pack_err =
5141 		    got_repo_pack_fds_close(pack_fds);
5142 		if (error == NULL)
5143 			error = pack_err;
5144 	}
5145 	tog_free_refs();
5146 	return error;
5147 }
5148 
5149 __dead static void
5150 usage_blame(void)
5151 {
5152 	endwin();
5153 	fprintf(stderr,
5154 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
5155 	    getprogname());
5156 	exit(1);
5157 }
5158 
5159 struct tog_blame_line {
5160 	int annotated;
5161 	struct got_object_id *id;
5162 };
5163 
5164 static const struct got_error *
5165 draw_blame(struct tog_view *view)
5166 {
5167 	struct tog_blame_view_state *s = &view->state.blame;
5168 	struct tog_blame *blame = &s->blame;
5169 	regmatch_t *regmatch = &view->regmatch;
5170 	const struct got_error *err;
5171 	int lineno = 0, nprinted = 0;
5172 	char *line = NULL;
5173 	size_t linesize = 0;
5174 	ssize_t linelen;
5175 	wchar_t *wline;
5176 	int width;
5177 	struct tog_blame_line *blame_line;
5178 	struct got_object_id *prev_id = NULL;
5179 	char *id_str;
5180 	struct tog_color *tc;
5181 
5182 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
5183 	if (err)
5184 		return err;
5185 
5186 	rewind(blame->f);
5187 	werase(view->window);
5188 
5189 	if (asprintf(&line, "commit %s", id_str) == -1) {
5190 		err = got_error_from_errno("asprintf");
5191 		free(id_str);
5192 		return err;
5193 	}
5194 
5195 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5196 	free(line);
5197 	line = NULL;
5198 	if (err)
5199 		return err;
5200 	if (view_needs_focus_indication(view))
5201 		wstandout(view->window);
5202 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5203 	if (tc)
5204 		wattr_on(view->window,
5205 		    COLOR_PAIR(tc->colorpair), NULL);
5206 	waddwstr(view->window, wline);
5207 	if (tc)
5208 		wattr_off(view->window,
5209 		    COLOR_PAIR(tc->colorpair), NULL);
5210 	if (view_needs_focus_indication(view))
5211 		wstandend(view->window);
5212 	free(wline);
5213 	wline = NULL;
5214 	if (width < view->ncols - 1)
5215 		waddch(view->window, '\n');
5216 
5217 	if (view->gline > blame->nlines)
5218 		view->gline = blame->nlines;
5219 
5220 	if (asprintf(&line, "[%d/%d] %s%s", view->gline ? view->gline :
5221 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
5222 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
5223 		free(id_str);
5224 		return got_error_from_errno("asprintf");
5225 	}
5226 	free(id_str);
5227 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5228 	free(line);
5229 	line = NULL;
5230 	if (err)
5231 		return err;
5232 	waddwstr(view->window, wline);
5233 	free(wline);
5234 	wline = NULL;
5235 	if (width < view->ncols - 1)
5236 		waddch(view->window, '\n');
5237 
5238 	s->eof = 0;
5239 	view->maxx = 0;
5240 	while (nprinted < view->nlines - 2) {
5241 		linelen = getline(&line, &linesize, blame->f);
5242 		if (linelen == -1) {
5243 			if (feof(blame->f)) {
5244 				s->eof = 1;
5245 				break;
5246 			}
5247 			free(line);
5248 			return got_ferror(blame->f, GOT_ERR_IO);
5249 		}
5250 		if (++lineno < s->first_displayed_line)
5251 			continue;
5252 		if (view->gline && !gotoline(view, &lineno, &nprinted))
5253 			continue;
5254 
5255 		/* Set view->maxx based on full line length. */
5256 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
5257 		if (err) {
5258 			free(line);
5259 			return err;
5260 		}
5261 		free(wline);
5262 		wline = NULL;
5263 		view->maxx = MAX(view->maxx, width);
5264 
5265 		if (nprinted == s->selected_line - 1)
5266 			wstandout(view->window);
5267 
5268 		if (blame->nlines > 0) {
5269 			blame_line = &blame->lines[lineno - 1];
5270 			if (blame_line->annotated && prev_id &&
5271 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
5272 			    !(nprinted == s->selected_line - 1)) {
5273 				waddstr(view->window, "        ");
5274 			} else if (blame_line->annotated) {
5275 				char *id_str;
5276 				err = got_object_id_str(&id_str,
5277 				    blame_line->id);
5278 				if (err) {
5279 					free(line);
5280 					return err;
5281 				}
5282 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5283 				if (tc)
5284 					wattr_on(view->window,
5285 					    COLOR_PAIR(tc->colorpair), NULL);
5286 				wprintw(view->window, "%.8s", id_str);
5287 				if (tc)
5288 					wattr_off(view->window,
5289 					    COLOR_PAIR(tc->colorpair), NULL);
5290 				free(id_str);
5291 				prev_id = blame_line->id;
5292 			} else {
5293 				waddstr(view->window, "........");
5294 				prev_id = NULL;
5295 			}
5296 		} else {
5297 			waddstr(view->window, "........");
5298 			prev_id = NULL;
5299 		}
5300 
5301 		if (nprinted == s->selected_line - 1)
5302 			wstandend(view->window);
5303 		waddstr(view->window, " ");
5304 
5305 		if (view->ncols <= 9) {
5306 			width = 9;
5307 		} else if (s->first_displayed_line + nprinted ==
5308 		    s->matched_line &&
5309 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
5310 			err = add_matched_line(&width, line, view->ncols - 9, 9,
5311 			    view->window, view->x, regmatch);
5312 			if (err) {
5313 				free(line);
5314 				return err;
5315 			}
5316 			width += 9;
5317 		} else {
5318 			int skip;
5319 			err = format_line(&wline, &width, &skip, line,
5320 			    view->x, view->ncols - 9, 9, 1);
5321 			if (err) {
5322 				free(line);
5323 				return err;
5324 			}
5325 			waddwstr(view->window, &wline[skip]);
5326 			width += 9;
5327 			free(wline);
5328 			wline = NULL;
5329 		}
5330 
5331 		if (width <= view->ncols - 1)
5332 			waddch(view->window, '\n');
5333 		if (++nprinted == 1)
5334 			s->first_displayed_line = lineno;
5335 	}
5336 	free(line);
5337 	s->last_displayed_line = lineno;
5338 
5339 	view_border(view);
5340 
5341 	return NULL;
5342 }
5343 
5344 static const struct got_error *
5345 blame_cb(void *arg, int nlines, int lineno,
5346     struct got_commit_object *commit, struct got_object_id *id)
5347 {
5348 	const struct got_error *err = NULL;
5349 	struct tog_blame_cb_args *a = arg;
5350 	struct tog_blame_line *line;
5351 	int errcode;
5352 
5353 	if (nlines != a->nlines ||
5354 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
5355 		return got_error(GOT_ERR_RANGE);
5356 
5357 	errcode = pthread_mutex_lock(&tog_mutex);
5358 	if (errcode)
5359 		return got_error_set_errno(errcode, "pthread_mutex_lock");
5360 
5361 	if (*a->quit) {	/* user has quit the blame view */
5362 		err = got_error(GOT_ERR_ITER_COMPLETED);
5363 		goto done;
5364 	}
5365 
5366 	if (lineno == -1)
5367 		goto done; /* no change in this commit */
5368 
5369 	line = &a->lines[lineno - 1];
5370 	if (line->annotated)
5371 		goto done;
5372 
5373 	line->id = got_object_id_dup(id);
5374 	if (line->id == NULL) {
5375 		err = got_error_from_errno("got_object_id_dup");
5376 		goto done;
5377 	}
5378 	line->annotated = 1;
5379 done:
5380 	errcode = pthread_mutex_unlock(&tog_mutex);
5381 	if (errcode)
5382 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5383 	return err;
5384 }
5385 
5386 static void *
5387 blame_thread(void *arg)
5388 {
5389 	const struct got_error *err, *close_err;
5390 	struct tog_blame_thread_args *ta = arg;
5391 	struct tog_blame_cb_args *a = ta->cb_args;
5392 	int errcode, fd1 = -1, fd2 = -1;
5393 	FILE *f1 = NULL, *f2 = NULL;
5394 
5395 	fd1 = got_opentempfd();
5396 	if (fd1 == -1)
5397 		return (void *)got_error_from_errno("got_opentempfd");
5398 
5399 	fd2 = got_opentempfd();
5400 	if (fd2 == -1) {
5401 		err = got_error_from_errno("got_opentempfd");
5402 		goto done;
5403 	}
5404 
5405 	f1 = got_opentemp();
5406 	if (f1 == NULL) {
5407 		err = (void *)got_error_from_errno("got_opentemp");
5408 		goto done;
5409 	}
5410 	f2 = got_opentemp();
5411 	if (f2 == NULL) {
5412 		err = (void *)got_error_from_errno("got_opentemp");
5413 		goto done;
5414 	}
5415 
5416 	err = block_signals_used_by_main_thread();
5417 	if (err)
5418 		goto done;
5419 
5420 	err = got_blame(ta->path, a->commit_id, ta->repo,
5421 	    tog_diff_algo, blame_cb, ta->cb_args,
5422 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
5423 	if (err && err->code == GOT_ERR_CANCELLED)
5424 		err = NULL;
5425 
5426 	errcode = pthread_mutex_lock(&tog_mutex);
5427 	if (errcode) {
5428 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
5429 		goto done;
5430 	}
5431 
5432 	close_err = got_repo_close(ta->repo);
5433 	if (err == NULL)
5434 		err = close_err;
5435 	ta->repo = NULL;
5436 	*ta->complete = 1;
5437 
5438 	errcode = pthread_mutex_unlock(&tog_mutex);
5439 	if (errcode && err == NULL)
5440 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5441 
5442 done:
5443 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
5444 		err = got_error_from_errno("close");
5445 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
5446 		err = got_error_from_errno("close");
5447 	if (f1 && fclose(f1) == EOF && err == NULL)
5448 		err = got_error_from_errno("fclose");
5449 	if (f2 && fclose(f2) == EOF && err == NULL)
5450 		err = got_error_from_errno("fclose");
5451 
5452 	return (void *)err;
5453 }
5454 
5455 static struct got_object_id *
5456 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
5457     int first_displayed_line, int selected_line)
5458 {
5459 	struct tog_blame_line *line;
5460 
5461 	if (nlines <= 0)
5462 		return NULL;
5463 
5464 	line = &lines[first_displayed_line - 1 + selected_line - 1];
5465 	if (!line->annotated)
5466 		return NULL;
5467 
5468 	return line->id;
5469 }
5470 
5471 static struct got_object_id *
5472 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
5473     int lineno)
5474 {
5475 	struct tog_blame_line *line;
5476 
5477 	if (nlines <= 0 || lineno >= nlines)
5478 		return NULL;
5479 
5480 	line = &lines[lineno - 1];
5481 	if (!line->annotated)
5482 		return NULL;
5483 
5484 	return line->id;
5485 }
5486 
5487 static const struct got_error *
5488 stop_blame(struct tog_blame *blame)
5489 {
5490 	const struct got_error *err = NULL;
5491 	int i;
5492 
5493 	if (blame->thread) {
5494 		int errcode;
5495 		errcode = pthread_mutex_unlock(&tog_mutex);
5496 		if (errcode)
5497 			return got_error_set_errno(errcode,
5498 			    "pthread_mutex_unlock");
5499 		errcode = pthread_join(blame->thread, (void **)&err);
5500 		if (errcode)
5501 			return got_error_set_errno(errcode, "pthread_join");
5502 		errcode = pthread_mutex_lock(&tog_mutex);
5503 		if (errcode)
5504 			return got_error_set_errno(errcode,
5505 			    "pthread_mutex_lock");
5506 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
5507 			err = NULL;
5508 		blame->thread = NULL;
5509 	}
5510 	if (blame->thread_args.repo) {
5511 		const struct got_error *close_err;
5512 		close_err = got_repo_close(blame->thread_args.repo);
5513 		if (err == NULL)
5514 			err = close_err;
5515 		blame->thread_args.repo = NULL;
5516 	}
5517 	if (blame->f) {
5518 		if (fclose(blame->f) == EOF && err == NULL)
5519 			err = got_error_from_errno("fclose");
5520 		blame->f = NULL;
5521 	}
5522 	if (blame->lines) {
5523 		for (i = 0; i < blame->nlines; i++)
5524 			free(blame->lines[i].id);
5525 		free(blame->lines);
5526 		blame->lines = NULL;
5527 	}
5528 	free(blame->cb_args.commit_id);
5529 	blame->cb_args.commit_id = NULL;
5530 	if (blame->pack_fds) {
5531 		const struct got_error *pack_err =
5532 		    got_repo_pack_fds_close(blame->pack_fds);
5533 		if (err == NULL)
5534 			err = pack_err;
5535 		blame->pack_fds = NULL;
5536 	}
5537 	return err;
5538 }
5539 
5540 static const struct got_error *
5541 cancel_blame_view(void *arg)
5542 {
5543 	const struct got_error *err = NULL;
5544 	int *done = arg;
5545 	int errcode;
5546 
5547 	errcode = pthread_mutex_lock(&tog_mutex);
5548 	if (errcode)
5549 		return got_error_set_errno(errcode,
5550 		    "pthread_mutex_unlock");
5551 
5552 	if (*done)
5553 		err = got_error(GOT_ERR_CANCELLED);
5554 
5555 	errcode = pthread_mutex_unlock(&tog_mutex);
5556 	if (errcode)
5557 		return got_error_set_errno(errcode,
5558 		    "pthread_mutex_lock");
5559 
5560 	return err;
5561 }
5562 
5563 static const struct got_error *
5564 run_blame(struct tog_view *view)
5565 {
5566 	struct tog_blame_view_state *s = &view->state.blame;
5567 	struct tog_blame *blame = &s->blame;
5568 	const struct got_error *err = NULL;
5569 	struct got_commit_object *commit = NULL;
5570 	struct got_blob_object *blob = NULL;
5571 	struct got_repository *thread_repo = NULL;
5572 	struct got_object_id *obj_id = NULL;
5573 	int obj_type, fd = -1;
5574 	int *pack_fds = NULL;
5575 
5576 	err = got_object_open_as_commit(&commit, s->repo,
5577 	    &s->blamed_commit->id);
5578 	if (err)
5579 		return err;
5580 
5581 	fd = got_opentempfd();
5582 	if (fd == -1) {
5583 		err = got_error_from_errno("got_opentempfd");
5584 		goto done;
5585 	}
5586 
5587 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
5588 	if (err)
5589 		goto done;
5590 
5591 	err = got_object_get_type(&obj_type, s->repo, obj_id);
5592 	if (err)
5593 		goto done;
5594 
5595 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
5596 		err = got_error(GOT_ERR_OBJ_TYPE);
5597 		goto done;
5598 	}
5599 
5600 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
5601 	if (err)
5602 		goto done;
5603 	blame->f = got_opentemp();
5604 	if (blame->f == NULL) {
5605 		err = got_error_from_errno("got_opentemp");
5606 		goto done;
5607 	}
5608 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
5609 	    &blame->line_offsets, blame->f, blob);
5610 	if (err)
5611 		goto done;
5612 	if (blame->nlines == 0) {
5613 		s->blame_complete = 1;
5614 		goto done;
5615 	}
5616 
5617 	/* Don't include \n at EOF in the blame line count. */
5618 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
5619 		blame->nlines--;
5620 
5621 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
5622 	if (blame->lines == NULL) {
5623 		err = got_error_from_errno("calloc");
5624 		goto done;
5625 	}
5626 
5627 	err = got_repo_pack_fds_open(&pack_fds);
5628 	if (err)
5629 		goto done;
5630 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
5631 	    pack_fds);
5632 	if (err)
5633 		goto done;
5634 
5635 	blame->pack_fds = pack_fds;
5636 	blame->cb_args.view = view;
5637 	blame->cb_args.lines = blame->lines;
5638 	blame->cb_args.nlines = blame->nlines;
5639 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
5640 	if (blame->cb_args.commit_id == NULL) {
5641 		err = got_error_from_errno("got_object_id_dup");
5642 		goto done;
5643 	}
5644 	blame->cb_args.quit = &s->done;
5645 
5646 	blame->thread_args.path = s->path;
5647 	blame->thread_args.repo = thread_repo;
5648 	blame->thread_args.cb_args = &blame->cb_args;
5649 	blame->thread_args.complete = &s->blame_complete;
5650 	blame->thread_args.cancel_cb = cancel_blame_view;
5651 	blame->thread_args.cancel_arg = &s->done;
5652 	s->blame_complete = 0;
5653 
5654 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
5655 		s->first_displayed_line = 1;
5656 		s->last_displayed_line = view->nlines;
5657 		s->selected_line = 1;
5658 	}
5659 	s->matched_line = 0;
5660 
5661 done:
5662 	if (commit)
5663 		got_object_commit_close(commit);
5664 	if (fd != -1 && close(fd) == -1 && err == NULL)
5665 		err = got_error_from_errno("close");
5666 	if (blob)
5667 		got_object_blob_close(blob);
5668 	free(obj_id);
5669 	if (err)
5670 		stop_blame(blame);
5671 	return err;
5672 }
5673 
5674 static const struct got_error *
5675 open_blame_view(struct tog_view *view, char *path,
5676     struct got_object_id *commit_id, struct got_repository *repo)
5677 {
5678 	const struct got_error *err = NULL;
5679 	struct tog_blame_view_state *s = &view->state.blame;
5680 
5681 	STAILQ_INIT(&s->blamed_commits);
5682 
5683 	s->path = strdup(path);
5684 	if (s->path == NULL)
5685 		return got_error_from_errno("strdup");
5686 
5687 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
5688 	if (err) {
5689 		free(s->path);
5690 		return err;
5691 	}
5692 
5693 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
5694 	s->first_displayed_line = 1;
5695 	s->last_displayed_line = view->nlines;
5696 	s->selected_line = 1;
5697 	s->blame_complete = 0;
5698 	s->repo = repo;
5699 	s->commit_id = commit_id;
5700 	memset(&s->blame, 0, sizeof(s->blame));
5701 
5702 	STAILQ_INIT(&s->colors);
5703 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5704 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
5705 		    get_color_value("TOG_COLOR_COMMIT"));
5706 		if (err)
5707 			return err;
5708 	}
5709 
5710 	view->show = show_blame_view;
5711 	view->input = input_blame_view;
5712 	view->reset = reset_blame_view;
5713 	view->close = close_blame_view;
5714 	view->search_start = search_start_blame_view;
5715 	view->search_next = search_next_blame_view;
5716 
5717 	return run_blame(view);
5718 }
5719 
5720 static const struct got_error *
5721 close_blame_view(struct tog_view *view)
5722 {
5723 	const struct got_error *err = NULL;
5724 	struct tog_blame_view_state *s = &view->state.blame;
5725 
5726 	if (s->blame.thread)
5727 		err = stop_blame(&s->blame);
5728 
5729 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
5730 		struct got_object_qid *blamed_commit;
5731 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
5732 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5733 		got_object_qid_free(blamed_commit);
5734 	}
5735 
5736 	free(s->path);
5737 	free_colors(&s->colors);
5738 	return err;
5739 }
5740 
5741 static const struct got_error *
5742 search_start_blame_view(struct tog_view *view)
5743 {
5744 	struct tog_blame_view_state *s = &view->state.blame;
5745 
5746 	s->matched_line = 0;
5747 	return NULL;
5748 }
5749 
5750 static const struct got_error *
5751 search_next_blame_view(struct tog_view *view)
5752 {
5753 	struct tog_blame_view_state *s = &view->state.blame;
5754 	const struct got_error *err = NULL;
5755 	int lineno;
5756 	char *line = NULL;
5757 	size_t linesize = 0;
5758 	ssize_t linelen;
5759 
5760 	if (!view->searching) {
5761 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5762 		return NULL;
5763 	}
5764 
5765 	if (s->matched_line) {
5766 		if (view->searching == TOG_SEARCH_FORWARD)
5767 			lineno = s->matched_line + 1;
5768 		else
5769 			lineno = s->matched_line - 1;
5770 	} else
5771 		lineno = s->first_displayed_line - 1 + s->selected_line;
5772 
5773 	while (1) {
5774 		off_t offset;
5775 
5776 		if (lineno <= 0 || lineno > s->blame.nlines) {
5777 			if (s->matched_line == 0) {
5778 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5779 				break;
5780 			}
5781 
5782 			if (view->searching == TOG_SEARCH_FORWARD)
5783 				lineno = 1;
5784 			else
5785 				lineno = s->blame.nlines;
5786 		}
5787 
5788 		offset = s->blame.line_offsets[lineno - 1];
5789 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5790 			free(line);
5791 			return got_error_from_errno("fseeko");
5792 		}
5793 		linelen = getline(&line, &linesize, s->blame.f);
5794 		if (linelen != -1) {
5795 			char *exstr;
5796 			err = expand_tab(&exstr, line);
5797 			if (err)
5798 				break;
5799 			if (match_line(exstr, &view->regex, 1,
5800 			    &view->regmatch)) {
5801 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5802 				s->matched_line = lineno;
5803 				free(exstr);
5804 				break;
5805 			}
5806 			free(exstr);
5807 		}
5808 		if (view->searching == TOG_SEARCH_FORWARD)
5809 			lineno++;
5810 		else
5811 			lineno--;
5812 	}
5813 	free(line);
5814 
5815 	if (s->matched_line) {
5816 		s->first_displayed_line = s->matched_line;
5817 		s->selected_line = 1;
5818 	}
5819 
5820 	return err;
5821 }
5822 
5823 static const struct got_error *
5824 show_blame_view(struct tog_view *view)
5825 {
5826 	const struct got_error *err = NULL;
5827 	struct tog_blame_view_state *s = &view->state.blame;
5828 	int errcode;
5829 
5830 	if (s->blame.thread == NULL && !s->blame_complete) {
5831 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5832 		    &s->blame.thread_args);
5833 		if (errcode)
5834 			return got_error_set_errno(errcode, "pthread_create");
5835 
5836 		halfdelay(1); /* fast refresh while annotating  */
5837 	}
5838 
5839 	if (s->blame_complete)
5840 		halfdelay(10); /* disable fast refresh */
5841 
5842 	err = draw_blame(view);
5843 
5844 	view_border(view);
5845 	return err;
5846 }
5847 
5848 static const struct got_error *
5849 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
5850     struct got_repository *repo, struct got_object_id *id)
5851 {
5852 	struct tog_view		*log_view;
5853 	const struct got_error	*err = NULL;
5854 
5855 	*new_view = NULL;
5856 
5857 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
5858 	if (log_view == NULL)
5859 		return got_error_from_errno("view_open");
5860 
5861 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0);
5862 	if (err)
5863 		view_close(log_view);
5864 	else
5865 		*new_view = log_view;
5866 
5867 	return err;
5868 }
5869 
5870 static const struct got_error *
5871 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5872 {
5873 	const struct got_error *err = NULL, *thread_err = NULL;
5874 	struct tog_view *diff_view;
5875 	struct tog_blame_view_state *s = &view->state.blame;
5876 	int eos, nscroll, begin_y = 0, begin_x = 0;
5877 
5878 	eos = nscroll = view->nlines - 2;
5879 	if (view_is_hsplit_top(view))
5880 		--eos;  /* border */
5881 
5882 	switch (ch) {
5883 	case '0':
5884 		view->x = 0;
5885 		break;
5886 	case '$':
5887 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5888 		view->count = 0;
5889 		break;
5890 	case KEY_RIGHT:
5891 	case 'l':
5892 		if (view->x + view->ncols / 3 < view->maxx)
5893 			view->x += 2;  /* move two columns right */
5894 		else
5895 			view->count = 0;
5896 		break;
5897 	case KEY_LEFT:
5898 	case 'h':
5899 		view->x -= MIN(view->x, 2);  /* move two columns back */
5900 		if (view->x <= 0)
5901 			view->count = 0;
5902 		break;
5903 	case 'q':
5904 		s->done = 1;
5905 		break;
5906 	case 'g':
5907 	case KEY_HOME:
5908 		s->selected_line = 1;
5909 		s->first_displayed_line = 1;
5910 		view->count = 0;
5911 		break;
5912 	case 'G':
5913 	case KEY_END:
5914 		if (s->blame.nlines < eos) {
5915 			s->selected_line = s->blame.nlines;
5916 			s->first_displayed_line = 1;
5917 		} else {
5918 			s->selected_line = eos;
5919 			s->first_displayed_line = s->blame.nlines - (eos - 1);
5920 		}
5921 		view->count = 0;
5922 		break;
5923 	case 'k':
5924 	case KEY_UP:
5925 	case CTRL('p'):
5926 		if (s->selected_line > 1)
5927 			s->selected_line--;
5928 		else if (s->selected_line == 1 &&
5929 		    s->first_displayed_line > 1)
5930 			s->first_displayed_line--;
5931 		else
5932 			view->count = 0;
5933 		break;
5934 	case CTRL('u'):
5935 	case 'u':
5936 		nscroll /= 2;
5937 		/* FALL THROUGH */
5938 	case KEY_PPAGE:
5939 	case CTRL('b'):
5940 	case 'b':
5941 		if (s->first_displayed_line == 1) {
5942 			if (view->count > 1)
5943 				nscroll += nscroll;
5944 			s->selected_line = MAX(1, s->selected_line - nscroll);
5945 			view->count = 0;
5946 			break;
5947 		}
5948 		if (s->first_displayed_line > nscroll)
5949 			s->first_displayed_line -= nscroll;
5950 		else
5951 			s->first_displayed_line = 1;
5952 		break;
5953 	case 'j':
5954 	case KEY_DOWN:
5955 	case CTRL('n'):
5956 		if (s->selected_line < eos && s->first_displayed_line +
5957 		    s->selected_line <= s->blame.nlines)
5958 			s->selected_line++;
5959 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
5960 			s->first_displayed_line++;
5961 		else
5962 			view->count = 0;
5963 		break;
5964 	case 'c':
5965 	case 'p': {
5966 		struct got_object_id *id = NULL;
5967 
5968 		view->count = 0;
5969 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5970 		    s->first_displayed_line, s->selected_line);
5971 		if (id == NULL)
5972 			break;
5973 		if (ch == 'p') {
5974 			struct got_commit_object *commit, *pcommit;
5975 			struct got_object_qid *pid;
5976 			struct got_object_id *blob_id = NULL;
5977 			int obj_type;
5978 			err = got_object_open_as_commit(&commit,
5979 			    s->repo, id);
5980 			if (err)
5981 				break;
5982 			pid = STAILQ_FIRST(
5983 			    got_object_commit_get_parent_ids(commit));
5984 			if (pid == NULL) {
5985 				got_object_commit_close(commit);
5986 				break;
5987 			}
5988 			/* Check if path history ends here. */
5989 			err = got_object_open_as_commit(&pcommit,
5990 			    s->repo, &pid->id);
5991 			if (err)
5992 				break;
5993 			err = got_object_id_by_path(&blob_id, s->repo,
5994 			    pcommit, s->path);
5995 			got_object_commit_close(pcommit);
5996 			if (err) {
5997 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5998 					err = NULL;
5999 				got_object_commit_close(commit);
6000 				break;
6001 			}
6002 			err = got_object_get_type(&obj_type, s->repo,
6003 			    blob_id);
6004 			free(blob_id);
6005 			/* Can't blame non-blob type objects. */
6006 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
6007 				got_object_commit_close(commit);
6008 				break;
6009 			}
6010 			err = got_object_qid_alloc(&s->blamed_commit,
6011 			    &pid->id);
6012 			got_object_commit_close(commit);
6013 		} else {
6014 			if (got_object_id_cmp(id,
6015 			    &s->blamed_commit->id) == 0)
6016 				break;
6017 			err = got_object_qid_alloc(&s->blamed_commit,
6018 			    id);
6019 		}
6020 		if (err)
6021 			break;
6022 		s->done = 1;
6023 		thread_err = stop_blame(&s->blame);
6024 		s->done = 0;
6025 		if (thread_err)
6026 			break;
6027 		STAILQ_INSERT_HEAD(&s->blamed_commits,
6028 		    s->blamed_commit, entry);
6029 		err = run_blame(view);
6030 		if (err)
6031 			break;
6032 		break;
6033 	}
6034 	case 'C': {
6035 		struct got_object_qid *first;
6036 
6037 		view->count = 0;
6038 		first = STAILQ_FIRST(&s->blamed_commits);
6039 		if (!got_object_id_cmp(&first->id, s->commit_id))
6040 			break;
6041 		s->done = 1;
6042 		thread_err = stop_blame(&s->blame);
6043 		s->done = 0;
6044 		if (thread_err)
6045 			break;
6046 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6047 		got_object_qid_free(s->blamed_commit);
6048 		s->blamed_commit =
6049 		    STAILQ_FIRST(&s->blamed_commits);
6050 		err = run_blame(view);
6051 		if (err)
6052 			break;
6053 		break;
6054 	}
6055 	case 'L':
6056 		view->count = 0;
6057 		s->id_to_log = get_selected_commit_id(s->blame.lines,
6058 		    s->blame.nlines, s->first_displayed_line, s->selected_line);
6059 		if (s->id_to_log)
6060 			err = view_request_new(new_view, view, TOG_VIEW_LOG);
6061 		break;
6062 	case KEY_ENTER:
6063 	case '\r': {
6064 		struct got_object_id *id = NULL;
6065 		struct got_object_qid *pid;
6066 		struct got_commit_object *commit = NULL;
6067 
6068 		view->count = 0;
6069 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
6070 		    s->first_displayed_line, s->selected_line);
6071 		if (id == NULL)
6072 			break;
6073 		err = got_object_open_as_commit(&commit, s->repo, id);
6074 		if (err)
6075 			break;
6076 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
6077 		if (*new_view) {
6078 			/* traversed from diff view, release diff resources  */
6079 			err = close_diff_view(*new_view);
6080 			if (err)
6081 				break;
6082 			diff_view = *new_view;
6083 		} else {
6084 			if (view_is_parent_view(view))
6085 				view_get_split(view, &begin_y, &begin_x);
6086 
6087 			diff_view = view_open(0, 0, begin_y, begin_x,
6088 			    TOG_VIEW_DIFF);
6089 			if (diff_view == NULL) {
6090 				got_object_commit_close(commit);
6091 				err = got_error_from_errno("view_open");
6092 				break;
6093 			}
6094 		}
6095 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
6096 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
6097 		got_object_commit_close(commit);
6098 		if (err) {
6099 			view_close(diff_view);
6100 			break;
6101 		}
6102 		s->last_diffed_line = s->first_displayed_line - 1 +
6103 		    s->selected_line;
6104 		if (*new_view)
6105 			break;	/* still open from active diff view */
6106 		if (view_is_parent_view(view) &&
6107 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6108 			err = view_init_hsplit(view, begin_y);
6109 			if (err)
6110 				break;
6111 		}
6112 
6113 		view->focussed = 0;
6114 		diff_view->focussed = 1;
6115 		diff_view->mode = view->mode;
6116 		diff_view->nlines = view->lines - begin_y;
6117 		if (view_is_parent_view(view)) {
6118 			view_transfer_size(diff_view, view);
6119 			err = view_close_child(view);
6120 			if (err)
6121 				break;
6122 			err = view_set_child(view, diff_view);
6123 			if (err)
6124 				break;
6125 			view->focus_child = 1;
6126 		} else
6127 			*new_view = diff_view;
6128 		if (err)
6129 			break;
6130 		break;
6131 	}
6132 	case CTRL('d'):
6133 	case 'd':
6134 		nscroll /= 2;
6135 		/* FALL THROUGH */
6136 	case KEY_NPAGE:
6137 	case CTRL('f'):
6138 	case 'f':
6139 	case ' ':
6140 		if (s->last_displayed_line >= s->blame.nlines &&
6141 		    s->selected_line >= MIN(s->blame.nlines,
6142 		    view->nlines - 2)) {
6143 			view->count = 0;
6144 			break;
6145 		}
6146 		if (s->last_displayed_line >= s->blame.nlines &&
6147 		    s->selected_line < view->nlines - 2) {
6148 			s->selected_line +=
6149 			    MIN(nscroll, s->last_displayed_line -
6150 			    s->first_displayed_line - s->selected_line + 1);
6151 		}
6152 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
6153 			s->first_displayed_line += nscroll;
6154 		else
6155 			s->first_displayed_line =
6156 			    s->blame.nlines - (view->nlines - 3);
6157 		break;
6158 	case KEY_RESIZE:
6159 		if (s->selected_line > view->nlines - 2) {
6160 			s->selected_line = MIN(s->blame.nlines,
6161 			    view->nlines - 2);
6162 		}
6163 		break;
6164 	default:
6165 		view->count = 0;
6166 		break;
6167 	}
6168 	return thread_err ? thread_err : err;
6169 }
6170 
6171 static const struct got_error *
6172 reset_blame_view(struct tog_view *view)
6173 {
6174 	const struct got_error *err;
6175 	struct tog_blame_view_state *s = &view->state.blame;
6176 
6177 	view->count = 0;
6178 	s->done = 1;
6179 	err = stop_blame(&s->blame);
6180 	s->done = 0;
6181 	if (err)
6182 		return err;
6183 	return run_blame(view);
6184 }
6185 
6186 static const struct got_error *
6187 cmd_blame(int argc, char *argv[])
6188 {
6189 	const struct got_error *error;
6190 	struct got_repository *repo = NULL;
6191 	struct got_worktree *worktree = NULL;
6192 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6193 	char *link_target = NULL;
6194 	struct got_object_id *commit_id = NULL;
6195 	struct got_commit_object *commit = NULL;
6196 	char *commit_id_str = NULL;
6197 	int ch;
6198 	struct tog_view *view;
6199 	int *pack_fds = NULL;
6200 
6201 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6202 		switch (ch) {
6203 		case 'c':
6204 			commit_id_str = optarg;
6205 			break;
6206 		case 'r':
6207 			repo_path = realpath(optarg, NULL);
6208 			if (repo_path == NULL)
6209 				return got_error_from_errno2("realpath",
6210 				    optarg);
6211 			break;
6212 		default:
6213 			usage_blame();
6214 			/* NOTREACHED */
6215 		}
6216 	}
6217 
6218 	argc -= optind;
6219 	argv += optind;
6220 
6221 	if (argc != 1)
6222 		usage_blame();
6223 
6224 	error = got_repo_pack_fds_open(&pack_fds);
6225 	if (error != NULL)
6226 		goto done;
6227 
6228 	if (repo_path == NULL) {
6229 		cwd = getcwd(NULL, 0);
6230 		if (cwd == NULL)
6231 			return got_error_from_errno("getcwd");
6232 		error = got_worktree_open(&worktree, cwd);
6233 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6234 			goto done;
6235 		if (worktree)
6236 			repo_path =
6237 			    strdup(got_worktree_get_repo_path(worktree));
6238 		else
6239 			repo_path = strdup(cwd);
6240 		if (repo_path == NULL) {
6241 			error = got_error_from_errno("strdup");
6242 			goto done;
6243 		}
6244 	}
6245 
6246 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6247 	if (error != NULL)
6248 		goto done;
6249 
6250 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
6251 	    worktree);
6252 	if (error)
6253 		goto done;
6254 
6255 	init_curses();
6256 
6257 	error = apply_unveil(got_repo_get_path(repo), NULL);
6258 	if (error)
6259 		goto done;
6260 
6261 	error = tog_load_refs(repo, 0);
6262 	if (error)
6263 		goto done;
6264 
6265 	if (commit_id_str == NULL) {
6266 		struct got_reference *head_ref;
6267 		error = got_ref_open(&head_ref, repo, worktree ?
6268 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
6269 		if (error != NULL)
6270 			goto done;
6271 		error = got_ref_resolve(&commit_id, repo, head_ref);
6272 		got_ref_close(head_ref);
6273 	} else {
6274 		error = got_repo_match_object_id(&commit_id, NULL,
6275 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6276 	}
6277 	if (error != NULL)
6278 		goto done;
6279 
6280 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
6281 	if (view == NULL) {
6282 		error = got_error_from_errno("view_open");
6283 		goto done;
6284 	}
6285 
6286 	error = got_object_open_as_commit(&commit, repo, commit_id);
6287 	if (error)
6288 		goto done;
6289 
6290 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
6291 	    commit, repo);
6292 	if (error)
6293 		goto done;
6294 
6295 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
6296 	    commit_id, repo);
6297 	if (error)
6298 		goto done;
6299 	if (worktree) {
6300 		/* Release work tree lock. */
6301 		got_worktree_close(worktree);
6302 		worktree = NULL;
6303 	}
6304 	error = view_loop(view);
6305 done:
6306 	free(repo_path);
6307 	free(in_repo_path);
6308 	free(link_target);
6309 	free(cwd);
6310 	free(commit_id);
6311 	if (commit)
6312 		got_object_commit_close(commit);
6313 	if (worktree)
6314 		got_worktree_close(worktree);
6315 	if (repo) {
6316 		const struct got_error *close_err = got_repo_close(repo);
6317 		if (error == NULL)
6318 			error = close_err;
6319 	}
6320 	if (pack_fds) {
6321 		const struct got_error *pack_err =
6322 		    got_repo_pack_fds_close(pack_fds);
6323 		if (error == NULL)
6324 			error = pack_err;
6325 	}
6326 	tog_free_refs();
6327 	return error;
6328 }
6329 
6330 static const struct got_error *
6331 draw_tree_entries(struct tog_view *view, const char *parent_path)
6332 {
6333 	struct tog_tree_view_state *s = &view->state.tree;
6334 	const struct got_error *err = NULL;
6335 	struct got_tree_entry *te;
6336 	wchar_t *wline;
6337 	struct tog_color *tc;
6338 	int width, n, nentries, i = 1;
6339 	int limit = view->nlines;
6340 
6341 	s->ndisplayed = 0;
6342 	if (view_is_hsplit_top(view))
6343 		--limit;  /* border */
6344 
6345 	werase(view->window);
6346 
6347 	if (limit == 0)
6348 		return NULL;
6349 
6350 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
6351 	    0, 0);
6352 	if (err)
6353 		return err;
6354 	if (view_needs_focus_indication(view))
6355 		wstandout(view->window);
6356 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6357 	if (tc)
6358 		wattr_on(view->window,
6359 		    COLOR_PAIR(tc->colorpair), NULL);
6360 	waddwstr(view->window, wline);
6361 	if (tc)
6362 		wattr_off(view->window,
6363 		    COLOR_PAIR(tc->colorpair), NULL);
6364 	if (view_needs_focus_indication(view))
6365 		wstandend(view->window);
6366 	free(wline);
6367 	wline = NULL;
6368 
6369 	i += s->selected;
6370 	if (s->first_displayed_entry) {
6371 		i += got_tree_entry_get_index(s->first_displayed_entry);
6372 		if (s->tree != s->root)
6373 			++i;  /* account for ".." entry */
6374 	}
6375 	nentries = got_object_tree_get_nentries(s->tree);
6376 	wprintw(view->window, " [%d/%d]", i,
6377 	    nentries + (s->tree == s->root ? 0 : 1));  /* ".." in !root tree */
6378 
6379 	if (width < view->ncols - 1)
6380 		waddch(view->window, '\n');
6381 	if (--limit <= 0)
6382 		return NULL;
6383 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
6384 	    0, 0);
6385 	if (err)
6386 		return err;
6387 	waddwstr(view->window, wline);
6388 	free(wline);
6389 	wline = NULL;
6390 	if (width < view->ncols - 1)
6391 		waddch(view->window, '\n');
6392 	if (--limit <= 0)
6393 		return NULL;
6394 	waddch(view->window, '\n');
6395 	if (--limit <= 0)
6396 		return NULL;
6397 
6398 	if (s->first_displayed_entry == NULL) {
6399 		te = got_object_tree_get_first_entry(s->tree);
6400 		if (s->selected == 0) {
6401 			if (view->focussed)
6402 				wstandout(view->window);
6403 			s->selected_entry = NULL;
6404 		}
6405 		waddstr(view->window, "  ..\n");	/* parent directory */
6406 		if (s->selected == 0 && view->focussed)
6407 			wstandend(view->window);
6408 		s->ndisplayed++;
6409 		if (--limit <= 0)
6410 			return NULL;
6411 		n = 1;
6412 	} else {
6413 		n = 0;
6414 		te = s->first_displayed_entry;
6415 	}
6416 
6417 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
6418 		char *line = NULL, *id_str = NULL, *link_target = NULL;
6419 		const char *modestr = "";
6420 		mode_t mode;
6421 
6422 		te = got_object_tree_get_entry(s->tree, i);
6423 		mode = got_tree_entry_get_mode(te);
6424 
6425 		if (s->show_ids) {
6426 			err = got_object_id_str(&id_str,
6427 			    got_tree_entry_get_id(te));
6428 			if (err)
6429 				return got_error_from_errno(
6430 				    "got_object_id_str");
6431 		}
6432 		if (got_object_tree_entry_is_submodule(te))
6433 			modestr = "$";
6434 		else if (S_ISLNK(mode)) {
6435 			int i;
6436 
6437 			err = got_tree_entry_get_symlink_target(&link_target,
6438 			    te, s->repo);
6439 			if (err) {
6440 				free(id_str);
6441 				return err;
6442 			}
6443 			for (i = 0; i < strlen(link_target); i++) {
6444 				if (!isprint((unsigned char)link_target[i]))
6445 					link_target[i] = '?';
6446 			}
6447 			modestr = "@";
6448 		}
6449 		else if (S_ISDIR(mode))
6450 			modestr = "/";
6451 		else if (mode & S_IXUSR)
6452 			modestr = "*";
6453 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
6454 		    got_tree_entry_get_name(te), modestr,
6455 		    link_target ? " -> ": "",
6456 		    link_target ? link_target : "") == -1) {
6457 			free(id_str);
6458 			free(link_target);
6459 			return got_error_from_errno("asprintf");
6460 		}
6461 		free(id_str);
6462 		free(link_target);
6463 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6464 		    0, 0);
6465 		if (err) {
6466 			free(line);
6467 			break;
6468 		}
6469 		if (n == s->selected) {
6470 			if (view->focussed)
6471 				wstandout(view->window);
6472 			s->selected_entry = te;
6473 		}
6474 		tc = match_color(&s->colors, line);
6475 		if (tc)
6476 			wattr_on(view->window,
6477 			    COLOR_PAIR(tc->colorpair), NULL);
6478 		waddwstr(view->window, wline);
6479 		if (tc)
6480 			wattr_off(view->window,
6481 			    COLOR_PAIR(tc->colorpair), NULL);
6482 		if (width < view->ncols - 1)
6483 			waddch(view->window, '\n');
6484 		if (n == s->selected && view->focussed)
6485 			wstandend(view->window);
6486 		free(line);
6487 		free(wline);
6488 		wline = NULL;
6489 		n++;
6490 		s->ndisplayed++;
6491 		s->last_displayed_entry = te;
6492 		if (--limit <= 0)
6493 			break;
6494 	}
6495 
6496 	return err;
6497 }
6498 
6499 static void
6500 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
6501 {
6502 	struct got_tree_entry *te;
6503 	int isroot = s->tree == s->root;
6504 	int i = 0;
6505 
6506 	if (s->first_displayed_entry == NULL)
6507 		return;
6508 
6509 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
6510 	while (i++ < maxscroll) {
6511 		if (te == NULL) {
6512 			if (!isroot)
6513 				s->first_displayed_entry = NULL;
6514 			break;
6515 		}
6516 		s->first_displayed_entry = te;
6517 		te = got_tree_entry_get_prev(s->tree, te);
6518 	}
6519 }
6520 
6521 static const struct got_error *
6522 tree_scroll_down(struct tog_view *view, int maxscroll)
6523 {
6524 	struct tog_tree_view_state *s = &view->state.tree;
6525 	struct got_tree_entry *next, *last;
6526 	int n = 0;
6527 
6528 	if (s->first_displayed_entry)
6529 		next = got_tree_entry_get_next(s->tree,
6530 		    s->first_displayed_entry);
6531 	else
6532 		next = got_object_tree_get_first_entry(s->tree);
6533 
6534 	last = s->last_displayed_entry;
6535 	while (next && n++ < maxscroll) {
6536 		if (last) {
6537 			s->last_displayed_entry = last;
6538 			last = got_tree_entry_get_next(s->tree, last);
6539 		}
6540 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
6541 			s->first_displayed_entry = next;
6542 			next = got_tree_entry_get_next(s->tree, next);
6543 		}
6544 	}
6545 
6546 	return NULL;
6547 }
6548 
6549 static const struct got_error *
6550 tree_entry_path(char **path, struct tog_parent_trees *parents,
6551     struct got_tree_entry *te)
6552 {
6553 	const struct got_error *err = NULL;
6554 	struct tog_parent_tree *pt;
6555 	size_t len = 2; /* for leading slash and NUL */
6556 
6557 	TAILQ_FOREACH(pt, parents, entry)
6558 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
6559 		    + 1 /* slash */;
6560 	if (te)
6561 		len += strlen(got_tree_entry_get_name(te));
6562 
6563 	*path = calloc(1, len);
6564 	if (path == NULL)
6565 		return got_error_from_errno("calloc");
6566 
6567 	(*path)[0] = '/';
6568 	pt = TAILQ_LAST(parents, tog_parent_trees);
6569 	while (pt) {
6570 		const char *name = got_tree_entry_get_name(pt->selected_entry);
6571 		if (strlcat(*path, name, len) >= len) {
6572 			err = got_error(GOT_ERR_NO_SPACE);
6573 			goto done;
6574 		}
6575 		if (strlcat(*path, "/", len) >= len) {
6576 			err = got_error(GOT_ERR_NO_SPACE);
6577 			goto done;
6578 		}
6579 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
6580 	}
6581 	if (te) {
6582 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
6583 			err = got_error(GOT_ERR_NO_SPACE);
6584 			goto done;
6585 		}
6586 	}
6587 done:
6588 	if (err) {
6589 		free(*path);
6590 		*path = NULL;
6591 	}
6592 	return err;
6593 }
6594 
6595 static const struct got_error *
6596 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6597     struct got_tree_entry *te, struct tog_parent_trees *parents,
6598     struct got_object_id *commit_id, struct got_repository *repo)
6599 {
6600 	const struct got_error *err = NULL;
6601 	char *path;
6602 	struct tog_view *blame_view;
6603 
6604 	*new_view = NULL;
6605 
6606 	err = tree_entry_path(&path, parents, te);
6607 	if (err)
6608 		return err;
6609 
6610 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
6611 	if (blame_view == NULL) {
6612 		err = got_error_from_errno("view_open");
6613 		goto done;
6614 	}
6615 
6616 	err = open_blame_view(blame_view, path, commit_id, repo);
6617 	if (err) {
6618 		if (err->code == GOT_ERR_CANCELLED)
6619 			err = NULL;
6620 		view_close(blame_view);
6621 	} else
6622 		*new_view = blame_view;
6623 done:
6624 	free(path);
6625 	return err;
6626 }
6627 
6628 static const struct got_error *
6629 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6630     struct tog_tree_view_state *s)
6631 {
6632 	struct tog_view *log_view;
6633 	const struct got_error *err = NULL;
6634 	char *path;
6635 
6636 	*new_view = NULL;
6637 
6638 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6639 	if (log_view == NULL)
6640 		return got_error_from_errno("view_open");
6641 
6642 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
6643 	if (err)
6644 		return err;
6645 
6646 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
6647 	    path, 0);
6648 	if (err)
6649 		view_close(log_view);
6650 	else
6651 		*new_view = log_view;
6652 	free(path);
6653 	return err;
6654 }
6655 
6656 static const struct got_error *
6657 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
6658     const char *head_ref_name, struct got_repository *repo)
6659 {
6660 	const struct got_error *err = NULL;
6661 	char *commit_id_str = NULL;
6662 	struct tog_tree_view_state *s = &view->state.tree;
6663 	struct got_commit_object *commit = NULL;
6664 
6665 	TAILQ_INIT(&s->parents);
6666 	STAILQ_INIT(&s->colors);
6667 
6668 	s->commit_id = got_object_id_dup(commit_id);
6669 	if (s->commit_id == NULL)
6670 		return got_error_from_errno("got_object_id_dup");
6671 
6672 	err = got_object_open_as_commit(&commit, repo, commit_id);
6673 	if (err)
6674 		goto done;
6675 
6676 	/*
6677 	 * The root is opened here and will be closed when the view is closed.
6678 	 * Any visited subtrees and their path-wise parents are opened and
6679 	 * closed on demand.
6680 	 */
6681 	err = got_object_open_as_tree(&s->root, repo,
6682 	    got_object_commit_get_tree_id(commit));
6683 	if (err)
6684 		goto done;
6685 	s->tree = s->root;
6686 
6687 	err = got_object_id_str(&commit_id_str, commit_id);
6688 	if (err != NULL)
6689 		goto done;
6690 
6691 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
6692 		err = got_error_from_errno("asprintf");
6693 		goto done;
6694 	}
6695 
6696 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
6697 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
6698 	if (head_ref_name) {
6699 		s->head_ref_name = strdup(head_ref_name);
6700 		if (s->head_ref_name == NULL) {
6701 			err = got_error_from_errno("strdup");
6702 			goto done;
6703 		}
6704 	}
6705 	s->repo = repo;
6706 
6707 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6708 		err = add_color(&s->colors, "\\$$",
6709 		    TOG_COLOR_TREE_SUBMODULE,
6710 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
6711 		if (err)
6712 			goto done;
6713 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
6714 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
6715 		if (err)
6716 			goto done;
6717 		err = add_color(&s->colors, "/$",
6718 		    TOG_COLOR_TREE_DIRECTORY,
6719 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
6720 		if (err)
6721 			goto done;
6722 
6723 		err = add_color(&s->colors, "\\*$",
6724 		    TOG_COLOR_TREE_EXECUTABLE,
6725 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
6726 		if (err)
6727 			goto done;
6728 
6729 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
6730 		    get_color_value("TOG_COLOR_COMMIT"));
6731 		if (err)
6732 			goto done;
6733 	}
6734 
6735 	view->show = show_tree_view;
6736 	view->input = input_tree_view;
6737 	view->close = close_tree_view;
6738 	view->search_start = search_start_tree_view;
6739 	view->search_next = search_next_tree_view;
6740 done:
6741 	free(commit_id_str);
6742 	if (commit)
6743 		got_object_commit_close(commit);
6744 	if (err)
6745 		close_tree_view(view);
6746 	return err;
6747 }
6748 
6749 static const struct got_error *
6750 close_tree_view(struct tog_view *view)
6751 {
6752 	struct tog_tree_view_state *s = &view->state.tree;
6753 
6754 	free_colors(&s->colors);
6755 	free(s->tree_label);
6756 	s->tree_label = NULL;
6757 	free(s->commit_id);
6758 	s->commit_id = NULL;
6759 	free(s->head_ref_name);
6760 	s->head_ref_name = NULL;
6761 	while (!TAILQ_EMPTY(&s->parents)) {
6762 		struct tog_parent_tree *parent;
6763 		parent = TAILQ_FIRST(&s->parents);
6764 		TAILQ_REMOVE(&s->parents, parent, entry);
6765 		if (parent->tree != s->root)
6766 			got_object_tree_close(parent->tree);
6767 		free(parent);
6768 
6769 	}
6770 	if (s->tree != NULL && s->tree != s->root)
6771 		got_object_tree_close(s->tree);
6772 	if (s->root)
6773 		got_object_tree_close(s->root);
6774 	return NULL;
6775 }
6776 
6777 static const struct got_error *
6778 search_start_tree_view(struct tog_view *view)
6779 {
6780 	struct tog_tree_view_state *s = &view->state.tree;
6781 
6782 	s->matched_entry = NULL;
6783 	return NULL;
6784 }
6785 
6786 static int
6787 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
6788 {
6789 	regmatch_t regmatch;
6790 
6791 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
6792 	    0) == 0;
6793 }
6794 
6795 static const struct got_error *
6796 search_next_tree_view(struct tog_view *view)
6797 {
6798 	struct tog_tree_view_state *s = &view->state.tree;
6799 	struct got_tree_entry *te = NULL;
6800 
6801 	if (!view->searching) {
6802 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6803 		return NULL;
6804 	}
6805 
6806 	if (s->matched_entry) {
6807 		if (view->searching == TOG_SEARCH_FORWARD) {
6808 			if (s->selected_entry)
6809 				te = got_tree_entry_get_next(s->tree,
6810 				    s->selected_entry);
6811 			else
6812 				te = got_object_tree_get_first_entry(s->tree);
6813 		} else {
6814 			if (s->selected_entry == NULL)
6815 				te = got_object_tree_get_last_entry(s->tree);
6816 			else
6817 				te = got_tree_entry_get_prev(s->tree,
6818 				    s->selected_entry);
6819 		}
6820 	} else {
6821 		if (s->selected_entry)
6822 			te = s->selected_entry;
6823 		else if (view->searching == TOG_SEARCH_FORWARD)
6824 			te = got_object_tree_get_first_entry(s->tree);
6825 		else
6826 			te = got_object_tree_get_last_entry(s->tree);
6827 	}
6828 
6829 	while (1) {
6830 		if (te == NULL) {
6831 			if (s->matched_entry == NULL) {
6832 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6833 				return NULL;
6834 			}
6835 			if (view->searching == TOG_SEARCH_FORWARD)
6836 				te = got_object_tree_get_first_entry(s->tree);
6837 			else
6838 				te = got_object_tree_get_last_entry(s->tree);
6839 		}
6840 
6841 		if (match_tree_entry(te, &view->regex)) {
6842 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6843 			s->matched_entry = te;
6844 			break;
6845 		}
6846 
6847 		if (view->searching == TOG_SEARCH_FORWARD)
6848 			te = got_tree_entry_get_next(s->tree, te);
6849 		else
6850 			te = got_tree_entry_get_prev(s->tree, te);
6851 	}
6852 
6853 	if (s->matched_entry) {
6854 		s->first_displayed_entry = s->matched_entry;
6855 		s->selected = 0;
6856 	}
6857 
6858 	return NULL;
6859 }
6860 
6861 static const struct got_error *
6862 show_tree_view(struct tog_view *view)
6863 {
6864 	const struct got_error *err = NULL;
6865 	struct tog_tree_view_state *s = &view->state.tree;
6866 	char *parent_path;
6867 
6868 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6869 	if (err)
6870 		return err;
6871 
6872 	err = draw_tree_entries(view, parent_path);
6873 	free(parent_path);
6874 
6875 	view_border(view);
6876 	return err;
6877 }
6878 
6879 static const struct got_error *
6880 tree_goto_line(struct tog_view *view, int nlines)
6881 {
6882 	const struct got_error		 *err = NULL;
6883 	struct tog_tree_view_state	 *s = &view->state.tree;
6884 	struct got_tree_entry		**fte, **lte, **ste;
6885 	int				  g, last, first = 1, i = 1;
6886 	int				  root = s->tree == s->root;
6887 	int				  off = root ? 1 : 2;
6888 
6889 	g = view->gline;
6890 	view->gline = 0;
6891 
6892 	if (g == 0)
6893 		g = 1;
6894 	else if (g > got_object_tree_get_nentries(s->tree))
6895 		g = got_object_tree_get_nentries(s->tree) + (root ? 0 : 1);
6896 
6897 	fte = &s->first_displayed_entry;
6898 	lte = &s->last_displayed_entry;
6899 	ste = &s->selected_entry;
6900 
6901 	if (*fte != NULL) {
6902 		first = got_tree_entry_get_index(*fte);
6903 		first += off;  /* account for ".." */
6904 	}
6905 	last = got_tree_entry_get_index(*lte);
6906 	last += off;
6907 
6908 	if (g >= first && g <= last && g - first < nlines) {
6909 		s->selected = g - first;
6910 		return NULL;	/* gline is on the current page */
6911 	}
6912 
6913 	if (*ste != NULL) {
6914 		i = got_tree_entry_get_index(*ste);
6915 		i += off;
6916 	}
6917 
6918 	if (i < g) {
6919 		err = tree_scroll_down(view, g - i);
6920 		if (err)
6921 			return err;
6922 		if (got_tree_entry_get_index(*lte) >=
6923 		    got_object_tree_get_nentries(s->tree) - 1 &&
6924 		    first + s->selected < g &&
6925 		    s->selected < s->ndisplayed - 1) {
6926 			first = got_tree_entry_get_index(*fte);
6927 			first += off;
6928 			s->selected = g - first;
6929 		}
6930 	} else if (i > g)
6931 		tree_scroll_up(s, i - g);
6932 
6933 	if (g < nlines &&
6934 	    (*fte == NULL || (root && !got_tree_entry_get_index(*fte))))
6935 		s->selected = g - 1;
6936 
6937 	return NULL;
6938 }
6939 
6940 static const struct got_error *
6941 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6942 {
6943 	const struct got_error *err = NULL;
6944 	struct tog_tree_view_state *s = &view->state.tree;
6945 	struct got_tree_entry *te;
6946 	int n, nscroll = view->nlines - 3;
6947 
6948 	if (view->gline)
6949 		return tree_goto_line(view, nscroll);
6950 
6951 	switch (ch) {
6952 	case 'i':
6953 		s->show_ids = !s->show_ids;
6954 		view->count = 0;
6955 		break;
6956 	case 'L':
6957 		view->count = 0;
6958 		if (!s->selected_entry)
6959 			break;
6960 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
6961 		break;
6962 	case 'R':
6963 		view->count = 0;
6964 		err = view_request_new(new_view, view, TOG_VIEW_REF);
6965 		break;
6966 	case 'g':
6967 	case KEY_HOME:
6968 		s->selected = 0;
6969 		view->count = 0;
6970 		if (s->tree == s->root)
6971 			s->first_displayed_entry =
6972 			    got_object_tree_get_first_entry(s->tree);
6973 		else
6974 			s->first_displayed_entry = NULL;
6975 		break;
6976 	case 'G':
6977 	case KEY_END: {
6978 		int eos = view->nlines - 3;
6979 
6980 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
6981 			--eos;  /* border */
6982 		s->selected = 0;
6983 		view->count = 0;
6984 		te = got_object_tree_get_last_entry(s->tree);
6985 		for (n = 0; n < eos; n++) {
6986 			if (te == NULL) {
6987 				if (s->tree != s->root) {
6988 					s->first_displayed_entry = NULL;
6989 					n++;
6990 				}
6991 				break;
6992 			}
6993 			s->first_displayed_entry = te;
6994 			te = got_tree_entry_get_prev(s->tree, te);
6995 		}
6996 		if (n > 0)
6997 			s->selected = n - 1;
6998 		break;
6999 	}
7000 	case 'k':
7001 	case KEY_UP:
7002 	case CTRL('p'):
7003 		if (s->selected > 0) {
7004 			s->selected--;
7005 			break;
7006 		}
7007 		tree_scroll_up(s, 1);
7008 		if (s->selected_entry == NULL ||
7009 		    (s->tree == s->root && s->selected_entry ==
7010 		     got_object_tree_get_first_entry(s->tree)))
7011 			view->count = 0;
7012 		break;
7013 	case CTRL('u'):
7014 	case 'u':
7015 		nscroll /= 2;
7016 		/* FALL THROUGH */
7017 	case KEY_PPAGE:
7018 	case CTRL('b'):
7019 	case 'b':
7020 		if (s->tree == s->root) {
7021 			if (got_object_tree_get_first_entry(s->tree) ==
7022 			    s->first_displayed_entry)
7023 				s->selected -= MIN(s->selected, nscroll);
7024 		} else {
7025 			if (s->first_displayed_entry == NULL)
7026 				s->selected -= MIN(s->selected, nscroll);
7027 		}
7028 		tree_scroll_up(s, MAX(0, nscroll));
7029 		if (s->selected_entry == NULL ||
7030 		    (s->tree == s->root && s->selected_entry ==
7031 		     got_object_tree_get_first_entry(s->tree)))
7032 			view->count = 0;
7033 		break;
7034 	case 'j':
7035 	case KEY_DOWN:
7036 	case CTRL('n'):
7037 		if (s->selected < s->ndisplayed - 1) {
7038 			s->selected++;
7039 			break;
7040 		}
7041 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7042 		    == NULL) {
7043 			/* can't scroll any further */
7044 			view->count = 0;
7045 			break;
7046 		}
7047 		tree_scroll_down(view, 1);
7048 		break;
7049 	case CTRL('d'):
7050 	case 'd':
7051 		nscroll /= 2;
7052 		/* FALL THROUGH */
7053 	case KEY_NPAGE:
7054 	case CTRL('f'):
7055 	case 'f':
7056 	case ' ':
7057 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7058 		    == NULL) {
7059 			/* can't scroll any further; move cursor down */
7060 			if (s->selected < s->ndisplayed - 1)
7061 				s->selected += MIN(nscroll,
7062 				    s->ndisplayed - s->selected - 1);
7063 			else
7064 				view->count = 0;
7065 			break;
7066 		}
7067 		tree_scroll_down(view, nscroll);
7068 		break;
7069 	case KEY_ENTER:
7070 	case '\r':
7071 	case KEY_BACKSPACE:
7072 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
7073 			struct tog_parent_tree *parent;
7074 			/* user selected '..' */
7075 			if (s->tree == s->root) {
7076 				view->count = 0;
7077 				break;
7078 			}
7079 			parent = TAILQ_FIRST(&s->parents);
7080 			TAILQ_REMOVE(&s->parents, parent,
7081 			    entry);
7082 			got_object_tree_close(s->tree);
7083 			s->tree = parent->tree;
7084 			s->first_displayed_entry =
7085 			    parent->first_displayed_entry;
7086 			s->selected_entry =
7087 			    parent->selected_entry;
7088 			s->selected = parent->selected;
7089 			if (s->selected > view->nlines - 3) {
7090 				err = offset_selection_down(view);
7091 				if (err)
7092 					break;
7093 			}
7094 			free(parent);
7095 		} else if (S_ISDIR(got_tree_entry_get_mode(
7096 		    s->selected_entry))) {
7097 			struct got_tree_object *subtree;
7098 			view->count = 0;
7099 			err = got_object_open_as_tree(&subtree, s->repo,
7100 			    got_tree_entry_get_id(s->selected_entry));
7101 			if (err)
7102 				break;
7103 			err = tree_view_visit_subtree(s, subtree);
7104 			if (err) {
7105 				got_object_tree_close(subtree);
7106 				break;
7107 			}
7108 		} else if (S_ISREG(got_tree_entry_get_mode(s->selected_entry)))
7109 			err = view_request_new(new_view, view, TOG_VIEW_BLAME);
7110 		break;
7111 	case KEY_RESIZE:
7112 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
7113 			s->selected = view->nlines - 4;
7114 		view->count = 0;
7115 		break;
7116 	default:
7117 		view->count = 0;
7118 		break;
7119 	}
7120 
7121 	return err;
7122 }
7123 
7124 __dead static void
7125 usage_tree(void)
7126 {
7127 	endwin();
7128 	fprintf(stderr,
7129 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
7130 	    getprogname());
7131 	exit(1);
7132 }
7133 
7134 static const struct got_error *
7135 cmd_tree(int argc, char *argv[])
7136 {
7137 	const struct got_error *error;
7138 	struct got_repository *repo = NULL;
7139 	struct got_worktree *worktree = NULL;
7140 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7141 	struct got_object_id *commit_id = NULL;
7142 	struct got_commit_object *commit = NULL;
7143 	const char *commit_id_arg = NULL;
7144 	char *label = NULL;
7145 	struct got_reference *ref = NULL;
7146 	const char *head_ref_name = NULL;
7147 	int ch;
7148 	struct tog_view *view;
7149 	int *pack_fds = NULL;
7150 
7151 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7152 		switch (ch) {
7153 		case 'c':
7154 			commit_id_arg = optarg;
7155 			break;
7156 		case 'r':
7157 			repo_path = realpath(optarg, NULL);
7158 			if (repo_path == NULL)
7159 				return got_error_from_errno2("realpath",
7160 				    optarg);
7161 			break;
7162 		default:
7163 			usage_tree();
7164 			/* NOTREACHED */
7165 		}
7166 	}
7167 
7168 	argc -= optind;
7169 	argv += optind;
7170 
7171 	if (argc > 1)
7172 		usage_tree();
7173 
7174 	error = got_repo_pack_fds_open(&pack_fds);
7175 	if (error != NULL)
7176 		goto done;
7177 
7178 	if (repo_path == NULL) {
7179 		cwd = getcwd(NULL, 0);
7180 		if (cwd == NULL)
7181 			return got_error_from_errno("getcwd");
7182 		error = got_worktree_open(&worktree, cwd);
7183 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7184 			goto done;
7185 		if (worktree)
7186 			repo_path =
7187 			    strdup(got_worktree_get_repo_path(worktree));
7188 		else
7189 			repo_path = strdup(cwd);
7190 		if (repo_path == NULL) {
7191 			error = got_error_from_errno("strdup");
7192 			goto done;
7193 		}
7194 	}
7195 
7196 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7197 	if (error != NULL)
7198 		goto done;
7199 
7200 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7201 	    repo, worktree);
7202 	if (error)
7203 		goto done;
7204 
7205 	init_curses();
7206 
7207 	error = apply_unveil(got_repo_get_path(repo), NULL);
7208 	if (error)
7209 		goto done;
7210 
7211 	error = tog_load_refs(repo, 0);
7212 	if (error)
7213 		goto done;
7214 
7215 	if (commit_id_arg == NULL) {
7216 		error = got_repo_match_object_id(&commit_id, &label,
7217 		    worktree ? got_worktree_get_head_ref_name(worktree) :
7218 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7219 		if (error)
7220 			goto done;
7221 		head_ref_name = label;
7222 	} else {
7223 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
7224 		if (error == NULL)
7225 			head_ref_name = got_ref_get_name(ref);
7226 		else if (error->code != GOT_ERR_NOT_REF)
7227 			goto done;
7228 		error = got_repo_match_object_id(&commit_id, NULL,
7229 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7230 		if (error)
7231 			goto done;
7232 	}
7233 
7234 	error = got_object_open_as_commit(&commit, repo, commit_id);
7235 	if (error)
7236 		goto done;
7237 
7238 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
7239 	if (view == NULL) {
7240 		error = got_error_from_errno("view_open");
7241 		goto done;
7242 	}
7243 	error = open_tree_view(view, commit_id, head_ref_name, repo);
7244 	if (error)
7245 		goto done;
7246 	if (!got_path_is_root_dir(in_repo_path)) {
7247 		error = tree_view_walk_path(&view->state.tree, commit,
7248 		    in_repo_path);
7249 		if (error)
7250 			goto done;
7251 	}
7252 
7253 	if (worktree) {
7254 		/* Release work tree lock. */
7255 		got_worktree_close(worktree);
7256 		worktree = NULL;
7257 	}
7258 	error = view_loop(view);
7259 done:
7260 	free(repo_path);
7261 	free(cwd);
7262 	free(commit_id);
7263 	free(label);
7264 	if (ref)
7265 		got_ref_close(ref);
7266 	if (repo) {
7267 		const struct got_error *close_err = got_repo_close(repo);
7268 		if (error == NULL)
7269 			error = close_err;
7270 	}
7271 	if (pack_fds) {
7272 		const struct got_error *pack_err =
7273 		    got_repo_pack_fds_close(pack_fds);
7274 		if (error == NULL)
7275 			error = pack_err;
7276 	}
7277 	tog_free_refs();
7278 	return error;
7279 }
7280 
7281 static const struct got_error *
7282 ref_view_load_refs(struct tog_ref_view_state *s)
7283 {
7284 	struct got_reflist_entry *sre;
7285 	struct tog_reflist_entry *re;
7286 
7287 	s->nrefs = 0;
7288 	TAILQ_FOREACH(sre, &tog_refs, entry) {
7289 		if (strncmp(got_ref_get_name(sre->ref),
7290 		    "refs/got/", 9) == 0 &&
7291 		    strncmp(got_ref_get_name(sre->ref),
7292 		    "refs/got/backup/", 16) != 0)
7293 			continue;
7294 
7295 		re = malloc(sizeof(*re));
7296 		if (re == NULL)
7297 			return got_error_from_errno("malloc");
7298 
7299 		re->ref = got_ref_dup(sre->ref);
7300 		if (re->ref == NULL)
7301 			return got_error_from_errno("got_ref_dup");
7302 		re->idx = s->nrefs++;
7303 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
7304 	}
7305 
7306 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7307 	return NULL;
7308 }
7309 
7310 static void
7311 ref_view_free_refs(struct tog_ref_view_state *s)
7312 {
7313 	struct tog_reflist_entry *re;
7314 
7315 	while (!TAILQ_EMPTY(&s->refs)) {
7316 		re = TAILQ_FIRST(&s->refs);
7317 		TAILQ_REMOVE(&s->refs, re, entry);
7318 		got_ref_close(re->ref);
7319 		free(re);
7320 	}
7321 }
7322 
7323 static const struct got_error *
7324 open_ref_view(struct tog_view *view, struct got_repository *repo)
7325 {
7326 	const struct got_error *err = NULL;
7327 	struct tog_ref_view_state *s = &view->state.ref;
7328 
7329 	s->selected_entry = 0;
7330 	s->repo = repo;
7331 
7332 	TAILQ_INIT(&s->refs);
7333 	STAILQ_INIT(&s->colors);
7334 
7335 	err = ref_view_load_refs(s);
7336 	if (err)
7337 		return err;
7338 
7339 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7340 		err = add_color(&s->colors, "^refs/heads/",
7341 		    TOG_COLOR_REFS_HEADS,
7342 		    get_color_value("TOG_COLOR_REFS_HEADS"));
7343 		if (err)
7344 			goto done;
7345 
7346 		err = add_color(&s->colors, "^refs/tags/",
7347 		    TOG_COLOR_REFS_TAGS,
7348 		    get_color_value("TOG_COLOR_REFS_TAGS"));
7349 		if (err)
7350 			goto done;
7351 
7352 		err = add_color(&s->colors, "^refs/remotes/",
7353 		    TOG_COLOR_REFS_REMOTES,
7354 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
7355 		if (err)
7356 			goto done;
7357 
7358 		err = add_color(&s->colors, "^refs/got/backup/",
7359 		    TOG_COLOR_REFS_BACKUP,
7360 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
7361 		if (err)
7362 			goto done;
7363 	}
7364 
7365 	view->show = show_ref_view;
7366 	view->input = input_ref_view;
7367 	view->close = close_ref_view;
7368 	view->search_start = search_start_ref_view;
7369 	view->search_next = search_next_ref_view;
7370 done:
7371 	if (err)
7372 		free_colors(&s->colors);
7373 	return err;
7374 }
7375 
7376 static const struct got_error *
7377 close_ref_view(struct tog_view *view)
7378 {
7379 	struct tog_ref_view_state *s = &view->state.ref;
7380 
7381 	ref_view_free_refs(s);
7382 	free_colors(&s->colors);
7383 
7384 	return NULL;
7385 }
7386 
7387 static const struct got_error *
7388 resolve_reflist_entry(struct got_object_id **commit_id,
7389     struct tog_reflist_entry *re, struct got_repository *repo)
7390 {
7391 	const struct got_error *err = NULL;
7392 	struct got_object_id *obj_id;
7393 	struct got_tag_object *tag = NULL;
7394 	int obj_type;
7395 
7396 	*commit_id = NULL;
7397 
7398 	err = got_ref_resolve(&obj_id, repo, re->ref);
7399 	if (err)
7400 		return err;
7401 
7402 	err = got_object_get_type(&obj_type, repo, obj_id);
7403 	if (err)
7404 		goto done;
7405 
7406 	switch (obj_type) {
7407 	case GOT_OBJ_TYPE_COMMIT:
7408 		*commit_id = obj_id;
7409 		break;
7410 	case GOT_OBJ_TYPE_TAG:
7411 		err = got_object_open_as_tag(&tag, repo, obj_id);
7412 		if (err)
7413 			goto done;
7414 		free(obj_id);
7415 		err = got_object_get_type(&obj_type, repo,
7416 		    got_object_tag_get_object_id(tag));
7417 		if (err)
7418 			goto done;
7419 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
7420 			err = got_error(GOT_ERR_OBJ_TYPE);
7421 			goto done;
7422 		}
7423 		*commit_id = got_object_id_dup(
7424 		    got_object_tag_get_object_id(tag));
7425 		if (*commit_id == NULL) {
7426 			err = got_error_from_errno("got_object_id_dup");
7427 			goto done;
7428 		}
7429 		break;
7430 	default:
7431 		err = got_error(GOT_ERR_OBJ_TYPE);
7432 		break;
7433 	}
7434 
7435 done:
7436 	if (tag)
7437 		got_object_tag_close(tag);
7438 	if (err) {
7439 		free(*commit_id);
7440 		*commit_id = NULL;
7441 	}
7442 	return err;
7443 }
7444 
7445 static const struct got_error *
7446 log_ref_entry(struct tog_view **new_view, int begin_y, int begin_x,
7447     struct tog_reflist_entry *re, struct got_repository *repo)
7448 {
7449 	struct tog_view *log_view;
7450 	const struct got_error *err = NULL;
7451 	struct got_object_id *commit_id = NULL;
7452 
7453 	*new_view = NULL;
7454 
7455 	err = resolve_reflist_entry(&commit_id, re, repo);
7456 	if (err) {
7457 		if (err->code != GOT_ERR_OBJ_TYPE)
7458 			return err;
7459 		else
7460 			return NULL;
7461 	}
7462 
7463 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7464 	if (log_view == NULL) {
7465 		err = got_error_from_errno("view_open");
7466 		goto done;
7467 	}
7468 
7469 	err = open_log_view(log_view, commit_id, repo,
7470 	    got_ref_get_name(re->ref), "", 0);
7471 done:
7472 	if (err)
7473 		view_close(log_view);
7474 	else
7475 		*new_view = log_view;
7476 	free(commit_id);
7477 	return err;
7478 }
7479 
7480 static void
7481 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
7482 {
7483 	struct tog_reflist_entry *re;
7484 	int i = 0;
7485 
7486 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7487 		return;
7488 
7489 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
7490 	while (i++ < maxscroll) {
7491 		if (re == NULL)
7492 			break;
7493 		s->first_displayed_entry = re;
7494 		re = TAILQ_PREV(re, tog_reflist_head, entry);
7495 	}
7496 }
7497 
7498 static const struct got_error *
7499 ref_scroll_down(struct tog_view *view, int maxscroll)
7500 {
7501 	struct tog_ref_view_state *s = &view->state.ref;
7502 	struct tog_reflist_entry *next, *last;
7503 	int n = 0;
7504 
7505 	if (s->first_displayed_entry)
7506 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
7507 	else
7508 		next = TAILQ_FIRST(&s->refs);
7509 
7510 	last = s->last_displayed_entry;
7511 	while (next && n++ < maxscroll) {
7512 		if (last) {
7513 			s->last_displayed_entry = last;
7514 			last = TAILQ_NEXT(last, entry);
7515 		}
7516 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN)) {
7517 			s->first_displayed_entry = next;
7518 			next = TAILQ_NEXT(next, entry);
7519 		}
7520 	}
7521 
7522 	return NULL;
7523 }
7524 
7525 static const struct got_error *
7526 search_start_ref_view(struct tog_view *view)
7527 {
7528 	struct tog_ref_view_state *s = &view->state.ref;
7529 
7530 	s->matched_entry = NULL;
7531 	return NULL;
7532 }
7533 
7534 static int
7535 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
7536 {
7537 	regmatch_t regmatch;
7538 
7539 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
7540 	    0) == 0;
7541 }
7542 
7543 static const struct got_error *
7544 search_next_ref_view(struct tog_view *view)
7545 {
7546 	struct tog_ref_view_state *s = &view->state.ref;
7547 	struct tog_reflist_entry *re = NULL;
7548 
7549 	if (!view->searching) {
7550 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7551 		return NULL;
7552 	}
7553 
7554 	if (s->matched_entry) {
7555 		if (view->searching == TOG_SEARCH_FORWARD) {
7556 			if (s->selected_entry)
7557 				re = TAILQ_NEXT(s->selected_entry, entry);
7558 			else
7559 				re = TAILQ_PREV(s->selected_entry,
7560 				    tog_reflist_head, entry);
7561 		} else {
7562 			if (s->selected_entry == NULL)
7563 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7564 			else
7565 				re = TAILQ_PREV(s->selected_entry,
7566 				    tog_reflist_head, entry);
7567 		}
7568 	} else {
7569 		if (s->selected_entry)
7570 			re = s->selected_entry;
7571 		else if (view->searching == TOG_SEARCH_FORWARD)
7572 			re = TAILQ_FIRST(&s->refs);
7573 		else
7574 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
7575 	}
7576 
7577 	while (1) {
7578 		if (re == NULL) {
7579 			if (s->matched_entry == NULL) {
7580 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7581 				return NULL;
7582 			}
7583 			if (view->searching == TOG_SEARCH_FORWARD)
7584 				re = TAILQ_FIRST(&s->refs);
7585 			else
7586 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7587 		}
7588 
7589 		if (match_reflist_entry(re, &view->regex)) {
7590 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7591 			s->matched_entry = re;
7592 			break;
7593 		}
7594 
7595 		if (view->searching == TOG_SEARCH_FORWARD)
7596 			re = TAILQ_NEXT(re, entry);
7597 		else
7598 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7599 	}
7600 
7601 	if (s->matched_entry) {
7602 		s->first_displayed_entry = s->matched_entry;
7603 		s->selected = 0;
7604 	}
7605 
7606 	return NULL;
7607 }
7608 
7609 static const struct got_error *
7610 show_ref_view(struct tog_view *view)
7611 {
7612 	const struct got_error *err = NULL;
7613 	struct tog_ref_view_state *s = &view->state.ref;
7614 	struct tog_reflist_entry *re;
7615 	char *line = NULL;
7616 	wchar_t *wline;
7617 	struct tog_color *tc;
7618 	int width, n;
7619 	int limit = view->nlines;
7620 
7621 	werase(view->window);
7622 
7623 	s->ndisplayed = 0;
7624 	if (view_is_hsplit_top(view))
7625 		--limit;  /* border */
7626 
7627 	if (limit == 0)
7628 		return NULL;
7629 
7630 	re = s->first_displayed_entry;
7631 
7632 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
7633 	    s->nrefs) == -1)
7634 		return got_error_from_errno("asprintf");
7635 
7636 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
7637 	if (err) {
7638 		free(line);
7639 		return err;
7640 	}
7641 	if (view_needs_focus_indication(view))
7642 		wstandout(view->window);
7643 	waddwstr(view->window, wline);
7644 	if (view_needs_focus_indication(view))
7645 		wstandend(view->window);
7646 	free(wline);
7647 	wline = NULL;
7648 	free(line);
7649 	line = NULL;
7650 	if (width < view->ncols - 1)
7651 		waddch(view->window, '\n');
7652 	if (--limit <= 0)
7653 		return NULL;
7654 
7655 	n = 0;
7656 	while (re && limit > 0) {
7657 		char *line = NULL;
7658 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
7659 
7660 		if (s->show_date) {
7661 			struct got_commit_object *ci;
7662 			struct got_tag_object *tag;
7663 			struct got_object_id *id;
7664 			struct tm tm;
7665 			time_t t;
7666 
7667 			err = got_ref_resolve(&id, s->repo, re->ref);
7668 			if (err)
7669 				return err;
7670 			err = got_object_open_as_tag(&tag, s->repo, id);
7671 			if (err) {
7672 				if (err->code != GOT_ERR_OBJ_TYPE) {
7673 					free(id);
7674 					return err;
7675 				}
7676 				err = got_object_open_as_commit(&ci, s->repo,
7677 				    id);
7678 				if (err) {
7679 					free(id);
7680 					return err;
7681 				}
7682 				t = got_object_commit_get_committer_time(ci);
7683 				got_object_commit_close(ci);
7684 			} else {
7685 				t = got_object_tag_get_tagger_time(tag);
7686 				got_object_tag_close(tag);
7687 			}
7688 			free(id);
7689 			if (gmtime_r(&t, &tm) == NULL)
7690 				return got_error_from_errno("gmtime_r");
7691 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
7692 				return got_error(GOT_ERR_NO_SPACE);
7693 		}
7694 		if (got_ref_is_symbolic(re->ref)) {
7695 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
7696 			    ymd : "", got_ref_get_name(re->ref),
7697 			    got_ref_get_symref_target(re->ref)) == -1)
7698 				return got_error_from_errno("asprintf");
7699 		} else if (s->show_ids) {
7700 			struct got_object_id *id;
7701 			char *id_str;
7702 			err = got_ref_resolve(&id, s->repo, re->ref);
7703 			if (err)
7704 				return err;
7705 			err = got_object_id_str(&id_str, id);
7706 			if (err) {
7707 				free(id);
7708 				return err;
7709 			}
7710 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
7711 			    got_ref_get_name(re->ref), id_str) == -1) {
7712 				err = got_error_from_errno("asprintf");
7713 				free(id);
7714 				free(id_str);
7715 				return err;
7716 			}
7717 			free(id);
7718 			free(id_str);
7719 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
7720 		    got_ref_get_name(re->ref)) == -1)
7721 			return got_error_from_errno("asprintf");
7722 
7723 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
7724 		    0, 0);
7725 		if (err) {
7726 			free(line);
7727 			return err;
7728 		}
7729 		if (n == s->selected) {
7730 			if (view->focussed)
7731 				wstandout(view->window);
7732 			s->selected_entry = re;
7733 		}
7734 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
7735 		if (tc)
7736 			wattr_on(view->window,
7737 			    COLOR_PAIR(tc->colorpair), NULL);
7738 		waddwstr(view->window, wline);
7739 		if (tc)
7740 			wattr_off(view->window,
7741 			    COLOR_PAIR(tc->colorpair), NULL);
7742 		if (width < view->ncols - 1)
7743 			waddch(view->window, '\n');
7744 		if (n == s->selected && view->focussed)
7745 			wstandend(view->window);
7746 		free(line);
7747 		free(wline);
7748 		wline = NULL;
7749 		n++;
7750 		s->ndisplayed++;
7751 		s->last_displayed_entry = re;
7752 
7753 		limit--;
7754 		re = TAILQ_NEXT(re, entry);
7755 	}
7756 
7757 	view_border(view);
7758 	return err;
7759 }
7760 
7761 static const struct got_error *
7762 browse_ref_tree(struct tog_view **new_view, int begin_y, int begin_x,
7763     struct tog_reflist_entry *re, struct got_repository *repo)
7764 {
7765 	const struct got_error *err = NULL;
7766 	struct got_object_id *commit_id = NULL;
7767 	struct tog_view *tree_view;
7768 
7769 	*new_view = NULL;
7770 
7771 	err = resolve_reflist_entry(&commit_id, re, repo);
7772 	if (err) {
7773 		if (err->code != GOT_ERR_OBJ_TYPE)
7774 			return err;
7775 		else
7776 			return NULL;
7777 	}
7778 
7779 
7780 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
7781 	if (tree_view == NULL) {
7782 		err = got_error_from_errno("view_open");
7783 		goto done;
7784 	}
7785 
7786 	err = open_tree_view(tree_view, commit_id,
7787 	    got_ref_get_name(re->ref), repo);
7788 	if (err)
7789 		goto done;
7790 
7791 	*new_view = tree_view;
7792 done:
7793 	free(commit_id);
7794 	return err;
7795 }
7796 
7797 static const struct got_error *
7798 ref_goto_line(struct tog_view *view, int nlines)
7799 {
7800 	const struct got_error		*err = NULL;
7801 	struct tog_ref_view_state	*s = &view->state.ref;
7802 	int				 g, idx = s->selected_entry->idx;
7803 
7804 	g = view->gline;
7805 	view->gline = 0;
7806 
7807 	if (g == 0)
7808 		g = 1;
7809 	else if (g > s->nrefs)
7810 		g = s->nrefs;
7811 
7812 	if (g >= s->first_displayed_entry->idx + 1 &&
7813 	    g <= s->last_displayed_entry->idx + 1 &&
7814 	    g - s->first_displayed_entry->idx - 1 < nlines) {
7815 		s->selected = g - s->first_displayed_entry->idx - 1;
7816 		return NULL;
7817 	}
7818 
7819 	if (idx + 1 < g) {
7820 		err = ref_scroll_down(view, g - idx - 1);
7821 		if (err)
7822 			return err;
7823 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL &&
7824 		    s->first_displayed_entry->idx + s->selected < g &&
7825 		    s->selected < s->ndisplayed - 1)
7826 			s->selected = g - s->first_displayed_entry->idx - 1;
7827 	} else if (idx + 1 > g)
7828 		ref_scroll_up(s, idx - g + 1);
7829 
7830 	if (g < nlines && s->first_displayed_entry->idx == 0)
7831 		s->selected = g - 1;
7832 
7833 	return NULL;
7834 
7835 }
7836 
7837 static const struct got_error *
7838 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
7839 {
7840 	const struct got_error *err = NULL;
7841 	struct tog_ref_view_state *s = &view->state.ref;
7842 	struct tog_reflist_entry *re;
7843 	int n, nscroll = view->nlines - 1;
7844 
7845 	if (view->gline)
7846 		return ref_goto_line(view, nscroll);
7847 
7848 	switch (ch) {
7849 	case 'i':
7850 		s->show_ids = !s->show_ids;
7851 		view->count = 0;
7852 		break;
7853 	case 'm':
7854 		s->show_date = !s->show_date;
7855 		view->count = 0;
7856 		break;
7857 	case 'o':
7858 		s->sort_by_date = !s->sort_by_date;
7859 		view->count = 0;
7860 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
7861 		    got_ref_cmp_by_commit_timestamp_descending :
7862 		    tog_ref_cmp_by_name, s->repo);
7863 		if (err)
7864 			break;
7865 		got_reflist_object_id_map_free(tog_refs_idmap);
7866 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
7867 		    &tog_refs, s->repo);
7868 		if (err)
7869 			break;
7870 		ref_view_free_refs(s);
7871 		err = ref_view_load_refs(s);
7872 		break;
7873 	case KEY_ENTER:
7874 	case '\r':
7875 		view->count = 0;
7876 		if (!s->selected_entry)
7877 			break;
7878 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
7879 		break;
7880 	case 'T':
7881 		view->count = 0;
7882 		if (!s->selected_entry)
7883 			break;
7884 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
7885 		break;
7886 	case 'g':
7887 	case KEY_HOME:
7888 		s->selected = 0;
7889 		view->count = 0;
7890 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7891 		break;
7892 	case 'G':
7893 	case KEY_END: {
7894 		int eos = view->nlines - 1;
7895 
7896 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
7897 			--eos;  /* border */
7898 		s->selected = 0;
7899 		view->count = 0;
7900 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
7901 		for (n = 0; n < eos; n++) {
7902 			if (re == NULL)
7903 				break;
7904 			s->first_displayed_entry = re;
7905 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7906 		}
7907 		if (n > 0)
7908 			s->selected = n - 1;
7909 		break;
7910 	}
7911 	case 'k':
7912 	case KEY_UP:
7913 	case CTRL('p'):
7914 		if (s->selected > 0) {
7915 			s->selected--;
7916 			break;
7917 		}
7918 		ref_scroll_up(s, 1);
7919 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7920 			view->count = 0;
7921 		break;
7922 	case CTRL('u'):
7923 	case 'u':
7924 		nscroll /= 2;
7925 		/* FALL THROUGH */
7926 	case KEY_PPAGE:
7927 	case CTRL('b'):
7928 	case 'b':
7929 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7930 			s->selected -= MIN(nscroll, s->selected);
7931 		ref_scroll_up(s, MAX(0, nscroll));
7932 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7933 			view->count = 0;
7934 		break;
7935 	case 'j':
7936 	case KEY_DOWN:
7937 	case CTRL('n'):
7938 		if (s->selected < s->ndisplayed - 1) {
7939 			s->selected++;
7940 			break;
7941 		}
7942 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7943 			/* can't scroll any further */
7944 			view->count = 0;
7945 			break;
7946 		}
7947 		ref_scroll_down(view, 1);
7948 		break;
7949 	case CTRL('d'):
7950 	case 'd':
7951 		nscroll /= 2;
7952 		/* FALL THROUGH */
7953 	case KEY_NPAGE:
7954 	case CTRL('f'):
7955 	case 'f':
7956 	case ' ':
7957 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7958 			/* can't scroll any further; move cursor down */
7959 			if (s->selected < s->ndisplayed - 1)
7960 				s->selected += MIN(nscroll,
7961 				    s->ndisplayed - s->selected - 1);
7962 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7963 				s->selected += s->ndisplayed - s->selected - 1;
7964 			view->count = 0;
7965 			break;
7966 		}
7967 		ref_scroll_down(view, nscroll);
7968 		break;
7969 	case CTRL('l'):
7970 		view->count = 0;
7971 		tog_free_refs();
7972 		err = tog_load_refs(s->repo, s->sort_by_date);
7973 		if (err)
7974 			break;
7975 		ref_view_free_refs(s);
7976 		err = ref_view_load_refs(s);
7977 		break;
7978 	case KEY_RESIZE:
7979 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7980 			s->selected = view->nlines - 2;
7981 		break;
7982 	default:
7983 		view->count = 0;
7984 		break;
7985 	}
7986 
7987 	return err;
7988 }
7989 
7990 __dead static void
7991 usage_ref(void)
7992 {
7993 	endwin();
7994 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
7995 	    getprogname());
7996 	exit(1);
7997 }
7998 
7999 static const struct got_error *
8000 cmd_ref(int argc, char *argv[])
8001 {
8002 	const struct got_error *error;
8003 	struct got_repository *repo = NULL;
8004 	struct got_worktree *worktree = NULL;
8005 	char *cwd = NULL, *repo_path = NULL;
8006 	int ch;
8007 	struct tog_view *view;
8008 	int *pack_fds = NULL;
8009 
8010 	while ((ch = getopt(argc, argv, "r:")) != -1) {
8011 		switch (ch) {
8012 		case 'r':
8013 			repo_path = realpath(optarg, NULL);
8014 			if (repo_path == NULL)
8015 				return got_error_from_errno2("realpath",
8016 				    optarg);
8017 			break;
8018 		default:
8019 			usage_ref();
8020 			/* NOTREACHED */
8021 		}
8022 	}
8023 
8024 	argc -= optind;
8025 	argv += optind;
8026 
8027 	if (argc > 1)
8028 		usage_ref();
8029 
8030 	error = got_repo_pack_fds_open(&pack_fds);
8031 	if (error != NULL)
8032 		goto done;
8033 
8034 	if (repo_path == NULL) {
8035 		cwd = getcwd(NULL, 0);
8036 		if (cwd == NULL)
8037 			return got_error_from_errno("getcwd");
8038 		error = got_worktree_open(&worktree, cwd);
8039 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
8040 			goto done;
8041 		if (worktree)
8042 			repo_path =
8043 			    strdup(got_worktree_get_repo_path(worktree));
8044 		else
8045 			repo_path = strdup(cwd);
8046 		if (repo_path == NULL) {
8047 			error = got_error_from_errno("strdup");
8048 			goto done;
8049 		}
8050 	}
8051 
8052 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8053 	if (error != NULL)
8054 		goto done;
8055 
8056 	init_curses();
8057 
8058 	error = apply_unveil(got_repo_get_path(repo), NULL);
8059 	if (error)
8060 		goto done;
8061 
8062 	error = tog_load_refs(repo, 0);
8063 	if (error)
8064 		goto done;
8065 
8066 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
8067 	if (view == NULL) {
8068 		error = got_error_from_errno("view_open");
8069 		goto done;
8070 	}
8071 
8072 	error = open_ref_view(view, repo);
8073 	if (error)
8074 		goto done;
8075 
8076 	if (worktree) {
8077 		/* Release work tree lock. */
8078 		got_worktree_close(worktree);
8079 		worktree = NULL;
8080 	}
8081 	error = view_loop(view);
8082 done:
8083 	free(repo_path);
8084 	free(cwd);
8085 	if (repo) {
8086 		const struct got_error *close_err = got_repo_close(repo);
8087 		if (close_err)
8088 			error = close_err;
8089 	}
8090 	if (pack_fds) {
8091 		const struct got_error *pack_err =
8092 		    got_repo_pack_fds_close(pack_fds);
8093 		if (error == NULL)
8094 			error = pack_err;
8095 	}
8096 	tog_free_refs();
8097 	return error;
8098 }
8099 
8100 static const struct got_error *
8101 view_dispatch_request(struct tog_view **new_view, struct tog_view *view,
8102     enum tog_view_type request, int y, int x)
8103 {
8104 	const struct got_error *err = NULL;
8105 
8106 	*new_view = NULL;
8107 
8108 	switch (request) {
8109 	case TOG_VIEW_DIFF:
8110 		if (view->type == TOG_VIEW_LOG) {
8111 			struct tog_log_view_state *s = &view->state.log;
8112 
8113 			err = open_diff_view_for_commit(new_view, y, x,
8114 			    s->selected_entry->commit, s->selected_entry->id,
8115 			    view, s->repo);
8116 		} else
8117 			return got_error_msg(GOT_ERR_NOT_IMPL,
8118 			    "parent/child view pair not supported");
8119 		break;
8120 	case TOG_VIEW_BLAME:
8121 		if (view->type == TOG_VIEW_TREE) {
8122 			struct tog_tree_view_state *s = &view->state.tree;
8123 
8124 			err = blame_tree_entry(new_view, y, x,
8125 			    s->selected_entry, &s->parents, s->commit_id,
8126 			    s->repo);
8127 		} else
8128 			return got_error_msg(GOT_ERR_NOT_IMPL,
8129 			    "parent/child view pair not supported");
8130 		break;
8131 	case TOG_VIEW_LOG:
8132 		if (view->type == TOG_VIEW_BLAME)
8133 			err = log_annotated_line(new_view, y, x,
8134 			    view->state.blame.repo, view->state.blame.id_to_log);
8135 		else if (view->type == TOG_VIEW_TREE)
8136 			err = log_selected_tree_entry(new_view, y, x,
8137 			    &view->state.tree);
8138 		else if (view->type == TOG_VIEW_REF)
8139 			err = log_ref_entry(new_view, y, x,
8140 			    view->state.ref.selected_entry,
8141 			    view->state.ref.repo);
8142 		else
8143 			return got_error_msg(GOT_ERR_NOT_IMPL,
8144 			    "parent/child view pair not supported");
8145 		break;
8146 	case TOG_VIEW_TREE:
8147 		if (view->type == TOG_VIEW_LOG)
8148 			err = browse_commit_tree(new_view, y, x,
8149 			    view->state.log.selected_entry,
8150 			    view->state.log.in_repo_path,
8151 			    view->state.log.head_ref_name,
8152 			    view->state.log.repo);
8153 		else if (view->type == TOG_VIEW_REF)
8154 			err = browse_ref_tree(new_view, y, x,
8155 			    view->state.ref.selected_entry,
8156 			    view->state.ref.repo);
8157 		else
8158 			return got_error_msg(GOT_ERR_NOT_IMPL,
8159 			    "parent/child view pair not supported");
8160 		break;
8161 	case TOG_VIEW_REF:
8162 		*new_view = view_open(0, 0, y, x, TOG_VIEW_REF);
8163 		if (*new_view == NULL)
8164 			return got_error_from_errno("view_open");
8165 		if (view->type == TOG_VIEW_LOG)
8166 			err = open_ref_view(*new_view, view->state.log.repo);
8167 		else if (view->type == TOG_VIEW_TREE)
8168 			err = open_ref_view(*new_view, view->state.tree.repo);
8169 		else
8170 			err = got_error_msg(GOT_ERR_NOT_IMPL,
8171 			    "parent/child view pair not supported");
8172 		if (err)
8173 			view_close(*new_view);
8174 		break;
8175 	default:
8176 		return got_error_msg(GOT_ERR_NOT_IMPL, "invalid view");
8177 	}
8178 
8179 	return err;
8180 }
8181 
8182 /*
8183  * If view was scrolled down to move the selected line into view when opening a
8184  * horizontal split, scroll back up when closing the split/toggling fullscreen.
8185  */
8186 static void
8187 offset_selection_up(struct tog_view *view)
8188 {
8189 	switch (view->type) {
8190 	case TOG_VIEW_BLAME: {
8191 		struct tog_blame_view_state *s = &view->state.blame;
8192 		if (s->first_displayed_line == 1) {
8193 			s->selected_line = MAX(s->selected_line - view->offset,
8194 			    1);
8195 			break;
8196 		}
8197 		if (s->first_displayed_line > view->offset)
8198 			s->first_displayed_line -= view->offset;
8199 		else
8200 			s->first_displayed_line = 1;
8201 		s->selected_line += view->offset;
8202 		break;
8203 	}
8204 	case TOG_VIEW_LOG:
8205 		log_scroll_up(&view->state.log, view->offset);
8206 		view->state.log.selected += view->offset;
8207 		break;
8208 	case TOG_VIEW_REF:
8209 		ref_scroll_up(&view->state.ref, view->offset);
8210 		view->state.ref.selected += view->offset;
8211 		break;
8212 	case TOG_VIEW_TREE:
8213 		tree_scroll_up(&view->state.tree, view->offset);
8214 		view->state.tree.selected += view->offset;
8215 		break;
8216 	default:
8217 		break;
8218 	}
8219 
8220 	view->offset = 0;
8221 }
8222 
8223 /*
8224  * If the selected line is in the section of screen covered by the bottom split,
8225  * scroll down offset lines to move it into view and index its new position.
8226  */
8227 static const struct got_error *
8228 offset_selection_down(struct tog_view *view)
8229 {
8230 	const struct got_error	*err = NULL;
8231 	const struct got_error	*(*scrolld)(struct tog_view *, int);
8232 	int			*selected = NULL;
8233 	int			 header, offset;
8234 
8235 	switch (view->type) {
8236 	case TOG_VIEW_BLAME: {
8237 		struct tog_blame_view_state *s = &view->state.blame;
8238 		header = 3;
8239 		scrolld = NULL;
8240 		if (s->selected_line > view->nlines - header) {
8241 			offset = abs(view->nlines - s->selected_line - header);
8242 			s->first_displayed_line += offset;
8243 			s->selected_line -= offset;
8244 			view->offset = offset;
8245 		}
8246 		break;
8247 	}
8248 	case TOG_VIEW_LOG: {
8249 		struct tog_log_view_state *s = &view->state.log;
8250 		scrolld = &log_scroll_down;
8251 		header = view_is_parent_view(view) ? 3 : 2;
8252 		selected = &s->selected;
8253 		break;
8254 	}
8255 	case TOG_VIEW_REF: {
8256 		struct tog_ref_view_state *s = &view->state.ref;
8257 		scrolld = &ref_scroll_down;
8258 		header = 3;
8259 		selected = &s->selected;
8260 		break;
8261 	}
8262 	case TOG_VIEW_TREE: {
8263 		struct tog_tree_view_state *s = &view->state.tree;
8264 		scrolld = &tree_scroll_down;
8265 		header = 5;
8266 		selected = &s->selected;
8267 		break;
8268 	}
8269 	default:
8270 		selected = NULL;
8271 		scrolld = NULL;
8272 		header = 0;
8273 		break;
8274 	}
8275 
8276 	if (selected && *selected > view->nlines - header) {
8277 		offset = abs(view->nlines - *selected - header);
8278 		view->offset = offset;
8279 		if (scrolld && offset) {
8280 			err = scrolld(view, offset);
8281 			*selected -= offset;
8282 		}
8283 	}
8284 
8285 	return err;
8286 }
8287 
8288 static void
8289 list_commands(FILE *fp)
8290 {
8291 	size_t i;
8292 
8293 	fprintf(fp, "commands:");
8294 	for (i = 0; i < nitems(tog_commands); i++) {
8295 		const struct tog_cmd *cmd = &tog_commands[i];
8296 		fprintf(fp, " %s", cmd->name);
8297 	}
8298 	fputc('\n', fp);
8299 }
8300 
8301 __dead static void
8302 usage(int hflag, int status)
8303 {
8304 	FILE *fp = (status == 0) ? stdout : stderr;
8305 
8306 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
8307 	    getprogname());
8308 	if (hflag) {
8309 		fprintf(fp, "lazy usage: %s path\n", getprogname());
8310 		list_commands(fp);
8311 	}
8312 	exit(status);
8313 }
8314 
8315 static char **
8316 make_argv(int argc, ...)
8317 {
8318 	va_list ap;
8319 	char **argv;
8320 	int i;
8321 
8322 	va_start(ap, argc);
8323 
8324 	argv = calloc(argc, sizeof(char *));
8325 	if (argv == NULL)
8326 		err(1, "calloc");
8327 	for (i = 0; i < argc; i++) {
8328 		argv[i] = strdup(va_arg(ap, char *));
8329 		if (argv[i] == NULL)
8330 			err(1, "strdup");
8331 	}
8332 
8333 	va_end(ap);
8334 	return argv;
8335 }
8336 
8337 /*
8338  * Try to convert 'tog path' into a 'tog log path' command.
8339  * The user could simply have mistyped the command rather than knowingly
8340  * provided a path. So check whether argv[0] can in fact be resolved
8341  * to a path in the HEAD commit and print a special error if not.
8342  * This hack is for mpi@ <3
8343  */
8344 static const struct got_error *
8345 tog_log_with_path(int argc, char *argv[])
8346 {
8347 	const struct got_error *error = NULL, *close_err;
8348 	const struct tog_cmd *cmd = NULL;
8349 	struct got_repository *repo = NULL;
8350 	struct got_worktree *worktree = NULL;
8351 	struct got_object_id *commit_id = NULL, *id = NULL;
8352 	struct got_commit_object *commit = NULL;
8353 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
8354 	char *commit_id_str = NULL, **cmd_argv = NULL;
8355 	int *pack_fds = NULL;
8356 
8357 	cwd = getcwd(NULL, 0);
8358 	if (cwd == NULL)
8359 		return got_error_from_errno("getcwd");
8360 
8361 	error = got_repo_pack_fds_open(&pack_fds);
8362 	if (error != NULL)
8363 		goto done;
8364 
8365 	error = got_worktree_open(&worktree, cwd);
8366 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
8367 		goto done;
8368 
8369 	if (worktree)
8370 		repo_path = strdup(got_worktree_get_repo_path(worktree));
8371 	else
8372 		repo_path = strdup(cwd);
8373 	if (repo_path == NULL) {
8374 		error = got_error_from_errno("strdup");
8375 		goto done;
8376 	}
8377 
8378 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8379 	if (error != NULL)
8380 		goto done;
8381 
8382 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
8383 	    repo, worktree);
8384 	if (error)
8385 		goto done;
8386 
8387 	error = tog_load_refs(repo, 0);
8388 	if (error)
8389 		goto done;
8390 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
8391 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
8392 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
8393 	if (error)
8394 		goto done;
8395 
8396 	if (worktree) {
8397 		got_worktree_close(worktree);
8398 		worktree = NULL;
8399 	}
8400 
8401 	error = got_object_open_as_commit(&commit, repo, commit_id);
8402 	if (error)
8403 		goto done;
8404 
8405 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
8406 	if (error) {
8407 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
8408 			goto done;
8409 		fprintf(stderr, "%s: '%s' is no known command or path\n",
8410 		    getprogname(), argv[0]);
8411 		usage(1, 1);
8412 		/* not reached */
8413 	}
8414 
8415 	error = got_object_id_str(&commit_id_str, commit_id);
8416 	if (error)
8417 		goto done;
8418 
8419 	cmd = &tog_commands[0]; /* log */
8420 	argc = 4;
8421 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
8422 	error = cmd->cmd_main(argc, cmd_argv);
8423 done:
8424 	if (repo) {
8425 		close_err = got_repo_close(repo);
8426 		if (error == NULL)
8427 			error = close_err;
8428 	}
8429 	if (commit)
8430 		got_object_commit_close(commit);
8431 	if (worktree)
8432 		got_worktree_close(worktree);
8433 	if (pack_fds) {
8434 		const struct got_error *pack_err =
8435 		    got_repo_pack_fds_close(pack_fds);
8436 		if (error == NULL)
8437 			error = pack_err;
8438 	}
8439 	free(id);
8440 	free(commit_id_str);
8441 	free(commit_id);
8442 	free(cwd);
8443 	free(repo_path);
8444 	free(in_repo_path);
8445 	if (cmd_argv) {
8446 		int i;
8447 		for (i = 0; i < argc; i++)
8448 			free(cmd_argv[i]);
8449 		free(cmd_argv);
8450 	}
8451 	tog_free_refs();
8452 	return error;
8453 }
8454 
8455 int
8456 main(int argc, char *argv[])
8457 {
8458 	const struct got_error *error = NULL;
8459 	const struct tog_cmd *cmd = NULL;
8460 	int ch, hflag = 0, Vflag = 0;
8461 	char **cmd_argv = NULL;
8462 	static const struct option longopts[] = {
8463 	    { "version", no_argument, NULL, 'V' },
8464 	    { NULL, 0, NULL, 0}
8465 	};
8466 	char *diff_algo_str = NULL;
8467 
8468 	setlocale(LC_CTYPE, "");
8469 
8470 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
8471 		switch (ch) {
8472 		case 'h':
8473 			hflag = 1;
8474 			break;
8475 		case 'V':
8476 			Vflag = 1;
8477 			break;
8478 		default:
8479 			usage(hflag, 1);
8480 			/* NOTREACHED */
8481 		}
8482 	}
8483 
8484 	argc -= optind;
8485 	argv += optind;
8486 	optind = 1;
8487 	optreset = 1;
8488 
8489 	if (Vflag) {
8490 		got_version_print_str();
8491 		return 0;
8492 	}
8493 
8494 #ifndef PROFILE
8495 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
8496 	    NULL) == -1)
8497 		err(1, "pledge");
8498 #endif
8499 
8500 	if (argc == 0) {
8501 		if (hflag)
8502 			usage(hflag, 0);
8503 		/* Build an argument vector which runs a default command. */
8504 		cmd = &tog_commands[0];
8505 		argc = 1;
8506 		cmd_argv = make_argv(argc, cmd->name);
8507 	} else {
8508 		size_t i;
8509 
8510 		/* Did the user specify a command? */
8511 		for (i = 0; i < nitems(tog_commands); i++) {
8512 			if (strncmp(tog_commands[i].name, argv[0],
8513 			    strlen(argv[0])) == 0) {
8514 				cmd = &tog_commands[i];
8515 				break;
8516 			}
8517 		}
8518 	}
8519 
8520 	diff_algo_str = getenv("TOG_DIFF_ALGORITHM");
8521 	if (diff_algo_str) {
8522 		if (strcasecmp(diff_algo_str, "patience") == 0)
8523 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
8524 		if (strcasecmp(diff_algo_str, "myers") == 0)
8525 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
8526 	}
8527 
8528 	if (cmd == NULL) {
8529 		if (argc != 1)
8530 			usage(0, 1);
8531 		/* No command specified; try log with a path */
8532 		error = tog_log_with_path(argc, argv);
8533 	} else {
8534 		if (hflag)
8535 			cmd->cmd_usage();
8536 		else
8537 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
8538 	}
8539 
8540 	endwin();
8541 	putchar('\n');
8542 	if (cmd_argv) {
8543 		int i;
8544 		for (i = 0; i < argc; i++)
8545 			free(cmd_argv[i]);
8546 		free(cmd_argv);
8547 	}
8548 
8549 	if (error && error->code != GOT_ERR_CANCELLED)
8550 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
8551 	return 0;
8552 }