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 	if (s->first_displayed_entry && s->last_displayed_entry) {
3213 		s->selected = MIN(s->selected,
3214 		    s->last_displayed_entry->idx -
3215 		    s->first_displayed_entry->idx);
3216 	}
3217 
3218 	select_commit(s);
3219 
3220 	if (s->thread_args.log_complete &&
3221 	    s->selected_entry->idx == s->commits.ncommits - 1)
3222 		view->count = 0;
3223 
3224 	return NULL;
3225 }
3226 
3227 static void
3228 view_get_split(struct tog_view *view, int *y, int *x)
3229 {
3230 	*x = 0;
3231 	*y = 0;
3232 
3233 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
3234 		if (view->child && view->child->resized_y)
3235 			*y = view->child->resized_y;
3236 		else if (view->resized_y)
3237 			*y = view->resized_y;
3238 		else
3239 			*y = view_split_begin_y(view->lines);
3240 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
3241 		if (view->child && view->child->resized_x)
3242 			*x = view->child->resized_x;
3243 		else if (view->resized_x)
3244 			*x = view->resized_x;
3245 		else
3246 			*x = view_split_begin_x(view->begin_x);
3247 	}
3248 }
3249 
3250 /* Split view horizontally at y and offset view->state->selected line. */
3251 static const struct got_error *
3252 view_init_hsplit(struct tog_view *view, int y)
3253 {
3254 	const struct got_error *err = NULL;
3255 
3256 	view->nlines = y;
3257 	view->ncols = COLS;
3258 	err = view_resize(view);
3259 	if (err)
3260 		return err;
3261 
3262 	err = offset_selection_down(view);
3263 
3264 	return err;
3265 }
3266 
3267 static const struct got_error *
3268 log_goto_line(struct tog_view *view, int nlines)
3269 {
3270 	const struct got_error		*err = NULL;
3271 	struct tog_log_view_state	*s = &view->state.log;
3272 	int				 g, idx = s->selected_entry->idx;
3273 
3274 	if (s->first_displayed_entry == NULL || s->last_displayed_entry == NULL)
3275 		return NULL;
3276 
3277 	g = view->gline;
3278 	view->gline = 0;
3279 
3280 	if (g >= s->first_displayed_entry->idx + 1 &&
3281 	    g <= s->last_displayed_entry->idx + 1 &&
3282 	    g - s->first_displayed_entry->idx - 1 < nlines) {
3283 		s->selected = g - s->first_displayed_entry->idx - 1;
3284 		select_commit(s);
3285 		return NULL;
3286 	}
3287 
3288 	if (idx + 1 < g) {
3289 		err = log_move_cursor_down(view, g - idx - 1);
3290 		if (!err && g > s->selected_entry->idx + 1)
3291 			err = log_move_cursor_down(view,
3292 			    g - s->first_displayed_entry->idx - 1);
3293 		if (err)
3294 			return err;
3295 	} else if (idx + 1 > g)
3296 		log_move_cursor_up(view, idx - g + 1, 0);
3297 
3298 	if (g < nlines && s->first_displayed_entry->idx == 0)
3299 		s->selected = g - 1;
3300 
3301 	select_commit(s);
3302 	return NULL;
3303 
3304 }
3305 
3306 static const struct got_error *
3307 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
3308 {
3309 	const struct got_error *err = NULL;
3310 	struct tog_log_view_state *s = &view->state.log;
3311 	int eos, nscroll;
3312 
3313 	if (s->thread_args.load_all) {
3314 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
3315 			s->thread_args.load_all = 0;
3316 		else if (s->thread_args.log_complete) {
3317 			err = log_move_cursor_down(view, s->commits.ncommits);
3318 			s->thread_args.load_all = 0;
3319 		}
3320 		if (err)
3321 			return err;
3322 	}
3323 
3324 	eos = nscroll = view->nlines - 1;
3325 	if (view_is_hsplit_top(view))
3326 		--eos;  /* border */
3327 
3328 	if (view->gline)
3329 		return log_goto_line(view, eos);
3330 
3331 	switch (ch) {
3332 	case 'q':
3333 		s->quit = 1;
3334 		break;
3335 	case '0':
3336 		view->x = 0;
3337 		break;
3338 	case '$':
3339 		view->x = MAX(view->maxx - view->ncols / 2, 0);
3340 		view->count = 0;
3341 		break;
3342 	case KEY_RIGHT:
3343 	case 'l':
3344 		if (view->x + view->ncols / 2 < view->maxx)
3345 			view->x += 2;  /* move two columns right */
3346 		else
3347 			view->count = 0;
3348 		break;
3349 	case KEY_LEFT:
3350 	case 'h':
3351 		view->x -= MIN(view->x, 2);  /* move two columns back */
3352 		if (view->x <= 0)
3353 			view->count = 0;
3354 		break;
3355 	case 'k':
3356 	case KEY_UP:
3357 	case '<':
3358 	case ',':
3359 	case CTRL('p'):
3360 		log_move_cursor_up(view, 0, 0);
3361 		break;
3362 	case 'g':
3363 	case KEY_HOME:
3364 		log_move_cursor_up(view, 0, 1);
3365 		view->count = 0;
3366 		break;
3367 	case CTRL('u'):
3368 	case 'u':
3369 		nscroll /= 2;
3370 		/* FALL THROUGH */
3371 	case KEY_PPAGE:
3372 	case CTRL('b'):
3373 	case 'b':
3374 		log_move_cursor_up(view, nscroll, 0);
3375 		break;
3376 	case 'j':
3377 	case KEY_DOWN:
3378 	case '>':
3379 	case '.':
3380 	case CTRL('n'):
3381 		err = log_move_cursor_down(view, 0);
3382 		break;
3383 	case '@':
3384 		s->use_committer = !s->use_committer;
3385 		break;
3386 	case 'G':
3387 	case KEY_END: {
3388 		/* We don't know yet how many commits, so we're forced to
3389 		 * traverse them all. */
3390 		view->count = 0;
3391 		s->thread_args.load_all = 1;
3392 		if (!s->thread_args.log_complete)
3393 			return trigger_log_thread(view, 0);
3394 		err = log_move_cursor_down(view, s->commits.ncommits);
3395 		s->thread_args.load_all = 0;
3396 		break;
3397 	}
3398 	case CTRL('d'):
3399 	case 'd':
3400 		nscroll /= 2;
3401 		/* FALL THROUGH */
3402 	case KEY_NPAGE:
3403 	case CTRL('f'):
3404 	case 'f':
3405 	case ' ':
3406 		err = log_move_cursor_down(view, nscroll);
3407 		break;
3408 	case KEY_RESIZE:
3409 		if (s->selected > view->nlines - 2)
3410 			s->selected = view->nlines - 2;
3411 		if (s->selected > s->commits.ncommits - 1)
3412 			s->selected = s->commits.ncommits - 1;
3413 		select_commit(s);
3414 		if (s->commits.ncommits < view->nlines - 1 &&
3415 		    !s->thread_args.log_complete) {
3416 			s->thread_args.commits_needed += (view->nlines - 1) -
3417 			    s->commits.ncommits;
3418 			err = trigger_log_thread(view, 1);
3419 		}
3420 		break;
3421 	case KEY_ENTER:
3422 	case '\r':
3423 		view->count = 0;
3424 		if (s->selected_entry == NULL)
3425 			break;
3426 		err = view_request_new(new_view, view, TOG_VIEW_DIFF);
3427 		break;
3428 	case 'T':
3429 		view->count = 0;
3430 		if (s->selected_entry == NULL)
3431 			break;
3432 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
3433 		break;
3434 	case KEY_BACKSPACE:
3435 	case CTRL('l'):
3436 	case 'B':
3437 		view->count = 0;
3438 		if (ch == KEY_BACKSPACE &&
3439 		    got_path_is_root_dir(s->in_repo_path))
3440 			break;
3441 		err = stop_log_thread(s);
3442 		if (err)
3443 			return err;
3444 		if (ch == KEY_BACKSPACE) {
3445 			char *parent_path;
3446 			err = got_path_dirname(&parent_path, s->in_repo_path);
3447 			if (err)
3448 				return err;
3449 			free(s->in_repo_path);
3450 			s->in_repo_path = parent_path;
3451 			s->thread_args.in_repo_path = s->in_repo_path;
3452 		} else if (ch == CTRL('l')) {
3453 			struct got_object_id *start_id;
3454 			err = got_repo_match_object_id(&start_id, NULL,
3455 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
3456 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
3457 			if (err)
3458 				return err;
3459 			free(s->start_id);
3460 			s->start_id = start_id;
3461 			s->thread_args.start_id = s->start_id;
3462 		} else /* 'B' */
3463 			s->log_branches = !s->log_branches;
3464 
3465 		if (s->thread_args.pack_fds == NULL) {
3466 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3467 			if (err)
3468 				return err;
3469 		}
3470 		err = got_repo_open(&s->thread_args.repo,
3471 		    got_repo_get_path(s->repo), NULL,
3472 		    s->thread_args.pack_fds);
3473 		if (err)
3474 			return err;
3475 		tog_free_refs();
3476 		err = tog_load_refs(s->repo, 0);
3477 		if (err)
3478 			return err;
3479 		err = got_commit_graph_open(&s->thread_args.graph,
3480 		    s->in_repo_path, !s->log_branches);
3481 		if (err)
3482 			return err;
3483 		err = got_commit_graph_iter_start(s->thread_args.graph,
3484 		    s->start_id, s->repo, NULL, NULL);
3485 		if (err)
3486 			return err;
3487 		free_commits(&s->commits);
3488 		s->first_displayed_entry = NULL;
3489 		s->last_displayed_entry = NULL;
3490 		s->selected_entry = NULL;
3491 		s->selected = 0;
3492 		s->thread_args.log_complete = 0;
3493 		s->quit = 0;
3494 		s->thread_args.commits_needed = view->lines;
3495 		s->matched_entry = NULL;
3496 		s->search_entry = NULL;
3497 		view->offset = 0;
3498 		break;
3499 	case 'R':
3500 		view->count = 0;
3501 		err = view_request_new(new_view, view, TOG_VIEW_REF);
3502 		break;
3503 	default:
3504 		view->count = 0;
3505 		break;
3506 	}
3507 
3508 	return err;
3509 }
3510 
3511 static const struct got_error *
3512 apply_unveil(const char *repo_path, const char *worktree_path)
3513 {
3514 	const struct got_error *error;
3515 
3516 #ifdef PROFILE
3517 	if (unveil("gmon.out", "rwc") != 0)
3518 		return got_error_from_errno2("unveil", "gmon.out");
3519 #endif
3520 	if (repo_path && unveil(repo_path, "r") != 0)
3521 		return got_error_from_errno2("unveil", repo_path);
3522 
3523 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
3524 		return got_error_from_errno2("unveil", worktree_path);
3525 
3526 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
3527 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
3528 
3529 	error = got_privsep_unveil_exec_helpers();
3530 	if (error != NULL)
3531 		return error;
3532 
3533 	if (unveil(NULL, NULL) != 0)
3534 		return got_error_from_errno("unveil");
3535 
3536 	return NULL;
3537 }
3538 
3539 static void
3540 init_curses(void)
3541 {
3542 	/*
3543 	 * Override default signal handlers before starting ncurses.
3544 	 * This should prevent ncurses from installing its own
3545 	 * broken cleanup() signal handler.
3546 	 */
3547 	signal(SIGWINCH, tog_sigwinch);
3548 	signal(SIGPIPE, tog_sigpipe);
3549 	signal(SIGCONT, tog_sigcont);
3550 	signal(SIGINT, tog_sigint);
3551 	signal(SIGTERM, tog_sigterm);
3552 
3553 	initscr();
3554 	cbreak();
3555 	halfdelay(1); /* Do fast refresh while initial view is loading. */
3556 	noecho();
3557 	nonl();
3558 	intrflush(stdscr, FALSE);
3559 	keypad(stdscr, TRUE);
3560 	curs_set(0);
3561 	if (getenv("TOG_COLORS") != NULL) {
3562 		start_color();
3563 		use_default_colors();
3564 	}
3565 }
3566 
3567 static const struct got_error *
3568 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
3569     struct got_repository *repo, struct got_worktree *worktree)
3570 {
3571 	const struct got_error *err = NULL;
3572 
3573 	if (argc == 0) {
3574 		*in_repo_path = strdup("/");
3575 		if (*in_repo_path == NULL)
3576 			return got_error_from_errno("strdup");
3577 		return NULL;
3578 	}
3579 
3580 	if (worktree) {
3581 		const char *prefix = got_worktree_get_path_prefix(worktree);
3582 		char *p;
3583 
3584 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3585 		if (err)
3586 			return err;
3587 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3588 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3589 		    p) == -1) {
3590 			err = got_error_from_errno("asprintf");
3591 			*in_repo_path = NULL;
3592 		}
3593 		free(p);
3594 	} else
3595 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3596 
3597 	return err;
3598 }
3599 
3600 static const struct got_error *
3601 cmd_log(int argc, char *argv[])
3602 {
3603 	const struct got_error *error;
3604 	struct got_repository *repo = NULL;
3605 	struct got_worktree *worktree = NULL;
3606 	struct got_object_id *start_id = NULL;
3607 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3608 	char *start_commit = NULL, *label = NULL;
3609 	struct got_reference *ref = NULL;
3610 	const char *head_ref_name = NULL;
3611 	int ch, log_branches = 0;
3612 	struct tog_view *view;
3613 	int *pack_fds = NULL;
3614 
3615 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3616 		switch (ch) {
3617 		case 'b':
3618 			log_branches = 1;
3619 			break;
3620 		case 'c':
3621 			start_commit = optarg;
3622 			break;
3623 		case 'r':
3624 			repo_path = realpath(optarg, NULL);
3625 			if (repo_path == NULL)
3626 				return got_error_from_errno2("realpath",
3627 				    optarg);
3628 			break;
3629 		default:
3630 			usage_log();
3631 			/* NOTREACHED */
3632 		}
3633 	}
3634 
3635 	argc -= optind;
3636 	argv += optind;
3637 
3638 	if (argc > 1)
3639 		usage_log();
3640 
3641 	error = got_repo_pack_fds_open(&pack_fds);
3642 	if (error != NULL)
3643 		goto done;
3644 
3645 	if (repo_path == NULL) {
3646 		cwd = getcwd(NULL, 0);
3647 		if (cwd == NULL)
3648 			return got_error_from_errno("getcwd");
3649 		error = got_worktree_open(&worktree, cwd);
3650 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3651 			goto done;
3652 		if (worktree)
3653 			repo_path =
3654 			    strdup(got_worktree_get_repo_path(worktree));
3655 		else
3656 			repo_path = strdup(cwd);
3657 		if (repo_path == NULL) {
3658 			error = got_error_from_errno("strdup");
3659 			goto done;
3660 		}
3661 	}
3662 
3663 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3664 	if (error != NULL)
3665 		goto done;
3666 
3667 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3668 	    repo, worktree);
3669 	if (error)
3670 		goto done;
3671 
3672 	init_curses();
3673 
3674 	error = apply_unveil(got_repo_get_path(repo),
3675 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3676 	if (error)
3677 		goto done;
3678 
3679 	/* already loaded by tog_log_with_path()? */
3680 	if (TAILQ_EMPTY(&tog_refs)) {
3681 		error = tog_load_refs(repo, 0);
3682 		if (error)
3683 			goto done;
3684 	}
3685 
3686 	if (start_commit == NULL) {
3687 		error = got_repo_match_object_id(&start_id, &label,
3688 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3689 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3690 		if (error)
3691 			goto done;
3692 		head_ref_name = label;
3693 	} else {
3694 		error = got_ref_open(&ref, repo, start_commit, 0);
3695 		if (error == NULL)
3696 			head_ref_name = got_ref_get_name(ref);
3697 		else if (error->code != GOT_ERR_NOT_REF)
3698 			goto done;
3699 		error = got_repo_match_object_id(&start_id, NULL,
3700 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3701 		if (error)
3702 			goto done;
3703 	}
3704 
3705 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3706 	if (view == NULL) {
3707 		error = got_error_from_errno("view_open");
3708 		goto done;
3709 	}
3710 	error = open_log_view(view, start_id, repo, head_ref_name,
3711 	    in_repo_path, log_branches);
3712 	if (error)
3713 		goto done;
3714 	if (worktree) {
3715 		/* Release work tree lock. */
3716 		got_worktree_close(worktree);
3717 		worktree = NULL;
3718 	}
3719 	error = view_loop(view);
3720 done:
3721 	free(in_repo_path);
3722 	free(repo_path);
3723 	free(cwd);
3724 	free(start_id);
3725 	free(label);
3726 	if (ref)
3727 		got_ref_close(ref);
3728 	if (repo) {
3729 		const struct got_error *close_err = got_repo_close(repo);
3730 		if (error == NULL)
3731 			error = close_err;
3732 	}
3733 	if (worktree)
3734 		got_worktree_close(worktree);
3735 	if (pack_fds) {
3736 		const struct got_error *pack_err =
3737 		    got_repo_pack_fds_close(pack_fds);
3738 		if (error == NULL)
3739 			error = pack_err;
3740 	}
3741 	tog_free_refs();
3742 	return error;
3743 }
3744 
3745 __dead static void
3746 usage_diff(void)
3747 {
3748 	endwin();
3749 	fprintf(stderr, "usage: %s diff [-aw] [-C number] [-r repository-path] "
3750 	    "object1 object2\n", getprogname());
3751 	exit(1);
3752 }
3753 
3754 static int
3755 match_line(const char *line, regex_t *regex, size_t nmatch,
3756     regmatch_t *regmatch)
3757 {
3758 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3759 }
3760 
3761 static struct tog_color *
3762 match_color(struct tog_colors *colors, const char *line)
3763 {
3764 	struct tog_color *tc = NULL;
3765 
3766 	STAILQ_FOREACH(tc, colors, entry) {
3767 		if (match_line(line, &tc->regex, 0, NULL))
3768 			return tc;
3769 	}
3770 
3771 	return NULL;
3772 }
3773 
3774 static const struct got_error *
3775 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3776     WINDOW *window, int skipcol, regmatch_t *regmatch)
3777 {
3778 	const struct got_error *err = NULL;
3779 	char *exstr = NULL;
3780 	wchar_t *wline = NULL;
3781 	int rme, rms, n, width, scrollx;
3782 	int width0 = 0, width1 = 0, width2 = 0;
3783 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3784 
3785 	*wtotal = 0;
3786 
3787 	rms = regmatch->rm_so;
3788 	rme = regmatch->rm_eo;
3789 
3790 	err = expand_tab(&exstr, line);
3791 	if (err)
3792 		return err;
3793 
3794 	/* Split the line into 3 segments, according to match offsets. */
3795 	seg0 = strndup(exstr, rms);
3796 	if (seg0 == NULL) {
3797 		err = got_error_from_errno("strndup");
3798 		goto done;
3799 	}
3800 	seg1 = strndup(exstr + rms, rme - rms);
3801 	if (seg1 == NULL) {
3802 		err = got_error_from_errno("strndup");
3803 		goto done;
3804 	}
3805 	seg2 = strdup(exstr + rme);
3806 	if (seg2 == NULL) {
3807 		err = got_error_from_errno("strndup");
3808 		goto done;
3809 	}
3810 
3811 	/* draw up to matched token if we haven't scrolled past it */
3812 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3813 	    col_tab_align, 1);
3814 	if (err)
3815 		goto done;
3816 	n = MAX(width0 - skipcol, 0);
3817 	if (n) {
3818 		free(wline);
3819 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3820 		    wlimit, col_tab_align, 1);
3821 		if (err)
3822 			goto done;
3823 		waddwstr(window, &wline[scrollx]);
3824 		wlimit -= width;
3825 		*wtotal += width;
3826 	}
3827 
3828 	if (wlimit > 0) {
3829 		int i = 0, w = 0;
3830 		size_t wlen;
3831 
3832 		free(wline);
3833 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3834 		    col_tab_align, 1);
3835 		if (err)
3836 			goto done;
3837 		wlen = wcslen(wline);
3838 		while (i < wlen) {
3839 			width = wcwidth(wline[i]);
3840 			if (width == -1) {
3841 				/* should not happen, tabs are expanded */
3842 				err = got_error(GOT_ERR_RANGE);
3843 				goto done;
3844 			}
3845 			if (width0 + w + width > skipcol)
3846 				break;
3847 			w += width;
3848 			i++;
3849 		}
3850 		/* draw (visible part of) matched token (if scrolled into it) */
3851 		if (width1 - w > 0) {
3852 			wattron(window, A_STANDOUT);
3853 			waddwstr(window, &wline[i]);
3854 			wattroff(window, A_STANDOUT);
3855 			wlimit -= (width1 - w);
3856 			*wtotal += (width1 - w);
3857 		}
3858 	}
3859 
3860 	if (wlimit > 0) {  /* draw rest of line */
3861 		free(wline);
3862 		if (skipcol > width0 + width1) {
3863 			err = format_line(&wline, &width2, &scrollx, seg2,
3864 			    skipcol - (width0 + width1), wlimit,
3865 			    col_tab_align, 1);
3866 			if (err)
3867 				goto done;
3868 			waddwstr(window, &wline[scrollx]);
3869 		} else {
3870 			err = format_line(&wline, &width2, NULL, seg2, 0,
3871 			    wlimit, col_tab_align, 1);
3872 			if (err)
3873 				goto done;
3874 			waddwstr(window, wline);
3875 		}
3876 		*wtotal += width2;
3877 	}
3878 done:
3879 	free(wline);
3880 	free(exstr);
3881 	free(seg0);
3882 	free(seg1);
3883 	free(seg2);
3884 	return err;
3885 }
3886 
3887 static int
3888 gotoline(struct tog_view *view, int *lineno, int *nprinted)
3889 {
3890 	FILE	*f = NULL;
3891 	int	*eof, *first, *selected;
3892 
3893 	if (view->type == TOG_VIEW_DIFF) {
3894 		struct tog_diff_view_state *s = &view->state.diff;
3895 
3896 		first = &s->first_displayed_line;
3897 		selected = first;
3898 		eof = &s->eof;
3899 		f = s->f;
3900 	} else if (view->type == TOG_VIEW_BLAME) {
3901 		struct tog_blame_view_state *s = &view->state.blame;
3902 
3903 		first = &s->first_displayed_line;
3904 		selected = &s->selected_line;
3905 		eof = &s->eof;
3906 		f = s->blame.f;
3907 	} else
3908 		return 0;
3909 
3910 	/* Center gline in the middle of the page like vi(1). */
3911 	if (*lineno < view->gline - (view->nlines - 3) / 2)
3912 		return 0;
3913 	if (*first != 1 && (*lineno > view->gline - (view->nlines - 3) / 2)) {
3914 		rewind(f);
3915 		*eof = 0;
3916 		*first = 1;
3917 		*lineno = 0;
3918 		*nprinted = 0;
3919 		return 0;
3920 	}
3921 
3922 	*selected = view->gline <= (view->nlines - 3) / 2 ?
3923 		view->gline : (view->nlines - 3) / 2 + 1;
3924 	view->gline = 0;
3925 
3926 	return 1;
3927 }
3928 
3929 static const struct got_error *
3930 draw_file(struct tog_view *view, const char *header)
3931 {
3932 	struct tog_diff_view_state *s = &view->state.diff;
3933 	regmatch_t *regmatch = &view->regmatch;
3934 	const struct got_error *err;
3935 	int nprinted = 0;
3936 	char *line;
3937 	size_t linesize = 0;
3938 	ssize_t linelen;
3939 	wchar_t *wline;
3940 	int width;
3941 	int max_lines = view->nlines;
3942 	int nlines = s->nlines;
3943 	off_t line_offset;
3944 
3945 	s->lineno = s->first_displayed_line - 1;
3946 	line_offset = s->lines[s->first_displayed_line - 1].offset;
3947 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3948 		return got_error_from_errno("fseek");
3949 
3950 	werase(view->window);
3951 
3952 	if (view->gline > s->nlines - 1)
3953 		view->gline = s->nlines - 1;
3954 
3955 	if (header) {
3956 		int ln = view->gline ? view->gline <= (view->nlines - 3) / 2 ?
3957 		    1 : view->gline - (view->nlines - 3) / 2 :
3958 		    s->lineno + s->selected_line;
3959 
3960 		if (asprintf(&line, "[%d/%d] %s", ln, nlines, header) == -1)
3961 			return got_error_from_errno("asprintf");
3962 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3963 		    0, 0);
3964 		free(line);
3965 		if (err)
3966 			return err;
3967 
3968 		if (view_needs_focus_indication(view))
3969 			wstandout(view->window);
3970 		waddwstr(view->window, wline);
3971 		free(wline);
3972 		wline = NULL;
3973 		if (view_needs_focus_indication(view))
3974 			wstandend(view->window);
3975 		if (width <= view->ncols - 1)
3976 			waddch(view->window, '\n');
3977 
3978 		if (max_lines <= 1)
3979 			return NULL;
3980 		max_lines--;
3981 	}
3982 
3983 	s->eof = 0;
3984 	view->maxx = 0;
3985 	line = NULL;
3986 	while (max_lines > 0 && nprinted < max_lines) {
3987 		enum got_diff_line_type linetype;
3988 		attr_t attr = 0;
3989 
3990 		linelen = getline(&line, &linesize, s->f);
3991 		if (linelen == -1) {
3992 			if (feof(s->f)) {
3993 				s->eof = 1;
3994 				break;
3995 			}
3996 			free(line);
3997 			return got_ferror(s->f, GOT_ERR_IO);
3998 		}
3999 
4000 		if (++s->lineno < s->first_displayed_line)
4001 			continue;
4002 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
4003 			continue;
4004 		if (s->lineno == view->hiline)
4005 			attr = A_STANDOUT;
4006 
4007 		/* Set view->maxx based on full line length. */
4008 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
4009 		    view->x ? 1 : 0);
4010 		if (err) {
4011 			free(line);
4012 			return err;
4013 		}
4014 		view->maxx = MAX(view->maxx, width);
4015 		free(wline);
4016 		wline = NULL;
4017 
4018 		linetype = s->lines[s->lineno].type;
4019 		if (linetype > GOT_DIFF_LINE_LOGMSG &&
4020 		    linetype < GOT_DIFF_LINE_CONTEXT)
4021 			attr |= COLOR_PAIR(linetype);
4022 		if (attr)
4023 			wattron(view->window, attr);
4024 		if (s->first_displayed_line + nprinted == s->matched_line &&
4025 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4026 			err = add_matched_line(&width, line, view->ncols, 0,
4027 			    view->window, view->x, regmatch);
4028 			if (err) {
4029 				free(line);
4030 				return err;
4031 			}
4032 		} else {
4033 			int skip;
4034 			err = format_line(&wline, &width, &skip, line,
4035 			    view->x, view->ncols, 0, view->x ? 1 : 0);
4036 			if (err) {
4037 				free(line);
4038 				return err;
4039 			}
4040 			waddwstr(view->window, &wline[skip]);
4041 			free(wline);
4042 			wline = NULL;
4043 		}
4044 		if (s->lineno == view->hiline) {
4045 			/* highlight full gline length */
4046 			while (width++ < view->ncols)
4047 				waddch(view->window, ' ');
4048 		} else {
4049 			if (width <= view->ncols - 1)
4050 				waddch(view->window, '\n');
4051 		}
4052 		if (attr)
4053 			wattroff(view->window, attr);
4054 		if (++nprinted == 1)
4055 			s->first_displayed_line = s->lineno;
4056 	}
4057 	free(line);
4058 	if (nprinted >= 1)
4059 		s->last_displayed_line = s->first_displayed_line +
4060 		    (nprinted - 1);
4061 	else
4062 		s->last_displayed_line = s->first_displayed_line;
4063 
4064 	view_border(view);
4065 
4066 	if (s->eof) {
4067 		while (nprinted < view->nlines) {
4068 			waddch(view->window, '\n');
4069 			nprinted++;
4070 		}
4071 
4072 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
4073 		    view->ncols, 0, 0);
4074 		if (err) {
4075 			return err;
4076 		}
4077 
4078 		wstandout(view->window);
4079 		waddwstr(view->window, wline);
4080 		free(wline);
4081 		wline = NULL;
4082 		wstandend(view->window);
4083 	}
4084 
4085 	return NULL;
4086 }
4087 
4088 static char *
4089 get_datestr(time_t *time, char *datebuf)
4090 {
4091 	struct tm mytm, *tm;
4092 	char *p, *s;
4093 
4094 	tm = gmtime_r(time, &mytm);
4095 	if (tm == NULL)
4096 		return NULL;
4097 	s = asctime_r(tm, datebuf);
4098 	if (s == NULL)
4099 		return NULL;
4100 	p = strchr(s, '\n');
4101 	if (p)
4102 		*p = '\0';
4103 	return s;
4104 }
4105 
4106 static const struct got_error *
4107 get_changed_paths(struct got_pathlist_head *paths,
4108     struct got_commit_object *commit, struct got_repository *repo)
4109 {
4110 	const struct got_error *err = NULL;
4111 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
4112 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
4113 	struct got_object_qid *qid;
4114 
4115 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
4116 	if (qid != NULL) {
4117 		struct got_commit_object *pcommit;
4118 		err = got_object_open_as_commit(&pcommit, repo,
4119 		    &qid->id);
4120 		if (err)
4121 			return err;
4122 
4123 		tree_id1 = got_object_id_dup(
4124 		    got_object_commit_get_tree_id(pcommit));
4125 		if (tree_id1 == NULL) {
4126 			got_object_commit_close(pcommit);
4127 			return got_error_from_errno("got_object_id_dup");
4128 		}
4129 		got_object_commit_close(pcommit);
4130 
4131 	}
4132 
4133 	if (tree_id1) {
4134 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
4135 		if (err)
4136 			goto done;
4137 	}
4138 
4139 	tree_id2 = got_object_commit_get_tree_id(commit);
4140 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
4141 	if (err)
4142 		goto done;
4143 
4144 	err = got_diff_tree(tree1, tree2, NULL, NULL, -1, -1, "", "", repo,
4145 	    got_diff_tree_collect_changed_paths, paths, 0);
4146 done:
4147 	if (tree1)
4148 		got_object_tree_close(tree1);
4149 	if (tree2)
4150 		got_object_tree_close(tree2);
4151 	free(tree_id1);
4152 	return err;
4153 }
4154 
4155 static const struct got_error *
4156 add_line_metadata(struct got_diff_line **lines, size_t *nlines,
4157     off_t off, uint8_t type)
4158 {
4159 	struct got_diff_line *p;
4160 
4161 	p = reallocarray(*lines, *nlines + 1, sizeof(**lines));
4162 	if (p == NULL)
4163 		return got_error_from_errno("reallocarray");
4164 	*lines = p;
4165 	(*lines)[*nlines].offset = off;
4166 	(*lines)[*nlines].type = type;
4167 	(*nlines)++;
4168 
4169 	return NULL;
4170 }
4171 
4172 static const struct got_error *
4173 write_commit_info(struct got_diff_line **lines, size_t *nlines,
4174     struct got_object_id *commit_id, struct got_reflist_head *refs,
4175     struct got_repository *repo, FILE *outfile)
4176 {
4177 	const struct got_error *err = NULL;
4178 	char datebuf[26], *datestr;
4179 	struct got_commit_object *commit;
4180 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
4181 	time_t committer_time;
4182 	const char *author, *committer;
4183 	char *refs_str = NULL;
4184 	struct got_pathlist_head changed_paths;
4185 	struct got_pathlist_entry *pe;
4186 	off_t outoff = 0;
4187 	int n;
4188 
4189 	TAILQ_INIT(&changed_paths);
4190 
4191 	if (refs) {
4192 		err = build_refs_str(&refs_str, refs, commit_id, repo);
4193 		if (err)
4194 			return err;
4195 	}
4196 
4197 	err = got_object_open_as_commit(&commit, repo, commit_id);
4198 	if (err)
4199 		return err;
4200 
4201 	err = got_object_id_str(&id_str, commit_id);
4202 	if (err) {
4203 		err = got_error_from_errno("got_object_id_str");
4204 		goto done;
4205 	}
4206 
4207 	err = add_line_metadata(lines, nlines, 0, GOT_DIFF_LINE_NONE);
4208 	if (err)
4209 		goto done;
4210 
4211 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
4212 	    refs_str ? refs_str : "", refs_str ? ")" : "");
4213 	if (n < 0) {
4214 		err = got_error_from_errno("fprintf");
4215 		goto done;
4216 	}
4217 	outoff += n;
4218 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_META);
4219 	if (err)
4220 		goto done;
4221 
4222 	n = fprintf(outfile, "from: %s\n",
4223 	    got_object_commit_get_author(commit));
4224 	if (n < 0) {
4225 		err = got_error_from_errno("fprintf");
4226 		goto done;
4227 	}
4228 	outoff += n;
4229 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_AUTHOR);
4230 	if (err)
4231 		goto done;
4232 
4233 	committer_time = got_object_commit_get_committer_time(commit);
4234 	datestr = get_datestr(&committer_time, datebuf);
4235 	if (datestr) {
4236 		n = fprintf(outfile, "date: %s UTC\n", datestr);
4237 		if (n < 0) {
4238 			err = got_error_from_errno("fprintf");
4239 			goto done;
4240 		}
4241 		outoff += n;
4242 		err = add_line_metadata(lines, nlines, outoff,
4243 		    GOT_DIFF_LINE_DATE);
4244 		if (err)
4245 			goto done;
4246 	}
4247 	author = got_object_commit_get_author(commit);
4248 	committer = got_object_commit_get_committer(commit);
4249 	if (strcmp(author, committer) != 0) {
4250 		n = fprintf(outfile, "via: %s\n", committer);
4251 		if (n < 0) {
4252 			err = got_error_from_errno("fprintf");
4253 			goto done;
4254 		}
4255 		outoff += n;
4256 		err = add_line_metadata(lines, nlines, outoff,
4257 		    GOT_DIFF_LINE_AUTHOR);
4258 		if (err)
4259 			goto done;
4260 	}
4261 	if (got_object_commit_get_nparents(commit) > 1) {
4262 		const struct got_object_id_queue *parent_ids;
4263 		struct got_object_qid *qid;
4264 		int pn = 1;
4265 		parent_ids = got_object_commit_get_parent_ids(commit);
4266 		STAILQ_FOREACH(qid, parent_ids, entry) {
4267 			err = got_object_id_str(&id_str, &qid->id);
4268 			if (err)
4269 				goto done;
4270 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
4271 			if (n < 0) {
4272 				err = got_error_from_errno("fprintf");
4273 				goto done;
4274 			}
4275 			outoff += n;
4276 			err = add_line_metadata(lines, nlines, outoff,
4277 			    GOT_DIFF_LINE_META);
4278 			if (err)
4279 				goto done;
4280 			free(id_str);
4281 			id_str = NULL;
4282 		}
4283 	}
4284 
4285 	err = got_object_commit_get_logmsg(&logmsg, commit);
4286 	if (err)
4287 		goto done;
4288 	s = logmsg;
4289 	while ((line = strsep(&s, "\n")) != NULL) {
4290 		n = fprintf(outfile, "%s\n", line);
4291 		if (n < 0) {
4292 			err = got_error_from_errno("fprintf");
4293 			goto done;
4294 		}
4295 		outoff += n;
4296 		err = add_line_metadata(lines, nlines, outoff,
4297 		    GOT_DIFF_LINE_LOGMSG);
4298 		if (err)
4299 			goto done;
4300 	}
4301 
4302 	err = get_changed_paths(&changed_paths, commit, repo);
4303 	if (err)
4304 		goto done;
4305 	TAILQ_FOREACH(pe, &changed_paths, entry) {
4306 		struct got_diff_changed_path *cp = pe->data;
4307 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
4308 		if (n < 0) {
4309 			err = got_error_from_errno("fprintf");
4310 			goto done;
4311 		}
4312 		outoff += n;
4313 		err = add_line_metadata(lines, nlines, outoff,
4314 		    GOT_DIFF_LINE_CHANGES);
4315 		if (err)
4316 			goto done;
4317 		free((char *)pe->path);
4318 		free(pe->data);
4319 	}
4320 
4321 	fputc('\n', outfile);
4322 	outoff++;
4323 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
4324 done:
4325 	got_pathlist_free(&changed_paths);
4326 	free(id_str);
4327 	free(logmsg);
4328 	free(refs_str);
4329 	got_object_commit_close(commit);
4330 	if (err) {
4331 		free(*lines);
4332 		*lines = NULL;
4333 		*nlines = 0;
4334 	}
4335 	return err;
4336 }
4337 
4338 static const struct got_error *
4339 create_diff(struct tog_diff_view_state *s)
4340 {
4341 	const struct got_error *err = NULL;
4342 	FILE *f = NULL;
4343 	int obj_type;
4344 
4345 	free(s->lines);
4346 	s->lines = malloc(sizeof(*s->lines));
4347 	if (s->lines == NULL)
4348 		return got_error_from_errno("malloc");
4349 	s->nlines = 0;
4350 
4351 	f = got_opentemp();
4352 	if (f == NULL) {
4353 		err = got_error_from_errno("got_opentemp");
4354 		goto done;
4355 	}
4356 	if (s->f && fclose(s->f) == EOF) {
4357 		err = got_error_from_errno("fclose");
4358 		goto done;
4359 	}
4360 	s->f = f;
4361 
4362 	if (s->id1)
4363 		err = got_object_get_type(&obj_type, s->repo, s->id1);
4364 	else
4365 		err = got_object_get_type(&obj_type, s->repo, s->id2);
4366 	if (err)
4367 		goto done;
4368 
4369 	switch (obj_type) {
4370 	case GOT_OBJ_TYPE_BLOB:
4371 		err = got_diff_objects_as_blobs(&s->lines, &s->nlines,
4372 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
4373 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
4374 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
4375 		break;
4376 	case GOT_OBJ_TYPE_TREE:
4377 		err = got_diff_objects_as_trees(&s->lines, &s->nlines,
4378 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
4379 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4380 		    s->force_text_diff, s->repo, s->f);
4381 		break;
4382 	case GOT_OBJ_TYPE_COMMIT: {
4383 		const struct got_object_id_queue *parent_ids;
4384 		struct got_object_qid *pid;
4385 		struct got_commit_object *commit2;
4386 		struct got_reflist_head *refs;
4387 
4388 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
4389 		if (err)
4390 			goto done;
4391 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
4392 		/* Show commit info if we're diffing to a parent/root commit. */
4393 		if (s->id1 == NULL) {
4394 			err = write_commit_info(&s->lines, &s->nlines, s->id2,
4395 			    refs, s->repo, s->f);
4396 			if (err)
4397 				goto done;
4398 		} else {
4399 			parent_ids = got_object_commit_get_parent_ids(commit2);
4400 			STAILQ_FOREACH(pid, parent_ids, entry) {
4401 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
4402 					err = write_commit_info(&s->lines,
4403 					    &s->nlines, s->id2, refs, s->repo,
4404 					    s->f);
4405 					if (err)
4406 						goto done;
4407 					break;
4408 				}
4409 			}
4410 		}
4411 		got_object_commit_close(commit2);
4412 
4413 		err = got_diff_objects_as_commits(&s->lines, &s->nlines,
4414 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
4415 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4416 		    s->force_text_diff, s->repo, s->f);
4417 		break;
4418 	}
4419 	default:
4420 		err = got_error(GOT_ERR_OBJ_TYPE);
4421 		break;
4422 	}
4423 done:
4424 	if (s->f && fflush(s->f) != 0 && err == NULL)
4425 		err = got_error_from_errno("fflush");
4426 	return err;
4427 }
4428 
4429 static void
4430 diff_view_indicate_progress(struct tog_view *view)
4431 {
4432 	mvwaddstr(view->window, 0, 0, "diffing...");
4433 	update_panels();
4434 	doupdate();
4435 }
4436 
4437 static const struct got_error *
4438 search_start_diff_view(struct tog_view *view)
4439 {
4440 	struct tog_diff_view_state *s = &view->state.diff;
4441 
4442 	s->matched_line = 0;
4443 	return NULL;
4444 }
4445 
4446 static const struct got_error *
4447 search_next_diff_view(struct tog_view *view)
4448 {
4449 	struct tog_diff_view_state *s = &view->state.diff;
4450 	const struct got_error *err = NULL;
4451 	int lineno;
4452 	char *line = NULL;
4453 	size_t linesize = 0;
4454 	ssize_t linelen;
4455 
4456 	if (!view->searching) {
4457 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4458 		return NULL;
4459 	}
4460 
4461 	if (s->matched_line) {
4462 		if (view->searching == TOG_SEARCH_FORWARD)
4463 			lineno = s->matched_line + 1;
4464 		else
4465 			lineno = s->matched_line - 1;
4466 	} else
4467 		lineno = s->first_displayed_line;
4468 
4469 	while (1) {
4470 		off_t offset;
4471 
4472 		if (lineno <= 0 || lineno > s->nlines) {
4473 			if (s->matched_line == 0) {
4474 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4475 				break;
4476 			}
4477 
4478 			if (view->searching == TOG_SEARCH_FORWARD)
4479 				lineno = 1;
4480 			else
4481 				lineno = s->nlines;
4482 		}
4483 
4484 		offset = s->lines[lineno - 1].offset;
4485 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
4486 			free(line);
4487 			return got_error_from_errno("fseeko");
4488 		}
4489 		linelen = getline(&line, &linesize, s->f);
4490 		if (linelen != -1) {
4491 			char *exstr;
4492 			err = expand_tab(&exstr, line);
4493 			if (err)
4494 				break;
4495 			if (match_line(exstr, &view->regex, 1,
4496 			    &view->regmatch)) {
4497 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4498 				s->matched_line = lineno;
4499 				free(exstr);
4500 				break;
4501 			}
4502 			free(exstr);
4503 		}
4504 		if (view->searching == TOG_SEARCH_FORWARD)
4505 			lineno++;
4506 		else
4507 			lineno--;
4508 	}
4509 	free(line);
4510 
4511 	if (s->matched_line) {
4512 		s->first_displayed_line = s->matched_line;
4513 		s->selected_line = 1;
4514 	}
4515 
4516 	return err;
4517 }
4518 
4519 static const struct got_error *
4520 close_diff_view(struct tog_view *view)
4521 {
4522 	const struct got_error *err = NULL;
4523 	struct tog_diff_view_state *s = &view->state.diff;
4524 
4525 	free(s->id1);
4526 	s->id1 = NULL;
4527 	free(s->id2);
4528 	s->id2 = NULL;
4529 	if (s->f && fclose(s->f) == EOF)
4530 		err = got_error_from_errno("fclose");
4531 	s->f = NULL;
4532 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
4533 		err = got_error_from_errno("fclose");
4534 	s->f1 = NULL;
4535 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
4536 		err = got_error_from_errno("fclose");
4537 	s->f2 = NULL;
4538 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
4539 		err = got_error_from_errno("close");
4540 	s->fd1 = -1;
4541 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
4542 		err = got_error_from_errno("close");
4543 	s->fd2 = -1;
4544 	free(s->lines);
4545 	s->lines = NULL;
4546 	s->nlines = 0;
4547 	return err;
4548 }
4549 
4550 static const struct got_error *
4551 open_diff_view(struct tog_view *view, struct got_object_id *id1,
4552     struct got_object_id *id2, const char *label1, const char *label2,
4553     int diff_context, int ignore_whitespace, int force_text_diff,
4554     struct tog_view *parent_view, struct got_repository *repo)
4555 {
4556 	const struct got_error *err;
4557 	struct tog_diff_view_state *s = &view->state.diff;
4558 
4559 	memset(s, 0, sizeof(*s));
4560 	s->fd1 = -1;
4561 	s->fd2 = -1;
4562 
4563 	if (id1 != NULL && id2 != NULL) {
4564 	    int type1, type2;
4565 	    err = got_object_get_type(&type1, repo, id1);
4566 	    if (err)
4567 		return err;
4568 	    err = got_object_get_type(&type2, repo, id2);
4569 	    if (err)
4570 		return err;
4571 
4572 	    if (type1 != type2)
4573 		return got_error(GOT_ERR_OBJ_TYPE);
4574 	}
4575 	s->first_displayed_line = 1;
4576 	s->last_displayed_line = view->nlines;
4577 	s->selected_line = 1;
4578 	s->repo = repo;
4579 	s->id1 = id1;
4580 	s->id2 = id2;
4581 	s->label1 = label1;
4582 	s->label2 = label2;
4583 
4584 	if (id1) {
4585 		s->id1 = got_object_id_dup(id1);
4586 		if (s->id1 == NULL)
4587 			return got_error_from_errno("got_object_id_dup");
4588 	} else
4589 		s->id1 = NULL;
4590 
4591 	s->id2 = got_object_id_dup(id2);
4592 	if (s->id2 == NULL) {
4593 		err = got_error_from_errno("got_object_id_dup");
4594 		goto done;
4595 	}
4596 
4597 	s->f1 = got_opentemp();
4598 	if (s->f1 == NULL) {
4599 		err = got_error_from_errno("got_opentemp");
4600 		goto done;
4601 	}
4602 
4603 	s->f2 = got_opentemp();
4604 	if (s->f2 == NULL) {
4605 		err = got_error_from_errno("got_opentemp");
4606 		goto done;
4607 	}
4608 
4609 	s->fd1 = got_opentempfd();
4610 	if (s->fd1 == -1) {
4611 		err = got_error_from_errno("got_opentempfd");
4612 		goto done;
4613 	}
4614 
4615 	s->fd2 = got_opentempfd();
4616 	if (s->fd2 == -1) {
4617 		err = got_error_from_errno("got_opentempfd");
4618 		goto done;
4619 	}
4620 
4621 	s->first_displayed_line = 1;
4622 	s->last_displayed_line = view->nlines;
4623 	s->diff_context = diff_context;
4624 	s->ignore_whitespace = ignore_whitespace;
4625 	s->force_text_diff = force_text_diff;
4626 	s->parent_view = parent_view;
4627 	s->repo = repo;
4628 
4629 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4630 		int rc;
4631 
4632 		rc = init_pair(GOT_DIFF_LINE_MINUS,
4633 		    get_color_value("TOG_COLOR_DIFF_MINUS"), -1);
4634 		if (rc != ERR)
4635 			rc = init_pair(GOT_DIFF_LINE_PLUS,
4636 			    get_color_value("TOG_COLOR_DIFF_PLUS"), -1);
4637 		if (rc != ERR)
4638 			rc = init_pair(GOT_DIFF_LINE_HUNK,
4639 			    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"), -1);
4640 		if (rc != ERR)
4641 			rc = init_pair(GOT_DIFF_LINE_META,
4642 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4643 		if (rc != ERR)
4644 			rc = init_pair(GOT_DIFF_LINE_CHANGES,
4645 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4646 		if (rc != ERR)
4647 			rc = init_pair(GOT_DIFF_LINE_BLOB_MIN,
4648 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4649 		if (rc != ERR)
4650 			rc = init_pair(GOT_DIFF_LINE_BLOB_PLUS,
4651 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4652 		if (rc != ERR)
4653 			rc = init_pair(GOT_DIFF_LINE_AUTHOR,
4654 			    get_color_value("TOG_COLOR_AUTHOR"), -1);
4655 		if (rc != ERR)
4656 			rc = init_pair(GOT_DIFF_LINE_DATE,
4657 			    get_color_value("TOG_COLOR_DATE"), -1);
4658 		if (rc == ERR) {
4659 			err = got_error(GOT_ERR_RANGE);
4660 			goto done;
4661 		}
4662 	}
4663 
4664 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
4665 	    view_is_splitscreen(view))
4666 		show_log_view(parent_view); /* draw border */
4667 	diff_view_indicate_progress(view);
4668 
4669 	err = create_diff(s);
4670 
4671 	view->show = show_diff_view;
4672 	view->input = input_diff_view;
4673 	view->reset = reset_diff_view;
4674 	view->close = close_diff_view;
4675 	view->search_start = search_start_diff_view;
4676 	view->search_next = search_next_diff_view;
4677 done:
4678 	if (err)
4679 		close_diff_view(view);
4680 	return err;
4681 }
4682 
4683 static const struct got_error *
4684 show_diff_view(struct tog_view *view)
4685 {
4686 	const struct got_error *err;
4687 	struct tog_diff_view_state *s = &view->state.diff;
4688 	char *id_str1 = NULL, *id_str2, *header;
4689 	const char *label1, *label2;
4690 
4691 	if (s->id1) {
4692 		err = got_object_id_str(&id_str1, s->id1);
4693 		if (err)
4694 			return err;
4695 		label1 = s->label1 ? : id_str1;
4696 	} else
4697 		label1 = "/dev/null";
4698 
4699 	err = got_object_id_str(&id_str2, s->id2);
4700 	if (err)
4701 		return err;
4702 	label2 = s->label2 ? : id_str2;
4703 
4704 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4705 		err = got_error_from_errno("asprintf");
4706 		free(id_str1);
4707 		free(id_str2);
4708 		return err;
4709 	}
4710 	free(id_str1);
4711 	free(id_str2);
4712 
4713 	err = draw_file(view, header);
4714 	free(header);
4715 	return err;
4716 }
4717 
4718 static const struct got_error *
4719 set_selected_commit(struct tog_diff_view_state *s,
4720     struct commit_queue_entry *entry)
4721 {
4722 	const struct got_error *err;
4723 	const struct got_object_id_queue *parent_ids;
4724 	struct got_commit_object *selected_commit;
4725 	struct got_object_qid *pid;
4726 
4727 	free(s->id2);
4728 	s->id2 = got_object_id_dup(entry->id);
4729 	if (s->id2 == NULL)
4730 		return got_error_from_errno("got_object_id_dup");
4731 
4732 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4733 	if (err)
4734 		return err;
4735 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4736 	free(s->id1);
4737 	pid = STAILQ_FIRST(parent_ids);
4738 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4739 	got_object_commit_close(selected_commit);
4740 	return NULL;
4741 }
4742 
4743 static const struct got_error *
4744 reset_diff_view(struct tog_view *view)
4745 {
4746 	struct tog_diff_view_state *s = &view->state.diff;
4747 
4748 	view->count = 0;
4749 	wclear(view->window);
4750 	s->first_displayed_line = 1;
4751 	s->last_displayed_line = view->nlines;
4752 	s->matched_line = 0;
4753 	diff_view_indicate_progress(view);
4754 	return create_diff(s);
4755 }
4756 
4757 static void
4758 diff_prev_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4759 {
4760 	int start, i;
4761 
4762 	i = start = s->first_displayed_line - 1;
4763 
4764 	while (s->lines[i].type != type) {
4765 		if (i == 0)
4766 			i = s->nlines - 1;
4767 		if (--i == start)
4768 			return; /* do nothing, requested type not in file */
4769 	}
4770 
4771 	s->selected_line = 1;
4772 	s->first_displayed_line = i;
4773 }
4774 
4775 static void
4776 diff_next_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4777 {
4778 	int start, i;
4779 
4780 	i = start = s->first_displayed_line + 1;
4781 
4782 	while (s->lines[i].type != type) {
4783 		if (i == s->nlines - 1)
4784 			i = 0;
4785 		if (++i == start)
4786 			return; /* do nothing, requested type not in file */
4787 	}
4788 
4789 	s->selected_line = 1;
4790 	s->first_displayed_line = i;
4791 }
4792 
4793 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
4794     int, int, int);
4795 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
4796     int, int);
4797 
4798 static const struct got_error *
4799 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4800 {
4801 	const struct got_error *err = NULL;
4802 	struct tog_diff_view_state *s = &view->state.diff;
4803 	struct tog_log_view_state *ls;
4804 	struct commit_queue_entry *old_selected_entry;
4805 	char *line = NULL;
4806 	size_t linesize = 0;
4807 	ssize_t linelen;
4808 	int i, nscroll = view->nlines - 1, up = 0;
4809 
4810 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
4811 
4812 	switch (ch) {
4813 	case '0':
4814 		view->x = 0;
4815 		break;
4816 	case '$':
4817 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4818 		view->count = 0;
4819 		break;
4820 	case KEY_RIGHT:
4821 	case 'l':
4822 		if (view->x + view->ncols / 3 < view->maxx)
4823 			view->x += 2;  /* move two columns right */
4824 		else
4825 			view->count = 0;
4826 		break;
4827 	case KEY_LEFT:
4828 	case 'h':
4829 		view->x -= MIN(view->x, 2);  /* move two columns back */
4830 		if (view->x <= 0)
4831 			view->count = 0;
4832 		break;
4833 	case 'a':
4834 	case 'w':
4835 		if (ch == 'a')
4836 			s->force_text_diff = !s->force_text_diff;
4837 		if (ch == 'w')
4838 			s->ignore_whitespace = !s->ignore_whitespace;
4839 		err = reset_diff_view(view);
4840 		break;
4841 	case 'g':
4842 	case KEY_HOME:
4843 		s->first_displayed_line = 1;
4844 		view->count = 0;
4845 		break;
4846 	case 'G':
4847 	case KEY_END:
4848 		view->count = 0;
4849 		if (s->eof)
4850 			break;
4851 
4852 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4853 		s->eof = 1;
4854 		break;
4855 	case 'k':
4856 	case KEY_UP:
4857 	case CTRL('p'):
4858 		if (s->first_displayed_line > 1)
4859 			s->first_displayed_line--;
4860 		else
4861 			view->count = 0;
4862 		break;
4863 	case CTRL('u'):
4864 	case 'u':
4865 		nscroll /= 2;
4866 		/* FALL THROUGH */
4867 	case KEY_PPAGE:
4868 	case CTRL('b'):
4869 	case 'b':
4870 		if (s->first_displayed_line == 1) {
4871 			view->count = 0;
4872 			break;
4873 		}
4874 		i = 0;
4875 		while (i++ < nscroll && s->first_displayed_line > 1)
4876 			s->first_displayed_line--;
4877 		break;
4878 	case 'j':
4879 	case KEY_DOWN:
4880 	case CTRL('n'):
4881 		if (!s->eof)
4882 			s->first_displayed_line++;
4883 		else
4884 			view->count = 0;
4885 		break;
4886 	case CTRL('d'):
4887 	case 'd':
4888 		nscroll /= 2;
4889 		/* FALL THROUGH */
4890 	case KEY_NPAGE:
4891 	case CTRL('f'):
4892 	case 'f':
4893 	case ' ':
4894 		if (s->eof) {
4895 			view->count = 0;
4896 			break;
4897 		}
4898 		i = 0;
4899 		while (!s->eof && i++ < nscroll) {
4900 			linelen = getline(&line, &linesize, s->f);
4901 			s->first_displayed_line++;
4902 			if (linelen == -1) {
4903 				if (feof(s->f)) {
4904 					s->eof = 1;
4905 				} else
4906 					err = got_ferror(s->f, GOT_ERR_IO);
4907 				break;
4908 			}
4909 		}
4910 		free(line);
4911 		break;
4912 	case '(':
4913 		diff_prev_index(s, GOT_DIFF_LINE_BLOB_MIN);
4914 		break;
4915 	case ')':
4916 		diff_next_index(s, GOT_DIFF_LINE_BLOB_MIN);
4917 		break;
4918 	case '{':
4919 		diff_prev_index(s, GOT_DIFF_LINE_HUNK);
4920 		break;
4921 	case '}':
4922 		diff_next_index(s, GOT_DIFF_LINE_HUNK);
4923 		break;
4924 	case '[':
4925 		if (s->diff_context > 0) {
4926 			s->diff_context--;
4927 			s->matched_line = 0;
4928 			diff_view_indicate_progress(view);
4929 			err = create_diff(s);
4930 			if (s->first_displayed_line + view->nlines - 1 >
4931 			    s->nlines) {
4932 				s->first_displayed_line = 1;
4933 				s->last_displayed_line = view->nlines;
4934 			}
4935 		} else
4936 			view->count = 0;
4937 		break;
4938 	case ']':
4939 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4940 			s->diff_context++;
4941 			s->matched_line = 0;
4942 			diff_view_indicate_progress(view);
4943 			err = create_diff(s);
4944 		} else
4945 			view->count = 0;
4946 		break;
4947 	case '<':
4948 	case ',':
4949 	case 'K':
4950 		up = 1;
4951 		/* FALL THROUGH */
4952 	case '>':
4953 	case '.':
4954 	case 'J':
4955 		if (s->parent_view == NULL) {
4956 			view->count = 0;
4957 			break;
4958 		}
4959 		s->parent_view->count = view->count;
4960 
4961 		if (s->parent_view->type == TOG_VIEW_LOG) {
4962 			ls = &s->parent_view->state.log;
4963 			old_selected_entry = ls->selected_entry;
4964 
4965 			err = input_log_view(NULL, s->parent_view,
4966 			    up ? KEY_UP : KEY_DOWN);
4967 			if (err)
4968 				break;
4969 			view->count = s->parent_view->count;
4970 
4971 			if (old_selected_entry == ls->selected_entry)
4972 				break;
4973 
4974 			err = set_selected_commit(s, ls->selected_entry);
4975 			if (err)
4976 				break;
4977 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
4978 			struct tog_blame_view_state *bs;
4979 			struct got_object_id *id, *prev_id;
4980 
4981 			bs = &s->parent_view->state.blame;
4982 			prev_id = get_annotation_for_line(bs->blame.lines,
4983 			    bs->blame.nlines, bs->last_diffed_line);
4984 
4985 			err = input_blame_view(&view, s->parent_view,
4986 			    up ? KEY_UP : KEY_DOWN);
4987 			if (err)
4988 				break;
4989 			view->count = s->parent_view->count;
4990 
4991 			if (prev_id == NULL)
4992 				break;
4993 			id = get_selected_commit_id(bs->blame.lines,
4994 			    bs->blame.nlines, bs->first_displayed_line,
4995 			    bs->selected_line);
4996 			if (id == NULL)
4997 				break;
4998 
4999 			if (!got_object_id_cmp(prev_id, id))
5000 				break;
5001 
5002 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
5003 			if (err)
5004 				break;
5005 		}
5006 		s->first_displayed_line = 1;
5007 		s->last_displayed_line = view->nlines;
5008 		s->matched_line = 0;
5009 		view->x = 0;
5010 
5011 		diff_view_indicate_progress(view);
5012 		err = create_diff(s);
5013 		break;
5014 	default:
5015 		view->count = 0;
5016 		break;
5017 	}
5018 
5019 	return err;
5020 }
5021 
5022 static const struct got_error *
5023 cmd_diff(int argc, char *argv[])
5024 {
5025 	const struct got_error *error = NULL;
5026 	struct got_repository *repo = NULL;
5027 	struct got_worktree *worktree = NULL;
5028 	struct got_object_id *id1 = NULL, *id2 = NULL;
5029 	char *repo_path = NULL, *cwd = NULL;
5030 	char *id_str1 = NULL, *id_str2 = NULL;
5031 	char *label1 = NULL, *label2 = NULL;
5032 	int diff_context = 3, ignore_whitespace = 0;
5033 	int ch, force_text_diff = 0;
5034 	const char *errstr;
5035 	struct tog_view *view;
5036 	int *pack_fds = NULL;
5037 
5038 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
5039 		switch (ch) {
5040 		case 'a':
5041 			force_text_diff = 1;
5042 			break;
5043 		case 'C':
5044 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
5045 			    &errstr);
5046 			if (errstr != NULL)
5047 				errx(1, "number of context lines is %s: %s",
5048 				    errstr, errstr);
5049 			break;
5050 		case 'r':
5051 			repo_path = realpath(optarg, NULL);
5052 			if (repo_path == NULL)
5053 				return got_error_from_errno2("realpath",
5054 				    optarg);
5055 			got_path_strip_trailing_slashes(repo_path);
5056 			break;
5057 		case 'w':
5058 			ignore_whitespace = 1;
5059 			break;
5060 		default:
5061 			usage_diff();
5062 			/* NOTREACHED */
5063 		}
5064 	}
5065 
5066 	argc -= optind;
5067 	argv += optind;
5068 
5069 	if (argc == 0) {
5070 		usage_diff(); /* TODO show local worktree changes */
5071 	} else if (argc == 2) {
5072 		id_str1 = argv[0];
5073 		id_str2 = argv[1];
5074 	} else
5075 		usage_diff();
5076 
5077 	error = got_repo_pack_fds_open(&pack_fds);
5078 	if (error)
5079 		goto done;
5080 
5081 	if (repo_path == NULL) {
5082 		cwd = getcwd(NULL, 0);
5083 		if (cwd == NULL)
5084 			return got_error_from_errno("getcwd");
5085 		error = got_worktree_open(&worktree, cwd);
5086 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5087 			goto done;
5088 		if (worktree)
5089 			repo_path =
5090 			    strdup(got_worktree_get_repo_path(worktree));
5091 		else
5092 			repo_path = strdup(cwd);
5093 		if (repo_path == NULL) {
5094 			error = got_error_from_errno("strdup");
5095 			goto done;
5096 		}
5097 	}
5098 
5099 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5100 	if (error)
5101 		goto done;
5102 
5103 	init_curses();
5104 
5105 	error = apply_unveil(got_repo_get_path(repo), NULL);
5106 	if (error)
5107 		goto done;
5108 
5109 	error = tog_load_refs(repo, 0);
5110 	if (error)
5111 		goto done;
5112 
5113 	error = got_repo_match_object_id(&id1, &label1, id_str1,
5114 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5115 	if (error)
5116 		goto done;
5117 
5118 	error = got_repo_match_object_id(&id2, &label2, id_str2,
5119 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5120 	if (error)
5121 		goto done;
5122 
5123 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
5124 	if (view == NULL) {
5125 		error = got_error_from_errno("view_open");
5126 		goto done;
5127 	}
5128 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
5129 	    ignore_whitespace, force_text_diff, NULL,  repo);
5130 	if (error)
5131 		goto done;
5132 	error = view_loop(view);
5133 done:
5134 	free(label1);
5135 	free(label2);
5136 	free(repo_path);
5137 	free(cwd);
5138 	if (repo) {
5139 		const struct got_error *close_err = got_repo_close(repo);
5140 		if (error == NULL)
5141 			error = close_err;
5142 	}
5143 	if (worktree)
5144 		got_worktree_close(worktree);
5145 	if (pack_fds) {
5146 		const struct got_error *pack_err =
5147 		    got_repo_pack_fds_close(pack_fds);
5148 		if (error == NULL)
5149 			error = pack_err;
5150 	}
5151 	tog_free_refs();
5152 	return error;
5153 }
5154 
5155 __dead static void
5156 usage_blame(void)
5157 {
5158 	endwin();
5159 	fprintf(stderr,
5160 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
5161 	    getprogname());
5162 	exit(1);
5163 }
5164 
5165 struct tog_blame_line {
5166 	int annotated;
5167 	struct got_object_id *id;
5168 };
5169 
5170 static const struct got_error *
5171 draw_blame(struct tog_view *view)
5172 {
5173 	struct tog_blame_view_state *s = &view->state.blame;
5174 	struct tog_blame *blame = &s->blame;
5175 	regmatch_t *regmatch = &view->regmatch;
5176 	const struct got_error *err;
5177 	int lineno = 0, nprinted = 0;
5178 	char *line = NULL;
5179 	size_t linesize = 0;
5180 	ssize_t linelen;
5181 	wchar_t *wline;
5182 	int width;
5183 	struct tog_blame_line *blame_line;
5184 	struct got_object_id *prev_id = NULL;
5185 	char *id_str;
5186 	struct tog_color *tc;
5187 
5188 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
5189 	if (err)
5190 		return err;
5191 
5192 	rewind(blame->f);
5193 	werase(view->window);
5194 
5195 	if (asprintf(&line, "commit %s", id_str) == -1) {
5196 		err = got_error_from_errno("asprintf");
5197 		free(id_str);
5198 		return err;
5199 	}
5200 
5201 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5202 	free(line);
5203 	line = NULL;
5204 	if (err)
5205 		return err;
5206 	if (view_needs_focus_indication(view))
5207 		wstandout(view->window);
5208 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5209 	if (tc)
5210 		wattr_on(view->window,
5211 		    COLOR_PAIR(tc->colorpair), NULL);
5212 	waddwstr(view->window, wline);
5213 	if (tc)
5214 		wattr_off(view->window,
5215 		    COLOR_PAIR(tc->colorpair), NULL);
5216 	if (view_needs_focus_indication(view))
5217 		wstandend(view->window);
5218 	free(wline);
5219 	wline = NULL;
5220 	if (width < view->ncols - 1)
5221 		waddch(view->window, '\n');
5222 
5223 	if (view->gline > blame->nlines)
5224 		view->gline = blame->nlines;
5225 
5226 	if (asprintf(&line, "[%d/%d] %s%s", view->gline ? view->gline :
5227 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
5228 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
5229 		free(id_str);
5230 		return got_error_from_errno("asprintf");
5231 	}
5232 	free(id_str);
5233 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5234 	free(line);
5235 	line = NULL;
5236 	if (err)
5237 		return err;
5238 	waddwstr(view->window, wline);
5239 	free(wline);
5240 	wline = NULL;
5241 	if (width < view->ncols - 1)
5242 		waddch(view->window, '\n');
5243 
5244 	s->eof = 0;
5245 	view->maxx = 0;
5246 	while (nprinted < view->nlines - 2) {
5247 		linelen = getline(&line, &linesize, blame->f);
5248 		if (linelen == -1) {
5249 			if (feof(blame->f)) {
5250 				s->eof = 1;
5251 				break;
5252 			}
5253 			free(line);
5254 			return got_ferror(blame->f, GOT_ERR_IO);
5255 		}
5256 		if (++lineno < s->first_displayed_line)
5257 			continue;
5258 		if (view->gline && !gotoline(view, &lineno, &nprinted))
5259 			continue;
5260 
5261 		/* Set view->maxx based on full line length. */
5262 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
5263 		if (err) {
5264 			free(line);
5265 			return err;
5266 		}
5267 		free(wline);
5268 		wline = NULL;
5269 		view->maxx = MAX(view->maxx, width);
5270 
5271 		if (nprinted == s->selected_line - 1)
5272 			wstandout(view->window);
5273 
5274 		if (blame->nlines > 0) {
5275 			blame_line = &blame->lines[lineno - 1];
5276 			if (blame_line->annotated && prev_id &&
5277 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
5278 			    !(nprinted == s->selected_line - 1)) {
5279 				waddstr(view->window, "        ");
5280 			} else if (blame_line->annotated) {
5281 				char *id_str;
5282 				err = got_object_id_str(&id_str,
5283 				    blame_line->id);
5284 				if (err) {
5285 					free(line);
5286 					return err;
5287 				}
5288 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5289 				if (tc)
5290 					wattr_on(view->window,
5291 					    COLOR_PAIR(tc->colorpair), NULL);
5292 				wprintw(view->window, "%.8s", id_str);
5293 				if (tc)
5294 					wattr_off(view->window,
5295 					    COLOR_PAIR(tc->colorpair), NULL);
5296 				free(id_str);
5297 				prev_id = blame_line->id;
5298 			} else {
5299 				waddstr(view->window, "........");
5300 				prev_id = NULL;
5301 			}
5302 		} else {
5303 			waddstr(view->window, "........");
5304 			prev_id = NULL;
5305 		}
5306 
5307 		if (nprinted == s->selected_line - 1)
5308 			wstandend(view->window);
5309 		waddstr(view->window, " ");
5310 
5311 		if (view->ncols <= 9) {
5312 			width = 9;
5313 		} else if (s->first_displayed_line + nprinted ==
5314 		    s->matched_line &&
5315 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
5316 			err = add_matched_line(&width, line, view->ncols - 9, 9,
5317 			    view->window, view->x, regmatch);
5318 			if (err) {
5319 				free(line);
5320 				return err;
5321 			}
5322 			width += 9;
5323 		} else {
5324 			int skip;
5325 			err = format_line(&wline, &width, &skip, line,
5326 			    view->x, view->ncols - 9, 9, 1);
5327 			if (err) {
5328 				free(line);
5329 				return err;
5330 			}
5331 			waddwstr(view->window, &wline[skip]);
5332 			width += 9;
5333 			free(wline);
5334 			wline = NULL;
5335 		}
5336 
5337 		if (width <= view->ncols - 1)
5338 			waddch(view->window, '\n');
5339 		if (++nprinted == 1)
5340 			s->first_displayed_line = lineno;
5341 	}
5342 	free(line);
5343 	s->last_displayed_line = lineno;
5344 
5345 	view_border(view);
5346 
5347 	return NULL;
5348 }
5349 
5350 static const struct got_error *
5351 blame_cb(void *arg, int nlines, int lineno,
5352     struct got_commit_object *commit, struct got_object_id *id)
5353 {
5354 	const struct got_error *err = NULL;
5355 	struct tog_blame_cb_args *a = arg;
5356 	struct tog_blame_line *line;
5357 	int errcode;
5358 
5359 	if (nlines != a->nlines ||
5360 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
5361 		return got_error(GOT_ERR_RANGE);
5362 
5363 	errcode = pthread_mutex_lock(&tog_mutex);
5364 	if (errcode)
5365 		return got_error_set_errno(errcode, "pthread_mutex_lock");
5366 
5367 	if (*a->quit) {	/* user has quit the blame view */
5368 		err = got_error(GOT_ERR_ITER_COMPLETED);
5369 		goto done;
5370 	}
5371 
5372 	if (lineno == -1)
5373 		goto done; /* no change in this commit */
5374 
5375 	line = &a->lines[lineno - 1];
5376 	if (line->annotated)
5377 		goto done;
5378 
5379 	line->id = got_object_id_dup(id);
5380 	if (line->id == NULL) {
5381 		err = got_error_from_errno("got_object_id_dup");
5382 		goto done;
5383 	}
5384 	line->annotated = 1;
5385 done:
5386 	errcode = pthread_mutex_unlock(&tog_mutex);
5387 	if (errcode)
5388 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5389 	return err;
5390 }
5391 
5392 static void *
5393 blame_thread(void *arg)
5394 {
5395 	const struct got_error *err, *close_err;
5396 	struct tog_blame_thread_args *ta = arg;
5397 	struct tog_blame_cb_args *a = ta->cb_args;
5398 	int errcode, fd1 = -1, fd2 = -1;
5399 	FILE *f1 = NULL, *f2 = NULL;
5400 
5401 	fd1 = got_opentempfd();
5402 	if (fd1 == -1)
5403 		return (void *)got_error_from_errno("got_opentempfd");
5404 
5405 	fd2 = got_opentempfd();
5406 	if (fd2 == -1) {
5407 		err = got_error_from_errno("got_opentempfd");
5408 		goto done;
5409 	}
5410 
5411 	f1 = got_opentemp();
5412 	if (f1 == NULL) {
5413 		err = (void *)got_error_from_errno("got_opentemp");
5414 		goto done;
5415 	}
5416 	f2 = got_opentemp();
5417 	if (f2 == NULL) {
5418 		err = (void *)got_error_from_errno("got_opentemp");
5419 		goto done;
5420 	}
5421 
5422 	err = block_signals_used_by_main_thread();
5423 	if (err)
5424 		goto done;
5425 
5426 	err = got_blame(ta->path, a->commit_id, ta->repo,
5427 	    tog_diff_algo, blame_cb, ta->cb_args,
5428 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
5429 	if (err && err->code == GOT_ERR_CANCELLED)
5430 		err = NULL;
5431 
5432 	errcode = pthread_mutex_lock(&tog_mutex);
5433 	if (errcode) {
5434 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
5435 		goto done;
5436 	}
5437 
5438 	close_err = got_repo_close(ta->repo);
5439 	if (err == NULL)
5440 		err = close_err;
5441 	ta->repo = NULL;
5442 	*ta->complete = 1;
5443 
5444 	errcode = pthread_mutex_unlock(&tog_mutex);
5445 	if (errcode && err == NULL)
5446 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5447 
5448 done:
5449 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
5450 		err = got_error_from_errno("close");
5451 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
5452 		err = got_error_from_errno("close");
5453 	if (f1 && fclose(f1) == EOF && err == NULL)
5454 		err = got_error_from_errno("fclose");
5455 	if (f2 && fclose(f2) == EOF && err == NULL)
5456 		err = got_error_from_errno("fclose");
5457 
5458 	return (void *)err;
5459 }
5460 
5461 static struct got_object_id *
5462 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
5463     int first_displayed_line, int selected_line)
5464 {
5465 	struct tog_blame_line *line;
5466 
5467 	if (nlines <= 0)
5468 		return NULL;
5469 
5470 	line = &lines[first_displayed_line - 1 + selected_line - 1];
5471 	if (!line->annotated)
5472 		return NULL;
5473 
5474 	return line->id;
5475 }
5476 
5477 static struct got_object_id *
5478 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
5479     int lineno)
5480 {
5481 	struct tog_blame_line *line;
5482 
5483 	if (nlines <= 0 || lineno >= nlines)
5484 		return NULL;
5485 
5486 	line = &lines[lineno - 1];
5487 	if (!line->annotated)
5488 		return NULL;
5489 
5490 	return line->id;
5491 }
5492 
5493 static const struct got_error *
5494 stop_blame(struct tog_blame *blame)
5495 {
5496 	const struct got_error *err = NULL;
5497 	int i;
5498 
5499 	if (blame->thread) {
5500 		int errcode;
5501 		errcode = pthread_mutex_unlock(&tog_mutex);
5502 		if (errcode)
5503 			return got_error_set_errno(errcode,
5504 			    "pthread_mutex_unlock");
5505 		errcode = pthread_join(blame->thread, (void **)&err);
5506 		if (errcode)
5507 			return got_error_set_errno(errcode, "pthread_join");
5508 		errcode = pthread_mutex_lock(&tog_mutex);
5509 		if (errcode)
5510 			return got_error_set_errno(errcode,
5511 			    "pthread_mutex_lock");
5512 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
5513 			err = NULL;
5514 		blame->thread = NULL;
5515 	}
5516 	if (blame->thread_args.repo) {
5517 		const struct got_error *close_err;
5518 		close_err = got_repo_close(blame->thread_args.repo);
5519 		if (err == NULL)
5520 			err = close_err;
5521 		blame->thread_args.repo = NULL;
5522 	}
5523 	if (blame->f) {
5524 		if (fclose(blame->f) == EOF && err == NULL)
5525 			err = got_error_from_errno("fclose");
5526 		blame->f = NULL;
5527 	}
5528 	if (blame->lines) {
5529 		for (i = 0; i < blame->nlines; i++)
5530 			free(blame->lines[i].id);
5531 		free(blame->lines);
5532 		blame->lines = NULL;
5533 	}
5534 	free(blame->cb_args.commit_id);
5535 	blame->cb_args.commit_id = NULL;
5536 	if (blame->pack_fds) {
5537 		const struct got_error *pack_err =
5538 		    got_repo_pack_fds_close(blame->pack_fds);
5539 		if (err == NULL)
5540 			err = pack_err;
5541 		blame->pack_fds = NULL;
5542 	}
5543 	return err;
5544 }
5545 
5546 static const struct got_error *
5547 cancel_blame_view(void *arg)
5548 {
5549 	const struct got_error *err = NULL;
5550 	int *done = arg;
5551 	int errcode;
5552 
5553 	errcode = pthread_mutex_lock(&tog_mutex);
5554 	if (errcode)
5555 		return got_error_set_errno(errcode,
5556 		    "pthread_mutex_unlock");
5557 
5558 	if (*done)
5559 		err = got_error(GOT_ERR_CANCELLED);
5560 
5561 	errcode = pthread_mutex_unlock(&tog_mutex);
5562 	if (errcode)
5563 		return got_error_set_errno(errcode,
5564 		    "pthread_mutex_lock");
5565 
5566 	return err;
5567 }
5568 
5569 static const struct got_error *
5570 run_blame(struct tog_view *view)
5571 {
5572 	struct tog_blame_view_state *s = &view->state.blame;
5573 	struct tog_blame *blame = &s->blame;
5574 	const struct got_error *err = NULL;
5575 	struct got_commit_object *commit = NULL;
5576 	struct got_blob_object *blob = NULL;
5577 	struct got_repository *thread_repo = NULL;
5578 	struct got_object_id *obj_id = NULL;
5579 	int obj_type, fd = -1;
5580 	int *pack_fds = NULL;
5581 
5582 	err = got_object_open_as_commit(&commit, s->repo,
5583 	    &s->blamed_commit->id);
5584 	if (err)
5585 		return err;
5586 
5587 	fd = got_opentempfd();
5588 	if (fd == -1) {
5589 		err = got_error_from_errno("got_opentempfd");
5590 		goto done;
5591 	}
5592 
5593 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
5594 	if (err)
5595 		goto done;
5596 
5597 	err = got_object_get_type(&obj_type, s->repo, obj_id);
5598 	if (err)
5599 		goto done;
5600 
5601 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
5602 		err = got_error(GOT_ERR_OBJ_TYPE);
5603 		goto done;
5604 	}
5605 
5606 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
5607 	if (err)
5608 		goto done;
5609 	blame->f = got_opentemp();
5610 	if (blame->f == NULL) {
5611 		err = got_error_from_errno("got_opentemp");
5612 		goto done;
5613 	}
5614 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
5615 	    &blame->line_offsets, blame->f, blob);
5616 	if (err)
5617 		goto done;
5618 	if (blame->nlines == 0) {
5619 		s->blame_complete = 1;
5620 		goto done;
5621 	}
5622 
5623 	/* Don't include \n at EOF in the blame line count. */
5624 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
5625 		blame->nlines--;
5626 
5627 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
5628 	if (blame->lines == NULL) {
5629 		err = got_error_from_errno("calloc");
5630 		goto done;
5631 	}
5632 
5633 	err = got_repo_pack_fds_open(&pack_fds);
5634 	if (err)
5635 		goto done;
5636 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
5637 	    pack_fds);
5638 	if (err)
5639 		goto done;
5640 
5641 	blame->pack_fds = pack_fds;
5642 	blame->cb_args.view = view;
5643 	blame->cb_args.lines = blame->lines;
5644 	blame->cb_args.nlines = blame->nlines;
5645 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
5646 	if (blame->cb_args.commit_id == NULL) {
5647 		err = got_error_from_errno("got_object_id_dup");
5648 		goto done;
5649 	}
5650 	blame->cb_args.quit = &s->done;
5651 
5652 	blame->thread_args.path = s->path;
5653 	blame->thread_args.repo = thread_repo;
5654 	blame->thread_args.cb_args = &blame->cb_args;
5655 	blame->thread_args.complete = &s->blame_complete;
5656 	blame->thread_args.cancel_cb = cancel_blame_view;
5657 	blame->thread_args.cancel_arg = &s->done;
5658 	s->blame_complete = 0;
5659 
5660 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
5661 		s->first_displayed_line = 1;
5662 		s->last_displayed_line = view->nlines;
5663 		s->selected_line = 1;
5664 	}
5665 	s->matched_line = 0;
5666 
5667 done:
5668 	if (commit)
5669 		got_object_commit_close(commit);
5670 	if (fd != -1 && close(fd) == -1 && err == NULL)
5671 		err = got_error_from_errno("close");
5672 	if (blob)
5673 		got_object_blob_close(blob);
5674 	free(obj_id);
5675 	if (err)
5676 		stop_blame(blame);
5677 	return err;
5678 }
5679 
5680 static const struct got_error *
5681 open_blame_view(struct tog_view *view, char *path,
5682     struct got_object_id *commit_id, struct got_repository *repo)
5683 {
5684 	const struct got_error *err = NULL;
5685 	struct tog_blame_view_state *s = &view->state.blame;
5686 
5687 	STAILQ_INIT(&s->blamed_commits);
5688 
5689 	s->path = strdup(path);
5690 	if (s->path == NULL)
5691 		return got_error_from_errno("strdup");
5692 
5693 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
5694 	if (err) {
5695 		free(s->path);
5696 		return err;
5697 	}
5698 
5699 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
5700 	s->first_displayed_line = 1;
5701 	s->last_displayed_line = view->nlines;
5702 	s->selected_line = 1;
5703 	s->blame_complete = 0;
5704 	s->repo = repo;
5705 	s->commit_id = commit_id;
5706 	memset(&s->blame, 0, sizeof(s->blame));
5707 
5708 	STAILQ_INIT(&s->colors);
5709 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5710 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
5711 		    get_color_value("TOG_COLOR_COMMIT"));
5712 		if (err)
5713 			return err;
5714 	}
5715 
5716 	view->show = show_blame_view;
5717 	view->input = input_blame_view;
5718 	view->reset = reset_blame_view;
5719 	view->close = close_blame_view;
5720 	view->search_start = search_start_blame_view;
5721 	view->search_next = search_next_blame_view;
5722 
5723 	return run_blame(view);
5724 }
5725 
5726 static const struct got_error *
5727 close_blame_view(struct tog_view *view)
5728 {
5729 	const struct got_error *err = NULL;
5730 	struct tog_blame_view_state *s = &view->state.blame;
5731 
5732 	if (s->blame.thread)
5733 		err = stop_blame(&s->blame);
5734 
5735 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
5736 		struct got_object_qid *blamed_commit;
5737 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
5738 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5739 		got_object_qid_free(blamed_commit);
5740 	}
5741 
5742 	free(s->path);
5743 	free_colors(&s->colors);
5744 	return err;
5745 }
5746 
5747 static const struct got_error *
5748 search_start_blame_view(struct tog_view *view)
5749 {
5750 	struct tog_blame_view_state *s = &view->state.blame;
5751 
5752 	s->matched_line = 0;
5753 	return NULL;
5754 }
5755 
5756 static const struct got_error *
5757 search_next_blame_view(struct tog_view *view)
5758 {
5759 	struct tog_blame_view_state *s = &view->state.blame;
5760 	const struct got_error *err = NULL;
5761 	int lineno;
5762 	char *line = NULL;
5763 	size_t linesize = 0;
5764 	ssize_t linelen;
5765 
5766 	if (!view->searching) {
5767 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5768 		return NULL;
5769 	}
5770 
5771 	if (s->matched_line) {
5772 		if (view->searching == TOG_SEARCH_FORWARD)
5773 			lineno = s->matched_line + 1;
5774 		else
5775 			lineno = s->matched_line - 1;
5776 	} else
5777 		lineno = s->first_displayed_line - 1 + s->selected_line;
5778 
5779 	while (1) {
5780 		off_t offset;
5781 
5782 		if (lineno <= 0 || lineno > s->blame.nlines) {
5783 			if (s->matched_line == 0) {
5784 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5785 				break;
5786 			}
5787 
5788 			if (view->searching == TOG_SEARCH_FORWARD)
5789 				lineno = 1;
5790 			else
5791 				lineno = s->blame.nlines;
5792 		}
5793 
5794 		offset = s->blame.line_offsets[lineno - 1];
5795 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5796 			free(line);
5797 			return got_error_from_errno("fseeko");
5798 		}
5799 		linelen = getline(&line, &linesize, s->blame.f);
5800 		if (linelen != -1) {
5801 			char *exstr;
5802 			err = expand_tab(&exstr, line);
5803 			if (err)
5804 				break;
5805 			if (match_line(exstr, &view->regex, 1,
5806 			    &view->regmatch)) {
5807 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5808 				s->matched_line = lineno;
5809 				free(exstr);
5810 				break;
5811 			}
5812 			free(exstr);
5813 		}
5814 		if (view->searching == TOG_SEARCH_FORWARD)
5815 			lineno++;
5816 		else
5817 			lineno--;
5818 	}
5819 	free(line);
5820 
5821 	if (s->matched_line) {
5822 		s->first_displayed_line = s->matched_line;
5823 		s->selected_line = 1;
5824 	}
5825 
5826 	return err;
5827 }
5828 
5829 static const struct got_error *
5830 show_blame_view(struct tog_view *view)
5831 {
5832 	const struct got_error *err = NULL;
5833 	struct tog_blame_view_state *s = &view->state.blame;
5834 	int errcode;
5835 
5836 	if (s->blame.thread == NULL && !s->blame_complete) {
5837 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5838 		    &s->blame.thread_args);
5839 		if (errcode)
5840 			return got_error_set_errno(errcode, "pthread_create");
5841 
5842 		halfdelay(1); /* fast refresh while annotating  */
5843 	}
5844 
5845 	if (s->blame_complete)
5846 		halfdelay(10); /* disable fast refresh */
5847 
5848 	err = draw_blame(view);
5849 
5850 	view_border(view);
5851 	return err;
5852 }
5853 
5854 static const struct got_error *
5855 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
5856     struct got_repository *repo, struct got_object_id *id)
5857 {
5858 	struct tog_view		*log_view;
5859 	const struct got_error	*err = NULL;
5860 
5861 	*new_view = NULL;
5862 
5863 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
5864 	if (log_view == NULL)
5865 		return got_error_from_errno("view_open");
5866 
5867 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0);
5868 	if (err)
5869 		view_close(log_view);
5870 	else
5871 		*new_view = log_view;
5872 
5873 	return err;
5874 }
5875 
5876 static const struct got_error *
5877 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5878 {
5879 	const struct got_error *err = NULL, *thread_err = NULL;
5880 	struct tog_view *diff_view;
5881 	struct tog_blame_view_state *s = &view->state.blame;
5882 	int eos, nscroll, begin_y = 0, begin_x = 0;
5883 
5884 	eos = nscroll = view->nlines - 2;
5885 	if (view_is_hsplit_top(view))
5886 		--eos;  /* border */
5887 
5888 	switch (ch) {
5889 	case '0':
5890 		view->x = 0;
5891 		break;
5892 	case '$':
5893 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5894 		view->count = 0;
5895 		break;
5896 	case KEY_RIGHT:
5897 	case 'l':
5898 		if (view->x + view->ncols / 3 < view->maxx)
5899 			view->x += 2;  /* move two columns right */
5900 		else
5901 			view->count = 0;
5902 		break;
5903 	case KEY_LEFT:
5904 	case 'h':
5905 		view->x -= MIN(view->x, 2);  /* move two columns back */
5906 		if (view->x <= 0)
5907 			view->count = 0;
5908 		break;
5909 	case 'q':
5910 		s->done = 1;
5911 		break;
5912 	case 'g':
5913 	case KEY_HOME:
5914 		s->selected_line = 1;
5915 		s->first_displayed_line = 1;
5916 		view->count = 0;
5917 		break;
5918 	case 'G':
5919 	case KEY_END:
5920 		if (s->blame.nlines < eos) {
5921 			s->selected_line = s->blame.nlines;
5922 			s->first_displayed_line = 1;
5923 		} else {
5924 			s->selected_line = eos;
5925 			s->first_displayed_line = s->blame.nlines - (eos - 1);
5926 		}
5927 		view->count = 0;
5928 		break;
5929 	case 'k':
5930 	case KEY_UP:
5931 	case CTRL('p'):
5932 		if (s->selected_line > 1)
5933 			s->selected_line--;
5934 		else if (s->selected_line == 1 &&
5935 		    s->first_displayed_line > 1)
5936 			s->first_displayed_line--;
5937 		else
5938 			view->count = 0;
5939 		break;
5940 	case CTRL('u'):
5941 	case 'u':
5942 		nscroll /= 2;
5943 		/* FALL THROUGH */
5944 	case KEY_PPAGE:
5945 	case CTRL('b'):
5946 	case 'b':
5947 		if (s->first_displayed_line == 1) {
5948 			if (view->count > 1)
5949 				nscroll += nscroll;
5950 			s->selected_line = MAX(1, s->selected_line - nscroll);
5951 			view->count = 0;
5952 			break;
5953 		}
5954 		if (s->first_displayed_line > nscroll)
5955 			s->first_displayed_line -= nscroll;
5956 		else
5957 			s->first_displayed_line = 1;
5958 		break;
5959 	case 'j':
5960 	case KEY_DOWN:
5961 	case CTRL('n'):
5962 		if (s->selected_line < eos && s->first_displayed_line +
5963 		    s->selected_line <= s->blame.nlines)
5964 			s->selected_line++;
5965 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
5966 			s->first_displayed_line++;
5967 		else
5968 			view->count = 0;
5969 		break;
5970 	case 'c':
5971 	case 'p': {
5972 		struct got_object_id *id = NULL;
5973 
5974 		view->count = 0;
5975 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5976 		    s->first_displayed_line, s->selected_line);
5977 		if (id == NULL)
5978 			break;
5979 		if (ch == 'p') {
5980 			struct got_commit_object *commit, *pcommit;
5981 			struct got_object_qid *pid;
5982 			struct got_object_id *blob_id = NULL;
5983 			int obj_type;
5984 			err = got_object_open_as_commit(&commit,
5985 			    s->repo, id);
5986 			if (err)
5987 				break;
5988 			pid = STAILQ_FIRST(
5989 			    got_object_commit_get_parent_ids(commit));
5990 			if (pid == NULL) {
5991 				got_object_commit_close(commit);
5992 				break;
5993 			}
5994 			/* Check if path history ends here. */
5995 			err = got_object_open_as_commit(&pcommit,
5996 			    s->repo, &pid->id);
5997 			if (err)
5998 				break;
5999 			err = got_object_id_by_path(&blob_id, s->repo,
6000 			    pcommit, s->path);
6001 			got_object_commit_close(pcommit);
6002 			if (err) {
6003 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
6004 					err = NULL;
6005 				got_object_commit_close(commit);
6006 				break;
6007 			}
6008 			err = got_object_get_type(&obj_type, s->repo,
6009 			    blob_id);
6010 			free(blob_id);
6011 			/* Can't blame non-blob type objects. */
6012 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
6013 				got_object_commit_close(commit);
6014 				break;
6015 			}
6016 			err = got_object_qid_alloc(&s->blamed_commit,
6017 			    &pid->id);
6018 			got_object_commit_close(commit);
6019 		} else {
6020 			if (got_object_id_cmp(id,
6021 			    &s->blamed_commit->id) == 0)
6022 				break;
6023 			err = got_object_qid_alloc(&s->blamed_commit,
6024 			    id);
6025 		}
6026 		if (err)
6027 			break;
6028 		s->done = 1;
6029 		thread_err = stop_blame(&s->blame);
6030 		s->done = 0;
6031 		if (thread_err)
6032 			break;
6033 		STAILQ_INSERT_HEAD(&s->blamed_commits,
6034 		    s->blamed_commit, entry);
6035 		err = run_blame(view);
6036 		if (err)
6037 			break;
6038 		break;
6039 	}
6040 	case 'C': {
6041 		struct got_object_qid *first;
6042 
6043 		view->count = 0;
6044 		first = STAILQ_FIRST(&s->blamed_commits);
6045 		if (!got_object_id_cmp(&first->id, s->commit_id))
6046 			break;
6047 		s->done = 1;
6048 		thread_err = stop_blame(&s->blame);
6049 		s->done = 0;
6050 		if (thread_err)
6051 			break;
6052 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6053 		got_object_qid_free(s->blamed_commit);
6054 		s->blamed_commit =
6055 		    STAILQ_FIRST(&s->blamed_commits);
6056 		err = run_blame(view);
6057 		if (err)
6058 			break;
6059 		break;
6060 	}
6061 	case 'L':
6062 		view->count = 0;
6063 		s->id_to_log = get_selected_commit_id(s->blame.lines,
6064 		    s->blame.nlines, s->first_displayed_line, s->selected_line);
6065 		if (s->id_to_log)
6066 			err = view_request_new(new_view, view, TOG_VIEW_LOG);
6067 		break;
6068 	case KEY_ENTER:
6069 	case '\r': {
6070 		struct got_object_id *id = NULL;
6071 		struct got_object_qid *pid;
6072 		struct got_commit_object *commit = NULL;
6073 
6074 		view->count = 0;
6075 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
6076 		    s->first_displayed_line, s->selected_line);
6077 		if (id == NULL)
6078 			break;
6079 		err = got_object_open_as_commit(&commit, s->repo, id);
6080 		if (err)
6081 			break;
6082 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
6083 		if (*new_view) {
6084 			/* traversed from diff view, release diff resources  */
6085 			err = close_diff_view(*new_view);
6086 			if (err)
6087 				break;
6088 			diff_view = *new_view;
6089 		} else {
6090 			if (view_is_parent_view(view))
6091 				view_get_split(view, &begin_y, &begin_x);
6092 
6093 			diff_view = view_open(0, 0, begin_y, begin_x,
6094 			    TOG_VIEW_DIFF);
6095 			if (diff_view == NULL) {
6096 				got_object_commit_close(commit);
6097 				err = got_error_from_errno("view_open");
6098 				break;
6099 			}
6100 		}
6101 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
6102 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
6103 		got_object_commit_close(commit);
6104 		if (err) {
6105 			view_close(diff_view);
6106 			break;
6107 		}
6108 		s->last_diffed_line = s->first_displayed_line - 1 +
6109 		    s->selected_line;
6110 		if (*new_view)
6111 			break;	/* still open from active diff view */
6112 		if (view_is_parent_view(view) &&
6113 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6114 			err = view_init_hsplit(view, begin_y);
6115 			if (err)
6116 				break;
6117 		}
6118 
6119 		view->focussed = 0;
6120 		diff_view->focussed = 1;
6121 		diff_view->mode = view->mode;
6122 		diff_view->nlines = view->lines - begin_y;
6123 		if (view_is_parent_view(view)) {
6124 			view_transfer_size(diff_view, view);
6125 			err = view_close_child(view);
6126 			if (err)
6127 				break;
6128 			err = view_set_child(view, diff_view);
6129 			if (err)
6130 				break;
6131 			view->focus_child = 1;
6132 		} else
6133 			*new_view = diff_view;
6134 		if (err)
6135 			break;
6136 		break;
6137 	}
6138 	case CTRL('d'):
6139 	case 'd':
6140 		nscroll /= 2;
6141 		/* FALL THROUGH */
6142 	case KEY_NPAGE:
6143 	case CTRL('f'):
6144 	case 'f':
6145 	case ' ':
6146 		if (s->last_displayed_line >= s->blame.nlines &&
6147 		    s->selected_line >= MIN(s->blame.nlines,
6148 		    view->nlines - 2)) {
6149 			view->count = 0;
6150 			break;
6151 		}
6152 		if (s->last_displayed_line >= s->blame.nlines &&
6153 		    s->selected_line < view->nlines - 2) {
6154 			s->selected_line +=
6155 			    MIN(nscroll, s->last_displayed_line -
6156 			    s->first_displayed_line - s->selected_line + 1);
6157 		}
6158 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
6159 			s->first_displayed_line += nscroll;
6160 		else
6161 			s->first_displayed_line =
6162 			    s->blame.nlines - (view->nlines - 3);
6163 		break;
6164 	case KEY_RESIZE:
6165 		if (s->selected_line > view->nlines - 2) {
6166 			s->selected_line = MIN(s->blame.nlines,
6167 			    view->nlines - 2);
6168 		}
6169 		break;
6170 	default:
6171 		view->count = 0;
6172 		break;
6173 	}
6174 	return thread_err ? thread_err : err;
6175 }
6176 
6177 static const struct got_error *
6178 reset_blame_view(struct tog_view *view)
6179 {
6180 	const struct got_error *err;
6181 	struct tog_blame_view_state *s = &view->state.blame;
6182 
6183 	view->count = 0;
6184 	s->done = 1;
6185 	err = stop_blame(&s->blame);
6186 	s->done = 0;
6187 	if (err)
6188 		return err;
6189 	return run_blame(view);
6190 }
6191 
6192 static const struct got_error *
6193 cmd_blame(int argc, char *argv[])
6194 {
6195 	const struct got_error *error;
6196 	struct got_repository *repo = NULL;
6197 	struct got_worktree *worktree = NULL;
6198 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6199 	char *link_target = NULL;
6200 	struct got_object_id *commit_id = NULL;
6201 	struct got_commit_object *commit = NULL;
6202 	char *commit_id_str = NULL;
6203 	int ch;
6204 	struct tog_view *view;
6205 	int *pack_fds = NULL;
6206 
6207 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6208 		switch (ch) {
6209 		case 'c':
6210 			commit_id_str = optarg;
6211 			break;
6212 		case 'r':
6213 			repo_path = realpath(optarg, NULL);
6214 			if (repo_path == NULL)
6215 				return got_error_from_errno2("realpath",
6216 				    optarg);
6217 			break;
6218 		default:
6219 			usage_blame();
6220 			/* NOTREACHED */
6221 		}
6222 	}
6223 
6224 	argc -= optind;
6225 	argv += optind;
6226 
6227 	if (argc != 1)
6228 		usage_blame();
6229 
6230 	error = got_repo_pack_fds_open(&pack_fds);
6231 	if (error != NULL)
6232 		goto done;
6233 
6234 	if (repo_path == NULL) {
6235 		cwd = getcwd(NULL, 0);
6236 		if (cwd == NULL)
6237 			return got_error_from_errno("getcwd");
6238 		error = got_worktree_open(&worktree, cwd);
6239 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6240 			goto done;
6241 		if (worktree)
6242 			repo_path =
6243 			    strdup(got_worktree_get_repo_path(worktree));
6244 		else
6245 			repo_path = strdup(cwd);
6246 		if (repo_path == NULL) {
6247 			error = got_error_from_errno("strdup");
6248 			goto done;
6249 		}
6250 	}
6251 
6252 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6253 	if (error != NULL)
6254 		goto done;
6255 
6256 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
6257 	    worktree);
6258 	if (error)
6259 		goto done;
6260 
6261 	init_curses();
6262 
6263 	error = apply_unveil(got_repo_get_path(repo), NULL);
6264 	if (error)
6265 		goto done;
6266 
6267 	error = tog_load_refs(repo, 0);
6268 	if (error)
6269 		goto done;
6270 
6271 	if (commit_id_str == NULL) {
6272 		struct got_reference *head_ref;
6273 		error = got_ref_open(&head_ref, repo, worktree ?
6274 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
6275 		if (error != NULL)
6276 			goto done;
6277 		error = got_ref_resolve(&commit_id, repo, head_ref);
6278 		got_ref_close(head_ref);
6279 	} else {
6280 		error = got_repo_match_object_id(&commit_id, NULL,
6281 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6282 	}
6283 	if (error != NULL)
6284 		goto done;
6285 
6286 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
6287 	if (view == NULL) {
6288 		error = got_error_from_errno("view_open");
6289 		goto done;
6290 	}
6291 
6292 	error = got_object_open_as_commit(&commit, repo, commit_id);
6293 	if (error)
6294 		goto done;
6295 
6296 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
6297 	    commit, repo);
6298 	if (error)
6299 		goto done;
6300 
6301 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
6302 	    commit_id, repo);
6303 	if (error)
6304 		goto done;
6305 	if (worktree) {
6306 		/* Release work tree lock. */
6307 		got_worktree_close(worktree);
6308 		worktree = NULL;
6309 	}
6310 	error = view_loop(view);
6311 done:
6312 	free(repo_path);
6313 	free(in_repo_path);
6314 	free(link_target);
6315 	free(cwd);
6316 	free(commit_id);
6317 	if (commit)
6318 		got_object_commit_close(commit);
6319 	if (worktree)
6320 		got_worktree_close(worktree);
6321 	if (repo) {
6322 		const struct got_error *close_err = got_repo_close(repo);
6323 		if (error == NULL)
6324 			error = close_err;
6325 	}
6326 	if (pack_fds) {
6327 		const struct got_error *pack_err =
6328 		    got_repo_pack_fds_close(pack_fds);
6329 		if (error == NULL)
6330 			error = pack_err;
6331 	}
6332 	tog_free_refs();
6333 	return error;
6334 }
6335 
6336 static const struct got_error *
6337 draw_tree_entries(struct tog_view *view, const char *parent_path)
6338 {
6339 	struct tog_tree_view_state *s = &view->state.tree;
6340 	const struct got_error *err = NULL;
6341 	struct got_tree_entry *te;
6342 	wchar_t *wline;
6343 	struct tog_color *tc;
6344 	int width, n, nentries, i = 1;
6345 	int limit = view->nlines;
6346 
6347 	s->ndisplayed = 0;
6348 	if (view_is_hsplit_top(view))
6349 		--limit;  /* border */
6350 
6351 	werase(view->window);
6352 
6353 	if (limit == 0)
6354 		return NULL;
6355 
6356 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
6357 	    0, 0);
6358 	if (err)
6359 		return err;
6360 	if (view_needs_focus_indication(view))
6361 		wstandout(view->window);
6362 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6363 	if (tc)
6364 		wattr_on(view->window,
6365 		    COLOR_PAIR(tc->colorpair), NULL);
6366 	waddwstr(view->window, wline);
6367 	if (tc)
6368 		wattr_off(view->window,
6369 		    COLOR_PAIR(tc->colorpair), NULL);
6370 	if (view_needs_focus_indication(view))
6371 		wstandend(view->window);
6372 	free(wline);
6373 	wline = NULL;
6374 
6375 	i += s->selected;
6376 	if (s->first_displayed_entry) {
6377 		i += got_tree_entry_get_index(s->first_displayed_entry);
6378 		if (s->tree != s->root)
6379 			++i;  /* account for ".." entry */
6380 	}
6381 	nentries = got_object_tree_get_nentries(s->tree);
6382 	wprintw(view->window, " [%d/%d]", i,
6383 	    nentries + (s->tree == s->root ? 0 : 1));  /* ".." in !root tree */
6384 
6385 	if (width < view->ncols - 1)
6386 		waddch(view->window, '\n');
6387 	if (--limit <= 0)
6388 		return NULL;
6389 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
6390 	    0, 0);
6391 	if (err)
6392 		return err;
6393 	waddwstr(view->window, wline);
6394 	free(wline);
6395 	wline = NULL;
6396 	if (width < view->ncols - 1)
6397 		waddch(view->window, '\n');
6398 	if (--limit <= 0)
6399 		return NULL;
6400 	waddch(view->window, '\n');
6401 	if (--limit <= 0)
6402 		return NULL;
6403 
6404 	if (s->first_displayed_entry == NULL) {
6405 		te = got_object_tree_get_first_entry(s->tree);
6406 		if (s->selected == 0) {
6407 			if (view->focussed)
6408 				wstandout(view->window);
6409 			s->selected_entry = NULL;
6410 		}
6411 		waddstr(view->window, "  ..\n");	/* parent directory */
6412 		if (s->selected == 0 && view->focussed)
6413 			wstandend(view->window);
6414 		s->ndisplayed++;
6415 		if (--limit <= 0)
6416 			return NULL;
6417 		n = 1;
6418 	} else {
6419 		n = 0;
6420 		te = s->first_displayed_entry;
6421 	}
6422 
6423 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
6424 		char *line = NULL, *id_str = NULL, *link_target = NULL;
6425 		const char *modestr = "";
6426 		mode_t mode;
6427 
6428 		te = got_object_tree_get_entry(s->tree, i);
6429 		mode = got_tree_entry_get_mode(te);
6430 
6431 		if (s->show_ids) {
6432 			err = got_object_id_str(&id_str,
6433 			    got_tree_entry_get_id(te));
6434 			if (err)
6435 				return got_error_from_errno(
6436 				    "got_object_id_str");
6437 		}
6438 		if (got_object_tree_entry_is_submodule(te))
6439 			modestr = "$";
6440 		else if (S_ISLNK(mode)) {
6441 			int i;
6442 
6443 			err = got_tree_entry_get_symlink_target(&link_target,
6444 			    te, s->repo);
6445 			if (err) {
6446 				free(id_str);
6447 				return err;
6448 			}
6449 			for (i = 0; i < strlen(link_target); i++) {
6450 				if (!isprint((unsigned char)link_target[i]))
6451 					link_target[i] = '?';
6452 			}
6453 			modestr = "@";
6454 		}
6455 		else if (S_ISDIR(mode))
6456 			modestr = "/";
6457 		else if (mode & S_IXUSR)
6458 			modestr = "*";
6459 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
6460 		    got_tree_entry_get_name(te), modestr,
6461 		    link_target ? " -> ": "",
6462 		    link_target ? link_target : "") == -1) {
6463 			free(id_str);
6464 			free(link_target);
6465 			return got_error_from_errno("asprintf");
6466 		}
6467 		free(id_str);
6468 		free(link_target);
6469 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6470 		    0, 0);
6471 		if (err) {
6472 			free(line);
6473 			break;
6474 		}
6475 		if (n == s->selected) {
6476 			if (view->focussed)
6477 				wstandout(view->window);
6478 			s->selected_entry = te;
6479 		}
6480 		tc = match_color(&s->colors, line);
6481 		if (tc)
6482 			wattr_on(view->window,
6483 			    COLOR_PAIR(tc->colorpair), NULL);
6484 		waddwstr(view->window, wline);
6485 		if (tc)
6486 			wattr_off(view->window,
6487 			    COLOR_PAIR(tc->colorpair), NULL);
6488 		if (width < view->ncols - 1)
6489 			waddch(view->window, '\n');
6490 		if (n == s->selected && view->focussed)
6491 			wstandend(view->window);
6492 		free(line);
6493 		free(wline);
6494 		wline = NULL;
6495 		n++;
6496 		s->ndisplayed++;
6497 		s->last_displayed_entry = te;
6498 		if (--limit <= 0)
6499 			break;
6500 	}
6501 
6502 	return err;
6503 }
6504 
6505 static void
6506 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
6507 {
6508 	struct got_tree_entry *te;
6509 	int isroot = s->tree == s->root;
6510 	int i = 0;
6511 
6512 	if (s->first_displayed_entry == NULL)
6513 		return;
6514 
6515 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
6516 	while (i++ < maxscroll) {
6517 		if (te == NULL) {
6518 			if (!isroot)
6519 				s->first_displayed_entry = NULL;
6520 			break;
6521 		}
6522 		s->first_displayed_entry = te;
6523 		te = got_tree_entry_get_prev(s->tree, te);
6524 	}
6525 }
6526 
6527 static const struct got_error *
6528 tree_scroll_down(struct tog_view *view, int maxscroll)
6529 {
6530 	struct tog_tree_view_state *s = &view->state.tree;
6531 	struct got_tree_entry *next, *last;
6532 	int n = 0;
6533 
6534 	if (s->first_displayed_entry)
6535 		next = got_tree_entry_get_next(s->tree,
6536 		    s->first_displayed_entry);
6537 	else
6538 		next = got_object_tree_get_first_entry(s->tree);
6539 
6540 	last = s->last_displayed_entry;
6541 	while (next && n++ < maxscroll) {
6542 		if (last) {
6543 			s->last_displayed_entry = last;
6544 			last = got_tree_entry_get_next(s->tree, last);
6545 		}
6546 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
6547 			s->first_displayed_entry = next;
6548 			next = got_tree_entry_get_next(s->tree, next);
6549 		}
6550 	}
6551 
6552 	return NULL;
6553 }
6554 
6555 static const struct got_error *
6556 tree_entry_path(char **path, struct tog_parent_trees *parents,
6557     struct got_tree_entry *te)
6558 {
6559 	const struct got_error *err = NULL;
6560 	struct tog_parent_tree *pt;
6561 	size_t len = 2; /* for leading slash and NUL */
6562 
6563 	TAILQ_FOREACH(pt, parents, entry)
6564 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
6565 		    + 1 /* slash */;
6566 	if (te)
6567 		len += strlen(got_tree_entry_get_name(te));
6568 
6569 	*path = calloc(1, len);
6570 	if (path == NULL)
6571 		return got_error_from_errno("calloc");
6572 
6573 	(*path)[0] = '/';
6574 	pt = TAILQ_LAST(parents, tog_parent_trees);
6575 	while (pt) {
6576 		const char *name = got_tree_entry_get_name(pt->selected_entry);
6577 		if (strlcat(*path, name, len) >= len) {
6578 			err = got_error(GOT_ERR_NO_SPACE);
6579 			goto done;
6580 		}
6581 		if (strlcat(*path, "/", len) >= len) {
6582 			err = got_error(GOT_ERR_NO_SPACE);
6583 			goto done;
6584 		}
6585 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
6586 	}
6587 	if (te) {
6588 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
6589 			err = got_error(GOT_ERR_NO_SPACE);
6590 			goto done;
6591 		}
6592 	}
6593 done:
6594 	if (err) {
6595 		free(*path);
6596 		*path = NULL;
6597 	}
6598 	return err;
6599 }
6600 
6601 static const struct got_error *
6602 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6603     struct got_tree_entry *te, struct tog_parent_trees *parents,
6604     struct got_object_id *commit_id, struct got_repository *repo)
6605 {
6606 	const struct got_error *err = NULL;
6607 	char *path;
6608 	struct tog_view *blame_view;
6609 
6610 	*new_view = NULL;
6611 
6612 	err = tree_entry_path(&path, parents, te);
6613 	if (err)
6614 		return err;
6615 
6616 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
6617 	if (blame_view == NULL) {
6618 		err = got_error_from_errno("view_open");
6619 		goto done;
6620 	}
6621 
6622 	err = open_blame_view(blame_view, path, commit_id, repo);
6623 	if (err) {
6624 		if (err->code == GOT_ERR_CANCELLED)
6625 			err = NULL;
6626 		view_close(blame_view);
6627 	} else
6628 		*new_view = blame_view;
6629 done:
6630 	free(path);
6631 	return err;
6632 }
6633 
6634 static const struct got_error *
6635 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6636     struct tog_tree_view_state *s)
6637 {
6638 	struct tog_view *log_view;
6639 	const struct got_error *err = NULL;
6640 	char *path;
6641 
6642 	*new_view = NULL;
6643 
6644 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6645 	if (log_view == NULL)
6646 		return got_error_from_errno("view_open");
6647 
6648 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
6649 	if (err)
6650 		return err;
6651 
6652 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
6653 	    path, 0);
6654 	if (err)
6655 		view_close(log_view);
6656 	else
6657 		*new_view = log_view;
6658 	free(path);
6659 	return err;
6660 }
6661 
6662 static const struct got_error *
6663 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
6664     const char *head_ref_name, struct got_repository *repo)
6665 {
6666 	const struct got_error *err = NULL;
6667 	char *commit_id_str = NULL;
6668 	struct tog_tree_view_state *s = &view->state.tree;
6669 	struct got_commit_object *commit = NULL;
6670 
6671 	TAILQ_INIT(&s->parents);
6672 	STAILQ_INIT(&s->colors);
6673 
6674 	s->commit_id = got_object_id_dup(commit_id);
6675 	if (s->commit_id == NULL)
6676 		return got_error_from_errno("got_object_id_dup");
6677 
6678 	err = got_object_open_as_commit(&commit, repo, commit_id);
6679 	if (err)
6680 		goto done;
6681 
6682 	/*
6683 	 * The root is opened here and will be closed when the view is closed.
6684 	 * Any visited subtrees and their path-wise parents are opened and
6685 	 * closed on demand.
6686 	 */
6687 	err = got_object_open_as_tree(&s->root, repo,
6688 	    got_object_commit_get_tree_id(commit));
6689 	if (err)
6690 		goto done;
6691 	s->tree = s->root;
6692 
6693 	err = got_object_id_str(&commit_id_str, commit_id);
6694 	if (err != NULL)
6695 		goto done;
6696 
6697 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
6698 		err = got_error_from_errno("asprintf");
6699 		goto done;
6700 	}
6701 
6702 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
6703 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
6704 	if (head_ref_name) {
6705 		s->head_ref_name = strdup(head_ref_name);
6706 		if (s->head_ref_name == NULL) {
6707 			err = got_error_from_errno("strdup");
6708 			goto done;
6709 		}
6710 	}
6711 	s->repo = repo;
6712 
6713 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6714 		err = add_color(&s->colors, "\\$$",
6715 		    TOG_COLOR_TREE_SUBMODULE,
6716 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
6717 		if (err)
6718 			goto done;
6719 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
6720 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
6721 		if (err)
6722 			goto done;
6723 		err = add_color(&s->colors, "/$",
6724 		    TOG_COLOR_TREE_DIRECTORY,
6725 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
6726 		if (err)
6727 			goto done;
6728 
6729 		err = add_color(&s->colors, "\\*$",
6730 		    TOG_COLOR_TREE_EXECUTABLE,
6731 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
6732 		if (err)
6733 			goto done;
6734 
6735 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
6736 		    get_color_value("TOG_COLOR_COMMIT"));
6737 		if (err)
6738 			goto done;
6739 	}
6740 
6741 	view->show = show_tree_view;
6742 	view->input = input_tree_view;
6743 	view->close = close_tree_view;
6744 	view->search_start = search_start_tree_view;
6745 	view->search_next = search_next_tree_view;
6746 done:
6747 	free(commit_id_str);
6748 	if (commit)
6749 		got_object_commit_close(commit);
6750 	if (err)
6751 		close_tree_view(view);
6752 	return err;
6753 }
6754 
6755 static const struct got_error *
6756 close_tree_view(struct tog_view *view)
6757 {
6758 	struct tog_tree_view_state *s = &view->state.tree;
6759 
6760 	free_colors(&s->colors);
6761 	free(s->tree_label);
6762 	s->tree_label = NULL;
6763 	free(s->commit_id);
6764 	s->commit_id = NULL;
6765 	free(s->head_ref_name);
6766 	s->head_ref_name = NULL;
6767 	while (!TAILQ_EMPTY(&s->parents)) {
6768 		struct tog_parent_tree *parent;
6769 		parent = TAILQ_FIRST(&s->parents);
6770 		TAILQ_REMOVE(&s->parents, parent, entry);
6771 		if (parent->tree != s->root)
6772 			got_object_tree_close(parent->tree);
6773 		free(parent);
6774 
6775 	}
6776 	if (s->tree != NULL && s->tree != s->root)
6777 		got_object_tree_close(s->tree);
6778 	if (s->root)
6779 		got_object_tree_close(s->root);
6780 	return NULL;
6781 }
6782 
6783 static const struct got_error *
6784 search_start_tree_view(struct tog_view *view)
6785 {
6786 	struct tog_tree_view_state *s = &view->state.tree;
6787 
6788 	s->matched_entry = NULL;
6789 	return NULL;
6790 }
6791 
6792 static int
6793 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
6794 {
6795 	regmatch_t regmatch;
6796 
6797 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
6798 	    0) == 0;
6799 }
6800 
6801 static const struct got_error *
6802 search_next_tree_view(struct tog_view *view)
6803 {
6804 	struct tog_tree_view_state *s = &view->state.tree;
6805 	struct got_tree_entry *te = NULL;
6806 
6807 	if (!view->searching) {
6808 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6809 		return NULL;
6810 	}
6811 
6812 	if (s->matched_entry) {
6813 		if (view->searching == TOG_SEARCH_FORWARD) {
6814 			if (s->selected_entry)
6815 				te = got_tree_entry_get_next(s->tree,
6816 				    s->selected_entry);
6817 			else
6818 				te = got_object_tree_get_first_entry(s->tree);
6819 		} else {
6820 			if (s->selected_entry == NULL)
6821 				te = got_object_tree_get_last_entry(s->tree);
6822 			else
6823 				te = got_tree_entry_get_prev(s->tree,
6824 				    s->selected_entry);
6825 		}
6826 	} else {
6827 		if (s->selected_entry)
6828 			te = s->selected_entry;
6829 		else if (view->searching == TOG_SEARCH_FORWARD)
6830 			te = got_object_tree_get_first_entry(s->tree);
6831 		else
6832 			te = got_object_tree_get_last_entry(s->tree);
6833 	}
6834 
6835 	while (1) {
6836 		if (te == NULL) {
6837 			if (s->matched_entry == NULL) {
6838 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6839 				return NULL;
6840 			}
6841 			if (view->searching == TOG_SEARCH_FORWARD)
6842 				te = got_object_tree_get_first_entry(s->tree);
6843 			else
6844 				te = got_object_tree_get_last_entry(s->tree);
6845 		}
6846 
6847 		if (match_tree_entry(te, &view->regex)) {
6848 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6849 			s->matched_entry = te;
6850 			break;
6851 		}
6852 
6853 		if (view->searching == TOG_SEARCH_FORWARD)
6854 			te = got_tree_entry_get_next(s->tree, te);
6855 		else
6856 			te = got_tree_entry_get_prev(s->tree, te);
6857 	}
6858 
6859 	if (s->matched_entry) {
6860 		s->first_displayed_entry = s->matched_entry;
6861 		s->selected = 0;
6862 	}
6863 
6864 	return NULL;
6865 }
6866 
6867 static const struct got_error *
6868 show_tree_view(struct tog_view *view)
6869 {
6870 	const struct got_error *err = NULL;
6871 	struct tog_tree_view_state *s = &view->state.tree;
6872 	char *parent_path;
6873 
6874 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6875 	if (err)
6876 		return err;
6877 
6878 	err = draw_tree_entries(view, parent_path);
6879 	free(parent_path);
6880 
6881 	view_border(view);
6882 	return err;
6883 }
6884 
6885 static const struct got_error *
6886 tree_goto_line(struct tog_view *view, int nlines)
6887 {
6888 	const struct got_error		 *err = NULL;
6889 	struct tog_tree_view_state	 *s = &view->state.tree;
6890 	struct got_tree_entry		**fte, **lte, **ste;
6891 	int				  g, last, first = 1, i = 1;
6892 	int				  root = s->tree == s->root;
6893 	int				  off = root ? 1 : 2;
6894 
6895 	g = view->gline;
6896 	view->gline = 0;
6897 
6898 	if (g == 0)
6899 		g = 1;
6900 	else if (g > got_object_tree_get_nentries(s->tree))
6901 		g = got_object_tree_get_nentries(s->tree) + (root ? 0 : 1);
6902 
6903 	fte = &s->first_displayed_entry;
6904 	lte = &s->last_displayed_entry;
6905 	ste = &s->selected_entry;
6906 
6907 	if (*fte != NULL) {
6908 		first = got_tree_entry_get_index(*fte);
6909 		first += off;  /* account for ".." */
6910 	}
6911 	last = got_tree_entry_get_index(*lte);
6912 	last += off;
6913 
6914 	if (g >= first && g <= last && g - first < nlines) {
6915 		s->selected = g - first;
6916 		return NULL;	/* gline is on the current page */
6917 	}
6918 
6919 	if (*ste != NULL) {
6920 		i = got_tree_entry_get_index(*ste);
6921 		i += off;
6922 	}
6923 
6924 	if (i < g) {
6925 		err = tree_scroll_down(view, g - i);
6926 		if (err)
6927 			return err;
6928 		if (got_tree_entry_get_index(*lte) >=
6929 		    got_object_tree_get_nentries(s->tree) - 1 &&
6930 		    first + s->selected < g &&
6931 		    s->selected < s->ndisplayed - 1) {
6932 			first = got_tree_entry_get_index(*fte);
6933 			first += off;
6934 			s->selected = g - first;
6935 		}
6936 	} else if (i > g)
6937 		tree_scroll_up(s, i - g);
6938 
6939 	if (g < nlines &&
6940 	    (*fte == NULL || (root && !got_tree_entry_get_index(*fte))))
6941 		s->selected = g - 1;
6942 
6943 	return NULL;
6944 }
6945 
6946 static const struct got_error *
6947 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6948 {
6949 	const struct got_error *err = NULL;
6950 	struct tog_tree_view_state *s = &view->state.tree;
6951 	struct got_tree_entry *te;
6952 	int n, nscroll = view->nlines - 3;
6953 
6954 	if (view->gline)
6955 		return tree_goto_line(view, nscroll);
6956 
6957 	switch (ch) {
6958 	case 'i':
6959 		s->show_ids = !s->show_ids;
6960 		view->count = 0;
6961 		break;
6962 	case 'L':
6963 		view->count = 0;
6964 		if (!s->selected_entry)
6965 			break;
6966 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
6967 		break;
6968 	case 'R':
6969 		view->count = 0;
6970 		err = view_request_new(new_view, view, TOG_VIEW_REF);
6971 		break;
6972 	case 'g':
6973 	case KEY_HOME:
6974 		s->selected = 0;
6975 		view->count = 0;
6976 		if (s->tree == s->root)
6977 			s->first_displayed_entry =
6978 			    got_object_tree_get_first_entry(s->tree);
6979 		else
6980 			s->first_displayed_entry = NULL;
6981 		break;
6982 	case 'G':
6983 	case KEY_END: {
6984 		int eos = view->nlines - 3;
6985 
6986 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
6987 			--eos;  /* border */
6988 		s->selected = 0;
6989 		view->count = 0;
6990 		te = got_object_tree_get_last_entry(s->tree);
6991 		for (n = 0; n < eos; n++) {
6992 			if (te == NULL) {
6993 				if (s->tree != s->root) {
6994 					s->first_displayed_entry = NULL;
6995 					n++;
6996 				}
6997 				break;
6998 			}
6999 			s->first_displayed_entry = te;
7000 			te = got_tree_entry_get_prev(s->tree, te);
7001 		}
7002 		if (n > 0)
7003 			s->selected = n - 1;
7004 		break;
7005 	}
7006 	case 'k':
7007 	case KEY_UP:
7008 	case CTRL('p'):
7009 		if (s->selected > 0) {
7010 			s->selected--;
7011 			break;
7012 		}
7013 		tree_scroll_up(s, 1);
7014 		if (s->selected_entry == NULL ||
7015 		    (s->tree == s->root && s->selected_entry ==
7016 		     got_object_tree_get_first_entry(s->tree)))
7017 			view->count = 0;
7018 		break;
7019 	case CTRL('u'):
7020 	case 'u':
7021 		nscroll /= 2;
7022 		/* FALL THROUGH */
7023 	case KEY_PPAGE:
7024 	case CTRL('b'):
7025 	case 'b':
7026 		if (s->tree == s->root) {
7027 			if (got_object_tree_get_first_entry(s->tree) ==
7028 			    s->first_displayed_entry)
7029 				s->selected -= MIN(s->selected, nscroll);
7030 		} else {
7031 			if (s->first_displayed_entry == NULL)
7032 				s->selected -= MIN(s->selected, nscroll);
7033 		}
7034 		tree_scroll_up(s, MAX(0, nscroll));
7035 		if (s->selected_entry == NULL ||
7036 		    (s->tree == s->root && s->selected_entry ==
7037 		     got_object_tree_get_first_entry(s->tree)))
7038 			view->count = 0;
7039 		break;
7040 	case 'j':
7041 	case KEY_DOWN:
7042 	case CTRL('n'):
7043 		if (s->selected < s->ndisplayed - 1) {
7044 			s->selected++;
7045 			break;
7046 		}
7047 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7048 		    == NULL) {
7049 			/* can't scroll any further */
7050 			view->count = 0;
7051 			break;
7052 		}
7053 		tree_scroll_down(view, 1);
7054 		break;
7055 	case CTRL('d'):
7056 	case 'd':
7057 		nscroll /= 2;
7058 		/* FALL THROUGH */
7059 	case KEY_NPAGE:
7060 	case CTRL('f'):
7061 	case 'f':
7062 	case ' ':
7063 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7064 		    == NULL) {
7065 			/* can't scroll any further; move cursor down */
7066 			if (s->selected < s->ndisplayed - 1)
7067 				s->selected += MIN(nscroll,
7068 				    s->ndisplayed - s->selected - 1);
7069 			else
7070 				view->count = 0;
7071 			break;
7072 		}
7073 		tree_scroll_down(view, nscroll);
7074 		break;
7075 	case KEY_ENTER:
7076 	case '\r':
7077 	case KEY_BACKSPACE:
7078 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
7079 			struct tog_parent_tree *parent;
7080 			/* user selected '..' */
7081 			if (s->tree == s->root) {
7082 				view->count = 0;
7083 				break;
7084 			}
7085 			parent = TAILQ_FIRST(&s->parents);
7086 			TAILQ_REMOVE(&s->parents, parent,
7087 			    entry);
7088 			got_object_tree_close(s->tree);
7089 			s->tree = parent->tree;
7090 			s->first_displayed_entry =
7091 			    parent->first_displayed_entry;
7092 			s->selected_entry =
7093 			    parent->selected_entry;
7094 			s->selected = parent->selected;
7095 			if (s->selected > view->nlines - 3) {
7096 				err = offset_selection_down(view);
7097 				if (err)
7098 					break;
7099 			}
7100 			free(parent);
7101 		} else if (S_ISDIR(got_tree_entry_get_mode(
7102 		    s->selected_entry))) {
7103 			struct got_tree_object *subtree;
7104 			view->count = 0;
7105 			err = got_object_open_as_tree(&subtree, s->repo,
7106 			    got_tree_entry_get_id(s->selected_entry));
7107 			if (err)
7108 				break;
7109 			err = tree_view_visit_subtree(s, subtree);
7110 			if (err) {
7111 				got_object_tree_close(subtree);
7112 				break;
7113 			}
7114 		} else if (S_ISREG(got_tree_entry_get_mode(s->selected_entry)))
7115 			err = view_request_new(new_view, view, TOG_VIEW_BLAME);
7116 		break;
7117 	case KEY_RESIZE:
7118 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
7119 			s->selected = view->nlines - 4;
7120 		view->count = 0;
7121 		break;
7122 	default:
7123 		view->count = 0;
7124 		break;
7125 	}
7126 
7127 	return err;
7128 }
7129 
7130 __dead static void
7131 usage_tree(void)
7132 {
7133 	endwin();
7134 	fprintf(stderr,
7135 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
7136 	    getprogname());
7137 	exit(1);
7138 }
7139 
7140 static const struct got_error *
7141 cmd_tree(int argc, char *argv[])
7142 {
7143 	const struct got_error *error;
7144 	struct got_repository *repo = NULL;
7145 	struct got_worktree *worktree = NULL;
7146 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7147 	struct got_object_id *commit_id = NULL;
7148 	struct got_commit_object *commit = NULL;
7149 	const char *commit_id_arg = NULL;
7150 	char *label = NULL;
7151 	struct got_reference *ref = NULL;
7152 	const char *head_ref_name = NULL;
7153 	int ch;
7154 	struct tog_view *view;
7155 	int *pack_fds = NULL;
7156 
7157 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7158 		switch (ch) {
7159 		case 'c':
7160 			commit_id_arg = optarg;
7161 			break;
7162 		case 'r':
7163 			repo_path = realpath(optarg, NULL);
7164 			if (repo_path == NULL)
7165 				return got_error_from_errno2("realpath",
7166 				    optarg);
7167 			break;
7168 		default:
7169 			usage_tree();
7170 			/* NOTREACHED */
7171 		}
7172 	}
7173 
7174 	argc -= optind;
7175 	argv += optind;
7176 
7177 	if (argc > 1)
7178 		usage_tree();
7179 
7180 	error = got_repo_pack_fds_open(&pack_fds);
7181 	if (error != NULL)
7182 		goto done;
7183 
7184 	if (repo_path == NULL) {
7185 		cwd = getcwd(NULL, 0);
7186 		if (cwd == NULL)
7187 			return got_error_from_errno("getcwd");
7188 		error = got_worktree_open(&worktree, cwd);
7189 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7190 			goto done;
7191 		if (worktree)
7192 			repo_path =
7193 			    strdup(got_worktree_get_repo_path(worktree));
7194 		else
7195 			repo_path = strdup(cwd);
7196 		if (repo_path == NULL) {
7197 			error = got_error_from_errno("strdup");
7198 			goto done;
7199 		}
7200 	}
7201 
7202 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7203 	if (error != NULL)
7204 		goto done;
7205 
7206 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7207 	    repo, worktree);
7208 	if (error)
7209 		goto done;
7210 
7211 	init_curses();
7212 
7213 	error = apply_unveil(got_repo_get_path(repo), NULL);
7214 	if (error)
7215 		goto done;
7216 
7217 	error = tog_load_refs(repo, 0);
7218 	if (error)
7219 		goto done;
7220 
7221 	if (commit_id_arg == NULL) {
7222 		error = got_repo_match_object_id(&commit_id, &label,
7223 		    worktree ? got_worktree_get_head_ref_name(worktree) :
7224 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7225 		if (error)
7226 			goto done;
7227 		head_ref_name = label;
7228 	} else {
7229 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
7230 		if (error == NULL)
7231 			head_ref_name = got_ref_get_name(ref);
7232 		else if (error->code != GOT_ERR_NOT_REF)
7233 			goto done;
7234 		error = got_repo_match_object_id(&commit_id, NULL,
7235 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7236 		if (error)
7237 			goto done;
7238 	}
7239 
7240 	error = got_object_open_as_commit(&commit, repo, commit_id);
7241 	if (error)
7242 		goto done;
7243 
7244 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
7245 	if (view == NULL) {
7246 		error = got_error_from_errno("view_open");
7247 		goto done;
7248 	}
7249 	error = open_tree_view(view, commit_id, head_ref_name, repo);
7250 	if (error)
7251 		goto done;
7252 	if (!got_path_is_root_dir(in_repo_path)) {
7253 		error = tree_view_walk_path(&view->state.tree, commit,
7254 		    in_repo_path);
7255 		if (error)
7256 			goto done;
7257 	}
7258 
7259 	if (worktree) {
7260 		/* Release work tree lock. */
7261 		got_worktree_close(worktree);
7262 		worktree = NULL;
7263 	}
7264 	error = view_loop(view);
7265 done:
7266 	free(repo_path);
7267 	free(cwd);
7268 	free(commit_id);
7269 	free(label);
7270 	if (ref)
7271 		got_ref_close(ref);
7272 	if (repo) {
7273 		const struct got_error *close_err = got_repo_close(repo);
7274 		if (error == NULL)
7275 			error = close_err;
7276 	}
7277 	if (pack_fds) {
7278 		const struct got_error *pack_err =
7279 		    got_repo_pack_fds_close(pack_fds);
7280 		if (error == NULL)
7281 			error = pack_err;
7282 	}
7283 	tog_free_refs();
7284 	return error;
7285 }
7286 
7287 static const struct got_error *
7288 ref_view_load_refs(struct tog_ref_view_state *s)
7289 {
7290 	struct got_reflist_entry *sre;
7291 	struct tog_reflist_entry *re;
7292 
7293 	s->nrefs = 0;
7294 	TAILQ_FOREACH(sre, &tog_refs, entry) {
7295 		if (strncmp(got_ref_get_name(sre->ref),
7296 		    "refs/got/", 9) == 0 &&
7297 		    strncmp(got_ref_get_name(sre->ref),
7298 		    "refs/got/backup/", 16) != 0)
7299 			continue;
7300 
7301 		re = malloc(sizeof(*re));
7302 		if (re == NULL)
7303 			return got_error_from_errno("malloc");
7304 
7305 		re->ref = got_ref_dup(sre->ref);
7306 		if (re->ref == NULL)
7307 			return got_error_from_errno("got_ref_dup");
7308 		re->idx = s->nrefs++;
7309 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
7310 	}
7311 
7312 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7313 	return NULL;
7314 }
7315 
7316 static void
7317 ref_view_free_refs(struct tog_ref_view_state *s)
7318 {
7319 	struct tog_reflist_entry *re;
7320 
7321 	while (!TAILQ_EMPTY(&s->refs)) {
7322 		re = TAILQ_FIRST(&s->refs);
7323 		TAILQ_REMOVE(&s->refs, re, entry);
7324 		got_ref_close(re->ref);
7325 		free(re);
7326 	}
7327 }
7328 
7329 static const struct got_error *
7330 open_ref_view(struct tog_view *view, struct got_repository *repo)
7331 {
7332 	const struct got_error *err = NULL;
7333 	struct tog_ref_view_state *s = &view->state.ref;
7334 
7335 	s->selected_entry = 0;
7336 	s->repo = repo;
7337 
7338 	TAILQ_INIT(&s->refs);
7339 	STAILQ_INIT(&s->colors);
7340 
7341 	err = ref_view_load_refs(s);
7342 	if (err)
7343 		return err;
7344 
7345 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7346 		err = add_color(&s->colors, "^refs/heads/",
7347 		    TOG_COLOR_REFS_HEADS,
7348 		    get_color_value("TOG_COLOR_REFS_HEADS"));
7349 		if (err)
7350 			goto done;
7351 
7352 		err = add_color(&s->colors, "^refs/tags/",
7353 		    TOG_COLOR_REFS_TAGS,
7354 		    get_color_value("TOG_COLOR_REFS_TAGS"));
7355 		if (err)
7356 			goto done;
7357 
7358 		err = add_color(&s->colors, "^refs/remotes/",
7359 		    TOG_COLOR_REFS_REMOTES,
7360 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
7361 		if (err)
7362 			goto done;
7363 
7364 		err = add_color(&s->colors, "^refs/got/backup/",
7365 		    TOG_COLOR_REFS_BACKUP,
7366 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
7367 		if (err)
7368 			goto done;
7369 	}
7370 
7371 	view->show = show_ref_view;
7372 	view->input = input_ref_view;
7373 	view->close = close_ref_view;
7374 	view->search_start = search_start_ref_view;
7375 	view->search_next = search_next_ref_view;
7376 done:
7377 	if (err)
7378 		free_colors(&s->colors);
7379 	return err;
7380 }
7381 
7382 static const struct got_error *
7383 close_ref_view(struct tog_view *view)
7384 {
7385 	struct tog_ref_view_state *s = &view->state.ref;
7386 
7387 	ref_view_free_refs(s);
7388 	free_colors(&s->colors);
7389 
7390 	return NULL;
7391 }
7392 
7393 static const struct got_error *
7394 resolve_reflist_entry(struct got_object_id **commit_id,
7395     struct tog_reflist_entry *re, struct got_repository *repo)
7396 {
7397 	const struct got_error *err = NULL;
7398 	struct got_object_id *obj_id;
7399 	struct got_tag_object *tag = NULL;
7400 	int obj_type;
7401 
7402 	*commit_id = NULL;
7403 
7404 	err = got_ref_resolve(&obj_id, repo, re->ref);
7405 	if (err)
7406 		return err;
7407 
7408 	err = got_object_get_type(&obj_type, repo, obj_id);
7409 	if (err)
7410 		goto done;
7411 
7412 	switch (obj_type) {
7413 	case GOT_OBJ_TYPE_COMMIT:
7414 		*commit_id = obj_id;
7415 		break;
7416 	case GOT_OBJ_TYPE_TAG:
7417 		err = got_object_open_as_tag(&tag, repo, obj_id);
7418 		if (err)
7419 			goto done;
7420 		free(obj_id);
7421 		err = got_object_get_type(&obj_type, repo,
7422 		    got_object_tag_get_object_id(tag));
7423 		if (err)
7424 			goto done;
7425 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
7426 			err = got_error(GOT_ERR_OBJ_TYPE);
7427 			goto done;
7428 		}
7429 		*commit_id = got_object_id_dup(
7430 		    got_object_tag_get_object_id(tag));
7431 		if (*commit_id == NULL) {
7432 			err = got_error_from_errno("got_object_id_dup");
7433 			goto done;
7434 		}
7435 		break;
7436 	default:
7437 		err = got_error(GOT_ERR_OBJ_TYPE);
7438 		break;
7439 	}
7440 
7441 done:
7442 	if (tag)
7443 		got_object_tag_close(tag);
7444 	if (err) {
7445 		free(*commit_id);
7446 		*commit_id = NULL;
7447 	}
7448 	return err;
7449 }
7450 
7451 static const struct got_error *
7452 log_ref_entry(struct tog_view **new_view, int begin_y, int begin_x,
7453     struct tog_reflist_entry *re, struct got_repository *repo)
7454 {
7455 	struct tog_view *log_view;
7456 	const struct got_error *err = NULL;
7457 	struct got_object_id *commit_id = NULL;
7458 
7459 	*new_view = NULL;
7460 
7461 	err = resolve_reflist_entry(&commit_id, re, repo);
7462 	if (err) {
7463 		if (err->code != GOT_ERR_OBJ_TYPE)
7464 			return err;
7465 		else
7466 			return NULL;
7467 	}
7468 
7469 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7470 	if (log_view == NULL) {
7471 		err = got_error_from_errno("view_open");
7472 		goto done;
7473 	}
7474 
7475 	err = open_log_view(log_view, commit_id, repo,
7476 	    got_ref_get_name(re->ref), "", 0);
7477 done:
7478 	if (err)
7479 		view_close(log_view);
7480 	else
7481 		*new_view = log_view;
7482 	free(commit_id);
7483 	return err;
7484 }
7485 
7486 static void
7487 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
7488 {
7489 	struct tog_reflist_entry *re;
7490 	int i = 0;
7491 
7492 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7493 		return;
7494 
7495 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
7496 	while (i++ < maxscroll) {
7497 		if (re == NULL)
7498 			break;
7499 		s->first_displayed_entry = re;
7500 		re = TAILQ_PREV(re, tog_reflist_head, entry);
7501 	}
7502 }
7503 
7504 static const struct got_error *
7505 ref_scroll_down(struct tog_view *view, int maxscroll)
7506 {
7507 	struct tog_ref_view_state *s = &view->state.ref;
7508 	struct tog_reflist_entry *next, *last;
7509 	int n = 0;
7510 
7511 	if (s->first_displayed_entry)
7512 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
7513 	else
7514 		next = TAILQ_FIRST(&s->refs);
7515 
7516 	last = s->last_displayed_entry;
7517 	while (next && n++ < maxscroll) {
7518 		if (last) {
7519 			s->last_displayed_entry = last;
7520 			last = TAILQ_NEXT(last, entry);
7521 		}
7522 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN)) {
7523 			s->first_displayed_entry = next;
7524 			next = TAILQ_NEXT(next, entry);
7525 		}
7526 	}
7527 
7528 	return NULL;
7529 }
7530 
7531 static const struct got_error *
7532 search_start_ref_view(struct tog_view *view)
7533 {
7534 	struct tog_ref_view_state *s = &view->state.ref;
7535 
7536 	s->matched_entry = NULL;
7537 	return NULL;
7538 }
7539 
7540 static int
7541 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
7542 {
7543 	regmatch_t regmatch;
7544 
7545 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
7546 	    0) == 0;
7547 }
7548 
7549 static const struct got_error *
7550 search_next_ref_view(struct tog_view *view)
7551 {
7552 	struct tog_ref_view_state *s = &view->state.ref;
7553 	struct tog_reflist_entry *re = NULL;
7554 
7555 	if (!view->searching) {
7556 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7557 		return NULL;
7558 	}
7559 
7560 	if (s->matched_entry) {
7561 		if (view->searching == TOG_SEARCH_FORWARD) {
7562 			if (s->selected_entry)
7563 				re = TAILQ_NEXT(s->selected_entry, entry);
7564 			else
7565 				re = TAILQ_PREV(s->selected_entry,
7566 				    tog_reflist_head, entry);
7567 		} else {
7568 			if (s->selected_entry == NULL)
7569 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7570 			else
7571 				re = TAILQ_PREV(s->selected_entry,
7572 				    tog_reflist_head, entry);
7573 		}
7574 	} else {
7575 		if (s->selected_entry)
7576 			re = s->selected_entry;
7577 		else if (view->searching == TOG_SEARCH_FORWARD)
7578 			re = TAILQ_FIRST(&s->refs);
7579 		else
7580 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
7581 	}
7582 
7583 	while (1) {
7584 		if (re == NULL) {
7585 			if (s->matched_entry == NULL) {
7586 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7587 				return NULL;
7588 			}
7589 			if (view->searching == TOG_SEARCH_FORWARD)
7590 				re = TAILQ_FIRST(&s->refs);
7591 			else
7592 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7593 		}
7594 
7595 		if (match_reflist_entry(re, &view->regex)) {
7596 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7597 			s->matched_entry = re;
7598 			break;
7599 		}
7600 
7601 		if (view->searching == TOG_SEARCH_FORWARD)
7602 			re = TAILQ_NEXT(re, entry);
7603 		else
7604 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7605 	}
7606 
7607 	if (s->matched_entry) {
7608 		s->first_displayed_entry = s->matched_entry;
7609 		s->selected = 0;
7610 	}
7611 
7612 	return NULL;
7613 }
7614 
7615 static const struct got_error *
7616 show_ref_view(struct tog_view *view)
7617 {
7618 	const struct got_error *err = NULL;
7619 	struct tog_ref_view_state *s = &view->state.ref;
7620 	struct tog_reflist_entry *re;
7621 	char *line = NULL;
7622 	wchar_t *wline;
7623 	struct tog_color *tc;
7624 	int width, n;
7625 	int limit = view->nlines;
7626 
7627 	werase(view->window);
7628 
7629 	s->ndisplayed = 0;
7630 	if (view_is_hsplit_top(view))
7631 		--limit;  /* border */
7632 
7633 	if (limit == 0)
7634 		return NULL;
7635 
7636 	re = s->first_displayed_entry;
7637 
7638 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
7639 	    s->nrefs) == -1)
7640 		return got_error_from_errno("asprintf");
7641 
7642 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
7643 	if (err) {
7644 		free(line);
7645 		return err;
7646 	}
7647 	if (view_needs_focus_indication(view))
7648 		wstandout(view->window);
7649 	waddwstr(view->window, wline);
7650 	if (view_needs_focus_indication(view))
7651 		wstandend(view->window);
7652 	free(wline);
7653 	wline = NULL;
7654 	free(line);
7655 	line = NULL;
7656 	if (width < view->ncols - 1)
7657 		waddch(view->window, '\n');
7658 	if (--limit <= 0)
7659 		return NULL;
7660 
7661 	n = 0;
7662 	while (re && limit > 0) {
7663 		char *line = NULL;
7664 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
7665 
7666 		if (s->show_date) {
7667 			struct got_commit_object *ci;
7668 			struct got_tag_object *tag;
7669 			struct got_object_id *id;
7670 			struct tm tm;
7671 			time_t t;
7672 
7673 			err = got_ref_resolve(&id, s->repo, re->ref);
7674 			if (err)
7675 				return err;
7676 			err = got_object_open_as_tag(&tag, s->repo, id);
7677 			if (err) {
7678 				if (err->code != GOT_ERR_OBJ_TYPE) {
7679 					free(id);
7680 					return err;
7681 				}
7682 				err = got_object_open_as_commit(&ci, s->repo,
7683 				    id);
7684 				if (err) {
7685 					free(id);
7686 					return err;
7687 				}
7688 				t = got_object_commit_get_committer_time(ci);
7689 				got_object_commit_close(ci);
7690 			} else {
7691 				t = got_object_tag_get_tagger_time(tag);
7692 				got_object_tag_close(tag);
7693 			}
7694 			free(id);
7695 			if (gmtime_r(&t, &tm) == NULL)
7696 				return got_error_from_errno("gmtime_r");
7697 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
7698 				return got_error(GOT_ERR_NO_SPACE);
7699 		}
7700 		if (got_ref_is_symbolic(re->ref)) {
7701 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
7702 			    ymd : "", got_ref_get_name(re->ref),
7703 			    got_ref_get_symref_target(re->ref)) == -1)
7704 				return got_error_from_errno("asprintf");
7705 		} else if (s->show_ids) {
7706 			struct got_object_id *id;
7707 			char *id_str;
7708 			err = got_ref_resolve(&id, s->repo, re->ref);
7709 			if (err)
7710 				return err;
7711 			err = got_object_id_str(&id_str, id);
7712 			if (err) {
7713 				free(id);
7714 				return err;
7715 			}
7716 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
7717 			    got_ref_get_name(re->ref), id_str) == -1) {
7718 				err = got_error_from_errno("asprintf");
7719 				free(id);
7720 				free(id_str);
7721 				return err;
7722 			}
7723 			free(id);
7724 			free(id_str);
7725 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
7726 		    got_ref_get_name(re->ref)) == -1)
7727 			return got_error_from_errno("asprintf");
7728 
7729 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
7730 		    0, 0);
7731 		if (err) {
7732 			free(line);
7733 			return err;
7734 		}
7735 		if (n == s->selected) {
7736 			if (view->focussed)
7737 				wstandout(view->window);
7738 			s->selected_entry = re;
7739 		}
7740 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
7741 		if (tc)
7742 			wattr_on(view->window,
7743 			    COLOR_PAIR(tc->colorpair), NULL);
7744 		waddwstr(view->window, wline);
7745 		if (tc)
7746 			wattr_off(view->window,
7747 			    COLOR_PAIR(tc->colorpair), NULL);
7748 		if (width < view->ncols - 1)
7749 			waddch(view->window, '\n');
7750 		if (n == s->selected && view->focussed)
7751 			wstandend(view->window);
7752 		free(line);
7753 		free(wline);
7754 		wline = NULL;
7755 		n++;
7756 		s->ndisplayed++;
7757 		s->last_displayed_entry = re;
7758 
7759 		limit--;
7760 		re = TAILQ_NEXT(re, entry);
7761 	}
7762 
7763 	view_border(view);
7764 	return err;
7765 }
7766 
7767 static const struct got_error *
7768 browse_ref_tree(struct tog_view **new_view, int begin_y, int begin_x,
7769     struct tog_reflist_entry *re, struct got_repository *repo)
7770 {
7771 	const struct got_error *err = NULL;
7772 	struct got_object_id *commit_id = NULL;
7773 	struct tog_view *tree_view;
7774 
7775 	*new_view = NULL;
7776 
7777 	err = resolve_reflist_entry(&commit_id, re, repo);
7778 	if (err) {
7779 		if (err->code != GOT_ERR_OBJ_TYPE)
7780 			return err;
7781 		else
7782 			return NULL;
7783 	}
7784 
7785 
7786 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
7787 	if (tree_view == NULL) {
7788 		err = got_error_from_errno("view_open");
7789 		goto done;
7790 	}
7791 
7792 	err = open_tree_view(tree_view, commit_id,
7793 	    got_ref_get_name(re->ref), repo);
7794 	if (err)
7795 		goto done;
7796 
7797 	*new_view = tree_view;
7798 done:
7799 	free(commit_id);
7800 	return err;
7801 }
7802 
7803 static const struct got_error *
7804 ref_goto_line(struct tog_view *view, int nlines)
7805 {
7806 	const struct got_error		*err = NULL;
7807 	struct tog_ref_view_state	*s = &view->state.ref;
7808 	int				 g, idx = s->selected_entry->idx;
7809 
7810 	g = view->gline;
7811 	view->gline = 0;
7812 
7813 	if (g == 0)
7814 		g = 1;
7815 	else if (g > s->nrefs)
7816 		g = s->nrefs;
7817 
7818 	if (g >= s->first_displayed_entry->idx + 1 &&
7819 	    g <= s->last_displayed_entry->idx + 1 &&
7820 	    g - s->first_displayed_entry->idx - 1 < nlines) {
7821 		s->selected = g - s->first_displayed_entry->idx - 1;
7822 		return NULL;
7823 	}
7824 
7825 	if (idx + 1 < g) {
7826 		err = ref_scroll_down(view, g - idx - 1);
7827 		if (err)
7828 			return err;
7829 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL &&
7830 		    s->first_displayed_entry->idx + s->selected < g &&
7831 		    s->selected < s->ndisplayed - 1)
7832 			s->selected = g - s->first_displayed_entry->idx - 1;
7833 	} else if (idx + 1 > g)
7834 		ref_scroll_up(s, idx - g + 1);
7835 
7836 	if (g < nlines && s->first_displayed_entry->idx == 0)
7837 		s->selected = g - 1;
7838 
7839 	return NULL;
7840 
7841 }
7842 
7843 static const struct got_error *
7844 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
7845 {
7846 	const struct got_error *err = NULL;
7847 	struct tog_ref_view_state *s = &view->state.ref;
7848 	struct tog_reflist_entry *re;
7849 	int n, nscroll = view->nlines - 1;
7850 
7851 	if (view->gline)
7852 		return ref_goto_line(view, nscroll);
7853 
7854 	switch (ch) {
7855 	case 'i':
7856 		s->show_ids = !s->show_ids;
7857 		view->count = 0;
7858 		break;
7859 	case 'm':
7860 		s->show_date = !s->show_date;
7861 		view->count = 0;
7862 		break;
7863 	case 'o':
7864 		s->sort_by_date = !s->sort_by_date;
7865 		view->count = 0;
7866 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
7867 		    got_ref_cmp_by_commit_timestamp_descending :
7868 		    tog_ref_cmp_by_name, s->repo);
7869 		if (err)
7870 			break;
7871 		got_reflist_object_id_map_free(tog_refs_idmap);
7872 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
7873 		    &tog_refs, s->repo);
7874 		if (err)
7875 			break;
7876 		ref_view_free_refs(s);
7877 		err = ref_view_load_refs(s);
7878 		break;
7879 	case KEY_ENTER:
7880 	case '\r':
7881 		view->count = 0;
7882 		if (!s->selected_entry)
7883 			break;
7884 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
7885 		break;
7886 	case 'T':
7887 		view->count = 0;
7888 		if (!s->selected_entry)
7889 			break;
7890 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
7891 		break;
7892 	case 'g':
7893 	case KEY_HOME:
7894 		s->selected = 0;
7895 		view->count = 0;
7896 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7897 		break;
7898 	case 'G':
7899 	case KEY_END: {
7900 		int eos = view->nlines - 1;
7901 
7902 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
7903 			--eos;  /* border */
7904 		s->selected = 0;
7905 		view->count = 0;
7906 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
7907 		for (n = 0; n < eos; n++) {
7908 			if (re == NULL)
7909 				break;
7910 			s->first_displayed_entry = re;
7911 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7912 		}
7913 		if (n > 0)
7914 			s->selected = n - 1;
7915 		break;
7916 	}
7917 	case 'k':
7918 	case KEY_UP:
7919 	case CTRL('p'):
7920 		if (s->selected > 0) {
7921 			s->selected--;
7922 			break;
7923 		}
7924 		ref_scroll_up(s, 1);
7925 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7926 			view->count = 0;
7927 		break;
7928 	case CTRL('u'):
7929 	case 'u':
7930 		nscroll /= 2;
7931 		/* FALL THROUGH */
7932 	case KEY_PPAGE:
7933 	case CTRL('b'):
7934 	case 'b':
7935 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7936 			s->selected -= MIN(nscroll, s->selected);
7937 		ref_scroll_up(s, MAX(0, nscroll));
7938 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7939 			view->count = 0;
7940 		break;
7941 	case 'j':
7942 	case KEY_DOWN:
7943 	case CTRL('n'):
7944 		if (s->selected < s->ndisplayed - 1) {
7945 			s->selected++;
7946 			break;
7947 		}
7948 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7949 			/* can't scroll any further */
7950 			view->count = 0;
7951 			break;
7952 		}
7953 		ref_scroll_down(view, 1);
7954 		break;
7955 	case CTRL('d'):
7956 	case 'd':
7957 		nscroll /= 2;
7958 		/* FALL THROUGH */
7959 	case KEY_NPAGE:
7960 	case CTRL('f'):
7961 	case 'f':
7962 	case ' ':
7963 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7964 			/* can't scroll any further; move cursor down */
7965 			if (s->selected < s->ndisplayed - 1)
7966 				s->selected += MIN(nscroll,
7967 				    s->ndisplayed - s->selected - 1);
7968 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7969 				s->selected += s->ndisplayed - s->selected - 1;
7970 			view->count = 0;
7971 			break;
7972 		}
7973 		ref_scroll_down(view, nscroll);
7974 		break;
7975 	case CTRL('l'):
7976 		view->count = 0;
7977 		tog_free_refs();
7978 		err = tog_load_refs(s->repo, s->sort_by_date);
7979 		if (err)
7980 			break;
7981 		ref_view_free_refs(s);
7982 		err = ref_view_load_refs(s);
7983 		break;
7984 	case KEY_RESIZE:
7985 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7986 			s->selected = view->nlines - 2;
7987 		break;
7988 	default:
7989 		view->count = 0;
7990 		break;
7991 	}
7992 
7993 	return err;
7994 }
7995 
7996 __dead static void
7997 usage_ref(void)
7998 {
7999 	endwin();
8000 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
8001 	    getprogname());
8002 	exit(1);
8003 }
8004 
8005 static const struct got_error *
8006 cmd_ref(int argc, char *argv[])
8007 {
8008 	const struct got_error *error;
8009 	struct got_repository *repo = NULL;
8010 	struct got_worktree *worktree = NULL;
8011 	char *cwd = NULL, *repo_path = NULL;
8012 	int ch;
8013 	struct tog_view *view;
8014 	int *pack_fds = NULL;
8015 
8016 	while ((ch = getopt(argc, argv, "r:")) != -1) {
8017 		switch (ch) {
8018 		case 'r':
8019 			repo_path = realpath(optarg, NULL);
8020 			if (repo_path == NULL)
8021 				return got_error_from_errno2("realpath",
8022 				    optarg);
8023 			break;
8024 		default:
8025 			usage_ref();
8026 			/* NOTREACHED */
8027 		}
8028 	}
8029 
8030 	argc -= optind;
8031 	argv += optind;
8032 
8033 	if (argc > 1)
8034 		usage_ref();
8035 
8036 	error = got_repo_pack_fds_open(&pack_fds);
8037 	if (error != NULL)
8038 		goto done;
8039 
8040 	if (repo_path == NULL) {
8041 		cwd = getcwd(NULL, 0);
8042 		if (cwd == NULL)
8043 			return got_error_from_errno("getcwd");
8044 		error = got_worktree_open(&worktree, cwd);
8045 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
8046 			goto done;
8047 		if (worktree)
8048 			repo_path =
8049 			    strdup(got_worktree_get_repo_path(worktree));
8050 		else
8051 			repo_path = strdup(cwd);
8052 		if (repo_path == NULL) {
8053 			error = got_error_from_errno("strdup");
8054 			goto done;
8055 		}
8056 	}
8057 
8058 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8059 	if (error != NULL)
8060 		goto done;
8061 
8062 	init_curses();
8063 
8064 	error = apply_unveil(got_repo_get_path(repo), NULL);
8065 	if (error)
8066 		goto done;
8067 
8068 	error = tog_load_refs(repo, 0);
8069 	if (error)
8070 		goto done;
8071 
8072 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
8073 	if (view == NULL) {
8074 		error = got_error_from_errno("view_open");
8075 		goto done;
8076 	}
8077 
8078 	error = open_ref_view(view, repo);
8079 	if (error)
8080 		goto done;
8081 
8082 	if (worktree) {
8083 		/* Release work tree lock. */
8084 		got_worktree_close(worktree);
8085 		worktree = NULL;
8086 	}
8087 	error = view_loop(view);
8088 done:
8089 	free(repo_path);
8090 	free(cwd);
8091 	if (repo) {
8092 		const struct got_error *close_err = got_repo_close(repo);
8093 		if (close_err)
8094 			error = close_err;
8095 	}
8096 	if (pack_fds) {
8097 		const struct got_error *pack_err =
8098 		    got_repo_pack_fds_close(pack_fds);
8099 		if (error == NULL)
8100 			error = pack_err;
8101 	}
8102 	tog_free_refs();
8103 	return error;
8104 }
8105 
8106 static const struct got_error *
8107 view_dispatch_request(struct tog_view **new_view, struct tog_view *view,
8108     enum tog_view_type request, int y, int x)
8109 {
8110 	const struct got_error *err = NULL;
8111 
8112 	*new_view = NULL;
8113 
8114 	switch (request) {
8115 	case TOG_VIEW_DIFF:
8116 		if (view->type == TOG_VIEW_LOG) {
8117 			struct tog_log_view_state *s = &view->state.log;
8118 
8119 			err = open_diff_view_for_commit(new_view, y, x,
8120 			    s->selected_entry->commit, s->selected_entry->id,
8121 			    view, s->repo);
8122 		} else
8123 			return got_error_msg(GOT_ERR_NOT_IMPL,
8124 			    "parent/child view pair not supported");
8125 		break;
8126 	case TOG_VIEW_BLAME:
8127 		if (view->type == TOG_VIEW_TREE) {
8128 			struct tog_tree_view_state *s = &view->state.tree;
8129 
8130 			err = blame_tree_entry(new_view, y, x,
8131 			    s->selected_entry, &s->parents, s->commit_id,
8132 			    s->repo);
8133 		} else
8134 			return got_error_msg(GOT_ERR_NOT_IMPL,
8135 			    "parent/child view pair not supported");
8136 		break;
8137 	case TOG_VIEW_LOG:
8138 		if (view->type == TOG_VIEW_BLAME)
8139 			err = log_annotated_line(new_view, y, x,
8140 			    view->state.blame.repo, view->state.blame.id_to_log);
8141 		else if (view->type == TOG_VIEW_TREE)
8142 			err = log_selected_tree_entry(new_view, y, x,
8143 			    &view->state.tree);
8144 		else if (view->type == TOG_VIEW_REF)
8145 			err = log_ref_entry(new_view, y, x,
8146 			    view->state.ref.selected_entry,
8147 			    view->state.ref.repo);
8148 		else
8149 			return got_error_msg(GOT_ERR_NOT_IMPL,
8150 			    "parent/child view pair not supported");
8151 		break;
8152 	case TOG_VIEW_TREE:
8153 		if (view->type == TOG_VIEW_LOG)
8154 			err = browse_commit_tree(new_view, y, x,
8155 			    view->state.log.selected_entry,
8156 			    view->state.log.in_repo_path,
8157 			    view->state.log.head_ref_name,
8158 			    view->state.log.repo);
8159 		else if (view->type == TOG_VIEW_REF)
8160 			err = browse_ref_tree(new_view, y, x,
8161 			    view->state.ref.selected_entry,
8162 			    view->state.ref.repo);
8163 		else
8164 			return got_error_msg(GOT_ERR_NOT_IMPL,
8165 			    "parent/child view pair not supported");
8166 		break;
8167 	case TOG_VIEW_REF:
8168 		*new_view = view_open(0, 0, y, x, TOG_VIEW_REF);
8169 		if (*new_view == NULL)
8170 			return got_error_from_errno("view_open");
8171 		if (view->type == TOG_VIEW_LOG)
8172 			err = open_ref_view(*new_view, view->state.log.repo);
8173 		else if (view->type == TOG_VIEW_TREE)
8174 			err = open_ref_view(*new_view, view->state.tree.repo);
8175 		else
8176 			err = got_error_msg(GOT_ERR_NOT_IMPL,
8177 			    "parent/child view pair not supported");
8178 		if (err)
8179 			view_close(*new_view);
8180 		break;
8181 	default:
8182 		return got_error_msg(GOT_ERR_NOT_IMPL, "invalid view");
8183 	}
8184 
8185 	return err;
8186 }
8187 
8188 /*
8189  * If view was scrolled down to move the selected line into view when opening a
8190  * horizontal split, scroll back up when closing the split/toggling fullscreen.
8191  */
8192 static void
8193 offset_selection_up(struct tog_view *view)
8194 {
8195 	switch (view->type) {
8196 	case TOG_VIEW_BLAME: {
8197 		struct tog_blame_view_state *s = &view->state.blame;
8198 		if (s->first_displayed_line == 1) {
8199 			s->selected_line = MAX(s->selected_line - view->offset,
8200 			    1);
8201 			break;
8202 		}
8203 		if (s->first_displayed_line > view->offset)
8204 			s->first_displayed_line -= view->offset;
8205 		else
8206 			s->first_displayed_line = 1;
8207 		s->selected_line += view->offset;
8208 		break;
8209 	}
8210 	case TOG_VIEW_LOG:
8211 		log_scroll_up(&view->state.log, view->offset);
8212 		view->state.log.selected += view->offset;
8213 		break;
8214 	case TOG_VIEW_REF:
8215 		ref_scroll_up(&view->state.ref, view->offset);
8216 		view->state.ref.selected += view->offset;
8217 		break;
8218 	case TOG_VIEW_TREE:
8219 		tree_scroll_up(&view->state.tree, view->offset);
8220 		view->state.tree.selected += view->offset;
8221 		break;
8222 	default:
8223 		break;
8224 	}
8225 
8226 	view->offset = 0;
8227 }
8228 
8229 /*
8230  * If the selected line is in the section of screen covered by the bottom split,
8231  * scroll down offset lines to move it into view and index its new position.
8232  */
8233 static const struct got_error *
8234 offset_selection_down(struct tog_view *view)
8235 {
8236 	const struct got_error	*err = NULL;
8237 	const struct got_error	*(*scrolld)(struct tog_view *, int);
8238 	int			*selected = NULL;
8239 	int			 header, offset;
8240 
8241 	switch (view->type) {
8242 	case TOG_VIEW_BLAME: {
8243 		struct tog_blame_view_state *s = &view->state.blame;
8244 		header = 3;
8245 		scrolld = NULL;
8246 		if (s->selected_line > view->nlines - header) {
8247 			offset = abs(view->nlines - s->selected_line - header);
8248 			s->first_displayed_line += offset;
8249 			s->selected_line -= offset;
8250 			view->offset = offset;
8251 		}
8252 		break;
8253 	}
8254 	case TOG_VIEW_LOG: {
8255 		struct tog_log_view_state *s = &view->state.log;
8256 		scrolld = &log_scroll_down;
8257 		header = view_is_parent_view(view) ? 3 : 2;
8258 		selected = &s->selected;
8259 		break;
8260 	}
8261 	case TOG_VIEW_REF: {
8262 		struct tog_ref_view_state *s = &view->state.ref;
8263 		scrolld = &ref_scroll_down;
8264 		header = 3;
8265 		selected = &s->selected;
8266 		break;
8267 	}
8268 	case TOG_VIEW_TREE: {
8269 		struct tog_tree_view_state *s = &view->state.tree;
8270 		scrolld = &tree_scroll_down;
8271 		header = 5;
8272 		selected = &s->selected;
8273 		break;
8274 	}
8275 	default:
8276 		selected = NULL;
8277 		scrolld = NULL;
8278 		header = 0;
8279 		break;
8280 	}
8281 
8282 	if (selected && *selected > view->nlines - header) {
8283 		offset = abs(view->nlines - *selected - header);
8284 		view->offset = offset;
8285 		if (scrolld && offset) {
8286 			err = scrolld(view, offset);
8287 			*selected -= offset;
8288 		}
8289 	}
8290 
8291 	return err;
8292 }
8293 
8294 static void
8295 list_commands(FILE *fp)
8296 {
8297 	size_t i;
8298 
8299 	fprintf(fp, "commands:");
8300 	for (i = 0; i < nitems(tog_commands); i++) {
8301 		const struct tog_cmd *cmd = &tog_commands[i];
8302 		fprintf(fp, " %s", cmd->name);
8303 	}
8304 	fputc('\n', fp);
8305 }
8306 
8307 __dead static void
8308 usage(int hflag, int status)
8309 {
8310 	FILE *fp = (status == 0) ? stdout : stderr;
8311 
8312 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
8313 	    getprogname());
8314 	if (hflag) {
8315 		fprintf(fp, "lazy usage: %s path\n", getprogname());
8316 		list_commands(fp);
8317 	}
8318 	exit(status);
8319 }
8320 
8321 static char **
8322 make_argv(int argc, ...)
8323 {
8324 	va_list ap;
8325 	char **argv;
8326 	int i;
8327 
8328 	va_start(ap, argc);
8329 
8330 	argv = calloc(argc, sizeof(char *));
8331 	if (argv == NULL)
8332 		err(1, "calloc");
8333 	for (i = 0; i < argc; i++) {
8334 		argv[i] = strdup(va_arg(ap, char *));
8335 		if (argv[i] == NULL)
8336 			err(1, "strdup");
8337 	}
8338 
8339 	va_end(ap);
8340 	return argv;
8341 }
8342 
8343 /*
8344  * Try to convert 'tog path' into a 'tog log path' command.
8345  * The user could simply have mistyped the command rather than knowingly
8346  * provided a path. So check whether argv[0] can in fact be resolved
8347  * to a path in the HEAD commit and print a special error if not.
8348  * This hack is for mpi@ <3
8349  */
8350 static const struct got_error *
8351 tog_log_with_path(int argc, char *argv[])
8352 {
8353 	const struct got_error *error = NULL, *close_err;
8354 	const struct tog_cmd *cmd = NULL;
8355 	struct got_repository *repo = NULL;
8356 	struct got_worktree *worktree = NULL;
8357 	struct got_object_id *commit_id = NULL, *id = NULL;
8358 	struct got_commit_object *commit = NULL;
8359 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
8360 	char *commit_id_str = NULL, **cmd_argv = NULL;
8361 	int *pack_fds = NULL;
8362 
8363 	cwd = getcwd(NULL, 0);
8364 	if (cwd == NULL)
8365 		return got_error_from_errno("getcwd");
8366 
8367 	error = got_repo_pack_fds_open(&pack_fds);
8368 	if (error != NULL)
8369 		goto done;
8370 
8371 	error = got_worktree_open(&worktree, cwd);
8372 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
8373 		goto done;
8374 
8375 	if (worktree)
8376 		repo_path = strdup(got_worktree_get_repo_path(worktree));
8377 	else
8378 		repo_path = strdup(cwd);
8379 	if (repo_path == NULL) {
8380 		error = got_error_from_errno("strdup");
8381 		goto done;
8382 	}
8383 
8384 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8385 	if (error != NULL)
8386 		goto done;
8387 
8388 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
8389 	    repo, worktree);
8390 	if (error)
8391 		goto done;
8392 
8393 	error = tog_load_refs(repo, 0);
8394 	if (error)
8395 		goto done;
8396 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
8397 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
8398 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
8399 	if (error)
8400 		goto done;
8401 
8402 	if (worktree) {
8403 		got_worktree_close(worktree);
8404 		worktree = NULL;
8405 	}
8406 
8407 	error = got_object_open_as_commit(&commit, repo, commit_id);
8408 	if (error)
8409 		goto done;
8410 
8411 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
8412 	if (error) {
8413 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
8414 			goto done;
8415 		fprintf(stderr, "%s: '%s' is no known command or path\n",
8416 		    getprogname(), argv[0]);
8417 		usage(1, 1);
8418 		/* not reached */
8419 	}
8420 
8421 	error = got_object_id_str(&commit_id_str, commit_id);
8422 	if (error)
8423 		goto done;
8424 
8425 	cmd = &tog_commands[0]; /* log */
8426 	argc = 4;
8427 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
8428 	error = cmd->cmd_main(argc, cmd_argv);
8429 done:
8430 	if (repo) {
8431 		close_err = got_repo_close(repo);
8432 		if (error == NULL)
8433 			error = close_err;
8434 	}
8435 	if (commit)
8436 		got_object_commit_close(commit);
8437 	if (worktree)
8438 		got_worktree_close(worktree);
8439 	if (pack_fds) {
8440 		const struct got_error *pack_err =
8441 		    got_repo_pack_fds_close(pack_fds);
8442 		if (error == NULL)
8443 			error = pack_err;
8444 	}
8445 	free(id);
8446 	free(commit_id_str);
8447 	free(commit_id);
8448 	free(cwd);
8449 	free(repo_path);
8450 	free(in_repo_path);
8451 	if (cmd_argv) {
8452 		int i;
8453 		for (i = 0; i < argc; i++)
8454 			free(cmd_argv[i]);
8455 		free(cmd_argv);
8456 	}
8457 	tog_free_refs();
8458 	return error;
8459 }
8460 
8461 int
8462 main(int argc, char *argv[])
8463 {
8464 	const struct got_error *error = NULL;
8465 	const struct tog_cmd *cmd = NULL;
8466 	int ch, hflag = 0, Vflag = 0;
8467 	char **cmd_argv = NULL;
8468 	static const struct option longopts[] = {
8469 	    { "version", no_argument, NULL, 'V' },
8470 	    { NULL, 0, NULL, 0}
8471 	};
8472 	char *diff_algo_str = NULL;
8473 
8474 	setlocale(LC_CTYPE, "");
8475 
8476 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
8477 		switch (ch) {
8478 		case 'h':
8479 			hflag = 1;
8480 			break;
8481 		case 'V':
8482 			Vflag = 1;
8483 			break;
8484 		default:
8485 			usage(hflag, 1);
8486 			/* NOTREACHED */
8487 		}
8488 	}
8489 
8490 	argc -= optind;
8491 	argv += optind;
8492 	optind = 1;
8493 	optreset = 1;
8494 
8495 	if (Vflag) {
8496 		got_version_print_str();
8497 		return 0;
8498 	}
8499 
8500 #ifndef PROFILE
8501 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
8502 	    NULL) == -1)
8503 		err(1, "pledge");
8504 #endif
8505 
8506 	if (argc == 0) {
8507 		if (hflag)
8508 			usage(hflag, 0);
8509 		/* Build an argument vector which runs a default command. */
8510 		cmd = &tog_commands[0];
8511 		argc = 1;
8512 		cmd_argv = make_argv(argc, cmd->name);
8513 	} else {
8514 		size_t i;
8515 
8516 		/* Did the user specify a command? */
8517 		for (i = 0; i < nitems(tog_commands); i++) {
8518 			if (strncmp(tog_commands[i].name, argv[0],
8519 			    strlen(argv[0])) == 0) {
8520 				cmd = &tog_commands[i];
8521 				break;
8522 			}
8523 		}
8524 	}
8525 
8526 	diff_algo_str = getenv("TOG_DIFF_ALGORITHM");
8527 	if (diff_algo_str) {
8528 		if (strcasecmp(diff_algo_str, "patience") == 0)
8529 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
8530 		if (strcasecmp(diff_algo_str, "myers") == 0)
8531 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
8532 	}
8533 
8534 	if (cmd == NULL) {
8535 		if (argc != 1)
8536 			usage(0, 1);
8537 		/* No command specified; try log with a path */
8538 		error = tog_log_with_path(argc, argv);
8539 	} else {
8540 		if (hflag)
8541 			cmd->cmd_usage();
8542 		else
8543 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
8544 	}
8545 
8546 	endwin();
8547 	putchar('\n');
8548 	if (cmd_argv) {
8549 		int i;
8550 		for (i = 0; i < argc; i++)
8551 			free(cmd_argv[i]);
8552 		free(cmd_argv);
8553 	}
8554 
8555 	if (error && error->code != GOT_ERR_CANCELLED)
8556 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
8557 	return 0;
8558 }