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) {
3183 		struct commit_queue_entry *entry;
3184 		int n;
3185 
3186 		s->selected = 0;
3187 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
3188 		s->last_displayed_entry = entry;
3189 		for (n = 0; n <= eos; n++) {
3190 			if (entry == NULL)
3191 				break;
3192 			s->first_displayed_entry = entry;
3193 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3194 		}
3195 		if (n > 0)
3196 			s->selected = n - 1;
3197 	} else {
3198 		if (s->last_displayed_entry->idx == s->commits.ncommits - 1 &&
3199 		    s->thread_args.log_complete)
3200 			s->selected += MIN(page,
3201 			    s->commits.ncommits - s->selected_entry->idx - 1);
3202 		else
3203 			err = log_scroll_down(view, page);
3204 	}
3205 	if (err)
3206 		return err;
3207 
3208 	/*
3209 	 * We might necessarily overshoot in horizontal
3210 	 * splits; if so, select the last displayed commit.
3211 	 */
3212 	s->selected = MIN(s->selected,
3213 	    s->last_displayed_entry->idx - s->first_displayed_entry->idx);
3214 
3215 	select_commit(s);
3216 
3217 	if (s->thread_args.log_complete &&
3218 	    s->selected_entry->idx == s->commits.ncommits - 1)
3219 		view->count = 0;
3220 
3221 	return NULL;
3222 }
3223 
3224 static void
3225 view_get_split(struct tog_view *view, int *y, int *x)
3226 {
3227 	*x = 0;
3228 	*y = 0;
3229 
3230 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
3231 		if (view->child && view->child->resized_y)
3232 			*y = view->child->resized_y;
3233 		else if (view->resized_y)
3234 			*y = view->resized_y;
3235 		else
3236 			*y = view_split_begin_y(view->lines);
3237 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
3238 		if (view->child && view->child->resized_x)
3239 			*x = view->child->resized_x;
3240 		else if (view->resized_x)
3241 			*x = view->resized_x;
3242 		else
3243 			*x = view_split_begin_x(view->begin_x);
3244 	}
3245 }
3246 
3247 /* Split view horizontally at y and offset view->state->selected line. */
3248 static const struct got_error *
3249 view_init_hsplit(struct tog_view *view, int y)
3250 {
3251 	const struct got_error *err = NULL;
3252 
3253 	view->nlines = y;
3254 	view->ncols = COLS;
3255 	err = view_resize(view);
3256 	if (err)
3257 		return err;
3258 
3259 	err = offset_selection_down(view);
3260 
3261 	return err;
3262 }
3263 
3264 static const struct got_error *
3265 log_goto_line(struct tog_view *view, int nlines)
3266 {
3267 	const struct got_error		*err = NULL;
3268 	struct tog_log_view_state	*s = &view->state.log;
3269 	int				 g, idx = s->selected_entry->idx;
3270 
3271 	g = view->gline;
3272 	view->gline = 0;
3273 
3274 	if (g >= s->first_displayed_entry->idx + 1 &&
3275 	    g <= s->last_displayed_entry->idx + 1 &&
3276 	    g - s->first_displayed_entry->idx - 1 < nlines) {
3277 		s->selected = g - s->first_displayed_entry->idx - 1;
3278 		select_commit(s);
3279 		return NULL;
3280 	}
3281 
3282 	if (idx + 1 < g) {
3283 		err = log_move_cursor_down(view, g - idx - 1);
3284 		if (!err && g > s->selected_entry->idx + 1)
3285 			err = log_move_cursor_down(view,
3286 			    g - s->first_displayed_entry->idx - 1);
3287 		if (err)
3288 			return err;
3289 	} else if (idx + 1 > g)
3290 		log_move_cursor_up(view, idx - g + 1, 0);
3291 
3292 	if (g < nlines && s->first_displayed_entry->idx == 0)
3293 		s->selected = g - 1;
3294 
3295 	select_commit(s);
3296 	return NULL;
3297 
3298 }
3299 
3300 static const struct got_error *
3301 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
3302 {
3303 	const struct got_error *err = NULL;
3304 	struct tog_log_view_state *s = &view->state.log;
3305 	int eos, nscroll;
3306 
3307 	if (s->thread_args.load_all) {
3308 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
3309 			s->thread_args.load_all = 0;
3310 		else if (s->thread_args.log_complete) {
3311 			err = log_move_cursor_down(view, s->commits.ncommits);
3312 			s->thread_args.load_all = 0;
3313 		}
3314 		return err;
3315 	}
3316 
3317 	eos = nscroll = view->nlines - 1;
3318 	if (view_is_hsplit_top(view))
3319 		--eos;  /* border */
3320 
3321 	if (view->gline)
3322 		return log_goto_line(view, eos);
3323 
3324 	switch (ch) {
3325 	case 'q':
3326 		s->quit = 1;
3327 		break;
3328 	case '0':
3329 		view->x = 0;
3330 		break;
3331 	case '$':
3332 		view->x = MAX(view->maxx - view->ncols / 2, 0);
3333 		view->count = 0;
3334 		break;
3335 	case KEY_RIGHT:
3336 	case 'l':
3337 		if (view->x + view->ncols / 2 < view->maxx)
3338 			view->x += 2;  /* move two columns right */
3339 		else
3340 			view->count = 0;
3341 		break;
3342 	case KEY_LEFT:
3343 	case 'h':
3344 		view->x -= MIN(view->x, 2);  /* move two columns back */
3345 		if (view->x <= 0)
3346 			view->count = 0;
3347 		break;
3348 	case 'k':
3349 	case KEY_UP:
3350 	case '<':
3351 	case ',':
3352 	case CTRL('p'):
3353 		log_move_cursor_up(view, 0, 0);
3354 		break;
3355 	case 'g':
3356 	case KEY_HOME:
3357 		log_move_cursor_up(view, 0, 1);
3358 		view->count = 0;
3359 		break;
3360 	case CTRL('u'):
3361 	case 'u':
3362 		nscroll /= 2;
3363 		/* FALL THROUGH */
3364 	case KEY_PPAGE:
3365 	case CTRL('b'):
3366 	case 'b':
3367 		log_move_cursor_up(view, nscroll, 0);
3368 		break;
3369 	case 'j':
3370 	case KEY_DOWN:
3371 	case '>':
3372 	case '.':
3373 	case CTRL('n'):
3374 		err = log_move_cursor_down(view, 0);
3375 		break;
3376 	case '@':
3377 		s->use_committer = !s->use_committer;
3378 		break;
3379 	case 'G':
3380 	case KEY_END: {
3381 		/* We don't know yet how many commits, so we're forced to
3382 		 * traverse them all. */
3383 		view->count = 0;
3384 		s->thread_args.load_all = 1;
3385 		if (!s->thread_args.log_complete)
3386 			return trigger_log_thread(view, 0);
3387 		err = log_move_cursor_down(view, s->commits.ncommits);
3388 		s->thread_args.load_all = 0;
3389 		break;
3390 	}
3391 	case CTRL('d'):
3392 	case 'd':
3393 		nscroll /= 2;
3394 		/* FALL THROUGH */
3395 	case KEY_NPAGE:
3396 	case CTRL('f'):
3397 	case 'f':
3398 	case ' ':
3399 		err = log_move_cursor_down(view, nscroll);
3400 		break;
3401 	case KEY_RESIZE:
3402 		if (s->selected > view->nlines - 2)
3403 			s->selected = view->nlines - 2;
3404 		if (s->selected > s->commits.ncommits - 1)
3405 			s->selected = s->commits.ncommits - 1;
3406 		select_commit(s);
3407 		if (s->commits.ncommits < view->nlines - 1 &&
3408 		    !s->thread_args.log_complete) {
3409 			s->thread_args.commits_needed += (view->nlines - 1) -
3410 			    s->commits.ncommits;
3411 			err = trigger_log_thread(view, 1);
3412 		}
3413 		break;
3414 	case KEY_ENTER:
3415 	case '\r':
3416 		view->count = 0;
3417 		if (s->selected_entry == NULL)
3418 			break;
3419 		err = view_request_new(new_view, view, TOG_VIEW_DIFF);
3420 		break;
3421 	case 'T':
3422 		view->count = 0;
3423 		if (s->selected_entry == NULL)
3424 			break;
3425 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
3426 		break;
3427 	case KEY_BACKSPACE:
3428 	case CTRL('l'):
3429 	case 'B':
3430 		view->count = 0;
3431 		if (ch == KEY_BACKSPACE &&
3432 		    got_path_is_root_dir(s->in_repo_path))
3433 			break;
3434 		err = stop_log_thread(s);
3435 		if (err)
3436 			return err;
3437 		if (ch == KEY_BACKSPACE) {
3438 			char *parent_path;
3439 			err = got_path_dirname(&parent_path, s->in_repo_path);
3440 			if (err)
3441 				return err;
3442 			free(s->in_repo_path);
3443 			s->in_repo_path = parent_path;
3444 			s->thread_args.in_repo_path = s->in_repo_path;
3445 		} else if (ch == CTRL('l')) {
3446 			struct got_object_id *start_id;
3447 			err = got_repo_match_object_id(&start_id, NULL,
3448 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
3449 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
3450 			if (err)
3451 				return err;
3452 			free(s->start_id);
3453 			s->start_id = start_id;
3454 			s->thread_args.start_id = s->start_id;
3455 		} else /* 'B' */
3456 			s->log_branches = !s->log_branches;
3457 
3458 		if (s->thread_args.pack_fds == NULL) {
3459 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3460 			if (err)
3461 				return err;
3462 		}
3463 		err = got_repo_open(&s->thread_args.repo,
3464 		    got_repo_get_path(s->repo), NULL,
3465 		    s->thread_args.pack_fds);
3466 		if (err)
3467 			return err;
3468 		tog_free_refs();
3469 		err = tog_load_refs(s->repo, 0);
3470 		if (err)
3471 			return err;
3472 		err = got_commit_graph_open(&s->thread_args.graph,
3473 		    s->in_repo_path, !s->log_branches);
3474 		if (err)
3475 			return err;
3476 		err = got_commit_graph_iter_start(s->thread_args.graph,
3477 		    s->start_id, s->repo, NULL, NULL);
3478 		if (err)
3479 			return err;
3480 		free_commits(&s->commits);
3481 		s->first_displayed_entry = NULL;
3482 		s->last_displayed_entry = NULL;
3483 		s->selected_entry = NULL;
3484 		s->selected = 0;
3485 		s->thread_args.log_complete = 0;
3486 		s->quit = 0;
3487 		s->thread_args.commits_needed = view->lines;
3488 		s->matched_entry = NULL;
3489 		s->search_entry = NULL;
3490 		view->offset = 0;
3491 		break;
3492 	case 'R':
3493 		view->count = 0;
3494 		err = view_request_new(new_view, view, TOG_VIEW_REF);
3495 		break;
3496 	default:
3497 		view->count = 0;
3498 		break;
3499 	}
3500 
3501 	return err;
3502 }
3503 
3504 static const struct got_error *
3505 apply_unveil(const char *repo_path, const char *worktree_path)
3506 {
3507 	const struct got_error *error;
3508 
3509 #ifdef PROFILE
3510 	if (unveil("gmon.out", "rwc") != 0)
3511 		return got_error_from_errno2("unveil", "gmon.out");
3512 #endif
3513 	if (repo_path && unveil(repo_path, "r") != 0)
3514 		return got_error_from_errno2("unveil", repo_path);
3515 
3516 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
3517 		return got_error_from_errno2("unveil", worktree_path);
3518 
3519 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
3520 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
3521 
3522 	error = got_privsep_unveil_exec_helpers();
3523 	if (error != NULL)
3524 		return error;
3525 
3526 	if (unveil(NULL, NULL) != 0)
3527 		return got_error_from_errno("unveil");
3528 
3529 	return NULL;
3530 }
3531 
3532 static void
3533 init_curses(void)
3534 {
3535 	/*
3536 	 * Override default signal handlers before starting ncurses.
3537 	 * This should prevent ncurses from installing its own
3538 	 * broken cleanup() signal handler.
3539 	 */
3540 	signal(SIGWINCH, tog_sigwinch);
3541 	signal(SIGPIPE, tog_sigpipe);
3542 	signal(SIGCONT, tog_sigcont);
3543 	signal(SIGINT, tog_sigint);
3544 	signal(SIGTERM, tog_sigterm);
3545 
3546 	initscr();
3547 	cbreak();
3548 	halfdelay(1); /* Do fast refresh while initial view is loading. */
3549 	noecho();
3550 	nonl();
3551 	intrflush(stdscr, FALSE);
3552 	keypad(stdscr, TRUE);
3553 	curs_set(0);
3554 	if (getenv("TOG_COLORS") != NULL) {
3555 		start_color();
3556 		use_default_colors();
3557 	}
3558 }
3559 
3560 static const struct got_error *
3561 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
3562     struct got_repository *repo, struct got_worktree *worktree)
3563 {
3564 	const struct got_error *err = NULL;
3565 
3566 	if (argc == 0) {
3567 		*in_repo_path = strdup("/");
3568 		if (*in_repo_path == NULL)
3569 			return got_error_from_errno("strdup");
3570 		return NULL;
3571 	}
3572 
3573 	if (worktree) {
3574 		const char *prefix = got_worktree_get_path_prefix(worktree);
3575 		char *p;
3576 
3577 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3578 		if (err)
3579 			return err;
3580 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3581 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3582 		    p) == -1) {
3583 			err = got_error_from_errno("asprintf");
3584 			*in_repo_path = NULL;
3585 		}
3586 		free(p);
3587 	} else
3588 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3589 
3590 	return err;
3591 }
3592 
3593 static const struct got_error *
3594 cmd_log(int argc, char *argv[])
3595 {
3596 	const struct got_error *error;
3597 	struct got_repository *repo = NULL;
3598 	struct got_worktree *worktree = NULL;
3599 	struct got_object_id *start_id = NULL;
3600 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3601 	char *start_commit = NULL, *label = NULL;
3602 	struct got_reference *ref = NULL;
3603 	const char *head_ref_name = NULL;
3604 	int ch, log_branches = 0;
3605 	struct tog_view *view;
3606 	int *pack_fds = NULL;
3607 
3608 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3609 		switch (ch) {
3610 		case 'b':
3611 			log_branches = 1;
3612 			break;
3613 		case 'c':
3614 			start_commit = optarg;
3615 			break;
3616 		case 'r':
3617 			repo_path = realpath(optarg, NULL);
3618 			if (repo_path == NULL)
3619 				return got_error_from_errno2("realpath",
3620 				    optarg);
3621 			break;
3622 		default:
3623 			usage_log();
3624 			/* NOTREACHED */
3625 		}
3626 	}
3627 
3628 	argc -= optind;
3629 	argv += optind;
3630 
3631 	if (argc > 1)
3632 		usage_log();
3633 
3634 	error = got_repo_pack_fds_open(&pack_fds);
3635 	if (error != NULL)
3636 		goto done;
3637 
3638 	if (repo_path == NULL) {
3639 		cwd = getcwd(NULL, 0);
3640 		if (cwd == NULL)
3641 			return got_error_from_errno("getcwd");
3642 		error = got_worktree_open(&worktree, cwd);
3643 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3644 			goto done;
3645 		if (worktree)
3646 			repo_path =
3647 			    strdup(got_worktree_get_repo_path(worktree));
3648 		else
3649 			repo_path = strdup(cwd);
3650 		if (repo_path == NULL) {
3651 			error = got_error_from_errno("strdup");
3652 			goto done;
3653 		}
3654 	}
3655 
3656 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3657 	if (error != NULL)
3658 		goto done;
3659 
3660 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3661 	    repo, worktree);
3662 	if (error)
3663 		goto done;
3664 
3665 	init_curses();
3666 
3667 	error = apply_unveil(got_repo_get_path(repo),
3668 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3669 	if (error)
3670 		goto done;
3671 
3672 	/* already loaded by tog_log_with_path()? */
3673 	if (TAILQ_EMPTY(&tog_refs)) {
3674 		error = tog_load_refs(repo, 0);
3675 		if (error)
3676 			goto done;
3677 	}
3678 
3679 	if (start_commit == NULL) {
3680 		error = got_repo_match_object_id(&start_id, &label,
3681 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3682 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3683 		if (error)
3684 			goto done;
3685 		head_ref_name = label;
3686 	} else {
3687 		error = got_ref_open(&ref, repo, start_commit, 0);
3688 		if (error == NULL)
3689 			head_ref_name = got_ref_get_name(ref);
3690 		else if (error->code != GOT_ERR_NOT_REF)
3691 			goto done;
3692 		error = got_repo_match_object_id(&start_id, NULL,
3693 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3694 		if (error)
3695 			goto done;
3696 	}
3697 
3698 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3699 	if (view == NULL) {
3700 		error = got_error_from_errno("view_open");
3701 		goto done;
3702 	}
3703 	error = open_log_view(view, start_id, repo, head_ref_name,
3704 	    in_repo_path, log_branches);
3705 	if (error)
3706 		goto done;
3707 	if (worktree) {
3708 		/* Release work tree lock. */
3709 		got_worktree_close(worktree);
3710 		worktree = NULL;
3711 	}
3712 	error = view_loop(view);
3713 done:
3714 	free(in_repo_path);
3715 	free(repo_path);
3716 	free(cwd);
3717 	free(start_id);
3718 	free(label);
3719 	if (ref)
3720 		got_ref_close(ref);
3721 	if (repo) {
3722 		const struct got_error *close_err = got_repo_close(repo);
3723 		if (error == NULL)
3724 			error = close_err;
3725 	}
3726 	if (worktree)
3727 		got_worktree_close(worktree);
3728 	if (pack_fds) {
3729 		const struct got_error *pack_err =
3730 		    got_repo_pack_fds_close(pack_fds);
3731 		if (error == NULL)
3732 			error = pack_err;
3733 	}
3734 	tog_free_refs();
3735 	return error;
3736 }
3737 
3738 __dead static void
3739 usage_diff(void)
3740 {
3741 	endwin();
3742 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3743 	    "[-w] object1 object2\n", getprogname());
3744 	exit(1);
3745 }
3746 
3747 static int
3748 match_line(const char *line, regex_t *regex, size_t nmatch,
3749     regmatch_t *regmatch)
3750 {
3751 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3752 }
3753 
3754 static struct tog_color *
3755 match_color(struct tog_colors *colors, const char *line)
3756 {
3757 	struct tog_color *tc = NULL;
3758 
3759 	STAILQ_FOREACH(tc, colors, entry) {
3760 		if (match_line(line, &tc->regex, 0, NULL))
3761 			return tc;
3762 	}
3763 
3764 	return NULL;
3765 }
3766 
3767 static const struct got_error *
3768 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3769     WINDOW *window, int skipcol, regmatch_t *regmatch)
3770 {
3771 	const struct got_error *err = NULL;
3772 	char *exstr = NULL;
3773 	wchar_t *wline = NULL;
3774 	int rme, rms, n, width, scrollx;
3775 	int width0 = 0, width1 = 0, width2 = 0;
3776 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3777 
3778 	*wtotal = 0;
3779 
3780 	rms = regmatch->rm_so;
3781 	rme = regmatch->rm_eo;
3782 
3783 	err = expand_tab(&exstr, line);
3784 	if (err)
3785 		return err;
3786 
3787 	/* Split the line into 3 segments, according to match offsets. */
3788 	seg0 = strndup(exstr, rms);
3789 	if (seg0 == NULL) {
3790 		err = got_error_from_errno("strndup");
3791 		goto done;
3792 	}
3793 	seg1 = strndup(exstr + rms, rme - rms);
3794 	if (seg1 == NULL) {
3795 		err = got_error_from_errno("strndup");
3796 		goto done;
3797 	}
3798 	seg2 = strdup(exstr + rme);
3799 	if (seg2 == NULL) {
3800 		err = got_error_from_errno("strndup");
3801 		goto done;
3802 	}
3803 
3804 	/* draw up to matched token if we haven't scrolled past it */
3805 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3806 	    col_tab_align, 1);
3807 	if (err)
3808 		goto done;
3809 	n = MAX(width0 - skipcol, 0);
3810 	if (n) {
3811 		free(wline);
3812 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3813 		    wlimit, col_tab_align, 1);
3814 		if (err)
3815 			goto done;
3816 		waddwstr(window, &wline[scrollx]);
3817 		wlimit -= width;
3818 		*wtotal += width;
3819 	}
3820 
3821 	if (wlimit > 0) {
3822 		int i = 0, w = 0;
3823 		size_t wlen;
3824 
3825 		free(wline);
3826 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3827 		    col_tab_align, 1);
3828 		if (err)
3829 			goto done;
3830 		wlen = wcslen(wline);
3831 		while (i < wlen) {
3832 			width = wcwidth(wline[i]);
3833 			if (width == -1) {
3834 				/* should not happen, tabs are expanded */
3835 				err = got_error(GOT_ERR_RANGE);
3836 				goto done;
3837 			}
3838 			if (width0 + w + width > skipcol)
3839 				break;
3840 			w += width;
3841 			i++;
3842 		}
3843 		/* draw (visible part of) matched token (if scrolled into it) */
3844 		if (width1 - w > 0) {
3845 			wattron(window, A_STANDOUT);
3846 			waddwstr(window, &wline[i]);
3847 			wattroff(window, A_STANDOUT);
3848 			wlimit -= (width1 - w);
3849 			*wtotal += (width1 - w);
3850 		}
3851 	}
3852 
3853 	if (wlimit > 0) {  /* draw rest of line */
3854 		free(wline);
3855 		if (skipcol > width0 + width1) {
3856 			err = format_line(&wline, &width2, &scrollx, seg2,
3857 			    skipcol - (width0 + width1), wlimit,
3858 			    col_tab_align, 1);
3859 			if (err)
3860 				goto done;
3861 			waddwstr(window, &wline[scrollx]);
3862 		} else {
3863 			err = format_line(&wline, &width2, NULL, seg2, 0,
3864 			    wlimit, col_tab_align, 1);
3865 			if (err)
3866 				goto done;
3867 			waddwstr(window, wline);
3868 		}
3869 		*wtotal += width2;
3870 	}
3871 done:
3872 	free(wline);
3873 	free(exstr);
3874 	free(seg0);
3875 	free(seg1);
3876 	free(seg2);
3877 	return err;
3878 }
3879 
3880 static int
3881 gotoline(struct tog_view *view, int *lineno, int *nprinted)
3882 {
3883 	FILE	*f = NULL;
3884 	int	*eof, *first, *selected;
3885 
3886 	if (view->type == TOG_VIEW_DIFF) {
3887 		struct tog_diff_view_state *s = &view->state.diff;
3888 
3889 		first = &s->first_displayed_line;
3890 		selected = first;
3891 		eof = &s->eof;
3892 		f = s->f;
3893 	} else if (view->type == TOG_VIEW_BLAME) {
3894 		struct tog_blame_view_state *s = &view->state.blame;
3895 
3896 		first = &s->first_displayed_line;
3897 		selected = &s->selected_line;
3898 		eof = &s->eof;
3899 		f = s->blame.f;
3900 	} else
3901 		return 0;
3902 
3903 	/* Center gline in the middle of the page like vi(1). */
3904 	if (*lineno < view->gline - (view->nlines - 3) / 2)
3905 		return 0;
3906 	if (*first != 1 && (*lineno > view->gline - (view->nlines - 3) / 2)) {
3907 		rewind(f);
3908 		*eof = 0;
3909 		*first = 1;
3910 		*lineno = 0;
3911 		*nprinted = 0;
3912 		return 0;
3913 	}
3914 
3915 	*selected = view->gline <= (view->nlines - 3) / 2 ?
3916 		view->gline : (view->nlines - 3) / 2 + 1;
3917 	view->gline = 0;
3918 
3919 	return 1;
3920 }
3921 
3922 static const struct got_error *
3923 draw_file(struct tog_view *view, const char *header)
3924 {
3925 	struct tog_diff_view_state *s = &view->state.diff;
3926 	regmatch_t *regmatch = &view->regmatch;
3927 	const struct got_error *err;
3928 	int nprinted = 0;
3929 	char *line;
3930 	size_t linesize = 0;
3931 	ssize_t linelen;
3932 	wchar_t *wline;
3933 	int width;
3934 	int max_lines = view->nlines;
3935 	int nlines = s->nlines;
3936 	off_t line_offset;
3937 
3938 	s->lineno = s->first_displayed_line - 1;
3939 	line_offset = s->lines[s->first_displayed_line - 1].offset;
3940 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3941 		return got_error_from_errno("fseek");
3942 
3943 	werase(view->window);
3944 
3945 	if (view->gline > s->nlines - 1)
3946 		view->gline = s->nlines - 1;
3947 
3948 	if (header) {
3949 		int ln = view->gline ? view->gline <= (view->nlines - 3) / 2 ?
3950 		    1 : view->gline - (view->nlines - 3) / 2 :
3951 		    s->lineno + s->selected_line;
3952 
3953 		if (asprintf(&line, "[%d/%d] %s", ln, nlines, header) == -1)
3954 			return got_error_from_errno("asprintf");
3955 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3956 		    0, 0);
3957 		free(line);
3958 		if (err)
3959 			return err;
3960 
3961 		if (view_needs_focus_indication(view))
3962 			wstandout(view->window);
3963 		waddwstr(view->window, wline);
3964 		free(wline);
3965 		wline = NULL;
3966 		if (view_needs_focus_indication(view))
3967 			wstandend(view->window);
3968 		if (width <= view->ncols - 1)
3969 			waddch(view->window, '\n');
3970 
3971 		if (max_lines <= 1)
3972 			return NULL;
3973 		max_lines--;
3974 	}
3975 
3976 	s->eof = 0;
3977 	view->maxx = 0;
3978 	line = NULL;
3979 	while (max_lines > 0 && nprinted < max_lines) {
3980 		enum got_diff_line_type linetype;
3981 		attr_t attr = 0;
3982 
3983 		linelen = getline(&line, &linesize, s->f);
3984 		if (linelen == -1) {
3985 			if (feof(s->f)) {
3986 				s->eof = 1;
3987 				break;
3988 			}
3989 			free(line);
3990 			return got_ferror(s->f, GOT_ERR_IO);
3991 		}
3992 
3993 		if (++s->lineno < s->first_displayed_line)
3994 			continue;
3995 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
3996 			continue;
3997 		if (s->lineno == view->hiline)
3998 			attr = A_STANDOUT;
3999 
4000 		/* Set view->maxx based on full line length. */
4001 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
4002 		    view->x ? 1 : 0);
4003 		if (err) {
4004 			free(line);
4005 			return err;
4006 		}
4007 		view->maxx = MAX(view->maxx, width);
4008 		free(wline);
4009 		wline = NULL;
4010 
4011 		linetype = s->lines[s->lineno].type;
4012 		if (linetype > GOT_DIFF_LINE_LOGMSG &&
4013 		    linetype < GOT_DIFF_LINE_CONTEXT)
4014 			attr |= COLOR_PAIR(linetype);
4015 		if (attr)
4016 			wattron(view->window, attr);
4017 		if (s->first_displayed_line + nprinted == s->matched_line &&
4018 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4019 			err = add_matched_line(&width, line, view->ncols, 0,
4020 			    view->window, view->x, regmatch);
4021 			if (err) {
4022 				free(line);
4023 				return err;
4024 			}
4025 		} else {
4026 			int skip;
4027 			err = format_line(&wline, &width, &skip, line,
4028 			    view->x, view->ncols, 0, view->x ? 1 : 0);
4029 			if (err) {
4030 				free(line);
4031 				return err;
4032 			}
4033 			waddwstr(view->window, &wline[skip]);
4034 			free(wline);
4035 			wline = NULL;
4036 		}
4037 		if (s->lineno == view->hiline) {
4038 			/* highlight full gline length */
4039 			while (width++ < view->ncols)
4040 				waddch(view->window, ' ');
4041 		} else {
4042 			if (width <= view->ncols - 1)
4043 				waddch(view->window, '\n');
4044 		}
4045 		if (attr)
4046 			wattroff(view->window, attr);
4047 		if (++nprinted == 1)
4048 			s->first_displayed_line = s->lineno;
4049 	}
4050 	free(line);
4051 	if (nprinted >= 1)
4052 		s->last_displayed_line = s->first_displayed_line +
4053 		    (nprinted - 1);
4054 	else
4055 		s->last_displayed_line = s->first_displayed_line;
4056 
4057 	view_border(view);
4058 
4059 	if (s->eof) {
4060 		while (nprinted < view->nlines) {
4061 			waddch(view->window, '\n');
4062 			nprinted++;
4063 		}
4064 
4065 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
4066 		    view->ncols, 0, 0);
4067 		if (err) {
4068 			return err;
4069 		}
4070 
4071 		wstandout(view->window);
4072 		waddwstr(view->window, wline);
4073 		free(wline);
4074 		wline = NULL;
4075 		wstandend(view->window);
4076 	}
4077 
4078 	return NULL;
4079 }
4080 
4081 static char *
4082 get_datestr(time_t *time, char *datebuf)
4083 {
4084 	struct tm mytm, *tm;
4085 	char *p, *s;
4086 
4087 	tm = gmtime_r(time, &mytm);
4088 	if (tm == NULL)
4089 		return NULL;
4090 	s = asctime_r(tm, datebuf);
4091 	if (s == NULL)
4092 		return NULL;
4093 	p = strchr(s, '\n');
4094 	if (p)
4095 		*p = '\0';
4096 	return s;
4097 }
4098 
4099 static const struct got_error *
4100 get_changed_paths(struct got_pathlist_head *paths,
4101     struct got_commit_object *commit, struct got_repository *repo)
4102 {
4103 	const struct got_error *err = NULL;
4104 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
4105 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
4106 	struct got_object_qid *qid;
4107 
4108 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
4109 	if (qid != NULL) {
4110 		struct got_commit_object *pcommit;
4111 		err = got_object_open_as_commit(&pcommit, repo,
4112 		    &qid->id);
4113 		if (err)
4114 			return err;
4115 
4116 		tree_id1 = got_object_id_dup(
4117 		    got_object_commit_get_tree_id(pcommit));
4118 		if (tree_id1 == NULL) {
4119 			got_object_commit_close(pcommit);
4120 			return got_error_from_errno("got_object_id_dup");
4121 		}
4122 		got_object_commit_close(pcommit);
4123 
4124 	}
4125 
4126 	if (tree_id1) {
4127 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
4128 		if (err)
4129 			goto done;
4130 	}
4131 
4132 	tree_id2 = got_object_commit_get_tree_id(commit);
4133 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
4134 	if (err)
4135 		goto done;
4136 
4137 	err = got_diff_tree(tree1, tree2, NULL, NULL, -1, -1, "", "", repo,
4138 	    got_diff_tree_collect_changed_paths, paths, 0);
4139 done:
4140 	if (tree1)
4141 		got_object_tree_close(tree1);
4142 	if (tree2)
4143 		got_object_tree_close(tree2);
4144 	free(tree_id1);
4145 	return err;
4146 }
4147 
4148 static const struct got_error *
4149 add_line_metadata(struct got_diff_line **lines, size_t *nlines,
4150     off_t off, uint8_t type)
4151 {
4152 	struct got_diff_line *p;
4153 
4154 	p = reallocarray(*lines, *nlines + 1, sizeof(**lines));
4155 	if (p == NULL)
4156 		return got_error_from_errno("reallocarray");
4157 	*lines = p;
4158 	(*lines)[*nlines].offset = off;
4159 	(*lines)[*nlines].type = type;
4160 	(*nlines)++;
4161 
4162 	return NULL;
4163 }
4164 
4165 static const struct got_error *
4166 write_commit_info(struct got_diff_line **lines, size_t *nlines,
4167     struct got_object_id *commit_id, struct got_reflist_head *refs,
4168     struct got_repository *repo, FILE *outfile)
4169 {
4170 	const struct got_error *err = NULL;
4171 	char datebuf[26], *datestr;
4172 	struct got_commit_object *commit;
4173 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
4174 	time_t committer_time;
4175 	const char *author, *committer;
4176 	char *refs_str = NULL;
4177 	struct got_pathlist_head changed_paths;
4178 	struct got_pathlist_entry *pe;
4179 	off_t outoff = 0;
4180 	int n;
4181 
4182 	TAILQ_INIT(&changed_paths);
4183 
4184 	if (refs) {
4185 		err = build_refs_str(&refs_str, refs, commit_id, repo);
4186 		if (err)
4187 			return err;
4188 	}
4189 
4190 	err = got_object_open_as_commit(&commit, repo, commit_id);
4191 	if (err)
4192 		return err;
4193 
4194 	err = got_object_id_str(&id_str, commit_id);
4195 	if (err) {
4196 		err = got_error_from_errno("got_object_id_str");
4197 		goto done;
4198 	}
4199 
4200 	err = add_line_metadata(lines, nlines, 0, GOT_DIFF_LINE_NONE);
4201 	if (err)
4202 		goto done;
4203 
4204 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
4205 	    refs_str ? refs_str : "", refs_str ? ")" : "");
4206 	if (n < 0) {
4207 		err = got_error_from_errno("fprintf");
4208 		goto done;
4209 	}
4210 	outoff += n;
4211 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_META);
4212 	if (err)
4213 		goto done;
4214 
4215 	n = fprintf(outfile, "from: %s\n",
4216 	    got_object_commit_get_author(commit));
4217 	if (n < 0) {
4218 		err = got_error_from_errno("fprintf");
4219 		goto done;
4220 	}
4221 	outoff += n;
4222 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_AUTHOR);
4223 	if (err)
4224 		goto done;
4225 
4226 	committer_time = got_object_commit_get_committer_time(commit);
4227 	datestr = get_datestr(&committer_time, datebuf);
4228 	if (datestr) {
4229 		n = fprintf(outfile, "date: %s UTC\n", datestr);
4230 		if (n < 0) {
4231 			err = got_error_from_errno("fprintf");
4232 			goto done;
4233 		}
4234 		outoff += n;
4235 		err = add_line_metadata(lines, nlines, outoff,
4236 		    GOT_DIFF_LINE_DATE);
4237 		if (err)
4238 			goto done;
4239 	}
4240 	author = got_object_commit_get_author(commit);
4241 	committer = got_object_commit_get_committer(commit);
4242 	if (strcmp(author, committer) != 0) {
4243 		n = fprintf(outfile, "via: %s\n", committer);
4244 		if (n < 0) {
4245 			err = got_error_from_errno("fprintf");
4246 			goto done;
4247 		}
4248 		outoff += n;
4249 		err = add_line_metadata(lines, nlines, outoff,
4250 		    GOT_DIFF_LINE_AUTHOR);
4251 		if (err)
4252 			goto done;
4253 	}
4254 	if (got_object_commit_get_nparents(commit) > 1) {
4255 		const struct got_object_id_queue *parent_ids;
4256 		struct got_object_qid *qid;
4257 		int pn = 1;
4258 		parent_ids = got_object_commit_get_parent_ids(commit);
4259 		STAILQ_FOREACH(qid, parent_ids, entry) {
4260 			err = got_object_id_str(&id_str, &qid->id);
4261 			if (err)
4262 				goto done;
4263 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
4264 			if (n < 0) {
4265 				err = got_error_from_errno("fprintf");
4266 				goto done;
4267 			}
4268 			outoff += n;
4269 			err = add_line_metadata(lines, nlines, outoff,
4270 			    GOT_DIFF_LINE_META);
4271 			if (err)
4272 				goto done;
4273 			free(id_str);
4274 			id_str = NULL;
4275 		}
4276 	}
4277 
4278 	err = got_object_commit_get_logmsg(&logmsg, commit);
4279 	if (err)
4280 		goto done;
4281 	s = logmsg;
4282 	while ((line = strsep(&s, "\n")) != NULL) {
4283 		n = fprintf(outfile, "%s\n", line);
4284 		if (n < 0) {
4285 			err = got_error_from_errno("fprintf");
4286 			goto done;
4287 		}
4288 		outoff += n;
4289 		err = add_line_metadata(lines, nlines, outoff,
4290 		    GOT_DIFF_LINE_LOGMSG);
4291 		if (err)
4292 			goto done;
4293 	}
4294 
4295 	err = get_changed_paths(&changed_paths, commit, repo);
4296 	if (err)
4297 		goto done;
4298 	TAILQ_FOREACH(pe, &changed_paths, entry) {
4299 		struct got_diff_changed_path *cp = pe->data;
4300 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
4301 		if (n < 0) {
4302 			err = got_error_from_errno("fprintf");
4303 			goto done;
4304 		}
4305 		outoff += n;
4306 		err = add_line_metadata(lines, nlines, outoff,
4307 		    GOT_DIFF_LINE_CHANGES);
4308 		if (err)
4309 			goto done;
4310 		free((char *)pe->path);
4311 		free(pe->data);
4312 	}
4313 
4314 	fputc('\n', outfile);
4315 	outoff++;
4316 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
4317 done:
4318 	got_pathlist_free(&changed_paths);
4319 	free(id_str);
4320 	free(logmsg);
4321 	free(refs_str);
4322 	got_object_commit_close(commit);
4323 	if (err) {
4324 		free(*lines);
4325 		*lines = NULL;
4326 		*nlines = 0;
4327 	}
4328 	return err;
4329 }
4330 
4331 static const struct got_error *
4332 create_diff(struct tog_diff_view_state *s)
4333 {
4334 	const struct got_error *err = NULL;
4335 	FILE *f = NULL;
4336 	int obj_type;
4337 
4338 	free(s->lines);
4339 	s->lines = malloc(sizeof(*s->lines));
4340 	if (s->lines == NULL)
4341 		return got_error_from_errno("malloc");
4342 	s->nlines = 0;
4343 
4344 	f = got_opentemp();
4345 	if (f == NULL) {
4346 		err = got_error_from_errno("got_opentemp");
4347 		goto done;
4348 	}
4349 	if (s->f && fclose(s->f) == EOF) {
4350 		err = got_error_from_errno("fclose");
4351 		goto done;
4352 	}
4353 	s->f = f;
4354 
4355 	if (s->id1)
4356 		err = got_object_get_type(&obj_type, s->repo, s->id1);
4357 	else
4358 		err = got_object_get_type(&obj_type, s->repo, s->id2);
4359 	if (err)
4360 		goto done;
4361 
4362 	switch (obj_type) {
4363 	case GOT_OBJ_TYPE_BLOB:
4364 		err = got_diff_objects_as_blobs(&s->lines, &s->nlines,
4365 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
4366 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
4367 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
4368 		break;
4369 	case GOT_OBJ_TYPE_TREE:
4370 		err = got_diff_objects_as_trees(&s->lines, &s->nlines,
4371 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
4372 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4373 		    s->force_text_diff, s->repo, s->f);
4374 		break;
4375 	case GOT_OBJ_TYPE_COMMIT: {
4376 		const struct got_object_id_queue *parent_ids;
4377 		struct got_object_qid *pid;
4378 		struct got_commit_object *commit2;
4379 		struct got_reflist_head *refs;
4380 
4381 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
4382 		if (err)
4383 			goto done;
4384 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
4385 		/* Show commit info if we're diffing to a parent/root commit. */
4386 		if (s->id1 == NULL) {
4387 			err = write_commit_info(&s->lines, &s->nlines, s->id2,
4388 			    refs, s->repo, s->f);
4389 			if (err)
4390 				goto done;
4391 		} else {
4392 			parent_ids = got_object_commit_get_parent_ids(commit2);
4393 			STAILQ_FOREACH(pid, parent_ids, entry) {
4394 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
4395 					err = write_commit_info(&s->lines,
4396 					    &s->nlines, s->id2, refs, s->repo,
4397 					    s->f);
4398 					if (err)
4399 						goto done;
4400 					break;
4401 				}
4402 			}
4403 		}
4404 		got_object_commit_close(commit2);
4405 
4406 		err = got_diff_objects_as_commits(&s->lines, &s->nlines,
4407 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
4408 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4409 		    s->force_text_diff, s->repo, s->f);
4410 		break;
4411 	}
4412 	default:
4413 		err = got_error(GOT_ERR_OBJ_TYPE);
4414 		break;
4415 	}
4416 done:
4417 	if (s->f && fflush(s->f) != 0 && err == NULL)
4418 		err = got_error_from_errno("fflush");
4419 	return err;
4420 }
4421 
4422 static void
4423 diff_view_indicate_progress(struct tog_view *view)
4424 {
4425 	mvwaddstr(view->window, 0, 0, "diffing...");
4426 	update_panels();
4427 	doupdate();
4428 }
4429 
4430 static const struct got_error *
4431 search_start_diff_view(struct tog_view *view)
4432 {
4433 	struct tog_diff_view_state *s = &view->state.diff;
4434 
4435 	s->matched_line = 0;
4436 	return NULL;
4437 }
4438 
4439 static const struct got_error *
4440 search_next_diff_view(struct tog_view *view)
4441 {
4442 	struct tog_diff_view_state *s = &view->state.diff;
4443 	const struct got_error *err = NULL;
4444 	int lineno;
4445 	char *line = NULL;
4446 	size_t linesize = 0;
4447 	ssize_t linelen;
4448 
4449 	if (!view->searching) {
4450 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4451 		return NULL;
4452 	}
4453 
4454 	if (s->matched_line) {
4455 		if (view->searching == TOG_SEARCH_FORWARD)
4456 			lineno = s->matched_line + 1;
4457 		else
4458 			lineno = s->matched_line - 1;
4459 	} else
4460 		lineno = s->first_displayed_line;
4461 
4462 	while (1) {
4463 		off_t offset;
4464 
4465 		if (lineno <= 0 || lineno > s->nlines) {
4466 			if (s->matched_line == 0) {
4467 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4468 				break;
4469 			}
4470 
4471 			if (view->searching == TOG_SEARCH_FORWARD)
4472 				lineno = 1;
4473 			else
4474 				lineno = s->nlines;
4475 		}
4476 
4477 		offset = s->lines[lineno - 1].offset;
4478 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
4479 			free(line);
4480 			return got_error_from_errno("fseeko");
4481 		}
4482 		linelen = getline(&line, &linesize, s->f);
4483 		if (linelen != -1) {
4484 			char *exstr;
4485 			err = expand_tab(&exstr, line);
4486 			if (err)
4487 				break;
4488 			if (match_line(exstr, &view->regex, 1,
4489 			    &view->regmatch)) {
4490 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4491 				s->matched_line = lineno;
4492 				free(exstr);
4493 				break;
4494 			}
4495 			free(exstr);
4496 		}
4497 		if (view->searching == TOG_SEARCH_FORWARD)
4498 			lineno++;
4499 		else
4500 			lineno--;
4501 	}
4502 	free(line);
4503 
4504 	if (s->matched_line) {
4505 		s->first_displayed_line = s->matched_line;
4506 		s->selected_line = 1;
4507 	}
4508 
4509 	return err;
4510 }
4511 
4512 static const struct got_error *
4513 close_diff_view(struct tog_view *view)
4514 {
4515 	const struct got_error *err = NULL;
4516 	struct tog_diff_view_state *s = &view->state.diff;
4517 
4518 	free(s->id1);
4519 	s->id1 = NULL;
4520 	free(s->id2);
4521 	s->id2 = NULL;
4522 	if (s->f && fclose(s->f) == EOF)
4523 		err = got_error_from_errno("fclose");
4524 	s->f = NULL;
4525 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
4526 		err = got_error_from_errno("fclose");
4527 	s->f1 = NULL;
4528 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
4529 		err = got_error_from_errno("fclose");
4530 	s->f2 = NULL;
4531 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
4532 		err = got_error_from_errno("close");
4533 	s->fd1 = -1;
4534 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
4535 		err = got_error_from_errno("close");
4536 	s->fd2 = -1;
4537 	free(s->lines);
4538 	s->lines = NULL;
4539 	s->nlines = 0;
4540 	return err;
4541 }
4542 
4543 static const struct got_error *
4544 open_diff_view(struct tog_view *view, struct got_object_id *id1,
4545     struct got_object_id *id2, const char *label1, const char *label2,
4546     int diff_context, int ignore_whitespace, int force_text_diff,
4547     struct tog_view *parent_view, struct got_repository *repo)
4548 {
4549 	const struct got_error *err;
4550 	struct tog_diff_view_state *s = &view->state.diff;
4551 
4552 	memset(s, 0, sizeof(*s));
4553 	s->fd1 = -1;
4554 	s->fd2 = -1;
4555 
4556 	if (id1 != NULL && id2 != NULL) {
4557 	    int type1, type2;
4558 	    err = got_object_get_type(&type1, repo, id1);
4559 	    if (err)
4560 		return err;
4561 	    err = got_object_get_type(&type2, repo, id2);
4562 	    if (err)
4563 		return err;
4564 
4565 	    if (type1 != type2)
4566 		return got_error(GOT_ERR_OBJ_TYPE);
4567 	}
4568 	s->first_displayed_line = 1;
4569 	s->last_displayed_line = view->nlines;
4570 	s->selected_line = 1;
4571 	s->repo = repo;
4572 	s->id1 = id1;
4573 	s->id2 = id2;
4574 	s->label1 = label1;
4575 	s->label2 = label2;
4576 
4577 	if (id1) {
4578 		s->id1 = got_object_id_dup(id1);
4579 		if (s->id1 == NULL)
4580 			return got_error_from_errno("got_object_id_dup");
4581 	} else
4582 		s->id1 = NULL;
4583 
4584 	s->id2 = got_object_id_dup(id2);
4585 	if (s->id2 == NULL) {
4586 		err = got_error_from_errno("got_object_id_dup");
4587 		goto done;
4588 	}
4589 
4590 	s->f1 = got_opentemp();
4591 	if (s->f1 == NULL) {
4592 		err = got_error_from_errno("got_opentemp");
4593 		goto done;
4594 	}
4595 
4596 	s->f2 = got_opentemp();
4597 	if (s->f2 == NULL) {
4598 		err = got_error_from_errno("got_opentemp");
4599 		goto done;
4600 	}
4601 
4602 	s->fd1 = got_opentempfd();
4603 	if (s->fd1 == -1) {
4604 		err = got_error_from_errno("got_opentempfd");
4605 		goto done;
4606 	}
4607 
4608 	s->fd2 = got_opentempfd();
4609 	if (s->fd2 == -1) {
4610 		err = got_error_from_errno("got_opentempfd");
4611 		goto done;
4612 	}
4613 
4614 	s->first_displayed_line = 1;
4615 	s->last_displayed_line = view->nlines;
4616 	s->diff_context = diff_context;
4617 	s->ignore_whitespace = ignore_whitespace;
4618 	s->force_text_diff = force_text_diff;
4619 	s->parent_view = parent_view;
4620 	s->repo = repo;
4621 
4622 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4623 		int rc;
4624 
4625 		rc = init_pair(GOT_DIFF_LINE_MINUS,
4626 		    get_color_value("TOG_COLOR_DIFF_MINUS"), -1);
4627 		if (rc != ERR)
4628 			rc = init_pair(GOT_DIFF_LINE_PLUS,
4629 			    get_color_value("TOG_COLOR_DIFF_PLUS"), -1);
4630 		if (rc != ERR)
4631 			rc = init_pair(GOT_DIFF_LINE_HUNK,
4632 			    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"), -1);
4633 		if (rc != ERR)
4634 			rc = init_pair(GOT_DIFF_LINE_META,
4635 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4636 		if (rc != ERR)
4637 			rc = init_pair(GOT_DIFF_LINE_CHANGES,
4638 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4639 		if (rc != ERR)
4640 			rc = init_pair(GOT_DIFF_LINE_BLOB_MIN,
4641 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4642 		if (rc != ERR)
4643 			rc = init_pair(GOT_DIFF_LINE_BLOB_PLUS,
4644 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4645 		if (rc != ERR)
4646 			rc = init_pair(GOT_DIFF_LINE_AUTHOR,
4647 			    get_color_value("TOG_COLOR_AUTHOR"), -1);
4648 		if (rc != ERR)
4649 			rc = init_pair(GOT_DIFF_LINE_DATE,
4650 			    get_color_value("TOG_COLOR_DATE"), -1);
4651 		if (rc == ERR) {
4652 			err = got_error(GOT_ERR_RANGE);
4653 			goto done;
4654 		}
4655 	}
4656 
4657 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
4658 	    view_is_splitscreen(view))
4659 		show_log_view(parent_view); /* draw border */
4660 	diff_view_indicate_progress(view);
4661 
4662 	err = create_diff(s);
4663 
4664 	view->show = show_diff_view;
4665 	view->input = input_diff_view;
4666 	view->reset = reset_diff_view;
4667 	view->close = close_diff_view;
4668 	view->search_start = search_start_diff_view;
4669 	view->search_next = search_next_diff_view;
4670 done:
4671 	if (err)
4672 		close_diff_view(view);
4673 	return err;
4674 }
4675 
4676 static const struct got_error *
4677 show_diff_view(struct tog_view *view)
4678 {
4679 	const struct got_error *err;
4680 	struct tog_diff_view_state *s = &view->state.diff;
4681 	char *id_str1 = NULL, *id_str2, *header;
4682 	const char *label1, *label2;
4683 
4684 	if (s->id1) {
4685 		err = got_object_id_str(&id_str1, s->id1);
4686 		if (err)
4687 			return err;
4688 		label1 = s->label1 ? : id_str1;
4689 	} else
4690 		label1 = "/dev/null";
4691 
4692 	err = got_object_id_str(&id_str2, s->id2);
4693 	if (err)
4694 		return err;
4695 	label2 = s->label2 ? : id_str2;
4696 
4697 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4698 		err = got_error_from_errno("asprintf");
4699 		free(id_str1);
4700 		free(id_str2);
4701 		return err;
4702 	}
4703 	free(id_str1);
4704 	free(id_str2);
4705 
4706 	err = draw_file(view, header);
4707 	free(header);
4708 	return err;
4709 }
4710 
4711 static const struct got_error *
4712 set_selected_commit(struct tog_diff_view_state *s,
4713     struct commit_queue_entry *entry)
4714 {
4715 	const struct got_error *err;
4716 	const struct got_object_id_queue *parent_ids;
4717 	struct got_commit_object *selected_commit;
4718 	struct got_object_qid *pid;
4719 
4720 	free(s->id2);
4721 	s->id2 = got_object_id_dup(entry->id);
4722 	if (s->id2 == NULL)
4723 		return got_error_from_errno("got_object_id_dup");
4724 
4725 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4726 	if (err)
4727 		return err;
4728 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4729 	free(s->id1);
4730 	pid = STAILQ_FIRST(parent_ids);
4731 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4732 	got_object_commit_close(selected_commit);
4733 	return NULL;
4734 }
4735 
4736 static const struct got_error *
4737 reset_diff_view(struct tog_view *view)
4738 {
4739 	struct tog_diff_view_state *s = &view->state.diff;
4740 
4741 	view->count = 0;
4742 	wclear(view->window);
4743 	s->first_displayed_line = 1;
4744 	s->last_displayed_line = view->nlines;
4745 	s->matched_line = 0;
4746 	diff_view_indicate_progress(view);
4747 	return create_diff(s);
4748 }
4749 
4750 static void
4751 diff_prev_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4752 {
4753 	int start, i;
4754 
4755 	i = start = s->first_displayed_line - 1;
4756 
4757 	while (s->lines[i].type != type) {
4758 		if (i == 0)
4759 			i = s->nlines - 1;
4760 		if (--i == start)
4761 			return; /* do nothing, requested type not in file */
4762 	}
4763 
4764 	s->selected_line = 1;
4765 	s->first_displayed_line = i;
4766 }
4767 
4768 static void
4769 diff_next_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4770 {
4771 	int start, i;
4772 
4773 	i = start = s->first_displayed_line + 1;
4774 
4775 	while (s->lines[i].type != type) {
4776 		if (i == s->nlines - 1)
4777 			i = 0;
4778 		if (++i == start)
4779 			return; /* do nothing, requested type not in file */
4780 	}
4781 
4782 	s->selected_line = 1;
4783 	s->first_displayed_line = i;
4784 }
4785 
4786 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
4787     int, int, int);
4788 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
4789     int, int);
4790 
4791 static const struct got_error *
4792 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4793 {
4794 	const struct got_error *err = NULL;
4795 	struct tog_diff_view_state *s = &view->state.diff;
4796 	struct tog_log_view_state *ls;
4797 	struct commit_queue_entry *old_selected_entry;
4798 	char *line = NULL;
4799 	size_t linesize = 0;
4800 	ssize_t linelen;
4801 	int i, nscroll = view->nlines - 1, up = 0;
4802 
4803 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
4804 
4805 	switch (ch) {
4806 	case '0':
4807 		view->x = 0;
4808 		break;
4809 	case '$':
4810 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4811 		view->count = 0;
4812 		break;
4813 	case KEY_RIGHT:
4814 	case 'l':
4815 		if (view->x + view->ncols / 3 < view->maxx)
4816 			view->x += 2;  /* move two columns right */
4817 		else
4818 			view->count = 0;
4819 		break;
4820 	case KEY_LEFT:
4821 	case 'h':
4822 		view->x -= MIN(view->x, 2);  /* move two columns back */
4823 		if (view->x <= 0)
4824 			view->count = 0;
4825 		break;
4826 	case 'a':
4827 	case 'w':
4828 		if (ch == 'a')
4829 			s->force_text_diff = !s->force_text_diff;
4830 		if (ch == 'w')
4831 			s->ignore_whitespace = !s->ignore_whitespace;
4832 		err = reset_diff_view(view);
4833 		break;
4834 	case 'g':
4835 	case KEY_HOME:
4836 		s->first_displayed_line = 1;
4837 		view->count = 0;
4838 		break;
4839 	case 'G':
4840 	case KEY_END:
4841 		view->count = 0;
4842 		if (s->eof)
4843 			break;
4844 
4845 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4846 		s->eof = 1;
4847 		break;
4848 	case 'k':
4849 	case KEY_UP:
4850 	case CTRL('p'):
4851 		if (s->first_displayed_line > 1)
4852 			s->first_displayed_line--;
4853 		else
4854 			view->count = 0;
4855 		break;
4856 	case CTRL('u'):
4857 	case 'u':
4858 		nscroll /= 2;
4859 		/* FALL THROUGH */
4860 	case KEY_PPAGE:
4861 	case CTRL('b'):
4862 	case 'b':
4863 		if (s->first_displayed_line == 1) {
4864 			view->count = 0;
4865 			break;
4866 		}
4867 		i = 0;
4868 		while (i++ < nscroll && s->first_displayed_line > 1)
4869 			s->first_displayed_line--;
4870 		break;
4871 	case 'j':
4872 	case KEY_DOWN:
4873 	case CTRL('n'):
4874 		if (!s->eof)
4875 			s->first_displayed_line++;
4876 		else
4877 			view->count = 0;
4878 		break;
4879 	case CTRL('d'):
4880 	case 'd':
4881 		nscroll /= 2;
4882 		/* FALL THROUGH */
4883 	case KEY_NPAGE:
4884 	case CTRL('f'):
4885 	case 'f':
4886 	case ' ':
4887 		if (s->eof) {
4888 			view->count = 0;
4889 			break;
4890 		}
4891 		i = 0;
4892 		while (!s->eof && i++ < nscroll) {
4893 			linelen = getline(&line, &linesize, s->f);
4894 			s->first_displayed_line++;
4895 			if (linelen == -1) {
4896 				if (feof(s->f)) {
4897 					s->eof = 1;
4898 				} else
4899 					err = got_ferror(s->f, GOT_ERR_IO);
4900 				break;
4901 			}
4902 		}
4903 		free(line);
4904 		break;
4905 	case '(':
4906 		diff_prev_index(s, GOT_DIFF_LINE_BLOB_MIN);
4907 		break;
4908 	case ')':
4909 		diff_next_index(s, GOT_DIFF_LINE_BLOB_MIN);
4910 		break;
4911 	case '{':
4912 		diff_prev_index(s, GOT_DIFF_LINE_HUNK);
4913 		break;
4914 	case '}':
4915 		diff_next_index(s, GOT_DIFF_LINE_HUNK);
4916 		break;
4917 	case '[':
4918 		if (s->diff_context > 0) {
4919 			s->diff_context--;
4920 			s->matched_line = 0;
4921 			diff_view_indicate_progress(view);
4922 			err = create_diff(s);
4923 			if (s->first_displayed_line + view->nlines - 1 >
4924 			    s->nlines) {
4925 				s->first_displayed_line = 1;
4926 				s->last_displayed_line = view->nlines;
4927 			}
4928 		} else
4929 			view->count = 0;
4930 		break;
4931 	case ']':
4932 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4933 			s->diff_context++;
4934 			s->matched_line = 0;
4935 			diff_view_indicate_progress(view);
4936 			err = create_diff(s);
4937 		} else
4938 			view->count = 0;
4939 		break;
4940 	case '<':
4941 	case ',':
4942 	case 'K':
4943 		up = 1;
4944 		/* FALL THROUGH */
4945 	case '>':
4946 	case '.':
4947 	case 'J':
4948 		if (s->parent_view == NULL) {
4949 			view->count = 0;
4950 			break;
4951 		}
4952 		s->parent_view->count = view->count;
4953 
4954 		if (s->parent_view->type == TOG_VIEW_LOG) {
4955 			ls = &s->parent_view->state.log;
4956 			old_selected_entry = ls->selected_entry;
4957 
4958 			err = input_log_view(NULL, s->parent_view,
4959 			    up ? KEY_UP : KEY_DOWN);
4960 			if (err)
4961 				break;
4962 			view->count = s->parent_view->count;
4963 
4964 			if (old_selected_entry == ls->selected_entry)
4965 				break;
4966 
4967 			err = set_selected_commit(s, ls->selected_entry);
4968 			if (err)
4969 				break;
4970 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
4971 			struct tog_blame_view_state *bs;
4972 			struct got_object_id *id, *prev_id;
4973 
4974 			bs = &s->parent_view->state.blame;
4975 			prev_id = get_annotation_for_line(bs->blame.lines,
4976 			    bs->blame.nlines, bs->last_diffed_line);
4977 
4978 			err = input_blame_view(&view, s->parent_view,
4979 			    up ? KEY_UP : KEY_DOWN);
4980 			if (err)
4981 				break;
4982 			view->count = s->parent_view->count;
4983 
4984 			if (prev_id == NULL)
4985 				break;
4986 			id = get_selected_commit_id(bs->blame.lines,
4987 			    bs->blame.nlines, bs->first_displayed_line,
4988 			    bs->selected_line);
4989 			if (id == NULL)
4990 				break;
4991 
4992 			if (!got_object_id_cmp(prev_id, id))
4993 				break;
4994 
4995 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
4996 			if (err)
4997 				break;
4998 		}
4999 		s->first_displayed_line = 1;
5000 		s->last_displayed_line = view->nlines;
5001 		s->matched_line = 0;
5002 		view->x = 0;
5003 
5004 		diff_view_indicate_progress(view);
5005 		err = create_diff(s);
5006 		break;
5007 	default:
5008 		view->count = 0;
5009 		break;
5010 	}
5011 
5012 	return err;
5013 }
5014 
5015 static const struct got_error *
5016 cmd_diff(int argc, char *argv[])
5017 {
5018 	const struct got_error *error = NULL;
5019 	struct got_repository *repo = NULL;
5020 	struct got_worktree *worktree = NULL;
5021 	struct got_object_id *id1 = NULL, *id2 = NULL;
5022 	char *repo_path = NULL, *cwd = NULL;
5023 	char *id_str1 = NULL, *id_str2 = NULL;
5024 	char *label1 = NULL, *label2 = NULL;
5025 	int diff_context = 3, ignore_whitespace = 0;
5026 	int ch, force_text_diff = 0;
5027 	const char *errstr;
5028 	struct tog_view *view;
5029 	int *pack_fds = NULL;
5030 
5031 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
5032 		switch (ch) {
5033 		case 'a':
5034 			force_text_diff = 1;
5035 			break;
5036 		case 'C':
5037 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
5038 			    &errstr);
5039 			if (errstr != NULL)
5040 				errx(1, "number of context lines is %s: %s",
5041 				    errstr, errstr);
5042 			break;
5043 		case 'r':
5044 			repo_path = realpath(optarg, NULL);
5045 			if (repo_path == NULL)
5046 				return got_error_from_errno2("realpath",
5047 				    optarg);
5048 			got_path_strip_trailing_slashes(repo_path);
5049 			break;
5050 		case 'w':
5051 			ignore_whitespace = 1;
5052 			break;
5053 		default:
5054 			usage_diff();
5055 			/* NOTREACHED */
5056 		}
5057 	}
5058 
5059 	argc -= optind;
5060 	argv += optind;
5061 
5062 	if (argc == 0) {
5063 		usage_diff(); /* TODO show local worktree changes */
5064 	} else if (argc == 2) {
5065 		id_str1 = argv[0];
5066 		id_str2 = argv[1];
5067 	} else
5068 		usage_diff();
5069 
5070 	error = got_repo_pack_fds_open(&pack_fds);
5071 	if (error)
5072 		goto done;
5073 
5074 	if (repo_path == NULL) {
5075 		cwd = getcwd(NULL, 0);
5076 		if (cwd == NULL)
5077 			return got_error_from_errno("getcwd");
5078 		error = got_worktree_open(&worktree, cwd);
5079 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5080 			goto done;
5081 		if (worktree)
5082 			repo_path =
5083 			    strdup(got_worktree_get_repo_path(worktree));
5084 		else
5085 			repo_path = strdup(cwd);
5086 		if (repo_path == NULL) {
5087 			error = got_error_from_errno("strdup");
5088 			goto done;
5089 		}
5090 	}
5091 
5092 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5093 	if (error)
5094 		goto done;
5095 
5096 	init_curses();
5097 
5098 	error = apply_unveil(got_repo_get_path(repo), NULL);
5099 	if (error)
5100 		goto done;
5101 
5102 	error = tog_load_refs(repo, 0);
5103 	if (error)
5104 		goto done;
5105 
5106 	error = got_repo_match_object_id(&id1, &label1, id_str1,
5107 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5108 	if (error)
5109 		goto done;
5110 
5111 	error = got_repo_match_object_id(&id2, &label2, id_str2,
5112 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5113 	if (error)
5114 		goto done;
5115 
5116 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
5117 	if (view == NULL) {
5118 		error = got_error_from_errno("view_open");
5119 		goto done;
5120 	}
5121 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
5122 	    ignore_whitespace, force_text_diff, NULL,  repo);
5123 	if (error)
5124 		goto done;
5125 	error = view_loop(view);
5126 done:
5127 	free(label1);
5128 	free(label2);
5129 	free(repo_path);
5130 	free(cwd);
5131 	if (repo) {
5132 		const struct got_error *close_err = got_repo_close(repo);
5133 		if (error == NULL)
5134 			error = close_err;
5135 	}
5136 	if (worktree)
5137 		got_worktree_close(worktree);
5138 	if (pack_fds) {
5139 		const struct got_error *pack_err =
5140 		    got_repo_pack_fds_close(pack_fds);
5141 		if (error == NULL)
5142 			error = pack_err;
5143 	}
5144 	tog_free_refs();
5145 	return error;
5146 }
5147 
5148 __dead static void
5149 usage_blame(void)
5150 {
5151 	endwin();
5152 	fprintf(stderr,
5153 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
5154 	    getprogname());
5155 	exit(1);
5156 }
5157 
5158 struct tog_blame_line {
5159 	int annotated;
5160 	struct got_object_id *id;
5161 };
5162 
5163 static const struct got_error *
5164 draw_blame(struct tog_view *view)
5165 {
5166 	struct tog_blame_view_state *s = &view->state.blame;
5167 	struct tog_blame *blame = &s->blame;
5168 	regmatch_t *regmatch = &view->regmatch;
5169 	const struct got_error *err;
5170 	int lineno = 0, nprinted = 0;
5171 	char *line = NULL;
5172 	size_t linesize = 0;
5173 	ssize_t linelen;
5174 	wchar_t *wline;
5175 	int width;
5176 	struct tog_blame_line *blame_line;
5177 	struct got_object_id *prev_id = NULL;
5178 	char *id_str;
5179 	struct tog_color *tc;
5180 
5181 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
5182 	if (err)
5183 		return err;
5184 
5185 	rewind(blame->f);
5186 	werase(view->window);
5187 
5188 	if (asprintf(&line, "commit %s", id_str) == -1) {
5189 		err = got_error_from_errno("asprintf");
5190 		free(id_str);
5191 		return err;
5192 	}
5193 
5194 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5195 	free(line);
5196 	line = NULL;
5197 	if (err)
5198 		return err;
5199 	if (view_needs_focus_indication(view))
5200 		wstandout(view->window);
5201 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5202 	if (tc)
5203 		wattr_on(view->window,
5204 		    COLOR_PAIR(tc->colorpair), NULL);
5205 	waddwstr(view->window, wline);
5206 	if (tc)
5207 		wattr_off(view->window,
5208 		    COLOR_PAIR(tc->colorpair), NULL);
5209 	if (view_needs_focus_indication(view))
5210 		wstandend(view->window);
5211 	free(wline);
5212 	wline = NULL;
5213 	if (width < view->ncols - 1)
5214 		waddch(view->window, '\n');
5215 
5216 	if (view->gline > blame->nlines)
5217 		view->gline = blame->nlines;
5218 
5219 	if (asprintf(&line, "[%d/%d] %s%s", view->gline ? view->gline :
5220 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
5221 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
5222 		free(id_str);
5223 		return got_error_from_errno("asprintf");
5224 	}
5225 	free(id_str);
5226 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5227 	free(line);
5228 	line = NULL;
5229 	if (err)
5230 		return err;
5231 	waddwstr(view->window, wline);
5232 	free(wline);
5233 	wline = NULL;
5234 	if (width < view->ncols - 1)
5235 		waddch(view->window, '\n');
5236 
5237 	s->eof = 0;
5238 	view->maxx = 0;
5239 	while (nprinted < view->nlines - 2) {
5240 		linelen = getline(&line, &linesize, blame->f);
5241 		if (linelen == -1) {
5242 			if (feof(blame->f)) {
5243 				s->eof = 1;
5244 				break;
5245 			}
5246 			free(line);
5247 			return got_ferror(blame->f, GOT_ERR_IO);
5248 		}
5249 		if (++lineno < s->first_displayed_line)
5250 			continue;
5251 		if (view->gline && !gotoline(view, &lineno, &nprinted))
5252 			continue;
5253 
5254 		/* Set view->maxx based on full line length. */
5255 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
5256 		if (err) {
5257 			free(line);
5258 			return err;
5259 		}
5260 		free(wline);
5261 		wline = NULL;
5262 		view->maxx = MAX(view->maxx, width);
5263 
5264 		if (nprinted == s->selected_line - 1)
5265 			wstandout(view->window);
5266 
5267 		if (blame->nlines > 0) {
5268 			blame_line = &blame->lines[lineno - 1];
5269 			if (blame_line->annotated && prev_id &&
5270 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
5271 			    !(nprinted == s->selected_line - 1)) {
5272 				waddstr(view->window, "        ");
5273 			} else if (blame_line->annotated) {
5274 				char *id_str;
5275 				err = got_object_id_str(&id_str,
5276 				    blame_line->id);
5277 				if (err) {
5278 					free(line);
5279 					return err;
5280 				}
5281 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5282 				if (tc)
5283 					wattr_on(view->window,
5284 					    COLOR_PAIR(tc->colorpair), NULL);
5285 				wprintw(view->window, "%.8s", id_str);
5286 				if (tc)
5287 					wattr_off(view->window,
5288 					    COLOR_PAIR(tc->colorpair), NULL);
5289 				free(id_str);
5290 				prev_id = blame_line->id;
5291 			} else {
5292 				waddstr(view->window, "........");
5293 				prev_id = NULL;
5294 			}
5295 		} else {
5296 			waddstr(view->window, "........");
5297 			prev_id = NULL;
5298 		}
5299 
5300 		if (nprinted == s->selected_line - 1)
5301 			wstandend(view->window);
5302 		waddstr(view->window, " ");
5303 
5304 		if (view->ncols <= 9) {
5305 			width = 9;
5306 		} else if (s->first_displayed_line + nprinted ==
5307 		    s->matched_line &&
5308 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
5309 			err = add_matched_line(&width, line, view->ncols - 9, 9,
5310 			    view->window, view->x, regmatch);
5311 			if (err) {
5312 				free(line);
5313 				return err;
5314 			}
5315 			width += 9;
5316 		} else {
5317 			int skip;
5318 			err = format_line(&wline, &width, &skip, line,
5319 			    view->x, view->ncols - 9, 9, 1);
5320 			if (err) {
5321 				free(line);
5322 				return err;
5323 			}
5324 			waddwstr(view->window, &wline[skip]);
5325 			width += 9;
5326 			free(wline);
5327 			wline = NULL;
5328 		}
5329 
5330 		if (width <= view->ncols - 1)
5331 			waddch(view->window, '\n');
5332 		if (++nprinted == 1)
5333 			s->first_displayed_line = lineno;
5334 	}
5335 	free(line);
5336 	s->last_displayed_line = lineno;
5337 
5338 	view_border(view);
5339 
5340 	return NULL;
5341 }
5342 
5343 static const struct got_error *
5344 blame_cb(void *arg, int nlines, int lineno,
5345     struct got_commit_object *commit, struct got_object_id *id)
5346 {
5347 	const struct got_error *err = NULL;
5348 	struct tog_blame_cb_args *a = arg;
5349 	struct tog_blame_line *line;
5350 	int errcode;
5351 
5352 	if (nlines != a->nlines ||
5353 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
5354 		return got_error(GOT_ERR_RANGE);
5355 
5356 	errcode = pthread_mutex_lock(&tog_mutex);
5357 	if (errcode)
5358 		return got_error_set_errno(errcode, "pthread_mutex_lock");
5359 
5360 	if (*a->quit) {	/* user has quit the blame view */
5361 		err = got_error(GOT_ERR_ITER_COMPLETED);
5362 		goto done;
5363 	}
5364 
5365 	if (lineno == -1)
5366 		goto done; /* no change in this commit */
5367 
5368 	line = &a->lines[lineno - 1];
5369 	if (line->annotated)
5370 		goto done;
5371 
5372 	line->id = got_object_id_dup(id);
5373 	if (line->id == NULL) {
5374 		err = got_error_from_errno("got_object_id_dup");
5375 		goto done;
5376 	}
5377 	line->annotated = 1;
5378 done:
5379 	errcode = pthread_mutex_unlock(&tog_mutex);
5380 	if (errcode)
5381 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5382 	return err;
5383 }
5384 
5385 static void *
5386 blame_thread(void *arg)
5387 {
5388 	const struct got_error *err, *close_err;
5389 	struct tog_blame_thread_args *ta = arg;
5390 	struct tog_blame_cb_args *a = ta->cb_args;
5391 	int errcode, fd1 = -1, fd2 = -1;
5392 	FILE *f1 = NULL, *f2 = NULL;
5393 
5394 	fd1 = got_opentempfd();
5395 	if (fd1 == -1)
5396 		return (void *)got_error_from_errno("got_opentempfd");
5397 
5398 	fd2 = got_opentempfd();
5399 	if (fd2 == -1) {
5400 		err = got_error_from_errno("got_opentempfd");
5401 		goto done;
5402 	}
5403 
5404 	f1 = got_opentemp();
5405 	if (f1 == NULL) {
5406 		err = (void *)got_error_from_errno("got_opentemp");
5407 		goto done;
5408 	}
5409 	f2 = got_opentemp();
5410 	if (f2 == NULL) {
5411 		err = (void *)got_error_from_errno("got_opentemp");
5412 		goto done;
5413 	}
5414 
5415 	err = block_signals_used_by_main_thread();
5416 	if (err)
5417 		goto done;
5418 
5419 	err = got_blame(ta->path, a->commit_id, ta->repo,
5420 	    tog_diff_algo, blame_cb, ta->cb_args,
5421 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
5422 	if (err && err->code == GOT_ERR_CANCELLED)
5423 		err = NULL;
5424 
5425 	errcode = pthread_mutex_lock(&tog_mutex);
5426 	if (errcode) {
5427 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
5428 		goto done;
5429 	}
5430 
5431 	close_err = got_repo_close(ta->repo);
5432 	if (err == NULL)
5433 		err = close_err;
5434 	ta->repo = NULL;
5435 	*ta->complete = 1;
5436 
5437 	errcode = pthread_mutex_unlock(&tog_mutex);
5438 	if (errcode && err == NULL)
5439 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5440 
5441 done:
5442 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
5443 		err = got_error_from_errno("close");
5444 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
5445 		err = got_error_from_errno("close");
5446 	if (f1 && fclose(f1) == EOF && err == NULL)
5447 		err = got_error_from_errno("fclose");
5448 	if (f2 && fclose(f2) == EOF && err == NULL)
5449 		err = got_error_from_errno("fclose");
5450 
5451 	return (void *)err;
5452 }
5453 
5454 static struct got_object_id *
5455 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
5456     int first_displayed_line, int selected_line)
5457 {
5458 	struct tog_blame_line *line;
5459 
5460 	if (nlines <= 0)
5461 		return NULL;
5462 
5463 	line = &lines[first_displayed_line - 1 + selected_line - 1];
5464 	if (!line->annotated)
5465 		return NULL;
5466 
5467 	return line->id;
5468 }
5469 
5470 static struct got_object_id *
5471 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
5472     int lineno)
5473 {
5474 	struct tog_blame_line *line;
5475 
5476 	if (nlines <= 0 || lineno >= nlines)
5477 		return NULL;
5478 
5479 	line = &lines[lineno - 1];
5480 	if (!line->annotated)
5481 		return NULL;
5482 
5483 	return line->id;
5484 }
5485 
5486 static const struct got_error *
5487 stop_blame(struct tog_blame *blame)
5488 {
5489 	const struct got_error *err = NULL;
5490 	int i;
5491 
5492 	if (blame->thread) {
5493 		int errcode;
5494 		errcode = pthread_mutex_unlock(&tog_mutex);
5495 		if (errcode)
5496 			return got_error_set_errno(errcode,
5497 			    "pthread_mutex_unlock");
5498 		errcode = pthread_join(blame->thread, (void **)&err);
5499 		if (errcode)
5500 			return got_error_set_errno(errcode, "pthread_join");
5501 		errcode = pthread_mutex_lock(&tog_mutex);
5502 		if (errcode)
5503 			return got_error_set_errno(errcode,
5504 			    "pthread_mutex_lock");
5505 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
5506 			err = NULL;
5507 		blame->thread = NULL;
5508 	}
5509 	if (blame->thread_args.repo) {
5510 		const struct got_error *close_err;
5511 		close_err = got_repo_close(blame->thread_args.repo);
5512 		if (err == NULL)
5513 			err = close_err;
5514 		blame->thread_args.repo = NULL;
5515 	}
5516 	if (blame->f) {
5517 		if (fclose(blame->f) == EOF && err == NULL)
5518 			err = got_error_from_errno("fclose");
5519 		blame->f = NULL;
5520 	}
5521 	if (blame->lines) {
5522 		for (i = 0; i < blame->nlines; i++)
5523 			free(blame->lines[i].id);
5524 		free(blame->lines);
5525 		blame->lines = NULL;
5526 	}
5527 	free(blame->cb_args.commit_id);
5528 	blame->cb_args.commit_id = NULL;
5529 	if (blame->pack_fds) {
5530 		const struct got_error *pack_err =
5531 		    got_repo_pack_fds_close(blame->pack_fds);
5532 		if (err == NULL)
5533 			err = pack_err;
5534 		blame->pack_fds = NULL;
5535 	}
5536 	return err;
5537 }
5538 
5539 static const struct got_error *
5540 cancel_blame_view(void *arg)
5541 {
5542 	const struct got_error *err = NULL;
5543 	int *done = arg;
5544 	int errcode;
5545 
5546 	errcode = pthread_mutex_lock(&tog_mutex);
5547 	if (errcode)
5548 		return got_error_set_errno(errcode,
5549 		    "pthread_mutex_unlock");
5550 
5551 	if (*done)
5552 		err = got_error(GOT_ERR_CANCELLED);
5553 
5554 	errcode = pthread_mutex_unlock(&tog_mutex);
5555 	if (errcode)
5556 		return got_error_set_errno(errcode,
5557 		    "pthread_mutex_lock");
5558 
5559 	return err;
5560 }
5561 
5562 static const struct got_error *
5563 run_blame(struct tog_view *view)
5564 {
5565 	struct tog_blame_view_state *s = &view->state.blame;
5566 	struct tog_blame *blame = &s->blame;
5567 	const struct got_error *err = NULL;
5568 	struct got_commit_object *commit = NULL;
5569 	struct got_blob_object *blob = NULL;
5570 	struct got_repository *thread_repo = NULL;
5571 	struct got_object_id *obj_id = NULL;
5572 	int obj_type, fd = -1;
5573 	int *pack_fds = NULL;
5574 
5575 	err = got_object_open_as_commit(&commit, s->repo,
5576 	    &s->blamed_commit->id);
5577 	if (err)
5578 		return err;
5579 
5580 	fd = got_opentempfd();
5581 	if (fd == -1) {
5582 		err = got_error_from_errno("got_opentempfd");
5583 		goto done;
5584 	}
5585 
5586 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
5587 	if (err)
5588 		goto done;
5589 
5590 	err = got_object_get_type(&obj_type, s->repo, obj_id);
5591 	if (err)
5592 		goto done;
5593 
5594 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
5595 		err = got_error(GOT_ERR_OBJ_TYPE);
5596 		goto done;
5597 	}
5598 
5599 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
5600 	if (err)
5601 		goto done;
5602 	blame->f = got_opentemp();
5603 	if (blame->f == NULL) {
5604 		err = got_error_from_errno("got_opentemp");
5605 		goto done;
5606 	}
5607 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
5608 	    &blame->line_offsets, blame->f, blob);
5609 	if (err)
5610 		goto done;
5611 	if (blame->nlines == 0) {
5612 		s->blame_complete = 1;
5613 		goto done;
5614 	}
5615 
5616 	/* Don't include \n at EOF in the blame line count. */
5617 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
5618 		blame->nlines--;
5619 
5620 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
5621 	if (blame->lines == NULL) {
5622 		err = got_error_from_errno("calloc");
5623 		goto done;
5624 	}
5625 
5626 	err = got_repo_pack_fds_open(&pack_fds);
5627 	if (err)
5628 		goto done;
5629 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
5630 	    pack_fds);
5631 	if (err)
5632 		goto done;
5633 
5634 	blame->pack_fds = pack_fds;
5635 	blame->cb_args.view = view;
5636 	blame->cb_args.lines = blame->lines;
5637 	blame->cb_args.nlines = blame->nlines;
5638 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
5639 	if (blame->cb_args.commit_id == NULL) {
5640 		err = got_error_from_errno("got_object_id_dup");
5641 		goto done;
5642 	}
5643 	blame->cb_args.quit = &s->done;
5644 
5645 	blame->thread_args.path = s->path;
5646 	blame->thread_args.repo = thread_repo;
5647 	blame->thread_args.cb_args = &blame->cb_args;
5648 	blame->thread_args.complete = &s->blame_complete;
5649 	blame->thread_args.cancel_cb = cancel_blame_view;
5650 	blame->thread_args.cancel_arg = &s->done;
5651 	s->blame_complete = 0;
5652 
5653 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
5654 		s->first_displayed_line = 1;
5655 		s->last_displayed_line = view->nlines;
5656 		s->selected_line = 1;
5657 	}
5658 	s->matched_line = 0;
5659 
5660 done:
5661 	if (commit)
5662 		got_object_commit_close(commit);
5663 	if (fd != -1 && close(fd) == -1 && err == NULL)
5664 		err = got_error_from_errno("close");
5665 	if (blob)
5666 		got_object_blob_close(blob);
5667 	free(obj_id);
5668 	if (err)
5669 		stop_blame(blame);
5670 	return err;
5671 }
5672 
5673 static const struct got_error *
5674 open_blame_view(struct tog_view *view, char *path,
5675     struct got_object_id *commit_id, struct got_repository *repo)
5676 {
5677 	const struct got_error *err = NULL;
5678 	struct tog_blame_view_state *s = &view->state.blame;
5679 
5680 	STAILQ_INIT(&s->blamed_commits);
5681 
5682 	s->path = strdup(path);
5683 	if (s->path == NULL)
5684 		return got_error_from_errno("strdup");
5685 
5686 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
5687 	if (err) {
5688 		free(s->path);
5689 		return err;
5690 	}
5691 
5692 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
5693 	s->first_displayed_line = 1;
5694 	s->last_displayed_line = view->nlines;
5695 	s->selected_line = 1;
5696 	s->blame_complete = 0;
5697 	s->repo = repo;
5698 	s->commit_id = commit_id;
5699 	memset(&s->blame, 0, sizeof(s->blame));
5700 
5701 	STAILQ_INIT(&s->colors);
5702 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5703 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
5704 		    get_color_value("TOG_COLOR_COMMIT"));
5705 		if (err)
5706 			return err;
5707 	}
5708 
5709 	view->show = show_blame_view;
5710 	view->input = input_blame_view;
5711 	view->reset = reset_blame_view;
5712 	view->close = close_blame_view;
5713 	view->search_start = search_start_blame_view;
5714 	view->search_next = search_next_blame_view;
5715 
5716 	return run_blame(view);
5717 }
5718 
5719 static const struct got_error *
5720 close_blame_view(struct tog_view *view)
5721 {
5722 	const struct got_error *err = NULL;
5723 	struct tog_blame_view_state *s = &view->state.blame;
5724 
5725 	if (s->blame.thread)
5726 		err = stop_blame(&s->blame);
5727 
5728 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
5729 		struct got_object_qid *blamed_commit;
5730 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
5731 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5732 		got_object_qid_free(blamed_commit);
5733 	}
5734 
5735 	free(s->path);
5736 	free_colors(&s->colors);
5737 	return err;
5738 }
5739 
5740 static const struct got_error *
5741 search_start_blame_view(struct tog_view *view)
5742 {
5743 	struct tog_blame_view_state *s = &view->state.blame;
5744 
5745 	s->matched_line = 0;
5746 	return NULL;
5747 }
5748 
5749 static const struct got_error *
5750 search_next_blame_view(struct tog_view *view)
5751 {
5752 	struct tog_blame_view_state *s = &view->state.blame;
5753 	const struct got_error *err = NULL;
5754 	int lineno;
5755 	char *line = NULL;
5756 	size_t linesize = 0;
5757 	ssize_t linelen;
5758 
5759 	if (!view->searching) {
5760 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5761 		return NULL;
5762 	}
5763 
5764 	if (s->matched_line) {
5765 		if (view->searching == TOG_SEARCH_FORWARD)
5766 			lineno = s->matched_line + 1;
5767 		else
5768 			lineno = s->matched_line - 1;
5769 	} else
5770 		lineno = s->first_displayed_line - 1 + s->selected_line;
5771 
5772 	while (1) {
5773 		off_t offset;
5774 
5775 		if (lineno <= 0 || lineno > s->blame.nlines) {
5776 			if (s->matched_line == 0) {
5777 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5778 				break;
5779 			}
5780 
5781 			if (view->searching == TOG_SEARCH_FORWARD)
5782 				lineno = 1;
5783 			else
5784 				lineno = s->blame.nlines;
5785 		}
5786 
5787 		offset = s->blame.line_offsets[lineno - 1];
5788 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5789 			free(line);
5790 			return got_error_from_errno("fseeko");
5791 		}
5792 		linelen = getline(&line, &linesize, s->blame.f);
5793 		if (linelen != -1) {
5794 			char *exstr;
5795 			err = expand_tab(&exstr, line);
5796 			if (err)
5797 				break;
5798 			if (match_line(exstr, &view->regex, 1,
5799 			    &view->regmatch)) {
5800 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5801 				s->matched_line = lineno;
5802 				free(exstr);
5803 				break;
5804 			}
5805 			free(exstr);
5806 		}
5807 		if (view->searching == TOG_SEARCH_FORWARD)
5808 			lineno++;
5809 		else
5810 			lineno--;
5811 	}
5812 	free(line);
5813 
5814 	if (s->matched_line) {
5815 		s->first_displayed_line = s->matched_line;
5816 		s->selected_line = 1;
5817 	}
5818 
5819 	return err;
5820 }
5821 
5822 static const struct got_error *
5823 show_blame_view(struct tog_view *view)
5824 {
5825 	const struct got_error *err = NULL;
5826 	struct tog_blame_view_state *s = &view->state.blame;
5827 	int errcode;
5828 
5829 	if (s->blame.thread == NULL && !s->blame_complete) {
5830 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5831 		    &s->blame.thread_args);
5832 		if (errcode)
5833 			return got_error_set_errno(errcode, "pthread_create");
5834 
5835 		halfdelay(1); /* fast refresh while annotating  */
5836 	}
5837 
5838 	if (s->blame_complete)
5839 		halfdelay(10); /* disable fast refresh */
5840 
5841 	err = draw_blame(view);
5842 
5843 	view_border(view);
5844 	return err;
5845 }
5846 
5847 static const struct got_error *
5848 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
5849     struct got_repository *repo, struct got_object_id *id)
5850 {
5851 	struct tog_view		*log_view;
5852 	const struct got_error	*err = NULL;
5853 
5854 	*new_view = NULL;
5855 
5856 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
5857 	if (log_view == NULL)
5858 		return got_error_from_errno("view_open");
5859 
5860 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0);
5861 	if (err)
5862 		view_close(log_view);
5863 	else
5864 		*new_view = log_view;
5865 
5866 	return err;
5867 }
5868 
5869 static const struct got_error *
5870 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5871 {
5872 	const struct got_error *err = NULL, *thread_err = NULL;
5873 	struct tog_view *diff_view;
5874 	struct tog_blame_view_state *s = &view->state.blame;
5875 	int eos, nscroll, begin_y = 0, begin_x = 0;
5876 
5877 	eos = nscroll = view->nlines - 2;
5878 	if (view_is_hsplit_top(view))
5879 		--eos;  /* border */
5880 
5881 	switch (ch) {
5882 	case '0':
5883 		view->x = 0;
5884 		break;
5885 	case '$':
5886 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5887 		view->count = 0;
5888 		break;
5889 	case KEY_RIGHT:
5890 	case 'l':
5891 		if (view->x + view->ncols / 3 < view->maxx)
5892 			view->x += 2;  /* move two columns right */
5893 		else
5894 			view->count = 0;
5895 		break;
5896 	case KEY_LEFT:
5897 	case 'h':
5898 		view->x -= MIN(view->x, 2);  /* move two columns back */
5899 		if (view->x <= 0)
5900 			view->count = 0;
5901 		break;
5902 	case 'q':
5903 		s->done = 1;
5904 		break;
5905 	case 'g':
5906 	case KEY_HOME:
5907 		s->selected_line = 1;
5908 		s->first_displayed_line = 1;
5909 		view->count = 0;
5910 		break;
5911 	case 'G':
5912 	case KEY_END:
5913 		if (s->blame.nlines < eos) {
5914 			s->selected_line = s->blame.nlines;
5915 			s->first_displayed_line = 1;
5916 		} else {
5917 			s->selected_line = eos;
5918 			s->first_displayed_line = s->blame.nlines - (eos - 1);
5919 		}
5920 		view->count = 0;
5921 		break;
5922 	case 'k':
5923 	case KEY_UP:
5924 	case CTRL('p'):
5925 		if (s->selected_line > 1)
5926 			s->selected_line--;
5927 		else if (s->selected_line == 1 &&
5928 		    s->first_displayed_line > 1)
5929 			s->first_displayed_line--;
5930 		else
5931 			view->count = 0;
5932 		break;
5933 	case CTRL('u'):
5934 	case 'u':
5935 		nscroll /= 2;
5936 		/* FALL THROUGH */
5937 	case KEY_PPAGE:
5938 	case CTRL('b'):
5939 	case 'b':
5940 		if (s->first_displayed_line == 1) {
5941 			if (view->count > 1)
5942 				nscroll += nscroll;
5943 			s->selected_line = MAX(1, s->selected_line - nscroll);
5944 			view->count = 0;
5945 			break;
5946 		}
5947 		if (s->first_displayed_line > nscroll)
5948 			s->first_displayed_line -= nscroll;
5949 		else
5950 			s->first_displayed_line = 1;
5951 		break;
5952 	case 'j':
5953 	case KEY_DOWN:
5954 	case CTRL('n'):
5955 		if (s->selected_line < eos && s->first_displayed_line +
5956 		    s->selected_line <= s->blame.nlines)
5957 			s->selected_line++;
5958 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
5959 			s->first_displayed_line++;
5960 		else
5961 			view->count = 0;
5962 		break;
5963 	case 'c':
5964 	case 'p': {
5965 		struct got_object_id *id = NULL;
5966 
5967 		view->count = 0;
5968 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5969 		    s->first_displayed_line, s->selected_line);
5970 		if (id == NULL)
5971 			break;
5972 		if (ch == 'p') {
5973 			struct got_commit_object *commit, *pcommit;
5974 			struct got_object_qid *pid;
5975 			struct got_object_id *blob_id = NULL;
5976 			int obj_type;
5977 			err = got_object_open_as_commit(&commit,
5978 			    s->repo, id);
5979 			if (err)
5980 				break;
5981 			pid = STAILQ_FIRST(
5982 			    got_object_commit_get_parent_ids(commit));
5983 			if (pid == NULL) {
5984 				got_object_commit_close(commit);
5985 				break;
5986 			}
5987 			/* Check if path history ends here. */
5988 			err = got_object_open_as_commit(&pcommit,
5989 			    s->repo, &pid->id);
5990 			if (err)
5991 				break;
5992 			err = got_object_id_by_path(&blob_id, s->repo,
5993 			    pcommit, s->path);
5994 			got_object_commit_close(pcommit);
5995 			if (err) {
5996 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5997 					err = NULL;
5998 				got_object_commit_close(commit);
5999 				break;
6000 			}
6001 			err = got_object_get_type(&obj_type, s->repo,
6002 			    blob_id);
6003 			free(blob_id);
6004 			/* Can't blame non-blob type objects. */
6005 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
6006 				got_object_commit_close(commit);
6007 				break;
6008 			}
6009 			err = got_object_qid_alloc(&s->blamed_commit,
6010 			    &pid->id);
6011 			got_object_commit_close(commit);
6012 		} else {
6013 			if (got_object_id_cmp(id,
6014 			    &s->blamed_commit->id) == 0)
6015 				break;
6016 			err = got_object_qid_alloc(&s->blamed_commit,
6017 			    id);
6018 		}
6019 		if (err)
6020 			break;
6021 		s->done = 1;
6022 		thread_err = stop_blame(&s->blame);
6023 		s->done = 0;
6024 		if (thread_err)
6025 			break;
6026 		STAILQ_INSERT_HEAD(&s->blamed_commits,
6027 		    s->blamed_commit, entry);
6028 		err = run_blame(view);
6029 		if (err)
6030 			break;
6031 		break;
6032 	}
6033 	case 'C': {
6034 		struct got_object_qid *first;
6035 
6036 		view->count = 0;
6037 		first = STAILQ_FIRST(&s->blamed_commits);
6038 		if (!got_object_id_cmp(&first->id, s->commit_id))
6039 			break;
6040 		s->done = 1;
6041 		thread_err = stop_blame(&s->blame);
6042 		s->done = 0;
6043 		if (thread_err)
6044 			break;
6045 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6046 		got_object_qid_free(s->blamed_commit);
6047 		s->blamed_commit =
6048 		    STAILQ_FIRST(&s->blamed_commits);
6049 		err = run_blame(view);
6050 		if (err)
6051 			break;
6052 		break;
6053 	}
6054 	case 'L':
6055 		view->count = 0;
6056 		s->id_to_log = get_selected_commit_id(s->blame.lines,
6057 		    s->blame.nlines, s->first_displayed_line, s->selected_line);
6058 		if (s->id_to_log)
6059 			err = view_request_new(new_view, view, TOG_VIEW_LOG);
6060 		break;
6061 	case KEY_ENTER:
6062 	case '\r': {
6063 		struct got_object_id *id = NULL;
6064 		struct got_object_qid *pid;
6065 		struct got_commit_object *commit = NULL;
6066 
6067 		view->count = 0;
6068 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
6069 		    s->first_displayed_line, s->selected_line);
6070 		if (id == NULL)
6071 			break;
6072 		err = got_object_open_as_commit(&commit, s->repo, id);
6073 		if (err)
6074 			break;
6075 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
6076 		if (*new_view) {
6077 			/* traversed from diff view, release diff resources  */
6078 			err = close_diff_view(*new_view);
6079 			if (err)
6080 				break;
6081 			diff_view = *new_view;
6082 		} else {
6083 			if (view_is_parent_view(view))
6084 				view_get_split(view, &begin_y, &begin_x);
6085 
6086 			diff_view = view_open(0, 0, begin_y, begin_x,
6087 			    TOG_VIEW_DIFF);
6088 			if (diff_view == NULL) {
6089 				got_object_commit_close(commit);
6090 				err = got_error_from_errno("view_open");
6091 				break;
6092 			}
6093 		}
6094 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
6095 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
6096 		got_object_commit_close(commit);
6097 		if (err) {
6098 			view_close(diff_view);
6099 			break;
6100 		}
6101 		s->last_diffed_line = s->first_displayed_line - 1 +
6102 		    s->selected_line;
6103 		if (*new_view)
6104 			break;	/* still open from active diff view */
6105 		if (view_is_parent_view(view) &&
6106 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6107 			err = view_init_hsplit(view, begin_y);
6108 			if (err)
6109 				break;
6110 		}
6111 
6112 		view->focussed = 0;
6113 		diff_view->focussed = 1;
6114 		diff_view->mode = view->mode;
6115 		diff_view->nlines = view->lines - begin_y;
6116 		if (view_is_parent_view(view)) {
6117 			view_transfer_size(diff_view, view);
6118 			err = view_close_child(view);
6119 			if (err)
6120 				break;
6121 			err = view_set_child(view, diff_view);
6122 			if (err)
6123 				break;
6124 			view->focus_child = 1;
6125 		} else
6126 			*new_view = diff_view;
6127 		if (err)
6128 			break;
6129 		break;
6130 	}
6131 	case CTRL('d'):
6132 	case 'd':
6133 		nscroll /= 2;
6134 		/* FALL THROUGH */
6135 	case KEY_NPAGE:
6136 	case CTRL('f'):
6137 	case 'f':
6138 	case ' ':
6139 		if (s->last_displayed_line >= s->blame.nlines &&
6140 		    s->selected_line >= MIN(s->blame.nlines,
6141 		    view->nlines - 2)) {
6142 			view->count = 0;
6143 			break;
6144 		}
6145 		if (s->last_displayed_line >= s->blame.nlines &&
6146 		    s->selected_line < view->nlines - 2) {
6147 			s->selected_line +=
6148 			    MIN(nscroll, s->last_displayed_line -
6149 			    s->first_displayed_line - s->selected_line + 1);
6150 		}
6151 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
6152 			s->first_displayed_line += nscroll;
6153 		else
6154 			s->first_displayed_line =
6155 			    s->blame.nlines - (view->nlines - 3);
6156 		break;
6157 	case KEY_RESIZE:
6158 		if (s->selected_line > view->nlines - 2) {
6159 			s->selected_line = MIN(s->blame.nlines,
6160 			    view->nlines - 2);
6161 		}
6162 		break;
6163 	default:
6164 		view->count = 0;
6165 		break;
6166 	}
6167 	return thread_err ? thread_err : err;
6168 }
6169 
6170 static const struct got_error *
6171 reset_blame_view(struct tog_view *view)
6172 {
6173 	const struct got_error *err;
6174 	struct tog_blame_view_state *s = &view->state.blame;
6175 
6176 	view->count = 0;
6177 	s->done = 1;
6178 	err = stop_blame(&s->blame);
6179 	s->done = 0;
6180 	if (err)
6181 		return err;
6182 	return run_blame(view);
6183 }
6184 
6185 static const struct got_error *
6186 cmd_blame(int argc, char *argv[])
6187 {
6188 	const struct got_error *error;
6189 	struct got_repository *repo = NULL;
6190 	struct got_worktree *worktree = NULL;
6191 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6192 	char *link_target = NULL;
6193 	struct got_object_id *commit_id = NULL;
6194 	struct got_commit_object *commit = NULL;
6195 	char *commit_id_str = NULL;
6196 	int ch;
6197 	struct tog_view *view;
6198 	int *pack_fds = NULL;
6199 
6200 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6201 		switch (ch) {
6202 		case 'c':
6203 			commit_id_str = optarg;
6204 			break;
6205 		case 'r':
6206 			repo_path = realpath(optarg, NULL);
6207 			if (repo_path == NULL)
6208 				return got_error_from_errno2("realpath",
6209 				    optarg);
6210 			break;
6211 		default:
6212 			usage_blame();
6213 			/* NOTREACHED */
6214 		}
6215 	}
6216 
6217 	argc -= optind;
6218 	argv += optind;
6219 
6220 	if (argc != 1)
6221 		usage_blame();
6222 
6223 	error = got_repo_pack_fds_open(&pack_fds);
6224 	if (error != NULL)
6225 		goto done;
6226 
6227 	if (repo_path == NULL) {
6228 		cwd = getcwd(NULL, 0);
6229 		if (cwd == NULL)
6230 			return got_error_from_errno("getcwd");
6231 		error = got_worktree_open(&worktree, cwd);
6232 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6233 			goto done;
6234 		if (worktree)
6235 			repo_path =
6236 			    strdup(got_worktree_get_repo_path(worktree));
6237 		else
6238 			repo_path = strdup(cwd);
6239 		if (repo_path == NULL) {
6240 			error = got_error_from_errno("strdup");
6241 			goto done;
6242 		}
6243 	}
6244 
6245 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6246 	if (error != NULL)
6247 		goto done;
6248 
6249 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
6250 	    worktree);
6251 	if (error)
6252 		goto done;
6253 
6254 	init_curses();
6255 
6256 	error = apply_unveil(got_repo_get_path(repo), NULL);
6257 	if (error)
6258 		goto done;
6259 
6260 	error = tog_load_refs(repo, 0);
6261 	if (error)
6262 		goto done;
6263 
6264 	if (commit_id_str == NULL) {
6265 		struct got_reference *head_ref;
6266 		error = got_ref_open(&head_ref, repo, worktree ?
6267 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
6268 		if (error != NULL)
6269 			goto done;
6270 		error = got_ref_resolve(&commit_id, repo, head_ref);
6271 		got_ref_close(head_ref);
6272 	} else {
6273 		error = got_repo_match_object_id(&commit_id, NULL,
6274 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6275 	}
6276 	if (error != NULL)
6277 		goto done;
6278 
6279 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
6280 	if (view == NULL) {
6281 		error = got_error_from_errno("view_open");
6282 		goto done;
6283 	}
6284 
6285 	error = got_object_open_as_commit(&commit, repo, commit_id);
6286 	if (error)
6287 		goto done;
6288 
6289 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
6290 	    commit, repo);
6291 	if (error)
6292 		goto done;
6293 
6294 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
6295 	    commit_id, repo);
6296 	if (error)
6297 		goto done;
6298 	if (worktree) {
6299 		/* Release work tree lock. */
6300 		got_worktree_close(worktree);
6301 		worktree = NULL;
6302 	}
6303 	error = view_loop(view);
6304 done:
6305 	free(repo_path);
6306 	free(in_repo_path);
6307 	free(link_target);
6308 	free(cwd);
6309 	free(commit_id);
6310 	if (commit)
6311 		got_object_commit_close(commit);
6312 	if (worktree)
6313 		got_worktree_close(worktree);
6314 	if (repo) {
6315 		const struct got_error *close_err = got_repo_close(repo);
6316 		if (error == NULL)
6317 			error = close_err;
6318 	}
6319 	if (pack_fds) {
6320 		const struct got_error *pack_err =
6321 		    got_repo_pack_fds_close(pack_fds);
6322 		if (error == NULL)
6323 			error = pack_err;
6324 	}
6325 	tog_free_refs();
6326 	return error;
6327 }
6328 
6329 static const struct got_error *
6330 draw_tree_entries(struct tog_view *view, const char *parent_path)
6331 {
6332 	struct tog_tree_view_state *s = &view->state.tree;
6333 	const struct got_error *err = NULL;
6334 	struct got_tree_entry *te;
6335 	wchar_t *wline;
6336 	struct tog_color *tc;
6337 	int width, n, nentries, i = 1;
6338 	int limit = view->nlines;
6339 
6340 	s->ndisplayed = 0;
6341 	if (view_is_hsplit_top(view))
6342 		--limit;  /* border */
6343 
6344 	werase(view->window);
6345 
6346 	if (limit == 0)
6347 		return NULL;
6348 
6349 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
6350 	    0, 0);
6351 	if (err)
6352 		return err;
6353 	if (view_needs_focus_indication(view))
6354 		wstandout(view->window);
6355 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6356 	if (tc)
6357 		wattr_on(view->window,
6358 		    COLOR_PAIR(tc->colorpair), NULL);
6359 	waddwstr(view->window, wline);
6360 	if (tc)
6361 		wattr_off(view->window,
6362 		    COLOR_PAIR(tc->colorpair), NULL);
6363 	if (view_needs_focus_indication(view))
6364 		wstandend(view->window);
6365 	free(wline);
6366 	wline = NULL;
6367 
6368 	if (s->selected_entry) {
6369 		i = got_tree_entry_get_index(s->selected_entry);
6370 		i += s->tree == s->root ? 1 : 2;  /* account for ".." entry */
6371 	}
6372 	nentries = got_object_tree_get_nentries(s->tree);
6373 	wprintw(view->window, " [%d/%d]", i,
6374 	    nentries + (s->tree == s->root ? 0 : 1));  /* ".." in !root tree */
6375 
6376 	if (width < view->ncols - 1)
6377 		waddch(view->window, '\n');
6378 	if (--limit <= 0)
6379 		return NULL;
6380 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
6381 	    0, 0);
6382 	if (err)
6383 		return err;
6384 	waddwstr(view->window, wline);
6385 	free(wline);
6386 	wline = NULL;
6387 	if (width < view->ncols - 1)
6388 		waddch(view->window, '\n');
6389 	if (--limit <= 0)
6390 		return NULL;
6391 	waddch(view->window, '\n');
6392 	if (--limit <= 0)
6393 		return NULL;
6394 
6395 	if (s->first_displayed_entry == NULL) {
6396 		te = got_object_tree_get_first_entry(s->tree);
6397 		if (s->selected == 0) {
6398 			if (view->focussed)
6399 				wstandout(view->window);
6400 			s->selected_entry = NULL;
6401 		}
6402 		waddstr(view->window, "  ..\n");	/* parent directory */
6403 		if (s->selected == 0 && view->focussed)
6404 			wstandend(view->window);
6405 		s->ndisplayed++;
6406 		if (--limit <= 0)
6407 			return NULL;
6408 		n = 1;
6409 	} else {
6410 		n = 0;
6411 		te = s->first_displayed_entry;
6412 	}
6413 
6414 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
6415 		char *line = NULL, *id_str = NULL, *link_target = NULL;
6416 		const char *modestr = "";
6417 		mode_t mode;
6418 
6419 		te = got_object_tree_get_entry(s->tree, i);
6420 		mode = got_tree_entry_get_mode(te);
6421 
6422 		if (s->show_ids) {
6423 			err = got_object_id_str(&id_str,
6424 			    got_tree_entry_get_id(te));
6425 			if (err)
6426 				return got_error_from_errno(
6427 				    "got_object_id_str");
6428 		}
6429 		if (got_object_tree_entry_is_submodule(te))
6430 			modestr = "$";
6431 		else if (S_ISLNK(mode)) {
6432 			int i;
6433 
6434 			err = got_tree_entry_get_symlink_target(&link_target,
6435 			    te, s->repo);
6436 			if (err) {
6437 				free(id_str);
6438 				return err;
6439 			}
6440 			for (i = 0; i < strlen(link_target); i++) {
6441 				if (!isprint((unsigned char)link_target[i]))
6442 					link_target[i] = '?';
6443 			}
6444 			modestr = "@";
6445 		}
6446 		else if (S_ISDIR(mode))
6447 			modestr = "/";
6448 		else if (mode & S_IXUSR)
6449 			modestr = "*";
6450 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
6451 		    got_tree_entry_get_name(te), modestr,
6452 		    link_target ? " -> ": "",
6453 		    link_target ? link_target : "") == -1) {
6454 			free(id_str);
6455 			free(link_target);
6456 			return got_error_from_errno("asprintf");
6457 		}
6458 		free(id_str);
6459 		free(link_target);
6460 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6461 		    0, 0);
6462 		if (err) {
6463 			free(line);
6464 			break;
6465 		}
6466 		if (n == s->selected) {
6467 			if (view->focussed)
6468 				wstandout(view->window);
6469 			s->selected_entry = te;
6470 		}
6471 		tc = match_color(&s->colors, line);
6472 		if (tc)
6473 			wattr_on(view->window,
6474 			    COLOR_PAIR(tc->colorpair), NULL);
6475 		waddwstr(view->window, wline);
6476 		if (tc)
6477 			wattr_off(view->window,
6478 			    COLOR_PAIR(tc->colorpair), NULL);
6479 		if (width < view->ncols - 1)
6480 			waddch(view->window, '\n');
6481 		if (n == s->selected && view->focussed)
6482 			wstandend(view->window);
6483 		free(line);
6484 		free(wline);
6485 		wline = NULL;
6486 		n++;
6487 		s->ndisplayed++;
6488 		s->last_displayed_entry = te;
6489 		if (--limit <= 0)
6490 			break;
6491 	}
6492 
6493 	return err;
6494 }
6495 
6496 static void
6497 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
6498 {
6499 	struct got_tree_entry *te;
6500 	int isroot = s->tree == s->root;
6501 	int i = 0;
6502 
6503 	if (s->first_displayed_entry == NULL)
6504 		return;
6505 
6506 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
6507 	while (i++ < maxscroll) {
6508 		if (te == NULL) {
6509 			if (!isroot)
6510 				s->first_displayed_entry = NULL;
6511 			break;
6512 		}
6513 		s->first_displayed_entry = te;
6514 		te = got_tree_entry_get_prev(s->tree, te);
6515 	}
6516 }
6517 
6518 static const struct got_error *
6519 tree_scroll_down(struct tog_view *view, int maxscroll)
6520 {
6521 	struct tog_tree_view_state *s = &view->state.tree;
6522 	struct got_tree_entry *next, *last;
6523 	int n = 0;
6524 
6525 	if (s->first_displayed_entry)
6526 		next = got_tree_entry_get_next(s->tree,
6527 		    s->first_displayed_entry);
6528 	else
6529 		next = got_object_tree_get_first_entry(s->tree);
6530 
6531 	last = s->last_displayed_entry;
6532 	while (next && n++ < maxscroll) {
6533 		if (last) {
6534 			s->last_displayed_entry = last;
6535 			last = got_tree_entry_get_next(s->tree, last);
6536 		}
6537 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
6538 			s->first_displayed_entry = next;
6539 			next = got_tree_entry_get_next(s->tree, next);
6540 		}
6541 	}
6542 
6543 	return NULL;
6544 }
6545 
6546 static const struct got_error *
6547 tree_entry_path(char **path, struct tog_parent_trees *parents,
6548     struct got_tree_entry *te)
6549 {
6550 	const struct got_error *err = NULL;
6551 	struct tog_parent_tree *pt;
6552 	size_t len = 2; /* for leading slash and NUL */
6553 
6554 	TAILQ_FOREACH(pt, parents, entry)
6555 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
6556 		    + 1 /* slash */;
6557 	if (te)
6558 		len += strlen(got_tree_entry_get_name(te));
6559 
6560 	*path = calloc(1, len);
6561 	if (path == NULL)
6562 		return got_error_from_errno("calloc");
6563 
6564 	(*path)[0] = '/';
6565 	pt = TAILQ_LAST(parents, tog_parent_trees);
6566 	while (pt) {
6567 		const char *name = got_tree_entry_get_name(pt->selected_entry);
6568 		if (strlcat(*path, name, len) >= len) {
6569 			err = got_error(GOT_ERR_NO_SPACE);
6570 			goto done;
6571 		}
6572 		if (strlcat(*path, "/", len) >= len) {
6573 			err = got_error(GOT_ERR_NO_SPACE);
6574 			goto done;
6575 		}
6576 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
6577 	}
6578 	if (te) {
6579 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
6580 			err = got_error(GOT_ERR_NO_SPACE);
6581 			goto done;
6582 		}
6583 	}
6584 done:
6585 	if (err) {
6586 		free(*path);
6587 		*path = NULL;
6588 	}
6589 	return err;
6590 }
6591 
6592 static const struct got_error *
6593 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6594     struct got_tree_entry *te, struct tog_parent_trees *parents,
6595     struct got_object_id *commit_id, struct got_repository *repo)
6596 {
6597 	const struct got_error *err = NULL;
6598 	char *path;
6599 	struct tog_view *blame_view;
6600 
6601 	*new_view = NULL;
6602 
6603 	err = tree_entry_path(&path, parents, te);
6604 	if (err)
6605 		return err;
6606 
6607 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
6608 	if (blame_view == NULL) {
6609 		err = got_error_from_errno("view_open");
6610 		goto done;
6611 	}
6612 
6613 	err = open_blame_view(blame_view, path, commit_id, repo);
6614 	if (err) {
6615 		if (err->code == GOT_ERR_CANCELLED)
6616 			err = NULL;
6617 		view_close(blame_view);
6618 	} else
6619 		*new_view = blame_view;
6620 done:
6621 	free(path);
6622 	return err;
6623 }
6624 
6625 static const struct got_error *
6626 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6627     struct tog_tree_view_state *s)
6628 {
6629 	struct tog_view *log_view;
6630 	const struct got_error *err = NULL;
6631 	char *path;
6632 
6633 	*new_view = NULL;
6634 
6635 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6636 	if (log_view == NULL)
6637 		return got_error_from_errno("view_open");
6638 
6639 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
6640 	if (err)
6641 		return err;
6642 
6643 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
6644 	    path, 0);
6645 	if (err)
6646 		view_close(log_view);
6647 	else
6648 		*new_view = log_view;
6649 	free(path);
6650 	return err;
6651 }
6652 
6653 static const struct got_error *
6654 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
6655     const char *head_ref_name, struct got_repository *repo)
6656 {
6657 	const struct got_error *err = NULL;
6658 	char *commit_id_str = NULL;
6659 	struct tog_tree_view_state *s = &view->state.tree;
6660 	struct got_commit_object *commit = NULL;
6661 
6662 	TAILQ_INIT(&s->parents);
6663 	STAILQ_INIT(&s->colors);
6664 
6665 	s->commit_id = got_object_id_dup(commit_id);
6666 	if (s->commit_id == NULL)
6667 		return got_error_from_errno("got_object_id_dup");
6668 
6669 	err = got_object_open_as_commit(&commit, repo, commit_id);
6670 	if (err)
6671 		goto done;
6672 
6673 	/*
6674 	 * The root is opened here and will be closed when the view is closed.
6675 	 * Any visited subtrees and their path-wise parents are opened and
6676 	 * closed on demand.
6677 	 */
6678 	err = got_object_open_as_tree(&s->root, repo,
6679 	    got_object_commit_get_tree_id(commit));
6680 	if (err)
6681 		goto done;
6682 	s->tree = s->root;
6683 
6684 	err = got_object_id_str(&commit_id_str, commit_id);
6685 	if (err != NULL)
6686 		goto done;
6687 
6688 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
6689 		err = got_error_from_errno("asprintf");
6690 		goto done;
6691 	}
6692 
6693 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
6694 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
6695 	if (head_ref_name) {
6696 		s->head_ref_name = strdup(head_ref_name);
6697 		if (s->head_ref_name == NULL) {
6698 			err = got_error_from_errno("strdup");
6699 			goto done;
6700 		}
6701 	}
6702 	s->repo = repo;
6703 
6704 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6705 		err = add_color(&s->colors, "\\$$",
6706 		    TOG_COLOR_TREE_SUBMODULE,
6707 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
6708 		if (err)
6709 			goto done;
6710 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
6711 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
6712 		if (err)
6713 			goto done;
6714 		err = add_color(&s->colors, "/$",
6715 		    TOG_COLOR_TREE_DIRECTORY,
6716 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
6717 		if (err)
6718 			goto done;
6719 
6720 		err = add_color(&s->colors, "\\*$",
6721 		    TOG_COLOR_TREE_EXECUTABLE,
6722 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
6723 		if (err)
6724 			goto done;
6725 
6726 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
6727 		    get_color_value("TOG_COLOR_COMMIT"));
6728 		if (err)
6729 			goto done;
6730 	}
6731 
6732 	view->show = show_tree_view;
6733 	view->input = input_tree_view;
6734 	view->close = close_tree_view;
6735 	view->search_start = search_start_tree_view;
6736 	view->search_next = search_next_tree_view;
6737 done:
6738 	free(commit_id_str);
6739 	if (commit)
6740 		got_object_commit_close(commit);
6741 	if (err)
6742 		close_tree_view(view);
6743 	return err;
6744 }
6745 
6746 static const struct got_error *
6747 close_tree_view(struct tog_view *view)
6748 {
6749 	struct tog_tree_view_state *s = &view->state.tree;
6750 
6751 	free_colors(&s->colors);
6752 	free(s->tree_label);
6753 	s->tree_label = NULL;
6754 	free(s->commit_id);
6755 	s->commit_id = NULL;
6756 	free(s->head_ref_name);
6757 	s->head_ref_name = NULL;
6758 	while (!TAILQ_EMPTY(&s->parents)) {
6759 		struct tog_parent_tree *parent;
6760 		parent = TAILQ_FIRST(&s->parents);
6761 		TAILQ_REMOVE(&s->parents, parent, entry);
6762 		if (parent->tree != s->root)
6763 			got_object_tree_close(parent->tree);
6764 		free(parent);
6765 
6766 	}
6767 	if (s->tree != NULL && s->tree != s->root)
6768 		got_object_tree_close(s->tree);
6769 	if (s->root)
6770 		got_object_tree_close(s->root);
6771 	return NULL;
6772 }
6773 
6774 static const struct got_error *
6775 search_start_tree_view(struct tog_view *view)
6776 {
6777 	struct tog_tree_view_state *s = &view->state.tree;
6778 
6779 	s->matched_entry = NULL;
6780 	return NULL;
6781 }
6782 
6783 static int
6784 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
6785 {
6786 	regmatch_t regmatch;
6787 
6788 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
6789 	    0) == 0;
6790 }
6791 
6792 static const struct got_error *
6793 search_next_tree_view(struct tog_view *view)
6794 {
6795 	struct tog_tree_view_state *s = &view->state.tree;
6796 	struct got_tree_entry *te = NULL;
6797 
6798 	if (!view->searching) {
6799 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6800 		return NULL;
6801 	}
6802 
6803 	if (s->matched_entry) {
6804 		if (view->searching == TOG_SEARCH_FORWARD) {
6805 			if (s->selected_entry)
6806 				te = got_tree_entry_get_next(s->tree,
6807 				    s->selected_entry);
6808 			else
6809 				te = got_object_tree_get_first_entry(s->tree);
6810 		} else {
6811 			if (s->selected_entry == NULL)
6812 				te = got_object_tree_get_last_entry(s->tree);
6813 			else
6814 				te = got_tree_entry_get_prev(s->tree,
6815 				    s->selected_entry);
6816 		}
6817 	} else {
6818 		if (s->selected_entry)
6819 			te = s->selected_entry;
6820 		else if (view->searching == TOG_SEARCH_FORWARD)
6821 			te = got_object_tree_get_first_entry(s->tree);
6822 		else
6823 			te = got_object_tree_get_last_entry(s->tree);
6824 	}
6825 
6826 	while (1) {
6827 		if (te == NULL) {
6828 			if (s->matched_entry == NULL) {
6829 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6830 				return NULL;
6831 			}
6832 			if (view->searching == TOG_SEARCH_FORWARD)
6833 				te = got_object_tree_get_first_entry(s->tree);
6834 			else
6835 				te = got_object_tree_get_last_entry(s->tree);
6836 		}
6837 
6838 		if (match_tree_entry(te, &view->regex)) {
6839 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6840 			s->matched_entry = te;
6841 			break;
6842 		}
6843 
6844 		if (view->searching == TOG_SEARCH_FORWARD)
6845 			te = got_tree_entry_get_next(s->tree, te);
6846 		else
6847 			te = got_tree_entry_get_prev(s->tree, te);
6848 	}
6849 
6850 	if (s->matched_entry) {
6851 		s->first_displayed_entry = s->matched_entry;
6852 		s->selected = 0;
6853 	}
6854 
6855 	return NULL;
6856 }
6857 
6858 static const struct got_error *
6859 show_tree_view(struct tog_view *view)
6860 {
6861 	const struct got_error *err = NULL;
6862 	struct tog_tree_view_state *s = &view->state.tree;
6863 	char *parent_path;
6864 
6865 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6866 	if (err)
6867 		return err;
6868 
6869 	err = draw_tree_entries(view, parent_path);
6870 	free(parent_path);
6871 
6872 	view_border(view);
6873 	return err;
6874 }
6875 
6876 static const struct got_error *
6877 tree_goto_line(struct tog_view *view, int nlines)
6878 {
6879 	const struct got_error		 *err = NULL;
6880 	struct tog_tree_view_state	 *s = &view->state.tree;
6881 	struct got_tree_entry		**fte, **lte, **ste;
6882 	int				  g, last, first = 1, i = 1;
6883 	int				  root = s->tree == s->root;
6884 	int				  off = root ? 1 : 2;
6885 
6886 	g = view->gline;
6887 	view->gline = 0;
6888 
6889 	if (g == 0)
6890 		g = 1;
6891 	else if (g > got_object_tree_get_nentries(s->tree))
6892 		g = got_object_tree_get_nentries(s->tree) + (root ? 0 : 1);
6893 
6894 	fte = &s->first_displayed_entry;
6895 	lte = &s->last_displayed_entry;
6896 	ste = &s->selected_entry;
6897 
6898 	if (*fte != NULL) {
6899 		first = got_tree_entry_get_index(*fte);
6900 		first += off;  /* account for ".." */
6901 	}
6902 	last = got_tree_entry_get_index(*lte);
6903 	last += off;
6904 
6905 	if (g >= first && g <= last && g - first < nlines) {
6906 		s->selected = g - first;
6907 		return NULL;	/* gline is on the current page */
6908 	}
6909 
6910 	if (*ste != NULL) {
6911 		i = got_tree_entry_get_index(*ste);
6912 		i += off;
6913 	}
6914 
6915 	if (i < g) {
6916 		err = tree_scroll_down(view, g - i);
6917 		if (err)
6918 			return err;
6919 		if (got_tree_entry_get_index(*lte) >=
6920 		    got_object_tree_get_nentries(s->tree) - 1 &&
6921 		    first + s->selected < g &&
6922 		    s->selected < s->ndisplayed - 1) {
6923 			first = got_tree_entry_get_index(*fte);
6924 			first += off;
6925 			s->selected = g - first;
6926 		}
6927 	} else if (i > g)
6928 		tree_scroll_up(s, i - g);
6929 
6930 	if (g < nlines &&
6931 	    (*fte == NULL || (root && !got_tree_entry_get_index(*fte))))
6932 		s->selected = g - 1;
6933 
6934 	return NULL;
6935 }
6936 
6937 static const struct got_error *
6938 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6939 {
6940 	const struct got_error *err = NULL;
6941 	struct tog_tree_view_state *s = &view->state.tree;
6942 	struct got_tree_entry *te;
6943 	int n, nscroll = view->nlines - 3;
6944 
6945 	if (view->gline)
6946 		return tree_goto_line(view, nscroll);
6947 
6948 	switch (ch) {
6949 	case 'i':
6950 		s->show_ids = !s->show_ids;
6951 		view->count = 0;
6952 		break;
6953 	case 'L':
6954 		view->count = 0;
6955 		if (!s->selected_entry)
6956 			break;
6957 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
6958 		break;
6959 	case 'R':
6960 		view->count = 0;
6961 		err = view_request_new(new_view, view, TOG_VIEW_REF);
6962 		break;
6963 	case 'g':
6964 	case KEY_HOME:
6965 		s->selected = 0;
6966 		view->count = 0;
6967 		if (s->tree == s->root)
6968 			s->first_displayed_entry =
6969 			    got_object_tree_get_first_entry(s->tree);
6970 		else
6971 			s->first_displayed_entry = NULL;
6972 		break;
6973 	case 'G':
6974 	case KEY_END: {
6975 		int eos = view->nlines - 3;
6976 
6977 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
6978 			--eos;  /* border */
6979 		s->selected = 0;
6980 		view->count = 0;
6981 		te = got_object_tree_get_last_entry(s->tree);
6982 		for (n = 0; n < eos; n++) {
6983 			if (te == NULL) {
6984 				if (s->tree != s->root) {
6985 					s->first_displayed_entry = NULL;
6986 					n++;
6987 				}
6988 				break;
6989 			}
6990 			s->first_displayed_entry = te;
6991 			te = got_tree_entry_get_prev(s->tree, te);
6992 		}
6993 		if (n > 0)
6994 			s->selected = n - 1;
6995 		break;
6996 	}
6997 	case 'k':
6998 	case KEY_UP:
6999 	case CTRL('p'):
7000 		if (s->selected > 0) {
7001 			s->selected--;
7002 			break;
7003 		}
7004 		tree_scroll_up(s, 1);
7005 		if (s->selected_entry == NULL ||
7006 		    (s->tree == s->root && s->selected_entry ==
7007 		     got_object_tree_get_first_entry(s->tree)))
7008 			view->count = 0;
7009 		break;
7010 	case CTRL('u'):
7011 	case 'u':
7012 		nscroll /= 2;
7013 		/* FALL THROUGH */
7014 	case KEY_PPAGE:
7015 	case CTRL('b'):
7016 	case 'b':
7017 		if (s->tree == s->root) {
7018 			if (got_object_tree_get_first_entry(s->tree) ==
7019 			    s->first_displayed_entry)
7020 				s->selected -= MIN(s->selected, nscroll);
7021 		} else {
7022 			if (s->first_displayed_entry == NULL)
7023 				s->selected -= MIN(s->selected, nscroll);
7024 		}
7025 		tree_scroll_up(s, MAX(0, nscroll));
7026 		if (s->selected_entry == NULL ||
7027 		    (s->tree == s->root && s->selected_entry ==
7028 		     got_object_tree_get_first_entry(s->tree)))
7029 			view->count = 0;
7030 		break;
7031 	case 'j':
7032 	case KEY_DOWN:
7033 	case CTRL('n'):
7034 		if (s->selected < s->ndisplayed - 1) {
7035 			s->selected++;
7036 			break;
7037 		}
7038 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7039 		    == NULL) {
7040 			/* can't scroll any further */
7041 			view->count = 0;
7042 			break;
7043 		}
7044 		tree_scroll_down(view, 1);
7045 		break;
7046 	case CTRL('d'):
7047 	case 'd':
7048 		nscroll /= 2;
7049 		/* FALL THROUGH */
7050 	case KEY_NPAGE:
7051 	case CTRL('f'):
7052 	case 'f':
7053 	case ' ':
7054 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7055 		    == NULL) {
7056 			/* can't scroll any further; move cursor down */
7057 			if (s->selected < s->ndisplayed - 1)
7058 				s->selected += MIN(nscroll,
7059 				    s->ndisplayed - s->selected - 1);
7060 			else
7061 				view->count = 0;
7062 			break;
7063 		}
7064 		tree_scroll_down(view, nscroll);
7065 		break;
7066 	case KEY_ENTER:
7067 	case '\r':
7068 	case KEY_BACKSPACE:
7069 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
7070 			struct tog_parent_tree *parent;
7071 			/* user selected '..' */
7072 			if (s->tree == s->root) {
7073 				view->count = 0;
7074 				break;
7075 			}
7076 			parent = TAILQ_FIRST(&s->parents);
7077 			TAILQ_REMOVE(&s->parents, parent,
7078 			    entry);
7079 			got_object_tree_close(s->tree);
7080 			s->tree = parent->tree;
7081 			s->first_displayed_entry =
7082 			    parent->first_displayed_entry;
7083 			s->selected_entry =
7084 			    parent->selected_entry;
7085 			s->selected = parent->selected;
7086 			if (s->selected > view->nlines - 3) {
7087 				err = offset_selection_down(view);
7088 				if (err)
7089 					break;
7090 			}
7091 			free(parent);
7092 		} else if (S_ISDIR(got_tree_entry_get_mode(
7093 		    s->selected_entry))) {
7094 			struct got_tree_object *subtree;
7095 			view->count = 0;
7096 			err = got_object_open_as_tree(&subtree, s->repo,
7097 			    got_tree_entry_get_id(s->selected_entry));
7098 			if (err)
7099 				break;
7100 			err = tree_view_visit_subtree(s, subtree);
7101 			if (err) {
7102 				got_object_tree_close(subtree);
7103 				break;
7104 			}
7105 		} else if (S_ISREG(got_tree_entry_get_mode(s->selected_entry)))
7106 			err = view_request_new(new_view, view, TOG_VIEW_BLAME);
7107 		break;
7108 	case KEY_RESIZE:
7109 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
7110 			s->selected = view->nlines - 4;
7111 		view->count = 0;
7112 		break;
7113 	default:
7114 		view->count = 0;
7115 		break;
7116 	}
7117 
7118 	return err;
7119 }
7120 
7121 __dead static void
7122 usage_tree(void)
7123 {
7124 	endwin();
7125 	fprintf(stderr,
7126 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
7127 	    getprogname());
7128 	exit(1);
7129 }
7130 
7131 static const struct got_error *
7132 cmd_tree(int argc, char *argv[])
7133 {
7134 	const struct got_error *error;
7135 	struct got_repository *repo = NULL;
7136 	struct got_worktree *worktree = NULL;
7137 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7138 	struct got_object_id *commit_id = NULL;
7139 	struct got_commit_object *commit = NULL;
7140 	const char *commit_id_arg = NULL;
7141 	char *label = NULL;
7142 	struct got_reference *ref = NULL;
7143 	const char *head_ref_name = NULL;
7144 	int ch;
7145 	struct tog_view *view;
7146 	int *pack_fds = NULL;
7147 
7148 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7149 		switch (ch) {
7150 		case 'c':
7151 			commit_id_arg = optarg;
7152 			break;
7153 		case 'r':
7154 			repo_path = realpath(optarg, NULL);
7155 			if (repo_path == NULL)
7156 				return got_error_from_errno2("realpath",
7157 				    optarg);
7158 			break;
7159 		default:
7160 			usage_tree();
7161 			/* NOTREACHED */
7162 		}
7163 	}
7164 
7165 	argc -= optind;
7166 	argv += optind;
7167 
7168 	if (argc > 1)
7169 		usage_tree();
7170 
7171 	error = got_repo_pack_fds_open(&pack_fds);
7172 	if (error != NULL)
7173 		goto done;
7174 
7175 	if (repo_path == NULL) {
7176 		cwd = getcwd(NULL, 0);
7177 		if (cwd == NULL)
7178 			return got_error_from_errno("getcwd");
7179 		error = got_worktree_open(&worktree, cwd);
7180 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7181 			goto done;
7182 		if (worktree)
7183 			repo_path =
7184 			    strdup(got_worktree_get_repo_path(worktree));
7185 		else
7186 			repo_path = strdup(cwd);
7187 		if (repo_path == NULL) {
7188 			error = got_error_from_errno("strdup");
7189 			goto done;
7190 		}
7191 	}
7192 
7193 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7194 	if (error != NULL)
7195 		goto done;
7196 
7197 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7198 	    repo, worktree);
7199 	if (error)
7200 		goto done;
7201 
7202 	init_curses();
7203 
7204 	error = apply_unveil(got_repo_get_path(repo), NULL);
7205 	if (error)
7206 		goto done;
7207 
7208 	error = tog_load_refs(repo, 0);
7209 	if (error)
7210 		goto done;
7211 
7212 	if (commit_id_arg == NULL) {
7213 		error = got_repo_match_object_id(&commit_id, &label,
7214 		    worktree ? got_worktree_get_head_ref_name(worktree) :
7215 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7216 		if (error)
7217 			goto done;
7218 		head_ref_name = label;
7219 	} else {
7220 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
7221 		if (error == NULL)
7222 			head_ref_name = got_ref_get_name(ref);
7223 		else if (error->code != GOT_ERR_NOT_REF)
7224 			goto done;
7225 		error = got_repo_match_object_id(&commit_id, NULL,
7226 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7227 		if (error)
7228 			goto done;
7229 	}
7230 
7231 	error = got_object_open_as_commit(&commit, repo, commit_id);
7232 	if (error)
7233 		goto done;
7234 
7235 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
7236 	if (view == NULL) {
7237 		error = got_error_from_errno("view_open");
7238 		goto done;
7239 	}
7240 	error = open_tree_view(view, commit_id, head_ref_name, repo);
7241 	if (error)
7242 		goto done;
7243 	if (!got_path_is_root_dir(in_repo_path)) {
7244 		error = tree_view_walk_path(&view->state.tree, commit,
7245 		    in_repo_path);
7246 		if (error)
7247 			goto done;
7248 	}
7249 
7250 	if (worktree) {
7251 		/* Release work tree lock. */
7252 		got_worktree_close(worktree);
7253 		worktree = NULL;
7254 	}
7255 	error = view_loop(view);
7256 done:
7257 	free(repo_path);
7258 	free(cwd);
7259 	free(commit_id);
7260 	free(label);
7261 	if (ref)
7262 		got_ref_close(ref);
7263 	if (repo) {
7264 		const struct got_error *close_err = got_repo_close(repo);
7265 		if (error == NULL)
7266 			error = close_err;
7267 	}
7268 	if (pack_fds) {
7269 		const struct got_error *pack_err =
7270 		    got_repo_pack_fds_close(pack_fds);
7271 		if (error == NULL)
7272 			error = pack_err;
7273 	}
7274 	tog_free_refs();
7275 	return error;
7276 }
7277 
7278 static const struct got_error *
7279 ref_view_load_refs(struct tog_ref_view_state *s)
7280 {
7281 	struct got_reflist_entry *sre;
7282 	struct tog_reflist_entry *re;
7283 
7284 	s->nrefs = 0;
7285 	TAILQ_FOREACH(sre, &tog_refs, entry) {
7286 		if (strncmp(got_ref_get_name(sre->ref),
7287 		    "refs/got/", 9) == 0 &&
7288 		    strncmp(got_ref_get_name(sre->ref),
7289 		    "refs/got/backup/", 16) != 0)
7290 			continue;
7291 
7292 		re = malloc(sizeof(*re));
7293 		if (re == NULL)
7294 			return got_error_from_errno("malloc");
7295 
7296 		re->ref = got_ref_dup(sre->ref);
7297 		if (re->ref == NULL)
7298 			return got_error_from_errno("got_ref_dup");
7299 		re->idx = s->nrefs++;
7300 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
7301 	}
7302 
7303 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7304 	return NULL;
7305 }
7306 
7307 static void
7308 ref_view_free_refs(struct tog_ref_view_state *s)
7309 {
7310 	struct tog_reflist_entry *re;
7311 
7312 	while (!TAILQ_EMPTY(&s->refs)) {
7313 		re = TAILQ_FIRST(&s->refs);
7314 		TAILQ_REMOVE(&s->refs, re, entry);
7315 		got_ref_close(re->ref);
7316 		free(re);
7317 	}
7318 }
7319 
7320 static const struct got_error *
7321 open_ref_view(struct tog_view *view, struct got_repository *repo)
7322 {
7323 	const struct got_error *err = NULL;
7324 	struct tog_ref_view_state *s = &view->state.ref;
7325 
7326 	s->selected_entry = 0;
7327 	s->repo = repo;
7328 
7329 	TAILQ_INIT(&s->refs);
7330 	STAILQ_INIT(&s->colors);
7331 
7332 	err = ref_view_load_refs(s);
7333 	if (err)
7334 		return err;
7335 
7336 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7337 		err = add_color(&s->colors, "^refs/heads/",
7338 		    TOG_COLOR_REFS_HEADS,
7339 		    get_color_value("TOG_COLOR_REFS_HEADS"));
7340 		if (err)
7341 			goto done;
7342 
7343 		err = add_color(&s->colors, "^refs/tags/",
7344 		    TOG_COLOR_REFS_TAGS,
7345 		    get_color_value("TOG_COLOR_REFS_TAGS"));
7346 		if (err)
7347 			goto done;
7348 
7349 		err = add_color(&s->colors, "^refs/remotes/",
7350 		    TOG_COLOR_REFS_REMOTES,
7351 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
7352 		if (err)
7353 			goto done;
7354 
7355 		err = add_color(&s->colors, "^refs/got/backup/",
7356 		    TOG_COLOR_REFS_BACKUP,
7357 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
7358 		if (err)
7359 			goto done;
7360 	}
7361 
7362 	view->show = show_ref_view;
7363 	view->input = input_ref_view;
7364 	view->close = close_ref_view;
7365 	view->search_start = search_start_ref_view;
7366 	view->search_next = search_next_ref_view;
7367 done:
7368 	if (err)
7369 		free_colors(&s->colors);
7370 	return err;
7371 }
7372 
7373 static const struct got_error *
7374 close_ref_view(struct tog_view *view)
7375 {
7376 	struct tog_ref_view_state *s = &view->state.ref;
7377 
7378 	ref_view_free_refs(s);
7379 	free_colors(&s->colors);
7380 
7381 	return NULL;
7382 }
7383 
7384 static const struct got_error *
7385 resolve_reflist_entry(struct got_object_id **commit_id,
7386     struct tog_reflist_entry *re, struct got_repository *repo)
7387 {
7388 	const struct got_error *err = NULL;
7389 	struct got_object_id *obj_id;
7390 	struct got_tag_object *tag = NULL;
7391 	int obj_type;
7392 
7393 	*commit_id = NULL;
7394 
7395 	err = got_ref_resolve(&obj_id, repo, re->ref);
7396 	if (err)
7397 		return err;
7398 
7399 	err = got_object_get_type(&obj_type, repo, obj_id);
7400 	if (err)
7401 		goto done;
7402 
7403 	switch (obj_type) {
7404 	case GOT_OBJ_TYPE_COMMIT:
7405 		*commit_id = obj_id;
7406 		break;
7407 	case GOT_OBJ_TYPE_TAG:
7408 		err = got_object_open_as_tag(&tag, repo, obj_id);
7409 		if (err)
7410 			goto done;
7411 		free(obj_id);
7412 		err = got_object_get_type(&obj_type, repo,
7413 		    got_object_tag_get_object_id(tag));
7414 		if (err)
7415 			goto done;
7416 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
7417 			err = got_error(GOT_ERR_OBJ_TYPE);
7418 			goto done;
7419 		}
7420 		*commit_id = got_object_id_dup(
7421 		    got_object_tag_get_object_id(tag));
7422 		if (*commit_id == NULL) {
7423 			err = got_error_from_errno("got_object_id_dup");
7424 			goto done;
7425 		}
7426 		break;
7427 	default:
7428 		err = got_error(GOT_ERR_OBJ_TYPE);
7429 		break;
7430 	}
7431 
7432 done:
7433 	if (tag)
7434 		got_object_tag_close(tag);
7435 	if (err) {
7436 		free(*commit_id);
7437 		*commit_id = NULL;
7438 	}
7439 	return err;
7440 }
7441 
7442 static const struct got_error *
7443 log_ref_entry(struct tog_view **new_view, int begin_y, int begin_x,
7444     struct tog_reflist_entry *re, struct got_repository *repo)
7445 {
7446 	struct tog_view *log_view;
7447 	const struct got_error *err = NULL;
7448 	struct got_object_id *commit_id = NULL;
7449 
7450 	*new_view = NULL;
7451 
7452 	err = resolve_reflist_entry(&commit_id, re, repo);
7453 	if (err) {
7454 		if (err->code != GOT_ERR_OBJ_TYPE)
7455 			return err;
7456 		else
7457 			return NULL;
7458 	}
7459 
7460 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7461 	if (log_view == NULL) {
7462 		err = got_error_from_errno("view_open");
7463 		goto done;
7464 	}
7465 
7466 	err = open_log_view(log_view, commit_id, repo,
7467 	    got_ref_get_name(re->ref), "", 0);
7468 done:
7469 	if (err)
7470 		view_close(log_view);
7471 	else
7472 		*new_view = log_view;
7473 	free(commit_id);
7474 	return err;
7475 }
7476 
7477 static void
7478 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
7479 {
7480 	struct tog_reflist_entry *re;
7481 	int i = 0;
7482 
7483 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7484 		return;
7485 
7486 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
7487 	while (i++ < maxscroll) {
7488 		if (re == NULL)
7489 			break;
7490 		s->first_displayed_entry = re;
7491 		re = TAILQ_PREV(re, tog_reflist_head, entry);
7492 	}
7493 }
7494 
7495 static const struct got_error *
7496 ref_scroll_down(struct tog_view *view, int maxscroll)
7497 {
7498 	struct tog_ref_view_state *s = &view->state.ref;
7499 	struct tog_reflist_entry *next, *last;
7500 	int n = 0;
7501 
7502 	if (s->first_displayed_entry)
7503 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
7504 	else
7505 		next = TAILQ_FIRST(&s->refs);
7506 
7507 	last = s->last_displayed_entry;
7508 	while (next && n++ < maxscroll) {
7509 		if (last) {
7510 			s->last_displayed_entry = last;
7511 			last = TAILQ_NEXT(last, entry);
7512 		}
7513 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN)) {
7514 			s->first_displayed_entry = next;
7515 			next = TAILQ_NEXT(next, entry);
7516 		}
7517 	}
7518 
7519 	return NULL;
7520 }
7521 
7522 static const struct got_error *
7523 search_start_ref_view(struct tog_view *view)
7524 {
7525 	struct tog_ref_view_state *s = &view->state.ref;
7526 
7527 	s->matched_entry = NULL;
7528 	return NULL;
7529 }
7530 
7531 static int
7532 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
7533 {
7534 	regmatch_t regmatch;
7535 
7536 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
7537 	    0) == 0;
7538 }
7539 
7540 static const struct got_error *
7541 search_next_ref_view(struct tog_view *view)
7542 {
7543 	struct tog_ref_view_state *s = &view->state.ref;
7544 	struct tog_reflist_entry *re = NULL;
7545 
7546 	if (!view->searching) {
7547 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7548 		return NULL;
7549 	}
7550 
7551 	if (s->matched_entry) {
7552 		if (view->searching == TOG_SEARCH_FORWARD) {
7553 			if (s->selected_entry)
7554 				re = TAILQ_NEXT(s->selected_entry, entry);
7555 			else
7556 				re = TAILQ_PREV(s->selected_entry,
7557 				    tog_reflist_head, entry);
7558 		} else {
7559 			if (s->selected_entry == NULL)
7560 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7561 			else
7562 				re = TAILQ_PREV(s->selected_entry,
7563 				    tog_reflist_head, entry);
7564 		}
7565 	} else {
7566 		if (s->selected_entry)
7567 			re = s->selected_entry;
7568 		else if (view->searching == TOG_SEARCH_FORWARD)
7569 			re = TAILQ_FIRST(&s->refs);
7570 		else
7571 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
7572 	}
7573 
7574 	while (1) {
7575 		if (re == NULL) {
7576 			if (s->matched_entry == NULL) {
7577 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7578 				return NULL;
7579 			}
7580 			if (view->searching == TOG_SEARCH_FORWARD)
7581 				re = TAILQ_FIRST(&s->refs);
7582 			else
7583 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7584 		}
7585 
7586 		if (match_reflist_entry(re, &view->regex)) {
7587 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7588 			s->matched_entry = re;
7589 			break;
7590 		}
7591 
7592 		if (view->searching == TOG_SEARCH_FORWARD)
7593 			re = TAILQ_NEXT(re, entry);
7594 		else
7595 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7596 	}
7597 
7598 	if (s->matched_entry) {
7599 		s->first_displayed_entry = s->matched_entry;
7600 		s->selected = 0;
7601 	}
7602 
7603 	return NULL;
7604 }
7605 
7606 static const struct got_error *
7607 show_ref_view(struct tog_view *view)
7608 {
7609 	const struct got_error *err = NULL;
7610 	struct tog_ref_view_state *s = &view->state.ref;
7611 	struct tog_reflist_entry *re;
7612 	char *line = NULL;
7613 	wchar_t *wline;
7614 	struct tog_color *tc;
7615 	int width, n;
7616 	int limit = view->nlines;
7617 
7618 	werase(view->window);
7619 
7620 	s->ndisplayed = 0;
7621 	if (view_is_hsplit_top(view))
7622 		--limit;  /* border */
7623 
7624 	if (limit == 0)
7625 		return NULL;
7626 
7627 	re = s->first_displayed_entry;
7628 
7629 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
7630 	    s->nrefs) == -1)
7631 		return got_error_from_errno("asprintf");
7632 
7633 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
7634 	if (err) {
7635 		free(line);
7636 		return err;
7637 	}
7638 	if (view_needs_focus_indication(view))
7639 		wstandout(view->window);
7640 	waddwstr(view->window, wline);
7641 	if (view_needs_focus_indication(view))
7642 		wstandend(view->window);
7643 	free(wline);
7644 	wline = NULL;
7645 	free(line);
7646 	line = NULL;
7647 	if (width < view->ncols - 1)
7648 		waddch(view->window, '\n');
7649 	if (--limit <= 0)
7650 		return NULL;
7651 
7652 	n = 0;
7653 	while (re && limit > 0) {
7654 		char *line = NULL;
7655 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
7656 
7657 		if (s->show_date) {
7658 			struct got_commit_object *ci;
7659 			struct got_tag_object *tag;
7660 			struct got_object_id *id;
7661 			struct tm tm;
7662 			time_t t;
7663 
7664 			err = got_ref_resolve(&id, s->repo, re->ref);
7665 			if (err)
7666 				return err;
7667 			err = got_object_open_as_tag(&tag, s->repo, id);
7668 			if (err) {
7669 				if (err->code != GOT_ERR_OBJ_TYPE) {
7670 					free(id);
7671 					return err;
7672 				}
7673 				err = got_object_open_as_commit(&ci, s->repo,
7674 				    id);
7675 				if (err) {
7676 					free(id);
7677 					return err;
7678 				}
7679 				t = got_object_commit_get_committer_time(ci);
7680 				got_object_commit_close(ci);
7681 			} else {
7682 				t = got_object_tag_get_tagger_time(tag);
7683 				got_object_tag_close(tag);
7684 			}
7685 			free(id);
7686 			if (gmtime_r(&t, &tm) == NULL)
7687 				return got_error_from_errno("gmtime_r");
7688 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
7689 				return got_error(GOT_ERR_NO_SPACE);
7690 		}
7691 		if (got_ref_is_symbolic(re->ref)) {
7692 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
7693 			    ymd : "", got_ref_get_name(re->ref),
7694 			    got_ref_get_symref_target(re->ref)) == -1)
7695 				return got_error_from_errno("asprintf");
7696 		} else if (s->show_ids) {
7697 			struct got_object_id *id;
7698 			char *id_str;
7699 			err = got_ref_resolve(&id, s->repo, re->ref);
7700 			if (err)
7701 				return err;
7702 			err = got_object_id_str(&id_str, id);
7703 			if (err) {
7704 				free(id);
7705 				return err;
7706 			}
7707 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
7708 			    got_ref_get_name(re->ref), id_str) == -1) {
7709 				err = got_error_from_errno("asprintf");
7710 				free(id);
7711 				free(id_str);
7712 				return err;
7713 			}
7714 			free(id);
7715 			free(id_str);
7716 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
7717 		    got_ref_get_name(re->ref)) == -1)
7718 			return got_error_from_errno("asprintf");
7719 
7720 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
7721 		    0, 0);
7722 		if (err) {
7723 			free(line);
7724 			return err;
7725 		}
7726 		if (n == s->selected) {
7727 			if (view->focussed)
7728 				wstandout(view->window);
7729 			s->selected_entry = re;
7730 		}
7731 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
7732 		if (tc)
7733 			wattr_on(view->window,
7734 			    COLOR_PAIR(tc->colorpair), NULL);
7735 		waddwstr(view->window, wline);
7736 		if (tc)
7737 			wattr_off(view->window,
7738 			    COLOR_PAIR(tc->colorpair), NULL);
7739 		if (width < view->ncols - 1)
7740 			waddch(view->window, '\n');
7741 		if (n == s->selected && view->focussed)
7742 			wstandend(view->window);
7743 		free(line);
7744 		free(wline);
7745 		wline = NULL;
7746 		n++;
7747 		s->ndisplayed++;
7748 		s->last_displayed_entry = re;
7749 
7750 		limit--;
7751 		re = TAILQ_NEXT(re, entry);
7752 	}
7753 
7754 	view_border(view);
7755 	return err;
7756 }
7757 
7758 static const struct got_error *
7759 browse_ref_tree(struct tog_view **new_view, int begin_y, int begin_x,
7760     struct tog_reflist_entry *re, struct got_repository *repo)
7761 {
7762 	const struct got_error *err = NULL;
7763 	struct got_object_id *commit_id = NULL;
7764 	struct tog_view *tree_view;
7765 
7766 	*new_view = NULL;
7767 
7768 	err = resolve_reflist_entry(&commit_id, re, repo);
7769 	if (err) {
7770 		if (err->code != GOT_ERR_OBJ_TYPE)
7771 			return err;
7772 		else
7773 			return NULL;
7774 	}
7775 
7776 
7777 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
7778 	if (tree_view == NULL) {
7779 		err = got_error_from_errno("view_open");
7780 		goto done;
7781 	}
7782 
7783 	err = open_tree_view(tree_view, commit_id,
7784 	    got_ref_get_name(re->ref), repo);
7785 	if (err)
7786 		goto done;
7787 
7788 	*new_view = tree_view;
7789 done:
7790 	free(commit_id);
7791 	return err;
7792 }
7793 
7794 static const struct got_error *
7795 ref_goto_line(struct tog_view *view, int nlines)
7796 {
7797 	const struct got_error		*err = NULL;
7798 	struct tog_ref_view_state	*s = &view->state.ref;
7799 	int				 g, idx = s->selected_entry->idx;
7800 
7801 	g = view->gline;
7802 	view->gline = 0;
7803 
7804 	if (g == 0)
7805 		g = 1;
7806 	else if (g > s->nrefs)
7807 		g = s->nrefs;
7808 
7809 	if (g >= s->first_displayed_entry->idx + 1 &&
7810 	    g <= s->last_displayed_entry->idx + 1 &&
7811 	    g - s->first_displayed_entry->idx - 1 < nlines) {
7812 		s->selected = g - s->first_displayed_entry->idx - 1;
7813 		return NULL;
7814 	}
7815 
7816 	if (idx + 1 < g) {
7817 		err = ref_scroll_down(view, g - idx - 1);
7818 		if (err)
7819 			return err;
7820 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL &&
7821 		    s->first_displayed_entry->idx + s->selected < g &&
7822 		    s->selected < s->ndisplayed - 1)
7823 			s->selected = g - s->first_displayed_entry->idx - 1;
7824 	} else if (idx + 1 > g)
7825 		ref_scroll_up(s, idx - g + 1);
7826 
7827 	if (g < nlines && s->first_displayed_entry->idx == 0)
7828 		s->selected = g - 1;
7829 
7830 	return NULL;
7831 
7832 }
7833 
7834 static const struct got_error *
7835 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
7836 {
7837 	const struct got_error *err = NULL;
7838 	struct tog_ref_view_state *s = &view->state.ref;
7839 	struct tog_reflist_entry *re;
7840 	int n, nscroll = view->nlines - 1;
7841 
7842 	if (view->gline)
7843 		return ref_goto_line(view, nscroll);
7844 
7845 	switch (ch) {
7846 	case 'i':
7847 		s->show_ids = !s->show_ids;
7848 		view->count = 0;
7849 		break;
7850 	case 'm':
7851 		s->show_date = !s->show_date;
7852 		view->count = 0;
7853 		break;
7854 	case 'o':
7855 		s->sort_by_date = !s->sort_by_date;
7856 		view->count = 0;
7857 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
7858 		    got_ref_cmp_by_commit_timestamp_descending :
7859 		    tog_ref_cmp_by_name, s->repo);
7860 		if (err)
7861 			break;
7862 		got_reflist_object_id_map_free(tog_refs_idmap);
7863 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
7864 		    &tog_refs, s->repo);
7865 		if (err)
7866 			break;
7867 		ref_view_free_refs(s);
7868 		err = ref_view_load_refs(s);
7869 		break;
7870 	case KEY_ENTER:
7871 	case '\r':
7872 		view->count = 0;
7873 		if (!s->selected_entry)
7874 			break;
7875 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
7876 		break;
7877 	case 'T':
7878 		view->count = 0;
7879 		if (!s->selected_entry)
7880 			break;
7881 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
7882 		break;
7883 	case 'g':
7884 	case KEY_HOME:
7885 		s->selected = 0;
7886 		view->count = 0;
7887 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7888 		break;
7889 	case 'G':
7890 	case KEY_END: {
7891 		int eos = view->nlines - 1;
7892 
7893 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
7894 			--eos;  /* border */
7895 		s->selected = 0;
7896 		view->count = 0;
7897 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
7898 		for (n = 0; n < eos; n++) {
7899 			if (re == NULL)
7900 				break;
7901 			s->first_displayed_entry = re;
7902 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7903 		}
7904 		if (n > 0)
7905 			s->selected = n - 1;
7906 		break;
7907 	}
7908 	case 'k':
7909 	case KEY_UP:
7910 	case CTRL('p'):
7911 		if (s->selected > 0) {
7912 			s->selected--;
7913 			break;
7914 		}
7915 		ref_scroll_up(s, 1);
7916 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7917 			view->count = 0;
7918 		break;
7919 	case CTRL('u'):
7920 	case 'u':
7921 		nscroll /= 2;
7922 		/* FALL THROUGH */
7923 	case KEY_PPAGE:
7924 	case CTRL('b'):
7925 	case 'b':
7926 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7927 			s->selected -= MIN(nscroll, s->selected);
7928 		ref_scroll_up(s, MAX(0, nscroll));
7929 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7930 			view->count = 0;
7931 		break;
7932 	case 'j':
7933 	case KEY_DOWN:
7934 	case CTRL('n'):
7935 		if (s->selected < s->ndisplayed - 1) {
7936 			s->selected++;
7937 			break;
7938 		}
7939 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7940 			/* can't scroll any further */
7941 			view->count = 0;
7942 			break;
7943 		}
7944 		ref_scroll_down(view, 1);
7945 		break;
7946 	case CTRL('d'):
7947 	case 'd':
7948 		nscroll /= 2;
7949 		/* FALL THROUGH */
7950 	case KEY_NPAGE:
7951 	case CTRL('f'):
7952 	case 'f':
7953 	case ' ':
7954 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7955 			/* can't scroll any further; move cursor down */
7956 			if (s->selected < s->ndisplayed - 1)
7957 				s->selected += MIN(nscroll,
7958 				    s->ndisplayed - s->selected - 1);
7959 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7960 				s->selected += s->ndisplayed - s->selected - 1;
7961 			view->count = 0;
7962 			break;
7963 		}
7964 		ref_scroll_down(view, nscroll);
7965 		break;
7966 	case CTRL('l'):
7967 		view->count = 0;
7968 		tog_free_refs();
7969 		err = tog_load_refs(s->repo, s->sort_by_date);
7970 		if (err)
7971 			break;
7972 		ref_view_free_refs(s);
7973 		err = ref_view_load_refs(s);
7974 		break;
7975 	case KEY_RESIZE:
7976 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7977 			s->selected = view->nlines - 2;
7978 		break;
7979 	default:
7980 		view->count = 0;
7981 		break;
7982 	}
7983 
7984 	return err;
7985 }
7986 
7987 __dead static void
7988 usage_ref(void)
7989 {
7990 	endwin();
7991 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
7992 	    getprogname());
7993 	exit(1);
7994 }
7995 
7996 static const struct got_error *
7997 cmd_ref(int argc, char *argv[])
7998 {
7999 	const struct got_error *error;
8000 	struct got_repository *repo = NULL;
8001 	struct got_worktree *worktree = NULL;
8002 	char *cwd = NULL, *repo_path = NULL;
8003 	int ch;
8004 	struct tog_view *view;
8005 	int *pack_fds = NULL;
8006 
8007 	while ((ch = getopt(argc, argv, "r:")) != -1) {
8008 		switch (ch) {
8009 		case 'r':
8010 			repo_path = realpath(optarg, NULL);
8011 			if (repo_path == NULL)
8012 				return got_error_from_errno2("realpath",
8013 				    optarg);
8014 			break;
8015 		default:
8016 			usage_ref();
8017 			/* NOTREACHED */
8018 		}
8019 	}
8020 
8021 	argc -= optind;
8022 	argv += optind;
8023 
8024 	if (argc > 1)
8025 		usage_ref();
8026 
8027 	error = got_repo_pack_fds_open(&pack_fds);
8028 	if (error != NULL)
8029 		goto done;
8030 
8031 	if (repo_path == NULL) {
8032 		cwd = getcwd(NULL, 0);
8033 		if (cwd == NULL)
8034 			return got_error_from_errno("getcwd");
8035 		error = got_worktree_open(&worktree, cwd);
8036 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
8037 			goto done;
8038 		if (worktree)
8039 			repo_path =
8040 			    strdup(got_worktree_get_repo_path(worktree));
8041 		else
8042 			repo_path = strdup(cwd);
8043 		if (repo_path == NULL) {
8044 			error = got_error_from_errno("strdup");
8045 			goto done;
8046 		}
8047 	}
8048 
8049 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8050 	if (error != NULL)
8051 		goto done;
8052 
8053 	init_curses();
8054 
8055 	error = apply_unveil(got_repo_get_path(repo), NULL);
8056 	if (error)
8057 		goto done;
8058 
8059 	error = tog_load_refs(repo, 0);
8060 	if (error)
8061 		goto done;
8062 
8063 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
8064 	if (view == NULL) {
8065 		error = got_error_from_errno("view_open");
8066 		goto done;
8067 	}
8068 
8069 	error = open_ref_view(view, repo);
8070 	if (error)
8071 		goto done;
8072 
8073 	if (worktree) {
8074 		/* Release work tree lock. */
8075 		got_worktree_close(worktree);
8076 		worktree = NULL;
8077 	}
8078 	error = view_loop(view);
8079 done:
8080 	free(repo_path);
8081 	free(cwd);
8082 	if (repo) {
8083 		const struct got_error *close_err = got_repo_close(repo);
8084 		if (close_err)
8085 			error = close_err;
8086 	}
8087 	if (pack_fds) {
8088 		const struct got_error *pack_err =
8089 		    got_repo_pack_fds_close(pack_fds);
8090 		if (error == NULL)
8091 			error = pack_err;
8092 	}
8093 	tog_free_refs();
8094 	return error;
8095 }
8096 
8097 static const struct got_error *
8098 view_dispatch_request(struct tog_view **new_view, struct tog_view *view,
8099     enum tog_view_type request, int y, int x)
8100 {
8101 	const struct got_error *err = NULL;
8102 
8103 	*new_view = NULL;
8104 
8105 	switch (request) {
8106 	case TOG_VIEW_DIFF:
8107 		if (view->type == TOG_VIEW_LOG) {
8108 			struct tog_log_view_state *s = &view->state.log;
8109 
8110 			err = open_diff_view_for_commit(new_view, y, x,
8111 			    s->selected_entry->commit, s->selected_entry->id,
8112 			    view, s->repo);
8113 		} else
8114 			return got_error_msg(GOT_ERR_NOT_IMPL,
8115 			    "parent/child view pair not supported");
8116 		break;
8117 	case TOG_VIEW_BLAME:
8118 		if (view->type == TOG_VIEW_TREE) {
8119 			struct tog_tree_view_state *s = &view->state.tree;
8120 
8121 			err = blame_tree_entry(new_view, y, x,
8122 			    s->selected_entry, &s->parents, s->commit_id,
8123 			    s->repo);
8124 		} else
8125 			return got_error_msg(GOT_ERR_NOT_IMPL,
8126 			    "parent/child view pair not supported");
8127 		break;
8128 	case TOG_VIEW_LOG:
8129 		if (view->type == TOG_VIEW_BLAME)
8130 			err = log_annotated_line(new_view, y, x,
8131 			    view->state.blame.repo, view->state.blame.id_to_log);
8132 		else if (view->type == TOG_VIEW_TREE)
8133 			err = log_selected_tree_entry(new_view, y, x,
8134 			    &view->state.tree);
8135 		else if (view->type == TOG_VIEW_REF)
8136 			err = log_ref_entry(new_view, y, x,
8137 			    view->state.ref.selected_entry,
8138 			    view->state.ref.repo);
8139 		else
8140 			return got_error_msg(GOT_ERR_NOT_IMPL,
8141 			    "parent/child view pair not supported");
8142 		break;
8143 	case TOG_VIEW_TREE:
8144 		if (view->type == TOG_VIEW_LOG)
8145 			err = browse_commit_tree(new_view, y, x,
8146 			    view->state.log.selected_entry,
8147 			    view->state.log.in_repo_path,
8148 			    view->state.log.head_ref_name,
8149 			    view->state.log.repo);
8150 		else if (view->type == TOG_VIEW_REF)
8151 			err = browse_ref_tree(new_view, y, x,
8152 			    view->state.ref.selected_entry,
8153 			    view->state.ref.repo);
8154 		else
8155 			return got_error_msg(GOT_ERR_NOT_IMPL,
8156 			    "parent/child view pair not supported");
8157 		break;
8158 	case TOG_VIEW_REF:
8159 		*new_view = view_open(0, 0, y, x, TOG_VIEW_REF);
8160 		if (*new_view == NULL)
8161 			return got_error_from_errno("view_open");
8162 		if (view->type == TOG_VIEW_LOG)
8163 			err = open_ref_view(*new_view, view->state.log.repo);
8164 		else if (view->type == TOG_VIEW_TREE)
8165 			err = open_ref_view(*new_view, view->state.tree.repo);
8166 		else
8167 			err = got_error_msg(GOT_ERR_NOT_IMPL,
8168 			    "parent/child view pair not supported");
8169 		if (err)
8170 			view_close(*new_view);
8171 		break;
8172 	default:
8173 		return got_error_msg(GOT_ERR_NOT_IMPL, "invalid view");
8174 	}
8175 
8176 	return err;
8177 }
8178 
8179 /*
8180  * If view was scrolled down to move the selected line into view when opening a
8181  * horizontal split, scroll back up when closing the split/toggling fullscreen.
8182  */
8183 static void
8184 offset_selection_up(struct tog_view *view)
8185 {
8186 	switch (view->type) {
8187 	case TOG_VIEW_BLAME: {
8188 		struct tog_blame_view_state *s = &view->state.blame;
8189 		if (s->first_displayed_line == 1) {
8190 			s->selected_line = MAX(s->selected_line - view->offset,
8191 			    1);
8192 			break;
8193 		}
8194 		if (s->first_displayed_line > view->offset)
8195 			s->first_displayed_line -= view->offset;
8196 		else
8197 			s->first_displayed_line = 1;
8198 		s->selected_line += view->offset;
8199 		break;
8200 	}
8201 	case TOG_VIEW_LOG:
8202 		log_scroll_up(&view->state.log, view->offset);
8203 		view->state.log.selected += view->offset;
8204 		break;
8205 	case TOG_VIEW_REF:
8206 		ref_scroll_up(&view->state.ref, view->offset);
8207 		view->state.ref.selected += view->offset;
8208 		break;
8209 	case TOG_VIEW_TREE:
8210 		tree_scroll_up(&view->state.tree, view->offset);
8211 		view->state.tree.selected += view->offset;
8212 		break;
8213 	default:
8214 		break;
8215 	}
8216 
8217 	view->offset = 0;
8218 }
8219 
8220 /*
8221  * If the selected line is in the section of screen covered by the bottom split,
8222  * scroll down offset lines to move it into view and index its new position.
8223  */
8224 static const struct got_error *
8225 offset_selection_down(struct tog_view *view)
8226 {
8227 	const struct got_error	*err = NULL;
8228 	const struct got_error	*(*scrolld)(struct tog_view *, int);
8229 	int			*selected = NULL;
8230 	int			 header, offset;
8231 
8232 	switch (view->type) {
8233 	case TOG_VIEW_BLAME: {
8234 		struct tog_blame_view_state *s = &view->state.blame;
8235 		header = 3;
8236 		scrolld = NULL;
8237 		if (s->selected_line > view->nlines - header) {
8238 			offset = abs(view->nlines - s->selected_line - header);
8239 			s->first_displayed_line += offset;
8240 			s->selected_line -= offset;
8241 			view->offset = offset;
8242 		}
8243 		break;
8244 	}
8245 	case TOG_VIEW_LOG: {
8246 		struct tog_log_view_state *s = &view->state.log;
8247 		scrolld = &log_scroll_down;
8248 		header = view_is_parent_view(view) ? 3 : 2;
8249 		selected = &s->selected;
8250 		break;
8251 	}
8252 	case TOG_VIEW_REF: {
8253 		struct tog_ref_view_state *s = &view->state.ref;
8254 		scrolld = &ref_scroll_down;
8255 		header = 3;
8256 		selected = &s->selected;
8257 		break;
8258 	}
8259 	case TOG_VIEW_TREE: {
8260 		struct tog_tree_view_state *s = &view->state.tree;
8261 		scrolld = &tree_scroll_down;
8262 		header = 5;
8263 		selected = &s->selected;
8264 		break;
8265 	}
8266 	default:
8267 		selected = NULL;
8268 		scrolld = NULL;
8269 		header = 0;
8270 		break;
8271 	}
8272 
8273 	if (selected && *selected > view->nlines - header) {
8274 		offset = abs(view->nlines - *selected - header);
8275 		view->offset = offset;
8276 		if (scrolld && offset) {
8277 			err = scrolld(view, offset);
8278 			*selected -= offset;
8279 		}
8280 	}
8281 
8282 	return err;
8283 }
8284 
8285 static void
8286 list_commands(FILE *fp)
8287 {
8288 	size_t i;
8289 
8290 	fprintf(fp, "commands:");
8291 	for (i = 0; i < nitems(tog_commands); i++) {
8292 		const struct tog_cmd *cmd = &tog_commands[i];
8293 		fprintf(fp, " %s", cmd->name);
8294 	}
8295 	fputc('\n', fp);
8296 }
8297 
8298 __dead static void
8299 usage(int hflag, int status)
8300 {
8301 	FILE *fp = (status == 0) ? stdout : stderr;
8302 
8303 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
8304 	    getprogname());
8305 	if (hflag) {
8306 		fprintf(fp, "lazy usage: %s path\n", getprogname());
8307 		list_commands(fp);
8308 	}
8309 	exit(status);
8310 }
8311 
8312 static char **
8313 make_argv(int argc, ...)
8314 {
8315 	va_list ap;
8316 	char **argv;
8317 	int i;
8318 
8319 	va_start(ap, argc);
8320 
8321 	argv = calloc(argc, sizeof(char *));
8322 	if (argv == NULL)
8323 		err(1, "calloc");
8324 	for (i = 0; i < argc; i++) {
8325 		argv[i] = strdup(va_arg(ap, char *));
8326 		if (argv[i] == NULL)
8327 			err(1, "strdup");
8328 	}
8329 
8330 	va_end(ap);
8331 	return argv;
8332 }
8333 
8334 /*
8335  * Try to convert 'tog path' into a 'tog log path' command.
8336  * The user could simply have mistyped the command rather than knowingly
8337  * provided a path. So check whether argv[0] can in fact be resolved
8338  * to a path in the HEAD commit and print a special error if not.
8339  * This hack is for mpi@ <3
8340  */
8341 static const struct got_error *
8342 tog_log_with_path(int argc, char *argv[])
8343 {
8344 	const struct got_error *error = NULL, *close_err;
8345 	const struct tog_cmd *cmd = NULL;
8346 	struct got_repository *repo = NULL;
8347 	struct got_worktree *worktree = NULL;
8348 	struct got_object_id *commit_id = NULL, *id = NULL;
8349 	struct got_commit_object *commit = NULL;
8350 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
8351 	char *commit_id_str = NULL, **cmd_argv = NULL;
8352 	int *pack_fds = NULL;
8353 
8354 	cwd = getcwd(NULL, 0);
8355 	if (cwd == NULL)
8356 		return got_error_from_errno("getcwd");
8357 
8358 	error = got_repo_pack_fds_open(&pack_fds);
8359 	if (error != NULL)
8360 		goto done;
8361 
8362 	error = got_worktree_open(&worktree, cwd);
8363 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
8364 		goto done;
8365 
8366 	if (worktree)
8367 		repo_path = strdup(got_worktree_get_repo_path(worktree));
8368 	else
8369 		repo_path = strdup(cwd);
8370 	if (repo_path == NULL) {
8371 		error = got_error_from_errno("strdup");
8372 		goto done;
8373 	}
8374 
8375 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8376 	if (error != NULL)
8377 		goto done;
8378 
8379 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
8380 	    repo, worktree);
8381 	if (error)
8382 		goto done;
8383 
8384 	error = tog_load_refs(repo, 0);
8385 	if (error)
8386 		goto done;
8387 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
8388 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
8389 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
8390 	if (error)
8391 		goto done;
8392 
8393 	if (worktree) {
8394 		got_worktree_close(worktree);
8395 		worktree = NULL;
8396 	}
8397 
8398 	error = got_object_open_as_commit(&commit, repo, commit_id);
8399 	if (error)
8400 		goto done;
8401 
8402 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
8403 	if (error) {
8404 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
8405 			goto done;
8406 		fprintf(stderr, "%s: '%s' is no known command or path\n",
8407 		    getprogname(), argv[0]);
8408 		usage(1, 1);
8409 		/* not reached */
8410 	}
8411 
8412 	error = got_object_id_str(&commit_id_str, commit_id);
8413 	if (error)
8414 		goto done;
8415 
8416 	cmd = &tog_commands[0]; /* log */
8417 	argc = 4;
8418 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
8419 	error = cmd->cmd_main(argc, cmd_argv);
8420 done:
8421 	if (repo) {
8422 		close_err = got_repo_close(repo);
8423 		if (error == NULL)
8424 			error = close_err;
8425 	}
8426 	if (commit)
8427 		got_object_commit_close(commit);
8428 	if (worktree)
8429 		got_worktree_close(worktree);
8430 	if (pack_fds) {
8431 		const struct got_error *pack_err =
8432 		    got_repo_pack_fds_close(pack_fds);
8433 		if (error == NULL)
8434 			error = pack_err;
8435 	}
8436 	free(id);
8437 	free(commit_id_str);
8438 	free(commit_id);
8439 	free(cwd);
8440 	free(repo_path);
8441 	free(in_repo_path);
8442 	if (cmd_argv) {
8443 		int i;
8444 		for (i = 0; i < argc; i++)
8445 			free(cmd_argv[i]);
8446 		free(cmd_argv);
8447 	}
8448 	tog_free_refs();
8449 	return error;
8450 }
8451 
8452 int
8453 main(int argc, char *argv[])
8454 {
8455 	const struct got_error *error = NULL;
8456 	const struct tog_cmd *cmd = NULL;
8457 	int ch, hflag = 0, Vflag = 0;
8458 	char **cmd_argv = NULL;
8459 	static const struct option longopts[] = {
8460 	    { "version", no_argument, NULL, 'V' },
8461 	    { NULL, 0, NULL, 0}
8462 	};
8463 	char *diff_algo_str = NULL;
8464 
8465 	setlocale(LC_CTYPE, "");
8466 
8467 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
8468 		switch (ch) {
8469 		case 'h':
8470 			hflag = 1;
8471 			break;
8472 		case 'V':
8473 			Vflag = 1;
8474 			break;
8475 		default:
8476 			usage(hflag, 1);
8477 			/* NOTREACHED */
8478 		}
8479 	}
8480 
8481 	argc -= optind;
8482 	argv += optind;
8483 	optind = 1;
8484 	optreset = 1;
8485 
8486 	if (Vflag) {
8487 		got_version_print_str();
8488 		return 0;
8489 	}
8490 
8491 #ifndef PROFILE
8492 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
8493 	    NULL) == -1)
8494 		err(1, "pledge");
8495 #endif
8496 
8497 	if (argc == 0) {
8498 		if (hflag)
8499 			usage(hflag, 0);
8500 		/* Build an argument vector which runs a default command. */
8501 		cmd = &tog_commands[0];
8502 		argc = 1;
8503 		cmd_argv = make_argv(argc, cmd->name);
8504 	} else {
8505 		size_t i;
8506 
8507 		/* Did the user specify a command? */
8508 		for (i = 0; i < nitems(tog_commands); i++) {
8509 			if (strncmp(tog_commands[i].name, argv[0],
8510 			    strlen(argv[0])) == 0) {
8511 				cmd = &tog_commands[i];
8512 				break;
8513 			}
8514 		}
8515 	}
8516 
8517 	diff_algo_str = getenv("TOG_DIFF_ALGORITHM");
8518 	if (diff_algo_str) {
8519 		if (strcasecmp(diff_algo_str, "patience") == 0)
8520 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
8521 		if (strcasecmp(diff_algo_str, "myers") == 0)
8522 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
8523 	}
8524 
8525 	if (cmd == NULL) {
8526 		if (argc != 1)
8527 			usage(0, 1);
8528 		/* No command specified; try log with a path */
8529 		error = tog_log_with_path(argc, argv);
8530 	} else {
8531 		if (hflag)
8532 			cmd->cmd_usage();
8533 		else
8534 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
8535 	}
8536 
8537 	endwin();
8538 	putchar('\n');
8539 	if (cmd_argv) {
8540 		int i;
8541 		for (i = 0; i < argc; i++)
8542 			free(cmd_argv[i]);
8543 		free(cmd_argv);
8544 	}
8545 
8546 	if (error && error->code != GOT_ERR_CANCELLED)
8547 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
8548 	return 0;
8549 }