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 
3169 	if (s->thread_args.log_complete &&
3170 	    s->selected_entry->idx >= s->commits.ncommits - 1)
3171 		return NULL;
3172 
3173 	if (!page) {
3174 		int eos = view->nlines - 2;
3175 
3176 		if (view_is_hsplit_top(view))
3177 			--eos;  /* border consumes the last line */
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 		if (s->last_displayed_entry->idx == s->commits.ncommits - 1)
3184 			s->selected += MIN(s->last_displayed_entry->idx -
3185 			    s->selected_entry->idx, page + 1);
3186 		else
3187 			err = log_scroll_down(view, MIN(page,
3188 			    s->commits.ncommits - s->selected_entry->idx - 1));
3189 		s->selected = MIN(view->nlines - 2, s->commits.ncommits - 1);
3190 	} else {
3191 		if (s->last_displayed_entry->idx == s->commits.ncommits - 1 &&
3192 		    s->thread_args.log_complete)
3193 			s->selected += MIN(page,
3194 			    s->commits.ncommits - s->selected_entry->idx - 1);
3195 		else
3196 			err = log_scroll_down(view, page);
3197 	}
3198 	if (err)
3199 		return err;
3200 
3201 	/*
3202 	 * We might necessarily overshoot in horizontal
3203 	 * splits; if so, select the last displayed commit.
3204 	 */
3205 	s->selected = MIN(s->selected,
3206 	    s->last_displayed_entry->idx - s->first_displayed_entry->idx);
3207 
3208 	select_commit(s);
3209 
3210 	if (s->thread_args.log_complete &&
3211 	    s->selected_entry->idx == s->commits.ncommits - 1)
3212 		view->count = 0;
3213 
3214 	return NULL;
3215 }
3216 
3217 static void
3218 view_get_split(struct tog_view *view, int *y, int *x)
3219 {
3220 	*x = 0;
3221 	*y = 0;
3222 
3223 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
3224 		if (view->child && view->child->resized_y)
3225 			*y = view->child->resized_y;
3226 		else if (view->resized_y)
3227 			*y = view->resized_y;
3228 		else
3229 			*y = view_split_begin_y(view->lines);
3230 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
3231 		if (view->child && view->child->resized_x)
3232 			*x = view->child->resized_x;
3233 		else if (view->resized_x)
3234 			*x = view->resized_x;
3235 		else
3236 			*x = view_split_begin_x(view->begin_x);
3237 	}
3238 }
3239 
3240 /* Split view horizontally at y and offset view->state->selected line. */
3241 static const struct got_error *
3242 view_init_hsplit(struct tog_view *view, int y)
3243 {
3244 	const struct got_error *err = NULL;
3245 
3246 	view->nlines = y;
3247 	view->ncols = COLS;
3248 	err = view_resize(view);
3249 	if (err)
3250 		return err;
3251 
3252 	err = offset_selection_down(view);
3253 
3254 	return err;
3255 }
3256 
3257 static const struct got_error *
3258 log_goto_line(struct tog_view *view, int nlines)
3259 {
3260 	const struct got_error		*err = NULL;
3261 	struct tog_log_view_state	*s = &view->state.log;
3262 	int				 g, idx = s->selected_entry->idx;
3263 
3264 	g = view->gline;
3265 	view->gline = 0;
3266 
3267 	if (g >= s->first_displayed_entry->idx + 1 &&
3268 	    g <= s->last_displayed_entry->idx + 1 &&
3269 	    g - s->first_displayed_entry->idx - 1 < nlines) {
3270 		s->selected = g - s->first_displayed_entry->idx - 1;
3271 		select_commit(s);
3272 		return NULL;
3273 	}
3274 
3275 	if (idx + 1 < g) {
3276 		err = log_move_cursor_down(view, g - idx - 1);
3277 		if (!err && g > s->selected_entry->idx + 1)
3278 			err = log_move_cursor_down(view,
3279 			    g - s->first_displayed_entry->idx - 1);
3280 		if (err)
3281 			return err;
3282 	} else if (idx + 1 > g)
3283 		log_move_cursor_up(view, idx - g + 1, 0);
3284 
3285 	if (g < nlines && s->first_displayed_entry->idx == 0)
3286 		s->selected = g - 1;
3287 
3288 	select_commit(s);
3289 	return NULL;
3290 
3291 }
3292 
3293 static const struct got_error *
3294 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
3295 {
3296 	const struct got_error *err = NULL;
3297 	struct tog_log_view_state *s = &view->state.log;
3298 	struct commit_queue_entry *entry;
3299 	int eos, n, nscroll;
3300 
3301 	if (s->thread_args.load_all) {
3302 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
3303 			s->thread_args.load_all = 0;
3304 		else if (s->thread_args.log_complete) {
3305 			err = log_move_cursor_down(view, s->commits.ncommits);
3306 			s->thread_args.load_all = 0;
3307 		}
3308 		return err;
3309 	}
3310 
3311 	eos = nscroll = view->nlines - 1;
3312 	if (view_is_hsplit_top(view))
3313 		--eos;  /* border */
3314 
3315 	if (view->gline)
3316 		return log_goto_line(view, eos);
3317 
3318 	switch (ch) {
3319 	case 'q':
3320 		s->quit = 1;
3321 		break;
3322 	case '0':
3323 		view->x = 0;
3324 		break;
3325 	case '$':
3326 		view->x = MAX(view->maxx - view->ncols / 2, 0);
3327 		view->count = 0;
3328 		break;
3329 	case KEY_RIGHT:
3330 	case 'l':
3331 		if (view->x + view->ncols / 2 < view->maxx)
3332 			view->x += 2;  /* move two columns right */
3333 		else
3334 			view->count = 0;
3335 		break;
3336 	case KEY_LEFT:
3337 	case 'h':
3338 		view->x -= MIN(view->x, 2);  /* move two columns back */
3339 		if (view->x <= 0)
3340 			view->count = 0;
3341 		break;
3342 	case 'k':
3343 	case KEY_UP:
3344 	case '<':
3345 	case ',':
3346 	case CTRL('p'):
3347 		log_move_cursor_up(view, 0, 0);
3348 		break;
3349 	case 'g':
3350 	case KEY_HOME:
3351 		log_move_cursor_up(view, 0, 1);
3352 		view->count = 0;
3353 		break;
3354 	case CTRL('u'):
3355 	case 'u':
3356 		nscroll /= 2;
3357 		/* FALL THROUGH */
3358 	case KEY_PPAGE:
3359 	case CTRL('b'):
3360 	case 'b':
3361 		log_move_cursor_up(view, nscroll, 0);
3362 		break;
3363 	case 'j':
3364 	case KEY_DOWN:
3365 	case '>':
3366 	case '.':
3367 	case CTRL('n'):
3368 		err = log_move_cursor_down(view, 0);
3369 		break;
3370 	case '@':
3371 		s->use_committer = !s->use_committer;
3372 		break;
3373 	case 'G':
3374 	case KEY_END: {
3375 		/* We don't know yet how many commits, so we're forced to
3376 		 * traverse them all. */
3377 		view->count = 0;
3378 		if (!s->thread_args.log_complete) {
3379 			s->thread_args.load_all = 1;
3380 			return trigger_log_thread(view, 0);
3381 		}
3382 
3383 		s->selected = 0;
3384 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
3385 		for (n = 0; n < eos; n++) {
3386 			if (entry == NULL)
3387 				break;
3388 			s->first_displayed_entry = entry;
3389 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3390 		}
3391 		if (n > 0)
3392 			s->selected = n - 1;
3393 		select_commit(s);
3394 		break;
3395 	}
3396 	case CTRL('d'):
3397 	case 'd':
3398 		nscroll /= 2;
3399 		/* FALL THROUGH */
3400 	case KEY_NPAGE:
3401 	case CTRL('f'):
3402 	case 'f':
3403 	case ' ':
3404 		err = log_move_cursor_down(view, nscroll);
3405 		break;
3406 	case KEY_RESIZE:
3407 		if (s->selected > view->nlines - 2)
3408 			s->selected = view->nlines - 2;
3409 		if (s->selected > s->commits.ncommits - 1)
3410 			s->selected = s->commits.ncommits - 1;
3411 		select_commit(s);
3412 		if (s->commits.ncommits < view->nlines - 1 &&
3413 		    !s->thread_args.log_complete) {
3414 			s->thread_args.commits_needed += (view->nlines - 1) -
3415 			    s->commits.ncommits;
3416 			err = trigger_log_thread(view, 1);
3417 		}
3418 		break;
3419 	case KEY_ENTER:
3420 	case '\r':
3421 		view->count = 0;
3422 		if (s->selected_entry == NULL)
3423 			break;
3424 		err = view_request_new(new_view, view, TOG_VIEW_DIFF);
3425 		break;
3426 	case 'T':
3427 		view->count = 0;
3428 		if (s->selected_entry == NULL)
3429 			break;
3430 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
3431 		break;
3432 	case KEY_BACKSPACE:
3433 	case CTRL('l'):
3434 	case 'B':
3435 		view->count = 0;
3436 		if (ch == KEY_BACKSPACE &&
3437 		    got_path_is_root_dir(s->in_repo_path))
3438 			break;
3439 		err = stop_log_thread(s);
3440 		if (err)
3441 			return err;
3442 		if (ch == KEY_BACKSPACE) {
3443 			char *parent_path;
3444 			err = got_path_dirname(&parent_path, s->in_repo_path);
3445 			if (err)
3446 				return err;
3447 			free(s->in_repo_path);
3448 			s->in_repo_path = parent_path;
3449 			s->thread_args.in_repo_path = s->in_repo_path;
3450 		} else if (ch == CTRL('l')) {
3451 			struct got_object_id *start_id;
3452 			err = got_repo_match_object_id(&start_id, NULL,
3453 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
3454 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
3455 			if (err)
3456 				return err;
3457 			free(s->start_id);
3458 			s->start_id = start_id;
3459 			s->thread_args.start_id = s->start_id;
3460 		} else /* 'B' */
3461 			s->log_branches = !s->log_branches;
3462 
3463 		if (s->thread_args.pack_fds == NULL) {
3464 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3465 			if (err)
3466 				return err;
3467 		}
3468 		err = got_repo_open(&s->thread_args.repo,
3469 		    got_repo_get_path(s->repo), NULL,
3470 		    s->thread_args.pack_fds);
3471 		if (err)
3472 			return err;
3473 		tog_free_refs();
3474 		err = tog_load_refs(s->repo, 0);
3475 		if (err)
3476 			return err;
3477 		err = got_commit_graph_open(&s->thread_args.graph,
3478 		    s->in_repo_path, !s->log_branches);
3479 		if (err)
3480 			return err;
3481 		err = got_commit_graph_iter_start(s->thread_args.graph,
3482 		    s->start_id, s->repo, NULL, NULL);
3483 		if (err)
3484 			return err;
3485 		free_commits(&s->commits);
3486 		s->first_displayed_entry = NULL;
3487 		s->last_displayed_entry = NULL;
3488 		s->selected_entry = NULL;
3489 		s->selected = 0;
3490 		s->thread_args.log_complete = 0;
3491 		s->quit = 0;
3492 		s->thread_args.commits_needed = view->lines;
3493 		s->matched_entry = NULL;
3494 		s->search_entry = NULL;
3495 		view->offset = 0;
3496 		break;
3497 	case 'R':
3498 		view->count = 0;
3499 		err = view_request_new(new_view, view, TOG_VIEW_REF);
3500 		break;
3501 	default:
3502 		view->count = 0;
3503 		break;
3504 	}
3505 
3506 	return err;
3507 }
3508 
3509 static const struct got_error *
3510 apply_unveil(const char *repo_path, const char *worktree_path)
3511 {
3512 	const struct got_error *error;
3513 
3514 #ifdef PROFILE
3515 	if (unveil("gmon.out", "rwc") != 0)
3516 		return got_error_from_errno2("unveil", "gmon.out");
3517 #endif
3518 	if (repo_path && unveil(repo_path, "r") != 0)
3519 		return got_error_from_errno2("unveil", repo_path);
3520 
3521 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
3522 		return got_error_from_errno2("unveil", worktree_path);
3523 
3524 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
3525 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
3526 
3527 	error = got_privsep_unveil_exec_helpers();
3528 	if (error != NULL)
3529 		return error;
3530 
3531 	if (unveil(NULL, NULL) != 0)
3532 		return got_error_from_errno("unveil");
3533 
3534 	return NULL;
3535 }
3536 
3537 static void
3538 init_curses(void)
3539 {
3540 	/*
3541 	 * Override default signal handlers before starting ncurses.
3542 	 * This should prevent ncurses from installing its own
3543 	 * broken cleanup() signal handler.
3544 	 */
3545 	signal(SIGWINCH, tog_sigwinch);
3546 	signal(SIGPIPE, tog_sigpipe);
3547 	signal(SIGCONT, tog_sigcont);
3548 	signal(SIGINT, tog_sigint);
3549 	signal(SIGTERM, tog_sigterm);
3550 
3551 	initscr();
3552 	cbreak();
3553 	halfdelay(1); /* Do fast refresh while initial view is loading. */
3554 	noecho();
3555 	nonl();
3556 	intrflush(stdscr, FALSE);
3557 	keypad(stdscr, TRUE);
3558 	curs_set(0);
3559 	if (getenv("TOG_COLORS") != NULL) {
3560 		start_color();
3561 		use_default_colors();
3562 	}
3563 }
3564 
3565 static const struct got_error *
3566 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
3567     struct got_repository *repo, struct got_worktree *worktree)
3568 {
3569 	const struct got_error *err = NULL;
3570 
3571 	if (argc == 0) {
3572 		*in_repo_path = strdup("/");
3573 		if (*in_repo_path == NULL)
3574 			return got_error_from_errno("strdup");
3575 		return NULL;
3576 	}
3577 
3578 	if (worktree) {
3579 		const char *prefix = got_worktree_get_path_prefix(worktree);
3580 		char *p;
3581 
3582 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3583 		if (err)
3584 			return err;
3585 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3586 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3587 		    p) == -1) {
3588 			err = got_error_from_errno("asprintf");
3589 			*in_repo_path = NULL;
3590 		}
3591 		free(p);
3592 	} else
3593 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3594 
3595 	return err;
3596 }
3597 
3598 static const struct got_error *
3599 cmd_log(int argc, char *argv[])
3600 {
3601 	const struct got_error *error;
3602 	struct got_repository *repo = NULL;
3603 	struct got_worktree *worktree = NULL;
3604 	struct got_object_id *start_id = NULL;
3605 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3606 	char *start_commit = NULL, *label = NULL;
3607 	struct got_reference *ref = NULL;
3608 	const char *head_ref_name = NULL;
3609 	int ch, log_branches = 0;
3610 	struct tog_view *view;
3611 	int *pack_fds = NULL;
3612 
3613 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3614 		switch (ch) {
3615 		case 'b':
3616 			log_branches = 1;
3617 			break;
3618 		case 'c':
3619 			start_commit = optarg;
3620 			break;
3621 		case 'r':
3622 			repo_path = realpath(optarg, NULL);
3623 			if (repo_path == NULL)
3624 				return got_error_from_errno2("realpath",
3625 				    optarg);
3626 			break;
3627 		default:
3628 			usage_log();
3629 			/* NOTREACHED */
3630 		}
3631 	}
3632 
3633 	argc -= optind;
3634 	argv += optind;
3635 
3636 	if (argc > 1)
3637 		usage_log();
3638 
3639 	error = got_repo_pack_fds_open(&pack_fds);
3640 	if (error != NULL)
3641 		goto done;
3642 
3643 	if (repo_path == NULL) {
3644 		cwd = getcwd(NULL, 0);
3645 		if (cwd == NULL)
3646 			return got_error_from_errno("getcwd");
3647 		error = got_worktree_open(&worktree, cwd);
3648 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3649 			goto done;
3650 		if (worktree)
3651 			repo_path =
3652 			    strdup(got_worktree_get_repo_path(worktree));
3653 		else
3654 			repo_path = strdup(cwd);
3655 		if (repo_path == NULL) {
3656 			error = got_error_from_errno("strdup");
3657 			goto done;
3658 		}
3659 	}
3660 
3661 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3662 	if (error != NULL)
3663 		goto done;
3664 
3665 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3666 	    repo, worktree);
3667 	if (error)
3668 		goto done;
3669 
3670 	init_curses();
3671 
3672 	error = apply_unveil(got_repo_get_path(repo),
3673 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3674 	if (error)
3675 		goto done;
3676 
3677 	/* already loaded by tog_log_with_path()? */
3678 	if (TAILQ_EMPTY(&tog_refs)) {
3679 		error = tog_load_refs(repo, 0);
3680 		if (error)
3681 			goto done;
3682 	}
3683 
3684 	if (start_commit == NULL) {
3685 		error = got_repo_match_object_id(&start_id, &label,
3686 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3687 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3688 		if (error)
3689 			goto done;
3690 		head_ref_name = label;
3691 	} else {
3692 		error = got_ref_open(&ref, repo, start_commit, 0);
3693 		if (error == NULL)
3694 			head_ref_name = got_ref_get_name(ref);
3695 		else if (error->code != GOT_ERR_NOT_REF)
3696 			goto done;
3697 		error = got_repo_match_object_id(&start_id, NULL,
3698 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3699 		if (error)
3700 			goto done;
3701 	}
3702 
3703 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3704 	if (view == NULL) {
3705 		error = got_error_from_errno("view_open");
3706 		goto done;
3707 	}
3708 	error = open_log_view(view, start_id, repo, head_ref_name,
3709 	    in_repo_path, log_branches);
3710 	if (error)
3711 		goto done;
3712 	if (worktree) {
3713 		/* Release work tree lock. */
3714 		got_worktree_close(worktree);
3715 		worktree = NULL;
3716 	}
3717 	error = view_loop(view);
3718 done:
3719 	free(in_repo_path);
3720 	free(repo_path);
3721 	free(cwd);
3722 	free(start_id);
3723 	free(label);
3724 	if (ref)
3725 		got_ref_close(ref);
3726 	if (repo) {
3727 		const struct got_error *close_err = got_repo_close(repo);
3728 		if (error == NULL)
3729 			error = close_err;
3730 	}
3731 	if (worktree)
3732 		got_worktree_close(worktree);
3733 	if (pack_fds) {
3734 		const struct got_error *pack_err =
3735 		    got_repo_pack_fds_close(pack_fds);
3736 		if (error == NULL)
3737 			error = pack_err;
3738 	}
3739 	tog_free_refs();
3740 	return error;
3741 }
3742 
3743 __dead static void
3744 usage_diff(void)
3745 {
3746 	endwin();
3747 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3748 	    "[-w] object1 object2\n", getprogname());
3749 	exit(1);
3750 }
3751 
3752 static int
3753 match_line(const char *line, regex_t *regex, size_t nmatch,
3754     regmatch_t *regmatch)
3755 {
3756 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3757 }
3758 
3759 static struct tog_color *
3760 match_color(struct tog_colors *colors, const char *line)
3761 {
3762 	struct tog_color *tc = NULL;
3763 
3764 	STAILQ_FOREACH(tc, colors, entry) {
3765 		if (match_line(line, &tc->regex, 0, NULL))
3766 			return tc;
3767 	}
3768 
3769 	return NULL;
3770 }
3771 
3772 static const struct got_error *
3773 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3774     WINDOW *window, int skipcol, regmatch_t *regmatch)
3775 {
3776 	const struct got_error *err = NULL;
3777 	char *exstr = NULL;
3778 	wchar_t *wline = NULL;
3779 	int rme, rms, n, width, scrollx;
3780 	int width0 = 0, width1 = 0, width2 = 0;
3781 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3782 
3783 	*wtotal = 0;
3784 
3785 	rms = regmatch->rm_so;
3786 	rme = regmatch->rm_eo;
3787 
3788 	err = expand_tab(&exstr, line);
3789 	if (err)
3790 		return err;
3791 
3792 	/* Split the line into 3 segments, according to match offsets. */
3793 	seg0 = strndup(exstr, rms);
3794 	if (seg0 == NULL) {
3795 		err = got_error_from_errno("strndup");
3796 		goto done;
3797 	}
3798 	seg1 = strndup(exstr + rms, rme - rms);
3799 	if (seg1 == NULL) {
3800 		err = got_error_from_errno("strndup");
3801 		goto done;
3802 	}
3803 	seg2 = strdup(exstr + rme);
3804 	if (seg2 == NULL) {
3805 		err = got_error_from_errno("strndup");
3806 		goto done;
3807 	}
3808 
3809 	/* draw up to matched token if we haven't scrolled past it */
3810 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3811 	    col_tab_align, 1);
3812 	if (err)
3813 		goto done;
3814 	n = MAX(width0 - skipcol, 0);
3815 	if (n) {
3816 		free(wline);
3817 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3818 		    wlimit, col_tab_align, 1);
3819 		if (err)
3820 			goto done;
3821 		waddwstr(window, &wline[scrollx]);
3822 		wlimit -= width;
3823 		*wtotal += width;
3824 	}
3825 
3826 	if (wlimit > 0) {
3827 		int i = 0, w = 0;
3828 		size_t wlen;
3829 
3830 		free(wline);
3831 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3832 		    col_tab_align, 1);
3833 		if (err)
3834 			goto done;
3835 		wlen = wcslen(wline);
3836 		while (i < wlen) {
3837 			width = wcwidth(wline[i]);
3838 			if (width == -1) {
3839 				/* should not happen, tabs are expanded */
3840 				err = got_error(GOT_ERR_RANGE);
3841 				goto done;
3842 			}
3843 			if (width0 + w + width > skipcol)
3844 				break;
3845 			w += width;
3846 			i++;
3847 		}
3848 		/* draw (visible part of) matched token (if scrolled into it) */
3849 		if (width1 - w > 0) {
3850 			wattron(window, A_STANDOUT);
3851 			waddwstr(window, &wline[i]);
3852 			wattroff(window, A_STANDOUT);
3853 			wlimit -= (width1 - w);
3854 			*wtotal += (width1 - w);
3855 		}
3856 	}
3857 
3858 	if (wlimit > 0) {  /* draw rest of line */
3859 		free(wline);
3860 		if (skipcol > width0 + width1) {
3861 			err = format_line(&wline, &width2, &scrollx, seg2,
3862 			    skipcol - (width0 + width1), wlimit,
3863 			    col_tab_align, 1);
3864 			if (err)
3865 				goto done;
3866 			waddwstr(window, &wline[scrollx]);
3867 		} else {
3868 			err = format_line(&wline, &width2, NULL, seg2, 0,
3869 			    wlimit, col_tab_align, 1);
3870 			if (err)
3871 				goto done;
3872 			waddwstr(window, wline);
3873 		}
3874 		*wtotal += width2;
3875 	}
3876 done:
3877 	free(wline);
3878 	free(exstr);
3879 	free(seg0);
3880 	free(seg1);
3881 	free(seg2);
3882 	return err;
3883 }
3884 
3885 static int
3886 gotoline(struct tog_view *view, int *lineno, int *nprinted)
3887 {
3888 	FILE	*f = NULL;
3889 	int	*eof, *first, *selected;
3890 
3891 	if (view->type == TOG_VIEW_DIFF) {
3892 		struct tog_diff_view_state *s = &view->state.diff;
3893 
3894 		first = &s->first_displayed_line;
3895 		selected = first;
3896 		eof = &s->eof;
3897 		f = s->f;
3898 	} else if (view->type == TOG_VIEW_BLAME) {
3899 		struct tog_blame_view_state *s = &view->state.blame;
3900 
3901 		first = &s->first_displayed_line;
3902 		selected = &s->selected_line;
3903 		eof = &s->eof;
3904 		f = s->blame.f;
3905 	} else
3906 		return 0;
3907 
3908 	/* Center gline in the middle of the page like vi(1). */
3909 	if (*lineno < view->gline - (view->nlines - 3) / 2)
3910 		return 0;
3911 	if (*first != 1 && (*lineno > view->gline - (view->nlines - 3) / 2)) {
3912 		rewind(f);
3913 		*eof = 0;
3914 		*first = 1;
3915 		*lineno = 0;
3916 		*nprinted = 0;
3917 		return 0;
3918 	}
3919 
3920 	*selected = view->gline <= (view->nlines - 3) / 2 ?
3921 		view->gline : (view->nlines - 3) / 2 + 1;
3922 	view->gline = 0;
3923 
3924 	return 1;
3925 }
3926 
3927 static const struct got_error *
3928 draw_file(struct tog_view *view, const char *header)
3929 {
3930 	struct tog_diff_view_state *s = &view->state.diff;
3931 	regmatch_t *regmatch = &view->regmatch;
3932 	const struct got_error *err;
3933 	int nprinted = 0;
3934 	char *line;
3935 	size_t linesize = 0;
3936 	ssize_t linelen;
3937 	wchar_t *wline;
3938 	int width;
3939 	int max_lines = view->nlines;
3940 	int nlines = s->nlines;
3941 	off_t line_offset;
3942 
3943 	s->lineno = s->first_displayed_line - 1;
3944 	line_offset = s->lines[s->first_displayed_line - 1].offset;
3945 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3946 		return got_error_from_errno("fseek");
3947 
3948 	werase(view->window);
3949 
3950 	if (view->gline > s->nlines - 1)
3951 		view->gline = s->nlines - 1;
3952 
3953 	if (header) {
3954 		int ln = view->gline ? view->gline <= (view->nlines - 3) / 2 ?
3955 		    1 : view->gline - (view->nlines - 3) / 2 :
3956 		    s->lineno + s->selected_line;
3957 
3958 		if (asprintf(&line, "[%d/%d] %s", ln, nlines, header) == -1)
3959 			return got_error_from_errno("asprintf");
3960 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3961 		    0, 0);
3962 		free(line);
3963 		if (err)
3964 			return err;
3965 
3966 		if (view_needs_focus_indication(view))
3967 			wstandout(view->window);
3968 		waddwstr(view->window, wline);
3969 		free(wline);
3970 		wline = NULL;
3971 		if (view_needs_focus_indication(view))
3972 			wstandend(view->window);
3973 		if (width <= view->ncols - 1)
3974 			waddch(view->window, '\n');
3975 
3976 		if (max_lines <= 1)
3977 			return NULL;
3978 		max_lines--;
3979 	}
3980 
3981 	s->eof = 0;
3982 	view->maxx = 0;
3983 	line = NULL;
3984 	while (max_lines > 0 && nprinted < max_lines) {
3985 		enum got_diff_line_type linetype;
3986 		attr_t attr = 0;
3987 
3988 		linelen = getline(&line, &linesize, s->f);
3989 		if (linelen == -1) {
3990 			if (feof(s->f)) {
3991 				s->eof = 1;
3992 				break;
3993 			}
3994 			free(line);
3995 			return got_ferror(s->f, GOT_ERR_IO);
3996 		}
3997 
3998 		if (++s->lineno < s->first_displayed_line)
3999 			continue;
4000 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
4001 			continue;
4002 		if (s->lineno == view->hiline)
4003 			attr = A_STANDOUT;
4004 
4005 		/* Set view->maxx based on full line length. */
4006 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
4007 		    view->x ? 1 : 0);
4008 		if (err) {
4009 			free(line);
4010 			return err;
4011 		}
4012 		view->maxx = MAX(view->maxx, width);
4013 		free(wline);
4014 		wline = NULL;
4015 
4016 		linetype = s->lines[s->lineno].type;
4017 		if (linetype > GOT_DIFF_LINE_LOGMSG &&
4018 		    linetype < GOT_DIFF_LINE_CONTEXT)
4019 			attr |= COLOR_PAIR(linetype);
4020 		if (attr)
4021 			wattron(view->window, attr);
4022 		if (s->first_displayed_line + nprinted == s->matched_line &&
4023 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4024 			err = add_matched_line(&width, line, view->ncols, 0,
4025 			    view->window, view->x, regmatch);
4026 			if (err) {
4027 				free(line);
4028 				return err;
4029 			}
4030 		} else {
4031 			int skip;
4032 			err = format_line(&wline, &width, &skip, line,
4033 			    view->x, view->ncols, 0, view->x ? 1 : 0);
4034 			if (err) {
4035 				free(line);
4036 				return err;
4037 			}
4038 			waddwstr(view->window, &wline[skip]);
4039 			free(wline);
4040 			wline = NULL;
4041 		}
4042 		if (s->lineno == view->hiline) {
4043 			/* highlight full gline length */
4044 			while (width++ < view->ncols)
4045 				waddch(view->window, ' ');
4046 		} else {
4047 			if (width <= view->ncols - 1)
4048 				waddch(view->window, '\n');
4049 		}
4050 		if (attr)
4051 			wattroff(view->window, attr);
4052 		if (++nprinted == 1)
4053 			s->first_displayed_line = s->lineno;
4054 	}
4055 	free(line);
4056 	if (nprinted >= 1)
4057 		s->last_displayed_line = s->first_displayed_line +
4058 		    (nprinted - 1);
4059 	else
4060 		s->last_displayed_line = s->first_displayed_line;
4061 
4062 	view_border(view);
4063 
4064 	if (s->eof) {
4065 		while (nprinted < view->nlines) {
4066 			waddch(view->window, '\n');
4067 			nprinted++;
4068 		}
4069 
4070 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
4071 		    view->ncols, 0, 0);
4072 		if (err) {
4073 			return err;
4074 		}
4075 
4076 		wstandout(view->window);
4077 		waddwstr(view->window, wline);
4078 		free(wline);
4079 		wline = NULL;
4080 		wstandend(view->window);
4081 	}
4082 
4083 	return NULL;
4084 }
4085 
4086 static char *
4087 get_datestr(time_t *time, char *datebuf)
4088 {
4089 	struct tm mytm, *tm;
4090 	char *p, *s;
4091 
4092 	tm = gmtime_r(time, &mytm);
4093 	if (tm == NULL)
4094 		return NULL;
4095 	s = asctime_r(tm, datebuf);
4096 	if (s == NULL)
4097 		return NULL;
4098 	p = strchr(s, '\n');
4099 	if (p)
4100 		*p = '\0';
4101 	return s;
4102 }
4103 
4104 static const struct got_error *
4105 get_changed_paths(struct got_pathlist_head *paths,
4106     struct got_commit_object *commit, struct got_repository *repo)
4107 {
4108 	const struct got_error *err = NULL;
4109 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
4110 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
4111 	struct got_object_qid *qid;
4112 
4113 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
4114 	if (qid != NULL) {
4115 		struct got_commit_object *pcommit;
4116 		err = got_object_open_as_commit(&pcommit, repo,
4117 		    &qid->id);
4118 		if (err)
4119 			return err;
4120 
4121 		tree_id1 = got_object_id_dup(
4122 		    got_object_commit_get_tree_id(pcommit));
4123 		if (tree_id1 == NULL) {
4124 			got_object_commit_close(pcommit);
4125 			return got_error_from_errno("got_object_id_dup");
4126 		}
4127 		got_object_commit_close(pcommit);
4128 
4129 	}
4130 
4131 	if (tree_id1) {
4132 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
4133 		if (err)
4134 			goto done;
4135 	}
4136 
4137 	tree_id2 = got_object_commit_get_tree_id(commit);
4138 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
4139 	if (err)
4140 		goto done;
4141 
4142 	err = got_diff_tree(tree1, tree2, NULL, NULL, -1, -1, "", "", repo,
4143 	    got_diff_tree_collect_changed_paths, paths, 0);
4144 done:
4145 	if (tree1)
4146 		got_object_tree_close(tree1);
4147 	if (tree2)
4148 		got_object_tree_close(tree2);
4149 	free(tree_id1);
4150 	return err;
4151 }
4152 
4153 static const struct got_error *
4154 add_line_metadata(struct got_diff_line **lines, size_t *nlines,
4155     off_t off, uint8_t type)
4156 {
4157 	struct got_diff_line *p;
4158 
4159 	p = reallocarray(*lines, *nlines + 1, sizeof(**lines));
4160 	if (p == NULL)
4161 		return got_error_from_errno("reallocarray");
4162 	*lines = p;
4163 	(*lines)[*nlines].offset = off;
4164 	(*lines)[*nlines].type = type;
4165 	(*nlines)++;
4166 
4167 	return NULL;
4168 }
4169 
4170 static const struct got_error *
4171 write_commit_info(struct got_diff_line **lines, size_t *nlines,
4172     struct got_object_id *commit_id, struct got_reflist_head *refs,
4173     struct got_repository *repo, FILE *outfile)
4174 {
4175 	const struct got_error *err = NULL;
4176 	char datebuf[26], *datestr;
4177 	struct got_commit_object *commit;
4178 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
4179 	time_t committer_time;
4180 	const char *author, *committer;
4181 	char *refs_str = NULL;
4182 	struct got_pathlist_head changed_paths;
4183 	struct got_pathlist_entry *pe;
4184 	off_t outoff = 0;
4185 	int n;
4186 
4187 	TAILQ_INIT(&changed_paths);
4188 
4189 	if (refs) {
4190 		err = build_refs_str(&refs_str, refs, commit_id, repo);
4191 		if (err)
4192 			return err;
4193 	}
4194 
4195 	err = got_object_open_as_commit(&commit, repo, commit_id);
4196 	if (err)
4197 		return err;
4198 
4199 	err = got_object_id_str(&id_str, commit_id);
4200 	if (err) {
4201 		err = got_error_from_errno("got_object_id_str");
4202 		goto done;
4203 	}
4204 
4205 	err = add_line_metadata(lines, nlines, 0, GOT_DIFF_LINE_NONE);
4206 	if (err)
4207 		goto done;
4208 
4209 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
4210 	    refs_str ? refs_str : "", refs_str ? ")" : "");
4211 	if (n < 0) {
4212 		err = got_error_from_errno("fprintf");
4213 		goto done;
4214 	}
4215 	outoff += n;
4216 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_META);
4217 	if (err)
4218 		goto done;
4219 
4220 	n = fprintf(outfile, "from: %s\n",
4221 	    got_object_commit_get_author(commit));
4222 	if (n < 0) {
4223 		err = got_error_from_errno("fprintf");
4224 		goto done;
4225 	}
4226 	outoff += n;
4227 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_AUTHOR);
4228 	if (err)
4229 		goto done;
4230 
4231 	committer_time = got_object_commit_get_committer_time(commit);
4232 	datestr = get_datestr(&committer_time, datebuf);
4233 	if (datestr) {
4234 		n = fprintf(outfile, "date: %s UTC\n", datestr);
4235 		if (n < 0) {
4236 			err = got_error_from_errno("fprintf");
4237 			goto done;
4238 		}
4239 		outoff += n;
4240 		err = add_line_metadata(lines, nlines, outoff,
4241 		    GOT_DIFF_LINE_DATE);
4242 		if (err)
4243 			goto done;
4244 	}
4245 	author = got_object_commit_get_author(commit);
4246 	committer = got_object_commit_get_committer(commit);
4247 	if (strcmp(author, committer) != 0) {
4248 		n = fprintf(outfile, "via: %s\n", committer);
4249 		if (n < 0) {
4250 			err = got_error_from_errno("fprintf");
4251 			goto done;
4252 		}
4253 		outoff += n;
4254 		err = add_line_metadata(lines, nlines, outoff,
4255 		    GOT_DIFF_LINE_AUTHOR);
4256 		if (err)
4257 			goto done;
4258 	}
4259 	if (got_object_commit_get_nparents(commit) > 1) {
4260 		const struct got_object_id_queue *parent_ids;
4261 		struct got_object_qid *qid;
4262 		int pn = 1;
4263 		parent_ids = got_object_commit_get_parent_ids(commit);
4264 		STAILQ_FOREACH(qid, parent_ids, entry) {
4265 			err = got_object_id_str(&id_str, &qid->id);
4266 			if (err)
4267 				goto done;
4268 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
4269 			if (n < 0) {
4270 				err = got_error_from_errno("fprintf");
4271 				goto done;
4272 			}
4273 			outoff += n;
4274 			err = add_line_metadata(lines, nlines, outoff,
4275 			    GOT_DIFF_LINE_META);
4276 			if (err)
4277 				goto done;
4278 			free(id_str);
4279 			id_str = NULL;
4280 		}
4281 	}
4282 
4283 	err = got_object_commit_get_logmsg(&logmsg, commit);
4284 	if (err)
4285 		goto done;
4286 	s = logmsg;
4287 	while ((line = strsep(&s, "\n")) != NULL) {
4288 		n = fprintf(outfile, "%s\n", line);
4289 		if (n < 0) {
4290 			err = got_error_from_errno("fprintf");
4291 			goto done;
4292 		}
4293 		outoff += n;
4294 		err = add_line_metadata(lines, nlines, outoff,
4295 		    GOT_DIFF_LINE_LOGMSG);
4296 		if (err)
4297 			goto done;
4298 	}
4299 
4300 	err = get_changed_paths(&changed_paths, commit, repo);
4301 	if (err)
4302 		goto done;
4303 	TAILQ_FOREACH(pe, &changed_paths, entry) {
4304 		struct got_diff_changed_path *cp = pe->data;
4305 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
4306 		if (n < 0) {
4307 			err = got_error_from_errno("fprintf");
4308 			goto done;
4309 		}
4310 		outoff += n;
4311 		err = add_line_metadata(lines, nlines, outoff,
4312 		    GOT_DIFF_LINE_CHANGES);
4313 		if (err)
4314 			goto done;
4315 		free((char *)pe->path);
4316 		free(pe->data);
4317 	}
4318 
4319 	fputc('\n', outfile);
4320 	outoff++;
4321 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
4322 done:
4323 	got_pathlist_free(&changed_paths);
4324 	free(id_str);
4325 	free(logmsg);
4326 	free(refs_str);
4327 	got_object_commit_close(commit);
4328 	if (err) {
4329 		free(*lines);
4330 		*lines = NULL;
4331 		*nlines = 0;
4332 	}
4333 	return err;
4334 }
4335 
4336 static const struct got_error *
4337 create_diff(struct tog_diff_view_state *s)
4338 {
4339 	const struct got_error *err = NULL;
4340 	FILE *f = NULL;
4341 	int obj_type;
4342 
4343 	free(s->lines);
4344 	s->lines = malloc(sizeof(*s->lines));
4345 	if (s->lines == NULL)
4346 		return got_error_from_errno("malloc");
4347 	s->nlines = 0;
4348 
4349 	f = got_opentemp();
4350 	if (f == NULL) {
4351 		err = got_error_from_errno("got_opentemp");
4352 		goto done;
4353 	}
4354 	if (s->f && fclose(s->f) == EOF) {
4355 		err = got_error_from_errno("fclose");
4356 		goto done;
4357 	}
4358 	s->f = f;
4359 
4360 	if (s->id1)
4361 		err = got_object_get_type(&obj_type, s->repo, s->id1);
4362 	else
4363 		err = got_object_get_type(&obj_type, s->repo, s->id2);
4364 	if (err)
4365 		goto done;
4366 
4367 	switch (obj_type) {
4368 	case GOT_OBJ_TYPE_BLOB:
4369 		err = got_diff_objects_as_blobs(&s->lines, &s->nlines,
4370 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
4371 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
4372 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
4373 		break;
4374 	case GOT_OBJ_TYPE_TREE:
4375 		err = got_diff_objects_as_trees(&s->lines, &s->nlines,
4376 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
4377 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4378 		    s->force_text_diff, s->repo, s->f);
4379 		break;
4380 	case GOT_OBJ_TYPE_COMMIT: {
4381 		const struct got_object_id_queue *parent_ids;
4382 		struct got_object_qid *pid;
4383 		struct got_commit_object *commit2;
4384 		struct got_reflist_head *refs;
4385 
4386 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
4387 		if (err)
4388 			goto done;
4389 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
4390 		/* Show commit info if we're diffing to a parent/root commit. */
4391 		if (s->id1 == NULL) {
4392 			err = write_commit_info(&s->lines, &s->nlines, s->id2,
4393 			    refs, s->repo, s->f);
4394 			if (err)
4395 				goto done;
4396 		} else {
4397 			parent_ids = got_object_commit_get_parent_ids(commit2);
4398 			STAILQ_FOREACH(pid, parent_ids, entry) {
4399 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
4400 					err = write_commit_info(&s->lines,
4401 					    &s->nlines, s->id2, refs, s->repo,
4402 					    s->f);
4403 					if (err)
4404 						goto done;
4405 					break;
4406 				}
4407 			}
4408 		}
4409 		got_object_commit_close(commit2);
4410 
4411 		err = got_diff_objects_as_commits(&s->lines, &s->nlines,
4412 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
4413 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4414 		    s->force_text_diff, s->repo, s->f);
4415 		break;
4416 	}
4417 	default:
4418 		err = got_error(GOT_ERR_OBJ_TYPE);
4419 		break;
4420 	}
4421 done:
4422 	if (s->f && fflush(s->f) != 0 && err == NULL)
4423 		err = got_error_from_errno("fflush");
4424 	return err;
4425 }
4426 
4427 static void
4428 diff_view_indicate_progress(struct tog_view *view)
4429 {
4430 	mvwaddstr(view->window, 0, 0, "diffing...");
4431 	update_panels();
4432 	doupdate();
4433 }
4434 
4435 static const struct got_error *
4436 search_start_diff_view(struct tog_view *view)
4437 {
4438 	struct tog_diff_view_state *s = &view->state.diff;
4439 
4440 	s->matched_line = 0;
4441 	return NULL;
4442 }
4443 
4444 static const struct got_error *
4445 search_next_diff_view(struct tog_view *view)
4446 {
4447 	struct tog_diff_view_state *s = &view->state.diff;
4448 	const struct got_error *err = NULL;
4449 	int lineno;
4450 	char *line = NULL;
4451 	size_t linesize = 0;
4452 	ssize_t linelen;
4453 
4454 	if (!view->searching) {
4455 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4456 		return NULL;
4457 	}
4458 
4459 	if (s->matched_line) {
4460 		if (view->searching == TOG_SEARCH_FORWARD)
4461 			lineno = s->matched_line + 1;
4462 		else
4463 			lineno = s->matched_line - 1;
4464 	} else
4465 		lineno = s->first_displayed_line;
4466 
4467 	while (1) {
4468 		off_t offset;
4469 
4470 		if (lineno <= 0 || lineno > s->nlines) {
4471 			if (s->matched_line == 0) {
4472 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4473 				break;
4474 			}
4475 
4476 			if (view->searching == TOG_SEARCH_FORWARD)
4477 				lineno = 1;
4478 			else
4479 				lineno = s->nlines;
4480 		}
4481 
4482 		offset = s->lines[lineno - 1].offset;
4483 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
4484 			free(line);
4485 			return got_error_from_errno("fseeko");
4486 		}
4487 		linelen = getline(&line, &linesize, s->f);
4488 		if (linelen != -1) {
4489 			char *exstr;
4490 			err = expand_tab(&exstr, line);
4491 			if (err)
4492 				break;
4493 			if (match_line(exstr, &view->regex, 1,
4494 			    &view->regmatch)) {
4495 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4496 				s->matched_line = lineno;
4497 				free(exstr);
4498 				break;
4499 			}
4500 			free(exstr);
4501 		}
4502 		if (view->searching == TOG_SEARCH_FORWARD)
4503 			lineno++;
4504 		else
4505 			lineno--;
4506 	}
4507 	free(line);
4508 
4509 	if (s->matched_line) {
4510 		s->first_displayed_line = s->matched_line;
4511 		s->selected_line = 1;
4512 	}
4513 
4514 	return err;
4515 }
4516 
4517 static const struct got_error *
4518 close_diff_view(struct tog_view *view)
4519 {
4520 	const struct got_error *err = NULL;
4521 	struct tog_diff_view_state *s = &view->state.diff;
4522 
4523 	free(s->id1);
4524 	s->id1 = NULL;
4525 	free(s->id2);
4526 	s->id2 = NULL;
4527 	if (s->f && fclose(s->f) == EOF)
4528 		err = got_error_from_errno("fclose");
4529 	s->f = NULL;
4530 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
4531 		err = got_error_from_errno("fclose");
4532 	s->f1 = NULL;
4533 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
4534 		err = got_error_from_errno("fclose");
4535 	s->f2 = NULL;
4536 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
4537 		err = got_error_from_errno("close");
4538 	s->fd1 = -1;
4539 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
4540 		err = got_error_from_errno("close");
4541 	s->fd2 = -1;
4542 	free(s->lines);
4543 	s->lines = NULL;
4544 	s->nlines = 0;
4545 	return err;
4546 }
4547 
4548 static const struct got_error *
4549 open_diff_view(struct tog_view *view, struct got_object_id *id1,
4550     struct got_object_id *id2, const char *label1, const char *label2,
4551     int diff_context, int ignore_whitespace, int force_text_diff,
4552     struct tog_view *parent_view, struct got_repository *repo)
4553 {
4554 	const struct got_error *err;
4555 	struct tog_diff_view_state *s = &view->state.diff;
4556 
4557 	memset(s, 0, sizeof(*s));
4558 	s->fd1 = -1;
4559 	s->fd2 = -1;
4560 
4561 	if (id1 != NULL && id2 != NULL) {
4562 	    int type1, type2;
4563 	    err = got_object_get_type(&type1, repo, id1);
4564 	    if (err)
4565 		return err;
4566 	    err = got_object_get_type(&type2, repo, id2);
4567 	    if (err)
4568 		return err;
4569 
4570 	    if (type1 != type2)
4571 		return got_error(GOT_ERR_OBJ_TYPE);
4572 	}
4573 	s->first_displayed_line = 1;
4574 	s->last_displayed_line = view->nlines;
4575 	s->selected_line = 1;
4576 	s->repo = repo;
4577 	s->id1 = id1;
4578 	s->id2 = id2;
4579 	s->label1 = label1;
4580 	s->label2 = label2;
4581 
4582 	if (id1) {
4583 		s->id1 = got_object_id_dup(id1);
4584 		if (s->id1 == NULL)
4585 			return got_error_from_errno("got_object_id_dup");
4586 	} else
4587 		s->id1 = NULL;
4588 
4589 	s->id2 = got_object_id_dup(id2);
4590 	if (s->id2 == NULL) {
4591 		err = got_error_from_errno("got_object_id_dup");
4592 		goto done;
4593 	}
4594 
4595 	s->f1 = got_opentemp();
4596 	if (s->f1 == NULL) {
4597 		err = got_error_from_errno("got_opentemp");
4598 		goto done;
4599 	}
4600 
4601 	s->f2 = got_opentemp();
4602 	if (s->f2 == NULL) {
4603 		err = got_error_from_errno("got_opentemp");
4604 		goto done;
4605 	}
4606 
4607 	s->fd1 = got_opentempfd();
4608 	if (s->fd1 == -1) {
4609 		err = got_error_from_errno("got_opentempfd");
4610 		goto done;
4611 	}
4612 
4613 	s->fd2 = got_opentempfd();
4614 	if (s->fd2 == -1) {
4615 		err = got_error_from_errno("got_opentempfd");
4616 		goto done;
4617 	}
4618 
4619 	s->first_displayed_line = 1;
4620 	s->last_displayed_line = view->nlines;
4621 	s->diff_context = diff_context;
4622 	s->ignore_whitespace = ignore_whitespace;
4623 	s->force_text_diff = force_text_diff;
4624 	s->parent_view = parent_view;
4625 	s->repo = repo;
4626 
4627 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4628 		int rc;
4629 
4630 		rc = init_pair(GOT_DIFF_LINE_MINUS,
4631 		    get_color_value("TOG_COLOR_DIFF_MINUS"), -1);
4632 		if (rc != ERR)
4633 			rc = init_pair(GOT_DIFF_LINE_PLUS,
4634 			    get_color_value("TOG_COLOR_DIFF_PLUS"), -1);
4635 		if (rc != ERR)
4636 			rc = init_pair(GOT_DIFF_LINE_HUNK,
4637 			    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"), -1);
4638 		if (rc != ERR)
4639 			rc = init_pair(GOT_DIFF_LINE_META,
4640 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4641 		if (rc != ERR)
4642 			rc = init_pair(GOT_DIFF_LINE_CHANGES,
4643 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4644 		if (rc != ERR)
4645 			rc = init_pair(GOT_DIFF_LINE_BLOB_MIN,
4646 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4647 		if (rc != ERR)
4648 			rc = init_pair(GOT_DIFF_LINE_BLOB_PLUS,
4649 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
4650 		if (rc != ERR)
4651 			rc = init_pair(GOT_DIFF_LINE_AUTHOR,
4652 			    get_color_value("TOG_COLOR_AUTHOR"), -1);
4653 		if (rc != ERR)
4654 			rc = init_pair(GOT_DIFF_LINE_DATE,
4655 			    get_color_value("TOG_COLOR_DATE"), -1);
4656 		if (rc == ERR) {
4657 			err = got_error(GOT_ERR_RANGE);
4658 			goto done;
4659 		}
4660 	}
4661 
4662 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
4663 	    view_is_splitscreen(view))
4664 		show_log_view(parent_view); /* draw border */
4665 	diff_view_indicate_progress(view);
4666 
4667 	err = create_diff(s);
4668 
4669 	view->show = show_diff_view;
4670 	view->input = input_diff_view;
4671 	view->reset = reset_diff_view;
4672 	view->close = close_diff_view;
4673 	view->search_start = search_start_diff_view;
4674 	view->search_next = search_next_diff_view;
4675 done:
4676 	if (err)
4677 		close_diff_view(view);
4678 	return err;
4679 }
4680 
4681 static const struct got_error *
4682 show_diff_view(struct tog_view *view)
4683 {
4684 	const struct got_error *err;
4685 	struct tog_diff_view_state *s = &view->state.diff;
4686 	char *id_str1 = NULL, *id_str2, *header;
4687 	const char *label1, *label2;
4688 
4689 	if (s->id1) {
4690 		err = got_object_id_str(&id_str1, s->id1);
4691 		if (err)
4692 			return err;
4693 		label1 = s->label1 ? : id_str1;
4694 	} else
4695 		label1 = "/dev/null";
4696 
4697 	err = got_object_id_str(&id_str2, s->id2);
4698 	if (err)
4699 		return err;
4700 	label2 = s->label2 ? : id_str2;
4701 
4702 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4703 		err = got_error_from_errno("asprintf");
4704 		free(id_str1);
4705 		free(id_str2);
4706 		return err;
4707 	}
4708 	free(id_str1);
4709 	free(id_str2);
4710 
4711 	err = draw_file(view, header);
4712 	free(header);
4713 	return err;
4714 }
4715 
4716 static const struct got_error *
4717 set_selected_commit(struct tog_diff_view_state *s,
4718     struct commit_queue_entry *entry)
4719 {
4720 	const struct got_error *err;
4721 	const struct got_object_id_queue *parent_ids;
4722 	struct got_commit_object *selected_commit;
4723 	struct got_object_qid *pid;
4724 
4725 	free(s->id2);
4726 	s->id2 = got_object_id_dup(entry->id);
4727 	if (s->id2 == NULL)
4728 		return got_error_from_errno("got_object_id_dup");
4729 
4730 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4731 	if (err)
4732 		return err;
4733 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4734 	free(s->id1);
4735 	pid = STAILQ_FIRST(parent_ids);
4736 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4737 	got_object_commit_close(selected_commit);
4738 	return NULL;
4739 }
4740 
4741 static const struct got_error *
4742 reset_diff_view(struct tog_view *view)
4743 {
4744 	struct tog_diff_view_state *s = &view->state.diff;
4745 
4746 	view->count = 0;
4747 	wclear(view->window);
4748 	s->first_displayed_line = 1;
4749 	s->last_displayed_line = view->nlines;
4750 	s->matched_line = 0;
4751 	diff_view_indicate_progress(view);
4752 	return create_diff(s);
4753 }
4754 
4755 static void
4756 diff_prev_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4757 {
4758 	int start, i;
4759 
4760 	i = start = s->first_displayed_line - 1;
4761 
4762 	while (s->lines[i].type != type) {
4763 		if (i == 0)
4764 			i = s->nlines - 1;
4765 		if (--i == start)
4766 			return; /* do nothing, requested type not in file */
4767 	}
4768 
4769 	s->selected_line = 1;
4770 	s->first_displayed_line = i;
4771 }
4772 
4773 static void
4774 diff_next_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
4775 {
4776 	int start, i;
4777 
4778 	i = start = s->first_displayed_line + 1;
4779 
4780 	while (s->lines[i].type != type) {
4781 		if (i == s->nlines - 1)
4782 			i = 0;
4783 		if (++i == start)
4784 			return; /* do nothing, requested type not in file */
4785 	}
4786 
4787 	s->selected_line = 1;
4788 	s->first_displayed_line = i;
4789 }
4790 
4791 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
4792     int, int, int);
4793 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
4794     int, int);
4795 
4796 static const struct got_error *
4797 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4798 {
4799 	const struct got_error *err = NULL;
4800 	struct tog_diff_view_state *s = &view->state.diff;
4801 	struct tog_log_view_state *ls;
4802 	struct commit_queue_entry *old_selected_entry;
4803 	char *line = NULL;
4804 	size_t linesize = 0;
4805 	ssize_t linelen;
4806 	int i, nscroll = view->nlines - 1, up = 0;
4807 
4808 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
4809 
4810 	switch (ch) {
4811 	case '0':
4812 		view->x = 0;
4813 		break;
4814 	case '$':
4815 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4816 		view->count = 0;
4817 		break;
4818 	case KEY_RIGHT:
4819 	case 'l':
4820 		if (view->x + view->ncols / 3 < view->maxx)
4821 			view->x += 2;  /* move two columns right */
4822 		else
4823 			view->count = 0;
4824 		break;
4825 	case KEY_LEFT:
4826 	case 'h':
4827 		view->x -= MIN(view->x, 2);  /* move two columns back */
4828 		if (view->x <= 0)
4829 			view->count = 0;
4830 		break;
4831 	case 'a':
4832 	case 'w':
4833 		if (ch == 'a')
4834 			s->force_text_diff = !s->force_text_diff;
4835 		if (ch == 'w')
4836 			s->ignore_whitespace = !s->ignore_whitespace;
4837 		err = reset_diff_view(view);
4838 		break;
4839 	case 'g':
4840 	case KEY_HOME:
4841 		s->first_displayed_line = 1;
4842 		view->count = 0;
4843 		break;
4844 	case 'G':
4845 	case KEY_END:
4846 		view->count = 0;
4847 		if (s->eof)
4848 			break;
4849 
4850 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4851 		s->eof = 1;
4852 		break;
4853 	case 'k':
4854 	case KEY_UP:
4855 	case CTRL('p'):
4856 		if (s->first_displayed_line > 1)
4857 			s->first_displayed_line--;
4858 		else
4859 			view->count = 0;
4860 		break;
4861 	case CTRL('u'):
4862 	case 'u':
4863 		nscroll /= 2;
4864 		/* FALL THROUGH */
4865 	case KEY_PPAGE:
4866 	case CTRL('b'):
4867 	case 'b':
4868 		if (s->first_displayed_line == 1) {
4869 			view->count = 0;
4870 			break;
4871 		}
4872 		i = 0;
4873 		while (i++ < nscroll && s->first_displayed_line > 1)
4874 			s->first_displayed_line--;
4875 		break;
4876 	case 'j':
4877 	case KEY_DOWN:
4878 	case CTRL('n'):
4879 		if (!s->eof)
4880 			s->first_displayed_line++;
4881 		else
4882 			view->count = 0;
4883 		break;
4884 	case CTRL('d'):
4885 	case 'd':
4886 		nscroll /= 2;
4887 		/* FALL THROUGH */
4888 	case KEY_NPAGE:
4889 	case CTRL('f'):
4890 	case 'f':
4891 	case ' ':
4892 		if (s->eof) {
4893 			view->count = 0;
4894 			break;
4895 		}
4896 		i = 0;
4897 		while (!s->eof && i++ < nscroll) {
4898 			linelen = getline(&line, &linesize, s->f);
4899 			s->first_displayed_line++;
4900 			if (linelen == -1) {
4901 				if (feof(s->f)) {
4902 					s->eof = 1;
4903 				} else
4904 					err = got_ferror(s->f, GOT_ERR_IO);
4905 				break;
4906 			}
4907 		}
4908 		free(line);
4909 		break;
4910 	case '(':
4911 		diff_prev_index(s, GOT_DIFF_LINE_BLOB_MIN);
4912 		break;
4913 	case ')':
4914 		diff_next_index(s, GOT_DIFF_LINE_BLOB_MIN);
4915 		break;
4916 	case '{':
4917 		diff_prev_index(s, GOT_DIFF_LINE_HUNK);
4918 		break;
4919 	case '}':
4920 		diff_next_index(s, GOT_DIFF_LINE_HUNK);
4921 		break;
4922 	case '[':
4923 		if (s->diff_context > 0) {
4924 			s->diff_context--;
4925 			s->matched_line = 0;
4926 			diff_view_indicate_progress(view);
4927 			err = create_diff(s);
4928 			if (s->first_displayed_line + view->nlines - 1 >
4929 			    s->nlines) {
4930 				s->first_displayed_line = 1;
4931 				s->last_displayed_line = view->nlines;
4932 			}
4933 		} else
4934 			view->count = 0;
4935 		break;
4936 	case ']':
4937 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4938 			s->diff_context++;
4939 			s->matched_line = 0;
4940 			diff_view_indicate_progress(view);
4941 			err = create_diff(s);
4942 		} else
4943 			view->count = 0;
4944 		break;
4945 	case '<':
4946 	case ',':
4947 	case 'K':
4948 		up = 1;
4949 		/* FALL THROUGH */
4950 	case '>':
4951 	case '.':
4952 	case 'J':
4953 		if (s->parent_view == NULL) {
4954 			view->count = 0;
4955 			break;
4956 		}
4957 		s->parent_view->count = view->count;
4958 
4959 		if (s->parent_view->type == TOG_VIEW_LOG) {
4960 			ls = &s->parent_view->state.log;
4961 			old_selected_entry = ls->selected_entry;
4962 
4963 			err = input_log_view(NULL, s->parent_view,
4964 			    up ? KEY_UP : KEY_DOWN);
4965 			if (err)
4966 				break;
4967 			view->count = s->parent_view->count;
4968 
4969 			if (old_selected_entry == ls->selected_entry)
4970 				break;
4971 
4972 			err = set_selected_commit(s, ls->selected_entry);
4973 			if (err)
4974 				break;
4975 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
4976 			struct tog_blame_view_state *bs;
4977 			struct got_object_id *id, *prev_id;
4978 
4979 			bs = &s->parent_view->state.blame;
4980 			prev_id = get_annotation_for_line(bs->blame.lines,
4981 			    bs->blame.nlines, bs->last_diffed_line);
4982 
4983 			err = input_blame_view(&view, s->parent_view,
4984 			    up ? KEY_UP : KEY_DOWN);
4985 			if (err)
4986 				break;
4987 			view->count = s->parent_view->count;
4988 
4989 			if (prev_id == NULL)
4990 				break;
4991 			id = get_selected_commit_id(bs->blame.lines,
4992 			    bs->blame.nlines, bs->first_displayed_line,
4993 			    bs->selected_line);
4994 			if (id == NULL)
4995 				break;
4996 
4997 			if (!got_object_id_cmp(prev_id, id))
4998 				break;
4999 
5000 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
5001 			if (err)
5002 				break;
5003 		}
5004 		s->first_displayed_line = 1;
5005 		s->last_displayed_line = view->nlines;
5006 		s->matched_line = 0;
5007 		view->x = 0;
5008 
5009 		diff_view_indicate_progress(view);
5010 		err = create_diff(s);
5011 		break;
5012 	default:
5013 		view->count = 0;
5014 		break;
5015 	}
5016 
5017 	return err;
5018 }
5019 
5020 static const struct got_error *
5021 cmd_diff(int argc, char *argv[])
5022 {
5023 	const struct got_error *error = NULL;
5024 	struct got_repository *repo = NULL;
5025 	struct got_worktree *worktree = NULL;
5026 	struct got_object_id *id1 = NULL, *id2 = NULL;
5027 	char *repo_path = NULL, *cwd = NULL;
5028 	char *id_str1 = NULL, *id_str2 = NULL;
5029 	char *label1 = NULL, *label2 = NULL;
5030 	int diff_context = 3, ignore_whitespace = 0;
5031 	int ch, force_text_diff = 0;
5032 	const char *errstr;
5033 	struct tog_view *view;
5034 	int *pack_fds = NULL;
5035 
5036 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
5037 		switch (ch) {
5038 		case 'a':
5039 			force_text_diff = 1;
5040 			break;
5041 		case 'C':
5042 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
5043 			    &errstr);
5044 			if (errstr != NULL)
5045 				errx(1, "number of context lines is %s: %s",
5046 				    errstr, errstr);
5047 			break;
5048 		case 'r':
5049 			repo_path = realpath(optarg, NULL);
5050 			if (repo_path == NULL)
5051 				return got_error_from_errno2("realpath",
5052 				    optarg);
5053 			got_path_strip_trailing_slashes(repo_path);
5054 			break;
5055 		case 'w':
5056 			ignore_whitespace = 1;
5057 			break;
5058 		default:
5059 			usage_diff();
5060 			/* NOTREACHED */
5061 		}
5062 	}
5063 
5064 	argc -= optind;
5065 	argv += optind;
5066 
5067 	if (argc == 0) {
5068 		usage_diff(); /* TODO show local worktree changes */
5069 	} else if (argc == 2) {
5070 		id_str1 = argv[0];
5071 		id_str2 = argv[1];
5072 	} else
5073 		usage_diff();
5074 
5075 	error = got_repo_pack_fds_open(&pack_fds);
5076 	if (error)
5077 		goto done;
5078 
5079 	if (repo_path == NULL) {
5080 		cwd = getcwd(NULL, 0);
5081 		if (cwd == NULL)
5082 			return got_error_from_errno("getcwd");
5083 		error = got_worktree_open(&worktree, cwd);
5084 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5085 			goto done;
5086 		if (worktree)
5087 			repo_path =
5088 			    strdup(got_worktree_get_repo_path(worktree));
5089 		else
5090 			repo_path = strdup(cwd);
5091 		if (repo_path == NULL) {
5092 			error = got_error_from_errno("strdup");
5093 			goto done;
5094 		}
5095 	}
5096 
5097 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5098 	if (error)
5099 		goto done;
5100 
5101 	init_curses();
5102 
5103 	error = apply_unveil(got_repo_get_path(repo), NULL);
5104 	if (error)
5105 		goto done;
5106 
5107 	error = tog_load_refs(repo, 0);
5108 	if (error)
5109 		goto done;
5110 
5111 	error = got_repo_match_object_id(&id1, &label1, id_str1,
5112 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5113 	if (error)
5114 		goto done;
5115 
5116 	error = got_repo_match_object_id(&id2, &label2, id_str2,
5117 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5118 	if (error)
5119 		goto done;
5120 
5121 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
5122 	if (view == NULL) {
5123 		error = got_error_from_errno("view_open");
5124 		goto done;
5125 	}
5126 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
5127 	    ignore_whitespace, force_text_diff, NULL,  repo);
5128 	if (error)
5129 		goto done;
5130 	error = view_loop(view);
5131 done:
5132 	free(label1);
5133 	free(label2);
5134 	free(repo_path);
5135 	free(cwd);
5136 	if (repo) {
5137 		const struct got_error *close_err = got_repo_close(repo);
5138 		if (error == NULL)
5139 			error = close_err;
5140 	}
5141 	if (worktree)
5142 		got_worktree_close(worktree);
5143 	if (pack_fds) {
5144 		const struct got_error *pack_err =
5145 		    got_repo_pack_fds_close(pack_fds);
5146 		if (error == NULL)
5147 			error = pack_err;
5148 	}
5149 	tog_free_refs();
5150 	return error;
5151 }
5152 
5153 __dead static void
5154 usage_blame(void)
5155 {
5156 	endwin();
5157 	fprintf(stderr,
5158 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
5159 	    getprogname());
5160 	exit(1);
5161 }
5162 
5163 struct tog_blame_line {
5164 	int annotated;
5165 	struct got_object_id *id;
5166 };
5167 
5168 static const struct got_error *
5169 draw_blame(struct tog_view *view)
5170 {
5171 	struct tog_blame_view_state *s = &view->state.blame;
5172 	struct tog_blame *blame = &s->blame;
5173 	regmatch_t *regmatch = &view->regmatch;
5174 	const struct got_error *err;
5175 	int lineno = 0, nprinted = 0;
5176 	char *line = NULL;
5177 	size_t linesize = 0;
5178 	ssize_t linelen;
5179 	wchar_t *wline;
5180 	int width;
5181 	struct tog_blame_line *blame_line;
5182 	struct got_object_id *prev_id = NULL;
5183 	char *id_str;
5184 	struct tog_color *tc;
5185 
5186 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
5187 	if (err)
5188 		return err;
5189 
5190 	rewind(blame->f);
5191 	werase(view->window);
5192 
5193 	if (asprintf(&line, "commit %s", id_str) == -1) {
5194 		err = got_error_from_errno("asprintf");
5195 		free(id_str);
5196 		return err;
5197 	}
5198 
5199 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5200 	free(line);
5201 	line = NULL;
5202 	if (err)
5203 		return err;
5204 	if (view_needs_focus_indication(view))
5205 		wstandout(view->window);
5206 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5207 	if (tc)
5208 		wattr_on(view->window,
5209 		    COLOR_PAIR(tc->colorpair), NULL);
5210 	waddwstr(view->window, wline);
5211 	if (tc)
5212 		wattr_off(view->window,
5213 		    COLOR_PAIR(tc->colorpair), NULL);
5214 	if (view_needs_focus_indication(view))
5215 		wstandend(view->window);
5216 	free(wline);
5217 	wline = NULL;
5218 	if (width < view->ncols - 1)
5219 		waddch(view->window, '\n');
5220 
5221 	if (view->gline > blame->nlines)
5222 		view->gline = blame->nlines;
5223 
5224 	if (asprintf(&line, "[%d/%d] %s%s", view->gline ? view->gline :
5225 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
5226 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
5227 		free(id_str);
5228 		return got_error_from_errno("asprintf");
5229 	}
5230 	free(id_str);
5231 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5232 	free(line);
5233 	line = NULL;
5234 	if (err)
5235 		return err;
5236 	waddwstr(view->window, wline);
5237 	free(wline);
5238 	wline = NULL;
5239 	if (width < view->ncols - 1)
5240 		waddch(view->window, '\n');
5241 
5242 	s->eof = 0;
5243 	view->maxx = 0;
5244 	while (nprinted < view->nlines - 2) {
5245 		linelen = getline(&line, &linesize, blame->f);
5246 		if (linelen == -1) {
5247 			if (feof(blame->f)) {
5248 				s->eof = 1;
5249 				break;
5250 			}
5251 			free(line);
5252 			return got_ferror(blame->f, GOT_ERR_IO);
5253 		}
5254 		if (++lineno < s->first_displayed_line)
5255 			continue;
5256 		if (view->gline && !gotoline(view, &lineno, &nprinted))
5257 			continue;
5258 
5259 		/* Set view->maxx based on full line length. */
5260 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
5261 		if (err) {
5262 			free(line);
5263 			return err;
5264 		}
5265 		free(wline);
5266 		wline = NULL;
5267 		view->maxx = MAX(view->maxx, width);
5268 
5269 		if (nprinted == s->selected_line - 1)
5270 			wstandout(view->window);
5271 
5272 		if (blame->nlines > 0) {
5273 			blame_line = &blame->lines[lineno - 1];
5274 			if (blame_line->annotated && prev_id &&
5275 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
5276 			    !(nprinted == s->selected_line - 1)) {
5277 				waddstr(view->window, "        ");
5278 			} else if (blame_line->annotated) {
5279 				char *id_str;
5280 				err = got_object_id_str(&id_str,
5281 				    blame_line->id);
5282 				if (err) {
5283 					free(line);
5284 					return err;
5285 				}
5286 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5287 				if (tc)
5288 					wattr_on(view->window,
5289 					    COLOR_PAIR(tc->colorpair), NULL);
5290 				wprintw(view->window, "%.8s", id_str);
5291 				if (tc)
5292 					wattr_off(view->window,
5293 					    COLOR_PAIR(tc->colorpair), NULL);
5294 				free(id_str);
5295 				prev_id = blame_line->id;
5296 			} else {
5297 				waddstr(view->window, "........");
5298 				prev_id = NULL;
5299 			}
5300 		} else {
5301 			waddstr(view->window, "........");
5302 			prev_id = NULL;
5303 		}
5304 
5305 		if (nprinted == s->selected_line - 1)
5306 			wstandend(view->window);
5307 		waddstr(view->window, " ");
5308 
5309 		if (view->ncols <= 9) {
5310 			width = 9;
5311 		} else if (s->first_displayed_line + nprinted ==
5312 		    s->matched_line &&
5313 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
5314 			err = add_matched_line(&width, line, view->ncols - 9, 9,
5315 			    view->window, view->x, regmatch);
5316 			if (err) {
5317 				free(line);
5318 				return err;
5319 			}
5320 			width += 9;
5321 		} else {
5322 			int skip;
5323 			err = format_line(&wline, &width, &skip, line,
5324 			    view->x, view->ncols - 9, 9, 1);
5325 			if (err) {
5326 				free(line);
5327 				return err;
5328 			}
5329 			waddwstr(view->window, &wline[skip]);
5330 			width += 9;
5331 			free(wline);
5332 			wline = NULL;
5333 		}
5334 
5335 		if (width <= view->ncols - 1)
5336 			waddch(view->window, '\n');
5337 		if (++nprinted == 1)
5338 			s->first_displayed_line = lineno;
5339 	}
5340 	free(line);
5341 	s->last_displayed_line = lineno;
5342 
5343 	view_border(view);
5344 
5345 	return NULL;
5346 }
5347 
5348 static const struct got_error *
5349 blame_cb(void *arg, int nlines, int lineno,
5350     struct got_commit_object *commit, struct got_object_id *id)
5351 {
5352 	const struct got_error *err = NULL;
5353 	struct tog_blame_cb_args *a = arg;
5354 	struct tog_blame_line *line;
5355 	int errcode;
5356 
5357 	if (nlines != a->nlines ||
5358 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
5359 		return got_error(GOT_ERR_RANGE);
5360 
5361 	errcode = pthread_mutex_lock(&tog_mutex);
5362 	if (errcode)
5363 		return got_error_set_errno(errcode, "pthread_mutex_lock");
5364 
5365 	if (*a->quit) {	/* user has quit the blame view */
5366 		err = got_error(GOT_ERR_ITER_COMPLETED);
5367 		goto done;
5368 	}
5369 
5370 	if (lineno == -1)
5371 		goto done; /* no change in this commit */
5372 
5373 	line = &a->lines[lineno - 1];
5374 	if (line->annotated)
5375 		goto done;
5376 
5377 	line->id = got_object_id_dup(id);
5378 	if (line->id == NULL) {
5379 		err = got_error_from_errno("got_object_id_dup");
5380 		goto done;
5381 	}
5382 	line->annotated = 1;
5383 done:
5384 	errcode = pthread_mutex_unlock(&tog_mutex);
5385 	if (errcode)
5386 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5387 	return err;
5388 }
5389 
5390 static void *
5391 blame_thread(void *arg)
5392 {
5393 	const struct got_error *err, *close_err;
5394 	struct tog_blame_thread_args *ta = arg;
5395 	struct tog_blame_cb_args *a = ta->cb_args;
5396 	int errcode, fd1 = -1, fd2 = -1;
5397 	FILE *f1 = NULL, *f2 = NULL;
5398 
5399 	fd1 = got_opentempfd();
5400 	if (fd1 == -1)
5401 		return (void *)got_error_from_errno("got_opentempfd");
5402 
5403 	fd2 = got_opentempfd();
5404 	if (fd2 == -1) {
5405 		err = got_error_from_errno("got_opentempfd");
5406 		goto done;
5407 	}
5408 
5409 	f1 = got_opentemp();
5410 	if (f1 == NULL) {
5411 		err = (void *)got_error_from_errno("got_opentemp");
5412 		goto done;
5413 	}
5414 	f2 = got_opentemp();
5415 	if (f2 == NULL) {
5416 		err = (void *)got_error_from_errno("got_opentemp");
5417 		goto done;
5418 	}
5419 
5420 	err = block_signals_used_by_main_thread();
5421 	if (err)
5422 		goto done;
5423 
5424 	err = got_blame(ta->path, a->commit_id, ta->repo,
5425 	    tog_diff_algo, blame_cb, ta->cb_args,
5426 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
5427 	if (err && err->code == GOT_ERR_CANCELLED)
5428 		err = NULL;
5429 
5430 	errcode = pthread_mutex_lock(&tog_mutex);
5431 	if (errcode) {
5432 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
5433 		goto done;
5434 	}
5435 
5436 	close_err = got_repo_close(ta->repo);
5437 	if (err == NULL)
5438 		err = close_err;
5439 	ta->repo = NULL;
5440 	*ta->complete = 1;
5441 
5442 	errcode = pthread_mutex_unlock(&tog_mutex);
5443 	if (errcode && err == NULL)
5444 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5445 
5446 done:
5447 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
5448 		err = got_error_from_errno("close");
5449 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
5450 		err = got_error_from_errno("close");
5451 	if (f1 && fclose(f1) == EOF && err == NULL)
5452 		err = got_error_from_errno("fclose");
5453 	if (f2 && fclose(f2) == EOF && err == NULL)
5454 		err = got_error_from_errno("fclose");
5455 
5456 	return (void *)err;
5457 }
5458 
5459 static struct got_object_id *
5460 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
5461     int first_displayed_line, int selected_line)
5462 {
5463 	struct tog_blame_line *line;
5464 
5465 	if (nlines <= 0)
5466 		return NULL;
5467 
5468 	line = &lines[first_displayed_line - 1 + selected_line - 1];
5469 	if (!line->annotated)
5470 		return NULL;
5471 
5472 	return line->id;
5473 }
5474 
5475 static struct got_object_id *
5476 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
5477     int lineno)
5478 {
5479 	struct tog_blame_line *line;
5480 
5481 	if (nlines <= 0 || lineno >= nlines)
5482 		return NULL;
5483 
5484 	line = &lines[lineno - 1];
5485 	if (!line->annotated)
5486 		return NULL;
5487 
5488 	return line->id;
5489 }
5490 
5491 static const struct got_error *
5492 stop_blame(struct tog_blame *blame)
5493 {
5494 	const struct got_error *err = NULL;
5495 	int i;
5496 
5497 	if (blame->thread) {
5498 		int errcode;
5499 		errcode = pthread_mutex_unlock(&tog_mutex);
5500 		if (errcode)
5501 			return got_error_set_errno(errcode,
5502 			    "pthread_mutex_unlock");
5503 		errcode = pthread_join(blame->thread, (void **)&err);
5504 		if (errcode)
5505 			return got_error_set_errno(errcode, "pthread_join");
5506 		errcode = pthread_mutex_lock(&tog_mutex);
5507 		if (errcode)
5508 			return got_error_set_errno(errcode,
5509 			    "pthread_mutex_lock");
5510 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
5511 			err = NULL;
5512 		blame->thread = NULL;
5513 	}
5514 	if (blame->thread_args.repo) {
5515 		const struct got_error *close_err;
5516 		close_err = got_repo_close(blame->thread_args.repo);
5517 		if (err == NULL)
5518 			err = close_err;
5519 		blame->thread_args.repo = NULL;
5520 	}
5521 	if (blame->f) {
5522 		if (fclose(blame->f) == EOF && err == NULL)
5523 			err = got_error_from_errno("fclose");
5524 		blame->f = NULL;
5525 	}
5526 	if (blame->lines) {
5527 		for (i = 0; i < blame->nlines; i++)
5528 			free(blame->lines[i].id);
5529 		free(blame->lines);
5530 		blame->lines = NULL;
5531 	}
5532 	free(blame->cb_args.commit_id);
5533 	blame->cb_args.commit_id = NULL;
5534 	if (blame->pack_fds) {
5535 		const struct got_error *pack_err =
5536 		    got_repo_pack_fds_close(blame->pack_fds);
5537 		if (err == NULL)
5538 			err = pack_err;
5539 		blame->pack_fds = NULL;
5540 	}
5541 	return err;
5542 }
5543 
5544 static const struct got_error *
5545 cancel_blame_view(void *arg)
5546 {
5547 	const struct got_error *err = NULL;
5548 	int *done = arg;
5549 	int errcode;
5550 
5551 	errcode = pthread_mutex_lock(&tog_mutex);
5552 	if (errcode)
5553 		return got_error_set_errno(errcode,
5554 		    "pthread_mutex_unlock");
5555 
5556 	if (*done)
5557 		err = got_error(GOT_ERR_CANCELLED);
5558 
5559 	errcode = pthread_mutex_unlock(&tog_mutex);
5560 	if (errcode)
5561 		return got_error_set_errno(errcode,
5562 		    "pthread_mutex_lock");
5563 
5564 	return err;
5565 }
5566 
5567 static const struct got_error *
5568 run_blame(struct tog_view *view)
5569 {
5570 	struct tog_blame_view_state *s = &view->state.blame;
5571 	struct tog_blame *blame = &s->blame;
5572 	const struct got_error *err = NULL;
5573 	struct got_commit_object *commit = NULL;
5574 	struct got_blob_object *blob = NULL;
5575 	struct got_repository *thread_repo = NULL;
5576 	struct got_object_id *obj_id = NULL;
5577 	int obj_type, fd = -1;
5578 	int *pack_fds = NULL;
5579 
5580 	err = got_object_open_as_commit(&commit, s->repo,
5581 	    &s->blamed_commit->id);
5582 	if (err)
5583 		return err;
5584 
5585 	fd = got_opentempfd();
5586 	if (fd == -1) {
5587 		err = got_error_from_errno("got_opentempfd");
5588 		goto done;
5589 	}
5590 
5591 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
5592 	if (err)
5593 		goto done;
5594 
5595 	err = got_object_get_type(&obj_type, s->repo, obj_id);
5596 	if (err)
5597 		goto done;
5598 
5599 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
5600 		err = got_error(GOT_ERR_OBJ_TYPE);
5601 		goto done;
5602 	}
5603 
5604 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
5605 	if (err)
5606 		goto done;
5607 	blame->f = got_opentemp();
5608 	if (blame->f == NULL) {
5609 		err = got_error_from_errno("got_opentemp");
5610 		goto done;
5611 	}
5612 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
5613 	    &blame->line_offsets, blame->f, blob);
5614 	if (err)
5615 		goto done;
5616 	if (blame->nlines == 0) {
5617 		s->blame_complete = 1;
5618 		goto done;
5619 	}
5620 
5621 	/* Don't include \n at EOF in the blame line count. */
5622 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
5623 		blame->nlines--;
5624 
5625 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
5626 	if (blame->lines == NULL) {
5627 		err = got_error_from_errno("calloc");
5628 		goto done;
5629 	}
5630 
5631 	err = got_repo_pack_fds_open(&pack_fds);
5632 	if (err)
5633 		goto done;
5634 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
5635 	    pack_fds);
5636 	if (err)
5637 		goto done;
5638 
5639 	blame->pack_fds = pack_fds;
5640 	blame->cb_args.view = view;
5641 	blame->cb_args.lines = blame->lines;
5642 	blame->cb_args.nlines = blame->nlines;
5643 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
5644 	if (blame->cb_args.commit_id == NULL) {
5645 		err = got_error_from_errno("got_object_id_dup");
5646 		goto done;
5647 	}
5648 	blame->cb_args.quit = &s->done;
5649 
5650 	blame->thread_args.path = s->path;
5651 	blame->thread_args.repo = thread_repo;
5652 	blame->thread_args.cb_args = &blame->cb_args;
5653 	blame->thread_args.complete = &s->blame_complete;
5654 	blame->thread_args.cancel_cb = cancel_blame_view;
5655 	blame->thread_args.cancel_arg = &s->done;
5656 	s->blame_complete = 0;
5657 
5658 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
5659 		s->first_displayed_line = 1;
5660 		s->last_displayed_line = view->nlines;
5661 		s->selected_line = 1;
5662 	}
5663 	s->matched_line = 0;
5664 
5665 done:
5666 	if (commit)
5667 		got_object_commit_close(commit);
5668 	if (fd != -1 && close(fd) == -1 && err == NULL)
5669 		err = got_error_from_errno("close");
5670 	if (blob)
5671 		got_object_blob_close(blob);
5672 	free(obj_id);
5673 	if (err)
5674 		stop_blame(blame);
5675 	return err;
5676 }
5677 
5678 static const struct got_error *
5679 open_blame_view(struct tog_view *view, char *path,
5680     struct got_object_id *commit_id, struct got_repository *repo)
5681 {
5682 	const struct got_error *err = NULL;
5683 	struct tog_blame_view_state *s = &view->state.blame;
5684 
5685 	STAILQ_INIT(&s->blamed_commits);
5686 
5687 	s->path = strdup(path);
5688 	if (s->path == NULL)
5689 		return got_error_from_errno("strdup");
5690 
5691 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
5692 	if (err) {
5693 		free(s->path);
5694 		return err;
5695 	}
5696 
5697 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
5698 	s->first_displayed_line = 1;
5699 	s->last_displayed_line = view->nlines;
5700 	s->selected_line = 1;
5701 	s->blame_complete = 0;
5702 	s->repo = repo;
5703 	s->commit_id = commit_id;
5704 	memset(&s->blame, 0, sizeof(s->blame));
5705 
5706 	STAILQ_INIT(&s->colors);
5707 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5708 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
5709 		    get_color_value("TOG_COLOR_COMMIT"));
5710 		if (err)
5711 			return err;
5712 	}
5713 
5714 	view->show = show_blame_view;
5715 	view->input = input_blame_view;
5716 	view->reset = reset_blame_view;
5717 	view->close = close_blame_view;
5718 	view->search_start = search_start_blame_view;
5719 	view->search_next = search_next_blame_view;
5720 
5721 	return run_blame(view);
5722 }
5723 
5724 static const struct got_error *
5725 close_blame_view(struct tog_view *view)
5726 {
5727 	const struct got_error *err = NULL;
5728 	struct tog_blame_view_state *s = &view->state.blame;
5729 
5730 	if (s->blame.thread)
5731 		err = stop_blame(&s->blame);
5732 
5733 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
5734 		struct got_object_qid *blamed_commit;
5735 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
5736 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5737 		got_object_qid_free(blamed_commit);
5738 	}
5739 
5740 	free(s->path);
5741 	free_colors(&s->colors);
5742 	return err;
5743 }
5744 
5745 static const struct got_error *
5746 search_start_blame_view(struct tog_view *view)
5747 {
5748 	struct tog_blame_view_state *s = &view->state.blame;
5749 
5750 	s->matched_line = 0;
5751 	return NULL;
5752 }
5753 
5754 static const struct got_error *
5755 search_next_blame_view(struct tog_view *view)
5756 {
5757 	struct tog_blame_view_state *s = &view->state.blame;
5758 	const struct got_error *err = NULL;
5759 	int lineno;
5760 	char *line = NULL;
5761 	size_t linesize = 0;
5762 	ssize_t linelen;
5763 
5764 	if (!view->searching) {
5765 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5766 		return NULL;
5767 	}
5768 
5769 	if (s->matched_line) {
5770 		if (view->searching == TOG_SEARCH_FORWARD)
5771 			lineno = s->matched_line + 1;
5772 		else
5773 			lineno = s->matched_line - 1;
5774 	} else
5775 		lineno = s->first_displayed_line - 1 + s->selected_line;
5776 
5777 	while (1) {
5778 		off_t offset;
5779 
5780 		if (lineno <= 0 || lineno > s->blame.nlines) {
5781 			if (s->matched_line == 0) {
5782 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5783 				break;
5784 			}
5785 
5786 			if (view->searching == TOG_SEARCH_FORWARD)
5787 				lineno = 1;
5788 			else
5789 				lineno = s->blame.nlines;
5790 		}
5791 
5792 		offset = s->blame.line_offsets[lineno - 1];
5793 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5794 			free(line);
5795 			return got_error_from_errno("fseeko");
5796 		}
5797 		linelen = getline(&line, &linesize, s->blame.f);
5798 		if (linelen != -1) {
5799 			char *exstr;
5800 			err = expand_tab(&exstr, line);
5801 			if (err)
5802 				break;
5803 			if (match_line(exstr, &view->regex, 1,
5804 			    &view->regmatch)) {
5805 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5806 				s->matched_line = lineno;
5807 				free(exstr);
5808 				break;
5809 			}
5810 			free(exstr);
5811 		}
5812 		if (view->searching == TOG_SEARCH_FORWARD)
5813 			lineno++;
5814 		else
5815 			lineno--;
5816 	}
5817 	free(line);
5818 
5819 	if (s->matched_line) {
5820 		s->first_displayed_line = s->matched_line;
5821 		s->selected_line = 1;
5822 	}
5823 
5824 	return err;
5825 }
5826 
5827 static const struct got_error *
5828 show_blame_view(struct tog_view *view)
5829 {
5830 	const struct got_error *err = NULL;
5831 	struct tog_blame_view_state *s = &view->state.blame;
5832 	int errcode;
5833 
5834 	if (s->blame.thread == NULL && !s->blame_complete) {
5835 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5836 		    &s->blame.thread_args);
5837 		if (errcode)
5838 			return got_error_set_errno(errcode, "pthread_create");
5839 
5840 		halfdelay(1); /* fast refresh while annotating  */
5841 	}
5842 
5843 	if (s->blame_complete)
5844 		halfdelay(10); /* disable fast refresh */
5845 
5846 	err = draw_blame(view);
5847 
5848 	view_border(view);
5849 	return err;
5850 }
5851 
5852 static const struct got_error *
5853 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
5854     struct got_repository *repo, struct got_object_id *id)
5855 {
5856 	struct tog_view		*log_view;
5857 	const struct got_error	*err = NULL;
5858 
5859 	*new_view = NULL;
5860 
5861 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
5862 	if (log_view == NULL)
5863 		return got_error_from_errno("view_open");
5864 
5865 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0);
5866 	if (err)
5867 		view_close(log_view);
5868 	else
5869 		*new_view = log_view;
5870 
5871 	return err;
5872 }
5873 
5874 static const struct got_error *
5875 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5876 {
5877 	const struct got_error *err = NULL, *thread_err = NULL;
5878 	struct tog_view *diff_view;
5879 	struct tog_blame_view_state *s = &view->state.blame;
5880 	int eos, nscroll, begin_y = 0, begin_x = 0;
5881 
5882 	eos = nscroll = view->nlines - 2;
5883 	if (view_is_hsplit_top(view))
5884 		--eos;  /* border */
5885 
5886 	switch (ch) {
5887 	case '0':
5888 		view->x = 0;
5889 		break;
5890 	case '$':
5891 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5892 		view->count = 0;
5893 		break;
5894 	case KEY_RIGHT:
5895 	case 'l':
5896 		if (view->x + view->ncols / 3 < view->maxx)
5897 			view->x += 2;  /* move two columns right */
5898 		else
5899 			view->count = 0;
5900 		break;
5901 	case KEY_LEFT:
5902 	case 'h':
5903 		view->x -= MIN(view->x, 2);  /* move two columns back */
5904 		if (view->x <= 0)
5905 			view->count = 0;
5906 		break;
5907 	case 'q':
5908 		s->done = 1;
5909 		break;
5910 	case 'g':
5911 	case KEY_HOME:
5912 		s->selected_line = 1;
5913 		s->first_displayed_line = 1;
5914 		view->count = 0;
5915 		break;
5916 	case 'G':
5917 	case KEY_END:
5918 		if (s->blame.nlines < eos) {
5919 			s->selected_line = s->blame.nlines;
5920 			s->first_displayed_line = 1;
5921 		} else {
5922 			s->selected_line = eos;
5923 			s->first_displayed_line = s->blame.nlines - (eos - 1);
5924 		}
5925 		view->count = 0;
5926 		break;
5927 	case 'k':
5928 	case KEY_UP:
5929 	case CTRL('p'):
5930 		if (s->selected_line > 1)
5931 			s->selected_line--;
5932 		else if (s->selected_line == 1 &&
5933 		    s->first_displayed_line > 1)
5934 			s->first_displayed_line--;
5935 		else
5936 			view->count = 0;
5937 		break;
5938 	case CTRL('u'):
5939 	case 'u':
5940 		nscroll /= 2;
5941 		/* FALL THROUGH */
5942 	case KEY_PPAGE:
5943 	case CTRL('b'):
5944 	case 'b':
5945 		if (s->first_displayed_line == 1) {
5946 			if (view->count > 1)
5947 				nscroll += nscroll;
5948 			s->selected_line = MAX(1, s->selected_line - nscroll);
5949 			view->count = 0;
5950 			break;
5951 		}
5952 		if (s->first_displayed_line > nscroll)
5953 			s->first_displayed_line -= nscroll;
5954 		else
5955 			s->first_displayed_line = 1;
5956 		break;
5957 	case 'j':
5958 	case KEY_DOWN:
5959 	case CTRL('n'):
5960 		if (s->selected_line < eos && s->first_displayed_line +
5961 		    s->selected_line <= s->blame.nlines)
5962 			s->selected_line++;
5963 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
5964 			s->first_displayed_line++;
5965 		else
5966 			view->count = 0;
5967 		break;
5968 	case 'c':
5969 	case 'p': {
5970 		struct got_object_id *id = NULL;
5971 
5972 		view->count = 0;
5973 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5974 		    s->first_displayed_line, s->selected_line);
5975 		if (id == NULL)
5976 			break;
5977 		if (ch == 'p') {
5978 			struct got_commit_object *commit, *pcommit;
5979 			struct got_object_qid *pid;
5980 			struct got_object_id *blob_id = NULL;
5981 			int obj_type;
5982 			err = got_object_open_as_commit(&commit,
5983 			    s->repo, id);
5984 			if (err)
5985 				break;
5986 			pid = STAILQ_FIRST(
5987 			    got_object_commit_get_parent_ids(commit));
5988 			if (pid == NULL) {
5989 				got_object_commit_close(commit);
5990 				break;
5991 			}
5992 			/* Check if path history ends here. */
5993 			err = got_object_open_as_commit(&pcommit,
5994 			    s->repo, &pid->id);
5995 			if (err)
5996 				break;
5997 			err = got_object_id_by_path(&blob_id, s->repo,
5998 			    pcommit, s->path);
5999 			got_object_commit_close(pcommit);
6000 			if (err) {
6001 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
6002 					err = NULL;
6003 				got_object_commit_close(commit);
6004 				break;
6005 			}
6006 			err = got_object_get_type(&obj_type, s->repo,
6007 			    blob_id);
6008 			free(blob_id);
6009 			/* Can't blame non-blob type objects. */
6010 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
6011 				got_object_commit_close(commit);
6012 				break;
6013 			}
6014 			err = got_object_qid_alloc(&s->blamed_commit,
6015 			    &pid->id);
6016 			got_object_commit_close(commit);
6017 		} else {
6018 			if (got_object_id_cmp(id,
6019 			    &s->blamed_commit->id) == 0)
6020 				break;
6021 			err = got_object_qid_alloc(&s->blamed_commit,
6022 			    id);
6023 		}
6024 		if (err)
6025 			break;
6026 		s->done = 1;
6027 		thread_err = stop_blame(&s->blame);
6028 		s->done = 0;
6029 		if (thread_err)
6030 			break;
6031 		STAILQ_INSERT_HEAD(&s->blamed_commits,
6032 		    s->blamed_commit, entry);
6033 		err = run_blame(view);
6034 		if (err)
6035 			break;
6036 		break;
6037 	}
6038 	case 'C': {
6039 		struct got_object_qid *first;
6040 
6041 		view->count = 0;
6042 		first = STAILQ_FIRST(&s->blamed_commits);
6043 		if (!got_object_id_cmp(&first->id, s->commit_id))
6044 			break;
6045 		s->done = 1;
6046 		thread_err = stop_blame(&s->blame);
6047 		s->done = 0;
6048 		if (thread_err)
6049 			break;
6050 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6051 		got_object_qid_free(s->blamed_commit);
6052 		s->blamed_commit =
6053 		    STAILQ_FIRST(&s->blamed_commits);
6054 		err = run_blame(view);
6055 		if (err)
6056 			break;
6057 		break;
6058 	}
6059 	case 'L':
6060 		view->count = 0;
6061 		s->id_to_log = get_selected_commit_id(s->blame.lines,
6062 		    s->blame.nlines, s->first_displayed_line, s->selected_line);
6063 		if (s->id_to_log)
6064 			err = view_request_new(new_view, view, TOG_VIEW_LOG);
6065 		break;
6066 	case KEY_ENTER:
6067 	case '\r': {
6068 		struct got_object_id *id = NULL;
6069 		struct got_object_qid *pid;
6070 		struct got_commit_object *commit = NULL;
6071 
6072 		view->count = 0;
6073 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
6074 		    s->first_displayed_line, s->selected_line);
6075 		if (id == NULL)
6076 			break;
6077 		err = got_object_open_as_commit(&commit, s->repo, id);
6078 		if (err)
6079 			break;
6080 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
6081 		if (*new_view) {
6082 			/* traversed from diff view, release diff resources  */
6083 			err = close_diff_view(*new_view);
6084 			if (err)
6085 				break;
6086 			diff_view = *new_view;
6087 		} else {
6088 			if (view_is_parent_view(view))
6089 				view_get_split(view, &begin_y, &begin_x);
6090 
6091 			diff_view = view_open(0, 0, begin_y, begin_x,
6092 			    TOG_VIEW_DIFF);
6093 			if (diff_view == NULL) {
6094 				got_object_commit_close(commit);
6095 				err = got_error_from_errno("view_open");
6096 				break;
6097 			}
6098 		}
6099 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
6100 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
6101 		got_object_commit_close(commit);
6102 		if (err) {
6103 			view_close(diff_view);
6104 			break;
6105 		}
6106 		s->last_diffed_line = s->first_displayed_line - 1 +
6107 		    s->selected_line;
6108 		if (*new_view)
6109 			break;	/* still open from active diff view */
6110 		if (view_is_parent_view(view) &&
6111 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6112 			err = view_init_hsplit(view, begin_y);
6113 			if (err)
6114 				break;
6115 		}
6116 
6117 		view->focussed = 0;
6118 		diff_view->focussed = 1;
6119 		diff_view->mode = view->mode;
6120 		diff_view->nlines = view->lines - begin_y;
6121 		if (view_is_parent_view(view)) {
6122 			view_transfer_size(diff_view, view);
6123 			err = view_close_child(view);
6124 			if (err)
6125 				break;
6126 			err = view_set_child(view, diff_view);
6127 			if (err)
6128 				break;
6129 			view->focus_child = 1;
6130 		} else
6131 			*new_view = diff_view;
6132 		if (err)
6133 			break;
6134 		break;
6135 	}
6136 	case CTRL('d'):
6137 	case 'd':
6138 		nscroll /= 2;
6139 		/* FALL THROUGH */
6140 	case KEY_NPAGE:
6141 	case CTRL('f'):
6142 	case 'f':
6143 	case ' ':
6144 		if (s->last_displayed_line >= s->blame.nlines &&
6145 		    s->selected_line >= MIN(s->blame.nlines,
6146 		    view->nlines - 2)) {
6147 			view->count = 0;
6148 			break;
6149 		}
6150 		if (s->last_displayed_line >= s->blame.nlines &&
6151 		    s->selected_line < view->nlines - 2) {
6152 			s->selected_line +=
6153 			    MIN(nscroll, s->last_displayed_line -
6154 			    s->first_displayed_line - s->selected_line + 1);
6155 		}
6156 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
6157 			s->first_displayed_line += nscroll;
6158 		else
6159 			s->first_displayed_line =
6160 			    s->blame.nlines - (view->nlines - 3);
6161 		break;
6162 	case KEY_RESIZE:
6163 		if (s->selected_line > view->nlines - 2) {
6164 			s->selected_line = MIN(s->blame.nlines,
6165 			    view->nlines - 2);
6166 		}
6167 		break;
6168 	default:
6169 		view->count = 0;
6170 		break;
6171 	}
6172 	return thread_err ? thread_err : err;
6173 }
6174 
6175 static const struct got_error *
6176 reset_blame_view(struct tog_view *view)
6177 {
6178 	const struct got_error *err;
6179 	struct tog_blame_view_state *s = &view->state.blame;
6180 
6181 	view->count = 0;
6182 	s->done = 1;
6183 	err = stop_blame(&s->blame);
6184 	s->done = 0;
6185 	if (err)
6186 		return err;
6187 	return run_blame(view);
6188 }
6189 
6190 static const struct got_error *
6191 cmd_blame(int argc, char *argv[])
6192 {
6193 	const struct got_error *error;
6194 	struct got_repository *repo = NULL;
6195 	struct got_worktree *worktree = NULL;
6196 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6197 	char *link_target = NULL;
6198 	struct got_object_id *commit_id = NULL;
6199 	struct got_commit_object *commit = NULL;
6200 	char *commit_id_str = NULL;
6201 	int ch;
6202 	struct tog_view *view;
6203 	int *pack_fds = NULL;
6204 
6205 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6206 		switch (ch) {
6207 		case 'c':
6208 			commit_id_str = optarg;
6209 			break;
6210 		case 'r':
6211 			repo_path = realpath(optarg, NULL);
6212 			if (repo_path == NULL)
6213 				return got_error_from_errno2("realpath",
6214 				    optarg);
6215 			break;
6216 		default:
6217 			usage_blame();
6218 			/* NOTREACHED */
6219 		}
6220 	}
6221 
6222 	argc -= optind;
6223 	argv += optind;
6224 
6225 	if (argc != 1)
6226 		usage_blame();
6227 
6228 	error = got_repo_pack_fds_open(&pack_fds);
6229 	if (error != NULL)
6230 		goto done;
6231 
6232 	if (repo_path == NULL) {
6233 		cwd = getcwd(NULL, 0);
6234 		if (cwd == NULL)
6235 			return got_error_from_errno("getcwd");
6236 		error = got_worktree_open(&worktree, cwd);
6237 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6238 			goto done;
6239 		if (worktree)
6240 			repo_path =
6241 			    strdup(got_worktree_get_repo_path(worktree));
6242 		else
6243 			repo_path = strdup(cwd);
6244 		if (repo_path == NULL) {
6245 			error = got_error_from_errno("strdup");
6246 			goto done;
6247 		}
6248 	}
6249 
6250 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6251 	if (error != NULL)
6252 		goto done;
6253 
6254 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
6255 	    worktree);
6256 	if (error)
6257 		goto done;
6258 
6259 	init_curses();
6260 
6261 	error = apply_unveil(got_repo_get_path(repo), NULL);
6262 	if (error)
6263 		goto done;
6264 
6265 	error = tog_load_refs(repo, 0);
6266 	if (error)
6267 		goto done;
6268 
6269 	if (commit_id_str == NULL) {
6270 		struct got_reference *head_ref;
6271 		error = got_ref_open(&head_ref, repo, worktree ?
6272 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
6273 		if (error != NULL)
6274 			goto done;
6275 		error = got_ref_resolve(&commit_id, repo, head_ref);
6276 		got_ref_close(head_ref);
6277 	} else {
6278 		error = got_repo_match_object_id(&commit_id, NULL,
6279 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6280 	}
6281 	if (error != NULL)
6282 		goto done;
6283 
6284 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
6285 	if (view == NULL) {
6286 		error = got_error_from_errno("view_open");
6287 		goto done;
6288 	}
6289 
6290 	error = got_object_open_as_commit(&commit, repo, commit_id);
6291 	if (error)
6292 		goto done;
6293 
6294 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
6295 	    commit, repo);
6296 	if (error)
6297 		goto done;
6298 
6299 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
6300 	    commit_id, repo);
6301 	if (error)
6302 		goto done;
6303 	if (worktree) {
6304 		/* Release work tree lock. */
6305 		got_worktree_close(worktree);
6306 		worktree = NULL;
6307 	}
6308 	error = view_loop(view);
6309 done:
6310 	free(repo_path);
6311 	free(in_repo_path);
6312 	free(link_target);
6313 	free(cwd);
6314 	free(commit_id);
6315 	if (commit)
6316 		got_object_commit_close(commit);
6317 	if (worktree)
6318 		got_worktree_close(worktree);
6319 	if (repo) {
6320 		const struct got_error *close_err = got_repo_close(repo);
6321 		if (error == NULL)
6322 			error = close_err;
6323 	}
6324 	if (pack_fds) {
6325 		const struct got_error *pack_err =
6326 		    got_repo_pack_fds_close(pack_fds);
6327 		if (error == NULL)
6328 			error = pack_err;
6329 	}
6330 	tog_free_refs();
6331 	return error;
6332 }
6333 
6334 static const struct got_error *
6335 draw_tree_entries(struct tog_view *view, const char *parent_path)
6336 {
6337 	struct tog_tree_view_state *s = &view->state.tree;
6338 	const struct got_error *err = NULL;
6339 	struct got_tree_entry *te;
6340 	wchar_t *wline;
6341 	struct tog_color *tc;
6342 	int width, n, nentries, i = 1;
6343 	int limit = view->nlines;
6344 
6345 	s->ndisplayed = 0;
6346 	if (view_is_hsplit_top(view))
6347 		--limit;  /* border */
6348 
6349 	werase(view->window);
6350 
6351 	if (limit == 0)
6352 		return NULL;
6353 
6354 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
6355 	    0, 0);
6356 	if (err)
6357 		return err;
6358 	if (view_needs_focus_indication(view))
6359 		wstandout(view->window);
6360 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6361 	if (tc)
6362 		wattr_on(view->window,
6363 		    COLOR_PAIR(tc->colorpair), NULL);
6364 	waddwstr(view->window, wline);
6365 	if (tc)
6366 		wattr_off(view->window,
6367 		    COLOR_PAIR(tc->colorpair), NULL);
6368 	if (view_needs_focus_indication(view))
6369 		wstandend(view->window);
6370 	free(wline);
6371 	wline = NULL;
6372 
6373 	if (s->selected_entry) {
6374 		i = got_tree_entry_get_index(s->selected_entry);
6375 		i += s->tree == s->root ? 1 : 2;  /* account for ".." entry */
6376 	}
6377 	nentries = got_object_tree_get_nentries(s->tree);
6378 	wprintw(view->window, " [%d/%d]", i,
6379 	    nentries + (s->tree == s->root ? 0 : 1));  /* ".." in !root tree */
6380 
6381 	if (width < view->ncols - 1)
6382 		waddch(view->window, '\n');
6383 	if (--limit <= 0)
6384 		return NULL;
6385 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
6386 	    0, 0);
6387 	if (err)
6388 		return err;
6389 	waddwstr(view->window, wline);
6390 	free(wline);
6391 	wline = NULL;
6392 	if (width < view->ncols - 1)
6393 		waddch(view->window, '\n');
6394 	if (--limit <= 0)
6395 		return NULL;
6396 	waddch(view->window, '\n');
6397 	if (--limit <= 0)
6398 		return NULL;
6399 
6400 	if (s->first_displayed_entry == NULL) {
6401 		te = got_object_tree_get_first_entry(s->tree);
6402 		if (s->selected == 0) {
6403 			if (view->focussed)
6404 				wstandout(view->window);
6405 			s->selected_entry = NULL;
6406 		}
6407 		waddstr(view->window, "  ..\n");	/* parent directory */
6408 		if (s->selected == 0 && view->focussed)
6409 			wstandend(view->window);
6410 		s->ndisplayed++;
6411 		if (--limit <= 0)
6412 			return NULL;
6413 		n = 1;
6414 	} else {
6415 		n = 0;
6416 		te = s->first_displayed_entry;
6417 	}
6418 
6419 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
6420 		char *line = NULL, *id_str = NULL, *link_target = NULL;
6421 		const char *modestr = "";
6422 		mode_t mode;
6423 
6424 		te = got_object_tree_get_entry(s->tree, i);
6425 		mode = got_tree_entry_get_mode(te);
6426 
6427 		if (s->show_ids) {
6428 			err = got_object_id_str(&id_str,
6429 			    got_tree_entry_get_id(te));
6430 			if (err)
6431 				return got_error_from_errno(
6432 				    "got_object_id_str");
6433 		}
6434 		if (got_object_tree_entry_is_submodule(te))
6435 			modestr = "$";
6436 		else if (S_ISLNK(mode)) {
6437 			int i;
6438 
6439 			err = got_tree_entry_get_symlink_target(&link_target,
6440 			    te, s->repo);
6441 			if (err) {
6442 				free(id_str);
6443 				return err;
6444 			}
6445 			for (i = 0; i < strlen(link_target); i++) {
6446 				if (!isprint((unsigned char)link_target[i]))
6447 					link_target[i] = '?';
6448 			}
6449 			modestr = "@";
6450 		}
6451 		else if (S_ISDIR(mode))
6452 			modestr = "/";
6453 		else if (mode & S_IXUSR)
6454 			modestr = "*";
6455 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
6456 		    got_tree_entry_get_name(te), modestr,
6457 		    link_target ? " -> ": "",
6458 		    link_target ? link_target : "") == -1) {
6459 			free(id_str);
6460 			free(link_target);
6461 			return got_error_from_errno("asprintf");
6462 		}
6463 		free(id_str);
6464 		free(link_target);
6465 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6466 		    0, 0);
6467 		if (err) {
6468 			free(line);
6469 			break;
6470 		}
6471 		if (n == s->selected) {
6472 			if (view->focussed)
6473 				wstandout(view->window);
6474 			s->selected_entry = te;
6475 		}
6476 		tc = match_color(&s->colors, line);
6477 		if (tc)
6478 			wattr_on(view->window,
6479 			    COLOR_PAIR(tc->colorpair), NULL);
6480 		waddwstr(view->window, wline);
6481 		if (tc)
6482 			wattr_off(view->window,
6483 			    COLOR_PAIR(tc->colorpair), NULL);
6484 		if (width < view->ncols - 1)
6485 			waddch(view->window, '\n');
6486 		if (n == s->selected && view->focussed)
6487 			wstandend(view->window);
6488 		free(line);
6489 		free(wline);
6490 		wline = NULL;
6491 		n++;
6492 		s->ndisplayed++;
6493 		s->last_displayed_entry = te;
6494 		if (--limit <= 0)
6495 			break;
6496 	}
6497 
6498 	return err;
6499 }
6500 
6501 static void
6502 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
6503 {
6504 	struct got_tree_entry *te;
6505 	int isroot = s->tree == s->root;
6506 	int i = 0;
6507 
6508 	if (s->first_displayed_entry == NULL)
6509 		return;
6510 
6511 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
6512 	while (i++ < maxscroll) {
6513 		if (te == NULL) {
6514 			if (!isroot)
6515 				s->first_displayed_entry = NULL;
6516 			break;
6517 		}
6518 		s->first_displayed_entry = te;
6519 		te = got_tree_entry_get_prev(s->tree, te);
6520 	}
6521 }
6522 
6523 static const struct got_error *
6524 tree_scroll_down(struct tog_view *view, int maxscroll)
6525 {
6526 	struct tog_tree_view_state *s = &view->state.tree;
6527 	struct got_tree_entry *next, *last;
6528 	int n = 0;
6529 
6530 	if (s->first_displayed_entry)
6531 		next = got_tree_entry_get_next(s->tree,
6532 		    s->first_displayed_entry);
6533 	else
6534 		next = got_object_tree_get_first_entry(s->tree);
6535 
6536 	last = s->last_displayed_entry;
6537 	while (next && n++ < maxscroll) {
6538 		if (last) {
6539 			s->last_displayed_entry = last;
6540 			last = got_tree_entry_get_next(s->tree, last);
6541 		}
6542 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
6543 			s->first_displayed_entry = next;
6544 			next = got_tree_entry_get_next(s->tree, next);
6545 		}
6546 	}
6547 
6548 	return NULL;
6549 }
6550 
6551 static const struct got_error *
6552 tree_entry_path(char **path, struct tog_parent_trees *parents,
6553     struct got_tree_entry *te)
6554 {
6555 	const struct got_error *err = NULL;
6556 	struct tog_parent_tree *pt;
6557 	size_t len = 2; /* for leading slash and NUL */
6558 
6559 	TAILQ_FOREACH(pt, parents, entry)
6560 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
6561 		    + 1 /* slash */;
6562 	if (te)
6563 		len += strlen(got_tree_entry_get_name(te));
6564 
6565 	*path = calloc(1, len);
6566 	if (path == NULL)
6567 		return got_error_from_errno("calloc");
6568 
6569 	(*path)[0] = '/';
6570 	pt = TAILQ_LAST(parents, tog_parent_trees);
6571 	while (pt) {
6572 		const char *name = got_tree_entry_get_name(pt->selected_entry);
6573 		if (strlcat(*path, name, len) >= len) {
6574 			err = got_error(GOT_ERR_NO_SPACE);
6575 			goto done;
6576 		}
6577 		if (strlcat(*path, "/", len) >= len) {
6578 			err = got_error(GOT_ERR_NO_SPACE);
6579 			goto done;
6580 		}
6581 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
6582 	}
6583 	if (te) {
6584 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
6585 			err = got_error(GOT_ERR_NO_SPACE);
6586 			goto done;
6587 		}
6588 	}
6589 done:
6590 	if (err) {
6591 		free(*path);
6592 		*path = NULL;
6593 	}
6594 	return err;
6595 }
6596 
6597 static const struct got_error *
6598 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6599     struct got_tree_entry *te, struct tog_parent_trees *parents,
6600     struct got_object_id *commit_id, struct got_repository *repo)
6601 {
6602 	const struct got_error *err = NULL;
6603 	char *path;
6604 	struct tog_view *blame_view;
6605 
6606 	*new_view = NULL;
6607 
6608 	err = tree_entry_path(&path, parents, te);
6609 	if (err)
6610 		return err;
6611 
6612 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
6613 	if (blame_view == NULL) {
6614 		err = got_error_from_errno("view_open");
6615 		goto done;
6616 	}
6617 
6618 	err = open_blame_view(blame_view, path, commit_id, repo);
6619 	if (err) {
6620 		if (err->code == GOT_ERR_CANCELLED)
6621 			err = NULL;
6622 		view_close(blame_view);
6623 	} else
6624 		*new_view = blame_view;
6625 done:
6626 	free(path);
6627 	return err;
6628 }
6629 
6630 static const struct got_error *
6631 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6632     struct tog_tree_view_state *s)
6633 {
6634 	struct tog_view *log_view;
6635 	const struct got_error *err = NULL;
6636 	char *path;
6637 
6638 	*new_view = NULL;
6639 
6640 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6641 	if (log_view == NULL)
6642 		return got_error_from_errno("view_open");
6643 
6644 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
6645 	if (err)
6646 		return err;
6647 
6648 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
6649 	    path, 0);
6650 	if (err)
6651 		view_close(log_view);
6652 	else
6653 		*new_view = log_view;
6654 	free(path);
6655 	return err;
6656 }
6657 
6658 static const struct got_error *
6659 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
6660     const char *head_ref_name, struct got_repository *repo)
6661 {
6662 	const struct got_error *err = NULL;
6663 	char *commit_id_str = NULL;
6664 	struct tog_tree_view_state *s = &view->state.tree;
6665 	struct got_commit_object *commit = NULL;
6666 
6667 	TAILQ_INIT(&s->parents);
6668 	STAILQ_INIT(&s->colors);
6669 
6670 	s->commit_id = got_object_id_dup(commit_id);
6671 	if (s->commit_id == NULL)
6672 		return got_error_from_errno("got_object_id_dup");
6673 
6674 	err = got_object_open_as_commit(&commit, repo, commit_id);
6675 	if (err)
6676 		goto done;
6677 
6678 	/*
6679 	 * The root is opened here and will be closed when the view is closed.
6680 	 * Any visited subtrees and their path-wise parents are opened and
6681 	 * closed on demand.
6682 	 */
6683 	err = got_object_open_as_tree(&s->root, repo,
6684 	    got_object_commit_get_tree_id(commit));
6685 	if (err)
6686 		goto done;
6687 	s->tree = s->root;
6688 
6689 	err = got_object_id_str(&commit_id_str, commit_id);
6690 	if (err != NULL)
6691 		goto done;
6692 
6693 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
6694 		err = got_error_from_errno("asprintf");
6695 		goto done;
6696 	}
6697 
6698 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
6699 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
6700 	if (head_ref_name) {
6701 		s->head_ref_name = strdup(head_ref_name);
6702 		if (s->head_ref_name == NULL) {
6703 			err = got_error_from_errno("strdup");
6704 			goto done;
6705 		}
6706 	}
6707 	s->repo = repo;
6708 
6709 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6710 		err = add_color(&s->colors, "\\$$",
6711 		    TOG_COLOR_TREE_SUBMODULE,
6712 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
6713 		if (err)
6714 			goto done;
6715 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
6716 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
6717 		if (err)
6718 			goto done;
6719 		err = add_color(&s->colors, "/$",
6720 		    TOG_COLOR_TREE_DIRECTORY,
6721 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
6722 		if (err)
6723 			goto done;
6724 
6725 		err = add_color(&s->colors, "\\*$",
6726 		    TOG_COLOR_TREE_EXECUTABLE,
6727 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
6728 		if (err)
6729 			goto done;
6730 
6731 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
6732 		    get_color_value("TOG_COLOR_COMMIT"));
6733 		if (err)
6734 			goto done;
6735 	}
6736 
6737 	view->show = show_tree_view;
6738 	view->input = input_tree_view;
6739 	view->close = close_tree_view;
6740 	view->search_start = search_start_tree_view;
6741 	view->search_next = search_next_tree_view;
6742 done:
6743 	free(commit_id_str);
6744 	if (commit)
6745 		got_object_commit_close(commit);
6746 	if (err)
6747 		close_tree_view(view);
6748 	return err;
6749 }
6750 
6751 static const struct got_error *
6752 close_tree_view(struct tog_view *view)
6753 {
6754 	struct tog_tree_view_state *s = &view->state.tree;
6755 
6756 	free_colors(&s->colors);
6757 	free(s->tree_label);
6758 	s->tree_label = NULL;
6759 	free(s->commit_id);
6760 	s->commit_id = NULL;
6761 	free(s->head_ref_name);
6762 	s->head_ref_name = NULL;
6763 	while (!TAILQ_EMPTY(&s->parents)) {
6764 		struct tog_parent_tree *parent;
6765 		parent = TAILQ_FIRST(&s->parents);
6766 		TAILQ_REMOVE(&s->parents, parent, entry);
6767 		if (parent->tree != s->root)
6768 			got_object_tree_close(parent->tree);
6769 		free(parent);
6770 
6771 	}
6772 	if (s->tree != NULL && s->tree != s->root)
6773 		got_object_tree_close(s->tree);
6774 	if (s->root)
6775 		got_object_tree_close(s->root);
6776 	return NULL;
6777 }
6778 
6779 static const struct got_error *
6780 search_start_tree_view(struct tog_view *view)
6781 {
6782 	struct tog_tree_view_state *s = &view->state.tree;
6783 
6784 	s->matched_entry = NULL;
6785 	return NULL;
6786 }
6787 
6788 static int
6789 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
6790 {
6791 	regmatch_t regmatch;
6792 
6793 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
6794 	    0) == 0;
6795 }
6796 
6797 static const struct got_error *
6798 search_next_tree_view(struct tog_view *view)
6799 {
6800 	struct tog_tree_view_state *s = &view->state.tree;
6801 	struct got_tree_entry *te = NULL;
6802 
6803 	if (!view->searching) {
6804 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6805 		return NULL;
6806 	}
6807 
6808 	if (s->matched_entry) {
6809 		if (view->searching == TOG_SEARCH_FORWARD) {
6810 			if (s->selected_entry)
6811 				te = got_tree_entry_get_next(s->tree,
6812 				    s->selected_entry);
6813 			else
6814 				te = got_object_tree_get_first_entry(s->tree);
6815 		} else {
6816 			if (s->selected_entry == NULL)
6817 				te = got_object_tree_get_last_entry(s->tree);
6818 			else
6819 				te = got_tree_entry_get_prev(s->tree,
6820 				    s->selected_entry);
6821 		}
6822 	} else {
6823 		if (s->selected_entry)
6824 			te = s->selected_entry;
6825 		else if (view->searching == TOG_SEARCH_FORWARD)
6826 			te = got_object_tree_get_first_entry(s->tree);
6827 		else
6828 			te = got_object_tree_get_last_entry(s->tree);
6829 	}
6830 
6831 	while (1) {
6832 		if (te == NULL) {
6833 			if (s->matched_entry == NULL) {
6834 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6835 				return NULL;
6836 			}
6837 			if (view->searching == TOG_SEARCH_FORWARD)
6838 				te = got_object_tree_get_first_entry(s->tree);
6839 			else
6840 				te = got_object_tree_get_last_entry(s->tree);
6841 		}
6842 
6843 		if (match_tree_entry(te, &view->regex)) {
6844 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6845 			s->matched_entry = te;
6846 			break;
6847 		}
6848 
6849 		if (view->searching == TOG_SEARCH_FORWARD)
6850 			te = got_tree_entry_get_next(s->tree, te);
6851 		else
6852 			te = got_tree_entry_get_prev(s->tree, te);
6853 	}
6854 
6855 	if (s->matched_entry) {
6856 		s->first_displayed_entry = s->matched_entry;
6857 		s->selected = 0;
6858 	}
6859 
6860 	return NULL;
6861 }
6862 
6863 static const struct got_error *
6864 show_tree_view(struct tog_view *view)
6865 {
6866 	const struct got_error *err = NULL;
6867 	struct tog_tree_view_state *s = &view->state.tree;
6868 	char *parent_path;
6869 
6870 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6871 	if (err)
6872 		return err;
6873 
6874 	err = draw_tree_entries(view, parent_path);
6875 	free(parent_path);
6876 
6877 	view_border(view);
6878 	return err;
6879 }
6880 
6881 static const struct got_error *
6882 tree_goto_line(struct tog_view *view, int nlines)
6883 {
6884 	const struct got_error		 *err = NULL;
6885 	struct tog_tree_view_state	 *s = &view->state.tree;
6886 	struct got_tree_entry		**fte, **lte, **ste;
6887 	int				  g, last, first = 1, i = 1;
6888 	int				  root = s->tree == s->root;
6889 	int				  off = root ? 1 : 2;
6890 
6891 	g = view->gline;
6892 	view->gline = 0;
6893 
6894 	if (g == 0)
6895 		g = 1;
6896 	else if (g > got_object_tree_get_nentries(s->tree))
6897 		g = got_object_tree_get_nentries(s->tree) + (root ? 0 : 1);
6898 
6899 	fte = &s->first_displayed_entry;
6900 	lte = &s->last_displayed_entry;
6901 	ste = &s->selected_entry;
6902 
6903 	if (*fte != NULL) {
6904 		first = got_tree_entry_get_index(*fte);
6905 		first += off;  /* account for ".." */
6906 	}
6907 	last = got_tree_entry_get_index(*lte);
6908 	last += off;
6909 
6910 	if (g >= first && g <= last && g - first < nlines) {
6911 		s->selected = g - first;
6912 		return NULL;	/* gline is on the current page */
6913 	}
6914 
6915 	if (*ste != NULL) {
6916 		i = got_tree_entry_get_index(*ste);
6917 		i += off;
6918 	}
6919 
6920 	if (i < g) {
6921 		err = tree_scroll_down(view, g - i);
6922 		if (err)
6923 			return err;
6924 		if (got_tree_entry_get_index(*lte) >=
6925 		    got_object_tree_get_nentries(s->tree) - 1 &&
6926 		    first + s->selected < g &&
6927 		    s->selected < s->ndisplayed - 1) {
6928 			first = got_tree_entry_get_index(*fte);
6929 			first += off;
6930 			s->selected = g - first;
6931 		}
6932 	} else if (i > g)
6933 		tree_scroll_up(s, i - g);
6934 
6935 	if (g < nlines &&
6936 	    (*fte == NULL || (root && !got_tree_entry_get_index(*fte))))
6937 		s->selected = g - 1;
6938 
6939 	return NULL;
6940 }
6941 
6942 static const struct got_error *
6943 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6944 {
6945 	const struct got_error *err = NULL;
6946 	struct tog_tree_view_state *s = &view->state.tree;
6947 	struct got_tree_entry *te;
6948 	int n, nscroll = view->nlines - 3;
6949 
6950 	if (view->gline)
6951 		return tree_goto_line(view, nscroll);
6952 
6953 	switch (ch) {
6954 	case 'i':
6955 		s->show_ids = !s->show_ids;
6956 		view->count = 0;
6957 		break;
6958 	case 'L':
6959 		view->count = 0;
6960 		if (!s->selected_entry)
6961 			break;
6962 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
6963 		break;
6964 	case 'R':
6965 		view->count = 0;
6966 		err = view_request_new(new_view, view, TOG_VIEW_REF);
6967 		break;
6968 	case 'g':
6969 	case KEY_HOME:
6970 		s->selected = 0;
6971 		view->count = 0;
6972 		if (s->tree == s->root)
6973 			s->first_displayed_entry =
6974 			    got_object_tree_get_first_entry(s->tree);
6975 		else
6976 			s->first_displayed_entry = NULL;
6977 		break;
6978 	case 'G':
6979 	case KEY_END: {
6980 		int eos = view->nlines - 3;
6981 
6982 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
6983 			--eos;  /* border */
6984 		s->selected = 0;
6985 		view->count = 0;
6986 		te = got_object_tree_get_last_entry(s->tree);
6987 		for (n = 0; n < eos; n++) {
6988 			if (te == NULL) {
6989 				if (s->tree != s->root) {
6990 					s->first_displayed_entry = NULL;
6991 					n++;
6992 				}
6993 				break;
6994 			}
6995 			s->first_displayed_entry = te;
6996 			te = got_tree_entry_get_prev(s->tree, te);
6997 		}
6998 		if (n > 0)
6999 			s->selected = n - 1;
7000 		break;
7001 	}
7002 	case 'k':
7003 	case KEY_UP:
7004 	case CTRL('p'):
7005 		if (s->selected > 0) {
7006 			s->selected--;
7007 			break;
7008 		}
7009 		tree_scroll_up(s, 1);
7010 		if (s->selected_entry == NULL ||
7011 		    (s->tree == s->root && s->selected_entry ==
7012 		     got_object_tree_get_first_entry(s->tree)))
7013 			view->count = 0;
7014 		break;
7015 	case CTRL('u'):
7016 	case 'u':
7017 		nscroll /= 2;
7018 		/* FALL THROUGH */
7019 	case KEY_PPAGE:
7020 	case CTRL('b'):
7021 	case 'b':
7022 		if (s->tree == s->root) {
7023 			if (got_object_tree_get_first_entry(s->tree) ==
7024 			    s->first_displayed_entry)
7025 				s->selected -= MIN(s->selected, nscroll);
7026 		} else {
7027 			if (s->first_displayed_entry == NULL)
7028 				s->selected -= MIN(s->selected, nscroll);
7029 		}
7030 		tree_scroll_up(s, MAX(0, nscroll));
7031 		if (s->selected_entry == NULL ||
7032 		    (s->tree == s->root && s->selected_entry ==
7033 		     got_object_tree_get_first_entry(s->tree)))
7034 			view->count = 0;
7035 		break;
7036 	case 'j':
7037 	case KEY_DOWN:
7038 	case CTRL('n'):
7039 		if (s->selected < s->ndisplayed - 1) {
7040 			s->selected++;
7041 			break;
7042 		}
7043 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7044 		    == NULL) {
7045 			/* can't scroll any further */
7046 			view->count = 0;
7047 			break;
7048 		}
7049 		tree_scroll_down(view, 1);
7050 		break;
7051 	case CTRL('d'):
7052 	case 'd':
7053 		nscroll /= 2;
7054 		/* FALL THROUGH */
7055 	case KEY_NPAGE:
7056 	case CTRL('f'):
7057 	case 'f':
7058 	case ' ':
7059 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7060 		    == NULL) {
7061 			/* can't scroll any further; move cursor down */
7062 			if (s->selected < s->ndisplayed - 1)
7063 				s->selected += MIN(nscroll,
7064 				    s->ndisplayed - s->selected - 1);
7065 			else
7066 				view->count = 0;
7067 			break;
7068 		}
7069 		tree_scroll_down(view, nscroll);
7070 		break;
7071 	case KEY_ENTER:
7072 	case '\r':
7073 	case KEY_BACKSPACE:
7074 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
7075 			struct tog_parent_tree *parent;
7076 			/* user selected '..' */
7077 			if (s->tree == s->root) {
7078 				view->count = 0;
7079 				break;
7080 			}
7081 			parent = TAILQ_FIRST(&s->parents);
7082 			TAILQ_REMOVE(&s->parents, parent,
7083 			    entry);
7084 			got_object_tree_close(s->tree);
7085 			s->tree = parent->tree;
7086 			s->first_displayed_entry =
7087 			    parent->first_displayed_entry;
7088 			s->selected_entry =
7089 			    parent->selected_entry;
7090 			s->selected = parent->selected;
7091 			if (s->selected > view->nlines - 3) {
7092 				err = offset_selection_down(view);
7093 				if (err)
7094 					break;
7095 			}
7096 			free(parent);
7097 		} else if (S_ISDIR(got_tree_entry_get_mode(
7098 		    s->selected_entry))) {
7099 			struct got_tree_object *subtree;
7100 			view->count = 0;
7101 			err = got_object_open_as_tree(&subtree, s->repo,
7102 			    got_tree_entry_get_id(s->selected_entry));
7103 			if (err)
7104 				break;
7105 			err = tree_view_visit_subtree(s, subtree);
7106 			if (err) {
7107 				got_object_tree_close(subtree);
7108 				break;
7109 			}
7110 		} else if (S_ISREG(got_tree_entry_get_mode(s->selected_entry)))
7111 			err = view_request_new(new_view, view, TOG_VIEW_BLAME);
7112 		break;
7113 	case KEY_RESIZE:
7114 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
7115 			s->selected = view->nlines - 4;
7116 		view->count = 0;
7117 		break;
7118 	default:
7119 		view->count = 0;
7120 		break;
7121 	}
7122 
7123 	return err;
7124 }
7125 
7126 __dead static void
7127 usage_tree(void)
7128 {
7129 	endwin();
7130 	fprintf(stderr,
7131 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
7132 	    getprogname());
7133 	exit(1);
7134 }
7135 
7136 static const struct got_error *
7137 cmd_tree(int argc, char *argv[])
7138 {
7139 	const struct got_error *error;
7140 	struct got_repository *repo = NULL;
7141 	struct got_worktree *worktree = NULL;
7142 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7143 	struct got_object_id *commit_id = NULL;
7144 	struct got_commit_object *commit = NULL;
7145 	const char *commit_id_arg = NULL;
7146 	char *label = NULL;
7147 	struct got_reference *ref = NULL;
7148 	const char *head_ref_name = NULL;
7149 	int ch;
7150 	struct tog_view *view;
7151 	int *pack_fds = NULL;
7152 
7153 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7154 		switch (ch) {
7155 		case 'c':
7156 			commit_id_arg = optarg;
7157 			break;
7158 		case 'r':
7159 			repo_path = realpath(optarg, NULL);
7160 			if (repo_path == NULL)
7161 				return got_error_from_errno2("realpath",
7162 				    optarg);
7163 			break;
7164 		default:
7165 			usage_tree();
7166 			/* NOTREACHED */
7167 		}
7168 	}
7169 
7170 	argc -= optind;
7171 	argv += optind;
7172 
7173 	if (argc > 1)
7174 		usage_tree();
7175 
7176 	error = got_repo_pack_fds_open(&pack_fds);
7177 	if (error != NULL)
7178 		goto done;
7179 
7180 	if (repo_path == NULL) {
7181 		cwd = getcwd(NULL, 0);
7182 		if (cwd == NULL)
7183 			return got_error_from_errno("getcwd");
7184 		error = got_worktree_open(&worktree, cwd);
7185 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7186 			goto done;
7187 		if (worktree)
7188 			repo_path =
7189 			    strdup(got_worktree_get_repo_path(worktree));
7190 		else
7191 			repo_path = strdup(cwd);
7192 		if (repo_path == NULL) {
7193 			error = got_error_from_errno("strdup");
7194 			goto done;
7195 		}
7196 	}
7197 
7198 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7199 	if (error != NULL)
7200 		goto done;
7201 
7202 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7203 	    repo, worktree);
7204 	if (error)
7205 		goto done;
7206 
7207 	init_curses();
7208 
7209 	error = apply_unveil(got_repo_get_path(repo), NULL);
7210 	if (error)
7211 		goto done;
7212 
7213 	error = tog_load_refs(repo, 0);
7214 	if (error)
7215 		goto done;
7216 
7217 	if (commit_id_arg == NULL) {
7218 		error = got_repo_match_object_id(&commit_id, &label,
7219 		    worktree ? got_worktree_get_head_ref_name(worktree) :
7220 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7221 		if (error)
7222 			goto done;
7223 		head_ref_name = label;
7224 	} else {
7225 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
7226 		if (error == NULL)
7227 			head_ref_name = got_ref_get_name(ref);
7228 		else if (error->code != GOT_ERR_NOT_REF)
7229 			goto done;
7230 		error = got_repo_match_object_id(&commit_id, NULL,
7231 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7232 		if (error)
7233 			goto done;
7234 	}
7235 
7236 	error = got_object_open_as_commit(&commit, repo, commit_id);
7237 	if (error)
7238 		goto done;
7239 
7240 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
7241 	if (view == NULL) {
7242 		error = got_error_from_errno("view_open");
7243 		goto done;
7244 	}
7245 	error = open_tree_view(view, commit_id, head_ref_name, repo);
7246 	if (error)
7247 		goto done;
7248 	if (!got_path_is_root_dir(in_repo_path)) {
7249 		error = tree_view_walk_path(&view->state.tree, commit,
7250 		    in_repo_path);
7251 		if (error)
7252 			goto done;
7253 	}
7254 
7255 	if (worktree) {
7256 		/* Release work tree lock. */
7257 		got_worktree_close(worktree);
7258 		worktree = NULL;
7259 	}
7260 	error = view_loop(view);
7261 done:
7262 	free(repo_path);
7263 	free(cwd);
7264 	free(commit_id);
7265 	free(label);
7266 	if (ref)
7267 		got_ref_close(ref);
7268 	if (repo) {
7269 		const struct got_error *close_err = got_repo_close(repo);
7270 		if (error == NULL)
7271 			error = close_err;
7272 	}
7273 	if (pack_fds) {
7274 		const struct got_error *pack_err =
7275 		    got_repo_pack_fds_close(pack_fds);
7276 		if (error == NULL)
7277 			error = pack_err;
7278 	}
7279 	tog_free_refs();
7280 	return error;
7281 }
7282 
7283 static const struct got_error *
7284 ref_view_load_refs(struct tog_ref_view_state *s)
7285 {
7286 	struct got_reflist_entry *sre;
7287 	struct tog_reflist_entry *re;
7288 
7289 	s->nrefs = 0;
7290 	TAILQ_FOREACH(sre, &tog_refs, entry) {
7291 		if (strncmp(got_ref_get_name(sre->ref),
7292 		    "refs/got/", 9) == 0 &&
7293 		    strncmp(got_ref_get_name(sre->ref),
7294 		    "refs/got/backup/", 16) != 0)
7295 			continue;
7296 
7297 		re = malloc(sizeof(*re));
7298 		if (re == NULL)
7299 			return got_error_from_errno("malloc");
7300 
7301 		re->ref = got_ref_dup(sre->ref);
7302 		if (re->ref == NULL)
7303 			return got_error_from_errno("got_ref_dup");
7304 		re->idx = s->nrefs++;
7305 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
7306 	}
7307 
7308 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7309 	return NULL;
7310 }
7311 
7312 static void
7313 ref_view_free_refs(struct tog_ref_view_state *s)
7314 {
7315 	struct tog_reflist_entry *re;
7316 
7317 	while (!TAILQ_EMPTY(&s->refs)) {
7318 		re = TAILQ_FIRST(&s->refs);
7319 		TAILQ_REMOVE(&s->refs, re, entry);
7320 		got_ref_close(re->ref);
7321 		free(re);
7322 	}
7323 }
7324 
7325 static const struct got_error *
7326 open_ref_view(struct tog_view *view, struct got_repository *repo)
7327 {
7328 	const struct got_error *err = NULL;
7329 	struct tog_ref_view_state *s = &view->state.ref;
7330 
7331 	s->selected_entry = 0;
7332 	s->repo = repo;
7333 
7334 	TAILQ_INIT(&s->refs);
7335 	STAILQ_INIT(&s->colors);
7336 
7337 	err = ref_view_load_refs(s);
7338 	if (err)
7339 		return err;
7340 
7341 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7342 		err = add_color(&s->colors, "^refs/heads/",
7343 		    TOG_COLOR_REFS_HEADS,
7344 		    get_color_value("TOG_COLOR_REFS_HEADS"));
7345 		if (err)
7346 			goto done;
7347 
7348 		err = add_color(&s->colors, "^refs/tags/",
7349 		    TOG_COLOR_REFS_TAGS,
7350 		    get_color_value("TOG_COLOR_REFS_TAGS"));
7351 		if (err)
7352 			goto done;
7353 
7354 		err = add_color(&s->colors, "^refs/remotes/",
7355 		    TOG_COLOR_REFS_REMOTES,
7356 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
7357 		if (err)
7358 			goto done;
7359 
7360 		err = add_color(&s->colors, "^refs/got/backup/",
7361 		    TOG_COLOR_REFS_BACKUP,
7362 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
7363 		if (err)
7364 			goto done;
7365 	}
7366 
7367 	view->show = show_ref_view;
7368 	view->input = input_ref_view;
7369 	view->close = close_ref_view;
7370 	view->search_start = search_start_ref_view;
7371 	view->search_next = search_next_ref_view;
7372 done:
7373 	if (err)
7374 		free_colors(&s->colors);
7375 	return err;
7376 }
7377 
7378 static const struct got_error *
7379 close_ref_view(struct tog_view *view)
7380 {
7381 	struct tog_ref_view_state *s = &view->state.ref;
7382 
7383 	ref_view_free_refs(s);
7384 	free_colors(&s->colors);
7385 
7386 	return NULL;
7387 }
7388 
7389 static const struct got_error *
7390 resolve_reflist_entry(struct got_object_id **commit_id,
7391     struct tog_reflist_entry *re, struct got_repository *repo)
7392 {
7393 	const struct got_error *err = NULL;
7394 	struct got_object_id *obj_id;
7395 	struct got_tag_object *tag = NULL;
7396 	int obj_type;
7397 
7398 	*commit_id = NULL;
7399 
7400 	err = got_ref_resolve(&obj_id, repo, re->ref);
7401 	if (err)
7402 		return err;
7403 
7404 	err = got_object_get_type(&obj_type, repo, obj_id);
7405 	if (err)
7406 		goto done;
7407 
7408 	switch (obj_type) {
7409 	case GOT_OBJ_TYPE_COMMIT:
7410 		*commit_id = obj_id;
7411 		break;
7412 	case GOT_OBJ_TYPE_TAG:
7413 		err = got_object_open_as_tag(&tag, repo, obj_id);
7414 		if (err)
7415 			goto done;
7416 		free(obj_id);
7417 		err = got_object_get_type(&obj_type, repo,
7418 		    got_object_tag_get_object_id(tag));
7419 		if (err)
7420 			goto done;
7421 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
7422 			err = got_error(GOT_ERR_OBJ_TYPE);
7423 			goto done;
7424 		}
7425 		*commit_id = got_object_id_dup(
7426 		    got_object_tag_get_object_id(tag));
7427 		if (*commit_id == NULL) {
7428 			err = got_error_from_errno("got_object_id_dup");
7429 			goto done;
7430 		}
7431 		break;
7432 	default:
7433 		err = got_error(GOT_ERR_OBJ_TYPE);
7434 		break;
7435 	}
7436 
7437 done:
7438 	if (tag)
7439 		got_object_tag_close(tag);
7440 	if (err) {
7441 		free(*commit_id);
7442 		*commit_id = NULL;
7443 	}
7444 	return err;
7445 }
7446 
7447 static const struct got_error *
7448 log_ref_entry(struct tog_view **new_view, int begin_y, int begin_x,
7449     struct tog_reflist_entry *re, struct got_repository *repo)
7450 {
7451 	struct tog_view *log_view;
7452 	const struct got_error *err = NULL;
7453 	struct got_object_id *commit_id = NULL;
7454 
7455 	*new_view = NULL;
7456 
7457 	err = resolve_reflist_entry(&commit_id, re, repo);
7458 	if (err) {
7459 		if (err->code != GOT_ERR_OBJ_TYPE)
7460 			return err;
7461 		else
7462 			return NULL;
7463 	}
7464 
7465 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7466 	if (log_view == NULL) {
7467 		err = got_error_from_errno("view_open");
7468 		goto done;
7469 	}
7470 
7471 	err = open_log_view(log_view, commit_id, repo,
7472 	    got_ref_get_name(re->ref), "", 0);
7473 done:
7474 	if (err)
7475 		view_close(log_view);
7476 	else
7477 		*new_view = log_view;
7478 	free(commit_id);
7479 	return err;
7480 }
7481 
7482 static void
7483 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
7484 {
7485 	struct tog_reflist_entry *re;
7486 	int i = 0;
7487 
7488 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7489 		return;
7490 
7491 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
7492 	while (i++ < maxscroll) {
7493 		if (re == NULL)
7494 			break;
7495 		s->first_displayed_entry = re;
7496 		re = TAILQ_PREV(re, tog_reflist_head, entry);
7497 	}
7498 }
7499 
7500 static const struct got_error *
7501 ref_scroll_down(struct tog_view *view, int maxscroll)
7502 {
7503 	struct tog_ref_view_state *s = &view->state.ref;
7504 	struct tog_reflist_entry *next, *last;
7505 	int n = 0;
7506 
7507 	if (s->first_displayed_entry)
7508 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
7509 	else
7510 		next = TAILQ_FIRST(&s->refs);
7511 
7512 	last = s->last_displayed_entry;
7513 	while (next && n++ < maxscroll) {
7514 		if (last) {
7515 			s->last_displayed_entry = last;
7516 			last = TAILQ_NEXT(last, entry);
7517 		}
7518 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN)) {
7519 			s->first_displayed_entry = next;
7520 			next = TAILQ_NEXT(next, entry);
7521 		}
7522 	}
7523 
7524 	return NULL;
7525 }
7526 
7527 static const struct got_error *
7528 search_start_ref_view(struct tog_view *view)
7529 {
7530 	struct tog_ref_view_state *s = &view->state.ref;
7531 
7532 	s->matched_entry = NULL;
7533 	return NULL;
7534 }
7535 
7536 static int
7537 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
7538 {
7539 	regmatch_t regmatch;
7540 
7541 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
7542 	    0) == 0;
7543 }
7544 
7545 static const struct got_error *
7546 search_next_ref_view(struct tog_view *view)
7547 {
7548 	struct tog_ref_view_state *s = &view->state.ref;
7549 	struct tog_reflist_entry *re = NULL;
7550 
7551 	if (!view->searching) {
7552 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7553 		return NULL;
7554 	}
7555 
7556 	if (s->matched_entry) {
7557 		if (view->searching == TOG_SEARCH_FORWARD) {
7558 			if (s->selected_entry)
7559 				re = TAILQ_NEXT(s->selected_entry, entry);
7560 			else
7561 				re = TAILQ_PREV(s->selected_entry,
7562 				    tog_reflist_head, entry);
7563 		} else {
7564 			if (s->selected_entry == NULL)
7565 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7566 			else
7567 				re = TAILQ_PREV(s->selected_entry,
7568 				    tog_reflist_head, entry);
7569 		}
7570 	} else {
7571 		if (s->selected_entry)
7572 			re = s->selected_entry;
7573 		else if (view->searching == TOG_SEARCH_FORWARD)
7574 			re = TAILQ_FIRST(&s->refs);
7575 		else
7576 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
7577 	}
7578 
7579 	while (1) {
7580 		if (re == NULL) {
7581 			if (s->matched_entry == NULL) {
7582 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7583 				return NULL;
7584 			}
7585 			if (view->searching == TOG_SEARCH_FORWARD)
7586 				re = TAILQ_FIRST(&s->refs);
7587 			else
7588 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7589 		}
7590 
7591 		if (match_reflist_entry(re, &view->regex)) {
7592 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7593 			s->matched_entry = re;
7594 			break;
7595 		}
7596 
7597 		if (view->searching == TOG_SEARCH_FORWARD)
7598 			re = TAILQ_NEXT(re, entry);
7599 		else
7600 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7601 	}
7602 
7603 	if (s->matched_entry) {
7604 		s->first_displayed_entry = s->matched_entry;
7605 		s->selected = 0;
7606 	}
7607 
7608 	return NULL;
7609 }
7610 
7611 static const struct got_error *
7612 show_ref_view(struct tog_view *view)
7613 {
7614 	const struct got_error *err = NULL;
7615 	struct tog_ref_view_state *s = &view->state.ref;
7616 	struct tog_reflist_entry *re;
7617 	char *line = NULL;
7618 	wchar_t *wline;
7619 	struct tog_color *tc;
7620 	int width, n;
7621 	int limit = view->nlines;
7622 
7623 	werase(view->window);
7624 
7625 	s->ndisplayed = 0;
7626 	if (view_is_hsplit_top(view))
7627 		--limit;  /* border */
7628 
7629 	if (limit == 0)
7630 		return NULL;
7631 
7632 	re = s->first_displayed_entry;
7633 
7634 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
7635 	    s->nrefs) == -1)
7636 		return got_error_from_errno("asprintf");
7637 
7638 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
7639 	if (err) {
7640 		free(line);
7641 		return err;
7642 	}
7643 	if (view_needs_focus_indication(view))
7644 		wstandout(view->window);
7645 	waddwstr(view->window, wline);
7646 	if (view_needs_focus_indication(view))
7647 		wstandend(view->window);
7648 	free(wline);
7649 	wline = NULL;
7650 	free(line);
7651 	line = NULL;
7652 	if (width < view->ncols - 1)
7653 		waddch(view->window, '\n');
7654 	if (--limit <= 0)
7655 		return NULL;
7656 
7657 	n = 0;
7658 	while (re && limit > 0) {
7659 		char *line = NULL;
7660 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
7661 
7662 		if (s->show_date) {
7663 			struct got_commit_object *ci;
7664 			struct got_tag_object *tag;
7665 			struct got_object_id *id;
7666 			struct tm tm;
7667 			time_t t;
7668 
7669 			err = got_ref_resolve(&id, s->repo, re->ref);
7670 			if (err)
7671 				return err;
7672 			err = got_object_open_as_tag(&tag, s->repo, id);
7673 			if (err) {
7674 				if (err->code != GOT_ERR_OBJ_TYPE) {
7675 					free(id);
7676 					return err;
7677 				}
7678 				err = got_object_open_as_commit(&ci, s->repo,
7679 				    id);
7680 				if (err) {
7681 					free(id);
7682 					return err;
7683 				}
7684 				t = got_object_commit_get_committer_time(ci);
7685 				got_object_commit_close(ci);
7686 			} else {
7687 				t = got_object_tag_get_tagger_time(tag);
7688 				got_object_tag_close(tag);
7689 			}
7690 			free(id);
7691 			if (gmtime_r(&t, &tm) == NULL)
7692 				return got_error_from_errno("gmtime_r");
7693 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
7694 				return got_error(GOT_ERR_NO_SPACE);
7695 		}
7696 		if (got_ref_is_symbolic(re->ref)) {
7697 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
7698 			    ymd : "", got_ref_get_name(re->ref),
7699 			    got_ref_get_symref_target(re->ref)) == -1)
7700 				return got_error_from_errno("asprintf");
7701 		} else if (s->show_ids) {
7702 			struct got_object_id *id;
7703 			char *id_str;
7704 			err = got_ref_resolve(&id, s->repo, re->ref);
7705 			if (err)
7706 				return err;
7707 			err = got_object_id_str(&id_str, id);
7708 			if (err) {
7709 				free(id);
7710 				return err;
7711 			}
7712 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
7713 			    got_ref_get_name(re->ref), id_str) == -1) {
7714 				err = got_error_from_errno("asprintf");
7715 				free(id);
7716 				free(id_str);
7717 				return err;
7718 			}
7719 			free(id);
7720 			free(id_str);
7721 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
7722 		    got_ref_get_name(re->ref)) == -1)
7723 			return got_error_from_errno("asprintf");
7724 
7725 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
7726 		    0, 0);
7727 		if (err) {
7728 			free(line);
7729 			return err;
7730 		}
7731 		if (n == s->selected) {
7732 			if (view->focussed)
7733 				wstandout(view->window);
7734 			s->selected_entry = re;
7735 		}
7736 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
7737 		if (tc)
7738 			wattr_on(view->window,
7739 			    COLOR_PAIR(tc->colorpair), NULL);
7740 		waddwstr(view->window, wline);
7741 		if (tc)
7742 			wattr_off(view->window,
7743 			    COLOR_PAIR(tc->colorpair), NULL);
7744 		if (width < view->ncols - 1)
7745 			waddch(view->window, '\n');
7746 		if (n == s->selected && view->focussed)
7747 			wstandend(view->window);
7748 		free(line);
7749 		free(wline);
7750 		wline = NULL;
7751 		n++;
7752 		s->ndisplayed++;
7753 		s->last_displayed_entry = re;
7754 
7755 		limit--;
7756 		re = TAILQ_NEXT(re, entry);
7757 	}
7758 
7759 	view_border(view);
7760 	return err;
7761 }
7762 
7763 static const struct got_error *
7764 browse_ref_tree(struct tog_view **new_view, int begin_y, int begin_x,
7765     struct tog_reflist_entry *re, struct got_repository *repo)
7766 {
7767 	const struct got_error *err = NULL;
7768 	struct got_object_id *commit_id = NULL;
7769 	struct tog_view *tree_view;
7770 
7771 	*new_view = NULL;
7772 
7773 	err = resolve_reflist_entry(&commit_id, re, repo);
7774 	if (err) {
7775 		if (err->code != GOT_ERR_OBJ_TYPE)
7776 			return err;
7777 		else
7778 			return NULL;
7779 	}
7780 
7781 
7782 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
7783 	if (tree_view == NULL) {
7784 		err = got_error_from_errno("view_open");
7785 		goto done;
7786 	}
7787 
7788 	err = open_tree_view(tree_view, commit_id,
7789 	    got_ref_get_name(re->ref), repo);
7790 	if (err)
7791 		goto done;
7792 
7793 	*new_view = tree_view;
7794 done:
7795 	free(commit_id);
7796 	return err;
7797 }
7798 
7799 static const struct got_error *
7800 ref_goto_line(struct tog_view *view, int nlines)
7801 {
7802 	const struct got_error		*err = NULL;
7803 	struct tog_ref_view_state	*s = &view->state.ref;
7804 	int				 g, idx = s->selected_entry->idx;
7805 
7806 	g = view->gline;
7807 	view->gline = 0;
7808 
7809 	if (g == 0)
7810 		g = 1;
7811 	else if (g > s->nrefs)
7812 		g = s->nrefs;
7813 
7814 	if (g >= s->first_displayed_entry->idx + 1 &&
7815 	    g <= s->last_displayed_entry->idx + 1 &&
7816 	    g - s->first_displayed_entry->idx - 1 < nlines) {
7817 		s->selected = g - s->first_displayed_entry->idx - 1;
7818 		return NULL;
7819 	}
7820 
7821 	if (idx + 1 < g) {
7822 		err = ref_scroll_down(view, g - idx - 1);
7823 		if (err)
7824 			return err;
7825 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL &&
7826 		    s->first_displayed_entry->idx + s->selected < g &&
7827 		    s->selected < s->ndisplayed - 1)
7828 			s->selected = g - s->first_displayed_entry->idx - 1;
7829 	} else if (idx + 1 > g)
7830 		ref_scroll_up(s, idx - g + 1);
7831 
7832 	if (g < nlines && s->first_displayed_entry->idx == 0)
7833 		s->selected = g - 1;
7834 
7835 	return NULL;
7836 
7837 }
7838 
7839 static const struct got_error *
7840 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
7841 {
7842 	const struct got_error *err = NULL;
7843 	struct tog_ref_view_state *s = &view->state.ref;
7844 	struct tog_reflist_entry *re;
7845 	int n, nscroll = view->nlines - 1;
7846 
7847 	if (view->gline)
7848 		return ref_goto_line(view, nscroll);
7849 
7850 	switch (ch) {
7851 	case 'i':
7852 		s->show_ids = !s->show_ids;
7853 		view->count = 0;
7854 		break;
7855 	case 'm':
7856 		s->show_date = !s->show_date;
7857 		view->count = 0;
7858 		break;
7859 	case 'o':
7860 		s->sort_by_date = !s->sort_by_date;
7861 		view->count = 0;
7862 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
7863 		    got_ref_cmp_by_commit_timestamp_descending :
7864 		    tog_ref_cmp_by_name, s->repo);
7865 		if (err)
7866 			break;
7867 		got_reflist_object_id_map_free(tog_refs_idmap);
7868 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
7869 		    &tog_refs, s->repo);
7870 		if (err)
7871 			break;
7872 		ref_view_free_refs(s);
7873 		err = ref_view_load_refs(s);
7874 		break;
7875 	case KEY_ENTER:
7876 	case '\r':
7877 		view->count = 0;
7878 		if (!s->selected_entry)
7879 			break;
7880 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
7881 		break;
7882 	case 'T':
7883 		view->count = 0;
7884 		if (!s->selected_entry)
7885 			break;
7886 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
7887 		break;
7888 	case 'g':
7889 	case KEY_HOME:
7890 		s->selected = 0;
7891 		view->count = 0;
7892 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7893 		break;
7894 	case 'G':
7895 	case KEY_END: {
7896 		int eos = view->nlines - 1;
7897 
7898 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
7899 			--eos;  /* border */
7900 		s->selected = 0;
7901 		view->count = 0;
7902 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
7903 		for (n = 0; n < eos; n++) {
7904 			if (re == NULL)
7905 				break;
7906 			s->first_displayed_entry = re;
7907 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7908 		}
7909 		if (n > 0)
7910 			s->selected = n - 1;
7911 		break;
7912 	}
7913 	case 'k':
7914 	case KEY_UP:
7915 	case CTRL('p'):
7916 		if (s->selected > 0) {
7917 			s->selected--;
7918 			break;
7919 		}
7920 		ref_scroll_up(s, 1);
7921 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7922 			view->count = 0;
7923 		break;
7924 	case CTRL('u'):
7925 	case 'u':
7926 		nscroll /= 2;
7927 		/* FALL THROUGH */
7928 	case KEY_PPAGE:
7929 	case CTRL('b'):
7930 	case 'b':
7931 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7932 			s->selected -= MIN(nscroll, s->selected);
7933 		ref_scroll_up(s, MAX(0, nscroll));
7934 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7935 			view->count = 0;
7936 		break;
7937 	case 'j':
7938 	case KEY_DOWN:
7939 	case CTRL('n'):
7940 		if (s->selected < s->ndisplayed - 1) {
7941 			s->selected++;
7942 			break;
7943 		}
7944 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7945 			/* can't scroll any further */
7946 			view->count = 0;
7947 			break;
7948 		}
7949 		ref_scroll_down(view, 1);
7950 		break;
7951 	case CTRL('d'):
7952 	case 'd':
7953 		nscroll /= 2;
7954 		/* FALL THROUGH */
7955 	case KEY_NPAGE:
7956 	case CTRL('f'):
7957 	case 'f':
7958 	case ' ':
7959 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7960 			/* can't scroll any further; move cursor down */
7961 			if (s->selected < s->ndisplayed - 1)
7962 				s->selected += MIN(nscroll,
7963 				    s->ndisplayed - s->selected - 1);
7964 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7965 				s->selected += s->ndisplayed - s->selected - 1;
7966 			view->count = 0;
7967 			break;
7968 		}
7969 		ref_scroll_down(view, nscroll);
7970 		break;
7971 	case CTRL('l'):
7972 		view->count = 0;
7973 		tog_free_refs();
7974 		err = tog_load_refs(s->repo, s->sort_by_date);
7975 		if (err)
7976 			break;
7977 		ref_view_free_refs(s);
7978 		err = ref_view_load_refs(s);
7979 		break;
7980 	case KEY_RESIZE:
7981 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7982 			s->selected = view->nlines - 2;
7983 		break;
7984 	default:
7985 		view->count = 0;
7986 		break;
7987 	}
7988 
7989 	return err;
7990 }
7991 
7992 __dead static void
7993 usage_ref(void)
7994 {
7995 	endwin();
7996 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
7997 	    getprogname());
7998 	exit(1);
7999 }
8000 
8001 static const struct got_error *
8002 cmd_ref(int argc, char *argv[])
8003 {
8004 	const struct got_error *error;
8005 	struct got_repository *repo = NULL;
8006 	struct got_worktree *worktree = NULL;
8007 	char *cwd = NULL, *repo_path = NULL;
8008 	int ch;
8009 	struct tog_view *view;
8010 	int *pack_fds = NULL;
8011 
8012 	while ((ch = getopt(argc, argv, "r:")) != -1) {
8013 		switch (ch) {
8014 		case 'r':
8015 			repo_path = realpath(optarg, NULL);
8016 			if (repo_path == NULL)
8017 				return got_error_from_errno2("realpath",
8018 				    optarg);
8019 			break;
8020 		default:
8021 			usage_ref();
8022 			/* NOTREACHED */
8023 		}
8024 	}
8025 
8026 	argc -= optind;
8027 	argv += optind;
8028 
8029 	if (argc > 1)
8030 		usage_ref();
8031 
8032 	error = got_repo_pack_fds_open(&pack_fds);
8033 	if (error != NULL)
8034 		goto done;
8035 
8036 	if (repo_path == NULL) {
8037 		cwd = getcwd(NULL, 0);
8038 		if (cwd == NULL)
8039 			return got_error_from_errno("getcwd");
8040 		error = got_worktree_open(&worktree, cwd);
8041 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
8042 			goto done;
8043 		if (worktree)
8044 			repo_path =
8045 			    strdup(got_worktree_get_repo_path(worktree));
8046 		else
8047 			repo_path = strdup(cwd);
8048 		if (repo_path == NULL) {
8049 			error = got_error_from_errno("strdup");
8050 			goto done;
8051 		}
8052 	}
8053 
8054 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8055 	if (error != NULL)
8056 		goto done;
8057 
8058 	init_curses();
8059 
8060 	error = apply_unveil(got_repo_get_path(repo), NULL);
8061 	if (error)
8062 		goto done;
8063 
8064 	error = tog_load_refs(repo, 0);
8065 	if (error)
8066 		goto done;
8067 
8068 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
8069 	if (view == NULL) {
8070 		error = got_error_from_errno("view_open");
8071 		goto done;
8072 	}
8073 
8074 	error = open_ref_view(view, repo);
8075 	if (error)
8076 		goto done;
8077 
8078 	if (worktree) {
8079 		/* Release work tree lock. */
8080 		got_worktree_close(worktree);
8081 		worktree = NULL;
8082 	}
8083 	error = view_loop(view);
8084 done:
8085 	free(repo_path);
8086 	free(cwd);
8087 	if (repo) {
8088 		const struct got_error *close_err = got_repo_close(repo);
8089 		if (close_err)
8090 			error = close_err;
8091 	}
8092 	if (pack_fds) {
8093 		const struct got_error *pack_err =
8094 		    got_repo_pack_fds_close(pack_fds);
8095 		if (error == NULL)
8096 			error = pack_err;
8097 	}
8098 	tog_free_refs();
8099 	return error;
8100 }
8101 
8102 static const struct got_error *
8103 view_dispatch_request(struct tog_view **new_view, struct tog_view *view,
8104     enum tog_view_type request, int y, int x)
8105 {
8106 	const struct got_error *err = NULL;
8107 
8108 	*new_view = NULL;
8109 
8110 	switch (request) {
8111 	case TOG_VIEW_DIFF:
8112 		if (view->type == TOG_VIEW_LOG) {
8113 			struct tog_log_view_state *s = &view->state.log;
8114 
8115 			err = open_diff_view_for_commit(new_view, y, x,
8116 			    s->selected_entry->commit, s->selected_entry->id,
8117 			    view, s->repo);
8118 		} else
8119 			return got_error_msg(GOT_ERR_NOT_IMPL,
8120 			    "parent/child view pair not supported");
8121 		break;
8122 	case TOG_VIEW_BLAME:
8123 		if (view->type == TOG_VIEW_TREE) {
8124 			struct tog_tree_view_state *s = &view->state.tree;
8125 
8126 			err = blame_tree_entry(new_view, y, x,
8127 			    s->selected_entry, &s->parents, s->commit_id,
8128 			    s->repo);
8129 		} else
8130 			return got_error_msg(GOT_ERR_NOT_IMPL,
8131 			    "parent/child view pair not supported");
8132 		break;
8133 	case TOG_VIEW_LOG:
8134 		if (view->type == TOG_VIEW_BLAME)
8135 			err = log_annotated_line(new_view, y, x,
8136 			    view->state.blame.repo, view->state.blame.id_to_log);
8137 		else if (view->type == TOG_VIEW_TREE)
8138 			err = log_selected_tree_entry(new_view, y, x,
8139 			    &view->state.tree);
8140 		else if (view->type == TOG_VIEW_REF)
8141 			err = log_ref_entry(new_view, y, x,
8142 			    view->state.ref.selected_entry,
8143 			    view->state.ref.repo);
8144 		else
8145 			return got_error_msg(GOT_ERR_NOT_IMPL,
8146 			    "parent/child view pair not supported");
8147 		break;
8148 	case TOG_VIEW_TREE:
8149 		if (view->type == TOG_VIEW_LOG)
8150 			err = browse_commit_tree(new_view, y, x,
8151 			    view->state.log.selected_entry,
8152 			    view->state.log.in_repo_path,
8153 			    view->state.log.head_ref_name,
8154 			    view->state.log.repo);
8155 		else if (view->type == TOG_VIEW_REF)
8156 			err = browse_ref_tree(new_view, y, x,
8157 			    view->state.ref.selected_entry,
8158 			    view->state.ref.repo);
8159 		else
8160 			return got_error_msg(GOT_ERR_NOT_IMPL,
8161 			    "parent/child view pair not supported");
8162 		break;
8163 	case TOG_VIEW_REF:
8164 		*new_view = view_open(0, 0, y, x, TOG_VIEW_REF);
8165 		if (*new_view == NULL)
8166 			return got_error_from_errno("view_open");
8167 		if (view->type == TOG_VIEW_LOG)
8168 			err = open_ref_view(*new_view, view->state.log.repo);
8169 		else if (view->type == TOG_VIEW_TREE)
8170 			err = open_ref_view(*new_view, view->state.tree.repo);
8171 		else
8172 			err = got_error_msg(GOT_ERR_NOT_IMPL,
8173 			    "parent/child view pair not supported");
8174 		if (err)
8175 			view_close(*new_view);
8176 		break;
8177 	default:
8178 		return got_error_msg(GOT_ERR_NOT_IMPL, "invalid view");
8179 	}
8180 
8181 	return err;
8182 }
8183 
8184 /*
8185  * If view was scrolled down to move the selected line into view when opening a
8186  * horizontal split, scroll back up when closing the split/toggling fullscreen.
8187  */
8188 static void
8189 offset_selection_up(struct tog_view *view)
8190 {
8191 	switch (view->type) {
8192 	case TOG_VIEW_BLAME: {
8193 		struct tog_blame_view_state *s = &view->state.blame;
8194 		if (s->first_displayed_line == 1) {
8195 			s->selected_line = MAX(s->selected_line - view->offset,
8196 			    1);
8197 			break;
8198 		}
8199 		if (s->first_displayed_line > view->offset)
8200 			s->first_displayed_line -= view->offset;
8201 		else
8202 			s->first_displayed_line = 1;
8203 		s->selected_line += view->offset;
8204 		break;
8205 	}
8206 	case TOG_VIEW_LOG:
8207 		log_scroll_up(&view->state.log, view->offset);
8208 		view->state.log.selected += view->offset;
8209 		break;
8210 	case TOG_VIEW_REF:
8211 		ref_scroll_up(&view->state.ref, view->offset);
8212 		view->state.ref.selected += view->offset;
8213 		break;
8214 	case TOG_VIEW_TREE:
8215 		tree_scroll_up(&view->state.tree, view->offset);
8216 		view->state.tree.selected += view->offset;
8217 		break;
8218 	default:
8219 		break;
8220 	}
8221 
8222 	view->offset = 0;
8223 }
8224 
8225 /*
8226  * If the selected line is in the section of screen covered by the bottom split,
8227  * scroll down offset lines to move it into view and index its new position.
8228  */
8229 static const struct got_error *
8230 offset_selection_down(struct tog_view *view)
8231 {
8232 	const struct got_error	*err = NULL;
8233 	const struct got_error	*(*scrolld)(struct tog_view *, int);
8234 	int			*selected = NULL;
8235 	int			 header, offset;
8236 
8237 	switch (view->type) {
8238 	case TOG_VIEW_BLAME: {
8239 		struct tog_blame_view_state *s = &view->state.blame;
8240 		header = 3;
8241 		scrolld = NULL;
8242 		if (s->selected_line > view->nlines - header) {
8243 			offset = abs(view->nlines - s->selected_line - header);
8244 			s->first_displayed_line += offset;
8245 			s->selected_line -= offset;
8246 			view->offset = offset;
8247 		}
8248 		break;
8249 	}
8250 	case TOG_VIEW_LOG: {
8251 		struct tog_log_view_state *s = &view->state.log;
8252 		scrolld = &log_scroll_down;
8253 		header = view_is_parent_view(view) ? 3 : 2;
8254 		selected = &s->selected;
8255 		break;
8256 	}
8257 	case TOG_VIEW_REF: {
8258 		struct tog_ref_view_state *s = &view->state.ref;
8259 		scrolld = &ref_scroll_down;
8260 		header = 3;
8261 		selected = &s->selected;
8262 		break;
8263 	}
8264 	case TOG_VIEW_TREE: {
8265 		struct tog_tree_view_state *s = &view->state.tree;
8266 		scrolld = &tree_scroll_down;
8267 		header = 5;
8268 		selected = &s->selected;
8269 		break;
8270 	}
8271 	default:
8272 		selected = NULL;
8273 		scrolld = NULL;
8274 		header = 0;
8275 		break;
8276 	}
8277 
8278 	if (selected && *selected > view->nlines - header) {
8279 		offset = abs(view->nlines - *selected - header);
8280 		view->offset = offset;
8281 		if (scrolld && offset) {
8282 			err = scrolld(view, offset);
8283 			*selected -= offset;
8284 		}
8285 	}
8286 
8287 	return err;
8288 }
8289 
8290 static void
8291 list_commands(FILE *fp)
8292 {
8293 	size_t i;
8294 
8295 	fprintf(fp, "commands:");
8296 	for (i = 0; i < nitems(tog_commands); i++) {
8297 		const struct tog_cmd *cmd = &tog_commands[i];
8298 		fprintf(fp, " %s", cmd->name);
8299 	}
8300 	fputc('\n', fp);
8301 }
8302 
8303 __dead static void
8304 usage(int hflag, int status)
8305 {
8306 	FILE *fp = (status == 0) ? stdout : stderr;
8307 
8308 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
8309 	    getprogname());
8310 	if (hflag) {
8311 		fprintf(fp, "lazy usage: %s path\n", getprogname());
8312 		list_commands(fp);
8313 	}
8314 	exit(status);
8315 }
8316 
8317 static char **
8318 make_argv(int argc, ...)
8319 {
8320 	va_list ap;
8321 	char **argv;
8322 	int i;
8323 
8324 	va_start(ap, argc);
8325 
8326 	argv = calloc(argc, sizeof(char *));
8327 	if (argv == NULL)
8328 		err(1, "calloc");
8329 	for (i = 0; i < argc; i++) {
8330 		argv[i] = strdup(va_arg(ap, char *));
8331 		if (argv[i] == NULL)
8332 			err(1, "strdup");
8333 	}
8334 
8335 	va_end(ap);
8336 	return argv;
8337 }
8338 
8339 /*
8340  * Try to convert 'tog path' into a 'tog log path' command.
8341  * The user could simply have mistyped the command rather than knowingly
8342  * provided a path. So check whether argv[0] can in fact be resolved
8343  * to a path in the HEAD commit and print a special error if not.
8344  * This hack is for mpi@ <3
8345  */
8346 static const struct got_error *
8347 tog_log_with_path(int argc, char *argv[])
8348 {
8349 	const struct got_error *error = NULL, *close_err;
8350 	const struct tog_cmd *cmd = NULL;
8351 	struct got_repository *repo = NULL;
8352 	struct got_worktree *worktree = NULL;
8353 	struct got_object_id *commit_id = NULL, *id = NULL;
8354 	struct got_commit_object *commit = NULL;
8355 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
8356 	char *commit_id_str = NULL, **cmd_argv = NULL;
8357 	int *pack_fds = NULL;
8358 
8359 	cwd = getcwd(NULL, 0);
8360 	if (cwd == NULL)
8361 		return got_error_from_errno("getcwd");
8362 
8363 	error = got_repo_pack_fds_open(&pack_fds);
8364 	if (error != NULL)
8365 		goto done;
8366 
8367 	error = got_worktree_open(&worktree, cwd);
8368 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
8369 		goto done;
8370 
8371 	if (worktree)
8372 		repo_path = strdup(got_worktree_get_repo_path(worktree));
8373 	else
8374 		repo_path = strdup(cwd);
8375 	if (repo_path == NULL) {
8376 		error = got_error_from_errno("strdup");
8377 		goto done;
8378 	}
8379 
8380 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8381 	if (error != NULL)
8382 		goto done;
8383 
8384 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
8385 	    repo, worktree);
8386 	if (error)
8387 		goto done;
8388 
8389 	error = tog_load_refs(repo, 0);
8390 	if (error)
8391 		goto done;
8392 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
8393 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
8394 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
8395 	if (error)
8396 		goto done;
8397 
8398 	if (worktree) {
8399 		got_worktree_close(worktree);
8400 		worktree = NULL;
8401 	}
8402 
8403 	error = got_object_open_as_commit(&commit, repo, commit_id);
8404 	if (error)
8405 		goto done;
8406 
8407 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
8408 	if (error) {
8409 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
8410 			goto done;
8411 		fprintf(stderr, "%s: '%s' is no known command or path\n",
8412 		    getprogname(), argv[0]);
8413 		usage(1, 1);
8414 		/* not reached */
8415 	}
8416 
8417 	error = got_object_id_str(&commit_id_str, commit_id);
8418 	if (error)
8419 		goto done;
8420 
8421 	cmd = &tog_commands[0]; /* log */
8422 	argc = 4;
8423 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
8424 	error = cmd->cmd_main(argc, cmd_argv);
8425 done:
8426 	if (repo) {
8427 		close_err = got_repo_close(repo);
8428 		if (error == NULL)
8429 			error = close_err;
8430 	}
8431 	if (commit)
8432 		got_object_commit_close(commit);
8433 	if (worktree)
8434 		got_worktree_close(worktree);
8435 	if (pack_fds) {
8436 		const struct got_error *pack_err =
8437 		    got_repo_pack_fds_close(pack_fds);
8438 		if (error == NULL)
8439 			error = pack_err;
8440 	}
8441 	free(id);
8442 	free(commit_id_str);
8443 	free(commit_id);
8444 	free(cwd);
8445 	free(repo_path);
8446 	free(in_repo_path);
8447 	if (cmd_argv) {
8448 		int i;
8449 		for (i = 0; i < argc; i++)
8450 			free(cmd_argv[i]);
8451 		free(cmd_argv);
8452 	}
8453 	tog_free_refs();
8454 	return error;
8455 }
8456 
8457 int
8458 main(int argc, char *argv[])
8459 {
8460 	const struct got_error *error = NULL;
8461 	const struct tog_cmd *cmd = NULL;
8462 	int ch, hflag = 0, Vflag = 0;
8463 	char **cmd_argv = NULL;
8464 	static const struct option longopts[] = {
8465 	    { "version", no_argument, NULL, 'V' },
8466 	    { NULL, 0, NULL, 0}
8467 	};
8468 	char *diff_algo_str = NULL;
8469 
8470 	setlocale(LC_CTYPE, "");
8471 
8472 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
8473 		switch (ch) {
8474 		case 'h':
8475 			hflag = 1;
8476 			break;
8477 		case 'V':
8478 			Vflag = 1;
8479 			break;
8480 		default:
8481 			usage(hflag, 1);
8482 			/* NOTREACHED */
8483 		}
8484 	}
8485 
8486 	argc -= optind;
8487 	argv += optind;
8488 	optind = 1;
8489 	optreset = 1;
8490 
8491 	if (Vflag) {
8492 		got_version_print_str();
8493 		return 0;
8494 	}
8495 
8496 #ifndef PROFILE
8497 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
8498 	    NULL) == -1)
8499 		err(1, "pledge");
8500 #endif
8501 
8502 	if (argc == 0) {
8503 		if (hflag)
8504 			usage(hflag, 0);
8505 		/* Build an argument vector which runs a default command. */
8506 		cmd = &tog_commands[0];
8507 		argc = 1;
8508 		cmd_argv = make_argv(argc, cmd->name);
8509 	} else {
8510 		size_t i;
8511 
8512 		/* Did the user specify a command? */
8513 		for (i = 0; i < nitems(tog_commands); i++) {
8514 			if (strncmp(tog_commands[i].name, argv[0],
8515 			    strlen(argv[0])) == 0) {
8516 				cmd = &tog_commands[i];
8517 				break;
8518 			}
8519 		}
8520 	}
8521 
8522 	diff_algo_str = getenv("TOG_DIFF_ALGORITHM");
8523 	if (diff_algo_str) {
8524 		if (strcasecmp(diff_algo_str, "patience") == 0)
8525 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
8526 		if (strcasecmp(diff_algo_str, "myers") == 0)
8527 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
8528 	}
8529 
8530 	if (cmd == NULL) {
8531 		if (argc != 1)
8532 			usage(0, 1);
8533 		/* No command specified; try log with a path */
8534 		error = tog_log_with_path(argc, argv);
8535 	} else {
8536 		if (hflag)
8537 			cmd->cmd_usage();
8538 		else
8539 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
8540 	}
8541 
8542 	endwin();
8543 	putchar('\n');
8544 	if (cmd_argv) {
8545 		int i;
8546 		for (i = 0; i < argc; i++)
8547 			free(cmd_argv[i]);
8548 		free(cmd_argv);
8549 	}
8550 
8551 	if (error && error->code != GOT_ERR_CANCELLED)
8552 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
8553 	return 0;
8554 }