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