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