1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #define _XOPEN_SOURCE_EXTENDED
24 #include <curses.h>
25 #undef _XOPEN_SOURCE_EXTENDED
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 <util.h>
37 #include <limits.h>
38 #include <wchar.h>
39 #include <time.h>
40 #include <pthread.h>
41 #include <libgen.h>
42 #include <regex.h>
43 
44 #include "got_version.h"
45 #include "got_error.h"
46 #include "got_object.h"
47 #include "got_reference.h"
48 #include "got_repository.h"
49 #include "got_diff.h"
50 #include "got_opentemp.h"
51 #include "got_utf8.h"
52 #include "got_cancel.h"
53 #include "got_commit_graph.h"
54 #include "got_blame.h"
55 #include "got_privsep.h"
56 #include "got_path.h"
57 #include "got_worktree.h"
58 
59 #ifndef MIN
60 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
61 #endif
62 
63 #ifndef MAX
64 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
65 #endif
66 
67 #define CTRL(x)		((x) & 0x1f)
68 
69 #ifndef nitems
70 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
71 #endif
72 
73 struct tog_cmd {
74 	const char *name;
75 	const struct got_error *(*cmd_main)(int, char *[]);
76 	void (*cmd_usage)(void);
77 };
78 
79 __dead static void	usage(int, int);
80 __dead static void	usage_log(void);
81 __dead static void	usage_diff(void);
82 __dead static void	usage_blame(void);
83 __dead static void	usage_tree(void);
84 __dead static void	usage_ref(void);
85 
86 static const struct got_error*	cmd_log(int, char *[]);
87 static const struct got_error*	cmd_diff(int, char *[]);
88 static const struct got_error*	cmd_blame(int, char *[]);
89 static const struct got_error*	cmd_tree(int, char *[]);
90 static const struct got_error*	cmd_ref(int, char *[]);
91 
92 static struct tog_cmd tog_commands[] = {
93 	{ "log",	cmd_log,	usage_log },
94 	{ "diff",	cmd_diff,	usage_diff },
95 	{ "blame",	cmd_blame,	usage_blame },
96 	{ "tree",	cmd_tree,	usage_tree },
97 	{ "ref",	cmd_ref,	usage_ref },
98 };
99 
100 enum tog_view_type {
101 	TOG_VIEW_DIFF,
102 	TOG_VIEW_LOG,
103 	TOG_VIEW_BLAME,
104 	TOG_VIEW_TREE,
105 	TOG_VIEW_REF,
106 };
107 
108 #define TOG_EOF_STRING	"(END)"
109 
110 struct commit_queue_entry {
111 	TAILQ_ENTRY(commit_queue_entry) entry;
112 	struct got_object_id *id;
113 	struct got_commit_object *commit;
114 	int idx;
115 };
116 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
117 struct commit_queue {
118 	int ncommits;
119 	struct commit_queue_head head;
120 };
121 
122 struct tog_color {
123 	SIMPLEQ_ENTRY(tog_color) entry;
124 	regex_t regex;
125 	short colorpair;
126 };
127 SIMPLEQ_HEAD(tog_colors, tog_color);
128 
129 static const struct got_error *
130 add_color(struct tog_colors *colors, const char *pattern,
131     int idx, short color)
132 {
133 	const struct got_error *err = NULL;
134 	struct tog_color *tc;
135 	int regerr = 0;
136 
137 	if (idx < 1 || idx > COLOR_PAIRS - 1)
138 		return NULL;
139 
140 	init_pair(idx, color, -1);
141 
142 	tc = calloc(1, sizeof(*tc));
143 	if (tc == NULL)
144 		return got_error_from_errno("calloc");
145 	regerr = regcomp(&tc->regex, pattern,
146 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
147 	if (regerr) {
148 		static char regerr_msg[512];
149 		static char err_msg[512];
150 		regerror(regerr, &tc->regex, regerr_msg,
151 		    sizeof(regerr_msg));
152 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
153 		    regerr_msg);
154 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
155 		free(tc);
156 		return err;
157 	}
158 	tc->colorpair = idx;
159 	SIMPLEQ_INSERT_HEAD(colors, tc, entry);
160 	return NULL;
161 }
162 
163 static void
164 free_colors(struct tog_colors *colors)
165 {
166 	struct tog_color *tc;
167 
168 	while (!SIMPLEQ_EMPTY(colors)) {
169 		tc = SIMPLEQ_FIRST(colors);
170 		SIMPLEQ_REMOVE_HEAD(colors, entry);
171 		regfree(&tc->regex);
172 		free(tc);
173 	}
174 }
175 
176 struct tog_color *
177 get_color(struct tog_colors *colors, int colorpair)
178 {
179 	struct tog_color *tc = NULL;
180 
181 	SIMPLEQ_FOREACH(tc, colors, entry) {
182 		if (tc->colorpair == colorpair)
183 			return tc;
184 	}
185 
186 	return NULL;
187 }
188 
189 static int
190 default_color_value(const char *envvar)
191 {
192 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
193 		return COLOR_MAGENTA;
194 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
195 		return COLOR_CYAN;
196 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
197 		return COLOR_YELLOW;
198 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
199 		return COLOR_GREEN;
200 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
201 		return COLOR_MAGENTA;
202 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
203 		return COLOR_MAGENTA;
204 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
205 		return COLOR_CYAN;
206 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
207 		return COLOR_GREEN;
208 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
209 		return COLOR_GREEN;
210 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
211 		return COLOR_CYAN;
212 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
213 		return COLOR_YELLOW;
214 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
215 		return COLOR_GREEN;
216 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
217 		return COLOR_MAGENTA;
218 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
219 		return COLOR_YELLOW;
220 
221 	return -1;
222 }
223 
224 static int
225 get_color_value(const char *envvar)
226 {
227 	const char *val = getenv(envvar);
228 
229 	if (val == NULL)
230 		return default_color_value(envvar);
231 
232 	if (strcasecmp(val, "black") == 0)
233 		return COLOR_BLACK;
234 	if (strcasecmp(val, "red") == 0)
235 		return COLOR_RED;
236 	if (strcasecmp(val, "green") == 0)
237 		return COLOR_GREEN;
238 	if (strcasecmp(val, "yellow") == 0)
239 		return COLOR_YELLOW;
240 	if (strcasecmp(val, "blue") == 0)
241 		return COLOR_BLUE;
242 	if (strcasecmp(val, "magenta") == 0)
243 		return COLOR_MAGENTA;
244 	if (strcasecmp(val, "cyan") == 0)
245 		return COLOR_CYAN;
246 	if (strcasecmp(val, "white") == 0)
247 		return COLOR_WHITE;
248 	if (strcasecmp(val, "default") == 0)
249 		return -1;
250 
251 	return default_color_value(envvar);
252 }
253 
254 
255 struct tog_diff_view_state {
256 	struct got_object_id *id1, *id2;
257 	const char *label1, *label2;
258 	FILE *f;
259 	int first_displayed_line;
260 	int last_displayed_line;
261 	int eof;
262 	int diff_context;
263 	int ignore_whitespace;
264 	int force_text_diff;
265 	struct got_repository *repo;
266 	struct got_reflist_head refs;
267 	struct tog_colors colors;
268 	size_t nlines;
269 	off_t *line_offsets;
270 	int matched_line;
271 	int selected_line;
272 
273 	/* passed from log view; may be NULL */
274 	struct tog_view *log_view;
275 };
276 
277 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
278 
279 struct tog_log_thread_args {
280 	pthread_cond_t need_commits;
281 	pthread_cond_t commit_loaded;
282 	int commits_needed;
283 	struct got_commit_graph *graph;
284 	struct commit_queue *commits;
285 	const char *in_repo_path;
286 	struct got_object_id *start_id;
287 	struct got_repository *repo;
288 	int log_complete;
289 	sig_atomic_t *quit;
290 	struct commit_queue_entry **first_displayed_entry;
291 	struct commit_queue_entry **selected_entry;
292 	int *searching;
293 	int *search_next_done;
294 	regex_t *regex;
295 };
296 
297 struct tog_log_view_state {
298 	struct commit_queue commits;
299 	struct commit_queue_entry *first_displayed_entry;
300 	struct commit_queue_entry *last_displayed_entry;
301 	struct commit_queue_entry *selected_entry;
302 	int selected;
303 	char *in_repo_path;
304 	const char *head_ref_name;
305 	int log_branches;
306 	struct got_repository *repo;
307 	struct got_reflist_head refs;
308 	struct got_object_id *start_id;
309 	sig_atomic_t quit;
310 	pthread_t thread;
311 	struct tog_log_thread_args thread_args;
312 	struct commit_queue_entry *matched_entry;
313 	struct commit_queue_entry *search_entry;
314 	struct tog_colors colors;
315 };
316 
317 #define TOG_COLOR_DIFF_MINUS		1
318 #define TOG_COLOR_DIFF_PLUS		2
319 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
320 #define TOG_COLOR_DIFF_META		4
321 #define TOG_COLOR_TREE_SUBMODULE	5
322 #define TOG_COLOR_TREE_SYMLINK		6
323 #define TOG_COLOR_TREE_DIRECTORY	7
324 #define TOG_COLOR_TREE_EXECUTABLE	8
325 #define TOG_COLOR_COMMIT		9
326 #define TOG_COLOR_AUTHOR		10
327 #define TOG_COLOR_DATE		11
328 #define TOG_COLOR_REFS_HEADS		12
329 #define TOG_COLOR_REFS_TAGS		13
330 #define TOG_COLOR_REFS_REMOTES		14
331 
332 struct tog_blame_cb_args {
333 	struct tog_blame_line *lines; /* one per line */
334 	int nlines;
335 
336 	struct tog_view *view;
337 	struct got_object_id *commit_id;
338 	int *quit;
339 };
340 
341 struct tog_blame_thread_args {
342 	const char *path;
343 	struct got_repository *repo;
344 	struct tog_blame_cb_args *cb_args;
345 	int *complete;
346 	got_cancel_cb cancel_cb;
347 	void *cancel_arg;
348 };
349 
350 struct tog_blame {
351 	FILE *f;
352 	off_t filesize;
353 	struct tog_blame_line *lines;
354 	int nlines;
355 	off_t *line_offsets;
356 	pthread_t thread;
357 	struct tog_blame_thread_args thread_args;
358 	struct tog_blame_cb_args cb_args;
359 	const char *path;
360 };
361 
362 struct tog_blame_view_state {
363 	int first_displayed_line;
364 	int last_displayed_line;
365 	int selected_line;
366 	int blame_complete;
367 	int eof;
368 	int done;
369 	struct got_object_id_queue blamed_commits;
370 	struct got_object_qid *blamed_commit;
371 	char *path;
372 	struct got_repository *repo;
373 	struct got_object_id *commit_id;
374 	struct tog_blame blame;
375 	int matched_line;
376 	struct tog_colors colors;
377 };
378 
379 struct tog_parent_tree {
380 	TAILQ_ENTRY(tog_parent_tree) entry;
381 	struct got_tree_object *tree;
382 	struct got_tree_entry *first_displayed_entry;
383 	struct got_tree_entry *selected_entry;
384 	int selected;
385 };
386 
387 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
388 
389 struct tog_tree_view_state {
390 	char *tree_label;
391 	struct got_tree_object *root;
392 	struct got_tree_object *tree;
393 	struct got_tree_entry *first_displayed_entry;
394 	struct got_tree_entry *last_displayed_entry;
395 	struct got_tree_entry *selected_entry;
396 	int ndisplayed, selected, show_ids;
397 	struct tog_parent_trees parents;
398 	struct got_object_id *commit_id;
399 	struct got_repository *repo;
400 	struct got_tree_entry *matched_entry;
401 	struct tog_colors colors;
402 };
403 
404 struct tog_reflist_entry {
405 	TAILQ_ENTRY(tog_reflist_entry) entry;
406 	struct got_reference *ref;
407 	int idx;
408 };
409 
410 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
411 
412 struct tog_ref_view_state {
413 	struct got_reflist_head simplerefs; /* SIMPLEQ */
414 	struct tog_reflist_head refs;	/* TAILQ */
415 	struct tog_reflist_entry *first_displayed_entry;
416 	struct tog_reflist_entry *last_displayed_entry;
417 	struct tog_reflist_entry *selected_entry;
418 	int nrefs, ndisplayed, selected, show_ids;
419 	struct got_repository *repo;
420 	struct tog_reflist_entry *matched_entry;
421 	struct tog_colors colors;
422 };
423 
424 /*
425  * We implement two types of views: parent views and child views.
426  *
427  * The 'Tab' key switches between a parent view and its child view.
428  * Child views are shown side-by-side to their parent view, provided
429  * there is enough screen estate.
430  *
431  * When a new view is opened from within a parent view, this new view
432  * becomes a child view of the parent view, replacing any existing child.
433  *
434  * When a new view is opened from within a child view, this new view
435  * becomes a parent view which will obscure the views below until the
436  * user quits the new parent view by typing 'q'.
437  *
438  * This list of views contains parent views only.
439  * Child views are only pointed to by their parent view.
440  */
441 TAILQ_HEAD(tog_view_list_head, tog_view);
442 
443 struct tog_view {
444 	TAILQ_ENTRY(tog_view) entry;
445 	WINDOW *window;
446 	PANEL *panel;
447 	int nlines, ncols, begin_y, begin_x;
448 	int lines, cols; /* copies of LINES and COLS */
449 	int focussed;
450 	struct tog_view *parent;
451 	struct tog_view *child;
452 	int child_focussed;
453 
454 	/* type-specific state */
455 	enum tog_view_type type;
456 	union {
457 		struct tog_diff_view_state diff;
458 		struct tog_log_view_state log;
459 		struct tog_blame_view_state blame;
460 		struct tog_tree_view_state tree;
461 		struct tog_ref_view_state ref;
462 	} state;
463 
464 	const struct got_error *(*show)(struct tog_view *);
465 	const struct got_error *(*input)(struct tog_view **,
466 	    struct tog_view **, struct tog_view**, struct tog_view *, int);
467 	const struct got_error *(*close)(struct tog_view *);
468 
469 	const struct got_error *(*search_start)(struct tog_view *);
470 	const struct got_error *(*search_next)(struct tog_view *);
471 	int searching;
472 #define TOG_SEARCH_FORWARD	1
473 #define TOG_SEARCH_BACKWARD	2
474 	int search_next_done;
475 #define TOG_SEARCH_HAVE_MORE	1
476 #define TOG_SEARCH_NO_MORE	2
477 #define TOG_SEARCH_HAVE_NONE	3
478 	regex_t regex;
479 	regmatch_t regmatch;
480 };
481 
482 static const struct got_error *open_diff_view(struct tog_view *,
483     struct got_object_id *, struct got_object_id *,
484     const char *, const char *, int, int, int, struct tog_view *,
485     struct got_repository *);
486 static const struct got_error *show_diff_view(struct tog_view *);
487 static const struct got_error *input_diff_view(struct tog_view **,
488     struct tog_view **, struct tog_view **, struct tog_view *, int);
489 static const struct got_error* close_diff_view(struct tog_view *);
490 static const struct got_error *search_start_diff_view(struct tog_view *);
491 static const struct got_error *search_next_diff_view(struct tog_view *);
492 
493 static const struct got_error *open_log_view(struct tog_view *,
494     struct got_object_id *, struct got_repository *,
495     const char *, const char *, int);
496 static const struct got_error * show_log_view(struct tog_view *);
497 static const struct got_error *input_log_view(struct tog_view **,
498     struct tog_view **, struct tog_view **, struct tog_view *, int);
499 static const struct got_error *close_log_view(struct tog_view *);
500 static const struct got_error *search_start_log_view(struct tog_view *);
501 static const struct got_error *search_next_log_view(struct tog_view *);
502 
503 static const struct got_error *open_blame_view(struct tog_view *, char *,
504     struct got_object_id *, struct got_repository *);
505 static const struct got_error *show_blame_view(struct tog_view *);
506 static const struct got_error *input_blame_view(struct tog_view **,
507     struct tog_view **, struct tog_view **, struct tog_view *, int);
508 static const struct got_error *close_blame_view(struct tog_view *);
509 static const struct got_error *search_start_blame_view(struct tog_view *);
510 static const struct got_error *search_next_blame_view(struct tog_view *);
511 
512 static const struct got_error *open_tree_view(struct tog_view *,
513     struct got_tree_object *, struct got_object_id *, struct got_repository *);
514 static const struct got_error *show_tree_view(struct tog_view *);
515 static const struct got_error *input_tree_view(struct tog_view **,
516     struct tog_view **, struct tog_view **, struct tog_view *, int);
517 static const struct got_error *close_tree_view(struct tog_view *);
518 static const struct got_error *search_start_tree_view(struct tog_view *);
519 static const struct got_error *search_next_tree_view(struct tog_view *);
520 
521 static const struct got_error *open_ref_view(struct tog_view *,
522     struct got_repository *);
523 static const struct got_error *show_ref_view(struct tog_view *);
524 static const struct got_error *input_ref_view(struct tog_view **,
525     struct tog_view **, struct tog_view **, struct tog_view *, int);
526 static const struct got_error *close_ref_view(struct tog_view *);
527 static const struct got_error *search_start_ref_view(struct tog_view *);
528 static const struct got_error *search_next_ref_view(struct tog_view *);
529 
530 static volatile sig_atomic_t tog_sigwinch_received;
531 static volatile sig_atomic_t tog_sigpipe_received;
532 static volatile sig_atomic_t tog_sigcont_received;
533 
534 static void
535 tog_sigwinch(int signo)
536 {
537 	tog_sigwinch_received = 1;
538 }
539 
540 static void
541 tog_sigpipe(int signo)
542 {
543 	tog_sigpipe_received = 1;
544 }
545 
546 static void
547 tog_sigcont(int signo)
548 {
549 	tog_sigcont_received = 1;
550 }
551 
552 static const struct got_error *
553 view_close(struct tog_view *view)
554 {
555 	const struct got_error *err = NULL;
556 
557 	if (view->child) {
558 		view_close(view->child);
559 		view->child = NULL;
560 	}
561 	if (view->close)
562 		err = view->close(view);
563 	if (view->panel)
564 		del_panel(view->panel);
565 	if (view->window)
566 		delwin(view->window);
567 	free(view);
568 	return err;
569 }
570 
571 static struct tog_view *
572 view_open(int nlines, int ncols, int begin_y, int begin_x,
573     enum tog_view_type type)
574 {
575 	struct tog_view *view = calloc(1, sizeof(*view));
576 
577 	if (view == NULL)
578 		return NULL;
579 
580 	view->type = type;
581 	view->lines = LINES;
582 	view->cols = COLS;
583 	view->nlines = nlines ? nlines : LINES - begin_y;
584 	view->ncols = ncols ? ncols : COLS - begin_x;
585 	view->begin_y = begin_y;
586 	view->begin_x = begin_x;
587 	view->window = newwin(nlines, ncols, begin_y, begin_x);
588 	if (view->window == NULL) {
589 		view_close(view);
590 		return NULL;
591 	}
592 	view->panel = new_panel(view->window);
593 	if (view->panel == NULL ||
594 	    set_panel_userptr(view->panel, view) != OK) {
595 		view_close(view);
596 		return NULL;
597 	}
598 
599 	keypad(view->window, TRUE);
600 	return view;
601 }
602 
603 static int
604 view_split_begin_x(int begin_x)
605 {
606 	if (begin_x > 0 || COLS < 120)
607 		return 0;
608 	return (COLS - MAX(COLS / 2, 80));
609 }
610 
611 static const struct got_error *view_resize(struct tog_view *);
612 
613 static const struct got_error *
614 view_splitscreen(struct tog_view *view)
615 {
616 	const struct got_error *err = NULL;
617 
618 	view->begin_y = 0;
619 	view->begin_x = view_split_begin_x(0);
620 	view->nlines = LINES;
621 	view->ncols = COLS - view->begin_x;
622 	view->lines = LINES;
623 	view->cols = COLS;
624 	err = view_resize(view);
625 	if (err)
626 		return err;
627 
628 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
629 		return got_error_from_errno("mvwin");
630 
631 	return NULL;
632 }
633 
634 static const struct got_error *
635 view_fullscreen(struct tog_view *view)
636 {
637 	const struct got_error *err = NULL;
638 
639 	view->begin_x = 0;
640 	view->begin_y = 0;
641 	view->nlines = LINES;
642 	view->ncols = COLS;
643 	view->lines = LINES;
644 	view->cols = COLS;
645 	err = view_resize(view);
646 	if (err)
647 		return err;
648 
649 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
650 		return got_error_from_errno("mvwin");
651 
652 	return NULL;
653 }
654 
655 static int
656 view_is_parent_view(struct tog_view *view)
657 {
658 	return view->parent == NULL;
659 }
660 
661 static const struct got_error *
662 view_resize(struct tog_view *view)
663 {
664 	int nlines, ncols;
665 
666 	if (view->lines > LINES)
667 		nlines = view->nlines - (view->lines - LINES);
668 	else
669 		nlines = view->nlines + (LINES - view->lines);
670 
671 	if (view->cols > COLS)
672 		ncols = view->ncols - (view->cols - COLS);
673 	else
674 		ncols = view->ncols + (COLS - view->cols);
675 
676 	if (wresize(view->window, nlines, ncols) == ERR)
677 		return got_error_from_errno("wresize");
678 	if (replace_panel(view->panel, view->window) == ERR)
679 		return got_error_from_errno("replace_panel");
680 	wclear(view->window);
681 
682 	view->nlines = nlines;
683 	view->ncols = ncols;
684 	view->lines = LINES;
685 	view->cols = COLS;
686 
687 	if (view->child) {
688 		view->child->begin_x = view_split_begin_x(view->begin_x);
689 		if (view->child->begin_x == 0) {
690 			view_fullscreen(view->child);
691 			if (view->child->focussed)
692 				show_panel(view->child->panel);
693 			else
694 				show_panel(view->panel);
695 		} else {
696 			view_splitscreen(view->child);
697 			show_panel(view->child->panel);
698 		}
699 	}
700 
701 	return NULL;
702 }
703 
704 static const struct got_error *
705 view_close_child(struct tog_view *view)
706 {
707 	const struct got_error *err = NULL;
708 
709 	if (view->child == NULL)
710 		return NULL;
711 
712 	err = view_close(view->child);
713 	view->child = NULL;
714 	return err;
715 }
716 
717 static const struct got_error *
718 view_set_child(struct tog_view *view, struct tog_view *child)
719 {
720 	const struct got_error *err = NULL;
721 
722 	view->child = child;
723 	child->parent = view;
724 	return err;
725 }
726 
727 static int
728 view_is_splitscreen(struct tog_view *view)
729 {
730 	return view->begin_x > 0;
731 }
732 
733 static void
734 tog_resizeterm(void)
735 {
736 	int cols, lines;
737 	struct winsize size;
738 
739 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
740 		cols = 80;     /* Default */
741 		lines = 24;
742 	} else {
743 		cols = size.ws_col;
744 		lines = size.ws_row;
745 	}
746 	resize_term(lines, cols);
747 }
748 
749 static const struct got_error *
750 view_search_start(struct tog_view *view)
751 {
752 	const struct got_error *err = NULL;
753 	char pattern[1024];
754 	int ret;
755 
756 	if (view->nlines < 1)
757 		return NULL;
758 
759 	mvwaddstr(view->window, view->begin_y + view->nlines - 1, 0, "/");
760 	wclrtoeol(view->window);
761 
762 	nocbreak();
763 	echo();
764 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
765 	cbreak();
766 	noecho();
767 	if (ret == ERR)
768 		return NULL;
769 
770 	if (view->searching) {
771 		regfree(&view->regex);
772 		view->searching = 0;
773 	}
774 
775 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
776 		err = view->search_start(view);
777 		if (err) {
778 			regfree(&view->regex);
779 			return err;
780 		}
781 		view->searching = TOG_SEARCH_FORWARD;
782 		view->search_next_done = 0;
783 		view->search_next(view);
784 	}
785 
786 	return NULL;
787 }
788 
789 static const struct got_error *
790 view_input(struct tog_view **new, struct tog_view **dead,
791     struct tog_view **focus, int *done, struct tog_view *view,
792     struct tog_view_list_head *views)
793 {
794 	const struct got_error *err = NULL;
795 	struct tog_view *v;
796 	int ch, errcode;
797 
798 	*new = NULL;
799 	*dead = NULL;
800 	*focus = NULL;
801 
802 	/* Clear "no matches" indicator. */
803 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
804 	    view->search_next_done == TOG_SEARCH_HAVE_NONE)
805 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
806 
807 	if (view->searching && !view->search_next_done) {
808 		errcode = pthread_mutex_unlock(&tog_mutex);
809 		if (errcode)
810 			return got_error_set_errno(errcode,
811 			    "pthread_mutex_unlock");
812 		pthread_yield();
813 		errcode = pthread_mutex_lock(&tog_mutex);
814 		if (errcode)
815 			return got_error_set_errno(errcode,
816 			    "pthread_mutex_lock");
817 		view->search_next(view);
818 		return NULL;
819 	}
820 
821 	nodelay(stdscr, FALSE);
822 	/* Allow threads to make progress while we are waiting for input. */
823 	errcode = pthread_mutex_unlock(&tog_mutex);
824 	if (errcode)
825 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
826 	ch = wgetch(view->window);
827 	errcode = pthread_mutex_lock(&tog_mutex);
828 	if (errcode)
829 		return got_error_set_errno(errcode, "pthread_mutex_lock");
830 	nodelay(stdscr, TRUE);
831 
832 	if (tog_sigwinch_received || tog_sigcont_received) {
833 		tog_resizeterm();
834 		tog_sigwinch_received = 0;
835 		tog_sigcont_received = 0;
836 		TAILQ_FOREACH(v, views, entry) {
837 			err = view_resize(v);
838 			if (err)
839 				return err;
840 			err = v->input(new, dead, focus, v, KEY_RESIZE);
841 			if (err)
842 				return err;
843 		}
844 	}
845 
846 	switch (ch) {
847 	case ERR:
848 		break;
849 	case '\t':
850 		if (view->child) {
851 			*focus = view->child;
852 			view->child_focussed = 1;
853 		} else if (view->parent) {
854 			*focus = view->parent;
855 			view->parent->child_focussed = 0;
856 		}
857 		break;
858 	case 'q':
859 		err = view->input(new, dead, focus, view, ch);
860 		*dead = view;
861 		break;
862 	case 'Q':
863 		*done = 1;
864 		break;
865 	case 'f':
866 		if (view_is_parent_view(view)) {
867 			if (view->child == NULL)
868 				break;
869 			if (view_is_splitscreen(view->child)) {
870 				*focus = view->child;
871 				view->child_focussed = 1;
872 				err = view_fullscreen(view->child);
873 			} else
874 				err = view_splitscreen(view->child);
875 			if (err)
876 				break;
877 			err = view->child->input(new, dead, focus,
878 			    view->child, KEY_RESIZE);
879 		} else {
880 			if (view_is_splitscreen(view)) {
881 				*focus = view;
882 				view->parent->child_focussed = 1;
883 				err = view_fullscreen(view);
884 			} else {
885 				err = view_splitscreen(view);
886 			}
887 			if (err)
888 				break;
889 			err = view->input(new, dead, focus, view,
890 			    KEY_RESIZE);
891 		}
892 		break;
893 	case KEY_RESIZE:
894 		break;
895 	case '/':
896 		if (view->search_start)
897 			view_search_start(view);
898 		else
899 			err = view->input(new, dead, focus, view, ch);
900 		break;
901 	case 'N':
902 	case 'n':
903 		if (view->search_next) {
904 			view->searching = (ch == 'n' ?
905 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
906 			view->search_next_done = 0;
907 			view->search_next(view);
908 		} else
909 			err = view->input(new, dead, focus, view, ch);
910 		break;
911 	default:
912 		err = view->input(new, dead, focus, view, ch);
913 		break;
914 	}
915 
916 	return err;
917 }
918 
919 void
920 view_vborder(struct tog_view *view)
921 {
922 	PANEL *panel;
923 	struct tog_view *view_above;
924 
925 	if (view->parent)
926 		return view_vborder(view->parent);
927 
928 	panel = panel_above(view->panel);
929 	if (panel == NULL)
930 		return;
931 
932 	view_above = panel_userptr(panel);
933 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
934 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
935 }
936 
937 int
938 view_needs_focus_indication(struct tog_view *view)
939 {
940 	if (view_is_parent_view(view)) {
941 		if (view->child == NULL || view->child_focussed)
942 			return 0;
943 		if (!view_is_splitscreen(view->child))
944 			return 0;
945 	} else if (!view_is_splitscreen(view))
946 		return 0;
947 
948 	return view->focussed;
949 }
950 
951 static const struct got_error *
952 view_loop(struct tog_view *view)
953 {
954 	const struct got_error *err = NULL;
955 	struct tog_view_list_head views;
956 	struct tog_view *new_view, *dead_view, *focus_view, *main_view;
957 	int fast_refresh = 10;
958 	int done = 0, errcode;
959 
960 	errcode = pthread_mutex_lock(&tog_mutex);
961 	if (errcode)
962 		return got_error_set_errno(errcode, "pthread_mutex_lock");
963 
964 	TAILQ_INIT(&views);
965 	TAILQ_INSERT_HEAD(&views, view, entry);
966 
967 	main_view = view;
968 	view->focussed = 1;
969 	err = view->show(view);
970 	if (err)
971 		return err;
972 	update_panels();
973 	doupdate();
974 	while (!TAILQ_EMPTY(&views) && !done && !tog_sigpipe_received) {
975 		/* Refresh fast during initialization, then become slower. */
976 		if (fast_refresh && fast_refresh-- == 0)
977 			halfdelay(10); /* switch to once per second */
978 
979 		err = view_input(&new_view, &dead_view, &focus_view, &done,
980 		    view, &views);
981 		if (err)
982 			break;
983 		if (dead_view) {
984 			struct tog_view *prev = NULL;
985 
986 			if (view_is_parent_view(dead_view))
987 				prev = TAILQ_PREV(dead_view,
988 				    tog_view_list_head, entry);
989 			else if (view->parent != dead_view)
990 				prev = view->parent;
991 
992 			if (dead_view->parent)
993 				dead_view->parent->child = NULL;
994 			else
995 				TAILQ_REMOVE(&views, dead_view, entry);
996 
997 			err = view_close(dead_view);
998 			if (err || (dead_view == main_view && new_view == NULL))
999 				goto done;
1000 
1001 			if (view == dead_view) {
1002 				if (focus_view)
1003 					view = focus_view;
1004 				else if (prev)
1005 					view = prev;
1006 				else if (!TAILQ_EMPTY(&views))
1007 					view = TAILQ_LAST(&views,
1008 					    tog_view_list_head);
1009 				else
1010 					view = NULL;
1011 				if (view) {
1012 					if (view->child && view->child_focussed)
1013 						focus_view = view->child;
1014 					else
1015 						focus_view = view;
1016 				}
1017 			}
1018 		}
1019 		if (new_view) {
1020 			struct tog_view *v, *t;
1021 			/* Only allow one parent view per type. */
1022 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1023 				if (v->type != new_view->type)
1024 					continue;
1025 				TAILQ_REMOVE(&views, v, entry);
1026 				err = view_close(v);
1027 				if (err)
1028 					goto done;
1029 				break;
1030 			}
1031 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1032 			view = new_view;
1033 			if (focus_view == NULL)
1034 				focus_view = new_view;
1035 		}
1036 		if (focus_view) {
1037 			show_panel(focus_view->panel);
1038 			if (view)
1039 				view->focussed = 0;
1040 			focus_view->focussed = 1;
1041 			view = focus_view;
1042 			if (new_view)
1043 				show_panel(new_view->panel);
1044 			if (view->child && view_is_splitscreen(view->child))
1045 				show_panel(view->child->panel);
1046 		}
1047 		if (view) {
1048 			if (focus_view == NULL) {
1049 				view->focussed = 1;
1050 				show_panel(view->panel);
1051 				if (view->child && view_is_splitscreen(view->child))
1052 					show_panel(view->child->panel);
1053 				focus_view = view;
1054 			}
1055 			if (view->parent) {
1056 				err = view->parent->show(view->parent);
1057 				if (err)
1058 					goto done;
1059 			}
1060 			err = view->show(view);
1061 			if (err)
1062 				goto done;
1063 			if (view->child) {
1064 				err = view->child->show(view->child);
1065 				if (err)
1066 					goto done;
1067 			}
1068 			update_panels();
1069 			doupdate();
1070 		}
1071 	}
1072 done:
1073 	while (!TAILQ_EMPTY(&views)) {
1074 		view = TAILQ_FIRST(&views);
1075 		TAILQ_REMOVE(&views, view, entry);
1076 		view_close(view);
1077 	}
1078 
1079 	errcode = pthread_mutex_unlock(&tog_mutex);
1080 	if (errcode && err == NULL)
1081 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1082 
1083 	return err;
1084 }
1085 
1086 __dead static void
1087 usage_log(void)
1088 {
1089 	endwin();
1090 	fprintf(stderr,
1091 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1092 	    getprogname());
1093 	exit(1);
1094 }
1095 
1096 /* Create newly allocated wide-character string equivalent to a byte string. */
1097 static const struct got_error *
1098 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1099 {
1100 	char *vis = NULL;
1101 	const struct got_error *err = NULL;
1102 
1103 	*ws = NULL;
1104 	*wlen = mbstowcs(NULL, s, 0);
1105 	if (*wlen == (size_t)-1) {
1106 		int vislen;
1107 		if (errno != EILSEQ)
1108 			return got_error_from_errno("mbstowcs");
1109 
1110 		/* byte string invalid in current encoding; try to "fix" it */
1111 		err = got_mbsavis(&vis, &vislen, s);
1112 		if (err)
1113 			return err;
1114 		*wlen = mbstowcs(NULL, vis, 0);
1115 		if (*wlen == (size_t)-1) {
1116 			err = got_error_from_errno("mbstowcs"); /* give up */
1117 			goto done;
1118 		}
1119 	}
1120 
1121 	*ws = calloc(*wlen + 1, sizeof(**ws));
1122 	if (*ws == NULL) {
1123 		err = got_error_from_errno("calloc");
1124 		goto done;
1125 	}
1126 
1127 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1128 		err = got_error_from_errno("mbstowcs");
1129 done:
1130 	free(vis);
1131 	if (err) {
1132 		free(*ws);
1133 		*ws = NULL;
1134 		*wlen = 0;
1135 	}
1136 	return err;
1137 }
1138 
1139 /* Format a line for display, ensuring that it won't overflow a width limit. */
1140 static const struct got_error *
1141 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit,
1142     int col_tab_align)
1143 {
1144 	const struct got_error *err = NULL;
1145 	int cols = 0;
1146 	wchar_t *wline = NULL;
1147 	size_t wlen;
1148 	int i;
1149 
1150 	*wlinep = NULL;
1151 	*widthp = 0;
1152 
1153 	err = mbs2ws(&wline, &wlen, line);
1154 	if (err)
1155 		return err;
1156 
1157 	i = 0;
1158 	while (i < wlen) {
1159 		int width = wcwidth(wline[i]);
1160 
1161 		if (width == 0) {
1162 			i++;
1163 			continue;
1164 		}
1165 
1166 		if (width == 1 || width == 2) {
1167 			if (cols + width > wlimit)
1168 				break;
1169 			cols += width;
1170 			i++;
1171 		} else if (width == -1) {
1172 			if (wline[i] == L'\t') {
1173 				width = TABSIZE -
1174 				    ((cols + col_tab_align) % TABSIZE);
1175 				if (cols + width > wlimit)
1176 					break;
1177 				cols += width;
1178 			}
1179 			i++;
1180 		} else {
1181 			err = got_error_from_errno("wcwidth");
1182 			goto done;
1183 		}
1184 	}
1185 	wline[i] = L'\0';
1186 	if (widthp)
1187 		*widthp = cols;
1188 done:
1189 	if (err)
1190 		free(wline);
1191 	else
1192 		*wlinep = wline;
1193 	return err;
1194 }
1195 
1196 static const struct got_error*
1197 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1198     struct got_object_id *id, struct got_repository *repo)
1199 {
1200 	static const struct got_error *err = NULL;
1201 	struct got_reflist_entry *re;
1202 	char *s;
1203 	const char *name;
1204 
1205 	*refs_str = NULL;
1206 
1207 	SIMPLEQ_FOREACH(re, refs, entry) {
1208 		struct got_tag_object *tag = NULL;
1209 		struct got_object_id *ref_id;
1210 		int cmp;
1211 
1212 		name = got_ref_get_name(re->ref);
1213 		if (strcmp(name, GOT_REF_HEAD) == 0)
1214 			continue;
1215 		if (strncmp(name, "refs/", 5) == 0)
1216 			name += 5;
1217 		if (strncmp(name, "got/", 4) == 0)
1218 			continue;
1219 		if (strncmp(name, "heads/", 6) == 0)
1220 			name += 6;
1221 		if (strncmp(name, "remotes/", 8) == 0) {
1222 			name += 8;
1223 			s = strstr(name, "/" GOT_REF_HEAD);
1224 			if (s != NULL && s[strlen(s)] == '\0')
1225 				continue;
1226 		}
1227 		err = got_ref_resolve(&ref_id, repo, re->ref);
1228 		if (err)
1229 			break;
1230 		if (strncmp(name, "tags/", 5) == 0) {
1231 			err = got_object_open_as_tag(&tag, repo, ref_id);
1232 			if (err) {
1233 				if (err->code != GOT_ERR_OBJ_TYPE) {
1234 					free(ref_id);
1235 					break;
1236 				}
1237 				/* Ref points at something other than a tag. */
1238 				err = NULL;
1239 				tag = NULL;
1240 			}
1241 		}
1242 		cmp = got_object_id_cmp(tag ?
1243 		    got_object_tag_get_object_id(tag) : ref_id, id);
1244 		free(ref_id);
1245 		if (tag)
1246 			got_object_tag_close(tag);
1247 		if (cmp != 0)
1248 			continue;
1249 		s = *refs_str;
1250 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1251 		    s ? ", " : "", name) == -1) {
1252 			err = got_error_from_errno("asprintf");
1253 			free(s);
1254 			*refs_str = NULL;
1255 			break;
1256 		}
1257 		free(s);
1258 	}
1259 
1260 	return err;
1261 }
1262 
1263 static const struct got_error *
1264 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1265     int col_tab_align)
1266 {
1267 	char *smallerthan, *at;
1268 
1269 	smallerthan = strchr(author, '<');
1270 	if (smallerthan && smallerthan[1] != '\0')
1271 		author = smallerthan + 1;
1272 	at = strchr(author, '@');
1273 	if (at)
1274 		*at = '\0';
1275 	return format_line(wauthor, author_width, author, limit, col_tab_align);
1276 }
1277 
1278 static const struct got_error *
1279 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1280     struct got_object_id *id, const size_t date_display_cols,
1281     int author_display_cols)
1282 {
1283 	struct tog_log_view_state *s = &view->state.log;
1284 	const struct got_error *err = NULL;
1285 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1286 	char *logmsg0 = NULL, *logmsg = NULL;
1287 	char *author = NULL;
1288 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1289 	int author_width, logmsg_width;
1290 	char *newline, *line = NULL;
1291 	int col, limit;
1292 	const int avail = view->ncols;
1293 	struct tm tm;
1294 	time_t committer_time;
1295 	struct tog_color *tc;
1296 
1297 	committer_time = got_object_commit_get_committer_time(commit);
1298 	if (localtime_r(&committer_time, &tm) == NULL)
1299 		return got_error_from_errno("localtime_r");
1300 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm)
1301 	    >= sizeof(datebuf))
1302 		return got_error(GOT_ERR_NO_SPACE);
1303 
1304 	if (avail <= date_display_cols)
1305 		limit = MIN(sizeof(datebuf) - 1, avail);
1306 	else
1307 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1308 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1309 	if (tc)
1310 		wattr_on(view->window,
1311 		    COLOR_PAIR(tc->colorpair), NULL);
1312 	waddnstr(view->window, datebuf, limit);
1313 	if (tc)
1314 		wattr_off(view->window,
1315 		    COLOR_PAIR(tc->colorpair), NULL);
1316 	col = limit;
1317 	if (col > avail)
1318 		goto done;
1319 
1320 	if (avail >= 120) {
1321 		char *id_str;
1322 		err = got_object_id_str(&id_str, id);
1323 		if (err)
1324 			goto done;
1325 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1326 		if (tc)
1327 			wattr_on(view->window,
1328 			    COLOR_PAIR(tc->colorpair), NULL);
1329 		wprintw(view->window, "%.8s ", id_str);
1330 		if (tc)
1331 			wattr_off(view->window,
1332 			    COLOR_PAIR(tc->colorpair), NULL);
1333 		free(id_str);
1334 		col += 9;
1335 		if (col > avail)
1336 			goto done;
1337 	}
1338 
1339 	author = strdup(got_object_commit_get_author(commit));
1340 	if (author == NULL) {
1341 		err = got_error_from_errno("strdup");
1342 		goto done;
1343 	}
1344 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1345 	if (err)
1346 		goto done;
1347 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1348 	if (tc)
1349 		wattr_on(view->window,
1350 		    COLOR_PAIR(tc->colorpair), NULL);
1351 	waddwstr(view->window, wauthor);
1352 	if (tc)
1353 		wattr_off(view->window,
1354 		    COLOR_PAIR(tc->colorpair), NULL);
1355 	col += author_width;
1356 	while (col < avail && author_width < author_display_cols + 2) {
1357 		waddch(view->window, ' ');
1358 		col++;
1359 		author_width++;
1360 	}
1361 	if (col > avail)
1362 		goto done;
1363 
1364 	err = got_object_commit_get_logmsg(&logmsg0, commit);
1365 	if (err)
1366 		goto done;
1367 	logmsg = logmsg0;
1368 	while (*logmsg == '\n')
1369 		logmsg++;
1370 	newline = strchr(logmsg, '\n');
1371 	if (newline)
1372 		*newline = '\0';
1373 	limit = avail - col;
1374 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit, col);
1375 	if (err)
1376 		goto done;
1377 	waddwstr(view->window, wlogmsg);
1378 	col += logmsg_width;
1379 	while (col < avail) {
1380 		waddch(view->window, ' ');
1381 		col++;
1382 	}
1383 done:
1384 	free(logmsg0);
1385 	free(wlogmsg);
1386 	free(author);
1387 	free(wauthor);
1388 	free(line);
1389 	return err;
1390 }
1391 
1392 static struct commit_queue_entry *
1393 alloc_commit_queue_entry(struct got_commit_object *commit,
1394     struct got_object_id *id)
1395 {
1396 	struct commit_queue_entry *entry;
1397 
1398 	entry = calloc(1, sizeof(*entry));
1399 	if (entry == NULL)
1400 		return NULL;
1401 
1402 	entry->id = id;
1403 	entry->commit = commit;
1404 	return entry;
1405 }
1406 
1407 static void
1408 pop_commit(struct commit_queue *commits)
1409 {
1410 	struct commit_queue_entry *entry;
1411 
1412 	entry = TAILQ_FIRST(&commits->head);
1413 	TAILQ_REMOVE(&commits->head, entry, entry);
1414 	got_object_commit_close(entry->commit);
1415 	commits->ncommits--;
1416 	/* Don't free entry->id! It is owned by the commit graph. */
1417 	free(entry);
1418 }
1419 
1420 static void
1421 free_commits(struct commit_queue *commits)
1422 {
1423 	while (!TAILQ_EMPTY(&commits->head))
1424 		pop_commit(commits);
1425 }
1426 
1427 static const struct got_error *
1428 match_commit(int *have_match, struct got_object_id *id,
1429     struct got_commit_object *commit, regex_t *regex)
1430 {
1431 	const struct got_error *err = NULL;
1432 	regmatch_t regmatch;
1433 	char *id_str = NULL, *logmsg = NULL;
1434 
1435 	*have_match = 0;
1436 
1437 	err = got_object_id_str(&id_str, id);
1438 	if (err)
1439 		return err;
1440 
1441 	err = got_object_commit_get_logmsg(&logmsg, commit);
1442 	if (err)
1443 		goto done;
1444 
1445 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1446 	    &regmatch, 0) == 0 ||
1447 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1448 	    &regmatch, 0) == 0 ||
1449 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
1450 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
1451 		*have_match = 1;
1452 done:
1453 	free(id_str);
1454 	free(logmsg);
1455 	return err;
1456 }
1457 
1458 static const struct got_error *
1459 queue_commits(struct got_commit_graph *graph, struct commit_queue *commits,
1460     int minqueue, struct got_repository *repo, const char *path,
1461     int *searching, int *search_next_done, regex_t *regex)
1462 {
1463 	const struct got_error *err = NULL;
1464 	int nqueued = 0;
1465 
1466 	/*
1467 	 * We keep all commits open throughout the lifetime of the log
1468 	 * view in order to avoid having to re-fetch commits from disk
1469 	 * while updating the display.
1470 	 */
1471 	while (nqueued < minqueue ||
1472 	    (*searching == TOG_SEARCH_FORWARD && !*search_next_done)) {
1473 		struct got_object_id *id;
1474 		struct got_commit_object *commit;
1475 		struct commit_queue_entry *entry;
1476 		int errcode;
1477 
1478 		err = got_commit_graph_iter_next(&id, graph, repo, NULL, NULL);
1479 		if (err || id == NULL)
1480 			break;
1481 
1482 		err = got_object_open_as_commit(&commit, repo, id);
1483 		if (err)
1484 			break;
1485 		entry = alloc_commit_queue_entry(commit, id);
1486 		if (entry == NULL) {
1487 			err = got_error_from_errno("alloc_commit_queue_entry");
1488 			break;
1489 		}
1490 
1491 		errcode = pthread_mutex_lock(&tog_mutex);
1492 		if (errcode) {
1493 			err = got_error_set_errno(errcode,
1494 			    "pthread_mutex_lock");
1495 			break;
1496 		}
1497 
1498 		entry->idx = commits->ncommits;
1499 		TAILQ_INSERT_TAIL(&commits->head, entry, entry);
1500 		nqueued++;
1501 		commits->ncommits++;
1502 
1503 		if (*searching == TOG_SEARCH_FORWARD && !*search_next_done) {
1504 			int have_match;
1505 			err = match_commit(&have_match, id, commit, regex);
1506 			if (err)
1507 				break;
1508 			if (have_match)
1509 				*search_next_done = TOG_SEARCH_HAVE_MORE;
1510 		}
1511 
1512 		errcode = pthread_mutex_unlock(&tog_mutex);
1513 		if (errcode && err == NULL)
1514 			err = got_error_set_errno(errcode,
1515 			    "pthread_mutex_unlock");
1516 		if (err)
1517 			break;
1518 	}
1519 
1520 	return err;
1521 }
1522 
1523 static const struct got_error *
1524 draw_commits(struct tog_view *view)
1525 {
1526 	const struct got_error *err = NULL;
1527 	struct tog_log_view_state *s = &view->state.log;
1528 	struct commit_queue_entry *entry;
1529 	const int limit = view->nlines;
1530 	int width;
1531 	int ncommits, author_cols = 4;
1532 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1533 	char *refs_str = NULL;
1534 	wchar_t *wline;
1535 	struct tog_color *tc;
1536 	static const size_t date_display_cols = 12;
1537 
1538 	entry = s->first_displayed_entry;
1539 	ncommits = 0;
1540 	while (entry) {
1541 		if (ncommits == s->selected) {
1542 			s->selected_entry = entry;
1543 			break;
1544 		}
1545 		entry = TAILQ_NEXT(entry, entry);
1546 		ncommits++;
1547 	}
1548 
1549 	if (s->selected_entry &&
1550 	    !(view->searching && view->search_next_done == 0)) {
1551 		err = got_object_id_str(&id_str, s->selected_entry->id);
1552 		if (err)
1553 			return err;
1554 		err = build_refs_str(&refs_str, &s->refs,
1555 		    s->selected_entry->id, s->repo);
1556 		if (err)
1557 			goto done;
1558 	}
1559 
1560 	if (s->thread_args.commits_needed == 0)
1561 		halfdelay(10); /* disable fast refresh */
1562 
1563 	if (s->thread_args.commits_needed > 0) {
1564 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1565 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1566 		    (view->searching && !view->search_next_done) ?
1567 		    "searching..." : "loading...") == -1) {
1568 			err = got_error_from_errno("asprintf");
1569 			goto done;
1570 		}
1571 	} else {
1572 		const char *search_str = NULL;
1573 
1574 		if (view->searching) {
1575 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1576 				search_str = "no more matches";
1577 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1578 				search_str = "no matches found";
1579 			else if (!view->search_next_done)
1580 				search_str = "searching...";
1581 		}
1582 
1583 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1584 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
1585 		    search_str ? search_str :
1586 		    (refs_str ? refs_str : "")) == -1) {
1587 			err = got_error_from_errno("asprintf");
1588 			goto done;
1589 		}
1590 	}
1591 
1592 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
1593 		if (asprintf(&header, "commit %s %s%s",
1594 		    id_str ? id_str : "........................................",
1595 		    s->in_repo_path, ncommits_str) == -1) {
1596 			err = got_error_from_errno("asprintf");
1597 			header = NULL;
1598 			goto done;
1599 		}
1600 	} else if (asprintf(&header, "commit %s%s",
1601 	    id_str ? id_str : "........................................",
1602 	    ncommits_str) == -1) {
1603 		err = got_error_from_errno("asprintf");
1604 		header = NULL;
1605 		goto done;
1606 	}
1607 	err = format_line(&wline, &width, header, view->ncols, 0);
1608 	if (err)
1609 		goto done;
1610 
1611 	werase(view->window);
1612 
1613 	if (view_needs_focus_indication(view))
1614 		wstandout(view->window);
1615 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1616 	if (tc)
1617 		wattr_on(view->window,
1618 		    COLOR_PAIR(tc->colorpair), NULL);
1619 	waddwstr(view->window, wline);
1620 	if (tc)
1621 		wattr_off(view->window,
1622 		    COLOR_PAIR(tc->colorpair), NULL);
1623 	while (width < view->ncols) {
1624 		waddch(view->window, ' ');
1625 		width++;
1626 	}
1627 	if (view_needs_focus_indication(view))
1628 		wstandend(view->window);
1629 	free(wline);
1630 	if (limit <= 1)
1631 		goto done;
1632 
1633 	/* Grow author column size if necessary. */
1634 	entry = s->first_displayed_entry;
1635 	ncommits = 0;
1636 	while (entry) {
1637 		char *author;
1638 		wchar_t *wauthor;
1639 		int width;
1640 		if (ncommits >= limit - 1)
1641 			break;
1642 		author = strdup(got_object_commit_get_author(entry->commit));
1643 		if (author == NULL) {
1644 			err = got_error_from_errno("strdup");
1645 			goto done;
1646 		}
1647 		err = format_author(&wauthor, &width, author, COLS,
1648 		    date_display_cols);
1649 		if (author_cols < width)
1650 			author_cols = width;
1651 		free(wauthor);
1652 		free(author);
1653 		ncommits++;
1654 		entry = TAILQ_NEXT(entry, entry);
1655 	}
1656 
1657 	entry = s->first_displayed_entry;
1658 	s->last_displayed_entry = s->first_displayed_entry;
1659 	ncommits = 0;
1660 	while (entry) {
1661 		if (ncommits >= limit - 1)
1662 			break;
1663 		if (ncommits == s->selected)
1664 			wstandout(view->window);
1665 		err = draw_commit(view, entry->commit, entry->id,
1666 		    date_display_cols, author_cols);
1667 		if (ncommits == s->selected)
1668 			wstandend(view->window);
1669 		if (err)
1670 			goto done;
1671 		ncommits++;
1672 		s->last_displayed_entry = entry;
1673 		entry = TAILQ_NEXT(entry, entry);
1674 	}
1675 
1676 	view_vborder(view);
1677 done:
1678 	free(id_str);
1679 	free(refs_str);
1680 	free(ncommits_str);
1681 	free(header);
1682 	return err;
1683 }
1684 
1685 static void
1686 log_scroll_up(struct tog_view *view, int maxscroll)
1687 {
1688 	struct tog_log_view_state *s = &view->state.log;
1689 	struct commit_queue_entry *entry;
1690 	int nscrolled = 0;
1691 
1692 	entry = TAILQ_FIRST(&s->commits.head);
1693 	if (s->first_displayed_entry == entry)
1694 		return;
1695 
1696 	entry = s->first_displayed_entry;
1697 	while (entry && nscrolled < maxscroll) {
1698 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1699 		if (entry) {
1700 			s->first_displayed_entry = entry;
1701 			nscrolled++;
1702 		}
1703 	}
1704 }
1705 
1706 static const struct got_error *
1707 trigger_log_thread(struct tog_view *view, int wait)
1708 {
1709 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1710 	int errcode;
1711 
1712 	halfdelay(1); /* fast refresh while loading commits */
1713 
1714 	while (ta->commits_needed > 0) {
1715 		if (ta->log_complete)
1716 			break;
1717 
1718 		/* Wake the log thread. */
1719 		errcode = pthread_cond_signal(&ta->need_commits);
1720 		if (errcode)
1721 			return got_error_set_errno(errcode,
1722 			    "pthread_cond_signal");
1723 
1724 		/*
1725 		 * The mutex will be released while the view loop waits
1726 		 * in wgetch(), at which time the log thread will run.
1727 		 */
1728 		if (!wait)
1729 			break;
1730 
1731 		/* Display progress update in log view. */
1732 		show_log_view(view);
1733 		update_panels();
1734 		doupdate();
1735 
1736 		/* Wait right here while next commit is being loaded. */
1737 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1738 		if (errcode)
1739 			return got_error_set_errno(errcode,
1740 			    "pthread_cond_wait");
1741 
1742 		/* Display progress update in log view. */
1743 		show_log_view(view);
1744 		update_panels();
1745 		doupdate();
1746 	}
1747 
1748 	return NULL;
1749 }
1750 
1751 static const struct got_error *
1752 log_scroll_down(struct tog_view *view, int maxscroll)
1753 {
1754 	struct tog_log_view_state *s = &view->state.log;
1755 	const struct got_error *err = NULL;
1756 	struct commit_queue_entry *pentry;
1757 	int nscrolled = 0, ncommits_needed;
1758 
1759 	if (s->last_displayed_entry == NULL)
1760 		return NULL;
1761 
1762 	ncommits_needed = (s->last_displayed_entry)->idx + 1 + maxscroll;
1763 	if (s->commits.ncommits < ncommits_needed &&
1764 	    !s->thread_args.log_complete) {
1765 		/*
1766 		 * Ask the log thread for required amount of commits.
1767 		 */
1768 		s->thread_args.commits_needed += maxscroll;
1769 		err = trigger_log_thread(view, 1);
1770 		if (err)
1771 			return err;
1772 	}
1773 
1774 	do {
1775 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1776 		if (pentry == NULL)
1777 			break;
1778 
1779 		s->last_displayed_entry = pentry;
1780 
1781 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1782 		if (pentry == NULL)
1783 			break;
1784 		s->first_displayed_entry = pentry;
1785 	} while (++nscrolled < maxscroll);
1786 
1787 	return err;
1788 }
1789 
1790 static const struct got_error *
1791 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1792     struct got_commit_object *commit, struct got_object_id *commit_id,
1793     struct tog_view *log_view, struct got_repository *repo)
1794 {
1795 	const struct got_error *err;
1796 	struct got_object_qid *parent_id;
1797 	struct tog_view *diff_view;
1798 
1799 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1800 	if (diff_view == NULL)
1801 		return got_error_from_errno("view_open");
1802 
1803 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1804 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1805 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
1806 	if (err == NULL)
1807 		*new_view = diff_view;
1808 	return err;
1809 }
1810 
1811 static const struct got_error *
1812 tree_view_visit_subtree(struct got_tree_object *subtree,
1813     struct tog_tree_view_state *s)
1814 {
1815 	struct tog_parent_tree *parent;
1816 
1817 	parent = calloc(1, sizeof(*parent));
1818 	if (parent == NULL)
1819 		return got_error_from_errno("calloc");
1820 
1821 	parent->tree = s->tree;
1822 	parent->first_displayed_entry = s->first_displayed_entry;
1823 	parent->selected_entry = s->selected_entry;
1824 	parent->selected = s->selected;
1825 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1826 	s->tree = subtree;
1827 	s->selected = 0;
1828 	s->first_displayed_entry = NULL;
1829 	return NULL;
1830 }
1831 
1832 static const struct got_error *
1833 tree_view_walk_path(struct tog_tree_view_state *s,
1834     struct got_object_id *commit_id,
1835     const char *path, struct got_repository *repo)
1836 {
1837 	const struct got_error *err = NULL;
1838 	struct got_tree_object *tree = NULL;
1839 	const char *p;
1840 	char *slash, *subpath = NULL;
1841 
1842 	/* Walk the path and open corresponding tree objects. */
1843 	p = path;
1844 	while (*p) {
1845 		struct got_tree_entry *te;
1846 		struct got_object_id *tree_id;
1847 		char *te_name;
1848 
1849 		while (p[0] == '/')
1850 			p++;
1851 
1852 		/* Ensure the correct subtree entry is selected. */
1853 		slash = strchr(p, '/');
1854 		if (slash == NULL)
1855 			te_name = strdup(p);
1856 		else
1857 			te_name = strndup(p, slash - p);
1858 		if (te_name == NULL) {
1859 			err = got_error_from_errno("strndup");
1860 			break;
1861 		}
1862 		te = got_object_tree_find_entry(s->tree, te_name);
1863 		if (te == NULL) {
1864 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
1865 			free(te_name);
1866 			break;
1867 		}
1868 		free(te_name);
1869 		s->first_displayed_entry = s->selected_entry = te;
1870 
1871 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
1872 			break; /* jump to this file's entry */
1873 
1874 		slash = strchr(p, '/');
1875 		if (slash)
1876 			subpath = strndup(path, slash - path);
1877 		else
1878 			subpath = strdup(path);
1879 		if (subpath == NULL) {
1880 			err = got_error_from_errno("strdup");
1881 			break;
1882 		}
1883 
1884 		err = got_object_id_by_path(&tree_id, repo, commit_id,
1885 		    subpath);
1886 		if (err)
1887 			break;
1888 
1889 		err = got_object_open_as_tree(&tree, repo, tree_id);
1890 		free(tree_id);
1891 		if (err)
1892 			break;
1893 
1894 		err = tree_view_visit_subtree(tree, s);
1895 		if (err) {
1896 			got_object_tree_close(tree);
1897 			break;
1898 		}
1899 		if (slash == NULL)
1900 			break;
1901 		free(subpath);
1902 		subpath = NULL;
1903 		p = slash;
1904 	}
1905 
1906 	free(subpath);
1907 	return err;
1908 }
1909 
1910 static const struct got_error *
1911 browse_commit_tree(struct tog_view **new_view, int begin_x,
1912     struct commit_queue_entry *entry, const char *path,
1913     struct got_repository *repo)
1914 {
1915 	const struct got_error *err = NULL;
1916 	struct got_tree_object *tree;
1917 	struct tog_tree_view_state *s;
1918 	struct tog_view *tree_view;
1919 
1920 	err = got_object_open_as_tree(&tree, repo,
1921 	    got_object_commit_get_tree_id(entry->commit));
1922 	if (err)
1923 		return err;
1924 
1925 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1926 	if (tree_view == NULL)
1927 		return got_error_from_errno("view_open");
1928 
1929 	err = open_tree_view(tree_view, tree, entry->id, repo);
1930 	if (err) {
1931 		got_object_tree_close(tree);
1932 		return err;
1933 	}
1934 	s = &tree_view->state.tree;
1935 
1936 	*new_view = tree_view;
1937 
1938 	if (got_path_is_root_dir(path))
1939 		return NULL;
1940 
1941 	return tree_view_walk_path(s, entry->id, path, repo);
1942 }
1943 
1944 static const struct got_error *
1945 block_signals_used_by_main_thread(void)
1946 {
1947 	sigset_t sigset;
1948 	int errcode;
1949 
1950 	if (sigemptyset(&sigset) == -1)
1951 		return got_error_from_errno("sigemptyset");
1952 
1953 	/* tog handles SIGWINCH and SIGCONT */
1954 	if (sigaddset(&sigset, SIGWINCH) == -1)
1955 		return got_error_from_errno("sigaddset");
1956 	if (sigaddset(&sigset, SIGCONT) == -1)
1957 		return got_error_from_errno("sigaddset");
1958 
1959 	/* ncurses handles SIGTSTP */
1960 	if (sigaddset(&sigset, SIGTSTP) == -1)
1961 		return got_error_from_errno("sigaddset");
1962 
1963 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
1964 	if (errcode)
1965 		return got_error_set_errno(errcode, "pthread_sigmask");
1966 
1967 	return NULL;
1968 }
1969 
1970 static void *
1971 log_thread(void *arg)
1972 {
1973 	const struct got_error *err = NULL;
1974 	int errcode = 0;
1975 	struct tog_log_thread_args *a = arg;
1976 	int done = 0;
1977 
1978 	err = block_signals_used_by_main_thread();
1979 	if (err)
1980 		return (void *)err;
1981 
1982 	while (!done && !err && !tog_sigpipe_received) {
1983 		err = queue_commits(a->graph, a->commits, 1, a->repo,
1984 		    a->in_repo_path, a->searching, a->search_next_done,
1985 		    a->regex);
1986 		if (err) {
1987 			if (err->code != GOT_ERR_ITER_COMPLETED)
1988 				return (void *)err;
1989 			err = NULL;
1990 			done = 1;
1991 		} else if (a->commits_needed > 0)
1992 			a->commits_needed--;
1993 
1994 		errcode = pthread_mutex_lock(&tog_mutex);
1995 		if (errcode) {
1996 			err = got_error_set_errno(errcode,
1997 			    "pthread_mutex_lock");
1998 			break;
1999 		} else if (*a->quit)
2000 			done = 1;
2001 		else if (*a->first_displayed_entry == NULL) {
2002 			*a->first_displayed_entry =
2003 			    TAILQ_FIRST(&a->commits->head);
2004 			*a->selected_entry = *a->first_displayed_entry;
2005 		}
2006 
2007 		errcode = pthread_cond_signal(&a->commit_loaded);
2008 		if (errcode) {
2009 			err = got_error_set_errno(errcode,
2010 			    "pthread_cond_signal");
2011 			pthread_mutex_unlock(&tog_mutex);
2012 			break;
2013 		}
2014 
2015 		if (done)
2016 			a->commits_needed = 0;
2017 		else {
2018 			if (a->commits_needed == 0) {
2019 				errcode = pthread_cond_wait(&a->need_commits,
2020 				    &tog_mutex);
2021 				if (errcode)
2022 					err = got_error_set_errno(errcode,
2023 					    "pthread_cond_wait");
2024 			}
2025 		}
2026 
2027 		errcode = pthread_mutex_unlock(&tog_mutex);
2028 		if (errcode && err == NULL)
2029 			err = got_error_set_errno(errcode,
2030 			    "pthread_mutex_unlock");
2031 	}
2032 	a->log_complete = 1;
2033 	return (void *)err;
2034 }
2035 
2036 static const struct got_error *
2037 stop_log_thread(struct tog_log_view_state *s)
2038 {
2039 	const struct got_error *err = NULL;
2040 	int errcode;
2041 
2042 	if (s->thread) {
2043 		s->quit = 1;
2044 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2045 		if (errcode)
2046 			return got_error_set_errno(errcode,
2047 			    "pthread_cond_signal");
2048 		errcode = pthread_mutex_unlock(&tog_mutex);
2049 		if (errcode)
2050 			return got_error_set_errno(errcode,
2051 			    "pthread_mutex_unlock");
2052 		errcode = pthread_join(s->thread, (void **)&err);
2053 		if (errcode)
2054 			return got_error_set_errno(errcode, "pthread_join");
2055 		errcode = pthread_mutex_lock(&tog_mutex);
2056 		if (errcode)
2057 			return got_error_set_errno(errcode,
2058 			    "pthread_mutex_lock");
2059 		s->thread = NULL;
2060 	}
2061 
2062 	if (s->thread_args.repo) {
2063 		got_repo_close(s->thread_args.repo);
2064 		s->thread_args.repo = NULL;
2065 	}
2066 
2067 	if (s->thread_args.graph) {
2068 		got_commit_graph_close(s->thread_args.graph);
2069 		s->thread_args.graph = NULL;
2070 	}
2071 
2072 	return err;
2073 }
2074 
2075 static const struct got_error *
2076 close_log_view(struct tog_view *view)
2077 {
2078 	const struct got_error *err = NULL;
2079 	struct tog_log_view_state *s = &view->state.log;
2080 	int errcode;
2081 
2082 	err = stop_log_thread(s);
2083 
2084 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2085 	if (errcode && err == NULL)
2086 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2087 
2088 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2089 	if (errcode && err == NULL)
2090 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2091 
2092 	free_commits(&s->commits);
2093 	free(s->in_repo_path);
2094 	s->in_repo_path = NULL;
2095 	free(s->start_id);
2096 	s->start_id = NULL;
2097 	got_ref_list_free(&s->refs);
2098 	return err;
2099 }
2100 
2101 static const struct got_error *
2102 search_start_log_view(struct tog_view *view)
2103 {
2104 	struct tog_log_view_state *s = &view->state.log;
2105 
2106 	s->matched_entry = NULL;
2107 	s->search_entry = NULL;
2108 	return NULL;
2109 }
2110 
2111 static const struct got_error *
2112 search_next_log_view(struct tog_view *view)
2113 {
2114 	const struct got_error *err = NULL;
2115 	struct tog_log_view_state *s = &view->state.log;
2116 	struct commit_queue_entry *entry;
2117 
2118 	/* Display progress update in log view. */
2119 	show_log_view(view);
2120 	update_panels();
2121 	doupdate();
2122 
2123 	if (s->search_entry) {
2124 		int errcode, ch;
2125 		errcode = pthread_mutex_unlock(&tog_mutex);
2126 		if (errcode)
2127 			return got_error_set_errno(errcode,
2128 			    "pthread_mutex_unlock");
2129 		ch = wgetch(view->window);
2130 		errcode = pthread_mutex_lock(&tog_mutex);
2131 		if (errcode)
2132 			return got_error_set_errno(errcode,
2133 			    "pthread_mutex_lock");
2134 		if (ch == KEY_BACKSPACE) {
2135 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2136 			return NULL;
2137 		}
2138 		if (view->searching == TOG_SEARCH_FORWARD)
2139 			entry = TAILQ_NEXT(s->search_entry, entry);
2140 		else
2141 			entry = TAILQ_PREV(s->search_entry,
2142 			    commit_queue_head, entry);
2143 	} else if (s->matched_entry) {
2144 		if (view->searching == TOG_SEARCH_FORWARD)
2145 			entry = TAILQ_NEXT(s->matched_entry, entry);
2146 		else
2147 			entry = TAILQ_PREV(s->matched_entry,
2148 			    commit_queue_head, entry);
2149 	} else {
2150 		if (view->searching == TOG_SEARCH_FORWARD)
2151 			entry = TAILQ_FIRST(&s->commits.head);
2152 		else
2153 			entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2154 	}
2155 
2156 	while (1) {
2157 		int have_match = 0;
2158 
2159 		if (entry == NULL) {
2160 			if (s->thread_args.log_complete ||
2161 			    view->searching == TOG_SEARCH_BACKWARD) {
2162 				view->search_next_done =
2163 				    (s->matched_entry == NULL ?
2164 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2165 				s->search_entry = NULL;
2166 				return NULL;
2167 			}
2168 			/*
2169 			 * Poke the log thread for more commits and return,
2170 			 * allowing the main loop to make progress. Search
2171 			 * will resume at s->search_entry once we come back.
2172 			 */
2173 			s->thread_args.commits_needed++;
2174 			return trigger_log_thread(view, 0);
2175 		}
2176 
2177 		err = match_commit(&have_match, entry->id, entry->commit,
2178 		    &view->regex);
2179 		if (err)
2180 			break;
2181 		if (have_match) {
2182 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2183 			s->matched_entry = entry;
2184 			break;
2185 		}
2186 
2187 		s->search_entry = entry;
2188 		if (view->searching == TOG_SEARCH_FORWARD)
2189 			entry = TAILQ_NEXT(entry, entry);
2190 		else
2191 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2192 	}
2193 
2194 	if (s->matched_entry) {
2195 		int cur = s->selected_entry->idx;
2196 		while (cur < s->matched_entry->idx) {
2197 			err = input_log_view(NULL, NULL, NULL, view, KEY_DOWN);
2198 			if (err)
2199 				return err;
2200 			cur++;
2201 		}
2202 		while (cur > s->matched_entry->idx) {
2203 			err = input_log_view(NULL, NULL, NULL, view, KEY_UP);
2204 			if (err)
2205 				return err;
2206 			cur--;
2207 		}
2208 	}
2209 
2210 	s->search_entry = NULL;
2211 
2212 	return NULL;
2213 }
2214 
2215 static const struct got_error *
2216 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2217     struct got_repository *repo, const char *head_ref_name,
2218     const char *in_repo_path, int log_branches)
2219 {
2220 	const struct got_error *err = NULL;
2221 	struct tog_log_view_state *s = &view->state.log;
2222 	struct got_repository *thread_repo = NULL;
2223 	struct got_commit_graph *thread_graph = NULL;
2224 	int errcode;
2225 
2226 	SIMPLEQ_INIT(&s->refs);
2227 
2228 	if (in_repo_path != s->in_repo_path) {
2229 		free(s->in_repo_path);
2230 		s->in_repo_path = strdup(in_repo_path);
2231 		if (s->in_repo_path == NULL)
2232 			return got_error_from_errno("strdup");
2233 	}
2234 
2235 	/* The commit queue only contains commits being displayed. */
2236 	TAILQ_INIT(&s->commits.head);
2237 	s->commits.ncommits = 0;
2238 
2239 	err = got_ref_list(&s->refs, repo, NULL, got_ref_cmp_by_name, NULL);
2240 	if (err)
2241 		goto done;
2242 
2243 	s->repo = repo;
2244 	s->head_ref_name = head_ref_name;
2245 	s->start_id = got_object_id_dup(start_id);
2246 	if (s->start_id == NULL) {
2247 		err = got_error_from_errno("got_object_id_dup");
2248 		goto done;
2249 	}
2250 	s->log_branches = log_branches;
2251 
2252 	SIMPLEQ_INIT(&s->colors);
2253 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2254 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2255 		    get_color_value("TOG_COLOR_COMMIT"));
2256 		if (err)
2257 			goto done;
2258 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2259 		    get_color_value("TOG_COLOR_AUTHOR"));
2260 		if (err) {
2261 			free_colors(&s->colors);
2262 			goto done;
2263 		}
2264 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2265 		    get_color_value("TOG_COLOR_DATE"));
2266 		if (err) {
2267 			free_colors(&s->colors);
2268 			goto done;
2269 		}
2270 	}
2271 
2272 	view->show = show_log_view;
2273 	view->input = input_log_view;
2274 	view->close = close_log_view;
2275 	view->search_start = search_start_log_view;
2276 	view->search_next = search_next_log_view;
2277 
2278 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL);
2279 	if (err)
2280 		goto done;
2281 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2282 	    !s->log_branches);
2283 	if (err)
2284 		goto done;
2285 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2286 	    s->repo, NULL, NULL);
2287 	if (err)
2288 		goto done;
2289 
2290 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2291 	if (errcode) {
2292 		err = got_error_set_errno(errcode, "pthread_cond_init");
2293 		goto done;
2294 	}
2295 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2296 	if (errcode) {
2297 		err = got_error_set_errno(errcode, "pthread_cond_init");
2298 		goto done;
2299 	}
2300 
2301 	s->thread_args.commits_needed = view->nlines;
2302 	s->thread_args.graph = thread_graph;
2303 	s->thread_args.commits = &s->commits;
2304 	s->thread_args.in_repo_path = s->in_repo_path;
2305 	s->thread_args.start_id = s->start_id;
2306 	s->thread_args.repo = thread_repo;
2307 	s->thread_args.log_complete = 0;
2308 	s->thread_args.quit = &s->quit;
2309 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2310 	s->thread_args.selected_entry = &s->selected_entry;
2311 	s->thread_args.searching = &view->searching;
2312 	s->thread_args.search_next_done = &view->search_next_done;
2313 	s->thread_args.regex = &view->regex;
2314 done:
2315 	if (err)
2316 		close_log_view(view);
2317 	return err;
2318 }
2319 
2320 static const struct got_error *
2321 show_log_view(struct tog_view *view)
2322 {
2323 	const struct got_error *err;
2324 	struct tog_log_view_state *s = &view->state.log;
2325 
2326 	if (s->thread == NULL) {
2327 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2328 		    &s->thread_args);
2329 		if (errcode)
2330 			return got_error_set_errno(errcode, "pthread_create");
2331 		if (s->thread_args.commits_needed > 0) {
2332 			err = trigger_log_thread(view, 1);
2333 			if (err)
2334 				return err;
2335 		}
2336 	}
2337 
2338 	return draw_commits(view);
2339 }
2340 
2341 static const struct got_error *
2342 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
2343     struct tog_view **focus_view, struct tog_view *view, int ch)
2344 {
2345 	const struct got_error *err = NULL;
2346 	struct tog_log_view_state *s = &view->state.log;
2347 	char *parent_path, *in_repo_path = NULL;
2348 	struct tog_view *diff_view = NULL, *tree_view = NULL, *lv = NULL;
2349 	struct tog_view *ref_view = NULL;
2350 	int begin_x = 0;
2351 	struct got_object_id *start_id;
2352 
2353 	switch (ch) {
2354 	case 'q':
2355 		s->quit = 1;
2356 		break;
2357 	case 'k':
2358 	case KEY_UP:
2359 	case '<':
2360 	case ',':
2361 		if (s->first_displayed_entry == NULL)
2362 			break;
2363 		if (s->selected > 0)
2364 			s->selected--;
2365 		else
2366 			log_scroll_up(view, 1);
2367 		break;
2368 	case KEY_PPAGE:
2369 	case CTRL('b'):
2370 		if (s->first_displayed_entry == NULL)
2371 			break;
2372 		if (TAILQ_FIRST(&s->commits.head) ==
2373 		    s->first_displayed_entry) {
2374 			s->selected = 0;
2375 			break;
2376 		}
2377 		log_scroll_up(view, view->nlines - 1);
2378 		break;
2379 	case 'j':
2380 	case KEY_DOWN:
2381 	case '>':
2382 	case '.':
2383 		if (s->first_displayed_entry == NULL)
2384 			break;
2385 		if (s->selected < MIN(view->nlines - 2,
2386 		    s->commits.ncommits - 1)) {
2387 			s->selected++;
2388 			break;
2389 		}
2390 		err = log_scroll_down(view, 1);
2391 		break;
2392 	case KEY_NPAGE:
2393 	case CTRL('f'): {
2394 		struct commit_queue_entry *first;
2395 		first = s->first_displayed_entry;
2396 		if (first == NULL)
2397 			break;
2398 		err = log_scroll_down(view, view->nlines - 1);
2399 		if (err)
2400 			break;
2401 		if (first == s->first_displayed_entry &&
2402 		    s->selected < MIN(view->nlines - 2,
2403 		    s->commits.ncommits - 1)) {
2404 			/* can't scroll further down */
2405 			s->selected = MIN(view->nlines - 2,
2406 			    s->commits.ncommits - 1);
2407 		}
2408 		err = NULL;
2409 		break;
2410 	}
2411 	case KEY_RESIZE:
2412 		if (s->selected > view->nlines - 2)
2413 			s->selected = view->nlines - 2;
2414 		if (s->selected > s->commits.ncommits - 1)
2415 			s->selected = s->commits.ncommits - 1;
2416 		break;
2417 	case KEY_ENTER:
2418 	case ' ':
2419 	case '\r':
2420 		if (s->selected_entry == NULL)
2421 			break;
2422 		if (view_is_parent_view(view))
2423 			begin_x = view_split_begin_x(view->begin_x);
2424 		err = open_diff_view_for_commit(&diff_view, begin_x,
2425 		    s->selected_entry->commit, s->selected_entry->id,
2426 		    view, s->repo);
2427 		if (err)
2428 			break;
2429 		if (view_is_parent_view(view)) {
2430 			err = view_close_child(view);
2431 			if (err)
2432 				return err;
2433 			err = view_set_child(view, diff_view);
2434 			if (err) {
2435 				view_close(diff_view);
2436 				break;
2437 			}
2438 			*focus_view = diff_view;
2439 			view->child_focussed = 1;
2440 		} else
2441 			*new_view = diff_view;
2442 		break;
2443 	case 't':
2444 		if (s->selected_entry == NULL)
2445 			break;
2446 		if (view_is_parent_view(view))
2447 			begin_x = view_split_begin_x(view->begin_x);
2448 		err = browse_commit_tree(&tree_view, begin_x,
2449 		    s->selected_entry, s->in_repo_path, s->repo);
2450 		if (err)
2451 			break;
2452 		if (view_is_parent_view(view)) {
2453 			err = view_close_child(view);
2454 			if (err)
2455 				return err;
2456 			err = view_set_child(view, tree_view);
2457 			if (err) {
2458 				view_close(tree_view);
2459 				break;
2460 			}
2461 			*focus_view = tree_view;
2462 			view->child_focussed = 1;
2463 		} else
2464 			*new_view = tree_view;
2465 		break;
2466 	case KEY_BACKSPACE:
2467 		if (got_path_cmp(s->in_repo_path, "/",
2468 		    strlen(s->in_repo_path), 1) == 0)
2469 			break;
2470 		err = got_path_dirname(&parent_path, s->in_repo_path);
2471 		if (err)
2472 			return err;
2473 		err = stop_log_thread(s);
2474 		if (err) {
2475 			free(parent_path);
2476 			return err;
2477 		}
2478 		lv = view_open(view->nlines, view->ncols,
2479 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2480 		if (lv == NULL) {
2481 			free(parent_path);
2482 			return got_error_from_errno("view_open");
2483 		}
2484 		err = open_log_view(lv, s->start_id, s->repo, s->head_ref_name,
2485 		    parent_path, s->log_branches);
2486 		free(parent_path);
2487 		if (err)
2488 			return err;;
2489 		if (view_is_parent_view(view))
2490 			*new_view = lv;
2491 		else {
2492 			view_set_child(view->parent, lv);
2493 			*focus_view = lv;
2494 		}
2495 		break;
2496 	case CTRL('l'):
2497 		err = stop_log_thread(s);
2498 		if (err)
2499 			return err;
2500 		lv = view_open(view->nlines, view->ncols,
2501 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2502 		if (lv == NULL)
2503 			return got_error_from_errno("view_open");
2504 		err = got_repo_match_object_id(&start_id, NULL,
2505 		    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2506 		    GOT_OBJ_TYPE_COMMIT, 1, s->repo);
2507 		if (err) {
2508 			view_close(lv);
2509 			return err;
2510 		}
2511 		in_repo_path = strdup(s->in_repo_path);
2512 		if (in_repo_path == NULL) {
2513 			free(start_id);
2514 			view_close(lv);
2515 			return got_error_from_errno("strdup");
2516 		}
2517 		err = open_log_view(lv, start_id, s->repo, s->head_ref_name,
2518 		    in_repo_path, s->log_branches);
2519 		if (err) {
2520 			free(start_id);
2521 			view_close(lv);
2522 			return err;;
2523 		}
2524 		*dead_view = view;
2525 		*new_view = lv;
2526 		break;
2527 	case 'B':
2528 		s->log_branches = !s->log_branches;
2529 		err = stop_log_thread(s);
2530 		if (err)
2531 			return err;
2532 		lv = view_open(view->nlines, view->ncols,
2533 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2534 		if (lv == NULL)
2535 			return got_error_from_errno("view_open");
2536 		err = open_log_view(lv, s->start_id, s->repo,
2537 		    s->head_ref_name, s->in_repo_path, s->log_branches);
2538 		if (err) {
2539 			view_close(lv);
2540 			return err;;
2541 		}
2542 		*dead_view = view;
2543 		*new_view = lv;
2544 		break;
2545 	case 'r':
2546 		if (view_is_parent_view(view))
2547 			begin_x = view_split_begin_x(view->begin_x);
2548 		ref_view = view_open(view->nlines, view->ncols,
2549 		    view->begin_y, begin_x, TOG_VIEW_REF);
2550 		if (ref_view == NULL)
2551 			return got_error_from_errno("view_open");
2552 		err = open_ref_view(ref_view, s->repo);
2553 		if (err) {
2554 			view_close(ref_view);
2555 			return err;
2556 		}
2557 		if (view_is_parent_view(view)) {
2558 			err = view_close_child(view);
2559 			if (err)
2560 				return err;
2561 			err = view_set_child(view, ref_view);
2562 			if (err) {
2563 				view_close(ref_view);
2564 				break;
2565 			}
2566 			*focus_view = ref_view;
2567 			view->child_focussed = 1;
2568 		} else
2569 			*new_view = ref_view;
2570 		break;
2571 	default:
2572 		break;
2573 	}
2574 
2575 	return err;
2576 }
2577 
2578 static const struct got_error *
2579 apply_unveil(const char *repo_path, const char *worktree_path)
2580 {
2581 	const struct got_error *error;
2582 
2583 #ifdef PROFILE
2584 	if (unveil("gmon.out", "rwc") != 0)
2585 		return got_error_from_errno2("unveil", "gmon.out");
2586 #endif
2587 	if (repo_path && unveil(repo_path, "r") != 0)
2588 		return got_error_from_errno2("unveil", repo_path);
2589 
2590 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2591 		return got_error_from_errno2("unveil", worktree_path);
2592 
2593 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2594 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2595 
2596 	error = got_privsep_unveil_exec_helpers();
2597 	if (error != NULL)
2598 		return error;
2599 
2600 	if (unveil(NULL, NULL) != 0)
2601 		return got_error_from_errno("unveil");
2602 
2603 	return NULL;
2604 }
2605 
2606 static void
2607 init_curses(void)
2608 {
2609 	initscr();
2610 	cbreak();
2611 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2612 	noecho();
2613 	nonl();
2614 	intrflush(stdscr, FALSE);
2615 	keypad(stdscr, TRUE);
2616 	curs_set(0);
2617 	if (getenv("TOG_COLORS") != NULL) {
2618 		start_color();
2619 		use_default_colors();
2620 	}
2621 	signal(SIGWINCH, tog_sigwinch);
2622 	signal(SIGPIPE, tog_sigpipe);
2623 	signal(SIGCONT, tog_sigcont);
2624 }
2625 
2626 static const struct got_error *
2627 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2628     struct got_repository *repo, struct got_worktree *worktree)
2629 {
2630 	const struct got_error *err = NULL;
2631 
2632 	if (argc == 0) {
2633 		*in_repo_path = strdup("/");
2634 		if (*in_repo_path == NULL)
2635 			return got_error_from_errno("strdup");
2636 		return NULL;
2637 	}
2638 
2639 	if (worktree) {
2640 		const char *prefix = got_worktree_get_path_prefix(worktree);
2641 		char *p;
2642 
2643 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2644 		if (err)
2645 			return err;
2646 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2647 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2648 		    p) == -1) {
2649 			err = got_error_from_errno("asprintf");
2650 			*in_repo_path = NULL;
2651 		}
2652 		free(p);
2653 	} else
2654 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2655 
2656 	return err;
2657 }
2658 
2659 static const struct got_error *
2660 cmd_log(int argc, char *argv[])
2661 {
2662 	const struct got_error *error;
2663 	struct got_repository *repo = NULL;
2664 	struct got_worktree *worktree = NULL;
2665 	struct got_object_id *start_id = NULL;
2666 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2667 	char *start_commit = NULL, *head_ref_name = NULL;
2668 	int ch, log_branches = 0;
2669 	struct tog_view *view;
2670 
2671 #ifndef PROFILE
2672 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2673 	    NULL) == -1)
2674 		err(1, "pledge");
2675 #endif
2676 
2677 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2678 		switch (ch) {
2679 		case 'b':
2680 			log_branches = 1;
2681 			break;
2682 		case 'c':
2683 			start_commit = optarg;
2684 			break;
2685 		case 'r':
2686 			repo_path = realpath(optarg, NULL);
2687 			if (repo_path == NULL)
2688 				return got_error_from_errno2("realpath",
2689 				    optarg);
2690 			break;
2691 		default:
2692 			usage_log();
2693 			/* NOTREACHED */
2694 		}
2695 	}
2696 
2697 	argc -= optind;
2698 	argv += optind;
2699 
2700 	if (argc > 1)
2701 		usage_log();
2702 
2703 	cwd = getcwd(NULL, 0);
2704 	if (cwd == NULL)
2705 		return got_error_from_errno("getcwd");
2706 
2707 	error = got_worktree_open(&worktree, cwd);
2708 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
2709 		goto done;
2710 
2711 	if (repo_path == NULL) {
2712 		if (worktree)
2713 			repo_path =
2714 			    strdup(got_worktree_get_repo_path(worktree));
2715 		else
2716 			repo_path = strdup(cwd);
2717 	}
2718 	if (repo_path == NULL) {
2719 		error = got_error_from_errno("strdup");
2720 		goto done;
2721 	}
2722 
2723 	error = got_repo_open(&repo, repo_path, NULL);
2724 	if (error != NULL)
2725 		goto done;
2726 
2727 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
2728 	    repo, worktree);
2729 	if (error)
2730 		goto done;
2731 
2732 	init_curses();
2733 
2734 	error = apply_unveil(got_repo_get_path(repo),
2735 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2736 	if (error)
2737 		goto done;
2738 
2739 	if (start_commit == NULL)
2740 		error = got_repo_match_object_id(&start_id, NULL, worktree ?
2741 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
2742 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2743 	else
2744 		error = got_repo_match_object_id(&start_id, NULL, start_commit,
2745 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2746 	if (error != NULL)
2747 		goto done;
2748 
2749 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2750 	if (view == NULL) {
2751 		error = got_error_from_errno("view_open");
2752 		goto done;
2753 	}
2754 	if (worktree) {
2755 		head_ref_name = strdup(
2756 		    got_worktree_get_head_ref_name(worktree));
2757 		if (head_ref_name == NULL) {
2758 			error = got_error_from_errno("strdup");
2759 			goto done;
2760 		}
2761 	}
2762 	error = open_log_view(view, start_id, repo, head_ref_name,
2763 	    in_repo_path, log_branches);
2764 	if (error)
2765 		goto done;
2766 	if (worktree) {
2767 		/* Release work tree lock. */
2768 		got_worktree_close(worktree);
2769 		worktree = NULL;
2770 	}
2771 	error = view_loop(view);
2772 done:
2773 	free(in_repo_path);
2774 	free(repo_path);
2775 	free(cwd);
2776 	free(start_id);
2777 	free(head_ref_name);
2778 	if (repo)
2779 		got_repo_close(repo);
2780 	if (worktree)
2781 		got_worktree_close(worktree);
2782 	return error;
2783 }
2784 
2785 __dead static void
2786 usage_diff(void)
2787 {
2788 	endwin();
2789 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
2790 	    "[-w] object1 object2\n", getprogname());
2791 	exit(1);
2792 }
2793 
2794 static char *
2795 parse_next_line(FILE *f, size_t *len)
2796 {
2797 	char *line;
2798 	size_t linelen;
2799 	size_t lineno;
2800 	const char delim[3] = { '\0', '\0', '\0'};
2801 
2802 	line = fparseln(f, &linelen, &lineno, delim, 0);
2803 	if (len)
2804 		*len = linelen;
2805 	return line;
2806 }
2807 
2808 static int
2809 match_line(const char *line, regex_t *regex, size_t nmatch,
2810     regmatch_t *regmatch)
2811 {
2812 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
2813 }
2814 
2815 struct tog_color *
2816 match_color(struct tog_colors *colors, const char *line)
2817 {
2818 	struct tog_color *tc = NULL;
2819 
2820 	SIMPLEQ_FOREACH(tc, colors, entry) {
2821 		if (match_line(line, &tc->regex, 0, NULL))
2822 			return tc;
2823 	}
2824 
2825 	return NULL;
2826 }
2827 
2828 static const struct got_error *
2829 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
2830     WINDOW *window, regmatch_t *regmatch)
2831 {
2832 	const struct got_error *err = NULL;
2833 	wchar_t *wline;
2834 	int width;
2835 	char *s;
2836 
2837 	*wtotal = 0;
2838 
2839 	s = strndup(line, regmatch->rm_so);
2840 	if (s == NULL)
2841 		return got_error_from_errno("strndup");
2842 
2843 	err = format_line(&wline, &width, s, wlimit, col_tab_align);
2844 	if (err) {
2845 		free(s);
2846 		return err;
2847 	}
2848 	waddwstr(window, wline);
2849 	free(wline);
2850 	free(s);
2851 	wlimit -= width;
2852 	*wtotal += width;
2853 
2854 	if (wlimit > 0) {
2855 		s = strndup(line + regmatch->rm_so,
2856 		    regmatch->rm_eo - regmatch->rm_so);
2857 		if (s == NULL) {
2858 			err = got_error_from_errno("strndup");
2859 			free(s);
2860 			return err;
2861 		}
2862 		err = format_line(&wline, &width, s, wlimit, col_tab_align);
2863 		if (err) {
2864 			free(s);
2865 			return err;
2866 		}
2867 		wattr_on(window, A_STANDOUT, NULL);
2868 		waddwstr(window, wline);
2869 		wattr_off(window, A_STANDOUT, NULL);
2870 		free(wline);
2871 		free(s);
2872 		wlimit -= width;
2873 		*wtotal += width;
2874 	}
2875 
2876 	if (wlimit > 0 && strlen(line) > regmatch->rm_eo) {
2877 		err = format_line(&wline, &width,
2878 		     line + regmatch->rm_eo, wlimit, col_tab_align);
2879 		if (err)
2880 			return err;
2881 		waddwstr(window, wline);
2882 		free(wline);
2883 		*wtotal += width;
2884 	}
2885 
2886 	return NULL;
2887 }
2888 
2889 static const struct got_error *
2890 draw_file(struct tog_view *view, const char *header)
2891 {
2892 	struct tog_diff_view_state *s = &view->state.diff;
2893 	regmatch_t *regmatch = &view->regmatch;
2894 	const struct got_error *err;
2895 	int nprinted = 0;
2896 	char *line;
2897 	struct tog_color *tc;
2898 	size_t len;
2899 	wchar_t *wline;
2900 	int width;
2901 	int max_lines = view->nlines;
2902 	int nlines = s->nlines;
2903 	off_t line_offset;
2904 
2905 	line_offset = s->line_offsets[s->first_displayed_line - 1];
2906 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
2907 		return got_error_from_errno("fseek");
2908 
2909 	werase(view->window);
2910 
2911 	if (header) {
2912 		if (asprintf(&line, "[%d/%d] %s",
2913 		    s->first_displayed_line - 1 + s->selected_line, nlines,
2914 		    header) == -1)
2915 			return got_error_from_errno("asprintf");
2916 		err = format_line(&wline, &width, line, view->ncols, 0);
2917 		free(line);
2918 		if (err)
2919 			return err;
2920 
2921 		if (view_needs_focus_indication(view))
2922 			wstandout(view->window);
2923 		waddwstr(view->window, wline);
2924 		free(wline);
2925 		wline = NULL;
2926 		if (view_needs_focus_indication(view))
2927 			wstandend(view->window);
2928 		if (width <= view->ncols - 1)
2929 			waddch(view->window, '\n');
2930 
2931 		if (max_lines <= 1)
2932 			return NULL;
2933 		max_lines--;
2934 	}
2935 
2936 	s->eof = 0;
2937 	while (max_lines > 0 && nprinted < max_lines) {
2938 		line = parse_next_line(s->f, &len);
2939 		if (line == NULL) {
2940 			s->eof = 1;
2941 			break;
2942 		}
2943 
2944 		tc = match_color(&s->colors, line);
2945 		if (tc)
2946 			wattr_on(view->window,
2947 			    COLOR_PAIR(tc->colorpair), NULL);
2948 		if (s->first_displayed_line + nprinted == s->matched_line &&
2949 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
2950 			err = add_matched_line(&width, line, view->ncols, 0,
2951 			    view->window, regmatch);
2952 			if (err) {
2953 				free(line);
2954 				return err;
2955 			}
2956 		} else {
2957 			err = format_line(&wline, &width, line, view->ncols, 0);
2958 			if (err) {
2959 				free(line);
2960 				return err;
2961 			}
2962 			waddwstr(view->window, wline);
2963 			free(wline);
2964 			wline = NULL;
2965 		}
2966 		if (tc)
2967 			wattr_off(view->window,
2968 			    COLOR_PAIR(tc->colorpair), NULL);
2969 		if (width <= view->ncols - 1)
2970 			waddch(view->window, '\n');
2971 		nprinted++;
2972 		free(line);
2973 	}
2974 	if (nprinted >= 1)
2975 		s->last_displayed_line = s->first_displayed_line +
2976 		    (nprinted - 1);
2977 	else
2978 		s->last_displayed_line = s->first_displayed_line;
2979 
2980 	view_vborder(view);
2981 
2982 	if (s->eof) {
2983 		while (nprinted < view->nlines) {
2984 			waddch(view->window, '\n');
2985 			nprinted++;
2986 		}
2987 
2988 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols, 0);
2989 		if (err) {
2990 			return err;
2991 		}
2992 
2993 		wstandout(view->window);
2994 		waddwstr(view->window, wline);
2995 		free(wline);
2996 		wline = NULL;
2997 		wstandend(view->window);
2998 	}
2999 
3000 	return NULL;
3001 }
3002 
3003 static char *
3004 get_datestr(time_t *time, char *datebuf)
3005 {
3006 	struct tm mytm, *tm;
3007 	char *p, *s;
3008 
3009 	tm = gmtime_r(time, &mytm);
3010 	if (tm == NULL)
3011 		return NULL;
3012 	s = asctime_r(tm, datebuf);
3013 	if (s == NULL)
3014 		return NULL;
3015 	p = strchr(s, '\n');
3016 	if (p)
3017 		*p = '\0';
3018 	return s;
3019 }
3020 
3021 static const struct got_error *
3022 get_changed_paths(struct got_pathlist_head *paths,
3023     struct got_commit_object *commit, struct got_repository *repo)
3024 {
3025 	const struct got_error *err = NULL;
3026 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3027 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3028 	struct got_object_qid *qid;
3029 
3030 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
3031 	if (qid != NULL) {
3032 		struct got_commit_object *pcommit;
3033 		err = got_object_open_as_commit(&pcommit, repo,
3034 		    qid->id);
3035 		if (err)
3036 			return err;
3037 
3038 		tree_id1 = got_object_commit_get_tree_id(pcommit);
3039 		got_object_commit_close(pcommit);
3040 
3041 	}
3042 
3043 	if (tree_id1) {
3044 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3045 		if (err)
3046 			goto done;
3047 	}
3048 
3049 	tree_id2 = got_object_commit_get_tree_id(commit);
3050 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3051 	if (err)
3052 		goto done;
3053 
3054 	err = got_diff_tree(tree1, tree2, "", "", repo,
3055 	    got_diff_tree_collect_changed_paths, paths, 0);
3056 done:
3057 	if (tree1)
3058 		got_object_tree_close(tree1);
3059 	if (tree2)
3060 		got_object_tree_close(tree2);
3061 	return err;
3062 }
3063 
3064 static const struct got_error *
3065 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3066 {
3067 	off_t *p;
3068 
3069 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3070 	if (p == NULL)
3071 		return got_error_from_errno("reallocarray");
3072 	*line_offsets = p;
3073 	(*line_offsets)[*nlines] = off;
3074 	(*nlines)++;
3075 	return NULL;
3076 }
3077 
3078 static const struct got_error *
3079 write_commit_info(off_t **line_offsets, size_t *nlines,
3080     struct got_object_id *commit_id, struct got_reflist_head *refs,
3081     struct got_repository *repo, FILE *outfile)
3082 {
3083 	const struct got_error *err = NULL;
3084 	char datebuf[26], *datestr;
3085 	struct got_commit_object *commit;
3086 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3087 	time_t committer_time;
3088 	const char *author, *committer;
3089 	char *refs_str = NULL;
3090 	struct got_pathlist_head changed_paths;
3091 	struct got_pathlist_entry *pe;
3092 	off_t outoff = 0;
3093 	int n;
3094 
3095 	TAILQ_INIT(&changed_paths);
3096 
3097 	if (refs) {
3098 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3099 		if (err)
3100 			return err;
3101 	}
3102 
3103 	err = got_object_open_as_commit(&commit, repo, commit_id);
3104 	if (err)
3105 		return err;
3106 
3107 	err = got_object_id_str(&id_str, commit_id);
3108 	if (err) {
3109 		err = got_error_from_errno("got_object_id_str");
3110 		goto done;
3111 	}
3112 
3113 	err = add_line_offset(line_offsets, nlines, 0);
3114 	if (err)
3115 		goto done;
3116 
3117 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3118 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3119 	if (n < 0) {
3120 		err = got_error_from_errno("fprintf");
3121 		goto done;
3122 	}
3123 	outoff += n;
3124 	err = add_line_offset(line_offsets, nlines, outoff);
3125 	if (err)
3126 		goto done;
3127 
3128 	n = fprintf(outfile, "from: %s\n",
3129 	    got_object_commit_get_author(commit));
3130 	if (n < 0) {
3131 		err = got_error_from_errno("fprintf");
3132 		goto done;
3133 	}
3134 	outoff += n;
3135 	err = add_line_offset(line_offsets, nlines, outoff);
3136 	if (err)
3137 		goto done;
3138 
3139 	committer_time = got_object_commit_get_committer_time(commit);
3140 	datestr = get_datestr(&committer_time, datebuf);
3141 	if (datestr) {
3142 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3143 		if (n < 0) {
3144 			err = got_error_from_errno("fprintf");
3145 			goto done;
3146 		}
3147 		outoff += n;
3148 		err = add_line_offset(line_offsets, nlines, outoff);
3149 		if (err)
3150 			goto done;
3151 	}
3152 	author = got_object_commit_get_author(commit);
3153 	committer = got_object_commit_get_committer(commit);
3154 	if (strcmp(author, committer) != 0) {
3155 		n = fprintf(outfile, "via: %s\n", committer);
3156 		if (n < 0) {
3157 			err = got_error_from_errno("fprintf");
3158 			goto done;
3159 		}
3160 		outoff += n;
3161 		err = add_line_offset(line_offsets, nlines, outoff);
3162 		if (err)
3163 			goto done;
3164 	}
3165 	err = got_object_commit_get_logmsg(&logmsg, commit);
3166 	if (err)
3167 		goto done;
3168 	s = logmsg;
3169 	while ((line = strsep(&s, "\n")) != NULL) {
3170 		n = fprintf(outfile, "%s\n", line);
3171 		if (n < 0) {
3172 			err = got_error_from_errno("fprintf");
3173 			goto done;
3174 		}
3175 		outoff += n;
3176 		err = add_line_offset(line_offsets, nlines, outoff);
3177 		if (err)
3178 			goto done;
3179 	}
3180 
3181 	err = get_changed_paths(&changed_paths, commit, repo);
3182 	if (err)
3183 		goto done;
3184 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3185 		struct got_diff_changed_path *cp = pe->data;
3186 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3187 		if (n < 0) {
3188 			err = got_error_from_errno("fprintf");
3189 			goto done;
3190 		}
3191 		outoff += n;
3192 		err = add_line_offset(line_offsets, nlines, outoff);
3193 		if (err)
3194 			goto done;
3195 		free((char *)pe->path);
3196 		free(pe->data);
3197 	}
3198 
3199 	fputc('\n', outfile);
3200 	outoff++;
3201 	err = add_line_offset(line_offsets, nlines, outoff);
3202 done:
3203 	got_pathlist_free(&changed_paths);
3204 	free(id_str);
3205 	free(logmsg);
3206 	free(refs_str);
3207 	got_object_commit_close(commit);
3208 	if (err) {
3209 		free(*line_offsets);
3210 		*line_offsets = NULL;
3211 		*nlines = 0;
3212 	}
3213 	return err;
3214 }
3215 
3216 static const struct got_error *
3217 create_diff(struct tog_diff_view_state *s)
3218 {
3219 	const struct got_error *err = NULL;
3220 	FILE *f = NULL;
3221 	int obj_type;
3222 
3223 	free(s->line_offsets);
3224 	s->line_offsets = malloc(sizeof(off_t));
3225 	if (s->line_offsets == NULL)
3226 		return got_error_from_errno("malloc");
3227 	s->nlines = 0;
3228 
3229 	f = got_opentemp();
3230 	if (f == NULL) {
3231 		err = got_error_from_errno("got_opentemp");
3232 		goto done;
3233 	}
3234 	if (s->f && fclose(s->f) != 0) {
3235 		err = got_error_from_errno("fclose");
3236 		goto done;
3237 	}
3238 	s->f = f;
3239 
3240 	if (s->id1)
3241 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3242 	else
3243 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3244 	if (err)
3245 		goto done;
3246 
3247 	switch (obj_type) {
3248 	case GOT_OBJ_TYPE_BLOB:
3249 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3250 		    s->id1, s->id2, s->label1, s->label2, s->diff_context,
3251 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3252 		break;
3253 	case GOT_OBJ_TYPE_TREE:
3254 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3255 		    s->id1, s->id2, "", "", s->diff_context,
3256 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3257 		break;
3258 	case GOT_OBJ_TYPE_COMMIT: {
3259 		const struct got_object_id_queue *parent_ids;
3260 		struct got_object_qid *pid;
3261 		struct got_commit_object *commit2;
3262 
3263 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3264 		if (err)
3265 			goto done;
3266 		/* Show commit info if we're diffing to a parent/root commit. */
3267 		if (s->id1 == NULL) {
3268 			err = write_commit_info(&s->line_offsets, &s->nlines,
3269 			    s->id2, &s->refs, s->repo, s->f);
3270 			if (err)
3271 				goto done;
3272 		} else {
3273 			parent_ids = got_object_commit_get_parent_ids(commit2);
3274 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
3275 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
3276 					err = write_commit_info(
3277 					    &s->line_offsets, &s->nlines,
3278 					    s->id2, &s->refs, s->repo, s->f);
3279 					if (err)
3280 						goto done;
3281 					break;
3282 				}
3283 			}
3284 		}
3285 		got_object_commit_close(commit2);
3286 
3287 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3288 		    s->id1, s->id2, s->diff_context, s->ignore_whitespace,
3289 		    s->force_text_diff, s->repo, s->f);
3290 		break;
3291 	}
3292 	default:
3293 		err = got_error(GOT_ERR_OBJ_TYPE);
3294 		break;
3295 	}
3296 	if (err)
3297 		goto done;
3298 done:
3299 	if (s->f && fflush(s->f) != 0 && err == NULL)
3300 		err = got_error_from_errno("fflush");
3301 	return err;
3302 }
3303 
3304 static void
3305 diff_view_indicate_progress(struct tog_view *view)
3306 {
3307 	mvwaddstr(view->window, 0, 0, "diffing...");
3308 	update_panels();
3309 	doupdate();
3310 }
3311 
3312 static const struct got_error *
3313 search_start_diff_view(struct tog_view *view)
3314 {
3315 	struct tog_diff_view_state *s = &view->state.diff;
3316 
3317 	s->matched_line = 0;
3318 	return NULL;
3319 }
3320 
3321 static const struct got_error *
3322 search_next_diff_view(struct tog_view *view)
3323 {
3324 	struct tog_diff_view_state *s = &view->state.diff;
3325 	int lineno;
3326 
3327 	if (!view->searching) {
3328 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3329 		return NULL;
3330 	}
3331 
3332 	if (s->matched_line) {
3333 		if (view->searching == TOG_SEARCH_FORWARD)
3334 			lineno = s->matched_line + 1;
3335 		else
3336 			lineno = s->matched_line - 1;
3337 	} else {
3338 		if (view->searching == TOG_SEARCH_FORWARD)
3339 			lineno = 1;
3340 		else
3341 			lineno = s->nlines;
3342 	}
3343 
3344 	while (1) {
3345 		char *line = NULL;
3346 		off_t offset;
3347 		size_t len;
3348 
3349 		if (lineno <= 0 || lineno > s->nlines) {
3350 			if (s->matched_line == 0) {
3351 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3352 				free(line);
3353 				break;
3354 			}
3355 
3356 			if (view->searching == TOG_SEARCH_FORWARD)
3357 				lineno = 1;
3358 			else
3359 				lineno = s->nlines;
3360 		}
3361 
3362 		offset = s->line_offsets[lineno - 1];
3363 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3364 			free(line);
3365 			return got_error_from_errno("fseeko");
3366 		}
3367 		free(line);
3368 		line = parse_next_line(s->f, &len);
3369 		if (line &&
3370 		    match_line(line, &view->regex, 1, &view->regmatch)) {
3371 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3372 			s->matched_line = lineno;
3373 			free(line);
3374 			break;
3375 		}
3376 		free(line);
3377 		if (view->searching == TOG_SEARCH_FORWARD)
3378 			lineno++;
3379 		else
3380 			lineno--;
3381 	}
3382 
3383 	if (s->matched_line) {
3384 		s->first_displayed_line = s->matched_line;
3385 		s->selected_line = 1;
3386 	}
3387 
3388 	return NULL;
3389 }
3390 
3391 static const struct got_error *
3392 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3393     struct got_object_id *id2, const char *label1, const char *label2,
3394     int diff_context, int ignore_whitespace, int force_text_diff,
3395     struct tog_view *log_view, struct got_repository *repo)
3396 {
3397 	const struct got_error *err;
3398 	struct tog_diff_view_state *s = &view->state.diff;
3399 
3400 	SIMPLEQ_INIT(&s->refs);
3401 
3402 	if (id1 != NULL && id2 != NULL) {
3403 	    int type1, type2;
3404 	    err = got_object_get_type(&type1, repo, id1);
3405 	    if (err)
3406 		return err;
3407 	    err = got_object_get_type(&type2, repo, id2);
3408 	    if (err)
3409 		return err;
3410 
3411 	    if (type1 != type2)
3412 		return got_error(GOT_ERR_OBJ_TYPE);
3413 	}
3414 	s->first_displayed_line = 1;
3415 	s->last_displayed_line = view->nlines;
3416 	s->selected_line = 1;
3417 	s->repo = repo;
3418 	s->id1 = id1;
3419 	s->id2 = id2;
3420 	s->label1 = label1;
3421 	s->label2 = label2;
3422 
3423 	if (id1) {
3424 		s->id1 = got_object_id_dup(id1);
3425 		if (s->id1 == NULL)
3426 			return got_error_from_errno("got_object_id_dup");
3427 	} else
3428 		s->id1 = NULL;
3429 
3430 	s->id2 = got_object_id_dup(id2);
3431 	if (s->id2 == NULL) {
3432 		free(s->id1);
3433 		s->id1 = NULL;
3434 		return got_error_from_errno("got_object_id_dup");
3435 	}
3436 	s->f = NULL;
3437 	s->first_displayed_line = 1;
3438 	s->last_displayed_line = view->nlines;
3439 	s->diff_context = diff_context;
3440 	s->ignore_whitespace = ignore_whitespace;
3441 	s->force_text_diff = force_text_diff;
3442 	s->log_view = log_view;
3443 	s->repo = repo;
3444 
3445 	SIMPLEQ_INIT(&s->colors);
3446 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3447 		err = add_color(&s->colors,
3448 		    "^-", TOG_COLOR_DIFF_MINUS,
3449 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3450 		if (err)
3451 			return err;
3452 		err = add_color(&s->colors, "^\\+",
3453 		    TOG_COLOR_DIFF_PLUS,
3454 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3455 		if (err) {
3456 			free_colors(&s->colors);
3457 			return err;
3458 		}
3459 		err = add_color(&s->colors,
3460 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3461 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3462 		if (err) {
3463 			free_colors(&s->colors);
3464 			return err;
3465 		}
3466 
3467 		err = add_color(&s->colors,
3468 		    "^(commit [0-9a-f]|(blob|file) [-+] |[MDmA]  [^ ])",
3469 		    TOG_COLOR_DIFF_META,
3470 		    get_color_value("TOG_COLOR_DIFF_META"));
3471 		if (err) {
3472 			free_colors(&s->colors);
3473 			return err;
3474 		}
3475 
3476 		err = add_color(&s->colors,
3477 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3478 		    get_color_value("TOG_COLOR_AUTHOR"));
3479 		if (err) {
3480 			free_colors(&s->colors);
3481 			return err;
3482 		}
3483 
3484 		err = add_color(&s->colors,
3485 		    "^date: ", TOG_COLOR_DATE,
3486 		    get_color_value("TOG_COLOR_DATE"));
3487 		if (err) {
3488 			free_colors(&s->colors);
3489 			return err;
3490 		}
3491 	}
3492 
3493 	err = got_ref_list(&s->refs, repo, NULL, got_ref_cmp_by_name, NULL);
3494 	if (err) {
3495 		free(s->id1);
3496 		s->id1 = NULL;
3497 		free(s->id2);
3498 		s->id2 = NULL;
3499 		free_colors(&s->colors);
3500 		return err;
3501 	}
3502 
3503 	if (log_view && view_is_splitscreen(view))
3504 		show_log_view(log_view); /* draw vborder */
3505 	diff_view_indicate_progress(view);
3506 
3507 	s->line_offsets = NULL;
3508 	s->nlines = 0;
3509 	err = create_diff(s);
3510 	if (err) {
3511 		free(s->id1);
3512 		s->id1 = NULL;
3513 		free(s->id2);
3514 		s->id2 = NULL;
3515 		free_colors(&s->colors);
3516 		got_ref_list_free(&s->refs);
3517 		return err;
3518 	}
3519 
3520 	view->show = show_diff_view;
3521 	view->input = input_diff_view;
3522 	view->close = close_diff_view;
3523 	view->search_start = search_start_diff_view;
3524 	view->search_next = search_next_diff_view;
3525 
3526 	return NULL;
3527 }
3528 
3529 static const struct got_error *
3530 close_diff_view(struct tog_view *view)
3531 {
3532 	const struct got_error *err = NULL;
3533 	struct tog_diff_view_state *s = &view->state.diff;
3534 
3535 	free(s->id1);
3536 	s->id1 = NULL;
3537 	free(s->id2);
3538 	s->id2 = NULL;
3539 	if (s->f && fclose(s->f) == EOF)
3540 		err = got_error_from_errno("fclose");
3541 	free_colors(&s->colors);
3542 	free(s->line_offsets);
3543 	s->line_offsets = NULL;
3544 	s->nlines = 0;
3545 	got_ref_list_free(&s->refs);
3546 	return err;
3547 }
3548 
3549 static const struct got_error *
3550 show_diff_view(struct tog_view *view)
3551 {
3552 	const struct got_error *err;
3553 	struct tog_diff_view_state *s = &view->state.diff;
3554 	char *id_str1 = NULL, *id_str2, *header;
3555 	const char *label1, *label2;
3556 
3557 	if (s->id1) {
3558 		err = got_object_id_str(&id_str1, s->id1);
3559 		if (err)
3560 			return err;
3561 		label1 = s->label1 ? : id_str1;
3562 	} else
3563 		label1 = "/dev/null";
3564 
3565 	err = got_object_id_str(&id_str2, s->id2);
3566 	if (err)
3567 		return err;
3568 	label2 = s->label2 ? : id_str2;
3569 
3570 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3571 		err = got_error_from_errno("asprintf");
3572 		free(id_str1);
3573 		free(id_str2);
3574 		return err;
3575 	}
3576 	free(id_str1);
3577 	free(id_str2);
3578 
3579 	return draw_file(view, header);
3580 }
3581 
3582 static const struct got_error *
3583 set_selected_commit(struct tog_diff_view_state *s,
3584     struct commit_queue_entry *entry)
3585 {
3586 	const struct got_error *err;
3587 	const struct got_object_id_queue *parent_ids;
3588 	struct got_commit_object *selected_commit;
3589 	struct got_object_qid *pid;
3590 
3591 	free(s->id2);
3592 	s->id2 = got_object_id_dup(entry->id);
3593 	if (s->id2 == NULL)
3594 		return got_error_from_errno("got_object_id_dup");
3595 
3596 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3597 	if (err)
3598 		return err;
3599 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3600 	free(s->id1);
3601 	pid = SIMPLEQ_FIRST(parent_ids);
3602 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
3603 	got_object_commit_close(selected_commit);
3604 	return NULL;
3605 }
3606 
3607 static const struct got_error *
3608 input_diff_view(struct tog_view **new_view, struct tog_view **dead_view,
3609     struct tog_view **focus_view, struct tog_view *view, int ch)
3610 {
3611 	const struct got_error *err = NULL;
3612 	struct tog_diff_view_state *s = &view->state.diff;
3613 	struct tog_log_view_state *ls;
3614 	struct commit_queue_entry *entry;
3615 	int i;
3616 
3617 	switch (ch) {
3618 	case 'a':
3619 	case 'w':
3620 		if (ch == 'a')
3621 			s->force_text_diff = !s->force_text_diff;
3622 		if (ch == 'w')
3623 			s->ignore_whitespace = !s->ignore_whitespace;
3624 		wclear(view->window);
3625 		s->first_displayed_line = 1;
3626 		s->last_displayed_line = view->nlines;
3627 		diff_view_indicate_progress(view);
3628 		err = create_diff(s);
3629 		break;
3630 	case 'k':
3631 	case KEY_UP:
3632 		if (s->first_displayed_line > 1)
3633 			s->first_displayed_line--;
3634 		break;
3635 	case KEY_PPAGE:
3636 	case CTRL('b'):
3637 		if (s->first_displayed_line == 1)
3638 			break;
3639 		i = 0;
3640 		while (i++ < view->nlines - 1 &&
3641 		    s->first_displayed_line > 1)
3642 			s->first_displayed_line--;
3643 		break;
3644 	case 'j':
3645 	case KEY_DOWN:
3646 		if (!s->eof)
3647 			s->first_displayed_line++;
3648 		break;
3649 	case KEY_NPAGE:
3650 	case CTRL('f'):
3651 	case ' ':
3652 		if (s->eof)
3653 			break;
3654 		i = 0;
3655 		while (!s->eof && i++ < view->nlines - 1) {
3656 			char *line;
3657 			line = parse_next_line(s->f, NULL);
3658 			s->first_displayed_line++;
3659 			if (line == NULL)
3660 				break;
3661 		}
3662 		break;
3663 	case '[':
3664 		if (s->diff_context > 0) {
3665 			s->diff_context--;
3666 			diff_view_indicate_progress(view);
3667 			err = create_diff(s);
3668 			if (s->first_displayed_line + view->nlines - 1 >
3669 			    s->nlines) {
3670 				s->first_displayed_line = 1;
3671 				s->last_displayed_line = view->nlines;
3672 			}
3673 		}
3674 		break;
3675 	case ']':
3676 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
3677 			s->diff_context++;
3678 			diff_view_indicate_progress(view);
3679 			err = create_diff(s);
3680 		}
3681 		break;
3682 	case '<':
3683 	case ',':
3684 		if (s->log_view == NULL)
3685 			break;
3686 		ls = &s->log_view->state.log;
3687 		entry = TAILQ_PREV(ls->selected_entry,
3688 		    commit_queue_head, entry);
3689 		if (entry == NULL)
3690 			break;
3691 
3692 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3693 		    KEY_UP);
3694 		if (err)
3695 			break;
3696 
3697 		err = set_selected_commit(s, entry);
3698 		if (err)
3699 			break;
3700 
3701 		s->first_displayed_line = 1;
3702 		s->last_displayed_line = view->nlines;
3703 
3704 		diff_view_indicate_progress(view);
3705 		err = create_diff(s);
3706 		break;
3707 	case '>':
3708 	case '.':
3709 		if (s->log_view == NULL)
3710 			break;
3711 		ls = &s->log_view->state.log;
3712 
3713 		if (TAILQ_NEXT(ls->selected_entry, entry) == NULL) {
3714 			ls->thread_args.commits_needed++;
3715 			err = trigger_log_thread(s->log_view, 1);
3716 			if (err)
3717 				break;
3718 		}
3719 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3720 		    KEY_DOWN);
3721 		if (err)
3722 			break;
3723 
3724 		entry = TAILQ_NEXT(ls->selected_entry, entry);
3725 		if (entry == NULL)
3726 			break;
3727 
3728 		err = set_selected_commit(s, entry);
3729 		if (err)
3730 			break;
3731 
3732 		s->first_displayed_line = 1;
3733 		s->last_displayed_line = view->nlines;
3734 
3735 		diff_view_indicate_progress(view);
3736 		err = create_diff(s);
3737 		break;
3738 	default:
3739 		break;
3740 	}
3741 
3742 	return err;
3743 }
3744 
3745 static const struct got_error *
3746 cmd_diff(int argc, char *argv[])
3747 {
3748 	const struct got_error *error = NULL;
3749 	struct got_repository *repo = NULL;
3750 	struct got_worktree *worktree = NULL;
3751 	struct got_object_id *id1 = NULL, *id2 = NULL;
3752 	char *repo_path = NULL, *cwd = NULL;
3753 	char *id_str1 = NULL, *id_str2 = NULL;
3754 	char *label1 = NULL, *label2 = NULL;
3755 	int diff_context = 3, ignore_whitespace = 0;
3756 	int ch, force_text_diff = 0;
3757 	const char *errstr;
3758 	struct tog_view *view;
3759 
3760 #ifndef PROFILE
3761 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
3762 	    NULL) == -1)
3763 		err(1, "pledge");
3764 #endif
3765 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
3766 		switch (ch) {
3767 		case 'a':
3768 			force_text_diff = 1;
3769 			break;
3770 		case 'C':
3771 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
3772 			    &errstr);
3773 			if (errstr != NULL)
3774 				err(1, "-C option %s", errstr);
3775 			break;
3776 		case 'r':
3777 			repo_path = realpath(optarg, NULL);
3778 			if (repo_path == NULL)
3779 				return got_error_from_errno2("realpath",
3780 				    optarg);
3781 			got_path_strip_trailing_slashes(repo_path);
3782 			break;
3783 		case 'w':
3784 			ignore_whitespace = 1;
3785 			break;
3786 		default:
3787 			usage_diff();
3788 			/* NOTREACHED */
3789 		}
3790 	}
3791 
3792 	argc -= optind;
3793 	argv += optind;
3794 
3795 	if (argc == 0) {
3796 		usage_diff(); /* TODO show local worktree changes */
3797 	} else if (argc == 2) {
3798 		id_str1 = argv[0];
3799 		id_str2 = argv[1];
3800 	} else
3801 		usage_diff();
3802 
3803 	cwd = getcwd(NULL, 0);
3804 	if (cwd == NULL)
3805 		return got_error_from_errno("getcwd");
3806 
3807 	error = got_worktree_open(&worktree, cwd);
3808 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
3809 		goto done;
3810 
3811 	if (repo_path == NULL) {
3812 		if (worktree)
3813 			repo_path =
3814 			    strdup(got_worktree_get_repo_path(worktree));
3815 		else
3816 			repo_path = strdup(cwd);
3817 	}
3818 	if (repo_path == NULL) {
3819 		error = got_error_from_errno("strdup");
3820 		goto done;
3821 	}
3822 
3823 	error = got_repo_open(&repo, repo_path, NULL);
3824 	if (error)
3825 		goto done;
3826 
3827 	init_curses();
3828 
3829 	error = apply_unveil(got_repo_get_path(repo), NULL);
3830 	if (error)
3831 		goto done;
3832 
3833 	error = got_repo_match_object_id(&id1, &label1, id_str1,
3834 	    GOT_OBJ_TYPE_ANY, 1, repo);
3835 	if (error)
3836 		goto done;
3837 
3838 	error = got_repo_match_object_id(&id2, &label2, id_str2,
3839 	    GOT_OBJ_TYPE_ANY, 1, repo);
3840 	if (error)
3841 		goto done;
3842 
3843 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
3844 	if (view == NULL) {
3845 		error = got_error_from_errno("view_open");
3846 		goto done;
3847 	}
3848 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
3849 	    ignore_whitespace, force_text_diff, NULL,  repo);
3850 	if (error)
3851 		goto done;
3852 	error = view_loop(view);
3853 done:
3854 	free(label1);
3855 	free(label2);
3856 	free(repo_path);
3857 	free(cwd);
3858 	if (repo)
3859 		got_repo_close(repo);
3860 	if (worktree)
3861 		got_worktree_close(worktree);
3862 	return error;
3863 }
3864 
3865 __dead static void
3866 usage_blame(void)
3867 {
3868 	endwin();
3869 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
3870 	    getprogname());
3871 	exit(1);
3872 }
3873 
3874 struct tog_blame_line {
3875 	int annotated;
3876 	struct got_object_id *id;
3877 };
3878 
3879 static const struct got_error *
3880 draw_blame(struct tog_view *view)
3881 {
3882 	struct tog_blame_view_state *s = &view->state.blame;
3883 	struct tog_blame *blame = &s->blame;
3884 	regmatch_t *regmatch = &view->regmatch;
3885 	const struct got_error *err;
3886 	int lineno = 0, nprinted = 0;
3887 	char *line;
3888 	size_t len;
3889 	wchar_t *wline;
3890 	int width;
3891 	struct tog_blame_line *blame_line;
3892 	struct got_object_id *prev_id = NULL;
3893 	char *id_str;
3894 	struct tog_color *tc;
3895 
3896 	err = got_object_id_str(&id_str, s->blamed_commit->id);
3897 	if (err)
3898 		return err;
3899 
3900 	rewind(blame->f);
3901 	werase(view->window);
3902 
3903 	if (asprintf(&line, "commit %s", id_str) == -1) {
3904 		err = got_error_from_errno("asprintf");
3905 		free(id_str);
3906 		return err;
3907 	}
3908 
3909 	err = format_line(&wline, &width, line, view->ncols, 0);
3910 	free(line);
3911 	line = NULL;
3912 	if (err)
3913 		return err;
3914 	if (view_needs_focus_indication(view))
3915 		wstandout(view->window);
3916 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
3917 	if (tc)
3918 		wattr_on(view->window,
3919 		    COLOR_PAIR(tc->colorpair), NULL);
3920 	waddwstr(view->window, wline);
3921 	if (tc)
3922 		wattr_off(view->window,
3923 		    COLOR_PAIR(tc->colorpair), NULL);
3924 	if (view_needs_focus_indication(view))
3925 		wstandend(view->window);
3926 	free(wline);
3927 	wline = NULL;
3928 	if (width < view->ncols - 1)
3929 		waddch(view->window, '\n');
3930 
3931 	if (asprintf(&line, "[%d/%d] %s%s",
3932 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
3933 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
3934 		free(id_str);
3935 		return got_error_from_errno("asprintf");
3936 	}
3937 	free(id_str);
3938 	err = format_line(&wline, &width, line, view->ncols, 0);
3939 	free(line);
3940 	line = NULL;
3941 	if (err)
3942 		return err;
3943 	waddwstr(view->window, wline);
3944 	free(wline);
3945 	wline = NULL;
3946 	if (width < view->ncols - 1)
3947 		waddch(view->window, '\n');
3948 
3949 	s->eof = 0;
3950 	while (nprinted < view->nlines - 2) {
3951 		line = parse_next_line(blame->f, &len);
3952 		if (line == NULL) {
3953 			s->eof = 1;
3954 			break;
3955 		}
3956 		if (++lineno < s->first_displayed_line) {
3957 			free(line);
3958 			continue;
3959 		}
3960 
3961 		if (view->focussed && nprinted == s->selected_line - 1)
3962 			wstandout(view->window);
3963 
3964 		if (blame->nlines > 0) {
3965 			blame_line = &blame->lines[lineno - 1];
3966 			if (blame_line->annotated && prev_id &&
3967 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
3968 			    !(view->focussed &&
3969 			    nprinted == s->selected_line - 1)) {
3970 				waddstr(view->window, "        ");
3971 			} else if (blame_line->annotated) {
3972 				char *id_str;
3973 				err = got_object_id_str(&id_str, blame_line->id);
3974 				if (err) {
3975 					free(line);
3976 					return err;
3977 				}
3978 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
3979 				if (tc)
3980 					wattr_on(view->window,
3981 					    COLOR_PAIR(tc->colorpair), NULL);
3982 				wprintw(view->window, "%.8s", id_str);
3983 				if (tc)
3984 					wattr_off(view->window,
3985 					    COLOR_PAIR(tc->colorpair), NULL);
3986 				free(id_str);
3987 				prev_id = blame_line->id;
3988 			} else {
3989 				waddstr(view->window, "........");
3990 				prev_id = NULL;
3991 			}
3992 		} else {
3993 			waddstr(view->window, "........");
3994 			prev_id = NULL;
3995 		}
3996 
3997 		if (view->focussed && nprinted == s->selected_line - 1)
3998 			wstandend(view->window);
3999 		waddstr(view->window, " ");
4000 
4001 		if (view->ncols <= 9) {
4002 			width = 9;
4003 			wline = wcsdup(L"");
4004 			if (wline == NULL) {
4005 				err = got_error_from_errno("wcsdup");
4006 				free(line);
4007 				return err;
4008 			}
4009 		} else if (s->first_displayed_line + nprinted ==
4010 		    s->matched_line &&
4011 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4012 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4013 			    view->window, regmatch);
4014 			if (err) {
4015 				free(line);
4016 				return err;
4017 			}
4018 			width += 9;
4019 		} else {
4020 			err = format_line(&wline, &width, line,
4021 			    view->ncols - 9, 9);
4022 			waddwstr(view->window, wline);
4023 			free(wline);
4024 			wline = NULL;
4025 			width += 9;
4026 		}
4027 
4028 		if (width <= view->ncols - 1)
4029 			waddch(view->window, '\n');
4030 		if (++nprinted == 1)
4031 			s->first_displayed_line = lineno;
4032 		free(line);
4033 	}
4034 	s->last_displayed_line = lineno;
4035 
4036 	view_vborder(view);
4037 
4038 	return NULL;
4039 }
4040 
4041 static const struct got_error *
4042 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
4043 {
4044 	const struct got_error *err = NULL;
4045 	struct tog_blame_cb_args *a = arg;
4046 	struct tog_blame_line *line;
4047 	int errcode;
4048 
4049 	if (nlines != a->nlines ||
4050 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4051 		return got_error(GOT_ERR_RANGE);
4052 
4053 	errcode = pthread_mutex_lock(&tog_mutex);
4054 	if (errcode)
4055 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4056 
4057 	if (*a->quit) {	/* user has quit the blame view */
4058 		err = got_error(GOT_ERR_ITER_COMPLETED);
4059 		goto done;
4060 	}
4061 
4062 	if (lineno == -1)
4063 		goto done; /* no change in this commit */
4064 
4065 	line = &a->lines[lineno - 1];
4066 	if (line->annotated)
4067 		goto done;
4068 
4069 	line->id = got_object_id_dup(id);
4070 	if (line->id == NULL) {
4071 		err = got_error_from_errno("got_object_id_dup");
4072 		goto done;
4073 	}
4074 	line->annotated = 1;
4075 done:
4076 	errcode = pthread_mutex_unlock(&tog_mutex);
4077 	if (errcode)
4078 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4079 	return err;
4080 }
4081 
4082 static void *
4083 blame_thread(void *arg)
4084 {
4085 	const struct got_error *err;
4086 	struct tog_blame_thread_args *ta = arg;
4087 	struct tog_blame_cb_args *a = ta->cb_args;
4088 	int errcode;
4089 
4090 	err = block_signals_used_by_main_thread();
4091 	if (err)
4092 		return (void *)err;
4093 
4094 	err = got_blame(ta->path, a->commit_id, ta->repo,
4095 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4096 	if (err && err->code == GOT_ERR_CANCELLED)
4097 		err = NULL;
4098 
4099 	errcode = pthread_mutex_lock(&tog_mutex);
4100 	if (errcode)
4101 		return (void *)got_error_set_errno(errcode,
4102 		    "pthread_mutex_lock");
4103 
4104 	got_repo_close(ta->repo);
4105 	ta->repo = NULL;
4106 	*ta->complete = 1;
4107 
4108 	errcode = pthread_mutex_unlock(&tog_mutex);
4109 	if (errcode && err == NULL)
4110 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4111 
4112 	return (void *)err;
4113 }
4114 
4115 static struct got_object_id *
4116 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4117     int first_displayed_line, int selected_line)
4118 {
4119 	struct tog_blame_line *line;
4120 
4121 	if (nlines <= 0)
4122 		return NULL;
4123 
4124 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4125 	if (!line->annotated)
4126 		return NULL;
4127 
4128 	return line->id;
4129 }
4130 
4131 static const struct got_error *
4132 stop_blame(struct tog_blame *blame)
4133 {
4134 	const struct got_error *err = NULL;
4135 	int i;
4136 
4137 	if (blame->thread) {
4138 		int errcode;
4139 		errcode = pthread_mutex_unlock(&tog_mutex);
4140 		if (errcode)
4141 			return got_error_set_errno(errcode,
4142 			    "pthread_mutex_unlock");
4143 		errcode = pthread_join(blame->thread, (void **)&err);
4144 		if (errcode)
4145 			return got_error_set_errno(errcode, "pthread_join");
4146 		errcode = pthread_mutex_lock(&tog_mutex);
4147 		if (errcode)
4148 			return got_error_set_errno(errcode,
4149 			    "pthread_mutex_lock");
4150 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4151 			err = NULL;
4152 		blame->thread = NULL;
4153 	}
4154 	if (blame->thread_args.repo) {
4155 		got_repo_close(blame->thread_args.repo);
4156 		blame->thread_args.repo = NULL;
4157 	}
4158 	if (blame->f) {
4159 		if (fclose(blame->f) != 0 && err == NULL)
4160 			err = got_error_from_errno("fclose");
4161 		blame->f = NULL;
4162 	}
4163 	if (blame->lines) {
4164 		for (i = 0; i < blame->nlines; i++)
4165 			free(blame->lines[i].id);
4166 		free(blame->lines);
4167 		blame->lines = NULL;
4168 	}
4169 	free(blame->cb_args.commit_id);
4170 	blame->cb_args.commit_id = NULL;
4171 
4172 	return err;
4173 }
4174 
4175 static const struct got_error *
4176 cancel_blame_view(void *arg)
4177 {
4178 	const struct got_error *err = NULL;
4179 	int *done = arg;
4180 	int errcode;
4181 
4182 	errcode = pthread_mutex_lock(&tog_mutex);
4183 	if (errcode)
4184 		return got_error_set_errno(errcode,
4185 		    "pthread_mutex_unlock");
4186 
4187 	if (*done)
4188 		err = got_error(GOT_ERR_CANCELLED);
4189 
4190 	errcode = pthread_mutex_unlock(&tog_mutex);
4191 	if (errcode)
4192 		return got_error_set_errno(errcode,
4193 		    "pthread_mutex_lock");
4194 
4195 	return err;
4196 }
4197 
4198 static const struct got_error *
4199 run_blame(struct tog_view *view)
4200 {
4201 	struct tog_blame_view_state *s = &view->state.blame;
4202 	struct tog_blame *blame = &s->blame;
4203 	const struct got_error *err = NULL;
4204 	struct got_blob_object *blob = NULL;
4205 	struct got_repository *thread_repo = NULL;
4206 	struct got_object_id *obj_id = NULL;
4207 	int obj_type;
4208 
4209 	err = got_object_id_by_path(&obj_id, s->repo, s->blamed_commit->id,
4210 	    s->path);
4211 	if (err)
4212 		return err;
4213 
4214 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4215 	if (err)
4216 		goto done;
4217 
4218 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4219 		err = got_error(GOT_ERR_OBJ_TYPE);
4220 		goto done;
4221 	}
4222 
4223 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4224 	if (err)
4225 		goto done;
4226 	blame->f = got_opentemp();
4227 	if (blame->f == NULL) {
4228 		err = got_error_from_errno("got_opentemp");
4229 		goto done;
4230 	}
4231 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4232 	    &blame->line_offsets, blame->f, blob);
4233 	if (err || blame->nlines == 0)
4234 		goto done;
4235 
4236 	/* Don't include \n at EOF in the blame line count. */
4237 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4238 		blame->nlines--;
4239 
4240 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4241 	if (blame->lines == NULL) {
4242 		err = got_error_from_errno("calloc");
4243 		goto done;
4244 	}
4245 
4246 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL);
4247 	if (err)
4248 		goto done;
4249 
4250 	blame->cb_args.view = view;
4251 	blame->cb_args.lines = blame->lines;
4252 	blame->cb_args.nlines = blame->nlines;
4253 	blame->cb_args.commit_id = got_object_id_dup(s->blamed_commit->id);
4254 	if (blame->cb_args.commit_id == NULL) {
4255 		err = got_error_from_errno("got_object_id_dup");
4256 		goto done;
4257 	}
4258 	blame->cb_args.quit = &s->done;
4259 
4260 	blame->thread_args.path = s->path;
4261 	blame->thread_args.repo = thread_repo;
4262 	blame->thread_args.cb_args = &blame->cb_args;
4263 	blame->thread_args.complete = &s->blame_complete;
4264 	blame->thread_args.cancel_cb = cancel_blame_view;
4265 	blame->thread_args.cancel_arg = &s->done;
4266 	s->blame_complete = 0;
4267 
4268 done:
4269 	if (blob)
4270 		got_object_blob_close(blob);
4271 	free(obj_id);
4272 	if (err)
4273 		stop_blame(blame);
4274 	return err;
4275 }
4276 
4277 static const struct got_error *
4278 open_blame_view(struct tog_view *view, char *path,
4279     struct got_object_id *commit_id, struct got_repository *repo)
4280 {
4281 	const struct got_error *err = NULL;
4282 	struct tog_blame_view_state *s = &view->state.blame;
4283 
4284 	SIMPLEQ_INIT(&s->blamed_commits);
4285 
4286 	s->path = strdup(path);
4287 	if (s->path == NULL)
4288 		return got_error_from_errno("strdup");
4289 
4290 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4291 	if (err) {
4292 		free(s->path);
4293 		return err;
4294 	}
4295 
4296 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4297 	s->first_displayed_line = 1;
4298 	s->last_displayed_line = view->nlines;
4299 	s->selected_line = 1;
4300 	s->blame_complete = 0;
4301 	s->repo = repo;
4302 	s->commit_id = commit_id;
4303 	memset(&s->blame, 0, sizeof(s->blame));
4304 
4305 	SIMPLEQ_INIT(&s->colors);
4306 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4307 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4308 		    get_color_value("TOG_COLOR_COMMIT"));
4309 		if (err)
4310 			return err;
4311 	}
4312 
4313 	view->show = show_blame_view;
4314 	view->input = input_blame_view;
4315 	view->close = close_blame_view;
4316 	view->search_start = search_start_blame_view;
4317 	view->search_next = search_next_blame_view;
4318 
4319 	return run_blame(view);
4320 }
4321 
4322 static const struct got_error *
4323 close_blame_view(struct tog_view *view)
4324 {
4325 	const struct got_error *err = NULL;
4326 	struct tog_blame_view_state *s = &view->state.blame;
4327 
4328 	if (s->blame.thread)
4329 		err = stop_blame(&s->blame);
4330 
4331 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
4332 		struct got_object_qid *blamed_commit;
4333 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
4334 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4335 		got_object_qid_free(blamed_commit);
4336 	}
4337 
4338 	free(s->path);
4339 	free_colors(&s->colors);
4340 
4341 	return err;
4342 }
4343 
4344 static const struct got_error *
4345 search_start_blame_view(struct tog_view *view)
4346 {
4347 	struct tog_blame_view_state *s = &view->state.blame;
4348 
4349 	s->matched_line = 0;
4350 	return NULL;
4351 }
4352 
4353 static const struct got_error *
4354 search_next_blame_view(struct tog_view *view)
4355 {
4356 	struct tog_blame_view_state *s = &view->state.blame;
4357 	int lineno;
4358 
4359 	if (!view->searching) {
4360 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4361 		return NULL;
4362 	}
4363 
4364 	if (s->matched_line) {
4365 		if (view->searching == TOG_SEARCH_FORWARD)
4366 			lineno = s->matched_line + 1;
4367 		else
4368 			lineno = s->matched_line - 1;
4369 	} else {
4370 		if (view->searching == TOG_SEARCH_FORWARD)
4371 			lineno = 1;
4372 		else
4373 			lineno = s->blame.nlines;
4374 	}
4375 
4376 	while (1) {
4377 		char *line = NULL;
4378 		off_t offset;
4379 		size_t len;
4380 
4381 		if (lineno <= 0 || lineno > s->blame.nlines) {
4382 			if (s->matched_line == 0) {
4383 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4384 				free(line);
4385 				break;
4386 			}
4387 
4388 			if (view->searching == TOG_SEARCH_FORWARD)
4389 				lineno = 1;
4390 			else
4391 				lineno = s->blame.nlines;
4392 		}
4393 
4394 		offset = s->blame.line_offsets[lineno - 1];
4395 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4396 			free(line);
4397 			return got_error_from_errno("fseeko");
4398 		}
4399 		free(line);
4400 		line = parse_next_line(s->blame.f, &len);
4401 		if (line &&
4402 		    match_line(line, &view->regex, 1, &view->regmatch)) {
4403 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
4404 			s->matched_line = lineno;
4405 			free(line);
4406 			break;
4407 		}
4408 		free(line);
4409 		if (view->searching == TOG_SEARCH_FORWARD)
4410 			lineno++;
4411 		else
4412 			lineno--;
4413 	}
4414 
4415 	if (s->matched_line) {
4416 		s->first_displayed_line = s->matched_line;
4417 		s->selected_line = 1;
4418 	}
4419 
4420 	return NULL;
4421 }
4422 
4423 static const struct got_error *
4424 show_blame_view(struct tog_view *view)
4425 {
4426 	const struct got_error *err = NULL;
4427 	struct tog_blame_view_state *s = &view->state.blame;
4428 	int errcode;
4429 
4430 	if (s->blame.thread == NULL) {
4431 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4432 		    &s->blame.thread_args);
4433 		if (errcode)
4434 			return got_error_set_errno(errcode, "pthread_create");
4435 
4436 		halfdelay(1); /* fast refresh while annotating  */
4437 	}
4438 
4439 	if (s->blame_complete)
4440 		halfdelay(10); /* disable fast refresh */
4441 
4442 	err = draw_blame(view);
4443 
4444 	view_vborder(view);
4445 	return err;
4446 }
4447 
4448 static const struct got_error *
4449 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
4450     struct tog_view **focus_view, struct tog_view *view, int ch)
4451 {
4452 	const struct got_error *err = NULL, *thread_err = NULL;
4453 	struct tog_view *diff_view;
4454 	struct tog_blame_view_state *s = &view->state.blame;
4455 	int begin_x = 0;
4456 
4457 	switch (ch) {
4458 	case 'q':
4459 		s->done = 1;
4460 		break;
4461 	case 'k':
4462 	case KEY_UP:
4463 		if (s->selected_line > 1)
4464 			s->selected_line--;
4465 		else if (s->selected_line == 1 &&
4466 		    s->first_displayed_line > 1)
4467 			s->first_displayed_line--;
4468 		break;
4469 	case KEY_PPAGE:
4470 	case CTRL('b'):
4471 		if (s->first_displayed_line == 1) {
4472 			s->selected_line = 1;
4473 			break;
4474 		}
4475 		if (s->first_displayed_line > view->nlines - 2)
4476 			s->first_displayed_line -=
4477 			    (view->nlines - 2);
4478 		else
4479 			s->first_displayed_line = 1;
4480 		break;
4481 	case 'j':
4482 	case KEY_DOWN:
4483 		if (s->selected_line < view->nlines - 2 &&
4484 		    s->first_displayed_line +
4485 		    s->selected_line <= s->blame.nlines)
4486 			s->selected_line++;
4487 		else if (s->last_displayed_line <
4488 		    s->blame.nlines)
4489 			s->first_displayed_line++;
4490 		break;
4491 	case 'b':
4492 	case 'p': {
4493 		struct got_object_id *id = NULL;
4494 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4495 		    s->first_displayed_line, s->selected_line);
4496 		if (id == NULL)
4497 			break;
4498 		if (ch == 'p') {
4499 			struct got_commit_object *commit;
4500 			struct got_object_qid *pid;
4501 			struct got_object_id *blob_id = NULL;
4502 			int obj_type;
4503 			err = got_object_open_as_commit(&commit,
4504 			    s->repo, id);
4505 			if (err)
4506 				break;
4507 			pid = SIMPLEQ_FIRST(
4508 			    got_object_commit_get_parent_ids(commit));
4509 			if (pid == NULL) {
4510 				got_object_commit_close(commit);
4511 				break;
4512 			}
4513 			/* Check if path history ends here. */
4514 			err = got_object_id_by_path(&blob_id, s->repo,
4515 			    pid->id, s->path);
4516 			if (err) {
4517 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
4518 					err = NULL;
4519 				got_object_commit_close(commit);
4520 				break;
4521 			}
4522 			err = got_object_get_type(&obj_type, s->repo,
4523 			    blob_id);
4524 			free(blob_id);
4525 			/* Can't blame non-blob type objects. */
4526 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
4527 				got_object_commit_close(commit);
4528 				break;
4529 			}
4530 			err = got_object_qid_alloc(&s->blamed_commit,
4531 			    pid->id);
4532 			got_object_commit_close(commit);
4533 		} else {
4534 			if (got_object_id_cmp(id,
4535 			    s->blamed_commit->id) == 0)
4536 				break;
4537 			err = got_object_qid_alloc(&s->blamed_commit,
4538 			    id);
4539 		}
4540 		if (err)
4541 			break;
4542 		s->done = 1;
4543 		thread_err = stop_blame(&s->blame);
4544 		s->done = 0;
4545 		if (thread_err)
4546 			break;
4547 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
4548 		    s->blamed_commit, entry);
4549 		err = run_blame(view);
4550 		if (err)
4551 			break;
4552 		break;
4553 	}
4554 	case 'B': {
4555 		struct got_object_qid *first;
4556 		first = SIMPLEQ_FIRST(&s->blamed_commits);
4557 		if (!got_object_id_cmp(first->id, s->commit_id))
4558 			break;
4559 		s->done = 1;
4560 		thread_err = stop_blame(&s->blame);
4561 		s->done = 0;
4562 		if (thread_err)
4563 			break;
4564 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4565 		got_object_qid_free(s->blamed_commit);
4566 		s->blamed_commit =
4567 		    SIMPLEQ_FIRST(&s->blamed_commits);
4568 		err = run_blame(view);
4569 		if (err)
4570 			break;
4571 		break;
4572 	}
4573 	case KEY_ENTER:
4574 	case '\r': {
4575 		struct got_object_id *id = NULL;
4576 		struct got_object_qid *pid;
4577 		struct got_commit_object *commit = NULL;
4578 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4579 		    s->first_displayed_line, s->selected_line);
4580 		if (id == NULL)
4581 			break;
4582 		err = got_object_open_as_commit(&commit, s->repo, id);
4583 		if (err)
4584 			break;
4585 		pid = SIMPLEQ_FIRST(
4586 		    got_object_commit_get_parent_ids(commit));
4587 		if (view_is_parent_view(view))
4588 		    begin_x = view_split_begin_x(view->begin_x);
4589 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
4590 		if (diff_view == NULL) {
4591 			got_object_commit_close(commit);
4592 			err = got_error_from_errno("view_open");
4593 			break;
4594 		}
4595 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
4596 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
4597 		got_object_commit_close(commit);
4598 		if (err) {
4599 			view_close(diff_view);
4600 			break;
4601 		}
4602 		if (view_is_parent_view(view)) {
4603 			err = view_close_child(view);
4604 			if (err)
4605 				break;
4606 			err = view_set_child(view, diff_view);
4607 			if (err) {
4608 				view_close(diff_view);
4609 				break;
4610 			}
4611 			*focus_view = diff_view;
4612 			view->child_focussed = 1;
4613 		} else
4614 			*new_view = diff_view;
4615 		if (err)
4616 			break;
4617 		break;
4618 	}
4619 	case KEY_NPAGE:
4620 	case CTRL('f'):
4621 	case ' ':
4622 		if (s->last_displayed_line >= s->blame.nlines &&
4623 		    s->selected_line >= MIN(s->blame.nlines,
4624 		    view->nlines - 2)) {
4625 			break;
4626 		}
4627 		if (s->last_displayed_line >= s->blame.nlines &&
4628 		    s->selected_line < view->nlines - 2) {
4629 			s->selected_line = MIN(s->blame.nlines,
4630 			    view->nlines - 2);
4631 			break;
4632 		}
4633 		if (s->last_displayed_line + view->nlines - 2
4634 		    <= s->blame.nlines)
4635 			s->first_displayed_line +=
4636 			    view->nlines - 2;
4637 		else
4638 			s->first_displayed_line =
4639 			    s->blame.nlines -
4640 			    (view->nlines - 3);
4641 		break;
4642 	case KEY_RESIZE:
4643 		if (s->selected_line > view->nlines - 2) {
4644 			s->selected_line = MIN(s->blame.nlines,
4645 			    view->nlines - 2);
4646 		}
4647 		break;
4648 	default:
4649 		break;
4650 	}
4651 	return thread_err ? thread_err : err;
4652 }
4653 
4654 static const struct got_error *
4655 cmd_blame(int argc, char *argv[])
4656 {
4657 	const struct got_error *error;
4658 	struct got_repository *repo = NULL;
4659 	struct got_worktree *worktree = NULL;
4660 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4661 	char *link_target = NULL;
4662 	struct got_object_id *commit_id = NULL;
4663 	char *commit_id_str = NULL;
4664 	int ch;
4665 	struct tog_view *view;
4666 
4667 #ifndef PROFILE
4668 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4669 	    NULL) == -1)
4670 		err(1, "pledge");
4671 #endif
4672 
4673 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
4674 		switch (ch) {
4675 		case 'c':
4676 			commit_id_str = optarg;
4677 			break;
4678 		case 'r':
4679 			repo_path = realpath(optarg, NULL);
4680 			if (repo_path == NULL)
4681 				return got_error_from_errno2("realpath",
4682 				    optarg);
4683 			break;
4684 		default:
4685 			usage_blame();
4686 			/* NOTREACHED */
4687 		}
4688 	}
4689 
4690 	argc -= optind;
4691 	argv += optind;
4692 
4693 	if (argc != 1)
4694 		usage_blame();
4695 
4696 	cwd = getcwd(NULL, 0);
4697 	if (cwd == NULL)
4698 		return got_error_from_errno("getcwd");
4699 
4700 	error = got_worktree_open(&worktree, cwd);
4701 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
4702 		goto done;
4703 
4704 	if (repo_path == NULL) {
4705 		if (worktree)
4706 			repo_path =
4707 			    strdup(got_worktree_get_repo_path(worktree));
4708 		else
4709 			repo_path = strdup(cwd);
4710 	}
4711 	if (repo_path == NULL) {
4712 		error = got_error_from_errno("strdup");
4713 		goto done;
4714 	}
4715 
4716 	error = got_repo_open(&repo, repo_path, NULL);
4717 	if (error != NULL)
4718 		goto done;
4719 
4720 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
4721 	    worktree);
4722 	if (error)
4723 		goto done;
4724 
4725 	init_curses();
4726 
4727 	error = apply_unveil(got_repo_get_path(repo), NULL);
4728 	if (error)
4729 		goto done;
4730 
4731 	if (commit_id_str == NULL) {
4732 		struct got_reference *head_ref;
4733 		error = got_ref_open(&head_ref, repo, worktree ?
4734 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
4735 		if (error != NULL)
4736 			goto done;
4737 		error = got_ref_resolve(&commit_id, repo, head_ref);
4738 		got_ref_close(head_ref);
4739 	} else {
4740 		error = got_repo_match_object_id(&commit_id, NULL,
4741 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, 1, repo);
4742 	}
4743 	if (error != NULL)
4744 		goto done;
4745 
4746 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
4747 	if (view == NULL) {
4748 		error = got_error_from_errno("view_open");
4749 		goto done;
4750 	}
4751 
4752 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
4753 	    commit_id, repo);
4754 	if (error)
4755 		goto done;
4756 
4757 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
4758 	    commit_id, repo);
4759 	if (error)
4760 		goto done;
4761 	if (worktree) {
4762 		/* Release work tree lock. */
4763 		got_worktree_close(worktree);
4764 		worktree = NULL;
4765 	}
4766 	error = view_loop(view);
4767 done:
4768 	free(repo_path);
4769 	free(in_repo_path);
4770 	free(link_target);
4771 	free(cwd);
4772 	free(commit_id);
4773 	if (worktree)
4774 		got_worktree_close(worktree);
4775 	if (repo)
4776 		got_repo_close(repo);
4777 	return error;
4778 }
4779 
4780 static const struct got_error *
4781 draw_tree_entries(struct tog_view *view, const char *parent_path)
4782 {
4783 	struct tog_tree_view_state *s = &view->state.tree;
4784 	const struct got_error *err = NULL;
4785 	struct got_tree_entry *te;
4786 	wchar_t *wline;
4787 	struct tog_color *tc;
4788 	int width, n, i, nentries;
4789 	int limit = view->nlines;
4790 
4791 	s->ndisplayed = 0;
4792 
4793 	werase(view->window);
4794 
4795 	if (limit == 0)
4796 		return NULL;
4797 
4798 	err = format_line(&wline, &width, s->tree_label, view->ncols, 0);
4799 	if (err)
4800 		return err;
4801 	if (view_needs_focus_indication(view))
4802 		wstandout(view->window);
4803 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
4804 	if (tc)
4805 		wattr_on(view->window,
4806 		    COLOR_PAIR(tc->colorpair), NULL);
4807 	waddwstr(view->window, wline);
4808 	if (tc)
4809 		wattr_off(view->window,
4810 		    COLOR_PAIR(tc->colorpair), NULL);
4811 	if (view_needs_focus_indication(view))
4812 		wstandend(view->window);
4813 	free(wline);
4814 	wline = NULL;
4815 	if (width < view->ncols - 1)
4816 		waddch(view->window, '\n');
4817 	if (--limit <= 0)
4818 		return NULL;
4819 	err = format_line(&wline, &width, parent_path, view->ncols, 0);
4820 	if (err)
4821 		return err;
4822 	waddwstr(view->window, wline);
4823 	free(wline);
4824 	wline = NULL;
4825 	if (width < view->ncols - 1)
4826 		waddch(view->window, '\n');
4827 	if (--limit <= 0)
4828 		return NULL;
4829 	waddch(view->window, '\n');
4830 	if (--limit <= 0)
4831 		return NULL;
4832 
4833 	if (s->first_displayed_entry == NULL) {
4834 		te = got_object_tree_get_first_entry(s->tree);
4835 		if (s->selected == 0) {
4836 			if (view->focussed)
4837 				wstandout(view->window);
4838 			s->selected_entry = NULL;
4839 		}
4840 		waddstr(view->window, "  ..\n");	/* parent directory */
4841 		if (s->selected == 0 && view->focussed)
4842 			wstandend(view->window);
4843 		s->ndisplayed++;
4844 		if (--limit <= 0)
4845 			return NULL;
4846 		n = 1;
4847 	} else {
4848 		n = 0;
4849 		te = s->first_displayed_entry;
4850 	}
4851 
4852 	nentries = got_object_tree_get_nentries(s->tree);
4853 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
4854 		char *line = NULL, *id_str = NULL, *link_target = NULL;
4855 		const char *modestr = "";
4856 		mode_t mode;
4857 
4858 		te = got_object_tree_get_entry(s->tree, i);
4859 		mode = got_tree_entry_get_mode(te);
4860 
4861 		if (s->show_ids) {
4862 			err = got_object_id_str(&id_str,
4863 			    got_tree_entry_get_id(te));
4864 			if (err)
4865 				return got_error_from_errno(
4866 				    "got_object_id_str");
4867 		}
4868 		if (got_object_tree_entry_is_submodule(te))
4869 			modestr = "$";
4870 		else if (S_ISLNK(mode)) {
4871 			int i;
4872 
4873 			err = got_tree_entry_get_symlink_target(&link_target,
4874 			    te, s->repo);
4875 			if (err) {
4876 				free(id_str);
4877 				return err;
4878 			}
4879 			for (i = 0; i < strlen(link_target); i++) {
4880 				if (!isprint((unsigned char)link_target[i]))
4881 					link_target[i] = '?';
4882 			}
4883 			modestr = "@";
4884 		}
4885 		else if (S_ISDIR(mode))
4886 			modestr = "/";
4887 		else if (mode & S_IXUSR)
4888 			modestr = "*";
4889 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
4890 		    got_tree_entry_get_name(te), modestr,
4891 		    link_target ? " -> ": "",
4892 		    link_target ? link_target : "") == -1) {
4893 			free(id_str);
4894 			free(link_target);
4895 			return got_error_from_errno("asprintf");
4896 		}
4897 		free(id_str);
4898 		free(link_target);
4899 		err = format_line(&wline, &width, line, view->ncols, 0);
4900 		if (err) {
4901 			free(line);
4902 			break;
4903 		}
4904 		if (n == s->selected) {
4905 			if (view->focussed)
4906 				wstandout(view->window);
4907 			s->selected_entry = te;
4908 		}
4909 		tc = match_color(&s->colors, line);
4910 		if (tc)
4911 			wattr_on(view->window,
4912 			    COLOR_PAIR(tc->colorpair), NULL);
4913 		waddwstr(view->window, wline);
4914 		if (tc)
4915 			wattr_off(view->window,
4916 			    COLOR_PAIR(tc->colorpair), NULL);
4917 		if (width < view->ncols - 1)
4918 			waddch(view->window, '\n');
4919 		if (n == s->selected && view->focussed)
4920 			wstandend(view->window);
4921 		free(line);
4922 		free(wline);
4923 		wline = NULL;
4924 		n++;
4925 		s->ndisplayed++;
4926 		s->last_displayed_entry = te;
4927 		if (--limit <= 0)
4928 			break;
4929 	}
4930 
4931 	return err;
4932 }
4933 
4934 static void
4935 tree_scroll_up(struct tog_view *view, int maxscroll)
4936 {
4937 	struct tog_tree_view_state *s = &view->state.tree;
4938 	struct got_tree_entry *te;
4939 	int isroot = s->tree == s->root;
4940 	int i = 0;
4941 
4942 	if (s->first_displayed_entry == NULL)
4943 		return;
4944 
4945 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
4946 	while (i++ < maxscroll) {
4947 		if (te == NULL) {
4948 			if (!isroot)
4949 				s->first_displayed_entry = NULL;
4950 			break;
4951 		}
4952 		s->first_displayed_entry = te;
4953 		te = got_tree_entry_get_prev(s->tree, te);
4954 	}
4955 }
4956 
4957 static void
4958 tree_scroll_down(struct tog_view *view, int maxscroll)
4959 {
4960 	struct tog_tree_view_state *s = &view->state.tree;
4961 	struct got_tree_entry *next, *last;
4962 	int n = 0;
4963 
4964 	if (s->first_displayed_entry)
4965 		next = got_tree_entry_get_next(s->tree,
4966 		    s->first_displayed_entry);
4967 	else
4968 		next = got_object_tree_get_first_entry(s->tree);
4969 
4970 	last = s->last_displayed_entry;
4971 	while (next && last && n++ < maxscroll) {
4972 		last = got_tree_entry_get_next(s->tree, last);
4973 		if (last) {
4974 			s->first_displayed_entry = next;
4975 			next = got_tree_entry_get_next(s->tree, next);
4976 		}
4977 	}
4978 }
4979 
4980 static const struct got_error *
4981 tree_entry_path(char **path, struct tog_parent_trees *parents,
4982     struct got_tree_entry *te)
4983 {
4984 	const struct got_error *err = NULL;
4985 	struct tog_parent_tree *pt;
4986 	size_t len = 2; /* for leading slash and NUL */
4987 
4988 	TAILQ_FOREACH(pt, parents, entry)
4989 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
4990 		    + 1 /* slash */;
4991 	if (te)
4992 		len += strlen(got_tree_entry_get_name(te));
4993 
4994 	*path = calloc(1, len);
4995 	if (path == NULL)
4996 		return got_error_from_errno("calloc");
4997 
4998 	(*path)[0] = '/';
4999 	pt = TAILQ_LAST(parents, tog_parent_trees);
5000 	while (pt) {
5001 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5002 		if (strlcat(*path, name, len) >= len) {
5003 			err = got_error(GOT_ERR_NO_SPACE);
5004 			goto done;
5005 		}
5006 		if (strlcat(*path, "/", len) >= len) {
5007 			err = got_error(GOT_ERR_NO_SPACE);
5008 			goto done;
5009 		}
5010 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5011 	}
5012 	if (te) {
5013 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5014 			err = got_error(GOT_ERR_NO_SPACE);
5015 			goto done;
5016 		}
5017 	}
5018 done:
5019 	if (err) {
5020 		free(*path);
5021 		*path = NULL;
5022 	}
5023 	return err;
5024 }
5025 
5026 static const struct got_error *
5027 blame_tree_entry(struct tog_view **new_view, int begin_x,
5028     struct got_tree_entry *te, struct tog_parent_trees *parents,
5029     struct got_object_id *commit_id, struct got_repository *repo)
5030 {
5031 	const struct got_error *err = NULL;
5032 	char *path;
5033 	struct tog_view *blame_view;
5034 
5035 	*new_view = NULL;
5036 
5037 	err = tree_entry_path(&path, parents, te);
5038 	if (err)
5039 		return err;
5040 
5041 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5042 	if (blame_view == NULL) {
5043 		err = got_error_from_errno("view_open");
5044 		goto done;
5045 	}
5046 
5047 	err = open_blame_view(blame_view, path, commit_id, repo);
5048 	if (err) {
5049 		if (err->code == GOT_ERR_CANCELLED)
5050 			err = NULL;
5051 		view_close(blame_view);
5052 	} else
5053 		*new_view = blame_view;
5054 done:
5055 	free(path);
5056 	return err;
5057 }
5058 
5059 static const struct got_error *
5060 log_tree_entry(struct tog_view **new_view, int begin_x,
5061     struct got_tree_entry *te, struct tog_parent_trees *parents,
5062     struct got_object_id *commit_id, struct got_repository *repo)
5063 {
5064 	struct tog_view *log_view;
5065 	const struct got_error *err = NULL;
5066 	char *path;
5067 
5068 	*new_view = NULL;
5069 
5070 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5071 	if (log_view == NULL)
5072 		return got_error_from_errno("view_open");
5073 
5074 	err = tree_entry_path(&path, parents, te);
5075 	if (err)
5076 		return err;
5077 
5078 	err = open_log_view(log_view, commit_id, repo, NULL, path, 0);
5079 	if (err)
5080 		view_close(log_view);
5081 	else
5082 		*new_view = log_view;
5083 	free(path);
5084 	return err;
5085 }
5086 
5087 static const struct got_error *
5088 open_tree_view(struct tog_view *view, struct got_tree_object *root,
5089     struct got_object_id *commit_id, struct got_repository *repo)
5090 {
5091 	const struct got_error *err = NULL;
5092 	char *commit_id_str = NULL;
5093 	struct tog_tree_view_state *s = &view->state.tree;
5094 
5095 	TAILQ_INIT(&s->parents);
5096 
5097 	err = got_object_id_str(&commit_id_str, commit_id);
5098 	if (err != NULL)
5099 		goto done;
5100 
5101 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5102 		err = got_error_from_errno("asprintf");
5103 		goto done;
5104 	}
5105 
5106 	s->root = s->tree = root;
5107 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5108 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5109 	s->commit_id = got_object_id_dup(commit_id);
5110 	if (s->commit_id == NULL) {
5111 		err = got_error_from_errno("got_object_id_dup");
5112 		goto done;
5113 	}
5114 	s->repo = repo;
5115 
5116 	SIMPLEQ_INIT(&s->colors);
5117 
5118 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5119 		err = add_color(&s->colors, "\\$$",
5120 		    TOG_COLOR_TREE_SUBMODULE,
5121 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5122 		if (err)
5123 			goto done;
5124 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5125 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5126 		if (err) {
5127 			free_colors(&s->colors);
5128 			goto done;
5129 		}
5130 		err = add_color(&s->colors, "/$",
5131 		    TOG_COLOR_TREE_DIRECTORY,
5132 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5133 		if (err) {
5134 			free_colors(&s->colors);
5135 			goto done;
5136 		}
5137 
5138 		err = add_color(&s->colors, "\\*$",
5139 		    TOG_COLOR_TREE_EXECUTABLE,
5140 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5141 		if (err) {
5142 			free_colors(&s->colors);
5143 			goto done;
5144 		}
5145 
5146 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5147 		    get_color_value("TOG_COLOR_COMMIT"));
5148 		if (err) {
5149 			free_colors(&s->colors);
5150 			goto done;
5151 		}
5152 	}
5153 
5154 	view->show = show_tree_view;
5155 	view->input = input_tree_view;
5156 	view->close = close_tree_view;
5157 	view->search_start = search_start_tree_view;
5158 	view->search_next = search_next_tree_view;
5159 done:
5160 	free(commit_id_str);
5161 	if (err) {
5162 		free(s->tree_label);
5163 		s->tree_label = NULL;
5164 	}
5165 	return err;
5166 }
5167 
5168 static const struct got_error *
5169 close_tree_view(struct tog_view *view)
5170 {
5171 	struct tog_tree_view_state *s = &view->state.tree;
5172 
5173 	free_colors(&s->colors);
5174 	free(s->tree_label);
5175 	s->tree_label = NULL;
5176 	free(s->commit_id);
5177 	s->commit_id = NULL;
5178 	while (!TAILQ_EMPTY(&s->parents)) {
5179 		struct tog_parent_tree *parent;
5180 		parent = TAILQ_FIRST(&s->parents);
5181 		TAILQ_REMOVE(&s->parents, parent, entry);
5182 		free(parent);
5183 
5184 	}
5185 	if (s->tree != s->root)
5186 		got_object_tree_close(s->tree);
5187 	got_object_tree_close(s->root);
5188 	return NULL;
5189 }
5190 
5191 static const struct got_error *
5192 search_start_tree_view(struct tog_view *view)
5193 {
5194 	struct tog_tree_view_state *s = &view->state.tree;
5195 
5196 	s->matched_entry = NULL;
5197 	return NULL;
5198 }
5199 
5200 static int
5201 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5202 {
5203 	regmatch_t regmatch;
5204 
5205 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5206 	    0) == 0;
5207 }
5208 
5209 static const struct got_error *
5210 search_next_tree_view(struct tog_view *view)
5211 {
5212 	struct tog_tree_view_state *s = &view->state.tree;
5213 	struct got_tree_entry *te = NULL;
5214 
5215 	if (!view->searching) {
5216 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5217 		return NULL;
5218 	}
5219 
5220 	if (s->matched_entry) {
5221 		if (view->searching == TOG_SEARCH_FORWARD) {
5222 			if (s->selected_entry)
5223 				te = got_tree_entry_get_next(s->tree,
5224 				    s->selected_entry);
5225 			else
5226 				te = got_object_tree_get_first_entry(s->tree);
5227 		} else {
5228 			if (s->selected_entry == NULL)
5229 				te = got_object_tree_get_last_entry(s->tree);
5230 			else
5231 				te = got_tree_entry_get_prev(s->tree,
5232 				    s->selected_entry);
5233 		}
5234 	} else {
5235 		if (view->searching == TOG_SEARCH_FORWARD)
5236 			te = got_object_tree_get_first_entry(s->tree);
5237 		else
5238 			te = got_object_tree_get_last_entry(s->tree);
5239 	}
5240 
5241 	while (1) {
5242 		if (te == NULL) {
5243 			if (s->matched_entry == NULL) {
5244 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5245 				return NULL;
5246 			}
5247 			if (view->searching == TOG_SEARCH_FORWARD)
5248 				te = got_object_tree_get_first_entry(s->tree);
5249 			else
5250 				te = got_object_tree_get_last_entry(s->tree);
5251 		}
5252 
5253 		if (match_tree_entry(te, &view->regex)) {
5254 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5255 			s->matched_entry = te;
5256 			break;
5257 		}
5258 
5259 		if (view->searching == TOG_SEARCH_FORWARD)
5260 			te = got_tree_entry_get_next(s->tree, te);
5261 		else
5262 			te = got_tree_entry_get_prev(s->tree, te);
5263 	}
5264 
5265 	if (s->matched_entry) {
5266 		s->first_displayed_entry = s->matched_entry;
5267 		s->selected = 0;
5268 	}
5269 
5270 	return NULL;
5271 }
5272 
5273 static const struct got_error *
5274 show_tree_view(struct tog_view *view)
5275 {
5276 	const struct got_error *err = NULL;
5277 	struct tog_tree_view_state *s = &view->state.tree;
5278 	char *parent_path;
5279 
5280 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5281 	if (err)
5282 		return err;
5283 
5284 	err = draw_tree_entries(view, parent_path);
5285 	free(parent_path);
5286 
5287 	view_vborder(view);
5288 	return err;
5289 }
5290 
5291 static const struct got_error *
5292 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
5293     struct tog_view **focus_view, struct tog_view *view, int ch)
5294 {
5295 	const struct got_error *err = NULL;
5296 	struct tog_tree_view_state *s = &view->state.tree;
5297 	struct tog_view *log_view, *ref_view;
5298 	int begin_x = 0;
5299 
5300 	switch (ch) {
5301 	case 'i':
5302 		s->show_ids = !s->show_ids;
5303 		break;
5304 	case 'l':
5305 		if (!s->selected_entry)
5306 			break;
5307 		if (view_is_parent_view(view))
5308 			begin_x = view_split_begin_x(view->begin_x);
5309 		err = log_tree_entry(&log_view, begin_x, s->selected_entry,
5310 		    &s->parents, s->commit_id, s->repo);
5311 		if (view_is_parent_view(view)) {
5312 			err = view_close_child(view);
5313 			if (err)
5314 				return err;
5315 			err = view_set_child(view, log_view);
5316 			if (err) {
5317 				view_close(log_view);
5318 				break;
5319 			}
5320 			*focus_view = log_view;
5321 			view->child_focussed = 1;
5322 		} else
5323 			*new_view = log_view;
5324 		break;
5325 	case 'r':
5326 		if (view_is_parent_view(view))
5327 			begin_x = view_split_begin_x(view->begin_x);
5328 		ref_view = view_open(view->nlines, view->ncols,
5329 		    view->begin_y, begin_x, TOG_VIEW_REF);
5330 		if (ref_view == NULL)
5331 			return got_error_from_errno("view_open");
5332 		err = open_ref_view(ref_view, s->repo);
5333 		if (err) {
5334 			view_close(ref_view);
5335 			return err;
5336 		}
5337 		if (view_is_parent_view(view)) {
5338 			err = view_close_child(view);
5339 			if (err)
5340 				return err;
5341 			err = view_set_child(view, ref_view);
5342 			if (err) {
5343 				view_close(ref_view);
5344 				break;
5345 			}
5346 			*focus_view = ref_view;
5347 			view->child_focussed = 1;
5348 		} else
5349 			*new_view = ref_view;
5350 		break;
5351 	case 'k':
5352 	case KEY_UP:
5353 		if (s->selected > 0) {
5354 			s->selected--;
5355 			break;
5356 		}
5357 		tree_scroll_up(view, 1);
5358 		break;
5359 	case KEY_PPAGE:
5360 	case CTRL('b'):
5361 		if (s->tree == s->root) {
5362 			if (got_object_tree_get_first_entry(s->tree) ==
5363 			    s->first_displayed_entry)
5364 				s->selected = 0;
5365 		} else {
5366 			if (s->first_displayed_entry == NULL)
5367 				s->selected = 0;
5368 		}
5369 		tree_scroll_up(view, MAX(0, view->nlines - 3));
5370 		break;
5371 	case 'j':
5372 	case KEY_DOWN:
5373 		if (s->selected < s->ndisplayed - 1) {
5374 			s->selected++;
5375 			break;
5376 		}
5377 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5378 		    == NULL)
5379 			/* can't scroll any further */
5380 			break;
5381 		tree_scroll_down(view, 1);
5382 		break;
5383 	case KEY_NPAGE:
5384 	case CTRL('f'):
5385 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5386 		    == NULL) {
5387 			/* can't scroll any further; move cursor down */
5388 			if (s->selected < s->ndisplayed - 1)
5389 				s->selected = s->ndisplayed - 1;
5390 			break;
5391 		}
5392 		tree_scroll_down(view, view->nlines - 3);
5393 		break;
5394 	case KEY_ENTER:
5395 	case '\r':
5396 	case KEY_BACKSPACE:
5397 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5398 			struct tog_parent_tree *parent;
5399 			/* user selected '..' */
5400 			if (s->tree == s->root)
5401 				break;
5402 			parent = TAILQ_FIRST(&s->parents);
5403 			TAILQ_REMOVE(&s->parents, parent,
5404 			    entry);
5405 			got_object_tree_close(s->tree);
5406 			s->tree = parent->tree;
5407 			s->first_displayed_entry =
5408 			    parent->first_displayed_entry;
5409 			s->selected_entry =
5410 			    parent->selected_entry;
5411 			s->selected = parent->selected;
5412 			free(parent);
5413 		} else if (S_ISDIR(got_tree_entry_get_mode(
5414 		    s->selected_entry))) {
5415 			struct got_tree_object *subtree;
5416 			err = got_object_open_as_tree(&subtree, s->repo,
5417 			    got_tree_entry_get_id(s->selected_entry));
5418 			if (err)
5419 				break;
5420 			err = tree_view_visit_subtree(subtree, s);
5421 			if (err) {
5422 				got_object_tree_close(subtree);
5423 				break;
5424 			}
5425 		} else if (S_ISREG(got_tree_entry_get_mode(
5426 		    s->selected_entry))) {
5427 			struct tog_view *blame_view;
5428 			int begin_x = view_is_parent_view(view) ?
5429 			    view_split_begin_x(view->begin_x) : 0;
5430 
5431 			err = blame_tree_entry(&blame_view, begin_x,
5432 			    s->selected_entry, &s->parents,
5433 			    s->commit_id, s->repo);
5434 			if (err)
5435 				break;
5436 			if (view_is_parent_view(view)) {
5437 				err = view_close_child(view);
5438 				if (err)
5439 					return err;
5440 				err = view_set_child(view, blame_view);
5441 				if (err) {
5442 					view_close(blame_view);
5443 					break;
5444 				}
5445 				*focus_view = blame_view;
5446 				view->child_focussed = 1;
5447 			} else
5448 				*new_view = blame_view;
5449 		}
5450 		break;
5451 	case KEY_RESIZE:
5452 		if (s->selected > view->nlines)
5453 			s->selected = s->ndisplayed - 1;
5454 		break;
5455 	default:
5456 		break;
5457 	}
5458 
5459 	return err;
5460 }
5461 
5462 __dead static void
5463 usage_tree(void)
5464 {
5465 	endwin();
5466 	fprintf(stderr, "usage: %s tree [-c commit] [-r repository-path] [path]\n",
5467 	    getprogname());
5468 	exit(1);
5469 }
5470 
5471 static const struct got_error *
5472 cmd_tree(int argc, char *argv[])
5473 {
5474 	const struct got_error *error;
5475 	struct got_repository *repo = NULL;
5476 	struct got_worktree *worktree = NULL;
5477 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5478 	struct got_object_id *commit_id = NULL;
5479 	char *commit_id_arg = NULL;
5480 	struct got_commit_object *commit = NULL;
5481 	struct got_tree_object *tree = NULL;
5482 	int ch;
5483 	struct tog_view *view;
5484 
5485 #ifndef PROFILE
5486 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
5487 	    NULL) == -1)
5488 		err(1, "pledge");
5489 #endif
5490 
5491 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5492 		switch (ch) {
5493 		case 'c':
5494 			commit_id_arg = optarg;
5495 			break;
5496 		case 'r':
5497 			repo_path = realpath(optarg, NULL);
5498 			if (repo_path == NULL)
5499 				return got_error_from_errno2("realpath",
5500 				    optarg);
5501 			break;
5502 		default:
5503 			usage_tree();
5504 			/* NOTREACHED */
5505 		}
5506 	}
5507 
5508 	argc -= optind;
5509 	argv += optind;
5510 
5511 	if (argc > 1)
5512 		usage_tree();
5513 
5514 	cwd = getcwd(NULL, 0);
5515 	if (cwd == NULL)
5516 		return got_error_from_errno("getcwd");
5517 
5518 	error = got_worktree_open(&worktree, cwd);
5519 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
5520 		goto done;
5521 
5522 	if (repo_path == NULL) {
5523 		if (worktree)
5524 			repo_path =
5525 			    strdup(got_worktree_get_repo_path(worktree));
5526 		else
5527 			repo_path = strdup(cwd);
5528 	}
5529 	if (repo_path == NULL) {
5530 		error = got_error_from_errno("strdup");
5531 		goto done;
5532 	}
5533 
5534 	error = got_repo_open(&repo, repo_path, NULL);
5535 	if (error != NULL)
5536 		goto done;
5537 
5538 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
5539 	    repo, worktree);
5540 	if (error)
5541 		goto done;
5542 
5543 	init_curses();
5544 
5545 	error = apply_unveil(got_repo_get_path(repo), NULL);
5546 	if (error)
5547 		goto done;
5548 
5549 	error = got_repo_match_object_id(&commit_id, NULL,
5550 	    commit_id_arg ? commit_id_arg : GOT_REF_HEAD,
5551 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
5552 	if (error)
5553 		goto done;
5554 
5555 	error = got_object_open_as_commit(&commit, repo, commit_id);
5556 	if (error)
5557 		goto done;
5558 
5559 	error = got_object_open_as_tree(&tree, repo,
5560 	    got_object_commit_get_tree_id(commit));
5561 	if (error)
5562 		goto done;
5563 
5564 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
5565 	if (view == NULL) {
5566 		error = got_error_from_errno("view_open");
5567 		goto done;
5568 	}
5569 	error = open_tree_view(view, tree, commit_id, repo);
5570 	if (error)
5571 		goto done;
5572 	if (!got_path_is_root_dir(in_repo_path)) {
5573 		error = tree_view_walk_path(&view->state.tree, commit_id,
5574 		    in_repo_path, repo);
5575 		if (error)
5576 			goto done;
5577 	}
5578 
5579 	if (worktree) {
5580 		/* Release work tree lock. */
5581 		got_worktree_close(worktree);
5582 		worktree = NULL;
5583 	}
5584 	error = view_loop(view);
5585 done:
5586 	free(repo_path);
5587 	free(cwd);
5588 	free(commit_id);
5589 	if (commit)
5590 		got_object_commit_close(commit);
5591 	if (tree)
5592 		got_object_tree_close(tree);
5593 	if (repo)
5594 		got_repo_close(repo);
5595 	return error;
5596 }
5597 
5598 static const struct got_error *
5599 ref_view_load_refs(struct tog_ref_view_state *s)
5600 {
5601 	const struct got_error *err;
5602 	struct got_reflist_entry *sre;
5603 	struct tog_reflist_entry *re;
5604 
5605 	err = got_ref_list(&s->simplerefs, s->repo, NULL,
5606 	    got_ref_cmp_by_name, NULL);
5607 	if (err)
5608 		return err;
5609 
5610 	s->nrefs = 0;
5611 	SIMPLEQ_FOREACH(sre, &s->simplerefs, entry) {
5612 		if (strncmp(got_ref_get_name(sre->ref), "refs/got/", 9) == 0)
5613 			continue;
5614 
5615 		re = malloc(sizeof(*re));
5616 		if (re == NULL)
5617 			return got_error_from_errno("malloc");
5618 
5619 		re->ref = sre->ref;
5620 		re->idx = s->nrefs++;
5621 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
5622 	}
5623 
5624 	return NULL;
5625 }
5626 
5627 void
5628 ref_view_free_refs(struct tog_ref_view_state *s)
5629 {
5630 	struct tog_reflist_entry *re;
5631 
5632 	while (!TAILQ_EMPTY(&s->refs)) {
5633 		re = TAILQ_FIRST(&s->refs);
5634 		TAILQ_REMOVE(&s->refs, re, entry);
5635 		free(re);
5636 	}
5637 	got_ref_list_free(&s->simplerefs);
5638 }
5639 
5640 static const struct got_error *
5641 open_ref_view(struct tog_view *view, struct got_repository *repo)
5642 {
5643 	const struct got_error *err = NULL;
5644 	struct tog_ref_view_state *s = &view->state.ref;
5645 
5646 	s->selected_entry = 0;
5647 	s->repo = repo;
5648 
5649 	SIMPLEQ_INIT(&s->simplerefs);
5650 	TAILQ_INIT(&s->refs);
5651 	SIMPLEQ_INIT(&s->colors);
5652 
5653 	err = ref_view_load_refs(s);
5654 	if (err)
5655 		return err;
5656 
5657 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
5658 
5659 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5660 		err = add_color(&s->colors, "^refs/heads/",
5661 		    TOG_COLOR_REFS_HEADS,
5662 		    get_color_value("TOG_COLOR_REFS_HEADS"));
5663 		if (err)
5664 			goto done;
5665 
5666 		err = add_color(&s->colors, "^refs/tags/",
5667 		    TOG_COLOR_REFS_TAGS,
5668 		    get_color_value("TOG_COLOR_REFS_TAGS"));
5669 		if (err)
5670 			goto done;
5671 
5672 		err = add_color(&s->colors, "^refs/remotes/",
5673 		    TOG_COLOR_REFS_REMOTES,
5674 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
5675 		if (err)
5676 			goto done;
5677 	}
5678 
5679 	view->show = show_ref_view;
5680 	view->input = input_ref_view;
5681 	view->close = close_ref_view;
5682 	view->search_start = search_start_ref_view;
5683 	view->search_next = search_next_ref_view;
5684 done:
5685 	if (err)
5686 		free_colors(&s->colors);
5687 	return err;
5688 }
5689 
5690 static const struct got_error *
5691 close_ref_view(struct tog_view *view)
5692 {
5693 	struct tog_ref_view_state *s = &view->state.ref;
5694 
5695 	ref_view_free_refs(s);
5696 	free_colors(&s->colors);
5697 
5698 	return NULL;
5699 }
5700 
5701 static const struct got_error *
5702 resolve_reflist_entry(struct got_object_id **commit_id,
5703     struct tog_reflist_entry *re, struct got_repository *repo)
5704 {
5705 	const struct got_error *err = NULL;
5706 	struct got_object_id *obj_id;
5707 	struct got_tag_object *tag = NULL;
5708 	int obj_type;
5709 
5710 	*commit_id = NULL;
5711 
5712 	err = got_ref_resolve(&obj_id, repo, re->ref);
5713 	if (err)
5714 		return err;
5715 
5716 	err = got_object_get_type(&obj_type, repo, obj_id);
5717 	if (err)
5718 		goto done;
5719 
5720 	switch (obj_type) {
5721 	case GOT_OBJ_TYPE_COMMIT:
5722 		*commit_id = obj_id;
5723 		break;
5724 	case GOT_OBJ_TYPE_TAG:
5725 		err = got_object_open_as_tag(&tag, repo, obj_id);
5726 		if (err)
5727 			goto done;
5728 		free(obj_id);
5729 		err = got_object_get_type(&obj_type, repo,
5730 		    got_object_tag_get_object_id(tag));
5731 		if (err)
5732 			goto done;
5733 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
5734 			err = got_error(GOT_ERR_OBJ_TYPE);
5735 			goto done;
5736 		}
5737 		*commit_id = got_object_id_dup(
5738 		    got_object_tag_get_object_id(tag));
5739 		if (*commit_id == NULL) {
5740 			err = got_error_from_errno("got_object_id_dup");
5741 			goto done;
5742 		}
5743 		break;
5744 	default:
5745 		err = got_error(GOT_ERR_OBJ_TYPE);
5746 		break;
5747 	}
5748 
5749 done:
5750 	if (tag)
5751 		got_object_tag_close(tag);
5752 	if (err) {
5753 		free(*commit_id);
5754 		*commit_id = NULL;
5755 	}
5756 	return err;
5757 }
5758 
5759 static const struct got_error *
5760 log_ref_entry(struct tog_view **new_view, int begin_x,
5761     struct tog_reflist_entry *re, struct got_repository *repo)
5762 {
5763 	struct tog_view *log_view;
5764 	const struct got_error *err = NULL;
5765 	struct got_object_id *commit_id = NULL;
5766 
5767 	*new_view = NULL;
5768 
5769 	err = resolve_reflist_entry(&commit_id, re, repo);
5770 	if (err) {
5771 		if (err->code != GOT_ERR_OBJ_TYPE)
5772 			return err;
5773 		else
5774 			return NULL;
5775 	}
5776 
5777 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5778 	if (log_view == NULL) {
5779 		err = got_error_from_errno("view_open");
5780 		goto done;
5781 	}
5782 
5783 	err = open_log_view(log_view, commit_id, repo, NULL, "", 0);
5784 done:
5785 	if (err)
5786 		view_close(log_view);
5787 	else
5788 		*new_view = log_view;
5789 	free(commit_id);
5790 	return err;
5791 }
5792 
5793 static void
5794 ref_scroll_up(struct tog_view *view, int maxscroll)
5795 {
5796 	struct tog_ref_view_state *s = &view->state.ref;
5797 	struct tog_reflist_entry *re;
5798 	int i = 0;
5799 
5800 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
5801 		return;
5802 
5803 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
5804 	while (i++ < maxscroll) {
5805 		if (re == NULL)
5806 			break;
5807 		s->first_displayed_entry = re;
5808 		re = TAILQ_PREV(re, tog_reflist_head, entry);
5809 	}
5810 }
5811 
5812 static void
5813 ref_scroll_down(struct tog_view *view, int maxscroll)
5814 {
5815 	struct tog_ref_view_state *s = &view->state.ref;
5816 	struct tog_reflist_entry *next, *last;
5817 	int n = 0;
5818 
5819 	if (s->first_displayed_entry)
5820 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
5821 	else
5822 		next = TAILQ_FIRST(&s->refs);
5823 
5824 	last = s->last_displayed_entry;
5825 	while (next && last && n++ < maxscroll) {
5826 		last = TAILQ_NEXT(last, entry);
5827 		if (last) {
5828 			s->first_displayed_entry = next;
5829 			next = TAILQ_NEXT(next, entry);
5830 		}
5831 	}
5832 }
5833 
5834 static const struct got_error *
5835 search_start_ref_view(struct tog_view *view)
5836 {
5837 	struct tog_ref_view_state *s = &view->state.ref;
5838 
5839 	s->matched_entry = NULL;
5840 	return NULL;
5841 }
5842 
5843 static int
5844 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
5845 {
5846 	regmatch_t regmatch;
5847 
5848 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
5849 	    0) == 0;
5850 }
5851 
5852 static const struct got_error *
5853 search_next_ref_view(struct tog_view *view)
5854 {
5855 	struct tog_ref_view_state *s = &view->state.ref;
5856 	struct tog_reflist_entry *re = NULL;
5857 
5858 	if (!view->searching) {
5859 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5860 		return NULL;
5861 	}
5862 
5863 	if (s->matched_entry) {
5864 		if (view->searching == TOG_SEARCH_FORWARD) {
5865 			if (s->selected_entry)
5866 				re = TAILQ_NEXT(s->selected_entry, entry);
5867 			else
5868 				re = TAILQ_PREV(s->selected_entry,
5869 				    tog_reflist_head, entry);
5870 		} else {
5871 			if (s->selected_entry == NULL)
5872 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5873 			else
5874 				re = TAILQ_PREV(s->selected_entry,
5875 				    tog_reflist_head, entry);
5876 		}
5877 	} else {
5878 		if (view->searching == TOG_SEARCH_FORWARD)
5879 			re = TAILQ_FIRST(&s->refs);
5880 		else
5881 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
5882 	}
5883 
5884 	while (1) {
5885 		if (re == NULL) {
5886 			if (s->matched_entry == NULL) {
5887 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5888 				return NULL;
5889 			}
5890 			if (view->searching == TOG_SEARCH_FORWARD)
5891 				re = TAILQ_FIRST(&s->refs);
5892 			else
5893 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5894 		}
5895 
5896 		if (match_reflist_entry(re, &view->regex)) {
5897 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5898 			s->matched_entry = re;
5899 			break;
5900 		}
5901 
5902 		if (view->searching == TOG_SEARCH_FORWARD)
5903 			re = TAILQ_NEXT(re, entry);
5904 		else
5905 			re = TAILQ_PREV(re, tog_reflist_head, entry);
5906 	}
5907 
5908 	if (s->matched_entry) {
5909 		s->first_displayed_entry = s->matched_entry;
5910 		s->selected = 0;
5911 	}
5912 
5913 	return NULL;
5914 }
5915 
5916 static const struct got_error *
5917 show_ref_view(struct tog_view *view)
5918 {
5919 	const struct got_error *err = NULL;
5920 	struct tog_ref_view_state *s = &view->state.ref;
5921 	struct tog_reflist_entry *re;
5922 	char *line = NULL;
5923 	wchar_t *wline;
5924 	struct tog_color *tc;
5925 	int width, n;
5926 	int limit = view->nlines;
5927 
5928 	werase(view->window);
5929 
5930 	s->ndisplayed = 0;
5931 
5932 	if (limit == 0)
5933 		return NULL;
5934 
5935 	re = s->first_displayed_entry;
5936 
5937 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
5938 	    s->nrefs) == -1)
5939 		return got_error_from_errno("asprintf");
5940 
5941 	err = format_line(&wline, &width, line, view->ncols, 0);
5942 	if (err) {
5943 		free(line);
5944 		return err;
5945 	}
5946 	if (view_needs_focus_indication(view))
5947 		wstandout(view->window);
5948 	waddwstr(view->window, wline);
5949 	if (view_needs_focus_indication(view))
5950 		wstandend(view->window);
5951 	free(wline);
5952 	wline = NULL;
5953 	free(line);
5954 	line = NULL;
5955 	if (width < view->ncols - 1)
5956 		waddch(view->window, '\n');
5957 	if (--limit <= 0)
5958 		return NULL;
5959 
5960 	n = 0;
5961 	while (re && limit > 0) {
5962 		char *line = NULL;
5963 
5964 		if (got_ref_is_symbolic(re->ref)) {
5965 			if (asprintf(&line, "%s -> %s",
5966 			    got_ref_get_name(re->ref),
5967 			    got_ref_get_symref_target(re->ref)) == -1)
5968 				return got_error_from_errno("asprintf");
5969 		} else if (s->show_ids) {
5970 			struct got_object_id *id;
5971 			char *id_str;
5972 			err = got_ref_resolve(&id, s->repo, re->ref);
5973 			if (err)
5974 				return err;
5975 			err = got_object_id_str(&id_str, id);
5976 			if (err) {
5977 				free(id);
5978 				return err;
5979 			}
5980 			if (asprintf(&line, "%s: %s",
5981 			    got_ref_get_name(re->ref), id_str) == -1) {
5982 				err = got_error_from_errno("asprintf");
5983 				free(id);
5984 				free(id_str);
5985 				return err;
5986 			}
5987 			free(id);
5988 			free(id_str);
5989 		} else {
5990 			line = strdup(got_ref_get_name(re->ref));
5991 			if (line == NULL)
5992 				return got_error_from_errno("strdup");
5993 		}
5994 
5995 		err = format_line(&wline, &width, line, view->ncols, 0);
5996 		if (err) {
5997 			free(line);
5998 			return err;
5999 		}
6000 		if (n == s->selected) {
6001 			if (view->focussed)
6002 				wstandout(view->window);
6003 			s->selected_entry = re;
6004 		}
6005 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6006 		if (tc)
6007 			wattr_on(view->window,
6008 			    COLOR_PAIR(tc->colorpair), NULL);
6009 		waddwstr(view->window, wline);
6010 		if (tc)
6011 			wattr_off(view->window,
6012 			    COLOR_PAIR(tc->colorpair), NULL);
6013 		if (width < view->ncols - 1)
6014 			waddch(view->window, '\n');
6015 		if (n == s->selected && view->focussed)
6016 			wstandend(view->window);
6017 		free(line);
6018 		free(wline);
6019 		wline = NULL;
6020 		n++;
6021 		s->ndisplayed++;
6022 		s->last_displayed_entry = re;
6023 
6024 		limit--;
6025 		re = TAILQ_NEXT(re, entry);
6026 	}
6027 
6028 	view_vborder(view);
6029 	return err;
6030 }
6031 
6032 static const struct got_error *
6033 browse_ref_tree(struct tog_view **new_view, int begin_x,
6034     struct tog_reflist_entry *re, struct got_repository *repo)
6035 {
6036 	const struct got_error *err = NULL;
6037 	struct got_object_id *commit_id = NULL, *tree_id = NULL;
6038 	struct got_tree_object *tree = NULL;
6039 	struct tog_view *tree_view;
6040 
6041 	*new_view = NULL;
6042 
6043 	err = resolve_reflist_entry(&commit_id, re, repo);
6044 	if (err) {
6045 		if (err->code != GOT_ERR_OBJ_TYPE)
6046 			return err;
6047 		else
6048 			return NULL;
6049 	}
6050 
6051 	err = got_object_id_by_path(&tree_id, repo, commit_id, "/");
6052 	if (err)
6053 		goto done;
6054 
6055 	err = got_object_open_as_tree(&tree, repo, tree_id);
6056 	if (err)
6057 		goto done;
6058 
6059 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6060 	if (tree_view == NULL) {
6061 		err = got_error_from_errno("view_open");
6062 		goto done;
6063 	}
6064 
6065 	err = open_tree_view(tree_view, tree, commit_id, repo);
6066 	if (err)
6067 		goto done;
6068 
6069 	*new_view = tree_view;
6070 done:
6071 	free(commit_id);
6072 	free(tree_id);
6073 	if (err) {
6074 		if (tree)
6075 			got_object_tree_close(tree);
6076 	}
6077 	return err;
6078 }
6079 static const struct got_error *
6080 input_ref_view(struct tog_view **new_view, struct tog_view **dead_view,
6081     struct tog_view **focus_view, struct tog_view *view, int ch)
6082 {
6083 	const struct got_error *err = NULL;
6084 	struct tog_ref_view_state *s = &view->state.ref;
6085 	struct tog_view *log_view, *tree_view;
6086 	int begin_x = 0;
6087 
6088 	switch (ch) {
6089 	case 'i':
6090 		s->show_ids = !s->show_ids;
6091 		break;
6092 	case KEY_ENTER:
6093 	case '\r':
6094 		if (!s->selected_entry)
6095 			break;
6096 		if (view_is_parent_view(view))
6097 			begin_x = view_split_begin_x(view->begin_x);
6098 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6099 		    s->repo);
6100 		if (view_is_parent_view(view)) {
6101 			err = view_close_child(view);
6102 			if (err)
6103 				return err;
6104 			err = view_set_child(view, log_view);
6105 			if (err) {
6106 				view_close(log_view);
6107 				break;
6108 			}
6109 			*focus_view = log_view;
6110 			view->child_focussed = 1;
6111 		} else
6112 			*new_view = log_view;
6113 		break;
6114 	case 't':
6115 		if (!s->selected_entry)
6116 			break;
6117 		if (view_is_parent_view(view))
6118 			begin_x = view_split_begin_x(view->begin_x);
6119 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6120 		    s->repo);
6121 		if (err || tree_view == NULL)
6122 			break;
6123 		if (view_is_parent_view(view)) {
6124 			err = view_close_child(view);
6125 			if (err)
6126 				return err;
6127 			err = view_set_child(view, tree_view);
6128 			if (err) {
6129 				view_close(tree_view);
6130 				break;
6131 			}
6132 			*focus_view = tree_view;
6133 			view->child_focussed = 1;
6134 		} else
6135 			*new_view = tree_view;
6136 		break;
6137 	case 'k':
6138 	case KEY_UP:
6139 		if (s->selected > 0) {
6140 			s->selected--;
6141 			break;
6142 		}
6143 		ref_scroll_up(view, 1);
6144 		break;
6145 	case KEY_PPAGE:
6146 	case CTRL('b'):
6147 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6148 			s->selected = 0;
6149 		ref_scroll_up(view, MAX(0, view->nlines - 1));
6150 		break;
6151 	case 'j':
6152 	case KEY_DOWN:
6153 		if (s->selected < s->ndisplayed - 1) {
6154 			s->selected++;
6155 			break;
6156 		}
6157 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6158 			/* can't scroll any further */
6159 			break;
6160 		ref_scroll_down(view, 1);
6161 		break;
6162 	case KEY_NPAGE:
6163 	case CTRL('f'):
6164 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6165 			/* can't scroll any further; move cursor down */
6166 			if (s->selected < s->ndisplayed - 1)
6167 				s->selected = s->ndisplayed - 1;
6168 			break;
6169 		}
6170 		ref_scroll_down(view, view->nlines - 1);
6171 		break;
6172 	case CTRL('l'):
6173 		ref_view_free_refs(s);
6174 		err = ref_view_load_refs(s);
6175 		break;
6176 	case KEY_RESIZE:
6177 		if (s->selected > view->nlines)
6178 			s->selected = s->ndisplayed - 1;
6179 		break;
6180 	default:
6181 		break;
6182 	}
6183 
6184 	return err;
6185 }
6186 
6187 __dead static void
6188 usage_ref(void)
6189 {
6190 	endwin();
6191 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6192 	    getprogname());
6193 	exit(1);
6194 }
6195 
6196 static const struct got_error *
6197 cmd_ref(int argc, char *argv[])
6198 {
6199 	const struct got_error *error;
6200 	struct got_repository *repo = NULL;
6201 	struct got_worktree *worktree = NULL;
6202 	char *cwd = NULL, *repo_path = NULL;
6203 	int ch;
6204 	struct tog_view *view;
6205 
6206 #ifndef PROFILE
6207 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
6208 	    NULL) == -1)
6209 		err(1, "pledge");
6210 #endif
6211 
6212 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6213 		switch (ch) {
6214 		case 'r':
6215 			repo_path = realpath(optarg, NULL);
6216 			if (repo_path == NULL)
6217 				return got_error_from_errno2("realpath",
6218 				    optarg);
6219 			break;
6220 		default:
6221 			usage_ref();
6222 			/* NOTREACHED */
6223 		}
6224 	}
6225 
6226 	argc -= optind;
6227 	argv += optind;
6228 
6229 	if (argc > 1)
6230 		usage_ref();
6231 
6232 	cwd = getcwd(NULL, 0);
6233 	if (cwd == NULL)
6234 		return got_error_from_errno("getcwd");
6235 
6236 	error = got_worktree_open(&worktree, cwd);
6237 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6238 		goto done;
6239 
6240 	if (repo_path == NULL) {
6241 		if (worktree)
6242 			repo_path =
6243 			    strdup(got_worktree_get_repo_path(worktree));
6244 		else
6245 			repo_path = strdup(cwd);
6246 	}
6247 	if (repo_path == NULL) {
6248 		error = got_error_from_errno("strdup");
6249 		goto done;
6250 	}
6251 
6252 	error = got_repo_open(&repo, repo_path, NULL);
6253 	if (error != NULL)
6254 		goto done;
6255 
6256 	init_curses();
6257 
6258 	error = apply_unveil(got_repo_get_path(repo), NULL);
6259 	if (error)
6260 		goto done;
6261 
6262 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6263 	if (view == NULL) {
6264 		error = got_error_from_errno("view_open");
6265 		goto done;
6266 	}
6267 
6268 	error = open_ref_view(view, repo);
6269 	if (error)
6270 		goto done;
6271 
6272 	if (worktree) {
6273 		/* Release work tree lock. */
6274 		got_worktree_close(worktree);
6275 		worktree = NULL;
6276 	}
6277 	error = view_loop(view);
6278 done:
6279 	free(repo_path);
6280 	free(cwd);
6281 	if (repo)
6282 		got_repo_close(repo);
6283 	return error;
6284 }
6285 
6286 static void
6287 list_commands(FILE *fp)
6288 {
6289 	int i;
6290 
6291 	fprintf(fp, "commands:");
6292 	for (i = 0; i < nitems(tog_commands); i++) {
6293 		struct tog_cmd *cmd = &tog_commands[i];
6294 		fprintf(fp, " %s", cmd->name);
6295 	}
6296 	fputc('\n', fp);
6297 }
6298 
6299 __dead static void
6300 usage(int hflag, int status)
6301 {
6302 	FILE *fp = (status == 0) ? stdout : stderr;
6303 
6304 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
6305 	    getprogname());
6306 	if (hflag) {
6307 		fprintf(fp, "lazy usage: %s path\n", getprogname());
6308 		list_commands(fp);
6309 	}
6310 	exit(status);
6311 }
6312 
6313 static char **
6314 make_argv(int argc, ...)
6315 {
6316 	va_list ap;
6317 	char **argv;
6318 	int i;
6319 
6320 	va_start(ap, argc);
6321 
6322 	argv = calloc(argc, sizeof(char *));
6323 	if (argv == NULL)
6324 		err(1, "calloc");
6325 	for (i = 0; i < argc; i++) {
6326 		argv[i] = strdup(va_arg(ap, char *));
6327 		if (argv[i] == NULL)
6328 			err(1, "strdup");
6329 	}
6330 
6331 	va_end(ap);
6332 	return argv;
6333 }
6334 
6335 /*
6336  * Try to convert 'tog path' into a 'tog log path' command.
6337  * The user could simply have mistyped the command rather than knowingly
6338  * provided a path. So check whether argv[0] can in fact be resolved
6339  * to a path in the HEAD commit and print a special error if not.
6340  * This hack is for mpi@ <3
6341  */
6342 static const struct got_error *
6343 tog_log_with_path(int argc, char *argv[])
6344 {
6345 	const struct got_error *error = NULL;
6346 	struct tog_cmd *cmd = NULL;
6347 	struct got_repository *repo = NULL;
6348 	struct got_worktree *worktree = NULL;
6349 	struct got_object_id *commit_id = NULL, *id = NULL;
6350 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6351 	char *commit_id_str = NULL, **cmd_argv = NULL;
6352 
6353 	cwd = getcwd(NULL, 0);
6354 	if (cwd == NULL)
6355 		return got_error_from_errno("getcwd");
6356 
6357 	error = got_worktree_open(&worktree, cwd);
6358 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6359 		goto done;
6360 
6361 	if (worktree)
6362 		repo_path = strdup(got_worktree_get_repo_path(worktree));
6363 	else
6364 		repo_path = strdup(cwd);
6365 	if (repo_path == NULL) {
6366 		error = got_error_from_errno("strdup");
6367 		goto done;
6368 	}
6369 
6370 	error = got_repo_open(&repo, repo_path, NULL);
6371 	if (error != NULL)
6372 		goto done;
6373 
6374 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6375 	    repo, worktree);
6376 	if (error)
6377 		goto done;
6378 
6379 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
6380 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
6381 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
6382 	if (error)
6383 		goto done;
6384 
6385 	if (worktree) {
6386 		got_worktree_close(worktree);
6387 		worktree = NULL;
6388 	}
6389 
6390 	error = got_object_id_by_path(&id, repo, commit_id, in_repo_path);
6391 	if (error) {
6392 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
6393 			goto done;
6394 		fprintf(stderr, "%s: '%s' is no known command or path\n",
6395 		    getprogname(), argv[0]);
6396 		usage(1, 1);
6397 		/* not reached */
6398 	}
6399 
6400 	got_repo_close(repo);
6401 	repo = NULL;
6402 
6403 	error = got_object_id_str(&commit_id_str, commit_id);
6404 	if (error)
6405 		goto done;
6406 
6407 	cmd = &tog_commands[0]; /* log */
6408 	argc = 4;
6409 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
6410 	error = cmd->cmd_main(argc, cmd_argv);
6411 done:
6412 	if (repo)
6413 		got_repo_close(repo);
6414 	if (worktree)
6415 		got_worktree_close(worktree);
6416 	free(id);
6417 	free(commit_id_str);
6418 	free(commit_id);
6419 	free(cwd);
6420 	free(repo_path);
6421 	free(in_repo_path);
6422 	if (cmd_argv) {
6423 		int i;
6424 		for (i = 0; i < argc; i++)
6425 			free(cmd_argv[i]);
6426 		free(cmd_argv);
6427 	}
6428 	return error;
6429 }
6430 
6431 int
6432 main(int argc, char *argv[])
6433 {
6434 	const struct got_error *error = NULL;
6435 	struct tog_cmd *cmd = NULL;
6436 	int ch, hflag = 0, Vflag = 0;
6437 	char **cmd_argv = NULL;
6438 	static struct option longopts[] = {
6439 	    { "version", no_argument, NULL, 'V' },
6440 	    { NULL, 0, NULL, 0}
6441 	};
6442 
6443 	setlocale(LC_CTYPE, "");
6444 
6445 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
6446 		switch (ch) {
6447 		case 'h':
6448 			hflag = 1;
6449 			break;
6450 		case 'V':
6451 			Vflag = 1;
6452 			break;
6453 		default:
6454 			usage(hflag, 1);
6455 			/* NOTREACHED */
6456 		}
6457 	}
6458 
6459 	argc -= optind;
6460 	argv += optind;
6461 	optind = 1;
6462 	optreset = 1;
6463 
6464 	if (Vflag) {
6465 		got_version_print_str();
6466 		return 0;
6467 	}
6468 
6469 	if (argc == 0) {
6470 		if (hflag)
6471 			usage(hflag, 0);
6472 		/* Build an argument vector which runs a default command. */
6473 		cmd = &tog_commands[0];
6474 		argc = 1;
6475 		cmd_argv = make_argv(argc, cmd->name);
6476 	} else {
6477 		int i;
6478 
6479 		/* Did the user specify a command? */
6480 		for (i = 0; i < nitems(tog_commands); i++) {
6481 			if (strncmp(tog_commands[i].name, argv[0],
6482 			    strlen(argv[0])) == 0) {
6483 				cmd = &tog_commands[i];
6484 				break;
6485 			}
6486 		}
6487 	}
6488 
6489 	if (cmd == NULL) {
6490 		if (argc != 1)
6491 			usage(0, 1);
6492 		/* No command specified; try log with a path */
6493 		error = tog_log_with_path(argc, argv);
6494 	} else {
6495 		if (hflag)
6496 			cmd->cmd_usage();
6497 		else
6498 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
6499 	}
6500 
6501 	endwin();
6502 	putchar('\n');
6503 	if (cmd_argv) {
6504 		int i;
6505 		for (i = 0; i < argc; i++)
6506 			free(cmd_argv[i]);
6507 		free(cmd_argv);
6508 	}
6509 
6510 	if (error && error->code != GOT_ERR_CANCELLED)
6511 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
6512 	return 0;
6513 }