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, struct got_reflist_head *refs,
1281     const size_t date_display_cols, int author_display_cols,
1282     struct tog_colors *colors)
1283 {
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(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(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(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, struct commit_queue_entry **last,
1525     struct commit_queue_entry **selected, struct commit_queue_entry *first,
1526     struct commit_queue *commits, int selected_idx, int limit,
1527     struct got_reflist_head *refs, const char *path, int commits_needed,
1528     struct tog_colors *colors)
1529 {
1530 	const struct got_error *err = NULL;
1531 	struct tog_log_view_state *s = &view->state.log;
1532 	struct commit_queue_entry *entry;
1533 	int width;
1534 	int ncommits, author_cols = 4;
1535 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1536 	char *refs_str = NULL;
1537 	wchar_t *wline;
1538 	struct tog_color *tc;
1539 	static const size_t date_display_cols = 12;
1540 
1541 	entry = first;
1542 	ncommits = 0;
1543 	while (entry) {
1544 		if (ncommits == selected_idx) {
1545 			*selected = entry;
1546 			break;
1547 		}
1548 		entry = TAILQ_NEXT(entry, entry);
1549 		ncommits++;
1550 	}
1551 
1552 	if (*selected && !(view->searching && view->search_next_done == 0)) {
1553 		err = got_object_id_str(&id_str, (*selected)->id);
1554 		if (err)
1555 			return err;
1556 		if (refs) {
1557 			err = build_refs_str(&refs_str, refs, (*selected)->id,
1558 			    s->repo);
1559 			if (err)
1560 				goto done;
1561 		}
1562 	}
1563 
1564 	if (commits_needed == 0)
1565 		halfdelay(10); /* disable fast refresh */
1566 
1567 	if (commits_needed > 0) {
1568 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1569 		    entry ? entry->idx + 1 : 0, commits->ncommits,
1570 		    (view->searching && !view->search_next_done) ?
1571 		    "searching..." : "loading...") == -1) {
1572 			err = got_error_from_errno("asprintf");
1573 			goto done;
1574 		}
1575 	} else {
1576 		const char *search_str = NULL;
1577 
1578 		if (view->searching) {
1579 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
1580 				search_str = "no more matches";
1581 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
1582 				search_str = "no matches found";
1583 			else if (!view->search_next_done)
1584 				search_str = "searching...";
1585 		}
1586 
1587 		if (asprintf(&ncommits_str, " [%d/%d] %s",
1588 		    entry ? entry->idx + 1 : 0, commits->ncommits,
1589 		    search_str ? search_str :
1590 		    (refs_str ? refs_str : "")) == -1) {
1591 			err = got_error_from_errno("asprintf");
1592 			goto done;
1593 		}
1594 	}
1595 
1596 	if (path && strcmp(path, "/") != 0) {
1597 		if (asprintf(&header, "commit %s %s%s",
1598 		    id_str ? id_str : "........................................",
1599 		    path, ncommits_str) == -1) {
1600 			err = got_error_from_errno("asprintf");
1601 			header = NULL;
1602 			goto done;
1603 		}
1604 	} else if (asprintf(&header, "commit %s%s",
1605 	    id_str ? id_str : "........................................",
1606 	    ncommits_str) == -1) {
1607 		err = got_error_from_errno("asprintf");
1608 		header = NULL;
1609 		goto done;
1610 	}
1611 	err = format_line(&wline, &width, header, view->ncols, 0);
1612 	if (err)
1613 		goto done;
1614 
1615 	werase(view->window);
1616 
1617 	if (view_needs_focus_indication(view))
1618 		wstandout(view->window);
1619 	tc = get_color(colors, TOG_COLOR_COMMIT);
1620 	if (tc)
1621 		wattr_on(view->window,
1622 		    COLOR_PAIR(tc->colorpair), NULL);
1623 	waddwstr(view->window, wline);
1624 	if (tc)
1625 		wattr_off(view->window,
1626 		    COLOR_PAIR(tc->colorpair), NULL);
1627 	while (width < view->ncols) {
1628 		waddch(view->window, ' ');
1629 		width++;
1630 	}
1631 	if (view_needs_focus_indication(view))
1632 		wstandend(view->window);
1633 	free(wline);
1634 	if (limit <= 1)
1635 		goto done;
1636 
1637 	/* Grow author column size if necessary. */
1638 	entry = first;
1639 	ncommits = 0;
1640 	while (entry) {
1641 		char *author;
1642 		wchar_t *wauthor;
1643 		int width;
1644 		if (ncommits >= limit - 1)
1645 			break;
1646 		author = strdup(got_object_commit_get_author(entry->commit));
1647 		if (author == NULL) {
1648 			err = got_error_from_errno("strdup");
1649 			goto done;
1650 		}
1651 		err = format_author(&wauthor, &width, author, COLS,
1652 		    date_display_cols);
1653 		if (author_cols < width)
1654 			author_cols = width;
1655 		free(wauthor);
1656 		free(author);
1657 		ncommits++;
1658 		entry = TAILQ_NEXT(entry, entry);
1659 	}
1660 
1661 	entry = first;
1662 	*last = first;
1663 	ncommits = 0;
1664 	while (entry) {
1665 		if (ncommits >= limit - 1)
1666 			break;
1667 		if (ncommits == selected_idx)
1668 			wstandout(view->window);
1669 		err = draw_commit(view, entry->commit, entry->id, refs,
1670 		    date_display_cols, author_cols, colors);
1671 		if (ncommits == selected_idx)
1672 			wstandend(view->window);
1673 		if (err)
1674 			goto done;
1675 		ncommits++;
1676 		*last = entry;
1677 		entry = TAILQ_NEXT(entry, entry);
1678 	}
1679 
1680 	view_vborder(view);
1681 done:
1682 	free(id_str);
1683 	free(refs_str);
1684 	free(ncommits_str);
1685 	free(header);
1686 	return err;
1687 }
1688 
1689 static void
1690 log_scroll_up(struct tog_view *view, int maxscroll)
1691 {
1692 	struct tog_log_view_state *s = &view->state.log;
1693 	struct commit_queue_entry *entry;
1694 	int nscrolled = 0;
1695 
1696 	entry = TAILQ_FIRST(&s->commits.head);
1697 	if (s->first_displayed_entry == entry)
1698 		return;
1699 
1700 	entry = s->first_displayed_entry;
1701 	while (entry && nscrolled < maxscroll) {
1702 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1703 		if (entry) {
1704 			s->first_displayed_entry = entry;
1705 			nscrolled++;
1706 		}
1707 	}
1708 }
1709 
1710 static const struct got_error *
1711 trigger_log_thread(struct tog_view *view, int wait)
1712 {
1713 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
1714 	int errcode;
1715 
1716 	halfdelay(1); /* fast refresh while loading commits */
1717 
1718 	while (ta->commits_needed > 0) {
1719 		if (ta->log_complete)
1720 			break;
1721 
1722 		/* Wake the log thread. */
1723 		errcode = pthread_cond_signal(&ta->need_commits);
1724 		if (errcode)
1725 			return got_error_set_errno(errcode,
1726 			    "pthread_cond_signal");
1727 
1728 		/*
1729 		 * The mutex will be released while the view loop waits
1730 		 * in wgetch(), at which time the log thread will run.
1731 		 */
1732 		if (!wait)
1733 			break;
1734 
1735 		/* Display progress update in log view. */
1736 		show_log_view(view);
1737 		update_panels();
1738 		doupdate();
1739 
1740 		/* Wait right here while next commit is being loaded. */
1741 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
1742 		if (errcode)
1743 			return got_error_set_errno(errcode,
1744 			    "pthread_cond_wait");
1745 
1746 		/* Display progress update in log view. */
1747 		show_log_view(view);
1748 		update_panels();
1749 		doupdate();
1750 	}
1751 
1752 	return NULL;
1753 }
1754 
1755 static const struct got_error *
1756 log_scroll_down(struct tog_view *view, int maxscroll)
1757 {
1758 	struct tog_log_view_state *s = &view->state.log;
1759 	const struct got_error *err = NULL;
1760 	struct commit_queue_entry *pentry;
1761 	int nscrolled = 0, ncommits_needed;
1762 
1763 	if (s->last_displayed_entry == NULL)
1764 		return NULL;
1765 
1766 	ncommits_needed = (s->last_displayed_entry)->idx + 1 + maxscroll;
1767 	if (s->commits.ncommits < ncommits_needed &&
1768 	    !s->thread_args.log_complete) {
1769 		/*
1770 		 * Ask the log thread for required amount of commits.
1771 		 */
1772 		s->thread_args.commits_needed += maxscroll;
1773 		err = trigger_log_thread(view, 1);
1774 		if (err)
1775 			return err;
1776 	}
1777 
1778 	do {
1779 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
1780 		if (pentry == NULL)
1781 			break;
1782 
1783 		s->last_displayed_entry = pentry;
1784 
1785 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
1786 		if (pentry == NULL)
1787 			break;
1788 		s->first_displayed_entry = pentry;
1789 	} while (++nscrolled < maxscroll);
1790 
1791 	return err;
1792 }
1793 
1794 static const struct got_error *
1795 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1796     struct got_commit_object *commit, struct got_object_id *commit_id,
1797     struct tog_view *log_view, struct got_repository *repo)
1798 {
1799 	const struct got_error *err;
1800 	struct got_object_qid *parent_id;
1801 	struct tog_view *diff_view;
1802 
1803 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1804 	if (diff_view == NULL)
1805 		return got_error_from_errno("view_open");
1806 
1807 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1808 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1809 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
1810 	if (err == NULL)
1811 		*new_view = diff_view;
1812 	return err;
1813 }
1814 
1815 static const struct got_error *
1816 tree_view_visit_subtree(struct got_tree_object *subtree,
1817     struct tog_tree_view_state *s)
1818 {
1819 	struct tog_parent_tree *parent;
1820 
1821 	parent = calloc(1, sizeof(*parent));
1822 	if (parent == NULL)
1823 		return got_error_from_errno("calloc");
1824 
1825 	parent->tree = s->tree;
1826 	parent->first_displayed_entry = s->first_displayed_entry;
1827 	parent->selected_entry = s->selected_entry;
1828 	parent->selected = s->selected;
1829 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1830 	s->tree = subtree;
1831 	s->selected = 0;
1832 	s->first_displayed_entry = NULL;
1833 	return NULL;
1834 }
1835 
1836 static const struct got_error *
1837 tree_view_walk_path(struct tog_tree_view_state *s,
1838     struct got_object_id *commit_id,
1839     const char *path, struct got_repository *repo)
1840 {
1841 	const struct got_error *err = NULL;
1842 	struct got_tree_object *tree = NULL;
1843 	const char *p;
1844 	char *slash, *subpath = NULL;
1845 
1846 	/* Walk the path and open corresponding tree objects. */
1847 	p = path;
1848 	while (*p) {
1849 		struct got_tree_entry *te;
1850 		struct got_object_id *tree_id;
1851 		char *te_name;
1852 
1853 		while (p[0] == '/')
1854 			p++;
1855 
1856 		/* Ensure the correct subtree entry is selected. */
1857 		slash = strchr(p, '/');
1858 		if (slash == NULL)
1859 			te_name = strdup(p);
1860 		else
1861 			te_name = strndup(p, slash - p);
1862 		if (te_name == NULL) {
1863 			err = got_error_from_errno("strndup");
1864 			break;
1865 		}
1866 		te = got_object_tree_find_entry(s->tree, te_name);
1867 		if (te == NULL) {
1868 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
1869 			free(te_name);
1870 			break;
1871 		}
1872 		free(te_name);
1873 		s->first_displayed_entry = s->selected_entry = te;
1874 
1875 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
1876 			break; /* jump to this file's entry */
1877 
1878 		slash = strchr(p, '/');
1879 		if (slash)
1880 			subpath = strndup(path, slash - path);
1881 		else
1882 			subpath = strdup(path);
1883 		if (subpath == NULL) {
1884 			err = got_error_from_errno("strdup");
1885 			break;
1886 		}
1887 
1888 		err = got_object_id_by_path(&tree_id, repo, commit_id,
1889 		    subpath);
1890 		if (err)
1891 			break;
1892 
1893 		err = got_object_open_as_tree(&tree, repo, tree_id);
1894 		free(tree_id);
1895 		if (err)
1896 			break;
1897 
1898 		err = tree_view_visit_subtree(tree, s);
1899 		if (err) {
1900 			got_object_tree_close(tree);
1901 			break;
1902 		}
1903 		if (slash == NULL)
1904 			break;
1905 		free(subpath);
1906 		subpath = NULL;
1907 		p = slash;
1908 	}
1909 
1910 	free(subpath);
1911 	return err;
1912 }
1913 
1914 static const struct got_error *
1915 browse_commit_tree(struct tog_view **new_view, int begin_x,
1916     struct commit_queue_entry *entry, const char *path,
1917     struct got_repository *repo)
1918 {
1919 	const struct got_error *err = NULL;
1920 	struct got_tree_object *tree;
1921 	struct tog_tree_view_state *s;
1922 	struct tog_view *tree_view;
1923 
1924 	err = got_object_open_as_tree(&tree, repo,
1925 	    got_object_commit_get_tree_id(entry->commit));
1926 	if (err)
1927 		return err;
1928 
1929 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1930 	if (tree_view == NULL)
1931 		return got_error_from_errno("view_open");
1932 
1933 	err = open_tree_view(tree_view, tree, entry->id, repo);
1934 	if (err) {
1935 		got_object_tree_close(tree);
1936 		return err;
1937 	}
1938 	s = &tree_view->state.tree;
1939 
1940 	*new_view = tree_view;
1941 
1942 	if (got_path_is_root_dir(path))
1943 		return NULL;
1944 
1945 	return tree_view_walk_path(s, entry->id, path, repo);
1946 }
1947 
1948 static const struct got_error *
1949 block_signals_used_by_main_thread(void)
1950 {
1951 	sigset_t sigset;
1952 	int errcode;
1953 
1954 	if (sigemptyset(&sigset) == -1)
1955 		return got_error_from_errno("sigemptyset");
1956 
1957 	/* tog handles SIGWINCH and SIGCONT */
1958 	if (sigaddset(&sigset, SIGWINCH) == -1)
1959 		return got_error_from_errno("sigaddset");
1960 	if (sigaddset(&sigset, SIGCONT) == -1)
1961 		return got_error_from_errno("sigaddset");
1962 
1963 	/* ncurses handles SIGTSTP */
1964 	if (sigaddset(&sigset, SIGTSTP) == -1)
1965 		return got_error_from_errno("sigaddset");
1966 
1967 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
1968 	if (errcode)
1969 		return got_error_set_errno(errcode, "pthread_sigmask");
1970 
1971 	return NULL;
1972 }
1973 
1974 static void *
1975 log_thread(void *arg)
1976 {
1977 	const struct got_error *err = NULL;
1978 	int errcode = 0;
1979 	struct tog_log_thread_args *a = arg;
1980 	int done = 0;
1981 
1982 	err = block_signals_used_by_main_thread();
1983 	if (err)
1984 		return (void *)err;
1985 
1986 	while (!done && !err && !tog_sigpipe_received) {
1987 		err = queue_commits(a->graph, a->commits, 1, a->repo,
1988 		    a->in_repo_path, a->searching, a->search_next_done,
1989 		    a->regex);
1990 		if (err) {
1991 			if (err->code != GOT_ERR_ITER_COMPLETED)
1992 				return (void *)err;
1993 			err = NULL;
1994 			done = 1;
1995 		} else if (a->commits_needed > 0)
1996 			a->commits_needed--;
1997 
1998 		errcode = pthread_mutex_lock(&tog_mutex);
1999 		if (errcode) {
2000 			err = got_error_set_errno(errcode,
2001 			    "pthread_mutex_lock");
2002 			break;
2003 		} else if (*a->quit)
2004 			done = 1;
2005 		else if (*a->first_displayed_entry == NULL) {
2006 			*a->first_displayed_entry =
2007 			    TAILQ_FIRST(&a->commits->head);
2008 			*a->selected_entry = *a->first_displayed_entry;
2009 		}
2010 
2011 		errcode = pthread_cond_signal(&a->commit_loaded);
2012 		if (errcode) {
2013 			err = got_error_set_errno(errcode,
2014 			    "pthread_cond_signal");
2015 			pthread_mutex_unlock(&tog_mutex);
2016 			break;
2017 		}
2018 
2019 		if (done)
2020 			a->commits_needed = 0;
2021 		else {
2022 			if (a->commits_needed == 0) {
2023 				errcode = pthread_cond_wait(&a->need_commits,
2024 				    &tog_mutex);
2025 				if (errcode)
2026 					err = got_error_set_errno(errcode,
2027 					    "pthread_cond_wait");
2028 			}
2029 		}
2030 
2031 		errcode = pthread_mutex_unlock(&tog_mutex);
2032 		if (errcode && err == NULL)
2033 			err = got_error_set_errno(errcode,
2034 			    "pthread_mutex_unlock");
2035 	}
2036 	a->log_complete = 1;
2037 	return (void *)err;
2038 }
2039 
2040 static const struct got_error *
2041 stop_log_thread(struct tog_log_view_state *s)
2042 {
2043 	const struct got_error *err = NULL;
2044 	int errcode;
2045 
2046 	if (s->thread) {
2047 		s->quit = 1;
2048 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2049 		if (errcode)
2050 			return got_error_set_errno(errcode,
2051 			    "pthread_cond_signal");
2052 		errcode = pthread_mutex_unlock(&tog_mutex);
2053 		if (errcode)
2054 			return got_error_set_errno(errcode,
2055 			    "pthread_mutex_unlock");
2056 		errcode = pthread_join(s->thread, (void **)&err);
2057 		if (errcode)
2058 			return got_error_set_errno(errcode, "pthread_join");
2059 		errcode = pthread_mutex_lock(&tog_mutex);
2060 		if (errcode)
2061 			return got_error_set_errno(errcode,
2062 			    "pthread_mutex_lock");
2063 		s->thread = NULL;
2064 	}
2065 
2066 	if (s->thread_args.repo) {
2067 		got_repo_close(s->thread_args.repo);
2068 		s->thread_args.repo = NULL;
2069 	}
2070 
2071 	if (s->thread_args.graph) {
2072 		got_commit_graph_close(s->thread_args.graph);
2073 		s->thread_args.graph = NULL;
2074 	}
2075 
2076 	return err;
2077 }
2078 
2079 static const struct got_error *
2080 close_log_view(struct tog_view *view)
2081 {
2082 	const struct got_error *err = NULL;
2083 	struct tog_log_view_state *s = &view->state.log;
2084 	int errcode;
2085 
2086 	err = stop_log_thread(s);
2087 
2088 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2089 	if (errcode && err == NULL)
2090 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2091 
2092 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2093 	if (errcode && err == NULL)
2094 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2095 
2096 	free_commits(&s->commits);
2097 	free(s->in_repo_path);
2098 	s->in_repo_path = NULL;
2099 	free(s->start_id);
2100 	s->start_id = NULL;
2101 	got_ref_list_free(&s->refs);
2102 	return err;
2103 }
2104 
2105 static const struct got_error *
2106 search_start_log_view(struct tog_view *view)
2107 {
2108 	struct tog_log_view_state *s = &view->state.log;
2109 
2110 	s->matched_entry = NULL;
2111 	s->search_entry = NULL;
2112 	return NULL;
2113 }
2114 
2115 static const struct got_error *
2116 search_next_log_view(struct tog_view *view)
2117 {
2118 	const struct got_error *err = NULL;
2119 	struct tog_log_view_state *s = &view->state.log;
2120 	struct commit_queue_entry *entry;
2121 
2122 	/* Display progress update in log view. */
2123 	show_log_view(view);
2124 	update_panels();
2125 	doupdate();
2126 
2127 	if (s->search_entry) {
2128 		int errcode, ch;
2129 		errcode = pthread_mutex_unlock(&tog_mutex);
2130 		if (errcode)
2131 			return got_error_set_errno(errcode,
2132 			    "pthread_mutex_unlock");
2133 		ch = wgetch(view->window);
2134 		errcode = pthread_mutex_lock(&tog_mutex);
2135 		if (errcode)
2136 			return got_error_set_errno(errcode,
2137 			    "pthread_mutex_lock");
2138 		if (ch == KEY_BACKSPACE) {
2139 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2140 			return NULL;
2141 		}
2142 		if (view->searching == TOG_SEARCH_FORWARD)
2143 			entry = TAILQ_NEXT(s->search_entry, entry);
2144 		else
2145 			entry = TAILQ_PREV(s->search_entry,
2146 			    commit_queue_head, entry);
2147 	} else if (s->matched_entry) {
2148 		if (view->searching == TOG_SEARCH_FORWARD)
2149 			entry = TAILQ_NEXT(s->matched_entry, entry);
2150 		else
2151 			entry = TAILQ_PREV(s->matched_entry,
2152 			    commit_queue_head, entry);
2153 	} else {
2154 		if (view->searching == TOG_SEARCH_FORWARD)
2155 			entry = TAILQ_FIRST(&s->commits.head);
2156 		else
2157 			entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
2158 	}
2159 
2160 	while (1) {
2161 		int have_match = 0;
2162 
2163 		if (entry == NULL) {
2164 			if (s->thread_args.log_complete ||
2165 			    view->searching == TOG_SEARCH_BACKWARD) {
2166 				view->search_next_done =
2167 				    (s->matched_entry == NULL ?
2168 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2169 				s->search_entry = NULL;
2170 				return NULL;
2171 			}
2172 			/*
2173 			 * Poke the log thread for more commits and return,
2174 			 * allowing the main loop to make progress. Search
2175 			 * will resume at s->search_entry once we come back.
2176 			 */
2177 			s->thread_args.commits_needed++;
2178 			return trigger_log_thread(view, 0);
2179 		}
2180 
2181 		err = match_commit(&have_match, entry->id, entry->commit,
2182 		    &view->regex);
2183 		if (err)
2184 			break;
2185 		if (have_match) {
2186 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2187 			s->matched_entry = entry;
2188 			break;
2189 		}
2190 
2191 		s->search_entry = entry;
2192 		if (view->searching == TOG_SEARCH_FORWARD)
2193 			entry = TAILQ_NEXT(entry, entry);
2194 		else
2195 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2196 	}
2197 
2198 	if (s->matched_entry) {
2199 		int cur = s->selected_entry->idx;
2200 		while (cur < s->matched_entry->idx) {
2201 			err = input_log_view(NULL, NULL, NULL, view, KEY_DOWN);
2202 			if (err)
2203 				return err;
2204 			cur++;
2205 		}
2206 		while (cur > s->matched_entry->idx) {
2207 			err = input_log_view(NULL, NULL, NULL, view, KEY_UP);
2208 			if (err)
2209 				return err;
2210 			cur--;
2211 		}
2212 	}
2213 
2214 	s->search_entry = NULL;
2215 
2216 	return NULL;
2217 }
2218 
2219 static const struct got_error *
2220 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2221     struct got_repository *repo, const char *head_ref_name,
2222     const char *in_repo_path, int log_branches)
2223 {
2224 	const struct got_error *err = NULL;
2225 	struct tog_log_view_state *s = &view->state.log;
2226 	struct got_repository *thread_repo = NULL;
2227 	struct got_commit_graph *thread_graph = NULL;
2228 	int errcode;
2229 
2230 	SIMPLEQ_INIT(&s->refs);
2231 
2232 	if (in_repo_path != s->in_repo_path) {
2233 		free(s->in_repo_path);
2234 		s->in_repo_path = strdup(in_repo_path);
2235 		if (s->in_repo_path == NULL)
2236 			return got_error_from_errno("strdup");
2237 	}
2238 
2239 	/* The commit queue only contains commits being displayed. */
2240 	TAILQ_INIT(&s->commits.head);
2241 	s->commits.ncommits = 0;
2242 
2243 	err = got_ref_list(&s->refs, repo, NULL, got_ref_cmp_by_name, NULL);
2244 	if (err)
2245 		goto done;
2246 
2247 	s->repo = repo;
2248 	s->head_ref_name = head_ref_name;
2249 	s->start_id = got_object_id_dup(start_id);
2250 	if (s->start_id == NULL) {
2251 		err = got_error_from_errno("got_object_id_dup");
2252 		goto done;
2253 	}
2254 	s->log_branches = log_branches;
2255 
2256 	SIMPLEQ_INIT(&s->colors);
2257 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2258 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2259 		    get_color_value("TOG_COLOR_COMMIT"));
2260 		if (err)
2261 			goto done;
2262 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2263 		    get_color_value("TOG_COLOR_AUTHOR"));
2264 		if (err) {
2265 			free_colors(&s->colors);
2266 			goto done;
2267 		}
2268 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2269 		    get_color_value("TOG_COLOR_DATE"));
2270 		if (err) {
2271 			free_colors(&s->colors);
2272 			goto done;
2273 		}
2274 	}
2275 
2276 	view->show = show_log_view;
2277 	view->input = input_log_view;
2278 	view->close = close_log_view;
2279 	view->search_start = search_start_log_view;
2280 	view->search_next = search_next_log_view;
2281 
2282 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL);
2283 	if (err)
2284 		goto done;
2285 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
2286 	    !s->log_branches);
2287 	if (err)
2288 		goto done;
2289 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
2290 	    s->repo, NULL, NULL);
2291 	if (err)
2292 		goto done;
2293 
2294 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
2295 	if (errcode) {
2296 		err = got_error_set_errno(errcode, "pthread_cond_init");
2297 		goto done;
2298 	}
2299 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
2300 	if (errcode) {
2301 		err = got_error_set_errno(errcode, "pthread_cond_init");
2302 		goto done;
2303 	}
2304 
2305 	s->thread_args.commits_needed = view->nlines;
2306 	s->thread_args.graph = thread_graph;
2307 	s->thread_args.commits = &s->commits;
2308 	s->thread_args.in_repo_path = s->in_repo_path;
2309 	s->thread_args.start_id = s->start_id;
2310 	s->thread_args.repo = thread_repo;
2311 	s->thread_args.log_complete = 0;
2312 	s->thread_args.quit = &s->quit;
2313 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
2314 	s->thread_args.selected_entry = &s->selected_entry;
2315 	s->thread_args.searching = &view->searching;
2316 	s->thread_args.search_next_done = &view->search_next_done;
2317 	s->thread_args.regex = &view->regex;
2318 done:
2319 	if (err)
2320 		close_log_view(view);
2321 	return err;
2322 }
2323 
2324 static const struct got_error *
2325 show_log_view(struct tog_view *view)
2326 {
2327 	const struct got_error *err;
2328 	struct tog_log_view_state *s = &view->state.log;
2329 
2330 	if (s->thread == NULL) {
2331 		int errcode = pthread_create(&s->thread, NULL, log_thread,
2332 		    &s->thread_args);
2333 		if (errcode)
2334 			return got_error_set_errno(errcode, "pthread_create");
2335 		if (s->thread_args.commits_needed > 0) {
2336 			err = trigger_log_thread(view, 1);
2337 			if (err)
2338 				return err;
2339 		}
2340 	}
2341 
2342 	return draw_commits(view, &s->last_displayed_entry,
2343 	    &s->selected_entry, s->first_displayed_entry,
2344 	    &s->commits, s->selected, view->nlines, &s->refs,
2345 	    s->in_repo_path, s->thread_args.commits_needed, &s->colors);
2346 }
2347 
2348 static const struct got_error *
2349 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
2350     struct tog_view **focus_view, struct tog_view *view, int ch)
2351 {
2352 	const struct got_error *err = NULL;
2353 	struct tog_log_view_state *s = &view->state.log;
2354 	char *parent_path, *in_repo_path = NULL;
2355 	struct tog_view *diff_view = NULL, *tree_view = NULL, *lv = NULL;
2356 	struct tog_view *ref_view = NULL;
2357 	int begin_x = 0;
2358 	struct got_object_id *start_id;
2359 
2360 	switch (ch) {
2361 	case 'q':
2362 		s->quit = 1;
2363 		break;
2364 	case 'k':
2365 	case KEY_UP:
2366 	case '<':
2367 	case ',':
2368 		if (s->first_displayed_entry == NULL)
2369 			break;
2370 		if (s->selected > 0)
2371 			s->selected--;
2372 		else
2373 			log_scroll_up(view, 1);
2374 		break;
2375 	case KEY_PPAGE:
2376 	case CTRL('b'):
2377 		if (s->first_displayed_entry == NULL)
2378 			break;
2379 		if (TAILQ_FIRST(&s->commits.head) ==
2380 		    s->first_displayed_entry) {
2381 			s->selected = 0;
2382 			break;
2383 		}
2384 		log_scroll_up(view, view->nlines - 1);
2385 		break;
2386 	case 'j':
2387 	case KEY_DOWN:
2388 	case '>':
2389 	case '.':
2390 		if (s->first_displayed_entry == NULL)
2391 			break;
2392 		if (s->selected < MIN(view->nlines - 2,
2393 		    s->commits.ncommits - 1)) {
2394 			s->selected++;
2395 			break;
2396 		}
2397 		err = log_scroll_down(view, 1);
2398 		break;
2399 	case KEY_NPAGE:
2400 	case CTRL('f'): {
2401 		struct commit_queue_entry *first;
2402 		first = s->first_displayed_entry;
2403 		if (first == NULL)
2404 			break;
2405 		err = log_scroll_down(view, view->nlines - 1);
2406 		if (err)
2407 			break;
2408 		if (first == s->first_displayed_entry &&
2409 		    s->selected < MIN(view->nlines - 2,
2410 		    s->commits.ncommits - 1)) {
2411 			/* can't scroll further down */
2412 			s->selected = MIN(view->nlines - 2,
2413 			    s->commits.ncommits - 1);
2414 		}
2415 		err = NULL;
2416 		break;
2417 	}
2418 	case KEY_RESIZE:
2419 		if (s->selected > view->nlines - 2)
2420 			s->selected = view->nlines - 2;
2421 		if (s->selected > s->commits.ncommits - 1)
2422 			s->selected = s->commits.ncommits - 1;
2423 		break;
2424 	case KEY_ENTER:
2425 	case ' ':
2426 	case '\r':
2427 		if (s->selected_entry == NULL)
2428 			break;
2429 		if (view_is_parent_view(view))
2430 			begin_x = view_split_begin_x(view->begin_x);
2431 		err = open_diff_view_for_commit(&diff_view, begin_x,
2432 		    s->selected_entry->commit, s->selected_entry->id,
2433 		    view, s->repo);
2434 		if (err)
2435 			break;
2436 		if (view_is_parent_view(view)) {
2437 			err = view_close_child(view);
2438 			if (err)
2439 				return err;
2440 			err = view_set_child(view, diff_view);
2441 			if (err) {
2442 				view_close(diff_view);
2443 				break;
2444 			}
2445 			*focus_view = diff_view;
2446 			view->child_focussed = 1;
2447 		} else
2448 			*new_view = diff_view;
2449 		break;
2450 	case 't':
2451 		if (s->selected_entry == NULL)
2452 			break;
2453 		if (view_is_parent_view(view))
2454 			begin_x = view_split_begin_x(view->begin_x);
2455 		err = browse_commit_tree(&tree_view, begin_x,
2456 		    s->selected_entry, s->in_repo_path, s->repo);
2457 		if (err)
2458 			break;
2459 		if (view_is_parent_view(view)) {
2460 			err = view_close_child(view);
2461 			if (err)
2462 				return err;
2463 			err = view_set_child(view, tree_view);
2464 			if (err) {
2465 				view_close(tree_view);
2466 				break;
2467 			}
2468 			*focus_view = tree_view;
2469 			view->child_focussed = 1;
2470 		} else
2471 			*new_view = tree_view;
2472 		break;
2473 	case KEY_BACKSPACE:
2474 		if (got_path_cmp(s->in_repo_path, "/",
2475 		    strlen(s->in_repo_path), 1) == 0)
2476 			break;
2477 		err = got_path_dirname(&parent_path, s->in_repo_path);
2478 		if (err)
2479 			return err;
2480 		err = stop_log_thread(s);
2481 		if (err) {
2482 			free(parent_path);
2483 			return err;
2484 		}
2485 		lv = view_open(view->nlines, view->ncols,
2486 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2487 		if (lv == NULL) {
2488 			free(parent_path);
2489 			return got_error_from_errno("view_open");
2490 		}
2491 		err = open_log_view(lv, s->start_id, s->repo, s->head_ref_name,
2492 		    parent_path, s->log_branches);
2493 		free(parent_path);
2494 		if (err)
2495 			return err;;
2496 		if (view_is_parent_view(view))
2497 			*new_view = lv;
2498 		else {
2499 			view_set_child(view->parent, lv);
2500 			*focus_view = lv;
2501 		}
2502 		break;
2503 	case CTRL('l'):
2504 		err = stop_log_thread(s);
2505 		if (err)
2506 			return err;
2507 		lv = view_open(view->nlines, view->ncols,
2508 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2509 		if (lv == NULL)
2510 			return got_error_from_errno("view_open");
2511 		err = got_repo_match_object_id(&start_id, NULL,
2512 		    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
2513 		    GOT_OBJ_TYPE_COMMIT, 1, s->repo);
2514 		if (err) {
2515 			view_close(lv);
2516 			return err;
2517 		}
2518 		in_repo_path = strdup(s->in_repo_path);
2519 		if (in_repo_path == NULL) {
2520 			free(start_id);
2521 			view_close(lv);
2522 			return got_error_from_errno("strdup");
2523 		}
2524 		err = open_log_view(lv, start_id, s->repo, s->head_ref_name,
2525 		    in_repo_path, s->log_branches);
2526 		if (err) {
2527 			free(start_id);
2528 			view_close(lv);
2529 			return err;;
2530 		}
2531 		*dead_view = view;
2532 		*new_view = lv;
2533 		break;
2534 	case 'B':
2535 		s->log_branches = !s->log_branches;
2536 		err = stop_log_thread(s);
2537 		if (err)
2538 			return err;
2539 		lv = view_open(view->nlines, view->ncols,
2540 		    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2541 		if (lv == NULL)
2542 			return got_error_from_errno("view_open");
2543 		err = open_log_view(lv, s->start_id, s->repo,
2544 		    s->head_ref_name, s->in_repo_path, s->log_branches);
2545 		if (err) {
2546 			view_close(lv);
2547 			return err;;
2548 		}
2549 		*dead_view = view;
2550 		*new_view = lv;
2551 		break;
2552 	case 'r':
2553 		if (view_is_parent_view(view))
2554 			begin_x = view_split_begin_x(view->begin_x);
2555 		ref_view = view_open(view->nlines, view->ncols,
2556 		    view->begin_y, begin_x, TOG_VIEW_REF);
2557 		if (ref_view == NULL)
2558 			return got_error_from_errno("view_open");
2559 		err = open_ref_view(ref_view, s->repo);
2560 		if (err) {
2561 			view_close(ref_view);
2562 			return err;
2563 		}
2564 		if (view_is_parent_view(view)) {
2565 			err = view_close_child(view);
2566 			if (err)
2567 				return err;
2568 			err = view_set_child(view, ref_view);
2569 			if (err) {
2570 				view_close(ref_view);
2571 				break;
2572 			}
2573 			*focus_view = ref_view;
2574 			view->child_focussed = 1;
2575 		} else
2576 			*new_view = ref_view;
2577 		break;
2578 	default:
2579 		break;
2580 	}
2581 
2582 	return err;
2583 }
2584 
2585 static const struct got_error *
2586 apply_unveil(const char *repo_path, const char *worktree_path)
2587 {
2588 	const struct got_error *error;
2589 
2590 #ifdef PROFILE
2591 	if (unveil("gmon.out", "rwc") != 0)
2592 		return got_error_from_errno2("unveil", "gmon.out");
2593 #endif
2594 	if (repo_path && unveil(repo_path, "r") != 0)
2595 		return got_error_from_errno2("unveil", repo_path);
2596 
2597 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2598 		return got_error_from_errno2("unveil", worktree_path);
2599 
2600 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
2601 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
2602 
2603 	error = got_privsep_unveil_exec_helpers();
2604 	if (error != NULL)
2605 		return error;
2606 
2607 	if (unveil(NULL, NULL) != 0)
2608 		return got_error_from_errno("unveil");
2609 
2610 	return NULL;
2611 }
2612 
2613 static void
2614 init_curses(void)
2615 {
2616 	initscr();
2617 	cbreak();
2618 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2619 	noecho();
2620 	nonl();
2621 	intrflush(stdscr, FALSE);
2622 	keypad(stdscr, TRUE);
2623 	curs_set(0);
2624 	if (getenv("TOG_COLORS") != NULL) {
2625 		start_color();
2626 		use_default_colors();
2627 	}
2628 	signal(SIGWINCH, tog_sigwinch);
2629 	signal(SIGPIPE, tog_sigpipe);
2630 	signal(SIGCONT, tog_sigcont);
2631 }
2632 
2633 static const struct got_error *
2634 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
2635     struct got_repository *repo, struct got_worktree *worktree)
2636 {
2637 	const struct got_error *err = NULL;
2638 
2639 	if (argc == 0) {
2640 		*in_repo_path = strdup("/");
2641 		if (*in_repo_path == NULL)
2642 			return got_error_from_errno("strdup");
2643 		return NULL;
2644 	}
2645 
2646 	if (worktree) {
2647 		const char *prefix = got_worktree_get_path_prefix(worktree);
2648 		char *p;
2649 
2650 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
2651 		if (err)
2652 			return err;
2653 		if (asprintf(in_repo_path, "%s%s%s", prefix,
2654 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
2655 		    p) == -1) {
2656 			err = got_error_from_errno("asprintf");
2657 			*in_repo_path = NULL;
2658 		}
2659 		free(p);
2660 	} else
2661 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
2662 
2663 	return err;
2664 }
2665 
2666 static const struct got_error *
2667 cmd_log(int argc, char *argv[])
2668 {
2669 	const struct got_error *error;
2670 	struct got_repository *repo = NULL;
2671 	struct got_worktree *worktree = NULL;
2672 	struct got_object_id *start_id = NULL;
2673 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
2674 	char *start_commit = NULL, *head_ref_name = NULL;
2675 	int ch, log_branches = 0;
2676 	struct tog_view *view;
2677 
2678 #ifndef PROFILE
2679 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2680 	    NULL) == -1)
2681 		err(1, "pledge");
2682 #endif
2683 
2684 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
2685 		switch (ch) {
2686 		case 'b':
2687 			log_branches = 1;
2688 			break;
2689 		case 'c':
2690 			start_commit = optarg;
2691 			break;
2692 		case 'r':
2693 			repo_path = realpath(optarg, NULL);
2694 			if (repo_path == NULL)
2695 				return got_error_from_errno2("realpath",
2696 				    optarg);
2697 			break;
2698 		default:
2699 			usage_log();
2700 			/* NOTREACHED */
2701 		}
2702 	}
2703 
2704 	argc -= optind;
2705 	argv += optind;
2706 
2707 	if (argc > 1)
2708 		usage_log();
2709 
2710 	cwd = getcwd(NULL, 0);
2711 	if (cwd == NULL)
2712 		return got_error_from_errno("getcwd");
2713 
2714 	error = got_worktree_open(&worktree, cwd);
2715 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
2716 		goto done;
2717 
2718 	if (repo_path == NULL) {
2719 		if (worktree)
2720 			repo_path =
2721 			    strdup(got_worktree_get_repo_path(worktree));
2722 		else
2723 			repo_path = strdup(cwd);
2724 	}
2725 	if (repo_path == NULL) {
2726 		error = got_error_from_errno("strdup");
2727 		goto done;
2728 	}
2729 
2730 	error = got_repo_open(&repo, repo_path, NULL);
2731 	if (error != NULL)
2732 		goto done;
2733 
2734 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
2735 	    repo, worktree);
2736 	if (error)
2737 		goto done;
2738 
2739 	init_curses();
2740 
2741 	error = apply_unveil(got_repo_get_path(repo),
2742 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2743 	if (error)
2744 		goto done;
2745 
2746 	if (start_commit == NULL)
2747 		error = got_repo_match_object_id(&start_id, NULL, worktree ?
2748 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
2749 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2750 	else
2751 		error = got_repo_match_object_id(&start_id, NULL, start_commit,
2752 		    GOT_OBJ_TYPE_COMMIT, 1, repo);
2753 	if (error != NULL)
2754 		goto done;
2755 
2756 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2757 	if (view == NULL) {
2758 		error = got_error_from_errno("view_open");
2759 		goto done;
2760 	}
2761 	if (worktree) {
2762 		head_ref_name = strdup(
2763 		    got_worktree_get_head_ref_name(worktree));
2764 		if (head_ref_name == NULL) {
2765 			error = got_error_from_errno("strdup");
2766 			goto done;
2767 		}
2768 	}
2769 	error = open_log_view(view, start_id, repo, head_ref_name,
2770 	    in_repo_path, log_branches);
2771 	if (error)
2772 		goto done;
2773 	if (worktree) {
2774 		/* Release work tree lock. */
2775 		got_worktree_close(worktree);
2776 		worktree = NULL;
2777 	}
2778 	error = view_loop(view);
2779 done:
2780 	free(in_repo_path);
2781 	free(repo_path);
2782 	free(cwd);
2783 	free(start_id);
2784 	free(head_ref_name);
2785 	if (repo)
2786 		got_repo_close(repo);
2787 	if (worktree)
2788 		got_worktree_close(worktree);
2789 	return error;
2790 }
2791 
2792 __dead static void
2793 usage_diff(void)
2794 {
2795 	endwin();
2796 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
2797 	    "[-w] object1 object2\n", getprogname());
2798 	exit(1);
2799 }
2800 
2801 static char *
2802 parse_next_line(FILE *f, size_t *len)
2803 {
2804 	char *line;
2805 	size_t linelen;
2806 	size_t lineno;
2807 	const char delim[3] = { '\0', '\0', '\0'};
2808 
2809 	line = fparseln(f, &linelen, &lineno, delim, 0);
2810 	if (len)
2811 		*len = linelen;
2812 	return line;
2813 }
2814 
2815 static int
2816 match_line(const char *line, regex_t *regex, size_t nmatch,
2817     regmatch_t *regmatch)
2818 {
2819 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
2820 }
2821 
2822 struct tog_color *
2823 match_color(struct tog_colors *colors, const char *line)
2824 {
2825 	struct tog_color *tc = NULL;
2826 
2827 	SIMPLEQ_FOREACH(tc, colors, entry) {
2828 		if (match_line(line, &tc->regex, 0, NULL))
2829 			return tc;
2830 	}
2831 
2832 	return NULL;
2833 }
2834 
2835 static const struct got_error *
2836 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
2837     WINDOW *window, regmatch_t *regmatch)
2838 {
2839 	const struct got_error *err = NULL;
2840 	wchar_t *wline;
2841 	int width;
2842 	char *s;
2843 
2844 	*wtotal = 0;
2845 
2846 	s = strndup(line, regmatch->rm_so);
2847 	if (s == NULL)
2848 		return got_error_from_errno("strndup");
2849 
2850 	err = format_line(&wline, &width, s, wlimit, col_tab_align);
2851 	if (err) {
2852 		free(s);
2853 		return err;
2854 	}
2855 	waddwstr(window, wline);
2856 	free(wline);
2857 	free(s);
2858 	wlimit -= width;
2859 	*wtotal += width;
2860 
2861 	if (wlimit > 0) {
2862 		s = strndup(line + regmatch->rm_so,
2863 		    regmatch->rm_eo - regmatch->rm_so);
2864 		if (s == NULL) {
2865 			err = got_error_from_errno("strndup");
2866 			free(s);
2867 			return err;
2868 		}
2869 		err = format_line(&wline, &width, s, wlimit, col_tab_align);
2870 		if (err) {
2871 			free(s);
2872 			return err;
2873 		}
2874 		wattr_on(window, A_STANDOUT, NULL);
2875 		waddwstr(window, wline);
2876 		wattr_off(window, A_STANDOUT, NULL);
2877 		free(wline);
2878 		free(s);
2879 		wlimit -= width;
2880 		*wtotal += width;
2881 	}
2882 
2883 	if (wlimit > 0 && strlen(line) > regmatch->rm_eo) {
2884 		err = format_line(&wline, &width,
2885 		     line + regmatch->rm_eo, wlimit, col_tab_align);
2886 		if (err)
2887 			return err;
2888 		waddwstr(window, wline);
2889 		free(wline);
2890 		*wtotal += width;
2891 	}
2892 
2893 	return NULL;
2894 }
2895 
2896 static const struct got_error *
2897 draw_file(struct tog_view *view, FILE *f, int first_displayed_line, int nlines,
2898     off_t *line_offsets, int selected_line, int max_lines,
2899     int *last_displayed_line, int *eof, const char *header,
2900     struct tog_colors *colors, int matched_line, regmatch_t *regmatch)
2901 {
2902 	const struct got_error *err;
2903 	int nprinted = 0;
2904 	char *line;
2905 	struct tog_color *tc;
2906 	size_t len;
2907 	wchar_t *wline;
2908 	int width;
2909 	off_t line_offset;
2910 
2911 	line_offset = line_offsets[first_displayed_line - 1];
2912 	if (fseeko(f, line_offset, SEEK_SET) == -1)
2913 		return got_error_from_errno("fseek");
2914 
2915 	werase(view->window);
2916 
2917 	if (header) {
2918 		if (asprintf(&line, "[%d/%d] %s",
2919 		    first_displayed_line - 1 + selected_line, nlines,
2920 		    header) == -1)
2921 			return got_error_from_errno("asprintf");
2922 		err = format_line(&wline, &width, line, view->ncols, 0);
2923 		free(line);
2924 		if (err)
2925 			return err;
2926 
2927 		if (view_needs_focus_indication(view))
2928 			wstandout(view->window);
2929 		waddwstr(view->window, wline);
2930 		free(wline);
2931 		wline = NULL;
2932 		if (view_needs_focus_indication(view))
2933 			wstandend(view->window);
2934 		if (width <= view->ncols - 1)
2935 			waddch(view->window, '\n');
2936 
2937 		if (max_lines <= 1)
2938 			return NULL;
2939 		max_lines--;
2940 	}
2941 
2942 	*eof = 0;
2943 	while (max_lines > 0 && nprinted < max_lines) {
2944 		line = parse_next_line(f, &len);
2945 		if (line == NULL) {
2946 			*eof = 1;
2947 			break;
2948 		}
2949 
2950 		tc = match_color(colors, line);
2951 		if (tc)
2952 			wattr_on(view->window,
2953 			    COLOR_PAIR(tc->colorpair), NULL);
2954 		if (first_displayed_line + nprinted == matched_line &&
2955 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
2956 			err = add_matched_line(&width, line, view->ncols, 0,
2957 			    view->window, regmatch);
2958 			if (err) {
2959 				free(line);
2960 				return err;
2961 			}
2962 		} else {
2963 			err = format_line(&wline, &width, line, view->ncols, 0);
2964 			if (err) {
2965 				free(line);
2966 				return err;
2967 			}
2968 			waddwstr(view->window, wline);
2969 			free(wline);
2970 			wline = NULL;
2971 		}
2972 		if (tc)
2973 			wattr_off(view->window,
2974 			    COLOR_PAIR(tc->colorpair), NULL);
2975 		if (width <= view->ncols - 1)
2976 			waddch(view->window, '\n');
2977 		nprinted++;
2978 		free(line);
2979 	}
2980 	if (nprinted >= 1)
2981 		*last_displayed_line = first_displayed_line + (nprinted - 1);
2982 	else
2983 		*last_displayed_line = first_displayed_line;
2984 
2985 	view_vborder(view);
2986 
2987 	if (*eof) {
2988 		while (nprinted < view->nlines) {
2989 			waddch(view->window, '\n');
2990 			nprinted++;
2991 		}
2992 
2993 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols, 0);
2994 		if (err) {
2995 			return err;
2996 		}
2997 
2998 		wstandout(view->window);
2999 		waddwstr(view->window, wline);
3000 		free(wline);
3001 		wline = NULL;
3002 		wstandend(view->window);
3003 	}
3004 
3005 	return NULL;
3006 }
3007 
3008 static char *
3009 get_datestr(time_t *time, char *datebuf)
3010 {
3011 	struct tm mytm, *tm;
3012 	char *p, *s;
3013 
3014 	tm = gmtime_r(time, &mytm);
3015 	if (tm == NULL)
3016 		return NULL;
3017 	s = asctime_r(tm, datebuf);
3018 	if (s == NULL)
3019 		return NULL;
3020 	p = strchr(s, '\n');
3021 	if (p)
3022 		*p = '\0';
3023 	return s;
3024 }
3025 
3026 static const struct got_error *
3027 get_changed_paths(struct got_pathlist_head *paths,
3028     struct got_commit_object *commit, struct got_repository *repo)
3029 {
3030 	const struct got_error *err = NULL;
3031 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
3032 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
3033 	struct got_object_qid *qid;
3034 
3035 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
3036 	if (qid != NULL) {
3037 		struct got_commit_object *pcommit;
3038 		err = got_object_open_as_commit(&pcommit, repo,
3039 		    qid->id);
3040 		if (err)
3041 			return err;
3042 
3043 		tree_id1 = got_object_commit_get_tree_id(pcommit);
3044 		got_object_commit_close(pcommit);
3045 
3046 	}
3047 
3048 	if (tree_id1) {
3049 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
3050 		if (err)
3051 			goto done;
3052 	}
3053 
3054 	tree_id2 = got_object_commit_get_tree_id(commit);
3055 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
3056 	if (err)
3057 		goto done;
3058 
3059 	err = got_diff_tree(tree1, tree2, "", "", repo,
3060 	    got_diff_tree_collect_changed_paths, paths, 0);
3061 done:
3062 	if (tree1)
3063 		got_object_tree_close(tree1);
3064 	if (tree2)
3065 		got_object_tree_close(tree2);
3066 	return err;
3067 }
3068 
3069 static const struct got_error *
3070 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
3071 {
3072 	off_t *p;
3073 
3074 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
3075 	if (p == NULL)
3076 		return got_error_from_errno("reallocarray");
3077 	*line_offsets = p;
3078 	(*line_offsets)[*nlines] = off;
3079 	(*nlines)++;
3080 	return NULL;
3081 }
3082 
3083 static const struct got_error *
3084 write_commit_info(off_t **line_offsets, size_t *nlines,
3085     struct got_object_id *commit_id, struct got_reflist_head *refs,
3086     struct got_repository *repo, FILE *outfile)
3087 {
3088 	const struct got_error *err = NULL;
3089 	char datebuf[26], *datestr;
3090 	struct got_commit_object *commit;
3091 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
3092 	time_t committer_time;
3093 	const char *author, *committer;
3094 	char *refs_str = NULL;
3095 	struct got_pathlist_head changed_paths;
3096 	struct got_pathlist_entry *pe;
3097 	off_t outoff = 0;
3098 	int n;
3099 
3100 	TAILQ_INIT(&changed_paths);
3101 
3102 	if (refs) {
3103 		err = build_refs_str(&refs_str, refs, commit_id, repo);
3104 		if (err)
3105 			return err;
3106 	}
3107 
3108 	err = got_object_open_as_commit(&commit, repo, commit_id);
3109 	if (err)
3110 		return err;
3111 
3112 	err = got_object_id_str(&id_str, commit_id);
3113 	if (err) {
3114 		err = got_error_from_errno("got_object_id_str");
3115 		goto done;
3116 	}
3117 
3118 	err = add_line_offset(line_offsets, nlines, 0);
3119 	if (err)
3120 		goto done;
3121 
3122 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
3123 	    refs_str ? refs_str : "", refs_str ? ")" : "");
3124 	if (n < 0) {
3125 		err = got_error_from_errno("fprintf");
3126 		goto done;
3127 	}
3128 	outoff += n;
3129 	err = add_line_offset(line_offsets, nlines, outoff);
3130 	if (err)
3131 		goto done;
3132 
3133 	n = fprintf(outfile, "from: %s\n",
3134 	    got_object_commit_get_author(commit));
3135 	if (n < 0) {
3136 		err = got_error_from_errno("fprintf");
3137 		goto done;
3138 	}
3139 	outoff += n;
3140 	err = add_line_offset(line_offsets, nlines, outoff);
3141 	if (err)
3142 		goto done;
3143 
3144 	committer_time = got_object_commit_get_committer_time(commit);
3145 	datestr = get_datestr(&committer_time, datebuf);
3146 	if (datestr) {
3147 		n = fprintf(outfile, "date: %s UTC\n", datestr);
3148 		if (n < 0) {
3149 			err = got_error_from_errno("fprintf");
3150 			goto done;
3151 		}
3152 		outoff += n;
3153 		err = add_line_offset(line_offsets, nlines, outoff);
3154 		if (err)
3155 			goto done;
3156 	}
3157 	author = got_object_commit_get_author(commit);
3158 	committer = got_object_commit_get_committer(commit);
3159 	if (strcmp(author, committer) != 0) {
3160 		n = fprintf(outfile, "via: %s\n", committer);
3161 		if (n < 0) {
3162 			err = got_error_from_errno("fprintf");
3163 			goto done;
3164 		}
3165 		outoff += n;
3166 		err = add_line_offset(line_offsets, nlines, outoff);
3167 		if (err)
3168 			goto done;
3169 	}
3170 	err = got_object_commit_get_logmsg(&logmsg, commit);
3171 	if (err)
3172 		goto done;
3173 	s = logmsg;
3174 	while ((line = strsep(&s, "\n")) != NULL) {
3175 		n = fprintf(outfile, "%s\n", line);
3176 		if (n < 0) {
3177 			err = got_error_from_errno("fprintf");
3178 			goto done;
3179 		}
3180 		outoff += n;
3181 		err = add_line_offset(line_offsets, nlines, outoff);
3182 		if (err)
3183 			goto done;
3184 	}
3185 
3186 	err = get_changed_paths(&changed_paths, commit, repo);
3187 	if (err)
3188 		goto done;
3189 	TAILQ_FOREACH(pe, &changed_paths, entry) {
3190 		struct got_diff_changed_path *cp = pe->data;
3191 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
3192 		if (n < 0) {
3193 			err = got_error_from_errno("fprintf");
3194 			goto done;
3195 		}
3196 		outoff += n;
3197 		err = add_line_offset(line_offsets, nlines, outoff);
3198 		if (err)
3199 			goto done;
3200 		free((char *)pe->path);
3201 		free(pe->data);
3202 	}
3203 
3204 	fputc('\n', outfile);
3205 	outoff++;
3206 	err = add_line_offset(line_offsets, nlines, outoff);
3207 done:
3208 	got_pathlist_free(&changed_paths);
3209 	free(id_str);
3210 	free(logmsg);
3211 	free(refs_str);
3212 	got_object_commit_close(commit);
3213 	if (err) {
3214 		free(*line_offsets);
3215 		*line_offsets = NULL;
3216 		*nlines = 0;
3217 	}
3218 	return err;
3219 }
3220 
3221 static const struct got_error *
3222 create_diff(struct tog_diff_view_state *s)
3223 {
3224 	const struct got_error *err = NULL;
3225 	FILE *f = NULL;
3226 	int obj_type;
3227 
3228 	free(s->line_offsets);
3229 	s->line_offsets = malloc(sizeof(off_t));
3230 	if (s->line_offsets == NULL)
3231 		return got_error_from_errno("malloc");
3232 	s->nlines = 0;
3233 
3234 	f = got_opentemp();
3235 	if (f == NULL) {
3236 		err = got_error_from_errno("got_opentemp");
3237 		goto done;
3238 	}
3239 	if (s->f && fclose(s->f) != 0) {
3240 		err = got_error_from_errno("fclose");
3241 		goto done;
3242 	}
3243 	s->f = f;
3244 
3245 	if (s->id1)
3246 		err = got_object_get_type(&obj_type, s->repo, s->id1);
3247 	else
3248 		err = got_object_get_type(&obj_type, s->repo, s->id2);
3249 	if (err)
3250 		goto done;
3251 
3252 	switch (obj_type) {
3253 	case GOT_OBJ_TYPE_BLOB:
3254 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
3255 		    s->id1, s->id2, s->label1, s->label2, s->diff_context,
3256 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3257 		break;
3258 	case GOT_OBJ_TYPE_TREE:
3259 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
3260 		    s->id1, s->id2, "", "", s->diff_context,
3261 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
3262 		break;
3263 	case GOT_OBJ_TYPE_COMMIT: {
3264 		const struct got_object_id_queue *parent_ids;
3265 		struct got_object_qid *pid;
3266 		struct got_commit_object *commit2;
3267 
3268 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
3269 		if (err)
3270 			goto done;
3271 		/* Show commit info if we're diffing to a parent/root commit. */
3272 		if (s->id1 == NULL) {
3273 			err = write_commit_info(&s->line_offsets, &s->nlines,
3274 			    s->id2, &s->refs, s->repo, s->f);
3275 			if (err)
3276 				goto done;
3277 		} else {
3278 			parent_ids = got_object_commit_get_parent_ids(commit2);
3279 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
3280 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
3281 					err = write_commit_info(
3282 					    &s->line_offsets, &s->nlines,
3283 					    s->id2, &s->refs, s->repo, s->f);
3284 					if (err)
3285 						goto done;
3286 					break;
3287 				}
3288 			}
3289 		}
3290 		got_object_commit_close(commit2);
3291 
3292 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
3293 		    s->id1, s->id2, s->diff_context, s->ignore_whitespace,
3294 		    s->force_text_diff, s->repo, s->f);
3295 		break;
3296 	}
3297 	default:
3298 		err = got_error(GOT_ERR_OBJ_TYPE);
3299 		break;
3300 	}
3301 	if (err)
3302 		goto done;
3303 done:
3304 	if (s->f && fflush(s->f) != 0 && err == NULL)
3305 		err = got_error_from_errno("fflush");
3306 	return err;
3307 }
3308 
3309 static void
3310 diff_view_indicate_progress(struct tog_view *view)
3311 {
3312 	mvwaddstr(view->window, 0, 0, "diffing...");
3313 	update_panels();
3314 	doupdate();
3315 }
3316 
3317 static const struct got_error *
3318 search_start_diff_view(struct tog_view *view)
3319 {
3320 	struct tog_diff_view_state *s = &view->state.diff;
3321 
3322 	s->matched_line = 0;
3323 	return NULL;
3324 }
3325 
3326 static const struct got_error *
3327 search_next_diff_view(struct tog_view *view)
3328 {
3329 	struct tog_diff_view_state *s = &view->state.diff;
3330 	int lineno;
3331 
3332 	if (!view->searching) {
3333 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
3334 		return NULL;
3335 	}
3336 
3337 	if (s->matched_line) {
3338 		if (view->searching == TOG_SEARCH_FORWARD)
3339 			lineno = s->matched_line + 1;
3340 		else
3341 			lineno = s->matched_line - 1;
3342 	} else {
3343 		if (view->searching == TOG_SEARCH_FORWARD)
3344 			lineno = 1;
3345 		else
3346 			lineno = s->nlines;
3347 	}
3348 
3349 	while (1) {
3350 		char *line = NULL;
3351 		off_t offset;
3352 		size_t len;
3353 
3354 		if (lineno <= 0 || lineno > s->nlines) {
3355 			if (s->matched_line == 0) {
3356 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3357 				free(line);
3358 				break;
3359 			}
3360 
3361 			if (view->searching == TOG_SEARCH_FORWARD)
3362 				lineno = 1;
3363 			else
3364 				lineno = s->nlines;
3365 		}
3366 
3367 		offset = s->line_offsets[lineno - 1];
3368 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
3369 			free(line);
3370 			return got_error_from_errno("fseeko");
3371 		}
3372 		free(line);
3373 		line = parse_next_line(s->f, &len);
3374 		if (line &&
3375 		    match_line(line, &view->regex, 1, &view->regmatch)) {
3376 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3377 			s->matched_line = lineno;
3378 			free(line);
3379 			break;
3380 		}
3381 		free(line);
3382 		if (view->searching == TOG_SEARCH_FORWARD)
3383 			lineno++;
3384 		else
3385 			lineno--;
3386 	}
3387 
3388 	if (s->matched_line) {
3389 		s->first_displayed_line = s->matched_line;
3390 		s->selected_line = 1;
3391 	}
3392 
3393 	return NULL;
3394 }
3395 
3396 static const struct got_error *
3397 open_diff_view(struct tog_view *view, struct got_object_id *id1,
3398     struct got_object_id *id2, const char *label1, const char *label2,
3399     int diff_context, int ignore_whitespace, int force_text_diff,
3400     struct tog_view *log_view, struct got_repository *repo)
3401 {
3402 	const struct got_error *err;
3403 	struct tog_diff_view_state *s = &view->state.diff;
3404 
3405 	SIMPLEQ_INIT(&s->refs);
3406 
3407 	if (id1 != NULL && id2 != NULL) {
3408 	    int type1, type2;
3409 	    err = got_object_get_type(&type1, repo, id1);
3410 	    if (err)
3411 		return err;
3412 	    err = got_object_get_type(&type2, repo, id2);
3413 	    if (err)
3414 		return err;
3415 
3416 	    if (type1 != type2)
3417 		return got_error(GOT_ERR_OBJ_TYPE);
3418 	}
3419 	s->first_displayed_line = 1;
3420 	s->last_displayed_line = view->nlines;
3421 	s->selected_line = 1;
3422 	s->repo = repo;
3423 	s->id1 = id1;
3424 	s->id2 = id2;
3425 	s->label1 = label1;
3426 	s->label2 = label2;
3427 
3428 	if (id1) {
3429 		s->id1 = got_object_id_dup(id1);
3430 		if (s->id1 == NULL)
3431 			return got_error_from_errno("got_object_id_dup");
3432 	} else
3433 		s->id1 = NULL;
3434 
3435 	s->id2 = got_object_id_dup(id2);
3436 	if (s->id2 == NULL) {
3437 		free(s->id1);
3438 		s->id1 = NULL;
3439 		return got_error_from_errno("got_object_id_dup");
3440 	}
3441 	s->f = NULL;
3442 	s->first_displayed_line = 1;
3443 	s->last_displayed_line = view->nlines;
3444 	s->diff_context = diff_context;
3445 	s->ignore_whitespace = ignore_whitespace;
3446 	s->force_text_diff = force_text_diff;
3447 	s->log_view = log_view;
3448 	s->repo = repo;
3449 
3450 	SIMPLEQ_INIT(&s->colors);
3451 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3452 		err = add_color(&s->colors,
3453 		    "^-", TOG_COLOR_DIFF_MINUS,
3454 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
3455 		if (err)
3456 			return err;
3457 		err = add_color(&s->colors, "^\\+",
3458 		    TOG_COLOR_DIFF_PLUS,
3459 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
3460 		if (err) {
3461 			free_colors(&s->colors);
3462 			return err;
3463 		}
3464 		err = add_color(&s->colors,
3465 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
3466 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
3467 		if (err) {
3468 			free_colors(&s->colors);
3469 			return err;
3470 		}
3471 
3472 		err = add_color(&s->colors,
3473 		    "^(commit [0-9a-f]|(blob|file) [-+] |[MDmA]  [^ ])",
3474 		    TOG_COLOR_DIFF_META,
3475 		    get_color_value("TOG_COLOR_DIFF_META"));
3476 		if (err) {
3477 			free_colors(&s->colors);
3478 			return err;
3479 		}
3480 
3481 		err = add_color(&s->colors,
3482 		    "^(from|via): ", TOG_COLOR_AUTHOR,
3483 		    get_color_value("TOG_COLOR_AUTHOR"));
3484 		if (err) {
3485 			free_colors(&s->colors);
3486 			return err;
3487 		}
3488 
3489 		err = add_color(&s->colors,
3490 		    "^date: ", TOG_COLOR_DATE,
3491 		    get_color_value("TOG_COLOR_DATE"));
3492 		if (err) {
3493 			free_colors(&s->colors);
3494 			return err;
3495 		}
3496 	}
3497 
3498 	err = got_ref_list(&s->refs, repo, NULL, got_ref_cmp_by_name, NULL);
3499 	if (err) {
3500 		free(s->id1);
3501 		s->id1 = NULL;
3502 		free(s->id2);
3503 		s->id2 = NULL;
3504 		free_colors(&s->colors);
3505 		return err;
3506 	}
3507 
3508 	if (log_view && view_is_splitscreen(view))
3509 		show_log_view(log_view); /* draw vborder */
3510 	diff_view_indicate_progress(view);
3511 
3512 	s->line_offsets = NULL;
3513 	s->nlines = 0;
3514 	err = create_diff(s);
3515 	if (err) {
3516 		free(s->id1);
3517 		s->id1 = NULL;
3518 		free(s->id2);
3519 		s->id2 = NULL;
3520 		free_colors(&s->colors);
3521 		got_ref_list_free(&s->refs);
3522 		return err;
3523 	}
3524 
3525 	view->show = show_diff_view;
3526 	view->input = input_diff_view;
3527 	view->close = close_diff_view;
3528 	view->search_start = search_start_diff_view;
3529 	view->search_next = search_next_diff_view;
3530 
3531 	return NULL;
3532 }
3533 
3534 static const struct got_error *
3535 close_diff_view(struct tog_view *view)
3536 {
3537 	const struct got_error *err = NULL;
3538 	struct tog_diff_view_state *s = &view->state.diff;
3539 
3540 	free(s->id1);
3541 	s->id1 = NULL;
3542 	free(s->id2);
3543 	s->id2 = NULL;
3544 	if (s->f && fclose(s->f) == EOF)
3545 		err = got_error_from_errno("fclose");
3546 	free_colors(&s->colors);
3547 	free(s->line_offsets);
3548 	s->line_offsets = NULL;
3549 	s->nlines = 0;
3550 	got_ref_list_free(&s->refs);
3551 	return err;
3552 }
3553 
3554 static const struct got_error *
3555 show_diff_view(struct tog_view *view)
3556 {
3557 	const struct got_error *err;
3558 	struct tog_diff_view_state *s = &view->state.diff;
3559 	char *id_str1 = NULL, *id_str2, *header;
3560 	const char *label1, *label2;
3561 
3562 	if (s->id1) {
3563 		err = got_object_id_str(&id_str1, s->id1);
3564 		if (err)
3565 			return err;
3566 		label1 = s->label1 ? : id_str1;
3567 	} else
3568 		label1 = "/dev/null";
3569 
3570 	err = got_object_id_str(&id_str2, s->id2);
3571 	if (err)
3572 		return err;
3573 	label2 = s->label2 ? : id_str2;
3574 
3575 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
3576 		err = got_error_from_errno("asprintf");
3577 		free(id_str1);
3578 		free(id_str2);
3579 		return err;
3580 	}
3581 	free(id_str1);
3582 	free(id_str2);
3583 
3584 	return draw_file(view, s->f, s->first_displayed_line, s->nlines,
3585 	    s->line_offsets, s->selected_line, view->nlines,
3586 	    &s->last_displayed_line, &s->eof, header, &s->colors,
3587 	    s->matched_line, &view->regmatch);
3588 }
3589 
3590 static const struct got_error *
3591 set_selected_commit(struct tog_diff_view_state *s,
3592     struct commit_queue_entry *entry)
3593 {
3594 	const struct got_error *err;
3595 	const struct got_object_id_queue *parent_ids;
3596 	struct got_commit_object *selected_commit;
3597 	struct got_object_qid *pid;
3598 
3599 	free(s->id2);
3600 	s->id2 = got_object_id_dup(entry->id);
3601 	if (s->id2 == NULL)
3602 		return got_error_from_errno("got_object_id_dup");
3603 
3604 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
3605 	if (err)
3606 		return err;
3607 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
3608 	free(s->id1);
3609 	pid = SIMPLEQ_FIRST(parent_ids);
3610 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
3611 	got_object_commit_close(selected_commit);
3612 	return NULL;
3613 }
3614 
3615 static const struct got_error *
3616 input_diff_view(struct tog_view **new_view, struct tog_view **dead_view,
3617     struct tog_view **focus_view, struct tog_view *view, int ch)
3618 {
3619 	const struct got_error *err = NULL;
3620 	struct tog_diff_view_state *s = &view->state.diff;
3621 	struct tog_log_view_state *ls;
3622 	struct commit_queue_entry *entry;
3623 	int i;
3624 
3625 	switch (ch) {
3626 	case 'a':
3627 	case 'w':
3628 		if (ch == 'a')
3629 			s->force_text_diff = !s->force_text_diff;
3630 		if (ch == 'w')
3631 			s->ignore_whitespace = !s->ignore_whitespace;
3632 		wclear(view->window);
3633 		s->first_displayed_line = 1;
3634 		s->last_displayed_line = view->nlines;
3635 		diff_view_indicate_progress(view);
3636 		err = create_diff(s);
3637 		break;
3638 	case 'k':
3639 	case KEY_UP:
3640 		if (s->first_displayed_line > 1)
3641 			s->first_displayed_line--;
3642 		break;
3643 	case KEY_PPAGE:
3644 	case CTRL('b'):
3645 		if (s->first_displayed_line == 1)
3646 			break;
3647 		i = 0;
3648 		while (i++ < view->nlines - 1 &&
3649 		    s->first_displayed_line > 1)
3650 			s->first_displayed_line--;
3651 		break;
3652 	case 'j':
3653 	case KEY_DOWN:
3654 		if (!s->eof)
3655 			s->first_displayed_line++;
3656 		break;
3657 	case KEY_NPAGE:
3658 	case CTRL('f'):
3659 	case ' ':
3660 		if (s->eof)
3661 			break;
3662 		i = 0;
3663 		while (!s->eof && i++ < view->nlines - 1) {
3664 			char *line;
3665 			line = parse_next_line(s->f, NULL);
3666 			s->first_displayed_line++;
3667 			if (line == NULL)
3668 				break;
3669 		}
3670 		break;
3671 	case '[':
3672 		if (s->diff_context > 0) {
3673 			s->diff_context--;
3674 			diff_view_indicate_progress(view);
3675 			err = create_diff(s);
3676 			if (s->first_displayed_line + view->nlines - 1 >
3677 			    s->nlines) {
3678 				s->first_displayed_line = 1;
3679 				s->last_displayed_line = view->nlines;
3680 			}
3681 		}
3682 		break;
3683 	case ']':
3684 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
3685 			s->diff_context++;
3686 			diff_view_indicate_progress(view);
3687 			err = create_diff(s);
3688 		}
3689 		break;
3690 	case '<':
3691 	case ',':
3692 		if (s->log_view == NULL)
3693 			break;
3694 		ls = &s->log_view->state.log;
3695 		entry = TAILQ_PREV(ls->selected_entry,
3696 		    commit_queue_head, entry);
3697 		if (entry == NULL)
3698 			break;
3699 
3700 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3701 		    KEY_UP);
3702 		if (err)
3703 			break;
3704 
3705 		err = set_selected_commit(s, entry);
3706 		if (err)
3707 			break;
3708 
3709 		s->first_displayed_line = 1;
3710 		s->last_displayed_line = view->nlines;
3711 
3712 		diff_view_indicate_progress(view);
3713 		err = create_diff(s);
3714 		break;
3715 	case '>':
3716 	case '.':
3717 		if (s->log_view == NULL)
3718 			break;
3719 		ls = &s->log_view->state.log;
3720 
3721 		if (TAILQ_NEXT(ls->selected_entry, entry) == NULL) {
3722 			ls->thread_args.commits_needed++;
3723 			err = trigger_log_thread(s->log_view, 1);
3724 			if (err)
3725 				break;
3726 		}
3727 		err = input_log_view(NULL, NULL, NULL, s->log_view,
3728 		    KEY_DOWN);
3729 		if (err)
3730 			break;
3731 
3732 		entry = TAILQ_NEXT(ls->selected_entry, entry);
3733 		if (entry == NULL)
3734 			break;
3735 
3736 		err = set_selected_commit(s, entry);
3737 		if (err)
3738 			break;
3739 
3740 		s->first_displayed_line = 1;
3741 		s->last_displayed_line = view->nlines;
3742 
3743 		diff_view_indicate_progress(view);
3744 		err = create_diff(s);
3745 		break;
3746 	default:
3747 		break;
3748 	}
3749 
3750 	return err;
3751 }
3752 
3753 static const struct got_error *
3754 cmd_diff(int argc, char *argv[])
3755 {
3756 	const struct got_error *error = NULL;
3757 	struct got_repository *repo = NULL;
3758 	struct got_worktree *worktree = NULL;
3759 	struct got_object_id *id1 = NULL, *id2 = NULL;
3760 	char *repo_path = NULL, *cwd = NULL;
3761 	char *id_str1 = NULL, *id_str2 = NULL;
3762 	char *label1 = NULL, *label2 = NULL;
3763 	int diff_context = 3, ignore_whitespace = 0;
3764 	int ch, force_text_diff = 0;
3765 	const char *errstr;
3766 	struct tog_view *view;
3767 
3768 #ifndef PROFILE
3769 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
3770 	    NULL) == -1)
3771 		err(1, "pledge");
3772 #endif
3773 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
3774 		switch (ch) {
3775 		case 'a':
3776 			force_text_diff = 1;
3777 			break;
3778 		case 'C':
3779 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
3780 			    &errstr);
3781 			if (errstr != NULL)
3782 				err(1, "-C option %s", errstr);
3783 			break;
3784 		case 'r':
3785 			repo_path = realpath(optarg, NULL);
3786 			if (repo_path == NULL)
3787 				return got_error_from_errno2("realpath",
3788 				    optarg);
3789 			got_path_strip_trailing_slashes(repo_path);
3790 			break;
3791 		case 'w':
3792 			ignore_whitespace = 1;
3793 			break;
3794 		default:
3795 			usage_diff();
3796 			/* NOTREACHED */
3797 		}
3798 	}
3799 
3800 	argc -= optind;
3801 	argv += optind;
3802 
3803 	if (argc == 0) {
3804 		usage_diff(); /* TODO show local worktree changes */
3805 	} else if (argc == 2) {
3806 		id_str1 = argv[0];
3807 		id_str2 = argv[1];
3808 	} else
3809 		usage_diff();
3810 
3811 	cwd = getcwd(NULL, 0);
3812 	if (cwd == NULL)
3813 		return got_error_from_errno("getcwd");
3814 
3815 	error = got_worktree_open(&worktree, cwd);
3816 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
3817 		goto done;
3818 
3819 	if (repo_path == NULL) {
3820 		if (worktree)
3821 			repo_path =
3822 			    strdup(got_worktree_get_repo_path(worktree));
3823 		else
3824 			repo_path = strdup(cwd);
3825 	}
3826 	if (repo_path == NULL) {
3827 		error = got_error_from_errno("strdup");
3828 		goto done;
3829 	}
3830 
3831 	error = got_repo_open(&repo, repo_path, NULL);
3832 	if (error)
3833 		goto done;
3834 
3835 	init_curses();
3836 
3837 	error = apply_unveil(got_repo_get_path(repo), NULL);
3838 	if (error)
3839 		goto done;
3840 
3841 	error = got_repo_match_object_id(&id1, &label1, id_str1,
3842 	    GOT_OBJ_TYPE_ANY, 1, repo);
3843 	if (error)
3844 		goto done;
3845 
3846 	error = got_repo_match_object_id(&id2, &label2, id_str2,
3847 	    GOT_OBJ_TYPE_ANY, 1, repo);
3848 	if (error)
3849 		goto done;
3850 
3851 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
3852 	if (view == NULL) {
3853 		error = got_error_from_errno("view_open");
3854 		goto done;
3855 	}
3856 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
3857 	    ignore_whitespace, force_text_diff, NULL,  repo);
3858 	if (error)
3859 		goto done;
3860 	error = view_loop(view);
3861 done:
3862 	free(label1);
3863 	free(label2);
3864 	free(repo_path);
3865 	free(cwd);
3866 	if (repo)
3867 		got_repo_close(repo);
3868 	if (worktree)
3869 		got_worktree_close(worktree);
3870 	return error;
3871 }
3872 
3873 __dead static void
3874 usage_blame(void)
3875 {
3876 	endwin();
3877 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
3878 	    getprogname());
3879 	exit(1);
3880 }
3881 
3882 struct tog_blame_line {
3883 	int annotated;
3884 	struct got_object_id *id;
3885 };
3886 
3887 static const struct got_error *
3888 draw_blame(struct tog_view *view, struct got_object_id *id, FILE *f,
3889     const char *path, struct tog_blame_line *lines, int nlines,
3890     int blame_complete, int selected_line, int *first_displayed_line,
3891     int *last_displayed_line, int *eof, int max_lines,
3892     struct tog_colors *colors, int matched_line, regmatch_t *regmatch)
3893 {
3894 	const struct got_error *err;
3895 	int lineno = 0, nprinted = 0;
3896 	char *line;
3897 	size_t len;
3898 	wchar_t *wline;
3899 	int width;
3900 	struct tog_blame_line *blame_line;
3901 	struct got_object_id *prev_id = NULL;
3902 	char *id_str;
3903 	struct tog_color *tc;
3904 
3905 	err = got_object_id_str(&id_str, id);
3906 	if (err)
3907 		return err;
3908 
3909 	rewind(f);
3910 	werase(view->window);
3911 
3912 	if (asprintf(&line, "commit %s", id_str) == -1) {
3913 		err = got_error_from_errno("asprintf");
3914 		free(id_str);
3915 		return err;
3916 	}
3917 
3918 	err = format_line(&wline, &width, line, view->ncols, 0);
3919 	free(line);
3920 	line = NULL;
3921 	if (err)
3922 		return err;
3923 	if (view_needs_focus_indication(view))
3924 		wstandout(view->window);
3925 	tc = get_color(colors, TOG_COLOR_COMMIT);
3926 	if (tc)
3927 		wattr_on(view->window,
3928 		    COLOR_PAIR(tc->colorpair), NULL);
3929 	waddwstr(view->window, wline);
3930 	if (tc)
3931 		wattr_off(view->window,
3932 		    COLOR_PAIR(tc->colorpair), NULL);
3933 	if (view_needs_focus_indication(view))
3934 		wstandend(view->window);
3935 	free(wline);
3936 	wline = NULL;
3937 	if (width < view->ncols - 1)
3938 		waddch(view->window, '\n');
3939 
3940 	if (asprintf(&line, "[%d/%d] %s%s",
3941 	    *first_displayed_line - 1 + selected_line, nlines,
3942 	    blame_complete ? "" : "annotating... ", path) == -1) {
3943 		free(id_str);
3944 		return got_error_from_errno("asprintf");
3945 	}
3946 	free(id_str);
3947 	err = format_line(&wline, &width, line, view->ncols, 0);
3948 	free(line);
3949 	line = NULL;
3950 	if (err)
3951 		return err;
3952 	waddwstr(view->window, wline);
3953 	free(wline);
3954 	wline = NULL;
3955 	if (width < view->ncols - 1)
3956 		waddch(view->window, '\n');
3957 
3958 	*eof = 0;
3959 	while (nprinted < max_lines - 2) {
3960 		line = parse_next_line(f, &len);
3961 		if (line == NULL) {
3962 			*eof = 1;
3963 			break;
3964 		}
3965 		if (++lineno < *first_displayed_line) {
3966 			free(line);
3967 			continue;
3968 		}
3969 
3970 		if (view->focussed && nprinted == selected_line - 1)
3971 			wstandout(view->window);
3972 
3973 		if (nlines > 0) {
3974 			blame_line = &lines[lineno - 1];
3975 			if (blame_line->annotated && prev_id &&
3976 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
3977 			    !(view->focussed &&
3978 			    nprinted == selected_line - 1)) {
3979 				waddstr(view->window, "        ");
3980 			} else if (blame_line->annotated) {
3981 				char *id_str;
3982 				err = got_object_id_str(&id_str, blame_line->id);
3983 				if (err) {
3984 					free(line);
3985 					return err;
3986 				}
3987 				tc = get_color(colors, TOG_COLOR_COMMIT);
3988 				if (tc)
3989 					wattr_on(view->window,
3990 					    COLOR_PAIR(tc->colorpair), NULL);
3991 				wprintw(view->window, "%.8s", id_str);
3992 				if (tc)
3993 					wattr_off(view->window,
3994 					    COLOR_PAIR(tc->colorpair), NULL);
3995 				free(id_str);
3996 				prev_id = blame_line->id;
3997 			} else {
3998 				waddstr(view->window, "........");
3999 				prev_id = NULL;
4000 			}
4001 		} else {
4002 			waddstr(view->window, "........");
4003 			prev_id = NULL;
4004 		}
4005 
4006 		if (view->focussed && nprinted == selected_line - 1)
4007 			wstandend(view->window);
4008 		waddstr(view->window, " ");
4009 
4010 		if (view->ncols <= 9) {
4011 			width = 9;
4012 			wline = wcsdup(L"");
4013 			if (wline == NULL) {
4014 				err = got_error_from_errno("wcsdup");
4015 				free(line);
4016 				return err;
4017 			}
4018 		} else if (*first_displayed_line + nprinted == matched_line &&
4019 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4020 			err = add_matched_line(&width, line, view->ncols - 9, 9,
4021 			    view->window, regmatch);
4022 			if (err) {
4023 				free(line);
4024 				return err;
4025 			}
4026 			width += 9;
4027 		} else {
4028 			err = format_line(&wline, &width, line,
4029 			    view->ncols - 9, 9);
4030 			waddwstr(view->window, wline);
4031 			free(wline);
4032 			wline = NULL;
4033 			width += 9;
4034 		}
4035 
4036 		if (width <= view->ncols - 1)
4037 			waddch(view->window, '\n');
4038 		if (++nprinted == 1)
4039 			*first_displayed_line = lineno;
4040 		free(line);
4041 	}
4042 	*last_displayed_line = lineno;
4043 
4044 	view_vborder(view);
4045 
4046 	return NULL;
4047 }
4048 
4049 static const struct got_error *
4050 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
4051 {
4052 	const struct got_error *err = NULL;
4053 	struct tog_blame_cb_args *a = arg;
4054 	struct tog_blame_line *line;
4055 	int errcode;
4056 
4057 	if (nlines != a->nlines ||
4058 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
4059 		return got_error(GOT_ERR_RANGE);
4060 
4061 	errcode = pthread_mutex_lock(&tog_mutex);
4062 	if (errcode)
4063 		return got_error_set_errno(errcode, "pthread_mutex_lock");
4064 
4065 	if (*a->quit) {	/* user has quit the blame view */
4066 		err = got_error(GOT_ERR_ITER_COMPLETED);
4067 		goto done;
4068 	}
4069 
4070 	if (lineno == -1)
4071 		goto done; /* no change in this commit */
4072 
4073 	line = &a->lines[lineno - 1];
4074 	if (line->annotated)
4075 		goto done;
4076 
4077 	line->id = got_object_id_dup(id);
4078 	if (line->id == NULL) {
4079 		err = got_error_from_errno("got_object_id_dup");
4080 		goto done;
4081 	}
4082 	line->annotated = 1;
4083 done:
4084 	errcode = pthread_mutex_unlock(&tog_mutex);
4085 	if (errcode)
4086 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4087 	return err;
4088 }
4089 
4090 static void *
4091 blame_thread(void *arg)
4092 {
4093 	const struct got_error *err;
4094 	struct tog_blame_thread_args *ta = arg;
4095 	struct tog_blame_cb_args *a = ta->cb_args;
4096 	int errcode;
4097 
4098 	err = block_signals_used_by_main_thread();
4099 	if (err)
4100 		return (void *)err;
4101 
4102 	err = got_blame(ta->path, a->commit_id, ta->repo,
4103 	    blame_cb, ta->cb_args, ta->cancel_cb, ta->cancel_arg);
4104 	if (err && err->code == GOT_ERR_CANCELLED)
4105 		err = NULL;
4106 
4107 	errcode = pthread_mutex_lock(&tog_mutex);
4108 	if (errcode)
4109 		return (void *)got_error_set_errno(errcode,
4110 		    "pthread_mutex_lock");
4111 
4112 	got_repo_close(ta->repo);
4113 	ta->repo = NULL;
4114 	*ta->complete = 1;
4115 
4116 	errcode = pthread_mutex_unlock(&tog_mutex);
4117 	if (errcode && err == NULL)
4118 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
4119 
4120 	return (void *)err;
4121 }
4122 
4123 static struct got_object_id *
4124 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
4125     int first_displayed_line, int selected_line)
4126 {
4127 	struct tog_blame_line *line;
4128 
4129 	if (nlines <= 0)
4130 		return NULL;
4131 
4132 	line = &lines[first_displayed_line - 1 + selected_line - 1];
4133 	if (!line->annotated)
4134 		return NULL;
4135 
4136 	return line->id;
4137 }
4138 
4139 static const struct got_error *
4140 stop_blame(struct tog_blame *blame)
4141 {
4142 	const struct got_error *err = NULL;
4143 	int i;
4144 
4145 	if (blame->thread) {
4146 		int errcode;
4147 		errcode = pthread_mutex_unlock(&tog_mutex);
4148 		if (errcode)
4149 			return got_error_set_errno(errcode,
4150 			    "pthread_mutex_unlock");
4151 		errcode = pthread_join(blame->thread, (void **)&err);
4152 		if (errcode)
4153 			return got_error_set_errno(errcode, "pthread_join");
4154 		errcode = pthread_mutex_lock(&tog_mutex);
4155 		if (errcode)
4156 			return got_error_set_errno(errcode,
4157 			    "pthread_mutex_lock");
4158 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
4159 			err = NULL;
4160 		blame->thread = NULL;
4161 	}
4162 	if (blame->thread_args.repo) {
4163 		got_repo_close(blame->thread_args.repo);
4164 		blame->thread_args.repo = NULL;
4165 	}
4166 	if (blame->f) {
4167 		if (fclose(blame->f) != 0 && err == NULL)
4168 			err = got_error_from_errno("fclose");
4169 		blame->f = NULL;
4170 	}
4171 	if (blame->lines) {
4172 		for (i = 0; i < blame->nlines; i++)
4173 			free(blame->lines[i].id);
4174 		free(blame->lines);
4175 		blame->lines = NULL;
4176 	}
4177 	free(blame->cb_args.commit_id);
4178 	blame->cb_args.commit_id = NULL;
4179 
4180 	return err;
4181 }
4182 
4183 static const struct got_error *
4184 cancel_blame_view(void *arg)
4185 {
4186 	const struct got_error *err = NULL;
4187 	int *done = arg;
4188 	int errcode;
4189 
4190 	errcode = pthread_mutex_lock(&tog_mutex);
4191 	if (errcode)
4192 		return got_error_set_errno(errcode,
4193 		    "pthread_mutex_unlock");
4194 
4195 	if (*done)
4196 		err = got_error(GOT_ERR_CANCELLED);
4197 
4198 	errcode = pthread_mutex_unlock(&tog_mutex);
4199 	if (errcode)
4200 		return got_error_set_errno(errcode,
4201 		    "pthread_mutex_lock");
4202 
4203 	return err;
4204 }
4205 
4206 static const struct got_error *
4207 run_blame(struct tog_view *view)
4208 {
4209 	struct tog_blame_view_state *s = &view->state.blame;
4210 	struct tog_blame *blame = &s->blame;
4211 	const struct got_error *err = NULL;
4212 	struct got_blob_object *blob = NULL;
4213 	struct got_repository *thread_repo = NULL;
4214 	struct got_object_id *obj_id = NULL;
4215 	int obj_type;
4216 
4217 	err = got_object_id_by_path(&obj_id, s->repo, s->blamed_commit->id,
4218 	    s->path);
4219 	if (err)
4220 		return err;
4221 
4222 	err = got_object_get_type(&obj_type, s->repo, obj_id);
4223 	if (err)
4224 		goto done;
4225 
4226 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
4227 		err = got_error(GOT_ERR_OBJ_TYPE);
4228 		goto done;
4229 	}
4230 
4231 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192);
4232 	if (err)
4233 		goto done;
4234 	blame->f = got_opentemp();
4235 	if (blame->f == NULL) {
4236 		err = got_error_from_errno("got_opentemp");
4237 		goto done;
4238 	}
4239 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
4240 	    &blame->line_offsets, blame->f, blob);
4241 	if (err || blame->nlines == 0)
4242 		goto done;
4243 
4244 	/* Don't include \n at EOF in the blame line count. */
4245 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
4246 		blame->nlines--;
4247 
4248 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
4249 	if (blame->lines == NULL) {
4250 		err = got_error_from_errno("calloc");
4251 		goto done;
4252 	}
4253 
4254 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL);
4255 	if (err)
4256 		goto done;
4257 
4258 	blame->cb_args.view = view;
4259 	blame->cb_args.lines = blame->lines;
4260 	blame->cb_args.nlines = blame->nlines;
4261 	blame->cb_args.commit_id = got_object_id_dup(s->blamed_commit->id);
4262 	if (blame->cb_args.commit_id == NULL) {
4263 		err = got_error_from_errno("got_object_id_dup");
4264 		goto done;
4265 	}
4266 	blame->cb_args.quit = &s->done;
4267 
4268 	blame->thread_args.path = s->path;
4269 	blame->thread_args.repo = thread_repo;
4270 	blame->thread_args.cb_args = &blame->cb_args;
4271 	blame->thread_args.complete = &s->blame_complete;
4272 	blame->thread_args.cancel_cb = cancel_blame_view;
4273 	blame->thread_args.cancel_arg = &s->done;
4274 	s->blame_complete = 0;
4275 
4276 done:
4277 	if (blob)
4278 		got_object_blob_close(blob);
4279 	free(obj_id);
4280 	if (err)
4281 		stop_blame(blame);
4282 	return err;
4283 }
4284 
4285 static const struct got_error *
4286 open_blame_view(struct tog_view *view, char *path,
4287     struct got_object_id *commit_id, struct got_repository *repo)
4288 {
4289 	const struct got_error *err = NULL;
4290 	struct tog_blame_view_state *s = &view->state.blame;
4291 
4292 	SIMPLEQ_INIT(&s->blamed_commits);
4293 
4294 	s->path = strdup(path);
4295 	if (s->path == NULL)
4296 		return got_error_from_errno("strdup");
4297 
4298 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
4299 	if (err) {
4300 		free(s->path);
4301 		return err;
4302 	}
4303 
4304 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
4305 	s->first_displayed_line = 1;
4306 	s->last_displayed_line = view->nlines;
4307 	s->selected_line = 1;
4308 	s->blame_complete = 0;
4309 	s->repo = repo;
4310 	s->commit_id = commit_id;
4311 	memset(&s->blame, 0, sizeof(s->blame));
4312 
4313 	SIMPLEQ_INIT(&s->colors);
4314 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4315 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
4316 		    get_color_value("TOG_COLOR_COMMIT"));
4317 		if (err)
4318 			return err;
4319 	}
4320 
4321 	view->show = show_blame_view;
4322 	view->input = input_blame_view;
4323 	view->close = close_blame_view;
4324 	view->search_start = search_start_blame_view;
4325 	view->search_next = search_next_blame_view;
4326 
4327 	return run_blame(view);
4328 }
4329 
4330 static const struct got_error *
4331 close_blame_view(struct tog_view *view)
4332 {
4333 	const struct got_error *err = NULL;
4334 	struct tog_blame_view_state *s = &view->state.blame;
4335 
4336 	if (s->blame.thread)
4337 		err = stop_blame(&s->blame);
4338 
4339 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
4340 		struct got_object_qid *blamed_commit;
4341 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
4342 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4343 		got_object_qid_free(blamed_commit);
4344 	}
4345 
4346 	free(s->path);
4347 	free_colors(&s->colors);
4348 
4349 	return err;
4350 }
4351 
4352 static const struct got_error *
4353 search_start_blame_view(struct tog_view *view)
4354 {
4355 	struct tog_blame_view_state *s = &view->state.blame;
4356 
4357 	s->matched_line = 0;
4358 	return NULL;
4359 }
4360 
4361 static const struct got_error *
4362 search_next_blame_view(struct tog_view *view)
4363 {
4364 	struct tog_blame_view_state *s = &view->state.blame;
4365 	int lineno;
4366 
4367 	if (!view->searching) {
4368 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4369 		return NULL;
4370 	}
4371 
4372 	if (s->matched_line) {
4373 		if (view->searching == TOG_SEARCH_FORWARD)
4374 			lineno = s->matched_line + 1;
4375 		else
4376 			lineno = s->matched_line - 1;
4377 	} else {
4378 		if (view->searching == TOG_SEARCH_FORWARD)
4379 			lineno = 1;
4380 		else
4381 			lineno = s->blame.nlines;
4382 	}
4383 
4384 	while (1) {
4385 		char *line = NULL;
4386 		off_t offset;
4387 		size_t len;
4388 
4389 		if (lineno <= 0 || lineno > s->blame.nlines) {
4390 			if (s->matched_line == 0) {
4391 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4392 				free(line);
4393 				break;
4394 			}
4395 
4396 			if (view->searching == TOG_SEARCH_FORWARD)
4397 				lineno = 1;
4398 			else
4399 				lineno = s->blame.nlines;
4400 		}
4401 
4402 		offset = s->blame.line_offsets[lineno - 1];
4403 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
4404 			free(line);
4405 			return got_error_from_errno("fseeko");
4406 		}
4407 		free(line);
4408 		line = parse_next_line(s->blame.f, &len);
4409 		if (line &&
4410 		    match_line(line, &view->regex, 1, &view->regmatch)) {
4411 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
4412 			s->matched_line = lineno;
4413 			free(line);
4414 			break;
4415 		}
4416 		free(line);
4417 		if (view->searching == TOG_SEARCH_FORWARD)
4418 			lineno++;
4419 		else
4420 			lineno--;
4421 	}
4422 
4423 	if (s->matched_line) {
4424 		s->first_displayed_line = s->matched_line;
4425 		s->selected_line = 1;
4426 	}
4427 
4428 	return NULL;
4429 }
4430 
4431 static const struct got_error *
4432 show_blame_view(struct tog_view *view)
4433 {
4434 	const struct got_error *err = NULL;
4435 	struct tog_blame_view_state *s = &view->state.blame;
4436 	int errcode;
4437 
4438 	if (s->blame.thread == NULL) {
4439 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
4440 		    &s->blame.thread_args);
4441 		if (errcode)
4442 			return got_error_set_errno(errcode, "pthread_create");
4443 
4444 		halfdelay(1); /* fast refresh while annotating  */
4445 	}
4446 
4447 	if (s->blame_complete)
4448 		halfdelay(10); /* disable fast refresh */
4449 
4450 	err = draw_blame(view, s->blamed_commit->id, s->blame.f,
4451 	    s->path, s->blame.lines, s->blame.nlines, s->blame_complete,
4452 	    s->selected_line, &s->first_displayed_line,
4453 	    &s->last_displayed_line, &s->eof, view->nlines, &s->colors,
4454 	    s->matched_line, &view->regmatch);
4455 
4456 	view_vborder(view);
4457 	return err;
4458 }
4459 
4460 static const struct got_error *
4461 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
4462     struct tog_view **focus_view, struct tog_view *view, int ch)
4463 {
4464 	const struct got_error *err = NULL, *thread_err = NULL;
4465 	struct tog_view *diff_view;
4466 	struct tog_blame_view_state *s = &view->state.blame;
4467 	int begin_x = 0;
4468 
4469 	switch (ch) {
4470 	case 'q':
4471 		s->done = 1;
4472 		break;
4473 	case 'k':
4474 	case KEY_UP:
4475 		if (s->selected_line > 1)
4476 			s->selected_line--;
4477 		else if (s->selected_line == 1 &&
4478 		    s->first_displayed_line > 1)
4479 			s->first_displayed_line--;
4480 		break;
4481 	case KEY_PPAGE:
4482 	case CTRL('b'):
4483 		if (s->first_displayed_line == 1) {
4484 			s->selected_line = 1;
4485 			break;
4486 		}
4487 		if (s->first_displayed_line > view->nlines - 2)
4488 			s->first_displayed_line -=
4489 			    (view->nlines - 2);
4490 		else
4491 			s->first_displayed_line = 1;
4492 		break;
4493 	case 'j':
4494 	case KEY_DOWN:
4495 		if (s->selected_line < view->nlines - 2 &&
4496 		    s->first_displayed_line +
4497 		    s->selected_line <= s->blame.nlines)
4498 			s->selected_line++;
4499 		else if (s->last_displayed_line <
4500 		    s->blame.nlines)
4501 			s->first_displayed_line++;
4502 		break;
4503 	case 'b':
4504 	case 'p': {
4505 		struct got_object_id *id = NULL;
4506 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4507 		    s->first_displayed_line, s->selected_line);
4508 		if (id == NULL)
4509 			break;
4510 		if (ch == 'p') {
4511 			struct got_commit_object *commit;
4512 			struct got_object_qid *pid;
4513 			struct got_object_id *blob_id = NULL;
4514 			int obj_type;
4515 			err = got_object_open_as_commit(&commit,
4516 			    s->repo, id);
4517 			if (err)
4518 				break;
4519 			pid = SIMPLEQ_FIRST(
4520 			    got_object_commit_get_parent_ids(commit));
4521 			if (pid == NULL) {
4522 				got_object_commit_close(commit);
4523 				break;
4524 			}
4525 			/* Check if path history ends here. */
4526 			err = got_object_id_by_path(&blob_id, s->repo,
4527 			    pid->id, s->path);
4528 			if (err) {
4529 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
4530 					err = NULL;
4531 				got_object_commit_close(commit);
4532 				break;
4533 			}
4534 			err = got_object_get_type(&obj_type, s->repo,
4535 			    blob_id);
4536 			free(blob_id);
4537 			/* Can't blame non-blob type objects. */
4538 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
4539 				got_object_commit_close(commit);
4540 				break;
4541 			}
4542 			err = got_object_qid_alloc(&s->blamed_commit,
4543 			    pid->id);
4544 			got_object_commit_close(commit);
4545 		} else {
4546 			if (got_object_id_cmp(id,
4547 			    s->blamed_commit->id) == 0)
4548 				break;
4549 			err = got_object_qid_alloc(&s->blamed_commit,
4550 			    id);
4551 		}
4552 		if (err)
4553 			break;
4554 		s->done = 1;
4555 		thread_err = stop_blame(&s->blame);
4556 		s->done = 0;
4557 		if (thread_err)
4558 			break;
4559 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
4560 		    s->blamed_commit, entry);
4561 		err = run_blame(view);
4562 		if (err)
4563 			break;
4564 		break;
4565 	}
4566 	case 'B': {
4567 		struct got_object_qid *first;
4568 		first = SIMPLEQ_FIRST(&s->blamed_commits);
4569 		if (!got_object_id_cmp(first->id, s->commit_id))
4570 			break;
4571 		s->done = 1;
4572 		thread_err = stop_blame(&s->blame);
4573 		s->done = 0;
4574 		if (thread_err)
4575 			break;
4576 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
4577 		got_object_qid_free(s->blamed_commit);
4578 		s->blamed_commit =
4579 		    SIMPLEQ_FIRST(&s->blamed_commits);
4580 		err = run_blame(view);
4581 		if (err)
4582 			break;
4583 		break;
4584 	}
4585 	case KEY_ENTER:
4586 	case '\r': {
4587 		struct got_object_id *id = NULL;
4588 		struct got_object_qid *pid;
4589 		struct got_commit_object *commit = NULL;
4590 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
4591 		    s->first_displayed_line, s->selected_line);
4592 		if (id == NULL)
4593 			break;
4594 		err = got_object_open_as_commit(&commit, s->repo, id);
4595 		if (err)
4596 			break;
4597 		pid = SIMPLEQ_FIRST(
4598 		    got_object_commit_get_parent_ids(commit));
4599 		if (view_is_parent_view(view))
4600 		    begin_x = view_split_begin_x(view->begin_x);
4601 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
4602 		if (diff_view == NULL) {
4603 			got_object_commit_close(commit);
4604 			err = got_error_from_errno("view_open");
4605 			break;
4606 		}
4607 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
4608 		    id, NULL, NULL, 3, 0, 0, NULL, s->repo);
4609 		got_object_commit_close(commit);
4610 		if (err) {
4611 			view_close(diff_view);
4612 			break;
4613 		}
4614 		if (view_is_parent_view(view)) {
4615 			err = view_close_child(view);
4616 			if (err)
4617 				break;
4618 			err = view_set_child(view, diff_view);
4619 			if (err) {
4620 				view_close(diff_view);
4621 				break;
4622 			}
4623 			*focus_view = diff_view;
4624 			view->child_focussed = 1;
4625 		} else
4626 			*new_view = diff_view;
4627 		if (err)
4628 			break;
4629 		break;
4630 	}
4631 	case KEY_NPAGE:
4632 	case CTRL('f'):
4633 	case ' ':
4634 		if (s->last_displayed_line >= s->blame.nlines &&
4635 		    s->selected_line >= MIN(s->blame.nlines,
4636 		    view->nlines - 2)) {
4637 			break;
4638 		}
4639 		if (s->last_displayed_line >= s->blame.nlines &&
4640 		    s->selected_line < view->nlines - 2) {
4641 			s->selected_line = MIN(s->blame.nlines,
4642 			    view->nlines - 2);
4643 			break;
4644 		}
4645 		if (s->last_displayed_line + view->nlines - 2
4646 		    <= s->blame.nlines)
4647 			s->first_displayed_line +=
4648 			    view->nlines - 2;
4649 		else
4650 			s->first_displayed_line =
4651 			    s->blame.nlines -
4652 			    (view->nlines - 3);
4653 		break;
4654 	case KEY_RESIZE:
4655 		if (s->selected_line > view->nlines - 2) {
4656 			s->selected_line = MIN(s->blame.nlines,
4657 			    view->nlines - 2);
4658 		}
4659 		break;
4660 	default:
4661 		break;
4662 	}
4663 	return thread_err ? thread_err : err;
4664 }
4665 
4666 static const struct got_error *
4667 cmd_blame(int argc, char *argv[])
4668 {
4669 	const struct got_error *error;
4670 	struct got_repository *repo = NULL;
4671 	struct got_worktree *worktree = NULL;
4672 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
4673 	char *link_target = NULL;
4674 	struct got_object_id *commit_id = NULL;
4675 	char *commit_id_str = NULL;
4676 	int ch;
4677 	struct tog_view *view;
4678 
4679 #ifndef PROFILE
4680 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4681 	    NULL) == -1)
4682 		err(1, "pledge");
4683 #endif
4684 
4685 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
4686 		switch (ch) {
4687 		case 'c':
4688 			commit_id_str = optarg;
4689 			break;
4690 		case 'r':
4691 			repo_path = realpath(optarg, NULL);
4692 			if (repo_path == NULL)
4693 				return got_error_from_errno2("realpath",
4694 				    optarg);
4695 			break;
4696 		default:
4697 			usage_blame();
4698 			/* NOTREACHED */
4699 		}
4700 	}
4701 
4702 	argc -= optind;
4703 	argv += optind;
4704 
4705 	if (argc != 1)
4706 		usage_blame();
4707 
4708 	cwd = getcwd(NULL, 0);
4709 	if (cwd == NULL)
4710 		return got_error_from_errno("getcwd");
4711 
4712 	error = got_worktree_open(&worktree, cwd);
4713 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
4714 		goto done;
4715 
4716 	if (repo_path == NULL) {
4717 		if (worktree)
4718 			repo_path =
4719 			    strdup(got_worktree_get_repo_path(worktree));
4720 		else
4721 			repo_path = strdup(cwd);
4722 	}
4723 	if (repo_path == NULL) {
4724 		error = got_error_from_errno("strdup");
4725 		goto done;
4726 	}
4727 
4728 	error = got_repo_open(&repo, repo_path, NULL);
4729 	if (error != NULL)
4730 		goto done;
4731 
4732 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
4733 	    worktree);
4734 	if (error)
4735 		goto done;
4736 
4737 	init_curses();
4738 
4739 	error = apply_unveil(got_repo_get_path(repo), NULL);
4740 	if (error)
4741 		goto done;
4742 
4743 	if (commit_id_str == NULL) {
4744 		struct got_reference *head_ref;
4745 		error = got_ref_open(&head_ref, repo, worktree ?
4746 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
4747 		if (error != NULL)
4748 			goto done;
4749 		error = got_ref_resolve(&commit_id, repo, head_ref);
4750 		got_ref_close(head_ref);
4751 	} else {
4752 		error = got_repo_match_object_id(&commit_id, NULL,
4753 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, 1, repo);
4754 	}
4755 	if (error != NULL)
4756 		goto done;
4757 
4758 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
4759 	if (view == NULL) {
4760 		error = got_error_from_errno("view_open");
4761 		goto done;
4762 	}
4763 
4764 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
4765 	    commit_id, repo);
4766 	if (error)
4767 		goto done;
4768 
4769 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
4770 	    commit_id, repo);
4771 	if (error)
4772 		goto done;
4773 	if (worktree) {
4774 		/* Release work tree lock. */
4775 		got_worktree_close(worktree);
4776 		worktree = NULL;
4777 	}
4778 	error = view_loop(view);
4779 done:
4780 	free(repo_path);
4781 	free(in_repo_path);
4782 	free(link_target);
4783 	free(cwd);
4784 	free(commit_id);
4785 	if (worktree)
4786 		got_worktree_close(worktree);
4787 	if (repo)
4788 		got_repo_close(repo);
4789 	return error;
4790 }
4791 
4792 static const struct got_error *
4793 draw_tree_entries(struct tog_view *view,
4794     struct got_tree_entry **first_displayed_entry,
4795     struct got_tree_entry **last_displayed_entry,
4796     struct got_tree_entry **selected_entry, int *ndisplayed,
4797     const char *label, int show_ids, const char *parent_path,
4798     struct got_tree_object *tree, int selected, int limit,
4799     int isroot, struct tog_colors *colors, struct got_repository *repo)
4800 {
4801 	const struct got_error *err = NULL;
4802 	struct got_tree_entry *te;
4803 	wchar_t *wline;
4804 	struct tog_color *tc;
4805 	int width, n, i, nentries;
4806 
4807 	*ndisplayed = 0;
4808 
4809 	werase(view->window);
4810 
4811 	if (limit == 0)
4812 		return NULL;
4813 
4814 	err = format_line(&wline, &width, label, view->ncols, 0);
4815 	if (err)
4816 		return err;
4817 	if (view_needs_focus_indication(view))
4818 		wstandout(view->window);
4819 	tc = get_color(colors, TOG_COLOR_COMMIT);
4820 	if (tc)
4821 		wattr_on(view->window,
4822 		    COLOR_PAIR(tc->colorpair), NULL);
4823 	waddwstr(view->window, wline);
4824 	if (tc)
4825 		wattr_off(view->window,
4826 		    COLOR_PAIR(tc->colorpair), NULL);
4827 	if (view_needs_focus_indication(view))
4828 		wstandend(view->window);
4829 	free(wline);
4830 	wline = NULL;
4831 	if (width < view->ncols - 1)
4832 		waddch(view->window, '\n');
4833 	if (--limit <= 0)
4834 		return NULL;
4835 	err = format_line(&wline, &width, parent_path, view->ncols, 0);
4836 	if (err)
4837 		return err;
4838 	waddwstr(view->window, wline);
4839 	free(wline);
4840 	wline = NULL;
4841 	if (width < view->ncols - 1)
4842 		waddch(view->window, '\n');
4843 	if (--limit <= 0)
4844 		return NULL;
4845 	waddch(view->window, '\n');
4846 	if (--limit <= 0)
4847 		return NULL;
4848 
4849 	if (*first_displayed_entry == NULL) {
4850 		te = got_object_tree_get_first_entry(tree);
4851 		if (selected == 0) {
4852 			if (view->focussed)
4853 				wstandout(view->window);
4854 			*selected_entry = NULL;
4855 		}
4856 		waddstr(view->window, "  ..\n");	/* parent directory */
4857 		if (selected == 0 && view->focussed)
4858 			wstandend(view->window);
4859 		(*ndisplayed)++;
4860 		if (--limit <= 0)
4861 			return NULL;
4862 		n = 1;
4863 	} else {
4864 		n = 0;
4865 		te = *first_displayed_entry;
4866 	}
4867 
4868 	nentries = got_object_tree_get_nentries(tree);
4869 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
4870 		char *line = NULL, *id_str = NULL, *link_target = NULL;
4871 		const char *modestr = "";
4872 		mode_t mode;
4873 
4874 		te = got_object_tree_get_entry(tree, i);
4875 		mode = got_tree_entry_get_mode(te);
4876 
4877 		if (show_ids) {
4878 			err = got_object_id_str(&id_str,
4879 			    got_tree_entry_get_id(te));
4880 			if (err)
4881 				return got_error_from_errno(
4882 				    "got_object_id_str");
4883 		}
4884 		if (got_object_tree_entry_is_submodule(te))
4885 			modestr = "$";
4886 		else if (S_ISLNK(mode)) {
4887 			int i;
4888 
4889 			err = got_tree_entry_get_symlink_target(&link_target,
4890 			    te, repo);
4891 			if (err) {
4892 				free(id_str);
4893 				return err;
4894 			}
4895 			for (i = 0; i < strlen(link_target); i++) {
4896 				if (!isprint((unsigned char)link_target[i]))
4897 					link_target[i] = '?';
4898 			}
4899 			modestr = "@";
4900 		}
4901 		else if (S_ISDIR(mode))
4902 			modestr = "/";
4903 		else if (mode & S_IXUSR)
4904 			modestr = "*";
4905 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
4906 		    got_tree_entry_get_name(te), modestr,
4907 		    link_target ? " -> ": "",
4908 		    link_target ? link_target : "") == -1) {
4909 			free(id_str);
4910 			free(link_target);
4911 			return got_error_from_errno("asprintf");
4912 		}
4913 		free(id_str);
4914 		free(link_target);
4915 		err = format_line(&wline, &width, line, view->ncols, 0);
4916 		if (err) {
4917 			free(line);
4918 			break;
4919 		}
4920 		if (n == selected) {
4921 			if (view->focussed)
4922 				wstandout(view->window);
4923 			*selected_entry = te;
4924 		}
4925 		tc = match_color(colors, line);
4926 		if (tc)
4927 			wattr_on(view->window,
4928 			    COLOR_PAIR(tc->colorpair), NULL);
4929 		waddwstr(view->window, wline);
4930 		if (tc)
4931 			wattr_off(view->window,
4932 			    COLOR_PAIR(tc->colorpair), NULL);
4933 		if (width < view->ncols - 1)
4934 			waddch(view->window, '\n');
4935 		if (n == selected && view->focussed)
4936 			wstandend(view->window);
4937 		free(line);
4938 		free(wline);
4939 		wline = NULL;
4940 		n++;
4941 		(*ndisplayed)++;
4942 		*last_displayed_entry = te;
4943 		if (--limit <= 0)
4944 			break;
4945 	}
4946 
4947 	return err;
4948 }
4949 
4950 static void
4951 tree_scroll_up(struct tog_view *view, int maxscroll)
4952 {
4953 	struct tog_tree_view_state *s = &view->state.tree;
4954 	struct got_tree_entry *te;
4955 	int isroot = s->tree == s->root;
4956 	int i = 0;
4957 
4958 	if (s->first_displayed_entry == NULL)
4959 		return;
4960 
4961 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
4962 	while (i++ < maxscroll) {
4963 		if (te == NULL) {
4964 			if (!isroot)
4965 				s->first_displayed_entry = NULL;
4966 			break;
4967 		}
4968 		s->first_displayed_entry = te;
4969 		te = got_tree_entry_get_prev(s->tree, te);
4970 	}
4971 }
4972 
4973 static void
4974 tree_scroll_down(struct tog_view *view, int maxscroll)
4975 {
4976 	struct tog_tree_view_state *s = &view->state.tree;
4977 	struct got_tree_entry *next, *last;
4978 	int n = 0;
4979 
4980 	if (s->first_displayed_entry)
4981 		next = got_tree_entry_get_next(s->tree,
4982 		    s->first_displayed_entry);
4983 	else
4984 		next = got_object_tree_get_first_entry(s->tree);
4985 
4986 	last = s->last_displayed_entry;
4987 	while (next && last && n++ < maxscroll) {
4988 		last = got_tree_entry_get_next(s->tree, last);
4989 		if (last) {
4990 			s->first_displayed_entry = next;
4991 			next = got_tree_entry_get_next(s->tree, next);
4992 		}
4993 	}
4994 }
4995 
4996 static const struct got_error *
4997 tree_entry_path(char **path, struct tog_parent_trees *parents,
4998     struct got_tree_entry *te)
4999 {
5000 	const struct got_error *err = NULL;
5001 	struct tog_parent_tree *pt;
5002 	size_t len = 2; /* for leading slash and NUL */
5003 
5004 	TAILQ_FOREACH(pt, parents, entry)
5005 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
5006 		    + 1 /* slash */;
5007 	if (te)
5008 		len += strlen(got_tree_entry_get_name(te));
5009 
5010 	*path = calloc(1, len);
5011 	if (path == NULL)
5012 		return got_error_from_errno("calloc");
5013 
5014 	(*path)[0] = '/';
5015 	pt = TAILQ_LAST(parents, tog_parent_trees);
5016 	while (pt) {
5017 		const char *name = got_tree_entry_get_name(pt->selected_entry);
5018 		if (strlcat(*path, name, len) >= len) {
5019 			err = got_error(GOT_ERR_NO_SPACE);
5020 			goto done;
5021 		}
5022 		if (strlcat(*path, "/", len) >= len) {
5023 			err = got_error(GOT_ERR_NO_SPACE);
5024 			goto done;
5025 		}
5026 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
5027 	}
5028 	if (te) {
5029 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
5030 			err = got_error(GOT_ERR_NO_SPACE);
5031 			goto done;
5032 		}
5033 	}
5034 done:
5035 	if (err) {
5036 		free(*path);
5037 		*path = NULL;
5038 	}
5039 	return err;
5040 }
5041 
5042 static const struct got_error *
5043 blame_tree_entry(struct tog_view **new_view, int begin_x,
5044     struct got_tree_entry *te, struct tog_parent_trees *parents,
5045     struct got_object_id *commit_id, struct got_repository *repo)
5046 {
5047 	const struct got_error *err = NULL;
5048 	char *path;
5049 	struct tog_view *blame_view;
5050 
5051 	*new_view = NULL;
5052 
5053 	err = tree_entry_path(&path, parents, te);
5054 	if (err)
5055 		return err;
5056 
5057 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
5058 	if (blame_view == NULL) {
5059 		err = got_error_from_errno("view_open");
5060 		goto done;
5061 	}
5062 
5063 	err = open_blame_view(blame_view, path, commit_id, repo);
5064 	if (err) {
5065 		if (err->code == GOT_ERR_CANCELLED)
5066 			err = NULL;
5067 		view_close(blame_view);
5068 	} else
5069 		*new_view = blame_view;
5070 done:
5071 	free(path);
5072 	return err;
5073 }
5074 
5075 static const struct got_error *
5076 log_tree_entry(struct tog_view **new_view, int begin_x,
5077     struct got_tree_entry *te, struct tog_parent_trees *parents,
5078     struct got_object_id *commit_id, struct got_repository *repo)
5079 {
5080 	struct tog_view *log_view;
5081 	const struct got_error *err = NULL;
5082 	char *path;
5083 
5084 	*new_view = NULL;
5085 
5086 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5087 	if (log_view == NULL)
5088 		return got_error_from_errno("view_open");
5089 
5090 	err = tree_entry_path(&path, parents, te);
5091 	if (err)
5092 		return err;
5093 
5094 	err = open_log_view(log_view, commit_id, repo, NULL, path, 0);
5095 	if (err)
5096 		view_close(log_view);
5097 	else
5098 		*new_view = log_view;
5099 	free(path);
5100 	return err;
5101 }
5102 
5103 static const struct got_error *
5104 open_tree_view(struct tog_view *view, struct got_tree_object *root,
5105     struct got_object_id *commit_id, struct got_repository *repo)
5106 {
5107 	const struct got_error *err = NULL;
5108 	char *commit_id_str = NULL;
5109 	struct tog_tree_view_state *s = &view->state.tree;
5110 
5111 	TAILQ_INIT(&s->parents);
5112 
5113 	err = got_object_id_str(&commit_id_str, commit_id);
5114 	if (err != NULL)
5115 		goto done;
5116 
5117 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
5118 		err = got_error_from_errno("asprintf");
5119 		goto done;
5120 	}
5121 
5122 	s->root = s->tree = root;
5123 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
5124 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
5125 	s->commit_id = got_object_id_dup(commit_id);
5126 	if (s->commit_id == NULL) {
5127 		err = got_error_from_errno("got_object_id_dup");
5128 		goto done;
5129 	}
5130 	s->repo = repo;
5131 
5132 	SIMPLEQ_INIT(&s->colors);
5133 
5134 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5135 		err = add_color(&s->colors, "\\$$",
5136 		    TOG_COLOR_TREE_SUBMODULE,
5137 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
5138 		if (err)
5139 			goto done;
5140 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
5141 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
5142 		if (err) {
5143 			free_colors(&s->colors);
5144 			goto done;
5145 		}
5146 		err = add_color(&s->colors, "/$",
5147 		    TOG_COLOR_TREE_DIRECTORY,
5148 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
5149 		if (err) {
5150 			free_colors(&s->colors);
5151 			goto done;
5152 		}
5153 
5154 		err = add_color(&s->colors, "\\*$",
5155 		    TOG_COLOR_TREE_EXECUTABLE,
5156 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
5157 		if (err) {
5158 			free_colors(&s->colors);
5159 			goto done;
5160 		}
5161 
5162 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
5163 		    get_color_value("TOG_COLOR_COMMIT"));
5164 		if (err) {
5165 			free_colors(&s->colors);
5166 			goto done;
5167 		}
5168 	}
5169 
5170 	view->show = show_tree_view;
5171 	view->input = input_tree_view;
5172 	view->close = close_tree_view;
5173 	view->search_start = search_start_tree_view;
5174 	view->search_next = search_next_tree_view;
5175 done:
5176 	free(commit_id_str);
5177 	if (err) {
5178 		free(s->tree_label);
5179 		s->tree_label = NULL;
5180 	}
5181 	return err;
5182 }
5183 
5184 static const struct got_error *
5185 close_tree_view(struct tog_view *view)
5186 {
5187 	struct tog_tree_view_state *s = &view->state.tree;
5188 
5189 	free_colors(&s->colors);
5190 	free(s->tree_label);
5191 	s->tree_label = NULL;
5192 	free(s->commit_id);
5193 	s->commit_id = NULL;
5194 	while (!TAILQ_EMPTY(&s->parents)) {
5195 		struct tog_parent_tree *parent;
5196 		parent = TAILQ_FIRST(&s->parents);
5197 		TAILQ_REMOVE(&s->parents, parent, entry);
5198 		free(parent);
5199 
5200 	}
5201 	if (s->tree != s->root)
5202 		got_object_tree_close(s->tree);
5203 	got_object_tree_close(s->root);
5204 	return NULL;
5205 }
5206 
5207 static const struct got_error *
5208 search_start_tree_view(struct tog_view *view)
5209 {
5210 	struct tog_tree_view_state *s = &view->state.tree;
5211 
5212 	s->matched_entry = NULL;
5213 	return NULL;
5214 }
5215 
5216 static int
5217 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
5218 {
5219 	regmatch_t regmatch;
5220 
5221 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
5222 	    0) == 0;
5223 }
5224 
5225 static const struct got_error *
5226 search_next_tree_view(struct tog_view *view)
5227 {
5228 	struct tog_tree_view_state *s = &view->state.tree;
5229 	struct got_tree_entry *te = NULL;
5230 
5231 	if (!view->searching) {
5232 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5233 		return NULL;
5234 	}
5235 
5236 	if (s->matched_entry) {
5237 		if (view->searching == TOG_SEARCH_FORWARD) {
5238 			if (s->selected_entry)
5239 				te = got_tree_entry_get_next(s->tree,
5240 				    s->selected_entry);
5241 			else
5242 				te = got_object_tree_get_first_entry(s->tree);
5243 		} else {
5244 			if (s->selected_entry == NULL)
5245 				te = got_object_tree_get_last_entry(s->tree);
5246 			else
5247 				te = got_tree_entry_get_prev(s->tree,
5248 				    s->selected_entry);
5249 		}
5250 	} else {
5251 		if (view->searching == TOG_SEARCH_FORWARD)
5252 			te = got_object_tree_get_first_entry(s->tree);
5253 		else
5254 			te = got_object_tree_get_last_entry(s->tree);
5255 	}
5256 
5257 	while (1) {
5258 		if (te == NULL) {
5259 			if (s->matched_entry == NULL) {
5260 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5261 				return NULL;
5262 			}
5263 			if (view->searching == TOG_SEARCH_FORWARD)
5264 				te = got_object_tree_get_first_entry(s->tree);
5265 			else
5266 				te = got_object_tree_get_last_entry(s->tree);
5267 		}
5268 
5269 		if (match_tree_entry(te, &view->regex)) {
5270 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5271 			s->matched_entry = te;
5272 			break;
5273 		}
5274 
5275 		if (view->searching == TOG_SEARCH_FORWARD)
5276 			te = got_tree_entry_get_next(s->tree, te);
5277 		else
5278 			te = got_tree_entry_get_prev(s->tree, te);
5279 	}
5280 
5281 	if (s->matched_entry) {
5282 		s->first_displayed_entry = s->matched_entry;
5283 		s->selected = 0;
5284 	}
5285 
5286 	return NULL;
5287 }
5288 
5289 static const struct got_error *
5290 show_tree_view(struct tog_view *view)
5291 {
5292 	const struct got_error *err = NULL;
5293 	struct tog_tree_view_state *s = &view->state.tree;
5294 	char *parent_path;
5295 
5296 	err = tree_entry_path(&parent_path, &s->parents, NULL);
5297 	if (err)
5298 		return err;
5299 
5300 	err = draw_tree_entries(view, &s->first_displayed_entry,
5301 	    &s->last_displayed_entry, &s->selected_entry,
5302 	    &s->ndisplayed, s->tree_label, s->show_ids, parent_path,
5303 	    s->tree, s->selected, view->nlines, s->tree == s->root,
5304 	    &s->colors, s->repo);
5305 	free(parent_path);
5306 
5307 	view_vborder(view);
5308 	return err;
5309 }
5310 
5311 static const struct got_error *
5312 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
5313     struct tog_view **focus_view, struct tog_view *view, int ch)
5314 {
5315 	const struct got_error *err = NULL;
5316 	struct tog_tree_view_state *s = &view->state.tree;
5317 	struct tog_view *log_view, *ref_view;
5318 	int begin_x = 0;
5319 
5320 	switch (ch) {
5321 	case 'i':
5322 		s->show_ids = !s->show_ids;
5323 		break;
5324 	case 'l':
5325 		if (!s->selected_entry)
5326 			break;
5327 		if (view_is_parent_view(view))
5328 			begin_x = view_split_begin_x(view->begin_x);
5329 		err = log_tree_entry(&log_view, begin_x, s->selected_entry,
5330 		    &s->parents, s->commit_id, s->repo);
5331 		if (view_is_parent_view(view)) {
5332 			err = view_close_child(view);
5333 			if (err)
5334 				return err;
5335 			err = view_set_child(view, log_view);
5336 			if (err) {
5337 				view_close(log_view);
5338 				break;
5339 			}
5340 			*focus_view = log_view;
5341 			view->child_focussed = 1;
5342 		} else
5343 			*new_view = log_view;
5344 		break;
5345 	case 'r':
5346 		if (view_is_parent_view(view))
5347 			begin_x = view_split_begin_x(view->begin_x);
5348 		ref_view = view_open(view->nlines, view->ncols,
5349 		    view->begin_y, begin_x, TOG_VIEW_REF);
5350 		if (ref_view == NULL)
5351 			return got_error_from_errno("view_open");
5352 		err = open_ref_view(ref_view, s->repo);
5353 		if (err) {
5354 			view_close(ref_view);
5355 			return err;
5356 		}
5357 		if (view_is_parent_view(view)) {
5358 			err = view_close_child(view);
5359 			if (err)
5360 				return err;
5361 			err = view_set_child(view, ref_view);
5362 			if (err) {
5363 				view_close(ref_view);
5364 				break;
5365 			}
5366 			*focus_view = ref_view;
5367 			view->child_focussed = 1;
5368 		} else
5369 			*new_view = ref_view;
5370 		break;
5371 	case 'k':
5372 	case KEY_UP:
5373 		if (s->selected > 0) {
5374 			s->selected--;
5375 			break;
5376 		}
5377 		tree_scroll_up(view, 1);
5378 		break;
5379 	case KEY_PPAGE:
5380 	case CTRL('b'):
5381 		if (s->tree == s->root) {
5382 			if (got_object_tree_get_first_entry(s->tree) ==
5383 			    s->first_displayed_entry)
5384 				s->selected = 0;
5385 		} else {
5386 			if (s->first_displayed_entry == NULL)
5387 				s->selected = 0;
5388 		}
5389 		tree_scroll_up(view, MAX(0, view->nlines - 3));
5390 		break;
5391 	case 'j':
5392 	case KEY_DOWN:
5393 		if (s->selected < s->ndisplayed - 1) {
5394 			s->selected++;
5395 			break;
5396 		}
5397 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5398 		    == NULL)
5399 			/* can't scroll any further */
5400 			break;
5401 		tree_scroll_down(view, 1);
5402 		break;
5403 	case KEY_NPAGE:
5404 	case CTRL('f'):
5405 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
5406 		    == NULL) {
5407 			/* can't scroll any further; move cursor down */
5408 			if (s->selected < s->ndisplayed - 1)
5409 				s->selected = s->ndisplayed - 1;
5410 			break;
5411 		}
5412 		tree_scroll_down(view, view->nlines - 3);
5413 		break;
5414 	case KEY_ENTER:
5415 	case '\r':
5416 	case KEY_BACKSPACE:
5417 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
5418 			struct tog_parent_tree *parent;
5419 			/* user selected '..' */
5420 			if (s->tree == s->root)
5421 				break;
5422 			parent = TAILQ_FIRST(&s->parents);
5423 			TAILQ_REMOVE(&s->parents, parent,
5424 			    entry);
5425 			got_object_tree_close(s->tree);
5426 			s->tree = parent->tree;
5427 			s->first_displayed_entry =
5428 			    parent->first_displayed_entry;
5429 			s->selected_entry =
5430 			    parent->selected_entry;
5431 			s->selected = parent->selected;
5432 			free(parent);
5433 		} else if (S_ISDIR(got_tree_entry_get_mode(
5434 		    s->selected_entry))) {
5435 			struct got_tree_object *subtree;
5436 			err = got_object_open_as_tree(&subtree, s->repo,
5437 			    got_tree_entry_get_id(s->selected_entry));
5438 			if (err)
5439 				break;
5440 			err = tree_view_visit_subtree(subtree, s);
5441 			if (err) {
5442 				got_object_tree_close(subtree);
5443 				break;
5444 			}
5445 		} else if (S_ISREG(got_tree_entry_get_mode(
5446 		    s->selected_entry))) {
5447 			struct tog_view *blame_view;
5448 			int begin_x = view_is_parent_view(view) ?
5449 			    view_split_begin_x(view->begin_x) : 0;
5450 
5451 			err = blame_tree_entry(&blame_view, begin_x,
5452 			    s->selected_entry, &s->parents,
5453 			    s->commit_id, s->repo);
5454 			if (err)
5455 				break;
5456 			if (view_is_parent_view(view)) {
5457 				err = view_close_child(view);
5458 				if (err)
5459 					return err;
5460 				err = view_set_child(view, blame_view);
5461 				if (err) {
5462 					view_close(blame_view);
5463 					break;
5464 				}
5465 				*focus_view = blame_view;
5466 				view->child_focussed = 1;
5467 			} else
5468 				*new_view = blame_view;
5469 		}
5470 		break;
5471 	case KEY_RESIZE:
5472 		if (s->selected > view->nlines)
5473 			s->selected = s->ndisplayed - 1;
5474 		break;
5475 	default:
5476 		break;
5477 	}
5478 
5479 	return err;
5480 }
5481 
5482 __dead static void
5483 usage_tree(void)
5484 {
5485 	endwin();
5486 	fprintf(stderr, "usage: %s tree [-c commit] [-r repository-path] [path]\n",
5487 	    getprogname());
5488 	exit(1);
5489 }
5490 
5491 static const struct got_error *
5492 cmd_tree(int argc, char *argv[])
5493 {
5494 	const struct got_error *error;
5495 	struct got_repository *repo = NULL;
5496 	struct got_worktree *worktree = NULL;
5497 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
5498 	struct got_object_id *commit_id = NULL;
5499 	char *commit_id_arg = NULL;
5500 	struct got_commit_object *commit = NULL;
5501 	struct got_tree_object *tree = NULL;
5502 	int ch;
5503 	struct tog_view *view;
5504 
5505 #ifndef PROFILE
5506 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
5507 	    NULL) == -1)
5508 		err(1, "pledge");
5509 #endif
5510 
5511 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
5512 		switch (ch) {
5513 		case 'c':
5514 			commit_id_arg = optarg;
5515 			break;
5516 		case 'r':
5517 			repo_path = realpath(optarg, NULL);
5518 			if (repo_path == NULL)
5519 				return got_error_from_errno2("realpath",
5520 				    optarg);
5521 			break;
5522 		default:
5523 			usage_tree();
5524 			/* NOTREACHED */
5525 		}
5526 	}
5527 
5528 	argc -= optind;
5529 	argv += optind;
5530 
5531 	if (argc > 1)
5532 		usage_tree();
5533 
5534 	cwd = getcwd(NULL, 0);
5535 	if (cwd == NULL)
5536 		return got_error_from_errno("getcwd");
5537 
5538 	error = got_worktree_open(&worktree, cwd);
5539 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
5540 		goto done;
5541 
5542 	if (repo_path == NULL) {
5543 		if (worktree)
5544 			repo_path =
5545 			    strdup(got_worktree_get_repo_path(worktree));
5546 		else
5547 			repo_path = strdup(cwd);
5548 	}
5549 	if (repo_path == NULL) {
5550 		error = got_error_from_errno("strdup");
5551 		goto done;
5552 	}
5553 
5554 	error = got_repo_open(&repo, repo_path, NULL);
5555 	if (error != NULL)
5556 		goto done;
5557 
5558 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
5559 	    repo, worktree);
5560 	if (error)
5561 		goto done;
5562 
5563 	init_curses();
5564 
5565 	error = apply_unveil(got_repo_get_path(repo), NULL);
5566 	if (error)
5567 		goto done;
5568 
5569 	error = got_repo_match_object_id(&commit_id, NULL,
5570 	    commit_id_arg ? commit_id_arg : GOT_REF_HEAD,
5571 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
5572 	if (error)
5573 		goto done;
5574 
5575 	error = got_object_open_as_commit(&commit, repo, commit_id);
5576 	if (error)
5577 		goto done;
5578 
5579 	error = got_object_open_as_tree(&tree, repo,
5580 	    got_object_commit_get_tree_id(commit));
5581 	if (error)
5582 		goto done;
5583 
5584 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
5585 	if (view == NULL) {
5586 		error = got_error_from_errno("view_open");
5587 		goto done;
5588 	}
5589 	error = open_tree_view(view, tree, commit_id, repo);
5590 	if (error)
5591 		goto done;
5592 	if (!got_path_is_root_dir(in_repo_path)) {
5593 		error = tree_view_walk_path(&view->state.tree, commit_id,
5594 		    in_repo_path, repo);
5595 		if (error)
5596 			goto done;
5597 	}
5598 
5599 	if (worktree) {
5600 		/* Release work tree lock. */
5601 		got_worktree_close(worktree);
5602 		worktree = NULL;
5603 	}
5604 	error = view_loop(view);
5605 done:
5606 	free(repo_path);
5607 	free(cwd);
5608 	free(commit_id);
5609 	if (commit)
5610 		got_object_commit_close(commit);
5611 	if (tree)
5612 		got_object_tree_close(tree);
5613 	if (repo)
5614 		got_repo_close(repo);
5615 	return error;
5616 }
5617 
5618 static const struct got_error *
5619 ref_view_load_refs(struct tog_ref_view_state *s)
5620 {
5621 	const struct got_error *err;
5622 	struct got_reflist_entry *sre;
5623 	struct tog_reflist_entry *re;
5624 
5625 	err = got_ref_list(&s->simplerefs, s->repo, NULL,
5626 	    got_ref_cmp_by_name, NULL);
5627 	if (err)
5628 		return err;
5629 
5630 	s->nrefs = 0;
5631 	SIMPLEQ_FOREACH(sre, &s->simplerefs, entry) {
5632 		if (strncmp(got_ref_get_name(sre->ref), "refs/got/", 9) == 0)
5633 			continue;
5634 
5635 		re = malloc(sizeof(*re));
5636 		if (re == NULL)
5637 			return got_error_from_errno("malloc");
5638 
5639 		re->ref = sre->ref;
5640 		re->idx = s->nrefs++;
5641 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
5642 	}
5643 
5644 	return NULL;
5645 }
5646 
5647 void
5648 ref_view_free_refs(struct tog_ref_view_state *s)
5649 {
5650 	struct tog_reflist_entry *re;
5651 
5652 	while (!TAILQ_EMPTY(&s->refs)) {
5653 		re = TAILQ_FIRST(&s->refs);
5654 		TAILQ_REMOVE(&s->refs, re, entry);
5655 		free(re);
5656 	}
5657 	got_ref_list_free(&s->simplerefs);
5658 }
5659 
5660 static const struct got_error *
5661 open_ref_view(struct tog_view *view, struct got_repository *repo)
5662 {
5663 	const struct got_error *err = NULL;
5664 	struct tog_ref_view_state *s = &view->state.ref;
5665 
5666 	s->selected_entry = 0;
5667 	s->repo = repo;
5668 
5669 	SIMPLEQ_INIT(&s->simplerefs);
5670 	TAILQ_INIT(&s->refs);
5671 	SIMPLEQ_INIT(&s->colors);
5672 
5673 	err = ref_view_load_refs(s);
5674 	if (err)
5675 		return err;
5676 
5677 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
5678 
5679 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5680 		err = add_color(&s->colors, "^refs/heads/",
5681 		    TOG_COLOR_REFS_HEADS,
5682 		    get_color_value("TOG_COLOR_REFS_HEADS"));
5683 		if (err)
5684 			goto done;
5685 
5686 		err = add_color(&s->colors, "^refs/tags/",
5687 		    TOG_COLOR_REFS_TAGS,
5688 		    get_color_value("TOG_COLOR_REFS_TAGS"));
5689 		if (err)
5690 			goto done;
5691 
5692 		err = add_color(&s->colors, "^refs/remotes/",
5693 		    TOG_COLOR_REFS_REMOTES,
5694 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
5695 		if (err)
5696 			goto done;
5697 	}
5698 
5699 	view->show = show_ref_view;
5700 	view->input = input_ref_view;
5701 	view->close = close_ref_view;
5702 	view->search_start = search_start_ref_view;
5703 	view->search_next = search_next_ref_view;
5704 done:
5705 	if (err)
5706 		free_colors(&s->colors);
5707 	return err;
5708 }
5709 
5710 static const struct got_error *
5711 close_ref_view(struct tog_view *view)
5712 {
5713 	struct tog_ref_view_state *s = &view->state.ref;
5714 
5715 	ref_view_free_refs(s);
5716 	free_colors(&s->colors);
5717 
5718 	return NULL;
5719 }
5720 
5721 static const struct got_error *
5722 resolve_reflist_entry(struct got_object_id **commit_id,
5723     struct tog_reflist_entry *re, struct got_repository *repo)
5724 {
5725 	const struct got_error *err = NULL;
5726 	struct got_object_id *obj_id;
5727 	struct got_tag_object *tag = NULL;
5728 	int obj_type;
5729 
5730 	*commit_id = NULL;
5731 
5732 	err = got_ref_resolve(&obj_id, repo, re->ref);
5733 	if (err)
5734 		return err;
5735 
5736 	err = got_object_get_type(&obj_type, repo, obj_id);
5737 	if (err)
5738 		goto done;
5739 
5740 	switch (obj_type) {
5741 	case GOT_OBJ_TYPE_COMMIT:
5742 		*commit_id = obj_id;
5743 		break;
5744 	case GOT_OBJ_TYPE_TAG:
5745 		err = got_object_open_as_tag(&tag, repo, obj_id);
5746 		if (err)
5747 			goto done;
5748 		free(obj_id);
5749 		err = got_object_get_type(&obj_type, repo,
5750 		    got_object_tag_get_object_id(tag));
5751 		if (err)
5752 			goto done;
5753 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
5754 			err = got_error(GOT_ERR_OBJ_TYPE);
5755 			goto done;
5756 		}
5757 		*commit_id = got_object_id_dup(
5758 		    got_object_tag_get_object_id(tag));
5759 		if (*commit_id == NULL) {
5760 			err = got_error_from_errno("got_object_id_dup");
5761 			goto done;
5762 		}
5763 		break;
5764 	default:
5765 		err = got_error(GOT_ERR_OBJ_TYPE);
5766 		break;
5767 	}
5768 
5769 done:
5770 	if (tag)
5771 		got_object_tag_close(tag);
5772 	if (err) {
5773 		free(*commit_id);
5774 		*commit_id = NULL;
5775 	}
5776 	return err;
5777 }
5778 
5779 static const struct got_error *
5780 log_ref_entry(struct tog_view **new_view, int begin_x,
5781     struct tog_reflist_entry *re, struct got_repository *repo)
5782 {
5783 	struct tog_view *log_view;
5784 	const struct got_error *err = NULL;
5785 	struct got_object_id *commit_id = NULL;
5786 
5787 	*new_view = NULL;
5788 
5789 	err = resolve_reflist_entry(&commit_id, re, repo);
5790 	if (err) {
5791 		if (err->code != GOT_ERR_OBJ_TYPE)
5792 			return err;
5793 		else
5794 			return NULL;
5795 	}
5796 
5797 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
5798 	if (log_view == NULL) {
5799 		err = got_error_from_errno("view_open");
5800 		goto done;
5801 	}
5802 
5803 	err = open_log_view(log_view, commit_id, repo, NULL, "", 0);
5804 done:
5805 	if (err)
5806 		view_close(log_view);
5807 	else
5808 		*new_view = log_view;
5809 	free(commit_id);
5810 	return err;
5811 }
5812 
5813 static void
5814 ref_scroll_up(struct tog_view *view, int maxscroll)
5815 {
5816 	struct tog_ref_view_state *s = &view->state.ref;
5817 	struct tog_reflist_entry *re;
5818 	int i = 0;
5819 
5820 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
5821 		return;
5822 
5823 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
5824 	while (i++ < maxscroll) {
5825 		if (re == NULL)
5826 			break;
5827 		s->first_displayed_entry = re;
5828 		re = TAILQ_PREV(re, tog_reflist_head, entry);
5829 	}
5830 }
5831 
5832 static void
5833 ref_scroll_down(struct tog_view *view, int maxscroll)
5834 {
5835 	struct tog_ref_view_state *s = &view->state.ref;
5836 	struct tog_reflist_entry *next, *last;
5837 	int n = 0;
5838 
5839 	if (s->first_displayed_entry)
5840 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
5841 	else
5842 		next = TAILQ_FIRST(&s->refs);
5843 
5844 	last = s->last_displayed_entry;
5845 	while (next && last && n++ < maxscroll) {
5846 		last = TAILQ_NEXT(last, entry);
5847 		if (last) {
5848 			s->first_displayed_entry = next;
5849 			next = TAILQ_NEXT(next, entry);
5850 		}
5851 	}
5852 }
5853 
5854 static const struct got_error *
5855 search_start_ref_view(struct tog_view *view)
5856 {
5857 	struct tog_ref_view_state *s = &view->state.ref;
5858 
5859 	s->matched_entry = NULL;
5860 	return NULL;
5861 }
5862 
5863 static int
5864 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
5865 {
5866 	regmatch_t regmatch;
5867 
5868 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
5869 	    0) == 0;
5870 }
5871 
5872 static const struct got_error *
5873 search_next_ref_view(struct tog_view *view)
5874 {
5875 	struct tog_ref_view_state *s = &view->state.ref;
5876 	struct tog_reflist_entry *re = NULL;
5877 
5878 	if (!view->searching) {
5879 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5880 		return NULL;
5881 	}
5882 
5883 	if (s->matched_entry) {
5884 		if (view->searching == TOG_SEARCH_FORWARD) {
5885 			if (s->selected_entry)
5886 				re = TAILQ_NEXT(s->selected_entry, entry);
5887 			else
5888 				re = TAILQ_PREV(s->selected_entry,
5889 				    tog_reflist_head, entry);
5890 		} else {
5891 			if (s->selected_entry == NULL)
5892 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5893 			else
5894 				re = TAILQ_PREV(s->selected_entry,
5895 				    tog_reflist_head, entry);
5896 		}
5897 	} else {
5898 		if (view->searching == TOG_SEARCH_FORWARD)
5899 			re = TAILQ_FIRST(&s->refs);
5900 		else
5901 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
5902 	}
5903 
5904 	while (1) {
5905 		if (re == NULL) {
5906 			if (s->matched_entry == NULL) {
5907 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5908 				return NULL;
5909 			}
5910 			if (view->searching == TOG_SEARCH_FORWARD)
5911 				re = TAILQ_FIRST(&s->refs);
5912 			else
5913 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
5914 		}
5915 
5916 		if (match_reflist_entry(re, &view->regex)) {
5917 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
5918 			s->matched_entry = re;
5919 			break;
5920 		}
5921 
5922 		if (view->searching == TOG_SEARCH_FORWARD)
5923 			re = TAILQ_NEXT(re, entry);
5924 		else
5925 			re = TAILQ_PREV(re, tog_reflist_head, entry);
5926 	}
5927 
5928 	if (s->matched_entry) {
5929 		s->first_displayed_entry = s->matched_entry;
5930 		s->selected = 0;
5931 	}
5932 
5933 	return NULL;
5934 }
5935 
5936 static const struct got_error *
5937 show_ref_view(struct tog_view *view)
5938 {
5939 	const struct got_error *err = NULL;
5940 	struct tog_ref_view_state *s = &view->state.ref;
5941 	struct tog_reflist_entry *re;
5942 	char *line = NULL;
5943 	wchar_t *wline;
5944 	struct tog_color *tc;
5945 	int width, n;
5946 	int limit = view->nlines;
5947 
5948 	werase(view->window);
5949 
5950 	s->ndisplayed = 0;
5951 
5952 	if (limit == 0)
5953 		return NULL;
5954 
5955 	re = s->first_displayed_entry;
5956 
5957 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
5958 	    s->nrefs) == -1)
5959 		return got_error_from_errno("asprintf");
5960 
5961 	err = format_line(&wline, &width, line, view->ncols, 0);
5962 	if (err) {
5963 		free(line);
5964 		return err;
5965 	}
5966 	if (view_needs_focus_indication(view))
5967 		wstandout(view->window);
5968 	waddwstr(view->window, wline);
5969 	if (view_needs_focus_indication(view))
5970 		wstandend(view->window);
5971 	free(wline);
5972 	wline = NULL;
5973 	free(line);
5974 	line = NULL;
5975 	if (width < view->ncols - 1)
5976 		waddch(view->window, '\n');
5977 	if (--limit <= 0)
5978 		return NULL;
5979 
5980 	n = 0;
5981 	while (re && limit > 0) {
5982 		char *line = NULL;
5983 
5984 		if (got_ref_is_symbolic(re->ref)) {
5985 			if (asprintf(&line, "%s -> %s",
5986 			    got_ref_get_name(re->ref),
5987 			    got_ref_get_symref_target(re->ref)) == -1)
5988 				return got_error_from_errno("asprintf");
5989 		} else if (s->show_ids) {
5990 			struct got_object_id *id;
5991 			char *id_str;
5992 			err = got_ref_resolve(&id, s->repo, re->ref);
5993 			if (err)
5994 				return err;
5995 			err = got_object_id_str(&id_str, id);
5996 			if (err) {
5997 				free(id);
5998 				return err;
5999 			}
6000 			if (asprintf(&line, "%s: %s",
6001 			    got_ref_get_name(re->ref), id_str) == -1) {
6002 				err = got_error_from_errno("asprintf");
6003 				free(id);
6004 				free(id_str);
6005 				return err;
6006 			}
6007 			free(id);
6008 			free(id_str);
6009 		} else {
6010 			line = strdup(got_ref_get_name(re->ref));
6011 			if (line == NULL)
6012 				return got_error_from_errno("strdup");
6013 		}
6014 
6015 		err = format_line(&wline, &width, line, view->ncols, 0);
6016 		if (err) {
6017 			free(line);
6018 			return err;
6019 		}
6020 		if (n == s->selected) {
6021 			if (view->focussed)
6022 				wstandout(view->window);
6023 			s->selected_entry = re;
6024 		}
6025 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
6026 		if (tc)
6027 			wattr_on(view->window,
6028 			    COLOR_PAIR(tc->colorpair), NULL);
6029 		waddwstr(view->window, wline);
6030 		if (tc)
6031 			wattr_off(view->window,
6032 			    COLOR_PAIR(tc->colorpair), NULL);
6033 		if (width < view->ncols - 1)
6034 			waddch(view->window, '\n');
6035 		if (n == s->selected && view->focussed)
6036 			wstandend(view->window);
6037 		free(line);
6038 		free(wline);
6039 		wline = NULL;
6040 		n++;
6041 		s->ndisplayed++;
6042 		s->last_displayed_entry = re;
6043 
6044 		limit--;
6045 		re = TAILQ_NEXT(re, entry);
6046 	}
6047 
6048 	view_vborder(view);
6049 	return err;
6050 }
6051 
6052 static const struct got_error *
6053 browse_ref_tree(struct tog_view **new_view, int begin_x,
6054     struct tog_reflist_entry *re, struct got_repository *repo)
6055 {
6056 	const struct got_error *err = NULL;
6057 	struct got_object_id *commit_id = NULL, *tree_id = NULL;
6058 	struct got_tree_object *tree = NULL;
6059 	struct tog_view *tree_view;
6060 
6061 	*new_view = NULL;
6062 
6063 	err = resolve_reflist_entry(&commit_id, re, repo);
6064 	if (err) {
6065 		if (err->code != GOT_ERR_OBJ_TYPE)
6066 			return err;
6067 		else
6068 			return NULL;
6069 	}
6070 
6071 	err = got_object_id_by_path(&tree_id, repo, commit_id, "/");
6072 	if (err)
6073 		goto done;
6074 
6075 	err = got_object_open_as_tree(&tree, repo, tree_id);
6076 	if (err)
6077 		goto done;
6078 
6079 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
6080 	if (tree_view == NULL) {
6081 		err = got_error_from_errno("view_open");
6082 		goto done;
6083 	}
6084 
6085 	err = open_tree_view(tree_view, tree, commit_id, repo);
6086 	if (err)
6087 		goto done;
6088 
6089 	*new_view = tree_view;
6090 done:
6091 	free(commit_id);
6092 	free(tree_id);
6093 	if (err) {
6094 		if (tree)
6095 			got_object_tree_close(tree);
6096 	}
6097 	return err;
6098 }
6099 static const struct got_error *
6100 input_ref_view(struct tog_view **new_view, struct tog_view **dead_view,
6101     struct tog_view **focus_view, struct tog_view *view, int ch)
6102 {
6103 	const struct got_error *err = NULL;
6104 	struct tog_ref_view_state *s = &view->state.ref;
6105 	struct tog_view *log_view, *tree_view;
6106 	int begin_x = 0;
6107 
6108 	switch (ch) {
6109 	case 'i':
6110 		s->show_ids = !s->show_ids;
6111 		break;
6112 	case KEY_ENTER:
6113 	case '\r':
6114 		if (!s->selected_entry)
6115 			break;
6116 		if (view_is_parent_view(view))
6117 			begin_x = view_split_begin_x(view->begin_x);
6118 		err = log_ref_entry(&log_view, begin_x, s->selected_entry,
6119 		    s->repo);
6120 		if (view_is_parent_view(view)) {
6121 			err = view_close_child(view);
6122 			if (err)
6123 				return err;
6124 			err = view_set_child(view, log_view);
6125 			if (err) {
6126 				view_close(log_view);
6127 				break;
6128 			}
6129 			*focus_view = log_view;
6130 			view->child_focussed = 1;
6131 		} else
6132 			*new_view = log_view;
6133 		break;
6134 	case 't':
6135 		if (!s->selected_entry)
6136 			break;
6137 		if (view_is_parent_view(view))
6138 			begin_x = view_split_begin_x(view->begin_x);
6139 		err = browse_ref_tree(&tree_view, begin_x, s->selected_entry,
6140 		    s->repo);
6141 		if (err || tree_view == NULL)
6142 			break;
6143 		if (view_is_parent_view(view)) {
6144 			err = view_close_child(view);
6145 			if (err)
6146 				return err;
6147 			err = view_set_child(view, tree_view);
6148 			if (err) {
6149 				view_close(tree_view);
6150 				break;
6151 			}
6152 			*focus_view = tree_view;
6153 			view->child_focussed = 1;
6154 		} else
6155 			*new_view = tree_view;
6156 		break;
6157 	case 'k':
6158 	case KEY_UP:
6159 		if (s->selected > 0) {
6160 			s->selected--;
6161 			break;
6162 		}
6163 		ref_scroll_up(view, 1);
6164 		break;
6165 	case KEY_PPAGE:
6166 	case CTRL('b'):
6167 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
6168 			s->selected = 0;
6169 		ref_scroll_up(view, MAX(0, view->nlines - 1));
6170 		break;
6171 	case 'j':
6172 	case KEY_DOWN:
6173 		if (s->selected < s->ndisplayed - 1) {
6174 			s->selected++;
6175 			break;
6176 		}
6177 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL)
6178 			/* can't scroll any further */
6179 			break;
6180 		ref_scroll_down(view, 1);
6181 		break;
6182 	case KEY_NPAGE:
6183 	case CTRL('f'):
6184 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
6185 			/* can't scroll any further; move cursor down */
6186 			if (s->selected < s->ndisplayed - 1)
6187 				s->selected = s->ndisplayed - 1;
6188 			break;
6189 		}
6190 		ref_scroll_down(view, view->nlines - 1);
6191 		break;
6192 	case CTRL('l'):
6193 		ref_view_free_refs(s);
6194 		err = ref_view_load_refs(s);
6195 		break;
6196 	case KEY_RESIZE:
6197 		if (s->selected > view->nlines)
6198 			s->selected = s->ndisplayed - 1;
6199 		break;
6200 	default:
6201 		break;
6202 	}
6203 
6204 	return err;
6205 }
6206 
6207 __dead static void
6208 usage_ref(void)
6209 {
6210 	endwin();
6211 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
6212 	    getprogname());
6213 	exit(1);
6214 }
6215 
6216 static const struct got_error *
6217 cmd_ref(int argc, char *argv[])
6218 {
6219 	const struct got_error *error;
6220 	struct got_repository *repo = NULL;
6221 	struct got_worktree *worktree = NULL;
6222 	char *cwd = NULL, *repo_path = NULL;
6223 	int ch;
6224 	struct tog_view *view;
6225 
6226 #ifndef PROFILE
6227 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
6228 	    NULL) == -1)
6229 		err(1, "pledge");
6230 #endif
6231 
6232 	while ((ch = getopt(argc, argv, "r:")) != -1) {
6233 		switch (ch) {
6234 		case 'r':
6235 			repo_path = realpath(optarg, NULL);
6236 			if (repo_path == NULL)
6237 				return got_error_from_errno2("realpath",
6238 				    optarg);
6239 			break;
6240 		default:
6241 			usage_ref();
6242 			/* NOTREACHED */
6243 		}
6244 	}
6245 
6246 	argc -= optind;
6247 	argv += optind;
6248 
6249 	if (argc > 1)
6250 		usage_ref();
6251 
6252 	cwd = getcwd(NULL, 0);
6253 	if (cwd == NULL)
6254 		return got_error_from_errno("getcwd");
6255 
6256 	error = got_worktree_open(&worktree, cwd);
6257 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6258 		goto done;
6259 
6260 	if (repo_path == NULL) {
6261 		if (worktree)
6262 			repo_path =
6263 			    strdup(got_worktree_get_repo_path(worktree));
6264 		else
6265 			repo_path = strdup(cwd);
6266 	}
6267 	if (repo_path == NULL) {
6268 		error = got_error_from_errno("strdup");
6269 		goto done;
6270 	}
6271 
6272 	error = got_repo_open(&repo, repo_path, NULL);
6273 	if (error != NULL)
6274 		goto done;
6275 
6276 	init_curses();
6277 
6278 	error = apply_unveil(got_repo_get_path(repo), NULL);
6279 	if (error)
6280 		goto done;
6281 
6282 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
6283 	if (view == NULL) {
6284 		error = got_error_from_errno("view_open");
6285 		goto done;
6286 	}
6287 
6288 	error = open_ref_view(view, repo);
6289 	if (error)
6290 		goto done;
6291 
6292 	if (worktree) {
6293 		/* Release work tree lock. */
6294 		got_worktree_close(worktree);
6295 		worktree = NULL;
6296 	}
6297 	error = view_loop(view);
6298 done:
6299 	free(repo_path);
6300 	free(cwd);
6301 	if (repo)
6302 		got_repo_close(repo);
6303 	return error;
6304 }
6305 
6306 static void
6307 list_commands(FILE *fp)
6308 {
6309 	int i;
6310 
6311 	fprintf(fp, "commands:");
6312 	for (i = 0; i < nitems(tog_commands); i++) {
6313 		struct tog_cmd *cmd = &tog_commands[i];
6314 		fprintf(fp, " %s", cmd->name);
6315 	}
6316 	fputc('\n', fp);
6317 }
6318 
6319 __dead static void
6320 usage(int hflag, int status)
6321 {
6322 	FILE *fp = (status == 0) ? stdout : stderr;
6323 
6324 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
6325 	    getprogname());
6326 	if (hflag) {
6327 		fprintf(fp, "lazy usage: %s path\n", getprogname());
6328 		list_commands(fp);
6329 	}
6330 	exit(status);
6331 }
6332 
6333 static char **
6334 make_argv(int argc, ...)
6335 {
6336 	va_list ap;
6337 	char **argv;
6338 	int i;
6339 
6340 	va_start(ap, argc);
6341 
6342 	argv = calloc(argc, sizeof(char *));
6343 	if (argv == NULL)
6344 		err(1, "calloc");
6345 	for (i = 0; i < argc; i++) {
6346 		argv[i] = strdup(va_arg(ap, char *));
6347 		if (argv[i] == NULL)
6348 			err(1, "strdup");
6349 	}
6350 
6351 	va_end(ap);
6352 	return argv;
6353 }
6354 
6355 /*
6356  * Try to convert 'tog path' into a 'tog log path' command.
6357  * The user could simply have mistyped the command rather than knowingly
6358  * provided a path. So check whether argv[0] can in fact be resolved
6359  * to a path in the HEAD commit and print a special error if not.
6360  * This hack is for mpi@ <3
6361  */
6362 static const struct got_error *
6363 tog_log_with_path(int argc, char *argv[])
6364 {
6365 	const struct got_error *error = NULL;
6366 	struct tog_cmd *cmd = NULL;
6367 	struct got_repository *repo = NULL;
6368 	struct got_worktree *worktree = NULL;
6369 	struct got_object_id *commit_id = NULL, *id = NULL;
6370 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6371 	char *commit_id_str = NULL, **cmd_argv = NULL;
6372 
6373 	cwd = getcwd(NULL, 0);
6374 	if (cwd == NULL)
6375 		return got_error_from_errno("getcwd");
6376 
6377 	error = got_worktree_open(&worktree, cwd);
6378 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
6379 		goto done;
6380 
6381 	if (worktree)
6382 		repo_path = strdup(got_worktree_get_repo_path(worktree));
6383 	else
6384 		repo_path = strdup(cwd);
6385 	if (repo_path == NULL) {
6386 		error = got_error_from_errno("strdup");
6387 		goto done;
6388 	}
6389 
6390 	error = got_repo_open(&repo, repo_path, NULL);
6391 	if (error != NULL)
6392 		goto done;
6393 
6394 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
6395 	    repo, worktree);
6396 	if (error)
6397 		goto done;
6398 
6399 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
6400 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
6401 	    GOT_OBJ_TYPE_COMMIT, 1, repo);
6402 	if (error)
6403 		goto done;
6404 
6405 	if (worktree) {
6406 		got_worktree_close(worktree);
6407 		worktree = NULL;
6408 	}
6409 
6410 	error = got_object_id_by_path(&id, repo, commit_id, in_repo_path);
6411 	if (error) {
6412 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
6413 			goto done;
6414 		fprintf(stderr, "%s: '%s' is no known command or path\n",
6415 		    getprogname(), argv[0]);
6416 		usage(1, 1);
6417 		/* not reached */
6418 	}
6419 
6420 	got_repo_close(repo);
6421 	repo = NULL;
6422 
6423 	error = got_object_id_str(&commit_id_str, commit_id);
6424 	if (error)
6425 		goto done;
6426 
6427 	cmd = &tog_commands[0]; /* log */
6428 	argc = 4;
6429 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
6430 	error = cmd->cmd_main(argc, cmd_argv);
6431 done:
6432 	if (repo)
6433 		got_repo_close(repo);
6434 	if (worktree)
6435 		got_worktree_close(worktree);
6436 	free(id);
6437 	free(commit_id_str);
6438 	free(commit_id);
6439 	free(cwd);
6440 	free(repo_path);
6441 	free(in_repo_path);
6442 	if (cmd_argv) {
6443 		int i;
6444 		for (i = 0; i < argc; i++)
6445 			free(cmd_argv[i]);
6446 		free(cmd_argv);
6447 	}
6448 	return error;
6449 }
6450 
6451 int
6452 main(int argc, char *argv[])
6453 {
6454 	const struct got_error *error = NULL;
6455 	struct tog_cmd *cmd = NULL;
6456 	int ch, hflag = 0, Vflag = 0;
6457 	char **cmd_argv = NULL;
6458 	static struct option longopts[] = {
6459 	    { "version", no_argument, NULL, 'V' },
6460 	    { NULL, 0, NULL, 0}
6461 	};
6462 
6463 	setlocale(LC_CTYPE, "");
6464 
6465 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
6466 		switch (ch) {
6467 		case 'h':
6468 			hflag = 1;
6469 			break;
6470 		case 'V':
6471 			Vflag = 1;
6472 			break;
6473 		default:
6474 			usage(hflag, 1);
6475 			/* NOTREACHED */
6476 		}
6477 	}
6478 
6479 	argc -= optind;
6480 	argv += optind;
6481 	optind = 1;
6482 	optreset = 1;
6483 
6484 	if (Vflag) {
6485 		got_version_print_str();
6486 		return 0;
6487 	}
6488 
6489 	if (argc == 0) {
6490 		if (hflag)
6491 			usage(hflag, 0);
6492 		/* Build an argument vector which runs a default command. */
6493 		cmd = &tog_commands[0];
6494 		argc = 1;
6495 		cmd_argv = make_argv(argc, cmd->name);
6496 	} else {
6497 		int i;
6498 
6499 		/* Did the user specify a command? */
6500 		for (i = 0; i < nitems(tog_commands); i++) {
6501 			if (strncmp(tog_commands[i].name, argv[0],
6502 			    strlen(argv[0])) == 0) {
6503 				cmd = &tog_commands[i];
6504 				break;
6505 			}
6506 		}
6507 	}
6508 
6509 	if (cmd == NULL) {
6510 		if (argc != 1)
6511 			usage(0, 1);
6512 		/* No command specified; try log with a path */
6513 		error = tog_log_with_path(argc, argv);
6514 	} else {
6515 		if (hflag)
6516 			cmd->cmd_usage();
6517 		else
6518 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
6519 	}
6520 
6521 	endwin();
6522 	putchar('\n');
6523 	if (cmd_argv) {
6524 		int i;
6525 		for (i = 0; i < argc; i++)
6526 			free(cmd_argv[i]);
6527 		free(cmd_argv);
6528 	}
6529 
6530 	if (error && error->code != GOT_ERR_CANCELLED)
6531 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
6532 	return 0;
6533 }