1 /*
2  * Copyright (c) 2018, 2019 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 <errno.h>
22 #define _XOPEN_SOURCE_EXTENDED
23 #include <curses.h>
24 #undef _XOPEN_SOURCE_EXTENDED
25 #include <panel.h>
26 #include <locale.h>
27 #include <stdlib.h>
28 #include <stdio.h>
29 #include <getopt.h>
30 #include <string.h>
31 #include <err.h>
32 #include <unistd.h>
33 #include <util.h>
34 #include <limits.h>
35 #include <wchar.h>
36 #include <time.h>
37 #include <pthread.h>
38 #include <libgen.h>
39 #include <regex.h>
40 
41 #include "got_error.h"
42 #include "got_object.h"
43 #include "got_reference.h"
44 #include "got_repository.h"
45 #include "got_diff.h"
46 #include "got_opentemp.h"
47 #include "got_commit_graph.h"
48 #include "got_utf8.h"
49 #include "got_blame.h"
50 #include "got_privsep.h"
51 #include "got_path.h"
52 #include "got_worktree.h"
53 
54 #ifndef MIN
55 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
56 #endif
57 
58 #ifndef MAX
59 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
60 #endif
61 
62 #define CTRL(x)		((x) & 0x1f)
63 
64 #ifndef nitems
65 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
66 #endif
67 
68 struct tog_cmd {
69 	const char *name;
70 	const struct got_error *(*cmd_main)(int, char *[]);
71 	void (*cmd_usage)(void);
72 	const char *descr;
73 };
74 
75 __dead static void	usage(void);
76 __dead static void	usage_log(void);
77 __dead static void	usage_diff(void);
78 __dead static void	usage_blame(void);
79 __dead static void	usage_tree(void);
80 
81 static const struct got_error*	cmd_log(int, char *[]);
82 static const struct got_error*	cmd_diff(int, char *[]);
83 static const struct got_error*	cmd_blame(int, char *[]);
84 static const struct got_error*	cmd_tree(int, char *[]);
85 
86 static struct tog_cmd tog_commands[] = {
87 	{ "log",	cmd_log,	usage_log,
88 	    "show repository history" },
89 	{ "diff",	cmd_diff,	usage_diff,
90 	    "compare files and directories" },
91 	{ "blame",	cmd_blame,	usage_blame,
92 	    "show line-by-line file history" },
93 	{ "tree",	cmd_tree,	usage_tree,
94 	    "browse trees in repository" },
95 };
96 
97 enum tog_view_type {
98 	TOG_VIEW_DIFF,
99 	TOG_VIEW_LOG,
100 	TOG_VIEW_BLAME,
101 	TOG_VIEW_TREE
102 };
103 
104 #define TOG_EOF_STRING	"(END)"
105 
106 struct commit_queue_entry {
107 	TAILQ_ENTRY(commit_queue_entry) entry;
108 	struct got_object_id *id;
109 	struct got_commit_object *commit;
110 	int idx;
111 };
112 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
113 struct commit_queue {
114 	int ncommits;
115 	struct commit_queue_head head;
116 };
117 
118 struct tog_diff_view_state {
119 	struct got_object_id *id1, *id2;
120 	FILE *f;
121 	int first_displayed_line;
122 	int last_displayed_line;
123 	int eof;
124 	int diff_context;
125 	struct got_repository *repo;
126 	struct got_reflist_head *refs;
127 
128 	/* passed from log view; may be NULL */
129 	struct tog_view *log_view;
130 };
131 
132 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
133 
134 struct tog_log_thread_args {
135 	pthread_cond_t need_commits;
136 	int commits_needed;
137 	struct got_commit_graph *graph;
138 	struct commit_queue *commits;
139 	const char *in_repo_path;
140 	struct got_object_id *start_id;
141 	struct got_repository *repo;
142 	int log_complete;
143 	sig_atomic_t *quit;
144 	struct tog_view *view;
145 	struct commit_queue_entry **first_displayed_entry;
146 	struct commit_queue_entry **selected_entry;
147 };
148 
149 struct tog_log_view_state {
150 	struct commit_queue commits;
151 	struct commit_queue_entry *first_displayed_entry;
152 	struct commit_queue_entry *last_displayed_entry;
153 	struct commit_queue_entry *selected_entry;
154 	int selected;
155 	char *in_repo_path;
156 	struct got_repository *repo;
157 	struct got_reflist_head *refs;
158 	struct got_object_id *start_id;
159 	sig_atomic_t quit;
160 	pthread_t thread;
161 	struct tog_log_thread_args thread_args;
162 
163 	regex_t regex;
164 	struct commit_queue_entry *matched_entry;
165 };
166 
167 struct tog_blame_cb_args {
168 	struct tog_blame_line *lines; /* one per line */
169 	int nlines;
170 
171 	struct tog_view *view;
172 	struct got_object_id *commit_id;
173 	int *quit;
174 };
175 
176 struct tog_blame_thread_args {
177 	const char *path;
178 	struct got_repository *repo;
179 	struct tog_blame_cb_args *cb_args;
180 	int *complete;
181 };
182 
183 struct tog_blame {
184 	FILE *f;
185 	size_t filesize;
186 	struct tog_blame_line *lines;
187 	int nlines;
188 	pthread_t thread;
189 	struct tog_blame_thread_args thread_args;
190 	struct tog_blame_cb_args cb_args;
191 	const char *path;
192 };
193 
194 struct tog_blame_view_state {
195 	int first_displayed_line;
196 	int last_displayed_line;
197 	int selected_line;
198 	int blame_complete;
199 	int eof;
200 	int done;
201 	struct got_object_id_queue blamed_commits;
202 	struct got_object_qid *blamed_commit;
203 	char *path;
204 	struct got_repository *repo;
205 	struct got_reflist_head *refs;
206 	struct got_object_id *commit_id;
207 	struct tog_blame blame;
208 };
209 
210 struct tog_parent_tree {
211 	TAILQ_ENTRY(tog_parent_tree) entry;
212 	struct got_tree_object *tree;
213 	struct got_tree_entry *first_displayed_entry;
214 	struct got_tree_entry *selected_entry;
215 	int selected;
216 };
217 
218 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
219 
220 struct tog_tree_view_state {
221 	char *tree_label;
222 	struct got_tree_object *root;
223 	struct got_tree_object *tree;
224 	const struct got_tree_entries *entries;
225 	struct got_tree_entry *first_displayed_entry;
226 	struct got_tree_entry *last_displayed_entry;
227 	struct got_tree_entry *selected_entry;
228 	int ndisplayed, selected, show_ids;
229 	struct tog_parent_trees parents;
230 	struct got_object_id *commit_id;
231 	struct got_repository *repo;
232 	struct got_reflist_head *refs;
233 };
234 
235 /*
236  * We implement two types of views: parent views and child views.
237  *
238  * The 'Tab' key switches between a parent view and its child view.
239  * Child views are shown side-by-side to their parent view, provided
240  * there is enough screen estate.
241  *
242  * When a new view is opened from within a parent view, this new view
243  * becomes a child view of the parent view, replacing any existing child.
244  *
245  * When a new view is opened from within a child view, this new view
246  * becomes a parent view which will obscure the views below until the
247  * user quits the new parent view by typing 'q'.
248  *
249  * This list of views contains parent views only.
250  * Child views are only pointed to by their parent view.
251  */
252 TAILQ_HEAD(tog_view_list_head, tog_view);
253 
254 struct tog_view {
255 	TAILQ_ENTRY(tog_view) entry;
256 	WINDOW *window;
257 	PANEL *panel;
258 	int nlines, ncols, begin_y, begin_x;
259 	int lines, cols; /* copies of LINES and COLS */
260 	int focussed;
261 	struct tog_view *parent;
262 	struct tog_view *child;
263 	int child_focussed;
264 
265 	/* type-specific state */
266 	enum tog_view_type type;
267 	union {
268 		struct tog_diff_view_state diff;
269 		struct tog_log_view_state log;
270 		struct tog_blame_view_state blame;
271 		struct tog_tree_view_state tree;
272 	} state;
273 
274 	const struct got_error *(*show)(struct tog_view *);
275 	const struct got_error *(*input)(struct tog_view **,
276 	    struct tog_view **, struct tog_view**, struct tog_view *, int);
277 	const struct got_error *(*close)(struct tog_view *);
278 
279 	const struct got_error *(*search_start)(struct tog_view *);
280 	const struct got_error *(*search_next)(struct tog_view *);
281 	int searching;
282 #define TOG_SEARCH_FORWARD	1
283 #define TOG_SEARCH_BACKWARD	2
284 	int search_next_done;
285 };
286 
287 static const struct got_error *open_diff_view(struct tog_view *,
288     struct got_object_id *, struct got_object_id *, struct tog_view *,
289     struct got_reflist_head *, struct got_repository *);
290 static const struct got_error *show_diff_view(struct tog_view *);
291 static const struct got_error *input_diff_view(struct tog_view **,
292     struct tog_view **, struct tog_view **, struct tog_view *, int);
293 static const struct got_error* close_diff_view(struct tog_view *);
294 
295 static const struct got_error *open_log_view(struct tog_view *,
296     struct got_object_id *, struct got_reflist_head *,
297     struct got_repository *, const char *, int);
298 static const struct got_error * show_log_view(struct tog_view *);
299 static const struct got_error *input_log_view(struct tog_view **,
300     struct tog_view **, struct tog_view **, struct tog_view *, int);
301 static const struct got_error *close_log_view(struct tog_view *);
302 static const struct got_error *search_start_log_view(struct tog_view *);
303 static const struct got_error *search_next_log_view(struct tog_view *);
304 
305 static const struct got_error *open_blame_view(struct tog_view *, char *,
306     struct got_object_id *, struct got_reflist_head *, struct got_repository *);
307 static const struct got_error *show_blame_view(struct tog_view *);
308 static const struct got_error *input_blame_view(struct tog_view **,
309     struct tog_view **, struct tog_view **, struct tog_view *, int);
310 static const struct got_error *close_blame_view(struct tog_view *);
311 
312 static const struct got_error *open_tree_view(struct tog_view *,
313     struct got_tree_object *, struct got_object_id *,
314     struct got_reflist_head *, struct got_repository *);
315 static const struct got_error *show_tree_view(struct tog_view *);
316 static const struct got_error *input_tree_view(struct tog_view **,
317     struct tog_view **, struct tog_view **, struct tog_view *, int);
318 static const struct got_error *close_tree_view(struct tog_view *);
319 
320 static volatile sig_atomic_t tog_sigwinch_received;
321 
322 static void
323 tog_sigwinch(int signo)
324 {
325 	tog_sigwinch_received = 1;
326 }
327 
328 static const struct got_error *
329 view_close(struct tog_view *view)
330 {
331 	const struct got_error *err = NULL;
332 
333 	if (view->child) {
334 		view_close(view->child);
335 		view->child = NULL;
336 	}
337 	if (view->close)
338 		err = view->close(view);
339 	if (view->panel)
340 		del_panel(view->panel);
341 	if (view->window)
342 		delwin(view->window);
343 	free(view);
344 	return err;
345 }
346 
347 static struct tog_view *
348 view_open(int nlines, int ncols, int begin_y, int begin_x,
349     enum tog_view_type type)
350 {
351 	struct tog_view *view = calloc(1, sizeof(*view));
352 
353 	if (view == NULL)
354 		return NULL;
355 
356 	view->type = type;
357 	view->lines = LINES;
358 	view->cols = COLS;
359 	view->nlines = nlines ? nlines : LINES - begin_y;
360 	view->ncols = ncols ? ncols : COLS - begin_x;
361 	view->begin_y = begin_y;
362 	view->begin_x = begin_x;
363 	view->window = newwin(nlines, ncols, begin_y, begin_x);
364 	if (view->window == NULL) {
365 		view_close(view);
366 		return NULL;
367 	}
368 	view->panel = new_panel(view->window);
369 	if (view->panel == NULL ||
370 	    set_panel_userptr(view->panel, view) != OK) {
371 		view_close(view);
372 		return NULL;
373 	}
374 
375 	keypad(view->window, TRUE);
376 	return view;
377 }
378 
379 static int
380 view_split_begin_x(int begin_x)
381 {
382 	if (begin_x > 0 || COLS < 120)
383 		return 0;
384 	return (COLS - MAX(COLS / 2, 80));
385 }
386 
387 static const struct got_error *view_resize(struct tog_view *);
388 
389 static const struct got_error *
390 view_splitscreen(struct tog_view *view)
391 {
392 	const struct got_error *err = NULL;
393 
394 	view->begin_y = 0;
395 	view->begin_x = view_split_begin_x(0);
396 	view->nlines = LINES;
397 	view->ncols = COLS - view->begin_x;
398 	view->lines = LINES;
399 	view->cols = COLS;
400 	err = view_resize(view);
401 	if (err)
402 		return err;
403 
404 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
405 		return got_error_from_errno("mvwin");
406 
407 	return NULL;
408 }
409 
410 static const struct got_error *
411 view_fullscreen(struct tog_view *view)
412 {
413 	const struct got_error *err = NULL;
414 
415 	view->begin_x = 0;
416 	view->begin_y = 0;
417 	view->nlines = LINES;
418 	view->ncols = COLS;
419 	view->lines = LINES;
420 	view->cols = COLS;
421 	err = view_resize(view);
422 	if (err)
423 		return err;
424 
425 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
426 		return got_error_from_errno("mvwin");
427 
428 	return NULL;
429 }
430 
431 static int
432 view_is_parent_view(struct tog_view *view)
433 {
434 	return view->parent == NULL;
435 }
436 
437 static const struct got_error *
438 view_resize(struct tog_view *view)
439 {
440 	int nlines, ncols;
441 
442 	if (view->lines > LINES)
443 		nlines = view->nlines - (view->lines - LINES);
444 	else
445 		nlines = view->nlines + (LINES - view->lines);
446 
447 	if (view->cols > COLS)
448 		ncols = view->ncols - (view->cols - COLS);
449 	else
450 		ncols = view->ncols + (COLS - view->cols);
451 
452 	if (wresize(view->window, nlines, ncols) == ERR)
453 		return got_error_from_errno("wresize");
454 	if (replace_panel(view->panel, view->window) == ERR)
455 		return got_error_from_errno("replace_panel");
456 	wclear(view->window);
457 
458 	view->nlines = nlines;
459 	view->ncols = ncols;
460 	view->lines = LINES;
461 	view->cols = COLS;
462 
463 	if (view->child) {
464 		view->child->begin_x = view_split_begin_x(view->begin_x);
465 		if (view->child->begin_x == 0) {
466 			view_fullscreen(view->child);
467 			if (view->child->focussed)
468 				show_panel(view->child->panel);
469 			else
470 				show_panel(view->panel);
471 		} else {
472 			view_splitscreen(view->child);
473 			show_panel(view->child->panel);
474 		}
475 	}
476 
477 	return NULL;
478 }
479 
480 static const struct got_error *
481 view_close_child(struct tog_view *view)
482 {
483 	const struct got_error *err = NULL;
484 
485 	if (view->child == NULL)
486 		return NULL;
487 
488 	err = view_close(view->child);
489 	view->child = NULL;
490 	return err;
491 }
492 
493 static const struct got_error *
494 view_set_child(struct tog_view *view, struct tog_view *child)
495 {
496 	const struct got_error *err = NULL;
497 
498 	view->child = child;
499 	child->parent = view;
500 	return err;
501 }
502 
503 static int
504 view_is_splitscreen(struct tog_view *view)
505 {
506 	return view->begin_x > 0;
507 }
508 
509 static void
510 tog_resizeterm(void)
511 {
512 	int cols, lines;
513 	struct winsize size;
514 
515 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
516 		cols = 80;     /* Default */
517 		lines = 24;
518 	} else {
519 		cols = size.ws_col;
520 		lines = size.ws_row;
521 	}
522 	resize_term(lines, cols);
523 }
524 
525 static const struct got_error *
526 view_input(struct tog_view **new, struct tog_view **dead,
527     struct tog_view **focus, int *done, struct tog_view *view,
528     struct tog_view_list_head *views)
529 {
530 	const struct got_error *err = NULL;
531 	struct tog_view *v;
532 	int ch, errcode;
533 
534 	*new = NULL;
535 	*dead = NULL;
536 	*focus = NULL;
537 
538 	if (view->searching && !view->search_next_done) {
539 		errcode = pthread_mutex_unlock(&tog_mutex);
540 		if (errcode)
541 			return got_error_set_errno(errcode,
542 			    "pthread_mutex_unlock");
543 		pthread_yield();
544 		errcode = pthread_mutex_lock(&tog_mutex);
545 		if (errcode)
546 			return got_error_set_errno(errcode,
547 			    "pthread_mutex_lock");
548 		view->search_next(view);
549 		nodelay(stdscr, TRUE);
550 		return NULL;
551 	}
552 
553 	nodelay(stdscr, FALSE);
554 	/* Allow threads to make progress while we are waiting for input. */
555 	errcode = pthread_mutex_unlock(&tog_mutex);
556 	if (errcode)
557 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
558 	ch = wgetch(view->window);
559 	errcode = pthread_mutex_lock(&tog_mutex);
560 	if (errcode)
561 		return got_error_set_errno(errcode, "pthread_mutex_lock");
562 	nodelay(stdscr, TRUE);
563 
564 	if (tog_sigwinch_received) {
565 		tog_resizeterm();
566 		tog_sigwinch_received = 0;
567 		TAILQ_FOREACH(v, views, entry) {
568 			err = view_resize(v);
569 			if (err)
570 				return err;
571 			err = v->input(new, dead, focus, v, KEY_RESIZE);
572 			if (err)
573 				return err;
574 		}
575 	}
576 
577 	switch (ch) {
578 	case ERR:
579 		break;
580 	case '\t':
581 		if (view->child) {
582 			*focus = view->child;
583 			view->child_focussed = 1;
584 		} else if (view->parent) {
585 			*focus = view->parent;
586 			view->parent->child_focussed = 0;
587 		}
588 		break;
589 	case 'q':
590 		err = view->input(new, dead, focus, view, ch);
591 		*dead = view;
592 		break;
593 	case 'Q':
594 		*done = 1;
595 		break;
596 	case 'f':
597 		if (view_is_parent_view(view)) {
598 			if (view->child == NULL)
599 				break;
600 			if (view_is_splitscreen(view->child)) {
601 				*focus = view->child;
602 				view->child_focussed = 1;
603 				err = view_fullscreen(view->child);
604 			} else
605 				err = view_splitscreen(view->child);
606 			if (err)
607 				break;
608 			err = view->child->input(new, dead, focus,
609 			    view->child, KEY_RESIZE);
610 		} else {
611 			if (view_is_splitscreen(view)) {
612 				*focus = view;
613 				view->parent->child_focussed = 1;
614 				err = view_fullscreen(view);
615 			} else {
616 				err = view_splitscreen(view);
617 			}
618 			if (err)
619 				break;
620 			err = view->input(new, dead, focus, view,
621 			    KEY_RESIZE);
622 		}
623 		break;
624 	case KEY_RESIZE:
625 		break;
626 	case '/':
627 		if (view->search_start)
628 			view->search_start(view);
629 		else
630 			err = view->input(new, dead, focus, view, ch);
631 		break;
632 	case 'N':
633 	case 'n':
634 		if (view->search_next && view->searching) {
635 			view->searching = (ch == 'n' ?
636 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
637 			view->search_next_done = 0;
638 			view->search_next(view);
639 		} else
640 			err = view->input(new, dead, focus, view, ch);
641 		break;
642 	default:
643 		err = view->input(new, dead, focus, view, ch);
644 		break;
645 	}
646 
647 	return err;
648 }
649 
650 void
651 view_vborder(struct tog_view *view)
652 {
653 	PANEL *panel;
654 	struct tog_view *view_above;
655 
656 	if (view->parent)
657 		return view_vborder(view->parent);
658 
659 	panel = panel_above(view->panel);
660 	if (panel == NULL)
661 		return;
662 
663 	view_above = panel_userptr(panel);
664 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
665 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
666 }
667 
668 int
669 view_needs_focus_indication(struct tog_view *view)
670 {
671 	if (view_is_parent_view(view)) {
672 		if (view->child == NULL || view->child_focussed)
673 			return 0;
674 		if (!view_is_splitscreen(view->child))
675 			return 0;
676 	} else if (!view_is_splitscreen(view))
677 		return 0;
678 
679 	return view->focussed;
680 }
681 
682 static const struct got_error *
683 view_loop(struct tog_view *view)
684 {
685 	const struct got_error *err = NULL;
686 	struct tog_view_list_head views;
687 	struct tog_view *new_view, *dead_view, *focus_view, *main_view;
688 	int fast_refresh = 10;
689 	int done = 0, errcode;
690 
691 	errcode = pthread_mutex_lock(&tog_mutex);
692 	if (errcode)
693 		return got_error_set_errno(errcode, "pthread_mutex_lock");
694 
695 	TAILQ_INIT(&views);
696 	TAILQ_INSERT_HEAD(&views, view, entry);
697 
698 	main_view = view;
699 	view->focussed = 1;
700 	err = view->show(view);
701 	if (err)
702 		return err;
703 	update_panels();
704 	doupdate();
705 	while (!TAILQ_EMPTY(&views) && !done) {
706 		/* Refresh fast during initialization, then become slower. */
707 		if (fast_refresh && fast_refresh-- == 0)
708 			halfdelay(10); /* switch to once per second */
709 
710 		err = view_input(&new_view, &dead_view, &focus_view, &done,
711 		    view, &views);
712 		if (err)
713 			break;
714 		if (dead_view) {
715 			struct tog_view *prev = NULL;
716 
717 			if (view_is_parent_view(dead_view))
718 				prev = TAILQ_PREV(dead_view,
719 				    tog_view_list_head, entry);
720 			else if (view->parent != dead_view)
721 				prev = view->parent;
722 
723 			if (dead_view->parent)
724 				dead_view->parent->child = NULL;
725 			else
726 				TAILQ_REMOVE(&views, dead_view, entry);
727 
728 			err = view_close(dead_view);
729 			if (err || dead_view == main_view)
730 				goto done;
731 
732 			if (view == dead_view) {
733 				if (focus_view)
734 					view = focus_view;
735 				else if (prev)
736 					view = prev;
737 				else if (!TAILQ_EMPTY(&views))
738 					view = TAILQ_LAST(&views,
739 					    tog_view_list_head);
740 				else
741 					view = NULL;
742 				if (view) {
743 					if (view->child && view->child_focussed)
744 						focus_view = view->child;
745 					else
746 						focus_view = view;
747 				}
748 			}
749 		}
750 		if (new_view) {
751 			struct tog_view *v, *t;
752 			/* Only allow one parent view per type. */
753 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
754 				if (v->type != new_view->type)
755 					continue;
756 				TAILQ_REMOVE(&views, v, entry);
757 				err = view_close(v);
758 				if (err)
759 					goto done;
760 				break;
761 			}
762 			TAILQ_INSERT_TAIL(&views, new_view, entry);
763 			view = new_view;
764 			if (focus_view == NULL)
765 				focus_view = new_view;
766 		}
767 		if (focus_view) {
768 			show_panel(focus_view->panel);
769 			if (view)
770 				view->focussed = 0;
771 			focus_view->focussed = 1;
772 			view = focus_view;
773 			if (new_view)
774 				show_panel(new_view->panel);
775 			if (view->child && view_is_splitscreen(view->child))
776 				show_panel(view->child->panel);
777 		}
778 		if (view) {
779 			if (focus_view == NULL) {
780 				view->focussed = 1;
781 				show_panel(view->panel);
782 				if (view->child && view_is_splitscreen(view->child))
783 					show_panel(view->child->panel);
784 				focus_view = view;
785 			}
786 			if (view->parent) {
787 				err = view->parent->show(view->parent);
788 				if (err)
789 					goto done;
790 			}
791 			err = view->show(view);
792 			if (err)
793 				goto done;
794 			if (view->child) {
795 				err = view->child->show(view->child);
796 				if (err)
797 					goto done;
798 			}
799 			update_panels();
800 			doupdate();
801 		}
802 	}
803 done:
804 	while (!TAILQ_EMPTY(&views)) {
805 		view = TAILQ_FIRST(&views);
806 		TAILQ_REMOVE(&views, view, entry);
807 		view_close(view);
808 	}
809 
810 	errcode = pthread_mutex_unlock(&tog_mutex);
811 	if (errcode)
812 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
813 
814 	return err;
815 }
816 
817 __dead static void
818 usage_log(void)
819 {
820 	endwin();
821 	fprintf(stderr,
822 	    "usage: %s log [-c commit] [-r repository-path] [path]\n",
823 	    getprogname());
824 	exit(1);
825 }
826 
827 /* Create newly allocated wide-character string equivalent to a byte string. */
828 static const struct got_error *
829 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
830 {
831 	char *vis = NULL;
832 	const struct got_error *err = NULL;
833 
834 	*ws = NULL;
835 	*wlen = mbstowcs(NULL, s, 0);
836 	if (*wlen == (size_t)-1) {
837 		int vislen;
838 		if (errno != EILSEQ)
839 			return got_error_from_errno("mbstowcs");
840 
841 		/* byte string invalid in current encoding; try to "fix" it */
842 		err = got_mbsavis(&vis, &vislen, s);
843 		if (err)
844 			return err;
845 		*wlen = mbstowcs(NULL, vis, 0);
846 		if (*wlen == (size_t)-1) {
847 			err = got_error_from_errno("mbstowcs"); /* give up */
848 			goto done;
849 		}
850 	}
851 
852 	*ws = calloc(*wlen + 1, sizeof(*ws));
853 	if (*ws == NULL) {
854 		err = got_error_from_errno("calloc");
855 		goto done;
856 	}
857 
858 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
859 		err = got_error_from_errno("mbstowcs");
860 done:
861 	free(vis);
862 	if (err) {
863 		free(*ws);
864 		*ws = NULL;
865 		*wlen = 0;
866 	}
867 	return err;
868 }
869 
870 /* Format a line for display, ensuring that it won't overflow a width limit. */
871 static const struct got_error *
872 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit)
873 {
874 	const struct got_error *err = NULL;
875 	int cols = 0;
876 	wchar_t *wline = NULL;
877 	size_t wlen;
878 	int i;
879 
880 	*wlinep = NULL;
881 	*widthp = 0;
882 
883 	err = mbs2ws(&wline, &wlen, line);
884 	if (err)
885 		return err;
886 
887 	i = 0;
888 	while (i < wlen && cols < wlimit) {
889 		int width = wcwidth(wline[i]);
890 		switch (width) {
891 		case 0:
892 			i++;
893 			break;
894 		case 1:
895 		case 2:
896 			if (cols + width <= wlimit)
897 				cols += width;
898 			i++;
899 			break;
900 		case -1:
901 			if (wline[i] == L'\t')
902 				cols += TABSIZE - ((cols + 1) % TABSIZE);
903 			i++;
904 			break;
905 		default:
906 			err = got_error_from_errno("wcwidth");
907 			goto done;
908 		}
909 	}
910 	wline[i] = L'\0';
911 	if (widthp)
912 		*widthp = cols;
913 done:
914 	if (err)
915 		free(wline);
916 	else
917 		*wlinep = wline;
918 	return err;
919 }
920 
921 static const struct got_error*
922 build_refs_str(char **refs_str, struct got_reflist_head *refs,
923     struct got_object_id *id)
924 {
925 	static const struct got_error *err = NULL;
926 	struct got_reflist_entry *re;
927 	char *s;
928 	const char *name;
929 
930 	*refs_str = NULL;
931 
932 	SIMPLEQ_FOREACH(re, refs, entry) {
933 		if (got_object_id_cmp(re->id, id) != 0)
934 			continue;
935 		name = got_ref_get_name(re->ref);
936 		if (strcmp(name, GOT_REF_HEAD) == 0)
937 			continue;
938 		if (strncmp(name, "refs/", 5) == 0)
939 			name += 5;
940 		if (strncmp(name, "got/", 4) == 0)
941 			continue;
942 		if (strncmp(name, "heads/", 6) == 0)
943 			name += 6;
944 		if (strncmp(name, "remotes/", 8) == 0)
945 			name += 8;
946 		s = *refs_str;
947 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
948 		    s ? ", " : "", name) == -1) {
949 			err = got_error_from_errno("asprintf");
950 			free(s);
951 			*refs_str = NULL;
952 			break;
953 		}
954 		free(s);
955 	}
956 
957 	return err;
958 }
959 
960 static const struct got_error *
961 format_author(wchar_t **wauthor, int *author_width, char *author, int limit)
962 {
963 	char *smallerthan, *at;
964 
965 	smallerthan = strchr(author, '<');
966 	if (smallerthan && smallerthan[1] != '\0')
967 		author = smallerthan + 1;
968 	at = strchr(author, '@');
969 	if (at)
970 		*at = '\0';
971 	return format_line(wauthor, author_width, author, limit);
972 }
973 
974 static const struct got_error *
975 draw_commit(struct tog_view *view, struct got_commit_object *commit,
976     struct got_object_id *id, struct got_reflist_head *refs,
977     int author_display_cols)
978 {
979 	const struct got_error *err = NULL;
980 	char datebuf[10]; /* YY-MM-DD + SPACE + NUL */
981 	char *logmsg0 = NULL, *logmsg = NULL;
982 	char *author = NULL;
983 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
984 	int author_width, logmsg_width;
985 	char *newline, *line = NULL;
986 	int col, limit;
987 	static const size_t date_display_cols = 9;
988 	const int avail = view->ncols;
989 	struct tm tm;
990 	time_t committer_time;
991 
992 	committer_time = got_object_commit_get_committer_time(commit);
993 	if (localtime_r(&committer_time, &tm) == NULL)
994 		return got_error_from_errno("localtime_r");
995 	if (strftime(datebuf, sizeof(datebuf), "%g/%m/%d ", &tm)
996 	    >= sizeof(datebuf))
997 		return got_error(GOT_ERR_NO_SPACE);
998 
999 	if (avail < date_display_cols)
1000 		limit = MIN(sizeof(datebuf) - 1, avail);
1001 	else
1002 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1003 	waddnstr(view->window, datebuf, limit);
1004 	col = limit + 1;
1005 	if (col > avail)
1006 		goto done;
1007 
1008 	author = strdup(got_object_commit_get_author(commit));
1009 	if (author == NULL) {
1010 		err = got_error_from_errno("strdup");
1011 		goto done;
1012 	}
1013 	err = format_author(&wauthor, &author_width, author, avail - col);
1014 	if (err)
1015 		goto done;
1016 	waddwstr(view->window, wauthor);
1017 	col += author_width;
1018 	while (col <= avail && author_width < author_display_cols + 2) {
1019 		waddch(view->window, ' ');
1020 		col++;
1021 		author_width++;
1022 	}
1023 	if (col > avail)
1024 		goto done;
1025 
1026 	logmsg0 = strdup(got_object_commit_get_logmsg(commit));
1027 	if (logmsg0 == NULL) {
1028 		err = got_error_from_errno("strdup");
1029 		goto done;
1030 	}
1031 	logmsg = logmsg0;
1032 	while (*logmsg == '\n')
1033 		logmsg++;
1034 	newline = strchr(logmsg, '\n');
1035 	if (newline)
1036 		*newline = '\0';
1037 	limit = avail - col;
1038 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit);
1039 	if (err)
1040 		goto done;
1041 	waddwstr(view->window, wlogmsg);
1042 	col += logmsg_width;
1043 	while (col <= avail) {
1044 		waddch(view->window, ' ');
1045 		col++;
1046 	}
1047 done:
1048 	free(logmsg0);
1049 	free(wlogmsg);
1050 	free(author);
1051 	free(wauthor);
1052 	free(line);
1053 	return err;
1054 }
1055 
1056 static struct commit_queue_entry *
1057 alloc_commit_queue_entry(struct got_commit_object *commit,
1058     struct got_object_id *id)
1059 {
1060 	struct commit_queue_entry *entry;
1061 
1062 	entry = calloc(1, sizeof(*entry));
1063 	if (entry == NULL)
1064 		return NULL;
1065 
1066 	entry->id = id;
1067 	entry->commit = commit;
1068 	return entry;
1069 }
1070 
1071 static void
1072 pop_commit(struct commit_queue *commits)
1073 {
1074 	struct commit_queue_entry *entry;
1075 
1076 	entry = TAILQ_FIRST(&commits->head);
1077 	TAILQ_REMOVE(&commits->head, entry, entry);
1078 	got_object_commit_close(entry->commit);
1079 	commits->ncommits--;
1080 	/* Don't free entry->id! It is owned by the commit graph. */
1081 	free(entry);
1082 }
1083 
1084 static void
1085 free_commits(struct commit_queue *commits)
1086 {
1087 	while (!TAILQ_EMPTY(&commits->head))
1088 		pop_commit(commits);
1089 }
1090 
1091 static const struct got_error *
1092 queue_commits(struct got_commit_graph *graph, struct commit_queue *commits,
1093     int minqueue, struct got_repository *repo, const char *path)
1094 {
1095 	const struct got_error *err = NULL;
1096 	int nqueued = 0;
1097 
1098 	/*
1099 	 * We keep all commits open throughout the lifetime of the log
1100 	 * view in order to avoid having to re-fetch commits from disk
1101 	 * while updating the display.
1102 	 */
1103 	while (nqueued < minqueue) {
1104 		struct got_object_id *id;
1105 		struct got_commit_object *commit;
1106 		struct commit_queue_entry *entry;
1107 		int errcode;
1108 
1109 		err = got_commit_graph_iter_next(&id, graph);
1110 		if (err) {
1111 			if (err->code != GOT_ERR_ITER_NEED_MORE)
1112 				break;
1113 			err = got_commit_graph_fetch_commits(graph,
1114 			    minqueue, repo);
1115 			if (err)
1116 				return err;
1117 			continue;
1118 		}
1119 
1120 		if (id == NULL)
1121 			break;
1122 
1123 		err = got_object_open_as_commit(&commit, repo, id);
1124 		if (err)
1125 			break;
1126 		entry = alloc_commit_queue_entry(commit, id);
1127 		if (entry == NULL) {
1128 			err = got_error_from_errno("alloc_commit_queue_entry");
1129 			break;
1130 		}
1131 
1132 		errcode = pthread_mutex_lock(&tog_mutex);
1133 		if (errcode) {
1134 			err = got_error_set_errno(errcode, "pthread_mutex_lock");
1135 			break;
1136 		}
1137 
1138 		entry->idx = commits->ncommits;
1139 		TAILQ_INSERT_TAIL(&commits->head, entry, entry);
1140 		nqueued++;
1141 		commits->ncommits++;
1142 
1143 		errcode = pthread_mutex_unlock(&tog_mutex);
1144 		if (errcode && err == NULL)
1145 			err = got_error_set_errno(errcode,
1146 			    "pthread_mutex_unlock");
1147 	}
1148 
1149 	return err;
1150 }
1151 
1152 static const struct got_error *
1153 get_head_commit_id(struct got_object_id **head_id, const char *branch_name,
1154     struct got_repository *repo)
1155 {
1156 	const struct got_error *err = NULL;
1157 	struct got_reference *head_ref;
1158 
1159 	*head_id = NULL;
1160 
1161 	err = got_ref_open(&head_ref, repo, branch_name, 0);
1162 	if (err)
1163 		return err;
1164 
1165 	err = got_ref_resolve(head_id, repo, head_ref);
1166 	got_ref_close(head_ref);
1167 	if (err) {
1168 		*head_id = NULL;
1169 		return err;
1170 	}
1171 
1172 	return NULL;
1173 }
1174 
1175 static const struct got_error *
1176 draw_commits(struct tog_view *view, struct commit_queue_entry **last,
1177     struct commit_queue_entry **selected, struct commit_queue_entry *first,
1178     struct commit_queue *commits, int selected_idx, int limit,
1179     struct got_reflist_head *refs, const char *path, int commits_needed)
1180 {
1181 	const struct got_error *err = NULL;
1182 	struct commit_queue_entry *entry;
1183 	int width;
1184 	int ncommits, author_cols = 10;
1185 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1186 	char *refs_str = NULL;
1187 	wchar_t *wline;
1188 
1189 	entry = first;
1190 	ncommits = 0;
1191 	while (entry) {
1192 		if (ncommits == selected_idx) {
1193 			*selected = entry;
1194 			break;
1195 		}
1196 		entry = TAILQ_NEXT(entry, entry);
1197 		ncommits++;
1198 	}
1199 
1200 	if (*selected && !(view->searching && view->search_next_done == 0)) {
1201 		err = got_object_id_str(&id_str, (*selected)->id);
1202 		if (err)
1203 			return err;
1204 		if (refs) {
1205 			err = build_refs_str(&refs_str, refs, (*selected)->id);
1206 			if (err)
1207 				goto done;
1208 		}
1209 	}
1210 
1211 	if (commits_needed == 0)
1212 		halfdelay(10); /* disable fast refresh */
1213 
1214 	if (asprintf(&ncommits_str, " [%d/%d] %s",
1215 	    entry ? entry->idx + 1 : 0, commits->ncommits,
1216 	    commits_needed > 0 ?
1217 	    (view->searching && view->search_next_done == 0
1218 	    ? "searching..." : "loading... ") :
1219 	    (refs_str ? refs_str : "")) == -1) {
1220 		err = got_error_from_errno("asprintf");
1221 		goto done;
1222 	}
1223 
1224 	if (path && strcmp(path, "/") != 0) {
1225 		if (asprintf(&header, "commit %s %s%s",
1226 		    id_str ? id_str : "........................................",
1227 		    path, ncommits_str) == -1) {
1228 			err = got_error_from_errno("asprintf");
1229 			header = NULL;
1230 			goto done;
1231 		}
1232 	} else if (asprintf(&header, "commit %s%s",
1233 	    id_str ? id_str : "........................................",
1234 	    ncommits_str) == -1) {
1235 		err = got_error_from_errno("asprintf");
1236 		header = NULL;
1237 		goto done;
1238 	}
1239 	err = format_line(&wline, &width, header, view->ncols);
1240 	if (err)
1241 		goto done;
1242 
1243 	werase(view->window);
1244 
1245 	if (view_needs_focus_indication(view))
1246 		wstandout(view->window);
1247 	waddwstr(view->window, wline);
1248 	while (width < view->ncols) {
1249 		waddch(view->window, ' ');
1250 		width++;
1251 	}
1252 	if (view_needs_focus_indication(view))
1253 		wstandend(view->window);
1254 	free(wline);
1255 	if (limit <= 1)
1256 		goto done;
1257 
1258 	/* Grow author column size if necessary. */
1259 	entry = first;
1260 	ncommits = 0;
1261 	while (entry) {
1262 		char *author;
1263 		wchar_t *wauthor;
1264 		int width;
1265 		if (ncommits >= limit - 1)
1266 			break;
1267 		author = strdup(got_object_commit_get_author(entry->commit));
1268 		if (author == NULL) {
1269 			err = got_error_from_errno("strdup");
1270 			goto done;
1271 		}
1272 		err = format_author(&wauthor, &width, author, COLS);
1273 		if (author_cols < width)
1274 			author_cols = width;
1275 		free(wauthor);
1276 		free(author);
1277 		entry = TAILQ_NEXT(entry, entry);
1278 	}
1279 
1280 	entry = first;
1281 	*last = first;
1282 	ncommits = 0;
1283 	while (entry) {
1284 		if (ncommits >= limit - 1)
1285 			break;
1286 		if (ncommits == selected_idx)
1287 			wstandout(view->window);
1288 		err = draw_commit(view, entry->commit, entry->id, refs,
1289 		    author_cols);
1290 		if (ncommits == selected_idx)
1291 			wstandend(view->window);
1292 		if (err)
1293 			goto done;
1294 		ncommits++;
1295 		*last = entry;
1296 		entry = TAILQ_NEXT(entry, entry);
1297 	}
1298 
1299 	view_vborder(view);
1300 done:
1301 	free(id_str);
1302 	free(refs_str);
1303 	free(ncommits_str);
1304 	free(header);
1305 	return err;
1306 }
1307 
1308 static void
1309 scroll_up(struct tog_view *view,
1310     struct commit_queue_entry **first_displayed_entry, int maxscroll,
1311     struct commit_queue *commits)
1312 {
1313 	struct commit_queue_entry *entry;
1314 	int nscrolled = 0;
1315 
1316 	entry = TAILQ_FIRST(&commits->head);
1317 	if (*first_displayed_entry == entry)
1318 		return;
1319 
1320 	entry = *first_displayed_entry;
1321 	while (entry && nscrolled < maxscroll) {
1322 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1323 		if (entry) {
1324 			*first_displayed_entry = entry;
1325 			nscrolled++;
1326 		}
1327 	}
1328 }
1329 
1330 static const struct got_error *
1331 trigger_log_thread(int load_all, int *commits_needed, int *log_complete,
1332     pthread_cond_t *need_commits)
1333 {
1334 	int errcode;
1335 	int max_wait = 20;
1336 
1337 	halfdelay(1); /* fast refresh while loading commits */
1338 
1339 	while (*commits_needed > 0) {
1340 		if (*log_complete)
1341 			break;
1342 
1343 		/* Wake the log thread. */
1344 		errcode = pthread_cond_signal(need_commits);
1345 		if (errcode)
1346 			return got_error_set_errno(errcode,
1347 			    "pthread_cond_signal");
1348 		errcode = pthread_mutex_unlock(&tog_mutex);
1349 		if (errcode)
1350 			return got_error_set_errno(errcode,
1351 			    "pthread_mutex_unlock");
1352 		pthread_yield();
1353 		errcode = pthread_mutex_lock(&tog_mutex);
1354 		if (errcode)
1355 			return got_error_set_errno(errcode,
1356 			    "pthread_mutex_lock");
1357 
1358 		if (*commits_needed > 0 && (!load_all || --max_wait <= 0)) {
1359 			/*
1360 			 * Thread is not done yet; lose a key press
1361 			 * and let the user retry... this way the GUI
1362 			 * remains interactive while logging deep paths
1363 			 * with few commits in history.
1364 			 */
1365 			return NULL;
1366 		}
1367 	}
1368 
1369 	return NULL;
1370 }
1371 
1372 static const struct got_error *
1373 scroll_down(struct tog_view *view,
1374     struct commit_queue_entry **first_displayed_entry, int maxscroll,
1375     struct commit_queue_entry **last_displayed_entry,
1376     struct commit_queue *commits, int *log_complete, int *commits_needed,
1377     pthread_cond_t *need_commits)
1378 {
1379 	const struct got_error *err = NULL;
1380 	struct commit_queue_entry *pentry;
1381 	int nscrolled = 0;
1382 
1383 	if (*last_displayed_entry == NULL)
1384 		return NULL;
1385 
1386 	pentry = TAILQ_NEXT(*last_displayed_entry, entry);
1387 	if (pentry == NULL && !*log_complete) {
1388 		/*
1389 		 * Ask the log thread for required amount of commits
1390 		 * plus some amount of pre-fetching.
1391 		 */
1392 		(*commits_needed) += maxscroll + 20;
1393 		err = trigger_log_thread(0, commits_needed, log_complete,
1394 		    need_commits);
1395 		if (err)
1396 			return err;
1397 	}
1398 
1399 	do {
1400 		pentry = TAILQ_NEXT(*last_displayed_entry, entry);
1401 		if (pentry == NULL)
1402 			break;
1403 
1404 		*last_displayed_entry = pentry;
1405 
1406 		pentry = TAILQ_NEXT(*first_displayed_entry, entry);
1407 		if (pentry == NULL)
1408 			break;
1409 		*first_displayed_entry = pentry;
1410 	} while (++nscrolled < maxscroll);
1411 
1412 	return err;
1413 }
1414 
1415 static const struct got_error *
1416 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1417     struct got_commit_object *commit, struct got_object_id *commit_id,
1418     struct tog_view *log_view, struct got_reflist_head *refs,
1419     struct got_repository *repo)
1420 {
1421 	const struct got_error *err;
1422 	struct got_object_qid *parent_id;
1423 	struct tog_view *diff_view;
1424 
1425 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1426 	if (diff_view == NULL)
1427 		return got_error_from_errno("view_open");
1428 
1429 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1430 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1431 	    commit_id, log_view, refs, repo);
1432 	if (err == NULL)
1433 		*new_view = diff_view;
1434 	return err;
1435 }
1436 
1437 static const struct got_error *
1438 tree_view_visit_subtree(struct got_tree_object *subtree,
1439     struct tog_tree_view_state *s)
1440 {
1441 	struct tog_parent_tree *parent;
1442 
1443 	parent = calloc(1, sizeof(*parent));
1444 	if (parent == NULL)
1445 		return got_error_from_errno("calloc");
1446 
1447 	parent->tree = s->tree;
1448 	parent->first_displayed_entry = s->first_displayed_entry;
1449 	parent->selected_entry = s->selected_entry;
1450 	parent->selected = s->selected;
1451 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1452 	s->tree = subtree;
1453 	s->entries = got_object_tree_get_entries(s->tree);
1454 	s->selected = 0;
1455 	s->first_displayed_entry = NULL;
1456 	return NULL;
1457 }
1458 
1459 
1460 static const struct got_error *
1461 browse_commit_tree(struct tog_view **new_view, int begin_x,
1462     struct commit_queue_entry *entry, const char *path,
1463     struct got_reflist_head *refs, struct got_repository *repo)
1464 {
1465 	const struct got_error *err = NULL;
1466 	struct got_tree_object *tree;
1467 	struct got_tree_entry *te;
1468 	struct tog_tree_view_state *s;
1469 	struct tog_view *tree_view;
1470 	char *slash, *subpath = NULL;
1471 	const char *p;
1472 
1473 	err = got_object_open_as_tree(&tree, repo,
1474 	    got_object_commit_get_tree_id(entry->commit));
1475 	if (err)
1476 		return err;
1477 
1478 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1479 	if (tree_view == NULL)
1480 		return got_error_from_errno("view_open");
1481 
1482 	err = open_tree_view(tree_view, tree, entry->id, refs, repo);
1483 	if (err) {
1484 		got_object_tree_close(tree);
1485 		return err;
1486 	}
1487 	s = &tree_view->state.tree;
1488 
1489 	*new_view = tree_view;
1490 
1491 	/* Walk the path and open corresponding tree objects. */
1492 	p = path;
1493 	while (*p) {
1494 		struct got_object_id *tree_id;
1495 
1496 		while (p[0] == '/')
1497 			p++;
1498 
1499 		/* Ensure the correct subtree entry is selected. */
1500 		slash = strchr(p, '/');
1501 		if (slash == NULL)
1502 			slash = strchr(p, '\0');
1503 		SIMPLEQ_FOREACH(te, &s->entries->head, entry) {
1504 			if (strncmp(p, te->name, slash - p) == 0) {
1505 				s->selected_entry = te;
1506 				break;
1507 			}
1508 			s->selected++;
1509 		}
1510 		if (s->selected_entry == NULL) {
1511 			err = got_error(GOT_ERR_NO_TREE_ENTRY);
1512 			break;
1513 		}
1514 		if (s->tree != s->root)
1515 			s->selected++; /* skip '..' */
1516 
1517 		if (!S_ISDIR(s->selected_entry->mode)) {
1518 			/* Jump to this file's entry. */
1519 			s->first_displayed_entry = s->selected_entry;
1520 			s->selected = 0;
1521 			break;
1522 		}
1523 
1524 		slash = strchr(p, '/');
1525 		if (slash)
1526 			subpath = strndup(path, slash - path);
1527 		else
1528 			subpath = strdup(path);
1529 		if (subpath == NULL) {
1530 			err = got_error_from_errno("strdup");
1531 			break;
1532 		}
1533 
1534 		err = got_object_id_by_path(&tree_id, repo, entry->id,
1535 		    subpath);
1536 		if (err)
1537 			break;
1538 
1539 		err = got_object_open_as_tree(&tree, repo, tree_id);
1540 		free(tree_id);
1541 		if (err)
1542 			break;
1543 
1544 		err = tree_view_visit_subtree(tree, s);
1545 		if (err) {
1546 			got_object_tree_close(tree);
1547 			break;
1548 		}
1549 		if (slash == NULL)
1550 			break;
1551 		free(subpath);
1552 		subpath = NULL;
1553 		p = slash;
1554 	}
1555 
1556 	free(subpath);
1557 	return err;
1558 }
1559 
1560 static void *
1561 log_thread(void *arg)
1562 {
1563 	const struct got_error *err = NULL;
1564 	int errcode = 0;
1565 	struct tog_log_thread_args *a = arg;
1566 	int done = 0;
1567 
1568 	err = got_commit_graph_iter_start(a->graph, a->start_id, a->repo);
1569 	if (err)
1570 		return (void *)err;
1571 
1572 	while (!done && !err) {
1573 		err = queue_commits(a->graph, a->commits, 1, a->repo,
1574 		    a->in_repo_path);
1575 		if (err) {
1576 			if (err->code != GOT_ERR_ITER_COMPLETED)
1577 				return (void *)err;
1578 			err = NULL;
1579 			done = 1;
1580 		} else if (a->commits_needed > 0)
1581 			a->commits_needed--;
1582 
1583 		errcode = pthread_mutex_lock(&tog_mutex);
1584 		if (errcode) {
1585 			err = got_error_set_errno(errcode,
1586 			    "pthread_mutex_lock");
1587 			break;
1588 		} else if (*a->quit)
1589 			done = 1;
1590 		else if (*a->first_displayed_entry == NULL) {
1591 			*a->first_displayed_entry =
1592 			    TAILQ_FIRST(&a->commits->head);
1593 			*a->selected_entry = *a->first_displayed_entry;
1594 		}
1595 
1596 		if (done)
1597 			a->commits_needed = 0;
1598 		else if (a->commits_needed == 0) {
1599 			errcode = pthread_cond_wait(&a->need_commits,
1600 			    &tog_mutex);
1601 			if (errcode)
1602 				err = got_error_set_errno(errcode,
1603 				    "pthread_cond_wait");
1604 		}
1605 
1606 		errcode = pthread_mutex_unlock(&tog_mutex);
1607 		if (errcode && err == NULL)
1608 			err = got_error_set_errno(errcode,
1609 			    "pthread_mutex_unlock");
1610 	}
1611 	a->log_complete = 1;
1612 	return (void *)err;
1613 }
1614 
1615 static const struct got_error *
1616 stop_log_thread(struct tog_log_view_state *s)
1617 {
1618 	const struct got_error *err = NULL;
1619 	int errcode;
1620 
1621 	if (s->thread) {
1622 		s->quit = 1;
1623 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
1624 		if (errcode)
1625 			return got_error_set_errno(errcode,
1626 			    "pthread_cond_signal");
1627 		errcode = pthread_mutex_unlock(&tog_mutex);
1628 		if (errcode)
1629 			return got_error_set_errno(errcode,
1630 			    "pthread_mutex_unlock");
1631 		errcode = pthread_join(s->thread, (void **)&err);
1632 		if (errcode)
1633 			return got_error_set_errno(errcode, "pthread_join");
1634 		errcode = pthread_mutex_lock(&tog_mutex);
1635 		if (errcode)
1636 			return got_error_set_errno(errcode,
1637 			    "pthread_mutex_lock");
1638 		s->thread = NULL;
1639 	}
1640 
1641 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
1642 	if (errcode && err == NULL)
1643 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
1644 
1645 	if (s->thread_args.repo) {
1646 		got_repo_close(s->thread_args.repo);
1647 		s->thread_args.repo = NULL;
1648 	}
1649 
1650 	if (s->thread_args.graph) {
1651 		got_commit_graph_close(s->thread_args.graph);
1652 		s->thread_args.graph = NULL;
1653 	}
1654 
1655 	return err;
1656 }
1657 
1658 static const struct got_error *
1659 close_log_view(struct tog_view *view)
1660 {
1661 	const struct got_error *err = NULL;
1662 	struct tog_log_view_state *s = &view->state.log;
1663 
1664 	err = stop_log_thread(s);
1665 	free_commits(&s->commits);
1666 	free(s->in_repo_path);
1667 	s->in_repo_path = NULL;
1668 	free(s->start_id);
1669 	s->start_id = NULL;
1670 	return err;
1671 }
1672 
1673 static const struct got_error *
1674 search_start_log_view(struct tog_view *view)
1675 {
1676 	struct tog_log_view_state *s = &view->state.log;
1677 	char pattern[1024];
1678 	int ret;
1679 
1680 	if (view->nlines < 1)
1681 		return NULL;
1682 
1683 	mvwaddstr(view->window, view->begin_y + view->nlines - 1,
1684 	    view->begin_x, "/");
1685 	wclrtoeol(view->window);
1686 
1687 	nocbreak();
1688 	echo();
1689 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
1690 	cbreak();
1691 	noecho();
1692 	if (ret == ERR)
1693 		return NULL;
1694 
1695 	if (view->searching) {
1696 		regfree(&s->regex);
1697 		view->searching = 0;
1698 	}
1699 
1700 	s->matched_entry = NULL;
1701 	if (regcomp(&s->regex, pattern, REG_EXTENDED | REG_ICASE) == 0) {
1702 		view->searching = TOG_SEARCH_FORWARD;
1703 		view->search_next_done = 0;
1704 		view->search_next(view);
1705 	}
1706 
1707 	return NULL;
1708 }
1709 
1710 static int
1711 match_commit(struct got_commit_object *commit, regex_t *regex)
1712 {
1713 	regmatch_t regmatch;
1714 
1715 	if (regexec(regex, got_object_commit_get_author(commit), 1,
1716 	    &regmatch, 0) == 0 ||
1717 	    regexec(regex, got_object_commit_get_committer(commit), 1,
1718 	    &regmatch, 0) == 0 ||
1719 	    regexec(regex, got_object_commit_get_logmsg(commit), 1,
1720 	    &regmatch, 0) == 0)
1721 		return 1;
1722 
1723 	return 0;
1724 }
1725 
1726 static const struct got_error *
1727 search_next_log_view(struct tog_view *view)
1728 {
1729 	const struct got_error *err = NULL;
1730 	struct tog_log_view_state *s = &view->state.log;
1731 	struct commit_queue_entry *entry;
1732 
1733 	if (!view->searching) {
1734 		view->search_next_done = 1;
1735 		return NULL;
1736 	}
1737 
1738 	if (s->matched_entry) {
1739 		if (view->searching == TOG_SEARCH_FORWARD)
1740 			entry = TAILQ_NEXT(s->matched_entry, entry);
1741 		else
1742 			entry = TAILQ_PREV(s->matched_entry,
1743 			    commit_queue_head, entry);
1744 	} else
1745 		entry = TAILQ_FIRST(&s->commits.head);
1746 
1747 	while (1) {
1748 		if (entry == NULL) {
1749 			if (s->thread_args.log_complete) {
1750 				if (s->matched_entry == NULL) {
1751 					view->search_next_done = 1;
1752 					return NULL;
1753 				}
1754 				if (view->searching == TOG_SEARCH_FORWARD)
1755 					entry = TAILQ_FIRST(&s->commits.head);
1756 				else
1757 					entry = TAILQ_LAST(&s->commits.head,
1758 					    commit_queue_head);
1759 			} else {
1760 				s->thread_args.commits_needed = 1;
1761 				return trigger_log_thread(0,
1762 				    &s->thread_args.commits_needed,
1763 				    &s->thread_args.log_complete,
1764 				    &s->thread_args.need_commits);
1765 			}
1766 		}
1767 
1768 		if (match_commit(entry->commit, &s->regex)) {
1769 			view->search_next_done = 1;
1770 			break;
1771 		}
1772 		if (view->searching == TOG_SEARCH_FORWARD)
1773 			entry = TAILQ_NEXT(entry, entry);
1774 		else
1775 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
1776 	}
1777 
1778 	if (entry) {
1779 		int cur = s->selected_entry->idx;
1780 		s->matched_entry = entry;
1781 		while (cur < s->matched_entry->idx) {
1782 			err = input_log_view(NULL, NULL, NULL, view, KEY_DOWN);
1783 			if (err)
1784 				return err;
1785 			cur++;
1786 		}
1787 		while (cur > s->matched_entry->idx) {
1788 			err = input_log_view(NULL, NULL, NULL, view, KEY_UP);
1789 			if (err)
1790 				return err;
1791 			cur--;
1792 		}
1793 	}
1794 
1795 	return NULL;
1796 }
1797 
1798 
1799 static const struct got_error *
1800 open_log_view(struct tog_view *view, struct got_object_id *start_id,
1801     struct got_reflist_head *refs, struct got_repository *repo,
1802     const char *path, int check_disk)
1803 {
1804 	const struct got_error *err = NULL;
1805 	struct tog_log_view_state *s = &view->state.log;
1806 	struct got_repository *thread_repo = NULL;
1807 	struct got_commit_graph *thread_graph = NULL;
1808 	int errcode;
1809 
1810 	err = got_repo_map_path(&s->in_repo_path, repo, path, check_disk);
1811 	if (err != NULL)
1812 		goto done;
1813 
1814 	/* The commit queue only contains commits being displayed. */
1815 	TAILQ_INIT(&s->commits.head);
1816 	s->commits.ncommits = 0;
1817 
1818 	s->refs = refs;
1819 	s->repo = repo;
1820 	s->start_id = got_object_id_dup(start_id);
1821 	if (s->start_id == NULL) {
1822 		err = got_error_from_errno("got_object_id_dup");
1823 		goto done;
1824 	}
1825 
1826 	view->show = show_log_view;
1827 	view->input = input_log_view;
1828 	view->close = close_log_view;
1829 	view->search_start = search_start_log_view;
1830 	view->search_next = search_next_log_view;
1831 
1832 	err = got_repo_open(&thread_repo, got_repo_get_path(repo));
1833 	if (err)
1834 		goto done;
1835 	err = got_commit_graph_open(&thread_graph, start_id, s->in_repo_path,
1836 	    0, thread_repo);
1837 	if (err)
1838 		goto done;
1839 
1840 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
1841 	if (errcode) {
1842 		err = got_error_set_errno(errcode, "pthread_cond_init");
1843 		goto done;
1844 	}
1845 
1846 	s->thread_args.commits_needed = view->nlines;
1847 	s->thread_args.graph = thread_graph;
1848 	s->thread_args.commits = &s->commits;
1849 	s->thread_args.in_repo_path = s->in_repo_path;
1850 	s->thread_args.start_id = s->start_id;
1851 	s->thread_args.repo = thread_repo;
1852 	s->thread_args.log_complete = 0;
1853 	s->thread_args.quit = &s->quit;
1854 	s->thread_args.view = view;
1855 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
1856 	s->thread_args.selected_entry = &s->selected_entry;
1857 done:
1858 	if (err)
1859 		close_log_view(view);
1860 	return err;
1861 }
1862 
1863 static const struct got_error *
1864 show_log_view(struct tog_view *view)
1865 {
1866 	struct tog_log_view_state *s = &view->state.log;
1867 
1868 	if (s->thread == NULL) {
1869 		int errcode = pthread_create(&s->thread, NULL, log_thread,
1870 		    &s->thread_args);
1871 		if (errcode)
1872 			return got_error_set_errno(errcode, "pthread_create");
1873 	}
1874 
1875 	return draw_commits(view, &s->last_displayed_entry,
1876 	    &s->selected_entry, s->first_displayed_entry,
1877 	    &s->commits, s->selected, view->nlines, s->refs,
1878 	    s->in_repo_path, s->thread_args.commits_needed);
1879 }
1880 
1881 static const struct got_error *
1882 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
1883     struct tog_view **focus_view, struct tog_view *view, int ch)
1884 {
1885 	const struct got_error *err = NULL;
1886 	struct tog_log_view_state *s = &view->state.log;
1887 	char *parent_path;
1888 	struct tog_view *diff_view = NULL, *tree_view = NULL;
1889 	int begin_x = 0;
1890 
1891 	switch (ch) {
1892 	case 'q':
1893 		s->quit = 1;
1894 		break;
1895 	case 'k':
1896 	case KEY_UP:
1897 	case '<':
1898 	case ',':
1899 		if (s->first_displayed_entry == NULL)
1900 			break;
1901 		if (s->selected > 0)
1902 			s->selected--;
1903 		if (s->selected > 0)
1904 			break;
1905 		scroll_up(view, &s->first_displayed_entry, 1,
1906 		    &s->commits);
1907 		break;
1908 	case KEY_PPAGE:
1909 	case CTRL('b'):
1910 		if (s->first_displayed_entry == NULL)
1911 			break;
1912 		if (TAILQ_FIRST(&s->commits.head) ==
1913 		    s->first_displayed_entry) {
1914 			s->selected = 0;
1915 			break;
1916 		}
1917 		scroll_up(view, &s->first_displayed_entry,
1918 		    view->nlines, &s->commits);
1919 		break;
1920 	case 'j':
1921 	case KEY_DOWN:
1922 	case '>':
1923 	case '.':
1924 		if (s->first_displayed_entry == NULL)
1925 			break;
1926 		if (s->selected < MIN(view->nlines - 2,
1927 		    s->commits.ncommits - 1)) {
1928 			s->selected++;
1929 			break;
1930 		}
1931 		err = scroll_down(view, &s->first_displayed_entry, 1,
1932 		    &s->last_displayed_entry, &s->commits,
1933 		    &s->thread_args.log_complete,
1934 		    &s->thread_args.commits_needed,
1935 		    &s->thread_args.need_commits);
1936 		break;
1937 	case KEY_NPAGE:
1938 	case CTRL('f'): {
1939 		struct commit_queue_entry *first;
1940 		first = s->first_displayed_entry;
1941 		if (first == NULL)
1942 			break;
1943 		err = scroll_down(view, &s->first_displayed_entry,
1944 		    view->nlines, &s->last_displayed_entry,
1945 		    &s->commits, &s->thread_args.log_complete,
1946 		    &s->thread_args.commits_needed,
1947 		    &s->thread_args.need_commits);
1948 		if (first == s->first_displayed_entry &&
1949 		    s->selected < MIN(view->nlines - 2,
1950 		    s->commits.ncommits - 1)) {
1951 			/* can't scroll further down */
1952 			s->selected = MIN(view->nlines - 2,
1953 			    s->commits.ncommits - 1);
1954 		}
1955 		err = NULL;
1956 		break;
1957 	}
1958 	case KEY_RESIZE:
1959 		if (s->selected > view->nlines - 2)
1960 			s->selected = view->nlines - 2;
1961 		if (s->selected > s->commits.ncommits - 1)
1962 			s->selected = s->commits.ncommits - 1;
1963 		break;
1964 	case KEY_ENTER:
1965 	case ' ':
1966 	case '\r':
1967 		if (s->selected_entry == NULL)
1968 			break;
1969 		if (view_is_parent_view(view))
1970 			begin_x = view_split_begin_x(view->begin_x);
1971 		err = open_diff_view_for_commit(&diff_view, begin_x,
1972 		    s->selected_entry->commit, s->selected_entry->id,
1973 		    view, s->refs, s->repo);
1974 		if (err)
1975 			break;
1976 		if (view_is_parent_view(view)) {
1977 			err = view_close_child(view);
1978 			if (err)
1979 				return err;
1980 			err = view_set_child(view, diff_view);
1981 			if (err) {
1982 				view_close(diff_view);
1983 				break;
1984 			}
1985 			*focus_view = diff_view;
1986 			view->child_focussed = 1;
1987 		} else
1988 			*new_view = diff_view;
1989 		break;
1990 	case 't':
1991 		if (s->selected_entry == NULL)
1992 			break;
1993 		if (view_is_parent_view(view))
1994 			begin_x = view_split_begin_x(view->begin_x);
1995 		err = browse_commit_tree(&tree_view, begin_x,
1996 		    s->selected_entry, s->in_repo_path, s->refs, s->repo);
1997 		if (err)
1998 			break;
1999 		if (view_is_parent_view(view)) {
2000 			err = view_close_child(view);
2001 			if (err)
2002 				return err;
2003 			err = view_set_child(view, tree_view);
2004 			if (err) {
2005 				view_close(tree_view);
2006 				break;
2007 			}
2008 			*focus_view = tree_view;
2009 			view->child_focussed = 1;
2010 		} else
2011 			*new_view = tree_view;
2012 		break;
2013 	case KEY_BACKSPACE:
2014 		if (strcmp(s->in_repo_path, "/") == 0)
2015 			break;
2016 		parent_path = dirname(s->in_repo_path);
2017 		if (parent_path && strcmp(parent_path, ".") != 0) {
2018 			struct tog_view *lv;
2019 			err = stop_log_thread(s);
2020 			if (err)
2021 				return err;
2022 			lv = view_open(view->nlines, view->ncols,
2023 			    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2024 			if (lv == NULL)
2025 				return got_error_from_errno(
2026 				    "view_open");
2027 			err = open_log_view(lv, s->start_id, s->refs,
2028 			    s->repo, parent_path, 0);
2029 			if (err)
2030 				return err;;
2031 			if (view_is_parent_view(view))
2032 				*new_view = lv;
2033 			else {
2034 				view_set_child(view->parent, lv);
2035 				*focus_view = lv;
2036 			}
2037 			return NULL;
2038 		}
2039 		break;
2040 	default:
2041 		break;
2042 	}
2043 
2044 	return err;
2045 }
2046 
2047 static const struct got_error *
2048 apply_unveil(const char *repo_path, const char *worktree_path)
2049 {
2050 	const struct got_error *error;
2051 
2052 	if (repo_path && unveil(repo_path, "r") != 0)
2053 		return got_error_from_errno2("unveil", repo_path);
2054 
2055 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2056 		return got_error_from_errno2("unveil", worktree_path);
2057 
2058 	if (unveil("/tmp", "rwc") != 0)
2059 		return got_error_from_errno2("unveil", "/tmp");
2060 
2061 	error = got_privsep_unveil_exec_helpers();
2062 	if (error != NULL)
2063 		return error;
2064 
2065 	if (unveil(NULL, NULL) != 0)
2066 		return got_error_from_errno("unveil");
2067 
2068 	return NULL;
2069 }
2070 
2071 static void
2072 init_curses(void)
2073 {
2074 	initscr();
2075 	cbreak();
2076 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2077 	noecho();
2078 	nonl();
2079 	intrflush(stdscr, FALSE);
2080 	keypad(stdscr, TRUE);
2081 	curs_set(0);
2082 	signal(SIGWINCH, tog_sigwinch);
2083 }
2084 
2085 static const struct got_error *
2086 cmd_log(int argc, char *argv[])
2087 {
2088 	const struct got_error *error;
2089 	struct got_repository *repo = NULL;
2090 	struct got_worktree *worktree = NULL;
2091 	struct got_reflist_head refs;
2092 	struct got_object_id *start_id = NULL;
2093 	char *path = NULL, *repo_path = NULL, *cwd = NULL;
2094 	char *start_commit = NULL;
2095 	int ch;
2096 	struct tog_view *view;
2097 
2098 	SIMPLEQ_INIT(&refs);
2099 
2100 #ifndef PROFILE
2101 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2102 	    NULL) == -1)
2103 		err(1, "pledge");
2104 #endif
2105 
2106 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
2107 		switch (ch) {
2108 		case 'c':
2109 			start_commit = optarg;
2110 			break;
2111 		case 'r':
2112 			repo_path = realpath(optarg, NULL);
2113 			if (repo_path == NULL)
2114 				err(1, "-r option");
2115 			break;
2116 		default:
2117 			usage_log();
2118 			/* NOTREACHED */
2119 		}
2120 	}
2121 
2122 	argc -= optind;
2123 	argv += optind;
2124 
2125 	cwd = getcwd(NULL, 0);
2126 	if (cwd == NULL) {
2127 		error = got_error_from_errno("getcwd");
2128 		goto done;
2129 	}
2130 	error = got_worktree_open(&worktree, cwd);
2131 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
2132 		goto done;
2133 	error = NULL;
2134 
2135 	if (argc == 0) {
2136 		path = strdup("");
2137 		if (path == NULL) {
2138 			error = got_error_from_errno("strdup");
2139 			goto done;
2140 		}
2141 	} else if (argc == 1) {
2142 		if (worktree) {
2143 			error = got_worktree_resolve_path(&path, worktree,
2144 			    argv[0]);
2145 			if (error)
2146 				goto done;
2147 		} else {
2148 			path = strdup(argv[0]);
2149 			if (path == NULL) {
2150 				error = got_error_from_errno("strdup");
2151 				goto done;
2152 			}
2153 		}
2154 	} else
2155 		usage_log();
2156 
2157 	repo_path = worktree ?
2158 	    strdup(got_worktree_get_repo_path(worktree)) : strdup(cwd);
2159 	if (repo_path == NULL) {
2160 		error = got_error_from_errno("strdup");
2161 		goto done;
2162 	}
2163 
2164 	init_curses();
2165 
2166 	error = got_repo_open(&repo, repo_path);
2167 	if (error != NULL)
2168 		goto done;
2169 
2170 	error = apply_unveil(got_repo_get_path(repo),
2171 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2172 	if (error)
2173 		goto done;
2174 
2175 	if (start_commit == NULL)
2176 		error = get_head_commit_id(&start_id, worktree ?
2177 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
2178 		    repo);
2179 	else
2180 		error = got_object_resolve_id_str(&start_id, repo,
2181 		    start_commit);
2182 	if (error != NULL)
2183 		goto done;
2184 
2185 	error = got_ref_list(&refs, repo);
2186 	if (error)
2187 		goto done;
2188 
2189 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2190 	if (view == NULL) {
2191 		error = got_error_from_errno("view_open");
2192 		goto done;
2193 	}
2194 	error = open_log_view(view, start_id, &refs, repo, path, 1);
2195 	if (error)
2196 		goto done;
2197 	error = view_loop(view);
2198 done:
2199 	free(repo_path);
2200 	free(cwd);
2201 	free(path);
2202 	free(start_id);
2203 	if (repo)
2204 		got_repo_close(repo);
2205 	if (worktree)
2206 		got_worktree_close(worktree);
2207 	got_ref_list_free(&refs);
2208 	return error;
2209 }
2210 
2211 __dead static void
2212 usage_diff(void)
2213 {
2214 	endwin();
2215 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
2216 	    getprogname());
2217 	exit(1);
2218 }
2219 
2220 static char *
2221 parse_next_line(FILE *f, size_t *len)
2222 {
2223 	char *line;
2224 	size_t linelen;
2225 	size_t lineno;
2226 	const char delim[3] = { '\0', '\0', '\0'};
2227 
2228 	line = fparseln(f, &linelen, &lineno, delim, 0);
2229 	if (len)
2230 		*len = linelen;
2231 	return line;
2232 }
2233 
2234 static const struct got_error *
2235 draw_file(struct tog_view *view, FILE *f, int *first_displayed_line,
2236     int *last_displayed_line, int *eof, int max_lines,
2237     char *header)
2238 {
2239 	const struct got_error *err;
2240 	int nlines = 0, nprinted = 0;
2241 	char *line;
2242 	size_t len;
2243 	wchar_t *wline;
2244 	int width;
2245 
2246 	rewind(f);
2247 	werase(view->window);
2248 
2249 	if (header) {
2250 		err = format_line(&wline, &width, header, view->ncols);
2251 		if (err) {
2252 			return err;
2253 		}
2254 
2255 		if (view_needs_focus_indication(view))
2256 			wstandout(view->window);
2257 		waddwstr(view->window, wline);
2258 		if (view_needs_focus_indication(view))
2259 			wstandend(view->window);
2260 		if (width < view->ncols - 1)
2261 			waddch(view->window, '\n');
2262 
2263 		if (max_lines <= 1)
2264 			return NULL;
2265 		max_lines--;
2266 	}
2267 
2268 	*eof = 0;
2269 	while (nprinted < max_lines) {
2270 		line = parse_next_line(f, &len);
2271 		if (line == NULL) {
2272 			*eof = 1;
2273 			break;
2274 		}
2275 		if (++nlines < *first_displayed_line) {
2276 			free(line);
2277 			continue;
2278 		}
2279 
2280 		err = format_line(&wline, &width, line, view->ncols);
2281 		if (err) {
2282 			free(line);
2283 			return err;
2284 		}
2285 		waddwstr(view->window, wline);
2286 		if (width < view->ncols - 1)
2287 			waddch(view->window, '\n');
2288 		if (++nprinted == 1)
2289 			*first_displayed_line = nlines;
2290 		free(line);
2291 		free(wline);
2292 		wline = NULL;
2293 	}
2294 	*last_displayed_line = nlines;
2295 
2296 	view_vborder(view);
2297 
2298 	if (*eof) {
2299 		while (nprinted < view->nlines) {
2300 			waddch(view->window, '\n');
2301 			nprinted++;
2302 		}
2303 
2304 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols);
2305 		if (err) {
2306 			return err;
2307 		}
2308 
2309 		wstandout(view->window);
2310 		waddwstr(view->window, wline);
2311 		wstandend(view->window);
2312 	}
2313 
2314 	return NULL;
2315 }
2316 
2317 static char *
2318 get_datestr(time_t *time, char *datebuf)
2319 {
2320 	char *p, *s = ctime_r(time, datebuf);
2321 	p = strchr(s, '\n');
2322 	if (p)
2323 		*p = '\0';
2324 	return s;
2325 }
2326 
2327 static const struct got_error *
2328 write_commit_info(struct got_object_id *commit_id,
2329     struct got_reflist_head *refs, struct got_repository *repo, FILE *outfile)
2330 {
2331 	const struct got_error *err = NULL;
2332 	char datebuf[26];
2333 	struct got_commit_object *commit;
2334 	char *id_str = NULL;
2335 	time_t committer_time;
2336 	const char *author, *committer;
2337 	char *refs_str = NULL;
2338 
2339 	if (refs) {
2340 		err = build_refs_str(&refs_str, refs, commit_id);
2341 		if (err)
2342 			return err;
2343 	}
2344 
2345 	err = got_object_open_as_commit(&commit, repo, commit_id);
2346 	if (err)
2347 		return err;
2348 
2349 	err = got_object_id_str(&id_str, commit_id);
2350 	if (err) {
2351 		err = got_error_from_errno("got_object_id_str");
2352 		goto done;
2353 	}
2354 
2355 	if (fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
2356 	    refs_str ? refs_str : "", refs_str ? ")" : "") < 0) {
2357 		err = got_error_from_errno("fprintf");
2358 		goto done;
2359 	}
2360 	if (fprintf(outfile, "from: %s\n",
2361 	    got_object_commit_get_author(commit)) < 0) {
2362 		err = got_error_from_errno("fprintf");
2363 		goto done;
2364 	}
2365 	committer_time = got_object_commit_get_committer_time(commit);
2366 	if (fprintf(outfile, "date: %s UTC\n",
2367 	    get_datestr(&committer_time, datebuf)) < 0) {
2368 		err = got_error_from_errno("fprintf");
2369 		goto done;
2370 	}
2371 	author = got_object_commit_get_author(commit);
2372 	committer = got_object_commit_get_committer(commit);
2373 	if (strcmp(author, committer) != 0 &&
2374 	    fprintf(outfile, "via: %s\n", committer) < 0) {
2375 		err = got_error_from_errno("fprintf");
2376 		goto done;
2377 	}
2378 	if (fprintf(outfile, "%s\n",
2379 	    got_object_commit_get_logmsg(commit)) < 0) {
2380 		err = got_error_from_errno("fprintf");
2381 		goto done;
2382 	}
2383 done:
2384 	free(id_str);
2385 	free(refs_str);
2386 	got_object_commit_close(commit);
2387 	return err;
2388 }
2389 
2390 static const struct got_error *
2391 create_diff(struct tog_diff_view_state *s)
2392 {
2393 	const struct got_error *err = NULL;
2394 	FILE *f = NULL;
2395 	int obj_type;
2396 
2397 	f = got_opentemp();
2398 	if (f == NULL) {
2399 		err = got_error_from_errno("got_opentemp");
2400 		goto done;
2401 	}
2402 	if (s->f && fclose(s->f) != 0) {
2403 		err = got_error_from_errno("fclose");
2404 		goto done;
2405 	}
2406 	s->f = f;
2407 
2408 	if (s->id1)
2409 		err = got_object_get_type(&obj_type, s->repo, s->id1);
2410 	else
2411 		err = got_object_get_type(&obj_type, s->repo, s->id2);
2412 	if (err)
2413 		goto done;
2414 
2415 	switch (obj_type) {
2416 	case GOT_OBJ_TYPE_BLOB:
2417 		err = got_diff_objects_as_blobs(s->id1, s->id2, NULL, NULL,
2418 		    s->diff_context, s->repo, f);
2419 		break;
2420 	case GOT_OBJ_TYPE_TREE:
2421 		err = got_diff_objects_as_trees(s->id1, s->id2, "", "",
2422 		    s->diff_context, s->repo, f);
2423 		break;
2424 	case GOT_OBJ_TYPE_COMMIT: {
2425 		const struct got_object_id_queue *parent_ids;
2426 		struct got_object_qid *pid;
2427 		struct got_commit_object *commit2;
2428 
2429 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
2430 		if (err)
2431 			break;
2432 		/* Show commit info if we're diffing to a parent/root commit. */
2433 		if (s->id1 == NULL)
2434 			write_commit_info(s->id2, s->refs, s->repo, f);
2435 		else {
2436 			parent_ids = got_object_commit_get_parent_ids(commit2);
2437 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
2438 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
2439 					write_commit_info(s->id2, s->refs,
2440 					    s->repo, f);
2441 					break;
2442 				}
2443 			}
2444 		}
2445 		got_object_commit_close(commit2);
2446 
2447 		err = got_diff_objects_as_commits(s->id1, s->id2,
2448 		    s->diff_context, s->repo, f);
2449 		break;
2450 	}
2451 	default:
2452 		err = got_error(GOT_ERR_OBJ_TYPE);
2453 		break;
2454 	}
2455 done:
2456 	if (f && fflush(f) != 0 && err == NULL)
2457 		err = got_error_from_errno("fflush");
2458 	return err;
2459 }
2460 
2461 static void
2462 diff_view_indicate_progress(struct tog_view *view)
2463 {
2464 	mvwaddstr(view->window, 0, 0, "diffing...");
2465 	update_panels();
2466 	doupdate();
2467 }
2468 
2469 static const struct got_error *
2470 open_diff_view(struct tog_view *view, struct got_object_id *id1,
2471     struct got_object_id *id2, struct tog_view *log_view,
2472     struct got_reflist_head *refs, struct got_repository *repo)
2473 {
2474 	const struct got_error *err;
2475 
2476 	if (id1 != NULL && id2 != NULL) {
2477 	    int type1, type2;
2478 	    err = got_object_get_type(&type1, repo, id1);
2479 	    if (err)
2480 		return err;
2481 	    err = got_object_get_type(&type2, repo, id2);
2482 	    if (err)
2483 		return err;
2484 
2485 	    if (type1 != type2)
2486 		return got_error(GOT_ERR_OBJ_TYPE);
2487 	}
2488 
2489 	if (id1) {
2490 		view->state.diff.id1 = got_object_id_dup(id1);
2491 		if (view->state.diff.id1 == NULL)
2492 			return got_error_from_errno("got_object_id_dup");
2493 	} else
2494 		view->state.diff.id1 = NULL;
2495 
2496 	view->state.diff.id2 = got_object_id_dup(id2);
2497 	if (view->state.diff.id2 == NULL) {
2498 		free(view->state.diff.id1);
2499 		view->state.diff.id1 = NULL;
2500 		return got_error_from_errno("got_object_id_dup");
2501 	}
2502 	view->state.diff.f = NULL;
2503 	view->state.diff.first_displayed_line = 1;
2504 	view->state.diff.last_displayed_line = view->nlines;
2505 	view->state.diff.diff_context = 3;
2506 	view->state.diff.log_view = log_view;
2507 	view->state.diff.repo = repo;
2508 	view->state.diff.refs = refs;
2509 
2510 	if (log_view && view_is_splitscreen(view))
2511 		show_log_view(log_view); /* draw vborder */
2512 	diff_view_indicate_progress(view);
2513 
2514 	err = create_diff(&view->state.diff);
2515 	if (err) {
2516 		free(view->state.diff.id1);
2517 		view->state.diff.id1 = NULL;
2518 		free(view->state.diff.id2);
2519 		view->state.diff.id2 = NULL;
2520 		return err;
2521 	}
2522 
2523 	view->show = show_diff_view;
2524 	view->input = input_diff_view;
2525 	view->close = close_diff_view;
2526 
2527 	return NULL;
2528 }
2529 
2530 static const struct got_error *
2531 close_diff_view(struct tog_view *view)
2532 {
2533 	const struct got_error *err = NULL;
2534 
2535 	free(view->state.diff.id1);
2536 	view->state.diff.id1 = NULL;
2537 	free(view->state.diff.id2);
2538 	view->state.diff.id2 = NULL;
2539 	if (view->state.diff.f && fclose(view->state.diff.f) == EOF)
2540 		err = got_error_from_errno("fclose");
2541 	return err;
2542 }
2543 
2544 static const struct got_error *
2545 show_diff_view(struct tog_view *view)
2546 {
2547 	const struct got_error *err;
2548 	struct tog_diff_view_state *s = &view->state.diff;
2549 	char *id_str1 = NULL, *id_str2, *header;
2550 
2551 	if (s->id1) {
2552 		err = got_object_id_str(&id_str1, s->id1);
2553 		if (err)
2554 			return err;
2555 	}
2556 	err = got_object_id_str(&id_str2, s->id2);
2557 	if (err)
2558 		return err;
2559 
2560 	if (asprintf(&header, "diff %s %s",
2561 	    id_str1 ? id_str1 : "/dev/null", id_str2) == -1) {
2562 		err = got_error_from_errno("asprintf");
2563 		free(id_str1);
2564 		free(id_str2);
2565 		return err;
2566 	}
2567 	free(id_str1);
2568 	free(id_str2);
2569 
2570 	return draw_file(view, s->f, &s->first_displayed_line,
2571 	    &s->last_displayed_line, &s->eof, view->nlines,
2572 	    header);
2573 }
2574 
2575 static const struct got_error *
2576 set_selected_commit(struct tog_diff_view_state *s,
2577     struct commit_queue_entry *entry)
2578 {
2579 	const struct got_error *err;
2580 	const struct got_object_id_queue *parent_ids;
2581 	struct got_commit_object *selected_commit;
2582 	struct got_object_qid *pid;
2583 
2584 	free(s->id2);
2585 	s->id2 = got_object_id_dup(entry->id);
2586 	if (s->id2 == NULL)
2587 		return got_error_from_errno("got_object_id_dup");
2588 
2589 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
2590 	if (err)
2591 		return err;
2592 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
2593 	free(s->id1);
2594 	pid = SIMPLEQ_FIRST(parent_ids);
2595 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
2596 	got_object_commit_close(selected_commit);
2597 	return NULL;
2598 }
2599 
2600 static const struct got_error *
2601 input_diff_view(struct tog_view **new_view, struct tog_view **dead_view,
2602     struct tog_view **focus_view, struct tog_view *view, int ch)
2603 {
2604 	const struct got_error *err = NULL;
2605 	struct tog_diff_view_state *s = &view->state.diff;
2606 	struct tog_log_view_state *ls;
2607 	struct commit_queue_entry *entry;
2608 	int i;
2609 
2610 	switch (ch) {
2611 	case 'k':
2612 	case KEY_UP:
2613 		if (s->first_displayed_line > 1)
2614 			s->first_displayed_line--;
2615 		break;
2616 	case KEY_PPAGE:
2617 	case CTRL('b'):
2618 		if (s->first_displayed_line == 1)
2619 			break;
2620 		i = 0;
2621 		while (i++ < view->nlines - 1 &&
2622 		    s->first_displayed_line > 1)
2623 			s->first_displayed_line--;
2624 		break;
2625 	case 'j':
2626 	case KEY_DOWN:
2627 		if (!s->eof)
2628 			s->first_displayed_line++;
2629 		break;
2630 	case KEY_NPAGE:
2631 	case CTRL('f'):
2632 	case ' ':
2633 		if (s->eof)
2634 			break;
2635 		i = 0;
2636 		while (!s->eof && i++ < view->nlines - 1) {
2637 			char *line;
2638 			line = parse_next_line(s->f, NULL);
2639 			s->first_displayed_line++;
2640 			if (line == NULL)
2641 				break;
2642 		}
2643 		break;
2644 	case '[':
2645 		if (s->diff_context > 0) {
2646 			s->diff_context--;
2647 			diff_view_indicate_progress(view);
2648 			err = create_diff(s);
2649 		}
2650 		break;
2651 	case ']':
2652 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
2653 			s->diff_context++;
2654 			diff_view_indicate_progress(view);
2655 			err = create_diff(s);
2656 		}
2657 		break;
2658 	case '<':
2659 	case ',':
2660 		if (s->log_view == NULL)
2661 			break;
2662 		ls = &s->log_view->state.log;
2663 		entry = TAILQ_PREV(ls->selected_entry,
2664 		    commit_queue_head, entry);
2665 		if (entry == NULL)
2666 			break;
2667 
2668 		err = input_log_view(NULL, NULL, NULL, s->log_view,
2669 		    KEY_UP);
2670 		if (err)
2671 			break;
2672 
2673 		err = set_selected_commit(s, entry);
2674 		if (err)
2675 			break;
2676 
2677 		s->first_displayed_line = 1;
2678 		s->last_displayed_line = view->nlines;
2679 
2680 		diff_view_indicate_progress(view);
2681 		err = create_diff(s);
2682 		break;
2683 	case '>':
2684 	case '.':
2685 		if (s->log_view == NULL)
2686 			break;
2687 		ls = &s->log_view->state.log;
2688 
2689 		if (TAILQ_NEXT(ls->selected_entry, entry) == NULL) {
2690 			ls->thread_args.commits_needed++;
2691 
2692 			/* Display "loading..." in log view. */
2693 			show_log_view(s->log_view);
2694 			update_panels();
2695 			doupdate();
2696 
2697 			err = trigger_log_thread(1 /* load_all */,
2698 			    &ls->thread_args.commits_needed,
2699 			    &ls->thread_args.log_complete,
2700 			    &ls->thread_args.need_commits);
2701 			if (err)
2702 				break;
2703 		}
2704 		err = input_log_view(NULL, NULL, NULL, s->log_view,
2705 		    KEY_DOWN);
2706 		if (err)
2707 			break;
2708 
2709 		entry = TAILQ_NEXT(ls->selected_entry, entry);
2710 		if (entry == NULL)
2711 			break;
2712 
2713 		err = set_selected_commit(s, entry);
2714 		if (err)
2715 			break;
2716 
2717 		s->first_displayed_line = 1;
2718 		s->last_displayed_line = view->nlines;
2719 
2720 		diff_view_indicate_progress(view);
2721 		err = create_diff(s);
2722 		break;
2723 	default:
2724 		break;
2725 	}
2726 
2727 	return err;
2728 }
2729 
2730 static const struct got_error *
2731 cmd_diff(int argc, char *argv[])
2732 {
2733 	const struct got_error *error = NULL;
2734 	struct got_repository *repo = NULL;
2735 	struct got_reflist_head refs;
2736 	struct got_object_id *id1 = NULL, *id2 = NULL;
2737 	char *repo_path = NULL;
2738 	char *id_str1 = NULL, *id_str2 = NULL;
2739 	int ch;
2740 	struct tog_view *view;
2741 
2742 	SIMPLEQ_INIT(&refs);
2743 
2744 #ifndef PROFILE
2745 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2746 	    NULL) == -1)
2747 		err(1, "pledge");
2748 #endif
2749 
2750 	while ((ch = getopt(argc, argv, "")) != -1) {
2751 		switch (ch) {
2752 		default:
2753 			usage_diff();
2754 			/* NOTREACHED */
2755 		}
2756 	}
2757 
2758 	argc -= optind;
2759 	argv += optind;
2760 
2761 	if (argc == 0) {
2762 		usage_diff(); /* TODO show local worktree changes */
2763 	} else if (argc == 2) {
2764 		repo_path = getcwd(NULL, 0);
2765 		if (repo_path == NULL)
2766 			return got_error_from_errno("getcwd");
2767 		id_str1 = argv[0];
2768 		id_str2 = argv[1];
2769 	} else if (argc == 3) {
2770 		repo_path = realpath(argv[0], NULL);
2771 		if (repo_path == NULL)
2772 			return got_error_from_errno2("realpath", argv[0]);
2773 		id_str1 = argv[1];
2774 		id_str2 = argv[2];
2775 	} else
2776 		usage_diff();
2777 
2778 	init_curses();
2779 
2780 	error = got_repo_open(&repo, repo_path);
2781 	if (error)
2782 		goto done;
2783 
2784 	error = apply_unveil(got_repo_get_path(repo), NULL);
2785 	if (error)
2786 		goto done;
2787 
2788 	error = got_object_resolve_id_str(&id1, repo, id_str1);
2789 	if (error)
2790 		goto done;
2791 
2792 	error = got_object_resolve_id_str(&id2, repo, id_str2);
2793 	if (error)
2794 		goto done;
2795 
2796 	error = got_ref_list(&refs, repo);
2797 	if (error)
2798 		goto done;
2799 
2800 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
2801 	if (view == NULL) {
2802 		error = got_error_from_errno("view_open");
2803 		goto done;
2804 	}
2805 	error = open_diff_view(view, id1, id2, NULL, &refs, repo);
2806 	if (error)
2807 		goto done;
2808 	error = view_loop(view);
2809 done:
2810 	free(repo_path);
2811 	got_repo_close(repo);
2812 	got_ref_list_free(&refs);
2813 	return error;
2814 }
2815 
2816 __dead static void
2817 usage_blame(void)
2818 {
2819 	endwin();
2820 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
2821 	    getprogname());
2822 	exit(1);
2823 }
2824 
2825 struct tog_blame_line {
2826 	int annotated;
2827 	struct got_object_id *id;
2828 };
2829 
2830 static const struct got_error *
2831 draw_blame(struct tog_view *view, struct got_object_id *id, FILE *f,
2832     const char *path, struct tog_blame_line *lines, int nlines,
2833     int blame_complete, int selected_line, int *first_displayed_line,
2834     int *last_displayed_line, int *eof, int max_lines)
2835 {
2836 	const struct got_error *err;
2837 	int lineno = 0, nprinted = 0;
2838 	char *line;
2839 	size_t len;
2840 	wchar_t *wline;
2841 	int width, wlimit;
2842 	struct tog_blame_line *blame_line;
2843 	struct got_object_id *prev_id = NULL;
2844 	char *id_str;
2845 
2846 	err = got_object_id_str(&id_str, id);
2847 	if (err)
2848 		return err;
2849 
2850 	rewind(f);
2851 	werase(view->window);
2852 
2853 	if (asprintf(&line, "commit %s", id_str) == -1) {
2854 		err = got_error_from_errno("asprintf");
2855 		free(id_str);
2856 		return err;
2857 	}
2858 
2859 	err = format_line(&wline, &width, line, view->ncols);
2860 	free(line);
2861 	line = NULL;
2862 	if (view_needs_focus_indication(view))
2863 		wstandout(view->window);
2864 	waddwstr(view->window, wline);
2865 	if (view_needs_focus_indication(view))
2866 		wstandend(view->window);
2867 	free(wline);
2868 	wline = NULL;
2869 	if (width < view->ncols - 1)
2870 		waddch(view->window, '\n');
2871 
2872 	if (asprintf(&line, "[%d/%d] %s%s",
2873 	    *first_displayed_line - 1 + selected_line, nlines,
2874 	    blame_complete ? "" : "annotating... ", path) == -1) {
2875 		free(id_str);
2876 		return got_error_from_errno("asprintf");
2877 	}
2878 	free(id_str);
2879 	err = format_line(&wline, &width, line, view->ncols);
2880 	free(line);
2881 	line = NULL;
2882 	if (err)
2883 		return err;
2884 	waddwstr(view->window, wline);
2885 	free(wline);
2886 	wline = NULL;
2887 	if (width < view->ncols - 1)
2888 		waddch(view->window, '\n');
2889 
2890 	*eof = 0;
2891 	while (nprinted < max_lines - 2) {
2892 		line = parse_next_line(f, &len);
2893 		if (line == NULL) {
2894 			*eof = 1;
2895 			break;
2896 		}
2897 		if (++lineno < *first_displayed_line) {
2898 			free(line);
2899 			continue;
2900 		}
2901 
2902 		wlimit = view->ncols < 9 ? 0 : view->ncols - 9;
2903 		err = format_line(&wline, &width, line, wlimit);
2904 		if (err) {
2905 			free(line);
2906 			return err;
2907 		}
2908 
2909 		if (view->focussed && nprinted == selected_line - 1)
2910 			wstandout(view->window);
2911 
2912 		blame_line = &lines[lineno - 1];
2913 		if (blame_line->annotated && prev_id &&
2914 		    got_object_id_cmp(prev_id, blame_line->id) == 0)
2915 			waddstr(view->window, "         ");
2916 		else if (blame_line->annotated) {
2917 			char *id_str;
2918 			err = got_object_id_str(&id_str, blame_line->id);
2919 			if (err) {
2920 				free(line);
2921 				free(wline);
2922 				return err;
2923 			}
2924 			wprintw(view->window, "%.8s ", id_str);
2925 			free(id_str);
2926 			prev_id = blame_line->id;
2927 		} else {
2928 			waddstr(view->window, "........ ");
2929 			prev_id = NULL;
2930 		}
2931 
2932 		waddwstr(view->window, wline);
2933 		while (width < wlimit) {
2934 			waddch(view->window, ' ');
2935 			width++;
2936 		}
2937 		if (view->focussed && nprinted == selected_line - 1)
2938 			wstandend(view->window);
2939 		if (++nprinted == 1)
2940 			*first_displayed_line = lineno;
2941 		free(line);
2942 		free(wline);
2943 		wline = NULL;
2944 	}
2945 	*last_displayed_line = lineno;
2946 
2947 	view_vborder(view);
2948 
2949 	return NULL;
2950 }
2951 
2952 static const struct got_error *
2953 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
2954 {
2955 	const struct got_error *err = NULL;
2956 	struct tog_blame_cb_args *a = arg;
2957 	struct tog_blame_line *line;
2958 	int errcode;
2959 
2960 	if (nlines != a->nlines ||
2961 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
2962 		return got_error(GOT_ERR_RANGE);
2963 
2964 	errcode = pthread_mutex_lock(&tog_mutex);
2965 	if (errcode)
2966 		return got_error_set_errno(errcode, "pthread_mutex_lock");
2967 
2968 	if (*a->quit) {	/* user has quit the blame view */
2969 		err = got_error(GOT_ERR_ITER_COMPLETED);
2970 		goto done;
2971 	}
2972 
2973 	if (lineno == -1)
2974 		goto done; /* no change in this commit */
2975 
2976 	line = &a->lines[lineno - 1];
2977 	if (line->annotated)
2978 		goto done;
2979 
2980 	line->id = got_object_id_dup(id);
2981 	if (line->id == NULL) {
2982 		err = got_error_from_errno("got_object_id_dup");
2983 		goto done;
2984 	}
2985 	line->annotated = 1;
2986 done:
2987 	errcode = pthread_mutex_unlock(&tog_mutex);
2988 	if (errcode)
2989 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
2990 	return err;
2991 }
2992 
2993 static void *
2994 blame_thread(void *arg)
2995 {
2996 	const struct got_error *err;
2997 	struct tog_blame_thread_args *ta = arg;
2998 	struct tog_blame_cb_args *a = ta->cb_args;
2999 	int errcode;
3000 
3001 	err = got_blame_incremental(ta->path, a->commit_id, ta->repo,
3002 	    blame_cb, ta->cb_args);
3003 
3004 	errcode = pthread_mutex_lock(&tog_mutex);
3005 	if (errcode)
3006 		return (void *)got_error_set_errno(errcode,
3007 		    "pthread_mutex_lock");
3008 
3009 	got_repo_close(ta->repo);
3010 	ta->repo = NULL;
3011 	*ta->complete = 1;
3012 
3013 	errcode = pthread_mutex_unlock(&tog_mutex);
3014 	if (errcode && err == NULL)
3015 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
3016 
3017 	return (void *)err;
3018 }
3019 
3020 static struct got_object_id *
3021 get_selected_commit_id(struct tog_blame_line *lines, int first_displayed_line,
3022     int selected_line)
3023 {
3024 	struct tog_blame_line *line;
3025 
3026 	line = &lines[first_displayed_line - 1 + selected_line - 1];
3027 	if (!line->annotated)
3028 		return NULL;
3029 
3030 	return line->id;
3031 }
3032 
3033 static const struct got_error *
3034 stop_blame(struct tog_blame *blame)
3035 {
3036 	const struct got_error *err = NULL;
3037 	int i;
3038 
3039 	if (blame->thread) {
3040 		int errcode;
3041 		errcode = pthread_mutex_unlock(&tog_mutex);
3042 		if (errcode)
3043 			return got_error_set_errno(errcode,
3044 			    "pthread_mutex_unlock");
3045 		errcode = pthread_join(blame->thread, (void **)&err);
3046 		if (errcode)
3047 			return got_error_set_errno(errcode, "pthread_join");
3048 		errcode = pthread_mutex_lock(&tog_mutex);
3049 		if (errcode)
3050 			return got_error_set_errno(errcode,
3051 			    "pthread_mutex_lock");
3052 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
3053 			err = NULL;
3054 		blame->thread = NULL;
3055 	}
3056 	if (blame->thread_args.repo) {
3057 		got_repo_close(blame->thread_args.repo);
3058 		blame->thread_args.repo = NULL;
3059 	}
3060 	if (blame->f) {
3061 		if (fclose(blame->f) != 0 && err == NULL)
3062 			err = got_error_from_errno("fclose");
3063 		blame->f = NULL;
3064 	}
3065 	if (blame->lines) {
3066 		for (i = 0; i < blame->nlines; i++)
3067 			free(blame->lines[i].id);
3068 		free(blame->lines);
3069 		blame->lines = NULL;
3070 	}
3071 	free(blame->cb_args.commit_id);
3072 	blame->cb_args.commit_id = NULL;
3073 
3074 	return err;
3075 }
3076 
3077 static const struct got_error *
3078 run_blame(struct tog_blame *blame, struct tog_view *view, int *blame_complete,
3079     int *first_displayed_line, int *last_displayed_line, int *selected_line,
3080     int *done, int *eof, const char *path, struct got_object_id *commit_id,
3081     struct got_repository *repo)
3082 {
3083 	const struct got_error *err = NULL;
3084 	struct got_blob_object *blob = NULL;
3085 	struct got_repository *thread_repo = NULL;
3086 	struct got_object_id *obj_id = NULL;
3087 	int obj_type;
3088 
3089 	err = got_object_id_by_path(&obj_id, repo, commit_id, path);
3090 	if (err)
3091 		return err;
3092 	if (obj_id == NULL)
3093 		return got_error(GOT_ERR_NO_OBJ);
3094 
3095 	err = got_object_get_type(&obj_type, repo, obj_id);
3096 	if (err)
3097 		goto done;
3098 
3099 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
3100 		err = got_error(GOT_ERR_OBJ_TYPE);
3101 		goto done;
3102 	}
3103 
3104 	err = got_object_open_as_blob(&blob, repo, obj_id, 8192);
3105 	if (err)
3106 		goto done;
3107 	blame->f = got_opentemp();
3108 	if (blame->f == NULL) {
3109 		err = got_error_from_errno("got_opentemp");
3110 		goto done;
3111 	}
3112 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
3113 	    blame->f, blob);
3114 	if (err)
3115 		goto done;
3116 
3117 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
3118 	if (blame->lines == NULL) {
3119 		err = got_error_from_errno("calloc");
3120 		goto done;
3121 	}
3122 
3123 	err = got_repo_open(&thread_repo, got_repo_get_path(repo));
3124 	if (err)
3125 		goto done;
3126 
3127 	blame->cb_args.view = view;
3128 	blame->cb_args.lines = blame->lines;
3129 	blame->cb_args.nlines = blame->nlines;
3130 	blame->cb_args.commit_id = got_object_id_dup(commit_id);
3131 	if (blame->cb_args.commit_id == NULL) {
3132 		err = got_error_from_errno("got_object_id_dup");
3133 		goto done;
3134 	}
3135 	blame->cb_args.quit = done;
3136 
3137 	blame->thread_args.path = path;
3138 	blame->thread_args.repo = thread_repo;
3139 	blame->thread_args.cb_args = &blame->cb_args;
3140 	blame->thread_args.complete = blame_complete;
3141 	*blame_complete = 0;
3142 
3143 done:
3144 	if (blob)
3145 		got_object_blob_close(blob);
3146 	free(obj_id);
3147 	if (err)
3148 		stop_blame(blame);
3149 	return err;
3150 }
3151 
3152 static const struct got_error *
3153 open_blame_view(struct tog_view *view, char *path,
3154     struct got_object_id *commit_id, struct got_reflist_head *refs,
3155     struct got_repository *repo)
3156 {
3157 	const struct got_error *err = NULL;
3158 	struct tog_blame_view_state *s = &view->state.blame;
3159 
3160 	SIMPLEQ_INIT(&s->blamed_commits);
3161 
3162 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
3163 	if (err)
3164 		return err;
3165 
3166 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
3167 	s->first_displayed_line = 1;
3168 	s->last_displayed_line = view->nlines;
3169 	s->selected_line = 1;
3170 	s->blame_complete = 0;
3171 	s->path = path;
3172 	if (s->path == NULL)
3173 		return got_error_from_errno("open_blame_view");
3174 	s->repo = repo;
3175 	s->refs = refs;
3176 	s->commit_id = commit_id;
3177 	memset(&s->blame, 0, sizeof(s->blame));
3178 
3179 	view->show = show_blame_view;
3180 	view->input = input_blame_view;
3181 	view->close = close_blame_view;
3182 
3183 	return run_blame(&s->blame, view, &s->blame_complete,
3184 	    &s->first_displayed_line, &s->last_displayed_line,
3185 	    &s->selected_line, &s->done, &s->eof, s->path,
3186 	    s->blamed_commit->id, s->repo);
3187 }
3188 
3189 static const struct got_error *
3190 close_blame_view(struct tog_view *view)
3191 {
3192 	const struct got_error *err = NULL;
3193 	struct tog_blame_view_state *s = &view->state.blame;
3194 
3195 	if (s->blame.thread)
3196 		err = stop_blame(&s->blame);
3197 
3198 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
3199 		struct got_object_qid *blamed_commit;
3200 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
3201 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
3202 		got_object_qid_free(blamed_commit);
3203 	}
3204 
3205 	free(s->path);
3206 
3207 	return err;
3208 }
3209 
3210 static const struct got_error *
3211 show_blame_view(struct tog_view *view)
3212 {
3213 	const struct got_error *err = NULL;
3214 	struct tog_blame_view_state *s = &view->state.blame;
3215 	int errcode;
3216 
3217 	if (s->blame.thread == NULL) {
3218 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
3219 		    &s->blame.thread_args);
3220 		if (errcode)
3221 			return got_error_set_errno(errcode, "pthread_create");
3222 	}
3223 
3224 	err = draw_blame(view, s->blamed_commit->id, s->blame.f,
3225 	    s->path, s->blame.lines, s->blame.nlines, s->blame_complete,
3226 	    s->selected_line, &s->first_displayed_line,
3227 	    &s->last_displayed_line, &s->eof, view->nlines);
3228 
3229 	view_vborder(view);
3230 	return err;
3231 }
3232 
3233 static const struct got_error *
3234 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
3235     struct tog_view **focus_view, struct tog_view *view, int ch)
3236 {
3237 	const struct got_error *err = NULL, *thread_err = NULL;
3238 	struct tog_view *diff_view;
3239 	struct tog_blame_view_state *s = &view->state.blame;
3240 	int begin_x = 0;
3241 
3242 	switch (ch) {
3243 	case 'q':
3244 		s->done = 1;
3245 		break;
3246 	case 'k':
3247 	case KEY_UP:
3248 		if (s->selected_line > 1)
3249 			s->selected_line--;
3250 		else if (s->selected_line == 1 &&
3251 		    s->first_displayed_line > 1)
3252 			s->first_displayed_line--;
3253 		break;
3254 	case KEY_PPAGE:
3255 		if (s->first_displayed_line == 1) {
3256 			s->selected_line = 1;
3257 			break;
3258 		}
3259 		if (s->first_displayed_line > view->nlines - 2)
3260 			s->first_displayed_line -=
3261 			    (view->nlines - 2);
3262 		else
3263 			s->first_displayed_line = 1;
3264 		break;
3265 	case 'j':
3266 	case KEY_DOWN:
3267 		if (s->selected_line < view->nlines - 2 &&
3268 		    s->first_displayed_line +
3269 		    s->selected_line <= s->blame.nlines)
3270 			s->selected_line++;
3271 		else if (s->last_displayed_line <
3272 		    s->blame.nlines)
3273 			s->first_displayed_line++;
3274 		break;
3275 	case 'b':
3276 	case 'p': {
3277 		struct got_object_id *id = NULL;
3278 		id = get_selected_commit_id(s->blame.lines,
3279 		    s->first_displayed_line, s->selected_line);
3280 		if (id == NULL)
3281 			break;
3282 		if (ch == 'p') {
3283 			struct got_commit_object *commit;
3284 			struct got_object_qid *pid;
3285 			struct got_object_id *blob_id = NULL;
3286 			int obj_type;
3287 			err = got_object_open_as_commit(&commit,
3288 			    s->repo, id);
3289 			if (err)
3290 				break;
3291 			pid = SIMPLEQ_FIRST(
3292 			    got_object_commit_get_parent_ids(commit));
3293 			if (pid == NULL) {
3294 				got_object_commit_close(commit);
3295 				break;
3296 			}
3297 			/* Check if path history ends here. */
3298 			err = got_object_id_by_path(&blob_id, s->repo,
3299 			    pid->id, s->path);
3300 			if (err) {
3301 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
3302 					err = NULL;
3303 				got_object_commit_close(commit);
3304 				break;
3305 			}
3306 			err = got_object_get_type(&obj_type, s->repo,
3307 			    blob_id);
3308 			free(blob_id);
3309 			/* Can't blame non-blob type objects. */
3310 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
3311 				got_object_commit_close(commit);
3312 				break;
3313 			}
3314 			err = got_object_qid_alloc(&s->blamed_commit,
3315 			    pid->id);
3316 			got_object_commit_close(commit);
3317 		} else {
3318 			if (got_object_id_cmp(id,
3319 			    s->blamed_commit->id) == 0)
3320 				break;
3321 			err = got_object_qid_alloc(&s->blamed_commit,
3322 			    id);
3323 		}
3324 		if (err)
3325 			break;
3326 		s->done = 1;
3327 		thread_err = stop_blame(&s->blame);
3328 		s->done = 0;
3329 		if (thread_err)
3330 			break;
3331 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
3332 		    s->blamed_commit, entry);
3333 		err = run_blame(&s->blame, view, &s->blame_complete,
3334 		    &s->first_displayed_line, &s->last_displayed_line,
3335 		    &s->selected_line, &s->done, &s->eof,
3336 		    s->path, s->blamed_commit->id, s->repo);
3337 		if (err)
3338 			break;
3339 		break;
3340 	}
3341 	case 'B': {
3342 		struct got_object_qid *first;
3343 		first = SIMPLEQ_FIRST(&s->blamed_commits);
3344 		if (!got_object_id_cmp(first->id, s->commit_id))
3345 			break;
3346 		s->done = 1;
3347 		thread_err = stop_blame(&s->blame);
3348 		s->done = 0;
3349 		if (thread_err)
3350 			break;
3351 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
3352 		got_object_qid_free(s->blamed_commit);
3353 		s->blamed_commit =
3354 		    SIMPLEQ_FIRST(&s->blamed_commits);
3355 		err = run_blame(&s->blame, view, &s->blame_complete,
3356 		    &s->first_displayed_line, &s->last_displayed_line,
3357 		    &s->selected_line, &s->done, &s->eof, s->path,
3358 		    s->blamed_commit->id, s->repo);
3359 		if (err)
3360 			break;
3361 		break;
3362 	}
3363 	case KEY_ENTER:
3364 	case '\r': {
3365 		struct got_object_id *id = NULL;
3366 		struct got_object_qid *pid;
3367 		struct got_commit_object *commit = NULL;
3368 		id = get_selected_commit_id(s->blame.lines,
3369 		    s->first_displayed_line, s->selected_line);
3370 		if (id == NULL)
3371 			break;
3372 		err = got_object_open_as_commit(&commit, s->repo, id);
3373 		if (err)
3374 			break;
3375 		pid = SIMPLEQ_FIRST(
3376 		    got_object_commit_get_parent_ids(commit));
3377 		if (view_is_parent_view(view))
3378 		    begin_x = view_split_begin_x(view->begin_x);
3379 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
3380 		if (diff_view == NULL) {
3381 			got_object_commit_close(commit);
3382 			err = got_error_from_errno("view_open");
3383 			break;
3384 		}
3385 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
3386 		    id, NULL, s->refs, s->repo);
3387 		got_object_commit_close(commit);
3388 		if (err) {
3389 			view_close(diff_view);
3390 			break;
3391 		}
3392 		if (view_is_parent_view(view)) {
3393 			err = view_close_child(view);
3394 			if (err)
3395 				break;
3396 			err = view_set_child(view, diff_view);
3397 			if (err) {
3398 				view_close(diff_view);
3399 				break;
3400 			}
3401 			*focus_view = diff_view;
3402 			view->child_focussed = 1;
3403 		} else
3404 			*new_view = diff_view;
3405 		if (err)
3406 			break;
3407 		break;
3408 	}
3409 	case KEY_NPAGE:
3410 	case ' ':
3411 		if (s->last_displayed_line >= s->blame.nlines &&
3412 		    s->selected_line >= MIN(s->blame.nlines,
3413 		    view->nlines - 2)) {
3414 			break;
3415 		}
3416 		if (s->last_displayed_line >= s->blame.nlines &&
3417 		    s->selected_line < view->nlines - 2) {
3418 			s->selected_line = MIN(s->blame.nlines,
3419 			    view->nlines - 2);
3420 			break;
3421 		}
3422 		if (s->last_displayed_line + view->nlines - 2
3423 		    <= s->blame.nlines)
3424 			s->first_displayed_line +=
3425 			    view->nlines - 2;
3426 		else
3427 			s->first_displayed_line =
3428 			    s->blame.nlines -
3429 			    (view->nlines - 3);
3430 		break;
3431 	case KEY_RESIZE:
3432 		if (s->selected_line > view->nlines - 2) {
3433 			s->selected_line = MIN(s->blame.nlines,
3434 			    view->nlines - 2);
3435 		}
3436 		break;
3437 	default:
3438 		break;
3439 	}
3440 	return thread_err ? thread_err : err;
3441 }
3442 
3443 static const struct got_error *
3444 cmd_blame(int argc, char *argv[])
3445 {
3446 	const struct got_error *error;
3447 	struct got_repository *repo = NULL;
3448 	struct got_reflist_head refs;
3449 	struct got_worktree *worktree = NULL;
3450 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
3451 	struct got_object_id *commit_id = NULL;
3452 	char *commit_id_str = NULL;
3453 	int ch;
3454 	struct tog_view *view;
3455 
3456 	SIMPLEQ_INIT(&refs);
3457 
3458 #ifndef PROFILE
3459 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
3460 	    NULL) == -1)
3461 		err(1, "pledge");
3462 #endif
3463 
3464 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
3465 		switch (ch) {
3466 		case 'c':
3467 			commit_id_str = optarg;
3468 			break;
3469 		case 'r':
3470 			repo_path = realpath(optarg, NULL);
3471 			if (repo_path == NULL)
3472 				err(1, "-r option");
3473 			break;
3474 		default:
3475 			usage_blame();
3476 			/* NOTREACHED */
3477 		}
3478 	}
3479 
3480 	argc -= optind;
3481 	argv += optind;
3482 
3483 	if (argc == 1)
3484 		path = argv[0];
3485 	else
3486 		usage_blame();
3487 
3488 	cwd = getcwd(NULL, 0);
3489 	if (cwd == NULL) {
3490 		error = got_error_from_errno("getcwd");
3491 		goto done;
3492 	}
3493 	if (repo_path == NULL) {
3494 		error = got_worktree_open(&worktree, cwd);
3495 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3496 			goto done;
3497 		else
3498 			error = NULL;
3499 		if (worktree) {
3500 			repo_path =
3501 			    strdup(got_worktree_get_repo_path(worktree));
3502 			if (repo_path == NULL)
3503 				error = got_error_from_errno("strdup");
3504 			if (error)
3505 				goto done;
3506 		} else {
3507 			repo_path = strdup(cwd);
3508 			if (repo_path == NULL) {
3509 				error = got_error_from_errno("strdup");
3510 				goto done;
3511 			}
3512 		}
3513 	}
3514 
3515 	init_curses();
3516 
3517 	error = got_repo_open(&repo, repo_path);
3518 	if (error != NULL)
3519 		goto done;
3520 
3521 	error = apply_unveil(got_repo_get_path(repo), NULL);
3522 	if (error)
3523 		goto done;
3524 
3525 	if (worktree) {
3526 		const char *prefix = got_worktree_get_path_prefix(worktree);
3527 		char *p, *worktree_subdir = cwd +
3528 		    strlen(got_worktree_get_root_path(worktree));
3529 		if (asprintf(&p, "%s%s%s%s%s",
3530 		    prefix, (strcmp(prefix, "/") != 0) ? "/" : "",
3531 		    worktree_subdir, worktree_subdir[0] ? "/" : "",
3532 		    path) == -1) {
3533 			error = got_error_from_errno("asprintf");
3534 			goto done;
3535 		}
3536 		error = got_repo_map_path(&in_repo_path, repo, p, 0);
3537 		free(p);
3538 	} else {
3539 		error = got_repo_map_path(&in_repo_path, repo, path, 1);
3540 	}
3541 	if (error)
3542 		goto done;
3543 
3544 	if (commit_id_str == NULL) {
3545 		struct got_reference *head_ref;
3546 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0);
3547 		if (error != NULL)
3548 			goto done;
3549 		error = got_ref_resolve(&commit_id, repo, head_ref);
3550 		got_ref_close(head_ref);
3551 	} else {
3552 		error = got_object_resolve_id_str(&commit_id, repo,
3553 		    commit_id_str);
3554 	}
3555 	if (error != NULL)
3556 		goto done;
3557 
3558 	error = got_ref_list(&refs, repo);
3559 	if (error)
3560 		goto done;
3561 
3562 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
3563 	if (view == NULL) {
3564 		error = got_error_from_errno("view_open");
3565 		goto done;
3566 	}
3567 	error = open_blame_view(view, in_repo_path, commit_id, &refs, repo);
3568 	if (error)
3569 		goto done;
3570 	error = view_loop(view);
3571 done:
3572 	free(repo_path);
3573 	free(cwd);
3574 	free(commit_id);
3575 	if (worktree)
3576 		got_worktree_close(worktree);
3577 	if (repo)
3578 		got_repo_close(repo);
3579 	got_ref_list_free(&refs);
3580 	return error;
3581 }
3582 
3583 static const struct got_error *
3584 draw_tree_entries(struct tog_view *view,
3585     struct got_tree_entry **first_displayed_entry,
3586     struct got_tree_entry **last_displayed_entry,
3587     struct got_tree_entry **selected_entry, int *ndisplayed,
3588     const char *label, int show_ids, const char *parent_path,
3589     const struct got_tree_entries *entries, int selected, int limit, int isroot)
3590 {
3591 	const struct got_error *err = NULL;
3592 	struct got_tree_entry *te;
3593 	wchar_t *wline;
3594 	int width, n;
3595 
3596 	*ndisplayed = 0;
3597 
3598 	werase(view->window);
3599 
3600 	if (limit == 0)
3601 		return NULL;
3602 
3603 	err = format_line(&wline, &width, label, view->ncols);
3604 	if (err)
3605 		return err;
3606 	if (view_needs_focus_indication(view))
3607 		wstandout(view->window);
3608 	waddwstr(view->window, wline);
3609 	if (view_needs_focus_indication(view))
3610 		wstandend(view->window);
3611 	free(wline);
3612 	wline = NULL;
3613 	if (width < view->ncols - 1)
3614 		waddch(view->window, '\n');
3615 	if (--limit <= 0)
3616 		return NULL;
3617 	err = format_line(&wline, &width, parent_path, view->ncols);
3618 	if (err)
3619 		return err;
3620 	waddwstr(view->window, wline);
3621 	free(wline);
3622 	wline = NULL;
3623 	if (width < view->ncols - 1)
3624 		waddch(view->window, '\n');
3625 	if (--limit <= 0)
3626 		return NULL;
3627 	waddch(view->window, '\n');
3628 	if (--limit <= 0)
3629 		return NULL;
3630 
3631 	te = SIMPLEQ_FIRST(&entries->head);
3632 	if (*first_displayed_entry == NULL) {
3633 		if (selected == 0) {
3634 			if (view->focussed)
3635 				wstandout(view->window);
3636 			*selected_entry = NULL;
3637 		}
3638 		waddstr(view->window, "  ..\n");	/* parent directory */
3639 		if (selected == 0 && view->focussed)
3640 			wstandend(view->window);
3641 		(*ndisplayed)++;
3642 		if (--limit <= 0)
3643 			return NULL;
3644 		n = 1;
3645 	} else {
3646 		n = 0;
3647 		while (te != *first_displayed_entry)
3648 			te = SIMPLEQ_NEXT(te, entry);
3649 	}
3650 
3651 	while (te) {
3652 		char *line = NULL, *id_str = NULL;
3653 
3654 		if (show_ids) {
3655 			err = got_object_id_str(&id_str, te->id);
3656 			if (err)
3657 				return got_error_from_errno(
3658 				    "got_object_id_str");
3659 		}
3660 		if (asprintf(&line, "%s  %s%s", id_str ? id_str : "",
3661 		    te->name, S_ISDIR(te->mode) ? "/" :
3662 		    ((te->mode & S_IXUSR) ? "*" : "")) == -1) {
3663 			free(id_str);
3664 			return got_error_from_errno("asprintf");
3665 		}
3666 		free(id_str);
3667 		err = format_line(&wline, &width, line, view->ncols);
3668 		if (err) {
3669 			free(line);
3670 			break;
3671 		}
3672 		if (n == selected) {
3673 			if (view->focussed)
3674 				wstandout(view->window);
3675 			*selected_entry = te;
3676 		}
3677 		waddwstr(view->window, wline);
3678 		if (width < view->ncols - 1)
3679 			waddch(view->window, '\n');
3680 		if (n == selected && view->focussed)
3681 			wstandend(view->window);
3682 		free(line);
3683 		free(wline);
3684 		wline = NULL;
3685 		n++;
3686 		(*ndisplayed)++;
3687 		*last_displayed_entry = te;
3688 		if (--limit <= 0)
3689 			break;
3690 		te = SIMPLEQ_NEXT(te, entry);
3691 	}
3692 
3693 	return err;
3694 }
3695 
3696 static void
3697 tree_scroll_up(struct tog_view *view,
3698     struct got_tree_entry **first_displayed_entry, int maxscroll,
3699     const struct got_tree_entries *entries, int isroot)
3700 {
3701 	struct got_tree_entry *te, *prev;
3702 	int i;
3703 
3704 	if (*first_displayed_entry == NULL)
3705 		return;
3706 
3707 	te = SIMPLEQ_FIRST(&entries->head);
3708 	if (*first_displayed_entry == te) {
3709 		if (!isroot)
3710 			*first_displayed_entry = NULL;
3711 		return;
3712 	}
3713 
3714 	/* XXX this is stupid... switch to TAILQ? */
3715 	for (i = 0; i < maxscroll; i++) {
3716 		while (te != *first_displayed_entry) {
3717 			prev = te;
3718 			te = SIMPLEQ_NEXT(te, entry);
3719 		}
3720 		*first_displayed_entry = prev;
3721 		te = SIMPLEQ_FIRST(&entries->head);
3722 	}
3723 	if (!isroot && te == SIMPLEQ_FIRST(&entries->head) && i < maxscroll)
3724 		*first_displayed_entry = NULL;
3725 }
3726 
3727 static int
3728 tree_scroll_down(struct got_tree_entry **first_displayed_entry, int maxscroll,
3729 	struct got_tree_entry *last_displayed_entry,
3730 	const struct got_tree_entries *entries)
3731 {
3732 	struct got_tree_entry *next, *last;
3733 	int n = 0;
3734 
3735 	if (*first_displayed_entry)
3736 		next = SIMPLEQ_NEXT(*first_displayed_entry, entry);
3737 	else
3738 		next = SIMPLEQ_FIRST(&entries->head);
3739 	last = last_displayed_entry;
3740 	while (next && last && n++ < maxscroll) {
3741 		last = SIMPLEQ_NEXT(last, entry);
3742 		if (last) {
3743 			*first_displayed_entry = next;
3744 			next = SIMPLEQ_NEXT(next, entry);
3745 		}
3746 	}
3747 	return n;
3748 }
3749 
3750 static const struct got_error *
3751 tree_entry_path(char **path, struct tog_parent_trees *parents,
3752     struct got_tree_entry *te)
3753 {
3754 	const struct got_error *err = NULL;
3755 	struct tog_parent_tree *pt;
3756 	size_t len = 2; /* for leading slash and NUL */
3757 
3758 	TAILQ_FOREACH(pt, parents, entry)
3759 		len += strlen(pt->selected_entry->name) + 1 /* slash */;
3760 	if (te)
3761 		len += strlen(te->name);
3762 
3763 	*path = calloc(1, len);
3764 	if (path == NULL)
3765 		return got_error_from_errno("calloc");
3766 
3767 	(*path)[0] = '/';
3768 	pt = TAILQ_LAST(parents, tog_parent_trees);
3769 	while (pt) {
3770 		if (strlcat(*path, pt->selected_entry->name, len) >= len) {
3771 			err = got_error(GOT_ERR_NO_SPACE);
3772 			goto done;
3773 		}
3774 		if (strlcat(*path, "/", len) >= len) {
3775 			err = got_error(GOT_ERR_NO_SPACE);
3776 			goto done;
3777 		}
3778 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
3779 	}
3780 	if (te) {
3781 		if (strlcat(*path, te->name, len) >= len) {
3782 			err = got_error(GOT_ERR_NO_SPACE);
3783 			goto done;
3784 		}
3785 	}
3786 done:
3787 	if (err) {
3788 		free(*path);
3789 		*path = NULL;
3790 	}
3791 	return err;
3792 }
3793 
3794 static const struct got_error *
3795 blame_tree_entry(struct tog_view **new_view, int begin_x,
3796     struct got_tree_entry *te, struct tog_parent_trees *parents,
3797     struct got_object_id *commit_id, struct got_reflist_head *refs,
3798     struct got_repository *repo)
3799 {
3800 	const struct got_error *err = NULL;
3801 	char *path;
3802 	struct tog_view *blame_view;
3803 
3804 	err = tree_entry_path(&path, parents, te);
3805 	if (err)
3806 		return err;
3807 
3808 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
3809 	if (blame_view == NULL)
3810 		return got_error_from_errno("view_open");
3811 
3812 	err = open_blame_view(blame_view, path, commit_id, refs, repo);
3813 	if (err) {
3814 		view_close(blame_view);
3815 		free(path);
3816 	} else
3817 		*new_view = blame_view;
3818 	return err;
3819 }
3820 
3821 static const struct got_error *
3822 log_tree_entry(struct tog_view **new_view, int begin_x,
3823     struct got_tree_entry *te, struct tog_parent_trees *parents,
3824     struct got_object_id *commit_id, struct got_reflist_head *refs,
3825     struct got_repository *repo)
3826 {
3827 	struct tog_view *log_view;
3828 	const struct got_error *err = NULL;
3829 	char *path;
3830 
3831 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
3832 	if (log_view == NULL)
3833 		return got_error_from_errno("view_open");
3834 
3835 	err = tree_entry_path(&path, parents, te);
3836 	if (err)
3837 		return err;
3838 
3839 	err = open_log_view(log_view, commit_id, refs, repo, path, 0);
3840 	if (err)
3841 		view_close(log_view);
3842 	else
3843 		*new_view = log_view;
3844 	free(path);
3845 	return err;
3846 }
3847 
3848 static const struct got_error *
3849 open_tree_view(struct tog_view *view, struct got_tree_object *root,
3850     struct got_object_id *commit_id, struct got_reflist_head *refs,
3851     struct got_repository *repo)
3852 {
3853 	const struct got_error *err = NULL;
3854 	char *commit_id_str = NULL;
3855 	struct tog_tree_view_state *s = &view->state.tree;
3856 
3857 	TAILQ_INIT(&s->parents);
3858 
3859 	err = got_object_id_str(&commit_id_str, commit_id);
3860 	if (err != NULL)
3861 		goto done;
3862 
3863 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
3864 		err = got_error_from_errno("asprintf");
3865 		goto done;
3866 	}
3867 
3868 	s->root = s->tree = root;
3869 	s->entries = got_object_tree_get_entries(root);
3870 	s->first_displayed_entry = SIMPLEQ_FIRST(&s->entries->head);
3871 	s->commit_id = got_object_id_dup(commit_id);
3872 	if (s->commit_id == NULL) {
3873 		err = got_error_from_errno("got_object_id_dup");
3874 		goto done;
3875 	}
3876 	s->refs = refs;
3877 	s->repo = repo;
3878 
3879 	view->show = show_tree_view;
3880 	view->input = input_tree_view;
3881 	view->close = close_tree_view;
3882 done:
3883 	free(commit_id_str);
3884 	if (err) {
3885 		free(s->tree_label);
3886 		s->tree_label = NULL;
3887 	}
3888 	return err;
3889 }
3890 
3891 static const struct got_error *
3892 close_tree_view(struct tog_view *view)
3893 {
3894 	struct tog_tree_view_state *s = &view->state.tree;
3895 
3896 	free(s->tree_label);
3897 	s->tree_label = NULL;
3898 	free(s->commit_id);
3899 	s->commit_id = NULL;
3900 	while (!TAILQ_EMPTY(&s->parents)) {
3901 		struct tog_parent_tree *parent;
3902 		parent = TAILQ_FIRST(&s->parents);
3903 		TAILQ_REMOVE(&s->parents, parent, entry);
3904 		free(parent);
3905 
3906 	}
3907 	if (s->tree != s->root)
3908 		got_object_tree_close(s->tree);
3909 	got_object_tree_close(s->root);
3910 
3911 	return NULL;
3912 }
3913 
3914 static const struct got_error *
3915 show_tree_view(struct tog_view *view)
3916 {
3917 	const struct got_error *err = NULL;
3918 	struct tog_tree_view_state *s = &view->state.tree;
3919 	char *parent_path;
3920 
3921 	err = tree_entry_path(&parent_path, &s->parents, NULL);
3922 	if (err)
3923 		return err;
3924 
3925 	err = draw_tree_entries(view, &s->first_displayed_entry,
3926 	    &s->last_displayed_entry, &s->selected_entry,
3927 	    &s->ndisplayed, s->tree_label, s->show_ids, parent_path,
3928 	    s->entries, s->selected, view->nlines, s->tree == s->root);
3929 	free(parent_path);
3930 
3931 	view_vborder(view);
3932 	return err;
3933 }
3934 
3935 static const struct got_error *
3936 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
3937     struct tog_view **focus_view, struct tog_view *view, int ch)
3938 {
3939 	const struct got_error *err = NULL;
3940 	struct tog_tree_view_state *s = &view->state.tree;
3941 	struct tog_view *log_view;
3942 	int begin_x = 0, nscrolled;
3943 
3944 	switch (ch) {
3945 	case 'i':
3946 		s->show_ids = !s->show_ids;
3947 		break;
3948 	case 'l':
3949 		if (!s->selected_entry)
3950 			break;
3951 		if (view_is_parent_view(view))
3952 			begin_x = view_split_begin_x(view->begin_x);
3953 		err = log_tree_entry(&log_view, begin_x,
3954 		    s->selected_entry, &s->parents,
3955 		    s->commit_id, s->refs, s->repo);
3956 		if (view_is_parent_view(view)) {
3957 			err = view_close_child(view);
3958 			if (err)
3959 				return err;
3960 			err = view_set_child(view, log_view);
3961 			if (err) {
3962 				view_close(log_view);
3963 				break;
3964 			}
3965 			*focus_view = log_view;
3966 			view->child_focussed = 1;
3967 		} else
3968 			*new_view = log_view;
3969 		break;
3970 	case 'k':
3971 	case KEY_UP:
3972 		if (s->selected > 0) {
3973 			s->selected--;
3974 			if (s->selected == 0)
3975 				break;
3976 		}
3977 		if (s->selected > 0)
3978 			break;
3979 		tree_scroll_up(view, &s->first_displayed_entry, 1,
3980 		    s->entries, s->tree == s->root);
3981 		break;
3982 	case KEY_PPAGE:
3983 		tree_scroll_up(view, &s->first_displayed_entry,
3984 		    MAX(0, view->nlines - 4 - s->selected), s->entries,
3985 		    s->tree == s->root);
3986 		s->selected = 0;
3987 		if (SIMPLEQ_FIRST(&s->entries->head) ==
3988 		    s->first_displayed_entry && s->tree != s->root)
3989 			s->first_displayed_entry = NULL;
3990 		break;
3991 	case 'j':
3992 	case KEY_DOWN:
3993 		if (s->selected < s->ndisplayed - 1) {
3994 			s->selected++;
3995 			break;
3996 		}
3997 		if (SIMPLEQ_NEXT(s->last_displayed_entry, entry) == NULL)
3998 			/* can't scroll any further */
3999 			break;
4000 		tree_scroll_down(&s->first_displayed_entry, 1,
4001 		    s->last_displayed_entry, s->entries);
4002 		break;
4003 	case KEY_NPAGE:
4004 		if (SIMPLEQ_NEXT(s->last_displayed_entry, entry)
4005 		    == NULL) {
4006 			/* can't scroll any further; move cursor down */
4007 			if (s->selected < s->ndisplayed - 1)
4008 				s->selected = s->ndisplayed - 1;
4009 			break;
4010 		}
4011 		nscrolled = tree_scroll_down(&s->first_displayed_entry,
4012 		    view->nlines, s->last_displayed_entry, s->entries);
4013 		if (nscrolled < view->nlines) {
4014 			int ndisplayed = 0;
4015 			struct got_tree_entry *te;
4016 			te = s->first_displayed_entry;
4017 			do {
4018 				ndisplayed++;
4019 				te = SIMPLEQ_NEXT(te, entry);
4020 			} while (te);
4021 			s->selected = ndisplayed - 1;
4022 		}
4023 		break;
4024 	case KEY_ENTER:
4025 	case '\r':
4026 	case KEY_BACKSPACE:
4027 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
4028 			struct tog_parent_tree *parent;
4029 			/* user selected '..' */
4030 			if (s->tree == s->root)
4031 				break;
4032 			parent = TAILQ_FIRST(&s->parents);
4033 			TAILQ_REMOVE(&s->parents, parent,
4034 			    entry);
4035 			got_object_tree_close(s->tree);
4036 			s->tree = parent->tree;
4037 			s->entries =
4038 			    got_object_tree_get_entries(s->tree);
4039 			s->first_displayed_entry =
4040 			    parent->first_displayed_entry;
4041 			s->selected_entry =
4042 			    parent->selected_entry;
4043 			s->selected = parent->selected;
4044 			free(parent);
4045 		} else if (S_ISDIR(s->selected_entry->mode)) {
4046 			struct got_tree_object *subtree;
4047 			err = got_object_open_as_tree(&subtree,
4048 			    s->repo, s->selected_entry->id);
4049 			if (err)
4050 				break;
4051 			err = tree_view_visit_subtree(subtree, s);
4052 			if (err) {
4053 				got_object_tree_close(subtree);
4054 				break;
4055 			}
4056 		} else if (S_ISREG(s->selected_entry->mode)) {
4057 			struct tog_view *blame_view;
4058 			int begin_x = view_is_parent_view(view) ?
4059 			    view_split_begin_x(view->begin_x) : 0;
4060 
4061 			err = blame_tree_entry(&blame_view, begin_x,
4062 			    s->selected_entry, &s->parents,
4063 			    s->commit_id, s->refs, s->repo);
4064 			if (err)
4065 				break;
4066 			if (view_is_parent_view(view)) {
4067 				err = view_close_child(view);
4068 				if (err)
4069 					return err;
4070 				err = view_set_child(view, blame_view);
4071 				if (err) {
4072 					view_close(blame_view);
4073 					break;
4074 				}
4075 				*focus_view = blame_view;
4076 				view->child_focussed = 1;
4077 			} else
4078 				*new_view = blame_view;
4079 		}
4080 		break;
4081 	case KEY_RESIZE:
4082 		if (s->selected > view->nlines)
4083 			s->selected = s->ndisplayed - 1;
4084 		break;
4085 	default:
4086 		break;
4087 	}
4088 
4089 	return err;
4090 }
4091 
4092 __dead static void
4093 usage_tree(void)
4094 {
4095 	endwin();
4096 	fprintf(stderr, "usage: %s tree [-c commit] [repository-path]\n",
4097 	    getprogname());
4098 	exit(1);
4099 }
4100 
4101 static const struct got_error *
4102 cmd_tree(int argc, char *argv[])
4103 {
4104 	const struct got_error *error;
4105 	struct got_repository *repo = NULL;
4106 	struct got_reflist_head refs;
4107 	char *repo_path = NULL;
4108 	struct got_object_id *commit_id = NULL;
4109 	char *commit_id_arg = NULL;
4110 	struct got_commit_object *commit = NULL;
4111 	struct got_tree_object *tree = NULL;
4112 	int ch;
4113 	struct tog_view *view;
4114 
4115 	SIMPLEQ_INIT(&refs);
4116 
4117 #ifndef PROFILE
4118 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4119 	    NULL) == -1)
4120 		err(1, "pledge");
4121 #endif
4122 
4123 	while ((ch = getopt(argc, argv, "c:")) != -1) {
4124 		switch (ch) {
4125 		case 'c':
4126 			commit_id_arg = optarg;
4127 			break;
4128 		default:
4129 			usage_tree();
4130 			/* NOTREACHED */
4131 		}
4132 	}
4133 
4134 	argc -= optind;
4135 	argv += optind;
4136 
4137 	if (argc == 0) {
4138 		struct got_worktree *worktree;
4139 		char *cwd = getcwd(NULL, 0);
4140 		if (cwd == NULL)
4141 			return got_error_from_errno("getcwd");
4142 		error = got_worktree_open(&worktree, cwd);
4143 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4144 			goto done;
4145 		if (worktree) {
4146 			free(cwd);
4147 			repo_path =
4148 			    strdup(got_worktree_get_repo_path(worktree));
4149 			got_worktree_close(worktree);
4150 		} else
4151 			repo_path = cwd;
4152 		if (repo_path == NULL) {
4153 			error = got_error_from_errno("strdup");
4154 			goto done;
4155 		}
4156 	} else if (argc == 1) {
4157 		repo_path = realpath(argv[0], NULL);
4158 		if (repo_path == NULL)
4159 			return got_error_from_errno2("realpath", argv[0]);
4160 	} else
4161 		usage_log();
4162 
4163 	init_curses();
4164 
4165 	error = got_repo_open(&repo, repo_path);
4166 	if (error != NULL)
4167 		goto done;
4168 
4169 	error = apply_unveil(got_repo_get_path(repo), NULL);
4170 	if (error)
4171 		goto done;
4172 
4173 	if (commit_id_arg == NULL)
4174 		error = get_head_commit_id(&commit_id, GOT_REF_HEAD, repo);
4175 	else
4176 		error = got_object_resolve_id_str(&commit_id, repo,
4177 		    commit_id_arg);
4178 	if (error != NULL)
4179 		goto done;
4180 
4181 	error = got_object_open_as_commit(&commit, repo, commit_id);
4182 	if (error != NULL)
4183 		goto done;
4184 
4185 	error = got_object_open_as_tree(&tree, repo,
4186 	    got_object_commit_get_tree_id(commit));
4187 	if (error != NULL)
4188 		goto done;
4189 
4190 	error = got_ref_list(&refs, repo);
4191 	if (error)
4192 		goto done;
4193 
4194 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
4195 	if (view == NULL) {
4196 		error = got_error_from_errno("view_open");
4197 		goto done;
4198 	}
4199 	error = open_tree_view(view, tree, commit_id, &refs, repo);
4200 	if (error)
4201 		goto done;
4202 	error = view_loop(view);
4203 done:
4204 	free(repo_path);
4205 	free(commit_id);
4206 	if (commit)
4207 		got_object_commit_close(commit);
4208 	if (tree)
4209 		got_object_tree_close(tree);
4210 	if (repo)
4211 		got_repo_close(repo);
4212 	got_ref_list_free(&refs);
4213 	return error;
4214 }
4215 
4216 __dead static void
4217 usage(void)
4218 {
4219 	int i;
4220 
4221 	fprintf(stderr, "usage: %s [-h] [command] [arg ...]\n\n"
4222 	    "Available commands:\n", getprogname());
4223 	for (i = 0; i < nitems(tog_commands); i++) {
4224 		struct tog_cmd *cmd = &tog_commands[i];
4225 		fprintf(stderr, "    %s: %s\n", cmd->name, cmd->descr);
4226 	}
4227 	exit(1);
4228 }
4229 
4230 static char **
4231 make_argv(const char *arg0, const char *arg1)
4232 {
4233 	char **argv;
4234 	int argc = (arg1 == NULL ? 1 : 2);
4235 
4236 	argv = calloc(argc, sizeof(char *));
4237 	if (argv == NULL)
4238 		err(1, "calloc");
4239 	argv[0] = strdup(arg0);
4240 	if (argv[0] == NULL)
4241 		err(1, "calloc");
4242 	if (arg1) {
4243 		argv[1] = strdup(arg1);
4244 		if (argv[1] == NULL)
4245 			err(1, "calloc");
4246 	}
4247 
4248 	return argv;
4249 }
4250 
4251 int
4252 main(int argc, char *argv[])
4253 {
4254 	const struct got_error *error = NULL;
4255 	struct tog_cmd *cmd = NULL;
4256 	int ch, hflag = 0;
4257 	char **cmd_argv = NULL;
4258 
4259 	setlocale(LC_CTYPE, "");
4260 
4261 	while ((ch = getopt(argc, argv, "h")) != -1) {
4262 		switch (ch) {
4263 		case 'h':
4264 			hflag = 1;
4265 			break;
4266 		default:
4267 			usage();
4268 			/* NOTREACHED */
4269 		}
4270 	}
4271 
4272 	argc -= optind;
4273 	argv += optind;
4274 	optind = 0;
4275 	optreset = 1;
4276 
4277 	if (argc == 0) {
4278 		if (hflag)
4279 			usage();
4280 		/* Build an argument vector which runs a default command. */
4281 		cmd = &tog_commands[0];
4282 		cmd_argv = make_argv(cmd->name, NULL);
4283 		argc = 1;
4284 	} else {
4285 		int i;
4286 
4287 		/* Did the user specific a command? */
4288 		for (i = 0; i < nitems(tog_commands); i++) {
4289 			if (strncmp(tog_commands[i].name, argv[0],
4290 			    strlen(argv[0])) == 0) {
4291 				cmd = &tog_commands[i];
4292 				if (hflag)
4293 					tog_commands[i].cmd_usage();
4294 				break;
4295 			}
4296 		}
4297 		if (cmd == NULL) {
4298 			/* Did the user specify a repository? */
4299 			char *repo_path = realpath(argv[0], NULL);
4300 			if (repo_path) {
4301 				struct got_repository *repo;
4302 				error = got_repo_open(&repo, repo_path);
4303 				if (error == NULL)
4304 					got_repo_close(repo);
4305 			} else
4306 				error = got_error_from_errno2("realpath",
4307 				    argv[0]);
4308 			if (error) {
4309 				if (hflag) {
4310 					fprintf(stderr, "%s: '%s' is not a "
4311 					    "known command\n", getprogname(),
4312 					    argv[0]);
4313 					usage();
4314 				}
4315 				fprintf(stderr, "%s: '%s' is neither a known "
4316 				    "command nor a path to a repository\n",
4317 				    getprogname(), argv[0]);
4318 				free(repo_path);
4319 				return 1;
4320 			}
4321 			cmd = &tog_commands[0];
4322 			cmd_argv = make_argv(cmd->name, repo_path);
4323 			argc = 2;
4324 			free(repo_path);
4325 		}
4326 	}
4327 
4328 	error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
4329 	if (error)
4330 		goto done;
4331 done:
4332 	endwin();
4333 	free(cmd_argv);
4334 	if (error)
4335 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
4336 	return 0;
4337 }