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 		return NULL;
550 	}
551 
552 	nodelay(stdscr, FALSE);
553 	/* Allow threads to make progress while we are waiting for input. */
554 	errcode = pthread_mutex_unlock(&tog_mutex);
555 	if (errcode)
556 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
557 	ch = wgetch(view->window);
558 	errcode = pthread_mutex_lock(&tog_mutex);
559 	if (errcode)
560 		return got_error_set_errno(errcode, "pthread_mutex_lock");
561 	nodelay(stdscr, TRUE);
562 
563 	if (tog_sigwinch_received) {
564 		tog_resizeterm();
565 		tog_sigwinch_received = 0;
566 		TAILQ_FOREACH(v, views, entry) {
567 			err = view_resize(v);
568 			if (err)
569 				return err;
570 			err = v->input(new, dead, focus, v, KEY_RESIZE);
571 			if (err)
572 				return err;
573 		}
574 	}
575 
576 	switch (ch) {
577 	case ERR:
578 		break;
579 	case '\t':
580 		if (view->child) {
581 			*focus = view->child;
582 			view->child_focussed = 1;
583 		} else if (view->parent) {
584 			*focus = view->parent;
585 			view->parent->child_focussed = 0;
586 		}
587 		break;
588 	case 'q':
589 		err = view->input(new, dead, focus, view, ch);
590 		*dead = view;
591 		break;
592 	case 'Q':
593 		*done = 1;
594 		break;
595 	case 'f':
596 		if (view_is_parent_view(view)) {
597 			if (view->child == NULL)
598 				break;
599 			if (view_is_splitscreen(view->child)) {
600 				*focus = view->child;
601 				view->child_focussed = 1;
602 				err = view_fullscreen(view->child);
603 			} else
604 				err = view_splitscreen(view->child);
605 			if (err)
606 				break;
607 			err = view->child->input(new, dead, focus,
608 			    view->child, KEY_RESIZE);
609 		} else {
610 			if (view_is_splitscreen(view)) {
611 				*focus = view;
612 				view->parent->child_focussed = 1;
613 				err = view_fullscreen(view);
614 			} else {
615 				err = view_splitscreen(view);
616 			}
617 			if (err)
618 				break;
619 			err = view->input(new, dead, focus, view,
620 			    KEY_RESIZE);
621 		}
622 		break;
623 	case KEY_RESIZE:
624 		break;
625 	case '/':
626 		if (view->search_start)
627 			view->search_start(view);
628 		else
629 			err = view->input(new, dead, focus, view, ch);
630 		break;
631 	case 'N':
632 	case 'n':
633 		if (view->search_next && view->searching) {
634 			view->searching = (ch == 'n' ?
635 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
636 			view->search_next_done = 0;
637 			view->search_next(view);
638 		} else
639 			err = view->input(new, dead, focus, view, ch);
640 		break;
641 	default:
642 		err = view->input(new, dead, focus, view, ch);
643 		break;
644 	}
645 
646 	return err;
647 }
648 
649 void
650 view_vborder(struct tog_view *view)
651 {
652 	PANEL *panel;
653 	struct tog_view *view_above;
654 
655 	if (view->parent)
656 		return view_vborder(view->parent);
657 
658 	panel = panel_above(view->panel);
659 	if (panel == NULL)
660 		return;
661 
662 	view_above = panel_userptr(panel);
663 	mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
664 	    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
665 }
666 
667 int
668 view_needs_focus_indication(struct tog_view *view)
669 {
670 	if (view_is_parent_view(view)) {
671 		if (view->child == NULL || view->child_focussed)
672 			return 0;
673 		if (!view_is_splitscreen(view->child))
674 			return 0;
675 	} else if (!view_is_splitscreen(view))
676 		return 0;
677 
678 	return view->focussed;
679 }
680 
681 static const struct got_error *
682 view_loop(struct tog_view *view)
683 {
684 	const struct got_error *err = NULL;
685 	struct tog_view_list_head views;
686 	struct tog_view *new_view, *dead_view, *focus_view, *main_view;
687 	int fast_refresh = 10;
688 	int done = 0, errcode;
689 
690 	errcode = pthread_mutex_lock(&tog_mutex);
691 	if (errcode)
692 		return got_error_set_errno(errcode, "pthread_mutex_lock");
693 
694 	TAILQ_INIT(&views);
695 	TAILQ_INSERT_HEAD(&views, view, entry);
696 
697 	main_view = view;
698 	view->focussed = 1;
699 	err = view->show(view);
700 	if (err)
701 		return err;
702 	update_panels();
703 	doupdate();
704 	while (!TAILQ_EMPTY(&views) && !done) {
705 		/* Refresh fast during initialization, then become slower. */
706 		if (fast_refresh && fast_refresh-- == 0)
707 			halfdelay(10); /* switch to once per second */
708 
709 		err = view_input(&new_view, &dead_view, &focus_view, &done,
710 		    view, &views);
711 		if (err)
712 			break;
713 		if (dead_view) {
714 			struct tog_view *prev = NULL;
715 
716 			if (view_is_parent_view(dead_view))
717 				prev = TAILQ_PREV(dead_view,
718 				    tog_view_list_head, entry);
719 			else if (view->parent != dead_view)
720 				prev = view->parent;
721 
722 			if (dead_view->parent)
723 				dead_view->parent->child = NULL;
724 			else
725 				TAILQ_REMOVE(&views, dead_view, entry);
726 
727 			err = view_close(dead_view);
728 			if (err || dead_view == main_view)
729 				goto done;
730 
731 			if (view == dead_view) {
732 				if (focus_view)
733 					view = focus_view;
734 				else if (prev)
735 					view = prev;
736 				else if (!TAILQ_EMPTY(&views))
737 					view = TAILQ_LAST(&views,
738 					    tog_view_list_head);
739 				else
740 					view = NULL;
741 				if (view) {
742 					if (view->child && view->child_focussed)
743 						focus_view = view->child;
744 					else
745 						focus_view = view;
746 				}
747 			}
748 		}
749 		if (new_view) {
750 			struct tog_view *v, *t;
751 			/* Only allow one parent view per type. */
752 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
753 				if (v->type != new_view->type)
754 					continue;
755 				TAILQ_REMOVE(&views, v, entry);
756 				err = view_close(v);
757 				if (err)
758 					goto done;
759 				break;
760 			}
761 			TAILQ_INSERT_TAIL(&views, new_view, entry);
762 			view = new_view;
763 			if (focus_view == NULL)
764 				focus_view = new_view;
765 		}
766 		if (focus_view) {
767 			show_panel(focus_view->panel);
768 			if (view)
769 				view->focussed = 0;
770 			focus_view->focussed = 1;
771 			view = focus_view;
772 			if (new_view)
773 				show_panel(new_view->panel);
774 			if (view->child && view_is_splitscreen(view->child))
775 				show_panel(view->child->panel);
776 		}
777 		if (view) {
778 			if (focus_view == NULL) {
779 				view->focussed = 1;
780 				show_panel(view->panel);
781 				if (view->child && view_is_splitscreen(view->child))
782 					show_panel(view->child->panel);
783 				focus_view = view;
784 			}
785 			if (view->parent) {
786 				err = view->parent->show(view->parent);
787 				if (err)
788 					goto done;
789 			}
790 			err = view->show(view);
791 			if (err)
792 				goto done;
793 			if (view->child) {
794 				err = view->child->show(view->child);
795 				if (err)
796 					goto done;
797 			}
798 			update_panels();
799 			doupdate();
800 		}
801 	}
802 done:
803 	while (!TAILQ_EMPTY(&views)) {
804 		view = TAILQ_FIRST(&views);
805 		TAILQ_REMOVE(&views, view, entry);
806 		view_close(view);
807 	}
808 
809 	errcode = pthread_mutex_unlock(&tog_mutex);
810 	if (errcode)
811 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
812 
813 	return err;
814 }
815 
816 __dead static void
817 usage_log(void)
818 {
819 	endwin();
820 	fprintf(stderr,
821 	    "usage: %s log [-c commit] [-r repository-path] [path]\n",
822 	    getprogname());
823 	exit(1);
824 }
825 
826 /* Create newly allocated wide-character string equivalent to a byte string. */
827 static const struct got_error *
828 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
829 {
830 	char *vis = NULL;
831 	const struct got_error *err = NULL;
832 
833 	*ws = NULL;
834 	*wlen = mbstowcs(NULL, s, 0);
835 	if (*wlen == (size_t)-1) {
836 		int vislen;
837 		if (errno != EILSEQ)
838 			return got_error_from_errno("mbstowcs");
839 
840 		/* byte string invalid in current encoding; try to "fix" it */
841 		err = got_mbsavis(&vis, &vislen, s);
842 		if (err)
843 			return err;
844 		*wlen = mbstowcs(NULL, vis, 0);
845 		if (*wlen == (size_t)-1) {
846 			err = got_error_from_errno("mbstowcs"); /* give up */
847 			goto done;
848 		}
849 	}
850 
851 	*ws = calloc(*wlen + 1, sizeof(*ws));
852 	if (*ws == NULL) {
853 		err = got_error_from_errno("calloc");
854 		goto done;
855 	}
856 
857 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
858 		err = got_error_from_errno("mbstowcs");
859 done:
860 	free(vis);
861 	if (err) {
862 		free(*ws);
863 		*ws = NULL;
864 		*wlen = 0;
865 	}
866 	return err;
867 }
868 
869 /* Format a line for display, ensuring that it won't overflow a width limit. */
870 static const struct got_error *
871 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit)
872 {
873 	const struct got_error *err = NULL;
874 	int cols = 0;
875 	wchar_t *wline = NULL;
876 	size_t wlen;
877 	int i;
878 
879 	*wlinep = NULL;
880 	*widthp = 0;
881 
882 	err = mbs2ws(&wline, &wlen, line);
883 	if (err)
884 		return err;
885 
886 	i = 0;
887 	while (i < wlen && cols < wlimit) {
888 		int width = wcwidth(wline[i]);
889 		switch (width) {
890 		case 0:
891 			i++;
892 			break;
893 		case 1:
894 		case 2:
895 			if (cols + width <= wlimit)
896 				cols += width;
897 			i++;
898 			break;
899 		case -1:
900 			if (wline[i] == L'\t')
901 				cols += TABSIZE - ((cols + 1) % TABSIZE);
902 			i++;
903 			break;
904 		default:
905 			err = got_error_from_errno("wcwidth");
906 			goto done;
907 		}
908 	}
909 	wline[i] = L'\0';
910 	if (widthp)
911 		*widthp = cols;
912 done:
913 	if (err)
914 		free(wline);
915 	else
916 		*wlinep = wline;
917 	return err;
918 }
919 
920 static const struct got_error*
921 build_refs_str(char **refs_str, struct got_reflist_head *refs,
922     struct got_object_id *id)
923 {
924 	static const struct got_error *err = NULL;
925 	struct got_reflist_entry *re;
926 	char *s;
927 	const char *name;
928 
929 	*refs_str = NULL;
930 
931 	SIMPLEQ_FOREACH(re, refs, entry) {
932 		if (got_object_id_cmp(re->id, id) != 0)
933 			continue;
934 		name = got_ref_get_name(re->ref);
935 		if (strcmp(name, GOT_REF_HEAD) == 0)
936 			continue;
937 		if (strncmp(name, "refs/", 5) == 0)
938 			name += 5;
939 		if (strncmp(name, "got/", 4) == 0)
940 			continue;
941 		if (strncmp(name, "heads/", 6) == 0)
942 			name += 6;
943 		if (strncmp(name, "remotes/", 8) == 0)
944 			name += 8;
945 		s = *refs_str;
946 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
947 		    s ? ", " : "", name) == -1) {
948 			err = got_error_from_errno("asprintf");
949 			free(s);
950 			*refs_str = NULL;
951 			break;
952 		}
953 		free(s);
954 	}
955 
956 	return err;
957 }
958 
959 static const struct got_error *
960 format_author(wchar_t **wauthor, int *author_width, char *author, int limit)
961 {
962 	char *smallerthan, *at;
963 
964 	smallerthan = strchr(author, '<');
965 	if (smallerthan && smallerthan[1] != '\0')
966 		author = smallerthan + 1;
967 	at = strchr(author, '@');
968 	if (at)
969 		*at = '\0';
970 	return format_line(wauthor, author_width, author, limit);
971 }
972 
973 static const struct got_error *
974 draw_commit(struct tog_view *view, struct got_commit_object *commit,
975     struct got_object_id *id, struct got_reflist_head *refs,
976     int author_display_cols)
977 {
978 	const struct got_error *err = NULL;
979 	char datebuf[10]; /* YY-MM-DD + SPACE + NUL */
980 	char *logmsg0 = NULL, *logmsg = NULL;
981 	char *author = NULL;
982 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
983 	int author_width, logmsg_width;
984 	char *newline, *line = NULL;
985 	int col, limit;
986 	static const size_t date_display_cols = 9;
987 	const int avail = view->ncols;
988 	struct tm tm;
989 	time_t committer_time;
990 
991 	committer_time = got_object_commit_get_committer_time(commit);
992 	if (localtime_r(&committer_time, &tm) == NULL)
993 		return got_error_from_errno("localtime_r");
994 	if (strftime(datebuf, sizeof(datebuf), "%g/%m/%d ", &tm)
995 	    >= sizeof(datebuf))
996 		return got_error(GOT_ERR_NO_SPACE);
997 
998 	if (avail < date_display_cols)
999 		limit = MIN(sizeof(datebuf) - 1, avail);
1000 	else
1001 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1002 	waddnstr(view->window, datebuf, limit);
1003 	col = limit + 1;
1004 	if (col > avail)
1005 		goto done;
1006 
1007 	author = strdup(got_object_commit_get_author(commit));
1008 	if (author == NULL) {
1009 		err = got_error_from_errno("strdup");
1010 		goto done;
1011 	}
1012 	err = format_author(&wauthor, &author_width, author, avail - col);
1013 	if (err)
1014 		goto done;
1015 	waddwstr(view->window, wauthor);
1016 	col += author_width;
1017 	while (col <= avail && author_width < author_display_cols + 2) {
1018 		waddch(view->window, ' ');
1019 		col++;
1020 		author_width++;
1021 	}
1022 	if (col > avail)
1023 		goto done;
1024 
1025 	logmsg0 = strdup(got_object_commit_get_logmsg(commit));
1026 	if (logmsg0 == NULL) {
1027 		err = got_error_from_errno("strdup");
1028 		goto done;
1029 	}
1030 	logmsg = logmsg0;
1031 	while (*logmsg == '\n')
1032 		logmsg++;
1033 	newline = strchr(logmsg, '\n');
1034 	if (newline)
1035 		*newline = '\0';
1036 	limit = avail - col;
1037 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit);
1038 	if (err)
1039 		goto done;
1040 	waddwstr(view->window, wlogmsg);
1041 	col += logmsg_width;
1042 	while (col <= avail) {
1043 		waddch(view->window, ' ');
1044 		col++;
1045 	}
1046 done:
1047 	free(logmsg0);
1048 	free(wlogmsg);
1049 	free(author);
1050 	free(wauthor);
1051 	free(line);
1052 	return err;
1053 }
1054 
1055 static struct commit_queue_entry *
1056 alloc_commit_queue_entry(struct got_commit_object *commit,
1057     struct got_object_id *id)
1058 {
1059 	struct commit_queue_entry *entry;
1060 
1061 	entry = calloc(1, sizeof(*entry));
1062 	if (entry == NULL)
1063 		return NULL;
1064 
1065 	entry->id = id;
1066 	entry->commit = commit;
1067 	return entry;
1068 }
1069 
1070 static void
1071 pop_commit(struct commit_queue *commits)
1072 {
1073 	struct commit_queue_entry *entry;
1074 
1075 	entry = TAILQ_FIRST(&commits->head);
1076 	TAILQ_REMOVE(&commits->head, entry, entry);
1077 	got_object_commit_close(entry->commit);
1078 	commits->ncommits--;
1079 	/* Don't free entry->id! It is owned by the commit graph. */
1080 	free(entry);
1081 }
1082 
1083 static void
1084 free_commits(struct commit_queue *commits)
1085 {
1086 	while (!TAILQ_EMPTY(&commits->head))
1087 		pop_commit(commits);
1088 }
1089 
1090 static const struct got_error *
1091 queue_commits(struct got_commit_graph *graph, struct commit_queue *commits,
1092     int minqueue, struct got_repository *repo, const char *path)
1093 {
1094 	const struct got_error *err = NULL;
1095 	int nqueued = 0;
1096 
1097 	/*
1098 	 * We keep all commits open throughout the lifetime of the log
1099 	 * view in order to avoid having to re-fetch commits from disk
1100 	 * while updating the display.
1101 	 */
1102 	while (nqueued < minqueue) {
1103 		struct got_object_id *id;
1104 		struct got_commit_object *commit;
1105 		struct commit_queue_entry *entry;
1106 		int errcode;
1107 
1108 		err = got_commit_graph_iter_next(&id, graph);
1109 		if (err) {
1110 			if (err->code != GOT_ERR_ITER_NEED_MORE)
1111 				break;
1112 			err = got_commit_graph_fetch_commits(graph,
1113 			    minqueue, repo);
1114 			if (err)
1115 				return err;
1116 			continue;
1117 		}
1118 
1119 		if (id == NULL)
1120 			break;
1121 
1122 		err = got_object_open_as_commit(&commit, repo, id);
1123 		if (err)
1124 			break;
1125 		entry = alloc_commit_queue_entry(commit, id);
1126 		if (entry == NULL) {
1127 			err = got_error_from_errno("alloc_commit_queue_entry");
1128 			break;
1129 		}
1130 
1131 		errcode = pthread_mutex_lock(&tog_mutex);
1132 		if (errcode) {
1133 			err = got_error_set_errno(errcode, "pthread_mutex_lock");
1134 			break;
1135 		}
1136 
1137 		entry->idx = commits->ncommits;
1138 		TAILQ_INSERT_TAIL(&commits->head, entry, entry);
1139 		nqueued++;
1140 		commits->ncommits++;
1141 
1142 		errcode = pthread_mutex_unlock(&tog_mutex);
1143 		if (errcode && err == NULL)
1144 			err = got_error_set_errno(errcode,
1145 			    "pthread_mutex_unlock");
1146 	}
1147 
1148 	return err;
1149 }
1150 
1151 static const struct got_error *
1152 get_head_commit_id(struct got_object_id **head_id, const char *branch_name,
1153     struct got_repository *repo)
1154 {
1155 	const struct got_error *err = NULL;
1156 	struct got_reference *head_ref;
1157 
1158 	*head_id = NULL;
1159 
1160 	err = got_ref_open(&head_ref, repo, branch_name, 0);
1161 	if (err)
1162 		return err;
1163 
1164 	err = got_ref_resolve(head_id, repo, head_ref);
1165 	got_ref_close(head_ref);
1166 	if (err) {
1167 		*head_id = NULL;
1168 		return err;
1169 	}
1170 
1171 	return NULL;
1172 }
1173 
1174 static const struct got_error *
1175 draw_commits(struct tog_view *view, struct commit_queue_entry **last,
1176     struct commit_queue_entry **selected, struct commit_queue_entry *first,
1177     struct commit_queue *commits, int selected_idx, int limit,
1178     struct got_reflist_head *refs, const char *path, int commits_needed)
1179 {
1180 	const struct got_error *err = NULL;
1181 	struct commit_queue_entry *entry;
1182 	int width;
1183 	int ncommits, author_cols = 10;
1184 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
1185 	char *refs_str = NULL;
1186 	wchar_t *wline;
1187 
1188 	entry = first;
1189 	ncommits = 0;
1190 	while (entry) {
1191 		if (ncommits == selected_idx) {
1192 			*selected = entry;
1193 			break;
1194 		}
1195 		entry = TAILQ_NEXT(entry, entry);
1196 		ncommits++;
1197 	}
1198 
1199 	if (*selected && !(view->searching && view->search_next_done == 0)) {
1200 		err = got_object_id_str(&id_str, (*selected)->id);
1201 		if (err)
1202 			return err;
1203 		if (refs) {
1204 			err = build_refs_str(&refs_str, refs, (*selected)->id);
1205 			if (err)
1206 				goto done;
1207 		}
1208 	}
1209 
1210 	if (commits_needed == 0)
1211 		halfdelay(10); /* disable fast refresh */
1212 
1213 	if (asprintf(&ncommits_str, " [%d/%d] %s",
1214 	    entry ? entry->idx + 1 : 0, commits->ncommits,
1215 	    commits_needed > 0 ?
1216 	    (view->searching && view->search_next_done == 0
1217 	    ? "searching..." : "loading... ") :
1218 	    (refs_str ? refs_str : "")) == -1) {
1219 		err = got_error_from_errno("asprintf");
1220 		goto done;
1221 	}
1222 
1223 	if (path && strcmp(path, "/") != 0) {
1224 		if (asprintf(&header, "commit %s %s%s",
1225 		    id_str ? id_str : "........................................",
1226 		    path, ncommits_str) == -1) {
1227 			err = got_error_from_errno("asprintf");
1228 			header = NULL;
1229 			goto done;
1230 		}
1231 	} else if (asprintf(&header, "commit %s%s",
1232 	    id_str ? id_str : "........................................",
1233 	    ncommits_str) == -1) {
1234 		err = got_error_from_errno("asprintf");
1235 		header = NULL;
1236 		goto done;
1237 	}
1238 	err = format_line(&wline, &width, header, view->ncols);
1239 	if (err)
1240 		goto done;
1241 
1242 	werase(view->window);
1243 
1244 	if (view_needs_focus_indication(view))
1245 		wstandout(view->window);
1246 	waddwstr(view->window, wline);
1247 	while (width < view->ncols) {
1248 		waddch(view->window, ' ');
1249 		width++;
1250 	}
1251 	if (view_needs_focus_indication(view))
1252 		wstandend(view->window);
1253 	free(wline);
1254 	if (limit <= 1)
1255 		goto done;
1256 
1257 	/* Grow author column size if necessary. */
1258 	entry = first;
1259 	ncommits = 0;
1260 	while (entry) {
1261 		char *author;
1262 		wchar_t *wauthor;
1263 		int width;
1264 		if (ncommits >= limit - 1)
1265 			break;
1266 		author = strdup(got_object_commit_get_author(entry->commit));
1267 		if (author == NULL) {
1268 			err = got_error_from_errno("strdup");
1269 			goto done;
1270 		}
1271 		err = format_author(&wauthor, &width, author, COLS);
1272 		if (author_cols < width)
1273 			author_cols = width;
1274 		free(wauthor);
1275 		free(author);
1276 		entry = TAILQ_NEXT(entry, entry);
1277 	}
1278 
1279 	entry = first;
1280 	*last = first;
1281 	ncommits = 0;
1282 	while (entry) {
1283 		if (ncommits >= limit - 1)
1284 			break;
1285 		if (ncommits == selected_idx)
1286 			wstandout(view->window);
1287 		err = draw_commit(view, entry->commit, entry->id, refs,
1288 		    author_cols);
1289 		if (ncommits == selected_idx)
1290 			wstandend(view->window);
1291 		if (err)
1292 			goto done;
1293 		ncommits++;
1294 		*last = entry;
1295 		entry = TAILQ_NEXT(entry, entry);
1296 	}
1297 
1298 	view_vborder(view);
1299 done:
1300 	free(id_str);
1301 	free(refs_str);
1302 	free(ncommits_str);
1303 	free(header);
1304 	return err;
1305 }
1306 
1307 static void
1308 scroll_up(struct tog_view *view,
1309     struct commit_queue_entry **first_displayed_entry, int maxscroll,
1310     struct commit_queue *commits)
1311 {
1312 	struct commit_queue_entry *entry;
1313 	int nscrolled = 0;
1314 
1315 	entry = TAILQ_FIRST(&commits->head);
1316 	if (*first_displayed_entry == entry)
1317 		return;
1318 
1319 	entry = *first_displayed_entry;
1320 	while (entry && nscrolled < maxscroll) {
1321 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
1322 		if (entry) {
1323 			*first_displayed_entry = entry;
1324 			nscrolled++;
1325 		}
1326 	}
1327 }
1328 
1329 static const struct got_error *
1330 trigger_log_thread(int load_all, int *commits_needed, int *log_complete,
1331     pthread_cond_t *need_commits)
1332 {
1333 	int errcode;
1334 	int max_wait = 20;
1335 
1336 	halfdelay(1); /* fast refresh while loading commits */
1337 
1338 	while (*commits_needed > 0) {
1339 		if (*log_complete)
1340 			break;
1341 
1342 		/* Wake the log thread. */
1343 		errcode = pthread_cond_signal(need_commits);
1344 		if (errcode)
1345 			return got_error_set_errno(errcode,
1346 			    "pthread_cond_signal");
1347 		errcode = pthread_mutex_unlock(&tog_mutex);
1348 		if (errcode)
1349 			return got_error_set_errno(errcode,
1350 			    "pthread_mutex_unlock");
1351 		pthread_yield();
1352 		errcode = pthread_mutex_lock(&tog_mutex);
1353 		if (errcode)
1354 			return got_error_set_errno(errcode,
1355 			    "pthread_mutex_lock");
1356 
1357 		if (*commits_needed > 0 && (!load_all || --max_wait <= 0)) {
1358 			/*
1359 			 * Thread is not done yet; lose a key press
1360 			 * and let the user retry... this way the GUI
1361 			 * remains interactive while logging deep paths
1362 			 * with few commits in history.
1363 			 */
1364 			return NULL;
1365 		}
1366 	}
1367 
1368 	return NULL;
1369 }
1370 
1371 static const struct got_error *
1372 scroll_down(struct tog_view *view,
1373     struct commit_queue_entry **first_displayed_entry, int maxscroll,
1374     struct commit_queue_entry **last_displayed_entry,
1375     struct commit_queue *commits, int *log_complete, int *commits_needed,
1376     pthread_cond_t *need_commits)
1377 {
1378 	const struct got_error *err = NULL;
1379 	struct commit_queue_entry *pentry;
1380 	int nscrolled = 0;
1381 
1382 	if (*last_displayed_entry == NULL)
1383 		return NULL;
1384 
1385 	pentry = TAILQ_NEXT(*last_displayed_entry, entry);
1386 	if (pentry == NULL && !*log_complete) {
1387 		/*
1388 		 * Ask the log thread for required amount of commits
1389 		 * plus some amount of pre-fetching.
1390 		 */
1391 		(*commits_needed) += maxscroll + 20;
1392 		err = trigger_log_thread(0, commits_needed, log_complete,
1393 		    need_commits);
1394 		if (err)
1395 			return err;
1396 	}
1397 
1398 	do {
1399 		pentry = TAILQ_NEXT(*last_displayed_entry, entry);
1400 		if (pentry == NULL)
1401 			break;
1402 
1403 		*last_displayed_entry = pentry;
1404 
1405 		pentry = TAILQ_NEXT(*first_displayed_entry, entry);
1406 		if (pentry == NULL)
1407 			break;
1408 		*first_displayed_entry = pentry;
1409 	} while (++nscrolled < maxscroll);
1410 
1411 	return err;
1412 }
1413 
1414 static const struct got_error *
1415 open_diff_view_for_commit(struct tog_view **new_view, int begin_x,
1416     struct got_commit_object *commit, struct got_object_id *commit_id,
1417     struct tog_view *log_view, struct got_reflist_head *refs,
1418     struct got_repository *repo)
1419 {
1420 	const struct got_error *err;
1421 	struct got_object_qid *parent_id;
1422 	struct tog_view *diff_view;
1423 
1424 	diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
1425 	if (diff_view == NULL)
1426 		return got_error_from_errno("view_open");
1427 
1428 	parent_id = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
1429 	err = open_diff_view(diff_view, parent_id ? parent_id->id : NULL,
1430 	    commit_id, log_view, refs, repo);
1431 	if (err == NULL)
1432 		*new_view = diff_view;
1433 	return err;
1434 }
1435 
1436 static const struct got_error *
1437 tree_view_visit_subtree(struct got_tree_object *subtree,
1438     struct tog_tree_view_state *s)
1439 {
1440 	struct tog_parent_tree *parent;
1441 
1442 	parent = calloc(1, sizeof(*parent));
1443 	if (parent == NULL)
1444 		return got_error_from_errno("calloc");
1445 
1446 	parent->tree = s->tree;
1447 	parent->first_displayed_entry = s->first_displayed_entry;
1448 	parent->selected_entry = s->selected_entry;
1449 	parent->selected = s->selected;
1450 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
1451 	s->tree = subtree;
1452 	s->entries = got_object_tree_get_entries(s->tree);
1453 	s->selected = 0;
1454 	s->first_displayed_entry = NULL;
1455 	return NULL;
1456 }
1457 
1458 
1459 static const struct got_error *
1460 browse_commit_tree(struct tog_view **new_view, int begin_x,
1461     struct commit_queue_entry *entry, const char *path,
1462     struct got_reflist_head *refs, struct got_repository *repo)
1463 {
1464 	const struct got_error *err = NULL;
1465 	struct got_tree_object *tree;
1466 	struct got_tree_entry *te;
1467 	struct tog_tree_view_state *s;
1468 	struct tog_view *tree_view;
1469 	char *slash, *subpath = NULL;
1470 	const char *p;
1471 
1472 	err = got_object_open_as_tree(&tree, repo,
1473 	    got_object_commit_get_tree_id(entry->commit));
1474 	if (err)
1475 		return err;
1476 
1477 	tree_view = view_open(0, 0, 0, begin_x, TOG_VIEW_TREE);
1478 	if (tree_view == NULL)
1479 		return got_error_from_errno("view_open");
1480 
1481 	err = open_tree_view(tree_view, tree, entry->id, refs, repo);
1482 	if (err) {
1483 		got_object_tree_close(tree);
1484 		return err;
1485 	}
1486 	s = &tree_view->state.tree;
1487 
1488 	*new_view = tree_view;
1489 
1490 	/* Walk the path and open corresponding tree objects. */
1491 	p = path;
1492 	while (*p) {
1493 		struct got_object_id *tree_id;
1494 
1495 		while (p[0] == '/')
1496 			p++;
1497 
1498 		/* Ensure the correct subtree entry is selected. */
1499 		slash = strchr(p, '/');
1500 		if (slash == NULL)
1501 			slash = strchr(p, '\0');
1502 		SIMPLEQ_FOREACH(te, &s->entries->head, entry) {
1503 			if (strncmp(p, te->name, slash - p) == 0) {
1504 				s->selected_entry = te;
1505 				break;
1506 			}
1507 			s->selected++;
1508 		}
1509 		if (s->selected_entry == NULL) {
1510 			err = got_error(GOT_ERR_NO_TREE_ENTRY);
1511 			break;
1512 		}
1513 		if (s->tree != s->root)
1514 			s->selected++; /* skip '..' */
1515 
1516 		if (!S_ISDIR(s->selected_entry->mode)) {
1517 			/* Jump to this file's entry. */
1518 			s->first_displayed_entry = s->selected_entry;
1519 			s->selected = 0;
1520 			break;
1521 		}
1522 
1523 		slash = strchr(p, '/');
1524 		if (slash)
1525 			subpath = strndup(path, slash - path);
1526 		else
1527 			subpath = strdup(path);
1528 		if (subpath == NULL) {
1529 			err = got_error_from_errno("strdup");
1530 			break;
1531 		}
1532 
1533 		err = got_object_id_by_path(&tree_id, repo, entry->id,
1534 		    subpath);
1535 		if (err)
1536 			break;
1537 
1538 		err = got_object_open_as_tree(&tree, repo, tree_id);
1539 		free(tree_id);
1540 		if (err)
1541 			break;
1542 
1543 		err = tree_view_visit_subtree(tree, s);
1544 		if (err) {
1545 			got_object_tree_close(tree);
1546 			break;
1547 		}
1548 		if (slash == NULL)
1549 			break;
1550 		free(subpath);
1551 		subpath = NULL;
1552 		p = slash;
1553 	}
1554 
1555 	free(subpath);
1556 	return err;
1557 }
1558 
1559 static void *
1560 log_thread(void *arg)
1561 {
1562 	const struct got_error *err = NULL;
1563 	int errcode = 0;
1564 	struct tog_log_thread_args *a = arg;
1565 	int done = 0;
1566 
1567 	err = got_commit_graph_iter_start(a->graph, a->start_id, a->repo);
1568 	if (err)
1569 		return (void *)err;
1570 
1571 	while (!done && !err) {
1572 		err = queue_commits(a->graph, a->commits, 1, a->repo,
1573 		    a->in_repo_path);
1574 		if (err) {
1575 			if (err->code != GOT_ERR_ITER_COMPLETED)
1576 				return (void *)err;
1577 			err = NULL;
1578 			done = 1;
1579 		} else if (a->commits_needed > 0)
1580 			a->commits_needed--;
1581 
1582 		errcode = pthread_mutex_lock(&tog_mutex);
1583 		if (errcode) {
1584 			err = got_error_set_errno(errcode,
1585 			    "pthread_mutex_lock");
1586 			break;
1587 		} else if (*a->quit)
1588 			done = 1;
1589 		else if (*a->first_displayed_entry == NULL) {
1590 			*a->first_displayed_entry =
1591 			    TAILQ_FIRST(&a->commits->head);
1592 			*a->selected_entry = *a->first_displayed_entry;
1593 		}
1594 
1595 		if (done)
1596 			a->commits_needed = 0;
1597 		else if (a->commits_needed == 0) {
1598 			errcode = pthread_cond_wait(&a->need_commits,
1599 			    &tog_mutex);
1600 			if (errcode)
1601 				err = got_error_set_errno(errcode,
1602 				    "pthread_cond_wait");
1603 		}
1604 
1605 		errcode = pthread_mutex_unlock(&tog_mutex);
1606 		if (errcode && err == NULL)
1607 			err = got_error_set_errno(errcode,
1608 			    "pthread_mutex_unlock");
1609 	}
1610 	a->log_complete = 1;
1611 	return (void *)err;
1612 }
1613 
1614 static const struct got_error *
1615 stop_log_thread(struct tog_log_view_state *s)
1616 {
1617 	const struct got_error *err = NULL;
1618 	int errcode;
1619 
1620 	if (s->thread) {
1621 		s->quit = 1;
1622 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
1623 		if (errcode)
1624 			return got_error_set_errno(errcode,
1625 			    "pthread_cond_signal");
1626 		errcode = pthread_mutex_unlock(&tog_mutex);
1627 		if (errcode)
1628 			return got_error_set_errno(errcode,
1629 			    "pthread_mutex_unlock");
1630 		errcode = pthread_join(s->thread, (void **)&err);
1631 		if (errcode)
1632 			return got_error_set_errno(errcode, "pthread_join");
1633 		errcode = pthread_mutex_lock(&tog_mutex);
1634 		if (errcode)
1635 			return got_error_set_errno(errcode,
1636 			    "pthread_mutex_lock");
1637 		s->thread = NULL;
1638 	}
1639 
1640 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
1641 	if (errcode && err == NULL)
1642 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
1643 
1644 	if (s->thread_args.repo) {
1645 		got_repo_close(s->thread_args.repo);
1646 		s->thread_args.repo = NULL;
1647 	}
1648 
1649 	if (s->thread_args.graph) {
1650 		got_commit_graph_close(s->thread_args.graph);
1651 		s->thread_args.graph = NULL;
1652 	}
1653 
1654 	return err;
1655 }
1656 
1657 static const struct got_error *
1658 close_log_view(struct tog_view *view)
1659 {
1660 	const struct got_error *err = NULL;
1661 	struct tog_log_view_state *s = &view->state.log;
1662 
1663 	err = stop_log_thread(s);
1664 	free_commits(&s->commits);
1665 	free(s->in_repo_path);
1666 	s->in_repo_path = NULL;
1667 	free(s->start_id);
1668 	s->start_id = NULL;
1669 	return err;
1670 }
1671 
1672 static const struct got_error *
1673 search_start_log_view(struct tog_view *view)
1674 {
1675 	struct tog_log_view_state *s = &view->state.log;
1676 	char pattern[1024];
1677 	int ret;
1678 
1679 	if (view->nlines < 1)
1680 		return NULL;
1681 
1682 	mvwaddstr(view->window, view->begin_y + view->nlines - 1,
1683 	    view->begin_x, "/");
1684 	wclrtoeol(view->window);
1685 
1686 	nocbreak();
1687 	echo();
1688 	ret = wgetnstr(view->window, pattern, sizeof(pattern));
1689 	cbreak();
1690 	noecho();
1691 	if (ret == ERR)
1692 		return NULL;
1693 
1694 	if (view->searching) {
1695 		regfree(&s->regex);
1696 		view->searching = 0;
1697 	}
1698 
1699 	s->matched_entry = NULL;
1700 	if (regcomp(&s->regex, pattern,
1701 	    REG_EXTENDED | REG_ICASE | REG_NOSUB | REG_NEWLINE) == 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->selected_entry, entry);
1741 		else
1742 			entry = TAILQ_PREV(s->selected_entry,
1743 			    commit_queue_head, entry);
1744 	} else {
1745 		if (view->searching == TOG_SEARCH_FORWARD)
1746 			entry = TAILQ_FIRST(&s->commits.head);
1747 		else
1748 			entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
1749 	}
1750 
1751 	while (1) {
1752 		if (entry == NULL) {
1753 			if (s->thread_args.log_complete) {
1754 				if (s->matched_entry == NULL) {
1755 					view->search_next_done = 1;
1756 					return NULL;
1757 				}
1758 				if (view->searching == TOG_SEARCH_FORWARD)
1759 					entry = TAILQ_FIRST(&s->commits.head);
1760 				else
1761 					entry = TAILQ_LAST(&s->commits.head,
1762 					    commit_queue_head);
1763 			} else {
1764 				s->thread_args.commits_needed = 1;
1765 				return trigger_log_thread(0,
1766 				    &s->thread_args.commits_needed,
1767 				    &s->thread_args.log_complete,
1768 				    &s->thread_args.need_commits);
1769 			}
1770 		}
1771 
1772 		if (match_commit(entry->commit, &s->regex)) {
1773 			view->search_next_done = 1;
1774 			break;
1775 		}
1776 		if (view->searching == TOG_SEARCH_FORWARD)
1777 			entry = TAILQ_NEXT(entry, entry);
1778 		else
1779 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
1780 	}
1781 
1782 	if (entry) {
1783 		int cur = s->selected_entry->idx;
1784 		s->matched_entry = entry;
1785 		while (cur < s->matched_entry->idx) {
1786 			err = input_log_view(NULL, NULL, NULL, view, KEY_DOWN);
1787 			if (err)
1788 				return err;
1789 			cur++;
1790 		}
1791 		while (cur > s->matched_entry->idx) {
1792 			err = input_log_view(NULL, NULL, NULL, view, KEY_UP);
1793 			if (err)
1794 				return err;
1795 			cur--;
1796 		}
1797 	}
1798 
1799 	return NULL;
1800 }
1801 
1802 
1803 static const struct got_error *
1804 open_log_view(struct tog_view *view, struct got_object_id *start_id,
1805     struct got_reflist_head *refs, struct got_repository *repo,
1806     const char *path, int check_disk)
1807 {
1808 	const struct got_error *err = NULL;
1809 	struct tog_log_view_state *s = &view->state.log;
1810 	struct got_repository *thread_repo = NULL;
1811 	struct got_commit_graph *thread_graph = NULL;
1812 	int errcode;
1813 
1814 	err = got_repo_map_path(&s->in_repo_path, repo, path, check_disk);
1815 	if (err != NULL)
1816 		goto done;
1817 
1818 	/* The commit queue only contains commits being displayed. */
1819 	TAILQ_INIT(&s->commits.head);
1820 	s->commits.ncommits = 0;
1821 
1822 	s->refs = refs;
1823 	s->repo = repo;
1824 	s->start_id = got_object_id_dup(start_id);
1825 	if (s->start_id == NULL) {
1826 		err = got_error_from_errno("got_object_id_dup");
1827 		goto done;
1828 	}
1829 
1830 	view->show = show_log_view;
1831 	view->input = input_log_view;
1832 	view->close = close_log_view;
1833 	view->search_start = search_start_log_view;
1834 	view->search_next = search_next_log_view;
1835 
1836 	err = got_repo_open(&thread_repo, got_repo_get_path(repo));
1837 	if (err)
1838 		goto done;
1839 	err = got_commit_graph_open(&thread_graph, start_id, s->in_repo_path,
1840 	    0, thread_repo);
1841 	if (err)
1842 		goto done;
1843 
1844 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
1845 	if (errcode) {
1846 		err = got_error_set_errno(errcode, "pthread_cond_init");
1847 		goto done;
1848 	}
1849 
1850 	s->thread_args.commits_needed = view->nlines;
1851 	s->thread_args.graph = thread_graph;
1852 	s->thread_args.commits = &s->commits;
1853 	s->thread_args.in_repo_path = s->in_repo_path;
1854 	s->thread_args.start_id = s->start_id;
1855 	s->thread_args.repo = thread_repo;
1856 	s->thread_args.log_complete = 0;
1857 	s->thread_args.quit = &s->quit;
1858 	s->thread_args.view = view;
1859 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
1860 	s->thread_args.selected_entry = &s->selected_entry;
1861 done:
1862 	if (err)
1863 		close_log_view(view);
1864 	return err;
1865 }
1866 
1867 static const struct got_error *
1868 show_log_view(struct tog_view *view)
1869 {
1870 	struct tog_log_view_state *s = &view->state.log;
1871 
1872 	if (s->thread == NULL) {
1873 		int errcode = pthread_create(&s->thread, NULL, log_thread,
1874 		    &s->thread_args);
1875 		if (errcode)
1876 			return got_error_set_errno(errcode, "pthread_create");
1877 	}
1878 
1879 	return draw_commits(view, &s->last_displayed_entry,
1880 	    &s->selected_entry, s->first_displayed_entry,
1881 	    &s->commits, s->selected, view->nlines, s->refs,
1882 	    s->in_repo_path, s->thread_args.commits_needed);
1883 }
1884 
1885 static const struct got_error *
1886 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
1887     struct tog_view **focus_view, struct tog_view *view, int ch)
1888 {
1889 	const struct got_error *err = NULL;
1890 	struct tog_log_view_state *s = &view->state.log;
1891 	char *parent_path;
1892 	struct tog_view *diff_view = NULL, *tree_view = NULL;
1893 	int begin_x = 0;
1894 
1895 	switch (ch) {
1896 	case 'q':
1897 		s->quit = 1;
1898 		break;
1899 	case 'k':
1900 	case KEY_UP:
1901 	case '<':
1902 	case ',':
1903 		if (s->first_displayed_entry == NULL)
1904 			break;
1905 		if (s->selected > 0)
1906 			s->selected--;
1907 		else
1908 			scroll_up(view, &s->first_displayed_entry, 1,
1909 			    &s->commits);
1910 		break;
1911 	case KEY_PPAGE:
1912 	case CTRL('b'):
1913 		if (s->first_displayed_entry == NULL)
1914 			break;
1915 		if (TAILQ_FIRST(&s->commits.head) ==
1916 		    s->first_displayed_entry) {
1917 			s->selected = 0;
1918 			break;
1919 		}
1920 		scroll_up(view, &s->first_displayed_entry,
1921 		    view->nlines, &s->commits);
1922 		break;
1923 	case 'j':
1924 	case KEY_DOWN:
1925 	case '>':
1926 	case '.':
1927 		if (s->first_displayed_entry == NULL)
1928 			break;
1929 		if (s->selected < MIN(view->nlines - 2,
1930 		    s->commits.ncommits - 1)) {
1931 			s->selected++;
1932 			break;
1933 		}
1934 		err = scroll_down(view, &s->first_displayed_entry, 1,
1935 		    &s->last_displayed_entry, &s->commits,
1936 		    &s->thread_args.log_complete,
1937 		    &s->thread_args.commits_needed,
1938 		    &s->thread_args.need_commits);
1939 		break;
1940 	case KEY_NPAGE:
1941 	case CTRL('f'): {
1942 		struct commit_queue_entry *first;
1943 		first = s->first_displayed_entry;
1944 		if (first == NULL)
1945 			break;
1946 		err = scroll_down(view, &s->first_displayed_entry,
1947 		    view->nlines, &s->last_displayed_entry,
1948 		    &s->commits, &s->thread_args.log_complete,
1949 		    &s->thread_args.commits_needed,
1950 		    &s->thread_args.need_commits);
1951 		if (first == s->first_displayed_entry &&
1952 		    s->selected < MIN(view->nlines - 2,
1953 		    s->commits.ncommits - 1)) {
1954 			/* can't scroll further down */
1955 			s->selected = MIN(view->nlines - 2,
1956 			    s->commits.ncommits - 1);
1957 		}
1958 		err = NULL;
1959 		break;
1960 	}
1961 	case KEY_RESIZE:
1962 		if (s->selected > view->nlines - 2)
1963 			s->selected = view->nlines - 2;
1964 		if (s->selected > s->commits.ncommits - 1)
1965 			s->selected = s->commits.ncommits - 1;
1966 		break;
1967 	case KEY_ENTER:
1968 	case ' ':
1969 	case '\r':
1970 		if (s->selected_entry == NULL)
1971 			break;
1972 		if (view_is_parent_view(view))
1973 			begin_x = view_split_begin_x(view->begin_x);
1974 		err = open_diff_view_for_commit(&diff_view, begin_x,
1975 		    s->selected_entry->commit, s->selected_entry->id,
1976 		    view, s->refs, s->repo);
1977 		if (err)
1978 			break;
1979 		if (view_is_parent_view(view)) {
1980 			err = view_close_child(view);
1981 			if (err)
1982 				return err;
1983 			err = view_set_child(view, diff_view);
1984 			if (err) {
1985 				view_close(diff_view);
1986 				break;
1987 			}
1988 			*focus_view = diff_view;
1989 			view->child_focussed = 1;
1990 		} else
1991 			*new_view = diff_view;
1992 		break;
1993 	case 't':
1994 		if (s->selected_entry == NULL)
1995 			break;
1996 		if (view_is_parent_view(view))
1997 			begin_x = view_split_begin_x(view->begin_x);
1998 		err = browse_commit_tree(&tree_view, begin_x,
1999 		    s->selected_entry, s->in_repo_path, s->refs, s->repo);
2000 		if (err)
2001 			break;
2002 		if (view_is_parent_view(view)) {
2003 			err = view_close_child(view);
2004 			if (err)
2005 				return err;
2006 			err = view_set_child(view, tree_view);
2007 			if (err) {
2008 				view_close(tree_view);
2009 				break;
2010 			}
2011 			*focus_view = tree_view;
2012 			view->child_focussed = 1;
2013 		} else
2014 			*new_view = tree_view;
2015 		break;
2016 	case KEY_BACKSPACE:
2017 		if (strcmp(s->in_repo_path, "/") == 0)
2018 			break;
2019 		parent_path = dirname(s->in_repo_path);
2020 		if (parent_path && strcmp(parent_path, ".") != 0) {
2021 			struct tog_view *lv;
2022 			err = stop_log_thread(s);
2023 			if (err)
2024 				return err;
2025 			lv = view_open(view->nlines, view->ncols,
2026 			    view->begin_y, view->begin_x, TOG_VIEW_LOG);
2027 			if (lv == NULL)
2028 				return got_error_from_errno(
2029 				    "view_open");
2030 			err = open_log_view(lv, s->start_id, s->refs,
2031 			    s->repo, parent_path, 0);
2032 			if (err)
2033 				return err;;
2034 			if (view_is_parent_view(view))
2035 				*new_view = lv;
2036 			else {
2037 				view_set_child(view->parent, lv);
2038 				*focus_view = lv;
2039 			}
2040 			return NULL;
2041 		}
2042 		break;
2043 	default:
2044 		break;
2045 	}
2046 
2047 	return err;
2048 }
2049 
2050 static const struct got_error *
2051 apply_unveil(const char *repo_path, const char *worktree_path)
2052 {
2053 	const struct got_error *error;
2054 
2055 	if (repo_path && unveil(repo_path, "r") != 0)
2056 		return got_error_from_errno2("unveil", repo_path);
2057 
2058 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
2059 		return got_error_from_errno2("unveil", worktree_path);
2060 
2061 	if (unveil("/tmp", "rwc") != 0)
2062 		return got_error_from_errno2("unveil", "/tmp");
2063 
2064 	error = got_privsep_unveil_exec_helpers();
2065 	if (error != NULL)
2066 		return error;
2067 
2068 	if (unveil(NULL, NULL) != 0)
2069 		return got_error_from_errno("unveil");
2070 
2071 	return NULL;
2072 }
2073 
2074 static void
2075 init_curses(void)
2076 {
2077 	initscr();
2078 	cbreak();
2079 	halfdelay(1); /* Do fast refresh while initial view is loading. */
2080 	noecho();
2081 	nonl();
2082 	intrflush(stdscr, FALSE);
2083 	keypad(stdscr, TRUE);
2084 	curs_set(0);
2085 	signal(SIGWINCH, tog_sigwinch);
2086 }
2087 
2088 static const struct got_error *
2089 cmd_log(int argc, char *argv[])
2090 {
2091 	const struct got_error *error;
2092 	struct got_repository *repo = NULL;
2093 	struct got_worktree *worktree = NULL;
2094 	struct got_reflist_head refs;
2095 	struct got_object_id *start_id = NULL;
2096 	char *path = NULL, *repo_path = NULL, *cwd = NULL;
2097 	char *start_commit = NULL;
2098 	int ch;
2099 	struct tog_view *view;
2100 
2101 	SIMPLEQ_INIT(&refs);
2102 
2103 #ifndef PROFILE
2104 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2105 	    NULL) == -1)
2106 		err(1, "pledge");
2107 #endif
2108 
2109 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
2110 		switch (ch) {
2111 		case 'c':
2112 			start_commit = optarg;
2113 			break;
2114 		case 'r':
2115 			repo_path = realpath(optarg, NULL);
2116 			if (repo_path == NULL)
2117 				err(1, "-r option");
2118 			break;
2119 		default:
2120 			usage_log();
2121 			/* NOTREACHED */
2122 		}
2123 	}
2124 
2125 	argc -= optind;
2126 	argv += optind;
2127 
2128 	cwd = getcwd(NULL, 0);
2129 	if (cwd == NULL) {
2130 		error = got_error_from_errno("getcwd");
2131 		goto done;
2132 	}
2133 	error = got_worktree_open(&worktree, cwd);
2134 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
2135 		goto done;
2136 	error = NULL;
2137 
2138 	if (argc == 0) {
2139 		path = strdup("");
2140 		if (path == NULL) {
2141 			error = got_error_from_errno("strdup");
2142 			goto done;
2143 		}
2144 	} else if (argc == 1) {
2145 		if (worktree) {
2146 			error = got_worktree_resolve_path(&path, worktree,
2147 			    argv[0]);
2148 			if (error)
2149 				goto done;
2150 		} else {
2151 			path = strdup(argv[0]);
2152 			if (path == NULL) {
2153 				error = got_error_from_errno("strdup");
2154 				goto done;
2155 			}
2156 		}
2157 	} else
2158 		usage_log();
2159 
2160 	repo_path = worktree ?
2161 	    strdup(got_worktree_get_repo_path(worktree)) : strdup(cwd);
2162 	if (repo_path == NULL) {
2163 		error = got_error_from_errno("strdup");
2164 		goto done;
2165 	}
2166 
2167 	init_curses();
2168 
2169 	error = got_repo_open(&repo, repo_path);
2170 	if (error != NULL)
2171 		goto done;
2172 
2173 	error = apply_unveil(got_repo_get_path(repo),
2174 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
2175 	if (error)
2176 		goto done;
2177 
2178 	if (start_commit == NULL)
2179 		error = get_head_commit_id(&start_id, worktree ?
2180 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
2181 		    repo);
2182 	else
2183 		error = got_object_resolve_id_str(&start_id, repo,
2184 		    start_commit);
2185 	if (error != NULL)
2186 		goto done;
2187 
2188 	error = got_ref_list(&refs, repo);
2189 	if (error)
2190 		goto done;
2191 
2192 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
2193 	if (view == NULL) {
2194 		error = got_error_from_errno("view_open");
2195 		goto done;
2196 	}
2197 	error = open_log_view(view, start_id, &refs, repo, path, 1);
2198 	if (error)
2199 		goto done;
2200 	error = view_loop(view);
2201 done:
2202 	free(repo_path);
2203 	free(cwd);
2204 	free(path);
2205 	free(start_id);
2206 	if (repo)
2207 		got_repo_close(repo);
2208 	if (worktree)
2209 		got_worktree_close(worktree);
2210 	got_ref_list_free(&refs);
2211 	return error;
2212 }
2213 
2214 __dead static void
2215 usage_diff(void)
2216 {
2217 	endwin();
2218 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
2219 	    getprogname());
2220 	exit(1);
2221 }
2222 
2223 static char *
2224 parse_next_line(FILE *f, size_t *len)
2225 {
2226 	char *line;
2227 	size_t linelen;
2228 	size_t lineno;
2229 	const char delim[3] = { '\0', '\0', '\0'};
2230 
2231 	line = fparseln(f, &linelen, &lineno, delim, 0);
2232 	if (len)
2233 		*len = linelen;
2234 	return line;
2235 }
2236 
2237 static const struct got_error *
2238 draw_file(struct tog_view *view, FILE *f, int *first_displayed_line,
2239     int *last_displayed_line, int *eof, int max_lines,
2240     char *header)
2241 {
2242 	const struct got_error *err;
2243 	int nlines = 0, nprinted = 0;
2244 	char *line;
2245 	size_t len;
2246 	wchar_t *wline;
2247 	int width;
2248 
2249 	rewind(f);
2250 	werase(view->window);
2251 
2252 	if (header) {
2253 		err = format_line(&wline, &width, header, view->ncols);
2254 		if (err) {
2255 			return err;
2256 		}
2257 
2258 		if (view_needs_focus_indication(view))
2259 			wstandout(view->window);
2260 		waddwstr(view->window, wline);
2261 		if (view_needs_focus_indication(view))
2262 			wstandend(view->window);
2263 		if (width < view->ncols - 1)
2264 			waddch(view->window, '\n');
2265 
2266 		if (max_lines <= 1)
2267 			return NULL;
2268 		max_lines--;
2269 	}
2270 
2271 	*eof = 0;
2272 	while (nprinted < max_lines) {
2273 		line = parse_next_line(f, &len);
2274 		if (line == NULL) {
2275 			*eof = 1;
2276 			break;
2277 		}
2278 		if (++nlines < *first_displayed_line) {
2279 			free(line);
2280 			continue;
2281 		}
2282 
2283 		err = format_line(&wline, &width, line, view->ncols);
2284 		if (err) {
2285 			free(line);
2286 			return err;
2287 		}
2288 		waddwstr(view->window, wline);
2289 		if (width < view->ncols - 1)
2290 			waddch(view->window, '\n');
2291 		if (++nprinted == 1)
2292 			*first_displayed_line = nlines;
2293 		free(line);
2294 		free(wline);
2295 		wline = NULL;
2296 	}
2297 	*last_displayed_line = nlines;
2298 
2299 	view_vborder(view);
2300 
2301 	if (*eof) {
2302 		while (nprinted < view->nlines) {
2303 			waddch(view->window, '\n');
2304 			nprinted++;
2305 		}
2306 
2307 		err = format_line(&wline, &width, TOG_EOF_STRING, view->ncols);
2308 		if (err) {
2309 			return err;
2310 		}
2311 
2312 		wstandout(view->window);
2313 		waddwstr(view->window, wline);
2314 		wstandend(view->window);
2315 	}
2316 
2317 	return NULL;
2318 }
2319 
2320 static char *
2321 get_datestr(time_t *time, char *datebuf)
2322 {
2323 	char *p, *s = ctime_r(time, datebuf);
2324 	p = strchr(s, '\n');
2325 	if (p)
2326 		*p = '\0';
2327 	return s;
2328 }
2329 
2330 static const struct got_error *
2331 write_commit_info(struct got_object_id *commit_id,
2332     struct got_reflist_head *refs, struct got_repository *repo, FILE *outfile)
2333 {
2334 	const struct got_error *err = NULL;
2335 	char datebuf[26];
2336 	struct got_commit_object *commit;
2337 	char *id_str = NULL;
2338 	time_t committer_time;
2339 	const char *author, *committer;
2340 	char *refs_str = NULL;
2341 
2342 	if (refs) {
2343 		err = build_refs_str(&refs_str, refs, commit_id);
2344 		if (err)
2345 			return err;
2346 	}
2347 
2348 	err = got_object_open_as_commit(&commit, repo, commit_id);
2349 	if (err)
2350 		return err;
2351 
2352 	err = got_object_id_str(&id_str, commit_id);
2353 	if (err) {
2354 		err = got_error_from_errno("got_object_id_str");
2355 		goto done;
2356 	}
2357 
2358 	if (fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
2359 	    refs_str ? refs_str : "", refs_str ? ")" : "") < 0) {
2360 		err = got_error_from_errno("fprintf");
2361 		goto done;
2362 	}
2363 	if (fprintf(outfile, "from: %s\n",
2364 	    got_object_commit_get_author(commit)) < 0) {
2365 		err = got_error_from_errno("fprintf");
2366 		goto done;
2367 	}
2368 	committer_time = got_object_commit_get_committer_time(commit);
2369 	if (fprintf(outfile, "date: %s UTC\n",
2370 	    get_datestr(&committer_time, datebuf)) < 0) {
2371 		err = got_error_from_errno("fprintf");
2372 		goto done;
2373 	}
2374 	author = got_object_commit_get_author(commit);
2375 	committer = got_object_commit_get_committer(commit);
2376 	if (strcmp(author, committer) != 0 &&
2377 	    fprintf(outfile, "via: %s\n", committer) < 0) {
2378 		err = got_error_from_errno("fprintf");
2379 		goto done;
2380 	}
2381 	if (fprintf(outfile, "%s\n",
2382 	    got_object_commit_get_logmsg(commit)) < 0) {
2383 		err = got_error_from_errno("fprintf");
2384 		goto done;
2385 	}
2386 done:
2387 	free(id_str);
2388 	free(refs_str);
2389 	got_object_commit_close(commit);
2390 	return err;
2391 }
2392 
2393 static const struct got_error *
2394 create_diff(struct tog_diff_view_state *s)
2395 {
2396 	const struct got_error *err = NULL;
2397 	FILE *f = NULL;
2398 	int obj_type;
2399 
2400 	f = got_opentemp();
2401 	if (f == NULL) {
2402 		err = got_error_from_errno("got_opentemp");
2403 		goto done;
2404 	}
2405 	if (s->f && fclose(s->f) != 0) {
2406 		err = got_error_from_errno("fclose");
2407 		goto done;
2408 	}
2409 	s->f = f;
2410 
2411 	if (s->id1)
2412 		err = got_object_get_type(&obj_type, s->repo, s->id1);
2413 	else
2414 		err = got_object_get_type(&obj_type, s->repo, s->id2);
2415 	if (err)
2416 		goto done;
2417 
2418 	switch (obj_type) {
2419 	case GOT_OBJ_TYPE_BLOB:
2420 		err = got_diff_objects_as_blobs(s->id1, s->id2, NULL, NULL,
2421 		    s->diff_context, s->repo, f);
2422 		break;
2423 	case GOT_OBJ_TYPE_TREE:
2424 		err = got_diff_objects_as_trees(s->id1, s->id2, "", "",
2425 		    s->diff_context, s->repo, f);
2426 		break;
2427 	case GOT_OBJ_TYPE_COMMIT: {
2428 		const struct got_object_id_queue *parent_ids;
2429 		struct got_object_qid *pid;
2430 		struct got_commit_object *commit2;
2431 
2432 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
2433 		if (err)
2434 			break;
2435 		/* Show commit info if we're diffing to a parent/root commit. */
2436 		if (s->id1 == NULL)
2437 			write_commit_info(s->id2, s->refs, s->repo, f);
2438 		else {
2439 			parent_ids = got_object_commit_get_parent_ids(commit2);
2440 			SIMPLEQ_FOREACH(pid, parent_ids, entry) {
2441 				if (got_object_id_cmp(s->id1, pid->id) == 0) {
2442 					write_commit_info(s->id2, s->refs,
2443 					    s->repo, f);
2444 					break;
2445 				}
2446 			}
2447 		}
2448 		got_object_commit_close(commit2);
2449 
2450 		err = got_diff_objects_as_commits(s->id1, s->id2,
2451 		    s->diff_context, s->repo, f);
2452 		break;
2453 	}
2454 	default:
2455 		err = got_error(GOT_ERR_OBJ_TYPE);
2456 		break;
2457 	}
2458 done:
2459 	if (f && fflush(f) != 0 && err == NULL)
2460 		err = got_error_from_errno("fflush");
2461 	return err;
2462 }
2463 
2464 static void
2465 diff_view_indicate_progress(struct tog_view *view)
2466 {
2467 	mvwaddstr(view->window, 0, 0, "diffing...");
2468 	update_panels();
2469 	doupdate();
2470 }
2471 
2472 static const struct got_error *
2473 open_diff_view(struct tog_view *view, struct got_object_id *id1,
2474     struct got_object_id *id2, struct tog_view *log_view,
2475     struct got_reflist_head *refs, struct got_repository *repo)
2476 {
2477 	const struct got_error *err;
2478 
2479 	if (id1 != NULL && id2 != NULL) {
2480 	    int type1, type2;
2481 	    err = got_object_get_type(&type1, repo, id1);
2482 	    if (err)
2483 		return err;
2484 	    err = got_object_get_type(&type2, repo, id2);
2485 	    if (err)
2486 		return err;
2487 
2488 	    if (type1 != type2)
2489 		return got_error(GOT_ERR_OBJ_TYPE);
2490 	}
2491 
2492 	if (id1) {
2493 		view->state.diff.id1 = got_object_id_dup(id1);
2494 		if (view->state.diff.id1 == NULL)
2495 			return got_error_from_errno("got_object_id_dup");
2496 	} else
2497 		view->state.diff.id1 = NULL;
2498 
2499 	view->state.diff.id2 = got_object_id_dup(id2);
2500 	if (view->state.diff.id2 == NULL) {
2501 		free(view->state.diff.id1);
2502 		view->state.diff.id1 = NULL;
2503 		return got_error_from_errno("got_object_id_dup");
2504 	}
2505 	view->state.diff.f = NULL;
2506 	view->state.diff.first_displayed_line = 1;
2507 	view->state.diff.last_displayed_line = view->nlines;
2508 	view->state.diff.diff_context = 3;
2509 	view->state.diff.log_view = log_view;
2510 	view->state.diff.repo = repo;
2511 	view->state.diff.refs = refs;
2512 
2513 	if (log_view && view_is_splitscreen(view))
2514 		show_log_view(log_view); /* draw vborder */
2515 	diff_view_indicate_progress(view);
2516 
2517 	err = create_diff(&view->state.diff);
2518 	if (err) {
2519 		free(view->state.diff.id1);
2520 		view->state.diff.id1 = NULL;
2521 		free(view->state.diff.id2);
2522 		view->state.diff.id2 = NULL;
2523 		return err;
2524 	}
2525 
2526 	view->show = show_diff_view;
2527 	view->input = input_diff_view;
2528 	view->close = close_diff_view;
2529 
2530 	return NULL;
2531 }
2532 
2533 static const struct got_error *
2534 close_diff_view(struct tog_view *view)
2535 {
2536 	const struct got_error *err = NULL;
2537 
2538 	free(view->state.diff.id1);
2539 	view->state.diff.id1 = NULL;
2540 	free(view->state.diff.id2);
2541 	view->state.diff.id2 = NULL;
2542 	if (view->state.diff.f && fclose(view->state.diff.f) == EOF)
2543 		err = got_error_from_errno("fclose");
2544 	return err;
2545 }
2546 
2547 static const struct got_error *
2548 show_diff_view(struct tog_view *view)
2549 {
2550 	const struct got_error *err;
2551 	struct tog_diff_view_state *s = &view->state.diff;
2552 	char *id_str1 = NULL, *id_str2, *header;
2553 
2554 	if (s->id1) {
2555 		err = got_object_id_str(&id_str1, s->id1);
2556 		if (err)
2557 			return err;
2558 	}
2559 	err = got_object_id_str(&id_str2, s->id2);
2560 	if (err)
2561 		return err;
2562 
2563 	if (asprintf(&header, "diff %s %s",
2564 	    id_str1 ? id_str1 : "/dev/null", id_str2) == -1) {
2565 		err = got_error_from_errno("asprintf");
2566 		free(id_str1);
2567 		free(id_str2);
2568 		return err;
2569 	}
2570 	free(id_str1);
2571 	free(id_str2);
2572 
2573 	return draw_file(view, s->f, &s->first_displayed_line,
2574 	    &s->last_displayed_line, &s->eof, view->nlines,
2575 	    header);
2576 }
2577 
2578 static const struct got_error *
2579 set_selected_commit(struct tog_diff_view_state *s,
2580     struct commit_queue_entry *entry)
2581 {
2582 	const struct got_error *err;
2583 	const struct got_object_id_queue *parent_ids;
2584 	struct got_commit_object *selected_commit;
2585 	struct got_object_qid *pid;
2586 
2587 	free(s->id2);
2588 	s->id2 = got_object_id_dup(entry->id);
2589 	if (s->id2 == NULL)
2590 		return got_error_from_errno("got_object_id_dup");
2591 
2592 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
2593 	if (err)
2594 		return err;
2595 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
2596 	free(s->id1);
2597 	pid = SIMPLEQ_FIRST(parent_ids);
2598 	s->id1 = pid ? got_object_id_dup(pid->id) : NULL;
2599 	got_object_commit_close(selected_commit);
2600 	return NULL;
2601 }
2602 
2603 static const struct got_error *
2604 input_diff_view(struct tog_view **new_view, struct tog_view **dead_view,
2605     struct tog_view **focus_view, struct tog_view *view, int ch)
2606 {
2607 	const struct got_error *err = NULL;
2608 	struct tog_diff_view_state *s = &view->state.diff;
2609 	struct tog_log_view_state *ls;
2610 	struct commit_queue_entry *entry;
2611 	int i;
2612 
2613 	switch (ch) {
2614 	case 'k':
2615 	case KEY_UP:
2616 		if (s->first_displayed_line > 1)
2617 			s->first_displayed_line--;
2618 		break;
2619 	case KEY_PPAGE:
2620 	case CTRL('b'):
2621 		if (s->first_displayed_line == 1)
2622 			break;
2623 		i = 0;
2624 		while (i++ < view->nlines - 1 &&
2625 		    s->first_displayed_line > 1)
2626 			s->first_displayed_line--;
2627 		break;
2628 	case 'j':
2629 	case KEY_DOWN:
2630 		if (!s->eof)
2631 			s->first_displayed_line++;
2632 		break;
2633 	case KEY_NPAGE:
2634 	case CTRL('f'):
2635 	case ' ':
2636 		if (s->eof)
2637 			break;
2638 		i = 0;
2639 		while (!s->eof && i++ < view->nlines - 1) {
2640 			char *line;
2641 			line = parse_next_line(s->f, NULL);
2642 			s->first_displayed_line++;
2643 			if (line == NULL)
2644 				break;
2645 		}
2646 		break;
2647 	case '[':
2648 		if (s->diff_context > 0) {
2649 			s->diff_context--;
2650 			diff_view_indicate_progress(view);
2651 			err = create_diff(s);
2652 		}
2653 		break;
2654 	case ']':
2655 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
2656 			s->diff_context++;
2657 			diff_view_indicate_progress(view);
2658 			err = create_diff(s);
2659 		}
2660 		break;
2661 	case '<':
2662 	case ',':
2663 		if (s->log_view == NULL)
2664 			break;
2665 		ls = &s->log_view->state.log;
2666 		entry = TAILQ_PREV(ls->selected_entry,
2667 		    commit_queue_head, entry);
2668 		if (entry == NULL)
2669 			break;
2670 
2671 		err = input_log_view(NULL, NULL, NULL, s->log_view,
2672 		    KEY_UP);
2673 		if (err)
2674 			break;
2675 
2676 		err = set_selected_commit(s, entry);
2677 		if (err)
2678 			break;
2679 
2680 		s->first_displayed_line = 1;
2681 		s->last_displayed_line = view->nlines;
2682 
2683 		diff_view_indicate_progress(view);
2684 		err = create_diff(s);
2685 		break;
2686 	case '>':
2687 	case '.':
2688 		if (s->log_view == NULL)
2689 			break;
2690 		ls = &s->log_view->state.log;
2691 
2692 		if (TAILQ_NEXT(ls->selected_entry, entry) == NULL) {
2693 			ls->thread_args.commits_needed++;
2694 
2695 			/* Display "loading..." in log view. */
2696 			show_log_view(s->log_view);
2697 			update_panels();
2698 			doupdate();
2699 
2700 			err = trigger_log_thread(1 /* load_all */,
2701 			    &ls->thread_args.commits_needed,
2702 			    &ls->thread_args.log_complete,
2703 			    &ls->thread_args.need_commits);
2704 			if (err)
2705 				break;
2706 		}
2707 		err = input_log_view(NULL, NULL, NULL, s->log_view,
2708 		    KEY_DOWN);
2709 		if (err)
2710 			break;
2711 
2712 		entry = TAILQ_NEXT(ls->selected_entry, entry);
2713 		if (entry == NULL)
2714 			break;
2715 
2716 		err = set_selected_commit(s, entry);
2717 		if (err)
2718 			break;
2719 
2720 		s->first_displayed_line = 1;
2721 		s->last_displayed_line = view->nlines;
2722 
2723 		diff_view_indicate_progress(view);
2724 		err = create_diff(s);
2725 		break;
2726 	default:
2727 		break;
2728 	}
2729 
2730 	return err;
2731 }
2732 
2733 static const struct got_error *
2734 cmd_diff(int argc, char *argv[])
2735 {
2736 	const struct got_error *error = NULL;
2737 	struct got_repository *repo = NULL;
2738 	struct got_reflist_head refs;
2739 	struct got_object_id *id1 = NULL, *id2 = NULL;
2740 	char *repo_path = NULL;
2741 	char *id_str1 = NULL, *id_str2 = NULL;
2742 	int ch;
2743 	struct tog_view *view;
2744 
2745 	SIMPLEQ_INIT(&refs);
2746 
2747 #ifndef PROFILE
2748 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
2749 	    NULL) == -1)
2750 		err(1, "pledge");
2751 #endif
2752 
2753 	while ((ch = getopt(argc, argv, "")) != -1) {
2754 		switch (ch) {
2755 		default:
2756 			usage_diff();
2757 			/* NOTREACHED */
2758 		}
2759 	}
2760 
2761 	argc -= optind;
2762 	argv += optind;
2763 
2764 	if (argc == 0) {
2765 		usage_diff(); /* TODO show local worktree changes */
2766 	} else if (argc == 2) {
2767 		repo_path = getcwd(NULL, 0);
2768 		if (repo_path == NULL)
2769 			return got_error_from_errno("getcwd");
2770 		id_str1 = argv[0];
2771 		id_str2 = argv[1];
2772 	} else if (argc == 3) {
2773 		repo_path = realpath(argv[0], NULL);
2774 		if (repo_path == NULL)
2775 			return got_error_from_errno2("realpath", argv[0]);
2776 		id_str1 = argv[1];
2777 		id_str2 = argv[2];
2778 	} else
2779 		usage_diff();
2780 
2781 	init_curses();
2782 
2783 	error = got_repo_open(&repo, repo_path);
2784 	if (error)
2785 		goto done;
2786 
2787 	error = apply_unveil(got_repo_get_path(repo), NULL);
2788 	if (error)
2789 		goto done;
2790 
2791 	error = got_object_resolve_id_str(&id1, repo, id_str1);
2792 	if (error)
2793 		goto done;
2794 
2795 	error = got_object_resolve_id_str(&id2, repo, id_str2);
2796 	if (error)
2797 		goto done;
2798 
2799 	error = got_ref_list(&refs, repo);
2800 	if (error)
2801 		goto done;
2802 
2803 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
2804 	if (view == NULL) {
2805 		error = got_error_from_errno("view_open");
2806 		goto done;
2807 	}
2808 	error = open_diff_view(view, id1, id2, NULL, &refs, repo);
2809 	if (error)
2810 		goto done;
2811 	error = view_loop(view);
2812 done:
2813 	free(repo_path);
2814 	got_repo_close(repo);
2815 	got_ref_list_free(&refs);
2816 	return error;
2817 }
2818 
2819 __dead static void
2820 usage_blame(void)
2821 {
2822 	endwin();
2823 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
2824 	    getprogname());
2825 	exit(1);
2826 }
2827 
2828 struct tog_blame_line {
2829 	int annotated;
2830 	struct got_object_id *id;
2831 };
2832 
2833 static const struct got_error *
2834 draw_blame(struct tog_view *view, struct got_object_id *id, FILE *f,
2835     const char *path, struct tog_blame_line *lines, int nlines,
2836     int blame_complete, int selected_line, int *first_displayed_line,
2837     int *last_displayed_line, int *eof, int max_lines)
2838 {
2839 	const struct got_error *err;
2840 	int lineno = 0, nprinted = 0;
2841 	char *line;
2842 	size_t len;
2843 	wchar_t *wline;
2844 	int width, wlimit;
2845 	struct tog_blame_line *blame_line;
2846 	struct got_object_id *prev_id = NULL;
2847 	char *id_str;
2848 
2849 	err = got_object_id_str(&id_str, id);
2850 	if (err)
2851 		return err;
2852 
2853 	rewind(f);
2854 	werase(view->window);
2855 
2856 	if (asprintf(&line, "commit %s", id_str) == -1) {
2857 		err = got_error_from_errno("asprintf");
2858 		free(id_str);
2859 		return err;
2860 	}
2861 
2862 	err = format_line(&wline, &width, line, view->ncols);
2863 	free(line);
2864 	line = NULL;
2865 	if (view_needs_focus_indication(view))
2866 		wstandout(view->window);
2867 	waddwstr(view->window, wline);
2868 	if (view_needs_focus_indication(view))
2869 		wstandend(view->window);
2870 	free(wline);
2871 	wline = NULL;
2872 	if (width < view->ncols - 1)
2873 		waddch(view->window, '\n');
2874 
2875 	if (asprintf(&line, "[%d/%d] %s%s",
2876 	    *first_displayed_line - 1 + selected_line, nlines,
2877 	    blame_complete ? "" : "annotating... ", path) == -1) {
2878 		free(id_str);
2879 		return got_error_from_errno("asprintf");
2880 	}
2881 	free(id_str);
2882 	err = format_line(&wline, &width, line, view->ncols);
2883 	free(line);
2884 	line = NULL;
2885 	if (err)
2886 		return err;
2887 	waddwstr(view->window, wline);
2888 	free(wline);
2889 	wline = NULL;
2890 	if (width < view->ncols - 1)
2891 		waddch(view->window, '\n');
2892 
2893 	*eof = 0;
2894 	while (nprinted < max_lines - 2) {
2895 		line = parse_next_line(f, &len);
2896 		if (line == NULL) {
2897 			*eof = 1;
2898 			break;
2899 		}
2900 		if (++lineno < *first_displayed_line) {
2901 			free(line);
2902 			continue;
2903 		}
2904 
2905 		wlimit = view->ncols < 9 ? 0 : view->ncols - 9;
2906 		err = format_line(&wline, &width, line, wlimit);
2907 		if (err) {
2908 			free(line);
2909 			return err;
2910 		}
2911 
2912 		if (view->focussed && nprinted == selected_line - 1)
2913 			wstandout(view->window);
2914 
2915 		blame_line = &lines[lineno - 1];
2916 		if (blame_line->annotated && prev_id &&
2917 		    got_object_id_cmp(prev_id, blame_line->id) == 0)
2918 			waddstr(view->window, "         ");
2919 		else if (blame_line->annotated) {
2920 			char *id_str;
2921 			err = got_object_id_str(&id_str, blame_line->id);
2922 			if (err) {
2923 				free(line);
2924 				free(wline);
2925 				return err;
2926 			}
2927 			wprintw(view->window, "%.8s ", id_str);
2928 			free(id_str);
2929 			prev_id = blame_line->id;
2930 		} else {
2931 			waddstr(view->window, "........ ");
2932 			prev_id = NULL;
2933 		}
2934 
2935 		waddwstr(view->window, wline);
2936 		while (width < wlimit) {
2937 			waddch(view->window, ' ');
2938 			width++;
2939 		}
2940 		if (view->focussed && nprinted == selected_line - 1)
2941 			wstandend(view->window);
2942 		if (++nprinted == 1)
2943 			*first_displayed_line = lineno;
2944 		free(line);
2945 		free(wline);
2946 		wline = NULL;
2947 	}
2948 	*last_displayed_line = lineno;
2949 
2950 	view_vborder(view);
2951 
2952 	return NULL;
2953 }
2954 
2955 static const struct got_error *
2956 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
2957 {
2958 	const struct got_error *err = NULL;
2959 	struct tog_blame_cb_args *a = arg;
2960 	struct tog_blame_line *line;
2961 	int errcode;
2962 
2963 	if (nlines != a->nlines ||
2964 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
2965 		return got_error(GOT_ERR_RANGE);
2966 
2967 	errcode = pthread_mutex_lock(&tog_mutex);
2968 	if (errcode)
2969 		return got_error_set_errno(errcode, "pthread_mutex_lock");
2970 
2971 	if (*a->quit) {	/* user has quit the blame view */
2972 		err = got_error(GOT_ERR_ITER_COMPLETED);
2973 		goto done;
2974 	}
2975 
2976 	if (lineno == -1)
2977 		goto done; /* no change in this commit */
2978 
2979 	line = &a->lines[lineno - 1];
2980 	if (line->annotated)
2981 		goto done;
2982 
2983 	line->id = got_object_id_dup(id);
2984 	if (line->id == NULL) {
2985 		err = got_error_from_errno("got_object_id_dup");
2986 		goto done;
2987 	}
2988 	line->annotated = 1;
2989 done:
2990 	errcode = pthread_mutex_unlock(&tog_mutex);
2991 	if (errcode)
2992 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
2993 	return err;
2994 }
2995 
2996 static void *
2997 blame_thread(void *arg)
2998 {
2999 	const struct got_error *err;
3000 	struct tog_blame_thread_args *ta = arg;
3001 	struct tog_blame_cb_args *a = ta->cb_args;
3002 	int errcode;
3003 
3004 	err = got_blame_incremental(ta->path, a->commit_id, ta->repo,
3005 	    blame_cb, ta->cb_args);
3006 
3007 	errcode = pthread_mutex_lock(&tog_mutex);
3008 	if (errcode)
3009 		return (void *)got_error_set_errno(errcode,
3010 		    "pthread_mutex_lock");
3011 
3012 	got_repo_close(ta->repo);
3013 	ta->repo = NULL;
3014 	*ta->complete = 1;
3015 
3016 	errcode = pthread_mutex_unlock(&tog_mutex);
3017 	if (errcode && err == NULL)
3018 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
3019 
3020 	return (void *)err;
3021 }
3022 
3023 static struct got_object_id *
3024 get_selected_commit_id(struct tog_blame_line *lines, int first_displayed_line,
3025     int selected_line)
3026 {
3027 	struct tog_blame_line *line;
3028 
3029 	line = &lines[first_displayed_line - 1 + selected_line - 1];
3030 	if (!line->annotated)
3031 		return NULL;
3032 
3033 	return line->id;
3034 }
3035 
3036 static const struct got_error *
3037 stop_blame(struct tog_blame *blame)
3038 {
3039 	const struct got_error *err = NULL;
3040 	int i;
3041 
3042 	if (blame->thread) {
3043 		int errcode;
3044 		errcode = pthread_mutex_unlock(&tog_mutex);
3045 		if (errcode)
3046 			return got_error_set_errno(errcode,
3047 			    "pthread_mutex_unlock");
3048 		errcode = pthread_join(blame->thread, (void **)&err);
3049 		if (errcode)
3050 			return got_error_set_errno(errcode, "pthread_join");
3051 		errcode = pthread_mutex_lock(&tog_mutex);
3052 		if (errcode)
3053 			return got_error_set_errno(errcode,
3054 			    "pthread_mutex_lock");
3055 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
3056 			err = NULL;
3057 		blame->thread = NULL;
3058 	}
3059 	if (blame->thread_args.repo) {
3060 		got_repo_close(blame->thread_args.repo);
3061 		blame->thread_args.repo = NULL;
3062 	}
3063 	if (blame->f) {
3064 		if (fclose(blame->f) != 0 && err == NULL)
3065 			err = got_error_from_errno("fclose");
3066 		blame->f = NULL;
3067 	}
3068 	if (blame->lines) {
3069 		for (i = 0; i < blame->nlines; i++)
3070 			free(blame->lines[i].id);
3071 		free(blame->lines);
3072 		blame->lines = NULL;
3073 	}
3074 	free(blame->cb_args.commit_id);
3075 	blame->cb_args.commit_id = NULL;
3076 
3077 	return err;
3078 }
3079 
3080 static const struct got_error *
3081 run_blame(struct tog_blame *blame, struct tog_view *view, int *blame_complete,
3082     int *first_displayed_line, int *last_displayed_line, int *selected_line,
3083     int *done, int *eof, const char *path, struct got_object_id *commit_id,
3084     struct got_repository *repo)
3085 {
3086 	const struct got_error *err = NULL;
3087 	struct got_blob_object *blob = NULL;
3088 	struct got_repository *thread_repo = NULL;
3089 	struct got_object_id *obj_id = NULL;
3090 	int obj_type;
3091 
3092 	err = got_object_id_by_path(&obj_id, repo, commit_id, path);
3093 	if (err)
3094 		return err;
3095 	if (obj_id == NULL)
3096 		return got_error(GOT_ERR_NO_OBJ);
3097 
3098 	err = got_object_get_type(&obj_type, repo, obj_id);
3099 	if (err)
3100 		goto done;
3101 
3102 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
3103 		err = got_error(GOT_ERR_OBJ_TYPE);
3104 		goto done;
3105 	}
3106 
3107 	err = got_object_open_as_blob(&blob, repo, obj_id, 8192);
3108 	if (err)
3109 		goto done;
3110 	blame->f = got_opentemp();
3111 	if (blame->f == NULL) {
3112 		err = got_error_from_errno("got_opentemp");
3113 		goto done;
3114 	}
3115 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
3116 	    blame->f, blob);
3117 	if (err)
3118 		goto done;
3119 
3120 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
3121 	if (blame->lines == NULL) {
3122 		err = got_error_from_errno("calloc");
3123 		goto done;
3124 	}
3125 
3126 	err = got_repo_open(&thread_repo, got_repo_get_path(repo));
3127 	if (err)
3128 		goto done;
3129 
3130 	blame->cb_args.view = view;
3131 	blame->cb_args.lines = blame->lines;
3132 	blame->cb_args.nlines = blame->nlines;
3133 	blame->cb_args.commit_id = got_object_id_dup(commit_id);
3134 	if (blame->cb_args.commit_id == NULL) {
3135 		err = got_error_from_errno("got_object_id_dup");
3136 		goto done;
3137 	}
3138 	blame->cb_args.quit = done;
3139 
3140 	blame->thread_args.path = path;
3141 	blame->thread_args.repo = thread_repo;
3142 	blame->thread_args.cb_args = &blame->cb_args;
3143 	blame->thread_args.complete = blame_complete;
3144 	*blame_complete = 0;
3145 
3146 done:
3147 	if (blob)
3148 		got_object_blob_close(blob);
3149 	free(obj_id);
3150 	if (err)
3151 		stop_blame(blame);
3152 	return err;
3153 }
3154 
3155 static const struct got_error *
3156 open_blame_view(struct tog_view *view, char *path,
3157     struct got_object_id *commit_id, struct got_reflist_head *refs,
3158     struct got_repository *repo)
3159 {
3160 	const struct got_error *err = NULL;
3161 	struct tog_blame_view_state *s = &view->state.blame;
3162 
3163 	SIMPLEQ_INIT(&s->blamed_commits);
3164 
3165 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
3166 	if (err)
3167 		return err;
3168 
3169 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
3170 	s->first_displayed_line = 1;
3171 	s->last_displayed_line = view->nlines;
3172 	s->selected_line = 1;
3173 	s->blame_complete = 0;
3174 	s->path = path;
3175 	if (s->path == NULL)
3176 		return got_error_from_errno("open_blame_view");
3177 	s->repo = repo;
3178 	s->refs = refs;
3179 	s->commit_id = commit_id;
3180 	memset(&s->blame, 0, sizeof(s->blame));
3181 
3182 	view->show = show_blame_view;
3183 	view->input = input_blame_view;
3184 	view->close = close_blame_view;
3185 
3186 	return run_blame(&s->blame, view, &s->blame_complete,
3187 	    &s->first_displayed_line, &s->last_displayed_line,
3188 	    &s->selected_line, &s->done, &s->eof, s->path,
3189 	    s->blamed_commit->id, s->repo);
3190 }
3191 
3192 static const struct got_error *
3193 close_blame_view(struct tog_view *view)
3194 {
3195 	const struct got_error *err = NULL;
3196 	struct tog_blame_view_state *s = &view->state.blame;
3197 
3198 	if (s->blame.thread)
3199 		err = stop_blame(&s->blame);
3200 
3201 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
3202 		struct got_object_qid *blamed_commit;
3203 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
3204 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
3205 		got_object_qid_free(blamed_commit);
3206 	}
3207 
3208 	free(s->path);
3209 
3210 	return err;
3211 }
3212 
3213 static const struct got_error *
3214 show_blame_view(struct tog_view *view)
3215 {
3216 	const struct got_error *err = NULL;
3217 	struct tog_blame_view_state *s = &view->state.blame;
3218 	int errcode;
3219 
3220 	if (s->blame.thread == NULL) {
3221 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
3222 		    &s->blame.thread_args);
3223 		if (errcode)
3224 			return got_error_set_errno(errcode, "pthread_create");
3225 	}
3226 
3227 	err = draw_blame(view, s->blamed_commit->id, s->blame.f,
3228 	    s->path, s->blame.lines, s->blame.nlines, s->blame_complete,
3229 	    s->selected_line, &s->first_displayed_line,
3230 	    &s->last_displayed_line, &s->eof, view->nlines);
3231 
3232 	view_vborder(view);
3233 	return err;
3234 }
3235 
3236 static const struct got_error *
3237 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
3238     struct tog_view **focus_view, struct tog_view *view, int ch)
3239 {
3240 	const struct got_error *err = NULL, *thread_err = NULL;
3241 	struct tog_view *diff_view;
3242 	struct tog_blame_view_state *s = &view->state.blame;
3243 	int begin_x = 0;
3244 
3245 	switch (ch) {
3246 	case 'q':
3247 		s->done = 1;
3248 		break;
3249 	case 'k':
3250 	case KEY_UP:
3251 		if (s->selected_line > 1)
3252 			s->selected_line--;
3253 		else if (s->selected_line == 1 &&
3254 		    s->first_displayed_line > 1)
3255 			s->first_displayed_line--;
3256 		break;
3257 	case KEY_PPAGE:
3258 		if (s->first_displayed_line == 1) {
3259 			s->selected_line = 1;
3260 			break;
3261 		}
3262 		if (s->first_displayed_line > view->nlines - 2)
3263 			s->first_displayed_line -=
3264 			    (view->nlines - 2);
3265 		else
3266 			s->first_displayed_line = 1;
3267 		break;
3268 	case 'j':
3269 	case KEY_DOWN:
3270 		if (s->selected_line < view->nlines - 2 &&
3271 		    s->first_displayed_line +
3272 		    s->selected_line <= s->blame.nlines)
3273 			s->selected_line++;
3274 		else if (s->last_displayed_line <
3275 		    s->blame.nlines)
3276 			s->first_displayed_line++;
3277 		break;
3278 	case 'b':
3279 	case 'p': {
3280 		struct got_object_id *id = NULL;
3281 		id = get_selected_commit_id(s->blame.lines,
3282 		    s->first_displayed_line, s->selected_line);
3283 		if (id == NULL)
3284 			break;
3285 		if (ch == 'p') {
3286 			struct got_commit_object *commit;
3287 			struct got_object_qid *pid;
3288 			struct got_object_id *blob_id = NULL;
3289 			int obj_type;
3290 			err = got_object_open_as_commit(&commit,
3291 			    s->repo, id);
3292 			if (err)
3293 				break;
3294 			pid = SIMPLEQ_FIRST(
3295 			    got_object_commit_get_parent_ids(commit));
3296 			if (pid == NULL) {
3297 				got_object_commit_close(commit);
3298 				break;
3299 			}
3300 			/* Check if path history ends here. */
3301 			err = got_object_id_by_path(&blob_id, s->repo,
3302 			    pid->id, s->path);
3303 			if (err) {
3304 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
3305 					err = NULL;
3306 				got_object_commit_close(commit);
3307 				break;
3308 			}
3309 			err = got_object_get_type(&obj_type, s->repo,
3310 			    blob_id);
3311 			free(blob_id);
3312 			/* Can't blame non-blob type objects. */
3313 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
3314 				got_object_commit_close(commit);
3315 				break;
3316 			}
3317 			err = got_object_qid_alloc(&s->blamed_commit,
3318 			    pid->id);
3319 			got_object_commit_close(commit);
3320 		} else {
3321 			if (got_object_id_cmp(id,
3322 			    s->blamed_commit->id) == 0)
3323 				break;
3324 			err = got_object_qid_alloc(&s->blamed_commit,
3325 			    id);
3326 		}
3327 		if (err)
3328 			break;
3329 		s->done = 1;
3330 		thread_err = stop_blame(&s->blame);
3331 		s->done = 0;
3332 		if (thread_err)
3333 			break;
3334 		SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
3335 		    s->blamed_commit, entry);
3336 		err = run_blame(&s->blame, view, &s->blame_complete,
3337 		    &s->first_displayed_line, &s->last_displayed_line,
3338 		    &s->selected_line, &s->done, &s->eof,
3339 		    s->path, s->blamed_commit->id, s->repo);
3340 		if (err)
3341 			break;
3342 		break;
3343 	}
3344 	case 'B': {
3345 		struct got_object_qid *first;
3346 		first = SIMPLEQ_FIRST(&s->blamed_commits);
3347 		if (!got_object_id_cmp(first->id, s->commit_id))
3348 			break;
3349 		s->done = 1;
3350 		thread_err = stop_blame(&s->blame);
3351 		s->done = 0;
3352 		if (thread_err)
3353 			break;
3354 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
3355 		got_object_qid_free(s->blamed_commit);
3356 		s->blamed_commit =
3357 		    SIMPLEQ_FIRST(&s->blamed_commits);
3358 		err = run_blame(&s->blame, view, &s->blame_complete,
3359 		    &s->first_displayed_line, &s->last_displayed_line,
3360 		    &s->selected_line, &s->done, &s->eof, s->path,
3361 		    s->blamed_commit->id, s->repo);
3362 		if (err)
3363 			break;
3364 		break;
3365 	}
3366 	case KEY_ENTER:
3367 	case '\r': {
3368 		struct got_object_id *id = NULL;
3369 		struct got_object_qid *pid;
3370 		struct got_commit_object *commit = NULL;
3371 		id = get_selected_commit_id(s->blame.lines,
3372 		    s->first_displayed_line, s->selected_line);
3373 		if (id == NULL)
3374 			break;
3375 		err = got_object_open_as_commit(&commit, s->repo, id);
3376 		if (err)
3377 			break;
3378 		pid = SIMPLEQ_FIRST(
3379 		    got_object_commit_get_parent_ids(commit));
3380 		if (view_is_parent_view(view))
3381 		    begin_x = view_split_begin_x(view->begin_x);
3382 		diff_view = view_open(0, 0, 0, begin_x, TOG_VIEW_DIFF);
3383 		if (diff_view == NULL) {
3384 			got_object_commit_close(commit);
3385 			err = got_error_from_errno("view_open");
3386 			break;
3387 		}
3388 		err = open_diff_view(diff_view, pid ? pid->id : NULL,
3389 		    id, NULL, s->refs, s->repo);
3390 		got_object_commit_close(commit);
3391 		if (err) {
3392 			view_close(diff_view);
3393 			break;
3394 		}
3395 		if (view_is_parent_view(view)) {
3396 			err = view_close_child(view);
3397 			if (err)
3398 				break;
3399 			err = view_set_child(view, diff_view);
3400 			if (err) {
3401 				view_close(diff_view);
3402 				break;
3403 			}
3404 			*focus_view = diff_view;
3405 			view->child_focussed = 1;
3406 		} else
3407 			*new_view = diff_view;
3408 		if (err)
3409 			break;
3410 		break;
3411 	}
3412 	case KEY_NPAGE:
3413 	case ' ':
3414 		if (s->last_displayed_line >= s->blame.nlines &&
3415 		    s->selected_line >= MIN(s->blame.nlines,
3416 		    view->nlines - 2)) {
3417 			break;
3418 		}
3419 		if (s->last_displayed_line >= s->blame.nlines &&
3420 		    s->selected_line < view->nlines - 2) {
3421 			s->selected_line = MIN(s->blame.nlines,
3422 			    view->nlines - 2);
3423 			break;
3424 		}
3425 		if (s->last_displayed_line + view->nlines - 2
3426 		    <= s->blame.nlines)
3427 			s->first_displayed_line +=
3428 			    view->nlines - 2;
3429 		else
3430 			s->first_displayed_line =
3431 			    s->blame.nlines -
3432 			    (view->nlines - 3);
3433 		break;
3434 	case KEY_RESIZE:
3435 		if (s->selected_line > view->nlines - 2) {
3436 			s->selected_line = MIN(s->blame.nlines,
3437 			    view->nlines - 2);
3438 		}
3439 		break;
3440 	default:
3441 		break;
3442 	}
3443 	return thread_err ? thread_err : err;
3444 }
3445 
3446 static const struct got_error *
3447 cmd_blame(int argc, char *argv[])
3448 {
3449 	const struct got_error *error;
3450 	struct got_repository *repo = NULL;
3451 	struct got_reflist_head refs;
3452 	struct got_worktree *worktree = NULL;
3453 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
3454 	struct got_object_id *commit_id = NULL;
3455 	char *commit_id_str = NULL;
3456 	int ch;
3457 	struct tog_view *view;
3458 
3459 	SIMPLEQ_INIT(&refs);
3460 
3461 #ifndef PROFILE
3462 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
3463 	    NULL) == -1)
3464 		err(1, "pledge");
3465 #endif
3466 
3467 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
3468 		switch (ch) {
3469 		case 'c':
3470 			commit_id_str = optarg;
3471 			break;
3472 		case 'r':
3473 			repo_path = realpath(optarg, NULL);
3474 			if (repo_path == NULL)
3475 				err(1, "-r option");
3476 			break;
3477 		default:
3478 			usage_blame();
3479 			/* NOTREACHED */
3480 		}
3481 	}
3482 
3483 	argc -= optind;
3484 	argv += optind;
3485 
3486 	if (argc == 1)
3487 		path = argv[0];
3488 	else
3489 		usage_blame();
3490 
3491 	cwd = getcwd(NULL, 0);
3492 	if (cwd == NULL) {
3493 		error = got_error_from_errno("getcwd");
3494 		goto done;
3495 	}
3496 	if (repo_path == NULL) {
3497 		error = got_worktree_open(&worktree, cwd);
3498 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3499 			goto done;
3500 		else
3501 			error = NULL;
3502 		if (worktree) {
3503 			repo_path =
3504 			    strdup(got_worktree_get_repo_path(worktree));
3505 			if (repo_path == NULL)
3506 				error = got_error_from_errno("strdup");
3507 			if (error)
3508 				goto done;
3509 		} else {
3510 			repo_path = strdup(cwd);
3511 			if (repo_path == NULL) {
3512 				error = got_error_from_errno("strdup");
3513 				goto done;
3514 			}
3515 		}
3516 	}
3517 
3518 	init_curses();
3519 
3520 	error = got_repo_open(&repo, repo_path);
3521 	if (error != NULL)
3522 		goto done;
3523 
3524 	error = apply_unveil(got_repo_get_path(repo), NULL);
3525 	if (error)
3526 		goto done;
3527 
3528 	if (worktree) {
3529 		const char *prefix = got_worktree_get_path_prefix(worktree);
3530 		char *p, *worktree_subdir = cwd +
3531 		    strlen(got_worktree_get_root_path(worktree));
3532 		if (asprintf(&p, "%s%s%s%s%s",
3533 		    prefix, (strcmp(prefix, "/") != 0) ? "/" : "",
3534 		    worktree_subdir, worktree_subdir[0] ? "/" : "",
3535 		    path) == -1) {
3536 			error = got_error_from_errno("asprintf");
3537 			goto done;
3538 		}
3539 		error = got_repo_map_path(&in_repo_path, repo, p, 0);
3540 		free(p);
3541 	} else {
3542 		error = got_repo_map_path(&in_repo_path, repo, path, 1);
3543 	}
3544 	if (error)
3545 		goto done;
3546 
3547 	if (commit_id_str == NULL) {
3548 		struct got_reference *head_ref;
3549 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0);
3550 		if (error != NULL)
3551 			goto done;
3552 		error = got_ref_resolve(&commit_id, repo, head_ref);
3553 		got_ref_close(head_ref);
3554 	} else {
3555 		error = got_object_resolve_id_str(&commit_id, repo,
3556 		    commit_id_str);
3557 	}
3558 	if (error != NULL)
3559 		goto done;
3560 
3561 	error = got_ref_list(&refs, repo);
3562 	if (error)
3563 		goto done;
3564 
3565 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
3566 	if (view == NULL) {
3567 		error = got_error_from_errno("view_open");
3568 		goto done;
3569 	}
3570 	error = open_blame_view(view, in_repo_path, commit_id, &refs, repo);
3571 	if (error)
3572 		goto done;
3573 	error = view_loop(view);
3574 done:
3575 	free(repo_path);
3576 	free(cwd);
3577 	free(commit_id);
3578 	if (worktree)
3579 		got_worktree_close(worktree);
3580 	if (repo)
3581 		got_repo_close(repo);
3582 	got_ref_list_free(&refs);
3583 	return error;
3584 }
3585 
3586 static const struct got_error *
3587 draw_tree_entries(struct tog_view *view,
3588     struct got_tree_entry **first_displayed_entry,
3589     struct got_tree_entry **last_displayed_entry,
3590     struct got_tree_entry **selected_entry, int *ndisplayed,
3591     const char *label, int show_ids, const char *parent_path,
3592     const struct got_tree_entries *entries, int selected, int limit, int isroot)
3593 {
3594 	const struct got_error *err = NULL;
3595 	struct got_tree_entry *te;
3596 	wchar_t *wline;
3597 	int width, n;
3598 
3599 	*ndisplayed = 0;
3600 
3601 	werase(view->window);
3602 
3603 	if (limit == 0)
3604 		return NULL;
3605 
3606 	err = format_line(&wline, &width, label, view->ncols);
3607 	if (err)
3608 		return err;
3609 	if (view_needs_focus_indication(view))
3610 		wstandout(view->window);
3611 	waddwstr(view->window, wline);
3612 	if (view_needs_focus_indication(view))
3613 		wstandend(view->window);
3614 	free(wline);
3615 	wline = NULL;
3616 	if (width < view->ncols - 1)
3617 		waddch(view->window, '\n');
3618 	if (--limit <= 0)
3619 		return NULL;
3620 	err = format_line(&wline, &width, parent_path, view->ncols);
3621 	if (err)
3622 		return err;
3623 	waddwstr(view->window, wline);
3624 	free(wline);
3625 	wline = NULL;
3626 	if (width < view->ncols - 1)
3627 		waddch(view->window, '\n');
3628 	if (--limit <= 0)
3629 		return NULL;
3630 	waddch(view->window, '\n');
3631 	if (--limit <= 0)
3632 		return NULL;
3633 
3634 	te = SIMPLEQ_FIRST(&entries->head);
3635 	if (*first_displayed_entry == NULL) {
3636 		if (selected == 0) {
3637 			if (view->focussed)
3638 				wstandout(view->window);
3639 			*selected_entry = NULL;
3640 		}
3641 		waddstr(view->window, "  ..\n");	/* parent directory */
3642 		if (selected == 0 && view->focussed)
3643 			wstandend(view->window);
3644 		(*ndisplayed)++;
3645 		if (--limit <= 0)
3646 			return NULL;
3647 		n = 1;
3648 	} else {
3649 		n = 0;
3650 		while (te != *first_displayed_entry)
3651 			te = SIMPLEQ_NEXT(te, entry);
3652 	}
3653 
3654 	while (te) {
3655 		char *line = NULL, *id_str = NULL;
3656 
3657 		if (show_ids) {
3658 			err = got_object_id_str(&id_str, te->id);
3659 			if (err)
3660 				return got_error_from_errno(
3661 				    "got_object_id_str");
3662 		}
3663 		if (asprintf(&line, "%s  %s%s", id_str ? id_str : "",
3664 		    te->name, S_ISDIR(te->mode) ? "/" :
3665 		    ((te->mode & S_IXUSR) ? "*" : "")) == -1) {
3666 			free(id_str);
3667 			return got_error_from_errno("asprintf");
3668 		}
3669 		free(id_str);
3670 		err = format_line(&wline, &width, line, view->ncols);
3671 		if (err) {
3672 			free(line);
3673 			break;
3674 		}
3675 		if (n == selected) {
3676 			if (view->focussed)
3677 				wstandout(view->window);
3678 			*selected_entry = te;
3679 		}
3680 		waddwstr(view->window, wline);
3681 		if (width < view->ncols - 1)
3682 			waddch(view->window, '\n');
3683 		if (n == selected && view->focussed)
3684 			wstandend(view->window);
3685 		free(line);
3686 		free(wline);
3687 		wline = NULL;
3688 		n++;
3689 		(*ndisplayed)++;
3690 		*last_displayed_entry = te;
3691 		if (--limit <= 0)
3692 			break;
3693 		te = SIMPLEQ_NEXT(te, entry);
3694 	}
3695 
3696 	return err;
3697 }
3698 
3699 static void
3700 tree_scroll_up(struct tog_view *view,
3701     struct got_tree_entry **first_displayed_entry, int maxscroll,
3702     const struct got_tree_entries *entries, int isroot)
3703 {
3704 	struct got_tree_entry *te, *prev;
3705 	int i;
3706 
3707 	if (*first_displayed_entry == NULL)
3708 		return;
3709 
3710 	te = SIMPLEQ_FIRST(&entries->head);
3711 	if (*first_displayed_entry == te) {
3712 		if (!isroot)
3713 			*first_displayed_entry = NULL;
3714 		return;
3715 	}
3716 
3717 	/* XXX this is stupid... switch to TAILQ? */
3718 	for (i = 0; i < maxscroll; i++) {
3719 		while (te != *first_displayed_entry) {
3720 			prev = te;
3721 			te = SIMPLEQ_NEXT(te, entry);
3722 		}
3723 		*first_displayed_entry = prev;
3724 		te = SIMPLEQ_FIRST(&entries->head);
3725 	}
3726 	if (!isroot && te == SIMPLEQ_FIRST(&entries->head) && i < maxscroll)
3727 		*first_displayed_entry = NULL;
3728 }
3729 
3730 static int
3731 tree_scroll_down(struct got_tree_entry **first_displayed_entry, int maxscroll,
3732 	struct got_tree_entry *last_displayed_entry,
3733 	const struct got_tree_entries *entries)
3734 {
3735 	struct got_tree_entry *next, *last;
3736 	int n = 0;
3737 
3738 	if (*first_displayed_entry)
3739 		next = SIMPLEQ_NEXT(*first_displayed_entry, entry);
3740 	else
3741 		next = SIMPLEQ_FIRST(&entries->head);
3742 	last = last_displayed_entry;
3743 	while (next && last && n++ < maxscroll) {
3744 		last = SIMPLEQ_NEXT(last, entry);
3745 		if (last) {
3746 			*first_displayed_entry = next;
3747 			next = SIMPLEQ_NEXT(next, entry);
3748 		}
3749 	}
3750 	return n;
3751 }
3752 
3753 static const struct got_error *
3754 tree_entry_path(char **path, struct tog_parent_trees *parents,
3755     struct got_tree_entry *te)
3756 {
3757 	const struct got_error *err = NULL;
3758 	struct tog_parent_tree *pt;
3759 	size_t len = 2; /* for leading slash and NUL */
3760 
3761 	TAILQ_FOREACH(pt, parents, entry)
3762 		len += strlen(pt->selected_entry->name) + 1 /* slash */;
3763 	if (te)
3764 		len += strlen(te->name);
3765 
3766 	*path = calloc(1, len);
3767 	if (path == NULL)
3768 		return got_error_from_errno("calloc");
3769 
3770 	(*path)[0] = '/';
3771 	pt = TAILQ_LAST(parents, tog_parent_trees);
3772 	while (pt) {
3773 		if (strlcat(*path, pt->selected_entry->name, len) >= len) {
3774 			err = got_error(GOT_ERR_NO_SPACE);
3775 			goto done;
3776 		}
3777 		if (strlcat(*path, "/", len) >= len) {
3778 			err = got_error(GOT_ERR_NO_SPACE);
3779 			goto done;
3780 		}
3781 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
3782 	}
3783 	if (te) {
3784 		if (strlcat(*path, te->name, len) >= len) {
3785 			err = got_error(GOT_ERR_NO_SPACE);
3786 			goto done;
3787 		}
3788 	}
3789 done:
3790 	if (err) {
3791 		free(*path);
3792 		*path = NULL;
3793 	}
3794 	return err;
3795 }
3796 
3797 static const struct got_error *
3798 blame_tree_entry(struct tog_view **new_view, int begin_x,
3799     struct got_tree_entry *te, struct tog_parent_trees *parents,
3800     struct got_object_id *commit_id, struct got_reflist_head *refs,
3801     struct got_repository *repo)
3802 {
3803 	const struct got_error *err = NULL;
3804 	char *path;
3805 	struct tog_view *blame_view;
3806 
3807 	err = tree_entry_path(&path, parents, te);
3808 	if (err)
3809 		return err;
3810 
3811 	blame_view = view_open(0, 0, 0, begin_x, TOG_VIEW_BLAME);
3812 	if (blame_view == NULL)
3813 		return got_error_from_errno("view_open");
3814 
3815 	err = open_blame_view(blame_view, path, commit_id, refs, repo);
3816 	if (err) {
3817 		view_close(blame_view);
3818 		free(path);
3819 	} else
3820 		*new_view = blame_view;
3821 	return err;
3822 }
3823 
3824 static const struct got_error *
3825 log_tree_entry(struct tog_view **new_view, int begin_x,
3826     struct got_tree_entry *te, struct tog_parent_trees *parents,
3827     struct got_object_id *commit_id, struct got_reflist_head *refs,
3828     struct got_repository *repo)
3829 {
3830 	struct tog_view *log_view;
3831 	const struct got_error *err = NULL;
3832 	char *path;
3833 
3834 	log_view = view_open(0, 0, 0, begin_x, TOG_VIEW_LOG);
3835 	if (log_view == NULL)
3836 		return got_error_from_errno("view_open");
3837 
3838 	err = tree_entry_path(&path, parents, te);
3839 	if (err)
3840 		return err;
3841 
3842 	err = open_log_view(log_view, commit_id, refs, repo, path, 0);
3843 	if (err)
3844 		view_close(log_view);
3845 	else
3846 		*new_view = log_view;
3847 	free(path);
3848 	return err;
3849 }
3850 
3851 static const struct got_error *
3852 open_tree_view(struct tog_view *view, struct got_tree_object *root,
3853     struct got_object_id *commit_id, struct got_reflist_head *refs,
3854     struct got_repository *repo)
3855 {
3856 	const struct got_error *err = NULL;
3857 	char *commit_id_str = NULL;
3858 	struct tog_tree_view_state *s = &view->state.tree;
3859 
3860 	TAILQ_INIT(&s->parents);
3861 
3862 	err = got_object_id_str(&commit_id_str, commit_id);
3863 	if (err != NULL)
3864 		goto done;
3865 
3866 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
3867 		err = got_error_from_errno("asprintf");
3868 		goto done;
3869 	}
3870 
3871 	s->root = s->tree = root;
3872 	s->entries = got_object_tree_get_entries(root);
3873 	s->first_displayed_entry = SIMPLEQ_FIRST(&s->entries->head);
3874 	s->commit_id = got_object_id_dup(commit_id);
3875 	if (s->commit_id == NULL) {
3876 		err = got_error_from_errno("got_object_id_dup");
3877 		goto done;
3878 	}
3879 	s->refs = refs;
3880 	s->repo = repo;
3881 
3882 	view->show = show_tree_view;
3883 	view->input = input_tree_view;
3884 	view->close = close_tree_view;
3885 done:
3886 	free(commit_id_str);
3887 	if (err) {
3888 		free(s->tree_label);
3889 		s->tree_label = NULL;
3890 	}
3891 	return err;
3892 }
3893 
3894 static const struct got_error *
3895 close_tree_view(struct tog_view *view)
3896 {
3897 	struct tog_tree_view_state *s = &view->state.tree;
3898 
3899 	free(s->tree_label);
3900 	s->tree_label = NULL;
3901 	free(s->commit_id);
3902 	s->commit_id = NULL;
3903 	while (!TAILQ_EMPTY(&s->parents)) {
3904 		struct tog_parent_tree *parent;
3905 		parent = TAILQ_FIRST(&s->parents);
3906 		TAILQ_REMOVE(&s->parents, parent, entry);
3907 		free(parent);
3908 
3909 	}
3910 	if (s->tree != s->root)
3911 		got_object_tree_close(s->tree);
3912 	got_object_tree_close(s->root);
3913 
3914 	return NULL;
3915 }
3916 
3917 static const struct got_error *
3918 show_tree_view(struct tog_view *view)
3919 {
3920 	const struct got_error *err = NULL;
3921 	struct tog_tree_view_state *s = &view->state.tree;
3922 	char *parent_path;
3923 
3924 	err = tree_entry_path(&parent_path, &s->parents, NULL);
3925 	if (err)
3926 		return err;
3927 
3928 	err = draw_tree_entries(view, &s->first_displayed_entry,
3929 	    &s->last_displayed_entry, &s->selected_entry,
3930 	    &s->ndisplayed, s->tree_label, s->show_ids, parent_path,
3931 	    s->entries, s->selected, view->nlines, s->tree == s->root);
3932 	free(parent_path);
3933 
3934 	view_vborder(view);
3935 	return err;
3936 }
3937 
3938 static const struct got_error *
3939 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
3940     struct tog_view **focus_view, struct tog_view *view, int ch)
3941 {
3942 	const struct got_error *err = NULL;
3943 	struct tog_tree_view_state *s = &view->state.tree;
3944 	struct tog_view *log_view;
3945 	int begin_x = 0, nscrolled;
3946 
3947 	switch (ch) {
3948 	case 'i':
3949 		s->show_ids = !s->show_ids;
3950 		break;
3951 	case 'l':
3952 		if (!s->selected_entry)
3953 			break;
3954 		if (view_is_parent_view(view))
3955 			begin_x = view_split_begin_x(view->begin_x);
3956 		err = log_tree_entry(&log_view, begin_x,
3957 		    s->selected_entry, &s->parents,
3958 		    s->commit_id, s->refs, s->repo);
3959 		if (view_is_parent_view(view)) {
3960 			err = view_close_child(view);
3961 			if (err)
3962 				return err;
3963 			err = view_set_child(view, log_view);
3964 			if (err) {
3965 				view_close(log_view);
3966 				break;
3967 			}
3968 			*focus_view = log_view;
3969 			view->child_focussed = 1;
3970 		} else
3971 			*new_view = log_view;
3972 		break;
3973 	case 'k':
3974 	case KEY_UP:
3975 		if (s->selected > 0) {
3976 			s->selected--;
3977 			if (s->selected == 0)
3978 				break;
3979 		}
3980 		if (s->selected > 0)
3981 			break;
3982 		tree_scroll_up(view, &s->first_displayed_entry, 1,
3983 		    s->entries, s->tree == s->root);
3984 		break;
3985 	case KEY_PPAGE:
3986 		tree_scroll_up(view, &s->first_displayed_entry,
3987 		    MAX(0, view->nlines - 4 - s->selected), s->entries,
3988 		    s->tree == s->root);
3989 		s->selected = 0;
3990 		if (SIMPLEQ_FIRST(&s->entries->head) ==
3991 		    s->first_displayed_entry && s->tree != s->root)
3992 			s->first_displayed_entry = NULL;
3993 		break;
3994 	case 'j':
3995 	case KEY_DOWN:
3996 		if (s->selected < s->ndisplayed - 1) {
3997 			s->selected++;
3998 			break;
3999 		}
4000 		if (SIMPLEQ_NEXT(s->last_displayed_entry, entry) == NULL)
4001 			/* can't scroll any further */
4002 			break;
4003 		tree_scroll_down(&s->first_displayed_entry, 1,
4004 		    s->last_displayed_entry, s->entries);
4005 		break;
4006 	case KEY_NPAGE:
4007 		if (SIMPLEQ_NEXT(s->last_displayed_entry, entry)
4008 		    == NULL) {
4009 			/* can't scroll any further; move cursor down */
4010 			if (s->selected < s->ndisplayed - 1)
4011 				s->selected = s->ndisplayed - 1;
4012 			break;
4013 		}
4014 		nscrolled = tree_scroll_down(&s->first_displayed_entry,
4015 		    view->nlines, s->last_displayed_entry, s->entries);
4016 		if (nscrolled < view->nlines) {
4017 			int ndisplayed = 0;
4018 			struct got_tree_entry *te;
4019 			te = s->first_displayed_entry;
4020 			do {
4021 				ndisplayed++;
4022 				te = SIMPLEQ_NEXT(te, entry);
4023 			} while (te);
4024 			s->selected = ndisplayed - 1;
4025 		}
4026 		break;
4027 	case KEY_ENTER:
4028 	case '\r':
4029 	case KEY_BACKSPACE:
4030 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
4031 			struct tog_parent_tree *parent;
4032 			/* user selected '..' */
4033 			if (s->tree == s->root)
4034 				break;
4035 			parent = TAILQ_FIRST(&s->parents);
4036 			TAILQ_REMOVE(&s->parents, parent,
4037 			    entry);
4038 			got_object_tree_close(s->tree);
4039 			s->tree = parent->tree;
4040 			s->entries =
4041 			    got_object_tree_get_entries(s->tree);
4042 			s->first_displayed_entry =
4043 			    parent->first_displayed_entry;
4044 			s->selected_entry =
4045 			    parent->selected_entry;
4046 			s->selected = parent->selected;
4047 			free(parent);
4048 		} else if (S_ISDIR(s->selected_entry->mode)) {
4049 			struct got_tree_object *subtree;
4050 			err = got_object_open_as_tree(&subtree,
4051 			    s->repo, s->selected_entry->id);
4052 			if (err)
4053 				break;
4054 			err = tree_view_visit_subtree(subtree, s);
4055 			if (err) {
4056 				got_object_tree_close(subtree);
4057 				break;
4058 			}
4059 		} else if (S_ISREG(s->selected_entry->mode)) {
4060 			struct tog_view *blame_view;
4061 			int begin_x = view_is_parent_view(view) ?
4062 			    view_split_begin_x(view->begin_x) : 0;
4063 
4064 			err = blame_tree_entry(&blame_view, begin_x,
4065 			    s->selected_entry, &s->parents,
4066 			    s->commit_id, s->refs, s->repo);
4067 			if (err)
4068 				break;
4069 			if (view_is_parent_view(view)) {
4070 				err = view_close_child(view);
4071 				if (err)
4072 					return err;
4073 				err = view_set_child(view, blame_view);
4074 				if (err) {
4075 					view_close(blame_view);
4076 					break;
4077 				}
4078 				*focus_view = blame_view;
4079 				view->child_focussed = 1;
4080 			} else
4081 				*new_view = blame_view;
4082 		}
4083 		break;
4084 	case KEY_RESIZE:
4085 		if (s->selected > view->nlines)
4086 			s->selected = s->ndisplayed - 1;
4087 		break;
4088 	default:
4089 		break;
4090 	}
4091 
4092 	return err;
4093 }
4094 
4095 __dead static void
4096 usage_tree(void)
4097 {
4098 	endwin();
4099 	fprintf(stderr, "usage: %s tree [-c commit] [repository-path]\n",
4100 	    getprogname());
4101 	exit(1);
4102 }
4103 
4104 static const struct got_error *
4105 cmd_tree(int argc, char *argv[])
4106 {
4107 	const struct got_error *error;
4108 	struct got_repository *repo = NULL;
4109 	struct got_reflist_head refs;
4110 	char *repo_path = NULL;
4111 	struct got_object_id *commit_id = NULL;
4112 	char *commit_id_arg = NULL;
4113 	struct got_commit_object *commit = NULL;
4114 	struct got_tree_object *tree = NULL;
4115 	int ch;
4116 	struct tog_view *view;
4117 
4118 	SIMPLEQ_INIT(&refs);
4119 
4120 #ifndef PROFILE
4121 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
4122 	    NULL) == -1)
4123 		err(1, "pledge");
4124 #endif
4125 
4126 	while ((ch = getopt(argc, argv, "c:")) != -1) {
4127 		switch (ch) {
4128 		case 'c':
4129 			commit_id_arg = optarg;
4130 			break;
4131 		default:
4132 			usage_tree();
4133 			/* NOTREACHED */
4134 		}
4135 	}
4136 
4137 	argc -= optind;
4138 	argv += optind;
4139 
4140 	if (argc == 0) {
4141 		struct got_worktree *worktree;
4142 		char *cwd = getcwd(NULL, 0);
4143 		if (cwd == NULL)
4144 			return got_error_from_errno("getcwd");
4145 		error = got_worktree_open(&worktree, cwd);
4146 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4147 			goto done;
4148 		if (worktree) {
4149 			free(cwd);
4150 			repo_path =
4151 			    strdup(got_worktree_get_repo_path(worktree));
4152 			got_worktree_close(worktree);
4153 		} else
4154 			repo_path = cwd;
4155 		if (repo_path == NULL) {
4156 			error = got_error_from_errno("strdup");
4157 			goto done;
4158 		}
4159 	} else if (argc == 1) {
4160 		repo_path = realpath(argv[0], NULL);
4161 		if (repo_path == NULL)
4162 			return got_error_from_errno2("realpath", argv[0]);
4163 	} else
4164 		usage_log();
4165 
4166 	init_curses();
4167 
4168 	error = got_repo_open(&repo, repo_path);
4169 	if (error != NULL)
4170 		goto done;
4171 
4172 	error = apply_unveil(got_repo_get_path(repo), NULL);
4173 	if (error)
4174 		goto done;
4175 
4176 	if (commit_id_arg == NULL)
4177 		error = get_head_commit_id(&commit_id, GOT_REF_HEAD, repo);
4178 	else
4179 		error = got_object_resolve_id_str(&commit_id, repo,
4180 		    commit_id_arg);
4181 	if (error != NULL)
4182 		goto done;
4183 
4184 	error = got_object_open_as_commit(&commit, repo, commit_id);
4185 	if (error != NULL)
4186 		goto done;
4187 
4188 	error = got_object_open_as_tree(&tree, repo,
4189 	    got_object_commit_get_tree_id(commit));
4190 	if (error != NULL)
4191 		goto done;
4192 
4193 	error = got_ref_list(&refs, repo);
4194 	if (error)
4195 		goto done;
4196 
4197 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
4198 	if (view == NULL) {
4199 		error = got_error_from_errno("view_open");
4200 		goto done;
4201 	}
4202 	error = open_tree_view(view, tree, commit_id, &refs, repo);
4203 	if (error)
4204 		goto done;
4205 	error = view_loop(view);
4206 done:
4207 	free(repo_path);
4208 	free(commit_id);
4209 	if (commit)
4210 		got_object_commit_close(commit);
4211 	if (tree)
4212 		got_object_tree_close(tree);
4213 	if (repo)
4214 		got_repo_close(repo);
4215 	got_ref_list_free(&refs);
4216 	return error;
4217 }
4218 
4219 __dead static void
4220 usage(void)
4221 {
4222 	int i;
4223 
4224 	fprintf(stderr, "usage: %s [-h] [command] [arg ...]\n\n"
4225 	    "Available commands:\n", getprogname());
4226 	for (i = 0; i < nitems(tog_commands); i++) {
4227 		struct tog_cmd *cmd = &tog_commands[i];
4228 		fprintf(stderr, "    %s: %s\n", cmd->name, cmd->descr);
4229 	}
4230 	exit(1);
4231 }
4232 
4233 static char **
4234 make_argv(const char *arg0, const char *arg1)
4235 {
4236 	char **argv;
4237 	int argc = (arg1 == NULL ? 1 : 2);
4238 
4239 	argv = calloc(argc, sizeof(char *));
4240 	if (argv == NULL)
4241 		err(1, "calloc");
4242 	argv[0] = strdup(arg0);
4243 	if (argv[0] == NULL)
4244 		err(1, "calloc");
4245 	if (arg1) {
4246 		argv[1] = strdup(arg1);
4247 		if (argv[1] == NULL)
4248 			err(1, "calloc");
4249 	}
4250 
4251 	return argv;
4252 }
4253 
4254 int
4255 main(int argc, char *argv[])
4256 {
4257 	const struct got_error *error = NULL;
4258 	struct tog_cmd *cmd = NULL;
4259 	int ch, hflag = 0;
4260 	char **cmd_argv = NULL;
4261 
4262 	setlocale(LC_CTYPE, "");
4263 
4264 	while ((ch = getopt(argc, argv, "h")) != -1) {
4265 		switch (ch) {
4266 		case 'h':
4267 			hflag = 1;
4268 			break;
4269 		default:
4270 			usage();
4271 			/* NOTREACHED */
4272 		}
4273 	}
4274 
4275 	argc -= optind;
4276 	argv += optind;
4277 	optind = 0;
4278 	optreset = 1;
4279 
4280 	if (argc == 0) {
4281 		if (hflag)
4282 			usage();
4283 		/* Build an argument vector which runs a default command. */
4284 		cmd = &tog_commands[0];
4285 		cmd_argv = make_argv(cmd->name, NULL);
4286 		argc = 1;
4287 	} else {
4288 		int i;
4289 
4290 		/* Did the user specific a command? */
4291 		for (i = 0; i < nitems(tog_commands); i++) {
4292 			if (strncmp(tog_commands[i].name, argv[0],
4293 			    strlen(argv[0])) == 0) {
4294 				cmd = &tog_commands[i];
4295 				if (hflag)
4296 					tog_commands[i].cmd_usage();
4297 				break;
4298 			}
4299 		}
4300 		if (cmd == NULL) {
4301 			/* Did the user specify a repository? */
4302 			char *repo_path = realpath(argv[0], NULL);
4303 			if (repo_path) {
4304 				struct got_repository *repo;
4305 				error = got_repo_open(&repo, repo_path);
4306 				if (error == NULL)
4307 					got_repo_close(repo);
4308 			} else
4309 				error = got_error_from_errno2("realpath",
4310 				    argv[0]);
4311 			if (error) {
4312 				if (hflag) {
4313 					fprintf(stderr, "%s: '%s' is not a "
4314 					    "known command\n", getprogname(),
4315 					    argv[0]);
4316 					usage();
4317 				}
4318 				fprintf(stderr, "%s: '%s' is neither a known "
4319 				    "command nor a path to a repository\n",
4320 				    getprogname(), argv[0]);
4321 				free(repo_path);
4322 				return 1;
4323 			}
4324 			cmd = &tog_commands[0];
4325 			cmd_argv = make_argv(cmd->name, repo_path);
4326 			argc = 2;
4327 			free(repo_path);
4328 		}
4329 	}
4330 
4331 	error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
4332 	if (error)
4333 		goto done;
4334 done:
4335 	endwin();
4336 	free(cmd_argv);
4337 	if (error)
4338 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
4339 	return 0;
4340 }