1 /*
2  * Copyright (c) 2018 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 
20 #include <errno.h>
21 #define _XOPEN_SOURCE_EXTENDED
22 #include <curses.h>
23 #undef _XOPEN_SOURCE_EXTENDED
24 #include <panel.h>
25 #include <locale.h>
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <getopt.h>
29 #include <string.h>
30 #include <err.h>
31 #include <unistd.h>
32 #include <util.h>
33 #include <limits.h>
34 #include <wchar.h>
35 #include <time.h>
36 #include <pthread.h>
37 
38 #include "got_error.h"
39 #include "got_object.h"
40 #include "got_reference.h"
41 #include "got_repository.h"
42 #include "got_diff.h"
43 #include "got_opentemp.h"
44 #include "got_commit_graph.h"
45 #include "got_utf8.h"
46 #include "got_blame.h"
47 
48 #ifndef MIN
49 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
50 #endif
51 
52 #ifndef nitems
53 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
54 #endif
55 
56 struct tog_cmd {
57 	const char *name;
58 	const struct got_error *(*cmd_main)(int, char *[]);
59 	void (*cmd_usage)(void);
60 	const char *descr;
61 };
62 
63 __dead static void	usage(void);
64 __dead static void	usage_log(void);
65 __dead static void	usage_diff(void);
66 __dead static void	usage_blame(void);
67 __dead static void	usage_tree(void);
68 
69 static const struct got_error*	cmd_log(int, char *[]);
70 static const struct got_error*	cmd_diff(int, char *[]);
71 static const struct got_error*	cmd_blame(int, char *[]);
72 static const struct got_error*	cmd_tree(int, char *[]);
73 
74 static struct tog_cmd tog_commands[] = {
75 	{ "log",	cmd_log,	usage_log,
76 	    "show repository history" },
77 	{ "diff",	cmd_diff,	usage_diff,
78 	    "compare files and directories" },
79 	{ "blame",	cmd_blame,	usage_blame,
80 	    "show line-by-line file history" },
81 	{ "tree",	cmd_tree,	usage_tree,
82 	    "browse trees in repository" },
83 };
84 
85 enum tog_view_type {
86 	TOG_VIEW_DIFF,
87 	TOG_VIEW_LOG,
88 	TOG_VIEW_BLAME,
89 	TOG_VIEW_TREE
90 };
91 
92 struct tog_diff_view_state {
93 	FILE *f;
94 	int first_displayed_line;
95 	int last_displayed_line;
96 	int eof;
97 };
98 
99 struct commit_queue_entry {
100 	TAILQ_ENTRY(commit_queue_entry) entry;
101 	struct got_object_id *id;
102 	struct got_commit_object *commit;
103 };
104 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
105 struct commit_queue {
106 	int ncommits;
107 	struct commit_queue_head head;
108 };
109 
110 struct tog_log_view_state {
111 	struct got_commit_graph *graph;
112 	struct commit_queue commits;
113 	struct commit_queue_entry *first_displayed_entry;
114 	struct commit_queue_entry *last_displayed_entry;
115 	struct commit_queue_entry *selected_entry;
116 	int selected;
117 	char *in_repo_path;
118 	struct got_repository *repo;
119 };
120 
121 struct tog_blame_cb_args {
122 	pthread_mutex_t *mutex;
123 	struct tog_blame_line *lines; /* one per line */
124 	int nlines;
125 
126 	struct tog_view *view;
127 	struct got_object_id *commit_id;
128 	FILE *f;
129 	const char *path;
130 	int *first_displayed_line;
131 	int *last_displayed_line;
132 	int *selected_line;
133 	int *quit;
134 	int *eof;
135 };
136 
137 struct tog_blame_thread_args {
138 	const char *path;
139 	struct got_repository *repo;
140 	struct tog_blame_cb_args *cb_args;
141 	int *complete;
142 };
143 
144 struct tog_blame {
145 	FILE *f;
146 	size_t filesize;
147 	struct tog_blame_line *lines;
148 	size_t nlines;
149 	pthread_t thread;
150 	struct tog_blame_thread_args thread_args;
151 	struct tog_blame_cb_args cb_args;
152 	const char *path;
153 };
154 
155 struct tog_blame_view_state {
156 	int first_displayed_line;
157 	int last_displayed_line;
158 	int selected_line;
159 	int blame_complete;
160 	int eof;
161 	int done;
162 	pthread_mutex_t mutex;
163 	struct got_object_id_queue blamed_commits;
164 	struct got_object_qid *blamed_commit;
165 	char *path;
166 	struct got_repository *repo;
167 	struct got_object_id *commit_id;
168 	struct tog_blame blame;
169 };
170 
171 struct tog_parent_tree {
172 	TAILQ_ENTRY(tog_parent_tree) entry;
173 	struct got_tree_object *tree;
174 	struct got_tree_entry *first_displayed_entry;
175 	struct got_tree_entry *selected_entry;
176 	int selected;
177 };
178 
179 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
180 
181 struct tog_tree_view_state {
182 	char *tree_label;
183 	struct got_tree_object *root;
184 	struct got_tree_object *tree;
185 	const struct got_tree_entries *entries;
186 	struct got_tree_entry *first_displayed_entry;
187 	struct got_tree_entry *last_displayed_entry;
188 	struct got_tree_entry *selected_entry;
189 	int nentries, ndisplayed, selected, show_ids;
190 	struct tog_parent_trees parents;
191 	struct got_object_id *commit_id;
192 	struct got_repository *repo;
193 };
194 
195 struct tog_view {
196 	TAILQ_ENTRY(tog_view) entry;
197 	WINDOW *window;
198 	PANEL *panel;
199 	int nlines, ncols, begin_y, begin_x;
200 	int lines, cols; /* copies of LINES and COLS */
201 	struct tog_view *parent;
202 
203 	/* type-specific state */
204 	enum tog_view_type type;
205 	union {
206 		struct tog_diff_view_state diff;
207 		struct tog_log_view_state log;
208 		struct tog_blame_view_state blame;
209 		struct tog_tree_view_state tree;
210 	} state;
211 
212 	const struct got_error *(*show)(struct tog_view *);
213 	const struct got_error *(*input)(struct tog_view **,
214 	    struct tog_view **, struct tog_view *, int);
215 	const struct got_error *(*close)(struct tog_view *);
216 };
217 TAILQ_HEAD(tog_view_list_head, tog_view);
218 
219 static const struct got_error *open_diff_view(struct tog_view *,
220     struct got_object *, struct got_object *, struct got_repository *);
221 static const struct got_error *show_diff_view(struct tog_view *);
222 static const struct got_error *input_diff_view(struct tog_view **,
223     struct tog_view **, struct tog_view *, int);
224 static const struct got_error* close_diff_view(struct tog_view *);
225 
226 static const struct got_error *open_log_view(struct tog_view *,
227     struct got_object_id *, struct got_repository *, const char *);
228 static const struct got_error * show_log_view(struct tog_view *);
229 static const struct got_error *input_log_view(struct tog_view **,
230     struct tog_view **, struct tog_view *, int);
231 static const struct got_error *close_log_view(struct tog_view *);
232 
233 static const struct got_error *open_blame_view(struct tog_view *, char *,
234     struct got_object_id *, struct got_repository *);
235 static const struct got_error *show_blame_view(struct tog_view *);
236 static const struct got_error *input_blame_view(struct tog_view **,
237     struct tog_view **, struct tog_view *, int);
238 static const struct got_error *close_blame_view(struct tog_view *);
239 
240 static const struct got_error *open_tree_view(struct tog_view *,
241     struct got_tree_object *, struct got_object_id *, struct got_repository *);
242 static const struct got_error *show_tree_view(struct tog_view *);
243 static const struct got_error *input_tree_view(struct tog_view **,
244     struct tog_view **, struct tog_view *, int);
245 static const struct got_error *close_tree_view(struct tog_view *);
246 
247 static const struct got_error *
248 view_close(struct tog_view *view)
249 {
250 	const struct got_error *err = NULL;
251 
252 	if (view->close)
253 		err = view->close(view);
254 	if (view->panel)
255 		del_panel(view->panel);
256 	if (view->window)
257 		delwin(view->window);
258 	free(view);
259 	return err;
260 }
261 
262 static struct tog_view *
263 view_open(int nlines, int ncols, int begin_y, int begin_x,
264     struct tog_view *parent, enum tog_view_type type)
265 {
266 	struct tog_view *view = calloc(1, sizeof(*view));
267 
268 	if (view == NULL)
269 		return NULL;
270 
271 	view->parent = parent;
272 	view->type = type;
273 	view->lines = LINES;
274 	view->cols = COLS;
275 	view->nlines = nlines ? nlines : LINES - begin_y;
276 	view->ncols = ncols ? ncols : COLS - begin_x;
277 	view->begin_y = begin_y;
278 	view->begin_x = begin_x;
279 	view->window = newwin(nlines, ncols, begin_y, begin_x);
280 	if (view->window == NULL) {
281 		view_close(view);
282 		return NULL;
283 	}
284 	view->panel = new_panel(view->window);
285 	if (view->panel == NULL) {
286 		view_close(view);
287 		return NULL;
288 	}
289 
290 	keypad(view->window, TRUE);
291 	return view;
292 }
293 
294 const struct got_error *
295 view_show(struct tog_view *view)
296 {
297 	const struct got_error *err;
298 
299 	err = view->show(view);
300 	if (err)
301 		return err;
302 	show_panel(view->panel);
303 	update_panels();
304 	doupdate();
305 
306 	return err;
307 }
308 
309 const struct got_error *
310 view_resize(struct tog_view *view)
311 {
312 	int nlines, ncols;
313 
314 	while (view) {
315 		if (view->lines > LINES)
316 			nlines = view->nlines - (view->lines - LINES);
317 		else
318 			nlines = view->nlines + (LINES - view->lines);
319 
320 		if (view->cols > COLS)
321 			ncols = view->ncols - (view->cols - COLS);
322 		else
323 			ncols = view->ncols + (COLS - view->cols);
324 
325 		if (wresize(view->window, nlines, ncols) == ERR)
326 			return got_error_from_errno();
327 		replace_panel(view->panel, view->window);
328 
329 		view->nlines = nlines;
330 		view->ncols = ncols;
331 		view->lines = LINES;
332 		view->cols = COLS;
333 
334 		view = view->parent;
335 	}
336 
337 	return NULL;
338 }
339 
340 static const struct got_error *
341 view_input(struct tog_view **new, struct tog_view **dead,
342     struct tog_view **focus, int *done, struct tog_view *view,
343     struct tog_view_list_head *views)
344 {
345 	const struct got_error *err = NULL;
346 	struct tog_view *next;
347 	int ch;
348 
349 	*new = NULL;
350 	*dead = NULL;
351 
352 	nodelay(stdscr, FALSE);
353 	ch = wgetch(view->window);
354 	nodelay(stdscr, TRUE);
355 	switch (ch) {
356 		case ERR:
357 			break;
358 		case '\t':
359 			next = TAILQ_NEXT(view, entry);
360 			if (next)
361 				*focus = next;
362 			else
363 				*focus = TAILQ_FIRST(views);
364 			break;
365 		case 'q':
366 			err = view->input(new, dead, view, ch);
367 			*dead = view;
368 			break;
369 		case 'Q':
370 			*done = 1;
371 			break;
372 		case KEY_RESIZE:
373 			err = view_resize(view);
374 			if (err)
375 				return err;
376 			err = view->input(new, dead, view, ch);
377 			break;
378 		default:
379 			err = view->input(new, dead, view, ch);
380 			break;
381 	}
382 
383 	return err;
384 }
385 
386 static const struct got_error *
387 view_loop(struct tog_view *view)
388 {
389 	const struct got_error *err = NULL;
390 	struct tog_view_list_head views;
391 	struct tog_view *new_view, *dead_view;
392 	int done = 0;
393 
394 	TAILQ_INIT(&views);
395 	TAILQ_INSERT_HEAD(&views, view, entry);
396 
397 	while (!TAILQ_EMPTY(&views) && !done) {
398 		err = view_show(view);
399 		if (err)
400 			break;
401 		err = view_input(&new_view, &dead_view, &view, &done,
402 		    view, &views);
403 		if (err)
404 			break;
405 		if (new_view) {
406 			TAILQ_INSERT_TAIL(&views, new_view, entry);
407 			view = new_view;
408 		}
409 		if (dead_view) {
410 			TAILQ_REMOVE(&views, dead_view, entry);
411 			TAILQ_FOREACH(view, &views, entry) {
412 				if (view->parent == dead_view)
413 					view->parent = NULL;
414 			}
415 			if (dead_view->parent)
416 				view = dead_view->parent;
417 			else
418 				view = TAILQ_LAST(&views, tog_view_list_head);
419 			err = view_close(dead_view);
420 			if (err)
421 				goto done;
422 		}
423 	}
424 done:
425 	while (!TAILQ_EMPTY(&views)) {
426 		view = TAILQ_FIRST(&views);
427 		TAILQ_REMOVE(&views, view, entry);
428 		view_close(view);
429 	}
430 	return err;
431 }
432 
433 __dead static void
434 usage_log(void)
435 {
436 	endwin();
437 	fprintf(stderr,
438 	    "usage: %s log [-c commit] [-r repository-path] [path]\n",
439 	    getprogname());
440 	exit(1);
441 }
442 
443 /* Create newly allocated wide-character string equivalent to a byte string. */
444 static const struct got_error *
445 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
446 {
447 	char *vis = NULL;
448 	const struct got_error *err = NULL;
449 
450 	*ws = NULL;
451 	*wlen = mbstowcs(NULL, s, 0);
452 	if (*wlen == (size_t)-1) {
453 		int vislen;
454 		if (errno != EILSEQ)
455 			return got_error_from_errno();
456 
457 		/* byte string invalid in current encoding; try to "fix" it */
458 		err = got_mbsavis(&vis, &vislen, s);
459 		if (err)
460 			return err;
461 		*wlen = mbstowcs(NULL, vis, 0);
462 		if (*wlen == (size_t)-1) {
463 			err = got_error_from_errno(); /* give up */
464 			goto done;
465 		}
466 	}
467 
468 	*ws = calloc(*wlen + 1, sizeof(*ws));
469 	if (*ws == NULL) {
470 		err = got_error_from_errno();
471 		goto done;
472 	}
473 
474 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
475 		err = got_error_from_errno();
476 done:
477 	free(vis);
478 	if (err) {
479 		free(*ws);
480 		*ws = NULL;
481 		*wlen = 0;
482 	}
483 	return err;
484 }
485 
486 /* Format a line for display, ensuring that it won't overflow a width limit. */
487 static const struct got_error *
488 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit)
489 {
490 	const struct got_error *err = NULL;
491 	int cols = 0;
492 	wchar_t *wline = NULL;
493 	size_t wlen;
494 	int i;
495 
496 	*wlinep = NULL;
497 	*widthp = 0;
498 
499 	err = mbs2ws(&wline, &wlen, line);
500 	if (err)
501 		return err;
502 
503 	i = 0;
504 	while (i < wlen && cols < wlimit) {
505 		int width = wcwidth(wline[i]);
506 		switch (width) {
507 		case 0:
508 			i++;
509 			break;
510 		case 1:
511 		case 2:
512 			if (cols + width <= wlimit) {
513 				cols += width;
514 				i++;
515 			}
516 			break;
517 		case -1:
518 			if (wline[i] == L'\t')
519 				cols += TABSIZE - ((cols + 1) % TABSIZE);
520 			i++;
521 			break;
522 		default:
523 			err = got_error_from_errno();
524 			goto done;
525 		}
526 	}
527 	wline[i] = L'\0';
528 	if (widthp)
529 		*widthp = cols;
530 done:
531 	if (err)
532 		free(wline);
533 	else
534 		*wlinep = wline;
535 	return err;
536 }
537 
538 static const struct got_error *
539 draw_commit(struct tog_view *view, struct got_commit_object *commit,
540     struct got_object_id *id)
541 {
542 	const struct got_error *err = NULL;
543 	char datebuf[10]; /* YY-MM-DD + SPACE + NUL */
544 	char *logmsg0 = NULL, *logmsg = NULL;
545 	char *author0 = NULL, *author = NULL;
546 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
547 	int author_width, logmsg_width;
548 	char *newline, *smallerthan;
549 	char *line = NULL;
550 	int col, limit;
551 	static const size_t date_display_cols = 9;
552 	static const size_t author_display_cols = 16;
553 	const int avail = view->ncols;
554 
555 	if (strftime(datebuf, sizeof(datebuf), "%g/%m/%d ",
556 	    &commit->tm_committer) >= sizeof(datebuf))
557 		return got_error(GOT_ERR_NO_SPACE);
558 
559 	if (avail < date_display_cols)
560 		limit = MIN(sizeof(datebuf) - 1, avail);
561 	else
562 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
563 	waddnstr(view->window, datebuf, limit);
564 	col = limit + 1;
565 	if (col > avail)
566 		goto done;
567 
568 	author0 = strdup(commit->author);
569 	if (author0 == NULL) {
570 		err = got_error_from_errno();
571 		goto done;
572 	}
573 	author = author0;
574 	smallerthan = strchr(author, '<');
575 	if (smallerthan)
576 		*smallerthan = '\0';
577 	else {
578 		char *at = strchr(author, '@');
579 		if (at)
580 			*at = '\0';
581 	}
582 	limit = avail - col;
583 	err = format_line(&wauthor, &author_width, author, limit);
584 	if (err)
585 		goto done;
586 	waddwstr(view->window, wauthor);
587 	col += author_width;
588 	while (col <= avail && author_width < author_display_cols + 1) {
589 		waddch(view->window, ' ');
590 		col++;
591 		author_width++;
592 	}
593 	if (col > avail)
594 		goto done;
595 
596 	logmsg0 = strdup(commit->logmsg);
597 	if (logmsg0 == NULL) {
598 		err = got_error_from_errno();
599 		goto done;
600 	}
601 	logmsg = logmsg0;
602 	while (*logmsg == '\n')
603 		logmsg++;
604 	newline = strchr(logmsg, '\n');
605 	if (newline)
606 		*newline = '\0';
607 	limit = avail - col;
608 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit);
609 	if (err)
610 		goto done;
611 	waddwstr(view->window, wlogmsg);
612 	col += logmsg_width;
613 	while (col <= avail) {
614 		waddch(view->window, ' ');
615 		col++;
616 	}
617 done:
618 	free(logmsg0);
619 	free(wlogmsg);
620 	free(author0);
621 	free(wauthor);
622 	free(line);
623 	return err;
624 }
625 
626 static struct commit_queue_entry *
627 alloc_commit_queue_entry(struct got_commit_object *commit,
628     struct got_object_id *id)
629 {
630 	struct commit_queue_entry *entry;
631 
632 	entry = calloc(1, sizeof(*entry));
633 	if (entry == NULL)
634 		return NULL;
635 
636 	entry->id = id;
637 	entry->commit = commit;
638 	return entry;
639 }
640 
641 static void
642 pop_commit(struct commit_queue *commits)
643 {
644 	struct commit_queue_entry *entry;
645 
646 	entry = TAILQ_FIRST(&commits->head);
647 	TAILQ_REMOVE(&commits->head, entry, entry);
648 	got_object_commit_close(entry->commit);
649 	commits->ncommits--;
650 	/* Don't free entry->id! It is owned by the commit graph. */
651 	free(entry);
652 }
653 
654 static void
655 free_commits(struct commit_queue *commits)
656 {
657 	while (!TAILQ_EMPTY(&commits->head))
658 		pop_commit(commits);
659 }
660 
661 static const struct got_error *
662 queue_commits(struct got_commit_graph *graph, struct commit_queue *commits,
663     struct got_object_id *start_id, int minqueue, int init,
664     struct got_repository *repo, const char *path)
665 {
666 	const struct got_error *err = NULL;
667 	struct got_object_id *id;
668 	struct commit_queue_entry *entry;
669 	int nfetched, nqueued = 0, found_obj = 0;
670 	int is_root_path = strcmp(path, "/") == 0;
671 
672 	err = got_commit_graph_iter_start(graph, start_id);
673 	if (err)
674 		return err;
675 
676 	entry = TAILQ_LAST(&commits->head, commit_queue_head);
677 	if (entry && got_object_id_cmp(entry->id, start_id) == 0) {
678 		int nfetched;
679 
680 		/* Start ID's commit is already on the queue; skip over it. */
681 		err = got_commit_graph_iter_next(&id, graph);
682 		if (err && err->code != GOT_ERR_ITER_NEED_MORE)
683 			return err;
684 
685 		err = got_commit_graph_fetch_commits(&nfetched, graph, 1, repo);
686 		if (err)
687 			return err;
688 	}
689 
690 	while (1) {
691 		struct got_commit_object *commit;
692 
693 		err = got_commit_graph_iter_next(&id, graph);
694 		if (err) {
695 			if (err->code != GOT_ERR_ITER_NEED_MORE)
696 				break;
697 			if (nqueued >= minqueue) {
698 				err = NULL;
699 				break;
700 			}
701 			err = got_commit_graph_fetch_commits(&nfetched,
702 			    graph, 1, repo);
703 			if (err)
704 				return err;
705 			continue;
706 		}
707 		if (id == NULL)
708 			break;
709 
710 		err = got_object_open_as_commit(&commit, repo, id);
711 		if (err)
712 			break;
713 
714 		if (!is_root_path) {
715 			struct got_object *obj;
716 			struct got_object_qid *pid;
717 			int changed = 0;
718 
719 			err = got_object_open_by_path(&obj, repo, id, path);
720 			if (err) {
721 				got_object_commit_close(commit);
722 				if (err->code == GOT_ERR_NO_OBJ &&
723 				    (found_obj || !init)) {
724 					/* History stops here. */
725 					err = got_error(GOT_ERR_ITER_COMPLETED);
726 				}
727 				break;
728 			}
729 			found_obj = 1;
730 
731 			pid = SIMPLEQ_FIRST(&commit->parent_ids);
732 			if (pid != NULL) {
733 				struct got_object *pobj;
734 				err = got_object_open_by_path(&pobj, repo,
735 				    pid->id, path);
736 				if (err) {
737 					if (err->code != GOT_ERR_NO_OBJ) {
738 						got_object_close(obj);
739 						got_object_commit_close(commit);
740 						break;
741 					}
742 					err = NULL;
743 					changed = 1;
744 				} else {
745 					struct got_object_id *id, *pid;
746 					id = got_object_get_id(obj);
747 					if (id == NULL) {
748 						err = got_error_from_errno();
749 						got_object_close(obj);
750 						got_object_close(pobj);
751 						break;
752 					}
753 					pid = got_object_get_id(pobj);
754 					if (pid == NULL) {
755 						err = got_error_from_errno();
756 						free(id);
757 						got_object_close(obj);
758 						got_object_close(pobj);
759 						break;
760 					}
761 					changed =
762 					    (got_object_id_cmp(id, pid) != 0);
763 					got_object_close(pobj);
764 					free(id);
765 					free(pid);
766 				}
767 			}
768 			got_object_close(obj);
769 			if (!changed) {
770 				got_object_commit_close(commit);
771 				continue;
772 			}
773 		}
774 
775 		entry = alloc_commit_queue_entry(commit, id);
776 		if (entry == NULL) {
777 			err = got_error_from_errno();
778 			break;
779 		}
780 		TAILQ_INSERT_TAIL(&commits->head, entry, entry);
781 		nqueued++;
782 		commits->ncommits++;
783 	}
784 
785 	return err;
786 }
787 
788 static const struct got_error *
789 fetch_next_commit(struct commit_queue_entry **pentry,
790     struct commit_queue_entry *entry, struct commit_queue *commits,
791     struct got_commit_graph *graph, struct got_repository *repo,
792     const char *path)
793 {
794 	const struct got_error *err = NULL;
795 
796 	*pentry = NULL;
797 
798 	err = queue_commits(graph, commits, entry->id, 1, 0, repo, path);
799 	if (err)
800 		return err;
801 
802 	/* Next entry to display should now be available. */
803 	*pentry = TAILQ_NEXT(entry, entry);
804 	if (*pentry == NULL)
805 		return got_error(GOT_ERR_NO_OBJ);
806 
807 	return NULL;
808 }
809 
810 static const struct got_error *
811 get_head_commit_id(struct got_object_id **head_id, struct got_repository *repo)
812 {
813 	const struct got_error *err = NULL;
814 	struct got_reference *head_ref;
815 
816 	*head_id = NULL;
817 
818 	err = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
819 	if (err)
820 		return err;
821 
822 	err = got_ref_resolve(head_id, repo, head_ref);
823 	got_ref_close(head_ref);
824 	if (err) {
825 		*head_id = NULL;
826 		return err;
827 	}
828 
829 	return NULL;
830 }
831 
832 static const struct got_error *
833 draw_commits(struct tog_view *view, struct commit_queue_entry **last,
834     struct commit_queue_entry **selected, struct commit_queue_entry *first,
835     struct commit_queue *commits, int selected_idx, int limit,
836     struct got_commit_graph *graph, struct got_repository *repo,
837     const char *path)
838 {
839 	const struct got_error *err = NULL;
840 	struct commit_queue_entry *entry;
841 	int ncommits, width;
842 	char *id_str, *header;
843 	wchar_t *wline;
844 
845 	entry = first;
846 	ncommits = 0;
847 	while (entry) {
848 		if (ncommits == selected_idx) {
849 			*selected = entry;
850 			break;
851 		}
852 		entry = TAILQ_NEXT(entry, entry);
853 		ncommits++;
854 	}
855 
856 	err = got_object_id_str(&id_str, (*selected)->id);
857 	if (err)
858 		return err;
859 
860 	if (path && strcmp(path, "/") != 0) {
861 		if (asprintf(&header, "commit: %s [%s]", id_str, path) == -1) {
862 			err = got_error_from_errno();
863 			free(id_str);
864 			return err;
865 		}
866 	} else if (asprintf(&header, "commit: %s", id_str) == -1) {
867 		err = got_error_from_errno();
868 		free(id_str);
869 		return err;
870 	}
871 	free(id_str);
872 	err = format_line(&wline, &width, header, view->ncols);
873 	if (err) {
874 		free(header);
875 		return err;
876 	}
877 	free(header);
878 
879 	werase(view->window);
880 
881 	waddwstr(view->window, wline);
882 	if (width < view->ncols)
883 		waddch(view->window, '\n');
884 	free(wline);
885 	if (limit <= 1)
886 		return NULL;
887 
888 	entry = first;
889 	*last = first;
890 	ncommits = 0;
891 	while (entry) {
892 		if (ncommits >= limit - 1)
893 			break;
894 		if (ncommits == selected_idx)
895 			wstandout(view->window);
896 		err = draw_commit(view, entry->commit, entry->id);
897 		if (ncommits == selected_idx)
898 			wstandend(view->window);
899 		if (err)
900 			break;
901 		ncommits++;
902 		*last = entry;
903 		if (entry == TAILQ_LAST(&commits->head, commit_queue_head)) {
904 			err = queue_commits(graph, commits, entry->id, 1,
905 			    0, repo, path);
906 			if (err) {
907 				if (err->code != GOT_ERR_ITER_COMPLETED)
908 					return err;
909 				err = NULL;
910 			}
911 		}
912 		entry = TAILQ_NEXT(entry, entry);
913 	}
914 
915 	update_panels();
916 
917 	return err;
918 }
919 
920 static void
921 scroll_up(struct commit_queue_entry **first_displayed_entry, int maxscroll,
922     struct commit_queue *commits)
923 {
924 	struct commit_queue_entry *entry;
925 	int nscrolled = 0;
926 
927 	entry = TAILQ_FIRST(&commits->head);
928 	if (*first_displayed_entry == entry)
929 		return;
930 
931 	entry = *first_displayed_entry;
932 	while (entry && nscrolled < maxscroll) {
933 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
934 		if (entry) {
935 			*first_displayed_entry = entry;
936 			nscrolled++;
937 		}
938 	}
939 }
940 
941 static const struct got_error *
942 scroll_down(struct commit_queue_entry **first_displayed_entry, int maxscroll,
943     struct commit_queue_entry *last_displayed_entry,
944     struct commit_queue *commits, struct got_commit_graph *graph,
945     struct got_repository *repo, const char *path)
946 {
947 	const struct got_error *err = NULL;
948 	struct commit_queue_entry *pentry;
949 	int nscrolled = 0;
950 
951 	do {
952 		pentry = TAILQ_NEXT(last_displayed_entry, entry);
953 		if (pentry == NULL) {
954 			err = fetch_next_commit(&pentry, last_displayed_entry,
955 			    commits, graph, repo, path);
956 			if (err || pentry == NULL)
957 				break;
958 		}
959 		last_displayed_entry = pentry;
960 
961 		pentry = TAILQ_NEXT(*first_displayed_entry, entry);
962 		if (pentry == NULL)
963 			break;
964 		*first_displayed_entry = pentry;
965 	} while (++nscrolled < maxscroll);
966 
967 	return err;
968 }
969 
970 static const struct got_error *
971 show_commit(struct tog_view **new_view, struct tog_view *parent_view,
972     struct commit_queue_entry *entry, struct got_repository *repo)
973 {
974 	const struct got_error *err;
975 	struct got_object *obj1 = NULL, *obj2 = NULL;
976 	struct got_object_qid *parent_id;
977 	struct tog_view *diff_view;
978 
979 	err = got_object_open(&obj2, repo, entry->id);
980 	if (err)
981 		return err;
982 
983 	parent_id = SIMPLEQ_FIRST(&entry->commit->parent_ids);
984 	if (parent_id) {
985 		err = got_object_open(&obj1, repo, parent_id->id);
986 		if (err)
987 			goto done;
988 	}
989 
990 	diff_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_DIFF);
991 	if (diff_view == NULL) {
992 		err = got_error_from_errno();
993 		goto done;
994 	}
995 
996 	err = open_diff_view(diff_view, obj1, obj2, repo);
997 	if (err == NULL)
998 		*new_view = diff_view;
999 done:
1000 	if (obj1)
1001 		got_object_close(obj1);
1002 	if (obj2)
1003 		got_object_close(obj2);
1004 	return err;
1005 }
1006 
1007 static const struct got_error *
1008 browse_commit(struct tog_view **new_view, struct tog_view *parent_view,
1009     struct commit_queue_entry *entry, struct got_repository *repo)
1010 {
1011 	const struct got_error *err = NULL;
1012 	struct got_tree_object *tree;
1013 	struct tog_view *tree_view;
1014 
1015 	err = got_object_open_as_tree(&tree, repo, entry->commit->tree_id);
1016 	if (err)
1017 		return err;
1018 
1019 	tree_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_TREE);
1020 	if (tree_view == NULL)
1021 		return got_error_from_errno();
1022 
1023 	err = open_tree_view(tree_view, tree, entry->id, repo);
1024 	if (err)
1025 		got_object_tree_close(tree);
1026 	else
1027 		*new_view = tree_view;
1028 	return err;
1029 }
1030 
1031 static const struct got_error *
1032 open_log_view(struct tog_view *view, struct got_object_id *start_id,
1033     struct got_repository *repo, const char *path)
1034 {
1035 	const struct got_error *err = NULL;
1036 	struct got_object_id *head_id = NULL;
1037 	int nfetched;
1038 	struct tog_log_view_state *s = &view->state.log;
1039 
1040 	err = got_repo_map_path(&s->in_repo_path, repo, path);
1041 	if (err != NULL)
1042 		goto done;
1043 
1044 	err = get_head_commit_id(&head_id, repo);
1045 	if (err)
1046 		return err;
1047 
1048 	/* The graph contains all commits. */
1049 	err = got_commit_graph_open(&s->graph, head_id, 0, repo);
1050 	if (err)
1051 		goto done;
1052 	/* The commit queue contains a subset of commits filtered by path. */
1053 	TAILQ_INIT(&s->commits.head);
1054 	s->commits.ncommits = 0;
1055 
1056 	/* Populate commit graph with a sufficient number of commits. */
1057 	err = got_commit_graph_fetch_commits_up_to(&nfetched, s->graph,
1058 	    start_id, repo);
1059 	if (err)
1060 		goto done;
1061 
1062 	/*
1063 	 * Open the initial batch of commits, sorted in commit graph order.
1064 	 * We keep all commits open throughout the lifetime of the log view
1065 	 * in order to avoid having to re-fetch commits from disk while
1066 	 * updating the display.
1067 	 */
1068 	err = queue_commits(s->graph, &s->commits, start_id, view->nlines, 1,
1069 	    repo, s->in_repo_path);
1070 	if (err) {
1071 		if (err->code != GOT_ERR_ITER_COMPLETED)
1072 			goto done;
1073 		err = NULL;
1074 	}
1075 
1076 	s->first_displayed_entry =
1077 	    TAILQ_FIRST(&s->commits.head);
1078 	s->selected_entry = s->first_displayed_entry;
1079 	s->repo = repo;
1080 
1081 	view->show = show_log_view;
1082 	view->input = input_log_view;
1083 	view->close = close_log_view;
1084 done:
1085 	free(head_id);
1086 	return err;
1087 }
1088 
1089 static const struct got_error *
1090 close_log_view(struct tog_view *view)
1091 {
1092 	struct tog_log_view_state *s = &view->state.log;
1093 
1094 	if (s->graph)
1095 		got_commit_graph_close(s->graph);
1096 	free_commits(&s->commits);
1097 	free(s->in_repo_path);
1098 	return NULL;
1099 }
1100 
1101 static const struct got_error *
1102 show_log_view(struct tog_view *view)
1103 {
1104 	struct tog_log_view_state *s = &view->state.log;
1105 
1106 	return draw_commits(view, &s->last_displayed_entry,
1107 	    &s->selected_entry, s->first_displayed_entry,
1108 	    &s->commits, s->selected, view->nlines, s->graph,
1109 	    s->repo, s->in_repo_path);
1110 }
1111 
1112 static const struct got_error *
1113 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
1114     struct tog_view *view, int ch)
1115 {
1116 	const struct got_error *err = NULL;
1117 	struct tog_log_view_state *s = &view->state.log;
1118 
1119 	switch (ch) {
1120 		case 'k':
1121 		case KEY_UP:
1122 			if (s->selected > 0)
1123 				s->selected--;
1124 			if (s->selected > 0)
1125 				break;
1126 			scroll_up(&s->first_displayed_entry, 1,
1127 			    &s->commits);
1128 			break;
1129 		case KEY_PPAGE:
1130 			if (TAILQ_FIRST(&s->commits.head) ==
1131 			    s->first_displayed_entry) {
1132 				s->selected = 0;
1133 				break;
1134 			}
1135 			scroll_up(&s->first_displayed_entry,
1136 			    view->nlines, &s->commits);
1137 			break;
1138 		case 'j':
1139 		case KEY_DOWN:
1140 			if (s->selected < MIN(view->nlines - 2,
1141 			    s->commits.ncommits - 1)) {
1142 				s->selected++;
1143 				break;
1144 			}
1145 			err = scroll_down(&s->first_displayed_entry, 1,
1146 			    s->last_displayed_entry, &s->commits,
1147 			    s->graph, s->repo, s->in_repo_path);
1148 			if (err) {
1149 				if (err->code != GOT_ERR_ITER_COMPLETED)
1150 					break;
1151 				err = NULL;
1152 			}
1153 			break;
1154 		case KEY_NPAGE: {
1155 			struct commit_queue_entry *first;
1156 			first = s->first_displayed_entry;
1157 			err = scroll_down(&s->first_displayed_entry,
1158 			    view->nlines, s->last_displayed_entry,
1159 			    &s->commits, s->graph, s->repo,
1160 			    s->in_repo_path);
1161 			if (err == NULL)
1162 				break;
1163 			if (err->code != GOT_ERR_ITER_COMPLETED)
1164 				break;
1165 			if (first == s->first_displayed_entry &&
1166 			    s->selected < MIN(view->nlines - 2,
1167 			    s->commits.ncommits - 1)) {
1168 				/* can't scroll further down */
1169 				s->selected = MIN(view->nlines - 2,
1170 				    s->commits.ncommits - 1);
1171 			}
1172 			err = NULL;
1173 			break;
1174 		}
1175 		case KEY_RESIZE:
1176 			if (s->selected > view->nlines - 2)
1177 				s->selected = view->nlines - 2;
1178 			if (s->selected > s->commits.ncommits - 1)
1179 				s->selected = s->commits.ncommits - 1;
1180 			break;
1181 		case KEY_ENTER:
1182 		case '\r':
1183 			err = show_commit(new_view, view, s->selected_entry,
1184 			    s->repo);
1185 			break;
1186 		case 't':
1187 			err = browse_commit(new_view, view, s->selected_entry,
1188 			    s->repo);
1189 			break;
1190 		default:
1191 			break;
1192 	}
1193 
1194 	return err;
1195 }
1196 
1197 static const struct got_error *
1198 cmd_log(int argc, char *argv[])
1199 {
1200 	const struct got_error *error;
1201 	struct got_repository *repo = NULL;
1202 	struct got_object_id *start_id = NULL;
1203 	char *path = NULL, *repo_path = NULL, *cwd = NULL;
1204 	char *start_commit = NULL;
1205 	int ch;
1206 	struct tog_view *view;
1207 
1208 #ifndef PROFILE
1209 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
1210 		err(1, "pledge");
1211 #endif
1212 
1213 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
1214 		switch (ch) {
1215 		case 'c':
1216 			start_commit = optarg;
1217 			break;
1218 		case 'r':
1219 			repo_path = realpath(optarg, NULL);
1220 			if (repo_path == NULL)
1221 				err(1, "-r option");
1222 			break;
1223 		default:
1224 			usage();
1225 			/* NOTREACHED */
1226 		}
1227 	}
1228 
1229 	argc -= optind;
1230 	argv += optind;
1231 
1232 	if (argc == 0)
1233 		path = strdup("");
1234 	else if (argc == 1)
1235 		path = strdup(argv[0]);
1236 	else
1237 		usage_log();
1238 	if (path == NULL)
1239 		return got_error_from_errno();
1240 
1241 	cwd = getcwd(NULL, 0);
1242 	if (cwd == NULL) {
1243 		error = got_error_from_errno();
1244 		goto done;
1245 	}
1246 	if (repo_path == NULL) {
1247 		repo_path = strdup(cwd);
1248 		if (repo_path == NULL) {
1249 			error = got_error_from_errno();
1250 			goto done;
1251 		}
1252 	}
1253 
1254 	error = got_repo_open(&repo, repo_path);
1255 	if (error != NULL)
1256 		goto done;
1257 
1258 	if (start_commit == NULL) {
1259 		error = get_head_commit_id(&start_id, repo);
1260 		if (error != NULL)
1261 			goto done;
1262 	} else {
1263 		struct got_object *obj;
1264 		error = got_object_open_by_id_str(&obj, repo, start_commit);
1265 		if (error == NULL) {
1266 			start_id = got_object_get_id(obj);
1267 			if (start_id == NULL)
1268 				error = got_error_from_errno();
1269 				goto done;
1270 		}
1271 	}
1272 	if (error != NULL)
1273 		goto done;
1274 
1275 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_LOG);
1276 	if (view == NULL) {
1277 		error = got_error_from_errno();
1278 		goto done;
1279 	}
1280 	error = open_log_view(view, start_id, repo, path);
1281 	if (error)
1282 		goto done;
1283 	error = view_loop(view);
1284 done:
1285 	free(repo_path);
1286 	free(cwd);
1287 	free(path);
1288 	free(start_id);
1289 	if (repo)
1290 		got_repo_close(repo);
1291 	return error;
1292 }
1293 
1294 __dead static void
1295 usage_diff(void)
1296 {
1297 	endwin();
1298 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
1299 	    getprogname());
1300 	exit(1);
1301 }
1302 
1303 static char *
1304 parse_next_line(FILE *f, size_t *len)
1305 {
1306 	char *line;
1307 	size_t linelen;
1308 	size_t lineno;
1309 	const char delim[3] = { '\0', '\0', '\0'};
1310 
1311 	line = fparseln(f, &linelen, &lineno, delim, 0);
1312 	if (len)
1313 		*len = linelen;
1314 	return line;
1315 }
1316 
1317 static const struct got_error *
1318 draw_file(struct tog_view *view, FILE *f, int *first_displayed_line,
1319     int *last_displayed_line, int *eof, int max_lines)
1320 {
1321 	const struct got_error *err;
1322 	int nlines = 0, nprinted = 0;
1323 	char *line;
1324 	size_t len;
1325 	wchar_t *wline;
1326 	int width;
1327 
1328 	rewind(f);
1329 	werase(view->window);
1330 
1331 	*eof = 0;
1332 	while (nprinted < max_lines) {
1333 		line = parse_next_line(f, &len);
1334 		if (line == NULL) {
1335 			*eof = 1;
1336 			break;
1337 		}
1338 		if (++nlines < *first_displayed_line) {
1339 			free(line);
1340 			continue;
1341 		}
1342 
1343 		err = format_line(&wline, &width, line, view->ncols);
1344 		if (err) {
1345 			free(line);
1346 			free(wline);
1347 			return err;
1348 		}
1349 		waddwstr(view->window, wline);
1350 		if (width < view->ncols)
1351 			waddch(view->window, '\n');
1352 		if (++nprinted == 1)
1353 			*first_displayed_line = nlines;
1354 		free(line);
1355 		free(wline);
1356 		wline = NULL;
1357 	}
1358 	*last_displayed_line = nlines;
1359 
1360 	update_panels();
1361 
1362 	return NULL;
1363 }
1364 
1365 static const struct got_error *
1366 open_diff_view(struct tog_view *view, struct got_object *obj1,
1367     struct got_object *obj2, struct got_repository *repo)
1368 {
1369 	const struct got_error *err;
1370 	FILE *f;
1371 
1372 	if (obj1 != NULL && obj2 != NULL &&
1373 	    got_object_get_type(obj1) != got_object_get_type(obj2))
1374 		return got_error(GOT_ERR_OBJ_TYPE);
1375 
1376 	f = got_opentemp();
1377 	if (f == NULL)
1378 		return got_error_from_errno();
1379 
1380 	switch (got_object_get_type(obj1 ? obj1 : obj2)) {
1381 	case GOT_OBJ_TYPE_BLOB:
1382 		err = got_diff_objects_as_blobs(obj1, obj2, repo, f);
1383 		break;
1384 	case GOT_OBJ_TYPE_TREE:
1385 		err = got_diff_objects_as_trees(obj1, obj2, repo, f);
1386 		break;
1387 	case GOT_OBJ_TYPE_COMMIT:
1388 		err = got_diff_objects_as_commits(obj1, obj2, repo, f);
1389 		break;
1390 	default:
1391 		return got_error(GOT_ERR_OBJ_TYPE);
1392 	}
1393 
1394 	fflush(f);
1395 
1396 	view->state.diff.f = f;
1397 	view->state.diff.first_displayed_line = 1;
1398 	view->state.diff.last_displayed_line = view->nlines;
1399 
1400 	view->show = show_diff_view;
1401 	view->input = input_diff_view;
1402 	view->close = close_diff_view;
1403 
1404 	return NULL;
1405 }
1406 
1407 static const struct got_error *
1408 close_diff_view(struct tog_view *view)
1409 {
1410 	const struct got_error *err = NULL;
1411 
1412 	if (view->state.diff.f && fclose(view->state.diff.f) == EOF)
1413 		err = got_error_from_errno();
1414 
1415 	return err;
1416 }
1417 
1418 static const struct got_error *
1419 show_diff_view(struct tog_view *view)
1420 {
1421 	struct tog_diff_view_state *s = &view->state.diff;
1422 
1423 	return draw_file(view, s->f, &s->first_displayed_line,
1424 	    &s->last_displayed_line, &s->eof, view->nlines);
1425 }
1426 
1427 static const struct got_error *
1428 input_diff_view(struct tog_view **new, struct tog_view **dead,
1429     struct tog_view *view, int ch)
1430 {
1431 	struct tog_diff_view_state *s = &view->state.diff;
1432 	int i;
1433 
1434 	switch (ch) {
1435 		case 'k':
1436 		case KEY_UP:
1437 			if (s->first_displayed_line > 1)
1438 				s->first_displayed_line--;
1439 			break;
1440 		case KEY_PPAGE:
1441 		case KEY_BACKSPACE:
1442 			i = 0;
1443 			while (i++ < view->nlines - 1 &&
1444 			    s->first_displayed_line > 1)
1445 				s->first_displayed_line--;
1446 			break;
1447 		case 'j':
1448 		case KEY_DOWN:
1449 			if (!s->eof)
1450 				s->first_displayed_line++;
1451 			break;
1452 		case KEY_NPAGE:
1453 		case ' ':
1454 			i = 0;
1455 			while (!s->eof && i++ < view->nlines - 1) {
1456 				char *line;
1457 				line = parse_next_line(s->f, NULL);
1458 				s->first_displayed_line++;
1459 				if (line == NULL)
1460 					break;
1461 			}
1462 			break;
1463 		default:
1464 			break;
1465 	}
1466 
1467 	return NULL;
1468 }
1469 
1470 static const struct got_error *
1471 cmd_diff(int argc, char *argv[])
1472 {
1473 	const struct got_error *error = NULL;
1474 	struct got_repository *repo = NULL;
1475 	struct got_object *obj1 = NULL, *obj2 = NULL;
1476 	char *repo_path = NULL;
1477 	char *obj_id_str1 = NULL, *obj_id_str2 = NULL;
1478 	int ch;
1479 	struct tog_view *view;
1480 
1481 #ifndef PROFILE
1482 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
1483 		err(1, "pledge");
1484 #endif
1485 
1486 	while ((ch = getopt(argc, argv, "")) != -1) {
1487 		switch (ch) {
1488 		default:
1489 			usage();
1490 			/* NOTREACHED */
1491 		}
1492 	}
1493 
1494 	argc -= optind;
1495 	argv += optind;
1496 
1497 	if (argc == 0) {
1498 		usage_diff(); /* TODO show local worktree changes */
1499 	} else if (argc == 2) {
1500 		repo_path = getcwd(NULL, 0);
1501 		if (repo_path == NULL)
1502 			return got_error_from_errno();
1503 		obj_id_str1 = argv[0];
1504 		obj_id_str2 = argv[1];
1505 	} else if (argc == 3) {
1506 		repo_path = realpath(argv[0], NULL);
1507 		if (repo_path == NULL)
1508 			return got_error_from_errno();
1509 		obj_id_str1 = argv[1];
1510 		obj_id_str2 = argv[2];
1511 	} else
1512 		usage_diff();
1513 
1514 	error = got_repo_open(&repo, repo_path);
1515 	free(repo_path);
1516 	if (error)
1517 		goto done;
1518 
1519 	error = got_object_open_by_id_str(&obj1, repo, obj_id_str1);
1520 	if (error)
1521 		goto done;
1522 
1523 	error = got_object_open_by_id_str(&obj2, repo, obj_id_str2);
1524 	if (error)
1525 		goto done;
1526 
1527 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_DIFF);
1528 	if (view == NULL) {
1529 		error = got_error_from_errno();
1530 		goto done;
1531 	}
1532 	error = open_diff_view(view, obj1, obj2, repo);
1533 	if (error)
1534 		goto done;
1535 	error = view_loop(view);
1536 done:
1537 	got_repo_close(repo);
1538 	if (obj1)
1539 		got_object_close(obj1);
1540 	if (obj2)
1541 		got_object_close(obj2);
1542 	return error;
1543 }
1544 
1545 __dead static void
1546 usage_blame(void)
1547 {
1548 	endwin();
1549 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
1550 	    getprogname());
1551 	exit(1);
1552 }
1553 
1554 struct tog_blame_line {
1555 	int annotated;
1556 	struct got_object_id *id;
1557 };
1558 
1559 static const struct got_error *
1560 draw_blame(struct tog_view *view, struct got_object_id *id, FILE *f,
1561     const char *path, struct tog_blame_line *lines, int nlines,
1562     int blame_complete, int selected_line, int *first_displayed_line,
1563     int *last_displayed_line, int *eof, int max_lines)
1564 {
1565 	const struct got_error *err;
1566 	int lineno = 0, nprinted = 0;
1567 	char *line;
1568 	size_t len;
1569 	wchar_t *wline;
1570 	int width, wlimit;
1571 	struct tog_blame_line *blame_line;
1572 	struct got_object_id *prev_id = NULL;
1573 	char *id_str;
1574 
1575 	err = got_object_id_str(&id_str, id);
1576 	if (err)
1577 		return err;
1578 
1579 	rewind(f);
1580 	werase(view->window);
1581 
1582 	if (asprintf(&line, "commit: %s", id_str) == -1) {
1583 		err = got_error_from_errno();
1584 		free(id_str);
1585 		return err;
1586 	}
1587 
1588 	err = format_line(&wline, &width, line, view->ncols);
1589 	free(line);
1590 	line = NULL;
1591 	waddwstr(view->window, wline);
1592 	free(wline);
1593 	wline = NULL;
1594 	if (width < view->ncols)
1595 		waddch(view->window, '\n');
1596 
1597 	if (asprintf(&line, "[%d/%d] %s%s",
1598 	    *first_displayed_line - 1 + selected_line, nlines,
1599 	    blame_complete ? "" : "annotating ", path) == -1) {
1600 		free(id_str);
1601 		return got_error_from_errno();
1602 	}
1603 	free(id_str);
1604 	err = format_line(&wline, &width, line, view->ncols);
1605 	free(line);
1606 	line = NULL;
1607 	if (err)
1608 		return err;
1609 	waddwstr(view->window, wline);
1610 	free(wline);
1611 	wline = NULL;
1612 	if (width < view->ncols)
1613 		waddch(view->window, '\n');
1614 
1615 	*eof = 0;
1616 	while (nprinted < max_lines - 2) {
1617 		line = parse_next_line(f, &len);
1618 		if (line == NULL) {
1619 			*eof = 1;
1620 			break;
1621 		}
1622 		if (++lineno < *first_displayed_line) {
1623 			free(line);
1624 			continue;
1625 		}
1626 
1627 		wlimit = view->ncols < 9 ? 0 : view->ncols - 9;
1628 		err = format_line(&wline, &width, line, wlimit);
1629 		if (err) {
1630 			free(line);
1631 			return err;
1632 		}
1633 
1634 		if (nprinted == selected_line - 1)
1635 			wstandout(view->window);
1636 
1637 		blame_line = &lines[lineno - 1];
1638 		if (blame_line->annotated && prev_id &&
1639 		    got_object_id_cmp(prev_id, blame_line->id) == 0)
1640 			waddstr(view->window, "         ");
1641 		else if (blame_line->annotated) {
1642 			char *id_str;
1643 			err = got_object_id_str(&id_str, blame_line->id);
1644 			if (err) {
1645 				free(line);
1646 				free(wline);
1647 				return err;
1648 			}
1649 			wprintw(view->window, "%.8s ", id_str);
1650 			free(id_str);
1651 			prev_id = blame_line->id;
1652 		} else {
1653 			waddstr(view->window, "........ ");
1654 			prev_id = NULL;
1655 		}
1656 
1657 		waddwstr(view->window, wline);
1658 		while (width < wlimit) {
1659 			waddch(view->window, ' ');
1660 			width++;
1661 		}
1662 		if (nprinted == selected_line - 1)
1663 			wstandend(view->window);
1664 		if (++nprinted == 1)
1665 			*first_displayed_line = lineno;
1666 		free(line);
1667 		free(wline);
1668 		wline = NULL;
1669 	}
1670 	*last_displayed_line = lineno;
1671 
1672 	update_panels();
1673 
1674 	return NULL;
1675 }
1676 
1677 static const struct got_error *
1678 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
1679 {
1680 	const struct got_error *err = NULL;
1681 	struct tog_blame_cb_args *a = arg;
1682 	struct tog_blame_line *line;
1683 
1684 	if (nlines != a->nlines ||
1685 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1686 		return got_error(GOT_ERR_RANGE);
1687 
1688 	if (pthread_mutex_lock(a->mutex) != 0)
1689 		return got_error_from_errno();
1690 
1691 	if (*a->quit) {	/* user has quit the blame view */
1692 		err = got_error(GOT_ERR_ITER_COMPLETED);
1693 		goto done;
1694 	}
1695 
1696 	if (lineno == -1)
1697 		goto done; /* no change in this commit */
1698 
1699 	line = &a->lines[lineno - 1];
1700 	if (line->annotated)
1701 		goto done;
1702 
1703 	line->id = got_object_id_dup(id);
1704 	if (line->id == NULL) {
1705 		err = got_error_from_errno();
1706 		goto done;
1707 	}
1708 	line->annotated = 1;
1709 
1710 	err = draw_blame(a->view, a->commit_id, a->f, a->path,
1711 	    a->lines, a->nlines, 0, *a->selected_line, a->first_displayed_line,
1712 	    a->last_displayed_line, a->eof, a->view->nlines);
1713 done:
1714 	if (pthread_mutex_unlock(a->mutex) != 0)
1715 		return got_error_from_errno();
1716 	return err;
1717 }
1718 
1719 static void *
1720 blame_thread(void *arg)
1721 {
1722 	const struct got_error *err;
1723 	struct tog_blame_thread_args *ta = arg;
1724 	struct tog_blame_cb_args *a = ta->cb_args;
1725 
1726 	err = got_blame_incremental(ta->path, a->commit_id, ta->repo,
1727 	    blame_cb, ta->cb_args);
1728 
1729 	if (pthread_mutex_lock(a->mutex) != 0)
1730 		return (void *)got_error_from_errno();
1731 
1732 	got_repo_close(ta->repo);
1733 	ta->repo = NULL;
1734 	*ta->complete = 1;
1735 	if (!err)
1736 		err = draw_blame(a->view, a->commit_id, a->f, a->path,
1737 		    a->lines, a->nlines, 1, *a->selected_line,
1738 		    a->first_displayed_line, a->last_displayed_line, a->eof,
1739 		    a->view->nlines);
1740 
1741 	if (pthread_mutex_unlock(a->mutex) != 0 && err == NULL)
1742 		err = got_error_from_errno();
1743 
1744 	return (void *)err;
1745 }
1746 
1747 static struct got_object_id *
1748 get_selected_commit_id(struct tog_blame_line *lines,
1749     int first_displayed_line, int selected_line)
1750 {
1751 	struct tog_blame_line *line;
1752 
1753 	line = &lines[first_displayed_line - 1 + selected_line - 1];
1754 	if (!line->annotated)
1755 		return NULL;
1756 
1757 	return line->id;
1758 }
1759 
1760 static const struct got_error *
1761 open_selected_commit(struct got_object **pobj, struct got_object **obj,
1762     struct tog_blame_line *lines, int first_displayed_line,
1763     int selected_line, struct got_repository *repo)
1764 {
1765 	const struct got_error *err = NULL;
1766 	struct got_commit_object *commit = NULL;
1767 	struct got_object_id *selected_id;
1768 	struct got_object_qid *pid;
1769 
1770 	*pobj = NULL;
1771 	*obj = NULL;
1772 
1773 	selected_id = get_selected_commit_id(lines,
1774 	    first_displayed_line, selected_line);
1775 	if (selected_id == NULL)
1776 		return NULL;
1777 
1778 	err = got_object_open(obj, repo, selected_id);
1779 	if (err)
1780 		goto done;
1781 
1782 	err = got_object_commit_open(&commit, repo, *obj);
1783 	if (err)
1784 		goto done;
1785 
1786 	pid = SIMPLEQ_FIRST(&commit->parent_ids);
1787 	if (pid) {
1788 		err = got_object_open(pobj, repo, pid->id);
1789 		if (err)
1790 			goto done;
1791 	}
1792 done:
1793 	if (commit)
1794 		got_object_commit_close(commit);
1795 	return err;
1796 }
1797 
1798 static const struct got_error *
1799 stop_blame(struct tog_blame *blame)
1800 {
1801 	const struct got_error *err = NULL;
1802 	int i;
1803 
1804 	if (blame->thread) {
1805 		if (pthread_join(blame->thread, (void **)&err) != 0)
1806 			err = got_error_from_errno();
1807 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
1808 			err = NULL;
1809 		blame->thread = NULL;
1810 	}
1811 	if (blame->thread_args.repo) {
1812 		got_repo_close(blame->thread_args.repo);
1813 		blame->thread_args.repo = NULL;
1814 	}
1815 	if (blame->f) {
1816 		fclose(blame->f);
1817 		blame->f = NULL;
1818 	}
1819 	for (i = 0; i < blame->nlines; i++)
1820 		free(blame->lines[i].id);
1821 	free(blame->lines);
1822 	blame->lines = NULL;
1823 	free(blame->cb_args.commit_id);
1824 	blame->cb_args.commit_id = NULL;
1825 
1826 	return err;
1827 }
1828 
1829 static const struct got_error *
1830 run_blame(struct tog_blame *blame, pthread_mutex_t *mutex,
1831     struct tog_view *view, int *blame_complete,
1832     int *first_displayed_line, int *last_displayed_line,
1833     int *selected_line, int *done, int *eof, const char *path,
1834     struct got_object_id *commit_id,
1835     struct got_repository *repo)
1836 {
1837 	const struct got_error *err = NULL;
1838 	struct got_blob_object *blob = NULL;
1839 	struct got_repository *thread_repo = NULL;
1840 	struct got_object *obj;
1841 
1842 	err = got_object_open_by_path(&obj, repo, commit_id, path);
1843 	if (err)
1844 		goto done;
1845 	if (got_object_get_type(obj) != GOT_OBJ_TYPE_BLOB) {
1846 		err = got_error(GOT_ERR_OBJ_TYPE);
1847 		goto done;
1848 	}
1849 
1850 	err = got_object_blob_open(&blob, repo, obj, 8192);
1851 	if (err)
1852 		goto done;
1853 	blame->f = got_opentemp();
1854 	if (blame->f == NULL) {
1855 		err = got_error_from_errno();
1856 		goto done;
1857 	}
1858 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
1859 	    blame->f, blob);
1860 	if (err)
1861 		goto done;
1862 
1863 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
1864 	if (blame->lines == NULL) {
1865 		err = got_error_from_errno();
1866 		goto done;
1867 	}
1868 
1869 	err = got_repo_open(&thread_repo, got_repo_get_path(repo));
1870 	if (err)
1871 		goto done;
1872 
1873 	blame->cb_args.view = view;
1874 	blame->cb_args.lines = blame->lines;
1875 	blame->cb_args.nlines = blame->nlines;
1876 	blame->cb_args.mutex = mutex;
1877 	blame->cb_args.commit_id = got_object_id_dup(commit_id);
1878 	if (blame->cb_args.commit_id == NULL) {
1879 		err = got_error_from_errno();
1880 		goto done;
1881 	}
1882 	blame->cb_args.f = blame->f;
1883 	blame->cb_args.path = path;
1884 	blame->cb_args.first_displayed_line = first_displayed_line;
1885 	blame->cb_args.selected_line = selected_line;
1886 	blame->cb_args.last_displayed_line = last_displayed_line;
1887 	blame->cb_args.quit = done;
1888 	blame->cb_args.eof = eof;
1889 
1890 	blame->thread_args.path = path;
1891 	blame->thread_args.repo = thread_repo;
1892 	blame->thread_args.cb_args = &blame->cb_args;
1893 	blame->thread_args.complete = blame_complete;
1894 	*blame_complete = 0;
1895 
1896 	if (pthread_create(&blame->thread, NULL, blame_thread,
1897 	    &blame->thread_args) != 0) {
1898 		err = got_error_from_errno();
1899 		goto done;
1900 	}
1901 
1902 done:
1903 	if (blob)
1904 		got_object_blob_close(blob);
1905 	if (obj)
1906 		got_object_close(obj);
1907 	if (err)
1908 		stop_blame(blame);
1909 	return err;
1910 }
1911 
1912 static const struct got_error *
1913 open_blame_view(struct tog_view *view, char *path,
1914     struct got_object_id *commit_id, struct got_repository *repo)
1915 {
1916 	const struct got_error *err = NULL;
1917 	struct tog_blame_view_state *s = &view->state.blame;
1918 
1919 	SIMPLEQ_INIT(&s->blamed_commits);
1920 
1921 	if (pthread_mutex_init(&s->mutex, NULL) != 0)
1922 		return got_error_from_errno();
1923 
1924 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
1925 	if (err)
1926 		return err;
1927 
1928 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
1929 	s->first_displayed_line = 1;
1930 	s->last_displayed_line = view->nlines;
1931 	s->selected_line = 1;
1932 	s->blame_complete = 0;
1933 	s->path = path;
1934 	if (s->path == NULL)
1935 		return got_error_from_errno();
1936 	s->repo = repo;
1937 	s->commit_id = commit_id;
1938 	memset(&s->blame, 0, sizeof(s->blame));
1939 
1940 	view->show = show_blame_view;
1941 	view->input = input_blame_view;
1942 	view->close = close_blame_view;
1943 
1944 	return run_blame(&s->blame, &s->mutex, view, &s->blame_complete,
1945 	    &s->first_displayed_line, &s->last_displayed_line,
1946 	    &s->selected_line, &s->done, &s->eof, s->path,
1947 	    s->blamed_commit->id, s->repo);
1948 }
1949 
1950 static const struct got_error *
1951 close_blame_view(struct tog_view *view)
1952 {
1953 	const struct got_error *err = NULL;
1954 	struct tog_blame_view_state *s = &view->state.blame;
1955 
1956 	if (s->blame.thread)
1957 		err = stop_blame(&s->blame);
1958 
1959 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
1960 		struct got_object_qid *blamed_commit;
1961 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
1962 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
1963 		got_object_qid_free(blamed_commit);
1964 	}
1965 
1966 	free(s->path);
1967 
1968 	return err;
1969 }
1970 
1971 static const struct got_error *
1972 show_blame_view(struct tog_view *view)
1973 {
1974 	const struct got_error *err = NULL;
1975 	struct tog_blame_view_state *s = &view->state.blame;
1976 
1977 	if (pthread_mutex_lock(&s->mutex) != 0)
1978 		return got_error_from_errno();
1979 
1980 	err = draw_blame(view, s->blamed_commit->id, s->blame.f,
1981 	    s->path, s->blame.lines, s->blame.nlines, s->blame_complete,
1982 	    s->selected_line, &s->first_displayed_line,
1983 	    &s->last_displayed_line, &s->eof, view->nlines);
1984 
1985 	if (pthread_mutex_unlock(&s->mutex) != 0 && err == NULL)
1986 		err = got_error_from_errno();
1987 
1988 	return err;
1989 }
1990 
1991 static const struct got_error *
1992 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
1993     struct tog_view *view, int ch)
1994 {
1995 	const struct got_error *err = NULL, *thread_err = NULL;
1996 	struct got_object *obj = NULL, *pobj = NULL;
1997 	struct tog_view *diff_view;
1998 	struct tog_blame_view_state *s = &view->state.blame;
1999 
2000 	if (pthread_mutex_lock(&s->mutex) != 0) {
2001 		err = got_error_from_errno();
2002 		goto done;
2003 	}
2004 
2005 	switch (ch) {
2006 		case 'q':
2007 			s->done = 1;
2008 			if (pthread_mutex_unlock(&s->mutex) != 0) {
2009 				err = got_error_from_errno();
2010 				goto done;
2011 			}
2012 			return stop_blame(&s->blame);
2013 		case 'k':
2014 		case KEY_UP:
2015 			if (s->selected_line > 1)
2016 				s->selected_line--;
2017 			else if (s->selected_line == 1 &&
2018 			    s->first_displayed_line > 1)
2019 				s->first_displayed_line--;
2020 			break;
2021 		case KEY_PPAGE:
2022 		case KEY_BACKSPACE:
2023 			if (s->first_displayed_line == 1) {
2024 				s->selected_line = 1;
2025 				break;
2026 			}
2027 			if (s->first_displayed_line > view->nlines - 2)
2028 				s->first_displayed_line -=
2029 				    (view->nlines - 2);
2030 			else
2031 				s->first_displayed_line = 1;
2032 			break;
2033 		case 'j':
2034 		case KEY_DOWN:
2035 			if (s->selected_line < view->nlines - 2 &&
2036 			    s->first_displayed_line +
2037 			    s->selected_line <= s->blame.nlines)
2038 				s->selected_line++;
2039 			else if (s->last_displayed_line <
2040 			    s->blame.nlines)
2041 				s->first_displayed_line++;
2042 			break;
2043 		case 'b':
2044 		case 'p': {
2045 			struct got_object_id *id;
2046 			id = get_selected_commit_id(s->blame.lines,
2047 			    s->first_displayed_line, s->selected_line);
2048 			if (id == NULL || got_object_id_cmp(id,
2049 			    s->blamed_commit->id) == 0)
2050 				break;
2051 			err = open_selected_commit(&pobj, &obj,
2052 			    s->blame.lines, s->first_displayed_line,
2053 			    s->selected_line, s->repo);
2054 			if (err)
2055 				break;
2056 			if (pobj == NULL && obj == NULL)
2057 				break;
2058 			if (ch == 'p' && pobj == NULL)
2059 				break;
2060 			s->done = 1;
2061 			if (pthread_mutex_unlock(&s->mutex) != 0) {
2062 				err = got_error_from_errno();
2063 				goto done;
2064 			}
2065 			thread_err = stop_blame(&s->blame);
2066 			s->done = 0;
2067 			if (pthread_mutex_lock(&s->mutex) != 0) {
2068 				err = got_error_from_errno();
2069 				goto done;
2070 			}
2071 			if (thread_err)
2072 				break;
2073 			id = got_object_get_id(ch == 'b' ? obj : pobj);
2074 			got_object_close(obj);
2075 			obj = NULL;
2076 			if (pobj) {
2077 				got_object_close(pobj);
2078 				pobj = NULL;
2079 			}
2080 			if (id == NULL) {
2081 				err = got_error_from_errno();
2082 				break;
2083 			}
2084 			err = got_object_qid_alloc(
2085 			    &s->blamed_commit, id);
2086 			free(id);
2087 			if (err)
2088 				goto done;
2089 			SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
2090 			    s->blamed_commit, entry);
2091 			err = run_blame(&s->blame, &s->mutex, view,
2092 			    &s->blame_complete,
2093 			    &s->first_displayed_line,
2094 			    &s->last_displayed_line,
2095 			    &s->selected_line, &s->done, &s->eof,
2096 			    s->path, s->blamed_commit->id, s->repo);
2097 			if (err)
2098 				break;
2099 			break;
2100 		}
2101 		case 'B': {
2102 			struct got_object_qid *first;
2103 			first = SIMPLEQ_FIRST(&s->blamed_commits);
2104 			if (!got_object_id_cmp(first->id, s->commit_id))
2105 				break;
2106 			s->done = 1;
2107 			if (pthread_mutex_unlock(&s->mutex) != 0) {
2108 				err = got_error_from_errno();
2109 				goto done;
2110 			}
2111 			thread_err = stop_blame(&s->blame);
2112 			s->done = 0;
2113 			if (pthread_mutex_lock(&s->mutex) != 0) {
2114 				err = got_error_from_errno();
2115 				goto done;
2116 			}
2117 			if (thread_err)
2118 				break;
2119 			SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
2120 			got_object_qid_free(s->blamed_commit);
2121 			s->blamed_commit =
2122 			    SIMPLEQ_FIRST(&s->blamed_commits);
2123 			err = run_blame(&s->blame, &s->mutex, view,
2124 			    &s->blame_complete,
2125 			    &s->first_displayed_line,
2126 			    &s->last_displayed_line,
2127 			    &s->selected_line, &s->done, &s->eof, s->path,
2128 			    s->blamed_commit->id, s->repo);
2129 			if (err)
2130 				break;
2131 			break;
2132 		}
2133 		case KEY_ENTER:
2134 		case '\r':
2135 			err = open_selected_commit(&pobj, &obj,
2136 			    s->blame.lines, s->first_displayed_line,
2137 			    s->selected_line, s->repo);
2138 			if (err)
2139 				break;
2140 			if (pobj == NULL && obj == NULL)
2141 				break;
2142 			diff_view = view_open(0, 0, 0, 0, view,
2143 			    TOG_VIEW_DIFF);
2144 			if (diff_view == NULL) {
2145 				err = got_error_from_errno();
2146 				break;
2147 			}
2148 			err = open_diff_view(diff_view, pobj, obj,
2149 			    s->repo);
2150 			if (err) {
2151 				view_close(diff_view);
2152 				break;
2153 			}
2154 			*new_view = diff_view;
2155 			if (pobj) {
2156 				got_object_close(pobj);
2157 				pobj = NULL;
2158 			}
2159 			got_object_close(obj);
2160 			obj = NULL;
2161 			if (err)
2162 				break;
2163 			break;
2164 		case KEY_NPAGE:
2165 		case ' ':
2166 			if (s->last_displayed_line >= s->blame.nlines &&
2167 			    s->selected_line < view->nlines - 2) {
2168 				s->selected_line = MIN(s->blame.nlines,
2169 				    view->nlines - 2);
2170 				break;
2171 			}
2172 			if (s->last_displayed_line + view->nlines - 2
2173 			    <= s->blame.nlines)
2174 				s->first_displayed_line +=
2175 				    view->nlines - 2;
2176 			else
2177 				s->first_displayed_line =
2178 				    s->blame.nlines -
2179 				    (view->nlines - 3);
2180 			break;
2181 		case KEY_RESIZE:
2182 			if (s->selected_line > view->nlines - 2) {
2183 				s->selected_line = MIN(s->blame.nlines,
2184 				    view->nlines - 2);
2185 			}
2186 			break;
2187 		default:
2188 			break;
2189 	}
2190 
2191 	if (pthread_mutex_unlock(&s->mutex) != 0)
2192 		err = got_error_from_errno();
2193 done:
2194 	if (pobj)
2195 		got_object_close(pobj);
2196 	return thread_err ? thread_err : err;
2197 }
2198 
2199 static const struct got_error *
2200 cmd_blame(int argc, char *argv[])
2201 {
2202 	const struct got_error *error;
2203 	struct got_repository *repo = NULL;
2204 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
2205 	struct got_object_id *commit_id = NULL;
2206 	char *commit_id_str = NULL;
2207 	int ch;
2208 	struct tog_view *view;
2209 
2210 #ifndef PROFILE
2211 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
2212 		err(1, "pledge");
2213 #endif
2214 
2215 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
2216 		switch (ch) {
2217 		case 'c':
2218 			commit_id_str = optarg;
2219 			break;
2220 		case 'r':
2221 			repo_path = realpath(optarg, NULL);
2222 			if (repo_path == NULL)
2223 				err(1, "-r option");
2224 			break;
2225 		default:
2226 			usage();
2227 			/* NOTREACHED */
2228 		}
2229 	}
2230 
2231 	argc -= optind;
2232 	argv += optind;
2233 
2234 	if (argc == 1)
2235 		path = argv[0];
2236 	else
2237 		usage_blame();
2238 
2239 	cwd = getcwd(NULL, 0);
2240 	if (cwd == NULL) {
2241 		error = got_error_from_errno();
2242 		goto done;
2243 	}
2244 	if (repo_path == NULL) {
2245 		repo_path = strdup(cwd);
2246 		if (repo_path == NULL) {
2247 			error = got_error_from_errno();
2248 			goto done;
2249 		}
2250 	}
2251 
2252 
2253 	error = got_repo_open(&repo, repo_path);
2254 	if (error != NULL)
2255 		return error;
2256 
2257 	error = got_repo_map_path(&in_repo_path, repo, path);
2258 	if (error != NULL)
2259 		goto done;
2260 
2261 	if (commit_id_str == NULL) {
2262 		struct got_reference *head_ref;
2263 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
2264 		if (error != NULL)
2265 			goto done;
2266 		error = got_ref_resolve(&commit_id, repo, head_ref);
2267 		got_ref_close(head_ref);
2268 	} else {
2269 		struct got_object *obj;
2270 		error = got_object_open_by_id_str(&obj, repo, commit_id_str);
2271 		if (error != NULL)
2272 			goto done;
2273 		commit_id = got_object_get_id(obj);
2274 		if (commit_id == NULL)
2275 			error = got_error_from_errno();
2276 		got_object_close(obj);
2277 	}
2278 	if (error != NULL)
2279 		goto done;
2280 
2281 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_BLAME);
2282 	if (view == NULL) {
2283 		error = got_error_from_errno();
2284 		goto done;
2285 	}
2286 	error = open_blame_view(view, in_repo_path, commit_id, repo);
2287 	if (error)
2288 		goto done;
2289 	error = view_loop(view);
2290 done:
2291 	free(repo_path);
2292 	free(cwd);
2293 	free(commit_id);
2294 	if (repo)
2295 		got_repo_close(repo);
2296 	return error;
2297 }
2298 
2299 static const struct got_error *
2300 draw_tree_entries(struct tog_view *view,
2301     struct got_tree_entry **first_displayed_entry,
2302     struct got_tree_entry **last_displayed_entry,
2303     struct got_tree_entry **selected_entry, int *ndisplayed,
2304     const char *label, int show_ids, const char *parent_path,
2305     const struct got_tree_entries *entries, int selected, int limit, int isroot)
2306 {
2307 	const struct got_error *err = NULL;
2308 	struct got_tree_entry *te;
2309 	wchar_t *wline;
2310 	int width, n;
2311 
2312 	*ndisplayed = 0;
2313 
2314 	werase(view->window);
2315 
2316 	if (limit == 0)
2317 		return NULL;
2318 
2319 	err = format_line(&wline, &width, label, view->ncols);
2320 	if (err)
2321 		return err;
2322 	waddwstr(view->window, wline);
2323 	free(wline);
2324 	wline = NULL;
2325 	if (width < view->ncols)
2326 		waddch(view->window, '\n');
2327 	if (--limit <= 0)
2328 		return NULL;
2329 	err = format_line(&wline, &width, parent_path, view->ncols);
2330 	if (err)
2331 		return err;
2332 	waddwstr(view->window, wline);
2333 	free(wline);
2334 	wline = NULL;
2335 	if (width < view->ncols)
2336 		waddch(view->window, '\n');
2337 	if (--limit <= 0)
2338 		return NULL;
2339 	waddch(view->window, '\n');
2340 	if (--limit <= 0)
2341 		return NULL;
2342 
2343 	te = SIMPLEQ_FIRST(&entries->head);
2344 	if (*first_displayed_entry == NULL) {
2345 		if (selected == 0) {
2346 			wstandout(view->window);
2347 			*selected_entry = NULL;
2348 		}
2349 		waddstr(view->window, "  ..\n");	/* parent directory */
2350 		if (selected == 0)
2351 			wstandend(view->window);
2352 		(*ndisplayed)++;
2353 		if (--limit <= 0)
2354 			return NULL;
2355 		n = 1;
2356 	} else {
2357 		n = 0;
2358 		while (te != *first_displayed_entry)
2359 			te = SIMPLEQ_NEXT(te, entry);
2360 	}
2361 
2362 	while (te) {
2363 		char *line = NULL, *id_str = NULL;
2364 
2365 		if (show_ids) {
2366 			err = got_object_id_str(&id_str, te->id);
2367 			if (err)
2368 				return got_error_from_errno();
2369 		}
2370 		if (asprintf(&line, "%s  %s%s", id_str ? id_str : "",
2371 		    te->name, S_ISDIR(te->mode) ? "/" : "") == -1) {
2372 			free(id_str);
2373 			return got_error_from_errno();
2374 		}
2375 		free(id_str);
2376 		err = format_line(&wline, &width, line, view->ncols);
2377 		if (err) {
2378 			free(line);
2379 			break;
2380 		}
2381 		if (n == selected) {
2382 			wstandout(view->window);
2383 			*selected_entry = te;
2384 		}
2385 		waddwstr(view->window, wline);
2386 		if (width < view->ncols)
2387 			waddch(view->window, '\n');
2388 		if (n == selected)
2389 			wstandend(view->window);
2390 		free(line);
2391 		free(wline);
2392 		wline = NULL;
2393 		n++;
2394 		(*ndisplayed)++;
2395 		*last_displayed_entry = te;
2396 		if (--limit <= 0)
2397 			break;
2398 		te = SIMPLEQ_NEXT(te, entry);
2399 	}
2400 
2401 	return err;
2402 }
2403 
2404 static void
2405 tree_scroll_up(struct got_tree_entry **first_displayed_entry, int maxscroll,
2406     const struct got_tree_entries *entries, int isroot)
2407 {
2408 	struct got_tree_entry *te, *prev;
2409 	int i;
2410 
2411 	if (*first_displayed_entry == NULL)
2412 		return;
2413 
2414 	te = SIMPLEQ_FIRST(&entries->head);
2415 	if (*first_displayed_entry == te) {
2416 		if (!isroot)
2417 			*first_displayed_entry = NULL;
2418 		return;
2419 	}
2420 
2421 	/* XXX this is stupid... switch to TAILQ? */
2422 	for (i = 0; i < maxscroll; i++) {
2423 		while (te != *first_displayed_entry) {
2424 			prev = te;
2425 			te = SIMPLEQ_NEXT(te, entry);
2426 		}
2427 		*first_displayed_entry = prev;
2428 		te = SIMPLEQ_FIRST(&entries->head);
2429 	}
2430 	if (!isroot && te == SIMPLEQ_FIRST(&entries->head) && i < maxscroll)
2431 		*first_displayed_entry = NULL;
2432 }
2433 
2434 static void
2435 tree_scroll_down(struct got_tree_entry **first_displayed_entry, int maxscroll,
2436 	struct got_tree_entry *last_displayed_entry,
2437 	const struct got_tree_entries *entries)
2438 {
2439 	struct got_tree_entry *next;
2440 	int n = 0;
2441 
2442 	if (SIMPLEQ_NEXT(last_displayed_entry, entry) == NULL)
2443 		return;
2444 
2445 	if (*first_displayed_entry)
2446 		next = SIMPLEQ_NEXT(*first_displayed_entry, entry);
2447 	else
2448 		next = SIMPLEQ_FIRST(&entries->head);
2449 	while (next) {
2450 		*first_displayed_entry = next;
2451 		if (++n >= maxscroll)
2452 			break;
2453 		next = SIMPLEQ_NEXT(next, entry);
2454 	}
2455 }
2456 
2457 static const struct got_error *
2458 tree_entry_path(char **path, struct tog_parent_trees *parents,
2459     struct got_tree_entry *te)
2460 {
2461 	const struct got_error *err = NULL;
2462 	struct tog_parent_tree *pt;
2463 	size_t len = 2; /* for leading slash and NUL */
2464 
2465 	TAILQ_FOREACH(pt, parents, entry)
2466 		len += strlen(pt->selected_entry->name) + 1 /* slash */;
2467 	if (te)
2468 		len += strlen(te->name);
2469 
2470 	*path = calloc(1, len);
2471 	if (path == NULL)
2472 		return got_error_from_errno();
2473 
2474 	(*path)[0] = '/';
2475 	pt = TAILQ_LAST(parents, tog_parent_trees);
2476 	while (pt) {
2477 		if (strlcat(*path, pt->selected_entry->name, len) >= len) {
2478 			err = got_error(GOT_ERR_NO_SPACE);
2479 			goto done;
2480 		}
2481 		if (strlcat(*path, "/", len) >= len) {
2482 			err = got_error(GOT_ERR_NO_SPACE);
2483 			goto done;
2484 		}
2485 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
2486 	}
2487 	if (te) {
2488 		if (strlcat(*path, te->name, len) >= len) {
2489 			err = got_error(GOT_ERR_NO_SPACE);
2490 			goto done;
2491 		}
2492 	}
2493 done:
2494 	if (err) {
2495 		free(*path);
2496 		*path = NULL;
2497 	}
2498 	return err;
2499 }
2500 
2501 static const struct got_error *
2502 blame_tree_entry(struct tog_view **new_view, struct tog_view *parent_view,
2503     struct got_tree_entry *te, struct tog_parent_trees *parents,
2504     struct got_object_id *commit_id, struct got_repository *repo)
2505 {
2506 	const struct got_error *err = NULL;
2507 	char *path;
2508 	struct tog_view *blame_view;
2509 
2510 	err = tree_entry_path(&path, parents, te);
2511 	if (err)
2512 		return err;
2513 
2514 	blame_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_BLAME);
2515 	if (blame_view == NULL)
2516 		return got_error_from_errno();
2517 
2518 	err = open_blame_view(blame_view, path, commit_id, repo);
2519 	if (err) {
2520 		view_close(blame_view);
2521 		free(path);
2522 	} else
2523 		*new_view = blame_view;
2524 	return err;
2525 }
2526 
2527 static const struct got_error *
2528 log_tree_entry(struct tog_view **new_view, struct tog_view *parent_view,
2529     struct got_tree_entry *te, struct tog_parent_trees *parents,
2530     struct got_object_id *commit_id, struct got_repository *repo)
2531 {
2532 	struct tog_view *log_view;
2533 	const struct got_error *err = NULL;
2534 	char *path;
2535 
2536 	log_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_LOG);
2537 	if (log_view == NULL)
2538 		return got_error_from_errno();
2539 
2540 	err = tree_entry_path(&path, parents, te);
2541 	if (err)
2542 		return err;
2543 
2544 	err = open_log_view(log_view, commit_id, repo, path);
2545 	if (err)
2546 		view_close(log_view);
2547 	else
2548 		*new_view = log_view;
2549 	free(path);
2550 	return err;
2551 }
2552 
2553 static const struct got_error *
2554 open_tree_view(struct tog_view *view, struct got_tree_object *root,
2555     struct got_object_id *commit_id, struct got_repository *repo)
2556 {
2557 	const struct got_error *err = NULL;
2558 	char *commit_id_str = NULL;
2559 	struct tog_tree_view_state *s = &view->state.tree;
2560 
2561 	TAILQ_INIT(&s->parents);
2562 
2563 	err = got_object_id_str(&commit_id_str, commit_id);
2564 	if (err != NULL)
2565 		goto done;
2566 
2567 	if (asprintf(&s->tree_label, "commit: %s", commit_id_str) == -1) {
2568 		err = got_error_from_errno();
2569 		goto done;
2570 	}
2571 
2572 	s->root = s->tree = root;
2573 	s->entries = got_object_tree_get_entries(root);
2574 	s->first_displayed_entry = SIMPLEQ_FIRST(&s->entries->head);
2575 	s->commit_id = commit_id;
2576 	s->repo = repo;
2577 
2578 	view->show = show_tree_view;
2579 	view->input = input_tree_view;
2580 	view->close = close_tree_view;
2581 done:
2582 	free(commit_id_str);
2583 	if (err)
2584 		free(s->tree_label);
2585 	return err;
2586 }
2587 
2588 static const struct got_error *
2589 close_tree_view(struct tog_view *view)
2590 {
2591 	struct tog_tree_view_state *s = &view->state.tree;
2592 
2593 	free(s->tree_label);
2594 	while (!TAILQ_EMPTY(&s->parents)) {
2595 		struct tog_parent_tree *parent;
2596 		parent = TAILQ_FIRST(&s->parents);
2597 		TAILQ_REMOVE(&s->parents, parent, entry);
2598 		free(parent);
2599 
2600 	}
2601 	if (s->tree != s->root)
2602 		got_object_tree_close(s->tree);
2603 	got_object_tree_close(s->root);
2604 
2605 	return NULL;
2606 }
2607 
2608 static const struct got_error *
2609 show_tree_view(struct tog_view *view)
2610 {
2611 	const struct got_error *err = NULL;
2612 	struct tog_tree_view_state *s = &view->state.tree;
2613 	char *parent_path;
2614 
2615 	err = tree_entry_path(&parent_path, &s->parents, NULL);
2616 	if (err)
2617 		return err;
2618 
2619 	err = draw_tree_entries(view, &s->first_displayed_entry,
2620 	    &s->last_displayed_entry, &s->selected_entry,
2621 	    &s->ndisplayed, s->tree_label, s->show_ids, parent_path,
2622 	    s->entries, s->selected, view->nlines, s->tree == s->root);
2623 	free(parent_path);
2624 	return err;
2625 }
2626 
2627 static const struct got_error *
2628 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
2629     struct tog_view *view, int ch)
2630 {
2631 	const struct got_error *err = NULL;
2632 	struct tog_tree_view_state *s = &view->state.tree;
2633 
2634 	switch (ch) {
2635 		case 'i':
2636 			s->show_ids = !s->show_ids;
2637 			break;
2638 		case 'l':
2639 			if (s->selected_entry) {
2640 				err = log_tree_entry(new_view, view,
2641 				    s->selected_entry, &s->parents,
2642 				    s->commit_id, s->repo);
2643 			}
2644 			break;
2645 		case 'k':
2646 		case KEY_UP:
2647 			if (s->selected > 0)
2648 				s->selected--;
2649 			if (s->selected > 0)
2650 				break;
2651 			tree_scroll_up(&s->first_displayed_entry, 1,
2652 			    s->entries, s->tree == s->root);
2653 			break;
2654 		case KEY_PPAGE:
2655 			if (SIMPLEQ_FIRST(&s->entries->head) ==
2656 			    s->first_displayed_entry) {
2657 				if (s->tree != s->root)
2658 					s->first_displayed_entry = NULL;
2659 				s->selected = 0;
2660 				break;
2661 			}
2662 			tree_scroll_up(&s->first_displayed_entry,
2663 			    view->nlines, s->entries,
2664 			    s->tree == s->root);
2665 			break;
2666 		case 'j':
2667 		case KEY_DOWN:
2668 			if (s->selected < s->ndisplayed - 1) {
2669 				s->selected++;
2670 				break;
2671 			}
2672 			tree_scroll_down(&s->first_displayed_entry, 1,
2673 			    s->last_displayed_entry, s->entries);
2674 			break;
2675 		case KEY_NPAGE:
2676 			tree_scroll_down(&s->first_displayed_entry,
2677 			    view->nlines, s->last_displayed_entry,
2678 			    s->entries);
2679 			if (SIMPLEQ_NEXT(s->last_displayed_entry,
2680 			    entry))
2681 				break;
2682 			/* can't scroll any further; move cursor down */
2683 			if (s->selected < s->ndisplayed - 1)
2684 				s->selected = s->ndisplayed - 1;
2685 			break;
2686 		case KEY_ENTER:
2687 		case '\r':
2688 			if (s->selected_entry == NULL) {
2689 				struct tog_parent_tree *parent;
2690 		case KEY_BACKSPACE:
2691 				/* user selected '..' */
2692 				if (s->tree == s->root)
2693 					break;
2694 				parent = TAILQ_FIRST(&s->parents);
2695 				TAILQ_REMOVE(&s->parents, parent,
2696 				    entry);
2697 				got_object_tree_close(s->tree);
2698 				s->tree = parent->tree;
2699 				s->entries =
2700 				    got_object_tree_get_entries(s->tree);
2701 				s->first_displayed_entry =
2702 				    parent->first_displayed_entry;
2703 				s->selected_entry =
2704 				    parent->selected_entry;
2705 				s->selected = parent->selected;
2706 				free(parent);
2707 			} else if (S_ISDIR(s->selected_entry->mode)) {
2708 				struct tog_parent_tree *parent;
2709 				struct got_tree_object *child;
2710 				err = got_object_open_as_tree(&child,
2711 				    s->repo, s->selected_entry->id);
2712 				if (err)
2713 					break;
2714 				parent = calloc(1, sizeof(*parent));
2715 				if (parent == NULL) {
2716 					err = got_error_from_errno();
2717 					break;
2718 				}
2719 				parent->tree = s->tree;
2720 				parent->first_displayed_entry =
2721 				   s->first_displayed_entry;
2722 				parent->selected_entry = s->selected_entry;
2723 				parent->selected = s->selected;
2724 				TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2725 				s->tree = child;
2726 				s->entries =
2727 				    got_object_tree_get_entries(s->tree);
2728 				s->selected = 0;
2729 				s->first_displayed_entry = NULL;
2730 			} else if (S_ISREG(s->selected_entry->mode)) {
2731 				err = blame_tree_entry(new_view, view,
2732 				    s->selected_entry, &s->parents,
2733 				    s->commit_id, s->repo);
2734 				if (err)
2735 					break;
2736 			}
2737 			break;
2738 		case KEY_RESIZE:
2739 			if (s->selected > view->nlines)
2740 				s->selected = s->ndisplayed - 1;
2741 			break;
2742 		default:
2743 			break;
2744 	}
2745 
2746 	return err;
2747 }
2748 
2749 __dead static void
2750 usage_tree(void)
2751 {
2752 	endwin();
2753 	fprintf(stderr, "usage: %s tree [-c commit] [repository-path]\n",
2754 	    getprogname());
2755 	exit(1);
2756 }
2757 
2758 static const struct got_error *
2759 cmd_tree(int argc, char *argv[])
2760 {
2761 	const struct got_error *error;
2762 	struct got_repository *repo = NULL;
2763 	char *repo_path = NULL;
2764 	struct got_object_id *commit_id = NULL;
2765 	char *commit_id_arg = NULL;
2766 	struct got_commit_object *commit = NULL;
2767 	struct got_tree_object *tree = NULL;
2768 	int ch;
2769 	struct tog_view *view;
2770 
2771 #ifndef PROFILE
2772 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
2773 		err(1, "pledge");
2774 #endif
2775 
2776 	while ((ch = getopt(argc, argv, "c:")) != -1) {
2777 		switch (ch) {
2778 		case 'c':
2779 			commit_id_arg = optarg;
2780 			break;
2781 		default:
2782 			usage();
2783 			/* NOTREACHED */
2784 		}
2785 	}
2786 
2787 	argc -= optind;
2788 	argv += optind;
2789 
2790 	if (argc == 0) {
2791 		repo_path = getcwd(NULL, 0);
2792 		if (repo_path == NULL)
2793 			return got_error_from_errno();
2794 	} else if (argc == 1) {
2795 		repo_path = realpath(argv[0], NULL);
2796 		if (repo_path == NULL)
2797 			return got_error_from_errno();
2798 	} else
2799 		usage_log();
2800 
2801 	error = got_repo_open(&repo, repo_path);
2802 	free(repo_path);
2803 	if (error != NULL)
2804 		return error;
2805 
2806 	if (commit_id_arg == NULL) {
2807 		error = get_head_commit_id(&commit_id, repo);
2808 		if (error != NULL)
2809 			goto done;
2810 	} else {
2811 		struct got_object *obj;
2812 		error = got_object_open_by_id_str(&obj, repo, commit_id_arg);
2813 		if (error == NULL) {
2814 			commit_id = got_object_get_id(obj);
2815 			if (commit_id == NULL)
2816 				error = got_error_from_errno();
2817 		}
2818 	}
2819 	if (error != NULL)
2820 		goto done;
2821 
2822 	error = got_object_open_as_commit(&commit, repo, commit_id);
2823 	if (error != NULL)
2824 		goto done;
2825 
2826 	error = got_object_open_as_tree(&tree, repo, commit->tree_id);
2827 	if (error != NULL)
2828 		goto done;
2829 
2830 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_TREE);
2831 	if (view == NULL) {
2832 		error = got_error_from_errno();
2833 		goto done;
2834 	}
2835 	error = open_tree_view(view, tree, commit_id, repo);
2836 	if (error)
2837 		goto done;
2838 	error = view_loop(view);
2839 done:
2840 	free(commit_id);
2841 	if (commit)
2842 		got_object_commit_close(commit);
2843 	if (tree)
2844 		got_object_tree_close(tree);
2845 	if (repo)
2846 		got_repo_close(repo);
2847 	return error;
2848 }
2849 static void
2850 init_curses(void)
2851 {
2852 	initscr();
2853 	cbreak();
2854 	noecho();
2855 	nonl();
2856 	intrflush(stdscr, FALSE);
2857 	keypad(stdscr, TRUE);
2858 	curs_set(0);
2859 }
2860 
2861 __dead static void
2862 usage(void)
2863 {
2864 	int i;
2865 
2866 	fprintf(stderr, "usage: %s [-h] [command] [arg ...]\n\n"
2867 	    "Available commands:\n", getprogname());
2868 	for (i = 0; i < nitems(tog_commands); i++) {
2869 		struct tog_cmd *cmd = &tog_commands[i];
2870 		fprintf(stderr, "    %s: %s\n", cmd->name, cmd->descr);
2871 	}
2872 	exit(1);
2873 }
2874 
2875 static char **
2876 make_argv(const char *arg0, const char *arg1)
2877 {
2878 	char **argv;
2879 	int argc = (arg1 == NULL ? 1 : 2);
2880 
2881 	argv = calloc(argc, sizeof(char *));
2882 	if (argv == NULL)
2883 		err(1, "calloc");
2884 	argv[0] = strdup(arg0);
2885 	if (argv[0] == NULL)
2886 		err(1, "calloc");
2887 	if (arg1) {
2888 		argv[1] = strdup(arg1);
2889 		if (argv[1] == NULL)
2890 			err(1, "calloc");
2891 	}
2892 
2893 	return argv;
2894 }
2895 
2896 int
2897 main(int argc, char *argv[])
2898 {
2899 	const struct got_error *error = NULL;
2900 	struct tog_cmd *cmd = NULL;
2901 	int ch, hflag = 0;
2902 	char **cmd_argv = NULL;
2903 
2904 	setlocale(LC_ALL, "");
2905 
2906 	while ((ch = getopt(argc, argv, "h")) != -1) {
2907 		switch (ch) {
2908 		case 'h':
2909 			hflag = 1;
2910 			break;
2911 		default:
2912 			usage();
2913 			/* NOTREACHED */
2914 		}
2915 	}
2916 
2917 	argc -= optind;
2918 	argv += optind;
2919 	optind = 0;
2920 	optreset = 1;
2921 
2922 	if (argc == 0) {
2923 		if (hflag)
2924 			usage();
2925 		/* Build an argument vector which runs a default command. */
2926 		cmd = &tog_commands[0];
2927 		cmd_argv = make_argv(cmd->name, NULL);
2928 		argc = 1;
2929 	} else {
2930 		int i;
2931 
2932 		/* Did the user specific a command? */
2933 		for (i = 0; i < nitems(tog_commands); i++) {
2934 			if (strncmp(tog_commands[i].name, argv[0],
2935 			    strlen(argv[0])) == 0) {
2936 				cmd = &tog_commands[i];
2937 				if (hflag)
2938 					tog_commands[i].cmd_usage();
2939 				break;
2940 			}
2941 		}
2942 		if (cmd == NULL) {
2943 			/* Did the user specify a repository? */
2944 			char *repo_path = realpath(argv[0], NULL);
2945 			if (repo_path) {
2946 				struct got_repository *repo;
2947 				error = got_repo_open(&repo, repo_path);
2948 				if (error == NULL)
2949 					got_repo_close(repo);
2950 			} else
2951 				error = got_error_from_errno();
2952 			if (error) {
2953 				if (hflag) {
2954 					fprintf(stderr, "%s: '%s' is not a "
2955 					    "known command\n", getprogname(),
2956 					    argv[0]);
2957 					usage();
2958 				}
2959 				fprintf(stderr, "%s: '%s' is neither a known "
2960 				    "command nor a path to a repository\n",
2961 				    getprogname(), argv[0]);
2962 				free(repo_path);
2963 				return 1;
2964 			}
2965 			cmd = &tog_commands[0];
2966 			cmd_argv = make_argv(cmd->name, repo_path);
2967 			argc = 2;
2968 			free(repo_path);
2969 		}
2970 	}
2971 
2972 	init_curses();
2973 
2974 	error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
2975 	if (error)
2976 		goto done;
2977 done:
2978 	endwin();
2979 	free(cmd_argv);
2980 	if (error)
2981 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
2982 	return 0;
2983 }