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, *prev;
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 KEY_BACKSPACE:
366 			prev = TAILQ_PREV(view, tog_view_list_head, entry);
367 			if (prev)
368 				*focus = prev;
369 			else
370 				*focus = TAILQ_LAST(views, tog_view_list_head);
371 			break;
372 		case 'q':
373 			err = view->input(new, dead, view, ch);
374 			*dead = view;
375 			break;
376 		case 'Q':
377 			*done = 1;
378 			break;
379 		case KEY_RESIZE:
380 			err = view_resize(view);
381 			if (err)
382 				return err;
383 			err = view->input(new, dead, view, ch);
384 			break;
385 		default:
386 			err = view->input(new, dead, view, ch);
387 			break;
388 	}
389 
390 	return err;
391 }
392 
393 static const struct got_error *
394 view_loop(struct tog_view *view)
395 {
396 	const struct got_error *err = NULL;
397 	struct tog_view_list_head views;
398 	struct tog_view *new_view, *dead_view;
399 	int done = 0;
400 
401 	TAILQ_INIT(&views);
402 	TAILQ_INSERT_HEAD(&views, view, entry);
403 
404 	while (!TAILQ_EMPTY(&views) && !done) {
405 		err = view_show(view);
406 		if (err)
407 			break;
408 		err = view_input(&new_view, &dead_view, &view, &done,
409 		    view, &views);
410 		if (err)
411 			break;
412 		if (new_view) {
413 			TAILQ_INSERT_TAIL(&views, new_view, entry);
414 			view = new_view;
415 		}
416 		if (dead_view) {
417 			TAILQ_REMOVE(&views, dead_view, entry);
418 			TAILQ_FOREACH(view, &views, entry) {
419 				if (view->parent == dead_view)
420 					view->parent = NULL;
421 			}
422 			if (dead_view->parent)
423 				view = dead_view->parent;
424 			else
425 				view = TAILQ_LAST(&views, tog_view_list_head);
426 			err = view_close(dead_view);
427 			if (err)
428 				goto done;
429 		}
430 	}
431 done:
432 	while (!TAILQ_EMPTY(&views)) {
433 		view = TAILQ_FIRST(&views);
434 		TAILQ_REMOVE(&views, view, entry);
435 		view_close(view);
436 	}
437 	return err;
438 }
439 
440 __dead static void
441 usage_log(void)
442 {
443 	endwin();
444 	fprintf(stderr,
445 	    "usage: %s log [-c commit] [-r repository-path] [path]\n",
446 	    getprogname());
447 	exit(1);
448 }
449 
450 /* Create newly allocated wide-character string equivalent to a byte string. */
451 static const struct got_error *
452 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
453 {
454 	char *vis = NULL;
455 	const struct got_error *err = NULL;
456 
457 	*ws = NULL;
458 	*wlen = mbstowcs(NULL, s, 0);
459 	if (*wlen == (size_t)-1) {
460 		int vislen;
461 		if (errno != EILSEQ)
462 			return got_error_from_errno();
463 
464 		/* byte string invalid in current encoding; try to "fix" it */
465 		err = got_mbsavis(&vis, &vislen, s);
466 		if (err)
467 			return err;
468 		*wlen = mbstowcs(NULL, vis, 0);
469 		if (*wlen == (size_t)-1) {
470 			err = got_error_from_errno(); /* give up */
471 			goto done;
472 		}
473 	}
474 
475 	*ws = calloc(*wlen + 1, sizeof(*ws));
476 	if (*ws == NULL) {
477 		err = got_error_from_errno();
478 		goto done;
479 	}
480 
481 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
482 		err = got_error_from_errno();
483 done:
484 	free(vis);
485 	if (err) {
486 		free(*ws);
487 		*ws = NULL;
488 		*wlen = 0;
489 	}
490 	return err;
491 }
492 
493 /* Format a line for display, ensuring that it won't overflow a width limit. */
494 static const struct got_error *
495 format_line(wchar_t **wlinep, int *widthp, const char *line, int wlimit)
496 {
497 	const struct got_error *err = NULL;
498 	int cols = 0;
499 	wchar_t *wline = NULL;
500 	size_t wlen;
501 	int i;
502 
503 	*wlinep = NULL;
504 	*widthp = 0;
505 
506 	err = mbs2ws(&wline, &wlen, line);
507 	if (err)
508 		return err;
509 
510 	i = 0;
511 	while (i < wlen && cols < wlimit) {
512 		int width = wcwidth(wline[i]);
513 		switch (width) {
514 		case 0:
515 			i++;
516 			break;
517 		case 1:
518 		case 2:
519 			if (cols + width <= wlimit) {
520 				cols += width;
521 				i++;
522 			}
523 			break;
524 		case -1:
525 			if (wline[i] == L'\t')
526 				cols += TABSIZE - ((cols + 1) % TABSIZE);
527 			i++;
528 			break;
529 		default:
530 			err = got_error_from_errno();
531 			goto done;
532 		}
533 	}
534 	wline[i] = L'\0';
535 	if (widthp)
536 		*widthp = cols;
537 done:
538 	if (err)
539 		free(wline);
540 	else
541 		*wlinep = wline;
542 	return err;
543 }
544 
545 static const struct got_error *
546 draw_commit(struct tog_view *view, struct got_commit_object *commit,
547     struct got_object_id *id)
548 {
549 	const struct got_error *err = NULL;
550 	char datebuf[10]; /* YY-MM-DD + SPACE + NUL */
551 	char *logmsg0 = NULL, *logmsg = NULL;
552 	char *author0 = NULL, *author = NULL;
553 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
554 	int author_width, logmsg_width;
555 	char *newline, *smallerthan;
556 	char *line = NULL;
557 	int col, limit;
558 	static const size_t date_display_cols = 9;
559 	static const size_t author_display_cols = 16;
560 	const int avail = view->ncols;
561 
562 	if (strftime(datebuf, sizeof(datebuf), "%g/%m/%d ",
563 	    &commit->tm_committer) >= sizeof(datebuf))
564 		return got_error(GOT_ERR_NO_SPACE);
565 
566 	if (avail < date_display_cols)
567 		limit = MIN(sizeof(datebuf) - 1, avail);
568 	else
569 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
570 	waddnstr(view->window, datebuf, limit);
571 	col = limit + 1;
572 	if (col > avail)
573 		goto done;
574 
575 	author0 = strdup(commit->author);
576 	if (author0 == NULL) {
577 		err = got_error_from_errno();
578 		goto done;
579 	}
580 	author = author0;
581 	smallerthan = strchr(author, '<');
582 	if (smallerthan)
583 		*smallerthan = '\0';
584 	else {
585 		char *at = strchr(author, '@');
586 		if (at)
587 			*at = '\0';
588 	}
589 	limit = avail - col;
590 	err = format_line(&wauthor, &author_width, author, limit);
591 	if (err)
592 		goto done;
593 	waddwstr(view->window, wauthor);
594 	col += author_width;
595 	while (col <= avail && author_width < author_display_cols + 1) {
596 		waddch(view->window, ' ');
597 		col++;
598 		author_width++;
599 	}
600 	if (col > avail)
601 		goto done;
602 
603 	logmsg0 = strdup(commit->logmsg);
604 	if (logmsg0 == NULL) {
605 		err = got_error_from_errno();
606 		goto done;
607 	}
608 	logmsg = logmsg0;
609 	while (*logmsg == '\n')
610 		logmsg++;
611 	newline = strchr(logmsg, '\n');
612 	if (newline)
613 		*newline = '\0';
614 	limit = avail - col;
615 	err = format_line(&wlogmsg, &logmsg_width, logmsg, limit);
616 	if (err)
617 		goto done;
618 	waddwstr(view->window, wlogmsg);
619 	col += logmsg_width;
620 	while (col <= avail) {
621 		waddch(view->window, ' ');
622 		col++;
623 	}
624 done:
625 	free(logmsg0);
626 	free(wlogmsg);
627 	free(author0);
628 	free(wauthor);
629 	free(line);
630 	return err;
631 }
632 
633 static struct commit_queue_entry *
634 alloc_commit_queue_entry(struct got_commit_object *commit,
635     struct got_object_id *id)
636 {
637 	struct commit_queue_entry *entry;
638 
639 	entry = calloc(1, sizeof(*entry));
640 	if (entry == NULL)
641 		return NULL;
642 
643 	entry->id = id;
644 	entry->commit = commit;
645 	return entry;
646 }
647 
648 static void
649 pop_commit(struct commit_queue *commits)
650 {
651 	struct commit_queue_entry *entry;
652 
653 	entry = TAILQ_FIRST(&commits->head);
654 	TAILQ_REMOVE(&commits->head, entry, entry);
655 	got_object_commit_close(entry->commit);
656 	commits->ncommits--;
657 	/* Don't free entry->id! It is owned by the commit graph. */
658 	free(entry);
659 }
660 
661 static void
662 free_commits(struct commit_queue *commits)
663 {
664 	while (!TAILQ_EMPTY(&commits->head))
665 		pop_commit(commits);
666 }
667 
668 static const struct got_error *
669 queue_commits(struct got_commit_graph *graph, struct commit_queue *commits,
670     struct got_object_id *start_id, int minqueue, int init,
671     struct got_repository *repo, const char *path)
672 {
673 	const struct got_error *err = NULL;
674 	struct got_object_id *id;
675 	struct commit_queue_entry *entry;
676 	int nfetched, nqueued = 0, found_obj = 0;
677 	int is_root_path = strcmp(path, "/") == 0;
678 
679 	err = got_commit_graph_iter_start(graph, start_id);
680 	if (err)
681 		return err;
682 
683 	entry = TAILQ_LAST(&commits->head, commit_queue_head);
684 	if (entry && got_object_id_cmp(entry->id, start_id) == 0) {
685 		int nfetched;
686 
687 		/* Start ID's commit is already on the queue; skip over it. */
688 		err = got_commit_graph_iter_next(&id, graph);
689 		if (err && err->code != GOT_ERR_ITER_NEED_MORE)
690 			return err;
691 
692 		err = got_commit_graph_fetch_commits(&nfetched, graph, 1, repo);
693 		if (err)
694 			return err;
695 	}
696 
697 	while (1) {
698 		struct got_commit_object *commit;
699 
700 		err = got_commit_graph_iter_next(&id, graph);
701 		if (err) {
702 			if (err->code != GOT_ERR_ITER_NEED_MORE)
703 				break;
704 			if (nqueued >= minqueue) {
705 				err = NULL;
706 				break;
707 			}
708 			err = got_commit_graph_fetch_commits(&nfetched,
709 			    graph, 1, repo);
710 			if (err)
711 				return err;
712 			continue;
713 		}
714 		if (id == NULL)
715 			break;
716 
717 		err = got_object_open_as_commit(&commit, repo, id);
718 		if (err)
719 			break;
720 
721 		if (!is_root_path) {
722 			struct got_object *obj;
723 			struct got_object_qid *pid;
724 			int changed = 0;
725 
726 			err = got_object_open_by_path(&obj, repo, id, path);
727 			if (err) {
728 				got_object_commit_close(commit);
729 				if (err->code == GOT_ERR_NO_OBJ &&
730 				    (found_obj || !init)) {
731 					/* History stops here. */
732 					err = got_error(GOT_ERR_ITER_COMPLETED);
733 				}
734 				break;
735 			}
736 			found_obj = 1;
737 
738 			pid = SIMPLEQ_FIRST(&commit->parent_ids);
739 			if (pid != NULL) {
740 				struct got_object *pobj;
741 				err = got_object_open_by_path(&pobj, repo,
742 				    pid->id, path);
743 				if (err) {
744 					if (err->code != GOT_ERR_NO_OBJ) {
745 						got_object_close(obj);
746 						got_object_commit_close(commit);
747 						break;
748 					}
749 					err = NULL;
750 					changed = 1;
751 				} else {
752 					struct got_object_id *id, *pid;
753 					id = got_object_get_id(obj);
754 					if (id == NULL) {
755 						err = got_error_from_errno();
756 						got_object_close(obj);
757 						got_object_close(pobj);
758 						break;
759 					}
760 					pid = got_object_get_id(pobj);
761 					if (pid == NULL) {
762 						err = got_error_from_errno();
763 						free(id);
764 						got_object_close(obj);
765 						got_object_close(pobj);
766 						break;
767 					}
768 					changed =
769 					    (got_object_id_cmp(id, pid) != 0);
770 					got_object_close(pobj);
771 					free(id);
772 					free(pid);
773 				}
774 			}
775 			got_object_close(obj);
776 			if (!changed) {
777 				got_object_commit_close(commit);
778 				continue;
779 			}
780 		}
781 
782 		entry = alloc_commit_queue_entry(commit, id);
783 		if (entry == NULL) {
784 			err = got_error_from_errno();
785 			break;
786 		}
787 		TAILQ_INSERT_TAIL(&commits->head, entry, entry);
788 		nqueued++;
789 		commits->ncommits++;
790 	}
791 
792 	return err;
793 }
794 
795 static const struct got_error *
796 fetch_next_commit(struct commit_queue_entry **pentry,
797     struct commit_queue_entry *entry, struct commit_queue *commits,
798     struct got_commit_graph *graph, struct got_repository *repo,
799     const char *path)
800 {
801 	const struct got_error *err = NULL;
802 
803 	*pentry = NULL;
804 
805 	err = queue_commits(graph, commits, entry->id, 1, 0, repo, path);
806 	if (err)
807 		return err;
808 
809 	/* Next entry to display should now be available. */
810 	*pentry = TAILQ_NEXT(entry, entry);
811 	if (*pentry == NULL)
812 		return got_error(GOT_ERR_NO_OBJ);
813 
814 	return NULL;
815 }
816 
817 static const struct got_error *
818 get_head_commit_id(struct got_object_id **head_id, struct got_repository *repo)
819 {
820 	const struct got_error *err = NULL;
821 	struct got_reference *head_ref;
822 
823 	*head_id = NULL;
824 
825 	err = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
826 	if (err)
827 		return err;
828 
829 	err = got_ref_resolve(head_id, repo, head_ref);
830 	got_ref_close(head_ref);
831 	if (err) {
832 		*head_id = NULL;
833 		return err;
834 	}
835 
836 	return NULL;
837 }
838 
839 static const struct got_error *
840 draw_commits(struct tog_view *view, struct commit_queue_entry **last,
841     struct commit_queue_entry **selected, struct commit_queue_entry *first,
842     struct commit_queue *commits, int selected_idx, int limit,
843     struct got_commit_graph *graph, struct got_repository *repo,
844     const char *path)
845 {
846 	const struct got_error *err = NULL;
847 	struct commit_queue_entry *entry;
848 	int ncommits, width;
849 	char *id_str, *header;
850 	wchar_t *wline;
851 
852 	entry = first;
853 	ncommits = 0;
854 	while (entry) {
855 		if (ncommits == selected_idx) {
856 			*selected = entry;
857 			break;
858 		}
859 		entry = TAILQ_NEXT(entry, entry);
860 		ncommits++;
861 	}
862 
863 	err = got_object_id_str(&id_str, (*selected)->id);
864 	if (err)
865 		return err;
866 
867 	if (path && strcmp(path, "/") != 0) {
868 		if (asprintf(&header, "commit: %s [%s]", id_str, path) == -1) {
869 			err = got_error_from_errno();
870 			free(id_str);
871 			return err;
872 		}
873 	} else if (asprintf(&header, "commit: %s", id_str) == -1) {
874 		err = got_error_from_errno();
875 		free(id_str);
876 		return err;
877 	}
878 	free(id_str);
879 	err = format_line(&wline, &width, header, view->ncols);
880 	if (err) {
881 		free(header);
882 		return err;
883 	}
884 	free(header);
885 
886 	werase(view->window);
887 
888 	waddwstr(view->window, wline);
889 	if (width < view->ncols)
890 		waddch(view->window, '\n');
891 	free(wline);
892 	if (limit <= 1)
893 		return NULL;
894 
895 	entry = first;
896 	*last = first;
897 	ncommits = 0;
898 	while (entry) {
899 		if (ncommits >= limit - 1)
900 			break;
901 		if (ncommits == selected_idx)
902 			wstandout(view->window);
903 		err = draw_commit(view, entry->commit, entry->id);
904 		if (ncommits == selected_idx)
905 			wstandend(view->window);
906 		if (err)
907 			break;
908 		ncommits++;
909 		*last = entry;
910 		if (entry == TAILQ_LAST(&commits->head, commit_queue_head)) {
911 			err = queue_commits(graph, commits, entry->id, 1,
912 			    0, repo, path);
913 			if (err) {
914 				if (err->code != GOT_ERR_ITER_COMPLETED)
915 					return err;
916 				err = NULL;
917 			}
918 		}
919 		entry = TAILQ_NEXT(entry, entry);
920 	}
921 
922 	update_panels();
923 
924 	return err;
925 }
926 
927 static void
928 scroll_up(struct commit_queue_entry **first_displayed_entry, int maxscroll,
929     struct commit_queue *commits)
930 {
931 	struct commit_queue_entry *entry;
932 	int nscrolled = 0;
933 
934 	entry = TAILQ_FIRST(&commits->head);
935 	if (*first_displayed_entry == entry)
936 		return;
937 
938 	entry = *first_displayed_entry;
939 	while (entry && nscrolled < maxscroll) {
940 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
941 		if (entry) {
942 			*first_displayed_entry = entry;
943 			nscrolled++;
944 		}
945 	}
946 }
947 
948 static const struct got_error *
949 scroll_down(struct commit_queue_entry **first_displayed_entry, int maxscroll,
950     struct commit_queue_entry *last_displayed_entry,
951     struct commit_queue *commits, struct got_commit_graph *graph,
952     struct got_repository *repo, const char *path)
953 {
954 	const struct got_error *err = NULL;
955 	struct commit_queue_entry *pentry;
956 	int nscrolled = 0;
957 
958 	do {
959 		pentry = TAILQ_NEXT(last_displayed_entry, entry);
960 		if (pentry == NULL) {
961 			err = fetch_next_commit(&pentry, last_displayed_entry,
962 			    commits, graph, repo, path);
963 			if (err || pentry == NULL)
964 				break;
965 		}
966 		last_displayed_entry = pentry;
967 
968 		pentry = TAILQ_NEXT(*first_displayed_entry, entry);
969 		if (pentry == NULL)
970 			break;
971 		*first_displayed_entry = pentry;
972 	} while (++nscrolled < maxscroll);
973 
974 	return err;
975 }
976 
977 static const struct got_error *
978 show_commit(struct tog_view **new_view, struct tog_view *parent_view,
979     struct commit_queue_entry *entry, struct got_repository *repo)
980 {
981 	const struct got_error *err;
982 	struct got_object *obj1 = NULL, *obj2 = NULL;
983 	struct got_object_qid *parent_id;
984 	struct tog_view *diff_view;
985 
986 	err = got_object_open(&obj2, repo, entry->id);
987 	if (err)
988 		return err;
989 
990 	parent_id = SIMPLEQ_FIRST(&entry->commit->parent_ids);
991 	if (parent_id) {
992 		err = got_object_open(&obj1, repo, parent_id->id);
993 		if (err)
994 			goto done;
995 	}
996 
997 	diff_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_DIFF);
998 	if (diff_view == NULL) {
999 		err = got_error_from_errno();
1000 		goto done;
1001 	}
1002 
1003 	err = open_diff_view(diff_view, obj1, obj2, repo);
1004 	if (err == NULL)
1005 		*new_view = diff_view;
1006 done:
1007 	if (obj1)
1008 		got_object_close(obj1);
1009 	if (obj2)
1010 		got_object_close(obj2);
1011 	return err;
1012 }
1013 
1014 static const struct got_error *
1015 browse_commit(struct tog_view **new_view, struct tog_view *parent_view,
1016     struct commit_queue_entry *entry, struct got_repository *repo)
1017 {
1018 	const struct got_error *err = NULL;
1019 	struct got_tree_object *tree;
1020 	struct tog_view *tree_view;
1021 
1022 	err = got_object_open_as_tree(&tree, repo, entry->commit->tree_id);
1023 	if (err)
1024 		return err;
1025 
1026 	tree_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_TREE);
1027 	if (tree_view == NULL)
1028 		return got_error_from_errno();
1029 
1030 	err = open_tree_view(tree_view, tree, entry->id, repo);
1031 	if (err)
1032 		got_object_tree_close(tree);
1033 	else
1034 		*new_view = tree_view;
1035 	return err;
1036 }
1037 
1038 static const struct got_error *
1039 open_log_view(struct tog_view *view, struct got_object_id *start_id,
1040     struct got_repository *repo, const char *path)
1041 {
1042 	const struct got_error *err = NULL;
1043 	struct got_object_id *head_id = NULL;
1044 	int nfetched;
1045 	struct tog_log_view_state *s = &view->state.log;
1046 
1047 	err = got_repo_map_path(&s->in_repo_path, repo, path);
1048 	if (err != NULL)
1049 		goto done;
1050 
1051 	err = get_head_commit_id(&head_id, repo);
1052 	if (err)
1053 		return err;
1054 
1055 	/* The graph contains all commits. */
1056 	err = got_commit_graph_open(&s->graph, head_id, 0, repo);
1057 	if (err)
1058 		goto done;
1059 	/* The commit queue contains a subset of commits filtered by path. */
1060 	TAILQ_INIT(&s->commits.head);
1061 	s->commits.ncommits = 0;
1062 
1063 	/* Populate commit graph with a sufficient number of commits. */
1064 	err = got_commit_graph_fetch_commits_up_to(&nfetched, s->graph,
1065 	    start_id, repo);
1066 	if (err)
1067 		goto done;
1068 
1069 	/*
1070 	 * Open the initial batch of commits, sorted in commit graph order.
1071 	 * We keep all commits open throughout the lifetime of the log view
1072 	 * in order to avoid having to re-fetch commits from disk while
1073 	 * updating the display.
1074 	 */
1075 	err = queue_commits(s->graph, &s->commits, start_id, view->nlines, 1,
1076 	    repo, s->in_repo_path);
1077 	if (err) {
1078 		if (err->code != GOT_ERR_ITER_COMPLETED)
1079 			goto done;
1080 		err = NULL;
1081 	}
1082 
1083 	s->first_displayed_entry =
1084 	    TAILQ_FIRST(&s->commits.head);
1085 	s->selected_entry = s->first_displayed_entry;
1086 	s->repo = repo;
1087 
1088 	view->show = show_log_view;
1089 	view->input = input_log_view;
1090 	view->close = close_log_view;
1091 done:
1092 	free(head_id);
1093 	return err;
1094 }
1095 
1096 static const struct got_error *
1097 close_log_view(struct tog_view *view)
1098 {
1099 	struct tog_log_view_state *s = &view->state.log;
1100 
1101 	if (s->graph)
1102 		got_commit_graph_close(s->graph);
1103 	free_commits(&s->commits);
1104 	free(s->in_repo_path);
1105 	return NULL;
1106 }
1107 
1108 static const struct got_error *
1109 show_log_view(struct tog_view *view)
1110 {
1111 	struct tog_log_view_state *s = &view->state.log;
1112 
1113 	return draw_commits(view, &s->last_displayed_entry,
1114 	    &s->selected_entry, s->first_displayed_entry,
1115 	    &s->commits, s->selected, view->nlines, s->graph,
1116 	    s->repo, s->in_repo_path);
1117 }
1118 
1119 static const struct got_error *
1120 input_log_view(struct tog_view **new_view, struct tog_view **dead_view,
1121     struct tog_view *view, int ch)
1122 {
1123 	const struct got_error *err = NULL;
1124 	struct tog_log_view_state *s = &view->state.log;
1125 
1126 	switch (ch) {
1127 		case 'k':
1128 		case KEY_UP:
1129 			if (s->selected > 0)
1130 				s->selected--;
1131 			if (s->selected > 0)
1132 				break;
1133 			scroll_up(&s->first_displayed_entry, 1,
1134 			    &s->commits);
1135 			break;
1136 		case KEY_PPAGE:
1137 			if (TAILQ_FIRST(&s->commits.head) ==
1138 			    s->first_displayed_entry) {
1139 				s->selected = 0;
1140 				break;
1141 			}
1142 			scroll_up(&s->first_displayed_entry,
1143 			    view->nlines, &s->commits);
1144 			break;
1145 		case 'j':
1146 		case KEY_DOWN:
1147 			if (s->selected < MIN(view->nlines - 2,
1148 			    s->commits.ncommits - 1)) {
1149 				s->selected++;
1150 				break;
1151 			}
1152 			err = scroll_down(&s->first_displayed_entry, 1,
1153 			    s->last_displayed_entry, &s->commits,
1154 			    s->graph, s->repo, s->in_repo_path);
1155 			if (err) {
1156 				if (err->code != GOT_ERR_ITER_COMPLETED)
1157 					break;
1158 				err = NULL;
1159 			}
1160 			break;
1161 		case KEY_NPAGE: {
1162 			struct commit_queue_entry *first;
1163 			first = s->first_displayed_entry;
1164 			err = scroll_down(&s->first_displayed_entry,
1165 			    view->nlines, s->last_displayed_entry,
1166 			    &s->commits, s->graph, s->repo,
1167 			    s->in_repo_path);
1168 			if (err == NULL)
1169 				break;
1170 			if (err->code != GOT_ERR_ITER_COMPLETED)
1171 				break;
1172 			if (first == s->first_displayed_entry &&
1173 			    s->selected < MIN(view->nlines - 2,
1174 			    s->commits.ncommits - 1)) {
1175 				/* can't scroll further down */
1176 				s->selected = MIN(view->nlines - 2,
1177 				    s->commits.ncommits - 1);
1178 			}
1179 			err = NULL;
1180 			break;
1181 		}
1182 		case KEY_RESIZE:
1183 			if (s->selected > view->nlines - 2)
1184 				s->selected = view->nlines - 2;
1185 			if (s->selected > s->commits.ncommits - 1)
1186 				s->selected = s->commits.ncommits - 1;
1187 			break;
1188 		case KEY_ENTER:
1189 		case '\r':
1190 			err = show_commit(new_view, view, s->selected_entry,
1191 			    s->repo);
1192 			break;
1193 		case 't':
1194 			err = browse_commit(new_view, view, s->selected_entry,
1195 			    s->repo);
1196 			break;
1197 		default:
1198 			break;
1199 	}
1200 
1201 	return err;
1202 }
1203 
1204 static const struct got_error *
1205 cmd_log(int argc, char *argv[])
1206 {
1207 	const struct got_error *error;
1208 	struct got_repository *repo = NULL;
1209 	struct got_object_id *start_id = NULL;
1210 	char *path = NULL, *repo_path = NULL, *cwd = NULL;
1211 	char *start_commit = NULL;
1212 	int ch;
1213 	struct tog_view *view;
1214 
1215 #ifndef PROFILE
1216 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
1217 		err(1, "pledge");
1218 #endif
1219 
1220 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
1221 		switch (ch) {
1222 		case 'c':
1223 			start_commit = optarg;
1224 			break;
1225 		case 'r':
1226 			repo_path = realpath(optarg, NULL);
1227 			if (repo_path == NULL)
1228 				err(1, "-r option");
1229 			break;
1230 		default:
1231 			usage();
1232 			/* NOTREACHED */
1233 		}
1234 	}
1235 
1236 	argc -= optind;
1237 	argv += optind;
1238 
1239 	if (argc == 0)
1240 		path = strdup("");
1241 	else if (argc == 1)
1242 		path = strdup(argv[0]);
1243 	else
1244 		usage_log();
1245 	if (path == NULL)
1246 		return got_error_from_errno();
1247 
1248 	cwd = getcwd(NULL, 0);
1249 	if (cwd == NULL) {
1250 		error = got_error_from_errno();
1251 		goto done;
1252 	}
1253 	if (repo_path == NULL) {
1254 		repo_path = strdup(cwd);
1255 		if (repo_path == NULL) {
1256 			error = got_error_from_errno();
1257 			goto done;
1258 		}
1259 	}
1260 
1261 	error = got_repo_open(&repo, repo_path);
1262 	if (error != NULL)
1263 		goto done;
1264 
1265 	if (start_commit == NULL) {
1266 		error = get_head_commit_id(&start_id, repo);
1267 		if (error != NULL)
1268 			goto done;
1269 	} else {
1270 		struct got_object *obj;
1271 		error = got_object_open_by_id_str(&obj, repo, start_commit);
1272 		if (error == NULL) {
1273 			start_id = got_object_get_id(obj);
1274 			if (start_id == NULL)
1275 				error = got_error_from_errno();
1276 				goto done;
1277 		}
1278 	}
1279 	if (error != NULL)
1280 		goto done;
1281 
1282 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_LOG);
1283 	if (view == NULL) {
1284 		error = got_error_from_errno();
1285 		goto done;
1286 	}
1287 	error = open_log_view(view, start_id, repo, path);
1288 	if (error)
1289 		goto done;
1290 	error = view_loop(view);
1291 done:
1292 	free(repo_path);
1293 	free(cwd);
1294 	free(path);
1295 	free(start_id);
1296 	if (repo)
1297 		got_repo_close(repo);
1298 	return error;
1299 }
1300 
1301 __dead static void
1302 usage_diff(void)
1303 {
1304 	endwin();
1305 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
1306 	    getprogname());
1307 	exit(1);
1308 }
1309 
1310 static char *
1311 parse_next_line(FILE *f, size_t *len)
1312 {
1313 	char *line;
1314 	size_t linelen;
1315 	size_t lineno;
1316 	const char delim[3] = { '\0', '\0', '\0'};
1317 
1318 	line = fparseln(f, &linelen, &lineno, delim, 0);
1319 	if (len)
1320 		*len = linelen;
1321 	return line;
1322 }
1323 
1324 static const struct got_error *
1325 draw_file(struct tog_view *view, FILE *f, int *first_displayed_line,
1326     int *last_displayed_line, int *eof, int max_lines)
1327 {
1328 	const struct got_error *err;
1329 	int nlines = 0, nprinted = 0;
1330 	char *line;
1331 	size_t len;
1332 	wchar_t *wline;
1333 	int width;
1334 
1335 	rewind(f);
1336 	werase(view->window);
1337 
1338 	*eof = 0;
1339 	while (nprinted < max_lines) {
1340 		line = parse_next_line(f, &len);
1341 		if (line == NULL) {
1342 			*eof = 1;
1343 			break;
1344 		}
1345 		if (++nlines < *first_displayed_line) {
1346 			free(line);
1347 			continue;
1348 		}
1349 
1350 		err = format_line(&wline, &width, line, view->ncols);
1351 		if (err) {
1352 			free(line);
1353 			free(wline);
1354 			return err;
1355 		}
1356 		waddwstr(view->window, wline);
1357 		if (width < view->ncols)
1358 			waddch(view->window, '\n');
1359 		if (++nprinted == 1)
1360 			*first_displayed_line = nlines;
1361 		free(line);
1362 		free(wline);
1363 		wline = NULL;
1364 	}
1365 	*last_displayed_line = nlines;
1366 
1367 	update_panels();
1368 
1369 	return NULL;
1370 }
1371 
1372 static const struct got_error *
1373 open_diff_view(struct tog_view *view, struct got_object *obj1,
1374     struct got_object *obj2, struct got_repository *repo)
1375 {
1376 	const struct got_error *err;
1377 	FILE *f;
1378 
1379 	if (obj1 != NULL && obj2 != NULL &&
1380 	    got_object_get_type(obj1) != got_object_get_type(obj2))
1381 		return got_error(GOT_ERR_OBJ_TYPE);
1382 
1383 	f = got_opentemp();
1384 	if (f == NULL)
1385 		return got_error_from_errno();
1386 
1387 	switch (got_object_get_type(obj1 ? obj1 : obj2)) {
1388 	case GOT_OBJ_TYPE_BLOB:
1389 		err = got_diff_objects_as_blobs(obj1, obj2, repo, f);
1390 		break;
1391 	case GOT_OBJ_TYPE_TREE:
1392 		err = got_diff_objects_as_trees(obj1, obj2, repo, f);
1393 		break;
1394 	case GOT_OBJ_TYPE_COMMIT:
1395 		err = got_diff_objects_as_commits(obj1, obj2, repo, f);
1396 		break;
1397 	default:
1398 		return got_error(GOT_ERR_OBJ_TYPE);
1399 	}
1400 
1401 	fflush(f);
1402 
1403 	view->state.diff.f = f;
1404 	view->state.diff.first_displayed_line = 1;
1405 	view->state.diff.last_displayed_line = view->nlines;
1406 
1407 	view->show = show_diff_view;
1408 	view->input = input_diff_view;
1409 	view->close = close_diff_view;
1410 
1411 	return NULL;
1412 }
1413 
1414 static const struct got_error *
1415 close_diff_view(struct tog_view *view)
1416 {
1417 	const struct got_error *err = NULL;
1418 
1419 	if (view->state.diff.f && fclose(view->state.diff.f) == EOF)
1420 		err = got_error_from_errno();
1421 
1422 	return err;
1423 }
1424 
1425 static const struct got_error *
1426 show_diff_view(struct tog_view *view)
1427 {
1428 	struct tog_diff_view_state *s = &view->state.diff;
1429 
1430 	return draw_file(view, s->f, &s->first_displayed_line,
1431 	    &s->last_displayed_line, &s->eof, view->nlines);
1432 }
1433 
1434 static const struct got_error *
1435 input_diff_view(struct tog_view **new, struct tog_view **dead,
1436     struct tog_view *view, int ch)
1437 {
1438 	struct tog_diff_view_state *s = &view->state.diff;
1439 	int i;
1440 
1441 	switch (ch) {
1442 		case 'k':
1443 		case KEY_UP:
1444 			if (s->first_displayed_line > 1)
1445 				s->first_displayed_line--;
1446 			break;
1447 		case KEY_PPAGE:
1448 			i = 0;
1449 			while (i++ < view->nlines - 1 &&
1450 			    s->first_displayed_line > 1)
1451 				s->first_displayed_line--;
1452 			break;
1453 		case 'j':
1454 		case KEY_DOWN:
1455 			if (!s->eof)
1456 				s->first_displayed_line++;
1457 			break;
1458 		case KEY_NPAGE:
1459 		case ' ':
1460 			i = 0;
1461 			while (!s->eof && i++ < view->nlines - 1) {
1462 				char *line;
1463 				line = parse_next_line(s->f, NULL);
1464 				s->first_displayed_line++;
1465 				if (line == NULL)
1466 					break;
1467 			}
1468 			break;
1469 		default:
1470 			break;
1471 	}
1472 
1473 	return NULL;
1474 }
1475 
1476 static const struct got_error *
1477 cmd_diff(int argc, char *argv[])
1478 {
1479 	const struct got_error *error = NULL;
1480 	struct got_repository *repo = NULL;
1481 	struct got_object *obj1 = NULL, *obj2 = NULL;
1482 	char *repo_path = NULL;
1483 	char *obj_id_str1 = NULL, *obj_id_str2 = NULL;
1484 	int ch;
1485 	struct tog_view *view;
1486 
1487 #ifndef PROFILE
1488 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
1489 		err(1, "pledge");
1490 #endif
1491 
1492 	while ((ch = getopt(argc, argv, "")) != -1) {
1493 		switch (ch) {
1494 		default:
1495 			usage();
1496 			/* NOTREACHED */
1497 		}
1498 	}
1499 
1500 	argc -= optind;
1501 	argv += optind;
1502 
1503 	if (argc == 0) {
1504 		usage_diff(); /* TODO show local worktree changes */
1505 	} else if (argc == 2) {
1506 		repo_path = getcwd(NULL, 0);
1507 		if (repo_path == NULL)
1508 			return got_error_from_errno();
1509 		obj_id_str1 = argv[0];
1510 		obj_id_str2 = argv[1];
1511 	} else if (argc == 3) {
1512 		repo_path = realpath(argv[0], NULL);
1513 		if (repo_path == NULL)
1514 			return got_error_from_errno();
1515 		obj_id_str1 = argv[1];
1516 		obj_id_str2 = argv[2];
1517 	} else
1518 		usage_diff();
1519 
1520 	error = got_repo_open(&repo, repo_path);
1521 	free(repo_path);
1522 	if (error)
1523 		goto done;
1524 
1525 	error = got_object_open_by_id_str(&obj1, repo, obj_id_str1);
1526 	if (error)
1527 		goto done;
1528 
1529 	error = got_object_open_by_id_str(&obj2, repo, obj_id_str2);
1530 	if (error)
1531 		goto done;
1532 
1533 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_DIFF);
1534 	if (view == NULL) {
1535 		error = got_error_from_errno();
1536 		goto done;
1537 	}
1538 	error = open_diff_view(view, obj1, obj2, repo);
1539 	if (error)
1540 		goto done;
1541 	error = view_loop(view);
1542 done:
1543 	got_repo_close(repo);
1544 	if (obj1)
1545 		got_object_close(obj1);
1546 	if (obj2)
1547 		got_object_close(obj2);
1548 	return error;
1549 }
1550 
1551 __dead static void
1552 usage_blame(void)
1553 {
1554 	endwin();
1555 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
1556 	    getprogname());
1557 	exit(1);
1558 }
1559 
1560 struct tog_blame_line {
1561 	int annotated;
1562 	struct got_object_id *id;
1563 };
1564 
1565 static const struct got_error *
1566 draw_blame(struct tog_view *view, struct got_object_id *id, FILE *f,
1567     const char *path, struct tog_blame_line *lines, int nlines,
1568     int blame_complete, int selected_line, int *first_displayed_line,
1569     int *last_displayed_line, int *eof, int max_lines)
1570 {
1571 	const struct got_error *err;
1572 	int lineno = 0, nprinted = 0;
1573 	char *line;
1574 	size_t len;
1575 	wchar_t *wline;
1576 	int width, wlimit;
1577 	struct tog_blame_line *blame_line;
1578 	struct got_object_id *prev_id = NULL;
1579 	char *id_str;
1580 
1581 	err = got_object_id_str(&id_str, id);
1582 	if (err)
1583 		return err;
1584 
1585 	rewind(f);
1586 	werase(view->window);
1587 
1588 	if (asprintf(&line, "commit: %s", id_str) == -1) {
1589 		err = got_error_from_errno();
1590 		free(id_str);
1591 		return err;
1592 	}
1593 
1594 	err = format_line(&wline, &width, line, view->ncols);
1595 	free(line);
1596 	line = NULL;
1597 	waddwstr(view->window, wline);
1598 	free(wline);
1599 	wline = NULL;
1600 	if (width < view->ncols)
1601 		waddch(view->window, '\n');
1602 
1603 	if (asprintf(&line, "[%d/%d] %s%s",
1604 	    *first_displayed_line - 1 + selected_line, nlines,
1605 	    blame_complete ? "" : "annotating ", path) == -1) {
1606 		free(id_str);
1607 		return got_error_from_errno();
1608 	}
1609 	free(id_str);
1610 	err = format_line(&wline, &width, line, view->ncols);
1611 	free(line);
1612 	line = NULL;
1613 	if (err)
1614 		return err;
1615 	waddwstr(view->window, wline);
1616 	free(wline);
1617 	wline = NULL;
1618 	if (width < view->ncols)
1619 		waddch(view->window, '\n');
1620 
1621 	*eof = 0;
1622 	while (nprinted < max_lines - 2) {
1623 		line = parse_next_line(f, &len);
1624 		if (line == NULL) {
1625 			*eof = 1;
1626 			break;
1627 		}
1628 		if (++lineno < *first_displayed_line) {
1629 			free(line);
1630 			continue;
1631 		}
1632 
1633 		wlimit = view->ncols < 9 ? 0 : view->ncols - 9;
1634 		err = format_line(&wline, &width, line, wlimit);
1635 		if (err) {
1636 			free(line);
1637 			return err;
1638 		}
1639 
1640 		if (nprinted == selected_line - 1)
1641 			wstandout(view->window);
1642 
1643 		blame_line = &lines[lineno - 1];
1644 		if (blame_line->annotated && prev_id &&
1645 		    got_object_id_cmp(prev_id, blame_line->id) == 0)
1646 			waddstr(view->window, "         ");
1647 		else if (blame_line->annotated) {
1648 			char *id_str;
1649 			err = got_object_id_str(&id_str, blame_line->id);
1650 			if (err) {
1651 				free(line);
1652 				free(wline);
1653 				return err;
1654 			}
1655 			wprintw(view->window, "%.8s ", id_str);
1656 			free(id_str);
1657 			prev_id = blame_line->id;
1658 		} else {
1659 			waddstr(view->window, "........ ");
1660 			prev_id = NULL;
1661 		}
1662 
1663 		waddwstr(view->window, wline);
1664 		while (width < wlimit) {
1665 			waddch(view->window, ' ');
1666 			width++;
1667 		}
1668 		if (nprinted == selected_line - 1)
1669 			wstandend(view->window);
1670 		if (++nprinted == 1)
1671 			*first_displayed_line = lineno;
1672 		free(line);
1673 		free(wline);
1674 		wline = NULL;
1675 	}
1676 	*last_displayed_line = lineno;
1677 
1678 	update_panels();
1679 
1680 	return NULL;
1681 }
1682 
1683 static const struct got_error *
1684 blame_cb(void *arg, int nlines, int lineno, struct got_object_id *id)
1685 {
1686 	const struct got_error *err = NULL;
1687 	struct tog_blame_cb_args *a = arg;
1688 	struct tog_blame_line *line;
1689 
1690 	if (nlines != a->nlines ||
1691 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1692 		return got_error(GOT_ERR_RANGE);
1693 
1694 	if (pthread_mutex_lock(a->mutex) != 0)
1695 		return got_error_from_errno();
1696 
1697 	if (*a->quit) {	/* user has quit the blame view */
1698 		err = got_error(GOT_ERR_ITER_COMPLETED);
1699 		goto done;
1700 	}
1701 
1702 	if (lineno == -1)
1703 		goto done; /* no change in this commit */
1704 
1705 	line = &a->lines[lineno - 1];
1706 	if (line->annotated)
1707 		goto done;
1708 
1709 	line->id = got_object_id_dup(id);
1710 	if (line->id == NULL) {
1711 		err = got_error_from_errno();
1712 		goto done;
1713 	}
1714 	line->annotated = 1;
1715 
1716 	err = draw_blame(a->view, a->commit_id, a->f, a->path,
1717 	    a->lines, a->nlines, 0, *a->selected_line, a->first_displayed_line,
1718 	    a->last_displayed_line, a->eof, a->view->nlines);
1719 done:
1720 	if (pthread_mutex_unlock(a->mutex) != 0)
1721 		return got_error_from_errno();
1722 	return err;
1723 }
1724 
1725 static void *
1726 blame_thread(void *arg)
1727 {
1728 	const struct got_error *err;
1729 	struct tog_blame_thread_args *ta = arg;
1730 	struct tog_blame_cb_args *a = ta->cb_args;
1731 
1732 	err = got_blame_incremental(ta->path, a->commit_id, ta->repo,
1733 	    blame_cb, ta->cb_args);
1734 
1735 	if (pthread_mutex_lock(a->mutex) != 0)
1736 		return (void *)got_error_from_errno();
1737 
1738 	got_repo_close(ta->repo);
1739 	ta->repo = NULL;
1740 	*ta->complete = 1;
1741 	if (!err)
1742 		err = draw_blame(a->view, a->commit_id, a->f, a->path,
1743 		    a->lines, a->nlines, 1, *a->selected_line,
1744 		    a->first_displayed_line, a->last_displayed_line, a->eof,
1745 		    a->view->nlines);
1746 
1747 	if (pthread_mutex_unlock(a->mutex) != 0 && err == NULL)
1748 		err = got_error_from_errno();
1749 
1750 	return (void *)err;
1751 }
1752 
1753 static struct got_object_id *
1754 get_selected_commit_id(struct tog_blame_line *lines,
1755     int first_displayed_line, int selected_line)
1756 {
1757 	struct tog_blame_line *line;
1758 
1759 	line = &lines[first_displayed_line - 1 + selected_line - 1];
1760 	if (!line->annotated)
1761 		return NULL;
1762 
1763 	return line->id;
1764 }
1765 
1766 static const struct got_error *
1767 open_selected_commit(struct got_object **pobj, struct got_object **obj,
1768     struct tog_blame_line *lines, int first_displayed_line,
1769     int selected_line, struct got_repository *repo)
1770 {
1771 	const struct got_error *err = NULL;
1772 	struct got_commit_object *commit = NULL;
1773 	struct got_object_id *selected_id;
1774 	struct got_object_qid *pid;
1775 
1776 	*pobj = NULL;
1777 	*obj = NULL;
1778 
1779 	selected_id = get_selected_commit_id(lines,
1780 	    first_displayed_line, selected_line);
1781 	if (selected_id == NULL)
1782 		return NULL;
1783 
1784 	err = got_object_open(obj, repo, selected_id);
1785 	if (err)
1786 		goto done;
1787 
1788 	err = got_object_commit_open(&commit, repo, *obj);
1789 	if (err)
1790 		goto done;
1791 
1792 	pid = SIMPLEQ_FIRST(&commit->parent_ids);
1793 	if (pid) {
1794 		err = got_object_open(pobj, repo, pid->id);
1795 		if (err)
1796 			goto done;
1797 	}
1798 done:
1799 	if (commit)
1800 		got_object_commit_close(commit);
1801 	return err;
1802 }
1803 
1804 static const struct got_error *
1805 stop_blame(struct tog_blame *blame)
1806 {
1807 	const struct got_error *err = NULL;
1808 	int i;
1809 
1810 	if (blame->thread) {
1811 		if (pthread_join(blame->thread, (void **)&err) != 0)
1812 			err = got_error_from_errno();
1813 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
1814 			err = NULL;
1815 		blame->thread = NULL;
1816 	}
1817 	if (blame->thread_args.repo) {
1818 		got_repo_close(blame->thread_args.repo);
1819 		blame->thread_args.repo = NULL;
1820 	}
1821 	if (blame->f) {
1822 		fclose(blame->f);
1823 		blame->f = NULL;
1824 	}
1825 	for (i = 0; i < blame->nlines; i++)
1826 		free(blame->lines[i].id);
1827 	free(blame->lines);
1828 	blame->lines = NULL;
1829 	free(blame->cb_args.commit_id);
1830 	blame->cb_args.commit_id = NULL;
1831 
1832 	return err;
1833 }
1834 
1835 static const struct got_error *
1836 run_blame(struct tog_blame *blame, pthread_mutex_t *mutex,
1837     struct tog_view *view, int *blame_complete,
1838     int *first_displayed_line, int *last_displayed_line,
1839     int *selected_line, int *done, int *eof, const char *path,
1840     struct got_object_id *commit_id,
1841     struct got_repository *repo)
1842 {
1843 	const struct got_error *err = NULL;
1844 	struct got_blob_object *blob = NULL;
1845 	struct got_repository *thread_repo = NULL;
1846 	struct got_object *obj;
1847 
1848 	err = got_object_open_by_path(&obj, repo, commit_id, path);
1849 	if (err)
1850 		goto done;
1851 	if (got_object_get_type(obj) != GOT_OBJ_TYPE_BLOB) {
1852 		err = got_error(GOT_ERR_OBJ_TYPE);
1853 		goto done;
1854 	}
1855 
1856 	err = got_object_blob_open(&blob, repo, obj, 8192);
1857 	if (err)
1858 		goto done;
1859 	blame->f = got_opentemp();
1860 	if (blame->f == NULL) {
1861 		err = got_error_from_errno();
1862 		goto done;
1863 	}
1864 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
1865 	    blame->f, blob);
1866 	if (err)
1867 		goto done;
1868 
1869 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
1870 	if (blame->lines == NULL) {
1871 		err = got_error_from_errno();
1872 		goto done;
1873 	}
1874 
1875 	err = got_repo_open(&thread_repo, got_repo_get_path(repo));
1876 	if (err)
1877 		goto done;
1878 
1879 	blame->cb_args.view = view;
1880 	blame->cb_args.lines = blame->lines;
1881 	blame->cb_args.nlines = blame->nlines;
1882 	blame->cb_args.mutex = mutex;
1883 	blame->cb_args.commit_id = got_object_id_dup(commit_id);
1884 	if (blame->cb_args.commit_id == NULL) {
1885 		err = got_error_from_errno();
1886 		goto done;
1887 	}
1888 	blame->cb_args.f = blame->f;
1889 	blame->cb_args.path = path;
1890 	blame->cb_args.first_displayed_line = first_displayed_line;
1891 	blame->cb_args.selected_line = selected_line;
1892 	blame->cb_args.last_displayed_line = last_displayed_line;
1893 	blame->cb_args.quit = done;
1894 	blame->cb_args.eof = eof;
1895 
1896 	blame->thread_args.path = path;
1897 	blame->thread_args.repo = thread_repo;
1898 	blame->thread_args.cb_args = &blame->cb_args;
1899 	blame->thread_args.complete = blame_complete;
1900 	*blame_complete = 0;
1901 
1902 	if (pthread_create(&blame->thread, NULL, blame_thread,
1903 	    &blame->thread_args) != 0) {
1904 		err = got_error_from_errno();
1905 		goto done;
1906 	}
1907 
1908 done:
1909 	if (blob)
1910 		got_object_blob_close(blob);
1911 	if (obj)
1912 		got_object_close(obj);
1913 	if (err)
1914 		stop_blame(blame);
1915 	return err;
1916 }
1917 
1918 static const struct got_error *
1919 open_blame_view(struct tog_view *view, char *path,
1920     struct got_object_id *commit_id, struct got_repository *repo)
1921 {
1922 	const struct got_error *err = NULL;
1923 	struct tog_blame_view_state *s = &view->state.blame;
1924 
1925 	SIMPLEQ_INIT(&s->blamed_commits);
1926 
1927 	if (pthread_mutex_init(&s->mutex, NULL) != 0)
1928 		return got_error_from_errno();
1929 
1930 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
1931 	if (err)
1932 		return err;
1933 
1934 	SIMPLEQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
1935 	s->first_displayed_line = 1;
1936 	s->last_displayed_line = view->nlines;
1937 	s->selected_line = 1;
1938 	s->blame_complete = 0;
1939 	s->path = path;
1940 	if (s->path == NULL)
1941 		return got_error_from_errno();
1942 	s->repo = repo;
1943 	s->commit_id = commit_id;
1944 	memset(&s->blame, 0, sizeof(s->blame));
1945 
1946 	view->show = show_blame_view;
1947 	view->input = input_blame_view;
1948 	view->close = close_blame_view;
1949 
1950 	return run_blame(&s->blame, &s->mutex, view, &s->blame_complete,
1951 	    &s->first_displayed_line, &s->last_displayed_line,
1952 	    &s->selected_line, &s->done, &s->eof, s->path,
1953 	    s->blamed_commit->id, s->repo);
1954 }
1955 
1956 static const struct got_error *
1957 close_blame_view(struct tog_view *view)
1958 {
1959 	const struct got_error *err = NULL;
1960 	struct tog_blame_view_state *s = &view->state.blame;
1961 
1962 	if (s->blame.thread)
1963 		err = stop_blame(&s->blame);
1964 
1965 	while (!SIMPLEQ_EMPTY(&s->blamed_commits)) {
1966 		struct got_object_qid *blamed_commit;
1967 		blamed_commit = SIMPLEQ_FIRST(&s->blamed_commits);
1968 		SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
1969 		got_object_qid_free(blamed_commit);
1970 	}
1971 
1972 	free(s->path);
1973 
1974 	return err;
1975 }
1976 
1977 static const struct got_error *
1978 show_blame_view(struct tog_view *view)
1979 {
1980 	const struct got_error *err = NULL;
1981 	struct tog_blame_view_state *s = &view->state.blame;
1982 
1983 	if (pthread_mutex_lock(&s->mutex) != 0)
1984 		return got_error_from_errno();
1985 
1986 	err = draw_blame(view, s->blamed_commit->id, s->blame.f,
1987 	    s->path, s->blame.lines, s->blame.nlines, s->blame_complete,
1988 	    s->selected_line, &s->first_displayed_line,
1989 	    &s->last_displayed_line, &s->eof, view->nlines);
1990 
1991 	if (pthread_mutex_unlock(&s->mutex) != 0 && err == NULL)
1992 		err = got_error_from_errno();
1993 
1994 	return err;
1995 }
1996 
1997 static const struct got_error *
1998 input_blame_view(struct tog_view **new_view, struct tog_view **dead_view,
1999     struct tog_view *view, int ch)
2000 {
2001 	const struct got_error *err = NULL, *thread_err = NULL;
2002 	struct got_object *obj = NULL, *pobj = NULL;
2003 	struct tog_view *diff_view;
2004 	struct tog_blame_view_state *s = &view->state.blame;
2005 
2006 	if (pthread_mutex_lock(&s->mutex) != 0) {
2007 		err = got_error_from_errno();
2008 		goto done;
2009 	}
2010 
2011 	switch (ch) {
2012 		case 'q':
2013 			s->done = 1;
2014 			if (pthread_mutex_unlock(&s->mutex) != 0) {
2015 				err = got_error_from_errno();
2016 				goto done;
2017 			}
2018 			return stop_blame(&s->blame);
2019 		case 'k':
2020 		case KEY_UP:
2021 			if (s->selected_line > 1)
2022 				s->selected_line--;
2023 			else if (s->selected_line == 1 &&
2024 			    s->first_displayed_line > 1)
2025 				s->first_displayed_line--;
2026 			break;
2027 		case KEY_PPAGE:
2028 			if (s->first_displayed_line == 1) {
2029 				s->selected_line = 1;
2030 				break;
2031 			}
2032 			if (s->first_displayed_line > view->nlines - 2)
2033 				s->first_displayed_line -=
2034 				    (view->nlines - 2);
2035 			else
2036 				s->first_displayed_line = 1;
2037 			break;
2038 		case 'j':
2039 		case KEY_DOWN:
2040 			if (s->selected_line < view->nlines - 2 &&
2041 			    s->first_displayed_line +
2042 			    s->selected_line <= s->blame.nlines)
2043 				s->selected_line++;
2044 			else if (s->last_displayed_line <
2045 			    s->blame.nlines)
2046 				s->first_displayed_line++;
2047 			break;
2048 		case 'b':
2049 		case 'p': {
2050 			struct got_object_id *id;
2051 			id = get_selected_commit_id(s->blame.lines,
2052 			    s->first_displayed_line, s->selected_line);
2053 			if (id == NULL || got_object_id_cmp(id,
2054 			    s->blamed_commit->id) == 0)
2055 				break;
2056 			err = open_selected_commit(&pobj, &obj,
2057 			    s->blame.lines, s->first_displayed_line,
2058 			    s->selected_line, s->repo);
2059 			if (err)
2060 				break;
2061 			if (pobj == NULL && obj == NULL)
2062 				break;
2063 			if (ch == 'p' && pobj == NULL)
2064 				break;
2065 			s->done = 1;
2066 			if (pthread_mutex_unlock(&s->mutex) != 0) {
2067 				err = got_error_from_errno();
2068 				goto done;
2069 			}
2070 			thread_err = stop_blame(&s->blame);
2071 			s->done = 0;
2072 			if (pthread_mutex_lock(&s->mutex) != 0) {
2073 				err = got_error_from_errno();
2074 				goto done;
2075 			}
2076 			if (thread_err)
2077 				break;
2078 			id = got_object_get_id(ch == 'b' ? obj : pobj);
2079 			got_object_close(obj);
2080 			obj = NULL;
2081 			if (pobj) {
2082 				got_object_close(pobj);
2083 				pobj = NULL;
2084 			}
2085 			if (id == NULL) {
2086 				err = got_error_from_errno();
2087 				break;
2088 			}
2089 			err = got_object_qid_alloc(
2090 			    &s->blamed_commit, id);
2091 			free(id);
2092 			if (err)
2093 				goto done;
2094 			SIMPLEQ_INSERT_HEAD(&s->blamed_commits,
2095 			    s->blamed_commit, entry);
2096 			err = run_blame(&s->blame, &s->mutex, view,
2097 			    &s->blame_complete,
2098 			    &s->first_displayed_line,
2099 			    &s->last_displayed_line,
2100 			    &s->selected_line, &s->done, &s->eof,
2101 			    s->path, s->blamed_commit->id, s->repo);
2102 			if (err)
2103 				break;
2104 			break;
2105 		}
2106 		case 'B': {
2107 			struct got_object_qid *first;
2108 			first = SIMPLEQ_FIRST(&s->blamed_commits);
2109 			if (!got_object_id_cmp(first->id, s->commit_id))
2110 				break;
2111 			s->done = 1;
2112 			if (pthread_mutex_unlock(&s->mutex) != 0) {
2113 				err = got_error_from_errno();
2114 				goto done;
2115 			}
2116 			thread_err = stop_blame(&s->blame);
2117 			s->done = 0;
2118 			if (pthread_mutex_lock(&s->mutex) != 0) {
2119 				err = got_error_from_errno();
2120 				goto done;
2121 			}
2122 			if (thread_err)
2123 				break;
2124 			SIMPLEQ_REMOVE_HEAD(&s->blamed_commits, entry);
2125 			got_object_qid_free(s->blamed_commit);
2126 			s->blamed_commit =
2127 			    SIMPLEQ_FIRST(&s->blamed_commits);
2128 			err = run_blame(&s->blame, &s->mutex, view,
2129 			    &s->blame_complete,
2130 			    &s->first_displayed_line,
2131 			    &s->last_displayed_line,
2132 			    &s->selected_line, &s->done, &s->eof, s->path,
2133 			    s->blamed_commit->id, s->repo);
2134 			if (err)
2135 				break;
2136 			break;
2137 		}
2138 		case KEY_ENTER:
2139 		case '\r':
2140 			err = open_selected_commit(&pobj, &obj,
2141 			    s->blame.lines, s->first_displayed_line,
2142 			    s->selected_line, s->repo);
2143 			if (err)
2144 				break;
2145 			if (pobj == NULL && obj == NULL)
2146 				break;
2147 			diff_view = view_open(0, 0, 0, 0, view,
2148 			    TOG_VIEW_DIFF);
2149 			if (diff_view == NULL) {
2150 				err = got_error_from_errno();
2151 				break;
2152 			}
2153 			err = open_diff_view(diff_view, pobj, obj,
2154 			    s->repo);
2155 			if (err) {
2156 				view_close(diff_view);
2157 				break;
2158 			}
2159 			*new_view = diff_view;
2160 			if (pobj) {
2161 				got_object_close(pobj);
2162 				pobj = NULL;
2163 			}
2164 			got_object_close(obj);
2165 			obj = NULL;
2166 			if (err)
2167 				break;
2168 			break;
2169 		case KEY_NPAGE:
2170 		case ' ':
2171 			if (s->last_displayed_line >= s->blame.nlines &&
2172 			    s->selected_line < view->nlines - 2) {
2173 				s->selected_line = MIN(s->blame.nlines,
2174 				    view->nlines - 2);
2175 				break;
2176 			}
2177 			if (s->last_displayed_line + view->nlines - 2
2178 			    <= s->blame.nlines)
2179 				s->first_displayed_line +=
2180 				    view->nlines - 2;
2181 			else
2182 				s->first_displayed_line =
2183 				    s->blame.nlines -
2184 				    (view->nlines - 3);
2185 			break;
2186 		case KEY_RESIZE:
2187 			if (s->selected_line > view->nlines - 2) {
2188 				s->selected_line = MIN(s->blame.nlines,
2189 				    view->nlines - 2);
2190 			}
2191 			break;
2192 		default:
2193 			break;
2194 	}
2195 
2196 	if (pthread_mutex_unlock(&s->mutex) != 0)
2197 		err = got_error_from_errno();
2198 done:
2199 	if (pobj)
2200 		got_object_close(pobj);
2201 	return thread_err ? thread_err : err;
2202 }
2203 
2204 static const struct got_error *
2205 cmd_blame(int argc, char *argv[])
2206 {
2207 	const struct got_error *error;
2208 	struct got_repository *repo = NULL;
2209 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
2210 	struct got_object_id *commit_id = NULL;
2211 	char *commit_id_str = NULL;
2212 	int ch;
2213 	struct tog_view *view;
2214 
2215 #ifndef PROFILE
2216 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
2217 		err(1, "pledge");
2218 #endif
2219 
2220 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
2221 		switch (ch) {
2222 		case 'c':
2223 			commit_id_str = optarg;
2224 			break;
2225 		case 'r':
2226 			repo_path = realpath(optarg, NULL);
2227 			if (repo_path == NULL)
2228 				err(1, "-r option");
2229 			break;
2230 		default:
2231 			usage();
2232 			/* NOTREACHED */
2233 		}
2234 	}
2235 
2236 	argc -= optind;
2237 	argv += optind;
2238 
2239 	if (argc == 1)
2240 		path = argv[0];
2241 	else
2242 		usage_blame();
2243 
2244 	cwd = getcwd(NULL, 0);
2245 	if (cwd == NULL) {
2246 		error = got_error_from_errno();
2247 		goto done;
2248 	}
2249 	if (repo_path == NULL) {
2250 		repo_path = strdup(cwd);
2251 		if (repo_path == NULL) {
2252 			error = got_error_from_errno();
2253 			goto done;
2254 		}
2255 	}
2256 
2257 
2258 	error = got_repo_open(&repo, repo_path);
2259 	if (error != NULL)
2260 		return error;
2261 
2262 	error = got_repo_map_path(&in_repo_path, repo, path);
2263 	if (error != NULL)
2264 		goto done;
2265 
2266 	if (commit_id_str == NULL) {
2267 		struct got_reference *head_ref;
2268 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
2269 		if (error != NULL)
2270 			goto done;
2271 		error = got_ref_resolve(&commit_id, repo, head_ref);
2272 		got_ref_close(head_ref);
2273 	} else {
2274 		struct got_object *obj;
2275 		error = got_object_open_by_id_str(&obj, repo, commit_id_str);
2276 		if (error != NULL)
2277 			goto done;
2278 		commit_id = got_object_get_id(obj);
2279 		if (commit_id == NULL)
2280 			error = got_error_from_errno();
2281 		got_object_close(obj);
2282 	}
2283 	if (error != NULL)
2284 		goto done;
2285 
2286 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_BLAME);
2287 	if (view == NULL) {
2288 		error = got_error_from_errno();
2289 		goto done;
2290 	}
2291 	error = open_blame_view(view, in_repo_path, commit_id, repo);
2292 	if (error)
2293 		goto done;
2294 	error = view_loop(view);
2295 done:
2296 	free(repo_path);
2297 	free(cwd);
2298 	free(commit_id);
2299 	if (repo)
2300 		got_repo_close(repo);
2301 	return error;
2302 }
2303 
2304 static const struct got_error *
2305 draw_tree_entries(struct tog_view *view,
2306     struct got_tree_entry **first_displayed_entry,
2307     struct got_tree_entry **last_displayed_entry,
2308     struct got_tree_entry **selected_entry, int *ndisplayed,
2309     const char *label, int show_ids, const char *parent_path,
2310     const struct got_tree_entries *entries, int selected, int limit, int isroot)
2311 {
2312 	const struct got_error *err = NULL;
2313 	struct got_tree_entry *te;
2314 	wchar_t *wline;
2315 	int width, n;
2316 
2317 	*ndisplayed = 0;
2318 
2319 	werase(view->window);
2320 
2321 	if (limit == 0)
2322 		return NULL;
2323 
2324 	err = format_line(&wline, &width, label, view->ncols);
2325 	if (err)
2326 		return err;
2327 	waddwstr(view->window, wline);
2328 	free(wline);
2329 	wline = NULL;
2330 	if (width < view->ncols)
2331 		waddch(view->window, '\n');
2332 	if (--limit <= 0)
2333 		return NULL;
2334 	err = format_line(&wline, &width, parent_path, view->ncols);
2335 	if (err)
2336 		return err;
2337 	waddwstr(view->window, wline);
2338 	free(wline);
2339 	wline = NULL;
2340 	if (width < view->ncols)
2341 		waddch(view->window, '\n');
2342 	if (--limit <= 0)
2343 		return NULL;
2344 	waddch(view->window, '\n');
2345 	if (--limit <= 0)
2346 		return NULL;
2347 
2348 	te = SIMPLEQ_FIRST(&entries->head);
2349 	if (*first_displayed_entry == NULL) {
2350 		if (selected == 0) {
2351 			wstandout(view->window);
2352 			*selected_entry = NULL;
2353 		}
2354 		waddstr(view->window, "  ..\n");	/* parent directory */
2355 		if (selected == 0)
2356 			wstandend(view->window);
2357 		(*ndisplayed)++;
2358 		if (--limit <= 0)
2359 			return NULL;
2360 		n = 1;
2361 	} else {
2362 		n = 0;
2363 		while (te != *first_displayed_entry)
2364 			te = SIMPLEQ_NEXT(te, entry);
2365 	}
2366 
2367 	while (te) {
2368 		char *line = NULL, *id_str = NULL;
2369 
2370 		if (show_ids) {
2371 			err = got_object_id_str(&id_str, te->id);
2372 			if (err)
2373 				return got_error_from_errno();
2374 		}
2375 		if (asprintf(&line, "%s  %s%s", id_str ? id_str : "",
2376 		    te->name, S_ISDIR(te->mode) ? "/" : "") == -1) {
2377 			free(id_str);
2378 			return got_error_from_errno();
2379 		}
2380 		free(id_str);
2381 		err = format_line(&wline, &width, line, view->ncols);
2382 		if (err) {
2383 			free(line);
2384 			break;
2385 		}
2386 		if (n == selected) {
2387 			wstandout(view->window);
2388 			*selected_entry = te;
2389 		}
2390 		waddwstr(view->window, wline);
2391 		if (width < view->ncols)
2392 			waddch(view->window, '\n');
2393 		if (n == selected)
2394 			wstandend(view->window);
2395 		free(line);
2396 		free(wline);
2397 		wline = NULL;
2398 		n++;
2399 		(*ndisplayed)++;
2400 		*last_displayed_entry = te;
2401 		if (--limit <= 0)
2402 			break;
2403 		te = SIMPLEQ_NEXT(te, entry);
2404 	}
2405 
2406 	return err;
2407 }
2408 
2409 static void
2410 tree_scroll_up(struct got_tree_entry **first_displayed_entry, int maxscroll,
2411     const struct got_tree_entries *entries, int isroot)
2412 {
2413 	struct got_tree_entry *te, *prev;
2414 	int i;
2415 
2416 	if (*first_displayed_entry == NULL)
2417 		return;
2418 
2419 	te = SIMPLEQ_FIRST(&entries->head);
2420 	if (*first_displayed_entry == te) {
2421 		if (!isroot)
2422 			*first_displayed_entry = NULL;
2423 		return;
2424 	}
2425 
2426 	/* XXX this is stupid... switch to TAILQ? */
2427 	for (i = 0; i < maxscroll; i++) {
2428 		while (te != *first_displayed_entry) {
2429 			prev = te;
2430 			te = SIMPLEQ_NEXT(te, entry);
2431 		}
2432 		*first_displayed_entry = prev;
2433 		te = SIMPLEQ_FIRST(&entries->head);
2434 	}
2435 	if (!isroot && te == SIMPLEQ_FIRST(&entries->head) && i < maxscroll)
2436 		*first_displayed_entry = NULL;
2437 }
2438 
2439 static void
2440 tree_scroll_down(struct got_tree_entry **first_displayed_entry, int maxscroll,
2441 	struct got_tree_entry *last_displayed_entry,
2442 	const struct got_tree_entries *entries)
2443 {
2444 	struct got_tree_entry *next;
2445 	int n = 0;
2446 
2447 	if (SIMPLEQ_NEXT(last_displayed_entry, entry) == NULL)
2448 		return;
2449 
2450 	if (*first_displayed_entry)
2451 		next = SIMPLEQ_NEXT(*first_displayed_entry, entry);
2452 	else
2453 		next = SIMPLEQ_FIRST(&entries->head);
2454 	while (next) {
2455 		*first_displayed_entry = next;
2456 		if (++n >= maxscroll)
2457 			break;
2458 		next = SIMPLEQ_NEXT(next, entry);
2459 	}
2460 }
2461 
2462 static const struct got_error *
2463 tree_entry_path(char **path, struct tog_parent_trees *parents,
2464     struct got_tree_entry *te)
2465 {
2466 	const struct got_error *err = NULL;
2467 	struct tog_parent_tree *pt;
2468 	size_t len = 2; /* for leading slash and NUL */
2469 
2470 	TAILQ_FOREACH(pt, parents, entry)
2471 		len += strlen(pt->selected_entry->name) + 1 /* slash */;
2472 	if (te)
2473 		len += strlen(te->name);
2474 
2475 	*path = calloc(1, len);
2476 	if (path == NULL)
2477 		return got_error_from_errno();
2478 
2479 	(*path)[0] = '/';
2480 	pt = TAILQ_LAST(parents, tog_parent_trees);
2481 	while (pt) {
2482 		if (strlcat(*path, pt->selected_entry->name, len) >= len) {
2483 			err = got_error(GOT_ERR_NO_SPACE);
2484 			goto done;
2485 		}
2486 		if (strlcat(*path, "/", len) >= len) {
2487 			err = got_error(GOT_ERR_NO_SPACE);
2488 			goto done;
2489 		}
2490 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
2491 	}
2492 	if (te) {
2493 		if (strlcat(*path, te->name, len) >= len) {
2494 			err = got_error(GOT_ERR_NO_SPACE);
2495 			goto done;
2496 		}
2497 	}
2498 done:
2499 	if (err) {
2500 		free(*path);
2501 		*path = NULL;
2502 	}
2503 	return err;
2504 }
2505 
2506 static const struct got_error *
2507 blame_tree_entry(struct tog_view **new_view, struct tog_view *parent_view,
2508     struct got_tree_entry *te, struct tog_parent_trees *parents,
2509     struct got_object_id *commit_id, struct got_repository *repo)
2510 {
2511 	const struct got_error *err = NULL;
2512 	char *path;
2513 	struct tog_view *blame_view;
2514 
2515 	err = tree_entry_path(&path, parents, te);
2516 	if (err)
2517 		return err;
2518 
2519 	blame_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_BLAME);
2520 	if (blame_view == NULL)
2521 		return got_error_from_errno();
2522 
2523 	err = open_blame_view(blame_view, path, commit_id, repo);
2524 	if (err) {
2525 		view_close(blame_view);
2526 		free(path);
2527 	} else
2528 		*new_view = blame_view;
2529 	return err;
2530 }
2531 
2532 static const struct got_error *
2533 log_tree_entry(struct tog_view **new_view, struct tog_view *parent_view,
2534     struct got_tree_entry *te, struct tog_parent_trees *parents,
2535     struct got_object_id *commit_id, struct got_repository *repo)
2536 {
2537 	struct tog_view *log_view;
2538 	const struct got_error *err = NULL;
2539 	char *path;
2540 
2541 	log_view = view_open(0, 0, 0, 0, parent_view, TOG_VIEW_LOG);
2542 	if (log_view == NULL)
2543 		return got_error_from_errno();
2544 
2545 	err = tree_entry_path(&path, parents, te);
2546 	if (err)
2547 		return err;
2548 
2549 	err = open_log_view(log_view, commit_id, repo, path);
2550 	if (err)
2551 		view_close(log_view);
2552 	else
2553 		*new_view = log_view;
2554 	free(path);
2555 	return err;
2556 }
2557 
2558 static const struct got_error *
2559 open_tree_view(struct tog_view *view, struct got_tree_object *root,
2560     struct got_object_id *commit_id, struct got_repository *repo)
2561 {
2562 	const struct got_error *err = NULL;
2563 	char *commit_id_str = NULL;
2564 	struct tog_tree_view_state *s = &view->state.tree;
2565 
2566 	TAILQ_INIT(&s->parents);
2567 
2568 	err = got_object_id_str(&commit_id_str, commit_id);
2569 	if (err != NULL)
2570 		goto done;
2571 
2572 	if (asprintf(&s->tree_label, "commit: %s", commit_id_str) == -1) {
2573 		err = got_error_from_errno();
2574 		goto done;
2575 	}
2576 
2577 	s->root = s->tree = root;
2578 	s->entries = got_object_tree_get_entries(root);
2579 	s->first_displayed_entry = SIMPLEQ_FIRST(&s->entries->head);
2580 	s->commit_id = commit_id;
2581 	s->repo = repo;
2582 
2583 	view->show = show_tree_view;
2584 	view->input = input_tree_view;
2585 	view->close = close_tree_view;
2586 done:
2587 	free(commit_id_str);
2588 	if (err)
2589 		free(s->tree_label);
2590 	return err;
2591 }
2592 
2593 static const struct got_error *
2594 close_tree_view(struct tog_view *view)
2595 {
2596 	struct tog_tree_view_state *s = &view->state.tree;
2597 
2598 	free(s->tree_label);
2599 	while (!TAILQ_EMPTY(&s->parents)) {
2600 		struct tog_parent_tree *parent;
2601 		parent = TAILQ_FIRST(&s->parents);
2602 		TAILQ_REMOVE(&s->parents, parent, entry);
2603 		free(parent);
2604 
2605 	}
2606 	if (s->tree != s->root)
2607 		got_object_tree_close(s->tree);
2608 	got_object_tree_close(s->root);
2609 
2610 	return NULL;
2611 }
2612 
2613 static const struct got_error *
2614 show_tree_view(struct tog_view *view)
2615 {
2616 	const struct got_error *err = NULL;
2617 	struct tog_tree_view_state *s = &view->state.tree;
2618 	char *parent_path;
2619 
2620 	err = tree_entry_path(&parent_path, &s->parents, NULL);
2621 	if (err)
2622 		return err;
2623 
2624 	err = draw_tree_entries(view, &s->first_displayed_entry,
2625 	    &s->last_displayed_entry, &s->selected_entry,
2626 	    &s->ndisplayed, s->tree_label, s->show_ids, parent_path,
2627 	    s->entries, s->selected, view->nlines, s->tree == s->root);
2628 	free(parent_path);
2629 	return err;
2630 }
2631 
2632 static const struct got_error *
2633 input_tree_view(struct tog_view **new_view, struct tog_view **dead_view,
2634     struct tog_view *view, int ch)
2635 {
2636 	const struct got_error *err = NULL;
2637 	struct tog_tree_view_state *s = &view->state.tree;
2638 
2639 	switch (ch) {
2640 		case 'i':
2641 			s->show_ids = !s->show_ids;
2642 			break;
2643 		case 'l':
2644 			if (s->selected_entry) {
2645 				err = log_tree_entry(new_view, view,
2646 				    s->selected_entry, &s->parents,
2647 				    s->commit_id, s->repo);
2648 			}
2649 			break;
2650 		case 'k':
2651 		case KEY_UP:
2652 			if (s->selected > 0)
2653 				s->selected--;
2654 			if (s->selected > 0)
2655 				break;
2656 			tree_scroll_up(&s->first_displayed_entry, 1,
2657 			    s->entries, s->tree == s->root);
2658 			break;
2659 		case KEY_PPAGE:
2660 			if (SIMPLEQ_FIRST(&s->entries->head) ==
2661 			    s->first_displayed_entry) {
2662 				if (s->tree != s->root)
2663 					s->first_displayed_entry = NULL;
2664 				s->selected = 0;
2665 				break;
2666 			}
2667 			tree_scroll_up(&s->first_displayed_entry,
2668 			    view->nlines, s->entries,
2669 			    s->tree == s->root);
2670 			break;
2671 		case 'j':
2672 		case KEY_DOWN:
2673 			if (s->selected < s->ndisplayed - 1) {
2674 				s->selected++;
2675 				break;
2676 			}
2677 			tree_scroll_down(&s->first_displayed_entry, 1,
2678 			    s->last_displayed_entry, s->entries);
2679 			break;
2680 		case KEY_NPAGE:
2681 			tree_scroll_down(&s->first_displayed_entry,
2682 			    view->nlines, s->last_displayed_entry,
2683 			    s->entries);
2684 			if (SIMPLEQ_NEXT(s->last_displayed_entry,
2685 			    entry))
2686 				break;
2687 			/* can't scroll any further; move cursor down */
2688 			if (s->selected < s->ndisplayed - 1)
2689 				s->selected = s->ndisplayed - 1;
2690 			break;
2691 		case KEY_ENTER:
2692 		case '\r':
2693 			if (s->selected_entry == NULL) {
2694 				struct tog_parent_tree *parent;
2695 		case KEY_LEFT:
2696 				/* user selected '..' */
2697 				if (s->tree == s->root)
2698 					break;
2699 				parent = TAILQ_FIRST(&s->parents);
2700 				TAILQ_REMOVE(&s->parents, parent,
2701 				    entry);
2702 				got_object_tree_close(s->tree);
2703 				s->tree = parent->tree;
2704 				s->entries =
2705 				    got_object_tree_get_entries(s->tree);
2706 				s->first_displayed_entry =
2707 				    parent->first_displayed_entry;
2708 				s->selected_entry =
2709 				    parent->selected_entry;
2710 				s->selected = parent->selected;
2711 				free(parent);
2712 			} else if (S_ISDIR(s->selected_entry->mode)) {
2713 				struct tog_parent_tree *parent;
2714 				struct got_tree_object *child;
2715 				err = got_object_open_as_tree(&child,
2716 				    s->repo, s->selected_entry->id);
2717 				if (err)
2718 					break;
2719 				parent = calloc(1, sizeof(*parent));
2720 				if (parent == NULL) {
2721 					err = got_error_from_errno();
2722 					break;
2723 				}
2724 				parent->tree = s->tree;
2725 				parent->first_displayed_entry =
2726 				   s->first_displayed_entry;
2727 				parent->selected_entry = s->selected_entry;
2728 				parent->selected = s->selected;
2729 				TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2730 				s->tree = child;
2731 				s->entries =
2732 				    got_object_tree_get_entries(s->tree);
2733 				s->selected = 0;
2734 				s->first_displayed_entry = NULL;
2735 			} else if (S_ISREG(s->selected_entry->mode)) {
2736 				err = blame_tree_entry(new_view, view,
2737 				    s->selected_entry, &s->parents,
2738 				    s->commit_id, s->repo);
2739 				if (err)
2740 					break;
2741 			}
2742 			break;
2743 		case KEY_RESIZE:
2744 			if (s->selected > view->nlines)
2745 				s->selected = s->ndisplayed - 1;
2746 			break;
2747 		default:
2748 			break;
2749 	}
2750 
2751 	return err;
2752 }
2753 
2754 __dead static void
2755 usage_tree(void)
2756 {
2757 	endwin();
2758 	fprintf(stderr, "usage: %s tree [-c commit] [repository-path]\n",
2759 	    getprogname());
2760 	exit(1);
2761 }
2762 
2763 static const struct got_error *
2764 cmd_tree(int argc, char *argv[])
2765 {
2766 	const struct got_error *error;
2767 	struct got_repository *repo = NULL;
2768 	char *repo_path = NULL;
2769 	struct got_object_id *commit_id = NULL;
2770 	char *commit_id_arg = NULL;
2771 	struct got_commit_object *commit = NULL;
2772 	struct got_tree_object *tree = NULL;
2773 	int ch;
2774 	struct tog_view *view;
2775 
2776 #ifndef PROFILE
2777 	if (pledge("stdio rpath wpath cpath flock proc tty", NULL) == -1)
2778 		err(1, "pledge");
2779 #endif
2780 
2781 	while ((ch = getopt(argc, argv, "c:")) != -1) {
2782 		switch (ch) {
2783 		case 'c':
2784 			commit_id_arg = optarg;
2785 			break;
2786 		default:
2787 			usage();
2788 			/* NOTREACHED */
2789 		}
2790 	}
2791 
2792 	argc -= optind;
2793 	argv += optind;
2794 
2795 	if (argc == 0) {
2796 		repo_path = getcwd(NULL, 0);
2797 		if (repo_path == NULL)
2798 			return got_error_from_errno();
2799 	} else if (argc == 1) {
2800 		repo_path = realpath(argv[0], NULL);
2801 		if (repo_path == NULL)
2802 			return got_error_from_errno();
2803 	} else
2804 		usage_log();
2805 
2806 	error = got_repo_open(&repo, repo_path);
2807 	free(repo_path);
2808 	if (error != NULL)
2809 		return error;
2810 
2811 	if (commit_id_arg == NULL) {
2812 		error = get_head_commit_id(&commit_id, repo);
2813 		if (error != NULL)
2814 			goto done;
2815 	} else {
2816 		struct got_object *obj;
2817 		error = got_object_open_by_id_str(&obj, repo, commit_id_arg);
2818 		if (error == NULL) {
2819 			commit_id = got_object_get_id(obj);
2820 			if (commit_id == NULL)
2821 				error = got_error_from_errno();
2822 		}
2823 	}
2824 	if (error != NULL)
2825 		goto done;
2826 
2827 	error = got_object_open_as_commit(&commit, repo, commit_id);
2828 	if (error != NULL)
2829 		goto done;
2830 
2831 	error = got_object_open_as_tree(&tree, repo, commit->tree_id);
2832 	if (error != NULL)
2833 		goto done;
2834 
2835 	view = view_open(0, 0, 0, 0, NULL, TOG_VIEW_TREE);
2836 	if (view == NULL) {
2837 		error = got_error_from_errno();
2838 		goto done;
2839 	}
2840 	error = open_tree_view(view, tree, commit_id, repo);
2841 	if (error)
2842 		goto done;
2843 	error = view_loop(view);
2844 done:
2845 	free(commit_id);
2846 	if (commit)
2847 		got_object_commit_close(commit);
2848 	if (tree)
2849 		got_object_tree_close(tree);
2850 	if (repo)
2851 		got_repo_close(repo);
2852 	return error;
2853 }
2854 static void
2855 init_curses(void)
2856 {
2857 	initscr();
2858 	cbreak();
2859 	noecho();
2860 	nonl();
2861 	intrflush(stdscr, FALSE);
2862 	keypad(stdscr, TRUE);
2863 	curs_set(0);
2864 }
2865 
2866 __dead static void
2867 usage(void)
2868 {
2869 	int i;
2870 
2871 	fprintf(stderr, "usage: %s [-h] [command] [arg ...]\n\n"
2872 	    "Available commands:\n", getprogname());
2873 	for (i = 0; i < nitems(tog_commands); i++) {
2874 		struct tog_cmd *cmd = &tog_commands[i];
2875 		fprintf(stderr, "    %s: %s\n", cmd->name, cmd->descr);
2876 	}
2877 	exit(1);
2878 }
2879 
2880 static char **
2881 make_argv(const char *arg0, const char *arg1)
2882 {
2883 	char **argv;
2884 	int argc = (arg1 == NULL ? 1 : 2);
2885 
2886 	argv = calloc(argc, sizeof(char *));
2887 	if (argv == NULL)
2888 		err(1, "calloc");
2889 	argv[0] = strdup(arg0);
2890 	if (argv[0] == NULL)
2891 		err(1, "calloc");
2892 	if (arg1) {
2893 		argv[1] = strdup(arg1);
2894 		if (argv[1] == NULL)
2895 			err(1, "calloc");
2896 	}
2897 
2898 	return argv;
2899 }
2900 
2901 int
2902 main(int argc, char *argv[])
2903 {
2904 	const struct got_error *error = NULL;
2905 	struct tog_cmd *cmd = NULL;
2906 	int ch, hflag = 0;
2907 	char **cmd_argv = NULL;
2908 
2909 	setlocale(LC_ALL, "");
2910 
2911 	while ((ch = getopt(argc, argv, "h")) != -1) {
2912 		switch (ch) {
2913 		case 'h':
2914 			hflag = 1;
2915 			break;
2916 		default:
2917 			usage();
2918 			/* NOTREACHED */
2919 		}
2920 	}
2921 
2922 	argc -= optind;
2923 	argv += optind;
2924 	optind = 0;
2925 	optreset = 1;
2926 
2927 	if (argc == 0) {
2928 		if (hflag)
2929 			usage();
2930 		/* Build an argument vector which runs a default command. */
2931 		cmd = &tog_commands[0];
2932 		cmd_argv = make_argv(cmd->name, NULL);
2933 		argc = 1;
2934 	} else {
2935 		int i;
2936 
2937 		/* Did the user specific a command? */
2938 		for (i = 0; i < nitems(tog_commands); i++) {
2939 			if (strncmp(tog_commands[i].name, argv[0],
2940 			    strlen(argv[0])) == 0) {
2941 				cmd = &tog_commands[i];
2942 				if (hflag)
2943 					tog_commands[i].cmd_usage();
2944 				break;
2945 			}
2946 		}
2947 		if (cmd == NULL) {
2948 			/* Did the user specify a repository? */
2949 			char *repo_path = realpath(argv[0], NULL);
2950 			if (repo_path) {
2951 				struct got_repository *repo;
2952 				error = got_repo_open(&repo, repo_path);
2953 				if (error == NULL)
2954 					got_repo_close(repo);
2955 			} else
2956 				error = got_error_from_errno();
2957 			if (error) {
2958 				if (hflag) {
2959 					fprintf(stderr, "%s: '%s' is not a "
2960 					    "known command\n", getprogname(),
2961 					    argv[0]);
2962 					usage();
2963 				}
2964 				fprintf(stderr, "%s: '%s' is neither a known "
2965 				    "command nor a path to a repository\n",
2966 				    getprogname(), argv[0]);
2967 				free(repo_path);
2968 				return 1;
2969 			}
2970 			cmd = &tog_commands[0];
2971 			cmd_argv = make_argv(cmd->name, repo_path);
2972 			argc = 2;
2973 			free(repo_path);
2974 		}
2975 	}
2976 
2977 	init_curses();
2978 
2979 	error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
2980 	if (error)
2981 		goto done;
2982 done:
2983 	endwin();
2984 	free(cmd_argv);
2985 	if (error)
2986 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
2987 	return 0;
2988 }