1 /*
2  * Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
3  * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/queue.h>
19 #include <sys/limits.h>
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 
23 #include <err.h>
24 #include <errno.h>
25 #include <locale.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <libgen.h>
32 #include <time.h>
33 
34 #include "got_error.h"
35 #include "got_object.h"
36 #include "got_reference.h"
37 #include "got_repository.h"
38 #include "got_worktree.h"
39 #include "got_diff.h"
40 #include "got_commit_graph.h"
41 #include "got_blame.h"
42 #include "got_privsep.h"
43 
44 #ifndef nitems
45 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
46 #endif
47 
48 static volatile sig_atomic_t sigint_received;
49 static volatile sig_atomic_t sigpipe_received;
50 
51 static void
52 catch_sigint(int signo)
53 {
54 	sigint_received = 1;
55 }
56 
57 static void
58 catch_sigpipe(int signo)
59 {
60 	sigpipe_received = 1;
61 }
62 
63 
64 struct cmd {
65 	const char	 *cmd_name;
66 	const struct got_error *(*cmd_main)(int, char *[]);
67 	void		(*cmd_usage)(void);
68 	const char	 *cmd_descr;
69 };
70 
71 __dead static void	usage(void);
72 __dead static void	usage_checkout(void);
73 __dead static void	usage_update(void);
74 __dead static void	usage_log(void);
75 __dead static void	usage_diff(void);
76 __dead static void	usage_blame(void);
77 __dead static void	usage_tree(void);
78 __dead static void	usage_status(void);
79 
80 static const struct got_error*		cmd_checkout(int, char *[]);
81 static const struct got_error*		cmd_update(int, char *[]);
82 static const struct got_error*		cmd_log(int, char *[]);
83 static const struct got_error*		cmd_diff(int, char *[]);
84 static const struct got_error*		cmd_blame(int, char *[]);
85 static const struct got_error*		cmd_tree(int, char *[]);
86 static const struct got_error*		cmd_status(int, char *[]);
87 
88 static struct cmd got_commands[] = {
89 	{ "checkout",	cmd_checkout,	usage_checkout,
90 	    "check out a new work tree from a repository" },
91 	{ "update",	cmd_update,	usage_update,
92 	    "update a work tree to a different commit" },
93 	{ "log",	cmd_log,	usage_log,
94 	    "show repository history" },
95 	{ "diff",	cmd_diff,	usage_diff,
96 	    "compare files and directories" },
97 	{ "blame",	cmd_blame,	usage_blame,
98 	    " show when lines in a file were changed" },
99 	{ "tree",	cmd_tree,	usage_tree,
100 	    " list files and directories in repository" },
101 	{ "status",	cmd_status,	usage_status,
102 	    "show modification status of files" },
103 };
104 
105 int
106 main(int argc, char *argv[])
107 {
108 	struct cmd *cmd;
109 	unsigned int i;
110 	int ch;
111 	int hflag = 0;
112 
113 	setlocale(LC_CTYPE, "");
114 
115 	while ((ch = getopt(argc, argv, "h")) != -1) {
116 		switch (ch) {
117 		case 'h':
118 			hflag = 1;
119 			break;
120 		default:
121 			usage();
122 			/* NOTREACHED */
123 		}
124 	}
125 
126 	argc -= optind;
127 	argv += optind;
128 	optind = 0;
129 
130 	if (argc <= 0)
131 		usage();
132 
133 	signal(SIGINT, catch_sigint);
134 	signal(SIGPIPE, catch_sigpipe);
135 
136 	for (i = 0; i < nitems(got_commands); i++) {
137 		const struct got_error *error;
138 
139 		cmd = &got_commands[i];
140 
141 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
142 			continue;
143 
144 		if (hflag)
145 			got_commands[i].cmd_usage();
146 
147 		error = got_commands[i].cmd_main(argc, argv);
148 		if (error && !(sigint_received || sigpipe_received)) {
149 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
150 			return 1;
151 		}
152 
153 		return 0;
154 	}
155 
156 	fprintf(stderr, "%s: unknown command '%s'\n", getprogname(), argv[0]);
157 	return 1;
158 }
159 
160 __dead static void
161 usage(void)
162 {
163 	int i;
164 
165 	fprintf(stderr, "usage: %s [-h] command [arg ...]\n\n"
166 	    "Available commands:\n", getprogname());
167 	for (i = 0; i < nitems(got_commands); i++) {
168 		struct cmd *cmd = &got_commands[i];
169 		fprintf(stderr, "    %s: %s\n", cmd->cmd_name, cmd->cmd_descr);
170 	}
171 	exit(1);
172 }
173 
174 static const struct got_error *
175 apply_unveil(const char *repo_path, const char *worktree_path)
176 {
177 	const struct got_error *error;
178 
179 	if (repo_path && unveil(repo_path, "r") != 0)
180 		return got_error_from_errno();
181 
182 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
183 		return got_error_from_errno();
184 
185 	if (unveil("/tmp", "rwc") != 0)
186 		return got_error_from_errno();
187 
188 	error = got_privsep_unveil_exec_helpers();
189 	if (error != NULL)
190 		return error;
191 
192 	if (unveil(NULL, NULL) != 0)
193 		return got_error_from_errno();
194 
195 	return NULL;
196 }
197 
198 __dead static void
199 usage_checkout(void)
200 {
201 	fprintf(stderr, "usage: %s checkout [-p prefix] repository-path "
202 	    "[worktree-path]\n", getprogname());
203 	exit(1);
204 }
205 
206 static void
207 checkout_progress(void *arg, unsigned char status, const char *path)
208 {
209 	char *worktree_path = arg;
210 
211 	while (path[0] == '/')
212 		path++;
213 
214 	printf("%c  %s/%s\n", status, worktree_path, path);
215 }
216 
217 static const struct got_error *
218 check_cancelled(void *arg)
219 {
220 	if (sigint_received || sigpipe_received)
221 		return got_error(GOT_ERR_CANCELLED);
222 	return NULL;
223 }
224 
225 static const struct got_error *
226 check_ancestry(struct got_worktree *worktree, struct got_object_id *commit_id,
227     struct got_repository *repo)
228 {
229 	const struct got_error *err;
230 	struct got_reference *head_ref = NULL;
231 	struct got_object_id *head_commit_id = NULL;
232 	struct got_commit_graph *graph = NULL;
233 
234 	head_ref = got_worktree_get_head_ref(worktree);
235 	if (head_ref == NULL)
236 		return got_error_from_errno();
237 
238 	/* TODO: Check the reflog. The head ref may have been rebased. */
239 	err = got_ref_resolve(&head_commit_id, repo, head_ref);
240 	if (err)
241 		goto done;
242 
243 	err = got_commit_graph_open(&graph, head_commit_id, "/", 1, repo);
244 	if (err)
245 		goto done;
246 
247 	err = got_commit_graph_iter_start(graph, head_commit_id, repo);
248 	if (err)
249 		goto done;
250 	while (1) {
251 		struct got_object_id *id;
252 
253 		if (sigint_received || sigpipe_received)
254 			break;
255 
256 		err = got_commit_graph_iter_next(&id, graph);
257 		if (err) {
258 			if (err->code == GOT_ERR_ITER_COMPLETED) {
259 				err = got_error(GOT_ERR_ANCESTRY);
260 				break;
261 			}
262 			if (err->code != GOT_ERR_ITER_NEED_MORE)
263 				break;
264 			err = got_commit_graph_fetch_commits(graph, 1, repo);
265 			if (err)
266 				break;
267 			else
268 				continue;
269 		}
270 		if (id == NULL)
271 			break;
272 		if (got_object_id_cmp(id, commit_id) == 0)
273 			break;
274 	}
275 done:
276 	if (head_ref)
277 		got_ref_close(head_ref);
278 	if (graph)
279 		got_commit_graph_close(graph);
280 	return err;
281 }
282 
283 
284 static const struct got_error *
285 cmd_checkout(int argc, char *argv[])
286 {
287 	const struct got_error *error = NULL;
288 	struct got_repository *repo = NULL;
289 	struct got_reference *head_ref = NULL;
290 	struct got_worktree *worktree = NULL;
291 	char *repo_path = NULL;
292 	char *worktree_path = NULL;
293 	const char *path_prefix = "";
294 	char *commit_id_str = NULL;
295 	int ch, same_path_prefix;
296 
297 	while ((ch = getopt(argc, argv, "c:p:")) != -1) {
298 		switch (ch) {
299 		case 'c':
300 			commit_id_str = strdup(optarg);
301 			if (commit_id_str == NULL)
302 				return got_error_from_errno();
303 			break;
304 		case 'p':
305 			path_prefix = optarg;
306 			break;
307 		default:
308 			usage();
309 			/* NOTREACHED */
310 		}
311 	}
312 
313 	argc -= optind;
314 	argv += optind;
315 
316 #ifndef PROFILE
317 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
318 	    NULL) == -1)
319 		err(1, "pledge");
320 #endif
321 	if (argc == 1) {
322 		char *cwd, *base, *dotgit;
323 		repo_path = realpath(argv[0], NULL);
324 		if (repo_path == NULL)
325 			return got_error_from_errno();
326 		cwd = getcwd(NULL, 0);
327 		if (cwd == NULL) {
328 			error = got_error_from_errno();
329 			goto done;
330 		}
331 		if (path_prefix[0])
332 			base = basename(path_prefix);
333 		else
334 			base = basename(repo_path);
335 		if (base == NULL) {
336 			error = got_error_from_errno();
337 			goto done;
338 		}
339 		dotgit = strstr(base, ".git");
340 		if (dotgit)
341 			*dotgit = '\0';
342 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
343 			error = got_error_from_errno();
344 			free(cwd);
345 			goto done;
346 		}
347 		free(cwd);
348 	} else if (argc == 2) {
349 		repo_path = realpath(argv[0], NULL);
350 		if (repo_path == NULL) {
351 			error = got_error_from_errno();
352 			goto done;
353 		}
354 		worktree_path = realpath(argv[1], NULL);
355 		if (worktree_path == NULL) {
356 			error = got_error_from_errno();
357 			goto done;
358 		}
359 	} else
360 		usage_checkout();
361 
362 	error = apply_unveil(repo_path, worktree_path);
363 	if (error)
364 		goto done;
365 
366 	error = got_repo_open(&repo, repo_path);
367 	if (error != NULL)
368 		goto done;
369 
370 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
371 	if (error != NULL)
372 		goto done;
373 
374 	error = got_worktree_init(worktree_path, head_ref, path_prefix, repo);
375 	if (error != NULL && !(error->code == GOT_ERR_ERRNO && errno == EEXIST))
376 		goto done;
377 
378 	error = got_worktree_open(&worktree, worktree_path);
379 	if (error != NULL)
380 		goto done;
381 
382 	error = got_worktree_match_path_prefix(&same_path_prefix, worktree,
383 	    path_prefix);
384 	if (error != NULL)
385 		goto done;
386 	if (!same_path_prefix) {
387 		error = got_error(GOT_ERR_PATH_PREFIX);
388 		goto done;
389 	}
390 
391 	if (commit_id_str) {
392 		struct got_object_id *commit_id;
393 		error = got_object_resolve_id_str(&commit_id, repo,
394 		    commit_id_str);
395 		if (error != NULL)
396 			goto done;
397 		error = check_ancestry(worktree, commit_id, repo);
398 		if (error != NULL) {
399 			free(commit_id);
400 			goto done;
401 		}
402 		error = got_worktree_set_base_commit_id(worktree, repo,
403 		    commit_id);
404 		free(commit_id);
405 		if (error)
406 			goto done;
407 	}
408 
409 	error = got_worktree_checkout_files(worktree, repo,
410 	    checkout_progress, worktree_path, check_cancelled, NULL);
411 	if (error != NULL)
412 		goto done;
413 
414 	printf("Now shut up and hack\n");
415 
416 done:
417 	free(commit_id_str);
418 	free(repo_path);
419 	free(worktree_path);
420 	return error;
421 }
422 
423 __dead static void
424 usage_update(void)
425 {
426 	fprintf(stderr, "usage: %s update [-c commit] [worktree-path]\n",
427 	    getprogname());
428 	exit(1);
429 }
430 
431 static void
432 update_progress(void *arg, unsigned char status, const char *path)
433 {
434 	int *did_something = arg;
435 
436 	if (status == GOT_STATUS_EXISTS)
437 		return;
438 
439 	*did_something = 1;
440 	while (path[0] == '/')
441 		path++;
442 	printf("%c  %s\n", status, path);
443 }
444 
445 static const struct got_error *
446 cmd_update(int argc, char *argv[])
447 {
448 	const struct got_error *error = NULL;
449 	struct got_repository *repo = NULL;
450 	struct got_worktree *worktree = NULL;
451 	char *worktree_path = NULL;
452 	struct got_object_id *commit_id = NULL;
453 	char *commit_id_str = NULL;
454 	int ch, did_something = 0;
455 
456 	while ((ch = getopt(argc, argv, "c:")) != -1) {
457 		switch (ch) {
458 		case 'c':
459 			commit_id_str = strdup(optarg);
460 			if (commit_id_str == NULL)
461 				return got_error_from_errno();
462 			break;
463 		default:
464 			usage();
465 			/* NOTREACHED */
466 		}
467 	}
468 
469 	argc -= optind;
470 	argv += optind;
471 
472 #ifndef PROFILE
473 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
474 	    NULL) == -1)
475 		err(1, "pledge");
476 #endif
477 	if (argc == 0) {
478 		worktree_path = getcwd(NULL, 0);
479 		if (worktree_path == NULL) {
480 			error = got_error_from_errno();
481 			goto done;
482 		}
483 	} else if (argc == 1) {
484 		worktree_path = realpath(argv[0], NULL);
485 		if (worktree_path == NULL) {
486 			error = got_error_from_errno();
487 			goto done;
488 		}
489 	} else
490 		usage_update();
491 
492 	error = got_worktree_open(&worktree, worktree_path);
493 	if (error != NULL)
494 		goto done;
495 
496 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree));
497 	if (error != NULL)
498 		goto done;
499 
500 	error = apply_unveil(got_repo_get_path(repo),
501 	    got_worktree_get_root_path(worktree));
502 	if (error)
503 		goto done;
504 
505 	if (commit_id_str == NULL) {
506 		struct got_reference *head_ref;
507 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
508 		if (error != NULL)
509 			goto done;
510 		error = got_ref_resolve(&commit_id, repo, head_ref);
511 		if (error != NULL)
512 			goto done;
513 		error = got_object_id_str(&commit_id_str, commit_id);
514 		if (error != NULL)
515 			goto done;
516 	} else {
517 		error = got_object_resolve_id_str(&commit_id, repo,
518 		    commit_id_str);
519 		if (error != NULL)
520 			goto done;
521 	}
522 
523 	error = check_ancestry(worktree, commit_id, repo);
524 	if (error != NULL)
525 		goto done;
526 
527 	if (got_object_id_cmp(got_worktree_get_base_commit_id(worktree),
528 	    commit_id) != 0) {
529 		error = got_worktree_set_base_commit_id(worktree, repo,
530 		    commit_id);
531 		if (error)
532 			goto done;
533 	}
534 
535 	error = got_worktree_checkout_files(worktree, repo,
536 	    update_progress, &did_something, check_cancelled, NULL);
537 	if (error != NULL)
538 		goto done;
539 
540 	if (did_something)
541 		printf("Updated to commit %s\n", commit_id_str);
542 	else
543 		printf("Already up-to-date\n");
544 done:
545 	free(worktree_path);
546 	free(commit_id);
547 	free(commit_id_str);
548 	return error;
549 }
550 
551 static const struct got_error *
552 print_patch(struct got_commit_object *commit, struct got_object_id *id,
553     int diff_context, struct got_repository *repo)
554 {
555 	const struct got_error *err = NULL;
556 	struct got_tree_object *tree1 = NULL, *tree2;
557 	struct got_object_qid *qid;
558 	char *id_str1 = NULL, *id_str2;
559 
560 	err = got_object_open_as_tree(&tree2, repo,
561 	    got_object_commit_get_tree_id(commit));
562 	if (err)
563 		return err;
564 
565 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
566 	if (qid != NULL) {
567 		struct got_commit_object *pcommit;
568 
569 		err = got_object_open_as_commit(&pcommit, repo, qid->id);
570 		if (err)
571 			return err;
572 
573 		err = got_object_open_as_tree(&tree1, repo,
574 		    got_object_commit_get_tree_id(pcommit));
575 		got_object_commit_close(pcommit);
576 		if (err)
577 			return err;
578 
579 		err = got_object_id_str(&id_str1, qid->id);
580 		if (err)
581 			return err;
582 	}
583 
584 	err = got_object_id_str(&id_str2, id);
585 	if (err)
586 		goto done;
587 
588 	printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null", id_str2);
589 	err = got_diff_tree(tree1, tree2, "", "", diff_context, repo, stdout);
590 done:
591 	if (tree1)
592 		got_object_tree_close(tree1);
593 	got_object_tree_close(tree2);
594 	free(id_str1);
595 	free(id_str2);
596 	return err;
597 }
598 
599 static char *
600 get_datestr(time_t *time, char *datebuf)
601 {
602 	char *p, *s = ctime_r(time, datebuf);
603 	p = strchr(s, '\n');
604 	if (p)
605 		*p = '\0';
606 	return s;
607 }
608 
609 static const struct got_error *
610 print_commit(struct got_commit_object *commit, struct got_object_id *id,
611     struct got_repository *repo, int show_patch, int diff_context,
612     struct got_reflist_head *refs)
613 {
614 	const struct got_error *err = NULL;
615 	char *id_str, *datestr, *logmsg0, *logmsg, *line;
616 	char datebuf[26];
617 	time_t committer_time;
618 	const char *author, *committer;
619 	char *refs_str = NULL;
620 	struct got_reflist_entry *re;
621 
622 	SIMPLEQ_FOREACH(re, refs, entry) {
623 		char *s;
624 		const char *name;
625 		if (got_object_id_cmp(re->id, id) != 0)
626 			continue;
627 		name = got_ref_get_name(re->ref);
628 		if (strncmp(name, "refs/", 5) == 0)
629 			name += 5;
630 		if (strncmp(name, "heads/", 6) == 0)
631 			name += 6;
632 		if (strncmp(name, "remotes/", 8) == 0)
633 			name += 8;
634 		s = refs_str;
635 		if (asprintf(&refs_str, "%s%s%s", s ? s : "", s ? ", " : "",
636 		    name) == -1) {
637 			err = got_error_from_errno();
638 			free(s);
639 			break;
640 		}
641 		free(s);
642 	}
643 	err = got_object_id_str(&id_str, id);
644 	if (err)
645 		return err;
646 
647 	printf("-----------------------------------------------\n");
648 	printf("commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
649 	    refs_str ? refs_str : "", refs_str ? ")" : "");
650 	free(id_str);
651 	printf("from: %s\n", got_object_commit_get_author(commit));
652 	committer_time = got_object_commit_get_committer_time(commit);
653 	datestr = get_datestr(&committer_time, datebuf);
654 	printf("date: %s UTC\n", datestr);
655 	author = got_object_commit_get_author(commit);
656 	committer = got_object_commit_get_committer(commit);
657 	if (strcmp(author, committer) != 0)
658 		printf("via: %s\n", committer);
659 	if (got_object_commit_get_nparents(commit) > 1) {
660 		const struct got_object_id_queue *parent_ids;
661 		struct got_object_qid *qid;
662 		int n = 1;
663 		parent_ids = got_object_commit_get_parent_ids(commit);
664 		SIMPLEQ_FOREACH(qid, parent_ids, entry) {
665 			err = got_object_id_str(&id_str, qid->id);
666 			if (err)
667 				return err;
668 			printf("parent %d: %s\n", n++, id_str);
669 			free(id_str);
670 		}
671 	}
672 
673 	logmsg0 = strdup(got_object_commit_get_logmsg(commit));
674 	if (logmsg0 == NULL)
675 		return got_error_from_errno();
676 
677 	logmsg = logmsg0;
678 	do {
679 		line = strsep(&logmsg, "\n");
680 		if (line)
681 			printf(" %s\n", line);
682 	} while (line);
683 	free(logmsg0);
684 
685 	if (show_patch) {
686 		err = print_patch(commit, id, diff_context, repo);
687 		if (err == 0)
688 			printf("\n");
689 	}
690 
691 	fflush(stdout);
692 	return err;
693 }
694 
695 static const struct got_error *
696 print_commits(struct got_object_id *root_id, struct got_repository *repo,
697     char *path, int show_patch, int diff_context, int limit,
698     int first_parent_traversal, struct got_reflist_head *refs)
699 {
700 	const struct got_error *err;
701 	struct got_commit_graph *graph;
702 
703 	err = got_commit_graph_open(&graph, root_id, path,
704 	    first_parent_traversal, repo);
705 	if (err)
706 		return err;
707 	err = got_commit_graph_iter_start(graph, root_id, repo);
708 	if (err)
709 		goto done;
710 	while (1) {
711 		struct got_commit_object *commit;
712 		struct got_object_id *id;
713 
714 		if (sigint_received || sigpipe_received)
715 			break;
716 
717 		err = got_commit_graph_iter_next(&id, graph);
718 		if (err) {
719 			if (err->code == GOT_ERR_ITER_COMPLETED) {
720 				err = NULL;
721 				break;
722 			}
723 			if (err->code != GOT_ERR_ITER_NEED_MORE)
724 				break;
725 			err = got_commit_graph_fetch_commits(graph, 1, repo);
726 			if (err)
727 				break;
728 			else
729 				continue;
730 		}
731 		if (id == NULL)
732 			break;
733 
734 		err = got_object_open_as_commit(&commit, repo, id);
735 		if (err)
736 			break;
737 		err = print_commit(commit, id, repo, show_patch, diff_context,
738 		    refs);
739 		got_object_commit_close(commit);
740 		if (err || (limit && --limit == 0))
741 			break;
742 	}
743 done:
744 	got_commit_graph_close(graph);
745 	return err;
746 }
747 
748 __dead static void
749 usage_log(void)
750 {
751 	fprintf(stderr, "usage: %s log [-c commit] [-C number] [-f] [ -l N ] [-p] "
752 	    "[-r repository-path] [path]\n", getprogname());
753 	exit(1);
754 }
755 
756 static const struct got_error *
757 cmd_log(int argc, char *argv[])
758 {
759 	const struct got_error *error;
760 	struct got_repository *repo = NULL;
761 	struct got_worktree *worktree = NULL;
762 	struct got_commit_object *commit = NULL;
763 	struct got_object_id *id = NULL;
764 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
765 	char *start_commit = NULL;
766 	int diff_context = 3, ch;
767 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
768 	const char *errstr;
769 	struct got_reflist_head refs;
770 
771 #ifndef PROFILE
772 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
773 	    NULL)
774 	    == -1)
775 		err(1, "pledge");
776 #endif
777 
778 	while ((ch = getopt(argc, argv, "pc:C:l:fr:")) != -1) {
779 		switch (ch) {
780 		case 'p':
781 			show_patch = 1;
782 			break;
783 		case 'c':
784 			start_commit = optarg;
785 			break;
786 		case 'C':
787 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
788 			    &errstr);
789 			if (errstr != NULL)
790 				err(1, "-C option %s", errstr);
791 			break;
792 		case 'l':
793 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
794 			if (errstr != NULL)
795 				err(1, "-l option %s", errstr);
796 			break;
797 		case 'f':
798 			first_parent_traversal = 1;
799 			break;
800 		case 'r':
801 			repo_path = realpath(optarg, NULL);
802 			if (repo_path == NULL)
803 				err(1, "-r option");
804 			break;
805 		default:
806 			usage();
807 			/* NOTREACHED */
808 		}
809 	}
810 
811 	argc -= optind;
812 	argv += optind;
813 
814 	if (argc == 0)
815 		path = strdup("");
816 	else if (argc == 1)
817 		path = strdup(argv[0]);
818 	else
819 		usage_log();
820 	if (path == NULL)
821 		return got_error_from_errno();
822 
823 	cwd = getcwd(NULL, 0);
824 	if (cwd == NULL) {
825 		error = got_error_from_errno();
826 		goto done;
827 	}
828 
829 	error = got_worktree_open(&worktree, cwd);
830 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
831 		goto done;
832 	error = NULL;
833 
834 	repo_path = worktree ?
835 	    strdup(got_worktree_get_repo_path(worktree)) : strdup(cwd);
836 	if (repo_path == NULL) {
837 		error = got_error_from_errno();
838 		goto done;
839 	}
840 
841 	error = apply_unveil(repo_path, NULL);
842 	if (error)
843 		goto done;
844 
845 	error = got_repo_open(&repo, repo_path);
846 	if (error != NULL)
847 		goto done;
848 
849 	if (start_commit == NULL) {
850 		struct got_reference *head_ref;
851 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
852 		if (error != NULL)
853 			return error;
854 		error = got_ref_resolve(&id, repo, head_ref);
855 		got_ref_close(head_ref);
856 		if (error != NULL)
857 			return error;
858 		error = got_object_open_as_commit(&commit, repo, id);
859 	} else {
860 		struct got_reference *ref;
861 		error = got_ref_open(&ref, repo, start_commit);
862 		if (error == NULL) {
863 			int obj_type;
864 			error = got_ref_resolve(&id, repo, ref);
865 			got_ref_close(ref);
866 			if (error != NULL)
867 				goto done;
868 			error = got_object_get_type(&obj_type, repo, id);
869 			if (error != NULL)
870 				goto done;
871 			if (obj_type == GOT_OBJ_TYPE_TAG) {
872 				struct got_tag_object *tag;
873 				error = got_object_open_as_tag(&tag, repo, id);
874 				if (error != NULL)
875 					goto done;
876 				if (got_object_tag_get_object_type(tag) !=
877 				    GOT_OBJ_TYPE_COMMIT) {
878 					got_object_tag_close(tag);
879 					error = got_error(GOT_ERR_OBJ_TYPE);
880 					goto done;
881 				}
882 				free(id);
883 				id = got_object_id_dup(
884 				    got_object_tag_get_object_id(tag));
885 				if (id == NULL)
886 					error = got_error_from_errno();
887 				got_object_tag_close(tag);
888 				if (error)
889 					goto done;
890 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
891 				error = got_error(GOT_ERR_OBJ_TYPE);
892 				goto done;
893 			}
894 			error = got_object_open_as_commit(&commit, repo, id);
895 			if (error != NULL)
896 				goto done;
897 		}
898 		if (commit == NULL) {
899 			error = got_object_resolve_id_str(&id, repo,
900 			    start_commit);
901 			if (error != NULL)
902 				return error;
903 		}
904 	}
905 	if (error != NULL)
906 		goto done;
907 
908 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
909 	if (error != NULL)
910 		goto done;
911 	if (in_repo_path) {
912 		free(path);
913 		path = in_repo_path;
914 	}
915 
916 	SIMPLEQ_INIT(&refs);
917 	error = got_ref_list(&refs, repo);
918 	if (error)
919 		goto done;
920 
921 	error = print_commits(id, repo, path, show_patch,
922 	    diff_context, limit, first_parent_traversal, &refs);
923 done:
924 	free(path);
925 	free(repo_path);
926 	free(cwd);
927 	free(id);
928 	if (worktree)
929 		got_worktree_close(worktree);
930 	if (repo) {
931 		const struct got_error *repo_error;
932 		repo_error = got_repo_close(repo);
933 		if (error == NULL)
934 			error = repo_error;
935 	}
936 	return error;
937 }
938 
939 __dead static void
940 usage_diff(void)
941 {
942 	fprintf(stderr, "usage: %s diff [-C number] [repository-path] "
943 	    "object1 object2\n", getprogname());
944 	exit(1);
945 }
946 
947 static const struct got_error *
948 cmd_diff(int argc, char *argv[])
949 {
950 	const struct got_error *error;
951 	struct got_repository *repo = NULL;
952 	char *repo_path = NULL;
953 	struct got_object_id *id1 = NULL, *id2 = NULL;
954 	char *id_str1 = NULL, *id_str2 = NULL;
955 	int type1, type2;
956 	int diff_context = 3, ch;
957 	const char *errstr;
958 
959 #ifndef PROFILE
960 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
961 	    NULL) == -1)
962 		err(1, "pledge");
963 #endif
964 
965 	while ((ch = getopt(argc, argv, "C:")) != -1) {
966 		switch (ch) {
967 		case 'C':
968 			diff_context = strtonum(optarg, 1, INT_MAX, &errstr);
969 			if (errstr != NULL)
970 				err(1, "-C option %s", errstr);
971 			break;
972 		default:
973 			usage();
974 			/* NOTREACHED */
975 		}
976 	}
977 
978 	argc -= optind;
979 	argv += optind;
980 
981 	if (argc == 0) {
982 		usage_diff(); /* TODO show local worktree changes */
983 	} else if (argc == 2) {
984 		repo_path = getcwd(NULL, 0);
985 		if (repo_path == NULL)
986 			return got_error_from_errno();
987 		id_str1 = argv[0];
988 		id_str2 = argv[1];
989 	} else if (argc == 3) {
990 		repo_path = realpath(argv[0], NULL);
991 		if (repo_path == NULL)
992 			return got_error_from_errno();
993 		id_str1 = argv[1];
994 		id_str2 = argv[2];
995 	} else
996 		usage_diff();
997 
998 	error = apply_unveil(repo_path, NULL);
999 	if (error)
1000 		goto done;
1001 
1002 	error = got_repo_open(&repo, repo_path);
1003 	free(repo_path);
1004 	if (error != NULL)
1005 		goto done;
1006 
1007 	error = got_object_resolve_id_str(&id1, repo, id_str1);
1008 	if (error)
1009 		goto done;
1010 
1011 	error = got_object_resolve_id_str(&id2, repo, id_str2);
1012 	if (error)
1013 		goto done;
1014 
1015 	error = got_object_get_type(&type1, repo, id1);
1016 	if (error)
1017 		goto done;
1018 
1019 	error = got_object_get_type(&type2, repo, id2);
1020 	if (error)
1021 		goto done;
1022 
1023 	if (type1 != type2) {
1024 		error = got_error(GOT_ERR_OBJ_TYPE);
1025 		goto done;
1026 	}
1027 
1028 	switch (type1) {
1029 	case GOT_OBJ_TYPE_BLOB:
1030 		error = got_diff_objects_as_blobs(id1, id2, NULL, NULL,
1031 		    diff_context, repo, stdout);
1032 		break;
1033 	case GOT_OBJ_TYPE_TREE:
1034 		error = got_diff_objects_as_trees(id1, id2, "", "",
1035 		    diff_context, repo, stdout);
1036 		break;
1037 	case GOT_OBJ_TYPE_COMMIT:
1038 		printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null",
1039 		    id_str2);
1040 		error = got_diff_objects_as_commits(id1, id2, diff_context,
1041 		    repo, stdout);
1042 		break;
1043 	default:
1044 		error = got_error(GOT_ERR_OBJ_TYPE);
1045 	}
1046 
1047 done:
1048 	free(id1);
1049 	free(id2);
1050 	if (repo) {
1051 		const struct got_error *repo_error;
1052 		repo_error = got_repo_close(repo);
1053 		if (error == NULL)
1054 			error = repo_error;
1055 	}
1056 	return error;
1057 }
1058 
1059 __dead static void
1060 usage_blame(void)
1061 {
1062 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
1063 	    getprogname());
1064 	exit(1);
1065 }
1066 
1067 static const struct got_error *
1068 cmd_blame(int argc, char *argv[])
1069 {
1070 	const struct got_error *error;
1071 	struct got_repository *repo = NULL;
1072 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1073 	struct got_object_id *commit_id = NULL;
1074 	char *commit_id_str = NULL;
1075 	int ch;
1076 
1077 #ifndef PROFILE
1078 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1079 	    NULL) == -1)
1080 		err(1, "pledge");
1081 #endif
1082 
1083 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
1084 		switch (ch) {
1085 		case 'c':
1086 			commit_id_str = optarg;
1087 			break;
1088 		case 'r':
1089 			repo_path = realpath(optarg, NULL);
1090 			if (repo_path == NULL)
1091 				err(1, "-r option");
1092 			break;
1093 		default:
1094 			usage();
1095 			/* NOTREACHED */
1096 		}
1097 	}
1098 
1099 	argc -= optind;
1100 	argv += optind;
1101 
1102 	if (argc == 1)
1103 		path = argv[0];
1104 	else
1105 		usage_blame();
1106 
1107 	cwd = getcwd(NULL, 0);
1108 	if (cwd == NULL) {
1109 		error = got_error_from_errno();
1110 		goto done;
1111 	}
1112 	if (repo_path == NULL) {
1113 		repo_path = strdup(cwd);
1114 		if (repo_path == NULL) {
1115 			error = got_error_from_errno();
1116 			goto done;
1117 		}
1118 	}
1119 
1120 	error = apply_unveil(repo_path, NULL);
1121 	if (error)
1122 		goto done;
1123 
1124 	error = got_repo_open(&repo, repo_path);
1125 	if (error != NULL)
1126 		goto done;
1127 
1128 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
1129 	if (error != NULL)
1130 		goto done;
1131 
1132 	if (commit_id_str == NULL) {
1133 		struct got_reference *head_ref;
1134 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1135 		if (error != NULL)
1136 			goto done;
1137 		error = got_ref_resolve(&commit_id, repo, head_ref);
1138 		got_ref_close(head_ref);
1139 		if (error != NULL)
1140 			goto done;
1141 	} else {
1142 		error = got_object_resolve_id_str(&commit_id, repo,
1143 		    commit_id_str);
1144 		if (error != NULL)
1145 			goto done;
1146 	}
1147 
1148 	error = got_blame(in_repo_path, commit_id, repo, stdout);
1149 done:
1150 	free(in_repo_path);
1151 	free(repo_path);
1152 	free(cwd);
1153 	free(commit_id);
1154 	if (repo) {
1155 		const struct got_error *repo_error;
1156 		repo_error = got_repo_close(repo);
1157 		if (error == NULL)
1158 			error = repo_error;
1159 	}
1160 	return error;
1161 }
1162 
1163 __dead static void
1164 usage_tree(void)
1165 {
1166 	fprintf(stderr,
1167 	    "usage: %s tree [-c commit] [-r repository-path] [-iR] path\n",
1168 	    getprogname());
1169 	exit(1);
1170 }
1171 
1172 static void
1173 print_entry(struct got_tree_entry *te, const char *id, const char *path,
1174     const char *root_path)
1175 {
1176 	int is_root_path = (strcmp(path, root_path) == 0);
1177 
1178 	path += strlen(root_path);
1179 	while (path[0] == '/')
1180 		path++;
1181 
1182 	printf("%s%s%s%s%s\n", id ? id : "", path,
1183 	    is_root_path ? "" : "/",
1184 	    te->name, S_ISDIR(te->mode) ? "/" : "");
1185 }
1186 
1187 static const struct got_error *
1188 print_tree(const char *path, struct got_object_id *commit_id,
1189     int show_ids, int recurse, const char *root_path,
1190     struct got_repository *repo)
1191 {
1192 	const struct got_error *err = NULL;
1193 	struct got_object_id *tree_id = NULL;
1194 	struct got_tree_object *tree = NULL;
1195 	const struct got_tree_entries *entries;
1196 	struct got_tree_entry *te;
1197 
1198 	err = got_object_id_by_path(&tree_id, repo, commit_id, path);
1199 	if (err)
1200 		goto done;
1201 
1202 	err = got_object_open_as_tree(&tree, repo, tree_id);
1203 	if (err)
1204 		goto done;
1205 	entries = got_object_tree_get_entries(tree);
1206 	te = SIMPLEQ_FIRST(&entries->head);
1207 	while (te) {
1208 		char *id = NULL;
1209 
1210 		if (sigint_received || sigpipe_received)
1211 			break;
1212 
1213 		if (show_ids) {
1214 			char *id_str;
1215 			err = got_object_id_str(&id_str, te->id);
1216 			if (err)
1217 				goto done;
1218 			if (asprintf(&id, "%s ", id_str) == -1) {
1219 				err = got_error_from_errno();
1220 				free(id_str);
1221 				goto done;
1222 			}
1223 			free(id_str);
1224 		}
1225 		print_entry(te, id, path, root_path);
1226 		free(id);
1227 
1228 		if (recurse && S_ISDIR(te->mode)) {
1229 			char *child_path;
1230 			if (asprintf(&child_path, "%s%s%s", path,
1231 			    path[0] == '/' && path[1] == '\0' ? "" : "/",
1232 			    te->name) == -1) {
1233 				err = got_error_from_errno();
1234 				goto done;
1235 			}
1236 			err = print_tree(child_path, commit_id, show_ids, 1,
1237 			    root_path, repo);
1238 			free(child_path);
1239 			if (err)
1240 				goto done;
1241 		}
1242 
1243 		te = SIMPLEQ_NEXT(te, entry);
1244 	}
1245 done:
1246 	if (tree)
1247 		got_object_tree_close(tree);
1248 	free(tree_id);
1249 	return err;
1250 }
1251 
1252 static const struct got_error *
1253 cmd_tree(int argc, char *argv[])
1254 {
1255 	const struct got_error *error;
1256 	struct got_repository *repo = NULL;
1257 	struct got_worktree *worktree = NULL;
1258 	const char *path;
1259 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1260 	struct got_object_id *commit_id = NULL;
1261 	char *commit_id_str = NULL;
1262 	int show_ids = 0, recurse = 0;
1263 	int ch;
1264 
1265 #ifndef PROFILE
1266 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1267 	    NULL) == -1)
1268 		err(1, "pledge");
1269 #endif
1270 
1271 	while ((ch = getopt(argc, argv, "c:r:iR")) != -1) {
1272 		switch (ch) {
1273 		case 'c':
1274 			commit_id_str = optarg;
1275 			break;
1276 		case 'r':
1277 			repo_path = realpath(optarg, NULL);
1278 			if (repo_path == NULL)
1279 				err(1, "-r option");
1280 			break;
1281 		case 'i':
1282 			show_ids = 1;
1283 			break;
1284 		case 'R':
1285 			recurse = 1;
1286 			break;
1287 		default:
1288 			usage();
1289 			/* NOTREACHED */
1290 		}
1291 	}
1292 
1293 	argc -= optind;
1294 	argv += optind;
1295 
1296 	if (argc == 1)
1297 		path = argv[0];
1298 	else if (argc > 1)
1299 		usage_tree();
1300 	else
1301 		path = NULL;
1302 
1303 	cwd = getcwd(NULL, 0);
1304 	if (cwd == NULL) {
1305 		error = got_error_from_errno();
1306 		goto done;
1307 	}
1308 	if (repo_path == NULL) {
1309 		error = got_worktree_open(&worktree, cwd);
1310 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
1311 			goto done;
1312 		else
1313 			error = NULL;
1314 		if (worktree) {
1315 			repo_path =
1316 			    strdup(got_worktree_get_repo_path(worktree));
1317 			if (repo_path == NULL)
1318 				error = got_error_from_errno();
1319 			if (error)
1320 				goto done;
1321 		} else {
1322 			repo_path = strdup(cwd);
1323 			if (repo_path == NULL) {
1324 				error = got_error_from_errno();
1325 				goto done;
1326 			}
1327 		}
1328 	}
1329 
1330 	error = apply_unveil(repo_path, NULL);
1331 	if (error)
1332 		goto done;
1333 
1334 	error = got_repo_open(&repo, repo_path);
1335 	if (error != NULL)
1336 		goto done;
1337 
1338 	if (path == NULL) {
1339 		if (worktree) {
1340 			char *p, *worktree_subdir = cwd +
1341 			    strlen(got_worktree_get_root_path(worktree));
1342 			if (asprintf(&p, "%s/%s",
1343 			    got_worktree_get_path_prefix(worktree),
1344 			    worktree_subdir) == -1) {
1345 				error = got_error_from_errno();
1346 				goto done;
1347 			}
1348 			error = got_repo_map_path(&in_repo_path, repo, p, 1);
1349 			free(p);
1350 			if (error)
1351 				goto done;
1352 		} else
1353 			path = "/";
1354 	}
1355 	if (in_repo_path == NULL) {
1356 		error = got_repo_map_path(&in_repo_path, repo, path, 1);
1357 		if (error != NULL)
1358 			goto done;
1359 	}
1360 
1361 	if (commit_id_str == NULL) {
1362 		struct got_reference *head_ref;
1363 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1364 		if (error != NULL)
1365 			goto done;
1366 		error = got_ref_resolve(&commit_id, repo, head_ref);
1367 		got_ref_close(head_ref);
1368 		if (error != NULL)
1369 			goto done;
1370 	} else {
1371 		error = got_object_resolve_id_str(&commit_id, repo,
1372 		    commit_id_str);
1373 		if (error != NULL)
1374 			goto done;
1375 	}
1376 
1377 	error = print_tree(in_repo_path, commit_id, show_ids, recurse,
1378 	    in_repo_path, repo);
1379 done:
1380 	free(in_repo_path);
1381 	free(repo_path);
1382 	free(cwd);
1383 	free(commit_id);
1384 	if (worktree)
1385 		got_worktree_close(worktree);
1386 	if (repo) {
1387 		const struct got_error *repo_error;
1388 		repo_error = got_repo_close(repo);
1389 		if (error == NULL)
1390 			error = repo_error;
1391 	}
1392 	return error;
1393 }
1394 
1395 __dead static void
1396 usage_status(void)
1397 {
1398 	fprintf(stderr, "usage: %s status [worktree-path]\n", getprogname());
1399 	exit(1);
1400 }
1401 
1402 static void
1403 print_status(void *arg, unsigned char status, const char *path)
1404 {
1405 	printf("%c  %s\n", status, path);
1406 }
1407 
1408 static const struct got_error *
1409 cmd_status(int argc, char *argv[])
1410 {
1411 	const struct got_error *error = NULL;
1412 	struct got_repository *repo = NULL;
1413 	struct got_worktree *worktree = NULL;
1414 	char *worktree_path = NULL;
1415 	int ch;
1416 
1417 	while ((ch = getopt(argc, argv, "")) != -1) {
1418 		switch (ch) {
1419 		default:
1420 			usage();
1421 			/* NOTREACHED */
1422 		}
1423 	}
1424 
1425 	argc -= optind;
1426 	argv += optind;
1427 
1428 #ifndef PROFILE
1429 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1430 	    NULL) == -1)
1431 		err(1, "pledge");
1432 #endif
1433 	if (argc == 0) {
1434 		worktree_path = getcwd(NULL, 0);
1435 		if (worktree_path == NULL) {
1436 			error = got_error_from_errno();
1437 			goto done;
1438 		}
1439 	} else if (argc == 1) {
1440 		worktree_path = realpath(argv[0], NULL);
1441 		if (worktree_path == NULL) {
1442 			error = got_error_from_errno();
1443 			goto done;
1444 		}
1445 	} else
1446 		usage_status();
1447 
1448 	error = got_worktree_open(&worktree, worktree_path);
1449 	if (error != NULL)
1450 		goto done;
1451 
1452 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree));
1453 	if (error != NULL)
1454 		goto done;
1455 
1456 	error = apply_unveil(got_repo_get_path(repo),
1457 	    got_worktree_get_root_path(worktree));
1458 	if (error)
1459 		goto done;
1460 
1461 	error = got_worktree_status(worktree, repo, print_status, NULL,
1462 	    check_cancelled, NULL);
1463 done:
1464 	free(worktree_path);
1465 	return error;
1466 }