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 
79 static const struct got_error*		cmd_checkout(int, char *[]);
80 static const struct got_error*		cmd_update(int, char *[]);
81 static const struct got_error*		cmd_log(int, char *[]);
82 static const struct got_error*		cmd_diff(int, char *[]);
83 static const struct got_error*		cmd_blame(int, char *[]);
84 static const struct got_error*		cmd_tree(int, char *[]);
85 #ifdef notyet
86 static const struct got_error*		cmd_status(int, char *[]);
87 #endif
88 
89 static struct cmd got_commands[] = {
90 	{ "checkout",	cmd_checkout,	usage_checkout,
91 	    "check out a new work tree from a repository" },
92 	{ "update",	cmd_update,	usage_update,
93 	    "update a work tree to a different commit" },
94 	{ "log",	cmd_log,	usage_log,
95 	    "show repository history" },
96 	{ "diff",	cmd_diff,	usage_diff,
97 	    "compare files and directories" },
98 	{ "blame",	cmd_blame,	usage_blame,
99 	    " show when lines in a file were changed" },
100 	{ "tree",	cmd_tree,	usage_tree,
101 	    " list files and directories in repository" },
102 #ifdef notyet
103 	{ "status",	cmd_status,	usage_status,
104 	    "show modification status of files" },
105 #endif
106 };
107 
108 int
109 main(int argc, char *argv[])
110 {
111 	struct cmd *cmd;
112 	unsigned int i;
113 	int ch;
114 	int hflag = 0;
115 
116 	setlocale(LC_ALL, "");
117 
118 	while ((ch = getopt(argc, argv, "h")) != -1) {
119 		switch (ch) {
120 		case 'h':
121 			hflag = 1;
122 			break;
123 		default:
124 			usage();
125 			/* NOTREACHED */
126 		}
127 	}
128 
129 	argc -= optind;
130 	argv += optind;
131 	optind = 0;
132 
133 	if (argc <= 0)
134 		usage();
135 
136 	signal(SIGINT, catch_sigint);
137 	signal(SIGPIPE, catch_sigpipe);
138 
139 	for (i = 0; i < nitems(got_commands); i++) {
140 		const struct got_error *error;
141 
142 		cmd = &got_commands[i];
143 
144 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
145 			continue;
146 
147 		if (hflag)
148 			got_commands[i].cmd_usage();
149 
150 		error = got_commands[i].cmd_main(argc, argv);
151 		if (error && !(sigint_received || sigpipe_received)) {
152 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
153 			return 1;
154 		}
155 
156 		return 0;
157 	}
158 
159 	fprintf(stderr, "%s: unknown command '%s'\n", getprogname(), argv[0]);
160 	return 1;
161 }
162 
163 __dead static void
164 usage(void)
165 {
166 	int i;
167 
168 	fprintf(stderr, "usage: %s [-h] command [arg ...]\n\n"
169 	    "Available commands:\n", getprogname());
170 	for (i = 0; i < nitems(got_commands); i++) {
171 		struct cmd *cmd = &got_commands[i];
172 		fprintf(stderr, "    %s: %s\n", cmd->cmd_name, cmd->cmd_descr);
173 	}
174 	exit(1);
175 }
176 
177 static const struct got_error *
178 apply_unveil(const char *repo_path, const char *worktree_path)
179 {
180 	const struct got_error *error;
181 
182 	if (repo_path && unveil(repo_path, "r") != 0)
183 		return got_error_from_errno();
184 
185 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
186 		return got_error_from_errno();
187 
188 	if (unveil("/tmp", "rwc") != 0)
189 		return got_error_from_errno();
190 
191 	error = got_privsep_unveil_exec_helpers();
192 	if (error != NULL)
193 		return error;
194 
195 	if (unveil(NULL, NULL) != 0)
196 		return got_error_from_errno();
197 
198 	return NULL;
199 }
200 
201 __dead static void
202 usage_checkout(void)
203 {
204 	fprintf(stderr, "usage: %s checkout [-p prefix] repository-path "
205 	    "[worktree-path]\n", getprogname());
206 	exit(1);
207 }
208 
209 static void
210 checkout_progress(void *arg, unsigned char status, const char *path)
211 {
212 	char *worktree_path = arg;
213 
214 	while (path[0] == '/')
215 		path++;
216 
217 	printf("%c  %s/%s\n", status, worktree_path, path);
218 }
219 
220 static const struct got_error *
221 checkout_cancel(void *arg)
222 {
223 	if (sigint_received || sigpipe_received)
224 		return got_error(GOT_ERR_CANCELLED);
225 	return NULL;
226 }
227 
228 static const struct got_error *
229 check_ancestry(struct got_worktree *worktree, struct got_object_id *commit_id,
230     struct got_repository *repo)
231 {
232 	const struct got_error *err;
233 	struct got_reference *head_ref = NULL;
234 	struct got_object_id *head_commit_id = NULL;
235 	struct got_commit_graph *graph = NULL;
236 
237 	head_ref = got_worktree_get_head_ref(worktree);
238 	if (head_ref == NULL)
239 		return got_error_from_errno();
240 
241 	/* TODO: Check the reflog. The head ref may have been rebased. */
242 	err = got_ref_resolve(&head_commit_id, repo, head_ref);
243 	if (err)
244 		goto done;
245 
246 	err = got_commit_graph_open(&graph, head_commit_id, "/", 1, repo);
247 	if (err)
248 		goto done;
249 
250 	err = got_commit_graph_iter_start(graph, head_commit_id, repo);
251 	if (err)
252 		goto done;
253 	while (1) {
254 		struct got_object_id *id;
255 
256 		if (sigint_received || sigpipe_received)
257 			break;
258 
259 		err = got_commit_graph_iter_next(&id, graph);
260 		if (err) {
261 			if (err->code == GOT_ERR_ITER_COMPLETED) {
262 				err = got_error(GOT_ERR_ANCESTRY);
263 				break;
264 			}
265 			if (err->code != GOT_ERR_ITER_NEED_MORE)
266 				break;
267 			err = got_commit_graph_fetch_commits(graph, 1, repo);
268 			if (err)
269 				break;
270 			else
271 				continue;
272 		}
273 		if (id == NULL)
274 			break;
275 		if (got_object_id_cmp(id, commit_id) == 0)
276 			break;
277 	}
278 done:
279 	if (head_ref)
280 		got_ref_close(head_ref);
281 	if (graph)
282 		got_commit_graph_close(graph);
283 	return err;
284 }
285 
286 
287 static const struct got_error *
288 cmd_checkout(int argc, char *argv[])
289 {
290 	const struct got_error *error = NULL;
291 	struct got_repository *repo = NULL;
292 	struct got_reference *head_ref = NULL;
293 	struct got_worktree *worktree = NULL;
294 	char *repo_path = NULL;
295 	char *worktree_path = NULL;
296 	const char *path_prefix = "";
297 	char *commit_id_str = NULL;
298 	int ch, same_path_prefix;
299 
300 	while ((ch = getopt(argc, argv, "c:p:")) != -1) {
301 		switch (ch) {
302 		case 'c':
303 			commit_id_str = strdup(optarg);
304 			if (commit_id_str == NULL)
305 				return got_error_from_errno();
306 			break;
307 		case 'p':
308 			path_prefix = optarg;
309 			break;
310 		default:
311 			usage();
312 			/* NOTREACHED */
313 		}
314 	}
315 
316 	argc -= optind;
317 	argv += optind;
318 
319 #ifndef PROFILE
320 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
321 	    NULL) == -1)
322 		err(1, "pledge");
323 #endif
324 	if (argc == 1) {
325 		char *cwd, *base, *dotgit;
326 		repo_path = realpath(argv[0], NULL);
327 		if (repo_path == NULL)
328 			return got_error_from_errno();
329 		cwd = getcwd(NULL, 0);
330 		if (cwd == NULL) {
331 			error = got_error_from_errno();
332 			goto done;
333 		}
334 		if (path_prefix[0])
335 			base = basename(path_prefix);
336 		else
337 			base = basename(repo_path);
338 		if (base == NULL) {
339 			error = got_error_from_errno();
340 			goto done;
341 		}
342 		dotgit = strstr(base, ".git");
343 		if (dotgit)
344 			*dotgit = '\0';
345 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
346 			error = got_error_from_errno();
347 			free(cwd);
348 			goto done;
349 		}
350 		free(cwd);
351 	} else if (argc == 2) {
352 		repo_path = realpath(argv[0], NULL);
353 		if (repo_path == NULL) {
354 			error = got_error_from_errno();
355 			goto done;
356 		}
357 		worktree_path = realpath(argv[1], NULL);
358 		if (worktree_path == NULL) {
359 			error = got_error_from_errno();
360 			goto done;
361 		}
362 	} else
363 		usage_checkout();
364 
365 	error = apply_unveil(repo_path, worktree_path);
366 	if (error)
367 		goto done;
368 
369 	error = got_repo_open(&repo, repo_path);
370 	if (error != NULL)
371 		goto done;
372 
373 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
374 	if (error != NULL)
375 		goto done;
376 
377 	error = got_worktree_init(worktree_path, head_ref, path_prefix, repo);
378 	if (error != NULL && !(error->code == GOT_ERR_ERRNO && errno == EEXIST))
379 		goto done;
380 
381 	error = got_worktree_open(&worktree, worktree_path);
382 	if (error != NULL)
383 		goto done;
384 
385 	error = got_worktree_match_path_prefix(&same_path_prefix, worktree,
386 	    path_prefix);
387 	if (error != NULL)
388 		goto done;
389 	if (!same_path_prefix) {
390 		error = got_error(GOT_ERR_PATH_PREFIX);
391 		goto done;
392 	}
393 
394 	if (commit_id_str) {
395 		struct got_object_id *commit_id;
396 		error = got_object_resolve_id_str(&commit_id, repo,
397 		    commit_id_str);
398 		if (error != NULL)
399 			goto done;
400 		error = check_ancestry(worktree, commit_id, repo);
401 		if (error != NULL) {
402 			free(commit_id);
403 			goto done;
404 		}
405 		error = got_worktree_set_base_commit_id(worktree, repo,
406 		    commit_id);
407 		free(commit_id);
408 		if (error)
409 			goto done;
410 	}
411 
412 	error = got_worktree_checkout_files(worktree, repo,
413 	    checkout_progress, worktree_path, checkout_cancel, NULL);
414 	if (error != NULL)
415 		goto done;
416 
417 	printf("Now shut up and hack\n");
418 
419 done:
420 	free(commit_id_str);
421 	free(repo_path);
422 	free(worktree_path);
423 	return error;
424 }
425 
426 __dead static void
427 usage_update(void)
428 {
429 	fprintf(stderr, "usage: %s update [-c commit] [worktree-path]\n",
430 	    getprogname());
431 	exit(1);
432 }
433 
434 static void
435 update_progress(void *arg, unsigned char status, const char *path)
436 {
437 	int *did_something = arg;
438 
439 	if (status == GOT_STATUS_EXISTS)
440 		return;
441 
442 	*did_something = 1;
443 	while (path[0] == '/')
444 		path++;
445 	printf("%c  %s\n", status, path);
446 }
447 
448 static const struct got_error *
449 cmd_update(int argc, char *argv[])
450 {
451 	const struct got_error *error = NULL;
452 	struct got_repository *repo = NULL;
453 	struct got_worktree *worktree = NULL;
454 	char *worktree_path = NULL;
455 	struct got_object_id *commit_id = NULL;
456 	char *commit_id_str = NULL;
457 	int ch, did_something = 0;
458 
459 	while ((ch = getopt(argc, argv, "c:")) != -1) {
460 		switch (ch) {
461 		case 'c':
462 			commit_id_str = strdup(optarg);
463 			if (commit_id_str == NULL)
464 				return got_error_from_errno();
465 			break;
466 		default:
467 			usage();
468 			/* NOTREACHED */
469 		}
470 	}
471 
472 	argc -= optind;
473 	argv += optind;
474 
475 #ifndef PROFILE
476 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
477 	    NULL) == -1)
478 		err(1, "pledge");
479 #endif
480 	if (argc == 0) {
481 		worktree_path = getcwd(NULL, 0);
482 		if (worktree_path == NULL) {
483 			error = got_error_from_errno();
484 			goto done;
485 		}
486 	} else if (argc == 1) {
487 		worktree_path = realpath(argv[0], NULL);
488 		if (worktree_path == NULL) {
489 			error = got_error_from_errno();
490 			goto done;
491 		}
492 	} else
493 		usage_update();
494 
495 	error = got_worktree_open(&worktree, worktree_path);
496 	if (error != NULL)
497 		goto done;
498 
499 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree));
500 	if (error != NULL)
501 		goto done;
502 
503 	error = apply_unveil(got_repo_get_path(repo), worktree_path);
504 	if (error)
505 		goto done;
506 
507 	if (commit_id_str == NULL) {
508 		struct got_reference *head_ref;
509 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
510 		if (error != NULL)
511 			goto done;
512 		error = got_ref_resolve(&commit_id, repo, head_ref);
513 		if (error != NULL)
514 			goto done;
515 		error = got_object_id_str(&commit_id_str, commit_id);
516 		if (error != NULL)
517 			goto done;
518 	} else {
519 		error = got_object_resolve_id_str(&commit_id, repo,
520 		    commit_id_str);
521 		if (error != NULL)
522 			goto done;
523 	}
524 
525 	error = check_ancestry(worktree, commit_id, repo);
526 	if (error != NULL)
527 		goto done;
528 
529 	if (got_object_id_cmp(got_worktree_get_base_commit_id(worktree),
530 	    commit_id) != 0) {
531 		error = got_worktree_set_base_commit_id(worktree, repo,
532 		    commit_id);
533 		if (error)
534 			goto done;
535 	}
536 
537 	error = got_worktree_checkout_files(worktree, repo,
538 	    update_progress, &did_something, checkout_cancel, NULL);
539 	if (error != NULL)
540 		goto done;
541 
542 	if (did_something)
543 		printf("Updated to commit %s\n", commit_id_str);
544 	else
545 		printf("Already up-to-date\n");
546 done:
547 	free(worktree_path);
548 	free(commit_id);
549 	free(commit_id_str);
550 	return error;
551 }
552 
553 static const struct got_error *
554 print_patch(struct got_commit_object *commit, struct got_object_id *id,
555     int diff_context, struct got_repository *repo)
556 {
557 	const struct got_error *err = NULL;
558 	struct got_tree_object *tree1 = NULL, *tree2;
559 	struct got_object_qid *qid;
560 	char *id_str1 = NULL, *id_str2;
561 
562 	err = got_object_open_as_tree(&tree2, repo,
563 	    got_object_commit_get_tree_id(commit));
564 	if (err)
565 		return err;
566 
567 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
568 	if (qid != NULL) {
569 		struct got_commit_object *pcommit;
570 
571 		err = got_object_open_as_commit(&pcommit, repo, qid->id);
572 		if (err)
573 			return err;
574 
575 		err = got_object_open_as_tree(&tree1, repo,
576 		    got_object_commit_get_tree_id(pcommit));
577 		got_object_commit_close(pcommit);
578 		if (err)
579 			return err;
580 
581 		err = got_object_id_str(&id_str1, qid->id);
582 		if (err)
583 			return err;
584 	}
585 
586 	err = got_object_id_str(&id_str2, id);
587 	if (err)
588 		goto done;
589 
590 	printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null", id_str2);
591 	err = got_diff_tree(tree1, tree2, "", "", diff_context, repo, stdout);
592 done:
593 	if (tree1)
594 		got_object_tree_close(tree1);
595 	got_object_tree_close(tree2);
596 	free(id_str1);
597 	free(id_str2);
598 	return err;
599 }
600 
601 static char *
602 get_datestr(time_t *time, char *datebuf)
603 {
604 	char *p, *s = ctime_r(time, datebuf);
605 	p = strchr(s, '\n');
606 	if (p)
607 		*p = '\0';
608 	return s;
609 }
610 
611 static const struct got_error *
612 print_commit(struct got_commit_object *commit, struct got_object_id *id,
613     struct got_repository *repo, int show_patch, int diff_context,
614     struct got_reflist_head *refs)
615 {
616 	const struct got_error *err = NULL;
617 	char *id_str, *datestr, *logmsg0, *logmsg, *line;
618 	char datebuf[26];
619 	time_t committer_time;
620 	const char *author, *committer;
621 	char *refs_str = NULL;
622 	struct got_reflist_entry *re;
623 
624 	SIMPLEQ_FOREACH(re, refs, entry) {
625 		char *s;
626 		const char *name;
627 		if (got_object_id_cmp(re->id, id) != 0)
628 			continue;
629 		name = got_ref_get_name(re->ref);
630 		if (strncmp(name, "refs/", 5) == 0)
631 			name += 5;
632 		if (strncmp(name, "heads/", 6) == 0)
633 			name += 6;
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_commit_object *commit = NULL;
762 	struct got_object_id *id = NULL;
763 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
764 	char *start_commit = NULL;
765 	int diff_context = 3, ch;
766 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
767 	const char *errstr;
768 	struct got_reflist_head refs;
769 
770 #ifndef PROFILE
771 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
772 	    NULL)
773 	    == -1)
774 		err(1, "pledge");
775 #endif
776 
777 	while ((ch = getopt(argc, argv, "pc:C:l:fr:")) != -1) {
778 		switch (ch) {
779 		case 'p':
780 			show_patch = 1;
781 			break;
782 		case 'c':
783 			start_commit = optarg;
784 			break;
785 		case 'C':
786 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
787 			    &errstr);
788 			if (errstr != NULL)
789 				err(1, "-C option %s", errstr);
790 			break;
791 		case 'l':
792 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
793 			if (errstr != NULL)
794 				err(1, "-l option %s", errstr);
795 			break;
796 		case 'f':
797 			first_parent_traversal = 1;
798 			break;
799 		case 'r':
800 			repo_path = realpath(optarg, NULL);
801 			if (repo_path == NULL)
802 				err(1, "-r option");
803 			break;
804 		default:
805 			usage();
806 			/* NOTREACHED */
807 		}
808 	}
809 
810 	argc -= optind;
811 	argv += optind;
812 
813 	if (argc == 0)
814 		path = strdup("");
815 	else if (argc == 1)
816 		path = strdup(argv[0]);
817 	else
818 		usage_log();
819 	if (path == NULL)
820 		return got_error_from_errno();
821 
822 	cwd = getcwd(NULL, 0);
823 	if (cwd == NULL) {
824 		error = got_error_from_errno();
825 		goto done;
826 	}
827 	if (repo_path == NULL) {
828 		repo_path = strdup(cwd);
829 		if (repo_path == NULL) {
830 			error = got_error_from_errno();
831 			goto done;
832 		}
833 	}
834 
835 	error = apply_unveil(repo_path, NULL);
836 	if (error)
837 		goto done;
838 
839 	error = got_repo_open(&repo, repo_path);
840 	if (error != NULL)
841 		goto done;
842 
843 	if (start_commit == NULL) {
844 		struct got_reference *head_ref;
845 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
846 		if (error != NULL)
847 			return error;
848 		error = got_ref_resolve(&id, repo, head_ref);
849 		got_ref_close(head_ref);
850 		if (error != NULL)
851 			return error;
852 		error = got_object_open_as_commit(&commit, repo, id);
853 	} else {
854 		struct got_reference *ref;
855 		error = got_ref_open(&ref, repo, start_commit);
856 		if (error == NULL) {
857 			int obj_type;
858 			error = got_ref_resolve(&id, repo, ref);
859 			got_ref_close(ref);
860 			if (error != NULL)
861 				goto done;
862 			error = got_object_get_type(&obj_type, repo, id);
863 			if (error != NULL)
864 				goto done;
865 			if (obj_type == GOT_OBJ_TYPE_TAG) {
866 				struct got_tag_object *tag;
867 				error = got_object_open_as_tag(&tag, repo, id);
868 				if (error != NULL)
869 					goto done;
870 				if (got_object_tag_get_object_type(tag) !=
871 				    GOT_OBJ_TYPE_COMMIT) {
872 					got_object_tag_close(tag);
873 					error = got_error(GOT_ERR_OBJ_TYPE);
874 					goto done;
875 				}
876 				free(id);
877 				id = got_object_id_dup(
878 				    got_object_tag_get_object_id(tag));
879 				if (id == NULL)
880 					error = got_error_from_errno();
881 				got_object_tag_close(tag);
882 				if (error)
883 					goto done;
884 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
885 				error = got_error(GOT_ERR_OBJ_TYPE);
886 				goto done;
887 			}
888 			error = got_object_open_as_commit(&commit, repo, id);
889 			if (error != NULL)
890 				goto done;
891 		}
892 		if (commit == NULL) {
893 			error = got_object_resolve_id_str(&id, repo,
894 			    start_commit);
895 			if (error != NULL)
896 				return error;
897 		}
898 	}
899 	if (error != NULL)
900 		goto done;
901 
902 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
903 	if (error != NULL)
904 		goto done;
905 	if (in_repo_path) {
906 		free(path);
907 		path = in_repo_path;
908 	}
909 
910 	SIMPLEQ_INIT(&refs);
911 	error = got_ref_list(&refs, repo);
912 	if (error)
913 		goto done;
914 
915 	error = print_commits(id, repo, path, show_patch,
916 	    diff_context, limit, first_parent_traversal, &refs);
917 done:
918 	free(path);
919 	free(repo_path);
920 	free(cwd);
921 	free(id);
922 	if (repo) {
923 		const struct got_error *repo_error;
924 		repo_error = got_repo_close(repo);
925 		if (error == NULL)
926 			error = repo_error;
927 	}
928 	return error;
929 }
930 
931 __dead static void
932 usage_diff(void)
933 {
934 	fprintf(stderr, "usage: %s diff [-C number] [repository-path] "
935 	    "object1 object2\n", getprogname());
936 	exit(1);
937 }
938 
939 static const struct got_error *
940 cmd_diff(int argc, char *argv[])
941 {
942 	const struct got_error *error;
943 	struct got_repository *repo = NULL;
944 	char *repo_path = NULL;
945 	struct got_object_id *id1 = NULL, *id2 = NULL;
946 	char *id_str1 = NULL, *id_str2 = NULL;
947 	int type1, type2;
948 	int diff_context = 3, ch;
949 	const char *errstr;
950 
951 #ifndef PROFILE
952 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
953 	    NULL) == -1)
954 		err(1, "pledge");
955 #endif
956 
957 	while ((ch = getopt(argc, argv, "C:")) != -1) {
958 		switch (ch) {
959 		case 'C':
960 			diff_context = strtonum(optarg, 1, INT_MAX, &errstr);
961 			if (errstr != NULL)
962 				err(1, "-C option %s", errstr);
963 			break;
964 		default:
965 			usage();
966 			/* NOTREACHED */
967 		}
968 	}
969 
970 	argc -= optind;
971 	argv += optind;
972 
973 	if (argc == 0) {
974 		usage_diff(); /* TODO show local worktree changes */
975 	} else if (argc == 2) {
976 		repo_path = getcwd(NULL, 0);
977 		if (repo_path == NULL)
978 			return got_error_from_errno();
979 		id_str1 = argv[0];
980 		id_str2 = argv[1];
981 	} else if (argc == 3) {
982 		repo_path = realpath(argv[0], NULL);
983 		if (repo_path == NULL)
984 			return got_error_from_errno();
985 		id_str1 = argv[1];
986 		id_str2 = argv[2];
987 	} else
988 		usage_diff();
989 
990 	error = apply_unveil(repo_path, NULL);
991 	if (error)
992 		goto done;
993 
994 	error = got_repo_open(&repo, repo_path);
995 	free(repo_path);
996 	if (error != NULL)
997 		goto done;
998 
999 	error = got_object_resolve_id_str(&id1, repo, id_str1);
1000 	if (error)
1001 		goto done;
1002 
1003 	error = got_object_resolve_id_str(&id2, repo, id_str2);
1004 	if (error)
1005 		goto done;
1006 
1007 	error = got_object_get_type(&type1, repo, id1);
1008 	if (error)
1009 		goto done;
1010 
1011 	error = got_object_get_type(&type2, repo, id2);
1012 	if (error)
1013 		goto done;
1014 
1015 	if (type1 != type2) {
1016 		error = got_error(GOT_ERR_OBJ_TYPE);
1017 		goto done;
1018 	}
1019 
1020 	switch (type1) {
1021 	case GOT_OBJ_TYPE_BLOB:
1022 		error = got_diff_objects_as_blobs(id1, id2, NULL, NULL,
1023 		    diff_context, repo, stdout);
1024 		break;
1025 	case GOT_OBJ_TYPE_TREE:
1026 		error = got_diff_objects_as_trees(id1, id2, "", "",
1027 		    diff_context, repo, stdout);
1028 		break;
1029 	case GOT_OBJ_TYPE_COMMIT:
1030 		printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null",
1031 		    id_str2);
1032 		error = got_diff_objects_as_commits(id1, id2, diff_context,
1033 		    repo, stdout);
1034 		break;
1035 	default:
1036 		error = got_error(GOT_ERR_OBJ_TYPE);
1037 	}
1038 
1039 done:
1040 	free(id1);
1041 	free(id2);
1042 	if (repo) {
1043 		const struct got_error *repo_error;
1044 		repo_error = got_repo_close(repo);
1045 		if (error == NULL)
1046 			error = repo_error;
1047 	}
1048 	return error;
1049 }
1050 
1051 __dead static void
1052 usage_blame(void)
1053 {
1054 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
1055 	    getprogname());
1056 	exit(1);
1057 }
1058 
1059 static const struct got_error *
1060 cmd_blame(int argc, char *argv[])
1061 {
1062 	const struct got_error *error;
1063 	struct got_repository *repo = NULL;
1064 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1065 	struct got_object_id *commit_id = NULL;
1066 	char *commit_id_str = NULL;
1067 	int ch;
1068 
1069 #ifndef PROFILE
1070 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1071 	    NULL) == -1)
1072 		err(1, "pledge");
1073 #endif
1074 
1075 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
1076 		switch (ch) {
1077 		case 'c':
1078 			commit_id_str = optarg;
1079 			break;
1080 		case 'r':
1081 			repo_path = realpath(optarg, NULL);
1082 			if (repo_path == NULL)
1083 				err(1, "-r option");
1084 			break;
1085 		default:
1086 			usage();
1087 			/* NOTREACHED */
1088 		}
1089 	}
1090 
1091 	argc -= optind;
1092 	argv += optind;
1093 
1094 	if (argc == 1)
1095 		path = argv[0];
1096 	else
1097 		usage_blame();
1098 
1099 	cwd = getcwd(NULL, 0);
1100 	if (cwd == NULL) {
1101 		error = got_error_from_errno();
1102 		goto done;
1103 	}
1104 	if (repo_path == NULL) {
1105 		repo_path = strdup(cwd);
1106 		if (repo_path == NULL) {
1107 			error = got_error_from_errno();
1108 			goto done;
1109 		}
1110 	}
1111 
1112 	error = apply_unveil(repo_path, NULL);
1113 	if (error)
1114 		goto done;
1115 
1116 	error = got_repo_open(&repo, repo_path);
1117 	if (error != NULL)
1118 		goto done;
1119 
1120 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
1121 	if (error != NULL)
1122 		goto done;
1123 
1124 	if (commit_id_str == NULL) {
1125 		struct got_reference *head_ref;
1126 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1127 		if (error != NULL)
1128 			goto done;
1129 		error = got_ref_resolve(&commit_id, repo, head_ref);
1130 		got_ref_close(head_ref);
1131 		if (error != NULL)
1132 			goto done;
1133 	} else {
1134 		error = got_object_resolve_id_str(&commit_id, repo,
1135 		    commit_id_str);
1136 		if (error != NULL)
1137 			goto done;
1138 	}
1139 
1140 	error = got_blame(in_repo_path, commit_id, repo, stdout);
1141 done:
1142 	free(in_repo_path);
1143 	free(repo_path);
1144 	free(cwd);
1145 	free(commit_id);
1146 	if (repo) {
1147 		const struct got_error *repo_error;
1148 		repo_error = got_repo_close(repo);
1149 		if (error == NULL)
1150 			error = repo_error;
1151 	}
1152 	return error;
1153 }
1154 
1155 __dead static void
1156 usage_tree(void)
1157 {
1158 	fprintf(stderr,
1159 	    "usage: %s tree [-c commit] [-r repository-path] [-iR] path\n",
1160 	    getprogname());
1161 	exit(1);
1162 }
1163 
1164 static void
1165 print_entry(struct got_tree_entry *te, const char *id, const char *path,
1166     const char *root_path)
1167 {
1168 	int is_root_path = (strcmp(path, root_path) == 0);
1169 
1170 	path += strlen(root_path);
1171 	while (path[0] == '/')
1172 		path++;
1173 
1174 	printf("%s%s%s%s%s\n", id ? id : "", path,
1175 	    is_root_path ? "" : "/",
1176 	    te->name, S_ISDIR(te->mode) ? "/" : "");
1177 }
1178 
1179 static const struct got_error *
1180 print_tree(const char *path, struct got_object_id *commit_id,
1181     int show_ids, int recurse, const char *root_path,
1182     struct got_repository *repo)
1183 {
1184 	const struct got_error *err = NULL;
1185 	struct got_object_id *tree_id = NULL;
1186 	struct got_tree_object *tree = NULL;
1187 	const struct got_tree_entries *entries;
1188 	struct got_tree_entry *te;
1189 
1190 	err = got_object_id_by_path(&tree_id, repo, commit_id, path);
1191 	if (err)
1192 		goto done;
1193 
1194 	err = got_object_open_as_tree(&tree, repo, tree_id);
1195 	if (err)
1196 		goto done;
1197 	entries = got_object_tree_get_entries(tree);
1198 	te = SIMPLEQ_FIRST(&entries->head);
1199 	while (te) {
1200 		char *id = NULL;
1201 
1202 		if (sigint_received || sigpipe_received)
1203 			break;
1204 
1205 		if (show_ids) {
1206 			char *id_str;
1207 			err = got_object_id_str(&id_str, te->id);
1208 			if (err)
1209 				goto done;
1210 			if (asprintf(&id, "%s ", id_str) == -1) {
1211 				err = got_error_from_errno();
1212 				free(id_str);
1213 				goto done;
1214 			}
1215 			free(id_str);
1216 		}
1217 		print_entry(te, id, path, root_path);
1218 		free(id);
1219 
1220 		if (recurse && S_ISDIR(te->mode)) {
1221 			char *child_path;
1222 			if (asprintf(&child_path, "%s%s%s", path,
1223 			    path[0] == '/' && path[1] == '\0' ? "" : "/",
1224 			    te->name) == -1) {
1225 				err = got_error_from_errno();
1226 				goto done;
1227 			}
1228 			err = print_tree(child_path, commit_id, show_ids, 1,
1229 			    root_path, repo);
1230 			free(child_path);
1231 			if (err)
1232 				goto done;
1233 		}
1234 
1235 		te = SIMPLEQ_NEXT(te, entry);
1236 	}
1237 done:
1238 	if (tree)
1239 		got_object_tree_close(tree);
1240 	free(tree_id);
1241 	return err;
1242 }
1243 
1244 static const struct got_error *
1245 cmd_tree(int argc, char *argv[])
1246 {
1247 	const struct got_error *error;
1248 	struct got_repository *repo = NULL;
1249 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1250 	struct got_object_id *commit_id = NULL;
1251 	char *commit_id_str = NULL;
1252 	int show_ids = 0, recurse = 0;
1253 	int ch;
1254 
1255 #ifndef PROFILE
1256 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1257 	    NULL) == -1)
1258 		err(1, "pledge");
1259 #endif
1260 
1261 	while ((ch = getopt(argc, argv, "c:r:iR")) != -1) {
1262 		switch (ch) {
1263 		case 'c':
1264 			commit_id_str = optarg;
1265 			break;
1266 		case 'r':
1267 			repo_path = realpath(optarg, NULL);
1268 			if (repo_path == NULL)
1269 				err(1, "-r option");
1270 			break;
1271 		case 'i':
1272 			show_ids = 1;
1273 			break;
1274 		case 'R':
1275 			recurse = 1;
1276 			break;
1277 		default:
1278 			usage();
1279 			/* NOTREACHED */
1280 		}
1281 	}
1282 
1283 	argc -= optind;
1284 	argv += optind;
1285 
1286 	if (argc == 1)
1287 		path = argv[0];
1288 	else if (argc > 1)
1289 		usage_tree();
1290 	else
1291 		path = "/";
1292 
1293 	cwd = getcwd(NULL, 0);
1294 	if (cwd == NULL) {
1295 		error = got_error_from_errno();
1296 		goto done;
1297 	}
1298 	if (repo_path == NULL) {
1299 		repo_path = strdup(cwd);
1300 		if (repo_path == NULL) {
1301 			error = got_error_from_errno();
1302 			goto done;
1303 		}
1304 	}
1305 
1306 	error = apply_unveil(repo_path, NULL);
1307 	if (error)
1308 		goto done;
1309 
1310 	error = got_repo_open(&repo, repo_path);
1311 	if (error != NULL)
1312 		goto done;
1313 
1314 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
1315 	if (error != NULL)
1316 		goto done;
1317 
1318 	if (commit_id_str == NULL) {
1319 		struct got_reference *head_ref;
1320 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1321 		if (error != NULL)
1322 			goto done;
1323 		error = got_ref_resolve(&commit_id, repo, head_ref);
1324 		got_ref_close(head_ref);
1325 		if (error != NULL)
1326 			goto done;
1327 	} else {
1328 		error = got_object_resolve_id_str(&commit_id, repo,
1329 		    commit_id_str);
1330 		if (error != NULL)
1331 			goto done;
1332 	}
1333 
1334 	error = print_tree(in_repo_path, commit_id, show_ids, recurse,
1335 	    in_repo_path, repo);
1336 done:
1337 	free(in_repo_path);
1338 	free(repo_path);
1339 	free(cwd);
1340 	free(commit_id);
1341 	if (repo) {
1342 		const struct got_error *repo_error;
1343 		repo_error = got_repo_close(repo);
1344 		if (error == NULL)
1345 			error = repo_error;
1346 	}
1347 	return error;
1348 }
1349 
1350 #ifdef notyet
1351 static const struct got_error *
1352 cmd_status(int argc __unused, char *argv[] __unused)
1353 {
1354 	git_repository *repo = NULL;
1355 	git_status_list *status;
1356 	git_status_options statusopts;
1357 	size_t i;
1358 
1359 	git_libgit2_init();
1360 
1361 	if (git_repository_open_ext(&repo, ".", 0, NULL))
1362 		errx(1, "git_repository_open: %s", giterr_last()->message);
1363 
1364 	if (git_repository_is_bare(repo))
1365 		errx(1, "bar repository");
1366 
1367 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
1368 		errx(1, "git_status_init_options: %s", giterr_last()->message);
1369 
1370 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
1371 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
1372 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
1373 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
1374 
1375 	if (git_status_list_new(&status, repo, &statusopts))
1376 		errx(1, "git_status_list_new: %s", giterr_last()->message);
1377 
1378 	for (i = 0; i < git_status_list_entrycount(status); i++) {
1379 		const git_status_entry *se;
1380 
1381 		se = git_status_byindex(status, i);
1382 		switch (se->status) {
1383 		case GIT_STATUS_WT_NEW:
1384 			printf("? %s\n", se->index_to_workdir->new_file.path);
1385 			break;
1386 		case GIT_STATUS_WT_MODIFIED:
1387 			printf("M %s\n", se->index_to_workdir->new_file.path);
1388 			break;
1389 		case GIT_STATUS_WT_DELETED:
1390 			printf("R %s\n", se->index_to_workdir->new_file.path);
1391 			break;
1392 		case GIT_STATUS_WT_RENAMED:
1393 			printf("m %s -> %s\n",
1394 			    se->index_to_workdir->old_file.path,
1395 			    se->index_to_workdir->new_file.path);
1396 			break;
1397 		case GIT_STATUS_WT_TYPECHANGE:
1398 			printf("t %s\n", se->index_to_workdir->new_file.path);
1399 			break;
1400 		case GIT_STATUS_INDEX_NEW:
1401 			printf("A %s\n", se->head_to_index->new_file.path);
1402 			break;
1403 		case GIT_STATUS_INDEX_MODIFIED:
1404 			printf("M %s\n", se->head_to_index->old_file.path);
1405 			break;
1406 		case GIT_STATUS_INDEX_DELETED:
1407 			printf("R %s\n", se->head_to_index->old_file.path);
1408 			break;
1409 		case GIT_STATUS_INDEX_RENAMED:
1410 			printf("m %s -> %s\n",
1411 			    se->head_to_index->old_file.path,
1412 			    se->head_to_index->new_file.path);
1413 			break;
1414 		case GIT_STATUS_INDEX_TYPECHANGE:
1415 			printf("t %s\n", se->head_to_index->old_file.path);
1416 			break;
1417 		case GIT_STATUS_CURRENT:
1418 		default:
1419 			break;
1420 		}
1421 	}
1422 
1423 	git_status_list_free(status);
1424 	git_repository_free(repo);
1425 	git_libgit2_shutdown();
1426 
1427 	return 0;
1428 }
1429 #endif