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 {
615 	const struct got_error *err = NULL;
616 	char *id_str, *datestr, *logmsg0, *logmsg, *line;
617 	char datebuf[26];
618 	time_t committer_time;
619 	const char *author, *committer;
620 
621 	err = got_object_id_str(&id_str, id);
622 	if (err)
623 		return err;
624 
625 	printf("-----------------------------------------------\n");
626 	printf("commit %s\n", id_str);
627 	free(id_str);
628 	printf("from: %s\n", got_object_commit_get_author(commit));
629 	committer_time = got_object_commit_get_committer_time(commit);
630 	datestr = get_datestr(&committer_time, datebuf);
631 	printf("date: %s UTC\n", datestr);
632 	author = got_object_commit_get_author(commit);
633 	committer = got_object_commit_get_committer(commit);
634 	if (strcmp(author, committer) != 0)
635 		printf("via: %s\n", committer);
636 	if (got_object_commit_get_nparents(commit) > 1) {
637 		const struct got_object_id_queue *parent_ids;
638 		struct got_object_qid *qid;
639 		int n = 1;
640 		parent_ids = got_object_commit_get_parent_ids(commit);
641 		SIMPLEQ_FOREACH(qid, parent_ids, entry) {
642 			err = got_object_id_str(&id_str, qid->id);
643 			if (err)
644 				return err;
645 			printf("parent %d: %s\n", n++, id_str);
646 			free(id_str);
647 		}
648 	}
649 
650 	logmsg0 = strdup(got_object_commit_get_logmsg(commit));
651 	if (logmsg0 == NULL)
652 		return got_error_from_errno();
653 
654 	logmsg = logmsg0;
655 	do {
656 		line = strsep(&logmsg, "\n");
657 		if (line)
658 			printf(" %s\n", line);
659 	} while (line);
660 	free(logmsg0);
661 
662 	if (show_patch) {
663 		err = print_patch(commit, id, diff_context, repo);
664 		if (err == 0)
665 			printf("\n");
666 	}
667 
668 	fflush(stdout);
669 	return err;
670 }
671 
672 static const struct got_error *
673 print_commits(struct got_object_id *root_id, struct got_repository *repo,
674     char *path, int show_patch, int diff_context, int limit,
675     int first_parent_traversal)
676 {
677 	const struct got_error *err;
678 	struct got_commit_graph *graph;
679 
680 	err = got_commit_graph_open(&graph, root_id, path,
681 	    first_parent_traversal, repo);
682 	if (err)
683 		return err;
684 	err = got_commit_graph_iter_start(graph, root_id, repo);
685 	if (err)
686 		goto done;
687 	while (1) {
688 		struct got_commit_object *commit;
689 		struct got_object_id *id;
690 
691 		if (sigint_received || sigpipe_received)
692 			break;
693 
694 		err = got_commit_graph_iter_next(&id, graph);
695 		if (err) {
696 			if (err->code == GOT_ERR_ITER_COMPLETED) {
697 				err = NULL;
698 				break;
699 			}
700 			if (err->code != GOT_ERR_ITER_NEED_MORE)
701 				break;
702 			err = got_commit_graph_fetch_commits(graph, 1, repo);
703 			if (err)
704 				break;
705 			else
706 				continue;
707 		}
708 		if (id == NULL)
709 			break;
710 
711 		err = got_object_open_as_commit(&commit, repo, id);
712 		if (err)
713 			break;
714 		err = print_commit(commit, id, repo, show_patch, diff_context);
715 		got_object_commit_close(commit);
716 		if (err || (limit && --limit == 0))
717 			break;
718 	}
719 done:
720 	got_commit_graph_close(graph);
721 	return err;
722 }
723 
724 __dead static void
725 usage_log(void)
726 {
727 	fprintf(stderr, "usage: %s log [-c commit] [-C number] [-f] [ -l N ] [-p] "
728 	    "[-r repository-path] [path]\n", getprogname());
729 	exit(1);
730 }
731 
732 static const struct got_error *
733 cmd_log(int argc, char *argv[])
734 {
735 	const struct got_error *error;
736 	struct got_repository *repo = NULL;
737 	struct got_commit_object *commit = NULL;
738 	struct got_object_id *id = NULL;
739 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
740 	char *start_commit = NULL;
741 	int diff_context = 3, ch;
742 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
743 	const char *errstr;
744 
745 #ifndef PROFILE
746 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
747 	    NULL)
748 	    == -1)
749 		err(1, "pledge");
750 #endif
751 
752 	while ((ch = getopt(argc, argv, "pc:C:l:fr:")) != -1) {
753 		switch (ch) {
754 		case 'p':
755 			show_patch = 1;
756 			break;
757 		case 'c':
758 			start_commit = optarg;
759 			break;
760 		case 'C':
761 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
762 			    &errstr);
763 			if (errstr != NULL)
764 				err(1, "-C option %s", errstr);
765 			break;
766 		case 'l':
767 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
768 			if (errstr != NULL)
769 				err(1, "-l option %s", errstr);
770 			break;
771 		case 'f':
772 			first_parent_traversal = 1;
773 			break;
774 		case 'r':
775 			repo_path = realpath(optarg, NULL);
776 			if (repo_path == NULL)
777 				err(1, "-r option");
778 			break;
779 		default:
780 			usage();
781 			/* NOTREACHED */
782 		}
783 	}
784 
785 	argc -= optind;
786 	argv += optind;
787 
788 	if (argc == 0)
789 		path = strdup("");
790 	else if (argc == 1)
791 		path = strdup(argv[0]);
792 	else
793 		usage_log();
794 	if (path == NULL)
795 		return got_error_from_errno();
796 
797 	cwd = getcwd(NULL, 0);
798 	if (cwd == NULL) {
799 		error = got_error_from_errno();
800 		goto done;
801 	}
802 	if (repo_path == NULL) {
803 		repo_path = strdup(cwd);
804 		if (repo_path == NULL) {
805 			error = got_error_from_errno();
806 			goto done;
807 		}
808 	}
809 
810 	error = apply_unveil(repo_path, NULL);
811 	if (error)
812 		goto done;
813 
814 	error = got_repo_open(&repo, repo_path);
815 	if (error != NULL)
816 		goto done;
817 
818 	if (start_commit == NULL) {
819 		struct got_reference *head_ref;
820 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
821 		if (error != NULL)
822 			return error;
823 		error = got_ref_resolve(&id, repo, head_ref);
824 		got_ref_close(head_ref);
825 		if (error != NULL)
826 			return error;
827 		error = got_object_open_as_commit(&commit, repo, id);
828 	} else {
829 		struct got_reference *ref;
830 		error = got_ref_open(&ref, repo, start_commit);
831 		if (error == NULL) {
832 			int obj_type;
833 			error = got_ref_resolve(&id, repo, ref);
834 			got_ref_close(ref);
835 			if (error != NULL)
836 				goto done;
837 			error = got_object_get_type(&obj_type, repo, id);
838 			if (error != NULL)
839 				goto done;
840 			if (obj_type == GOT_OBJ_TYPE_TAG) {
841 				struct got_tag_object *tag;
842 				error = got_object_open_as_tag(&tag, repo, id);
843 				if (error != NULL)
844 					goto done;
845 				if (got_object_tag_get_object_type(tag) !=
846 				    GOT_OBJ_TYPE_COMMIT) {
847 					got_object_tag_close(tag);
848 					error = got_error(GOT_ERR_OBJ_TYPE);
849 					goto done;
850 				}
851 				free(id);
852 				id = got_object_id_dup(
853 				    got_object_tag_get_object_id(tag));
854 				if (id == NULL)
855 					error = got_error_from_errno();
856 				got_object_tag_close(tag);
857 				if (error)
858 					goto done;
859 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
860 				error = got_error(GOT_ERR_OBJ_TYPE);
861 				goto done;
862 			}
863 			error = got_object_open_as_commit(&commit, repo, id);
864 			if (error != NULL)
865 				goto done;
866 		}
867 		if (commit == NULL) {
868 			error = got_object_resolve_id_str(&id, repo,
869 			    start_commit);
870 			if (error != NULL)
871 				return error;
872 		}
873 	}
874 	if (error != NULL)
875 		goto done;
876 
877 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
878 	if (error != NULL)
879 		goto done;
880 	if (in_repo_path) {
881 		free(path);
882 		path = in_repo_path;
883 	}
884 
885 	error = print_commits(id, repo, path, show_patch,
886 	    diff_context, limit, first_parent_traversal);
887 done:
888 	free(path);
889 	free(repo_path);
890 	free(cwd);
891 	free(id);
892 	if (repo) {
893 		const struct got_error *repo_error;
894 		repo_error = got_repo_close(repo);
895 		if (error == NULL)
896 			error = repo_error;
897 	}
898 	return error;
899 }
900 
901 __dead static void
902 usage_diff(void)
903 {
904 	fprintf(stderr, "usage: %s diff [-C number] [repository-path] "
905 	    "object1 object2\n", getprogname());
906 	exit(1);
907 }
908 
909 static const struct got_error *
910 cmd_diff(int argc, char *argv[])
911 {
912 	const struct got_error *error;
913 	struct got_repository *repo = NULL;
914 	char *repo_path = NULL;
915 	struct got_object_id *id1 = NULL, *id2 = NULL;
916 	char *id_str1 = NULL, *id_str2 = NULL;
917 	int type1, type2;
918 	int diff_context = 3, ch;
919 	const char *errstr;
920 
921 #ifndef PROFILE
922 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
923 	    NULL) == -1)
924 		err(1, "pledge");
925 #endif
926 
927 	while ((ch = getopt(argc, argv, "C:")) != -1) {
928 		switch (ch) {
929 		case 'C':
930 			diff_context = strtonum(optarg, 1, INT_MAX, &errstr);
931 			if (errstr != NULL)
932 				err(1, "-C option %s", errstr);
933 			break;
934 		default:
935 			usage();
936 			/* NOTREACHED */
937 		}
938 	}
939 
940 	argc -= optind;
941 	argv += optind;
942 
943 	if (argc == 0) {
944 		usage_diff(); /* TODO show local worktree changes */
945 	} else if (argc == 2) {
946 		repo_path = getcwd(NULL, 0);
947 		if (repo_path == NULL)
948 			return got_error_from_errno();
949 		id_str1 = argv[0];
950 		id_str2 = argv[1];
951 	} else if (argc == 3) {
952 		repo_path = realpath(argv[0], NULL);
953 		if (repo_path == NULL)
954 			return got_error_from_errno();
955 		id_str1 = argv[1];
956 		id_str2 = argv[2];
957 	} else
958 		usage_diff();
959 
960 	error = apply_unveil(repo_path, NULL);
961 	if (error)
962 		goto done;
963 
964 	error = got_repo_open(&repo, repo_path);
965 	free(repo_path);
966 	if (error != NULL)
967 		goto done;
968 
969 	error = got_object_resolve_id_str(&id1, repo, id_str1);
970 	if (error)
971 		goto done;
972 
973 	error = got_object_resolve_id_str(&id2, repo, id_str2);
974 	if (error)
975 		goto done;
976 
977 	error = got_object_get_type(&type1, repo, id1);
978 	if (error)
979 		goto done;
980 
981 	error = got_object_get_type(&type2, repo, id2);
982 	if (error)
983 		goto done;
984 
985 	if (type1 != type2) {
986 		error = got_error(GOT_ERR_OBJ_TYPE);
987 		goto done;
988 	}
989 
990 	switch (type1) {
991 	case GOT_OBJ_TYPE_BLOB:
992 		error = got_diff_objects_as_blobs(id1, id2, NULL, NULL,
993 		    diff_context, repo, stdout);
994 		break;
995 	case GOT_OBJ_TYPE_TREE:
996 		error = got_diff_objects_as_trees(id1, id2, "", "",
997 		    diff_context, repo, stdout);
998 		break;
999 	case GOT_OBJ_TYPE_COMMIT:
1000 		printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null",
1001 		    id_str2);
1002 		error = got_diff_objects_as_commits(id1, id2, diff_context,
1003 		    repo, stdout);
1004 		break;
1005 	default:
1006 		error = got_error(GOT_ERR_OBJ_TYPE);
1007 	}
1008 
1009 done:
1010 	free(id1);
1011 	free(id2);
1012 	if (repo) {
1013 		const struct got_error *repo_error;
1014 		repo_error = got_repo_close(repo);
1015 		if (error == NULL)
1016 			error = repo_error;
1017 	}
1018 	return error;
1019 }
1020 
1021 __dead static void
1022 usage_blame(void)
1023 {
1024 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
1025 	    getprogname());
1026 	exit(1);
1027 }
1028 
1029 static const struct got_error *
1030 cmd_blame(int argc, char *argv[])
1031 {
1032 	const struct got_error *error;
1033 	struct got_repository *repo = NULL;
1034 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1035 	struct got_object_id *commit_id = NULL;
1036 	char *commit_id_str = NULL;
1037 	int ch;
1038 
1039 #ifndef PROFILE
1040 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1041 	    NULL) == -1)
1042 		err(1, "pledge");
1043 #endif
1044 
1045 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
1046 		switch (ch) {
1047 		case 'c':
1048 			commit_id_str = optarg;
1049 			break;
1050 		case 'r':
1051 			repo_path = realpath(optarg, NULL);
1052 			if (repo_path == NULL)
1053 				err(1, "-r option");
1054 			break;
1055 		default:
1056 			usage();
1057 			/* NOTREACHED */
1058 		}
1059 	}
1060 
1061 	argc -= optind;
1062 	argv += optind;
1063 
1064 	if (argc == 1)
1065 		path = argv[0];
1066 	else
1067 		usage_blame();
1068 
1069 	cwd = getcwd(NULL, 0);
1070 	if (cwd == NULL) {
1071 		error = got_error_from_errno();
1072 		goto done;
1073 	}
1074 	if (repo_path == NULL) {
1075 		repo_path = strdup(cwd);
1076 		if (repo_path == NULL) {
1077 			error = got_error_from_errno();
1078 			goto done;
1079 		}
1080 	}
1081 
1082 	error = apply_unveil(repo_path, NULL);
1083 	if (error)
1084 		goto done;
1085 
1086 	error = got_repo_open(&repo, repo_path);
1087 	if (error != NULL)
1088 		goto done;
1089 
1090 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
1091 	if (error != NULL)
1092 		goto done;
1093 
1094 	if (commit_id_str == NULL) {
1095 		struct got_reference *head_ref;
1096 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1097 		if (error != NULL)
1098 			goto done;
1099 		error = got_ref_resolve(&commit_id, repo, head_ref);
1100 		got_ref_close(head_ref);
1101 		if (error != NULL)
1102 			goto done;
1103 	} else {
1104 		error = got_object_resolve_id_str(&commit_id, repo,
1105 		    commit_id_str);
1106 		if (error != NULL)
1107 			goto done;
1108 	}
1109 
1110 	error = got_blame(in_repo_path, commit_id, repo, stdout);
1111 done:
1112 	free(in_repo_path);
1113 	free(repo_path);
1114 	free(cwd);
1115 	free(commit_id);
1116 	if (repo) {
1117 		const struct got_error *repo_error;
1118 		repo_error = got_repo_close(repo);
1119 		if (error == NULL)
1120 			error = repo_error;
1121 	}
1122 	return error;
1123 }
1124 
1125 __dead static void
1126 usage_tree(void)
1127 {
1128 	fprintf(stderr,
1129 	    "usage: %s tree [-c commit] [-r repository-path] [-iR] path\n",
1130 	    getprogname());
1131 	exit(1);
1132 }
1133 
1134 static void
1135 print_entry(struct got_tree_entry *te, const char *id, const char *path,
1136     const char *root_path)
1137 {
1138 	int is_root_path = (strcmp(path, root_path) == 0);
1139 
1140 	path += strlen(root_path);
1141 	while (path[0] == '/')
1142 		path++;
1143 
1144 	printf("%s%s%s%s%s\n", id ? id : "", path,
1145 	    is_root_path ? "" : "/",
1146 	    te->name, S_ISDIR(te->mode) ? "/" : "");
1147 }
1148 
1149 static const struct got_error *
1150 print_tree(const char *path, struct got_object_id *commit_id,
1151     int show_ids, int recurse, const char *root_path,
1152     struct got_repository *repo)
1153 {
1154 	const struct got_error *err = NULL;
1155 	struct got_object_id *tree_id = NULL;
1156 	struct got_tree_object *tree = NULL;
1157 	const struct got_tree_entries *entries;
1158 	struct got_tree_entry *te;
1159 
1160 	err = got_object_id_by_path(&tree_id, repo, commit_id, path);
1161 	if (err)
1162 		goto done;
1163 
1164 	err = got_object_open_as_tree(&tree, repo, tree_id);
1165 	if (err)
1166 		goto done;
1167 	entries = got_object_tree_get_entries(tree);
1168 	te = SIMPLEQ_FIRST(&entries->head);
1169 	while (te) {
1170 		char *id = NULL;
1171 
1172 		if (sigint_received || sigpipe_received)
1173 			break;
1174 
1175 		if (show_ids) {
1176 			char *id_str;
1177 			err = got_object_id_str(&id_str, te->id);
1178 			if (err)
1179 				goto done;
1180 			if (asprintf(&id, "%s ", id_str) == -1) {
1181 				err = got_error_from_errno();
1182 				free(id_str);
1183 				goto done;
1184 			}
1185 			free(id_str);
1186 		}
1187 		print_entry(te, id, path, root_path);
1188 		free(id);
1189 
1190 		if (recurse && S_ISDIR(te->mode)) {
1191 			char *child_path;
1192 			if (asprintf(&child_path, "%s%s%s", path,
1193 			    path[0] == '/' && path[1] == '\0' ? "" : "/",
1194 			    te->name) == -1) {
1195 				err = got_error_from_errno();
1196 				goto done;
1197 			}
1198 			err = print_tree(child_path, commit_id, show_ids, 1,
1199 			    root_path, repo);
1200 			free(child_path);
1201 			if (err)
1202 				goto done;
1203 		}
1204 
1205 		te = SIMPLEQ_NEXT(te, entry);
1206 	}
1207 done:
1208 	if (tree)
1209 		got_object_tree_close(tree);
1210 	free(tree_id);
1211 	return err;
1212 }
1213 
1214 static const struct got_error *
1215 cmd_tree(int argc, char *argv[])
1216 {
1217 	const struct got_error *error;
1218 	struct got_repository *repo = NULL;
1219 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1220 	struct got_object_id *commit_id = NULL;
1221 	char *commit_id_str = NULL;
1222 	int show_ids = 0, recurse = 0;
1223 	int ch;
1224 
1225 #ifndef PROFILE
1226 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd unveil",
1227 	    NULL) == -1)
1228 		err(1, "pledge");
1229 #endif
1230 
1231 	while ((ch = getopt(argc, argv, "c:r:iR")) != -1) {
1232 		switch (ch) {
1233 		case 'c':
1234 			commit_id_str = optarg;
1235 			break;
1236 		case 'r':
1237 			repo_path = realpath(optarg, NULL);
1238 			if (repo_path == NULL)
1239 				err(1, "-r option");
1240 			break;
1241 		case 'i':
1242 			show_ids = 1;
1243 			break;
1244 		case 'R':
1245 			recurse = 1;
1246 			break;
1247 		default:
1248 			usage();
1249 			/* NOTREACHED */
1250 		}
1251 	}
1252 
1253 	argc -= optind;
1254 	argv += optind;
1255 
1256 	if (argc == 1)
1257 		path = argv[0];
1258 	else if (argc > 1)
1259 		usage_tree();
1260 	else
1261 		path = "/";
1262 
1263 	cwd = getcwd(NULL, 0);
1264 	if (cwd == NULL) {
1265 		error = got_error_from_errno();
1266 		goto done;
1267 	}
1268 	if (repo_path == NULL) {
1269 		repo_path = strdup(cwd);
1270 		if (repo_path == NULL) {
1271 			error = got_error_from_errno();
1272 			goto done;
1273 		}
1274 	}
1275 
1276 	error = apply_unveil(repo_path, NULL);
1277 	if (error)
1278 		goto done;
1279 
1280 	error = got_repo_open(&repo, repo_path);
1281 	if (error != NULL)
1282 		goto done;
1283 
1284 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
1285 	if (error != NULL)
1286 		goto done;
1287 
1288 	if (commit_id_str == NULL) {
1289 		struct got_reference *head_ref;
1290 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1291 		if (error != NULL)
1292 			goto done;
1293 		error = got_ref_resolve(&commit_id, repo, head_ref);
1294 		got_ref_close(head_ref);
1295 		if (error != NULL)
1296 			goto done;
1297 	} else {
1298 		error = got_object_resolve_id_str(&commit_id, repo,
1299 		    commit_id_str);
1300 		if (error != NULL)
1301 			goto done;
1302 	}
1303 
1304 	error = print_tree(in_repo_path, commit_id, show_ids, recurse,
1305 	    in_repo_path, repo);
1306 done:
1307 	free(in_repo_path);
1308 	free(repo_path);
1309 	free(cwd);
1310 	free(commit_id);
1311 	if (repo) {
1312 		const struct got_error *repo_error;
1313 		repo_error = got_repo_close(repo);
1314 		if (error == NULL)
1315 			error = repo_error;
1316 	}
1317 	return error;
1318 }
1319 
1320 #ifdef notyet
1321 static const struct got_error *
1322 cmd_status(int argc __unused, char *argv[] __unused)
1323 {
1324 	git_repository *repo = NULL;
1325 	git_status_list *status;
1326 	git_status_options statusopts;
1327 	size_t i;
1328 
1329 	git_libgit2_init();
1330 
1331 	if (git_repository_open_ext(&repo, ".", 0, NULL))
1332 		errx(1, "git_repository_open: %s", giterr_last()->message);
1333 
1334 	if (git_repository_is_bare(repo))
1335 		errx(1, "bar repository");
1336 
1337 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
1338 		errx(1, "git_status_init_options: %s", giterr_last()->message);
1339 
1340 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
1341 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
1342 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
1343 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
1344 
1345 	if (git_status_list_new(&status, repo, &statusopts))
1346 		errx(1, "git_status_list_new: %s", giterr_last()->message);
1347 
1348 	for (i = 0; i < git_status_list_entrycount(status); i++) {
1349 		const git_status_entry *se;
1350 
1351 		se = git_status_byindex(status, i);
1352 		switch (se->status) {
1353 		case GIT_STATUS_WT_NEW:
1354 			printf("? %s\n", se->index_to_workdir->new_file.path);
1355 			break;
1356 		case GIT_STATUS_WT_MODIFIED:
1357 			printf("M %s\n", se->index_to_workdir->new_file.path);
1358 			break;
1359 		case GIT_STATUS_WT_DELETED:
1360 			printf("R %s\n", se->index_to_workdir->new_file.path);
1361 			break;
1362 		case GIT_STATUS_WT_RENAMED:
1363 			printf("m %s -> %s\n",
1364 			    se->index_to_workdir->old_file.path,
1365 			    se->index_to_workdir->new_file.path);
1366 			break;
1367 		case GIT_STATUS_WT_TYPECHANGE:
1368 			printf("t %s\n", se->index_to_workdir->new_file.path);
1369 			break;
1370 		case GIT_STATUS_INDEX_NEW:
1371 			printf("A %s\n", se->head_to_index->new_file.path);
1372 			break;
1373 		case GIT_STATUS_INDEX_MODIFIED:
1374 			printf("M %s\n", se->head_to_index->old_file.path);
1375 			break;
1376 		case GIT_STATUS_INDEX_DELETED:
1377 			printf("R %s\n", se->head_to_index->old_file.path);
1378 			break;
1379 		case GIT_STATUS_INDEX_RENAMED:
1380 			printf("m %s -> %s\n",
1381 			    se->head_to_index->old_file.path,
1382 			    se->head_to_index->new_file.path);
1383 			break;
1384 		case GIT_STATUS_INDEX_TYPECHANGE:
1385 			printf("t %s\n", se->head_to_index->old_file.path);
1386 			break;
1387 		case GIT_STATUS_CURRENT:
1388 		default:
1389 			break;
1390 		}
1391 	}
1392 
1393 	git_status_list_free(status);
1394 	git_repository_free(repo);
1395 	git_libgit2_shutdown();
1396 
1397 	return 0;
1398 }
1399 #endif