1 /*
2  * Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
3  * Copyright (c) 2018 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 
43 #ifndef nitems
44 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
45 #endif
46 
47 static volatile sig_atomic_t sigint_received;
48 static volatile sig_atomic_t sigpipe_received;
49 
50 static void
51 catch_sigint(int signo)
52 {
53 	sigint_received = 1;
54 }
55 
56 static void
57 catch_sigpipe(int signo)
58 {
59 	sigpipe_received = 1;
60 }
61 
62 
63 struct cmd {
64 	const char	 *cmd_name;
65 	const struct got_error *(*cmd_main)(int, char *[]);
66 	void		(*cmd_usage)(void);
67 	const char	 *cmd_descr;
68 };
69 
70 __dead static void	usage(void);
71 __dead static void	usage_checkout(void);
72 __dead static void	usage_update(void);
73 __dead static void	usage_log(void);
74 __dead static void	usage_diff(void);
75 __dead static void	usage_blame(void);
76 __dead static void	usage_tree(void);
77 
78 static const struct got_error*		cmd_checkout(int, char *[]);
79 static const struct got_error*		cmd_update(int, char *[]);
80 static const struct got_error*		cmd_log(int, char *[]);
81 static const struct got_error*		cmd_diff(int, char *[]);
82 static const struct got_error*		cmd_blame(int, char *[]);
83 static const struct got_error*		cmd_tree(int, char *[]);
84 #ifdef notyet
85 static const struct got_error*		cmd_status(int, char *[]);
86 #endif
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 #ifdef notyet
102 	{ "status",	cmd_status,	usage_status,
103 	    "show modification status of files" },
104 #endif
105 };
106 
107 int
108 main(int argc, char *argv[])
109 {
110 	struct cmd *cmd;
111 	unsigned int i;
112 	int ch;
113 	int hflag = 0;
114 
115 	setlocale(LC_ALL, "");
116 
117 	while ((ch = getopt(argc, argv, "h")) != -1) {
118 		switch (ch) {
119 		case 'h':
120 			hflag = 1;
121 			break;
122 		default:
123 			usage();
124 			/* NOTREACHED */
125 		}
126 	}
127 
128 	argc -= optind;
129 	argv += optind;
130 	optind = 0;
131 
132 	if (argc <= 0)
133 		usage();
134 
135 	signal(SIGINT, catch_sigint);
136 	signal(SIGPIPE, catch_sigpipe);
137 
138 	for (i = 0; i < nitems(got_commands); i++) {
139 		const struct got_error *error;
140 
141 		cmd = &got_commands[i];
142 
143 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
144 			continue;
145 
146 		if (hflag)
147 			got_commands[i].cmd_usage();
148 
149 		error = got_commands[i].cmd_main(argc, argv);
150 		if (error && !(sigint_received || sigpipe_received)) {
151 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
152 			return 1;
153 		}
154 
155 		return 0;
156 	}
157 
158 	fprintf(stderr, "%s: unknown command '%s'\n", getprogname(), argv[0]);
159 	return 1;
160 }
161 
162 __dead static void
163 usage(void)
164 {
165 	int i;
166 
167 	fprintf(stderr, "usage: %s [-h] command [arg ...]\n\n"
168 	    "Available commands:\n", getprogname());
169 	for (i = 0; i < nitems(got_commands); i++) {
170 		struct cmd *cmd = &got_commands[i];
171 		fprintf(stderr, "    %s: %s\n", cmd->cmd_name, cmd->cmd_descr);
172 	}
173 	exit(1);
174 }
175 
176 __dead static void
177 usage_checkout(void)
178 {
179 	fprintf(stderr, "usage: %s checkout [-p prefix] repository-path "
180 	    "[worktree-path]\n", getprogname());
181 	exit(1);
182 }
183 
184 static void
185 checkout_progress(void *arg, unsigned char status, const char *path)
186 {
187 	char *worktree_path = arg;
188 
189 	while (path[0] == '/')
190 		path++;
191 
192 	printf("%c  %s/%s\n", status, worktree_path, path);
193 }
194 
195 static const struct got_error *
196 checkout_cancel(void *arg)
197 {
198 	if (sigint_received || sigpipe_received)
199 		return got_error(GOT_ERR_CANCELLED);
200 	return NULL;
201 }
202 
203 static const struct got_error *
204 cmd_checkout(int argc, char *argv[])
205 {
206 	const struct got_error *error = NULL;
207 	struct got_repository *repo = NULL;
208 	struct got_reference *head_ref = NULL;
209 	struct got_worktree *worktree = NULL;
210 	char *repo_path = NULL;
211 	char *worktree_path = NULL;
212 	const char *path_prefix = "";
213 	int ch, same_path_prefix;
214 
215 	while ((ch = getopt(argc, argv, "p:")) != -1) {
216 		switch (ch) {
217 		case 'p':
218 			path_prefix = optarg;
219 			break;
220 		default:
221 			usage();
222 			/* NOTREACHED */
223 		}
224 	}
225 
226 	argc -= optind;
227 	argv += optind;
228 
229 #ifndef PROFILE
230 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
231 	    == -1)
232 		err(1, "pledge");
233 #endif
234 	if (argc == 1) {
235 		char *cwd, *base, *dotgit;
236 		repo_path = realpath(argv[0], NULL);
237 		if (repo_path == NULL)
238 			return got_error_from_errno();
239 		cwd = getcwd(NULL, 0);
240 		if (cwd == NULL) {
241 			error = got_error_from_errno();
242 			goto done;
243 		}
244 		if (path_prefix[0])
245 			base = basename(path_prefix);
246 		else
247 			base = basename(repo_path);
248 		if (base == NULL) {
249 			error = got_error_from_errno();
250 			goto done;
251 		}
252 		dotgit = strstr(base, ".git");
253 		if (dotgit)
254 			*dotgit = '\0';
255 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
256 			error = got_error_from_errno();
257 			free(cwd);
258 			goto done;
259 		}
260 		free(cwd);
261 	} else if (argc == 2) {
262 		repo_path = realpath(argv[0], NULL);
263 		if (repo_path == NULL) {
264 			error = got_error_from_errno();
265 			goto done;
266 		}
267 		worktree_path = realpath(argv[1], NULL);
268 		if (worktree_path == NULL) {
269 			error = got_error_from_errno();
270 			goto done;
271 		}
272 	} else
273 		usage_checkout();
274 
275 	error = got_repo_open(&repo, repo_path);
276 	if (error != NULL)
277 		goto done;
278 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
279 	if (error != NULL)
280 		goto done;
281 
282 	error = got_worktree_init(worktree_path, head_ref, path_prefix, repo);
283 	if (error != NULL && !(error->code == GOT_ERR_ERRNO && errno == EEXIST))
284 		goto done;
285 
286 	error = got_worktree_open(&worktree, worktree_path);
287 	if (error != NULL)
288 		goto done;
289 
290 	error = got_worktree_match_path_prefix(&same_path_prefix, worktree,
291 	    path_prefix);
292 	if (error != NULL)
293 		goto done;
294 	if (!same_path_prefix) {
295 		error = got_error(GOT_ERR_PATH_PREFIX);
296 		goto done;
297 	}
298 
299 	error = got_worktree_checkout_files(worktree, repo,
300 	    checkout_progress, worktree_path, checkout_cancel, NULL);
301 	if (error != NULL)
302 		goto done;
303 
304 	printf("Now shut up and hack\n");
305 
306 done:
307 	free(repo_path);
308 	free(worktree_path);
309 	return error;
310 }
311 
312 __dead static void
313 usage_update(void)
314 {
315 	fprintf(stderr, "usage: %s update [-c commit] [worktree-path]\n",
316 	    getprogname());
317 	exit(1);
318 }
319 
320 static void
321 update_progress(void *arg, unsigned char status, const char *path)
322 {
323 	if (status == GOT_STATUS_EXISTS)
324 		return;
325 
326 	while (path[0] == '/')
327 		path++;
328 	printf("%c  %s\n", status, path);
329 }
330 
331 static const struct got_error *
332 check_ancestry(struct got_worktree *worktree, struct got_object_id *commit_id,
333     struct got_repository *repo)
334 {
335 	const struct got_error *err;
336 	struct got_reference *head_ref = NULL;
337 	struct got_object_id *head_commit_id = NULL;
338 	struct got_commit_graph *graph = NULL;
339 
340 	head_ref = got_worktree_get_head_ref(worktree);
341 	if (head_ref == NULL)
342 		return got_error_from_errno();
343 
344 	err = got_ref_resolve(&head_commit_id, repo, head_ref);
345 	if (err)
346 		goto done;
347 
348 	err = got_commit_graph_open(&graph, head_commit_id, "/", 1, repo);
349 	if (err)
350 		goto done;
351 
352 	err = got_commit_graph_iter_start(graph, head_commit_id, repo);
353 	if (err)
354 		goto done;
355 	while (1) {
356 		struct got_object_id *id;
357 
358 		if (sigint_received || sigpipe_received)
359 			break;
360 
361 		err = got_commit_graph_iter_next(&id, graph);
362 		if (err) {
363 			if (err->code == GOT_ERR_ITER_COMPLETED) {
364 				err = got_error(GOT_ERR_ANCESTRY);
365 				break;
366 			}
367 			if (err->code != GOT_ERR_ITER_NEED_MORE)
368 				break;
369 			err = got_commit_graph_fetch_commits(graph, 1, repo);
370 			if (err)
371 				break;
372 			else
373 				continue;
374 		}
375 		if (id == NULL)
376 			break;
377 		if (got_object_id_cmp(id, commit_id) == 0)
378 			break;
379 	}
380 done:
381 	if (head_ref)
382 		got_ref_close(head_ref);
383 	if (graph)
384 		got_commit_graph_close(graph);
385 	return err;
386 }
387 
388 static const struct got_error *
389 cmd_update(int argc, char *argv[])
390 {
391 	const struct got_error *error = NULL;
392 	struct got_repository *repo = NULL;
393 	struct got_worktree *worktree = NULL;
394 	char *worktree_path = NULL;
395 	struct got_object_id *commit_id = NULL;
396 	const char *commit_id_str = NULL;
397 	int ch;
398 
399 	while ((ch = getopt(argc, argv, "c:")) != -1) {
400 		switch (ch) {
401 		case 'c':
402 			commit_id_str = optarg;
403 			break;
404 		default:
405 			usage();
406 			/* NOTREACHED */
407 		}
408 	}
409 
410 	argc -= optind;
411 	argv += optind;
412 
413 #ifndef PROFILE
414 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
415 	    == -1)
416 		err(1, "pledge");
417 #endif
418 	if (argc == 0) {
419 		worktree_path = getcwd(NULL, 0);
420 		if (worktree_path == NULL) {
421 			error = got_error_from_errno();
422 			goto done;
423 		}
424 	} else if (argc == 1) {
425 		worktree_path = realpath(argv[0], NULL);
426 		if (worktree_path == NULL) {
427 			error = got_error_from_errno();
428 			goto done;
429 		}
430 	} else
431 		usage_update();
432 
433 	error = got_worktree_open(&worktree, worktree_path);
434 	if (error != NULL)
435 		goto done;
436 
437 	error = got_repo_open(&repo, got_worktree_get_repo_path(worktree));
438 	if (error != NULL)
439 		goto done;
440 
441 	if (commit_id_str == NULL) {
442 		struct got_reference *head_ref;
443 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
444 		if (error != NULL)
445 			goto done;
446 		error = got_ref_resolve(&commit_id, repo, head_ref);
447 		if (error != NULL)
448 			goto done;
449 	} else {
450 		error = got_object_resolve_id_str(&commit_id, repo,
451 		    commit_id_str);
452 		if (error != NULL)
453 			goto done;
454 	}
455 
456 	error = check_ancestry(worktree, commit_id, repo);
457 	if (error != NULL)
458 		goto done;
459 
460 	if (got_object_id_cmp(got_worktree_get_base_commit_id(worktree),
461 	    commit_id) != 0) {
462 		error = got_worktree_set_base_commit_id(worktree, repo,
463 		    commit_id);
464 		if (error)
465 			goto done;
466 	}
467 
468 	error = got_worktree_checkout_files(worktree, repo,
469 	    update_progress, NULL, checkout_cancel, NULL);
470 	if (error != NULL)
471 		goto done;
472 done:
473 	free(worktree_path);
474 	free(commit_id);
475 	return error;
476 }
477 
478 static const struct got_error *
479 print_patch(struct got_commit_object *commit, struct got_object_id *id,
480     int diff_context, struct got_repository *repo)
481 {
482 	const struct got_error *err = NULL;
483 	struct got_tree_object *tree1 = NULL, *tree2;
484 	struct got_object_qid *qid;
485 	char *id_str1 = NULL, *id_str2;
486 
487 	err = got_object_open_as_tree(&tree2, repo,
488 	    got_object_commit_get_tree_id(commit));
489 	if (err)
490 		return err;
491 
492 	qid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit));
493 	if (qid != NULL) {
494 		struct got_commit_object *pcommit;
495 
496 		err = got_object_open_as_commit(&pcommit, repo, qid->id);
497 		if (err)
498 			return err;
499 
500 		err = got_object_open_as_tree(&tree1, repo,
501 		    got_object_commit_get_tree_id(pcommit));
502 		got_object_commit_close(pcommit);
503 		if (err)
504 			return err;
505 
506 		err = got_object_id_str(&id_str1, qid->id);
507 		if (err)
508 			return err;
509 	}
510 
511 	err = got_object_id_str(&id_str2, id);
512 	if (err)
513 		goto done;
514 
515 	printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null", id_str2);
516 	err = got_diff_tree(tree1, tree2, "", "", diff_context, repo, stdout);
517 done:
518 	if (tree1)
519 		got_object_tree_close(tree1);
520 	got_object_tree_close(tree2);
521 	free(id_str1);
522 	free(id_str2);
523 	return err;
524 }
525 
526 static char *
527 get_datestr(time_t *time, char *datebuf)
528 {
529 	char *p, *s = ctime_r(time, datebuf);
530 	p = strchr(s, '\n');
531 	if (p)
532 		*p = '\0';
533 	return s;
534 }
535 
536 static const struct got_error *
537 print_commit(struct got_commit_object *commit, struct got_object_id *id,
538     struct got_repository *repo, int show_patch, int diff_context)
539 {
540 	const struct got_error *err = NULL;
541 	char *id_str, *datestr, *logmsg0, *logmsg, *line;
542 	char datebuf[26];
543 	time_t committer_time;
544 	const char *author, *committer;
545 
546 	err = got_object_id_str(&id_str, id);
547 	if (err)
548 		return err;
549 
550 	printf("-----------------------------------------------\n");
551 	printf("commit %s\n", id_str);
552 	free(id_str);
553 	printf("from: %s\n", got_object_commit_get_author(commit));
554 	committer_time = got_object_commit_get_committer_time(commit);
555 	datestr = get_datestr(&committer_time, datebuf);
556 	printf("date: %s UTC\n", datestr);
557 	author = got_object_commit_get_author(commit);
558 	committer = got_object_commit_get_committer(commit);
559 	if (strcmp(author, committer) != 0)
560 		printf("via: %s\n", committer);
561 	if (got_object_commit_get_nparents(commit) > 1) {
562 		const struct got_object_id_queue *parent_ids;
563 		struct got_object_qid *qid;
564 		int n = 1;
565 		parent_ids = got_object_commit_get_parent_ids(commit);
566 		SIMPLEQ_FOREACH(qid, parent_ids, entry) {
567 			err = got_object_id_str(&id_str, qid->id);
568 			if (err)
569 				return err;
570 			printf("parent %d: %s\n", n++, id_str);
571 			free(id_str);
572 		}
573 	}
574 
575 	logmsg0 = strdup(got_object_commit_get_logmsg(commit));
576 	if (logmsg0 == NULL)
577 		return got_error_from_errno();
578 
579 	logmsg = logmsg0;
580 	do {
581 		line = strsep(&logmsg, "\n");
582 		if (line)
583 			printf(" %s\n", line);
584 	} while (line);
585 	free(logmsg0);
586 
587 	if (show_patch) {
588 		err = print_patch(commit, id, diff_context, repo);
589 		if (err == 0)
590 			printf("\n");
591 	}
592 
593 	fflush(stdout);
594 	return err;
595 }
596 
597 static const struct got_error *
598 print_commits(struct got_object_id *root_id, struct got_repository *repo,
599     char *path, int show_patch, int diff_context, int limit,
600     int first_parent_traversal)
601 {
602 	const struct got_error *err;
603 	struct got_commit_graph *graph;
604 
605 	err = got_commit_graph_open(&graph, root_id, path,
606 	    first_parent_traversal, repo);
607 	if (err)
608 		return err;
609 	err = got_commit_graph_iter_start(graph, root_id, repo);
610 	if (err)
611 		goto done;
612 	while (1) {
613 		struct got_commit_object *commit;
614 		struct got_object_id *id;
615 
616 		if (sigint_received || sigpipe_received)
617 			break;
618 
619 		err = got_commit_graph_iter_next(&id, graph);
620 		if (err) {
621 			if (err->code == GOT_ERR_ITER_COMPLETED) {
622 				err = NULL;
623 				break;
624 			}
625 			if (err->code != GOT_ERR_ITER_NEED_MORE)
626 				break;
627 			err = got_commit_graph_fetch_commits(graph, 1, repo);
628 			if (err)
629 				break;
630 			else
631 				continue;
632 		}
633 		if (id == NULL)
634 			break;
635 
636 		err = got_object_open_as_commit(&commit, repo, id);
637 		if (err)
638 			break;
639 		err = print_commit(commit, id, repo, show_patch, diff_context);
640 		got_object_commit_close(commit);
641 		if (err || (limit && --limit == 0))
642 			break;
643 	}
644 done:
645 	got_commit_graph_close(graph);
646 	return err;
647 }
648 
649 __dead static void
650 usage_log(void)
651 {
652 	fprintf(stderr, "usage: %s log [-c commit] [-C number] [-f] [ -l N ] [-p] "
653 	    "[-r repository-path] [path]\n", getprogname());
654 	exit(1);
655 }
656 
657 static const struct got_error *
658 cmd_log(int argc, char *argv[])
659 {
660 	const struct got_error *error;
661 	struct got_repository *repo = NULL;
662 	struct got_commit_object *commit = NULL;
663 	struct got_object_id *id = NULL;
664 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
665 	char *start_commit = NULL;
666 	int diff_context = 3, ch;
667 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
668 	const char *errstr;
669 
670 #ifndef PROFILE
671 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
672 	    == -1)
673 		err(1, "pledge");
674 #endif
675 
676 	while ((ch = getopt(argc, argv, "pc:C:l:fr:")) != -1) {
677 		switch (ch) {
678 		case 'p':
679 			show_patch = 1;
680 			break;
681 		case 'c':
682 			start_commit = optarg;
683 			break;
684 		case 'C':
685 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
686 			    &errstr);
687 			if (errstr != NULL)
688 				err(1, "-C option %s", errstr);
689 			break;
690 		case 'l':
691 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
692 			if (errstr != NULL)
693 				err(1, "-l option %s", errstr);
694 			break;
695 		case 'f':
696 			first_parent_traversal = 1;
697 			break;
698 		case 'r':
699 			repo_path = realpath(optarg, NULL);
700 			if (repo_path == NULL)
701 				err(1, "-r option");
702 			break;
703 		default:
704 			usage();
705 			/* NOTREACHED */
706 		}
707 	}
708 
709 	argc -= optind;
710 	argv += optind;
711 
712 	if (argc == 0)
713 		path = strdup("");
714 	else if (argc == 1)
715 		path = strdup(argv[0]);
716 	else
717 		usage_log();
718 	if (path == NULL)
719 		return got_error_from_errno();
720 
721 	cwd = getcwd(NULL, 0);
722 	if (cwd == NULL) {
723 		error = got_error_from_errno();
724 		goto done;
725 	}
726 	if (repo_path == NULL) {
727 		repo_path = strdup(cwd);
728 		if (repo_path == NULL) {
729 			error = got_error_from_errno();
730 			goto done;
731 		}
732 	}
733 
734 	error = got_repo_open(&repo, repo_path);
735 	if (error != NULL)
736 		goto done;
737 
738 	if (start_commit == NULL) {
739 		struct got_reference *head_ref;
740 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
741 		if (error != NULL)
742 			return error;
743 		error = got_ref_resolve(&id, repo, head_ref);
744 		got_ref_close(head_ref);
745 		if (error != NULL)
746 			return error;
747 		error = got_object_open_as_commit(&commit, repo, id);
748 	} else {
749 		struct got_reference *ref;
750 		error = got_ref_open(&ref, repo, start_commit);
751 		if (error == NULL) {
752 			error = got_ref_resolve(&id, repo, ref);
753 			got_ref_close(ref);
754 			if (error != NULL)
755 				return error;
756 			error = got_object_open_as_commit(&commit, repo, id);
757 			if (error != NULL)
758 				return error;
759 		}
760 		if (commit == NULL) {
761 			error = got_object_resolve_id_str(&id, repo,
762 			    start_commit);
763 			if (error != NULL)
764 				return error;
765 		}
766 	}
767 	if (error != NULL)
768 		goto done;
769 
770 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
771 	if (error != NULL)
772 		goto done;
773 	if (in_repo_path) {
774 		free(path);
775 		path = in_repo_path;
776 	}
777 
778 	error = print_commits(id, repo, path, show_patch,
779 	    diff_context, limit, first_parent_traversal);
780 done:
781 	free(path);
782 	free(repo_path);
783 	free(cwd);
784 	free(id);
785 	if (repo) {
786 		const struct got_error *repo_error;
787 		repo_error = got_repo_close(repo);
788 		if (error == NULL)
789 			error = repo_error;
790 	}
791 	return error;
792 }
793 
794 __dead static void
795 usage_diff(void)
796 {
797 	fprintf(stderr, "usage: %s diff [-C number] [repository-path] "
798 	    "object1 object2\n", getprogname());
799 	exit(1);
800 }
801 
802 static const struct got_error *
803 cmd_diff(int argc, char *argv[])
804 {
805 	const struct got_error *error;
806 	struct got_repository *repo = NULL;
807 	char *repo_path = NULL;
808 	struct got_object_id *id1 = NULL, *id2 = NULL;
809 	char *id_str1 = NULL, *id_str2 = NULL;
810 	int type1, type2;
811 	int diff_context = 3, ch;
812 	const char *errstr;
813 
814 #ifndef PROFILE
815 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
816 	    == -1)
817 		err(1, "pledge");
818 #endif
819 
820 	while ((ch = getopt(argc, argv, "C:")) != -1) {
821 		switch (ch) {
822 		case 'C':
823 			diff_context = strtonum(optarg, 1, INT_MAX, &errstr);
824 			if (errstr != NULL)
825 				err(1, "-C option %s", errstr);
826 			break;
827 		default:
828 			usage();
829 			/* NOTREACHED */
830 		}
831 	}
832 
833 	argc -= optind;
834 	argv += optind;
835 
836 	if (argc == 0) {
837 		usage_diff(); /* TODO show local worktree changes */
838 	} else if (argc == 2) {
839 		repo_path = getcwd(NULL, 0);
840 		if (repo_path == NULL)
841 			return got_error_from_errno();
842 		id_str1 = argv[0];
843 		id_str2 = argv[1];
844 	} else if (argc == 3) {
845 		repo_path = realpath(argv[0], NULL);
846 		if (repo_path == NULL)
847 			return got_error_from_errno();
848 		id_str1 = argv[1];
849 		id_str2 = argv[2];
850 	} else
851 		usage_diff();
852 
853 	error = got_repo_open(&repo, repo_path);
854 	free(repo_path);
855 	if (error != NULL)
856 		goto done;
857 
858 	error = got_object_resolve_id_str(&id1, repo, id_str1);
859 	if (error)
860 		goto done;
861 
862 	error = got_object_resolve_id_str(&id2, repo, id_str2);
863 	if (error)
864 		goto done;
865 
866 	error = got_object_get_type(&type1, repo, id1);
867 	if (error)
868 		goto done;
869 
870 	error = got_object_get_type(&type2, repo, id2);
871 	if (error)
872 		goto done;
873 
874 	if (type1 != type2) {
875 		error = got_error(GOT_ERR_OBJ_TYPE);
876 		goto done;
877 	}
878 
879 	switch (type1) {
880 	case GOT_OBJ_TYPE_BLOB:
881 		error = got_diff_objects_as_blobs(id1, id2, NULL, NULL,
882 		    diff_context, repo, stdout);
883 		break;
884 	case GOT_OBJ_TYPE_TREE:
885 		error = got_diff_objects_as_trees(id1, id2, "", "",
886 		    diff_context, repo, stdout);
887 		break;
888 	case GOT_OBJ_TYPE_COMMIT:
889 		printf("diff %s %s\n", id_str1 ? id_str1 : "/dev/null",
890 		    id_str2);
891 		error = got_diff_objects_as_commits(id1, id2, diff_context,
892 		    repo, stdout);
893 		break;
894 	default:
895 		error = got_error(GOT_ERR_OBJ_TYPE);
896 	}
897 
898 done:
899 	free(id1);
900 	free(id2);
901 	if (repo) {
902 		const struct got_error *repo_error;
903 		repo_error = got_repo_close(repo);
904 		if (error == NULL)
905 			error = repo_error;
906 	}
907 	return error;
908 }
909 
910 __dead static void
911 usage_blame(void)
912 {
913 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
914 	    getprogname());
915 	exit(1);
916 }
917 
918 static const struct got_error *
919 cmd_blame(int argc, char *argv[])
920 {
921 	const struct got_error *error;
922 	struct got_repository *repo = NULL;
923 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
924 	struct got_object_id *commit_id = NULL;
925 	char *commit_id_str = NULL;
926 	int ch;
927 
928 #ifndef PROFILE
929 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
930 	    == -1)
931 		err(1, "pledge");
932 #endif
933 
934 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
935 		switch (ch) {
936 		case 'c':
937 			commit_id_str = optarg;
938 			break;
939 		case 'r':
940 			repo_path = realpath(optarg, NULL);
941 			if (repo_path == NULL)
942 				err(1, "-r option");
943 			break;
944 		default:
945 			usage();
946 			/* NOTREACHED */
947 		}
948 	}
949 
950 	argc -= optind;
951 	argv += optind;
952 
953 	if (argc == 1)
954 		path = argv[0];
955 	else
956 		usage_blame();
957 
958 	cwd = getcwd(NULL, 0);
959 	if (cwd == NULL) {
960 		error = got_error_from_errno();
961 		goto done;
962 	}
963 	if (repo_path == NULL) {
964 		repo_path = strdup(cwd);
965 		if (repo_path == NULL) {
966 			error = got_error_from_errno();
967 			goto done;
968 		}
969 	}
970 
971 	error = got_repo_open(&repo, repo_path);
972 	if (error != NULL)
973 		goto done;
974 
975 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
976 	if (error != NULL)
977 		goto done;
978 
979 	if (commit_id_str == NULL) {
980 		struct got_reference *head_ref;
981 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
982 		if (error != NULL)
983 			goto done;
984 		error = got_ref_resolve(&commit_id, repo, head_ref);
985 		got_ref_close(head_ref);
986 		if (error != NULL)
987 			goto done;
988 	} else {
989 		error = got_object_resolve_id_str(&commit_id, repo,
990 		    commit_id_str);
991 		if (error != NULL)
992 			goto done;
993 	}
994 
995 	error = got_blame(in_repo_path, commit_id, repo, stdout);
996 done:
997 	free(in_repo_path);
998 	free(repo_path);
999 	free(cwd);
1000 	free(commit_id);
1001 	if (repo) {
1002 		const struct got_error *repo_error;
1003 		repo_error = got_repo_close(repo);
1004 		if (error == NULL)
1005 			error = repo_error;
1006 	}
1007 	return error;
1008 }
1009 
1010 __dead static void
1011 usage_tree(void)
1012 {
1013 	fprintf(stderr, "usage: %s tree [-c commit] [-r repository-path] [-i] path\n",
1014 	    getprogname());
1015 	exit(1);
1016 }
1017 
1018 
1019 static const struct got_error *
1020 print_tree(const char *path, struct got_object_id *commit_id,
1021     int show_ids, struct got_repository *repo)
1022 {
1023 	const struct got_error *err = NULL;
1024 	struct got_object_id *tree_id = NULL;
1025 	struct got_tree_object *tree = NULL;
1026 	const struct got_tree_entries *entries;
1027 	struct got_tree_entry *te;
1028 
1029 	err = got_object_id_by_path(&tree_id, repo, commit_id, path);
1030 	if (err)
1031 		goto done;
1032 
1033 	err = got_object_open_as_tree(&tree, repo, tree_id);
1034 	if (err)
1035 		goto done;
1036 	entries = got_object_tree_get_entries(tree);
1037 	te = SIMPLEQ_FIRST(&entries->head);
1038 	while (te) {
1039 		char *id = NULL;
1040 
1041 		if (sigint_received || sigpipe_received)
1042 			break;
1043 
1044 		if (show_ids) {
1045 			char *id_str;
1046 			err = got_object_id_str(&id_str, te->id);
1047 			if (err)
1048 				goto done;
1049 			if (asprintf(&id, "%s ", id_str) == -1) {
1050 				err = got_error_from_errno();
1051 				free(id_str);
1052 				goto done;
1053 			}
1054 			free(id_str);
1055 		}
1056 		printf("%s%s%s\n", id ? id : "",
1057 		    te->name, S_ISDIR(te->mode) ? "/" : "");
1058 		te = SIMPLEQ_NEXT(te, entry);
1059 		free(id);
1060 	}
1061 done:
1062 	if (tree)
1063 		got_object_tree_close(tree);
1064 	free(tree_id);
1065 	return err;
1066 }
1067 
1068 static const struct got_error *
1069 cmd_tree(int argc, char *argv[])
1070 {
1071 	const struct got_error *error;
1072 	struct got_repository *repo = NULL;
1073 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
1074 	struct got_object_id *commit_id = NULL;
1075 	char *commit_id_str = NULL;
1076 	int show_ids = 0;
1077 	int ch;
1078 
1079 #ifndef PROFILE
1080 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
1081 	    == -1)
1082 		err(1, "pledge");
1083 #endif
1084 
1085 	while ((ch = getopt(argc, argv, "c:r:i")) != -1) {
1086 		switch (ch) {
1087 		case 'c':
1088 			commit_id_str = optarg;
1089 			break;
1090 		case 'r':
1091 			repo_path = realpath(optarg, NULL);
1092 			if (repo_path == NULL)
1093 				err(1, "-r option");
1094 			break;
1095 		case 'i':
1096 			show_ids = 1;
1097 			break;
1098 		default:
1099 			usage();
1100 			/* NOTREACHED */
1101 		}
1102 	}
1103 
1104 	argc -= optind;
1105 	argv += optind;
1106 
1107 	if (argc == 1)
1108 		path = argv[0];
1109 	else if (argc > 1)
1110 		usage_tree();
1111 	else
1112 		path = "/";
1113 
1114 	cwd = getcwd(NULL, 0);
1115 	if (cwd == NULL) {
1116 		error = got_error_from_errno();
1117 		goto done;
1118 	}
1119 	if (repo_path == NULL) {
1120 		repo_path = strdup(cwd);
1121 		if (repo_path == NULL) {
1122 			error = got_error_from_errno();
1123 			goto done;
1124 		}
1125 	}
1126 
1127 	error = got_repo_open(&repo, repo_path);
1128 	if (error != NULL)
1129 		goto done;
1130 
1131 	error = got_repo_map_path(&in_repo_path, repo, path, 1);
1132 	if (error != NULL)
1133 		goto done;
1134 
1135 	if (commit_id_str == NULL) {
1136 		struct got_reference *head_ref;
1137 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
1138 		if (error != NULL)
1139 			goto done;
1140 		error = got_ref_resolve(&commit_id, repo, head_ref);
1141 		got_ref_close(head_ref);
1142 		if (error != NULL)
1143 			goto done;
1144 	} else {
1145 		error = got_object_resolve_id_str(&commit_id, repo,
1146 		    commit_id_str);
1147 		if (error != NULL)
1148 			goto done;
1149 	}
1150 
1151 	error = print_tree(in_repo_path, commit_id, show_ids, repo);
1152 done:
1153 	free(in_repo_path);
1154 	free(repo_path);
1155 	free(cwd);
1156 	free(commit_id);
1157 	if (repo) {
1158 		const struct got_error *repo_error;
1159 		repo_error = got_repo_close(repo);
1160 		if (error == NULL)
1161 			error = repo_error;
1162 	}
1163 	return error;
1164 }
1165 
1166 #ifdef notyet
1167 static const struct got_error *
1168 cmd_status(int argc __unused, char *argv[] __unused)
1169 {
1170 	git_repository *repo = NULL;
1171 	git_status_list *status;
1172 	git_status_options statusopts;
1173 	size_t i;
1174 
1175 	git_libgit2_init();
1176 
1177 	if (git_repository_open_ext(&repo, ".", 0, NULL))
1178 		errx(1, "git_repository_open: %s", giterr_last()->message);
1179 
1180 	if (git_repository_is_bare(repo))
1181 		errx(1, "bar repository");
1182 
1183 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
1184 		errx(1, "git_status_init_options: %s", giterr_last()->message);
1185 
1186 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
1187 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
1188 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
1189 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
1190 
1191 	if (git_status_list_new(&status, repo, &statusopts))
1192 		errx(1, "git_status_list_new: %s", giterr_last()->message);
1193 
1194 	for (i = 0; i < git_status_list_entrycount(status); i++) {
1195 		const git_status_entry *se;
1196 
1197 		se = git_status_byindex(status, i);
1198 		switch (se->status) {
1199 		case GIT_STATUS_WT_NEW:
1200 			printf("? %s\n", se->index_to_workdir->new_file.path);
1201 			break;
1202 		case GIT_STATUS_WT_MODIFIED:
1203 			printf("M %s\n", se->index_to_workdir->new_file.path);
1204 			break;
1205 		case GIT_STATUS_WT_DELETED:
1206 			printf("R %s\n", se->index_to_workdir->new_file.path);
1207 			break;
1208 		case GIT_STATUS_WT_RENAMED:
1209 			printf("m %s -> %s\n",
1210 			    se->index_to_workdir->old_file.path,
1211 			    se->index_to_workdir->new_file.path);
1212 			break;
1213 		case GIT_STATUS_WT_TYPECHANGE:
1214 			printf("t %s\n", se->index_to_workdir->new_file.path);
1215 			break;
1216 		case GIT_STATUS_INDEX_NEW:
1217 			printf("A %s\n", se->head_to_index->new_file.path);
1218 			break;
1219 		case GIT_STATUS_INDEX_MODIFIED:
1220 			printf("M %s\n", se->head_to_index->old_file.path);
1221 			break;
1222 		case GIT_STATUS_INDEX_DELETED:
1223 			printf("R %s\n", se->head_to_index->old_file.path);
1224 			break;
1225 		case GIT_STATUS_INDEX_RENAMED:
1226 			printf("m %s -> %s\n",
1227 			    se->head_to_index->old_file.path,
1228 			    se->head_to_index->new_file.path);
1229 			break;
1230 		case GIT_STATUS_INDEX_TYPECHANGE:
1231 			printf("t %s\n", se->head_to_index->old_file.path);
1232 			break;
1233 		case GIT_STATUS_CURRENT:
1234 		default:
1235 			break;
1236 		}
1237 	}
1238 
1239 	git_status_list_free(status);
1240 	git_repository_free(repo);
1241 	git_libgit2_shutdown();
1242 
1243 	return 0;
1244 }
1245 #endif