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 
22 #include <err.h>
23 #include <errno.h>
24 #include <locale.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29 #include <libgen.h>
30 #include <time.h>
31 
32 #include "got_error.h"
33 #include "got_object.h"
34 #include "got_reference.h"
35 #include "got_repository.h"
36 #include "got_worktree.h"
37 #include "got_diff.h"
38 #include "got_commit_graph.h"
39 #include "got_blame.h"
40 
41 #ifndef nitems
42 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
43 #endif
44 
45 struct cmd {
46 	const char	 *cmd_name;
47 	const struct got_error *(*cmd_main)(int, char *[]);
48 	void		(*cmd_usage)(void);
49 	const char	 *cmd_descr;
50 };
51 
52 __dead static void	usage(void);
53 __dead static void	usage_checkout(void);
54 __dead static void	usage_log(void);
55 __dead static void	usage_diff(void);
56 __dead static void	usage_blame(void);
57 
58 static const struct got_error*		cmd_checkout(int, char *[]);
59 static const struct got_error*		cmd_log(int, char *[]);
60 static const struct got_error*		cmd_diff(int, char *[]);
61 static const struct got_error*		cmd_blame(int, char *[]);
62 #ifdef notyet
63 static const struct got_error*		cmd_status(int, char *[]);
64 #endif
65 
66 static struct cmd got_commands[] = {
67 	{ "checkout",	cmd_checkout,	usage_checkout,
68 	    "check out a new work tree from a repository" },
69 	{ "log",	cmd_log,	usage_log,
70 	    "show repository history" },
71 	{ "diff",	cmd_diff,	usage_diff,
72 	    "compare files and directories" },
73 	{ "blame",	cmd_blame,	usage_blame,
74 	    " show when lines in a file were changed" },
75 #ifdef notyet
76 	{ "status",	cmd_status,	usage_status,
77 	    "show modification status of files" },
78 #endif
79 };
80 
81 int
82 main(int argc, char *argv[])
83 {
84 	struct cmd *cmd;
85 	unsigned int i;
86 	int ch;
87 	int hflag = 0;
88 
89 	setlocale(LC_ALL, "");
90 
91 	while ((ch = getopt(argc, argv, "h")) != -1) {
92 		switch (ch) {
93 		case 'h':
94 			hflag = 1;
95 			break;
96 		default:
97 			usage();
98 			/* NOTREACHED */
99 		}
100 	}
101 
102 	argc -= optind;
103 	argv += optind;
104 	optind = 0;
105 
106 	if (argc <= 0)
107 		usage();
108 
109 	for (i = 0; i < nitems(got_commands); i++) {
110 		const struct got_error *error;
111 
112 		cmd = &got_commands[i];
113 
114 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
115 			continue;
116 
117 		if (hflag)
118 			got_commands[i].cmd_usage();
119 
120 		error = got_commands[i].cmd_main(argc, argv);
121 		if (error) {
122 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
123 			return 1;
124 		}
125 
126 		return 0;
127 	}
128 
129 	fprintf(stderr, "%s: unknown command '%s'\n", getprogname(), argv[0]);
130 	return 1;
131 }
132 
133 __dead static void
134 usage(void)
135 {
136 	int i;
137 
138 	fprintf(stderr, "usage: %s [-h] command [arg ...]\n\n"
139 	    "Available commands:\n", getprogname());
140 	for (i = 0; i < nitems(got_commands); i++) {
141 		struct cmd *cmd = &got_commands[i];
142 		fprintf(stderr, "    %s: %s\n", cmd->cmd_name, cmd->cmd_descr);
143 	}
144 	exit(1);
145 }
146 
147 __dead static void
148 usage_checkout(void)
149 {
150 	fprintf(stderr, "usage: %s checkout [-p prefix] repository-path "
151 	    "[worktree-path]\n", getprogname());
152 	exit(1);
153 }
154 
155 static void
156 checkout_progress(void *arg, const char *path)
157 {
158 	char *worktree_path = arg;
159 
160 	while (path[0] == '/')
161 		path++;
162 
163 	printf("A  %s/%s\n", worktree_path, path);
164 }
165 
166 static const struct got_error *
167 cmd_checkout(int argc, char *argv[])
168 {
169 	const struct got_error *error = NULL;
170 	struct got_repository *repo = NULL;
171 	struct got_reference *head_ref = NULL;
172 	struct got_worktree *worktree = NULL;
173 	char *repo_path = NULL;
174 	char *worktree_path = NULL;
175 	const char *path_prefix = "";
176 	int ch;
177 
178 	while ((ch = getopt(argc, argv, "p:")) != -1) {
179 		switch (ch) {
180 		case 'p':
181 			path_prefix = optarg;
182 			break;
183 		default:
184 			usage();
185 			/* NOTREACHED */
186 		}
187 	}
188 
189 	argc -= optind;
190 	argv += optind;
191 
192 #ifndef PROFILE
193 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
194 	    == -1)
195 		err(1, "pledge");
196 #endif
197 	if (argc == 1) {
198 		char *cwd, *base, *dotgit;
199 		repo_path = realpath(argv[0], NULL);
200 		if (repo_path == NULL)
201 			return got_error_from_errno();
202 		cwd = getcwd(NULL, 0);
203 		if (cwd == NULL) {
204 			error = got_error_from_errno();
205 			goto done;
206 		}
207 		if (path_prefix[0])
208 			base = basename(path_prefix);
209 		else
210 			base = basename(repo_path);
211 		if (base == NULL) {
212 			error = got_error_from_errno();
213 			goto done;
214 		}
215 		dotgit = strstr(base, ".git");
216 		if (dotgit)
217 			*dotgit = '\0';
218 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
219 			error = got_error_from_errno();
220 			free(cwd);
221 			goto done;
222 		}
223 		free(cwd);
224 	} else if (argc == 2) {
225 		repo_path = realpath(argv[0], NULL);
226 		if (repo_path == NULL) {
227 			error = got_error_from_errno();
228 			goto done;
229 		}
230 		worktree_path = realpath(argv[1], NULL);
231 		if (worktree_path == NULL) {
232 			error = got_error_from_errno();
233 			goto done;
234 		}
235 	} else
236 		usage_checkout();
237 
238 	error = got_repo_open(&repo, repo_path);
239 	if (error != NULL)
240 		goto done;
241 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
242 	if (error != NULL)
243 		goto done;
244 
245 	error = got_worktree_init(worktree_path, head_ref, path_prefix, repo);
246 	if (error != NULL)
247 		goto done;
248 
249 	error = got_worktree_open(&worktree, worktree_path);
250 	if (error != NULL)
251 		goto done;
252 
253 	error = got_worktree_checkout_files(worktree, head_ref, repo,
254 	    checkout_progress, worktree_path);
255 	if (error != NULL)
256 		goto done;
257 
258 	printf("Checked out %s\n", worktree_path);
259 	printf("Now shut up and hack\n");
260 
261 done:
262 	free(repo_path);
263 	free(worktree_path);
264 	return error;
265 }
266 
267 static const struct got_error *
268 print_patch(struct got_commit_object *commit, struct got_object_id *id,
269     struct got_repository *repo)
270 {
271 	const struct got_error *err = NULL;
272 	struct got_tree_object *tree1 = NULL, *tree2;
273 	struct got_object_qid *qid;
274 
275 	err = got_object_open_as_tree(&tree2, repo, commit->tree_id);
276 	if (err)
277 		return err;
278 
279 	qid = SIMPLEQ_FIRST(&commit->parent_ids);
280 	if (qid != NULL) {
281 		struct got_commit_object *pcommit;
282 
283 		err = got_object_open_as_commit(&pcommit, repo, qid->id);
284 		if (err)
285 			return err;
286 
287 		err = got_object_open_as_tree(&tree1, repo, pcommit->tree_id);
288 		got_object_commit_close(pcommit);
289 		if (err)
290 			return err;
291 	}
292 
293 	err = got_diff_tree(tree1, tree2, "", "", repo, stdout);
294 	if (tree1)
295 		got_object_tree_close(tree1);
296 	got_object_tree_close(tree2);
297 	return err;
298 }
299 
300 static char *
301 get_datestr(time_t *time, char *datebuf)
302 {
303 	char *p, *s = ctime_r(time, datebuf);
304 	p = strchr(s, '\n');
305 	if (p)
306 		*p = '\0';
307 	return s;
308 }
309 
310 static const struct got_error *
311 print_commit(struct got_commit_object *commit, struct got_object_id *id,
312     struct got_repository *repo, int show_patch)
313 {
314 	const struct got_error *err = NULL;
315 	char *id_str, *datestr, *logmsg0, *logmsg, *line;
316 	char datebuf[26];
317 	time_t author_time, committer_time;
318 
319 	err = got_object_id_str(&id_str, id);
320 	if (err)
321 		return err;
322 
323 	author_time = mktime(&commit->tm_author);
324 	committer_time = mktime(&commit->tm_committer);
325 #if 0
326 	/* This would express the date in committer's timezone. */
327 	author_time += commit->tm_author.tm_gmtoff;
328 	committer_time += commit->tm_committer.tm_gmtoff;
329 #endif
330 
331 	printf("-----------------------------------------------\n");
332 	printf("commit %s\n", id_str);
333 	free(id_str);
334 	printf("from: %s\n", commit->author);
335 	datestr = get_datestr(&committer_time, datebuf);
336 	printf("date: %s UTC\n", datestr);
337 	if (strcmp(commit->author, commit->committer) != 0)
338 		printf("via: %s\n", commit->committer);
339 	if (commit->nparents > 1) {
340 		struct got_object_qid *qid;
341 		int n = 1;
342 		SIMPLEQ_FOREACH(qid, &commit->parent_ids, entry) {
343 			err = got_object_id_str(&id_str, qid->id);
344 			if (err)
345 				return err;
346 			printf("parent %d: %s\n", n++, id_str);
347 			free(id_str);
348 		}
349 	}
350 
351 	logmsg0 = strdup(commit->logmsg);
352 	if (logmsg0 == NULL)
353 		return got_error_from_errno();
354 
355 	logmsg = logmsg0;
356 	do {
357 		line = strsep(&logmsg, "\n");
358 		if (line)
359 			printf(" %s\n", line);
360 	} while (line);
361 	free(logmsg0);
362 
363 	if (show_patch) {
364 		err = print_patch(commit, id, repo);
365 		if (err == 0)
366 			printf("\n");
367 	}
368 
369 	return err;
370 }
371 
372 static const struct got_error *
373 detect_change(int *changed, struct got_object_id *commit_id,
374     struct got_object *obj, const char *path, struct got_repository *repo)
375 {
376 	const struct got_error *err = NULL;
377 	struct got_object_id *id, *pid;
378 	struct got_object *pobj;
379 
380 	err = got_object_open_by_path(&pobj, repo, commit_id, path);
381 	if (err) {
382 		if (err->code != GOT_ERR_NO_OBJ)
383 			return err;
384 		*changed = 1;
385 		return NULL;
386 	}
387 
388 	id = got_object_get_id(obj);
389 	pid = got_object_get_id(pobj);
390 	*changed = (got_object_id_cmp(id, pid) != 0);
391 	got_object_close(pobj);
392 	return NULL;
393 }
394 
395 static const struct got_error *
396 print_commits(struct got_object *root_obj, struct got_object_id *root_id,
397     struct got_repository *repo, char *path, int show_patch, int limit,
398     int first_parent_traversal)
399 {
400 	const struct got_error *err;
401 	struct got_commit_graph *graph;
402 	int ncommits, found_obj = 0;
403 	int is_root_path = (strcmp(path, "/") == 0);
404 
405 	err = got_commit_graph_open(&graph, root_id, first_parent_traversal,
406 	    repo);
407 	if (err)
408 		return err;
409 	err = got_commit_graph_iter_start(graph, root_id);
410 	if (err)
411 		goto done;
412 	do {
413 		struct got_commit_object *commit;
414 		struct got_object_id *id;
415 
416 		err = got_commit_graph_iter_next(&id, graph);
417 		if (err) {
418 			if (err->code == GOT_ERR_ITER_COMPLETED) {
419 				err = NULL;
420 				break;
421 			}
422 			if (err->code != GOT_ERR_ITER_NEED_MORE)
423 				break;
424 			err = got_commit_graph_fetch_commits(&ncommits,
425 			    graph, 1, repo);
426 			if (err)
427 				break;
428 			else
429 				continue;
430 		}
431 		if (id == NULL)
432 			break;
433 
434 		err = got_object_open_as_commit(&commit, repo, id);
435 		if (err)
436 			break;
437 		if (!is_root_path) {
438 			struct got_object *obj;
439 			struct got_object_qid *pid;
440 			int changed = 0;
441 
442 			err = got_object_open_by_path(&obj, repo, id, path);
443 			if (err) {
444 				got_object_commit_close(commit);
445 				if (err->code == GOT_ERR_NO_OBJ && found_obj) {
446 					/*
447 					 * History of the path stops here
448 					 * on the current commit's branch.
449 					 * Keep logging on other branches.
450 					 */
451 					err = NULL;
452 					continue;
453 				}
454 				break;
455 			}
456 			found_obj = 1;
457 
458 			pid = SIMPLEQ_FIRST(&commit->parent_ids);
459 			if (pid) {
460 				err = detect_change(&changed, pid->id, obj,
461 				    path, repo);
462 				if (err) {
463 					got_object_close(obj);
464 					got_object_commit_close(commit);
465 					break;
466 				}
467 			}
468 			got_object_close(obj);
469 			if (!changed) {
470 				got_object_commit_close(commit);
471 				continue;
472 			}
473 		}
474 		err = print_commit(commit, id, repo, show_patch);
475 		got_object_commit_close(commit);
476 		if (err || (limit && --limit == 0))
477 			break;
478 	} while (ncommits > 0);
479 done:
480 	got_commit_graph_close(graph);
481 	return err;
482 }
483 
484 __dead static void
485 usage_log(void)
486 {
487 	fprintf(stderr, "usage: %s log [-c commit] [-f] [ -l N ] [-p] "
488 	    "[-r repository-path] [path]\n", getprogname());
489 	exit(1);
490 }
491 
492 static const struct got_error *
493 cmd_log(int argc, char *argv[])
494 {
495 	const struct got_error *error;
496 	struct got_repository *repo = NULL;
497 	struct got_object_id *id = NULL;
498 	struct got_object *obj = NULL;
499 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
500 	char *start_commit = NULL;
501 	int ch;
502 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
503 	const char *errstr;
504 
505 #ifndef PROFILE
506 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
507 	    == -1)
508 		err(1, "pledge");
509 #endif
510 
511 	while ((ch = getopt(argc, argv, "pc:l:fr:")) != -1) {
512 		switch (ch) {
513 		case 'p':
514 			show_patch = 1;
515 			break;
516 		case 'c':
517 			start_commit = optarg;
518 			break;
519 		case 'l':
520 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
521 			if (errstr != NULL)
522 				err(1, "-l option %s", errstr);
523 			break;
524 		case 'f':
525 			first_parent_traversal = 1;
526 			break;
527 		case 'r':
528 			repo_path = realpath(optarg, NULL);
529 			if (repo_path == NULL)
530 				err(1, "-r option");
531 			break;
532 		default:
533 			usage();
534 			/* NOTREACHED */
535 		}
536 	}
537 
538 	argc -= optind;
539 	argv += optind;
540 
541 	if (argc == 0)
542 		path = strdup("");
543 	else if (argc == 1)
544 		path = strdup(argv[0]);
545 	else
546 		usage_log();
547 	if (path == NULL)
548 		return got_error_from_errno();
549 
550 	cwd = getcwd(NULL, 0);
551 	if (cwd == NULL) {
552 		error = got_error_from_errno();
553 		goto done;
554 	}
555 	if (repo_path == NULL) {
556 		repo_path = strdup(cwd);
557 		if (repo_path == NULL) {
558 			error = got_error_from_errno();
559 			goto done;
560 		}
561 	}
562 
563 	error = got_repo_open(&repo, repo_path);
564 	if (error != NULL)
565 		goto done;
566 
567 	if (start_commit == NULL) {
568 		struct got_reference *head_ref;
569 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
570 		if (error != NULL)
571 			return error;
572 		error = got_ref_resolve(&id, repo, head_ref);
573 		got_ref_close(head_ref);
574 		if (error != NULL)
575 			return error;
576 		error = got_object_open(&obj, repo, id);
577 	} else {
578 		struct got_reference *ref;
579 		error = got_ref_open(&ref, repo, start_commit);
580 		if (error == NULL) {
581 			error = got_ref_resolve(&id, repo, ref);
582 			got_ref_close(ref);
583 			if (error != NULL)
584 				return error;
585 			error = got_object_open(&obj, repo, id);
586 			if (error != NULL)
587 				return error;
588 		}
589 		if (obj == NULL) {
590 			error = got_object_open_by_id_str(&obj, repo,
591 			    start_commit);
592 			if (error != NULL)
593 				return error;
594 			id = got_object_id_dup(got_object_get_id(obj));
595 			if (id == NULL)
596 				error = got_error_from_errno();
597 		}
598 	}
599 	if (error != NULL)
600 		goto done;
601 	if (got_object_get_type(obj) != GOT_OBJ_TYPE_COMMIT) {
602 		error = got_error(GOT_ERR_OBJ_TYPE);
603 		goto done;
604 	}
605 
606 	error = got_repo_map_path(&in_repo_path, repo, path);
607 	if (error != NULL)
608 		goto done;
609 	if (in_repo_path) {
610 		free(path);
611 		path = in_repo_path;
612 	}
613 
614 	error = print_commits(obj, id, repo, path, show_patch,
615 	    limit, first_parent_traversal);
616 done:
617 	free(path);
618 	free(repo_path);
619 	free(cwd);
620 	if (obj)
621 		got_object_close(obj);
622 	free(id);
623 	if (repo) {
624 		const struct got_error *repo_error;
625 		repo_error = got_repo_close(repo);
626 		if (error == NULL)
627 			error = repo_error;
628 	}
629 	return error;
630 }
631 
632 __dead static void
633 usage_diff(void)
634 {
635 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
636 	    getprogname());
637 	exit(1);
638 }
639 
640 static const struct got_error *
641 cmd_diff(int argc, char *argv[])
642 {
643 	const struct got_error *error;
644 	struct got_repository *repo = NULL;
645 	struct got_object *obj1 = NULL, *obj2 = NULL;
646 	char *repo_path = NULL;
647 	char *obj_id_str1 = NULL, *obj_id_str2 = NULL;
648 	int ch;
649 
650 #ifndef PROFILE
651 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
652 	    == -1)
653 		err(1, "pledge");
654 #endif
655 
656 	while ((ch = getopt(argc, argv, "")) != -1) {
657 		switch (ch) {
658 		default:
659 			usage();
660 			/* NOTREACHED */
661 		}
662 	}
663 
664 	argc -= optind;
665 	argv += optind;
666 
667 	if (argc == 0) {
668 		usage_diff(); /* TODO show local worktree changes */
669 	} else if (argc == 2) {
670 		repo_path = getcwd(NULL, 0);
671 		if (repo_path == NULL)
672 			return got_error_from_errno();
673 		obj_id_str1 = argv[0];
674 		obj_id_str2 = argv[1];
675 	} else if (argc == 3) {
676 		repo_path = realpath(argv[0], NULL);
677 		if (repo_path == NULL)
678 			return got_error_from_errno();
679 		obj_id_str1 = argv[1];
680 		obj_id_str2 = argv[2];
681 	} else
682 		usage_diff();
683 
684 	error = got_repo_open(&repo, repo_path);
685 	free(repo_path);
686 	if (error != NULL)
687 		goto done;
688 
689 	error = got_object_open_by_id_str(&obj1, repo, obj_id_str1);
690 	if (error)
691 		goto done;
692 
693 	error = got_object_open_by_id_str(&obj2, repo, obj_id_str2);
694 	if (error)
695 		goto done;
696 
697 	if (got_object_get_type(obj1) != got_object_get_type(obj2)) {
698 		error = got_error(GOT_ERR_OBJ_TYPE);
699 		goto done;
700 	}
701 
702 	switch (got_object_get_type(obj1)) {
703 	case GOT_OBJ_TYPE_BLOB:
704 		error = got_diff_objects_as_blobs(obj1, obj2, NULL, NULL,
705 		    repo, stdout);
706 		break;
707 	case GOT_OBJ_TYPE_TREE:
708 		error = got_diff_objects_as_trees(obj1, obj2, "", "", repo,
709 		    stdout);
710 		break;
711 	case GOT_OBJ_TYPE_COMMIT:
712 		error = got_diff_objects_as_commits(obj1, obj2, repo, stdout);
713 		break;
714 	default:
715 		error = got_error(GOT_ERR_OBJ_TYPE);
716 	}
717 
718 done:
719 	if (obj1)
720 		got_object_close(obj1);
721 	if (obj2)
722 		got_object_close(obj2);
723 	if (repo) {
724 		const struct got_error *repo_error;
725 		repo_error = got_repo_close(repo);
726 		if (error == NULL)
727 			error = repo_error;
728 	}
729 	return error;
730 }
731 
732 __dead static void
733 usage_blame(void)
734 {
735 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
736 	    getprogname());
737 	exit(1);
738 }
739 
740 static const struct got_error *
741 cmd_blame(int argc, char *argv[])
742 {
743 	const struct got_error *error;
744 	struct got_repository *repo = NULL;
745 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
746 	struct got_object_id *commit_id = NULL;
747 	char *commit_id_str = NULL;
748 	int ch;
749 
750 #ifndef PROFILE
751 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
752 	    == -1)
753 		err(1, "pledge");
754 #endif
755 
756 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
757 		switch (ch) {
758 		case 'c':
759 			commit_id_str = optarg;
760 			break;
761 		case 'r':
762 			repo_path = realpath(optarg, NULL);
763 			if (repo_path == NULL)
764 				err(1, "-r option");
765 			break;
766 		default:
767 			usage();
768 			/* NOTREACHED */
769 		}
770 	}
771 
772 	argc -= optind;
773 	argv += optind;
774 
775 	if (argc == 1)
776 		path = argv[0];
777 	else
778 		usage_blame();
779 
780 	cwd = getcwd(NULL, 0);
781 	if (cwd == NULL) {
782 		error = got_error_from_errno();
783 		goto done;
784 	}
785 	if (repo_path == NULL) {
786 		repo_path = strdup(cwd);
787 		if (repo_path == NULL) {
788 			error = got_error_from_errno();
789 			goto done;
790 		}
791 	}
792 
793 	error = got_repo_open(&repo, repo_path);
794 	if (error != NULL)
795 		goto done;
796 
797 	error = got_repo_map_path(&in_repo_path, repo, path);
798 	if (error != NULL)
799 		goto done;
800 
801 	if (commit_id_str == NULL) {
802 		struct got_reference *head_ref;
803 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
804 		if (error != NULL)
805 			goto done;
806 		error = got_ref_resolve(&commit_id, repo, head_ref);
807 		got_ref_close(head_ref);
808 		if (error != NULL)
809 			goto done;
810 	} else {
811 		struct got_object *obj;
812 		error = got_object_open_by_id_str(&obj, repo, commit_id_str);
813 		if (error != NULL)
814 			goto done;
815 		commit_id = got_object_id_dup(got_object_get_id(obj));
816 		if (commit_id == NULL)
817 			error = got_error_from_errno();
818 		got_object_close(obj);
819 	}
820 
821 	error = got_blame(in_repo_path, commit_id, repo, stdout);
822 done:
823 	free(in_repo_path);
824 	free(repo_path);
825 	free(cwd);
826 	free(commit_id);
827 	if (repo) {
828 		const struct got_error *repo_error;
829 		repo_error = got_repo_close(repo);
830 		if (error == NULL)
831 			error = repo_error;
832 	}
833 	return error;
834 }
835 
836 #ifdef notyet
837 static const struct got_error *
838 cmd_status(int argc __unused, char *argv[] __unused)
839 {
840 	git_repository *repo = NULL;
841 	git_status_list *status;
842 	git_status_options statusopts;
843 	size_t i;
844 
845 	git_libgit2_init();
846 
847 	if (git_repository_open_ext(&repo, ".", 0, NULL))
848 		errx(1, "git_repository_open: %s", giterr_last()->message);
849 
850 	if (git_repository_is_bare(repo))
851 		errx(1, "bar repository");
852 
853 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
854 		errx(1, "git_status_init_options: %s", giterr_last()->message);
855 
856 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
857 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
858 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
859 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
860 
861 	if (git_status_list_new(&status, repo, &statusopts))
862 		errx(1, "git_status_list_new: %s", giterr_last()->message);
863 
864 	for (i = 0; i < git_status_list_entrycount(status); i++) {
865 		const git_status_entry *se;
866 
867 		se = git_status_byindex(status, i);
868 		switch (se->status) {
869 		case GIT_STATUS_WT_NEW:
870 			printf("? %s\n", se->index_to_workdir->new_file.path);
871 			break;
872 		case GIT_STATUS_WT_MODIFIED:
873 			printf("M %s\n", se->index_to_workdir->new_file.path);
874 			break;
875 		case GIT_STATUS_WT_DELETED:
876 			printf("R %s\n", se->index_to_workdir->new_file.path);
877 			break;
878 		case GIT_STATUS_WT_RENAMED:
879 			printf("m %s -> %s\n",
880 			    se->index_to_workdir->old_file.path,
881 			    se->index_to_workdir->new_file.path);
882 			break;
883 		case GIT_STATUS_WT_TYPECHANGE:
884 			printf("t %s\n", se->index_to_workdir->new_file.path);
885 			break;
886 		case GIT_STATUS_INDEX_NEW:
887 			printf("A %s\n", se->head_to_index->new_file.path);
888 			break;
889 		case GIT_STATUS_INDEX_MODIFIED:
890 			printf("M %s\n", se->head_to_index->old_file.path);
891 			break;
892 		case GIT_STATUS_INDEX_DELETED:
893 			printf("R %s\n", se->head_to_index->old_file.path);
894 			break;
895 		case GIT_STATUS_INDEX_RENAMED:
896 			printf("m %s -> %s\n",
897 			    se->head_to_index->old_file.path,
898 			    se->head_to_index->new_file.path);
899 			break;
900 		case GIT_STATUS_INDEX_TYPECHANGE:
901 			printf("t %s\n", se->head_to_index->old_file.path);
902 			break;
903 		case GIT_STATUS_CURRENT:
904 		default:
905 			break;
906 		}
907 	}
908 
909 	git_status_list_free(status);
910 	git_repository_free(repo);
911 	git_libgit2_shutdown();
912 
913 	return 0;
914 }
915 #endif