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Date:: Sat Sep 15 11:52:06 2018 UTC
Message:: replace got_object_open_by_path() with got_object_id_by_path()
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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_id *obj_id, const char *path, struct got_repository *repo)
375 {
376 	const struct got_error *err = NULL;
377 	struct got_object_id *obj_id2;
378 
379 	err = got_object_id_by_path(&obj_id2, repo, commit_id, path);
380 	if (err) {
381 		if (err->code != GOT_ERR_NO_OBJ)
382 			return err;
383 		*changed = 1;
384 		return NULL;
385 	}
386 
387 	*changed = (got_object_id_cmp(obj_id, obj_id2) != 0);
388 	free(obj_id2);
389 	return NULL;
390 }
391 
392 static const struct got_error *
393 print_commits(struct got_object *root_obj, struct got_object_id *root_id,
394     struct got_repository *repo, char *path, int show_patch, int limit,
395     int first_parent_traversal)
396 {
397 	const struct got_error *err;
398 	struct got_commit_graph *graph;
399 	int ncommits, found_obj = 0;
400 	int is_root_path = (strcmp(path, "/") == 0);
401 
402 	err = got_commit_graph_open(&graph, root_id, first_parent_traversal,
403 	    repo);
404 	if (err)
405 		return err;
406 	err = got_commit_graph_iter_start(graph, root_id);
407 	if (err)
408 		goto done;
409 	do {
410 		struct got_commit_object *commit;
411 		struct got_object_id *id;
412 
413 		err = got_commit_graph_iter_next(&id, graph);
414 		if (err) {
415 			if (err->code == GOT_ERR_ITER_COMPLETED) {
416 				err = NULL;
417 				break;
418 			}
419 			if (err->code != GOT_ERR_ITER_NEED_MORE)
420 				break;
421 			err = got_commit_graph_fetch_commits(&ncommits,
422 			    graph, 1, repo);
423 			if (err)
424 				break;
425 			else
426 				continue;
427 		}
428 		if (id == NULL)
429 			break;
430 
431 		err = got_object_open_as_commit(&commit, repo, id);
432 		if (err)
433 			break;
434 		if (!is_root_path) {
435 			struct got_object_id *obj_id = NULL;
436 			struct got_object_qid *pid;
437 			int changed = 0;
438 
439 			err = got_object_id_by_path(&obj_id, repo, id, path);
440 			if (err) {
441 				got_object_commit_close(commit);
442 				if (err->code == GOT_ERR_NO_OBJ && found_obj) {
443 					/*
444 					 * History of the path stops here
445 					 * on the current commit's branch.
446 					 * Keep logging on other branches.
447 					 */
448 					err = NULL;
449 					continue;
450 				}
451 				break;
452 			}
453 			found_obj = 1;
454 
455 			pid = SIMPLEQ_FIRST(&commit->parent_ids);
456 			if (pid) {
457 				err = detect_change(&changed, pid->id, obj_id,
458 				    path, repo);
459 				if (err) {
460 					free(obj_id);
461 					got_object_commit_close(commit);
462 					break;
463 				}
464 			}
465 			free(obj_id);
466 			if (!changed) {
467 				got_object_commit_close(commit);
468 				continue;
469 			}
470 		}
471 		err = print_commit(commit, id, repo, show_patch);
472 		got_object_commit_close(commit);
473 		if (err || (limit && --limit == 0))
474 			break;
475 	} while (ncommits > 0);
476 done:
477 	got_commit_graph_close(graph);
478 	return err;
479 }
480 
481 __dead static void
482 usage_log(void)
483 {
484 	fprintf(stderr, "usage: %s log [-c commit] [-f] [ -l N ] [-p] "
485 	    "[-r repository-path] [path]\n", getprogname());
486 	exit(1);
487 }
488 
489 static const struct got_error *
490 cmd_log(int argc, char *argv[])
491 {
492 	const struct got_error *error;
493 	struct got_repository *repo = NULL;
494 	struct got_object_id *id = NULL;
495 	struct got_object *obj = NULL;
496 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
497 	char *start_commit = NULL;
498 	int ch;
499 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
500 	const char *errstr;
501 
502 #ifndef PROFILE
503 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
504 	    == -1)
505 		err(1, "pledge");
506 #endif
507 
508 	while ((ch = getopt(argc, argv, "pc:l:fr:")) != -1) {
509 		switch (ch) {
510 		case 'p':
511 			show_patch = 1;
512 			break;
513 		case 'c':
514 			start_commit = optarg;
515 			break;
516 		case 'l':
517 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
518 			if (errstr != NULL)
519 				err(1, "-l option %s", errstr);
520 			break;
521 		case 'f':
522 			first_parent_traversal = 1;
523 			break;
524 		case 'r':
525 			repo_path = realpath(optarg, NULL);
526 			if (repo_path == NULL)
527 				err(1, "-r option");
528 			break;
529 		default:
530 			usage();
531 			/* NOTREACHED */
532 		}
533 	}
534 
535 	argc -= optind;
536 	argv += optind;
537 
538 	if (argc == 0)
539 		path = strdup("");
540 	else if (argc == 1)
541 		path = strdup(argv[0]);
542 	else
543 		usage_log();
544 	if (path == NULL)
545 		return got_error_from_errno();
546 
547 	cwd = getcwd(NULL, 0);
548 	if (cwd == NULL) {
549 		error = got_error_from_errno();
550 		goto done;
551 	}
552 	if (repo_path == NULL) {
553 		repo_path = strdup(cwd);
554 		if (repo_path == NULL) {
555 			error = got_error_from_errno();
556 			goto done;
557 		}
558 	}
559 
560 	error = got_repo_open(&repo, repo_path);
561 	if (error != NULL)
562 		goto done;
563 
564 	if (start_commit == NULL) {
565 		struct got_reference *head_ref;
566 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
567 		if (error != NULL)
568 			return error;
569 		error = got_ref_resolve(&id, repo, head_ref);
570 		got_ref_close(head_ref);
571 		if (error != NULL)
572 			return error;
573 		error = got_object_open(&obj, repo, id);
574 	} else {
575 		struct got_reference *ref;
576 		error = got_ref_open(&ref, repo, start_commit);
577 		if (error == NULL) {
578 			error = got_ref_resolve(&id, repo, ref);
579 			got_ref_close(ref);
580 			if (error != NULL)
581 				return error;
582 			error = got_object_open(&obj, repo, id);
583 			if (error != NULL)
584 				return error;
585 		}
586 		if (obj == NULL) {
587 			error = got_object_open_by_id_str(&obj, repo,
588 			    start_commit);
589 			if (error != NULL)
590 				return error;
591 			id = got_object_id_dup(got_object_get_id(obj));
592 			if (id == NULL)
593 				error = got_error_from_errno();
594 		}
595 	}
596 	if (error != NULL)
597 		goto done;
598 	if (got_object_get_type(obj) != GOT_OBJ_TYPE_COMMIT) {
599 		error = got_error(GOT_ERR_OBJ_TYPE);
600 		goto done;
601 	}
602 
603 	error = got_repo_map_path(&in_repo_path, repo, path);
604 	if (error != NULL)
605 		goto done;
606 	if (in_repo_path) {
607 		free(path);
608 		path = in_repo_path;
609 	}
610 
611 	error = print_commits(obj, id, repo, path, show_patch,
612 	    limit, first_parent_traversal);
613 done:
614 	free(path);
615 	free(repo_path);
616 	free(cwd);
617 	if (obj)
618 		got_object_close(obj);
619 	free(id);
620 	if (repo) {
621 		const struct got_error *repo_error;
622 		repo_error = got_repo_close(repo);
623 		if (error == NULL)
624 			error = repo_error;
625 	}
626 	return error;
627 }
628 
629 __dead static void
630 usage_diff(void)
631 {
632 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
633 	    getprogname());
634 	exit(1);
635 }
636 
637 static const struct got_error *
638 cmd_diff(int argc, char *argv[])
639 {
640 	const struct got_error *error;
641 	struct got_repository *repo = NULL;
642 	struct got_object *obj1 = NULL, *obj2 = NULL;
643 	char *repo_path = NULL;
644 	char *obj_id_str1 = NULL, *obj_id_str2 = NULL;
645 	int ch;
646 
647 #ifndef PROFILE
648 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
649 	    == -1)
650 		err(1, "pledge");
651 #endif
652 
653 	while ((ch = getopt(argc, argv, "")) != -1) {
654 		switch (ch) {
655 		default:
656 			usage();
657 			/* NOTREACHED */
658 		}
659 	}
660 
661 	argc -= optind;
662 	argv += optind;
663 
664 	if (argc == 0) {
665 		usage_diff(); /* TODO show local worktree changes */
666 	} else if (argc == 2) {
667 		repo_path = getcwd(NULL, 0);
668 		if (repo_path == NULL)
669 			return got_error_from_errno();
670 		obj_id_str1 = argv[0];
671 		obj_id_str2 = argv[1];
672 	} else if (argc == 3) {
673 		repo_path = realpath(argv[0], NULL);
674 		if (repo_path == NULL)
675 			return got_error_from_errno();
676 		obj_id_str1 = argv[1];
677 		obj_id_str2 = argv[2];
678 	} else
679 		usage_diff();
680 
681 	error = got_repo_open(&repo, repo_path);
682 	free(repo_path);
683 	if (error != NULL)
684 		goto done;
685 
686 	error = got_object_open_by_id_str(&obj1, repo, obj_id_str1);
687 	if (error)
688 		goto done;
689 
690 	error = got_object_open_by_id_str(&obj2, repo, obj_id_str2);
691 	if (error)
692 		goto done;
693 
694 	if (got_object_get_type(obj1) != got_object_get_type(obj2)) {
695 		error = got_error(GOT_ERR_OBJ_TYPE);
696 		goto done;
697 	}
698 
699 	switch (got_object_get_type(obj1)) {
700 	case GOT_OBJ_TYPE_BLOB:
701 		error = got_diff_objects_as_blobs(obj1, obj2, NULL, NULL,
702 		    repo, stdout);
703 		break;
704 	case GOT_OBJ_TYPE_TREE:
705 		error = got_diff_objects_as_trees(obj1, obj2, "", "", repo,
706 		    stdout);
707 		break;
708 	case GOT_OBJ_TYPE_COMMIT:
709 		error = got_diff_objects_as_commits(obj1, obj2, repo, stdout);
710 		break;
711 	default:
712 		error = got_error(GOT_ERR_OBJ_TYPE);
713 	}
714 
715 done:
716 	if (obj1)
717 		got_object_close(obj1);
718 	if (obj2)
719 		got_object_close(obj2);
720 	if (repo) {
721 		const struct got_error *repo_error;
722 		repo_error = got_repo_close(repo);
723 		if (error == NULL)
724 			error = repo_error;
725 	}
726 	return error;
727 }
728 
729 __dead static void
730 usage_blame(void)
731 {
732 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
733 	    getprogname());
734 	exit(1);
735 }
736 
737 static const struct got_error *
738 cmd_blame(int argc, char *argv[])
739 {
740 	const struct got_error *error;
741 	struct got_repository *repo = NULL;
742 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
743 	struct got_object_id *commit_id = NULL;
744 	char *commit_id_str = NULL;
745 	int ch;
746 
747 #ifndef PROFILE
748 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
749 	    == -1)
750 		err(1, "pledge");
751 #endif
752 
753 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
754 		switch (ch) {
755 		case 'c':
756 			commit_id_str = optarg;
757 			break;
758 		case 'r':
759 			repo_path = realpath(optarg, NULL);
760 			if (repo_path == NULL)
761 				err(1, "-r option");
762 			break;
763 		default:
764 			usage();
765 			/* NOTREACHED */
766 		}
767 	}
768 
769 	argc -= optind;
770 	argv += optind;
771 
772 	if (argc == 1)
773 		path = argv[0];
774 	else
775 		usage_blame();
776 
777 	cwd = getcwd(NULL, 0);
778 	if (cwd == NULL) {
779 		error = got_error_from_errno();
780 		goto done;
781 	}
782 	if (repo_path == NULL) {
783 		repo_path = strdup(cwd);
784 		if (repo_path == NULL) {
785 			error = got_error_from_errno();
786 			goto done;
787 		}
788 	}
789 
790 	error = got_repo_open(&repo, repo_path);
791 	if (error != NULL)
792 		goto done;
793 
794 	error = got_repo_map_path(&in_repo_path, repo, path);
795 	if (error != NULL)
796 		goto done;
797 
798 	if (commit_id_str == NULL) {
799 		struct got_reference *head_ref;
800 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
801 		if (error != NULL)
802 			goto done;
803 		error = got_ref_resolve(&commit_id, repo, head_ref);
804 		got_ref_close(head_ref);
805 		if (error != NULL)
806 			goto done;
807 	} else {
808 		struct got_object *obj;
809 		error = got_object_open_by_id_str(&obj, repo, commit_id_str);
810 		if (error != NULL)
811 			goto done;
812 		commit_id = got_object_id_dup(got_object_get_id(obj));
813 		if (commit_id == NULL)
814 			error = got_error_from_errno();
815 		got_object_close(obj);
816 	}
817 
818 	error = got_blame(in_repo_path, commit_id, repo, stdout);
819 done:
820 	free(in_repo_path);
821 	free(repo_path);
822 	free(cwd);
823 	free(commit_id);
824 	if (repo) {
825 		const struct got_error *repo_error;
826 		repo_error = got_repo_close(repo);
827 		if (error == NULL)
828 			error = repo_error;
829 	}
830 	return error;
831 }
832 
833 #ifdef notyet
834 static const struct got_error *
835 cmd_status(int argc __unused, char *argv[] __unused)
836 {
837 	git_repository *repo = NULL;
838 	git_status_list *status;
839 	git_status_options statusopts;
840 	size_t i;
841 
842 	git_libgit2_init();
843 
844 	if (git_repository_open_ext(&repo, ".", 0, NULL))
845 		errx(1, "git_repository_open: %s", giterr_last()->message);
846 
847 	if (git_repository_is_bare(repo))
848 		errx(1, "bar repository");
849 
850 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
851 		errx(1, "git_status_init_options: %s", giterr_last()->message);
852 
853 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
854 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
855 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
856 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
857 
858 	if (git_status_list_new(&status, repo, &statusopts))
859 		errx(1, "git_status_list_new: %s", giterr_last()->message);
860 
861 	for (i = 0; i < git_status_list_entrycount(status); i++) {
862 		const git_status_entry *se;
863 
864 		se = git_status_byindex(status, i);
865 		switch (se->status) {
866 		case GIT_STATUS_WT_NEW:
867 			printf("? %s\n", se->index_to_workdir->new_file.path);
868 			break;
869 		case GIT_STATUS_WT_MODIFIED:
870 			printf("M %s\n", se->index_to_workdir->new_file.path);
871 			break;
872 		case GIT_STATUS_WT_DELETED:
873 			printf("R %s\n", se->index_to_workdir->new_file.path);
874 			break;
875 		case GIT_STATUS_WT_RENAMED:
876 			printf("m %s -> %s\n",
877 			    se->index_to_workdir->old_file.path,
878 			    se->index_to_workdir->new_file.path);
879 			break;
880 		case GIT_STATUS_WT_TYPECHANGE:
881 			printf("t %s\n", se->index_to_workdir->new_file.path);
882 			break;
883 		case GIT_STATUS_INDEX_NEW:
884 			printf("A %s\n", se->head_to_index->new_file.path);
885 			break;
886 		case GIT_STATUS_INDEX_MODIFIED:
887 			printf("M %s\n", se->head_to_index->old_file.path);
888 			break;
889 		case GIT_STATUS_INDEX_DELETED:
890 			printf("R %s\n", se->head_to_index->old_file.path);
891 			break;
892 		case GIT_STATUS_INDEX_RENAMED:
893 			printf("m %s -> %s\n",
894 			    se->head_to_index->old_file.path,
895 			    se->head_to_index->new_file.path);
896 			break;
897 		case GIT_STATUS_INDEX_TYPECHANGE:
898 			printf("t %s\n", se->head_to_index->old_file.path);
899 			break;
900 		case GIT_STATUS_CURRENT:
901 		default:
902 			break;
903 		}
904 	}
905 
906 	git_status_list_free(status);
907 	git_repository_free(repo);
908 	git_libgit2_shutdown();
909 
910 	return 0;
911 }
912 #endif