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Date:: Sat Sep 8 14:40:28 2018 UTC
Message:: implement fork+exec (and by the way, fix the build...)
Actions:: History | Blame | Raw File
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 	datestr = get_datestr(&author_time, datebuf);
335 	printf("author: %s  %s UTC\n", commit->author, datestr);
336 	if (strcmp(commit->author, commit->committer) != 0 ||
337 	    author_time != committer_time) {
338 		datestr = get_datestr(&committer_time, datebuf);
339 		printf("committer: %s  %s UTC\n", commit->committer, datestr);
340 	}
341 	if (commit->nparents > 1) {
342 		struct got_object_qid *qid;
343 		int n = 1;
344 		SIMPLEQ_FOREACH(qid, &commit->parent_ids, entry) {
345 			err = got_object_id_str(&id_str, qid->id);
346 			if (err)
347 				return err;
348 			printf("parent %d: %s\n", n++, id_str);
349 			free(id_str);
350 		}
351 	}
352 
353 	logmsg0 = strdup(commit->logmsg);
354 	if (logmsg0 == NULL)
355 		return got_error_from_errno();
356 
357 	logmsg = logmsg0;
358 	do {
359 		line = strsep(&logmsg, "\n");
360 		if (line)
361 			printf(" %s\n", line);
362 	} while (line);
363 	free(logmsg0);
364 
365 	if (show_patch) {
366 		err = print_patch(commit, id, repo);
367 		if (err == 0)
368 			printf("\n");
369 	}
370 
371 	return err;
372 }
373 
374 static const struct got_error *
375 print_commits(struct got_object *root_obj, struct got_object_id *root_id,
376     struct got_repository *repo, char *path, int show_patch, int limit,
377     int first_parent_traversal)
378 {
379 	const struct got_error *err;
380 	struct got_commit_graph *graph;
381 	int ncommits, found_obj = 0;
382 	int is_root_path = (strcmp(path, "/") == 0);
383 
384 	err = got_commit_graph_open(&graph, root_id, first_parent_traversal,
385 	    repo);
386 	if (err)
387 		return err;
388 	err = got_commit_graph_iter_start(graph, root_id);
389 	if (err)
390 		goto done;
391 	do {
392 		struct got_commit_object *commit;
393 		struct got_object_id *id;
394 
395 		err = got_commit_graph_iter_next(&id, graph);
396 		if (err) {
397 			if (err->code == GOT_ERR_ITER_COMPLETED) {
398 				err = NULL;
399 				break;
400 			}
401 			if (err->code != GOT_ERR_ITER_NEED_MORE)
402 				break;
403 			err = got_commit_graph_fetch_commits(&ncommits,
404 			    graph, 1, repo);
405 			if (err)
406 				break;
407 			else
408 				continue;
409 		}
410 		if (id == NULL)
411 			break;
412 
413 		err = got_object_open_as_commit(&commit, repo, id);
414 		if (err)
415 			break;
416 		if (!is_root_path) {
417 			struct got_object *obj;
418 			struct got_object_qid *pid;
419 			int changed = 0;
420 
421 			err = got_object_open_by_path(&obj, repo, id, path);
422 			if (err) {
423 				got_object_commit_close(commit);
424 				if (err->code == GOT_ERR_NO_OBJ && found_obj) {
425 					/*
426 					 * History of the path stops here
427 					 * on the current commit's branch.
428 					 * Keep logging on other branches.
429 					 */
430 					err = NULL;
431 					continue;
432 				}
433 				break;
434 			}
435 			found_obj = 1;
436 
437 			pid = SIMPLEQ_FIRST(&commit->parent_ids);
438 			if (pid != NULL) {
439 				struct got_object *pobj;
440 				err = got_object_open_by_path(&pobj, repo,
441 				    pid->id, path);
442 				if (err) {
443 					if (err->code != GOT_ERR_NO_OBJ) {
444 						got_object_close(obj);
445 						got_object_commit_close(commit);
446 						break;
447 					}
448 					err = NULL;
449 					changed = 1;
450 				} else {
451 					struct got_object_id *id, *pid;
452 					id = got_object_get_id(obj);
453 					if (id == NULL) {
454 						err = got_error_from_errno();
455 						got_object_close(obj);
456 						break;
457 					}
458 					pid = got_object_get_id(pobj);
459 					if (pid == NULL) {
460 						err = got_error_from_errno();
461 						free(id);
462 						got_object_close(obj);
463 						got_object_close(pobj);
464 						break;
465 					}
466 					changed =
467 					    (got_object_id_cmp(id, pid) != 0);
468 					got_object_close(pobj);
469 					free(id);
470 					free(pid);
471 				}
472 			}
473 			got_object_close(obj);
474 			if (!changed) {
475 				got_object_commit_close(commit);
476 				continue;
477 			}
478 		}
479 		err = print_commit(commit, id, repo, show_patch);
480 		got_object_commit_close(commit);
481 		if (err || (limit && --limit == 0))
482 			break;
483 	} while (ncommits > 0);
484 done:
485 	got_commit_graph_close(graph);
486 	return err;
487 }
488 
489 __dead static void
490 usage_log(void)
491 {
492 	fprintf(stderr, "usage: %s log [-c commit] [-f] [ -l N ] [-p] "
493 	    "[-r repository-path] [path]\n", getprogname());
494 	exit(1);
495 }
496 
497 static const struct got_error *
498 cmd_log(int argc, char *argv[])
499 {
500 	const struct got_error *error;
501 	struct got_repository *repo = NULL;
502 	struct got_object_id *id = NULL;
503 	struct got_object *obj = NULL;
504 	char *repo_path = NULL, *path = NULL, *cwd = NULL, *in_repo_path = NULL;
505 	char *start_commit = NULL;
506 	int ch;
507 	int show_patch = 0, limit = 0, first_parent_traversal = 0;
508 	const char *errstr;
509 
510 #ifndef PROFILE
511 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
512 	    == -1)
513 		err(1, "pledge");
514 #endif
515 
516 	while ((ch = getopt(argc, argv, "pc:l:fr:")) != -1) {
517 		switch (ch) {
518 		case 'p':
519 			show_patch = 1;
520 			break;
521 		case 'c':
522 			start_commit = optarg;
523 			break;
524 		case 'l':
525 			limit = strtonum(optarg, 1, INT_MAX, &errstr);
526 			if (errstr != NULL)
527 				err(1, "-l option %s", errstr);
528 			break;
529 		case 'f':
530 			first_parent_traversal = 1;
531 			break;
532 		case 'r':
533 			repo_path = realpath(optarg, NULL);
534 			if (repo_path == NULL)
535 				err(1, "-r option");
536 			break;
537 		default:
538 			usage();
539 			/* NOTREACHED */
540 		}
541 	}
542 
543 	argc -= optind;
544 	argv += optind;
545 
546 	if (argc == 0)
547 		path = strdup("");
548 	else if (argc == 1)
549 		path = strdup(argv[0]);
550 	else
551 		usage_log();
552 	if (path == NULL)
553 		return got_error_from_errno();
554 
555 	cwd = getcwd(NULL, 0);
556 	if (cwd == NULL) {
557 		error = got_error_from_errno();
558 		goto done;
559 	}
560 	if (repo_path == NULL) {
561 		repo_path = strdup(cwd);
562 		if (repo_path == NULL) {
563 			error = got_error_from_errno();
564 			goto done;
565 		}
566 	}
567 
568 	error = got_repo_open(&repo, repo_path);
569 	if (error != NULL)
570 		goto done;
571 
572 	if (start_commit == NULL) {
573 		struct got_reference *head_ref;
574 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
575 		if (error != NULL)
576 			return error;
577 		error = got_ref_resolve(&id, repo, head_ref);
578 		got_ref_close(head_ref);
579 		if (error != NULL)
580 			return error;
581 		error = got_object_open(&obj, repo, id);
582 	} else {
583 		struct got_reference *ref;
584 		error = got_ref_open(&ref, repo, start_commit);
585 		if (error == NULL) {
586 			error = got_ref_resolve(&id, repo, ref);
587 			got_ref_close(ref);
588 			if (error != NULL)
589 				return error;
590 			error = got_object_open(&obj, repo, id);
591 			if (error != NULL)
592 				return error;
593 		}
594 		if (obj == NULL) {
595 			error = got_object_open_by_id_str(&obj, repo,
596 			    start_commit);
597 			if (error != NULL)
598 				return error;
599 			id = got_object_get_id(obj);
600 			if (id == NULL)
601 				error = got_error_from_errno();
602 		}
603 	}
604 	if (error != NULL)
605 		goto done;
606 	if (got_object_get_type(obj) != GOT_OBJ_TYPE_COMMIT) {
607 		error = got_error(GOT_ERR_OBJ_TYPE);
608 		goto done;
609 	}
610 
611 	error = got_repo_map_path(&in_repo_path, repo, path);
612 	if (error != NULL)
613 		goto done;
614 	if (in_repo_path) {
615 		free(path);
616 		path = in_repo_path;
617 	}
618 
619 	error = print_commits(obj, id, repo, path, show_patch,
620 	    limit, first_parent_traversal);
621 done:
622 	free(path);
623 	free(repo_path);
624 	free(cwd);
625 	if (obj)
626 		got_object_close(obj);
627 	free(id);
628 	if (repo) {
629 		const struct got_error *repo_error;
630 		repo_error = got_repo_close(repo);
631 		if (error == NULL)
632 			error = repo_error;
633 	}
634 	return error;
635 }
636 
637 __dead static void
638 usage_diff(void)
639 {
640 	fprintf(stderr, "usage: %s diff [repository-path] object1 object2\n",
641 	    getprogname());
642 	exit(1);
643 }
644 
645 static const struct got_error *
646 cmd_diff(int argc, char *argv[])
647 {
648 	const struct got_error *error;
649 	struct got_repository *repo = NULL;
650 	struct got_object_id *id1 = NULL, *id2 = NULL;
651 	struct got_object *obj1 = NULL, *obj2 = NULL;
652 	char *repo_path = NULL;
653 	char *obj_id_str1 = NULL, *obj_id_str2 = NULL;
654 	int ch;
655 
656 #ifndef PROFILE
657 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
658 	    == -1)
659 		err(1, "pledge");
660 #endif
661 
662 	while ((ch = getopt(argc, argv, "")) != -1) {
663 		switch (ch) {
664 		default:
665 			usage();
666 			/* NOTREACHED */
667 		}
668 	}
669 
670 	argc -= optind;
671 	argv += optind;
672 
673 	if (argc == 0) {
674 		usage_diff(); /* TODO show local worktree changes */
675 	} else if (argc == 2) {
676 		repo_path = getcwd(NULL, 0);
677 		if (repo_path == NULL)
678 			return got_error_from_errno();
679 		obj_id_str1 = argv[0];
680 		obj_id_str2 = argv[1];
681 	} else if (argc == 3) {
682 		repo_path = realpath(argv[0], NULL);
683 		if (repo_path == NULL)
684 			return got_error_from_errno();
685 		obj_id_str1 = argv[1];
686 		obj_id_str2 = argv[2];
687 	} else
688 		usage_diff();
689 
690 	error = got_repo_open(&repo, repo_path);
691 	free(repo_path);
692 	if (error != NULL)
693 		goto done;
694 
695 	error = got_object_open_by_id_str(&obj1, repo, obj_id_str1);
696 	if (error == NULL) {
697 		id1 = got_object_get_id(obj1);
698 		if (id1 == NULL)
699 			error = got_error_from_errno();
700 	}
701 	if (error != NULL)
702 		goto done;
703 
704 	error = got_object_open_by_id_str(&obj2, repo, obj_id_str2);
705 	if (error == NULL) {
706 		id2 = got_object_get_id(obj2);
707 		if (id2 == NULL)
708 			error = got_error_from_errno();
709 	}
710 	if (error != NULL)
711 		goto done;
712 
713 	if (got_object_get_type(obj1) != got_object_get_type(obj2)) {
714 		error = got_error(GOT_ERR_OBJ_TYPE);
715 		goto done;
716 	}
717 
718 	switch (got_object_get_type(obj1)) {
719 	case GOT_OBJ_TYPE_BLOB:
720 		error = got_diff_objects_as_blobs(obj1, obj2, repo, stdout);
721 		break;
722 	case GOT_OBJ_TYPE_TREE:
723 		error = got_diff_objects_as_trees(obj1, obj2, repo, stdout);
724 		break;
725 	case GOT_OBJ_TYPE_COMMIT:
726 		error = got_diff_objects_as_commits(obj1, obj2, repo, stdout);
727 		break;
728 	default:
729 		error = got_error(GOT_ERR_OBJ_TYPE);
730 	}
731 
732 done:
733 	if (obj1)
734 		got_object_close(obj1);
735 	if (obj2)
736 		got_object_close(obj2);
737 	if (id1)
738 		free(id1);
739 	if (id2)
740 		free(id2);
741 	if (repo) {
742 		const struct got_error *repo_error;
743 		repo_error = got_repo_close(repo);
744 		if (error == NULL)
745 			error = repo_error;
746 	}
747 	return error;
748 }
749 
750 __dead static void
751 usage_blame(void)
752 {
753 	fprintf(stderr, "usage: %s blame [-c commit] [-r repository-path] path\n",
754 	    getprogname());
755 	exit(1);
756 }
757 
758 static const struct got_error *
759 cmd_blame(int argc, char *argv[])
760 {
761 	const struct got_error *error;
762 	struct got_repository *repo = NULL;
763 	char *path, *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
764 	struct got_object_id *commit_id = NULL;
765 	char *commit_id_str = NULL;
766 	int ch;
767 
768 #ifndef PROFILE
769 	if (pledge("stdio rpath wpath cpath flock proc exec sendfd", NULL)
770 	    == -1)
771 		err(1, "pledge");
772 #endif
773 
774 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
775 		switch (ch) {
776 		case 'c':
777 			commit_id_str = optarg;
778 			break;
779 		case 'r':
780 			repo_path = realpath(optarg, NULL);
781 			if (repo_path == NULL)
782 				err(1, "-r option");
783 			break;
784 		default:
785 			usage();
786 			/* NOTREACHED */
787 		}
788 	}
789 
790 	argc -= optind;
791 	argv += optind;
792 
793 	if (argc == 1)
794 		path = argv[0];
795 	else
796 		usage_blame();
797 
798 	cwd = getcwd(NULL, 0);
799 	if (cwd == NULL) {
800 		error = got_error_from_errno();
801 		goto done;
802 	}
803 	if (repo_path == NULL) {
804 		repo_path = strdup(cwd);
805 		if (repo_path == NULL) {
806 			error = got_error_from_errno();
807 			goto done;
808 		}
809 	}
810 
811 	error = got_repo_open(&repo, repo_path);
812 	if (error != NULL)
813 		goto done;
814 
815 	error = got_repo_map_path(&in_repo_path, repo, path);
816 	if (error != NULL)
817 		goto done;
818 
819 	if (commit_id_str == NULL) {
820 		struct got_reference *head_ref;
821 		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
822 		if (error != NULL)
823 			goto done;
824 		error = got_ref_resolve(&commit_id, repo, head_ref);
825 		got_ref_close(head_ref);
826 		if (error != NULL)
827 			goto done;
828 	} else {
829 		struct got_object *obj;
830 		error = got_object_open_by_id_str(&obj, repo, commit_id_str);
831 		if (error != NULL)
832 			goto done;
833 		commit_id = got_object_get_id(obj);
834 		if (commit_id == NULL)
835 			error = got_error_from_errno();
836 		got_object_close(obj);
837 	}
838 
839 	error = got_blame(in_repo_path, commit_id, repo, stdout);
840 done:
841 	free(in_repo_path);
842 	free(repo_path);
843 	free(cwd);
844 	free(commit_id);
845 	if (repo) {
846 		const struct got_error *repo_error;
847 		repo_error = got_repo_close(repo);
848 		if (error == NULL)
849 			error = repo_error;
850 	}
851 	return error;
852 }
853 
854 #ifdef notyet
855 static const struct got_error *
856 cmd_status(int argc __unused, char *argv[] __unused)
857 {
858 	git_repository *repo = NULL;
859 	git_status_list *status;
860 	git_status_options statusopts;
861 	size_t i;
862 
863 	git_libgit2_init();
864 
865 	if (git_repository_open_ext(&repo, ".", 0, NULL))
866 		errx(1, "git_repository_open: %s", giterr_last()->message);
867 
868 	if (git_repository_is_bare(repo))
869 		errx(1, "bar repository");
870 
871 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
872 		errx(1, "git_status_init_options: %s", giterr_last()->message);
873 
874 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
875 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
876 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
877 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
878 
879 	if (git_status_list_new(&status, repo, &statusopts))
880 		errx(1, "git_status_list_new: %s", giterr_last()->message);
881 
882 	for (i = 0; i < git_status_list_entrycount(status); i++) {
883 		const git_status_entry *se;
884 
885 		se = git_status_byindex(status, i);
886 		switch (se->status) {
887 		case GIT_STATUS_WT_NEW:
888 			printf("? %s\n", se->index_to_workdir->new_file.path);
889 			break;
890 		case GIT_STATUS_WT_MODIFIED:
891 			printf("M %s\n", se->index_to_workdir->new_file.path);
892 			break;
893 		case GIT_STATUS_WT_DELETED:
894 			printf("R %s\n", se->index_to_workdir->new_file.path);
895 			break;
896 		case GIT_STATUS_WT_RENAMED:
897 			printf("m %s -> %s\n",
898 			    se->index_to_workdir->old_file.path,
899 			    se->index_to_workdir->new_file.path);
900 			break;
901 		case GIT_STATUS_WT_TYPECHANGE:
902 			printf("t %s\n", se->index_to_workdir->new_file.path);
903 			break;
904 		case GIT_STATUS_INDEX_NEW:
905 			printf("A %s\n", se->head_to_index->new_file.path);
906 			break;
907 		case GIT_STATUS_INDEX_MODIFIED:
908 			printf("M %s\n", se->head_to_index->old_file.path);
909 			break;
910 		case GIT_STATUS_INDEX_DELETED:
911 			printf("R %s\n", se->head_to_index->old_file.path);
912 			break;
913 		case GIT_STATUS_INDEX_RENAMED:
914 			printf("m %s -> %s\n",
915 			    se->head_to_index->old_file.path,
916 			    se->head_to_index->new_file.path);
917 			break;
918 		case GIT_STATUS_INDEX_TYPECHANGE:
919 			printf("t %s\n", se->head_to_index->old_file.path);
920 			break;
921 		case GIT_STATUS_CURRENT:
922 		default:
923 			break;
924 		}
925 	}
926 
927 	git_status_list_free(status);
928 	git_repository_free(repo);
929 	git_libgit2_shutdown();
930 
931 	return 0;
932 }
933 #endif