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