1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 #include <sys/queue.h>
19 #include <sys/uio.h>
20 #include <sys/socket.h>
21 #include <sys/stat.h>
22 #include <sys/mman.h>
23 #include <sys/syslimits.h>
24 
25 #include <ctype.h>
26 #include <endian.h>
27 #include <fcntl.h>
28 #include <fnmatch.h>
29 #include <limits.h>
30 #include <dirent.h>
31 #include <stdlib.h>
32 #include <stdio.h>
33 #include <sha1.h>
34 #include <string.h>
35 #include <time.h>
36 #include <unistd.h>
37 #include <zlib.h>
38 #include <errno.h>
39 #include <libgen.h>
40 #include <stdint.h>
41 #include <imsg.h>
42 #include <uuid.h>
43 
44 #include "got_error.h"
45 #include "got_reference.h"
46 #include "got_repository.h"
47 #include "got_path.h"
48 #include "got_cancel.h"
49 #include "got_worktree.h"
50 #include "got_object.h"
51 
52 #include "got_lib_delta.h"
53 #include "got_lib_inflate.h"
54 #include "got_lib_object.h"
55 #include "got_lib_object_parse.h"
56 #include "got_lib_object_create.h"
57 #include "got_lib_pack.h"
58 #include "got_lib_privsep.h"
59 #include "got_lib_worktree.h"
60 #include "got_lib_sha1.h"
61 #include "got_lib_object_cache.h"
62 #include "got_lib_repository.h"
63 
64 #ifndef nitems
65 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
66 #endif
67 
68 const char *
69 got_repo_get_path(struct got_repository *repo)
70 {
71 	return repo->path;
72 }
73 
74 const char *
75 got_repo_get_path_git_dir(struct got_repository *repo)
76 {
77 	return repo->path_git_dir;
78 }
79 
80 const char *
81 got_repo_get_gitconfig_author_name(struct got_repository *repo)
82 {
83 	return repo->gitconfig_author_name;
84 }
85 
86 const char *
87 got_repo_get_gitconfig_author_email(struct got_repository *repo)
88 {
89 	return repo->gitconfig_author_email;
90 }
91 
92 const char *
93 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
94 {
95 	return repo->global_gitconfig_author_name;
96 }
97 
98 const char *
99 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
100 {
101 	return repo->global_gitconfig_author_email;
102 }
103 
104 const char *
105 got_repo_get_gitconfig_owner(struct got_repository *repo)
106 {
107 	return repo->gitconfig_owner;
108 }
109 
110 int
111 got_repo_is_bare(struct got_repository *repo)
112 {
113 	return (strcmp(repo->path, repo->path_git_dir) == 0);
114 }
115 
116 static char *
117 get_path_git_child(struct got_repository *repo, const char *basename)
118 {
119 	char *path_child;
120 	
121 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
122 	    basename) == -1)
123 		return NULL;
124 
125 	return path_child;
126 }
127 
128 char *
129 got_repo_get_path_objects(struct got_repository *repo)
130 {
131 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
132 }
133 
134 char *
135 got_repo_get_path_objects_pack(struct got_repository *repo)
136 {
137 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
138 }
139 
140 char *
141 got_repo_get_path_refs(struct got_repository *repo)
142 {
143 	return get_path_git_child(repo, GOT_REFS_DIR);
144 }
145 
146 char *
147 got_repo_get_path_packed_refs(struct got_repository *repo)
148 {
149 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
150 }
151 
152 static char *
153 get_path_head(struct got_repository *repo)
154 {
155 	return get_path_git_child(repo, GOT_HEAD_FILE);
156 }
157 
158 char *
159 got_repo_get_path_gitconfig(struct got_repository *repo)
160 {
161 	return get_path_git_child(repo, GOT_GITCONFIG);
162 }
163 
164 char *
165 got_repo_get_path_gotconfig(struct got_repository *repo)
166 {
167 	return get_path_git_child(repo, GOT_GOTCONFIG);
168 }
169 
170 void
171 got_repo_get_gitconfig_remotes(int *nremotes, struct got_remote_repo **remotes,
172     struct got_repository *repo)
173 {
174 	*nremotes = repo->ngitconfig_remotes;
175 	*remotes = repo->gitconfig_remotes;
176 }
177 
178 const char *
179 got_repo_get_gotconfig_author(struct got_repository *repo)
180 {
181 	return repo->gotconfig_author;
182 }
183 
184 void
185 got_repo_get_gotconfig_remotes(int *nremotes, struct got_remote_repo **remotes,
186     struct got_repository *repo)
187 {
188 	*nremotes = repo->ngotconfig_remotes;
189 	*remotes = repo->gotconfig_remotes;
190 }
191 
192 static int
193 is_git_repo(struct got_repository *repo)
194 {
195 	const char *path_git = got_repo_get_path_git_dir(repo);
196 	char *path_objects = got_repo_get_path_objects(repo);
197 	char *path_refs = got_repo_get_path_refs(repo);
198 	char *path_head = get_path_head(repo);
199 	int ret = 0;
200 	struct stat sb;
201 	struct got_reference *head_ref;
202 
203 	if (lstat(path_git, &sb) == -1)
204 		goto done;
205 	if (!S_ISDIR(sb.st_mode))
206 		goto done;
207 
208 	if (lstat(path_objects, &sb) == -1)
209 		goto done;
210 	if (!S_ISDIR(sb.st_mode))
211 		goto done;
212 
213 	if (lstat(path_refs, &sb) == -1)
214 		goto done;
215 	if (!S_ISDIR(sb.st_mode))
216 		goto done;
217 
218 	if (lstat(path_head, &sb) == -1)
219 		goto done;
220 	if (!S_ISREG(sb.st_mode))
221 		goto done;
222 
223 	/* Check if the HEAD reference can be opened. */
224 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
225 		goto done;
226 	got_ref_close(head_ref);
227 
228 	ret = 1;
229 done:
230 	free(path_objects);
231 	free(path_refs);
232 	free(path_head);
233 	return ret;
234 
235 }
236 
237 const struct got_error *
238 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
239     struct got_object *obj)
240 {
241 #ifndef GOT_NO_OBJ_CACHE
242 	const struct got_error *err = NULL;
243 	err = got_object_cache_add(&repo->objcache, id, obj);
244 	if (err) {
245 		if (err->code == GOT_ERR_OBJ_EXISTS ||
246 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
247 			err = NULL;
248 		return err;
249 	}
250 	obj->refcnt++;
251 #endif
252 	return NULL;
253 }
254 
255 struct got_object *
256 got_repo_get_cached_object(struct got_repository *repo,
257     struct got_object_id *id)
258 {
259 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
260 }
261 
262 const struct got_error *
263 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
264     struct got_tree_object *tree)
265 {
266 #ifndef GOT_NO_OBJ_CACHE
267 	const struct got_error *err = NULL;
268 	err = got_object_cache_add(&repo->treecache, id, tree);
269 	if (err) {
270 		if (err->code == GOT_ERR_OBJ_EXISTS ||
271 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
272 			err = NULL;
273 		return err;
274 	}
275 	tree->refcnt++;
276 #endif
277 	return NULL;
278 }
279 
280 struct got_tree_object *
281 got_repo_get_cached_tree(struct got_repository *repo,
282     struct got_object_id *id)
283 {
284 	return (struct got_tree_object *)got_object_cache_get(
285 	    &repo->treecache, id);
286 }
287 
288 const struct got_error *
289 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
290     struct got_commit_object *commit)
291 {
292 #ifndef GOT_NO_OBJ_CACHE
293 	const struct got_error *err = NULL;
294 	err = got_object_cache_add(&repo->commitcache, id, commit);
295 	if (err) {
296 		if (err->code == GOT_ERR_OBJ_EXISTS ||
297 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
298 			err = NULL;
299 		return err;
300 	}
301 	commit->refcnt++;
302 #endif
303 	return NULL;
304 }
305 
306 struct got_commit_object *
307 got_repo_get_cached_commit(struct got_repository *repo,
308     struct got_object_id *id)
309 {
310 	return (struct got_commit_object *)got_object_cache_get(
311 	    &repo->commitcache, id);
312 }
313 
314 const struct got_error *
315 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
316     struct got_tag_object *tag)
317 {
318 #ifndef GOT_NO_OBJ_CACHE
319 	const struct got_error *err = NULL;
320 	err = got_object_cache_add(&repo->tagcache, id, tag);
321 	if (err) {
322 		if (err->code == GOT_ERR_OBJ_EXISTS ||
323 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
324 			err = NULL;
325 		return err;
326 	}
327 	tag->refcnt++;
328 #endif
329 	return NULL;
330 }
331 
332 struct got_tag_object *
333 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
334 {
335 	return (struct got_tag_object *)got_object_cache_get(
336 	    &repo->tagcache, id);
337 }
338 
339 const struct got_error *
340 open_repo(struct got_repository *repo, const char *path)
341 {
342 	const struct got_error *err = NULL;
343 
344 	/* bare git repository? */
345 	repo->path_git_dir = strdup(path);
346 	if (repo->path_git_dir == NULL)
347 		return got_error_from_errno("strdup");
348 	if (is_git_repo(repo)) {
349 		repo->path = strdup(repo->path_git_dir);
350 		if (repo->path == NULL) {
351 			err = got_error_from_errno("strdup");
352 			goto done;
353 		}
354 		return NULL;
355 	}
356 
357 	/* git repository with working tree? */
358 	free(repo->path_git_dir);
359 	repo->path_git_dir = NULL;
360 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
361 		err = got_error_from_errno("asprintf");
362 		goto done;
363 	}
364 	if (is_git_repo(repo)) {
365 		repo->path = strdup(path);
366 		if (repo->path == NULL) {
367 			err = got_error_from_errno("strdup");
368 			goto done;
369 		}
370 		return NULL;
371 	}
372 
373 	err = got_error(GOT_ERR_NOT_GIT_REPO);
374 done:
375 	if (err) {
376 		free(repo->path);
377 		repo->path = NULL;
378 		free(repo->path_git_dir);
379 		repo->path_git_dir = NULL;
380 	}
381 	return err;
382 }
383 
384 static const struct got_error *
385 parse_gitconfig_file(int *gitconfig_repository_format_version,
386     char **gitconfig_author_name, char **gitconfig_author_email,
387     struct got_remote_repo **remotes, int *nremotes,
388     char **gitconfig_owner,
389     const char *gitconfig_path)
390 {
391 	const struct got_error *err = NULL, *child_err = NULL;
392 	int fd = -1;
393 	int imsg_fds[2] = { -1, -1 };
394 	pid_t pid;
395 	struct imsgbuf *ibuf;
396 
397 	*gitconfig_repository_format_version = 0;
398 	*gitconfig_author_name = NULL;
399 	*gitconfig_author_email = NULL;
400 	if (remotes)
401 		*remotes = NULL;
402 	if (nremotes)
403 		*nremotes = 0;
404 	if (gitconfig_owner)
405 		*gitconfig_owner = NULL;
406 
407 	fd = open(gitconfig_path, O_RDONLY);
408 	if (fd == -1) {
409 		if (errno == ENOENT)
410 			return NULL;
411 		return got_error_from_errno2("open", gitconfig_path);
412 	}
413 
414 	ibuf = calloc(1, sizeof(*ibuf));
415 	if (ibuf == NULL) {
416 		err = got_error_from_errno("calloc");
417 		goto done;
418 	}
419 
420 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
421 		err = got_error_from_errno("socketpair");
422 		goto done;
423 	}
424 
425 	pid = fork();
426 	if (pid == -1) {
427 		err = got_error_from_errno("fork");
428 		goto done;
429 	} else if (pid == 0) {
430 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
431 		    gitconfig_path);
432 		/* not reached */
433 	}
434 
435 	if (close(imsg_fds[1]) == -1) {
436 		err = got_error_from_errno("close");
437 		goto done;
438 	}
439 	imsg_fds[1] = -1;
440 	imsg_init(ibuf, imsg_fds[0]);
441 
442 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
443 	if (err)
444 		goto done;
445 	fd = -1;
446 
447 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
448 	if (err)
449 		goto done;
450 
451 	err = got_privsep_recv_gitconfig_int(
452 	    gitconfig_repository_format_version, ibuf);
453 	if (err)
454 		goto done;
455 
456 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
457 	if (err)
458 		goto done;
459 
460 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
461 	if (err)
462 		goto done;
463 
464 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
465 	if (err)
466 		goto done;
467 
468 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
469 	if (err)
470 		goto done;
471 
472 	if (remotes && nremotes) {
473 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
474 		if (err)
475 			goto done;
476 
477 		err = got_privsep_recv_gitconfig_remotes(remotes,
478 		    nremotes, ibuf);
479 		if (err)
480 			goto done;
481 	}
482 
483 	if (gitconfig_owner) {
484 		err = got_privsep_send_gitconfig_owner_req(ibuf);
485 		if (err)
486 			goto done;
487 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
488 		if (err)
489 			goto done;
490 	}
491 
492 	imsg_clear(ibuf);
493 	err = got_privsep_send_stop(imsg_fds[0]);
494 	child_err = got_privsep_wait_for_child(pid);
495 	if (child_err && err == NULL)
496 		err = child_err;
497 done:
498 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
499 		err = got_error_from_errno("close");
500 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
501 		err = got_error_from_errno("close");
502 	if (fd != -1 && close(fd) == -1 && err == NULL)
503 		err = got_error_from_errno2("close", gitconfig_path);
504 	free(ibuf);
505 	return err;
506 }
507 
508 static const struct got_error *
509 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
510 {
511 	const struct got_error *err = NULL;
512 	char *repo_gitconfig_path = NULL;
513 
514 	if (global_gitconfig_path) {
515 		/* Read settings from ~/.gitconfig. */
516 		int dummy_repo_version;
517 		err = parse_gitconfig_file(&dummy_repo_version,
518 		    &repo->global_gitconfig_author_name,
519 		    &repo->global_gitconfig_author_email,
520 		    NULL, NULL, NULL, global_gitconfig_path);
521 		if (err)
522 			return err;
523 	}
524 
525 	/* Read repository's .git/config file. */
526 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
527 	if (repo_gitconfig_path == NULL)
528 		return got_error_from_errno("got_repo_get_path_gitconfig");
529 
530 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
531 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
532 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
533 	    &repo->gitconfig_owner, repo_gitconfig_path);
534 	if (err)
535 		goto done;
536 done:
537 	free(repo_gitconfig_path);
538 	return err;
539 }
540 
541 static const struct got_error *
542 parse_gotconfig_file(char **author,
543     struct got_remote_repo **remotes, int *nremotes,
544     const char *gotconfig_path)
545 {
546 	const struct got_error *err = NULL, *child_err = NULL;
547 	int fd = -1;
548 	int imsg_fds[2] = { -1, -1 };
549 	pid_t pid;
550 	struct imsgbuf *ibuf;
551 
552 	if (author)
553 		*author = NULL;
554 	if (remotes)
555 		*remotes = NULL;
556 	if (nremotes)
557 		*nremotes = 0;
558 
559 	fd = open(gotconfig_path, O_RDONLY);
560 	if (fd == -1) {
561 		if (errno == ENOENT)
562 			return NULL;
563 		return got_error_from_errno2("open", gotconfig_path);
564 	}
565 
566 	ibuf = calloc(1, sizeof(*ibuf));
567 	if (ibuf == NULL) {
568 		err = got_error_from_errno("calloc");
569 		goto done;
570 	}
571 
572 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
573 		err = got_error_from_errno("socketpair");
574 		goto done;
575 	}
576 
577 	pid = fork();
578 	if (pid == -1) {
579 		err = got_error_from_errno("fork");
580 		goto done;
581 	} else if (pid == 0) {
582 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GOTCONFIG,
583 		    gotconfig_path);
584 		/* not reached */
585 	}
586 
587 	if (close(imsg_fds[1]) == -1) {
588 		err = got_error_from_errno("close");
589 		goto done;
590 	}
591 	imsg_fds[1] = -1;
592 	imsg_init(ibuf, imsg_fds[0]);
593 
594 	err = got_privsep_send_gotconfig_parse_req(ibuf, fd);
595 	if (err)
596 		goto done;
597 	fd = -1;
598 
599 	if (author) {
600 		err = got_privsep_send_gotconfig_author_req(ibuf);
601 		if (err)
602 			goto done;
603 
604 		err = got_privsep_recv_gotconfig_str(author, ibuf);
605 		if (err)
606 			goto done;
607 	}
608 
609 	if (remotes && nremotes) {
610 		err = got_privsep_send_gotconfig_remotes_req(ibuf);
611 		if (err)
612 			goto done;
613 
614 		err = got_privsep_recv_gotconfig_remotes(remotes,
615 		    nremotes, ibuf);
616 		if (err)
617 			goto done;
618 	}
619 
620 	imsg_clear(ibuf);
621 	err = got_privsep_send_stop(imsg_fds[0]);
622 	child_err = got_privsep_wait_for_child(pid);
623 	if (child_err && err == NULL)
624 		err = child_err;
625 done:
626 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
627 		err = got_error_from_errno("close");
628 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
629 		err = got_error_from_errno("close");
630 	if (fd != -1 && close(fd) == -1 && err == NULL)
631 		err = got_error_from_errno2("close", gotconfig_path);
632 	if (err) {
633 		if (author) {
634 			free(*author);
635 			*author = NULL;
636 		}
637 	}
638 	free(ibuf);
639 	return err;
640 }
641 
642 static const struct got_error *
643 read_gotconfig(struct got_repository *repo)
644 {
645 	const struct got_error *err = NULL;
646 	char *gotconfig_path;
647 
648 	gotconfig_path = got_repo_get_path_gotconfig(repo);
649 	if (gotconfig_path == NULL)
650 		return got_error_from_errno("got_repo_get_path_gotconfig");
651 
652 	err = parse_gotconfig_file(&repo->gotconfig_author,
653 	    &repo->gotconfig_remotes, &repo->ngotconfig_remotes,
654 	    gotconfig_path);
655 	free(gotconfig_path);
656 	return err;
657 }
658 
659 const struct got_error *
660 got_repo_open(struct got_repository **repop, const char *path,
661     const char *global_gitconfig_path)
662 {
663 	struct got_repository *repo = NULL;
664 	const struct got_error *err = NULL;
665 	char *abspath;
666 	int i, tried_root = 0;
667 
668 	*repop = NULL;
669 
670 	if (got_path_is_absolute(path))
671 		abspath = strdup(path);
672 	else
673 		abspath = got_path_get_absolute(path);
674 	if (abspath == NULL)
675 		return got_error_path(path, GOT_ERR_BAD_PATH);
676 
677 	repo = calloc(1, sizeof(*repo));
678 	if (repo == NULL) {
679 		err = got_error_from_errno("calloc");
680 		goto done;
681 	}
682 
683 	for (i = 0; i < nitems(repo->privsep_children); i++) {
684 		memset(&repo->privsep_children[i], 0,
685 		    sizeof(repo->privsep_children[0]));
686 		repo->privsep_children[i].imsg_fd = -1;
687 	}
688 
689 	err = got_object_cache_init(&repo->objcache,
690 	    GOT_OBJECT_CACHE_TYPE_OBJ);
691 	if (err)
692 		goto done;
693 	err = got_object_cache_init(&repo->treecache,
694 	    GOT_OBJECT_CACHE_TYPE_TREE);
695 	if (err)
696 		goto done;
697 	err = got_object_cache_init(&repo->commitcache,
698 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
699 	if (err)
700 		goto done;
701 	err = got_object_cache_init(&repo->tagcache,
702 	    GOT_OBJECT_CACHE_TYPE_TAG);
703 	if (err)
704 		goto done;
705 
706 	path = realpath(abspath, NULL);
707 	if (path == NULL) {
708 		err = got_error_from_errno2("realpath", abspath);
709 		goto done;
710 	}
711 
712 	do {
713 		err = open_repo(repo, path);
714 		if (err == NULL)
715 			break;
716 		if (err->code != GOT_ERR_NOT_GIT_REPO)
717 			break;
718 		if (path[0] == '/' && path[1] == '\0') {
719 			if (tried_root) {
720 				err = got_error(GOT_ERR_NOT_GIT_REPO);
721 				goto done;
722 			}
723 			tried_root = 1;
724 		}
725 		path = dirname(path);
726 		if (path == NULL) {
727 			err = got_error_from_errno2("dirname", path);
728 			goto done;
729 		}
730 	} while (path);
731 
732 	err = read_gotconfig(repo);
733 	if (err)
734 		goto done;
735 
736 	err = read_gitconfig(repo, global_gitconfig_path);
737 	if (err)
738 		goto done;
739 	if (repo->gitconfig_repository_format_version != 0)
740 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
741 done:
742 	if (err)
743 		got_repo_close(repo);
744 	else
745 		*repop = repo;
746 	free(abspath);
747 	return err;
748 }
749 
750 const struct got_error *
751 got_repo_close(struct got_repository *repo)
752 {
753 	const struct got_error *err = NULL, *child_err;
754 	int i;
755 
756 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
757 		if (repo->packidx_cache[i] == NULL)
758 			break;
759 		got_packidx_close(repo->packidx_cache[i]);
760 	}
761 
762 	for (i = 0; i < nitems(repo->packs); i++) {
763 		if (repo->packs[i].path_packfile == NULL)
764 			break;
765 		got_pack_close(&repo->packs[i]);
766 	}
767 
768 	free(repo->path);
769 	free(repo->path_git_dir);
770 
771 	got_object_cache_close(&repo->objcache);
772 	got_object_cache_close(&repo->treecache);
773 	got_object_cache_close(&repo->commitcache);
774 	got_object_cache_close(&repo->tagcache);
775 
776 	for (i = 0; i < nitems(repo->privsep_children); i++) {
777 		if (repo->privsep_children[i].imsg_fd == -1)
778 			continue;
779 		imsg_clear(repo->privsep_children[i].ibuf);
780 		free(repo->privsep_children[i].ibuf);
781 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
782 		child_err = got_privsep_wait_for_child(
783 		    repo->privsep_children[i].pid);
784 		if (child_err && err == NULL)
785 			err = child_err;
786 		if (close(repo->privsep_children[i].imsg_fd) != 0 &&
787 		    err == NULL)
788 			err = got_error_from_errno("close");
789 	}
790 
791 	free(repo->gotconfig_author);
792 	for (i = 0; i < repo->ngotconfig_remotes; i++) {
793 		free(repo->gotconfig_remotes[i].name);
794 		free(repo->gotconfig_remotes[i].url);
795 	}
796 	free(repo->gotconfig_remotes);
797 	free(repo->gitconfig_author_name);
798 	free(repo->gitconfig_author_email);
799 	for (i = 0; i < repo->ngitconfig_remotes; i++) {
800 		free(repo->gitconfig_remotes[i].name);
801 		free(repo->gitconfig_remotes[i].url);
802 	}
803 	free(repo->gitconfig_remotes);
804 	free(repo);
805 
806 	return err;
807 }
808 
809 const struct got_error *
810 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
811     const char *input_path, int check_disk)
812 {
813 	const struct got_error *err = NULL;
814 	const char *repo_abspath = NULL;
815 	size_t repolen, len;
816 	char *canonpath, *path = NULL;
817 
818 	*in_repo_path = NULL;
819 
820 	canonpath = strdup(input_path);
821 	if (canonpath == NULL) {
822 		err = got_error_from_errno("strdup");
823 		goto done;
824 	}
825 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
826 	if (err)
827 		goto done;
828 
829 	repo_abspath = got_repo_get_path(repo);
830 
831 	if (!check_disk || canonpath[0] == '\0') {
832 		path = strdup(canonpath);
833 		if (path == NULL) {
834 			err = got_error_from_errno("strdup");
835 			goto done;
836 		}
837 	} else {
838 		path = realpath(canonpath, NULL);
839 		if (path == NULL) {
840 			if (errno != ENOENT) {
841 				err = got_error_from_errno2("realpath",
842 				    canonpath);
843 				goto done;
844 			}
845 			/*
846 			 * Path is not on disk.
847 			 * Assume it is already relative to repository root.
848 			 */
849 			path = strdup(canonpath);
850 			if (path == NULL) {
851 				err = got_error_from_errno("strdup");
852 				goto done;
853 			}
854 		}
855 
856 		repolen = strlen(repo_abspath);
857 		len = strlen(path);
858 
859 
860 		if (strcmp(path, repo_abspath) == 0) {
861 			free(path);
862 			path = strdup("");
863 			if (path == NULL) {
864 				err = got_error_from_errno("strdup");
865 				goto done;
866 			}
867 		} else if (len > repolen &&
868 		    got_path_is_child(path, repo_abspath, repolen)) {
869 			/* Matched an on-disk path inside repository. */
870 			if (got_repo_is_bare(repo)) {
871 				/*
872 				 * Matched an on-disk path inside repository
873 				 * database. Treat as repository-relative.
874 				 */
875 			} else {
876 				char *child;
877 				/* Strip common prefix with repository path. */
878 				err = got_path_skip_common_ancestor(&child,
879 				    repo_abspath, path);
880 				if (err)
881 					goto done;
882 				free(path);
883 				path = child;
884 			}
885 		} else {
886 			/*
887 			 * Matched unrelated on-disk path.
888 			 * Treat it as repository-relative.
889 			 */
890 		}
891 	}
892 
893 	/* Make in-repository path absolute */
894 	if (path[0] != '/') {
895 		char *abspath;
896 		if (asprintf(&abspath, "/%s", path) == -1) {
897 			err = got_error_from_errno("asprintf");
898 			goto done;
899 		}
900 		free(path);
901 		path = abspath;
902 	}
903 
904 done:
905 	free(canonpath);
906 	if (err)
907 		free(path);
908 	else
909 		*in_repo_path = path;
910 	return err;
911 }
912 
913 static const struct got_error *
914 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
915     const char *path_packidx)
916 {
917 	const struct got_error *err = NULL;
918 	int i;
919 
920 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
921 		if (repo->packidx_cache[i] == NULL)
922 			break;
923 		if (strcmp(repo->packidx_cache[i]->path_packidx,
924 		    path_packidx) == 0) {
925 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
926 		}
927 	}
928 	if (i == nitems(repo->packidx_cache)) {
929 		err = got_packidx_close(repo->packidx_cache[i - 1]);
930 		if (err)
931 			return err;
932 	}
933 
934 	/*
935 	 * Insert the new pack index at the front so it will
936 	 * be searched first in the future.
937 	 */
938 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
939 	    sizeof(repo->packidx_cache) -
940 	    sizeof(repo->packidx_cache[0]));
941 	repo->packidx_cache[0] = packidx;
942 
943 	return NULL;
944 }
945 
946 static int
947 is_packidx_filename(const char *name, size_t len)
948 {
949 	if (len != GOT_PACKIDX_NAMELEN)
950 		return 0;
951 
952 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
953 		return 0;
954 
955 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
956 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
957 		return 0;
958 
959 	return 1;
960 }
961 
962 const struct got_error *
963 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
964     struct got_repository *repo, struct got_object_id *id)
965 {
966 	const struct got_error *err;
967 	char *path_packdir;
968 	DIR *packdir;
969 	struct dirent *dent;
970 	char *path_packidx;
971 	int i;
972 
973 	/* Search pack index cache. */
974 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
975 		if (repo->packidx_cache[i] == NULL)
976 			break;
977 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
978 		if (*idx != -1) {
979 			*packidx = repo->packidx_cache[i];
980 			/*
981 			 * Move this cache entry to the front. Repeatedly
982 			 * searching a wrong pack index can be expensive.
983 			 */
984 			if (i > 0) {
985 				struct got_packidx *p;
986 				p = repo->packidx_cache[0];
987 				repo->packidx_cache[0] = *packidx;
988 				repo->packidx_cache[i] = p;
989 			}
990 			return NULL;
991 		}
992 	}
993 	/* No luck. Search the filesystem. */
994 
995 	path_packdir = got_repo_get_path_objects_pack(repo);
996 	if (path_packdir == NULL)
997 		return got_error_from_errno("got_repo_get_path_objects_pack");
998 
999 	packdir = opendir(path_packdir);
1000 	if (packdir == NULL) {
1001 		if (errno == ENOENT)
1002 			err = got_error_no_obj(id);
1003 		else
1004 			err = got_error_from_errno2("opendir", path_packdir);
1005 		goto done;
1006 	}
1007 
1008 	while ((dent = readdir(packdir)) != NULL) {
1009 		int is_cached = 0;
1010 
1011 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1012 			continue;
1013 
1014 		if (asprintf(&path_packidx, "%s/%s", path_packdir,
1015 		    dent->d_name) == -1) {
1016 			err = got_error_from_errno("asprintf");
1017 			goto done;
1018 		}
1019 
1020 		for (i = 0; i < nitems(repo->packidx_cache); i++) {
1021 			if (repo->packidx_cache[i] == NULL)
1022 				break;
1023 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1024 			    path_packidx) == 0) {
1025 				is_cached = 1;
1026 				break;
1027 			}
1028 		}
1029 		if (is_cached) {
1030 			free(path_packidx);
1031 			continue; /* already searched */
1032 		}
1033 
1034 		err = got_packidx_open(packidx, path_packidx, 0);
1035 		if (err) {
1036 			free(path_packidx);
1037 			goto done;
1038 		}
1039 
1040 		err = cache_packidx(repo, *packidx, path_packidx);
1041 		free(path_packidx);
1042 		if (err)
1043 			goto done;
1044 
1045 		*idx = got_packidx_get_object_idx(*packidx, id);
1046 		if (*idx != -1) {
1047 			err = NULL; /* found the object */
1048 			goto done;
1049 		}
1050 	}
1051 
1052 	err = got_error_no_obj(id);
1053 done:
1054 	free(path_packdir);
1055 	if (packdir && closedir(packdir) != 0 && err == NULL)
1056 		err = got_error_from_errno("closedir");
1057 	return err;
1058 }
1059 
1060 static const struct got_error *
1061 read_packfile_hdr(int fd, struct got_packidx *packidx)
1062 {
1063 	const struct got_error *err = NULL;
1064 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1065 	struct got_packfile_hdr hdr;
1066 	ssize_t n;
1067 
1068 	n = read(fd, &hdr, sizeof(hdr));
1069 	if (n < 0)
1070 		return got_error_from_errno("read");
1071 	if (n != sizeof(hdr))
1072 		return got_error(GOT_ERR_BAD_PACKFILE);
1073 
1074 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1075 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1076 	    be32toh(hdr.nobjects) != totobj)
1077 		err = got_error(GOT_ERR_BAD_PACKFILE);
1078 
1079 	return err;
1080 }
1081 
1082 static const struct got_error *
1083 open_packfile(int *fd, const char *path_packfile, struct got_packidx *packidx)
1084 {
1085 	const struct got_error *err = NULL;
1086 
1087 	*fd = open(path_packfile, O_RDONLY | O_NOFOLLOW);
1088 	if (*fd == -1)
1089 		return got_error_from_errno2("open", path_packfile);
1090 
1091 	if (packidx) {
1092 		err = read_packfile_hdr(*fd, packidx);
1093 		if (err) {
1094 			close(*fd);
1095 			*fd = -1;
1096 		}
1097 	}
1098 
1099 	return err;
1100 }
1101 
1102 const struct got_error *
1103 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1104     const char *path_packfile, struct got_packidx *packidx)
1105 {
1106 	const struct got_error *err = NULL;
1107 	struct got_pack *pack = NULL;
1108 	struct stat sb;
1109 	int i;
1110 
1111 	if (packp)
1112 		*packp = NULL;
1113 
1114 	for (i = 0; i < nitems(repo->packs); i++) {
1115 		pack = &repo->packs[i];
1116 		if (pack->path_packfile == NULL)
1117 			break;
1118 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1119 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1120 	}
1121 
1122 	if (i == nitems(repo->packs) - 1) {
1123 		err = got_pack_close(&repo->packs[i - 1]);
1124 		if (err)
1125 			return err;
1126 		memmove(&repo->packs[1], &repo->packs[0],
1127 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1128 		i = 0;
1129 	}
1130 
1131 	pack = &repo->packs[i];
1132 
1133 	pack->path_packfile = strdup(path_packfile);
1134 	if (pack->path_packfile == NULL) {
1135 		err = got_error_from_errno("strdup");
1136 		goto done;
1137 	}
1138 
1139 	err = open_packfile(&pack->fd, path_packfile, packidx);
1140 	if (err)
1141 		goto done;
1142 
1143 	if (fstat(pack->fd, &sb) != 0) {
1144 		err = got_error_from_errno("fstat");
1145 		goto done;
1146 	}
1147 	pack->filesize = sb.st_size;
1148 
1149 	pack->privsep_child = NULL;
1150 
1151 #ifndef GOT_PACK_NO_MMAP
1152 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1153 	    pack->fd, 0);
1154 	if (pack->map == MAP_FAILED) {
1155 		if (errno != ENOMEM) {
1156 			err = got_error_from_errno("mmap");
1157 			goto done;
1158 		}
1159 		pack->map = NULL; /* fall back to read(2) */
1160 	}
1161 #endif
1162 done:
1163 	if (err) {
1164 		if (pack) {
1165 			free(pack->path_packfile);
1166 			memset(pack, 0, sizeof(*pack));
1167 		}
1168 	} else if (packp)
1169 		*packp = pack;
1170 	return err;
1171 }
1172 
1173 struct got_pack *
1174 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1175 {
1176 	struct got_pack *pack = NULL;
1177 	int i;
1178 
1179 	for (i = 0; i < nitems(repo->packs); i++) {
1180 		pack = &repo->packs[i];
1181 		if (pack->path_packfile == NULL)
1182 			break;
1183 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1184 			return pack;
1185 	}
1186 
1187 	return NULL;
1188 }
1189 
1190 const struct got_error *
1191 got_repo_init(const char *repo_path)
1192 {
1193 	const struct got_error *err = NULL;
1194 	const char *dirnames[] = {
1195 		GOT_OBJECTS_DIR,
1196 		GOT_OBJECTS_PACK_DIR,
1197 		GOT_REFS_DIR,
1198 	};
1199 	const char *description_str = "Unnamed repository; "
1200 	    "edit this file 'description' to name the repository.";
1201 	const char *headref_str = "ref: refs/heads/main";
1202 	const char *gitconfig_str = "[core]\n"
1203 	    "\trepositoryformatversion = 0\n"
1204 	    "\tfilemode = true\n"
1205 	    "\tbare = true\n";
1206 	char *path;
1207 	int i;
1208 
1209 	if (!got_path_dir_is_empty(repo_path))
1210 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1211 
1212 	for (i = 0; i < nitems(dirnames); i++) {
1213 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1214 			return got_error_from_errno("asprintf");
1215 		}
1216 		err = got_path_mkdir(path);
1217 		free(path);
1218 		if (err)
1219 			return err;
1220 	}
1221 
1222 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1223 		return got_error_from_errno("asprintf");
1224 	err = got_path_create_file(path, description_str);
1225 	free(path);
1226 	if (err)
1227 		return err;
1228 
1229 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1230 		return got_error_from_errno("asprintf");
1231 	err = got_path_create_file(path, headref_str);
1232 	free(path);
1233 	if (err)
1234 		return err;
1235 
1236 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1237 		return got_error_from_errno("asprintf");
1238 	err = got_path_create_file(path, gitconfig_str);
1239 	free(path);
1240 	if (err)
1241 		return err;
1242 
1243 	return NULL;
1244 }
1245 
1246 static const struct got_error *
1247 match_packed_object(struct got_object_id **unique_id,
1248     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1249 {
1250 	const struct got_error *err = NULL;
1251 	char *path_packdir;
1252 	DIR *packdir;
1253 	struct dirent *dent;
1254 	char *path_packidx;
1255 	struct got_object_id_queue matched_ids;
1256 
1257 	SIMPLEQ_INIT(&matched_ids);
1258 
1259 	path_packdir = got_repo_get_path_objects_pack(repo);
1260 	if (path_packdir == NULL)
1261 		return got_error_from_errno("got_repo_get_path_objects_pack");
1262 
1263 	packdir = opendir(path_packdir);
1264 	if (packdir == NULL) {
1265 		if (errno != ENOENT)
1266 			err = got_error_from_errno2("opendir", path_packdir);
1267 		goto done;
1268 	}
1269 
1270 	while ((dent = readdir(packdir)) != NULL) {
1271 		struct got_packidx *packidx;
1272 		struct got_object_qid *qid;
1273 
1274 
1275 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1276 			continue;
1277 
1278 		if (asprintf(&path_packidx, "%s/%s", path_packdir,
1279 		    dent->d_name) == -1) {
1280 			err = got_error_from_errno("asprintf");
1281 			break;
1282 		}
1283 
1284 		err = got_packidx_open(&packidx, path_packidx, 0);
1285 		free(path_packidx);
1286 		if (err)
1287 			break;
1288 
1289 		err = got_packidx_match_id_str_prefix(&matched_ids,
1290 		    packidx, id_str_prefix);
1291 		if (err) {
1292 			got_packidx_close(packidx);
1293 			break;
1294 		}
1295 		err = got_packidx_close(packidx);
1296 		if (err)
1297 			break;
1298 
1299 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1300 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1301 				int matched_type;
1302 				err = got_object_get_type(&matched_type, repo,
1303 				    qid->id);
1304 				if (err)
1305 					goto done;
1306 				if (matched_type != obj_type)
1307 					continue;
1308 			}
1309 			if (*unique_id == NULL) {
1310 				*unique_id = got_object_id_dup(qid->id);
1311 				if (*unique_id == NULL) {
1312 					err = got_error_from_errno("malloc");
1313 					goto done;
1314 				}
1315 			} else {
1316 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1317 					continue; /* packed multiple times */
1318 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1319 				goto done;
1320 			}
1321 		}
1322 	}
1323 done:
1324 	got_object_id_queue_free(&matched_ids);
1325 	free(path_packdir);
1326 	if (packdir && closedir(packdir) != 0 && err == NULL)
1327 		err = got_error_from_errno("closedir");
1328 	if (err) {
1329 		free(*unique_id);
1330 		*unique_id = NULL;
1331 	}
1332 	return err;
1333 }
1334 
1335 static const struct got_error *
1336 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1337     const char *object_dir, const char *id_str_prefix, int obj_type,
1338     struct got_repository *repo)
1339 {
1340 	const struct got_error *err = NULL;
1341 	char *path;
1342 	DIR *dir = NULL;
1343 	struct dirent *dent;
1344 	struct got_object_id id;
1345 
1346 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1347 		err = got_error_from_errno("asprintf");
1348 		goto done;
1349 	}
1350 
1351 	dir = opendir(path);
1352 	if (dir == NULL) {
1353 		if (errno == ENOENT) {
1354 			err = NULL;
1355 			goto done;
1356 		}
1357 		err = got_error_from_errno2("opendir", path);
1358 		goto done;
1359 	}
1360 	while ((dent = readdir(dir)) != NULL) {
1361 		char *id_str;
1362 		int cmp;
1363 
1364 		if (strcmp(dent->d_name, ".") == 0 ||
1365 		    strcmp(dent->d_name, "..") == 0)
1366 			continue;
1367 
1368 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1369 			err = got_error_from_errno("asprintf");
1370 			goto done;
1371 		}
1372 
1373 		if (!got_parse_sha1_digest(id.sha1, id_str))
1374 			continue;
1375 
1376 		/*
1377 		 * Directory entries do not necessarily appear in
1378 		 * sorted order, so we must iterate over all of them.
1379 		 */
1380 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1381 		if (cmp != 0) {
1382 			free(id_str);
1383 			continue;
1384 		}
1385 
1386 		if (*unique_id == NULL) {
1387 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1388 				int matched_type;
1389 				err = got_object_get_type(&matched_type, repo,
1390 				    &id);
1391 				if (err)
1392 					goto done;
1393 				if (matched_type != obj_type)
1394 					continue;
1395 			}
1396 			*unique_id = got_object_id_dup(&id);
1397 			if (*unique_id == NULL) {
1398 				err = got_error_from_errno("got_object_id_dup");
1399 				free(id_str);
1400 				goto done;
1401 			}
1402 		} else {
1403 			if (got_object_id_cmp(*unique_id, &id) == 0)
1404 				continue; /* both packed and loose */
1405 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1406 			free(id_str);
1407 			goto done;
1408 		}
1409 	}
1410 done:
1411 	if (dir && closedir(dir) != 0 && err == NULL)
1412 		err = got_error_from_errno("closedir");
1413 	if (err) {
1414 		free(*unique_id);
1415 		*unique_id = NULL;
1416 	}
1417 	free(path);
1418 	return err;
1419 }
1420 
1421 const struct got_error *
1422 got_repo_match_object_id_prefix(struct got_object_id **id,
1423     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1424 {
1425 	const struct got_error *err = NULL;
1426 	char *path_objects = got_repo_get_path_objects(repo);
1427 	char *object_dir = NULL;
1428 	size_t len;
1429 	int i;
1430 
1431 	*id = NULL;
1432 
1433 	for (i = 0; i < strlen(id_str_prefix); i++) {
1434 		if (isxdigit((unsigned char)id_str_prefix[i]))
1435 			continue;
1436 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1437 	}
1438 
1439 	len = strlen(id_str_prefix);
1440 	if (len >= 2) {
1441 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1442 		if (err)
1443 			goto done;
1444 		object_dir = strndup(id_str_prefix, 2);
1445 		if (object_dir == NULL) {
1446 			err = got_error_from_errno("strdup");
1447 			goto done;
1448 		}
1449 		err = match_loose_object(id, path_objects, object_dir,
1450 		    id_str_prefix, obj_type, repo);
1451 	} else if (len == 1) {
1452 		int i;
1453 		for (i = 0; i < 0xf; i++) {
1454 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1455 			    == -1) {
1456 				err = got_error_from_errno("asprintf");
1457 				goto done;
1458 			}
1459 			err = match_packed_object(id, repo, object_dir,
1460 			    obj_type);
1461 			if (err)
1462 				goto done;
1463 			err = match_loose_object(id, path_objects, object_dir,
1464 			    id_str_prefix, obj_type, repo);
1465 			if (err)
1466 				goto done;
1467 		}
1468 	} else {
1469 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1470 		goto done;
1471 	}
1472 done:
1473 	free(object_dir);
1474 	if (err) {
1475 		free(*id);
1476 		*id = NULL;
1477 	} else if (*id == NULL)
1478 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1479 
1480 	return err;
1481 }
1482 
1483 const struct got_error *
1484 got_repo_match_object_id(struct got_object_id **id, char **label,
1485     const char *id_str, int obj_type, int resolve_tags,
1486     struct got_repository *repo)
1487 {
1488 	const struct got_error *err;
1489 	struct got_tag_object *tag;
1490 	struct got_reference *ref = NULL;
1491 
1492 	*id = NULL;
1493 	if (label)
1494 		*label = NULL;
1495 
1496 	if (resolve_tags) {
1497 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1498 		    repo);
1499 		if (err == NULL) {
1500 			*id = got_object_id_dup(
1501 			    got_object_tag_get_object_id(tag));
1502 			if (*id == NULL)
1503 				err = got_error_from_errno("got_object_id_dup");
1504 			else if (label && asprintf(label, "refs/tags/%s",
1505 			    got_object_tag_get_name(tag)) == -1) {
1506 				err = got_error_from_errno("asprintf");
1507 				free(*id);
1508 				*id = NULL;
1509 			}
1510 			got_object_tag_close(tag);
1511 			return err;
1512 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1513 		    err->code != GOT_ERR_NO_OBJ)
1514 			return err;
1515 	}
1516 
1517 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1518 	if (err) {
1519 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1520 			return err;
1521 		err = got_ref_open(&ref, repo, id_str, 0);
1522 		if (err != NULL)
1523 			goto done;
1524 		if (label) {
1525 			*label = strdup(got_ref_get_name(ref));
1526 			if (*label == NULL) {
1527 				err = got_error_from_errno("strdup");
1528 				goto done;
1529 			}
1530 		}
1531 		err = got_ref_resolve(id, repo, ref);
1532 	} else if (label) {
1533 		err = got_object_id_str(label, *id);
1534 		if (*label == NULL) {
1535 			err = got_error_from_errno("strdup");
1536 			goto done;
1537 		}
1538 	}
1539 done:
1540 	if (ref)
1541 		got_ref_close(ref);
1542 	return err;
1543 }
1544 
1545 const struct got_error *
1546 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1547     int obj_type, struct got_repository *repo)
1548 {
1549 	const struct got_error *err;
1550 	struct got_reflist_head refs;
1551 	struct got_reflist_entry *re;
1552 	struct got_object_id *tag_id;
1553 
1554 	SIMPLEQ_INIT(&refs);
1555 	*tag = NULL;
1556 
1557 	err = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_by_name, NULL);
1558 	if (err)
1559 		return err;
1560 
1561 	SIMPLEQ_FOREACH(re, &refs, entry) {
1562 		const char *refname;
1563 		refname = got_ref_get_name(re->ref);
1564 		if (got_ref_is_symbolic(re->ref))
1565 			continue;
1566 		refname += strlen("refs/tags/");
1567 		if (strcmp(refname, name) != 0)
1568 			continue;
1569 		err = got_ref_resolve(&tag_id, repo, re->ref);
1570 		if (err)
1571 			break;
1572 		err = got_object_open_as_tag(tag, repo, tag_id);
1573 		free(tag_id);
1574 		if (err)
1575 			break;
1576 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1577 		    got_object_tag_get_object_type(*tag) == obj_type)
1578 			break;
1579 		got_object_tag_close(*tag);
1580 		*tag = NULL;
1581 	}
1582 
1583 	got_ref_list_free(&refs);
1584 	if (err == NULL && *tag == NULL)
1585 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1586 	return err;
1587 }
1588 
1589 static const struct got_error *
1590 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1591     const char *name, mode_t mode, struct got_object_id *blob_id)
1592 {
1593 	const struct got_error *err = NULL;
1594 
1595 	 *new_te = NULL;
1596 
1597 	*new_te = calloc(1, sizeof(**new_te));
1598 	if (*new_te == NULL)
1599 		return got_error_from_errno("calloc");
1600 
1601 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1602 	    sizeof((*new_te)->name)) {
1603 		err = got_error(GOT_ERR_NO_SPACE);
1604 		goto done;
1605 	}
1606 
1607 	if (S_ISLNK(mode)) {
1608 		(*new_te)->mode = S_IFLNK;
1609 	} else {
1610 		(*new_te)->mode = S_IFREG;
1611 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1612 	}
1613 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1614 done:
1615 	if (err && *new_te) {
1616 		free(*new_te);
1617 		*new_te = NULL;
1618 	}
1619 	return err;
1620 }
1621 
1622 static const struct got_error *
1623 import_file(struct got_tree_entry **new_te, struct dirent *de,
1624     const char *path, struct got_repository *repo)
1625 {
1626 	const struct got_error *err;
1627 	struct got_object_id *blob_id = NULL;
1628 	char *filepath;
1629 	struct stat sb;
1630 
1631 	if (asprintf(&filepath, "%s%s%s", path,
1632 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1633 		return got_error_from_errno("asprintf");
1634 
1635 	if (lstat(filepath, &sb) != 0) {
1636 		err = got_error_from_errno2("lstat", path);
1637 		goto done;
1638 	}
1639 
1640 	err = got_object_blob_create(&blob_id, filepath, repo);
1641 	if (err)
1642 		goto done;
1643 
1644 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1645 	    blob_id);
1646 done:
1647 	free(filepath);
1648 	if (err)
1649 		free(blob_id);
1650 	return err;
1651 }
1652 
1653 static const struct got_error *
1654 insert_tree_entry(struct got_tree_entry *new_te,
1655     struct got_pathlist_head *paths)
1656 {
1657 	const struct got_error *err = NULL;
1658 	struct got_pathlist_entry *new_pe;
1659 
1660 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1661 	if (err)
1662 		return err;
1663 	if (new_pe == NULL)
1664 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1665 	return NULL;
1666 }
1667 
1668 static const struct got_error *write_tree(struct got_object_id **,
1669     const char *, struct got_pathlist_head *, struct got_repository *,
1670     got_repo_import_cb progress_cb, void *progress_arg);
1671 
1672 static const struct got_error *
1673 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1674     const char *path, struct got_pathlist_head *ignores,
1675     struct got_repository *repo,
1676     got_repo_import_cb progress_cb, void *progress_arg)
1677 {
1678 	const struct got_error *err;
1679 	struct got_object_id *id = NULL;
1680 	char *subdirpath;
1681 
1682 	if (asprintf(&subdirpath, "%s%s%s", path,
1683 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1684 		return got_error_from_errno("asprintf");
1685 
1686 	(*new_te) = calloc(1, sizeof(**new_te));
1687 	if (*new_te == NULL)
1688 		return got_error_from_errno("calloc");
1689 	(*new_te)->mode = S_IFDIR;
1690 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1691 	    sizeof((*new_te)->name)) {
1692 		err = got_error(GOT_ERR_NO_SPACE);
1693 		goto done;
1694 	}
1695 	err = write_tree(&id, subdirpath, ignores,  repo,
1696 	    progress_cb, progress_arg);
1697 	if (err)
1698 		goto done;
1699 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1700 	
1701 done:
1702 	free(id);
1703 	free(subdirpath);
1704 	if (err) {
1705 		free(*new_te);
1706 		*new_te = NULL;
1707 	}
1708 	return err;
1709 }
1710 
1711 static const struct got_error *
1712 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1713     struct got_pathlist_head *ignores, struct got_repository *repo,
1714     got_repo_import_cb progress_cb, void *progress_arg)
1715 {
1716 	const struct got_error *err = NULL;
1717 	DIR *dir;
1718 	struct dirent *de;
1719 	int nentries;
1720 	struct got_tree_entry *new_te = NULL;
1721 	struct got_pathlist_head paths;
1722 	struct got_pathlist_entry *pe;
1723 
1724 	*new_tree_id = NULL;
1725 
1726 	TAILQ_INIT(&paths);
1727 
1728 	dir = opendir(path_dir);
1729 	if (dir == NULL) {
1730 		err = got_error_from_errno2("opendir", path_dir);
1731 		goto done;
1732 	}
1733 
1734 	nentries = 0;
1735 	while ((de = readdir(dir)) != NULL) {
1736 		int ignore = 0;
1737 		int type;
1738 
1739 		if (strcmp(de->d_name, ".") == 0 ||
1740 		    strcmp(de->d_name, "..") == 0)
1741 			continue;
1742 
1743 		TAILQ_FOREACH(pe, ignores, entry) {
1744 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1745 				ignore = 1;
1746 				break;
1747 			}
1748 		}
1749 		if (ignore)
1750 			continue;
1751 
1752 		err = got_path_dirent_type(&type, path_dir, de);
1753 		if (err)
1754 			goto done;
1755 
1756 		if (type == DT_DIR) {
1757 			err = import_subdir(&new_te, de, path_dir,
1758 			    ignores, repo, progress_cb, progress_arg);
1759 			if (err) {
1760 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1761 					goto done;
1762 				err = NULL;
1763 				continue;
1764 			}
1765 		} else if (type == DT_REG || type == DT_LNK) {
1766 			err = import_file(&new_te, de, path_dir, repo);
1767 			if (err)
1768 				goto done;
1769 		} else
1770 			continue;
1771 
1772 		err = insert_tree_entry(new_te, &paths);
1773 		if (err)
1774 			goto done;
1775 		nentries++;
1776 	}
1777 
1778 	if (TAILQ_EMPTY(&paths)) {
1779 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1780 		    "cannot create tree without any entries");
1781 		goto done;
1782 	}
1783 
1784 	TAILQ_FOREACH(pe, &paths, entry) {
1785 		struct got_tree_entry *te = pe->data;
1786 		char *path;
1787 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1788 			continue;
1789 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1790 			err = got_error_from_errno("asprintf");
1791 			goto done;
1792 		}
1793 		err = (*progress_cb)(progress_arg, path);
1794 		free(path);
1795 		if (err)
1796 			goto done;
1797 	}
1798 
1799 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1800 done:
1801 	if (dir)
1802 		closedir(dir);
1803 	got_pathlist_free(&paths);
1804 	return err;
1805 }
1806 
1807 const struct got_error *
1808 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1809     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1810     struct got_repository *repo, got_repo_import_cb progress_cb,
1811     void *progress_arg)
1812 {
1813 	const struct got_error *err;
1814 	struct got_object_id *new_tree_id;
1815 
1816 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1817 	    progress_cb, progress_arg);
1818 	if (err)
1819 		return err;
1820 
1821 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1822 	    author, time(NULL), author, time(NULL), logmsg, repo);
1823 	free(new_tree_id);
1824 	return err;
1825 }