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/uio.h>
19 #include <sys/socket.h>
20 #include <sys/stat.h>
21 #include <sys/mman.h>
22 #include <sys/resource.h>
23 
24 #include <ctype.h>
25 #include <fcntl.h>
26 #include <fnmatch.h>
27 #include <limits.h>
28 #include <dirent.h>
29 #include <stdlib.h>
30 #include <stdio.h>
31 #include <string.h>
32 #include <time.h>
33 #include <unistd.h>
34 #include <zlib.h>
35 #include <errno.h>
36 #include <libgen.h>
37 #include <stdint.h>
38 #include <uuid.h>
39 
40 #include "bloom.h"
41 
42 #include "got_error.h"
43 #include "got_reference.h"
44 #include "got_repository.h"
45 #include "got_path.h"
46 #include "got_cancel.h"
47 #include "got_object.h"
48 
49 #include "got_lib_delta.h"
50 #include "got_lib_inflate.h"
51 #include "got_lib_object.h"
52 #include "got_lib_object_parse.h"
53 #include "got_lib_object_create.h"
54 #include "got_lib_pack.h"
55 #include "got_lib_privsep.h"
56 #include "got_lib_sha1.h"
57 #include "got_lib_object_cache.h"
58 #include "got_lib_repository.h"
59 #include "got_lib_gotconfig.h"
60 
61 #ifndef nitems
62 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
63 #endif
64 
65 RB_PROTOTYPE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
66     got_packidx_bloom_filter_cmp);
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 int
81 got_repo_get_fd(struct got_repository *repo)
82 {
83 	return repo->gitdir_fd;
84 }
85 
86 const char *
87 got_repo_get_gitconfig_author_name(struct got_repository *repo)
88 {
89 	return repo->gitconfig_author_name;
90 }
91 
92 const char *
93 got_repo_get_gitconfig_author_email(struct got_repository *repo)
94 {
95 	return repo->gitconfig_author_email;
96 }
97 
98 const char *
99 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
100 {
101 	return repo->global_gitconfig_author_name;
102 }
103 
104 const char *
105 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
106 {
107 	return repo->global_gitconfig_author_email;
108 }
109 
110 const char *
111 got_repo_get_gitconfig_owner(struct got_repository *repo)
112 {
113 	return repo->gitconfig_owner;
114 }
115 
116 void
117 got_repo_get_gitconfig_extensions(char ***extensions, int *nextensions,
118     struct got_repository *repo)
119 {
120 	*extensions = repo->extensions;
121 	*nextensions = repo->nextensions;
122 }
123 
124 int
125 got_repo_is_bare(struct got_repository *repo)
126 {
127 	return (strcmp(repo->path, repo->path_git_dir) == 0);
128 }
129 
130 static char *
131 get_path_git_child(struct got_repository *repo, const char *basename)
132 {
133 	char *path_child;
134 
135 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
136 	    basename) == -1)
137 		return NULL;
138 
139 	return path_child;
140 }
141 
142 char *
143 got_repo_get_path_objects(struct got_repository *repo)
144 {
145 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
146 }
147 
148 char *
149 got_repo_get_path_objects_pack(struct got_repository *repo)
150 {
151 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
152 }
153 
154 char *
155 got_repo_get_path_refs(struct got_repository *repo)
156 {
157 	return get_path_git_child(repo, GOT_REFS_DIR);
158 }
159 
160 char *
161 got_repo_get_path_packed_refs(struct got_repository *repo)
162 {
163 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
164 }
165 
166 static char *
167 get_path_head(struct got_repository *repo)
168 {
169 	return get_path_git_child(repo, GOT_HEAD_FILE);
170 }
171 
172 char *
173 got_repo_get_path_gitconfig(struct got_repository *repo)
174 {
175 	return get_path_git_child(repo, GOT_GITCONFIG);
176 }
177 
178 char *
179 got_repo_get_path_gotconfig(struct got_repository *repo)
180 {
181 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
182 }
183 
184 const struct got_gotconfig *
185 got_repo_get_gotconfig(struct got_repository *repo)
186 {
187 	return repo->gotconfig;
188 }
189 
190 void
191 got_repo_get_gitconfig_remotes(int *nremotes,
192     const struct got_remote_repo **remotes, struct got_repository *repo)
193 {
194 	*nremotes = repo->ngitconfig_remotes;
195 	*remotes = repo->gitconfig_remotes;
196 }
197 
198 static int
199 is_git_repo(struct got_repository *repo)
200 {
201 	const char *path_git = got_repo_get_path_git_dir(repo);
202 	char *path_objects = got_repo_get_path_objects(repo);
203 	char *path_refs = got_repo_get_path_refs(repo);
204 	char *path_head = get_path_head(repo);
205 	int ret = 0;
206 	struct stat sb;
207 	struct got_reference *head_ref;
208 
209 	if (lstat(path_git, &sb) == -1)
210 		goto done;
211 	if (!S_ISDIR(sb.st_mode))
212 		goto done;
213 
214 	if (lstat(path_objects, &sb) == -1)
215 		goto done;
216 	if (!S_ISDIR(sb.st_mode))
217 		goto done;
218 
219 	if (lstat(path_refs, &sb) == -1)
220 		goto done;
221 	if (!S_ISDIR(sb.st_mode))
222 		goto done;
223 
224 	if (lstat(path_head, &sb) == -1)
225 		goto done;
226 	if (!S_ISREG(sb.st_mode))
227 		goto done;
228 
229 	/* Check if the HEAD reference can be opened. */
230 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
231 		goto done;
232 	got_ref_close(head_ref);
233 
234 	ret = 1;
235 done:
236 	free(path_objects);
237 	free(path_refs);
238 	free(path_head);
239 	return ret;
240 
241 }
242 
243 const struct got_error *
244 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
245     struct got_object *obj)
246 {
247 #ifndef GOT_NO_OBJ_CACHE
248 	const struct got_error *err = NULL;
249 	err = got_object_cache_add(&repo->objcache, id, obj);
250 	if (err) {
251 		if (err->code == GOT_ERR_OBJ_EXISTS ||
252 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
253 			err = NULL;
254 		return err;
255 	}
256 	obj->refcnt++;
257 #endif
258 	return NULL;
259 }
260 
261 struct got_object *
262 got_repo_get_cached_object(struct got_repository *repo,
263     struct got_object_id *id)
264 {
265 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
266 }
267 
268 const struct got_error *
269 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
270     struct got_tree_object *tree)
271 {
272 #ifndef GOT_NO_OBJ_CACHE
273 	const struct got_error *err = NULL;
274 	err = got_object_cache_add(&repo->treecache, id, tree);
275 	if (err) {
276 		if (err->code == GOT_ERR_OBJ_EXISTS ||
277 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
278 			err = NULL;
279 		return err;
280 	}
281 	tree->refcnt++;
282 #endif
283 	return NULL;
284 }
285 
286 struct got_tree_object *
287 got_repo_get_cached_tree(struct got_repository *repo,
288     struct got_object_id *id)
289 {
290 	return (struct got_tree_object *)got_object_cache_get(
291 	    &repo->treecache, id);
292 }
293 
294 const struct got_error *
295 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
296     struct got_commit_object *commit)
297 {
298 #ifndef GOT_NO_OBJ_CACHE
299 	const struct got_error *err = NULL;
300 	err = got_object_cache_add(&repo->commitcache, id, commit);
301 	if (err) {
302 		if (err->code == GOT_ERR_OBJ_EXISTS ||
303 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
304 			err = NULL;
305 		return err;
306 	}
307 	commit->refcnt++;
308 #endif
309 	return NULL;
310 }
311 
312 struct got_commit_object *
313 got_repo_get_cached_commit(struct got_repository *repo,
314     struct got_object_id *id)
315 {
316 	return (struct got_commit_object *)got_object_cache_get(
317 	    &repo->commitcache, id);
318 }
319 
320 const struct got_error *
321 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
322     struct got_tag_object *tag)
323 {
324 #ifndef GOT_NO_OBJ_CACHE
325 	const struct got_error *err = NULL;
326 	err = got_object_cache_add(&repo->tagcache, id, tag);
327 	if (err) {
328 		if (err->code == GOT_ERR_OBJ_EXISTS ||
329 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
330 			err = NULL;
331 		return err;
332 	}
333 	tag->refcnt++;
334 #endif
335 	return NULL;
336 }
337 
338 struct got_tag_object *
339 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
340 {
341 	return (struct got_tag_object *)got_object_cache_get(
342 	    &repo->tagcache, id);
343 }
344 
345 const struct got_error *
346 got_repo_cache_raw_object(struct got_repository *repo, struct got_object_id *id,
347     struct got_raw_object *raw)
348 {
349 #ifndef GOT_NO_OBJ_CACHE
350 	const struct got_error *err = NULL;
351 	err = got_object_cache_add(&repo->rawcache, id, raw);
352 	if (err) {
353 		if (err->code == GOT_ERR_OBJ_EXISTS ||
354 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
355 			err = NULL;
356 		return err;
357 	}
358 	raw->refcnt++;
359 #endif
360 	return NULL;
361 }
362 
363 
364 struct got_raw_object *
365 got_repo_get_cached_raw_object(struct got_repository *repo,
366     struct got_object_id *id)
367 {
368 	return (struct got_raw_object *)got_object_cache_get(&repo->rawcache, id);
369 }
370 
371 
372 static const struct got_error *
373 open_repo(struct got_repository *repo, const char *path)
374 {
375 	const struct got_error *err = NULL;
376 
377 	repo->gitdir_fd = -1;
378 
379 	/* bare git repository? */
380 	repo->path_git_dir = strdup(path);
381 	if (repo->path_git_dir == NULL)
382 		return got_error_from_errno("strdup");
383 	if (is_git_repo(repo)) {
384 		repo->path = strdup(repo->path_git_dir);
385 		if (repo->path == NULL) {
386 			err = got_error_from_errno("strdup");
387 			goto done;
388 		}
389 		repo->gitdir_fd = open(repo->path_git_dir,
390 		    O_DIRECTORY | O_CLOEXEC);
391 		if (repo->gitdir_fd == -1) {
392 			err = got_error_from_errno2("open",
393 			    repo->path_git_dir);
394 			goto done;
395 		}
396 		return NULL;
397 	}
398 
399 	/* git repository with working tree? */
400 	free(repo->path_git_dir);
401 	repo->path_git_dir = NULL;
402 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
403 		err = got_error_from_errno("asprintf");
404 		goto done;
405 	}
406 	if (is_git_repo(repo)) {
407 		repo->path = strdup(path);
408 		if (repo->path == NULL) {
409 			err = got_error_from_errno("strdup");
410 			goto done;
411 		}
412 		repo->gitdir_fd = open(repo->path_git_dir,
413 		    O_DIRECTORY | O_CLOEXEC);
414 		if (repo->gitdir_fd == -1) {
415 			err = got_error_from_errno2("open",
416 			    repo->path_git_dir);
417 			goto done;
418 		}
419 		return NULL;
420 	}
421 
422 	err = got_error(GOT_ERR_NOT_GIT_REPO);
423 done:
424 	if (err) {
425 		free(repo->path);
426 		repo->path = NULL;
427 		free(repo->path_git_dir);
428 		repo->path_git_dir = NULL;
429 		if (repo->gitdir_fd != -1)
430 			close(repo->gitdir_fd);
431 		repo->gitdir_fd = -1;
432 
433 	}
434 	return err;
435 }
436 
437 static const struct got_error *
438 parse_gitconfig_file(int *gitconfig_repository_format_version,
439     char **gitconfig_author_name, char **gitconfig_author_email,
440     struct got_remote_repo **remotes, int *nremotes,
441     char **gitconfig_owner, char ***extensions, int *nextensions,
442     const char *gitconfig_path)
443 {
444 	const struct got_error *err = NULL, *child_err = NULL;
445 	int fd = -1;
446 	int imsg_fds[2] = { -1, -1 };
447 	pid_t pid;
448 	struct imsgbuf *ibuf;
449 
450 	*gitconfig_repository_format_version = 0;
451 	if (extensions)
452 		*extensions = NULL;
453 	if (nextensions)
454 		*nextensions = 0;
455 	*gitconfig_author_name = NULL;
456 	*gitconfig_author_email = NULL;
457 	if (remotes)
458 		*remotes = NULL;
459 	if (nremotes)
460 		*nremotes = 0;
461 	if (gitconfig_owner)
462 		*gitconfig_owner = NULL;
463 
464 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
465 	if (fd == -1) {
466 		if (errno == ENOENT)
467 			return NULL;
468 		return got_error_from_errno2("open", gitconfig_path);
469 	}
470 
471 	ibuf = calloc(1, sizeof(*ibuf));
472 	if (ibuf == NULL) {
473 		err = got_error_from_errno("calloc");
474 		goto done;
475 	}
476 
477 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
478 		err = got_error_from_errno("socketpair");
479 		goto done;
480 	}
481 
482 	pid = fork();
483 	if (pid == -1) {
484 		err = got_error_from_errno("fork");
485 		goto done;
486 	} else if (pid == 0) {
487 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
488 		    gitconfig_path);
489 		/* not reached */
490 	}
491 
492 	if (close(imsg_fds[1]) == -1) {
493 		err = got_error_from_errno("close");
494 		goto done;
495 	}
496 	imsg_fds[1] = -1;
497 	imsg_init(ibuf, imsg_fds[0]);
498 
499 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
500 	if (err)
501 		goto done;
502 	fd = -1;
503 
504 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
505 	if (err)
506 		goto done;
507 
508 	err = got_privsep_recv_gitconfig_int(
509 	    gitconfig_repository_format_version, ibuf);
510 	if (err)
511 		goto done;
512 
513 	if (extensions && nextensions) {
514 		err = got_privsep_send_gitconfig_repository_extensions_req(
515 		    ibuf);
516 		if (err)
517 			goto done;
518 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
519 		if (err)
520 			goto done;
521 		if (*nextensions > 0) {
522 			int i;
523 			*extensions = calloc(*nextensions, sizeof(char *));
524 			if (*extensions == NULL) {
525 				err = got_error_from_errno("calloc");
526 				goto done;
527 			}
528 			for (i = 0; i < *nextensions; i++) {
529 				char *ext;
530 				err = got_privsep_recv_gitconfig_str(&ext,
531 				    ibuf);
532 				if (err)
533 					goto done;
534 				(*extensions)[i] = ext;
535 			}
536 		}
537 	}
538 
539 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
540 	if (err)
541 		goto done;
542 
543 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
544 	if (err)
545 		goto done;
546 
547 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
548 	if (err)
549 		goto done;
550 
551 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
552 	if (err)
553 		goto done;
554 
555 	if (remotes && nremotes) {
556 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
557 		if (err)
558 			goto done;
559 
560 		err = got_privsep_recv_gitconfig_remotes(remotes,
561 		    nremotes, ibuf);
562 		if (err)
563 			goto done;
564 	}
565 
566 	if (gitconfig_owner) {
567 		err = got_privsep_send_gitconfig_owner_req(ibuf);
568 		if (err)
569 			goto done;
570 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
571 		if (err)
572 			goto done;
573 	}
574 
575 	err = got_privsep_send_stop(imsg_fds[0]);
576 	child_err = got_privsep_wait_for_child(pid);
577 	if (child_err && err == NULL)
578 		err = child_err;
579 done:
580 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
581 		err = got_error_from_errno("close");
582 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
583 		err = got_error_from_errno("close");
584 	if (fd != -1 && close(fd) == -1 && err == NULL)
585 		err = got_error_from_errno2("close", gitconfig_path);
586 	free(ibuf);
587 	return err;
588 }
589 
590 static const struct got_error *
591 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
592 {
593 	const struct got_error *err = NULL;
594 	char *repo_gitconfig_path = NULL;
595 
596 	if (global_gitconfig_path) {
597 		/* Read settings from ~/.gitconfig. */
598 		int dummy_repo_version;
599 		err = parse_gitconfig_file(&dummy_repo_version,
600 		    &repo->global_gitconfig_author_name,
601 		    &repo->global_gitconfig_author_email,
602 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
603 		if (err)
604 			return err;
605 	}
606 
607 	/* Read repository's .git/config file. */
608 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
609 	if (repo_gitconfig_path == NULL)
610 		return got_error_from_errno("got_repo_get_path_gitconfig");
611 
612 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
613 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
614 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
615 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
616 	    repo_gitconfig_path);
617 	if (err)
618 		goto done;
619 done:
620 	free(repo_gitconfig_path);
621 	return err;
622 }
623 
624 static const struct got_error *
625 read_gotconfig(struct got_repository *repo)
626 {
627 	const struct got_error *err = NULL;
628 	char *gotconfig_path;
629 
630 	gotconfig_path = got_repo_get_path_gotconfig(repo);
631 	if (gotconfig_path == NULL)
632 		return got_error_from_errno("got_repo_get_path_gotconfig");
633 
634 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
635 	free(gotconfig_path);
636 	return err;
637 }
638 
639 /* Supported repository format extensions. */
640 static const char *repo_extensions[] = {
641 	"noop",			/* Got supports repository format version 1. */
642 	"preciousObjects",	/* Supported by gotadmin cleanup. */
643 	"worktreeConfig",	/* Got does not care about Git work trees. */
644 };
645 
646 const struct got_error *
647 got_repo_open(struct got_repository **repop, const char *path,
648     const char *global_gitconfig_path)
649 {
650 	struct got_repository *repo = NULL;
651 	const struct got_error *err = NULL;
652 	char *repo_path = NULL;
653 	size_t i;
654 	struct rlimit rl;
655 
656 	*repop = NULL;
657 
658 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
659 		return got_error_from_errno("getrlimit");
660 
661 	repo = calloc(1, sizeof(*repo));
662 	if (repo == NULL) {
663 		err = got_error_from_errno("calloc");
664 		goto done;
665 	}
666 
667 	RB_INIT(&repo->packidx_bloom_filters);
668 
669 	for (i = 0; i < nitems(repo->privsep_children); i++) {
670 		memset(&repo->privsep_children[i], 0,
671 		    sizeof(repo->privsep_children[0]));
672 		repo->privsep_children[i].imsg_fd = -1;
673 	}
674 
675 	err = got_object_cache_init(&repo->objcache,
676 	    GOT_OBJECT_CACHE_TYPE_OBJ);
677 	if (err)
678 		goto done;
679 	err = got_object_cache_init(&repo->treecache,
680 	    GOT_OBJECT_CACHE_TYPE_TREE);
681 	if (err)
682 		goto done;
683 	err = got_object_cache_init(&repo->commitcache,
684 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
685 	if (err)
686 		goto done;
687 	err = got_object_cache_init(&repo->tagcache,
688 	    GOT_OBJECT_CACHE_TYPE_TAG);
689 	if (err)
690 		goto done;
691 	err = got_object_cache_init(&repo->rawcache,
692 	    GOT_OBJECT_CACHE_TYPE_RAW);
693 	if (err)
694 		goto done;
695 
696 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
697 	if (repo->pack_cache_size > rl.rlim_cur / 8)
698 		repo->pack_cache_size = rl.rlim_cur / 8;
699 
700 	repo_path = realpath(path, NULL);
701 	if (repo_path == NULL) {
702 		err = got_error_from_errno2("realpath", path);
703 		goto done;
704 	}
705 
706 	for (;;) {
707 		char *parent_path;
708 
709 		err = open_repo(repo, repo_path);
710 		if (err == NULL)
711 			break;
712 		if (err->code != GOT_ERR_NOT_GIT_REPO)
713 			goto done;
714 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
715 			err = got_error(GOT_ERR_NOT_GIT_REPO);
716 			goto done;
717 		}
718 		err = got_path_dirname(&parent_path, repo_path);
719 		if (err)
720 			goto done;
721 		free(repo_path);
722 		repo_path = parent_path;
723 	}
724 
725 	err = read_gotconfig(repo);
726 	if (err)
727 		goto done;
728 
729 	err = read_gitconfig(repo, global_gitconfig_path);
730 	if (err)
731 		goto done;
732 	if (repo->gitconfig_repository_format_version != 0)
733 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
734 	for (i = 0; i < repo->nextensions; i++) {
735 		char *ext = repo->extensions[i];
736 		int j, supported = 0;
737 		for (j = 0; j < nitems(repo_extensions); j++) {
738 			if (strcmp(ext, repo_extensions[j]) == 0) {
739 				supported = 1;
740 				break;
741 			}
742 		}
743 		if (!supported) {
744 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
745 			goto done;
746 		}
747 	}
748 done:
749 	if (err)
750 		got_repo_close(repo);
751 	else
752 		*repop = repo;
753 	free(repo_path);
754 	return err;
755 }
756 
757 const struct got_error *
758 got_repo_close(struct got_repository *repo)
759 {
760 	const struct got_error *err = NULL, *child_err;
761 	struct got_packidx_bloom_filter *bf;
762 	size_t i;
763 
764 	for (i = 0; i < repo->pack_cache_size; i++) {
765 		if (repo->packidx_cache[i] == NULL)
766 			break;
767 		got_packidx_close(repo->packidx_cache[i]);
768 	}
769 
770 	while ((bf = RB_MIN(got_packidx_bloom_filter_tree,
771 	    &repo->packidx_bloom_filters))) {
772 		RB_REMOVE(got_packidx_bloom_filter_tree,
773 		    &repo->packidx_bloom_filters, bf);
774 		free(bf->bloom);
775 		free(bf);
776 	}
777 
778 	for (i = 0; i < repo->pack_cache_size; i++) {
779 		if (repo->packs[i].path_packfile == NULL)
780 			break;
781 		got_pack_close(&repo->packs[i]);
782 	}
783 
784 	free(repo->path);
785 	free(repo->path_git_dir);
786 
787 	got_object_cache_close(&repo->objcache);
788 	got_object_cache_close(&repo->treecache);
789 	got_object_cache_close(&repo->commitcache);
790 	got_object_cache_close(&repo->tagcache);
791 	got_object_cache_close(&repo->rawcache);
792 
793 	for (i = 0; i < nitems(repo->privsep_children); i++) {
794 		if (repo->privsep_children[i].imsg_fd == -1)
795 			continue;
796 		imsg_clear(repo->privsep_children[i].ibuf);
797 		free(repo->privsep_children[i].ibuf);
798 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
799 		child_err = got_privsep_wait_for_child(
800 		    repo->privsep_children[i].pid);
801 		if (child_err && err == NULL)
802 			err = child_err;
803 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
804 		    err == NULL)
805 			err = got_error_from_errno("close");
806 	}
807 
808 	if (repo->gitdir_fd != -1 && close(repo->gitdir_fd) == -1 &&
809 	    err == NULL)
810 		err = got_error_from_errno("close");
811 
812 	if (repo->gotconfig)
813 		got_gotconfig_free(repo->gotconfig);
814 	free(repo->gitconfig_author_name);
815 	free(repo->gitconfig_author_email);
816 	for (i = 0; i < repo->ngitconfig_remotes; i++)
817 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
818 	free(repo->gitconfig_remotes);
819 	for (i = 0; i < repo->nextensions; i++)
820 		free(repo->extensions[i]);
821 	free(repo->extensions);
822 	free(repo);
823 
824 	return err;
825 }
826 
827 void
828 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
829 {
830 	int i;
831 
832 	free(repo->name);
833 	repo->name = NULL;
834 	free(repo->fetch_url);
835 	repo->fetch_url = NULL;
836 	free(repo->send_url);
837 	repo->send_url = NULL;
838 	for (i = 0; i < repo->nfetch_branches; i++)
839 		free(repo->fetch_branches[i]);
840 	free(repo->fetch_branches);
841 	repo->fetch_branches = NULL;
842 	repo->nfetch_branches = 0;
843 	for (i = 0; i < repo->nsend_branches; i++)
844 		free(repo->send_branches[i]);
845 	free(repo->send_branches);
846 	repo->send_branches = NULL;
847 	repo->nsend_branches = 0;
848 }
849 
850 const struct got_error *
851 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
852     const char *input_path)
853 {
854 	const struct got_error *err = NULL;
855 	const char *repo_abspath = NULL;
856 	size_t repolen, len;
857 	char *canonpath, *path = NULL;
858 
859 	*in_repo_path = NULL;
860 
861 	canonpath = strdup(input_path);
862 	if (canonpath == NULL) {
863 		err = got_error_from_errno("strdup");
864 		goto done;
865 	}
866 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
867 	if (err)
868 		goto done;
869 
870 	repo_abspath = got_repo_get_path(repo);
871 
872 	if (canonpath[0] == '\0') {
873 		path = strdup(canonpath);
874 		if (path == NULL) {
875 			err = got_error_from_errno("strdup");
876 			goto done;
877 		}
878 	} else {
879 		path = realpath(canonpath, NULL);
880 		if (path == NULL) {
881 			if (errno != ENOENT) {
882 				err = got_error_from_errno2("realpath",
883 				    canonpath);
884 				goto done;
885 			}
886 			/*
887 			 * Path is not on disk.
888 			 * Assume it is already relative to repository root.
889 			 */
890 			path = strdup(canonpath);
891 			if (path == NULL) {
892 				err = got_error_from_errno("strdup");
893 				goto done;
894 			}
895 		}
896 
897 		repolen = strlen(repo_abspath);
898 		len = strlen(path);
899 
900 
901 		if (strcmp(path, repo_abspath) == 0) {
902 			free(path);
903 			path = strdup("");
904 			if (path == NULL) {
905 				err = got_error_from_errno("strdup");
906 				goto done;
907 			}
908 		} else if (len > repolen &&
909 		    got_path_is_child(path, repo_abspath, repolen)) {
910 			/* Matched an on-disk path inside repository. */
911 			if (got_repo_is_bare(repo)) {
912 				/*
913 				 * Matched an on-disk path inside repository
914 				 * database. Treat input as repository-relative.
915 				 */
916 				free(path);
917 				path = canonpath;
918 				canonpath = NULL;
919 			} else {
920 				char *child;
921 				/* Strip common prefix with repository path. */
922 				err = got_path_skip_common_ancestor(&child,
923 				    repo_abspath, path);
924 				if (err)
925 					goto done;
926 				free(path);
927 				path = child;
928 			}
929 		} else {
930 			/*
931 			 * Matched unrelated on-disk path.
932 			 * Treat input as repository-relative.
933 			 */
934 			free(path);
935 			path = canonpath;
936 			canonpath = NULL;
937 		}
938 	}
939 
940 	/* Make in-repository path absolute */
941 	if (path[0] != '/') {
942 		char *abspath;
943 		if (asprintf(&abspath, "/%s", path) == -1) {
944 			err = got_error_from_errno("asprintf");
945 			goto done;
946 		}
947 		free(path);
948 		path = abspath;
949 	}
950 
951 done:
952 	free(canonpath);
953 	if (err)
954 		free(path);
955 	else
956 		*in_repo_path = path;
957 	return err;
958 }
959 
960 static const struct got_error *
961 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
962     const char *path_packidx)
963 {
964 	const struct got_error *err = NULL;
965 	size_t i;
966 
967 	for (i = 0; i < repo->pack_cache_size; i++) {
968 		if (repo->packidx_cache[i] == NULL)
969 			break;
970 		if (strcmp(repo->packidx_cache[i]->path_packidx,
971 		    path_packidx) == 0) {
972 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
973 		}
974 	}
975 	if (i == repo->pack_cache_size) {
976 		i = repo->pack_cache_size - 1;
977 		err = got_packidx_close(repo->packidx_cache[i]);
978 		if (err)
979 			return err;
980 	}
981 
982 	repo->packidx_cache[i] = packidx;
983 
984 	return NULL;
985 }
986 
987 int
988 got_repo_is_packidx_filename(const char *name, size_t len)
989 {
990 	if (len != GOT_PACKIDX_NAMELEN)
991 		return 0;
992 
993 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
994 		return 0;
995 
996 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
997 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
998 		return 0;
999 
1000 	return 1;
1001 }
1002 
1003 static struct got_packidx_bloom_filter *
1004 get_packidx_bloom_filter(struct got_repository *repo,
1005     const char *path, size_t path_len)
1006 {
1007 	struct got_packidx_bloom_filter key;
1008 
1009 	if (strlcpy(key.path, path, sizeof(key.path)) >= sizeof(key.path))
1010 		return NULL; /* XXX */
1011 	key.path_len = path_len;
1012 
1013 	return RB_FIND(got_packidx_bloom_filter_tree,
1014 	    &repo->packidx_bloom_filters, &key);
1015 }
1016 
1017 int
1018 got_repo_check_packidx_bloom_filter(struct got_repository *repo,
1019     const char *path_packidx, struct got_object_id *id)
1020 {
1021 	struct got_packidx_bloom_filter *bf;
1022 
1023 	bf = get_packidx_bloom_filter(repo, path_packidx, strlen(path_packidx));
1024 	if (bf)
1025 		return bloom_check(bf->bloom, id->sha1, sizeof(id->sha1));
1026 
1027 	/* No bloom filter means this pack index must be searched. */
1028 	return 1;
1029 }
1030 
1031 static const struct got_error *
1032 add_packidx_bloom_filter(struct got_repository *repo,
1033     struct got_packidx *packidx, const char *path_packidx)
1034 {
1035 	int i, nobjects = be32toh(packidx->hdr.fanout_table[0xff]);
1036 	struct got_packidx_bloom_filter *bf;
1037 	size_t len;
1038 
1039 	/*
1040 	 * Don't use bloom filters for very large pack index files.
1041 	 * Large pack files will contain a relatively large fraction
1042 	 * of our objects so we will likely need to visit them anyway.
1043 	 * The more objects a pack file contains the higher the probability
1044 	 * of a false-positive match from the bloom filter. And reading
1045 	 * all object IDs from a large pack index file can be expensive.
1046 	 */
1047 	if (nobjects > 100000) /* cut-off at about 2MB, at 20 bytes per ID */
1048 		return NULL;
1049 
1050 	/* Do we already have a filter for this pack index? */
1051 	if (get_packidx_bloom_filter(repo, path_packidx,
1052 	    strlen(path_packidx)) != NULL)
1053 		return NULL;
1054 
1055 	bf = calloc(1, sizeof(*bf));
1056 	if (bf == NULL)
1057 		return got_error_from_errno("calloc");
1058 	bf->bloom = calloc(1, sizeof(*bf->bloom));
1059 	if (bf->bloom == NULL) {
1060 		free(bf);
1061 		return got_error_from_errno("calloc");
1062 	}
1063 	
1064 	len = strlcpy(bf->path, path_packidx, sizeof(bf->path));
1065 	if (len >= sizeof(bf->path)) {
1066 		free(bf->bloom);
1067 		free(bf);
1068 		return got_error(GOT_ERR_NO_SPACE);
1069 	}
1070 	bf->path_len = len;
1071 
1072 	/* Minimum size supported by our bloom filter is 1000 entries. */
1073 	bloom_init(bf->bloom, nobjects < 1000 ? 1000 : nobjects, 0.1);
1074 	for (i = 0; i < nobjects; i++) {
1075 		struct got_packidx_object_id *id;
1076 		id = &packidx->hdr.sorted_ids[i];
1077 		bloom_add(bf->bloom, id->sha1, sizeof(id->sha1));
1078 	}
1079 
1080 	RB_INSERT(got_packidx_bloom_filter_tree,
1081 	    &repo->packidx_bloom_filters, bf);
1082 	return NULL;
1083 }
1084 
1085 const struct got_error *
1086 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
1087     struct got_repository *repo, struct got_object_id *id)
1088 {
1089 	const struct got_error *err;
1090 	DIR *packdir = NULL;
1091 	struct dirent *dent;
1092 	char *path_packidx;
1093 	size_t i;
1094 	int packdir_fd;
1095 
1096 	/* Search pack index cache. */
1097 	for (i = 0; i < repo->pack_cache_size; i++) {
1098 		if (repo->packidx_cache[i] == NULL)
1099 			break;
1100 		if (!got_repo_check_packidx_bloom_filter(repo,
1101 		    repo->packidx_cache[i]->path_packidx, id))
1102 			continue; /* object will not be found in this index */
1103 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
1104 		if (*idx != -1) {
1105 			*packidx = repo->packidx_cache[i];
1106 			/*
1107 			 * Move this cache entry to the front. Repeatedly
1108 			 * searching a wrong pack index can be expensive.
1109 			 */
1110 			if (i > 0) {
1111 				memmove(&repo->packidx_cache[1],
1112 				    &repo->packidx_cache[0],
1113 				    i * sizeof(repo->packidx_cache[0]));
1114 				repo->packidx_cache[0] = *packidx;
1115 			}
1116 			return NULL;
1117 		}
1118 	}
1119 	/* No luck. Search the filesystem. */
1120 
1121 	packdir_fd = openat(got_repo_get_fd(repo),
1122 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1123 	if (packdir_fd == -1) {
1124 		if (errno == ENOENT)
1125 			err = got_error_no_obj(id);
1126 		else
1127 			err = got_error_from_errno_fmt("openat: %s/%s",
1128 			    got_repo_get_path_git_dir(repo),
1129 			    GOT_OBJECTS_PACK_DIR);
1130 		goto done;
1131 	}
1132 
1133 	packdir = fdopendir(packdir_fd);
1134 	if (packdir == NULL) {
1135 		err = got_error_from_errno("fdopendir");
1136 		goto done;
1137 	}
1138 
1139 	while ((dent = readdir(packdir)) != NULL) {
1140 		int is_cached = 0;
1141 
1142 		if (!got_repo_is_packidx_filename(dent->d_name,
1143 		    strlen(dent->d_name)))
1144 			continue;
1145 
1146 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1147 		    dent->d_name) == -1) {
1148 			err = got_error_from_errno("asprintf");
1149 			goto done;
1150 		}
1151 
1152 		if (!got_repo_check_packidx_bloom_filter(repo,
1153 		    path_packidx, id)) {
1154 			free(path_packidx);
1155 			continue; /* object will not be found in this index */
1156 		}
1157 
1158 		for (i = 0; i < repo->pack_cache_size; i++) {
1159 			if (repo->packidx_cache[i] == NULL)
1160 				break;
1161 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1162 			    path_packidx) == 0) {
1163 				is_cached = 1;
1164 				break;
1165 			}
1166 		}
1167 		if (is_cached) {
1168 			free(path_packidx);
1169 			continue; /* already searched */
1170 		}
1171 
1172 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1173 		    path_packidx, 0);
1174 		if (err) {
1175 			free(path_packidx);
1176 			goto done;
1177 		}
1178 
1179 		err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1180 		if (err) {
1181 			free(path_packidx);
1182 			goto done;
1183 		}
1184 
1185 		err = cache_packidx(repo, *packidx, path_packidx);
1186 		free(path_packidx);
1187 		if (err)
1188 			goto done;
1189 
1190 		*idx = got_packidx_get_object_idx(*packidx, id);
1191 		if (*idx != -1) {
1192 			err = NULL; /* found the object */
1193 			goto done;
1194 		}
1195 	}
1196 
1197 	err = got_error_no_obj(id);
1198 done:
1199 	if (packdir && closedir(packdir) != 0 && err == NULL)
1200 		err = got_error_from_errno("closedir");
1201 	return err;
1202 }
1203 
1204 const struct got_error *
1205 got_repo_list_packidx(struct got_pathlist_head *packidx_paths,
1206     struct got_repository *repo)
1207 {
1208 	const struct got_error *err = NULL;
1209 	DIR *packdir = NULL;
1210 	struct dirent *dent;
1211 	char *path_packidx = NULL;
1212 	int packdir_fd;
1213 
1214 	packdir_fd = openat(got_repo_get_fd(repo),
1215 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1216 	if (packdir_fd == -1) {
1217 		return got_error_from_errno_fmt("openat: %s/%s",
1218 		    got_repo_get_path_git_dir(repo),
1219 		    GOT_OBJECTS_PACK_DIR);
1220 	}
1221 
1222 	packdir = fdopendir(packdir_fd);
1223 	if (packdir == NULL) {
1224 		err = got_error_from_errno("fdopendir");
1225 		goto done;
1226 	}
1227 
1228 	while ((dent = readdir(packdir)) != NULL) {
1229 		if (!got_repo_is_packidx_filename(dent->d_name,
1230 		    strlen(dent->d_name)))
1231 			continue;
1232 
1233 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1234 		    dent->d_name) == -1) {
1235 			err = got_error_from_errno("asprintf");
1236 			path_packidx = NULL;
1237 			break;
1238 		}
1239 
1240 		err = got_pathlist_append(packidx_paths, path_packidx, NULL);
1241 		if (err)
1242 			break;
1243 	}
1244 done:
1245 	if (err)
1246 		free(path_packidx);
1247 	if (packdir && closedir(packdir) != 0 && err == NULL)
1248 		err = got_error_from_errno("closedir");
1249 	return err;
1250 }
1251 
1252 const struct got_error *
1253 got_repo_get_packidx(struct got_packidx **packidx, const char *path_packidx,
1254     struct got_repository *repo)
1255 {
1256 	const struct got_error *err;
1257 	size_t i;
1258 
1259 	*packidx = NULL;
1260 
1261 	/* Search pack index cache. */
1262 	for (i = 0; i < repo->pack_cache_size; i++) {
1263 		if (repo->packidx_cache[i] == NULL)
1264 			break;
1265 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1266 		    path_packidx) == 0) {
1267 			*packidx = repo->packidx_cache[i];
1268 			return NULL;
1269 		}
1270 	}
1271 	/* No luck. Search the filesystem. */
1272 
1273 	err = got_packidx_open(packidx, got_repo_get_fd(repo),
1274 	    path_packidx, 0);
1275 	if (err)
1276 		return err;
1277 
1278 	err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1279 	if (err)
1280 		goto done;
1281 
1282 	err = cache_packidx(repo, *packidx, path_packidx);
1283 done:
1284 	if (err) {
1285 		got_packidx_close(*packidx);
1286 		*packidx = NULL;
1287 	}
1288 	return err;
1289 }
1290 
1291 static const struct got_error *
1292 read_packfile_hdr(int fd, struct got_packidx *packidx)
1293 {
1294 	const struct got_error *err = NULL;
1295 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1296 	struct got_packfile_hdr hdr;
1297 	ssize_t n;
1298 
1299 	n = read(fd, &hdr, sizeof(hdr));
1300 	if (n < 0)
1301 		return got_error_from_errno("read");
1302 	if (n != sizeof(hdr))
1303 		return got_error(GOT_ERR_BAD_PACKFILE);
1304 
1305 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1306 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1307 	    be32toh(hdr.nobjects) != totobj)
1308 		err = got_error(GOT_ERR_BAD_PACKFILE);
1309 
1310 	return err;
1311 }
1312 
1313 static const struct got_error *
1314 open_packfile(int *fd, struct got_repository *repo,
1315     const char *relpath, struct got_packidx *packidx)
1316 {
1317 	const struct got_error *err = NULL;
1318 
1319 	*fd = openat(got_repo_get_fd(repo), relpath,
1320 	    O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
1321 	if (*fd == -1)
1322 		return got_error_from_errno_fmt("openat: %s/%s",
1323 		    got_repo_get_path_git_dir(repo), relpath);
1324 
1325 	if (packidx) {
1326 		err = read_packfile_hdr(*fd, packidx);
1327 		if (err) {
1328 			close(*fd);
1329 			*fd = -1;
1330 		}
1331 	}
1332 
1333 	return err;
1334 }
1335 
1336 const struct got_error *
1337 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1338     const char *path_packfile, struct got_packidx *packidx)
1339 {
1340 	const struct got_error *err = NULL;
1341 	struct got_pack *pack = NULL;
1342 	struct stat sb;
1343 	size_t i;
1344 
1345 	if (packp)
1346 		*packp = NULL;
1347 
1348 	for (i = 0; i < repo->pack_cache_size; i++) {
1349 		pack = &repo->packs[i];
1350 		if (pack->path_packfile == NULL)
1351 			break;
1352 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1353 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1354 	}
1355 
1356 	if (i == repo->pack_cache_size) {
1357 		err = got_pack_close(&repo->packs[i - 1]);
1358 		if (err)
1359 			return err;
1360 		memmove(&repo->packs[1], &repo->packs[0],
1361 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1362 		i = 0;
1363 	}
1364 
1365 	pack = &repo->packs[i];
1366 
1367 	pack->path_packfile = strdup(path_packfile);
1368 	if (pack->path_packfile == NULL) {
1369 		err = got_error_from_errno("strdup");
1370 		goto done;
1371 	}
1372 
1373 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1374 	if (err)
1375 		goto done;
1376 
1377 	if (fstat(pack->fd, &sb) != 0) {
1378 		err = got_error_from_errno("fstat");
1379 		goto done;
1380 	}
1381 	pack->filesize = sb.st_size;
1382 
1383 	pack->privsep_child = NULL;
1384 
1385 #ifndef GOT_PACK_NO_MMAP
1386 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1387 	    pack->fd, 0);
1388 	if (pack->map == MAP_FAILED) {
1389 		if (errno != ENOMEM) {
1390 			err = got_error_from_errno("mmap");
1391 			goto done;
1392 		}
1393 		pack->map = NULL; /* fall back to read(2) */
1394 	}
1395 #endif
1396 done:
1397 	if (err) {
1398 		if (pack) {
1399 			free(pack->path_packfile);
1400 			memset(pack, 0, sizeof(*pack));
1401 		}
1402 	} else if (packp)
1403 		*packp = pack;
1404 	return err;
1405 }
1406 
1407 struct got_pack *
1408 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1409 {
1410 	struct got_pack *pack = NULL;
1411 	size_t i;
1412 
1413 	for (i = 0; i < repo->pack_cache_size; i++) {
1414 		pack = &repo->packs[i];
1415 		if (pack->path_packfile == NULL)
1416 			break;
1417 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1418 			return pack;
1419 	}
1420 
1421 	return NULL;
1422 }
1423 
1424 const struct got_error *
1425 got_repo_init(const char *repo_path)
1426 {
1427 	const struct got_error *err = NULL;
1428 	const char *dirnames[] = {
1429 		GOT_OBJECTS_DIR,
1430 		GOT_OBJECTS_PACK_DIR,
1431 		GOT_REFS_DIR,
1432 	};
1433 	const char *description_str = "Unnamed repository; "
1434 	    "edit this file 'description' to name the repository.";
1435 	const char *headref_str = "ref: refs/heads/main";
1436 	const char *gitconfig_str = "[core]\n"
1437 	    "\trepositoryformatversion = 0\n"
1438 	    "\tfilemode = true\n"
1439 	    "\tbare = true\n";
1440 	char *path;
1441 	size_t i;
1442 
1443 	if (!got_path_dir_is_empty(repo_path))
1444 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1445 
1446 	for (i = 0; i < nitems(dirnames); i++) {
1447 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1448 			return got_error_from_errno("asprintf");
1449 		}
1450 		err = got_path_mkdir(path);
1451 		free(path);
1452 		if (err)
1453 			return err;
1454 	}
1455 
1456 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1457 		return got_error_from_errno("asprintf");
1458 	err = got_path_create_file(path, description_str);
1459 	free(path);
1460 	if (err)
1461 		return err;
1462 
1463 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1464 		return got_error_from_errno("asprintf");
1465 	err = got_path_create_file(path, headref_str);
1466 	free(path);
1467 	if (err)
1468 		return err;
1469 
1470 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1471 		return got_error_from_errno("asprintf");
1472 	err = got_path_create_file(path, gitconfig_str);
1473 	free(path);
1474 	if (err)
1475 		return err;
1476 
1477 	return NULL;
1478 }
1479 
1480 static const struct got_error *
1481 match_packed_object(struct got_object_id **unique_id,
1482     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1483 {
1484 	const struct got_error *err = NULL;
1485 	DIR *packdir = NULL;
1486 	struct dirent *dent;
1487 	char *path_packidx;
1488 	struct got_object_id_queue matched_ids;
1489 	int packdir_fd;
1490 
1491 	STAILQ_INIT(&matched_ids);
1492 
1493 	packdir_fd = openat(got_repo_get_fd(repo),
1494 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1495 	if (packdir_fd == -1) {
1496 		if (errno != ENOENT) {
1497 			err = got_error_from_errno2("openat",
1498 			    GOT_OBJECTS_PACK_DIR);
1499 		}
1500 		goto done;
1501 	}
1502 
1503 	packdir = fdopendir(packdir_fd);
1504 	if (packdir == NULL) {
1505 		err = got_error_from_errno("fdopendir");
1506 		goto done;
1507 	}
1508 
1509 	while ((dent = readdir(packdir)) != NULL) {
1510 		struct got_packidx *packidx;
1511 		struct got_object_qid *qid;
1512 
1513 		if (!got_repo_is_packidx_filename(dent->d_name,
1514 		    strlen(dent->d_name)))
1515 			continue;
1516 
1517 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1518 		    dent->d_name) == -1) {
1519 			err = got_error_from_errno("strdup");
1520 			break;
1521 		}
1522 
1523 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1524 		    path_packidx, 0);
1525 		free(path_packidx);
1526 		if (err)
1527 			break;
1528 
1529 		err = got_packidx_match_id_str_prefix(&matched_ids,
1530 		    packidx, id_str_prefix);
1531 		if (err) {
1532 			got_packidx_close(packidx);
1533 			break;
1534 		}
1535 		err = got_packidx_close(packidx);
1536 		if (err)
1537 			break;
1538 
1539 		STAILQ_FOREACH(qid, &matched_ids, entry) {
1540 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1541 				int matched_type;
1542 				err = got_object_get_type(&matched_type, repo,
1543 				    qid->id);
1544 				if (err)
1545 					goto done;
1546 				if (matched_type != obj_type)
1547 					continue;
1548 			}
1549 			if (*unique_id == NULL) {
1550 				*unique_id = got_object_id_dup(qid->id);
1551 				if (*unique_id == NULL) {
1552 					err = got_error_from_errno("malloc");
1553 					goto done;
1554 				}
1555 			} else {
1556 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1557 					continue; /* packed multiple times */
1558 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1559 				goto done;
1560 			}
1561 		}
1562 	}
1563 done:
1564 	got_object_id_queue_free(&matched_ids);
1565 	if (packdir && closedir(packdir) != 0 && err == NULL)
1566 		err = got_error_from_errno("closedir");
1567 	if (err) {
1568 		free(*unique_id);
1569 		*unique_id = NULL;
1570 	}
1571 	return err;
1572 }
1573 
1574 static const struct got_error *
1575 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1576     const char *object_dir, const char *id_str_prefix, int obj_type,
1577     struct got_repository *repo)
1578 {
1579 	const struct got_error *err = NULL;
1580 	char *path;
1581 	DIR *dir = NULL;
1582 	struct dirent *dent;
1583 	struct got_object_id id;
1584 
1585 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1586 		err = got_error_from_errno("asprintf");
1587 		goto done;
1588 	}
1589 
1590 	dir = opendir(path);
1591 	if (dir == NULL) {
1592 		if (errno == ENOENT) {
1593 			err = NULL;
1594 			goto done;
1595 		}
1596 		err = got_error_from_errno2("opendir", path);
1597 		goto done;
1598 	}
1599 	while ((dent = readdir(dir)) != NULL) {
1600 		char *id_str;
1601 		int cmp;
1602 
1603 		if (strcmp(dent->d_name, ".") == 0 ||
1604 		    strcmp(dent->d_name, "..") == 0)
1605 			continue;
1606 
1607 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1608 			err = got_error_from_errno("asprintf");
1609 			goto done;
1610 		}
1611 
1612 		if (!got_parse_sha1_digest(id.sha1, id_str))
1613 			continue;
1614 
1615 		/*
1616 		 * Directory entries do not necessarily appear in
1617 		 * sorted order, so we must iterate over all of them.
1618 		 */
1619 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1620 		if (cmp != 0) {
1621 			free(id_str);
1622 			continue;
1623 		}
1624 
1625 		if (*unique_id == NULL) {
1626 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1627 				int matched_type;
1628 				err = got_object_get_type(&matched_type, repo,
1629 				    &id);
1630 				if (err)
1631 					goto done;
1632 				if (matched_type != obj_type)
1633 					continue;
1634 			}
1635 			*unique_id = got_object_id_dup(&id);
1636 			if (*unique_id == NULL) {
1637 				err = got_error_from_errno("got_object_id_dup");
1638 				free(id_str);
1639 				goto done;
1640 			}
1641 		} else {
1642 			if (got_object_id_cmp(*unique_id, &id) == 0)
1643 				continue; /* both packed and loose */
1644 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1645 			free(id_str);
1646 			goto done;
1647 		}
1648 	}
1649 done:
1650 	if (dir && closedir(dir) != 0 && err == NULL)
1651 		err = got_error_from_errno("closedir");
1652 	if (err) {
1653 		free(*unique_id);
1654 		*unique_id = NULL;
1655 	}
1656 	free(path);
1657 	return err;
1658 }
1659 
1660 const struct got_error *
1661 got_repo_match_object_id_prefix(struct got_object_id **id,
1662     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1663 {
1664 	const struct got_error *err = NULL;
1665 	char *path_objects = got_repo_get_path_objects(repo);
1666 	char *object_dir = NULL;
1667 	size_t len;
1668 	int i;
1669 
1670 	*id = NULL;
1671 
1672 	for (i = 0; i < strlen(id_str_prefix); i++) {
1673 		if (isxdigit((unsigned char)id_str_prefix[i]))
1674 			continue;
1675 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1676 	}
1677 
1678 	len = strlen(id_str_prefix);
1679 	if (len >= 2) {
1680 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1681 		if (err)
1682 			goto done;
1683 		object_dir = strndup(id_str_prefix, 2);
1684 		if (object_dir == NULL) {
1685 			err = got_error_from_errno("strdup");
1686 			goto done;
1687 		}
1688 		err = match_loose_object(id, path_objects, object_dir,
1689 		    id_str_prefix, obj_type, repo);
1690 	} else if (len == 1) {
1691 		int i;
1692 		for (i = 0; i < 0xf; i++) {
1693 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1694 			    == -1) {
1695 				err = got_error_from_errno("asprintf");
1696 				goto done;
1697 			}
1698 			err = match_packed_object(id, repo, object_dir,
1699 			    obj_type);
1700 			if (err)
1701 				goto done;
1702 			err = match_loose_object(id, path_objects, object_dir,
1703 			    id_str_prefix, obj_type, repo);
1704 			if (err)
1705 				goto done;
1706 		}
1707 	} else {
1708 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1709 		goto done;
1710 	}
1711 done:
1712 	free(object_dir);
1713 	if (err) {
1714 		free(*id);
1715 		*id = NULL;
1716 	} else if (*id == NULL) {
1717 		switch (obj_type) {
1718 		case GOT_OBJ_TYPE_BLOB:
1719 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1720 			    GOT_OBJ_LABEL_BLOB, id_str_prefix);
1721 			break;
1722 		case GOT_OBJ_TYPE_TREE:
1723 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1724 			    GOT_OBJ_LABEL_TREE, id_str_prefix);
1725 			break;
1726 		case GOT_OBJ_TYPE_COMMIT:
1727 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1728 			    GOT_OBJ_LABEL_COMMIT, id_str_prefix);
1729 			break;
1730 		case GOT_OBJ_TYPE_TAG:
1731 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1732 			    GOT_OBJ_LABEL_TAG, id_str_prefix);
1733 			break;
1734 		default:
1735 			err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1736 			break;
1737 		}
1738 	}
1739 
1740 	return err;
1741 }
1742 
1743 const struct got_error *
1744 got_repo_match_object_id(struct got_object_id **id, char **label,
1745     const char *id_str, int obj_type, struct got_reflist_head *refs,
1746     struct got_repository *repo)
1747 {
1748 	const struct got_error *err;
1749 	struct got_tag_object *tag;
1750 	struct got_reference *ref = NULL;
1751 
1752 	*id = NULL;
1753 	if (label)
1754 		*label = NULL;
1755 
1756 	if (refs) {
1757 		err = got_repo_object_match_tag(&tag, id_str, obj_type,
1758 		    refs, repo);
1759 		if (err == NULL) {
1760 			*id = got_object_id_dup(
1761 			    got_object_tag_get_object_id(tag));
1762 			if (*id == NULL)
1763 				err = got_error_from_errno("got_object_id_dup");
1764 			else if (label && asprintf(label, "refs/tags/%s",
1765 			    got_object_tag_get_name(tag)) == -1) {
1766 				err = got_error_from_errno("asprintf");
1767 				free(*id);
1768 				*id = NULL;
1769 			}
1770 			got_object_tag_close(tag);
1771 			return err;
1772 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1773 		    err->code != GOT_ERR_NO_OBJ)
1774 			return err;
1775 	}
1776 
1777 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1778 	if (err) {
1779 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1780 			return err;
1781 		err = got_ref_open(&ref, repo, id_str, 0);
1782 		if (err != NULL)
1783 			goto done;
1784 		if (label) {
1785 			*label = strdup(got_ref_get_name(ref));
1786 			if (*label == NULL) {
1787 				err = got_error_from_errno("strdup");
1788 				goto done;
1789 			}
1790 		}
1791 		err = got_ref_resolve(id, repo, ref);
1792 	} else if (label) {
1793 		err = got_object_id_str(label, *id);
1794 		if (*label == NULL) {
1795 			err = got_error_from_errno("strdup");
1796 			goto done;
1797 		}
1798 	}
1799 done:
1800 	if (ref)
1801 		got_ref_close(ref);
1802 	return err;
1803 }
1804 
1805 const struct got_error *
1806 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1807     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1808 {
1809 	const struct got_error *err = NULL;
1810 	struct got_reflist_entry *re;
1811 	struct got_object_id *tag_id;
1812 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1813 
1814 	*tag = NULL;
1815 
1816 	TAILQ_FOREACH(re, refs, entry) {
1817 		const char *refname;
1818 		refname = got_ref_get_name(re->ref);
1819 		if (got_ref_is_symbolic(re->ref))
1820 			continue;
1821 		if (strncmp(refname, "refs/tags/", 10) != 0)
1822 			continue;
1823 		if (!name_is_absolute)
1824 			refname += strlen("refs/tags/");
1825 		if (strcmp(refname, name) != 0)
1826 			continue;
1827 		err = got_ref_resolve(&tag_id, repo, re->ref);
1828 		if (err)
1829 			break;
1830 		err = got_object_open_as_tag(tag, repo, tag_id);
1831 		free(tag_id);
1832 		if (err)
1833 			break;
1834 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1835 		    got_object_tag_get_object_type(*tag) == obj_type)
1836 			break;
1837 		got_object_tag_close(*tag);
1838 		*tag = NULL;
1839 	}
1840 
1841 	if (err == NULL && *tag == NULL)
1842 		err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1843 		    GOT_OBJ_LABEL_TAG, name);
1844 	return err;
1845 }
1846 
1847 static const struct got_error *
1848 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1849     const char *name, mode_t mode, struct got_object_id *blob_id)
1850 {
1851 	const struct got_error *err = NULL;
1852 
1853 	 *new_te = NULL;
1854 
1855 	*new_te = calloc(1, sizeof(**new_te));
1856 	if (*new_te == NULL)
1857 		return got_error_from_errno("calloc");
1858 
1859 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1860 	    sizeof((*new_te)->name)) {
1861 		err = got_error(GOT_ERR_NO_SPACE);
1862 		goto done;
1863 	}
1864 
1865 	if (S_ISLNK(mode)) {
1866 		(*new_te)->mode = S_IFLNK;
1867 	} else {
1868 		(*new_te)->mode = S_IFREG;
1869 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1870 	}
1871 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1872 done:
1873 	if (err && *new_te) {
1874 		free(*new_te);
1875 		*new_te = NULL;
1876 	}
1877 	return err;
1878 }
1879 
1880 static const struct got_error *
1881 import_file(struct got_tree_entry **new_te, struct dirent *de,
1882     const char *path, struct got_repository *repo)
1883 {
1884 	const struct got_error *err;
1885 	struct got_object_id *blob_id = NULL;
1886 	char *filepath;
1887 	struct stat sb;
1888 
1889 	if (asprintf(&filepath, "%s%s%s", path,
1890 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1891 		return got_error_from_errno("asprintf");
1892 
1893 	if (lstat(filepath, &sb) != 0) {
1894 		err = got_error_from_errno2("lstat", path);
1895 		goto done;
1896 	}
1897 
1898 	err = got_object_blob_create(&blob_id, filepath, repo);
1899 	if (err)
1900 		goto done;
1901 
1902 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1903 	    blob_id);
1904 done:
1905 	free(filepath);
1906 	if (err)
1907 		free(blob_id);
1908 	return err;
1909 }
1910 
1911 static const struct got_error *
1912 insert_tree_entry(struct got_tree_entry *new_te,
1913     struct got_pathlist_head *paths)
1914 {
1915 	const struct got_error *err = NULL;
1916 	struct got_pathlist_entry *new_pe;
1917 
1918 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1919 	if (err)
1920 		return err;
1921 	if (new_pe == NULL)
1922 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1923 	return NULL;
1924 }
1925 
1926 static const struct got_error *write_tree(struct got_object_id **,
1927     const char *, struct got_pathlist_head *, struct got_repository *,
1928     got_repo_import_cb progress_cb, void *progress_arg);
1929 
1930 static const struct got_error *
1931 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1932     const char *path, struct got_pathlist_head *ignores,
1933     struct got_repository *repo,
1934     got_repo_import_cb progress_cb, void *progress_arg)
1935 {
1936 	const struct got_error *err;
1937 	struct got_object_id *id = NULL;
1938 	char *subdirpath;
1939 
1940 	if (asprintf(&subdirpath, "%s%s%s", path,
1941 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1942 		return got_error_from_errno("asprintf");
1943 
1944 	(*new_te) = calloc(1, sizeof(**new_te));
1945 	if (*new_te == NULL)
1946 		return got_error_from_errno("calloc");
1947 	(*new_te)->mode = S_IFDIR;
1948 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1949 	    sizeof((*new_te)->name)) {
1950 		err = got_error(GOT_ERR_NO_SPACE);
1951 		goto done;
1952 	}
1953 	err = write_tree(&id, subdirpath, ignores,  repo,
1954 	    progress_cb, progress_arg);
1955 	if (err)
1956 		goto done;
1957 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1958 	
1959 done:
1960 	free(id);
1961 	free(subdirpath);
1962 	if (err) {
1963 		free(*new_te);
1964 		*new_te = NULL;
1965 	}
1966 	return err;
1967 }
1968 
1969 static const struct got_error *
1970 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1971     struct got_pathlist_head *ignores, struct got_repository *repo,
1972     got_repo_import_cb progress_cb, void *progress_arg)
1973 {
1974 	const struct got_error *err = NULL;
1975 	DIR *dir;
1976 	struct dirent *de;
1977 	int nentries;
1978 	struct got_tree_entry *new_te = NULL;
1979 	struct got_pathlist_head paths;
1980 	struct got_pathlist_entry *pe;
1981 
1982 	*new_tree_id = NULL;
1983 
1984 	TAILQ_INIT(&paths);
1985 
1986 	dir = opendir(path_dir);
1987 	if (dir == NULL) {
1988 		err = got_error_from_errno2("opendir", path_dir);
1989 		goto done;
1990 	}
1991 
1992 	nentries = 0;
1993 	while ((de = readdir(dir)) != NULL) {
1994 		int ignore = 0;
1995 		int type;
1996 
1997 		if (strcmp(de->d_name, ".") == 0 ||
1998 		    strcmp(de->d_name, "..") == 0)
1999 			continue;
2000 
2001 		TAILQ_FOREACH(pe, ignores, entry) {
2002 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
2003 				ignore = 1;
2004 				break;
2005 			}
2006 		}
2007 		if (ignore)
2008 			continue;
2009 
2010 		err = got_path_dirent_type(&type, path_dir, de);
2011 		if (err)
2012 			goto done;
2013 
2014 		if (type == DT_DIR) {
2015 			err = import_subdir(&new_te, de, path_dir,
2016 			    ignores, repo, progress_cb, progress_arg);
2017 			if (err) {
2018 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
2019 					goto done;
2020 				err = NULL;
2021 				continue;
2022 			}
2023 		} else if (type == DT_REG || type == DT_LNK) {
2024 			err = import_file(&new_te, de, path_dir, repo);
2025 			if (err)
2026 				goto done;
2027 		} else
2028 			continue;
2029 
2030 		err = insert_tree_entry(new_te, &paths);
2031 		if (err)
2032 			goto done;
2033 		nentries++;
2034 	}
2035 
2036 	if (TAILQ_EMPTY(&paths)) {
2037 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
2038 		    "cannot create tree without any entries");
2039 		goto done;
2040 	}
2041 
2042 	TAILQ_FOREACH(pe, &paths, entry) {
2043 		struct got_tree_entry *te = pe->data;
2044 		char *path;
2045 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
2046 			continue;
2047 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
2048 			err = got_error_from_errno("asprintf");
2049 			goto done;
2050 		}
2051 		err = (*progress_cb)(progress_arg, path);
2052 		free(path);
2053 		if (err)
2054 			goto done;
2055 	}
2056 
2057 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
2058 done:
2059 	if (dir)
2060 		closedir(dir);
2061 	got_pathlist_free(&paths);
2062 	return err;
2063 }
2064 
2065 const struct got_error *
2066 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
2067     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
2068     struct got_repository *repo, got_repo_import_cb progress_cb,
2069     void *progress_arg)
2070 {
2071 	const struct got_error *err;
2072 	struct got_object_id *new_tree_id;
2073 
2074 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
2075 	    progress_cb, progress_arg);
2076 	if (err)
2077 		return err;
2078 
2079 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
2080 	    author, time(NULL), author, time(NULL), logmsg, repo);
2081 	free(new_tree_id);
2082 	return err;
2083 }
2084 
2085 const struct got_error *
2086 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
2087     struct got_repository *repo)
2088 {
2089 	const struct got_error *err = NULL;
2090 	char *path_objects = NULL, *path = NULL;
2091 	DIR *dir = NULL;
2092 	struct got_object_id id;
2093 	int i;
2094 
2095 	*nobjects = 0;
2096 	*ondisk_size = 0;
2097 
2098 	path_objects = got_repo_get_path_objects(repo);
2099 	if (path_objects == NULL)
2100 		return got_error_from_errno("got_repo_get_path_objects");
2101 
2102 	for (i = 0; i <= 0xff; i++) {
2103 		struct dirent *dent;
2104 
2105 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
2106 			err = got_error_from_errno("asprintf");
2107 			break;
2108 		}
2109 
2110 		dir = opendir(path);
2111 		if (dir == NULL) {
2112 			if (errno == ENOENT) {
2113 				err = NULL;
2114 				continue;
2115 			}
2116 			err = got_error_from_errno2("opendir", path);
2117 			break;
2118 		}
2119 
2120 		while ((dent = readdir(dir)) != NULL) {
2121 			char *id_str;
2122 			int fd;
2123 			struct stat sb;
2124 
2125 			if (strcmp(dent->d_name, ".") == 0 ||
2126 			    strcmp(dent->d_name, "..") == 0)
2127 				continue;
2128 
2129 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
2130 				err = got_error_from_errno("asprintf");
2131 				goto done;
2132 			}
2133 
2134 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
2135 				free(id_str);
2136 				continue;
2137 			}
2138 			free(id_str);
2139 
2140 			err = got_object_open_loose_fd(&fd, &id, repo);
2141 			if (err)
2142 				goto done;
2143 
2144 			if (fstat(fd, &sb) == -1) {
2145 				err = got_error_from_errno("fstat");
2146 				close(fd);
2147 				goto done;
2148 			}
2149 			(*nobjects)++;
2150 			(*ondisk_size) += sb.st_size;
2151 
2152 			if (close(fd) == -1) {
2153 				err = got_error_from_errno("close");
2154 				goto done;
2155 			}
2156 		}
2157 
2158 		if (closedir(dir) != 0) {
2159 			err = got_error_from_errno("closedir");
2160 			goto done;
2161 		}
2162 		dir = NULL;
2163 
2164 		free(path);
2165 		path = NULL;
2166 	}
2167 done:
2168 	if (dir && closedir(dir) != 0 && err == NULL)
2169 		err = got_error_from_errno("closedir");
2170 
2171 	if (err) {
2172 		*nobjects = 0;
2173 		*ondisk_size = 0;
2174 	}
2175 	free(path_objects);
2176 	free(path);
2177 	return err;
2178 }
2179 
2180 const struct got_error *
2181 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
2182     off_t *total_packsize, struct got_repository *repo)
2183 {
2184 	const struct got_error *err = NULL;
2185 	DIR *packdir = NULL;
2186 	struct dirent *dent;
2187 	struct got_packidx *packidx = NULL;
2188 	char *path_packidx;
2189 	char *path_packfile;
2190 	int packdir_fd;
2191 	struct stat sb;
2192 
2193 	*npackfiles = 0;
2194 	*nobjects = 0;
2195 	*total_packsize = 0;
2196 
2197 	packdir_fd = openat(got_repo_get_fd(repo),
2198 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
2199 	if (packdir_fd == -1) {
2200 		return got_error_from_errno_fmt("openat: %s/%s",
2201 		    got_repo_get_path_git_dir(repo),
2202 		    GOT_OBJECTS_PACK_DIR);
2203 	}
2204 
2205 	packdir = fdopendir(packdir_fd);
2206 	if (packdir == NULL) {
2207 		err = got_error_from_errno("fdopendir");
2208 		goto done;
2209 	}
2210 
2211 	while ((dent = readdir(packdir)) != NULL) {
2212 		if (!got_repo_is_packidx_filename(dent->d_name,
2213 		    strlen(dent->d_name)))
2214 			continue;
2215 
2216 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
2217 		    dent->d_name) == -1) {
2218 			err = got_error_from_errno("asprintf");
2219 			goto done;
2220 		}
2221 
2222 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
2223 		    path_packidx, 0);
2224 		free(path_packidx);
2225 		if (err)
2226 			goto done;
2227 
2228 		if (fstat(packidx->fd, &sb) == -1)
2229 			goto done;
2230 		*total_packsize += sb.st_size;
2231 
2232 		err = got_packidx_get_packfile_path(&path_packfile,
2233 		    packidx->path_packidx);
2234 		if (err)
2235 			goto done;
2236 
2237 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
2238 		    0) == -1) {
2239 			free(path_packfile);
2240 			goto done;
2241 		}
2242 		free(path_packfile);
2243 		*total_packsize += sb.st_size;
2244 
2245 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
2246 
2247 		(*npackfiles)++;
2248 
2249 		got_packidx_close(packidx);
2250 		packidx = NULL;
2251 	}
2252 done:
2253 	if (packidx)
2254 		got_packidx_close(packidx);
2255 	if (packdir && closedir(packdir) != 0 && err == NULL)
2256 		err = got_error_from_errno("closedir");
2257 	if (err) {
2258 		*npackfiles = 0;
2259 		*nobjects = 0;
2260 		*total_packsize = 0;
2261 	}
2262 	return err;
2263 }
2264 
2265 RB_GENERATE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
2266     got_packidx_bloom_filter_cmp);