Got Mirror

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Date:: Sat Apr 10 13:31:30 2021 UTC
Message:: introduce 'gotadmin info'
Actions:: History | Blame | Raw File
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/resource.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 #include "got_lib_gotconfig.h"
64 
65 #ifndef nitems
66 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
67 #endif
68 
69 const char *
70 got_repo_get_path(struct got_repository *repo)
71 {
72 	return repo->path;
73 }
74 
75 const char *
76 got_repo_get_path_git_dir(struct got_repository *repo)
77 {
78 	return repo->path_git_dir;
79 }
80 
81 int
82 got_repo_get_fd(struct got_repository *repo)
83 {
84 	return repo->gitdir_fd;
85 }
86 
87 const char *
88 got_repo_get_gitconfig_author_name(struct got_repository *repo)
89 {
90 	return repo->gitconfig_author_name;
91 }
92 
93 const char *
94 got_repo_get_gitconfig_author_email(struct got_repository *repo)
95 {
96 	return repo->gitconfig_author_email;
97 }
98 
99 const char *
100 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
101 {
102 	return repo->global_gitconfig_author_name;
103 }
104 
105 const char *
106 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
107 {
108 	return repo->global_gitconfig_author_email;
109 }
110 
111 const char *
112 got_repo_get_gitconfig_owner(struct got_repository *repo)
113 {
114 	return repo->gitconfig_owner;
115 }
116 
117 int
118 got_repo_is_bare(struct got_repository *repo)
119 {
120 	return (strcmp(repo->path, repo->path_git_dir) == 0);
121 }
122 
123 static char *
124 get_path_git_child(struct got_repository *repo, const char *basename)
125 {
126 	char *path_child;
127 
128 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
129 	    basename) == -1)
130 		return NULL;
131 
132 	return path_child;
133 }
134 
135 char *
136 got_repo_get_path_objects(struct got_repository *repo)
137 {
138 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
139 }
140 
141 char *
142 got_repo_get_path_objects_pack(struct got_repository *repo)
143 {
144 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
145 }
146 
147 char *
148 got_repo_get_path_refs(struct got_repository *repo)
149 {
150 	return get_path_git_child(repo, GOT_REFS_DIR);
151 }
152 
153 char *
154 got_repo_get_path_packed_refs(struct got_repository *repo)
155 {
156 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
157 }
158 
159 static char *
160 get_path_head(struct got_repository *repo)
161 {
162 	return get_path_git_child(repo, GOT_HEAD_FILE);
163 }
164 
165 char *
166 got_repo_get_path_gitconfig(struct got_repository *repo)
167 {
168 	return get_path_git_child(repo, GOT_GITCONFIG);
169 }
170 
171 char *
172 got_repo_get_path_gotconfig(struct got_repository *repo)
173 {
174 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
175 }
176 
177 const struct got_gotconfig *
178 got_repo_get_gotconfig(struct got_repository *repo)
179 {
180 	return repo->gotconfig;
181 }
182 
183 void
184 got_repo_get_gitconfig_remotes(int *nremotes,
185     const struct got_remote_repo **remotes, struct got_repository *repo)
186 {
187 	*nremotes = repo->ngitconfig_remotes;
188 	*remotes = repo->gitconfig_remotes;
189 }
190 
191 static int
192 is_git_repo(struct got_repository *repo)
193 {
194 	const char *path_git = got_repo_get_path_git_dir(repo);
195 	char *path_objects = got_repo_get_path_objects(repo);
196 	char *path_refs = got_repo_get_path_refs(repo);
197 	char *path_head = get_path_head(repo);
198 	int ret = 0;
199 	struct stat sb;
200 	struct got_reference *head_ref;
201 
202 	if (lstat(path_git, &sb) == -1)
203 		goto done;
204 	if (!S_ISDIR(sb.st_mode))
205 		goto done;
206 
207 	if (lstat(path_objects, &sb) == -1)
208 		goto done;
209 	if (!S_ISDIR(sb.st_mode))
210 		goto done;
211 
212 	if (lstat(path_refs, &sb) == -1)
213 		goto done;
214 	if (!S_ISDIR(sb.st_mode))
215 		goto done;
216 
217 	if (lstat(path_head, &sb) == -1)
218 		goto done;
219 	if (!S_ISREG(sb.st_mode))
220 		goto done;
221 
222 	/* Check if the HEAD reference can be opened. */
223 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
224 		goto done;
225 	got_ref_close(head_ref);
226 
227 	ret = 1;
228 done:
229 	free(path_objects);
230 	free(path_refs);
231 	free(path_head);
232 	return ret;
233 
234 }
235 
236 const struct got_error *
237 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
238     struct got_object *obj)
239 {
240 #ifndef GOT_NO_OBJ_CACHE
241 	const struct got_error *err = NULL;
242 	err = got_object_cache_add(&repo->objcache, id, obj);
243 	if (err) {
244 		if (err->code == GOT_ERR_OBJ_EXISTS ||
245 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
246 			err = NULL;
247 		return err;
248 	}
249 	obj->refcnt++;
250 #endif
251 	return NULL;
252 }
253 
254 struct got_object *
255 got_repo_get_cached_object(struct got_repository *repo,
256     struct got_object_id *id)
257 {
258 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
259 }
260 
261 const struct got_error *
262 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
263     struct got_tree_object *tree)
264 {
265 #ifndef GOT_NO_OBJ_CACHE
266 	const struct got_error *err = NULL;
267 	err = got_object_cache_add(&repo->treecache, id, tree);
268 	if (err) {
269 		if (err->code == GOT_ERR_OBJ_EXISTS ||
270 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
271 			err = NULL;
272 		return err;
273 	}
274 	tree->refcnt++;
275 #endif
276 	return NULL;
277 }
278 
279 struct got_tree_object *
280 got_repo_get_cached_tree(struct got_repository *repo,
281     struct got_object_id *id)
282 {
283 	return (struct got_tree_object *)got_object_cache_get(
284 	    &repo->treecache, id);
285 }
286 
287 const struct got_error *
288 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
289     struct got_commit_object *commit)
290 {
291 #ifndef GOT_NO_OBJ_CACHE
292 	const struct got_error *err = NULL;
293 	err = got_object_cache_add(&repo->commitcache, id, commit);
294 	if (err) {
295 		if (err->code == GOT_ERR_OBJ_EXISTS ||
296 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
297 			err = NULL;
298 		return err;
299 	}
300 	commit->refcnt++;
301 #endif
302 	return NULL;
303 }
304 
305 struct got_commit_object *
306 got_repo_get_cached_commit(struct got_repository *repo,
307     struct got_object_id *id)
308 {
309 	return (struct got_commit_object *)got_object_cache_get(
310 	    &repo->commitcache, id);
311 }
312 
313 const struct got_error *
314 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
315     struct got_tag_object *tag)
316 {
317 #ifndef GOT_NO_OBJ_CACHE
318 	const struct got_error *err = NULL;
319 	err = got_object_cache_add(&repo->tagcache, id, tag);
320 	if (err) {
321 		if (err->code == GOT_ERR_OBJ_EXISTS ||
322 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
323 			err = NULL;
324 		return err;
325 	}
326 	tag->refcnt++;
327 #endif
328 	return NULL;
329 }
330 
331 struct got_tag_object *
332 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
333 {
334 	return (struct got_tag_object *)got_object_cache_get(
335 	    &repo->tagcache, id);
336 }
337 
338 const struct got_error *
339 open_repo(struct got_repository *repo, const char *path)
340 {
341 	const struct got_error *err = NULL;
342 
343 	repo->gitdir_fd = -1;
344 
345 	/* bare git repository? */
346 	repo->path_git_dir = strdup(path);
347 	if (repo->path_git_dir == NULL)
348 		return got_error_from_errno("strdup");
349 	if (is_git_repo(repo)) {
350 		repo->path = strdup(repo->path_git_dir);
351 		if (repo->path == NULL) {
352 			err = got_error_from_errno("strdup");
353 			goto done;
354 		}
355 		repo->gitdir_fd = open(repo->path_git_dir, O_DIRECTORY);
356 		if (repo->gitdir_fd == -1) {
357 			err = got_error_from_errno2("open",
358 			    repo->path_git_dir);
359 			goto done;
360 		}
361 		return NULL;
362 	}
363 
364 	/* git repository with working tree? */
365 	free(repo->path_git_dir);
366 	repo->path_git_dir = NULL;
367 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
368 		err = got_error_from_errno("asprintf");
369 		goto done;
370 	}
371 	if (is_git_repo(repo)) {
372 		repo->path = strdup(path);
373 		if (repo->path == NULL) {
374 			err = got_error_from_errno("strdup");
375 			goto done;
376 		}
377 		repo->gitdir_fd = open(repo->path_git_dir, O_DIRECTORY);
378 		if (repo->gitdir_fd == -1) {
379 			err = got_error_from_errno2("open",
380 			    repo->path_git_dir);
381 			goto done;
382 		}
383 		return NULL;
384 	}
385 
386 	err = got_error(GOT_ERR_NOT_GIT_REPO);
387 done:
388 	if (err) {
389 		free(repo->path);
390 		repo->path = NULL;
391 		free(repo->path_git_dir);
392 		repo->path_git_dir = NULL;
393 		if (repo->gitdir_fd != -1)
394 			close(repo->gitdir_fd);
395 		repo->gitdir_fd = -1;
396 
397 	}
398 	return err;
399 }
400 
401 static const struct got_error *
402 parse_gitconfig_file(int *gitconfig_repository_format_version,
403     char **gitconfig_author_name, char **gitconfig_author_email,
404     struct got_remote_repo **remotes, int *nremotes,
405     char **gitconfig_owner, char ***extensions, int *nextensions,
406     const char *gitconfig_path)
407 {
408 	const struct got_error *err = NULL, *child_err = NULL;
409 	int fd = -1;
410 	int imsg_fds[2] = { -1, -1 };
411 	pid_t pid;
412 	struct imsgbuf *ibuf;
413 
414 	*gitconfig_repository_format_version = 0;
415 	if (extensions)
416 		*extensions = NULL;
417 	if (nextensions)
418 		*nextensions = 0;
419 	*gitconfig_author_name = NULL;
420 	*gitconfig_author_email = NULL;
421 	if (remotes)
422 		*remotes = NULL;
423 	if (nremotes)
424 		*nremotes = 0;
425 	if (gitconfig_owner)
426 		*gitconfig_owner = NULL;
427 
428 	fd = open(gitconfig_path, O_RDONLY);
429 	if (fd == -1) {
430 		if (errno == ENOENT)
431 			return NULL;
432 		return got_error_from_errno2("open", gitconfig_path);
433 	}
434 
435 	ibuf = calloc(1, sizeof(*ibuf));
436 	if (ibuf == NULL) {
437 		err = got_error_from_errno("calloc");
438 		goto done;
439 	}
440 
441 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
442 		err = got_error_from_errno("socketpair");
443 		goto done;
444 	}
445 
446 	pid = fork();
447 	if (pid == -1) {
448 		err = got_error_from_errno("fork");
449 		goto done;
450 	} else if (pid == 0) {
451 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
452 		    gitconfig_path);
453 		/* not reached */
454 	}
455 
456 	if (close(imsg_fds[1]) == -1) {
457 		err = got_error_from_errno("close");
458 		goto done;
459 	}
460 	imsg_fds[1] = -1;
461 	imsg_init(ibuf, imsg_fds[0]);
462 
463 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
464 	if (err)
465 		goto done;
466 	fd = -1;
467 
468 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
469 	if (err)
470 		goto done;
471 
472 	err = got_privsep_recv_gitconfig_int(
473 	    gitconfig_repository_format_version, ibuf);
474 	if (err)
475 		goto done;
476 
477 	if (extensions && nextensions) {
478 		err = got_privsep_send_gitconfig_repository_extensions_req(
479 		    ibuf);
480 		if (err)
481 			goto done;
482 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
483 		if (err)
484 			goto done;
485 		if (*nextensions > 0) {
486 			int i;
487 			*extensions = calloc(*nextensions, sizeof(char *));
488 			if (*extensions == NULL) {
489 				err = got_error_from_errno("calloc");
490 				goto done;
491 			}
492 			for (i = 0; i < *nextensions; i++) {
493 				char *ext;
494 				err = got_privsep_recv_gitconfig_str(&ext,
495 				    ibuf);
496 				if (err)
497 					goto done;
498 				(*extensions)[i] = ext;
499 			}
500 		}
501 	}
502 
503 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
504 	if (err)
505 		goto done;
506 
507 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
508 	if (err)
509 		goto done;
510 
511 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
512 	if (err)
513 		goto done;
514 
515 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
516 	if (err)
517 		goto done;
518 
519 	if (remotes && nremotes) {
520 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
521 		if (err)
522 			goto done;
523 
524 		err = got_privsep_recv_gitconfig_remotes(remotes,
525 		    nremotes, ibuf);
526 		if (err)
527 			goto done;
528 	}
529 
530 	if (gitconfig_owner) {
531 		err = got_privsep_send_gitconfig_owner_req(ibuf);
532 		if (err)
533 			goto done;
534 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
535 		if (err)
536 			goto done;
537 	}
538 
539 	imsg_clear(ibuf);
540 	err = got_privsep_send_stop(imsg_fds[0]);
541 	child_err = got_privsep_wait_for_child(pid);
542 	if (child_err && err == NULL)
543 		err = child_err;
544 done:
545 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
546 		err = got_error_from_errno("close");
547 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
548 		err = got_error_from_errno("close");
549 	if (fd != -1 && close(fd) == -1 && err == NULL)
550 		err = got_error_from_errno2("close", gitconfig_path);
551 	free(ibuf);
552 	return err;
553 }
554 
555 static const struct got_error *
556 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
557 {
558 	const struct got_error *err = NULL;
559 	char *repo_gitconfig_path = NULL;
560 
561 	if (global_gitconfig_path) {
562 		/* Read settings from ~/.gitconfig. */
563 		int dummy_repo_version;
564 		err = parse_gitconfig_file(&dummy_repo_version,
565 		    &repo->global_gitconfig_author_name,
566 		    &repo->global_gitconfig_author_email,
567 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
568 		if (err)
569 			return err;
570 	}
571 
572 	/* Read repository's .git/config file. */
573 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
574 	if (repo_gitconfig_path == NULL)
575 		return got_error_from_errno("got_repo_get_path_gitconfig");
576 
577 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
578 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
579 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
580 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
581 	    repo_gitconfig_path);
582 	if (err)
583 		goto done;
584 done:
585 	free(repo_gitconfig_path);
586 	return err;
587 }
588 
589 static const struct got_error *
590 read_gotconfig(struct got_repository *repo)
591 {
592 	const struct got_error *err = NULL;
593 	char *gotconfig_path;
594 
595 	gotconfig_path = got_repo_get_path_gotconfig(repo);
596 	if (gotconfig_path == NULL)
597 		return got_error_from_errno("got_repo_get_path_gotconfig");
598 
599 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
600 	free(gotconfig_path);
601 	return err;
602 }
603 
604 /* Supported repository format extensions. */
605 static const char *repo_extensions[] = {
606 	"noop",			/* Got supports repository format version 1. */
607 	"preciousObjects",	/* Got has no garbage collection yet. */
608 	"worktreeConfig",	/* Got does not care about Git work trees. */
609 };
610 
611 const struct got_error *
612 got_repo_open(struct got_repository **repop, const char *path,
613     const char *global_gitconfig_path)
614 {
615 	struct got_repository *repo = NULL;
616 	const struct got_error *err = NULL;
617 	char *repo_path = NULL;
618 	size_t i;
619 	struct rlimit rl;
620 
621 	*repop = NULL;
622 
623 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
624 		return got_error_from_errno("getrlimit");
625 
626 	repo = calloc(1, sizeof(*repo));
627 	if (repo == NULL) {
628 		err = got_error_from_errno("calloc");
629 		goto done;
630 	}
631 
632 	for (i = 0; i < nitems(repo->privsep_children); i++) {
633 		memset(&repo->privsep_children[i], 0,
634 		    sizeof(repo->privsep_children[0]));
635 		repo->privsep_children[i].imsg_fd = -1;
636 	}
637 
638 	err = got_object_cache_init(&repo->objcache,
639 	    GOT_OBJECT_CACHE_TYPE_OBJ);
640 	if (err)
641 		goto done;
642 	err = got_object_cache_init(&repo->treecache,
643 	    GOT_OBJECT_CACHE_TYPE_TREE);
644 	if (err)
645 		goto done;
646 	err = got_object_cache_init(&repo->commitcache,
647 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
648 	if (err)
649 		goto done;
650 	err = got_object_cache_init(&repo->tagcache,
651 	    GOT_OBJECT_CACHE_TYPE_TAG);
652 	if (err)
653 		goto done;
654 
655 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
656 	if (repo->pack_cache_size > rl.rlim_cur / 8)
657 		repo->pack_cache_size = rl.rlim_cur / 8;
658 
659 	repo_path = realpath(path, NULL);
660 	if (repo_path == NULL) {
661 		err = got_error_from_errno2("realpath", path);
662 		goto done;
663 	}
664 
665 	for (;;) {
666 		char *parent_path;
667 
668 		err = open_repo(repo, repo_path);
669 		if (err == NULL)
670 			break;
671 		if (err->code != GOT_ERR_NOT_GIT_REPO)
672 			goto done;
673 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
674 			err = got_error(GOT_ERR_NOT_GIT_REPO);
675 			goto done;
676 		}
677 		err = got_path_dirname(&parent_path, repo_path);
678 		if (err)
679 			goto done;
680 		free(repo_path);
681 		repo_path = parent_path;
682 	}
683 
684 	err = read_gotconfig(repo);
685 	if (err)
686 		goto done;
687 
688 	err = read_gitconfig(repo, global_gitconfig_path);
689 	if (err)
690 		goto done;
691 	if (repo->gitconfig_repository_format_version != 0)
692 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
693 	for (i = 0; i < repo->nextensions; i++) {
694 		char *ext = repo->extensions[i];
695 		int j, supported = 0;
696 		for (j = 0; j < nitems(repo_extensions); j++) {
697 			if (strcmp(ext, repo_extensions[j]) == 0) {
698 				supported = 1;
699 				break;
700 			}
701 		}
702 		if (!supported) {
703 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
704 			goto done;
705 		}
706 	}
707 done:
708 	if (err)
709 		got_repo_close(repo);
710 	else
711 		*repop = repo;
712 	free(repo_path);
713 	return err;
714 }
715 
716 const struct got_error *
717 got_repo_close(struct got_repository *repo)
718 {
719 	const struct got_error *err = NULL, *child_err;
720 	size_t i;
721 
722 	for (i = 0; i < repo->pack_cache_size; i++) {
723 		if (repo->packidx_cache[i] == NULL)
724 			break;
725 		got_packidx_close(repo->packidx_cache[i]);
726 	}
727 
728 	for (i = 0; i < repo->pack_cache_size; i++) {
729 		if (repo->packs[i].path_packfile == NULL)
730 			break;
731 		got_pack_close(&repo->packs[i]);
732 	}
733 
734 	free(repo->path);
735 	free(repo->path_git_dir);
736 
737 	got_object_cache_close(&repo->objcache);
738 	got_object_cache_close(&repo->treecache);
739 	got_object_cache_close(&repo->commitcache);
740 	got_object_cache_close(&repo->tagcache);
741 
742 	for (i = 0; i < nitems(repo->privsep_children); i++) {
743 		if (repo->privsep_children[i].imsg_fd == -1)
744 			continue;
745 		imsg_clear(repo->privsep_children[i].ibuf);
746 		free(repo->privsep_children[i].ibuf);
747 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
748 		child_err = got_privsep_wait_for_child(
749 		    repo->privsep_children[i].pid);
750 		if (child_err && err == NULL)
751 			err = child_err;
752 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
753 		    err == NULL)
754 			err = got_error_from_errno("close");
755 	}
756 
757 	if (repo->gotconfig)
758 		got_gotconfig_free(repo->gotconfig);
759 	free(repo->gitconfig_author_name);
760 	free(repo->gitconfig_author_email);
761 	for (i = 0; i < repo->ngitconfig_remotes; i++)
762 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
763 	free(repo->gitconfig_remotes);
764 	for (i = 0; i < repo->nextensions; i++)
765 		free(repo->extensions[i]);
766 	free(repo->extensions);
767 	free(repo);
768 
769 	return err;
770 }
771 
772 void
773 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
774 {
775 	int i;
776 
777 	free(repo->name);
778 	repo->name = NULL;
779 	free(repo->url);
780 	repo->url = NULL;
781 	for (i = 0; i < repo->nbranches; i++)
782 		free(repo->branches[i]);
783 	free(repo->branches);
784 	repo->branches = NULL;
785 	repo->nbranches = 0;
786 }
787 
788 const struct got_error *
789 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
790     const char *input_path)
791 {
792 	const struct got_error *err = NULL;
793 	const char *repo_abspath = NULL;
794 	size_t repolen, len;
795 	char *canonpath, *path = NULL;
796 
797 	*in_repo_path = NULL;
798 
799 	canonpath = strdup(input_path);
800 	if (canonpath == NULL) {
801 		err = got_error_from_errno("strdup");
802 		goto done;
803 	}
804 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
805 	if (err)
806 		goto done;
807 
808 	repo_abspath = got_repo_get_path(repo);
809 
810 	if (canonpath[0] == '\0') {
811 		path = strdup(canonpath);
812 		if (path == NULL) {
813 			err = got_error_from_errno("strdup");
814 			goto done;
815 		}
816 	} else {
817 		path = realpath(canonpath, NULL);
818 		if (path == NULL) {
819 			if (errno != ENOENT) {
820 				err = got_error_from_errno2("realpath",
821 				    canonpath);
822 				goto done;
823 			}
824 			/*
825 			 * Path is not on disk.
826 			 * Assume it is already relative to repository root.
827 			 */
828 			path = strdup(canonpath);
829 			if (path == NULL) {
830 				err = got_error_from_errno("strdup");
831 				goto done;
832 			}
833 		}
834 
835 		repolen = strlen(repo_abspath);
836 		len = strlen(path);
837 
838 
839 		if (strcmp(path, repo_abspath) == 0) {
840 			free(path);
841 			path = strdup("");
842 			if (path == NULL) {
843 				err = got_error_from_errno("strdup");
844 				goto done;
845 			}
846 		} else if (len > repolen &&
847 		    got_path_is_child(path, repo_abspath, repolen)) {
848 			/* Matched an on-disk path inside repository. */
849 			if (got_repo_is_bare(repo)) {
850 				/*
851 				 * Matched an on-disk path inside repository
852 				 * database. Treat input as repository-relative.
853 				 */
854 				 free(path);
855 				 path = canonpath;
856 				 canonpath = NULL;
857 			} else {
858 				char *child;
859 				/* Strip common prefix with repository path. */
860 				err = got_path_skip_common_ancestor(&child,
861 				    repo_abspath, path);
862 				if (err)
863 					goto done;
864 				free(path);
865 				path = child;
866 			}
867 		} else {
868 			/*
869 			 * Matched unrelated on-disk path.
870 			 * Treat input as repository-relative.
871 			 */
872 			 free(path);
873 			 path = canonpath;
874 			 canonpath = NULL;
875 		}
876 	}
877 
878 	/* Make in-repository path absolute */
879 	if (path[0] != '/') {
880 		char *abspath;
881 		if (asprintf(&abspath, "/%s", path) == -1) {
882 			err = got_error_from_errno("asprintf");
883 			goto done;
884 		}
885 		free(path);
886 		path = abspath;
887 	}
888 
889 done:
890 	free(canonpath);
891 	if (err)
892 		free(path);
893 	else
894 		*in_repo_path = path;
895 	return err;
896 }
897 
898 static const struct got_error *
899 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
900     const char *path_packidx)
901 {
902 	const struct got_error *err = NULL;
903 	size_t i;
904 
905 	for (i = 0; i < repo->pack_cache_size; i++) {
906 		if (repo->packidx_cache[i] == NULL)
907 			break;
908 		if (strcmp(repo->packidx_cache[i]->path_packidx,
909 		    path_packidx) == 0) {
910 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
911 		}
912 	}
913 	if (i == repo->pack_cache_size) {
914 		err = got_packidx_close(repo->packidx_cache[i - 1]);
915 		if (err)
916 			return err;
917 	}
918 
919 	/*
920 	 * Insert the new pack index at the front so it will
921 	 * be searched first in the future.
922 	 */
923 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
924 	    sizeof(repo->packidx_cache) -
925 	    sizeof(repo->packidx_cache[0]));
926 	repo->packidx_cache[0] = packidx;
927 
928 	return NULL;
929 }
930 
931 static int
932 is_packidx_filename(const char *name, size_t len)
933 {
934 	if (len != GOT_PACKIDX_NAMELEN)
935 		return 0;
936 
937 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
938 		return 0;
939 
940 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
941 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
942 		return 0;
943 
944 	return 1;
945 }
946 
947 const struct got_error *
948 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
949     struct got_repository *repo, struct got_object_id *id)
950 {
951 	const struct got_error *err;
952 	DIR *packdir = NULL;
953 	struct dirent *dent;
954 	char *path_packidx;
955 	size_t i;
956 	int packdir_fd;
957 
958 	/* Search pack index cache. */
959 	for (i = 0; i < repo->pack_cache_size; i++) {
960 		if (repo->packidx_cache[i] == NULL)
961 			break;
962 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
963 		if (*idx != -1) {
964 			*packidx = repo->packidx_cache[i];
965 			/*
966 			 * Move this cache entry to the front. Repeatedly
967 			 * searching a wrong pack index can be expensive.
968 			 */
969 			if (i > 0) {
970 				struct got_packidx *p;
971 				p = repo->packidx_cache[0];
972 				repo->packidx_cache[0] = *packidx;
973 				repo->packidx_cache[i] = p;
974 			}
975 			return NULL;
976 		}
977 	}
978 	/* No luck. Search the filesystem. */
979 
980 	packdir_fd = openat(got_repo_get_fd(repo),
981 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
982 	if (packdir_fd == -1) {
983 		if (errno == ENOENT)
984 			err = got_error_no_obj(id);
985 		else
986 			err = got_error_from_errno_fmt("openat: %s/%s",
987 			    got_repo_get_path_git_dir(repo),
988 			    GOT_OBJECTS_PACK_DIR);
989 		goto done;
990 	}
991 
992 	packdir = fdopendir(packdir_fd);
993 	if (packdir == NULL) {
994 		err = got_error_from_errno("fdopendir");
995 		goto done;
996 	}
997 
998 	while ((dent = readdir(packdir)) != NULL) {
999 		int is_cached = 0;
1000 
1001 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1002 			continue;
1003 
1004 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1005 		    dent->d_name) == -1) {
1006 			err = got_error_from_errno("asprintf");
1007 			goto done;
1008 		}
1009 
1010 		for (i = 0; i < repo->pack_cache_size; i++) {
1011 			if (repo->packidx_cache[i] == NULL)
1012 				break;
1013 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1014 			    path_packidx) == 0) {
1015 				is_cached = 1;
1016 				break;
1017 			}
1018 		}
1019 		if (is_cached) {
1020 			free(path_packidx);
1021 			continue; /* already searched */
1022 		}
1023 
1024 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1025 		    path_packidx, 0);
1026 		if (err) {
1027 			free(path_packidx);
1028 			goto done;
1029 		}
1030 
1031 		err = cache_packidx(repo, *packidx, path_packidx);
1032 		free(path_packidx);
1033 		if (err)
1034 			goto done;
1035 
1036 		*idx = got_packidx_get_object_idx(*packidx, id);
1037 		if (*idx != -1) {
1038 			err = NULL; /* found the object */
1039 			goto done;
1040 		}
1041 	}
1042 
1043 	err = got_error_no_obj(id);
1044 done:
1045 	if (packdir && closedir(packdir) != 0 && err == NULL)
1046 		err = got_error_from_errno("closedir");
1047 	return err;
1048 }
1049 
1050 static const struct got_error *
1051 read_packfile_hdr(int fd, struct got_packidx *packidx)
1052 {
1053 	const struct got_error *err = NULL;
1054 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1055 	struct got_packfile_hdr hdr;
1056 	ssize_t n;
1057 
1058 	n = read(fd, &hdr, sizeof(hdr));
1059 	if (n < 0)
1060 		return got_error_from_errno("read");
1061 	if (n != sizeof(hdr))
1062 		return got_error(GOT_ERR_BAD_PACKFILE);
1063 
1064 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1065 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1066 	    be32toh(hdr.nobjects) != totobj)
1067 		err = got_error(GOT_ERR_BAD_PACKFILE);
1068 
1069 	return err;
1070 }
1071 
1072 static const struct got_error *
1073 open_packfile(int *fd, struct got_repository *repo,
1074     const char *relpath, struct got_packidx *packidx)
1075 {
1076 	const struct got_error *err = NULL;
1077 
1078 	*fd = openat(got_repo_get_fd(repo), relpath, O_RDONLY | O_NOFOLLOW);
1079 	if (*fd == -1)
1080 		return got_error_from_errno_fmt("openat: %s/%s",
1081 		    got_repo_get_path_git_dir(repo), relpath);
1082 
1083 	if (packidx) {
1084 		err = read_packfile_hdr(*fd, packidx);
1085 		if (err) {
1086 			close(*fd);
1087 			*fd = -1;
1088 		}
1089 	}
1090 
1091 	return err;
1092 }
1093 
1094 const struct got_error *
1095 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1096     const char *path_packfile, struct got_packidx *packidx)
1097 {
1098 	const struct got_error *err = NULL;
1099 	struct got_pack *pack = NULL;
1100 	struct stat sb;
1101 	size_t i;
1102 
1103 	if (packp)
1104 		*packp = NULL;
1105 
1106 	for (i = 0; i < repo->pack_cache_size; i++) {
1107 		pack = &repo->packs[i];
1108 		if (pack->path_packfile == NULL)
1109 			break;
1110 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1111 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1112 	}
1113 
1114 	if (i == repo->pack_cache_size) {
1115 		err = got_pack_close(&repo->packs[i - 1]);
1116 		if (err)
1117 			return err;
1118 		memmove(&repo->packs[1], &repo->packs[0],
1119 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1120 		i = 0;
1121 	}
1122 
1123 	pack = &repo->packs[i];
1124 
1125 	pack->path_packfile = strdup(path_packfile);
1126 	if (pack->path_packfile == NULL) {
1127 		err = got_error_from_errno("strdup");
1128 		goto done;
1129 	}
1130 
1131 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1132 	if (err)
1133 		goto done;
1134 
1135 	if (fstat(pack->fd, &sb) != 0) {
1136 		err = got_error_from_errno("fstat");
1137 		goto done;
1138 	}
1139 	pack->filesize = sb.st_size;
1140 
1141 	pack->privsep_child = NULL;
1142 
1143 #ifndef GOT_PACK_NO_MMAP
1144 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1145 	    pack->fd, 0);
1146 	if (pack->map == MAP_FAILED) {
1147 		if (errno != ENOMEM) {
1148 			err = got_error_from_errno("mmap");
1149 			goto done;
1150 		}
1151 		pack->map = NULL; /* fall back to read(2) */
1152 	}
1153 #endif
1154 done:
1155 	if (err) {
1156 		if (pack) {
1157 			free(pack->path_packfile);
1158 			memset(pack, 0, sizeof(*pack));
1159 		}
1160 	} else if (packp)
1161 		*packp = pack;
1162 	return err;
1163 }
1164 
1165 struct got_pack *
1166 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1167 {
1168 	struct got_pack *pack = NULL;
1169 	size_t i;
1170 
1171 	for (i = 0; i < repo->pack_cache_size; i++) {
1172 		pack = &repo->packs[i];
1173 		if (pack->path_packfile == NULL)
1174 			break;
1175 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1176 			return pack;
1177 	}
1178 
1179 	return NULL;
1180 }
1181 
1182 const struct got_error *
1183 got_repo_init(const char *repo_path)
1184 {
1185 	const struct got_error *err = NULL;
1186 	const char *dirnames[] = {
1187 		GOT_OBJECTS_DIR,
1188 		GOT_OBJECTS_PACK_DIR,
1189 		GOT_REFS_DIR,
1190 	};
1191 	const char *description_str = "Unnamed repository; "
1192 	    "edit this file 'description' to name the repository.";
1193 	const char *headref_str = "ref: refs/heads/main";
1194 	const char *gitconfig_str = "[core]\n"
1195 	    "\trepositoryformatversion = 0\n"
1196 	    "\tfilemode = true\n"
1197 	    "\tbare = true\n";
1198 	char *path;
1199 	size_t i;
1200 
1201 	if (!got_path_dir_is_empty(repo_path))
1202 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1203 
1204 	for (i = 0; i < nitems(dirnames); i++) {
1205 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1206 			return got_error_from_errno("asprintf");
1207 		}
1208 		err = got_path_mkdir(path);
1209 		free(path);
1210 		if (err)
1211 			return err;
1212 	}
1213 
1214 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1215 		return got_error_from_errno("asprintf");
1216 	err = got_path_create_file(path, description_str);
1217 	free(path);
1218 	if (err)
1219 		return err;
1220 
1221 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1222 		return got_error_from_errno("asprintf");
1223 	err = got_path_create_file(path, headref_str);
1224 	free(path);
1225 	if (err)
1226 		return err;
1227 
1228 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1229 		return got_error_from_errno("asprintf");
1230 	err = got_path_create_file(path, gitconfig_str);
1231 	free(path);
1232 	if (err)
1233 		return err;
1234 
1235 	return NULL;
1236 }
1237 
1238 static const struct got_error *
1239 match_packed_object(struct got_object_id **unique_id,
1240     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1241 {
1242 	const struct got_error *err = NULL;
1243 	DIR *packdir = NULL;
1244 	struct dirent *dent;
1245 	char *path_packidx;
1246 	struct got_object_id_queue matched_ids;
1247 	int packdir_fd;
1248 
1249 	SIMPLEQ_INIT(&matched_ids);
1250 
1251 	packdir_fd = openat(got_repo_get_fd(repo),
1252 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1253 	if (packdir_fd == -1) {
1254 		if (errno != ENOENT)
1255 			err = got_error_from_errno2("openat", GOT_OBJECTS_PACK_DIR);
1256 		goto done;
1257 	}
1258 
1259 	packdir = fdopendir(packdir_fd);
1260 	if (packdir == NULL) {
1261 		err = got_error_from_errno("fdopendir");
1262 		goto done;
1263 	}
1264 
1265 	while ((dent = readdir(packdir)) != NULL) {
1266 		struct got_packidx *packidx;
1267 		struct got_object_qid *qid;
1268 
1269 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1270 			continue;
1271 
1272 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1273 		    dent->d_name) == -1) {
1274 			err = got_error_from_errno("strdup");
1275 			break;
1276 		}
1277 
1278 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1279 		    path_packidx, 0);
1280 		free(path_packidx);
1281 		if (err)
1282 			break;
1283 
1284 		err = got_packidx_match_id_str_prefix(&matched_ids,
1285 		    packidx, id_str_prefix);
1286 		if (err) {
1287 			got_packidx_close(packidx);
1288 			break;
1289 		}
1290 		err = got_packidx_close(packidx);
1291 		if (err)
1292 			break;
1293 
1294 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1295 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1296 				int matched_type;
1297 				err = got_object_get_type(&matched_type, repo,
1298 				    qid->id);
1299 				if (err)
1300 					goto done;
1301 				if (matched_type != obj_type)
1302 					continue;
1303 			}
1304 			if (*unique_id == NULL) {
1305 				*unique_id = got_object_id_dup(qid->id);
1306 				if (*unique_id == NULL) {
1307 					err = got_error_from_errno("malloc");
1308 					goto done;
1309 				}
1310 			} else {
1311 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1312 					continue; /* packed multiple times */
1313 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1314 				goto done;
1315 			}
1316 		}
1317 	}
1318 done:
1319 	got_object_id_queue_free(&matched_ids);
1320 	if (packdir && closedir(packdir) != 0 && err == NULL)
1321 		err = got_error_from_errno("closedir");
1322 	if (err) {
1323 		free(*unique_id);
1324 		*unique_id = NULL;
1325 	}
1326 	return err;
1327 }
1328 
1329 static const struct got_error *
1330 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1331     const char *object_dir, const char *id_str_prefix, int obj_type,
1332     struct got_repository *repo)
1333 {
1334 	const struct got_error *err = NULL;
1335 	char *path;
1336 	DIR *dir = NULL;
1337 	struct dirent *dent;
1338 	struct got_object_id id;
1339 
1340 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1341 		err = got_error_from_errno("asprintf");
1342 		goto done;
1343 	}
1344 
1345 	dir = opendir(path);
1346 	if (dir == NULL) {
1347 		if (errno == ENOENT) {
1348 			err = NULL;
1349 			goto done;
1350 		}
1351 		err = got_error_from_errno2("opendir", path);
1352 		goto done;
1353 	}
1354 	while ((dent = readdir(dir)) != NULL) {
1355 		char *id_str;
1356 		int cmp;
1357 
1358 		if (strcmp(dent->d_name, ".") == 0 ||
1359 		    strcmp(dent->d_name, "..") == 0)
1360 			continue;
1361 
1362 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1363 			err = got_error_from_errno("asprintf");
1364 			goto done;
1365 		}
1366 
1367 		if (!got_parse_sha1_digest(id.sha1, id_str))
1368 			continue;
1369 
1370 		/*
1371 		 * Directory entries do not necessarily appear in
1372 		 * sorted order, so we must iterate over all of them.
1373 		 */
1374 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1375 		if (cmp != 0) {
1376 			free(id_str);
1377 			continue;
1378 		}
1379 
1380 		if (*unique_id == NULL) {
1381 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1382 				int matched_type;
1383 				err = got_object_get_type(&matched_type, repo,
1384 				    &id);
1385 				if (err)
1386 					goto done;
1387 				if (matched_type != obj_type)
1388 					continue;
1389 			}
1390 			*unique_id = got_object_id_dup(&id);
1391 			if (*unique_id == NULL) {
1392 				err = got_error_from_errno("got_object_id_dup");
1393 				free(id_str);
1394 				goto done;
1395 			}
1396 		} else {
1397 			if (got_object_id_cmp(*unique_id, &id) == 0)
1398 				continue; /* both packed and loose */
1399 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1400 			free(id_str);
1401 			goto done;
1402 		}
1403 	}
1404 done:
1405 	if (dir && closedir(dir) != 0 && err == NULL)
1406 		err = got_error_from_errno("closedir");
1407 	if (err) {
1408 		free(*unique_id);
1409 		*unique_id = NULL;
1410 	}
1411 	free(path);
1412 	return err;
1413 }
1414 
1415 const struct got_error *
1416 got_repo_match_object_id_prefix(struct got_object_id **id,
1417     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1418 {
1419 	const struct got_error *err = NULL;
1420 	char *path_objects = got_repo_get_path_objects(repo);
1421 	char *object_dir = NULL;
1422 	size_t len;
1423 	int i;
1424 
1425 	*id = NULL;
1426 
1427 	for (i = 0; i < strlen(id_str_prefix); i++) {
1428 		if (isxdigit((unsigned char)id_str_prefix[i]))
1429 			continue;
1430 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1431 	}
1432 
1433 	len = strlen(id_str_prefix);
1434 	if (len >= 2) {
1435 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1436 		if (err)
1437 			goto done;
1438 		object_dir = strndup(id_str_prefix, 2);
1439 		if (object_dir == NULL) {
1440 			err = got_error_from_errno("strdup");
1441 			goto done;
1442 		}
1443 		err = match_loose_object(id, path_objects, object_dir,
1444 		    id_str_prefix, obj_type, repo);
1445 	} else if (len == 1) {
1446 		int i;
1447 		for (i = 0; i < 0xf; i++) {
1448 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1449 			    == -1) {
1450 				err = got_error_from_errno("asprintf");
1451 				goto done;
1452 			}
1453 			err = match_packed_object(id, repo, object_dir,
1454 			    obj_type);
1455 			if (err)
1456 				goto done;
1457 			err = match_loose_object(id, path_objects, object_dir,
1458 			    id_str_prefix, obj_type, repo);
1459 			if (err)
1460 				goto done;
1461 		}
1462 	} else {
1463 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1464 		goto done;
1465 	}
1466 done:
1467 	free(object_dir);
1468 	if (err) {
1469 		free(*id);
1470 		*id = NULL;
1471 	} else if (*id == NULL)
1472 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1473 
1474 	return err;
1475 }
1476 
1477 const struct got_error *
1478 got_repo_match_object_id(struct got_object_id **id, char **label,
1479     const char *id_str, int obj_type, struct got_reflist_head *refs,
1480     struct got_repository *repo)
1481 {
1482 	const struct got_error *err;
1483 	struct got_tag_object *tag;
1484 	struct got_reference *ref = NULL;
1485 
1486 	*id = NULL;
1487 	if (label)
1488 		*label = NULL;
1489 
1490 	if (refs) {
1491 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1492 		    refs, repo);
1493 		if (err == NULL) {
1494 			*id = got_object_id_dup(
1495 			    got_object_tag_get_object_id(tag));
1496 			if (*id == NULL)
1497 				err = got_error_from_errno("got_object_id_dup");
1498 			else if (label && asprintf(label, "refs/tags/%s",
1499 			    got_object_tag_get_name(tag)) == -1) {
1500 				err = got_error_from_errno("asprintf");
1501 				free(*id);
1502 				*id = NULL;
1503 			}
1504 			got_object_tag_close(tag);
1505 			return err;
1506 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1507 		    err->code != GOT_ERR_NO_OBJ)
1508 			return err;
1509 	}
1510 
1511 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1512 	if (err) {
1513 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1514 			return err;
1515 		err = got_ref_open(&ref, repo, id_str, 0);
1516 		if (err != NULL)
1517 			goto done;
1518 		if (label) {
1519 			*label = strdup(got_ref_get_name(ref));
1520 			if (*label == NULL) {
1521 				err = got_error_from_errno("strdup");
1522 				goto done;
1523 			}
1524 		}
1525 		err = got_ref_resolve(id, repo, ref);
1526 	} else if (label) {
1527 		err = got_object_id_str(label, *id);
1528 		if (*label == NULL) {
1529 			err = got_error_from_errno("strdup");
1530 			goto done;
1531 		}
1532 	}
1533 done:
1534 	if (ref)
1535 		got_ref_close(ref);
1536 	return err;
1537 }
1538 
1539 const struct got_error *
1540 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1541     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1542 {
1543 	const struct got_error *err = NULL;
1544 	struct got_reflist_entry *re;
1545 	struct got_object_id *tag_id;
1546 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1547 
1548 	*tag = NULL;
1549 
1550 	TAILQ_FOREACH(re, refs, entry) {
1551 		const char *refname;
1552 		refname = got_ref_get_name(re->ref);
1553 		if (got_ref_is_symbolic(re->ref))
1554 			continue;
1555 		if (strncmp(refname, "refs/tags/", 10) != 0)
1556 			continue;
1557 		if (!name_is_absolute)
1558 			refname += strlen("refs/tags/");
1559 		if (strcmp(refname, name) != 0)
1560 			continue;
1561 		err = got_ref_resolve(&tag_id, repo, re->ref);
1562 		if (err)
1563 			break;
1564 		err = got_object_open_as_tag(tag, repo, tag_id);
1565 		free(tag_id);
1566 		if (err)
1567 			break;
1568 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1569 		    got_object_tag_get_object_type(*tag) == obj_type)
1570 			break;
1571 		got_object_tag_close(*tag);
1572 		*tag = NULL;
1573 	}
1574 
1575 	if (err == NULL && *tag == NULL)
1576 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1577 	return err;
1578 }
1579 
1580 static const struct got_error *
1581 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1582     const char *name, mode_t mode, struct got_object_id *blob_id)
1583 {
1584 	const struct got_error *err = NULL;
1585 
1586 	 *new_te = NULL;
1587 
1588 	*new_te = calloc(1, sizeof(**new_te));
1589 	if (*new_te == NULL)
1590 		return got_error_from_errno("calloc");
1591 
1592 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1593 	    sizeof((*new_te)->name)) {
1594 		err = got_error(GOT_ERR_NO_SPACE);
1595 		goto done;
1596 	}
1597 
1598 	if (S_ISLNK(mode)) {
1599 		(*new_te)->mode = S_IFLNK;
1600 	} else {
1601 		(*new_te)->mode = S_IFREG;
1602 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1603 	}
1604 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1605 done:
1606 	if (err && *new_te) {
1607 		free(*new_te);
1608 		*new_te = NULL;
1609 	}
1610 	return err;
1611 }
1612 
1613 static const struct got_error *
1614 import_file(struct got_tree_entry **new_te, struct dirent *de,
1615     const char *path, struct got_repository *repo)
1616 {
1617 	const struct got_error *err;
1618 	struct got_object_id *blob_id = NULL;
1619 	char *filepath;
1620 	struct stat sb;
1621 
1622 	if (asprintf(&filepath, "%s%s%s", path,
1623 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1624 		return got_error_from_errno("asprintf");
1625 
1626 	if (lstat(filepath, &sb) != 0) {
1627 		err = got_error_from_errno2("lstat", path);
1628 		goto done;
1629 	}
1630 
1631 	err = got_object_blob_create(&blob_id, filepath, repo);
1632 	if (err)
1633 		goto done;
1634 
1635 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1636 	    blob_id);
1637 done:
1638 	free(filepath);
1639 	if (err)
1640 		free(blob_id);
1641 	return err;
1642 }
1643 
1644 static const struct got_error *
1645 insert_tree_entry(struct got_tree_entry *new_te,
1646     struct got_pathlist_head *paths)
1647 {
1648 	const struct got_error *err = NULL;
1649 	struct got_pathlist_entry *new_pe;
1650 
1651 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1652 	if (err)
1653 		return err;
1654 	if (new_pe == NULL)
1655 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1656 	return NULL;
1657 }
1658 
1659 static const struct got_error *write_tree(struct got_object_id **,
1660     const char *, struct got_pathlist_head *, struct got_repository *,
1661     got_repo_import_cb progress_cb, void *progress_arg);
1662 
1663 static const struct got_error *
1664 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1665     const char *path, struct got_pathlist_head *ignores,
1666     struct got_repository *repo,
1667     got_repo_import_cb progress_cb, void *progress_arg)
1668 {
1669 	const struct got_error *err;
1670 	struct got_object_id *id = NULL;
1671 	char *subdirpath;
1672 
1673 	if (asprintf(&subdirpath, "%s%s%s", path,
1674 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1675 		return got_error_from_errno("asprintf");
1676 
1677 	(*new_te) = calloc(1, sizeof(**new_te));
1678 	if (*new_te == NULL)
1679 		return got_error_from_errno("calloc");
1680 	(*new_te)->mode = S_IFDIR;
1681 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1682 	    sizeof((*new_te)->name)) {
1683 		err = got_error(GOT_ERR_NO_SPACE);
1684 		goto done;
1685 	}
1686 	err = write_tree(&id, subdirpath, ignores,  repo,
1687 	    progress_cb, progress_arg);
1688 	if (err)
1689 		goto done;
1690 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1691 	
1692 done:
1693 	free(id);
1694 	free(subdirpath);
1695 	if (err) {
1696 		free(*new_te);
1697 		*new_te = NULL;
1698 	}
1699 	return err;
1700 }
1701 
1702 static const struct got_error *
1703 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1704     struct got_pathlist_head *ignores, struct got_repository *repo,
1705     got_repo_import_cb progress_cb, void *progress_arg)
1706 {
1707 	const struct got_error *err = NULL;
1708 	DIR *dir;
1709 	struct dirent *de;
1710 	int nentries;
1711 	struct got_tree_entry *new_te = NULL;
1712 	struct got_pathlist_head paths;
1713 	struct got_pathlist_entry *pe;
1714 
1715 	*new_tree_id = NULL;
1716 
1717 	TAILQ_INIT(&paths);
1718 
1719 	dir = opendir(path_dir);
1720 	if (dir == NULL) {
1721 		err = got_error_from_errno2("opendir", path_dir);
1722 		goto done;
1723 	}
1724 
1725 	nentries = 0;
1726 	while ((de = readdir(dir)) != NULL) {
1727 		int ignore = 0;
1728 		int type;
1729 
1730 		if (strcmp(de->d_name, ".") == 0 ||
1731 		    strcmp(de->d_name, "..") == 0)
1732 			continue;
1733 
1734 		TAILQ_FOREACH(pe, ignores, entry) {
1735 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1736 				ignore = 1;
1737 				break;
1738 			}
1739 		}
1740 		if (ignore)
1741 			continue;
1742 
1743 		err = got_path_dirent_type(&type, path_dir, de);
1744 		if (err)
1745 			goto done;
1746 
1747 		if (type == DT_DIR) {
1748 			err = import_subdir(&new_te, de, path_dir,
1749 			    ignores, repo, progress_cb, progress_arg);
1750 			if (err) {
1751 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1752 					goto done;
1753 				err = NULL;
1754 				continue;
1755 			}
1756 		} else if (type == DT_REG || type == DT_LNK) {
1757 			err = import_file(&new_te, de, path_dir, repo);
1758 			if (err)
1759 				goto done;
1760 		} else
1761 			continue;
1762 
1763 		err = insert_tree_entry(new_te, &paths);
1764 		if (err)
1765 			goto done;
1766 		nentries++;
1767 	}
1768 
1769 	if (TAILQ_EMPTY(&paths)) {
1770 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1771 		    "cannot create tree without any entries");
1772 		goto done;
1773 	}
1774 
1775 	TAILQ_FOREACH(pe, &paths, entry) {
1776 		struct got_tree_entry *te = pe->data;
1777 		char *path;
1778 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1779 			continue;
1780 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1781 			err = got_error_from_errno("asprintf");
1782 			goto done;
1783 		}
1784 		err = (*progress_cb)(progress_arg, path);
1785 		free(path);
1786 		if (err)
1787 			goto done;
1788 	}
1789 
1790 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1791 done:
1792 	if (dir)
1793 		closedir(dir);
1794 	got_pathlist_free(&paths);
1795 	return err;
1796 }
1797 
1798 const struct got_error *
1799 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1800     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1801     struct got_repository *repo, got_repo_import_cb progress_cb,
1802     void *progress_arg)
1803 {
1804 	const struct got_error *err;
1805 	struct got_object_id *new_tree_id;
1806 
1807 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1808 	    progress_cb, progress_arg);
1809 	if (err)
1810 		return err;
1811 
1812 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1813 	    author, time(NULL), author, time(NULL), logmsg, repo);
1814 	free(new_tree_id);
1815 	return err;
1816 }
1817 
1818 const struct got_error *
1819 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
1820     struct got_repository *repo)
1821 {
1822 	const struct got_error *err = NULL;
1823 	char *path_objects = NULL, *path = NULL;
1824 	DIR *dir = NULL;
1825 	struct got_object_id id;
1826 	int i;
1827 
1828 	*nobjects = 0;
1829 	*ondisk_size = 0;
1830 
1831 	path_objects = got_repo_get_path_objects(repo);
1832 	if (path_objects == NULL)
1833 		return got_error_from_errno("got_repo_get_path_objects");
1834 
1835 	for (i = 0; i <= 0xff; i++) {
1836 		struct dirent *dent;
1837 
1838 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
1839 			err = got_error_from_errno("asprintf");
1840 			break;
1841 		}
1842 
1843 		dir = opendir(path);
1844 		if (dir == NULL) {
1845 			if (errno == ENOENT) {
1846 				err = NULL;
1847 				continue;
1848 			}
1849 			err = got_error_from_errno2("opendir", path);
1850 			break;
1851 		}
1852 
1853 		while ((dent = readdir(dir)) != NULL) {
1854 			char *id_str;
1855 			int fd;
1856 			struct stat sb;
1857 
1858 			if (strcmp(dent->d_name, ".") == 0 ||
1859 			    strcmp(dent->d_name, "..") == 0)
1860 				continue;
1861 
1862 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
1863 				err = got_error_from_errno("asprintf");
1864 				goto done;
1865 			}
1866 
1867 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
1868 				free(id_str);
1869 				continue;
1870 			}
1871 			free(id_str);
1872 
1873 			err = got_object_open_loose_fd(&fd, &id, repo);
1874 			if (err)
1875 				goto done;
1876 
1877 			if (fstat(fd, &sb) == -1) {
1878 				err = got_error_from_errno("fstat");
1879 				close(fd);
1880 				goto done;
1881 			}
1882 			(*nobjects)++;
1883 			(*ondisk_size) += sb.st_size;
1884 
1885 			if (close(fd) == -1) {
1886 				err = got_error_from_errno("close");
1887 				goto done;
1888 			}
1889 		}
1890 
1891 		if (closedir(dir) != 0) {
1892 			err = got_error_from_errno("closedir");
1893 			goto done;
1894 		}
1895 		dir = NULL;
1896 
1897 		free(path);
1898 		path = NULL;
1899 	}
1900 done:
1901 	if (dir && closedir(dir) != 0 && err == NULL)
1902 		err = got_error_from_errno("closedir");
1903 
1904 	if (err) {
1905 		*nobjects = 0;
1906 		*ondisk_size = 0;
1907 	}
1908 	free(path_objects);
1909 	free(path);
1910 	return err;
1911 }
1912 
1913 const struct got_error *
1914 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
1915     off_t *total_packsize, struct got_repository *repo)
1916 {
1917 	const struct got_error *err;
1918 	DIR *packdir = NULL;
1919 	struct dirent *dent;
1920 	struct got_packidx *packidx = NULL;
1921 	char *path_packidx;
1922 	char *path_packfile;
1923 	int packdir_fd;
1924 	struct stat sb;
1925 
1926 	*npackfiles = 0;
1927 	*nobjects = 0;
1928 	*total_packsize = 0;
1929 
1930 	packdir_fd = openat(got_repo_get_fd(repo),
1931 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1932 	if (packdir_fd == -1) {
1933 		return got_error_from_errno_fmt("openat: %s/%s",
1934 		    got_repo_get_path_git_dir(repo),
1935 		    GOT_OBJECTS_PACK_DIR);
1936 	}
1937 
1938 	packdir = fdopendir(packdir_fd);
1939 	if (packdir == NULL) {
1940 		err = got_error_from_errno("fdopendir");
1941 		goto done;
1942 	}
1943 
1944 	while ((dent = readdir(packdir)) != NULL) {
1945 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1946 			continue;
1947 
1948 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1949 		    dent->d_name) == -1) {
1950 			err = got_error_from_errno("asprintf");
1951 			goto done;
1952 		}
1953 
1954 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1955 		    path_packidx, 0);
1956 		free(path_packidx);
1957 		if (err)
1958 			goto done;
1959 
1960 		if (fstat(packidx->fd, &sb) == -1)
1961 			goto done;
1962 		*total_packsize += sb.st_size;
1963 
1964 		err = got_packidx_get_packfile_path(&path_packfile, packidx);
1965 		if (err)
1966 			goto done;
1967 
1968 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
1969 		    0) == -1) {
1970 			free(path_packfile);
1971 			goto done;
1972 		}
1973 		free(path_packfile);
1974 		*total_packsize += sb.st_size;
1975 
1976 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
1977 
1978 		(*npackfiles)++;
1979 
1980 		got_packidx_close(packidx);
1981 		packidx = NULL;
1982 	}
1983 done:
1984 	if (packidx)
1985 		got_packidx_close(packidx);
1986 	if (packdir && closedir(packdir) != 0 && err == NULL)
1987 		err = got_error_from_errno("closedir");
1988 	if (err) {
1989 		*npackfiles = 0;
1990 		*nobjects = 0;
1991 		*total_packsize = 0;
1992 	}
1993 	return err;
1994 }