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_object.h"
50 
51 #include "got_lib_delta.h"
52 #include "got_lib_inflate.h"
53 #include "got_lib_object.h"
54 #include "got_lib_object_parse.h"
55 #include "got_lib_object_create.h"
56 #include "got_lib_pack.h"
57 #include "got_lib_privsep.h"
58 #include "got_lib_sha1.h"
59 #include "got_lib_object_cache.h"
60 #include "got_lib_repository.h"
61 #include "got_lib_gotconfig.h"
62 
63 #ifndef nitems
64 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
65 #endif
66 
67 const char *
68 got_repo_get_path(struct got_repository *repo)
69 {
70 	return repo->path;
71 }
72 
73 const char *
74 got_repo_get_path_git_dir(struct got_repository *repo)
75 {
76 	return repo->path_git_dir;
77 }
78 
79 int
80 got_repo_get_fd(struct got_repository *repo)
81 {
82 	return repo->gitdir_fd;
83 }
84 
85 const char *
86 got_repo_get_gitconfig_author_name(struct got_repository *repo)
87 {
88 	return repo->gitconfig_author_name;
89 }
90 
91 const char *
92 got_repo_get_gitconfig_author_email(struct got_repository *repo)
93 {
94 	return repo->gitconfig_author_email;
95 }
96 
97 const char *
98 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
99 {
100 	return repo->global_gitconfig_author_name;
101 }
102 
103 const char *
104 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
105 {
106 	return repo->global_gitconfig_author_email;
107 }
108 
109 const char *
110 got_repo_get_gitconfig_owner(struct got_repository *repo)
111 {
112 	return repo->gitconfig_owner;
113 }
114 
115 int
116 got_repo_is_bare(struct got_repository *repo)
117 {
118 	return (strcmp(repo->path, repo->path_git_dir) == 0);
119 }
120 
121 static char *
122 get_path_git_child(struct got_repository *repo, const char *basename)
123 {
124 	char *path_child;
125 
126 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
127 	    basename) == -1)
128 		return NULL;
129 
130 	return path_child;
131 }
132 
133 char *
134 got_repo_get_path_objects(struct got_repository *repo)
135 {
136 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
137 }
138 
139 char *
140 got_repo_get_path_objects_pack(struct got_repository *repo)
141 {
142 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
143 }
144 
145 char *
146 got_repo_get_path_refs(struct got_repository *repo)
147 {
148 	return get_path_git_child(repo, GOT_REFS_DIR);
149 }
150 
151 char *
152 got_repo_get_path_packed_refs(struct got_repository *repo)
153 {
154 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
155 }
156 
157 static char *
158 get_path_head(struct got_repository *repo)
159 {
160 	return get_path_git_child(repo, GOT_HEAD_FILE);
161 }
162 
163 char *
164 got_repo_get_path_gitconfig(struct got_repository *repo)
165 {
166 	return get_path_git_child(repo, GOT_GITCONFIG);
167 }
168 
169 char *
170 got_repo_get_path_gotconfig(struct got_repository *repo)
171 {
172 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
173 }
174 
175 const struct got_gotconfig *
176 got_repo_get_gotconfig(struct got_repository *repo)
177 {
178 	return repo->gotconfig;
179 }
180 
181 void
182 got_repo_get_gitconfig_remotes(int *nremotes,
183     const struct got_remote_repo **remotes, struct got_repository *repo)
184 {
185 	*nremotes = repo->ngitconfig_remotes;
186 	*remotes = repo->gitconfig_remotes;
187 }
188 
189 static int
190 is_git_repo(struct got_repository *repo)
191 {
192 	const char *path_git = got_repo_get_path_git_dir(repo);
193 	char *path_objects = got_repo_get_path_objects(repo);
194 	char *path_refs = got_repo_get_path_refs(repo);
195 	char *path_head = get_path_head(repo);
196 	int ret = 0;
197 	struct stat sb;
198 	struct got_reference *head_ref;
199 
200 	if (lstat(path_git, &sb) == -1)
201 		goto done;
202 	if (!S_ISDIR(sb.st_mode))
203 		goto done;
204 
205 	if (lstat(path_objects, &sb) == -1)
206 		goto done;
207 	if (!S_ISDIR(sb.st_mode))
208 		goto done;
209 
210 	if (lstat(path_refs, &sb) == -1)
211 		goto done;
212 	if (!S_ISDIR(sb.st_mode))
213 		goto done;
214 
215 	if (lstat(path_head, &sb) == -1)
216 		goto done;
217 	if (!S_ISREG(sb.st_mode))
218 		goto done;
219 
220 	/* Check if the HEAD reference can be opened. */
221 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
222 		goto done;
223 	got_ref_close(head_ref);
224 
225 	ret = 1;
226 done:
227 	free(path_objects);
228 	free(path_refs);
229 	free(path_head);
230 	return ret;
231 
232 }
233 
234 const struct got_error *
235 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
236     struct got_object *obj)
237 {
238 #ifndef GOT_NO_OBJ_CACHE
239 	const struct got_error *err = NULL;
240 	err = got_object_cache_add(&repo->objcache, id, obj);
241 	if (err) {
242 		if (err->code == GOT_ERR_OBJ_EXISTS ||
243 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
244 			err = NULL;
245 		return err;
246 	}
247 	obj->refcnt++;
248 #endif
249 	return NULL;
250 }
251 
252 struct got_object *
253 got_repo_get_cached_object(struct got_repository *repo,
254     struct got_object_id *id)
255 {
256 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
257 }
258 
259 const struct got_error *
260 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
261     struct got_tree_object *tree)
262 {
263 #ifndef GOT_NO_OBJ_CACHE
264 	const struct got_error *err = NULL;
265 	err = got_object_cache_add(&repo->treecache, id, tree);
266 	if (err) {
267 		if (err->code == GOT_ERR_OBJ_EXISTS ||
268 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
269 			err = NULL;
270 		return err;
271 	}
272 	tree->refcnt++;
273 #endif
274 	return NULL;
275 }
276 
277 struct got_tree_object *
278 got_repo_get_cached_tree(struct got_repository *repo,
279     struct got_object_id *id)
280 {
281 	return (struct got_tree_object *)got_object_cache_get(
282 	    &repo->treecache, id);
283 }
284 
285 const struct got_error *
286 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
287     struct got_commit_object *commit)
288 {
289 #ifndef GOT_NO_OBJ_CACHE
290 	const struct got_error *err = NULL;
291 	err = got_object_cache_add(&repo->commitcache, id, commit);
292 	if (err) {
293 		if (err->code == GOT_ERR_OBJ_EXISTS ||
294 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
295 			err = NULL;
296 		return err;
297 	}
298 	commit->refcnt++;
299 #endif
300 	return NULL;
301 }
302 
303 struct got_commit_object *
304 got_repo_get_cached_commit(struct got_repository *repo,
305     struct got_object_id *id)
306 {
307 	return (struct got_commit_object *)got_object_cache_get(
308 	    &repo->commitcache, id);
309 }
310 
311 const struct got_error *
312 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
313     struct got_tag_object *tag)
314 {
315 #ifndef GOT_NO_OBJ_CACHE
316 	const struct got_error *err = NULL;
317 	err = got_object_cache_add(&repo->tagcache, id, tag);
318 	if (err) {
319 		if (err->code == GOT_ERR_OBJ_EXISTS ||
320 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
321 			err = NULL;
322 		return err;
323 	}
324 	tag->refcnt++;
325 #endif
326 	return NULL;
327 }
328 
329 struct got_tag_object *
330 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
331 {
332 	return (struct got_tag_object *)got_object_cache_get(
333 	    &repo->tagcache, id);
334 }
335 
336 static const struct got_error *
337 open_repo(struct got_repository *repo, const char *path)
338 {
339 	const struct got_error *err = NULL;
340 
341 	repo->gitdir_fd = -1;
342 
343 	/* bare git repository? */
344 	repo->path_git_dir = strdup(path);
345 	if (repo->path_git_dir == NULL)
346 		return got_error_from_errno("strdup");
347 	if (is_git_repo(repo)) {
348 		repo->path = strdup(repo->path_git_dir);
349 		if (repo->path == NULL) {
350 			err = got_error_from_errno("strdup");
351 			goto done;
352 		}
353 		repo->gitdir_fd = open(repo->path_git_dir, O_DIRECTORY);
354 		if (repo->gitdir_fd == -1) {
355 			err = got_error_from_errno2("open",
356 			    repo->path_git_dir);
357 			goto done;
358 		}
359 		return NULL;
360 	}
361 
362 	/* git repository with working tree? */
363 	free(repo->path_git_dir);
364 	repo->path_git_dir = NULL;
365 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
366 		err = got_error_from_errno("asprintf");
367 		goto done;
368 	}
369 	if (is_git_repo(repo)) {
370 		repo->path = strdup(path);
371 		if (repo->path == NULL) {
372 			err = got_error_from_errno("strdup");
373 			goto done;
374 		}
375 		repo->gitdir_fd = open(repo->path_git_dir, O_DIRECTORY);
376 		if (repo->gitdir_fd == -1) {
377 			err = got_error_from_errno2("open",
378 			    repo->path_git_dir);
379 			goto done;
380 		}
381 		return NULL;
382 	}
383 
384 	err = got_error(GOT_ERR_NOT_GIT_REPO);
385 done:
386 	if (err) {
387 		free(repo->path);
388 		repo->path = NULL;
389 		free(repo->path_git_dir);
390 		repo->path_git_dir = NULL;
391 		if (repo->gitdir_fd != -1)
392 			close(repo->gitdir_fd);
393 		repo->gitdir_fd = -1;
394 
395 	}
396 	return err;
397 }
398 
399 static const struct got_error *
400 parse_gitconfig_file(int *gitconfig_repository_format_version,
401     char **gitconfig_author_name, char **gitconfig_author_email,
402     struct got_remote_repo **remotes, int *nremotes,
403     char **gitconfig_owner, char ***extensions, int *nextensions,
404     const char *gitconfig_path)
405 {
406 	const struct got_error *err = NULL, *child_err = NULL;
407 	int fd = -1;
408 	int imsg_fds[2] = { -1, -1 };
409 	pid_t pid;
410 	struct imsgbuf *ibuf;
411 
412 	*gitconfig_repository_format_version = 0;
413 	if (extensions)
414 		*extensions = NULL;
415 	if (nextensions)
416 		*nextensions = 0;
417 	*gitconfig_author_name = NULL;
418 	*gitconfig_author_email = NULL;
419 	if (remotes)
420 		*remotes = NULL;
421 	if (nremotes)
422 		*nremotes = 0;
423 	if (gitconfig_owner)
424 		*gitconfig_owner = NULL;
425 
426 	fd = open(gitconfig_path, O_RDONLY);
427 	if (fd == -1) {
428 		if (errno == ENOENT)
429 			return NULL;
430 		return got_error_from_errno2("open", gitconfig_path);
431 	}
432 
433 	ibuf = calloc(1, sizeof(*ibuf));
434 	if (ibuf == NULL) {
435 		err = got_error_from_errno("calloc");
436 		goto done;
437 	}
438 
439 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
440 		err = got_error_from_errno("socketpair");
441 		goto done;
442 	}
443 
444 	pid = fork();
445 	if (pid == -1) {
446 		err = got_error_from_errno("fork");
447 		goto done;
448 	} else if (pid == 0) {
449 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
450 		    gitconfig_path);
451 		/* not reached */
452 	}
453 
454 	if (close(imsg_fds[1]) == -1) {
455 		err = got_error_from_errno("close");
456 		goto done;
457 	}
458 	imsg_fds[1] = -1;
459 	imsg_init(ibuf, imsg_fds[0]);
460 
461 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
462 	if (err)
463 		goto done;
464 	fd = -1;
465 
466 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
467 	if (err)
468 		goto done;
469 
470 	err = got_privsep_recv_gitconfig_int(
471 	    gitconfig_repository_format_version, ibuf);
472 	if (err)
473 		goto done;
474 
475 	if (extensions && nextensions) {
476 		err = got_privsep_send_gitconfig_repository_extensions_req(
477 		    ibuf);
478 		if (err)
479 			goto done;
480 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
481 		if (err)
482 			goto done;
483 		if (*nextensions > 0) {
484 			int i;
485 			*extensions = calloc(*nextensions, sizeof(char *));
486 			if (*extensions == NULL) {
487 				err = got_error_from_errno("calloc");
488 				goto done;
489 			}
490 			for (i = 0; i < *nextensions; i++) {
491 				char *ext;
492 				err = got_privsep_recv_gitconfig_str(&ext,
493 				    ibuf);
494 				if (err)
495 					goto done;
496 				(*extensions)[i] = ext;
497 			}
498 		}
499 	}
500 
501 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
502 	if (err)
503 		goto done;
504 
505 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
506 	if (err)
507 		goto done;
508 
509 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
510 	if (err)
511 		goto done;
512 
513 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
514 	if (err)
515 		goto done;
516 
517 	if (remotes && nremotes) {
518 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
519 		if (err)
520 			goto done;
521 
522 		err = got_privsep_recv_gitconfig_remotes(remotes,
523 		    nremotes, ibuf);
524 		if (err)
525 			goto done;
526 	}
527 
528 	if (gitconfig_owner) {
529 		err = got_privsep_send_gitconfig_owner_req(ibuf);
530 		if (err)
531 			goto done;
532 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
533 		if (err)
534 			goto done;
535 	}
536 
537 	imsg_clear(ibuf);
538 	err = got_privsep_send_stop(imsg_fds[0]);
539 	child_err = got_privsep_wait_for_child(pid);
540 	if (child_err && err == NULL)
541 		err = child_err;
542 done:
543 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
544 		err = got_error_from_errno("close");
545 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
546 		err = got_error_from_errno("close");
547 	if (fd != -1 && close(fd) == -1 && err == NULL)
548 		err = got_error_from_errno2("close", gitconfig_path);
549 	free(ibuf);
550 	return err;
551 }
552 
553 static const struct got_error *
554 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
555 {
556 	const struct got_error *err = NULL;
557 	char *repo_gitconfig_path = NULL;
558 
559 	if (global_gitconfig_path) {
560 		/* Read settings from ~/.gitconfig. */
561 		int dummy_repo_version;
562 		err = parse_gitconfig_file(&dummy_repo_version,
563 		    &repo->global_gitconfig_author_name,
564 		    &repo->global_gitconfig_author_email,
565 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
566 		if (err)
567 			return err;
568 	}
569 
570 	/* Read repository's .git/config file. */
571 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
572 	if (repo_gitconfig_path == NULL)
573 		return got_error_from_errno("got_repo_get_path_gitconfig");
574 
575 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
576 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
577 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
578 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
579 	    repo_gitconfig_path);
580 	if (err)
581 		goto done;
582 done:
583 	free(repo_gitconfig_path);
584 	return err;
585 }
586 
587 static const struct got_error *
588 read_gotconfig(struct got_repository *repo)
589 {
590 	const struct got_error *err = NULL;
591 	char *gotconfig_path;
592 
593 	gotconfig_path = got_repo_get_path_gotconfig(repo);
594 	if (gotconfig_path == NULL)
595 		return got_error_from_errno("got_repo_get_path_gotconfig");
596 
597 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
598 	free(gotconfig_path);
599 	return err;
600 }
601 
602 /* Supported repository format extensions. */
603 static const char *repo_extensions[] = {
604 	"noop",			/* Got supports repository format version 1. */
605 	"preciousObjects",	/* Got has no garbage collection yet. */
606 	"worktreeConfig",	/* Got does not care about Git work trees. */
607 };
608 
609 const struct got_error *
610 got_repo_open(struct got_repository **repop, const char *path,
611     const char *global_gitconfig_path)
612 {
613 	struct got_repository *repo = NULL;
614 	const struct got_error *err = NULL;
615 	char *repo_path = NULL;
616 	size_t i;
617 	struct rlimit rl;
618 
619 	*repop = NULL;
620 
621 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
622 		return got_error_from_errno("getrlimit");
623 
624 	repo = calloc(1, sizeof(*repo));
625 	if (repo == NULL) {
626 		err = got_error_from_errno("calloc");
627 		goto done;
628 	}
629 
630 	for (i = 0; i < nitems(repo->privsep_children); i++) {
631 		memset(&repo->privsep_children[i], 0,
632 		    sizeof(repo->privsep_children[0]));
633 		repo->privsep_children[i].imsg_fd = -1;
634 	}
635 
636 	err = got_object_cache_init(&repo->objcache,
637 	    GOT_OBJECT_CACHE_TYPE_OBJ);
638 	if (err)
639 		goto done;
640 	err = got_object_cache_init(&repo->treecache,
641 	    GOT_OBJECT_CACHE_TYPE_TREE);
642 	if (err)
643 		goto done;
644 	err = got_object_cache_init(&repo->commitcache,
645 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
646 	if (err)
647 		goto done;
648 	err = got_object_cache_init(&repo->tagcache,
649 	    GOT_OBJECT_CACHE_TYPE_TAG);
650 	if (err)
651 		goto done;
652 
653 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
654 	if (repo->pack_cache_size > rl.rlim_cur / 8)
655 		repo->pack_cache_size = rl.rlim_cur / 8;
656 
657 	repo_path = realpath(path, NULL);
658 	if (repo_path == NULL) {
659 		err = got_error_from_errno2("realpath", path);
660 		goto done;
661 	}
662 
663 	for (;;) {
664 		char *parent_path;
665 
666 		err = open_repo(repo, repo_path);
667 		if (err == NULL)
668 			break;
669 		if (err->code != GOT_ERR_NOT_GIT_REPO)
670 			goto done;
671 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
672 			err = got_error(GOT_ERR_NOT_GIT_REPO);
673 			goto done;
674 		}
675 		err = got_path_dirname(&parent_path, repo_path);
676 		if (err)
677 			goto done;
678 		free(repo_path);
679 		repo_path = parent_path;
680 	}
681 
682 	err = read_gotconfig(repo);
683 	if (err)
684 		goto done;
685 
686 	err = read_gitconfig(repo, global_gitconfig_path);
687 	if (err)
688 		goto done;
689 	if (repo->gitconfig_repository_format_version != 0)
690 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
691 	for (i = 0; i < repo->nextensions; i++) {
692 		char *ext = repo->extensions[i];
693 		int j, supported = 0;
694 		for (j = 0; j < nitems(repo_extensions); j++) {
695 			if (strcmp(ext, repo_extensions[j]) == 0) {
696 				supported = 1;
697 				break;
698 			}
699 		}
700 		if (!supported) {
701 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
702 			goto done;
703 		}
704 	}
705 done:
706 	if (err)
707 		got_repo_close(repo);
708 	else
709 		*repop = repo;
710 	free(repo_path);
711 	return err;
712 }
713 
714 const struct got_error *
715 got_repo_close(struct got_repository *repo)
716 {
717 	const struct got_error *err = NULL, *child_err;
718 	size_t i;
719 
720 	for (i = 0; i < repo->pack_cache_size; i++) {
721 		if (repo->packidx_cache[i] == NULL)
722 			break;
723 		got_packidx_close(repo->packidx_cache[i]);
724 	}
725 
726 	for (i = 0; i < repo->pack_cache_size; i++) {
727 		if (repo->packs[i].path_packfile == NULL)
728 			break;
729 		got_pack_close(&repo->packs[i]);
730 	}
731 
732 	free(repo->path);
733 	free(repo->path_git_dir);
734 
735 	got_object_cache_close(&repo->objcache);
736 	got_object_cache_close(&repo->treecache);
737 	got_object_cache_close(&repo->commitcache);
738 	got_object_cache_close(&repo->tagcache);
739 
740 	for (i = 0; i < nitems(repo->privsep_children); i++) {
741 		if (repo->privsep_children[i].imsg_fd == -1)
742 			continue;
743 		imsg_clear(repo->privsep_children[i].ibuf);
744 		free(repo->privsep_children[i].ibuf);
745 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
746 		child_err = got_privsep_wait_for_child(
747 		    repo->privsep_children[i].pid);
748 		if (child_err && err == NULL)
749 			err = child_err;
750 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
751 		    err == NULL)
752 			err = got_error_from_errno("close");
753 	}
754 
755 	if (repo->gitdir_fd != -1)
756 		close(repo->gitdir_fd);
757 
758 	if (repo->gotconfig)
759 		got_gotconfig_free(repo->gotconfig);
760 	free(repo->gitconfig_author_name);
761 	free(repo->gitconfig_author_email);
762 	for (i = 0; i < repo->ngitconfig_remotes; i++)
763 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
764 	free(repo->gitconfig_remotes);
765 	for (i = 0; i < repo->nextensions; i++)
766 		free(repo->extensions[i]);
767 	free(repo->extensions);
768 	free(repo);
769 
770 	return err;
771 }
772 
773 void
774 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
775 {
776 	int i;
777 
778 	free(repo->name);
779 	repo->name = NULL;
780 	free(repo->url);
781 	repo->url = NULL;
782 	for (i = 0; i < repo->nbranches; i++)
783 		free(repo->branches[i]);
784 	free(repo->branches);
785 	repo->branches = NULL;
786 	repo->nbranches = 0;
787 }
788 
789 const struct got_error *
790 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
791     const char *input_path)
792 {
793 	const struct got_error *err = NULL;
794 	const char *repo_abspath = NULL;
795 	size_t repolen, len;
796 	char *canonpath, *path = NULL;
797 
798 	*in_repo_path = NULL;
799 
800 	canonpath = strdup(input_path);
801 	if (canonpath == NULL) {
802 		err = got_error_from_errno("strdup");
803 		goto done;
804 	}
805 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
806 	if (err)
807 		goto done;
808 
809 	repo_abspath = got_repo_get_path(repo);
810 
811 	if (canonpath[0] == '\0') {
812 		path = strdup(canonpath);
813 		if (path == NULL) {
814 			err = got_error_from_errno("strdup");
815 			goto done;
816 		}
817 	} else {
818 		path = realpath(canonpath, NULL);
819 		if (path == NULL) {
820 			if (errno != ENOENT) {
821 				err = got_error_from_errno2("realpath",
822 				    canonpath);
823 				goto done;
824 			}
825 			/*
826 			 * Path is not on disk.
827 			 * Assume it is already relative to repository root.
828 			 */
829 			path = strdup(canonpath);
830 			if (path == NULL) {
831 				err = got_error_from_errno("strdup");
832 				goto done;
833 			}
834 		}
835 
836 		repolen = strlen(repo_abspath);
837 		len = strlen(path);
838 
839 
840 		if (strcmp(path, repo_abspath) == 0) {
841 			free(path);
842 			path = strdup("");
843 			if (path == NULL) {
844 				err = got_error_from_errno("strdup");
845 				goto done;
846 			}
847 		} else if (len > repolen &&
848 		    got_path_is_child(path, repo_abspath, repolen)) {
849 			/* Matched an on-disk path inside repository. */
850 			if (got_repo_is_bare(repo)) {
851 				/*
852 				 * Matched an on-disk path inside repository
853 				 * database. Treat input as repository-relative.
854 				 */
855 				 free(path);
856 				 path = canonpath;
857 				 canonpath = NULL;
858 			} else {
859 				char *child;
860 				/* Strip common prefix with repository path. */
861 				err = got_path_skip_common_ancestor(&child,
862 				    repo_abspath, path);
863 				if (err)
864 					goto done;
865 				free(path);
866 				path = child;
867 			}
868 		} else {
869 			/*
870 			 * Matched unrelated on-disk path.
871 			 * Treat input as repository-relative.
872 			 */
873 			 free(path);
874 			 path = canonpath;
875 			 canonpath = NULL;
876 		}
877 	}
878 
879 	/* Make in-repository path absolute */
880 	if (path[0] != '/') {
881 		char *abspath;
882 		if (asprintf(&abspath, "/%s", path) == -1) {
883 			err = got_error_from_errno("asprintf");
884 			goto done;
885 		}
886 		free(path);
887 		path = abspath;
888 	}
889 
890 done:
891 	free(canonpath);
892 	if (err)
893 		free(path);
894 	else
895 		*in_repo_path = path;
896 	return err;
897 }
898 
899 static const struct got_error *
900 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
901     const char *path_packidx)
902 {
903 	const struct got_error *err = NULL;
904 	size_t i;
905 
906 	for (i = 0; i < repo->pack_cache_size; i++) {
907 		if (repo->packidx_cache[i] == NULL)
908 			break;
909 		if (strcmp(repo->packidx_cache[i]->path_packidx,
910 		    path_packidx) == 0) {
911 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
912 		}
913 	}
914 	if (i == repo->pack_cache_size) {
915 		err = got_packidx_close(repo->packidx_cache[i - 1]);
916 		if (err)
917 			return err;
918 	}
919 
920 	/*
921 	 * Insert the new pack index at the front so it will
922 	 * be searched first in the future.
923 	 */
924 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
925 	    sizeof(repo->packidx_cache) -
926 	    sizeof(repo->packidx_cache[0]));
927 	repo->packidx_cache[0] = packidx;
928 
929 	return NULL;
930 }
931 
932 static int
933 is_packidx_filename(const char *name, size_t len)
934 {
935 	if (len != GOT_PACKIDX_NAMELEN)
936 		return 0;
937 
938 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
939 		return 0;
940 
941 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
942 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
943 		return 0;
944 
945 	return 1;
946 }
947 
948 const struct got_error *
949 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
950     struct got_repository *repo, struct got_object_id *id)
951 {
952 	const struct got_error *err;
953 	DIR *packdir = NULL;
954 	struct dirent *dent;
955 	char *path_packidx;
956 	size_t i;
957 	int packdir_fd;
958 
959 	/* Search pack index cache. */
960 	for (i = 0; i < repo->pack_cache_size; i++) {
961 		if (repo->packidx_cache[i] == NULL)
962 			break;
963 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
964 		if (*idx != -1) {
965 			*packidx = repo->packidx_cache[i];
966 			/*
967 			 * Move this cache entry to the front. Repeatedly
968 			 * searching a wrong pack index can be expensive.
969 			 */
970 			if (i > 0) {
971 				struct got_packidx *p;
972 				p = repo->packidx_cache[0];
973 				repo->packidx_cache[0] = *packidx;
974 				repo->packidx_cache[i] = p;
975 			}
976 			return NULL;
977 		}
978 	}
979 	/* No luck. Search the filesystem. */
980 
981 	packdir_fd = openat(got_repo_get_fd(repo),
982 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
983 	if (packdir_fd == -1) {
984 		if (errno == ENOENT)
985 			err = got_error_no_obj(id);
986 		else
987 			err = got_error_from_errno_fmt("openat: %s/%s",
988 			    got_repo_get_path_git_dir(repo),
989 			    GOT_OBJECTS_PACK_DIR);
990 		goto done;
991 	}
992 
993 	packdir = fdopendir(packdir_fd);
994 	if (packdir == NULL) {
995 		err = got_error_from_errno("fdopendir");
996 		goto done;
997 	}
998 
999 	while ((dent = readdir(packdir)) != NULL) {
1000 		int is_cached = 0;
1001 
1002 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1003 			continue;
1004 
1005 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1006 		    dent->d_name) == -1) {
1007 			err = got_error_from_errno("asprintf");
1008 			goto done;
1009 		}
1010 
1011 		for (i = 0; i < repo->pack_cache_size; i++) {
1012 			if (repo->packidx_cache[i] == NULL)
1013 				break;
1014 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1015 			    path_packidx) == 0) {
1016 				is_cached = 1;
1017 				break;
1018 			}
1019 		}
1020 		if (is_cached) {
1021 			free(path_packidx);
1022 			continue; /* already searched */
1023 		}
1024 
1025 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1026 		    path_packidx, 0);
1027 		if (err) {
1028 			free(path_packidx);
1029 			goto done;
1030 		}
1031 
1032 		err = cache_packidx(repo, *packidx, path_packidx);
1033 		free(path_packidx);
1034 		if (err)
1035 			goto done;
1036 
1037 		*idx = got_packidx_get_object_idx(*packidx, id);
1038 		if (*idx != -1) {
1039 			err = NULL; /* found the object */
1040 			goto done;
1041 		}
1042 	}
1043 
1044 	err = got_error_no_obj(id);
1045 done:
1046 	if (packdir && closedir(packdir) != 0 && err == NULL)
1047 		err = got_error_from_errno("closedir");
1048 	return err;
1049 }
1050 
1051 static const struct got_error *
1052 read_packfile_hdr(int fd, struct got_packidx *packidx)
1053 {
1054 	const struct got_error *err = NULL;
1055 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1056 	struct got_packfile_hdr hdr;
1057 	ssize_t n;
1058 
1059 	n = read(fd, &hdr, sizeof(hdr));
1060 	if (n < 0)
1061 		return got_error_from_errno("read");
1062 	if (n != sizeof(hdr))
1063 		return got_error(GOT_ERR_BAD_PACKFILE);
1064 
1065 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1066 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1067 	    be32toh(hdr.nobjects) != totobj)
1068 		err = got_error(GOT_ERR_BAD_PACKFILE);
1069 
1070 	return err;
1071 }
1072 
1073 static const struct got_error *
1074 open_packfile(int *fd, struct got_repository *repo,
1075     const char *relpath, struct got_packidx *packidx)
1076 {
1077 	const struct got_error *err = NULL;
1078 
1079 	*fd = openat(got_repo_get_fd(repo), relpath, O_RDONLY | O_NOFOLLOW);
1080 	if (*fd == -1)
1081 		return got_error_from_errno_fmt("openat: %s/%s",
1082 		    got_repo_get_path_git_dir(repo), relpath);
1083 
1084 	if (packidx) {
1085 		err = read_packfile_hdr(*fd, packidx);
1086 		if (err) {
1087 			close(*fd);
1088 			*fd = -1;
1089 		}
1090 	}
1091 
1092 	return err;
1093 }
1094 
1095 const struct got_error *
1096 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1097     const char *path_packfile, struct got_packidx *packidx)
1098 {
1099 	const struct got_error *err = NULL;
1100 	struct got_pack *pack = NULL;
1101 	struct stat sb;
1102 	size_t i;
1103 
1104 	if (packp)
1105 		*packp = NULL;
1106 
1107 	for (i = 0; i < repo->pack_cache_size; i++) {
1108 		pack = &repo->packs[i];
1109 		if (pack->path_packfile == NULL)
1110 			break;
1111 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1112 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1113 	}
1114 
1115 	if (i == repo->pack_cache_size) {
1116 		err = got_pack_close(&repo->packs[i - 1]);
1117 		if (err)
1118 			return err;
1119 		memmove(&repo->packs[1], &repo->packs[0],
1120 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1121 		i = 0;
1122 	}
1123 
1124 	pack = &repo->packs[i];
1125 
1126 	pack->path_packfile = strdup(path_packfile);
1127 	if (pack->path_packfile == NULL) {
1128 		err = got_error_from_errno("strdup");
1129 		goto done;
1130 	}
1131 
1132 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1133 	if (err)
1134 		goto done;
1135 
1136 	if (fstat(pack->fd, &sb) != 0) {
1137 		err = got_error_from_errno("fstat");
1138 		goto done;
1139 	}
1140 	pack->filesize = sb.st_size;
1141 
1142 	pack->privsep_child = NULL;
1143 
1144 #ifndef GOT_PACK_NO_MMAP
1145 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1146 	    pack->fd, 0);
1147 	if (pack->map == MAP_FAILED) {
1148 		if (errno != ENOMEM) {
1149 			err = got_error_from_errno("mmap");
1150 			goto done;
1151 		}
1152 		pack->map = NULL; /* fall back to read(2) */
1153 	}
1154 #endif
1155 done:
1156 	if (err) {
1157 		if (pack) {
1158 			free(pack->path_packfile);
1159 			memset(pack, 0, sizeof(*pack));
1160 		}
1161 	} else if (packp)
1162 		*packp = pack;
1163 	return err;
1164 }
1165 
1166 struct got_pack *
1167 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1168 {
1169 	struct got_pack *pack = NULL;
1170 	size_t i;
1171 
1172 	for (i = 0; i < repo->pack_cache_size; i++) {
1173 		pack = &repo->packs[i];
1174 		if (pack->path_packfile == NULL)
1175 			break;
1176 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1177 			return pack;
1178 	}
1179 
1180 	return NULL;
1181 }
1182 
1183 const struct got_error *
1184 got_repo_init(const char *repo_path)
1185 {
1186 	const struct got_error *err = NULL;
1187 	const char *dirnames[] = {
1188 		GOT_OBJECTS_DIR,
1189 		GOT_OBJECTS_PACK_DIR,
1190 		GOT_REFS_DIR,
1191 	};
1192 	const char *description_str = "Unnamed repository; "
1193 	    "edit this file 'description' to name the repository.";
1194 	const char *headref_str = "ref: refs/heads/main";
1195 	const char *gitconfig_str = "[core]\n"
1196 	    "\trepositoryformatversion = 0\n"
1197 	    "\tfilemode = true\n"
1198 	    "\tbare = true\n";
1199 	char *path;
1200 	size_t i;
1201 
1202 	if (!got_path_dir_is_empty(repo_path))
1203 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1204 
1205 	for (i = 0; i < nitems(dirnames); i++) {
1206 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1207 			return got_error_from_errno("asprintf");
1208 		}
1209 		err = got_path_mkdir(path);
1210 		free(path);
1211 		if (err)
1212 			return err;
1213 	}
1214 
1215 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1216 		return got_error_from_errno("asprintf");
1217 	err = got_path_create_file(path, description_str);
1218 	free(path);
1219 	if (err)
1220 		return err;
1221 
1222 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1223 		return got_error_from_errno("asprintf");
1224 	err = got_path_create_file(path, headref_str);
1225 	free(path);
1226 	if (err)
1227 		return err;
1228 
1229 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1230 		return got_error_from_errno("asprintf");
1231 	err = got_path_create_file(path, gitconfig_str);
1232 	free(path);
1233 	if (err)
1234 		return err;
1235 
1236 	return NULL;
1237 }
1238 
1239 static const struct got_error *
1240 match_packed_object(struct got_object_id **unique_id,
1241     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1242 {
1243 	const struct got_error *err = NULL;
1244 	DIR *packdir = NULL;
1245 	struct dirent *dent;
1246 	char *path_packidx;
1247 	struct got_object_id_queue matched_ids;
1248 	int packdir_fd;
1249 
1250 	SIMPLEQ_INIT(&matched_ids);
1251 
1252 	packdir_fd = openat(got_repo_get_fd(repo),
1253 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1254 	if (packdir_fd == -1) {
1255 		if (errno != ENOENT)
1256 			err = got_error_from_errno2("openat", GOT_OBJECTS_PACK_DIR);
1257 		goto done;
1258 	}
1259 
1260 	packdir = fdopendir(packdir_fd);
1261 	if (packdir == NULL) {
1262 		err = got_error_from_errno("fdopendir");
1263 		goto done;
1264 	}
1265 
1266 	while ((dent = readdir(packdir)) != NULL) {
1267 		struct got_packidx *packidx;
1268 		struct got_object_qid *qid;
1269 
1270 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1271 			continue;
1272 
1273 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1274 		    dent->d_name) == -1) {
1275 			err = got_error_from_errno("strdup");
1276 			break;
1277 		}
1278 
1279 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1280 		    path_packidx, 0);
1281 		free(path_packidx);
1282 		if (err)
1283 			break;
1284 
1285 		err = got_packidx_match_id_str_prefix(&matched_ids,
1286 		    packidx, id_str_prefix);
1287 		if (err) {
1288 			got_packidx_close(packidx);
1289 			break;
1290 		}
1291 		err = got_packidx_close(packidx);
1292 		if (err)
1293 			break;
1294 
1295 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1296 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1297 				int matched_type;
1298 				err = got_object_get_type(&matched_type, repo,
1299 				    qid->id);
1300 				if (err)
1301 					goto done;
1302 				if (matched_type != obj_type)
1303 					continue;
1304 			}
1305 			if (*unique_id == NULL) {
1306 				*unique_id = got_object_id_dup(qid->id);
1307 				if (*unique_id == NULL) {
1308 					err = got_error_from_errno("malloc");
1309 					goto done;
1310 				}
1311 			} else {
1312 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1313 					continue; /* packed multiple times */
1314 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1315 				goto done;
1316 			}
1317 		}
1318 	}
1319 done:
1320 	got_object_id_queue_free(&matched_ids);
1321 	if (packdir && closedir(packdir) != 0 && err == NULL)
1322 		err = got_error_from_errno("closedir");
1323 	if (err) {
1324 		free(*unique_id);
1325 		*unique_id = NULL;
1326 	}
1327 	return err;
1328 }
1329 
1330 static const struct got_error *
1331 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1332     const char *object_dir, const char *id_str_prefix, int obj_type,
1333     struct got_repository *repo)
1334 {
1335 	const struct got_error *err = NULL;
1336 	char *path;
1337 	DIR *dir = NULL;
1338 	struct dirent *dent;
1339 	struct got_object_id id;
1340 
1341 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1342 		err = got_error_from_errno("asprintf");
1343 		goto done;
1344 	}
1345 
1346 	dir = opendir(path);
1347 	if (dir == NULL) {
1348 		if (errno == ENOENT) {
1349 			err = NULL;
1350 			goto done;
1351 		}
1352 		err = got_error_from_errno2("opendir", path);
1353 		goto done;
1354 	}
1355 	while ((dent = readdir(dir)) != NULL) {
1356 		char *id_str;
1357 		int cmp;
1358 
1359 		if (strcmp(dent->d_name, ".") == 0 ||
1360 		    strcmp(dent->d_name, "..") == 0)
1361 			continue;
1362 
1363 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1364 			err = got_error_from_errno("asprintf");
1365 			goto done;
1366 		}
1367 
1368 		if (!got_parse_sha1_digest(id.sha1, id_str))
1369 			continue;
1370 
1371 		/*
1372 		 * Directory entries do not necessarily appear in
1373 		 * sorted order, so we must iterate over all of them.
1374 		 */
1375 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1376 		if (cmp != 0) {
1377 			free(id_str);
1378 			continue;
1379 		}
1380 
1381 		if (*unique_id == NULL) {
1382 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1383 				int matched_type;
1384 				err = got_object_get_type(&matched_type, repo,
1385 				    &id);
1386 				if (err)
1387 					goto done;
1388 				if (matched_type != obj_type)
1389 					continue;
1390 			}
1391 			*unique_id = got_object_id_dup(&id);
1392 			if (*unique_id == NULL) {
1393 				err = got_error_from_errno("got_object_id_dup");
1394 				free(id_str);
1395 				goto done;
1396 			}
1397 		} else {
1398 			if (got_object_id_cmp(*unique_id, &id) == 0)
1399 				continue; /* both packed and loose */
1400 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1401 			free(id_str);
1402 			goto done;
1403 		}
1404 	}
1405 done:
1406 	if (dir && closedir(dir) != 0 && err == NULL)
1407 		err = got_error_from_errno("closedir");
1408 	if (err) {
1409 		free(*unique_id);
1410 		*unique_id = NULL;
1411 	}
1412 	free(path);
1413 	return err;
1414 }
1415 
1416 const struct got_error *
1417 got_repo_match_object_id_prefix(struct got_object_id **id,
1418     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1419 {
1420 	const struct got_error *err = NULL;
1421 	char *path_objects = got_repo_get_path_objects(repo);
1422 	char *object_dir = NULL;
1423 	size_t len;
1424 	int i;
1425 
1426 	*id = NULL;
1427 
1428 	for (i = 0; i < strlen(id_str_prefix); i++) {
1429 		if (isxdigit((unsigned char)id_str_prefix[i]))
1430 			continue;
1431 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1432 	}
1433 
1434 	len = strlen(id_str_prefix);
1435 	if (len >= 2) {
1436 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1437 		if (err)
1438 			goto done;
1439 		object_dir = strndup(id_str_prefix, 2);
1440 		if (object_dir == NULL) {
1441 			err = got_error_from_errno("strdup");
1442 			goto done;
1443 		}
1444 		err = match_loose_object(id, path_objects, object_dir,
1445 		    id_str_prefix, obj_type, repo);
1446 	} else if (len == 1) {
1447 		int i;
1448 		for (i = 0; i < 0xf; i++) {
1449 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1450 			    == -1) {
1451 				err = got_error_from_errno("asprintf");
1452 				goto done;
1453 			}
1454 			err = match_packed_object(id, repo, object_dir,
1455 			    obj_type);
1456 			if (err)
1457 				goto done;
1458 			err = match_loose_object(id, path_objects, object_dir,
1459 			    id_str_prefix, obj_type, repo);
1460 			if (err)
1461 				goto done;
1462 		}
1463 	} else {
1464 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1465 		goto done;
1466 	}
1467 done:
1468 	free(object_dir);
1469 	if (err) {
1470 		free(*id);
1471 		*id = NULL;
1472 	} else if (*id == NULL)
1473 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1474 
1475 	return err;
1476 }
1477 
1478 const struct got_error *
1479 got_repo_match_object_id(struct got_object_id **id, char **label,
1480     const char *id_str, int obj_type, struct got_reflist_head *refs,
1481     struct got_repository *repo)
1482 {
1483 	const struct got_error *err;
1484 	struct got_tag_object *tag;
1485 	struct got_reference *ref = NULL;
1486 
1487 	*id = NULL;
1488 	if (label)
1489 		*label = NULL;
1490 
1491 	if (refs) {
1492 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1493 		    refs, repo);
1494 		if (err == NULL) {
1495 			*id = got_object_id_dup(
1496 			    got_object_tag_get_object_id(tag));
1497 			if (*id == NULL)
1498 				err = got_error_from_errno("got_object_id_dup");
1499 			else if (label && asprintf(label, "refs/tags/%s",
1500 			    got_object_tag_get_name(tag)) == -1) {
1501 				err = got_error_from_errno("asprintf");
1502 				free(*id);
1503 				*id = NULL;
1504 			}
1505 			got_object_tag_close(tag);
1506 			return err;
1507 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1508 		    err->code != GOT_ERR_NO_OBJ)
1509 			return err;
1510 	}
1511 
1512 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1513 	if (err) {
1514 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1515 			return err;
1516 		err = got_ref_open(&ref, repo, id_str, 0);
1517 		if (err != NULL)
1518 			goto done;
1519 		if (label) {
1520 			*label = strdup(got_ref_get_name(ref));
1521 			if (*label == NULL) {
1522 				err = got_error_from_errno("strdup");
1523 				goto done;
1524 			}
1525 		}
1526 		err = got_ref_resolve(id, repo, ref);
1527 	} else if (label) {
1528 		err = got_object_id_str(label, *id);
1529 		if (*label == NULL) {
1530 			err = got_error_from_errno("strdup");
1531 			goto done;
1532 		}
1533 	}
1534 done:
1535 	if (ref)
1536 		got_ref_close(ref);
1537 	return err;
1538 }
1539 
1540 const struct got_error *
1541 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1542     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1543 {
1544 	const struct got_error *err = NULL;
1545 	struct got_reflist_entry *re;
1546 	struct got_object_id *tag_id;
1547 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1548 
1549 	*tag = NULL;
1550 
1551 	TAILQ_FOREACH(re, refs, entry) {
1552 		const char *refname;
1553 		refname = got_ref_get_name(re->ref);
1554 		if (got_ref_is_symbolic(re->ref))
1555 			continue;
1556 		if (strncmp(refname, "refs/tags/", 10) != 0)
1557 			continue;
1558 		if (!name_is_absolute)
1559 			refname += strlen("refs/tags/");
1560 		if (strcmp(refname, name) != 0)
1561 			continue;
1562 		err = got_ref_resolve(&tag_id, repo, re->ref);
1563 		if (err)
1564 			break;
1565 		err = got_object_open_as_tag(tag, repo, tag_id);
1566 		free(tag_id);
1567 		if (err)
1568 			break;
1569 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1570 		    got_object_tag_get_object_type(*tag) == obj_type)
1571 			break;
1572 		got_object_tag_close(*tag);
1573 		*tag = NULL;
1574 	}
1575 
1576 	if (err == NULL && *tag == NULL)
1577 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1578 	return err;
1579 }
1580 
1581 static const struct got_error *
1582 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1583     const char *name, mode_t mode, struct got_object_id *blob_id)
1584 {
1585 	const struct got_error *err = NULL;
1586 
1587 	 *new_te = NULL;
1588 
1589 	*new_te = calloc(1, sizeof(**new_te));
1590 	if (*new_te == NULL)
1591 		return got_error_from_errno("calloc");
1592 
1593 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1594 	    sizeof((*new_te)->name)) {
1595 		err = got_error(GOT_ERR_NO_SPACE);
1596 		goto done;
1597 	}
1598 
1599 	if (S_ISLNK(mode)) {
1600 		(*new_te)->mode = S_IFLNK;
1601 	} else {
1602 		(*new_te)->mode = S_IFREG;
1603 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1604 	}
1605 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1606 done:
1607 	if (err && *new_te) {
1608 		free(*new_te);
1609 		*new_te = NULL;
1610 	}
1611 	return err;
1612 }
1613 
1614 static const struct got_error *
1615 import_file(struct got_tree_entry **new_te, struct dirent *de,
1616     const char *path, struct got_repository *repo)
1617 {
1618 	const struct got_error *err;
1619 	struct got_object_id *blob_id = NULL;
1620 	char *filepath;
1621 	struct stat sb;
1622 
1623 	if (asprintf(&filepath, "%s%s%s", path,
1624 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1625 		return got_error_from_errno("asprintf");
1626 
1627 	if (lstat(filepath, &sb) != 0) {
1628 		err = got_error_from_errno2("lstat", path);
1629 		goto done;
1630 	}
1631 
1632 	err = got_object_blob_create(&blob_id, filepath, repo);
1633 	if (err)
1634 		goto done;
1635 
1636 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1637 	    blob_id);
1638 done:
1639 	free(filepath);
1640 	if (err)
1641 		free(blob_id);
1642 	return err;
1643 }
1644 
1645 static const struct got_error *
1646 insert_tree_entry(struct got_tree_entry *new_te,
1647     struct got_pathlist_head *paths)
1648 {
1649 	const struct got_error *err = NULL;
1650 	struct got_pathlist_entry *new_pe;
1651 
1652 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1653 	if (err)
1654 		return err;
1655 	if (new_pe == NULL)
1656 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1657 	return NULL;
1658 }
1659 
1660 static const struct got_error *write_tree(struct got_object_id **,
1661     const char *, struct got_pathlist_head *, struct got_repository *,
1662     got_repo_import_cb progress_cb, void *progress_arg);
1663 
1664 static const struct got_error *
1665 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1666     const char *path, struct got_pathlist_head *ignores,
1667     struct got_repository *repo,
1668     got_repo_import_cb progress_cb, void *progress_arg)
1669 {
1670 	const struct got_error *err;
1671 	struct got_object_id *id = NULL;
1672 	char *subdirpath;
1673 
1674 	if (asprintf(&subdirpath, "%s%s%s", path,
1675 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1676 		return got_error_from_errno("asprintf");
1677 
1678 	(*new_te) = calloc(1, sizeof(**new_te));
1679 	if (*new_te == NULL)
1680 		return got_error_from_errno("calloc");
1681 	(*new_te)->mode = S_IFDIR;
1682 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1683 	    sizeof((*new_te)->name)) {
1684 		err = got_error(GOT_ERR_NO_SPACE);
1685 		goto done;
1686 	}
1687 	err = write_tree(&id, subdirpath, ignores,  repo,
1688 	    progress_cb, progress_arg);
1689 	if (err)
1690 		goto done;
1691 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1692 	
1693 done:
1694 	free(id);
1695 	free(subdirpath);
1696 	if (err) {
1697 		free(*new_te);
1698 		*new_te = NULL;
1699 	}
1700 	return err;
1701 }
1702 
1703 static const struct got_error *
1704 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1705     struct got_pathlist_head *ignores, struct got_repository *repo,
1706     got_repo_import_cb progress_cb, void *progress_arg)
1707 {
1708 	const struct got_error *err = NULL;
1709 	DIR *dir;
1710 	struct dirent *de;
1711 	int nentries;
1712 	struct got_tree_entry *new_te = NULL;
1713 	struct got_pathlist_head paths;
1714 	struct got_pathlist_entry *pe;
1715 
1716 	*new_tree_id = NULL;
1717 
1718 	TAILQ_INIT(&paths);
1719 
1720 	dir = opendir(path_dir);
1721 	if (dir == NULL) {
1722 		err = got_error_from_errno2("opendir", path_dir);
1723 		goto done;
1724 	}
1725 
1726 	nentries = 0;
1727 	while ((de = readdir(dir)) != NULL) {
1728 		int ignore = 0;
1729 		int type;
1730 
1731 		if (strcmp(de->d_name, ".") == 0 ||
1732 		    strcmp(de->d_name, "..") == 0)
1733 			continue;
1734 
1735 		TAILQ_FOREACH(pe, ignores, entry) {
1736 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1737 				ignore = 1;
1738 				break;
1739 			}
1740 		}
1741 		if (ignore)
1742 			continue;
1743 
1744 		err = got_path_dirent_type(&type, path_dir, de);
1745 		if (err)
1746 			goto done;
1747 
1748 		if (type == DT_DIR) {
1749 			err = import_subdir(&new_te, de, path_dir,
1750 			    ignores, repo, progress_cb, progress_arg);
1751 			if (err) {
1752 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1753 					goto done;
1754 				err = NULL;
1755 				continue;
1756 			}
1757 		} else if (type == DT_REG || type == DT_LNK) {
1758 			err = import_file(&new_te, de, path_dir, repo);
1759 			if (err)
1760 				goto done;
1761 		} else
1762 			continue;
1763 
1764 		err = insert_tree_entry(new_te, &paths);
1765 		if (err)
1766 			goto done;
1767 		nentries++;
1768 	}
1769 
1770 	if (TAILQ_EMPTY(&paths)) {
1771 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1772 		    "cannot create tree without any entries");
1773 		goto done;
1774 	}
1775 
1776 	TAILQ_FOREACH(pe, &paths, entry) {
1777 		struct got_tree_entry *te = pe->data;
1778 		char *path;
1779 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1780 			continue;
1781 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1782 			err = got_error_from_errno("asprintf");
1783 			goto done;
1784 		}
1785 		err = (*progress_cb)(progress_arg, path);
1786 		free(path);
1787 		if (err)
1788 			goto done;
1789 	}
1790 
1791 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1792 done:
1793 	if (dir)
1794 		closedir(dir);
1795 	got_pathlist_free(&paths);
1796 	return err;
1797 }
1798 
1799 const struct got_error *
1800 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1801     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1802     struct got_repository *repo, got_repo_import_cb progress_cb,
1803     void *progress_arg)
1804 {
1805 	const struct got_error *err;
1806 	struct got_object_id *new_tree_id;
1807 
1808 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1809 	    progress_cb, progress_arg);
1810 	if (err)
1811 		return err;
1812 
1813 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1814 	    author, time(NULL), author, time(NULL), logmsg, repo);
1815 	free(new_tree_id);
1816 	return err;
1817 }
1818 
1819 const struct got_error *
1820 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
1821     struct got_repository *repo)
1822 {
1823 	const struct got_error *err = NULL;
1824 	char *path_objects = NULL, *path = NULL;
1825 	DIR *dir = NULL;
1826 	struct got_object_id id;
1827 	int i;
1828 
1829 	*nobjects = 0;
1830 	*ondisk_size = 0;
1831 
1832 	path_objects = got_repo_get_path_objects(repo);
1833 	if (path_objects == NULL)
1834 		return got_error_from_errno("got_repo_get_path_objects");
1835 
1836 	for (i = 0; i <= 0xff; i++) {
1837 		struct dirent *dent;
1838 
1839 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
1840 			err = got_error_from_errno("asprintf");
1841 			break;
1842 		}
1843 
1844 		dir = opendir(path);
1845 		if (dir == NULL) {
1846 			if (errno == ENOENT) {
1847 				err = NULL;
1848 				continue;
1849 			}
1850 			err = got_error_from_errno2("opendir", path);
1851 			break;
1852 		}
1853 
1854 		while ((dent = readdir(dir)) != NULL) {
1855 			char *id_str;
1856 			int fd;
1857 			struct stat sb;
1858 
1859 			if (strcmp(dent->d_name, ".") == 0 ||
1860 			    strcmp(dent->d_name, "..") == 0)
1861 				continue;
1862 
1863 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
1864 				err = got_error_from_errno("asprintf");
1865 				goto done;
1866 			}
1867 
1868 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
1869 				free(id_str);
1870 				continue;
1871 			}
1872 			free(id_str);
1873 
1874 			err = got_object_open_loose_fd(&fd, &id, repo);
1875 			if (err)
1876 				goto done;
1877 
1878 			if (fstat(fd, &sb) == -1) {
1879 				err = got_error_from_errno("fstat");
1880 				close(fd);
1881 				goto done;
1882 			}
1883 			(*nobjects)++;
1884 			(*ondisk_size) += sb.st_size;
1885 
1886 			if (close(fd) == -1) {
1887 				err = got_error_from_errno("close");
1888 				goto done;
1889 			}
1890 		}
1891 
1892 		if (closedir(dir) != 0) {
1893 			err = got_error_from_errno("closedir");
1894 			goto done;
1895 		}
1896 		dir = NULL;
1897 
1898 		free(path);
1899 		path = NULL;
1900 	}
1901 done:
1902 	if (dir && closedir(dir) != 0 && err == NULL)
1903 		err = got_error_from_errno("closedir");
1904 
1905 	if (err) {
1906 		*nobjects = 0;
1907 		*ondisk_size = 0;
1908 	}
1909 	free(path_objects);
1910 	free(path);
1911 	return err;
1912 }
1913 
1914 const struct got_error *
1915 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
1916     off_t *total_packsize, struct got_repository *repo)
1917 {
1918 	const struct got_error *err = NULL;
1919 	DIR *packdir = NULL;
1920 	struct dirent *dent;
1921 	struct got_packidx *packidx = NULL;
1922 	char *path_packidx;
1923 	char *path_packfile;
1924 	int packdir_fd;
1925 	struct stat sb;
1926 
1927 	*npackfiles = 0;
1928 	*nobjects = 0;
1929 	*total_packsize = 0;
1930 
1931 	packdir_fd = openat(got_repo_get_fd(repo),
1932 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1933 	if (packdir_fd == -1) {
1934 		return got_error_from_errno_fmt("openat: %s/%s",
1935 		    got_repo_get_path_git_dir(repo),
1936 		    GOT_OBJECTS_PACK_DIR);
1937 	}
1938 
1939 	packdir = fdopendir(packdir_fd);
1940 	if (packdir == NULL) {
1941 		err = got_error_from_errno("fdopendir");
1942 		goto done;
1943 	}
1944 
1945 	while ((dent = readdir(packdir)) != NULL) {
1946 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1947 			continue;
1948 
1949 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1950 		    dent->d_name) == -1) {
1951 			err = got_error_from_errno("asprintf");
1952 			goto done;
1953 		}
1954 
1955 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1956 		    path_packidx, 0);
1957 		free(path_packidx);
1958 		if (err)
1959 			goto done;
1960 
1961 		if (fstat(packidx->fd, &sb) == -1)
1962 			goto done;
1963 		*total_packsize += sb.st_size;
1964 
1965 		err = got_packidx_get_packfile_path(&path_packfile, packidx);
1966 		if (err)
1967 			goto done;
1968 
1969 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
1970 		    0) == -1) {
1971 			free(path_packfile);
1972 			goto done;
1973 		}
1974 		free(path_packfile);
1975 		*total_packsize += sb.st_size;
1976 
1977 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
1978 
1979 		(*npackfiles)++;
1980 
1981 		got_packidx_close(packidx);
1982 		packidx = NULL;
1983 	}
1984 done:
1985 	if (packidx)
1986 		got_packidx_close(packidx);
1987 	if (packdir && closedir(packdir) != 0 && err == NULL)
1988 		err = got_error_from_errno("closedir");
1989 	if (err) {
1990 		*npackfiles = 0;
1991 		*nobjects = 0;
1992 		*total_packsize = 0;
1993 	}
1994 	return err;
1995 }