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 && close(repo->gitdir_fd) == -1 &&
756 	    err == NULL)
757 		err = got_error_from_errno("close");
758 
759 	if (repo->gotconfig)
760 		got_gotconfig_free(repo->gotconfig);
761 	free(repo->gitconfig_author_name);
762 	free(repo->gitconfig_author_email);
763 	for (i = 0; i < repo->ngitconfig_remotes; i++)
764 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
765 	free(repo->gitconfig_remotes);
766 	for (i = 0; i < repo->nextensions; i++)
767 		free(repo->extensions[i]);
768 	free(repo->extensions);
769 	free(repo);
770 
771 	return err;
772 }
773 
774 void
775 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
776 {
777 	int i;
778 
779 	free(repo->name);
780 	repo->name = NULL;
781 	free(repo->url);
782 	repo->url = NULL;
783 	for (i = 0; i < repo->nbranches; i++)
784 		free(repo->branches[i]);
785 	free(repo->branches);
786 	repo->branches = NULL;
787 	repo->nbranches = 0;
788 }
789 
790 const struct got_error *
791 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
792     const char *input_path)
793 {
794 	const struct got_error *err = NULL;
795 	const char *repo_abspath = NULL;
796 	size_t repolen, len;
797 	char *canonpath, *path = NULL;
798 
799 	*in_repo_path = NULL;
800 
801 	canonpath = strdup(input_path);
802 	if (canonpath == NULL) {
803 		err = got_error_from_errno("strdup");
804 		goto done;
805 	}
806 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
807 	if (err)
808 		goto done;
809 
810 	repo_abspath = got_repo_get_path(repo);
811 
812 	if (canonpath[0] == '\0') {
813 		path = strdup(canonpath);
814 		if (path == NULL) {
815 			err = got_error_from_errno("strdup");
816 			goto done;
817 		}
818 	} else {
819 		path = realpath(canonpath, NULL);
820 		if (path == NULL) {
821 			if (errno != ENOENT) {
822 				err = got_error_from_errno2("realpath",
823 				    canonpath);
824 				goto done;
825 			}
826 			/*
827 			 * Path is not on disk.
828 			 * Assume it is already relative to repository root.
829 			 */
830 			path = strdup(canonpath);
831 			if (path == NULL) {
832 				err = got_error_from_errno("strdup");
833 				goto done;
834 			}
835 		}
836 
837 		repolen = strlen(repo_abspath);
838 		len = strlen(path);
839 
840 
841 		if (strcmp(path, repo_abspath) == 0) {
842 			free(path);
843 			path = strdup("");
844 			if (path == NULL) {
845 				err = got_error_from_errno("strdup");
846 				goto done;
847 			}
848 		} else if (len > repolen &&
849 		    got_path_is_child(path, repo_abspath, repolen)) {
850 			/* Matched an on-disk path inside repository. */
851 			if (got_repo_is_bare(repo)) {
852 				/*
853 				 * Matched an on-disk path inside repository
854 				 * database. Treat input as repository-relative.
855 				 */
856 				 free(path);
857 				 path = canonpath;
858 				 canonpath = NULL;
859 			} else {
860 				char *child;
861 				/* Strip common prefix with repository path. */
862 				err = got_path_skip_common_ancestor(&child,
863 				    repo_abspath, path);
864 				if (err)
865 					goto done;
866 				free(path);
867 				path = child;
868 			}
869 		} else {
870 			/*
871 			 * Matched unrelated on-disk path.
872 			 * Treat input as repository-relative.
873 			 */
874 			 free(path);
875 			 path = canonpath;
876 			 canonpath = NULL;
877 		}
878 	}
879 
880 	/* Make in-repository path absolute */
881 	if (path[0] != '/') {
882 		char *abspath;
883 		if (asprintf(&abspath, "/%s", path) == -1) {
884 			err = got_error_from_errno("asprintf");
885 			goto done;
886 		}
887 		free(path);
888 		path = abspath;
889 	}
890 
891 done:
892 	free(canonpath);
893 	if (err)
894 		free(path);
895 	else
896 		*in_repo_path = path;
897 	return err;
898 }
899 
900 static const struct got_error *
901 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
902     const char *path_packidx)
903 {
904 	const struct got_error *err = NULL;
905 	size_t i;
906 
907 	for (i = 0; i < repo->pack_cache_size; i++) {
908 		if (repo->packidx_cache[i] == NULL)
909 			break;
910 		if (strcmp(repo->packidx_cache[i]->path_packidx,
911 		    path_packidx) == 0) {
912 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
913 		}
914 	}
915 	if (i == repo->pack_cache_size) {
916 		err = got_packidx_close(repo->packidx_cache[i - 1]);
917 		if (err)
918 			return err;
919 	}
920 
921 	/*
922 	 * Insert the new pack index at the front so it will
923 	 * be searched first in the future.
924 	 */
925 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
926 	    sizeof(repo->packidx_cache) -
927 	    sizeof(repo->packidx_cache[0]));
928 	repo->packidx_cache[0] = packidx;
929 
930 	return NULL;
931 }
932 
933 static int
934 is_packidx_filename(const char *name, size_t len)
935 {
936 	if (len != GOT_PACKIDX_NAMELEN)
937 		return 0;
938 
939 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
940 		return 0;
941 
942 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
943 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
944 		return 0;
945 
946 	return 1;
947 }
948 
949 const struct got_error *
950 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
951     struct got_repository *repo, struct got_object_id *id)
952 {
953 	const struct got_error *err;
954 	DIR *packdir = NULL;
955 	struct dirent *dent;
956 	char *path_packidx;
957 	size_t i;
958 	int packdir_fd;
959 
960 	/* Search pack index cache. */
961 	for (i = 0; i < repo->pack_cache_size; i++) {
962 		if (repo->packidx_cache[i] == NULL)
963 			break;
964 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
965 		if (*idx != -1) {
966 			*packidx = repo->packidx_cache[i];
967 			/*
968 			 * Move this cache entry to the front. Repeatedly
969 			 * searching a wrong pack index can be expensive.
970 			 */
971 			if (i > 0) {
972 				struct got_packidx *p;
973 				p = repo->packidx_cache[0];
974 				repo->packidx_cache[0] = *packidx;
975 				repo->packidx_cache[i] = p;
976 			}
977 			return NULL;
978 		}
979 	}
980 	/* No luck. Search the filesystem. */
981 
982 	packdir_fd = openat(got_repo_get_fd(repo),
983 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
984 	if (packdir_fd == -1) {
985 		if (errno == ENOENT)
986 			err = got_error_no_obj(id);
987 		else
988 			err = got_error_from_errno_fmt("openat: %s/%s",
989 			    got_repo_get_path_git_dir(repo),
990 			    GOT_OBJECTS_PACK_DIR);
991 		goto done;
992 	}
993 
994 	packdir = fdopendir(packdir_fd);
995 	if (packdir == NULL) {
996 		err = got_error_from_errno("fdopendir");
997 		goto done;
998 	}
999 
1000 	while ((dent = readdir(packdir)) != NULL) {
1001 		int is_cached = 0;
1002 
1003 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1004 			continue;
1005 
1006 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1007 		    dent->d_name) == -1) {
1008 			err = got_error_from_errno("asprintf");
1009 			goto done;
1010 		}
1011 
1012 		for (i = 0; i < repo->pack_cache_size; i++) {
1013 			if (repo->packidx_cache[i] == NULL)
1014 				break;
1015 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1016 			    path_packidx) == 0) {
1017 				is_cached = 1;
1018 				break;
1019 			}
1020 		}
1021 		if (is_cached) {
1022 			free(path_packidx);
1023 			continue; /* already searched */
1024 		}
1025 
1026 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1027 		    path_packidx, 0);
1028 		if (err) {
1029 			free(path_packidx);
1030 			goto done;
1031 		}
1032 
1033 		err = cache_packidx(repo, *packidx, path_packidx);
1034 		free(path_packidx);
1035 		if (err)
1036 			goto done;
1037 
1038 		*idx = got_packidx_get_object_idx(*packidx, id);
1039 		if (*idx != -1) {
1040 			err = NULL; /* found the object */
1041 			goto done;
1042 		}
1043 	}
1044 
1045 	err = got_error_no_obj(id);
1046 done:
1047 	if (packdir && closedir(packdir) != 0 && err == NULL)
1048 		err = got_error_from_errno("closedir");
1049 	return err;
1050 }
1051 
1052 static const struct got_error *
1053 read_packfile_hdr(int fd, struct got_packidx *packidx)
1054 {
1055 	const struct got_error *err = NULL;
1056 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1057 	struct got_packfile_hdr hdr;
1058 	ssize_t n;
1059 
1060 	n = read(fd, &hdr, sizeof(hdr));
1061 	if (n < 0)
1062 		return got_error_from_errno("read");
1063 	if (n != sizeof(hdr))
1064 		return got_error(GOT_ERR_BAD_PACKFILE);
1065 
1066 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1067 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1068 	    be32toh(hdr.nobjects) != totobj)
1069 		err = got_error(GOT_ERR_BAD_PACKFILE);
1070 
1071 	return err;
1072 }
1073 
1074 static const struct got_error *
1075 open_packfile(int *fd, struct got_repository *repo,
1076     const char *relpath, struct got_packidx *packidx)
1077 {
1078 	const struct got_error *err = NULL;
1079 
1080 	*fd = openat(got_repo_get_fd(repo), relpath, O_RDONLY | O_NOFOLLOW);
1081 	if (*fd == -1)
1082 		return got_error_from_errno_fmt("openat: %s/%s",
1083 		    got_repo_get_path_git_dir(repo), relpath);
1084 
1085 	if (packidx) {
1086 		err = read_packfile_hdr(*fd, packidx);
1087 		if (err) {
1088 			close(*fd);
1089 			*fd = -1;
1090 		}
1091 	}
1092 
1093 	return err;
1094 }
1095 
1096 const struct got_error *
1097 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1098     const char *path_packfile, struct got_packidx *packidx)
1099 {
1100 	const struct got_error *err = NULL;
1101 	struct got_pack *pack = NULL;
1102 	struct stat sb;
1103 	size_t i;
1104 
1105 	if (packp)
1106 		*packp = NULL;
1107 
1108 	for (i = 0; i < repo->pack_cache_size; i++) {
1109 		pack = &repo->packs[i];
1110 		if (pack->path_packfile == NULL)
1111 			break;
1112 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1113 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1114 	}
1115 
1116 	if (i == repo->pack_cache_size) {
1117 		err = got_pack_close(&repo->packs[i - 1]);
1118 		if (err)
1119 			return err;
1120 		memmove(&repo->packs[1], &repo->packs[0],
1121 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1122 		i = 0;
1123 	}
1124 
1125 	pack = &repo->packs[i];
1126 
1127 	pack->path_packfile = strdup(path_packfile);
1128 	if (pack->path_packfile == NULL) {
1129 		err = got_error_from_errno("strdup");
1130 		goto done;
1131 	}
1132 
1133 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1134 	if (err)
1135 		goto done;
1136 
1137 	if (fstat(pack->fd, &sb) != 0) {
1138 		err = got_error_from_errno("fstat");
1139 		goto done;
1140 	}
1141 	pack->filesize = sb.st_size;
1142 
1143 	pack->privsep_child = NULL;
1144 
1145 #ifndef GOT_PACK_NO_MMAP
1146 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1147 	    pack->fd, 0);
1148 	if (pack->map == MAP_FAILED) {
1149 		if (errno != ENOMEM) {
1150 			err = got_error_from_errno("mmap");
1151 			goto done;
1152 		}
1153 		pack->map = NULL; /* fall back to read(2) */
1154 	}
1155 #endif
1156 done:
1157 	if (err) {
1158 		if (pack) {
1159 			free(pack->path_packfile);
1160 			memset(pack, 0, sizeof(*pack));
1161 		}
1162 	} else if (packp)
1163 		*packp = pack;
1164 	return err;
1165 }
1166 
1167 struct got_pack *
1168 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1169 {
1170 	struct got_pack *pack = NULL;
1171 	size_t i;
1172 
1173 	for (i = 0; i < repo->pack_cache_size; i++) {
1174 		pack = &repo->packs[i];
1175 		if (pack->path_packfile == NULL)
1176 			break;
1177 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1178 			return pack;
1179 	}
1180 
1181 	return NULL;
1182 }
1183 
1184 const struct got_error *
1185 got_repo_init(const char *repo_path)
1186 {
1187 	const struct got_error *err = NULL;
1188 	const char *dirnames[] = {
1189 		GOT_OBJECTS_DIR,
1190 		GOT_OBJECTS_PACK_DIR,
1191 		GOT_REFS_DIR,
1192 	};
1193 	const char *description_str = "Unnamed repository; "
1194 	    "edit this file 'description' to name the repository.";
1195 	const char *headref_str = "ref: refs/heads/main";
1196 	const char *gitconfig_str = "[core]\n"
1197 	    "\trepositoryformatversion = 0\n"
1198 	    "\tfilemode = true\n"
1199 	    "\tbare = true\n";
1200 	char *path;
1201 	size_t i;
1202 
1203 	if (!got_path_dir_is_empty(repo_path))
1204 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1205 
1206 	for (i = 0; i < nitems(dirnames); i++) {
1207 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1208 			return got_error_from_errno("asprintf");
1209 		}
1210 		err = got_path_mkdir(path);
1211 		free(path);
1212 		if (err)
1213 			return err;
1214 	}
1215 
1216 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1217 		return got_error_from_errno("asprintf");
1218 	err = got_path_create_file(path, description_str);
1219 	free(path);
1220 	if (err)
1221 		return err;
1222 
1223 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1224 		return got_error_from_errno("asprintf");
1225 	err = got_path_create_file(path, headref_str);
1226 	free(path);
1227 	if (err)
1228 		return err;
1229 
1230 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1231 		return got_error_from_errno("asprintf");
1232 	err = got_path_create_file(path, gitconfig_str);
1233 	free(path);
1234 	if (err)
1235 		return err;
1236 
1237 	return NULL;
1238 }
1239 
1240 static const struct got_error *
1241 match_packed_object(struct got_object_id **unique_id,
1242     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1243 {
1244 	const struct got_error *err = NULL;
1245 	DIR *packdir = NULL;
1246 	struct dirent *dent;
1247 	char *path_packidx;
1248 	struct got_object_id_queue matched_ids;
1249 	int packdir_fd;
1250 
1251 	SIMPLEQ_INIT(&matched_ids);
1252 
1253 	packdir_fd = openat(got_repo_get_fd(repo),
1254 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1255 	if (packdir_fd == -1) {
1256 		if (errno != ENOENT)
1257 			err = got_error_from_errno2("openat", GOT_OBJECTS_PACK_DIR);
1258 		goto done;
1259 	}
1260 
1261 	packdir = fdopendir(packdir_fd);
1262 	if (packdir == NULL) {
1263 		err = got_error_from_errno("fdopendir");
1264 		goto done;
1265 	}
1266 
1267 	while ((dent = readdir(packdir)) != NULL) {
1268 		struct got_packidx *packidx;
1269 		struct got_object_qid *qid;
1270 
1271 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1272 			continue;
1273 
1274 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1275 		    dent->d_name) == -1) {
1276 			err = got_error_from_errno("strdup");
1277 			break;
1278 		}
1279 
1280 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1281 		    path_packidx, 0);
1282 		free(path_packidx);
1283 		if (err)
1284 			break;
1285 
1286 		err = got_packidx_match_id_str_prefix(&matched_ids,
1287 		    packidx, id_str_prefix);
1288 		if (err) {
1289 			got_packidx_close(packidx);
1290 			break;
1291 		}
1292 		err = got_packidx_close(packidx);
1293 		if (err)
1294 			break;
1295 
1296 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1297 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1298 				int matched_type;
1299 				err = got_object_get_type(&matched_type, repo,
1300 				    qid->id);
1301 				if (err)
1302 					goto done;
1303 				if (matched_type != obj_type)
1304 					continue;
1305 			}
1306 			if (*unique_id == NULL) {
1307 				*unique_id = got_object_id_dup(qid->id);
1308 				if (*unique_id == NULL) {
1309 					err = got_error_from_errno("malloc");
1310 					goto done;
1311 				}
1312 			} else {
1313 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1314 					continue; /* packed multiple times */
1315 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1316 				goto done;
1317 			}
1318 		}
1319 	}
1320 done:
1321 	got_object_id_queue_free(&matched_ids);
1322 	if (packdir && closedir(packdir) != 0 && err == NULL)
1323 		err = got_error_from_errno("closedir");
1324 	if (err) {
1325 		free(*unique_id);
1326 		*unique_id = NULL;
1327 	}
1328 	return err;
1329 }
1330 
1331 static const struct got_error *
1332 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1333     const char *object_dir, const char *id_str_prefix, int obj_type,
1334     struct got_repository *repo)
1335 {
1336 	const struct got_error *err = NULL;
1337 	char *path;
1338 	DIR *dir = NULL;
1339 	struct dirent *dent;
1340 	struct got_object_id id;
1341 
1342 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1343 		err = got_error_from_errno("asprintf");
1344 		goto done;
1345 	}
1346 
1347 	dir = opendir(path);
1348 	if (dir == NULL) {
1349 		if (errno == ENOENT) {
1350 			err = NULL;
1351 			goto done;
1352 		}
1353 		err = got_error_from_errno2("opendir", path);
1354 		goto done;
1355 	}
1356 	while ((dent = readdir(dir)) != NULL) {
1357 		char *id_str;
1358 		int cmp;
1359 
1360 		if (strcmp(dent->d_name, ".") == 0 ||
1361 		    strcmp(dent->d_name, "..") == 0)
1362 			continue;
1363 
1364 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1365 			err = got_error_from_errno("asprintf");
1366 			goto done;
1367 		}
1368 
1369 		if (!got_parse_sha1_digest(id.sha1, id_str))
1370 			continue;
1371 
1372 		/*
1373 		 * Directory entries do not necessarily appear in
1374 		 * sorted order, so we must iterate over all of them.
1375 		 */
1376 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1377 		if (cmp != 0) {
1378 			free(id_str);
1379 			continue;
1380 		}
1381 
1382 		if (*unique_id == NULL) {
1383 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1384 				int matched_type;
1385 				err = got_object_get_type(&matched_type, repo,
1386 				    &id);
1387 				if (err)
1388 					goto done;
1389 				if (matched_type != obj_type)
1390 					continue;
1391 			}
1392 			*unique_id = got_object_id_dup(&id);
1393 			if (*unique_id == NULL) {
1394 				err = got_error_from_errno("got_object_id_dup");
1395 				free(id_str);
1396 				goto done;
1397 			}
1398 		} else {
1399 			if (got_object_id_cmp(*unique_id, &id) == 0)
1400 				continue; /* both packed and loose */
1401 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1402 			free(id_str);
1403 			goto done;
1404 		}
1405 	}
1406 done:
1407 	if (dir && closedir(dir) != 0 && err == NULL)
1408 		err = got_error_from_errno("closedir");
1409 	if (err) {
1410 		free(*unique_id);
1411 		*unique_id = NULL;
1412 	}
1413 	free(path);
1414 	return err;
1415 }
1416 
1417 const struct got_error *
1418 got_repo_match_object_id_prefix(struct got_object_id **id,
1419     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1420 {
1421 	const struct got_error *err = NULL;
1422 	char *path_objects = got_repo_get_path_objects(repo);
1423 	char *object_dir = NULL;
1424 	size_t len;
1425 	int i;
1426 
1427 	*id = NULL;
1428 
1429 	for (i = 0; i < strlen(id_str_prefix); i++) {
1430 		if (isxdigit((unsigned char)id_str_prefix[i]))
1431 			continue;
1432 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1433 	}
1434 
1435 	len = strlen(id_str_prefix);
1436 	if (len >= 2) {
1437 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1438 		if (err)
1439 			goto done;
1440 		object_dir = strndup(id_str_prefix, 2);
1441 		if (object_dir == NULL) {
1442 			err = got_error_from_errno("strdup");
1443 			goto done;
1444 		}
1445 		err = match_loose_object(id, path_objects, object_dir,
1446 		    id_str_prefix, obj_type, repo);
1447 	} else if (len == 1) {
1448 		int i;
1449 		for (i = 0; i < 0xf; i++) {
1450 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1451 			    == -1) {
1452 				err = got_error_from_errno("asprintf");
1453 				goto done;
1454 			}
1455 			err = match_packed_object(id, repo, object_dir,
1456 			    obj_type);
1457 			if (err)
1458 				goto done;
1459 			err = match_loose_object(id, path_objects, object_dir,
1460 			    id_str_prefix, obj_type, repo);
1461 			if (err)
1462 				goto done;
1463 		}
1464 	} else {
1465 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1466 		goto done;
1467 	}
1468 done:
1469 	free(object_dir);
1470 	if (err) {
1471 		free(*id);
1472 		*id = NULL;
1473 	} else if (*id == NULL)
1474 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1475 
1476 	return err;
1477 }
1478 
1479 const struct got_error *
1480 got_repo_match_object_id(struct got_object_id **id, char **label,
1481     const char *id_str, int obj_type, struct got_reflist_head *refs,
1482     struct got_repository *repo)
1483 {
1484 	const struct got_error *err;
1485 	struct got_tag_object *tag;
1486 	struct got_reference *ref = NULL;
1487 
1488 	*id = NULL;
1489 	if (label)
1490 		*label = NULL;
1491 
1492 	if (refs) {
1493 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1494 		    refs, repo);
1495 		if (err == NULL) {
1496 			*id = got_object_id_dup(
1497 			    got_object_tag_get_object_id(tag));
1498 			if (*id == NULL)
1499 				err = got_error_from_errno("got_object_id_dup");
1500 			else if (label && asprintf(label, "refs/tags/%s",
1501 			    got_object_tag_get_name(tag)) == -1) {
1502 				err = got_error_from_errno("asprintf");
1503 				free(*id);
1504 				*id = NULL;
1505 			}
1506 			got_object_tag_close(tag);
1507 			return err;
1508 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1509 		    err->code != GOT_ERR_NO_OBJ)
1510 			return err;
1511 	}
1512 
1513 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1514 	if (err) {
1515 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1516 			return err;
1517 		err = got_ref_open(&ref, repo, id_str, 0);
1518 		if (err != NULL)
1519 			goto done;
1520 		if (label) {
1521 			*label = strdup(got_ref_get_name(ref));
1522 			if (*label == NULL) {
1523 				err = got_error_from_errno("strdup");
1524 				goto done;
1525 			}
1526 		}
1527 		err = got_ref_resolve(id, repo, ref);
1528 	} else if (label) {
1529 		err = got_object_id_str(label, *id);
1530 		if (*label == NULL) {
1531 			err = got_error_from_errno("strdup");
1532 			goto done;
1533 		}
1534 	}
1535 done:
1536 	if (ref)
1537 		got_ref_close(ref);
1538 	return err;
1539 }
1540 
1541 const struct got_error *
1542 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1543     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1544 {
1545 	const struct got_error *err = NULL;
1546 	struct got_reflist_entry *re;
1547 	struct got_object_id *tag_id;
1548 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1549 
1550 	*tag = NULL;
1551 
1552 	TAILQ_FOREACH(re, refs, entry) {
1553 		const char *refname;
1554 		refname = got_ref_get_name(re->ref);
1555 		if (got_ref_is_symbolic(re->ref))
1556 			continue;
1557 		if (strncmp(refname, "refs/tags/", 10) != 0)
1558 			continue;
1559 		if (!name_is_absolute)
1560 			refname += strlen("refs/tags/");
1561 		if (strcmp(refname, name) != 0)
1562 			continue;
1563 		err = got_ref_resolve(&tag_id, repo, re->ref);
1564 		if (err)
1565 			break;
1566 		err = got_object_open_as_tag(tag, repo, tag_id);
1567 		free(tag_id);
1568 		if (err)
1569 			break;
1570 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1571 		    got_object_tag_get_object_type(*tag) == obj_type)
1572 			break;
1573 		got_object_tag_close(*tag);
1574 		*tag = NULL;
1575 	}
1576 
1577 	if (err == NULL && *tag == NULL)
1578 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1579 	return err;
1580 }
1581 
1582 static const struct got_error *
1583 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1584     const char *name, mode_t mode, struct got_object_id *blob_id)
1585 {
1586 	const struct got_error *err = NULL;
1587 
1588 	 *new_te = NULL;
1589 
1590 	*new_te = calloc(1, sizeof(**new_te));
1591 	if (*new_te == NULL)
1592 		return got_error_from_errno("calloc");
1593 
1594 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1595 	    sizeof((*new_te)->name)) {
1596 		err = got_error(GOT_ERR_NO_SPACE);
1597 		goto done;
1598 	}
1599 
1600 	if (S_ISLNK(mode)) {
1601 		(*new_te)->mode = S_IFLNK;
1602 	} else {
1603 		(*new_te)->mode = S_IFREG;
1604 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1605 	}
1606 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1607 done:
1608 	if (err && *new_te) {
1609 		free(*new_te);
1610 		*new_te = NULL;
1611 	}
1612 	return err;
1613 }
1614 
1615 static const struct got_error *
1616 import_file(struct got_tree_entry **new_te, struct dirent *de,
1617     const char *path, struct got_repository *repo)
1618 {
1619 	const struct got_error *err;
1620 	struct got_object_id *blob_id = NULL;
1621 	char *filepath;
1622 	struct stat sb;
1623 
1624 	if (asprintf(&filepath, "%s%s%s", path,
1625 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1626 		return got_error_from_errno("asprintf");
1627 
1628 	if (lstat(filepath, &sb) != 0) {
1629 		err = got_error_from_errno2("lstat", path);
1630 		goto done;
1631 	}
1632 
1633 	err = got_object_blob_create(&blob_id, filepath, repo);
1634 	if (err)
1635 		goto done;
1636 
1637 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1638 	    blob_id);
1639 done:
1640 	free(filepath);
1641 	if (err)
1642 		free(blob_id);
1643 	return err;
1644 }
1645 
1646 static const struct got_error *
1647 insert_tree_entry(struct got_tree_entry *new_te,
1648     struct got_pathlist_head *paths)
1649 {
1650 	const struct got_error *err = NULL;
1651 	struct got_pathlist_entry *new_pe;
1652 
1653 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1654 	if (err)
1655 		return err;
1656 	if (new_pe == NULL)
1657 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1658 	return NULL;
1659 }
1660 
1661 static const struct got_error *write_tree(struct got_object_id **,
1662     const char *, struct got_pathlist_head *, struct got_repository *,
1663     got_repo_import_cb progress_cb, void *progress_arg);
1664 
1665 static const struct got_error *
1666 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1667     const char *path, struct got_pathlist_head *ignores,
1668     struct got_repository *repo,
1669     got_repo_import_cb progress_cb, void *progress_arg)
1670 {
1671 	const struct got_error *err;
1672 	struct got_object_id *id = NULL;
1673 	char *subdirpath;
1674 
1675 	if (asprintf(&subdirpath, "%s%s%s", path,
1676 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1677 		return got_error_from_errno("asprintf");
1678 
1679 	(*new_te) = calloc(1, sizeof(**new_te));
1680 	if (*new_te == NULL)
1681 		return got_error_from_errno("calloc");
1682 	(*new_te)->mode = S_IFDIR;
1683 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1684 	    sizeof((*new_te)->name)) {
1685 		err = got_error(GOT_ERR_NO_SPACE);
1686 		goto done;
1687 	}
1688 	err = write_tree(&id, subdirpath, ignores,  repo,
1689 	    progress_cb, progress_arg);
1690 	if (err)
1691 		goto done;
1692 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1693 	
1694 done:
1695 	free(id);
1696 	free(subdirpath);
1697 	if (err) {
1698 		free(*new_te);
1699 		*new_te = NULL;
1700 	}
1701 	return err;
1702 }
1703 
1704 static const struct got_error *
1705 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1706     struct got_pathlist_head *ignores, struct got_repository *repo,
1707     got_repo_import_cb progress_cb, void *progress_arg)
1708 {
1709 	const struct got_error *err = NULL;
1710 	DIR *dir;
1711 	struct dirent *de;
1712 	int nentries;
1713 	struct got_tree_entry *new_te = NULL;
1714 	struct got_pathlist_head paths;
1715 	struct got_pathlist_entry *pe;
1716 
1717 	*new_tree_id = NULL;
1718 
1719 	TAILQ_INIT(&paths);
1720 
1721 	dir = opendir(path_dir);
1722 	if (dir == NULL) {
1723 		err = got_error_from_errno2("opendir", path_dir);
1724 		goto done;
1725 	}
1726 
1727 	nentries = 0;
1728 	while ((de = readdir(dir)) != NULL) {
1729 		int ignore = 0;
1730 		int type;
1731 
1732 		if (strcmp(de->d_name, ".") == 0 ||
1733 		    strcmp(de->d_name, "..") == 0)
1734 			continue;
1735 
1736 		TAILQ_FOREACH(pe, ignores, entry) {
1737 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1738 				ignore = 1;
1739 				break;
1740 			}
1741 		}
1742 		if (ignore)
1743 			continue;
1744 
1745 		err = got_path_dirent_type(&type, path_dir, de);
1746 		if (err)
1747 			goto done;
1748 
1749 		if (type == DT_DIR) {
1750 			err = import_subdir(&new_te, de, path_dir,
1751 			    ignores, repo, progress_cb, progress_arg);
1752 			if (err) {
1753 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1754 					goto done;
1755 				err = NULL;
1756 				continue;
1757 			}
1758 		} else if (type == DT_REG || type == DT_LNK) {
1759 			err = import_file(&new_te, de, path_dir, repo);
1760 			if (err)
1761 				goto done;
1762 		} else
1763 			continue;
1764 
1765 		err = insert_tree_entry(new_te, &paths);
1766 		if (err)
1767 			goto done;
1768 		nentries++;
1769 	}
1770 
1771 	if (TAILQ_EMPTY(&paths)) {
1772 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1773 		    "cannot create tree without any entries");
1774 		goto done;
1775 	}
1776 
1777 	TAILQ_FOREACH(pe, &paths, entry) {
1778 		struct got_tree_entry *te = pe->data;
1779 		char *path;
1780 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1781 			continue;
1782 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1783 			err = got_error_from_errno("asprintf");
1784 			goto done;
1785 		}
1786 		err = (*progress_cb)(progress_arg, path);
1787 		free(path);
1788 		if (err)
1789 			goto done;
1790 	}
1791 
1792 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1793 done:
1794 	if (dir)
1795 		closedir(dir);
1796 	got_pathlist_free(&paths);
1797 	return err;
1798 }
1799 
1800 const struct got_error *
1801 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1802     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1803     struct got_repository *repo, got_repo_import_cb progress_cb,
1804     void *progress_arg)
1805 {
1806 	const struct got_error *err;
1807 	struct got_object_id *new_tree_id;
1808 
1809 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1810 	    progress_cb, progress_arg);
1811 	if (err)
1812 		return err;
1813 
1814 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1815 	    author, time(NULL), author, time(NULL), logmsg, repo);
1816 	free(new_tree_id);
1817 	return err;
1818 }
1819 
1820 const struct got_error *
1821 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
1822     struct got_repository *repo)
1823 {
1824 	const struct got_error *err = NULL;
1825 	char *path_objects = NULL, *path = NULL;
1826 	DIR *dir = NULL;
1827 	struct got_object_id id;
1828 	int i;
1829 
1830 	*nobjects = 0;
1831 	*ondisk_size = 0;
1832 
1833 	path_objects = got_repo_get_path_objects(repo);
1834 	if (path_objects == NULL)
1835 		return got_error_from_errno("got_repo_get_path_objects");
1836 
1837 	for (i = 0; i <= 0xff; i++) {
1838 		struct dirent *dent;
1839 
1840 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
1841 			err = got_error_from_errno("asprintf");
1842 			break;
1843 		}
1844 
1845 		dir = opendir(path);
1846 		if (dir == NULL) {
1847 			if (errno == ENOENT) {
1848 				err = NULL;
1849 				continue;
1850 			}
1851 			err = got_error_from_errno2("opendir", path);
1852 			break;
1853 		}
1854 
1855 		while ((dent = readdir(dir)) != NULL) {
1856 			char *id_str;
1857 			int fd;
1858 			struct stat sb;
1859 
1860 			if (strcmp(dent->d_name, ".") == 0 ||
1861 			    strcmp(dent->d_name, "..") == 0)
1862 				continue;
1863 
1864 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
1865 				err = got_error_from_errno("asprintf");
1866 				goto done;
1867 			}
1868 
1869 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
1870 				free(id_str);
1871 				continue;
1872 			}
1873 			free(id_str);
1874 
1875 			err = got_object_open_loose_fd(&fd, &id, repo);
1876 			if (err)
1877 				goto done;
1878 
1879 			if (fstat(fd, &sb) == -1) {
1880 				err = got_error_from_errno("fstat");
1881 				close(fd);
1882 				goto done;
1883 			}
1884 			(*nobjects)++;
1885 			(*ondisk_size) += sb.st_size;
1886 
1887 			if (close(fd) == -1) {
1888 				err = got_error_from_errno("close");
1889 				goto done;
1890 			}
1891 		}
1892 
1893 		if (closedir(dir) != 0) {
1894 			err = got_error_from_errno("closedir");
1895 			goto done;
1896 		}
1897 		dir = NULL;
1898 
1899 		free(path);
1900 		path = NULL;
1901 	}
1902 done:
1903 	if (dir && closedir(dir) != 0 && err == NULL)
1904 		err = got_error_from_errno("closedir");
1905 
1906 	if (err) {
1907 		*nobjects = 0;
1908 		*ondisk_size = 0;
1909 	}
1910 	free(path_objects);
1911 	free(path);
1912 	return err;
1913 }
1914 
1915 const struct got_error *
1916 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
1917     off_t *total_packsize, struct got_repository *repo)
1918 {
1919 	const struct got_error *err = NULL;
1920 	DIR *packdir = NULL;
1921 	struct dirent *dent;
1922 	struct got_packidx *packidx = NULL;
1923 	char *path_packidx;
1924 	char *path_packfile;
1925 	int packdir_fd;
1926 	struct stat sb;
1927 
1928 	*npackfiles = 0;
1929 	*nobjects = 0;
1930 	*total_packsize = 0;
1931 
1932 	packdir_fd = openat(got_repo_get_fd(repo),
1933 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1934 	if (packdir_fd == -1) {
1935 		return got_error_from_errno_fmt("openat: %s/%s",
1936 		    got_repo_get_path_git_dir(repo),
1937 		    GOT_OBJECTS_PACK_DIR);
1938 	}
1939 
1940 	packdir = fdopendir(packdir_fd);
1941 	if (packdir == NULL) {
1942 		err = got_error_from_errno("fdopendir");
1943 		goto done;
1944 	}
1945 
1946 	while ((dent = readdir(packdir)) != NULL) {
1947 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1948 			continue;
1949 
1950 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1951 		    dent->d_name) == -1) {
1952 			err = got_error_from_errno("asprintf");
1953 			goto done;
1954 		}
1955 
1956 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1957 		    path_packidx, 0);
1958 		free(path_packidx);
1959 		if (err)
1960 			goto done;
1961 
1962 		if (fstat(packidx->fd, &sb) == -1)
1963 			goto done;
1964 		*total_packsize += sb.st_size;
1965 
1966 		err = got_packidx_get_packfile_path(&path_packfile, packidx);
1967 		if (err)
1968 			goto done;
1969 
1970 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
1971 		    0) == -1) {
1972 			free(path_packfile);
1973 			goto done;
1974 		}
1975 		free(path_packfile);
1976 		*total_packsize += sb.st_size;
1977 
1978 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
1979 
1980 		(*npackfiles)++;
1981 
1982 		got_packidx_close(packidx);
1983 		packidx = NULL;
1984 	}
1985 done:
1986 	if (packidx)
1987 		got_packidx_close(packidx);
1988 	if (packdir && closedir(packdir) != 0 && err == NULL)
1989 		err = got_error_from_errno("closedir");
1990 	if (err) {
1991 		*npackfiles = 0;
1992 		*nobjects = 0;
1993 		*total_packsize = 0;
1994 	}
1995 	return err;
1996 }