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 <fcntl.h>
27 #include <fnmatch.h>
28 #include <limits.h>
29 #include <dirent.h>
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <string.h>
33 #include <time.h>
34 #include <unistd.h>
35 #include <zlib.h>
36 #include <errno.h>
37 #include <libgen.h>
38 #include <stdint.h>
39 
40 #include "bloom.h"
41 
42 #include "got_error.h"
43 #include "got_reference.h"
44 #include "got_repository.h"
45 #include "got_path.h"
46 #include "got_cancel.h"
47 #include "got_object.h"
48 #include "got_opentemp.h"
49 
50 #include "got_lib_delta.h"
51 #include "got_lib_inflate.h"
52 #include "got_lib_object.h"
53 #include "got_lib_object_parse.h"
54 #include "got_lib_object_create.h"
55 #include "got_lib_pack.h"
56 #include "got_lib_privsep.h"
57 #include "got_lib_sha1.h"
58 #include "got_lib_object_cache.h"
59 #include "got_lib_repository.h"
60 #include "got_lib_gotconfig.h"
61 
62 #ifndef nitems
63 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
64 #endif
65 
66 #define GOT_PACK_NUM_TEMPFILES		GOT_PACK_CACHE_SIZE * 2
67 
68 RB_PROTOTYPE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
69     got_packidx_bloom_filter_cmp);
70 
71 const char *
72 got_repo_get_path(struct got_repository *repo)
73 {
74 	return repo->path;
75 }
76 
77 const char *
78 got_repo_get_path_git_dir(struct got_repository *repo)
79 {
80 	return repo->path_git_dir;
81 }
82 
83 int
84 got_repo_get_fd(struct got_repository *repo)
85 {
86 	return repo->gitdir_fd;
87 }
88 
89 const char *
90 got_repo_get_gitconfig_author_name(struct got_repository *repo)
91 {
92 	return repo->gitconfig_author_name;
93 }
94 
95 const char *
96 got_repo_get_gitconfig_author_email(struct got_repository *repo)
97 {
98 	return repo->gitconfig_author_email;
99 }
100 
101 const char *
102 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
103 {
104 	return repo->global_gitconfig_author_name;
105 }
106 
107 const char *
108 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
109 {
110 	return repo->global_gitconfig_author_email;
111 }
112 
113 const char *
114 got_repo_get_gitconfig_owner(struct got_repository *repo)
115 {
116 	return repo->gitconfig_owner;
117 }
118 
119 void
120 got_repo_get_gitconfig_extensions(char ***extensions, int *nextensions,
121     struct got_repository *repo)
122 {
123 	*extensions = repo->extensions;
124 	*nextensions = repo->nextensions;
125 }
126 
127 int
128 got_repo_is_bare(struct got_repository *repo)
129 {
130 	return (strcmp(repo->path, repo->path_git_dir) == 0);
131 }
132 
133 static char *
134 get_path_git_child(struct got_repository *repo, const char *basename)
135 {
136 	char *path_child;
137 
138 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
139 	    basename) == -1)
140 		return NULL;
141 
142 	return path_child;
143 }
144 
145 char *
146 got_repo_get_path_objects(struct got_repository *repo)
147 {
148 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
149 }
150 
151 char *
152 got_repo_get_path_objects_pack(struct got_repository *repo)
153 {
154 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
155 }
156 
157 char *
158 got_repo_get_path_refs(struct got_repository *repo)
159 {
160 	return get_path_git_child(repo, GOT_REFS_DIR);
161 }
162 
163 char *
164 got_repo_get_path_packed_refs(struct got_repository *repo)
165 {
166 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
167 }
168 
169 static char *
170 get_path_head(struct got_repository *repo)
171 {
172 	return get_path_git_child(repo, GOT_HEAD_FILE);
173 }
174 
175 char *
176 got_repo_get_path_gitconfig(struct got_repository *repo)
177 {
178 	return get_path_git_child(repo, GOT_GITCONFIG);
179 }
180 
181 char *
182 got_repo_get_path_gotconfig(struct got_repository *repo)
183 {
184 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
185 }
186 
187 const struct got_gotconfig *
188 got_repo_get_gotconfig(struct got_repository *repo)
189 {
190 	return repo->gotconfig;
191 }
192 
193 void
194 got_repo_get_gitconfig_remotes(int *nremotes,
195     const struct got_remote_repo **remotes, struct got_repository *repo)
196 {
197 	*nremotes = repo->ngitconfig_remotes;
198 	*remotes = repo->gitconfig_remotes;
199 }
200 
201 static int
202 is_git_repo(struct got_repository *repo)
203 {
204 	const char *path_git = got_repo_get_path_git_dir(repo);
205 	char *path_objects = got_repo_get_path_objects(repo);
206 	char *path_refs = got_repo_get_path_refs(repo);
207 	char *path_head = get_path_head(repo);
208 	int ret = 0;
209 	struct stat sb;
210 	struct got_reference *head_ref;
211 
212 	if (lstat(path_git, &sb) == -1)
213 		goto done;
214 	if (!S_ISDIR(sb.st_mode))
215 		goto done;
216 
217 	if (lstat(path_objects, &sb) == -1)
218 		goto done;
219 	if (!S_ISDIR(sb.st_mode))
220 		goto done;
221 
222 	if (lstat(path_refs, &sb) == -1)
223 		goto done;
224 	if (!S_ISDIR(sb.st_mode))
225 		goto done;
226 
227 	if (lstat(path_head, &sb) == -1)
228 		goto done;
229 	if (!S_ISREG(sb.st_mode))
230 		goto done;
231 
232 	/* Check if the HEAD reference can be opened. */
233 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
234 		goto done;
235 	got_ref_close(head_ref);
236 
237 	ret = 1;
238 done:
239 	free(path_objects);
240 	free(path_refs);
241 	free(path_head);
242 	return ret;
243 
244 }
245 
246 const struct got_error *
247 got_repo_pack_fds_open(int **pack_fds)
248 {
249 	const struct got_error *err = NULL;
250 	int i, *pack_fds_tmp;
251 
252 	pack_fds_tmp = calloc(GOT_PACK_NUM_TEMPFILES, sizeof(int));
253 	if (pack_fds_tmp == NULL)
254 		return got_error_from_errno("calloc");
255 	*pack_fds = calloc(GOT_PACK_NUM_TEMPFILES, sizeof(**pack_fds));
256 	if (*pack_fds == NULL) {
257 		free(pack_fds_tmp);
258 		return got_error_from_errno("calloc");
259 	}
260 
261 	/*
262 	 * got_repo_pack_fds_close will try to close all of the
263 	 * GOT_PACK_NUM_TEMPFILES fds, even the ones that didn't manage to get
264 	 * a value from got_opentempfd(), which would result in a close(0) if
265 	 * we do not initialize to -1 here.
266 	 */
267 	for (i = 0; i < GOT_PACK_NUM_TEMPFILES; i++)
268 		pack_fds_tmp[i] = -1;
269 
270 	for (i = 0; i < GOT_PACK_NUM_TEMPFILES; i++) {
271 		pack_fds_tmp[i] = got_opentempfd();
272 		if (pack_fds_tmp[i] == -1) {
273 			err = got_error_from_errno("got_opentempfd");
274 			got_repo_pack_fds_close(pack_fds_tmp);
275 			return err;
276 		}
277 	}
278 	memcpy(*pack_fds, pack_fds_tmp, GOT_PACK_NUM_TEMPFILES * sizeof(int));
279 	return err;
280 }
281 
282 const struct got_error *
283 got_repo_pack_fds_close(int *pack_fds)
284 {
285 	const struct got_error *err = NULL;
286 	int i;
287 
288 	for (i = 0; i < GOT_PACK_NUM_TEMPFILES; i++) {
289 		if (pack_fds[i] == -1)
290 			continue;
291 		if (close(pack_fds[i]) == -1) {
292 			err = got_error_from_errno("close");
293 			break;
294 		}
295 	}
296 	free(pack_fds);
297 	return err;
298 }
299 
300 const struct got_error *
301 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
302     struct got_object *obj)
303 {
304 #ifndef GOT_NO_OBJ_CACHE
305 	const struct got_error *err = NULL;
306 	err = got_object_cache_add(&repo->objcache, id, obj);
307 	if (err) {
308 		if (err->code == GOT_ERR_OBJ_EXISTS ||
309 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
310 			err = NULL;
311 		return err;
312 	}
313 	obj->refcnt++;
314 #endif
315 	return NULL;
316 }
317 
318 struct got_object *
319 got_repo_get_cached_object(struct got_repository *repo,
320     struct got_object_id *id)
321 {
322 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
323 }
324 
325 const struct got_error *
326 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
327     struct got_tree_object *tree)
328 {
329 #ifndef GOT_NO_OBJ_CACHE
330 	const struct got_error *err = NULL;
331 	err = got_object_cache_add(&repo->treecache, id, tree);
332 	if (err) {
333 		if (err->code == GOT_ERR_OBJ_EXISTS ||
334 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
335 			err = NULL;
336 		return err;
337 	}
338 	tree->refcnt++;
339 #endif
340 	return NULL;
341 }
342 
343 struct got_tree_object *
344 got_repo_get_cached_tree(struct got_repository *repo,
345     struct got_object_id *id)
346 {
347 	return (struct got_tree_object *)got_object_cache_get(
348 	    &repo->treecache, id);
349 }
350 
351 const struct got_error *
352 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
353     struct got_commit_object *commit)
354 {
355 #ifndef GOT_NO_OBJ_CACHE
356 	const struct got_error *err = NULL;
357 	err = got_object_cache_add(&repo->commitcache, id, commit);
358 	if (err) {
359 		if (err->code == GOT_ERR_OBJ_EXISTS ||
360 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
361 			err = NULL;
362 		return err;
363 	}
364 	commit->refcnt++;
365 #endif
366 	return NULL;
367 }
368 
369 struct got_commit_object *
370 got_repo_get_cached_commit(struct got_repository *repo,
371     struct got_object_id *id)
372 {
373 	return (struct got_commit_object *)got_object_cache_get(
374 	    &repo->commitcache, id);
375 }
376 
377 const struct got_error *
378 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
379     struct got_tag_object *tag)
380 {
381 #ifndef GOT_NO_OBJ_CACHE
382 	const struct got_error *err = NULL;
383 	err = got_object_cache_add(&repo->tagcache, id, tag);
384 	if (err) {
385 		if (err->code == GOT_ERR_OBJ_EXISTS ||
386 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
387 			err = NULL;
388 		return err;
389 	}
390 	tag->refcnt++;
391 #endif
392 	return NULL;
393 }
394 
395 struct got_tag_object *
396 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
397 {
398 	return (struct got_tag_object *)got_object_cache_get(
399 	    &repo->tagcache, id);
400 }
401 
402 const struct got_error *
403 got_repo_cache_raw_object(struct got_repository *repo, struct got_object_id *id,
404     struct got_raw_object *raw)
405 {
406 #ifndef GOT_NO_OBJ_CACHE
407 	const struct got_error *err = NULL;
408 	err = got_object_cache_add(&repo->rawcache, id, raw);
409 	if (err) {
410 		if (err->code == GOT_ERR_OBJ_EXISTS ||
411 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
412 			err = NULL;
413 		return err;
414 	}
415 	raw->refcnt++;
416 #endif
417 	return NULL;
418 }
419 
420 
421 struct got_raw_object *
422 got_repo_get_cached_raw_object(struct got_repository *repo,
423     struct got_object_id *id)
424 {
425 	return (struct got_raw_object *)got_object_cache_get(&repo->rawcache, id);
426 }
427 
428 
429 static const struct got_error *
430 open_repo(struct got_repository *repo, const char *path)
431 {
432 	const struct got_error *err = NULL;
433 
434 	repo->gitdir_fd = -1;
435 
436 	/* bare git repository? */
437 	repo->path_git_dir = strdup(path);
438 	if (repo->path_git_dir == NULL)
439 		return got_error_from_errno("strdup");
440 	if (is_git_repo(repo)) {
441 		repo->path = strdup(repo->path_git_dir);
442 		if (repo->path == NULL) {
443 			err = got_error_from_errno("strdup");
444 			goto done;
445 		}
446 		repo->gitdir_fd = open(repo->path_git_dir,
447 		    O_DIRECTORY | O_CLOEXEC);
448 		if (repo->gitdir_fd == -1) {
449 			err = got_error_from_errno2("open",
450 			    repo->path_git_dir);
451 			goto done;
452 		}
453 		return NULL;
454 	}
455 
456 	/* git repository with working tree? */
457 	free(repo->path_git_dir);
458 	repo->path_git_dir = NULL;
459 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
460 		err = got_error_from_errno("asprintf");
461 		goto done;
462 	}
463 	if (is_git_repo(repo)) {
464 		repo->path = strdup(path);
465 		if (repo->path == NULL) {
466 			err = got_error_from_errno("strdup");
467 			goto done;
468 		}
469 		repo->gitdir_fd = open(repo->path_git_dir,
470 		    O_DIRECTORY | O_CLOEXEC);
471 		if (repo->gitdir_fd == -1) {
472 			err = got_error_from_errno2("open",
473 			    repo->path_git_dir);
474 			goto done;
475 		}
476 		return NULL;
477 	}
478 
479 	err = got_error(GOT_ERR_NOT_GIT_REPO);
480 done:
481 	if (err) {
482 		free(repo->path);
483 		repo->path = NULL;
484 		free(repo->path_git_dir);
485 		repo->path_git_dir = NULL;
486 		if (repo->gitdir_fd != -1)
487 			close(repo->gitdir_fd);
488 		repo->gitdir_fd = -1;
489 
490 	}
491 	return err;
492 }
493 
494 static const struct got_error *
495 parse_gitconfig_file(int *gitconfig_repository_format_version,
496     char **gitconfig_author_name, char **gitconfig_author_email,
497     struct got_remote_repo **remotes, int *nremotes,
498     char **gitconfig_owner, char ***extensions, int *nextensions,
499     const char *gitconfig_path)
500 {
501 	const struct got_error *err = NULL, *child_err = NULL;
502 	int fd = -1;
503 	int imsg_fds[2] = { -1, -1 };
504 	pid_t pid;
505 	struct imsgbuf *ibuf;
506 
507 	*gitconfig_repository_format_version = 0;
508 	if (extensions)
509 		*extensions = NULL;
510 	if (nextensions)
511 		*nextensions = 0;
512 	*gitconfig_author_name = NULL;
513 	*gitconfig_author_email = NULL;
514 	if (remotes)
515 		*remotes = NULL;
516 	if (nremotes)
517 		*nremotes = 0;
518 	if (gitconfig_owner)
519 		*gitconfig_owner = NULL;
520 
521 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
522 	if (fd == -1) {
523 		if (errno == ENOENT)
524 			return NULL;
525 		return got_error_from_errno2("open", gitconfig_path);
526 	}
527 
528 	ibuf = calloc(1, sizeof(*ibuf));
529 	if (ibuf == NULL) {
530 		err = got_error_from_errno("calloc");
531 		goto done;
532 	}
533 
534 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
535 		err = got_error_from_errno("socketpair");
536 		goto done;
537 	}
538 
539 	pid = fork();
540 	if (pid == -1) {
541 		err = got_error_from_errno("fork");
542 		goto done;
543 	} else if (pid == 0) {
544 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
545 		    gitconfig_path);
546 		/* not reached */
547 	}
548 
549 	if (close(imsg_fds[1]) == -1) {
550 		err = got_error_from_errno("close");
551 		goto done;
552 	}
553 	imsg_fds[1] = -1;
554 	imsg_init(ibuf, imsg_fds[0]);
555 
556 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
557 	if (err)
558 		goto done;
559 	fd = -1;
560 
561 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
562 	if (err)
563 		goto done;
564 
565 	err = got_privsep_recv_gitconfig_int(
566 	    gitconfig_repository_format_version, ibuf);
567 	if (err)
568 		goto done;
569 
570 	if (extensions && nextensions) {
571 		err = got_privsep_send_gitconfig_repository_extensions_req(
572 		    ibuf);
573 		if (err)
574 			goto done;
575 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
576 		if (err)
577 			goto done;
578 		if (*nextensions > 0) {
579 			int i;
580 			*extensions = calloc(*nextensions, sizeof(char *));
581 			if (*extensions == NULL) {
582 				err = got_error_from_errno("calloc");
583 				goto done;
584 			}
585 			for (i = 0; i < *nextensions; i++) {
586 				char *ext;
587 				err = got_privsep_recv_gitconfig_str(&ext,
588 				    ibuf);
589 				if (err)
590 					goto done;
591 				(*extensions)[i] = ext;
592 			}
593 		}
594 	}
595 
596 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
597 	if (err)
598 		goto done;
599 
600 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
601 	if (err)
602 		goto done;
603 
604 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
605 	if (err)
606 		goto done;
607 
608 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
609 	if (err)
610 		goto done;
611 
612 	if (remotes && nremotes) {
613 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
614 		if (err)
615 			goto done;
616 
617 		err = got_privsep_recv_gitconfig_remotes(remotes,
618 		    nremotes, ibuf);
619 		if (err)
620 			goto done;
621 	}
622 
623 	if (gitconfig_owner) {
624 		err = got_privsep_send_gitconfig_owner_req(ibuf);
625 		if (err)
626 			goto done;
627 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
628 		if (err)
629 			goto done;
630 	}
631 
632 	err = got_privsep_send_stop(imsg_fds[0]);
633 	child_err = got_privsep_wait_for_child(pid);
634 	if (child_err && err == NULL)
635 		err = child_err;
636 done:
637 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
638 		err = got_error_from_errno("close");
639 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
640 		err = got_error_from_errno("close");
641 	if (fd != -1 && close(fd) == -1 && err == NULL)
642 		err = got_error_from_errno2("close", gitconfig_path);
643 	free(ibuf);
644 	return err;
645 }
646 
647 static const struct got_error *
648 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
649 {
650 	const struct got_error *err = NULL;
651 	char *repo_gitconfig_path = NULL;
652 
653 	if (global_gitconfig_path) {
654 		/* Read settings from ~/.gitconfig. */
655 		int dummy_repo_version;
656 		err = parse_gitconfig_file(&dummy_repo_version,
657 		    &repo->global_gitconfig_author_name,
658 		    &repo->global_gitconfig_author_email,
659 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
660 		if (err)
661 			return err;
662 	}
663 
664 	/* Read repository's .git/config file. */
665 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
666 	if (repo_gitconfig_path == NULL)
667 		return got_error_from_errno("got_repo_get_path_gitconfig");
668 
669 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
670 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
671 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
672 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
673 	    repo_gitconfig_path);
674 	if (err)
675 		goto done;
676 
677 	if (getenv("GOT_IGNORE_GITCONFIG") != NULL) {
678 		int i;
679 
680 		for (i = 0; i < repo->ngitconfig_remotes; i++) {
681 			got_repo_free_remote_repo_data(
682 			    &repo->gitconfig_remotes[i]);
683 		}
684 		free(repo->gitconfig_remotes);
685 		repo->gitconfig_remotes = NULL;
686 		repo->ngitconfig_remotes = 0;
687 
688 		free(repo->gitconfig_author_name);
689 		repo->gitconfig_author_name = NULL;
690 		free(repo->gitconfig_author_email);
691 		repo->gitconfig_author_email = NULL;
692 
693 		free(repo->global_gitconfig_author_name);
694 		repo->global_gitconfig_author_name = NULL;
695 		free(repo->global_gitconfig_author_email);
696 		repo->global_gitconfig_author_email = NULL;
697 	}
698 
699 done:
700 	free(repo_gitconfig_path);
701 	return err;
702 }
703 
704 static const struct got_error *
705 read_gotconfig(struct got_repository *repo)
706 {
707 	const struct got_error *err = NULL;
708 	char *gotconfig_path;
709 
710 	gotconfig_path = got_repo_get_path_gotconfig(repo);
711 	if (gotconfig_path == NULL)
712 		return got_error_from_errno("got_repo_get_path_gotconfig");
713 
714 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
715 	free(gotconfig_path);
716 	return err;
717 }
718 
719 /* Supported repository format extensions. */
720 static const char *const repo_extensions[] = {
721 	"noop",			/* Got supports repository format version 1. */
722 	"preciousObjects",	/* Supported by gotadmin cleanup. */
723 	"worktreeConfig",	/* Got does not care about Git work trees. */
724 };
725 
726 const struct got_error *
727 got_repo_open(struct got_repository **repop, const char *path,
728     const char *global_gitconfig_path, int *pack_fds)
729 {
730 	struct got_repository *repo = NULL;
731 	const struct got_error *err = NULL;
732 	char *repo_path = NULL;
733 	size_t i, j = 0;
734 	struct rlimit rl;
735 
736 	*repop = NULL;
737 
738 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
739 		return got_error_from_errno("getrlimit");
740 
741 	repo = calloc(1, sizeof(*repo));
742 	if (repo == NULL)
743 		return got_error_from_errno("calloc");
744 
745 	RB_INIT(&repo->packidx_bloom_filters);
746 	TAILQ_INIT(&repo->packidx_paths);
747 
748 	for (i = 0; i < nitems(repo->privsep_children); i++) {
749 		memset(&repo->privsep_children[i], 0,
750 		    sizeof(repo->privsep_children[0]));
751 		repo->privsep_children[i].imsg_fd = -1;
752 	}
753 
754 	err = got_object_cache_init(&repo->objcache,
755 	    GOT_OBJECT_CACHE_TYPE_OBJ);
756 	if (err)
757 		goto done;
758 	err = got_object_cache_init(&repo->treecache,
759 	    GOT_OBJECT_CACHE_TYPE_TREE);
760 	if (err)
761 		goto done;
762 	err = got_object_cache_init(&repo->commitcache,
763 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
764 	if (err)
765 		goto done;
766 	err = got_object_cache_init(&repo->tagcache,
767 	    GOT_OBJECT_CACHE_TYPE_TAG);
768 	if (err)
769 		goto done;
770 	err = got_object_cache_init(&repo->rawcache,
771 	    GOT_OBJECT_CACHE_TYPE_RAW);
772 	if (err)
773 		goto done;
774 
775 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
776 	if (repo->pack_cache_size > rl.rlim_cur / 8)
777 		repo->pack_cache_size = rl.rlim_cur / 8;
778 	for (i = 0; i < nitems(repo->packs); i++) {
779 		if (i < repo->pack_cache_size) {
780 			repo->packs[i].basefd = pack_fds[j++];
781 			repo->packs[i].accumfd = pack_fds[j++];
782 		} else {
783 			repo->packs[i].basefd = -1;
784 			repo->packs[i].accumfd = -1;
785 		}
786 	}
787 	repo->pinned_pack = -1;
788 	repo->pinned_packidx = -1;
789 	repo->pinned_pid = 0;
790 
791 	repo_path = realpath(path, NULL);
792 	if (repo_path == NULL) {
793 		err = got_error_from_errno2("realpath", path);
794 		goto done;
795 	}
796 
797 	for (;;) {
798 		char *parent_path;
799 
800 		err = open_repo(repo, repo_path);
801 		if (err == NULL)
802 			break;
803 		if (err->code != GOT_ERR_NOT_GIT_REPO)
804 			goto done;
805 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
806 			err = got_error(GOT_ERR_NOT_GIT_REPO);
807 			goto done;
808 		}
809 		err = got_path_dirname(&parent_path, repo_path);
810 		if (err)
811 			goto done;
812 		free(repo_path);
813 		repo_path = parent_path;
814 	}
815 
816 	err = read_gotconfig(repo);
817 	if (err)
818 		goto done;
819 
820 	err = read_gitconfig(repo, global_gitconfig_path);
821 	if (err)
822 		goto done;
823 	if (repo->gitconfig_repository_format_version != 0) {
824 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
825 		goto done;
826 	}
827 	for (i = 0; i < repo->nextensions; i++) {
828 		char *ext = repo->extensions[i];
829 		int j, supported = 0;
830 		for (j = 0; j < nitems(repo_extensions); j++) {
831 			if (strcmp(ext, repo_extensions[j]) == 0) {
832 				supported = 1;
833 				break;
834 			}
835 		}
836 		if (!supported) {
837 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
838 			goto done;
839 		}
840 	}
841 
842 	err = got_repo_list_packidx(&repo->packidx_paths, repo);
843 done:
844 	if (err)
845 		got_repo_close(repo);
846 	else
847 		*repop = repo;
848 	free(repo_path);
849 	return err;
850 }
851 
852 const struct got_error *
853 got_repo_close(struct got_repository *repo)
854 {
855 	const struct got_error *err = NULL, *child_err;
856 	struct got_packidx_bloom_filter *bf;
857 	struct got_pathlist_entry *pe;
858 	size_t i;
859 
860 	for (i = 0; i < repo->pack_cache_size; i++) {
861 		if (repo->packidx_cache[i] == NULL)
862 			break;
863 		got_packidx_close(repo->packidx_cache[i]);
864 	}
865 
866 	while ((bf = RB_MIN(got_packidx_bloom_filter_tree,
867 	    &repo->packidx_bloom_filters))) {
868 		RB_REMOVE(got_packidx_bloom_filter_tree,
869 		    &repo->packidx_bloom_filters, bf);
870 		bloom_free(bf->bloom);
871 		free(bf->bloom);
872 		free(bf);
873 	}
874 
875 	for (i = 0; i < repo->pack_cache_size; i++)
876 		if (repo->packs[i].path_packfile)
877 			if (repo->packs[i].path_packfile)
878 				got_pack_close(&repo->packs[i]);
879 
880 	free(repo->path);
881 	free(repo->path_git_dir);
882 
883 	got_object_cache_close(&repo->objcache);
884 	got_object_cache_close(&repo->treecache);
885 	got_object_cache_close(&repo->commitcache);
886 	got_object_cache_close(&repo->tagcache);
887 	got_object_cache_close(&repo->rawcache);
888 
889 	for (i = 0; i < nitems(repo->privsep_children); i++) {
890 		if (repo->privsep_children[i].imsg_fd == -1)
891 			continue;
892 		imsg_clear(repo->privsep_children[i].ibuf);
893 		free(repo->privsep_children[i].ibuf);
894 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
895 		child_err = got_privsep_wait_for_child(
896 		    repo->privsep_children[i].pid);
897 		if (child_err && err == NULL)
898 			err = child_err;
899 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
900 		    err == NULL)
901 			err = got_error_from_errno("close");
902 	}
903 
904 	if (repo->gitdir_fd != -1 && close(repo->gitdir_fd) == -1 &&
905 	    err == NULL)
906 		err = got_error_from_errno("close");
907 
908 	if (repo->gotconfig)
909 		got_gotconfig_free(repo->gotconfig);
910 	free(repo->gitconfig_author_name);
911 	free(repo->gitconfig_author_email);
912 	for (i = 0; i < repo->ngitconfig_remotes; i++)
913 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
914 	free(repo->gitconfig_remotes);
915 	for (i = 0; i < repo->nextensions; i++)
916 		free(repo->extensions[i]);
917 	free(repo->extensions);
918 
919 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry)
920 		free((void *)pe->path);
921 	got_pathlist_free(&repo->packidx_paths);
922 	free(repo);
923 
924 	return err;
925 }
926 
927 void
928 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
929 {
930 	int i;
931 
932 	free(repo->name);
933 	repo->name = NULL;
934 	free(repo->fetch_url);
935 	repo->fetch_url = NULL;
936 	free(repo->send_url);
937 	repo->send_url = NULL;
938 	for (i = 0; i < repo->nfetch_branches; i++)
939 		free(repo->fetch_branches[i]);
940 	free(repo->fetch_branches);
941 	repo->fetch_branches = NULL;
942 	repo->nfetch_branches = 0;
943 	for (i = 0; i < repo->nsend_branches; i++)
944 		free(repo->send_branches[i]);
945 	free(repo->send_branches);
946 	repo->send_branches = NULL;
947 	repo->nsend_branches = 0;
948 }
949 
950 const struct got_error *
951 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
952     const char *input_path)
953 {
954 	const struct got_error *err = NULL;
955 	const char *repo_abspath = NULL;
956 	size_t repolen, len;
957 	char *canonpath, *path = NULL;
958 
959 	*in_repo_path = NULL;
960 
961 	canonpath = strdup(input_path);
962 	if (canonpath == NULL) {
963 		err = got_error_from_errno("strdup");
964 		goto done;
965 	}
966 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
967 	if (err)
968 		goto done;
969 
970 	repo_abspath = got_repo_get_path(repo);
971 
972 	if (canonpath[0] == '\0') {
973 		path = strdup(canonpath);
974 		if (path == NULL) {
975 			err = got_error_from_errno("strdup");
976 			goto done;
977 		}
978 	} else {
979 		path = realpath(canonpath, NULL);
980 		if (path == NULL) {
981 			if (errno != ENOENT) {
982 				err = got_error_from_errno2("realpath",
983 				    canonpath);
984 				goto done;
985 			}
986 			/*
987 			 * Path is not on disk.
988 			 * Assume it is already relative to repository root.
989 			 */
990 			path = strdup(canonpath);
991 			if (path == NULL) {
992 				err = got_error_from_errno("strdup");
993 				goto done;
994 			}
995 		}
996 
997 		repolen = strlen(repo_abspath);
998 		len = strlen(path);
999 
1000 
1001 		if (strcmp(path, repo_abspath) == 0) {
1002 			free(path);
1003 			path = strdup("");
1004 			if (path == NULL) {
1005 				err = got_error_from_errno("strdup");
1006 				goto done;
1007 			}
1008 		} else if (len > repolen &&
1009 		    got_path_is_child(path, repo_abspath, repolen)) {
1010 			/* Matched an on-disk path inside repository. */
1011 			if (got_repo_is_bare(repo)) {
1012 				/*
1013 				 * Matched an on-disk path inside repository
1014 				 * database. Treat input as repository-relative.
1015 				 */
1016 				free(path);
1017 				path = canonpath;
1018 				canonpath = NULL;
1019 			} else {
1020 				char *child;
1021 				/* Strip common prefix with repository path. */
1022 				err = got_path_skip_common_ancestor(&child,
1023 				    repo_abspath, path);
1024 				if (err)
1025 					goto done;
1026 				free(path);
1027 				path = child;
1028 			}
1029 		} else {
1030 			/*
1031 			 * Matched unrelated on-disk path.
1032 			 * Treat input as repository-relative.
1033 			 */
1034 			free(path);
1035 			path = canonpath;
1036 			canonpath = NULL;
1037 		}
1038 	}
1039 
1040 	/* Make in-repository path absolute */
1041 	if (path[0] != '/') {
1042 		char *abspath;
1043 		if (asprintf(&abspath, "/%s", path) == -1) {
1044 			err = got_error_from_errno("asprintf");
1045 			goto done;
1046 		}
1047 		free(path);
1048 		path = abspath;
1049 	}
1050 
1051 done:
1052 	free(canonpath);
1053 	if (err)
1054 		free(path);
1055 	else
1056 		*in_repo_path = path;
1057 	return err;
1058 }
1059 
1060 static const struct got_error *
1061 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
1062     const char *path_packidx)
1063 {
1064 	const struct got_error *err = NULL;
1065 	size_t i;
1066 
1067 	for (i = 0; i < repo->pack_cache_size; i++) {
1068 		if (repo->packidx_cache[i] == NULL)
1069 			break;
1070 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1071 		    path_packidx) == 0) {
1072 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1073 		}
1074 	}
1075 	if (i == repo->pack_cache_size) {
1076 		do {
1077 			i--;
1078 		} while (i > 0 && repo->pinned_packidx >= 0 &&
1079 		    i == repo->pinned_packidx);
1080 		err = got_packidx_close(repo->packidx_cache[i]);
1081 		if (err)
1082 			return err;
1083 	}
1084 
1085 	repo->packidx_cache[i] = packidx;
1086 
1087 	return NULL;
1088 }
1089 
1090 int
1091 got_repo_is_packidx_filename(const char *name, size_t len)
1092 {
1093 	if (len != GOT_PACKIDX_NAMELEN)
1094 		return 0;
1095 
1096 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
1097 		return 0;
1098 
1099 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
1100 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
1101 		return 0;
1102 
1103 	return 1;
1104 }
1105 
1106 static struct got_packidx_bloom_filter *
1107 get_packidx_bloom_filter(struct got_repository *repo,
1108     const char *path, size_t path_len)
1109 {
1110 	struct got_packidx_bloom_filter key;
1111 
1112 	if (strlcpy(key.path, path, sizeof(key.path)) >= sizeof(key.path))
1113 		return NULL; /* XXX */
1114 	key.path_len = path_len;
1115 
1116 	return RB_FIND(got_packidx_bloom_filter_tree,
1117 	    &repo->packidx_bloom_filters, &key);
1118 }
1119 
1120 int
1121 got_repo_check_packidx_bloom_filter(struct got_repository *repo,
1122     const char *path_packidx, struct got_object_id *id)
1123 {
1124 	struct got_packidx_bloom_filter *bf;
1125 
1126 	bf = get_packidx_bloom_filter(repo, path_packidx, strlen(path_packidx));
1127 	if (bf)
1128 		return bloom_check(bf->bloom, id->sha1, sizeof(id->sha1));
1129 
1130 	/* No bloom filter means this pack index must be searched. */
1131 	return 1;
1132 }
1133 
1134 static const struct got_error *
1135 add_packidx_bloom_filter(struct got_repository *repo,
1136     struct got_packidx *packidx, const char *path_packidx)
1137 {
1138 	int i, nobjects = be32toh(packidx->hdr.fanout_table[0xff]);
1139 	struct got_packidx_bloom_filter *bf;
1140 	size_t len;
1141 
1142 	/*
1143 	 * Don't use bloom filters for very large pack index files.
1144 	 * Large pack files will contain a relatively large fraction
1145 	 * of our objects so we will likely need to visit them anyway.
1146 	 * The more objects a pack file contains the higher the probability
1147 	 * of a false-positive match from the bloom filter. And reading
1148 	 * all object IDs from a large pack index file can be expensive.
1149 	 */
1150 	if (nobjects > 100000) /* cut-off at about 2MB, at 20 bytes per ID */
1151 		return NULL;
1152 
1153 	/* Do we already have a filter for this pack index? */
1154 	if (get_packidx_bloom_filter(repo, path_packidx,
1155 	    strlen(path_packidx)) != NULL)
1156 		return NULL;
1157 
1158 	bf = calloc(1, sizeof(*bf));
1159 	if (bf == NULL)
1160 		return got_error_from_errno("calloc");
1161 	bf->bloom = calloc(1, sizeof(*bf->bloom));
1162 	if (bf->bloom == NULL) {
1163 		free(bf);
1164 		return got_error_from_errno("calloc");
1165 	}
1166 
1167 	len = strlcpy(bf->path, path_packidx, sizeof(bf->path));
1168 	if (len >= sizeof(bf->path)) {
1169 		free(bf->bloom);
1170 		free(bf);
1171 		return got_error(GOT_ERR_NO_SPACE);
1172 	}
1173 	bf->path_len = len;
1174 
1175 	/* Minimum size supported by our bloom filter is 1000 entries. */
1176 	bloom_init(bf->bloom, nobjects < 1000 ? 1000 : nobjects, 0.1);
1177 	for (i = 0; i < nobjects; i++) {
1178 		struct got_packidx_object_id *id;
1179 		id = &packidx->hdr.sorted_ids[i];
1180 		bloom_add(bf->bloom, id->sha1, sizeof(id->sha1));
1181 	}
1182 
1183 	RB_INSERT(got_packidx_bloom_filter_tree,
1184 	    &repo->packidx_bloom_filters, bf);
1185 	return NULL;
1186 }
1187 
1188 const struct got_error *
1189 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
1190     struct got_repository *repo, struct got_object_id *id)
1191 {
1192 	const struct got_error *err;
1193 	struct got_pathlist_entry *pe;
1194 	size_t i;
1195 
1196 	/* Search pack index cache. */
1197 	for (i = 0; i < repo->pack_cache_size; i++) {
1198 		if (repo->packidx_cache[i] == NULL)
1199 			break;
1200 		if (!got_repo_check_packidx_bloom_filter(repo,
1201 		    repo->packidx_cache[i]->path_packidx, id))
1202 			continue; /* object will not be found in this index */
1203 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
1204 		if (*idx != -1) {
1205 			*packidx = repo->packidx_cache[i];
1206 			/*
1207 			 * Move this cache entry to the front. Repeatedly
1208 			 * searching a wrong pack index can be expensive.
1209 			 */
1210 			if (i > 0) {
1211 				memmove(&repo->packidx_cache[1],
1212 				    &repo->packidx_cache[0],
1213 				    i * sizeof(repo->packidx_cache[0]));
1214 				repo->packidx_cache[0] = *packidx;
1215 				if (repo->pinned_packidx >= 0 &&
1216 				    repo->pinned_packidx < i)
1217 					repo->pinned_packidx++;
1218 				else if (repo->pinned_packidx == i)
1219 					repo->pinned_packidx = 0;
1220 			}
1221 			return NULL;
1222 		}
1223 	}
1224 	/* No luck. Search the filesystem. */
1225 
1226 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry) {
1227 		const char *path_packidx = pe->path;
1228 		int is_cached = 0;
1229 
1230 		if (!got_repo_check_packidx_bloom_filter(repo,
1231 		    pe->path, id))
1232 			continue; /* object will not be found in this index */
1233 
1234 		for (i = 0; i < repo->pack_cache_size; i++) {
1235 			if (repo->packidx_cache[i] == NULL)
1236 				break;
1237 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1238 			    path_packidx) == 0) {
1239 				is_cached = 1;
1240 				break;
1241 			}
1242 		}
1243 		if (is_cached)
1244 			continue; /* already searched */
1245 
1246 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1247 		    path_packidx, 0);
1248 		if (err)
1249 			goto done;
1250 
1251 		err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1252 		if (err)
1253 			goto done;
1254 
1255 		err = cache_packidx(repo, *packidx, path_packidx);
1256 		if (err)
1257 			goto done;
1258 
1259 		*idx = got_packidx_get_object_idx(*packidx, id);
1260 		if (*idx != -1) {
1261 			err = NULL; /* found the object */
1262 			goto done;
1263 		}
1264 	}
1265 
1266 	err = got_error_no_obj(id);
1267 done:
1268 	return err;
1269 }
1270 
1271 const struct got_error *
1272 got_repo_list_packidx(struct got_pathlist_head *packidx_paths,
1273     struct got_repository *repo)
1274 {
1275 	const struct got_error *err = NULL;
1276 	DIR *packdir = NULL;
1277 	struct dirent *dent;
1278 	char *path_packidx = NULL;
1279 	int packdir_fd;
1280 	struct stat sb;
1281 
1282 	packdir_fd = openat(got_repo_get_fd(repo),
1283 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1284 	if (packdir_fd == -1) {
1285 		return got_error_from_errno_fmt("openat: %s/%s",
1286 		    got_repo_get_path_git_dir(repo),
1287 		    GOT_OBJECTS_PACK_DIR);
1288 	}
1289 
1290 	packdir = fdopendir(packdir_fd);
1291 	if (packdir == NULL) {
1292 		err = got_error_from_errno("fdopendir");
1293 		goto done;
1294 	}
1295 
1296 	if (fstat(packdir_fd, &sb) == -1) {
1297 		err = got_error_from_errno("fstat");
1298 		goto done;
1299 	}
1300 	repo->pack_path_mtime = sb.st_mtime;
1301 
1302 	while ((dent = readdir(packdir)) != NULL) {
1303 		if (!got_repo_is_packidx_filename(dent->d_name,
1304 		    strlen(dent->d_name)))
1305 			continue;
1306 
1307 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1308 		    dent->d_name) == -1) {
1309 			err = got_error_from_errno("asprintf");
1310 			path_packidx = NULL;
1311 			break;
1312 		}
1313 
1314 		err = got_pathlist_append(packidx_paths, path_packidx, NULL);
1315 		if (err)
1316 			break;
1317 	}
1318 done:
1319 	if (err)
1320 		free(path_packidx);
1321 	if (packdir && closedir(packdir) != 0 && err == NULL)
1322 		err = got_error_from_errno("closedir");
1323 	return err;
1324 }
1325 
1326 const struct got_error *
1327 got_repo_get_packidx(struct got_packidx **packidx, const char *path_packidx,
1328     struct got_repository *repo)
1329 {
1330 	const struct got_error *err;
1331 	size_t i;
1332 
1333 	*packidx = NULL;
1334 
1335 	/* Search pack index cache. */
1336 	for (i = 0; i < repo->pack_cache_size; i++) {
1337 		if (repo->packidx_cache[i] == NULL)
1338 			break;
1339 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1340 		    path_packidx) == 0) {
1341 			*packidx = repo->packidx_cache[i];
1342 			return NULL;
1343 		}
1344 	}
1345 	/* No luck. Search the filesystem. */
1346 
1347 	err = got_packidx_open(packidx, got_repo_get_fd(repo),
1348 	    path_packidx, 0);
1349 	if (err)
1350 		return err;
1351 
1352 	err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1353 	if (err)
1354 		goto done;
1355 
1356 	err = cache_packidx(repo, *packidx, path_packidx);
1357 done:
1358 	if (err) {
1359 		got_packidx_close(*packidx);
1360 		*packidx = NULL;
1361 	}
1362 	return err;
1363 }
1364 
1365 static const struct got_error *
1366 read_packfile_hdr(int fd, struct got_packidx *packidx)
1367 {
1368 	const struct got_error *err = NULL;
1369 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1370 	struct got_packfile_hdr hdr;
1371 	ssize_t n;
1372 
1373 	n = read(fd, &hdr, sizeof(hdr));
1374 	if (n < 0)
1375 		return got_error_from_errno("read");
1376 	if (n != sizeof(hdr))
1377 		return got_error(GOT_ERR_BAD_PACKFILE);
1378 
1379 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1380 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1381 	    be32toh(hdr.nobjects) != totobj)
1382 		err = got_error(GOT_ERR_BAD_PACKFILE);
1383 
1384 	return err;
1385 }
1386 
1387 static const struct got_error *
1388 open_packfile(int *fd, struct got_repository *repo,
1389     const char *relpath, struct got_packidx *packidx)
1390 {
1391 	const struct got_error *err = NULL;
1392 
1393 	*fd = openat(got_repo_get_fd(repo), relpath,
1394 	    O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
1395 	if (*fd == -1)
1396 		return got_error_from_errno_fmt("openat: %s/%s",
1397 		    got_repo_get_path_git_dir(repo), relpath);
1398 
1399 	if (packidx) {
1400 		err = read_packfile_hdr(*fd, packidx);
1401 		if (err) {
1402 			close(*fd);
1403 			*fd = -1;
1404 		}
1405 	}
1406 
1407 	return err;
1408 }
1409 
1410 const struct got_error *
1411 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1412     const char *path_packfile, struct got_packidx *packidx)
1413 {
1414 	const struct got_error *err = NULL;
1415 	struct got_pack *pack = NULL;
1416 	struct stat sb;
1417 	size_t i;
1418 
1419 	if (packp)
1420 		*packp = NULL;
1421 
1422 	for (i = 0; i < repo->pack_cache_size; i++) {
1423 		pack = &repo->packs[i];
1424 		if (pack->path_packfile == NULL)
1425 			break;
1426 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1427 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1428 	}
1429 
1430 	if (i == repo->pack_cache_size) {
1431 		struct got_pack tmp;
1432 		do {
1433 			i--;
1434 		} while (i > 0 && repo->pinned_pack >= 0 &&
1435 		    i == repo->pinned_pack);
1436 		err = got_pack_close(&repo->packs[i]);
1437 		if (err)
1438 			return err;
1439 		if (ftruncate(repo->packs[i].basefd, 0L) == -1)
1440 			return got_error_from_errno("ftruncate");
1441 		if (ftruncate(repo->packs[i].accumfd, 0L) == -1)
1442 			return got_error_from_errno("ftruncate");
1443 		memcpy(&tmp, &repo->packs[i], sizeof(tmp));
1444 		memcpy(&repo->packs[i], &repo->packs[0],
1445 		    sizeof(repo->packs[i]));
1446 		memcpy(&repo->packs[0], &tmp, sizeof(repo->packs[0]));
1447 		if (repo->pinned_pack == 0)
1448 			repo->pinned_pack = i;
1449 		else if (repo->pinned_pack == i)
1450 			repo->pinned_pack = 0;
1451 		i = 0;
1452 	}
1453 
1454 	pack = &repo->packs[i];
1455 
1456 	pack->path_packfile = strdup(path_packfile);
1457 	if (pack->path_packfile == NULL) {
1458 		err = got_error_from_errno("strdup");
1459 		goto done;
1460 	}
1461 
1462 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1463 	if (err)
1464 		goto done;
1465 
1466 	if (fstat(pack->fd, &sb) != 0) {
1467 		err = got_error_from_errno("fstat");
1468 		goto done;
1469 	}
1470 	pack->filesize = sb.st_size;
1471 
1472 	pack->privsep_child = NULL;
1473 
1474 #ifndef GOT_PACK_NO_MMAP
1475 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1476 	    pack->fd, 0);
1477 	if (pack->map == MAP_FAILED) {
1478 		if (errno != ENOMEM) {
1479 			err = got_error_from_errno("mmap");
1480 			goto done;
1481 		}
1482 		pack->map = NULL; /* fall back to read(2) */
1483 	}
1484 #endif
1485 done:
1486 	if (err) {
1487 		if (pack) {
1488 			free(pack->path_packfile);
1489 			memset(pack, 0, sizeof(*pack));
1490 		}
1491 	} else if (packp)
1492 		*packp = pack;
1493 	return err;
1494 }
1495 
1496 struct got_pack *
1497 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1498 {
1499 	struct got_pack *pack = NULL;
1500 	size_t i;
1501 
1502 	for (i = 0; i < repo->pack_cache_size; i++) {
1503 		pack = &repo->packs[i];
1504 		if (pack->path_packfile == NULL)
1505 			break;
1506 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1507 			return pack;
1508 	}
1509 
1510 	return NULL;
1511 }
1512 
1513 const struct got_error *
1514 got_repo_pin_pack(struct got_repository *repo, struct got_packidx *packidx,
1515     struct got_pack *pack)
1516 {
1517 	size_t i;
1518 	int pinned_pack = -1, pinned_packidx = -1;
1519 
1520 	for (i = 0; i < repo->pack_cache_size; i++) {
1521 		if (repo->packidx_cache[i] &&
1522 		    strcmp(repo->packidx_cache[i]->path_packidx,
1523 		    packidx->path_packidx) == 0)
1524 			pinned_packidx = i;
1525 		if (repo->packs[i].path_packfile &&
1526 		    strcmp(repo->packs[i].path_packfile,
1527 		    pack->path_packfile) == 0)
1528 			pinned_pack = i;
1529 	}
1530 
1531 	if (pinned_packidx == -1 || pinned_pack == -1)
1532 		return got_error(GOT_ERR_PIN_PACK);
1533 
1534 	repo->pinned_pack = pinned_pack;
1535 	repo->pinned_packidx = pinned_packidx;
1536 	repo->pinned_pid = repo->packs[pinned_pack].privsep_child->pid;
1537 	return NULL;
1538 }
1539 
1540 struct got_pack *
1541 got_repo_get_pinned_pack(struct got_repository *repo)
1542 {
1543 	if (repo->pinned_pack >= 0 &&
1544 	    repo->pinned_pack < repo->pack_cache_size)
1545 		return &repo->packs[repo->pinned_pack];
1546 
1547 	return NULL;
1548 }
1549 
1550 void
1551 got_repo_unpin_pack(struct got_repository *repo)
1552 {
1553 	repo->pinned_packidx = -1;
1554 	repo->pinned_pack = -1;
1555 	repo->pinned_pid = 0;
1556 }
1557 
1558 const struct got_error *
1559 got_repo_init(const char *repo_path)
1560 {
1561 	const struct got_error *err = NULL;
1562 	const char *dirnames[] = {
1563 		GOT_OBJECTS_DIR,
1564 		GOT_OBJECTS_PACK_DIR,
1565 		GOT_REFS_DIR,
1566 	};
1567 	const char *description_str = "Unnamed repository; "
1568 	    "edit this file 'description' to name the repository.";
1569 	const char *headref_str = "ref: refs/heads/main";
1570 	const char *gitconfig_str = "[core]\n"
1571 	    "\trepositoryformatversion = 0\n"
1572 	    "\tfilemode = true\n"
1573 	    "\tbare = true\n";
1574 	char *path;
1575 	size_t i;
1576 
1577 	if (!got_path_dir_is_empty(repo_path))
1578 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1579 
1580 	for (i = 0; i < nitems(dirnames); i++) {
1581 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1582 			return got_error_from_errno("asprintf");
1583 		}
1584 		err = got_path_mkdir(path);
1585 		free(path);
1586 		if (err)
1587 			return err;
1588 	}
1589 
1590 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1591 		return got_error_from_errno("asprintf");
1592 	err = got_path_create_file(path, description_str);
1593 	free(path);
1594 	if (err)
1595 		return err;
1596 
1597 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1598 		return got_error_from_errno("asprintf");
1599 	err = got_path_create_file(path, headref_str);
1600 	free(path);
1601 	if (err)
1602 		return err;
1603 
1604 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1605 		return got_error_from_errno("asprintf");
1606 	err = got_path_create_file(path, gitconfig_str);
1607 	free(path);
1608 	if (err)
1609 		return err;
1610 
1611 	return NULL;
1612 }
1613 
1614 static void
1615 purge_packidx_paths(struct got_pathlist_head *packidx_paths)
1616 {
1617 	struct got_pathlist_entry *pe;
1618 
1619 	while (!TAILQ_EMPTY(packidx_paths)) {
1620 		pe = TAILQ_FIRST(packidx_paths);
1621 		TAILQ_REMOVE(packidx_paths, pe, entry);
1622 		free((char *)pe->path);
1623 		free(pe);
1624 	}
1625 }
1626 
1627 static const struct got_error *
1628 match_packed_object(struct got_object_id **unique_id,
1629     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1630 {
1631 	const struct got_error *err = NULL;
1632 	struct got_object_id_queue matched_ids;
1633 	struct got_pathlist_entry *pe;
1634 	struct stat sb;
1635 
1636 	STAILQ_INIT(&matched_ids);
1637 
1638 	if (stat(got_repo_get_path_objects_pack(repo), &sb) == -1) {
1639 		if (errno != ENOENT)
1640 			return got_error_from_errno2("stat",
1641 			    got_repo_get_path_objects_pack(repo));
1642 	} else if (sb.st_mtime != repo->pack_path_mtime) {
1643 		purge_packidx_paths(&repo->packidx_paths);
1644 		err = got_repo_list_packidx(&repo->packidx_paths, repo);
1645 		if (err)
1646 			return err;
1647 	}
1648 
1649 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry) {
1650 		const char *path_packidx = pe->path;
1651 		struct got_packidx *packidx;
1652 		struct got_object_qid *qid;
1653 
1654 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1655 		    path_packidx, 0);
1656 		if (err)
1657 			break;
1658 
1659 		err = got_packidx_match_id_str_prefix(&matched_ids,
1660 		    packidx, id_str_prefix);
1661 		if (err) {
1662 			got_packidx_close(packidx);
1663 			break;
1664 		}
1665 		err = got_packidx_close(packidx);
1666 		if (err)
1667 			break;
1668 
1669 		STAILQ_FOREACH(qid, &matched_ids, entry) {
1670 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1671 				int matched_type;
1672 				err = got_object_get_type(&matched_type, repo,
1673 				    &qid->id);
1674 				if (err)
1675 					goto done;
1676 				if (matched_type != obj_type)
1677 					continue;
1678 			}
1679 			if (*unique_id == NULL) {
1680 				*unique_id = got_object_id_dup(&qid->id);
1681 				if (*unique_id == NULL) {
1682 					err = got_error_from_errno("malloc");
1683 					goto done;
1684 				}
1685 			} else {
1686 				if (got_object_id_cmp(*unique_id,
1687 				    &qid->id) == 0)
1688 					continue; /* packed multiple times */
1689 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1690 				goto done;
1691 			}
1692 		}
1693 	}
1694 done:
1695 	got_object_id_queue_free(&matched_ids);
1696 	if (err) {
1697 		free(*unique_id);
1698 		*unique_id = NULL;
1699 	}
1700 	return err;
1701 }
1702 
1703 static const struct got_error *
1704 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1705     const char *object_dir, const char *id_str_prefix, int obj_type,
1706     struct got_repository *repo)
1707 {
1708 	const struct got_error *err = NULL;
1709 	char *path, *id_str = NULL;
1710 	DIR *dir = NULL;
1711 	struct dirent *dent;
1712 	struct got_object_id id;
1713 
1714 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1715 		err = got_error_from_errno("asprintf");
1716 		goto done;
1717 	}
1718 
1719 	dir = opendir(path);
1720 	if (dir == NULL) {
1721 		if (errno == ENOENT) {
1722 			err = NULL;
1723 			goto done;
1724 		}
1725 		err = got_error_from_errno2("opendir", path);
1726 		goto done;
1727 	}
1728 	while ((dent = readdir(dir)) != NULL) {
1729 		int cmp;
1730 
1731 		free(id_str);
1732 		id_str = NULL;
1733 
1734 		if (strcmp(dent->d_name, ".") == 0 ||
1735 		    strcmp(dent->d_name, "..") == 0)
1736 			continue;
1737 
1738 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1739 			err = got_error_from_errno("asprintf");
1740 			goto done;
1741 		}
1742 
1743 		if (!got_parse_sha1_digest(id.sha1, id_str))
1744 			continue;
1745 
1746 		/*
1747 		 * Directory entries do not necessarily appear in
1748 		 * sorted order, so we must iterate over all of them.
1749 		 */
1750 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1751 		if (cmp != 0)
1752 			continue;
1753 
1754 		if (*unique_id == NULL) {
1755 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1756 				int matched_type;
1757 				err = got_object_get_type(&matched_type, repo,
1758 				    &id);
1759 				if (err)
1760 					goto done;
1761 				if (matched_type != obj_type)
1762 					continue;
1763 			}
1764 			*unique_id = got_object_id_dup(&id);
1765 			if (*unique_id == NULL) {
1766 				err = got_error_from_errno("got_object_id_dup");
1767 				goto done;
1768 			}
1769 		} else {
1770 			if (got_object_id_cmp(*unique_id, &id) == 0)
1771 				continue; /* both packed and loose */
1772 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1773 			goto done;
1774 		}
1775 	}
1776 done:
1777 	if (dir && closedir(dir) != 0 && err == NULL)
1778 		err = got_error_from_errno("closedir");
1779 	if (err) {
1780 		free(*unique_id);
1781 		*unique_id = NULL;
1782 	}
1783 	free(id_str);
1784 	free(path);
1785 	return err;
1786 }
1787 
1788 const struct got_error *
1789 got_repo_match_object_id_prefix(struct got_object_id **id,
1790     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1791 {
1792 	const struct got_error *err = NULL;
1793 	char *path_objects = got_repo_get_path_objects(repo);
1794 	char *object_dir = NULL;
1795 	size_t len;
1796 	int i;
1797 
1798 	*id = NULL;
1799 
1800 	len = strlen(id_str_prefix);
1801 	if (len > SHA1_DIGEST_STRING_LENGTH - 1)
1802 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1803 
1804 	for (i = 0; i < len; i++) {
1805 		if (isxdigit((unsigned char)id_str_prefix[i]))
1806 			continue;
1807 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1808 	}
1809 
1810 	if (len >= 2) {
1811 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1812 		if (err)
1813 			goto done;
1814 		object_dir = strndup(id_str_prefix, 2);
1815 		if (object_dir == NULL) {
1816 			err = got_error_from_errno("strdup");
1817 			goto done;
1818 		}
1819 		err = match_loose_object(id, path_objects, object_dir,
1820 		    id_str_prefix, obj_type, repo);
1821 	} else if (len == 1) {
1822 		int i;
1823 		for (i = 0; i < 0xf; i++) {
1824 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1825 			    == -1) {
1826 				err = got_error_from_errno("asprintf");
1827 				goto done;
1828 			}
1829 			err = match_packed_object(id, repo, object_dir,
1830 			    obj_type);
1831 			if (err)
1832 				goto done;
1833 			err = match_loose_object(id, path_objects, object_dir,
1834 			    id_str_prefix, obj_type, repo);
1835 			if (err)
1836 				goto done;
1837 		}
1838 	} else {
1839 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1840 		goto done;
1841 	}
1842 done:
1843 	free(object_dir);
1844 	if (err) {
1845 		free(*id);
1846 		*id = NULL;
1847 	} else if (*id == NULL) {
1848 		switch (obj_type) {
1849 		case GOT_OBJ_TYPE_BLOB:
1850 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1851 			    GOT_OBJ_LABEL_BLOB, id_str_prefix);
1852 			break;
1853 		case GOT_OBJ_TYPE_TREE:
1854 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1855 			    GOT_OBJ_LABEL_TREE, id_str_prefix);
1856 			break;
1857 		case GOT_OBJ_TYPE_COMMIT:
1858 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1859 			    GOT_OBJ_LABEL_COMMIT, id_str_prefix);
1860 			break;
1861 		case GOT_OBJ_TYPE_TAG:
1862 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1863 			    GOT_OBJ_LABEL_TAG, id_str_prefix);
1864 			break;
1865 		default:
1866 			err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1867 			break;
1868 		}
1869 	}
1870 
1871 	return err;
1872 }
1873 
1874 const struct got_error *
1875 got_repo_match_object_id(struct got_object_id **id, char **label,
1876     const char *id_str, int obj_type, struct got_reflist_head *refs,
1877     struct got_repository *repo)
1878 {
1879 	const struct got_error *err;
1880 	struct got_tag_object *tag;
1881 	struct got_reference *ref = NULL;
1882 
1883 	*id = NULL;
1884 	if (label)
1885 		*label = NULL;
1886 
1887 	if (refs) {
1888 		err = got_repo_object_match_tag(&tag, id_str, obj_type,
1889 		    refs, repo);
1890 		if (err == NULL) {
1891 			*id = got_object_id_dup(
1892 			    got_object_tag_get_object_id(tag));
1893 			if (*id == NULL)
1894 				err = got_error_from_errno("got_object_id_dup");
1895 			else if (label && asprintf(label, "refs/tags/%s",
1896 			    got_object_tag_get_name(tag)) == -1) {
1897 				err = got_error_from_errno("asprintf");
1898 				free(*id);
1899 				*id = NULL;
1900 			}
1901 			got_object_tag_close(tag);
1902 			return err;
1903 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1904 		    err->code != GOT_ERR_NO_OBJ)
1905 			return err;
1906 	}
1907 
1908 	err = got_ref_open(&ref, repo, id_str, 0);
1909 	if (err == NULL) {
1910 		err = got_ref_resolve(id, repo, ref);
1911 		if (err)
1912 			goto done;
1913 		if (label) {
1914 			*label = strdup(got_ref_get_name(ref));
1915 			if (*label == NULL) {
1916 				err = got_error_from_errno("strdup");
1917 				goto done;
1918 			}
1919 		}
1920 	} else {
1921 		if (err->code != GOT_ERR_NOT_REF &&
1922 		    err->code != GOT_ERR_BAD_REF_NAME)
1923 			goto done;
1924 		err = got_repo_match_object_id_prefix(id, id_str,
1925 		    obj_type, repo);
1926 		if (err) {
1927 			if (err->code == GOT_ERR_BAD_OBJ_ID_STR)
1928 				err = got_error_not_ref(id_str);
1929 			goto done;
1930 		}
1931 		if (label) {
1932 			err = got_object_id_str(label, *id);
1933 			if (*label == NULL) {
1934 				err = got_error_from_errno("strdup");
1935 				goto done;
1936 			}
1937 		}
1938 	}
1939 done:
1940 	if (ref)
1941 		got_ref_close(ref);
1942 	return err;
1943 }
1944 
1945 const struct got_error *
1946 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1947     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1948 {
1949 	const struct got_error *err = NULL;
1950 	struct got_reflist_entry *re;
1951 	struct got_object_id *tag_id;
1952 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1953 
1954 	*tag = NULL;
1955 
1956 	TAILQ_FOREACH(re, refs, entry) {
1957 		const char *refname;
1958 		refname = got_ref_get_name(re->ref);
1959 		if (got_ref_is_symbolic(re->ref))
1960 			continue;
1961 		if (strncmp(refname, "refs/tags/", 10) != 0)
1962 			continue;
1963 		if (!name_is_absolute)
1964 			refname += strlen("refs/tags/");
1965 		if (strcmp(refname, name) != 0)
1966 			continue;
1967 		err = got_ref_resolve(&tag_id, repo, re->ref);
1968 		if (err)
1969 			break;
1970 		err = got_object_open_as_tag(tag, repo, tag_id);
1971 		free(tag_id);
1972 		if (err)
1973 			break;
1974 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1975 		    got_object_tag_get_object_type(*tag) == obj_type)
1976 			break;
1977 		got_object_tag_close(*tag);
1978 		*tag = NULL;
1979 	}
1980 
1981 	if (err == NULL && *tag == NULL)
1982 		err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1983 		    GOT_OBJ_LABEL_TAG, name);
1984 	return err;
1985 }
1986 
1987 static const struct got_error *
1988 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1989     const char *name, mode_t mode, struct got_object_id *blob_id)
1990 {
1991 	const struct got_error *err = NULL;
1992 
1993 	 *new_te = NULL;
1994 
1995 	*new_te = calloc(1, sizeof(**new_te));
1996 	if (*new_te == NULL)
1997 		return got_error_from_errno("calloc");
1998 
1999 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
2000 	    sizeof((*new_te)->name)) {
2001 		err = got_error(GOT_ERR_NO_SPACE);
2002 		goto done;
2003 	}
2004 
2005 	if (S_ISLNK(mode)) {
2006 		(*new_te)->mode = S_IFLNK;
2007 	} else {
2008 		(*new_te)->mode = S_IFREG;
2009 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
2010 	}
2011 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
2012 done:
2013 	if (err && *new_te) {
2014 		free(*new_te);
2015 		*new_te = NULL;
2016 	}
2017 	return err;
2018 }
2019 
2020 static const struct got_error *
2021 import_file(struct got_tree_entry **new_te, struct dirent *de,
2022     const char *path, struct got_repository *repo)
2023 {
2024 	const struct got_error *err;
2025 	struct got_object_id *blob_id = NULL;
2026 	char *filepath;
2027 	struct stat sb;
2028 
2029 	if (asprintf(&filepath, "%s%s%s", path,
2030 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
2031 		return got_error_from_errno("asprintf");
2032 
2033 	if (lstat(filepath, &sb) != 0) {
2034 		err = got_error_from_errno2("lstat", path);
2035 		goto done;
2036 	}
2037 
2038 	err = got_object_blob_create(&blob_id, filepath, repo);
2039 	if (err)
2040 		goto done;
2041 
2042 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
2043 	    blob_id);
2044 done:
2045 	free(filepath);
2046 	if (err)
2047 		free(blob_id);
2048 	return err;
2049 }
2050 
2051 static const struct got_error *
2052 insert_tree_entry(struct got_tree_entry *new_te,
2053     struct got_pathlist_head *paths)
2054 {
2055 	const struct got_error *err = NULL;
2056 	struct got_pathlist_entry *new_pe;
2057 
2058 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
2059 	if (err)
2060 		return err;
2061 	if (new_pe == NULL)
2062 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
2063 	return NULL;
2064 }
2065 
2066 static const struct got_error *write_tree(struct got_object_id **,
2067     const char *, struct got_pathlist_head *, struct got_repository *,
2068     got_repo_import_cb progress_cb, void *progress_arg);
2069 
2070 static const struct got_error *
2071 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
2072     const char *path, struct got_pathlist_head *ignores,
2073     struct got_repository *repo,
2074     got_repo_import_cb progress_cb, void *progress_arg)
2075 {
2076 	const struct got_error *err;
2077 	struct got_object_id *id = NULL;
2078 	char *subdirpath;
2079 
2080 	if (asprintf(&subdirpath, "%s%s%s", path,
2081 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
2082 		return got_error_from_errno("asprintf");
2083 
2084 	(*new_te) = calloc(1, sizeof(**new_te));
2085 	if (*new_te == NULL)
2086 		return got_error_from_errno("calloc");
2087 	(*new_te)->mode = S_IFDIR;
2088 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
2089 	    sizeof((*new_te)->name)) {
2090 		err = got_error(GOT_ERR_NO_SPACE);
2091 		goto done;
2092 	}
2093 	err = write_tree(&id, subdirpath, ignores,  repo,
2094 	    progress_cb, progress_arg);
2095 	if (err)
2096 		goto done;
2097 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
2098 
2099 done:
2100 	free(id);
2101 	free(subdirpath);
2102 	if (err) {
2103 		free(*new_te);
2104 		*new_te = NULL;
2105 	}
2106 	return err;
2107 }
2108 
2109 static const struct got_error *
2110 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
2111     struct got_pathlist_head *ignores, struct got_repository *repo,
2112     got_repo_import_cb progress_cb, void *progress_arg)
2113 {
2114 	const struct got_error *err = NULL;
2115 	DIR *dir;
2116 	struct dirent *de;
2117 	int nentries;
2118 	struct got_tree_entry *new_te = NULL;
2119 	struct got_pathlist_head paths;
2120 	struct got_pathlist_entry *pe;
2121 
2122 	*new_tree_id = NULL;
2123 
2124 	TAILQ_INIT(&paths);
2125 
2126 	dir = opendir(path_dir);
2127 	if (dir == NULL) {
2128 		err = got_error_from_errno2("opendir", path_dir);
2129 		goto done;
2130 	}
2131 
2132 	nentries = 0;
2133 	while ((de = readdir(dir)) != NULL) {
2134 		int ignore = 0;
2135 		int type;
2136 
2137 		if (strcmp(de->d_name, ".") == 0 ||
2138 		    strcmp(de->d_name, "..") == 0)
2139 			continue;
2140 
2141 		TAILQ_FOREACH(pe, ignores, entry) {
2142 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
2143 				ignore = 1;
2144 				break;
2145 			}
2146 		}
2147 		if (ignore)
2148 			continue;
2149 
2150 		err = got_path_dirent_type(&type, path_dir, de);
2151 		if (err)
2152 			goto done;
2153 
2154 		if (type == DT_DIR) {
2155 			err = import_subdir(&new_te, de, path_dir,
2156 			    ignores, repo, progress_cb, progress_arg);
2157 			if (err) {
2158 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
2159 					goto done;
2160 				err = NULL;
2161 				continue;
2162 			}
2163 		} else if (type == DT_REG || type == DT_LNK) {
2164 			err = import_file(&new_te, de, path_dir, repo);
2165 			if (err)
2166 				goto done;
2167 		} else
2168 			continue;
2169 
2170 		err = insert_tree_entry(new_te, &paths);
2171 		if (err)
2172 			goto done;
2173 		nentries++;
2174 	}
2175 
2176 	if (TAILQ_EMPTY(&paths)) {
2177 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
2178 		    "cannot create tree without any entries");
2179 		goto done;
2180 	}
2181 
2182 	TAILQ_FOREACH(pe, &paths, entry) {
2183 		struct got_tree_entry *te = pe->data;
2184 		char *path;
2185 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
2186 			continue;
2187 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
2188 			err = got_error_from_errno("asprintf");
2189 			goto done;
2190 		}
2191 		err = (*progress_cb)(progress_arg, path);
2192 		free(path);
2193 		if (err)
2194 			goto done;
2195 	}
2196 
2197 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
2198 done:
2199 	if (dir)
2200 		closedir(dir);
2201 	got_pathlist_free(&paths);
2202 	return err;
2203 }
2204 
2205 const struct got_error *
2206 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
2207     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
2208     struct got_repository *repo, got_repo_import_cb progress_cb,
2209     void *progress_arg)
2210 {
2211 	const struct got_error *err;
2212 	struct got_object_id *new_tree_id;
2213 
2214 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
2215 	    progress_cb, progress_arg);
2216 	if (err)
2217 		return err;
2218 
2219 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
2220 	    author, time(NULL), author, time(NULL), logmsg, repo);
2221 	free(new_tree_id);
2222 	return err;
2223 }
2224 
2225 const struct got_error *
2226 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
2227     struct got_repository *repo)
2228 {
2229 	const struct got_error *err = NULL;
2230 	char *path_objects = NULL, *path = NULL;
2231 	DIR *dir = NULL;
2232 	struct got_object_id id;
2233 	int i;
2234 
2235 	*nobjects = 0;
2236 	*ondisk_size = 0;
2237 
2238 	path_objects = got_repo_get_path_objects(repo);
2239 	if (path_objects == NULL)
2240 		return got_error_from_errno("got_repo_get_path_objects");
2241 
2242 	for (i = 0; i <= 0xff; i++) {
2243 		struct dirent *dent;
2244 
2245 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
2246 			err = got_error_from_errno("asprintf");
2247 			break;
2248 		}
2249 
2250 		dir = opendir(path);
2251 		if (dir == NULL) {
2252 			if (errno == ENOENT) {
2253 				err = NULL;
2254 				continue;
2255 			}
2256 			err = got_error_from_errno2("opendir", path);
2257 			break;
2258 		}
2259 
2260 		while ((dent = readdir(dir)) != NULL) {
2261 			char *id_str;
2262 			int fd;
2263 			struct stat sb;
2264 
2265 			if (strcmp(dent->d_name, ".") == 0 ||
2266 			    strcmp(dent->d_name, "..") == 0)
2267 				continue;
2268 
2269 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
2270 				err = got_error_from_errno("asprintf");
2271 				goto done;
2272 			}
2273 
2274 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
2275 				free(id_str);
2276 				continue;
2277 			}
2278 			free(id_str);
2279 
2280 			err = got_object_open_loose_fd(&fd, &id, repo);
2281 			if (err)
2282 				goto done;
2283 
2284 			if (fstat(fd, &sb) == -1) {
2285 				err = got_error_from_errno("fstat");
2286 				close(fd);
2287 				goto done;
2288 			}
2289 			(*nobjects)++;
2290 			(*ondisk_size) += sb.st_size;
2291 
2292 			if (close(fd) == -1) {
2293 				err = got_error_from_errno("close");
2294 				goto done;
2295 			}
2296 		}
2297 
2298 		if (closedir(dir) != 0) {
2299 			err = got_error_from_errno("closedir");
2300 			goto done;
2301 		}
2302 		dir = NULL;
2303 
2304 		free(path);
2305 		path = NULL;
2306 	}
2307 done:
2308 	if (dir && closedir(dir) != 0 && err == NULL)
2309 		err = got_error_from_errno("closedir");
2310 
2311 	if (err) {
2312 		*nobjects = 0;
2313 		*ondisk_size = 0;
2314 	}
2315 	free(path_objects);
2316 	free(path);
2317 	return err;
2318 }
2319 
2320 const struct got_error *
2321 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
2322     off_t *total_packsize, struct got_repository *repo)
2323 {
2324 	const struct got_error *err = NULL;
2325 	DIR *packdir = NULL;
2326 	struct dirent *dent;
2327 	struct got_packidx *packidx = NULL;
2328 	char *path_packidx;
2329 	char *path_packfile;
2330 	int packdir_fd;
2331 	struct stat sb;
2332 
2333 	*npackfiles = 0;
2334 	*nobjects = 0;
2335 	*total_packsize = 0;
2336 
2337 	packdir_fd = openat(got_repo_get_fd(repo),
2338 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
2339 	if (packdir_fd == -1) {
2340 		return got_error_from_errno_fmt("openat: %s/%s",
2341 		    got_repo_get_path_git_dir(repo),
2342 		    GOT_OBJECTS_PACK_DIR);
2343 	}
2344 
2345 	packdir = fdopendir(packdir_fd);
2346 	if (packdir == NULL) {
2347 		err = got_error_from_errno("fdopendir");
2348 		goto done;
2349 	}
2350 
2351 	while ((dent = readdir(packdir)) != NULL) {
2352 		if (!got_repo_is_packidx_filename(dent->d_name,
2353 		    strlen(dent->d_name)))
2354 			continue;
2355 
2356 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
2357 		    dent->d_name) == -1) {
2358 			err = got_error_from_errno("asprintf");
2359 			goto done;
2360 		}
2361 
2362 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
2363 		    path_packidx, 0);
2364 		free(path_packidx);
2365 		if (err)
2366 			goto done;
2367 
2368 		if (fstat(packidx->fd, &sb) == -1)
2369 			goto done;
2370 		*total_packsize += sb.st_size;
2371 
2372 		err = got_packidx_get_packfile_path(&path_packfile,
2373 		    packidx->path_packidx);
2374 		if (err)
2375 			goto done;
2376 
2377 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
2378 		    0) == -1) {
2379 			free(path_packfile);
2380 			goto done;
2381 		}
2382 		free(path_packfile);
2383 		*total_packsize += sb.st_size;
2384 
2385 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
2386 
2387 		(*npackfiles)++;
2388 
2389 		got_packidx_close(packidx);
2390 		packidx = NULL;
2391 	}
2392 done:
2393 	if (packidx)
2394 		got_packidx_close(packidx);
2395 	if (packdir && closedir(packdir) != 0 && err == NULL)
2396 		err = got_error_from_errno("closedir");
2397 	if (err) {
2398 		*npackfiles = 0;
2399 		*nobjects = 0;
2400 		*total_packsize = 0;
2401 	}
2402 	return err;
2403 }
2404 
2405 RB_GENERATE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
2406     got_packidx_bloom_filter_cmp);