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 
24 #include <ctype.h>
25 #include <endian.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 <sha1.h>
33 #include <string.h>
34 #include <time.h>
35 #include <unistd.h>
36 #include <zlib.h>
37 #include <errno.h>
38 #include <libgen.h>
39 #include <stdint.h>
40 #include <imsg.h>
41 #include <uuid.h>
42 
43 #include "got_error.h"
44 #include "got_reference.h"
45 #include "got_repository.h"
46 #include "got_path.h"
47 #include "got_cancel.h"
48 #include "got_worktree.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_worktree.h"
59 #include "got_lib_sha1.h"
60 #include "got_lib_object_cache.h"
61 #include "got_lib_repository.h"
62 #include "got_lib_gotconfig.h"
63 
64 #ifndef nitems
65 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
66 #endif
67 
68 const char *
69 got_repo_get_path(struct got_repository *repo)
70 {
71 	return repo->path;
72 }
73 
74 const char *
75 got_repo_get_path_git_dir(struct got_repository *repo)
76 {
77 	return repo->path_git_dir;
78 }
79 
80 const char *
81 got_repo_get_gitconfig_author_name(struct got_repository *repo)
82 {
83 	return repo->gitconfig_author_name;
84 }
85 
86 const char *
87 got_repo_get_gitconfig_author_email(struct got_repository *repo)
88 {
89 	return repo->gitconfig_author_email;
90 }
91 
92 const char *
93 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
94 {
95 	return repo->global_gitconfig_author_name;
96 }
97 
98 const char *
99 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
100 {
101 	return repo->global_gitconfig_author_email;
102 }
103 
104 const char *
105 got_repo_get_gitconfig_owner(struct got_repository *repo)
106 {
107 	return repo->gitconfig_owner;
108 }
109 
110 int
111 got_repo_is_bare(struct got_repository *repo)
112 {
113 	return (strcmp(repo->path, repo->path_git_dir) == 0);
114 }
115 
116 static char *
117 get_path_git_child(struct got_repository *repo, const char *basename)
118 {
119 	char *path_child;
120 
121 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
122 	    basename) == -1)
123 		return NULL;
124 
125 	return path_child;
126 }
127 
128 char *
129 got_repo_get_path_objects(struct got_repository *repo)
130 {
131 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
132 }
133 
134 char *
135 got_repo_get_path_objects_pack(struct got_repository *repo)
136 {
137 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
138 }
139 
140 char *
141 got_repo_get_path_refs(struct got_repository *repo)
142 {
143 	return get_path_git_child(repo, GOT_REFS_DIR);
144 }
145 
146 char *
147 got_repo_get_path_packed_refs(struct got_repository *repo)
148 {
149 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
150 }
151 
152 static char *
153 get_path_head(struct got_repository *repo)
154 {
155 	return get_path_git_child(repo, GOT_HEAD_FILE);
156 }
157 
158 char *
159 got_repo_get_path_gitconfig(struct got_repository *repo)
160 {
161 	return get_path_git_child(repo, GOT_GITCONFIG);
162 }
163 
164 char *
165 got_repo_get_path_gotconfig(struct got_repository *repo)
166 {
167 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
168 }
169 
170 const struct got_gotconfig *
171 got_repo_get_gotconfig(struct got_repository *repo)
172 {
173 	return repo->gotconfig;
174 }
175 
176 void
177 got_repo_get_gitconfig_remotes(int *nremotes,
178     const struct got_remote_repo **remotes, struct got_repository *repo)
179 {
180 	*nremotes = repo->ngitconfig_remotes;
181 	*remotes = repo->gitconfig_remotes;
182 }
183 
184 static int
185 is_git_repo(struct got_repository *repo)
186 {
187 	const char *path_git = got_repo_get_path_git_dir(repo);
188 	char *path_objects = got_repo_get_path_objects(repo);
189 	char *path_refs = got_repo_get_path_refs(repo);
190 	char *path_head = get_path_head(repo);
191 	int ret = 0;
192 	struct stat sb;
193 	struct got_reference *head_ref;
194 
195 	if (lstat(path_git, &sb) == -1)
196 		goto done;
197 	if (!S_ISDIR(sb.st_mode))
198 		goto done;
199 
200 	if (lstat(path_objects, &sb) == -1)
201 		goto done;
202 	if (!S_ISDIR(sb.st_mode))
203 		goto done;
204 
205 	if (lstat(path_refs, &sb) == -1)
206 		goto done;
207 	if (!S_ISDIR(sb.st_mode))
208 		goto done;
209 
210 	if (lstat(path_head, &sb) == -1)
211 		goto done;
212 	if (!S_ISREG(sb.st_mode))
213 		goto done;
214 
215 	/* Check if the HEAD reference can be opened. */
216 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
217 		goto done;
218 	got_ref_close(head_ref);
219 
220 	ret = 1;
221 done:
222 	free(path_objects);
223 	free(path_refs);
224 	free(path_head);
225 	return ret;
226 
227 }
228 
229 const struct got_error *
230 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
231     struct got_object *obj)
232 {
233 #ifndef GOT_NO_OBJ_CACHE
234 	const struct got_error *err = NULL;
235 	err = got_object_cache_add(&repo->objcache, id, obj);
236 	if (err) {
237 		if (err->code == GOT_ERR_OBJ_EXISTS ||
238 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
239 			err = NULL;
240 		return err;
241 	}
242 	obj->refcnt++;
243 #endif
244 	return NULL;
245 }
246 
247 struct got_object *
248 got_repo_get_cached_object(struct got_repository *repo,
249     struct got_object_id *id)
250 {
251 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
252 }
253 
254 const struct got_error *
255 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
256     struct got_tree_object *tree)
257 {
258 #ifndef GOT_NO_OBJ_CACHE
259 	const struct got_error *err = NULL;
260 	err = got_object_cache_add(&repo->treecache, id, tree);
261 	if (err) {
262 		if (err->code == GOT_ERR_OBJ_EXISTS ||
263 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
264 			err = NULL;
265 		return err;
266 	}
267 	tree->refcnt++;
268 #endif
269 	return NULL;
270 }
271 
272 struct got_tree_object *
273 got_repo_get_cached_tree(struct got_repository *repo,
274     struct got_object_id *id)
275 {
276 	return (struct got_tree_object *)got_object_cache_get(
277 	    &repo->treecache, id);
278 }
279 
280 const struct got_error *
281 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
282     struct got_commit_object *commit)
283 {
284 #ifndef GOT_NO_OBJ_CACHE
285 	const struct got_error *err = NULL;
286 	err = got_object_cache_add(&repo->commitcache, id, commit);
287 	if (err) {
288 		if (err->code == GOT_ERR_OBJ_EXISTS ||
289 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
290 			err = NULL;
291 		return err;
292 	}
293 	commit->refcnt++;
294 #endif
295 	return NULL;
296 }
297 
298 struct got_commit_object *
299 got_repo_get_cached_commit(struct got_repository *repo,
300     struct got_object_id *id)
301 {
302 	return (struct got_commit_object *)got_object_cache_get(
303 	    &repo->commitcache, id);
304 }
305 
306 const struct got_error *
307 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
308     struct got_tag_object *tag)
309 {
310 #ifndef GOT_NO_OBJ_CACHE
311 	const struct got_error *err = NULL;
312 	err = got_object_cache_add(&repo->tagcache, id, tag);
313 	if (err) {
314 		if (err->code == GOT_ERR_OBJ_EXISTS ||
315 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
316 			err = NULL;
317 		return err;
318 	}
319 	tag->refcnt++;
320 #endif
321 	return NULL;
322 }
323 
324 struct got_tag_object *
325 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
326 {
327 	return (struct got_tag_object *)got_object_cache_get(
328 	    &repo->tagcache, id);
329 }
330 
331 const struct got_error *
332 open_repo(struct got_repository *repo, const char *path)
333 {
334 	const struct got_error *err = NULL;
335 
336 	/* bare git repository? */
337 	repo->path_git_dir = strdup(path);
338 	if (repo->path_git_dir == NULL)
339 		return got_error_from_errno("strdup");
340 	if (is_git_repo(repo)) {
341 		repo->path = strdup(repo->path_git_dir);
342 		if (repo->path == NULL) {
343 			err = got_error_from_errno("strdup");
344 			goto done;
345 		}
346 		return NULL;
347 	}
348 
349 	/* git repository with working tree? */
350 	free(repo->path_git_dir);
351 	repo->path_git_dir = NULL;
352 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
353 		err = got_error_from_errno("asprintf");
354 		goto done;
355 	}
356 	if (is_git_repo(repo)) {
357 		repo->path = strdup(path);
358 		if (repo->path == NULL) {
359 			err = got_error_from_errno("strdup");
360 			goto done;
361 		}
362 		return NULL;
363 	}
364 
365 	err = got_error(GOT_ERR_NOT_GIT_REPO);
366 done:
367 	if (err) {
368 		free(repo->path);
369 		repo->path = NULL;
370 		free(repo->path_git_dir);
371 		repo->path_git_dir = NULL;
372 	}
373 	return err;
374 }
375 
376 static const struct got_error *
377 parse_gitconfig_file(int *gitconfig_repository_format_version,
378     char **gitconfig_author_name, char **gitconfig_author_email,
379     struct got_remote_repo **remotes, int *nremotes,
380     char **gitconfig_owner,
381     const char *gitconfig_path)
382 {
383 	const struct got_error *err = NULL, *child_err = NULL;
384 	int fd = -1;
385 	int imsg_fds[2] = { -1, -1 };
386 	pid_t pid;
387 	struct imsgbuf *ibuf;
388 
389 	*gitconfig_repository_format_version = 0;
390 	*gitconfig_author_name = NULL;
391 	*gitconfig_author_email = NULL;
392 	if (remotes)
393 		*remotes = NULL;
394 	if (nremotes)
395 		*nremotes = 0;
396 	if (gitconfig_owner)
397 		*gitconfig_owner = NULL;
398 
399 	fd = open(gitconfig_path, O_RDONLY);
400 	if (fd == -1) {
401 		if (errno == ENOENT)
402 			return NULL;
403 		return got_error_from_errno2("open", gitconfig_path);
404 	}
405 
406 	ibuf = calloc(1, sizeof(*ibuf));
407 	if (ibuf == NULL) {
408 		err = got_error_from_errno("calloc");
409 		goto done;
410 	}
411 
412 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
413 		err = got_error_from_errno("socketpair");
414 		goto done;
415 	}
416 
417 	pid = fork();
418 	if (pid == -1) {
419 		err = got_error_from_errno("fork");
420 		goto done;
421 	} else if (pid == 0) {
422 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
423 		    gitconfig_path);
424 		/* not reached */
425 	}
426 
427 	if (close(imsg_fds[1]) == -1) {
428 		err = got_error_from_errno("close");
429 		goto done;
430 	}
431 	imsg_fds[1] = -1;
432 	imsg_init(ibuf, imsg_fds[0]);
433 
434 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
435 	if (err)
436 		goto done;
437 	fd = -1;
438 
439 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
440 	if (err)
441 		goto done;
442 
443 	err = got_privsep_recv_gitconfig_int(
444 	    gitconfig_repository_format_version, ibuf);
445 	if (err)
446 		goto done;
447 
448 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
449 	if (err)
450 		goto done;
451 
452 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
453 	if (err)
454 		goto done;
455 
456 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
457 	if (err)
458 		goto done;
459 
460 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
461 	if (err)
462 		goto done;
463 
464 	if (remotes && nremotes) {
465 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
466 		if (err)
467 			goto done;
468 
469 		err = got_privsep_recv_gitconfig_remotes(remotes,
470 		    nremotes, ibuf);
471 		if (err)
472 			goto done;
473 	}
474 
475 	if (gitconfig_owner) {
476 		err = got_privsep_send_gitconfig_owner_req(ibuf);
477 		if (err)
478 			goto done;
479 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
480 		if (err)
481 			goto done;
482 	}
483 
484 	imsg_clear(ibuf);
485 	err = got_privsep_send_stop(imsg_fds[0]);
486 	child_err = got_privsep_wait_for_child(pid);
487 	if (child_err && err == NULL)
488 		err = child_err;
489 done:
490 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
491 		err = got_error_from_errno("close");
492 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
493 		err = got_error_from_errno("close");
494 	if (fd != -1 && close(fd) == -1 && err == NULL)
495 		err = got_error_from_errno2("close", gitconfig_path);
496 	free(ibuf);
497 	return err;
498 }
499 
500 static const struct got_error *
501 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
502 {
503 	const struct got_error *err = NULL;
504 	char *repo_gitconfig_path = NULL;
505 
506 	if (global_gitconfig_path) {
507 		/* Read settings from ~/.gitconfig. */
508 		int dummy_repo_version;
509 		err = parse_gitconfig_file(&dummy_repo_version,
510 		    &repo->global_gitconfig_author_name,
511 		    &repo->global_gitconfig_author_email,
512 		    NULL, NULL, NULL, global_gitconfig_path);
513 		if (err)
514 			return err;
515 	}
516 
517 	/* Read repository's .git/config file. */
518 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
519 	if (repo_gitconfig_path == NULL)
520 		return got_error_from_errno("got_repo_get_path_gitconfig");
521 
522 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
523 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
524 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
525 	    &repo->gitconfig_owner, repo_gitconfig_path);
526 	if (err)
527 		goto done;
528 done:
529 	free(repo_gitconfig_path);
530 	return err;
531 }
532 
533 static const struct got_error *
534 read_gotconfig(struct got_repository *repo)
535 {
536 	const struct got_error *err = NULL;
537 	char *gotconfig_path;
538 
539 	gotconfig_path = got_repo_get_path_gotconfig(repo);
540 	if (gotconfig_path == NULL)
541 		return got_error_from_errno("got_repo_get_path_gotconfig");
542 
543 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
544 	free(gotconfig_path);
545 	return err;
546 }
547 
548 const struct got_error *
549 got_repo_open(struct got_repository **repop, const char *path,
550     const char *global_gitconfig_path)
551 {
552 	struct got_repository *repo = NULL;
553 	const struct got_error *err = NULL;
554 	char *abspath;
555 	int i, tried_root = 0;
556 
557 	*repop = NULL;
558 
559 	if (got_path_is_absolute(path))
560 		abspath = strdup(path);
561 	else
562 		abspath = got_path_get_absolute(path);
563 	if (abspath == NULL)
564 		return got_error_path(path, GOT_ERR_BAD_PATH);
565 
566 	repo = calloc(1, sizeof(*repo));
567 	if (repo == NULL) {
568 		err = got_error_from_errno("calloc");
569 		goto done;
570 	}
571 
572 	for (i = 0; i < nitems(repo->privsep_children); i++) {
573 		memset(&repo->privsep_children[i], 0,
574 		    sizeof(repo->privsep_children[0]));
575 		repo->privsep_children[i].imsg_fd = -1;
576 	}
577 
578 	err = got_object_cache_init(&repo->objcache,
579 	    GOT_OBJECT_CACHE_TYPE_OBJ);
580 	if (err)
581 		goto done;
582 	err = got_object_cache_init(&repo->treecache,
583 	    GOT_OBJECT_CACHE_TYPE_TREE);
584 	if (err)
585 		goto done;
586 	err = got_object_cache_init(&repo->commitcache,
587 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
588 	if (err)
589 		goto done;
590 	err = got_object_cache_init(&repo->tagcache,
591 	    GOT_OBJECT_CACHE_TYPE_TAG);
592 	if (err)
593 		goto done;
594 
595 	path = realpath(abspath, NULL);
596 	if (path == NULL) {
597 		err = got_error_from_errno2("realpath", abspath);
598 		goto done;
599 	}
600 
601 	do {
602 		err = open_repo(repo, path);
603 		if (err == NULL)
604 			break;
605 		if (err->code != GOT_ERR_NOT_GIT_REPO)
606 			break;
607 		if (path[0] == '/' && path[1] == '\0') {
608 			if (tried_root) {
609 				err = got_error(GOT_ERR_NOT_GIT_REPO);
610 				goto done;
611 			}
612 			tried_root = 1;
613 		}
614 		path = dirname(path);
615 		if (path == NULL) {
616 			err = got_error_from_errno2("dirname", path);
617 			goto done;
618 		}
619 	} while (path);
620 
621 	err = read_gotconfig(repo);
622 	if (err)
623 		goto done;
624 
625 	err = read_gitconfig(repo, global_gitconfig_path);
626 	if (err)
627 		goto done;
628 	if (repo->gitconfig_repository_format_version != 0)
629 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
630 done:
631 	if (err)
632 		got_repo_close(repo);
633 	else
634 		*repop = repo;
635 	free(abspath);
636 	return err;
637 }
638 
639 const struct got_error *
640 got_repo_close(struct got_repository *repo)
641 {
642 	const struct got_error *err = NULL, *child_err;
643 	int i;
644 
645 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
646 		if (repo->packidx_cache[i] == NULL)
647 			break;
648 		got_packidx_close(repo->packidx_cache[i]);
649 	}
650 
651 	for (i = 0; i < nitems(repo->packs); i++) {
652 		if (repo->packs[i].path_packfile == NULL)
653 			break;
654 		got_pack_close(&repo->packs[i]);
655 	}
656 
657 	free(repo->path);
658 	free(repo->path_git_dir);
659 
660 	got_object_cache_close(&repo->objcache);
661 	got_object_cache_close(&repo->treecache);
662 	got_object_cache_close(&repo->commitcache);
663 	got_object_cache_close(&repo->tagcache);
664 
665 	for (i = 0; i < nitems(repo->privsep_children); i++) {
666 		if (repo->privsep_children[i].imsg_fd == -1)
667 			continue;
668 		imsg_clear(repo->privsep_children[i].ibuf);
669 		free(repo->privsep_children[i].ibuf);
670 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
671 		child_err = got_privsep_wait_for_child(
672 		    repo->privsep_children[i].pid);
673 		if (child_err && err == NULL)
674 			err = child_err;
675 		if (close(repo->privsep_children[i].imsg_fd) != 0 &&
676 		    err == NULL)
677 			err = got_error_from_errno("close");
678 	}
679 
680 	if (repo->gotconfig)
681 		got_gotconfig_free(repo->gotconfig);
682 	free(repo->gitconfig_author_name);
683 	free(repo->gitconfig_author_email);
684 	for (i = 0; i < repo->ngitconfig_remotes; i++)
685 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
686 	free(repo->gitconfig_remotes);
687 	free(repo);
688 
689 	return err;
690 }
691 
692 void
693 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
694 {
695 	int i;
696 
697 	free(repo->name);
698 	repo->name = NULL;
699 	free(repo->url);
700 	repo->url = NULL;
701 	for (i = 0; i < repo->nbranches; i++)
702 		free(repo->branches[i]);
703 	free(repo->branches);
704 	repo->branches = NULL;
705 	repo->nbranches = 0;
706 }
707 
708 const struct got_error *
709 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
710     const char *input_path, int check_disk)
711 {
712 	const struct got_error *err = NULL;
713 	const char *repo_abspath = NULL;
714 	size_t repolen, len;
715 	char *canonpath, *path = NULL;
716 
717 	*in_repo_path = NULL;
718 
719 	canonpath = strdup(input_path);
720 	if (canonpath == NULL) {
721 		err = got_error_from_errno("strdup");
722 		goto done;
723 	}
724 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
725 	if (err)
726 		goto done;
727 
728 	repo_abspath = got_repo_get_path(repo);
729 
730 	if (!check_disk || canonpath[0] == '\0') {
731 		path = strdup(canonpath);
732 		if (path == NULL) {
733 			err = got_error_from_errno("strdup");
734 			goto done;
735 		}
736 	} else {
737 		path = realpath(canonpath, NULL);
738 		if (path == NULL) {
739 			if (errno != ENOENT) {
740 				err = got_error_from_errno2("realpath",
741 				    canonpath);
742 				goto done;
743 			}
744 			/*
745 			 * Path is not on disk.
746 			 * Assume it is already relative to repository root.
747 			 */
748 			path = strdup(canonpath);
749 			if (path == NULL) {
750 				err = got_error_from_errno("strdup");
751 				goto done;
752 			}
753 		}
754 
755 		repolen = strlen(repo_abspath);
756 		len = strlen(path);
757 
758 
759 		if (strcmp(path, repo_abspath) == 0) {
760 			free(path);
761 			path = strdup("");
762 			if (path == NULL) {
763 				err = got_error_from_errno("strdup");
764 				goto done;
765 			}
766 		} else if (len > repolen &&
767 		    got_path_is_child(path, repo_abspath, repolen)) {
768 			/* Matched an on-disk path inside repository. */
769 			if (got_repo_is_bare(repo)) {
770 				/*
771 				 * Matched an on-disk path inside repository
772 				 * database. Treat as repository-relative.
773 				 */
774 			} else {
775 				char *child;
776 				/* Strip common prefix with repository path. */
777 				err = got_path_skip_common_ancestor(&child,
778 				    repo_abspath, path);
779 				if (err)
780 					goto done;
781 				free(path);
782 				path = child;
783 			}
784 		} else {
785 			/*
786 			 * Matched unrelated on-disk path.
787 			 * Treat it as repository-relative.
788 			 */
789 		}
790 	}
791 
792 	/* Make in-repository path absolute */
793 	if (path[0] != '/') {
794 		char *abspath;
795 		if (asprintf(&abspath, "/%s", path) == -1) {
796 			err = got_error_from_errno("asprintf");
797 			goto done;
798 		}
799 		free(path);
800 		path = abspath;
801 	}
802 
803 done:
804 	free(canonpath);
805 	if (err)
806 		free(path);
807 	else
808 		*in_repo_path = path;
809 	return err;
810 }
811 
812 static const struct got_error *
813 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
814     const char *path_packidx)
815 {
816 	const struct got_error *err = NULL;
817 	int i;
818 
819 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
820 		if (repo->packidx_cache[i] == NULL)
821 			break;
822 		if (strcmp(repo->packidx_cache[i]->path_packidx,
823 		    path_packidx) == 0) {
824 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
825 		}
826 	}
827 	if (i == nitems(repo->packidx_cache)) {
828 		err = got_packidx_close(repo->packidx_cache[i - 1]);
829 		if (err)
830 			return err;
831 	}
832 
833 	/*
834 	 * Insert the new pack index at the front so it will
835 	 * be searched first in the future.
836 	 */
837 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
838 	    sizeof(repo->packidx_cache) -
839 	    sizeof(repo->packidx_cache[0]));
840 	repo->packidx_cache[0] = packidx;
841 
842 	return NULL;
843 }
844 
845 static int
846 is_packidx_filename(const char *name, size_t len)
847 {
848 	if (len != GOT_PACKIDX_NAMELEN)
849 		return 0;
850 
851 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
852 		return 0;
853 
854 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
855 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
856 		return 0;
857 
858 	return 1;
859 }
860 
861 const struct got_error *
862 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
863     struct got_repository *repo, struct got_object_id *id)
864 {
865 	const struct got_error *err;
866 	char *path_packdir;
867 	DIR *packdir;
868 	struct dirent *dent;
869 	char *path_packidx;
870 	int i;
871 
872 	/* Search pack index cache. */
873 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
874 		if (repo->packidx_cache[i] == NULL)
875 			break;
876 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
877 		if (*idx != -1) {
878 			*packidx = repo->packidx_cache[i];
879 			/*
880 			 * Move this cache entry to the front. Repeatedly
881 			 * searching a wrong pack index can be expensive.
882 			 */
883 			if (i > 0) {
884 				struct got_packidx *p;
885 				p = repo->packidx_cache[0];
886 				repo->packidx_cache[0] = *packidx;
887 				repo->packidx_cache[i] = p;
888 			}
889 			return NULL;
890 		}
891 	}
892 	/* No luck. Search the filesystem. */
893 
894 	path_packdir = got_repo_get_path_objects_pack(repo);
895 	if (path_packdir == NULL)
896 		return got_error_from_errno("got_repo_get_path_objects_pack");
897 
898 	packdir = opendir(path_packdir);
899 	if (packdir == NULL) {
900 		if (errno == ENOENT)
901 			err = got_error_no_obj(id);
902 		else
903 			err = got_error_from_errno2("opendir", path_packdir);
904 		goto done;
905 	}
906 
907 	while ((dent = readdir(packdir)) != NULL) {
908 		int is_cached = 0;
909 
910 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
911 			continue;
912 
913 		if (asprintf(&path_packidx, "%s/%s", path_packdir,
914 		    dent->d_name) == -1) {
915 			err = got_error_from_errno("asprintf");
916 			goto done;
917 		}
918 
919 		for (i = 0; i < nitems(repo->packidx_cache); i++) {
920 			if (repo->packidx_cache[i] == NULL)
921 				break;
922 			if (strcmp(repo->packidx_cache[i]->path_packidx,
923 			    path_packidx) == 0) {
924 				is_cached = 1;
925 				break;
926 			}
927 		}
928 		if (is_cached) {
929 			free(path_packidx);
930 			continue; /* already searched */
931 		}
932 
933 		err = got_packidx_open(packidx, path_packidx, 0);
934 		if (err) {
935 			free(path_packidx);
936 			goto done;
937 		}
938 
939 		err = cache_packidx(repo, *packidx, path_packidx);
940 		free(path_packidx);
941 		if (err)
942 			goto done;
943 
944 		*idx = got_packidx_get_object_idx(*packidx, id);
945 		if (*idx != -1) {
946 			err = NULL; /* found the object */
947 			goto done;
948 		}
949 	}
950 
951 	err = got_error_no_obj(id);
952 done:
953 	free(path_packdir);
954 	if (packdir && closedir(packdir) != 0 && err == NULL)
955 		err = got_error_from_errno("closedir");
956 	return err;
957 }
958 
959 static const struct got_error *
960 read_packfile_hdr(int fd, struct got_packidx *packidx)
961 {
962 	const struct got_error *err = NULL;
963 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
964 	struct got_packfile_hdr hdr;
965 	ssize_t n;
966 
967 	n = read(fd, &hdr, sizeof(hdr));
968 	if (n < 0)
969 		return got_error_from_errno("read");
970 	if (n != sizeof(hdr))
971 		return got_error(GOT_ERR_BAD_PACKFILE);
972 
973 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
974 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
975 	    be32toh(hdr.nobjects) != totobj)
976 		err = got_error(GOT_ERR_BAD_PACKFILE);
977 
978 	return err;
979 }
980 
981 static const struct got_error *
982 open_packfile(int *fd, const char *path_packfile, struct got_packidx *packidx)
983 {
984 	const struct got_error *err = NULL;
985 
986 	*fd = open(path_packfile, O_RDONLY | O_NOFOLLOW);
987 	if (*fd == -1)
988 		return got_error_from_errno2("open", path_packfile);
989 
990 	if (packidx) {
991 		err = read_packfile_hdr(*fd, packidx);
992 		if (err) {
993 			close(*fd);
994 			*fd = -1;
995 		}
996 	}
997 
998 	return err;
999 }
1000 
1001 const struct got_error *
1002 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1003     const char *path_packfile, struct got_packidx *packidx)
1004 {
1005 	const struct got_error *err = NULL;
1006 	struct got_pack *pack = NULL;
1007 	struct stat sb;
1008 	int i;
1009 
1010 	if (packp)
1011 		*packp = NULL;
1012 
1013 	for (i = 0; i < nitems(repo->packs); i++) {
1014 		pack = &repo->packs[i];
1015 		if (pack->path_packfile == NULL)
1016 			break;
1017 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1018 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1019 	}
1020 
1021 	if (i == nitems(repo->packs) - 1) {
1022 		err = got_pack_close(&repo->packs[i - 1]);
1023 		if (err)
1024 			return err;
1025 		memmove(&repo->packs[1], &repo->packs[0],
1026 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1027 		i = 0;
1028 	}
1029 
1030 	pack = &repo->packs[i];
1031 
1032 	pack->path_packfile = strdup(path_packfile);
1033 	if (pack->path_packfile == NULL) {
1034 		err = got_error_from_errno("strdup");
1035 		goto done;
1036 	}
1037 
1038 	err = open_packfile(&pack->fd, path_packfile, packidx);
1039 	if (err)
1040 		goto done;
1041 
1042 	if (fstat(pack->fd, &sb) != 0) {
1043 		err = got_error_from_errno("fstat");
1044 		goto done;
1045 	}
1046 	pack->filesize = sb.st_size;
1047 
1048 	pack->privsep_child = NULL;
1049 
1050 #ifndef GOT_PACK_NO_MMAP
1051 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1052 	    pack->fd, 0);
1053 	if (pack->map == MAP_FAILED) {
1054 		if (errno != ENOMEM) {
1055 			err = got_error_from_errno("mmap");
1056 			goto done;
1057 		}
1058 		pack->map = NULL; /* fall back to read(2) */
1059 	}
1060 #endif
1061 done:
1062 	if (err) {
1063 		if (pack) {
1064 			free(pack->path_packfile);
1065 			memset(pack, 0, sizeof(*pack));
1066 		}
1067 	} else if (packp)
1068 		*packp = pack;
1069 	return err;
1070 }
1071 
1072 struct got_pack *
1073 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1074 {
1075 	struct got_pack *pack = NULL;
1076 	int i;
1077 
1078 	for (i = 0; i < nitems(repo->packs); i++) {
1079 		pack = &repo->packs[i];
1080 		if (pack->path_packfile == NULL)
1081 			break;
1082 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1083 			return pack;
1084 	}
1085 
1086 	return NULL;
1087 }
1088 
1089 const struct got_error *
1090 got_repo_init(const char *repo_path)
1091 {
1092 	const struct got_error *err = NULL;
1093 	const char *dirnames[] = {
1094 		GOT_OBJECTS_DIR,
1095 		GOT_OBJECTS_PACK_DIR,
1096 		GOT_REFS_DIR,
1097 	};
1098 	const char *description_str = "Unnamed repository; "
1099 	    "edit this file 'description' to name the repository.";
1100 	const char *headref_str = "ref: refs/heads/main";
1101 	const char *gitconfig_str = "[core]\n"
1102 	    "\trepositoryformatversion = 0\n"
1103 	    "\tfilemode = true\n"
1104 	    "\tbare = true\n";
1105 	char *path;
1106 	int i;
1107 
1108 	if (!got_path_dir_is_empty(repo_path))
1109 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1110 
1111 	for (i = 0; i < nitems(dirnames); i++) {
1112 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1113 			return got_error_from_errno("asprintf");
1114 		}
1115 		err = got_path_mkdir(path);
1116 		free(path);
1117 		if (err)
1118 			return err;
1119 	}
1120 
1121 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1122 		return got_error_from_errno("asprintf");
1123 	err = got_path_create_file(path, description_str);
1124 	free(path);
1125 	if (err)
1126 		return err;
1127 
1128 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1129 		return got_error_from_errno("asprintf");
1130 	err = got_path_create_file(path, headref_str);
1131 	free(path);
1132 	if (err)
1133 		return err;
1134 
1135 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1136 		return got_error_from_errno("asprintf");
1137 	err = got_path_create_file(path, gitconfig_str);
1138 	free(path);
1139 	if (err)
1140 		return err;
1141 
1142 	return NULL;
1143 }
1144 
1145 static const struct got_error *
1146 match_packed_object(struct got_object_id **unique_id,
1147     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1148 {
1149 	const struct got_error *err = NULL;
1150 	char *path_packdir;
1151 	DIR *packdir;
1152 	struct dirent *dent;
1153 	char *path_packidx;
1154 	struct got_object_id_queue matched_ids;
1155 
1156 	SIMPLEQ_INIT(&matched_ids);
1157 
1158 	path_packdir = got_repo_get_path_objects_pack(repo);
1159 	if (path_packdir == NULL)
1160 		return got_error_from_errno("got_repo_get_path_objects_pack");
1161 
1162 	packdir = opendir(path_packdir);
1163 	if (packdir == NULL) {
1164 		if (errno != ENOENT)
1165 			err = got_error_from_errno2("opendir", path_packdir);
1166 		goto done;
1167 	}
1168 
1169 	while ((dent = readdir(packdir)) != NULL) {
1170 		struct got_packidx *packidx;
1171 		struct got_object_qid *qid;
1172 
1173 
1174 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1175 			continue;
1176 
1177 		if (asprintf(&path_packidx, "%s/%s", path_packdir,
1178 		    dent->d_name) == -1) {
1179 			err = got_error_from_errno("asprintf");
1180 			break;
1181 		}
1182 
1183 		err = got_packidx_open(&packidx, path_packidx, 0);
1184 		free(path_packidx);
1185 		if (err)
1186 			break;
1187 
1188 		err = got_packidx_match_id_str_prefix(&matched_ids,
1189 		    packidx, id_str_prefix);
1190 		if (err) {
1191 			got_packidx_close(packidx);
1192 			break;
1193 		}
1194 		err = got_packidx_close(packidx);
1195 		if (err)
1196 			break;
1197 
1198 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1199 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1200 				int matched_type;
1201 				err = got_object_get_type(&matched_type, repo,
1202 				    qid->id);
1203 				if (err)
1204 					goto done;
1205 				if (matched_type != obj_type)
1206 					continue;
1207 			}
1208 			if (*unique_id == NULL) {
1209 				*unique_id = got_object_id_dup(qid->id);
1210 				if (*unique_id == NULL) {
1211 					err = got_error_from_errno("malloc");
1212 					goto done;
1213 				}
1214 			} else {
1215 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1216 					continue; /* packed multiple times */
1217 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1218 				goto done;
1219 			}
1220 		}
1221 	}
1222 done:
1223 	got_object_id_queue_free(&matched_ids);
1224 	free(path_packdir);
1225 	if (packdir && closedir(packdir) != 0 && err == NULL)
1226 		err = got_error_from_errno("closedir");
1227 	if (err) {
1228 		free(*unique_id);
1229 		*unique_id = NULL;
1230 	}
1231 	return err;
1232 }
1233 
1234 static const struct got_error *
1235 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1236     const char *object_dir, const char *id_str_prefix, int obj_type,
1237     struct got_repository *repo)
1238 {
1239 	const struct got_error *err = NULL;
1240 	char *path;
1241 	DIR *dir = NULL;
1242 	struct dirent *dent;
1243 	struct got_object_id id;
1244 
1245 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1246 		err = got_error_from_errno("asprintf");
1247 		goto done;
1248 	}
1249 
1250 	dir = opendir(path);
1251 	if (dir == NULL) {
1252 		if (errno == ENOENT) {
1253 			err = NULL;
1254 			goto done;
1255 		}
1256 		err = got_error_from_errno2("opendir", path);
1257 		goto done;
1258 	}
1259 	while ((dent = readdir(dir)) != NULL) {
1260 		char *id_str;
1261 		int cmp;
1262 
1263 		if (strcmp(dent->d_name, ".") == 0 ||
1264 		    strcmp(dent->d_name, "..") == 0)
1265 			continue;
1266 
1267 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1268 			err = got_error_from_errno("asprintf");
1269 			goto done;
1270 		}
1271 
1272 		if (!got_parse_sha1_digest(id.sha1, id_str))
1273 			continue;
1274 
1275 		/*
1276 		 * Directory entries do not necessarily appear in
1277 		 * sorted order, so we must iterate over all of them.
1278 		 */
1279 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1280 		if (cmp != 0) {
1281 			free(id_str);
1282 			continue;
1283 		}
1284 
1285 		if (*unique_id == NULL) {
1286 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1287 				int matched_type;
1288 				err = got_object_get_type(&matched_type, repo,
1289 				    &id);
1290 				if (err)
1291 					goto done;
1292 				if (matched_type != obj_type)
1293 					continue;
1294 			}
1295 			*unique_id = got_object_id_dup(&id);
1296 			if (*unique_id == NULL) {
1297 				err = got_error_from_errno("got_object_id_dup");
1298 				free(id_str);
1299 				goto done;
1300 			}
1301 		} else {
1302 			if (got_object_id_cmp(*unique_id, &id) == 0)
1303 				continue; /* both packed and loose */
1304 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1305 			free(id_str);
1306 			goto done;
1307 		}
1308 	}
1309 done:
1310 	if (dir && closedir(dir) != 0 && err == NULL)
1311 		err = got_error_from_errno("closedir");
1312 	if (err) {
1313 		free(*unique_id);
1314 		*unique_id = NULL;
1315 	}
1316 	free(path);
1317 	return err;
1318 }
1319 
1320 const struct got_error *
1321 got_repo_match_object_id_prefix(struct got_object_id **id,
1322     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1323 {
1324 	const struct got_error *err = NULL;
1325 	char *path_objects = got_repo_get_path_objects(repo);
1326 	char *object_dir = NULL;
1327 	size_t len;
1328 	int i;
1329 
1330 	*id = NULL;
1331 
1332 	for (i = 0; i < strlen(id_str_prefix); i++) {
1333 		if (isxdigit((unsigned char)id_str_prefix[i]))
1334 			continue;
1335 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1336 	}
1337 
1338 	len = strlen(id_str_prefix);
1339 	if (len >= 2) {
1340 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1341 		if (err)
1342 			goto done;
1343 		object_dir = strndup(id_str_prefix, 2);
1344 		if (object_dir == NULL) {
1345 			err = got_error_from_errno("strdup");
1346 			goto done;
1347 		}
1348 		err = match_loose_object(id, path_objects, object_dir,
1349 		    id_str_prefix, obj_type, repo);
1350 	} else if (len == 1) {
1351 		int i;
1352 		for (i = 0; i < 0xf; i++) {
1353 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1354 			    == -1) {
1355 				err = got_error_from_errno("asprintf");
1356 				goto done;
1357 			}
1358 			err = match_packed_object(id, repo, object_dir,
1359 			    obj_type);
1360 			if (err)
1361 				goto done;
1362 			err = match_loose_object(id, path_objects, object_dir,
1363 			    id_str_prefix, obj_type, repo);
1364 			if (err)
1365 				goto done;
1366 		}
1367 	} else {
1368 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1369 		goto done;
1370 	}
1371 done:
1372 	free(object_dir);
1373 	if (err) {
1374 		free(*id);
1375 		*id = NULL;
1376 	} else if (*id == NULL)
1377 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1378 
1379 	return err;
1380 }
1381 
1382 const struct got_error *
1383 got_repo_match_object_id(struct got_object_id **id, char **label,
1384     const char *id_str, int obj_type, int resolve_tags,
1385     struct got_repository *repo)
1386 {
1387 	const struct got_error *err;
1388 	struct got_tag_object *tag;
1389 	struct got_reference *ref = NULL;
1390 
1391 	*id = NULL;
1392 	if (label)
1393 		*label = NULL;
1394 
1395 	if (resolve_tags) {
1396 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1397 		    repo);
1398 		if (err == NULL) {
1399 			*id = got_object_id_dup(
1400 			    got_object_tag_get_object_id(tag));
1401 			if (*id == NULL)
1402 				err = got_error_from_errno("got_object_id_dup");
1403 			else if (label && asprintf(label, "refs/tags/%s",
1404 			    got_object_tag_get_name(tag)) == -1) {
1405 				err = got_error_from_errno("asprintf");
1406 				free(*id);
1407 				*id = NULL;
1408 			}
1409 			got_object_tag_close(tag);
1410 			return err;
1411 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1412 		    err->code != GOT_ERR_NO_OBJ)
1413 			return err;
1414 	}
1415 
1416 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1417 	if (err) {
1418 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1419 			return err;
1420 		err = got_ref_open(&ref, repo, id_str, 0);
1421 		if (err != NULL)
1422 			goto done;
1423 		if (label) {
1424 			*label = strdup(got_ref_get_name(ref));
1425 			if (*label == NULL) {
1426 				err = got_error_from_errno("strdup");
1427 				goto done;
1428 			}
1429 		}
1430 		err = got_ref_resolve(id, repo, ref);
1431 	} else if (label) {
1432 		err = got_object_id_str(label, *id);
1433 		if (*label == NULL) {
1434 			err = got_error_from_errno("strdup");
1435 			goto done;
1436 		}
1437 	}
1438 done:
1439 	if (ref)
1440 		got_ref_close(ref);
1441 	return err;
1442 }
1443 
1444 const struct got_error *
1445 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1446     int obj_type, struct got_repository *repo)
1447 {
1448 	const struct got_error *err;
1449 	struct got_reflist_head refs;
1450 	struct got_reflist_entry *re;
1451 	struct got_object_id *tag_id;
1452 
1453 	SIMPLEQ_INIT(&refs);
1454 	*tag = NULL;
1455 
1456 	err = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_by_name, NULL);
1457 	if (err)
1458 		return err;
1459 
1460 	SIMPLEQ_FOREACH(re, &refs, entry) {
1461 		const char *refname;
1462 		refname = got_ref_get_name(re->ref);
1463 		if (got_ref_is_symbolic(re->ref))
1464 			continue;
1465 		refname += strlen("refs/tags/");
1466 		if (strcmp(refname, name) != 0)
1467 			continue;
1468 		err = got_ref_resolve(&tag_id, repo, re->ref);
1469 		if (err)
1470 			break;
1471 		err = got_object_open_as_tag(tag, repo, tag_id);
1472 		free(tag_id);
1473 		if (err)
1474 			break;
1475 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1476 		    got_object_tag_get_object_type(*tag) == obj_type)
1477 			break;
1478 		got_object_tag_close(*tag);
1479 		*tag = NULL;
1480 	}
1481 
1482 	got_ref_list_free(&refs);
1483 	if (err == NULL && *tag == NULL)
1484 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1485 	return err;
1486 }
1487 
1488 static const struct got_error *
1489 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1490     const char *name, mode_t mode, struct got_object_id *blob_id)
1491 {
1492 	const struct got_error *err = NULL;
1493 
1494 	 *new_te = NULL;
1495 
1496 	*new_te = calloc(1, sizeof(**new_te));
1497 	if (*new_te == NULL)
1498 		return got_error_from_errno("calloc");
1499 
1500 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1501 	    sizeof((*new_te)->name)) {
1502 		err = got_error(GOT_ERR_NO_SPACE);
1503 		goto done;
1504 	}
1505 
1506 	if (S_ISLNK(mode)) {
1507 		(*new_te)->mode = S_IFLNK;
1508 	} else {
1509 		(*new_te)->mode = S_IFREG;
1510 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1511 	}
1512 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1513 done:
1514 	if (err && *new_te) {
1515 		free(*new_te);
1516 		*new_te = NULL;
1517 	}
1518 	return err;
1519 }
1520 
1521 static const struct got_error *
1522 import_file(struct got_tree_entry **new_te, struct dirent *de,
1523     const char *path, struct got_repository *repo)
1524 {
1525 	const struct got_error *err;
1526 	struct got_object_id *blob_id = NULL;
1527 	char *filepath;
1528 	struct stat sb;
1529 
1530 	if (asprintf(&filepath, "%s%s%s", path,
1531 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1532 		return got_error_from_errno("asprintf");
1533 
1534 	if (lstat(filepath, &sb) != 0) {
1535 		err = got_error_from_errno2("lstat", path);
1536 		goto done;
1537 	}
1538 
1539 	err = got_object_blob_create(&blob_id, filepath, repo);
1540 	if (err)
1541 		goto done;
1542 
1543 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1544 	    blob_id);
1545 done:
1546 	free(filepath);
1547 	if (err)
1548 		free(blob_id);
1549 	return err;
1550 }
1551 
1552 static const struct got_error *
1553 insert_tree_entry(struct got_tree_entry *new_te,
1554     struct got_pathlist_head *paths)
1555 {
1556 	const struct got_error *err = NULL;
1557 	struct got_pathlist_entry *new_pe;
1558 
1559 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1560 	if (err)
1561 		return err;
1562 	if (new_pe == NULL)
1563 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1564 	return NULL;
1565 }
1566 
1567 static const struct got_error *write_tree(struct got_object_id **,
1568     const char *, struct got_pathlist_head *, struct got_repository *,
1569     got_repo_import_cb progress_cb, void *progress_arg);
1570 
1571 static const struct got_error *
1572 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1573     const char *path, struct got_pathlist_head *ignores,
1574     struct got_repository *repo,
1575     got_repo_import_cb progress_cb, void *progress_arg)
1576 {
1577 	const struct got_error *err;
1578 	struct got_object_id *id = NULL;
1579 	char *subdirpath;
1580 
1581 	if (asprintf(&subdirpath, "%s%s%s", path,
1582 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1583 		return got_error_from_errno("asprintf");
1584 
1585 	(*new_te) = calloc(1, sizeof(**new_te));
1586 	if (*new_te == NULL)
1587 		return got_error_from_errno("calloc");
1588 	(*new_te)->mode = S_IFDIR;
1589 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1590 	    sizeof((*new_te)->name)) {
1591 		err = got_error(GOT_ERR_NO_SPACE);
1592 		goto done;
1593 	}
1594 	err = write_tree(&id, subdirpath, ignores,  repo,
1595 	    progress_cb, progress_arg);
1596 	if (err)
1597 		goto done;
1598 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1599 	
1600 done:
1601 	free(id);
1602 	free(subdirpath);
1603 	if (err) {
1604 		free(*new_te);
1605 		*new_te = NULL;
1606 	}
1607 	return err;
1608 }
1609 
1610 static const struct got_error *
1611 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1612     struct got_pathlist_head *ignores, struct got_repository *repo,
1613     got_repo_import_cb progress_cb, void *progress_arg)
1614 {
1615 	const struct got_error *err = NULL;
1616 	DIR *dir;
1617 	struct dirent *de;
1618 	int nentries;
1619 	struct got_tree_entry *new_te = NULL;
1620 	struct got_pathlist_head paths;
1621 	struct got_pathlist_entry *pe;
1622 
1623 	*new_tree_id = NULL;
1624 
1625 	TAILQ_INIT(&paths);
1626 
1627 	dir = opendir(path_dir);
1628 	if (dir == NULL) {
1629 		err = got_error_from_errno2("opendir", path_dir);
1630 		goto done;
1631 	}
1632 
1633 	nentries = 0;
1634 	while ((de = readdir(dir)) != NULL) {
1635 		int ignore = 0;
1636 		int type;
1637 
1638 		if (strcmp(de->d_name, ".") == 0 ||
1639 		    strcmp(de->d_name, "..") == 0)
1640 			continue;
1641 
1642 		TAILQ_FOREACH(pe, ignores, entry) {
1643 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1644 				ignore = 1;
1645 				break;
1646 			}
1647 		}
1648 		if (ignore)
1649 			continue;
1650 
1651 		err = got_path_dirent_type(&type, path_dir, de);
1652 		if (err)
1653 			goto done;
1654 
1655 		if (type == DT_DIR) {
1656 			err = import_subdir(&new_te, de, path_dir,
1657 			    ignores, repo, progress_cb, progress_arg);
1658 			if (err) {
1659 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1660 					goto done;
1661 				err = NULL;
1662 				continue;
1663 			}
1664 		} else if (type == DT_REG || type == DT_LNK) {
1665 			err = import_file(&new_te, de, path_dir, repo);
1666 			if (err)
1667 				goto done;
1668 		} else
1669 			continue;
1670 
1671 		err = insert_tree_entry(new_te, &paths);
1672 		if (err)
1673 			goto done;
1674 		nentries++;
1675 	}
1676 
1677 	if (TAILQ_EMPTY(&paths)) {
1678 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1679 		    "cannot create tree without any entries");
1680 		goto done;
1681 	}
1682 
1683 	TAILQ_FOREACH(pe, &paths, entry) {
1684 		struct got_tree_entry *te = pe->data;
1685 		char *path;
1686 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1687 			continue;
1688 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1689 			err = got_error_from_errno("asprintf");
1690 			goto done;
1691 		}
1692 		err = (*progress_cb)(progress_arg, path);
1693 		free(path);
1694 		if (err)
1695 			goto done;
1696 	}
1697 
1698 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1699 done:
1700 	if (dir)
1701 		closedir(dir);
1702 	got_pathlist_free(&paths);
1703 	return err;
1704 }
1705 
1706 const struct got_error *
1707 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1708     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1709     struct got_repository *repo, got_repo_import_cb progress_cb,
1710     void *progress_arg)
1711 {
1712 	const struct got_error *err;
1713 	struct got_object_id *new_tree_id;
1714 
1715 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1716 	    progress_cb, progress_arg);
1717 	if (err)
1718 		return err;
1719 
1720 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1721 	    author, time(NULL), author, time(NULL), logmsg, repo);
1722 	free(new_tree_id);
1723 	return err;
1724 }