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Merge branch 'pr/3957'
[libgit2.git] / src / repository.c
1 /*
2 * Copyright (C) the libgit2 contributors. All rights reserved.
3 *
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
6 */
7 #include <ctype.h>
8
9 #include "git2/object.h"
10 #include "git2/refdb.h"
11 #include "git2/sys/repository.h"
12
13 #include "common.h"
14 #include "repository.h"
15 #include "commit.h"
16 #include "tag.h"
17 #include "blob.h"
18 #include "fileops.h"
19 #include "sysdir.h"
20 #include "filebuf.h"
21 #include "index.h"
22 #include "config.h"
23 #include "refs.h"
24 #include "filter.h"
25 #include "odb.h"
26 #include "remote.h"
27 #include "merge.h"
28 #include "diff_driver.h"
29 #include "annotated_commit.h"
30 #include "submodule.h"
31 #include "worktree.h"
32
33 #include "strmap.h"
34
35 #ifdef GIT_WIN32
36 # include "win32/w32_util.h"
37 #endif
38
39 static const struct {
40 git_repository_item_t parent;
41 const char *name;
42 bool directory;
43 } items[] = {
44 { GIT_REPOSITORY_ITEM_GITDIR, NULL, true },
45 { GIT_REPOSITORY_ITEM_WORKDIR, NULL, true },
46 { GIT_REPOSITORY_ITEM_COMMONDIR, NULL, true },
47 { GIT_REPOSITORY_ITEM_GITDIR, "index", false },
48 { GIT_REPOSITORY_ITEM_COMMONDIR, "objects", true },
49 { GIT_REPOSITORY_ITEM_COMMONDIR, "refs", true },
50 { GIT_REPOSITORY_ITEM_COMMONDIR, "packed-refs", false },
51 { GIT_REPOSITORY_ITEM_COMMONDIR, "remotes", true },
52 { GIT_REPOSITORY_ITEM_COMMONDIR, "config", false },
53 { GIT_REPOSITORY_ITEM_COMMONDIR, "info", true },
54 { GIT_REPOSITORY_ITEM_COMMONDIR, "hooks", true },
55 { GIT_REPOSITORY_ITEM_COMMONDIR, "logs", true },
56 { GIT_REPOSITORY_ITEM_GITDIR, "modules", true },
57 { GIT_REPOSITORY_ITEM_COMMONDIR, "worktrees", true }
58 };
59
60 static int check_repositoryformatversion(git_config *config);
61
62 #define GIT_COMMONDIR_FILE "commondir"
63 #define GIT_GITDIR_FILE "gitdir"
64
65 #define GIT_FILE_CONTENT_PREFIX "gitdir:"
66
67 #define GIT_BRANCH_MASTER "master"
68
69 #define GIT_REPO_VERSION 0
70
71 git_buf git_repository__reserved_names_win32[] = {
72 { DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
73 { GIT_DIR_SHORTNAME, 0, CONST_STRLEN(GIT_DIR_SHORTNAME) }
74 };
75 size_t git_repository__reserved_names_win32_len = 2;
76
77 git_buf git_repository__reserved_names_posix[] = {
78 { DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
79 };
80 size_t git_repository__reserved_names_posix_len = 1;
81
82 static void set_odb(git_repository *repo, git_odb *odb)
83 {
84 if (odb) {
85 GIT_REFCOUNT_OWN(odb, repo);
86 GIT_REFCOUNT_INC(odb);
87 }
88
89 if ((odb = git__swap(repo->_odb, odb)) != NULL) {
90 GIT_REFCOUNT_OWN(odb, NULL);
91 git_odb_free(odb);
92 }
93 }
94
95 static void set_refdb(git_repository *repo, git_refdb *refdb)
96 {
97 if (refdb) {
98 GIT_REFCOUNT_OWN(refdb, repo);
99 GIT_REFCOUNT_INC(refdb);
100 }
101
102 if ((refdb = git__swap(repo->_refdb, refdb)) != NULL) {
103 GIT_REFCOUNT_OWN(refdb, NULL);
104 git_refdb_free(refdb);
105 }
106 }
107
108 static void set_config(git_repository *repo, git_config *config)
109 {
110 if (config) {
111 GIT_REFCOUNT_OWN(config, repo);
112 GIT_REFCOUNT_INC(config);
113 }
114
115 if ((config = git__swap(repo->_config, config)) != NULL) {
116 GIT_REFCOUNT_OWN(config, NULL);
117 git_config_free(config);
118 }
119
120 git_repository__cvar_cache_clear(repo);
121 }
122
123 static void set_index(git_repository *repo, git_index *index)
124 {
125 if (index) {
126 GIT_REFCOUNT_OWN(index, repo);
127 GIT_REFCOUNT_INC(index);
128 }
129
130 if ((index = git__swap(repo->_index, index)) != NULL) {
131 GIT_REFCOUNT_OWN(index, NULL);
132 git_index_free(index);
133 }
134 }
135
136 void git_repository__cleanup(git_repository *repo)
137 {
138 assert(repo);
139
140 git_repository_submodule_cache_clear(repo);
141 git_cache_clear(&repo->objects);
142 git_attr_cache_flush(repo);
143
144 set_config(repo, NULL);
145 set_index(repo, NULL);
146 set_odb(repo, NULL);
147 set_refdb(repo, NULL);
148 }
149
150 void git_repository_free(git_repository *repo)
151 {
152 size_t i;
153
154 if (repo == NULL)
155 return;
156
157 git_repository__cleanup(repo);
158
159 git_cache_free(&repo->objects);
160
161 git_diff_driver_registry_free(repo->diff_drivers);
162 repo->diff_drivers = NULL;
163
164 for (i = 0; i < repo->reserved_names.size; i++)
165 git_buf_free(git_array_get(repo->reserved_names, i));
166 git_array_clear(repo->reserved_names);
167
168 git__free(repo->gitlink);
169 git__free(repo->gitdir);
170 git__free(repo->commondir);
171 git__free(repo->workdir);
172 git__free(repo->namespace);
173 git__free(repo->ident_name);
174 git__free(repo->ident_email);
175
176 git__memzero(repo, sizeof(*repo));
177 git__free(repo);
178 }
179
180 /*
181 * Git repository open methods
182 *
183 * Open a repository object from its path
184 */
185 static bool valid_repository_path(git_buf *repository_path, git_buf *common_path)
186 {
187 /* Check if we have a separate commondir (e.g. we have a
188 * worktree) */
189 if (git_path_contains_file(repository_path, GIT_COMMONDIR_FILE)) {
190 git_buf common_link = GIT_BUF_INIT;
191 git_buf_joinpath(&common_link, repository_path->ptr, GIT_COMMONDIR_FILE);
192
193 git_futils_readbuffer(&common_link, common_link.ptr);
194 git_buf_rtrim(&common_link);
195
196 if (git_path_is_relative(common_link.ptr)) {
197 git_buf_joinpath(common_path, repository_path->ptr, common_link.ptr);
198 } else {
199 git_buf_swap(common_path, &common_link);
200 }
201
202 git_buf_free(&common_link);
203 }
204 else {
205 git_buf_set(common_path, repository_path->ptr, repository_path->size);
206 }
207
208 /* Make sure the commondir path always has a trailing * slash */
209 if (git_buf_rfind(common_path, '/') != (ssize_t)common_path->size - 1)
210 git_buf_putc(common_path, '/');
211
212 /* Ensure HEAD file exists */
213 if (git_path_contains_file(repository_path, GIT_HEAD_FILE) == false)
214 return false;
215
216 /* Check files in common dir */
217 if (git_path_contains_dir(common_path, GIT_OBJECTS_DIR) == false)
218 return false;
219 if (git_path_contains_dir(common_path, GIT_REFS_DIR) == false)
220 return false;
221
222 return true;
223 }
224
225 static git_repository *repository_alloc(void)
226 {
227 git_repository *repo = git__calloc(1, sizeof(git_repository));
228
229 if (repo == NULL ||
230 git_cache_init(&repo->objects) < 0)
231 goto on_error;
232
233 git_array_init_to_size(repo->reserved_names, 4);
234 if (!repo->reserved_names.ptr)
235 goto on_error;
236
237 /* set all the entries in the cvar cache to `unset` */
238 git_repository__cvar_cache_clear(repo);
239
240 return repo;
241
242 on_error:
243 if (repo)
244 git_cache_free(&repo->objects);
245
246 git__free(repo);
247 return NULL;
248 }
249
250 int git_repository_new(git_repository **out)
251 {
252 git_repository *repo;
253
254 *out = repo = repository_alloc();
255 GITERR_CHECK_ALLOC(repo);
256
257 repo->is_bare = 1;
258 repo->is_worktree = 0;
259
260 return 0;
261 }
262
263 static int load_config_data(git_repository *repo, const git_config *config)
264 {
265 int is_bare;
266
267 /* Try to figure out if it's bare, default to non-bare if it's not set */
268 if (git_config_get_bool(&is_bare, config, "core.bare") < 0)
269 repo->is_bare = 0;
270 else
271 repo->is_bare = is_bare;
272
273 return 0;
274 }
275
276 static int load_workdir(git_repository *repo, git_config *config, git_buf *parent_path)
277 {
278 int error;
279 git_config_entry *ce;
280 git_buf worktree = GIT_BUF_INIT;
281 git_buf path = GIT_BUF_INIT;
282
283 if (repo->is_bare)
284 return 0;
285
286 if ((error = git_config__lookup_entry(
287 &ce, config, "core.worktree", false)) < 0)
288 return error;
289
290 if (repo->is_worktree) {
291 char *gitlink = git_worktree__read_link(repo->gitdir, GIT_GITDIR_FILE);
292 if (!gitlink) {
293 error = -1;
294 goto cleanup;
295 }
296
297 git_buf_attach(&worktree, gitlink, 0);
298
299 if ((git_path_dirname_r(&worktree, worktree.ptr)) < 0 ||
300 git_path_to_dir(&worktree) < 0) {
301 error = -1;
302 goto cleanup;
303 }
304
305 repo->workdir = git_buf_detach(&worktree);
306 }
307 else if (ce && ce->value) {
308 if ((error = git_path_prettify_dir(
309 &worktree, ce->value, repo->gitdir)) < 0)
310 goto cleanup;
311
312 repo->workdir = git_buf_detach(&worktree);
313 }
314 else if (parent_path && git_path_isdir(parent_path->ptr))
315 repo->workdir = git_buf_detach(parent_path);
316 else {
317 if (git_path_dirname_r(&worktree, repo->gitdir) < 0 ||
318 git_path_to_dir(&worktree) < 0) {
319 error = -1;
320 goto cleanup;
321 }
322
323 repo->workdir = git_buf_detach(&worktree);
324 }
325
326 GITERR_CHECK_ALLOC(repo->workdir);
327 cleanup:
328 git_buf_free(&path);
329 git_config_entry_free(ce);
330 return error;
331 }
332
333 /*
334 * This function returns furthest offset into path where a ceiling dir
335 * is found, so we can stop processing the path at that point.
336 *
337 * Note: converting this to use git_bufs instead of GIT_PATH_MAX buffers on
338 * the stack could remove directories name limits, but at the cost of doing
339 * repeated malloc/frees inside the loop below, so let's not do it now.
340 */
341 static size_t find_ceiling_dir_offset(
342 const char *path,
343 const char *ceiling_directories)
344 {
345 char buf[GIT_PATH_MAX + 1];
346 char buf2[GIT_PATH_MAX + 1];
347 const char *ceil, *sep;
348 size_t len, max_len = 0, min_len;
349
350 assert(path);
351
352 min_len = (size_t)(git_path_root(path) + 1);
353
354 if (ceiling_directories == NULL || min_len == 0)
355 return min_len;
356
357 for (sep = ceil = ceiling_directories; *sep; ceil = sep + 1) {
358 for (sep = ceil; *sep && *sep != GIT_PATH_LIST_SEPARATOR; sep++);
359 len = sep - ceil;
360
361 if (len == 0 || len >= sizeof(buf) || git_path_root(ceil) == -1)
362 continue;
363
364 strncpy(buf, ceil, len);
365 buf[len] = '\0';
366
367 if (p_realpath(buf, buf2) == NULL)
368 continue;
369
370 len = strlen(buf2);
371 if (len > 0 && buf2[len-1] == '/')
372 buf[--len] = '\0';
373
374 if (!strncmp(path, buf2, len) &&
375 (path[len] == '/' || !path[len]) &&
376 len > max_len)
377 {
378 max_len = len;
379 }
380 }
381
382 return (max_len <= min_len ? min_len : max_len);
383 }
384
385 /*
386 * Read the contents of `file_path` and set `path_out` to the repo dir that
387 * it points to. Before calling, set `path_out` to the base directory that
388 * should be used if the contents of `file_path` are a relative path.
389 */
390 static int read_gitfile(git_buf *path_out, const char *file_path)
391 {
392 int error = 0;
393 git_buf file = GIT_BUF_INIT;
394 size_t prefix_len = strlen(GIT_FILE_CONTENT_PREFIX);
395
396 assert(path_out && file_path);
397
398 if (git_futils_readbuffer(&file, file_path) < 0)
399 return -1;
400
401 git_buf_rtrim(&file);
402 /* apparently on Windows, some people use backslashes in paths */
403 git_path_mkposix(file.ptr);
404
405 if (git_buf_len(&file) <= prefix_len ||
406 memcmp(git_buf_cstr(&file), GIT_FILE_CONTENT_PREFIX, prefix_len) != 0)
407 {
408 giterr_set(GITERR_REPOSITORY,
409 "the `.git` file at '%s' is malformed", file_path);
410 error = -1;
411 }
412 else if ((error = git_path_dirname_r(path_out, file_path)) >= 0) {
413 const char *gitlink = git_buf_cstr(&file) + prefix_len;
414 while (*gitlink && git__isspace(*gitlink)) gitlink++;
415
416 error = git_path_prettify_dir(
417 path_out, gitlink, git_buf_cstr(path_out));
418 }
419
420 git_buf_free(&file);
421 return error;
422 }
423
424 static int find_repo(
425 git_buf *repo_path,
426 git_buf *parent_path,
427 git_buf *link_path,
428 git_buf *common_path,
429 const char *start_path,
430 uint32_t flags,
431 const char *ceiling_dirs)
432 {
433 int error;
434 git_buf path = GIT_BUF_INIT;
435 git_buf repo_link = GIT_BUF_INIT;
436 git_buf common_link = GIT_BUF_INIT;
437 struct stat st;
438 dev_t initial_device = 0;
439 int min_iterations;
440 bool in_dot_git;
441 size_t ceiling_offset = 0;
442
443 git_buf_free(repo_path);
444
445 error = git_path_prettify(&path, start_path, NULL);
446 if (error < 0)
447 return error;
448
449 /* in_dot_git toggles each loop:
450 * /a/b/c/.git, /a/b/c, /a/b/.git, /a/b, /a/.git, /a
451 * With GIT_REPOSITORY_OPEN_BARE or GIT_REPOSITORY_OPEN_NO_DOTGIT, we
452 * assume we started with /a/b/c.git and don't append .git the first
453 * time through.
454 * min_iterations indicates the number of iterations left before going
455 * further counts as a search. */
456 if (flags & (GIT_REPOSITORY_OPEN_BARE | GIT_REPOSITORY_OPEN_NO_DOTGIT)) {
457 in_dot_git = true;
458 min_iterations = 1;
459 } else {
460 in_dot_git = false;
461 min_iterations = 2;
462 }
463
464 for (;;) {
465 if (!(flags & GIT_REPOSITORY_OPEN_NO_DOTGIT)) {
466 if (!in_dot_git) {
467 error = git_buf_joinpath(&path, path.ptr, DOT_GIT);
468 if (error < 0)
469 break;
470 }
471 in_dot_git = !in_dot_git;
472 }
473
474 if (p_stat(path.ptr, &st) == 0) {
475 /* check that we have not crossed device boundaries */
476 if (initial_device == 0)
477 initial_device = st.st_dev;
478 else if (st.st_dev != initial_device &&
479 !(flags & GIT_REPOSITORY_OPEN_CROSS_FS))
480 break;
481
482 if (S_ISDIR(st.st_mode)) {
483 if (valid_repository_path(&path, &common_link)) {
484 git_path_to_dir(&path);
485 git_buf_set(repo_path, path.ptr, path.size);
486
487 if (link_path)
488 git_buf_attach(link_path,
489 git_worktree__read_link(path.ptr, GIT_GITDIR_FILE), 0);
490 if (common_path)
491 git_buf_swap(&common_link, common_path);
492
493 break;
494 }
495 }
496 else if (S_ISREG(st.st_mode) && git__suffixcmp(path.ptr, "/" DOT_GIT) == 0) {
497 error = read_gitfile(&repo_link, path.ptr);
498 if (error < 0)
499 break;
500 if (valid_repository_path(&repo_link, &common_link)) {
501 git_buf_swap(repo_path, &repo_link);
502
503 if (link_path)
504 error = git_buf_put(link_path, path.ptr, path.size);
505 if (common_path)
506 git_buf_swap(&common_link, common_path);
507 }
508 break;
509 }
510 }
511
512 /* Move up one directory. If we're in_dot_git, we'll search the
513 * parent itself next. If we're !in_dot_git, we'll search .git
514 * in the parent directory next (added at the top of the loop). */
515 if (git_path_dirname_r(&path, path.ptr) < 0) {
516 error = -1;
517 break;
518 }
519
520 /* Once we've checked the directory (and .git if applicable),
521 * find the ceiling for a search. */
522 if (min_iterations && (--min_iterations == 0))
523 ceiling_offset = find_ceiling_dir_offset(path.ptr, ceiling_dirs);
524
525 /* Check if we should stop searching here. */
526 if (min_iterations == 0
527 && (path.ptr[ceiling_offset] == 0
528 || (flags & GIT_REPOSITORY_OPEN_NO_SEARCH)))
529 break;
530 }
531
532 if (!error && parent_path && !(flags & GIT_REPOSITORY_OPEN_BARE)) {
533 if (!git_buf_len(repo_path))
534 git_buf_clear(parent_path);
535 else {
536 git_path_dirname_r(parent_path, path.ptr);
537 git_path_to_dir(parent_path);
538 }
539 if (git_buf_oom(parent_path))
540 return -1;
541 }
542
543 /* If we didn't find the repository, and we don't have any other error
544 * to report, report that. */
545 if (!git_buf_len(repo_path) && !error) {
546 giterr_set(GITERR_REPOSITORY,
547 "could not find repository from '%s'", start_path);
548 error = GIT_ENOTFOUND;
549 }
550
551 git_buf_free(&path);
552 git_buf_free(&repo_link);
553 git_buf_free(&common_link);
554 return error;
555 }
556
557 int git_repository_open_bare(
558 git_repository **repo_ptr,
559 const char *bare_path)
560 {
561 int error;
562 git_buf path = GIT_BUF_INIT, common_path = GIT_BUF_INIT;
563 git_repository *repo = NULL;
564
565 if ((error = git_path_prettify_dir(&path, bare_path, NULL)) < 0)
566 return error;
567
568 if (!valid_repository_path(&path, &common_path)) {
569 git_buf_free(&path);
570 git_buf_free(&common_path);
571 giterr_set(GITERR_REPOSITORY, "path is not a repository: %s", bare_path);
572 return GIT_ENOTFOUND;
573 }
574
575 repo = repository_alloc();
576 GITERR_CHECK_ALLOC(repo);
577
578 repo->gitdir = git_buf_detach(&path);
579 GITERR_CHECK_ALLOC(repo->gitdir);
580 repo->commondir = git_buf_detach(&common_path);
581 GITERR_CHECK_ALLOC(repo->commondir);
582
583 /* of course we're bare! */
584 repo->is_bare = 1;
585 repo->is_worktree = 0;
586 repo->workdir = NULL;
587
588 *repo_ptr = repo;
589 return 0;
590 }
591
592 static int _git_repository_open_ext_from_env(
593 git_repository **out,
594 const char *start_path)
595 {
596 git_repository *repo = NULL;
597 git_index *index = NULL;
598 git_odb *odb = NULL;
599 git_buf dir_buf = GIT_BUF_INIT;
600 git_buf ceiling_dirs_buf = GIT_BUF_INIT;
601 git_buf across_fs_buf = GIT_BUF_INIT;
602 git_buf index_file_buf = GIT_BUF_INIT;
603 git_buf namespace_buf = GIT_BUF_INIT;
604 git_buf object_dir_buf = GIT_BUF_INIT;
605 git_buf alts_buf = GIT_BUF_INIT;
606 git_buf work_tree_buf = GIT_BUF_INIT;
607 git_buf common_dir_buf = GIT_BUF_INIT;
608 const char *ceiling_dirs = NULL;
609 unsigned flags = 0;
610 int error;
611
612 if (!start_path) {
613 error = git__getenv(&dir_buf, "GIT_DIR");
614 if (error == GIT_ENOTFOUND) {
615 giterr_clear();
616 start_path = ".";
617 } else if (error < 0)
618 goto error;
619 else {
620 start_path = git_buf_cstr(&dir_buf);
621 flags |= GIT_REPOSITORY_OPEN_NO_SEARCH;
622 flags |= GIT_REPOSITORY_OPEN_NO_DOTGIT;
623 }
624 }
625
626 error = git__getenv(&ceiling_dirs_buf, "GIT_CEILING_DIRECTORIES");
627 if (error == GIT_ENOTFOUND)
628 giterr_clear();
629 else if (error < 0)
630 goto error;
631 else
632 ceiling_dirs = git_buf_cstr(&ceiling_dirs_buf);
633
634 error = git__getenv(&across_fs_buf, "GIT_DISCOVERY_ACROSS_FILESYSTEM");
635 if (error == GIT_ENOTFOUND)
636 giterr_clear();
637 else if (error < 0)
638 goto error;
639 else {
640 int across_fs = 0;
641 error = git_config_parse_bool(&across_fs, git_buf_cstr(&across_fs_buf));
642 if (error < 0)
643 goto error;
644 if (across_fs)
645 flags |= GIT_REPOSITORY_OPEN_CROSS_FS;
646 }
647
648 error = git__getenv(&index_file_buf, "GIT_INDEX_FILE");
649 if (error == GIT_ENOTFOUND)
650 giterr_clear();
651 else if (error < 0)
652 goto error;
653 else {
654 error = git_index_open(&index, git_buf_cstr(&index_file_buf));
655 if (error < 0)
656 goto error;
657 }
658
659 error = git__getenv(&namespace_buf, "GIT_NAMESPACE");
660 if (error == GIT_ENOTFOUND)
661 giterr_clear();
662 else if (error < 0)
663 goto error;
664
665 error = git__getenv(&object_dir_buf, "GIT_OBJECT_DIRECTORY");
666 if (error == GIT_ENOTFOUND)
667 giterr_clear();
668 else if (error < 0)
669 goto error;
670 else {
671 error = git_odb_open(&odb, git_buf_cstr(&object_dir_buf));
672 if (error < 0)
673 goto error;
674 }
675
676 error = git__getenv(&work_tree_buf, "GIT_WORK_TREE");
677 if (error == GIT_ENOTFOUND)
678 giterr_clear();
679 else if (error < 0)
680 goto error;
681 else {
682 giterr_set(GITERR_INVALID, "GIT_WORK_TREE unimplemented");
683 error = GIT_ERROR;
684 goto error;
685 }
686
687 error = git__getenv(&work_tree_buf, "GIT_COMMON_DIR");
688 if (error == GIT_ENOTFOUND)
689 giterr_clear();
690 else if (error < 0)
691 goto error;
692 else {
693 giterr_set(GITERR_INVALID, "GIT_COMMON_DIR unimplemented");
694 error = GIT_ERROR;
695 goto error;
696 }
697
698 error = git_repository_open_ext(&repo, start_path, flags, ceiling_dirs);
699 if (error < 0)
700 goto error;
701
702 if (odb)
703 git_repository_set_odb(repo, odb);
704
705 error = git__getenv(&alts_buf, "GIT_ALTERNATE_OBJECT_DIRECTORIES");
706 if (error == GIT_ENOTFOUND) {
707 giterr_clear();
708 error = 0;
709 } else if (error < 0)
710 goto error;
711 else {
712 const char *end;
713 char *alt, *sep;
714 if (!odb) {
715 error = git_repository_odb(&odb, repo);
716 if (error < 0)
717 goto error;
718 }
719
720 end = git_buf_cstr(&alts_buf) + git_buf_len(&alts_buf);
721 for (sep = alt = alts_buf.ptr; sep != end; alt = sep+1) {
722 for (sep = alt; *sep && *sep != GIT_PATH_LIST_SEPARATOR; sep++)
723 ;
724 if (*sep)
725 *sep = '\0';
726 error = git_odb_add_disk_alternate(odb, alt);
727 if (error < 0)
728 goto error;
729 }
730 }
731
732 if (git_buf_len(&namespace_buf)) {
733 error = git_repository_set_namespace(repo, git_buf_cstr(&namespace_buf));
734 if (error < 0)
735 goto error;
736 }
737
738 git_repository_set_index(repo, index);
739
740 if (out) {
741 *out = repo;
742 goto success;
743 }
744 error:
745 git_repository_free(repo);
746 success:
747 git_odb_free(odb);
748 git_index_free(index);
749 git_buf_free(&common_dir_buf);
750 git_buf_free(&work_tree_buf);
751 git_buf_free(&alts_buf);
752 git_buf_free(&object_dir_buf);
753 git_buf_free(&namespace_buf);
754 git_buf_free(&index_file_buf);
755 git_buf_free(&across_fs_buf);
756 git_buf_free(&ceiling_dirs_buf);
757 git_buf_free(&dir_buf);
758 return error;
759 }
760
761 int git_repository_open_ext(
762 git_repository **repo_ptr,
763 const char *start_path,
764 unsigned int flags,
765 const char *ceiling_dirs)
766 {
767 int error;
768 git_buf path = GIT_BUF_INIT, parent = GIT_BUF_INIT,
769 link_path = GIT_BUF_INIT, common_path = GIT_BUF_INIT;
770 git_repository *repo;
771 git_config *config = NULL;
772
773 if (flags & GIT_REPOSITORY_OPEN_FROM_ENV)
774 return _git_repository_open_ext_from_env(repo_ptr, start_path);
775
776 if (repo_ptr)
777 *repo_ptr = NULL;
778
779 error = find_repo(
780 &path, &parent, &link_path, &common_path, start_path, flags, ceiling_dirs);
781
782 if (error < 0 || !repo_ptr)
783 return error;
784
785 repo = repository_alloc();
786 GITERR_CHECK_ALLOC(repo);
787
788 repo->gitdir = git_buf_detach(&path);
789 GITERR_CHECK_ALLOC(repo->gitdir);
790
791 if (link_path.size) {
792 repo->gitlink = git_buf_detach(&link_path);
793 GITERR_CHECK_ALLOC(repo->gitlink);
794 }
795 if (common_path.size) {
796 repo->commondir = git_buf_detach(&common_path);
797 GITERR_CHECK_ALLOC(repo->commondir);
798 }
799
800 if ((error = git_buf_joinpath(&path, repo->gitdir, "gitdir")) < 0)
801 goto cleanup;
802 /* A 'gitdir' file inside a git directory is currently
803 * only used when the repository is a working tree. */
804 if (git_path_exists(path.ptr))
805 repo->is_worktree = 1;
806
807 /*
808 * We'd like to have the config, but git doesn't particularly
809 * care if it's not there, so we need to deal with that.
810 */
811
812 error = git_repository_config_snapshot(&config, repo);
813 if (error < 0 && error != GIT_ENOTFOUND)
814 goto cleanup;
815
816 if (config && (error = check_repositoryformatversion(config)) < 0)
817 goto cleanup;
818
819 if ((flags & GIT_REPOSITORY_OPEN_BARE) != 0)
820 repo->is_bare = 1;
821 else {
822
823 if (config &&
824 ((error = load_config_data(repo, config)) < 0 ||
825 (error = load_workdir(repo, config, &parent)) < 0))
826 goto cleanup;
827 }
828
829 cleanup:
830 git_buf_free(&path);
831 git_buf_free(&parent);
832 git_config_free(config);
833
834 if (error < 0)
835 git_repository_free(repo);
836 else
837 *repo_ptr = repo;
838
839 return error;
840 }
841
842 int git_repository_open(git_repository **repo_out, const char *path)
843 {
844 return git_repository_open_ext(
845 repo_out, path, GIT_REPOSITORY_OPEN_NO_SEARCH, NULL);
846 }
847
848 int git_repository_open_from_worktree(git_repository **repo_out, git_worktree *wt)
849 {
850 git_buf path = GIT_BUF_INIT;
851 git_repository *repo = NULL;
852 int len, err;
853
854 assert(repo_out && wt);
855
856 *repo_out = NULL;
857 len = strlen(wt->gitlink_path);
858
859 if (len <= 4 || strcasecmp(wt->gitlink_path + len - 4, ".git")) {
860 err = -1;
861 goto out;
862 }
863
864 if ((err = git_buf_set(&path, wt->gitlink_path, len - 4)) < 0)
865 goto out;
866
867 if ((err = git_repository_open(&repo, path.ptr)) < 0)
868 goto out;
869
870 *repo_out = repo;
871
872 out:
873 git_buf_free(&path);
874
875 return err;
876 }
877
878 int git_repository_wrap_odb(git_repository **repo_out, git_odb *odb)
879 {
880 git_repository *repo;
881
882 repo = repository_alloc();
883 GITERR_CHECK_ALLOC(repo);
884
885 git_repository_set_odb(repo, odb);
886 *repo_out = repo;
887
888 return 0;
889 }
890
891 int git_repository_discover(
892 git_buf *out,
893 const char *start_path,
894 int across_fs,
895 const char *ceiling_dirs)
896 {
897 uint32_t flags = across_fs ? GIT_REPOSITORY_OPEN_CROSS_FS : 0;
898
899 assert(start_path);
900
901 git_buf_sanitize(out);
902
903 return find_repo(out, NULL, NULL, NULL, start_path, flags, ceiling_dirs);
904 }
905
906 static int load_config(
907 git_config **out,
908 git_repository *repo,
909 const char *global_config_path,
910 const char *xdg_config_path,
911 const char *system_config_path,
912 const char *programdata_path)
913 {
914 int error;
915 git_buf config_path = GIT_BUF_INIT;
916 git_config *cfg = NULL;
917
918 assert(repo && out);
919
920 if ((error = git_config_new(&cfg)) < 0)
921 return error;
922
923 error = git_repository_item_path(&config_path, repo, GIT_REPOSITORY_ITEM_CONFIG);
924 if (error < 0)
925 goto on_error;
926
927 if ((error = git_config_add_file_ondisk(
928 cfg, config_path.ptr, GIT_CONFIG_LEVEL_LOCAL, 0)) < 0 &&
929 error != GIT_ENOTFOUND)
930 goto on_error;
931
932 git_buf_free(&config_path);
933
934 if (global_config_path != NULL &&
935 (error = git_config_add_file_ondisk(
936 cfg, global_config_path, GIT_CONFIG_LEVEL_GLOBAL, 0)) < 0 &&
937 error != GIT_ENOTFOUND)
938 goto on_error;
939
940 if (xdg_config_path != NULL &&
941 (error = git_config_add_file_ondisk(
942 cfg, xdg_config_path, GIT_CONFIG_LEVEL_XDG, 0)) < 0 &&
943 error != GIT_ENOTFOUND)
944 goto on_error;
945
946 if (system_config_path != NULL &&
947 (error = git_config_add_file_ondisk(
948 cfg, system_config_path, GIT_CONFIG_LEVEL_SYSTEM, 0)) < 0 &&
949 error != GIT_ENOTFOUND)
950 goto on_error;
951
952 if (programdata_path != NULL &&
953 (error = git_config_add_file_ondisk(
954 cfg, programdata_path, GIT_CONFIG_LEVEL_PROGRAMDATA, 0)) < 0 &&
955 error != GIT_ENOTFOUND)
956 goto on_error;
957
958 giterr_clear(); /* clear any lingering ENOTFOUND errors */
959
960 *out = cfg;
961 return 0;
962
963 on_error:
964 git_buf_free(&config_path);
965 git_config_free(cfg);
966 *out = NULL;
967 return error;
968 }
969
970 static const char *path_unless_empty(git_buf *buf)
971 {
972 return git_buf_len(buf) > 0 ? git_buf_cstr(buf) : NULL;
973 }
974
975 int git_repository_config__weakptr(git_config **out, git_repository *repo)
976 {
977 int error = 0;
978
979 if (repo->_config == NULL) {
980 git_buf global_buf = GIT_BUF_INIT;
981 git_buf xdg_buf = GIT_BUF_INIT;
982 git_buf system_buf = GIT_BUF_INIT;
983 git_buf programdata_buf = GIT_BUF_INIT;
984 git_config *config;
985
986 git_config_find_global(&global_buf);
987 git_config_find_xdg(&xdg_buf);
988 git_config_find_system(&system_buf);
989 git_config_find_programdata(&programdata_buf);
990
991 /* If there is no global file, open a backend for it anyway */
992 if (git_buf_len(&global_buf) == 0)
993 git_config__global_location(&global_buf);
994
995 error = load_config(
996 &config, repo,
997 path_unless_empty(&global_buf),
998 path_unless_empty(&xdg_buf),
999 path_unless_empty(&system_buf),
1000 path_unless_empty(&programdata_buf));
1001 if (!error) {
1002 GIT_REFCOUNT_OWN(config, repo);
1003
1004 config = git__compare_and_swap(&repo->_config, NULL, config);
1005 if (config != NULL) {
1006 GIT_REFCOUNT_OWN(config, NULL);
1007 git_config_free(config);
1008 }
1009 }
1010
1011 git_buf_free(&global_buf);
1012 git_buf_free(&xdg_buf);
1013 git_buf_free(&system_buf);
1014 git_buf_free(&programdata_buf);
1015 }
1016
1017 *out = repo->_config;
1018 return error;
1019 }
1020
1021 int git_repository_config(git_config **out, git_repository *repo)
1022 {
1023 if (git_repository_config__weakptr(out, repo) < 0)
1024 return -1;
1025
1026 GIT_REFCOUNT_INC(*out);
1027 return 0;
1028 }
1029
1030 int git_repository_config_snapshot(git_config **out, git_repository *repo)
1031 {
1032 int error;
1033 git_config *weak;
1034
1035 if ((error = git_repository_config__weakptr(&weak, repo)) < 0)
1036 return error;
1037
1038 return git_config_snapshot(out, weak);
1039 }
1040
1041 void git_repository_set_config(git_repository *repo, git_config *config)
1042 {
1043 assert(repo && config);
1044 set_config(repo, config);
1045 }
1046
1047 int git_repository_odb__weakptr(git_odb **out, git_repository *repo)
1048 {
1049 int error = 0;
1050
1051 assert(repo && out);
1052
1053 if (repo->_odb == NULL) {
1054 git_buf odb_path = GIT_BUF_INIT;
1055 git_odb *odb;
1056
1057 if ((error = git_repository_item_path(&odb_path, repo,
1058 GIT_REPOSITORY_ITEM_OBJECTS)) < 0 ||
1059 (error = git_odb_new(&odb)) < 0)
1060 return error;
1061
1062 GIT_REFCOUNT_OWN(odb, repo);
1063
1064 if ((error = git_odb__set_caps(odb, GIT_ODB_CAP_FROM_OWNER)) < 0 ||
1065 (error = git_odb__add_default_backends(odb, odb_path.ptr, 0, 0)) < 0) {
1066 git_odb_free(odb);
1067 return error;
1068 }
1069
1070 odb = git__compare_and_swap(&repo->_odb, NULL, odb);
1071 if (odb != NULL) {
1072 GIT_REFCOUNT_OWN(odb, NULL);
1073 git_odb_free(odb);
1074 }
1075
1076 git_buf_free(&odb_path);
1077 }
1078
1079 *out = repo->_odb;
1080 return error;
1081 }
1082
1083 int git_repository_odb(git_odb **out, git_repository *repo)
1084 {
1085 if (git_repository_odb__weakptr(out, repo) < 0)
1086 return -1;
1087
1088 GIT_REFCOUNT_INC(*out);
1089 return 0;
1090 }
1091
1092 void git_repository_set_odb(git_repository *repo, git_odb *odb)
1093 {
1094 assert(repo && odb);
1095 set_odb(repo, odb);
1096 }
1097
1098 int git_repository_refdb__weakptr(git_refdb **out, git_repository *repo)
1099 {
1100 int error = 0;
1101
1102 assert(out && repo);
1103
1104 if (repo->_refdb == NULL) {
1105 git_refdb *refdb;
1106
1107 error = git_refdb_open(&refdb, repo);
1108 if (!error) {
1109 GIT_REFCOUNT_OWN(refdb, repo);
1110
1111 refdb = git__compare_and_swap(&repo->_refdb, NULL, refdb);
1112 if (refdb != NULL) {
1113 GIT_REFCOUNT_OWN(refdb, NULL);
1114 git_refdb_free(refdb);
1115 }
1116 }
1117 }
1118
1119 *out = repo->_refdb;
1120 return error;
1121 }
1122
1123 int git_repository_refdb(git_refdb **out, git_repository *repo)
1124 {
1125 if (git_repository_refdb__weakptr(out, repo) < 0)
1126 return -1;
1127
1128 GIT_REFCOUNT_INC(*out);
1129 return 0;
1130 }
1131
1132 void git_repository_set_refdb(git_repository *repo, git_refdb *refdb)
1133 {
1134 assert(repo && refdb);
1135 set_refdb(repo, refdb);
1136 }
1137
1138 int git_repository_index__weakptr(git_index **out, git_repository *repo)
1139 {
1140 int error = 0;
1141
1142 assert(out && repo);
1143
1144 if (repo->_index == NULL) {
1145 git_buf index_path = GIT_BUF_INIT;
1146 git_index *index;
1147
1148 if ((error = git_buf_joinpath(&index_path, repo->gitdir, GIT_INDEX_FILE)) < 0)
1149 return error;
1150
1151 error = git_index_open(&index, index_path.ptr);
1152 if (!error) {
1153 GIT_REFCOUNT_OWN(index, repo);
1154
1155 index = git__compare_and_swap(&repo->_index, NULL, index);
1156 if (index != NULL) {
1157 GIT_REFCOUNT_OWN(index, NULL);
1158 git_index_free(index);
1159 }
1160
1161 error = git_index_set_caps(repo->_index, GIT_INDEXCAP_FROM_OWNER);
1162 }
1163
1164 git_buf_free(&index_path);
1165 }
1166
1167 *out = repo->_index;
1168 return error;
1169 }
1170
1171 int git_repository_index(git_index **out, git_repository *repo)
1172 {
1173 if (git_repository_index__weakptr(out, repo) < 0)
1174 return -1;
1175
1176 GIT_REFCOUNT_INC(*out);
1177 return 0;
1178 }
1179
1180 void git_repository_set_index(git_repository *repo, git_index *index)
1181 {
1182 assert(repo);
1183 set_index(repo, index);
1184 }
1185
1186 int git_repository_set_namespace(git_repository *repo, const char *namespace)
1187 {
1188 git__free(repo->namespace);
1189
1190 if (namespace == NULL) {
1191 repo->namespace = NULL;
1192 return 0;
1193 }
1194
1195 return (repo->namespace = git__strdup(namespace)) ? 0 : -1;
1196 }
1197
1198 const char *git_repository_get_namespace(git_repository *repo)
1199 {
1200 return repo->namespace;
1201 }
1202
1203 #ifdef GIT_WIN32
1204 static int reserved_names_add8dot3(git_repository *repo, const char *path)
1205 {
1206 char *name = git_win32_path_8dot3_name(path);
1207 const char *def = GIT_DIR_SHORTNAME;
1208 const char *def_dot_git = DOT_GIT;
1209 size_t name_len, def_len = CONST_STRLEN(GIT_DIR_SHORTNAME);
1210 size_t def_dot_git_len = CONST_STRLEN(DOT_GIT);
1211 git_buf *buf;
1212
1213 if (!name)
1214 return 0;
1215
1216 name_len = strlen(name);
1217
1218 if ((name_len == def_len && memcmp(name, def, def_len) == 0) ||
1219 (name_len == def_dot_git_len && memcmp(name, def_dot_git, def_dot_git_len) == 0)) {
1220 git__free(name);
1221 return 0;
1222 }
1223
1224 if ((buf = git_array_alloc(repo->reserved_names)) == NULL)
1225 return -1;
1226
1227 git_buf_attach(buf, name, name_len);
1228 return true;
1229 }
1230
1231 bool git_repository__reserved_names(
1232 git_buf **out, size_t *outlen, git_repository *repo, bool include_ntfs)
1233 {
1234 GIT_UNUSED(include_ntfs);
1235
1236 if (repo->reserved_names.size == 0) {
1237 git_buf *buf;
1238 size_t i;
1239
1240 /* Add the static defaults */
1241 for (i = 0; i < git_repository__reserved_names_win32_len; i++) {
1242 if ((buf = git_array_alloc(repo->reserved_names)) == NULL)
1243 goto on_error;
1244
1245 buf->ptr = git_repository__reserved_names_win32[i].ptr;
1246 buf->size = git_repository__reserved_names_win32[i].size;
1247 }
1248
1249 /* Try to add any repo-specific reserved names - the gitlink file
1250 * within a submodule or the repository (if the repository directory
1251 * is beneath the workdir). These are typically `.git`, but should
1252 * be protected in case they are not. Note, repo and workdir paths
1253 * are always prettified to end in `/`, so a prefixcmp is safe.
1254 */
1255 if (!repo->is_bare) {
1256 int (*prefixcmp)(const char *, const char *);
1257 int error, ignorecase;
1258
1259 error = git_repository__cvar(
1260 &ignorecase, repo, GIT_CVAR_IGNORECASE);
1261 prefixcmp = (error || ignorecase) ? git__prefixcmp_icase :
1262 git__prefixcmp;
1263
1264 if (repo->gitlink &&
1265 reserved_names_add8dot3(repo, repo->gitlink) < 0)
1266 goto on_error;
1267
1268 if (repo->gitdir &&
1269 prefixcmp(repo->gitdir, repo->workdir) == 0 &&
1270 reserved_names_add8dot3(repo, repo->gitdir) < 0)
1271 goto on_error;
1272 }
1273 }
1274
1275 *out = repo->reserved_names.ptr;
1276 *outlen = repo->reserved_names.size;
1277
1278 return true;
1279
1280 /* Always give good defaults, even on OOM */
1281 on_error:
1282 *out = git_repository__reserved_names_win32;
1283 *outlen = git_repository__reserved_names_win32_len;
1284
1285 return false;
1286 }
1287 #else
1288 bool git_repository__reserved_names(
1289 git_buf **out, size_t *outlen, git_repository *repo, bool include_ntfs)
1290 {
1291 GIT_UNUSED(repo);
1292
1293 if (include_ntfs) {
1294 *out = git_repository__reserved_names_win32;
1295 *outlen = git_repository__reserved_names_win32_len;
1296 } else {
1297 *out = git_repository__reserved_names_posix;
1298 *outlen = git_repository__reserved_names_posix_len;
1299 }
1300
1301 return true;
1302 }
1303 #endif
1304
1305 static int check_repositoryformatversion(git_config *config)
1306 {
1307 int version, error;
1308
1309 error = git_config_get_int32(&version, config, "core.repositoryformatversion");
1310 /* git ignores this if the config variable isn't there */
1311 if (error == GIT_ENOTFOUND)
1312 return 0;
1313
1314 if (error < 0)
1315 return -1;
1316
1317 if (GIT_REPO_VERSION < version) {
1318 giterr_set(GITERR_REPOSITORY,
1319 "unsupported repository version %d. Only versions up to %d are supported.",
1320 version, GIT_REPO_VERSION);
1321 return -1;
1322 }
1323
1324 return 0;
1325 }
1326
1327 int git_repository_create_head(const char *git_dir, const char *ref_name)
1328 {
1329 git_buf ref_path = GIT_BUF_INIT;
1330 git_filebuf ref = GIT_FILEBUF_INIT;
1331 const char *fmt;
1332
1333 if (git_buf_joinpath(&ref_path, git_dir, GIT_HEAD_FILE) < 0 ||
1334 git_filebuf_open(&ref, ref_path.ptr, 0, GIT_REFS_FILE_MODE) < 0)
1335 goto fail;
1336
1337 if (!ref_name)
1338 ref_name = GIT_BRANCH_MASTER;
1339
1340 if (git__prefixcmp(ref_name, GIT_REFS_DIR) == 0)
1341 fmt = "ref: %s\n";
1342 else
1343 fmt = "ref: " GIT_REFS_HEADS_DIR "%s\n";
1344
1345 if (git_filebuf_printf(&ref, fmt, ref_name) < 0 ||
1346 git_filebuf_commit(&ref) < 0)
1347 goto fail;
1348
1349 git_buf_free(&ref_path);
1350 return 0;
1351
1352 fail:
1353 git_buf_free(&ref_path);
1354 git_filebuf_cleanup(&ref);
1355 return -1;
1356 }
1357
1358 static bool is_chmod_supported(const char *file_path)
1359 {
1360 struct stat st1, st2;
1361
1362 if (p_stat(file_path, &st1) < 0)
1363 return false;
1364
1365 if (p_chmod(file_path, st1.st_mode ^ S_IXUSR) < 0)
1366 return false;
1367
1368 if (p_stat(file_path, &st2) < 0)
1369 return false;
1370
1371 return (st1.st_mode != st2.st_mode);
1372 }
1373
1374 static bool is_filesystem_case_insensitive(const char *gitdir_path)
1375 {
1376 git_buf path = GIT_BUF_INIT;
1377 int is_insensitive = -1;
1378
1379 if (!git_buf_joinpath(&path, gitdir_path, "CoNfIg"))
1380 is_insensitive = git_path_exists(git_buf_cstr(&path));
1381
1382 git_buf_free(&path);
1383 return is_insensitive;
1384 }
1385
1386 static bool are_symlinks_supported(const char *wd_path)
1387 {
1388 git_buf path = GIT_BUF_INIT;
1389 int fd;
1390 struct stat st;
1391 int symlinks_supported = -1;
1392
1393 if ((fd = git_futils_mktmp(&path, wd_path, 0666)) < 0 ||
1394 p_close(fd) < 0 ||
1395 p_unlink(path.ptr) < 0 ||
1396 p_symlink("testing", path.ptr) < 0 ||
1397 p_lstat(path.ptr, &st) < 0)
1398 symlinks_supported = false;
1399 else
1400 symlinks_supported = (S_ISLNK(st.st_mode) != 0);
1401
1402 (void)p_unlink(path.ptr);
1403 git_buf_free(&path);
1404
1405 return symlinks_supported;
1406 }
1407
1408 static int create_empty_file(const char *path, mode_t mode)
1409 {
1410 int fd;
1411
1412 if ((fd = p_creat(path, mode)) < 0) {
1413 giterr_set(GITERR_OS, "error while creating '%s'", path);
1414 return -1;
1415 }
1416
1417 if (p_close(fd) < 0) {
1418 giterr_set(GITERR_OS, "error while closing '%s'", path);
1419 return -1;
1420 }
1421
1422 return 0;
1423 }
1424
1425 static int repo_local_config(
1426 git_config **out,
1427 git_buf *config_dir,
1428 git_repository *repo,
1429 const char *repo_dir)
1430 {
1431 int error = 0;
1432 git_config *parent;
1433 const char *cfg_path;
1434
1435 if (git_buf_joinpath(config_dir, repo_dir, GIT_CONFIG_FILENAME_INREPO) < 0)
1436 return -1;
1437 cfg_path = git_buf_cstr(config_dir);
1438
1439 /* make LOCAL config if missing */
1440 if (!git_path_isfile(cfg_path) &&
1441 (error = create_empty_file(cfg_path, GIT_CONFIG_FILE_MODE)) < 0)
1442 return error;
1443
1444 /* if no repo, just open that file directly */
1445 if (!repo)
1446 return git_config_open_ondisk(out, cfg_path);
1447
1448 /* otherwise, open parent config and get that level */
1449 if ((error = git_repository_config__weakptr(&parent, repo)) < 0)
1450 return error;
1451
1452 if (git_config_open_level(out, parent, GIT_CONFIG_LEVEL_LOCAL) < 0) {
1453 giterr_clear();
1454
1455 if (!(error = git_config_add_file_ondisk(
1456 parent, cfg_path, GIT_CONFIG_LEVEL_LOCAL, false)))
1457 error = git_config_open_level(out, parent, GIT_CONFIG_LEVEL_LOCAL);
1458 }
1459
1460 git_config_free(parent);
1461
1462 return error;
1463 }
1464
1465 static int repo_init_fs_configs(
1466 git_config *cfg,
1467 const char *cfg_path,
1468 const char *repo_dir,
1469 const char *work_dir,
1470 bool update_ignorecase)
1471 {
1472 int error = 0;
1473
1474 if (!work_dir)
1475 work_dir = repo_dir;
1476
1477 if ((error = git_config_set_bool(
1478 cfg, "core.filemode", is_chmod_supported(cfg_path))) < 0)
1479 return error;
1480
1481 if (!are_symlinks_supported(work_dir)) {
1482 if ((error = git_config_set_bool(cfg, "core.symlinks", false)) < 0)
1483 return error;
1484 } else if (git_config_delete_entry(cfg, "core.symlinks") < 0)
1485 giterr_clear();
1486
1487 if (update_ignorecase) {
1488 if (is_filesystem_case_insensitive(repo_dir)) {
1489 if ((error = git_config_set_bool(cfg, "core.ignorecase", true)) < 0)
1490 return error;
1491 } else if (git_config_delete_entry(cfg, "core.ignorecase") < 0)
1492 giterr_clear();
1493 }
1494
1495 #ifdef GIT_USE_ICONV
1496 if ((error = git_config_set_bool(
1497 cfg, "core.precomposeunicode",
1498 git_path_does_fs_decompose_unicode(work_dir))) < 0)
1499 return error;
1500 /* on non-iconv platforms, don't even set core.precomposeunicode */
1501 #endif
1502
1503 return 0;
1504 }
1505
1506 static int repo_init_config(
1507 const char *repo_dir,
1508 const char *work_dir,
1509 uint32_t flags,
1510 uint32_t mode)
1511 {
1512 int error = 0;
1513 git_buf cfg_path = GIT_BUF_INIT, worktree_path = GIT_BUF_INIT;
1514 git_config *config = NULL;
1515 bool is_bare = ((flags & GIT_REPOSITORY_INIT_BARE) != 0);
1516 bool is_reinit = ((flags & GIT_REPOSITORY_INIT__IS_REINIT) != 0);
1517
1518 if ((error = repo_local_config(&config, &cfg_path, NULL, repo_dir)) < 0)
1519 goto cleanup;
1520
1521 if (is_reinit && (error = check_repositoryformatversion(config)) < 0)
1522 goto cleanup;
1523
1524 #define SET_REPO_CONFIG(TYPE, NAME, VAL) do { \
1525 if ((error = git_config_set_##TYPE(config, NAME, VAL)) < 0) \
1526 goto cleanup; } while (0)
1527
1528 SET_REPO_CONFIG(bool, "core.bare", is_bare);
1529 SET_REPO_CONFIG(int32, "core.repositoryformatversion", GIT_REPO_VERSION);
1530
1531 if ((error = repo_init_fs_configs(
1532 config, cfg_path.ptr, repo_dir, work_dir, !is_reinit)) < 0)
1533 goto cleanup;
1534
1535 if (!is_bare) {
1536 SET_REPO_CONFIG(bool, "core.logallrefupdates", true);
1537
1538 if (!(flags & GIT_REPOSITORY_INIT__NATURAL_WD)) {
1539 if ((error = git_buf_sets(&worktree_path, work_dir)) < 0)
1540 goto cleanup;
1541
1542 if ((flags & GIT_REPOSITORY_INIT_RELATIVE_GITLINK))
1543 if ((error = git_path_make_relative(&worktree_path, repo_dir)) < 0)
1544 goto cleanup;
1545
1546 SET_REPO_CONFIG(string, "core.worktree", worktree_path.ptr);
1547 } else if (is_reinit) {
1548 if (git_config_delete_entry(config, "core.worktree") < 0)
1549 giterr_clear();
1550 }
1551 }
1552
1553 if (mode == GIT_REPOSITORY_INIT_SHARED_GROUP) {
1554 SET_REPO_CONFIG(int32, "core.sharedrepository", 1);
1555 SET_REPO_CONFIG(bool, "receive.denyNonFastforwards", true);
1556 }
1557 else if (mode == GIT_REPOSITORY_INIT_SHARED_ALL) {
1558 SET_REPO_CONFIG(int32, "core.sharedrepository", 2);
1559 SET_REPO_CONFIG(bool, "receive.denyNonFastforwards", true);
1560 }
1561
1562 cleanup:
1563 git_buf_free(&cfg_path);
1564 git_buf_free(&worktree_path);
1565 git_config_free(config);
1566
1567 return error;
1568 }
1569
1570 static int repo_reinit_submodule_fs(git_submodule *sm, const char *n, void *p)
1571 {
1572 git_repository *smrepo = NULL;
1573 GIT_UNUSED(n); GIT_UNUSED(p);
1574
1575 if (git_submodule_open(&smrepo, sm) < 0 ||
1576 git_repository_reinit_filesystem(smrepo, true) < 0)
1577 giterr_clear();
1578 git_repository_free(smrepo);
1579
1580 return 0;
1581 }
1582
1583 int git_repository_reinit_filesystem(git_repository *repo, int recurse)
1584 {
1585 int error = 0;
1586 git_buf path = GIT_BUF_INIT;
1587 git_config *config = NULL;
1588 const char *repo_dir = git_repository_path(repo);
1589
1590 if (!(error = repo_local_config(&config, &path, repo, repo_dir)))
1591 error = repo_init_fs_configs(
1592 config, path.ptr, repo_dir, git_repository_workdir(repo), true);
1593
1594 git_config_free(config);
1595 git_buf_free(&path);
1596
1597 git_repository__cvar_cache_clear(repo);
1598
1599 if (!repo->is_bare && recurse)
1600 (void)git_submodule_foreach(repo, repo_reinit_submodule_fs, NULL);
1601
1602 return error;
1603 }
1604
1605 static int repo_write_template(
1606 const char *git_dir,
1607 bool allow_overwrite,
1608 const char *file,
1609 mode_t mode,
1610 bool hidden,
1611 const char *content)
1612 {
1613 git_buf path = GIT_BUF_INIT;
1614 int fd, error = 0, flags;
1615
1616 if (git_buf_joinpath(&path, git_dir, file) < 0)
1617 return -1;
1618
1619 if (allow_overwrite)
1620 flags = O_WRONLY | O_CREAT | O_TRUNC;
1621 else
1622 flags = O_WRONLY | O_CREAT | O_EXCL;
1623
1624 fd = p_open(git_buf_cstr(&path), flags, mode);
1625
1626 if (fd >= 0) {
1627 error = p_write(fd, content, strlen(content));
1628
1629 p_close(fd);
1630 }
1631 else if (errno != EEXIST)
1632 error = fd;
1633
1634 #ifdef GIT_WIN32
1635 if (!error && hidden) {
1636 if (git_win32__set_hidden(path.ptr, true) < 0)
1637 error = -1;
1638 }
1639 #else
1640 GIT_UNUSED(hidden);
1641 #endif
1642
1643 git_buf_free(&path);
1644
1645 if (error)
1646 giterr_set(GITERR_OS,
1647 "failed to initialize repository with template '%s'", file);
1648
1649 return error;
1650 }
1651
1652 static int repo_write_gitlink(
1653 const char *in_dir, const char *to_repo, bool use_relative_path)
1654 {
1655 int error;
1656 git_buf buf = GIT_BUF_INIT;
1657 git_buf path_to_repo = GIT_BUF_INIT;
1658 struct stat st;
1659
1660 git_path_dirname_r(&buf, to_repo);
1661 git_path_to_dir(&buf);
1662 if (git_buf_oom(&buf))
1663 return -1;
1664
1665 /* don't write gitlink to natural workdir */
1666 if (git__suffixcmp(to_repo, "/" DOT_GIT "/") == 0 &&
1667 strcmp(in_dir, buf.ptr) == 0)
1668 {
1669 error = GIT_PASSTHROUGH;
1670 goto cleanup;
1671 }
1672
1673 if ((error = git_buf_joinpath(&buf, in_dir, DOT_GIT)) < 0)
1674 goto cleanup;
1675
1676 if (!p_stat(buf.ptr, &st) && !S_ISREG(st.st_mode)) {
1677 giterr_set(GITERR_REPOSITORY,
1678 "cannot overwrite gitlink file into path '%s'", in_dir);
1679 error = GIT_EEXISTS;
1680 goto cleanup;
1681 }
1682
1683 git_buf_clear(&buf);
1684
1685 error = git_buf_sets(&path_to_repo, to_repo);
1686
1687 if (!error && use_relative_path)
1688 error = git_path_make_relative(&path_to_repo, in_dir);
1689
1690 if (!error)
1691 error = git_buf_join(&buf, ' ', GIT_FILE_CONTENT_PREFIX, path_to_repo.ptr);
1692
1693 if (!error)
1694 error = repo_write_template(in_dir, true, DOT_GIT, 0666, true, buf.ptr);
1695
1696 cleanup:
1697 git_buf_free(&buf);
1698 git_buf_free(&path_to_repo);
1699 return error;
1700 }
1701
1702 static mode_t pick_dir_mode(git_repository_init_options *opts)
1703 {
1704 if (opts->mode == GIT_REPOSITORY_INIT_SHARED_UMASK)
1705 return 0777;
1706 if (opts->mode == GIT_REPOSITORY_INIT_SHARED_GROUP)
1707 return (0775 | S_ISGID);
1708 if (opts->mode == GIT_REPOSITORY_INIT_SHARED_ALL)
1709 return (0777 | S_ISGID);
1710 return opts->mode;
1711 }
1712
1713 #include "repo_template.h"
1714
1715 static int repo_init_structure(
1716 const char *repo_dir,
1717 const char *work_dir,
1718 git_repository_init_options *opts)
1719 {
1720 int error = 0;
1721 repo_template_item *tpl;
1722 bool external_tpl =
1723 ((opts->flags & GIT_REPOSITORY_INIT_EXTERNAL_TEMPLATE) != 0);
1724 mode_t dmode = pick_dir_mode(opts);
1725 bool chmod = opts->mode != GIT_REPOSITORY_INIT_SHARED_UMASK;
1726
1727 /* Hide the ".git" directory */
1728 #ifdef GIT_WIN32
1729 if ((opts->flags & GIT_REPOSITORY_INIT__HAS_DOTGIT) != 0) {
1730 if (git_win32__set_hidden(repo_dir, true) < 0) {
1731 giterr_set(GITERR_OS,
1732 "failed to mark Git repository folder as hidden");
1733 return -1;
1734 }
1735 }
1736 #endif
1737
1738 /* Create the .git gitlink if appropriate */
1739 if ((opts->flags & GIT_REPOSITORY_INIT_BARE) == 0 &&
1740 (opts->flags & GIT_REPOSITORY_INIT__NATURAL_WD) == 0)
1741 {
1742 if (repo_write_gitlink(work_dir, repo_dir, opts->flags & GIT_REPOSITORY_INIT_RELATIVE_GITLINK) < 0)
1743 return -1;
1744 }
1745
1746 /* Copy external template if requested */
1747 if (external_tpl) {
1748 git_config *cfg = NULL;
1749 const char *tdir = NULL;
1750 bool default_template = false;
1751 git_buf template_buf = GIT_BUF_INIT;
1752
1753 if (opts->template_path)
1754 tdir = opts->template_path;
1755 else if ((error = git_config_open_default(&cfg)) >= 0) {
1756 if (!git_config_get_path(&template_buf, cfg, "init.templatedir"))
1757 tdir = template_buf.ptr;
1758 giterr_clear();
1759 }
1760
1761 if (!tdir) {
1762 if (!(error = git_sysdir_find_template_dir(&template_buf)))
1763 tdir = template_buf.ptr;
1764 default_template = true;
1765 }
1766
1767 if (tdir) {
1768 uint32_t cpflags = GIT_CPDIR_COPY_SYMLINKS |
1769 GIT_CPDIR_SIMPLE_TO_MODE |
1770 GIT_CPDIR_COPY_DOTFILES;
1771 if (opts->mode != GIT_REPOSITORY_INIT_SHARED_UMASK)
1772 cpflags |= GIT_CPDIR_CHMOD_DIRS;
1773 error = git_futils_cp_r(tdir, repo_dir, cpflags, dmode);
1774 }
1775
1776 git_buf_free(&template_buf);
1777 git_config_free(cfg);
1778
1779 if (error < 0) {
1780 if (!default_template)
1781 return error;
1782
1783 /* if template was default, ignore error and use internal */
1784 giterr_clear();
1785 external_tpl = false;
1786 error = 0;
1787 }
1788 }
1789
1790 /* Copy internal template
1791 * - always ensure existence of dirs
1792 * - only create files if no external template was specified
1793 */
1794 for (tpl = repo_template; !error && tpl->path; ++tpl) {
1795 if (!tpl->content) {
1796 uint32_t mkdir_flags = GIT_MKDIR_PATH;
1797 if (chmod)
1798 mkdir_flags |= GIT_MKDIR_CHMOD;
1799
1800 error = git_futils_mkdir_relative(
1801 tpl->path, repo_dir, dmode, mkdir_flags, NULL);
1802 }
1803 else if (!external_tpl) {
1804 const char *content = tpl->content;
1805
1806 if (opts->description && strcmp(tpl->path, GIT_DESC_FILE) == 0)
1807 content = opts->description;
1808
1809 error = repo_write_template(
1810 repo_dir, false, tpl->path, tpl->mode, false, content);
1811 }
1812 }
1813
1814 return error;
1815 }
1816
1817 static int mkdir_parent(git_buf *buf, uint32_t mode, bool skip2)
1818 {
1819 /* When making parent directories during repository initialization
1820 * don't try to set gid or grant world write access
1821 */
1822 return git_futils_mkdir(
1823 buf->ptr, mode & ~(S_ISGID | 0002),
1824 GIT_MKDIR_PATH | GIT_MKDIR_VERIFY_DIR |
1825 (skip2 ? GIT_MKDIR_SKIP_LAST2 : GIT_MKDIR_SKIP_LAST));
1826 }
1827
1828 static int repo_init_directories(
1829 git_buf *repo_path,
1830 git_buf *wd_path,
1831 const char *given_repo,
1832 git_repository_init_options *opts)
1833 {
1834 int error = 0;
1835 bool is_bare, add_dotgit, has_dotgit, natural_wd;
1836 mode_t dirmode;
1837
1838 /* There are three possible rules for what we are allowed to create:
1839 * - MKPATH means anything we need
1840 * - MKDIR means just the .git directory and its parent and the workdir
1841 * - Neither means only the .git directory can be created
1842 *
1843 * There are 5 "segments" of path that we might need to deal with:
1844 * 1. The .git directory
1845 * 2. The parent of the .git directory
1846 * 3. Everything above the parent of the .git directory
1847 * 4. The working directory (often the same as #2)
1848 * 5. Everything above the working directory (often the same as #3)
1849 *
1850 * For all directories created, we start with the init_mode value for
1851 * permissions and then strip off bits in some cases:
1852 *
1853 * For MKPATH, we create #3 (and #5) paths without S_ISGID or S_IWOTH
1854 * For MKPATH and MKDIR, we create #2 (and #4) without S_ISGID
1855 * For all rules, we create #1 using the untouched init_mode
1856 */
1857
1858 /* set up repo path */
1859
1860 is_bare = ((opts->flags & GIT_REPOSITORY_INIT_BARE) != 0);
1861
1862 add_dotgit =
1863 (opts->flags & GIT_REPOSITORY_INIT_NO_DOTGIT_DIR) == 0 &&
1864 !is_bare &&
1865 git__suffixcmp(given_repo, "/" DOT_GIT) != 0 &&
1866 git__suffixcmp(given_repo, "/" GIT_DIR) != 0;
1867
1868 if (git_buf_joinpath(repo_path, given_repo, add_dotgit ? GIT_DIR : "") < 0)
1869 return -1;
1870
1871 has_dotgit = (git__suffixcmp(repo_path->ptr, "/" GIT_DIR) == 0);
1872 if (has_dotgit)
1873 opts->flags |= GIT_REPOSITORY_INIT__HAS_DOTGIT;
1874
1875 /* set up workdir path */
1876
1877 if (!is_bare) {
1878 if (opts->workdir_path) {
1879 if (git_path_join_unrooted(
1880 wd_path, opts->workdir_path, repo_path->ptr, NULL) < 0)
1881 return -1;
1882 } else if (has_dotgit) {
1883 if (git_path_dirname_r(wd_path, repo_path->ptr) < 0)
1884 return -1;
1885 } else {
1886 giterr_set(GITERR_REPOSITORY, "cannot pick working directory"
1887 " for non-bare repository that isn't a '.git' directory");
1888 return -1;
1889 }
1890
1891 if (git_path_to_dir(wd_path) < 0)
1892 return -1;
1893 } else {
1894 git_buf_clear(wd_path);
1895 }
1896
1897 natural_wd =
1898 has_dotgit &&
1899 wd_path->size > 0 &&
1900 wd_path->size + strlen(GIT_DIR) == repo_path->size &&
1901 memcmp(repo_path->ptr, wd_path->ptr, wd_path->size) == 0;
1902 if (natural_wd)
1903 opts->flags |= GIT_REPOSITORY_INIT__NATURAL_WD;
1904
1905 /* create directories as needed / requested */
1906
1907 dirmode = pick_dir_mode(opts);
1908
1909 if ((opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0) {
1910 /* create path #5 */
1911 if (wd_path->size > 0 &&
1912 (error = mkdir_parent(wd_path, dirmode, false)) < 0)
1913 return error;
1914
1915 /* create path #3 (if not the same as #5) */
1916 if (!natural_wd &&
1917 (error = mkdir_parent(repo_path, dirmode, has_dotgit)) < 0)
1918 return error;
1919 }
1920
1921 if ((opts->flags & GIT_REPOSITORY_INIT_MKDIR) != 0 ||
1922 (opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0)
1923 {
1924 /* create path #4 */
1925 if (wd_path->size > 0 &&
1926 (error = git_futils_mkdir(
1927 wd_path->ptr, dirmode & ~S_ISGID,
1928 GIT_MKDIR_VERIFY_DIR)) < 0)
1929 return error;
1930
1931 /* create path #2 (if not the same as #4) */
1932 if (!natural_wd &&
1933 (error = git_futils_mkdir(
1934 repo_path->ptr, dirmode & ~S_ISGID,
1935 GIT_MKDIR_VERIFY_DIR | GIT_MKDIR_SKIP_LAST)) < 0)
1936 return error;
1937 }
1938
1939 if ((opts->flags & GIT_REPOSITORY_INIT_MKDIR) != 0 ||
1940 (opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0 ||
1941 has_dotgit)
1942 {
1943 /* create path #1 */
1944 error = git_futils_mkdir(repo_path->ptr, dirmode,
1945 GIT_MKDIR_VERIFY_DIR | ((dirmode & S_ISGID) ? GIT_MKDIR_CHMOD : 0));
1946 }
1947
1948 /* prettify both directories now that they are created */
1949
1950 if (!error) {
1951 error = git_path_prettify_dir(repo_path, repo_path->ptr, NULL);
1952
1953 if (!error && wd_path->size > 0)
1954 error = git_path_prettify_dir(wd_path, wd_path->ptr, NULL);
1955 }
1956
1957 return error;
1958 }
1959
1960 static int repo_init_create_origin(git_repository *repo, const char *url)
1961 {
1962 int error;
1963 git_remote *remote;
1964
1965 if (!(error = git_remote_create(&remote, repo, GIT_REMOTE_ORIGIN, url))) {
1966 git_remote_free(remote);
1967 }
1968
1969 return error;
1970 }
1971
1972 int git_repository_init(
1973 git_repository **repo_out, const char *path, unsigned is_bare)
1974 {
1975 git_repository_init_options opts = GIT_REPOSITORY_INIT_OPTIONS_INIT;
1976
1977 opts.flags = GIT_REPOSITORY_INIT_MKPATH; /* don't love this default */
1978 if (is_bare)
1979 opts.flags |= GIT_REPOSITORY_INIT_BARE;
1980
1981 return git_repository_init_ext(repo_out, path, &opts);
1982 }
1983
1984 int git_repository_init_ext(
1985 git_repository **out,
1986 const char *given_repo,
1987 git_repository_init_options *opts)
1988 {
1989 int error;
1990 git_buf repo_path = GIT_BUF_INIT, wd_path = GIT_BUF_INIT,
1991 common_path = GIT_BUF_INIT;
1992 const char *wd;
1993
1994 assert(out && given_repo && opts);
1995
1996 GITERR_CHECK_VERSION(opts, GIT_REPOSITORY_INIT_OPTIONS_VERSION, "git_repository_init_options");
1997
1998 error = repo_init_directories(&repo_path, &wd_path, given_repo, opts);
1999 if (error < 0)
2000 goto cleanup;
2001
2002 wd = (opts->flags & GIT_REPOSITORY_INIT_BARE) ? NULL : git_buf_cstr(&wd_path);
2003 if (valid_repository_path(&repo_path, &common_path)) {
2004
2005 if ((opts->flags & GIT_REPOSITORY_INIT_NO_REINIT) != 0) {
2006 giterr_set(GITERR_REPOSITORY,
2007 "attempt to reinitialize '%s'", given_repo);
2008 error = GIT_EEXISTS;
2009 goto cleanup;
2010 }
2011
2012 opts->flags |= GIT_REPOSITORY_INIT__IS_REINIT;
2013
2014 error = repo_init_config(
2015 repo_path.ptr, wd, opts->flags, opts->mode);
2016
2017 /* TODO: reinitialize the templates */
2018 }
2019 else {
2020 if (!(error = repo_init_structure(
2021 repo_path.ptr, wd, opts)) &&
2022 !(error = repo_init_config(
2023 repo_path.ptr, wd, opts->flags, opts->mode)))
2024 error = git_repository_create_head(
2025 repo_path.ptr, opts->initial_head);
2026 }
2027 if (error < 0)
2028 goto cleanup;
2029
2030 error = git_repository_open(out, repo_path.ptr);
2031
2032 if (!error && opts->origin_url)
2033 error = repo_init_create_origin(*out, opts->origin_url);
2034
2035 cleanup:
2036 git_buf_free(&common_path);
2037 git_buf_free(&repo_path);
2038 git_buf_free(&wd_path);
2039
2040 return error;
2041 }
2042
2043 int git_repository_head_detached(git_repository *repo)
2044 {
2045 git_reference *ref;
2046 git_odb *odb = NULL;
2047 int exists;
2048
2049 if (git_repository_odb__weakptr(&odb, repo) < 0)
2050 return -1;
2051
2052 if (git_reference_lookup(&ref, repo, GIT_HEAD_FILE) < 0)
2053 return -1;
2054
2055 if (git_reference_type(ref) == GIT_REF_SYMBOLIC) {
2056 git_reference_free(ref);
2057 return 0;
2058 }
2059
2060 exists = git_odb_exists(odb, git_reference_target(ref));
2061
2062 git_reference_free(ref);
2063 return exists;
2064 }
2065
2066 static int read_worktree_head(git_buf *out, git_repository *repo, const char *name)
2067 {
2068 git_buf path = GIT_BUF_INIT;
2069 int err;
2070
2071 assert(out && repo && name);
2072
2073 git_buf_clear(out);
2074
2075 if ((err = git_buf_printf(&path, "%s/worktrees/%s/HEAD", repo->commondir, name)) < 0)
2076 goto out;
2077 if (!git_path_exists(path.ptr))
2078 {
2079 err = -1;
2080 goto out;
2081 }
2082
2083 if ((err = git_futils_readbuffer(out, path.ptr)) < 0)
2084 goto out;
2085 git_buf_rtrim(out);
2086
2087 out:
2088 git_buf_free(&path);
2089
2090 return err;
2091 }
2092
2093 int git_repository_head_detached_for_worktree(git_repository *repo, const char *name)
2094 {
2095 git_buf buf = GIT_BUF_INIT;
2096 int ret;
2097
2098 assert(repo && name);
2099
2100 if (read_worktree_head(&buf, repo, name) < 0)
2101 return -1;
2102
2103 ret = git__strncmp(buf.ptr, GIT_SYMREF, strlen(GIT_SYMREF)) != 0;
2104 git_buf_free(&buf);
2105
2106 return ret;
2107 }
2108
2109 int git_repository_head(git_reference **head_out, git_repository *repo)
2110 {
2111 git_reference *head;
2112 int error;
2113
2114 if ((error = git_reference_lookup(&head, repo, GIT_HEAD_FILE)) < 0)
2115 return error;
2116
2117 if (git_reference_type(head) == GIT_REF_OID) {
2118 *head_out = head;
2119 return 0;
2120 }
2121
2122 error = git_reference_lookup_resolved(head_out, repo, git_reference_symbolic_target(head), -1);
2123 git_reference_free(head);
2124
2125 return error == GIT_ENOTFOUND ? GIT_EUNBORNBRANCH : error;
2126 }
2127
2128 int git_repository_head_for_worktree(git_reference **out, git_repository *repo, const char *name)
2129 {
2130 git_buf buf = GIT_BUF_INIT;
2131 git_reference *head;
2132 int err;
2133
2134 assert(out && repo && name);
2135
2136 *out = NULL;
2137
2138 if (git_repository_head_detached_for_worktree(repo, name))
2139 return -1;
2140 if ((err = read_worktree_head(&buf, repo, name)) < 0)
2141 goto out;
2142
2143 /* We can only resolve symbolic references */
2144 if (git__strncmp(buf.ptr, GIT_SYMREF, strlen(GIT_SYMREF)))
2145 {
2146 err = -1;
2147 goto out;
2148 }
2149 git_buf_consume(&buf, buf.ptr + strlen(GIT_SYMREF));
2150
2151 if ((err = git_reference_lookup(&head, repo, buf.ptr)) < 0)
2152 goto out;
2153 if (git_reference_type(head) == GIT_REF_OID)
2154 {
2155 *out = head;
2156 err = 0;
2157 goto out;
2158 }
2159
2160 err = git_reference_lookup_resolved(
2161 out, repo, git_reference_symbolic_target(head), -1);
2162 git_reference_free(head);
2163
2164 out:
2165 git_buf_free(&buf);
2166
2167 return err;
2168 }
2169
2170 int git_repository_head_unborn(git_repository *repo)
2171 {
2172 git_reference *ref = NULL;
2173 int error;
2174
2175 error = git_repository_head(&ref, repo);
2176 git_reference_free(ref);
2177
2178 if (error == GIT_EUNBORNBRANCH) {
2179 giterr_clear();
2180 return 1;
2181 }
2182
2183 if (error < 0)
2184 return -1;
2185
2186 return 0;
2187 }
2188
2189 static int at_least_one_cb(const char *refname, void *payload)
2190 {
2191 GIT_UNUSED(refname);
2192 GIT_UNUSED(payload);
2193 return GIT_PASSTHROUGH;
2194 }
2195
2196 static int repo_contains_no_reference(git_repository *repo)
2197 {
2198 int error = git_reference_foreach_name(repo, &at_least_one_cb, NULL);
2199
2200 if (error == GIT_PASSTHROUGH)
2201 return 0;
2202
2203 if (!error)
2204 return 1;
2205
2206 return error;
2207 }
2208
2209 int git_repository_is_empty(git_repository *repo)
2210 {
2211 git_reference *head = NULL;
2212 int is_empty = 0;
2213
2214 if (git_reference_lookup(&head, repo, GIT_HEAD_FILE) < 0)
2215 return -1;
2216
2217 if (git_reference_type(head) == GIT_REF_SYMBOLIC)
2218 is_empty =
2219 (strcmp(git_reference_symbolic_target(head),
2220 GIT_REFS_HEADS_DIR "master") == 0) &&
2221 repo_contains_no_reference(repo);
2222
2223 git_reference_free(head);
2224
2225 return is_empty;
2226 }
2227
2228 int git_repository_item_path(git_buf *out, git_repository *repo, git_repository_item_t item)
2229 {
2230 const char *parent;
2231
2232 switch (items[item].parent) {
2233 case GIT_REPOSITORY_ITEM_GITDIR:
2234 parent = git_repository_path(repo);
2235 break;
2236 case GIT_REPOSITORY_ITEM_WORKDIR:
2237 parent = git_repository_workdir(repo);
2238 break;
2239 case GIT_REPOSITORY_ITEM_COMMONDIR:
2240 parent = git_repository_commondir(repo);
2241 break;
2242 default:
2243 giterr_set(GITERR_INVALID, "Invalid item directory");
2244 return -1;
2245 }
2246
2247 if (parent == NULL) {
2248 giterr_set(GITERR_INVALID, "Path cannot exist in repository");
2249 return -1;
2250 }
2251
2252 if (git_buf_sets(out, parent) < 0)
2253 return -1;
2254
2255 if (items[item].name) {
2256 if (git_buf_joinpath(out, parent, items[item].name) < 0)
2257 return -1;
2258 }
2259
2260 if (items[item].directory) {
2261 if (git_path_to_dir(out) < 0)
2262 return -1;
2263 }
2264
2265 return 0;
2266 }
2267
2268 const char *git_repository_path(git_repository *repo)
2269 {
2270 assert(repo);
2271 return repo->gitdir;
2272 }
2273
2274 const char *git_repository_workdir(git_repository *repo)
2275 {
2276 assert(repo);
2277
2278 if (repo->is_bare)
2279 return NULL;
2280
2281 return repo->workdir;
2282 }
2283
2284 const char *git_repository_commondir(git_repository *repo)
2285 {
2286 assert(repo);
2287 return repo->commondir;
2288 }
2289
2290 int git_repository_set_workdir(
2291 git_repository *repo, const char *workdir, int update_gitlink)
2292 {
2293 int error = 0;
2294 git_buf path = GIT_BUF_INIT;
2295
2296 assert(repo && workdir);
2297
2298 if (git_path_prettify_dir(&path, workdir, NULL) < 0)
2299 return -1;
2300
2301 if (repo->workdir && strcmp(repo->workdir, path.ptr) == 0)
2302 return 0;
2303
2304 if (update_gitlink) {
2305 git_config *config;
2306
2307 if (git_repository_config__weakptr(&config, repo) < 0)
2308 return -1;
2309
2310 error = repo_write_gitlink(path.ptr, git_repository_path(repo), false);
2311
2312 /* passthrough error means gitlink is unnecessary */
2313 if (error == GIT_PASSTHROUGH)
2314 error = git_config_delete_entry(config, "core.worktree");
2315 else if (!error)
2316 error = git_config_set_string(config, "core.worktree", path.ptr);
2317
2318 if (!error)
2319 error = git_config_set_bool(config, "core.bare", false);
2320 }
2321
2322 if (!error) {
2323 char *old_workdir = repo->workdir;
2324
2325 repo->workdir = git_buf_detach(&path);
2326 repo->is_bare = 0;
2327
2328 git__free(old_workdir);
2329 }
2330
2331 return error;
2332 }
2333
2334 int git_repository_is_bare(git_repository *repo)
2335 {
2336 assert(repo);
2337 return repo->is_bare;
2338 }
2339
2340 int git_repository_is_worktree(git_repository *repo)
2341 {
2342 assert(repo);
2343 return repo->is_worktree;
2344 }
2345
2346 int git_repository_set_bare(git_repository *repo)
2347 {
2348 int error;
2349 git_config *config;
2350
2351 assert(repo);
2352
2353 if (repo->is_bare)
2354 return 0;
2355
2356 if ((error = git_repository_config__weakptr(&config, repo)) < 0)
2357 return error;
2358
2359 if ((error = git_config_set_bool(config, "core.bare", true)) < 0)
2360 return error;
2361
2362 if ((error = git_config__update_entry(config, "core.worktree", NULL, true, true)) < 0)
2363 return error;
2364
2365 git__free(repo->workdir);
2366 repo->workdir = NULL;
2367 repo->is_bare = 1;
2368
2369 return 0;
2370 }
2371
2372 int git_repository_head_tree(git_tree **tree, git_repository *repo)
2373 {
2374 git_reference *head;
2375 git_object *obj;
2376 int error;
2377
2378 if ((error = git_repository_head(&head, repo)) < 0)
2379 return error;
2380
2381 if ((error = git_reference_peel(&obj, head, GIT_OBJ_TREE)) < 0)
2382 goto cleanup;
2383
2384 *tree = (git_tree *)obj;
2385
2386 cleanup:
2387 git_reference_free(head);
2388 return error;
2389 }
2390
2391 int git_repository__set_orig_head(git_repository *repo, const git_oid *orig_head)
2392 {
2393 git_filebuf file = GIT_FILEBUF_INIT;
2394 git_buf file_path = GIT_BUF_INIT;
2395 char orig_head_str[GIT_OID_HEXSZ];
2396 int error = 0;
2397
2398 git_oid_fmt(orig_head_str, orig_head);
2399
2400 if ((error = git_buf_joinpath(&file_path, repo->gitdir, GIT_ORIG_HEAD_FILE)) == 0 &&
2401 (error = git_filebuf_open(&file, file_path.ptr, GIT_FILEBUF_FORCE, GIT_MERGE_FILE_MODE)) == 0 &&
2402 (error = git_filebuf_printf(&file, "%.*s\n", GIT_OID_HEXSZ, orig_head_str)) == 0)
2403 error = git_filebuf_commit(&file);
2404
2405 if (error < 0)
2406 git_filebuf_cleanup(&file);
2407
2408 git_buf_free(&file_path);
2409
2410 return error;
2411 }
2412
2413 int git_repository_message(git_buf *out, git_repository *repo)
2414 {
2415 git_buf path = GIT_BUF_INIT;
2416 struct stat st;
2417 int error;
2418
2419 git_buf_sanitize(out);
2420
2421 if (git_buf_joinpath(&path, repo->gitdir, GIT_MERGE_MSG_FILE) < 0)
2422 return -1;
2423
2424 if ((error = p_stat(git_buf_cstr(&path), &st)) < 0) {
2425 if (errno == ENOENT)
2426 error = GIT_ENOTFOUND;
2427 giterr_set(GITERR_OS, "could not access message file");
2428 } else {
2429 error = git_futils_readbuffer(out, git_buf_cstr(&path));
2430 }
2431
2432 git_buf_free(&path);
2433
2434 return error;
2435 }
2436
2437 int git_repository_message_remove(git_repository *repo)
2438 {
2439 git_buf path = GIT_BUF_INIT;
2440 int error;
2441
2442 if (git_buf_joinpath(&path, repo->gitdir, GIT_MERGE_MSG_FILE) < 0)
2443 return -1;
2444
2445 error = p_unlink(git_buf_cstr(&path));
2446 git_buf_free(&path);
2447
2448 return error;
2449 }
2450
2451 int git_repository_hashfile(
2452 git_oid *out,
2453 git_repository *repo,
2454 const char *path,
2455 git_otype type,
2456 const char *as_path)
2457 {
2458 int error;
2459 git_filter_list *fl = NULL;
2460 git_file fd = -1;
2461 git_off_t len;
2462 git_buf full_path = GIT_BUF_INIT;
2463
2464 assert(out && path && repo); /* as_path can be NULL */
2465
2466 /* At some point, it would be nice if repo could be NULL to just
2467 * apply filter rules defined in system and global files, but for
2468 * now that is not possible because git_filters_load() needs it.
2469 */
2470
2471 error = git_path_join_unrooted(
2472 &full_path, path, git_repository_workdir(repo), NULL);
2473 if (error < 0)
2474 return error;
2475
2476 if (!as_path)
2477 as_path = path;
2478
2479 /* passing empty string for "as_path" indicated --no-filters */
2480 if (strlen(as_path) > 0) {
2481 error = git_filter_list_load(
2482 &fl, repo, NULL, as_path,
2483 GIT_FILTER_TO_ODB, GIT_FILTER_DEFAULT);
2484 if (error < 0)
2485 return error;
2486 } else {
2487 error = 0;
2488 }
2489
2490 /* at this point, error is a count of the number of loaded filters */
2491
2492 fd = git_futils_open_ro(full_path.ptr);
2493 if (fd < 0) {
2494 error = fd;
2495 goto cleanup;
2496 }
2497
2498 len = git_futils_filesize(fd);
2499 if (len < 0) {
2500 error = (int)len;
2501 goto cleanup;
2502 }
2503
2504 if (!git__is_sizet(len)) {
2505 giterr_set(GITERR_OS, "file size overflow for 32-bit systems");
2506 error = -1;
2507 goto cleanup;
2508 }
2509
2510 error = git_odb__hashfd_filtered(out, fd, (size_t)len, type, fl);
2511
2512 cleanup:
2513 if (fd >= 0)
2514 p_close(fd);
2515 git_filter_list_free(fl);
2516 git_buf_free(&full_path);
2517
2518 return error;
2519 }
2520
2521 static int checkout_message(git_buf *out, git_reference *old, const char *new)
2522 {
2523 git_buf_puts(out, "checkout: moving from ");
2524
2525 if (git_reference_type(old) == GIT_REF_SYMBOLIC)
2526 git_buf_puts(out, git_reference__shorthand(git_reference_symbolic_target(old)));
2527 else
2528 git_buf_puts(out, git_oid_tostr_s(git_reference_target(old)));
2529
2530 git_buf_puts(out, " to ");
2531
2532 if (git_reference__is_branch(new))
2533 git_buf_puts(out, git_reference__shorthand(new));
2534 else
2535 git_buf_puts(out, new);
2536
2537 if (git_buf_oom(out))
2538 return -1;
2539
2540 return 0;
2541 }
2542
2543 int git_repository_set_head(
2544 git_repository* repo,
2545 const char* refname)
2546 {
2547 git_reference *ref = NULL, *current = NULL, *new_head = NULL;
2548 git_buf log_message = GIT_BUF_INIT;
2549 int error;
2550
2551 assert(repo && refname);
2552
2553 if ((error = git_reference_lookup(&current, repo, GIT_HEAD_FILE)) < 0)
2554 return error;
2555
2556 if ((error = checkout_message(&log_message, current, refname)) < 0)
2557 goto cleanup;
2558
2559 error = git_reference_lookup(&ref, repo, refname);
2560 if (error < 0 && error != GIT_ENOTFOUND)
2561 goto cleanup;
2562
2563 if (ref && current->type == GIT_REF_SYMBOLIC && git__strcmp(current->target.symbolic, ref->name) &&
2564 git_reference_is_branch(ref) && git_branch_is_checked_out(ref)) {
2565 error = -1;
2566 goto cleanup;
2567 }
2568
2569 if (!error) {
2570 if (git_reference_is_branch(ref)) {
2571 error = git_reference_symbolic_create(&new_head, repo, GIT_HEAD_FILE,
2572 git_reference_name(ref), true, git_buf_cstr(&log_message));
2573 } else {
2574 error = git_repository_set_head_detached(repo, git_reference_target(ref));
2575 }
2576 } else if (git_reference__is_branch(refname)) {
2577 error = git_reference_symbolic_create(&new_head, repo, GIT_HEAD_FILE, refname,
2578 true, git_buf_cstr(&log_message));
2579 }
2580
2581 cleanup:
2582 git_buf_free(&log_message);
2583 git_reference_free(current);
2584 git_reference_free(ref);
2585 git_reference_free(new_head);
2586 return error;
2587 }
2588
2589 static int detach(git_repository *repo, const git_oid *id, const char *from)
2590 {
2591 int error;
2592 git_buf log_message = GIT_BUF_INIT;
2593 git_object *object = NULL, *peeled = NULL;
2594 git_reference *new_head = NULL, *current = NULL;
2595
2596 assert(repo && id);
2597
2598 if ((error = git_reference_lookup(&current, repo, GIT_HEAD_FILE)) < 0)
2599 return error;
2600
2601 if ((error = git_object_lookup(&object, repo, id, GIT_OBJ_ANY)) < 0)
2602 goto cleanup;
2603
2604 if ((error = git_object_peel(&peeled, object, GIT_OBJ_COMMIT)) < 0)
2605 goto cleanup;
2606
2607 if (from == NULL)
2608 from = git_oid_tostr_s(git_object_id(peeled));
2609
2610 if ((error = checkout_message(&log_message, current, from)) < 0)
2611 goto cleanup;
2612
2613 error = git_reference_create(&new_head, repo, GIT_HEAD_FILE, git_object_id(peeled), true, git_buf_cstr(&log_message));
2614
2615 cleanup:
2616 git_buf_free(&log_message);
2617 git_object_free(object);
2618 git_object_free(peeled);
2619 git_reference_free(current);
2620 git_reference_free(new_head);
2621 return error;
2622 }
2623
2624 int git_repository_set_head_detached(
2625 git_repository* repo,
2626 const git_oid* commitish)
2627 {
2628 return detach(repo, commitish, NULL);
2629 }
2630
2631 int git_repository_set_head_detached_from_annotated(
2632 git_repository *repo,
2633 const git_annotated_commit *commitish)
2634 {
2635 assert(repo && commitish);
2636
2637 return detach(repo, git_annotated_commit_id(commitish), commitish->description);
2638 }
2639
2640 int git_repository_detach_head(git_repository* repo)
2641 {
2642 git_reference *old_head = NULL, *new_head = NULL, *current = NULL;
2643 git_object *object = NULL;
2644 git_buf log_message = GIT_BUF_INIT;
2645 int error;
2646
2647 assert(repo);
2648
2649 if ((error = git_reference_lookup(&current, repo, GIT_HEAD_FILE)) < 0)
2650 return error;
2651
2652 if ((error = git_repository_head(&old_head, repo)) < 0)
2653 goto cleanup;
2654
2655 if ((error = git_object_lookup(&object, repo, git_reference_target(old_head), GIT_OBJ_COMMIT)) < 0)
2656 goto cleanup;
2657
2658 if ((error = checkout_message(&log_message, current, git_oid_tostr_s(git_object_id(object)))) < 0)
2659 goto cleanup;
2660
2661 error = git_reference_create(&new_head, repo, GIT_HEAD_FILE, git_reference_target(old_head),
2662 1, git_buf_cstr(&log_message));
2663
2664 cleanup:
2665 git_buf_free(&log_message);
2666 git_object_free(object);
2667 git_reference_free(old_head);
2668 git_reference_free(new_head);
2669 git_reference_free(current);
2670 return error;
2671 }
2672
2673 /**
2674 * Loosely ported from git.git
2675 * https://github.com/git/git/blob/master/contrib/completion/git-prompt.sh#L198-289
2676 */
2677 int git_repository_state(git_repository *repo)
2678 {
2679 git_buf repo_path = GIT_BUF_INIT;
2680 int state = GIT_REPOSITORY_STATE_NONE;
2681
2682 assert(repo);
2683
2684 if (git_buf_puts(&repo_path, repo->gitdir) < 0)
2685 return -1;
2686
2687 if (git_path_contains_file(&repo_path, GIT_REBASE_MERGE_INTERACTIVE_FILE))
2688 state = GIT_REPOSITORY_STATE_REBASE_INTERACTIVE;
2689 else if (git_path_contains_dir(&repo_path, GIT_REBASE_MERGE_DIR))
2690 state = GIT_REPOSITORY_STATE_REBASE_MERGE;
2691 else if (git_path_contains_file(&repo_path, GIT_REBASE_APPLY_REBASING_FILE))
2692 state = GIT_REPOSITORY_STATE_REBASE;
2693 else if (git_path_contains_file(&repo_path, GIT_REBASE_APPLY_APPLYING_FILE))
2694 state = GIT_REPOSITORY_STATE_APPLY_MAILBOX;
2695 else if (git_path_contains_dir(&repo_path, GIT_REBASE_APPLY_DIR))
2696 state = GIT_REPOSITORY_STATE_APPLY_MAILBOX_OR_REBASE;
2697 else if (git_path_contains_file(&repo_path, GIT_MERGE_HEAD_FILE))
2698 state = GIT_REPOSITORY_STATE_MERGE;
2699 else if (git_path_contains_file(&repo_path, GIT_REVERT_HEAD_FILE)) {
2700 state = GIT_REPOSITORY_STATE_REVERT;
2701 if (git_path_contains_file(&repo_path, GIT_SEQUENCER_TODO_FILE)) {
2702 state = GIT_REPOSITORY_STATE_REVERT_SEQUENCE;
2703 }
2704 } else if (git_path_contains_file(&repo_path, GIT_CHERRYPICK_HEAD_FILE)) {
2705 state = GIT_REPOSITORY_STATE_CHERRYPICK;
2706 if (git_path_contains_file(&repo_path, GIT_SEQUENCER_TODO_FILE)) {
2707 state = GIT_REPOSITORY_STATE_CHERRYPICK_SEQUENCE;
2708 }
2709 } else if (git_path_contains_file(&repo_path, GIT_BISECT_LOG_FILE))
2710 state = GIT_REPOSITORY_STATE_BISECT;
2711
2712 git_buf_free(&repo_path);
2713 return state;
2714 }
2715
2716 int git_repository__cleanup_files(
2717 git_repository *repo, const char *files[], size_t files_len)
2718 {
2719 git_buf buf = GIT_BUF_INIT;
2720 size_t i;
2721 int error;
2722
2723 for (error = 0, i = 0; !error && i < files_len; ++i) {
2724 const char *path;
2725
2726 if (git_buf_joinpath(&buf, repo->gitdir, files[i]) < 0)
2727 return -1;
2728
2729 path = git_buf_cstr(&buf);
2730
2731 if (git_path_isfile(path)) {
2732 error = p_unlink(path);
2733 } else if (git_path_isdir(path)) {
2734 error = git_futils_rmdir_r(path, NULL,
2735 GIT_RMDIR_REMOVE_FILES | GIT_RMDIR_REMOVE_BLOCKERS);
2736 }
2737
2738 git_buf_clear(&buf);
2739 }
2740
2741 git_buf_free(&buf);
2742 return error;
2743 }
2744
2745 static const char *state_files[] = {
2746 GIT_MERGE_HEAD_FILE,
2747 GIT_MERGE_MODE_FILE,
2748 GIT_MERGE_MSG_FILE,
2749 GIT_REVERT_HEAD_FILE,
2750 GIT_CHERRYPICK_HEAD_FILE,
2751 GIT_BISECT_LOG_FILE,
2752 GIT_REBASE_MERGE_DIR,
2753 GIT_REBASE_APPLY_DIR,
2754 GIT_SEQUENCER_DIR,
2755 };
2756
2757 int git_repository_state_cleanup(git_repository *repo)
2758 {
2759 assert(repo);
2760
2761 return git_repository__cleanup_files(repo, state_files, ARRAY_SIZE(state_files));
2762 }
2763
2764 int git_repository_is_shallow(git_repository *repo)
2765 {
2766 git_buf path = GIT_BUF_INIT;
2767 struct stat st;
2768 int error;
2769
2770 if ((error = git_buf_joinpath(&path, repo->gitdir, "shallow")) < 0)
2771 return error;
2772
2773 error = git_path_lstat(path.ptr, &st);
2774 git_buf_free(&path);
2775
2776 if (error == GIT_ENOTFOUND) {
2777 giterr_clear();
2778 return 0;
2779 }
2780
2781 if (error < 0)
2782 return error;
2783 return st.st_size == 0 ? 0 : 1;
2784 }
2785
2786 int git_repository_init_init_options(
2787 git_repository_init_options *opts, unsigned int version)
2788 {
2789 GIT_INIT_STRUCTURE_FROM_TEMPLATE(
2790 opts, version, git_repository_init_options,
2791 GIT_REPOSITORY_INIT_OPTIONS_INIT);
2792 return 0;
2793 }
2794
2795 int git_repository_ident(const char **name, const char **email, const git_repository *repo)
2796 {
2797 *name = repo->ident_name;
2798 *email = repo->ident_email;
2799
2800 return 0;
2801 }
2802
2803 int git_repository_set_ident(git_repository *repo, const char *name, const char *email)
2804 {
2805 char *tmp_name = NULL, *tmp_email = NULL;
2806
2807 if (name) {
2808 tmp_name = git__strdup(name);
2809 GITERR_CHECK_ALLOC(tmp_name);
2810 }
2811
2812 if (email) {
2813 tmp_email = git__strdup(email);
2814 GITERR_CHECK_ALLOC(tmp_email);
2815 }
2816
2817 tmp_name = git__swap(repo->ident_name, tmp_name);
2818 tmp_email = git__swap(repo->ident_email, tmp_email);
2819
2820 git__free(tmp_name);
2821 git__free(tmp_email);
2822
2823 return 0;
2824 }
2825
2826 int git_repository_submodule_cache_all(git_repository *repo)
2827 {
2828 int error;
2829
2830 assert(repo);
2831
2832 if ((error = git_strmap_alloc(&repo->submodule_cache)))
2833 return error;
2834
2835 error = git_submodule__map(repo, repo->submodule_cache);
2836 return error;
2837 }
2838
2839 int git_repository_submodule_cache_clear(git_repository *repo)
2840 {
2841 git_submodule *sm;
2842 assert(repo);
2843 if (repo->submodule_cache == NULL) {
2844 return 0;
2845 }
2846 git_strmap_foreach_value(repo->submodule_cache, sm, {
2847 git_submodule_free(sm);
2848 });
2849 git_strmap_free(repo->submodule_cache);
2850 repo->submodule_cache = 0;
2851 return 0;
2852 }
The git library used in some Proxmox tool chains