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repository.c
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repository.c
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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "repository.h"
#include <ctype.h>
#include "git2/object.h"
#include "git2/sys/repository.h"
#include "buf.h"
#include "common.h"
#include "commit.h"
#include "grafts.h"
#include "tag.h"
#include "blob.h"
#include "futils.h"
#include "sysdir.h"
#include "filebuf.h"
#include "index.h"
#include "config.h"
#include "refs.h"
#include "filter.h"
#include "odb.h"
#include "refdb.h"
#include "remote.h"
#include "merge.h"
#include "diff_driver.h"
#include "annotated_commit.h"
#include "submodule.h"
#include "worktree.h"
#include "path.h"
#include "strmap.h"
#ifdef GIT_WIN32
# include "win32/w32_util.h"
#endif
bool git_repository__validate_ownership = true;
bool git_repository__fsync_gitdir = false;
static const struct {
git_repository_item_t parent;
git_repository_item_t fallback;
const char *name;
bool directory;
} items[] = {
{ GIT_REPOSITORY_ITEM_GITDIR, GIT_REPOSITORY_ITEM__LAST, NULL, true },
{ GIT_REPOSITORY_ITEM_WORKDIR, GIT_REPOSITORY_ITEM__LAST, NULL, true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM__LAST, NULL, true },
{ GIT_REPOSITORY_ITEM_GITDIR, GIT_REPOSITORY_ITEM__LAST, "index", false },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "objects", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "refs", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "packed-refs", false },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "remotes", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "config", false },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "info", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "hooks", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "logs", true },
{ GIT_REPOSITORY_ITEM_GITDIR, GIT_REPOSITORY_ITEM__LAST, "modules", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "worktrees", true }
};
static int check_repositoryformatversion(int *version, git_config *config);
static int check_extensions(git_config *config, int version);
static int load_global_config(git_config **config, bool use_env);
static int load_objectformat(git_repository *repo, git_config *config);
#define GIT_COMMONDIR_FILE "commondir"
#define GIT_GITDIR_FILE "gitdir"
#define GIT_FILE_CONTENT_PREFIX "gitdir:"
#define GIT_BRANCH_DEFAULT "master"
#define GIT_REPO_VERSION_DEFAULT 0
#define GIT_REPO_VERSION_MAX 1
git_str git_repository__reserved_names_win32[] = {
{ DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
{ GIT_DIR_SHORTNAME, 0, CONST_STRLEN(GIT_DIR_SHORTNAME) }
};
size_t git_repository__reserved_names_win32_len = 2;
git_str git_repository__reserved_names_posix[] = {
{ DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
};
size_t git_repository__reserved_names_posix_len = 1;
static void set_odb(git_repository *repo, git_odb *odb)
{
if (odb) {
GIT_REFCOUNT_OWN(odb, repo);
GIT_REFCOUNT_INC(odb);
}
if ((odb = git_atomic_swap(repo->_odb, odb)) != NULL) {
GIT_REFCOUNT_OWN(odb, NULL);
git_odb_free(odb);
}
}
static void set_refdb(git_repository *repo, git_refdb *refdb)
{
if (refdb) {
GIT_REFCOUNT_OWN(refdb, repo);
GIT_REFCOUNT_INC(refdb);
}
if ((refdb = git_atomic_swap(repo->_refdb, refdb)) != NULL) {
GIT_REFCOUNT_OWN(refdb, NULL);
git_refdb_free(refdb);
}
}
static void set_config(git_repository *repo, git_config *config)
{
if (config) {
GIT_REFCOUNT_OWN(config, repo);
GIT_REFCOUNT_INC(config);
}
if ((config = git_atomic_swap(repo->_config, config)) != NULL) {
GIT_REFCOUNT_OWN(config, NULL);
git_config_free(config);
}
git_repository__configmap_lookup_cache_clear(repo);
}
static void set_index(git_repository *repo, git_index *index)
{
if (index) {
GIT_REFCOUNT_OWN(index, repo);
GIT_REFCOUNT_INC(index);
}
if ((index = git_atomic_swap(repo->_index, index)) != NULL) {
GIT_REFCOUNT_OWN(index, NULL);
git_index_free(index);
}
}
int git_repository__cleanup(git_repository *repo)
{
GIT_ASSERT_ARG(repo);
git_repository_submodule_cache_clear(repo);
git_cache_clear(&repo->objects);
git_attr_cache_flush(repo);
git_grafts_free(repo->grafts);
repo->grafts = NULL;
git_grafts_free(repo->shallow_grafts);
repo->shallow_grafts = NULL;
set_config(repo, NULL);
set_index(repo, NULL);
set_odb(repo, NULL);
set_refdb(repo, NULL);
return 0;
}
void git_repository_free(git_repository *repo)
{
size_t i;
if (repo == NULL)
return;
git_repository__cleanup(repo);
git_cache_dispose(&repo->objects);
git_diff_driver_registry_free(repo->diff_drivers);
repo->diff_drivers = NULL;
for (i = 0; i < repo->reserved_names.size; i++)
git_str_dispose(git_array_get(repo->reserved_names, i));
git_array_clear(repo->reserved_names);
git__free(repo->gitlink);
git__free(repo->gitdir);
git__free(repo->commondir);
git__free(repo->workdir);
git__free(repo->namespace);
git__free(repo->ident_name);
git__free(repo->ident_email);
git__memzero(repo, sizeof(*repo));
git__free(repo);
}
/* Check if we have a separate commondir (e.g. we have a worktree) */
static int lookup_commondir(
bool *separate,
git_str *commondir,
git_str *repository_path,
uint32_t flags)
{
git_str common_link = GIT_STR_INIT;
int error;
/* Environment variable overrides configuration */
if ((flags & GIT_REPOSITORY_OPEN_FROM_ENV)) {
error = git__getenv(commondir, "GIT_COMMON_DIR");
if (!error || error != GIT_ENOTFOUND)
goto done;
}
/*
* If there's no commondir file, the repository path is the
* common path, but it needs a trailing slash.
*/
if (!git_fs_path_contains_file(repository_path, GIT_COMMONDIR_FILE)) {
if ((error = git_str_set(commondir, repository_path->ptr, repository_path->size)) == 0)
error = git_fs_path_to_dir(commondir);
*separate = false;
goto done;
}
*separate = true;
if ((error = git_str_joinpath(&common_link, repository_path->ptr, GIT_COMMONDIR_FILE)) < 0 ||
(error = git_futils_readbuffer(&common_link, common_link.ptr)) < 0)
goto done;
git_str_rtrim(&common_link);
if (git_fs_path_is_relative(common_link.ptr)) {
if ((error = git_str_joinpath(commondir, repository_path->ptr, common_link.ptr)) < 0)
goto done;
} else {
git_str_swap(commondir, &common_link);
}
/* Make sure the commondir path always has a trailing slash */
error = git_fs_path_prettify_dir(commondir, commondir->ptr, NULL);
done:
git_str_dispose(&common_link);
return error;
}
GIT_INLINE(int) validate_repo_path(git_str *path)
{
/*
* The longest static path in a repository (or commondir) is the
* packed refs file. (Loose refs may be longer since they
* include the reference name, but will be validated when the
* path is constructed.)
*/
static size_t suffix_len =
CONST_STRLEN("objects/pack/pack-.pack.lock") +
GIT_OID_MAX_HEXSIZE;
return git_fs_path_validate_str_length_with_suffix(
path, suffix_len);
}
/*
* Git repository open methods
*
* Open a repository object from its path
*/
static int is_valid_repository_path(
bool *out,
git_str *repository_path,
git_str *common_path,
uint32_t flags)
{
bool separate_commondir = false;
int error;
*out = false;
if ((error = lookup_commondir(&separate_commondir,
common_path, repository_path, flags)) < 0)
return error;
/* Ensure HEAD file exists */
if (git_fs_path_contains_file(repository_path, GIT_HEAD_FILE) == false)
return 0;
/* Check files in common dir */
if (git_fs_path_contains_dir(common_path, GIT_OBJECTS_DIR) == false)
return 0;
if (git_fs_path_contains_dir(common_path, GIT_REFS_DIR) == false)
return 0;
/* Ensure the repo (and commondir) are valid paths */
if ((error = validate_repo_path(common_path)) < 0 ||
(separate_commondir &&
(error = validate_repo_path(repository_path)) < 0))
return error;
*out = true;
return 0;
}
static git_repository *repository_alloc(void)
{
git_repository *repo = git__calloc(1, sizeof(git_repository));
if (repo == NULL ||
git_cache_init(&repo->objects) < 0)
goto on_error;
git_array_init_to_size(repo->reserved_names, 4);
if (!repo->reserved_names.ptr)
goto on_error;
/* set all the entries in the configmap cache to `unset` */
git_repository__configmap_lookup_cache_clear(repo);
return repo;
on_error:
if (repo)
git_cache_dispose(&repo->objects);
git__free(repo);
return NULL;
}
int git_repository_new(git_repository **out)
{
git_repository *repo;
*out = repo = repository_alloc();
GIT_ERROR_CHECK_ALLOC(repo);
repo->is_bare = 1;
repo->is_worktree = 0;
return 0;
}
static int load_config_data(git_repository *repo, const git_config *config)
{
int is_bare;
int err = git_config_get_bool(&is_bare, config, "core.bare");
if (err < 0 && err != GIT_ENOTFOUND)
return err;
/* Try to figure out if it's bare, default to non-bare if it's not set */
if (err != GIT_ENOTFOUND)
repo->is_bare = is_bare && !repo->is_worktree;
else
repo->is_bare = 0;
return 0;
}
static int load_workdir(
git_repository *repo,
git_config *config,
git_str *parent_path)
{
git_config_entry *ce = NULL;
git_str worktree = GIT_STR_INIT;
git_str path = GIT_STR_INIT;
git_str workdir_env = GIT_STR_INIT;
const char *value = NULL;
int error;
if (repo->is_bare)
return 0;
/* Environment variables are preferred */
if (repo->use_env) {
error = git__getenv(&workdir_env, "GIT_WORK_TREE");
if (error == 0)
value = workdir_env.ptr;
else if (error == GIT_ENOTFOUND)
error = 0;
else
goto cleanup;
}
/* Examine configuration values if necessary */
if (!value) {
if ((error = git_config__lookup_entry(&ce, config,
"core.worktree", false)) < 0)
return error;
if (ce && ce->value)
value = ce->value;
}
if (repo->is_worktree) {
char *gitlink = git_worktree__read_link(repo->gitdir, GIT_GITDIR_FILE);
if (!gitlink) {
error = -1;
goto cleanup;
}
git_str_attach(&worktree, gitlink, 0);
if ((git_fs_path_dirname_r(&worktree, worktree.ptr)) < 0 ||
git_fs_path_to_dir(&worktree) < 0) {
error = -1;
goto cleanup;
}
repo->workdir = git_str_detach(&worktree);
} else if (value) {
if (!*value) {
git_error_set(GIT_ERROR_NET, "working directory cannot be set to empty path");
error = -1;
goto cleanup;
}
if ((error = git_fs_path_prettify_dir(&worktree,
value, repo->gitdir)) < 0)
goto cleanup;
repo->workdir = git_str_detach(&worktree);
} else if (parent_path && git_fs_path_isdir(parent_path->ptr)) {
repo->workdir = git_str_detach(parent_path);
} else {
if (git_fs_path_dirname_r(&worktree, repo->gitdir) < 0 ||
git_fs_path_to_dir(&worktree) < 0) {
error = -1;
goto cleanup;
}
repo->workdir = git_str_detach(&worktree);
}
GIT_ERROR_CHECK_ALLOC(repo->workdir);
cleanup:
git_str_dispose(&path);
git_str_dispose(&workdir_env);
git_config_entry_free(ce);
return error;
}
/*
* This function returns furthest offset into path where a ceiling dir
* is found, so we can stop processing the path at that point.
*
* Note: converting this to use git_strs instead of GIT_PATH_MAX buffers on
* the stack could remove directories name limits, but at the cost of doing
* repeated malloc/frees inside the loop below, so let's not do it now.
*/
static size_t find_ceiling_dir_offset(
const char *path,
const char *ceiling_directories)
{
char buf[GIT_PATH_MAX + 1];
char buf2[GIT_PATH_MAX + 1];
const char *ceil, *sep;
size_t len, max_len = 0, min_len;
GIT_ASSERT_ARG(path);
min_len = (size_t)(git_fs_path_root(path) + 1);
if (ceiling_directories == NULL || min_len == 0)
return min_len;
for (sep = ceil = ceiling_directories; *sep; ceil = sep + 1) {
for (sep = ceil; *sep && *sep != GIT_PATH_LIST_SEPARATOR; sep++);
len = sep - ceil;
if (len == 0 || len >= sizeof(buf) || git_fs_path_root(ceil) == -1)
continue;
strncpy(buf, ceil, len);
buf[len] = '\0';
if (p_realpath(buf, buf2) == NULL)
continue;
len = strlen(buf2);
if (len > 0 && buf2[len-1] == '/')
buf[--len] = '\0';
if (!strncmp(path, buf2, len) &&
(path[len] == '/' || !path[len]) &&
len > max_len)
{
max_len = len;
}
}
return (max_len <= min_len ? min_len : max_len);
}
/*
* Read the contents of `file_path` and set `path_out` to the repo dir that
* it points to. Before calling, set `path_out` to the base directory that
* should be used if the contents of `file_path` are a relative path.
*/
static int read_gitfile(git_str *path_out, const char *file_path)
{
int error = 0;
git_str file = GIT_STR_INIT;
size_t prefix_len = strlen(GIT_FILE_CONTENT_PREFIX);
GIT_ASSERT_ARG(path_out);
GIT_ASSERT_ARG(file_path);
if (git_futils_readbuffer(&file, file_path) < 0)
return -1;
git_str_rtrim(&file);
/* apparently on Windows, some people use backslashes in paths */
git_fs_path_mkposix(file.ptr);
if (git_str_len(&file) <= prefix_len ||
memcmp(git_str_cstr(&file), GIT_FILE_CONTENT_PREFIX, prefix_len) != 0)
{
git_error_set(GIT_ERROR_REPOSITORY,
"the `.git` file at '%s' is malformed", file_path);
error = -1;
}
else if ((error = git_fs_path_dirname_r(path_out, file_path)) >= 0) {
const char *gitlink = git_str_cstr(&file) + prefix_len;
while (*gitlink && git__isspace(*gitlink)) gitlink++;
error = git_fs_path_prettify_dir(
path_out, gitlink, git_str_cstr(path_out));
}
git_str_dispose(&file);
return error;
}
typedef struct {
const char *repo_path;
git_str tmp;
bool *is_safe;
} validate_ownership_data;
static int validate_ownership_cb(const git_config_entry *entry, void *payload)
{
validate_ownership_data *data = payload;
if (strcmp(entry->value, "") == 0) {
*data->is_safe = false;
} else if (strcmp(entry->value, "*") == 0) {
*data->is_safe = true;
} else {
const char *test_path = entry->value;
#ifdef GIT_WIN32
/*
* Git for Windows does some truly bizarre things with
* paths that start with a forward slash; and expects you
* to escape that with `%(prefix)`. This syntax generally
* means to add the prefix that Git was installed to -- eg
* `/usr/local` -- unless it's an absolute path, in which
* case the leading `%(prefix)/` is just removed. And Git
* for Windows expects you to use this syntax for absolute
* Unix-style paths (in "Git Bash" or Windows Subsystem for
* Linux).
*
* Worse, the behavior used to be that a leading `/` was
* not absolute. It would indicate that Git for Windows
* should add the prefix. So `//` is required for absolute
* Unix-style paths. Yes, this is truly horrifying.
*
* Emulate that behavior, I guess, but only for absolute
* paths. We won't deal with the Git install prefix. Also,
* give WSL users an escape hatch where they don't have to
* think about this and can use the literal path that the
* filesystem APIs provide (`//wsl.localhost/...`).
*/
if (strncmp(test_path, "%(prefix)//", strlen("%(prefix)//")) == 0)
test_path += strlen("%(prefix)/");
else if (strncmp(test_path, "//", 2) == 0 &&
strncmp(test_path, "//wsl.localhost/", strlen("//wsl.localhost/")) != 0)
test_path++;
#endif
if (git_fs_path_prettify_dir(&data->tmp, test_path, NULL) == 0 &&
strcmp(data->tmp.ptr, data->repo_path) == 0)
*data->is_safe = true;
}
return 0;
}
static int validate_ownership_config(
bool *is_safe,
const char *path,
bool use_env)
{
validate_ownership_data ownership_data = {
path, GIT_STR_INIT, is_safe
};
git_config *config;
int error;
if (load_global_config(&config, use_env) != 0)
return 0;
error = git_config_get_multivar_foreach(config,
"safe.directory", NULL,
validate_ownership_cb,
&ownership_data);
if (error == GIT_ENOTFOUND)
error = 0;
git_config_free(config);
git_str_dispose(&ownership_data.tmp);
return error;
}
static int validate_ownership_path(bool *is_safe, const char *path)
{
git_fs_path_owner_t owner_level =
GIT_FS_PATH_OWNER_CURRENT_USER |
GIT_FS_PATH_USER_IS_ADMINISTRATOR |
GIT_FS_PATH_OWNER_RUNNING_SUDO;
int error = 0;
if (path)
error = git_fs_path_owner_is(is_safe, path, owner_level);
if (error == GIT_ENOTFOUND) {
*is_safe = true;
error = 0;
} else if (error == GIT_EINVALID) {
*is_safe = false;
error = 0;
}
return error;
}
#ifdef __ANDROID__
static int validate_ownership(git_repository *repo) {
return 0;
}
#else
static int validate_ownership(git_repository *repo)
{
const char *validation_paths[3] = { NULL }, *path;
size_t validation_len = 0, i;
bool is_safe = false;
int error = 0;
/*
* If there's a worktree, validate the permissions to it *and*
* the git directory, and use the worktree as the configuration
* key for allowlisting the directory. In a bare setup, only
* look at the gitdir and use that as the allowlist. So we
* examine all `validation_paths` but use only the first as
* the configuration lookup.
*/
if (repo->workdir)
validation_paths[validation_len++] = repo->workdir;
if (repo->gitlink)
validation_paths[validation_len++] = repo->gitlink;
validation_paths[validation_len++] = repo->gitdir;
for (i = 0; i < validation_len; i++) {
path = validation_paths[i];
if ((error = validate_ownership_path(&is_safe, path)) < 0)
goto done;
if (!is_safe)
break;
}
if (is_safe ||
(error = validate_ownership_config(
&is_safe, validation_paths[0], repo->use_env)) < 0)
goto done;
if (!is_safe) {
git_error_set(GIT_ERROR_CONFIG,
"repository path '%s' is not owned by current user",
path);
error = GIT_EOWNER;
}
done:
return error;
}
#endif
struct repo_paths {
git_str gitdir;
git_str workdir;
git_str gitlink;
git_str commondir;
};
#define REPO_PATHS_INIT { GIT_STR_INIT }
GIT_INLINE(void) repo_paths_dispose(struct repo_paths *paths)
{
git_str_dispose(&paths->gitdir);
git_str_dispose(&paths->workdir);
git_str_dispose(&paths->gitlink);
git_str_dispose(&paths->commondir);
}
static int find_repo_traverse(
struct repo_paths *out,
const char *start_path,
const char *ceiling_dirs,
uint32_t flags)
{
git_str path = GIT_STR_INIT;
git_str repo_link = GIT_STR_INIT;
git_str common_link = GIT_STR_INIT;
struct stat st;
dev_t initial_device = 0;
int min_iterations;
bool in_dot_git, is_valid;
size_t ceiling_offset = 0;
int error;
git_str_clear(&out->gitdir);
if ((error = git_fs_path_prettify(&path, start_path, NULL)) < 0)
return error;
/*
* In each loop we look first for a `.git` dir within the
* directory, then to see if the directory itself is a repo.
*
* In other words: if we start in /a/b/c, then we look at:
* /a/b/c/.git, /a/b/c, /a/b/.git, /a/b, /a/.git, /a
*
* With GIT_REPOSITORY_OPEN_BARE or GIT_REPOSITORY_OPEN_NO_DOTGIT,
* we assume we started with /a/b/c.git and don't append .git the
* first time through. min_iterations indicates the number of
* iterations left before going further counts as a search.
*/
if (flags & (GIT_REPOSITORY_OPEN_BARE | GIT_REPOSITORY_OPEN_NO_DOTGIT)) {
in_dot_git = true;
min_iterations = 1;
} else {
in_dot_git = false;
min_iterations = 2;
}
for (;;) {
if (!(flags & GIT_REPOSITORY_OPEN_NO_DOTGIT)) {
if (!in_dot_git) {
if ((error = git_str_joinpath(&path, path.ptr, DOT_GIT)) < 0)
goto out;
}
in_dot_git = !in_dot_git;
}
if (p_stat(path.ptr, &st) == 0) {
/* check that we have not crossed device boundaries */
if (initial_device == 0)
initial_device = st.st_dev;
else if (st.st_dev != initial_device &&
!(flags & GIT_REPOSITORY_OPEN_CROSS_FS))
break;
if (S_ISDIR(st.st_mode)) {
if ((error = is_valid_repository_path(&is_valid, &path, &common_link, flags)) < 0)
goto out;
if (is_valid) {
if ((error = git_fs_path_to_dir(&path)) < 0 ||
(error = git_str_set(&out->gitdir, path.ptr, path.size)) < 0)
goto out;
if ((error = git_str_attach(&out->gitlink, git_worktree__read_link(path.ptr, GIT_GITDIR_FILE), 0)) < 0)
goto out;
git_str_swap(&common_link, &out->commondir);
break;
}
} else if (S_ISREG(st.st_mode) && git__suffixcmp(path.ptr, "/" DOT_GIT) == 0) {
if ((error = read_gitfile(&repo_link, path.ptr)) < 0 ||
(error = is_valid_repository_path(&is_valid, &repo_link, &common_link, flags)) < 0)
goto out;
if (is_valid) {
git_str_swap(&out->gitdir, &repo_link);
if ((error = git_str_put(&out->gitlink, path.ptr, path.size)) < 0)
goto out;
git_str_swap(&common_link, &out->commondir);
}
break;
}
}
/*
* Move up one directory. If we're in_dot_git, we'll
* search the parent itself next. If we're !in_dot_git,
* we'll search .git in the parent directory next (added
* at the top of the loop).
*/
if ((error = git_fs_path_dirname_r(&path, path.ptr)) < 0)
goto out;
/*
* Once we've checked the directory (and .git if
* applicable), find the ceiling for a search.
*/
if (min_iterations && (--min_iterations == 0))
ceiling_offset = find_ceiling_dir_offset(path.ptr, ceiling_dirs);
/* Check if we should stop searching here. */
if (min_iterations == 0 &&
(path.ptr[ceiling_offset] == 0 || (flags & GIT_REPOSITORY_OPEN_NO_SEARCH)))
break;
}
if (!(flags & GIT_REPOSITORY_OPEN_BARE)) {
if (!git_str_len(&out->gitdir))
git_str_clear(&out->workdir);
else if ((error = git_fs_path_dirname_r(&out->workdir, path.ptr)) < 0 ||
(error = git_fs_path_to_dir(&out->workdir)) < 0)
goto out;
}
/* If we didn't find the repository, and we don't have any other
* error to report, report that. */
if (!git_str_len(&out->gitdir)) {
git_error_set(GIT_ERROR_REPOSITORY, "could not find repository at '%s'", start_path);
error = GIT_ENOTFOUND;
goto out;
}
out:
if (error)
repo_paths_dispose(out);
git_str_dispose(&path);
git_str_dispose(&repo_link);
git_str_dispose(&common_link);
return error;
}
static int load_grafts(git_repository *repo)
{
git_str path = GIT_STR_INIT;
int error;
if ((error = git_repository__item_path(&path, repo, GIT_REPOSITORY_ITEM_INFO)) < 0 ||
(error = git_str_joinpath(&path, path.ptr, "grafts")) < 0 ||
(error = git_grafts_open_or_refresh(&repo->grafts, path.ptr, repo->oid_type)) < 0)
goto error;
git_str_clear(&path);
if ((error = git_str_joinpath(&path, repo->gitdir, "shallow")) < 0 ||
(error = git_grafts_open_or_refresh(&repo->shallow_grafts, path.ptr, repo->oid_type)) < 0)
goto error;
error:
git_str_dispose(&path);
return error;
}
static int find_repo(
struct repo_paths *out,
const char *start_path,
const char *ceiling_dirs,
uint32_t flags)
{
bool use_env = !!(flags & GIT_REPOSITORY_OPEN_FROM_ENV);
git_str gitdir_buf = GIT_STR_INIT,
ceiling_dirs_buf = GIT_STR_INIT,
across_fs_buf = GIT_STR_INIT;
int error;
if (use_env && !start_path) {
error = git__getenv(&gitdir_buf, "GIT_DIR");
if (!error) {
start_path = gitdir_buf.ptr;
flags |= GIT_REPOSITORY_OPEN_NO_SEARCH;
flags |= GIT_REPOSITORY_OPEN_NO_DOTGIT;
} else if (error == GIT_ENOTFOUND) {
start_path = ".";
} else {
goto done;
}
}
if (use_env && !ceiling_dirs) {
error = git__getenv(&ceiling_dirs_buf,
"GIT_CEILING_DIRECTORIES");
if (!error)
ceiling_dirs = ceiling_dirs_buf.ptr;
else if (error != GIT_ENOTFOUND)
goto done;
}
if (use_env) {
error = git__getenv(&across_fs_buf,
"GIT_DISCOVERY_ACROSS_FILESYSTEM");
if (!error) {
int across_fs = 0;
if ((error = git_config_parse_bool(&across_fs,
git_str_cstr(&across_fs_buf))) < 0)
goto done;
if (across_fs)
flags |= GIT_REPOSITORY_OPEN_CROSS_FS;
} else if (error != GIT_ENOTFOUND) {
goto done;
}
}
error = find_repo_traverse(out, start_path, ceiling_dirs, flags);
done:
git_str_dispose(&gitdir_buf);
git_str_dispose(&ceiling_dirs_buf);
git_str_dispose(&across_fs_buf);
return error;
}
static int obtain_config_and_set_oid_type(
git_config **config_ptr,
git_repository *repo)
{
int error;
git_config *config = NULL;
int version = 0;
/*
* We'd like to have the config, but git doesn't particularly
* care if it's not there, so we need to deal with that.
*/
error = git_repository_config_snapshot(&config, repo);
if (error < 0 && error != GIT_ENOTFOUND)
goto out;
if (config &&
(error = check_repositoryformatversion(&version, config)) < 0)
goto out;
if ((error = check_extensions(config, version)) < 0)
goto out;
if (version > 0) {
if ((error = load_objectformat(repo, config)) < 0)
goto out;
} else {
repo->oid_type = GIT_OID_DEFAULT;
}
out:
*config_ptr = config;
return error;
}
int git_repository_open_bare(
git_repository **repo_ptr,
const char *bare_path)
{
git_str path = GIT_STR_INIT, common_path = GIT_STR_INIT;
git_repository *repo = NULL;
bool is_valid;
int error;
git_config *config;
if ((error = git_fs_path_prettify_dir(&path, bare_path, NULL)) < 0 ||
(error = is_valid_repository_path(&is_valid, &path, &common_path, 0)) < 0)
return error;
if (!is_valid) {
git_str_dispose(&path);
git_str_dispose(&common_path);
git_error_set(GIT_ERROR_REPOSITORY, "path is not a repository: %s", bare_path);
return GIT_ENOTFOUND;
}
repo = repository_alloc();
GIT_ERROR_CHECK_ALLOC(repo);