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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 <ctype.h>
#include "git2/object.h"
#include "git2/refdb.h"
#include "git2/sys/repository.h"
#include "common.h"
#include "repository.h"
#include "commit.h"
#include "tag.h"
#include "blob.h"
#include "fileops.h"
#include "sysdir.h"
#include "filebuf.h"
#include "index.h"
#include "config.h"
#include "refs.h"
#include "filter.h"
#include "odb.h"
#include "remote.h"
#include "merge.h"
#include "diff_driver.h"
#include "annotated_commit.h"
#include "submodule.h"
#include "worktree.h"
#include "strmap.h"
#ifdef GIT_WIN32
# include "win32/w32_util.h"
#endif
static const struct {
git_repository_item_t parent;
const char *name;
bool directory;
} items[] = {
{ GIT_REPOSITORY_ITEM_GITDIR, NULL, true },
{ GIT_REPOSITORY_ITEM_WORKDIR, NULL, true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, NULL, true },
{ GIT_REPOSITORY_ITEM_GITDIR, "index", false },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "objects", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "refs", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "packed-refs", false },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "remotes", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "config", false },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "info", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "hooks", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "logs", true },
{ GIT_REPOSITORY_ITEM_GITDIR, "modules", true },
{ GIT_REPOSITORY_ITEM_COMMONDIR, "worktrees", true }
};
static int check_repositoryformatversion(git_config *config);
#define GIT_COMMONDIR_FILE "commondir"
#define GIT_GITDIR_FILE "gitdir"
#define GIT_FILE_CONTENT_PREFIX "gitdir:"
#define GIT_BRANCH_MASTER "master"
#define GIT_REPO_VERSION 0
git_buf 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_buf 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__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__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__swap(repo->_config, config)) != NULL) {
GIT_REFCOUNT_OWN(config, NULL);
git_config_free(config);
}
git_repository__cvar_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__swap(repo->_index, index)) != NULL) {
GIT_REFCOUNT_OWN(index, NULL);
git_index_free(index);
}
}
void git_repository__cleanup(git_repository *repo)
{
assert(repo);
git_repository_submodule_cache_clear(repo);
git_cache_clear(&repo->objects);
git_attr_cache_flush(repo);
set_config(repo, NULL);
set_index(repo, NULL);
set_odb(repo, NULL);
set_refdb(repo, NULL);
}
void git_repository_free(git_repository *repo)
{
size_t i;
if (repo == NULL)
return;
git_repository__cleanup(repo);
git_cache_free(&repo->objects);
git_diff_driver_registry_free(repo->diff_drivers);
repo->diff_drivers = NULL;
for (i = 0; i < repo->reserved_names.size; i++)
git_buf_free(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);
}
/*
* Git repository open methods
*
* Open a repository object from its path
*/
static bool valid_repository_path(git_buf *repository_path, git_buf *common_path)
{
/* Check if we have a separate commondir (e.g. we have a
* worktree) */
if (git_path_contains_file(repository_path, GIT_COMMONDIR_FILE)) {
git_buf common_link = GIT_BUF_INIT;
git_buf_joinpath(&common_link, repository_path->ptr, GIT_COMMONDIR_FILE);
git_futils_readbuffer(&common_link, common_link.ptr);
git_buf_rtrim(&common_link);
if (git_path_is_relative(common_link.ptr)) {
git_buf_joinpath(common_path, repository_path->ptr, common_link.ptr);
} else {
git_buf_swap(common_path, &common_link);
}
git_buf_free(&common_link);
}
else {
git_buf_set(common_path, repository_path->ptr, repository_path->size);
}
/* Make sure the commondir path always has a trailing * slash */
if (git_buf_rfind(common_path, '/') != (ssize_t)common_path->size - 1)
git_buf_putc(common_path, '/');
/* Ensure HEAD file exists */
if (git_path_contains_file(repository_path, GIT_HEAD_FILE) == false)
return false;
/* Check files in common dir */
if (git_path_contains_dir(common_path, GIT_OBJECTS_DIR) == false)
return false;
if (git_path_contains_dir(common_path, GIT_REFS_DIR) == false)
return false;
return true;
}
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 cvar cache to `unset` */
git_repository__cvar_cache_clear(repo);
return repo;
on_error:
if (repo)
git_cache_free(&repo->objects);
git__free(repo);
return NULL;
}
int git_repository_new(git_repository **out)
{
git_repository *repo;
*out = repo = repository_alloc();
GITERR_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;
/* Try to figure out if it's bare, default to non-bare if it's not set */
if (git_config_get_bool(&is_bare, config, "core.bare") < 0)
repo->is_bare = 0;
else
repo->is_bare = is_bare;
return 0;
}
static int load_workdir(git_repository *repo, git_config *config, git_buf *parent_path)
{
int error;
git_config_entry *ce;
git_buf worktree = GIT_BUF_INIT;
git_buf path = GIT_BUF_INIT;
if (repo->is_bare)
return 0;
if ((error = git_config__lookup_entry(
&ce, config, "core.worktree", false)) < 0)
return error;
if (repo->is_worktree) {
char *gitlink = git_worktree__read_link(repo->gitdir, GIT_GITDIR_FILE);
if (!gitlink) {
error = -1;
goto cleanup;
}
git_buf_attach(&worktree, gitlink, 0);
if ((git_path_dirname_r(&worktree, worktree.ptr)) < 0 ||
git_path_to_dir(&worktree) < 0) {
error = -1;
goto cleanup;
}
repo->workdir = git_buf_detach(&worktree);
}
else if (ce && ce->value) {
if ((error = git_path_prettify_dir(
&worktree, ce->value, repo->gitdir)) < 0)
goto cleanup;
repo->workdir = git_buf_detach(&worktree);
}
else if (parent_path && git_path_isdir(parent_path->ptr))
repo->workdir = git_buf_detach(parent_path);
else {
if (git_path_dirname_r(&worktree, repo->gitdir) < 0 ||
git_path_to_dir(&worktree) < 0) {
error = -1;
goto cleanup;
}
repo->workdir = git_buf_detach(&worktree);
}
GITERR_CHECK_ALLOC(repo->workdir);
cleanup:
git_buf_free(&path);
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_bufs 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;
assert(path);
min_len = (size_t)(git_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_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_buf *path_out, const char *file_path)
{
int error = 0;
git_buf file = GIT_BUF_INIT;
size_t prefix_len = strlen(GIT_FILE_CONTENT_PREFIX);
assert(path_out && file_path);
if (git_futils_readbuffer(&file, file_path) < 0)
return -1;
git_buf_rtrim(&file);
/* apparently on Windows, some people use backslashes in paths */
git_path_mkposix(file.ptr);
if (git_buf_len(&file) <= prefix_len ||
memcmp(git_buf_cstr(&file), GIT_FILE_CONTENT_PREFIX, prefix_len) != 0)
{
giterr_set(GITERR_REPOSITORY,
"the `.git` file at '%s' is malformed", file_path);
error = -1;
}
else if ((error = git_path_dirname_r(path_out, file_path)) >= 0) {
const char *gitlink = git_buf_cstr(&file) + prefix_len;
while (*gitlink && git__isspace(*gitlink)) gitlink++;
error = git_path_prettify_dir(
path_out, gitlink, git_buf_cstr(path_out));
}
git_buf_free(&file);
return error;
}
static int find_repo(
git_buf *repo_path,
git_buf *parent_path,
git_buf *link_path,
git_buf *common_path,
const char *start_path,
uint32_t flags,
const char *ceiling_dirs)
{
int error;
git_buf path = GIT_BUF_INIT;
git_buf repo_link = GIT_BUF_INIT;
git_buf common_link = GIT_BUF_INIT;
struct stat st;
dev_t initial_device = 0;
int min_iterations;
bool in_dot_git;
size_t ceiling_offset = 0;
git_buf_free(repo_path);
error = git_path_prettify(&path, start_path, NULL);
if (error < 0)
return error;
/* in_dot_git toggles each loop:
* /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) {
error = git_buf_joinpath(&path, path.ptr, DOT_GIT);
if (error < 0)
break;
}
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 (valid_repository_path(&path, &common_link)) {
git_path_to_dir(&path);
git_buf_set(repo_path, path.ptr, path.size);
if (link_path)
git_buf_attach(link_path,
git_worktree__read_link(path.ptr, GIT_GITDIR_FILE), 0);
if (common_path)
git_buf_swap(&common_link, common_path);
break;
}
}
else if (S_ISREG(st.st_mode) && git__suffixcmp(path.ptr, "/" DOT_GIT) == 0) {
error = read_gitfile(&repo_link, path.ptr);
if (error < 0)
break;
if (valid_repository_path(&repo_link, &common_link)) {
git_buf_swap(repo_path, &repo_link);
if (link_path)
error = git_buf_put(link_path, path.ptr, path.size);
if (common_path)
git_buf_swap(&common_link, common_path);
}
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 (git_path_dirname_r(&path, path.ptr) < 0) {
error = -1;
break;
}
/* 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 (!error && parent_path && !(flags & GIT_REPOSITORY_OPEN_BARE)) {
if (!git_buf_len(repo_path))
git_buf_clear(parent_path);
else {
git_path_dirname_r(parent_path, path.ptr);
git_path_to_dir(parent_path);
}
if (git_buf_oom(parent_path))
return -1;
}
/* If we didn't find the repository, and we don't have any other error
* to report, report that. */
if (!git_buf_len(repo_path) && !error) {
giterr_set(GITERR_REPOSITORY,
"could not find repository from '%s'", start_path);
error = GIT_ENOTFOUND;
}
git_buf_free(&path);
git_buf_free(&repo_link);
git_buf_free(&common_link);
return error;
}
int git_repository_open_bare(
git_repository **repo_ptr,
const char *bare_path)
{
int error;
git_buf path = GIT_BUF_INIT, common_path = GIT_BUF_INIT;
git_repository *repo = NULL;
if ((error = git_path_prettify_dir(&path, bare_path, NULL)) < 0)
return error;
if (!valid_repository_path(&path, &common_path)) {
git_buf_free(&path);
git_buf_free(&common_path);
giterr_set(GITERR_REPOSITORY, "path is not a repository: %s", bare_path);
return GIT_ENOTFOUND;
}
repo = repository_alloc();
GITERR_CHECK_ALLOC(repo);
repo->gitdir = git_buf_detach(&path);
GITERR_CHECK_ALLOC(repo->gitdir);
repo->commondir = git_buf_detach(&common_path);
GITERR_CHECK_ALLOC(repo->commondir);
/* of course we're bare! */
repo->is_bare = 1;
repo->is_worktree = 0;
repo->workdir = NULL;
*repo_ptr = repo;
return 0;
}
static int _git_repository_open_ext_from_env(
git_repository **out,
const char *start_path)
{
git_repository *repo = NULL;
git_index *index = NULL;
git_odb *odb = NULL;
git_buf dir_buf = GIT_BUF_INIT;
git_buf ceiling_dirs_buf = GIT_BUF_INIT;
git_buf across_fs_buf = GIT_BUF_INIT;
git_buf index_file_buf = GIT_BUF_INIT;
git_buf namespace_buf = GIT_BUF_INIT;
git_buf object_dir_buf = GIT_BUF_INIT;
git_buf alts_buf = GIT_BUF_INIT;
git_buf work_tree_buf = GIT_BUF_INIT;
git_buf common_dir_buf = GIT_BUF_INIT;
const char *ceiling_dirs = NULL;
unsigned flags = 0;
int error;
if (!start_path) {
error = git__getenv(&dir_buf, "GIT_DIR");
if (error == GIT_ENOTFOUND) {
giterr_clear();
start_path = ".";
} else if (error < 0)
goto error;
else {
start_path = git_buf_cstr(&dir_buf);
flags |= GIT_REPOSITORY_OPEN_NO_SEARCH;
flags |= GIT_REPOSITORY_OPEN_NO_DOTGIT;
}
}
error = git__getenv(&ceiling_dirs_buf, "GIT_CEILING_DIRECTORIES");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
else
ceiling_dirs = git_buf_cstr(&ceiling_dirs_buf);
error = git__getenv(&across_fs_buf, "GIT_DISCOVERY_ACROSS_FILESYSTEM");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
else {
int across_fs = 0;
error = git_config_parse_bool(&across_fs, git_buf_cstr(&across_fs_buf));
if (error < 0)
goto error;
if (across_fs)
flags |= GIT_REPOSITORY_OPEN_CROSS_FS;
}
error = git__getenv(&index_file_buf, "GIT_INDEX_FILE");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
else {
error = git_index_open(&index, git_buf_cstr(&index_file_buf));
if (error < 0)
goto error;
}
error = git__getenv(&namespace_buf, "GIT_NAMESPACE");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
error = git__getenv(&object_dir_buf, "GIT_OBJECT_DIRECTORY");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
else {
error = git_odb_open(&odb, git_buf_cstr(&object_dir_buf));
if (error < 0)
goto error;
}
error = git__getenv(&work_tree_buf, "GIT_WORK_TREE");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
else {
giterr_set(GITERR_INVALID, "GIT_WORK_TREE unimplemented");
error = GIT_ERROR;
goto error;
}
error = git__getenv(&work_tree_buf, "GIT_COMMON_DIR");
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error < 0)
goto error;
else {
giterr_set(GITERR_INVALID, "GIT_COMMON_DIR unimplemented");
error = GIT_ERROR;
goto error;
}
error = git_repository_open_ext(&repo, start_path, flags, ceiling_dirs);
if (error < 0)
goto error;
if (odb)
git_repository_set_odb(repo, odb);
error = git__getenv(&alts_buf, "GIT_ALTERNATE_OBJECT_DIRECTORIES");
if (error == GIT_ENOTFOUND) {
giterr_clear();
error = 0;
} else if (error < 0)
goto error;
else {
const char *end;
char *alt, *sep;
if (!odb) {
error = git_repository_odb(&odb, repo);
if (error < 0)
goto error;
}
end = git_buf_cstr(&alts_buf) + git_buf_len(&alts_buf);
for (sep = alt = alts_buf.ptr; sep != end; alt = sep+1) {
for (sep = alt; *sep && *sep != GIT_PATH_LIST_SEPARATOR; sep++)
;
if (*sep)
*sep = '\0';
error = git_odb_add_disk_alternate(odb, alt);
if (error < 0)
goto error;
}
}
if (git_buf_len(&namespace_buf)) {
error = git_repository_set_namespace(repo, git_buf_cstr(&namespace_buf));
if (error < 0)
goto error;
}
git_repository_set_index(repo, index);
if (out) {
*out = repo;
goto success;
}
error:
git_repository_free(repo);
success:
git_odb_free(odb);
git_index_free(index);
git_buf_free(&common_dir_buf);
git_buf_free(&work_tree_buf);
git_buf_free(&alts_buf);
git_buf_free(&object_dir_buf);
git_buf_free(&namespace_buf);
git_buf_free(&index_file_buf);
git_buf_free(&across_fs_buf);
git_buf_free(&ceiling_dirs_buf);
git_buf_free(&dir_buf);
return error;
}
int git_repository_open_ext(
git_repository **repo_ptr,
const char *start_path,
unsigned int flags,
const char *ceiling_dirs)
{
int error;
git_buf path = GIT_BUF_INIT, parent = GIT_BUF_INIT,
link_path = GIT_BUF_INIT, common_path = GIT_BUF_INIT;
git_repository *repo;
git_config *config = NULL;
if (flags & GIT_REPOSITORY_OPEN_FROM_ENV)
return _git_repository_open_ext_from_env(repo_ptr, start_path);
if (repo_ptr)
*repo_ptr = NULL;
error = find_repo(
&path, &parent, &link_path, &common_path, start_path, flags, ceiling_dirs);
if (error < 0 || !repo_ptr)
return error;
repo = repository_alloc();
GITERR_CHECK_ALLOC(repo);
repo->gitdir = git_buf_detach(&path);
GITERR_CHECK_ALLOC(repo->gitdir);
if (link_path.size) {
repo->gitlink = git_buf_detach(&link_path);
GITERR_CHECK_ALLOC(repo->gitlink);
}
if (common_path.size) {
repo->commondir = git_buf_detach(&common_path);
GITERR_CHECK_ALLOC(repo->commondir);
}
if ((error = git_buf_joinpath(&path, repo->gitdir, "gitdir")) < 0)
goto cleanup;
/* A 'gitdir' file inside a git directory is currently
* only used when the repository is a working tree. */
if (git_path_exists(path.ptr))
repo->is_worktree = 1;
/*
* 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 cleanup;
if (config && (error = check_repositoryformatversion(config)) < 0)
goto cleanup;
if ((flags & GIT_REPOSITORY_OPEN_BARE) != 0)
repo->is_bare = 1;
else {
if (config &&
((error = load_config_data(repo, config)) < 0 ||
(error = load_workdir(repo, config, &parent)) < 0))
goto cleanup;
}
cleanup:
git_buf_free(&path);
git_buf_free(&parent);
git_config_free(config);
if (error < 0)
git_repository_free(repo);
else
*repo_ptr = repo;
return error;
}
int git_repository_open(git_repository **repo_out, const char *path)
{
return git_repository_open_ext(
repo_out, path, GIT_REPOSITORY_OPEN_NO_SEARCH, NULL);
}
int git_repository_open_from_worktree(git_repository **repo_out, git_worktree *wt)
{
git_buf path = GIT_BUF_INIT;
git_repository *repo = NULL;
int len, err;
assert(repo_out && wt);
*repo_out = NULL;
len = strlen(wt->gitlink_path);
if (len <= 4 || strcasecmp(wt->gitlink_path + len - 4, ".git")) {
err = -1;
goto out;
}
if ((err = git_buf_set(&path, wt->gitlink_path, len - 4)) < 0)
goto out;
if ((err = git_repository_open(&repo, path.ptr)) < 0)
goto out;
*repo_out = repo;
out:
git_buf_free(&path);
return err;
}
int git_repository_wrap_odb(git_repository **repo_out, git_odb *odb)
{
git_repository *repo;
repo = repository_alloc();
GITERR_CHECK_ALLOC(repo);
git_repository_set_odb(repo, odb);
*repo_out = repo;
return 0;
}
int git_repository_discover(
git_buf *out,
const char *start_path,
int across_fs,
const char *ceiling_dirs)
{
uint32_t flags = across_fs ? GIT_REPOSITORY_OPEN_CROSS_FS : 0;
assert(start_path);
git_buf_sanitize(out);
return find_repo(out, NULL, NULL, NULL, start_path, flags, ceiling_dirs);
}
static int load_config(
git_config **out,
git_repository *repo,
const char *global_config_path,
const char *xdg_config_path,
const char *system_config_path,
const char *programdata_path)
{
int error;
git_buf config_path = GIT_BUF_INIT;
git_config *cfg = NULL;
assert(repo && out);
if ((error = git_config_new(&cfg)) < 0)
return error;
error = git_repository_item_path(&config_path, repo, GIT_REPOSITORY_ITEM_CONFIG);
if (error < 0)
goto on_error;
if ((error = git_config_add_file_ondisk(
cfg, config_path.ptr, GIT_CONFIG_LEVEL_LOCAL, 0)) < 0 &&
error != GIT_ENOTFOUND)
goto on_error;
git_buf_free(&config_path);
if (global_config_path != NULL &&
(error = git_config_add_file_ondisk(
cfg, global_config_path, GIT_CONFIG_LEVEL_GLOBAL, 0)) < 0 &&
error != GIT_ENOTFOUND)
goto on_error;
if (xdg_config_path != NULL &&
(error = git_config_add_file_ondisk(
cfg, xdg_config_path, GIT_CONFIG_LEVEL_XDG, 0)) < 0 &&
error != GIT_ENOTFOUND)
goto on_error;
if (system_config_path != NULL &&
(error = git_config_add_file_ondisk(
cfg, system_config_path, GIT_CONFIG_LEVEL_SYSTEM, 0)) < 0 &&
error != GIT_ENOTFOUND)
goto on_error;
if (programdata_path != NULL &&
(error = git_config_add_file_ondisk(
cfg, programdata_path, GIT_CONFIG_LEVEL_PROGRAMDATA, 0)) < 0 &&
error != GIT_ENOTFOUND)
goto on_error;
giterr_clear(); /* clear any lingering ENOTFOUND errors */
*out = cfg;
return 0;
on_error:
git_buf_free(&config_path);
git_config_free(cfg);
*out = NULL;
return error;
}
static const char *path_unless_empty(git_buf *buf)
{
return git_buf_len(buf) > 0 ? git_buf_cstr(buf) : NULL;
}
int git_repository_config__weakptr(git_config **out, git_repository *repo)
{
int error = 0;
if (repo->_config == NULL) {
git_buf global_buf = GIT_BUF_INIT;
git_buf xdg_buf = GIT_BUF_INIT;
git_buf system_buf = GIT_BUF_INIT;
git_buf programdata_buf = GIT_BUF_INIT;
git_config *config;
git_config_find_global(&global_buf);
git_config_find_xdg(&xdg_buf);
git_config_find_system(&system_buf);
git_config_find_programdata(&programdata_buf);
/* If there is no global file, open a backend for it anyway */
if (git_buf_len(&global_buf) == 0)
git_config__global_location(&global_buf);
error = load_config(
&config, repo,
path_unless_empty(&global_buf),
path_unless_empty(&xdg_buf),
path_unless_empty(&system_buf),
path_unless_empty(&programdata_buf));