mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Patrick Steinhardt](/assets/img/avatar_default.png)
In order to discern which ref storage format a repository is supposed to use we need to start setting up and/or discovering the format. This needs to happen in two separate code paths. - The first path is when we create a repository via `init_db()`. When we are re-initializing a preexisting repository we need to retain the previously used ref storage format -- if the user asked for a different format then this indicates an error and we error out. Otherwise we either initialize the repository with the format asked for by the user or the default format, which currently is the "files" backend. - The second path is when discovering repositories, where we need to read the config of that repository. There is not yet any way to configure something other than the "files" backend, so we can just blindly set the ref storage format to this backend. Wire up this logic so that we have the ref storage format always readily available when needed. As there is only a single backend and because it is not configurable we cannot yet verify that this tracking works as expected via tests, but tests will be added in subsequent commits. To countermand this ommission now though, raise a BUG() in case the ref storage format is not set up properly in `ref_store_init()`. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
351 lines
8.5 KiB
C
351 lines
8.5 KiB
C
/*
|
|
* not really _using_ the compat macros, just make sure the_index
|
|
* declaration matches the definition in this file.
|
|
*/
|
|
#define USE_THE_INDEX_VARIABLE
|
|
#include "git-compat-util.h"
|
|
#include "abspath.h"
|
|
#include "repository.h"
|
|
#include "object-store-ll.h"
|
|
#include "config.h"
|
|
#include "object.h"
|
|
#include "lockfile.h"
|
|
#include "path.h"
|
|
#include "read-cache-ll.h"
|
|
#include "remote.h"
|
|
#include "setup.h"
|
|
#include "submodule-config.h"
|
|
#include "sparse-index.h"
|
|
#include "trace2.h"
|
|
#include "promisor-remote.h"
|
|
|
|
/* The main repository */
|
|
static struct repository the_repo;
|
|
struct repository *the_repository;
|
|
struct index_state the_index;
|
|
|
|
void initialize_the_repository(void)
|
|
{
|
|
the_repository = &the_repo;
|
|
|
|
the_repo.index = &the_index;
|
|
the_repo.objects = raw_object_store_new();
|
|
the_repo.remote_state = remote_state_new();
|
|
the_repo.parsed_objects = parsed_object_pool_new();
|
|
|
|
index_state_init(&the_index, the_repository);
|
|
|
|
repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
|
|
}
|
|
|
|
static void expand_base_dir(char **out, const char *in,
|
|
const char *base_dir, const char *def_in)
|
|
{
|
|
free(*out);
|
|
if (in)
|
|
*out = xstrdup(in);
|
|
else
|
|
*out = xstrfmt("%s/%s", base_dir, def_in);
|
|
}
|
|
|
|
static void repo_set_commondir(struct repository *repo,
|
|
const char *commondir)
|
|
{
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
free(repo->commondir);
|
|
|
|
if (commondir) {
|
|
repo->different_commondir = 1;
|
|
repo->commondir = xstrdup(commondir);
|
|
return;
|
|
}
|
|
|
|
repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
|
|
repo->commondir = strbuf_detach(&sb, NULL);
|
|
}
|
|
|
|
void repo_set_gitdir(struct repository *repo,
|
|
const char *root,
|
|
const struct set_gitdir_args *o)
|
|
{
|
|
const char *gitfile = read_gitfile(root);
|
|
/*
|
|
* repo->gitdir is saved because the caller could pass "root"
|
|
* that also points to repo->gitdir. We want to keep it alive
|
|
* until after xstrdup(root). Then we can free it.
|
|
*/
|
|
char *old_gitdir = repo->gitdir;
|
|
|
|
repo->gitdir = xstrdup(gitfile ? gitfile : root);
|
|
free(old_gitdir);
|
|
|
|
repo_set_commondir(repo, o->commondir);
|
|
|
|
if (!repo->objects->odb) {
|
|
CALLOC_ARRAY(repo->objects->odb, 1);
|
|
repo->objects->odb_tail = &repo->objects->odb->next;
|
|
}
|
|
expand_base_dir(&repo->objects->odb->path, o->object_dir,
|
|
repo->commondir, "objects");
|
|
|
|
repo->objects->odb->disable_ref_updates = o->disable_ref_updates;
|
|
|
|
free(repo->objects->alternate_db);
|
|
repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
|
|
expand_base_dir(&repo->graft_file, o->graft_file,
|
|
repo->commondir, "info/grafts");
|
|
expand_base_dir(&repo->index_file, o->index_file,
|
|
repo->gitdir, "index");
|
|
}
|
|
|
|
void repo_set_hash_algo(struct repository *repo, int hash_algo)
|
|
{
|
|
repo->hash_algo = &hash_algos[hash_algo];
|
|
}
|
|
|
|
void repo_set_ref_storage_format(struct repository *repo, unsigned int format)
|
|
{
|
|
repo->ref_storage_format = format;
|
|
}
|
|
|
|
/*
|
|
* Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
|
|
* Return 0 upon success and a non-zero value upon failure.
|
|
*/
|
|
static int repo_init_gitdir(struct repository *repo, const char *gitdir)
|
|
{
|
|
int ret = 0;
|
|
int error = 0;
|
|
char *abspath = NULL;
|
|
const char *resolved_gitdir;
|
|
struct set_gitdir_args args = { NULL };
|
|
|
|
abspath = real_pathdup(gitdir, 0);
|
|
if (!abspath) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* 'gitdir' must reference the gitdir directly */
|
|
resolved_gitdir = resolve_gitdir_gently(abspath, &error);
|
|
if (!resolved_gitdir) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
repo_set_gitdir(repo, resolved_gitdir, &args);
|
|
|
|
out:
|
|
free(abspath);
|
|
return ret;
|
|
}
|
|
|
|
void repo_set_worktree(struct repository *repo, const char *path)
|
|
{
|
|
repo->worktree = real_pathdup(path, 1);
|
|
|
|
trace2_def_repo(repo);
|
|
}
|
|
|
|
static int read_and_verify_repository_format(struct repository_format *format,
|
|
const char *commondir)
|
|
{
|
|
int ret = 0;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
strbuf_addf(&sb, "%s/config", commondir);
|
|
read_repository_format(format, sb.buf);
|
|
strbuf_reset(&sb);
|
|
|
|
if (verify_repository_format(format, &sb) < 0) {
|
|
warning("%s", sb.buf);
|
|
ret = -1;
|
|
}
|
|
|
|
strbuf_release(&sb);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Initialize 'repo' based on the provided 'gitdir'.
|
|
* Return 0 upon success and a non-zero value upon failure.
|
|
*/
|
|
int repo_init(struct repository *repo,
|
|
const char *gitdir,
|
|
const char *worktree)
|
|
{
|
|
struct repository_format format = REPOSITORY_FORMAT_INIT;
|
|
memset(repo, 0, sizeof(*repo));
|
|
|
|
repo->objects = raw_object_store_new();
|
|
repo->parsed_objects = parsed_object_pool_new();
|
|
repo->remote_state = remote_state_new();
|
|
|
|
if (repo_init_gitdir(repo, gitdir))
|
|
goto error;
|
|
|
|
if (read_and_verify_repository_format(&format, repo->commondir))
|
|
goto error;
|
|
|
|
repo_set_hash_algo(repo, format.hash_algo);
|
|
repo_set_ref_storage_format(repo, format.ref_storage_format);
|
|
repo->repository_format_worktree_config = format.worktree_config;
|
|
|
|
/* take ownership of format.partial_clone */
|
|
repo->repository_format_partial_clone = format.partial_clone;
|
|
format.partial_clone = NULL;
|
|
|
|
if (worktree)
|
|
repo_set_worktree(repo, worktree);
|
|
|
|
clear_repository_format(&format);
|
|
return 0;
|
|
|
|
error:
|
|
repo_clear(repo);
|
|
return -1;
|
|
}
|
|
|
|
int repo_submodule_init(struct repository *subrepo,
|
|
struct repository *superproject,
|
|
const char *path,
|
|
const struct object_id *treeish_name)
|
|
{
|
|
struct strbuf gitdir = STRBUF_INIT;
|
|
struct strbuf worktree = STRBUF_INIT;
|
|
int ret = 0;
|
|
|
|
strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
|
|
strbuf_repo_worktree_path(&worktree, superproject, "%s", path);
|
|
|
|
if (repo_init(subrepo, gitdir.buf, worktree.buf)) {
|
|
/*
|
|
* If initialization fails then it may be due to the submodule
|
|
* not being populated in the superproject's worktree. Instead
|
|
* we can try to initialize the submodule by finding it's gitdir
|
|
* in the superproject's 'modules' directory. In this case the
|
|
* submodule would not have a worktree.
|
|
*/
|
|
const struct submodule *sub =
|
|
submodule_from_path(superproject, treeish_name, path);
|
|
if (!sub) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
strbuf_reset(&gitdir);
|
|
submodule_name_to_gitdir(&gitdir, superproject, sub->name);
|
|
|
|
if (repo_init(subrepo, gitdir.buf, NULL)) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
subrepo->submodule_prefix = xstrfmt("%s%s/",
|
|
superproject->submodule_prefix ?
|
|
superproject->submodule_prefix :
|
|
"", path);
|
|
|
|
out:
|
|
strbuf_release(&gitdir);
|
|
strbuf_release(&worktree);
|
|
return ret;
|
|
}
|
|
|
|
static void repo_clear_path_cache(struct repo_path_cache *cache)
|
|
{
|
|
FREE_AND_NULL(cache->squash_msg);
|
|
FREE_AND_NULL(cache->squash_msg);
|
|
FREE_AND_NULL(cache->merge_msg);
|
|
FREE_AND_NULL(cache->merge_rr);
|
|
FREE_AND_NULL(cache->merge_mode);
|
|
FREE_AND_NULL(cache->merge_head);
|
|
FREE_AND_NULL(cache->merge_autostash);
|
|
FREE_AND_NULL(cache->auto_merge);
|
|
FREE_AND_NULL(cache->fetch_head);
|
|
FREE_AND_NULL(cache->shallow);
|
|
}
|
|
|
|
void repo_clear(struct repository *repo)
|
|
{
|
|
FREE_AND_NULL(repo->gitdir);
|
|
FREE_AND_NULL(repo->commondir);
|
|
FREE_AND_NULL(repo->graft_file);
|
|
FREE_AND_NULL(repo->index_file);
|
|
FREE_AND_NULL(repo->worktree);
|
|
FREE_AND_NULL(repo->submodule_prefix);
|
|
|
|
raw_object_store_clear(repo->objects);
|
|
FREE_AND_NULL(repo->objects);
|
|
|
|
parsed_object_pool_clear(repo->parsed_objects);
|
|
FREE_AND_NULL(repo->parsed_objects);
|
|
|
|
if (repo->config) {
|
|
git_configset_clear(repo->config);
|
|
FREE_AND_NULL(repo->config);
|
|
}
|
|
|
|
if (repo->submodule_cache) {
|
|
submodule_cache_free(repo->submodule_cache);
|
|
repo->submodule_cache = NULL;
|
|
}
|
|
|
|
if (repo->index) {
|
|
discard_index(repo->index);
|
|
if (repo->index != &the_index)
|
|
FREE_AND_NULL(repo->index);
|
|
}
|
|
|
|
if (repo->promisor_remote_config) {
|
|
promisor_remote_clear(repo->promisor_remote_config);
|
|
FREE_AND_NULL(repo->promisor_remote_config);
|
|
}
|
|
|
|
if (repo->remote_state) {
|
|
remote_state_clear(repo->remote_state);
|
|
FREE_AND_NULL(repo->remote_state);
|
|
}
|
|
|
|
repo_clear_path_cache(&repo->cached_paths);
|
|
}
|
|
|
|
int repo_read_index(struct repository *repo)
|
|
{
|
|
int res;
|
|
|
|
/* Complete the double-reference */
|
|
if (!repo->index) {
|
|
ALLOC_ARRAY(repo->index, 1);
|
|
index_state_init(repo->index, repo);
|
|
} else if (repo->index->repo != repo) {
|
|
BUG("repo's index should point back at itself");
|
|
}
|
|
|
|
res = read_index_from(repo->index, repo->index_file, repo->gitdir);
|
|
|
|
prepare_repo_settings(repo);
|
|
if (repo->settings.command_requires_full_index)
|
|
ensure_full_index(repo->index);
|
|
|
|
/*
|
|
* If sparse checkouts are in use, check whether paths with the
|
|
* SKIP_WORKTREE attribute are missing from the worktree; if not,
|
|
* clear that attribute for that path.
|
|
*/
|
|
clear_skip_worktree_from_present_files(repo->index);
|
|
|
|
return res;
|
|
}
|
|
|
|
int repo_hold_locked_index(struct repository *repo,
|
|
struct lock_file *lf,
|
|
int flags)
|
|
{
|
|
if (!repo->index_file)
|
|
BUG("the repo hasn't been setup");
|
|
return hold_lock_file_for_update(lf, repo->index_file, flags);
|
|
}
|