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https://github.com/git/git
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0dc90d954d
New interface into the tmp-objdir API to help in-core use of the quarantine feature. * ns/tmp-objdir: tmp-objdir: disable ref updates when replacing the primary odb tmp-objdir: new API for creating temporary writable databases
314 lines
7.5 KiB
C
314 lines
7.5 KiB
C
/*
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* not really _using_ the compat macros, just make sure the_index
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* declaration matches the definition in this file.
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*/
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#define USE_THE_INDEX_COMPATIBILITY_MACROS
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#include "cache.h"
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#include "repository.h"
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#include "object-store.h"
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#include "config.h"
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#include "object.h"
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#include "lockfile.h"
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#include "remote.h"
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#include "submodule-config.h"
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#include "sparse-index.h"
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#include "promisor-remote.h"
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/* The main repository */
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static struct repository the_repo;
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struct repository *the_repository;
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struct index_state the_index;
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void initialize_the_repository(void)
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{
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the_repository = &the_repo;
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the_repo.index = &the_index;
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the_repo.objects = raw_object_store_new();
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the_repo.remote_state = remote_state_new();
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the_repo.parsed_objects = parsed_object_pool_new();
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repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
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}
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static void expand_base_dir(char **out, const char *in,
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const char *base_dir, const char *def_in)
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{
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free(*out);
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if (in)
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*out = xstrdup(in);
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else
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*out = xstrfmt("%s/%s", base_dir, def_in);
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}
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static void repo_set_commondir(struct repository *repo,
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const char *commondir)
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{
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struct strbuf sb = STRBUF_INIT;
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free(repo->commondir);
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if (commondir) {
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repo->different_commondir = 1;
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repo->commondir = xstrdup(commondir);
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return;
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}
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repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
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repo->commondir = strbuf_detach(&sb, NULL);
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}
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void repo_set_gitdir(struct repository *repo,
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const char *root,
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const struct set_gitdir_args *o)
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{
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const char *gitfile = read_gitfile(root);
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/*
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* repo->gitdir is saved because the caller could pass "root"
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* that also points to repo->gitdir. We want to keep it alive
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* until after xstrdup(root). Then we can free it.
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*/
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char *old_gitdir = repo->gitdir;
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repo->gitdir = xstrdup(gitfile ? gitfile : root);
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free(old_gitdir);
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repo_set_commondir(repo, o->commondir);
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if (!repo->objects->odb) {
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CALLOC_ARRAY(repo->objects->odb, 1);
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repo->objects->odb_tail = &repo->objects->odb->next;
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}
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expand_base_dir(&repo->objects->odb->path, o->object_dir,
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repo->commondir, "objects");
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repo->objects->odb->disable_ref_updates = o->disable_ref_updates;
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free(repo->objects->alternate_db);
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repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
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expand_base_dir(&repo->graft_file, o->graft_file,
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repo->commondir, "info/grafts");
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expand_base_dir(&repo->index_file, o->index_file,
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repo->gitdir, "index");
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}
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void repo_set_hash_algo(struct repository *repo, int hash_algo)
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{
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repo->hash_algo = &hash_algos[hash_algo];
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}
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/*
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* Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
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* Return 0 upon success and a non-zero value upon failure.
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*/
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static int repo_init_gitdir(struct repository *repo, const char *gitdir)
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{
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int ret = 0;
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int error = 0;
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char *abspath = NULL;
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const char *resolved_gitdir;
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struct set_gitdir_args args = { NULL };
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abspath = real_pathdup(gitdir, 0);
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if (!abspath) {
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ret = -1;
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goto out;
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}
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/* 'gitdir' must reference the gitdir directly */
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resolved_gitdir = resolve_gitdir_gently(abspath, &error);
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if (!resolved_gitdir) {
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ret = -1;
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goto out;
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}
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repo_set_gitdir(repo, resolved_gitdir, &args);
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out:
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free(abspath);
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return ret;
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}
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void repo_set_worktree(struct repository *repo, const char *path)
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{
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repo->worktree = real_pathdup(path, 1);
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trace2_def_repo(repo);
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}
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static int read_and_verify_repository_format(struct repository_format *format,
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const char *commondir)
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{
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int ret = 0;
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struct strbuf sb = STRBUF_INIT;
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strbuf_addf(&sb, "%s/config", commondir);
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read_repository_format(format, sb.buf);
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strbuf_reset(&sb);
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if (verify_repository_format(format, &sb) < 0) {
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warning("%s", sb.buf);
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ret = -1;
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}
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strbuf_release(&sb);
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return ret;
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}
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/*
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* Initialize 'repo' based on the provided 'gitdir'.
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* Return 0 upon success and a non-zero value upon failure.
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*/
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int repo_init(struct repository *repo,
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const char *gitdir,
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const char *worktree)
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{
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struct repository_format format = REPOSITORY_FORMAT_INIT;
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memset(repo, 0, sizeof(*repo));
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repo->objects = raw_object_store_new();
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repo->parsed_objects = parsed_object_pool_new();
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repo->remote_state = remote_state_new();
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if (repo_init_gitdir(repo, gitdir))
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goto error;
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if (read_and_verify_repository_format(&format, repo->commondir))
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goto error;
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repo_set_hash_algo(repo, format.hash_algo);
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/* take ownership of format.partial_clone */
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repo->repository_format_partial_clone = format.partial_clone;
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format.partial_clone = NULL;
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if (worktree)
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repo_set_worktree(repo, worktree);
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clear_repository_format(&format);
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return 0;
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error:
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repo_clear(repo);
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return -1;
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}
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int repo_submodule_init(struct repository *subrepo,
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struct repository *superproject,
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const char *path,
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const struct object_id *treeish_name)
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{
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struct strbuf gitdir = STRBUF_INIT;
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struct strbuf worktree = STRBUF_INIT;
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int ret = 0;
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strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
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strbuf_repo_worktree_path(&worktree, superproject, "%s", path);
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if (repo_init(subrepo, gitdir.buf, worktree.buf)) {
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/*
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* If initialization fails then it may be due to the submodule
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* not being populated in the superproject's worktree. Instead
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* we can try to initialize the submodule by finding it's gitdir
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* in the superproject's 'modules' directory. In this case the
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* submodule would not have a worktree.
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*/
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const struct submodule *sub =
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submodule_from_path(superproject, treeish_name, path);
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if (!sub) {
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ret = -1;
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goto out;
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}
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strbuf_reset(&gitdir);
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submodule_name_to_gitdir(&gitdir, superproject, sub->name);
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if (repo_init(subrepo, gitdir.buf, NULL)) {
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ret = -1;
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goto out;
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}
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}
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subrepo->submodule_prefix = xstrfmt("%s%s/",
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superproject->submodule_prefix ?
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superproject->submodule_prefix :
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"", path);
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out:
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strbuf_release(&gitdir);
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strbuf_release(&worktree);
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return ret;
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}
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void repo_clear(struct repository *repo)
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{
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FREE_AND_NULL(repo->gitdir);
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FREE_AND_NULL(repo->commondir);
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FREE_AND_NULL(repo->graft_file);
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FREE_AND_NULL(repo->index_file);
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FREE_AND_NULL(repo->worktree);
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FREE_AND_NULL(repo->submodule_prefix);
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raw_object_store_clear(repo->objects);
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FREE_AND_NULL(repo->objects);
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parsed_object_pool_clear(repo->parsed_objects);
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FREE_AND_NULL(repo->parsed_objects);
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if (repo->config) {
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git_configset_clear(repo->config);
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FREE_AND_NULL(repo->config);
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}
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if (repo->submodule_cache) {
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submodule_cache_free(repo->submodule_cache);
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repo->submodule_cache = NULL;
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}
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if (repo->index) {
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discard_index(repo->index);
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if (repo->index != &the_index)
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FREE_AND_NULL(repo->index);
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}
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if (repo->promisor_remote_config) {
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promisor_remote_clear(repo->promisor_remote_config);
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FREE_AND_NULL(repo->promisor_remote_config);
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}
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if (repo->remote_state) {
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remote_state_clear(repo->remote_state);
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FREE_AND_NULL(repo->remote_state);
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}
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}
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int repo_read_index(struct repository *repo)
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{
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int res;
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if (!repo->index)
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CALLOC_ARRAY(repo->index, 1);
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/* Complete the double-reference */
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if (!repo->index->repo)
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repo->index->repo = repo;
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else if (repo->index->repo != repo)
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BUG("repo's index should point back at itself");
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res = read_index_from(repo->index, repo->index_file, repo->gitdir);
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prepare_repo_settings(repo);
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if (repo->settings.command_requires_full_index)
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ensure_full_index(repo->index);
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return res;
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}
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int repo_hold_locked_index(struct repository *repo,
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struct lock_file *lf,
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int flags)
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{
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if (!repo->index_file)
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BUG("the repo hasn't been setup");
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return hold_lock_file_for_update(lf, repo->index_file, flags);
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}
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