| #include "cache.h" |
| #include "repository.h" |
| #include "config.h" |
| #include "submodule-config.h" |
| |
| /* The main repository */ |
| static struct repository the_repo = { |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &the_index, &hash_algos[GIT_HASH_SHA1], 0, 0 |
| }; |
| struct repository *the_repository = &the_repo; |
| |
| static char *git_path_from_env(const char *envvar, const char *git_dir, |
| const char *path, int fromenv) |
| { |
| if (fromenv) { |
| const char *value = getenv(envvar); |
| if (value) |
| return xstrdup(value); |
| } |
| |
| return xstrfmt("%s/%s", git_dir, path); |
| } |
| |
| static int find_common_dir(struct strbuf *sb, const char *gitdir, int fromenv) |
| { |
| if (fromenv) { |
| const char *value = getenv(GIT_COMMON_DIR_ENVIRONMENT); |
| if (value) { |
| strbuf_addstr(sb, value); |
| return 1; |
| } |
| } |
| |
| return get_common_dir_noenv(sb, gitdir); |
| } |
| |
| static void repo_setup_env(struct repository *repo) |
| { |
| struct strbuf sb = STRBUF_INIT; |
| |
| repo->different_commondir = find_common_dir(&sb, repo->gitdir, |
| !repo->ignore_env); |
| free(repo->commondir); |
| repo->commondir = strbuf_detach(&sb, NULL); |
| free(repo->objectdir); |
| repo->objectdir = git_path_from_env(DB_ENVIRONMENT, repo->commondir, |
| "objects", !repo->ignore_env); |
| free(repo->graft_file); |
| repo->graft_file = git_path_from_env(GRAFT_ENVIRONMENT, repo->commondir, |
| "info/grafts", !repo->ignore_env); |
| free(repo->index_file); |
| repo->index_file = git_path_from_env(INDEX_ENVIRONMENT, repo->gitdir, |
| "index", !repo->ignore_env); |
| } |
| |
| void repo_set_gitdir(struct repository *repo, const char *path) |
| { |
| const char *gitfile = read_gitfile(path); |
| char *old_gitdir = repo->gitdir; |
| |
| repo->gitdir = xstrdup(gitfile ? gitfile : path); |
| repo_setup_env(repo); |
| |
| free(old_gitdir); |
| } |
| |
| void repo_set_hash_algo(struct repository *repo, int hash_algo) |
| { |
| repo->hash_algo = &hash_algos[hash_algo]; |
| } |
| |
| /* |
| * 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; |
| |
| 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); |
| |
| out: |
| free(abspath); |
| return ret; |
| } |
| |
| void repo_set_worktree(struct repository *repo, const char *path) |
| { |
| repo->worktree = real_pathdup(path, 1); |
| } |
| |
| 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; |
| memset(repo, 0, sizeof(*repo)); |
| |
| repo->ignore_env = 1; |
| |
| 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); |
| |
| if (worktree) |
| repo_set_worktree(repo, worktree); |
| |
| return 0; |
| |
| error: |
| repo_clear(repo); |
| return -1; |
| } |
| |
| /* |
| * Initialize 'submodule' as the submodule given by 'path' in parent repository |
| * 'superproject'. |
| * Return 0 upon success and a non-zero value upon failure. |
| */ |
| int repo_submodule_init(struct repository *submodule, |
| struct repository *superproject, |
| const char *path) |
| { |
| const struct submodule *sub; |
| struct strbuf gitdir = STRBUF_INIT; |
| struct strbuf worktree = STRBUF_INIT; |
| int ret = 0; |
| |
| sub = submodule_from_cache(superproject, &null_oid, path); |
| if (!sub) { |
| ret = -1; |
| goto out; |
| } |
| |
| strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path); |
| strbuf_repo_worktree_path(&worktree, superproject, "%s", path); |
| |
| if (repo_init(submodule, gitdir.buf, worktree.buf)) { |
| /* |
| * If initilization fails then it may be due to the submodule |
| * not being populated in the superproject's worktree. Instead |
| * we can try to initilize the submodule by finding it's gitdir |
| * in the superproject's 'modules' directory. In this case the |
| * submodule would not have a worktree. |
| */ |
| strbuf_reset(&gitdir); |
| strbuf_repo_git_path(&gitdir, superproject, |
| "modules/%s", sub->name); |
| |
| if (repo_init(submodule, gitdir.buf, NULL)) { |
| ret = -1; |
| goto out; |
| } |
| } |
| |
| submodule->submodule_prefix = xstrfmt("%s%s/", |
| superproject->submodule_prefix ? |
| superproject->submodule_prefix : |
| "", path); |
| |
| out: |
| strbuf_release(&gitdir); |
| strbuf_release(&worktree); |
| return ret; |
| } |
| |
| void repo_clear(struct repository *repo) |
| { |
| FREE_AND_NULL(repo->gitdir); |
| FREE_AND_NULL(repo->commondir); |
| FREE_AND_NULL(repo->objectdir); |
| FREE_AND_NULL(repo->graft_file); |
| FREE_AND_NULL(repo->index_file); |
| FREE_AND_NULL(repo->worktree); |
| FREE_AND_NULL(repo->submodule_prefix); |
| |
| 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); |
| FREE_AND_NULL(repo->index); |
| } |
| } |
| |
| int repo_read_index(struct repository *repo) |
| { |
| if (!repo->index) |
| repo->index = xcalloc(1, sizeof(*repo->index)); |
| |
| return read_index_from(repo->index, repo->index_file, repo->gitdir); |
| } |