| #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 "loose.h" |
| #include "submodule-config.h" |
| #include "sparse-index.h" |
| #include "trace2.h" |
| #include "promisor-remote.h" |
| #include "refs.h" |
| |
| /* |
| * We do not define `USE_THE_REPOSITORY_VARIABLE` in this file because we do |
| * not want to rely on functions that implicitly use `the_repository`. This |
| * means that the `extern` declaration of `the_repository` isn't visible here, |
| * which makes sparse unhappy. We thus declare it here. |
| */ |
| extern struct repository *the_repository; |
| |
| /* The main repository */ |
| static struct repository the_repo; |
| struct repository *the_repository = &the_repo; |
| |
| /* |
| * An escape hatch: if we hit a bug in the production code that fails |
| * to set an appropriate hash algorithm (most likely to happen when |
| * running outside a repository), we can tell the user who reported |
| * the crash to set the environment variable to "sha1" (all lowercase) |
| * to revert to the historical behaviour of defaulting to SHA-1. |
| */ |
| static void set_default_hash_algo(struct repository *repo) |
| { |
| const char *hash_name; |
| int algo; |
| |
| hash_name = getenv("GIT_TEST_DEFAULT_HASH_ALGO"); |
| if (!hash_name) |
| return; |
| algo = hash_algo_by_name(hash_name); |
| if (algo == GIT_HASH_UNKNOWN) |
| return; |
| |
| repo_set_hash_algo(repo, algo); |
| } |
| |
| void initialize_repository(struct repository *repo) |
| { |
| repo->objects = raw_object_store_new(); |
| repo->remote_state = remote_state_new(); |
| repo->parsed_objects = parsed_object_pool_new(repo); |
| ALLOC_ARRAY(repo->index, 1); |
| index_state_init(repo->index, repo); |
| |
| /* |
| * When a command runs inside a repository, it learns what |
| * hash algorithm is in use from the repository, but some |
| * commands are designed to work outside a repository, yet |
| * they want to access the_hash_algo, if only for the length |
| * of the hashed value to see if their input looks like a |
| * plausible hash value. |
| * |
| * We are in the process of identifying such code paths and |
| * giving them an appropriate default individually; any |
| * unconverted code paths that try to access the_hash_algo |
| * will thus fail. The end-users however have an escape hatch |
| * to set GIT_TEST_DEFAULT_HASH_ALGO environment variable to |
| * "sha1" to get back the old behaviour of defaulting to SHA-1. |
| * |
| * This escape hatch is deliberately kept unadvertised, so |
| * that they see crashes and we can get a report before |
| * telling them about it. |
| */ |
| if (repo == the_repository) |
| set_default_hash_algo(repo); |
| } |
| |
| 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); |
| } |
| |
| const char *repo_get_git_dir(struct repository *repo) |
| { |
| if (!repo->gitdir) |
| BUG("repository hasn't been set up"); |
| return repo->gitdir; |
| } |
| |
| const char *repo_get_common_dir(struct repository *repo) |
| { |
| if (!repo->commondir) |
| BUG("repository hasn't been set up"); |
| return repo->commondir; |
| } |
| |
| const char *repo_get_object_directory(struct repository *repo) |
| { |
| if (!repo->objects->odb) |
| BUG("repository hasn't been set up"); |
| return repo->objects->odb->path; |
| } |
| |
| const char *repo_get_index_file(struct repository *repo) |
| { |
| if (!repo->index_file) |
| BUG("repository hasn't been set up"); |
| return repo->index_file; |
| } |
| |
| const char *repo_get_graft_file(struct repository *repo) |
| { |
| if (!repo->graft_file) |
| BUG("repository hasn't been set up"); |
| return repo->graft_file; |
| } |
| |
| const char *repo_get_work_tree(struct repository *repo) |
| { |
| return repo->worktree; |
| } |
| |
| 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_compat_hash_algo(struct repository *repo, int algo) |
| { |
| if (hash_algo_by_ptr(repo->hash_algo) == algo) |
| BUG("hash_algo and compat_hash_algo match"); |
| repo->compat_hash_algo = algo ? &hash_algos[algo] : NULL; |
| if (repo->compat_hash_algo) |
| repo_read_loose_object_map(repo); |
| } |
| |
| void repo_set_ref_storage_format(struct repository *repo, |
| enum ref_storage_format 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)); |
| |
| initialize_repository(repo); |
| |
| 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_compat_hash_algo(repo, format.compat_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); |
| |
| if (repo->compat_hash_algo) |
| repo_read_loose_object_map(repo); |
| |
| 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->fetch_head); |
| FREE_AND_NULL(cache->shallow); |
| } |
| |
| void repo_clear(struct repository *repo) |
| { |
| struct hashmap_iter iter; |
| struct strmap_entry *e; |
| |
| 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); |
| |
| FREE_AND_NULL(repo->settings.fsmonitor); |
| |
| 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); |
| } |
| |
| 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); |
| } |
| |
| strmap_for_each_entry(&repo->submodule_ref_stores, &iter, e) |
| ref_store_release(e->value); |
| strmap_clear(&repo->submodule_ref_stores, 1); |
| |
| strmap_for_each_entry(&repo->worktree_ref_stores, &iter, e) |
| ref_store_release(e->value); |
| strmap_clear(&repo->worktree_ref_stores, 1); |
| |
| 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); |
| } |