summaryrefslogtreecommitdiffstats
path: root/repository.c
diff options
context:
space:
mode:
Diffstat (limited to 'repository.c')
-rw-r--r--repository.c337
1 files changed, 337 insertions, 0 deletions
diff --git a/repository.c b/repository.c
new file mode 100644
index 0000000..3427085
--- /dev/null
+++ b/repository.c
@@ -0,0 +1,337 @@
+/*
+ * not really _using_ the compat macros, just make sure the_index
+ * declaration matches the definition in this file.
+ */
+#define USE_THE_INDEX_VARIABLE
+#include "cache.h"
+#include "repository.h"
+#include "object-store.h"
+#include "config.h"
+#include "object.h"
+#include "lockfile.h"
+#include "remote.h"
+#include "submodule-config.h"
+#include "sparse-index.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();
+
+ 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];
+}
+
+/*
+ * 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);
+
+ /* 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;
+
+ if (!repo->index)
+ CALLOC_ARRAY(repo->index, 1);
+
+ /* Complete the double-reference */
+ if (!repo->index->repo)
+ repo->index->repo = 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);
+}