diff options
| -rw-r--r-- | environment.c | 2 | ||||
| -rw-r--r-- | notes.c | 1 | ||||
| -rw-r--r-- | refs.c | 83 | ||||
| -rw-r--r-- | refs.h | 46 |
4 files changed, 132 insertions, 0 deletions
diff --git a/environment.c b/environment.c index b3296ce7d1..9eb22f975c 100644 --- a/environment.c +++ b/environment.c @@ -185,6 +185,8 @@ void setup_git_env(const char *git_dir) free(git_replace_ref_base); git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base : "refs/replace/"); + update_ref_namespace(NAMESPACE_REPLACE, git_replace_ref_base); + free(git_namespace); git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT)); shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT); @@ -1005,6 +1005,7 @@ void init_notes(struct notes_tree *t, const char *notes_ref, if (!notes_ref) notes_ref = default_notes_ref(); + update_ref_namespace(NAMESPACE_NOTES, xstrdup(notes_ref)); if (!combine_notes) combine_notes = combine_notes_concatenate; @@ -20,6 +20,7 @@ #include "repository.h" #include "sigchain.h" #include "date.h" +#include "commit.h" /* * List of all available backends @@ -56,6 +57,88 @@ static unsigned char refname_disposition[256] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4 }; +struct ref_namespace_info ref_namespace[] = { + [NAMESPACE_HEAD] = { + .ref = "HEAD", + .decoration = DECORATION_REF_HEAD, + .exact = 1, + }, + [NAMESPACE_BRANCHES] = { + .ref = "refs/heads/", + .decoration = DECORATION_REF_LOCAL, + }, + [NAMESPACE_TAGS] = { + .ref = "refs/tags/", + .decoration = DECORATION_REF_TAG, + }, + [NAMESPACE_REMOTE_REFS] = { + /* + * The default refspec for new remotes copies refs from + * refs/heads/ on the remote into refs/remotes/<remote>/. + * As such, "refs/remotes/" has special handling. + */ + .ref = "refs/remotes/", + .decoration = DECORATION_REF_REMOTE, + }, + [NAMESPACE_STASH] = { + /* + * The single ref "refs/stash" stores the latest stash. + * Older stashes can be found in the reflog. + */ + .ref = "refs/stash", + .exact = 1, + .decoration = DECORATION_REF_STASH, + }, + [NAMESPACE_REPLACE] = { + /* + * This namespace allows Git to act as if one object ID + * points to the content of another. Unlike the other + * ref namespaces, this one can be changed by the + * GIT_REPLACE_REF_BASE environment variable. This + * .namespace value will be overwritten in setup_git_env(). + */ + .ref = "refs/replace/", + .decoration = DECORATION_GRAFTED, + }, + [NAMESPACE_NOTES] = { + /* + * The refs/notes/commit ref points to the tip of a + * parallel commit history that adds metadata to commits + * in the normal history. This ref can be overwritten + * by the core.notesRef config variable or the + * GIT_NOTES_REFS environment variable. + */ + .ref = "refs/notes/commit", + .exact = 1, + }, + [NAMESPACE_PREFETCH] = { + /* + * Prefetch refs are written by the background 'fetch' + * maintenance task. It allows faster foreground fetches + * by advertising these previously-downloaded tips without + * updating refs/remotes/ without user intervention. + */ + .ref = "refs/prefetch/", + }, + [NAMESPACE_REWRITTEN] = { + /* + * Rewritten refs are used by the 'label' command in the + * sequencer. These are particularly useful during an + * interactive rebase that uses the 'merge' command. + */ + .ref = "refs/rewritten/", + }, +}; + +void update_ref_namespace(enum ref_namespace namespace, char *ref) +{ + struct ref_namespace_info *info = &ref_namespace[namespace]; + if (info->ref_updated) + free(info->ref); + info->ref = ref; + info->ref_updated = 1; +} + /* * Try to read one refname component from the front of refname. * Return the length of the component found, or -1 if the component is @@ -2,6 +2,7 @@ #define REFS_H #include "cache.h" +#include "commit.h" struct object_id; struct ref_store; @@ -930,4 +931,49 @@ struct ref_store *get_main_ref_store(struct repository *r); struct ref_store *get_submodule_ref_store(const char *submodule); struct ref_store *get_worktree_ref_store(const struct worktree *wt); +/* + * Some of the names specified by refs have special meaning to Git. + * Organize these namespaces in a comon 'ref_namespace' array for + * reference from multiple places in the codebase. + */ + +struct ref_namespace_info { + char *ref; + enum decoration_type decoration; + + /* + * If 'exact' is true, then we must match the 'ref' exactly. + * Otherwise, use a prefix match. + * + * 'ref_updated' is for internal use. It represents whether the + * 'ref' value was replaced from its original literal version. + */ + unsigned exact:1, + ref_updated:1; +}; + +enum ref_namespace { + NAMESPACE_HEAD, + NAMESPACE_BRANCHES, + NAMESPACE_TAGS, + NAMESPACE_REMOTE_REFS, + NAMESPACE_STASH, + NAMESPACE_REPLACE, + NAMESPACE_NOTES, + NAMESPACE_PREFETCH, + NAMESPACE_REWRITTEN, + + /* Must be last */ + NAMESPACE__COUNT +}; + +/* See refs.c for the contents of this array. */ +extern struct ref_namespace_info ref_namespace[NAMESPACE__COUNT]; + +/* + * Some ref namespaces can be modified by config values or environment + * variables. Modify a namespace as specified by its ref_namespace key. + */ +void update_ref_namespace(enum ref_namespace namespace, char *ref); + #endif /* REFS_H */ |