diff options
Diffstat (limited to 'refs/refs-internal.h')
| -rw-r--r-- | refs/refs-internal.h | 220 |
1 files changed, 197 insertions, 23 deletions
diff --git a/refs/refs-internal.h b/refs/refs-internal.h index efe584701b..708b26082a 100644 --- a/refs/refs-internal.h +++ b/refs/refs-internal.h @@ -162,7 +162,7 @@ struct ref_update { */ unsigned int flags; - struct ref_lock *lock; + void *backend_data; unsigned int type; char *msg; @@ -240,7 +240,17 @@ const char *find_descendant_ref(const char *dirname, const struct string_list *extras, const struct string_list *skip); -int rename_ref_available(const char *oldname, const char *newname); +/* + * Check whether an attempt to rename old_refname to new_refname would + * cause a D/F conflict with any existing reference (other than + * possibly old_refname). If there would be a conflict, emit an error + * message and return false; otherwise, return true. + * + * Note that this function is not safe against all races with other + * processes (though rename_ref() catches some races that might get by + * this check). + */ +int rename_ref_available(const char *old_refname, const char *new_refname); /* We allow "recursive" symbolic refs. Only within reason, though */ #define SYMREF_MAXDEPTH 5 @@ -394,23 +404,6 @@ struct ref_iterator *prefix_ref_iterator_begin(struct ref_iterator *iter0, const char *prefix, int trim); -/* - * Iterate over the packed and loose references in the specified - * submodule that are within find_containing_dir(prefix). If prefix is - * NULL or the empty string, iterate over all references in the - * submodule. - */ -struct ref_iterator *files_ref_iterator_begin(const char *submodule, - const char *prefix, - unsigned int flags); - -/* - * Iterate over the references in the main ref_store that have a - * reflog. The paths within a directory are iterated over in arbitrary - * order. - */ -struct ref_iterator *files_reflog_iterator_begin(void); - /* Internal implementation of reference iteration: */ /* @@ -475,8 +468,85 @@ int do_for_each_ref_iterator(struct ref_iterator *iter, each_ref_fn fn, void *cb_data); /* - * Read the specified reference from the filesystem or packed refs - * file, non-recursively. Set type to describe the reference, and: + * Only include per-worktree refs in a do_for_each_ref*() iteration. + * Normally this will be used with a files ref_store, since that's + * where all reference backends will presumably store their + * per-worktree refs. + */ +#define DO_FOR_EACH_PER_WORKTREE_ONLY 0x02 + +struct ref_store; + +/* refs backends */ + +/* + * Initialize the ref_store for the specified submodule, or for the + * main repository if submodule == NULL. These functions should call + * base_ref_store_init() to initialize the shared part of the + * ref_store and to record the ref_store for later lookup. + */ +typedef struct ref_store *ref_store_init_fn(const char *submodule); + +typedef int ref_init_db_fn(struct ref_store *refs, struct strbuf *err); + +typedef int ref_transaction_commit_fn(struct ref_store *refs, + struct ref_transaction *transaction, + struct strbuf *err); + +typedef int pack_refs_fn(struct ref_store *ref_store, unsigned int flags); +typedef int peel_ref_fn(struct ref_store *ref_store, + const char *refname, unsigned char *sha1); +typedef int create_symref_fn(struct ref_store *ref_store, + const char *ref_target, + const char *refs_heads_master, + const char *logmsg); +typedef int delete_refs_fn(struct ref_store *ref_store, + struct string_list *refnames, unsigned int flags); +typedef int rename_ref_fn(struct ref_store *ref_store, + const char *oldref, const char *newref, + const char *logmsg); + +/* + * Iterate over the references in the specified ref_store that are + * within find_containing_dir(prefix). If prefix is NULL or the empty + * string, iterate over all references in the submodule. + */ +typedef struct ref_iterator *ref_iterator_begin_fn( + struct ref_store *ref_store, + const char *prefix, unsigned int flags); + +/* reflog functions */ + +/* + * Iterate over the references in the specified ref_store that have a + * reflog. The refs are iterated over in arbitrary order. + */ +typedef struct ref_iterator *reflog_iterator_begin_fn( + struct ref_store *ref_store); + +typedef int for_each_reflog_ent_fn(struct ref_store *ref_store, + const char *refname, + each_reflog_ent_fn fn, + void *cb_data); +typedef int for_each_reflog_ent_reverse_fn(struct ref_store *ref_store, + const char *refname, + each_reflog_ent_fn fn, + void *cb_data); +typedef int reflog_exists_fn(struct ref_store *ref_store, const char *refname); +typedef int create_reflog_fn(struct ref_store *ref_store, const char *refname, + int force_create, struct strbuf *err); +typedef int delete_reflog_fn(struct ref_store *ref_store, const char *refname); +typedef int reflog_expire_fn(struct ref_store *ref_store, + const char *refname, const unsigned char *sha1, + unsigned int flags, + reflog_expiry_prepare_fn prepare_fn, + reflog_expiry_should_prune_fn should_prune_fn, + reflog_expiry_cleanup_fn cleanup_fn, + void *policy_cb_data); + +/* + * Read a reference from the specified reference store, non-recursively. + * Set type to describe the reference, and: * * - If refname is the name of a normal reference, fill in sha1 * (leaving referent unchanged). @@ -512,7 +582,111 @@ int do_for_each_ref_iterator(struct ref_iterator *iter, * - in all other cases, referent will be untouched, and therefore * refname will still be valid and unchanged. */ -int read_raw_ref(const char *refname, unsigned char *sha1, - struct strbuf *referent, unsigned int *type); +typedef int read_raw_ref_fn(struct ref_store *ref_store, + const char *refname, unsigned char *sha1, + struct strbuf *referent, unsigned int *type); + +typedef int verify_refname_available_fn(struct ref_store *ref_store, + const char *newname, + const struct string_list *extras, + const struct string_list *skip, + struct strbuf *err); + +struct ref_storage_be { + struct ref_storage_be *next; + const char *name; + ref_store_init_fn *init; + ref_init_db_fn *init_db; + ref_transaction_commit_fn *transaction_commit; + ref_transaction_commit_fn *initial_transaction_commit; + + pack_refs_fn *pack_refs; + peel_ref_fn *peel_ref; + create_symref_fn *create_symref; + delete_refs_fn *delete_refs; + rename_ref_fn *rename_ref; + + ref_iterator_begin_fn *iterator_begin; + read_raw_ref_fn *read_raw_ref; + verify_refname_available_fn *verify_refname_available; + + reflog_iterator_begin_fn *reflog_iterator_begin; + for_each_reflog_ent_fn *for_each_reflog_ent; + for_each_reflog_ent_reverse_fn *for_each_reflog_ent_reverse; + reflog_exists_fn *reflog_exists; + create_reflog_fn *create_reflog; + delete_reflog_fn *delete_reflog; + reflog_expire_fn *reflog_expire; +}; + +extern struct ref_storage_be refs_be_files; + +/* + * A representation of the reference store for the main repository or + * a submodule. The ref_store instances for submodules are kept in a + * linked list. + */ +struct ref_store { + /* The backend describing this ref_store's storage scheme: */ + const struct ref_storage_be *be; + + /* + * The name of the submodule represented by this object, or + * the empty string if it represents the main repository's + * reference store: + */ + const char *submodule; + + /* + * Submodule reference store instances are stored in a linked + * list using this pointer. + */ + struct ref_store *next; +}; + +/* + * Fill in the generic part of refs for the specified submodule and + * add it to our collection of reference stores. + */ +void base_ref_store_init(struct ref_store *refs, + const struct ref_storage_be *be, + const char *submodule); + +/* + * Create, record, and return a ref_store instance for the specified + * submodule (or the main repository if submodule is NULL). + * + * For backwards compatibility, submodule=="" is treated the same as + * submodule==NULL. + */ +struct ref_store *ref_store_init(const char *submodule); + +/* + * Return the ref_store instance for the specified submodule (or the + * main repository if submodule is NULL). If that ref_store hasn't + * been initialized yet, return NULL. + * + * For backwards compatibility, submodule=="" is treated the same as + * submodule==NULL. + */ +struct ref_store *lookup_ref_store(const char *submodule); + +/* + * Return the ref_store instance for the specified submodule. For the + * main repository, use submodule==NULL; such a call cannot fail. For + * a submodule, the submodule must exist and be a nonbare repository, + * otherwise return NULL. If the requested reference store has not yet + * been initialized, initialize it first. + * + * For backwards compatibility, submodule=="" is treated the same as + * submodule==NULL. + */ +struct ref_store *get_ref_store(const char *submodule); + +/* + * Die if refs is for a submodule (i.e., not for the main repository). + * caller is used in any necessary error messages. + */ +void assert_main_repository(struct ref_store *refs, const char *caller); #endif /* REFS_REFS_INTERNAL_H */ |