int force_write;
};
+/**
+ * Information needed for a single ref update. Set new_sha1 to the
+ * new value or to zero to delete the ref. To check the old value
+ * while locking the ref, set have_old to 1 and set old_sha1 to the
+ * value or to zero to ensure the ref does not exist before update.
+ */
+struct ref_update {
+ const char *ref_name;
+ unsigned char new_sha1[20];
+ unsigned char old_sha1[20];
+ int flags; /* REF_NODEREF? */
+ int have_old; /* 1 if old_sha1 is valid, 0 otherwise */
+};
+
/*
* Bit values set in the flags argument passed to each_ref_fn():
*/
extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
/*
- * Add a reference to the in-memory packed reference cache. To actually
- * write the reference to the packed-refs file, call pack_refs().
+ * Lock the packed-refs file for writing. Flags is passed to
+ * hold_lock_file_for_update(). Return 0 on success.
+ */
+extern int lock_packed_refs(int flags);
+
+/*
+ * Add a reference to the in-memory packed reference cache. This may
+ * only be called while the packed-refs file is locked (see
+ * lock_packed_refs()). To actually write the packed-refs file, call
+ * commit_packed_refs().
*/
extern void add_packed_ref(const char *refname, const unsigned char *sha1);
+/*
+ * Write the current version of the packed refs cache from memory to
+ * disk. The packed-refs file must already be locked for writing (see
+ * lock_packed_refs()). Return zero on success.
+ */
+extern int commit_packed_refs(void);
+
+/*
+ * Rollback the lockfile for the packed-refs file, and discard the
+ * in-memory packed reference cache. (The packed-refs file will be
+ * read anew if it is needed again after this function is called.)
+ */
+extern void rollback_packed_refs(void);
+
/*
* Flags for controlling behaviour of pack_refs()
* PACK_REFS_PRUNE: Prune loose refs after packing
#define REF_NODEREF 0x01
extern struct ref_lock *lock_any_ref_for_update(const char *refname,
const unsigned char *old_sha1,
- int flags);
+ int flags, int *type_p);
/** Close the file descriptor owned by a lock and return the status */
extern int close_ref(struct ref_lock *lock);
const unsigned char *sha1, const unsigned char *oldval,
int flags, enum action_on_err onerr);
+/**
+ * Lock all refs and then perform all modifications.
+ */
+int update_refs(const char *action, const struct ref_update **updates,
+ int n, enum action_on_err onerr);
+
extern int parse_hide_refs_config(const char *var, const char *value, const char *);
extern int ref_is_hidden(const char *);