8 unsigned char old_sha1
[20];
14 * Calls the specified function for each ref file until it returns nonzero,
15 * and returns the value
17 extern int head_ref(int (*fn
)(const char *path
, const unsigned char *sha1
));
18 extern int for_each_ref(int (*fn
)(const char *path
, const unsigned char *sha1
));
19 extern int for_each_tag_ref(int (*fn
)(const char *path
, const unsigned char *sha1
));
20 extern int for_each_branch_ref(int (*fn
)(const char *path
, const unsigned char *sha1
));
21 extern int for_each_remote_ref(int (*fn
)(const char *path
, const unsigned char *sha1
));
23 /** Reads the refs file specified into sha1 **/
24 extern int get_ref_sha1(const char *ref
, unsigned char *sha1
);
26 /** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
27 extern struct ref_lock
*lock_ref_sha1(const char *ref
, const unsigned char *old_sha1
, int mustexist
);
29 /** Locks any ref (for 'HEAD' type refs). */
30 extern struct ref_lock
*lock_any_ref_for_update(const char *ref
, const unsigned char *old_sha1
, int mustexist
);
32 /** Release any lock taken but not written. **/
33 extern void unlock_ref(struct ref_lock
*lock
);
35 /** Writes sha1 into the ref specified by the lock. **/
36 extern int write_ref_sha1(struct ref_lock
*lock
, const unsigned char *sha1
, const char *msg
);
38 /** Reads log for the value of ref during at_time. **/
39 extern int read_ref_at(const char *ref
, unsigned long at_time
, unsigned char *sha1
);
41 /** Returns 0 if target has the right format for a ref. **/
42 extern int check_ref_format(const char *target
);