8 unsigned char old_sha1[20];
13 #define REF_ISSYMREF 01
14 #define REF_ISPACKED 02
17 * Calls the specified function for each ref file until it returns nonzero,
18 * and returns the value
20 typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
21 extern int head_ref(each_ref_fn, void *);
22 extern int for_each_ref(each_ref_fn, void *);
23 extern int for_each_tag_ref(each_ref_fn, void *);
24 extern int for_each_branch_ref(each_ref_fn, void *);
25 extern int for_each_remote_ref(each_ref_fn, void *);
27 /* can be used to learn about broken ref and symref */
28 extern int for_each_rawref(each_ref_fn, void *);
30 extern void warn_dangling_symref(const char *msg_fmt, const char *refname);
33 * Extra refs will be listed by for_each_ref() before any actual refs
34 * for the duration of this process or until clear_extra_refs() is
35 * called. Only extra refs added before for_each_ref() is called will
36 * be listed on a given call of for_each_ref().
38 extern void add_extra_ref(const char *refname, const unsigned char *sha1, int flags);
39 extern void clear_extra_refs(void);
41 extern int peel_ref(const char *, unsigned char *);
43 /** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
44 extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
46 /** Locks any ref (for 'HEAD' type refs). */
47 #define REF_NODEREF 0x01
48 extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags);
50 /** Close the file descriptor owned by a lock and return the status */
51 extern int close_ref(struct ref_lock *lock);
53 /** Close and commit the ref locked by the lock */
54 extern int commit_ref(struct ref_lock *lock);
56 /** Release any lock taken but not written. **/
57 extern void unlock_ref(struct ref_lock *lock);
59 /** Writes sha1 into the ref specified by the lock. **/
60 extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
62 /** Reads log for the value of ref during at_time. **/
63 extern int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt);
65 /* iterate over reflog entries */
66 typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
67 int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
68 int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long, void *cb_data);
71 * Calls the specified function for each reflog file until it returns nonzero,
72 * and returns the value
74 extern int for_each_reflog(each_ref_fn, void *);
76 #define CHECK_REF_FORMAT_OK 0
77 #define CHECK_REF_FORMAT_ERROR (-1)
78 #define CHECK_REF_FORMAT_ONELEVEL (-2)
79 #define CHECK_REF_FORMAT_WILDCARD (-3)
80 extern int check_ref_format(const char *target);
82 extern const char *prettify_ref(const struct ref *ref);
84 /** rename ref, return 0 on success **/
85 extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
87 /** resolve ref in nested "gitlink" repository */
88 extern int resolve_gitlink_ref(const char *name, const char *refname, unsigned char *result);
90 /** lock a ref and then write its file */
91 enum action_on_err { MSG_ON_ERR, DIE_ON_ERR, QUIET_ON_ERR };
92 int update_ref(const char *action, const char *refname,
93 const unsigned char *sha1, const unsigned char *oldval,
94 int flags, enum action_on_err onerr);