make reflog filename independent from struct ref_lock
[git/git.git] / refs.h
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1#ifndef REFS_H
2#define REFS_H
3
4bd18c43 4struct ref_lock {
434cd0cd 5 char *ref_name;
c33d5174 6 struct lock_file *lk;
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7 unsigned char old_sha1[20];
8 int lock_fd;
732232a1 9 int force_write;
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10};
11
f4204ab9
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12#define REF_ISSYMREF 01
13#define REF_ISPACKED 02
14
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15/*
16 * Calls the specified function for each ref file until it returns nonzero,
17 * and returns the value
18 */
8da19775 19typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
cb5d709f
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20extern int head_ref(each_ref_fn, void *);
21extern int for_each_ref(each_ref_fn, void *);
22extern int for_each_tag_ref(each_ref_fn, void *);
23extern int for_each_branch_ref(each_ref_fn, void *);
24extern int for_each_remote_ref(each_ref_fn, void *);
8a65ff76 25
cf0adba7
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26extern int peel_ref(const char *, unsigned char *);
27
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28/** Reads the refs file specified into sha1 **/
29extern int get_ref_sha1(const char *ref, unsigned char *sha1);
30
4bd18c43 31/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
4431fcc4 32extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
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33
34/** Locks any ref (for 'HEAD' type refs). */
4431fcc4 35extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1);
95fc7512 36
4bd18c43 37/** Release any lock taken but not written. **/
e5f38ec3 38extern void unlock_ref(struct ref_lock *lock);
95fc7512 39
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40/** Writes sha1 into the ref specified by the lock. **/
41extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
95fc7512 42
d556fae2 43/** Reads log for the value of ref during at_time. **/
16d7cc90 44extern 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);
d556fae2 45
2ff81662 46/* iterate over reflog entries */
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47typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
48int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
2ff81662 49
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50/** Returns 0 if target has the right format for a ref. **/
51extern int check_ref_format(const char *target);
52
c976d415 53/** rename ref, return 0 on success **/
678d0f4c 54extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
c976d415 55
95fc7512 56#endif /* REFS_H */