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732232a123
Normally we try to skip writing a ref if its value hasn't changed
but in the special case that the ref doesn't exist but the new
value is going to be 0{40} then force writing the ref anyway.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
#ifndef REFS_H
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#define REFS_H
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struct ref_lock {
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char *ref_file;
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char *lock_file;
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char *log_file;
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unsigned char old_sha1[20];
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int lock_fd;
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int force_write;
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};
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/*
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* Calls the specified function for each ref file until it returns nonzero,
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* and returns the value
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*/
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extern int head_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_tag_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_branch_ref(int (*fn)(const char *path, const unsigned char *sha1));
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extern int for_each_remote_ref(int (*fn)(const char *path, const unsigned char *sha1));
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/** Reads the refs file specified into sha1 **/
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extern int get_ref_sha1(const char *ref, unsigned char *sha1);
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/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
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extern struct ref_lock* lock_ref_sha1(const char *ref, const unsigned char *old_sha1, int mustexist);
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/** Locks any ref (for 'HEAD' type refs). */
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extern struct ref_lock* lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int mustexist);
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/** Release any lock taken but not written. **/
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extern void unlock_ref (struct ref_lock *lock);
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/** Writes sha1 into the ref specified by the lock. **/
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extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
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/** Reads log for the value of ref during at_time. **/
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extern int read_ref_at(const char *ref, unsigned long at_time, unsigned char *sha1);
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/** Returns 0 if target has the right format for a ref. **/
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extern int check_ref_format(const char *target);
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#endif /* REFS_H */
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