summaryrefslogtreecommitdiff
path: root/refs.h
blob: 2f6a8af6081245d626a724258dfa7c8d1a65c4ec (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
#ifndef REFS_H
#define REFS_H
 
struct ref_lock {
	char *ref_name;
	char *orig_ref_name;
	struct lock_file *lk;
	unsigned char old_sha1[20];
	int lock_fd;
	int force_write;
};
 
#define REF_ISSYMREF 01
#define REF_ISPACKED 02
 
/*
 * Calls the specified function for each ref file until it returns nonzero,
 * and returns the value
 */
typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
extern int head_ref(each_ref_fn, void *);
extern int for_each_ref(each_ref_fn, void *);
extern int for_each_ref_in(const char *, each_ref_fn, void *);
extern int for_each_tag_ref(each_ref_fn, void *);
extern int for_each_branch_ref(each_ref_fn, void *);
extern int for_each_remote_ref(each_ref_fn, void *);
 
/* can be used to learn about broken ref and symref */
extern int for_each_rawref(each_ref_fn, void *);
 
extern void warn_dangling_symref(const char *msg_fmt, const char *refname);
 
/*
 * Extra refs will be listed by for_each_ref() before any actual refs
 * for the duration of this process or until clear_extra_refs() is
 * called. Only extra refs added before for_each_ref() is called will
 * be listed on a given call of for_each_ref().
 */
extern void add_extra_ref(const char *refname, const unsigned char *sha1, int flags);
extern void clear_extra_refs(void);
 
extern int peel_ref(const char *, unsigned char *);
 
/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
 
/** Locks any ref (for 'HEAD' type refs). */
#define REF_NODEREF	0x01
extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags);
 
/** Close the file descriptor owned by a lock and return the status */
extern int close_ref(struct ref_lock *lock);
 
/** Close and commit the ref locked by the lock */
extern int commit_ref(struct ref_lock *lock);
 
/** Release any lock taken but not written. **/
extern void unlock_ref(struct ref_lock *lock);
 
/** Writes sha1 into the ref specified by the lock. **/
extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
 
/** Reads log for the value of ref during at_time. **/
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);
 
/* iterate over reflog entries */
typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long, void *cb_data);
 
/*
 * Calls the specified function for each reflog file until it returns nonzero,
 * and returns the value
 */
extern int for_each_reflog(each_ref_fn, void *);
 
#define CHECK_REF_FORMAT_OK 0
#define CHECK_REF_FORMAT_ERROR (-1)
#define CHECK_REF_FORMAT_ONELEVEL (-2)
#define CHECK_REF_FORMAT_WILDCARD (-3)
extern int check_ref_format(const char *target);
 
extern const char *prettify_ref(const struct ref *ref);
 
/** rename ref, return 0 on success **/
extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
 
/** resolve ref in nested "gitlink" repository */
extern int resolve_gitlink_ref(const char *name, const char *refname, unsigned char *result);
 
/** lock a ref and then write its file */
enum action_on_err { MSG_ON_ERR, DIE_ON_ERR, QUIET_ON_ERR };
int update_ref(const char *action, const char *refname,
		const unsigned char *sha1, const unsigned char *oldval,
		int flags, enum action_on_err onerr);
 
#endif /* REFS_H */