rev-parse --glob
[git/git.git] / refs.h
1 #ifndef REFS_H
2 #define REFS_H
3
4 struct ref_lock {
5 char *ref_name;
6 char *orig_ref_name;
7 struct lock_file *lk;
8 unsigned char old_sha1[20];
9 int lock_fd;
10 int force_write;
11 };
12
13 #define REF_ISSYMREF 01
14 #define REF_ISPACKED 02
15
16 /*
17 * Calls the specified function for each ref file until it returns nonzero,
18 * and returns the value
19 */
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_ref_in(const char *, each_ref_fn, void *);
24 extern int for_each_tag_ref(each_ref_fn, void *);
25 extern int for_each_branch_ref(each_ref_fn, void *);
26 extern int for_each_remote_ref(each_ref_fn, void *);
27 extern int for_each_replace_ref(each_ref_fn, void *);
28 extern int for_each_glob_ref(each_ref_fn, const char *pattern, void *);
29
30 /* can be used to learn about broken ref and symref */
31 extern int for_each_rawref(each_ref_fn, void *);
32
33 extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
34
35 /*
36 * Extra refs will be listed by for_each_ref() before any actual refs
37 * for the duration of this process or until clear_extra_refs() is
38 * called. Only extra refs added before for_each_ref() is called will
39 * be listed on a given call of for_each_ref().
40 */
41 extern void add_extra_ref(const char *refname, const unsigned char *sha1, int flags);
42 extern void clear_extra_refs(void);
43
44 extern int peel_ref(const char *, unsigned char *);
45
46 /** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
47 extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
48
49 /** Locks any ref (for 'HEAD' type refs). */
50 #define REF_NODEREF 0x01
51 extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags);
52
53 /** Close the file descriptor owned by a lock and return the status */
54 extern int close_ref(struct ref_lock *lock);
55
56 /** Close and commit the ref locked by the lock */
57 extern int commit_ref(struct ref_lock *lock);
58
59 /** Release any lock taken but not written. **/
60 extern void unlock_ref(struct ref_lock *lock);
61
62 /** Writes sha1 into the ref specified by the lock. **/
63 extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
64
65 /** Reads log for the value of ref during at_time. **/
66 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);
67
68 /* iterate over reflog entries */
69 typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
70 int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
71 int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long, void *cb_data);
72
73 /*
74 * Calls the specified function for each reflog file until it returns nonzero,
75 * and returns the value
76 */
77 extern int for_each_reflog(each_ref_fn, void *);
78
79 #define CHECK_REF_FORMAT_OK 0
80 #define CHECK_REF_FORMAT_ERROR (-1)
81 #define CHECK_REF_FORMAT_ONELEVEL (-2)
82 #define CHECK_REF_FORMAT_WILDCARD (-3)
83 extern int check_ref_format(const char *target);
84
85 extern const char *prettify_refname(const char *refname);
86 extern char *shorten_unambiguous_ref(const char *ref, int strict);
87
88 /** rename ref, return 0 on success **/
89 extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
90
91 /** resolve ref in nested "gitlink" repository */
92 extern int resolve_gitlink_ref(const char *name, const char *refname, unsigned char *result);
93
94 /** lock a ref and then write its file */
95 enum action_on_err { MSG_ON_ERR, DIE_ON_ERR, QUIET_ON_ERR };
96 int update_ref(const char *action, const char *refname,
97 const unsigned char *sha1, const unsigned char *oldval,
98 int flags, enum action_on_err onerr);
99
100 #endif /* REFS_H */