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 extern int for_each_glob_ref_in(each_ref_fn, const char *pattern, const char* prefix, void *);
  30
  31 static inline const char *has_glob_specials(const char *pattern)
  32 {
  33         return strpbrk(pattern, "?*[");
  34 }
  35
  36 /* can be used to learn about broken ref and symref */
  37 extern int for_each_rawref(each_ref_fn, void *);
  38
  39 extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
  40
  41 /*
  42  * Extra refs will be listed by for_each_ref() before any actual refs
  43  * for the duration of this process or until clear_extra_refs() is
  44  * called. Only extra refs added before for_each_ref() is called will
  45  * be listed on a given call of for_each_ref().
  46  */
  47 extern void add_extra_ref(const char *refname, const unsigned char *sha1, int flags);
  48 extern void clear_extra_refs(void);
  49
  50 extern int peel_ref(const char *, unsigned char *);
  51
  52 /** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
  53 extern struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1);
  54
  55 /** Locks any ref (for 'HEAD' type refs). */
  56 #define REF_NODEREF     0x01
  57 extern struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags);
  58
  59 /** Close the file descriptor owned by a lock and return the status */
  60 extern int close_ref(struct ref_lock *lock);
  61
  62 /** Close and commit the ref locked by the lock */
  63 extern int commit_ref(struct ref_lock *lock);
  64
  65 /** Release any lock taken but not written. **/
  66 extern void unlock_ref(struct ref_lock *lock);
  67
  68 /** Writes sha1 into the ref specified by the lock. **/
  69 extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg);
  70
  71 /** Setup reflog before using. **/
  72 int log_ref_setup(const char *ref_name, char *logfile, int bufsize);
  73
  74 /** Reads log for the value of ref during at_time. **/
  75 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);
  76
  77 /* iterate over reflog entries */
  78 typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
  79 int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
  80 int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long, void *cb_data);
  81
  82 /*
  83  * Calls the specified function for each reflog file until it returns nonzero,
  84  * and returns the value
  85  */
  86 extern int for_each_reflog(each_ref_fn, void *);
  87
  88 #define CHECK_REF_FORMAT_OK 0
  89 #define CHECK_REF_FORMAT_ERROR (-1)
  90 #define CHECK_REF_FORMAT_ONELEVEL (-2)
  91 #define CHECK_REF_FORMAT_WILDCARD (-3)
  92 extern int check_ref_format(const char *target);
  93
  94 extern const char *prettify_refname(const char *refname);
  95 extern char *shorten_unambiguous_ref(const char *ref, int strict);
  96
  97 /** rename ref, return 0 on success **/
  98 extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
  99
 100 /** resolve ref in nested "gitlink" repository */
 101 extern int resolve_gitlink_ref(const char *name, const char *refname, unsigned char *result);
 102
 103 /** lock a ref and then write its file */
 104 enum action_on_err { MSG_ON_ERR, DIE_ON_ERR, QUIET_ON_ERR };
 105 int update_ref(const char *action, const char *refname,
 106                 const unsigned char *sha1, const unsigned char *oldval,
 107                 int flags, enum action_on_err onerr);
 108
 109 #endif /* REFS_H */