Andrew's git - gitweb.git/blob

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