Merge branch 'tf/imap-send-create'

diff --git a/refs.h b/refs.h
index 82cc5cb2a1690d7c8317746c6eb03ef1db7c55db..ec46acdde7b67d3531a4c0e18d33901d2a4f307a 100644 (file)
--- a/refs.h
+++ b/refs.h
@@ -98,6 +98,7 @@ extern void add_packed_ref(const char *refname, const unsigned char *sha1);
  * Write the current version of the packed refs cache from memory to
  * disk.  The packed-refs file must already be locked for writing (see
  * lock_packed_refs()).  Return zero on success.
+ * Sets errno to something meaningful on error.
  */
 extern int commit_packed_refs(void);
 
@@ -127,6 +128,8 @@ extern int repack_without_refs(const char **refnames, int n,
 
 extern int ref_exists(const char *);
 
+extern int is_branch(const char *refname);
+
 /*
  * If refname is a non-symbolic reference that refers to a tag object,
  * and the tag can be (recursively) dereferenced to a non-tag object,
@@ -137,11 +140,15 @@ extern int ref_exists(const char *);
  */
 extern int peel_ref(const char *refname, unsigned char *sha1);
 
-/** Locks a "refs/" ref returning the lock on success and NULL on failure. **/
+/*
+ * Locks a "refs/" ref returning the lock on success and NULL on failure.
+ * On failure errno is set to something meaningful.
+ */
 extern struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1);
 
 /** Locks any ref (for 'HEAD' type refs). */
 #define REF_NODEREF    0x01
+/* errno is set to something meaningful on failure */
 extern struct ref_lock *lock_any_ref_for_update(const char *refname,
                                                const unsigned char *old_sha1,
                                                int flags, int *type_p);
@@ -241,12 +248,16 @@ struct ref_transaction *ref_transaction_begin(void);
  * be deleted.  If have_old is true, then old_sha1 holds the value
  * that the reference should have had before the update, or zeros if
  * it must not have existed beforehand.
+ * Function returns 0 on success and non-zero on failure. A failure to update
+ * means that the transaction as a whole has failed and will need to be
+ * rolled back. On failure the err buffer will be updated.
  */
-void ref_transaction_update(struct ref_transaction *transaction,
-                           const char *refname,
-                           const unsigned char *new_sha1,
-                           const unsigned char *old_sha1,
-                           int flags, int have_old);
+int ref_transaction_update(struct ref_transaction *transaction,
+                          const char *refname,
+                          const unsigned char *new_sha1,
+                          const unsigned char *old_sha1,
+                          int flags, int have_old,
+                          struct strbuf *err);
 
 /*
  * Add a reference creation to transaction.  new_sha1 is the value
@@ -277,8 +288,7 @@ void ref_transaction_delete(struct ref_transaction *transaction,
  * the transaction failed. The string does not end in newline.
  */
 int ref_transaction_commit(struct ref_transaction *transaction,
-                          const char *msg, struct strbuf *err,
-                          enum action_on_err onerr);
+                          const char *msg, struct strbuf *err);
 
 /*
  * Free an existing transaction and all associated data.