fix rewritekey lock on sqlite

Author: lunny

models/ssh_key.go

@@ -549,6 +549,7 @@ func DeletePublicKey(doer *User, id int64) (err error) {
 	if err = sess.Commit(); err != nil {
 		return err
 	}
+	sess.Close()
 
 	return RewriteAllPublicKeys()
 }
@@ -557,6 +558,10 @@ func DeletePublicKey(doer *User, id int64) (err error) {
 // Note: x.Iterate does not get latest data after insert/delete, so we have to call this function
 // outside any session scope independently.
 func RewriteAllPublicKeys() error {
+	return rewriteAllPublicKeys(x)
+}
+
+func rewriteAllPublicKeys(e Engine) error {
 	//Don't rewrite key if internal server
 	if setting.SSH.StartBuiltinServer || !setting.SSH.CreateAuthorizedKeysFile {
 		return nil
@@ -583,7 +588,7 @@ func RewriteAllPublicKeys() error {
 		}
 	}
 
-	err = x.Iterate(new(PublicKey), func(idx int, bean interface{}) (err error) {
+	err = e.Iterate(new(PublicKey), func(idx int, bean interface{}) (err error) {
 		_, err = t.WriteString((bean.(*PublicKey)).AuthorizedString())
 		return err
 	})

models/user.go

@@ -1026,7 +1026,7 @@ func deleteUser(e *xorm.Session, u *User) error {
 	if _, err = e.Delete(&PublicKey{OwnerID: u.ID}); err != nil {
 		return fmt.Errorf("deletePublicKeys: %v", err)
 	}
-	RewriteAllPublicKeys()
+	rewriteAllPublicKeys(e)
 	// ***** END: PublicKey *****
 
 	// ***** START: GPGPublicKey *****
@@ -1088,6 +1088,7 @@ func DeleteUser(u *User) (err error) {
 	if err = sess.Commit(); err != nil {
 		return err
 	}
+	sess.Close()
 
 	return RewriteAllPublicKeys()
 }