Add repository location parsing code

backend/local/uri.go

@@ -0,0 +1,15 @@
+package local
+
+import (
+	"errors"
+	"strings"
+)
+
+// ParseConfig parses a local backend config.
+func ParseConfig(cfg string) (interface{}, error) {
+	if !strings.HasPrefix(cfg, "local:") {
+		return nil, errors.New(`invalid format, prefix "local" not found`)
+	}
+
+	return cfg[6:], nil
+}