Add "SRC" mode to preserve file modes from repository

src/include/deploy.sh

@@ -40,6 +40,7 @@ __deploy_item() {
                 __deploy_item "$item" "$dst${item#$src}" "$mode"
             done
     else
+        test "$mode" == "SRC" && mode=$(stat -c "%a" "$src")
         __maybe install -DTvm "$mode" "$src" "$dst"
     fi
 }