added recursive flag for working with folders

Author: AlexanderMelde

entrypoint.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 set -e
 echo "Checking formatting for $GITHUB_REPOSITORY"
-sh -c "yapf --diff $GITHUB_WORKSPACE"
+sh -c "yapf --diff --recursive $GITHUB_WORKSPACE"