Avoid ascking for a tty in Jenkins Pipeline

scripts/ruby

@@ -1,6 +1,13 @@
 #!/bin/sh
 
-exec docker run --rm -ti \
+# If we're executing from a normal shell, allow input. If we're in a
+# subprocess, like under Jenkins Pipeline, don't allow it
+tty --quiet
+if [ $? -eq 0 ]; then
+    TTY_ARGS="-ti"
+fi;
+
+exec docker run --rm ${TTY_ARGS} \
     -u $(id -u):$(id -g) \
     -w ${PWD} \
     -v ${PWD}:${PWD} \