#!/usr/bin/env bash
FAIL=0
if grep '^#!.*python' $@ | grep -v '#!/usr/bin/env python3$'; then
echo -e "Invalid shebang! Must use '#!/usr/bin/env python3'\n"
FAIL=1
fi
if grep '^#!.*bash' $@ | grep -v '#!/usr/bin/env bash$'; then
echo -e "Invalid shebang! Must use '#!/usr/bin/env bash'"
exit $FAIL