PREIN

/bin/sh

getent group spack >/dev/null || groupadd -r spack
getent passwd spack >/dev/null || \
  useradd -c "Spack package manager" -g spack -d /var/lib/spack -M -r -s /sbin/nologin spack
  mkdir -p /opt/spack
  chown spack:spack /opt/spack
  chmod ug+rwx /opt/spack
exit 0