#! /bin/sh set -e case "$1" in install|upgrade) mkdir -p /var/lib/pycentral echo '# the presence of this file allows calling pkgremove on upgrade' \ > /var/lib/pycentral/pkgremove ;; abort-upgrade) ;; *) echo "preinst called with unknown argument \`$1'" >&2 exit 1 ;; esac exit 0