#!/bin/sh
# preinst script for puppet-common
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <new-preinst> `install'
#        * <new-preinst> `install' <old-version>
#        * <new-preinst> `upgrade' <old-version>
#        * <old-preinst> `abort-upgrade' <new-version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package

# The "postrm" of the "puppet-common" package in puppet 3.x contains a
# harmful "rm -rf /var/lib/puppet". which is called when that package
# is purged.
#
# This function rewrites /var/lib/dpkg/info/puppet-common.postrm to
# prevent data loss.  See https://bugs.debian.org/825719 for more
# information.
defang_puppet_common_postrm() {
    sed -i -e 's|^\([[:space:]]*\)\(rm -rf /var/lib/puppet\)|\1: disabled by puppet.preinst : \2|g' \
	/var/lib/dpkg/info/puppet-common.postrm
}

case "$1" in
    install)

        # handle "puppet-common" removing /var/lib/puppet on purge
        # ("puppet" replaces "puppet-common")
        if [ -e '/var/lib/dpkg/info/puppet-common.postrm' ]; then
		defang_puppet_common_postrm
	fi
        ;;

    upgrade)

        # handle "puppet-common" removing /var/lib/puppet on purge
        # ("puppet" replaces "puppet-common")
        if dpkg --compare-versions "$2" lt "4.5.0-4~" && \
           [ -e '/var/lib/dpkg/info/puppet-common.postrm' ]; then
		defang_puppet_common_postrm
	fi
        ;;

    abort-upgrade)
        ;;

    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 1
        ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.



exit 0