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#!/bin/sh
#
# Copyright (C) 2012,2014,2016 Etersoft
# Copyright (C) 2012,2014,2016 Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
load_helper epm-check_updated_repo
__epm_add_alt_apt_downgrade_preferences()
{
[ -r /etc/apt/preferences ] && fatal "/etc/apt/preferences already exists"
cat <<EOF | $SUDO tee /etc/apt/preferences
# main repo
Package: *
Pin: release c=classic
Pin-Priority: 1001
# overload with addon repo
Package: *
Pin: release c=addon
Pin-Priority: 1101
EOF
}
# See https://wiki.debian.org/ru/AptPreferences
__epm_add_deb_apt_downgrade_preferences()
{
[ -r /etc/apt/preferences ] && fatal "/etc/apt/preferences already exists"
info "Running with /etc/apt/preferences:"
cat <<EOF | $SUDO tee /etc/apt/preferences
Package: *
Pin: release a=stable
Pin-Priority: 1001
Package: *
Pin: release a=testing
Pin-Priority: 900
Package: *
Pin: release a=unstable
Pin-Priority: 800
EOF
}
__epm_remove_apt_downgrade_preferences()
{
sudocmd rm -f /etc/apt/preferences
}
epm_downgrade()
{
local CMD
# it is useful for first time running
update_repo_if_needed
info "Running command for downgrade packages"
case $PMTYPE in
apt-rpm)
__epm_add_alt_apt_downgrade_preferences || return
if [ -n "$pkg_filenames" ] ; then
sudocmd apt-get install $pkg_filenames
else
sudocmd apt-get dist-upgrade
fi
__epm_remove_apt_downgrade_preferences
;;
apt-dpkg)
__epm_add_deb_apt_downgrade_preferences || return
if [ -n "$pkg_filenames" ] ; then
sudocmd apt-get install $pkg_filenames
else
sudocmd apt-get dist-upgrade
fi
__epm_remove_apt_downgrade_preferences
;;
yum-rpm)
# can do update repobase automagically
if [ -n "$pkg_filenames" ] ; then
sudocmd yum downgrade $pkg_filenames
else
sudocmd yum distro-sync
fi
;;
dnf-rpm)
if [ -n "$pkg_filenames" ] ; then
sudocmd dnf downgrade $pkg_filenames
else
sudocmd dnf distro-sync
fi
;;
urpm-rpm)
assure_exists urpm-reposync urpm-tools
sudocmd urpm-reposync -v
;;
*)
fatal "Have no suitable command for $PMTYPE"
;;
esac
}