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path: root/src/chroot-tools/chcleanup.in
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#!/usr/bin/env bash
# Copyright (C) 2011-2012 Nicolás Reynolds <fauno@parabola.nu>
# Copyright (C) 2012-2013, 2015, 2017-2018 Luke Shumaker <lukeshu@parabola.nu>
#
# If you don't see m4_include(...) below, but see function definitions
# for msg() et al., then this is a generated file, and contains some
# code from librelib.  See the source distribution for full copyright
# information.
#
# License: GNU GPLv3+
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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 General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Performs chroot cleanup smartly, it only removes the unneeded packages or
# leaves you with a cleansystem
#
# See: HOOKPREBUILD

set -eE

DRYRUN=${DRYRUN:-false}

# Statically include various library routines to avoid having
# dependencies on outside files.
[[ -n ${TEXTDOMAIN:-}    ]] || export TEXTDOMAIN='libretools'
[[ -n ${TEXTDOMAINDIR:-} ]] || export TEXTDOMAINDIR='/usr/share/locale'

if type gettext &>/dev/null; then
	_() { gettext "$@"; }
else
	_() { echo "$@"; }
fi
# Begin chcleanup.lib ##########################################################
m4_include(chcleanup.lib)
# End chcleanup.lib ############################################################

if [[ ! -f /.arch-chroot ]] && ! ${DRYRUN}; then
	error "(chcleanup): Must be run inside of a chroot"
	exit 1
fi

# Note: the in-chroot pkgconfdir is non-configurable, this is
# intentionally hard-coded.
source /etc/libretools.d/chroot.conf
# If we're running makepkg
if [[ -f ./PKGBUILD ]]; then
	if [[ ! -f ./.SRCINFO || ./PKGBUILD -nt ./.SRCINFO ]]; then
		sudo -u "#$(stat -c %u -- ./PKGBUILD)" sh -c 'makepkg --printsrcinfo > .SRCINFO'
	fi
	CARCH="$(. /etc/makepkg.conf; printf '%s' "$CARCH")"
	mapfile -t DEPENDS < <(sed -nE "s/^\\s+(|make|check)depends(|_${CARCH}) = //p" < .SRCINFO)
else
	DEPENDS=()
fi

msg "Cleaning chroot..."

# Sync the local repo with pacman
cp /repo/repo.db /var/lib/pacman/sync/repo.db

# Setup the temporary directory
TEMPDIR="$(mktemp --tmpdir -d "${0##*/}.XXXXXXXXXX")"
trap "rm -rf -- ${TEMPDIR@Q}" EXIT

cp -a /var/lib/pacman/sync "${TEMPDIR}/"
pkglist="${TEMPDIR}"/pkglist.txt

# Get the full list of packages needed by dependencies, including the base system
msg2 "Creating a full list of packages..."
pacman --dbpath="$TEMPDIR" --hookdir=/var/empty -Sq --needed --dbonly --noconfirm -- base-devel >/dev/null
if (( ${#CHROOTEXTRAPKG[@]} > 0 )); then
	pacman --dbpath="$TEMPDIR" --hookdir=/var/empty -Sq --needed --dbonly --noconfirm -- "${CHROOTEXTRAPKG[@]}" >/dev/null
fi
if (( ${#DEPENDS[@]} > 0 )); then
	pacman --dbpath="$TEMPDIR" --hookdir=/var/empty -Sq --needed --dbonly --noconfirm -- "${DEPENDS[@]}" >/dev/null
fi
pacman --dbpath="$TEMPDIR" -Qq >"$pkglist"

# Diff installed packages against a clean chroot then remove leftovers
packages=($(comm -23 <(pacman -Qq | sort -u) \
                     <(sort -u "${pkglist}")))
if [[ ${#packages[@]} = 0 ]]; then
	msg2 "No packages to remove"
else
	msg2 "Removing %d packages" ${#packages[@]}

	if ${DRYRUN}; then
		echo "${packages[*]}"
	else
		# Only remove leftovers, -Rcs removes too much
		pacman --noconfirm -R --nosave "${packages[@]}"
	fi
fi

packages=($(comm -13 <(pacman -Qq | sort -u) \
                     <(sort -u "${pkglist}")))
if [[ ${#packages[@]} = 0 ]]; then
	msg2 "No packages to add"
else
	msg2 "Adding %d packages" ${#packages[@]}

	if ${DRYRUN}; then
		echo "${packages[*]}"
	else
		pacman --noconfirm -S "${packages[@]}"
	fi
fi