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#!/bin/bash
# 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; version 2 of the License.
#
# 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 General Public License for more details.
m4_include(lib/common.sh)
CHROOT_VERSION='v2'
FORCE='n'
RUN=''
NOCOPY='n'
working_dir=''
APPNAME=$(basename "${0}")
# usage: usage <exitvalue>
usage() {
echo "Usage: ${APPNAME} [options] working-dir [package-list | app]"
echo ' options:'
echo ' -r <app> Run "app" within the context of the chroot'
echo ' -u Update the chroot via pacman'
echo ' -f Force overwrite of files in the working-dir'
echo ' -C <file> Location of a pacman config file'
echo ' -M <file> Location of a makepkg config file'
echo ' -n Do not copy config files into the chroot'
echo ' -c <dir> Set pacman cache'
echo ' -h This message'
exit 1
}
while getopts 'r:ufnhC:M:c:' arg; do
case "${arg}" in
r) RUN="$OPTARG" ;;
u) RUN='/bin/sh -c "pacman -Syu --noconfirm && (pacman -Qqu >/dev/null && pacman -Su --noconfirm || exit 0)"' ;;
f) FORCE='y' ;;
C) pac_conf="$OPTARG" ;;
M) makepkg_conf="$OPTARG" ;;
n) NOCOPY='y' ;;
c) cache_dir="$OPTARG" ;;
h|?) usage ;;
*) error "invalid argument '${arg}'"; usage ;;
esac
done
if (( $EUID != 0 )); then
die 'This script must be run as root.'
fi
shift $(($OPTIND - 1))
if [[ -z $RUN ]] && (( $# < 2 )); then
die 'You must specify a directory and one or more packages.'
elif (( $# < 1 )); then
die 'You must specify a directory.'
fi
working_dir="$(readlink -f ${1})"
shift 1
[[ -z $working_dir ]] && die 'Please specify a working directory.'
if [[ -z $cache_dir ]]; then
cache_dirs=($(pacman -v $cache_conf 2>&1 | grep '^Cache Dirs:' | sed 's/Cache Dirs:\s*//g'))
else
cache_dirs=(${cache_dir})
fi
host_mirror=$(pacman -Sddp extra/devtools 2>/dev/null | sed -E 's#(.*/)extra/os/.*#\1$repo/os/$arch#')
if echo "${host_mirror}" | grep -q 'file://'; then
host_mirror_path=$(echo "${host_mirror}" | sed -E 's#file://(/.*)/\$repo/os/\$arch#\1#g')
fi
# {{{ functions
build_mount_args() {
local p
declare -g mount_args=()
if [[ -n $host_mirror_path ]]; then
printf -v p '%q' "$host_mirror_path"
mount_args+=(--bind-ro="$p")
fi
printf -v p '%q' "${cache_dirs[0]}"
mount_args+=(--bind="$p")
for cache_dir in ${cache_dirs[@]:1}; do
printf -v p '%q' "$cache_dir"
mount_args+=(--bind-ro="$p")
done
}
copy_hostconf () {
cp -a /etc/pacman.d/gnupg "${working_dir}/etc/pacman.d"
echo "Server = ${host_mirror}" > ${working_dir}/etc/pacman.d/mirrorlist
if [[ -n $pac_conf && $NOCOPY = 'n' ]]; then
cp ${pac_conf} ${working_dir}/etc/pacman.conf
fi
if [[ -n $makepkg_conf && $NOCOPY = 'n' ]]; then
cp ${makepkg_conf} ${working_dir}/etc/makepkg.conf
fi
sed -r "s|^#?\\s*CacheDir.+|CacheDir = $(echo -n ${cache_dirs[@]})|g" -i ${working_dir}/etc/pacman.conf
}
chroot_lock () {
# Only reopen the FD if it wasn't handed to us
if [[ $(readlink -f /dev/fd/9) != "${working_dir}.lock" ]]; then
exec 9>"${working_dir}.lock"
fi
# Lock the chroot. Take note of the FD number.
if ! flock -n 9; then
stat_busy "Locking chroot"
flock 9
stat_done
fi
}
chroot_run() {
local dir=$1
shift
eval systemd-nspawn -D "${dir}" "${mount_args[@]}" -- ${@} 2>/dev/null
}
# }}}
umask 0022
if [[ -n $RUN ]]; then
# run chroot {{{
#Sanity check
if [[ ! -f "${working_dir}/.arch-chroot" ]]; then
die "'${working_dir}' does not appear to be a Arch chroot."
elif [[ $(cat "${working_dir}/.arch-chroot") != ${CHROOT_VERSION} ]]; then
die "'${working_dir}' is not compatible with ${APPNAME} version ${CHROOT_VERSION}. Please rebuild."
fi
chroot_lock
build_mount_args
copy_hostconf
chroot_run "${working_dir}" ${RUN}
# }}}
else
# {{{ build chroot
if [[ -e $working_dir && $FORCE = 'n' ]]; then
die "Working directory '${working_dir}' already exists - try using -f"
fi
if [[ ! -d "${working_dir}" ]]; then
mkdir -p "${working_dir}"
fi
if { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then
chmod 0755 "${working_dir}"
fi
chroot_lock
pacargs=("${cache_dirs[@]/#/--cachedir=}")
if [[ -n $pac_conf ]]; then
pacargs+=("--config=${pac_conf}")
fi
if [[ $FORCE = 'y' ]]; then
pacargs+=("--force")
fi
if ! pacstrap -GMcd "${working_dir}" "${pacargs[@]}" "$@"; then
die 'Failed to install all packages'
fi
printf '%s.UTF-8 UTF-8\n' en_US de_DE > "${working_dir}/etc/locale.gen"
chroot_run "${working_dir}" locale-gen
echo 'LANG=C' > "${working_dir}/etc/locale.conf"
copy_hostconf
echo "${CHROOT_VERSION}" > "${working_dir}/.arch-chroot"
# }}}
fi
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