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#!/bin/bash
#
# SPDX-License-Identifier: GPL-3.0-or-later
m4_include(lib/common.sh)
m4_include(lib/archroot.sh)
# umask might have been changed in /etc/profile
# ensure that sane default is set again
umask 0022
working_dir=''
files=()
mount_args=()
usage() {
echo "Usage: ${0##*/} [options] working-dir [systemd-nspawn arguments]"
echo "A wrapper around systemd-nspawn. Provides support for pacman."
echo
echo ' options:'
echo ' -C <file> Location of a pacman config file'
echo ' -M <file> Location of a makepkg config file'
echo ' -c <dir> Set pacman cache'
echo ' -f <file> Copy file from the host to the chroot'
echo ' -s Do not run setarch'
echo ' -h This message'
exit 1
}
while getopts 'hC:M:c:f:s' arg; do
case "$arg" in
C) pac_conf="$OPTARG" ;;
M) makepkg_conf="$OPTARG" ;;
c) cache_dirs+=("$OPTARG") ;;
f) files+=("$OPTARG") ;;
s) nosetarch=1 ;;
h|?) usage ;;
*) error "invalid argument '%s'" "$arg"; usage ;;
esac
done
shift $((OPTIND - 1))
(( $# < 1 )) && die 'You must specify a directory.'
check_root
working_dir=$(readlink -f "$1")
shift 1
[[ -z $working_dir ]] && die 'Please specify a working directory.'
if (( ${#cache_dirs[@]} == 0 )); then
mapfile -t cache_dirs < <(pacman-conf --config "${pac_conf:-$working_dir/etc/pacman.conf}" CacheDir)
fi
# shellcheck disable=2016
host_mirrors=($(pacman-conf --config "${pac_conf:-$working_dir/etc/pacman.conf}" --repo extra Server 2> /dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#;t;s#(.*/)[^/]+/extra(/?)$#\1$arch/$repo\2#'))
for host_mirror in "${host_mirrors[@]}"; do
if [[ $host_mirror == *file://* ]]; then
host_mirror=$(echo "$host_mirror" | sed -r 's#file://(/.*)/\$repo/os/\$arch#\1#g')
for m in "$host_mirror"/pool/*/; do
in_array "$m" "${cache_dirs[@]}" || cache_dirs+=("$m")
done
fi
done
while read -r line; do
mapfile -t lines < <(pacman-conf --config "${pac_conf:-$working_dir/etc/pacman.conf}" \
--repo $line Server | sed -r 's#(.*/)[^/]+/os/.+#\1#')
for line in "${lines[@]}"; do
if [[ $line = file://* ]]; then
line=${line#file://}
in_array "$line" "${cache_dirs[@]}" || cache_dirs+=("$line")
fi
done
done < <(pacman-conf --config "${pac_conf:-$working_dir/etc/pacman.conf}" --repo-list)
mount_args+=("--bind=${cache_dirs[0]//:/\\:}")
for cache_dir in "${cache_dirs[@]:1}"; do
mount_args+=("--bind-ro=${cache_dir//:/\\:}")
done
# {{{ functions
copy_hostconf () {
unshare --fork --pid gpg --homedir "$working_dir"/etc/pacman.d/gnupg/ --no-permission-warning --quiet --batch --import --import-options import-local-sigs "$(pacman-conf GpgDir)"/pubring.gpg >/dev/null 2>&1
pacman-key --gpgdir "$working_dir"/etc/pacman.d/gnupg/ --import-trustdb "$(pacman-conf GpgDir)" >/dev/null 2>&1
printf 'Server = %s\n' "${host_mirrors[@]}" | \
tee "$working_dir/etc/pacman.d/mirrorlist" > \
"$working_dir/etc/pacman.d/mirrorlist32"
[[ -n $pac_conf ]] && cp "$pac_conf" "$working_dir/etc/pacman.conf"
[[ -n $makepkg_conf ]] && cp "$makepkg_conf" "$working_dir/etc/makepkg.conf"
local file
for file in "${files[@]}"; do
mkdir -p "$(dirname "$working_dir$file")"
cp -T "$file" "$working_dir$file"
done
sed -r "s|^#?\\s*CacheDir.+|CacheDir = ${cache_dirs[*]}|g" -i "$working_dir/etc/pacman.conf"
}
# }}}
umask 0022
# Sanity check
if [[ ! -f "$working_dir/.arch-chroot" ]]; then
die "'%s' does not appear to be an Arch chroot." "$working_dir"
elif [[ $(cat "$working_dir/.arch-chroot") != "$CHROOT_VERSION" ]]; then
die "chroot '%s' is not at version %s. Please rebuild." "$working_dir" "$CHROOT_VERSION"
fi
copy_hostconf
eval "$(grep -a '^CARCH=' "$working_dir/etc/makepkg.conf")"
if [[ -f "@pkgdatadir@/setarch-aliases.d/${CARCH}" ]]; then
read -r set_arch < "@pkgdatadir@/setarch-aliases.d/${CARCH}"
[ -z "${set_arch}" ] && unset set_arch
else
set_arch="${CARCH}"
fi
[[ -z $nosetarch ]] || unset set_arch
exec ${set_arch:+setarch "$set_arch"} systemd-nspawn -q \
-D "$working_dir" \
-E "PATH=/usr/local/sbin:/usr/local/bin:/usr/bin" \
--register=no --keep-unit --as-pid2 \
"${mount_args[@]}" \
"$@"
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