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|
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
#
# Assumptions:
# 1) User has partitioned, formatted, and mounted partitions on /mnt
# 2) Network is functional
# 3) Arguments passed to the script are valid pacman targets
# 4) A valid mirror appears in /etc/pacman.d/mirrorlist
#
shopt -s extglob
hostcache=0
copykeyring=1
initkeyring=0
copymirrorlist=1
pacman_args=()
pacmode=-Sy
unshare=0
copyconf=0
pacman_config=/etc/pacman.conf
m4_include(common)
usage() {
cat <<EOF
usage: ${0##*/} [options] root [packages...]
Options:
-C <config> Use an alternate config file for pacman
-c Use the package cache on the host, rather than the target
-D Skip pacman dependency checks
-G Avoid copying the host's pacman keyring to the target
-i Prompt for package confirmation when needed (run interactively)
-K Initialize an empty pacman keyring in the target (implies '-G')
-M Avoid copying the host's mirrorlist to the target
-N Run in unshare mode as a regular user
-P Copy the host's pacman config to the target
-U Use pacman -U to install packages
-h Print this help message
pacstrap installs packages to the specified new root directory. If no packages
are given, pacstrap defaults to the "base" group.
EOF
}
pacstrap() {
(( EUID == 0 )) || die 'This script must be run with root privileges'
db_dir="/var/lib/pacman/"
gpg_dir="/etc/pacman.d/gnupg/"
log_dir="/var/log/"
# These can contain multiple paths. Ensure they are arrays
cache_dirs=("/var/cache/pacman/pkg/")
# Ensure we only override dirs if we copy the config
if (( copyconf )); then
db_dir="$(pacman-conf -c "$pacman_config" DBPath)"
gpg_dir="$(pacman-conf -c "$pacman_config" GPGDir)"
log_dir="$(dirname "$(pacman-conf -c "$pacman_config" LogFile)")"
mapfile -t cache_dirs < <( pacman-conf -c "$pacman_config" CacheDir )
fi
# create obligatory directories
msg 'Creating install root at %s' "$newroot"
# shellcheck disable=SC2174 # permissions are perfectly fine here
mkdir -m 0755 -p "$newroot/$db_dir" \
"$newroot/$log_dir" \
"$newroot"/etc/pacman.d
for path in "${cache_dirs[@]}"; do
# shellcheck disable=SC2174 # permissions are perfectly fine here
mkdir -m 0755 -p "$newroot/$path"
done
# shellcheck disable=SC2174 # permissions are perfectly fine here
mkdir -m 0555 -p "$newroot"/{run,dev,sys,proc}
# shellcheck disable=SC2174 # permissions are perfectly fine here
mkdir -m 1777 -p "$newroot"/tmp
if (( ! hostcache )); then
for path in "${cache_dirs[@]}"; do
pacman_args+=(--cachedir="$newroot/$path")
done
fi
# mount API filesystems
chroot_init
$setup "$newroot" || die "failed to setup chroot %s" "$newroot"
if [[ ! -d $newroot/$gpg_dir ]]; then
if (( initkeyring )); then
pacman-key --gpgdir "$newroot/$gpg_dir" --init
elif (( copykeyring )) && [[ -d $gpg_dir ]]; then
# if there's a keyring on the host, copy it into the new root
cp -a --no-preserve=ownership "$gpg_dir" "$newroot/$gpg_dir"
fi
fi
msg 'Installing packages to %s' "$newroot"
if ! $pid_unshare pacman -b "$newroot/$db_dir" -r "$newroot" "${pacman_args[@]}"; then
die 'Failed to install packages to new root'
fi
if (( copymirrorlist )); then
# install the host's mirrorlist onto the new root
cp -a /etc/pacman.d/mirrorlist "$newroot/etc/pacman.d/"
fi
if (( copyconf )); then
cp -a "$pacman_config" "$newroot/etc/pacman.conf"
fi
}
if [[ -z $1 || $1 = @(-h|--help) ]]; then
usage
exit $(( $# ? 0 : 1 ))
fi
while getopts ':C:cDGiKMNPU' flag; do
case $flag in
C)
pacman_config=$OPTARG
;;
D)
pacman_args+=(-dd)
;;
c)
hostcache=1
;;
i)
interactive=1
;;
G)
copykeyring=0
;;
K)
initkeyring=1
;;
M)
copymirrorlist=0
;;
N)
unshare=1
;;
P)
copyconf=1
;;
U)
pacmode=-U
;;
:)
die '%s: option requires an argument -- '\''%s'\' "${0##*/}" "$OPTARG"
;;
?)
die '%s: invalid option -- '\''%s'\' "${0##*/}" "$OPTARG"
;;
esac
done
shift $(( OPTIND - 1 ))
(( $# )) || die "No root directory specified"
newroot=$1
shift
[[ -d $newroot ]] || die "%s is not a directory" "$newroot"
tmpfile="$(mktemp -t pacman.conf.XXXX)"
cp "$pacman_config" "$tmpfile"
sed -i 's/^DownloadUser/#&/' "$tmpfile"
pacman_args+=("$pacmode" "${@:-base}" --config="$tmpfile" --disable-sandbox)
if (( ! interactive )); then
pacman_args+=(--noconfirm)
fi
if (( unshare )); then
setup=unshare_setup
$mount_unshare bash -c "$(declare_all); pacstrap"
else
setup=chroot_setup
pacstrap
fi
# TODO: There is a trap check on exit. Need to rework the trap handling with
# hook-ins/callbacks to remove aux files
rm "$tmpfile"
|
