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-rw-r--r--mkarchroot.in302
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diff --git a/mkarchroot.in b/mkarchroot.in
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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.
+
+source @pkgdatadir@/common.sh
+
+CHROOT_VERSION='v2'
+
+FORCE='n'
+RUN=''
+NOCOPY='n'
+NONETWORK='n'
+
+working_dir=''
+
+APPNAME=$(basename "${0}")
+
+# usage: usage <exitvalue>
+usage() {
+ echo "Usage: ${APPNAME} [options] working-dir [action]"
+ echo ' options:'
+ 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 ' -N Disable networking in the chroot'
+ echo ' actions:'
+ echo ' -i <pkg-list> Install "pkg-list" in the chroot.'
+ echo ' Creates the chroot if necessary, workding-dir must exist'
+ echo ' -r <cmd> Run "cmd" within the context of the chroot'
+ echo ' -u Update the chroot via pacman'
+ echo ' -h Print this message'
+
+ exit ${1-1}
+}
+
+################################################################################
+
+while getopts 'fC:M:nc:Nh' arg; do
+ case "${arg}" in
+ f) FORCE='y' ;;
+ C) pac_conf="$OPTARG" ;;
+ M) makepkg_conf="$OPTARG" ;;
+ n) NOCOPY='y' ;;
+ c) cache_dir="$OPTARG" ;;
+ N) NONETWORK='y' ;;
+
+ h) action="-$arg" ;;
+
+ *) error "invalid argument '${arg}'"; usage ;;
+ esac
+done
+
+shift $(($OPTIND - 1))
+
+if (( $# < 2 )); then
+ error 'You must specify a directory and an action.'
+ usage
+fi
+
+working_dir="$(readlink -f "${1}")"
+shift 1
+[[ -z $working_dir ]] && die 'Please specify a working directory.'
+
+action=$1
+shift 1
+case "$action" in
+ -i) PKGS=("$@") ;;
+ -r) RUN="$*" ;;
+ -u)
+ (( $# > 0 )) && { error 'Extra arguments.'; usage; }
+ RUN='/bin/sh -c "pacman -Syu --noconfirm && (pacman -Qqu >/dev/null && pacman -Su --noconfirm || exit 0)"'
+ ;;
+ -h) usage 0 ;;
+ -*) error "invalid argument '${action#-}'"; usage ;;
+ *) error "invalid action '${action}'"; usage ;;
+esac
+unset action
+
+################################################################################
+
+if (( $EUID != 0 )); then
+ die 'This script must be run as root.'
+fi
+
+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
+bind_mount() {
+ local mode="${2:-rw}"
+ local target="${working_dir}${1}"
+
+ if [[ ! -e "$target" ]]; then
+ if [[ -d "$1" ]]; then
+ install -d "$target"
+ else
+ install -D /dev/null "$target"
+ fi
+ fi
+
+ mount -o bind "$1" "$target"
+ mount -o remount,${mode},bind "$target"
+ mount --make-slave "$target"
+}
+
+chroot_mount() {
+ trap 'trap_chroot_umount' EXIT INT QUIT TERM HUP
+
+ if (( ! have_nspawn )); then
+ bind_mount /sys ro
+
+ [[ -e "${working_dir}/proc" ]] || mkdir "${working_dir}/proc"
+ mount -t proc proc -o nosuid,noexec,nodev "${working_dir}/proc"
+ bind_mount /proc/sys ro
+
+ [[ -e "${working_dir}/dev" ]] || mkdir "${working_dir}/dev"
+ mount -t tmpfs dev "${working_dir}/dev" -o mode=0755,size=10M,nosuid,strictatime
+ mknod -m 666 "${working_dir}/dev/null" c 1 3
+ mknod -m 666 "${working_dir}/dev/zero" c 1 5
+ mknod -m 600 "${working_dir}/dev/console" c 5 1
+ mknod -m 644 "${working_dir}/dev/random" c 1 8
+ mknod -m 644 "${working_dir}/dev/urandom" c 1 9
+ mknod -m 666 "${working_dir}/dev/tty" c 5 0
+ mknod -m 666 "${working_dir}/dev/ptmx" c 5 2
+ mknod -m 666 "${working_dir}/dev/tty0" c 4 0
+ mknod -m 666 "${working_dir}/dev/full" c 1 7
+ mknod -m 666 "${working_dir}/dev/rtc0" c 254 0
+ ln -s /proc/kcore "${working_dir}/dev/core"
+ ln -s /proc/self/fd "${working_dir}/dev/fd"
+ ln -s /proc/self/fd/0 "${working_dir}/dev/stdin"
+ ln -s /proc/self/fd/1 "${working_dir}/dev/stdout"
+ ln -s /proc/self/fd/2 "${working_dir}/dev/stderr"
+
+ [[ -e "${working_dir}/dev/shm" ]] || mkdir "${working_dir}/dev/shm"
+ mount -t tmpfs shm "${working_dir}/dev/shm" -o nodev,nosuid,size=128M
+
+ bind_mount /dev/pts
+
+ [[ -e "${working_dir}/run" ]] || mkdir "${working_dir}/run"
+ mount -t tmpfs tmpfs "${working_dir}/run" -o mode=0755,nodev,nosuid,strictatime,size=64M
+
+ for host_config in resolv.conf localtime; do
+ bind_mount /etc/$host_config ro
+ done
+ fi
+
+ [[ -n $host_mirror_path ]] && bind_mount "$host_mirror_path" ro
+
+ bind_mount "${cache_dirs[0]}"
+ for cache_dir in ${cache_dirs[@]:1}; do
+ bind_mount "$cache_dir" ro
+ 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
+}
+
+trap_unmount_err () {
+ error "Error unmounting"
+}
+
+trap_chroot_umount () {
+ trap 'trap_unmount_err' INT QUIT TERM HUP EXIT
+
+ for cache_dir in ${cache_dirs[@]}; do
+ umount "${working_dir}/${cache_dir}"
+ done
+ [[ -n $host_mirror_path ]] && umount "${working_dir}/${host_mirror_path}"
+
+ if (( ! have_nspawn )); then
+ for host_config in resolv.conf localtime; do
+ umount "${working_dir}/etc/${host_config}"
+ done
+ umount "${working_dir}/proc/sys"
+ umount "${working_dir}/proc"
+ umount "${working_dir}/sys"
+ umount "${working_dir}/dev/pts"
+ umount "${working_dir}/dev/shm"
+ umount "${working_dir}/dev"
+ umount "${working_dir}/run"
+ fi
+
+ trap 'trap_abort' INT QUIT TERM HUP
+ trap 'trap_exit' EXIT
+}
+
+chroot_lock () {
+ lock_open_write 9 "${working_dir}" "Locking chroot"
+}
+
+chroot_run() {
+ local dir=$1
+ shift
+ if (( have_nspawn)); then
+ local nspawn_args=(-D "$dir")
+ if [[ $NONETWORK = y ]]; then
+ nspawn_args+=(--private-network)
+ fi
+ eval systemd-nspawn "${nspawn_args[@]}" -- "${@}" 2>/dev/null
+ else
+ local unshare_args=(-mui)
+ if [[ $NONETWORK = y ]]; then
+ unshare_args+=(-n)
+ fi
+ eval unshare "${unshare_args[@]}" -- chroot "${dir}" "${@}"
+ fi
+}
+
+# }}}
+
+# use systemd-nspawn if we have it available and systemd is running
+if type -P systemd-nspawn >/dev/null && mountpoint -q /sys/fs/cgroup/systemd; then
+ have_nspawn=1
+fi
+
+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 ${CHROOT_VERSION}. Please rebuild."
+ fi
+
+ chroot_lock
+ chroot_mount
+ copy_hostconf
+
+ chroot_run "${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 { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then
+ chmod 0755 "${working_dir}"
+ fi
+
+ chroot_lock
+ chroot_mount
+
+ pacargs="${cache_dirs[@]/#/--cachedir=}"
+ if [[ -n $pac_conf ]]; then
+ pacargs="$pacargs --config=${pac_conf}"
+ fi
+
+ if (( $# != 0 )); then
+ if [[ $FORCE = 'y' ]]; then
+ pacargs="$pacargs --force"
+ fi
+ if ! pacstrap -GMcd "${working_dir}" ${pacargs} "${PKGS[@]}"; then
+ die 'Failed to install all packages'
+ fi
+ fi
+
+ if [[ -d "${working_dir}/lib/modules" ]]; then
+ chroot_run "${working_dir}" ldconfig
+ fi
+
+ if [[ -e "${working_dir}/etc/locale.gen" ]]; then
+ sed -i 's@^#\(en_US\|de_DE\)\(\.UTF-8\)@\1\2@' "${working_dir}/etc/locale.gen"
+ chroot_run "${working_dir}" locale-gen
+ fi
+ echo 'LANG=C' > "${working_dir}/etc/locale.conf"
+
+ copy_hostconf
+
+ echo "${CHROOT_VERSION}" > "${working_dir}/.arch-chroot"
+ # }}}
+fi