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Diffstat (limited to 'mkarchroot.in')
| -rw-r--r-- | mkarchroot.in | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/mkarchroot.in b/mkarchroot.in new file mode 100644 index 0000000..8e74c54 --- /dev/null +++ b/mkarchroot.in @@ -0,0 +1,231 @@ +#!/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. + +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. Default: /var/cache/pacman/pkg' + 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 0 ;; + *) echo "invalid argument '${arg}'"; usage 1 ;; + esac +done + +if [ "$EUID" != '0' ]; then + echo 'error: this script must be run as root.' + exit 1 +fi + +shift $(($OPTIND - 1)) + +if [ "$RUN" = '' -a $# -lt 2 ]; then + echo 'you must specify a directory and one or more packages' + usage 1 +elif [ $# -lt 1 ]; then + echo 'you must specify a directory' + usage 1 +fi + +working_dir="$(readlink -f ${1})" +shift 1 + +[ "${working_dir}" = '' ] && echo 'error: please specify a working directory' && usage 1 + +if [ -z "$cache_dir" ]; then + cache_conf=${working_dir}/etc/pacman.conf + [ ! -f $cache_conf ] && cache_conf=${pac_conf:-/etc/pacman.conf} + cache_dir=$( (grep -m 1 '^CacheDir' $cache_conf || echo 'CacheDir = /var/cache/pacman/pkg') | sed 's/CacheDir\s*=\s*//') + unset cache_conf +fi + +if [ -f /etc/pacman.d/mirrorlist ]; then + host_mirror=$(pacman -Sddp extra/devtools 2>/dev/null | sed -E 's#(.*/)extra/os/.*#\1$repo/os/$arch#') +fi +if [ -z "${host_mirror}" ]; then + host_mirror='http://mirrors.kernel.org/archlinux/$repo/os/$arch' +fi +if echo "${host_mirror}" | grep -q 'file://'; then + host_mirror_path=$(echo "${host_mirror}" | sed -E 's#file://(/.*)/\$repo/os/\$arch#\1#g') +fi + +# {{{ functions +chroot_mount() { + [ -e "${working_dir}/sys" ] || mkdir "${working_dir}/sys" + mount -t sysfs sysfs "${working_dir}/sys" + + [ -e "${working_dir}/proc" ] || mkdir "${working_dir}/proc" + mount -t proc proc "${working_dir}/proc" + + [ -e "${working_dir}/dev" ] || mkdir "${working_dir}/dev" + mount -t tmpfs dev "${working_dir}/dev" -o mode=0755,size=10M,nosuid + mknod -m 666 "${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/tty0" c 4 0 + mknod -m 666 "${working_dir}/dev/full" c 1 7 + ln -s /proc/kcore "${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 "${working_dir}/dev/shm" -o nodev,nosuid,size=128M + + [ -e "${working_dir}/dev/pts" ] || mkdir "${working_dir}/dev/pts" + mount -t devpts devpts "${working_dir}/dev/pts" -o newinstance,ptmxmode=666 + ln -s pts/ptmx "${working_dir}/dev/ptmx" + + [ -e "${cache_dir}" ] || mkdir -p "${cache_dir}" + [ -e "${working_dir}/${cache_dir}" ] || mkdir -p "${working_dir}/${cache_dir}" + mount -o bind "${cache_dir}" "${working_dir}/${cache_dir}" + + if [ -n "${host_mirror_path}" ]; then + [ -e "${working_dir}/${host_mirror_path}" ] || mkdir -p "${working_dir}/${host_mirror_path}" + mount -o bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}" + mount -o remount,ro,bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}" + fi + + trap 'chroot_umount' EXIT INT QUIT TERM HUP +} + +copy_hostconf () { + chroot "${working_dir}" /bin/findmnt -rnu -o SOURCE,TARGET,FSTYPE,OPTIONS > "${working_dir}/etc/mtab" + cp /etc/resolv.conf "${working_dir}/etc/resolv.conf" + echo "Server = ${host_mirror}" > ${working_dir}/etc/pacman.d/mirrorlist +} + +chroot_umount () { + umount "${working_dir}/proc" + umount "${working_dir}/sys" + umount "${working_dir}/dev/pts" + umount "${working_dir}/dev/shm" + umount "${working_dir}/dev" + umount "${working_dir}/${cache_dir}" + [ -n "${host_mirror_path}" ] && umount "${working_dir}/${host_mirror_path}" +} + +chroot_lock () { + # Only reopen the FD if it wasn't handed to us + if [ "$(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 + echo -n "locking chroot..." + flock 9 + echo "done" + fi +} +# }}} + +umask 0022 +if [ "$RUN" != "" ]; then + # run chroot {{{ + #Sanity check + if [ ! -f "${working_dir}/.arch-chroot" ]; then + echo "error: '${working_dir}' does not appear to be a Arch chroot" + echo ' please build the image using mkarchroot' + exit 1 + fi + + chroot_lock + chroot_mount + copy_hostconf + + eval chroot "${working_dir}" ${RUN} + + # }}} +else + # {{{ build chroot + if [ -e "${working_dir}" -a "${FORCE}" = "n" ]; then + echo "error: working dir '${working_dir}' already exists - try using -f" + exit 1 + fi + + if { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then + chmod 0755 "${working_dir}" + fi + + mkdir -p "${working_dir}/var/lib/pacman/sync" + mkdir -p "${working_dir}/etc/" + + chroot_lock + chroot_mount + + pacargs="--noconfirm --root=${working_dir} --cachedir=${cache_dir}" + if [ "$pac_conf" != "" ]; then + pacargs="$pacargs --config=${pac_conf}" + fi + + if [ $# -ne 0 ]; then + op='-Sy' + if [ "$FORCE" = "y" ]; then + op="${op}f" + fi + if ! pacman ${op} ${pacargs} $@; then + echo 'error: failed to install all packages' + exit 1 + fi + fi + + if [ -d "${working_dir}/lib/modules" ]; then + ldconfig -r "${working_dir}" + fi + + if [ "$pac_conf" != "" -a "$NOCOPY" = "n" ]; then + cp ${pac_conf} ${working_dir}/etc/pacman.conf + fi + + if [ "$makepkg_conf" != "" -a "$NOCOPY" = "n" ]; then + cp ${makepkg_conf} ${working_dir}/etc/makepkg.conf + fi + + if [ -e "${working_dir}/etc/locale.gen" ]; then + sed -i 's@^#\(en_US\|de_DE\)\(\.UTF-8\)@\1\2@' "${working_dir}/etc/locale.gen" + chroot "${working_dir}" locale-gen + fi + + if [ ! -e "${working_dir}/.arch-chroot" ]; then + date +%s > "${working_dir}/.arch-chroot" + fi + # }}} +fi |