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#!/usr/bin/env bash
# Generate a minimal filesystem for archlinux and load it into the local
# docker as "archlinux"
# requires root
set -e
hash pacstrap &>/dev/null || {
echo "Could not find pacstrap. Run pacman -S arch-install-scripts"
exit 1
}
hash expect &>/dev/null || {
echo "Could not find expect. Run pacman -S expect"
exit 1
}
export LANG="C.UTF-8"
ROOTFS=$(mktemp -d ${TMPDIR:-/var/tmp}/rootfs-archlinux-XXXXXXXXXX)
chmod 755 $ROOTFS
# packages to ignore for space savings
PKGIGNORE=(
cryptsetup
device-mapper
dhcpcd
iproute2
jfsutils
linux
lvm2
man-db
man-pages
mdadm
nano
netctl
openresolv
pciutils
pcmciautils
reiserfsprogs
s-nail
systemd-sysvcompat
usbutils
vi
xfsprogs
)
IFS=','
PKGIGNORE="${PKGIGNORE[*]}"
unset IFS
arch="$(uname -m)"
case "$arch" in
armv*)
if pacman -Q archlinuxarm-keyring >/dev/null 2>&1; then
pacman-key --init
pacman-key --populate archlinuxarm
else
echo "Could not find archlinuxarm-keyring. Please, install it and run pacman-key --populate archlinuxarm"
exit 1
fi
PACMAN_CONF=$(mktemp ${TMPDIR:-/var/tmp}/pacman-conf-archlinux-XXXXXXXXX)
version="$(echo $arch | cut -c 5)"
sed "s/Architecture = armv/Architecture = armv${version}h/g" './mkimage-archarm-pacman.conf' > "${PACMAN_CONF}"
PACMAN_MIRRORLIST='Server = http://mirror.archlinuxarm.org/$arch/$repo'
PACMAN_EXTRA_PKGS='archlinuxarm-keyring'
EXPECT_TIMEOUT=1800 # Most armv* based devices can be very slow (e.g. RPiv1)
ARCH_KEYRING=archlinuxarm
DOCKER_IMAGE_NAME="armv${version}h/archlinux"
;;
*)
PACMAN_CONF='./mkimage-arch-pacman.conf'
PACMAN_MIRRORLIST='Server = https://jpn.mirror.archlinux32.org/$arch/$repo'
PACMAN_EXTRA_PKGS=''
EXPECT_TIMEOUT=60
ARCH_KEYRING=archlinux
DOCKER_IMAGE_NAME=archlinux
;;
esac
export PACMAN_MIRRORLIST
expect <<EOF
set send_slow {1 .1}
proc send {ignore arg} {
sleep .1
exp_send -s -- \$arg
}
set timeout $EXPECT_TIMEOUT
spawn pacstrap -C $PACMAN_CONF -c -d -G -i $ROOTFS base haveged $PACMAN_EXTRA_PKGS --ignore $PKGIGNORE
expect {
-exact "anyway? \[Y/n\] " { send -- "n\r"; exp_continue }
-exact "(default=all): " { send -- "\r"; exp_continue }
-exact "installation? \[Y/n\]" { send -- "y\r"; exp_continue }
-exact "delete it? \[Y/n\]" { send -- "y\r"; exp_continue }
}
EOF
arch-chroot $ROOTFS /bin/sh -c 'rm -r /usr/share/man/*'
arch-chroot $ROOTFS /bin/sh -c "haveged -w 1024; pacman-key --init; pkill haveged; pacman -Rs --noconfirm haveged; pacman-key --populate $ARCH_KEYRING; pkill gpg-agent"
arch-chroot $ROOTFS /bin/sh -c "ln -s /usr/share/zoneinfo/UTC /etc/localtime"
echo 'en_US.UTF-8 UTF-8' > $ROOTFS/etc/locale.gen
arch-chroot $ROOTFS locale-gen
arch-chroot $ROOTFS /bin/sh -c 'echo $PACMAN_MIRRORLIST > /etc/pacman.d/mirrorlist'
# udev doesn't work in containers, rebuild /dev
DEV=$ROOTFS/dev
rm -rf $DEV
mkdir -p $DEV
mknod -m 666 $DEV/null c 1 3
mknod -m 666 $DEV/zero c 1 5
mknod -m 666 $DEV/random c 1 8
mknod -m 666 $DEV/urandom c 1 9
mkdir -m 755 $DEV/pts
mkdir -m 1777 $DEV/shm
mknod -m 666 $DEV/tty c 5 0
mknod -m 600 $DEV/console c 5 1
mknod -m 666 $DEV/tty0 c 4 0
mknod -m 666 $DEV/full c 1 7
mknod -m 600 $DEV/initctl p
mknod -m 666 $DEV/ptmx c 5 2
ln -sf /proc/self/fd $DEV/fd
tar --numeric-owner --xattrs --acls -C $ROOTFS -c . | docker import - $DOCKER_IMAGE_NAME
docker run --rm -t $DOCKER_IMAGE_NAME echo Success.
rm -rf $ROOTFS
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