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moby--moby/contrib/mkimage-arch.sh

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#!/bin/bash
# Generate a minimal filesystem for archlinux and load it into the local
# docker as "archlinux"
# requires root
set -e
PACSTRAP=$(which pacstrap)
[ "$PACSTRAP" ] || {
echo "Could not find pacstrap. Run pacman -S arch-install-scripts"
exit 1
}
EXPECT=$(which expect)
[ "$EXPECT" ] || {
echo "Could not find expect. Run pacman -S expect"
exit 1
}
ROOTFS=~/rootfs-arch-$$-$RANDOM
mkdir $ROOTFS
#packages to ignore for space savings
PKGIGNORE=linux,jfsutils,lvm2,cryptsetup,groff,man-db,man-pages,mdadm,pciutils,pcmciautils,reiserfsprogs,s-nail,xfsprogs
expect <<EOF
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set timeout 60
set send_slow {1 1}
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spawn pacstrap -c -d -G -i $ROOTFS base haveged --ignore $PKGIGNORE
expect {
"Install anyway?" { send n\r; exp_continue }
"(default=all)" { send \r; exp_continue }
"Proceed with installation?" { send "\r"; exp_continue }
"skip the above package" {send "y\r"; exp_continue }
"checking" { exp_continue }
"loading" { exp_continue }
"installing" { exp_continue }
}
EOF
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arch-chroot $ROOTFS /bin/sh -c "haveged -w 1024; pacman-key --init; pkill haveged; pacman -Rs --noconfirm haveged; pacman-key --populate archlinux"
arch-chroot $ROOTFS /bin/sh -c "ln -s /usr/share/zoneinfo/UTC /etc/localtime"
cat > $ROOTFS/etc/locale.gen <<DELIM
en_US.UTF-8 UTF-8
en_US ISO-8859-1
DELIM
arch-chroot $ROOTFS locale-gen
arch-chroot $ROOTFS /bin/sh -c 'echo "Server = http://mirrors.kernel.org/archlinux/\$repo/os/\$arch" > /etc/pacman.d/mirrorlist'
# udev doesn't work in containers, rebuild /dev
DEV=${ROOTFS}/dev
mv ${DEV} ${DEV}.old
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
tar --numeric-owner -C $ROOTFS -c . | docker import - archlinux
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docker run -i -t archlinux echo Success.
rm -rf $ROOTFS