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|
#! /bin/sh
set -efu
nix_url=https://nixos.org/releases/nix/nix-1.11.13/nix-1.11.13-x86_64-linux.tar.bz2
nix_sha256=c11411d52d8ad1ce3a68410015487282fd4651d3abefbbb13fa1f7803a2f60de
prepare() {(
if test -e /etc/os-release; then
. /etc/os-release
case $ID in
arch)
prepare_arch "$@"
exit
;;
centos)
case $VERSION_ID in
7)
prepare_centos "$@"
exit
;;
esac
;;
debian)
if grep -Fq Hetzner /etc/motd; then
prepare_hetzner_rescue "$@"
exit
fi
case $VERSION_ID in
7)
prepare_debian "$@"
exit
;;
8)
prepare_debian "$@"
exit
;;
esac
;;
nixos)
case $(cat /proc/cmdline) in
*' root=LABEL=NIXOS_ISO '*)
prepare_nixos_iso "$@"
exit
esac
;;
stockholm)
case $(cat /proc/cmdline) in
*' root=LABEL=NIXOS_ISO '*)
prepare_nixos_iso "$@"
exit
esac
;;
esac
fi
echo "$0 prepare: unknown OS" >&2
exit -1
)}
prepare_arch() {
pacman -Sy
type bzip2 2>/dev/null || pacman -S --noconfirm bzip2
type git 2>/dev/null || pacman -S --noconfirm git
type rsync 2>/dev/null || pacman -S --noconfirm rsync
prepare_common
}
prepare_centos() {
type bzip2 2>/dev/null || yum install -y bzip2
type git 2>/dev/null || yum install -y git
type rsync 2>/dev/null || yum install -y rsync
prepare_common
}
prepare_debian() {
apt-get update
type bzip2 2>/dev/null || apt-get install bzip2
type git 2>/dev/null || apt-get install git
type rsync 2>/dev/null || apt-get install rsync
type curl 2>/dev/null || apt-get install curl
prepare_common
}
prepare_nixos_iso() {
_which() (
type -p "$1"
)
mountpoint /mnt
type git 2>/dev/null || nix-env -iA nixos.git
mkdir -p /mnt/"$target_path"
mkdir -p "$target_path"
if ! mountpoint "$target_path"; then
mount --rbind /mnt/"$target_path" "$target_path"
fi
mkdir -p bin
rm -f bin/nixos-install
cp "$(_which nixos-install)" bin/nixos-install
sed -i "s@NIX_PATH=\"[^\"]*\"@NIX_PATH=$target_path@" bin/nixos-install
}
prepare_hetzner_rescue() {
_which() (
which "$1"
)
mountpoint /mnt
type bzip2 2>/dev/null || apt-get install bzip2
type git 2>/dev/null || apt-get install git
type rsync 2>/dev/null || apt-get install rsync
type curl 2>/dev/null || apt-get install curl
mkdir -p /mnt/"$target_path"
mkdir -p "$target_path"
if ! mountpoint "$target_path"; then
mount --rbind /mnt/"$target_path" "$target_path"
fi
_prepare_nix_users
_prepare_nix
_prepare_nixos_install
}
get_nixos_install() {
echo "installing nixos-install" 2>&1
c=$(mktemp)
cat <<EOF > $c
{ fileSystems."/" = {};
boot.loader.grub.enable = false;
}
EOF
export NIXOS_CONFIG=$c
nix-env -i -A config.system.build.nixos-install -f "<nixpkgs/nixos>"
rm -v $c
}
prepare_common() {(
_which() (
type -p "$1"
)
_prepare_nix_users
#
# mount install directory
#
if ! mount | grep -Fq ' on /mnt type '; then
mkdir -p /newshit
mount --bind /newshit /mnt
fi
if ! mount | grep -Fq ' on /mnt/boot type '; then
mkdir -p /mnt/boot
if mount | grep -Fq ' on /boot type '; then
bootpart=$(mount | grep ' on /boot type ' | sed 's/ .*//')
mount $bootpart /mnt/boot
else
mount --bind /boot /mnt/boot
fi
fi
#
# prepare install directory
#
rootpart=$(mount | grep ' on / type ' | sed 's/ .*//')
mkdir -p /mnt/etc/nixos
mkdir -m 0555 -p /mnt/var/empty
mkdir -p /mnt/var/src
touch /mnt/var/src/.populate
if ! mount | grep -Fq "$rootpart on /mnt/root type "; then
mkdir -p /mnt/root
mount --bind /root /mnt/root
fi
#
# prepare nix store path
#
mkdir -v -m 0755 -p /nix
if ! mount | grep -Fq "$rootpart on /mnt/nix type "; then
mkdir -p /mnt/nix
mount --bind /nix /mnt/nix
fi
_prepare_nix
_prepare_nixos_install
)}
_prepare_nix() {
# install nix on host (cf. https://nixos.org/nix/install)
if ! test -e /root/.nix-profile/etc/profile.d/nix.sh; then
(
verify() {
printf '%s %s\n' $nix_sha256 $(basename $nix_url) | sha256sum -c
}
if ! verify; then
curl -C - -O "$nix_url"
verify
fi
)
nix_src_dir=$(basename $nix_url .tar.bz2)
tar jxf $nix_src_dir.tar.bz2
$nix_src_dir/install
fi
. /root/.nix-profile/etc/profile.d/nix.sh
mkdir -p /mnt/"$target_path"
mkdir -p "$target_path"
if ! mountpoint "$target_path"; then
mount --rbind /mnt/"$target_path" "$target_path"
fi
}
_prepare_nix_users() {
if ! getent group nixbld >/dev/null; then
groupadd -g 30000 -r nixbld
fi
for i in `seq 1 10`; do
if ! getent passwd nixbld$i 2>/dev/null; then
useradd \
-d /var/empty \
-g 30000 \
-G 30000 \
-l \
-M \
-s /sbin/nologin \
-u $(expr 30000 + $i) \
nixbld$i
fi
done
}
_prepare_nixos_install() {
get_nixos_install
mkdir -p bin
rm -f bin/nixos-install
cp "$(_which nixos-install)" bin/nixos-install
sed -i "s@NIX_PATH=\"[^\"]*\"@NIX_PATH=$target_path@" bin/nixos-install
if ! grep -q '^PATH.*#krebs' .bashrc; then
echo '. /root/.nix-profile/etc/profile.d/nix.sh' >> .bashrc
echo 'PATH=$HOME/bin:$PATH #krebs' >> .bashrc
fi
}
prepare "$@"
|
