stockholm/krebs/4lib/infest/prepare.sh

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#! /bin/sh
set -efu
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
;;
esac
fi
echo "$0 prepare: unknown OS" >&2
exit -1
)}
prepare_arch() {
type bzip2 2>/dev/null || pacman -S --noconfirm bzip2
type git 2>/dev/null || pacman -S --noconfirm git
type rsync 2>/dev/null || pacman -S --noconfirm rsync
prepare_common
}
prepare_centos() {
type bzip2 2>/dev/null || yum install -y bzip2
type git 2>/dev/null || yum install -y git
type rsync 2>/dev/null || yum install -y rsync
prepare_common
}
prepare_common() {
if ! getent group nixbld >/dev/null; then
groupadd -g 30000 -r nixbld
fi
for i in `seq 1 10`; do
if ! getent passwd nixbld$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
#
# 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
bootdev=$(mount | grep " on /boot type " | sed 's/ .*//')
mount $bootdev /mnt/boot
else
mount --bind /boot/ /mnt/boot
fi
fi
#
# prepare install directory
#
rootpart=$(mount | grep " on / type" | sed 's/ .*//')
mkdir -p /mnt/etc/nixos
mkdir -m 0555 -p /mnt/var/empty
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 "$@"