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#!/bin/bash -xe
IMAGE_VERSION=$( date +%Y%m%d.%H%M%S )
function unmount_pseudo_filesystems(){
set +e
for dir in dev sys proc; do umount -v "$root"/"$dir"; done
set -e
}
function on_exit(){
set +e
unmount_pseudo_filesystems
umount -v "$root"
}
trap on_exit EXIT
root=rootfs/"$IMAGE_VERSION"
mkdir -p "$root"
# bootstrap the OS
debootstrap noble "$root"
for dir in /proc /sys /dev; do
mount --bind "$dir" "$root"/"$dir"
done
export DEBIAN_FRONTEND=noninteractive
chroot "$root" locale-gen en_US.UTF-8
chroot "$root" apt-get update
# Install a kernel and bootloader
chroot "$root" apt-get -y --no-install-recommends install linux-generic-hwe-24.04 grub-efi
if [ "$1" == "with-app" ]; then
# Install an application
chroot "$root" apt-get update
chroot "$root" apt-get install -y software-properties-common
chroot "$root" add-apt-repository -y universe
chroot "$root" apt-get update
chroot "$root" apt-get -y install nethack-console
fi
# Cleanup
chroot "$root" apt-get clean
unmount_pseudo_filesystems
rm -rf "$root"/dev/*
rm -rf "$root"/var/lib/apt/lists/*
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