#!/usr/bin/env bash

#Bootstrap the system
rm -rf $2
mkdir $2
if [ "$1" = "i386" ] || [ "$1" = "amd64" ] ; then
  debootstrap --no-check-gpg --arch=$1 --variant=minbase --include=systemd,libsystemd0,libnss-systemd,systemd-sysv,wget,ca-certificates focal $1 http://mirrors.ustc.edu.cn/ubuntu
else  
  qemu-debootstrap --no-check-gpg --arch=$1 --variant=minbase --include=systemd,libsystemd0,libnss-systemd,systemd-sysv,wget,ca-certificates focal $1 http://mirrors.ustc.edu.cn/ubuntu-ports
fi

#Reduce size


#Fix permission on dev machine only for easy packing
chmod 777 -R $2

#This step is only needed for Ubuntu to prevent Group error
touch $2/root/.hushlogin

#Setup DNS
echo "127.0.0.1 localhost" > $2/etc/hosts
echo "nameserver 8.8.8.8" > $2/etc/resolv.conf
echo "nameserver 8.8.4.4" >> $2/etc/resolv.conf

#sources.list setup
rm $2/etc/apt/sources.list
rm $2/etc/hostname
echo "AnLinux-Ubuntu" > /etc/hostname
if [ "$1" = "i386" ] || [ "$1" = "amd64" ] ; then
  echo "deb http://mirrors.ustc.edu.cn/ubuntu focal main restricted universe multiverse" >> $2/etc/apt/sources.list
  echo "deb-src http://mirrors.ustc.edu.cn/ubuntu focal main restricted universe multiverse" >> $2/etc/apt/sources.list
else  
  echo "deb http://mirrors.ustc.edu.cn/ubuntu-ports focal main restricted universe multiverse" >> $2/etc/apt/sources.list
  echo "deb-src http://mirrors.ustc.edu.cn/ubuntu-ports focal main restricted universe multiverse" >> $2/etc/apt/sources.list
fi

#tar the rootfs
cd $2
rm -rf ../ubuntu-rootfs-$1.tar.xz
rm -rf dev/*
XZ_OPT=-9 tar -cJvf ../ubuntu-rootfs-$1.tar.xz ./*