#!/bin/bash

arch=`uname -m`
if [[ $arch != 'aarch64' ]];then
	echo "Error: rootfs only build on aarch64" 
	exit 1
fi

do_cut=0
repo_path='/etc/yum.repos.d/localmount.repo'
install_dir='/oeoe'
mount_dir='/tmp/for_mount'
tar_name="openeuler-1.0-2020-01_${do_cut}.tar"


recover_env(){
umount $mount_dir
rm -rf $mount_dir
#rm -rf $install_dir
rm -rf $repo_path
mv /opt/*.repo /etc/yum.repos.d/
}

trap "recover_env" 2

#check yum env 
rpm -qa |grep yum &>/dev/null
if [[ $? != 0 ]];then
	echo "Error: no yum env"	
	exit 2
fi

local_arch=`uname -m`
if [[ $local_arch == 'x86_64' ]];then
	echo "Hint: x86_64 build is not supported now"
	exit
fi


# wget iso 
url='http://openeuler-os-image.obs.cn-north-4.myhuaweicloud.com/openEuler-1.0-1205-aarch64-dvd.iso'
wget -N $url 

# mount iso 
mkdir -p $mount_dir 
mount ${url##*/} $mount_dir

# create repo 
mv /etc/yum.repos.d/*.repo /opt
cat > $repo_path << EOF
[local]
name=local
baseurl=file://$mount_dir
enabled=1
gpgcheck=0
EOF

# dnf installroot 
mkdir   $install_dir  || rm -rf $install_dir/*
yum install --installroot=$install_dir --setopt=install_weak_deps=False -y dnf vi 

# tar create rootfs.tar 
pushd $install_dir
if [[ $do_cut == 1 ]];then
chroot . << eof 
/usr/bin/rpm -ql glibc-devel perl-Encode-devel perl-devel kernel-devel libxcrypt-devel \
            systemtap-sdt-devel gcc autoconf m4 autogen automake \
            cpp color-filesystem emacs-filesystem which crontabs \
            fontpackages-filesystem abattis-cantarell-fonts \
            fontconfig hicolor-icon-theme adwaita-icon-theme | xargs -I {} rm -rf {} 
eof
fi

chroot . << eof 
rm -rf /usr/share/{man,doc,locale,icons}/* 
cat > /root/.bashrc << EOF
# Source global definitions
if [ -f /etc/bashrc ]; then
	. /etc/bashrc
fi
EOF
eof
tar --exclude=${tar_name} -cf ${tar_name} .
xz ${tar_name}
popd
echo "Hint: your rootfs lives $install_dir/${tar_name}.xz "
echo "Hint: please expose it to the web server, then you can do docker build"
recover_env