#!/bin/bash

work_dir=$1
arch=$2

# A func to download, build ...
build_aur () {
    old_dir=`pwd`
    # Prep with a build-user:
    useradd -m -G wheel builder
    sed -i 's/# %wheel ALL=(ALL) NO/%wheel ALL=(ALL) NO/' /etc/sudoers

    cd /tmp
    rm -rf $1 $1.tar.gz
    wget "https://aur.archlinux.org/cgit/aur.git/snapshot/$1.tar.gz"
    tar xvzf "$1.tar.gz"

    cd $1
    build_dir=$(pwd)
    chown -R builder.builder /tmp/$1
    echo " => Buiilding $1"
    su - builder -c "(cd ${build_dir}; makepkg -s --noconfirm)" >/dev/null 2>&1

    if [[ -n $3 ]]; then
        echo " => Adding $1 to local AUR mirror"
        mkdir -p $3
        sh -c "cp *.xz $3/$1.pkg.tar.xz"
        sh -c "repo-add $3/aur_offline.db.tar.gz $3/*.xz"
        if [[ -z $(cat ${old_dir}/packages.both | grep $1) ]]; then
            echo " => Adding $1 to packages.both (from AUR)"
            echo "$1" >> ${old_dir}/packages.both
        fi
    fi

    sh -c "mv *.xz ${old_dir}/$2/$1.pkg.tar.xz"

    cd ${old_dir}
    userdel builder
    rm -rf /home/builder
    rm -rf /tmp/$1
    rm /tmp/$1.tar.gz
}

echo "Starting to sync upstream changes to mirror."

mkdir -p ${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/x86_64
rm -rf /tmp/sync /tmp/local

echo " => Retrieving packages"
pacman --noconfirm --dbpath /tmp/ -Syu -w --cachedir ${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/${arch} base base-devel syslinux efitools haveged intel-ucode memtest86+ mkinitcpio-nfs-utils nbd zsh git python python-systemd nano sudo iptables dhclient dnsmasq openssh sshfs openssl openvpn gcc openvpn powerdns postgresql sqlite go c-ares http-parser libuv nodejs-less mariadb memcached bzip2 glib2 libev lua51 ragel zlib >/dev/null 2>&1

echo " => Retrieving ISO specific packages"
pacman --noconfirm --dbpath /tmp/ -Syu -w --cachedir ${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/${arch} $(cat ${work_dir}/../packages.both)

echo " => Building AUR (Adding packages to packages.both as we go along)"
build_aur "gogs-git" "${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/${arch}"
build_aur "lighttpd2-git" "${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/${arch}" "/tmp/aur_offline"

if [[ -z $(cat ${work_dir}/pacman.conf | grep '\[aur_offline\]') ]]; then
    echo "Adding offline mirror to build bubble"
    echo "[aur_offline]" >> ${work_dir}/pacman.conf
    echo "Server = file:///tmp/aur_offline" >> ${work_dir}/pacman.conf
    echo "SigLevel = Optional TrustAll" >> ${work_dir}/pacman.conf
fi

echo " => Adding packages to offline database"
sh -c "repo-add --new ${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/${arch}/arch_offline.db.tar.gz ${work_dir}/${arch}/airootfs/srv/http/archlinux/arch_offline/os/${arch}/*.pkg.tar.xz" >/dev/null 2>&1

pacman --config ${work_dir}/pacman.conf -Sy
pacman -Sy
echo "Done syncing offline mirror."