A small script to update the factorio-experimental AUR package automatically without any manual intervention

factorio-update.sh

#!/bin/bash

function msg () {
    local FMT="$1"
    shift
    printf "\x1B[1;35m==> \x1B[;1m${FMT}\x1B[m\n" "$@"
}

function msg2 () {
    local FMT="$1"
    shift
    printf "\x1B[1;36m  -> \x1B[;1m${FMT}\x1B[m\n" "$@"
}

function ask () {
    local OPTIND
    local OPTARG
    local OPTERR
    local NoEcho=

    while getopts ':p' OPT; do
        case $OPT in
            p) NoEcho='-s'
        esac
    done

    shift $(( OPTIND - 1 ))

    local Var="$1"
    shift
    printf "\x1B[1;33m    > \x1B[;1m%s\x1B[m: " "$*"

    read $NoEcho $Var
    if [ -n "$NoEcho" ]; then
        printf '\n'
    fi
}

if [ -z "$1" ]; then
    VER_AUR="$(package-query -A -f "%v" factorio-experimental)"
else
    VER_AUR="$1"
fi
VER_LOCAL="$(package-query -A -f "%l" factorio-experimental)"
VER_FACTORIO="${VER_AUR%%-*}"

TARNAME="factorio_alpha_x64_${VER_FACTORIO}.tar.gz"

mkdir -p ~/.factorio/build
cd ~/.factorio/build

if [ "$VER_AUR" != "$VER_LOCAL" ]; then
    msg "Updating Factorio: [%s] -> [%s]" "$VER_LOCAL" "$VER_AUR"

    msg2 "Downloading PKGBUILD..."
    yaourt -G factorio-experimental --nocolor --noconfirm
    cd factorio-experimental

    sed -i PKGBUILD -e "s/^pkgver=.*$/pkgver=$VER_FACTORIO/"

    Login=
    if [ -f ../cookies ]; then
        msg2 "Found Cookie file, checking access..."

        if curl -L "https://www.factorio.com" -b ../cookies | grep "log out" >/dev/null; then
            Login=yes
        fi
    fi

    if [ -z "$Login" ]; then
        msg2 "Enter your credentials for Factorio:"
        ask USER 'Username'
        ask -p PASS 'Password'

        curl -L "https://www.factorio.com/login" \
            -X POST -d "username-or-email=$USER&password=$PASS" \
            -c ../cookies \
            >/dev/null
    fi

    msg2 "Downloading Factorio $VER_FACTORIO..."
    curl -L "https://www.factorio.com/get-download/direct/$VER_FACTORIO/alpha/linux64" \
        -C - -o "../$TARNAME" \
        -b ../cookies -c ../cookies

    ln -sf "../$TARNAME" .
    makepkg -cfi --noconfirm </dev/null

    cd ..
    rm -rf factorio-experimental
else
    msg "Factorio is up to date: %s" "$VER_AUR"
fi