Install yay on Arch Linux

install-yay.sh

if ! command -v yay >/dev/null; then
    tmp=$(mktemp -d)
    function finish { rm -rf "$tmp"; }  # clean up after yourself...
    trap finish EXIT                    # ...no matter how you exist

    git clone https://aur.archlinux.org/yay.git "$tmp"
    pushd "$tmp"
    makepkg -sri --noconfirm --needed
    popd

    if ! command -v yay >/dev/null; then
        >&2 echo "yay failed to install"
        exit 1
    fi
fi