AGORA_SOURCE_URL="https://www.agora-project.net/?ctrl=offline&action=download"

extract_source() {
  local DESTDIR=$1
    
  # retrieve and extract Agora tarball
  rc_tarball="${DESTDIR}/agora.zip"
  sudo wget -q -O "$rc_tarball" "$AGORA_SOURCE_URL" \
    || ynh_die "Unable to download source tarball"
  sudo unzip "$rc_tarball" -C "$DESTDIR" \
    || ynh_die "Unable to extract source tarball"
  sudo rm "$rc_tarball"
}