sudo sh -ex - <<'EOF'
rm -f /etc/apt/sources.list.d/itvgroup.list
apt-get update || true
apt-get install --no-install-recommends -y wget ca-certificates apt-transport-https
export GPG_KEY_PATH="/usr/share/keyrings/itvgroup.gpg.key"
mkdir --parents "$(dirname "${GPG_KEY_PATH}")"
wget -O "${GPG_KEY_PATH}" https://download.itv.ru/mirrors/apt/intellectx-deb/public-keys.asc
tee /etc/apt/sources.list.d/itvgroup.list <<EOFSRCLIST
deb [signed-by=${GPG_KEY_PATH}] https://download.itv.ru/mirrors/apt/intellectx-deb stretch backports/main
deb [signed-by=${GPG_KEY_PATH}] https://download.itv.ru/mirrors/apt/intellectx-deb buster backports/main
deb [signed-by=${GPG_KEY_PATH}] https://download.itv.ru/mirrors/apt/intellectx-deb stable main
EOFSRCLIST
apt-get update
EOF |