#!/bin/bash
set -xeuo pipefail
IFS=$'\n\t'

POSTGRES_VERSION=${1:-12}
DEBIAN_VERSION=${2:-buster}
export DEBIAN_FRONTEND=noninteractive

# Uninstall the system client so that we don't have multiple versions
apt purge -y postgresql-client postgresql-client-common

curl -sS -L https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
echo "deb http://apt.postgresql.org/pub/repos/apt/ ${DEBIAN_VERSION}-pgdg main" | tee /etc/apt/sources.list.d/postgresql.list

apt-get update
apt-get install -y postgresql-client-${POSTGRES_VERSION}

apt-get autoremove -yq
apt-get clean -yqq
rm -rf /var/lib/apt/lists/*