#!/bin/bash
set -e
set -o pipefail

CURRENT_PGVERSION="$(cat $PGDATA/PG_VERSION)"
NEW_PGVERSION="13"

if [ "$CURRENT_PGVERSION" == "$NEW_PGVERSION" ]; then
	echo "Current and new postgres version are identical. Aborting."
	exit 1
fi

export PGBINOLD="/usr/lib/postgresql/$CURRENT_PGVERSION/bin"
export PGBINNEW="/usr/lib/postgresql/$NEW_PGVERSION/bin"
export PGDATAOLD="$PGDATA"
if [ "$OPENPROJECT_INSTALLATION__TYPE" == "docker" ]; then
	export PGDATANEW="$PGDATA-next"
else
	export PGDATANEW="/var/lib/postgresql/$NEW_PGVERSION/main"
fi

if [ ! -d "$PGDATANEW" ]; then
	echo "$PGDATANEW does not exist."
	exit 1
fi

if [ ! -f "$PGDATANEW/PG_VERSION" ]; then
	echo "Empty cluster found in $PGDATANEW. Generating cluster..."
	PGBIN=$PGBINNEW PGDATA=$PGDATANEW ./docker/prod/postgres-db-init
fi

cd /var/lib/postgresql
su -m postgres -c "$PGBINNEW/pg_upgrade"