#!/bin/sh
set -e

# Run background synchronization once PostgreSQL is up on local unix socket
sync_credentials() {
  until pg_isready -q -h /var/run/postgresql; do
    sleep 0.5
  done

  USER="${POSTGRES_USER:-postgres}"
  PASS="${POSTGRES_PASSWORD:-postgres}"

  psql -v ON_ERROR_STOP=0 -h /var/run/postgresql -U postgres -d postgres <<-EOSQL >/dev/null 2>&1
    DO \$\$
    BEGIN
      IF NOT EXISTS (SELECT FROM pg_catalog.pg_roles WHERE rolname = '$USER') THEN
        CREATE ROLE "$USER" WITH LOGIN SUPERUSER PASSWORD '$PASS';
      ELSE
        ALTER ROLE "$USER" WITH LOGIN SUPERUSER PASSWORD '$PASS';
      END IF;
    END
    \$\$;
EOSQL
}

sync_credentials &

exec docker-entrypoint.sh "$@"