#!/bin/sh
set -euo pipefail

kill_jobs() {
    jobs -p | xargs -rn1 kill || true
}

trap "kill_jobs" EXIT

POSTGRES="postgres -c unix_socket_directories=${PPQ_POSTGRES_DATA_DIR}"

# NOTE: Environment variables here are set up by .envrc

postgres_init () {
    local PGDATA_NEW="${PGDATA}.new"

    rm -rf "${PGDATA_NEW}"
    pg_ctl -s init -D "${PGDATA_NEW}" -o "-E UTF-8 --no-locale -A trust -U postgres"
    echo "${PGDATA_NEW}"

    # Clobber postgresql.conf
    ln -fs "${PPQ_POSTGRES_DIR}/postgresql.conf" "${PGDATA_NEW}/"
    ln -fs "${PPQ_POSTGRES_DIR}/postgresql_overrides.conf" "${PGDATA_NEW}/" || true

    if [ -f "${PPQ_POSTGRES_DIR}/prepare.sql" ]; then
	$POSTGRES --single -D "${PGDATA_NEW}" postgres < "${PPQ_POSTGRES_DIR}/prepare.sql" >/dev/null
    fi

    mv "${PGDATA_NEW}" "${PGDATA}"
    sync
}

postgres_start () {
    [ -d "${PGDATA}" ] || postgres_init
    $POSTGRES
}


COMMAND="${1:-}"
[ -n "$COMMAND" ] && shift

case "$COMMAND" in
    start)
	postgres_start
	;;
    *)
      echo "Available commands:"
      echo "  start - start the PostgreSQL server"
      ;;
esac