#!/bin/sh

timeout=120
start="$(date +%s)"
while true; do
    if err=$(echo "SELECT 1;" | psql 2>&1 >/dev/null); then
        break
    fi
    now=$(date +%s)
    if ! [ "$err" = "psql: FATAL:  the database system is starting up" ]; then
        echo "postgres connection error:" \
             "Could not connect to '$PGHOST'. (will retry)"
        if [ "$err" ]; then
            echo "  Error:" >&2
            printf "%s\n" "$err" | sed -r "s/^/    ! /g" >&2
        fi
    else
        echo "Got 'database system is starting up' error... waiting before launching npm start" >&2
    fi
    elapsed=$((now - start))
    if [ "$elapsed" -gt "$timeout" ]; then
        echo "postgre connection error:"\
        "Could not connect to db on '$PGHOST'" \
        "container's IP."
        exit 1
    fi
    sleep 0.5
done

exec npm start