Feedati/docker/wait-db

#!/bin/bash
### psql configuration parameters must be received as environ vars
### (PGHOST, PGDATABASE, PGUSER, PGPASSWORD)
timeout=60
for _ in $(seq 1 "$timeout"); do
    if psql -w -c "" -q 2> /dev/null; then
        echo "DB ready"
        exec "$@"
    fi
    echo "Waiting..." >&2
    sleep 1
done
echo "Timeout! postgresql wasn't ready in 60 seconds" >&2
exit 1