#!/bin/bash
set -e

usage() {
cat &2
                exit
            fi
            BUILD_ARGS="--build-arg BASE_TAG=$2"
            shift # skip the flag value
            ;;
        -?*)
            usage
            printf 'ERROR: Unknown option: %s\n' "$1" >&2
            exit
            ;;
        *)            
            break
    esac

    shift
done

readonly CACHE_FLAG
readonly DOCKERFILE
readonly IMAGE_TAG
readonly BUILD_ARGS

set -x
docker build --rm --pull $CACHE_FLAG -t "$IMAGE_TAG" -f "$DOCKERFILE" $BUILD_ARGS .