ordar/dockerfile-from-image repository overview

$ docker pull ordar/dockerfile-from-image
$ alias dfimage="docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ordar/dockerfile-from-image"
$ dfimage --help
Usage: dockerfile-from-image.rb [options] <image_id>
    -f, --full-tree                  Generate Dockerfile for all parent layers
    -h, --help                       Show this message
$ dfimage ruby