If you have ever suffered from the limitation that you cannot parameterize the value of FROM keyword in Dockerfile then this project may turned out somehow interesting for you! Although, for the time being, its functionality is a little bit... limited - it has already power to do miracles!
The main rule is that each next docker_context passed to the docker-image-builder script is build on the previous one - despite of what the FROM parameter contains (this value is changed "on the fly" by the script).
You can install the docker-image-builder using pip (version for python3, so pip3 exactly), try:
$ pip3 install docker-image-builder
The package site at pypi service is at https://pypi.python.org/pypi/docker-image-builder
Please check the:
$ docker-image-builder --help
for available options.
...comming soon...