Driver

A driver is a tool that already knows how to build docker images. Stevedore is an intermediate between the Docker end-user and those tools which can perform a Docker image build.

Based on the images-tree, the builder options and the stevedore CLI command flags, Stevedore prepares all required parameters that define the Docker image and passes them to the driver to build the Docker image.

To build a Docker image, a driver receives the parameters defined on the builder’s variables-mapping, the image vars and the image persistent_vars.