Description

As indicated by our roadmap, we want the builder to be pulled out of the Engine. The end goal is that the daemon should know nothing about the Dockerfile.

The lack of ability to copy files to a container makes it impossible to fully implement the builder using exclusively the API. We have ongoing PR for this, that would be a prerequisite for this PR:

• docker cp to and from containers #13171: docker cp to and from containers
• docker cp++ #14058: more docker cp

Apparently @jlhawn also has work on his fork for a client-side builder.

How to

• Help review and merge the docker cp PR mentioned above
• Help review and see what pieces of @jlhawn can be integrated in the Engine