BuildFromConfig builds directly from `changes`, treating it as if it were the contents of a Dockerfile It will: - Call parse.Parse() to get an AST root for the concatenated Dockerfile entries.

NewBuildArgs creates a new BuildArgs type.

NewBuildManager creates a BuildManager.

BuildArgs manages arguments used by the builder.

Builder is a Dockerfile builder It implements the builder.Backend interface.

BuildManager is shared across all Builder objects.

ImageProber exposes an Image cache to the Builder.