zclconf/go-zcl

This package implements a language extension that allows configuration
authors to include the content of another file into a body, using syntax
like this:

  include {
    path = "./foo.zcl"
  }

This is implemented as a transform.Transformer so that it can be used
as part of a transform chain when decoding nested block structures to
allow includes at any arbitrary point.

This capability is not built into the language because certain
applications will offer higher-level constructs for connecting multiple
separate config files, which may e.g. have a separate evaluation scope
for each file, etc.