Config Plugins

This is a Feature Proposal

Description

• What is the use case that should be solved. The more detail you describe this in the easier it is to understand for us.

I wrote the serverless-plugin-parent plugin to try and pull common configuration into a central place, with the intention of reducing the amount of configuration needed in large multi-service projects. I basically merged the parent serverless.yml with services serverless.yml in the Plugin's constructor. Unfortunately this does come in a bit late during the initialisation process, and is rather unreliable. Would it be possible to create a special kind Plugin, ie. Configuration Plugin. That could be loaded prior to the Core Plugins, without any hooks or commands, whose sole purpose is to edit the Service Model.

• If there is additional config how would it look

service: Service1

config-plugins:
  - serverless-plugin-parent

Similar or dependent issues:
*

The proposal names no repository files or tests; begin by tracing configuration loading and plugin initialization around the Service Model and Core Plugins, using serverless-plugin-parent as the behavioral example. Done would require an agreed config-plugins syntax and reliable Service Model changes before core plugins, with tests covering that lifecycle.