Anaconda modularization

Summary

Anaconda installer will be split into several modules that will communicate over DBus with stable API.

Owner

Name: Jiří Konečný
Email: jkonecny@redhat.com
Release notes owner:

Current status

Targeted release: Fedora 28
Last updated: 2018-01-03
Tracker bug: <will be assigned by the Wrangler>

Detailed Description

Anaconda will be split into several modules that will communicate over DBus. The goal is to introduce a stable way to interact with Anaconda to support its customization, extensibility and testability. It will be easier to monitor the installation, maintain an install class or an addon, drop some modules or provide your own UI.

Benefit to Fedora

Anaconda addons have stable API to work with.
Users can create their own UI or even UI less installation.
Anaconda modules can be enabled and disabled or even not present in the installation environment.
Better test-ability of Anaconda -- more stable versions.

Scope

Proposal owners:
- Split Anaconda to modules with DBus API.
- Old UI must be rewritten to use new DBus API.

Other developers:
- Thanks to the nature of how addons work right now we need cooperation during the transition period of addon developers.

Release engineering: #Releng issue number (a check of an impact with Release Engineering is needed)
- List of deliverables: N/A (not a System Wide Change)

Policies and guidelines: N/A (not a System Wide Change)

Trademark approval: N/A (not needed for this Change)