commit ce83108c40eea7900a627eed9a4e0c5c18373525
author Hector Dearman <hjd@google.com> Thu Jun 23 15:10:04 2022 +0100
committer Hector Dearman <hjd@google.com> Thu Jun 23 15:10:04 2022 +0100
tree 7d61f7e8bddb6f0580e9dfe9eedc2bc183b5152a
parent 8cafb589b7e414c21a0ef2647fd30c1d1a3a0572

ui: Add initial plugin architecture

Builds on the existing track importer script to make it work more
'plugin' like. Rather than the plugin importing parts of the core the
plugin instead exposes a single function ('activate') which takes will
eventually take a 'plugin interface' which is how the plugin actually
extends the system.

As a first step towards that this:
- Creates a plugin registory
- Extends registries generally to support iteration
- Adds a (currently empty) activate() function to each track.
- Calls activate for every registered plugin at page load
- Updates tools/gen_ui_imports to generate code like:

import {pluginRegistry} from '../common/plugins';

import {activate as fooTrack} from '../tracks/foo_track';
import {activate as barTrack} from '../tracks/bar_track';

pluginRegistry.register({
  kind: 'fooTrack',
  activate: fooTrack,
});
pluginRegistry.register({
  kind: 'barTrack',
  activate: barTrack,
});


Change-Id: I475e4ee49642568ecc868e43904cf0d35557818e