Can't replace scullySystem plugins in config file

[gregorymaertens]

🐞 Bug report

Description

I was trying to write my own WriteToStorage plugin, but it was never called.
Investigating the issue I have found out the reason for it:
in /src/lib/utils/handlers/renderParallel.ts the plugin is fetched while executing the following static code:
const writeToFs = findPlugin(WriteToStorage);

That's done before the configuration is compiled and executed, as a result any attempt to replace the plugin won't have any effect.

A simple fix for this would be to fetch the plugin only when needed it:

let writeToFs;

const reThrow = (e) => {
  throw new Error(e);
};
let executePluginsForRoute;

export async function renderParallel(dataRoutes: any[]): Promise {
  writeToFs = writeToFs || findPlugin(WriteToStorage); // defer init of writeToFs till it's needed and avoid calling findPlugin() all the time
executePluginsForRoute = executePluginsForRoute  || findPlugin(renderRoute);
...

NOTE:

🔬 Minimal Reproduction

add a

💻Your Environment

Angular Version:

Angular CLI: 13.3.10
Node: 16.14.2
Package Manager: npm 8.5.0
OS: darwin x64

Angular: 13.3.12
... animations, common, compiler, compiler-cli, core, forms
... localize, platform-browser, platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1303.10
@angular-devkit/build-angular   13.3.10
@angular-devkit/core            13.3.10
@angular-devkit/schematics      13.3.10
@angular/cdk                    13.3.9
@angular/cli                    13.3.10
@angular/material               13.3.9
@schematics/angular             13.3.10
rxjs                            7.8.0
typescript                      4.6.4

Scully Version:

  "@scullyio/init": "^2.1.41",
    "@scullyio/ng-lib": "^2.1.0",
    "@scullyio/scully": "^2.1.0",
    "@scullyio/scully-plugin-puppeteer": "^2.1.0",

🔥 Exception or Error