Improve random system generation, load custom systems from JSON #984

	# Check all pull requests against the clang-format rules.

	name: Clang Format

	# Controls when the action will run.
	# Run clang-format checks on all pull-requests
	on:
	pull_request:
	paths:
	- 'src/**.cpp'
	- 'src/**.h'

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}-format
	cancel-in-progress: ${{ github.ref == 'refs/heads/master' }}

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	clang-format-check:
	timeout-minutes: 5

	# Ubuntu 18.04 at the time of writing includes clang-format-9 as default
	runs-on: [ubuntu-20.04]

	# We want to check all changed files between the pull-request base and the head of the pull request
	env:
	FORMAT_BASE: ${{ github.base_ref }}

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:

	# Checkout the repository as $GITHUB_WORKSPACE
	- uses: actions/checkout@v3

	# Make sure to include the base we want to merge into
	- run: \|
	git fetch --no-tags --depth=1 origin ${{ github.base_ref }}:${{ github.base_ref }}

	# Run the clang-format command (in $GITHUB_WORKSPACE, which is where the repo is checked out to)
	- name: Run clang-format
	run: ./scripts/clang-format.sh

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