Update README for v19 #221

	name: CI Workflow Example

	on:
	pull_request:
	push:
	branches:
	- master

	jobs:
	checks:
	uses: ./.github/workflows/ci-workflow.yml
	secrets:
	nixbuild_token: ${{ secrets.nixbuild_token }}
	with:
	# All settings are optional, the CI Workflow has usable defaults
	# The available settings are documented in ./ci-workflow.yml

	# By default the CI Workflow uses flake.nix from the repository root, but
	# we want it to use our example flake here
	flake_directory: examples/using-the-ci-workflow

	# Tweak the label shown for each job. This is done with a jq expression
	# that produces a string based on the build's fields
	label_builds: '"\(.attr).\(.system)"'

	# We can filter which attributes to build by configuring a jq expression
	# producing a boolean based on the build's fields. We use the same
	# expression that the CI Workflow uses by default here (build everything
	# in the flake's `checks` attribute).
	filter_builds: '.top_attr == "checks"'

	# If ignore_build_failures is set to true, the workflow will not be stopped
	# on build errors, giving us the chance to process the build results in
	# a dependant job. Defaults to false.
	ignore_build_failures: true


	# We create a job that depends on the the ci-workflow and verifies that the
	# build results are what we expected.
	results:
	name: Verify results
	runs-on: ubuntu-latest
	needs: checks
	steps:
	- uses: actions/checkout@v3
	- name: Verify build results
	run: \|
	diff \
	<(jq . ./examples/using-the-ci-workflow/expected-result.json) \
	<(echo '${{ needs.checks.outputs.results }}' \| jq .)

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