Add WCMs to existing categories #369

	# This is a basic workflow to help you get started with Actions

	name: CI Labels

	# Controls when the workflow will run
	on:
	pull_request:
	types:
	# default types (i.e. default for on: pull_request)
	- opened
	- synchronize
	- reopened
	# trigger on change of labels
	- labeled
	- unlabeled
	branches:
	- develop-v3
	- develop-v2

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Check PR Labels
	uses: actions/github-script@v5
	with:
	script: \|
	const VALID_LABELS_MESSAGE = 'Success! PR has valid labels.'
	const BREAKING_LABELS = ['Breaking Change', 'Non-breaking Change']

	const labelNames = context.payload.pull_request.labels.map(label => label.name)
	console.log(`INFO: Found PR labels: ${labelNames}`)

	const assertExactlyOneOf = (choices) => {
	const foundLabels = []
	for (let choice of choices) {
	if (labelNames.includes(choice)) {
	foundLabels.push(choice)
	}
	}

	if (foundLabels.length === 1) {
	return true
	}
	else if (foundLabels.length === 0) {
	throw `PR is missing one of the labels: ${choices}`
	}
	else {
	throw `Expected PR to include exactly one label from ${choices}; Found ${foundLabels}`
	}
	}

	if (labelNames.length === 1 && labelNames[0] === 'ignore') {
	console.log(VALID_LABELS_MESSAGE)
	return
	}

	if (labelNames.length === 1 && labelNames[0] === 'No Schema Changes') {
	console.log(VALID_LABELS_MESSAGE)
	return
	}

	assertExactlyOneOf(BREAKING_LABELS)
	if (!labelNames.some(label => label.startsWith('Schema:'))) {
	throw `PR is missing a scoping label, i.e., a label starting with "Schema: ..." or "Schema: No Changes"`
	}
	console.log(VALID_LABELS_MESSAGE)

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