Provide guidance on required and null properties #344

	name: Build Check

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	check-schema:
	runs-on: ubuntu-latest
	steps:
	- name: check out code
	uses: actions/checkout@v2

	- name: install dependencies
	run: npm install

	- name: compile schema
	run: make compile-schema

	- name: validate example
	run: make validate-examples

	- name: generate descriptions
	run: make generate-descriptions

	- name: check for diff
	run: \|
	# need to "git add" to detect any changes to descriptions which are not checked in
	# select files from both /examples
	git add examples**
	if git diff --cached --quiet
	then
	echo "No diff detected."
	else
	echo "Diff detected - did you run 'make generate-descriptions'?"
	echo $(git diff --cached --name-only)
	echo $(git diff --cached)
	exit 1
	fi

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