ci: add static validation checks for sample assets #1

	name: Static Checks

	# Runs fast, offline static validation of the sample assets (OpenJD templates,
	# host configuration scripts, CloudFormation templates, and Conda recipes) so
	# that problems -- for example a host configuration script that exceeds the
	# service's size limit -- are caught in CI instead of by a customer.

	on:
	push:
	branches: ["mainline"]
	pull_request:
	branches: ["mainline"]

	permissions:
	contents: read

	concurrency:
	group: static-checks-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	static-checks:
	name: Static validation
	runs-on: ubuntu-latest
	steps:
	- name: Check out repository
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"
	# Cache pip downloads keyed on the test requirements file so the
	# openjd-cli / cfn-lint install is restored from cache on unchanged runs.
	cache: pip
	cache-dependency-path: tests/requirements.txt

	- name: Install test dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -r tests/requirements.txt

	- name: Run static checks
	working-directory: tests
	run: python -m pytest -v

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