Test that image layers and compose volumes are getting cached #10

	name: CI

	on:
	push:
	pull_request:
	branches: [main]

	jobs:
	setup-and-cache:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: docker/setup-buildx-action@v3
	- uses: docker/setup-compose-action@v1
	- uses: ./
	with:
	volumes: \|
	node_modules: ${{ hashFiles('package-lock.json') }}
	- run: bin/setup

	test:
	needs: setup-and-cache
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: docker/setup-buildx-action@v3
	- uses: docker/setup-compose-action@v1
	- uses: ./
	with:
	volumes: \|
	node_modules: ${{ hashFiles('package-lock.json') }}
	- name: Verify caches are used
	run: \|
	output=$(bin/setup 2>&1)
	# Check that all build steps (except FROM) have a CACHED line
	for step in $(echo "$output" \| grep -E '^#[0-9]+ \[[0-9]+/[0-9]+\]' \| grep -v FROM \| grep -oE '^#[0-9]+'); do
	if ! echo "$output" \| grep -q "^${step} CACHED"; then
	echo "::error::Step $step was rebuilt instead of using cache"
	echo "$output"
	exit 1
	fi
	done
	echo "All build steps used cache."
	if echo "$output" \| grep -q "added"; then
	echo "::error::Packages were downloaded instead of using cached node_modules"
	echo "$output"
	exit 1
	fi
	echo "node_modules cache was used."

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