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minimum modules requirements #24

	name: Build

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

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

	env:
	NS3_VERSION: "3.46.1"
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build:
	name: Build Docker Image
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write

	outputs:
	image-digest: ${{ steps.build.outputs.digest }}
	image-metadata: ${{ steps.meta.outputs.json }}

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Log in to GHCR
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	tags: \|
	# branch builds get a sha label, not a published tag
	type=sha,prefix=sha-,format=short

	- name: Build (no push)
	id: build
	uses: docker/build-push-action@v6
	with:
	context: .
	file: Dockerfile
	push: false
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	build-args: NS3_VERSION=${{ env.NS3_VERSION }}
	cache-from: \|
	type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/cache:builder-amd64
	cache-to: \|
	type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/cache:builder-amd64,mode=max
	provenance: false

	- name: Image size report
	run: \|
	docker image inspect \
	$(docker images -q \| head -1) \
	--format '{{.RepoTags}} — {{.Size}} bytes' \|\| true