Multi-platform build #47

	name: Build docker image

	on:
	push:
	branches: [ master ]
	tags:
	- 'v..*'
	paths:
	- 'src/**.c'
	- 'Dockerfile'
	pull_request:
	branches: [ master ]

	jobs:
	test:
	name: Run tests
	runs-on: ubuntu-latest
	steps:
	- name: Check Out Repo
	uses: actions/checkout@v4
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Merge build image & test image
	run: cat Dockerfile Dockerfile.test > Dockerfile.merged
	- name: Test
	id: docker_test_image
	uses: docker/build-push-action@v5
	with:
	context: ./
	file: ./Dockerfile.merged
	push: false
	cache-from: type=gha,scope=main
	cache-to: type=gha,mode=max,scope=main
	build:
	needs:
	- test
	name: Build image
	runs-on: ubuntu-latest
	steps:
	- name: Check Out Repo
	uses: actions/checkout@v4
	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: \|
	ghcr.io/${{ github.repository }}
	tags: \|
	type=semver,pattern={{raw}}
	type=raw,value=latest,enable={{is_default_branch}}
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Login to GitHub Container Registry
	if: github.event_name != 'pull_request'
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Build
	id: docker_build_image
	uses: docker/build-push-action@v5
	with:
	context: ./
	platforms: linux/amd64,linux/arm64
	file: ./Dockerfile
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	cache-from: type=gha,scope=main
	cache-to: type=gha,mode=max,scope=main

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