Allow forks to publish docker images #188

	name: Build and push Docker image (amd64, arm64 to hub.docker.com and ghcr.io)

	on:
	workflow_dispatch: # allow manual trigger
	# https://github.com/orgs/community/discussions/26276
	push:
	branches:
	- "main"
	- "v*"
	tags:
	- "v*"
	pull_request:
	branches:
	- "main"

	jobs:
	docker:
	runs-on: ubuntu-latest
	steps:
	-
	name: Checkout
	uses: actions/checkout@v4
	-
	name: Set environment variables
	run: \|
	echo "BRANCH=${GITHUB_REF#refs/heads/}" >> $GITHUB_ENV
	echo "NOW=$(date -R)" >> $GITHUB_ENV # date -Iseconds; date +'%Y-%m-%dT%H:%M:%S'
	if [[ "${{ env.BRANCH }}" == "main" ]]; then
	echo "IMAGE_TAG=latest" >> $GITHUB_ENV
	else
	echo "IMAGE_TAG=${GITHUB_REF#refs/heads/}" >> $GITHUB_ENV
	fi
	-
	name: Set up QEMU
	uses: docker/setup-qemu-action@v3
	-
	name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	-
	name: Login to Docker Hub
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}
	-
	name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	-
	name: Build and push
	uses: docker/build-push-action@v5
	with:
	context: .
	push: true
	build-args: \|
	COMMIT=${{ github.sha }}
	BRANCH=${{ env.BRANCH }}
	NOW=${{ env.NOW }}
	platforms: linux/amd64,linux/arm64 # ,linux/arm/v7
	tags: \|
	${{ secrets.DOCKERHUB_USERNAME }}/free-games-claimer:${{env.IMAGE_TAG}}
	ghcr.io/${{ github.actor }}/free-games-claimer:${{env.IMAGE_TAG}}
	cache-from: type=gha
	cache-to: type=gha,mode=max

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