image.yaml

name: Build image

on:
  workflow_call:
    outputs:
      image:
        description: "Image uri"
        value: ${{ jobs.push.outputs.image }}
      tag:
        description: "Image tag"
        value: ${{ jobs.push.outputs.tag }}

env:
  IMAGE_NAME: kfd-flask

jobs:
  # Push image to GitHub Packages.
  # See also https://docs.docker.com/docker-hub/builds/
  push:
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
    outputs:
      image: ${{ steps.build.outputs.image }}
      tag: ${{ steps.build.outputs.tag }}

    steps:
      - uses: actions/checkout@v3

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Log in to registry
        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin

      - name: Build and push image
        id: build
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME

          # Change all uppercase to lowercase
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          # Strip "v" prefix from tag name
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
          # Use Docker `latest` tag convention
          [ "$VERSION" == "master" ] && VERSION=latest
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION

          docker buildx build . --file Dockerfile --tag $IMAGE_ID:$VERSION \
            --label "runnumber=${GITHUB_RUN_ID}" \
            --label "org.opencontainers.image.source=https://github.com/${GITHUB_REPOSITORY}" \
            --platform linux/amd64,linux/arm64 --push

          echo "image=$IMAGE_ID" >> $GITHUB_OUTPUT
          echo "tag=$VERSION" >> $GITHUB_OUTPUT