docker-image.yml

name: Docker build and push

# limit concurrency
# https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#examples-using-concurrency-and-the-default-behavior
concurrency: docker_cron_main

on:
  push:
    # Only activate for `master` branch
    branches:
      - master
    # Plus for all tags
    tags:
      - '*'

  # Plus for any pull-requests
  pull_request:

env:
  IMAGE_NAME: cron

jobs:
  # Test the image Dockerfile syntax using https://github.com/replicatedhq/dockerfilelint
  test:
    runs-on: ubuntu-latest
    if: github.event_name == 'push' || github.event_name == 'pull_request'
    steps:
      - uses: actions/checkout@v3
      -
        name: Run linter (hadolint)
        uses: hadolint/hadolint-action@v3.1.0
        with:
          dockerfile: "Dockerfile"
          config: "hadolint.yaml"
          no-color: true

  # Push image to GitHub Packages.
  # The image tag pattern is:
  # for pull-requests: <MW_CORE_VERSION>-<DATE>-<PR_NUMBER>, eg: 1.35.2-20210125-25
  # for tags: <TAG>
  # for `master` branch: latest + <DATE>-<SHA>
  # <MW_CORE_VERSION> being parsed from the Dockerfile
  push:
    needs: [test]
    runs-on: ubuntu-latest
    if: github.event_name == 'push' || github.event_name == 'pull_request'
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      -
        name: Generate tags
        id: generate
        run: |

          # Image ID
          IMAGE_ID=ghcr.io/wikiteq/$IMAGE_NAME

          # Date
          BDATE=$(date +%Y%m%d)

          # Change all uppercase to lowercase, just in case
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')

          # Strip git ref prefix from version and use it as suffix for version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')

          # For pull requests just extract the PR number
          PR_NUMBER=""
          [ "${{ github.event_name }}" == "pull_request" ] && VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\)/merge,\1,')
          [ "${{ github.event_name }}" == "pull_request" ] && PR_NUMBER=$VERSION

          # Append version
          [ "${{ github.event_name }}" == "pull_request" ] && VERSION=$BDATE-$VERSION

          # Strip "v" prefix from tag name if it's a tag
          # [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')

          # Use Docker `latest` tag convention if it's a master branch build
          [ "$VERSION" == "master" ] && VERSION=latest

          # Compose REGISTRY_TAGS variable
          REGISTRY_TAGS=$IMAGE_ID:$VERSION

          # For master branch also supply an extra tag: <DATE>-<SHA>
          [ "$VERSION" == "latest" ] && REGISTRY_TAGS=$REGISTRY_TAGS,$IMAGE_ID:$BDATE-$(git rev-parse --short HEAD)

          SHA_SHORT=${{ github.sha }}
          [ "${{ github.event_name }}" == "pull_request" ] && SHA_SHORT=$(echo ${{ github.event.pull_request.head.sha }} | cut -c1-8)
          
          echo IMAGE_ID=$IMAGE_ID
          echo VERSION=$VERSION
          echo REGISTRY_TAGS=$REGISTRY_TAGS
          echo SHA_SHORT=$SHA_SHORT
          echo EventName=${{ github.event_name }}
          
          echo headref=${{ github.head_ref }}
          echo "Final image tag to be pushed:"
          echo $REGISTRY_TAGS
          echo "REGISTRY_TAGS=$REGISTRY_TAGS" >> $GITHUB_OUTPUT
          echo "REGISTRY_TAGS_VERSION=$VERSION" >> $GITHUB_OUTPUT
          echo "REGISTRY_TAGS_PR_NUMBER=$PR_NUMBER" >> $GITHUB_OUTPUT
          echo "SHA_SHORT=$SHA_SHORT" >> $GITHUB_OUTPUT
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          install: true
          platforms: linux/amd64, linux/arm64
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      -
        name: Build and push
        id: docker_build
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64, linux/arm64
          secrets: |
            COMPOSER_TOKEN=${{ secrets.GITHUB_TOKEN }}
          push: true
          tags: ${{ steps.generate.outputs.REGISTRY_TAGS }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
      -
        name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}
      -
        name: Image tags debug
        run: echo ${{ steps.generate.outputs.REGISTRY_TAGS }}

      -
        name: Notify about image tag
        if: github.event_name == 'pull_request' && steps.docker_build.outputs.digest != ''
        uses: hasura/comment-progress@v2.2.0
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          repository: ${{ github.repository }}
          number: ${{ github.event.number }}
          id: comment
          message: ":whale: The image based on [${{ steps.generate.outputs.SHA_SHORT }}](https://github.com/WikiTeq/docker-cron/pull/${{ steps.generate.outputs.REGISTRY_TAGS_PR_NUMBER }}/commits/${{ github.event.pull_request.head.sha }}) commit has been built with `${{ steps.generate.outputs.REGISTRY_TAGS_VERSION }}` tag as [${{ steps.generate.outputs.REGISTRY_TAGS }}](https://github.com/${{ github.repository }}/pkgs/container/${{ env.IMAGE_NAME }}/${{ steps.docker_build.outputs.imageid }}?tag=${{ steps.generate.outputs.REGISTRY_TAGS_VERSION }})"
          recreate: true
          fail: false