05-add-comment.yaml

---
name: 05 Build and Comment

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  build-image:
    name: Build Images
    runs-on: ubuntu-latest

#NEW: (START) ##########################################################
    permissions:
      pull-requests: write # needed to create and update comments in PRs
#NEW: (END) ############################################################

    steps:

      - 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: Docker meta
        id: docker_meta
        uses: docker/metadata-action@v5
        with:
          images: bretfisher/docker-ci-automation
          flavor: |
            latest=false
          tags: |
            type=raw,value=05
            type=raw,value=latest,enable=${{ endsWith(github.ref, github.event.repository.default_branch) }}
            type=ref,event=pr
            type=ref,event=branch
            type=semver,pattern={{version}}
      
      - name: Docker build
        uses: docker/build-push-action@v6
        with:
          push: false # false for this demo to prevent overwriting image tags of other examples
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64,linux/arm/v7


#NEW: (START) ##########################################################
        # If PR, put image tags in the PR comments
        # from https://github.com/marketplace/actions/create-or-update-comment
      - name: Find comment for image tags
        uses: peter-evans/find-comment@v3
        if: github.event_name == 'pull_request'
        id: fc
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: Docker image tag(s) pushed
      
        # If PR, put image tags in the PR comments
      - name: Create or update comment for image tags
        uses: peter-evans/create-or-update-comment@v4
        if: github.event_name == 'pull_request'
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            Docker image tag(s) pushed:
            ```text
            ${{ steps.docker_meta.outputs.tags }}
            ```

            Labels added to images:
            ```text
            ${{ steps.docker_meta.outputs.labels }}
            ```
          edit-mode: replace
#NEW: (END) ############################################################