docker-publish.yml

# Publishes docker image, pinning actions to a commit SHA,
# and updating most recently built image with the latest tag.
# Can be triggered by either pushing a commit that changes the `Dockerfile`, 
# or manually dispatching the workflow.

name: Publish Docker image

on: 
  workflow_dispatch:
  push: 
    paths: 
      - 'Dockerfile'
      - 'conda-linux-64.lock'
      
jobs:
  push_to_registry:
    name: Push Docker image to Docker Hub
    runs-on: ubuntu-latest
    steps:
      - name: Check out the repo
        uses: actions/checkout@v4
      
      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: gur5/heart-failure-prediction
          tags: |
            type=raw, value={{sha}},enable=${{github.ref_type != 'tag' }}
            type=raw, value=latest
      
      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      - name: Update docker-compose.yml with new image tag
        if: success()
        run: |
          sed -i "s|image:  gur5/heart-failure-prediction:.*|image:  gur5/heart-failure-prediction:${{ steps.meta.outputs.version }}|" docker-compose.yml

      - name: Commit and push updated docker-compose.yml
        if: success()
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git add docker-compose.yml
          git commit -m "Update docker-compose.yml with new image tag"
          git push