templated_test_publish_pipeline.yml

name: Update Docker Image Reference on PR

on:
  pull_request:
    paths:
      - 'templated_tests/**'
  push:
    branches:
      - main
    paths:
      - 'templated_tests/**'

jobs:
  changed-files:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.changed-files.outputs.all_changed_files }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          matrix: true
          dir_names: true
          files: |
            templated_tests/**
          files_ignore: |
            templated_tests/README.md

  build-and-push-image:
    needs: changed-files
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix: 
        files: ${{fromJson(needs.changed-files.outputs.matrix)}}
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Log in to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Get Docker image name
        id: image_name
        run: |
          image_name=$(echo ${{ matrix.files }} | sed 's/templated_tests\///')
          echo "::set-output name=image_name::${{ secrets.DOCKERHUB_USERNAME }}/$image_name"

      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ steps.image_name.outputs.image_name }}
          tags: |
            type=raw,value={{sha}},event=pr
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Build and push Docker image to DockerHub
        uses: docker/build-push-action@v6
        with:
          context: ${{ matrix.files }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}