name: Push PR Image on Label

on:
  pull_request:
    branches:
      - master
    types: [ labeled ]
    paths:
      - '!.markdownlint.yaml'
      - '!.vale.ini'
      - '!Dockerfile-docs'
      - '!docs-nginx.conf'
      - '!docs/**'
      - '!theme_common'
      - '!theme_override'
      - '!deployments/kubernetes/chart/reloader/**'

env:
  DOCKER_FILE_PATH: Dockerfile
  REGISTRY: ghcr.io

jobs:

  build-and-push-pr-image:
    permissions:
      contents: read

    runs-on: ubuntu-latest
    name: Build and Push PR Image
    if: ${{ github.event.label.name == 'build-and-push-pr-image' }}
    steps:
    - name: Check out code
      uses: actions/checkout@v4
      with:
        ref: ${{github.event.pull_request.head.sha}}
        fetch-depth: 0

    - name: Set up Go
      uses: actions/setup-go@v5
      with:
        go-version-file: 'go.mod'
        check-latest: true
        cache: true

    - name: Install Dependencies
      run: |
        make install

    - name: Run golangci-lint
      uses: golangci/golangci-lint-action@v5
      with:
        version: latest
        only-new-issues: false
        args: --timeout 10m

    - name: Generate Tags
      id: generate_tag
      run: |
        sha=${{ github.event.pull_request.head.sha }}
        tag="SNAPSHOT-PR-${{ github.event.pull_request.number }}-${sha:0:8}"
        echo "GIT_TAG=$(echo ${tag})" >> $GITHUB_OUTPUT

    - name: Set up QEMU
      uses: docker/setup-qemu-action@v3

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3

    - name: Generate image repository path for ghcr registry
      run: |
        echo GHCR_IMAGE_REPOSITORY=${{env.REGISTRY}}/$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV

    - name: Login to ghcr registry
      uses: docker/login-action@v3
      with:
        registry: ${{env.REGISTRY}}
        username: stakater-user
        password: ${{secrets.GITHUB_TOKEN}}

    - name: Build Docker Image
      uses: docker/build-push-action@v6
      with:
        context: .
        file: ${{ env.DOCKER_FILE_PATH  }}
        pull: true
        push: true
        build-args: BUILD_PARAMETERS=${{ env.BUILD_PARAMETERS }}
        cache-to: type=inline
        platforms: linux/amd64,linux/arm,linux/arm64
        tags: |
          ${{ env.GHCR_IMAGE_REPOSITORY }}:${{ steps.generate_tag.outputs.GIT_TAG }}
        labels: |
          org.opencontainers.image.source=${{ github.event.repository.clone_url }}
          org.opencontainers.image.created=${{ steps.prep.outputs.created }}
          org.opencontainers.image.revision=${{ github.sha }}