pr-verify.yaml

name: PR-verify

on:
  pull_request:
    branches:
      - main

jobs:
  changed-files:
    name: Detect changed dockerfiles
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.changed-files.outputs.all_changed_files }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Get changed dockerfiles
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          matrix: true
          files: |
            Dockerfile
  
  lint-dockerfiles:
    name: Lint dockerfiles with hadolint
    runs-on: ubuntu-latest
    needs: [changed-files]
    strategy:
      matrix: 
        files: ${{ fromJSON(needs.changed-files.outputs.matrix) }}
      max-parallel: 4
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Run hadolint
        uses: hadolint/hadolint-action@v3.1.0
        with:
          dockerfile: ${{ matrix.files }}