name: Hadolint

on:
  push:
    paths:
      - "docker/**"

  pull_request:
    paths:
      - "docker/**"

jobs:
  hadolint:
    name: Validate Dockerfile syntax
    runs-on: ubuntu-20.04
    steps:
      # Checkout the repo
      - name: Checkout
        uses: actions/checkout@v2
      # End Checkout the repo


      # Download hadolint
      - name: Download hadolint
        shell: bash
        run: |
          sudo curl -L https://github.com/hadolint/hadolint/releases/download/v${HADOLINT_VERSION}/hadolint-$(uname -s)-$(uname -m) -o /usr/local/bin/hadolint && \
          sudo chmod +x /usr/local/bin/hadolint
        env:
          HADOLINT_VERSION: 2.7.0
      # End Download hadolint

      # Test Dockerfiles
      - name: Run hadolint
        shell: bash
        run:  git ls-files --exclude='docker/*/Dockerfile*' --ignored --cached | xargs hadolint
      # End Test Dockerfiles