name: Docker Lint

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

permissions:
  contents: read

concurrency: 
  group: docker-lint-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  docker-lint:
    runs-on: ubuntu-latest

    name: docker-lint

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install npm and dockerfilelint
        run: |
          sudo apt-get install nodejs npm -y
          npm install -g dockerfilelint
          wget https://github.com/replicatedhq/dockerfilelint/pull/184.patch -O /usr/local/lib/node_modules/dockerfilelint/184.patch
          CURRENT_DIR=$PWD
          cd /usr/local/lib/node_modules/dockerfilelint/
          git apply 184.patch
          cd $CURRENT_DIR
          cat << RULES > ./.dockerfilelintrc
          rules:
            sudo_usage: off
          RULES

      - name: run lint
        run: |
          DOCKERFILES="$(find ./Containers -name Dockerfile)"
          mapfile -t DOCKERFILES <<< "$DOCKERFILES"
          for file in "${DOCKERFILES[@]}"; do
            dockerfilelint "$file" --config ./ | tee -a ./dockerfilelint.log
          done
          if grep "^Issues: [0-9]" ./dockerfilelint.log; then
            exit 1
          fi