name: Linter
on: pull_request
jobs:
  HadoLint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - name: Run checks
        env:
          HADOLINT: "${{ github.workspace }}/hadolint"
          HADOLINT_VER: "2.1.0"
          VERIFICATION_LEVEL: "error"
        run: |
          URL="https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}/files"
          PR_FILES=$(curl -s -X GET -G $URL | jq -r '.[] | select(.status != "removed") | .filename')
          for file in $PR_FILES; do
            if [[ ${file} =~ 'Dockerfile' ]]; then
              changed_dockerfiles+=" ${file}"
            fi
          done

          if [[ ! -z ${changed_dockerfiles} ]]; then
            curl -sL -o ${HADOLINT} "https://github.com/hadolint/hadolint/releases/download/v${HADOLINT_VER}/hadolint-Linux-x86_64" && chmod 700 ${HADOLINT}
            echo "HadoLint version: "`${HADOLINT} --version`
            echo "The files will be checked: "`echo ${changed_dockerfiles}`
            mkdir -p hadolint_report

            ${HADOLINT} --no-fail --format json ${changed_dockerfiles} > ./hadolint_report/hadolint_report.json
            get_verification_level=`cat ./hadolint_report/hadolint_report.json | jq -r '.[] | .level'`
            for line in ${get_verification_level}; do
              if [[ ${line} =~ ${VERIFICATION_LEVEL} ]]; then
                pip install json2html
                python ./tests/json_to_html.py ./hadolint_report/hadolint_report.json
                exit 1
              else
                exit 0
              fi
            done
          else
            echo "No files with the \"Dockerfile*\" name found"
          fi

      - name: Upload artifacts
        if: failure()
        uses: actions/upload-artifact@v2
        with:
          name: hadolint_report
          path: hadolint_report