name: Linter
on: pull_request
jobs:
  HadoLint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - id: files
        uses: jitterbit/get-changed-files@v1
        continue-on-error: true

      - name: Run checks
        env:
          HADOLINT: "${{ github.workspace }}/hadolint"
          HADOLINT_VER: "2.1.0"
          VERIFICATION_LEVEL: "error"
          PR_FILES_AM: ${{ steps.files.outputs.added_modified }}
          PR_FILES_RENAMED: ${{ steps.files.outputs.renamed }}
        run: |
          PR_FILES="$PR_FILES_AM $PR_FILES_RENAMED"
          for FILE in $PR_FILES; do
              if [[ $FILE =~ 'Dockerfile' ]]; then
                  CHANGED_FILES+=" $FILE"
              fi
          done

          if [[ ! -z $CHANGED_FILES ]]; 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_FILES)
            mkdir -p hadolint_report

            $HADOLINT --no-fail --format json $CHANGED_FILES > ./hadolint_report/hadolint_report.json
            GET_VERIFICATION_LEVEL=$(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