add checkstyle job in github action. (#3518)

          mkdir -p ${LOG_DIR}

          docker-compose -f $(pwd)/docker/docker-swarm/docker-compose.yml logs dolphinscheduler-postgresql > ${LOG_DIR}/db.txt

        continue-on-error: true

  Checkstyle:

    name: Check code style

    runs-on: ubuntu-latest

    steps:

      - name: Checkout

        uses: actions/checkout@v2

      # In the checkout@v2, it doesn't support git submodule. Execute the commands manually.

      - name: checkout submodules

        shell: bash

        run: |

          git submodule sync --recursive

          git -c protocol.version=2 submodule update --init --force --recursive --depth=1

      - name: check code style

        env:

          WORKDIR: ./

          REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}

          CHECKSTYLE_CONFIG: style/checkstyle.xml

          REVIEWDOG_VERSION: v0.10.2

        run: |

          wget -O - -q https://github.com/checkstyle/checkstyle/releases/download/checkstyle-8.22/checkstyle-8.22-all.jar > /opt/checkstyle.jar

          wget -O - -q https://raw.githubusercontent.com/reviewdog/reviewdog/master/install.sh | sh -s -- -b /opt ${REVIEWDOG_VERSION}

          java -jar /opt/checkstyle.jar "${WORKDIR}" -c "${CHECKSTYLE_CONFIG}"  -f xml \

               | /opt/reviewdog -f=checkstyle \

                    -reporter="${INPUT_REPORTER:-github-pr-check}" \

                    -filter-mode="${INPUT_FILTER_MODE:-added}" \

                    -fail-on-error="${INPUT_FAIL_ON_ERROR:-false}"

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