具有代码质量的Gitlab ci:此Gitlab ci配置无效

image: maven:latest

stages:
  - code_quality
  - build

code_quality:
  image: docker:stable
  variables:
    DOCKER_DRIVER: overlay2
  allow_failure: true
  services:
    - docker:stable-dind
  script:
    - export SP_VERSION=$(echo "$CI_SERVER_VERSION" | sed 's/^\([0-9]*\)\.\([0-9]*\).*/\1-\2-stable/')
    - docker run
        --env SOURCE_CODE="$PWD"
        --volume "$PWD":/code
        --volume /var/run/docker.sock:/var/run/docker.sock
        "registry.gitlab.com/gitlab-org/security-products/codequality:$SP_VERSION" /code
  artifacts:
    paths: [gl-code-quality-report.json]

build:
  stage: build
  script:
    - mvn compile

https://gitlab.com/tyvain/mvn-ci-test/blob/master/.gitlab-ci.yml

在代码质量方面,我无法使用官方gitlab示例: https://docs.gitlab.com/ee/ci/examples/code_quality.html

错误是:“此GitLab CI配置无效:code\u quality job:stage参数应为code\u quality,build”