相关疑难解决方法(0)

我试图运行以下步骤，但它不执行“如果”步骤（第5和第6行）（我很确定它们应该是不存在的，因为要测试的目录不存在，我尝试了多种bash格式，但它们都失败了，是否有一种方法可以测试比我正在使用的条件更好的条件？

   - step:
      name: Google Cloud SDK Installation
      caches:
        - pip
        - cloudsdk
      script:
        - export ENV=dev
        - source scripts/setenv.sh
        - export CLOUDSDK_CORE_DISABLE_PROMPTS=1
        - SDK_FILENAME=google-cloud-sdk-$SDK_VERSION-linux-x86_64.tar.gz
        - if [ ! -e ${HOME}/google-cloud-sdk ] ; then `curl -O -J https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/${SDK_FILENAME}`; fi
        - if [ ! -e ${HOME}/google-cloud-sdk ] ; then `tar -zxvf ${SDK_FILENAME} --directory ${HOME}`; fi
        - export PATH=${PATH}:${HOME}/google-cloud-sdk/bin
        - GAE_PYTHONPATH=${HOME}/google_appengine
        - export PYTHONPATH=${PYTHONPATH}:${GAE_PYTHONPATH}
        - python scripts/fetch_gae_sdk.py $(dirname "${GAE_PYTHONPATH}")