你遇到这个问题是因为在Travis CI上没有可能的交互。因此，安装脚本被阻止等待输入，而Travis CI会在10分钟后终止构建。

诀窍是在安装Google Cloud SDK时禁用提示。这可以通过将 CLOUDSDK_CORE_DISABLE_PROMPTS 环境变量设置为 1 。

下面是一个示例菜谱，放在.travis.yml文件中（包括缓存它以便更快的后续构建）：

 缓存：
目录：
  - $ HOME / google-cloud-sdk /
脚本：
  -  gcloud版本||真
  -  if [！ -d$ HOME / google-cloud-sdk / bin];然后rm -rf $ HOME / google-cloud-sdk;导出CLOUDSDK_CORE_DISABLE_PROMPTS = 1;卷曲https://sdk.cloud.google.com |庆典; fi 
＃将gcloud添加到$ PATH 
  -  source /home/travis/google-cloud-sdk/path.bash.inc 
  -  gcloud版本
 $ p> 

希望这有助于您！
 
I have tried to install Google Cloud SDK on Travis with the following .travis.yml
sudo: required

language: go

- curl https://sdk.cloud.google.com | bash;
My attempt is inspired by this guide from Google: https://cloud.google.com/solutions/continuous-delivery-with-travis-ci

Unfortunately, I get this output on Travis:
$ curl https://sdk.cloud.google.com | bash;
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   421    0   421    0     0  17820      0 --:--:-- --:--:-- --:--:-- 60142
Downloading Google Cloud SDK install script: https://dl.google.com/dl/cloudsdk/channels/rapid/install_google_cloud_sdk.bash
######################################################################## 100.0%
Running install script from: /tmp/tmp.uz8jP70e56/install_google_cloud_sdk.bash
which curl
curl -# -f https://dl.google.com/dl/cloudsdk/channels/rapid/google-cloud-sdk.tar.gz
######################################################################## 100.0%
Installation directory (this will create a google-cloud-sdk subdirectory) (/home/travis): 
Travis waits for 10 minutes and then terminates the build. It seems like it is waiting for an installation directory.

How do I install Google Cloud SDK on Travis?
You are running into this issue because there is no interaction possible on Travis CI. Hence, the installation script is blocked waiting for input and Travis CI kills the build after 10 minutes.

The trick is to disable the prompts when installing the Google Cloud SDK. This can be done by setting the CLOUDSDK_CORE_DISABLE_PROMPTS environment variable to 1.

Here's a sample recipe to put in your .travis.yml file (including caching it for faster subsequent builds):
cache:
  directories:
    - "$HOME/google-cloud-sdk/"
script:
  - gcloud version || true
  - if [ ! -d "$HOME/google-cloud-sdk/bin" ]; then rm -rf $HOME/google-cloud-sdk; export CLOUDSDK_CORE_DISABLE_PROMPTS=1; curl https://sdk.cloud.google.com | bash; fi
  # Add gcloud to $PATH
  - source /home/travis/google-cloud-sdk/path.bash.inc
  - gcloud version
Hope this helps!