Github user Leemoonsoo commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/710#issuecomment-183588484
Another approach would be https://docs.travis-ci.com/user/caching/. It
seems travis-ci capable of cache directory when it is configured to [use
container based
infrastructure](https://docs.travis-ci.com/user/workers/container-based-infrastructure/).
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