message: Use pip and rlib cache on Travis
diff: @@ -48,13 +48,15 @@ matrix:
  - language: r
  r:
  - 3.5
  + cache:
  + packages: true
  + directories:
  + - $HOME/.cache/pip
  before_install:
  - bash -x ${TRAVIS_BUILD_DIR}/.travis/python.configure.sh
  - pip install --upgrade --ignore-installed --user travis tensorflow-io pyarrow==0.11.1
  - echo "options(repos = c(CRAN='http://cran.rstudio.com'))" >> ~/.Rprofile
  - cd R-package
  - script:
  - - R -e "devtools::test()"
  notifications:
  email: false
  