Travis settings for Shiny testing

.travis.yml

dist: trusty   # Use Ubuntu 14.04 image (instead of 12.04)
language: r
sudo: false
r: 3.4.1

# Install packrat if needed and have it restore packages.
install:
  - R -e 'if (system.file(package="packrat") == "") install.packages("packrat")'
  - R -e "packrat::packify(); packrat::restore()"

cache:
  # Main R library
  packages: true
  directories:
    # Packrat packages
    - packrat/lib
    # PhantomJS
    - travis_phantomjs

# Install PhantomJS (if not cached)
before_install:
  - "export PHANTOMJS_VERSION=2.1.1"
  - "phantomjs --version"
  - "export PATH=$PWD/travis_phantomjs/phantomjs-$PHANTOMJS_VERSION-linux-x86_64/bin:$PATH"
  - "hash -r"
  - "phantomjs --version"
  - "if [ $(phantomjs --version) != $PHANTOMJS_VERSION ]; then rm -rf $PWD/travis_phantomjs; mkdir -p $PWD/travis_phantomjs; fi"
  - "if [ $(phantomjs --version) != $PHANTOMJS_VERSION ]; then wget https://github.com/Medium/phantomjs/releases/download/v$PHANTOMJS_VERSION/phantomjs-$PHANTOMJS_VERSION-linux-x86_64.tar.bz2 -O $PWD/travis_phantomjs/phantomjs-$PHANTOMJS_VERSION-linux-x86_64.tar.bz2; fi"
  - "if [ $(phantomjs --version) != $PHANTOMJS_VERSION ]; then tar -xvf $PWD/travis_phantomjs/phantomjs-$PHANTOMJS_VERSION-linux-x86_64.tar.bz2 -C $PWD/travis_phantomjs; fi"
  - "if [ $(phantomjs --version) != $PHANTOMJS_VERSION ]; then hash -r; fi"
  - "phantomjs --version"

script:
  - R -f run_tests.R