language: r
sudo: true
cache: packages
pandoc_version: 2.3.1
dist: trusty

before_install:
  - sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable --yes
  - sudo apt-get --yes --force-yes update -qq
  - sudo apt-get install -y libudunits2-dev libproj-dev libgeos++-dev libgdal-dev libv8-dev

compiler:
  - clang