language: ruby
sudo: false
dist: trusty

addons:
  apt:
    packages:
      - texlive-fonts-recommended
      - texlive-latex-extra
      - texlive-latex-recommended
      - dvipng

before_install:
  - |-
    RUBY_VER=`ruby -e "print RUBY_VERSION"`
    if [ "$RUBY_VER" = "2.1.10" ]; then
      gem install bundler -v '< 2'
    elif [ "$RUBY_VER" = "2.2.10" ]; then
      gem install bundler -v '< 2'
    else
      gem update --system
      gem install bundler
    fi

rvm:
  - 2.1
  - 2.2.10
  - 2.3.8
  - 2.4.5
  - 2.5.3
  - 2.6.0
##  - ruby-head

branches:
  only:
    - master