.travis.yml

# Travis configuration guide for R language:
#   https://docs.travis-ci.com/user/languages/r/
#   https://github.com/craigcitro/r-travis/wiki/Porting-to-native-R-support-in-Travis

language: r

r:
  - oldrel
  - release
  - devel

sudo: required
cache: packages

# use Trusty archive for package installation
dist: trusty

# If needed mention newer/different versions of packages other than those on Trusty archive.
# Try to fix errors related to:
# - udunits2, ref https://stackoverflow.com/a/42387825/5193830
# - "gdal-config not found or not executable", ref https://stackoverflow.com/a/12143411/5193830
# - SCL: Attempting to use sf package's travis.yml as template:
# https://github.com/travis-ci/travis-ci/issues/5852 and
# https://github.com/r-spatial/sf/blob/master/.travis.yml

before_install:
  - sudo apt-get -qq update
  - sudo apt-get install --yes libudunits2-dev
  - sudo apt-get install --yes libproj-dev libgeos-dev libgdal-dev

# Turn off email notifications entirely
notifications:
  email: false