From 344c822ad352fdd973fe9d795144522ab095709a Mon Sep 17 00:00:00 2001
From: "Adam H. Sparks" <adamhsparks@gmail.com>
Date: Sat, 4 Nov 2017 16:23:45 +1000
Subject: [PATCH] update .travis.yml

Use @AndySouth 's version from _rnaturalearth_ to get _sf_ to install properly
---
 .travis.yml | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 756ad0fe..56e5ed6c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,37 @@
 # R for travis: see documentation at https://docs.travis-ci.com/user/languages/r
 
-language: R
-sudo: false
+# .travis.yml
+
+# from tigris
+
+# from Andy South (rnaturalearth's travis.yml to build sf)
+language: r
+warnings_are_errors: true
+sudo: required
 cache: packages
 
+matrix:
+    include:
+        - os: linux
+          r: release
+          dist: trusty # 14.04
+          env: R_CODECOV=true
+        - os: linux
+          r: devel
+          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 --yes udunits-bin libproj-dev libgeos-dev libgdal-dev libgdal1-dev libudunits2-dev
+
+notifications:
+  email:
+    on_success: change
+    on_failure: change
+
+r_github_packages:
+      - jimhester/covr
+
 after_success:
-  - Rscript -e 'covr::codecov()'
+      - Rscript -e 'covr::codecov()'