Also travis test on OSX

.travis-build.sh

@@ -23,8 +23,8 @@ travis_fold end Building
 travis_fold start Checking
  bootstrap_header 'Checking package' 
  export PKG_TARBALL=$(Rscript -e "with(as.list(read.dcf('DESCRIPTION')[1, ]), cat(sprintf('%s_%s.tar.gz', Package, Version)))")
- R CMD check $PKG_TARBALL # could also use --as-cran
  export CHECK_LOG=/home/travis/build/IRkernel/IRkernel/IRkernel.Rcheck/00check.log
+ R CMD check $PKG_TARBALL # could also use --as-cran
 travis_fold end Checking
 
 travis_fold start Installing

.travis.yml

@@ -1,3 +1,7 @@
+os:
+  - linux
+  - osx
+
 language: r
 sudo: false
 cache: packages
@@ -25,3 +29,8 @@ script:
   # TODO: currently we do have 1 NOTE: Found the following assignments to the global environment...
   #- grep -q -R 'NOTE' "$CHECK_LOG"; [ $? -ne 0 ]
 
+after_failure:
+  - travis_fold start check_log
+  - bootstrap_header 'Check log'
+  - cat "$CHECK_LOG"
+  - travis_fold end check_log