.travis.yml

# from https://github.com/hvr/multi-ghc-travis
# NB: don't set `language: haskell` here

# The following enables several GHC versions to be tested; often it's enough to test only against the last release in a major GHC version. Feel free to omit lines listings versions you don't need/want testing for.
env:
 - CABALVER=1.22 GHCVER=7.10.1
 - CABALVER=1.22 GHCVER=7.10.2
 - CABALVER=1.22 GHCVER=7.10.3

# Note: the distinction between `before_install` and `install` is not important.
before_install:
 - travis_retry sudo add-apt-repository -y ppa:hvr/ghc
 - travis_retry sudo apt-get update
 - travis_retry sudo apt-get install cabal-install-$CABALVER ghc-$GHCVER # see note about happy/alex
 - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH

install:
 - cabal --version
 - ghc --version
 - travis_retry cabal update
# get the HEAD version of units always
 - git clone https://github.com/goldfirere/units.git
 - cd units; cabal install; cd ..
 - cabal install --only-dependencies --enable-tests --enable-benchmarks

# Here starts the actual work to be performed for the package under test; any command which exits with a non-zero exit code causes the build to fail.
script:
 - cabal configure --enable-tests --enable-benchmarks -v2 --ghc-options=-Werror
 - cabal build   # this builds all libraries and executables (including tests/benchmarks)
# - cabal test            # no testsuite, hence commented out
 - cabal check
 - cabal sdist   # tests that a source-distribution can be generated

# The following scriptlet checks that the resulting source distribution can be built & installed
 - export SRC_TGZ=$(cabal-$CABALVER info . | awk '{print $2 ".tar.gz";exit}') ;
   cd dist/;
   if [ -f "$SRC_TGZ" ]; then
      cabal install "$SRC_TGZ";
   else
      echo "expected '$SRC_TGZ' not found";
      exit 1;
   fi

after_script:
 - cat dist/test/*.log