# 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:
 - GHCVER=7.4.2 CABALVER=1.16
 - GHCVER=7.6.3 CABALVER=1.18
 - GHCVER=head  # see section about GHC HEAD snapshots

before_install:
 - sudo add-apt-repository -y ppa:hvr/ghc
 - sudo apt-get update
 - sudo apt-get install cabal-install-$CABALVER ghc-$GHCVER happy hlint
 - export PATH=/opt/ghc/$GHCVER/bin:$PATH

install:
 - cabal-$CABALVER update
 - cabal-$CABALVER install --only-dependencies --enable-tests --enable-benchmarks -j

script:
 - cabal-$CABALVER configure --enable-tests --enable-benchmarks -v2 --ghc-options="-Wall -Werror"
 - cabal-$CABALVER build 
 - cabal-$CABALVER test
 - cabal-$CABALVER check
 - hlint src 
 - cabal-$CABALVER 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-$CABALVER install "$SRC_TGZ";
   else
      echo "expected '$SRC_TGZ' not found";
      exit 1;
   fi

matrix:
  allow_failures:
   - env: GHCVER=head