.travis.yml

# NB: don't set `language: haskell` here

# Ensures that sudo is disabled, so that containerized builds are allowed
sudo: false

# 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.
matrix:
 include:
  - env: CABALVER=1.18 GHCVER=7.8.4 GHCOPTS="" JOPTS="-j2"
    addons: {apt: {packages: [cabal-install-1.18, ghc-7.8.4], sources: [hvr-ghc]}}
  - env: CABALVER=1.22 GHCVER=7.10.1 GHCOPTS="" JOPTS="-j2"
    addons: {apt: {packages: [cabal-install-1.22, ghc-7.10.1],sources: [hvr-ghc]}}

# Note: the distinction between `before_install` and `install` is not important.
before_install:
 - export PATH=/opt/ghc/$GHCVER/bin:$HOME/.cabal/bin:$PATH

install:
 - cabal-$CABALVER update
 - cabal-$CABALVER install alex happy
 - cabal-$CABALVER install $JOPTS --only-dependencies -fplugins

# 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-$CABALVER configure -fplugins -v2  # -v2 provides useful information for debugging
 - cabal-$CABALVER build $JOPTS --ghc-options=$GHCOPTS # this builds all libraries and executables (including tests/benchmarks)
 - cabal-$CABALVER check