.travis.yml

# 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:
# - GHCVER=6.12.3
 - GHCVER=7.4.2
 - GHCVER=7.6.3
 - GHCVER=7.8.3 # see note about Alex/Happy
# - GHCVER=head  # see section about GHC HEAD snapshots

# 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-1.18 ghc-$GHCVER
 - export PATH=/opt/ghc/$GHCVER/bin:$PATH

install:
 - cabal-1.18 update
 - cabal-1.18 install --only-dependencies --enable-tests -fexecutable

# 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-1.18 configure -fexecutable --enable-tests -v2  # -v2 provides useful information for debugging
 - cabal-1.18 build --ghc-options=-Werror  # this builds all libraries and executables (including tests/benchmarks)
 - cabal-1.18 test
 - cabal-1.18 check