language: haskell
ghc:
  - 7.4
  - 7.6
  - 7.8

install:
  - sudo apt-get install zlib1g-dev
  - cabal update
#  - ( $CABAL122 && cabal install cabal-install --constraint "Cabal >= 1.22" && ghc-pkg unregister Cabal ) || true
  - echo $PATH
  - which cabal
  - cabal install cabal-install --constraint "Cabal == $(cabal --version | grep 'Cabal library' | awk '{ print $3 }' | awk -vFS=. '{ print $1 "." $2 }' | tail -n1).*"
#  - cabal install Cabal --constraint "Cabal == $(cabal --version | grep 'Cabal library' | awk '{ print $3 }' | tail -n1)"
  - happy --version
  - cabal install -j --only-dependencies --enable-tests

script:
  - touch ChangeLog # Create ChangeLog if we're not on the release branch
  - cabal check
  - cabal sdist
  - export SRC_TGZ="$PWD/dist/$(cabal info . | awk '{print $2 ".tar.gz";exit}')"
  - rm -rf /tmp/test && mkdir -p /tmp/test
  - cd /tmp/test
  - tar -xf $SRC_TGZ && cd ghc-mod*/
  - if [ -n "$(ghc --version | awk '{ print $8 }' | sed -n '/^7.8/p')" ]; then export WERROR="--ghc-option=-Werror"; fi
  - cabal configure --enable-tests $WERROR
  - cabal build
  - export ghc_mod_libexecdir=$PWD/dist/build/cabal-helper-wrapper
  - export ghc_mod_datadir=$PWD
  - cabal test

matrix:
  allow_failures:
    - env: GHCVER=head