language: haskell
ghc:
  - 7.4
  - 7.6
  - 7.8

sudo: false

addons:
  apt:
    packages:
    - zlib1g-dev

cache:
  apt: true
  directories:
  - ~/.cabal
  - ~/.ghc

before_cache:
  - rm -f $HOME/.cabal/logs $HOME/.cabal/packages/*/build-reports.log

install:
  - cabal update
#  - ( $CABAL122 && cabal install cabal-install --constraint "Cabal >= 1.22" && ghc-pkg unregister Cabal ) || true
  - echo $PATH
  - which cabal
  - if [ -n "$(cabal --version | grep 'Cabal library' | awk '{ print $3 }' | tail -n1 | sed -n '/^1.18/p')" ]; then cabal install cabal-install --constraint "Cabal == 1.18.* && > 1.18.0"; fi
  - cabal install happy
  - happy --version
#  - ls -lR ~/.ghc
#  - ls -lR ~/.cabal
  - cabal install -j --only-dependencies --enable-tests
  - git clone --depth=1 https://github.com/DanielG/cabal-helper.git
  - cabal install cabal-helper/


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 $WERROR
  - cabal build
  - export ghc_mod_datadir=$PWD
  - cabal test

matrix:
  allow_failures:
    - env: GHCVER=head