language: haskell
ghc:
  - 7.4
  - 7.6
  - 7.8

sudo: false

addons:
  apt:
    packages:
    - zlib1g-dev

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

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

before_install:
  - wget https://github.com/commercialhaskell/stack/releases/download/v0.1.3.1/stack-0.1.3.1-x86_64-linux.gz
  - mkdir stack-bin
  - gunzip stack-0.1.3.1-x86_64-linux.gz
  - mv stack-0.1.3.1-x86_64-linux stack-bin/stack
  - chmod +x stack-bin/stack
  - export PATH=$(pwd)/stack-bin:$PATH
  - stack --version

install:
  - export CABAL_VER="$(ghc-pkg describe ghc | sed -n '/^depends:/,/^[a-z]/p' | head -n-1 | sed '1{s/^depends://}' | grep " *Cabal" | tr -d "[:space:]" | sed 's/^Cabal-\([0-9.]*\)-.*/\1/g')"
  - echo $CABAL_VER
  - cabal update
  - cabal install happy
  - happy --version
  - git clone --depth=1 https://github.com/DanielG/cabal-helper.git
  - cabal install cabal-helper/ --constraint "Cabal == ${CABAL_VER}"
  - 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 $WERROR
  - cabal build
  - export ghc_mod_datadir=$PWD
  - cabal test

matrix:
  allow_failures:
    - env: GHCVER=head