# Largely copied from https://github.com/ekmett/lens

language: haskell

branches:
  except:
    - gh-pages

env:
 - GHCVER=7.4.2
 - GHCVER=7.6.3
 - GHCVER=7.8.4
 - GHCVER=7.10.1
 - GHCVER=head

matrix:
  allow_failures:
   - env: GHCVER=head

before_install:
  # If $GHCVER is the one travis has, don't bother reinstalling it.
  # We can also have faster builds by installing some libraries with
  # `apt`. If it isn't, install the GHC we want from hvr's PPA along
  # with cabal-1.18.
  - |
    if [ $GHCVER = `ghc --numeric-version` ]; then
      # Try installing some of the build-deps with apt-get for speed.
      travis/cabal-apt-install --enable-tests $MODE
      export CABAL=cabal
    else
      # Install the GHC we want from hvr's PPA
      travis_retry sudo add-apt-repository -y ppa:hvr/ghc
      travis_retry sudo apt-get update
      travis_retry sudo apt-get install cabal-install-1.22 ghc-$GHCVER happy
      export CABAL=cabal-1.22
      export PATH=/opt/ghc/$GHCVER/bin:$PATH
    fi
  # Uncomment whenever hackage is down.
  # - mkdir -p ~/.cabal && cp travis/config ~/.cabal/config && $CABAL update
  - $CABAL update

  # Update happy when building with GHC head
  - |
    if [ $GHCVER = "head" ] || [ $GHCVER = "7.8.3" ]; then
      $CABAL install happy alex
      export PATH=$HOME/.cabal/bin:$PATH
    fi

install:
  - $CABAL install --dependencies-only --enable-tests
  - $CABAL configure -flib-Werror --enable-tests $MODE

script:
 - $CABAL configure --enable-tests
 - $CABAL build

# Run tests
 - $CABAL test

# Check package for common errors
# (enable after stable release)
# - $CABAL check

# Test that a source distribution can be built and installed
# (enable after stable release)
# - $CABAL sdist
# - export SRC_TGZ=$($CABAL info . | awk '{print $2 ".tar.gz";exit}') ;
#   cd dist/;
#   if [ -f "$SRC_TGZ" ]; then
#      $CABAL install --force-reinstalls "$SRC_TGZ";
#   else
#      echo "expected '$SRC_TGZ' not found";
#      exit 1;
#   fi