.travis.yml

language: c
sudo: false

cache:
    directories:
        - $HOME/.ghc
        - $HOME/.cabal

matrix:
  include:
    - env: BUILD=cabal CABALVER=1.18 GHCVER=7.8.4
      compiler: ": #GHC 7.8.4"
      addons: {apt: {packages: [happy-1.19.5,cabal-install-1.18,ghc-7.8.4], sources: [hvr-ghc]}}

    - env: BUILD=cabal CABALVER=1.22 GHCVER=7.10.1
      compiler: ": #GHC 7.10.1"
      addons: {apt: {packages: [happy-1.19.5,cabal-install-1.22,ghc-7.10.1], sources: [hvr-ghc]}}

    - env: BUILD=cabal CABALVER=1.22 GHCVER=7.10.2
      compiler: ": #GHC 7.10.2"
      addons: {apt: {packages: [happy-1.19.5,cabal-install-1.22,ghc-7.10.2], sources: [hvr-ghc]}}

    - env: BUILD=cabal CABALVER=1.22 GHCVER=7.10.3
      compiler: ": #GHC 7.10.3"
      addons: {apt: {packages: [happy-1.19.5,cabal-install-1.22,ghc-7.10.3], sources: [hvr-ghc]}}

    - env: BUILD=cabal CABALVER=1.24 GHCVER=8.0.1
      compiler: ": #GHC 8.0.1"
      addons: {apt: {packages: [happy-1.19.5,cabal-install-1.24,ghc-8.0.1], sources: [hvr-ghc]}}

    - env: BUILD=cabal CABALVER=head GHCVER=head
      compiler: ": #GHC head"
      addons: {apt: {packages: [happy-1.19.5,cabal-install-head,ghc-head], sources: [hvr-ghc]}}

  allow_failures:
    - env: BUILD=cabal CABALVER=head GHCVER=head

# Note: the distinction between `before_install` and `install` is not important.
# - in before_install we install build tools
# - in install we install (haskell) dependencies
before_install:
  - unset CC
  - export HAPPYVER=1.19.5
  - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:/opt/happy/$HAPPYVER/bin:$PATH

install:
  - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
  - cabal --version
  - ghc --version
  - travis_retry cabal update

script:
 - cabal install --only-dependencies --enable-tests
 - cabal configure -v2
 - cabal build
 - cabal check || [ "$CABALVER" == "1.16" ]
 - cabal sdist
 - export SRC_TGZ=$(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