.travis.yml

# Here, we test with both stack and cabal. The reasons to test with cabal are
# twofold:
#
# 1. We want to ensure that the bootstrapping case works
#
# 2. Building with stack would be too easy a test, since it guarantees us a
# sane build environment. In CI, we want to make our life more difficult, so we
# use cabal without any Stackage snapshots.
#
language: generic
sudo: false

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

matrix:
  fast_finish: true
  include:
    - env: BUILD=cabal CABALVER=1.24 GHCVER=7.10.3
      compiler: ": #GHC 7.10.3"
      addons: {apt: {packages: [cabal-install-1.24,ghc-7.10.3], sources: [hvr-ghc]}}

    - env: BUILD=stack STACK_YAML=stack-7.10.yaml
      compiler: ": #stack 7.10.3"
      addons: {apt: {packages: [ghc-7.10.3], sources: [hvr-ghc]}}

    - env: BUILD=stack STACK_YAML=stack-7.10.yaml
      compiler: ": #stack 7.10.3 osx"
      os: osx

    - env: BUILD=cabal CABALVER=1.24 GHCVER=8.0.2
      compiler: ": #GHC 8.0.2"
      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.2], sources: [hvr-ghc]}}

    - env: BUILD=stack GHCVER=8.0.2 STACK_YAML=stack.yaml
      compiler: ": #stack 8.0.2"
      addons: {apt: {packages: [ghc-8.0.2], sources: [hvr-ghc]}}

    - env: BUILD=stack GHCVER=8.0.2 STACK_YAML=stack.yaml
      compiler: ": #stack 8.0.2 osx"
      os: osx

    - env: BUILD=style GHCVER=8.0.2 STACK_YAML=stack.yaml
      compiler: ": #stack 8.0.2"
      addons: {apt: {packages: [ghc-8.0.2], sources: [hvr-ghc]}}

  allow_failures:
    - env: BUILD=stack STACK_YAML=stack-7.10.yaml
      compiler: ": #stack 7.10.3 osx"
      os: osx

    - env: BUILD=stack GHCVER=8.0.2 STACK_YAML=stack.yaml
      compiler: ": #stack 8.0.2 osx"
      os: osx

# 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
 - case "$BUILD" in
     style)
       export PATH=$HOME/.local/bin:/opt/ghc/$GHCVER/bin:$PATH;;
     stack)
       export PATH=$HOME/.local/bin:/opt/ghc/$GHCVER/bin:$PATH;;
     cabal)
       export PATH=$HOME/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH;;
   esac
 - ./.travis-setup.sh

install:
 - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
 - case "$BUILD" in
     style)
       stack --system-ghc --no-terminal install hlint;;
     stack)
       stack --no-terminal test --only-dependencies;;
     cabal)
       cabal --version;
       travis_retry cabal update;
       rm -f $HOME/.cabal/bin/stack;
       echo "stack is located at $(which stack)";
       stack --version;
       rm -f $(stack --compiler=ghc-$GHCVER path --dist-dir)/stack-*.tar.gz &&
       stack --system-ghc --compiler=ghc-$GHCVER sdist --pvp-bounds=both &&
       tar xf $(stack --system-ghc --compiler=ghc-$GHCVER path --dist-dir)/stack-*.tar.gz --wildcards --strip-components=1 '*/stack.cabal' &&
       cabal install --only-dependencies --enable-tests --enable-benchmarks --force-reinstalls --ghc-options=-O0 --reorder-goals --max-backjumps=-1;;
   esac

script:
 - set -e; case "$BUILD" in
     style)
       hlint src/ --hint=HLint.hs;
       hlint src/ --cpp-define=WINDOWS=1 --hint=HLint.hs;
       hlint test/ --cpp-simple --hint=HLint.hs;
       stack --system-ghc --no-terminal build --pedantic;;
     stack)
       stack --no-terminal test --haddock --no-haddock-deps --ghc-options="-Werror";;
     cabal)
       cabal configure --enable-tests --enable-benchmarks -v2 --ghc-options="-O0 -Werror";
       cabal build;
       cabal test;
       cabal check;
       cabal sdist;
       cabal copy;
       cd test/integration;
       true stack setup --compiler=ghc-$GHCVER;
       true stack test --compiler=ghc-$GHCVER;
       cd ../..;
       SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz &&
       (cd dist && cabal install --force-reinstalls "$SRC_TGZ");;
   esac