# This file has been generated -- see https://github.com/hvr/multi-ghc-travis
language: c
sudo: false

cache:
  directories:
    - $HOME/.cabsnap
    - $HOME/.cabal/packages

before_cache:
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.tar

matrix:
  include:
    # crashes in travis because 2 versions of unix get installed and
    # when text-show tries to use TH the wrong one gets linked
    # - env: CABALVER=1.24 GHCVER=7.10.3 HAPPYVER=1.19.5 BUILD=cabal
    #   compiler: ": #GHC 7.10.3"
    #   addons: {apt: {packages: [cabal-install-1.24,ghc-7.10.3,happy-1.19.5], sources: [hvr-ghc]}}
    - env: CABALVER=1.24 GHCVER=8.0.2
      compiler: ": #GHC 8.0.2"
      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.2,happy-1.19.5], sources: [hvr-ghc]}}
    - env: CABALVER=2.0 GHCVER=8.2.1
      compiler: ": #GHC 8.2.1"
      addons: {apt: {packages: [cabal-install-2.0,ghc-8.2.1,happy-1.19.5], sources: [hvr-ghc]}}

before_install:
 - unset CC
 - export HAPPYVER=1.19.5
 - export PATH=$HOME/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$PATH
 - export PATH=/opt/happy/$HAPPYVER/bin:$PATH

install:
 - cabal --version
 - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
 - if [ -f $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz ];
   then
     zcat $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz >
          $HOME/.cabal/packages/hackage.haskell.org/00-index.tar;
   fi
 - travis_retry cabal update -v
 - sed -i 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
 - cabal install --only-dependencies --enable-tests --enable-benchmarks --dry -v > installplan.txt
 - sed -i -e '1,/^Resolving /d' installplan.txt; cat installplan.txt

# check whether current requested install-plan matches cached package-db snapshot
 - if diff -u $HOME/.cabsnap/installplan.txt installplan.txt;
   then
     echo "cabal build-cache HIT";
     rm -rfv .ghc;
     cp -a $HOME/.cabsnap/ghc $HOME/.ghc;
     cp -a $HOME/.cabsnap/lib $HOME/.cabsnap/share $HOME/.cabsnap/bin $HOME/.cabal/;
   else
     echo "cabal build-cache MISS";
     rm -rf $HOME/.cabsnap;
     mkdir -p $HOME/.ghc $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin;
     cabal install -j1 --only-dependencies --enable-tests --enable-benchmarks;
   fi

# snapshot package-db on cache miss
 - if [ ! -d $HOME/.cabsnap ];
   then
      echo "snapshotting package-db to build-cache";
      mkdir $HOME/.cabsnap;
      cp -a $HOME/.ghc $HOME/.cabsnap/ghc;
      cp -a $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin installplan.txt $HOME/.cabsnap/;
   fi

# Here starts the actual work to be performed for the package under test;
# any command which exits with a non-zero exit code causes the build to fail.
script:
 - if [ -f configure.ac ]; then autoreconf -i; fi
 - cabal configure --enable-tests -v2  # -v2 provides useful information for debugging
 - cabal build -j1 # this builds all libraries and executables (including tests/benchmarks)
 - cabal test -j1 --show-details=always
 - cabal check
 - cabal sdist   # tests that a source-distribution can be generated

# Check that the resulting source distribution can be built & installed.
# If there are no other `.tar.gz` files in `dist`, this can be even simpler:
# `cabal install --force-reinstalls dist/*-*.tar.gz`

# Building it again doubles the time and it's currently timing out on Travis.
# It's also not that useful at the moment.
#- SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz &&
#   (cd dist && cabal install --force-reinstalls "$SRC_TGZ")

# EOF