# 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:
    - env: CABALVER=1.22 GHCVER=7.10.3
      compiler: ": #GHC 7.10.2"
      addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.3,alex-3.1.7,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,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}
    - env: CABALVER=head GHCVER=head
      compiler: ": #GHC head"
      addons: {apt: {packages: [cabal-install-head,ghc-head,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}

  allow_failures:
   - env: CABALVER=head GHCVER=head

before_install:
  - unset CC
  - export HAPPYVER=1.19.5
  - export ALEXVER=3.1.7
  - export PATH=~/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:/opt/happy/$HAPPYVER/bin:/opt/alex/$ALEXVER/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 >
           $HOME/.cabal/packages/hackage.haskell.org/00-index.tar;
    fi
  - travis_retry cabal update
  - "sed -i  's/^jobs:.*$/jobs: 2/' $HOME/.cabal/config"
  - cabal install --only-dependencies --enable-tests --dry -v pipes-cacophony.cabal > 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 installplan.txt $HOME/.cabsnap/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 $HOME/.cabal/bin;
      cabal install --only-dependencies --enable-tests pipes-cacophony.cabal;
      if [ "$GHCVER" = "7.10.1" ]; then cabal install Cabal-1.22.4.0; fi;
    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

script:
  - cabal configure --enable-tests -v2  # -v2 provides useful information for debugging
  - cabal build   # this builds all libraries and executables (including tests)
  - cabal test
  - 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`
  - SRC_TGZ=$(cabal info . | awk '{print $2;exit}').tar.gz &&
    (cd dist && cabal install --enable-tests -fbuild-examples --run-tests --force-reinstalls "$SRC_TGZ")