# This .travis.yml is modified from the sample at
# https://docs.haskellstack.org/en/stable/GUIDE/#travis-with-caching

# Use new container infrastructure to enable caching
sudo: false

# Do not choose a language; we provide our own build tools.
language: generic

# Caching so the next build will be fast too.
cache:
  directories:
  - $HOME/.ghc
  - $HOME/.cabal
  - $HOME/.stack

env:
  global:
    - GHC_OPTIONS="-O0 -Werror"

addons:
  apt:
    packages:
      - happy-1.19.5
    sources:
      - hvr-ghc

# The different configurations we want to test. We have BUILD=cabal which uses
# cabal-install, and BUILD=stack which uses Stack. More documentation on each
# of those below.
#
# We set the compiler values here to tell Travis to use a different
# cache file per set of arguments.
#
# fast_finish: build successful when every builds not in allow_failure are finished
# i.e. not waiting any of the allow_failure to finish
matrix:
  fast_finish: true

  include:
  # We grab the appropriate GHC and cabal-install versions from hvr's PPA. See:
  # https://github.com/hvr/multi-ghc-travis
  # don't build benchmarks for ghc 7.10.3, because build takes too long...
  - env: >-
      BUILD=cabal
      GHCVER=7.10.3
      CABALVER=2.0
      FLAGS="fast embed_data_files"
      CABALARGS=""
      TESTPATTERN="! /Round trip/"
    compiler: ": #GHC 7.10.3"

  # don't build benchmarks for ghc 8.0.2, because build takes too long...
  - env: >-
      BUILD=cabal
      GHCVER=8.0.2
      CABALVER=2.0
      FLAGS="fast"
      CABALARGS=""
      TESTPATTERN="! /Round trip/"
    compiler: ": #GHC 8.0.2"

  - env: >-
      BUILD=cabal
      GHCVER=8.2.2
      CABALVER=2.0
      FLAGS="fast embed_data_files"
      CABALARGS="--enable-benchmarks"
      TESTPATTERN="! /Round trip/"
    compiler: ": #GHC 8.2.2"

  - env: >-
      BUILD=cabal
      GHCVER=8.4.3
      CABALVER=2.2
      FLAGS="fast embed_data_files"
      CABALARGS="--enable-benchmarks"
      TESTPATTERN="! /Round trip/"
    compiler: ": #GHC 8.4.3"

  - env: >-
      BUILD=cabal
      GHCVER=8.6.1
      CABALVER=2.4
      FLAGS="fast embed_data_files"
      CABALARGS="--enable-benchmarks --allow-newer=haddock-library:base"
      TESTPATTERN="! /Round trip/"
    compiler: ": #GHC 8.6.1"

  # Build with the newest GHC and cabal-install. This is an accepted failure,
  # see below.
  # - env: BUILD=cabal GHCVER=head  CABALVER=head CABALAGS="--allow-newer"
  #   compiler: ": #GHC HEAD"
  #   addons: {apt: {packages: [cabal-install-head,ghc-head], sources: [hvr-ghc]}}

  # The Stack builds. We can pass in arbitrary Stack arguments via the ARGS
  # variable, such as using --stack-yaml to point to a different file.
  # - env: BUILD=stack ARGS="--stack-yaml stack.lts9.yaml" FLAGS="fast embed_data_files"
  #   compiler: ": #stack 8.0.2"
  #   addons: {apt: {packages: [ghc-8.0.2], sources: [hvr-ghc]}}

  - env: >-
      BUILD=stack
      ARGS="--resolver lts-12"
      GHCVER=8.4.3
      TESTPATTERN="! /Round trip/"
    compiler: ": #stack 8.4.3"

  # Nightly builds are allowed to fail
  - env: >-
      BUILD=stack
      ARGS="--resolver nightly"
      GHCVER=8.4.3
      TESTPATTERN="."
    compiler: ": #stack nightly"

  # - env: BUILD=stack ARGS="--resolver lts-8"
  #   compiler: ": #stack 8.0.2 osx"
  #   os: osx

  # - env: BUILD=stack ARGS="--resolver nightly"
  #   compiler: ": #stack nightly osx"
  #   os: osx

  allow_failures:
  - env: BUILD=cabal GHCVER=head  CABALVER=head
  - env: >-
      BUILD=stack
      ARGS="--resolver nightly"
      GHCVER=8.4.3
      TESTPATTERN="."

before_install:
# Using compiler above sets CC to an invalid value, so unset it
- unset CC
- sudo apt-get install ${GHCVER:+ghc-$GHCVER} ${CABALVER:+cabal-install-$CABALVER}
- export PATH=/opt/happy/1.19.5/bin/:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:/opt/cabal/bin:$HOME/.local/bin:$HOME/.cabal/bin:$PATH
# Download and unpack the stack executable
- |
  if [[ $BUILD == "stack" ]]; then
    mkdir -p ~/.local/bin
    if [ `uname` = "Darwin" ]
    then
      curl --insecure -L https://www.stackage.org/stack/osx-x86_64 |\
          tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin
    else
      curl -L https://www.stackage.org/stack/linux-x86_64 |\
          tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
    fi
  fi

install:
- echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
- if [ -f configure.ac ]; then autoreconf -i; fi
- |
  case "$BUILD" in
    stack)
      ulimit -n 4096
      stack config set system-ghc --global true
      stack --no-terminal --install-ghc $ARGS build --only-dependencies --fast \
            --flag 'pandoc:embed_data_files' --flag 'aeson:fast' --jobs 2
      ;;
    cabal)
      cabal --version
      travis_retry cabal update
      case "$GHCVER" in
        7.10.3)
           cabal install -v1 --disable-optimization --flags="$FLAGS" \
                 --enable-tests --force-reinstalls --reorder-goals   \
                 --max-backjumps=-1 $CABALARGS
           ;;
        *)
           cabal install --disable-optimization --only-dependencies \
                 --flags="$FLAGS" --enable-tests --force-reinstalls \
                 --reorder-goals --max-backjumps=-1 $CABALARGS .
           ;;
      esac
      ;;
  esac

script:
- |
  case "$BUILD" in
    stack)
      ulimit -n 4096
      stack config set system-ghc --global true
      stack --no-terminal $ARGS test --fast --flag 'aeson:fast' \
            --flag pandoc:embed_data_files --haddock --no-haddock-deps \
            --ghc-options="$GHC_OPTIONS" \
            --test-arguments="--hide-successes --pattern \"$TESTPATTERN\""
      ;;
    cabal)
      cabal sdist --output-directory=sourcedist && \
      cd sourcedist && \
      cabal configure --disable-optimization --enable-tests -v2 \
            --flags="$FLAGS" --ghc-options="$GHC_OPTIONS" $CABALARGS && \
      cabal build -v2 -j2 && \
      cabal test --test-options="--pattern=\"$TESTPATTERN\""
      ;;
  esac