# Set-up
sudo: false

language: c

# If something is tagged, it's come from a PR which has been merged
# into master.  There's no need to build both the tag and the merge
# commit.
if: tag IS blank

# Cache builds
cache:
  directories:
  - $HOME/.ghc
  - $HOME/.cabal
  - $HOME/.stack

# Goal: support latest 3 GHC major versions.
matrix:
  fast_finish: true
  include:
  - env: MODE=test RESOLVER=lts-9.0 # GHC 8.0
    addons: {apt: {packages: [libgmp-dev]}}
  - env: MODE=test RESOLVER=lts-10.0 # GHC 8.2
    addons: {apt: {packages: [libgmp-dev]}}
  - env: MODE=test RESOLVER=nightly-2018-03-23 # GHC 8.4
    addons: {apt: {packages: [libgmp-dev]}}
  - env: MODE=test RESOLVER=nightly
    addons: {apt: {packages: [libgmp-dev]}}
  - env: MODE=doctest
    addons: {apt: {packages: [libgmp-dev]}}
  - env: MODE=style
    addons: {apt: {packages: [libgmp-dev]}}
  allow_failures:
  - env: MODE=test RESOLVER=nightly

# Download and unpack the stack executable
before_install:
- export PATH=/opt/ghc/$GHCVER/bin:$HOME/.local/bin:$PATH
- mkdir -p ~/.local/bin
- curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
- if [[ ! -z "$RESOLVER" ]]; then if [[ -e ".travis/$RESOLVER.yaml" ]]; then mv .travis/$RESOLVER.yaml stack.yaml; else stack init --resolver=$RESOLVER --force; fi; fi
- stack --no-terminal setup
- if [[ "$MODE" == "style" ]]; then stack --no-terminal install stylish-haskell; fi
- if [[ "$MODE" == "doctest" ]]; then stack --no-terminal install doctest; fi

# Run tests
script:
- stack --no-terminal build concurrency
- stack --no-terminal build dejafu
- stack --no-terminal build hunit-dejafu
- stack --no-terminal build tasty-dejafu
- stack --no-terminal build dejafu-tests

- |
  echo -en 'travis_fold:start:script.test\\r'
  set -ex
  case "$MODE" in
    style)
      curl -sL https://raw.github.com/ndmitchell/weeder/master/misc/travis.sh | sh -s .
      curl -sL https://raw.github.com/ndmitchell/hlint/master/misc/travis.sh  | sh -s .
      stack exec ./style.sh
      git diff --exit-code
      ;;
    test)
      cd dejafu-tests
      stack exec -- dejafu-tests +RTS -s
      ;;
    doctest)
      stack exec -- bash -c "DEJAFU_DOCTEST=y doctest dejafu/Test"
      ;;
  esac
  set +ex
  echo -en 'travis_fold:end:script.test\\r'