.travis.yml

language: generic
sudo: false

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


before_install:
  # Download and unpack the stack executable
  - mkdir -p ~/.local/bin
  - export PATH=$HOME/.local/bin:$PATH
  - travis_retry curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'

matrix:
  include:
  - env: BUILD=stack GHCVER=8.0.1 STACK_YAML=stack-8.0.1.yaml
    compiler: ": #stack 8.0.1"
    addons:
      apt:
        sources:
        - hvr-ghc
        packages:
        - ghc-8.0.1
  - env: BUILD=stack GHCVER=8.4.3 STACK_YAML=stack.yaml
    compiler: ": #stack 8.4.3"
    addons:
      apt:
        sources:
        - hvr-ghc
        packages:
        - ghc-8.4.3
  - env: LINT=hlint

script:
  - |
    set -ex
    if [[ $LINT == 'hlint' ]]; then 
      curl -sL https://raw.github.com/ndmitchell/hlint/master/misc/travis.sh | sh -s . 
    else
      stack setup
      stack --no-terminal test
    fi
    set +ex