.travis.yml

# language `ghc` drags in old ghc versions
# language `generic` drags in too many others deps
# language `c` is lighter weight, and is fine since we declare most of our own deps
language: c

# https://docs.travis-ci.com/user/reference/overview/#Virtualisation-Environment-vs-Operating-System
sudo: required
dist: trusty

# this will attempt to cache the contents of the specified directories between
# runs to speed up install times
cache:
    directories:
        - $HOME/.cabal
        - $HOME/.ghc

# clean up anything we don't want to cache
# log and index files aren't worth caching
# Note: this should be safe as cabal should still do an install
#       if a newer version of a dependency is available
before_cache:
    - rm -f $HOME/.cabal/logs/*.log
    - rm -f $HOME/.cabal/packages/00-index*
    - rm -f $HOME/.cabal/packages/01-index*
    - rm -f $HOME/.cabal/packages/build-reports.log

# using ghc and cabal-install from
#   https://launchpad.net/~hvr/+archive/ubuntu/ghc
# llvm from
#   http://apt.llvm.org
addons:
  apt:
    sources: &apt_sources
      - hvr-ghc
      - ubuntu-toolchain-r-test
      - llvm-toolchain-trusty
      - llvm-toolchain-trusty-5.0
      - llvm-toolchain-trusty-6.0

    packages: &apt_packages
      - cabal-install-2.4

compiler:
  - GHC-8.6.3
  - GHC-8.4.4

env:
  global:
    - CABAL=2.4
  matrix:
    - LLVM=6.0.0
    - LLVM=5.0.1

# Install GHC and LLVM. We could do this via the build matrix configuration
# without requiring sudo, but this method is easier to set up a cartesean
# product of 'compiler x matrix' build configurations.
before_install:
    - export GHC=${CC:4}
    - unset CC
    - sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install ghc-${GHC} llvm-${LLVM:0:3}-dev

    # put ghc and cabal on the path
    - export PATH=/opt/ghc/${GHC}/bin:/opt/cabal/${CABAL}/bin:$PATH
    - cabal update

    # sanity check
    - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
    - cabal --version
    - llc-${LLVM:0:3} --version; true
    - opt-${LLVM:0:3} --version; true

# install necessary library dependencies
install:
    - make setup

script:
    - make clean
    - make
    - make war

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