.travis.yml

language: c
sudo: false
dist: bionic

git:
  submodules: false  # whether to recursively clone submodules

cache:
  directories:
    - $HOME/.cabal/packages
    - $HOME/.cabal/store

before_cache:
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log
  # remove files that are regenerated by 'cabal update'
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.*
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/*.json
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.cache
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar
  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar.idx

matrix:
  include:
    - env: CABALVER=2.2 GHCVER=8.8.4
      compiler: "ghc-8.8.4"
      addons: {apt: {packages: [cabal-install-2.2,ghc-8.8.4,happy-1.19.5], sources: [hvr-ghc]}}
    - env: CABALVER=2.2 GHCVER=8.6.5
      compiler: "ghc-8.6.5"
      addons: {apt: {packages: [cabal-install-2.2,ghc-8.6.5,happy-1.19.5], sources: [hvr-ghc]}}

before_install:
 - unset CC
 - export HAPPYVER=1.19.5
 - export PATH=~/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:/opt/happy/$HAPPYVER/bin:$PATH

install:
 - cabal --version
 - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
 - travis_retry cabal update -v
 - sed -i 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
 - rm -fv cabal.project.local
 - rm -f cabal.project.freeze
 - cabal install --only-dependencies --enable-tests -v2

# Here starts the actual work to be performed for the package under test;
# any command which exits with a non-zero exit code causes the build to fail.
script:
 - rm -rf dist/
 # build tests and benchmarks, run tests
 - cabal configure --enable-tests --enable-benchmarks -v2
 - cabal build
 - cabal test
 - cabal check
 - cabal sdist