.travis.yml

# Use new container infrastructure to enable caching
sudo: false

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

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


# Ensure necessary system libraries are present
addons:
  apt:
    packages:
      - libgmp-dev

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'
- sudo mkdir -p /etc/nix
- echo "substituters = https://cache.nixos.org/ file://$HOME/nix.store" | sudo tee -a /etc/nix/nix.conf > /dev/null
- echo 'require-sigs = false' | sudo tee -a /etc/nix/nix.conf > /dev/null

before_cache:
- mkdir -p $HOME/nix.store
- nix copy --to file://$HOME/nix.store -f shell.nix --arg ghc "with (import <nixpkgs> {}); haskell.compiler.ghc822"  buildInputs

before_script:
  - echo 'sandbox = true' | sudo tee /etc/nix/nix.conf

install:
# Build dependencies
- stack --no-terminal --install-ghc test --only-dependencies

script:
# Build the package, its tests, and its docs and run the tests
- make