.travis.yml

# Use a lightweight base image; we provide our own build tools.
language: c

# Docker builds make GHC much slower for some reason:
# https://github.com/travis-ci/travis-ci/issues/5623
sudo: true

cache:
  timeout: 600 # 10 minutes
  directories:
  - $HOME/.ghc
  - $HOME/.stack
  - $HOME/.cabal

matrix:
  include:
  - env: BUILD=cabal GHCVER=8.4.4 CABALVER=2.2
    addons: {apt: {packages: [cabal-install-2.2, ghc-8.4.4], sources: [hvr-ghc]}}
  - env: BUILD=cabal GHCVER=8.6.5 CABALVER=2.4
    addons: {apt: {packages: [cabal-install-2.4, ghc-8.6.5], sources: [hvr-ghc]}}
  # TODO: switch everything to cabal new-build
  - env: BUILD=cabal-new GHCVER=8.6.5 CABALVER=2.4
    addons: {apt: {packages: [cabal-install-2.4, ghc-8.6.5], sources: [hvr-ghc]}}
  - env: BUILD=stack STACK='stack --resolver=lts-12.26'
    addons: {apt: {packages: [libgmp-dev]}}
  - env: BUILD=stack STACK='stack'  # Use the resolver in stack.yaml
    addons: {apt: {packages: [libgmp-dev]}}
  - env: BUILD=stack STACK='stack --stack-yaml=stack-8.8.yaml'
    addons: {apt: {packages: [libgmp-dev]}}
  - env: BUILD=stack STACK='stack --stack-yaml=stack-8.10.yaml'
    addons: {apt: {packages: [libgmp-dev]}}

before_install:
  - mkdir -p $HOME/.local/bin
  - case "$BUILD" in
      stack)
        export PATH=/opt/ghc/$GHCVER/bin:$HOME/.local/bin:$PATH;;
      cabal)
        export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$HOME/.local/bin:$HOME/.cabal/bin:$PATH;;
      cabal-new)
        export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:$HOME/.local/bin:$HOME/.cabal/bin:$PATH;;
    esac
  - curl -L https://github.com/commercialhaskell/stack/releases/download/v2.3.1/stack-2.3.1-linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C $HOME/.local/bin '*/stack'
  - curl -L https://github.com/protocolbuffers/protobuf/releases/download/v3.7.1/protoc-3.7.1-linux-x86_64.zip > protoc-release.zip
  - unzip -p protoc-release.zip bin/protoc > $HOME/.local/bin/protoc
  - chmod a+x $HOME/.local/bin/protoc
  - rm protoc-release.zip

install:
  - case "$BUILD" in
      stack)
        $STACK setup --no-terminal;
        $STACK build --no-terminal happy;
        $STACK build --only-dependencies --no-terminal;;
      cabal)
        cabal update;;
    esac

script:
  # Separate stack's build and test commands, since build by itself hits some
  # edge cases around custom Setup.hs script dependencies.
  # Also build the tutorial, with proto-lens-* as extra-deps.  Note that
  # since stack is not hermetic, the extra-deps for the tutorial reuse some
  # build outputs from the regular build.
  - case "$BUILD" in
      stack)
        STACK_ARGS=(--haddock --no-haddock-deps);
        $STACK build --bench --no-run-benchmarks "${STACK_ARGS[@]}" && $STACK test "${STACK_ARGS[@]}" &&
        (cd proto-lens-tutorial && $STACK build "${STACK_ARGS[@]}");;
      cabal)
        ./travis-cabal.sh;;
      cabal-new)
        ./travis-cabal-new.sh;;
    esac