name: CI

# Trigger the workflow on push or pull request, but only for the main branch
on:
  pull_request:
  push:
    branches: [master]

jobs:
  cabal:
    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest]
        cabal: ["3.2"]
        ghc:
          - "8.8.4"
          - "8.10.2"
        # exclude:
        #   - os: macOS-latest
        #     ghc: 8.8.4
        #   - os: macOS-latest
        #     ghc: 8.6.5
        #   - os: windows-latest
        #     ghc: 8.10.2
        #   - os: windows-latest
        #     ghc: 8.6.5

    steps:
    - uses: actions/checkout@v2

    - uses: actions/setup-haskell@v1.1.4
      id: setup-haskell-cabal
      name: Setup Haskell
      with:
        ghc-version: ${{ matrix.ghc }}
        cabal-version: ${{ matrix.cabal }}

    - name: Configure
      run: |
        cabal configure --enable-tests --enable-benchmarks --test-show-details=direct
        cabal install --ignore-project -j2 doctest --constraint='doctest ^>=0.17'

    - name: Freeze
      run: |
        cabal freeze

    - uses: actions/cache@v2.1.3
      name: Cache ~/.cabal/store
      with:
        path: ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
        key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}

    - name: Build
      run: |
        cabal build all

    - name: Test
      run: |
        cabal test all

    - name: Run doctests
      run: |
        # Necessary for doctest to be found in $PATH
        export PATH="$HOME/.cabal/bin:$PATH"

        # Filter out base-compat-batteries from .ghc.environment.*, as its modules
        # conflict with those of base-compat.
        #
        # FIXME: This is an ugly hack. Ultimately, we'll want to use cabal-doctest
        # (or cabal v2-doctest, if it ever lands) to provide a clean GHC environment.
        # This might allow running doctests in GHCJS build as well.
        perl -i -e 'while (<ARGV>) { print unless /package-id\s+(base-compat-batteries)-\d+(\.\d+)*/; }' .ghc.environment.*

        (cd servant && doctest src)
        (cd servant-client && doctest src)
        (cd servant-client-core && doctest src)
        (cd servant-http-streams && doctest src)
        (cd servant-docs && doctest src)
        (cd servant-foreign && doctest src)
        (cd servant-server && doctest src)
        (cd servant-machines && doctest src)
        (cd servant-conduit && doctest src)
        (cd servant-pipes && doctest src)

  stack:
    name: stack / ghc ${{ matrix.ghc }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        stack: ["2.3.1"]
        ghc: ["8.8.4"]

    steps:
    - uses: actions/checkout@v2

    - uses: actions/setup-haskell@v1.1.4
      name: Setup Haskell Stack
      with:
        ghc-version: ${{ matrix.ghc }}
        stack-version: ${{ matrix.stack }}

    - uses: actions/cache@v2.1.3
      name: Cache ~/.stack
      with:
        path: ~/.stack
        key: ${{ runner.os }}-${{ matrix.ghc }}-stack

    - name: Install dependencies
      run: |
        stack build --system-ghc --test --bench --no-run-tests --no-run-benchmarks --only-dependencies

    - name: Build
      run: |
        stack build --system-ghc --test --bench --no-run-tests --no-run-benchmarks

    - name: Test
      run: |
        stack test --system-ghc