name: CI tests

on:
  push:
    branches:
    - '*'
    - '!rc/*'
    paths-ignore:
    - 'doc/**'
    - 'MANUAL.txt'
    - '*.md'
    - 'RELEASE_CHECKLIST'
    - 'BUGS'
    - 'changelog'
    - 'README.template'
    - 'appveyor.yml'
    - 'tools/**'
    - 'linux/**'
    - 'macos/**'
    - 'windows/**'
    - 'man/**'
  pull_request:
    paths-ignore:
    - 'doc/**'
    - 'MANUAL.txt'
    - '*.md'
    - 'RELEASE_CHECKLIST'
    - 'BUGS'
    - 'changelog'
    - 'README.template'
    - 'appveyor.yml'
    - 'tools/**'
    - 'linux/**'
    - 'macos/**'
    - 'windows/**'
    - 'man/**'

jobs:
  linux:

    runs-on: ubuntu-18.04
    strategy:
      fail-fast: true
      matrix:
        versions:
          - ghc: '8.0.2'
            cabal: '2.4'
          - ghc: '8.2.2'
            cabal: '2.4'
          - ghc: '8.4.4'
            cabal: '2.4'
          - ghc: '8.6.5'
            cabal: '3.2'
          - ghc: '8.8.3'
            cabal: '3.2'
          - ghc: '8.10.1'
            cabal: '3.2'
    steps:
    - uses: actions/checkout@v1

    # need to install older cabal/ghc versions from ppa repository

    - name: Install recent cabal/ghc
      run: |
         if [[ ! -d /opt/ghc/${{ matrix.versions.ghc }} ]]
         then
           sudo add-apt-repository ppa:hvr/ghc
           sudo apt-get update
           sudo apt-get install ghc-${{ matrix.versions.ghc }} cabal-install-${{ matrix.versions.cabal }}
         fi
         # Use a GitHub workflow command to add folders to PATH.
         echo "::add-path::/opt/ghc/${{ matrix.versions.ghc }}/bin"
         echo "::add-path::/opt/cabal/${{ matrix.versions.cabal }}/bin"

    # declare/restore cached things
    # caching doesn't work for scheduled runs yet
    # https://github.com/actions/cache/issues/63

    - name: Cache cabal global package db
      id:   cabal-global
      uses: actions/cache@v1
      with:
        path: ~/.cabal
        key: ${{ runner.os }}-${{ matrix.versions.ghc }}-${{ matrix.versions.cabal }}-cabal-global-${{ hashFiles('cabal.project') }}

    - name: Cache cabal work
      id:   cabal-local
      uses: actions/cache@v1
      with:
        path: dist-newstyle
        key: ${{ runner.os }}-${{ matrix.versions.ghc }}-${{ matrix.versions.cabal }}-cabal-local

    - name: Install dependencies
      run: |
          cabal v2-update
          cabal v2-build --dependencies-only --enable-tests --disable-optimization
    - name: Build and test
      run: |
          cabal v2-build --enable-tests --disable-optimization 2>&1 | tee build.log
          # fail if warnings in local build
          ! grep -q ": *[Ww]arning:" build.log || exit 1
          cabal v2-test --disable-optimization

  windows:

    runs-on: windows-2019

    steps:
    - uses: actions/checkout@v1
    - name: Install stack
      shell: cmd
      run: |
          choco install haskell-stack

    # declare/restore cached things
    # caching doesn't work for scheduled runs yet
    # https://github.com/actions/cache/issues/63

    - name: Cache stack global package db
      id:   stack-global-package-db
      uses: actions/cache@v1
      with:
        path: C:\Users\runneradmin\AppData\Roaming\stack\
        key:          ${{ runner.os }}-appdata-roaming-stack-${{ hashFiles('stack.yaml') }}

    # stack's local package dbs for the project and each package
    # - name: Cache .stack-work
    #   uses: actions/cache@v1
    #   with:
    #     path: .stack-work
    #     key:          ${{ runner.os }}-stack-work-${{ hashFiles('stack.yaml') }}
    #     restore-keys: ${{ runner.os }}-stack-work

    - name: Install dependencies
      run: |
          stack update
          stack test --dependencies-only --fast
    - name: Build and test
      shell: cmd
      run: |
          stack test --fast --test-arguments=--hide-successes

  macos:

    runs-on: macOS-10.15

    steps:
    - uses: actions/checkout@v1
    - name: Install stack
      run: |
          curl -L https://get.haskellstack.org/stable/osx-x86_64.tar.gz -o stack.tar.gz
          tar xzvf stack.tar.gz --strip-components=1 'stack*/stack'

    # declare/restore cached things
    # caching doesn't work for scheduled runs yet https://github.com/actions/cache/issues/63

    - name: Cache stack global package db
      id:   stack-global
      uses: actions/cache@v1
      with:
        path: ~/.stack
        key:          ${{ runner.os }}-stack-global-${{ hashFiles('stack.yaml') }}

    # stack's local package db
    # - name: Cache .stack-work
    #   uses: actions/cache@v1
    #   with:
    #     path: .stack-work
    #     key: ${{ runner.os }}-stack-work

    - name: Install dependencies
      run: |
          ./stack update
          ./stack test --dependencies-only --fast
    - name: Build and test
      run: |
          ./stack test --fast --test-arguments=--hide-successes