haskell.yml

name: Haskell

on:
  push:
    branches: [master]
    paths-ignore:
      - 'LICENSE'
      - 'README.md'
  pull_request:
    branches: [master]

jobs:
  build:
    strategy: 
      matrix:
        resolver: 
          - stack

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2  

    - name: Install the Haskell Stack 
      run: |
        mkdir -p ~/.local/bin
        curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'

    - name: Cache .stack
      id: cache-stack
      uses: actions/cache@v2
      with:
        path: ~/.stack
        key: ${{ runner.os }}-${{ matrix.resolver }}-${{ hashFiles(format('{0}.yaml', matrix.resolver)) }}
        restore-keys: |
            ${{ runner.os }}-${{ matrix.resolver }}
            ${{ runner.os }}-

    - name: Install GHC 
      run: |
        export PATH=$HOME/.local/bin:$PATH
        stack --stack-yaml=${{ matrix.resolver }}.yaml --no-terminal --install-ghc setup

    - name: Install dependencies
      run: |
        export PATH=$HOME/.local/bin:$PATH
        stack --stack-yaml=${{ matrix.resolver }}.yaml --no-terminal build --only-dependencies --fast
        
    - name: Build 
      run: |
        export PATH=$HOME/.local/bin:$PATH
        stack --stack-yaml=${{ matrix.resolver }}.yaml --no-terminal build --fast