name: Stack

on:
  push:
    paths-ignore:
    - 'demo/**'
    - 'docker/**'
    - 'Dockerfile'
    - '.dockerignore'
    - '.ghci'
    - '.gitignore'
    - 'images/**'
    - 'nix/**'
    - 'notebooks/**'
    - 'flake.nix'
    - 'flake.lock'
    - 'README.md'
    - 'hie.yaml'
  pull_request:
    paths-ignore:
    - 'demo/**'
    - 'docker/**'
    - 'Dockerfile'
    - '.dockerignore'
    - '.ghci'
    - '.gitignore'
    - 'images/**'
    - 'nix/**'
    - 'notebooks/**'
    - 'flake.nix'
    - 'flake.lock'
    - 'README.md'
    - 'hie.yaml'

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  linux:
    if: (github.event_name != 'pull_request' && ! github.event.pull_request.head.repo.fork) || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork)
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        stack-yaml:
        - 'stack/stack-8.4.yaml'
        - 'stack/stack-8.6.yaml'
        - 'stack/stack-8.8.yaml'
        - 'stack/stack-8.10.yaml'
        - 'stack/stack-9.0.yaml'
        - 'stack/stack-9.2.yaml'
        - 'stack/stack-9.4.yaml'
        - 'stack/stack-9.6.yaml'
        - 'stack.yaml'

    steps:
    - uses: actions/checkout@v3

    - uses: cachix/install-nix-action@v22
      with:
        install_url: https://releases.nixos.org/nix/nix-2.13.3/install

    - uses: haskell-actions/setup@v2
      name: Setup Haskell Stack
      with:
        enable-stack: true
        stack-version: "latest"

    - uses: actions/cache@v3
      name: Cache Haskell dependencies
      with:
        path: |
          ~/.stack/stack.sqlite3
          ~/.stack/snapshots
        key: ${{ matrix.stack-yaml }}-${{ hashFiles(format('./{0}', matrix.stack-yaml)) }}
        restore-keys: |
          ${{ matrix.stack-yaml }}-${{ hashFiles(format('./{0}', matrix.stack-yaml)) }}
          ${{ matrix.stack-yaml }}-

    - name: Install system dependencies
      run: |
        sudo apt update
        sudo apt install libmagic-dev libgmp-dev libblas-dev liblapack-dev libcairo2-dev libpango1.0-dev libzmq3-dev jq

    - name: Test ipython-kernel
      run: |
        stack build ipython-kernel --flag ipython-kernel:examples --stack-yaml ${{matrix.stack-yaml}}

    - name: Build
      run: |
        export "NIX_PATH=nixpkgs=$(nix run .#print-nixpkgs-master)"
        stack build ihaskell --stack-yaml ${{matrix.stack-yaml}}

    - name: Test
      run: |
        stack test --stack-yaml ${{matrix.stack-yaml}}

    - name: Run integration test
      run: |
        nix build .#jupyterlab
        export PATH="$(pwd)/result/bin:$(pwd)/.local/bin:$PATH"

        stack install --stack-yaml ${{matrix.stack-yaml}}

        ihaskell install --stack --stack-flag="--stack-yaml=$(realpath ${{matrix.stack-yaml}})"

        # Ensure that IHaskell notebook remains unchanged.
        # Run the notebook to regenerate the outputs, then compare the new notebook to the old one.
        test/acceptance.nbconvert.sh jupyter nbconvert