wasp/.github/workflows/ci.yaml

name: CI

on:
  push: { branches: [master] }
  pull_request: { branches: [master] }
  create: { tags: [v*] }

defaults:
  run:
    shell: bash
    working-directory: waspc

jobs:
  cancel:
    name: Cancel redundant actions already in progress
    runs-on: ubuntu-latest
    steps:
      - name: Cancel actions in progress of same workflow and same branch
        uses: styfle/cancel-workflow-action@0.6.0
        with:
          access_token: ${{ github.token }}

  build:
    name: Build Wasp
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os:
          - ubuntu-latest
          - macos-latest
          - windows-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v2

      # TODO: We did not take Windows into account here.
      #   From what we know so far they use different paths, so we should
      #   add those also to cache (conditionally?).
      - name: Set up cache
        uses: actions/cache@v2
        with:
          path: |
            ~/.ghc
            ~/.cabal
            ~/.stack            
          # TODO: Right now, actions/cache updates cache only if cache was not fetched.
          #   This is not ideal for us, because we would ideally update cache even if it
          #   was fetched, because we want to cache any newly installed packages.
          #   This was working normally on Travis and Appveyor.
          #   There is an issue for this, and for now we are using proposed "fix" from it,
          #   https://github.com/actions/cache/issues/342#issuecomment-673371329,
          #   which mitigates the problem by creating new cache for each job and then using
          #   the feature of restore-keys which makes sure that next cache picked is the
          #   latest one. However, this keeps creating new cache each time which is not
          #   ideal because caches keep getting evicted, so for example if Win job
          #   fails multiple times while others don't, its cache will likely get evicted,
          #   making it even slower to test and fix (uffff).
          #   When they fix this, we should remove ${{ github.run_id }} from the end of the key
          #   and also remove restore-keys.
          key: haskell-${{ runner.os }}-${{ hashFiles('waspc/stack.yaml') }}-${{ github.run_id }}
          restore-keys: |
            haskell-${{ runner.os }}-${{ hashFiles('waspc/stack.yaml') }}-            

      # TODO: Remove this step once https://github.com/actions/cache/issues/445 is resolved.
      - name: Fix MacOS problem with corrupt cached executable
        run: rm -r ~/.stack/setup-exe-cache
        if: runner.os == 'macOS'

      - name: Set up environment
        uses: actions/setup-haskell@v1
        with:
          ghc-version: latest
          enable-stack: true
          stack-version: latest

      - name: Verify environment
        run: |
          stack --numeric-version
          ghc --version
                    
      - name: Build dependencies 
        run: stack --install-ghc test --only-dependencies
      
      - name: Build Wasp & Run tests
        run: stack test

# TODO: Add deployment of binaries to Github release.