Try using GitHub Actions for CI instead of Travis (#234)

Our macOS builds keep timing out on Travis, so let's try GitHub Actions!

1 files changed, 53 insertions, 0 deletions

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 00000000..25432bb2
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,53 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-18.04, macos-latest]
+        include:
+          - os: macos-latest
+            install_deps: brew install llvm@9
+            path_extension: $(brew --prefix llvm@9)/bin
+          - os: ubuntu-18.04
+            install_deps: sudo apt-get install llvm-9-tools llvm-9-dev
+            path_extension: /usr/lib/llvm-9/bin
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout the repository
+      uses: actions/checkout@v2
+
+    - name: Setup Haskell Stack
+      uses: actions/setup-haskell@v1
+      with:
+        enable-stack: true
+        stack-no-global: true
+        stack-version: 'latest'
+
+    - name: Install system dependencies
+      run: |
+        ${{ matrix.install_deps }}
+        echo "::add-path::${{ matrix.path_extension }}"
+
+    - name: Cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.stack
+          $GITHUB_WORKSPACE/.stack-work
+        key: ${{ runner.os }}-${{ hashFiles('**/*.cabal', 'stack*.yaml') }}
+        restore-keys: ${{ runner.os }}-
+
+    - name: Build
+      run: make
+
+    - name: Run tests
+      run: make tests