Add a basic GitHub Actions configuration (#22)

.github/workflows/CI.yml

@@ -0,0 +1,43 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  SCCACHE_GHA_ENABLED: "true"
+  RUSTC_WRAPPER: "sccache"
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+
+      - name: Set up Rust
+        run: rustup show
+
+      - uses: mozilla-actions/sccache-action@v0.0.3
+
+      - run: cargo test
+        working-directory: pyo3-polars
+
+      - run: make install
+        working-directory: example
+
+      - run: venv/bin/python run.py
+        working-directory: example

pyo3-polars/src/lib.rs

@@ -5,6 +5,10 @@
 //!
 //! From `src/lib.rs`.
 //! ```rust
+//! # use polars::prelude::*;
+//! # use pyo3::prelude::*;
+//! # use pyo3_polars::PyDataFrame;
+//!
 //! #[pyfunction]
 //! fn my_cool_function(pydf: PyDataFrame) -> PyResult<PyDataFrame> {
 //!     let df: DataFrame = pydf.into();