Add GitHub Actions CI

.github/actions/setup-pixi/action.yml

@@ -0,0 +1,17 @@
+name: "Setup Pixi"
+description: "Install and configure Pixi environment"
+
+inputs:
+  pixi-version:
+    description: "Version of Pixi to install"
+    required: false
+    default: "v0.39.0"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install Pixi
+      uses: prefix-dev/setup-pixi@v0.8.1
+      with:
+        pixi-version: ${{ inputs.pixi-version }}
+        cache: true

.github/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/setup-pixi
+      - name: Build package
+        run: pixi run python -m build
+
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/setup-pixi
+      - name: Run tests
+        run: pixi run -e test test
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/setup-pixi
+      - name: Run linter
+        run: pixi run -e test lint
+
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/setup-pixi
+      - name: Check formatting
+        run: pixi run -e test fmt --check

.gitignore

@@ -4,7 +4,6 @@ Thumbs.db
 
 # Pixi
 .pixi/
-pixi.lock
 
 # Python
 __pycache__/
@@ -55,4 +54,4 @@ htmlcov/
 !.pixi/config.toml
 
 # Data
-data/
+data/