use uv in ci

Author: Icxolu

.github/workflows/ci.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - main
       - release-*
+      - ci-*
   pull_request:
 
 concurrency:
@@ -26,22 +27,12 @@ jobs:
   test:
     name: python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }}
     runs-on: ${{ matrix.platform.os }}
-    needs: [lint, check-msrv, examples]
+    # needs: [lint, check-msrv, examples]
     strategy:
       fail-fast: ${{ !contains(github.event.pull_request.labels.*.name, 'CI-no-fail-fast') }}
       matrix:
-        python-version:
-          [
-            "3.8",
-            "3.9",
-            "3.10",
-            "3.11",
-            "3.12",
-            "3.13",
-            "3.14",
-            "3.14t",
-            "pypy-3.11",
-          ]
+        # python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "pypy-3.11"]
+        python-version: ["3.14", "3.14t", "3.15", "3.15t", "pypy-3.11"]
         platform:
           [
             {
@@ -85,24 +76,37 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           architecture: ${{ matrix.platform.python-architecture }}
+          allow-prereleases: ${{ startsWith(matrix.python-version, '3.15') }}
+      - name: Set up UV
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
+        with:
+          enable-cache: false
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
         with:
           targets: ${{ matrix.platform.rust-target }}
       - name: Test
-        run: |
-          pip install "numpy" ml_dtypes
-          cargo test --all-features
         # Not on PyPy, because no embedding API
         if: ${{ !startsWith(matrix.python-version, 'pypy') }}
+        run: |
+          uv pip install "numpy" ml_dtypes
+          cargo test --all-features
+      - name: Test abi3t
+        if: ${{ matrix.python-version == '3.15t' }}
+        run: |
+          cargo test --all-features -F pyo3/abi3t
       - name: Test example
         run: |
-          pip install nox
-          nox -f examples/simple/noxfile.py
+          uvx nox -f examples/simple/noxfile.py
     env:
       CARGO_TERM_VERBOSE: true
       CARGO_BUILD_TARGET: ${{ matrix.platform.rust-target }}
       RUST_BACKTRACE: 1
+      UV_SYSTEM_PYTHON: true
+      UV_PRERELEASE: ${{ startsWith(matrix.python-version, '3.15') && 'allow' || 'disallow' }}
+      UV_NO_BUILD_PACKAGE: "numpy"
+      UV_INDEX: ${{ startsWith(matrix.python-version, '3.15') && 'https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/' || '' }}
+      NOX_DEFAULT_VENV_BACKEND: "uv"
 
   test-numpy1:
     name: python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} numpy1