Use uv with nox (#5383)

Right now I see creating venvs taking 30 seconds sometimes, this should dramatically speed that up

Author: alex

.github/workflows/benches.yml

@@ -37,7 +37,7 @@ jobs:
           tool: cargo-codspeed
 
       - name: Install nox
-        run: pip install nox
+        run: pip install nox[uv]
 
       - name: Run the benchmarks
         uses: CodSpeedHQ/action@v3

.github/workflows/build.yml

@@ -23,6 +23,9 @@ on:
         type: boolean
         default: false
 
+env:
+  NOX_DEFAULT_VENV_BACKEND: uv
+
 jobs:
   build:
     continue-on-error: ${{ endsWith(inputs.python-version, '-dev') || contains(fromJSON('["3.7", "3.8"]'), inputs.python-version) || contains(fromJSON('["beta", "nightly"]'), inputs.rust) }}
@@ -49,7 +52,7 @@ jobs:
           check-latest: ${{ startsWith(inputs.python-version, 'pypy') }}
 
       - name: Install nox
-        run: python -m pip install --upgrade pip && pip install nox
+        run: python -m pip install --upgrade pip && pip install nox[uv]
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@master

.github/workflows/changelog.yml

@@ -13,5 +13,5 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       - run: nox -s check-changelog

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.13"
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
@@ -73,7 +73,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' || contains(github.event.pull_request.labels.*.name, 'CI-save-pr-cache') }}
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       # This is a smoke test to confirm that CI will run on MSRV (including dev dependencies)
       - name: Check with MSRV package versions
         run: |
@@ -414,7 +414,7 @@ jobs:
           save-if: ${{ github.ref == 'refs/heads/main' || contains(github.event.pull_request.labels.*.name, 'CI-save-pr-cache') }}
       - uses: dtolnay/rust-toolchain@stable
       - uses: taiki-e/install-action@valgrind
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       - run: nox -s test-rust -- release skip-full
     env:
       CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER: valgrind --leak-check=no --error-exitcode=1
@@ -437,7 +437,7 @@ jobs:
         with:
           components: rust-src
       - uses: taiki-e/install-action@cargo-careful
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       - run: nox -s test-rust -- careful skip-full
     env:
       RUST_BACKTRACE: 1
@@ -480,7 +480,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 18
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       - uses: actions/cache/restore@v4
         id: cache
         with:
@@ -528,7 +528,7 @@ jobs:
           echo PYTHONHOME=$(pwd)/python/install >> $GITHUB_ENV
           echo PYO3_PYTHON=$(pwd)/python/install/bin/python3 >> $GITHUB_ENV
       - run: python3 -m sysconfig
-      - run: python3 -m pip install --upgrade pip && pip install nox
+      - run: python3 -m pip install --upgrade pip && pip install nox[uv]
       - run: |
           PYO3_CONFIG_FILE=$(mktemp)
           cat > $PYO3_CONFIG_FILE << EOF
@@ -559,7 +559,7 @@ jobs:
         with:
           save-if: ${{ github.ref == 'refs/heads/main' || contains(github.event.pull_request.labels.*.name, 'CI-save-pr-cache') }}
       - uses: dtolnay/rust-toolchain@stable
-      - run: python3 -m pip install --upgrade pip && pip install nox
+      - run: python3 -m pip install --upgrade pip && pip install nox[uv]
       - run: python3 -m nox -s test-version-limits
 
   check-feature-powerset:
@@ -588,7 +588,7 @@ jobs:
       - uses: taiki-e/install-action@v2
         with:
           tool: cargo-hack,cargo-minimal-versions
-      - run: python3 -m pip install --upgrade pip && pip install nox
+      - run: python3 -m pip install --upgrade pip && pip install nox[uv]
       - run: python3 -m nox -s check-feature-powerset -- ${{ matrix.rust != 'stable' && 'minimal-versions' || '' }}
 
   test-cross-compilation:
@@ -732,7 +732,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' || contains(github.event.pull_request.labels.*.name, 'CI-save-pr-cache') }}
-      - run: python -m pip install --upgrade pip && pip install nox
+      - run: python -m pip install --upgrade pip && pip install nox[uv]
       - run: nox -s test-introspection
     env:
       CARGO_BUILD_TARGET: ${{ matrix.platform.rust-target }}

.github/workflows/netlify-build.yml

@@ -50,7 +50,7 @@ jobs:
       # This builds the book in target/guide/.
       - name: Build the guide
         run: |
-          python -m pip install --upgrade pip && pip install nox
+          python -m pip install --upgrade pip && pip install nox[uv]
           nox -s ${{ github.event_name == 'release' && 'build-guide' || 'check-guide' }}
         env:
           PYO3_VERSION_TAG: ${{ steps.prepare_tag.outputs.tag_name }}
@@ -75,7 +75,7 @@ jobs:
 
       - name: Build the site
         run: |
-          python -m pip install --upgrade pip && pip install nox towncrier requests
+          python -m pip install --upgrade pip && pip install nox[uv] towncrier requests
           nox -s build-netlify-site -- ${{ (github.ref != 'refs/heads/main' && '--preview') || '' }}
 
       # Upload the built site as an artifact for deploy workflow to consume

.netlify/build.sh

@@ -97,7 +97,7 @@ if [ "${INSTALLED_MDBOOK_TABS_VERSION}" != "mdbook-tabs v${MDBOOK_TABS_VERSION}"
     cargo install mdbook-tabs@${MDBOOK_TABS_VERSION} --force
 fi
 
-pip install nox
+pip install nox[uv]
 nox -s build-guide
 mv target/guide/ netlify_build/main/
 

pytests/noxfile.py

@@ -8,7 +8,7 @@
 @nox.session
 def test(session: nox.Session):
     session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
-    session.run_always("python", "-m", "pip", "install", "-v", ".[dev]")
+    session.install("-v", ".[dev]")
 
     def try_install_binary(package: str, constraint: str):
         try: