ci: normalize toolkit configuration and isolate CUDA 13 versions

.github/workflows/ci-nightly.yml

@@ -61,13 +61,12 @@ jobs:
       - name: Set up Python
         uses: ./.github/actions/setup-hardened-python
         with:
-          python-version: "3.12"
+          python-version: "3.11"
 
       - name: Run CI tools unit tests
         run: |
-          python -m pip install pytest pyyaml==6.0.3
-          # Standalone CI tool tests; skip repo-root conftest.py (imports cuda.pathfinder).
-          python -m pytest -v --noconftest ci/tools/tests
+          python -m pip install pytest==9.1.0 pyyaml==6.0.3 "setuptools-scm[simple]>=8,!=10.1"
+          python -m pytest -v ci/tools/tests
 
   find-wheels:
     if: ${{ github.repository_owner == 'nvidia' && !inputs.documentation-links-only }}

.github/workflows/ci.yml

@@ -258,8 +258,15 @@ jobs:
             echo "Reusable artifacts: run \`${run_id}\` at \`${merge_base}\` on \`${BASE_REF}\`."
           } >> "$GITHUB_STEP_SUMMARY"
 
-      - name: Test CI workplan planner
-        run: python3 -m unittest ci/tools/tests/test_compute_ci_plan.py
+      - name: Set up Python for CI tool tests
+        uses: ./.github/actions/setup-hardened-python
+        with:
+          python-version: "3.11"
+
+      - name: Test CI tools
+        run: |
+          python -m pip install pytest==9.1.0 pyyaml==6.0.3 "setuptools-scm[simple]>=8,!=10.1"
+          python -m pytest -v ci/tools/tests
 
       - name: Compute CI workplan
         id: workplan

.pre-commit-config.yaml

@@ -80,10 +80,10 @@ repos:
 
       - id: check-pixi-cuda-version
         name: Check pixi cuda-version pins track ci/versions.yml
-        entry: python ./ci/tools/check_pixi_cuda_version.py
+        entry: python -m ci.tools.check_pixi_cuda_version
         language: python
         additional_dependencies: [pyyaml==6.0.3]
-        files: '^(ci/versions\.yml|cuda_bindings_13/pixi\.toml|cuda_core/pixi\.toml)$'
+        files: '^(ci/versions\.yml|ci/tools/(bindings_config|check_pixi_cuda_version)\.py|cuda_bindings_13/pixi\.toml|cuda_core/pixi\.toml)$'
         pass_filenames: false
 
       - id: check-mempool-hygiene

ci/__init__.py

@@ -0,0 +1,2 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0

ci/tools/__init__.py

@@ -0,0 +1,2 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0

ci/tools/bindings_config.py

@@ -0,0 +1,60 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""Read bindings package roots and release roles from the existing toolkit pins."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+
+import yaml
+
+DEFAULT_CONFIG = Path(__file__).resolve().parents[2] / "ci" / "versions.yml"
+
+
+@dataclass(frozen=True)
+class BindingsPackage:
+    package_root: str
+    toolkit: tuple[int, int, int]
+    release_status: str
+
+    @property
+    def toolkit_version(self) -> str:
+        return ".".join(map(str, self.toolkit))
+
+    @property
+    def ctk_target(self) -> str:
+        return f"{self.toolkit[0]}.{self.toolkit[1]}"
+
+    @property
+    def cuda_major(self) -> str:
+        return str(self.toolkit[0])
+
+    @property
+    def cuda_variant(self) -> str:
+        return f"cu{self.cuda_major}"
+
+
+@dataclass(frozen=True)
+class BindingsConfig:
+    package_roots: tuple[BindingsPackage, ...]
+
+    def get_package(self, package_root: str) -> BindingsPackage:
+        for package in self.package_roots:
+            if package.package_root == package_root:
+                return package
+        raise ValueError(f"unknown CUDA bindings package root: {package_root!r}")
+
+    def package_for_release_status(self, release_status: str) -> BindingsPackage:
+        return next(package for package in self.package_roots if package.release_status == release_status)
+
+
+def load_config(path: Path = DEFAULT_CONFIG) -> BindingsConfig:
+    """Normalize legacy build/prev_build fields without changing their consumers."""
+    raw = yaml.safe_load(path.read_text(encoding="utf-8"))
+    packages = []
+    for field, release_status in (("build", "current"), ("prev_build", "maintenance")):
+        major, minor, patch = map(int, raw["cuda"][field]["version"].split("."))
+        packages.append(BindingsPackage(f"cuda_bindings_{major}", (major, minor, patch), release_status))
+    return BindingsConfig(tuple(packages))

ci/tools/check_pixi_cuda_version.py

@@ -9,31 +9,27 @@
 import tomllib
 from pathlib import Path
 
-import yaml
+from . import bindings_config
 
 ROOT = Path(__file__).resolve().parents[2]
-VERSIONS_FILE_PATH = ROOT / "ci" / "versions.yml"
-PIXI_FILES = [ROOT / d / "pixi.toml" for d in ("cuda_bindings_13", "cuda_core")]
 
 
 def main() -> int:
-    """Verify cuda_bindings_13/cuda_core pixi pins match ci/versions.yml."""
-    if not VERSIONS_FILE_PATH.is_file():
-        print(f"error: {VERSIONS_FILE_PATH} not found", file=sys.stderr)
-        return 2
+    """Verify current bindings and cuda_core pixi pins match ci/versions.yml."""
     try:
-        build_version = yaml.safe_load(VERSIONS_FILE_PATH.read_text(encoding="utf-8"))["cuda"]["build"]["version"]
-    except (KeyError, TypeError):
-        print(f"error: cuda.build.version not found in {VERSIONS_FILE_PATH}", file=sys.stderr)
+        current = bindings_config.load_config().package_for_release_status("current")
+    except (KeyError, TypeError, ValueError) as exc:
+        print(f"error: invalid CUDA toolkit pins in {bindings_config.DEFAULT_CONFIG}: {exc}", file=sys.stderr)
         return 2
 
-    major, minor, *_ = build_version.split(".")
-    expected = f"{major}.{minor}.*"
-    cuda_feature = f"cu{major}"
+    build_version = current.toolkit_version
+    expected = f"{current.ctk_target}.*"
+    cuda_feature = current.cuda_variant
 
     errors: list[str] = []
     checked: list[str] = []
-    for path in PIXI_FILES:
+    for package_root in (current.package_root, "cuda_core"):
+        path = ROOT / package_root / "pixi.toml"
         if not path.is_file():
             print(f"error: {path} not found", file=sys.stderr)
             return 2
@@ -69,7 +65,7 @@ def main() -> int:
 
     if errors:
         print(
-            f"error: cuda_bindings_13/cuda_core pixi cuda-version pins out of sync with "
+            f"error: {current.package_root}/cuda_core pixi cuda-version pins out of sync with "
             f"ci/versions.yml cuda.build.version={build_version!r} "
             f"(expected pin {expected!r}):",
             file=sys.stderr,

ci/tools/tests/test_bindings_config.py

@@ -0,0 +1,122 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+import runpy
+import shutil
+import subprocess
+import tomllib
+from pathlib import Path
+
+import pytest
+import setuptools
+from packaging.version import Version
+from setuptools_scm import get_version
+
+from ci.tools import check_pixi_cuda_version
+from ci.tools.bindings_config import BindingsPackage, load_config
+
+ROOT = Path(__file__).resolve().parents[3]
+
+
+@pytest.fixture
+def legacy_config(tmp_path):
+    path = tmp_path / "versions.yml"
+    path.write_text('cuda:\n  build:\n    version: "13.4.2"\n  prev_build:\n    version: "12.9.1"\n')
+    return path
+
+
+@pytest.mark.agent_authored(model="gpt-6")
+def test_normalizes_legacy_toolkit_pins(legacy_config):
+    config = load_config(legacy_config)
+    current = config.package_for_release_status("current")
+    maintenance = config.get_package("cuda_bindings_12")
+    assert current == BindingsPackage("cuda_bindings_13", (13, 4, 2), "current")
+    assert maintenance == config.package_for_release_status("maintenance")
+    assert maintenance.toolkit_version == "12.9.1"
+    assert maintenance.ctk_target == "12.9"
+    assert maintenance.cuda_major == "12"
+    assert maintenance.cuda_variant == "cu12"
+
+
+@pytest.fixture
+def pixi_checkout(tmp_path, monkeypatch, legacy_config):
+    for package_root in ("cuda_bindings_13", "cuda_core"):
+        path = tmp_path / package_root / "pixi.toml"
+        path.parent.mkdir()
+        path.write_text(
+            '[workspace.build-variants]\ncuda-version = ["13.4.*"]\n'
+            '[feature.cu13.dependencies]\ncuda-version = "13.4.*"\n'
+        )
+    monkeypatch.setattr(check_pixi_cuda_version, "ROOT", tmp_path)
+    monkeypatch.setattr(check_pixi_cuda_version.bindings_config, "load_config", lambda: load_config(legacy_config))
+    return tmp_path
+
+
+@pytest.mark.agent_authored(model="gpt-6")
+def test_pixi_check_keeps_current_bindings_and_core_contract(pixi_checkout, capsys):
+    # The hook requires only the current bindings workspace.
+    assert check_pixi_cuda_version.main() == 0
+    output = capsys.readouterr().out
+    assert "cuda_bindings_13/pixi.toml" in output
+    assert "cuda_core/pixi.toml" in output
+
+
+@pytest.mark.agent_authored(model="gpt-6")
+def test_pixi_check_reports_core_pin_drift(pixi_checkout, capsys):
+    path = pixi_checkout / "cuda_core" / "pixi.toml"
+    path.write_text(path.read_text().replace('cuda-version = "13.4.*"', 'cuda-version = "13.3.*"'))
+    assert check_pixi_cuda_version.main() == 1
+    assert "cuda_core/pixi.toml: feature.cu13.dependencies.cuda-version='13.3.*'" in capsys.readouterr().err
+
+
+@pytest.mark.agent_authored(model="gpt-6")
+def test_cuda12_milestone_does_not_change_current_package_versions(tmp_path, monkeypatch):
+    current = load_config(ROOT / "ci" / "versions.yml").package_for_release_status("current")
+    for package_root, filename in (("cuda_bindings_13", "pyproject.toml"), ("cuda_python", "setup.py")):
+        destination = tmp_path / package_root / filename
+        destination.parent.mkdir()
+        shutil.copyfile(ROOT / package_root / filename, destination)
+
+    def git(*args):
+        return subprocess.run(  # noqa: S603
+            [  # noqa: S607
+                "git",
+                "-c",
+                "user.name=CI test",
+                "-c",
+                "user.email=ci-test@example.invalid",
+                "-c",
+                "commit.gpgsign=false",
+                "-c",
+                "tag.gpgsign=false",
+                "-c",
+                "core.hooksPath=/dev/null",
+                *args,
+            ],
+            cwd=tmp_path,
+            check=True,
+            capture_output=True,
+            text=True,
+        )
+
+    git("init", "--quiet")
+    git("add", ".")
+    git("commit", "--quiet", "-m", "Current CUDA 13 release")
+    git("tag", f"v{current.toolkit_version}")
+    (tmp_path / "maintenance-change").touch()
+    git("add", ".")
+    git("commit", "--quiet", "-m", "CUDA 12 maintenance milestone")
+    git("tag", "v12.9.11a0")
+
+    with (tmp_path / "cuda_bindings_13" / "pyproject.toml").open("rb") as stream:
+        scm = tomllib.load(stream)["tool"]["setuptools_scm"]
+    assert scm["git_describe_command"][-1] == f"v{current.cuda_major}.*"
+    bindings_version = get_version(root=tmp_path, git_describe_command=scm["git_describe_command"])
+    metadata = {}
+    monkeypatch.setattr(setuptools, "setup", lambda **kwargs: metadata.update(kwargs))
+    monkeypatch.setenv("CUDA_PYTHON_BUILD_MAJOR", "13")
+    runpy.run_path(str(tmp_path / "cuda_python" / "setup.py"))
+    assert Version(bindings_version).release[:2] == current.toolkit[:2]
+    assert metadata["version"] == bindings_version

cuda_bindings_13/pyproject.toml

@@ -112,4 +112,4 @@ markers = [
 [tool.setuptools_scm]
 root = ".."
 version_file = "cuda/bindings/_version.py"
-git_describe_command = ["git", "describe", "--dirty", "--tags", "--long", "--match", "v*[0-9]*"]
+git_describe_command = ["git", "describe", "--dirty", "--tags", "--long", "--match", "v13.*"]

cuda_python/setup.py

@@ -11,7 +11,7 @@
 version = get_version(
     root="..",
     relative_to=__file__,
-    git_describe_command=["git", "describe", "--dirty", "--tags", "--long", "--match", "v*[0-9]*"],
+    git_describe_command=["git", "describe", "--dirty", "--tags", "--long", "--match", "v13.*"],
 )