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# SPDX-FileCopyrightText: Copyright (c) 2024-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.

#

# SPDX-License-Identifier: Apache-2.0

on:

workflow_call:

inputs:

host-platform:

required: true

type: string

cuda-version:

required: true

type: string

defaults:

run:

shell: bash --noprofile --norc -xeuo pipefail {0}

permissions:

contents: read # This is required for actions/checkout

jobs:

build:

strategy:

fail-fast: false

matrix:

python-version:

- "3.9"

- "3.10"

- "3.11"

- "3.12"

- "3.13"

name: py${{ matrix.python-version }}

runs-on: ${{ (inputs.host-platform == 'linux-64' && 'linux-amd64-cpu8') ||

(inputs.host-platform == 'linux-aarch64' && 'linux-arm64-cpu8') ||

(inputs.host-platform == 'win-64' && 'windows-2022') }}

steps:

- name: Checkout ${{ github.event.repository.name }}

uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0

with:

fetch-depth: 0

- name: Setup proxy cache

uses: nv-gha-runners/setup-proxy-cache@main

continue-on-error: true

# Skip the cache on Windows nodes outside of our org.

if: ${{ inputs.host-platform != 'win-64' }}

- name: Set up Python

id: setup-python1

uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0

with:

# WAR: setup-python is not relocatable, and cibuildwheel hard-wires to 3.12...

# see https://github.com/actions/setup-python/issues/871

python-version: "3.12"

- name: Set up MSVC

if: ${{ startsWith(inputs.host-platform, 'win') }}

uses: ilammy/msvc-dev-cmd@v1 # TODO: ask admin to allow pinning commits

- name: Set environment variables

env:

CUDA_VER: ${{ inputs.cuda-version }}

HOST_PLATFORM: ${{ inputs.host-platform }}

PY_VER: ${{ matrix.python-version }}

SHA: ${{ github.sha }}

run: ./ci/tools/env-vars build

- name: Dump environment

run: |

env

- name: Install twine

run: |

pip install twine

# To keep the build workflow simple, all matrix jobs will build a wheel for later use within this workflow.

- name: Build and check cuda.pathfinder wheel

run: |

pushd cuda_pathfinder

pip wheel -v --no-deps .

popd

- name: List the cuda.pathfinder artifacts directory

run: |

if [[ "${{ inputs.host-platform }}" == win* ]]; then

export CHOWN=chown

else

export CHOWN="sudo chown"

fi

$CHOWN -R $(whoami) cuda_pathfinder/*.whl

ls -lahR cuda_pathfinder

# We only need/want a single pure python wheel, pick linux-64 index 0.

# This is what we will use for testing & releasing.

- name: Check cuda.pathfinder wheel

if: ${{ strategy.job-index == 0 && inputs.host-platform == 'linux-64' }}

run: |

twine check cuda_pathfinder/*.whl

- name: Upload cuda.pathfinder build artifacts

if: ${{ strategy.job-index == 0 && inputs.host-platform == 'linux-64' }}

uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2

with:

name: cuda-pathfinder-wheel

path: cuda_pathfinder/*.whl

if-no-files-found: error

- name: Build cuda.core wheel

uses: pypa/cibuildwheel@352e01339f0a173aa2a3eb57f01492e341e83865 # v3.1.3

env:

CIBW_BUILD: ${{ env.CIBW_BUILD }}

CIBW_ARCHS_LINUX: "native"

CIBW_BUILD_VERBOSITY: 1

CIBW_BEFORE_BUILD_WINDOWS: "pip install delvewheel"

CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: "delvewheel repair --namespace-pkg cuda -w {dest_dir} {wheel}"

CIBW_ENVIRONMENT: >

CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}

with:

package-dir: ./cuda_core/

output-dir: ${{ env.CUDA_CORE_ARTIFACTS_DIR }}

- name: List the cuda.core artifacts directory

run: |

if [[ "${{ inputs.host-platform }}" == win* ]]; then

export CHOWN=chown

else

export CHOWN="sudo chown"

fi

$CHOWN -R $(whoami) ${{ env.CUDA_CORE_ARTIFACTS_DIR }}

ls -lahR ${{ env.CUDA_CORE_ARTIFACTS_DIR }}

- name: Check cuda.core wheel

run: |

twine check ${{ env.CUDA_CORE_ARTIFACTS_DIR }}/*.whl

- name: Upload cuda.core build artifacts

uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2

with:

name: ${{ env.CUDA_CORE_ARTIFACT_NAME }}

path: ${{ env.CUDA_CORE_ARTIFACTS_DIR }}/*.whl

if-no-files-found: error

- name: Set up mini CTK

uses: ./.github/actions/fetch_ctk

continue-on-error: false

with:

host-platform: ${{ inputs.host-platform }}

cuda-version: ${{ inputs.cuda-version }}

- name: Build cuda.bindings wheel

uses: pypa/cibuildwheel@352e01339f0a173aa2a3eb57f01492e341e83865 # v3.1.3

env:

CIBW_BUILD: ${{ env.CIBW_BUILD }}

CIBW_ARCHS_LINUX: "native"

CIBW_BUILD_VERBOSITY: 1

# CIBW mounts the host filesystem under /host

CIBW_ENVIRONMENT_LINUX: >

CUDA_PATH=/host/${{ env.CUDA_PATH }}

LIBRARY_PATH=/host/${{ env.CUDA_PATH }}/lib

CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}

CIBW_ENVIRONMENT_WINDOWS: >

CUDA_HOME="$(cygpath -w ${{ env.CUDA_PATH }})"

LIB="${CUDA_HOME}\\lib\\x64;${LIB}"

CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}

CIBW_BEFORE_BUILD_WINDOWS: "pip install delvewheel"

CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: "delvewheel repair --namespace-pkg cuda -w {dest_dir} {wheel}"

with:

package-dir: ./cuda_bindings/

output-dir: ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }}

- name: List the cuda.bindings artifacts directory

run: |

if [[ "${{ inputs.host-platform }}" == win* ]]; then

export CHOWN=chown

else

export CHOWN="sudo chown"

fi

$CHOWN -R $(whoami) ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }}

ls -lahR ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }}

- name: Check cuda.bindings wheel

run: |

twine check ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }}/*.whl

- name: Upload cuda.bindings build artifacts

uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2

with:

name: ${{ env.CUDA_BINDINGS_ARTIFACT_NAME }}

path: ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }}/*.whl

if-no-files-found: error

# We only need/want a single pure python wheel, pick linux-64 index 0.

- name: Build and check cuda-python wheel

if: ${{ strategy.job-index == 0 && inputs.host-platform == 'linux-64' }}

run: |

pushd cuda_python

pip wheel -v --no-deps .

twine check *.whl

popd

- name: List the cuda-python artifacts directory

if: ${{ strategy.job-index == 0 && inputs.host-platform == 'linux-64' }}

run: |

if [[ "${{ inputs.host-platform }}" == win* ]]; then

export CHOWN=chown

else

export CHOWN="sudo chown"

fi

$CHOWN -R $(whoami) cuda_python/*.whl

ls -lahR cuda_python

- name: Upload cuda-python build artifacts

if: ${{ strategy.job-index == 0 && inputs.host-platform == 'linux-64' }}

uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2

with:

name: cuda-python-wheel

path: cuda_python/*.whl

if-no-files-found: error

- name: Set up Python

id: setup-python2

uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0

with:

# workaround for actions/runner-images#12377 (the cached 3.13.4 is buggy on Windows)

python-version: ${{ matrix.python-version == '3.13' && '3.13.5' || matrix.python-version }}

- name: Set up Python include paths

run: |

if [[ "${{ inputs.host-platform }}" == linux* ]]; then

echo "CPLUS_INCLUDE_PATH=${Python3_ROOT_DIR}/include/python${{ matrix.python-version }}" >> $GITHUB_ENV

elif [[ "${{ inputs.host-platform }}" == win* ]]; then

echo "CL=/I\"${Python3_ROOT_DIR}\include\python${{ matrix.python-version }}\"" >> $GITHUB_ENV

fi

# For caching

echo "PY_EXT_SUFFIX=$(python -c "import sysconfig; print(sysconfig.get_config_var('EXT_SUFFIX'))")" >> $GITHUB_ENV

- name: Install cuda.pathfinder (required for next step)

run: |

pip install cuda_pathfinder/*.whl

- name: Build cuda.bindings Cython tests

run: |

pip install $(ls ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }}/*.whl)[test]

pushd ${{ env.CUDA_BINDINGS_CYTHON_TESTS_DIR }}

bash build_tests.sh

popd

- name: Upload cuda.bindings Cython tests

uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2

with:

name: ${{ env.CUDA_BINDINGS_ARTIFACT_NAME }}-tests

path: ${{ env.CUDA_BINDINGS_CYTHON_TESTS_DIR }}/test_*${{ env.PY_EXT_SUFFIX }}

if-no-files-found: error

- name: Build cuda.core Cython tests

run: |

pip install $(ls ${{ env.CUDA_CORE_ARTIFACTS_DIR }}/*.whl)[test]

pushd ${{ env.CUDA_CORE_CYTHON_TESTS_DIR }}

bash build_tests.sh

popd

- name: Upload cuda.core Cython tests

uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2

with:

name: ${{ env.CUDA_CORE_ARTIFACT_NAME }}-tests

path: ${{ env.CUDA_CORE_CYTHON_TESTS_DIR }}/test_*${{ env.PY_EXT_SUFFIX }}

if-no-files-found: error