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‎CONTRIBUTING.md‎

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@@ -11,7 +11,15 @@ Thank you for your interest in contributing to CUDA Python! Based on the type of
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2. You want to implement a feature, improvement, or bug fix:
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- Please refer to each component's guideline:
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- [`cuda.core`](https://nvidia.github.io/cuda-python/cuda-core/latest/contribute.html)
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- [`cuda.bindings`](https://nvidia.github.io/cuda-python/cuda-bindings/latest/contribute.html)
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- [`cuda.bindings`](https://nvidia.github.io/cuda-python/cuda-bindings/latest/contribute.html)<sup>[1](#footnote1)</sup>
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- [`cuda.pathfinder`](https://nvidia.github.io/cuda-python/cuda-pathfinder/latest/contribute.html)
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## Table of Contents
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- [Pre-commit](#pre-commit)
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- [Code signing](#code-signing)
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- [Developer Certificate of Origin (DCO)](#developer-certificate-of-origin-dco)
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- [CI infrastructure overview](#ci-infrastructure-overview)
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## Pre-commit
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maintained indefinitely and may be redistributed consistent with
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this project or the open source license(s) involved.
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```
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## CI infrastructure overview
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The CUDA Python project uses a comprehensive CI pipeline that builds, tests, and releases multiple components across different platforms. This section provides a visual overview of our CI infrastructure to help contributors understand the build and release process.
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### CI Pipeline Flow
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![CUDA Python CI Pipeline Flow](ci/ci-pipeline.svg)
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Alternative Mermaid diagram representation:
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```mermaid
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flowchart TD
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%% Trigger Events
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subgraph TRIGGER["🔄 TRIGGER EVENTS"]
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T1["• Push to main branch"]
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T2["• Pull request<br/>• Manual workflow dispatch"]
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T1 --- T2
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end
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%% Build Stage
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subgraph BUILD["🔨 BUILD STAGE"]
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subgraph BUILD_PLATFORMS["Parallel Platform Builds"]
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B1["linux-64<br/>(Self-hosted)"]
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B2["linux-aarch64<br/>(Self-hosted)"]
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B3["win-64<br/>(GitHub-hosted)"]
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end
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BUILD_DETAILS["• Python versions: 3.9, 3.10, 3.11, 3.12, 3.13<br/>• CUDA version: 13.0.0 (build-time)<br/>• Components: cuda-core, cuda-bindings,<br/> cuda-pathfinder, cuda-python"]
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end
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%% Artifact Storage
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subgraph ARTIFACTS["📦 ARTIFACT STORAGE"]
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subgraph GITHUB_ARTIFACTS["GitHub Artifacts"]
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GA1["• Wheel files (.whl)<br/>• Test artifacts<br/>• Documentation<br/>(30-day retention)"]
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end
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subgraph GITHUB_CACHE["GitHub Cache"]
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GC1["• Mini CTK cache"]
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end
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end
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%% Test Stage
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subgraph TEST["🧪 TEST STAGE"]
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subgraph TEST_PLATFORMS["Parallel Platform Tests"]
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TS1["linux-64<br/>(Self-hosted)"]
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TS2["linux-aarch64<br/>(Self-hosted)"]
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TS3["win-64<br/>(GitHub-hosted)"]
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end
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TEST_DETAILS["• Download wheels from artifacts<br/>• Test against multiple CUDA runtime versions<br/>• Run Python unit tests, Cython tests, examples"]
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ARTIFACT_FLOWS["Artifact Flows:<br/>• cuda-pathfinder: main → backport<br/>• cuda-bindings: backport → main"]
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end
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%% Release Pipeline
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subgraph RELEASE["🚀 RELEASE PIPELINE"]
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subgraph RELEASE_STAGES["Sequential Release Steps"]
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R1["Validation<br/>• Artifact integrity<br/>• Git tag verification"]
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R2["Publishing<br/>• PyPI/TestPyPI<br/>• Component or all releases"]
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R3["Documentation<br/>• GitHub Pages<br/>• Release notes"]
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R1 --> R2 --> R3
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end
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RELEASE_DETAILS["• Manual workflow dispatch with run ID<br/>• Supports individual component or full releases"]
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end
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%% Main Flow
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TRIGGER --> BUILD
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BUILD -.->|"wheel upload"| ARTIFACTS
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ARTIFACTS -.-> TEST
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TEST --> RELEASE
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%% Artifact Flow Arrows (Cache Reuse)
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GITHUB_CACHE -.->|"mini CTK reuse"| BUILD
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GITHUB_CACHE -.->|"mini CTK reuse"| TEST
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%% Artifact Flow Arrows (Wheel Fetch)
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GITHUB_ARTIFACTS -.->|"wheel fetch"| TEST
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GITHUB_ARTIFACTS -.->|"wheel fetch"| RELEASE
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%% Styling
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classDef triggerStyle fill:#e8f4fd,stroke:#2196F3,stroke-width:2px,color:#1976D2
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classDef buildStyle fill:#f3e5f5,stroke:#9C27B0,stroke-width:2px,color:#7B1FA2
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classDef artifactStyle fill:#fff3e0,stroke:#FF9800,stroke-width:2px,color:#F57C00
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classDef testStyle fill:#e8f5e8,stroke:#4CAF50,stroke-width:2px,color:#388E3C
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classDef releaseStyle fill:#ffebee,stroke:#f44336,stroke-width:2px,color:#D32F2F
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class TRIGGER,T1,T2 triggerStyle
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class BUILD,BUILD_PLATFORMS,B1,B2,B3,BUILD_DETAILS buildStyle
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class ARTIFACTS,GITHUB_ARTIFACTS,GITHUB_CACHE,GA1,GC1 artifactStyle
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class TEST,TEST_PLATFORMS,TS1,TS2,TS3,TEST_DETAILS,ARTIFACT_FLOWS testStyle
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class RELEASE,RELEASE_STAGES,R1,R2,R3,RELEASE_DETAILS releaseStyle
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```
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### Pipeline Execution Details
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**Parallel Execution**: The CI pipeline leverages parallel execution to optimize build and test times:
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- **Build Stage**: Different architectures/operating systems (linux-64, linux-aarch64, win-64) are built in parallel across their respective runners
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- **Test Stage**: Different architectures/operating systems/CUDA versions are tested in parallel; documentation preview is also built in parallel with testing
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### Branch-specific Artifact Flow
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#### Main Branch
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- **Build** → **Test** → **Documentation** → **Potential Release**
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- Artifacts stored as `{component}-python{version}-{platform}-{sha}`
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- Full test coverage across all platforms and CUDA versions
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- **Artifact flow out**: `cuda-pathfinder` artifacts → backport branches
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#### Backport Branches
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- **Build** → **Test** → **Backport PR Creation**
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- Artifacts used for validation before creating backport pull requests
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- Maintains compatibility with older CUDA versions
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- **Artifact flow in**: `cuda-pathfinder` artifacts ← main branch
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- **Artifact flow out**: older `cuda-bindings` artifacts → main branch
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### Key Infrastructure Details
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- **Self-hosted runners**: Used for Linux builds and GPU testing (more resources, faster builds)
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- **GitHub-hosted runners**: Used for Windows builds and general tasks
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- **Artifact retention**: 30 days for GitHub Artifacts (wheels, docs, tests)
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- **Cache retention**: GitHub Cache for build dependencies and environments
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- **Security**: All commits must be signed, untrusted code blocked
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- **Parallel execution**: Matrix builds across Python versions and platforms
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- **Component isolation**: Each component (core, bindings, pathfinder, python) can be built/released independently
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---
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<a>1</a>: The `cuda-python` meta package shares the same license and the contributing guidelines as those of `cuda-bindings`.

‎ci/.ci-pipeline-regen.md‎

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# CUDA Python CI Pipeline SVG Regeneration Instructions
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This file contains the prompt and requirements for regenerating `ci-pipeline.svg` with the same styling and content.
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## Styling Requirements
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- Hand-drawn Excalidraw-style design with rough, sketchy borders
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- Comic Sans MS font family for all text
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- Imperfect lines and curves that mimic hand-drawn aesthetics
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- Canvas size: 900x800 pixels
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- Color scheme:
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- Trigger Events: #e8f4fd background, #2196F3 border, #1976D2 text
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- Build Stage: #f3e5f5 background, #9C27B0 border, #7B1FA2 text
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- Artifact Storage: #fff3e0 background, #FF9800 border, #F57C00 text
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- Test Stage: #e8f5e8 background, #4CAF50 border, #388E3C text
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- Release Pipeline: #ffebee background, #f44336 border, #D32F2F text
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## Content Structure
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1. **Title**: "CUDA Python CI Pipeline Flow"
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2. **Trigger Events** (top blue box):
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- Push to main branch
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- Pull request
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- Manual workflow dispatch
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3. **Build Stage** (purple box):
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- Three platform boxes: linux-64 (Self-hosted), linux-aarch64 (Self-hosted), win-64 (GitHub-hosted)
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- Details: Python versions 3.9-3.13, CUDA 13.0.0 (build-time)
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- Components: cuda-core, cuda-bindings, cuda-pathfinder, cuda-python
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4. **Artifact Storage** (orange box):
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- GitHub Artifacts box: Wheel files (.whl), Test artifacts, Documentation (30-day retention)
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- GitHub Cache box: Mini CTK cache
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5. **Test Stage** (green box):
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- Three platform boxes: linux-64 (Self-hosted), linux-aarch64 (Self-hosted), win-64 (GitHub-hosted)
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- Details: Download wheels from artifacts, Test against multiple CUDA runtime versions, Run Python unit tests, Cython tests, examples
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- Artifact Flows (in red text):
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• cuda-pathfinder: main → backport
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• cuda-bindings: backport → main
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6. **Release Pipeline** (red box):
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- Three sequential boxes: Validation → Publishing → Documentation
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- Validation: Artifact integrity, Git tag verification
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- Publishing: PyPI/TestPyPI, Component or all releases
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- Documentation: GitHub Pages, Release notes
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- Details: Manual workflow dispatch with run ID, Supports individual component or full releases
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## Arrow Requirements
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- Main flow arrows: Trigger → Build → Artifact → Test → Release
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- Additional artifact flow arrows (dashed, orange #FF9800):
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- From GitHub Cache (mini CTK) back to Build Stage with "mini CTK reuse" label
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- From GitHub Artifacts (wheels) to Release Pipeline with "wheel fetch" label
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- **NEW**: From GitHub Cache (mini CTK) to Test Stage with "mini CTK reuse" label
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- **NEW**: From GitHub Artifacts (wheels) to Test Stage with "wheel fetch" label
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- Arrow marker definition with hand-drawn style (orange arrow heads, not black)
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- Use stroke-dasharray="5,3" for artifact flow arrows
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## Critical Arrow Positioning Requirements (UPDATED)
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**IMPORTANT**: Arrows must NOT overlap with stage boxes. Ensure proper clearance:
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1. **Mini CTK reuse arrow** (GitHub Cache → Build Stage):
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- Arrow endpoint Y coordinate must be BELOW the Build Stage box edge (y=292)
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- Use y=295 or greater for the endpoint to ensure no overlap
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- Position "mini CTK reuse" text to the RIGHT of the arrow (not left) for less visual clutter
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- Text color should be orange (#FF9800) to match arrow
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2. **Wheel fetch arrow** (GitHub Artifacts → Release Pipeline):
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- Arrow endpoint Y coordinate must be ABOVE the Release Pipeline box edge (y=652)
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- Use y=645 or smaller for the endpoint to provide proper margin
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- Position "wheel fetch" text between Test Stage and Release Pipeline boxes
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- Text should be to the LEFT of the arrow for better spacing
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## Font Size Requirements (UPDATED)
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- ALL text labels must use consistent 12pt font size for readability
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- No 9pt text - this is too small and hard to read
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- Title: 16pt, Stage headers: 14pt, All other text: 12pt
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## Key Features
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- All boxes use rough, hand-drawn paths (not perfect rectangles)
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- Text should be properly sized and positioned within boxes
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- Platform boxes within each stage should be clearly separated
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- Maintain consistent spacing and alignment
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- Orange arrow heads must match the orange arrow color
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## Text Positioning
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- Use text-anchor="middle" for centered headers
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- Use text-anchor="start" for left-aligned bullet points
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- Ensure all text fits within their enclosing boxes
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- Use transforms for angled text labels on artifact flow arrows
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- Artifact flow arrow text positioning is critical - follow positioning requirements above
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## Recent Manual Adjustments Applied
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- Fixed arrow endpoint positioning to prevent overlap with stage boxes
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- Moved mini CTK reuse arrow endpoint from y=285 to y=295
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- Moved wheel fetch arrow endpoint from y=650 to y=645
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- Repositioned text labels for better visual separation
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- Standardized all text to 12pt font size for consistency
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- Changed arrow heads from black to orange to match arrow color

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