License Headers Fix

[astachowiczhabana]

Introduces fixheaders, a tool for automated license header management across the repository + fixes license issues.

Key Features

• Multi-format support (Python, C/C++, CUDA, YAML, CMake)
• YAML-based configuration for default and custom headers
• Dry-run mode for safe verification
• Glob pattern matching for file selection

Usage
cd tools/fixheaders; ./run.sh

Pre-Release Process

1. Run Protex scan
2. Identify third-party code matches
3. Add exact copyright headers to appropriate YAML config
4. Run "cd tools/fixheaders; ./run.sh" to apply/verify headers

[Copilot]

Pull request overview

This PR introduces automated license header management across the repository by implementing a fixheaders tool and applying standardized license headers to files.

Key Changes:

• Added Intel Corporation copyright headers (2025) with Apache-2.0 license to all source files
• Included dual licensing for files derived from third-party sources (PyTorch, Torchvision, Codeplay)
• Applied headers to C/C++, CUDA, YAML, and CMake files

Reviewed changes

Copilot reviewed 300 out of 897 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/ATen/native/xpu/sycl/*.{h,cpp}	Added Intel copyright headers to SYCL kernel implementations
src/ATen/native/xpu/mkl/*.{h,cpp}	Added Intel copyright headers to oneMKL wrapper implementations
src/ATen/native/xpu/*.cpp	Added Intel copyright headers to XPU native operations
src/ATen/native/transformers/**/*.{h,cpp}	Added Intel copyright headers with Codeplay dual licensing where applicable
src/ATen/native/sparse/xpu/**/*.{h,cpp}	Added Intel copyright headers to sparse tensor implementations
src/ATen/native/quantized/**/*.{h,cpp}	Added Intel copyright headers to quantization implementations
src/ATen/native/nested/**/*.cpp	Added Intel copyright headers to nested tensor implementations
cmake/**/*.cmake	Added Intel copyright headers to CMake configuration files
CMakeLists.txt, src/ATen/CMakeLists.txt	Added Intel copyright headers to build configuration

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[riverliuintel]

For intel license header, please use https://github.com/intel/torch-xpu-ops/blob/main/LICENSE#L190

[astachowiczhabana]

Hi @riverliuintel. I've updated the Intel license headers according to your suggestion from https://github.com/intel/torch-xpu-ops/blob/main/LICENSE#L190.

Failing TC is:

• op_transformers,test.test_transformers.TestSDPAXpuOnlyXPU,test_flash_attention_unsupport_bhsd_layout_xpu

It's unrelated to this PR, it was enabled few days ago with this PR: pytorch/pytorch#167057