f6e6d0b2c0
* Build Python wheels for OSX (x86_64 and arm64) * Use Conda's libomp when running Python tests * fix * Add comment to explain CIBW_TARGET_OSX_ARM64 * Update release script * Add comments in build_python_wheels.sh * Document wheel pipeline
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####################################
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Automated testing in XGBoost project
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####################################
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This document collects tips for using the Continuous Integration (CI) service of the XGBoost
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project.
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**Contents**
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.. contents::
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:backlinks: none
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:local:
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**************
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GitHub Actions
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**************
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The configuration files are located under the directory
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`.github/workflows <https://github.com/dmlc/xgboost/tree/master/.github/workflows>`_.
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Most of the tests listed in the configuration files run automatically for every incoming pull
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requests and every update to branches. A few tests however require manual activation:
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* R tests with ``noLD`` option: Run R tests using a custom-built R with compilation flag
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``--disable-long-double``. See `this page <https://blog.r-hub.io/2019/05/21/nold/>`_ for more
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details about noLD. This is a requirement for keeping XGBoost on CRAN (the R package index).
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To invoke this test suite for a particular pull request, simply add a review comment
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``/gha run r-nold-test``. (Ordinary comment won't work. It needs to be a review comment.)
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GitHub Actions is also used to build Python wheels targeting MacOS Intel and Apple Silicon. See
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`.github/workflows/python_wheels.yml
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<https://github.com/dmlc/xgboost/tree/master/.github/workflows/python_wheels.yml>`_. The
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``python_wheels`` pipeline sets up environment variables prefixed ``CIBW_*`` to indicate the target
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OS and processor. The pipeline then invokes the script ``build_python_wheels.sh``, which in turns
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calls ``cibuildwheel`` to build the wheel. The ``cibuildwheel`` is a library that sets up a
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suitable Python environment for each OS and processor target. Since we don't have Apple Silion
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machine in GitHub Actions, cross-compilation is needed; ``cibuildwheel`` takes care of the complex
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task of cross-compiling a Python wheel. (Note that ``cibuildwheel`` will call
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``setup.py bdist_wheel``. Since XGBoost has a native library component, ``setup.py`` contains
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a glue code to call CMake and a C++ compiler to build the native library on the fly.)
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