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A collection of helpers for building binary wheels on Azure
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azure-pipeline-build.yml First version May 29, 2019
azure-setup.yml First version May 29, 2019
azure-steps.yml First version May 29, 2019
azure-tests.yml Update for Python 3.8 macOS and Linux Oct 17, 2019 Update for Python 3.8 macOS and Linux Oct 17, 2019

Azure Wheel Helpers

This repository holds a collection of wheel helpers designed by the Scikit-HEP project to build Python Wheels on Azure DevOps. This is designed for packages that require building; if you have a pure-Python project, producing a universal wheel is trivial without this helper collection. This collection assumes some standard paths and procedures, though some of them can be customized.

Supported platforms and caveats

TLDR: Python 2.7, 3.6, and 3.7 on all platforms, along with 3.5 on Linux.

System Arch Python versions
SDist (all) all any (non-binary distribution)
ManyLinux1 (custom GCC 8.3) 64 & 32-bit 2.7, 3.5, 3.6, 3.7
ManyLinux2010 64-bit 2.7, 3.5, 3.6, 3.7
macOS 10.9+ 64-bit 2.7, 3.6, 3.7
Windows 64 & 32-bit 2.7, 3.6, 3.7
  • Linux: Python 3.4 is not supported because Numpy does not support it either.
  • manylinux1: Optional support for GCC 9.1 using docker image; should work but can't be called directly other compiled extensions unless they do the same thing (think that's the main caveat). Supporting 32 bits because it's there for Numpy and PPA for now.
  • manylinux2010: Requires pip 10+ and a version of Linux newer than 2010. This is very new technology. 64-bit only. Eventually this will become the preferred (and then only) way to produce Linux wheels.
  • MacOS: Uses the dedicated 64 bit 10.9+ builds. We are not supporting 3.5 because those no longer provide binaries (could use 32+64 fat 10.6+ but really force to 10.9+, but will not be added unless there is a need for it).
  • Windows: PyBind11 requires compilation with a newer copy of Visual Studio than Python 2.7's Visual Studio 2008; you need to have the [Visual Studio 2015 distributable][msvc2015] installed (the dll is included in 2017 and 2019, as well).


Warning: Azure does not seem to recognize git submodules during the configure phase. Please copy the contents directly into your repository until this is resolved.

This repository should be a git submodule, and should reside in /.ci in your project. To add it:

git submodule add ../../scikit-hep/azure-wheel-helpers.git .ci/azure-wheel-helpers

You should make a copy of the template pipeline and make local edits:

cp .ci/azure-wheel-helpers/azure-pipeline-build.yml .ci/azure-pipeline-build.yml

Make sure you enable this path in Azure as the pipeline, as well as turn on recursive checkouts. See the post here for more details.

The variables you should set are:

  package_name: my_package    # This is the output name, - is replaced by _
  many_linux_base: "" # Could also be "skhep/manylinuxgcc-"

Note: If you do not need local edits, you can also set the variables in the Azure GUI and instead make a symbolic link.

You can adjust the rest of the template as needed. If you need a non-standard procedure, you can change the target of the template inputs to a local file.


Copyright (c) 2019, Henry Schreiner.

Distributed under the 3-clause BSD license, see accompanying file LICENSE or for details.

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