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        "author": "Blur Studio",
        "author_email": "pipeline@blur.com",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 3 - Alpha",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: Implementation :: CPython",
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        "description": "# virtualenvconfig\r\n\r\nModifies pip for a virtualenv to prefer a custom abi tag. This is used to make it easy to install\r\ncompiled c++ packages like numpy and scipy that work for a given Digital Content Creation software\r\n(DCC) like Maya, 3ds Max, Nuke, Houdini, etc.\r\n\r\n## installing\r\n\r\nHere is a example of creating a virtualenv designed to install wheels compatible with DCC's compiled\r\nwith Visual Studio 2015. Create the virtual environment and activate it.\r\n\r\n```\r\n$ virtualenv msvc2015_64\r\n$ msvc2015_64\\Scripts\\activate\r\n(python) $ pip install virtualenvconfig\r\n```\r\n\r\n## Setting the abi\r\n\r\nYou can specify the abi(s) that pip will try to download before the normal wheels. In this example pip\r\nwill try to download wheels with a abi of `vc2015`. If no matching package is found, it will try to\r\ndownload wheels with a abi of `vc2010`. If no matching package is found, it will attempt to find a package\r\nas pip normally does. Make sure to call python so you use the virtualenv's python, not the system python.\r\n\r\n```\r\n(python) $ cd msvc2015_64\\lib\\site-packages\r\n(python) $ python virtualenvconfig.py --set-abi vc2015 --set-abi vc2010\r\n```\r\n\r\n## Activating\r\n\r\nUp to this point, we haven't actually updated pip's behavior. We need to monkey patch pip so it respects\r\nour custom abi settings. This is done by adding/updating sitecustomize.py. When python is being initialized\r\nit will attempt to import `sitecustomize`. Any errors in this file being imported are suppressed.\r\n\r\nThis command will create sitecustomize.py\r\n```\r\n(python) $ virtualenvconfig.py --install\r\n```\r\nIf sitecustomize.py already exists, you need to pass the `--overwrite` or `-o` argument\r\n\r\n```\r\n(python) $ python virtualenvconfig.py --install -o\r\n```\r\n\r\nThis creates sitecustomize.py in the lib folder not the site-packages folder. This makes it so\r\nthe sitecustomize python script is only run when activating the virtualenv, not if the site-packages\r\ndirectory is used without activating the virtualenv.\r\n\r\n# Building custom abi wheels\r\n\r\nNow that we can force pip to prefer a given set of abi's, we need to be able to build pip packages for\r\nthose custom abi's. This can be done by updating your pip package's setup.py file to use a the custom\r\n``bdist_wheel`` class ``abi_bdist_wheel``. This will add a required command line argument to setup.py\r\n``--abi [abi_name]`` allowing you to specify the abi used when building the wheel.\r\n\r\n**An example setup.py:**\r\n```py\r\nfrom setuptools import setup, find_packages\r\nimport virtualenvconfig\r\n\r\nsetup(\r\n\t...,\r\n\t# Force the build command to be passed the target abi as a command line argument\r\n\tcmdclass={'bdist_wheel': virtualenvconfig.abi_bdist_wheel()},\r\n)\r\n```\r\n\r\n# Virtualenv setup at Blur\r\n\r\nBlur creates a virtualenv for each required Microsoft Visual C++ compiled version required for\r\nthe DCC software's we need. For example to support Maya 2018/2019, 3ds Max 2018/19, houdini16.5/17\r\nwe create ``C:\\blur\\lib\\msvc2015_64_qt5\\{release}\\python`` as a python 2.7 virtualenv. We then\r\nactivate and pip install all the packages we want access to in python for these DCC's. This\r\nincludes numpy/scipy compiled for msvc2010, and our custom PyQt and database code compiled with\r\nmsvc2015 to be compatible with the DCC's. Then as part of our startup scripts we insert\r\n``C:\\blur\\lib\\msvc2015_64_qt5\\{release}\\python\\Lib\\site-packages`` at the start of ``sys.path``\r\nallowing the DCC to use the python modules installed there.\r\n\r\n\r\n",
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