Creating a virtualenv and updating so that the compiler is set to mingw32 (so that things like cython can be installed via pip).

readme.md

Execute create-package <package name> from a command prompt to use.

Assumptions:

• ming32 is installed
• the path to the mingw32 compiler is on the PATH
• these files are in the root of you virtualenv directories ex C:\envpy\ ; virtual environments will be created on paths that look like C:\envpy\<package name>

See https://zignar.net/2012/06/17/install-python-on-windows/ for more information.

create-package.bat

virtualenv --distribute --no-site-packages %1
python update-mingw-compiler.py %1

update-mingw-compiler.py

import os
import sys

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Please supply the name of the virtualenv environment.")
        sys.exit(1)

    name = sys.argv[1]
    print("Updating the compiler for environment [{}]".format(name))

    directory = os.path.dirname(os.path.abspath(__file__))

    path = os.path.normpath(
        '{}/{}/Lib/distutils/distutils.cfg'.format(directory, name)
    )

    found_compiler = False
    found_build = False
    lines = ''

    # handle finding a compiler= line
    with open(path, 'r') as distutils:
        for line in distutils:
            if 'compiler=' in line:
                found_compiler = True
                line = 'compiler=mingw32\n'

            if '[build]' in line:
                found_build = True

            lines += line

    # handle case where [build] was found, but no compiler= line
    if not found_compiler and found_build:
        with open(path, 'r') as distutils:
            lines = ''
            for line in distutils:
                lines += line
                if '[build]' in line:
                    lines += 'compiler=mingw32\n'
                    found_compiler = True

    # handle case where no [build] or compiler= lines were found
    if not found_compiler:
        lines += '[build]\n'
        lines += 'compiler=mingw32\n'

    # modify the file
    with open(path, 'w') as distutils:
        distutils.write(lines)