[Distutils] complicated setup

[Erik Bray]

On Sun, Jun 16, 2013 at 3:13 AM, Ethan Furman <ethan at stoneleaf.us> wrote:
> Here's my file layout:
>
> <root> /
>        |- setup.py
>        |
>        |- enum /
>                |- __init__.py
>                |
>                |- py2_enum.py
>                |
>                |- py3_enum.py
>                |
>                |- test /
>                        |- test_enum.py
>                        |
>                        |- py2_test_enum.py
>                        |
>                        |- py3_test_enum.py
>
> __init__ and test_enum are both smart enough to pull in the correct code
> when imported.  The issue I am having is this:
>
> --8<--------------------------------------------------------------
> ethan at hydra:~$ sudo easy_install enum34
> [sudo] password for ethan:
> Searching for enum34
> Reading http://pypi.python.org/simple/enum34/
> Best match: enum34 0.9
> Downloading
> http://pypi.python.org/packages/source/e/enum34/enum34-0.9.zip#md5=4717b8c328083d816b3b987f24446ad8
> Processing enum34-0.9.zip
> Writing /tmp/easy_install-sB55B5/enum34-0.9/setup.cfg
> Running enum34-0.9/setup.py -q bdist_egg --dist-dir
> /tmp/easy_install-sB55B5/enum34-0.9/egg-dist-tmp-qUYAv5
> SyntaxError: ('invalid syntax',
> ('build/bdist.linux-x86_64/egg/enum/py3_enum.py', 211, 43, '    def
> __call__(cls, value, names=None, *, module=None, type=None):\n'))
>
> SyntaxError: ('invalid syntax',
> ('build/bdist.linux-x86_64/egg/enum/test/py3_test_enum.py', 630, 47, '
> class AutoNumberedEnum(Enum, metaclass=auto_enum):\n'))
>
> zip_safe flag not set; analyzing archive contents...
> SyntaxError: ('invalid syntax',
> ('/usr/local/lib/python2.7/dist-packages/enum34-0.9-py2.7.egg/enum/py3_enum.py',
> 211, 43, '    def __call__(cls, value, names=None, *, module=None,
> type=None):\n'))
>
> SyntaxError: ('invalid syntax',
> ('/usr/local/lib/python2.7/dist-packages/enum34-0.9-py2.7.egg/enum/test/py3_test_enum.py',
> 630, 47, '        class AutoNumberedEnum(Enum, metaclass=auto_enum):\n'))
>
> Adding enum34 0.9 to easy-install.pth file
>
> Installed /usr/local/lib/python2.7/dist-packages/enum34-0.9-py2.7.egg
> Processing dependencies for enum34
> Finished processing dependencies for enum34
> --8<--------------------------------------------------------------
>
> distutils is trying to load the py3 versions, which of course fails on a py2
> install.  The package installs successfully anyway, but if I were a user I
> would be wondering if the install was trustworthy.
>
> It seems to me that I need to either have distutils only install the version
> appropriate files, or to not try to scan the version inappropriate files,
> but at this point I do not know how to do either.
>
> Any pointers would be greatly appreciated.

That's odd.  I work on a package that ships Python 2 and Python 3
versions of some modules and I have never seen this problem before.
Perhaps you could post your setup.py?

Erik