At 09:54 PM 6/7/2011 -0700, James wrote:
On Tue, Jun 7, 2011 at 6:30 PM, P.J. Eby <<mailto:pje@telecommunity.com>pje@telecommunity.com> wrote: At 12:00 AM 6/7/2011 -0700, James wrote: As an example I'm looking at setuptools-0.6c11-py2.7.egg, can someone tell me why setuptools/command/east_install.py in get_site_dirs() does its own computation of where site-packages is? As of 2.7 there are already 4 separate places in the python where this path is computed. Maybe I'm missing something but I don't see why an egg would have an opinion on this matter.
It doesn't do that in order to know where to install things; it does it to know what places are *safe* to install things that need .pth support.
I'm seeing it make up the path and then fail in a copytree since the computed dest directory in my case doesn't exist So I'm not exactly sure what you mean when you say it doesn't.
Unless you override it, easy_install asks the distutils where to install things. So, the "made up path" you're referring to came from the distutils. (Which has yet *another* set of code to generate the path(s)!) If you set "DISTUTILS_DEBUG=yes" in your environment variables, and run the easy_install again, you'll see exactly where every setting comes from. The output of get_site_dirs() is *not* used to determine the installation path, only to *validate* it.
(And unfortunately, there is no way to obtain this list from the site module directly.)
I guess that is the nub, oh well.
cheers, - James