Find egg info for installed packages with a namespace

[Thomas Lotze]

Something like this:

pkginfo.Installed('foo.bar')

won't find egg info because it isn't looked for in enough places up the directory hierarchy.

The algorithm is to look for egg-info files or directories inside the package or its immediate parent directory, but if the package is nested in one or more namespaces, alongside the distribution is actually one further level up the directory hierarchy for each namespace.

[Tres Seaver (tseaver)]

To reproduce::

  $ virtualenv --no-site-packages /tmp/lp934311
  $ cd /tmp/lp934311
  $ bin/easy_install pkg_info zope.interface
  $ bin/pkginfo zope.interface
  No PKG-INFO found for package: zope.interface
   warnings.warn('No PKG-INFO found for package: %s' % self.package_name)

[Tres Seaver (tseaver)]

Note that we have two issues:

 - namespace packages installed as eggs (e.g., in a virtualenv, as above).

 - namespace packages installed in a "site" directory (e.g., via a package manager).

[Tres Seaver (tseaver)]

http://bazaar.launchpad.net/~tseaver/pkginfo/trunk/revision/71

[Tres Seaver (tseaver)]

Released with version 0.9:

  https://pypi.python.org/pypi/pkginfo/0.9