Fix import problems with nested namespace packages installed via

``--root`` or ``--single-version-externally-managed``, due to the
parent package not having the child package as an attribute.
(backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4057946

1 files changed, 31 insertions, 31 deletions

diff --git a/setuptools/command/install_egg_info.py b/setuptools/command/install_egg_info.py
index 8f972638..939340c5 100755
--- a/setuptools/command/install_egg_info.py
+++ b/setuptools/command/install_egg_info.py
@@ -56,6 +56,30 @@ class install_egg_info(Command):
             return dst
         unpack_archive(self.source, self.target, skimmer)
 
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     def install_namespaces(self):
         nsp = self._get_all_ns_packages()
         if not nsp: return
@@ -66,6 +90,12 @@ class install_egg_info(Command):
             f = open(filename,'wb')
             for pkg in nsp:
                 pth = tuple(pkg.split('.'))
+                trailer = '\n'
+                if '.' in pkg:
+                    trailer = (
+                        "; m and setattr(sys.modules[%r], %r, m)\n"
+                        % ('.'.join(pth[:-1]), pth[-1])
+                    )
                 f.write(
                     "import sys,new,os; "
                     "p = os.path.join(sys._getframe(1).f_locals['sitedir'], "
@@ -74,12 +104,11 @@ class install_egg_info(Command):
                     "m = not ie and "
                         "sys.modules.setdefault(%(pkg)r,new.module(%(pkg)r)); "
                     "mp = (m or []) and m.__dict__.setdefault('__path__',[]); "
-                    "(p not in mp) and mp.append(p)\n"
+                    "(p not in mp) and mp.append(p)%(trailer)s"
                     % locals()
                 )
             f.close()
 
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     def _get_all_ns_packages(self):
         nsp = {}
         for pkg in self.distribution.namespace_packages or []:
@@ -92,32 +121,3 @@ class install_egg_info(Command):
         return nsp
 
 
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