Update package_name() to work with namespace pkgs

The logic in pyramid.path.package_name() should take into
account the fact that namespace packages created by
setuptools do not have __init__.py[c] files, and so they
have no __file__ attribute.

This resolves an issue with WSME
(https://bugs.launchpad.net/wsme/+bug/1221201)

Change-Id: I39bc32a9c38fa11c4cef22a041077ed9001091be

4 files changed, 29 insertions, 1 deletions

diff --git a/CHANGES.txt b/CHANGES.txt
index 6392c7b3b..5c058a9c5 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,12 @@
 Next Release
 ============
 
+Bug Fixes
+---------
+
+- Fix an exception in ``package_name()`` when resolving the package
+  name for namespace packages.
+
 Backwards Incompatibilities
 ---------------------------
 
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 0ddaebf15..1a5b975d7 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -220,3 +220,5 @@ Contributors
 - Matthew Wilkes, 2013/08/23
 
 - Takahiro Fujiwara, 2013/08/28
+
+- Doug Hellmann, 2013/09/06
diff --git a/pyramid/path.py b/pyramid/path.py
index eb92ea62b..470e766f8 100644
--- a/pyramid/path.py
+++ b/pyramid/path.py
@@ -33,8 +33,12 @@ def package_name(pkg_or_module):
     name of the package itself."""
     if pkg_or_module is None or pkg_or_module.__name__ == '__main__':
         return '__main__'
-    pkg_filename = pkg_or_module.__file__
     pkg_name = pkg_or_module.__name__
+    pkg_filename = getattr(pkg_or_module, '__file__', None)
+    if pkg_filename is None:
+        # Namespace packages do not have __init__.py* files,
+        # and so have no __file__ attribute
+        return pkg_name
     splitted = os.path.split(pkg_filename)
     if splitted[-1] in init_names:
         # it's a package
diff --git a/pyramid/tests/test_path.py b/pyramid/tests/test_path.py
index a07ebeffa..fd927996a 100644
--- a/pyramid/tests/test_path.py
+++ b/pyramid/tests/test_path.py
@@ -154,6 +154,12 @@ class TestPackageName(unittest.TestCase):
         package = DummyPackageOrModule(tests)
         result = self._callFUT(package)
         self.assertEqual(result, 'pyramid.tests')
+
+    def test_it_namespace_package(self):
+        from pyramid import tests
+        package = DummyNamespacePackage(tests)
+        result = self._callFUT(package)
+        self.assertEqual(result, 'pyramid.tests')
         
     def test_it_module(self):
         from pyramid.tests import test_path
@@ -558,3 +564,13 @@ class DummyPackageOrModule:
         if self.raise_exc is not None:
             raise self.raise_exc
         self.__dict__[key] = val
+
+class DummyNamespacePackage:
+    """Has no __file__ attribute.
+    """
+    
+    def __init__(self, real_package_or_module):
+        self.__name__ = real_package_or_module.__name__
+        import os
+        self.package_path = os.path.dirname(
+            os.path.abspath(real_package_or_module.__file__))