unknown setuptools version can be added in the working set, refs #90

--HG--
branch : distribute
extra : rebase_source : c0aabd45025465b61ffd23a2196994f4afece233

CHANGES.txt

@@ -2,6 +2,13 @@
 CHANGES
 =======
 
+-----
+0.6.9
+-----
+
+* Issue 90: unknown setuptools version can be added in the working set
+*
+
 -----
 0.6.8
 -----

distribute.egg-info/entry_points.txt

@@ -52,6 +52,7 @@ test_suite = setuptools.dist:check_test_suite
 eager_resources = setuptools.dist:assert_string_list
 zip_safe = setuptools.dist:assert_bool
 test_loader = setuptools.dist:check_importable
+packages = setuptools.dist:check_packages
 convert_2to3_doctests = setuptools.dist:assert_string_list
 tests_require = setuptools.dist:check_requirements
 

pkg_resources.py

@@ -2253,7 +2253,11 @@ class Distribution(object):
         loc = loc or self.location
 
         if self.project_name == 'setuptools':
-            if '0.7' in self.version:
+            try:
+                version = self.version
+            except ValueError:
+                version = ''
+            if '0.7' in version:
                 raise ValueError(
                     "A 0.7-series setuptools cannot be installed "
                     "with distribute")

setuptools/tests/test_resources.py

@@ -203,15 +203,12 @@ class DistroTests(TestCase):
             version="0.6c9")
         ws.add(d2)
 
-
-
-
-
-
-
-
-
-
+        # a unexisting version needs to work
+        ws = WorkingSet([])
+        d3 = Distribution(
+            "/some/path",
+            project_name="setuptools")
+        ws.add(d3)
 
 
 class EntryPointTests(TestCase):