Provide registry for fixer packages.

--HG--
branch : distribute
extra : rebase_source : 6a1259914751bdc18a32b98bd87680fb5fe94e70

setuptools/__init__.py

@@ -31,6 +31,8 @@ run_2to3 = False
 # If we run 2to3 on .py files, should we also convert docstrings?
 # Default: yes; assume that we can detect doctests reliably
 run_2to3_on_doctests = True
+# Package names for fixer packages
+lib2to3_fixer_packages = ['lib2to3.fixes']
 
 def find_packages(where='.', exclude=()):
     """Return a list all Python packages found within directory 'where'

setuptools/command/build_py.py

@@ -23,12 +23,13 @@ try:
         def run_2to3(self, files):
             if not setuptools.run_2to3:
                 return
+            if not self.fixer_names:
+                self.fixer_names = []
+                for p in setuptools.lib2to3_fixer_packages:
+                    self.fixer_names.extend(get_fixers_from_package(p))
             _Mixin2to3.run_2to3(self, files)
             if setuptools.run_2to3_on_doctests:
-                fixer_names = self.fixer_names
-                if fixer_names is None:
-                    fixer_names = get_fixers_from_package('lib2to3.fixes')
-                r = DistutilsRefactoringTool(fixer_names)
+                r = DistutilsRefactoringTool(self.fixer_names)
                 r.refactor(files, write=True, doctests_only=True)
 
 except ImportError: