Added our own rmtree error handler to make sure we can delete correctly delete .svn directories when running the tests on Windows which are read-only for some reason.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15120 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/_os.py

@@ -44,3 +44,23 @@ def safe_join(base, *paths):
         raise ValueError('The joined path (%s) is located outside of the base '
                          'path component (%s)' % (final_path, base_path))
     return final_path
+
+def rmtree_errorhandler(func, path, exc_info):
+    """
+    On Windows, some files are read-only (e.g. in in .svn dirs), so when
+    rmtree() tries to remove them, an exception is thrown.
+    We catch that here, remove the read-only attribute, and hopefully
+    continue without problems.
+    """
+    exctype, value = exc_info[:2]
+    # lookin for a windows error
+    if exctype is not WindowsError or 'Access is denied' not in str(value):
+        raise
+    # file type should currently be read only
+    if ((os.stat(path).st_mode & stat.S_IREAD) != stat.S_IREAD):
+        raise
+    # convert to read/write
+    os.chmod(path, stat.S_IWRITE)
+    # use the original function to repeat the operation
+    func(path)
+