fixed host/group var loading when inventory is a directory

lib/ansible/inventory/__init__.py

@@ -566,12 +566,16 @@ class Inventory(object):
 
     def basedir(self):
         """ if inventory came from a file, what's the directory? """
+        dname = self.host_list
         if not self.is_file():
-            return None
+            dname = None
+        elif os.path.isdir(self.host_list):
+            dname = self.host_list
+        else:
             dname = os.path.dirname(self.host_list)
             if dname is None or dname == '' or dname == '.':
                 cwd = os.getcwd()
-            return os.path.abspath(cwd) 
+                dname = cwd
         return os.path.abspath(dname)
 
     def src(self):
@@ -636,6 +640,7 @@ class Inventory(object):
             basedirs = [self._playbook_basedir]
 
         for basedir in basedirs:
+            display.debug('getting vars from %s' % basedir)
 
             # this can happen from particular API usages, particularly if not run
             # from /usr/bin/ansible-playbook