Revert "Use a factory method to abstract SCMWrapper creation." totally broke gclient.

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 43eaca772c3a9433d15a5e9e3d1504ce9a1cd175..148855c89ffc597d645314df55274da19909f303 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -27,31 +27,23 @@ SVN_COMMAND = "svn"
 ### SCM abstraction layer
 
 
-# Factory Method for SCM wrapper creation
-
-def create_scm(url, root_dir, relpath, scm_name='svn'):
-  # TODO(maruel): Deduce the SCM from the url.
-  scm_map = {
-    'svn' : SVNWrapper,
-  }
-  if not scm_name in scm_map:
-    raise gclient_utils.Error('Unsupported scm %s' % scm_name)
-  return scm_map[scm_name](url, root_dir, relpath, scm_name)
-
-
-# SCMWrapper base class
-
 class SCMWrapper(object):
   """Add necessary glue between all the supported SCM.
 
   This is the abstraction layer to bind to different SCM. Since currently only
   subversion is supported, a lot of subersionism remains. This can be sorted out
   once another SCM is supported."""
-  def __init__(self, url, root_dir, relpath, scm_name='svn'):
+  def __init__(self, url=None, root_dir=None, relpath=None,
+               scm_name='svn'):
+    # TODO(maruel): Deduce the SCM from the url.
     self.scm_name = scm_name
     self.url = url
-    self._root_dir = root_dir.replace('/', os.sep)
-    self.relpath = relpath.replace('/', os.sep)
+    self._root_dir = root_dir
+    if self._root_dir:
+      self._root_dir = self._root_dir.replace('/', os.sep)
+    self.relpath = relpath
+    if self.relpath:
+      self.relpath = self.relpath.replace('/', os.sep)
 
   def FullUrlForRelativeUrl(self, url):
     # Find the forth '/' and strip from there. A bit hackish.
@@ -62,21 +54,21 @@ class SCMWrapper(object):
     if file_list is None:
       file_list = []
 
-    commands = ['cleanup', 'export', 'update', 'revert',
-                'status', 'diff', 'pack', 'runhooks']
+    commands = {
+      'cleanup':  self.cleanup,
+      'export':   self.export,
+      'update':   self.update,
+      'revert':   self.revert,
+      'status':   self.status,
+      'diff':     self.diff,
+      'pack':     self.pack,
+      'runhooks': self.status,
+    }
 
     if not command in commands:
       raise gclient_utils.Error('Unknown command %s' % command)
 
-    if not command in dir(self):
-      raise gclient_utils.Error('Command %s not implemnted in %s wrapper' % (
-          command, self.scm_name))
-
-    return getattr(self, command)(options, args, file_list)
-
-
-class SVNWrapper(SCMWrapper):
-  """ Wrapper for SVN """
+    return commands[command](options, args, file_list)
 
   def cleanup(self, options, args, file_list):
     """Cleanup working copy."""
@@ -266,9 +258,6 @@ class SVNWrapper(SCMWrapper):
         RunSVN(command + accumulated_paths,
                os.path.join(self._root_dir, self.relpath))
 
-  def runhooks(self, options, args, file_list):
-    self.status(options, args, file_list)
-
   def status(self, options, args, file_list):
     """Display status information."""
     path = os.path.join(self._root_dir, self.relpath)