Fix 'gcl help' when not run inside a svn checkout.

gcl.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Wrapper script around Rietveld's upload.py that groups files into
 # changelists.
 
 import getpass
 import os
@@ skipping 78 matching lines @@
 def GetRepositoryRoot():
   """Returns the top level directory of the current repository.
 
   The directory is returned as an absolute path.
   """
   global REPOSITORY_ROOT
   if not REPOSITORY_ROOT:
     infos = gclient.CaptureSVNInfo(os.getcwd(), print_error=False)
     cur_dir_repo_root = infos.get("Repository Root")
     if not cur_dir_repo_root:
-      raise Exception("gcl run outside of repository")
+      raise gclient.Error("gcl run outside of repository")
 
     REPOSITORY_ROOT = os.getcwd()
     while True:
       parent = os.path.dirname(REPOSITORY_ROOT)
       if (gclient.CaptureSVNInfo(parent, print_error=False).get(
               "Repository Root") != cur_dir_repo_root):
         break
       REPOSITORY_ROOT = parent
   return REPOSITORY_ROOT
 
@@ skipping 21 matching lines @@
             directory to the root repository.
 
   Note: The cache will be inconsistent if the same file is retrieved with both
         use_root=True and use_root=False on the same file. Don't be stupid.
   """
   global FILES_CACHE
   if filename not in FILES_CACHE:
     # Don't try to look up twice.
     FILES_CACHE[filename] = None
     # First we check if we have a cached version.
-    cached_file = os.path.join(GetCacheDir(), filename)
+    try:
+      cached_file = os.path.join(GetCacheDir(), filename)
+    except gclient.Error:
+      return None
     if (not os.path.exists(cached_file) or
         os.stat(cached_file).st_mtime > max_age):
       dir_info = gclient.CaptureSVNInfo(".")
       repo_root = dir_info["Repository Root"]
       if use_root:
         url_path = repo_root
       else:
         url_path = dir_info["URL"]
       content = ""
       while True:
@@ skipping 940 matching lines @@
 
 
 def main(argv=None):
   if argv is None:
     argv = sys.argv
 
   if len(argv) == 1:
     Help()
     return 0;
 
-  # Create the directories where we store information about changelists if it
-  # doesn't exist.
-  if not os.path.exists(GetInfoDir()):
-    os.mkdir(GetInfoDir())
-  if not os.path.exists(GetChangesDir()):
-    os.mkdir(GetChangesDir())
-    # For smooth upgrade support, move the files in GetInfoDir() to
-    # GetChangesDir().
-    # TODO(maruel): Remove this code in August 2009.
-    for file in os.listdir(unicode(GetInfoDir())):
-      file_path = os.path.join(unicode(GetInfoDir()), file)
-      if os.path.isfile(file_path) and file != CODEREVIEW_SETTINGS_FILE:
-        shutil.move(file_path, GetChangesDir())
-  if not os.path.exists(GetCacheDir()):
-    os.mkdir(GetCacheDir())
+  try:
+    # Create the directories where we store information about changelists if it
+    # doesn't exist.
+    if not os.path.exists(GetInfoDir()):
+      os.mkdir(GetInfoDir())
+    if not os.path.exists(GetChangesDir()):
+      os.mkdir(GetChangesDir())
+      # For smooth upgrade support, move the files in GetInfoDir() to
+      # GetChangesDir().
+      # TODO(maruel): Remove this code in August 2009.
+      for file in os.listdir(unicode(GetInfoDir())):
+        file_path = os.path.join(unicode(GetInfoDir()), file)
+        if os.path.isfile(file_path) and file != CODEREVIEW_SETTINGS_FILE:
+          shutil.move(file_path, GetChangesDir())
+    if not os.path.exists(GetCacheDir()):
+      os.mkdir(GetCacheDir())
+  except gclient.Error:
+    # Will throw an exception if not run in a svn checkout.
+    pass
 
   # Commands that don't require an argument.
   command = argv[1]
   if command == "opened":
     Opened()
     return 0
   if command == "status":
     Opened()
     print "\n--- Not in any changelist:"
     UnknownFiles([])
@@ skipping 71 matching lines @@
     # the files. This allows commands such as 'gcl diff xxx' to work.
     args =["svn", command]
     root = GetRepositoryRoot()
     args.extend([os.path.join(root, x) for x in change_info.GetFileNames()])
     RunShell(args, True)
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(main())