upload.py: honor explicit empty title

third_party/upload.py

 #!/usr/bin/env python
 # coding: utf-8
 #
 # Copyright 2007 Google Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
@@ skipping 2422 matching lines @@
   if options.target_ref:
     form_fields.append(("target_ref", options.target_ref))
   if options.cq_dry_run:
     form_fields.append(("cq_dry_run", "1"))
     form_fields.append(("commit", "1"))
   if options.depends_on_patchset:
     form_fields.append(("depends_on_patchset", options.depends_on_patchset))
 
   # Process --message, --title and --file.
   message = options.message or ""
+  explicit_title = options.title is not None
   title = options.title or ""
   if options.file:
     if options.message:
       ErrorExit("Can't specify both message and message file options")
     file = open(options.file, 'r')
     message = file.read()
     file.close()
   title = title or message.split('\n', 1)[0].strip()
-  if not title:
+  if not title and not explicit_title:
     if options.issue:
       prompt = "Title describing this patch set"
     else:
       prompt = "New issue subject"
     title_default = vcs.GetMostRecentCommitSummary()
     if title_default:
       prompt += " [%s]" % title_default
     title = raw_input(prompt + ": ").strip() or title_default
   if not title and not options.issue:
     ErrorExit("A non-empty title is required for a new issue")
@@ skipping 89 matching lines @@
     print
     StatusUpdate("Interrupted.")
     sys.exit(1)
   except auth.AuthenticationError as e:
     print(e, file=sys.stderr)
     sys.exit(1)
 
 
 if __name__ == "__main__":
   main()