Help text for gae.py upload about module yaml naming.

appengine/components/tools/gae.py

 #!/usr/bin/env python
 # Copyright 2014 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """Wrapper around GAE SDK tools to simplify working with multi module apps."""
 
 __version__ = '1.2'
 
 import atexit
@@ skipping 312 matching lines @@
     print('Aborted.')
     return 1
   app.set_default_version(version)
   return 0
 
 
 @subcommand.usage('[module_id module_id ...]')
 def CMDupload(parser, args):
   """Uploads a new version of specific (or all) modules of an app.
 
+  Note that module yamls are expected to be named module-<module name>.yaml
+
   Version name looks like <number>-<commit sha1>[-tainted-<who>], where:
     number      git commit number, monotonically increases with each commit
     commit sha1 upstream commit hash the branch is based of
     tainted     git repo has local modifications compared to upstream branch
     who         username who uploads the tainted version
 
   Doesn't make it a default unless --switch is specified. Use 'switch'
   subcommand to change default serving version.
   """
   parser.add_tag_option()
@@ skipping 161 matching lines @@
     print >> sys.stderr, str(e)
     return 1
   except KeyboardInterrupt:
     # Don't dump stack traces on Ctrl+C, it's expected flow in some commands.
     print >> sys.stderr, '\nInterrupted'
     return 1
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))