init: add -o, --origin to name manifest remote

The -o option permits the user to control the name of the manifest's
remote, which normally is hardcoded to be 'origin', but can differ
because we derive it at runtime from the configuration file.

Signed-off-by: Shawn O. Pearce <sop@google.com>

repo

@@ -28,7 +28,7 @@ if __name__ == '__main__':
 del magic
 
 # increment this whenever we make important changes to this script
-VERSION = (1, 8)
+VERSION = (1, 9)
 
 # increment this if the MAINTAINER_KEYS block is modified
 KEYRING_VERSION = (1,0)
@@ -109,6 +109,10 @@ group = init_optparse.add_option_group('Manifest options')
 group.add_option('-u', '--manifest-url',
                  dest='manifest_url',
                  help='manifest repository location', metavar='URL')
+group.add_option('-o', '--origin',
+                 dest='manifest_origin',
+                 help="use REMOTE instead of 'origin' to track upstream",
+                 metavar='REMOTE')
 group.add_option('-b', '--manifest-branch',
                  dest='manifest_branch',
                  help='manifest branch or revision', metavar='REVISION')