# HG changeset patch
# User Jun Wu <quark@fb.com>
# Date 1491523318 25200
# Node ID 1da9b2a4cbb88f55041bd01d6536cac8d96e1a98
# Parent  d34316ae5c58ce1d0342e2c671c79ee044521151
bundle: allow bundle command to use changegroup3 in tests

Since bundle2 writes changegroup version, we can just reuse the bundle2
format for changegroup3.

This won't enable the bundle command to write changegroup3 in the wild,
since exchange.parsebundlespec only returns changegroup2. It unlocks tests
to override exchange.parsebundlespec and get "hg bundle" write changegroup3.

diff -r d34316ae5c58 -r 1da9b2a4cbb8 mercurial/commands.py
--- a/mercurial/commands.py	Wed Apr 05 23:44:22 2017 -0400
+++ b/mercurial/commands.py	Thu Apr 06 17:01:58 2017 -0700
@@ -1377,9 +1377,11 @@
             bcompression = 'UN'
         bversion = 'HG10' + bcompression
         bcompression = None
+    elif cgversion in ('02', '03'):
+        bversion = 'HG20'
     else:
-        assert cgversion == '02'
-        bversion = 'HG20'
+        raise error.ProgrammingError(
+            'bundle: unexpected changegroup version %s' % cgversion)
 
     # TODO compression options should be derived from bundlespec parsing.
     # This is a temporary hack to allow adjusting bundle compression