# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2015-09-29 19:14:03
# Node ID 42733e956887b68f4e53dac854232230c77b1d7f
# Parent  749d913f24b86e3b5b9728de661fa693a20bb312

changegroup: reformat packermap and add comment

I'm about to add a cg3, and it seems prudent to annotate what formats
support what features. It strikes me that we may want to consider
moving to a more feature-oriented model in the future, but we'll see
how that looks in a little while I guess.

diff --git a/mercurial/changegroup.py b/mercurial/changegroup.py
--- a/mercurial/changegroup.py
+++ b/mercurial/changegroup.py
@@ -776,7 +776,9 @@ class cg2packer(cg1packer):
         return struct.pack(self.deltaheader, node, p1n, p2n, basenode, linknode)
 
 packermap = {'01': (cg1packer, cg1unpacker),
-             '02': (cg2packer, cg2unpacker)}
+             # cg2 adds support for exchanging generaldelta
+             '02': (cg2packer, cg2unpacker),
+}
 
 def _changegroupinfo(repo, nodes, source):
     if repo.ui.verbose or source == 'bundle':