diff mercurial/bundle2.py @ 35763:7eedbd5d4880

streamclone: add support for bundle2 based stream clone

The feature put to use the various bits introduced previously. If the server
supports it, the client will request its stream clone through bundle2 instead of
the legacy 'stream_out' commands. The bundle2 version use the better 'v2'
version of stream bundles.

The 'v2' format is not finalized yet. Now that there are some code running it,
we can start working on it again.

Performance numbers are available at the end of this series.

--- a/mercurial/bundle2.py	Wed Jan 17 14:13:46 2018 +0100
+++ b/mercurial/bundle2.py	Wed Jan 17 16:41:44 2018 +0100
@@ -1487,6 +1487,7 @@
                 'remote-changegroup': ('http', 'https'),
                 'hgtagsfnodes': (),
                 'phases': ('heads',),
+                'stream': ('v2',),
                }
 
 def getrepocaps(repo, allowpushback=False):
@@ -1507,6 +1508,8 @@
         caps['checkheads'] = ('related',)
     if 'phases' in repo.ui.configlist('devel', 'legacy.exchange'):
         caps.pop('phases')
+    if not repo.ui.configbool('experimental', 'bundle2.stream'):
+        caps.pop('stream')
     return caps
 
 def bundle2caps(remote):