wireproto: properly call clonebundles command

We should not be using _call() to make wire protocol calls because
it isn't part of the peer API.

But clonebundles wasn't part of the supported commands in the
peer API!

So this commit defines that command in the commands interface,
implements it, and teaches the one caller in core to call it using
the command executor interface.

Differential Revision: https://phab.mercurial-scm.org/D3317

mercurial/exchange.py

@@ -2170,7 +2170,8 b' def _maybeapplyclonebundle(pullop):'
     if not remote.capable('clonebundles'):
         return
 
-    res = remote._call('clonebundles')
+    with remote.commandexecutor() as e:
+        res = e.callcommand('clonebundles', {}).result()
 
     # If we call the wire protocol command, that's good enough to record the
     # attempt.

mercurial/localrepo.py

@@ -235,6 +235,9 b' class localpeer(repository.peer):'
     def capabilities(self):
         return self._caps
 
+    def clonebundles(self):
+        return self._repo.tryread('clonebundles.manifest')
+
     def debugwireargs(self, one, two, three=None, four=None, five=None):
         """Used to test argument passing over the wire"""
         return "%s %s %s %s %s" % (one, two, pycompat.bytestr(three),

mercurial/repository.py

@@ -101,6 +101,12 b' class ipeercommands(zi.Interface):'
         Returns a set of string capabilities.
         """
 
+    def clonebundles():
+        """Obtains the clone bundles manifest for the repo.
+
+        Returns the manifest as unparsed bytes.
+        """
+
     def debugwireargs(one, two, three=None, four=None, five=None):
         """Used to facilitate debugging of arguments passed over the wire."""
 

mercurial/wireprotov1peer.py

@@ -322,6 +322,10 b' class wirepeer(repository.peer):'
 
     # Begin of ipeercommands interface.
 
+    def clonebundles(self):
+        self.requirecap('clonebundles', _('clone bundles'))
+        return self._call('clonebundles')
+
     @batchable
     def lookup(self, key):
         self.requirecap('lookup', _('look up remote revision'))