wireproto: make @wireprotocommand version 1 only by default

For backwards compatibility reasons. We want extension provided
commands to opt in to version 2 rather than get inherited
automatically. This will facilitate a clean break between the
protocols.

As part of this, we duplicate some commands used in tests so
there are different command handlers per transport.

Differential Revision: https://phab.mercurial-scm.org/D3207

mercurial/wireproto.py

@@ -707,7 +707,7 commands = commanddict()
 # For version 2 transports.
 commandsv2 = commanddict()
 
-def wireprotocommand(name, args='', transportpolicy=POLICY_ALL,
+def wireprotocommand(name, args='', transportpolicy=POLICY_V1_ONLY,
                      permission='push'):
     """Decorator to declare a wire protocol command.
 

tests/wireprotohelpers.sh

@@ -16,12 +16,22 from mercurial import (
 )
 
 @wireproto.wireprotocommand('customreadonly', permission='pull')
-def customreadonly(repo, proto):
+def customreadonlyv1(repo, proto):
+    return wireprototypes.bytesresponse(b'customreadonly bytes response')
+
[e-mail]('customreadonly', permission='pull',
+                            transportpolicy=wireproto.POLICY_V2_ONLY)
+def customreadonlyv2(repo, proto):
     return wireprototypes.bytesresponse(b'customreadonly bytes response')
 
 @wireproto.wireprotocommand('customreadwrite', permission='push')
 def customreadwrite(repo, proto):
     return wireprototypes.bytesresponse(b'customreadwrite bytes response')
+
[e-mail]('customreadwrite', permission='push',
+                            transportpolicy=wireproto.POLICY_V2_ONLY)
+def customreadwritev2(repo, proto):
+    return wireprototypes.bytesresponse(b'customreadwrite bytes response')
 EOF
 
 cat >> $HGRCPATH << EOF