# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1570419411 14400
# Node ID 8f807a83d53b276e814db6a50704863e5b904e3b
# Parent  c17a63eb5d4c6d39567ea2aadd7687af9213526f
sidedata: use only changegroup3 if sidedata is in use

This is necessary to exchange the flags over the wire (and within bundles).

Differential Revision: https://phab.mercurial-scm.org/D6940

diff -r c17a63eb5d4c -r 8f807a83d53b mercurial/changegroup.py
--- a/mercurial/changegroup.py	Sun Oct 06 23:36:51 2019 -0400
+++ b/mercurial/changegroup.py	Sun Oct 06 23:36:51 2019 -0400
@@ -1479,6 +1479,11 @@
         #
         # (or even to push subset of history)
         needv03 = True
+    if b'exp-sidedata-flag' in repo.requirements:
+        needv03 = True
+        # don't attempt to use 01/02 until we do sidedata cleaning
+        versions.discard(b'01')
+        versions.discard(b'02')
     if not needv03:
         versions.discard(b'03')
     return versions