# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1684539553 -7200
# Node ID a6543983b8f4869129d5fbb412df4497563c0e65
# Parent  58e4842fbfc15e82776075a0b04fcfdd8089531f
stream-clone: check is a compatible protocol can be found

The previous code was explicitly checking if "v2" is listed in the "stream"
bundle2 capability. The new code is checking is there is anything common
between the versions supported client side and server side overlaps.

This prepare the introduction of more stream version than "v2".

diff -r 58e4842fbfc1 -r a6543983b8f4 mercurial/streamclone.py
--- a/mercurial/streamclone.py	Sat May 20 01:22:49 2023 +0200
+++ b/mercurial/streamclone.py	Sat May 20 01:39:13 2023 +0200
@@ -15,6 +15,7 @@
 from .interfaces import repository
 from . import (
     bookmarks,
+    bundle2 as bundle2mod,
     cacheutil,
     error,
     narrowspec,
@@ -89,8 +90,10 @@
 
     bundle2supported = False
     if pullop.canusebundle2:
-        if b'v2' in pullop.remotebundle2caps.get(b'stream', []):
-            bundle2supported = True
+        local_caps = bundle2mod.getrepocaps(repo, role=b'client')
+        local_supported = set(local_caps.get(b'stream', []))
+        remote_supported = set(pullop.remotebundle2caps.get(b'stream', []))
+        bundle2supported = bool(local_supported & remote_supported)
         # else
         # Server doesn't support bundle2 stream clone or doesn't support
         # the versions we support. Fall back and possibly allow legacy.