push: use bundle2 to push obsmarkers when possible

mercurial/exchange.py

@@ -438,6 +438,17 b' def _pushb2phases(pushop, bundler):'
                 pushop.ui.warn(msg)
     return handlereply
 
+@b2partsgenerator('obsmarkers')
+def _pushb2obsmarkers(pushop, bundler):
+    if 'obsmarkers' in pushop.stepsdone:
+        return
+    remoteversions = bundle2.obsmarkersversion(bundler.capabilities)
+    if obsolete.commonversion(remoteversions) is None:
+        return
+    pushop.stepsdone.add('obsmarkers')
+    if pushop.outobsmarkers:
+        buildobsmarkerspart(bundler, pushop.outobsmarkers)
+
 @b2partsgenerator('bookmarks')
 def _pushb2bookmarks(pushop, bundler):
     """handle phase push through bundle2"""

tests/test-bundle2.t

@@ -878,6 +878,7 b' push'
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 0 changes to 0 files (-1 heads)
+  remote: 5 new obsolescence markers
   updating bookmark book_eea1
   exporting bookmark book_eea1
   $ hg -R other log -G