diff mercurial/copies.py @ 42142:5382d8f8530b

changelog: parse copy metadata if available in extras

This lets read back the copy metadata we just started writing. There
are still many places left to teach about getting the copy information
from the changeset, but we have enough ({file_copies}, specifically)
that we can add it now and have some test coverage of it.

Differential Revision: https://phab.mercurial-scm.org/D6186

--- a/mercurial/copies.py	Wed Dec 27 19:49:36 2017 -0800
+++ b/mercurial/copies.py	Wed Dec 27 22:05:20 2017 -0800
@@ -162,8 +162,8 @@
 
 def usechangesetcentricalgo(repo):
     """Checks if we should use changeset-centric copy algorithms"""
-    return (repo.ui.config('experimental', 'copies.read-from') ==
-            'compatibility')
+    return (repo.ui.config('experimental', 'copies.read-from') in
+            ('changeset-only', 'compatibility'))
 
 def _committedforwardcopies(a, b, match):
     """Like _forwardcopies(), but b.rev() cannot be None (working copy)"""