# HG changeset patch
# User Jun Wu <quark@fb.com>
# Date 2017-03-31 01:23:27
# Node ID 5d11b5edcb0b27d303277312591a9c00ea96a203
# Parent  f424fb180fea18835e7f96feff8b6141fff5ec8e

revlog: use raw revisions in revdiff

See the added comment. revdiff is meant to output the raw delta that will be
written to revlog. It should use raw.

test-revlog-raw.py now shows "addgroupcopy test passed", but there is more
to fix.

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -1239,12 +1239,16 @@ class revlog(object):
             return rev - 1
 
     def revdiff(self, rev1, rev2):
-        """return or calculate a delta between two revisions"""
+        """return or calculate a delta between two revisions
+
+        The delta calculated is in binary form and is intended to be written to
+        revlog data directly. So this function needs raw revision data.
+        """
         if rev1 != nullrev and self.deltaparent(rev2) == rev1:
             return bytes(self._chunk(rev2))
 
-        return mdiff.textdiff(self.revision(rev1),
-                              self.revision(rev2))
+        return mdiff.textdiff(self.revision(rev1, raw=True),
+                              self.revision(rev2, raw=True))
 
     def revision(self, nodeorrev, _df=None, raw=False):
         """return an uncompressed revision of a given node or revision
diff --git a/tests/test-revlog-raw.py.out b/tests/test-revlog-raw.py.out
--- a/tests/test-revlog-raw.py.out
+++ b/tests/test-revlog-raw.py.out
@@ -1,2 +1,3 @@
 local test passed
+addgroupcopy test passed
 abort: crashed: invalid patch