--- a/hgext/narrow/narrowrevlog.py	Wed Oct 10 12:25:28 2018 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,80 +0,0 @@
-# narrowrevlog.py - revlog storing irrelevant nodes as "ellipsis" nodes
-#
-# Copyright 2017 Google, Inc.
-#
-# This software may be used and distributed according to the terms of the
-# GNU General Public License version 2 or any later version.
-
-from __future__ import absolute_import
-
-from mercurial import (
-   revlog,
-   util,
-)
-
-def readtransform(self, text):
-    return text, False
-
-def writetransform(self, text):
-    return text, False
-
-def rawtransform(self, text):
-    return False
-
-revlog.addflagprocessor(revlog.REVIDX_ELLIPSIS,
-                        (readtransform, writetransform, rawtransform))
-
-def setup():
-    # We just wanted to add the flag processor, which is done at module
-    # load time.
-    pass
-
-def makenarrowfilelog(fl, narrowmatch):
-    class narrowfilelog(fl.__class__):
-        def renamed(self, node):
-            # Renames that come from outside the narrowspec are
-            # problematic at least for git-diffs, because we lack the
-            # base text for the rename. This logic was introduced in
-            # 3cd72b1 of narrowhg (authored by martinvonz, reviewed by
-            # adgar), but that revision doesn't have any additional
-            # commentary on what problems we can encounter.
-            m = super(narrowfilelog, self).renamed(node)
-            if m and not narrowmatch(m[0]):
-                return None
-            return m
-
-        def size(self, rev):
-            # We take advantage of the fact that remotefilelog
-            # lacks a node() method to just skip the
-            # rename-checking logic when on remotefilelog. This
-            # might be incorrect on other non-revlog-based storage
-            # engines, but for now this seems to be fine.
-            #
-            # TODO: when remotefilelog is in core, improve this to
-            # explicitly look for remotefilelog instead of cheating
-            # with a hasattr check.
-            if util.safehasattr(self, 'node'):
-                node = self.node(rev)
-                # Because renamed() is overridden above to
-                # sometimes return None even if there is metadata
-                # in the revlog, size can be incorrect for
-                # copies/renames, so we need to make sure we call
-                # the super class's implementation of renamed()
-                # for the purpose of size calculation.
-                if super(narrowfilelog, self).renamed(node):
-                    return len(self.read(node))
-            return super(narrowfilelog, self).size(rev)
-
-        def cmp(self, node, text):
-            different = super(narrowfilelog, self).cmp(node, text)
-            if different:
-                # Similar to size() above, if the file was copied from
-                # a file outside the narrowspec, the super class's
-                # would have returned True because we tricked it into
-                # thinking that the file was not renamed.
-                if super(narrowfilelog, self).renamed(node):
-                    t2 = self.read(node)
-                    return t2 != text
-            return different
-
-    fl.__class__ = narrowfilelog