# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 1553061607 25200
# Node ID 6fef387af1daec6515e67f3e857f025f914ddf9b
# Parent  550a172a603b9ed6950f4eab8fea27861e773f67
memfilectx: override copysource() instead of using dummy nodeid

The "_copied" property in basefilectx is used by renamed() and
copysource(). committablefilectx (which memfilectx subclasses)
overrides renamed() and writes it in terms of copysource() instead of
_copied. That means that the nodeid part of "_copied" is memfilectx is
unused. Let's instead override copysource() too so we don't need the
"_copied".

Differential Revision: https://phab.mercurial-scm.org/D6159

diff -r 550a172a603b -r 6fef387af1da mercurial/context.py
--- a/mercurial/context.py	Tue Mar 19 22:58:39 2019 -0700
+++ b/mercurial/context.py	Tue Mar 19 23:00:07 2019 -0700
@@ -2393,9 +2393,10 @@
             self._flags = 'x'
         else:
             self._flags = ''
-        self._copied = None
-        if copysource:
-            self._copied = (copysource, nullid)
+        self._copysource = copysource
+
+    def copysource(self):
+        return self._copysource
 
     def cmp(self, fctx):
         return self.data() != fctx.data()