# HG changeset patch
# User Sean Farley <sean.michael.farley@gmail.com>
# Date 2014-07-26 00:36:01
# Node ID 443ef664fb557b850e8ad21d647c992dd8f6f855
# Parent  f8fc5df6a8cf5b7dbd64d3a3fb0e810081125ac5

memctx: create a filectxfn if it is not callable

This will allow future patches to construct a memctx based on another context
or any other store-type object.

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -1596,6 +1596,20 @@ class memctx(committablectx):
         self._filectxfn = filectxfn
         self.substate = {}
 
+        # if store is not callable, wrap it in a function
+        if not callable(filectxfn):
+            def getfilectx(repo, memctx, path):
+                fctx = filectxfn[path]
+                # this is weird but apparently we only keep track of one parent
+                # (why not only store that instead of a tuple?)
+                copied = fctx.renamed()
+                if copied:
+                    copied = copied[0]
+                return memfilectx(repo, path, fctx.data(),
+                                  islink=fctx.islink(), isexec=fctx.isexec(),
+                                  copied=copied, memctx=memctx)
+            self._filectxfn = getfilectx
+
         self._extra = extra and extra.copy() or {}
         if self._extra.get('branch', '') == '':
             self._extra['branch'] = 'default'