mercurial/formatter.py

--- a/mercurial/formatter.py	Thu Dec 21 21:29:06 2017 +0900
+++ b/mercurial/formatter.py	Thu Dec 21 22:05:30 2017 +0900
@@ -363,11 +363,11 @@
         self._out = out
         spec = lookuptemplate(ui, topic, opts.get('template', ''))
         self._tref = spec.ref
-        self._t = loadtemplater(ui, spec, cache=templatekw.defaulttempl)
+        self._t = loadtemplater(ui, spec, resources=templateresources(ui),
+                                cache=templatekw.defaulttempl)
         self._parts = templatepartsmap(spec, self._t,
                                        ['docheader', 'docfooter', 'separator'])
         self._counter = itertools.count()
-        self._cache = {}  # for templatekw/funcs to store reusable data
         self._renderitem('docheader', {})
 
     def _showitem(self):
@@ -395,7 +395,7 @@
             props['repo'] = props['ctx'].repo()
             props['revcache'] = {}
         props = pycompat.strkwargs(props)
-        g = self._t(ref, ui=self._ui, cache=self._cache, **props)
+        g = self._t(ref, **props)
         self._out.write(templater.stringify(g))
 
     def end(self):
@@ -486,6 +486,15 @@
         t.cache[''] = tmpl
     return t
 
+def templateresources(ui, repo=None):
+    """Create a dict of template resources designed for the default templatekw
+    and function"""
+    return {
+        'cache': {},  # for templatekw/funcs to store reusable data
+        'repo': repo,
+        'ui': ui,
+    }
+
 def formatter(ui, out, topic, opts):
     template = opts.get("template", "")
     if template == "json":