diff mercurial/templater.py @ 45310:f3481e4fcc3a

templater: pass opened file-like object to templatespec

I think I said earlier that I planned to create a special templatespec
variant for built-in templates. That was true (I planned that), but I
ended up (in this patch) just adding a file-like object to the
`mapfile_templatespec()` variant instead.

Differential Revision: https://phab.mercurial-scm.org/D8893

--- a/mercurial/templater.py	Tue Aug 04 13:21:29 2020 -0700
+++ b/mercurial/templater.py	Tue Aug 04 13:22:00 2020 -0700
@@ -994,6 +994,7 @@
     def frommapfile(
         cls,
         mapfile,
+        fp=None,
         filters=None,
         defaults=None,
         resources=None,
@@ -1003,7 +1004,8 @@
     ):
         """Create templater from the specified map file"""
         t = cls(filters, defaults, resources, cache, [], minchunk, maxchunk)
-        fp = _open_mapfile(mapfile)
+        if not fp:
+            fp = _open_mapfile(mapfile)
         cache, tmap, aliases = _readmapfile(fp, mapfile)
         t._loader.cache.update(cache)
         t._loader._map = tmap