[PATCH 4 of 9] patch.diffopts: add support for disabling config in plain mode

[Siddharth Agarwal]

# HG changeset patch
# User Siddharth Agarwal <sid0 at fb.com>
# Date 1415864152 28800
#      Wed Nov 12 23:35:52 2014 -0800
# Node ID 7448e2dc8b9141202eeafa310b74d3b2e3d1c882
# Parent  d03e758f55d169b24d7fa1ec6720ba4056917871
patch.diffopts: add support for disabling config in plain mode

diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -1559,8 +1559,9 @@
     pass
 
 def diffopts(ui, opts=None, untrusted=False, section='diff'):
-    def get(key, name=None, getter=ui.configbool):
+    def get(key, name=None, getter=ui.configbool, forceplain=False):
         return ((opts and opts.get(key)) or
+                (ui.plain() and forceplain) or
                 getter(section, name or key, None, untrusted=untrusted))
     return mdiff.diffopts(
         text=opts and opts.get('text'),