# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 2012-05-20 19:31:56
# Node ID 2d432a1fc0db1db268503c54aa6a74519074d9f4
# Parent  5b1f869b5548e06a79648be96c40760d5e21e1a4

ui: add _isatty method to easily disable cooked I/O

diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -492,6 +492,11 @@ class ui(object):
         try: self.ferr.flush()
         except (IOError, ValueError): pass
 
+    def _isatty(self, fh):
+        if self.configbool('ui', 'nontty', False):
+            return False
+        return util.isatty(fh)
+
     def interactive(self):
         '''is interactive input allowed?
 
@@ -510,7 +515,7 @@ class ui(object):
         if i is None:
             # some environments replace stdin without implementing isatty
             # usually those are non-interactive
-            return util.isatty(self.fin)
+            return self._isatty(self.fin)
 
         return i
 
@@ -548,12 +553,12 @@ class ui(object):
         if i is None:
             # some environments replace stdout without implementing isatty
             # usually those are non-interactive
-            return util.isatty(self.fout)
+            return self._isatty(self.fout)
 
         return i
 
     def _readline(self, prompt=''):
-        if util.isatty(self.fin):
+        if self._isatty(self.fin):
             try:
                 # magically add command line editing support, where
                 # available