# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2017-03-16 00:34:26
# Node ID 96929bd6e58d29bc3d44e1db7c1283f224bd1dc1
# Parent  9335dc6b2a9c21864c0086e3dad9ea19a8ed6d5f

pager: skip running the pager if it's set to 'cat'

Avoid useless uses of cat.

diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -935,6 +935,9 @@ class ui(object):
         This is separate in part so that extensions (like chg) can
         override how a pager is invoked.
         """
+        if command == 'cat':
+            # Save ourselves some work.
+            return
         # If the command doesn't contain any of these characters, we
         # assume it's a binary and exec it directly. This means for
         # simple pager command configurations, we can degrade