[PATCH 3 of 5] pager: skip uisetup if chg is detected

[Jun Wu]

# HG changeset patch
# User Jun Wu <quark at fb.com>
# Date 1457967799 0
#      Mon Mar 14 15:03:19 2016 +0000
# Node ID d931d9d34b74ae2d4ed16737c98bfe6b56ec79e5
# Parent  e14741b16063879d0d4d67a4ad5f0129b8f4f769
pager: skip uisetup if chg is detected

chg has its own pager implementation that it wants to skip pager's uisetup.
It is currently done by redirecting stdout to /dev/null, which has unintended
side effects. This patch makes pager aware of chg and skip uisetup directly
from pager. We may want to merge chg and pager's pager implementation to
make this unnecessary in the future.

diff --git a/hgext/pager.py b/hgext/pager.py
--- a/hgext/pager.py
+++ b/hgext/pager.py
@@ -117,6 +117,10 @@
     if '--debugger' in sys.argv or not ui.formatted():
         return
 
+    # chg has its own pager implementation
+    if 'chgunix' in dispatch._earlygetopt('--cmdserver', sys.argv):
+        return
+
     def pagecmd(orig, ui, options, cmd, cmdfunc):
         p = ui.config("pager", "pager", os.environ.get("PAGER"))
         usepager = False