diff mercurial/color.py @ 35181:d4805a5e7e70

color: respect HGPLAINEXCEPT=color to allow colors while scripting (issue5749)

I'd also like --color=always on the command-line to override HGPLAIN=1
et al, but that's more work, and this seems like a better fix. We've
got a fair number of programs that actually want to automate hg and
get colored output to users, so they should set HGPLAINEXCEPT=alias
(what we usually recommend), but this has been breaking them because
they then lose color.

.. feature::

  The ``HGPLAINEXCEPT`` environment variable can now include ``color``
  to allow automatic output colorization in otherwise automated
  environments.

Differential Revision: https://phab.mercurial-scm.org/D1532

--- a/mercurial/color.py	Sun Nov 26 11:22:27 2017 +0900
+++ b/mercurial/color.py	Tue Nov 28 13:27:43 2017 -0500
@@ -181,7 +181,7 @@
         configstyles(ui)
 
 def _modesetup(ui):
-    if ui.plain():
+    if ui.plain('color'):
         return None
     config = ui.config('ui', 'color')
     if config == 'debug':