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