[konsole] [Bug 371919] New: export COLORTERM=truecolor

[Egmont Koblinger]

https://bugs.kde.org/show_bug.cgi?id=371919

            Bug ID: 371919
           Summary: export COLORTERM=truecolor
           Product: konsole
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: egmont at gmail.com
  Target Milestone: ---

Konsole supports true colors, however, there's no official way of advertising
this feature.

Unfortunately the maintainer of ncurses and terminfo is not interested at all
in adding this possibility to terminfo, see e.g.
https://lists.gnu.org/archive/html/bug-ncurses/2016-08/msg00036.html.

S-Lang, on the other hand, has just released its version 2.3.1 with true color
support. Due to the lack of an "official" way of checking for this feature, the
author decided to look at the COLORTERM environment variable expecting it to be
set to either "truecolor" or "24bit". See
http://lists.jedsoft.org/lists/slang-users/2016/0000014.html.

The probably most well-known application using S-Lang (by default, with ncurses
being an option too) is Midnight Commander. It has a patch on its way to
support true colors, see https://www.midnight-commander.org/ticket/3145.

VTE (gnome-terminal et al) sets this environment variable beginning with
version 0.44, see https://bugzilla.gnome.org/show_bug.cgi?id=754521.

Please make konsole set this variable. This is required for a forthcoming
version of Midnight Commander to support true colors out of the box without any
kind of hacking. Also, being consistent across terminal emulators is the best
we could do to make this a de facto standard and encourage the authors of other
applications that support true colors to also check for this environment
variable rather than everyone coming up with their own individual hacks.

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