[TCLCORE] Main graphical environment for the Tk test suite on the CI Linux platform at GitHub

[elns <el...@xs...>]

L.S.

For some Tk scripts it makes a difference in what graphical environment they run[*].

Therefore, I'd very much like to know what graphical environment is used for
the Tk tests that are routinely run on the CI Linux platform at GitHub. I'm specifically interested 
in the following components:

      - windowing system
      - window manager
      - desktop environment

      In case of uncertainty, see [**]


Thanks in advance for any conclusive information,
(Please point me to it if this was already documented somewhere.)

Erik Leunissen
--

[*]  These differences are quite specific, and mostly occur in Tk tests,
      e.g. latency of noticifications of window events. Or in exceptional
      cases, e.g. peculiarities and shortcomings of a specific window manager.

[**] The following three-liner, using the attached script "tkplatform.tcl", should
      identify these components, provided that (on Linux) the "xprop" program
      is available:

		package require Tk
		source tkplatform.tcl
		parray tk_platform

-- end of footnotes --