Re: Syntax colour highlighting problem - not working on some of my systems

[Thomas Dickey]

On Sun, Jan 01, 2023 at 08:02:31PM +0000, Chris Green wrote:
> On Sun, Jan 01, 2023 at 06:13:07PM +0000, Chris Green wrote:
> > The eternal problem....
> > 
> > On just *some* of my several Linux systems colour syntax higlighting
> > isn't working.  It always used to work but I really can't see what I
> > might have changed on *some* systems to break it.
> > 
> > The systems and versions and 'working or not' are:-
> > 
> >     backup      xubuntu 22.10   vile 9.8w       colour OK
> >     bison       Android 11      vile 9.8w       colour OK
> >     caracal     Debian 10       vile 9.8        no colour syntax
> >     cheddar     Debian 10       vile 9.8t       colour OK
> >     esprimo     xubuntu 22.04   vile 9.8u       no colour syntax
> >     isbd        Ubuntu 20.04    vile 9.8t       colour OK
> >     odin        Debian 9        vile 9.8s       colour OK
> >     pimedia     Debian 11       vile 9.8u       colour OK
> >     t470        xubuntu 22.10   vile 9.8w       colour OK
> >     tsohost     very old        vile 9.8        no colour syntax
> > 
> > Since esprimo is my main desktop system it's a bit annoying that
> > syntax colouring isn't working there.
> > 
> > On all systems 'show-colors' in vile works fine, so they're all
> > *capable* of colour. The two systems showing just vile 9.8 are ones
> > where I have built vile myself, so they have pretty recent code.
> > 
> > All systems have the same .vilerc and it runs with no errors.  So they
> > all execute:-
> > 
> >     source filters.rc
> >     setv $autocolor-hook HighlightFilter
> >     setv $read-hook HighlightFilter
> >     set autocolor=500
> >     set bcolor=default
> > 
> > I'm stumped!  Can anyone point me at some way to diagnose what's
> > wrong? Could it (possibly) be something to do with built-in or
> > external filters?  If so, how do I tell whether vile was built with
> > 'built-in' or not?
> > 
> Just to add to the fun if I run xvile remotely across an 'ssh -Y'
> connection to esprimo the syntax highlighting works OK.  (that's
> running xvile on esprimo from t470)
> 
> This suggests to me that it's something to do with how vile was built
> (it's the version from the repositories).

vile's running in a terminal.  I'd check if the terminal is configured for
color: disregarding hard-coded stuff, the value of $TERM is used to select
a terminal description.  If it's "vt100" on some machines, that would explain.

Running this from the command-line will show colors only if the terminal is 
configured:

#!/bin/sh
tput blink
tput bold
tput setab 1
tput setaf 4
printf "Hello-"
tput setaf 1
tput setab 4
echo "world"
tput sgr0
read aa

-- 
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net

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