[prestest] Message about path not found (windows)

[Siep Kroonenberg]

On Sat, Mar 04, 2023 at 05:26:32PM -0700, Karl Berry wrote:
> Hi Uwe,
> 
>     Das System kann den angegebenen Pfad nicht finden.  (*)
> 
> Thanks for the report.
> 
> Surely about the new context regenerations, based on the point where
> it's occurring (between mktexlsr and updmap-sys), but I don't know what
> to do about it. What tlmgr and install-tl do is this:
> 
>     my $lmtx = "$bindir/luametatex";
>     if (defined($localtlpdb->get_package('context'))
>         && (-x "$lmtx" || -x "$lmtx.exe")
>         && TeXLive::TLUtils::system_ok("$lmtx --version")
>        ) {
>       $errors += do_cmd_and_check("mtxrun --generate");
>       $errors += do_cmd_and_check("context --luatex --generate");
> 
> In other words, if (a) the context package is installed (presumably yes,
> for you), and (b) the luametatex[.exe] file is present and executable,
> and (c) it can actually be run, then (and only then) run ConTeXt's two
> --generate commands (both those scripts end up running the luametatex binary).

Somehow, luametatex --version fails under windows, although not from the
command-line. I propose to stupidly exempt windows from this test:

  && (wndws() || TeXLive::TLUtils::system_ok("$lmtx --version"))

-- 
Siep Kroonenberg