finding locations of many files via kpse

[Erik Nijenhuis]

Hi Norbert,

The first would lead to a significant change in the CLI implementation, I
assume. As every path then needs its own option set being preceded/post-ceded,
or all options simply apply to every path given. Both options are tricky to
conclude I guess.

The second I know of, as I also had some challenges finding and checking the
right file(s) in Lua.

I ended up using `kpse.in_name_ok` function in order to check if it's OK to
open, like on line 37 of the following file:
        https://github.com/Xerdi/gitinfo-lua/blob/master/scripts/gitinfo-lua-recorder.lua

However, unsure about the performance you may gain. The documentation states
that `kpse.lookup` tends to be 'slower'. Also, if the overhead of error messages
to stdout/err isn't needed, you could also try `kpse.in_name_ok_silent_extended`
to lose some logging overhead.

Hope it helps.

Kind regards, Erik Nijenhuis

On Tue, 2024-07-02 at 12:00 +0200, texhax-request at tug.org wrote:
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>    1. finding locations of many files via kpse (Norbert Preining)
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> Message: 1
> Date: Tue, 2 Jul 2024 18:01:56 +0900
> From: Norbert Preining <norbert at preining.info>
> To: texhax at tug.org
> Subject: finding locations of many files via kpse
> Message-ID: <ZoPCBF4enFRw9Piy at bulldog>
> Content-Type: text/plain; charset=us-ascii
> 
> Hi everyone,
> 
> For a given set of input file names (arguments to includegraphics or
> usepackage or ...), I would like to check the availability/location
> quickly.
> 
> Of course I could call
>         kpsewhich $i
> for each and every file, but I think this is not the most effective way.
> 
> My ideas are in decreasing preference:
> * call kpsewhich with as many arguments as possible, reducing the
>   calling overhead
>         kpsewhich file1 file2 file3 ...
>   (up to maximal possible)
> * use a lua script and the built-in kpse module
> * write a C program that links to libkpathsea and does that
> 
> Any other suggestions?
> 
> Thanks a lot
> 
> Norbert
> 
> --
> PREINING Norbert                              https://www.preining.info
> arXiv / Cornell University   +   IFMGA Guide   +   TU Wien  +  TeX Live
> GPG: 0x860CDC13   fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13
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Met vriendelijke groet,


Erik Nijenhuis | Xerdi
Softwaremaker

A:​ Frans Halsstraat 38
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