[tex-live] TEXDOCVIEW_pdf ???

[David Kastrup]

Manuel Pégourié-Gonnard <mpg at elzevir.fr> writes:

> Heiko Oberdiek scripsit (04.08.2008 17:03)
>> My older texdoc (unknown version, <= 2004) uses TEXMFDOCVIEW_pdf.
>> 
> Yep, it's the shell script version I'm still using at university, too.
>
>> It's quite irritating if every texdoc version uses another
>> environment variables.
>
> Agreed. It's not event released and already many users complained. I was
> bitten by it myself when changing from the shell version to Frank's texlua
> version.
>
>>   viewer_pdf = os.getenv("TEXDOCVIEW_pdf");
>>   if viewer_pdf == nil then viewer_pdf = os.getenv("PDFVIEWER");
>> 
> In r10073:
>
>         viewer_pdf  = os.getenv ("PDFVIEWER")
>         or os.getenv ("TEXDOCVIEW_pdf") or os.getenv ("TEXDOC_VIEWER_PDF"),
>
> and so on. I preferred giving precedence to the new names.

The new names are not new names but established generic ones.
Personally I'd prefer using the following hierarchy:

PDFVIEWER.texdoc
TEXDOCVIEW_pdf (output warning message that it is deprecated)
PDFVIEWER

>> (Or something more elaborate, supporting variable settings in
>> texmf.cnf).

The above scheme mimics texmf environment massaging apart from the
middle bit...

-- 
David Kastrup