[texhax] Integrating LaTeX and external program with auxiliar file

[José Romildo Malaquias]

In order to implement a package for highlighting source code in LaTeX
with the help of the external program pygmentize
(http://www.pygments.org), I am considering the following procedure:

1) first compilation of the document: the contents of every ocorrences
   of the 'pygments' environment are colected and written to the
   auxiliar file \jobname.pygments.

2) an auxiliar program pygmentex processes the auxiliar file
   \jobname.pygments, replacing every snippet of source code by a
   highlighted version, using the pygments system, producing a new
   auxiliar file \jobname.pygmented.

3) second compilation of the document: the contents of the 'pygments'
   environment, now already hightlighted, are recovered from the
   \jobname.pygmented file, and used in the final typesetting of the
   document.

I am looking for references on how to implement this procedure in
LaTeX. Any help?

Regards,

Romildo