On 2011-02-01, Jürgen Spitzmüller wrote:
> Julien Rioux wrote:
>> > Is here a TeX method to find out a package version other than LaTeX's
>> > \@ifpackagelater? With the latter, the packages need to be loaded in
>> > advance, and we can't do that in checkconfig.ltx.
>> \RequirePackage[<options>]{<package>}[<date>]
> We cannot use this in checkconfig.ltx either. We are not in "preamble" mode
> when checking for the files, apparently.
The clsguide tells:
The first thing a class or package file does is identify itself. Package
files do this as follows:
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{ package }[ date other information ]
e.g.
\ProvidesPackage{fontspec}
[2008/08/09 v1.18 Advanced font selection for XeLaTeX]
Parsing this should not bee too difficult with Python -- watch that there
might be line breaks between the \ProvidesPackage command and the arguments.
Günter
