% This is chkconfig.ltx, a script which tries to autodetect and
%    document your LaTeX configuration.
% Author: Jean-Marc Lasgouttes (Jean-Marc.Lasgouttes@inria.fr)
% with minimal changes by Asger Alstrup (alstrup@diku.dk).
%
% This script should only be run from the configure script to update
% the files textclass.lst and doc/LyXConfig.lyx
%
% This script is in fact a complete rewrite of the original chkconfig
% script. Expect bugs.

%%% If you want to add new packages/documentclasses to be recognized,
%%% read the explanation that follow and jump to the section 'Actual
%%% inspection code' below. You do not need to understand the ugly
%%% LaTeX code below to help improving chkconfig.ltx :-)
%%%
%%% If you want to add the new package <name>, all you need most of
%%% the times is a two-steps work:
%%% 1- Add the command \TestPackage{<name>}. The syntax is:
%%%    \TestPackage[<file>]{<name>}, which  tests whether <name>.sty
%%%    (or <file>, if this optional parameter is provided) exists.
%%% 2- Add a description for <name> in doc/LyXConfig.lyx.in,
%%%    containing in particular a line like
%%%         Found   @chk_<name>@
%%%    This line will be replaced at configure time by the proper text.
%%%
%%% For document classes, things are even simpler, since you do not
%%% need to edit this file. Just put your layout file in some place
%%% where LyX can find it and add if you wish a description in
%%% LyXConfig.lyx.in, as described above.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%% Initialization part (skip) %%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% we do not want to stop on errors
\nonstopmode\makeatletter

%%% Some useful macros.
%   Several commands are defined to test for packages:
%    \AddLayout{<layout>} adds an entry for <layout> in textclass.lst
%    \AddVariable{<name>}{<value>} creates a new variable chk_<name>,
%      and gives it the value <value>.
%    \TestDocClass{<name>}{<command>} if layout <name> has not already
%      been tested for, execute <command>. Note that you will
%      probably not need to use this directly, since the configure
%      script generates the needed macro calls automatically.
%    \TestPackage[<file>]{<name>} tests whether <name>.sty (or <file>,
%      if it is provided) exists.
%   Both commands call \AddVariable to give value 'yes' or 'no' to
%   the variable chk_<name>.
%%%
\newcommand{\prefix}{+} % the character used by grep to filter 'good' output
\newcommand{\AddLayout}[4][\default]{
  \def\default{#2}
  \immediate\write\layouts{"#2"   "#1"   "#3"   "#4"}}
\newcommand{\AddVariable}[2]{
  \immediate\write\sed{s!@chk_#1@!#2!g}
  \immediate\write\vars{chk_#1='#2'}}
\newcommand{\AddPackage}[1]{
  \immediate\write\packages{#1}}
% Tests whether an item is present
% Syntax: \TestItem{<file>}{<name>}{<type>}{<ext>}{<iftrue>}{<iffalse>}
\newif\ifexists
\newcommand{\TestItem}[6][\default]{
  \def\default{#2}
  \def\files{#1}
  \message{^^J\prefix checking for #3 #2 [#1]...}
  \let\firstelement\relax
  \existstrue
  \@for\file:=\files\do{
    \ifx\firstelement\relax
       \edef\firstelement{\file}
    \fi
    \IfFileExists{\file}
      {}
      {\IfFileExists{\file.#4}{}{\existsfalse}}
  }
  \ifexists
    \message{yes^^J}
    \AddVariable{#2}{yes}
    #5
  \else
    \message{no^^J}
    \AddVariable{#2}{no}
    #6
  \fi}
\newcommand{\TestPackage}[2][\default]{
  \TestItem[#1]{#2}{package}{sty}{\AddPackage{#2}}{}}
\newcommand{\TestDocClass}[2]{
   \def\layoutname{#1}  % remember the name of the layout file
   \@ifundefined{layout@#1}
     {#2  % execute the command
      \global\@namedef{layout@#1}{}}
     {} % we have already tried this one.
}
\newcommand{\DeclareLaTeXClass}[2][\default]{
  \TestItem[#1]{\layoutname}{document class}{cls}
           {\AddLayout[\firstelement]{\layoutname}{#2}{true}}
           {\AddLayout[\firstelement]{\layoutname}{#2}{false}}
}
\newcommand{\DeclareLinuxDocClass}[2][\default]{
  \message{^^J\prefix checking for linuxdoc class \layoutname... }
  \@ifundefined{haslinuxdoc}
    {\message{no^^J}
     \AddLayout[#1]{\layoutname}{#2}{false}}
    {\message{yes^^J}
     \AddLayout[#1]{\layoutname}{#2}{true}}
}
% Only for compatibility. Will be removed later.
\let\DeclareSGMLClass=\DeclareDocBookClass

\newcommand{\DeclareDocBookClass}[2][\default]{
  \message{^^J\prefix checking for docbook\space\space class \layoutname... }
  \@ifundefined{hasdocbook}
    {\message{no^^J}
     \AddLayout[#1]{\layoutname}{#2}{false}}
    {\message{yes^^J}
     \AddLayout[#1]{\layoutname}{#2}{true}}
}

% Stolen from article.cls
\newcommand{\today}{\ifcase\month\or
  January\or February\or March\or April\or May\or June\or
  July\or August\or September\or October\or November\or December\fi
  \space\number\day, \number\year}

% Initializes the files
\typeout{\prefix Inspecting your LaTeX configuration.}
\newwrite{\layouts} \immediate\openout \layouts = textclass.lst
\newwrite{\sed} \immediate\openout \sed  = chkconfig.sed
\newwrite{\vars} \immediate\openout \vars = chkconfig.vars
\newwrite{\packages} \immediate\openout \packages = packages.lst

\immediate\write\layouts{%
# This file declares layouts and their associated definition files.^^J%
# It has been automatically generated by configure^^J%
# Use "Options/Reconfigure" if you need to update it after a^^J%
# configuration change. Run ./configure manually to update the^^J%
# system wide version of this file.}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% ACTUAL CONFIGURATION INSPECTION CODE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Add any new package or document class here.

%%% First, we want the day on which the test has been run.
\AddVariable{date}{\today}

%%% Then, the version of LaTeX we are using
\message{^^J\prefix checking for LaTeX version... \fmtversion}
\AddVariable{fmtversion}{\fmtversion}

%%% And now, the list of available languages
% The trick is to know that \the\everyjob contains something like
%  \typeout{LaTeX2e <2001/06/01>}
%  \typeout{Babel <v3.7h> and hyphenation patterns for american, french, german, ngerman, nohyphenation, loaded.}
% All we have to do is to extract the list from there:
% (1) concatenate all the messages that are displayed everytime the
% format is loaded. The is done by redefining locally \typeout to
% append its argument to the macro \mesg.
\def\mesg{}
{\def\typeout#1{\xdef\mesg{\mesg #1}}
 \the\everyjob}
% (2) strip the useless parts from \mesg. This uses the fact that TeX
% allows to define macros with parameters delimited by arbitrary text.
\def\strip#1patterns for #2, loaded.#3\endmark{\def\langs{#2}}
\expandafter\strip\mesg\endmark
% (3) handle the result
\message{^^J\prefix checking for available hyphenation patterns... \langs}
\AddVariable{languages}{\langs}

%%% Check for ec fonts. Most of this code has been shamelessely stolen
%%% from the file ltxcheck.tex in the LaTeX distribution. In particular,
%%% don't ask me how the macro \ecrm works...
\def\ecrm{%
  \begingroup
    \escapechar-1
    \xdef\reserved@a{%
      \noexpand\in@
        {\expandafter\string\csname ecrm\endcsname}%
        {\expandafter\expandafter\expandafter
           \string\csname T1/cmr/m/n\endcsname}}%
  \endgroup
  \reserved@a}

\message{^^J\prefix checking for default encoding (this may take a long time)^^J}
\font\test=ecrm1000\relax
\ifx\test\nullfont
  \message{^^J\prefix\prefix checking for ec fonts... no^^J}
  \AddVariable{ec}{no}
  \AddVariable{fontenc}{default}
\else
  \message{^^J\prefix\space\space checking for ec fonts... yes^^J}
  \message{^^J\prefix\space\space checking for ec support in LaTeX format...}
  \ecrm
  \ifin@
    \message{yes^^J}
    \AddVariable{ec}{yes}
    \AddVariable{fontenc}{T1}
    \message{^^J \prefix\space\space default encoding will be set to T1^^J}
  \else
    \message{no^^J}
    \AddVariable{ec}{no}
    \AddVariable{fontenc}{default}
  \fi
\fi


%%% Document classes
% The list of layout files has been put in this file here by the
% configure script.
\input{chklayouts}


%%% Packages
\TestPackage{a4}
\TestPackage{a4wide}
\TestPackage{array}
\TestPackage{babel}
\TestPackage{color} % this one should be there if graphics.sty is there.
\TestPackage{fancyhdr}
\TestPackage{floatflt}
\TestPackage{setspace}
\TestPackage{subfigure}
\TestPackage{geometry}
\TestPackage{longtable}
\TestPackage{algorithm}
\TestPackage{rotating}
\TestPackage{latex8}
\TestPackage{url}
\TestPackage{varioref}
\TestPackage{prettyref}
\TestPackage{natbib}
\TestPackage{dvipost}

% The test for the graphics package is slightly more involved...
\newcommand\groption{dvips}
\TestItem{graphicx}{package}{sty}
%  Let's do some clever things to guess the default driver for the
%  graphicx package. The maintainer of the site might have declared it
%  in the file 'graphics.cfg'. Let's hope there are no strange commands
%  in there...
  {\renewcommand\ExecuteOptions[1]{\renewcommand\groption{default}}
   \InputIfFileExists{graphics.cfg}{}{}
   \AddPackage{graphicx}}
  {\renewcommand{\groption}{none}}
\message{^^J\prefix checking for graphics driver... \groption^^J}
\AddVariable{graphicsdriver}{\groption}

% psnfss is in fact the name of a set of style files, among which
% times.sty. If times.sty is here, we will assume that everything is
% fine.
\TestPackage[times.sty]{psnfss}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% END ACTUAL CONFIGURATION INSPECTION CODE %%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% End of the LaTeX job
\immediate\closeout\layouts
\immediate\closeout\sed
\immediate\closeout\vars
\immediate\closeout\packages
\typeout{\prefix Inspection done.}
\typeout{\prefix Read the file doc/LaTeXConfig.lyx for more information.}
% Get the real \end command, that has been hidden by LaTeX
\@@end
