%%
%% Project: warning
%% Version: 2023-03-18 v0.10
%% Info: Global warnings at the end of the screen output and the logfile
%%
%% Copyright © 2001, 2023 Harald Harders (harald.harders@gmx.de; inactive)
%% (2023-03-18 update done by H.-Martin Münch, <Martin dot Muench at Uni-Bonn dot de>)
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either
%% version 1.3c of this license or (at your option) any later
%% version. This version of this license is in
%%    https://www.latex-project.org/lppl/lppl-1-3c.txt
%% and the latest version of this license is in
%%    https://www.latex-project.org/lppl.txt
%% and version 1.3c or later is part of all distributions of
%% LaTeX version 2005-12-01 or later.
%%
%% Note: This package is obsolete. For LaTeX-format 2020-10-01 and newer:
%% Instead of \addglobalwarning{ something } use
%% \AddToHook{enddocument/info}{ something }
%% and do not load the warning package.
%%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{warning}[2023/03/18 v0.10 Global warnings at end of logfile]

\providecommand\IfFormatAtLeastTF{\@ifl@t@r\fmtversion}
\IfFormatAtLeastTF{2020/10/01}{
  \NewDocumentCommand\addglobalwarning{m}{\AddToHook{enddocument/info}{#1}}
  \addglobalwarning{%
    \PackageWarningNoLine{warning}{Package warning is obsolete.\MessageBreak%
      Instead of \string\addglobalwarning{ something } use \MessageBreak%
      \string\AddToHook{enddocument/info}{ something }\MessageBreak%
      and do not load the warning package}
    }
  \def\wrn@warning{\endinput}
  }{\let\wrn@warning\relax
    \AtBeginDocument{\addglobalwarning{\PackageWarningNoLine{warning}{%
      Used LaTeX-format: \fmtversion, more recent LaTeX-format is available}}}
   }

\wrn@warning% is \endinput for LaTeX since 2020-10-01 and \relax for older LaTeX.

% Define a command that adds new warnings to the list of warnings.
% Modification of the \addto command provided by babel.def.
\def\addglobalwarning#1{%
  {\toks@\expandafter{\wrn@warning#1}%
   \xdef\wrn@warning{\the\toks@}}%
}

% Expand \@dofilelist
\AtBeginDocument{%
  \let\wrn@dofilelist\@dofilelist%
  \def\@dofilelist{\wrn@dofilelist\wrn@warning}%
}
\endinput
% This works with or without \listfiles because \listfile has to be
% used in the preamble and therefor is executed before this definition.
%
% Expand \@@end command
% I have the feeling that is not too stable. Thus not used.
%\let\wrn@end\@@end
%\def\@@end{\wrn@warning\wrn@end}
%
% Expand \@refundefined command
% This does not work if undefined references appear after the execution
% of \AtEndDocument which can happen. Thus not used.
%\AtEndDocument{%
%  \let\wrn@refundefined=\@refundefined
%  \def\@refundefined{\wrn@refundefined\wrn@warning}}
%
%% EOF