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+% excludeonly.sty
+% Dan Luecking <luecking@uark.edu> and Donald Arseneau <asnd@triumf.ca>
+%
+% This software is contributed to the public domain.
+%
+% Usage:
+% ~~~~~~
+% In the document preamble, "\excludeonly{aaa,bbb}" will prevent files
+% aaa.tex and bbb.tex from being typeset by \include{aaa} and \include{bbb}.
+% If both \includeonly and \excludeonly are used, then only the files
+% permitted by both declarations are used:
+% \includeonly{aaa,bbb}
+% \excludeonly{bbb,ccc}
+% results in only aaa being included.
+%
+% This behavior contradicts the name "exclude only" but the name is
+% desirable anyway to show the relationship with \includeonly.
+% In case it is actually desireable that \excludeonly lives up
+% to its name, and causes *all* parts to be included, except those
+% explicitly listed for exclusion, there is an [only] package option
+% \usepackage[only]{excludeonly}
+% The effect of this is to override any \includeonly commands.
+%
+% Conflicts:
+% ~~~~~~~~~~
+% This package redefines the internal \@include command, so it could
+% conflict with other redefinitions. Known conflicts are with document
+% classes "paper.cls" and "thesis.cls" by Wenzel Matiaske.
+% A different method for implementing \excludeonly would be to
+% redefine \@setckpt to compile a file-inclusion list (\@partlist)
+% that accounts for exclusions. Surprisingly, several packages
+% redefine \@setckpt, so this alternative would have more conflicts.
+%
+\ProvidesPackage{excludeonly}[2003/03/14 v1.0 %
+ eponymous command opposite to \string\includeonly]
+%
+\newif\if@excludesw \@excludeswfalse
+\let\ExOn@swaset\relax
+%
+\DeclareOption{only}{\let\ExOn@swaset\@tempswatrue}
+\ProcessOptions
+%
+\newcommand*{\excludeonly}[1]{%
+ \@excludeswtrue
+ \edef\@excllist{\zap@space#1 \@empty}}
+\@onlypreamble\excludeonly
+%
+\def\@include#1 {%
+ \clearpage
+ \if@filesw
+ \immediate\write\@mainaux{\string\@input{#1.aux}}%
+ \fi
+ \@tempswatrue
+ \if@partsw
+ \@tempswafalse
+ \edef\reserved@b{#1}%
+ \@for\reserved@a:=\@partlist\do
+ {\ifx\reserved@a\reserved@b\@tempswatrue\fi}%
+ \fi
+ \if@excludesw
+ \ExOn@swaset
+ \edef\reserved@b{#1}%
+ \@for\reserved@a:=\@excllist\do
+ {\ifx\reserved@a\reserved@b\@tempswafalse\fi}%
+ \fi
+ \if@tempswa
+ \let\@auxout\@partaux
+ \if@filesw
+ \immediate\openout\@partaux #1.aux
+ \immediate\write\@partaux{\relax}%
+ \fi
+ \@input@{#1.tex}%
+ \clearpage
+ \@writeckpt{#1}%
+ \if@filesw
+ \immediate\closeout\@partaux
+ \fi
+ \else
+ \deadcycles\z@
+ \@nameuse{cp@#1}%
+ \fi
+ \let\@auxout\@mainaux}
+\endinput