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% askinclude.sty - interactive asking of included files
%
% VERSION 1.2e November 11, 1994
%
% (c) 1991 by Pablo A. Straub. Permission is granted to copy and use this
% in any way and for any purpose, except direct commercial advantage,
% provided that you retain this copyright notice.
%
% HISTORY
%
% 0.95 11/05/91 First beta-test version (asked two questions)
% 0.99 11/05/91 Second beta-test version (asks one question; uses * and -.)
% 1.0 11/07/91 Changed prompts (sent to comp.text.tex)
% 1.2e 11/02/94 Two small changes to run under LaTeX2e [RF];
% additional documentation [TRS]
%
% Please send enhancements and corrections to straub@cs.umd.edu.
%
% USAGE
%
% Here's an example root file (see pp.72--74 in the LaTeX book):
%
% % File: main.tex
% %
% \documentclass[...]{book}
% \usepackage{askinclude}
% % ^^^^^^^^^^
% % Initialization:
% \input{preamble}
% %
% \begin{document}
% %
% % Title page:
% \include{titlepg}
% %
% % Chapters:
% \include{chapter0}
% \include{chapter1}
% \include{chapter2}
% ...
% %
% \end{document}
%
% Each \include causes a page break and so askinclude probably only makes
% sense in the context of larger documents such as books.
%
% HOW IT WORKS
%
% The askinclude package asks the user which files to include. If
% the user presses return, the files from the previous run are included
% automatically (except on the first run, in which case all files are
% included); if the answer is * all files are included; if the answer
% is - no files are included; otherwise the specified files (separated
% by commas, with no embedded spaces) are included.
%
% RESTRICTIONS
%
% This file redefines \document, the command executed with \begin{document}.
% It may be incompatible with other styles that also redefine \document.
%
% The user's input is not validated. Anything that is not a * or a - or an
% empty line is passed to \includeonly.
%
% ACKNOWLEDGEMENT
%
% Tom Scavo (scavo@cie.uoregon.edu) suggested saving the include file list
% from the previous run and a simplified user interface.
\def\@includeonly{\@gobble} % assume we do not include from last run
\def\@inputs{*} % assume all files included
% determine which files to include
\def\@star{*} % constant for comparison purposes
\def\@minussign{-} % " " " "
\typeout { }
\typeout {Enter file(s) to include (separated by commas and no spaces),}
\typeout {or enter * for all files, or enter - for none, or}
\typein [\inputfiles]{press Return if this run is the same as the last.}
\ifx\inputfiles\@star % all files included
% do nothing
\else \ifx\inputfiles\@minussign % no files included
\includeonly{}
\def\@inputs{}
\else \ifx\inputfiles\empty % include according to previous run
\def\@includeonly#1{%
\gdef\@inputs{#1}
\ifx\@inputs\@star \else \global\@partswtrue\global\edef\@partlist{#1}\fi}
\else
\def\@inputs{\inputfiles} % include these files
\includeonly{\inputfiles}
\fi\fi\fi
\AtBeginDocument{\if@filesw
\immediate\write\@mainaux{\string\@includeonly\string{\@inputs
\string}}%
\def\@includeonly{}\fi}
% END OF FILE askinclude.sty
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