new generic package ifetex (31oct11)

git-svn-id: svn://tug.org/texlive/trunk@24502 c570f23f-e606-0410-a88d-b1316a301751

2 files changed, 162 insertions, 0 deletions

diff --git a/Master/texmf-dist/source/latex/ifetex/ifetex.dtx b/Master/texmf-dist/source/latex/ifetex/ifetex.dtx
new file mode 100644
index 00000000000..dac7c1fe434
--- /dev/null
+++ b/Master/texmf-dist/source/latex/ifetex/ifetex.dtx
@@ -0,0 +1,151 @@
+% \iffalse meta-comment
+%<=*COPYRIGHT>
+%% Copyright (C) 2011 by Martin Scharrer <martin@scharrer.me>
+%% ---------------------------------------------------------------------------
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `maintained'.
+%%
+%% The Current Maintainer of this work is Martin Scharrer.
+%%
+%% This work consists of the files ifetex.dtx and ifetex.ins
+%% and the derived filebase ifetex.sty.
+%%
+%<=/COPYRIGHT>
+% \fi
+%
+% \iffalse
+%<*driver>
+\ProvidesFile{ifetex.dtx}[%
+%<=*DATE>
+    2011/10/31
+%<=/DATE>
+%<=*VERSION>
+    v1.0
+%<=/VERSION>
+    Conditional to test for e-TeX]
+\documentclass{ydoc}
+\GetFileInfo{ifetex.dtx}
+\usepackage{ifetex}[\filedate]
+\EnableCrossrefs
+\CodelineIndex
+\RecordChanges
+\begin{document}
+  \DocInput{\jobname.dtx}
+  \PrintChanges
+  \PrintIndex
+\end{document}
+%</driver>
+% \fi
+%
+% \CheckSum{32}
+%
+% \CharacterTable
+%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%   Digits        \0\1\2\3\4\5\6\7\8\9
+%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%   Dollar        \$     Percent       \%     Ampersand     \&
+%   Acute accent  \'     Left paren    \(     Right paren   \)
+%   Asterisk      \*     Plus          \+     Comma         \,
+%   Minus         \-     Point         \.     Solidus       \/
+%   Colon         \:     Semicolon     \;     Less than     \<
+%   Equals        \=     Greater than  \>     Question mark \?
+%   Commercial at \@     Left bracket  \[     Backslash     \\
+%   Right bracket \]     Circumflex    \^     Underscore    \_
+%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%   Right brace   \}     Tilde         \~}
+%
+%
+% \changes{v1.0}{2011/10/31}{First version.}
+%
+% \DoNotIndex{\newcommand,\newenvironment}
+%
+% \GetFileInfo{ifetex.dtx}
+% \author{Martin Scharrer}
+% \email{martin@scharrer.me}
+% \ifdefined\repository
+%   \repository{https://bitbucket.org/martin_scharrer/ifetex}
+% \fi
+%
+% \maketitle
+%
+% \providecommand\eTeX{$\epsilon$-\TeX}
+% \begin{abstract}\noindent
+% This small package provides the if-switch \Macro\ifetex which
+% indicated whether \eTeX\ is available or not.
+% \end{abstract}
+%
+% \section{Usage}
+% The package can be loaded as \LaTeX\ package using \Macro\usepackage{ifetex} or in plain\TeX\ using \Macro\input' ifetex'.
+% In both cases it aborts silently if the \Macro\ifetex macro is already defined.
+%
+% The package currently test if \Macro\eTeXversion is defined as a primitive and assumes \eTeX\ if so.
+%
+% \StopEventually{}
+% \section{Implementation}
+%
+% \subsection{\texttt{ifetex.sty}}
+% \iffalse
+%<*ifetex.sty>
+% \fi
+%    \begin{macrocode}
+%<!COPYRIGHT>
+\ProvidesPackage{ifetex}[%
+%<!DATE>
+%<!VERSION>
+%<*DRIVER>
+    2099/01/01 develop
+%</DRIVER>
+    ifetex]
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+\@@input ifetex
+%    \end{macrocode}
+% \iffalse
+%</ifetex.sty>
+% \fi
+%
+% \subsection{\texttt{ifetex.tex}}
+% \iffalse
+%<*ifetex.tex>
+% \fi
+%    \begin{macrocode}
+%<!COPYRIGHT>
+%    \end{macrocode}
+%
+% Abort if \Macro{ifetex} is already defined.
+%    \begin{macrocode}
+\expandafter\ifx\csname ifetex\endcsname\relax\else
+    \expandafter\endinput
+\fi
+%    \end{macrocode}
+%
+% \begin{macro}{ifetex}
+% Checks if \Macro\eTeXversion is a primitive.
+%    \begin{macrocode}
+\newif\ifetex
+\begingroup
+\edef\tempa{\meaning\eTeXversion}%
+\edef\tempb{\string\eTeXversion}%
+\ifx\tempa\tempb
+    \global\etextrue
+\else
+    \global\etexfalse
+\fi
+\endgroup
+%    \end{macrocode}
+% \end{macro}
+% \iffalse
+%</ifetex.tex>
+% \fi
+%
+% \Finale
+\endinput
diff --git a/Master/texmf-dist/source/latex/ifetex/ifetex.ins b/Master/texmf-dist/source/latex/ifetex/ifetex.ins
new file mode 100644
index 00000000000..8b3e6d5038d
--- /dev/null
+++ b/Master/texmf-dist/source/latex/ifetex/ifetex.ins
@@ -0,0 +1,11 @@
+\input ydocstrip.tex
+\keepsilent
+\askforoverwritefalse
+
+\generate{%
+  \file{ifetex.sty}{\nopreamble\from{ifetex.dtx}{ifetex.sty}}%
+  \file{ifetex.tex}{\nopreamble\from{ifetex.dtx}{ifetex.tex}}%
+}
+\endbatchfile
+
+%% vim: ft=tex