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authorNorbert Preining <norbert@preining.info>2019-12-05 03:00:50 +0000
committerNorbert Preining <norbert@preining.info>2019-12-05 03:00:50 +0000
commit2905ee4c8de47cfdeea4787e465eb827f9b99e8b (patch)
tree802c26d7002fd7e2188412b5bd1f86cd9ee2c4d6 /macros/latex/contrib/letltxmacro
parent05ad7831f64aa0e2fc9eac63816eeafcb0b09708 (diff)
CTAN sync 201912050300
Diffstat (limited to 'macros/latex/contrib/letltxmacro')
-rw-r--r--macros/latex/contrib/letltxmacro/README.md12
-rw-r--r--macros/latex/contrib/letltxmacro/letltxmacro.dtx825
-rw-r--r--macros/latex/contrib/letltxmacro/letltxmacro.pdfbin0 -> 290791 bytes
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diff --git a/macros/latex/contrib/letltxmacro/README.md b/macros/latex/contrib/letltxmacro/README.md
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+++ b/macros/latex/contrib/letltxmacro/README.md
@@ -0,0 +1,12 @@
+# letltxmacro
+
+letltxmacro package for LaTeX
+
+
+TeX's \let assignment does not work for LaTeX macros
+with optional arguments or for macros that are defined
+as robust macros by \DeclareRobustCommand. This package
+defines \LetLtxMacro that also takes care of the involved
+internal macros.
+
+
diff --git a/macros/latex/contrib/letltxmacro/letltxmacro.dtx b/macros/latex/contrib/letltxmacro/letltxmacro.dtx
new file mode 100644
index 0000000000..76cb23cd9f
--- /dev/null
+++ b/macros/latex/contrib/letltxmacro/letltxmacro.dtx
@@ -0,0 +1,825 @@
+% \iffalse meta-comment
+%
+% File: letltxmacro.dtx
+% Version: 2019/12/03 v1.6
+% Info: Let assignment for LaTeX macros
+%
+% Copyright (C)
+% 2008, 2010 Heiko Oberdiek
+% 2016-2019 Oberdiek Package Support Group
+% https://github.com/ho-tex/letltxmacro/issues
+%
+% 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 1.3 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 Maintainers of this work are
+% Heiko Oberdiek and the Oberdiek Package Support Group
+% https://github.com/ho-tex/letltxmacro/issues
+%
+% This work consists of the main source file letltxmacro.dtx
+% and the derived files
+% letltxmacro.sty, letltxmacro.pdf, letltxmacro.ins, letltxmacro.drv,
+% letltxmacro-showcases.tex, letltxmacro-test1.tex,
+% letltxmacro-test2.tex.
+%
+% Distribution:
+% CTAN:macros/latex/contrib/letltxmacro/letltxmacro.dtx
+% CTAN:macros/latex/contrib/letltxmacro/letltxmacro.pdf
+%
+% Unpacking:
+% (a) If letltxmacro.ins is present:
+% tex letltxmacro.ins
+% (b) Without letltxmacro.ins:
+% tex letltxmacro.dtx
+% (c) If you insist on using LaTeX
+% latex \let\install=y\input{letltxmacro.dtx}
+% (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+% (a) If letltxmacro.drv is present:
+% latex letltxmacro.drv
+% (b) Without letltxmacro.drv:
+% latex letltxmacro.dtx; ...
+% The class ltxdoc loads the configuration file ltxdoc.cfg
+% if available. Here you can specify further options, e.g.
+% use A4 as paper format:
+% \PassOptionsToClass{a4paper}{article}
+%
+% Programm calls to get the documentation (example):
+% pdflatex letltxmacro.dtx
+% makeindex -s gind.ist letltxmacro.idx
+% pdflatex letltxmacro.dtx
+% makeindex -s gind.ist letltxmacro.idx
+% pdflatex letltxmacro.dtx
+%
+% Installation:
+% TDS:tex/latex/letltxmacro/letltxmacro.sty
+% TDS:doc/latex/letltxmacro/letltxmacro.pdf
+% TDS:doc/latex/letltxmacro/letltxmacro-showcases.tex
+% TDS:source/latex/letltxmacro/letltxmacro.dtx
+%
+%<*ignore>
+\begingroup
+ \catcode123=1 %
+ \catcode125=2 %
+ \def\x{LaTeX2e}%
+\expandafter\endgroup
+\ifcase 0\ifx\install y1\fi\expandafter
+ \ifx\csname processbatchFile\endcsname\relax\else1\fi
+ \ifx\fmtname\x\else 1\fi\relax
+\else\csname fi\endcsname
+%</ignore>
+%<*install>
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: letltxmacro 2019/12/03 v1.6 Let assignment for LaTeX macros (HO)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+Project: letltxmacro
+Version: 2019/12/03 v1.6
+
+Copyright (C)
+ 2008, 2010 Heiko Oberdiek
+ 2016-2019 Oberdiek Package Support Group
+
+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 1.3 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 Maintainers of this work are
+Heiko Oberdiek and the Oberdiek Package Support Group
+https://github.com/ho-tex/letltxmacro/issues
+
+
+This work consists of the main source file letltxmacro.dtx
+and the derived files
+ letltxmacro.sty, letltxmacro.pdf, letltxmacro.ins, letltxmacro.drv,
+ letltxmacro-showcases.tex, letltxmacro-test1.tex,
+ letltxmacro-test2.tex.
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+ \file{letltxmacro.ins}{\from{letltxmacro.dtx}{install}}%
+ \file{letltxmacro.drv}{\from{letltxmacro.dtx}{driver}}%
+ \usedir{tex/latex/letltxmacro}%
+ \file{letltxmacro.sty}{\from{letltxmacro.dtx}{package}}%
+ \usedir{doc/latex/letltxmacro}%
+ \file{letltxmacro-showcases.tex}{\from{letltxmacro.dtx}{showcases}}%
+% \usedir{doc/latex/letltxmacro/test}%
+% \file{letltxmacro-test1.tex}{\from{letltxmacro.dtx}{test1}}%
+% \file{letltxmacro-test2.tex}{\from{letltxmacro.dtx}{test2}}%
+}
+
+\catcode32=13\relax% active space
+\let =\space%
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{* letltxmacro.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `letltxmacro.drv'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesFile{letltxmacro.drv}%
+ [2019/12/03 v1.6 Let assignment for LaTeX macros (HO)]%
+\documentclass{ltxdoc}
+\usepackage{holtxdoc}[2011/11/22]
+\begin{document}
+ \DocInput{letltxmacro.dtx}%
+\end{document}
+%</driver>
+% \fi
+%
+%
+%
+% \GetFileInfo{letltxmacro.drv}
+%
+% \title{The \xpackage{letltxmacro} package}
+% \date{2019/12/03 v1.6}
+% \author{Heiko Oberdiek\thanks
+% {Please report any issues at \url{https://github.com/ho-tex/letltxmacro/issues}}}
+%
+% \maketitle
+%
+% \begin{abstract}
+% \TeX's \cs{let} assignment does not work for \LaTeX\ macros
+% with optional arguments or for macros that are defined
+% as robust macros by \cs{DeclareRobustCommand}. This package
+% defines \cs{LetLtxMacro} that also takes care of the involved
+% internal macros.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \section{Documentation}
+%
+% If someone wants to redefine a macro with using the old
+% meaning, then one method is \TeX's command \cs{let}:
+%\begin{quote}
+%\begin{verbatim}
+%\newcommand{\Macro}{\typeout{Test Macro}}
+%\let\SavedMacro=\Macro
+%\renewcommand{\Macro}{%
+% \typeout{Begin}%
+% \SavedMacro
+% \typeout{End}%
+%}
+%\end{verbatim}
+%\end{quote}
+% However, this method fails, if \cs{Macro} is defined
+% by \cs{DeclareRobustCommand} and/or has an optional argument.
+% In both cases \LaTeX\ defines an additional internal macro
+% that is forgotten in the simple \cs{let} assignment of
+% the example above.
+%
+% \begin{declcs}{LetLtxMacro} \M{new macro} \M{old macro}
+% \end{declcs}
+% Macro \cs{LetLtxMacro} behaves similar to \TeX's \cs{let}
+% assignment, but it takes care of macros that are
+% defined by \cs{DeclareRobustCommand} and/or have optional
+% arguments. Example:
+%\begin{quote}
+%\begin{verbatim}
+%\DeclareRobustCommand{\Macro}[1][default]{...}
+%\LetLtxMacro{\SavedMacro}{\Macro}
+%\end{verbatim}
+%\end{quote}
+% Then macro \cs{SavedMacro} only uses internal macro names
+% that are derived from \cs{SavedMacro}'s macro name. Macro \cs{Macro}
+% can now be redefined without affecting \cs{SavedMacro}.
+%
+% \begin{declcs}{GlobalLetLtxMacro} \M{new macro} \M{old macro}
+% \end{declcs}
+% Like \cs{LetLtxMacro}, but the \meta{new macro} is defined globally.
+% Since version 2019/12/03~v1.4.
+%
+% \subsection{Supported macro definition commands}
+%
+% \begin{quote}
+% \begin{tabular}{@{}ll@{}}
+% \cs{newcommand}, \cs{renewcommand} & latex/base\\
+% \cs{newenvironment}, \cs{renewenvironment} & latex/base\\
+% \cs{DeclareRobustCommand}& latex/base\\
+% \cs{newrobustcmd}, \cs{renewrobustcmd} & etoolbox\\
+% \cs{robustify} & etoolbox 2008/06/22 v1.6\\
+% \end{tabular}
+% \end{quote}
+%
+% \StopEventually{
+% }
+%
+% \section{Implementation}
+%
+% \subsection{Show cases}
+%
+% \subsubsection{\xfile{letltxmacro-showcases.tex}}
+%
+% \begin{macrocode}
+%<*showcases>
+\NeedsTeXFormat{LaTeX2e}
+\makeatletter
+% \end{macrocode}
+% \begin{macro}{\Line}
+% The result is displayed by macro \cs{Line}. The percent symbol
+% at line start allows easy grepping and inserting into the DTX
+% file.
+% \begin{macrocode}
+\newcommand*{\Line}[1]{%
+ \typeout{\@percentchar#1}%
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macrocode}
+\newcommand*{\ShowCmdName}[1]{%
+ \@ifundefined{#1}{}{%
+ \Line{%
+ \space\space(\expandafter\string\csname#1\endcsname) = %
+ (\expandafter\meaning\csname#1\endcsname)%
+ }%
+ }%
+}
+\newcommand*{\ShowCmds}[1]{%
+ \ShowCmdName{#1}%
+ \ShowCmdName{#1 }%
+ \ShowCmdName{\\#1}%
+ \ShowCmdName{\\#1 }%
+}
+\let\\\@backslashchar
+% \end{macrocode}
+% \begin{macro}{\ShowDef}
+% \begin{macrocode}
+\newcommand*{\ShowDef}[2]{%
+ \begingroup
+ \Line{}%
+ \newcommand*{\DefString}{#2}%
+ \@onelevel@sanitize\DefString
+ \Line{\DefString}%
+ #2%
+ \ShowCmds{#1}%
+ \endgroup
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macrocode}
+\typeout{}
+\Line{* LaTeX definitions:}
+\ShowDef{cmd}{%
+ \newcommand{\cmd}[2][default]{}%
+}
+\ShowDef{cmd}{%
+ \DeclareRobustCommand{\cmd}{}%
+}
+\ShowDef{cmd}{%
+ \DeclareRobustCommand{\cmd}[2][default]{}%
+}
+\typeout{}
+% \end{macrocode}
+% The minimal version of package \xpackage{etoolbox} is 2008/06/12 v1.6a
+% because it fixes \cs{robustify}.
+% \begin{macrocode}
+\RequirePackage{etoolbox}[2008/06/12]%
+\Line{}
+\Line{* etoolbox's robust definitions:}
+\ShowDef{cmd}{%
+ \newrobustcmd{\cmd}{}%
+}
+\ShowDef{cmd}{%
+ \newrobustcmd{\cmd}[2][default]{}%
+}
+\Line{}
+\Line{* etoolbox's \string\robustify:}
+\ShowDef{cmd}{%
+ \newcommand{\cmd}[2][default]{} %
+ \robustify{\cmd}%
+}
+\ShowDef{cmd}{%
+ \DeclareRobustCommand{\cmd}{} %
+ \robustify{\cmd}%
+}
+\ShowDef{cmd}{%
+ \DeclareRobustCommand{\cmd}[2][default]{} %
+ \robustify{\cmd}%
+}
+\typeout{}
+\@@end
+%</showcases>
+% \end{macrocode}
+%
+% \subsubsection{Result}
+%
+% \begingroup
+% \makeatletter
+% \let\org@verbatim\@verbatim
+% \def\@verbatim{^^A
+% \org@verbatim
+% \catcode`\~=\active
+% }^^A
+% \let~\textvisiblespace
+%\begin{verbatim}
+%* LaTeX definitions:
+%
+%\newcommand {\cmd }[2][default]{}
+% (\cmd) = (macro:->\@protected@testopt \cmd \\cmd {default})
+% (\\cmd) = (\long macro:[#1]#2->)
+%
+%\DeclareRobustCommand {\cmd }{}
+% (\cmd) = (macro:->\protect \cmd~ )
+% (\cmd~) = (\long macro:->)
+%
+%\DeclareRobustCommand {\cmd }[2][default]{}
+% (\cmd) = (macro:->\protect \cmd~ )
+% (\cmd~) = (macro:->\@protected@testopt \cmd~ \\cmd~ {default})
+% (\\cmd~) = (\long macro:[#1]#2->)
+%
+%* etoolbox's robust definitions:
+%
+%\newrobustcmd {\cmd }{}
+% (\cmd) = (\protected\long macro:->)
+%
+%\newrobustcmd {\cmd }[2][default]{}
+% (\cmd) = (\protected macro:->\@testopt \\cmd {default})
+% (\\cmd) = (\long macro:[#1]#2->)
+%
+%* etoolbox's \robustify:
+%
+%\newcommand {\cmd }[2][default]{} \robustify {\cmd }
+% (\cmd) = (\protected macro:->\@protected@testopt \cmd \\cmd {default})
+% (\\cmd) = (\long macro:[#1]#2->)
+%
+%\DeclareRobustCommand {\cmd }{} \robustify {\cmd }
+% (\cmd) = (\protected macro:->)
+%
+%\DeclareRobustCommand {\cmd }[2][default]{} \robustify {\cmd }
+% (\cmd) = (\protected macro:->\@protected@testopt \cmd~ \\cmd~ {default})
+% (\cmd~) = (macro:->\@protected@testopt \cmd~ \\cmd~ {default})
+% (\\cmd~) = (\long macro:[#1]#2->)
+%\end{verbatim}
+% \endgroup
+%
+% \subsection{Package}
+%
+% \begin{macrocode}
+%<*package>
+% \end{macrocode}
+%
+% \subsubsection{Catcodes and identification}
+%
+% \begin{macrocode}
+\begingroup\catcode61\catcode48\catcode32=10\relax%
+ \catcode13=5 % ^^M
+ \endlinechar=13 %
+ \catcode123=1 % {
+ \catcode125=2 % }
+ \catcode64=11 % @
+ \def\x{\endgroup
+ \expandafter\edef\csname llm@AtEnd\endcsname{%
+ \endlinechar=\the\endlinechar\relax
+ \catcode13=\the\catcode13\relax
+ \catcode32=\the\catcode32\relax
+ \catcode35=\the\catcode35\relax
+ \catcode61=\the\catcode61\relax
+ \catcode64=\the\catcode64\relax
+ \catcode123=\the\catcode123\relax
+ \catcode125=\the\catcode125\relax
+ }%
+ }%
+\x\catcode61\catcode48\catcode32=10\relax%
+\catcode13=5 % ^^M
+\endlinechar=13 %
+\catcode35=6 % #
+\catcode64=11 % @
+\catcode123=1 % {
+\catcode125=2 % }
+\def\TMP@EnsureCode#1#2{%
+ \edef\llm@AtEnd{%
+ \llm@AtEnd
+ \catcode#1=\the\catcode#1\relax
+ }%
+ \catcode#1=#2\relax
+}
+\TMP@EnsureCode{40}{12}% (
+\TMP@EnsureCode{41}{12}% )
+\TMP@EnsureCode{42}{12}% *
+\TMP@EnsureCode{45}{12}% -
+\TMP@EnsureCode{46}{12}% .
+\TMP@EnsureCode{47}{12}% /
+\TMP@EnsureCode{58}{12}% :
+\TMP@EnsureCode{62}{12}% >
+\TMP@EnsureCode{91}{12}% [
+\TMP@EnsureCode{93}{12}% ]
+\edef\llm@AtEnd{%
+ \llm@AtEnd
+ \escapechar\the\escapechar\relax
+ \noexpand\endinput
+}
+\escapechar=92 % `\\
+% \end{macrocode}
+%
+% Package identification.
+% \begin{macrocode}
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{letltxmacro}%
+ [2019/12/03 v1.6 Let assignment for LaTeX macros (HO)]
+% \end{macrocode}
+%
+% \subsubsection{Main macros}
+%
+% \begin{macro}{\LetLtxMacro}
+% \begin{macrocode}
+\newcommand*{\LetLtxMacro}{%
+ \llm@ModeLetLtxMacro{}%
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\GlobalLetLtxMacro}
+% \begin{macrocode}
+\newcommand*{\GlobalLetLtxMacro}{%
+ \llm@ModeLetLtxMacro\global
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\llm@ModeLetLtxMacro}
+% \begin{macrocode}
+\newcommand*{\llm@ModeLetLtxMacro}[3]{%
+ \edef\llm@escapechar{\the\escapechar}%
+ \escapechar=-1 %
+ \edef\reserved@a{%
+ \noexpand\protect
+ \expandafter\noexpand
+ \csname\string#3 \endcsname
+ }%
+ \ifx\reserved@a#3\relax
+ #1\edef#2{%
+ \noexpand\protect
+ \expandafter\noexpand
+ \csname\string#2 \endcsname
+ }%
+ #1\expandafter\let
+ \csname\string#2 \expandafter\endcsname
+ \csname\string#3 \endcsname
+ \expandafter\llm@LetLtxMacro
+ \csname\string#2 \expandafter\endcsname
+ \csname\string#3 \endcsname{#1}%
+ \else
+ \llm@LetLtxMacro{#2}{#3}{#1}%
+ \fi
+ \escapechar=\llm@escapechar\relax
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\llm@LetLtxMacro}
+% \begin{macrocode}
+\def\llm@LetLtxMacro#1#2#3{%
+ \escapechar=92 %
+ \expandafter\llm@CheckParams\meaning#2:->\@nil{%
+ \begingroup
+ \def\@protected@testopt{%
+ \expandafter\@testopt\@gobble
+ }%
+ \def\@testopt##1##2{%
+ \toks@={##2}%
+ }%
+ \let\llm@testopt\@empty
+ \edef\x{%
+ \noexpand\@protected@testopt
+ \noexpand#2%
+ \expandafter\noexpand\csname\string#2\endcsname
+ }%
+ \expandafter\expandafter\expandafter\def
+ \expandafter\expandafter\expandafter\y
+ \expandafter\expandafter\expandafter{%
+ \expandafter\llm@CarThree#2{}{}{}\llm@nil
+ }%
+ \ifx\x\y
+ #2%
+ \def\llm@testopt{%
+ \noexpand\@protected@testopt
+ \noexpand#1%
+ }%
+ \else
+ \edef\x{%
+ \noexpand\@testopt
+ \expandafter\noexpand
+ \csname\string#2\endcsname
+ }%
+ \expandafter\expandafter\expandafter\def
+ \expandafter\expandafter\expandafter\y
+ \expandafter\expandafter\expandafter{%
+ \expandafter\llm@CarTwo#2{}{}\llm@nil
+ }%
+ \ifx\x\y
+ #2%
+ \def\llm@testopt{%
+ \noexpand\@testopt
+ }%
+ \fi
+ \fi
+ \ifx\llm@testopt\@empty
+ \else
+ \llm@protected\xdef\llm@GlobalTemp{%
+ \llm@testopt
+ \expandafter\noexpand
+ \csname\string#1\endcsname
+ {\the\toks@}%
+ }%
+ \fi
+ \expandafter\endgroup\ifx\llm@testopt\@empty
+ #3\let#1=#2\relax
+ \else
+ #3\let#1=\llm@GlobalTemp
+ #3\expandafter\let
+ \csname\string#1\expandafter\endcsname
+ \csname\string#2\endcsname
+ \fi
+ }{%
+ #3\let#1=#2\relax
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\llm@CheckParams}
+% \begin{macrocode}
+\def\llm@CheckParams#1:->#2\@nil{%
+ \begingroup
+ \def\x{#1}%
+ \ifx\x\llm@macro
+ \endgroup
+ \def\llm@protected{}%
+ \expandafter\@firstoftwo
+ \else
+ \ifx\x\llm@protectedmacro
+ \endgroup
+ \def\llm@protected{\protected}%
+ \expandafter\expandafter\expandafter\@firstoftwo
+ \else
+ \endgroup
+ \expandafter\expandafter\expandafter\@secondoftwo
+ \fi
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\llm@macro}
+% \begin{macrocode}
+\def\llm@macro{macro}
+\@onelevel@sanitize\llm@macro
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\llm@protectedmacro}
+% \begin{macrocode}
+\def\llm@protectedmacro{\protected macro}
+\@onelevel@sanitize\llm@protectedmacro
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\llm@CarThree}
+% \begin{macrocode}
+\def\llm@CarThree#1#2#3#4\llm@nil{#1#2#3}%
+% \end{macrocode}
+% \end{macro}
+% \begin{macro}{\llm@CarTwo}
+% \begin{macrocode}
+\def\llm@CarTwo#1#2#3\llm@nil{#1#2}%
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macrocode}
+\llm@AtEnd%
+%</package>
+% \end{macrocode}
+% \section{Installation}
+%
+% \subsection{Download}
+%
+% \paragraph{Package.} This package is available on
+% CTAN\footnote{\CTANpkg{letltxmacro}}:
+% \begin{description}
+% \item[\CTAN{macros/latex/contrib/letltxmacro/letltxmacro.dtx}] The source file.
+% \item[\CTAN{macros/latex/contrib/letltxmacro/letltxmacro.pdf}] Documentation.
+% \end{description}
+%
+%
+% \paragraph{Bundle.} All the packages of the bundle `letltxmacro'
+% are also available in a TDS compliant ZIP archive. There
+% the packages are already unpacked and the documentation files
+% are generated. The files and directories obey the TDS standard.
+% \begin{description}
+% \item[\CTANinstall{install/macros/latex/contrib/letltxmacro.tds.zip}]
+% \end{description}
+% \emph{TDS} refers to the standard ``A Directory Structure
+% for \TeX\ Files'' (\CTANpkg{tds}). Directories
+% with \xfile{texmf} in their name are usually organized this way.
+%
+% \subsection{Bundle installation}
+%
+% \paragraph{Unpacking.} Unpack the \xfile{letltxmacro.tds.zip} in the
+% TDS tree (also known as \xfile{texmf} tree) of your choice.
+% Example (linux):
+% \begin{quote}
+% |unzip letltxmacro.tds.zip -d ~/texmf|
+% \end{quote}
+%
+% \subsection{Package installation}
+%
+% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
+% \docstrip\ archive. The files are extracted by running the
+% \xfile{.dtx} through \plainTeX:
+% \begin{quote}
+% \verb|tex letltxmacro.dtx|
+% \end{quote}
+%
+% \paragraph{TDS.} Now the different files must be moved into
+% the different directories in your installation TDS tree
+% (also known as \xfile{texmf} tree):
+% \begin{quote}
+% \def\t{^^A
+% \begin{tabular}{@{}>{\ttfamily}l@{ $\rightarrow$ }>{\ttfamily}l@{}}
+% letltxmacro.sty & tex/latex/letltxmacro/letltxmacro.sty\\
+% letltxmacro.pdf & doc/latex/letltxmacro/letltxmacro.pdf\\
+% letltxmacro-showcases.tex & doc/latex/letltxmacro/letltxmacro-showcases.tex\\
+% letltxmacro.dtx & source/latex/letltxmacro/letltxmacro.dtx\\
+% \end{tabular}^^A
+% }^^A
+% \sbox0{\t}^^A
+% \ifdim\wd0>\linewidth
+% \begingroup
+% \advance\linewidth by\leftmargin
+% \advance\linewidth by\rightmargin
+% \edef\x{\endgroup
+% \def\noexpand\lw{\the\linewidth}^^A
+% }\x
+% \def\lwbox{^^A
+% \leavevmode
+% \hbox to \linewidth{^^A
+% \kern-\leftmargin\relax
+% \hss
+% \usebox0
+% \hss
+% \kern-\rightmargin\relax
+% }^^A
+% }^^A
+% \ifdim\wd0>\lw
+% \sbox0{\small\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\footnotesize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\scriptsize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\tiny\t}^^A
+% \ifdim\wd0>\linewidth
+% \lwbox
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \end{quote}
+% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
+% TDS installing feature, then some files can already be in the right
+% place, see the documentation of \docstrip.
+%
+% \subsection{Refresh file name databases}
+%
+% If your \TeX~distribution
+% (\TeX\,Live, \mikTeX, \dots) relies on file name databases, you must refresh
+% these. For example, \TeX\,Live\ users run \verb|texhash| or
+% \verb|mktexlsr|.
+%
+% \subsection{Some details for the interested}
+%
+% \paragraph{Unpacking with \LaTeX.}
+% The \xfile{.dtx} chooses its action depending on the format:
+% \begin{description}
+% \item[\plainTeX:] Run \docstrip\ and extract the files.
+% \item[\LaTeX:] Generate the documentation.
+% \end{description}
+% If you insist on using \LaTeX\ for \docstrip\ (really,
+% \docstrip\ does not need \LaTeX), then inform the autodetect routine
+% about your intention:
+% \begin{quote}
+% \verb|latex \let\install=y\input{letltxmacro.dtx}|
+% \end{quote}
+% Do not forget to quote the argument according to the demands
+% of your shell.
+%
+% \paragraph{Generating the documentation.}
+% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
+% the documentation. The process can be configured by the
+% configuration file \xfile{ltxdoc.cfg}. For instance, put this
+% line into this file, if you want to have A4 as paper format:
+% \begin{quote}
+% \verb|\PassOptionsToClass{a4paper}{article}|
+% \end{quote}
+% An example follows how to generate the
+% documentation with pdf\LaTeX:
+% \begin{quote}
+%\begin{verbatim}
+%pdflatex letltxmacro.dtx
+%makeindex -s gind.ist letltxmacro.idx
+%pdflatex letltxmacro.dtx
+%makeindex -s gind.ist letltxmacro.idx
+%pdflatex letltxmacro.dtx
+%\end{verbatim}
+% \end{quote}
+%
+% \begin{History}
+% \begin{Version}{2008/06/09 v1.0}
+% \item
+% First version.
+% \end{Version}
+% \begin{Version}{2008/06/12 v1.1}
+% \item
+% Support for \xpackage{etoolbox}'s \cs{newrobustcmd} added.
+% \end{Version}
+% \begin{Version}{2008/06/13 v1.2}
+% \item
+% Support for \xpackage{etoolbox}'s \cs{robustify} added.
+% \end{Version}
+% \begin{Version}{2008/06/24 v1.3}
+% \item
+% Test file adapted for etoolbox 2008/06/22 v1.6.
+% \end{Version}
+% \begin{Version}{2010/09/02 v1.4}
+% \item
+% \cs{GlobalLetLtxMacro} added.
+% \end{Version}
+% \begin{Version}{2016/05/16 v1.5}
+% \item
+% Documentation updates.
+% \end{Version}
+% \begin{Version}{2019/12/03 v1.6}
+% \item
+% Documentation updates.
+% \end{Version}
+% \end{History}
+%
+% \PrintIndex
+%
+% \Finale
+\endinput
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