I have studied Will Robertson's DTXGALLERY examples and now have my package set up as a bundle consisting of three packages. Each package's code lives in separate dtx files, two of which are imported by one. When I process the main dtx file (that imports the other two) the source code listings are numbered consecutively throughout the entire documentation. In Robertson's dtxgallery.dtx and dtxgallery.pdf example, I see source code listings that reset with each listing, and that is what I would like to do. I don't see anything obvious in the dtxgallery.dtx file that does this and I can't seem to find anything about it on this site. Note that I'm using the tcolorbox documentation library so that may have something to do with it.
Here are my MWE files. The first one is joe.dtx and is the one that imports the other two. (Note that these are whittled down from a 5100+ line project and are still a bit large and I didn't really want to have to post them but I figured I would just to avoid the ubiquitous request for a MWE so please don't castigate me for doing so!)
% \iffalse meta-comment
% !TEX program = lualatexmk
%
% Copyright (C) 2021 by Paul J. Heafner <heafnerj@gmail.com>
% ---------------------------------------------------------------------------
% 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 Paul J. Heafner.
%
% This work consists of the files joe.dtx
% joeone.dtx
% joetwo.dtx
% joe.ins
% joe.pdf
% README.md
%
% and includes the derived files joe.sty
% joeone.sty
% joetwo.sty
% ---------------------------------------------------------------------------
%
% \fi
%
% \iffalse
%
%<*internal>
\iffalse
%</internal>
%
%<*readme>
joe provides a sample package bundle. To install, open a command
line and type the following, repeating 2-4 until there are no warnings:
1. lualatex joe.ins (can also use latex)
2. lualatex joe.dtx (lualatex is required)
3. makeindex -s gind.ist -o joe.ind joe.idx
4. makeindex -s gglo.ist -o joe.gls joe.glo
Move the *.sty files into a directory searched by TeX.
%</readme>
%
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
\expandafter\begingroup
\fi
%</internal>
%
%<*install>
\input docstrip.tex
\keepsilent
\askforoverwritefalse
\usedir{tex/latex/joe}
\preamble
Copyright (C) 2021 by Paul J. Heafner <heafnerj@gmail.com>
---------------------------------------------------------------------------
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 Paul J. Heafner.
This work consists of the files joe.dtx
joeone.dtx
joetwo.dtx
joe.ins
joe.pdf
README.md
and includes the derived files joe.sty
joeone.sty
joetwo.sty
---------------------------------------------------------------------------
\endpreamble
\generate{\usepreamble\empty\usepostamble\empty
\file{README.md}{\from{\jobname.dtx}{readme}}}
\generate{\file{\jobname.ins}{\from{\jobname.dtx}{install}}}
\generate{\file{\jobname.sty}{\from{\jobname.dtx}{package}}}
\generate{\file{joeone.sty}{\from{joeone.dtx}{package}}}
\generate{\file{joetwo.sty}{\from{joetwo.dtx}{package}}}
\obeyspaces
\Msg{*************************************************************}
\Msg{* *}
\Msg{* To finish the installation, open a command line and *}
\Msg{* type the following, repeating 2-4 until there are no *}
\Msg{* warnings: *}
\Msg{* 2. lualatex joe.dtx (lualatex is required) *}
\Msg{* 3. makeindex -s gind.ist -o joe.ind joe.idx *}
\Msg{* 4. makeindex -s gglo.ist -o joe.gls joe.glo *}
\Msg{* Move the *.sty files into a directory searched by TeX. *}
\Msg{* *}
\Msg{*************************************************************}
%</install>
%<install>\endbatchfile
%
%<*internal>
\usedir{tex/latex/joe}
\generate{\usepreamble\empty\usepostamble\empty
\file{README.md}{\from{\jobname.dtx}{readme}}}
\generate{\file{\jobname.ins}{\from{\jobname.dtx}{install}}}
\generate{\file{\jobname.sty}{\from{\jobname.dtx}{package}}}
\generate{\file{joeone.sty}{\from{joeone.dtx}{package}}}
\generate{\file{joetwo.sty}{\from{joetwo.dtx}{package}}}
\ifx\fmtname\nameofplainTeX
\expandafter\endbatchfile
\else
\expandafter\endgroup
\fi
%</internal>
%
%<*driver>
\ProvidesFile{joe.dtx}
%</driver>
%
%<*driver>
\documentclass[10pt]{ltxdoc}
\PassOptionsToPackage{listings,documentation}{tcolorbox} % prevent option clash
\usepackage{\jobname} % load joe.sty
\usepackage{joeone} % load joeone.sty
\usepackage{joetwo} % load joetwo.sty
\usepackage{mwe} % provides test images
\usepackage[left = 1.00in,% %
right = 1.00in,% %
marginparwidth = 0.70in]{geometry} % main documentation
\usepackage[listings,documentation]{tcolorbox} % workhorse package
\tcbset{% % tcolorbox options
index german settings,%
index colorize = false,%
lefthand ratio = 0.50,%
color hyperlink = blue,%
color command = purple,%
color environment = purple!65!black,%
doc left = 0.5in,%
doc marginnote = {colframe = blue!50!white,colback = blue!5!white},%
doc head command = {interior style = {fill,left color = blue!15!white}},%
doc head environment = {interior style = {fill,left color = blue!15!white}},%
doc head key = {interior style = {fill,left color = blue!15!white}},%
docexample/.style = {%
colback = gray!10!white,sidebyside,lefthand ratio = 0.5,center},%
}%
% Redefine tcolorbox's \tcbdocnew and \tcbdocupdated defaults.
\renewcommand*{\tcbdocnew}[1]
{\textcolor{green!50!black}{\sffamily\bfseries N} #1}
\renewcommand*{\tcbdocupdated}[1]
{\textcolor{blue!75!black}{\sffamily\bfseries U} #1}
\hypersetup{colorlinks=true} % colored links; no borders
% See https://tex.stackexchange.com/q/156383/218142
\newcommand*{\pkg}[1]{\textsf{#1}} % typeset package names
\newcommand*{\joe}{\textsf{joe}} % typeset joe
\newcommand*{\joeone}{\textsf{joeone}} % typeset joeone
\newcommand*{\joetwo}{\textsf{joetwo}} % typeset joetwo
\newcommand*{\lualatex}{Lua\LaTeX} % typeset LuaLaTeX
% A customized internal hyperref tool to
% mimic that in tcolorbox.
\NewDocumentCommand{\setplace}{ s m }{%
\IfBooleanTF {#1}%
{\phantomsection}%
{}%
\label{#2}%
}%
\NewDocumentCommand{\linktoplace}{ m m }{%
\hyperref[#1]{\texttt{#2}%
\ifnum\getpagerefnumber{#1}=\thepage\relax%
\else%
\textsuperscript{\ding{213}\,{P.}\,\pageref*{#1}}%
\fi%
}%
}%
% We need a new command for in-line listings to prevent overfull boxes.
% Anything in |...| will be in small plain text.
% Previously used !...! but that conflicts with colors.
\lstMakeShortInline[basicstyle=\normalfont\ttfamily\small]|
\DisableCrossrefs % index descriptions only
\PageIndex % index refers to page numbers
\CodelineNumbered % number source lines
\RecordChanges % record changes
\begin{document} % main document
\DocInput{\jobname.dtx} %
\DocInput{\jobname one.dtx} %
\DocInput{\jobname two.dtx} %
\PrintIndex %
\end{document} % end main document
%</driver>
% \fi
%
% \IndexPrologue{\section{Index}Page numbers refer to page where the
% corresponding entry is documented and/or referenced.}
%
% \CheckSum{23}
%
% \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 \~}
%
% \title{The \href{https://ctan.org/pkg/mandi}{\joe} Bundle}
% \author{^^A
% Paul J. Heafner\thanks{^^A
% Email: \href{mailto:heafnerj@gmail.com?subject=[Heafner]\%20mandi}
% {heafnerj@gmail.com}^^A
% }^^A
% }^^A
% \date{\today}
%
% \newgeometry{left=1.0in,right=1.0in,top=4.0in}
% \maketitle
% \thispagestyle{empty}
% \centerline{Version \joeversion}
% \centerline{\textbf{PLEASE DO NOT DISTRIBUTE THIS VERSION.}}
% \restoregeometry
%
% \newgeometry{left=1.0in,right=1.0in,top=0.5in,bottom=1.0in}
% \tableofcontents
% \newpage
% \phantomsection
% \addcontentsline{toc}{section}{Acknowledgements}
% \section*{Acknowledgements}
% Thank you.
%
% \newpage
% \phantomsection
% \addcontentsline{toc}{section}{Change History}
% \PrintChanges
% \newpage
% \restoregeometry
%
% \changes{v1.0.0}{2021-05-24}{Initial release.}
%
% \section{Introduction}
% This is the documentation for the \joe\ bundle, which is virtually useless.
%
% The \joe\ bundle consists of three packages: \joe, \joeone,
% and \joetwo.
%
% \section{All About the \joe\ Package}
% Load \joe\ as you would any package in your preamble.
%
%\iffalse
%<*example>
%\fi
\begin{dispListing*}{sidebyside=false,listing only}
\usepackage[options]{joe}
\end{dispListing*}
%\iffalse
%</example>
%\fi
%
%\iffalse
%<*example>
%\fi
\begin{docCommand}{joeversion}{}
Typesets the current version and build date.
\end{docCommand}
\begin{dispExample*}{sidebyside=false}
The version is \joeversion\ and is a stable build.
\end{dispExample*}
%\iffalse
%</example>
%\fi
%
% Try using the \refCom{joetwoversion} command.
%
% \StopEventually{}
%
% \newgeometry{left=0.50in,right=0.50in,top=1.00in,bottom=1.00in}
% \subsection{\joe\ Source Code}
%
% \iffalse
%<*package>
% \fi
% Definine the package version and date for global use, exploiting the fact
% that in a \pkg{.sty} file there is now no need for |\makeatletter| and
% |\makeatother|. This simplifies defining internal commands, with |@|
% in the name, that are not for the user to know about.
%
% \begin{macrocode}
\def\joe@Version{1.0.0}
\def\joe@Date{2021-05-24}
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\providecommand\DeclareRelease[3]{}
\providecommand\DeclareCurrentRelease[2]{}
\DeclareRelease{v1.0.0}{2021-05-24}{joe.sty}
\DeclareCurrentRelease{v\joe@Version}{\joe@Date}
\ProvidesPackage{joe}
[\joe@Date\space v\joe@Version\space A useless package]
% \end{macrocode}
%
% Define a convenient package version command.
%
% \begin{macrocode}
\newcommand*{\joeversion}{v\joe@Version\space dated \joe@Date}
% \end{macrocode}
%
% \restoregeometry
%
% \iffalse
%</package>
% \fi
%
% \Finale
Here is joeone.dtx:
% \iffalse meta-comment
% !TEX program = lualatexmk
%
% Copyright (C) 2021 by Paul J. Heafner <heafnerj@gmail.com>
% ---------------------------------------------------------------------------
% 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 Paul J. Heafner.
%
% This work consists of the files joe.dtx
% joeone.dtx
% joetwo.dtx
% joe.ins
% joe.pdf
% README.md
%
% and includes the derived files joe.sty
% joeone.sty
% joetwo.sty
% ---------------------------------------------------------------------------
%
% \fi
%
% \iffalse
%
%<*internal>
\iffalse
%</internal>
%
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
\expandafter\begingroup
\fi
%</internal>
%
%<*internal>
\usedir{tex/latex/joe}
\ifx\fmtname\nameofplainTeX
\expandafter\endbatchfile
\else
\expandafter\endgroup
\fi
%</internal>
%
%<*driver>
\ProvidesFile{joeone.dtx}
%</driver>
%
%<*driver>
\DisableCrossrefs % index descriptions only
\PageIndex % index refers to page numbers
\CodelineNumbered % number source lines
\RecordChanges % record changes
\begin{document} % main document
\DocInput{\jobname.dtx} %
\PrintIndex %
\end{document} % end main document
%</driver>
% \fi
%
% \CheckSum{23}
%
% \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{v1.0.0}{2021-05-24}{Initial release.}
%
% \section{All About the \joeone\ Package}
% Load \joeone\ as you would any package in your preamble.
%
%\iffalse
%<*example>
%\fi
\begin{dispListing*}{sidebyside=false,listing only}
\usepackage[options]{joeone}
\end{dispListing*}
%\iffalse
%</example>
%\fi
%
%\iffalse
%<*example>
%\fi
\begin{docCommand}{joeoneversion}{}
Typesets the current version and build date.
\end{docCommand}
\begin{dispExample*}{sidebyside=false}
The version is \joeoneversion\ and is a stable build.
\end{dispExample*}
%\iffalse
%</example>
%\fi
%
% Try using the \refCom{joeversion} command.
%
% \StopEventually{}
%
% \newgeometry{left=0.50in,right=0.50in,top=1.00in,bottom=1.00in}
% \subsection{\joeone\ Source Code}
%
% \iffalse
%<*package>
% \fi
% Definine the package version and date for global use, exploiting the fact
% that in a \pkg{.sty} file there is now no need for |\makeatletter| and
% |\makeatother|. This simplifies defining internal commands, with |@|
% in the name, that are not for the user to know about.
%
% \begin{macrocode}
\def\joeone@Version{1.0.0}
\def\joeone@Date{2021-05-24}
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\providecommand\DeclareRelease[3]{}
\providecommand\DeclareCurrentRelease[2]{}
\DeclareRelease{v1.0.0}{2021-05-24}{joeone.sty}
\DeclareCurrentRelease{v\joeone@Version}{\joeone@Date}
\ProvidesPackage{joeone}
[\joeone@Date\space v\joeone@Version\space A second useless package]
% \end{macrocode}
%
% Define a convenient package version command.
%
% \begin{macrocode}
\newcommand*{\joeoneversion}{v\joeone@Version\space dated \joeone@Date}
% \end{macrocode}
%
% \restoregeometry
%
% \iffalse
%</package>
% \fi
%
% \Finale
Finally here is joetwo.dtx:
% \iffalse meta-comment
% !TEX program = lualatexmk
%
% Copyright (C) 2021 by Paul J. Heafner <heafnerj@gmail.com>
% ---------------------------------------------------------------------------
% 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 Paul J. Heafner.
%
% This work consists of the files joe.dtx
% joeone.dtx
% joetwo.dtx
% joe.ins
% joe.pdf
% README.md
%
% and includes the derived files joe.sty
% joeone.sty
% joetwo.sty
% ---------------------------------------------------------------------------
%
% \fi
%
% \iffalse
%
%<*internal>
\iffalse
%</internal>
%
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
\expandafter\begingroup
\fi
%</internal>
%
%<*internal>
\usedir{tex/latex/joe}
\ifx\fmtname\nameofplainTeX
\expandafter\endbatchfile
\else
\expandafter\endgroup
\fi
%</internal>
%
%<*driver>
\ProvidesFile{joetwo.dtx}
%</driver>
%
%<*driver>
\DisableCrossrefs % index descriptions only
\PageIndex % index refers to page numbers
\CodelineNumbered % number source lines
\RecordChanges % record changes
\begin{document} % main document
\DocInput{\jobname.dtx} %
\PrintIndex %
\end{document} % end main document
%</driver>
% \fi
%
% \CheckSum{23}
%
% \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{v1.0.0}{2021-05-24}{Initial release.}
%
% \section{All About the \joetwo\ Package}
% Load \joetwo\ as you would any package in your preamble.
%
%\iffalse
%<*example>
%\fi
\begin{dispListing*}{sidebyside=false,listing only}
\usepackage[options]{joetwo}
\end{dispListing*}
%\iffalse
%</example>
%\fi
%
%\iffalse
%<*example>
%\fi
\begin{docCommand}{joetwoversion}{}
Typesets the current version and build date.
\end{docCommand}
\begin{dispExample*}{sidebyside=false}
The version is \joetwoversion\ and is a stable build.
\end{dispExample*}
%\iffalse
%</example>
%\fi
%
% Try using the \refCom{joeoneversion} command.
%
% \StopEventually{}
%
% \newgeometry{left=0.50in,right=0.50in,top=1.00in,bottom=1.00in}
% \subsection{\joetwo\ Source Code}
%
% \iffalse
%<*package>
% \fi
% Definine the package version and date for global use, exploiting the fact
% that in a \pkg{.sty} file there is now no need for |\makeatletter| and
% |\makeatother|. This simplifies defining internal commands, with |@|
% in the name, that are not for the user to know about.
%
% \begin{macrocode}
\def\joetwo@Version{1.0.0}
\def\joetwo@Date{2021-05-24}
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\providecommand\DeclareRelease[3]{}
\providecommand\DeclareCurrentRelease[2]{}
\DeclareRelease{v1.0.0}{2021-05-24}{joetwo.sty}
\DeclareCurrentRelease{v\joetwo@Version}{\joetwo@Date}
\ProvidesPackage{joetwo}
[\joetwo@Date\space v\joetwo@Version\space A third useless package]
% \end{macrocode}
%
% Define a convenient package version command.
%
% \begin{macrocode}
\newcommand*{\joetwoversion}{v\joetwo@Version\space dated \joetwo@Date}
% \end{macrocode}
%
% \restoregeometry
%
% \iffalse
%</package>
% \fi
%
% \Finale
\setcounter{CodelineNo}{0}before each\DocInput(I'm not sure how well code line indexing will work though)dtxgallery.dtxexample since I see no similar command.