Feature request: embedfile support

[hanetzer]

Should be easy enough in theory, at least for epub format (idk too much about mobi) since you can just plop the
file into the zip.

~/texlive/2022/texmf-dist/tex/generic/embedfile/embedfile.sty 185 Package embedfile Error: Missing pdfTeX in PDF mode.
^error presented at current invocation.

[michal-h21]

The problem is that not all file types are supported in Epub, so it is not a good idea to embed arbitrary files. But some supported files, such as videos or audio, should work.

I will make a pull request to the package to remove the error message, and add a support for embedfile commands to TeX4ht sources.

[michal-h21]

The basic embedfile.4ht can look like this:

% embedfile.4ht (2023-01-12-14:40), generated from tex4ht-4ht.tex
% Copyright 2023 TeX Users 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. The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3c 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 the TeX4ht Project <http://tug.org/tex4ht>.
%
% If you modify this program, changing the
% version identification would be appreciated.
\immediate\write-1{version 2023-01-12-14:40}

\NewConfigure{embedfile}{1}
\Configure{embedfile}{{\Configure{Needs}{File: \embed:file}\Needs{}}}
\newcommand\embedfile[2][]{
  \edef\embed:file{#2}%
  \a:embedfile%
}

% dummy commands that can be used in the document
\newcommand\embedfilefinish{}
\newcommand\embedfilesetup[1]{}
\newcommand\embedfilesort[1]{}
\newcommand\embedfilefield[2]{}
\newcommand\embedfileifobjectexists[4]{}
\newcommand\embedfilegetobject[2]{}

\Hinput{embedfile}
\endinput

It doesn't fix the Missing pdfTeX error, that will be hopefully fixed by my pull request.

[hanetzer]

The problem is that not all file types are supported in Epub, so it is not a good idea to embed arbitrary files. But some supported files, such as videos or audio, should work.

Ah. well, my use case isn't 'supported' files per se. I just like the idea of documents which contain their
own source code, as a preservation thing.

[michal-h21]

That sound not possible with Epub, unfortunately. But I've added embedfile support to TeX4ht, so you shouldn't get errors in the near future.