Using enotez for getting endnotes at the end AND footnotes on each page (like we used to get from the endnotes package)

Question

I wish to reproduce the following using the enotez package:

\documentclass{article}
\usepackage{endnotes}

\begin{document}

My text\footnote{my footnote}

\newpage

\theendnotes

\end{document}

The above gives me footnotes and endnotes.

My attempt :

\documentclass{article}
\usepackage{enotez}

\begin{document}

My text\footnote{my footnote}

\newpage

\printendnotes

\end{document}

This is giving my only footnotes.

\documentclass{article}
\usepackage{enotez}
\let\footnote=\endnote

\begin{document}

My text\footnote{my footnote}

\newpage

\printendnotes

\end{document}

This is giving my only endnotes.

How do I get both footnotes and endnotes from enotez package ?

Answer 1

You can define \footnote to issue both \footnote and \endnote; this of course requires to use an alias of the original \footnote command.

\documentclass{article}

\usepackage[papersize={52mm,74mm}]{geometry} % just to make a smaller picture

\usepackage{enotez}

\NewCommandCopy{\enotezfootnote}{\footnote}
\RenewDocumentCommand{\footnote}{om}{%
 \IfNoValueTF{#1}
   {\enotezfootnote{#2}\endnote{#2}}
   {\enotezfootnote[#1]{#2}\endnote[#1]{#2}}%
}
\makeatletter
\setenotez{mark-cs=\@gobble}
\makeatother

\begin{document}

My text\footnote{my footnote}

My text\footnote{my second footnote}

\clearpage
\printendnotes

\end{document}

Answer 2

Here is how we can do this in Latex-2. The \footnote takes two arguments. I have used only the mandatory argument in redefining it. Can you please show me how I would check for the optional first argument like you do in your answer @egreg in this case ?

\documentclass{article}

\usepackage{enotez}

\let\oldfootnote\footnote
\renewcommand{\footnote}[1]{
  \oldfootnote{#1}\endnote{#1}
}

% Without this we get ***two*** marks, one from the footnote
% and one from the endnote. This disables the endnote mark.

\makeatletter
\setenotez{mark-cs=\@gobble}
\makeatother


\begin{document}

My text\footnote{my footnote}
My text\footnote{my second footnote}

\clearpage
\printendnotes

\end{document}