jobname, ifdefstring, IfSubStringInString, detokenize

Question

My question is originally the same as use jobname to "pass parameters"?

But that particular question doesn't seem to have a complete answer. (I'm sure that in the minds of experts who deeply know the issue, it is solved.)

Looking at a few other related threads,

How can I check if the filename of a LaTeX document contains a string?

\jobname, character codes and \detokenize

I've been able to largely solve my original question using \IfSubStringInString but not using \ifdefstring. See the example code below.

% run this with pdflatex -jobname=hello thissourcecode.tex
\documentclass{article}
\usepackage{etoolbox}
\usepackage{substr}
\begin{document}
jobname is: ``\jobname''.

% The following gives "true"
\IfSubStringInString{\detokenize{hello}}{\jobname}{substr true}{substr false}

% The following gives "false"
\ifdefstring{\detokenize{hello}}{\jobname}{etoolbox true}{etoolbox false}
\end{document}

The solution with \IfSubStringInString isn't bad at all, except that the package doesn't seem to include a command for exact match. I'd also love to get \ifdefstring to work with \jobname.

Answer 1

You can do it with etoolbox (and a recent release of LaTeX).

But it's better to do it without it; I provide a generic string equality comparison and one specific for comparison with \jobname.

\documentclass{article}
\usepackage{etoolbox}

\ExplSyntaxOn
\NewExpandableDocumentCommand{\stringsequalTF}{mmmm}
 {
  \str_if_eq:eeTF { #1 } { #2 } { #3 } { #4 }
 }
\NewExpandableDocumentCommand{\stringisjobnameTF}{mmm}
 {
  \str_if_eq:nVTF { #1 } \c_sys_jobname_str { #2 } { #3 }
 }
\ExplSyntaxOff

\setlength{\parindent}{0pt} % just for the example

\begin{document}

jobname is: ``\texttt{\jobname}''

\section{With \texttt{etoolbox}}

\ExpandArgs{ee}\ifstrequal{\jobname}{\detokenize{hello}}{true}{false}

\ExpandArgs{ee}\ifstrequal{\jobname}{\detokenize{ryo}}{true}{false}

\section{Without \texttt{etoolbox}}

\subsection{With \texttt{\string\stringsequalTF}}

\stringsequalTF{\jobname}{hello}{true}{false}

\stringsequalTF{\jobname}{ryo}{true}{false}

\subsection{With \texttt{\string\stringisjobnameTF}}

\stringisjobnameTF{hello}{true}{false}

\stringisjobnameTF{ryo}{true}{false}

\end{document}