[OS X TeX] jobname

[Ross Moore]

Hi Alain,

On 25/01/2007, at 4:28 AM, Alain Schremmer wrote:

>> FAQ: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=filename
>
> Thanks: I had looked but of course didn't find this.
>
> However, I cannot make it work. The code given there,
>
>    \def\ThisFile{\jobname}
>    \newcounter{FileStack}
>    \let\OrigInput\input
>    \renewcommand{\input}[1]{%
>      \stackinput{#1}{\OrigInput}%
>    }
>    \newcommand{\stackinput}[2]{%
>      \stepcounter{FileStack}%
>      \expandafter\let
>        \csname NameStack\theFileStack\endcsname
>        \ThisFile
>      \def\ThisFile{#1}%
>      #2{#1}%
>      \expandafter\let\expandafter
>        \ThisFile
>        \csname NameStack\theFileStack\endcsname
>      \addtocounter{FileStack}{-1}%
>    }
>
> gives me "This makes 100 errors; please try again"

This coding doesn't seem to have been well-tested with
modern LaTeX. It falls foul of things that happen both
at  \begin{document}  and  \end{document} .

However, it can be easily fixed as follows:

   \def\ThisFile{\jobname}
    \newcounter{FileStack}
    \newcommand{\recordinput}[1]{%  <<---  new name
      \stackinput{#1}{\OrigInput}%
    }
    \newcommand{\stackinput}[2]{%
      \stepcounter{FileStack}%
      \expandafter\let
        \csname NameStack\theFileStack\endcsname
        \ThisFile
      \def\ThisFile{#1}%  <<---- \edef might be better here !
      #2{#1}%
      \expandafter\let\expandafter
        \ThisFile
        \csname NameStack\theFileStack\endcsname
      \addtocounter{FileStack}{-1}%
   }

%%  delay the re-definition of  \input until later
  \AtBeginDocument{%
    \let\OrigInput\input
    \let\input\recordinput
  }
%%  set it back at the end of the document
  \AtEndDocument{\let \input \OrigInput}



> I looked at the reference, patching techniques, but this is way  
> beyond the little bit I have learned so I am crying for help.

Above is an example of how it should be done.
That is,
   (i)  define a new function (or "method") to do what you want;
  (ii)  preserve, using \let , a pointer to the original method;
  (iii) use  \let to rebind the macro-name to your new method,
        delaying to a time when it is safe to do so;
  (iv)  use \let again, to rebind the macro name back to the
        original method, after you have finished using your
        new method.


Beware though. I've not tested the above instance with a serious job;
nor have I tested for how it works with  \include .


>
> Hopeful regards
> --schremmer
>
>
>
>
>
>
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>

------------------------------------------------------------------------
Ross Moore                                         ross at maths.mq.edu.au
Mathematics Department                             office: E7A-419
Macquarie University                               tel: +61 +2 9850 8955
Sydney, Australia  2109                            fax: +61 +2 9850 8114
------------------------------------------------------------------------



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