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Insert values from a file in a latex document

If a have a latex document, how can I read some key-value pairs from a file an insert them into the document?

Something like this:

Latex code:

customer ID: ${customerID}

Text file:

customerID=123456

And the resulting .pdf file should contain the customer ID.

Solution

  • We can always write a perl script to expand them...

    defs.txt:

     customerID=123456
 customerTel=22530000000

    doc.tex:

    \documentclass{article}
\begin{document}
latex
customer ID: ${customerID}
and ${address} 
costum telphone ID: ${customerTel}
\end{document}

    perl script tex-defs:

    #!/usr/bin/perl -n

BEGIN{$tex=0;}

if(not $tex and /^(\w+)=(.*)/) { $v{$1}=$2 }
if(/\\documentclass\{/       ) { $tex=1  }
if($tex)                       { s/\$\{(\w+)\}/$v{$1} || "???$1"/ge; print }

    testing (after chmod...): 

    $ tex-defs defs.txt doc.tex 
\documentclass{article}
\begin{document}
latex
customer ID: 123456
and ???address
costum telphone ID: 22530000000
\end{document}