Avoid generating a new PDF ID with each compilation

Question

I want to create reproducible PDFs with lualatex, so if no code to the change took place, two compilation runs should yield the same identical PDF. I was able to set the CreationDate and ModDate using hyperref, overwriting the ID however has no effect.

\documentclass{standalone}
\usepackage{hyperref}
\hypersetup{
  pdfinfo={
    Author={Just me},
    Title={My title},
    CreationDate={D:20222145000000},
    ModDate={D:20222145000000},
    ID = {6D2C23D7481FB94ACFBDA10EA47F3CB9},
  }
}
\begin{document}
Hallo
\end{document}

Related: I've just learned what it is from this very nice page on the subject, for beginners like me. — Sigur, Jul 22 '22 at 20:36

score 4 · Answer 1 · answered Jul 22 '22 at 20:35

With the new pdfmanagement you can use

\pdfmeta_set_regression_data:. That is the command we are using in the pdf tests.

\DocumentMetadata{uncompress}
\ExplSyntaxOn
\pdfmeta_set_regression_data:
\ExplSyntaxOff
\documentclass{standalone}
\usepackage{hyperref}
\begin{document}
Hallo
\end{document}

Without it you can add

   \tex_pdfvariable:D trailerid
     {[~
       <2350CAD05F8A7AF0AA4058486855344F>~
       <2350CAD05F8A7AF0AA4058486855344F>~
     ]}

to set the trailerid.

Avoid generating a new PDF ID with each compilation

1 Answers1