Create colophon file with font information in LuaTex

Question

Is there a way to automatically generate a colophon information in LuaTex?

Ideally I would like to automatically generate a file (plain text) that will list the different font and font-families that actually appear in the tex (LuaTex) document incase latex substitutes missing fonts or if a particular fonts family isn't declared.

Thank you!

Answer 1

You can put pdffonts in a script so that after you compile the document it automatically generates the text file you want, texfonts.sh:

#!/bin/sh
set -e

INFILE="$1"

latexmk -pdf -lualatex "$INFILE"
pdffonts "${INFILE%.tex}.pdf" > "${INFILE%.tex}-fonts.txt"

Here's a sample file to demonstrate, test.tex:

\documentclass{article}

\usepackage{fontspec}
\setmainfont{TeX Gyre Pagella}
\setsansfont{TeX Gyre Heros}
\setmonofont{TeX Gyre Cursor}
\newfontfamily{\chinesefont}{FandolFang}
\newfontfamily{\greekfont}{EB Garamond}

\usepackage{sectsty}
\allsectionsfont{\sffamily}

\usepackage{lipsum}


\begin{document}

\section{Hello}
\lipsum[1]

\subsection{Unicode}

\begin{tabular}{ll}
    Greek & {\greekfont λόγος} \\
    Mandarin & {\chinesefont 我们爱狗。} \\
\end{tabular}

\subsection{World}
\textbf{\lipsum[2]}

\section{Code}
\verb|\relax\bye|

\end{document}

Run sh texfonts.sh test, and there will be two outputs: the text file test-fonts.txt and the PDF.

test-fonts.txt:

name                                     type              encoding         emb sub uni object ID
---------------------------------------- ----------------- ---------------- --- --- --- ---------
DETGWH+TeXGyreHeros-Bold-Identity-H      CID Type 0C       Identity-H       yes yes yes      5  0
FHSMPY+TeXGyrePagella-Regular-Identity-H CID Type 0C       Identity-H       yes yes yes      7  0
NRRIPR+EBGaramond12-Regular-Identity-H   CID Type 0C       Identity-H       yes yes yes      9  0
OAALEX+FandolFang-Regular-Identity-H     CID Type 0C       Identity-H       yes yes no      11  0
JRCOOU+TeXGyrePagella-Bold-Identity-H    CID Type 0C       Identity-H       yes yes yes     13  0
VTYOBX+TeXGyreCursor-Regular-Identity-H  CID Type 0C       Identity-H       yes yes yes     15  0