htmloverpdf
Render a HTML overlay over existing PDF files.
Install
sudo apt install libgirepository1.0-dev gir1.2-poppler-0.18 gir1.2-pango-1.0 python3 -m pip install htmloverpdf
A wrapper for https://weasyprint.org/ which allows compositing with existing PDF files.
It parses the HTML looking for <img> tags with src urls ending ".pdf". Each one begins a new page and copies all source pages overlaying the weasyprint output. The magic value "blank.pdf" outputs sections HTML without overlaying.
Usage
htmloverpdf < test.html > test.pdf