EPUB is a format designed for reading electronic books on portable
texi2any generated EPUB 3.2 in 2022. An EPUB
file is a ZIP archive container, holding informative files as
well as the manual rendered in HTML.
The generation of the EPUB file depends on the
Perl module being installed. This dependency is checked at runtime.
In the default case, trying to output EPUB without this dependency raises an
error. However, if the EPUB output file is not generated, with the
EPUB_CREATE_CONTAINER_FILE set to 0, it is
not an error if
Archive::Zip is not installed.
texi2any tests related to EPUB generation do not require the
Archive::Zip, as they set
EPUB_CREATE_CONTAINER_FILE to 0 and keep the directory containing
the files and directories needed for the EPUB file by setting the
EPUB_KEEP_CONTAINER_FOLDER customization variable to 1.