DocBook to ePub

Thibaut Cuvelier tcuvelier at lyx.org
Sat Jan 30 03:56:13 UTC 2021


On Sat, 30 Jan 2021 at 01:30, Stephan Witt <st.witt at gmx.net> wrote:

> Am 29.01.2021 um 18:38 schrieb Thibaut Cuvelier <tcuvelier at lyx.org>:
> >
> > Dear list,
> >
> > As promised, I started working on ePub output, building upon the new
> DocBook output.
> >
> > Here is a script that performs the complete process of taking a DocBook
> file and generating the ePub. It has several dependencies:
> >
> > - an XSLT processor:
> >       • not xsltproc (http://xmlsoft.org/xslt/xsltproc2.html):
> available for most Linux distributions, I guess it is available by default
> on macOS, must be bundled for Windows. I tried several versions for
> Windows, but an old bug that should have been fixed in 1.1.24 (roughly
> 2010) is still there:
> >               • I/O error : No such file or directory
> >               • xsltDocumentElem: unable to save to
> C:/Users/Thibaut/AppData/Local/Temp/tmp6c2i6a7h/OEBPS/package.opf
> >       • Saxon 6 (available for most Linux distributions, must be bundled
> for Windows and macOS, requires Java). It's outdated software (circa 2005),
> but newer versions are not 100% backward compatible, so it is still very
> widely used. Other DocBook stylesheets would work on newer Saxon, but they
> are not as reliable as the old ones (like
> https://github.com/docbook/xslTNG).
> >       • not MSXML6 (Windows-only, mostly built-it, but not compatible
> with the DocBook stylesheets — it wrongly errors with chunking) or .Net
> XSLT engine (nxslt/nxslt2).
> > - the official DocBook XSLT stylesheets. Three parts are required:
> XHTML, XHTML5, and ePub. For now, I copied the needed parts in a patch. On
> some Linux distributions, this could be replaced by a version installed by
> the package manager (Ubuntu 20.04 has a near-up-to-date version, although
> the latest one has been released in 2016:
> https://github.com/docbook/xslt10-stylesheets/releases/tag/release%2F1.79.2;
> Fedora is up-to-date).
> >
> > The integration into LyX should be complete, minus testing on Linux and
> others and packaging issues: the dependencies must be included for Windows
> and macOS, not for all Linux distros.
>
> On macOS 10.14 (Mojave) I have:
>
> $ xsltproc -V
> Using libxml 20904, libxslt 10129 and libexslt 817
> xsltproc was compiled against libxml 20904, libxslt 10129 and libexslt 817
> libxslt 10129 was compiled against libxml 20904
> libexslt 817 was compiled against libxml 20904
>
> Why not?
>

I was not able to make xsltproc work on Windows with these stylesheets, it
gave many errors when creating new files. What if you try with the
following docbook2epub.py script (it goes in lib/scripts)?
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