Re: [PATCH 2/2] ci: use system asciidoctor

> On Wed, Sep 02, 2026 at 09:55:49AM +0200, Patrick Steinhardt wrote:
> 
> > One thing that we might have to worry about is compatibility with _old_
> > versions of asciidoctor. Now that we're using a more modern version of
> > it we might start relying on features that weren't available in older
> > versions, and we wouldn't notice anymore. So we kind of have the reverse
> > problem now.
> 
> Right, this is the "we could in theory check both" path I mentioned
> earlier.
> 
> v1.5.8 is sufficiently old that I don't think we need to care anymore.
> We can still take bug reports if somebody happens to use it and finds a
> problem. Checking other older versions isn't likely to be that
> interesting (the next version after 1.5.8 is 2.0.0, which had a higher
> than usual chance of breaking things).

> > >  Documentation)
> > > -	sudo apt-get -q -y install asciidoc xmlto docbook-xsl-ns make ruby
> > > +	sudo apt-get -q -y install asciidoc xmlto docbook-xsl-ns make ruby \
> > > +		asciidoctor
> > >  
> > > -	sudo gem install --version 1.5.8 asciidoctor
> > >  	sudo gem install concurrent-ruby
> > 
> > Huh. I was wondering whether we can now stop installing Ruby altogether,
> > but we still install the "concurrent-ruby" Gem. But what even is that,
> > and what do we use it for?
> > 
> > It's originally been introduced via 974cdca345 (doc: introduce a
> > synopsis typesetting, 2024-09-24), but unfortunately the commit message
> > does not document why we have to install that Gem now. I couldn't find
> > any reasoning in the mailing list thread, either.
> 
> Er, yeah, see my cover letter. :)