Re: GSoC 2020: make hangs when making fonts

[Jonas Hahnfeld]

Am Mittwoch, den 01.07.2020, 10:43 +0200 schrieb Jean Abou Samra:
> Owen,
> 
> Le 01/07/2020 à 00:36, Owen Lamb a écrit :
> > On Tue, Jun 30, 2020 at 3:04 PM Jean Abou Samra <jean@abou-samra.fr> wrote:
> > >  So git clean didn't work? At this point, unfortunately I can't help 
> > > much--my
> > > previous message was merely a shot in the dark but I understand almost 
> > > nothing
> > > about fonts. Also, I'll be going on vacation pretty soon, so I won't have 
> > > time
> > > to set up LilyDev, sorry…
> > > 
> > 
> > No worries. Have a great vacation!
>  Thanks!
> > > That said, if CI itself started to fail recently, there must be something 
> > > broken
> > > in the sources, possibly in relation with a specific environement. Could 
> > > you try
> > > to compile after a git checkout release/2.18.0-1? If that succeeds, you 
> > > want to
> > > go through a git bisect to find the culprit.
> > > 
> > > 
> > 
> > That's a good idea--I'll try that next.
> > > PS: I guess https://gitlab.com/lilypond/lilypond/-/merge_requests/205 is 
> > > going
> > > to help in debugging.
> > > 
> > > 
> > 
> > This page is all Greek to me at the moment, but I'll look into it. Thanks!
>  
> Quick explanation: among other things, this merge request introduces a --ci 
> flag in autogen.sh,
> which helps testing just as CI does, with the same compiler settings.
> 
> Compiling this branch with --ci yields fine results for me. So, the issue is
> very likely related to your environment. CI runs in a docker container that
> is either Ubuntu 16 or 18. These ship with older versions of FontForge than
> my Ubuntu 20, as you'll notice in
> https://packages.ubuntu.com/search?keywords=fontforge&searchon=names&suite=bionic&section=all
> (the version there being 20170731 while mine is 20190801).
> 
> Paging Jonas: could we perhaps add a Docker file for Ubuntu 20.04?
> 
> I hope your problem can be solved by installing a newer FontForge, which can 
> be done
> from Ubuntu's newest apt repositories.

This makes absolutely no sense to me: CI runs with Ubuntu 16.04 and has
no problems on master with a version of FontForge from 2012 (?). So I
very much doubt this is the issue.

> To do that, I guess (guess!) you should add the
> following line to /etc/apt/sources.list:
>  deb http://cz.archive.ubuntu.com/ubuntu focal main universe
> 
> (view the full list of mirrors at 
> https://packages.ubuntu.com/focal/amd64/fontforge/download).
> 
> Then,
> 
> sudo apt update
> sudo apt-get -t focal install fontforge
> 
> could do the trick, though I'm really unsure with apt usage.

You must not do this. Mixing repositories from different versions is
bound to produce problems.

Jonas

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