Re: [RFC] Switch Docker images to Ubuntu 20.04 and bump requirements

[Jonas Hahnfeld]

On Sun, 2023-01-29 at 16:37 +0000, Werner LEMBERG wrote:
> > Another "pain point" is that the images are much bigger (997MB
> > compared to 823MB with Ubuntu 18.04).
> 
> Ouch.
> 
> > I had a quick look and most if it seems to come from TexLive. If
> > somebody has ideas how to "install less" or otherwise reduce the
> > size, I would welcome contributions.
> 
> Here is a comparison of the installed sizes of the TeXLive packages
> (I took the info from https://packages.ubuntu.com).
> 
>   package                    bionic (18.04)  focal (20.04)
>   -------------------------  --------------  -------------
>   texlive-base                  52MB            73MB
>   texlive-binaries              36MB            36MB
>   texlive-fonts-recommended     18MB            15MB
>   texlive-font-utils             4MB             4MB
>   texlive-lang-cyrillic         40MB            40MB
>   texlive-metapost               2MB             3MB
>   texlive-plain-generic         53MB            56MB
> 
>   texinfo                        7MB            11MB
>   texi2html                      2MB             2MB
>                               -------         -------
>                                214MB           240MB
> 
> This doesn't explain the difference of 160MB...  I don't have enough
> time to do more size comparisons, sorry.

/usr/share/texlive/ is 126M on Ubuntu 18.04 and 153M on Ubuntu 20.04,
that's the biggest absolute increase of one package (group) that I
could find. That said, I just noticed /usr/share/icons/ going from 0.5M
to 64M. It's split between adwaita-icon-theme, humanity-icon-theme,
ubuntu-mono, all pulled in transitively by fontforge (via libgdraw6 and
libgtk-3-0). I guess we can just manually delete that directory?

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