[Merge] ~mwhudson/livecd-rootfs/+git/livecd-rootfs:language-support-in-catalogs into livecd-rootfs:ubuntu/master

[Michael Hudson-Doyle]

> Thanks, the code seems fine but I've some questions on the intended design.
> Checking subiquity it seems the locale_support key isn't used yet? Do you have
> a spec available?

It's here https://docs.google.com/document/d/190yqQDMca174L7iBWzDjDAimbyhqbH_BWQsCRJ1ymGY/edit# as much as it's anywhere.

> Specifically how is 'locale_support: langpack' going to be used? Should the
> catalog describe which langpacks to install or is that going to be left to
> decide by subiquity calling the language support command?

The latter.

> Also do we really need a list of preinstalled languages, at the time we pull
> in language packs on the target it should be clear what is already available
> there?

Do you mean, subiquity when asked to install /cdrom/casper/minimal.squashfs in English, it could just check to see if /cdrom/casper/minimal.en.squashfs is there? This is maybe a bit over-engineered but I want to be able to access a source catalog over the internet so I don't want to have to be probe for install sources, I want the catalog to be self-contained in that respect. If that's not what you mean, can you explain more?
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https://code.launchpad.net/~mwhudson/livecd-rootfs/+git/livecd-rootfs/+merge/408855
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~mwhudson/livecd-rootfs/+git/livecd-rootfs:language-support-in-catalogs into livecd-rootfs:ubuntu/master.