DNS address allowed to contain '-', but not flatpak ID, any suggestion?

[Philip Withnall]

On Tue, 2018-01-30 at 22:43 +0800, Robin Lee wrote:
> Hi, everybody!
> 
> I am a Fedora packager and recently start to learn flatpak.
> 
> I chose Zim as my first flatpak. The official web host of this
> package is zim-wiki.org.
> ( '-' is of course a valid character in a host name'. )
> And the ID in appdata is 'org.zim-wiki.Zim'.
> 
> So I tried to use the same ID as flatpak ID. But flatpak disallowed
> this case:
> "Only last name segment can contain -"
> 
> So what is the best solution for this issue?
> Choose another DNS address to be used as flatpak ID?
> Sustitude '-' with another character or an escape sequence?
> Or flatpak should remove the limit for '-'?

This was discussed on the mailing list earlier this month:

https://lists.freedesktop.org/archives/flatpak/2018-January/000906.html

I would recommend `org.zim_wiki.Zim` as the flatpak ID. Ideally, the
appdata ID could be changed to this too, but see the above discussion
about that.

Philip
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