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Re: Supporting multiline Package-Requires header


From: Nicolas Richard
Subject: Re: Supporting multiline Package-Requires header
Date: Tue, 11 Aug 2015 10:44:06 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

>> I understand that the new tools will work with old files, but will the
>> new files work with the old tools ? i.e. will it be possible to install
>> these packages to emacs 24.5 ?
>
> No. A package that writes it like this will only be (properly) installable on 
> Emacs 25 and up. 
>
> Of course I'd never drop support for Emacs 24 on one of my packages
> just for the sake of this minor feature. But once I start routinely
> requiring Emacs 25.1 because of other features, I'll be glad to have
> this as a bonus.

It makes sense. My worry is also that emacs-24 must have a way to
understand that the package is "not installable". e.g. we don't want
list-packages to suddenly break on older emacsen (I have no idea if this
can actually happen).

-- 
Nico



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