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Bug#822730: initramfs-tools: Should we migrate to a "interest-noawait" trigger for update-initramfs -u?



On Tue, 26 Apr 2016 22:10:14 +0200 Niels Thykier <niels@thykier.net> wrote:
> Package: initramfs-tools
> Version: 0.125
> Severity: wishlist
> Usertags: declarative-packaging 
> 
> Hi,
> 

Hi,

Any comments on this? :)

Thanks,
~Niels

PS: Quoted in full below for your convenience. :)

> The update-initramfs tool currently has a bit of magic for deferring
> changes during upgrades (by exploiting dpkg-trigger).  This is fine,
> but I was wondering if we could perhaps add a file-based interest
> trigger (or simply migrate to a declarative activate-noawait trigger).
> 
> I got basically two reasons for this bug:
> 
>  * Request for support in debhelper #491027 and lintian #678962
>  * Promotion of "declarative packaging"[1].
> 
> 
> At first glance[2], I would recommend adding a file-based trigger for the
> following reasons:
> 
>  * Packages would just need to install files in
>    usr/share/initramfs-tools/{hooks,scripts} and initramfs-tools
>    would take care of the rest.
> 
>  * There would be no need for lintian tags or changes to debhelper to
>    improve support.  It would "just work"(tm).
> 
> This file-based trigger would be used in /addition/ to the existing
> trigger.  AFAICT, some packages only conditionally need to trigger
> update-initramfs (and these would still need to be able to call
> "dpkg-trigger --no-await update-initramfs").
> 
>  * What do you think about this suggestion?
> 
>  * Alternatively, would the use of declarative triggers[3] be ok for
>    the debhelper support?
> 
> 
> Thanks,
> ~Niels
> 
> [1] https://wiki.debian.org/Teams/Dpkg/Spec/DeclarativePackaging
> 
> [2] I admit having very limited overview over the use-cases around
> update-initramfs.
> 
> [3] Like we did with ldconfig.  Basically add
> 
>   activate-noawait update-initramfs
> 
> to the packages' triggers file.
> 
> 


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