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From:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Subject:	Re: [PATCH setup 0/3] Setup replacement for incver_ifdep
To:	Achim Gratz <Stromeko-i47jiTeKxPI AT public DOT gmane DOT org>, cygwin AT cygwin DOT com
References:	<1442937170-17580-1-git-send-email-jon DOT turney AT dronecode DOT org DOT uk> <87mvwegy0r DOT fsf AT Rainer DOT invalid>
Message-ID:	<5602A5F4.3060505@dronecode.org.uk>
Date:	Wed, 23 Sep 2015 14:15:32 +0100
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In-Reply-To:	<87mvwegy0r.fsf@Rainer.invalid>

On 22/09/2015 18:32, Achim Gratz wrote:
> Jon Turney writes:
>> Since we now have scripts which run on every setup run, a package which requires
>> another package to do some work after it is installed or uninstalled can create
>> a file to act as a trigger for that to happen.
>
> There aren't any stratified scripts for pre-remove, so a lot of the
> things that you might wish for don't work anyway.  So again it would
> need to be fixed without getting a trigger or setup would need to be
> made a lot smarter than it is today.

I thought that permanent postinstall scripts run even when no packages 
are being installed, or only packages are being removed, so they they 
are effectively run every time setup is?

>> Unfortunately, it's not very practical to change to doing that for the all
>> packages which contain info files, so I am suggesting this approach.
>
> So just do it unconditionally; I was planning to change _update-info-dir
> accordingly, but haven't found the time yet.  I do the same with mandb
> locally already and I haven't looked back.

Tempting, but I don't believe that is a good solution, since it adds the 
time it takes to rebuild the info directory to every setup run.

> $ time /etc/postinstall/update-info-dir.sh.done
>
> real    0m18.169s
> user    0m3.261s
> sys     0m5.703s

I also don't think it sets a good example.  Any other packages which 
require update scripts to run (which may take even longer) when packages 
are installed/removed, should not be doing that every time setup is run, 
if avoidable.

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