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Bug#492861: Progress bar rewinds when running pre-pkgsel.d/10popcon

Jérémy Bobbio <lunar@debian.org> writes:

> On Tue, Aug 05, 2008 at 06:33:12PM +0200, Frans Pop wrote:
>> Because not only is there absolutely no need for them to do so, it is also 
>> seriously fragile to expect random hook scripts to output nothing else 
>> than their progress bar end position.
> The patch handles any script output and log it.  The progress bar end
> position must be on the last line of the output to be considered,
> though.
>> Remember that anybody (think preseeding) can drop in hook scripts.
> I actually decided to go that way thinking about custom hook scripts…

You made me think is that someone writing a hook needs to have
knowledge about d-i and in case of problems, we can mark them as:

 - d-i bug: if this is a default hook script
 - user mistake: if the user provided a hook script that has a failure

partman has the same potential to be broken (I did it when doing a
derivative) and we all like the flexibility that partman gives to us.

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