[maemo-developers] Icons are just a few bytes, right ?

[From: john.beattie at accenture.com]

From: maemo-developers-bounces at maemo.org [mailto:maemo-developers-bounces at maemo.org] On Behalf Of Attila Csipa
Sent: 12 March 2010 12:29
To: Marius Vollmer
Cc: maemo-developers at maemo.org
Subject: Re: Icons are just a few bytes, right ?

On Friday 12 March 2010 12:42:11 you wrote:
> From all the 
> available versions of a package, apt selects one upfront as the
> candidate and then sticks with that.  The only decision it makes is
> between installing that candidate version, keeping the version you have
> already installed, or removing the package altogether.  It will not
> reconsider which version should be the candidate based on dependencies
> between packages.

I'm talking about a scenario when the application has an 'older than' 
dependency (often in combination with '|'), which apt (and HAM) *will* 
honour. So if app A has a libfoo << 2.0 dep, app B has libfoo >> 1.0, and 
there is currently a libfoo 1.5 in the repo, both A and B are installable. If 
you upload libfoo 2.5, however, and 1.5 gets automatically archived, app A is 
no longer installable (even though it could have been if you kept both 
versions of libfoo). Not a common case, I admit, just saying one has to be 
careful when removing packages from repos.

Regards,
Attila



This thread includes quite a bit of useful insight into the general behaviour
of apt.   Does anybody have a reference for a description of apt's behaviour?
Ideally, a comprehensive specification.

I don't mean the man page, that only gives the arguments to apt-get or
whatever.  What I mean is a description of what, say, 

# apt-get install pkg

does.  More exactly, what it does relative to a given sources.list.

Regards,
John



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