[TriLUG] URPMI and Emacs

[Tanner Lovelace]

On Tue, 2002-05-14 at 14:37, Jeremy P wrote:

> Question about removing packages: Will urpmi look at the dependencies, and
> if they're not being used by other packages, remove the dependencies too?  
> (I don't think there's an option for standard rpm for this, although
> *shudder* the standard Windows uninstaller can do this.)  Can debian do
> this somehow?
> 
> --Jeremy, used to the apt- and urpm-less world of Red Hat Linux.

Jeremy, I believe what you are talking about is something
like this:

[Package A] --depends on--> [Package B] --depends on--> [Package C]

where [Package C] doesn't depend on anything else and nothing else
depends on [Package C] and [Package B].  I believe
you're asking if you use urpmi (actually, the command is urpme,
where the "e" comes from the "-e" you pass to rpm to remove a 
package) to delete [Package A], will it also delete packages
[B] and [C].  The answer to this is no.  The cost of figuring
out all those links at run time would be to prohibitively 
expensive (I believe the problem may even be NP-complete).
However, if you use urpme to delete [Package C] it will notice
that packages [A] and [B] depend on [C] and ask you if you
would like to delete [A] and [B] too.

I believe apt works in exactly the same way.

Tanner
-- 
Tanner Lovelace | lovelace at wayfarer.org | http://wtl.wayfarer.org/
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