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Re: [PATCH] Uninstall .dll last, reinstall first - final version

On Tue, 3 May 2005, Warren Young wrote:

> Igor Pechtchanski wrote:
> > Circular dependencies are not bugs.
> Well, there are two types of circular dependencies, and they're only a
> problem in one of these instances.
> Circular dependencies of packages in operation is not a problem.  That
> is, you can say that there is Package A which uses facilities in Package
> B, and vice versa, and this is not a problem.  These two packages simply
> have be installed together or uninstalled together to avoid a dependency
> problem.
> Circular dependencies during the [un]installation process _is_ a
> problem. This is where we get the old problem of cygwin.dll or bash
> being removed during an upgrade before all the uninstall scripts for
> other packages are run. This requires a different dependency tree than
> required to solve the above problem.
> The distinction is this: it can't be said that 'man' requires /bin/sh in
> operation, but its uninstall script does.  We shouldn't demand that bash
> be installed along with man, because any of several packages can provide
> /bin/sh. But if bash is the one providing /bin/sh on your system, it has
> to be removed after man during an upgrade where both packages have been
> updated.

I also wrote, in that same message:

> > Besides, installation dependencies aren't quire the same as
> > uninstallation dependencies.  I've posted on this topic before...

I understand the need to save bandwidth, but snipping away the relevant
part of the message, and then repeating it in the reply (albeit in some
more detail) isn't a particularly helpful use of the bandwidth either.
      |\      _,,,---,,_
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
Lunar eclipse..." -- WCBS Radio Newsbrief, Oct 27 2004, 12:01 pm EDT

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