Re: [gentoo-user] Re: Re: "emerge -DuvatN world" doesn't show all upgradeable packages

[Alan McKinnon <alan.mckinnon@gmail.com>]

On Tuesday 08 April 2008, Michael Schmarck wrote:
> Alan McKinnon <alan.mckinnon@gmail.com> wrote:
> > On Tuesday 08 April 2008, Michael Schmarck wrote:
> >> Connected question: How do I quickly find all the packages that
> >> got installed as a dependency, but which are no longer needed,
> >> because the dependent package got removed (as an example, I'd
> >> like to find kde-i18n, because that used to be a dependency of
> >> kde-meta and kde-meta is no longer installed).
> >
> > emerge --depclean
>
> thanks. 200 some packages, which would be removed. Quite a
> lot.

Ouch. You'll be wanting to go through that lot with a fine toothcomb and 
verify what you really no longer need. 'emerge -n <package>' will put 
the package in world so that it won't be considered by --depclean

With that big a change I usually 'emerge -C' stuff in chunks manually to 
get the --depclean output down to a more manageable length

> After removing stuff, a revdep-rebuild should be done, shouldn't
> it?

In theory yes.
In practice... in practice you get whatever you get, and sometimes 
that's two broken halves. revdep-rebuild usually fixes most of it

Also consider the implications either way of emerge --withbdeps


-- 
Alan McKinnon
alan dot mckinnon at gmail dot com

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