Date: Fri, 01 Aug 2008 17:15:54 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-ports@freebsd.org Subject: Re: Call for comments - pkg_trans Message-ID: <g6v9be$2l6$1@ger.gmane.org> In-Reply-To: <20080801125414.55567d37@ayiin> References: <g6res0$giq$1@ger.gmane.org> <489144B5.4030101@FreeBSD.org> <g6sgqk$mcm$1@ger.gmane.org> <4892022F.1080009@FreeBSD.org> <9bbcef730807311438m45802827y91c7bb7366406af6@mail.gmail.com> <20080801125414.55567d37@ayiin>
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Norberto Meijome wrote:
> On Thu, 31 Jul 2008 23:38:21 +0200
> "Ivan Voras" <ivoras@freebsd.org> wrote:
>=20
>>> BTW, I thought of another problem scenario. The user installs port M,=
and it
>>> brings dependencies D1, D2, and D3. Then the user installs port N whi=
ch also
>>> has port D2 as a dependency. =20
>> Port N then won't install D2 as it already exists. The user can
>> rollback [N], then rollback [M+D1+D2+D3]. Trying to roll back back
>> [M+D1+D2+D3] before [N] will show the user a message about
>> dependencies.
>=20
> Shouldn't you be able to request rollback [M + D1 + D2+ D3 ] , but have=
the dependency of {something else not M} on D2 be detected, and therefor=
e D2 *not* uninstalled?
>=20
> you'd end up then with M, D1, D3 removed , D2 still installed (as N nee=
ds it), and a message saying 'D2 was not removed due to existing dependen=
cies : N '.=20
Yes, it's a good idea.
> As a matter of fact, i don't really see why we need a transaction syste=
m to have an option to {pkg management of choice} to uninstall {unwanted_=
pkg} and all other dependencies ONLY needed by {unwanted_pkg}. Anyway, pk=
g_cutleaves does part of it...but it'd be much handier, i think, to handl=
e it @ the uninstall time.
>=20
> And since we are just wishing for things, It'd be nice to have an oppor=
tunity to back off from a install/remove after calculating dependencies, =
such as that provided by yum (it shows everything it will do and asks for=
confirmation before proceeding. )
I like that in yum and have planned to include something like this. I'm=20
trying to decide should it be the default or not - for now, it probably=20
will be :)
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