On Nov 20, 2008, at 3:02 PM, Shawn Walker wrote:
> Jonathan Edwards wrote:
>> On Nov 19, 2008, at 7:39 PM, Bart Smaalders wrote:
>>> Ed McKnight wrote:
>>>> Suggestion: IPS to implement a package attribute,
>>>> 'metapackage=true,'
>>>> which would mean that the contained dependencies would be treated
>>>> as
>>>> reversed during uninstall, thus enabling the dependencies both to
>>>> be
>>>> automatically installed and uninstalled. Maybe there should be
>>>> enforcement that nothing other than dependencies are contained,
>>>> but I'm
>>>> not sure it's necessary.
>>>>
>>> We've talked about this; it's probably actually an attribute of the
>>> dependency or a different type of dependency rather than an
>>> attribute
>>> of the containing package.
>>>
>>> Some of this is waiting on our completion of capturing user intent,
>>> for the following reason:
>>>
>>> pkg install foo
>>> pkg install bar, which has a "meta-dependency" on foo
>>> pkg uninstall bar
>>>
>>> should not uninstall foo, whereas in the case of:
>>>
>>> pkg install bar, which has a "meta-dependency" on foo
>>> pkg uninstall bar
>>>
>>> it should... we cannot do this correctly w/o recording user intent.
>> how about something like:
>> pkg uninstall -r foo
>
> We already have -r. Are you saying it should change somehow, or are
> you suggesting that's what someone should use?
okay - so if we have recursive uninstall, i'm not so sure i understand
what the particular problem is .. in other words, if we just view
metapackages (or i've always preferred metaclusters) as a top node
package that includes require dependent packages then i think you've
already got your mechanism for uninstalling clusters and forcing with
the recursive if the package wasn't installed as part of the
metacluster (perhaps a family tag to denote)
and sorry - i was reading the above example backwards (late nights) ..
so in the above example you've really got a metacluster "bar" and
package "foo" which is part of the metacluster:
case #1:
- pkg foo is already installed on the system
- you install metacluster bar
pkg uninstall bar <- won't uninstall foo
pkg uninstall -r bar <- will uninstall foo
case #2:
- pkg foo is not installed on the system
- you install metacluster bar
pkg uninstall bar <- will uninstall foo as foo will have the
metacluster family tag
use -n to flag warnings, and add a mechanism to add things or remove
things from family sets and i'd think you'd be all set.
on a side note though - i would find it quite helpful to see some sort
of text visualization of indented clusters along with packages that
might be incorporated in the cluster .. and perhaps packages that
weren't installed as part of the cluster (or tagged as part of the
family .. in-laws if you will):
- pkgcluster bar
[foo]
fu
fhoo
phoo
---
.je
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