5 Aug
2020
5 Aug
'20
6:35 p.m.
On Wednesday 05 August 2020 12:44:04 pm Slávek Banko wrote:
Dne st 5. srpna 2020 Dr. Nikolaus Klepp napsal(a):
Thank you Slávek!
I've never used aptitude interactively (or even knew you could). That
definitely makes life easier.
Doesn’t fix my, “I want my cake and eat it too” package thoughts, but that’s
mostly from my not understanding how the package management system handles
dependencies. If I get it, to do what I want, then tde-trinity (and I guess
every other TDE metapackage) would need everything in depends moved to
recommends and the install instructions changed to:
aptitude install --install-recommends tde-trinity
Since that’s not done, there’s more than likely issues doing it that way
(besides just messing up legitimate recommends). I’m sure I’m not the first
person who wanted to keep the metapackage after removing one of its
components.
My cake is pretty, my cake is yummy! Why can’t I eat it and have it too?
Typical User,
Michael
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Anno domini 2020 Wed, 5 Aug 19:29:49 +0200
In aptitude you can "enter" the metapackage using the Enter key, move to
depends and then press "m". This will switch all packages in the list
to "manual".
At the same time, there is an 'overview step' in aptitude before performing
both installation and uninstallation - after pressing 'g'. There it is
possible to notice the situation and make changes in the selection of
packages. Alternatively, go back - by pressing 'q' and continue
selecting / deselecting packages. Metapackages are good at installation, but poor
servant during the
removal of individual packages.
For metapackages to work well for installation, there is a need for a
hard dependency - Depends. If a looser dependency - Recomends - were
used, the result could be that virtually nothing would be installed
when the default apt setting is "without recommends". And here is the
beginning of the problem. If a user wants to remove a package that is
referenced by a metapackage, this will cause the metapackage to break
=> leads to its uninstallation and thus to the uninstallation of all
other packages referenced by the metapackage.
Therefore, before removing a metapackage, all referenced packages need
to be switched to "manual" so that they are retained even if the
metapackage is removed. This is more difficult to do manually with
commands - it's much easier to use aptitude.
How do you do that with aptitude?