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On Tue, 2006-07-04 at 18:29 +0200, Robert Cernansky wrote: |
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> NR> new system, no gui installed. |
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> NR> |
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> NR> I install kde-meta, which installs xorg-x11 as a dependency. |
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> NR> |
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> NR> I decide I want gnome, I install gnome which doesn't install xorg, |
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> NR> because it is already installed. |
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> NR> |
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> NR> I decide I do not want kde because i prefer gnome. I unsinstall |
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> NR> kde-meta. Under your scheme it would also uninstall xorg-x11. But |
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> that |
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> NR> is not what you want! |
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> |
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> Hmm, it can be done with "garbage collector principe". Each |
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> package will have counter which increases when some package which |
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> depend on |
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> it is installed. Decreased, when the package is uninstalled. If |
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> counter is |
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> zero, "dependency" package can be uninstalled along with package |
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> specified |
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> for uninstalling. |
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|
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No, that still doesn't work. When the user unmerges kde-meta, with your |
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proposal it will unmerge X11. The next step is that the user emerges |
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gnome which first emerges X11 back again. This isn't so bad with a |
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binary distro if the packages are on a CD, but on gentoo it's murder. |
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|
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The only sane thing to do is to emerge dependencies when required and |
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unmerge only thinks specifically asked for to be unmerged. You can't |
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even reliably prompt the user with a dialog that says "The following |
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dependencies of the package about to be unmerged are needed by no other |
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package. Shall they be unmerged?" because of *deep* dependencies. |
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Reverse constructing a multi-node tree and applying logic to it is no |
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joke, hence the wise decision to have portage ignore this amazingly |
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efficient bug-injecting process. |
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|
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alan |
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|
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-- |
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