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Am 06.06.2010 13:09, schrieb Matti Bickel: |
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> On 06/06/2010 12:40 PM, Thomas Sachau wrote: |
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>> My base proposal for this is something like this: |
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>> |
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>> Every package defines the language(s), where it could be installed for multiple slots, e.g.: |
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>> |
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>> MULTI_SLOT="python" or |
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>> MULTI_SLOT="python ruby" |
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>> |
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>> Additionally, it should define the supported slots, something like this: |
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>> |
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>> SUPPORTED_RUBY_SLOTS="1.8 1.9" or |
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>> SUPPORTED_PYTHON_SLOTS="2.5 2.6 3.0 3.1" |
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> |
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> Don't get me wrong, but isn't that what the python developers guide[1] |
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> says? ("python.eclass supports PYTHON_DEPEND helper variable, which |
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> allows to specify minimal and maximal version of Python.") |
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> |
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> I thought the whole point of this debate was that nobody cared enough to |
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> convert all those ebuilds to use PYTHON_DEPEND properly. The proper fix |
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> is to convert ebuilds to the new syntax. |
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> |
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The current python eclass also uses some vars to specify the supported slots, yes, but it is more |
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complex and harder to maintain in addition to the fact, that the dependency part is hidden from the |
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package manager. |
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I dont think, that you can tell portage with the current implementation, that it should only install |
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python modules for python-2.6 by default and additionally python modules for python-3.1 for selected |
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packages. Portage will also install newer slots of python, even when the user does not request them |
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and no package requires them, which will result in unneeded and unused versions on disk. |
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And if you add a python slot or remove one, portage currently is not able to see that and to |
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reinstall packages, which had modules installed for that slot. You need another tool |
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(python-updater) to check that and to call the needed reinstalls. |
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With my solution, there are only modules installed for selected slots. And if you have selected a |
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slot, the related python version is pulled in by portage. If you disable that slot, you can |
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reinstall those packages with --newuse option and then can remove that python slot with --depclean. |
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No need for another tool, simple handling by the package manager |
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-- |
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Thomas Sachau |
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|
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Gentoo Linux Developer |
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