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On Fri, 23 Jul 2010 12:30:35 +0000
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"Jorge Manuel B. S. Vicetto" <jmbsvicetto@g.o> wrote:
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> > In any case, abusing DEPEND isn't a mechanism for implementing use |
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> > requirements. You should use the mechanism that's designed for use |
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> > requirements to do use requirements, which means waiting for EAPI 4 |
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> > and pkg_pretend, or just follow existing policy and pick one in the |
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> > case of a conflict. |
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> |
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> Abusing depend is a good way to do this, until we get better tools. |
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No, it's not, because it doesn't work. Assuming self deps are legal in
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the || ( myself myself-bin ) case, they can't do what you want for use
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requirements. myself[foo] would be met when building with USE=-foo so
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long as myself[foo] was installed originally, and it wouldn't be met
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unless myself were already installed.
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> I have to agree with Brian's proposal and say that in this particular |
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> case, the best solution is required_use and not pkg_pretend. |
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required_use may theoretically allow a package manager to do cycle
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breaking if all the relevant packages are updated to export information
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about which flags are and are not safe to toggle, but since no-one's
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proposed exporting that information or has even worked out exactly what
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the requirements would be for that to happen, and since pkg_pretend is
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required anyway for other things, just going with pkg_pretend for now
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is the sensible solution.
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Of course, this is all irrelevant since at the current rate of progress
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Portage is two years off any of this being available for developers
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anyway...
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- --
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Ciaran McCreesh
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