On Fri, 07 Nov 2014 20:57:41 +0100 Jauhien Piatlicki <jauh...@gentoo.org> wrote: > What;s wrong with input? PMS itself or how do maintainers write > ebuilds? Could you explain?
A mixture of both. Gentoo developers like writing eclasses that write unnecessarily clever, highly messy and technically incorrect dependency strings (see how Perl and Ruby are done, for prime examples). Doing this kind of thing well requires support from PMS, so developers can express what they want to say directly rather than via some convoluted mess of nested ||s, []s, slot abuse and faked range dependencies. However, it's currently culturally more acceptable to try to make yourself look clever by writing the new "world's most convoluted family of eclasses", so developers aren't asking for the features they need. In a way, this brings us back to SAT and CNF. Although you *can* encode this kind of thing in SAT (or rather, in QSAT...), the encoding is utterly opaque and doesn't lend itself to a good algorithm. The dependencies some developers are writing are nearly as bad. -- Ciaran McCreesh
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