Am 06.06.2010 09:37, schrieb Michał Górny: > On Sun, 06 Jun 2010 04:19:28 +0200 > Sebastian Pipping <sp...@gentoo.org> wrote: > >> Thomas, >> >> >> On 06/06/10 04:01, Thomas Sachau wrote: >>> Since python-3* is currently useless and not required for any >>> package, the dependency should by default only pull in python-2* >>> like this: >>> >>> =dev-lang/python-2* >>> >>> With that, the default way would not pull in a package, which is >>> not needed or used. And if there will be any package, which really >>> requires python-3*, it simply requests it in (R)DEPEND of the >>> ebuild, which then would overwrite the default value of the eclass >>> and pull in python-3*. >> >> That's an interesting idea. > > It sounds quite pointless to me. Forcing the packages to assume they > don't support the newer version just because nothing requires it yet?
This is not about forcing a python-2* dependency, it is just about setting a sane default. We still have many python related packages, which dont work with python-3, but i dont know of packages, which dont work with python-2. So a sane default would be to require python-2, when nothing else is set in the ebuild instead of assuming, that it works for every version including python-3. You can always overwrite this dependency in the ebuild, so you dont force anything. > >>> Are there any reasons to pull in a package, which is not requested >>> by the user, not required by any package and by default not used by >>> any package? >> >> That a question I haven't seen answered before, either. Arfrever? > > It _is_ requested by user. User requested upgrade of all dependant > packages, and here it goes. Before python-3 got introduced, packages, which only support python-2, did just inherit python or distutils eclass and did not depend on python, because this dependency was in the eclass. Now with the introduction of python-3, this dependency string will introduce python-3, also those packages where not tested with python-3 and probably wont work with it. As a user, i expect a world update to update/install all needed and required packages. python-3 is neither required, nor needed or used, it is a complete optional dependency and should be handled like that, see my other mail with a possible way to handle it. -- Thomas Sachau Gentoo Linux Developer
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