Dnia 2013-12-08, o godz. 17:56:12 Tom Wijsman <tom...@gentoo.org> napisał(a):
> Hello fellow developers > > == Situation == > > When specifying a dependency like cat/pkg it will default to cat/pkg:* > which is defined in `man 5 ebuild` as: > > * Indicates that any slot value is acceptable. In addition, > for runtime dependencies, indicates that the package will not > break if the matched package is uninstalled and replaced by a > different matching package in a different slot. > > This default reflects different behavior than what we use slots for, > besides allowing side-by-side installations we rather use it to > specifically depend on a new major version. (eg. dev-libs/glib). > > Let's say I want to a add a new major version of cat/pkg to the Portage > tree, introducing it in the same SLOT="0" isn't an option. This gives > us two options, one is SLOT="2", the other is to create cat/pkg2 or so. > > Creating a new SLOT is the most sane thing going forward; but, as the > default (:*) depends on any SLOT, this needs a half thousand commits to > fix up reverse dependencies. Thus, instead a new package is made. [1] > > When our defaults force us down such path, that can't be good and it > affects the quality of our Portage tree; so, this makes me wonder, can > we change the default from :* to :0? What do you think? > > [1] https://bugs.gentoo.org/show_bug.cgi?id=493652 > "media-libs/libsdl2: should be a SLOT=2 of media-libs/libsdl" > > == Task == > > If we agree we do this; in order to change :* to :0, we need to change > the PMS to cover this change and implement it in the package managers. > > Before we do that, we need to evaluate how practical this is to apply. > While we are trying to fix the default behavior, what would changing > the default from :* to :0 break? Packages that don't have SLOT=0 :). I was wondering about this some time ago and this is where I stopped. You can't simply assume every single package will have SLOT=0 as the default. -- Best regards, Michał Górny
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