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On 04/27/2012 11:26 AM, Zac Medico wrote:
> In order to be practical, I guess we'd have to add a constraint
> which says that if KEYWORDS contains the stable variant of a
> particular keyword, then it should also be considered to implicitly
> contain the unstable variant when the package manager is deciding
> whether or not to apply package.use.{mask,force}.
>
> So, here's a description of the whole algorithm that I'd use:
>
> 1) Let EFFECTIVE_KEYWORDS equal the set of values contained in
> KEYWORDS, plus ** and all the unstable variants of the stable
> values contained in KEYWORDS. For example:
>
> KEYWORDS="~amd64 x86" -> EFFECTIVE_KEYWORDS="~amd64 x86 ** ~x86"
>
> 2) Intersect EFFECTIVE_KEYWORDS with effective ACCEPT_KEYWORDS,
> where effective ACCEPT_KEYWORDS includes any relevant values from
> package.accept_keywords. For example, here is a table of
> intersections of EFFECTIVE_KEYWORDS="~amd64 x86 ** ~x86" with
> various effective ACCEPT_KEYWORDS values:
>
> ACCEPT_KEYWORDS | INTERSECTION | package.stable
> ----------------------------------------------------- x86
> | x86 | yes x86 ~x86 | x86 ~x86 | no **
> | ** | no amd64 ~amd64 | ~amd64 | no
>
> 3) Apply package.stable settings if INTERSECTION contains only
> stable keywords. For example, see the package.stable column in the
> table above.
This algorithm better matches what I meant in my earlier posting, so
+1 from me. (And if anyone has an ACCEPT_KEYWORDS value of "~amd64
- -amd64", they deserve any issues that may arise).
The only issue I have with it is that EFFECTIVE_KEYWORDS should be
expanded to contain "*" if any stable keyword is present and "~*" if
any unstable keyword is present (or "*" and "~*" in ACCEPT_KEYWORDS
should be pre-expanded).
- --
Jonathan Callen
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