Re: [gentoo-dev] Dynamic SLOTs

[Jason Stubbs]

On Friday 06 August 2004 20:56, Paul de Vrieze wrote:
> On Saturday 31 July 2004 08:46, Mike Frysinger wrote:
> > On Saturday 31 July 2004 12:09 am, Jason Stubbs wrote:
> > > I added support for USE-based SLOTs to
> > > support the third and fourth.
> >
> > i know this is off topic of your e-mail, but could you go more into depth
> > on this ?
> > CHOST / CCHOST / cross compiling dynamic SLOTs interest embedded very
> > much -mike
>
> I'm working on my own portage_ng version. It includes a c++ parser that
> replaces the bash cruft, is a lot faster, and parses most existing ebuilds.
> (compilation etc. still happens in bash) (It does not allow at all dynamic
> behaviour on the toplevel, but it will include a much more flexible
> dependency structure. On top of that the parser itself does not (yet at
> least) perform the variable substitution, so the variables are still
> available for reading. Once I get to that point I will also include some
> kind of dynamic slot/ multislot feature based on some conditions. It will
> certainly allow multiple installation of the same version of the same
> package (think crosscompiling, php for apache1 and apache2) given that they
> have different MULTISLOT values

Are you going to share information or just offer another sales pitch? For 
example, what algorithm(s) are you going use to handle the following?

pkg-a-1.0:SLOT="foo? ( 2 ) !foo ( 1 )"
pkg-a-1.1:SLOT="foo? ( 1 ) !foo ( 2 )"
pkg-b-1.0:DEPEND="foo? ( pkg-a:2 )"
pkg-c-1.0:DEPEND="pkg-b[foo]"
USE="-foo" emerge pkg-c

How about if pkg-a is installed in both slot 1 and slot 2 and the user issues 
"emerge -u pkg-a" ?

How about if we add pkg-d-1.0:DEPEND="pkg-a[-foo]" and the user issues
"emerge pkg-c pkg-d" ?

All those have a definite solution, but doing it in code that isn't as slow as 
hell is another matter.

Regards,
Jason Stubbs

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