[Fwd: [HEADSUP][CFT] pkgng beta1 is out]

[Mehmet Erol Sanliturk]

On Tue, Jan 31, 2012 at 6:37 AM, Anton Shterenlikht <mexas at bristol.ac.uk>wrote:

> On Tue, Jan 31, 2012 at 06:06:33AM -0500, Mehmet Erol Sanliturk wrote:
> > On Tue, Jan 31, 2012 at 5:59 AM, Baptiste Daroussin <bapt at freebsd.org
> >wrote:
> >
> > > On Tue, Jan 31, 2012 at 11:52:05AM +0100, Michel Talon wrote:
> > > > >having a real sat solver for the dependency tree.  Currently we
> have a
> > > > >really simple and minimalistic solver which works well but if we
> can to
> > > go
> > > > >to an even finer package management we would need a real solver.
> > > >
> > > > Please may you expand on what you really mean here? I was under the
> > > impression
> > > > that the only problem was to provide a total order on ports
> compatible
> > > to the
> > > > partial order fixed by dependency, and this is very easy. There is
> for
> > > example one
> > > > routine to do that in portupgrade. Or do you have something more
> > > sophisticated in mind?
> > > >
> > >
> > > I mean something more sophisticated, the simple thing having things in
> the
> > > right
> > > order is hopefuly already done in pkgng :)
> > >
> > > I mean more something that is able to go further like resolving some
> > > conflicts
> > > by changing the ordering automatically, like offerting the ability to
> > > depends on
> > > provides e.g. depends on http_server instead of depending on
> > > apache/lighttpd/nginx/thehttpyouprefer or begin able to depends on
> > > feature. An
> > > even more.
> > >
> > > What we have now is really enough to be able to go into a full binary
> > > world (and
> > > it does really work nicely) but having a real complex sat solver, can
> help
> > > us go
> > > forward and imagine an even better package tool.
> > >
> > > regards,
> > > Bapt
> > >
> >
> > sat solver :
> >
> > http://en.wikipedia.org/wiki/ZYpp#SAT_solver_integration
> > http://en.wikipedia.org/wiki/Boolean_satisfiability_problem
> >  http://en.wikipedia.org/wiki/Computational_complexity_theory
>
> wow.. that's hardcore computer science.
> You mean something like this:
>
> http://minisat.se/
> http://www.st.ewi.tudelft.nl/sat/march_dl.php
>
> but BSD licensed?
>
> --
> Anton Shterenlikht
> Room 2.6, Queen's Building
> Mech Eng Dept
> Bristol University
> University Walk, Bristol BS8 1TR, UK
> Tel: +44 (0)117 331 5944
> Fax: +44 (0)117 929 4423





Yes .

Thank you very much .

Mehmet Erol Sanliturk