From owner-freebsd-questions@FreeBSD.ORG Tue Jan 31 12:19:00 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B48E11065824; Tue, 31 Jan 2012 12:19:00 +0000 (UTC) (envelope-from m.e.sanliturk@gmail.com) Received: from mail-tul01m020-f182.google.com (mail-tul01m020-f182.google.com [209.85.214.182]) by mx1.freebsd.org (Postfix) with ESMTP id 113E18FC1F; Tue, 31 Jan 2012 12:18:59 +0000 (UTC) Received: by obcwo16 with SMTP id wo16so7723830obc.13 for ; Tue, 31 Jan 2012 04:18:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=7AkmCgDk8litH6ZaTlAHu0qAclBjSSg00RkrJh3Am0Q=; b=NSfX1ilPwDSskie6DjO4vkJawqCnOlTkDSfKKPTGwrXyNmVu0hpZSdaIQ7gJfgUy1j lvgormuzxmlBC/Tn3Ygvg05fPaOc4Bn9UMJWI2vCxRWDqvYxWWyz1uGqqMOQ1zqRYfzF Rq+nv4xTaG7iTdPxRRXa86k51ekvZkJCLhYKk= MIME-Version: 1.0 Received: by 10.182.109.106 with SMTP id hr10mr35192883obb.27.1328012339561; Tue, 31 Jan 2012 04:18:59 -0800 (PST) Received: by 10.182.214.70 with HTTP; Tue, 31 Jan 2012 04:18:59 -0800 (PST) In-Reply-To: <20120131113735.GA59504@mech-cluster241.men.bris.ac.uk> References: <3009ECC2-E652-4CC2-AA84-C492115A3D3B@lpthe.jussieu.fr> <20120131105940.GA64098@azathoth.lan> <20120131113735.GA59504@mech-cluster241.men.bris.ac.uk> Date: Tue, 31 Jan 2012 07:18:59 -0500 Message-ID: From: Mehmet Erol Sanliturk To: Mehmet Erol Sanliturk , Baptiste Daroussin , Michel Talon , FreeBSD Questions Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Re: [Fwd: [HEADSUP][CFT] pkgng beta1 is out] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 31 Jan 2012 12:19:00 -0000 On Tue, Jan 31, 2012 at 6:37 AM, Anton Shterenlikht 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 >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