On Tue, 15 Jun 2010, Steve Langasek wrote: > On Tue, Jun 15, 2010 at 06:51:34PM -0700, Russ Allbery wrote: > > > > But it's also overly aggressive, since it forces 'a' version 2 to be > > > unpacked first, *before* unpacking package 'b' - in which case, what do > > > we need the Replaces: for at all? This is really a workaround for the > > > fact that Breaks: didn't exist at the time this part of Policy was > > > written. With Breaks: a (<< 2) and Replaces: a (<< 2), we can force the > > > upgrade of 'a' in tandem with 'b', but without imposing the unpack > > > ordering constraints that cause such big problems for dist-upgrades. > > > Ah, aha. (This should definitely be explained in Policy, at least in a > > footnote.) > > Yes, I agree. > > > So that implies that, for the typical case of moving a file from one > > package to another, we should use Replaces/Breaks, and reserve Conflicts > > for actual file conflicts between unrelated packages (such as libkrb5-dev > > and heimdal-dev). Is that correct? > > That's how I understand it, yes.
Having re-read the discussions, I also think that it's the desired outcome. We might want to separate two cases however: 1/ splitting a package (i.e. moving files in a new package) 2/ moving files to another pre-existing packages The first is best served with: Package: foo Depends: foo-data Package: foo-data Breaks: foo (<< X) Replaces: foo (<< X) The latter would also require a Breaks: foo-data (<< X) on foo to forbid a downgrade of foo-data without downgrading foo. But I have never seen this used in practice and I don't know whether packages managers cope well with this (at least they should, Breaks only impose a deconfiguration before being able to continue). Cheers, -- Raphaël Hertzog Like what I do? Sponsor me: http://ouaza.com/wp/2010/01/05/5-years-of-freexian/ My Debian goals: http://ouaza.com/wp/2010/01/09/debian-related-goals-for-2010/ -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
