On Fri, Apr 28, 2006 at 05:50:21PM +0300, Panu Matilainen wrote: > On Fri, 2006-04-28 at 08:43 -0500, Steven Pritchard wrote: > > Stupid question, but how hard would it be for a depsolver to work this > > out in reverse? For example, xmms-sid requires xmms, so when I'm > > installing xmms, notice that xmms-sid requires it, and suggest it as a > > possible enhancement? > > I've thought about this - getting the reverse dependencies is not hard > at all, basically the depsolver could do the equivalent of this: > > [root@weasel ~]# repoquery --whatrequires --alldeps perl-Kwiki [...] > What's problematic with this approach is that it only works for certain > types of packages, something resembling an application in other words. > Try it on a library and the results are probably not what you want. So how would you fix that? Walk through all the file provides/requires and all the other implicit dependencies? And if you did all that, how painful would it be? :-) > Taking perl-Kwiki as an example, it lists "Development/Libraries" as > it's rpm group, That's because cpanspec is hard-coded to add that Group: tag. > it doesn't belong to any comps groups That's because I haven't added any of my packages to comps. (Shame on me, I know, it's on my todo list.) > and it doesn't look like an application in the sense that it doesn't > put anything into your path There's just the "kwiki" script in /usr/bin/... > (which is a very bad heuristics anyway since many library packages > have some utility binaries) etc. It'd be very likely to be classified > as a library of sorts by any obvious heuristics to determine whether > "suggests/enhances"-reverse depends logic should be applied. Even having this available as a convoluted command involving repoquery would be pretty cool. :-) > That's what Enhances is all about: the main package wouldn't have to be > aware of those other packages, those plugin packages would just have to > add "Enhances: perl-Kwiki". Ah, my sleep-deprived mind was reading that backwards. That makes a whole lot more sense. ;-) Steve -- Steven Pritchard - K&S Pritchard Enterprises, Inc. Email: steve@xxxxxxxxx http://www.kspei.com/ Phone: (618)398-3000 Mobile: (618)567-7320 -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
