On Sat, 23 Oct 1999, Daniel Burrows wrote: > Here's what I'd like to know (two things): > > -> pkgDepCache::MarkInstall appears to automatically and recursively install > dependencies if AutoInst is set to true. Is there any way to find out what > it has done? That is, I'd like to get a list of packages whose state has > magically changed. I suppose I could just keep my own copy of each > package's > status, but that seems a little..erm..ugly.
Several people have asked for this, but in general it is not really an easy thing to do [think about the problem resolver for instance]. Each caller will want to basically checkpoint then do some operations then get a report of the changes - keeping track of them while running is not reasonable due to all of the backtracking so I suggest that keeping an array of the package status is the best route, it is cheap, simple and handles all possible cases. > Also, if the user tries to do something that's not possible or where a > choice can be made, how can I find out? (eg, where one of several packages > can be installed to fulfill a dependency) Or is this Not Relevant? (as > I wrote this question I thought of a [perhaps] better way to handle this > than > what I was thinking :) ) In the event of a choice APT [via provides] apt selects one more or less at random. > -> What exactly does the Soft argument to pkgDepCache::MarkKeep do? It toggles the autokept flag which isn't presently used by anything at all. > -> How can I change the `target version' and/or `target dist' of a package? > I > see lots of different ways to query it, but no way to modify it (eg, so the > user can say "downgrade this package to an older version"). You must subclass the depcache and provide your own version of the function 'GetCandidateVer' Jason
