On Wednesday, June 9, 2010, Dima Pasechnik <dimp...@gmail.com> wrote: > Well, I saw upgrades fail repeatedly, and William was writing here > that -upgrade is basically not ready > for prime time use. > > Indeed, one needs to have at least an spkg dependencies mechanism in > place, before -upgrade > can be done in a fool-proof way. At the moment it is adhoc - an spkg > can be checking that another spkg is there and has version at least > something, but this is not supported in any consistent way, e.g. like > it is done with Debian packages. > I.e. there is no declarative facilities in place that would allow one > to specify such an interdependency, > they rather need to be hard-coded into the spkg install script. >
False. For the 99 standard spkg's, the dependencies are declared in spkg/standard/deps, which is a makefile. > So one needs to develop/adopt such a scheme, before -upgrade can be > made safe... > And I imagine replies here saying that it would increase the > complexity of Sage, without adding any new useful functionality. > I can only say that in the long term it would save developers time, to > have such a scheme in place... > > Dima > > On Jun 9, 11:10 am, David Kirkby <david.kir...@onetel.net> wrote: >> On 6 June 2010 11:47, François Bissey <f.r.bis...@massey.ac.nz> wrote: >> >> >> >> >> >> >> On 06/ 6/10 10:53 AM, François Bissey wrote: >> >> >>> You could also try >> >> >> >>> sage -ba >> >> >> >>> which will rebuild from scratch all Cython code. >> >> >> >> OK I will give it a go. >> >> >> > No improvement. I am considering this upgrade officially failed >> >> > on my machine. >> >> >> > Francois >> >> >> Can anyone tell me what happens in a 'sage -upgrade'? I'm puzzled why this >> >> can't be made to work. I would have thought as a minimum one would need to >> >> >> 1) Rebuild any new standard packages. >> >> 2) Rebuild any standard package which depends on another package which has >> >> been upgraded. >> >> 3) Rebuild the library. >> >> >> Is '(2)' being done? If not, I suspect it would be more reliable. >> > I would think it is done that way. Although sometimes there are >> > difficulties. >> > It's possible that I didn't actually found the right culprit in this case. >> > pynac only depends on python so there's not much to rebuild. >> > The list of updated package is very short so this is puzzling but bugs >> > in upgrading system happen. Possibly in this case something went subtly >> > wrong from 4.4.1->4.4.2->4.4.3 >> >> It just that >> >> a) Permitting upgrades, rather than a total reinstall, was a good idea >> of William's. (At least I think it was his idea. If not, I apologise >> to whoevers idea it was). >> b) It sometimes fails, which makes it far less useful. >> c) When it does fail, you end up with a screwed up installation of Sage. >> d) Other projects seem able to manage upgrades. I've never had an >> upgrade of Firefox or Thunderbird fail, despite I allow automatic >> updates. >> >> I've had updates of OpenSolaris fail, but in that case it does at >> least clone the boot environment first, so if the upgrade fails, one >> just picks the previous entry on the grub menu, and one goes back to >> the previous version of the operating system. The system is >> unavailable for only the time it takes to reboot. twice - first to the >> failed installation, then back to the previous installation. One can >> continue to use the operating system during the upgrade, just as one >> can with Windows live updates. >> >> Dave >> >> Dave > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
