* Florian Philipp <li...@binarywings.net> wrote: > However, what you want can still be done without touching the ebuilds > because it would really just be an alias for `emerge --one-shot > <new_alternative> && emerge --depclean <old_alternative> && > revdep-rebuild` (in the easiest, non-blocking case).
No, this isn't enough. I want an stable method which never leaves the system in an inconsistent state. When revdep-rebuild is required, there's normally a period of time where some installed packages are broken (okay, preserved-libs makes it better), exactly what I never want on a productive system. > I personally wouldn't want to automate this. The problem is that > different virtuals need different switching strategies. Converting from > jpeg to jpeg-turbo is relatively straight-forward. Switching between > httpd-basic implementations, on the other hand, needs manual work to > carry over config files and such. I didn't intend to do this fully automatic, for all virtuals. Just a bunch of special ones which just handle the scenarios of exchanging libraries (also on different/incompatible ABIs). > Maybe it would be a better idea to teach emerge to warn the user when a > default virtual implementation is about to be installed and show the > different alternatives. Similarly emerge --sync or eix-sync could inform > the user when a new alternative package for an already installed virtual > is available. Indeed, that would be a good feature. > Isn't that problem resolved in portage-2.2 by keeping the old library > file around until all packages have been re-emerged? The preserve-libs stuff ? I'm not sure how it actually works under the hood, but as far as I can see it, it's just done for certain critical libs yet (eg. openssl), and the package manager doesn't know much of it, just keeps certain files around. So manual revdep-rebuild runs and removals of old libs is still required. cu -- ---------------------------------------------------------------------- Enrico Weigelt, metux IT service -- http://www.metux.de/ phone: +49 36207 519931 email: weig...@metux.de mobile: +49 151 27565287 icq: 210169427 skype: nekrad666 ---------------------------------------------------------------------- Embedded-Linux / Portierung / Opensource-QM / Verteilte Systeme ----------------------------------------------------------------------
