He's not dead, he's resting
A Glimpse Into cave: Mask and Use Flag Overriding for Resolves
For a long time, Paludis has been able to work out suggestions for what unmaskings you might want to do when installing a particular package that is either masked or has masked dependencies. This functionality is also present in the shiny new cave client, which uses the much more powerful new resolver. Now this functionality is also available for unmet use dependencies.
For example, rather than getting pages and pages of errors when attempting to install
You’ll now get:
Note how you are told all the suggested changes up-front. You aren’t just given a single error, which you can fix and then re-run the command to get another error and so on. Nor are you just given all the errors in the initial resolution; the resolver carries on with its suggested changes and accumulates any additional errors that will occur if you take those suggestions. In the first example,
parted isn’t mentioned at all in the initial set of errors, because it is only brought in to the resolution by
udisks, which is only brought in via
gnome-disk-utility, which is only brought in via
gvfs if the
gdu use flag is enabled, which we don’t have enabled by our config but that is required by
gnome. The resolver is smart enough to work all of this out upfront, sparing you from an eternity of running things over and over.
We’re still experimenting with the UI for errors — it’s probably possible to make it even easier for the user to see what changes need to be made. There have also been requests to make cave able to add the necessary lines to your configuration files automatically (after confirmation, of course). However, I’m not convinced that this is a good idea in practice — for example, cave would suggest turning a particular use flag on for a half dozen packages, but would not realise that turning it on globally may be a better option.