Do I have to manually uninstall all dependent gems?

Question

I tried to uninstall datamapper using the command gem uninstall dm-core.

But it seems that a whole bunch of dependent gems also need to be uninstalled.

Answer 1

If you would like to use some wild cards to remove some gems (e.g. to remove some gems from a specific vendor) then you can pipe the output from gem list to grep as shown below

gem list --no-version | grep "opener-" | cut -d " " -f1  | xargs gem uninstall -aIx

The above command removes all the gems whose name begins with "opener-"