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

Just list all the gems you want to uninstall e.g. gem uninstall dm-migrations dm-cli dm-observer. And try to manage your gems with Bundler whenever possible.

Answer 2

gem cleanup should do the trick. See here for details.

Answer 3

for gem in `gem list --no-version`; do
  gem uninstall -aIx $gem
done

Works the best for me, not sure why but

gem list | cut -d" " -f1 | xargs gem uninstall -aIx

doesn't work on my system as it still complains...

ERROR:  While executing gem ... (Gem::InstallError)
    cannot uninstall, check `gem list -d some-gem-here`

Answer 4

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-"

Answer 5

gem list | cut -d" " -f1 | xargs gem uninstall -aIx deletes all installed ruby gems!

Answer 6

As far as I know you're correct, there is not an easy way built-in to the gem command to do this.

However, you can check out gem-prune which can help clean up your gem repository after you've removed dm-core.

http://github.com/ddollar/gem-prune/tree/master