Delete old versions in cleanup

[j6s]

Hi.

This somewhat ties in to the upgrade diskussion:
I just updated my applications by force installing them. This lead to multiple versions on my machine.

I would have /opt/homebrew-cask/Caskroom/pycharm/3.3.x/ and /opt/homebrew-cask/Caskroom/pycharm/3.4.x/.
On a small SSD this has the potential to litter the HDD.

It would help, if cleanup would try to delete older versions (or a full fledged upgrade)

[rolandwalker]

Hi! I agree with you of course. But currently the code doesn't actually track the previously-installed versions, so it doesn't know exactly what to delete.

There is a user script at https://github.com/caskroom/homebrew-cask/blob/master/developer/examples/brewcask-doutdated.rb which works in some cases, but not all.

We are working on the necessary bookkeeping though. See #3066 .

[Whirlwind]

Hi @rolandwalker , How should I run the script ? in irb?

[rolandwalker]

Sorry, but the scripts in developer/example are unsupported examples, intended to help you make your own personal commands if you want to develop them privately.

The documentation on how they work is in HACKING.md.

The commands which we can support are available already as brew cask <verb>.

[vitorgalvao]

No longer relevant: #13201.