Determine when uninstall stanza is run explicitly by user?

[mschrage]

I'm the maintainer of the fig Cask and I've been trying to find a way to replicate the behavior of our app uninstall flow.

Context

If a user runs fig uninstall or moves the app to the trash, we take the user to fig.io/uninstall in order to gather some additional feedback.

I've tried to replicate this behavior in our cask as part of the fig app uninstall script. In the process, I've realized that the uninstall stanza is invoked in many situations, not just when the user runs brew uninstall fig.

Question

Is there any way to distinguish when uninstall stanza is run explicitly by user as in brew uninstall fig vs when it is run on behalf of the user, for instance, when the user runs brew upgrade or brew brew reinstall fig.

If not, is this functionality you'd be open to supporting? (I could imagine this information exposed as an environment variable that is set while the script and early_script are executed).

[SMillerDev]

No, that's what zap stanzas are for.

[mschrage]

I don't think it is possible to do what we want with a zap stanza, since we can't handle the case where the user runs brew uninstall fig any differently from brew upgrade?

My sense is that many (most?) users uninstall casks by running brew uninstall <cask> and omit the --zap.

[carlocab]

Homebrew Cask was designed to allow you to manage your installations purely from a CLI, so taking users away from the CLI when they don't expect probably isn't welcome, and might cause errors in certain situations (e.g. when logged in via ssh with no attached GUI). So I don't think supporting this is something we can do.

I'm not opposed to adding a message in the caveats, though. But this does have the shortcoming of not being displayed after brew uninstall.