We Need A Way To Blacklist Plugins

[greenwoodma]

Twitter 8.6 no longer works properly (logic errors rather than exceptions) with GATE 8.7-SNAPSHOT or above but there is no way of flagging that to users. It would be nice to have a list of blacklisted plugins to prevent such issues. Probably a file like the metadata fils that list versions known not to work

[johann-petrak]

So if a plugin version about to be loaded is found on the blacklist, what would we want to happen? Throw an exception? Just logging a warning might be easy to overlook in some cases. Maybe throw an exception unless a property or environment variable is set to deliberately override?
Do we want to notice when a blacklisted version wants to get loaded after another non-listed version already has been loaded because then the working version would still get used, right?

[greenwoodma]

I'd want to make it impossible to load the plugin at all. It either wouldn't show up or would be an error in the plugin manager and so not manually loadable. If you tried to load an app that referenced it I'd want that to throw an exception and stop (just as if the plugin didn't exist) probably with a message to use the xgapp upgrade tool to move to a new version.