How to find out which collection a task was called from?

[dannyadair]

Can I find out inside the task call which collection the task was accessed from?
Or do I have to dissect sys.argv?

It seems there is a disconnect, how can I get from a Task to "its" Call or Executor?
Thanks for any pointers!

Background: I'd like to introduce constraints, e.g. every task in the "dev" collection tree can only be called if the current environment is a dev environment. Doing this with a custom task decorator means I have to define per-task and also can't add/import tasks without retro-fitting the correct constraint.