pre "chaining" appears to be broken

[discount-elf]

When utilizing the following code via collection 'test' precheck() never executes. If all the methods are specified in pre via default= then the expected behavior is observed.

   from invoke import task

    @task
    def precheck():
        print("Preing")

    @task(pre=['test.precheck'])
    def check():
        print("Checking")

    @task(default=True, pre=['test.check'])
    def run():
        print("Defaulting")

[bitprophet]

Related to #123 though a bit different.

Not sure this angle has been tested/thought about either; I would assert that you don't want the tasks to have to know "which" collection they're in at the moment, in case that changes/gets renamed/etc.

Meaning the above should turn into eg @task(pre='precheck') (n.b. you can just skip 'pre' and say @task('precheck')) and we should ensure the code correctly handles this (I'm not sure it would at the moment.)

[discount-elf]

Well I tried that and it errored out with a task not found error when the task was not namespaced.

[bitprophet]

At this point in time the string version of pre-task declaration is dead, so that removes that part of the confusion.

While redoing the pre-task stuff, there's definitely situations that are broken which resemble the above (e.g. a pretask of a pretask is not executed). Will be ensuring that this case works before the new functionality is released. (See also #123)

[bitprophet]

Pre-emptively closing this now that the work is basically all done. Using #123 as the place to keep final notes as I wrap it up.