adding custom hooks to tasks

[Diggory Hardy]

Hello list,

I'm trying to add some extra operations to tasks. What I'm doing at the moment 
is:

define 'myproject' do
        ...
        package(:jar).tap to |jar|
                # do stuff here
                ...
        end
end

but I notice that these operations happen even when not running the 'package' 
task — even when I run 'buildr clean'! On the contrary, if I remove the '.tap' 
bit my code never gets run.

Actually, that appears to be the case for the 'package' task. Same if I remove 
the '(:jar)' part. But for the 'compile' task, this works fine (only run when 
compiling):

compile do ||
        # extra stuff...
end

So what gives with the 'package' task?

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