From: Giulio  Piancastelli <giulio.piancastelli@...>
Date: 2005-03-23T01:59:52+09:00
Subject: Re: How to implement a new TaskLib in Rake

Jim Weirich wrote:

> If you can post the details of what you are doing, I'd be glad to
give a hand.

Well, I took another shot at a TaskLib implementation, and perhaps
found what was wrong with my code. Initially I wrote:

module Rake
  class FitTestTask < TaskLib
    attr_accessor :name, :libs, :pattern
    def test_files=(list)
      @test_files = list
    end
    def initialize(name=:fittest)
      @name = name
      @libs = ["lib"]
      @pattern = nil
      @test_files = nil
      yield self if block_given?
      define
    end
    def define
      puts "Running FitTest tasklib with #@libs and tests #@test_files"
      self
    end
  end
end

And rake aborted with the error message I reported. Then,
reimplementing, I noticed that you were actually *defining* a task in
TestTask#define, so I came up with:

def define
  task @name do
    puts "Running FitTest tasklib with #@libs and tests #@test_files"
  end
  self
end

This way, Rake runs fine, even if I don't understand the internal
mechanics. So, must every task in the lib be defined at once in a
method called by the constructor? The pattern usage of tasks seems to
suggest that (it's always Rake::SomeTask.new {...}) but I'd like to
hear more about this.

And... is it just *that* easy? Or are there other details I should be
aware of?

I'll try to define my tasks in a lib now; I'll get back to the
newsgroup if I happen to face some problems, perhaps harder to think
about than the latest. Sorry to bother.

Best Regards,
Giulio Piancastelli.