Class: SC::InvocationChain

Inherits:
Object
  • Object
show all
Defined in:
lib/sproutcore/buildfile/invocation_chain.rb

Overview

InvocationChain tracks the chain of task invocations to detect circular dependencies. Borrowed from Rake 0.8.3

Defined Under Namespace

Classes: EmptyInvocationChain

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value, tail) ⇒ InvocationChain

Returns a new instance of InvocationChain.



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# File 'lib/sproutcore/buildfile/invocation_chain.rb', line 13

def initialize(value, tail)
  @value = value
  @tail = tail
end

Class Method Details

.append(value, chain) ⇒ Object 



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# File 'lib/sproutcore/buildfile/invocation_chain.rb', line 37

def self.append(value, chain)
  chain.append(value)
end

Instance Method Details

#already_invoked?(task) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sproutcore/buildfile/invocation_chain.rb', line 22

def already_invoked?(task)
  (task == @value) || @tail.already_invoked?(task)
end

#append(value) ⇒ Object 



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# File 'lib/sproutcore/buildfile/invocation_chain.rb', line 26

def append(value)
  if member?(value)
    raise "Circular dependency detected: #{to_s} => #{value}"
  end
  self.class.new(value, self)
end

#member?(obj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sproutcore/buildfile/invocation_chain.rb', line 18

def member?(obj)
  @value == obj || @tail.member?(obj)
end

#to_s ⇒ Object 



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# File 'lib/sproutcore/buildfile/invocation_chain.rb', line 33

def to_s
  "#{prefix}#{@value}"
end