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Class: Rake::InvocationChain

Relationships & Source Files
Namespace Children
Classes:
EmptyInvocationChain
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, LinkedList
Instance Chain:
self, LinkedList, Enumerable
Inherits: Rake::LinkedList
Defined in: lib/rake/invocation_chain.rb

Overview

InvocationChain tracks the chain of task invocations to detect circular dependencies.

Constant Summary

LinkedList - Inherited

EMPTY

Class Method Summary

LinkedList - Inherited

.cons

Cons a new head onto the tail list.
.empty

The standard empty list class for the given LinkedList class.
.make

Make a list out of the given arguments.
.new

Instance Attribute Summary

LinkedList - Inherited

#empty?

Is the list empty? .make guards against a list being empty making any instantiated LinkedList object not empty by default You should consider overriding this method if you implement your own .make method.
#head, #tail

Instance Method Summary

LinkedList - Inherited

#==

Lists are structurally equivalent.
#conj

Polymorphically add a new element to the head of a list.
#each

For each item in the list.
#inspect

Same as #to_s, but with inspected items.
#to_s

Convert to string: LL(item, item…).

Constructor Details

This class inherits a constructor from Rake::LinkedList

Class Method Details

.append(invocation, chain)

Class level append.

[ GitHub ] 

  


# File 'lib/rake/invocation_chain.rb', line 28



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


  







Instance Method Details



  

    #append(invocation)  
  



  

    

Append an invocation to the chain of invocations. It is an error if the invocation already listed.


  



  [ GitHub ]


  

  


# File 'lib/rake/invocation_chain.rb', line 15



def append(invocation)
  if member?(invocation)
    fail RuntimeError, "Circular dependency detected: #{to_s} => #{invocation}"
  end
  conj(invocation)
end


  








  

    #member?(invocation)  ⇒ Boolean 
  



  

    

Is the invocation already in the chain?


  





  


  [ GitHub ]


  

  


# File 'lib/rake/invocation_chain.rb', line 9



def member?(invocation)
  head == invocation || tail.member?(invocation)
end


  








  

    #prefix   (private)
  

  [ GitHub ]


  

  


# File 'lib/rake/invocation_chain.rb', line 34



def prefix
  "#{tail} => "
end


  








  

    #to_s  
  



  

    

Convert to string, ie: TOP => invocation => invocation


  



  [ GitHub ]


  

  


# File 'lib/rake/invocation_chain.rb', line 23



def to_s
  "#{prefix}#{head}"
end