InvocationChain tracks the chain of task invocations to detect circular dependencies.
# File lib/rake/invocation_chain.rb, line 27 def self.append(value, chain) chain.append(value) end
# File lib/rake/invocation_chain.rb, line 7 def initialize(value, tail) @value = value @tail = tail end
# File lib/rake/invocation_chain.rb, line 16 def append(value) if member?(value) fail RuntimeError, "Circular dependency detected: #{to_s} => #{value}" end self.class.new(value, self) end
# File lib/rake/invocation_chain.rb, line 12 def member?(obj) @value == obj || @tail.member?(obj) end
# File lib/rake/invocation_chain.rb, line 23 def to_s "#{prefix}#{@value}" end
# File lib/rake/invocation_chain.rb, line 33 def prefix "#{@tail.to_s} => " end