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| System: Linux host57.registrar-servers.com 4.18.0-513.18.1.lve.2.el8.x86_64 #1 SMP Sat Mar 30 15:36:11 UTC 2024 x86_64 Current Path : /opt/alt/ruby20/lib64/ruby/2.0.0/rake/ |
| Current File : //opt/alt/ruby20/lib64/ruby/2.0.0/rake/invocation_chain.rb |
module Rake
####################################################################
# InvocationChain tracks the chain of task invocations to detect
# circular dependencies.
class InvocationChain
def initialize(value, tail)
@value = value
@tail = tail
end
def member?(obj)
@value == obj || @tail.member?(obj)
end
def append(value)
if member?(value)
fail RuntimeError, "Circular dependency detected: #{to_s} => #{value}"
end
self.class.new(value, self)
end
def to_s
"#{prefix}#{@value}"
end
def self.append(value, chain)
chain.append(value)
end
private
def prefix
"#{@tail.to_s} => "
end
class EmptyInvocationChain
def member?(obj)
false
end
def append(value)
InvocationChain.new(value, self)
end
def to_s
"TOP"
end
end
EMPTY = EmptyInvocationChain.new
end
end