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class Dependencies
include Enumerable
def initialize
@deps = []
end
def each(*args, &block)
@deps.each(*args, &block)
end
def <<(o)
@deps << o
self
end
def empty?
@deps.empty?
end
def *(arg)
@deps * arg
end
alias_method :to_ary, :to_a
def optional
select(&:optional?)
end
def recommended
select(&:recommended?)
end
def build
select(&:build?)
end
def required
select(&:required?)
end
def default
build + required + recommended
end
attr_reader :deps
protected :deps
def ==(other)
deps == other.deps
end
alias_method :eql?, :==
def inspect
"#<#{self.class.name}: #{to_a.inspect}>"
end
end
class Requirements
include Enumerable
def initialize
@reqs = Set.new
end
def each(*args, &block)
@reqs.each(*args, &block)
end
def <<(other)
if Comparable === other
@reqs.grep(other.class) do |req|
return self if req > other
@reqs.delete(req)
end
end
@reqs << other
self
end
alias_method :to_ary, :to_a
end
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