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require "delegate"
module Augeas
class Change
attr_reader :target, :name, :delimiter
def initialize(target, name, value = nil, delimiter = "\"")
@target = target
@name = name
@value = value
@delimiter = delimiter
end
def to_s
"#{action} #{delimiter}target[. = '#{target}']/#{name}#{delimiter}#{value}"
end
def hash
[target, name, Change].hash
end
def ==(other)
other.is_a?(self.class) && [other.target, other.name] == [target, name]
end
alias_method :eql?, :==
private
def action
return "set" unless @value.nil?
"rm "
end
def value
" #{@value}" if @value
end
end
class ChangeSet
def initialize
@set = []
end
def <<(change)
index = @set.index(change) || @set.length
@set[index] = change
end
def to_a
changes
end
def changes
@set.map(&:to_s)
end
end
class TargetedChangeSet < DelegateClass(ChangeSet)
def initialize(target)
@target = target
super(ChangeSet.new)
end
def with(*args)
self << Change.new(@target, *args)
self
end
end
end
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