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module Psenv
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class Environment
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def initialize(*variables)
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@variables = variables.reverse.reduce({}, :merge)
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end
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def apply
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@variables.each do |k, v|
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ENV.store(k.to_s, v) unless ENV.has_key?(k.to_s)
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end
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end
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def apply!
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@variables.each { |k, v| ENV.store(k.to_s, v) }
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end
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end
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end
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