32 lines
711 B
Ruby
32 lines
711 B
Ruby
# frozen_string_literal: true
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module ExpandVariables
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class << self
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def expand(value, variables)
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variables_hash = nil
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value.gsub(/\$([a-zA-Z_][a-zA-Z0-9_]*)|\${\g<1>}|%\g<1>%/) do
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variables_hash ||= transform_variables(variables)
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variables_hash[$1 || $2]
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end
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end
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private
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def transform_variables(variables)
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# Lazily initialise variables
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variables = variables.call if variables.is_a?(Proc)
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# Convert hash array to variables
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if variables.is_a?(Array)
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variables = variables.reduce({}) do |hash, variable|
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hash[variable[:key]] = variable[:value]
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hash
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end
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end
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variables
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end
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end
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end
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