Module: Cucumber::CiEnvironment::VariableExpression

Included in:
Cucumber::CiEnvironment
Defined in:
lib/cucumber/ci_environment/variable_expression.rb

Instance Method Summary collapse

Instance Method Details

#evaluate(expression, env) ⇒ Object 



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# File 'lib/cucumber/ci_environment/variable_expression.rb', line 6

def evaluate(expression, env)
  return nil if expression.nil?

  begin
    expression.gsub(/\${(.*?)(?:(?<!\\)\/(.*)\/(.*))?}/) do
      variable = Regexp.last_match(1)
      pattern = Regexp.last_match(2)
      replacement = Regexp.last_match(3)

      value = get_value(variable, env)
      raise "Undefined variable #{variable}" if value.nil?

      if pattern.nil?
        value
      else
        regexp = Regexp.new(pattern.gsub('\/', '/'))
        match = value.match(regexp)
        raise "No match for variable #{variable}" if match.nil?

        match[1..].each_with_index do |group, i|
          replacement = replacement.gsub("\\#{i + 1}", group)
        end
        replacement
      end
    end
  rescue StandardError
    nil
  end
end

#get_value(variable, env) ⇒ Object 



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# File 'lib/cucumber/ci_environment/variable_expression.rb', line 36

def get_value(variable, env)
  if variable.index('*')
    env.each do |name, value|
      return value if Regexp.new(variable.gsub('*', '.*')).match?(name)
    end
  end
  env[variable]
end