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# File 'lib/bundler/ruby_dsl.rb', line 4
def ruby(*ruby_version)
options = ruby_version.last.is_a?(Hash) ? ruby_version.pop : {}
ruby_version.flatten!
raise GemfileError, "Please define :engine_version" if options[:engine] && options[:engine_version].nil?
raise GemfileError, "Please define :engine" if options[:engine_version] && options[:engine].nil?
if options[:engine] == "ruby" && options[:engine_version] &&
ruby_version != Array(options[:engine_version])
raise GemfileEvalError, "ruby_version must match the :engine_version for MRI"
end
@ruby_version = RubyVersion.new(ruby_version, options[:patchlevel], options[:engine], options[:engine_version])
end
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