module RuboCop::YAMLDuplicationChecker
Find duplicated keys from YAML.
Public Class Methods
check(yaml_string, filename, &on_duplicated)
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# File lib/rubocop/yaml_duplication_checker.rb, line 6 def self.check(yaml_string, filename, &on_duplicated) # Ruby 2.6+ tree = if Gem::Version.new(Psych::VERSION) >= Gem::Version.new('3.1.0') # Specify filename to display helpful message when it raises # an error. YAML.parse(yaml_string, filename: filename) else YAML.parse(yaml_string, filename) end return unless tree traverse(tree, &on_duplicated) end
Private Class Methods
traverse(tree, &on_duplicated)
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# File lib/rubocop/yaml_duplication_checker.rb, line 20 def self.traverse(tree, &on_duplicated) case tree when Psych::Nodes::Mapping tree.children.each_slice(2).with_object([]) do |(key, value), keys| exist = keys.find { |key2| key2.value == key.value } on_duplicated.call(exist, key) if exist keys << key traverse(value, &on_duplicated) end else children = tree.children return unless children children.each { |c| traverse(c, &on_duplicated) } end end