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Contents
# frozen_string_literal: true
module RuboCop
# Find duplicated keys from YAML.
module YAMLDuplicationChecker
def self.check(yaml_string, filename, &on_duplicated)
# Specify filename to display helpful message when it raises an error.
tree = YAML.parse(yaml_string, filename: filename)
return unless tree
traverse(tree, &on_duplicated)
end
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
private_class_method :traverse
end
end
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6,806 entries across 6,802 versions & 24 rubygems