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# frozen_string_literal: true module RuboCop module Cop module Metrics # This cop checks for excessive nesting of conditional and looping # constructs. # # You can configure if blocks are considered using the `CountBlocks` # option. When set to `false` (the default) blocks are not counted # towards the nesting level. Set to `true` to count blocks as well. # # The maximum level of nesting allowed is configurable. class BlockNesting < Base NESTING_BLOCKS = %i[ case if while while_post until until_post for resbody ].freeze exclude_limit 'Max' def on_new_investigation return if processed_source.blank? max = cop_config['Max'] check_nesting_level(processed_source.ast, max, 0) end private def check_nesting_level(node, max, current_level) if consider_node?(node) current_level += 1 unless node.if_type? && node.elsif? if current_level > max self.max = current_level unless part_of_ignored_node?(node) add_offense(node, message: message(max)) do ignore_node(node) end end end end node.each_child_node do |child_node| check_nesting_level(child_node, max, current_level) end end def consider_node?(node) return true if NESTING_BLOCKS.include?(node.type) count_blocks? && node.block_type? end def message(max) "Avoid more than #{max} levels of block nesting." end def count_blocks? cop_config['CountBlocks'] end end end end end
Version data entries
5 entries across 5 versions & 1 rubygems