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Contents
# frozen_string_literal: true
module RuboCop
module Cop
# @api private
#
# This module handles measurement and reporting of complexity in methods.
module MethodComplexity
include IgnoredMethods
include Metrics::Utils::RepeatedCsendDiscount
extend NodePattern::Macros
extend ExcludeLimit
exclude_limit 'Max'
# Ensure cops that include `MethodComplexity` have the config
# `attr_accessor`s that `ignored_method?` needs.
def self.included(base)
base.extend(IgnoredMethods::Config)
end
def on_def(node)
return if ignored_method?(node.method_name)
check_complexity(node, node.method_name)
end
alias on_defs on_def
def on_block(node)
define_method?(node) do |name|
return if ignored_method?(name)
check_complexity(node, name)
end
end
private
# @!method define_method?(node)
def_node_matcher :define_method?, <<~PATTERN
(block
(send nil? :define_method ({sym str} $_))
args
_)
PATTERN
def check_complexity(node, method_name)
# Accepts empty methods always.
return unless node.body
max = cop_config['Max']
reset_repeated_csend
complexity, abc_vector = complexity(node.body)
return unless complexity > max
msg = format(self.class::MSG,
method: method_name,
complexity: complexity,
abc_vector: abc_vector,
max: max)
add_offense(node, message: msg) { self.max = complexity.ceil }
end
def complexity(body)
body.each_node(:lvasgn, *self.class::COUNTED_NODES).reduce(1) do |score, node|
if node.lvasgn_type?
reset_on_lvasgn(node)
next score
end
score + complexity_score_for(node)
end
end
end
end
end
Version data entries
46 entries across 44 versions & 6 rubygems