Sha256: 107a14096fff2a5f55f9c300f10078dae1aee2bbcae29553dd25b2aea9294cf4
Contents?: true
Size: 1.4 KB
Versions: 5
Compression:
Stored size: 1.4 KB
Contents
# encoding: utf-8
module Rubocop
module Cop
module Style
# This cop checks that the cyclomatic complexity of methods is not higher
# than the configured maximum. The cyclomatic complexity is the number of
# linearly independent paths through a method. The algorithm counts
# decision points and adds one.
#
# An if statement (or unless or ?:) increases the complexity by one. An
# else branch does not, since it doesn't add a decision point. The &&
# operator (or keyword and) can be converted to a nested if statement,
# and ||/or is shorthand for a sequence of ifs, so they also add one.
# Loops can be said to have an exit condition, so they add one.
class CyclomaticComplexity < Cop
include CheckMethods
include ConfigurableMax
MSG = 'Cyclomatic complexity for %s is too high. [%d/%d]'
DECISION_POINT_NODES = [:if, :while, :until, :for, :rescue, :when,
:and, :or]
private
def check(node, method_name, *_)
complexity = 1
on_node(DECISION_POINT_NODES, node) { complexity += 1 }
max = cop_config['Max']
if complexity > max
add_offense(node, :keyword,
format(MSG, method_name, complexity, max)) do
self.max = complexity
end
end
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems