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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# Checks for unnecessary `require` statement.
#
# The following features are unnecessary `require` statement because
# they are already loaded.
#
# ruby -ve 'p $LOADED_FEATURES.reject { |feature| %r|/| =~ feature }'
# ruby 2.2.8p477 (2017-09-14 revision 59906) [x86_64-darwin13]
# ["enumerator.so", "rational.so", "complex.so", "thread.rb"]
#
# This cop targets Ruby 2.2 or higher containing these 4 features.
#
# @example
# # bad
# require 'unloaded_feature'
# require 'thread'
#
# # good
# require 'unloaded_feature'
class RedundantRequireStatement < Base
include RangeHelp
extend AutoCorrector
extend TargetRubyVersion
minimum_target_ruby_version 2.2
MSG = 'Remove unnecessary `require` statement.'
RESTRICT_ON_SEND = %i[require].freeze
# @!method unnecessary_require_statement?(node)
def_node_matcher :unnecessary_require_statement?, <<~PATTERN
(send nil? :require
(str {"enumerator" "rational" "complex" "thread"}))
PATTERN
def on_send(node)
return unless unnecessary_require_statement?(node)
add_offense(node) do |corrector|
range = range_with_surrounding_space(node.loc.expression, side: :right)
corrector.remove(range)
end
end
end
end
end
end
Version data entries
19 entries across 15 versions & 3 rubygems