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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks for places where the `#__dir__` method can replace more
# complex constructs to retrieve a canonicalized absolute path to the
# current file.
#
# @example
# # bad
# path = File.expand_path(File.dirname(__FILE__))
#
# # bad
# path = File.dirname(File.realpath(__FILE__))
#
# # good
# path = __dir__
class Dir < Base
extend AutoCorrector
MSG = "Use `__dir__` to get an absolute path to the current file's directory."
RESTRICT_ON_SEND = %i[expand_path dirname].freeze
def_node_matcher :dir_replacement?, <<~PATTERN
{(send (const {nil? cbase} :File) :expand_path (send (const {nil? cbase} :File) :dirname #file_keyword?))
(send (const {nil? cbase} :File) :dirname (send (const {nil? cbase} :File) :realpath #file_keyword?))}
PATTERN
def on_send(node)
dir_replacement?(node) do
add_offense(node) do |corrector|
corrector.replace(node, '__dir__')
end
end
end
private
def file_keyword?(node)
node.str_type? && node.source_range.is?('__FILE__')
end
end
end
end
end
Version data entries
30 entries across 30 versions & 2 rubygems