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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for quotes and commas in %w, e.g. `%w('foo', "bar")`
#
# It is more likely that the additional characters are unintended (for
# example, mistranslating an array of literals to percent string notation)
# rather than meant to be part of the resulting strings.
#
# @example
#
# # bad
#
# %w('foo', "bar")
#
# @example
#
# # good
#
# %w(foo bar)
class PercentStringArray < Cop
include PercentLiteral
QUOTES_AND_COMMAS = [/,$/, /^'.*'$/, /^".*"$/].freeze
LEADING_QUOTE = /^['"]/.freeze
TRAILING_QUOTE = /['"]?,?$/.freeze
MSG = "Within `%w`/`%W`, quotes and ',' are unnecessary and may be " \
'unwanted in the resulting strings.'.freeze
def on_array(node)
process(node, '%w', '%W')
end
def on_percent_literal(node)
return unless contains_quotes_or_commas?(node)
add_offense(node)
end
def autocorrect(node)
lambda do |corrector|
node.values.each do |value|
range = value.loc.expression
match = range.source.match(TRAILING_QUOTE)
corrector.remove_trailing(range, match[0].length) if match
if range.source =~ LEADING_QUOTE
corrector.remove_leading(range, 1)
end
end
end
end
private
def contains_quotes_or_commas?(node)
node.values.any? do |value|
literal = value.children.first.to_s.scrub
# To avoid likely false positives (e.g. a single ' or ")
next if literal.gsub(/[^[[:alnum:]]]/, '').empty?
QUOTES_AND_COMMAS.any? { |pat| literal =~ pat }
end
end
end
end
end
end
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