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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Naming
# This cop checks that your heredocs are using meaningful delimiters.
# By default it disallows `END` and `EO*`, and can be configured through
# blacklisting additional delimiters.
#
# @example
#
# # good
# <<-SQL
# SELECT * FROM foo
# SQL
#
# # bad
# <<-END
# SELECT * FROM foo
# END
#
# # bad
# <<-EOS
# SELECT * FROM foo
# EOS
class HeredocDelimiterNaming < Cop
include Heredoc
MSG = 'Use meaningful heredoc delimiters.'.freeze
def on_heredoc(node)
return if meaningful_delimiters?(node)
add_offense(node, location: :heredoc_end)
end
private
def meaningful_delimiters?(node)
delimiters = delimiter_string(node)
return false unless delimiters =~ /\w/
blacklisted_delimiters.none? do |blacklisted_delimiter|
delimiters =~ Regexp.new(blacklisted_delimiter)
end
end
def blacklisted_delimiters
cop_config['Blacklist'] || []
end
end
end
end
end
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