# encoding: utf-8 require 'uri' module RuboCop module Cop module Metrics # This cop checks the length of lines in the source code. # The maximum length is configurable. class LineLength < Cop include ConfigurableMax MSG = 'Line is too long. [%d/%d]' def investigate(processed_source) processed_source.lines.each_with_index do |line, index| next unless line.length > max if allow_uri? uri_range = find_excessive_uri_range(line) next if uri_range && allowed_uri_position?(line, uri_range) end message = format(MSG, line.length, max) excessive_position = if uri_range && uri_range.begin < max uri_range.end else max end range = source_range(processed_source.buffer, index + 1, excessive_position...(line.length)) add_offense(nil, range, message) { self.max = line.length } end end def max cop_config['Max'] end def allow_uri? cop_config['AllowURI'] end def allowed_uri_position?(line, uri_range) uri_range.begin < max && uri_range.end == line.length end def find_excessive_uri_range(line) last_uri_match = match_uris(line).last return nil unless last_uri_match begin_position, end_position = last_uri_match.offset(0) return nil if begin_position < max && end_position < max begin_position...end_position end def match_uris(string) matches = [] unscanned_position = 0 loop do match_data = string.match(uri_regexp, unscanned_position) break unless match_data uri_ish_string = match_data[0] matches << match_data if valid_uri?(uri_ish_string) _, unscanned_position = match_data.offset(0) end matches end def valid_uri?(uri_ish_string) URI.parse(uri_ish_string) true rescue false end def uri_regexp URI.regexp(cop_config['URISchemes']) end end end end end