class CodeStatisticsCalculator #:nodoc: attr_reader :lines, :code_lines, :classes, :methods PATTERNS = { rb: { line_comment: /^\s*#/, begin_block_comment: /^=begin/, end_block_comment: /^=end/, class: /^\s*class\s+[_A-Z]/, method: /^\s*def\s+[_a-z]/, }, js: { line_comment: %r{^\s*//}, begin_block_comment: %r{^\s*/\*}, end_block_comment: %r{\*/}, method: /function(\s+[_a-zA-Z][\da-zA-Z]*)?\s*\(/, }, coffee: { line_comment: /^\s*#/, begin_block_comment: /^\s*###/, end_block_comment: /^\s*###/, class: /^\s*class\s+[_A-Z]/, method: /[-=]>/, } } def initialize(lines = 0, code_lines = 0, classes = 0, methods = 0) @lines = lines @code_lines = code_lines @classes = classes @methods = methods end def add(code_statistics_calculator) @lines += code_statistics_calculator.lines @code_lines += code_statistics_calculator.code_lines @classes += code_statistics_calculator.classes @methods += code_statistics_calculator.methods end def add_by_file_path(file_path) File.open(file_path) do |f| self.add_by_io(f, file_type(file_path)) end end def add_by_io(io, file_type) patterns = PATTERNS[file_type] || {} comment_started = false while line = io.gets @lines += 1 if comment_started if patterns[:end_block_comment] && line =~ patterns[:end_block_comment] comment_started = false end next else if patterns[:begin_block_comment] && line =~ patterns[:begin_block_comment] comment_started = true next end end @classes += 1 if patterns[:class] && line =~ patterns[:class] @methods += 1 if patterns[:method] && line =~ patterns[:method] if line !~ /^\s*$/ && (patterns[:line_comment].nil? || line !~ patterns[:line_comment]) @code_lines += 1 end end end private def file_type(file_path) File.extname(file_path).sub(/\A\./, '').downcase.to_sym end end