Module: Detective

Defined in:
lib/detective.rb

Class Method Summary collapse

Class Method Details

.get_location(ruby_statement) ⇒ Object

Finds the location of a method in ruby source files You can pass a string like

  • ‘Class.name’ class method

# ‘String#size’ instance method



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# File 'lib/detective.rb', line 55

def self.get_location(ruby_statement)
  if ruby_statement.index('#')
    # instance method
    class_name, method_name = ruby_statement.split('#')
    class_method = false
  elsif ruby_statement.index('.')
    class_name, method_name = ruby_statement.split('.')
    class_method = true
  else
    raise "Invalid parameter"
  end
  the_klass = eval(class_name)
  ForkSupported ? get_location_fork(the_klass, method_name, class_method) : get_location_thread(the_klass, method_name, class_method)
end

.view_source(method, format = :plain) ⇒ Object 



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# File 'lib/detective.rb', line 12

def self.view_source(method, format=:plain)
   location = get_location(method).strip.split /[\r\n]+/
   case location.first
     when 'native method' then return 'native method'
     when 'error' then raise location[1..-1].join(' ')
     when 'location' then
     begin
       filename, line_no = location[1,2] 
       line_no = line_no.to_i
       f = File.open filename
       source = ""
       output = case format
         when :plain then ""
         when :rdoc then "#{filename}, line #{line_no}" << "\r\n"
         else ""
       end
       current_line_no = 0
       rp = RubyParser.new
       f.each_line do |current_line|
         current_line_no += 1
         if current_line_no >= line_no
           output << case format
             when :plain then current_line
             when :rdoc then "#{current_line_no}:#{current_line}"
             else current_line
           end
           source << current_line
           # Try to parse it to know whether the method is complete or not
           rp.parse(source) && break rescue nil
         end
       end
       f.close
       return output
     rescue Exception => e
       return "Cannot find source code"
     end
   end
end