1.rb

load File.expand_path('2.rb') # decomposed in 2.3

2.rb

require_relative '3'

3.rb

def inspect_caller_location
  puts caller_locations.first.absolute_path
  p caller_locations.first.absolute_path.bytes
end

inspect_caller_location # prints a decomposed variant or the full path to 3.rb

require_relative '4'

4.rb

load Dir.pwd + '/5.rb' # composed

5.rb

require_relative '6'

6.rb

inspect_caller_location # prints a composed variant or the full path to 6.rb