Using Brakeman::AliasProcessor

gistfile1.rb

require 'ruby_parser'
require 'ruby2ruby'
require 'brakeman'
require 'brakeman/processors/alias_processor'

#Local variables for clarity
def process code
  sexp = RubyParser.new.parse code
  processed_sexp = Brakeman::AliasProcessor.new.process_safely sexp
  pretty_code = Ruby2Ruby.new.process processed_sexp
end

puts process <<RUBY

x = [1, 2, 3]

y = 1

y = y + 1

x[y]

RUBY

=begin output
x = [1, 2, 3]
y = 1
y = 2
3
=end