lib/brakeman/tracker/method_info.rb
require 'brakeman/util'
module Brakeman
class MethodInfo
include Brakeman::Util
attr_reader :name, :src, :owner, :file, :type
def initialize name, src, owner, file
@name = name
@src = src
@owner = owner
@file = file
@type = case src.node_type
when :defn
:instance
when :defs
:class
else
raise "Expected sexp type: #{src.node_type}"
end
@simple_method = nil
end
# To support legacy code that expected a Hash
def [] attr
self.send(attr)
end
def very_simple_method?
return @simple_method == :very unless @simple_method.nil?
# Very simple methods have one (simple) expression in the body and
# no arguments
if src.formal_args.length == 1 # no args
if src.method_length == 1 # Single expression in body
value = first_body # First expression in body
if simple_literal? value or
(array? value and all_literals? value) or
(hash? value and all_literals? value, :hash)
@return_value = value
@simple_method = :very
end
end
end
@simple_method ||= false
end
def return_value env = nil
if very_simple_method?
return @return_value
else
nil
end
end
def first_body
case @type
when :class
src[4]
when :instance
src[3]
end
end
end
end