Require rubocop-ast gem

Gemfile

@@ -22,5 +22,8 @@ group :test do
   gem 'webmock', require: false
 end
 
+local_ast = File.expand_path('../rubocop-ast', __dir__)
+gem 'rubocop-ast', path: local_ast if Dir.exist? local_ast
+
 local_gemfile = File.expand_path('Gemfile.local', __dir__)
 eval_gemfile local_gemfile if File.exist?(local_gemfile)

lib/rubocop.rb

@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
-require 'parser'
 require 'rainbow'
 
 require 'English'
 require 'set'
-require 'forwardable'
 require 'unicode/display_width/no_string_ext'
+require 'rubocop-ast'
 
 require_relative 'rubocop/version'
 
@@ -15,60 +14,7 @@
 require_relative 'rubocop/file_finder'
 require_relative 'rubocop/platform'
 require_relative 'rubocop/name_similarity'
-require_relative 'rubocop/node_pattern'
 require_relative 'rubocop/string_interpreter'
-require_relative 'rubocop/ast/sexp'
-require_relative 'rubocop/ast/node'
-require_relative 'rubocop/ast/node/mixin/method_identifier_predicates'
-require_relative 'rubocop/ast/node/mixin/binary_operator_node'
-require_relative 'rubocop/ast/node/mixin/collection_node'
-require_relative 'rubocop/ast/node/mixin/conditional_node'
-require_relative 'rubocop/ast/node/mixin/hash_element_node'
-require_relative 'rubocop/ast/node/mixin/method_dispatch_node'
-require_relative 'rubocop/ast/node/mixin/modifier_node'
-require_relative 'rubocop/ast/node/mixin/numeric_node'
-require_relative 'rubocop/ast/node/mixin/parameterized_node'
-require_relative 'rubocop/ast/node/mixin/predicate_operator_node'
-require_relative 'rubocop/ast/node/mixin/basic_literal_node'
-require_relative 'rubocop/ast/node/alias_node'
-require_relative 'rubocop/ast/node/and_node'
-require_relative 'rubocop/ast/node/args_node'
-require_relative 'rubocop/ast/node/array_node'
-require_relative 'rubocop/ast/node/block_node'
-require_relative 'rubocop/ast/node/break_node'
-require_relative 'rubocop/ast/node/case_match_node'
-require_relative 'rubocop/ast/node/case_node'
-require_relative 'rubocop/ast/node/class_node'
-require_relative 'rubocop/ast/node/def_node'
-require_relative 'rubocop/ast/node/defined_node'
-require_relative 'rubocop/ast/node/ensure_node'
-require_relative 'rubocop/ast/node/for_node'
-require_relative 'rubocop/ast/node/forward_args_node'
-require_relative 'rubocop/ast/node/float_node'
-require_relative 'rubocop/ast/node/hash_node'
-require_relative 'rubocop/ast/node/if_node'
-require_relative 'rubocop/ast/node/int_node'
-require_relative 'rubocop/ast/node/keyword_splat_node'
-require_relative 'rubocop/ast/node/module_node'
-require_relative 'rubocop/ast/node/or_node'
-require_relative 'rubocop/ast/node/pair_node'
-require_relative 'rubocop/ast/node/range_node'
-require_relative 'rubocop/ast/node/regexp_node'
-require_relative 'rubocop/ast/node/resbody_node'
-require_relative 'rubocop/ast/node/retry_node'
-require_relative 'rubocop/ast/node/return_node'
-require_relative 'rubocop/ast/node/self_class_node'
-require_relative 'rubocop/ast/node/send_node'
-require_relative 'rubocop/ast/node/str_node'
-require_relative 'rubocop/ast/node/super_node'
-require_relative 'rubocop/ast/node/symbol_node'
-require_relative 'rubocop/ast/node/until_node'
-require_relative 'rubocop/ast/node/when_node'
-require_relative 'rubocop/ast/node/while_node'
-require_relative 'rubocop/ast/node/yield_node'
-require_relative 'rubocop/ast/builder'
-require_relative 'rubocop/ast/traversal'
-require_relative 'rubocop/error'
 require_relative 'rubocop/warning'
 
 require_relative 'rubocop/cop/util'
@@ -612,10 +558,8 @@
 require_relative 'rubocop/config_store'
 require_relative 'rubocop/config_validator'
 require_relative 'rubocop/target_finder'
-require_relative 'rubocop/token'
 require_relative 'rubocop/comment_config'
 require_relative 'rubocop/magic_comment'
-require_relative 'rubocop/processed_source'
 require_relative 'rubocop/result_cache'
 require_relative 'rubocop/runner'
 require_relative 'rubocop/cli'