Merge pull request #19681 from Homebrew/parser-optimizations

perf: rubocop/tapioca parser optimizations

Library/.rubocop.yml

@@ -18,12 +18,17 @@ inherit_mode:
     - Exclude
 
 AllCops:
+  # TODO: This is the default parser in Ruby >= 3.4
+  # https://github.com/rubocop/rubocop-ast/blob/6b9136235219e9448ee4f369e17cf69bcd9db621/lib/rubocop/ast/processed_source.rb#L385
+  ParserEngine: parser_prism
   TargetRubyVersion: 3.3
   NewCops: enable
   Include:
     - "**/*.rbi"
   Exclude:
     - "Homebrew/sorbet/rbi/{dsl,gems}/**/*.rbi"
+    # TODO: remove file and exclusion in Ruby 3.4
+    - "Homebrew/sorbet/rbi/parser*.rbi"
     - "Homebrew/bin/*"
     - "Homebrew/vendor/**/*"
     - "Taps/*/*/vendor/**/*"

Library/Homebrew/sorbet/tapioca/config.yml

@@ -37,4 +37,9 @@ gem:
     # The tapioca generated gem is not correct or sufficient for pycall
     # so we need to generate our own:
     - pycall
+    # Skipping rbi generation for parser results in a 7x performance
+    # improvement in `brew typecheck --update--all`, so we just persist it
+    # instead. (This gem is only needed by rubocop, which is in the process of
+    # migrating to prism.)
+    - parser
   prerequire: sorbet/tapioca/prerequire.rb