tap: add style_exceptions configuration

Library/Homebrew/rubocops/extend/formula.rb

@@ -35,6 +35,7 @@ module RuboCop
 
         class_node, parent_class_node, @body = *node
         @formula_name = Pathname.new(@file_path).basename(".rb").to_s
+        @tap_style_exceptions = nil
         audit_formula(node, class_node, parent_class_node, @body)
       end
 
@@ -472,6 +473,31 @@ module RuboCop
         match_obj[1]
       end
 
+      # Returns whether the current formula exists in the given style exception list
+      def tap_style_exception?(list)
+        if @tap_style_exceptions.blank? && formula_tap.present?
+          @tap_style_exceptions = {}
+
+          style_exceptions_dir = "#{File.dirname(File.dirname(@file_path))}/style_exceptions/*.json"
+          Pathname.glob(style_exceptions_dir).each do |exception_file|
+            list_name = exception_file.basename.to_s.chomp(".json").to_sym
+            list_contents = begin
+              JSON.parse exception_file.read
+            rescue JSON::ParserError
+              nil
+            end
+            next if list_contents.blank?
+
+            @tap_style_exceptions[list_name] = list_contents
+          end
+        end
+
+        return false if @tap_style_exceptions.blank?
+        return false unless @tap_style_exceptions.key? list
+
+        @tap_style_exceptions[list].include? @formula_name
+      end
+
       private
 
       def formula_class?(node)

Library/Homebrew/tap.rb

@@ -21,12 +21,14 @@ class Tap
   HOMEBREW_TAP_FORMULA_RENAMES_FILE = "formula_renames.json"
   HOMEBREW_TAP_MIGRATIONS_FILE = "tap_migrations.json"
   HOMEBREW_TAP_AUDIT_EXCEPTIONS_DIR = "audit_exceptions"
+  HOMEBREW_TAP_STYLE_EXCEPTIONS_DIR = "style_exceptions"
   HOMEBREW_TAP_PYPI_FORMULA_MAPPINGS = "pypi_formula_mappings.json"
 
   HOMEBREW_TAP_JSON_FILES = %W[
     #{HOMEBREW_TAP_FORMULA_RENAMES_FILE}
     #{HOMEBREW_TAP_MIGRATIONS_FILE}
     #{HOMEBREW_TAP_AUDIT_EXCEPTIONS_DIR}/*.json
+    #{HOMEBREW_TAP_STYLE_EXCEPTIONS_DIR}/*.json
     #{HOMEBREW_TAP_PYPI_FORMULA_MAPPINGS}
   ].freeze
 
@@ -114,6 +116,7 @@ class Tap
     @formula_renames = nil
     @tap_migrations = nil
     @audit_exceptions = nil
+    @style_exceptions = nil
     @pypi_formula_mappings = nil
     @config = nil
     remove_instance_variable(:@private) if instance_variable_defined?(:@private)
@@ -567,6 +570,12 @@ class Tap
     @audit_exceptions = read_formula_list_directory "#{HOMEBREW_TAP_AUDIT_EXCEPTIONS_DIR}/*"
   end
 
+  # Hash with style exceptions
+  sig { returns(Hash) }
+  def style_exceptions
+    @style_exceptions = read_formula_list_directory "#{HOMEBREW_TAP_STYLE_EXCEPTIONS_DIR}/*"
+  end
+
   # Hash with pypi formula mappings
   sig { returns(Hash) }
   def pypi_formula_mappings
@@ -760,6 +769,15 @@ class CoreTap < Tap
     end
   end
 
+  # @private
+  def style_exceptions
+    @style_exceptions ||= begin
+      self.class.ensure_installed!
+      super
+    end
+  end
+
+  # @private
   def pypi_formula_mappings
     @pypi_formula_mappings ||= begin
       self.class.ensure_installed!

Library/Homebrew/tap_auditor.rb

@@ -8,13 +8,14 @@ module Homebrew
   class TapAuditor
     extend T::Sig
 
-    attr_reader :name, :path, :tap_audit_exceptions, :tap_pypi_formula_mappings, :problems
+    attr_reader :name, :path, :tap_audit_exceptions, :tap_style_exceptions, :tap_pypi_formula_mappings, :problems
 
     sig { params(tap: Tap, strict: T.nilable(T::Boolean)).void }
     def initialize(tap, strict:)
       @name                      = tap.name
       @path                      = tap.path
       @tap_audit_exceptions      = tap.audit_exceptions
+      @tap_style_exceptions      = tap.style_exceptions
       @tap_pypi_formula_mappings = tap.pypi_formula_mappings
       @problems                  = []
     end
@@ -38,6 +39,7 @@ module Homebrew
     sig { void }
     def audit_tap_formula_lists
       check_formula_list_directory "audit_exceptions", @tap_audit_exceptions
+      check_formula_list_directory "style_exceptions", @tap_style_exceptions
       check_formula_list "pypi_formula_mappings", @tap_pypi_formula_mappings
     end