Enable more typing

Library/Homebrew/build.rb

@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 # This script is loaded by formula_installer as a separate instance.
@@ -235,12 +235,12 @@ rescue Exception => e # rubocop:disable Lint/RescueException
   # BuildErrors are specific to build processes and not other
   # children, which is why we create the necessary state here
   # and not in Utils.safe_fork.
-  case error_hash["json_class"]
+  case e
-  when "BuildError"
+  when BuildError
     error_hash["cmd"] = e.cmd
     error_hash["args"] = e.args
     error_hash["env"] = e.env
-  when "ErrorDuringExecution"
+  when ErrorDuringExecution
     error_hash["cmd"] = e.cmd
     error_hash["status"] = if e.status.is_a?(Process::Status)
       {

Library/Homebrew/cask/cask.rb

@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cask/cask_loader"
@@ -83,6 +83,19 @@ module Cask
       @tap
     end
 
+    sig {
+      params(
+        token:              String,
+        sourcefile_path:    T.nilable(Pathname),
+        source:             T.nilable(String),
+        tap:                T.nilable(Tap),
+        loaded_from_api:    T::Boolean,
+        config:             T.nilable(Config),
+        allow_reassignment: T::Boolean,
+        loader:             T.nilable(CaskLoader::ILoader),
+        block:              T.nilable(T.proc.bind(DSL).void),
+      ).void
+    }
     def initialize(token, sourcefile_path: nil, source: nil, tap: nil, loaded_from_api: false,
                    config: nil, allow_reassignment: false, loader: nil, &block)
       @token = token
@@ -92,7 +105,8 @@ module Cask
       @allow_reassignment = allow_reassignment
       @loaded_from_api = loaded_from_api
       @loader = loader
-      @block = block
+      # https://github.com/sorbet/sorbet/issues/6843
+      instance_variable_set(:@block, block)
 
       @default_config = config || Config.new
 
@@ -123,9 +137,10 @@ module Cask
 
     sig { returns(T::Array[[String, String]]) }
     def timestamped_versions
-      Pathname.glob(metadata_timestamped_path(version: "*", timestamp: "*"))
+      relative_paths = Pathname.glob(metadata_timestamped_path(version: "*", timestamp: "*"))
                                .map { |p| p.relative_path_from(p.parent.parent) }
-              .sort_by(&:basename) # sort by timestamp
+      # https://github.com/sorbet/sorbet/issues/6844
+      T.unsafe(relative_paths).sort_by(&:basename) # sort by timestamp
        .map { |p| p.split.map(&:to_s) }
     end
 
@@ -150,7 +165,7 @@ module Cask
 
         version_os_hash
       ensure
-        MacOS.full_version = actual_version
+        MacOS.full_version = actual_version || MacOS.full_version.to_s
       end
     end
 

Library/Homebrew/cask/cask_loader.rb

@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cask/cache"
@@ -12,8 +12,18 @@ module Cask
   module CaskLoader
     extend Context
 
+    module ILoader
+      extend T::Sig
+      extend T::Helpers
+      interface!
+
+      sig { abstract.params(config: Config).returns(Cask) }
+      def load(config:); end
+    end
+
     # Loads a cask from a string.
     class FromContentLoader
+      include ILoader
       attr_reader :content, :tap
 
       def self.can_load?(ref)
@@ -112,7 +122,6 @@ module Cask
         return false unless ref.to_s.match?(@uri_regex)
 
         uri = URI(ref)
-        return false unless uri
         return false unless uri.path
 
         true
@@ -123,7 +132,7 @@ module Cask
       sig { params(url: T.any(URI::Generic, String)).void }
       def initialize(url)
         @url = URI(url)
-        super Cache.path/File.basename(@url.path)
+        super Cache.path/File.basename(T.must(@url.path))
       end
 
       def load(config:)
@@ -185,6 +194,7 @@ module Cask
 
     # Loads a cask from an existing {Cask} instance.
     class FromInstanceLoader
+      include ILoader
       def self.can_load?(ref)
         ref.is_a?(Cask)
       end
@@ -200,6 +210,7 @@ module Cask
 
     # Loads a cask from the JSON API.
     class FromAPILoader
+      include ILoader
       attr_reader :token, :path
 
       def self.can_load?(ref)

Library/Homebrew/cask/dsl.rb

@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "locale"
@@ -196,7 +196,7 @@ module Cask
 
     # @api public
     def url(*args, **options, &block)
-      caller_location = caller_locations[0]
+      caller_location = T.must(caller_locations).fetch(0)
 
       set_unique_stanza(:url, args.empty? && options.empty? && !block) do
         if block
@@ -237,14 +237,14 @@ module Cask
       set_unique_stanza(:sha256, should_return) do
         @on_system_blocks_exist = true if arm.present? || intel.present?
 
-        arg ||= on_arch_conditional(arm: arm, intel: intel)
+        val = arg || on_arch_conditional(arm: arm, intel: intel)
-        case arg
+        case val
         when :no_check
-          arg
+          val
         when String
-          Checksum.new(arg)
+          Checksum.new(val)
         else
-          raise CaskInvalidError.new(cask, "invalid 'sha256' value: #{arg.inspect}")
+          raise CaskInvalidError.new(cask, "invalid 'sha256' value: #{val.inspect}")
         end
       end
     end

Library/Homebrew/cask/dsl/base.rb

@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "cask/utils"
@@ -26,7 +26,7 @@ module Cask
       # rubocop:disable Style/MissingRespondToMissing
       def method_missing(method, *)
         if method
-          underscored_class = self.class.name.gsub(/([[:lower:]])([[:upper:]][[:lower:]])/, '\1_\2').downcase
+          underscored_class = T.must(self.class.name).gsub(/([[:lower:]])([[:upper:]][[:lower:]])/, '\1_\2').downcase
           section = underscored_class.split("::").last
           Utils.method_missing_message(method, @cask.to_s, section)
           nil

Library/Homebrew/extend/on_system.rbi

@@ -0,0 +1,6 @@
+# typed: strict
+
+module OnSystem::MacOSOnly
+  sig { params(arm: T.nilable(String), intel: T.nilable(String)).returns(T.nilable(String)) }
+  def on_arch_conditional(arm: nil, intel: nil); end
+end

Library/Homebrew/os/linux.rb

@@ -82,7 +82,7 @@ module OS
       nil
     end
 
-    def sdk_path
+    def sdk_path(_version = nil)
       nil
     end
 

Library/Homebrew/os/mac.rb

@@ -1,4 +1,4 @@
-# typed: false
+# typed: true
 # frozen_string_literal: true
 
 require "os/mac/version"
@@ -38,7 +38,7 @@ module OS
       end
     end
 
-    sig { params(version: Version).void }
+    sig { params(version: String).void }
     def full_version=(version)
       @full_version = Version.new(version.chomp)
       @version = nil