Portable Ruby 4.0.1

Co-authored-by: Bo Anderson <mail@boanderson.me>

Author: p-linnane

.gitignore

@@ -40,7 +40,7 @@
 # Ignore Ruby gems for versions other than we explicitly vendor.
 # Keep this in sync with the list in standalone/init.rb.
 **/vendor/bundle/ruby/*/
-!**/vendor/bundle/ruby/3.4.0/
+!**/vendor/bundle/ruby/4.0.0/
 
 # Ignore Bundler binary files
 **/vendor/bundle/ruby/*/gems/**/*.bundle

Library/.rubocop.yml

@@ -20,6 +20,8 @@ inherit_mode:
     - Exclude
 
 AllCops:
+  # Only bump this after the first tagged brew release with a new Ruby version,
+  # otherwise taps will be prompted to use newer Ruby syntax too early.
   TargetRubyVersion: 3.4
   NewCops: enable
   Include:

Library/Homebrew/.ruby-version

@@ -1 +1 @@
-3.4.8
+4.0.1

Library/Homebrew/Gemfile

@@ -5,9 +5,9 @@ source "https://rubygems.org"
 # The default case (no envs), should always be a restrictive bound on the lowest supported minor version.
 # This is the branch that Dependabot will use.
 if ENV.fetch("HOMEBREW_USE_RUBY_FROM_PATH", "").empty?
-  ruby "~> 3.4.0"
+  ruby "~> 4.0.0"
 else
-  ruby ">= 3.4.0"
+  ruby ">= 4.0.0"
 end
 
 # disallowed gems (should not be used)

Library/Homebrew/Gemfile.lock

@@ -228,7 +228,7 @@ DEPENDENCIES
   yard-sorbet
 
 RUBY VERSION
-   ruby 3.4.8p72
+  ruby 4.0.1
 
 BUNDLED WITH
-   2.6.9
+  4.0.3

Library/Homebrew/bundle/dumper.rb

@@ -2,7 +2,6 @@
 # frozen_string_literal: true
 
 require "fileutils"
-require "pathname"
 
 module Homebrew
   module Bundle

Library/Homebrew/extend/os/mac/linkage_checker.rb

@@ -11,6 +11,22 @@ def system_libraries_exist_in_cache?
         # In macOS Big Sur and later, system libraries do not exist on-disk and instead exist in a cache.
         MacOS.version >= :big_sur
       end
+
+      sig { params(dylib: String).returns(T::Boolean) }
+      def dylib_found_in_shared_cache?(dylib)
+        Kernel.require "fiddle"
+        @dyld_shared_cache_contains_path ||= T.let(begin
+          libc = Fiddle.dlopen("/usr/lib/libSystem.B.dylib")
+
+          Fiddle::Function.new(
+            libc["_dyld_shared_cache_contains_path"],
+            [Fiddle::TYPE_CONST_STRING],
+            Fiddle::TYPE_BOOL,
+          )
+        end, T.nilable(Fiddle::Function))
+
+        @dyld_shared_cache_contains_path.call(dylib)
+      end
     end
   end
 end

Library/Homebrew/linkage_checker.rb

@@ -232,20 +232,9 @@ def system_libraries_exist_in_cache?
     false
   end
 
-  sig { params(dylib: String).returns(T::Boolean) }
-  def dylib_found_in_shared_cache?(dylib)
-    require "fiddle"
-    @dyld_shared_cache_contains_path ||= T.let(begin
-      libc = Fiddle.dlopen("/usr/lib/libSystem.B.dylib")
-
-      Fiddle::Function.new(
-        libc["_dyld_shared_cache_contains_path"],
-        [Fiddle::TYPE_CONST_STRING],
-        Fiddle::TYPE_BOOL,
-      )
-    end, T.nilable(Fiddle::Function))
-
-    @dyld_shared_cache_contains_path.call(dylib)
+  sig { params(_dylib: String).returns(T::Boolean) }
+  def dylib_found_in_shared_cache?(_dylib)
+    false
   end
 
   sig {

Library/Homebrew/sorbet/tapioca/require.rb

@@ -23,6 +23,9 @@
   next if name == "sorbet-static"
   next if name == "sorbet-static-and-runtime"
 
+  # We don't generate RBIs for pycall
+  next if name == "pycall"
+
   name = dependency_require_map[name] if dependency_require_map.key?(name)
   require name
   additional_requires_map[name]&.each { require(it) }

Library/Homebrew/standalone/init.rb

@@ -20,7 +20,7 @@
   end
 
   # This list should match .gitignore
-  vendored_versions = ["3.4"].freeze
+  vendored_versions = ["4.0"].freeze
   vendored_versions.include?("#{ruby_major}.#{ruby_minor}")
 end.freeze