Define MacOS::Version::SYMBOLS on macOS and linux

Library/Homebrew/os.rb

@@ -1,6 +1,8 @@
 # typed: true
 # frozen_string_literal: true
 
+require "version"
+
 # Helper functions for querying operating system information.
 #
 # @api private
@@ -48,6 +50,25 @@ module OS
   CI_GLIBC_VERSION = "2.23"
   CI_OS_VERSION = "Ubuntu 16.04"
 
+  module Mac
+    ::MacOS = OS::Mac
+
+    class Version < ::Version
+      # TODO: when removing symbols here, ensure that they are added to
+      # DEPRECATED_MACOS_VERSIONS in MacOSRequirement.
+      SYMBOLS = {
+        ventura:     "13",
+        monterey:    "12",
+        big_sur:     "11",
+        catalina:    "10.15",
+        mojave:      "10.14",
+        high_sierra: "10.13",
+        sierra:      "10.12",
+        el_capitan:  "10.11",
+      }.freeze
+    end
+  end
+
   if OS.mac?
     require "os/mac"
     # Don't tell people to report issues on unsupported configurations.

Library/Homebrew/os/linux.rb

@@ -31,12 +31,6 @@ module OS
   module Mac
     module_function
 
-    # rubocop:disable Naming/ConstantName
-    # rubocop:disable Style/MutableConstant
-    ::MacOS = OS::Mac
-    # rubocop:enable Naming/ConstantName
-    # rubocop:enable Style/MutableConstant
-
     raise "Loaded OS::Linux on generic OS!" if ENV["HOMEBREW_TEST_GENERIC_OS"]
 
     def version

Library/Homebrew/os/mac.rb

@@ -13,12 +13,6 @@ module OS
 
     module_function
 
-    # rubocop:disable Naming/ConstantName
-    # rubocop:disable Style/MutableConstant
-    ::MacOS = OS::Mac
-    # rubocop:enable Naming/ConstantName
-    # rubocop:enable Style/MutableConstant
-
     raise "Loaded OS::Mac on generic OS!" if ENV["HOMEBREW_TEST_GENERIC_OS"]
 
     VERSION = ENV.fetch("HOMEBREW_MACOS_VERSION").chomp.freeze

Library/Homebrew/os/mac/version.rb

@@ -13,22 +13,10 @@ module OS
     class Version < ::Version
       extend T::Sig
 
-      # TODO: when removing symbols here, ensure that they are added to
-      # DEPRECATED_MACOS_VERSIONS in MacOSRequirement.
-      SYMBOLS = {
-        ventura:     "13",
-        monterey:    "12",
-        big_sur:     "11",
-        catalina:    "10.15",
-        mojave:      "10.14",
-        high_sierra: "10.13",
-        sierra:      "10.12",
-        el_capitan:  "10.11",
-      }.freeze
-
       # TODO: bump version when new macOS is released or announced
-      # and also update references in docs/Installation.md and
-      # https://github.com/Homebrew/install/blob/HEAD/install.sh
+      # and also update references in docs/Installation.md,
+      # https://github.com/Homebrew/install/blob/HEAD/install.sh and
+      # OS::Mac::Version (in HOMEBREW_LIBRARY/os.rb)
       NEWEST_UNSUPPORTED = "13"
       private_constant :NEWEST_UNSUPPORTED