Draft implementation to replace ActiveSupport inflections

Library/Homebrew/cask/cmd/install.rb

@@ -85,7 +85,7 @@ module Cask
 
         if dry_run
           if (casks_to_install = casks.reject(&:installed?).presence)
-            plural = "cask".pluralize(casks_to_install.count)
+            plural = ::Utils::Inflection.number(casks_to_install.count, "cask")
             ohai "Would install #{casks_to_install.count} #{plural}:"
             puts casks_to_install.map(&:full_name).join(" ")
           end
@@ -97,7 +97,7 @@ module Cask
                                      .map(&:name)
             next if dep_names.blank?
 
-            plural = "dependency".pluralize(dep_names.count)
+            plural = ::Utils::Inflection.number(dep_names.count, "dependenc", "ies", "y")
             ohai "Would install #{dep_names.count} #{plural} for #{cask.full_name}:"
             puts dep_names.join(" ")
           end

Library/Homebrew/cask/cmd/uninstall.rb

@@ -46,7 +46,7 @@ module Cask
           next if (versions = cask.versions).empty?
 
           puts <<~EOS
-            #{cask} #{versions.to_sentence} #{"is".pluralize(versions.count)} still installed.
+            #{cask} #{versions.to_sentence} #{::Utils::Inflection.number(versions.count, "", "are", "is")} still installed.
             Remove #{(versions.count == 1) ? "it" : "them all"} with `brew uninstall --cask --force #{cask}`.
           EOS
         end

Library/Homebrew/cask/cmd/upgrade.rb

@@ -121,7 +121,7 @@ module Cask
 
         if manual_installer_casks.present?
           count = manual_installer_casks.count
-          ofail "Not upgrading #{count} `installer manual` #{"cask".pluralize(count)}."
+          ofail "Not upgrading #{count} `installer manual` #{::Utils::Inflection.number(versions.count, "cask")}."
           puts manual_installer_casks.map(&:to_s)
           outdated_casks -= manual_installer_casks
         end
@@ -142,7 +142,7 @@ module Cask
         end
 
         verb = dry_run ? "Would upgrade" : "Upgrading"
-        oh1 "#{verb} #{outdated_casks.count} outdated #{"package".pluralize(outdated_casks.count)}:"
+        oh1 "#{verb} #{outdated_casks.count} outdated #{::Utils::Inflection.number(outdated_casks.count, "package")}:"
 
         caught_exceptions = []
 

Library/Homebrew/utils.rb

@@ -12,6 +12,7 @@ require "utils/git"
 require "utils/git_repository"
 require "utils/github"
 require "utils/gzip"
+require "utils/inflection"
 require "utils/inreplace"
 require "utils/link"
 require "utils/popen"

Library/Homebrew/utils/inflection.rb

@@ -0,0 +1,18 @@
+# typed: strict
+# frozen_string_literal: true
+
+module Utils
+  # Inflection utility methods, as a lightweight alternative to `ActiveSupport::Inflector``.
+  #
+  # @api private
+  module Inflection
+    extend T::Sig
+
+    # Combines `stem`` with the `singular`` or `plural` suffix based on `count`.
+    sig { params(count: Integer, stem: String, plural: String, singular: String).returns(String) }
+    def self.number(count, stem, plural = "s", singular = "")
+      suffix = (count == 1) ? singular : plural
+      "#{stem}#{suffix}"
+    end
+  end
+end