Add `Formatter::pluralize`.

1 files changed, 16 insertions, 0 deletions

diff --git a/Library/Homebrew/utils/formatter.rb b/Library/Homebrew/utils/formatter.rb
index 8a9afb9af..88616c6f8 100644
--- a/Library/Homebrew/utils/formatter.rb
+++ b/Library/Homebrew/utils/formatter.rb
@@ -90,4 +90,20 @@ module Formatter
 
     output
   end
+
+  def pluralize(count, singular, plural = nil)
+    return "#{count} #{singular}" if count == 1
+
+    *adjectives, noun = singular.split(" ")
+
+    if plural.nil?
+      plural = {
+        "formula" => "formulae",
+      }.fetch(noun, "#{noun}s")
+    end
+
+    words = adjectives << plural
+
+    "#{count} #{words.join(" ")}"
+  end
 end