cache: alert user when no formula or cask matches the argument

Library/Homebrew/cli/args.rb

@@ -108,23 +108,6 @@ module Homebrew
                                          .freeze
       end
 
-      def formulae_and_casks
-        require "cask/cask_loader"
-        require "cask/exceptions"
-
-        @formulae_and_casks ||= downcased_unique_named.map do |name|
-          begin
-            Formulary.factory(name, spec)
-          rescue FormulaUnavailableError => e
-            begin
-              Cask::CaskLoader.load(name)
-            rescue Cask::CaskUnavailableError
-              raise e
-            end
-          end
-        end.uniq.freeze
-      end
-
       def kegs
         require "keg"
         require "formula"

Library/Homebrew/cmd/--cache.rb

@@ -3,6 +3,7 @@
 require "fetch"
 require "cli/parser"
 require "cask/cmd"
+require "cask/cask_loader"
 
 module Homebrew
   module_function
@@ -30,18 +31,21 @@ module Homebrew
     if args.no_named?
       puts HOMEBREW_CACHE
     else
-      args.formulae_and_casks.each do |formula_or_cask|
+      args.named.each do |name|
-        case formula_or_cask
+        begin
-        when Formula
+          formula = Formulary.factory name
-          formula = formula_or_cask
           if Fetch.fetch_bottle?(formula)
             puts formula.bottle.cached_download
           else
             puts formula.cached_download
           end
-        when Cask::Cask
+        rescue FormulaUnavailableError => e
-          cask = formula_or_cask
+          begin
-          puts "cask: #{Cask::Cmd::Cache.cached_location(cask)}"
+            cask = Cask::CaskLoader.load name
+            puts "cask: #{Cask::Cmd::Cache.cached_location(cask)}"
+          rescue Cask::CaskUnavailableError
+            ofail "No available formula or cask with the name \"#{name}\""
+          end
         end
       end
     end