args: Add field for kegs and unknowns

Library/Homebrew/cli/args.rb

@@ -39,6 +39,7 @@ module Homebrew
         @formulae_paths = nil
         @casks = nil
         @kegs = nil
+        @kegs_and_unknowns = nil
 
         self[:named_args] = named_args
         self[:named_args].freeze
@@ -108,23 +109,42 @@ module Homebrew
       end
 
       def kegs
+        @kegs ||= downcased_unique_named.map do |name|
+          resolve_keg name
+        rescue NoSuchKegError => e
+          if (reason = Homebrew::MissingFormula.suggest_command(name, "uninstall"))
+            $stderr.puts reason
+          end
+          raise e
+        end.freeze
+      end
+
+      def kegs_and_unknowns
+        return @kegs_and_unknowns if @kegs_and_unknowns
+
+        kegs = []
+        unknowns = []
+        downcased_unique_named.each do |name|
+          kegs << resolve_keg(name)
+        rescue NoSuchKegError
+          unknowns << name
+        end
+
+        @kegs_and_unknowns = [kegs, unknowns]
+      end
+
+      def resolve_keg(name)
         require "keg"
         require "formula"
         require "missing_formula"
 
-        @kegs ||= downcased_unique_named.map do |name|
         raise UsageError if name.empty?
 
         rack = Formulary.to_rack(name.downcase)
 
         dirs = rack.directory? ? rack.subdirs : []
 
-          if dirs.empty?
+        raise NoSuchKegError, rack.basename if dirs.empty?
-            if (reason = Homebrew::MissingFormula.suggest_command(name, "uninstall"))
-              $stderr.puts reason
-            end
-            raise NoSuchKegError, rack.basename
-          end
 
         linked_keg_ref = HOMEBREW_LINKED_KEGS/rack.basename
         opt_prefix = HOMEBREW_PREFIX/"opt/#{rack.basename}"
@@ -156,7 +176,6 @@ module Homebrew
             Please delete (with rm -rf!) all but one and then try again.
           EOS
         end
-        end.freeze
       end
 
       def build_stable?