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
@@ -108,55 +109,73 @@ 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?
+        raise UsageError if name.empty?
 
-          rack = Formulary.to_rack(name.downcase)
+        rack = Formulary.to_rack(name.downcase)
 
-          dirs = rack.directory? ? rack.subdirs : []
+        dirs = rack.directory? ? rack.subdirs : []
 
-          if dirs.empty?
-            if (reason = Homebrew::MissingFormula.suggest_command(name, "uninstall"))
-              $stderr.puts reason
-            end
-            raise NoSuchKegError, rack.basename
-          end
+        raise NoSuchKegError, rack.basename if dirs.empty?
 
-          linked_keg_ref = HOMEBREW_LINKED_KEGS/rack.basename
-          opt_prefix = HOMEBREW_PREFIX/"opt/#{rack.basename}"
+        linked_keg_ref = HOMEBREW_LINKED_KEGS/rack.basename
+        opt_prefix = HOMEBREW_PREFIX/"opt/#{rack.basename}"
 
-          begin
-            if opt_prefix.symlink? && opt_prefix.directory?
-              Keg.new(opt_prefix.resolved_path)
-            elsif linked_keg_ref.symlink? && linked_keg_ref.directory?
-              Keg.new(linked_keg_ref.resolved_path)
-            elsif dirs.length == 1
-              Keg.new(dirs.first)
+        begin
+          if opt_prefix.symlink? && opt_prefix.directory?
+            Keg.new(opt_prefix.resolved_path)
+          elsif linked_keg_ref.symlink? && linked_keg_ref.directory?
+            Keg.new(linked_keg_ref.resolved_path)
+          elsif dirs.length == 1
+            Keg.new(dirs.first)
+          else
+            f = if name.include?("/") || File.exist?(name)
+              Formulary.factory(name)
             else
-              f = if name.include?("/") || File.exist?(name)
-                Formulary.factory(name)
-              else
-                Formulary.from_rack(rack)
-              end
-
-              unless (prefix = f.installed_prefix).directory?
-                raise MultipleVersionsInstalledError, rack.basename
-              end
-
-              Keg.new(prefix)
+              Formulary.from_rack(rack)
             end
-          rescue FormulaUnavailableError
-            raise <<~EOS
-              Multiple kegs installed to #{rack}
-              However we don't know which one you refer to.
-              Please delete (with rm -rf!) all but one and then try again.
-            EOS
+
+            unless (prefix = f.installed_prefix).directory?
+              raise MultipleVersionsInstalledError, rack.basename
+            end
+
+            Keg.new(prefix)
           end
-        end.freeze
+        rescue FormulaUnavailableError
+          raise <<~EOS
+            Multiple kegs installed to #{rack}
+            However we don't know which one you refer to.
+            Please delete (with rm -rf!) all but one and then try again.
+          EOS
+        end
       end
 
       def build_stable?