list: Replace Cask::Cmd with class method

Library/Homebrew/cask/cmd/list.rb

@@ -31,30 +31,39 @@ module Cask
       end
 
       def run
-        output = args.any? ? provided_list : Caskroom.casks
+        self.class.list_casks(
+          *casks,
+          json:      json?,
+          one:       one?,
+          full_name: full_name?,
+          versions:  versions?,
+        )
+      end
 
-        if json?
+      def self.list_casks(*casks, json: false, one: false, full_name: false, versions: false)
+        output = if casks.any?
+          casks.each do |cask|
+            raise CaskNotInstalledError, cask unless cask.installed?
+          end
+        else
+          Caskroom.casks
+        end
+
+        if json
           puts JSON.generate(output.map(&:to_h))
-        elsif one?
+        elsif one
           puts output.map(&:to_s)
-        elsif full_name?
+        elsif full_name
           puts output.map(&:full_name).sort(&tap_and_name_comparison)
-        elsif versions?
-          puts output.map(&self.class.method(:format_versioned))
-        elsif !output.empty? && args.any?
-          puts output.map(&self.class.method(:list_artifacts))
+        elsif versions
+          puts output.map(&method(:format_versioned))
+        elsif !output.empty? && casks.any?
+          puts output.map(&method(:list_artifacts))
         elsif !output.empty?
           puts Formatter.columns(output.map(&:to_s))
         end
       end
 
-      def provided_list
-        casks.each do |cask|
-          raise CaskNotInstalledError, cask unless cask.installed?
-        end
-        casks
-      end
-
       def self.list_artifacts(cask)
         cask.artifacts.group_by(&:class).each do |klass, artifacts|
           next unless klass.respond_to?(:english_description)

Library/Homebrew/cmd/list.rb

@@ -168,11 +168,12 @@ module Homebrew
   end
 
   def list_casks(args:)
-    cask_list = Cask::Cmd::List.new args.named
-    cask_list.one = args.public_send(:'1?')
-    cask_list.versions = args.versions?
-    cask_list.full_name = args.full_name?
-    cask_list.run
+    Cask::Cmd::List.list_casks(
+      *args.loaded_casks,
+      one:       args.public_send(:'1?'),
+      full_name: args.full_name?,
+      versions:  args.versions?,
+    )
   end
 end