Let `Artifact::for_cask` return artifact instances.

Library/Homebrew/cask/lib/hbc/artifact.rb

@@ -56,12 +56,12 @@ module Hbc
       ]
     end
 
-    def self.for_cask(cask)
+    def self.for_cask(cask, command: SystemCommand, force: false)
       odebug "Determining which artifacts are present in Cask #{cask}"
-      artifacts.select do |artifact|
-        odebug "Checking for artifact class #{artifact}"
-        artifact.me?(cask)
-      end
+
+      artifacts
+        .select { |klass| klass.me?(cask) }
+        .map { |klass| klass.new(cask, command: command, force: force) }
     end
   end
 end

Library/Homebrew/cask/lib/hbc/cli/list.rb

@@ -55,7 +55,7 @@ module Hbc
 
       def self.list_artifacts(cask)
         Artifact.for_cask(cask).each do |artifact|
-          summary = artifact.new(cask).summary
+          summary = artifact.summary
           ohai summary[:english_description], summary[:contents] unless summary.empty?
         end
       end

Library/Homebrew/cask/lib/hbc/installer.rb

@@ -133,16 +133,14 @@ module Hbc
 
     def install_artifacts
       already_installed_artifacts = []
-      options = { command: @command, force: force }
 
       odebug "Installing artifacts"
-      artifacts = Artifact.for_cask(@cask)
+      artifacts = Artifact.for_cask(@cask, command: @command, force: force)
       odebug "#{artifacts.length} artifact/s defined", artifacts
 
       artifacts.each do |artifact|
-        artifact = artifact.new(@cask, options)
         next unless artifact.respond_to?(:install_phase)
-        odebug "Installing artifact of class #{artifact}"
+        odebug "Installing artifact of class #{artifact.class}"
         artifact.install_phase
         already_installed_artifacts.unshift(artifact)
       end
@@ -150,7 +148,7 @@ module Hbc
       begin
         already_installed_artifacts.each do |artifact|
           next unless artifact.respond_to?(:uninstall_phase)
-          odebug "Reverting installation of artifact of class #{artifact}"
+          odebug "Reverting installation of artifact of class #{artifact.class}"
           artifact.uninstall_phase
         end
       ensure
@@ -319,13 +317,11 @@ module Hbc
 
     def uninstall_artifacts
       odebug "Un-installing artifacts"
-      artifacts = Artifact.for_cask(@cask)
+      artifacts = Artifact.for_cask(@cask, command: @command, force: force)
       odebug "#{artifacts.length} artifact/s defined", artifacts
       artifacts.each do |artifact|
-        options = { command: @command, force: force }
-        artifact = artifact.new(@cask, options)
         next unless artifact.respond_to?(:uninstall_phase)
-        odebug "Un-installing artifact of class #{artifact}"
+        odebug "Un-installing artifact of class #{artifact.class}"
         artifact.uninstall_phase
       end
     end