More expansive info on builder

lib/mrsk/commands/builder.rb

@@ -1,7 +1,7 @@
 require "mrsk/commands/base"
 
 class Mrsk::Commands::Builder < Mrsk::Commands::Base
-  delegate :create, :remove, :push, :pull, to: :target
+  delegate :create, :remove, :push, :pull, :info, to: :target
   delegate :native?, :multiarch?, :remote?, to: :name
 
   def name

lib/mrsk/commands/builder/multiarch.rb

@@ -16,4 +16,10 @@ class Mrsk::Commands::Builder::Multiarch < Mrsk::Commands::Base
   def pull
     docker :pull, config.absolute_image
   end
+
+  def info
+    combine \
+      docker(:context, :ls),
+      docker(:buildx, :ls)
+  end
 end

lib/mrsk/commands/builder/native.rb

@@ -18,4 +18,8 @@ class Mrsk::Commands::Builder::Native < Mrsk::Commands::Base
   def pull
     docker :pull, config.absolute_image
   end
+
+  def info
+    # No-op on native
+  end
 end

lib/tasks/mrsk/build.rake

@@ -45,6 +45,7 @@ namespace :mrsk do
     task :info do
       run_locally do
         puts "Builder: #{MRSK.builder.name} (#{MRSK.builder.target.class.name})"
+        puts capture(*MRSK.builder.info)
       end
     end
   end