Add parallelization to tootctl search deploy (#12051)

* Add parallel gem

* Modify parallel option in tootctl search deploy

* Add paralell option to tootctl search deploy

* Change 1 to false

* Clean up

* Rename --parallel to --processes

lib/mastodon/search_cli.rb

@@ -6,6 +6,7 @@ require_relative 'cli_helper'
 
 module Mastodon
   class SearchCLI < Thor
+    option :processes, default: 2, aliases: [:p]
     desc 'deploy', 'Create or update an ElasticSearch index and populate it'
     long_desc <<~LONG_DESC
       If ElasticSearch is empty, this command will create the necessary indices
@@ -13,10 +14,28 @@ module Mastodon
 
       This command will also upgrade indices if the underlying schema has been
       changed since the last run.
+
+      With the --processes option, parallelize execution of the command. The
+      default is 2. If "auto" is specified, the number is automatically
+      derived from available CPUs.
     LONG_DESC
     def deploy
-      processed = Chewy::RakeHelper.upgrade
-      Chewy::RakeHelper.sync(except: processed)
+      processed = Chewy::RakeHelper.upgrade(parallel: processes)
+      Chewy::RakeHelper.sync(except: processed, parallel: processes)
+    end
+
+    private
+
+    def processes
+      return true if options[:processes] == 'auto'
+
+      num = options[:processes].to_i
+
+      if num < 2
+        nil
+      else
+        num
+      end
     end
   end
 end