Support repository directory in the clone function

lib/download.rb

@@ -109,16 +109,7 @@ module SlackBuilder
   end
 
   private_class_method def self.clone_and_archive(repo, name_version, tarball, tag_prefix = 'v')
-    _, _, version = name_version.rpartition '-'
-
-    rm_rf name_version
-
-    sh 'git', 'clone', repo, name_version
-    sh 'git', '-C', name_version, 'checkout', "#{tag_prefix}#{version}"
-    sh 'git', '-C', name_version, 'submodule', 'update', '--init', '--recursive'
-
-    sh 'tar', 'Jcvf', "slackbuilds/#{tarball}", name_version
-    rm_rf name_version
+    sh './bin/slackbuilder', 'archive', repo, name_version, tarball, tag_prefix
   end
 end