allow empty repos on import/export

lib/gitlab/import_export/importer.rb

@@ -44,8 +44,7 @@ module Gitlab
       def wiki_restorer
         Gitlab::ImportExport::RepoRestorer.new(path_to_bundle: wiki_repo_path,
                                                shared: @shared,
-                                               project: ProjectWiki.new(project_tree.restored_project),
-                                               wiki: true)
+                                               project: ProjectWiki.new(project_tree.restored_project))
       end
       def uploads_restorer

lib/gitlab/import_export/repo_restorer.rb

@@ -3,15 +3,14 @@ module Gitlab
     class RepoRestorer
       include Gitlab::ImportExport::CommandLineUtil
-      def initialize(project:, shared:, path_to_bundle:, wiki: false)
+      def initialize(project:, shared:, path_to_bundle:)
         @project = project
         @path_to_bundle = path_to_bundle
         @shared = shared
-        @wiki = wiki
       end
       def restore
-        return wiki? unless File.exist?(@path_to_bundle)
+        return true unless File.exist?(@path_to_bundle)
         FileUtils.mkdir_p(path_to_repo)
@@ -30,10 +29,6 @@ module Gitlab
       def path_to_repo
         @project.repository.path_to_repo
       end
-
-      def wiki?
-        @wiki
-      end
     end
   end
 end

lib/gitlab/import_export/repo_saver.rb

@@ -11,7 +11,7 @@ module Gitlab
       end
       def save
-        return false if @project.empty_repo?
+        return true if @project.empty_repo? # it's ok to have no repo
         @full_path = File.join(@shared.export_path, ImportExport.project_bundle_filename)
         bundle_to_disk

lib/gitlab/import_export/wiki_repo_saver.rb

@@ -4,6 +4,7 @@ module Gitlab
       def save
         @wiki = ProjectWiki.new(@project)
         return true unless wiki_repository_exists? # it's okay to have no Wiki
+
         bundle_to_disk(File.join(@shared.export_path, project_filename))
       end