1 files changed, 36 insertions, 0 deletions
diff --git a/lib/gitlab/import_export/version_checker.rb b/lib/gitlab/import_export/version_checker.rb
new file mode 100644
index 00000000000..cf5c62c5e3c
--- /dev/null
+++ b/lib/gitlab/import_export/version_checker.rb
@@ -0,0 +1,36 @@
+module Gitlab
+  module ImportExport
+    class VersionChecker
+
+      def self.check!(*args)
+        new(*args).check!
+      end
+
+      def initialize(shared:)
+        @shared = shared
+      end
+
+      def check!
+        version = File.open(version_file, &:readline)
+        verify_version!(version)
+      rescue => e
+        @shared.error(e)
+        false
+      end
+
+      private
+
+      def version_file
+        File.join(@shared.export_path, Gitlab::ImportExport.version_filename)
+      end
+
+      def verify_version!(version)
+        if Gem::Version.new(version) > Gem::Version.new(Gitlab::ImportExport.version)
+          raise Gitlab::ImportExport::Error("Import version mismatch: Required <= #{Gitlab::ImportExport.version} but was #{version}")
+        else
+          true
+        end
+      end
+    end
+  end
+end