+#
+# TODO(twp): add the *.in files directory to the source tree, and
+# when expanding them, add them to the "generated" directory with
+# the same tree structure as in the original source. Then all
+# the files can be added to the docker container with a single ADD.
+
+Dir.glob('*/generated/*') do |stale_file|
+ File.delete(stale_file)
+end