@url{http://news.dieweltistgarnichtso.net/bin/redo-sh.html, redo-sh.tests}
and implementation-neutral ones from @command{apenwarr/redo}.
+If you are not familiar with the redo, then here are advisable links to read:
+
+@itemize
+@item @url{https://redo.readthedocs.io/en/latest/, apenwarr/redo documentation}
+@item @url{http://jdebp.eu/FGA/introduction-to-redo.html, Introduction to redo}
+@item @url{https://apenwarr.ca/log/20101214, The only build system that might someday replace make... is djb redo}
+@end itemize
+
@command{goredo} is
@url{https://www.gnu.org/philosophy/pragmatic.html, copylefted}
@url{https://www.gnu.org/philosophy/free-sw.html, free software}