I hope ~:mkdirp~ header argument can also work for other related header arguments
like ~:dir~, ~:file~ etc not just ~:tangle~. Like following example.

#+begin_src sh :mkdirp yes :dir "data/code/mkdirp/dir" :file "test" :results file link
echo "hello"
#+end_src

So I added a simple patch to make it work.

(I posted message before, but I forgot to update the subject which might be
ignored, so I post a new one again.)