added my buildout

component/jupyter_renderjs/buildout.cfg

+[buildout]
+parts =
+  renderjs_nbextension
+
+
+# renderjs_nbextension installed from latest git version
+[renderjs_nbextension]
+recipe = zc.recipe.egg:develop
+egg = renderjs_nbextension
+setup = ${renderjs_nbextension-submoduleinit:location}/renderjs_nbextension
+
+
+[renderjs_nbextension-repository]
+recipe  = slapos.recipe.build:gitclone
+repository = https://lab.nexedi.com/Kreisel/renderjs_extension.git
+# dir is pretty name as top-level -dev recipe
+location = ${buildout:parts-directory}/renderjs_nbextension
+git-executable = /sbin/git
+
+
+# TODO add `git clone --recursive` to slapos.recipe.build:gitclone
+#      and this way merge this -submoduleinit into -repository part
+[renderjs_nbextension-submoduleinit]
+recipe = plone.recipe.command
+command = cd "${renderjs_nbextension-repository:location}" && /sbin/git submodule update --init
+stop-on-error = true
+# propagate location of main repo
+location= ${renderjs_nbextension-repository:location}
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