IPython Notebook: Explicitly add environment variable around wrapper and use...

IPython Notebook: Explicitly add environment variable around wrapper and use ipython directory inside instance in env

[ kirr: By default IPython keeps configuration and other files location in
  ~/.ipython . What this patch does is organize explicit directory in instance
  tree to keep such files  ]

/reviewed-by @kirr  (on nexedi/slapos!33)

software/ipython_notebook/instance.cfg.in

@@ -81,6 +81,8 @@ command-line =
   --config=${ipython-notebook-config:rendered}
 wrapper-path = ${directory:service}/ipython_notebook
 parameters-extra = true
+# Explicitly define IPython Directory to be used while starting ipython notebook
+environment = IPYTHONDIR=${directory:ipython_dir}
 
 [ipython-notebook-config]
 <= dynamic-jinja2-template-base
@@ -117,6 +119,9 @@ service = ${:etc}/service
 promise = ${:etc}/promise/
 log = ${:var}/log
 notebook_dir = ${:var}/notebooks
+# Add folders to explicitly define ipython directory
+ipython_dir = ${:home}/ipython
+ipython_kernel_dir = ${:ipython_dir}/kernels
 
 [publish-connection-parameter]
 recipe = slapos.cookbook:publish

software/ipython_notebook/software.cfg

@@ -44,7 +44,7 @@ recipe = slapos.recipe.template:jinja2
 template = ${:_profile_base_location_}/instance.cfg.in
 rendered = ${buildout:directory}/template.cfg
 mode = 0644
-md5sum = 3cf8e0d61d4eb17201164239571f247a
+md5sum = e67b3cc33db32993a70895173e7b0150
 context =
   key bin_directory buildout:bin-directory
   key develop_eggs_directory buildout:develop-eggs-directory