jupyterhub: get node/npm from nodesource

jupyterhub/tasks/main.yml

+# This first task is actually required by ijavascript
+# to get a recent version of node (jessie-backports contains one, but with no
+# npm…)
+# Seems un-needed on strecth (but not tested)
+- name: Install node from nodesource as ijs wont run with node 0.10x
+  include: nodesource.yml
+
 - name: install apt dependencies
   apt: pkg={{ item }} update_cache=yes cache_valid_time=1800
   with_items:
-    - npm
-    - nodejs-legacy
+    #- npm           # Taken care by nodesource step
+    #- nodejs-legacy # Taken care by nodesource step
     - virtualenv
     - python3-dev
 

jupyterhub/tasks/nodesource.yml

+# Install Node.js using packages crafted by NodeSource
+# After https://github.com/nodesource/ansible-nodejs-role, MIT License
+---
+- name: Ensure the system can use the HTTPS transport for APT
+  stat:
+    path: /usr/lib/apt/methods/https
+  register: apt_https_transport
+
+- name: Install HTTPS transport for APT
+  apt:
+    pkg: apt-transport-https
+    state: installed
+  when: not apt_https_transport.stat.exists
+
+- name: Import the NodeSource GPG key into apt
+  apt_key:
+    url: https://keyserver.ubuntu.com/pks/lookup?op=get&fingerprint=on&search=0x1655A0AB68576280
+    id: "68576280"
+    state: present
+
+- name: Add NodeSource deb repository
+  apt_repository:
+    repo: 'deb https://deb.nodesource.com/node_4.x {{ ansible_distribution_release }} main'
+    state: present
+
+- name: Add NodeSource deb-src repository
+  apt_repository:
+    repo: 'deb-src https://deb.nodesource.com/node_4.x {{ ansible_distribution_release }} main'
+    state: present
+
+- name: Add NodeSource repository preferences
+  template:
+    src: deb_nodesource_com_node.pref.j2
+    dest: /etc/apt/preferences.d/deb_nodesource_com_node.pref
+
+- name: Install Node.js
+  apt:
+    pkg: nodejs
+    state: installed
+    update_cache: yes
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jupyterhub/templates/deb_nodesource_com_node.pref.j2

+# {{ ansible_managed }}
+
+Package: *
+Pin: release o=Node Source
+Pin-Priority: 500
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