playbook: Introduce nexedi-laptop playbook

The general idea is to provide a machine connected to re6st, registered as
computer in SlapOS Master and with thorwable user to work on it.

Starting from default installation some uneeded packages are removed, and
few expected ones are added in order to have common set of packages and use
scenarios across all installations.

playbook/nexedi-laptop.yml

+# Prepares computer as standard Nexedi laptop -- https://deploy.erp5.net/nexedi-laptop
+#  Optional
+#    * automatic monitoring
+#    * data on encrypted key
+- name: Nexedi laptop configuration
+  hosts: 127.0.0.1
+  connection: local
+
+  vars:
+    partition_number: 10
+
+  vars_files:
+    - settings/gnet.yml
+    - settings/slapos-master.yml
+
+  vars_prompt:
+    - name: "computer_name"
+      prompt: "Name your computer (ignore if you already have a configured re6st and slapos or if you don't want to register your computer to SlapOS Master):"
+      private: no
+      default: "noname"
+
+    - name: "re6sttoken"
+      prompt: "\n\n
+Please insert your token from Grandenet to configure your computer.\n
+If you don't have a token, please access http://www.grandenet.cn/en \n
+and request one. \n\n
+Move informations at http://www.grandenet.cn/en/documentation/user
+\n\n
+
+Your token
+"
+      private: no
+      default: "notoken"
+
+  pre_tasks:
+    - pause:
+        prompt: "Input your slapos token (ignore if you already have a configured slapos) [notoken]"
+      when: computer_name != "noname"
+      register: prompt
+    - set_fact:
+        slapostoken: "{{ prompt.user_input | default('notoken', true) }}"
+
+    - pause:
+        prompt: "Which network interface are you using? (ignore if you already have a configured re6st) [lo]"
+      when: slapostoken != "notoken"
+      register: prompt
+    - set_fact:
+        interface_name: "{{ prompt.user_input | default('lo', true) }}"
+
+  roles:
+    - { role: re6stnet-install }
+    - { role: re6stnet-ensure-running }
+    - { role: slapos, package_state: present }
+    - nexedi-laptop

playbook/roles/nexedi-laptop/files/archive_nxdlap.sh

+#!/bin/sh
+mv /home/nxdlap /home/nxdlap.`date '+%Y%m%d%H%M%S'`
+mkdir -p /home/nxdlap
+chown nxdlap:nxdlap /home/nxdlap

playbook/roles/nexedi-laptop/tasks/main.yml

+  - name: Remove not needed packages
+    apt:
+      pkg:
+        - aisleriot
+        - firefox
+        - gedit
+        - gnome-mahjongg
+        - gnome-mines
+        - gnome-todo
+        - gnome-sudoku
+        - libreoffice-core
+        - rhythmbox
+        - thunderbird
+        - totem
+        - transmission-gtk
+      state: absent
+      autoremove: yes
+    when: ansible_distribution == "Ubuntu" and ansible_distribution_release == "focal"
+  - name: Install standard nexedi laptop packages
+    apt:
+      pkg:
+        - chromium-browser
+        - git
+        - ubuntu-desktop
+  - name: Add the user 'nxdlap'
+    user:
+      name: nxdlap
+      comment: nxdlap (Nexedi Laptop User)
+      groups: adm,cdrom,sudo,dip,plugdev,lpadmin,lxd,sambashare
+      password: '*'
+      update_password: on_create
+  - name: Create archive script
+    copy:
+      src: archive_nxdlap.sh
+      dest: /usr/local/bin/archive_nxdlap.sh
+      mode: 0700
+  - name: Remove (archive in reality) nxdlap contents on each reboot
+    cron:
+      name: "Remove (archive in reality) nxdlap contents on each reboot"
+      special_time: reboot
+      job: "/usr/local/bin/archive_nxdlap.sh"
+      cron_file: ansible-nxdlap-archive
+      user: root
+  - name: Explain
+    debug:
+      # XXX: Check password status of the account and then tell correctly
+      msg: On first run nxdlap user password is locked, please use 'passwd nxdlap' to set the password and activate the user, otherwise feel free to change the password if needed