Stager

Stager is a GTK3 GUI for your Python functions to be used during enrolment.

It's simple, the function it calls must return a bool and the row is updated accordingly.

Most of the settings are defaulted but can be easily modified in the config.json file.

For more screenshots visit the experience page

How to install it

git clone <stager url>

pip -e ./stager

How to launch it

stager

or optionally with config

stager --config config.json

How to auto launch it

The easiest way is to create a sudoers file and an autolaunch file

• Create a sudoers file that allows it to run as root

echo "staging ALL=(ALL:ALL) NOPASSWD: /usr/bin/python3" >> /etc/sudoers.d/cpe-stage

chmod 0440 /etc/sudoers.d/cpe-stage

⚠️ Make sure you remove this file as part of staging or afterwards with your management tools

• Create an application auto launch file

mkdir -p /home/staging/.config/autostart

touch /home/staging/.config/autostart/cpe-stage.desktop

chown 1000 /home/staging/.config/autostart/cpe-stage.desktop

nano /home/staging/.config/autostart/cpe-stage.desktop

• Paste in

cpe-stage.desktop

[Desktop Entry]
Type=Application
Exec=sudo /usr/local/bin/stager
Hidden=false
NoDisplay=false
X-GNOME-Autostart-enabled=true
Name[en_US]=CPE Stage
Name=CPE Stage
Comment[en_US]=
Comment=

Disable gnome setup application

touch /home/staging/.config/gnome-initial-setup-done

chown 1000 /home/staging/.config/gnome-initial-setup-done

Launch arguments

Argument	Type	Description
--debug		Increase logging verbosity
--config		Use a custom config file
--auto		Automatically advance through the pages
Testing only		Only use for testing, not in prod
--page	str	Open a specific page on launch
--username	str	Specify a username to be used
--password	str	Specify a password to be used
--cryptkey	str	Specify a crypt key to be used

Config basic

All you need to get started is a list of python functions to run

{
    "tasks": [
        {
            "os_check": {
                "name": "Check OS version",
                "icon_name": "user-desktop",
                "function": "cpe_stage.utils.os_check()",
                "error_message": "Unfortunately you're not running a supported OS version only Ubuntu 20.04 LTS and higher is supported"
            },
            "check_network_connection": {
                "name": "Check network connectivity",
                "icon_name": "emblem-shared",
                "function": "cpe_stage.utils.check_network_connection()",
                "error_message": "📡 Please check your internet connection"
            }
        }
    ]
}

This will run the commands and if they fail stop the process.

Config advanced

The GUI uses a json config file with the following fields:

	Variable name	Type	Description	Optional	Default value
Required Fields
	tasks	list	A list of tasks to run	No
Tasks
	name	str	Name of the task	No
	icon	str	Path to the image icon (16px x px)	No
	icon_name	str	Name of the system icon to use (gtk3-icon-browser)	No
	function	str	The python function to run	No
	returns	str	What the function returns	Yes	bool
	hidden	bool	Hide the task from the UI	Yes	False
	halt_on_error	bool	If this task fails stop staging	Yes	False
	error_message	str	The message to display on the failed task window	Yes	None
Optional Fields
UI	Variable name	Type	Description	Optional	Default value
	app_title	str	Title for the application	Yes	Stager
	app_icon	str	Filename for the icon for the application from the assets folder	Yes	app_icon.png
	hero_logo	str	Filename for the logo to display from the assets folder	Yes	logo.png
	hero_text	str	Text under the logo	Yes	None
	always_on_top	bool	Keep the window on top of all others	Yes	True
	show_window_buttons	bool	Show the window decorations	Yes	True
	progres s_percentage	bool	Show a % above the progress bar	Yes	False
	show_hidden	bool	Show any hidden tasks	Yes	False
	welcome_emoji	str	The jumboji to show on the welcome screen, this will be overridden with an image if provided	Yes	💻
	welcome_image	str	An image filename to replace the jumboji	Yes	None
	welcome_text	str	The text to display at the Welcome screen	Yes	Welcome to your new computer!\n\nWe've got lots of work to do, click below to get started
	username_text	str	The text to display above the username and password field. If you have the word email the placeholder will change to Email address	Yes	Enter a username and password for your new local account
	username_icon	str	The Gtk icon name to show next to the username text	Yes	user-info
	encryption_text	str	The text to display above the disk encryption field	Yes	Enter a new disk encryption password
	encryption_icon	str	The Gtk icon name to show next to the encryption text	Yes	network-wireless-encrypted
	finished_text_top	str	The text to display above the finished jumboji	Yes	That was easy!
	finished_emoji	str	The emoji to show on the finished page	Yes	🎉
	finished_text_bottom	str	The text to display below the finished jumboji	Yes	We're all done!
	finished_text_reboot	str	The text to show if rebooting	Yes	We're all done!\n\n This computer will reboot in
	finished_text_quit	str	Show a splash screen at the end of staging	Yes	We're all done!
	reboot_delay	int	How long to wait (sec) until auto reboot (requires reboot_when_done: True)	Yes	5
	logo_height	int	How high the logo should be	Yes	128
	logo_width	int	How wide the logo should be	Yes	128
	status_inprogress	str	The Gtk icon to use for the task in the state	Yes	gtk.spinner
	status_pending	str	The Gtk icon to use for the task in the pending state	Yes	None
	status_completed	str	The Gtk icon to use for the task in the completed state	Yes	emblem-default
	status_failed	str	The Gtk icon to use for the task in the failed state	Yes	emblem-important
	input_valid	str	The Gtk icon to use for the validation check pass	Yes	emblem-important
	input_invalid	str	The Gtk icon to use for the validation check fail	Yes	emblem-important
Operational	Variable name	Type	Description	Optional	Default value
	asset_location	str	Path where all the assets are stored	Yes	/root/stager/assets
	reboot_when_done	bool	Reboot when all tasks are completed	Yes	True
	halt_on_error	bool	If any task fails stop staging	Yes	True
	dry_run	bool	No tasks are run, True response is mocked	Yes	False
	import_modules	list	A list of modules to import	Yes	[]
Functional	Variable name	Type	Description	Optional	Default value
	disallowed_usernames	list	A list of usernames you don't want to be accepted by validation	Yes	["root","admin","test","guest","administrator","user1",""]
	password_minimum_length	int	The minimum length of a valid password	Yes	6
	password_mixed_case	bool	Should the password require mixed case	Yes	True
	password_contains_digit	bool	Should the password require a digit	Yes	True
	password_contains_special_character	bool	Should the password require special characters	Yes	True
	password_deny_list	list	A list of passwords you don't want to be accepted by validation	Yes	["root","admin","test","guest","Welcome123!","Pa55word!","Password123!",""]
	crypt_key_minimum_length	int	The minimum length of a valid crypt key	Yes	6
	crypt_key_mixed_case	bool	Should the password require mixed case	Yes	True
	crypt_key_contains_digit	bool	Should the password require a digit	Yes	True
	crypt_key_contains_special_character	bool	Should the password require special characters	Yes	True

Inputs

This tool supports two common inputs.

• Username and password

  If you have any mention of username and/or password in your python function arguments the username / password window will be shown.

  e.g.

  create_user(username, password)

• Crypt key

  If you have any mention of crypt_key in your python function arguments the encryption password window will be shown.

  e.g.

  encrypt_disk(crypt_key)

Worth reading

https://python-gtk-3-tutorial.readthedocs.io/en/latest/introduction.html

https://lazka.github.io/pgi-docs/index.html#Gtk-3.0/

https://athenajc.gitbooks.io/python-gtk-3-api/content/

https://docs.gtk.org/gtk3/

https://glade.gnome.org/