nixpkgs/nixos/tests/cage.nix
Matthew Bauer e0e4d591cc nixos/cage: init
Add a cage module to nixos. This can be used to make kiosk-style
systems that boot directly to a single application. The user (demo by
default) is automatically logged in by this service and the
program (xterm by default) is automatically started.

This is useful for some embedded, single-user systems where we want
automatic booting. To keep the system secure, the user should have
limited privileges.

Based on the service provided in the Cage wiki here:

https://github.com/Hjdskes/cage/wiki/Starting-Cage-on-boot-with-systemd

Co-Authored-By: Florian Klink <flokli@flokli.de>
2020-03-02 13:43:20 -08:00

44 lines
1.5 KiB
Nix

import ./make-test-python.nix ({ pkgs, ...} :
{
name = "cage";
meta = with pkgs.stdenv.lib.maintainers; {
maintainers = [ matthewbauer flokli ];
};
machine = { ... }:
{
imports = [ ./common/user-account.nix ];
services.cage = {
enable = true;
user = "alice";
program = "${pkgs.xterm}/bin/xterm -cm -pc"; # disable color and bold to make OCR easier
};
# this needs a fairly recent kernel, otherwise:
# [backend/drm/util.c:215] Unable to add DRM framebuffer: No such file or directory
# [backend/drm/legacy.c:15] Virtual-1: Failed to set CRTC: No such file or directory
# [backend/drm/util.c:215] Unable to add DRM framebuffer: No such file or directory
# [backend/drm/legacy.c:15] Virtual-1: Failed to set CRTC: No such file or directory
# [backend/drm/drm.c:618] Failed to initialize renderer on connector 'Virtual-1': initial page-flip failed
# [backend/drm/drm.c:701] Failed to initialize renderer for plane
boot.kernelPackages = pkgs.linuxPackages_latest;
virtualisation.memorySize = 1024;
};
enableOCR = true;
testScript = { nodes, ... }: let
user = nodes.machine.config.users.users.alice;
in ''
with subtest("Wait for cage to boot up"):
start_all()
machine.wait_for_file("/run/user/${toString user.uid}/wayland-0.lock")
machine.wait_until_succeeds("pgrep xterm")
machine.wait_for_text("alice@machine")
machine.screenshot("screen")
'';
})