277 lines
8.4 KiB
Python
277 lines
8.4 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# === This file is part of Calamares - <https://github.com/calamares> ===
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#
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# Calamares is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Calamares is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Calamares. If not, see <http://www.gnu.org/licenses/>.
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#
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# SPDX-FileCopyrightText: 2019 Adriaan de Groot <groot@kde.org>
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# SPDX-License-Identifier: GPL-3.0-or-later
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#
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"""
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=== NixOS Configuration
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NixOS has its own "do all the things" configuration file which
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declaratively handles what things need to be done in the target
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system, and it has an existing tool to "execute" that declarative
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specification. This module takes configuration values set by
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Calamares viewmodules (e.g. the users module) and puts
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them into the configuration file in the target system,
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and then runs the necessary NixOS specific tools.
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"""
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import libcalamares
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import os
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from time import gmtime, strftime, sleep
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import gettext
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_ = gettext.translation("calamares-python",
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localedir=libcalamares.utils.gettext_path(),
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languages=libcalamares.utils.gettext_languages(),
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fallback=True).gettext
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# The following long **long** string is the entire text of
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# a nix-configuration file. It is cribbed from, and adapted from,
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# the sample file in https://github.com/itamar567/dotnix .
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#
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# We are going to substitute values into this text. However,
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# Python's .format() function wants parens { } around variable
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# names, and Nix's config file wants to use parens { } for block
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# structure. So we have a compromise format here:
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#
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# - Write the config file as you would normally,
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# - Write @@variable@@ instead of {variable}
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#
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# Some minor trickery later will massage this and substitute variables.
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#
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configuration_nix_sample = """# Nix configuration file
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{ config, pkgs, ... }:
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{
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imports =
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[ # Include the results of the hardware scan.
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./hardware-configuration.nix
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./command-not-found/command-not-found.nix
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];
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# Use the systemd-boot EFI boot loader.
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boot.loader.systemd-boot.enable = true;
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boot.loader.efi.canTouchEfiVariables = true;
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# Use Zen Kernel
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boot.kernelPackages = pkgs.linuxPackages_zen;
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networking.hostName = "@@hostname@@"; # Define your hostname.
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# networking.wireless.enable = true; # Enables wireless support via wpa_supplicant.
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# Set your time zone.
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time.timeZone = "@@timezone@@";
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# The global useDHCP flag is deprecated, therefore explicitly set to false here.
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networking.useDHCP = false;
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networking.interfaces.enp42s0.useDHCP = true;
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# Select internationalisation properties.
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i18n.defaultLocale = "en_US.UTF-8";
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# Configure X11
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services.xserver = {
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enable = true;
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windowManager.i3 = {
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enable = true;
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package = pkgs.i3-gaps;
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};
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# Set i3 to the default session in the display manager
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displayManager.defaultSession = "none+i3";
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};
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# SSH fix
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programs.ssh.askPassword = pkgs.lib.mkForce "";
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# Enable CUPS to print documents.
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services.printing.enable = true;
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# Enable sound.
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sound.enable = true;
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hardware.pulseaudio.enable = true;
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# Define a user account. Don't forget to set a password with ‘passwd’.
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users.users.username = {
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isNormalUser = true;
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extraGroups = [ "wheel" "libvirtd" ];
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};
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# Disable password for sudo
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security.sudo.extraRules= [{
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groups = [ "wheel" ];
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commands = [{
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command = "ALL" ;
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options= [ "NOPASSWD" ];
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}];
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}];
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# Set ZSH as the default shell
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users.defaultUserShell = pkgs.zsh;
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# clean /tmp on boot
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boot.cleanTmpDir=true;
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# Config packages
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nixpkgs.config = {
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allowUnfree = true;
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chromium = {
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enableWideVine = true;
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};
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};
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# Automatically upgrade the system
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# This service is a modified version of https://github.com/NixOS/nixpkgs/blob/nixos-21.05/nixos/modules/tasks/auto-upgrade.nix#L122
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systemd = {
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services.nixos-upgrade = {
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description = "NixOS Upgrade";
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# We use --upgrade, so we need internet access
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wants = [ "network-online.target" ];
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restartIfChanged = false;
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unitConfig.X-StopOnRemoval = false;
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serviceConfig.Type = "oneshot";
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environment = config.nix.envVars // {
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inherit (config.environment.sessionVariables) NIX_PATH;
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HOME = "/root";
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} // config.networking.proxy.envVars;
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path = with pkgs; [
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coreutils
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gnutar
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xz.bin
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gzip
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gitMinimal
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config.nix.package.out
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];
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script = let
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nixos-rebuild =
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"${config.system.build.nixos-rebuild}/bin/nixos-rebuild";
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in ''
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${nixos-rebuild} boot --upgrade
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booted="$(readlink /run/booted-system/{initrd,kernel,kernel-modules})"
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built="$(readlink /nix/var/nix/profiles/system/{initrd,kernel,kernel-modules})"
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if [ "$booted" = "$built" ]; then
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${nixos-rebuild} switch
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fi
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'';
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};
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# To start the service at boot, we will use a systemd timer
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timers.nixos-upgrade = {
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wantedBy = [ "timers.target" ];
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partOf = [ "nixos-upgrade.service" ];
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timerConfig.OnBootSec = "5s";
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};
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};
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# Some programs need SUID wrappers, can be configured further or are
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# started in user sessions.
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programs.mtr.enable = true;
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programs.gnupg.agent = {
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enable = true;
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enableSSHSupport = true;
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};
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# Enable the OpenSSH daemon.
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services.openssh.enable = true;
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# Open ports in the firewall.
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networking.firewall.enable = false;
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# This value determines the NixOS release from which the default
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# settings for stateful data, like file locations and database versions
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# on your system were taken. It‘s perfectly fine and recommended to leave
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# this value at the release version of the first install of this system.
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# Before changing this value read the documentation for this option
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# (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
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system.stateVersion = "20.09"; # Did you read the comment?
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}
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"""
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def pretty_name():
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return _("NixOS Configuration.")
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def catenate(d, key, *values):
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"""
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Sets @p d[key] to the string-concatenation of @p values
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if none of the values are None.
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This can be used to set keys conditionally based on
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the values being found.
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"""
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if [v for v in values if v is None]:
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return
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d[key] = "".join(values)
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def run():
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"""NixOS Configuration."""
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gs = libcalamares.globalstorage
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text = configuration_nix_sample
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# Collect variables to substitute into the main text
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variables = dict()
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catenate(variables, "hostname", gs.value("hostname"))
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catenate(variables, "timezone", gs.value("locationRegion"), "/", gs.value("locationZone"))
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# Check that all variables are used
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for key in variables.keys():
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pattern = "@@{key}@@".format(key=key)
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if not pattern in text:
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libcalamares.utils.warning("Variable '{key}' is not used.".format(key=key))
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# Check that all patterns exist
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import re
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variable_pattern = re.compile("@@\w+@@")
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for match in variable_pattern.finditer(text):
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variable_name = text[match.start()+2:match.end()-2]
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if not variable_name in variables:
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libcalamares.utils.warning("Variable '{key}' is used but not defined.".format(key=variable_name))
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# Do the substitutions
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for key in variables.keys():
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pattern = "@@{key}@@".format(key=key)
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text = text.replace(pattern, str(variables[key]))
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# Write the result to a temp-file, then run the main tool.
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# There is no progress reporting from the tool, so it's going
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# to seem like the module is hanging (see issue #1740).
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configuration_filename = "/tmp/configuration.nix"
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with open(configuration_filename, "w") as f:
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f.write(text)
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libcalamares.job.setprogress(0.1)
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libcalamares.utils.check_target_env_call(["nix", configuration_filename])
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# To indicate an error, return a tuple of:
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# (message, detailed-error-message)
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return None
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