328 lines
11 KiB
Nix
328 lines
11 KiB
Nix
{ config, lib, pkgs, ... }:
|
||
|
||
with lib;
|
||
|
||
let
|
||
|
||
cfg = config.services.xserver.displayManager;
|
||
gdm = pkgs.gnome.gdm;
|
||
settingsFormat = pkgs.formats.ini { };
|
||
configFile = settingsFormat.generate "custom.conf" cfg.gdm.settings;
|
||
|
||
xSessionWrapper = if (cfg.setupCommands == "") then null else
|
||
pkgs.writeScript "gdm-x-session-wrapper" ''
|
||
#!${pkgs.bash}/bin/bash
|
||
${cfg.setupCommands}
|
||
exec "$@"
|
||
'';
|
||
|
||
# Solves problems like:
|
||
# https://wiki.archlinux.org/index.php/Talk:Bluetooth_headset#GDMs_pulseaudio_instance_captures_bluetooth_headset
|
||
# Instead of blacklisting plugins, we use Fedora's PulseAudio configuration for GDM:
|
||
# https://src.fedoraproject.org/rpms/gdm/blob/master/f/default.pa-for-gdm
|
||
pulseConfig = pkgs.writeText "default.pa" ''
|
||
load-module module-device-restore
|
||
load-module module-card-restore
|
||
load-module module-udev-detect
|
||
load-module module-native-protocol-unix
|
||
load-module module-default-device-restore
|
||
load-module module-always-sink
|
||
load-module module-intended-roles
|
||
load-module module-suspend-on-idle
|
||
load-module module-position-event-sounds
|
||
'';
|
||
|
||
defaultSessionName = config.services.displayManager.defaultSession;
|
||
|
||
setSessionScript = pkgs.callPackage ./account-service-util.nix { };
|
||
in
|
||
|
||
{
|
||
imports = [
|
||
(mkRenamedOptionModule [ "services" "xserver" "displayManager" "gdm" "autoLogin" "enable" ] [
|
||
"services"
|
||
"displayManager"
|
||
"autoLogin"
|
||
"enable"
|
||
])
|
||
(mkRenamedOptionModule [ "services" "xserver" "displayManager" "gdm" "autoLogin" "user" ] [
|
||
"services"
|
||
"displayManager"
|
||
"autoLogin"
|
||
"user"
|
||
])
|
||
|
||
(mkRemovedOptionModule [ "services" "xserver" "displayManager" "gdm" "nvidiaWayland" ] "We defer to GDM whether Wayland should be enabled.")
|
||
];
|
||
|
||
meta = {
|
||
maintainers = teams.gnome.members;
|
||
};
|
||
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
services.xserver.displayManager.gdm = {
|
||
|
||
enable = mkEnableOption "GDM, the GNOME Display Manager";
|
||
|
||
debug = mkEnableOption "debugging messages in GDM";
|
||
|
||
# Auto login options specific to GDM
|
||
autoLogin.delay = mkOption {
|
||
type = types.int;
|
||
default = 0;
|
||
description = ''
|
||
Seconds of inactivity after which the autologin will be performed.
|
||
'';
|
||
};
|
||
|
||
wayland = mkOption {
|
||
type = types.bool;
|
||
default = true;
|
||
description = ''
|
||
Allow GDM to run on Wayland instead of Xserver.
|
||
'';
|
||
};
|
||
|
||
autoSuspend = mkOption {
|
||
default = true;
|
||
description = ''
|
||
On the GNOME Display Manager login screen, suspend the machine after inactivity.
|
||
(Does not affect automatic suspend while logged in, or at lock screen.)
|
||
'';
|
||
type = types.bool;
|
||
};
|
||
|
||
banner = mkOption {
|
||
type = types.nullOr types.lines;
|
||
default = null;
|
||
example = ''
|
||
foo
|
||
bar
|
||
baz
|
||
'';
|
||
description = ''
|
||
Optional message to display on the login screen.
|
||
'';
|
||
};
|
||
|
||
settings = mkOption {
|
||
type = settingsFormat.type;
|
||
default = { };
|
||
example = {
|
||
debug.enable = true;
|
||
};
|
||
description = ''
|
||
Options passed to the gdm daemon.
|
||
See [here](https://help.gnome.org/admin/gdm/stable/configuration.html.en#daemonconfig) for supported options.
|
||
'';
|
||
};
|
||
|
||
};
|
||
|
||
};
|
||
|
||
|
||
###### implementation
|
||
|
||
config = mkIf cfg.gdm.enable {
|
||
|
||
services.xserver.displayManager.lightdm.enable = false;
|
||
|
||
users.users.gdm =
|
||
{ name = "gdm";
|
||
uid = config.ids.uids.gdm;
|
||
group = "gdm";
|
||
home = "/run/gdm";
|
||
description = "GDM user";
|
||
};
|
||
|
||
users.groups.gdm.gid = config.ids.gids.gdm;
|
||
|
||
# GDM needs different xserverArgs, presumable because using wayland by default.
|
||
services.xserver.tty = null;
|
||
services.xserver.display = null;
|
||
services.xserver.verbose = null;
|
||
|
||
services.displayManager =
|
||
{
|
||
environment = {
|
||
GDM_X_SERVER_EXTRA_ARGS = toString
|
||
(filter (arg: arg != "-terminate") cfg.xserverArgs);
|
||
XDG_DATA_DIRS = lib.makeSearchPath "share" [
|
||
gdm # for gnome-login.session
|
||
config.services.displayManager.sessionData.desktops
|
||
pkgs.gnome.gnome-control-center # for accessibility icon
|
||
pkgs.gnome.adwaita-icon-theme
|
||
pkgs.hicolor-icon-theme # empty icon theme as a base
|
||
];
|
||
} // optionalAttrs (xSessionWrapper != null) {
|
||
# Make GDM use this wrapper before running the session, which runs the
|
||
# configured setupCommands. This relies on a patched GDM which supports
|
||
# this environment variable.
|
||
GDM_X_SESSION_WRAPPER = "${xSessionWrapper}";
|
||
};
|
||
execCmd = "exec ${gdm}/bin/gdm";
|
||
preStart = optionalString (defaultSessionName != null) ''
|
||
# Set default session in session chooser to a specified values – basically ignore session history.
|
||
${setSessionScript}/bin/set-session ${config.services.displayManager.sessionData.autologinSession}
|
||
'';
|
||
};
|
||
|
||
systemd.tmpfiles.rules = [
|
||
"d /run/gdm/.config 0711 gdm gdm"
|
||
] ++ optionals config.hardware.pulseaudio.enable [
|
||
"d /run/gdm/.config/pulse 0711 gdm gdm"
|
||
"L+ /run/gdm/.config/pulse/${pulseConfig.name} - - - - ${pulseConfig}"
|
||
] ++ optionals config.services.gnome.gnome-initial-setup.enable [
|
||
# Create stamp file for gnome-initial-setup to prevent it starting in GDM.
|
||
"f /run/gdm/.config/gnome-initial-setup-done 0711 gdm gdm - yes"
|
||
];
|
||
|
||
# Otherwise GDM will not be able to start correctly and display Wayland sessions
|
||
systemd.packages = with pkgs.gnome; [ gdm gnome-session gnome-shell ];
|
||
environment.systemPackages = [ pkgs.gnome.adwaita-icon-theme ];
|
||
|
||
# We dont use the upstream gdm service
|
||
# it has to be disabled since the gdm package has it
|
||
# https://github.com/NixOS/nixpkgs/issues/108672
|
||
systemd.services.gdm.enable = false;
|
||
|
||
systemd.services.display-manager.wants = [
|
||
# Because sd_login_monitor_new requires /run/systemd/machines
|
||
"systemd-machined.service"
|
||
# setSessionScript wants AccountsService
|
||
"accounts-daemon.service"
|
||
];
|
||
|
||
systemd.services.display-manager.after = [
|
||
"rc-local.service"
|
||
"systemd-machined.service"
|
||
"systemd-user-sessions.service"
|
||
"getty@tty${gdm.initialVT}.service"
|
||
"plymouth-quit.service"
|
||
"plymouth-start.service"
|
||
];
|
||
systemd.services.display-manager.conflicts = [
|
||
"getty@tty${gdm.initialVT}.service"
|
||
"plymouth-quit.service"
|
||
];
|
||
systemd.services.display-manager.onFailure = [
|
||
"plymouth-quit.service"
|
||
];
|
||
|
||
# Prevent nixos-rebuild switch from bringing down the graphical
|
||
# session. (If multi-user.target wants plymouth-quit.service which
|
||
# conflicts display-manager.service, then when nixos-rebuild
|
||
# switch starts multi-user.target, display-manager.service is
|
||
# stopped so plymouth-quit.service can be started.)
|
||
systemd.services.plymouth-quit = mkIf config.boot.plymouth.enable {
|
||
wantedBy = lib.mkForce [];
|
||
};
|
||
|
||
systemd.services.display-manager.serviceConfig = {
|
||
# Restart = "always"; - already defined in xserver.nix
|
||
KillMode = "mixed";
|
||
IgnoreSIGPIPE = "no";
|
||
BusName = "org.gnome.DisplayManager";
|
||
StandardError = "inherit";
|
||
ExecReload = "${pkgs.coreutils}/bin/kill -SIGHUP $MAINPID";
|
||
KeyringMode = "shared";
|
||
EnvironmentFile = "-/etc/locale.conf";
|
||
};
|
||
|
||
systemd.services.display-manager.path = [ pkgs.gnome.gnome-session ];
|
||
|
||
# Allow choosing an user account
|
||
services.accounts-daemon.enable = true;
|
||
|
||
services.dbus.packages = [ gdm ];
|
||
|
||
systemd.user.services.dbus.wantedBy = [ "default.target" ];
|
||
|
||
programs.dconf.profiles.gdm.databases = lib.optionals (!cfg.gdm.autoSuspend) [{
|
||
settings."org/gnome/settings-daemon/plugins/power" = {
|
||
sleep-inactive-ac-type = "nothing";
|
||
sleep-inactive-battery-type = "nothing";
|
||
sleep-inactive-ac-timeout = lib.gvariant.mkInt32 0;
|
||
sleep-inactive-battery-timeout = lib.gvariant.mkInt32 0;
|
||
};
|
||
}] ++ lib.optionals (cfg.gdm.banner != null) [{
|
||
settings."org/gnome/login-screen" = {
|
||
banner-message-enable = true;
|
||
banner-message-text = cfg.gdm.banner;
|
||
};
|
||
}] ++ [ "${gdm}/share/gdm/greeter-dconf-defaults" ];
|
||
|
||
# Use AutomaticLogin if delay is zero, because it's immediate.
|
||
# Otherwise with TimedLogin with zero seconds the prompt is still
|
||
# presented and there's a little delay.
|
||
services.xserver.displayManager.gdm.settings = {
|
||
daemon = mkMerge [
|
||
{ WaylandEnable = cfg.gdm.wayland; }
|
||
# nested if else didn't work
|
||
(mkIf (config.services.displayManager.autoLogin.enable && cfg.gdm.autoLogin.delay != 0 ) {
|
||
TimedLoginEnable = true;
|
||
TimedLogin = config.services.displayManager.autoLogin.user;
|
||
TimedLoginDelay = cfg.gdm.autoLogin.delay;
|
||
})
|
||
(mkIf (config.services.displayManager.autoLogin.enable && cfg.gdm.autoLogin.delay == 0 ) {
|
||
AutomaticLoginEnable = true;
|
||
AutomaticLogin = config.services.displayManager.autoLogin.user;
|
||
})
|
||
];
|
||
debug = mkIf cfg.gdm.debug {
|
||
Enable = true;
|
||
};
|
||
};
|
||
|
||
environment.etc."gdm/custom.conf".source = configFile;
|
||
|
||
environment.etc."gdm/Xsession".source = config.services.displayManager.sessionData.wrapper;
|
||
|
||
# GDM LFS PAM modules, adapted somehow to NixOS
|
||
security.pam.services = {
|
||
gdm-launch-environment.text = ''
|
||
auth required pam_succeed_if.so audit quiet_success user = gdm
|
||
auth optional pam_permit.so
|
||
|
||
account required pam_succeed_if.so audit quiet_success user = gdm
|
||
account sufficient pam_unix.so
|
||
|
||
password required pam_deny.so
|
||
|
||
session required pam_succeed_if.so audit quiet_success user = gdm
|
||
session required pam_env.so conffile=/etc/pam/environment readenv=0
|
||
session optional ${config.systemd.package}/lib/security/pam_systemd.so
|
||
session optional pam_keyinit.so force revoke
|
||
session optional pam_permit.so
|
||
'';
|
||
|
||
gdm-password.text = ''
|
||
auth substack login
|
||
account include login
|
||
password substack login
|
||
session include login
|
||
'';
|
||
|
||
gdm-autologin.text = ''
|
||
auth requisite pam_nologin.so
|
||
|
||
auth required pam_succeed_if.so uid >= 1000 quiet
|
||
auth required pam_permit.so
|
||
|
||
account sufficient pam_unix.so
|
||
|
||
password requisite pam_unix.so nullok yescrypt
|
||
|
||
session optional pam_keyinit.so revoke
|
||
session include login
|
||
'';
|
||
|
||
};
|
||
|
||
};
|
||
|
||
}
|