365 lines
12 KiB
Nix
365 lines
12 KiB
Nix
# This module declares the options to define a *display manager*, the
|
|
# program responsible for handling X logins (such as xdm, gdb, or
|
|
# SLiM). The display manager allows the user to select a *session
|
|
# type*. When the user logs in, the display manager starts the
|
|
# *session script* ("xsession" below) to launch the selected session
|
|
# type. The session type defines two things: the *desktop manager*
|
|
# (e.g., KDE, Gnome or a plain xterm), and optionally the *window
|
|
# manager* (e.g. kwin or twm).
|
|
|
|
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
cfg = config.services.xserver;
|
|
xorg = pkgs.xorg;
|
|
|
|
fontconfig = config.fonts.fontconfig;
|
|
xresourcesXft = pkgs.writeText "Xresources-Xft" ''
|
|
${optionalString (fontconfig.dpi != 0) ''Xft.dpi: ${toString fontconfig.dpi}''}
|
|
Xft.antialias: ${if fontconfig.antialias then "1" else "0"}
|
|
Xft.rgba: ${fontconfig.subpixel.rgba}
|
|
Xft.lcdfilter: lcd${fontconfig.subpixel.lcdfilter}
|
|
Xft.hinting: ${if fontconfig.hinting.enable then "1" else "0"}
|
|
Xft.autohint: ${if fontconfig.hinting.autohint then "1" else "0"}
|
|
Xft.hintstyle: hintslight
|
|
'';
|
|
|
|
mkCases = session:
|
|
concatStrings (
|
|
mapAttrsToList (name: starts: ''
|
|
(${name})
|
|
${concatMapStringsSep "\n " (n: n.start) starts}
|
|
;;
|
|
'') (lib.groupBy (n: n.name) session)
|
|
);
|
|
|
|
# file provided by services.xserver.displayManager.session.wrapper
|
|
xsessionWrapper = pkgs.writeScript "xsession-wrapper"
|
|
''
|
|
#! ${pkgs.bash}/bin/bash
|
|
|
|
# Shared environment setup for graphical sessions.
|
|
|
|
. /etc/profile
|
|
cd "$HOME"
|
|
|
|
${optionalString cfg.startDbusSession ''
|
|
if test -z "$DBUS_SESSION_BUS_ADDRESS"; then
|
|
exec ${pkgs.dbus.dbus-launch} --exit-with-session "$0" "$@"
|
|
fi
|
|
''}
|
|
|
|
${optionalString cfg.displayManager.job.logToJournal ''
|
|
if [ -z "$_DID_SYSTEMD_CAT" ]; then
|
|
export _DID_SYSTEMD_CAT=1
|
|
exec ${config.systemd.package}/bin/systemd-cat -t xsession "$0" "$@"
|
|
fi
|
|
''}
|
|
|
|
${optionalString cfg.displayManager.job.logToFile ''
|
|
exec &> >(tee ~/.xsession-errors)
|
|
''}
|
|
|
|
# Start PulseAudio if enabled.
|
|
${optionalString (config.hardware.pulseaudio.enable) ''
|
|
# Publish access credentials in the root window.
|
|
if ${config.hardware.pulseaudio.package.out}/bin/pulseaudio --dump-modules | grep module-x11-publish &> /dev/null; then
|
|
${config.hardware.pulseaudio.package.out}/bin/pactl load-module module-x11-publish "display=$DISPLAY"
|
|
fi
|
|
''}
|
|
|
|
# Tell systemd about our $DISPLAY and $XAUTHORITY.
|
|
# This is needed by the ssh-agent unit.
|
|
#
|
|
# Also tell systemd about the dbus session bus address.
|
|
# This is required by user units using the session bus.
|
|
${config.systemd.package}/bin/systemctl --user import-environment DISPLAY XAUTHORITY DBUS_SESSION_BUS_ADDRESS
|
|
|
|
# Load X defaults.
|
|
# FIXME: Check XDG_SESSION_TYPE against x11
|
|
${xorg.xrdb}/bin/xrdb -merge ${xresourcesXft}
|
|
if test -e ~/.Xresources; then
|
|
${xorg.xrdb}/bin/xrdb -merge ~/.Xresources
|
|
elif test -e ~/.Xdefaults; then
|
|
${xorg.xrdb}/bin/xrdb -merge ~/.Xdefaults
|
|
fi
|
|
|
|
# Speed up application start by 50-150ms according to
|
|
# http://kdemonkey.blogspot.nl/2008/04/magic-trick.html
|
|
rm -rf "$HOME/.compose-cache"
|
|
mkdir "$HOME/.compose-cache"
|
|
|
|
# Work around KDE errors when a user first logs in and
|
|
# .local/share doesn't exist yet.
|
|
mkdir -p "$HOME/.local/share"
|
|
|
|
unset _DID_SYSTEMD_CAT
|
|
|
|
${cfg.displayManager.sessionCommands}
|
|
|
|
# Allow the user to execute commands at the beginning of the X session.
|
|
if test -f ~/.xprofile; then
|
|
source ~/.xprofile
|
|
fi
|
|
|
|
# Start systemd user services for graphical sessions
|
|
${config.systemd.package}/bin/systemctl --user start graphical-session.target
|
|
|
|
# Allow the user to setup a custom session type.
|
|
if test -x ~/.xsession; then
|
|
exec ~/.xsession
|
|
fi
|
|
|
|
if test "$1"; then
|
|
# Run the supplied session command. Remove any double quotes with eval.
|
|
eval exec "$@"
|
|
else
|
|
# Fall back to the default window/desktopManager
|
|
exec ${cfg.displayManager.session.script}
|
|
fi
|
|
'';
|
|
|
|
# file provided by services.xserver.displayManager.session.script
|
|
xsession = wm: dm: pkgs.writeScript "xsession"
|
|
''
|
|
#! ${pkgs.bash}/bin/bash
|
|
|
|
# Legacy session script used to construct .desktop files from
|
|
# `services.xserver.displayManager.session` entries. Called from
|
|
# `sessionWrapper`.
|
|
|
|
# Expected parameters:
|
|
# $1 = <desktop-manager>+<window-manager>
|
|
|
|
# The first argument of this script is the session type.
|
|
sessionType="$1"
|
|
if [ "$sessionType" = default ]; then sessionType=""; fi
|
|
|
|
# The session type is "<desktop-manager>+<window-manager>", so
|
|
# extract those (see:
|
|
# http://wiki.bash-hackers.org/syntax/pe#substring_removal).
|
|
windowManager="''${sessionType##*+}"
|
|
: ''${windowManager:=${cfg.windowManager.default}}
|
|
desktopManager="''${sessionType%%+*}"
|
|
: ''${desktopManager:=${cfg.desktopManager.default}}
|
|
|
|
# Start the window manager.
|
|
case "$windowManager" in
|
|
${mkCases wm}
|
|
(*) echo "$0: Window manager '$windowManager' not found.";;
|
|
esac
|
|
|
|
# Start the desktop manager.
|
|
case "$desktopManager" in
|
|
${mkCases dm}
|
|
(*) echo "$0: Desktop manager '$desktopManager' not found.";;
|
|
esac
|
|
|
|
${optionalString cfg.updateDbusEnvironment ''
|
|
${lib.getBin pkgs.dbus}/bin/dbus-update-activation-environment --systemd --all
|
|
''}
|
|
|
|
test -n "$waitPID" && wait "$waitPID"
|
|
|
|
${config.systemd.package}/bin/systemctl --user stop graphical-session.target
|
|
|
|
exit 0
|
|
'';
|
|
|
|
# Desktop Entry Specification:
|
|
# - https://standards.freedesktop.org/desktop-entry-spec/latest/
|
|
# - https://standards.freedesktop.org/desktop-entry-spec/latest/ar01s06.html
|
|
mkDesktops = names: pkgs.runCommand "desktops"
|
|
{ # trivial derivation
|
|
preferLocalBuild = true;
|
|
allowSubstitutes = false;
|
|
}
|
|
''
|
|
mkdir -p "$out/share/xsessions"
|
|
${concatMapStrings (n: ''
|
|
cat - > "$out/share/xsessions/${n}.desktop" << EODESKTOP
|
|
[Desktop Entry]
|
|
Version=1.0
|
|
Type=XSession
|
|
TryExec=${cfg.displayManager.session.script}
|
|
Exec=${cfg.displayManager.session.script} "${n}"
|
|
Name=${n}
|
|
Comment=
|
|
EODESKTOP
|
|
'') names}
|
|
|
|
${concatMapStrings (pkg: ''
|
|
${xorg.lndir}/bin/lndir ${pkg}/share/xsessions $out/share/xsessions
|
|
'') cfg.displayManager.extraSessionFilePackages}
|
|
'';
|
|
|
|
in
|
|
|
|
{
|
|
|
|
options = {
|
|
|
|
services.xserver.displayManager = {
|
|
|
|
xauthBin = mkOption {
|
|
internal = true;
|
|
default = "${xorg.xauth}/bin/xauth";
|
|
description = "Path to the <command>xauth</command> program used by display managers.";
|
|
};
|
|
|
|
xserverBin = mkOption {
|
|
type = types.path;
|
|
description = "Path to the X server used by display managers.";
|
|
};
|
|
|
|
xserverArgs = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [];
|
|
example = [ "-ac" "-logverbose" "-verbose" "-nolisten tcp" ];
|
|
description = "List of arguments for the X server.";
|
|
};
|
|
|
|
setupCommands = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
description = ''
|
|
Shell commands executed just after the X server has started.
|
|
|
|
This option is only effective for display managers for which this feature
|
|
is supported; currently these are LightDM, GDM and SDDM.
|
|
'';
|
|
};
|
|
|
|
sessionCommands = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example =
|
|
''
|
|
xmessage "Hello World!" &
|
|
'';
|
|
description = "Shell commands executed just before the window or desktop manager is started.";
|
|
};
|
|
|
|
hiddenUsers = mkOption {
|
|
type = types.listOf types.str;
|
|
default = [ "nobody" ];
|
|
description = ''
|
|
A list of users which will not be shown in the display manager.
|
|
'';
|
|
};
|
|
|
|
extraSessionFilePackages = mkOption {
|
|
type = types.listOf types.package;
|
|
default = [];
|
|
description = ''
|
|
A list of packages containing xsession files to be passed to the display manager.
|
|
'';
|
|
};
|
|
|
|
session = mkOption {
|
|
default = [];
|
|
example = literalExample
|
|
''
|
|
[ { manage = "desktop";
|
|
name = "xterm";
|
|
start = '''
|
|
''${pkgs.xterm}/bin/xterm -ls &
|
|
waitPID=$!
|
|
''';
|
|
}
|
|
]
|
|
'';
|
|
description = ''
|
|
List of sessions supported with the command used to start each
|
|
session. Each session script can set the
|
|
<varname>waitPID</varname> shell variable to make this script
|
|
wait until the end of the user session. Each script is used
|
|
to define either a window manager or a desktop manager. These
|
|
can be differentiated by setting the attribute
|
|
<varname>manage</varname> either to <literal>"window"</literal>
|
|
or <literal>"desktop"</literal>.
|
|
|
|
The list of desktop manager and window manager should appear
|
|
inside the display manager with the desktop manager name
|
|
followed by the window manager name.
|
|
'';
|
|
apply = list: rec {
|
|
wm = filter (s: s.manage == "window") list;
|
|
dm = filter (s: s.manage == "desktop") list;
|
|
names = flip concatMap dm
|
|
(d: map (w: d.name + optionalString (w.name != "none") ("+" + w.name))
|
|
(filter (w: d.name != "none" || w.name != "none") wm));
|
|
desktops = mkDesktops names;
|
|
script = xsession wm dm;
|
|
wrapper = xsessionWrapper;
|
|
};
|
|
};
|
|
|
|
job = {
|
|
|
|
preStart = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example = "rm -f /var/log/my-display-manager.log";
|
|
description = "Script executed before the display manager is started.";
|
|
};
|
|
|
|
execCmd = mkOption {
|
|
type = types.str;
|
|
example = literalExample ''
|
|
"''${pkgs.slim}/bin/slim"
|
|
'';
|
|
description = "Command to start the display manager.";
|
|
};
|
|
|
|
environment = mkOption {
|
|
type = types.attrsOf types.unspecified;
|
|
default = {};
|
|
example = { SLIM_CFGFILE = "/etc/slim.conf"; };
|
|
description = "Additional environment variables needed by the display manager.";
|
|
};
|
|
|
|
logToFile = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Whether the display manager redirects the output of the
|
|
session script to <filename>~/.xsession-errors</filename>.
|
|
'';
|
|
};
|
|
|
|
logToJournal = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Whether the display manager redirects the output of the
|
|
session script to the systemd journal.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
|
|
config = {
|
|
services.xserver.displayManager.xserverBin = "${xorg.xorgserver.out}/bin/X";
|
|
|
|
systemd.user.targets.graphical-session = {
|
|
unitConfig = {
|
|
RefuseManualStart = false;
|
|
StopWhenUnneeded = false;
|
|
};
|
|
};
|
|
};
|
|
|
|
imports = [
|
|
(mkRemovedOptionModule [ "services" "xserver" "displayManager" "desktopManagerHandlesLidAndPower" ]
|
|
"The option is no longer necessary because all display managers have already delegated lid management to systemd.")
|
|
];
|
|
|
|
}
|