nixpkgs/modules/services/x11/desktop-managers/default.nix
Nicolas Pierron 36573e5e5c Convert module which are declaring options into modules separated with an
"options" set to declare options and a "config" set to define options.

svn path=/nixos/trunk/; revision=17148
2009-09-15 08:33:45 +00:00

75 lines
1.8 KiB
Nix

{pkgs, config, ...}:
let
inherit (pkgs.lib) mkOption mergeOneOption mkIf filter optionalString any;
xcfg = config.services.xserver;
cfg = xcfg.desktopManager;
# Whether desktop manager `d' is capable of setting a background.
# If it isn't, the `feh' program is used as a fallback.
needBGCond = d: ! (d ? bgSupport && d.bgSupport);
in
{
imports = [
./kde.nix
./kde4.nix
./gnome.nix
./xterm.nix
./none.nix
];
options = {
services.xserver.desktopManager = {
session = mkOption {
default = [];
example = [{
name = "kde";
bgSupport = true;
start = "...";
}];
description = "
Internal option used to add some common line to desktop manager
scripts before forwarding the value to the
<varname>displayManager</varname>.
";
apply = list: {
list = map (d: d // {
manage = "desktop";
start = d.start
+ optionalString (needBGCond d) ''
if test -e $HOME/.background-image; then
${pkgs.feh}/bin/feh --bg-scale $HOME/.background-image
fi
'';
}) list;
needBGPackages = [] != filter needBGCond list;
};
};
default = mkOption {
default = "xterm";
example = "none";
description = "
Default desktop manager loaded if none have been chosen.
";
merge = mergeOneOption;
apply = defaultDM:
if any (w: w.name == defaultDM) cfg.session.list then
defaultDM
else
throw "Default desktop manager ($(defaultDM)) not found.";
};
};
};
config = {
services.xserver.displayManager.session = cfg.session.list;
environment.x11Packages =
mkIf cfg.session.needBGPackages [ pkgs.feh ];
};
}