77 lines
1.9 KiB
Nix
77 lines
1.9 KiB
Nix
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{pkgs, config, ...}:
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let
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inherit (builtins) head tail;
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inherit (pkgs.lib) mkOption mkIf filter optionalString any;
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cfg = config.services.xserver.desktopManager;
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needBGCond = d: ! (d ? bgSupport && d.bgSupport);
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in
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{
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require = [
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(import ./kde.nix)
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(import ./gnome.nix)
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(import ./xterm.nix)
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(import ./none.nix)
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];
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services = {
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xserver = {
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displayManager = {
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session = cfg.session.list;
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};
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desktopManager = {
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session = mkOption {
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default = [];
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example = [{
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name = "kde";
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bgSupport = true;
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start = "...";
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}];
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description = "
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Internal option used to add some common line to desktop manager
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scripts before forwarding the value to the
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<varname>displayManager</varname>.
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";
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apply = list: {
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list = map (d: d // {
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manage = "desktop";
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start = d.start
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+ optionalString (needBGCond d) ''
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if test -e $HOME/.background-image; then
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${pkgs.feh}/bin/feh --bg-scale $HOME/.background-image
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fi
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'';
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}) list;
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needBGPackages = [] != filter needBGCond list;
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};
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};
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default = mkOption {
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default = "xterm";
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example = "none";
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description = "
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Default desktop manager loaded if none have been chosen.
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";
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merge = name: list:
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let defaultDM = head list; in
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if tail list != [] then
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throw "Only one default desktop manager is allowed."
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else if any (w: w.name == defaultDM) cfg.session.list then
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defaultDM
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else
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throw "Default desktop manager not found.";
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};
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};
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};
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};
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environment = mkIf cfg.session.needBGPackages {
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extraPackages = [ pkgs.feh ];
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};
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}
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