117 lines
3.9 KiB
Nix
117 lines
3.9 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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inherit (lib) mapAttrs mkIf mkOption optional optionals types;
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cfg = config.services.kmscon;
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autologinArg = lib.optionalString (cfg.autologinUser != null) "-f ${cfg.autologinUser}";
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configDir = pkgs.writeTextFile { name = "kmscon-config"; destination = "/kmscon.conf"; text = cfg.extraConfig; };
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in {
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options = {
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services.kmscon = {
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enable = mkOption {
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description = ''
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Use kmscon as the virtual console instead of gettys.
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kmscon is a kms/dri-based userspace virtual terminal implementation.
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It supports a richer feature set than the standard linux console VT,
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including full unicode support, and when the video card supports drm
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should be much faster.
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'';
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type = types.bool;
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default = false;
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};
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hwRender = mkOption {
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description = "Whether to use 3D hardware acceleration to render the console.";
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type = types.bool;
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default = false;
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};
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fonts = mkOption {
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description = "Fonts used by kmscon, in order of priority.";
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default = null;
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example = lib.literalExpression ''[ { name = "Source Code Pro"; package = pkgs.source-code-pro; } ]'';
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type = with types;
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let fontType = submodule {
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options = {
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name = mkOption { type = str; description = "Font name, as used by fontconfig."; };
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package = mkOption { type = package; description = "Package providing the font."; };
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};
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}; in nullOr (nonEmptyListOf fontType);
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};
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extraConfig = mkOption {
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description = "Extra contents of the kmscon.conf file.";
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type = types.lines;
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default = "";
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example = "font-size=14";
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};
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extraOptions = mkOption {
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description = "Extra flags to pass to kmscon.";
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type = types.separatedString " ";
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default = "";
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example = "--term xterm-256color";
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};
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autologinUser = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Username of the account that will be automatically logged in at the console.
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If unspecified, a login prompt is shown as usual.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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# Largely copied from unit provided with kmscon source
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systemd.units."kmsconvt@.service".text = ''
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[Unit]
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Description=KMS System Console on %I
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Documentation=man:kmscon(1)
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After=systemd-user-sessions.service
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After=plymouth-quit-wait.service
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After=systemd-logind.service
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After=systemd-vconsole-setup.service
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Requires=systemd-logind.service
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Before=getty.target
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Conflicts=getty@%i.service
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OnFailure=getty@%i.service
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IgnoreOnIsolate=yes
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ConditionPathExists=/dev/tty0
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[Service]
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ExecStart=
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ExecStart=${pkgs.kmscon}/bin/kmscon "--vt=%I" ${cfg.extraOptions} --seats=seat0 --no-switchvt --configdir ${configDir} --login -- ${pkgs.shadow}/bin/login -p ${autologinArg}
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UtmpIdentifier=%I
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TTYPath=/dev/%I
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TTYReset=yes
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TTYVHangup=yes
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TTYVTDisallocate=yes
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X-RestartIfChanged=false
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'';
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systemd.suppressedSystemUnits = [ "autovt@.service" ];
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systemd.units."kmsconvt@.service".aliases = [ "autovt@.service" ];
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systemd.services.systemd-vconsole-setup.enable = false;
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systemd.services.reload-systemd-vconsole-setup.enable = false;
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services.kmscon.extraConfig =
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let
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render = optionals cfg.hwRender [ "drm" "hwaccel" ];
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fonts = optional (cfg.fonts != null) "font-name=${lib.concatMapStringsSep ", " (f: f.name) cfg.fonts}";
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in lib.concatStringsSep "\n" (render ++ fonts);
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hardware.graphics.enable = mkIf cfg.hwRender true;
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fonts = mkIf (cfg.fonts != null) {
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fontconfig.enable = true;
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packages = map (f: f.package) cfg.fonts;
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};
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};
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}
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