124 lines
2.9 KiB
Nix
124 lines
2.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.triggerhappy;
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socket = "/run/thd.socket";
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configFile = pkgs.writeText "triggerhappy.conf" ''
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${concatMapStringsSep "\n"
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({ keys, event, cmd, ... }:
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''${concatMapStringsSep "+" (x: "KEY_" + x) keys} ${toString { press = 1; hold = 2; release = 0; }.${event}} ${cmd}''
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)
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cfg.bindings}
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${cfg.extraConfig}
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'';
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bindingCfg = { ... }: {
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options = {
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keys = mkOption {
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type = types.listOf types.str;
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description = "List of keys to match. Key names as defined in linux/input-event-codes.h";
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};
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event = mkOption {
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type = types.enum ["press" "hold" "release"];
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default = "press";
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description = "Event to match.";
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};
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cmd = mkOption {
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type = types.str;
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description = "What to run.";
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};
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};
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};
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in
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{
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###### interface
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options = {
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services.triggerhappy = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable the <command>triggerhappy</command> hotkey daemon.
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'';
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};
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user = mkOption {
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type = types.str;
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default = "nobody";
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example = "root";
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description = ''
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User account under which <command>triggerhappy</command> runs.
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'';
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};
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bindings = mkOption {
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type = types.listOf (types.submodule bindingCfg);
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default = [];
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example = lib.literalExample ''
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[ { keys = ["PLAYPAUSE"]; cmd = "''${pkgs.mpc_cli}/bin/mpc -q toggle"; } ]
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'';
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description = ''
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Key bindings for <command>triggerhappy</command>.
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'';
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};
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Literal contents to append to the end of <command>triggerhappy</command> configuration file.
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'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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systemd.sockets.triggerhappy = {
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description = "Triggerhappy Socket";
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wantedBy = [ "sockets.target" ];
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socketConfig.ListenDatagram = socket;
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};
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systemd.services.triggerhappy = {
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wantedBy = [ "multi-user.target" ];
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after = [ "local-fs.target" ];
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description = "Global hotkey daemon";
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serviceConfig = {
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ExecStart = "${pkgs.triggerhappy}/bin/thd ${optionalString (cfg.user != "root") "--user ${cfg.user}"} --socket ${socket} --triggers ${configFile} --deviceglob /dev/input/event*";
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};
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};
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services.udev.packages = lib.singleton (pkgs.writeTextFile {
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name = "triggerhappy-udev-rules";
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destination = "/etc/udev/rules.d/61-triggerhappy.rules";
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text = ''
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ACTION=="add", SUBSYSTEM=="input", KERNEL=="event[0-9]*", ATTRS{name}!="triggerhappy", \
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RUN+="${pkgs.triggerhappy}/bin/th-cmd --socket ${socket} --passfd --udev"
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'';
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});
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};
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}
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