depot/third_party/nixpkgs/nixos/modules/services/hardware/triggerhappy.nix

145 lines
3.2 KiB
Nix

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