155 lines
3.7 KiB
Nix
155 lines
3.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.acpid;
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canonicalHandlers = {
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powerEvent = {
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event = "button/power.*";
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action = cfg.powerEventCommands;
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};
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lidEvent = {
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event = "button/lid.*";
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action = cfg.lidEventCommands;
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};
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acEvent = {
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event = "ac_adapter.*";
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action = cfg.acEventCommands;
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};
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};
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acpiConfDir = pkgs.runCommand "acpi-events" { preferLocalBuild = true; }
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''
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mkdir -p $out
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${
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# Generate a configuration file for each event. (You can't have
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# multiple events in one config file...)
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let f = name: handler:
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''
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fn=$out/${name}
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echo "event=${handler.event}" > $fn
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echo "action=${pkgs.writeShellScriptBin "${name}.sh" handler.action }/bin/${name}.sh '%e'" >> $fn
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'';
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in concatStringsSep "\n" (mapAttrsToList f (canonicalHandlers // cfg.handlers))
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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.acpid = {
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enable = mkEnableOption (lib.mdDoc "the ACPI daemon");
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logEvents = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc "Log all event activity.";
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};
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handlers = mkOption {
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type = types.attrsOf (types.submodule {
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options = {
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event = mkOption {
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type = types.str;
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example = literalExpression ''"button/power.*" "button/lid.*" "ac_adapter.*" "button/mute.*" "button/volumedown.*" "cd/play.*" "cd/next.*"'';
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description = lib.mdDoc "Event type.";
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};
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action = mkOption {
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type = types.lines;
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description = lib.mdDoc "Shell commands to execute when the event is triggered.";
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};
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};
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});
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description = lib.mdDoc ''
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Event handlers.
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::: {.note}
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Handler can be a single command.
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:::
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'';
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default = {};
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example = {
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ac-power = {
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event = "ac_adapter/*";
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action = ''
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vals=($1) # space separated string to array of multiple values
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case ''${vals[3]} in
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00000000)
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echo unplugged >> /tmp/acpi.log
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;;
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00000001)
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echo plugged in >> /tmp/acpi.log
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;;
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*)
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echo unknown >> /tmp/acpi.log
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;;
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esac
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'';
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};
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};
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};
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powerEventCommands = mkOption {
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type = types.lines;
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default = "";
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description = lib.mdDoc "Shell commands to execute on a button/power.* event.";
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};
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lidEventCommands = mkOption {
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type = types.lines;
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default = "";
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description = lib.mdDoc "Shell commands to execute on a button/lid.* event.";
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};
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acEventCommands = mkOption {
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type = types.lines;
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default = "";
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description = lib.mdDoc "Shell commands to execute on an ac_adapter.* event.";
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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.services.acpid = {
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description = "ACPI Daemon";
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documentation = [ "man:acpid(8)" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = escapeShellArgs
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([ "${pkgs.acpid}/bin/acpid"
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"--foreground"
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"--netlink"
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"--confdir" "${acpiConfDir}"
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] ++ optional cfg.logEvents "--logevents"
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);
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};
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unitConfig = {
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ConditionVirtualization = "!systemd-nspawn";
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ConditionPathExists = [ "/proc/acpi" ];
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};
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};
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};
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}
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