The latest release of libyamlcpp in nixpkgs does not build because it uses an older version of boost than the one in nixpkgs and therefore expects a particular header file which does not exist in the latest boost anymore. For this reason, a later (git) version of libyamlcpp is used here (which actually doesn't even require boost). The substituteInPlace in the prePatch phase is needed because libevdev places its headers in non-standard places, meaning Nix cannot normally find them. The `cut` command removes the first two "-I" characters from the output of `pkg-config`. This needs to be in the prePatch phase because otherwise Nix will patch these lines to `/var/empty`, meaning you would have less specific replacement (in case other lines are also patched to `/var/empty`). I wrote the patch. (I believe it is NixOS specific.)
		
			
				
	
	
		
			62 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			62 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ config, lib, pkgs, ... }:
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with lib;
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let
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  cfg = config.services.interception-tools;
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in {
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  options.services.interception-tools = {
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    enable = mkOption {
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      type = types.bool;
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      default = false;
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      description = "Whether to enable the interception tools service.";
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    };
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    plugins = mkOption {
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      type = types.listOf types.package;
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      default = [ pkgs.interception-tools-plugins.caps2esc ];
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      description = ''
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        A list of interception tools plugins that will be made available to use
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        inside the udevmon configuration.
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      '';
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    };
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    udevmonConfig = mkOption {
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      type = types.either types.str types.path;
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      default = ''
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        - JOB: "intercept -g $DEVNODE | caps2esc | uinput -d $DEVNODE"
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          DEVICE:
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            EVENTS:
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              EV_KEY: [KEY_CAPSLOCK, KEY_ESC]
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      '';
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      example = ''
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        - JOB: "intercept -g $DEVNODE | y2z | x2y | uinput -d $DEVNODE"
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          DEVICE:
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            EVENTS:
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              EV_KEY: [KEY_X, KEY_Y]
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      '';
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      description = ''
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        String of udevmon YAML configuration, or path to a udevmon YAML
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        configuration file.
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      '';
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    };
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  };
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  config = mkIf cfg.enable {
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    systemd.services.interception-tools = {
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      description = "Interception tools";
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      path = [ pkgs.bash pkgs.interception-tools ] ++ cfg.plugins;
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      serviceConfig = {
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        ExecStart = ''
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          ${pkgs.interception-tools}/bin/udevmon -c \
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          ${if builtins.typeOf cfg.udevmonConfig == "path"
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          then cfg.udevmonConfig
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          else pkgs.writeText "udevmon.yaml" cfg.udevmonConfig}
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        '';
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        Nice = -20;
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      };
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      wantedBy = [ "multi-user.target" ];
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    };
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  };
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}
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