Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
		
			
				
	
	
		
			65 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			65 lines
		
	
	
		
			1.2 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
# NixOS module for Freenet daemon
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{ config, lib, pkgs, ... }:
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with lib;
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let
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  cfg = config.services.freenet;
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  varDir = "/var/lib/freenet";
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in
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{
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  ### configuration
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  options = {
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    services.freenet = {
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      enable = mkOption {
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        type = types.uniq types.bool;
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        default = false;
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        description = "Enable the Freenet daemon";
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      };
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      nice = mkOption {
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        type = types.uniq types.int;
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        default = 10;
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        description = "Set the nice level for the Freenet daemon";
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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.freenet = {
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      description = "Freenet daemon";
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      after = [ "network.target" ];
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      wantedBy = [ "multi-user.target" ];
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      serviceConfig.ExecStart = "${pkgs.freenet}/bin/freenet";
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      serviceConfig.User = "freenet";
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      serviceConfig.UMask = "0007";
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      serviceConfig.WorkingDirectory = varDir;
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      serviceConfig.Nice = cfg.nice;
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    };
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    users.extraUsers.freenet = {
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      group = "freenet";
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      description = "Freenet daemon user";
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      home = varDir;
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      createHome = true;
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      uid = config.ids.uids.freenet;
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    };
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    users.extraGroups.freenet.gid = config.ids.gids.freenet;
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  };
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}
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