29027fd1e1
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.
57 lines
1.3 KiB
Nix
57 lines
1.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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interfaces = config.services.wakeonlan.interfaces;
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ethtool = "${pkgs.ethtool}/sbin/ethtool";
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passwordParameter = password : if (password == "") then "" else
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"sopass ${password}";
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methodParameter = {method, password} :
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if method == "magicpacket" then "wol g"
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else if method == "password" then "wol s so ${passwordParameter password}"
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else throw "Wake-On-Lan method not supported";
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line = { interface, method ? "magicpacket", password ? "" }: ''
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${ethtool} -s ${interface} ${methodParameter {inherit method password;}}
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'';
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concatStrings = fold (x: y: x + y) "";
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lines = concatStrings (map (l: line l) interfaces);
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in
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{
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###### interface
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options = {
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services.wakeonlan.interfaces = mkOption {
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default = [ ];
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example = [
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{
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interface = "eth0";
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method = "password";
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password = "00:11:22:33:44:55";
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}
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];
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description = ''
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Interfaces where to enable Wake-On-LAN, and how. Two methods available:
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"magickey" and "password". The password has the shape of six bytes
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in hexadecimal separated by a colon each. For more information,
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check the ethtool manual.
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'';
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};
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};
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###### implementation
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config.powerManagement.powerDownCommands = lines;
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}
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