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.
78 lines
1.5 KiB
Nix
78 lines
1.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.amule;
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user = if cfg.user != null then cfg.user else "amule";
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in
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{
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###### interface
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options = {
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services.amule = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to run the AMule daemon. You need to manually run "amuled --ec-config" to configure the service for the first time.
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'';
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};
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dataDir = mkOption {
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default = ''/home/${user}/'';
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description = ''
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The directory holding configuration, incoming and temporary files.
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'';
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};
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user = mkOption {
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default = null;
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description = ''
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The user the AMule daemon should run as.
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'';
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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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users.extraUsers = mkIf (cfg.user == null) [
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{ name = "amule";
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description = "AMule daemon";
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group = "amule";
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uid = config.ids.uids.amule;
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} ];
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users.extraGroups = mkIf (cfg.user == null) [
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{ name = "amule";
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gid = config.ids.gids.amule;
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} ];
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jobs.amuled =
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{ description = "AMule daemon";
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startOn = "ip-up";
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preStart = ''
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mkdir -p ${cfg.dataDir}
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chown ${user} ${cfg.dataDir}
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'';
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exec = ''
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${pkgs.su}/bin/su -s ${pkgs.stdenv.shell} ${user} \
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-c 'HOME="${cfg.dataDir}" ${pkgs.amuleDaemon}/bin/amuled'
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'';
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};
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};
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}
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