90 lines
2.5 KiB
Nix
90 lines
2.5 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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nncpCfgFile = "/run/nncp.hjson";
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programCfg = config.programs.nncp;
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settingsFormat = pkgs.formats.json { };
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jsonCfgFile = settingsFormat.generate "nncp.json" programCfg.settings;
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pkg = programCfg.package;
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in {
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options.programs.nncp = {
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enable =
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lib.mkEnableOption "NNCP (Node to Node copy) utilities and configuration";
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group = lib.mkOption {
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type = lib.types.str;
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default = "uucp";
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description = ''
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The group under which NNCP files shall be owned.
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Any member of this group may access the secret keys
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of this NNCP node.
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'';
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};
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package = lib.mkPackageOption pkgs "nncp" { };
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secrets = lib.mkOption {
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type = with lib.types; listOf str;
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example = [ "/run/keys/nncp.hjson" ];
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description = ''
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A list of paths to NNCP configuration files that should not be
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in the Nix store. These files are layered on top of the values at
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[](#opt-programs.nncp.settings).
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'';
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};
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settings = lib.mkOption {
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type = settingsFormat.type;
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description = ''
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NNCP configuration, see
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<http://www.nncpgo.org/Configuration.html>.
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At runtime these settings will be overlayed by the contents of
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[](#opt-programs.nncp.secrets) into the file
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`${nncpCfgFile}`. Node keypairs go in
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`secrets`, do not specify them in
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`settings` as they will be leaked into
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`/nix/store`!
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'';
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default = { };
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};
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};
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config = lib.mkIf programCfg.enable {
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environment = {
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systemPackages = [ pkg ];
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etc."nncp.hjson".source = nncpCfgFile;
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};
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programs.nncp.settings = {
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spool = lib.mkDefault "/var/spool/nncp";
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log = lib.mkDefault "/var/spool/nncp/log";
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};
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systemd.tmpfiles.rules = [
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"d ${programCfg.settings.spool} 0770 root ${programCfg.group}"
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"f ${programCfg.settings.log} 0770 root ${programCfg.group}"
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];
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systemd.services.nncp-config = {
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path = [ pkg ];
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description = "Generate NNCP configuration";
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wantedBy = [ "basic.target" ];
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serviceConfig.Type = "oneshot";
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script = ''
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umask 127
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rm -f ${nncpCfgFile}
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for f in ${jsonCfgFile} ${builtins.toString config.programs.nncp.secrets}
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do
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${lib.getExe pkgs.hjson-go} -c <"$f"
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done |${lib.getExe pkgs.jq} --slurp 'reduce .[] as $x ({}; . * $x)' >${nncpCfgFile}
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chgrp ${programCfg.group} ${nncpCfgFile}
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'';
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};
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};
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meta.maintainers = with lib.maintainers; [ ehmry ];
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}
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