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15b7e102b6
* Safer defaults for immutable znc config I just lost all the options I configured in ZNC, because the mutable config was overwritten. I accept any suggestions on the way to implement this, but overwriting a mutable config by default seems weird. If we want to do this, we should ensure that ZNC does not allow to edit the config via the webmin when cfg.mutable is false. * Do not backup old config files. There seems to be little need for backups if mutable becomes a voluntary opt-out. * fixup
421 lines
12 KiB
Nix
421 lines
12 KiB
Nix
{ config, lib, pkgs, ...}:
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with lib;
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let
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cfg = config.services.znc;
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defaultUser = "znc"; # Default user to own process.
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# Default user and pass:
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# un=znc
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# pw=nixospass
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defaultUserName = "znc";
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defaultPassBlock = "
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<Pass password>
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Method = sha256
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Hash = e2ce303c7ea75c571d80d8540a8699b46535be6a085be3414947d638e48d9e93
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Salt = l5Xryew4g*!oa(ECfX2o
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</Pass>
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";
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modules = pkgs.buildEnv {
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name = "znc-modules";
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paths = cfg.modulePackages;
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};
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# Keep znc.conf in nix store, then symlink or copy into `dataDir`, depending on `mutable`.
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notNull = a: ! isNull a;
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mkZncConf = confOpts: ''
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Version = 1.6.3
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${concatMapStrings (n: "LoadModule = ${n}\n") confOpts.modules}
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<Listener l>
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Port = ${toString confOpts.port}
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IPv4 = true
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IPv6 = true
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SSL = ${boolToString confOpts.useSSL}
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</Listener>
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<User ${confOpts.userName}>
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${confOpts.passBlock}
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Admin = true
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Nick = ${confOpts.nick}
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AltNick = ${confOpts.nick}_
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Ident = ${confOpts.nick}
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RealName = ${confOpts.nick}
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${concatMapStrings (n: "LoadModule = ${n}\n") confOpts.userModules}
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${ lib.concatStringsSep "\n" (lib.mapAttrsToList (name: net: ''
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<Network ${name}>
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${concatMapStrings (m: "LoadModule = ${m}\n") net.modules}
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Server = ${net.server} ${lib.optionalString net.useSSL "+"}${toString net.port} ${net.password}
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${concatMapStrings (c: "<Chan #${c}>\n</Chan>\n") net.channels}
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${lib.optionalString net.hasBitlbeeControlChannel ''
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<Chan &bitlbee>
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</Chan>
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''}
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${net.extraConf}
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</Network>
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'') confOpts.networks) }
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</User>
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${confOpts.extraZncConf}
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'';
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zncConfFile = pkgs.writeTextFile {
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name = "znc.conf";
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text = if cfg.zncConf != ""
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then cfg.zncConf
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else mkZncConf cfg.confOptions;
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};
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networkOpts = { ... }: {
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options = {
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server = mkOption {
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type = types.str;
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example = "chat.freenode.net";
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description = ''
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IRC server address.
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'';
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};
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port = mkOption {
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type = types.int;
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default = 6697;
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example = 6697;
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description = ''
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IRC server port.
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'';
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};
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userName = mkOption {
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default = "";
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example = "johntron";
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type = types.string;
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description = ''
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A nick identity specific to the IRC server.
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'';
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};
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password = mkOption {
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type = types.str;
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default = "";
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description = ''
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IRC server password, such as for a Slack gateway.
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'';
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};
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useSSL = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to use SSL to connect to the IRC server.
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'';
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};
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modulePackages = mkOption {
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type = types.listOf types.package;
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default = [];
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example = [ "pkgs.zncModules.push" "pkgs.zncModules.fish" ];
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description = ''
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External ZNC modules to build.
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'';
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};
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modules = mkOption {
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type = types.listOf types.str;
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default = [ "simple_away" ];
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example = literalExample "[ simple_away sasl ]";
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description = ''
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ZNC modules to load.
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'';
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};
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channels = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "nixos" ];
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description = ''
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IRC channels to join.
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'';
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};
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hasBitlbeeControlChannel = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to add the special Bitlbee operations channel.
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'';
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};
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extraConf = mkOption {
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default = "";
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type = types.lines;
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example = ''
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Encoding = ^UTF-8
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FloodBurst = 4
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FloodRate = 1.00
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IRCConnectEnabled = true
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Ident = johntron
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JoinDelay = 0
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Nick = johntron
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'';
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description = ''
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Extra config for the network.
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'';
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};
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};
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};
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in
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{
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###### Interface
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options = {
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services.znc = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable a ZNC service for a user.
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'';
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};
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user = mkOption {
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default = "znc";
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example = "john";
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type = types.string;
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description = ''
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The name of an existing user account to use to own the ZNC server process.
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If not specified, a default user will be created to own the process.
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'';
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};
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group = mkOption {
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default = "";
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example = "users";
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type = types.string;
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description = ''
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Group to own the ZNCserver process.
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'';
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};
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dataDir = mkOption {
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default = "/var/lib/znc/";
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example = "/home/john/.znc/";
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type = types.path;
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description = ''
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The data directory. Used for configuration files and modules.
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'';
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};
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openFirewall = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to open ports in the firewall for ZNC.
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'';
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};
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zncConf = mkOption {
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default = "";
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example = "See: http://wiki.znc.in/Configuration";
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type = types.lines;
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description = ''
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Config file as generated with `znc --makeconf` to use for the whole ZNC configuration.
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If specified, `confOptions` will be ignored, and this value, as-is, will be used.
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If left empty, a conf file with default values will be used.
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'';
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};
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confOptions = {
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modules = mkOption {
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type = types.listOf types.str;
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default = [ "webadmin" "adminlog" ];
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example = [ "partyline" "webadmin" "adminlog" "log" ];
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description = ''
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A list of modules to include in the `znc.conf` file.
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'';
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};
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userModules = mkOption {
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type = types.listOf types.str;
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default = [ "chansaver" "controlpanel" ];
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example = [ "chansaver" "controlpanel" "fish" "push" ];
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description = ''
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A list of user modules to include in the `znc.conf` file.
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'';
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};
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userName = mkOption {
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default = defaultUserName;
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example = "johntron";
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type = types.string;
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description = ''
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The user name used to log in to the ZNC web admin interface.
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'';
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};
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networks = mkOption {
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default = { };
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type = with types; attrsOf (submodule networkOpts);
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description = ''
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IRC networks to connect the user to.
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'';
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example = {
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"freenode" = {
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server = "chat.freenode.net";
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port = 6697;
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useSSL = true;
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modules = [ "simple_away" ];
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};
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};
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};
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nick = mkOption {
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default = "znc-user";
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example = "john";
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type = types.string;
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description = ''
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The IRC nick.
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'';
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};
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passBlock = mkOption {
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example = defaultPassBlock;
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type = types.string;
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description = ''
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Generate with `nix-shell -p znc --command "znc --makepass"`.
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This is the password used to log in to the ZNC web admin interface.
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'';
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};
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port = mkOption {
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default = 5000;
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example = 5000;
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type = types.int;
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description = ''
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Specifies the port on which to listen.
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'';
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};
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useSSL = mkOption {
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default = true;
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type = types.bool;
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description = ''
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Indicates whether the ZNC server should use SSL when listening on the specified port. A self-signed certificate will be generated.
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'';
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};
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extraZncConf = mkOption {
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default = "";
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type = types.lines;
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description = ''
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Extra config to `znc.conf` file.
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'';
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};
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};
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modulePackages = mkOption {
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type = types.listOf types.package;
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default = [ ];
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example = literalExample "[ pkgs.zncModules.fish pkgs.zncModules.push ]";
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description = ''
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A list of global znc module packages to add to znc.
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'';
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};
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mutable = mkOption {
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default = true;
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type = types.bool;
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description = ''
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Indicates whether to allow the contents of the `dataDir` directory to be changed
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by the user at run-time.
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If true, modifications to the ZNC configuration after its initial creation are not
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overwritten by a NixOS system rebuild.
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If false, the ZNC configuration is rebuilt by every system rebuild.
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If the user wants to manage the ZNC service using the web admin interface, this value
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should be set to true.
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'';
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};
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extraFlags = mkOption {
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default = [ ];
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example = [ "--debug" ];
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type = types.listOf types.str;
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description = ''
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Extra flags to use when executing znc command.
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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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networking.firewall = mkIf cfg.openFirewall {
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allowedTCPPorts = [ cfg.confOptions.port ];
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};
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systemd.services.znc = {
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description = "ZNC Server";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.service" ];
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serviceConfig = {
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User = cfg.user;
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Group = cfg.group;
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Restart = "always";
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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ExecStop = "${pkgs.coreutils}/bin/kill -INT $MAINPID";
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};
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preStart = ''
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${pkgs.coreutils}/bin/mkdir -p ${cfg.dataDir}/configs
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# If mutable, regenerate conf file every time.
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${optionalString (!cfg.mutable) ''
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${pkgs.coreutils}/bin/echo "znc is set to be system-managed. Now deleting old znc.conf file to be regenerated."
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${pkgs.coreutils}/bin/rm -f ${cfg.dataDir}/configs/znc.conf
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''}
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# Ensure essential files exist.
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if [[ ! -f ${cfg.dataDir}/configs/znc.conf ]]; then
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${pkgs.coreutils}/bin/echo "No znc.conf file found in ${cfg.dataDir}. Creating one now."
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${pkgs.coreutils}/bin/cp --no-clobber ${zncConfFile} ${cfg.dataDir}/configs/znc.conf
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${pkgs.coreutils}/bin/chmod u+rw ${cfg.dataDir}/configs/znc.conf
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${pkgs.coreutils}/bin/chown ${cfg.user} ${cfg.dataDir}/configs/znc.conf
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fi
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if [[ ! -f ${cfg.dataDir}/znc.pem ]]; then
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${pkgs.coreutils}/bin/echo "No znc.pem file found in ${cfg.dataDir}. Creating one now."
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${pkgs.znc}/bin/znc --makepem --datadir ${cfg.dataDir}
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fi
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# Symlink modules
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rm ${cfg.dataDir}/modules || true
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ln -fs ${modules}/lib/znc ${cfg.dataDir}/modules
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'';
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script = "${pkgs.znc}/bin/znc --foreground --datadir ${cfg.dataDir} ${toString cfg.extraFlags}";
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};
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users.extraUsers = optional (cfg.user == defaultUser)
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{ name = defaultUser;
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description = "ZNC server daemon owner";
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group = defaultUser;
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uid = config.ids.uids.znc;
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home = cfg.dataDir;
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createHome = true;
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};
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users.extraGroups = optional (cfg.user == defaultUser)
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{ name = defaultUser;
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gid = config.ids.gids.znc;
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members = [ defaultUser ];
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};
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};
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}
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