nix-scripts/nixbld-etc-nixos/homu/nixos-module.nix

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{ config, pkgs, lib, ... }:
with lib;
let
homu = pkgs.callPackage ./pkg.nix {};
toToml = key: value:
let valueString =
if builtins.isString value
then "\"" + (builtins.replaceStrings ["\"" "\\"] ["\\\"" "\\\\"] value) + "\""
else toString value;
in "${key} = ${valueString}\n";
defaultConfig = {
db = {
file = "/var/db/homu/main.db";
};
};
cfg = config.services.homu;
homuConfig = defaultConfig // cfg.config;
configFilter = f:
filterAttrs (key: value: f value) homuConfig;
topLevelConfig =
configFilter (value: ! builtins.isAttrs value);
configSections =
configFilter (value: builtins.isAttrs value);
configFile = builtins.toFile "config.toml" (
builtins.concatStringsSep "" (
(attrsets.mapAttrsToList toToml topLevelConfig) ++
(builtins.concatLists (attrsets.mapAttrsToList
(sectionName: sectionConfig:
[ "[${sectionName}]\n" ] ++
(attrsets.mapAttrsToList toToml sectionConfig)
) configSections)
))
);
dbFile = homuConfig.db.file;
in
{
options.services.homu = {
enable = mkOption {
type = types.bool;
default = false;
description = "Enable the bot";
};
user = mkOption {
type = types.str;
default = "nobody";
};
group = mkOption {
type = types.str;
default = "nogroup";
};
config = mkOption {
description = "Structured data for config.toml";
type = with types; attrsOf unspecified;
};
};
config = mkIf cfg.enable {
systemd.services.homu-dbdir = {
description = "Homu bot database directory";
serviceConfig = {
Type = "oneshot";
ExecStart = [
"${pkgs.coreutils}/bin/mkdir -p ${dirOf dbFile}"
"${pkgs.coreutils}/bin/chown -R ${cfg.user}:${cfg.group} ${dirOf dbFile}"
];
};
};
systemd.services.homu = {
description = "Homu bot";
wantedBy = [ "multi-user.target" ];
requires = [ "homu-dbdir.service" ];
after = [ "network.target" ];
serviceConfig = {
Type = "simple";
ExecStart = "${homu}/bin/homu -c ${configFile}";
Restart = "always";
RestartSec = "5sec";
User = cfg.user;
Group = cfg.group;
};
};
};
}