discord-bot/flake.nix

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{
description = "Skynet Discord Bot";
inputs = {
nixpkgs.url = "nixpkgs/nixos-23.05";
naersk.url = "github:nix-community/naersk";
utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, utils, naersk }: utils.lib.eachDefaultSystem (system:
let
pkgs = nixpkgs.legacyPackages."${system}";
naersk-lib = naersk.lib."${system}";
package_name = "skynet_discord_bot";
desc = "Skynet Discord Bot";
in rec {
# `nix build`
packages."${package_name}" = naersk-lib.buildPackage {
pname = "${package_name}";
root = ./.;
buildInputs = [
pkgs.openssl
pkgs.pkg-config
];
};
defaultPackage = packages."${package_name}";
# `nix run`
apps."${package_name}" = utils.lib.mkApp {
drv = packages."${package_name}";
};
defaultApp = apps."${package_name}";
# `nix develop`
devShell = pkgs.mkShell {
nativeBuildInputs = with pkgs; [ rustc cargo pkg-config openssl];
};
nixosModule = { lib, pkgs, config, ... }:
with lib;
let
cfg = config.services."${package_name}";
# secret options are in the env file(s) loaded separately
environment_config = {
LDAP_API = cfg.ldap;
SKYNET_SERVER = cfg.discord.server;
HOME = cfg.home;
DATABASE = "database.db";
CSV = "wolves.csv";
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};
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service_name = script: lib.strings.sanitizeDerivationName("${cfg.user}@${script}");
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# oneshot scripts to run
serviceGenerator = mapAttrs' (script: time: nameValuePair (service_name script) {
description = "Service for ${desc} ${script}";
wantedBy = [ ];
after = [ "network-online.target" ];
environment = environment_config;
serviceConfig = {
Type = "oneshot";
User = "${cfg.user}";
Group = "${cfg.user}";
ExecStart = "${self.defaultPackage."${system}"}/bin/${script}";
EnvironmentFile = [
"${cfg.env.ldap}"
"${cfg.env.discord}"
"${cfg.env.mail}"
];
};
});
# each timer will run the above service
timerGenerator = mapAttrs' (script: time: nameValuePair (service_name script) {
description = "Timer for ${desc} ${script}";
wantedBy = [ "timers.target" ];
partOf = [ "${service_name script}.service" ];
timerConfig = {
OnCalendar = time;
Unit = "${service_name script}.service";
Persistent = true;
};
});
# modify these
scripts = {
# every 20 min
"update_data" = "*:0,20,40";
# groups are updated every hour, offset from teh ldap
"update_users" = "*:05:00";
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};
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in {
options.services."${package_name}" = {
enable = mkEnableOption "enable ${package_name}";
env = {
ldap = mkOption rec {
type = types.str;
description = "ENV file with LDAP_DISCORD_AUTH";
};
discord = mkOption rec {
type = types.str;
description = "ENV file with DISCORD_TOKEN";
};
mail = mkOption rec {
type = types.str;
description = "ENV file with EMAIL_SMTP, EMAIL_USER, EMAIL_PASS";
};
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};
discord = {
server = mkOption rec {
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type = types.str;
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description = "ID of the server the bot runs on";
};
};
ldap = mkOption rec {
type = types.str;
default = "https://api.account.skynet.ie";
description = "Location of the ldap api";
};
user = mkOption rec {
type = types.str;
default = "${package_name}";
description = "The user to run the service";
};
home = mkOption rec {
type = types.str;
default = "/etc/${cfg.prefix}${package_name}";
description = "The home for the user";
};
prefix = mkOption rec {
type = types.str;
default = "skynet_";
example = default;
description = "The prefix used to name service/folders";
};
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};
config = mkIf cfg.enable {
users.groups."${cfg.user}" = { };
users.users."${cfg.user}" = {
createHome = true;
isSystemUser = true;
home = "${cfg.home}";
group = "${cfg.user}";
};
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systemd.services = {
# main service
"${package_name}" = {
description = desc;
wantedBy = [ "multi-user.target" ];
after = [ "network-online.target" ];
wants = [ ];
environment = environment_config;
serviceConfig = {
User = "${cfg.user}";
Group = "${cfg.user}";
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Restart = "always";
ExecStart = "${self.defaultPackage."${system}"}/bin/${package_name}";
# can have multiple env files
EnvironmentFile = [
"${cfg.env.ldap}"
"${cfg.env.discord}"
"${cfg.env.mail}"
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];
};
};
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} // serviceGenerator scripts;
# timers to run the above services
systemd.timers = timerGenerator scripts;
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};
};
}
);
}