kotsukotsu/nix/module.nix
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2026-04-19 08:51:24 +07:00

134 lines
3.6 KiB
Nix

{ config, lib, pkgs, ... }:
let
cfg = config.services.kotsukotsu;
launcher = pkgs.writeShellScript "kotsukotsu-launch" ''
exec ${cfg.currentPath}/bin/kotsukotsu
'';
ensureCurrent = pkgs.writeShellScript "kotsukotsu-ensure-current" ''
if [ ! -e ${cfg.currentPath} ]; then
ln -sfn ${cfg.package} ${cfg.currentPath}
fi
'';
in
{
options.services.kotsukotsu = {
enable = lib.mkEnableOption "kotsukotsu typing app";
package = lib.mkOption {
type = lib.types.nullOr lib.types.package;
default = null;
description = "The kotsukotsu package to run, typically inputs.kotsukotsu.packages.${pkgs.system}.default.";
};
host = lib.mkOption {
type = lib.types.str;
default = "127.0.0.1";
description = "Listen address for the Bun server.";
};
port = lib.mkOption {
type = lib.types.port;
default = 5174;
description = "Listen port for the Bun server.";
};
domain = lib.mkOption {
type = lib.types.nullOr lib.types.str;
default = null;
example = "typing.example.com";
description = "Public domain used for WebAuthn RP ID and cookie origin.";
};
dataDir = lib.mkOption {
type = lib.types.str;
default = "/var/lib/kotsukotsu";
description = "Directory for the persistent SQLite database.";
};
currentPath = lib.mkOption {
type = lib.types.str;
default = "/var/lib/kotsukotsu/current";
description = "Stable symlink path that points at the active app package.";
};
user = lib.mkOption {
type = lib.types.str;
default = "kotsukotsu";
description = "User account for the service.";
};
group = lib.mkOption {
type = lib.types.str;
default = "kotsukotsu";
description = "Group for the service.";
};
secureCookies = lib.mkOption {
type = lib.types.bool;
default = true;
description = "Whether to mark auth cookies as Secure.";
};
};
config = lib.mkIf cfg.enable {
assertions = [
{
assertion = cfg.package != null;
message = "services.kotsukotsu.package must be set, usually from this flake input.";
}
{
assertion = cfg.domain != null && cfg.domain != "";
message = "services.kotsukotsu.domain must be set.";
}
{
assertion = lib.hasPrefix "/" cfg.dataDir;
message = "services.kotsukotsu.dataDir must be an absolute path.";
}
{
assertion = lib.hasPrefix "/" cfg.currentPath;
message = "services.kotsukotsu.currentPath must be an absolute path.";
}
];
users.groups = lib.mkIf (cfg.group == "kotsukotsu") {
kotsukotsu = { };
};
users.users = lib.mkIf (cfg.user == "kotsukotsu") {
kotsukotsu = {
isSystemUser = true;
group = cfg.group;
home = toString cfg.dataDir;
createHome = false;
};
};
systemd.tmpfiles.rules = [
"d ${toString cfg.dataDir} 0750 ${cfg.user} ${cfg.group} -"
];
systemd.services.kotsukotsu = {
description = "kotsukotsu typing app";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
environment = {
APP_ORIGIN = "https://${cfg.domain}";
HOST = cfg.host;
PORT = builtins.toString cfg.port;
SESSION_COOKIE_SECURE = lib.boolToString cfg.secureCookies;
SQLITE_PATH = "${cfg.dataDir}/leo-typing.db";
};
serviceConfig = {
ExecStart = launcher;
ExecStartPre = ensureCurrent;
Group = cfg.group;
Restart = "on-failure";
User = cfg.user;
WorkingDirectory = cfg.dataDir;
};
};
};
}