nix setup

nix/module.nix

@@ -0,0 +1,126 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.services.demostf-cleanup;
+  format = pkgs.formats.toml {};
+  configFile = format.generate "demostf-cleanup.toml" {
+    api = {
+      url = cfg.source;
+      key_file = "$CREDENTIALS_DIRECTORY/api_key";
+    };
+    storage = {
+      root = cfg.storageRoot;
+    };
+    cleanup = {
+      from_backend = cfg.backend;
+      age = cfg.age;
+    };
+  };
+in {
+  options.services.demostf-cleanup = {
+    enable = mkEnableOption "demostf-cleanup";
+
+    source = mkOption {
+      type = types.str;
+      default = "https://api.demos.tf";
+      description = "Api endpoint to cleanup demos for";
+    };
+
+    storageRoot = mkOption {
+      type = types.str;
+      description = "path local demo files are stored at";
+    };
+
+    backend = mkOption {
+      type = types.str;
+      description = "name of the local demos backend";
+    };
+
+    age = mkOption {
+      type = types.int;
+      default = 157784629; # 5 years
+      description = "age of demos to cleanup";
+    };
+
+    keyFile = mkOption {
+      type = types.str;
+      description = "path containing the edit secret";
+    };
+
+    user = mkOption {
+      type = types.str;
+      description = "user that owns the local demos";
+    };
+
+    log = mkOption {
+      type = types.str;
+      default = "info";
+      description = "log level";
+    };
+
+    interval = mkOption {
+      type = types.str;
+      default = "*:0/10";
+      description = "how often to run";
+    };
+
+    package = mkOption {
+      type = types.package;
+      defaultText = literalExpression "pkgs.demostf-cleanup";
+      description = "package to use";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services."demostf-cleanup" = {
+      environment = {
+        RUST_LOG = cfg.log;
+      };
+
+      serviceConfig = {
+        ExecStart = "${getExe cfg.package} ${configFile}";
+        ReadWritePaths = [cfg.storageRoot];
+        LoadCredential = [
+          "api_key:${cfg.keyFile}"
+        ];
+        Restart = "on-failure";
+        User = cfg.user;
+        PrivateTmp = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        ProtectClock = true;
+        CapabilityBoundingSet = true;
+        ProtectKernelLogs = true;
+        ProtectControlGroups = true;
+        SystemCallArchitectures = "native";
+        ProtectKernelModules = true;
+        RestrictNamespaces = true;
+        MemoryDenyWriteExecute = true;
+        ProtectHostname = true;
+        LockPersonality = true;
+        ProtectKernelTunables = true;
+        RestrictAddressFamilies = ["AF_INET" "AF_INET6"];
+        RestrictRealtime = true;
+        ProtectProc = "noaccess";
+        SystemCallFilter = ["@system-service" "~@resources" "~@privileged"];
+        IPAddressDeny = ["localhost" "link-local" "multicast"];
+        ProcSubset = "pid";
+      };
+    };
+
+    systemd.timers."demostf-cleanup" = {
+      enable = true;
+      description = "Cleanup demos for demos.tf";
+      wantedBy = ["multi-user.target"];
+      timerConfig = {
+        OnCalendar = cfg.interval;
+      };
+    };
+  };
+}

nix/overlay.nix

@@ -0,0 +1,3 @@
+final: prev: {
+  demostf-cleanup = final.callPackage ./package.nix {};
+}

nix/package.nix

@@ -0,0 +1,31 @@
+{
+  rustPlatform,
+  lib,
+  openssl,
+  pkg-config,
+}: let
+  inherit (lib.sources) sourceByRegex;
+  inherit (builtins) fromTOML readFile;
+  src = sourceByRegex ../. ["Cargo.*" "(src)(/.*)?"];
+  cargoPackage = (fromTOML (readFile ../Cargo.toml)).package;
+in
+  rustPlatform.buildRustPackage {
+    pname = cargoPackage.name;
+    inherit (cargoPackage) version;
+
+    inherit src;
+
+    buildInputs = [
+      openssl
+    ];
+
+    nativeBuildInputs = [
+      pkg-config
+    ];
+
+    cargoLock = {
+      lockFile = ../Cargo.lock;
+    };
+
+    meta.mainProgram = "cleanup";
+  }