Merge pull request #249765 from NixOS/nixos/modules/honk-init

nixos/honk: init

nixos/doc/manual/release-notes/rl-2311.section.md

···
 
 - [eris-server](https://codeberg.org/eris/eris-go). [ERIS](https://eris.codeberg.page/) is an encoding for immutable storage and this server provides block exchange as well as content decoding over HTTP and through a FUSE file-system. Available as [services.eris-server](#opt-services.eris-server.enable).
 
+- [Honk](https://humungus.tedunangst.com/r/honk), a complete ActivityPub server with minimal setup and support costs.
+  Available as [services.honk](#opt-services.honk.enable).
+
 ## Backward Incompatibilities {#sec-release-23.11-incompatibilities}
 
 - The `boot.loader.raspberryPi` options have been marked deprecated, with intent for removal for NixOS 24.11. They had a limited use-case, and do not work like people expect. They required either very old installs ([before mid-2019](https://github.com/NixOS/nixpkgs/pull/62462)) or customized builds out of scope of the standard and generic AArch64 support. That option set never supported the Raspberry Pi 4 family of devices.

nixos/modules/module-list.nix

···
   ./services/web-apps/healthchecks.nix
   ./services/web-apps/hedgedoc.nix
   ./services/web-apps/hledger-web.nix
+  ./services/web-apps/honk.nix
   ./services/web-apps/icingaweb2/icingaweb2.nix
   ./services/web-apps/icingaweb2/module-monitoring.nix
   ./services/web-apps/invidious.nix

nixos/modules/services/web-apps/honk.md

···
+# Honk {#module-services-honk}
+
+With Honk on NixOS you can quickly configure a complete ActivityPub server with
+minimal setup and support costs.
+
+## Basic usage {#module-services-honk-basic-usage}
+
+A minimal configuration looks like this:
+
+```nix
+{
+  services.honk = {
+    enable = true;
+    host = "0.0.0.0";
+    port = 8080;
+    username = "username";
+    passwordFile = "/etc/honk/password.txt";
+    servername = "honk.example.com";
+  };
+
+  networking.firewall.allowedTCPPorts = [ 8080 ];
+}
+```

nixos/modules/services/web-apps/honk.nix

···
+{ config
+, lib
+, pkgs
+, ...
+}:
+let
+  cfg = config.services.honk;
+
+  honk-initdb-script = cfg: pkgs.writeShellApplication {
+    name = "honk-initdb-script";
+
+    runtimeInputs = with pkgs; [ coreutils ];
+
+    text = ''
+      PW=$(cat "$CREDENTIALS_DIRECTORY/honk_passwordFile")
+
+      echo -e "${cfg.username}\n''$PW\n${cfg.host}:${toString cfg.port}\n${cfg.servername}" | ${lib.getExe cfg.package} -datadir "$STATE_DIRECTORY" init
+    '';
+  };
+in
+{
+  options = {
+    services.honk = {
+      enable = lib.mkEnableOption (lib.mdDoc "the Honk server");
+      package = lib.mkPackageOptionMD pkgs "honk" { };
+
+      host = lib.mkOption {
+        default = "127.0.0.1";
+        description = lib.mdDoc ''
+          The host name or IP address the server should listen to.
+        '';
+        type = lib.types.str;
+      };
+
+      port = lib.mkOption {
+        default = 8080;
+        description = lib.mdDoc ''
+          The port the server should listen to.
+        '';
+        type = lib.types.port;
+      };
+
+      username = lib.mkOption {
+        description = lib.mdDoc ''
+          The admin account username.
+        '';
+        type = lib.types.str;
+      };
+
+      passwordFile = lib.mkOption {
+        description = lib.mdDoc ''
+          Password for admin account.
+          NOTE: Should be string not a store path, to prevent the password from being world readable
+        '';
+        type = lib.types.path;
+      };
+
+      servername = lib.mkOption {
+        description = lib.mdDoc ''
+          The server name.
+        '';
+        type = lib.types.str;
+      };
+
+      extraJS = lib.mkOption {
+        default = null;
+        description = lib.mdDoc ''
+          An extra JavaScript file to be loaded by the client.
+        '';
+        type = lib.types.nullOr lib.types.path;
+      };
+
+      extraCSS = lib.mkOption {
+        default = null;
+        description = lib.mdDoc ''
+          An extra CSS file to be loaded by the client.
+        '';
+        type = lib.types.nullOr lib.types.path;
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = cfg.username or "" != "";
+        message = ''
+          You have to define a username for Honk (`services.honk.username`).
+        '';
+      }
+      {
+        assertion = cfg.servername or "" != "";
+        message = ''
+          You have to define a servername for Honk (`services.honk.servername`).
+        '';
+      }
+    ];
+
+    systemd.services.honk-initdb = {
+      description = "Honk server database setup";
+      requiredBy = [ "honk.service" ];
+      before = [ "honk.service" ];
+
+      serviceConfig = {
+        LoadCredential = [
+          "honk_passwordFile:${cfg.passwordFile}"
+        ];
+        Type = "oneshot";
+        StateDirectory = "honk";
+        DynamicUser = true;
+        RemainAfterExit = true;
+        ExecStart = lib.getExe (honk-initdb-script cfg);
+        PrivateTmp = true;
+      };
+
+      unitConfig = {
+        ConditionPathExists = [
+          # Skip this service if the database already exists
+          "!$STATE_DIRECTORY/honk.db"
+        ];
+      };
+    };
+
+    systemd.services.honk = {
+      description = "Honk server";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      bindsTo = [ "honk-initdb.service" ];
+      preStart = ''
+        mkdir -p $STATE_DIRECTORY/views
+        ${lib.optionalString (cfg.extraJS != null) "ln -fs ${cfg.extraJS} $STATE_DIRECTORY/views/local.js"}
+        ${lib.optionalString (cfg.extraCSS != null) "ln -fs ${cfg.extraCSS} $STATE_DIRECTORY/views/local.css"}
+        ${lib.getExe cfg.package} -datadir $STATE_DIRECTORY -viewdir ${cfg.package}/share/honk backup $STATE_DIRECTORY/backup
+        ${lib.getExe cfg.package} -datadir $STATE_DIRECTORY -viewdir ${cfg.package}/share/honk upgrade
+        ${lib.getExe cfg.package} -datadir $STATE_DIRECTORY -viewdir ${cfg.package}/share/honk cleanup
+      '';
+      serviceConfig = {
+        ExecStart = ''
+          ${lib.getExe cfg.package} -datadir $STATE_DIRECTORY -viewdir ${cfg.package}/share/honk
+        '';
+        StateDirectory = "honk";
+        DynamicUser = true;
+        PrivateTmp = "yes";
+        Restart = "on-failure";
+      };
+    };
+  };
+
+  meta = {
+    maintainers = with lib.maintainers; [ drupol ];
+    doc = ./honk.md;
+  };
+}

nixos/tests/all-tests.nix

···
   hedgedoc = handleTest ./hedgedoc.nix {};
   herbstluftwm = handleTest ./herbstluftwm.nix {};
   homepage-dashboard = handleTest ./homepage-dashboard.nix {};
+  honk = runTest ./honk.nix;
   installed-tests = pkgs.recurseIntoAttrs (handleTest ./installed-tests {});
   invidious = handleTest ./invidious.nix {};
   oci-containers = handleTestOn ["aarch64-linux" "x86_64-linux"] ./oci-containers.nix {};

nixos/tests/honk.nix

···
+{ lib, ... }:
+
+{
+  name = "honk-server";
+
+  nodes = {
+    machine = { pkgs, ... }: {
+      services.honk = {
+        enable = true;
+        host = "0.0.0.0";
+        port = 8080;
+        username = "username";
+        passwordFile = "${pkgs.writeText "honk-password" "secure"}";
+        servername = "servername";
+      };
+    };
+  };
+
+  testScript = ''
+    machine.start()
+    machine.wait_for_unit("honk.service")
+    machine.wait_for_open_port(8080)
+
+    machine.stop_job("honk")
+    machine.wait_for_closed_port(8080)
+
+    machine.start_job("honk")
+    machine.wait_for_open_port(8080)
+  '';
+
+  meta.maintainers = [ lib.maintainers.drupol ];
+}

pkgs/servers/honk/default.nix

···
 , fetchurl
 , sqlite
 , installShellFiles
+, nixosTests
 }:
 
 buildGoModule rec {
···
     mv docs/{*.html,*.txt,*.jpg,*.png} $out/share/doc/${pname}
     mv views $out/share/${pname}
   '';
+
+  passthru.tests = {
+    inherit (nixosTests) honk;
+  };
 
   meta = {
     changelog = "https://humungus.tedunangst.com/r/honk/v/v${version}/f/docs/changelog.txt";