feat: autobrr

nixarr/autobrr/default.nix

@@ -0,0 +1,202 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.nixarr.autobrr;
+  nixarr = config.nixarr;
+  # Externalize username and group
+  user = "autobrr";
+  group = "autobrr";
+
+  # Define config format and template
+  configFormat = pkgs.formats.toml {};
+  configTemplate = configFormat.generate "autobrr.toml" cfg.settings;
+in {
+  options.nixarr.autobrr = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      example = true;
+      description = ''
+        Whether or not to enable the Autobrr service.
+
+        **Required options:** [`nixarr.enable`](#nixarr.enable)
+      '';
+    };
+
+    package = mkPackageOption pkgs "autobrr" {};
+
+    openFirewall = mkOption {
+      type = types.bool;
+      defaultText = literalExpression ''!nixarr.autobrr.vpn.enable'';
+      default = !cfg.vpn.enable;
+      example = true;
+      description = "Open firewall for the Autobrr port.";
+    };
+
+    vpn.enable = mkOption {
+      type = types.bool;
+      default = false;
+      example = true;
+      description = ''
+        **Required options:** [`nixarr.vpn.enable`](#nixarr.vpn.enable)
+
+        Route Autobrr traffic through the VPN.
+      '';
+    };
+
+    settings = lib.mkOption {
+      type = lib.types.submodule {freeformType = configFormat.type;};
+      default = {
+        host = "0.0.0.0";
+        port = 7474;
+        checkForUpdates = false;
+      };
+      example = {
+        logLevel = "DEBUG";
+      };
+      description = ''
+        Autobrr configuration options.
+
+        See https://autobrr.com/configuration/autobrr for more information.
+
+        `sessionSecret` is automatically generated upon first installation and will be overridden.
+      '';
+    };
+
+    stateDir = mkOption {
+      type = types.path;
+      default = "${nixarr.stateDir}/autobrr";
+      defaultText = literalExpression ''"''${nixarr.stateDir}/autobrr"'';
+      example = "/nixarr/.state/autobrr";
+      description = "The location of the state directory for the Autobrr service.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = cfg.vpn.enable -> nixarr.vpn.enable;
+        message = ''
+          The nixarr.autobrr.vpn.enable option requires the
+          nixarr.vpn.enable option to be set, but it was not.
+        '';
+      }
+      {
+        assertion = cfg.enable -> nixarr.enable;
+        message = ''
+          The nixarr.autobrr.enable option requires the nixarr.enable
+          option to be set, but it was not.
+        '';
+      }
+    ];
+
+    users = {
+      groups.${group} = {};
+      users.${user} = {
+        isSystemUser = true;
+        group = group;
+      };
+    };
+
+    # Create state directory with proper permissions
+    systemd.tmpfiles.rules = [
+      "d '${cfg.stateDir}' 0700 ${user} ${group} - -"
+    ];
+
+    # Configure the autobrr service
+    services.autobrr = {
+      enable = true;
+      package = cfg.package;
+      # We need to provide a secretFile even though we're handling it ourselves
+      secretFile = "/dev/null"; # This is a placeholder that won't be used
+      settings = mkMerge [
+        # User settings
+        cfg.settings
+        # Override host if VPN is enabled
+        (mkIf cfg.vpn.enable {host = "192.168.15.1";})
+      ];
+    };
+
+    # Override the autobrr service to use our state directory and session secret handling
+    systemd.services.autobrr = {
+      description = "Autobrr";
+      after = ["syslog.target" "network-online.target"];
+      wants = ["network-online.target"];
+      wantedBy = ["multi-user.target"];
+      path = [pkgs.openssl pkgs.dasel];
+
+      serviceConfig = {
+        Type = "simple";
+        User = user;
+        Group = "root";
+        UMask = 066;
+        DynamicUser = lib.mkForce false;
+        # disable state directory
+        StateDirectory = lib.mkForce null;
+        ExecStartPre = lib.mkForce (pkgs.writeShellScript "autobrr-config-prep" ''
+          # Generate session secret if it doesn't exist
+          SESSION_SECRET_FILE="${cfg.stateDir}/session-secret"
+          if [ ! -f "$SESSION_SECRET_FILE" ]; then
+            openssl rand -base64 32 > "$SESSION_SECRET_FILE"
+            chmod 600 "$SESSION_SECRET_FILE"
+          fi
+
+          # Create config with session secret
+          SESSION_SECRET=$(cat "$SESSION_SECRET_FILE")
+          cp '${configTemplate}' "${cfg.stateDir}/config.toml"
+          chmod 600 "${cfg.stateDir}/config.toml"
+          ${pkgs.dasel}/bin/dasel put -f "${cfg.stateDir}/config.toml" -v "$SESSION_SECRET" -o "${cfg.stateDir}/config.toml" "sessionSecret"
+        '');
+        ExecStart = lib.mkForce "${lib.getExe cfg.package} --config ${cfg.stateDir}";
+        Restart = "on-failure";
+      };
+
+      # Enable and specify VPN namespace to confine service in
+      vpnConfinement = mkIf cfg.vpn.enable {
+        enable = true;
+        vpnNamespace = "wg";
+      };
+    };
+
+    # Port mappings for VPN
+    vpnNamespaces.wg = mkIf cfg.vpn.enable {
+      portMappings = [
+        {
+          from = cfg.settings.port;
+          to = cfg.settings.port;
+        }
+      ];
+    };
+
+    # Nginx proxy for VPN-confined service
+    services.nginx = mkIf cfg.vpn.enable {
+      enable = true;
+      recommendedTlsSettings = true;
+      recommendedOptimisation = true;
+      recommendedGzipSettings = true;
+
+      virtualHosts."127.0.0.1:${builtins.toString cfg.settings.port}" = {
+        listen = [
+          {
+            addr = "0.0.0.0";
+            port = cfg.settings.port;
+          }
+        ];
+        locations."/" = {
+          recommendedProxySettings = true;
+          proxyWebsockets = true;
+          proxyPass = "http://192.168.15.1:${builtins.toString cfg.settings.port}";
+        };
+      };
+    };
+
+    # Open firewall ports if needed
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = [cfg.settings.port];
+    };
+  };
+}

nixarr/default.nix

@@ -81,6 +81,10 @@ with lib; let
         chown -R jellyseerr:root "${cfg.jellyseerr.stateDir}"
         find "${cfg.jellyseerr.stateDir}" \( -type d -exec chmod 0700 {} + -true \) -o \( -exec chmod 0600 {} + \)
       ''
+      + strings.optionalString cfg.autobrr.enable ''
+        chown -R autobrr:root "${cfg.autobrr.stateDir}"
+        find "${cfg.autobrr.stateDir}" \( -type d -exec chmod 0700 {} + -true \) -o \( -exec chmod 0600 {} + \)
+      ''
       + strings.optionalString cfg.recyclarr.enable ''
         chown -R recyclarr:root "${cfg.recyclarr.stateDir}"
         find "${cfg.recyclarr.stateDir}" \( -type d -exec chmod 0700 {} + -true \) -o \( -exec chmod 0600 {} + \)
@@ -88,6 +92,7 @@ with lib; let
   };
 in {
   imports = [
+    ./autobrr
     ./jellyfin
     ./jellyseerr
     ./plex
@@ -141,6 +146,7 @@ in {
         - [Sonarr](#nixarr.sonarr.enable)
         - [Transmission](#nixarr.transmission.enable)
         - [SABnzbd](#nixarr.sabnzbd.enable)
+        - [Autobrr](#nixarr.autobrr.enable)
 
         Remember to read the options.