parsoid: add service

nixos/modules/module-list.nix

@@ -189,6 +189,7 @@
   ./services/misc/nix-gc.nix
   ./services/misc/nixos-manual.nix
   ./services/misc/nix-ssh-serve.nix
+  ./services/misc/parsoid.nix
   ./services/misc/phd.nix
   ./services/misc/redmine.nix
   ./services/misc/rippled.nix

nixos/modules/services/misc/parsoid.nix

@@ -0,0 +1,100 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.parsoid;
+
+  conf = ''
+    exports.setup = function( parsoidConfig ) {
+      ${toString (mapAttrsToList (name: str: "parsoidConfig.setInterwiki('${name}', '${str}');") cfg.interwikis)}
+
+      parsoidConfig.serverInterface = "${cfg.interface}";
+      parsoidConfig.serverPort = ${toString cfg.port};
+
+      parsoidConfig.useSelser = true;
+
+      ${cfg.extraConfig}
+    };
+  '';
+
+  confFile = builtins.toFile "localsettings.js" conf;
+
+in
+{
+  ##### interface
+
+  options = {
+
+    services.parsoid = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to enable Parsoid -- bidirectional
+          wikitext parser.
+        '';
+      };
+
+      interwikis = mkOption {
+        type = types.attrsOf types.str;
+        example = { localhost = "http://localhost/api.php"; };
+        description = ''
+          Used MediaWiki API endpoints.
+        '';
+      };
+
+      workers = mkOption {
+        type = types.int;
+        default = 2;
+        description = ''
+          Number of Parsoid workers.
+        '';
+      };
+
+      interface = mkOption {
+        type = types.str;
+        default = "127.0.0.1";
+        description = ''
+          Interface to listen on.
+        '';
+      };
+
+      port = mkOption {
+        type = types.int;
+        default = 8000;
+        description = ''
+          Port to listen on.
+        '';
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = ''
+          Extra configuration to add to parsoid configuration.
+        '';
+      };
+
+    };
+
+  };
+
+  ##### implementation
+
+  config = mkIf cfg.enable {
+
+    systemd.services.parsoid = {
+      description = "Bidirectional wikitext parser";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        ExecStart = "${pkgs.nodePackages.parsoid}/lib/node_modules/parsoid/api/server.js -c ${confFile} -n ${toString cfg.workers}";
+      };
+    };
+
+  };
+
+}