nixos/meilisearch: init

Reviewed-by: Aaron Andersen <aanderse@users.noreply.github.com>
(cherry picked from commit 5844ea85c3)

nixos/modules/module-list.nix

@@ -899,6 +899,7 @@
   ./services/search/elasticsearch-curator.nix
   ./services/search/hound.nix
   ./services/search/kibana.nix
+  ./services/search/meilisearch.nix
   ./services/search/solr.nix
   ./services/security/certmgr.nix
   ./services/security/cfssl.nix

nixos/modules/services/search/meilisearch.nix

@@ -0,0 +1,83 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.meilisearch;
+
+in {
+
+  meta.maintainers = with maintainers; [ filalex77 ];
+
+  ###### interface
+
+  options.services.meilisearch = {
+    enable = mkEnableOption "MeiliSearch - a RESTful search API";
+
+    listenAddress = mkOption {
+      description = "MeiliSearch listen address.";
+      default = "127.0.0.1";
+      type = types.str;
+    };
+
+    listenPort = mkOption {
+      description = "MeiliSearch port to listen on.";
+      default = 7700;
+      type = types.port;
+    };
+
+    environment = mkOption {
+      description = "Defines the running environment of MeiliSearch.";
+      default = "development";
+      type = types.enum [ "development" "production" ];
+    };
+
+    masterKeyFile = mkOption {
+      description = ''
+        Path to file which contains the master key.
+        By doing so, all routes will be protected and will require a key to be accessed.
+        If no master key is provided, all routes can be accessed without requiring any key.
+      '';
+      default = null;
+      type = with types; nullOr path;
+    };
+
+    noAnalytics = mkOption {
+      description = ''
+        Deactivates analytics.
+        Analytics allow MeiliSearch to know how many users are using MeiliSearch,
+        which versions and which platforms are used.
+        This process is entirely anonymous.
+      '';
+      default = false;
+      type = types.bool;
+    };
+
+  };
+
+  ###### implementation
+  
+  config = mkIf cfg.enable {
+    systemd.services.meilisearch = {
+      description = "MeiliSearch daemon";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      environment = let
+        masterKey = mkIf (cfg.masterKeyFile != null) (builtins.readFile cfg.masterKeyFile);
+      in {
+        MEILI_DB_PATH = "/var/lib/meilisearch";
+        MEILI_HTTP_ADDR = "${cfg.listenAddress}:${toString cfg.listenPort}";
+        MEILI_MASTER_KEY = masterKey;
+        MEILI_NO_ANALYTICS = toString cfg.noAnalytics;
+        MEILI_ENV = cfg.environment;
+      };
+      serviceConfig = {
+        ExecStart = "${pkgs.meilisearch}/bin/meilisearch";
+        DynamicUser = true;
+        StateDirectory = "meilisearch";
+      };
+    };
+
+    environment.systemPackages = [ pkgs.meilisearch ];
+  };
+}