chatgpt-retrieval-plugin: init module

nixos/modules/module-list.nix

···
   ./services/web-apps/calibre-web.nix
   ./services/web-apps/coder.nix
   ./services/web-apps/changedetection-io.nix
+  ./services/web-apps/chatgpt-retrieval-plugin.nix
   ./services/web-apps/cloudlog.nix
   ./services/web-apps/code-server.nix
   ./services/web-apps/convos.nix

nixos/modules/services/web-apps/chatgpt-retrieval-plugin.nix

···
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.chatgpt-retrieval-plugin;
+in
+{
+  options.services.chatgpt-retrieval-plugin = {
+    enable = mkEnableOption (lib.mdDoc "chatgpt-retrieval-plugin service");
+
+    port = mkOption {
+      type = types.port;
+      default = 8080;
+      description = lib.mdDoc "Port the chatgpt-retrieval-plugin service listens on.";
+    };
+
+    host = mkOption {
+      type = types.str;
+      default = "127.0.0.1";
+      example = "0.0.0.0";
+      description = lib.mdDoc "The hostname or IP address for chatgpt-retrieval-plugin to bind to.";
+    };
+
+    bearerTokenPath = mkOption {
+      type = types.path;
+      description = lib.mdDoc ''
+        Path to the secret bearer token used for the http api authentication.
+      '';
+      default = "";
+      example = "config.age.secrets.CHATGPT_RETRIEVAL_PLUGIN_BEARER_TOKEN.path";
+    };
+
+    openaiApiKeyPath = mkOption {
+      type = types.path;
+      description = lib.mdDoc ''
+        Path to the secret openai api key used for embeddings.
+      '';
+      default = "";
+      example = "config.age.secrets.CHATGPT_RETRIEVAL_PLUGIN_OPENAI_API_KEY.path";
+    };
+
+    datastore = mkOption {
+      type = types.enum [ "pinecone" "weaviate" "zilliz" "milvus" "qdrant" "redis" ];
+      default = "qdrant";
+      description = lib.mdDoc "This specifies the vector database provider you want to use to store and query embeddings.";
+    };
+
+    qdrantCollection = mkOption {
+      type = types.str;
+      description = lib.mdDoc ''
+        name of the qdrant collection used to store documents.
+      '';
+      default = "document_chunks";
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    assertions = [
+      {
+        assertion = cfg.bearerTokenPath != "";
+        message = "services.chatgpt-retrieval-plugin.bearerTokenPath should not be an empty string.";
+      }
+      {
+        assertion = cfg.openaiApiKeyPath != "";
+        message = "services.chatgpt-retrieval-plugin.openaiApiKeyPath should not be an empty string.";
+      }
+    ];
+
+    systemd.services.chatgpt-retrieval-plugin = {
+      description = "ChatGPT Retrieval Plugin";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        DynamicUser = true;
+        Restart = "always";
+        LoadCredential = [
+          "BEARER_TOKEN:${cfg.bearerTokenPath}"
+          "OPENAI_API_KEY:${cfg.openaiApiKeyPath}"
+        ];
+        StateDirectory = "chatgpt-retrieval-plugin";
+        StateDirectoryMode = "0755";
+      };
+
+      # it doesn't make sense to pass secrets as env vars, this is a hack until
+      # upstream has proper secret management.
+      script = ''
+        export BEARER_TOKEN=$(${pkgs.systemd}/bin/systemd-creds cat BEARER_TOKEN)
+        export OPENAI_API_KEY=$(${pkgs.systemd}/bin/systemd-creds cat OPENAI_API_KEY)
+        exec ${pkgs.chatgpt-retrieval-plugin}/bin/start --host ${cfg.host} --port ${toString cfg.port}
+      '';
+
+      environment = {
+        DATASTORE = cfg.datastore;
+        QDRANT_COLLECTION = mkIf (cfg.datastore == "qdrant") cfg.qdrantCollection;
+      };
+    };
+
+    systemd.tmpfiles.rules = [
+      # create the directory for static files for fastapi
+      "C /var/lib/chatgpt-retrieval-plugin/.well-known - - - - ${pkgs.chatgpt-retrieval-plugin}/${pkgs.python3Packages.python.sitePackages}/.well-known"
+    ];
+  };
+}

pkgs/servers/chatgpt-retrieval-plugin/default.nix

···
 , fetchFromGitHub
 , python3
 , nix-update-script
+, dasel
 }:
 
 python3Packages.buildPythonApplication {
···
     substituteInPlace pyproject.toml \
       --replace 'python-dotenv = "^0.21.1"' 'python-dotenv = "*"' \
       --replace 'python-multipart = "^0.0.6"' 'python-multipart = "^0.0.5"' \
-      --replace 'tiktoken = "^0.2.0"' 'tiktoken = "^0.3.0"'
+      --replace 'tiktoken = "^0.2.0"' 'tiktoken = "^0.3.0"' \
+      --replace 'packages = [{include = "server"}]' 'packages = [{include = "server"}, {include = "models"}, {include = "datastore"}, {include = "services"}]'
+
+    substituteInPlace server/main.py \
+      --replace 'directory=".well-known"' 'directory="/var/lib/chatgpt-retrieval-plugin/.well-known"' \
+      --replace '0.0.0.0' '127.0.0.1' \
+      --replace '8000' '8080'
+
+    ${dasel}/bin/dasel put -t string -f pyproject.toml -v '.well-known/*' '.tool.poetry.include.[]'
   '';
 
   nativeBuildInputs = with python3Packages; [
     poetry-core
   ];
-
 
   propagatedBuildInputs = with python3.pkgs; [
     fastapi