async addMcpServer()

in packages/mcp-client/src/McpClient.ts [64:116]
49 lines of code
7 McCabe index (conditional complexity)

	async addMcpServer(server: ServerConfig | StdioServerParameters): Promise<void> {
		let transport: Transport;
		const asUrl = (url: string | URL): URL => {
			return typeof url === "string" ? new URL(url) : url;
		};

		if (!("type" in server)) {
			transport = new StdioClientTransport({
				...server,
				env: { ...server.env, PATH: process.env.PATH ?? "" },
			});
		} else {
			switch (server.type) {
				case "stdio":
					transport = new StdioClientTransport({
						...server.config,
						env: { ...server.config.env, PATH: process.env.PATH ?? "" },
					});
					break;
				case "sse":
					transport = new SSEClientTransport(asUrl(server.config.url), server.config.options);
					break;
				case "http":
					transport = new StreamableHTTPClientTransport(asUrl(server.config.url), server.config.options);
					break;
			}
		}
		const mcp = new Client({ name: "@huggingface/mcp-client", version: packageVersion });
		await mcp.connect(transport);

		const toolsResult = await mcp.listTools();
		debug(
			"Connected to server with tools:",
			toolsResult.tools.map(({ name }) => name)
		);

		for (const tool of toolsResult.tools) {
			this.clients.set(tool.name, mcp);
		}

		this.availableTools.push(
			...toolsResult.tools.map((tool) => {
				return {
					type: "function",
					function: {
						name: tool.name,
						description: tool.description,
						parameters: tool.inputSchema,
					},
				} satisfies ChatCompletionInputTool;
			})
		);
	}