CLI 0.0.13, Configurable Template Demo (#12796)

libs/cli/langchain_cli/cli.py

@@ -6,7 +6,7 @@ from typing_extensions import Annotated
 from langchain_cli.namespaces import app as app_namespace
 from langchain_cli.namespaces import template as template_namespace
 
-__version__ = "0.0.12"
+__version__ = "0.0.13"
 
 app = typer.Typer(no_args_is_help=True, add_completion=False)
 app.add_typer(

libs/cli/langchain_cli/dev_scripts.py

@@ -2,6 +2,8 @@
 Development Scripts for template packages
 """
 
+from typing import Sequence
+
 from fastapi import FastAPI
 from langserve import add_routes
 from langserve.packages import get_langserve_export
@@ -9,7 +11,10 @@ from langserve.packages import get_langserve_export
 from langchain_cli.utils.packages import get_package_root
 
 
-def create_demo_server():
+def create_demo_server(
+    *,
+    config_keys: Sequence[str] = (),
+):
     """
     Creates a demo server for the current template.
     """
@@ -22,10 +27,18 @@ def create_demo_server():
         mod = __import__(package["module"], fromlist=[package["attr"]])
 
         chain = getattr(mod, package["attr"])
-        add_routes(app, chain)
+        add_routes(
+            app,
+            chain,
+            config_keys=config_keys,
+        )
     except KeyError as e:
         raise KeyError("Missing fields from pyproject.toml") from e
     except ImportError as e:
         raise ImportError("Could not import module defined in pyproject.toml") from e
 
     return app
+
+
+def create_demo_server_configurable():
+    return create_demo_server(config_keys=["configurable"])

libs/cli/langchain_cli/namespaces/template.py

@@ -90,6 +90,13 @@ def serve(
     host: Annotated[
         Optional[str], typer.Option(help="The host to run the server on")
     ] = None,
+    configurable: Annotated[
+        bool,
+        typer.Option(
+            "--configurable/--no-configurable",
+            help="Whether to include a configurable route",
+        ),
+    ] = True,
 ) -> None:
     """
     Starts a demo app for this template.
@@ -104,10 +111,16 @@ def serve(
     port_str = str(port) if port is not None else "8000"
     host_str = host if host is not None else "127.0.0.1"
 
+    script = (
+        "langchain_cli.dev_scripts:create_demo_server"
+        if not configurable
+        else "langchain_cli.dev_scripts:create_demo_server_configurable"
+    )
+
     command = [
         "uvicorn",
         "--factory",
-        "langchain_cli.dev_scripts:create_demo_server",
+        script,
         "--reload",
         "--port",
         port_str,

libs/cli/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "langchain-cli"
-version = "0.0.12"
+version = "0.0.13"
 description = "CLI for interacting with LangChain"
 authors = ["Erick Friis <erick@langchain.dev>"]
 readme = "README.md"