mirror of
https://github.com/hwchase17/langchain
synced 2024-11-18 09:25:54 +00:00
82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
import importlib
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from typing import Optional
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import typer
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from typing_extensions import Annotated
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from langchain_cli.namespaces import app as app_namespace
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from langchain_cli.namespaces import integration as integration_namespace
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from langchain_cli.namespaces import template as template_namespace
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from langchain_cli.utils.packages import get_langserve_export, get_package_root
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__version__ = "0.0.22rc0"
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app = typer.Typer(no_args_is_help=True, add_completion=False)
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app.add_typer(
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template_namespace.package_cli, name="template", help=template_namespace.__doc__
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)
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app.add_typer(app_namespace.app_cli, name="app", help=app_namespace.__doc__)
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app.add_typer(
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integration_namespace.integration_cli,
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name="integration",
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help=integration_namespace.__doc__,
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)
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# If libcst is installed, add the migrate namespace
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if importlib.util.find_spec("libcst"):
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from langchain_cli.namespaces.migrate import main as migrate_namespace
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app.add_typer(migrate_namespace.app, name="migrate", help=migrate_namespace.__doc__)
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def version_callback(show_version: bool) -> None:
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if show_version:
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typer.echo(f"langchain-cli {__version__}")
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raise typer.Exit()
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@app.callback()
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def main(
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version: bool = typer.Option(
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False,
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"--version",
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"-v",
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help="Print the current CLI version.",
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callback=version_callback,
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is_eager=True,
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),
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):
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pass
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@app.command()
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def serve(
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*,
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port: Annotated[
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Optional[int], typer.Option(help="The port to run the server on")
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] = None,
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host: Annotated[
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Optional[str], typer.Option(help="The host to run the server on")
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] = None,
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) -> None:
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"""
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Start the LangServe app, whether it's a template or an app.
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"""
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# see if is a template
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try:
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project_dir = get_package_root()
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pyproject = project_dir / "pyproject.toml"
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get_langserve_export(pyproject)
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except KeyError:
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# not a template
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app_namespace.serve(port=port, host=host)
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else:
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# is a template
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template_namespace.serve(port=port, host=host)
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if __name__ == "__main__":
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app()
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