mirror of
https://github.com/hwchase17/langchain.git
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75 lines
2.5 KiB
Python
75 lines
2.5 KiB
Python
"""Migrate LangChain to the most recent version."""
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from pathlib import Path
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import rich
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import typer
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from gritql import run # type: ignore
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from typer import Option
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def get_gritdir_path() -> Path:
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"""Get the path to the grit directory."""
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script_dir = Path(__file__).parent
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return script_dir / ".grit"
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def migrate(
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ctx: typer.Context,
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# Using diff instead of dry-run for backwards compatibility with the old CLI
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diff: bool = Option(
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False,
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"--diff",
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help="Show the changes that would be made without applying them.",
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),
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interactive: bool = Option(
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False,
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"--interactive",
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help="Prompt for confirmation before making each change",
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),
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) -> None:
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"""Migrate langchain to the most recent version.
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Any undocumented arguments will be passed to the Grit CLI.
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"""
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rich.print(
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"✈️ This script will help you migrate to a LangChain 0.3. "
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"This migration script will attempt to replace old imports in the code "
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"with new ones. "
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"If you need to migrate to LangChain 0.2, please downgrade to version 0.0.29 "
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"of the langchain-cli.\n\n"
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"🔄 You will need to run the migration script TWICE to migrate (e.g., "
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"to update llms import from langchain, the script will first move them to "
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"corresponding imports from the community package, and on the second "
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"run will migrate from the community package to the partner package "
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"when possible). \n\n"
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"🔍 You can pre-view the changes by running with the --diff flag. \n\n"
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"🚫 You can disable specific import changes by using the --disable "
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"flag. \n\n"
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"📄 Update your pyproject.toml or requirements.txt file to "
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"reflect any imports from new packages. For example, if you see new "
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"imports from langchain_openai, langchain_anthropic or "
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"langchain_text_splitters you "
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"should them to your dependencies! \n\n"
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'⚠️ This script is a "best-effort", and is likely to make some '
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"mistakes.\n\n"
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"🛡️ Backup your code prior to running the migration script -- it will "
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"modify your files!\n\n"
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)
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rich.print("-" * 10)
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rich.print()
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args = list(ctx.args)
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if interactive:
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args.append("--interactive")
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if diff:
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args.append("--dry-run")
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final_code = run.apply_pattern(
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"langchain_all_migrations()",
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args,
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grit_dir=get_gritdir_path(),
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)
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raise typer.Exit(code=final_code)
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