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This PR aims to reduce import time of `langchain-core` tools by removing the `importlib.metadata` import previously used in `__init__.py`. This is the first in a sequence of PRs to reduce import time delays for `langchain-core` features and structures 🚀. Because we're now hard coding the version, we need to make sure `version.py` and `pyproject.toml` stay in sync, so I've added a new CI job that runs whenever either of those files are modified. [This run](https://github.com/langchain-ai/langchain/actions/runs/14358012706/job/40251952044?pr=30744) demonstrates the failure that occurs whenever the version gets out of sync (thus blocking a PR). Before, note the ~15% of time spent on the `importlib.metadata` /related imports <img width="1081" alt="Screenshot 2025-04-09 at 9 06 15 AM" src="https://github.com/user-attachments/assets/59f405ec-ee8d-4473-89ff-45dea5befa31" /> After (note, lack of `importlib.metadata` time sink): <img width="1245" alt="Screenshot 2025-04-09 at 9 01 23 AM" src="https://github.com/user-attachments/assets/9c32e77c-27ce-485e-9b88-e365193ed58d" />
30 lines
929 B
YAML
30 lines
929 B
YAML
name: Check `langchain-core` version equality
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on:
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pull_request:
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paths:
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- 'libs/core/pyproject.toml'
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- 'libs/core/langchain_core/version.py'
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jobs:
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check_version_equality:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- name: Check version equality
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run: |
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PYPROJECT_VERSION=$(grep -Po '(?<=^version = ")[^"]*' libs/core/pyproject.toml)
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VERSION_PY_VERSION=$(grep -Po '(?<=^VERSION = ")[^"]*' libs/core/langchain_core/version.py)
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# Compare the two versions
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if [ "$PYPROJECT_VERSION" != "$VERSION_PY_VERSION" ]; then
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echo "langchain-core versions in pyproject.toml and version.py do not match!"
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echo "pyproject.toml version: $PYPROJECT_VERSION"
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echo "version.py version: $VERSION_PY_VERSION"
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exit 1
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else
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echo "Versions match: $PYPROJECT_VERSION"
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fi
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