Dependency Management Toolkit for Google Cloud Python Projects

Version conflicts between dependencies has been a big issue for GCP Python users. The issue typically happens when a user depends on two libraries A and B, both of which depend on incompatible versions of library C. This can lead to non-deterministic behavior, since only one version of C actually gets loaded into the library.

This repository is providing a toolkit for GCP Python open source projects to bootstrap their development infrastructure, enforcing centralized dependency management, CI, and release process, thus ensuring compatibility across all of our GCP Python open source libraries for our end-users.

Compatibility Lib

Compatibility Lib is a library to get compatibility status and dependency information of Python packages. It contains three tools: compatibility checker, outdated dependency highlighter and deprecated dependency finder. And it also provides utilities to query data from the BigQuery tables (external user will need to set up tables with the same schema that this library is using).

Installation:

pip install compatibility-lib

Compatibility Checker

Compatibility checker gets the compatibility data by sending requests to the Compatibility Server endpoint, or by querying the BigQuery table (if the given package is listed in our configs, which are pre-computed).

Usage like below,

import itertools
from compatibility_lib import compatibility_checker

packages = ['package1', 'package2', 'package3']
package_pairs = itertools.combinations(packages, 2)
checker = compatibility_checker.CompatibilityChecker()

# Get self compatibility data
checker.get_self_compatibility(python_version='3', packages=packages)

# Get pairwise compatibility data
checker.get_pairwise_compatibility(
    python_version='3', pkg_sets=package_pairs)

Outdated Dependency Highlighter

Outdated Dependency Highlighter finds out the outdated dependencies of a Python package, and determines the priority of updating the dependency version based on a set of criteria below:

• Mark “High Priority” if dependencies have widely adopted major release. (e.g 1.0.0 -> 2.0.0)
• Mark “High Priority” if a new version has been available for more than 6 months.
• Mark “High Priority” if dependencies are 3 or more sub-versions behind the newest one. (e.g 1.0.0 -> 1.3.0)
• Mark “Low Priority” for other dependency updates.

Usage:

from compatibility_lib import dependency_highlighter

packages = ['package1', 'package2', 'package3']
highlighter = dependency_highlighter.DependencyHighlighter()
highlighter.check_packages(packages)

Deprecated Dependency Finder

Deprecated Dependency Finder can find out the deprecated dependencies that a Python package depends on.

Usage:

from compatibility_lib import deprecated_dep_finder

packages = ['package1', 'package2', 'package3']
finder = deprecated_dep_finder.DeprecatedDepFinder()
for res in finder.get_deprecated_deps(packages):
    print(res)

Badge Server

Displaying the compatibility status for your package as a Github Badge.

Types of badges

1. Self Compatibility
2. Compatibility with Google OSS Python packages
3. Dependency version status

Usage

See the usage here.

Contributing

Set up environment

• Set Up Python Environment

https://cloud.google.com/python/setup

• Install py 3.6 (may not be included in previous step)

sudo apt install python3.6

• Clone the cloud-opensource-python project and cd to project

git clone [email protected]:GoogleCloudPlatform/cloud-opensource-python.git
cd cloud-opensource-python

• Fork project and configure git remote settings

git remote add upstream [email protected]:GoogleCloudPlatform/cloud-opensource-python.git
git config --global user.email "[email protected]"

• Create a virtualenv, and source

tox -e py36
source .tox/py36/bin/activate

• Install gcloud SDK and initialize

curl https://sdk.cloud.google.com | bash
gcloud init

Set up credentials

• Create new service account key

1. In your browser, navigate to Cloud Console
2. menu > IAM & admin > Service accounts
3. under bigquery-admin, actions > create new key

• Set GOOGLE_APPLICATION_CREDENTIALS

export GOOGLE_APPLICATION_CREDENTIALS=”path/to/service/key.json”

Contributing to compatibility_lib

• Build compatibility_lib library from source and install

python compatibility_lib/setup.py bdist_wheel
pip install compatibility_lib/dist/*

Testing

We use nox test suite for running tests.

• Install Nox for testing

pip install nox-automation

• Run the tests

nox -s unit     # unit tests
nox -s lint     # linter
nox -s system   # system tests
nox -l          # see available options
nox             # run everything

License

Apache 2.0 - See LICENSE for more information.

Disclaimer

This is not an official Google product.