prefect-github¶

Prefect-github makes it easy to interact with GitHub repositories and credentials.

Getting started¶

Prerequisites¶

Prefect installed.
A GitHub account.

Install prefect-github for Prefect 2¶

pip install 'prefect[github]<3'

Register newly installed block types¶

Register the block types in the prefect-github module to make them available for use.

prefect block register -m prefect_github

Examples¶

In the examples below, you create blocks with Python code. Alternatively, blocks can be created through the Prefect UI.

To create a deployment and run a deployment where the flow code is stored in a private GitHub repository, you can use the GitHubCredentials block.

A deployment can use flow code stored in a GitHub repository without using this library in either of the following cases:

The repository is public
The deployment uses a Secret block to store the token

Code to create a GitHub Credentials block:

from prefect_github import GitHubCredentials

github_credentials_block = GitHubCredentials(token="my_token")
github_credentials_block.save(name="my-github-credentials-block")

Access flow code stored in a private GitHub repository in a deployment¶

Use the credentials block you created above to pass the GitHub access token during deployment creation. The code below assumes there's flow code stored in a private GitHub repository.

from prefect import flow
from prefect.runner.storage import GitRepository
from prefect_github import GitHubCredentials


if __name__ == "__main__":
    flow.from_source(
        source=GitRepository(
        url="https://github.com/org/private-repo.git",
        credentials=GitHubCredentials.load("my-github-credentials-block")
    ),
    entrypoint="my_file.py:my_flow",
    ).deploy(
        name="private-github-deploy",
        work_pool_name="my_pool",
        build=False
    )

Alternatively, if you use a prefect.yaml file to create the deployment, reference the GitHub Credentials block in the pull step:

pull:
    - prefect.deployments.steps.git_clone:
        repository: https://github.com/org/repo.git
        credentials: "{{ prefect.blocks.github-credentials.my-github-credentials-block }}"

Interact with a GitHub repository¶

You can use prefect-github to create and retrieve issues and PRs from a repository. Here's an example of adding a star to a GitHub repository:

from prefect import flow
from prefect_github import GitHubCredentials
from prefect_github.repository import query_repository
from prefect_github.mutations import add_star_starrable


@flow()
def github_add_star_flow():
    github_credentials = GitHubCredentials.load("github-token")
    repository_id = query_repository(
        "PrefectHQ",
        "Prefect",
        github_credentials=github_credentials,
        return_fields="id"
    )["id"]
    starrable = add_star_starrable(
        repository_id,
        github_credentials
    )
    return starrable


if __name__ == "__main__":
    github_add_star_flow()

Resources¶

For assistance using GitHub, consult the GitHub documentation.

Refer to the prefect-github API documentation linked in the sidebar to explore all the capabilities of the prefect-github library.