sourcery 1.16.0

Magically refactor Python

Sourcery Command Line Interface

Installation and usage

Installation

Sourcery command line interface can be installed by running:

pip install sourcery

Login

Once installed you need to log in with:

sourcery login

which will open up a browser tab and ask for confirmation. This is only needed once per computer.

You can also log in via providing your token:

sourcery login --token YOUR_TOKEN

Usage

To review a file or a directory (recursively) with Sourcery, use the sourcery review command:

sourcery review example_file.py

To apply the changes suggested by Sourcery, use the --fix option:

sourcery review --fix {file_or_directory}

Command Line Options

Sourcery provides a few options for running. You can list them by running sourcery review --help

sourcery review --help


Usage: sourcery review [OPTIONS] [SRC]...

  Review SRC files/directories. Reads from stdin when SRC is -

Options:
  --diff TEXT               Run only on changed code with diff command (e.g.
                            "git diff")
  --enable TEXT             Only run the specified rule or tag. This option
                            can be used multiple times.
  --disable TEXT            Skip the specified rule or tag. This option can
                            be used multiple times.
  --check                   Return exit code 1 if unsolved issues found.
  --fix                     Automatically fix issues where possible.
  --config FILE             Location of the Sourcery YAML config file. Can be
                            a file or URL.
  --csv                     Output in CSV format
  --verbose                 Verbose output with explanation and code
                            snippets.
  --summary / --no-summary  Flag to determine whether to print a summary of
                            the review. Default: true.
  -h, --help                Show this message and exit.

Configuration

Sourcery reads configuration settings from .sourcery.yaml in the project directory. Full details are described here.

Pre-commit Hook

Sourcery works great with pre-commit. Once you have it installed, add this to the .pre-commit-config.yaml in your repository:

repos:
  - repo: https://github.com/sourcery-ai/sourcery
    rev: v1.16.0
    hooks:
      - id: sourcery
        # The best way to use Sourcery in a pre-commit hook:
        # * review only changed lines:
        # * omit the summary
        args: [--diff=git diff HEAD, --no-summary]

To review all changes compared to the main branch:

args: [--diff=git diff main]

If you want Sourcery to automatically apply the suggested changes,add the --fix option:

args: [--diff=git diff HEAD, --fix]

If Sourcery is the first pre-commit hook that you've added to your project, you'll also need to run pre-commit install.

Continuous Integration

For the majority of projects, the best usage of Sourcery in the CI is to review only the code of the current PR.

You can use the script below to detect Sourcery violations that are present in the current code but not in the main branch:

pip install sourcery
# Store your Sourcery token as a secret in your CI environment.
sourcery login --token $SOURCERY_TOKEN
sourcery review --diff "git diff main" .

Instead of main, you can pick another branch as well. For example, in GitHub Actions you can use --diff="git diff ${{ github.event.pull_request.base.sha }}"