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CONTRIBUTING.md

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Contributing to PDM

First off, thanks for taking the time to contribute! Contributions include but are not restricted to:

  • Reporting bugs
  • Contributing to code
  • Writing tests
  • Writing documentation

The following is a set of guidelines for contributing.

A recommended flow of contributing to an Open Source project

This section is for beginners to OSS. If you are an experienced OSS developer, you can skip this section.

  1. First, fork this project to your own namespace using the fork button at the top right of the repository page.
  2. Clone the upstream repository to local: 
    git clone https://github.com/pdm-project/pdm.git
# Or if you prefer SSH clone:
git clone [email protected]:pdm-project/pdm.git
  3. Add the fork as a new remote: 
    git remote add fork https://github.com/yourname/pdm.git
git fetch fork
    where fork is the remote name of the fork repository.

ProTips:

  1. Don't modify code on the main branch, the main branch should always keep track of origin/main.

    To update main branch to date:

    git pull origin main
# In rare cases that your local main branch diverges from the remote main:
git fetch origin && git reset --hard main

  2. Create a new branch based on the up-to-date main branch for new patches.

  3. Create a Pull Request from that patch branch.

Local development

You will need to install base dependencies in a venv. Make sure your pip is newer than 21.3 to install PDM in develop/editable mode.

python -m pip install -U "pip>=21.3"
python -m pip install -e .

You are free to create a virtualenv with either venv module or virtualenv tool for the development. If you are doing so, you may also need to set pdm config python.use_venv true after installation is done.

Now, all dependencies are installed into the Python environment you choose, which will be used for development after this point.

Run tests

pdm run test

The test suite is still simple and needs expansion! Please help write more test cases.

!!! note You can also run your test suite against all supported Python version using tox with the tox-pdm plugin. You can either run it by yourself with:

```shell
tox
```

or from `pdm` with:

```shell
pdm run tox
```

Code style

PDM uses pre-commit for linting. Install pre-commit first, then:

pre-commit install
pdm run lint

PDM uses black for code style and isort for sorting import statements. If you are not following them, the CI will fail and your Pull Request will not be merged.

News fragments

When you make changes such as fixing a bug or adding a feature, you must add a news fragment describing your change. News fragments are placed in the news/ directory, and should be named according to this pattern: <issue_num>.<issue_type>.md (e.g., 566.bugfix.md).

Issue Types

  • feature: Features and improvements
  • bugfix: Bug fixes
  • refactor: Code restructures
  • doc: Added or improved documentation
  • dep: Changes to dependencies
  • removal: Removals or deprecations in the API
  • misc: Miscellaneous changes that don't fit any of the other categories

The contents of the file should be a single sentence in the imperative mood that describes your changes. (e.g., Deduplicate the plugins list. ) See entries in the Change Log for more examples.

Preview the documentation

If you make some changes to the docs/ and you want to preview the build result, simply do:

pdm run doc

Release

Once all changes are done and ready to release, you can preview the changelog contents by running:

pdm run release --dry-run

Make sure the next version and the changelog are as expected in the output.

Then cut a release on the main branch:

pdm run release

GitHub action will create the release and upload the distributions to PyPI.

Read more options about version bumping by pdm run release --help.