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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 documents

The following is a set of guidelines for contributing.

This guideline is for new beginners of 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
    # 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
    $ git fetch fork
    where fork is the remote name of the fork repository.

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

To update master branch to date:

$ git pull origin master
# In rare cases that your local master branch diverges from the remote master:
$ git fetch origin && git reset --hard master
2. Create a new branch based on the up-to-date master for new patches. 3. Create a Pull Request from that patch branch.

Local development#

To make sure the tests suites can run rightly, you need to install Git LFS, then

$ git lfs install
# If you have already cloned the repository, execute the below command as well.
$ git lfs pull

Then, you need to install base dependencies in a venv. Although PDM uses local package directory to install dependencies, venv is still needed to start up PDM at the first time:

$ python

Now, all dependencies are installed into local __pypackages__ directory, which will be used for development after this point. The pdm executable located at __pypackages__/<VERSION>/bin can be run directly from outside, which is installed in editable mode, or you can use python -m pdm from inside the venv.

Run tests#

$ pdm run test

The test suite is still simple and requires to be supplied, please help write more test cases.

Code style#

PDM uses pre-commit for linting, you need to install pre-commit first, then:

$ pre-commit install
$ pdm run lint

PDM uses black coding 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.

Preview the documentation#

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

$ pdm run doc