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Contributing ============ urllib3 is a community-maintained project and we happily accept contributions. If you wish to add a new feature or fix a bug: #. `Check for open issues <https://github.com/urllib3/urllib3/issues>`_ or open a fresh issue to start a discussion around a feature idea or a bug. There is a *Contributor Friendly* tag for issues that should be ideal for people who are not very familiar with the codebase yet. #. Fork the `urllib3 repository on Github <https://github.com/urllib3/urllib3>`_ to start making your changes. #. Write a test which shows that the bug was fixed or that the feature works as expected. #. Format your changes with black using command ``nox -rs format`` and lint your changes using command ``nox -rs lint``. #. Add a `changelog entry <https://github.com/urllib3/urllib3/blob/main/changelog/README.rst>`__. #. Send a pull request and bug the maintainer until it gets merged and published. Setting up your development environment --------------------------------------- In order to setup the development environment all that you need is `nox <https://nox.thea.codes/en/stable/index.html>`_ installed in your machine:: $ python -m pip install --user --upgrade nox Running the tests ----------------- We use some external dependencies, multiple interpreters and code coverage analysis while running test suite. Our ``noxfile.py`` handles much of this for you:: $ nox --reuse-existing-virtualenvs --sessions test-3.12 test-pypy3.10 [ Nox will create virtualenv if needed, install the specified dependencies, and run the commands in order.] Note that for nox to test different interpreters, the interpreters must be on the ``PATH`` first. Check with ``which`` to see if the interpreter is on the ``PATH`` like so:: $ which python3.12 ~/.pyenv/versions/3.12.1/bin/python3.12 $ which pypy3.10 ~/.pyenv/versions/pypy3.10-7.3.13/bin/pypy3.10 There is also a nox command for running all of our tests and multiple python versions.:: $ nox --reuse-existing-virtualenvs --sessions test Note that code coverage less than 100% is regarded as a failing run. Some platform-specific tests are skipped unless run in that platform. To make sure the code works in all of urllib3's supported platforms, you can run our ``nox`` suite:: $ nox --reuse-existing-virtualenvs --sessions test [ Nox will create virtualenv if needed, install the specified dependencies, and run the commands in order.] ....... ....... nox > Session test-3.8 was successful. nox > Session test-3.9 was successful. nox > Session test-3.10 was successful. nox > Session test-3.11 was successful. nox > Session test-3.12 was successful. nox > Session test-3.13 was successful. nox > Session test-pypy was successful. Our test suite `runs continuously on GitHub Actions <https://github.com/urllib3/urllib3/actions>`_ with every pull request. To run specific tests or quickly re-run without nox recreating the env, do the following:: $ nox --reuse-existing-virtualenvs --sessions test-3.8 -- pyTestArgument1 pyTestArgument2 pyTestArgumentN [ Nox will create virtualenv, install the specified dependencies, and run the commands in order.] nox > Running session test-3.8 nox > Re-using existing virtual environment at .nox/test-3-8. ....... ....... nox > Session test-3.8 was successful. After the ``--`` indicator, any arguments will be passed to pytest. To specify an exact test case the following syntax also works: ``test/dir/module_name.py::TestClassName::test_method_name`` (eg.: ``test/with_dummyserver/test_https.py::TestHTTPS::test_simple``). The following argument is another valid example to pass to pytest: ``-k test_methode_name``. These are useful when developing new test cases and there is no point re-running the entire test suite every iteration. It is also possible to further parameterize pytest for local testing. For all valid arguments, check `the pytest documentation <https://docs.pytest.org/en/stable/usage.html#stopping-after-the-first-or-n-failures>`_. Getting paid for your contributions ----------------------------------- urllib3 has a `pool of money hosted on Open Collective <https://opencollective.com/urllib3#category-BUDGET>`_ which the team uses to pay contributors for their work. **That could be you, too!** If you complete all tasks in an issue that is marked with the `"💰 Bounty $X00" label <https://github.com/urllib3/urllib3/issues?q=is%3Aopen+is%3Aissue+label%3A%22%F0%9F%92%B0+Bounty+%24100%22%2C%22%F0%9F%92%B0+Bounty+%24200%22%2C%22%F0%9F%92%B0+Bounty+%24300%22%2C%22%F0%9F%92%B0+Bounty+%24400%22%2C%22%F0%9F%92%B0+Bounty+%24500%22+no%3Aassignee>`_ then you're eligible to be paid for your work. - Ensure that you're able to `receive funds from Open Collective for working on OSS <https://docs.opencollective.com/help/expenses-and-getting-paid/submitting-expenses>`_. Consider your employment contract and taxes for possible restrictions. - If an issue is already assigned to someone on GitHub then it's likely they've made substantial progress on the issue and will be given the bounty. If you're interested in bounties you should look for issues which aren't assigned to anyone. - **Don't "claim" issues or ask whether someone is already working on an issue.** Instead, focus on researching and working on the tasks in the issue. Once you have made considerable progress on the tasks in an issue we can assign your account to the issue to ensure others don't start working on it in parallel. - If you've been assigned to an issue and haven't made progress or given an update in over a week you will be unassigned from the issue to allow others a chance at solving the issue. - The amount you will be paid for the completing an issue is shown in the label (either $100, $200, $300, etc). - If you have questions about how to create an invoice on Open Collective `try reading their FAQ <https://docs.opencollective.com/help/expenses-and-getting-paid/expenses>`_. - If you have a proposal to work on urllib3 that's not listed in the issue tracker please open an issue with your proposal and our team will discuss whether we'd pay for your work on your proposal. - If you have other questions get in contact with a maintainer in the `urllib3 Discord channel <https://discord.gg/urllib3>`_ or via email. - The list above isn't an exhaustive list of criteria or rules for how/when money is distributed. **The final say on whether money will be distributed is up to maintainers.** This program is an experiment so if you have positive or negative feedback on the process you can contact the maintainers through one of the above channels. Note that this program isn't a "bug bounty" program, we don't distribute funds to reporters of bugs or security vulnerabilities at this time. Running local proxies --------------------- If the feature you are developing involves a proxy, you can rely on scripts we have developed to run a proxy locally. Run an HTTP proxy locally: .. code-block:: bash $ python -m dummyserver.proxy Run an HTTPS proxy locally: .. code-block:: bash $ python -m dummyserver.https_proxy Contributing to documentation ----------------------------- You can build the docs locally using ``nox``: .. code-block:: bash $ nox -rs docs While writing documentation you should follow these guidelines: - Use the top-level ``urllib3.request()`` function for smaller code examples. For more involved examples use PoolManager, etc. - Use double quotes for all strings. (Output, Declaration etc.) - Use keyword arguments everywhere except for method and url. (ie ``http.request("GET", "https://example.com", headers={...})`` ) - Use HTTPS in URLs everywhere unless HTTP is needed. - Rules for code examples and naming variables: - ``PoolManager`` instances should be named ``http``. (ie ``http = urllib3.PoolManager(...)``) - ``ProxyManager`` instances should be named ``proxy``. - ``ConnectionPool`` instances should be named ``pool``. - ``Connection`` instances should be named ``conn``. - ``HTTPResponse`` instances should be named ``resp``. - Only use ``example.com`` or ``httpbin.org`` for example URLs - Comments within snippets should be useful, if what's being done is apparent (such as parsing JSON, making a request) then it can be skipped for that section. - Comments should always go above a code section rather than below with the exception of print statements where the comment containing the result goes below. - Imports should be their own section separated from the rest of the example with a line of whitespace. - Imports should minimized if possible. Use import urllib3 instead of from urllib3 import X. - Sort imports similarly to isort, standard library first and third-party (like urllib3) come after. - No whitespace is required between the sections as normally would be in case of isort. - Add print statements along with a comment below them showing the output, potentially compressed. - This helps users using the copy-paste button immediately see the results from a script. Releases -------- A release candidate can be created by any contributor. - Announce intent to release on Discord, see if anyone wants to include last minute changes. - Run ``towncrier build`` to update ``CHANGES.rst`` with the release notes, adjust as necessary. - Update ``urllib3/__init__.py`` with the proper version number - Commit the changes to a ``release-X.Y.Z`` branch. - Create a pull request and append ``&expand=1&template=release.md`` to the URL before submitting in order to include our release checklist in the pull request description. - Follow the checklist!