With the release of pyenv v2.0.0 there is a breaking change around startup logic that necessitates an update for our pyenv setup instructions. Also add a statement about how to get configuration instructions from pyenv itself.
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Welcome
We're so glad you're thinking about contributing to this open source project! If you're unsure or afraid of anything, just ask or submit the issue or pull request anyway. The worst that can happen is that you'll be politely asked to change something. We appreciate any sort of contribution, and don't want a wall of rules to get in the way of that.
Before contributing, we encourage you to read our CONTRIBUTING policy (you are here), our LICENSE, and our README, all of which should be in this repository.
Issues
If you want to report a bug or request a new feature, the most direct method is to create an issue in this repository. We recommend that you first search through existing issues (both open and closed) to check if your particular issue has already been reported. If it has then you might want to add a comment to the existing issue. If it hasn't then feel free to create a new one.
Pull requests
If you choose to submit a pull request, you will notice that our continuous integration (CI) system runs a fairly extensive set of linters and syntax checkers. Your pull request may fail these checks, and that's OK. If you want you can stop there and wait for us to make the necessary corrections to ensure your code passes the CI checks.
If you want to make the changes yourself, or if you want to become a regular contributor, then you will want to set up pre-commit on your local machine. Once you do that, the CI checks will run locally before you even write your commit message. This speeds up your development cycle considerably.
Setting up pre-commit
There are a few ways to do this, but we prefer to use
pyenv
and
pyenv-virtualenv
to
create and manage a Python virtual environment specific to this
project.
If you already have pyenv
and pyenv-virtualenv
configured you can
take advantage of the setup-env
tool in this repo to automate the
entire environment configuration process.
./setup-env
Otherwise, follow the steps below to manually configure your environment.
Installing and using pyenv
and pyenv-virtualenv
On the Mac, we recommend installing brew. Then
installation is as simple as brew install pyenv pyenv-virtualenv
and
adding this to your profile:
export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init --path)"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
For Linux, Windows Subsystem for Linux (WSL), or on the Mac (if you
don't want to use brew
) you can use
pyenv/pyenv-installer to
install the necessary tools. Before running this ensure that you have
installed the prerequisites for your platform according to the
pyenv
wiki
page.
On WSL you should treat your platform as whatever Linux distribution you've chosen to install.
Once you have installed pyenv
you will need to add the following
lines to your .bash_profile
(or .profile
):
export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init --path)"
and then add the following lines to your .bashrc
:
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
If you want more information about setting up pyenv
once installed, please run
pyenv init
and
pyenv virtualenv-init
for the current configuration instructions.
If you are using a shell other than bash
you should follow the
instructions that the pyenv-installer
script outputs.
You will need to reload your shell for these changes to take effect so
you can begin to use pyenv
.
For a list of Python versions that are already installed and ready to
use with pyenv
, use the command pyenv versions
. To see a list of
the Python versions available to be installed and used with pyenv
use the command pyenv install --list
. You can read more
here about
the many things that pyenv
can do. See
here for the
additional capabilities that pyenv-virtualenv adds to the pyenv
command.
Creating the Python virtual environment
Once pyenv
and pyenv-virtualenv
are installed on your system, you
can create and configure the Python virtual environment with these
commands:
cd skeleton-generic
pyenv virtualenv <python_version_to_use> skeleton-generic
pyenv local skeleton-generic
pip install --requirement requirements-dev.txt
Installing the pre-commit hook
Now setting up pre-commit is as simple as:
pre-commit install
At this point the pre-commit checks will run against any files that
you attempt to commit. If you want to run the checks against the
entire repo, just execute pre-commit run --all-files
.
Public domain
This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.
All contributions to this project will be released under the CC0 dedication. By submitting a pull request, you are agreeing to comply with this waiver of copyright interest.