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Modulus (Beta) Contribution Guide

Introduction

Welcome to Project Modulus! We're excited you're here and want to contribute. This documentation is intended for individuals and institutions interested in contributing to Modulus. Modulus is an open-source project and, as such, its success relies on its community of contributors willing to keep improving it. Your contribution will be a valued addition to the code base; we simply ask that you read this page and understand our contribution process, whether you are a seasoned open-source contributor or whether you are a first-time contributor.

Communicate with us

We are happy to talk with you about your needs for Modulus and your ideas for contributing to the project. One way to do this is to create an issue discussing your thoughts. It might be that a very similar feature is under development or already exists, so an issue is a great starting point. If you are looking for an issue to resolve that will help, refer to the issue section.

Contribute to Modulus-Symbolic

Pull Requests

Developer workflow for code contributions is as follows:

  1. Developers must first fork the upstream Modulus repository.

  2. Git clone the forked repository and push changes to the personal fork.

  3. Once the code changes are staged on the fork and ready for review, a Pull Request (PR) can be requested to merge the changes from a branch of the fork into a selected branch of upstream.

    • Exercise caution when selecting the source and target branches for the PR.

    • Creation of a PR creation kicks off CI and a code review process.

    • Atleast one Modulus engineer will be assigned for the review.

  4. The PR will be accepted and the corresponding issue closed after adequate review and testing has been completed.

Licensing Information

All source code files should start with this paragraph:

# SPDX-FileCopyrightText: Copyright (c) 2023 - 2024 NVIDIA CORPORATION & AFFILIATES.
# SPDX-FileCopyrightText: All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

Signing Your Work

  • We require that all contributors "sign-off" on their commits. This certifies that the contribution is your original work, or you have rights to submit it under the same license, or a compatible license.

    • Any contribution which contains commits that are not Signed-Off will not be accepted.

  • To sign off on a commit you simply use the --signoff (or -s) option when committing your changes:

    git commit -s -m "Add cool feature."

    This will append the following to your commit message:

    Signed-off-by: Your Name <your@email.com>

  • Full text of the DCO:

      Developer Certificate of Origin
  Version 1.1

  Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
  1 Letterman Drive
  Suite D4700
  San Francisco, CA, 94129

  Everyone is permitted to copy and distribute verbatim copies of this license 
  document, but changing it is not allowed.

      Developer's Certificate of Origin 1.1

  By making a contribution to this project, I certify that:

  (a) The contribution was created in whole or in part by me and I have the right to 
  submit it under the open source license indicated in the file; or

  (b) The contribution is based upon previous work that, to the best of my knowledge,
  is covered under an appropriate open source license and I have the right under that
  license to submit that work with modifications, whether created in whole or in part
  by me, under the same open source license (unless I am permitted to submit under a
  different license), as indicated in the file; or

  (c) The contribution was provided directly to me by some other person who certified
  (a), (b) or (c) and I have not modified it.

  (d) I understand and agree that this project and the contribution are public and
  that a record of the contribution (including all personal information I submit with
  it, including my sign-off) is maintained indefinitely and may be redistributed
  consistent with this project or the open source license(s) involved.

Pre-commit

For Modulus development, pre-commit is required. This will not only help developers pass the CI pipeline, but also accelerate reviews. Contributions that have not used pre-commit will not be reviewed.

To install pre-commit follow the below steps inside the Modulus repository folder:

pip install pre-commit
pre-commit install

Once the above commands are executed, the pre-commit hooks will be activated and all the commits will be checked for appropriate formatting.

CI

To ensure quality of the code, your merge request will pass through several CI checks. It is mandatory for your MRs to pass these pipelines to ensure a successful merge. Please keep checking this document for the latest guidelines on pushing code. Currently, The pipeline has following stages:

  1. format Pre-commit will check this for you! Checks for formatting of your python code. Refer black for more information. If your MR fails this test, run black <script-name>.py on problematic scripts and black will take care of the rest.

  2. interrogate Pre-commit will check this for you! Checks if the code being pushed is well documented. The goal is to make the documentation live inside code. Very few exceptions are made. Elements that are fine to have no documentation include init-module, init-method, private and semiprivate classes/functions and dunder methods. For definitions of these, refer interrogate. Meaning for some methods/functions is very explicit and exceptions for these are made. These include forward, reset_parameters, extra_repr, MetaData. If your MR fails this test, add the missing documentation. Take a look at the pipeline output for hints on which functions/classes need documentation. To test the documentation before making a commit, you can run the following during your development

    interrogate \
  --ignore-init-method \
  --ignore-init-module \
  --ignore-module \
  --ignore-private \
  --ignore-semiprivate \
  --ignore-magic \
  --fail-under 99 \
  --exclude '[setup.py]' \
  --ignore-regex forward \
  --ignore-regex reset_parameters \
  --ignore-regex extra_repr \
  --ignore-regex MetaData \
  -vv \
  --color \
  ./modulus/

  3. lint Pre-commit will check this for you! Linters will perform static analysis to check the style, complexity, errors and more. For markdown files markdownlint is used, its suggested to use the vscode, neovim or sublime extensions.

  4. license Pre-commit will check this for you! Checks for correct license headers of all files. To run this locally use make license. See the Licensing Information section above for details about the license header required.

  5. pytest Checks if the test scripts from the test folder run and produce desired outputs. It is imperative that your changes don't break the existing tests. If your MR fails this test, you will have to review your changes and fix the issues. To run pytest locally you can simply run pytest inside the test folder.

  6. doctest Checks if the examples in the docstrings run and produce desired outputs. It is highly recommended that you provide simple examples of your functions/classes in the code's docstring itself. Keep these examples simple and also add the expected outputs. Refer doctest for more information. If your MR fails this test, check your changes and the docstrings. To run doctest locally, you can simply run pytest --doctest-modules inside the modulus folder.

  7. coverage Checks if your code additions have sufficient coverage. Refer coverage for more details. If your MR fails this test, this means that you have not added enough tests to the test folder for your module/functions. Add extensive test scripts to cover different branches and lines of your additions. Aim for more than 80% code coverage. To test coverage locally, run the get_coverage.sh script from the test folder and check the coverage of the module that you added/edited.