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Contributing Guidelines

Thank you for your interest in contributing to Oasis Core! There are many ways to contribute, and this document should not be considered encompassing.

If you have a general question on how to use and deploy our software, please read our General Documentation or join our Oasis Network Community server on Discord.

For concrete feature requests and/or bug reports, please file an issue in this repository as described below.

Table of Contents

Feature Requests

Bug Reports

Development

Feature Requests

To request new functionality, there are two primary approaches that will be most effective at receiving input and making progress.

If the feature is small - a change to a single piece of functionality, or an addition that can be expressed clearly and succinctly in a few sentences, then the most appropriate place to propose it is as a new Feature request in this repository.

If the feature is more complicated, involves protocol changes, or has potential safety or performance implications, then consider proposing an ADR and submit it as a pull request ot this repository. This will allow a structured review and commenting of the proposed changes. You should aim to get the ADR accepted and merged before starting on implementation.

Note that the project's committers still have the final word on what is accepted into the project.

Bug Reports

Bugs are a reality for any software project. We can't fix what we don't know about!

If you believe a bug report presents a security risk, please follow responsible disclosure and report it directly to security@oasislabs.com instead of filing a public issue or posting it to a public forum. We will get back to you promptly.

Otherwise, please, first search between existing issues in our repository and if the issue is not reported yet, file a new one.

Development

Building

Our development environment is documented in our README.

Contributing Code

  • File issues: Please make sure to first file an issue (i.e. feature request, bug report) before you actually start work on something.

  • Create branches: If you have write permissions to the repository, you can create user-id prefixed branches (e.g. user/feature/foobar) in the main repository. Otherwise, fork the main repository and create your branches there.

    • Good habit: regularly rebase to the HEAD of master branch of the main repository to make sure you prevent nasty conflicts:

      git rebase <main-repo>/master
    • Push your branch to GitHub regularly so others can see what you are working on:

      git push -u <main-repo-or-your-fork> <branch-name>

      Note that you are allowed to force push into your development branches.

  • Use draft pull requests for work-in-progress:

    • The draft state signals that the code is not ready for review, but still gives a nice URL to track the ongoing work.
  • master branch is protected and will require at least 1 code review approval from a code owner before it can be merged.

  • When coding, please follow these standard practices:

    • Write tests: Especially when fixing bugs, make a test so we know that we’ve fixed the bug and prevent it from reappearing in the future.
    • Logging: Please follow the logging conventions in the rest of the code base.
    • Instrumentation: Please following the instrumentation conventions in the rest of the code.
      • Try to instrument anything that would be relevant to an operational network.
  • Change Log: Please write a Change Log fragment that will be included in the next section of the Change Log once a new version is released.

  • Documentation: Please write documentation in the code as you go. If possible also consider updating/augmenting the developer documentation.

  • Check CI: Don’t break the build!

    • Make sure all tests pass before submitting your pull request for review.
  • Signal PR review:

    • Mark the draft pull request as Ready for review.
    • Please include good high-level descriptions of what the pull request does.
    • The description should include references to all GitHub issues addressed by the pull request. Include the status ("done", "partially done", etc).
    • Provide some details on how the code was tested.
    • After you are nearing review (and definitely before merge) squash commits into logical parts (avoid squashing over merged commits, use rebase first!). Use proper commit messages which explain what was changed in the given commit and why.
  • Get a code review:

    • Code owners will be automatically assigned to review based on the files that were changed.
    • You can generally look up the last few people to edit the file to get the best person to review.
    • When addressing the review: Make sure to address all comments, and respond to them so that the reviewer knows what has happened (e.g. "done" or "acknowledged" or "I don't think so because ...").
  • Merge: Once approved, the creator of the pull request should merge the branch, close the pull request, and delete the branch. If the creator does not have write access to the repository, one of the committers should do so instead.

  • Signal to close issues: Let the person who filed the issue close it. Ping them in a comment (e.g. @user) making sure you’ve commented how an issue was addressed.

    • Anyone else with write permissions should be able to close the issue if not addressed within a week.

Contributing Documentation

Documentation is always welcome! Documentation comes in several forms:

  • Code-level documentation, following language specifications.
  • Developer and system documentation, which lives in docs/, describes commonly used components, protocols and testing procedures.

Style Guides

Git Commit Messages

A quick summary:

  • Separate subject from body with a blank line.
  • Limit the subject line to 72 characters.
  • Capitalize the subject line.
  • Do not end the subject line with a period.
  • Use the present tense ("Add feature" not "Added feature").
  • Use the imperative mood ("Move component to..." not "Moves component to...").
  • Wrap the body at 80 characters.
  • Use the body to explain what and why vs. how.

A detailed post on Git commit messages: How To Write a Git Commit Message.

Go Style Guide

Go code should use the standard gofmt formatting style. Be sure to run gofmt before pushing any code.

gofmt also does not check import order/grouping, so please ensure that you use the following convention:

package foo

import (
  // Standard library imports.
  "context"
  "errors"

  // External imports.
  "github.com/opentracing/opentracing-go"

  // Internal imports.
  "github.com/oasisprotocol/oasis-core/go/common/crypto/hash"
)

Rust Style Guide

Rust code should use the style provided in the .rustfmt.toml in the top-level directory of the repository. Be sure to run cargo fmt before pushing any code.

Similar as above for Go, rustfmt does not check import order/grouping, so please ensure that you use the following convention:

// External crates.
extern crate foo;

// Local modules.
mod bar;

// Standard library imports.
use std::{mem, box::Box};

// External imports.
use foo::baz;

// Internal imports.
use bar::quux;

Additionally, as rustfmt does not check Cargo.toml, please manually verify that changes to Cargo.toml follow the best practices (the most important ones are sorting dependencies and splitting long lines).