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Contributing to ReactiveUI

We'd love for you to contribute to our source code and to make reactiveui even better than it is today! Here are the guidelines we'd like you to follow:

Code of Conduct

Help us keep the project open and inclusive. Please read and follow our Code of Conduct.

Got a Question or Problem?

If you have questions about how to use reactiveui, please direct these to StackOverflow. The project maintainers hang out in this Slack channel.

Found an Issue?

If you find a bug in the source code or a mistake in the documentation, you can help us by submitting an issue to our GitHub Repository. Even better you can submit a Pull Request with a fix.

Please see the Submission Guidelines below.

Want a Feature?

You can request a new feature by submitting an issue to our GitHub Repository. If you would like to implement a new feature then consider what kind of change it is:

  • Major Changes that you wish to contribute to the project should be discussed first in Slack so that we can better coordinate our efforts, prevent duplication of work, and help you to craft the change so that it is successfully accepted into the project.
  • Small Changes can be crafted and submitted to the GitHub Repository as a Pull Request.

Submission Guidelines

Submitting an Issue

If your issue appears to be a bug, and hasn't been reported, open a new issue. Help us to maximize the effort we can spend fixing issues and adding new features, by not reporting duplicate issues.

Providing the following information will increase the chances of your issue being dealt with quickly:

  • Overview of the Issue - if an error is being thrown a stack trace helps
  • Motivation for or Use Case - explain why this is a bug for you
  • reactiveui Version(s) - is it a regression?
  • Operating System - is this a problem with all browsers or only specific ones?
  • Reproduce the Error - provide a example or an unambiguous set of steps.
  • Related Issues - has a similar issue been reported before?
  • Suggest a Fix - if you can't fix the bug yourself, perhaps you can point to what might be causing the problem (line of code or commit)

If you get help, help others. Good karma rulez!

Submitting a Pull Request

Before you submit your pull request consider the following guidelines:

  • Search GitHub for an open or closed Pull Request that relates to your submission. You don't want to duplicate effort.

  • Make your changes in a new git branch:

    git checkout -b my-fix-branch master
  • Create your patch, including appropriate test cases.

  • Follow our Coding Rules.

  • Run the test suite, as described below.

  • Commit your changes using a descriptive commit message that follows our commit message conventions.

    git commit -a

    Note: the optional commit -a command line option will automatically "add" and "rm" edited files.

  • Build your changes locally to ensure all the tests pass:

  • Push your branch to GitHub:

    git push origin my-fix-branch

In GitHub, send a pull request to reactiveui:master.

If we suggest changes, then:

  • Make the required updates.
  • Re-run the test suite to ensure tests are still passing.
  • Commit your changes to your branch (e.g. my-fix-branch).
  • Push the changes to your GitHub repository (this will update your Pull Request).

If the PR gets too outdated we may ask you to rebase and force push to update the PR:

git rebase master -i
git push origin my-fix-branch -f

WARNING: Squashing or reverting commits and force-pushing thereafter may remove GitHub comments on code that were previously made by you or others in your commits. Avoid any form of rebasing unless necessary.

That's it! Thank you for your contribution!

After your pull request is merged

After your pull request is merged, you can safely delete your branch and pull the changes from the main (upstream) repository:

  • Delete the remote branch on GitHub either through the GitHub web UI or your local shell as follows:

    git push origin --delete my-fix-branch
  • Check out the master branch:

    git checkout master -f
  • Delete the local branch:

    git branch -D my-fix-branch
  • Update your master with the latest upstream version:

    git pull --ff upstream master

Coding Rules

To ensure consistency throughout the source code, keep these rules in mind as you are working:

  • All features or bug fixes must be tested by one or more unit tests.
  • All public API methods must be documented with XML documentation.

Git Commit Guidelines

Each commit message consists of a header, a body and a footer. The header has a special format that includes a type and a subject:

<type>: <subject>


If the commit reverts a previous commit, it should begin with revert:, followed by the header of the reverted commit. In the body it should say: This reverts commit <hash>., where the hash is the SHA of the commit being reverted.


Must be one of the following:

  • feat: A new feature
  • fix: A bug fix
  • docs: Documentation only changes
  • style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
  • refactor: A code change that neither fixes a bug nor adds a feature
  • perf: A code change that improves performance
  • test: Adding missing tests
  • chore: Changes to the build process or auxiliary tools and libraries such as documentation generation


The subject contains succinct description of the change:

  • use the imperative, present tense: "change" not "changed" nor "changes"
  • don't capitalize first letter
  • no dot (.) at the end


Just as in the subject, use the imperative, present tense: "change" not "changed" nor "changes". The body should include the motivation for the change and contrast this with previous behavior.


The footer should contain any information about Breaking Changes and is also the place to reference GitHub issues that this commit Closes.

Breaking Changes should start with the word BREAKING CHANGE: with a space or two newlines. The rest of the commit message is then used for this.