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Add generic page on the PR review process (#1693)
Co-authored-by: Martin Hjelmare <marhje52@gmail.com>
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@ -23,11 +23,6 @@ review again.
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Before you click the "Ready for review" button, make sure you have addressed
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all requested changes, and all our CI jobs and checks are passing successfully.
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We are currently still testing these features and workflow, which is only active
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on our Core repository. Please let us know in the
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[#devs channel in our Discord chat](https://www.home-assistant.io/join-chat)
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if you have any feedback.
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## What is a draft PR?
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A draft PR is a PR that is not ready for review yet. It is a way to let others
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@ -70,3 +65,5 @@ right now.
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More background information can be found in this
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[Google Document](https://docs.google.com/document/d/11_x2YUmAD07JN7JMM4YIIAWVGTJsOB0UptN8hlmWFWg/edit?usp=sharing).
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Or, [read all about our review process on this page](/docs/review-process).
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301
docs/review-process.md
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301
docs/review-process.md
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---
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title: "Pull request review process"
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---
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The Home Assistant project consists of many smaller projects in many GitHub
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repositories that (all together) make the amazing Home Assistant we all
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know and love.
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We get many contributions offered to us via GitHub Pull Requests, which
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is absolutely amazing. We are very grateful for that. This page describes
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our review process, so you know what to expect when you submit a PR.
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This page provides general tips and guidelines for creating pull requests
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and how to handle those. It is not a complete guide on creating a PR; However,
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most of this page applies to contributing to any open source project
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in general.
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## Who is responsible for reviewing PRs?
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Home Assistant is an open source project. Most of everything happening in
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our project is done by volunteers. We have a core team of developers that
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are responsible for the overall architecture of Home Assistant, and they
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are responsible for merging PRs (also volunteers). However, they are not
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the only ones reviewing PRs.
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Everybody can help out reviewing PRs, and we encourage anyone to do so. 🙏
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So, when you have opened a PR, please consider checking out if there is an
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open PR you can help out with. Any review comment, improvement suggestion,
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or even just a "I tested this using ... and it works" is very much appreciated.
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Besides, looking at code of others is a great way to learn more about
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Home Assistant.
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## Creating the perfect PR
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There is no such thing as a perfect PR, but there are some things you can
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do to make it easier to review your PR. This will not only help reviewers
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but also you as a contributor to having your change merged quicker, and
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the end-user getting your improvement faster.
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1. **Make your PRs as small as possible.**
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A PR should only refactor one thing, fix one thing, add one feature, or
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adjust a single subject in the documentation. If you want to change multiple
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things, please create multiple PRs. Smaller PRs have a smaller scope, need
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less time to review, conflict less often, and generally need fewer review
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iterations.
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2. **Only change one thing at a time.**
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This is the same as the previous point but a bit more specific. It is
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tempting to improve those one or two lines you've noticed nearby,
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but please don't. Put those in a separate PR. Unrelated changes in
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your PR are distracting and often lead to questions. In contrast, in an
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independent PR, it would be a quick and simple review and merge.
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3. **Test your changes _before_ creating a PR**.
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This sounds obvious, but we often see PRs that contain impossible code
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that could never have worked or documentation changes that aren't visible
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on the resulting page. Of course, a waste of energy for both you and the
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reviewer; it adds an unneeded review iteration. Make sure you at least run
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and physically test your changes. Ensure they work (or, in the case
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of documentation: look) as intended.
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4. **Ensure your PR is based on the latest version of the main upstream branch.**
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Make sure to pull in the latest upstream changes before creating your PR.
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While you wrote your changes, upstream may have changed. This can lead to
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merge conflicts, failing tests, or your changes not working as expected.
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5. **Create a (feature) branch.**
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When you create a PR, it is based on a branch (usually the main branch).
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You must create a new feature branch for each PR you create. This
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makes it easier to keep your main branch up to date with the upstream
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branch, and it makes it easier to delete the branch after the PR
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has been merged.
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6. **Motivate your PR by adding a clear title & extensive description.**
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When you open up a PR, you will be provided a PR template. Use the template,
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fill out as many fields as possible, take your time to write a good,
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clear, and concise title, and add an extensive description of your change.
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Be sure to add a motivation (or use case) to your PR, so the reviewer can
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understand why you are making this change (or why you make certain decisions).
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## Receiving review comments
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When your PR is open, someone will look at your code at some point. The
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reviewer likely has some comments on your code or even some requests for
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changes to your code.
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**Be very aware these review comments are not personal.** The reviewer is not
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trying to insult you or make you feel bad. They are trying to help you improve
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your PR, so it can be merged. Just like you, they are a volunteer, and they are
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trying to work on making Home Assistant the best it can be. We all have the
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same goals.
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No matter how experienced you are, there is always something to learn from
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others, so don't hate it, embrace it. 😄 Don't be afraid to ask questions,
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or ask for clarification. If you don't understand something, ask!
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## PRs are being drafted when changes are needed
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If there have been changes requested to your PR, our bot will automatically
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mark your PR as a draft. This means that the PR is not ready to be merged
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or further reviewed for the moment.
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Draft PRs tell other reviewers that look at the list of all PRs that this
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PR is currently in progress and doesn't require their attention yet.
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Once you have made the requested changes, you can mark the PR as ready for
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review again by clicking the "Ready for review button":
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Before you click the "Ready for review" button, ensure you have addressed
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all requested changes and that all our CI jobs and checks are passing
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successfully.
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Once you've clicked the "Ready for review" button, the PR will return to a
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normal state again, and our bot will automatically notify the reviewers who
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requested the changes that the PR is ready to go!
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## Speeding up the review process
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1. **Build/CI failure? Draft your PR!**
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Opened up the PR, and the build failed? Don't worry, this happens to all of
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us. If you are sure the failure is not related to your changes, you can
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leave your PR open. However, if the failure is related to your changes,
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you should mark your PR as a draft while you resolve it. This will prevent
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reviewers from looking at your PR until it is ready.
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2. **Monitor your PR and keep it up to date.**
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Even if your PR is not reviewed, you should actively monitor it. Be sure no
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merge conflicts have been introduced in the meantime (GitHub
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will tell you if that is the case), and maybe rebase it onto the latest
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development branch after a week of inactivity. This ensures your PR is
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ready to go once the review process starts.
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3. **Add tests.**
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If you are adding new features, make sure to add tests. If you are fixing
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a bug, make sure to add a test that would have caught the bug. If you are
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refactoring code, add tests to make sure your refactoring didn't break
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anything. Tests help with showing your code works as expected,
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but more importantly, ensures everything keeps working in the future.
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While tests add more code to review, it also helps reviewers understand
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the issue you've been solving differently.
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4. **Revisit, tweak, and tune to perfection.**
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Sometimes, looking back at your own code a little later teaches you new
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things and help you spot imperfections or issues yourself. While waiting for review
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it is always the perfect time to ensure your PR is as good as it can be.
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5. **Help out reviewing the queue.**
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The best way to help speed up the review process is by helping out
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with the review process! Any review work you pick up contributes to
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speeding up the review process for everyone. Besides, someone else
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might notice your reviews and return the favor.
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## What not to do
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- Don't contact contributors, code owners, core team members, or other
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reviewers directly about a PR, or ping/mention them in a PR to ask for
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a review. While you probably mean this in a friendly way, it can be
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perceived as annoying or demanding. Instead, our bots will handle the
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pinging of the right people, and: have a bit of patience :)
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- Don't ask for a review in the PR description. It would be redundant, as
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the PR itself already makes that clear 😉. Our bots will notify the
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appropriate people if that is needed; please avoid doing that yourself.
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- Do not submit new pull requests that depend on other pull requests that are
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still open/unmerged. This will create unneeded pull requests in the queue
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that are not actionable.
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- Limit the number of open pull requests you have. We have no hard rule on
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this, but we recommend limiting it to 5. If you have more than 5 open
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PRs, we may ask you to close some of them until some others have been merged.
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- Don't open a PR if you are not going to work on it. If you cannot
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continue working on a PR after you have opened it, let us know and close it.
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There is no shame in closing a PR; however, if it is because you are stuck,
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don't hesitate to ask for help in our
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[#devs channel in our Discord chat](https://www.home-assistant.io/join-chat).
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## My PR has been merged!
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Congratulations! 🎉
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**And above all: A massive thank you! ❤️**
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You have just made Home Assistant a better place. You have helped us to
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improve the code, the documentation, the tests, the user experience, or
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the community. You have helped us to make Home Assistant better for everyone.
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Keep the momentum going! 🚀 Feel free to open up another PR, or help out
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with reviewing other PRs.
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If this was your first PR, don't worry, we promise, it will become easier
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each time you go through the process.
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## Frequently asked questions
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1. **How do I get my PR merged?**
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There is no guarantee that your PR will be merged. We have a lot of
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contributors, and we have to make sure that we don't break anything.
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We will try to review your PR as soon as possible, but please be patient.
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If you want to speed up the process, please read the sections above on
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how to speed up the review process.
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2. **My PR has been awaiting review for days now, when will it be reviewed?**
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Depending on the repository, it might take a while before your PR is
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reviewed. It depends on a lot of things. For example, PRs that fix bugs,
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improve code quality, are small, or provide tests (and combinations of those)
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are generally prioritized over PRs that add new features. The size and
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complexity of a PR can also be a factor, as it means that lesser reviewers
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are willing or capable of picking up your PR. You can always consider trying
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to make your PRs smaller and more focused to speed up the review process.
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Some other PRs may require or need someone with specific knowledge to review
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it (like an architectural change or change that needs approval
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by a code owner), which may cause a longer wait time.
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3. **All those small PRs are super inefficient, aren't they?**
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This is a common misconception. While it might seem like a lot of work
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to review a lot of small PRs, it is actually more efficient. Smaller PRs
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are easier to review for a larger group of people, meaning more people can
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jump in to help with the reviews. They can be picked up quicker in less
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time and are less likely to conflict with other PRs. In general,
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reviewing a smaller PR gets a better review and is less likely to cause
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new bugs, as it is easier to overlook something in a large PR.
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4. **The bot is saying my PR is going stale, what does that mean?**
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The bot will automatically mark a PR as stale after some time of inactivity.
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The bot will close the PR if it remains inactive. This can either mean the PR is
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awaiting a change from you or a review from our project. Please make sure
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the first one isn't the case, in case you are awaiting a review,
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just comment that. By responding to the bot, it will know things are not
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stale and will back off. In the mean time, it might be a good idea to rebase
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your PR on the latest development branches to ensure you are fully
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catched up with recent changes.
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5. **I have a PR that should go into a hotfix/patch release, how do I do that?**
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Just create the PR as normal, and make it very clear in the PR description
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that the PR is a hotfix that needs to be included in a patch release. The
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reviewer will then double-check that, and make sure it is included in
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the next patch release by tagging the PR with the next patch milestone.
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## Repository specific information
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Some of our respositories have specific requirements or guidelines that are
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applied on top of this general guide.
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### Home Assistant Core
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The [Home Assistant Core](https://github.com/home-assistant/core) repository
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has quite a few requirements and guidelines to ensure the quality of the code.
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The following pages in our developer documentation might be helpful when
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creating contributions to our Core repository:
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- [Development checklist](/docs/development_checklist)
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- [Development checklist for integrations](/docs/creating_component_code_review)
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- [Submitting your work](/docs/development_submitting)
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- [Style guidelines](/docs/development_guidelines)
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- [Testing your code](/docs/development_testing)
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- [Catching up with reality](/docs/development_catching_up)
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- [Tips and Tricks](/docs/development_tips)
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### Home Assistant Documentation
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The [documentation](https://github.com/home-assistant/home-assistant.io) has
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additional guidelines to take into account when contributing. We mainly
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follow the Microsoft Writing Style Guide and have some additional guidelines
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for styling YAML configuration.
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- [Documentation standards](/docs/documenting/standards)
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- [Microsoft Writing Style Guide](https://learn.microsoft.com/en-us/style-guide/welcome/)
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- [YAML Style Guide](/docs/documenting/yaml-style-guide)
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### Home Assistant Frontend
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The [Home Assistant Frontend](https://github.com/home-assistant/frontend) has
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guidance on developing and contributing to the frontend on the
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[Frontend development page](/docs/frontend/development#creating-pull-requests).
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### Home Assistant Intents
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Building a voice assistant is a complex task. It requires a lot of different
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technologies to work together, so there are some guidelines to look at:
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- [Contributing template sentences](/docs/voice/intent-recognition/contributing)
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- [Response Style Guide](/docs/voice/intent-recognition/style-guide)
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## Help?! I have more questions!
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The developer documentation has a lot of information, even more information
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on contributing and pull requests, so be sure to use the search function
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on the top right of the page to find what you are looking for.
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However, it might be you are still stuck or you have a question that is
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not answered in the documentation. In that case, feel free to ask in the
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[#devs channel in our Discord chat](https://www.home-assistant.io/join-chat).
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Many of us hang out there, and there is always someone willing to help you out.
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@ -254,7 +254,7 @@ module.exports = {
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Misc: [
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"misc",
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"review-process",
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// Documenting as a category
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{
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type: "category",
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