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CODE_REVIEW.md

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Code Review

Code reviews can be a tense place whether you're the reviewer or the assignee. All that we ask is that everyone's civil and follows the following etiquette which was crafted by thoughtbot. https://github.com/thoughtbot/guides/blob/main/code-review/README.md with minor alterations

Everyone

  • Accept that many programming decisions are opinions. Discuss tradeoffs, which you prefer, and reach a resolution quickly.
  • Ask good questions; don't make demands. ("What do you think about naming this :user_id?")
  • Good questions avoid judgment and avoid assumptions about the author's perspective.
  • Ask for clarification. ("I didn't understand. Can you clarify?")
  • Avoid selective ownership of code. ("mine", "not mine", "yours")
  • Avoid using terms that could be seen as referring to personal traits. ("dumb", "stupid"). Assume everyone is intelligent and well-meaning.
  • Be explicit. Remember people don't always understand your intentions online.
  • Be humble. ("I'm not sure - let's look it up.")
  • Don't use hyperbole. ("always", "never", "endlessly", "nothing")
  • Don't use sarcasm.
  • Keep it real. If emoji, animated gifs, or humor aren't you, don't force them.
  • Talk synchronously (e.g. chat, screen-sharing, in person) if there are too many "I didn't understand" or "Alternative solution:" comments. Post a follow-up comment summarizing the discussion.

Having Your Code Reviewed

  • Be grateful for the reviewer's suggestions. ("Good call. I'll make that change.")
  • Be aware that it can be challenging to convey emotion and intention online
  • Explain why the code exists. ("It's like that because of these reasons. Would it be more clear if I rename this class/file/method/variable?")
  • Extract some changes and refactoring into future tickets/stories.
  • Link to the code review from the ticket/story. ("Ready for review: https://github.com/organization/project/pull/1")
  • Push commits based on earlier rounds of feedback as isolated commits to the branch. Do not squash until the branch is ready to merge. Reviewers should be able to read individual updates based on their earlier feedback.
  • Seek to understand the reviewer's perspective.
  • Try to respond to every comment.
  • Wait to merge the branch until Bitrise (our continuous integration platform)tells you the test suite is green in the branch.
  • Merge once you feel confident in the code and its impact on the project.
  • Final editorial control rests with the pull request author.

Reviewing Code

Understand why the change is necessary (fixes a bug, improves the user experience, refactors the existing code). Then:

  • Communicate which ideas you feel strongly about and those you don't.
  • Identify ways to simplify the code while still solving the problem.
  • If discussions turn too philosophical or academic, move the discussion offline to a regular Friday afternoon technique discussion. In the meantime, let the author make the final decision on alternative implementations.
  • Offer alternative implementations, but assume the author already considered them. ("What do you think about using a custom validator here?")
  • Seek to understand the author's perspective.
  • Sign off on the pull request with a 👍 or "Ready to merge" comment.
  • Remember that you are here to provide feedback, not to be a gatekeeper.