Pull Requests & Code Review
Pull Requests (PRs) are the collaboration mechanism of modern software development. A high-quality PR process is one of the most impactful DevOps practices - it catches bugs, shares knowledge, and maintains code quality.
The Perfect PR
- Small - under 400 lines changed. Large PRs are hard to review and take 3x longer
- Focused - one concern per PR. Bug fix is separate from feature addition
- Descriptive title: 'feat: add user authentication via OAuth2' not 'updates'
- Description: what changed, why, how to test it, screenshots if UI change
- Linked to issue: Closes #123 auto-closes the GitHub issue on merge
- Passing CI: All tests green before requesting review
Code Review Best Practices
# GitHub PR template (.github/pull_request_template.md)
## Summary
<!-- What does this PR do? Why is it needed? -->
## Changes
- [ ] List specific changes made
- [ ] List any breaking changes
## Testing
<!-- How did you test this? -->
- [ ] Unit tests pass: `npm test`
- [ ] Integration tests pass: `npm run test:e2e`
- [ ] Manual testing done: describe what you tested
## Screenshots (if UI change)
<!-- Before/After screenshots -->
## Checklist
- [ ] Code follows style guidelines
- [ ] No console.logs or debug code
- [ ] Secrets are NOT hardcoded
- [ ] Documentation updated
- [ ] Closes #ISSUE_NUMBER
---
# Reviewer checklist (for the person reviewing)
# Ask:
# - Does the code do what the PR says?
# - Is it tested adequately?
# - Is it readable and maintainable?
# - Any security concerns?
# - Performance implications?
# Use COMMENTS not CHANGES requests for minor style issues
# Approve when: logic correct + tests passing + secureQuick Quiz
Tip
Tip
Practice Pull Requests Code Review in small, isolated examples before integrating into larger projects. Breaking concepts into small experiments builds genuine understanding faster than reading alone.
K8s orchestrates containers - auto-scaling, self-healing, rolling updates
Practice Task
Note
Practice Task - (1) Write a working example of Pull Requests Code Review from scratch without looking at notes. (2) Modify it to handle an edge case (empty input, null value, or error state). (3) Share your solution in the Priygop community for feedback.
Common Mistake
Warning
A common mistake with Pull Requests Code Review is skipping edge case testing - empty inputs, null values, and unexpected data types. Always validate boundary conditions to write robust, production-ready devops code.
Key Takeaways
- Pull Requests (PRs) are the collaboration mechanism of modern software development.
- Small - under 400 lines changed. Large PRs are hard to review and take 3x longer
- Focused - one concern per PR. Bug fix is separate from feature addition
- Descriptive title: 'feat: add user authentication via OAuth2' not 'updates'