Continuous Integration with GitHub Actions
📌 Covered in this chapter:
Installing Dependencies · Linting · Running Tests · Matrix Builds
Set up a CI pipeline that automatically installs dependencies, lints, and tests your code on every push and pull request.
1Continuous Integration with GitHub Actions — What You'll Learn
Set up a CI pipeline that automatically installs dependencies, lints, and tests your code on every push and pull request.
Here's everything this chapter covers, in the order you'll learn it:
- What Continuous Integration (CI) means
- Installing project dependencies in a workflow
- Running your linter automatically
- Running your test suite automatically
- Building the project as part of CI
- Matrix builds (testing across multiple versions/OSes)
- Example CI setups for Node.js, Python, Java, C++, C# and Rust
- Required status checks blocking bad merges
2Working Example
💻 Example: Continuous Integration with GitHub Actions
YAML
name: CI
on:
push:
branches: [main]
pull_request:
branches: [main]
jobs:
test:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- name: Setup Node
uses: actions/setup-node@v4
with:
node-version: 22
- run: npm ci
- run: npm test3Best Practices & Common Pitfalls
💡 Key things to remember:
- Pairing CI with a required-status-check branch protection rule (Phase 11) means a pull request literally cannot be merged until its tests pass — a huge safety net for teams.
❓ Frequently Asked Questions (FAQ)
Q What's the most important thing to understand about continuous integration with github actions?
Focus on: Installing Dependencies · Linting · Running Tests · Matrix Builds. These are the core building blocks this chapter's examples are built around, and they show up repeatedly in later chapters of this course.
Q Is continuous integration with github actions something I'll use often in real projects?
Yes — every concept in this chapter reflects a real, everyday part of professional Git and GitHub workflows, not just a theoretical exercise.