GitHub Actions automates software workflows directly in your repository. You can run tests, build artifacts, deploy apps, and handle repetitive tasks whenever events happen in GitHub.
This quick guide covers the core concepts and a simple workflow you can adapt for your own projects.
What is GitHub Actions?
GitHub Actions is GitHub’s built-in CI/CD platform. Workflows are defined in YAML and triggered by repository events like pushes, pull requests, and issue activity.
Setting up a Workflow
Create a .github/workflows directory at the root of your repository, then add a workflow file such as test.yml.
This example runs tests on pushes and pull requests to the main branch.
# .github/workflows/test.yml
name: Run Tests
on:
push:
branches:
- main
pull_request:
branches:
- main
jobs:
test:
runs-on: ubuntu-latest
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Set up Node.js
uses: actions/setup-node@v4
with:
node-version: 20
- name: Install dependencies
run: npm install
- name: Run tests
run: npm test
This workflow defines a test job on Ubuntu, checks out code, sets up Node.js, installs dependencies, and runs tests. You can replace these steps with commands specific to your stack.
Workflow Triggers
The on section controls when a workflow runs. In this example it triggers on:
- pushes to
main - pull requests targeting
main
You can also trigger on schedules, tags, releases, and many other events.
Actions Marketplace
The GitHub Marketplace includes many reusable actions for common tasks such as deployments, notifications, linting, and security checks.
For example, you can deploy to GitHub Pages after tests complete:
- name: Deploy to GitHub Pages
uses: JamesIves/[email protected]
with:
branch: gh-pages
folder: build
This action publishes the build directory to the gh-pages branch.
Monitoring Workflow Runs
After pushing changes or opening pull requests, view run history in the repository’s Actions tab. Each run includes per-step logs for debugging failed jobs.
Conclusion
GitHub Actions can dramatically improve consistency and speed by automating repetitive work. Start with a small test workflow, then expand into build, release, and deployment pipelines as your process matures.
Once your first workflow is in place, you will have a reliable baseline you can iterate on with each project.
This post was generated with the help of AI.
David M. Auble
Indianapolis-based solution architect. I build, secure, and rescue web applications — and write about the tools that make it easier. Get in touch →
