What is GitHub Actions?

GitHub Actions lets you create automated workflows that run directly in your GitHub repositories. It is ideal for CI/CD pipelines, test automation, and deployment processes.

You define your workflows with YAML-based configuration files and run them in response to GitHub events (push, pull request, issue).

Workflow Structure

A GitHub Actions workflow consists of three main parts: on (trigger), jobs, and steps. Each job is a sequence of steps running on a runner.

You can define dependencies between jobs to create sequential or parallel execution patterns.

Common Use Cases

With GitHub Actions, you can automate running tests, code quality checks, building Docker images, and deploying to cloud platforms.

Test and lint checks Docker image build and push AWS/GCP/Azure deployment Automated versioning

Matrix Build Strategy

The matrix strategy lets you run the same workflow in parallel across different operating systems or language versions. This is ideal for testing cross-platform compatibility.

Security and Secret Management

GitHub Actions lets you securely store sensitive information using GitHub Secrets. You can encrypt and use API keys, passwords, and certificates in your workflows.