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CircleCI

Fastest CI/CD platform for building, testing, and deploying software.

What is CircleCI?​

CircleCI automates your software builds, tests, and deployments. After a software repository on GitHub or Bitbucket is authorized and added as a project to circleci.com, every code change triggers automated tests in a clean container or VM.

Core Topics​

  • CircleCI Concepts — Key concepts and components
  • CircleCI Commands — Common commands and operations

Key Features​

  • Cloud-native CI/CD — No servers to manage
  • Docker support — Build, test, and deploy in containers
  • Free tier available — Get started without cost
  • Parallel testing — Speed up test execution
  • Caching — Optimize build times
  • Workflows — Orchestrate complex deployments
  • Orbs — Reusable CircleCI configurations

Workflows​

Organize jobs into workflows:

  1. Define individual jobs in config
  2. Create workflow orchestration
  3. Run tests in parallel
  4. Deploy on success
  5. Send notifications

Supported Platforms​

  • Version control — GitHub, Bitbucket, GitLab
  • Languages — Python, Node.js, Ruby, Java, Go, PHP, etc.
  • Cloud providers — AWS, Azure, GCP
  • Deployment targets — Docker, Kubernetes, Heroku, etc.

Contributing​

Know great CircleCI resources? Submit a PR to help the community learn!