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Blubber creates Dockerfiles from a higher level description expressed as YAML. A Dockerfile is used by Docker to build images. Blubber supports creation of multi-stage Dockerfiles. Blubber is a command line tool.

Blubber is used by Wikimedia CI to test code and publish production-ready Docker images.

Try a walkthrough that helps you create your first Blubberfile, create your first Docker images, and start using Blubber for your project
Download the Blubber command line application
Wikimedia's Continuous Delivery pipeline project makes use of Blubber to run tests and publish images.
Blubber's background, philosophy, and implementation
Detailed Blubber User Guide