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introduction-to-ci.md

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Introduction to CI

Overview

If you're already familiar with CI and have it configured on your project already, move on to Getting Started.

Lighthouse CI provides added value to your continuous integration (CI) process. If you're unfamiliar with continuous integration or haven't set it up on a project before, this document will define a few key concepts and provide references on how to getting started with various CI providers.

Concepts

CI - Continuous Integration

a software development practice where members of a team integrate their work frequently, usually each person integrates at least daily - leading to multiple integrations per day. Each integration is verified by an automated build (including tests) to detect integration errors as quickly as possible.

- Martin Fowler

Continuous integration is about making small, frequent changes to a codebase and automatically testing those changes to ensure you always have a working build. Lighthouse CI helps make Lighthouse a part of the automated testing process.

CD - Continuous Delivery

Continuous Delivery is a software development discipline where you build software in such a way that the software can be released to production at any time.

- Martin Fowler

A closely related practice to continuous integration. By running Lighthouse within your continuous integration process, you can more confidently release to production.

CI Provider

A vendor that provides hosted services and version control integrations to facilitate automated testing for continuous integration.

Setting Up CI

There are many CI providers out there to choose from. Lighthouse CI works with any provider that offers a stable environment with Node 10 LTS or later and stable Chrome. Below are some common providers documentation on how to get started.