cimg/ruby

This image is designed to supercede the legacy CircleCI Ruby image, circleci/ruby.

cimg/ruby is a Docker image created by CircleCI with continuous integration builds in mind. Each tag contains a complete Ruby version, the gem command, Bundler, and any binaries and tools that are required for builds to complete successfully in a CircleCI environment.

Getting Started

This image can be used with the CircleCI docker executor. For example:

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jobs:
  build:
    docker:
      - image: cimg/ruby:3.3.6
    steps:
      - checkout
      - run: ruby --version

In the above example, the CircleCI Ruby Docker image is used for the primary container. More specifically, the tag 3.3.6 is used meaning the version of Ruby will be Ruby v3.3.6. You can now use Ruby within the steps for this job.

How This Image Works

This image contains the Ruby programming language. This includes the gem command as well as Bundler pre-installed.

Tagging Scheme

This image has the following tagging scheme:

cimg/ruby:<ruby-version>[-variant]

<ruby-version> - The version of Ruby to use. This can be a full SemVer point release (such as 2.6.5) or just the minor release (such as 2.6). If you use the minor release tag, it will automatically point to future patch updates as they are released. For example, the tag 2.6 points to Ruby v2.6.5 now, but when the next release comes out, it will point to Ruby v2.6.6.

[-variant] - Variant tags, if available, can optionally be used. For example, the Node.js variant can be used like this: cimg/ruby:2.6.5-node.

Image Tags

Variants

Variant images typically contain the same base software, but with a few additional modifications.

Node.js

The Node.js variant is the same Ruby image but with Node.js also installed. The Node.js variant can be used by appending -node to the end of an existing cimg/ruby tag.

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jobs:
  build:
    docker:
      - image: cimg/ruby:3.3.6-node
    steps:
      - checkout
      - run: ruby --version
      - run: node --version

Browsers

The browsers variant is the same Ruby image but with Node.js, Java, Selenium, and browser dependencies pre-installed via apt. The browsers variant can be used by appending -browser to the end of an existing cimg/ruby tag. The browsers variant is designed to work in conjunction with the CircleCI Browser Tools orb. You can use the orb to install a version of Google Chrome and/or Firefox into your build. The image contains all of the supporting tools needed to use both the browser and its driver.

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orbs:
  browser-tools: circleci/browser-tools@1.1
jobs:
  build:
    docker:
      - image: cimg/ruby:2.7-browsers
    steps:
      - browser-tools/install-browser-tools
      - checkout
      - run: |
          ruby --version
          node --version
          java --version
          google-chrome --version