This guide covers configuring continuous integration pipelines for Ruby projects. If you’re new to Drone please read our Tutorial and build configuration guides first.

Build and Test

In the below example we demonstrate a pipeline that executes bundle install and rake commands. These commands are executed inside the ruby Docker container, downloaded at runtime from DockerHub.

kind: pipeline
type: kubernetes
name: default

steps:
- name: test
  image: ruby
  commands:
  - bundle install --jobs=3 --retry=3
  - rake

Please note that you can use any Docker image in your pipeline from any Docker registry. You can use the official ruby images, or your can bring your own.

Dependencies

If you decide to split your pipeline into multiple steps you need to make sure each step has access to project dependencies. Dependencies are downloaded to /usr/local/bundle which is outside of the shared workspace. Create a named volume to share this directory with all pipeline steps:

kind: pipeline
type: kubernetes
name: default

steps:
- name: install
  image: ruby
  volumes:
  - name: bundle
    path: /usr/local/bundle
  commands:
  - bundle install --jobs=3 --retry=3

- name: test
  image: ruby
  volumes:
  - name: bundle
    path: /usr/local/bundle
  commands:
  - rake

volumes:
- name: bundle
  temp: {}

Test Multiple Versions

You can use Drone’s multi-pipeline feature to concurrently test against multiple versions of Ruby. This is equivalent to matrix capabilities found in other continuous integration systems.

---
kind: pipeline
type: kubernetes
name: ruby-2-4

steps:
- name: test
  image: ruby:2.4
  commands:
  - bundle install --jobs=3 --retry=3
  - rake

---
kind: pipeline
type: kubernetes
name: ruby-2-3

steps:
- name: test
  image: ruby:2.3
  commands:
  - bundle install --jobs=3 --retry=3
  - rake

...

If you find this syntax too verbose we recommend using jsonnet. If you are unfamiliar with jsonnet please read our guide.

local Pipeline(name, image) = {
  kind: "pipeline",
  type: "kubernetes",
  name: name,
  steps: [
    {
      name: "test",
      image: image,
      commands: [
        "bundle install --jobs=3 --retry=3",
        "rake"
      ]
    }
  ]
};

[
  Pipeline("ruby23", "ruby:2.3"),
  Pipeline("ruby24", "ruby:2.4"),
]

Test Multiple Architectures

You can use Drone’s multi-pipeline feature to concurrently test your code on multiple architectures and operating systems.

---
kind: pipeline
type: kubernetes
name: test-on-amd64

platform:
  arch: amd64

steps:
- name: test
  image: ruby
  commands:
  - bundle install --jobs=3 --retry=3
  - rake

---
kind: pipeline
type: kubernetes
name: test-on-arm64

platform:
  arch: arm64

steps:
- name: test
  image: ruby
  commands:
  - bundle install --jobs=3 --retry=3
  - rake

...

If you find this syntax too verbose we recommend using jsonnet. If you are unfamiliar with jsonnet please read our guide.