Continuous Integration with Clojure

This page explains yml configuration that is specific to Clojure projects. For a complete yml reference, please read the YML structure page

Our yml configuration is highly customizable. Please read the following sections carefully to learn how to configure your builds.

Basic configuration

The following shippable.yml should get you started with a simple Clojure project.

language: clojure

lein:
  - lein2

The snippet above will run the default command lein test. To customize this configuration, please read the sections below.

Setting language and runtime

For Clojure projects, the language tag should always be set to clojure. You can set the runtime to any version(s) using the lein tag:

language: clojure

lein:
  - 1.9.0

Our official build images, which are used to run your builds by default, come installed with multiple versions of Clojure.

To find out which versions are supported out of the box for your build image, read our languages overview for Clojure.

If you want to test against several versions of Clojure, you can specify multiple runtimes. The snippet below will trigger 2 builds, one against each version:

lein:
  - 1.9.0
  - 1.8.0

Important note: The runtime tag only works with official CI images provided by Shippable. If you are using a custom image for your build, you will need to switch the runtime in the ci section of your yml.

Preparing your environment

If you're running a simple Scala build, feel free to skip this section since you should not have to do anything to prepare the environment. Read this section only if your build needs specific environment variables or you have very custom requirements for your build image.

Overriding the default build image

Depending on the language tag in your yml, an official build image is chosen for your build by default, and your build container is started with standard options. To find out the default image used for your builds, please read the Machine images overview.

If the default image does not satisfy your requirements, you can do one of three things:

  • Continue using default image and include commands to install any missing dependencies or packages in your yml
  • Switch your Machine Image to a more recent version that contains what you need
  • Use a custom build image that contains exactly what you need for your CI. Please note that this will add time to your build since the image will be pulled from a registry.

Setting environment variables

You can define any custom environment variables in the env section of your yml. Please read the docs on Environment variables for more information.

Configuring build and test commands

The ci section should contain all commands you need for your ci workflow. Commands in this section are executed sequentially. If any command fails, we exit this section with a non zero exit code.

Installing dependencies

You can install the required dependencies for your project using protobuf:

build:
  ci:
    - lein protobuf install

Adding test commands

After installing dependencies, you can include your test commands. For example:

build:
  ci:
    - lein test

Test and code coverage

You can view your test and code coverage results in a consumable format and drill down further to find out which tests failed or which sections of your code were not covered by your tests.

Your tests results data needs to be in junit format and your code coverage results need to be in cobertura format in order to see these visualizations. Test and code coverage results need to be saved to shippable/testresults and shippable/codecoverage folders so that we can parse the reports.

Advanced config

Testing against multiple JDKs

You can test your projects against one or more supported JDKs: OpenJDK 7, Oracle JDK 7, Oracle JDK 8, OpenJDK 6.

Use the jdk flag to achieve this:

jdk:
  - openjdk7
  - oraclejdk7
  - oraclejdk8
  - openjdk6

The yml above will trigger 4 builds, one against each jdk version.

Default commands

If the ci section is blank, we will run a default command. This has the same effect as the yml snippet below:

build:
  ci:
    - lein test

To avoid executing the default command, include a simple command in like pwd or ls in this section.