GitLab CI pipelines

You can start by having a quick to the official introduction to pipelines and jobs documentation.

We are going to see how to make a pipeline as follows:

graph LR;
  subgraph build
  B(mvn compile);
  end
  subgraph test
  C(mvn test);
  end
  B-->C

Artifacts

In order to use compilation build results in the test job, compilation results have to be saved as an artifact.

Let's modify the .gitlab-ci.yml file as follows :

stages:
    - build
    - test

job_build:
  stage: build
  tags:
    - linux
  script:
    - cd java
    - mvn compile
  artifacts:
    expire_in: 2 hrs
    paths:
      - java/target/

1. the test stage is added
2. mvn compile compiles under target directory.
3. java/target folder is saved as an artifact

⚠️ Beware: The artifacts require to be ignored by git for not to face conflicts between jobs. Check java/target/ folder is present in the .gitignore file.

Exercise

Add a job_unit_test as a test stage that runs the unitary tests of the project.

⚠️ Note: Do not forget to add a dependency on job_build.

Commit and push the .gitlab-ci.yml file and check the job_unit_test is ✔️ passed.

Tips and tricks

You can use GitLab CI linter to validate your .gitlab-ci.yml file before pushing it.

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