GitLab CI/CD: Print All Environment Variables

Environment variables are extremely useful as they bring a lot of flexibility to CI/CD jobs and pipelines in GitLab.

There are some predefined variables that are available in every GitLab CI/CD pipeline and custom variables that can be defined in different ways.

In this short note i will show how to list all the environment variables in GitLab CI/CD and print their values.

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Print All Environment Variables in GitLab CI/CD

To print all the environment variables set inside a GitLab CI/CD runner, create a .gitlab-ci.yml file with the contents as follows, or add this snipped to the already existent pipeline:

# .gitlab-ci.yml

stages:
  - debug

print-all-env-vars-job:
  stage: debug
  script:
    - echo "GitLab CI/CD | Print all environment variables"
    - env

Commit and push to remote to trigger the pipeline:

$ git add .gitlab-ci.yml 
$ git commit -m "Print all environment variables"
$ git push

On a GitLab’s UI, the above job should produce the output as follows:

...
$ echo "GitLab CI/CD | Print all environment variables"
GitLab CI/CD | Print all environment variables
$ env
CI_PROJECT_NAMESPACE=<userName>
GITLAB_USER_ID=<userId>
CI_RUNNER_VERSION=14.4.0-rc1
FF_SKIP_NOOP_BUILD_STAGES=true
CI_SERVER_NAME=GitLab
CI_RUNNER_DESCRIPTION=2-blue.shared.runners-manager.gitlab.com/default
GITLAB_USER_EMAIL=<userEmail>
CI_SERVER_REVISION=a01125bc237
FF_USE_WINDOWS_LEGACY_PROCESS_STRATEGY=true
CI_RUNNER_EXECUTABLE_ARCH=linux/amd64
...