List All Environment Variables Using Jenkins Pipeline Script

In this post, we will go through the steps to retrieve and list all environment variables in Jenkins using a pipeline script. This is especially useful for debugging, auditing, or understanding the environment Jenkins is running in.

Step 1: Create a New Pipeline Job

• Navigate to your Jenkins Dashboard.
• Click on New Item to create a new job.
• Enter a name for your job, e.g., ListAllEnvVars.
• Select Pipeline from the available project types and click OK.

Step 2: Define the Pipeline Script

• In the Pipeline section, choose Pipeline script from the Definition dropdown.
• Enter the following pipeline script in the Script field:

pipeline {
    agent any

    stages {
        stage('List All Environment Variables') {
            steps {
                script {
                    echo "Listing all environment variables:"
                    
                    if (isUnix()) {
                        sh 'printenv'  // On Unix-based agents (Linux, macOS), use 'printenv'
                    } else {
                        bat 'set'  // On Windows agents, use 'set' to list environment variables
                    }
                }
            }
        }
    }
}
        

Step 3: Save the Pipeline Configuration

• After entering the pipeline script, scroll to the bottom of the page and click Save.

Step 4: Run the Pipeline Job

• Click on the job name in the Jenkins Dashboard.
• Under Build History, click Build Now to trigger the pipeline.

Step 5: View the Build Output

• Once the build completes, click on the build number in Build History.
• Click on Console Output to see the results.
• You will see the environment variables listed in the output.

Example