How can I list all the env properties within a Jenkins pipeline

Question

Given a jenkins 2.1 build pipeline, jenkins injects a env variable into the node{}. For example, BRANCH_NAME can be accessed with

node {

    echo ${env.BRANCH_NAME}

    ...

I want to echo all env properties within the jenkins pipeline.

I'm looking for code like

node {

    for(e in env){

        echo e + " is " + ${e}

    }

    ...

which would echo something like

 BRANCH_NAME is myBranch2

 CHANGE_ID is 44

 ...

Answer 1

One way of doing this is :

node {

echo sh(returnStdout: true, script: 'env')

// ..

}

Another way is:

According to Jenkins documentation for declarative pipeline use :

sh 'printenv'

And for Jenkins scripted pipeline use:

echo sh(script: 'env|sort', returnStdout: true)

Answer 2

Here's a quick script you can add as a pipeline job to list all environment variables:

node {
    echo(env.getEnvironment().collect({environmentVariable ->  "${environmentVariable.key} = ${environmentVariable.value}"}).join("\n"))
    echo(System.getenv().collect({environmentVariable ->  "${environmentVariable.key} = ${environmentVariable.value}"}).join("\n"))
}

This will list both system and Jenkins variables