How to list all `env` properties within jenkins pipeline job?

Question

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

Answer 1

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.