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

I use Blue Ocean plugin and did not like each environment entry getting its own block. I want one block with all the lines.

Prints poorly:

sh 'echo `env`'

Prints poorly:

sh 'env > env.txt'
for (String i : readFile('env.txt').split("\r?\n")) {
    println i
}

Prints well:

sh 'env > env.txt'
sh 'cat env.txt'

Prints well: (as mentioned by @mjfroehlich)

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

Answer 2

You can get all variables from your jenkins instance. Just visit:

• ${jenkins_host}/env-vars.html
• ${jenkins_host}/pipeline-syntax/globals

Answer 3

You can accomplish the result using sh/bat step and readFile:

node {
    sh 'env > env.txt'
    readFile('env.txt').split("\r?\n").each {
        println it
    }
}

Unfortunately env.getEnvironment() returns very limited map of environment variables.