Jenkins Global environment variables in Jenkinsfile

Question

How do I invoke Global environment variables in Jenkinsfile?
For example, if I have a variable -

 name:credentialsId 
 value:xxxx-xxxx-xxxxx-xxxxxxxxx
         


        

Answer 1

In a Jenkinsfile, you have the "Working with the Environment" which mentions:

The full list of environment variables accessible from within Jenkins Pipeline is documented at localhost:8080/pipeline-syntax/globals#env,

The syntax is ${env.xxx} as in:

node {
    echo "Running ${env.BUILD_ID} on ${env.JENKINS_URL}"
}

See also "Managing the Environment".

How can I pass the Global variables to the Jenkinsfile?
When I say Global variables - I mean in

Jenkins -> Manage Jenkins -> Configure System -> Global properties -> Environment variables

See "Setting environment variables"

Setting an environment variable within a Jenkins Pipeline can be done with the withEnv step, which allows overriding specified environment variables for a given block of Pipeline Script, for example:

Jenkinsfile (Pipeline Script)

node {
    /* .. snip .. */
    withEnv(["NAME=value"]) {
        ... your job
    }
}