How to set PATH in Jenkins Declarative Pipeline

Question

In Jenkins scripted pipeline you can set PATH env variable like this :

node {    git url: 'https://github.com/jglick/simple-maven-project-with-tests.git'    withEnv(["PATH+MAVEN=${tool 'M3'}/bin"]) {       sh 'mvn -B verify'    } } 

Notice the PATH+MAVEN as explained here https://jenkins.io/doc/pipeline/steps/workflow-basic-steps/#code-withenv-code-set-environment-variables :

A list of environment variables to set, each in the form VARIABLE=value or VARIABLE= to unset variables otherwise defined. You may also use the syntax PATH+WHATEVER=/something to prepend /something to $PATH.

But I didn't find how to do it in declarative pipeline using environment syntax (as explained here : https://jenkins.io/doc/pipeline/tour/environment).

environment {     DISABLE_AUTH = 'true'     DB_ENGINE    = 'sqlite' } 

Ideally I would like to update the PATH to use custom tools for all my stages.

Answer 1

It is possible with environment section:

pipeline {   agent { label 'docker' }   environment {     PATH = "/hot/new/bin:${env.PATH}"   }   stages {     stage ('build') {       steps {         echo "PATH is: ${env.PATH}"       }     }   } } 

See this answer for info.

Answer 2

As a workaround, you can define an environment variable and use it in the sh step:

pipeline {     environment {         MAVEN_HOME = tool('M3')     }      stages {         stage(Maven') {            sh '${MAVEN_HOME}/bin/mvn -B verify'         }     } }