jenkinsfile变量传递

pipeline {
    agent any
    environment {
        ZIP_NODE = "xyz.zip"
    }
    stages {
        stage ('test1') {
            steps {
                script {
                    ZIP_NODE = "abc.zip"
                }
            }
        }
        
        stage ('test2') {
            steps {
                script {
                    ZIP_NODE = "def.zip"
                }
            }
        }
        stage ('test3') {
            steps {
                script{
                    //打印结果def.zip,在script 内、sh外，双引号，打印的是被赋值后的全局变量
                    sh "echo ${ZIP_NODE}"   
                    sh """
                       echo ${ZIP_NODE}   #打印结果def.zip,在script内sh 内,3双引号，打印的是被赋值后的全局变量
                    """
                    sh '''
                       echo ${ZIP_NODE}   #打印结果xyz.zip, 3单引号打印出来的是environment中设置的变量值
                    '''
                }
            }
        } 
    }
}

假如在sh里面赋值就会报错，如下：

pipeline {
    agent any
    environment {
        ZIP_NODE = "xyz.zip"
    }
    stages {
        stage ('test1') {
            steps {
                script {
                    sh '''
                    ZIP_NODE = "abc.zip"
                    '''
                }
            }
        }
        stage ('test2') {
            steps {
                script{
                    //打印结果abc.zip,在script 内,sh外，双引号，打印的是被赋值后的全局变量
                    echo "${ZIP_NODE}"   
                    sh """
                       echo ${ZIP_NODE}   #打印结果abc.zip,在script内sh 内,3双引号，打印的是被赋值后的全局变量
                    """
                    sh '''
                       echo ${ZIP_NODE}   #打印结果xyz.zip, 3单引号打印出来的是environment中设置的变量值
                    '''
                }
            }
        } 
    }
}