如何在声明性Jenkins管道中的阶段之间传递变量？

Question

如何在声明性管道中的阶段之间传递变量？

在脚本管道中,我收集的程序是写入临时文件,然后将文件读入变量.

我如何在声明性管道中执行此操作？

例如,我想基于shell动作创建的变量触发不同作业的构建.

stage("stage 1") {
    steps {
        sh "do_something > var.txt"
        // I want to get var.txt into VAR
    }
}
stage("stage 2") {
    steps {
        build job: "job2", parameters[string(name: "var", value: "${VAR})]
    }
}

Answer 1

如果你想使用一个文件(因为脚本是生成你需要的值的东西):

// Define a groovy global variable, myVar.
// A local, def myVar = 'initial_value', didn't work for me.
// Your mileage may vary.
// Defining the variable here maybe adds a bit of clarity,
// showing that it is intended to be used across multiple stages.
myVar = 'initial_value'

pipeline {
  agent { label 'docker' }
  stages {
    stage('one') {
      steps {
        echo "${myVar}" // prints 'initial_value'
        sh 'echo hotness > myfile.txt'
        script {
          // OPTION 1: set variable by reading from file.
          // FYI, trim removes leading and trailing whitespace from the string
          myVar = readFile('myfile.txt').trim()

          // OPTION 2: set variable by grabbing output from script
          myVar = sh(script: 'echo hotness', returnStdout: true).trim()
        }
        echo "${myVar}" // prints 'hotness'
      }
    }
    stage('two') {
      steps {
        echo "${myVar}" // prints 'hotness'
      }
    }
    // this stage is skipped due to the when expression, so nothing is printed
    stage('three') {
      when {
        expression { myVar != 'hotness' }
      }
      steps {
        echo "three: ${myVar}"
      }
    }
  }
}

Answer 2

只是：

  pipeline {
        parameters {
            string(name: 'custom_var', defaultValue: '')
        }

        stage("make param global") {
             steps {
               tmp_param =  sh (script: 'most amazing shell command', returnStdout: true).trim()
               env.custom_var = tmp_param
              }
        }
        stage("test if param was saved") {
            steps {
              echo "${env.custom_var}"
            }
        }
  }

Answer 3

不需要（隐藏插件）参数定义或临时文件访问。跨阶段共享变量可以通过在 Jenkinsfile 中使用全局 Groovy 变量来完成，如下所示：

#!/usr/bin/env groovy 
def MYVAR

def outputOf(cmd) { return sh(returnStdout:true,script:cmd).trim(); }

pipeline {
    agent any    
    stage("stage 1") {
        steps {
            MYVAR = outputOf('echo do_something')
            sh "echo MYVAR has been set to: '${MYVAR}'"
        }
    }
    stage("stage 2") {
        steps {
            sh '''echo "...in multiline quotes: "''' + MYVAR + '''" ... '''
            build job: "job2", parameters[string(name: "var", value: MYVAR)]
        }
    }
}

Answer 4

我有一个类似的问题，因为我想要一个特定的管道来提供变量，而许多其他管道使用它来获取这个变量。

我创建了一个 my-set-env-variables 管道

script
{
    env.my_dev_version = "0.0.4-SNAPSHOT"
    env.my_qa_version  = "0.0.4-SNAPSHOT"
    env.my_pp_version  = "0.0.2"
    env.my_prd_version = "0.0.2"
    echo " My versions  [DEV:${env.my_dev_version}] [QA:${env.my_qa_version}] [PP:${env.my_pp_version}] [PRD:${env.my_prd_version}]"
}

我可以在另一个管道中重用这些变量 my-set-env-variables-test

script 
{
    env.dev_version = "NOT DEFINED DEV"
    env.qa_version  = "NOT DEFINED QA"
    env.pp_version  = "NOT DEFINED PP"
    env.prd_version = "NOT DEFINED PRD"
}

stage('inject variables') {

    echo "PRE DEV version = ${env.dev_version}"
    script 
    {
       def variables = build job: 'my-set-env-variables'
       def vars = variables.getBuildVariables()
      //println "found variables" + vars
      env.dev_version = vars.my_dev_version
      env.qa_version  = vars.my_qa_version
      env.pp_version  = vars.my_pp_version
      env.prd_version = vars.my_prd_version
    }
}

stage('next job') {
    echo "NEXT JOB DEV version = ${env.dev_version}"
    echo "NEXT JOB QA version = ${env.qa_version}"
    echo "NEXT JOB PP version = ${env.pp_version}"
    echo "NEXT JOB PRD version = ${env.prd_version}"

}