如何在声明性 Jenkins 管道的阶段之间传递变量? [英] How do I pass variables between stages in a declarative Jenkins pipeline?

问题描述

如何在声明性管道的阶段之间传递变量?

How do I pass variables between stages in a declarative pipeline?

在脚本化管道中，我收集的过程是写入临时文件，然后将文件读入变量.

In a scripted pipeline, I gather the procedure is to write to a temporary file, then read the file into a variable.

如何在声明式管道中执行此操作?

How do I do this in a declarative pipeline?

例如我想根据 shell 操作创建的变量触发不同作业的构建.

E.g. I want to trigger a build of a different job, based on a variable created by a shell action.

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})]
    }
}

推荐答案

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)，你可以使用 readFile 作为见下.如果没有，请使用 sh 和 script 选项，如下所示:

If you want to use a file (since a script is the thing generating the value you need), you could use readFile as seen below. If not, use sh with the script option as seen below:

// Define a groovy local variable, myVar.
// A global variable without the def, like myVar = 'initial_value',
// was required for me in older versions of jenkins. 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.
def myVar = 'initial_value'

pipeline {
  agent { label 'docker' }
  stages {
    stage('one') {
      steps {
        echo "1.1. ${myVar}" // prints '1.1. 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()
        }
        echo "1.2. ${myVar}" // prints '1.2. hotness'
      }
    }
    stage('two') {
      steps {
        echo "2.1 ${myVar}" // prints '2.1. hotness'
        sh "echo 2.2. sh ${myVar}, Sergio" // prints '2.2. sh hotness, Sergio'
      }
    }
    // this stage is skipped due to the when expression, so nothing is printed
    stage('three') {
      when {
        expression { myVar != 'hotness' }
      }
      steps {
        echo "three: ${myVar}"
      }
    }
  }
}

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