使用Active Choice Parameter参数化构建

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 在使用Pipeline项目时 一般都是参数化构建工作，在Jenkins的构建需要使用参数类型有复选框，单选按钮，多选值等输入的情景。

转到→管理Jenkins→选择管理插件→选择可用选项卡，然后搜索主动选择插件。安装并重新启动Jenkins，以正确安装插件。我的已经安装好，因此在“已安装”标签中列出。

主动选择参数

使用Groovy脚本或Scriptler目录中的脚本为生成参数动态生成值选项列表。参数可以动态更新，呈现为组合框，复选框，单选按钮或丰富的HTML UI窗口小部件。

 按住Ctrl 就可以多选了。 

主动选择反应参数

当作业中UI控件的值发生更改时，可以动态更新(主动选择和响应参考参数) 这里可以使用IF进行条件判断，输出相关的值。

Jenkinsfile

properties([ 
    parameters([ 
        [$class: 'ChoiceParameter',  
            choiceType: 'PT_SINGLE_SELECT',  
            description: 'Select the Env Name from the Dropdown List',  
            filterLength: 1,  
            filterable: true,  
            name: 'Env',  
            randomName: 'choice-parameter-5631314439613978',  
            script: [ 
                $class: 'GroovyScript',  
                fallbackScript: [ 
                    classpath: [],  
                    sandbox: false,  
                    script:  
                        'return[\'Could not get Env\']' 
                ],  
                script: [ 
                    classpath: [],  
                    sandbox: false,  
                    script:  
                        'return["Dev","QA","Stage","Prod"]' 
                ] 
            ] 
        ],  
        [$class: 'CascadeChoiceParameter',  
            choiceType: 'PT_SINGLE_SELECT',  
            description: 'Select the Server from the Dropdown List',  
            filterLength: 1,  
            filterable: true,  
            name: 'Server',  
            randomName: 'choice-parameter-5631314456178619',  
            referencedParameters: 'Env',  
            script: [ 
                $class: 'GroovyScript',  
                fallbackScript: [ 
                    classpath: [],  
                    sandbox: false,  
                    script:  
                        'return[\'Could not get Environment from Env Param\']' 
                ],  
                script: [ 
                    classpath: [],  
                    sandbox: false,  
                    script:  
                        ''' if (Env.equals("Dev")){ 
                                return["devaaa001","devaaa002","devbbb001","devbbb002","devccc001","devccc002"] 
                            } 
                            else if(Env.equals("QA")){ 
                                return["qaaaa001","qabbb002","qaccc003"] 
                            } 
                            else if(Env.equals("Stage")){ 
                                return["staaa001","stbbb002","stccc003"] 
                            } 
                            else if(Env.equals("Prod")){ 
                                return["praaa001","prbbb002","prccc003"] 
                            } 
                        ''' 
                ] 
            ] 
        ] 
    ]) 
]) 
 
pipeline { 
  environment { 
         vari = "" 
  } 
  agent any 
  stages { 
      stage ("Example") { 
        steps { 
         script{ 
          echo 'Hello' 
          echo "${params.Env}" 
          echo "${params.Server}" 
          if (params.Server.equals("Could not get Environment from Env Param")) { 
              echo "Must be the first build after Pipeline deployment.  Aborting the build" 
              currentBuild.result = 'ABORTED' 
              return 
          } 
          echo "Crossed param validation" 
        } } 
      } 
  } 
} 

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