[[353787]]

 在使用Pipeline項目時 一般都是參數化構建工作，在Jenkins的構建需要使用參數類型有復選框，單選按鈕，多選值等輸入的情景。

轉到→管理Jenkins→選擇管理插件→選擇可用選項卡，然后搜索主動選擇插件。安裝并重新啟動Jenkins，以正確安裝插件。我的已經安裝好，因此在“已安裝”標簽中列出。

主動選擇參數

使用Groovy腳本或Scriptler目錄中的腳本為生成參數動態生成值選項列表。參數可以動態更新，呈現為組合框，復選框，單選按鈕或豐富的HTML UI窗口小部件。

 按住Ctrl 就可以多選了。 

主動選擇反應參數

當作業中UI控件的值發生更改時，可以動態更新(主動選擇和響應參考參數) 這里可以使用IF進行條件判斷，輸出相關的值。

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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