如何在Jenkins Pipeline中正确使用CPS notation解决readJSON调用报错

@NonCPS注解的作用是标记完全不需要CPS转换的纯Groovy逻辑方法，这类方法内部禁止调用任何Jenkins Pipeline内置步骤。你为sendEmailNewErrors添加了@NonCPS注解，但该方法内部调用了readJSON、mail两个Jenkins内置步骤，两者逻辑冲突，因此触发方法匹配错误。

• 移除sendEmailNewErrors方法的@NonCPS注解，该方法包含Jenkins内置步骤，不允许使用该注解
• 保留findItemInChangelog的@NonCPS注解，该方法仅使用纯Groovy API处理XML，符合@NonCPS使用规则
• 将sendEmailNewErrors内的.each循环替换为普通for循环，不需要注解即可兼容CPS转换
• 建议后续将硬编码的构建号、文件路径替换为Jenkins内置环境变量（如BUILD_NUMBER），提升流水线通用性

import groovy.json.JsonSlurper

// 移除该方法的@NonCPS注解
def sendEmailNewErrors(){
        def submitter = findItemInChangelog("changeUser")
        def Emails = readJSON file: "D:/Emails.json"
        def email = "test@email.com"
        def msgList = []
        def url = "http://localhost:8080/job/job1/1374/cppcheck/new/api/json"
        def json = new JsonSlurper().parseText(new URL(url).text)

        for (key in Emails.keySet()) {
            if (submitter == key){
                email = Emails.get(key)
            }
        }

        // 替换each为普通for循环
        for (issue in json.issues) {
            def msg = "New ERROR found in static analysis, TYPE OF ERROR ${issue.type}"+
                ", SEVERITY: ${issue.severity}, ERROR MESSAGE: ${issue.message}"+
                ", FILE ${issue.fileName} AT LINE: ${issue.lineStart}"
            msgList.add(msg)
        }
                        
        // 替换each为普通for循环
        for (msg in msgList) {
            println msg
            mail to: email,
            subject: "New errors found in job1 build pipeline",
            body: "$msg"
        }
    
}

@NonCPS
def findItemInChangelog(item){
    def result = "Build ran manually"
    def found = false 
    def file = new XmlSlurper().parse("C:/Users/User/.jenkins/jobs/job1/builds/1374/changelog5966810591791724161.xml")
    file.entry.each { entry ->
        entry.changenumber.each { changenumber ->
            changenumber.children().each { tag ->
                if(tag.name() == item && found != true){
                    result = tag.text()
                    found = true
                }
            }
        }
    }
    return result.toString()
}

pipeline {
    agent any
    
    stages {    
        stage("test"){
            steps{
                script{
                    sendEmailNewErrors()
                }
            }
        }
    }
}

内容的提问来源于stack exchange，提问作者Jesus Fernandez