如何在Jenkinsfile中获取拉取请求的变更文件列表？

pipeline {
    agent any
    
    stages {
        stage('Checkout') {
            steps {
                // 使用Git插件进行代码仓库的拉取
                git branch: 'master', url: 'https://github.com/example/repo.git'
            }
        }
        
        stage('Get Changed Files') {
            steps {
                script {
                    // 获取拉取请求的变更文件列表
                    def changeLogSets = currentBuild.changeSets
                    for (int i = 0; i < changeLogSets.size(); i++) {
                        def entries = changeLogSets[i].items
                        for (int j = 0; j < entries.length; j++) {
                            def entry = entries[j]
                            def files = entry.affectedFiles.collect { it.path }
                            echo "Changed files: ${files}"
                        }
                    }
                }
            }
        }
    }
}