如何在创建扩展时在VS代码中获取当前活动文件的确切路径

const vscode = require('vscode');

function getCurrentFilePath() {
    const activeEditor = vscode.window.activeTextEditor;
    if (activeEditor) {
        const document = activeEditor.document;
        if (document) {
            const uri = document.uri;
            if (uri) {
                return uri.fsPath;
            }
        }
    }
    return null;
}

// 示例用法
const currentFilePath = getCurrentFilePath();
if (currentFilePath) {
    console.log('当前活动文件的确切路径：', currentFilePath);
} else {
    console.log('没有活动文件');
}