vscode 扩展开发：npm tar 模块 + 拒绝承诺未在 1 秒内处理答案

【问题标题】：vscode extension development: npm tar module + rejected promise not handled within 1 secondvscode 扩展开发：npm tar 模块 + 拒绝承诺未在 1 秒内处理
【发布时间】：2021-02-11 11:27:39
【问题描述】：

我正在开发一个 vscode 扩展，我需要在其中创建当前工作区文件夹的 tar 文件（工作区文件夹中的所有文件都将被 tar 化）。我正在使用npm tar module。我已经用 vscode 注册了命令，当我运行它并点击命令时，我得到以下错误。

rejected promise not handled within 1 second: Error: EROFS: read-only file system, open 'mysampletar.tar' 
stack trace: Error: EROFS: read-only file system, open 'mysampletar.tar'

在命令执行时运行的代码如下：

export function tarit(): void {
    let workspaceFolder = vscode.workspace.workspaceFolders;
    let path: string;
    if (!workspaceFolder) {
        path = vscode.workspace.rootPath || '';
    } else {
        let root: vscode.WorkspaceFolder;
        if (workspaceFolder.length === 1) {
            root = workspaceFolder[0];
            path = root.uri.fsPath;

            console.log('path', path); // logs /Users/vishwakumar/vscode-ext/sample-tar

            let tarz = require('tar');
            tarz.c({
                gzip: true,
                file: 'mysampletar.tar',
                onwarn: (code: any, message: any, data: any) => {
                    console.log('code', code);
                    console.log('message', message);
                    console.log('data', data);
                }
            },
                ['/Users/vishwakumar/vscode-ext/sample-tar/dummy.txt']
            ).then(() => {
                vscode.window.showInformationMessage('tar file generated');
            }).then((undefined: undefined, err: any) => {
                console.log('I am error', err);
             });
        }
    }
}

可能是什么问题？我想它正在尝试读取 tar 文件，我们如何停止读取以及在哪里可以看到创建的 tar？

谁能给我指点 npm tar 的例子？

【问题讨论】：

标签： node.js npm visual-studio-code tar

【解决方案1】：

经过多次试验和错误并多次阅读文档找到了解决方案，这里是工作代码。问题是 cwd 选项默认设置为 process.cwd()，您需要将其设置为您要存档的文件夹或文件所在的目录

export function tarit(): void {
        let workspaceFolder = vscode.workspace.workspaceFolders;
        let path: string;
        if (!workspaceFolder) {
            path = vscode.workspace.rootPath || '';
        } else {
            let root: vscode.WorkspaceFolder;
            if (workspaceFolder.length === 1) {
                root = workspaceFolder[0];
                path = root.uri.fsPath;
    
                console.log('path', path); // logs /Users/vishwakumar/vscode-ext/sample-tar
    
                let tarz = require('tar');
                tarz.c({
                    gzip: true,
                    file: '/Users/vishwakumar/vscode-ext/sample-tar/mysampletar.tar', // this is the location where the tar file will be generated
                    cwd: '/Users/vishwakumar/vscode-ext/', // set current working directory to parent directory 
                    onwarn: (code: any, message: any, data: any) => {
                        console.log('code', code);
                        console.log('message', message);
                        console.log('data', data);
                    }
                },
                    ['sample-tar'], // set file list to directory which needs to be archived, this will tar all the files and folders inside recursively, 
                    () => {}        // third parameter is a empty callback, which will be called after tar completion
                ).then(() => {
                    vscode.window.showInformationMessage('tar file generated');
                }).then((undefined: undefined, err: any) => {
                    console.log('I am error', err);
                 });
            }
        }
    }

【讨论】：