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node.js - sls 离线云端命令给出错误 webpack 插件找不到配置文件... webpack.config.js

问题描述

我正在开发一个使用 AWS Lambda 和无服务器 (sls)技术的项目。当尝试运行npm startwhich runssls offline cloudside我得到错误：

  The webpack plugin could not find the configuration file at: c:\Play\MyProj\src\myproj-backend\services\user-service\d:\Play\MyProj\src\myproj-backend\services\user-service\node_modules\serverless-bundle\src\webpack.config.js

完整的输出是：

npm start
> users-service@1.0.0 start c:\Play\MyProj\src\myproj-backend\services\user-service
> sls offline cloudside

Serverless: Deprecation warning: Starting with version 3.0.0, following property will be replaced:
              "provider.iamRoleStatements" -> "provider.iam.role.statements"
            More Info: https://www.serverless.com/framework/docs/deprecations/#PROVIDER_IAM_SETTINGS
Serverless: Deprecation warning: Resolution of lambda version hashes was improved with better algorithm, which will be used in next major release.
            Switch to it now by setting "provider.lambdaHashingVersion" to "20201221"
            More Info: https://www.serverless.com/framework/docs/deprecations/#LAMBDA_HASHING_VERSION_V2
Serverless: Loading cloudside resources for 'users-service-dev' stack.

 Serverless Error ----------------------------------------

  The webpack plugin could not find the configuration file at: c:\Play\MyProj\src\myproj-backend\services\user-service\d:\Play\MyProj\src\myproj-backend\services\user-service\node_modules\serverless-bundle\src\webpack.config.js

  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com

  Your Environment Information ---------------------------
     Operating System:          win32
     Node Version:              12.16.2
     Framework Version:         2.30.2
     Plugin Version:            4.5.1
     SDK Version:               4.2.0
     Components Version:        3.7.3

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! users-service@1.0.0 start: `sls offline cloudside`
npm ERR! Exit status 1

但奇怪的是，同一个 git 项目可以在我使用的另一个开发盒上运行。 知道为什么这不起作用吗？

标签： node.jsaws-lambda

解决方案

其原因很奇怪，很可能与涉及 SYMLINKD 目录时 nodejs 在 windows 上解析文件的方式有关。没有其他人可能会出现此错误，但他们可能会因此发布我的答案。

我的主机有两个磁盘：c: 和 d:。为了与我的其他机器保持一致，我在 c:\play 上完成了所有工作，这样对我来说更简单。在有问题的主机上，我创建了一个 SYMLINKD from c:\playto d:\play。下面是dir显示我在说什么的命令的输出：

c:\>dir
04/12/2020  07:59 PM    <SYMLINKD>     Play [d:\Play]

因此，当我进入 c:\Play 目录时，它实际上进入了 d:\Play 目录，因此以下两个命令将我放入完全相同的目录：

cd /d c:\play\myproj\myproj-backend-services\user-service
cd /d d:\play\myproj\myproj-backend-services\user-service

当我运行文件sls offline cloudside时webpack.config.js找不到。构建正在寻找文件：

c:\Play\MyProj\src\myproj-backend\services\user-service\d:\Play\MyProj\src\myproj-backend\services\user-service\node_modules\serverless-bundle\src\webpack.config.js

经过仔细检查，我意识到文件名已损坏，并且某些东西将两个目录粘在一起。即这两个字符串被粘在一起以制作webpack.config.js文件。

c:\Play\MyProj\src\myproj-backend\services\user-service\
d:\Play\MyProj\src\myproj-backend\services\user-service\node_modules\serverless-bundle\src\webpack.config.js

该webpack.config.js文件确实存在，当我更改为 D: 驱动器时，一切都按预期工作。 警告我的错误输出行是：

The webpack plugin could not find the configuration file at: c:\Play\MyProj\src\myproj-backend\services\user-service\d:\Play\MyProj\src\myproj-backend\services\user-service\node_modules\serverless-bundle\src\webpack.config.js

因此，如果 Windows 中的其他任何人使用过 SYMLINKD（请参阅mklink /d），那么您也可能会遇到这个问题。

正常工作时（从 D: 驱动器运行），输出为：

d:\Play\MyProj\src\myproj-backend\services\user-service>npm start

> users-service@1.0.0 start d:\Play\MyProj\src\myproj-backend\services\user-service
> sls offline cloudside

Serverless: Deprecation warning: Starting with version 3.0.0, following property will be replaced:
              "provider.iamRoleStatements" -> "provider.iam.role.statements"
            More Info: https://www.serverless.com/framework/docs/deprecations/#PROVIDER_IAM_SETTINGS
Serverless: Deprecation warning: Resolution of lambda version hashes was improved with better algorithm, which will be used in next major release.
            Switch to it now by setting "provider.lambdaHashingVersion" to "20201221"
            More Info: https://www.serverless.com/framework/docs/deprecations/#LAMBDA_HASHING_VERSION_V2
Serverless: Loading cloudside resources for 'users-service-dev' stack.
Serverless: Bundling with Webpack...
Serverless: Watching for changes...
offline: Starting Offline: dev/us-east-1.
offline: Offline [http for lambda] listening on http://localhost:3002
offline: Function names exposed for local invocation by aws-sdk:
           * createUser: users-service-dev-createUser
           * getUser: users-service-dev-getUser
           * signup: users-service-dev-signup
           * login: users-service-dev-login

   ┌──────────────────────────────────────────────────────────────────────────────┐
   │                                                                              │
   │   POST | http://localhost:4321/dev/user/create                               │
   │   POST | http://localhost:4321/2015-03-31/functions/createUser/invocations   │
   │   GET  | http://localhost:4321/dev/user                                      │
   │   POST | http://localhost:4321/2015-03-31/functions/getUser/invocations      │
   │   POST | http://localhost:4321/dev/user/signup                               │
   │   POST | http://localhost:4321/2015-03-31/functions/signup/invocations       │
   │   POST | http://localhost:4321/dev/user/login                                │
   │   POST | http://localhost:4321/2015-03-31/functions/login/invocations        │
   │                                                                              │
   └──────────────────────────────────────────────────────────────────────────────┘

offline: [HTTP] server ready: http://localhost:4321 �
offline:
offline: Enter "rp" to replay the last request

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