SvelteKit 无法解决依赖关系，即使它是外部的

Question

我正在制作一个用户身份验证页面，就此而言，我正在使用 bcrypt 进行哈希处理。一切都很好，直到我在代码中实际使用 bcrypt 模块。运行它在开发模式下工作完全正常，在预览构建时它运行完全正常，但在构建过程中发生错误，部署时导致它停止构建并出错。

这是错误：

> Using @sveltejs/adapter-vercel
 > node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:43:28: error: Could not resolve "mock-aws-s3" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
    43 │     const AWSMock = require('mock-aws-s3');
       ╵                             ~~~~~~~~~~~~~

 > node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:76:22: error: Could not resolve "aws-sdk" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
    76 │   const AWS = require('aws-sdk');
       ╵                       ~~~~~~~~~

 > node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:112:23: error: Could not resolve "nock" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
    112 │   const nock = require('nock');
        ╵                        ~~~~~~

> Build failed with 3 errors:
node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:43:28: error: Could not resolve "mock-aws-s3" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:76:22: error: Could not resolve "aws-sdk" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:112:23: error: Could not resolve "nock" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
Error: Build failed with 3 errors:
node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:43:28: error: Could not resolve "mock-aws-s3" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:76:22: error: Could not resolve "aws-sdk" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
node_modules/@mapbox/node-pre-gyp/lib/util/s3_setup.js:112:23: error: Could not resolve "nock" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time)
    at failureErrorWithLog (/home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:1493:15)
    at /home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:1151:28
    at runOnEndCallbacks (/home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:1069:65)
    at buildResponseToResult (/home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:1149:7)
    at /home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:1258:14
    at /home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:629:9
    at handleIncomingPacket (/home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:726:9)
    at Socket.readFromStdout (/home/joshgil/Codes/TouchOfClassEvents/node_modules/esbuild/lib/main.js:596:7)
    at Socket.emit (node:events:390:28)
    at Socket.emit (node:domain:475:12)

我按照错误所说的进行操作，并将这些包标记为外部包，但仍然无法正常工作，这是我的 svelte.config.js

// svelte.config.js
import sveltePreprocess from 'svelte-preprocess';
import makeAttractionsImporter from 'attractions/importer.js';
import vercel from '@sveltejs/adapter-vercel';
import path, { dirname, resolve } from 'path';
import { fileURLToPath } from 'url';

const __dirname = dirname(fileURLToPath(import.meta.url));

/** @type {import('@sveltejs/kit').Config} */
const config = {
    // Consult https://github.com/sveltejs/svelte-preprocess
    // for more information about preprocessors
    preprocess: sveltePreprocess({
        postcss: true,
        scss: {
            importer: makeAttractionsImporter({
                themeFile: path.join(__dirname, 'static/css/theme.scss')
            }),
            includePaths: [path.join(__dirname, './static/css')]
        }
    }),

    kit: {
        // hydrate the <div id="svelte"> element in src/app.html
        target: '#svelte',
        adapter: vercel(),
        vite: {
            optimizeDeps: {
                exclude: ['bcrypt']
            },
            ssr: {
                external: ['mock-aws-s3', 'aws-sdk', 'nock', 'node-pre-gyp']
            },
            resolve: {
                alias: {
                    $lib: resolve('src/lib'),
                    $components: resolve('src/components'),
                    $utils: resolve('src/utils')
                }
            }
        }
    }
};

export default config;

我开始调查它，问题似乎是由 node-pre-gyp 引起的，所以我也在配置中将其标记为外部，但它仍然产生相同的确切错误。

似乎问题出在 node-pre-gyp 试图解析 bcrypt 的 C++ 二进制文件时，它只在构建时出错，当它被强制运行时，它运行s非常好。

Answer 1

我发现的一个解决方案是只在 package.json 中包含这些依赖项 "nock", "mock-aws-s3", "aws-sdk"，这将解决问题，但不是预期的方式，因为这意味着捆绑包将更大，因为客户端不需要 3 个额外的依赖项。

希望有更好的解决办法！

这个解决方案的警告是，包的大小当然会更大，我希望它不会大很多。

Answer 2

我在使用 bcrypt 和 argon2 时遇到了同样的问题，因为它们都依赖于 node-pre-gyp 并进行了一些挖掘，并在纯 javascript.

中找到了 bcrypt 的实现

请注意，它很可能比 C 实现慢，但它确实可以在生产 Sveltekit 环境中工作，并在 Vercel 上进行了测试。

这是 bcryptjs 包：https://www.npmjs.com/package/bcryptjs

Answer 3

我有同样的问题，但 @googlemaps/js-api-loader 包。我在 SvelteKit repo https://github.com/sveltejs/kit/issues/928

中找到了关于这个问题的讨论

我通过 updating svelte.config.js 修复了它，如下所示：

vite: {
  ssr: {
    noExternal: ['@googlemaps/js-api-loader']
  }
}

Answer 4

Vercel 已发布 article 关于某些库（尤其是 bcrypt）在本地工作但由于缺少本机依赖项而不在无服务器功能上工作。他们建议要么选择替代包，要么在构建映像中安装必要的共享库。

bcryptjs 对我来说工作得很好。缺点确实是速度较慢（慢30%）。

SvelteKit 无法解决依赖关系，即使它是外部的

SvelteKit could not resolve dependency even though it's external

bcrypt

sveltekit