尽管安装了 npm，Gatsby 还是找不到 fs

Question

我上线了：

• Ubuntu 16.04
• 盖茨比 CLI 版本：2.7.14
• 盖茨比版本：2.13.21
• 节点 v10.16.0
• 新公共管理 6.10.1

我正在关注 Gatsby 教程“7. 以编程方式从数据创建页面”。我无法解决此错误：

This dependency was not found:
?
* fs in ./node_modules/electron/index.js,
?
To install it, you can run: npm install --save fs

我已经跑npm install --save fs了，然后又试了一次。但是会出现同样的错误。目录的权限设置为a+rwx，到目前为止一切都安装得很好。

当我将此代码添加到 gatsby-node.js 时会发生此错误，如教程所述：

const { createFilePath } = require(`gatsby-source-filesystem`)

exports.onCreateNode = ({ node, getNode }) => {
  if (node.internal.type === `MarkdownRemark`) {
    console.log(createFilePath({ node, getNode, basePath: `pages` }))
  }
}

我运行时的完整事件流程gatsby develop -p 8001：

success open and validate gatsby-configs - 0.070 s
success load plugins - 0.636 s
success onPreInit - 0.005 s
success initialize cache - 0.012 s
success copy gatsby files - 0.092 s
success onPreBootstrap - 0.026 s
success source and transform nodes - 0.145 s
success building schema - 0.560 s
success createPages - 0.003 s
success createPagesStatefully - 0.078 s
success onPreExtractQueries - 0.004 s
success update schema - 0.087 s
success extract queries from components - 0.340 s
success write out requires - 0.009 s
success write out redirect data - 0.006 s
success onPostBootstrap - 0.003 s
?
info bootstrap finished - 9.246 s
?
success run static queries - 0.051 s — 1/1 23.83 queries/second
success run page queries - 0.040 s — 3/3 135.00 queries/second
 ERROR  Failed to compile with 7 errors                     10:01:07 PM
?
This dependency was not found:
?
* fs in ./node_modules/electron/index.js,
?
To install it, you can run: npm install --save fs
? ?wdm?:
ERROR in ./node_modules/electron/index.js
Module not found: Error: Can't resolve 'fs' in
'/home/testjs/tutorial-part-four/node_modules/electron'
 @ ./node_modules/electron/index.js 1:9-22
 @ ./node_modules/gatsby-source-filesystem/node_modules/got/index.js
 @ ./node_modules/gatsby-source-filesystem/create-remote-file-node.js
 @ ./node_modules/gatsby-source-filesystem/index.js
 @ ./src/pages/gatsby-node.js
 @ ./.cache/sync-requires.js
 @ ./.cache/app.js
 @ multi ./node_modules/event-source-polyfill/src/eventsource.js
(webpack)-hot-middleware/client.js?path=/__webpack_hmr&reload=true&over
lay=false ./.cache/app

ERROR in ./node_modules/fs-extra/lib/empty/index.js
Module not found: Error: Can't resolve 'fs' in
'/home/testjs/tutorial-part-four/node_modules/fs-extra/lib/empty'
 @ ./node_modules/fs-extra/lib/empty/index.js 4:11-24
 @ ./node_modules/fs-extra/lib/index.js
 @ ./node_modules/gatsby-source-filesystem/index.js
 @ ./src/pages/gatsby-node.js
 @ ./.cache/sync-requires.js
 @ ./.cache/app.js
 @ multi ./node_modules/event-source-polyfill/src/eventsource.js
(webpack)-hot-middleware/client.js?path=/__webpack_hmr&reload=true&over
lay=false ./.cache/app

ERROR in ./node_modules/graceful-fs/graceful-fs.js
Module not found: Error: Can't resolve 'fs' in
'/home/testjs/tutorial-part-four/node_modules/graceful-fs'
 @ ./node_modules/graceful-fs/graceful-fs.js 1:9-22
 @ ./node_modules/fs-extra/lib/fs/index.js
 @ ./node_modules/fs-extra/lib/index.js
 @ ./node_modules/gatsby-source-filesystem/index.js
 @ ./src/pages/gatsby-node.js
 @ ./.cache/sync-requires.js
 @ ./.cache/app.js
 @ multi ./node_modules/event-source-polyfill/src/eventsource.js
(webpack)-hot-middleware/client.js?path=/__webpack_hmr&reload=true&over
lay=false ./.cache/app

ERROR in ./node_modules/jsonfile/index.js
Module not found: Error: Can't resolve 'fs' in
'/home/testjs/tutorial-part-four/node_modules/jsonfile'
 @ ./node_modules/jsonfile/index.js 5:8-21
 @ ./node_modules/fs-extra/lib/json/jsonfile.js
 @ ./node_modules/fs-extra/lib/json/index.js
 @ ./node_modules/fs-extra/lib/index.js
 @ ./node_modules/gatsby-source-filesystem/index.js
 @ ./src/pages/gatsby-node.js
 @ ./.cache/sync-requires.js
 @ ./.cache/app.js
 @ multi ./node_modules/event-source-polyfill/src/eventsource.js
(webpack)-hot-middleware/client.js?path=/__webpack_hmr&reload=true&over
lay=false ./.cache/app

ERROR in ./node_modules/md5-file/index.js
Module not found: Error: Can't resolve 'fs' in
'/home/testjs/tutorial-part-four/node_modules/md5-file'
 @ ./node_modules/md5-file/index.js 4:9-22
 @ ./node_modules/gatsby-source-filesystem/create-file-node.js
 @
./node_modules/gatsby-source-filesystem/create-file-node-from-buffer.js
 @ ./node_modules/gatsby-source-filesystem/index.js
 @ ./src/pages/gatsby-node.js
 @ ./.cache/sync-requires.js
 @ ./.cache/app.js
 @ multi ./node_modules/event-source-polyfill/src/eventsource.js
(webpack)-hot-middleware/client.js?path=/__webpack_hmr&reload=true&over
lay=false ./.cache/app

ERROR in ./node_modules/read-chunk/index.js
Module not found: Error: Can't resolve 'fs' in
'/home/testjs/tutorial-part-four/node_modules/read-chunk'
 @ ./node_modules/read-chunk/index.js 2:11-24
? ?wdm?: Failed to compile.

我在谷歌上搜索了这个错误，它在几个上下文中弹出，没有一个与 Gatsby 的情况相匹配。我是 React 和 Gatsby 的新手（因此是教程），所以我还不知道如何处理这个问题。我该如何解决？

Answer 1

尝试编辑文件gatsby-node.js（或在源根目录中创建它）并添加以下行：

exports.onCreateWebpackConfig = ({ actions, loaders, getConfig }) => {
    const config = getConfig()
    config.node = {
        fs: 'empty'
    }
}

这将修改您的 Webpack 配置并应解决问题