Gatsby cannot find fs despite npm install

问题

I'm on:

Ubuntu 16.04
Gatsby CLI version: 2.7.14
Gatsby version: 2.13.21
Node v10.16.0
NPM 6.10.1

I'm following the Gatsby tutorial "7. Programmatically create pages from data". I can't solve this error:

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

I've run npm install --save fs already, and then tried it again. But the same error occurs. Permissions for the directory are set as a+rwx and everything has been installing fine up till this point.

This error happens when I add this code to gatsby-node.js as the tutorial says to:

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

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

The full flow of events when I run 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
ℹ ｢wdm｣: Failed to compile.

I googled this error and it pops up in several contexts, none of which match this case with Gatsby. I'm new to React and Gatsby (hence the tutorial), so I don't know how to deal with this yet. How should I fix it?

回答1:

Try to edit file gatsby-node.js (or create it in the source root directory) and add these lines:

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

This will modify your Webpack config and should solve the issue

来源：https://stackoverflow.com/questions/57047839/gatsby-cannot-find-fs-despite-npm-install

标签

node.js

npm

gatsby