Error: Cannot find module 'fs-extra'

[jonahsnider]

fs-extra is used by next-pwa but not actually in the dependencies. This makes the library totally unusable for anyone using

• A package manager that uses PnP
• Yarn 2
• Anyone who isn't coincidentally installing a package that properly depends on fs-extra

$ next build

> Build error occurred
Error: Cannot find module 'fs-extra'
Require stack:
- /usr/src/project/node_modules/next-pwa/index.js
- /usr/src/project/next.config.js
- /usr/src/project/node_modules/next/dist/next-server/server/config.js
- /usr/src/project/node_modules/next/dist/build/index.js
- /usr/src/project/node_modules/next/dist/cli/next-build.js
- /usr/src/project/node_modules/next/dist/bin/next
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)
    at Function.Module._load (internal/modules/cjs/loader.js:842:27)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/usr/src/project/node_modules/next-pwa/index.js:4:12)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.Module._load (internal/modules/cjs/loader.js:879:14)
    at Module.require (internal/modules/cjs/loader.js:1026:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/usr/src/project/node_modules/next-pwa/index.js',
    '/usr/src/project/next.config.js',
    '/usr/src/project/node_modules/next/dist/next-server/server/config.js',
    '/usr/src/project/node_modules/next/dist/build/index.js',
    '/usr/src/project/node_modules/next/dist/cli/next-build.js',
    '/usr/src/project/node_modules/next/dist/bin/next'
  ]
}

[jonahsnider]

Looking at the source code, the fs-extra package is only used once for something that's in the base fs module.

next-pwa/index.js

Line 99 in b225d98

if (fs.existsSync(customWorkerEntry)) {