RN - Error: jest-haste-map: @providesModule naming collision

[jaimecbernardo]

Reporting this error here as well, as suggested in the corresponding react-native issue: https://github.com/facebook/react-native/issues/21242#issuecomment-424132088

It's related to react-native's usage of metro, where a plugin might need to instruct metro to ignore some paths in the react-native project. Discussion here might helpful, as there might already be a way to achieve this.

Here's the original issue:

Environment

  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      Memory: 1.69 GB / 8.00 GB
      Shell: 4.4.12 - /usr/local/bin/bash
    Binaries:
      Node: 8.9.2 - /usr/local/bin/node
      npm: 5.5.1 - /usr/local/bin/npm
      Watchman: 4.7.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3
      Android SDK:
        Build Tools: 23.0.1, 25.0.0, 25.0.3, 26.0.1, 26.0.2, 26.0.3, 27.0.1, 27.0.3, 28.0.0, 28.0.1
        API Levels: 23, 24, 25, 26, 27
    IDEs:
      Android Studio: 3.0 AI-171.4443003
      Xcode: 9.4.1/9F2000 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.5.0 => 16.5.0 
      react-native: 0.57.0 => 0.57.0 
    npmGlobalPackages:
      react-native-cli: 2.0.1
      react-native-git-upgrade: 0.2.7

Description

The nodejs-mobile-react-native plugin runs a nodejs project in a react-native application. It creates a nodejs-project folder in the react-native's project root folder, which will be copied in the build process to be included in the mobile application assets, which means the Bundler will detect duplicate modules.

Before react-native version 0.56, this duplication caused a warning while the bundler was starting, but the mobile application was still able to function and get the react-native files from the bundler. In and after version 0.56, the bundler will now throw an error when the mobile application tries to get the bundle from the development machine: error: bundling failed: Error: jest-haste-map: @providesModule naming collision:

Before react-native version 0.56, it was possible to use the plugin without creating a rn-cli.config.js file in the react-native project, as this was only a warning, but now creating a rn-cli.config.js file in the main project with a blacklist for the Metro bundler is mandatory for using the plugin: https://github.com/janeasystems/nodejs-mobile-react-native/tree/ed727edea17e8a9e1a85cef3413becc83b8a0328#duplicate-module-name

Since this is now an error that won't allow the application to work, is there something that can be done from inside the plugin to have the Metro bundler ignore some paths?

Thank you, in advance.

Reproducible Demo

Before react-native version 0.56, the application is able to run successfully.

react-native init DuplicateModulesWarning --version 0.55.4
cd DuplicateModulesWarning
npm install nodejs-mobile-react-native
mv nodejs-assets/nodejs-project/sample-package.json nodejs-assets/nodejs-project/package.json
mv nodejs-assets/nodejs-project/sample-main.js nodejs-assets/nodejs-project/main.js
react-native link
react-native run-android

The react packager throws warnings but the application can still run and get the bundle from the development machine:

Loading dependency graph, done.
jest-haste-map: @providesModule naming collision:
  Duplicate module name: sample-node-project

In and after react-native version 0.56, the application will fail to run due to the bundler failing:

react-native init DuplicateModulesError --version 0.56.0
cd DuplicateModulesError
npm install nodejs-mobile-react-native
mv nodejs-assets/nodejs-project/sample-package.json nodejs-assets/nodejs-project/package.json
mv nodejs-assets/nodejs-project/sample-main.js nodejs-assets/nodejs-project/main.js
react-native link
react-native run-android

The same warning is still thrown but now there is an additional error when the application running in the device tries to get the bundle from the development machine:

error: bundling failed: Error: jest-haste-map: @providesModule naming collision:
  Duplicate module name: sample-node-project
  Paths: /Users/username/temp-projects/DuplicateModulesError/nodejs-assets/nodejs-project/package.json collides with /Users/username/temp-projects/DuplicateModulesError/android/build/nodejs-assets/nodejs-project/package.json

This error is caused by a @providesModule declaration with the same name across two different files.
    at setModule (/Users/username/temp-projects/DuplicateModulesError/node_modules/jest-haste-map/build/index.js:446:17)
    at workerReply (/Users/username/temp-projects/DuplicateModulesError/node_modules/jest-haste-map/build/index.js:496:9)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7)
 BUNDLE  [android, dev] ../../index.js ░░░░░░░░░░░░░░░░ 0.0% (0/1), failed.

Sometimes this error won't occur in the first run, so there's probably a timing issue here. If it doesn't occur in the first run, close the Metro Bundler and run react-native run-android again.

[rafeca]

Hi! Thanks for reporting!

The metro resolution logic (which is powered by jest-haste-map) treats any folder with a package.json as a global module, so in this case it's mandatory to have a blacklistRE option param to tell Metro to ignore that folder.

This should be done in the default Metro config for RN apps (which lives here), IMHO it should be fine to always add the build folders in the blacklist of Metro, since nothing should be resolved from there.

[jaimecbernardo]

Hi! Thank you for the answer. That's the current workaround, which is to instruct the user to create the configuration file: https://github.com/janeasystems/nodejs-mobile-react-native/tree/ed727edea17e8a9e1a85cef3413becc83b8a0328#duplicate-module-name

Is there a way this could be done from inside the plugin code?

[rafeca]

Unfortunately there's no way for plugins to modify the config object, what you can do is implement some util method in nodejs-mobile-react that can be used by users to automatically update the config adding the correct blacklist

[jose2007kj]

i have added rn-cli.config.js file to my react native project root...... with he contents mentioned here but still i am getting he same error like

sir @jaimecbernardo @rafeca ,where i might be going wrong react-native version 0.57.0

[jose2007kj]

solved it by changing the conflict making libraries to old version

[jamalx31]

solved by adding rn-cli.config.js

const blacklist = require('metro-config/src/defaults/blacklist');

module.exports = {
    resolver: {
        blacklistRE: blacklist([
            /node_modules\/.*\/node_modules\/react-native\/.*/,
        ])
    },
};

[borgogelli]

Why Metro doesn't honor the following config in the package.json ?

  "jest": {
    "preset": "jest-expo",
    "modulePathIgnorePatterns": [
        ".yarn", ".npm"
    ]
  },

(see the modulePathIgnorePatterns option)

[nvmanh]

@jaimecbernardo confirmed your solution works by adding:

const blacklist = require('metro-config/src/defaults/blacklist');
module.exports = {
  resolver:{
    blacklistRE: blacklist([
      /nodejs-assets\/.*/,
      /android\/.*/,
      /ios\/.*/
    ])
  },
};

[RavichandraBadeka]

Can anyone tell me where to use this below code

const blacklist = require('metro-config/src/defaults/blacklist'); module.exports = { resolver:{ blacklistRE: blacklist([ /nodejs-assets/./, /android/./, /ios/.*/ ]) }, };

[antgel]

@RavichandraBadeka Please format your code with Markdown.

[antgel]

Workaround not working for me when trying to refactor part of an Expo app into a common module. Issue at https://github.com/expo/expo/issues/3713 if anyone has any clues if it's my error or a deeper bug.

[thg303]

@RavichandraBadeka simply put the code in a file, name it rn-cli.config.js and put it in your project's root directory (next to package.json). that's all

[shreyasb07]

@jamalx31 & @thg303, I added the rn-cli.config.js file in the root directory of my project, restarted the terminal and XCode, but I still get the same error on Metro.

Could there possibly be something that I am missing here?

[thg303]

@shreyasb07 I see you have metro.config.js there too. I think in newer versions metro uses that instead of rn-cli.config.js, so try putting content there too. if that worked, you can remove rn-cli.config.js.

[nvest3]

@shreyasb07 I see you have metro.config.js there too. I think in newer versions metro uses that instead of rn-cli.config.js, so try putting content there too. if that worked, you can remove rn-cli.config.js.

@thg303 thanks a lot. you saved my day

[shreyasb07]

@thg303 thank you so much, that works! I really appreciate it!

[jaimecbernardo]

Thank you @thg303 . The files that are looked for seem to be defined here : https://github.com/facebook/metro/blob/0393cdf58853d47717346cabacdd3d7be41b2193/packages/metro-config/src/loadConfig.js#L65-L68

[Kamalnrf]

I'm getting this error after adding blacklist.

Error: Unable to resolve module `./index`

[tbarbugli]

I get this error by following the official tutorial from Facebook React Native

[Sharcoux]

Ok, I got the solution after 3 days of trials with everything I could find on the internet.

Add this in your podfile:

  pod 'React', :path => '../node_modules/react-native'
  pod 'yoga', :path => '../node_modules/react-native/ReactCommon/yoga'

Then in your ios folder, do:

rm -Rf Pods && pod install

That last line might seem obvious for most of you but it was not for me as I usually let react-native handle everything that happens at ios or android level. The problem should now be solved.

[mymai91]

I have same error. I tried remove node module many time but didn't solve problem.

And then I open 1 tab run npm start -- --reset-cache => this tab should be run first. (1 more thing quite weird I ran with yarn start -- --reset-cache BUT yarn not help to solve this problem)

open another tab run react-native run-ios

[ShashankMalviya1994]

Only this works for me, I don't know how many other issues i am going to face for this. `const blacklist = require('metro-config/src/defaults/blacklist');

module.exports = { resolver:{ blacklistRE: blacklist([ /node_modules\/.*\/node_modules\/react-native\/.*/, ]) }, };`

[n-k-d]

not working for me anything.. :(

[lupelius]

This is my metro.config.js (I know I don't need both resolver and transformer.getBlacklistRE before you say it, I wanted to show I tried a couple things) and I also tried mymai91's suggestion to reset cache on one tab and run ios on a second one, nothing is working... I've been on this stuck for two days, every time you install a new package and link, react native stops working, it's so frustrating

`/**

• Metro configuration for React Native
• https://github.com/facebook/react-native
• @format / / eslint-disable import/prefer-default-export */ const blacklist = require('metro-config/src/defaults/blacklist');

module.exports = { resolver:{ blacklistRE: blacklist([ /node_modules/./node_modules/react-native/./, ]) }, transformer: { getBlacklistRE: () => { blacklist([ /node_modules/./node_modules/react-native/./, /nodejs-assets/./, /android/./, /ios/./, /node_modules\.\node_modules\react-native\./, /nodejs-assets\./, /android\./, /ios\./ ]) }, getTransformOptions: async () => ({ transform: { experimentalImportSupport: false, inlineRequires: false, }, }), }, };`

[lupelius]

OK About to board a plane so can't find out which bit worked but following metro config works finally, wanted to share:

`/**

• Metro configuration for React Native
• https://github.com/facebook/react-native
• @format / / eslint-disable import/prefer-default-export */ const blacklist = require('metro-config/src/defaults/blacklist');

module.exports = { resolver:{ blacklistRE: blacklist([ /react-native/local-cli/core/fixtures./, /node_modules/./node_modules/react-native/./, /nodejs-assets/./, /android/./, /ios/./, /node_modules\.\node_modules\react-native\./, /nodejs-assets\./, /android\./, /ios\./ ]) }, getBlacklistRE () { return blacklist([ /react-native/local-cli/core/fixtures./, /node_modules/./node_modules/react-native/./, /nodejs-assets/./, /android/./, /ios/./, /node_modules\.\node_modules\react-native\./, /nodejs-assets\./, /android\./, /ios\./ ]) }, transformer: { getBlacklistRE () { blacklist([ /node_modules/./node_modules/react-native/./, /nodejs-assets/./, /android/./, /ios/./, /node_modules\.\node_modules\react-native\./, /nodejs-assets\./, /android\./, /ios\./ ]) }, getTransformOptions: async () => ({ transform: { experimentalImportSupport: false, inlineRequires: false, }, }), }, };`

[BarglanceDev]

@lupelius Awesome! What worked for you? Im on this now

[watchtower314]

not working for me anything.. :(

did you manage to find a fix?

[kurt-abela]

I'm getting this error after adding blacklist.

Error: Unable to resolve module `./index`

Exactly same error, did you manage to fix it..?

[akhilvc10]

I'm getting this error after adding blacklist.

Error: Unable to resolve module `./index`

Same error. did you fix it ?

[SotaTek-HieuDuong]

@shreyasb07 I see you have metro.config.js there too. I think in newer versions metro uses that instead of rn-cli.config.js, so try putting content there too. if that worked, you can remove rn-cli.config.js.

you saved my day 💯