error: bundling failed: Error: Cannot find module 'warnOnce'

[amunim]

🐛 Bug Report

Cannot launch the app

To Reproduce

make a new app from here and follow the exact steps and after adding flow-bin the error will occur.

Expected Behavior

App to work properly.

Code Example

Nothing changed nor added only followed from the link above to use ESLint and Flow

Environment

info
React Native Environment Info:
System:
OS: Windows 10
CPU: (4) x64 Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
Memory: 2.28 GB / 7.88 GB
Binaries:
Yarn: 1.15.2 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 6.4.1 - C:\Program Files\nodejs\npm.CMD
IDEs:
Android Studio: Version 3.2.0.0 AI-181.5540.7.32.5056338

And I used Yarn(if that matters)

[amunim]

Hey!
I have fixed the error here are the steps I did(there can be improvements):

1. As of now, flow's bin version is 0.97.0 and react-native produces ^0.92.0 so in the .flowconfig I changed it to ^0.97.0
2. Now In the root of you're project create a file flowLibs.js(or anything really).
3. In the .flowconfig under [libs] paste ./flowLibs.js and paste
   <PROJECT_ROOT>/node_modules/.* <PROJECT_ROOT>/flowLibs.js
   under [ignore] tag.
4. Now in the flowLibs.js file you just created above paste
   declare module "react-native" { declare module.exports: any; }
   or if you have problem with another module then replace react-native with you're module.

this also fixes the error cannot resolve module 'react-native'

NOTE: you do not need to install flow-bin

1. the reason is that flow-type is included with react-native
2. If you have installed flow-language support extension on vs code then latest version of flow-bin client is already present i.e. As of now 0.97.0