main.jsbundle not found for ios

[Sachanski]

Environment

System:
OS: macOS 10.15.5
CPU: (4) x64 Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz
Memory: 239.48 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 12.18.2 - ~/.nvm/versions/node/v12.18.2/bin/node
Yarn: 1.10.1 - /usr/local/bin/yarn
npm: 6.14.5 - ~/.nvm/versions/node/v12.18.2/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.9.3 - /Users/ivo/.rbenv/shims/pod
SDKs:
iOS SDK:
Platforms: iOS 13.5, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
Android SDK:
API Levels: 24, 27, 28, 29
Build Tools: 28.0.3, 29.0.2
Android NDK: 20.0.5594570
IDEs:
Android Studio: 3.4 AI-183.6156.11.34.5692245
Xcode: 11.5/11E608c - /usr/bin/xcodebuild
Languages:
Java: 1.8.0_131 - /usr/bin/javac
Python: 2.7.16 - /usr/bin/python
npmPackages:
@react-native-community/cli: Not Found
react: 16.13.1 => 16.13.1
react-native: 0.63.0 => 0.63.0
npmGlobalPackages:
react-native: Not Found

Upgrading version

0.63

Problem

Running xcode build result in main.jsbundle not found

Solution

I had imports like this:

import Component from '..'

replacing these imports with relative paths seems to have resolved the issue.
Here is my SO answer to a question regarding main.jsbundle for 0.63

[EmpireJones]

This seems to be related to usage of babel-plugin-module-resolver in my case. Were you using that too?

I haven't figured out a workaround yet. Removing usage of that plugin isn't really a great solution.

[Sachanski]

@EmpireJones I can confirm that I am also using babel-plugin-module-resolver (^3.2.0).

Is the issue surfacing with some .. imports or similar?

[lorenzoangelini]

@EmpireJones I have the same problem after upgrading to 0.63

[umang-simform]

I am also facing same issue.

[lorenzoangelini]

in my case path like this: import { SplashScreen } from 'src/splashScreen/screen'.
They are searched inside the node_module, and obviously they are not found. In the previous version of react native i don't have this problem

[Sachanski]

If that helps anyone - I have the following section in my .babelrc:

{
  ...,
  "plugins": [
    ...,
    ["module-resolver", {
      "root": "./",
      "alias": {
        "src": "./src",
        "@components": "...",
      }
    }]
  ]
}

and the same for every direct child of the src folder

[umang-simform]

I am getting this error in particular:

Showing Recent Errors Only
error index.js: Import statement may only appear at top level in file index.js at 4:2. Run CLI with --verbose flag for more details.

Error: Import statement may only appear at top level in file index.js at 4:2

[EmpireJones]

@Sachanski In my project I'm just using the plugin to set the root; I'm not using aliases or ".." in these imports. Usage is similar to @lorenzoangelini's #87 (comment)

[EmpireJones]

Likely implied from the title, but I believe this is only occurring for me on iOS builds. Android builds seem to complete successfully.

[Theofilos-Chamalis]

I am greeted with the same "main.jsbundle not found" error, however this happens only when I am trying to run the application on a physical iPhone device. On the Simulator it is running with no issues

[zzorba]

Seeing the same issue -- have tried a few alternate configs for the module-resolver with no luck, no change when upgrading to 0.63.1 either.

Only seems to happen when generating the bundle, the simulator/debug mode works just fine.

[zzorba]

Found this thread on the main react-native project where people are discussing the same issue, and have several proposed solutions: facebook/react-native#29351