Getting "Execution failed for task ':app:invokeLibraryCodegen'" when running yarn android inside Fabric View Library

[hamdoudhakem]

Description

I started a new Blank Library using the Fabric View template, after I ran yarn install in the project root and inside the example folder without changing or doing anything else I ran yarn android and I keep getting this error:

I also tried the Fabric View with backward compatibility template and I got the same error.
I also followed these docs to check if anything was wrong with the template and I didn't find anything: https://github.com/reactwg/react-native-new-architecture/blob/main/docs/fabric-native-components.md

Packages

• create-react-native-library
• react-native-builder-bob

Selected options

Fabric View

Link to repro

https://github.com/hamdoudhakem/react-native-chat-llm

Environment

• System:
  • OS: Windows 11 10.0.22631
  • CPU: (12) x64 Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
  • Memory: 1.73 GB / 15.78 GB
• Binaries:
  • Node:
    • version: 20.18.0
    • path: C:\Program Files\nodejs\node.EXE
  • Yarn:
    • version: 3.6.1
    • path: ~\AppData\Roaming\npm\yarn.CMD
  • npm:
    • version: 10.9.0
    • path: C:\Program Files\nodejs\npm.CMD
  • Watchman: Not Found
• SDKs:
  • Android SDK: Not Found
  • Windows SDK: Not Found
• IDEs:
  • Android Studio: AI-242.21829.142.2421.12409432
  • Visual Studio:
  • 17.11.35327.3 (Visual Studio Community 2022)
• Languages:
  • Java: 17.0.13
  • Ruby: Not Found
• npmPackages:
  • "@react-native-community/cli":
    • installed: 15.0.1
    • wanted: 15.0.1
  • react:
    • installed: 18.3.1
    • wanted: 18.3.1
  • react-native:
    • installed: 0.76.3
    • wanted: 0.76.3
  • react-native-windows: Not Found
• npmGlobalPackages:
  • "react-native": Not Found
• Android:
  • hermesEnabled: true
  • newArchEnabled: true
• iOS:
  • hermesEnabled: Not found
  • newArchEnabled: Not found

[antoine1anthony]

Hey, just a thought have you tried downgrading your node version from 20 to 18.

[tri-bao]

I got the same problem with a new Turbo library. I use node 20, the same thing with node 18. In my case, I turned out gradle, somehow, couldn't resolve npx although Nodjs bin folder is in the PATH. You may try to use the absolute path to npx in file

example/android/app/build.gradle At the end of the file,

if (isNewArchitectureEnabled()) {
    // Since our library doesn't invoke codegen automatically we need to do it here.
    tasks.register('invokeLibraryCodegen', Exec) {
        workingDir "$rootDir/../../"

        // I use this command to confirm that node/bin is in the PATH
        commandLine 'env'

        commandLine "npx", "bob", "build", "--target", "codegen"
    }
    preBuild.dependsOn invokeLibraryCodegen
}

I changed it to the absolute path, it worked.

Then, I restarted my PC, turn back to just npx, and ... it also worked!