Resolving Fastlane Gym Archive Error on Xcode 14: Module Not Found Challenge

Discover how to fix the `Fastlane Gym Archive Error` when the module map is not found in Xcode 14. Streamline your React Native builds with this comprehensive guide!
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This video is based on the question https://stackoverflow.com/q/75820170/ asked by the user 'oaowren' ( https://stackoverflow.com/u/21368984/ ) and on the answer https://stackoverflow.com/a/75864528/ provided by the user 'oaowren' ( https://stackoverflow.com/u/21368984/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the Fastlane Gym Archive Error in Xcode 14

Building applications with Fastlane can significantly enhance your mobile development workflow, especially when using React Native. However, developers often encounter issues that can lead to frustrating delays. One such common issue arises when trying to archive your application with Fastlane in Xcode 14, specifically the error: module map file not found. In this guide, we will explore the problem thoroughly and provide a step-by-step guide on how to resolve it effectively.

Understanding the Issue

When running the bundle exec fastlane staging command, users frequently see errors like:

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This indicates that the build process cannot locate certain required module maps, resulting in an unsuccessful archive operation.

Context of the Problem

React Native Version: This issue was identified while working with React Native v0.71.4 after migrating from v0.70.7.

Fastlane Setup: The build failure occurs during the Gym phase of Fastlane where your app is archived.

Step-by-Step Solution

1. Confirm Workspace Usage

The first step towards resolving this issue is ensuring you are using the correct workspace file (.xcworkspace) instead of the project file (.xcodeproj). This is crucial as CocoaPods generates workspace files for projects that use dependencies.

Here’s how you can update your Fastlane Gym configuration:

Open your Fastfile and locate the gym configuration. Modify it to specify the workspace, like so:

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2. Verify Pod Configuration

Ensure your Podfile does not have any conflicting configurations. After renaming your project to use .xcworkspace, review your Podfile to make sure you've set everything appropriately, including the use_frameworks! directive if necessary.

3. Clean Build Environment

Before running the new configuration, it’s important to clean your build environment. Here’s how to do it:

Delete the existing Pods directory and Podfile.lock file.

Run bundle exec pod install to regenerate your pods.

Clean the Derived Data folder in Xcode (Xcode Preferences Locations Derived Data select and delete the folder).

Make sure that your Xcode’s build settings are correctly configured (e.g., ensure the right deployment target is set).

4. Rerun Your Build Process

Now that you have made the necessary changes, it’s time to rerun your Fastlane command:

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5. Additional Errors

If you encounter other issues, such as libraries not found or framework errors, review the building configurations or update your library dependencies accordingly.

Conclusion

Navigating the complexities of Fastlane with React Native can be challenging, but knowing the right steps to take can save you a lot of time and frustration. By making sure to use the .xcworkspace, cleaning up your build environment, and properly configuring your Podfile and Gym configuration, you can circumvent the Fastlane Gym Archive Error you might encounter in Xcode 14.

Remember, the key to a successful build lies in having a clean and well-configured environment. Happy coding!