Xcode build archive fails

[danthorpe]

• I have read the documentation.

Describe the bug
xcodebuild archive fails in the following scenario.

To Reproduce
Steps to reproduce the behavior:

1. Create a Swift Package, which depends on MetaCodable
2. Create a Target which depends on MetaCodable, HelperCoders and uses the MetaProtocolCodable plugin.
3. Include this target as a product of the package
4. Add types into the target which make use of dynamic data variations, in particular Step 9 from the tutorial: https://swiftpackageindex.com/swiftylab/metacodable/v1.3.0/tutorials/metacodable/dynamic
5. Create an Xcode project for an iOS app which imports the product from the package.
6. Add code-signing for your app
7. Build and Archive from Xcode Product menu (or using xcodebuild archive)

Expected behavior
I should be able to archive the product.

Actual behaviour
Build script fails because build tools cannot find the executable tool ProtocolGen.

Showing All Issues
sandbox-exec: execvp() of '//Users/daniel/Library/Developer/Xcode/DerivedData/Posts-aaxhnzolyyfxrgcsibzfeeijakbj/Build/Intermediates.noindex/ArchiveIntermediates/Posts/BuildProductsPath/Release/ProtocolGen' failed: No such file or directory

Screenshots

Environment (please complete the following information, remove ones not applicable):

• OS: macOS
• Version 14.4.1 (23E224)
• Xcode Version 15.3 (15E204a)
• Swift $ swift -version
  swift-driver version: 1.90.11.1 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4)
  Target: arm64-apple-macosx14.0
• CocoaPods N/A

Additional context
I have created a small project to demonstrate this issue: https://github.com/danthorpe/metacodable_demo

A possible solution, would be to export ProtocolGen as a Swift artefact bundle, and reference this as a binary target in your Package.swift. e.g. how SwiftLint is packaged. In this project, on macOS, the dependency is a binary target instead of the source code executable.

[soumyamahunt]

@danthorpe this seems more like a bug in Xcode as mentioned here.

[913868456]

i got the same warnngs in xcode 15.4, macbook pro M3, swift version 5.10, i search a workaround is

 #if compiler(>= 5.10)
private import XXX
#else
@_implementationOnly import XXX
#endif

so when i can resolve these warnings in future release versions of the MetaCodable?

[soumyamahunt]

What warnings are you getting @913868456?

[soumyamahunt]

Hopefully this issue is fixed in new swift-build

[soumyamahunt]

This has been fixed with Xcode 26.4 so no changes needed from MetaCodable.