Bug: Unable to run SwiftUI preview in ./examples/integration project

Description

Apologies with two bug reports, however I think they might be relevant given these are experienced on a clean repo's examples

I am experiencing this SwiftUI preview issue on ./examples/integration —

== PREVIEW UPDATE ERROR:

    FailedToAnalyzeBuiltTargetDescription: Could not analyze the built target description for UI to create the preview.
    
    buildableName: UI
    
    ==================================
    
    |  CouldNotParseLinkCommandLine: Could not parse linker command line.
    |  
    |  Full linker invocation:
    |    /Users/j/git/rules_xcodeproj/examples/integration/Integration.xcodeproj/rules_xcodeproj/bazel/ld
    |    -Xlinker
    |    -reproducible
    |    -target
    |    arm64-apple-ios15.0-simulator
    |    -dynamiclib
    |    -isysroot
    |    /Applications/Xcode-16.0.0.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator18.0.sdk
    |    -O0
    |    -L/Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-iphonesimulator
    |    -F/Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-iphonesimulator
    |    -filelist
    |    /Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/Integration.build/bazel-out/ios_sim_arm64-dbg-ios-sim_arm64-min15.0-applebin_ios-ST-076e152330dd/bin/UI/UIFramework.iOS/Objects-normal/arm64/UIFramework.iOS.LinkFileList
    |    -dead_strip
    |    -Xlinker
    |    -object_path_lto
    |    -Xlinker
    |    /Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/Integration.build/bazel-out/ios_sim_arm64-dbg-ios-sim_arm64-min15.0-applebin_ios-ST-076e152330dd/bin/UI/UIFramework.iOS/Objects-normal/arm64/UIFramework.iOS_lto.o
    |    -Xlinker
    |    -no_deduplicate
    |    -fapplication-extension
    |    -fobjc-link-runtime
    |    -L/Applications/Xcode-16.0.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator
    |    -L/usr/lib/swift
    |    -Xlinker
    |    -add_ast_path
    |    -Xlinker
    |    /Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/Integration.build/bazel-out/ios_sim_arm64-dbg-ios-sim_arm64-min15.0-applebin_ios-ST-076e152330dd/bin/UI/UIFramework.iOS/Objects-normal/arm64/UI.swiftmodule
    |    @/Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/Integration.build/bazel-out/ios_sim_arm64-dbg-ios-sim_arm64-min15.0-applebin_ios-ST-076e152330dd/bin/UI/UIFramework.iOS/DerivedSources/link.params
    |    -Xlinker
    |    -dependency_info
    |    -Xlinker
    |    /Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Intermediates.noindex/Integration.build/bazel-out/ios_sim_arm64-dbg-ios-sim_arm64-min15.0-applebin_ios-ST-076e152330dd/bin/UI/UIFramework.iOS/Objects-normal/arm64/UIFramework.iOS_dependency_info.dat
    |    -o
    |    /Users/j/Library/Developer/Xcode/DerivedData/Integration-bghpkrhtmhauwshjrzrmqeigzklq/Build/Products/Debug-iphonesimulator/bazel-out/ios_sim_arm64-dbg-ios-sim_arm64-min15.0-applebin_ios-ST-076e152330dd/bin/UI/UIFramework.iOS.framework/UIFramework.iOS
    |  
    |  
    |  ==================================
    |  
    |  |  CouldNotParseInput
    |  |  
    |  |  ==================================
    |  |  
    |  |  |  FailedParsingMachObjectFile
    |  |  |  
    |  |  |  MachO data could not be parsed for: arm64-apple-ios15.0-simulator
    |  |  |  Reason: Underlying failure reading data
    |  |  |  Data header bytes: []
    |  |  |  Data header ASCII: "<nil>"
    |  |  |  
    |  |  |  ==================================
    |  |  |  
    |  |  |  |  NSError.NSCocoaErrorDomain.260: The file “arm64-apple-ios15.0-simulator” couldn’t be opened because there is no such file.
    |  |  |  |  
    |  |  |  |  NSCocoaErrorDomain (260):
    |  |  |  |  ==NSURL: arm64-apple-ios15.0-simulator -- file:///
    |  |  |  |  ==NSFilePath: /arm64-apple-ios15.0-simulator
    |  |  |  |  
    |  |  |  |  ==================================
    |  |  |  |  
    |  |  |  |  |  NSError
    |  |  |  |  |  
    |  |  |  |  |  NSError: Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"



== VERSION INFO:

    Tools: 16A242d
    OS:    24F74
    PID:   40272
    Model: MacBook Pro
    Arch:  arm64e



== ENVIRONMENT:

    openFiles = [
        /Users/j/git/rules_xcodeproj/examples/integration/UI/ContentView.swift
    ]
    wantsNewBuildSystem = true
    newBuildSystemAvailable = true
    activeScheme = UIFramework.iOS
    activeRunDestination = iPhone 16 Pro variant iphonesimulator arm64
    workspaceArena = [x]
    buildArena = [x]
    buildableEntries = [
        UIFramework.iOS.framework
    ]
    runMode = JIT Executor



== SELECTED RUN DESTINATION:

    Simulator - iOS 18.0 | iphonesimulator | arm64 | iPhone 16 Pro | no proxy



== EXECUTION MODE OVERRIDES:

    Workspace JIT mode user setting: true
    Falling back to Dynamic Replacement: false



== PACKAGE RESOLUTION ERRORS:

    



== REFERENCED SOURCE PACKAGES:

    



== JIT LINKAGE:

    



== SESSION GROUP 5250:

    workspace identifier: WorkspaceIdentifier(identifier: 5EE78774-A80F-47C2-B844-7B1D58018DA1)
    providers: [
        Preview Provider | ContentView_Previews provider #1 in ContentView.swift [Editor(5187)]
    ]
    translation units: [
        /Users/j/git/rules_xcodeproj/examples/integration/UI/ContentView.swift
    ]
    attributes: [
        Editor(5187):     []
    ]
    session: 5251
    request sessions: [
        ContentView_Previews provider #1 in ContentView.swift: not completed
    ]



== UPDATE SESSION 5251:

    Start Date: Wednesday, June 11, 2025 at 10:57:59 Central European Summer Time
    Preview Provider {
        Simulator {
            platform: none
            device: 49A3EB74-3DD0-4C6E-AE45-A9A97A2FFEDF iPhone 16 Pro
            buildNumber: 23A5260l
            runtimePath: /Library/Developer/CoreSimulator/Volumes/iOS_23A5260l/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 26.0.simruntime
        }
    }
    Build Graph {
        UIFramework.iOS.framework (#3)
           sourceFile(file:///Users/j/git/rules_xcodeproj/examples/integration/UI/ContentView.swift -> ContentView.swift) (#1)
           ContentView.swift (#2)
    }
    Update Plan {
        iOS [arm64 iphonesimulator18.0 iphonesimulator] (iPhone 16 Pro, 717FA606-3B3A-4FD2-917C-66B4709FBD55-iphonesimulator18.0-arm64-iphonesimulator), [], thinning disabled, thunking enabled) {
            Destination: iPhone 16 Pro 717FA606-3B3A-4FD2-917C-66B4709FBD55 | default device for iphonesimulator [
                Framework Agent - Previews {
                    execution point packs [
                        [source: ContentView.swift, role: Previews] (in UI)
                    ]
                    translation units [
                        ContentView.swift (in UIFramework.iOS.framework)
                    ]
                    loadable products [
                        Description(buildableName: "UIFramework.iOS.framework", moduleName: "UI")
                    ]
                    modules [
                        UIFramework.iOS.framework
                    ]
                    jit link description [
                        UIFramework.iOS.framework
                    ]
                }
            ]
        }
    }

Reproduction steps

git clone git@github.com:MobileNativeFoundation/rules_xcodeproj.git
cd examples/integration
xcodes select 16.0
bazelisk run //:xcodeproj-incremental-bazel-sim_arm64
xed .

• Select UIFramework as a build target
• Run SwiftUI preview in ./UI/ContentView.swift

Expected behavior

SwiftUI preview to run

rules_xcodeproj version

main

Xcode version

16.0 via xcodes

Bazel version

8.2.1 via bazelisk

rules_apple version

No response

rules_swift version

No response

Additional information

No response

Reproduce from examples/integration with xcodes select 16.0 and bazelisk run //:xcodeproj-incremental-bazel-sim_arm64, then open the generated project and inspect the linker invocation shown for the UI target. The issue is done when the SwiftUI preview in UI/ContentView.swift runs successfully for the UIFramework target.