'singlefilehost' does not specify a 'PublishFolderType' metadata

[ztl8702]

Apple platform

macOS

Framework version

net9.0-*

Affected platform version

.NET 9.0.102

Description

While attempting to publishing a self-contained single executable file, targeting net9.0-macos, the MSBuild publish target fails with:

    /usr/local/share/dotnet/packs/Microsoft.macOS.Sdk.net9.0_15.2/15.2.9173/targets/Xamarin.Shared.Sdk.targets(1903,3): warning : The file '/Users/ztl8702/Documents/ScratchProjects/SignedApp/obj/Release/net9.0-macos/osx-x64/singlefilehost' does not specify a 'PublishFolderType' metadata, and a default value could not be calculated. The file will not be copied to the app bundle.
    /usr/local/share/dotnet/sdk/9.0.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Publish.targets(1116,5): error MSB4018: 
      The "GenerateBundle" task failed unexpectedly.
      System.ArgumentException: Invalid input specification: Must specify the host binary
         at Microsoft.NET.HostModel.Bundle.Bundler.GenerateBundle(IReadOnlyList`1 fileSpecs)
         at Microsoft.NET.Build.Tasks.GenerateBundle.ExecuteCore()
         at Microsoft.NET.Build.Tasks.TaskBase.Execute()
         at Microsoft.Build.BackEnd.TaskExecutionHost.Execute()
         at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(TaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, Ta
      skHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)

Steps to Reproduce

repro.zip

1. Unzip the above ZIP
2. Run dotnet publish -c Release -r osx-x64 -p:PublishSingleFile=true -p:UseAppHost=true

Did you find any workaround?

Not yet.

Build logs

msbuild.binlog.zip

[snechaev]

Your test project is typical macos app with the UI. It can't be built as a single file due to macOS limitations. The macOS application is typically represented by so called application bundle, which is a folder with the .app extension.
So, net-macos will produce such an app bundle on build (no need to call publish at all) and the PublishSingleFile=true just not supported (and even the net sdk will somehow support it, such an app will not run on macOS).

So, just run dotnet build -c release then grab app bundle from the /bin/Relese folder. Additionally, this will produce multi-platform bundle, so it will work both on intel-based and arm-based mac.

[ztl8702]

Thanks for the clarification. Feel free to close this issue.