Content + PublishFolderType ignores some files (.dylib, .dll) during copy

[snechaev]

Apple platform

macOS

Framework version

net10.0-*

Affected platform version

10.0.300 / workloads 26.5.10284

Description

I'm trying to include precompiled helper app bundle HeartBeatHandlerMac.app in the other app bundle using the following csproj settings (the precompiled helper bundle placed at ./helper/HeartBeatHandlerMac.app)

  <ItemGroup>
	<Content Include="helper/**/*">
		<PublishFolderType>RootDirectory</PublishFolderType>
		<Link>Contents/SharedSupport/%(RecursiveDir)%(Filename)%(Extension)</Link>
	</Content>
  </ItemGroup>

Expected: all files from the ./helper/HeartBeatHandlerMac.app/ will be copied in the output app bundle in the Contents/SharedSupport/ subfolder, preserving the original folder structure. For example, for debug config the expected output path will be /bin/Debug/net10.0-macos/osx-arm64/TestMacGuiApp.app/Contents/SharedSupport/HeartBeatHandlerMac.app

Observed: the SharedSupport/HeartBeatHandlerMac.app output folder exists and is not empty, but some files are missing.

Let's compare folder structures (the helper app bundle contents was truncated manually to minimize files count and simplify debug)
For the input folder (./helper):

.
└── HeartBeatHandlerMac.app
    └── Contents
        └── MonoBundle
            ├── .xamarin
            │   ├── osx-arm64
            │   │   ├── HeartBeatHandlerMac.dll
            │   │   ├── Microsoft.CSharp.dll
            │   │   ├── Microsoft.macOS.dll
            │   │   └── Microsoft.VisualBasic.dll
            │   └── osx-x64
            │       ├── HeartBeatHandlerMac.dll
            │       ├── Microsoft.CSharp.dll
            │       ├── Microsoft.macOS.dll
            │       └── Microsoft.VisualBasic.dll
            ├── AsyncIO.dll
            ├── HeartbeatHandlerLib.dll
            ├── libclrgc.dylib
            └── System.ServiceModel.Security.dll

7 directories, 12 files

For the output folder (/bin/Debug/net10.0-macos/osx-arm64/TestMacGuiApp.app/Contents/SharedSupport):

.
└── HeartBeatHandlerMac.app
    └── Contents
        └── MonoBundle
            ├── .xamarin
            │   ├── osx-arm64
            │   │   └── HeartBeatHandlerMac.dll
            │   └── osx-x64
            │       └── HeartBeatHandlerMac.dll
            ├── AsyncIO.dll
            ├── HeartbeatHandlerLib.dll
            └── System.ServiceModel.Security.dll

7 directories, 5 files

In particular, the following files are lost: libclrgc.dylib, Microsoft.macOS.dll.

Steps to Reproduce

1. Download test project Test.zip
2. dotnet build
3. Inspect output folder and compare it with the sources in the helper folder. Observe that some Content files are missing.

Did you find any workaround?

In some cases we can use BundleResource instead of Content (and this copies all the files), but in this particular case, when we need specific location inside the final app bundle, that workaround is not applicable.

Build logs

See inside Test.zip

[snechaev]

Looks like the reason is here (there are a lot of similar messages):

Encountered conflict between 'CopyLocal:/Users/sergey/.nuget/packages/microsoft.netcore.app.runtime.osx-arm64/10.0.8/runtimes/osx-arm64/lib/net10.0/Microsoft.CSharp.dll' and 'CopyLocal:helper/HeartBeatHandlerMac.app/Contents/MonoBundle/.xamarin/osx-arm64/Microsoft.CSharp.dll'. Choosing 'CopyLocal:/Users/sergey/.nuget/packages/microsoft.netcore.app.runtime.osx-arm64/10.0.8/runtimes/osx-arm64/lib/net10.0/Microsoft.CSharp.dll' because it comes from a package that is preferred.

Location: ResolveOverlappingItemGroupConflicts task inside the Target Name=ComputeResolvedFilesToPublishList target.

The message is generated by the following code from the dotnet/sdk, so may be the issue should be moved there:
https://github.com/dotnet/sdk/blob/d8e69cd1695b56da3a02f2d613a0498b63b72553/src/Tasks/Common/ConflictResolution/ConflictResolver.cs#L298-L301

[rolfbjarne]

I can reproduce the problem, and I'm investigating a fix.