New -a and --os are self-contained by default #19706
Description
Was testing these new switches per #18889. They are self-contained by default. That's not what I was expecting.
From the spec:
That means that the following commands would be equivalent:
dotnet build -a x64 --os windotnet build -r win-x64 --no-self-contained
This is what I see:
PS C:\Users\rich\app> dotnet --version
6.0.100-rc.1.21411.12
PS C:\Users\rich\app> ls
Directory: C:\Users\rich\app
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 8/12/2021 1:22 PM 171 app.csproj
-a--- 7/30/2021 4:16 PM 185 Program.cs
PS C:\Users\rich\app> cat .\app.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>
</Project>
PS C:\Users\rich\app> dotnet build -a x64
Microsoft (R) Build Engine version 17.0.0-preview-21411-04+6ca861613 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.
Determining projects to restore...
Restored C:\Users\rich\app\app.csproj (in 2.74 sec).
You are using a preview version of .NET. See: https://aka.ms/dotnet-core-preview
app -> C:\Users\rich\app\bin\Debug\net6.0\win-x64\app.dll
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:05.41
PS C:\Users\rich\app> dir .\bin\Debug\net6.0\win-x64\System*.dll
Directory: C:\Users\rich\app\bin\Debug\net6.0\win-x64
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 8/11/2021 2:28 AM 5120 System.AppContext.dll
-a--- 8/11/2021 2:28 AM 5120 System.Buffers.dll
-a--- 8/11/2021 2:40 AM 236032 System.Collections.Concurrent.dll
-a--- 8/11/2021 2:40 AM 254464 System.Collections.dll
-a--- 8/11/2021 2:40 AM 655360 System.Collections.Immutable.dll
-a--- 8/11/2021 2:40 AM 90624 System.Collections.NonGeneric.dll
...