Cannot publish ubuntu-x64 standalone app on windows

[moozzyk]

Steps to reproduce

1. Restore packages
2. PS C:\Source\cli-samples\HelloMvc> dotnet publish -r ubuntu-x64

HelloMVC with the following project.json

{
  "buildOptions": {
    "preserveCompilationContext": true,
    "emitEntryPoint": true,
    "debugType": "portable"
  },
  "publishOptions": {
    "include": [
      "wwwroot",
      "Views"
    ]
  },
  "dependencies": {
    "Microsoft.AspNetCore.Diagnostics": "1.0.0-*",
    "Microsoft.AspNetCore.Mvc": "1.0.0-*",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-*",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0-*",
    "Microsoft.Extensions.Logging.Console": "1.0.0-*",
    "Microsoft.NETCore.App": {
      "version": "1.0.0-*"
    }
  },
  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "portable-net45+wp80+win8+wpa81+dnxcore50",
        "portable-net451+win8"
      ]
    }
  },
  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-*",
      "imports": "portable-net45+wp80+win8+wpa81+dnxcore50"
    }
  },
  "scripts": {
    "postpublish": "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%"
  }, 

  "runtimes": { 
    "ubuntu-x64": {}
  }
}

Expected behavior

Publishing succeeds.

Actual behavior

PS C:\Source\cli-samples\HelloMvc> dotnet publish -r ubuntu-x64
Publishing HelloMvc for .NETCoreApp,Version=v1.0/ubuntu-x64
Project HelloMvc (.NETCoreApp,Version=v1.0) will be compiled because expected outputs are missing
Compiling HelloMvc for .NETCoreApp,Version=v1.0

Compilation succeeded.
    0 Warning(s)
    0 Error(s)

Time elapsed 00:00:01.9402395
Failed to make the following project runnable: HelloMvc (.NETCoreApp,Version=v1.0) reason: Expected coreclr library not found in package graph. Please try running dotnet restore again.
Published 0/1 projects successfully

Environment data

dotnet --info output:

PS C:\Source\cli-samples\HelloMvc> dotnet --info
.NET Command Line Tools (1.0.0-rc2-002655)

Product Information:
 Version:     1.0.0-rc2-002655
 Commit Sha:  3e96a05f9c

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.10586
 OS Platform: Windows
 RID:         win10-x64

[brthor]

@moozzyk This error was added so Standalone Apps published without coreclr throw an error prior to host activation.

This means libcoreclr.so is not present in your package graph, probably because ubuntu-x64 is not a rid we publish any runtime packages for (as far as I know).

Try it out with ubuntu.14.04-x64 ?

[TheRealPiotrP]

Please re-open if this still fails with a good RID.

[moozzyk]

How am I supposed to know that I need to use exact RID? My runtime section looks just like this:

  "runtimes": { 
    "ubuntu-x64": {}
  }

so there is no version.

[moozzyk]

If I put ubuntu.14.04-x64 in my project.json and use this as the -r value then I don't get an error. Still the experience sucks - if I use a RID I cannot publish for in my project.json I should get an error/warning (possibly during restore).

[brthor]

How am I supposed to know that I need to use exact RID?

I think this is a documentation issue.

The issue here is that ubuntu-x64 is not necessarily a "wrong" rid and indeed individual packages can create their own custom rid graphs using runtime.json. So at restore time, there's not necessarily a way to say that your rid is wrong.

Even at build/publish time the best we can do for a Standalone app is make sure that whatever package graph exists for the rid you've selected contains coreclr.dll or it's xplat equivalent. If, for example, you had a package which declared that ubuntu-x64 imported ubuntu14.04-x64 (ordering might be backwards) then this should work just fine with ubuntu-x64.

[moozzyk]

That's OK. As long as it is documented it should be fine. The error message could and should be improved though.