dotnet build does not publish native dependencies for net451 on Mac and Linux

Steps to reproduce

Run build.sh from https://github.com/aspnet/KestrelHttpServer on Mac and/or linux.

You can also reproduce by running KestrelHttpServer/samples/SampleApp using dotnet run -f net451.

Expected behavior

All the tests should pass. The sample app should run successfully.

Actual behavior

You will see the Microsoft.AspNetCore.Server.Kestrel.FunctionalTests project fail on net451/mono due to test/Microsoft.AspNetCore.Server.Kestrel.FunctionalTests/System.DllNotFoundException : libuv. This is caused by a lack of libuv.so in bin/Debug/net451/[rid]/.

The Kestrel SampleApp exits immediately with

System.AggregateException: One or more errors occurred. ---> System.DllNotFoundException: libuv
  at (wrapper managed-to-native) Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv/NativeMethods:uv_loop_size ()
  at Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv.loop_size () [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.Networking.UvLoopHandle.Init (Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv uv) [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelThread.ThreadStart (System.Object parameter) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Threading.Tasks.Task.ThrowIfExceptional (Boolean includeTaskCanceledExceptions) [0x00000] in <filename unknown>:0
  at System.Threading.Tasks.Task.Wait (Int32 millisecondsTimeout, CancellationToken cancellationToken) [0x00000] in <filename unknown>:0
  at System.Threading.Tasks.Task.Wait () [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelEngine.Start (Int32 count) [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelServer.Start[Context] (IHttpApplication`1 application) [0x00000] in <filename unknown>:0
---> (Inner Exception #0) System.DllNotFoundException: libuv
  at (wrapper managed-to-native) Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv/NativeMethods:uv_loop_size ()
  at Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv.loop_size () [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.Networking.UvLoopHandle.Init (Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv uv) [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelThread.ThreadStart (System.Object parameter) [0x00000] in <filename unknown>:0 <---
dbug: Microsoft.AspNetCore.Hosting.Internal.WebHost[5]
      Hosting shutdown
[ERROR] FATAL UNHANDLED EXCEPTION: System.AggregateException: One or more errors occurred. ---> System.DllNotFoundException: libuv
  at (wrapper managed-to-native) Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv/NativeMethods:uv_loop_size ()
  at Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv.loop_size () [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.Networking.UvLoopHandle.Init (Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv uv) [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelThread.ThreadStart (System.Object parameter) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Threading.Tasks.Task.ThrowIfExceptional (Boolean includeTaskCanceledExceptions) [0x00000] in <filename unknown>:0
  at System.Threading.Tasks.Task.Wait (Int32 millisecondsTimeout, CancellationToken cancellationToken) [0x00000] in <filename unknown>:0
  at System.Threading.Tasks.Task.Wait () [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelEngine.Start (Int32 count) [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelServer.Start[Context] (IHttpApplication`1 application) [0x00000] in <filename unknown>:0
---> (Inner Exception #0) System.DllNotFoundException: libuv
  at (wrapper managed-to-native) Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv/NativeMethods:uv_loop_size ()
  at Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv.loop_size () [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.Networking.UvLoopHandle.Init (Microsoft.AspNetCore.Server.Kestrel.Networking.Libuv uv) [0x00000] in <filename unknown>:0
  at Microsoft.AspNetCore.Server.Kestrel.KestrelThread.ThreadStart (System.Object parameter) [0x00000] in <filename unknown>:0 <---

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-rc2-002416)

Product Information:
 Version:     1.0.0-rc2-002416
 Commit Sha:  37f00f24e9

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  14.04
 OS Platform: Linux
 RID:         ubuntu.14.04-x64

@davidfowl @pakrym

[simsod]

@piotrpMSFT: is this for real? How has this not been communicated clearly to the community? Dropping support for net451 on osx/mono is a HUGE deal for many of us. Is there a workaround or something using imports?

[TheRealPiotrP]

net45* projects are not supported on non-Windows OS’s for 1.0.0.

@richlander FYI