Use csc on coreclr

NuGet.Config

@@ -5,6 +5,7 @@
     <clear />
     <add key="AspNetCIDev" value="https://www.myget.org/F/aspnetcidev/api/v3/index.json" />
     <add key="dotnet-core" value="https://www.myget.org/F/dotnet-core/api/v3/index.json" />
+    <add key="roslyn-nightly" value="https://www.myget.org/F/roslyn-nightly/api/v3/index.json" />
     <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
   <activePackageSource>

src/Microsoft.DotNet.Tools.Compiler/Program.cs

@@ -141,7 +141,7 @@ namespace Microsoft.DotNet.Tools.Compiler
             File.WriteAllLines(rsp, cscArgs);
 
             // Execute CSC!
-            var result = Command.Create("csc", $"-noconfig @\"{rsp}\"")
+            var result = RunCsc($"-noconfig @\"{rsp}\"")
                 .ForwardStdErr()
                 .ForwardStdOut()
                 .RunAsync()
@@ -149,6 +149,17 @@ namespace Microsoft.DotNet.Tools.Compiler
             return result.ExitCode == 0;
         }
 
+        private static Command RunCsc(string cscArgs)
+        {
+            // Hack -- if we find csc + corerun in the app directory we should
+            // use that, otherwise just try to find csc on the PATH
+            var corerun = Path.Combine(AppContext.BaseDirectory, "CoreRun.exe");
+            var csc_exe = Path.Combine(AppContext.BaseDirectory, "csc.exe");
+            return File.Exists(corerun) && File.Exists(csc_exe)
+                ? Command.Create(corerun, $@"""{csc_exe}"" {cscArgs}")
+                : Command.Create("csc.exe", cscArgs);
+        }
+
         private static void ApplyCompilationOptions(CompilerOptions compilationOptions, List<string> cscArgs)
         {
             var targetType = compilationOptions.EmitEntryPoint.GetValueOrDefault() ? "exe" : "library";

src/Microsoft.DotNet.Tools.Compiler/project.json

@@ -8,6 +8,7 @@
     },
     "dependencies": {
         "Microsoft.NETCore.ConsoleHost": "1.0.0-*",
+        "Microsoft.NETCore.TestHost": "1.0.0-*",
         "Microsoft.NETCore.Runtime": "1.0.1-*",
 
         "System.Console": "4.0.0-*",
@@ -23,7 +24,8 @@
         "Microsoft.Extensions.CommandLineUtils.Sources": {
             "type": "build",
             "version": "1.0.0-*"
-        }
+        },
+        "Microsoft.Net.Compilers.netcore": "1.1.0-*",
     },
     "frameworks": {
         "dnxcore50": { }

src/Microsoft.Extensions.ProjectModel/Project.cs

@@ -123,7 +123,7 @@ namespace Microsoft.Extensions.ProjectModel
             }
 
             // Assume the directory name is the project name if none was specified
-            var projectName = PathUtility.GetDirectoryName(path);
+            var projectName = PathUtility.GetDirectoryName(Path.GetFullPath(path));
             projectPath = Path.GetFullPath(projectPath);
 
             if (!File.Exists(projectPath))