Creating a contracts package

BuildContracts.ps1

@@ -0,0 +1,34 @@
+# Taken from psake https://github.com/psake/psake
+
+<#
+.SYNOPSIS
+  This is a helper function that runs a scriptblock and checks the PS variable $lastexitcode
+  to see if an error occcured. If an error is detected then an exception is thrown.
+  This function allows you to run command-line programs without having to
+  explicitly check the $lastexitcode variable.
+.EXAMPLE
+  exec { svn info $repository_trunk } "Error executing SVN. Please verify SVN command-line client is installed"
+#>
+function Exec
+{
+    [CmdletBinding()]
+    param(
+        [Parameter(Position=0,Mandatory=1)][scriptblock]$cmd,
+        [Parameter(Position=1,Mandatory=0)][string]$errorMessage = ($msgs.error_bad_command -f $cmd)
+    )
+    & $cmd
+    if ($lastexitcode -ne 0) {
+        throw ("Exec: " + $errorMessage)
+    }
+}
+
+$artifacts = ".\artifacts"
+$contracts = ".\src\MediatR.Contracts\MediatR.Contracts.csproj"
+
+if(Test-Path $artifacts) { Remove-Item $artifacts -Force -Recurse }
+
+exec { & dotnet clean $contracts -c Release }
+
+exec { & dotnet build $contracts -c Release -p:ContinuousIntegrationBuild=true }
+
+exec { & dotnet pack $contracts -c Release -o $artifacts --no-build }

MediatR.sln

@@ -33,6 +33,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
 		Build.ps1 = Build.ps1
+		BuildContracts.ps1 = BuildContracts.ps1
 		.github\workflows\ci.yml = .github\workflows\ci.yml
 		Directory.Build.props = Directory.Build.props
 		Push.ps1 = Push.ps1
@@ -50,7 +51,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MediatR.Benchmarks", "test\
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MediatR.Examples.Stashbox", "samples\MediatR.Examples.Stashbox\MediatR.Examples.Stashbox.csproj", "{575EC49E-BEC8-4DFF-BD22-8464844093FE}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MediatR.Contracts", "src\MediatR.Contracts\MediatR.Contracts.csproj", "{87F5A238-44B5-4769-82E5-E68B712D6E6D}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MediatR.Contracts", "src\MediatR.Contracts\MediatR.Contracts.csproj", "{87F5A238-44B5-4769-82E5-E68B712D6E6D}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

src/MediatR.Contracts/IStreamRequest.cs

@@ -0,0 +1,7 @@
+namespace MediatR;
+
+/// <summary>
+/// Marker interface to represent a request with a streaming response
+/// </summary>
+/// <typeparam name="TResponse">Response type</typeparam>
+public interface IStreamRequest<out TResponse> { }