From 661d252c5e5f446873b9755ab08a8503c547500b Mon Sep 17 00:00:00 2001
From: NextTurn <45985406+NextTurn@users.noreply.github.com>
Date: Mon, 23 Dec 2019 00:00:00 +0800
Subject: [PATCH] Collect code coverage, Stage 1

---
 .config/dotnet-tools.json | 18 ++++++++
 Directory.Build.targets   | 91 ++++++++++++++++++++++++++++++++++++++-
 azure-pipelines.yml       | 15 +++++--
 3 files changed, 120 insertions(+), 4 deletions(-)
 create mode 100644 .config/dotnet-tools.json

diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
new file mode 100644
index 000000000..efea27171
--- /dev/null
+++ b/.config/dotnet-tools.json
@@ -0,0 +1,18 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "coverlet.console": {
+      "version": "1.6.0",
+      "commands": [
+        "coverlet"
+      ]
+    },
+    "powershell": {
+      "version": "6.2.3",
+      "commands": [
+        "pwsh"
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/Directory.Build.targets b/Directory.Build.targets
index 3b02169fa..4141bd922 100644
--- a/Directory.Build.targets
+++ b/Directory.Build.targets
@@ -1,4 +1,93 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
+
+  <PropertyGroup>
+    <CoverageFormat Condition="'$(CoverageFormat)' == ''">cobertura</CoverageFormat>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <CoverletId />
+  </PropertyGroup>
+
+  <Target Name="BeforeCollectCodeCoverage" BeforeTargets="RunTests">
+    <BeforeCollectCodeCoverageTask TestAssembly="%(TestToRun.Identity)" PipeName="%(TestToRun.Filename)">
+      <Output TaskParameter="CoverletId" PropertyName="CoverletId" />
+    </BeforeCollectCodeCoverageTask>
+  </Target>
+
+  <Target Name="AfterCollectCodeCoverage" AfterTargets="RunTests">
+    <AfterCollectCodeCoverageTask PipeName="%(TestToRun.Filename)" CoverletId="$(CoverletId)" />
+  </Target>
+
+  <UsingTask
+    TaskName="BeforeCollectCodeCoverageTask"
+    TaskFactory="RoslynCodeTaskFactory"
+    AssemblyName="Microsoft.Build.Tasks.Core">
+
+    <ParameterGroup>
+      <TestAssembly ParameterType="System.String" Required="true" />
+      <PipeName ParameterType="System.String" Required="true" />
+      <CoverletId ParameterType="System.Int32" Output="true" />
+    </ParameterGroup>
+
+    <Task>
+      <Using Namespace="System.Diagnostics" />
+      <Using Namespace="System.IO.Pipes" />
+      <Code>
+      Log.LogMessage(MessageImportance.High, PipeName);
+      Log.LogMessage(MessageImportance.High, "1");
+        using var coverlet = Process.Start(
+          @"$(DotNetTool)",
+          $@"tool run coverlet ""{TestAssembly}"" " +
+          @"--format $(CoverageFormat) " +
+          @"--target ""$(DotNetTool)"" " +
+          @"--targetargs ""tool run pwsh " +
+          $"$server = [System.IO.Pipes.NamedPipeServerStream]::new('{PipeName}');" +
+          "$server.WaitForConnection();" +
+          "$server.Disconnect();" +
+          "$server.WaitForConnection();" +
+          "$server.Disconnect();" +
+          @"""");
+        CoverletId = coverlet.Id;
+      Log.LogMessage(MessageImportance.High, "2");
+
+        using var client = new NamedPipeClientStream(PipeName);
+      Log.LogMessage(MessageImportance.High, "3");
+        client.Connect();
+      Log.LogMessage(MessageImportance.High, "4");
+      </Code>
+    </Task>
+
+  </UsingTask>
+
+  <UsingTask
+    TaskName="AfterCollectCodeCoverageTask"
+    TaskFactory="RoslynCodeTaskFactory"
+    AssemblyName="Microsoft.Build.Tasks.Core">
+
+    <ParameterGroup>
+      <PipeName ParameterType="System.String" Required="true" />
+      <CoverletId ParameterType="System.Int32" Required="true" />
+    </ParameterGroup>
+
+    <Task>
+      <Using Namespace="System.Diagnostics" />
+      <Using Namespace="System.IO.Pipes" />
+      <Code>
+      Log.LogMessage(MessageImportance.High, PipeName);
+      Log.LogMessage(MessageImportance.High, "5");
+        using var client = new NamedPipeClientStream(PipeName);
+      Log.LogMessage(MessageImportance.High, "6");
+        client.Connect();
+
+      Log.LogMessage(MessageImportance.High, "7");
+        using var coverlet = Process.GetProcessById(CoverletId);
+        coverlet.WaitForExit();
+      Log.LogMessage(MessageImportance.High, "8");
+      </Code>
+    </Task>
+
+  </UsingTask>
+
   <Import Project="Sdk.targets" Sdk="Microsoft.DotNet.Arcade.Sdk" />
-</Project>
\ No newline at end of file
+</Project>
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 033beedf8..1ef68e700 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -57,11 +57,15 @@ jobs:
       - task: PublishBuildArtifacts@1
         displayName: Publish Packages
         inputs:
-          PathtoPublish: '$(Build.SourcesDirectory)/artifacts/packages/$(_BuildConfig)'
-          PublishLocation: Container
-          ArtifactName: Packages_$(Agent.Os)_$(Agent.JobName)
+          pathtoPublish: '$(Build.SourcesDirectory)/artifacts/packages/$(_BuildConfig)'
+          artifactName: Packages_$(Agent.Os)_$(Agent.JobName)
         continueOnError: true
         condition: always()
+      - task: PublishCodeCoverageResults@1
+        displayName: Publish Code Coverage
+        inputs:
+          codeCoverageTool: cobertura
+          summaryFileLocation: '$(Build.SourcesDirectory)/src/*/coverage.cobertura.xml'
     - job: Linux
       pool:
         name: NetCorePublic-Pool
@@ -79,3 +83,8 @@ jobs:
         name: Build
         displayName: Build
         condition: succeeded()
+      - task: PublishCodeCoverageResults@1
+        displayName: Publish Code Coverage
+        inputs:
+          codeCoverageTool: cobertura
+          summaryFileLocation: '$(Build.SourcesDirectory)/src/*/coverage.cobertura.xml'