Td/abzu 144599 stryker (#272)

* Abzu 144599 - use .NET 8 for Stryker

* Try sdk instead of runtime

* Ignore .NET 6 for the moment

* Show installed dotnet

* Try without code checkout

* SDK version

* Temp update to global json

* Match SDK versions

* More testing

* Suppress checkout

* Try specifying dotnet SDK

* More testing

* Try again

* And again

* Don't overwrite global.json

* Test

* Further test

* Final tidy

azure-pipelines.yml

@@ -52,6 +52,9 @@ stages:
   - stage: Stryker_Mutator
     displayName: "Stryker Mutator"
     dependsOn: []
+    variables:
+    - name: StrykerDotNetVersion
+      value: 8.0.x
     jobs:
     - job: Stryker
       workspace:
@@ -63,21 +66,39 @@ stages:
             packageType: sdk
             useGlobalJson: true
             workingDirectory: '$(Build.SourcesDirectory)'
+
+        - task: UseDotNet@2
+          displayName: 'Use .NET SDK for Stryker'
+          inputs:
+            packageType: sdk
+            version: $(StrykerDotNetVersion)
+
+        - task: PowerShell@1
+          displayName: "Create global.json for .NET"
+          inputs:
+            scriptType: inlineScript
+            workingFolder: $(Agent.TempDirectory)
+            inlineScript: |
+              dotnet new globaljson --sdk-version $(StrykerDotNetVersion)
+
         - task: DotNetCoreCLI@2
           displayName: "Install Stryker"
           inputs:
             command: custom
             custom: tool
+            workingDirectory: $(Agent.TempDirectory)
             arguments: install dotnet-stryker --tool-path $(Agent.BuildDirectory)/tools
+
         - task: Powershell@2
           displayName: "Run Stryker"
           inputs:
             workingDirectory: '$(Build.SourcesDirectory)\UKHO.ExchangeSetService.API'
             targetType: 'inline'
             pwsh: true
             script: $(Agent.BuildDirectory)/tools/dotnet-stryker
+
         - task: PublishMutationReport@0
-          displayName: 'Publish Strkyer Mutator Report'
+          displayName: 'Publish Stryker Mutator Report'
           inputs:
             reportPattern: '**/mutation-report.html'