Make Linux CI parallel (#9209)

Make the Linux CI build once and then run the tests on 4 different machines, by tag.

## PR Context

Running in parallel allows us to run all tests in about the same amount of clock time

.vsts-ci/linux.yml

@@ -26,77 +26,79 @@ pr:
 variables:
   DOTNET_CLI_TELEMETRY_OPTOUT: 1
   POWERSHELL_TELEMETRY_OPTOUT: 1
-  # Avoid expensive initialization of dotnet cli, see: http://donovanbrown.com/post/Stop-wasting-time-during-NET-Core-builds
+  # Avoid expensive initialization of dotnet cli, see: https://donovanbrown.com/post/Stop-wasting-time-during-NET-Core-builds
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
 
 resources:
 - repo: self
   clean: true
 jobs:
-- job: Linux_CI
+- template: templates/ci-build.yml
+  parameters:
+    pool: Hosted Ubuntu 1604
+    jobName: linux_build
+    displayName: linux Build
 
+- template: templates/nix-test.yml
+  parameters:
+    name: Linux
+    pool: Hosted Ubuntu 1604
+    purpose: UnelevatedPesterTests
+    tagSet: CI
+    parentJobs:
+      - linux_build
+
+- template: templates/nix-test.yml
+  parameters:
+    name: Linux
+    pool: Hosted Ubuntu 1604
+    purpose: ElevatedPesterTests
+    tagSet: CI
+    parentJobs:
+      - linux_build
+
+- template: templates/nix-test.yml
+  parameters:
+    name: Linux
+    pool: Hosted Ubuntu 1604
+    purpose: UnelevatedPesterTests
+    tagSet: Others
+    parentJobs:
+      - linux_build
+
+- template: templates/nix-test.yml
+  parameters:
+    name: Linux
+    pool: Hosted Ubuntu 1604
+    purpose: ElevatedPesterTests
+    tagSet: Others
+    parentJobs:
+      - linux_build
+
+- job: verify_xunit
+  displayName: Verify xUnit Results
   pool:
     name: Hosted Ubuntu 1604
-
-  timeoutInMinutes: 120
-
+  dependsOn:
+    - linux_build
   steps:
-  - powershell: |
-      Get-Process
-    displayName: Capture Processes
-    condition: succeededOrFailed()
+  - task: DownloadBuildArtifacts@0
+    displayName: 'Download build artifacts'
+    inputs:
+      downloadType: specific
+      itemPattern: |
+        xunit/**/*
+      downloadPath: '$(System.ArtifactsDirectory)'
 
-  - powershell: |
-      Get-ChildItem -Path env:
-    displayName: Capture environment
-    condition: succeededOrFailed()
-
-  - powershell: |
-      # sometimes the file is locked and we must wait or things will fail
-      $filePath = '/var/lib/dpkg/lock'
-      $lockList = sudo lsof '/var/lib/dpkg/lock'
-      while($lockList)
-      {
-        Write-Verbose "waiting..." -verbose
-        Write-Verbose ($lockList -join "`n") -verbose
-        Start-Sleep -Second 30
-        $lockList = sudo lsof $filePath
-      }
-      exit 0
-    displayName: Wait for /var/lib/dpkg/lock
-    condition: succeededOrFailed()
-
-  - powershell:  Write-Host "##vso[build.updatebuildnumber]$env:BUILD_SOURCEBRANCHNAME-$env:BUILD_SOURCEVERSION-$((get-date).ToString("yyyyMMddhhmmss"))"
-    displayName: Set Build Name for Non-PR
-    condition: ne(variables['Build.Reason'], 'PullRequest')
-
-# Several scripts require TMPDIR to exist
-# Set it to AGENT_TEMPDIRECTORY so that we know it exists
-  - powershell: |
-      Write-Host "##vso[task.setvariable variable=TEMP]$env:AGENT_TEMPDIRECTORY"
-    displayName: Set TEMP to AGENT_TEMPDIRECTORY
-    condition: succeededOrFailed()
-
-  - template: ../tools/releaseBuild/azureDevOps/templates/insert-nuget-config-azfeed.yml
-
-  - powershell: |
-      Import-Module ./tools/ci.psm1
-      Invoke-BootstrapStage
-    displayName: Bootstrap
-    condition: succeeded()
-
-  - powershell: |
-      Import-Module ./tools/ci.psm1
-      $env:NugetKey = '$(NUGET_KEY)'
-      Invoke-LinuxTests
-    displayName: Build and Test
-    condition: succeeded()
-
-  # Uploads any packages as an artifact
-  - powershell: |
-      Get-ChildItem -Path ${env:BUILD_ARTIFACTSTAGINGDIRECTORY} -Include *.nupkg, *.rpm, *.deb, *.tar.gz, TestPackage.zip -Recurse | Select-Object -ExpandProperty FullName | ForEach-Object {
-        Write-Host "##vso[artifact.upload containerfolder=artifacts;artifactname=artifacts]$_"
-      }
-    displayName: Publish Artifacts
-    condition: succeededOrFailed()
+  - pwsh: |
+      Get-ChildItem "$(System.ArtifactsDirectory)\*" -Recurse
+    displayName: 'Capture artifacts directory'
     continueOnError: true
+
+  - pwsh: |
+      Import-Module .\tools\ci.psm1
+      $xUnitTestResultsFile = "$(System.ArtifactsDirectory)\xunit\xUnitTestResults.xml"
+
+      Test-XUnitTestResults -TestResultsFile $xUnitTestResultsFile
+    displayName: Test
+    condition: succeeded()

.vsts-ci/mac.yml

@@ -30,8 +30,6 @@ variables:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
   # Turn off Homebrew analytics
   HOMEBREW_NO_ANALYTICS: 1
-  # Enable VSTS debug mode until stabilitized
-  system.debug: 'true'
 
 resources:
 - repo: self