[CI] Allow to skip all tests in the parallel implementation. (#15334)

Co-authored-by: Rolf Bjarne Kvinge <rolf@xamarin.com>

tools/devops/automation/templates/common/configure.yml

@@ -96,7 +96,8 @@ steps:
         "trigger-device-tests",
         "run-sample-tests",
         "skip-packaged-xamarin-mac-tests",
-        "skip-api-comparison"
+        "skip-api-comparison",
+        "skip-all-tests"
       )
 
       foreach ($l in $labelsOfInterest) {

tools/devops/automation/templates/tests/stage.yml

@@ -103,6 +103,8 @@ stages:
 
   - ${{ each label in parameters.simTestsConfigurations }}:
     - job: "tests_${{ replace(label, '-', '_') }}"
+      ${{ if eq(parameters.parseLabels, true) }}:
+        condition: eq(dependencies.configure.outputs['labels.skip-all-tests'], '')
       dependsOn:
       - ${{ if eq(parameters.parseLabels, true) }}:
         - configure
@@ -144,13 +146,18 @@ stages:
           gitHubToken: ${{ parameters.gitHubToken }}
           xqaCertPass: ${{ parameters.xqaCertPass }}
 
-  - job: publish_html
-    displayName: 'Publish Html report in VSDrops'
+  - job: publish_test_results
+    ${{ if eq(parameters.parseLabels, true) }}:
+      condition: and(eq(dependencies.configure.outputs['labels.skip-all-tests'], ''),  succeededOrFailed())
+    ${{ else }}:
+      condition: succeededOrFailed()
+    displayName: 'GitHub comment - Publish results'
     timeoutInMinutes: 1000
     dependsOn: # has to wait for the tests to be done AND the data to be uploaded
+    - ${{ if eq(parameters.parseLabels, true) }}:
+      - configure
     - ${{ each label in parameters.simTestsConfigurations }}:
       - tests_${{ replace(label, '-', '_') }}
-    condition: succeededOrFailed()
     variables:
       ${{ each label in parameters.simTestsConfigurations }}:
         # Define the variable FOO from the previous job
@@ -169,3 +176,33 @@ stages:
         statusContext: ${{ parameters.statusContext }}
         vsdropsPrefix: ${{ parameters.vsdropsPrefix }}
         testPrefix: ${{ parameters.testPrefix }}
+
+  - job: publish_skipped_tests
+    ${{ if eq(parameters.parseLabels, true) }}:
+      condition: ne(dependencies.configure.outputs['labels.skip-all-tests'], '')
+    ${{ else }}:
+      condition: false
+    displayName: 'GitHub comment - Skipped tests'
+    timeoutInMinutes: 1000
+    dependsOn: # has to wait for the tests to be done AND the data to be uploaded
+    -  configure
+
+    pool:
+      vmImage: 'windows-latest'
+      workspace:
+        clean: all
+
+    steps:
+    - pwsh: |
+        Import-Module $Env:SYSTEM_DEFAULTWORKINGDIRECTORY\xamarin-macios\tools\devops\automation\scripts\MaciosCI.psd1
+
+        $gihubComments = New-GitHubCommentsObject -Org "xamarin" -Repo "xamarin-macios" -Token $Env:GITHUB_TOKEN -Hash $Env:GIT_HASH -Debug
+        $sb = [System.Text.StringBuilder]::new()
+        $sb.AppendLine("All tests have been skipped because the label 'skip-all-tests' was set.")
+        $result = $gihubComments.NewCommentFromMessage("Test results", ":seedling:", $sb.ToString())
+      displayName: 'Set comment'
+      env:
+        CONTEXT: ${{ parameters.statusContext }}
+        DEVICE_PREFIX: ${{ parameters.testPrefix }}
+        GITHUB_TOKEN: $(GitHub.Token)
+        ACCESSTOKEN: $(System.AccessToken)