bpo-41492: Fixes the description appearing in UAC prompts on Windows (GH-21754)

(cherry picked from commit 777b611)

Co-authored-by: Steve Dower <steve.dower@python.org>

Author: miss-islington

.azure-pipelines/windows-release/msi-steps.yml

@@ -1,6 +1,12 @@
 steps:
   - template: ./checkout.yml
 
+  - powershell: |
+      $d = (.\PCbuild\build.bat -V) | %{ if($_ -match '\s+(\w+):\s*(.+)\s*$') { @{$Matches[1] = $Matches[2];} }};
+      Write-Host "##vso[task.setvariable variable=SigningDescription]Python $($d.PythonVersion)"
+    displayName: 'Update signing description'
+    condition: and(succeeded(), not(variables['SigningDescription']))
+
   - task: DownloadPipelineArtifact@1
     displayName: 'Download artifact: doc'
     inputs:

.azure-pipelines/windows-release/stage-pack-msix.yml

@@ -105,9 +105,15 @@ jobs:
     clean: all
 
   steps:
-  - checkout: none
+  - template: ./checkout.yml
   - template: ./find-sdk.yml
 
+  - powershell: |
+      $d = (.\PCbuild\build.bat -V) | %{ if($_ -match '\s+(\w+):\s*(.+)\s*$') { @{$Matches[1] = $Matches[2];} }};
+      Write-Host "##vso[task.setvariable variable=SigningDescription]Python $($d.PythonVersion)"
+    displayName: 'Update signing description'
+    condition: and(succeeded(), not(variables['SigningDescription']))
+
   - task: DownloadBuildArtifacts@0
     displayName: 'Download Artifact: unsigned_msix'
     inputs:

.azure-pipelines/windows-release/stage-sign.yml

@@ -26,6 +26,12 @@ jobs:
   - template: ./checkout.yml
   - template: ./find-sdk.yml
 
+  - powershell: |
+      $d = (.\PCbuild\build.bat -V) | %{ if($_ -match '\s+(\w+):\s*(.+)\s*$') { @{$Matches[1] = $Matches[2];} }};
+      Write-Host "##vso[task.setvariable variable=SigningDescription]Python $($d.PythonVersion)"
+    displayName: 'Update signing description'
+    condition: and(succeeded(), not(variables['SigningDescription']))
+
   - powershell: |
       Write-Host "##vso[build.addbuildtag]signed"
     displayName: 'Add build tags'

Misc/NEWS.d/next/Windows/2020-08-06-16-59-10.bpo-41492.2FQ9cM.rst

@@ -0,0 +1 @@
+Fixes the description that appears in UAC prompts.