Add GitHub action for PR creation and Wix file generation logic (#12748)

.github/workflows/daily.yml

@@ -0,0 +1,54 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT license.
+
+name: PowerShell Daily
+on:
+    schedule:
+    # At 13:00 UTC every day.
+    - cron:  '0 13 * * *'
+
+defaults:
+  run:
+    shell: pwsh
+
+env:
+  DOTNET_CLI_TELEMETRY_OPTOUT: 1
+  POWERSHELL_TELEMETRY_OPTOUT: 1
+
+jobs:
+  update-dotnet-preview:
+    name: Update .NET preview
+    timeout-minutes: 15
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Sync tags
+        run: |
+          git fetch --prune --unshallow --tags
+      - name: Execute Update .NET script
+        run: |
+          $currentVersion = (Get-Content .\global.json | ConvertFrom-Json).sdk.version
+          Write-Verbose "name=OLD_VERSION::$currentVersion" -Verbose
+          Write-Host "::set-env name=OLD_VERSION::$currentVersion"
+
+          ./tools/UpdateDotnetRuntime.ps1 -UpdateMSIPackaging
+          $newVersion = (Get-Content .\global.json | ConvertFrom-Json).sdk.version
+          Write-Verbose "name=NEW_VERSION::$newVersion" -Verbose
+          Write-Host "::set-env name=NEW_VERSION::$newVersion"
+
+          if ($currentVersion -ne $newVersion) {
+            Write-Verbose "name=CREATE_PR::true" -Verbose
+            Write-Host "::set-env name=CREATE_PR::true"
+          }
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v2
+        id: cpr
+        if: env.CREATE_PR == 'true'
+        with:
+          commit-message: "Update .NET SDK version from `${{ env.OLD_VERSION }}` to `${{ env.NEW_VERSION }}`"
+          title: "Update .NET SDK version from `${{ env.OLD_VERSION }}` to `${{ env.NEW_VERSION }}`"
+          base: master
+          branch: dotnet_update
+
+