Use Repair-WinGetPackageManager as a fallback install method (#137066)

* Use Repair-WinGetPackageManager instead of managing dependencies directly

* Remove download of the dependencies

* Add back some spaces

* Update experimental features

* * Fix error with variable parsing
* Fix ScriptAnalyzer warnings
* Add Try-Catch
* Update comment

* Missed a variable

* Use function for backup instead of as primary

Tools/SandboxTest.ps1

@@ -112,10 +112,11 @@ $oldProgressPreference = $ProgressPreference
 $ProgressPreference = 'SilentlyContinue'
 
 $latestRelease = Get-Release
+$versionTag = $latestRelease.releaseTag
 $desktopAppInstaller = @{
   url    = $latestRelease.msixFileUrl
   hash   = $latestRelease.shaFileContent
-  SaveTo = $(Join-Path $env:LOCALAPPDATA -ChildPath "Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\bin\$($latestRelease.releaseTag)\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle")
+  SaveTo = $(Join-Path $env:LOCALAPPDATA -ChildPath "Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\bin\$versionTag\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle")
 }
 
 $ProgressPreference = $oldProgressPreference
@@ -165,11 +166,15 @@ foreach ($dependency in $dependencies) {
       $WebClient.DownloadFile($dependency.url, $dependency.SaveTo)
 
     } catch {
-      #Pass the exception as an inner exception
-      throw [System.Net.WebException]::new("Error downloading $($dependency.url).", $_.Exception)
+      # If the download failed, remove the item so the sandbox can fall-back to using the PowerShell module
+      Remove-Item $dependency.SaveTo -Force | Out-Null
     }
     if (-not ($dependency.hash -eq $(Get-FileHash $dependency.SaveTo).Hash)) {
-      throw [System.Activities.VersionMismatchException]::new('Dependency hash does not match the downloaded file')
+      # If the hash didn't match, remove the item so the sandbox can fall-back to using the PowerShell module
+      Write-Host -ForegroundColor Red '      Dependency hash does not match the downloaded file'
+      Write-Host -ForegroundColor Red '      Please open an issue referencing this error at https://bit.ly/WinGet-SandboxTest-Needs-Update'
+      Write-Host
+      Remove-Item $dependency.SaveTo -Force | Out-Null
     }
   }
 }
@@ -226,7 +231,23 @@ Write-Host @'
 --> Installing WinGet
 '@
 `$ProgressPreference = 'SilentlyContinue'
-Add-AppxPackage -Path '$($desktopAppInstaller.pathInSandbox)' -DependencyPath '$($vcLibsUwp.pathInSandbox)','$($uiLibsUwp.pathInSandbox)'
+try {
+  Add-AppxPackage -Path '$($desktopAppInstaller.pathInSandbox)' -DependencyPath '$($vcLibsUwp.pathInSandbox)','$($uiLibsUwp.pathInSandbox)'
+} catch {
+  Write-Host -ForegroundColor Red 'Could not install from cached packages. Falling back to Repair-WinGetPackageManager cmdlet'
+  try {
+    Install-PackageProvider -Name NuGet -Force | Out-Null
+    Install-Module -Name Microsoft.WinGet.Client -Force -Repository PSGallery | Out-Null
+  } catch {
+    throw "Microsoft.Winget.Client was not installed successfully"
+  } finally {
+    # Check to be sure it acutally installed
+    if (-not(Get-Module -ListAvailable -Name Microsoft.Winget.Client)) {
+      throw "Microsoft.Winget.Client was not found. Check that the Windows Package Manager PowerShell module was installed correctly."
+    }
+  }
+  Repair-WinGetPackageManager -Version $versionTag
+}
 
 Write-Host @'
 --> Disabling safety warning when running installer