fix(autoupdate): Update array of arrays correctly (#4502)

Author: niheaven

lib/autoupdate.ps1

@@ -346,15 +346,25 @@ function Update-ManifestProperty {
                 }
             } elseif ($Manifest.$currentProperty -and $Manifest.autoupdate.$currentProperty) {
                 # Update other property (global)
-                $newValue = substitute $Manifest.autoupdate.$currentProperty $Substitutions
+                $autoupdateProperty = $Manifest.autoupdate.$currentProperty
+                $newValue = substitute $autoupdateProperty $Substitutions
+                if (($autoupdateProperty.GetType().Name -eq 'Object[]') -and ($autoupdateProperty.Length -eq 1)) {
+                    # Make sure it's an array
+                    $newValue = ,$newValue
+                }
                 $Manifest.$currentProperty, $hasPropertyChanged = PropertyHelper -Property $Manifest.$currentProperty -Value $newValue
                 $hasManifestChanged = $hasManifestChanged -or $hasPropertyChanged
             } elseif ($Manifest.architecture) {
                 # Update other property (arch-spec)
                 $Manifest.architecture | Get-Member -MemberType NoteProperty | ForEach-Object {
                     $arch = $_.Name
                     if ($Manifest.architecture.$arch.$currentProperty -and ($Manifest.autoupdate.architecture.$arch.$currentProperty -or $Manifest.autoupdate.$currentProperty)) {
-                        $newValue = substitute (arch_specific $currentProperty $Manifest.autoupdate $arch) $Substitutions
+                        $autoupdateProperty = @(arch_specific $currentProperty $Manifest.autoupdate $arch)
+                        $newValue = substitute $autoupdateProperty $Substitutions
+                        if (($autoupdateProperty.GetType().Name -eq 'Object[]') -and ($autoupdateProperty.Length -eq 1)) {
+                            # Make sure it's an array
+                            $newValue = ,$newValue
+                        }
                         $Manifest.architecture.$arch.$currentProperty, $hasPropertyChanged = PropertyHelper -Property $Manifest.architecture.$arch.$currentProperty -Value $newValue
                         $hasManifestChanged = $hasManifestChanged -or $hasPropertyChanged
                     }

lib/core.ps1

@@ -864,7 +864,7 @@ function substitute($entity, [Hashtable] $params, [Bool]$regexEscape = $false) {
                 }
             }
             'Object[]' {
-                $newentity = $entity | ForEach-Object { substitute $_ $params $regexEscape }
+                $newentity = $entity | ForEach-Object { ,(substitute $_ $params $regexEscape) }
             }
             'PSCustomObject' {
                 $newentity.PSObject.Properties | ForEach-Object { $_.Value = substitute $_.Value $params $regexEscape }