use helper functions

images/win/scripts/ImageHelpers/InstallHelpers.ps1

@@ -418,3 +418,41 @@ function Install-AndroidSDKPackages {
         & $AndroidSDKManagerPath --sdk_root=$AndroidSDKRootPath "$PrefixPackageName$package"
     }
 }
+
+function Get-AndroidPackages {
+    Param
+    (
+        [Parameter(Mandatory=$true)]
+        [string]$AndroidSDKManagerPath
+    )
+
+    return (& $AndroidSDKManagerPath --list --verbose).Trim() | Foreach-Object { $_.Split()[0] } | Where-Object {$_}
+}
+
+function Get-AndroidPackagesByName {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string[]]$AndroidPackages,
+        [Parameter(Mandatory=$true)]
+        [string]$PrefixPackageName
+    )
+
+    return $AndroidPackages | Where-Object { "$_".StartsWith($PrefixPackageName) }
+}
+
+function Get-AndroidPackagesByVersion {
+    Param (
+        [Parameter(Mandatory=$true)]
+        [string[]]$AndroidPackages,
+        [Parameter(Mandatory=$true)]
+        [string]$PrefixPackageName,
+        [object]$MinimumVersion,
+        [char]$Delimeter,
+        [int]$Index = 0
+    )
+
+    $Type = $MinimumVersion.GetType()
+    $packagesByName = Get-AndroidPackagesByName -AndroidPackages $AndroidPackages -PrefixPackageName $PrefixPackageName
+    $packagesByVersion = $packagesByName | Where-Object { ($_.Split($Delimeter)[$Index] -as $Type) -ge $MinimumVersion }
+    return $packagesByVersion | Sort-Object { $_.Split($Delimeter)[$Index] -as $Type} -Unique
+}