add xamarin tool version

get-new-tool-versions/get-new-tool-versions.ps1

@@ -3,7 +3,7 @@
 Check and return list of new available tool versions
 
 .PARAMETER ToolName
-Required parameter. The name of tool for which parser is available (Node, Go, Python)
+Required parameter. The name of tool for which parser is available (Node, Go, Python, Xamarin)
 #>
 
 param (
@@ -16,10 +16,18 @@ $ToolVersionParser = Get-ToolVersionsParser -ToolName $ToolName
 $VersionsFromDist = $ToolVersionParser.GetAvailableVersions()
 $VersionsFromManifest = $ToolVersionParser.GetUploadedVersions()
 
-$VersionsToBuild = $VersionsFromDist | Where-Object { $VersionsFromManifest -notcontains $_ }
+$joinChars = ", "
+if ($ToolName -eq "Xamarin") {
+    $VersionsToBuild = $VersionsFromDist | Where-Object { $VersionsFromManifest[$_.name] -notcontains $_.version } | ForEach-Object {
+        '{0,-15} : {1}' -f $_.name, $_.version
+    }
+    $joinChars = "\n"
+} else {
+    $VersionsToBuild = $VersionsFromDist | Where-Object { $VersionsFromManifest -notcontains $_ }
+}
 
 if ($VersionsToBuild) {
-    $availableVersions = $VersionsToBuild -join ", "
+    $availableVersions = $VersionsToBuild -join $joinChars
     Write-Host "The following versions are available to build:`n${availableVersions}"
     Write-Host "##vso[task.setvariable variable=TOOL_VERSIONS;isOutput=true]${availableVersions}"
 } else {

get-new-tool-versions/parsers/parsers-factory.psm1

@@ -1,6 +1,7 @@
 using module "./node-parser.psm1"
 using module "./go-parser.psm1"
 using module "./python-parser.psm1"
+using module "./xamarin-parser.psm1"
 
 function Get-ToolVersionsParser {
     param(
@@ -12,6 +13,7 @@ function Get-ToolVersionsParser {
         "Node" { return [NodeVersionsParser]::New() }
         "Go" { return [GoVersionsParser]::New() }
         "Python" { return [PythonVersionsParser]::New() }
+        "Xamarin" { return [XamarinversionsParser]::New() }
         Default {
             throw "Unknown tool name"
         }

get-new-tool-versions/parsers/xamarin-parser.psm1

@@ -0,0 +1,30 @@
+using module "./base-parser.psm1"
+
+class XamarinVersionsParser: BaseVersionsParser {
+    [PSCustomObject] GetAvailableVersions() {
+        $allVersions = $this.ParseAllAvailableVersions()
+        return $allVersions
+    }
+
+    [hashtable] GetUploadedVersions() {
+        $url = $this.BuildGitHubFileUrl("actions", "virtual-environments", "main", "images/macos/toolsets/toolset-11.0.json")
+        $releases = Invoke-RestMethod $url -MaximumRetryCount $this.ApiRetryCount -RetryIntervalSec $this.ApiRetryIntervalSeconds
+        $xamarin = $releases.xamarin
+        $xamarinReleases = @{
+            'Mono Framework' = $xamarin.'mono-versions'
+            'Xamarin.Android' = $xamarin.'android-versions'
+            'Xamarin.iOS' = $xamarin.'ios-versions'
+            'Xamarin.Mac' = $xamarin.'mac-versions'
+        }
+        return $xamarinReleases
+    }
+
+    hidden [PSCustomObject] ParseAllAvailableVersions() {
+        $url = "http://aka.ms/manifest/stable"
+        $filteredProducts = @('Mono Framework', 'Xamarin.Android', 'Xamarin.iOS', 'Xamarin.Mac')
+        $releases = Invoke-RestMethod $url -MaximumRetryCount $this.ApiRetryCount -RetryIntervalSec $this.ApiRetryIntervalSeconds
+        $items = $releases.items
+        $products = $items | Where-Object {$_.name -in $filteredProducts} | Sort-Object name | Select-Object name, version
+        return $products
+    }
+}