Only include heads for requested MultiTargets if Components that use them were included

Author: Arlodotexe

GenerateAllSolution.ps1

@@ -111,28 +111,14 @@ $projects = [System.Collections.ArrayList]::new()
 # Common/Dependencies for shared infrastructure
 [void]$projects.Add(".\tooling\CommunityToolkit*\*.*proj")
 
-# Deployable sample gallery heads 
-# TODO: this handles separate project heads, but won't directly handle the unified Skia head from Uno.
-# Once we have that, just do a transform on the csproj filename inside this loop to decide the same csproj for those separate MultiTargets.
-foreach ($multitarget in $MultiTargets) {
-    # capitalize first letter, avoid case sensitivity issues on linux
-    $csprojFileNamePartForMultiTarget = $multitarget.substring(0,1).ToUpper() + $multitarget.Substring(1).ToLower()
-
-    $path = ".\tooling\ProjectHeads\AllComponents\**\*.$csprojFileNamePartForMultiTarget.csproj";
-
-    if (Test-Path $path) {
-        [void]$projects.Add($path)
-    }
-    else {
-        Write-Warning "No project head could be found at $path for MultiTarget $multitarget. Skipping."
-    }
-}
-
 # Individual projects
 if ($Components -eq @('all')) {
     $Components = @('**')
 }
 
+
+$allUsedMultiTargetPrefs = @()
+
 foreach ($componentName in $Components) {
     if ($ExcludeComponents -contains $componentName) {
         continue;
@@ -141,11 +127,13 @@ foreach ($componentName in $Components) {
     foreach ($componentPath in Get-Item "$PSScriptRoot/../components/$componentName/") {
         $multiTargetPrefs = & $PSScriptRoot\MultiTarget\Get-MultiTargets.ps1 -component $($componentPath.BaseName)
 
-        $shouldReferenceInSolution = $multiTargetPrefs.Where({ $MultiTargets.Contains($_) }).Count -gt 0
-
+        $usedMultiTargetPrefs = $multiTargetPrefs.Where({ $MultiTargets.Contains($_) });
+        $shouldReferenceInSolution = $usedMultiTargetPrefs.Count -gt 0
+        
         if ($shouldReferenceInSolution) {
             Write-Output "Add component $componentPath to solution";
-
+            $allUsedMultiTargetPrefs += $usedMultiTargetPrefs
+            
             [void]$projects.Add(".\components\$($componentPath.BaseName)\src\*.csproj")
             [void]$projects.Add(".\components\$($componentPath.BaseName)\samples\*.Samples.csproj")
             [void]$projects.Add(".\components\$($componentPath.BaseName)\tests\*.shproj")
@@ -155,6 +143,26 @@ foreach ($componentName in $Components) {
     }
 }
 
+# Deployable sample gallery heads
+# Only include heads for requested MultiTargets if components were included that use them.
+# ===
+# TODO: this handles separate project heads, but won't directly handle the unified Skia head from Uno.
+# Once we have that, just do a transform on the csproj filename inside this loop to decide the same csproj for those separate MultiTargets.
+# ===
+foreach ($multitarget in $allUsedMultiTargetPrefs) {
+    # capitalize first letter, avoid case sensitivity issues on linux
+    $csprojFileNamePartForMultiTarget = $multitarget.substring(0,1).ToUpper() + $multitarget.Substring(1).ToLower()
+
+    $path = ".\tooling\ProjectHeads\AllComponents\**\*.$csprojFileNamePartForMultiTarget.csproj";
+
+    if (Test-Path $path) {
+        [void]$projects.Add($path)
+    }
+    else {
+        Write-Warning "No project head could be found at $path for MultiTarget $multitarget. Skipping."
+    }
+}
+
 if ($UseDiagnostics.IsPresent)
 {
     $sdkoptions = "-d"