chore: Adjust for macOS build for android

src/SourceGenerators/Uno.UI.Tasks/Assets/RetargetAssets.cs

@@ -93,6 +93,8 @@ private TaskItem ProcessContentItem(ITaskItem asset, Func<ResourceCandidate, str
 				relativePath = fullPath.Replace(asset.GetMetadata("DefiningProjectDirectory"), "");
 			}
 
+			relativePath = AlignPath(relativePath);
+
 			if (IsImageAsset(asset.ItemSpec))
 			{
 				var resourceCandidate = ResourceCandidate.Parse(fullPath, relativePath);
@@ -141,5 +143,10 @@ private static bool IsImageAsset(string path)
 				|| extension == ".jpeg"
 				|| extension == ".gif";
 		}
+
+		private static string AlignPath(string path)
+			=> path
+			.Replace('/', Path.DirectorySeparatorChar)
+			.Replace('\\', Path.DirectorySeparatorChar);
 	}
 }

src/Uno.UI.RuntimeTests/Tests/Windows_Storage/Given_StorageFile.cs

@@ -352,7 +352,7 @@ public async Task When_Project_Transitive_Asset()
 			}
 			catch (Exception ex)
 			{
-				Assert.Fail("Transitive asset could not be found " + ex.Message);
+				Assert.Fail("Transitive asset could not be found: " + ex);
 			}
 		}
 

src/Uno.UWP/Storage/StorageFile.android.cs

@@ -33,7 +33,7 @@ private static async Task<StorageFile> GetFileFromApplicationUri(CancellationTok
 
 			if (uri.Host is { Length: > 0 } host)
 			{
-				originalPath = host + "/" + originalPath.TrimStart('/');
+				originalPath = host.ToLowerInvariant() + "/" + originalPath.TrimStart('/');
 			}
 
 			var path = AndroidResourceNameEncoder.EncodeResourcePath(originalPath);

src/Uno.UWP/Storage/StorageFile.iOSmacOS.cs

@@ -27,7 +27,7 @@ private static async Task<StorageFile> GetFileFromApplicationUri(CancellationTok
 			{
 				if (uri.Host is { Length: > 0 } host)
 				{
-					directoryName = host + "/" + directoryName.TrimStart('/');
+					directoryName = host.ToLowerInvariant() + "/" + directoryName.TrimStart('/');
 				}
 
 				var resourcePathname = NSBundle.MainBundle.PathForResource(global::System.IO.Path.Combine(directoryName, fileName), fileExtension.Substring(1));