xamarin-macios/msbuild/Xamarin.MacDev.Tasks.Core/Tasks/CreateEmbeddedResourcesTaskBase.cs

using System;
using System.Text;

using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;

namespace Xamarin.MacDev.Tasks {
	public abstract class CreateEmbeddedResourcesTaskBase : Task
	{
		[Required]
		public ITaskItem[] BundleResources { get; set; }

		[Required]
		public string Prefix { get; set; }

		[Output]
		public ITaskItem[] EmbeddedResources { get; set; }

		static string EscapeMangledResource (string name)
		{
			var mangled = new StringBuilder ();

			for (int i = 0; i < name.Length; i++) {
				switch (name[i]) {
				case '\\': mangled.Append ("_b"); break;
				case '/': mangled.Append ("_f"); break;
				case '_': mangled.Append ("__"); break;
				default: mangled.Append (name[i]); break;
				}
			}

			return mangled.ToString ();
		}

		public override bool Execute ()
		{
			EmbeddedResources = new ITaskItem[BundleResources.Length];

			for (int i = 0; i < BundleResources.Length; i++) {
				var bundleResource = BundleResources[i];

				// clone the item
				var embeddedResource = new TaskItem (bundleResource.ItemSpec);
				bundleResource.CopyMetadataTo (embeddedResource);

				// mangle the resource name
				var logicalName = "__" + Prefix + "_content_" + EscapeMangledResource (bundleResource.GetMetadata ("LogicalName"));
				embeddedResource.SetMetadata ("LogicalName", logicalName);

				// add it to the output connection
				EmbeddedResources[i] = embeddedResource;
			}
			
			return true;
		}
	}
}