CompileTargets moved to MSBuild

CompileTargets moved to MSBuild. Still need to work on input/outputs, refactoring of targets, specially around CompileStage and moving some of the tasks back to msbuild instead of C# code.

build_projects/dotnet-cli-build/RemoveAssetFromDepsPackages.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.Compression;
+using System.Runtime.InteropServices;
+using System.Net.Http;
+using Microsoft.Build.Utilities;
+using Microsoft.DotNet.Cli.Build.Framework;
+using Microsoft.DotNet.InternalAbstractions;
+using Microsoft.Build.Framework;
+using Microsoft.Build.Utilities;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+using static Microsoft.DotNet.Cli.Build.Framework.BuildHelpers;
+
+namespace Microsoft.DotNet.Cli.Build
+{
+    public class RemoveAssetFromDepsPackages : Task
+    {
+        public string DepsFile { get; set; }
+
+        public string SectionName { get; set; }
+
+        public string AssetPath { get; set; }
+
+        public override bool Execute()
+        {
+            DoRemoveAssetFromDepsPackages(DepsFile, SectionName, AssetPath);
+
+            return true;
+        }
+
+        private static void DoRemoveAssetFromDepsPackages(string depsFile, string sectionName, string assetPath)
+        {
+            JToken deps;
+            using (var file = File.OpenText(depsFile))
+            using (JsonTextReader reader = new JsonTextReader(file))
+            {
+                deps = JObject.ReadFrom(reader);
+            }
+
+            foreach (JProperty target in deps["targets"])
+            {
+                foreach (JProperty pv in target.Value.Children<JProperty>())
+                {
+                    var section = pv.Value[sectionName];
+                    if (section != null)
+                    {
+                        foreach (JProperty relPath in section)
+                        {
+                            if (assetPath.Equals(relPath.Name))
+                            {
+                                relPath.Remove();
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            using (var file = File.CreateText(depsFile))
+            using (var writer = new JsonTextWriter(file) { Formatting = Formatting.Indented })
+            {
+                deps.WriteTo(writer);
+            }
+        }
+    }
+}