Update namespace generation in RazorCompilationService to use root

relative paths.

samples/MvcSample/Home2Controller.cs

@@ -1,6 +1,6 @@
-using System.Text;
-using Microsoft.AspNet.Abstractions;
+using Microsoft.AspNet.Abstractions;
 using Microsoft.AspNet.Mvc;
+using MvcSample.Models;
 
 namespace MvcSample
 {

samples/MvcSample/HomeController.cs

@@ -1,5 +1,5 @@
 using Microsoft.AspNet.Mvc;
-using Microsoft.Owin;
+using MvcSample.Models;
 
 namespace MvcSample
 {

samples/MvcSample/Models/User.cs

@@ -1,4 +1,4 @@
-namespace MvcSample
+namespace MvcSample.Models
 {
     public class User
     {

samples/MvcSample/Views/Home/MyView.cshtml

@@ -1,4 +1,4 @@
-
+@using MvcSample.Models
 @{
     Layout = "/Views/Shared/_Layout.cshtml";
     ViewBag.Title = "Home Page";
@@ -9,9 +9,11 @@
     <p class="lead">ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS and JavaScript.</p>
     <p><a href="http://asp.net" class="btn btn-primary btn-large">Learn more &raquo;</a></p>
 </div>
-
+@{
+    var user = new User { Name = "Test user" };
+}
 <div class="row">
-    <h3>Hello!</h3>
+    <h3>Hello @user.Name!</h3>
     <div class="col-md-4">
         <h2>Getting started</h2>
         <p>
@@ -32,4 +34,3 @@
         <p><a class="btn btn-default" href="http://go.microsoft.com/fwlink/?LinkId=301867">Learn more &raquo;</a></p>
     </div>
 </div>
-

src/Microsoft.AspNet.Mvc.Razor/Compilation/CscBasedCompilationService.cs

@@ -7,7 +7,6 @@ using System.Linq;
 using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
-using Microsoft.AspNet.FileSystems;
 
 namespace Microsoft.AspNet.Mvc.Razor
 {
@@ -118,8 +117,6 @@ namespace Microsoft.AspNet.Mvc.Razor
 
             return process;
         }
-
-
     }
 }
 #endif

src/Microsoft.AspNet.Mvc.Razor/Razor/IRazorCompilationService.cs

@@ -5,6 +5,6 @@ namespace Microsoft.AspNet.Mvc.Razor
 {
     public interface IRazorCompilationService
     {
-        Task<CompilationResult> Compile(IFileInfo fileInfo);
+        Task<CompilationResult> Compile(string appRoot, IFileInfo fileInfo);
     }
 }

src/Microsoft.AspNet.Mvc.Razor/Razor/RazorCompilationService.cs

@@ -1,7 +1,7 @@
 using System;
+using System.Diagnostics.Contracts;
 using System.IO;
 using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Microsoft.AspNet.FileSystems;
 using Microsoft.AspNet.Razor;
@@ -20,17 +20,25 @@ namespace Microsoft.AspNet.Mvc.Razor
             _razorHost = razorHost;
         }
 
-        public Task<CompilationResult> Compile(IFileInfo file)
+        public Task<CompilationResult> Compile(string appRoot, IFileInfo file)
         {
-            return _cache.GetOrAdd(file, () => CompileCore(file));
+            return _cache.GetOrAdd(file, () => CompileCore(appRoot, file));
         }
 
-        private async Task<CompilationResult> CompileCore(IFileInfo file)
+        private async Task<CompilationResult> CompileCore(string appRoot, IFileInfo file)
         {
             GeneratorResults results;
             using (Stream inputStream = file.CreateReadStream())
             {
-                results = _razorHost.GenerateCode(file.PhysicalPath, inputStream);
+                Contract.Assert(file.PhysicalPath.StartsWith(appRoot, StringComparison.OrdinalIgnoreCase));
+                // Remove the app name segment so that it appears as part of the root relative path: 
+                // work/src/myapp/ -> work/src
+                // root relative path: myapp/views/home/index.cshtml
+                // TODO: The root namespace might be a property we'd have to read via configuration since it 
+                // affects other things such as resx files.
+                appRoot = Path.GetDirectoryName(appRoot.TrimEnd(Path.DirectorySeparatorChar));
+                string rootRelativePath = file.PhysicalPath.Substring(appRoot.Length).TrimStart(Path.DirectorySeparatorChar);
+                results = _razorHost.GenerateCode(rootRelativePath, inputStream);
             }
 
             if (!results.Success)

src/Microsoft.AspNet.Mvc.Razor/ViewEngine/PathBasedViewFactory.cs

@@ -17,10 +17,12 @@ namespace Microsoft.AspNet.Mvc.Razor
 
         public async Task<IView> CreateInstance(string virtualPath)
         {
+            // TODO: We need to glean the approot from HttpContext
+            var appRoot = ((PhysicalFileSystem)_fileSystem).Root;
             IFileInfo fileInfo;
             if (_fileSystem.TryGetFileInfo(virtualPath, out fileInfo))
             {
-                CompilationResult result = await _compilationService.Compile(fileInfo);
+                CompilationResult result = await _compilationService.Compile(appRoot, fileInfo);
                 return (IView)Activator.CreateInstance(result.CompiledType);
             }