Extended run-time compilation to Razor Class Library

By default, run-time compilation only affects the local views. With the help of the `FileProviders` option, however, we can additionally watch and compile the views from the Razor Class Library, which is in a separate project than the run-time host.

Author: JeremyCaney

OnTopic.Editor.AspNetCore.Host/Startup.cs

@@ -90,6 +90,10 @@ public void ConfigureServices(IServiceCollection services) {
       \-----------------------------------------------------------------------------------------------------------------------*/
       if (HostingEnvironment.IsDevelopment()) {
         mvcBuilder.AddRazorRuntimeCompilation();
+        services.Configure<MvcRazorRuntimeCompilationOptions>(options => {
+          var libraryPath = Path.GetFullPath(Path.Combine(HostingEnvironment.ContentRootPath, "..", "OnTopic.Editor.AspNetCore"));
+          options.FileProviders.Add(new PhysicalFileProvider(libraryPath));
+        });
       }
 
       /*------------------------------------------------------------------------------------------------------------------------