add support Absolute Path Template

Author: Ahoo-Wang

build/version.props

@@ -2,7 +2,7 @@
 	<PropertyGroup>
 		<VersionMajor>2</VersionMajor>
 		<VersionMinor>2</VersionMinor>
-		<VersionPatch>40</VersionPatch>
+		<VersionPatch>42</VersionPatch>
 		<VersionPrefix>$(VersionMajor).$(VersionMinor).$(VersionPatch)</VersionPrefix>
 	</PropertyGroup>
 </Project>

src/SmartCode.TemplateEngine/Impl/OfficialRazorTemplateEngine.cs

@@ -1,6 +1,8 @@
 //*******************************
 // Thx https://github.com/aspnet/Entropy/tree/master/samples/Mvc.RenderViewToString
 //*******************************
+
+using System;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Hosting.Internal;
 using Microsoft.AspNetCore.Mvc.Razor;
@@ -11,17 +13,21 @@
 using SmartCode.Utilities;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Reflection;
 using System.Text.Encodings.Web;
 using System.Threading.Tasks;
+using Microsoft.Extensions.FileProviders.Physical;
 
 namespace SmartCode.TemplateEngine.Impl
 {
     public class OfficialRazorTemplateEngine : ITemplateEngine
     {
+        private const string TEMP = ".temp";
         public bool Initialized { get; private set; }
         public string Name { get; private set; } = "Razor";
         private string _root = AppPath.Relative("RazorTemplates");
+        private string _temp;
         private IServiceScopeFactory _scopeFactory;
         public void Initialize(IDictionary<string, object> parameters)
         {
@@ -37,15 +43,34 @@ public void Initialize(IDictionary<string, object> parameters)
                     _root = root;
                 }
             }
+            _temp = Path.Combine(_root, TEMP);
+            if (!Directory.Exists(_temp))
+            {
+                Directory.CreateDirectory(_temp);
+            }
             InitializeServices();
         }
 
-        public Task<string> Render(BuildContext context)
+        public async Task<string> Render(BuildContext context)
         {
             using (var serviceScope = _scopeFactory.CreateScope())
             {
                 var helper = serviceScope.ServiceProvider.GetRequiredService<OfficialRazorViewToStringRenderer>();
-                return helper.RenderViewToStringAsync(context.Build.TemplateEngine.FullPath, context);
+                var viewPath = context.Build.TemplateEngine.FullPath;
+                if (Path.IsPathRooted(viewPath))
+                {
+                    var tempFileName = $"{Path.GetFileNameWithoutExtension(viewPath)}-{Guid.NewGuid():N}{Path.GetExtension(viewPath)}";
+                    var destFileName = Path.Combine(_temp, tempFileName);
+                    File.Copy(context.Build.TemplateEngine.FullPath, destFileName);
+                    viewPath = Path.Combine(TEMP, tempFileName);
+                    var result = await helper.RenderViewToStringAsync(viewPath, context);
+                    File.Delete(destFileName);
+                    return result;
+                }
+                else
+                {
+                    return await helper.RenderViewToStringAsync(viewPath, context);
+                }
             }
         }
 
@@ -58,7 +83,7 @@ private void InitializeServices()
         private IServiceCollection ConfigureDefaultServices()
         {
             var services = new ServiceCollection();
-            IFileProvider fileProvider = new PhysicalFileProvider(_root);
+            IFileProvider fileProvider = new PhysicalFileProvider(_root, ExclusionFilters.None);
             services.AddSingleton<IHostingEnvironment>(new HostingEnvironment
             {
                 ApplicationName = Assembly.GetEntryAssembly().GetName().Name,