Fix for "Unable to load bundles" while running using IIS Express (#422)

* New constructor with IHostingEnvironment

With the new constructor, bundle provider can access root path for the application. This will help resolve path for bundleconfig.json

* Update BundilProvider to use new constructor

The new constructor will ensure that the path resolved for bundleconfig.json is not based on working directory but based on hostingEnvironment.ContentRootPath

src/BundlerMinifier.TagHelpers/BundleTagHelper.cs

@@ -36,7 +36,7 @@ public BundleTagHelper(IHostingEnvironment hostingEnvironment, IMemoryCache cach
                 options.Configure(hostingEnvironment);
             }
 
-            _bundleProvider = bundleProvider ?? new BundleProvider();
+            _bundleProvider = bundleProvider ?? new BundleProvider(hostingEnvironment);
             _options = options;
             _hostingEnvironment = hostingEnvironment;
             _cache = cache;
@@ -138,4 +138,4 @@ private string GetSrc(string path)
             return null;
         }
     }
-}
+}

src/BundlerMinifier.TagHelpers/BundlesProvider.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using Microsoft.AspNetCore.Hosting;
 
 namespace BundlerMinifier.TagHelpers
 {
@@ -12,16 +13,31 @@ public class BundleProvider : IBundleProvider, IDisposable
         private IList<Bundle> _bundles;
         private FileSystemWatcher _fileWatcher;
 
-        public BundleProvider()
-            : this("bundleconfig.json")
+
+        public BundleProvider() : this(null)
         {
         }
 
-        public BundleProvider(string configurationPath)
+        public BundleProvider(IHostingEnvironment hostingEnvironment)
+            : this("bundleconfig.json", hostingEnvironment)
+        {
+        }
+
+        public BundleProvider(string configurationPath, IHostingEnvironment hostingEnvironment)
         {
             if (configurationPath == null) throw new ArgumentNullException(nameof(configurationPath));
 
-            var fullPath = Path.GetFullPath(configurationPath);
+            string filePath;
+            if (hostingEnvironment != null && string.IsNullOrWhiteSpace(Path.GetDirectoryName(configurationPath)))
+            {
+                filePath = Path.Combine(hostingEnvironment.ContentRootPath, configurationPath);
+            }
+            else
+            {
+                filePath = configurationPath;
+            }
+
+            var fullPath = Path.GetFullPath(filePath);
             var directory = Path.GetDirectoryName(fullPath);
             var fileName = Path.GetFileName(fullPath);
             _configurationPath = fullPath;
@@ -91,4 +107,4 @@ public void Dispose()
             }
         }
     }
-}
+}