bugfix: Fix error on splitting the filename and ext part of files having multiple dots

src/ConfigurationTransform.Test/ConfigTransformManagerTest.cs

@@ -23,6 +23,7 @@ public class ConfigTransformManagerTest
         const string TransformAppConfig = @"app.MockBuild.config";
         const string TransformWithoutConfigExtension = @"app.MockBuild";
         const string FileWith3Dots = @"mockfile.mockMiddle.mock";
+        const string FileWithMoreDots = @"file.with.more.dots.config";
 
         const string BuildMock = @"MockBuild";
 
@@ -58,6 +59,21 @@ public void GetTransformConfigName_Throws_NotSupportedException()
             ConfigTransformManager.GetTransformConfigName(sourceConfigName, buildConfigurationName);
         }
 
+        [TestMethod]
+        public void GetTransformConfigName_WhenMoreDots_Success()
+        {
+            //Arrange
+            const string sourceConfigName = FileWithMoreDots;
+            const string buildConfigurationName = BuildMock;
+            const string expected = @"file.with.more.dots.MockBuild.config";
+
+            //Act
+            var actual = ConfigTransformManager.GetTransformConfigName(sourceConfigName, buildConfigurationName);
+
+            //Assert
+            Assert.AreEqual(expected, actual);
+        }
+
         [TestMethod]
         public void IsRootAppConfig_WhenAppAndConfig_ReturnTrue()
         {

src/ConfigurationTransform.Test/ConfigurationTransform.Test.csproj

@@ -83,6 +83,7 @@
     <Compile Include="ConfigTransformManagerTest.cs" />
     <Compile Include="ProjectItemExtensionsTest.cs" />
     <Compile Include="ProjectItemsExtensionsTest.cs" />
+    <Compile Include="VsProjectXmlTransformTest.cs" />
     <Compile Include="VsServicesTest.cs" />
     <Compile Include="XmlTransformTest.cs" />
   </ItemGroup>

src/ConfigurationTransform.Test/VsProjectXmlTransformTest.cs

@@ -0,0 +1,54 @@
+using GolanAvraham.ConfigurationTransform.Services;
+using GolanAvraham.ConfigurationTransform.Transform;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConfigurationTransform.Test
+{
+    [TestClass]
+    public class VsProjectXmlTransformTest
+    {
+        const string FileWithMoreDots = "file.with.more.dots.config";
+
+        private VsProjectXmlTransform vsProjectXmlTransform;
+
+        [TestInitialize]
+        public void Setup()
+        {
+            var vsSerivces = new Mock<IVsServices>();
+            vsProjectXmlTransform = new VsProjectXmlTransform(vsSerivces.Object);
+        }
+
+        [TestMethod]
+        public void GetTargetTransformArgs_WhenMoreDotsConfigName_Success()
+        {
+            //Arrange
+            var configName = FileWithMoreDots;
+            var relativePrefix = @"..\my.common";
+            var expected = new TargetTransformArgs {
+                ConfigExt = "config",
+                Transform = @"..\my.common\file.with.more.dots.$(Configuration).config",
+                Source = @"..\my.common\file.with.more.dots.config",
+                Destination = @"$(OutputPath)file.with.more.dots.config",
+                Condition = @"Exists('..\my.common\file.with.more.dots.$(Configuration).config')"
+            };
+
+            //Act
+            var args = vsProjectXmlTransform.GetTargetTransformArgs(configName, relativePrefix, true);
+
+            //Assert
+            Assert.IsNotNull(args);
+            Assert.AreEqual(expected.Condition, args.Condition);
+            Assert.AreEqual(expected.ConfigExt, args.ConfigExt);
+            Assert.AreEqual(expected.Destination, args.Destination);
+            Assert.AreEqual(expected.Source, args.Source);
+            Assert.AreEqual(expected.Transform, args.Transform);
+        }
+
+    }
+}

src/ConfigurationTransform/Transform/ConfigTransformManager.cs

@@ -234,9 +234,11 @@ private static void CreateConfigFiles(Project project, ProjectItem projectItem)
 
         public static string GetTransformConfigName(string sourceConfigName, string buildConfigurationName)
         {
-            var configSplit = sourceConfigName.Split('.');
-            if (configSplit.Length < 2) throw new NotSupportedException(sourceConfigName);
-            var dependentConfig = $"{configSplit[0]}.{buildConfigurationName}.{configSplit[1]}";
+            var splitterIndex = sourceConfigName.LastIndexOf('.');
+            if(splitterIndex < 0)
+                throw new NotSupportedException(sourceConfigName);
+
+            var dependentConfig = $"{sourceConfigName.Substring(0, splitterIndex)}.{buildConfigurationName}.{sourceConfigName.Substring(splitterIndex + 1)}";
             return dependentConfig;
         }
 

src/ConfigurationTransform/Transform/VsProjectXmlTransform.cs

@@ -1,6 +1,8 @@
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Text.RegularExpressions;
 using System.Xml.Linq;
 using GolanAvraham.ConfigurationTransform.Services;
 
@@ -160,9 +162,12 @@ public void AddAfterBuildTarget(string anyConfigName, string relativePrefix = nu
         public TargetTransformArgs GetTargetTransformArgs(string anyConfigName, string relativePrefix = null,
             bool transformConfigIsLink = false)
         {
-            var configSplit = anyConfigName.Split('.');
-            var configName = configSplit[0];
-            var configExt = configSplit[1];
+            var splitterIndex = anyConfigName.LastIndexOf('.');
+            if (splitterIndex < 0)
+                throw new NotSupportedException(anyConfigName);
+
+            var configName = anyConfigName.Substring(0, splitterIndex);
+            var configExt = anyConfigName.Substring(splitterIndex + 1);
 
             if (relativePrefix != null)
             {