Added MultipleFiles.ttinclude.

T4Models.sln

@@ -22,6 +22,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Templates", "Templates", "{
 		Templates\LinqToDB.SqlServer.ttinclude = Templates\LinqToDB.SqlServer.ttinclude
 		Templates\LinqToDB.Sybase.ttinclude = Templates\LinqToDB.Sybase.ttinclude
 		Templates\LinqToDB.ttinclude = Templates\LinqToDB.ttinclude
+		Templates\MultipleFiles.ttinclude = Templates\MultipleFiles.ttinclude
 		Templates\NotifyPropertyChanged.ttinclude = Templates\NotifyPropertyChanged.ttinclude
 		Templates\ObsoleteAttributes.ttinclude = Templates\ObsoleteAttributes.ttinclude
 		Templates\PluralizationService.ttinclude = Templates\PluralizationService.ttinclude

Templates/MultipleFiles.ttinclude

@@ -0,0 +1,70 @@
+<#@ assembly name="System.Core"                   #>
+<#@ assembly name="EnvDTE"                        #>
+<#@ import namespace="System.Collections.Generic" #>
+<#@ import namespace="System.IO"                  #>
+<#@ import namespace="System.Linq"                #>
+<#@ import namespace="EnvDTE"                     #>
+<#+
+DTE _dte;
+DTE  DTE => _dte ?? (_dte = (DTE)((IServiceProvider)Host).GetService(typeof(DTE)));
+
+ProjectItem _templateProjectItem;
+ProjectItem  TemplateProjectItem => _templateProjectItem ?? (_templateProjectItem = DTE.Solution.FindProjectItem(Host.TemplateFile));
+
+readonly Dictionary<string,int> _fileNames = new Dictionary<string,int>();
+
+Func<string,string,bool> CompareContent = (s1,s2) => s1 == s2;
+
+void SaveOutput(string fileName, int fileType = 1)
+{
+	var dir        = Path.GetDirectoryName(Host.TemplateFile);
+	var output     = Path.Combine(dir, fileName);
+	var newContent = GenerationEnvironment.ToString();
+	var oldContent = File.Exists(output) ? File.ReadAllText(output) : "";
+
+	if (!CompareContent(newContent, oldContent))
+	{
+		if (DTE.SourceControl != null && DTE.SourceControl.IsItemUnderSCC(output) && !DTE.SourceControl.IsItemCheckedOut(output))
+			DTE.SourceControl.CheckOutItem(output);
+
+		File.WriteAllText(output, newContent);
+	}
+
+	GenerationEnvironment.Length = 0;
+
+	_fileNames.Add(output, fileType);
+}
+
+void SyncProject()
+{
+	var keepFileNames      = _fileNames.ToDictionary(f => f.Key);
+	var projectFiles       = new Dictionary<string,ProjectItem>();
+	var templateFileName   = TemplateProjectItem.FileNames[0];
+	var originalFilePrefix = Path.GetFileNameWithoutExtension(templateFileName) + ".";
+
+	foreach (ProjectItem projectItem in TemplateProjectItem.ProjectItems)
+	{
+		projectFiles.Add(projectItem.FileNames[0], projectItem);
+	}
+
+	foreach (var pair in projectFiles)
+	{
+		if (!keepFileNames.ContainsKey(pair.Key))
+			if (!(Path.GetFileNameWithoutExtension(pair.Key) + ".").StartsWith(originalFilePrefix))
+			//if (pair.Key != templateFileName)
+				pair.Value.Delete();
+	}
+
+	// Add missing files to the project.
+	//
+	foreach (var fileName in keepFileNames)
+	{
+		if (!projectFiles.ContainsKey(fileName.Value.Key))
+		if (File.Exists(fileName.Value.Key))
+		{
+			var newItem = TemplateProjectItem.ProjectItems.AddFromFile(fileName.Value.Key);
+			newItem.Properties.Item("BuildAction").Value = fileName.Value.Value;
+		}
+	}
+}
+#>

Tests/Tests/MultipleFiles.generated.cs

@@ -0,0 +1,6 @@
+//---------------------------------------------------------------------------------------------------
+// <auto-generated>
+//    This code was generated by T4 template.
+//    Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+// </auto-generated>
+//---------------------------------------------------------------------------------------------------

Tests/Tests/MultipleFiles.tt

@@ -0,0 +1,29 @@
+<#@ template language="C#" debug="True" hostSpecific="True" #>
+<#@ output extension=".generated.cs"                        #>
+<#@ include file="..\..\Templates\MultipleFiles.ttinclude"  #>
+//---------------------------------------------------------------------------------------------------
+// <auto-generated>
+//    This code was generated by T4 template.
+//    Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+// </auto-generated>
+//---------------------------------------------------------------------------------------------------
+<#
+	SaveOutput("aaa.cs", 1);
+#>
+//---------------------------------------------------------------------------------------------------
+// <auto-generated>
+//    This code was generated by T4 template.
+//    Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+// </auto-generated>
+//---------------------------------------------------------------------------------------------------
+<#
+	SaveOutput("bbb.txt", 2);
+
+	SyncProject();
+#>
+//---------------------------------------------------------------------------------------------------
+// <auto-generated>
+//    This code was generated by T4 template.
+//    Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+// </auto-generated>
+//---------------------------------------------------------------------------------------------------

Tests/Tests/T4Model.Tests.csproj

@@ -41,6 +41,9 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="aaa.cs">
+      <DependentUpon>MultipleFiles.tt</DependentUpon>
+    </Compile>
     <Compile Include="EditableModelTest.generated.cs">
       <DependentUpon>EditableModelTest.tt</DependentUpon>
       <AutoGen>True</AutoGen>
@@ -52,6 +55,11 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>ModelTest.tt</DependentUpon>
     </Compile>
+    <Compile Include="MultipleFiles.generated.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>MultipleFiles.tt</DependentUpon>
+    </Compile>
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
@@ -67,6 +75,17 @@
   <ItemGroup>
     <Service Include="{508349B6-6B84-4DF5-91F0-309BEEBAD82D}" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="MultipleFiles.tt">
+      <Generator>TextTemplatingFileGenerator</Generator>
+      <LastGenOutput>MultipleFiles.generated.cs</LastGenOutput>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="bbb.txt">
+      <DependentUpon>MultipleFiles.tt</DependentUpon>
+    </Content>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

Tests/Tests/aaa.cs

@@ -0,0 +1,7 @@
+
+//---------------------------------------------------------------------------------------------------
+// <auto-generated>
+//    This code was generated by T4 template.
+//    Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+// </auto-generated>
+//---------------------------------------------------------------------------------------------------

Tests/Tests/bbb.txt

@@ -0,0 +1,6 @@
+//---------------------------------------------------------------------------------------------------
+// <auto-generated>
+//    This code was generated by T4 template.
+//    Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.
+// </auto-generated>
+//---------------------------------------------------------------------------------------------------