Migrate MsgGen

8 files changed, 765 insertions, 0 deletions

diff --git a/WixBuildTools.sln b/WixBuildTools.sln
index 251fed6d..d7f21621 100644
--- a/WixBuildTools.sln
+++ b/WixBuildTools.sln
@@ -6,6 +6,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{00E50075-E89
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WixBuildTools.XsdGen", "src\WixBuildTools.XsdGen\WixBuildTools.XsdGen.csproj", "{E89E52C9-A4A1-4174-A1B1-3B72975E6ED6}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WixBuildTools.MsgGen", "src\WixBuildTools.MsgGen\WixBuildTools.MsgGen.csproj", "{DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}"
+EndProject
 Global
         GlobalSection(SolutionConfigurationPlatforms) = preSolution
                 Debug|Any CPU = Debug|Any CPU
@@ -28,12 +30,25 @@ Global
                 {E89E52C9-A4A1-4174-A1B1-3B72975E6ED6}.Release|x64.Build.0 = Release|Any CPU
                 {E89E52C9-A4A1-4174-A1B1-3B72975E6ED6}.Release|x86.ActiveCfg = Release|Any CPU
                 {E89E52C9-A4A1-4174-A1B1-3B72975E6ED6}.Release|x86.Build.0 = Release|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Debug|x64.Build.0 = Debug|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Debug|x86.Build.0 = Debug|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Release|Any CPU.Build.0 = Release|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Release|x64.ActiveCfg = Release|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Release|x64.Build.0 = Release|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Release|x86.ActiveCfg = Release|Any CPU
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4}.Release|x86.Build.0 = Release|Any CPU
         EndGlobalSection
         GlobalSection(SolutionProperties) = preSolution
                 HideSolutionNode = FALSE
         EndGlobalSection
         GlobalSection(NestedProjects) = preSolution
                 {E89E52C9-A4A1-4174-A1B1-3B72975E6ED6} = {00E50075-E896-42D1-AC30-2D2E7D129FB9}
+                {DB6EF6F3-51B1-4214-9A14-D501C23F6FA4} = {00E50075-E896-42D1-AC30-2D2E7D129FB9}
         EndGlobalSection
         GlobalSection(ExtensibilityGlobals) = postSolution
                 SolutionGuid = {83E9E075-B440-471A-9C37-9D84BA0AE3E0}
diff --git a/src/WixBuildTools.MsgGen/AssemblyInfo.cs b/src/WixBuildTools.MsgGen/AssemblyInfo.cs
new file mode 100644
index 00000000..378adbf0
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/AssemblyInfo.cs
@@ -0,0 +1,8 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+using System.Reflection;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyCulture("")]
diff --git a/src/WixBuildTools.MsgGen/GenerateMessageFiles.cs b/src/WixBuildTools.MsgGen/GenerateMessageFiles.cs
new file mode 100644
index 00000000..6f51dbf9
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/GenerateMessageFiles.cs
@@ -0,0 +1,250 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixBuildTools.MsgGen
+{
+    using System;
+    using System.CodeDom;
+    using System.Collections;
+    using System.Globalization;
+    using System.Reflection;
+    using System.Resources;
+    using System.Xml;
+
+    /// <summary>
+    /// Message files generation class.
+    /// </summary>
+    public class GenerateMessageFiles
+    {
+        /// <summary>
+        /// Generate the message files.
+        /// </summary>
+        /// <param name="messagesDoc">Input Xml document containing message definitions.</param>
+        /// <param name="codeCompileUnit">CodeDom container.</param>
+        /// <param name="resourceWriter">Writer for default resource file.</param>
+        public static void Generate(XmlDocument messagesDoc, CodeCompileUnit codeCompileUnit, ResourceWriter resourceWriter)
+        {
+            Hashtable usedNumbers = new Hashtable();
+
+            if (null == messagesDoc)
+            {
+                throw new ArgumentNullException("messagesDoc");
+            }
+
+            if (null == codeCompileUnit)
+            {
+                throw new ArgumentNullException("codeCompileUnit");
+            }
+
+            if (null == resourceWriter)
+            {
+                throw new ArgumentNullException("resourceWriter");
+            }
+
+            string namespaceAttr = messagesDoc.DocumentElement.GetAttribute("Namespace");
+            string resourcesAttr = messagesDoc.DocumentElement.GetAttribute("Resources");
+
+            // namespace
+            CodeNamespace messagesNamespace = new CodeNamespace(namespaceAttr);
+            codeCompileUnit.Namespaces.Add(messagesNamespace);
+
+            // imports
+            messagesNamespace.Imports.Add(new CodeNamespaceImport("System"));
+            messagesNamespace.Imports.Add(new CodeNamespaceImport("System.Reflection"));
+            messagesNamespace.Imports.Add(new CodeNamespaceImport("System.Resources"));
+            if (namespaceAttr != "WixToolset.Data")
+            {
+                messagesNamespace.Imports.Add(new CodeNamespaceImport("WixToolset.Data"));
+            }
+
+            foreach (XmlElement classElement in messagesDoc.DocumentElement.ChildNodes)
+            {
+                string className = classElement.GetAttribute("Name");
+                string baseContainerName = classElement.GetAttribute("BaseContainerName");
+                string containerName = classElement.GetAttribute("ContainerName");
+                string messageLevel = classElement.GetAttribute("Level");
+
+                // message container class
+                messagesNamespace.Types.Add(CreateContainer(namespaceAttr, baseContainerName, containerName, messageLevel, resourcesAttr));
+
+                // class
+                CodeTypeDeclaration messagesClass = new CodeTypeDeclaration(className);
+                messagesClass.TypeAttributes = TypeAttributes.Class | TypeAttributes.Public | TypeAttributes.Sealed;
+                messagesNamespace.Types.Add(messagesClass);
+
+                // private constructor (needed since all methods in this class are static)
+                CodeConstructor constructor = new CodeConstructor();
+                constructor.Attributes = MemberAttributes.Private;
+                constructor.ReturnType = null;
+                messagesClass.Members.Add(constructor);
+
+                // messages
+                foreach (XmlElement messageElement in classElement.ChildNodes)
+                {
+                    int number;
+                    string id = messageElement.GetAttribute("Id");
+                    string numberString = messageElement.GetAttribute("Number");
+                    bool sourceLineNumbers = true;
+
+                    // determine the message number (and ensure it was set properly)
+                    if (0 < numberString.Length)
+                    {
+                        number = Convert.ToInt32(numberString, CultureInfo.InvariantCulture);
+                    }
+                    else
+                    {
+                        throw new ApplicationException(String.Format("Message number must be assigned for {0} '{1}'.", containerName, id));
+                    }
+
+                    // check for message number collisions
+                    if (usedNumbers.Contains(number))
+                    {
+                        throw new ApplicationException(String.Format("Collision detected between two or more messages with number '{0}'.", number));
+                    }
+
+                    usedNumbers.Add(number, null);
+
+                    if ("no" == messageElement.GetAttribute("SourceLineNumbers"))
+                    {
+                        sourceLineNumbers = false;
+                    }
+
+                    int instanceCount = 0;
+                    foreach (XmlElement instanceElement in messageElement.ChildNodes)
+                    {
+                        string formatString = instanceElement.InnerText.Trim();
+                        string resourceName = String.Concat(className, "_", id, "_", (++instanceCount).ToString());
+
+                        // create a resource
+                        resourceWriter.AddResource(resourceName, formatString);
+
+                        // create method
+                        CodeMemberMethod method = new CodeMemberMethod();
+                        method.ReturnType = new CodeTypeReference(baseContainerName);
+                        method.Attributes = MemberAttributes.Public | MemberAttributes.Static;
+                        messagesClass.Members.Add(method);
+
+                        // method name
+                        method.Name = id;
+
+                        // return statement
+                        CodeMethodReturnStatement stmt = new CodeMethodReturnStatement();
+                        method.Statements.Add(stmt);
+
+                        // return statement expression
+                        CodeObjectCreateExpression expr = new CodeObjectCreateExpression();
+                        stmt.Expression = expr;
+
+                        // new struct
+                        expr.CreateType = new CodeTypeReference(containerName);
+
+                        // optionally have sourceLineNumbers as the first parameter
+                        if (sourceLineNumbers)
+                        {
+                            // sourceLineNumbers parameter
+                            expr.Parameters.Add(new CodeArgumentReferenceExpression("sourceLineNumbers"));
+                        }
+                        else
+                        {
+                            expr.Parameters.Add(new CodePrimitiveExpression(null));
+                        }
+
+                        // message number parameter
+                        expr.Parameters.Add(new CodePrimitiveExpression(number));
+
+                        // resource name parameter
+                        expr.Parameters.Add(new CodePrimitiveExpression(resourceName));
+
+                        // optionally have sourceLineNumbers as the first parameter
+                        if (sourceLineNumbers)
+                        {
+                            method.Parameters.Add(new CodeParameterDeclarationExpression("SourceLineNumber", "sourceLineNumbers"));
+                        }
+
+                        foreach (XmlNode parameterNode in instanceElement.ChildNodes)
+                        {
+                            XmlElement parameterElement;
+
+                            if (null != (parameterElement = parameterNode as XmlElement))
+                            {
+                                string type = parameterElement.GetAttribute("Type");
+                                string name = parameterElement.GetAttribute("Name");
+
+                                // method parameter
+                                method.Parameters.Add(new CodeParameterDeclarationExpression(type, name));
+
+                                // String.Format parameter
+                                expr.Parameters.Add(new CodeArgumentReferenceExpression(name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Create message container class.
+        /// </summary>
+        /// <param name="namespaceName">Namespace to use for resources stream.</param>
+        /// <param name="baseContainerName">Name of the base message container class.</param>
+        /// <param name="containerName">Name of the message container class.</param>
+        /// <param name="messageLevel">Message level of for the message.</param>
+        /// <param name="resourcesName">Name of the resources stream (will get namespace prepended).</param>
+        /// <returns>Message container class CodeDom object.</returns>
+        private static CodeTypeDeclaration CreateContainer(string namespaceName, string baseContainerName, string containerName, string messageLevel, string resourcesName)
+        {
+            CodeTypeDeclaration messageContainer = new CodeTypeDeclaration();
+
+            messageContainer.Name = containerName;
+            messageContainer.BaseTypes.Add(new CodeTypeReference(baseContainerName));
+
+            // constructor
+            CodeConstructor constructor = new CodeConstructor();
+            constructor.Attributes = MemberAttributes.Public;
+            constructor.ReturnType = null;
+            messageContainer.Members.Add(constructor);
+
+            CodeMemberField resourceManager = new CodeMemberField();
+            resourceManager.Attributes = MemberAttributes.Private | MemberAttributes.Static;
+            resourceManager.Name = "resourceManager";
+            resourceManager.Type = new CodeTypeReference("ResourceManager");
+            resourceManager.InitExpression = new CodeObjectCreateExpression("ResourceManager", new CodeSnippetExpression(String.Format("\"{0}.{1}\"", namespaceName, resourcesName)), new CodeSnippetExpression("Assembly.GetExecutingAssembly()"));
+            messageContainer.Members.Add(resourceManager);
+
+            // constructor parameters
+            constructor.Parameters.Add(new CodeParameterDeclarationExpression("SourceLineNumber", "sourceLineNumbers"));
+            constructor.Parameters.Add(new CodeParameterDeclarationExpression(typeof(int), "id"));
+            constructor.Parameters.Add(new CodeParameterDeclarationExpression(typeof(string), "resourceName"));
+            CodeParameterDeclarationExpression messageArgsParam = new CodeParameterDeclarationExpression("params object[]", "messageArgs");
+            constructor.Parameters.Add(messageArgsParam);
+
+            constructor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("sourceLineNumbers"));
+            constructor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("id"));
+            constructor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("resourceName"));
+            constructor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("messageArgs"));
+
+            // assign base.Level if messageLevel is specified
+            if (!String.IsNullOrEmpty(messageLevel))
+            {
+                CodePropertyReferenceExpression levelReference = new CodePropertyReferenceExpression(new CodeBaseReferenceExpression(), "Level");
+                CodeFieldReferenceExpression messageLevelField = new CodeFieldReferenceExpression(new CodeTypeReferenceExpression("MessageLevel"), messageLevel);
+                constructor.Statements.Add(new CodeAssignStatement(levelReference, messageLevelField));
+            }
+
+            // Assign base.ResourceManager property
+            CodePropertyReferenceExpression baseResourceManagerReference = new CodePropertyReferenceExpression(new CodeBaseReferenceExpression(), "ResourceManager");
+            CodeFieldReferenceExpression resourceManagerField = new CodeFieldReferenceExpression(null, "resourceManager");
+            constructor.Statements.Add(new CodeAssignStatement(baseResourceManagerReference, resourceManagerField));
+
+            //CodeMemberProperty resourceManagerProperty = new CodeMemberProperty();
+            //resourceManagerProperty.Attributes = MemberAttributes.Public | MemberAttributes.Override;
+            //resourceManagerProperty.Name = "ResourceManager";
+            //resourceManagerProperty.Type = new CodeTypeReference("ResourceManager");
+            //CodeFieldReferenceExpression resourceManagerReference = new CodeFieldReferenceExpression();
+            //resourceManagerReference.FieldName = "resourceManager";
+            //resourceManagerProperty.GetStatements.Add(new CodeMethodReturnStatement(resourceManagerReference));
+            //messageContainer.Members.Add(resourceManagerProperty);
+
+            return messageContainer;
+        }
+    }
+}
diff --git a/src/WixBuildTools.MsgGen/MsgGen.cs b/src/WixBuildTools.MsgGen/MsgGen.cs
new file mode 100644
index 00000000..ff4a4a90
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/MsgGen.cs
@@ -0,0 +1,261 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixBuildTools.MsgGen
+{
+    using Microsoft.CSharp;
+    using System;
+    using System.CodeDom;
+    using System.CodeDom.Compiler;
+    using System.Collections;
+    using System.IO;
+    using System.Reflection;
+    using System.Resources;
+    using System.Runtime.InteropServices;
+    using System.Xml;
+    using System.Xml.Schema;
+
+    /// <summary>
+    /// The main entry point for MsgGen.
+    /// </summary>
+    public class MsgGen
+    {
+        /// <summary>
+        /// The main entry point for MsgGen.
+        /// </summary>
+        /// <param name="args">Commandline arguments for the application.</param>
+        /// <returns>Returns the application error code.</returns>
+        [STAThread]
+        public static int Main(string[] args)
+        {
+            try
+            {
+                MsgGenMain msgGen = new MsgGenMain(args);
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("MsgGen.exe : fatal error MSGG0000: {0}\r\n\r\nStack Trace:\r\n{1}", e.Message, e.StackTrace);
+                if (e is NullReferenceException || e is SEHException)
+                {
+                    throw;
+                }
+                return 2;
+            }
+
+            return 0;
+        }
+
+        /// <summary>
+        /// Main class for MsgGen.
+        /// </summary>
+        private class MsgGenMain
+        {
+            private bool showLogo;
+            private bool showHelp;
+
+            private string sourceFile;
+            private string destClassFile;
+            private string destResourcesFile;
+
+            /// <summary>
+            /// Main method for the MsgGen application within the MsgGenMain class.
+            /// </summary>
+            /// <param name="args">Commandline arguments to the application.</param>
+            public MsgGenMain(string[] args)
+            {
+                this.showLogo = true;
+                this.showHelp = false;
+
+                this.sourceFile = null;
+                this.destClassFile = null;
+                this.destResourcesFile = null;
+
+                // parse the command line
+                this.ParseCommandLine(args);
+
+                if (null == this.sourceFile || null == this.destClassFile)
+                {
+                    this.showHelp = true;
+                }
+                if (null == this.destResourcesFile)
+                {
+                    this.destResourcesFile = Path.ChangeExtension(this.destClassFile, ".resources");
+                }
+
+                // get the assemblies
+                Assembly msgGenAssembly = Assembly.GetExecutingAssembly();
+
+                if (this.showLogo)
+                {
+                    Console.WriteLine("Microsoft (R) Message Generation Tool version {0}", msgGenAssembly.GetName().Version.ToString());
+                    Console.WriteLine("Copyright (C) Microsoft Corporation 2004. All rights reserved.");
+                    Console.WriteLine();
+                }
+                if (this.showHelp)
+                {
+                    Console.WriteLine(" usage:  MsgGen.exe [-?] [-nologo] sourceFile destClassFile [destResourcesFile]");
+                    Console.WriteLine();
+                    Console.WriteLine("   -? this help information");
+                    Console.WriteLine();
+                    Console.WriteLine("For more information see: http://wix.sourceforge.net");
+                    return;   // exit
+                }
+
+                // load the schema
+                XmlReader reader = null;
+                XmlSchemaCollection schemaCollection = null;
+                try
+                {
+                    reader = new XmlTextReader(msgGenAssembly.GetManifestResourceStream("WixBuildTools.MsgGen.Xsd.messages.xsd"));
+                    schemaCollection = new XmlSchemaCollection();
+                    schemaCollection.Add("http://schemas.microsoft.com/genmsgs/2004/07/messages", reader);
+                }
+                finally
+                {
+                    reader.Close();
+                }
+
+                // load the source file and process it
+                using (StreamReader sr = new StreamReader(this.sourceFile))
+                {
+                    XmlParserContext context = new XmlParserContext(null, null, null, XmlSpace.None);
+                    XmlValidatingReader validatingReader = new XmlValidatingReader(sr.BaseStream, XmlNodeType.Document, context);
+                    validatingReader.Schemas.Add(schemaCollection);
+
+                    XmlDocument errorsDoc = new XmlDocument();
+                    errorsDoc.Load(validatingReader);
+
+                    CodeCompileUnit codeCompileUnit = new CodeCompileUnit();
+
+                    using (ResourceWriter resourceWriter = new ResourceWriter(this.destResourcesFile))
+                    {
+                        GenerateMessageFiles.Generate(errorsDoc, codeCompileUnit, resourceWriter);
+
+                        GenerateCSharpCode(codeCompileUnit, this.destClassFile);
+                    }
+                }
+            }
+
+            /// <summary>
+            /// Generate the actual C# code.
+            /// </summary>
+            /// <param name="codeCompileUnit">The code DOM.</param>
+            /// <param name="destClassFile">Destination C# source file.</param>
+            public static void GenerateCSharpCode(CodeCompileUnit codeCompileUnit, string destClassFile)
+            {
+                // generate the code with the C# code provider
+                CSharpCodeProvider provider = new CSharpCodeProvider();
+
+                // obtain an ICodeGenerator from the CodeDomProvider class
+                ICodeGenerator gen = provider.CreateGenerator();
+
+                // create a TextWriter to a StreamWriter to the output file
+                using (StreamWriter sw = new StreamWriter(destClassFile))
+                {
+                    using (IndentedTextWriter tw = new IndentedTextWriter(sw, "    "))
+                    {
+                        CodeGeneratorOptions options = new CodeGeneratorOptions();
+
+                        // code generation options
+                        options.BlankLinesBetweenMembers = true;
+                        options.BracingStyle = "C";
+
+                        // generate source code using the code generator
+                        gen.GenerateCodeFromCompileUnit(codeCompileUnit, tw, options);
+                    }
+                }
+            }
+
+            /// <summary>
+            /// Parse the commandline arguments.
+            /// </summary>
+            /// <param name="args">Commandline arguments.</param>
+            private void ParseCommandLine(string[] args)
+            {
+                for (int i = 0; i < args.Length; ++i)
+                {
+                    string arg = args[i];
+                    if (null == arg || "" == arg)   // skip blank arguments
+                    {
+                        continue;
+                    }
+
+                    if ('-' == arg[0] || '/' == arg[0])
+                    {
+                        string parameter = arg.Substring(1);
+                        if ("nologo" == parameter)
+                        {
+                            this.showLogo = false;
+                        }
+                        else if ("?" == parameter || "help" == parameter)
+                        {
+                            this.showHelp = true;
+                        }
+                    }
+                    else if ('@' == arg[0])
+                    {
+                        using (StreamReader reader = new StreamReader(arg.Substring(1)))
+                        {
+                            string line;
+                            ArrayList newArgs = new ArrayList();
+
+                            while (null != (line = reader.ReadLine()))
+                            {
+                                string newArg = "";
+                                bool betweenQuotes = false;
+                                for (int j = 0; j < line.Length; ++j)
+                                {
+                                    // skip whitespace
+                                    if (!betweenQuotes && (' ' == line[j] || '\t' == line[j]))
+                                    {
+                                        if ("" != newArg)
+                                        {
+                                            newArgs.Add(newArg);
+                                            newArg = null;
+                                        }
+
+                                        continue;
+                                    }
+
+                                    // if we're escaping a quote
+                                    if ('\\' == line[j] && '"' == line[j])
+                                    {
+                                        ++j;
+                                    }
+                                    else if ('"' == line[j])   // if we've hit a new quote
+                                    {
+                                        betweenQuotes = !betweenQuotes;
+                                        continue;
+                                    }
+
+                                    newArg = String.Concat(newArg, line[j]);
+                                }
+                                if ("" != newArg)
+                                {
+                                    newArgs.Add(newArg);
+                                }
+                            }
+                            string[] ar = (string[])newArgs.ToArray(typeof(string));
+                            this.ParseCommandLine(ar);
+                        }
+                    }
+                    else if (null == this.sourceFile)
+                    {
+                        this.sourceFile = arg;
+                    }
+                    else if (null == this.destClassFile)
+                    {
+                        this.destClassFile = arg;
+                    }
+                    else if (null == this.destResourcesFile)
+                    {
+                        this.destResourcesFile = arg;
+                    }
+                    else
+                    {
+                        throw new ArgumentException(String.Format("Unknown argument '{0}'.", arg));
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/src/WixBuildTools.MsgGen/WixBuildTools.MsgGen.csproj b/src/WixBuildTools.MsgGen/WixBuildTools.MsgGen.csproj
new file mode 100644
index 00000000..7d7da64c
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/WixBuildTools.MsgGen.csproj
@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net461</TargetFramework>
+    <IsTool>true</IsTool>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Content Include="build\WixBuildTools.MsgGen.targets" PackagePath="build\" />
+    <Content Include="buildCrossTargeting\WixBuildTools.MsgGen.targets" PackagePath="buildCrossTargeting\" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Include="Xsd\messages.xsd" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="2.0.37-beta" PrivateAssets="all" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/WixBuildTools.MsgGen/Xsd/messages.xsd b/src/WixBuildTools.MsgGen/Xsd/messages.xsd
new file mode 100644
index 00000000..fd086502
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/Xsd/messages.xsd
@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+    targetNamespace="http://schemas.microsoft.com/genmsgs/2004/07/messages"
+              xmlns="http://schemas.microsoft.com/genmsgs/2004/07/messages">
+    <xs:annotation>
+        <xs:documentation>
+            Schema for describing any kind of messages.
+        </xs:documentation>
+    </xs:annotation>
+
+    <xs:element name="Messages">
+        <xs:complexType>
+            <xs:sequence maxOccurs="unbounded">
+                <xs:element ref="Class"/>
+            </xs:sequence>
+            <xs:attribute name="Namespace" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Namespace of the generated class.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="Resources" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Resources stream for messages. Will get namespace prepended to it.</xs:documentation></xs:annotation>
+            </xs:attribute>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:element name="Class">
+        <xs:complexType>
+            <xs:sequence minOccurs="0" maxOccurs="unbounded">
+                <xs:element ref="Message"/>
+            </xs:sequence>
+            <xs:attribute name="Name" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Name of the generated class.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="ContainerName" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Name of the generated container class.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="BaseContainerName" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Name of the base container class.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="Level" type="MessageLevelType">
+                <xs:annotation><xs:documentation>Optional message level for this container class and derivative classes.</xs:documentation></xs:annotation>
+            </xs:attribute>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:element name="Message">
+        <xs:complexType>
+            <xs:sequence maxOccurs="unbounded">
+                <xs:element ref="Instance"/>
+            </xs:sequence>
+            <xs:attribute name="Id" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Name of the message type.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="Number" type="xs:integer" use="required">
+                <xs:annotation><xs:documentation>Override the number for this message type.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="SourceLineNumbers" type="YesNoType">
+                <xs:annotation><xs:documentation>Associate SourceLineNumbers with this message.  The default value is "yes".</xs:documentation></xs:annotation>
+            </xs:attribute>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:element name="Instance">
+        <xs:complexType mixed="true">
+            <xs:sequence minOccurs="0" maxOccurs="unbounded">
+                <xs:element ref="Parameter"/>
+            </xs:sequence>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:element name="Parameter">
+        <xs:complexType>
+            <xs:attribute name="Type" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Type of the parameter.</xs:documentation></xs:annotation>
+            </xs:attribute>
+            <xs:attribute name="Name" type="xs:string" use="required">
+                <xs:annotation><xs:documentation>Name of the parameter.</xs:documentation></xs:annotation>
+            </xs:attribute>
+        </xs:complexType>
+    </xs:element>
+
+    <xs:simpleType name="YesNoType">
+        <xs:annotation><xs:documentation>Values of this type will either be "yes" or "no".</xs:documentation></xs:annotation>
+        <xs:restriction base="xs:NMTOKEN">
+            <xs:enumeration value="no"/>
+            <xs:enumeration value="yes"/>
+        </xs:restriction>
+    </xs:simpleType>
+
+    <xs:simpleType name="MessageLevelType">
+        <xs:annotation><xs:documentation>The message level for this message which corresponds to the WixToolset.MessageLevel enumeration.</xs:documentation></xs:annotation>
+        <xs:restriction base="xs:NMTOKEN">
+            <xs:enumeration value="Verbose"/>
+            <xs:enumeration value="Information"/>
+            <xs:enumeration value="Warning"/>
+            <xs:enumeration value="Error"/>
+        </xs:restriction>
+    </xs:simpleType>
+</xs:schema>
diff --git a/src/WixBuildTools.MsgGen/build/WixBuildTools.MsgGen.targets b/src/WixBuildTools.MsgGen/build/WixBuildTools.MsgGen.targets
new file mode 100644
index 00000000..dfa7bcbe
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/build/WixBuildTools.MsgGen.targets
@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <!--Provide support for setting type (BuildAction) from VS-->
+    <AvailableItemName Include="MsgGenSource" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <MsgGenPath Condition=" '$(MsgGenPath)'=='' ">$(MSBuildThisFileDirectory)..\tools\</MsgGenPath>
+  </PropertyGroup>
+
+  <!--
+  ================================================================================================
+  MsgGen
+
+    Generates a .cs class file and a .resx file from an XML file.
+
+    [IN]
+    @(MsgGenSource) - The items to run through the MsgGen tool.
+
+    [OUT]
+    $(IntermediateOutputPath)%(Filename).cs - The generated .cs files to include in the compilation.
+    $(IntermediateOutputPath)%(MsgGenSource.ResourcesLogicalName) - The generated .resources file to embed in the assembly.
+  ================================================================================================
+  -->
+  <PropertyGroup>
+    <MsgGenDependsOn>
+      PrepareMsgGen
+    </MsgGenDependsOn>
+    <PrepareResourcesDependsOn>
+      MsgGen;
+      $(PrepareResourcesDependsOn)
+    </PrepareResourcesDependsOn>
+  </PropertyGroup>
+  <Target
+    Name="MsgGen"
+    BeforeTargets="PrepareResources"
+    DependsOnTargets="$(MsgGenDependsOn)"
+    Condition=" '@(MsgGenSource)' != '' "
+    Inputs="@(MsgGenSource)"
+    Outputs="$(IntermediateOutputPath)%(MsgGenSource.Filename).cs;
+             $(IntermediateOutputPath)%(MsgGenSource.ResourcesLogicalName)">
+
+    <Exec Command="&quot;$(MsgGenPath)WixBuildTools.MsgGen.exe&quot; -nologo &quot;%(MsgGenSource.FullPath)&quot; &quot;$(MsgGenCsFile)&quot; &quot;$(MsgGenResourcesFile)&quot;"
+          Outputs="$(MsgGenCsFile);$(MsgGenResourcesFile)" />
+
+    <ItemGroup>
+      <!-- This will tell MSBuild to clean up the .cs and .resources file during a Clean build -->
+      <FileWrites Include="$(MsgGenCsFile);$(MsgGenResourcesFile)" />
+    </ItemGroup>
+  </Target>
+
+  <!--
+  ================================================================================================
+  PrepareMsgGen
+
+    Creates properties and Include items for MsgGen. This must be separate from the MsgGen target
+    to workaround an MSBuild bug: AdditionalMetadata is ignored when the target is up-to-date.
+
+  ================================================================================================
+  -->
+  <Target
+    Name="PrepareMsgGen"
+    Condition=" '@(MsgGenSource)' != '' ">
+
+    <CreateProperty Value="$(IntermediateOutputPath)%(MsgGenSource.Filename).cs">
+      <Output TaskParameter="Value" PropertyName="MsgGenCsFile" />
+    </CreateProperty>
+
+    <CreateProperty
+      Value="$(IntermediateOutputPath)%(MsgGenSource.ResourcesLogicalName)"
+      Condition=" '%(MsgGenSource.ResourcesLogicalName)' != '' ">
+
+      <Output TaskParameter="Value" PropertyName="MsgGenResourcesFile" />
+    </CreateProperty>
+
+    <!-- Add the generated .cs file to the list of source files to compile -->
+    <CreateItem
+      Include="$(MsgGenCsFile)"
+      AdditionalMetadata="Link=%(MsgGenCsFile.Filename)%(MsgGenCsFile.Extension)">
+
+      <Output TaskParameter="Include" ItemName="Compile" />
+    </CreateItem>
+
+    <!-- Add the generated .resources file to the list of resources to embed -->
+    <CreateItem
+      Include="$(MsgGenResourcesFile)"
+      AdditionalMetadata="Link=%(MsgGenResourcesFile.Filename)%(MsgGenResourcesFile.Extension);
+                          LogicalName=%(MsgGenSource.ResourcesLogicalName)"
+      Condition=" '$(MsgGenResourcesFile)' != '' ">
+
+      <Output TaskParameter="Include" ItemName="EmbeddedResource" />
+    </CreateItem>
+  </Target>
+
+</Project>
diff --git a/src/WixBuildTools.MsgGen/buildCrossTargeting/WixBuildTools.MsgGen.targets b/src/WixBuildTools.MsgGen/buildCrossTargeting/WixBuildTools.MsgGen.targets
new file mode 100644
index 00000000..a3985af5
--- /dev/null
+++ b/src/WixBuildTools.MsgGen/buildCrossTargeting/WixBuildTools.MsgGen.targets
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
+  <Import Project="..\build\WixBuildTools.MsgGen.targets" />
+</Project>