Quick tool to help convert messages.xml to .cs

src/MessagesToMessages/MessagesToMessages.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>

src/MessagesToMessages/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Xml.Linq;
+
+namespace MessagesToMessages
+{
+    class Program
+    {
+        static readonly XNamespace ns = "http://schemas.microsoft.com/genmsgs/2004/07/messages";
+        static readonly XName ClassDefinition = ns + "Class";
+        static readonly XName MessageDefinition = ns + "Message";
+        static readonly XName InstanceDefinition = ns + "Instance";
+        static readonly XName ParameterDefinition = ns + "Parameter";
+        static readonly XName Id = "Id";
+        static readonly XName Level = "Level";
+        static readonly XName Number = "Number";
+        static readonly XName SourceLineNumbers = "SourceLineNumbers";
+        static readonly XName Type = "Type";
+        static readonly XName Name = "Name";
+
+        static void Main(string[] args)
+        {
+            if (args.Length == 0)
+            {
+                return;
+            }
+            else if (args.Length < 2)
+            {
+                Console.WriteLine("Need to specify output folder as well.");
+            }
+            else if (!Directory.Exists(args[1]))
+            {
+                Console.WriteLine("Output folder does not exist: {0}", args[1]);
+            }
+
+            var messages = ReadXml(Path.GetFullPath(args[0]));
+
+            foreach (var m in messages.GroupBy(m => m.Level))
+            {
+                var result = GenerateCs(m.Key, m);
+
+                var path = Path.Combine(args[1], m.Key + "Messages.cs");
+                File.WriteAllText(path, result);
+            }
+        }
+
+        private static IEnumerable<Message> ReadXml(string inputPath)
+        {
+            var doc = XDocument.Load(inputPath);
+
+            foreach (var xClass in doc.Root.Descendants(ClassDefinition))
+            {
+                var level = xClass.Attribute(Level).Value;
+
+                var unique = new HashSet<string>();
+                var lastNumber = 0;
+                foreach (var xMessage in xClass.Elements(MessageDefinition))
+                {
+                    var id = xMessage.Attribute(Id).Value;
+
+                    if (!unique.Add(id))
+                    {
+                        Console.WriteLine("Duplicated message: {0}", id);
+                    }
+
+                    if (!Int32.TryParse(xMessage.Attribute(Number)?.Value, out var number))
+                    {
+                        number = lastNumber;
+                    }
+                    lastNumber = number + 1;
+
+                    var sln = xMessage.Attribute(SourceLineNumbers)?.Value != "no";
+
+                    var suffix = 0;
+                    foreach (var xInstance in xMessage.Elements(InstanceDefinition))
+                    {
+                        var value = xInstance.Value.Trim();
+
+                        var parameters = xInstance.Elements(ParameterDefinition).Select(ReadParameter).ToList();
+
+                        yield return new Message { Id = id, Level = level, Number = number, Parameters = parameters, SourceLineNumbers = sln, Value = value, Suffix = suffix == 0 ? String.Empty : suffix.ToString() };
+
+                        ++suffix;
+                    }
+                }
+            }
+        }
+
+        private static Parameter ReadParameter(XElement element)
+        {
+            var name = element.Attribute(Name)?.Value;
+            var type = element.Attribute(Type)?.Value ?? "string";
+
+            if (type.StartsWith("System."))
+            {
+                type = type.Substring(7);
+            }
+
+            switch (type)
+            {
+                case "String":
+                    type = "string";
+                    break;
+
+                case "Int32":
+                    type = "int";
+                    break;
+
+                case "Int64":
+                    type = "long";
+                    break;
+            }
+
+            return new Parameter { Name = name, Type = type };
+        }
+
+        private static string GenerateCs(string level, IEnumerable<Message> messages)
+        {
+            var header = String.Join(Environment.NewLine,
+                "// 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 WixToolset.Data",
+                "{",
+                "    using System;",
+                "    using System.Resources;",
+                "",
+                "    public static class {0}Messages",
+                "    {");
+
+            var messageFormat = String.Join(Environment.NewLine,
+                "        public static Message {0}({1})",
+                "        {{",
+                "            return Message({4}, Ids.{0}, \"{3}\"{2});",
+                "        }}",
+                "");
+
+
+            var endMessagesFormat = String.Join(Environment.NewLine,
+                "        private static Message Message(SourceLineNumber sourceLineNumber, Ids id, string format, params object[] args)",
+                "        {{",
+                "            return new Message(sourceLineNumber, MessageLevel.{0}, (int)id, format, args);",
+                "        }}",
+                "",
+                "        private static Message Message(SourceLineNumber sourceLineNumber, Ids id, ResourceManager resourceManager, string resourceName, params object[] args)",
+                "        {{",
+                "            return new Message(sourceLineNumber, MessageLevel.{0}, (int)id, resourceManager, resourceName, args);",
+                "        }}",
+                "",
+                "        public enum Ids",
+                "        {{");
+
+            var idEnumFormat =
+                "            {0} = {1},";
+            var footer = String.Join(Environment.NewLine,
+                "        }",
+                "    }",
+                "}",
+                "");
+
+            var sb = new StringBuilder();
+
+            sb.AppendLine(header.Replace("{0}", level));
+
+            foreach (var message in messages.OrderBy(m => m.Id))
+            {
+                var paramsWithTypes = String.Join(", ", message.Parameters.Select(p => $"{p.Type} {p.Name}"));
+                var paramsWithoutTypes = String.Join(", ", message.Parameters.Select(p => p.Name));
+
+                if (message.SourceLineNumbers)
+                {
+                    paramsWithTypes = String.IsNullOrEmpty(paramsWithTypes)
+                        ? "SourceLineNumber sourceLineNumbers"
+                        : "SourceLineNumber sourceLineNumbers, " + paramsWithTypes;
+                }
+
+                if (!String.IsNullOrEmpty(paramsWithoutTypes))
+                {
+                    paramsWithoutTypes = ", " + paramsWithoutTypes;
+                }
+
+                sb.AppendFormat(messageFormat, message.Id, paramsWithTypes, paramsWithoutTypes, ToCSharpString(message.Value), message.SourceLineNumbers ? "sourceLineNumbers" : "null");
+
+                sb.AppendLine();
+            }
+
+            sb.AppendFormat(endMessagesFormat, level);
+            sb.AppendLine();
+
+            var unique = new HashSet<int>();
+            foreach (var message in messages.OrderBy(m => m.Number))
+            {
+                if (unique.Add(message.Number))
+                {
+                    sb.AppendFormat(idEnumFormat, message.Id, message.Number);
+                    sb.AppendLine();
+                }
+            }
+
+            sb.Append(footer);
+
+            return sb.ToString();
+        }
+
+        private static string ToCSharpString(string value)
+        {
+            return value.Replace("\\", "\\\\").Replace("\"", "\\\"").Replace("\r", "\\r").Replace("\n", "\\n").Replace("\t", "\\t");
+        }
+
+        private class Message
+        {
+            public string Id { get; set; }
+
+            public string Suffix { get; set; }
+
+            public string Level { get; set; }
+
+            public int Number { get; set; }
+
+            public bool SourceLineNumbers { get; set; }
+
+            public string Value { get; set; }
+
+            public IEnumerable<Parameter> Parameters { get; set; }
+        }
+
+
+        private class Parameter
+        {
+            public string Name { get; set; }
+
+            public string Type { get; set; }
+        }
+    }
+}

src/MessagesToMessages/Properties/launchSettings.json

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+{
+  "profiles": {
+    "TablesAndTuples": {
+      "commandName": "Project",
+      "commandLineArgs": "E:\\src\\wixtoolset\\Core\\src\\WixToolset.Core\\Data\\messages.xml E:\\src\\wixtoolset\\Data\\src\\WixToolset.Data",
+      "workingDirectory": "E:\\src\\wixtoolset\\Core\\src\\WixToolset.Core\\"
+    }
+  }
+}