Add `customize` command

src/WinSW.Core/Native/ResourceApis.cs

@@ -0,0 +1,38 @@
+#pragma warning disable SA1310 // Field names should not contain underscore
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace WinSW.Native
+{
+    internal static class ResourceApis
+    {
+        internal static readonly IntPtr VS_VERSION_INFO = new IntPtr(1);
+
+        internal static readonly IntPtr RT_VERSION = new IntPtr(16);
+
+        [DllImport(Libraries.Kernel32, SetLastError = true, CharSet = CharSet.Unicode)]
+        internal static extern IntPtr BeginUpdateResourceW(string fileName, bool deleteExistingResources);
+
+        [DllImport(Libraries.Kernel32, SetLastError = true)]
+        internal static extern bool EndUpdateResourceW(IntPtr update, bool discard);
+
+        [DllImport(Libraries.Kernel32, SetLastError = true)]
+        internal static extern IntPtr FindResourceW(IntPtr module, IntPtr name, IntPtr type);
+
+        [DllImport(Libraries.Kernel32)]
+        internal static extern bool FreeLibrary(IntPtr libModule);
+
+        [DllImport(Libraries.Kernel32, CharSet = CharSet.Unicode)]
+        internal static extern IntPtr LoadLibraryW(string libFileName);
+
+        [DllImport(Libraries.Kernel32, SetLastError = true)]
+        internal static extern IntPtr LoadResource(IntPtr module, IntPtr resInfo);
+
+        [DllImport(Libraries.Kernel32)]
+        internal static extern IntPtr LockResource(IntPtr resData);
+
+        [DllImport(Libraries.Kernel32, SetLastError = true)]
+        internal static extern bool UpdateResourceW(IntPtr update, IntPtr type, IntPtr name, ushort language, IntPtr data, int size);
+    }
+}

src/WinSW.Core/Native/Resources.cs

@@ -0,0 +1,170 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Runtime.InteropServices;
+using static WinSW.Native.ResourceApis;
+
+namespace WinSW.Native
+{
+    internal static class Resources
+    {
+        /// <exception cref="CommandException" />
+        internal static unsafe bool UpdateCompanyName(string path, string outputPath, string companyName)
+        {
+            IntPtr module = LoadLibraryW(path);
+            try
+            {
+                IntPtr verInfo = FindResourceW(module, VS_VERSION_INFO, RT_VERSION);
+                if (verInfo == IntPtr.Zero)
+                {
+                    Exit();
+                }
+
+                IntPtr resData = LoadResource(module, verInfo);
+                if (resData == IntPtr.Zero)
+                {
+                    Exit();
+                }
+
+                IntPtr resAddr = LockResource(resData);
+
+                IntPtr address = resAddr;
+                int offset = 0;
+
+                short length = ((short*)address)[0];
+                short valueLength = ReadHeaderAndAdvance();
+                string key = ReadKeyAndAdvance();
+                Debug.Assert(key == "VS_VERSION_INFO");
+                offset += valueLength;
+                Align();
+
+                valueLength = ReadHeaderAndAdvance();
+                key = ReadKeyAndAdvance();
+                Debug.Assert(key == "VarFileInfo");
+                offset += valueLength;
+                Align();
+
+                valueLength = ReadHeaderAndAdvance();
+                key = ReadKeyAndAdvance();
+                Debug.Assert(key == "Translation");
+                ushort language = ((ushort*)address)[0];
+                ushort codePage = ((ushort*)address)[1];
+                offset += valueLength;
+                address = resAddr + offset;
+
+                valueLength = ReadHeaderAndAdvance();
+                key = ReadKeyAndAdvance();
+                Debug.Assert(key == "StringFileInfo");
+                offset += valueLength;
+                Align();
+
+                short stringTableLength = ((short*)address)[0];
+                int stringTableEndOffset = offset + stringTableLength;
+                valueLength = ReadHeaderAndAdvance();
+                key = ReadKeyAndAdvance();
+                Debug.Assert(key == $"{language:x4}{codePage:x4}");
+
+                do
+                {
+                    int valueLengthOffset = offset + sizeof(short);
+                    valueLength = ReadHeaderAndAdvance();
+                    key = ReadKeyAndAdvance();
+
+                    if (key != "CompanyName")
+                    {
+                        offset += sizeof(short) * valueLength;
+                        Align(); // ?
+                        continue;
+                    }
+
+                    // int oldLength = "CloudBees, Inc.".Length + 1; // 16
+                    int newLength = companyName.Length + 1;
+                    Debug.Assert(newLength > 12 && newLength <= 16);
+
+                    IntPtr newAddress = Marshal.AllocHGlobal(length);
+                    try
+                    {
+                        Buffer.MemoryCopy((void*)resAddr, (void*)newAddress, length, length);
+
+                        *(short*)(newAddress + valueLengthOffset) = (short)newLength;
+                        fixed (char* ptr = companyName)
+                        {
+                            Buffer.MemoryCopy(ptr, (void*)(newAddress + offset), newLength * sizeof(char), newLength * sizeof(char));
+                        }
+
+                        File.Copy(path, outputPath, true);
+
+                        IntPtr update = BeginUpdateResourceW(outputPath, false);
+                        if (update == IntPtr.Zero)
+                        {
+                            Exit();
+                        }
+
+                        try
+                        {
+                            if (!UpdateResourceW(update, RT_VERSION, VS_VERSION_INFO, language, newAddress, length))
+                            {
+                                Exit();
+                            }
+
+                            if (!EndUpdateResourceW(update, false))
+                            {
+                                Exit();
+                            }
+
+                            return true;
+                        }
+                        catch
+                        {
+                            _ = EndUpdateResourceW(update, true);
+                            throw;
+                        }
+                    }
+                    finally
+                    {
+                        Marshal.FreeHGlobal(newAddress);
+                    }
+                }
+                while (offset < stringTableEndOffset);
+
+                return false;
+
+                static void Exit()
+                {
+                    Throw.Command.Win32Exception();
+                }
+
+                void Align()
+                {
+                    if ((offset & 3) != 0)
+                    {
+                        offset &= ~3;
+                        offset += 4;
+                    }
+
+                    address = resAddr + offset;
+                }
+
+                short ReadHeaderAndAdvance()
+                {
+                    valueLength = ((short*)address)[1];
+                    offset += sizeof(short) * 3;
+                    address = resAddr + offset;
+                    return valueLength;
+                }
+
+                string ReadKeyAndAdvance()
+                {
+                    string key = Marshal.PtrToStringUni(address)!;
+                    offset += sizeof(char) * (key.Length + 1);
+                    Align();
+                    return key;
+                }
+            }
+            finally
+            {
+                _ = FreeLibrary(module);
+            }
+        }
+    }
+}

src/WinSW.Core/Native/Throw.cs

@@ -59,6 +59,15 @@ namespace WinSW.Native
             /// <exception cref="CommandException" />
             [DoesNotReturn]
             [MethodImpl(MethodImplOptions.NoInlining)]
+            internal static void Win32Exception()
+            {
+                Win32Exception inner = new Win32Exception();
+                Debug.Assert(inner.NativeErrorCode != 0);
+                throw new CommandException(inner);
+            }
+
+            /// <exception cref="CommandException" />
+            [MethodImpl(MethodImplOptions.NoInlining)]
             internal static void Win32Exception(string message)
             {
                 Win32Exception inner = new Win32Exception();

src/WinSW.Tests/Configuration/ExamplesTest.cs

@@ -36,17 +36,7 @@ namespace WinSW.Tests.Configuration
 
         private static XmlServiceConfig Load(string exampleName)
         {
-            string directory = Environment.CurrentDirectory;
-            while (true)
-            {
-                if (File.Exists(Path.Combine(directory, ".gitignore")))
-                {
-                    break;
-                }
-
-                directory = Path.GetDirectoryName(directory);
-                Assert.NotNull(directory);
-            }
+            string directory = Layout.RepositoryRoot;
 
             string path = Path.Combine(directory, $@"samples\sample-{exampleName}.xml");
             Assert.True(File.Exists(path));

src/WinSW.Tests/MainTest.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Diagnostics;
+using System.IO;
 using System.ServiceProcess;
 using WinSW.Tests.Util;
 using Xunit;
@@ -47,5 +49,35 @@ namespace WinSW.Tests
             string cliOut = CommandLineTestHelper.Test(new[] { "status" });
             Assert.Equal("NonExistent" + Environment.NewLine, cliOut);
         }
+
+#if NET461
+        [Fact]
+        public void Customize()
+        {
+            const string OldCompanyName = "CloudBees, Inc.";
+            const string NewCompanyName = "CLOUDBEES, INC.";
+
+            string inputPath = Path.Combine(Layout.ArtifactsDirectory, "WinSW.NET461.exe");
+
+            Assert.Equal(OldCompanyName, FileVersionInfo.GetVersionInfo(inputPath).CompanyName);
+
+            // deny write access
+            using FileStream file = File.OpenRead(inputPath);
+
+            string outputPath = Path.GetTempFileName();
+            Program.TestExecutablePath = inputPath;
+            try
+            {
+                _ = CommandLineTestHelper.Test(new[] { "customize", "-o", outputPath, "--manufacturer", NewCompanyName });
+
+                Assert.Equal(NewCompanyName, FileVersionInfo.GetVersionInfo(outputPath).CompanyName);
+            }
+            finally
+            {
+                Program.TestExecutablePath = null;
+                File.Delete(outputPath);
+            }
+        }
+#endif
     }
 }

src/WinSW.Tests/Util/Layout.cs

@@ -0,0 +1,39 @@
+using System;
+using System.IO;
+using Xunit;
+
+namespace WinSW.Tests.Util
+{
+    internal static class Layout
+    {
+        private static string repositoryRoot;
+        private static string artifactsDirectory;
+
+        internal static string RepositoryRoot
+        {
+            get
+            {
+                if (repositoryRoot != null)
+                {
+                    return repositoryRoot;
+                }
+
+                string directory = Environment.CurrentDirectory;
+                while (true)
+                {
+                    if (File.Exists(Path.Combine(directory, ".gitignore")))
+                    {
+                        break;
+                    }
+
+                    directory = Path.GetDirectoryName(directory);
+                    Assert.NotNull(directory);
+                }
+
+                return repositoryRoot = directory;
+            }
+        }
+
+        internal static string ArtifactsDirectory => artifactsDirectory ??= Path.Combine(RepositoryRoot, "artifacts");
+    }
+}

src/WinSW/Program.cs

@@ -34,6 +34,21 @@ namespace WinSW
         private static readonly ILog Log = LogManager.GetLogger(typeof(Program));
 
         internal static Action<Exception, InvocationContext>? TestExceptionHandler;
+        internal static string? TestExecutablePath;
+
+        private static string ExecutablePath
+        {
+            get
+            {
+                if (TestExecutablePath != null)
+                {
+                    return TestExecutablePath;
+                }
+
+                using Process current = Process.GetCurrentProcess();
+                return current.MainModule.FileName;
+            }
+        }
 
         internal static int Main(string[] args)
         {
@@ -205,12 +220,12 @@ namespace WinSW
                 test.Add(config);
                 test.Add(noElevate);
 
-                const int minTimeout = -1;
-                const int maxTimeout = int.MaxValue / 1000;
-
                 var timeout = new Option<int>("--timeout", "Specifies the number of seconds to wait before the service is stopped.");
                 timeout.Argument.AddValidator(argument =>
                 {
+                    const int minTimeout = -1;
+                    const int maxTimeout = int.MaxValue / 1000;
+
                     string token = argument.Tokens.Single().Value;
                     return !int.TryParse(token, out int value) ? null :
                         value < minTimeout ? $"Argument '{token}' must be greater than or equal to {minTimeout}." :
@@ -236,6 +251,39 @@ namespace WinSW
                 root.Add(refresh);
             }
 
+            {
+                var customize = new Command("customize")
+                {
+                    Handler = CommandHandler.Create<string, string>(Customize),
+                };
+
+                customize.Add(new Option<string>(new[] { "--output", "-o" })
+                {
+                    Required = true,
+                });
+
+                var manufacturer = new Option<string>("--manufacturer")
+                {
+                    Required = true,
+                };
+                manufacturer.Argument.AddValidator(argument =>
+                {
+                    const int minLength = 12;
+                    const int maxLength = 15;
+
+                    string token = argument.Tokens.Single().Value;
+                    int length = token.Length;
+                    return
+                        length < minLength ? $"The length of argument '{token}' must be greater than or equal to {minLength}." :
+                        length > maxLength ? $"The length of argument '{token}' must be less than or equal to {maxLength}." :
+                        null;
+                });
+
+                customize.Add(manufacturer);
+
+                root.Add(customize);
+            }
+
             {
                 var dev = new Command("dev", "Experimental commands.")
                 {
@@ -878,6 +926,18 @@ namespace WinSW
                 }
             }
 
+            static void Customize(string output, string manufacturer)
+            {
+                if (Resources.UpdateCompanyName(ExecutablePath, output, manufacturer))
+                {
+                    Console.WriteLine("The operation succeeded.");
+                }
+                else
+                {
+                    Console.Error.WriteLine("The operation failed.");
+                }
+            }
+
             // [DoesNotReturn]
             static void Elevate(bool noElevate)
             {