Re-introduce "decompile" to backend

1 files changed, 75 insertions, 0 deletions

diff --git a/src/WixToolset.Core.WindowsInstaller/Decompile/DecompileMsiOrMsmCommand.cs b/src/WixToolset.Core.WindowsInstaller/Decompile/DecompileMsiOrMsmCommand.cs
new file mode 100644
index 00000000..130f5ea8
--- /dev/null
+++ b/src/WixToolset.Core.WindowsInstaller/Decompile/DecompileMsiOrMsmCommand.cs
@@ -0,0 +1,75 @@
+// 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.Core.WindowsInstaller.Unbind
+{
+    using System;
+    using System.Collections.Generic;
+    using System.ComponentModel;
+    using System.Xml.Linq;
+    using WixToolset.Core.Native;
+    using WixToolset.Data;
+    using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Data;
+    using WixToolset.Extensibility.Services;
+    using WixToolset.Msi;
+
+    internal class DecompileMsiOrMsmCommand
+    {
+        public DecompileMsiOrMsmCommand(IDecompileContext context, IEnumerable<IWindowsInstallerBackendDecompilerExtension> backendExtensions)
+        {
+            this.Context = context;
+            this.Extensions = backendExtensions;
+            this.Messaging = context.ServiceProvider.GetService<IMessaging>();
+        }
+
+        private IDecompileContext Context { get; }
+
+        private IEnumerable<IWindowsInstallerBackendDecompilerExtension> Extensions { get; }
+
+        private IMessaging Messaging { get; }
+
+        public DecompileResult Execute()
+        {
+            var result = new DecompileResult();
+
+            try
+            {
+                using (var database = new Database(this.Context.DecompilePath, OpenDatabase.ReadOnly))
+                {
+                    var unbindCommand = new UnbindDatabaseCommand(this.Messaging, database, this.Context.DecompilePath, this.Context.DecompileType, this.Context.ExtractFolder, this.Context.IntermediateFolder, this.Context.IsAdminImage, false, skipSummaryInfo: false);
+                    var output = unbindCommand.Execute();
+
+                    var decompiler = new Decompiler(this.Messaging, this.Extensions, this.Context.BaseSourcePath, this.Context.SuppressCustomTables, this.Context.SuppressDroppingEmptyTables, this.Context.SuppressUI, this.Context.TreatProductAsModule);
+                    var wxs = decompiler.Decompile(output);
+
+                    wxs.Save(this.Context.OutputPath, SaveOptions.OmitDuplicateNamespaces);
+                    result.SourceDocumentPath = this.Context.OutputPath;
+
+                    // extract the files from the cabinets
+                    if (!String.IsNullOrEmpty(this.Context.ExtractFolder) && !this.Context.SuppressExtractCabinets)
+                    {
+                        var extractCommand = new ExtractCabinetsCommand(output, database, this.Context.DecompilePath, this.Context.ExtractFolder, this.Context.IntermediateFolder);
+                        extractCommand.Execute();
+
+                        result.ExtractedFilePaths = extractCommand.ExtractedFiles;
+                    }
+                    else
+                    {
+                        result.ExtractedFilePaths = new string[0];
+                    }
+                }
+            }
+            catch (Win32Exception e)
+            {
+                if (0x6E == e.NativeErrorCode) // ERROR_OPEN_FAILED
+                {
+                    throw new WixException(ErrorMessages.OpenDatabaseFailed(this.Context.DecompilePath));
+                }
+
+                throw;
+            }
+
+            return result;
+        }
+    }
+}