#1284: Add new option "Show IL code" to ICSharpCode.Decompiler.Console

ICSharpCode.Decompiler.Console/Program.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -6,6 +6,9 @@ using McMaster.Extensions.CommandLineUtils;
 using ICSharpCode.Decompiler.CSharp;
 using ICSharpCode.Decompiler.TypeSystem;
 using ICSharpCode.Decompiler.Metadata;
+using ICSharpCode.Decompiler.Disassembler;
+using System.Threading;
+using System.Reflection.Metadata;
 
 namespace ICSharpCode.Decompiler.Console
 {
@@ -24,6 +27,7 @@ namespace ICSharpCode.Decompiler.Console
 			var outputOption = app.Option("-o|--outputdir <directory>", "The output directory, if omitted decompiler output is written to standard out.", CommandOptionType.SingleValue);
 			var typeOption = app.Option("-t|--type <type-name>", "The fully qualified name of the type to decompile.", CommandOptionType.SingleValue);
 			var listOption = app.Option("-l|--list <entity-type(s)>", "Lists all entities of the specified type(s). Valid types: c(lass), i(interface), s(truct), d(elegate), e(num)", CommandOptionType.MultipleValue);
+			var ilViewerOption = app.Option("-il|--ilcode", "Show IL code.", CommandOptionType.NoValue);
 			app.ExtendedHelpText = Environment.NewLine + "-o is valid with every option and required when using -p.";
 
 			app.ThrowOnUnexpectedArgument = false; // Ignore invalid arguments / options
@@ -60,6 +64,14 @@ namespace ICSharpCode.Decompiler.Console
 						output = File.CreateText(Path.Combine(directory, outputName) + ".list.txt");
 					}
 					ListContent(inputAssemblyFileName.Value, output, kinds);
+				} else if (ilViewerOption.HasValue()) {
+					TextWriter output = System.Console.Out;
+					if (outputOption.HasValue()) {
+						string directory = outputOption.Value();
+						string outputName = Path.GetFileNameWithoutExtension(inputAssemblyFileName.Value);
+						output = File.CreateText(Path.Combine(directory, outputName) + ".ILCode.txt");
+					}
+					ShowIL(inputAssemblyFileName.Value, output);
 				} else {
 					TextWriter output = System.Console.Out;
 					if (outputOption.HasValue()) {
@@ -91,6 +103,21 @@ namespace ICSharpCode.Decompiler.Console
 			}
 		}
 
+		static void ShowIL(string assemblyFileName, TextWriter output)
+		{
+			CSharpDecompiler decompiler = GetDecompiler(assemblyFileName);
+			ITextOutput textOutput = new PlainTextOutput();
+			ReflectionDisassembler disassembler = new ReflectionDisassembler(textOutput, CancellationToken.None);
+
+			disassembler.DisassembleNamespace(decompiler.TypeSystem.MainModule.RootNamespace.Name,
+				decompiler.TypeSystem.MainModule.PEFile,
+				decompiler.TypeSystem.MainModule.TypeDefinitions.Select(x => (TypeDefinitionHandle)x.MetadataToken));
+
+			output.WriteLine($"IL code: {decompiler.TypeSystem.MainModule.AssemblyName}");
+			output.WriteLine(textOutput.ToString());
+			output.Flush();
+		}
+
 		static void DecompileAsProject(string assemblyFileName, string outputDirectory)
 		{
 			WholeProjectDecompiler decompiler = new WholeProjectDecompiler();