Latest version check added (disabled). (Temp) Fixed DirectoryExists for ReferencePaths (see https://github.com/natemcmaster/CommandLineUtils/issues/536)

ICSharpCode.ILSpyCmd/DotNetToolUpdateChecker.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Linq;
+using System.Reflection;
+using System.Threading;
+using System.Threading.Tasks;
+
+using NuGet.Common;
+using NuGet.Protocol;
+using NuGet.Protocol.Core.Types;
+using NuGet.Versioning;
+
+namespace ICSharpCode.ILSpyCmd
+{
+	// Idea from https://github.com/ErikEJ/EFCorePowerTools/blob/master/src/GUI/efcpt/Services/PackageService.cs
+	internal static class DotNetToolUpdateChecker
+	{
+		static NuGetVersion CurrentPackageVersion()
+		{
+			return new NuGetVersion(Assembly.GetEntryAssembly()!.GetCustomAttribute<AssemblyInformationalVersionAttribute>()!
+				.InformationalVersion);
+		}
+
+		public static async Task CheckForPackageUpdateAsync(string packageId)
+		{
+			try
+			{
+				using var cache = new SourceCacheContext();
+				var repository = Repository.Factory.GetCoreV3("https://api.nuget.org/v3/index.json");
+				var resource = await repository.GetResourceAsync<FindPackageByIdResource>().ConfigureAwait(false);
+
+				var versions = await resource.GetAllVersionsAsync(
+					packageId,
+					cache,
+					new NullLogger(),
+					CancellationToken.None).ConfigureAwait(false);
+
+				var latestVersion = versions.Where(v => v.Release == "").MaxBy(v => v);
+				if (latestVersion > CurrentPackageVersion())
+				{
+					Console.WriteLine("You are not using the latest version of the tool, please update.");
+					Console.WriteLine($"Latest version is '{latestVersion}'");
+				}
+			}
+#pragma warning disable RCS1075 // Avoid empty catch clause that catches System.Exception.
+			catch (Exception)
+			{
+			}
+#pragma warning restore RCS1075 // Avoid empty catch clause that catches System.Exception.
+		}
+	}
+}

ICSharpCode.ILSpyCmd/ICSharpCode.ILSpyCmd.csproj

@@ -51,6 +51,7 @@
   <ItemGroup>
     <PackageReference Include=" McMaster.Extensions.Hosting.CommandLine" Version="4.0.2" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
+    <PackageReference Include="NuGet.Protocol" Version="6.6.1" />
   </ItemGroup>
 
   <Target Name="ILSpyUpdateAssemblyInfo" AfterTargets="ResolveProjectReferences">

ICSharpCode.ILSpyCmd/IlspyCmdProgram.cs

@@ -51,6 +51,8 @@ Examples:
 		MemberName = nameof(DecompilerVersion))]
 	class ILSpyCmdProgram
 	{
+		// https://natemcmaster.github.io/CommandLineUtils/docs/advanced/generic-host.html
+		// https://github.com/natemcmaster/CommandLineUtils/blob/main/docs/samples/dependency-injection/generic-host/Program.cs
 		public static Task<int> Main(string[] args) => new HostBuilder().RunCommandLineApplicationAsync<ILSpyCmdProgram>(args);
 
 		[FilesExist]
@@ -95,7 +97,7 @@ Examples:
 
 		[DirectoryExists]
 		[Option("-r|--referencepath <path>", "Path to a directory containing dependencies of the assembly that is being decompiled.", CommandOptionType.MultipleValue)]
-		public string[] ReferencePaths { get; } = new string[0];
+		public string[] ReferencePaths { get; }
 
 		[Option("--no-dead-code", "Remove dead code.", CommandOptionType.NoValue)]
 		public bool RemoveDeadCode { get; }
@@ -103,7 +105,7 @@ Examples:
 		[Option("--no-dead-stores", "Remove dead stores.", CommandOptionType.NoValue)]
 		public bool RemoveDeadStores { get; }
 
-		[Option("-d|--dump-package", "Dump package assembiles into a folder. This requires the output directory option.", CommandOptionType.NoValue)]
+		[Option("-d|--dump-package", "Dump package assemblies into a folder. This requires the output directory option.", CommandOptionType.NoValue)]
 		public bool DumpPackageFlag { get; }
 
 		[Option("--nested-directories", "Use nested directories for namespaces.", CommandOptionType.NoValue)]
@@ -117,6 +119,8 @@ Examples:
 
 		private Task<int> OnExecuteAsync(CommandLineApplication app)
 		{
+			// await DotNetToolUpdateChecker.CheckForPackageUpdateAsync("ilspycmd");
+
 			TextWriter output = System.Console.Out;
 			string outputDirectory = ResolveOutputDirectory(OutputDirectory);
 
@@ -249,7 +253,7 @@ Examples:
 		{
 			var module = new PEFile(assemblyFileName);
 			var resolver = new UniversalAssemblyResolver(assemblyFileName, false, module.Metadata.DetectTargetFrameworkId());
-			foreach (var path in ReferencePaths)
+			foreach (var path in (ReferencePaths ?? Array.Empty<string>()))
 			{
 				resolver.AddSearchDirectory(path);
 			}
@@ -287,7 +291,7 @@ Examples:
 		{
 			var module = new PEFile(assemblyFileName);
 			var resolver = new UniversalAssemblyResolver(assemblyFileName, false, module.Metadata.DetectTargetFrameworkId());
-			foreach (var path in ReferencePaths)
+			foreach (var path in (ReferencePaths ?? Array.Empty<string>()))
 			{
 				resolver.AddSearchDirectory(path);
 			}