Replace Csc task with Roslyn API in FileTrackerTests

Directory.Packages.props

@@ -17,6 +17,7 @@
     <PackageVersion Include="Microsoft.Build.NuGetSdkResolver" Version="$(NuGetBuildTasksVersion)" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Collections" Version="$(MicrosoftCodeAnalysisCollectionsVersion)" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Contracts" Version="$(MicrosoftCodeAnalysisContractsVersion)" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftCodeAnalysisCSharpVersion)" />
     <PackageVersion Include="Microsoft.CodeAnalysis.PooledObjects" Version="$(MicrosoftCodeAnalysisPooledObjectsVersion)" />
     <PackageVersion Include="Microsoft.DotNet.XUnitV3Extensions" Version="$(MicrosoftDotNetXUnitV3ExtensionsVersion)" />
     <PackageVersion Include="Microsoft.IO.Redist" Version="$(MicrosoftIORedistVersion)" />

eng/Versions.props

@@ -77,6 +77,7 @@
        When updating the version make sure to add the new version to source-build-assets first. -->
     <MicrosoftCodeAnalysisCollectionsVersion>5.0.0-1.25277.114</MicrosoftCodeAnalysisCollectionsVersion>
     <MicrosoftCodeAnalysisContractsVersion>5.0.0-1.25277.114</MicrosoftCodeAnalysisContractsVersion>
+    <MicrosoftCodeAnalysisCSharpVersion>5.0.0-1.25277.114</MicrosoftCodeAnalysisCSharpVersion>
     <MicrosoftCodeAnalysisPooledObjectsVersion>5.0.0-1.25277.114</MicrosoftCodeAnalysisPooledObjectsVersion>
   </PropertyGroup>
 

src/Utilities.UnitTests/Microsoft.Build.Utilities.UnitTests.csproj

@@ -1,3 +1,3 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
@@ -13,6 +13,7 @@
     <Reference Include="System.Net.Http" Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'" />
 
     <PackageReference Include="Shouldly" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" />
 
     <ProjectReference Include="..\Utilities\Microsoft.Build.Utilities.csproj" />
     <ProjectReference Include="..\Build\Microsoft.Build.csproj" />

src/Utilities.UnitTests/TrackedDependencies/FileTrackerTests.cs

@@ -15,9 +15,9 @@
 using Microsoft.Build.Shared;
 using Microsoft.Build.Utilities;
 
-#if ENABLE_TRACKER_TESTS // https://github.com/dotnet/msbuild/issues/12063
-using Microsoft.CodeAnalysis.BuildTasks;
-#endif
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.Emit;
 
 using Xunit;
 using Windows.Win32;
@@ -250,6 +250,39 @@ public void Dispose()
             FileTrackerTestHelper.CleanTlogs();
         }
 
+        [Fact]
+        public void CompileCSharpExecutable_CompilesSimpleProgram()
+        {
+            if (NativeMethodsShared.IsUnixLike)
+            {
+                return; // This test is Windows-only
+            }
+
+            string outputFile = Path.Combine(Path.GetTempPath(), $"TestCompile_{Guid.NewGuid()}.exe");
+            try
+            {
+                string codeContent = @"
+using System;
+class Program
+{
+    static void Main()
+    {
+        Console.WriteLine(""Hello from compiled code!"");
+    }
+}";
+                bool compileSucceeded = FileTrackerTestHelper.CompileCSharpExecutable(codeContent, outputFile);
+                Assert.True(compileSucceeded, "Compilation should succeed");
+                Assert.True(File.Exists(outputFile), "Output executable should exist");
+            }
+            finally
+            {
+                if (File.Exists(outputFile))
+                {
+                    File.Delete(outputFile);
+                }
+            }
+        }
+
         [Fact(Skip = "FileTracker tests require VS2015 Update 3 or a packaged version of Tracker.exe https://github.com/dotnet/msbuild/issues/649")]
         public void FileTrackerHelp()
         {
@@ -444,8 +477,6 @@ public void FileTrackerFindStrInOperationsExtended_AttributesOnly()
             Assert.True(foundCreateFileW || foundCreateFileA);
         }
 
-
-#if ENABLE_TRACKER_TESTS // https://github.com/dotnet/msbuild/issues/12063
         [Fact(Skip = "FileTracker tests require VS2015 Update 3 or a packaged version of Tracker.exe https://github.com/dotnet/msbuild/issues/649")]
         public void FileTrackerExtendedDirectoryTracking()
         {
@@ -454,7 +485,6 @@ public void FileTrackerExtendedDirectoryTracking()
             File.Delete("directoryattributes.read.1.tlog");
             File.Delete("directoryattributes.write.1.tlog");
 
-            string codeFile = null;
             string outputFile = Path.Combine(Path.GetTempPath(), "directoryattributes.exe");
             string codeContent = @"
 using System.IO;
@@ -479,13 +509,8 @@ static void Main(string[] args)
 
             try
             {
-                codeFile = FileUtilities.GetTemporaryFileName();
-                File.WriteAllText(codeFile, codeContent);
-                Csc csc = new Csc();
-                csc.BuildEngine = new MockEngine3();
-                csc.Sources = new ITaskItem[] { new TaskItem(codeFile) };
-                csc.OutputAssembly = new TaskItem(outputFile);
-                csc.Execute();
+                bool compileSucceeded = FileTrackerTestHelper.CompileCSharpExecutable(codeContent, outputFile);
+                Assert.True(compileSucceeded);
 
                 string trackerPath = FileTracker.GetTrackerPath(ExecutableType.ManagedIL);
                 string fileTrackerPath = FileTracker.GetFileTrackerPath(ExecutableType.ManagedIL);
@@ -563,7 +588,6 @@ static void Main(string[] args)
             }
             finally
             {
-                File.Delete(codeFile);
                 File.Delete(outputFile);
             }
         }
@@ -576,21 +600,15 @@ public void FileTrackerFindStrInIncludeDuplicates()
             File.Delete("findstr.read.1.tlog");
             FileTrackerTestHelper.WriteAll("test.in", "foo");
 
-            string codeFile = null;
             string outputFile = Path.Combine(Path.GetTempPath(), "readtwice.exe");
             File.Delete(outputFile);
 
             try
             {
                 string inputPath = Path.GetFullPath("test.in");
-                codeFile = FileUtilities.GetTemporaryFileName();
                 string codeContent = @"using System.IO; class X { static void Main() { File.ReadAllText(@""" + inputPath + @"""); File.ReadAllText(@""" + inputPath + @"""); }}";
-                File.WriteAllText(codeFile, codeContent);
-                Csc csc = new Csc();
-                csc.BuildEngine = new MockEngine3();
-                csc.Sources = new[] { new TaskItem(codeFile) };
-                csc.OutputAssembly = new TaskItem(outputFile);
-                csc.Execute();
+                bool compileSucceeded = FileTrackerTestHelper.CompileCSharpExecutable(codeContent, outputFile);
+                Assert.True(compileSucceeded);
 
                 string trackerPath = FileTracker.GetTrackerPath(ExecutableType.ManagedIL);
                 string fileTrackerPath = FileTracker.GetFileTrackerPath(ExecutableType.ManagedIL);
@@ -602,7 +620,6 @@ public void FileTrackerFindStrInIncludeDuplicates()
             }
             finally
             {
-                File.Delete(codeFile);
                 File.Delete(outputFile);
             }
 
@@ -632,7 +649,6 @@ public void FileTrackerDoNotRecordWriteAsRead()
             try
             {
                 writeFile = Path.Combine(testDirectory, "test.out");
-                string codeFile = Path.Combine(testDirectory, "code.cs");
                 string codeContent = @"
 using System.IO;
 using System.Runtime.InteropServices;
@@ -646,14 +662,8 @@ static void Main()
     }
 }";
 
-                File.WriteAllText(codeFile, codeContent);
-                Csc csc = new Csc();
-                csc.BuildEngine = new MockEngine3();
-                csc.Sources = new[] { new TaskItem(codeFile) };
-                csc.OutputAssembly = new TaskItem(outputFile);
-                bool success = csc.Execute();
-
-                Assert.True(success);
+                bool compileSucceeded = FileTrackerTestHelper.CompileCSharpExecutable(codeContent, outputFile);
+                Assert.True(compileSucceeded);
 
                 string trackerPath = FileTracker.GetTrackerPath(ExecutableType.ManagedIL);
                 string fileTrackerPath = FileTracker.GetFileTrackerPath(ExecutableType.ManagedIL);
@@ -674,7 +684,6 @@ static void Main()
             FileTrackerTestHelper.AssertDidntFindStringInTLog("CreateFileW, Desired Access=0xc0000000, Creation Disposition=0x1:" + writeFile.ToUpperInvariant(), "writenoread.read.1.tlog");
             FileTrackerTestHelper.AssertFoundStringInTLog("CreateFileW, Desired Access=0xc0000000, Creation Disposition=0x1:" + writeFile.ToUpperInvariant(), "writenoread.write.1.tlog");
         }
-#endif // ENABLE_TRACKER_TESTS
 
         [Fact(Skip = "FileTracker tests require VS2015 Update 3 or a packaged version of Tracker.exe https://github.com/dotnet/msbuild/issues/649")]
         public void FileTrackerFindStrInCommandLine()
@@ -2390,7 +2399,6 @@ public void LaunchMultipleOfSameTool_DifferentContexts()
             }
         }
 
-#if ENABLE_TRACKER_TESTS // https://github.com/dotnet/msbuild/issues/12063
         [Fact(Skip = "Needs investigation")]
         public void LaunchMultipleOfSameTool_ToolLaunchesOthers()
         {
@@ -2435,15 +2443,7 @@ static void Main(string[] args)
 
                 File.Delete(outputFile);
 
-                string codeFile = Path.Combine(testDir, "Program.cs");
-                File.WriteAllText(codeFile, codeContent);
-                Csc csc = new Csc();
-                csc.BuildEngine = new MockEngine3();
-                csc.Sources = new ITaskItem[] { new TaskItem(codeFile) };
-                csc.OutputAssembly = new TaskItem(outputFile);
-                csc.Platform = "x86";
-                bool compileSucceeded = csc.Execute();
-
+                bool compileSucceeded = FileTrackerTestHelper.CompileCSharpExecutable(codeContent, outputFile, "x86");
                 Assert.True(compileSucceeded);
 
                 // Item1: appname
@@ -2476,7 +2476,6 @@ static void Main(string[] args)
                 }
             }
         }
-#endif // ENABLE_TRACKER_TESTS
 
         private static void InProcTrackingSpawnsToolWithTracker(bool useTrackerResponseFile)
         {
@@ -2721,6 +2720,80 @@ public static void AssertFoundStringInTLog(string file, string tlog, int timesFo
         }
 
         public static void AssertFoundStringInTLog(string file, string tlog) => AssertFoundStringInTLog(file, tlog, 1);
+
+        /// <summary>
+        /// Compiles C# source code into an executable using Roslyn.
+        /// </summary>
+        /// <param name="sourceCode">The C# source code to compile.</param>
+        /// <param name="outputPath">The path where the executable will be written.</param>
+        /// <param name="platform">Optional platform target (e.g., "x86", "x64", "AnyCpu"). Defaults to AnyCpu.</param>
+        /// <returns>True if compilation succeeded, false otherwise.</returns>
+        public static bool CompileCSharpExecutable(string sourceCode, string outputPath, string platform = null)
+        {
+            SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(sourceCode);
+
+            string assemblyName = Path.GetFileNameWithoutExtension(outputPath);
+
+            // Add references to required assemblies
+            var references = new List<MetadataReference>
+            {
+                MetadataReference.CreateFromFile(typeof(object).Assembly.Location),
+                MetadataReference.CreateFromFile(typeof(Console).Assembly.Location),
+                MetadataReference.CreateFromFile(typeof(System.IO.File).Assembly.Location),
+                MetadataReference.CreateFromFile(typeof(System.Diagnostics.Process).Assembly.Location),
+                MetadataReference.CreateFromFile(typeof(System.Runtime.InteropServices.DllImportAttribute).Assembly.Location),
+            };
+
+            // Add reference to System.Runtime for core types
+            string runtimePath = Path.GetDirectoryName(typeof(object).Assembly.Location);
+            string systemRuntimePath = Path.Combine(runtimePath, "System.Runtime.dll");
+            if (File.Exists(systemRuntimePath))
+            {
+                references.Add(MetadataReference.CreateFromFile(systemRuntimePath));
+            }
+
+            // Determine platform
+            Platform targetPlatform = Platform.AnyCpu;
+            if (!string.IsNullOrEmpty(platform))
+            {
+                switch (platform.ToLowerInvariant())
+                {
+                    case "x86":
+                        targetPlatform = Platform.X86;
+                        break;
+                    case "x64":
+                        targetPlatform = Platform.X64;
+                        break;
+                    case "anycpu":
+                    default:
+                        targetPlatform = Platform.AnyCpu;
+                        break;
+                }
+            }
+
+            CSharpCompilationOptions options = new CSharpCompilationOptions(
+                OutputKind.ConsoleApplication,
+                optimizationLevel: OptimizationLevel.Release,
+                platform: targetPlatform);
+
+            CSharpCompilation compilation = CSharpCompilation.Create(
+                assemblyName,
+                syntaxTrees: new[] { syntaxTree },
+                references: references,
+                options: options);
+
+            EmitResult result = compilation.Emit(outputPath);
+
+            if (!result.Success)
+            {
+                foreach (Diagnostic diagnostic in result.Diagnostics.Where(d => d.Severity == DiagnosticSeverity.Error))
+                {
+                    Console.WriteLine($"Compilation error: {diagnostic.GetMessage()}");
+                }
+            }
+
+            return result.Success;
+        }
     }
 }
 #endif