Set runtime config values for path to executing script

src/Cli/Microsoft.DotNet.Cli.Utils/BuiltInCommand.cs

@@ -181,4 +181,9 @@ public ICommand SetCommandArgs(string commandArgs)
     {
         throw new NotImplementedException();
     }
+
+    public ICommand StandardOutputEncoding(Encoding encoding)
+    {
+        throw new NotImplementedException();
+    }
 }

src/Cli/Microsoft.DotNet.Cli.Utils/Command.cs

@@ -101,6 +101,12 @@ public ICommand EnvironmentVariable(string name, string? value)
         return this;
     }
 
+    public ICommand StandardOutputEncoding(Encoding encoding)
+    {
+        _process.StartInfo.StandardOutputEncoding = encoding;
+        return this;
+    }
+
     public ICommand CaptureStdOut()
     {
         ThrowIfRunning();

src/Cli/Microsoft.DotNet.Cli.Utils/ICommand.cs

@@ -25,6 +25,8 @@ public interface ICommand
 
     ICommand SetCommandArgs(string commandArgs);
 
+    ICommand StandardOutputEncoding(Encoding encoding);
+
     string CommandName { get; }
 
     string CommandArgs { get; }

src/Cli/dotnet/Commands/Run/VirtualProjectBuildingCommand.cs

@@ -87,7 +87,6 @@ public VirtualProjectBuildingCommand(
     public override int Execute()
     {
         Debug.Assert(!(NoRestore && NoBuild));
-
         var consoleLogger = RunCommand.MakeTerminalLogger(Verbosity);
         var binaryLogger = GetBinaryLogger(BinaryLoggerArgs);
 
@@ -625,6 +624,15 @@ public static void WriteProjectFile(
 
                 """);
 
+            var targetDirectory = Path.GetDirectoryName(targetFilePath) ?? "";
+            writer.WriteLine($"""
+                  <ItemGroup>
+                    <RuntimeHostConfigurationOption Include="EntryPointFilePath" Value="{EscapeValue(targetFilePath)}" />
+                    <RuntimeHostConfigurationOption Include="EntryPointFileDirectoryPath" Value="{EscapeValue(targetDirectory)}" />
+                  </ItemGroup>
+
+                """);
+
             foreach (var sdk in sdkDirectives)
             {
                 WriteImport(writer, "Sdk.targets", sdk);

test/Microsoft.NET.TestFramework/Commands/TestCommand.cs

@@ -26,6 +26,8 @@ public abstract class TestCommand
         public Action<string>? CommandOutputHandler { get; set; }
         public Action<Process>? ProcessStartedHandler { get; set; }
 
+        public Encoding? StandardOutputEncoding { get; set; }
+
         protected TestCommand(ITestOutputHelper log)
         {
             Log = log;
@@ -57,6 +59,12 @@ public TestCommand WithStandardInput(string stdin)
             return this;
         }
 
+        public TestCommand WithStandardOutputEncoding(Encoding encoding)
+        {
+            StandardOutputEncoding = encoding;
+            return this;
+        }
+
         /// <summary>
         /// Instructs not to escape the arguments when launching command.
         /// This may be used to pass ready arguments line as single string argument.
@@ -153,6 +161,11 @@ public virtual CommandResult Execute(IEnumerable<string> args)
             {
                 Log.WriteLine($"❌{line}");
             });
+
+            if (StandardOutputEncoding is not null)
+            {
+                command.StandardOutputEncoding(StandardOutputEncoding);
+            }
 
             string fileToShow = Path.GetFileNameWithoutExtension(spec.FileName!).Equals("dotnet", StringComparison.OrdinalIgnoreCase) ?
                 "dotnet" :

test/dotnet.Tests/CommandTests/Run/RunFileTests.cs

@@ -1,4 +1,4 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Runtime.Versioning;
@@ -1246,6 +1246,11 @@ public void Api()
                         <Compile Include="{programPath}" />
                       </ItemGroup>
 
+                      <ItemGroup>
+                        <RuntimeHostConfigurationOption Include="EntryPointFilePath" Value="{programPath}" />
+                        <RuntimeHostConfigurationOption Include="EntryPointFileDirectoryPath" Value="{testInstance.Path}" />
+                      </ItemGroup>
+
                       <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
                       <Import Project="Sdk.targets" Sdk="Aspire.Hosting.Sdk" Version="9.1.0" />
 
@@ -1329,6 +1334,11 @@ public void Api_Diagnostic_01()
                         <Compile Include="{programPath}" />
                       </ItemGroup>
 
+                      <ItemGroup>
+                        <RuntimeHostConfigurationOption Include="EntryPointFilePath" Value="{programPath}" />
+                        <RuntimeHostConfigurationOption Include="EntryPointFileDirectoryPath" Value="{testInstance.Path}" />
+                      </ItemGroup>
+
                       <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
 
                       <!--
@@ -1415,6 +1425,11 @@ public void Api_Diagnostic_02()
                         <Compile Include="{programPath}" />
                       </ItemGroup>
 
+                      <ItemGroup>
+                        <RuntimeHostConfigurationOption Include="EntryPointFilePath" Value="{programPath}" />
+                        <RuntimeHostConfigurationOption Include="EntryPointFileDirectoryPath" Value="{testInstance.Path}" />
+                      </ItemGroup>
+
                       <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
 
                       <!--
@@ -1470,4 +1485,110 @@ public void Api_Error()
             .And.HaveStdOutContaining("Unknown1")
             .And.HaveStdOutContaining("Unknown2");
     }
+
+    [Fact]
+    public void EntryPointFilePath()
+    {
+        var testInstance = _testAssetsManager.CreateTestDirectory();
+        var filePath = Path.Join(testInstance.Path, "Program.cs");
+        File.WriteAllText(filePath, """"
+            var entryPointFilePath = AppContext.GetData("EntryPointFilePath") as string;
+            Console.WriteLine($"""EntryPointFilePath: {entryPointFilePath}""");
+            """");
+
+        new DotnetCommand(Log, "run", "Program.cs")
+            .WithWorkingDirectory(testInstance.Path)
+            .Execute()
+            .Should().Pass()
+            .And.HaveStdOut($"EntryPointFilePath: {filePath}");
+    }
+
+    [Fact]
+    public void EntryPointFileDirectoryPath()
+    {
+        var testInstance = _testAssetsManager.CreateTestDirectory();
+        File.WriteAllText(Path.Join(testInstance.Path, "Program.cs"), """"
+            var entryPointFileDirectoryPath = AppContext.GetData("EntryPointFileDirectoryPath") as string;
+            Console.WriteLine($"""EntryPointFileDirectoryPath: {entryPointFileDirectoryPath}""");
+            """");
+
+        new DotnetCommand(Log, "run", "Program.cs")
+            .WithWorkingDirectory(testInstance.Path)
+            .Execute()
+            .Should().Pass()
+            .And.HaveStdOut($"EntryPointFileDirectoryPath: {testInstance.Path}");
+    }
+
+    [Fact]
+    public void EntryPointFilePath_WithRelativePath()
+    {
+        var testInstance = _testAssetsManager.CreateTestDirectory();
+        var fileName = "Program.cs";
+        File.WriteAllText(Path.Join(testInstance.Path, fileName), """
+            var entryPointFilePath = AppContext.GetData("EntryPointFilePath") as string;
+            Console.WriteLine($"EntryPointFilePath: {entryPointFilePath}");
+            """);
+
+        var relativePath = Path.GetRelativePath(Directory.GetCurrentDirectory(), Path.Join(testInstance.Path, fileName));
+        new DotnetCommand(Log, "run", relativePath)
+            .WithWorkingDirectory(Directory.GetCurrentDirectory())
+            .Execute()
+            .Should().Pass()
+            .And.HaveStdOut($"EntryPointFilePath: {Path.GetFullPath(relativePath)}");
+    }
+
+    [Fact]
+    public void EntryPointFilePath_WithSpacesInPath()
+    {
+        var testInstance = _testAssetsManager.CreateTestDirectory();
+        var dirWithSpaces = Path.Join(testInstance.Path, "dir with spaces");
+        Directory.CreateDirectory(dirWithSpaces);
+        var filePath = Path.Join(dirWithSpaces, "Program.cs");
+        File.WriteAllText(filePath, """
+        var entryPointFilePath = AppContext.GetData("EntryPointFilePath") as string;
+        Console.WriteLine($"EntryPointFilePath: {entryPointFilePath}");
+        """);
+
+        new DotnetCommand(Log, "run", filePath)
+            .WithWorkingDirectory(testInstance.Path)
+            .Execute()
+            .Should().Pass()
+            .And.HaveStdOut($"EntryPointFilePath: {filePath}");
+    }
+
+    [Fact]
+    public void EntryPointFileDirectoryPath_WithDotSlash()
+    {
+        var testInstance = _testAssetsManager.CreateTestDirectory();
+        var fileName = "Program.cs";
+        File.WriteAllText(Path.Join(testInstance.Path, fileName), """
+        var entryPointFileDirectoryPath = AppContext.GetData("EntryPointFileDirectoryPath") as string;
+        Console.WriteLine($"EntryPointFileDirectoryPath: {entryPointFileDirectoryPath}");
+        """);
+
+        new DotnetCommand(Log, "run", $"./{fileName}")
+            .WithWorkingDirectory(testInstance.Path)
+            .Execute()
+            .Should().Pass()
+            .And.HaveStdOut($"EntryPointFileDirectoryPath: {testInstance.Path}");
+    }
+
+    [Fact]
+    public void EntryPointFilePath_WithUnicodeCharacters()
+    {
+        var testInstance = _testAssetsManager.CreateTestDirectory();
+        var unicodeFileName = "Программа.cs";
+        var filePath = Path.Join(testInstance.Path, unicodeFileName);
+        File.WriteAllText(filePath, """
+        var entryPointFilePath = AppContext.GetData("EntryPointFilePath") as string;
+        Console.WriteLine($"EntryPointFilePath: {entryPointFilePath}");
+        """);
+
+        new DotnetCommand(Log, "run", unicodeFileName)
+            .WithWorkingDirectory(testInstance.Path)
+            .WithStandardOutputEncoding(Encoding.UTF8)
+            .Execute()
+            .Should().Pass()
+            .And.HaveStdOut($"EntryPointFilePath: {filePath}");
+    }
 }