Remove feature flag for transitive #: directives

documentation/general/dotnet-run-file.md

@@ -261,7 +261,6 @@ and can do that efficiently by stopping the search when it sees the first "C# to
 
 For a given `dotnet run file.cs`, we include directives from the current entry point file (`file.cs`) and all other non-entry-point C# files,
 specifically from all `Compile` items included in the project, no matter whether the `Compile` items are specified in some MSBuild code or inferred from `#:include`.
-(Processing directives from other files is currently gated under a feature flag that can be enabled by setting the MSBuild property `ExperimentalFileBasedProgramEnableTransitiveDirectives=true`.)
 The order in which other files are processed is currently unspecified (can change across SDK versions) but deterministic (stable in a given SDK version).
 We do not limit these directives to appear only in entry point files because it allows:
 - a non-entry-point file like `Util.cs` to be self-contained and have all the `#:package`s it needs specified in it,

src/Cli/Microsoft.DotNet.FileBasedPrograms/FileLevelDirectiveHelpers.cs

@@ -693,7 +693,6 @@ public enum IncludeOrExcludeKind
     /// </summary>
     public sealed class IncludeOrExclude(in ParseInfo info) : Named(info)
     {
-        public const string ExperimentalFileBasedProgramEnableTransitiveDirectives = nameof(ExperimentalFileBasedProgramEnableTransitiveDirectives);
         public const string MappingPropertyName = "FileBasedProgramsItemMapping";
 
         public static string DefaultMappingString => ".cs=Compile;.resx=EmbeddedResource;.json=None;.razor=Content";

src/Cli/Microsoft.DotNet.FileBasedPrograms/InternalAPI.Unshipped.txt

@@ -1,4 +1,3 @@
-const Microsoft.DotNet.FileBasedPrograms.CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives = "ExperimentalFileBasedProgramEnableTransitiveDirectives" -> string!
 const Microsoft.DotNet.FileBasedPrograms.CSharpDirective.IncludeOrExclude.MappingPropertyName = "FileBasedProgramsItemMapping" -> string!
 const Microsoft.DotNet.FileBasedPrograms.CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective = "ExperimentalFileBasedProgramEnableRefDirective" -> string!
 Microsoft.DotNet.FileBasedPrograms.CSharpDirective

src/Microsoft.DotNet.ProjectTools/VirtualProjectBuilder.cs

@@ -437,19 +437,13 @@ private void CheckDirectives(
         ErrorReporter reportError)
     {
         bool? refEnabled = null;
-        bool? transitiveEnabled = null;
 
         foreach (var directive in directives)
         {
             if (directive is CSharpDirective.Ref)
             {
                 CheckFlagEnabled(ref refEnabled, CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective, directive);
             }
-
-            if (directive.Info.SourceFile.Path != EntryPointSourceFile.Path)
-            {
-                CheckFlagEnabled(ref transitiveEnabled, CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives, directive);
-            }
         }
 
         void CheckFlagEnabled(ref bool? flag, string flagName, CSharpDirective directive)

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

@@ -1249,9 +1249,6 @@ public static class B
             """);
         File.WriteAllText(Path.Join(testInstance.Path, "Directory.Build.props"), $"""
             <Project>
-              <PropertyGroup>
-                <{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>true</{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>
-              </PropertyGroup>
               <ItemGroup>
                 <Compile Include="B.cs" />
               </ItemGroup>
@@ -4081,7 +4078,6 @@ public void RefDirective_DuplicateRefFromIncludedFiles()
             <Project>
               <PropertyGroup>
                 <{CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective}>true</{CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective}>
-                <{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>true</{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>
               </PropertyGroup>
             </Project>
             """);
@@ -4139,7 +4135,6 @@ public void RefDirective_DuplicateRefFromIncludedFiles_Subdirectories()
             <Project>
               <PropertyGroup>
                 <{CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective}>true</{CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective}>
-                <{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>true</{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>
               </PropertyGroup>
             </Project>
             """);
@@ -4204,7 +4199,6 @@ public void RefDirective_IncludeAndRefSameFile()
             <Project>
               <PropertyGroup>
                 <{CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective}>true</{CSharpDirective.Ref.ExperimentalFileBasedProgramEnableRefDirective}>
-                <{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>true</{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>
               </PropertyGroup>
             </Project>
             """);
@@ -4340,14 +4334,6 @@ public void IncludeDirective_Transitive()
         Directory.CreateDirectory(Path.Join(testInstance.Path, "dir1/dir2"));
         Directory.CreateDirectory(Path.Join(testInstance.Path, "dir3"));
 
-        File.WriteAllText(Path.Join(testInstance.Path, "dir1/Directory.Build.props"), $"""
-            <Project>
-              <PropertyGroup>
-                <{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>true</{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>
-              </PropertyGroup>
-            </Project>
-            """);
-
         var a = """
             B.M();
             """;
@@ -4598,14 +4584,6 @@ public void IncludeDirective_UpToDate_ProjectReference()
     {
         var testInstance = _testAssetsManager.CreateTestDirectory();
 
-        File.WriteAllText(Path.Join(testInstance.Path, "Directory.Build.props"), $"""
-            <Project>
-              <PropertyGroup>
-                <{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>true</{CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives}>
-              </PropertyGroup>
-            </Project>
-            """);
-
         var libDir = Path.Join(testInstance.Path, "Lib");
         Directory.CreateDirectory(libDir);
 
@@ -4665,44 +4643,6 @@ class UtilClass
         Build(testInstance, BuildLevel.All, expectedOutput: expectedOutput, workDir: appDir);
     }
 
-    /// <summary>
-    /// Transitive directives (directives in non-entry-point files) are gated behind a feature flag.
-    /// </summary>
-    [Fact]
-    public void IncludeDirective_FeatureFlags()
-    {
-        var testInstance = _testAssetsManager.CreateTestDirectory();
-
-        File.WriteAllText(Path.Join(testInstance.Path, "Program.cs"), """
-            #!/usr/bin/env dotnet
-            #:include Util.cs
-            Console.WriteLine(Util.M());
-            """);
-
-        var utilPath = Path.Join(testInstance.Path, "Util.cs");
-        File.WriteAllText(utilPath, """
-            #:property DefineConstants=MY_CONST
-            static class Util { public static string M() => "Hello from Util"; }
-            """);
-
-        new DotnetCommand(Log, "run", "Program.cs")
-            .WithWorkingDirectory(testInstance.Path)
-            .Execute()
-            .Should().Fail()
-            .And.HaveStdErr($"""
-                {DirectiveError(utilPath, 1, Resources.ExperimentalFeatureDisabled, CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives)}
-
-                {CliCommandStrings.RunCommandException}
-                """);
-
-        new DotnetCommand(Log, "run", "Program.cs")
-            .WithWorkingDirectory(testInstance.Path)
-            .WithEnvironmentVariable(CSharpDirective.IncludeOrExclude.ExperimentalFileBasedProgramEnableTransitiveDirectives, "true")
-            .Execute()
-            .Should().Pass()
-            .And.HaveStdOut("Hello from Util");
-    }
-
     [Fact]
     public void IncludeDirective_CustomMapping()
     {