Remove the dotnetSdkInstallationEnabled feature flag

extension/schemas/aspire-global-settings.schema.json

@@ -29,22 +29,6 @@
           "description": "Enable or disable watch mode by default when running Aspire applications for automatic restarts on file changes",
           "default": false
         },
-        "dotnetSdkInstallationEnabled": {
-          "anyOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "type": "string",
-              "enum": [
-                "true",
-                "false"
-              ]
-            }
-          ],
-          "description": "Enable or disable automatic .NET SDK installation when a required SDK version is missing",
-          "default": true
-        },
         "execCommandEnabled": {
           "anyOf": [
             {

extension/schemas/aspire-settings.schema.json

@@ -33,22 +33,6 @@
           "description": "Enable or disable watch mode by default when running Aspire applications for automatic restarts on file changes",
           "default": false
         },
-        "dotnetSdkInstallationEnabled": {
-          "anyOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "type": "string",
-              "enum": [
-                "true",
-                "false"
-              ]
-            }
-          ],
-          "description": "Enable or disable automatic .NET SDK installation when a required SDK version is missing",
-          "default": true
-        },
         "execCommandEnabled": {
           "anyOf": [
             {

src/Aspire.Cli/Aspire.Cli.csproj

@@ -186,8 +186,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <EmbeddedResource Include="Resources\dotnet-install.sh" />
-    <EmbeddedResource Include="Resources\dotnet-install.ps1" />
     <EmbeddedResource Include="$(SharedDir)Mcp\Resources\aspire-16.png" Link="Mcp\Resources\aspire-16.png" />
     <EmbeddedResource Include="$(SharedDir)Mcp\Resources\aspire-256.png" Link="Mcp\Resources\aspire-256.png" />
     <EmbeddedResource Include="$(SharedDir)Mcp\Resources\aspire-32.png" Link="Mcp\Resources\aspire-32.png" />

src/Aspire.Cli/Commands/AddCommand.cs

@@ -86,7 +86,7 @@ protected override async Task<int> ExecuteAsync(ParseResult parseResult, Cancell
             // Check if the .NET SDK is available (only needed for .NET projects)
             if (project.LanguageId == KnownLanguageId.CSharp)
             {
-                if (!await SdkInstallHelper.EnsureSdkInstalledAsync(_sdkInstaller, InteractionService, _features, Telemetry, _hostEnvironment, cancellationToken))
+                if (!await SdkInstallHelper.EnsureSdkInstalledAsync(_sdkInstaller, InteractionService, Telemetry, cancellationToken))
                 {
                     return ExitCodeConstants.SdkNotInstalled;
                 }

src/Aspire.Cli/Commands/ExecCommand.cs

@@ -24,8 +24,6 @@ internal class ExecCommand : BaseCommand
     private readonly IProjectLocator _projectLocator;
     private readonly IAnsiConsole _ansiConsole;
     private readonly IDotNetSdkInstaller _sdkInstaller;
-    private readonly ICliHostEnvironment _hostEnvironment;
-    private readonly IFeatures _features;
 
     private static readonly OptionWithLegacy<FileInfo?> s_appHostOption = new("--apphost", "--project", ExecCommandStrings.ProjectArgumentDescription);
     private static readonly Option<string> s_resourceOption = new("--resource", "-r")
@@ -55,16 +53,14 @@ public ExecCommand(
         IDotNetSdkInstaller sdkInstaller,
         IFeatures features,
         ICliUpdateNotifier updateNotifier,
-        CliExecutionContext executionContext, ICliHostEnvironment hostEnvironment)
+        CliExecutionContext executionContext)
         : base("exec", ExecCommandStrings.Description, features, updateNotifier, executionContext, interactionService, telemetry)
     {
         _runner = runner;
         _certificateService = certificateService;
         _projectLocator = projectLocator;
         _ansiConsole = ansiConsole;
         _sdkInstaller = sdkInstaller;
-        _hostEnvironment = hostEnvironment;
-        _features = features;
 
         Options.Add(s_appHostOption);
         Options.Add(s_resourceOption);
@@ -79,7 +75,7 @@ public ExecCommand(
     protected override async Task<int> ExecuteAsync(ParseResult parseResult, CancellationToken cancellationToken)
     {
         // Check if the .NET SDK is available
-        if (!await SdkInstallHelper.EnsureSdkInstalledAsync(_sdkInstaller, InteractionService, _features, Telemetry, _hostEnvironment, cancellationToken))
+        if (!await SdkInstallHelper.EnsureSdkInstalledAsync(_sdkInstaller, InteractionService, Telemetry, cancellationToken))
         {
             return ExitCodeConstants.SdkNotInstalled;
         }

src/Aspire.Cli/Commands/InitCommand.cs

@@ -33,8 +33,6 @@ internal sealed class InitCommand : BaseCommand, IPackageMetaPrefetchingCommand
     private readonly IPackagingService _packagingService;
     private readonly ISolutionLocator _solutionLocator;
     private readonly IDotNetSdkInstaller _sdkInstaller;
-    private readonly ICliHostEnvironment _hostEnvironment;
-    private readonly IFeatures _features;
     private readonly ICliUpdateNotifier _updateNotifier;
     private readonly CliExecutionContext _executionContext;
     private readonly IConfigurationService _configurationService;
@@ -78,7 +76,6 @@ public InitCommand(
         IFeatures features,
         ICliUpdateNotifier updateNotifier,
         CliExecutionContext executionContext,
-        ICliHostEnvironment hostEnvironment,
         IInteractionService interactionService,
         IConfigurationService configurationService,
         ILanguageService languageService,
@@ -93,8 +90,6 @@ public InitCommand(
         _packagingService = packagingService;
         _solutionLocator = solutionLocator;
         _sdkInstaller = sdkInstaller;
-        _hostEnvironment = hostEnvironment;
-        _features = features;
         _updateNotifier = updateNotifier;
         _executionContext = executionContext;
         _configurationService = configurationService;
@@ -149,7 +144,7 @@ protected override async Task<int> ExecuteAsync(ParseResult parseResult, Cancell
         }
 
         // For C#, we need the .NET SDK
-        if (!await SdkInstallHelper.EnsureSdkInstalledAsync(_sdkInstaller, InteractionService, _features, Telemetry, _hostEnvironment, cancellationToken))
+        if (!await SdkInstallHelper.EnsureSdkInstalledAsync(_sdkInstaller, InteractionService, Telemetry, cancellationToken))
         {
             return ExitCodeConstants.SdkNotInstalled;
         }

src/Aspire.Cli/DotNet/DotNetCliRunner.cs

@@ -441,15 +441,6 @@ public async Task<int> RunAsync(FileInfo projectFile, bool watch, bool noBuild,
             }
         }
 
-        if (features.IsFeatureEnabled(KnownFeatures.DotNetSdkInstallationEnabled, true))
-        {
-            // Only set the environment variable if it's not already set by the user
-            if (!finalEnv.ContainsKey("DOTNET_ROLL_FORWARD"))
-            {
-                finalEnv["DOTNET_ROLL_FORWARD"] = "LatestMajor";
-            }
-        }
-
         // Set the backchannel socket path when backchannel is configured
         if (backchannelCompletionSource is not null)
         {