Add --only-code-editor flag for open command

Author: chrisyarbrough

TestPlan.md

@@ -25,6 +25,8 @@ This document contains test cases that need to be verified before releasing a ne
 | Favorites flag alias (--favorite)        | `unity open --favorites`                                 | Alias for --favorite                                            |  [ ]  |
 | Open with code editor                    | `unity open path --code-editor`                          | Opens project's solution file in default code editor            |  [ ]  |
 | Open with code editor (no solution)      | `unity open path --code-editor` (not yet generated)      | Opens project's solution file as soon as it is generated        |  [ ]  |
+| Open only code editor                    | `unity open path --only-code-editor`                     | Opens only the code editor without launching Unity              |  [ ]  |
+| Code editor flags validation             | `unity open path --code-editor --only-code-editor`       | Shows error about mutually exclusive flags                      |  [ ]  |
 | Open with dry-run                        | `unity open path --dry-run`                              | Shows what would be executed without opening                    |  [ ]  |
 
 ### `create`

src/ucll/Commands/Completion/CompletionCommand.cs

@@ -51,6 +51,7 @@ private static string GenerateZshCompletion()
 		                    _arguments \
 		                        '(-f --favorite --favorites)'{-f,--favorite,--favorites}'[Use favorite projects only]' \
 		                        '(-c --code-editor)'{-c,--code-editor}'[Open the solution file in the default code editor]' \
+		                        '(-o --only-code-editor)'{-o,--only-code-editor}'[Open only the code editor without launching Unity]' \
 		                        '--dry-run[Show what would be executed without actually running mutating commands]'
 		                    ;;
 		                create)

src/ucll/Commands/Open/OpenCommand.cs

@@ -13,19 +13,22 @@ protected override int ExecuteImpl(OpenSettings settings)
 		infoLine += "\nVersion: " + project.VersionAndChangeset;
 		Debug.WriteLine(infoLine);
 
-		UnityHub.InstallEditorChecked(project.Version, project.Changeset, settings.MutatingProcess);
+		if (!settings.OnlyCodeEditor)
+		{
+			UnityHub.InstallEditorChecked(project.Version, project.Changeset, settings.MutatingProcess);
 
-		string editorPath = UnityHub.GetEditorPath(project.Version);
-		AnsiConsole.MarkupLine($"[dim]Editor: {editorPath}[/]");
+			string editorPath = UnityHub.GetEditorPath(project.Version);
+			AnsiConsole.MarkupLine($"[dim]Editor: {editorPath}[/]");
 
-		string[] additionalArgs = Context.Remaining.Raw.ToArray();
-		var args = new List<string> { "-projectPath", project.Path };
-		args.AddRange(additionalArgs);
+			string[] additionalArgs = Context.Remaining.Raw.ToArray();
+			var args = new List<string> { "-projectPath", project.Path };
+			args.AddRange(additionalArgs);
 
-		settings.MutatingProcess.Run(
-			new ProcessStartInfo(fileName: editorPath, arguments: ProcessRunner.JoinQuoted(args)));
+			settings.MutatingProcess.Run(
+				new ProcessStartInfo(fileName: editorPath, arguments: ProcessRunner.JoinQuoted(args)));
+		}
 
-		if (settings.CodeEditor)
+		if (settings.CodeEditor || settings.OnlyCodeEditor)
 		{
 			OpenSolutionFile(project.Path, settings.MutatingProcess);
 		}

src/ucll/Commands/Open/OpenSettings.cs

@@ -13,4 +13,21 @@ internal class OpenSettings : MutatingSettings
 	[CommandOption("-c|--code-editor")]
 	[Description("Open the solution file in the default code editor")]
 	public bool CodeEditor { get; init; }
+
+	[CommandOption("-o|--only-code-editor")]
+	[Description("Open only the code editor without launching Unity")]
+	public bool OnlyCodeEditor { get; init; }
+
+	public override ValidationResult Validate()
+	{
+		if (CodeEditor && OnlyCodeEditor)
+		{
+			return ValidationResult.Error(
+				"Cannot use both --code-editor and --only-code-editor. " +
+				"Use --code-editor to open both Unity and the code editor, " +
+				"or --only-code-editor to open only the code editor.");
+		}
+
+		return base.Validate();
+	}
 }

src/ucll/Program.cs

@@ -17,6 +17,7 @@
 	config.SetApplicationVersion("0.2.0");
 	config.AddExample("open");
 	config.AddExample("open", "searchPath", "--code-editor");
+	config.AddExample("open", "searchPath", "--only-code-editor");
 	config.AddExample("open", "searchPath", "--", "-batchmode", "-quit");
 
 	config.AddCommand<OpenCommand>("open")
@@ -25,6 +26,7 @@
 		.WithExample("open", "--favorite")
 		.WithExample("open", ".")
 		.WithExample("open", "searchPath", "--code-editor")
+		.WithExample("open", "searchPath", "--only-code-editor")
 		.WithExample("open", "searchPath", "--", "-batchmode", "-quit");
 
 	config.AddCommand<CreateCommand>("create")