feat(cmd): add task selection

cmd/lk/app.go

@@ -88,7 +88,7 @@ var (
 				{
 					Name:      "install",
 					Usage:     "Execute installation defined in " + bootstrap.TaskFile,
-					ArgsUsage: "`DIR` location or the project directory (default: current directory)",
+					ArgsUsage: "`[DIR]` location of the project directory (default: current directory)",
 					Before:    requireProject,
 					Action:    installTemplate,
 				},
@@ -103,7 +103,7 @@ var (
 				{
 					Name:      "run",
 					Usage:     "Execute a task defined in " + bootstrap.TaskFile,
-					ArgsUsage: "`DIR` location or the project directory (default: current directory)",
+					ArgsUsage: "`[TASK]` to run in the project's taskfile.yaml",
 					Action:    runTask,
 				},
 			},
@@ -375,17 +375,29 @@ func doInstall(ctx context.Context, task bootstrap.KnownTask, rootPath string, v
 
 func runTask(ctx context.Context, cmd *cli.Command) error {
 	verbose := cmd.Bool("verbose")
-	taskName := cmd.Args().First()
-	if taskName == "" {
-		return errors.New("task name is required")
-	}
-
 	rootDir := "."
 	tf, err := bootstrap.ParseTaskfile(rootDir)
 	if err != nil {
 		return err
 	}
 
+	taskName := cmd.Args().First()
+	if taskName == "" {
+		var options []huh.Option[string]
+		for _, name := range tf.Tasks.Keys() {
+			options = append(options, huh.NewOption(name, name))
+		}
+
+		if err := huh.NewSelect[string]().
+			Title("Select Task").
+			Options(options...).
+			Value(&taskName).
+			WithTheme(theme).
+			Run(); err != nil {
+			return err
+		}
+	}
+
 	task, err := bootstrap.NewTask(ctx, tf, rootDir, taskName, cmd.Bool("verbose"))
 	if err != nil {
 		return err