feat: handle new command errors better (#1318)

apps/cli/src/utils/error-handler.ts

@@ -0,0 +1,60 @@
+/**
+ * @fileoverview Centralized error handling utilities for CLI
+ * Provides consistent error formatting and debug mode detection
+ */
+
+import chalk from 'chalk';
+
+/**
+ * Check if debug mode is enabled via environment variable
+ * Only returns true when DEBUG is explicitly set to 'true' or '1'
+ *
+ * @returns True if debug mode is enabled
+ */
+export function isDebugMode(): boolean {
+	return process.env.DEBUG === 'true' || process.env.DEBUG === '1';
+}
+
+/**
+ * Display an error to the user with optional stack trace in debug mode
+ * Handles both TaskMasterError instances and regular errors
+ *
+ * @param error - The error to display
+ * @param options - Display options
+ */
+export function displayError(
+	error: any,
+	options: {
+		/** Skip exit, useful when caller wants to handle exit */
+		skipExit?: boolean;
+		/** Force show stack trace regardless of debug mode */
+		forceStack?: boolean;
+	} = {}
+): void {
+	// Check if it's a TaskMasterError with sanitized details
+	if (error?.getSanitizedDetails) {
+		const sanitized = error.getSanitizedDetails();
+		console.error(chalk.red(`\n${sanitized.message}`));
+
+		// Show stack trace in debug mode or if forced
+		if ((isDebugMode() || options.forceStack) && error.stack) {
+			console.error(chalk.gray('\nStack trace:'));
+			console.error(chalk.gray(error.stack));
+		}
+	} else {
+		// For other errors, show the message
+		const message = error?.message ?? String(error);
+		console.error(chalk.red(`\nError: ${message}`));
+
+		// Show stack trace in debug mode or if forced
+		if ((isDebugMode() || options.forceStack) && error?.stack) {
+			console.error(chalk.gray('\nStack trace:'));
+			console.error(chalk.gray(error.stack));
+		}
+	}
+
+	// Exit if not skipped
+	if (!options.skipExit) {
+		process.exit(1);
+	}
+}