chore: move to tsdown (#1211)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

packages/build-config/package.json

@@ -3,12 +3,12 @@
 	"version": "1.0.0",
 	"description": "Shared build configuration for Task Master monorepo",
 	"type": "module",
-	"main": "./dist/tsup.base.js",
-	"types": "./dist/tsup.base.d.ts",
+	"main": "./dist/tsdown.base.js",
+	"types": "./src/tsdown.base.ts",
 	"exports": {
 		".": {
-			"types": "./dist/tsup.base.d.ts",
-			"import": "./dist/tsup.base.js"
+			"types": "./src/tsdown.base.ts",
+			"import": "./dist/tsdown.base.js"
 		}
 	},
 	"files": ["dist", "src"],

packages/build-config/src/tsdown.base.ts

@@ -0,0 +1,46 @@
+/**
+ * Base tsdown configuration for Task Master monorepo
+ * Provides shared configuration that can be extended by individual packages
+ */
+import type { UserConfig } from 'tsdown';
+
+const isProduction = process.env.NODE_ENV === 'production';
+const isDevelopment = !isProduction;
+
+/**
+ * Environment helpers
+ */
+export const env = {
+	isProduction,
+	isDevelopment,
+	NODE_ENV: process.env.NODE_ENV || 'development'
+};
+
+/**
+ * Base tsdown configuration for all packages
+ * Since everything gets bundled into root dist/ anyway, use consistent settings
+ */
+export const baseConfig: Partial<UserConfig> = {
+	sourcemap: isDevelopment,
+	format: 'esm',
+	platform: 'node',
+	dts: isDevelopment,
+	minify: isProduction,
+	treeshake: isProduction,
+	// Keep all npm dependencies external (available via node_modules)
+	external: [/^[^@./]/, /^@(?!tm\/)/]
+};
+
+/**
+ * Utility function to merge configurations
+ * Simplified for tsdown usage
+ */
+export function mergeConfig(
+	base: Partial<UserConfig>,
+	overrides: Partial<UserConfig>
+): Partial<UserConfig> {
+	return {
+		...base,
+		...overrides
+	};
+}

packages/build-config/src/tsup.base.ts

@@ -1,101 +0,0 @@
-/**
- * Base tsup configuration for Task Master monorepo
- * Provides shared configuration that can be extended by individual packages
- */
-import type { Options } from 'tsup';
-
-const isProduction = process.env.NODE_ENV === 'production';
-const isDevelopment = !isProduction;
-
-/**
- * Environment helpers
- */
-export const env = {
-	isProduction,
-	isDevelopment,
-	NODE_ENV: process.env.NODE_ENV || 'development'
-};
-
-/**
- * Base tsup configuration for all packages
- * Since everything gets bundled into root dist/ anyway, use consistent settings
- */
-export const baseConfig: Partial<Options> = {
-	format: ['esm'],
-	target: 'node18',
-	sourcemap: isDevelopment,
-	clean: true,
-	dts: false,
-	minify: isProduction,
-	treeshake: isProduction,
-	splitting: false,
-	// Don't bundle any other dependencies (auto-external all node_modules)
-	external: [/^[^./]/],
-	esbuildOptions(options) {
-		options.platform = 'node';
-		// Allow importing TypeScript from JavaScript
-		options.resolveExtensions = ['.ts', '.js', '.mjs', '.json'];
-		// Better source mapping in development only
-		options.sourcesContent = isDevelopment;
-		// Keep original names for better debugging in development
-		options.keepNames = isDevelopment;
-	},
-	// Watch mode configuration for development
-	watch: false
-};
-
-/**
- * Legacy external modules list - kept for backwards compatibility
- * Note: When using tsup-node, this is not needed as it automatically
- * excludes dependencies and peerDependencies from package.json
- */
-export const commonExternals = [
-	// Native Node.js modules (for cases where tsup is used instead of tsup-node)
-	'fs',
-	'path',
-	'child_process',
-	'crypto',
-	'os',
-	'url',
-	'util',
-	'stream',
-	'http',
-	'https',
-	'events',
-	'assert',
-	'buffer',
-	'querystring',
-	'readline',
-	'zlib',
-	'tty',
-	'net',
-	'dgram',
-	'dns',
-	'tls',
-	'cluster',
-	'process',
-	'module'
-];
-
-/**
- * Utility function to merge configurations
- * Simplified for tsup-node usage
- */
-export function mergeConfig(
-	baseConfig: Partial<Options>,
-	overrides: Partial<Options>
-): Options {
-	return {
-		...baseConfig,
-		...overrides,
-		// Merge esbuildOptions
-		esbuildOptions(options, context) {
-			if (baseConfig.esbuildOptions) {
-				baseConfig.esbuildOptions(options, context);
-			}
-			if (overrides.esbuildOptions) {
-				overrides.esbuildOptions(options, context);
-			}
-		}
-	} as Options;
-}