feat: support sourcemap config

Author: Sunny-117

src/builders/bundle.ts

@@ -448,6 +448,12 @@ export async function rolldownBuild(
       footer: resolveChunkAddon(entry.footer, format),
     }
 
+    // Enable source maps if requested on the entry
+    if (entry.sourcemap !== undefined) {
+      // Rollup/Rolldown supports boolean | 'inline' | 'hidden'
+      ;(outConfig as any).sourcemap = entry.sourcemap as any
+    }
+
     await hooks.rolldownOutput?.(outConfig, res, ctx)
 
     const { output } = await res.write(outConfig)
@@ -498,6 +504,16 @@ export async function rolldownBuild(
         const { rename } = await import('node:fs/promises')
         await rename(finalFilePath, hashedFilePath)
 
+        // Also rename source map file if it exists (when sourcemap emitted as separate file)
+        try {
+          const mapOld = `${finalFilePath}.map`
+          const mapNew = `${hashedFilePath}.map`
+          await rename(mapOld, mapNew)
+        }
+        catch {
+          // ignore if no map file
+        }
+
         finalFileName = hashedFileName
         finalFilePath = hashedFilePath
       }

src/features/migration.ts

@@ -112,7 +112,8 @@ export async function migrateFromTsup(configPath: string, configContent?: string
     }
 
     if (tsupConfig.sourcemap) {
-      warnings.push('Source maps are not yet supported in robuild')
+      // Source map support is available; preserve the configuration where possible.
+      // We don't warn anymore.
     }
 
     return { config, warnings, suggestions }
@@ -206,38 +207,31 @@ export async function migrateFromUnbuild(configPath: string, configContent?: str
 /**
  * Migrate from Vite library mode configuration
  */
-export async function migrateFromViteLib(configPath: string): Promise<MigrationResult> {
+export async function migrateFromViteLib(_configPath: string): Promise<MigrationResult> {
   const warnings: string[] = []
   const suggestions: string[] = []
 
-  try {
-    const content = await readFile(configPath, 'utf-8')
-
-    // This is a simplified implementation
-    // In practice, you'd need to parse the Vite config more carefully
-    warnings.push('Vite config migration requires manual review')
-    suggestions.push('Use the fromVite option in robuild for automatic Vite config loading')
-
-    const config: BuildConfig = {
-      entries: [{
-        type: 'bundle',
-        input: 'src/index.ts',
-        format: ['esm', 'cjs'],
-        dts: true,
-      }],
-    }
+  // This is a simplified implementation
+  // In practice, you'd need to parse the Vite config more carefully
+  warnings.push('Vite config migration requires manual review')
+  suggestions.push('Use the fromVite option in robuild for automatic Vite config loading')
 
-    return { config, warnings, suggestions }
-  }
-  catch (error) {
-    throw new Error(`Failed to migrate Vite config: ${error}`)
+  const config: BuildConfig = {
+    entries: [{
+      type: 'bundle',
+      input: 'src/index.ts',
+      format: ['esm', 'cjs'],
+      dts: true,
+    }],
   }
+
+  return { config, warnings, suggestions }
 }
 
 /**
  * Migrate from webpack configuration
  */
-export async function migrateFromWebpack(configPath: string): Promise<MigrationResult> {
+export async function migrateFromWebpack(_configPath: string): Promise<MigrationResult> {
   const warnings: string[] = []
   const suggestions: string[] = []
 

src/types.ts

@@ -191,6 +191,15 @@ export interface _BuildEntry {
    */
   define?: Record<string, string>
 
+  /**
+   * Generate source maps for built files.
+   *
+   * - `true` - emit separate `.map` files
+   * - `'inline'` - embed source maps in generated files
+   * - `'hidden'` - emit map files but do not add sourceMappingURL comment
+   */
+  sourcemap?: boolean | 'inline' | 'hidden' | Record<string, any>
+
   /**
    * External dependencies that should not be bundled.
    */
@@ -463,6 +472,15 @@ export interface BuildConfig {
   entries?: (BuildEntry | string)[]
   hooks?: BuildHooks
   watch?: WatchOptions
+  /**
+   * Output directory for builds.
+   */
+  outDir?: string
+
+  /**
+   * Clean output directory before build.
+   */
+  clean?: boolean | string[]
 
   /**
    * Plugins to use during build

test/enterprise.test.ts

@@ -303,7 +303,7 @@ describe('enterprise Features', () => {
       const result = await migrateFromTsup('tsup.config.json', configContent)
 
       expect(result.warnings).toContain('Code splitting is not directly supported, consider using multiple entries')
-      expect(result.warnings).toContain('Source maps are not yet supported in robuild')
+      expect(result.warnings).not.toContain('Source maps are not yet supported in robuild')
       expect(result.suggestions).toContain('Tree shaking is enabled by default in robuild')
     })
   })