refactor: enhance source map handling and file name resolution

- Add support for `sourceMapBaseUrl` in sourcemap configuration.
- Use `path.basename` for consistent source map file names across utilities.

Author: z0ffy

src/index.ts

@@ -108,10 +108,13 @@ export default function viteBundleObfuscator(config?: Partial<Config>): PluginOp
   const configResolvedHandler: (resolvedConfig: ResolvedConfig) => void | Promise<void> = (resolvedConfig) => {
     const sourcemap = resolvedConfig.build.sourcemap;
     if (sourcemap) {
+      const output = resolvedConfig.build.rollupOptions?.output;
+      const sourcemapBaseUrl = !isArray(output) ? output?.sourcemapBaseUrl : undefined;
       finalConfig.options = {
         ...finalConfig.options,
         sourceMap: true,
         sourceMapMode: sourcemap === 'inline' ? 'inline' : 'separate',
+        ...(sourcemapBaseUrl && { sourceMapBaseUrl: sourcemapBaseUrl }),
       };
     }
   };

src/utils/index.ts

@@ -179,7 +179,7 @@ export function obfuscateBundle(finalConfig: Config, fileName: string, bundleIte
     ? {
         ...finalConfig.options,
         inputFileName: fileName,
-        sourceMapFileName: `${fileName}.map`,
+        sourceMapFileName: `${path.basename(fileName)}.map`,
       }
     : finalConfig.options;
   const obfuscated = javascriptObfuscator.obfuscate(bundleItem.code, fileSpecificOptions);
@@ -212,7 +212,7 @@ export function obfuscateLibBundle(finalConfig: Config, fileName: string, code:
     ? {
         ...finalConfig.options,
         inputFileName: fileName,
-        sourceMapFileName: `${fileName}.map`,
+        sourceMapFileName: `${path.basename(fileName)}.map`,
       }
     : finalConfig.options;
   const obfuscated = javascriptObfuscator.obfuscate(code, fileSpecificOptions);

src/worker/index.ts

@@ -1,4 +1,5 @@
 import { parentPort } from 'node:worker_threads';
+import path from 'node:path';
 import javascriptObfuscator, { ObfuscatorOptions } from 'javascript-obfuscator';
 import { composeSourcemaps, Log, ObfuscatedFilesRegistry } from '../utils';
 import type { ObfuscationResult, WorkerMessage } from '../type';
@@ -28,7 +29,7 @@ if (parentPort) {
         ? {
             ...message.config.options,
             inputFileName: fileName,
-            sourceMapFileName: `${fileName}.map`,
+            sourceMapFileName: `${path.basename(fileName)}.map`,
           }
         : message.config.options;
       const obfuscated = javascriptObfuscator.obfuscate(bundleItem.code, fileSpecificOptions);