fix(nitro): Respect user-provided rewriteSources option

The `rewriteSources` option was hardcoded to `normalizePath`, silently
discarding any custom function provided by the user. Now falls back to
`normalizePath` only when the user doesn't provide their own function,
matching the behavior of other meta-framework SDKs (Nuxt, Next.js).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: logaretm

packages/nitro/src/sourceMaps.ts

@@ -77,7 +77,7 @@ export function getPluginOptions(options?: SentryNitroOptions): BundlerPluginOpt
       assets: options?.sourcemaps?.assets,
       ignore: options?.sourcemaps?.ignore,
       filesToDeleteAfterUpload: options?.sourcemaps?.filesToDeleteAfterUpload ?? ['**/*.map'],
-      rewriteSources: (source: string) => normalizePath(source),
+      rewriteSources: options?.sourcemaps?.rewriteSources ?? ((source: string) => normalizePath(source)),
     },
     release: options?.release,
     bundleSizeOptimizations: options?.bundleSizeOptimizations,

packages/nitro/test/sourceMaps.test.ts

@@ -120,6 +120,15 @@ describe('getPluginOptions', () => {
     expect(rewriteSources?.('src/index.ts', undefined)).toBe('src/index.ts');
   });
 
+  it('uses user-provided rewriteSources when given', () => {
+    const customRewrite = (source: string) => `/custom/${source}`;
+    const options = getPluginOptions({ sourcemaps: { rewriteSources: customRewrite } });
+
+    expect(options.sourcemaps?.rewriteSources?.('../../../src/index.ts', undefined)).toBe(
+      '/custom/../../../src/index.ts',
+    );
+  });
+
   it('always sets metaFramework to nitro', () => {
     const options = getPluginOptions();