Description

As raised through #13270, asset detection for sourcemap upload in Next.js doesn't work on Windows.

After some research we found that it is likely due to the glob library, not allowing \ characters except for escaping and us passing in globs with actual backslashes:

• sentry-javascript/packages/nextjs/src/config/webpackPluginOptions.ts

  Lines 24 to 35 in b17ac59

  	sourcemapUploadAssets.push(
  	path.join(distDirAbsPath, 'server', '**'), // This is normally where Next.js outputs things
  	path.join(distDirAbsPath, 'serverless', '**'), // This was the output location for serverless Next.js
  	);
  	} else {
  	if (sentryBuildOptions.widenClientFileUpload) {
  	sourcemapUploadAssets.push(path.join(distDirAbsPath, 'static', 'chunks', '**'));
  	} else {
  	sourcemapUploadAssets.push(
  	path.join(distDirAbsPath, 'static', 'chunks', 'pages', '**'),
  	path.join(distDirAbsPath, 'static', 'chunks', 'app', '**'),
  	);

• https://github.com/getsentry/sentry-javascript-bundler-plugins/blob/95fe7e0b86a7987d0c162abecc515e7021a387ce/packages/bundler-plugin-core/src/debug-id-upload.ts#L81 (here we should probably use windowsPathsNoEscape in the case we are autodetecting, because we are exclusively passing absolute paths to glob)