Summary

This PR addresses the challenge of splitting concatenated modules. Since concatenated modules aggregate multiple modules into a single closure, the previous bundle parsing approach could not accurately decompose them. This update leverages source maps to correctly split and identify individual modules within concatenated modules.

Source Map Handling

• Introduced hooks in ensureModulesChunkGraph.ts to collect and process source maps during both compilation and emission stages.
• Added sourcemapTool.ts to provide compatibility for splitting modules in both webpack and rspack environments.
• Implemented utility functions such as ensureDevtools and emitHandler for validating and managing source map–related operations.

Tasks

• The Rspack afterEmit hook generates sourcemapModuleSets
• The Webpack emit hook generates sourcemapModuleSets
• Compatible with legacy bundle parsing logic
• UT

Dependency Updates

• Added source-map-js as a new dependency in package.json to enhance source map support.

Related Links

#1170