System Info

  System:
    OS: Windows 11 10.0.22631
    CPU: (32) x64 13th Gen Intel(R) Core(TM) i9-13900KF
    Memory: 56.92 GB / 95.85 GB
  Binaries:
    Node: 23.5.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.22 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 9.6.6 - ~\AppData\Roaming\npm\npm.CMD
    pnpm: 8.15.4 - ~\AppData\Roaming\npm\pnpm.CMD
    bun: 1.1.2 - ~\.bun\bin\bun.EXE
  Browsers:
    Edge: Chromium (127.0.2651.74)
    Internet Explorer: 11.0.22621.3527
  npmPackages:
    @rspack/cli: ^1.1.8 => 1.1.8
    @rspack/core: ^1.1.8 => 1.1.8

Details

When optimization.concatenateModules is set to true in Rspack, the webpack-license-plugin generates an empty license file instead of outputting the licenses of dependencies. However, it works correctly with Webpack using the exact same configuration.

Reproduce link

https://github.com/Robot-Inventor/rspack-webpack-license-plugin

Reproduce Steps

1. Run pnpm run build
2. With Webpack, the webpack-license-plugin correctly generates ./webpack-dist/oss-licenses.json. However, with Rspack, it generates an empty JSON file at ./rspack-dist/oss-licenses.json.
3. When optimization.concatenateModules is set to false, the webpack-license-plugin generates the correct JSON with Rspack just as it does with Webpack. However, this results in an increase in the script bundle size.