This is jopt-simple 5.0.3. Reproduction:

1. git clone https://github.com/jopt-simple/jopt-simple
2. git checkout jopt-simple-5.0.3 (commithash b52b94611dba126a8236a10277d15676e31ab5f6)
3. Dump the contents of the git tree into third_party/java/jopt-simple
4. Keep the existing, trivial BUILD file
5. Remove the src/test and src/site directories.