The JavaScript is minified, and there is a lot of it, but technically someone who is really persistent (and perhaps really bored and really needs other hobbies) could try to piece together what it's doing.
src - https://github.com/electron/electron-packager/issues/152#issuecomment-147101936
src - https://github.com/electron/electron-packager/issues/152#issuecomment-147101936