I have node.js CLI app which needs to execute rsync from inside of my app codebase. Here is the structure:

```
.
├── app.js
└── rsync
    └── mac
        └── rsync

```

The app is installed globally so it can be run from any folder. I need to find out how to execute rsync which is located inside of my app codebase. To do so I need to find out the app absolute path.