Locally developping GAS projects more easily.
With Gasp command automatically create a new node.js project including package.json and gitignore files, a sub-folder called gas that'll content all scripts you gonna to write. In addition there are in the package.json file script commands to quickly deploy 3 types of project : dev, qa or prod.
npm install -g gasp-cli
gasp create [project-name] [script-id]
To retrieve the id of a gas project, just go to https://script.google.com, open the project and in the project settings tab, click on the "copy" button just at below the id.
For more information about clasp command please check the documentation.