Libraries & Licenses

Sometimes, we need to get license list for all used libraries. This is particularly important business.

In our case, we have Rails application with React frontend.

Rails

You can get list of all loaded gems with specs:

Gem.loaded_specs

React (yarn and npm)

Yarn has this ability out of the box.

$ yarn licenses list

You will need to install license-checker for npm:

$ npm install -g license-checker

$ license-checker --csv --out licenses.csv --production