rollup-plugin-node-license

When you're bundling your app, you should be including license information inside those bundles. This module assumes you are using NPM modules. If it detects a node_module was loaded at any point during bundling, it will check its package information and will confirm the license using License Checker. License comments are then appended to the generated bundle.

How to use

Load the plugin into your Rollup configuration.

let license = require('rollup-plugin-node-license');

rollup({
    ...
    plugins: [
        license({
            // Format of the injected license comment(s).
            // Options: "jsdoc" (default), or "table".
            format: 'jsdoc'
        })
    ]
});

With rollup-plugin-terser, the following step is not needed. If you're using rollup-plugin-uglify, you should apply the following rule so that the licenses are not removed:

uglify({
    output: {
        comments: (node, comment) => {
            if (comment.type === 'comment2') {
                return /^\!/i.test(comment.value);
            }
        }
    }
});

After a build, you'll see the license comments at the top of the bundle.