Convert ESLint airbnb JavaScript config into single file

compact-eslint-airbnb.js

'use strict';

var _ = require('lodash');
var airbnb = require('eslint-config-airbnb');
var yaml = require('js-yaml');

function load(filename) {
    console.log('load file ' + filename);
    return require(filename);
}

function parse(obj) {
    if (obj.hasOwnProperty('extends')) {
        var newObj = _.reduce(obj.extends, function(acc, file) {
            if (_.endsWith(file, 'react.js') || _.endsWith(file, 'react-a11y.js')) {
                return acc;
            }
            return _.defaultsDeep(parse(load(file)), acc);
        }, obj);

        delete newObj.extends;
        obj = newObj;
    }

    return obj;
}

var result = parse(airbnb);

require('fs').writeFileSync('.eslintrc', JSON.stringify(result, null, '  '));

require('fs').writeFileSync('.eslintrc.yml', yaml.safeDump(result, { indent: 2, sortKeys: true }));

console.log('DONE!');

The result is put into another gist: https://gist.github.com/yyscamper/3e1c7e7262231f53c66df8c389b23822