@bem/sdk.config/lib/merge.js

Config module for bem-tools

'use strict';

var mergeWith = require('lodash.mergewith');

/**
 * Merge all arguments to firt one.
 * Consider arrays as simple value and not deep merge them.
 * @param {Array|Object} configs - array of configs or positional arguments
 * @return {Object}
 */
module.exports = function merge(configs) {
    var args = Array.isArray(configs) ? configs : Array.from(arguments);
    args.push(function(objValue, srcValue) {
        if (Array.isArray(objValue)) { return srcValue; }
    });
    return mergeWith.apply(null, args);
};