Merging json files

README.md

• For merging json file there are lot of packages like "merge-jsons-webpack-plugin" but they restrict the file extension to json.
• But, datatables languages files have .lang extension(symbolic links might be considered but it might be cumbersome or useless effort)
• So, i decided to write it straight forward and come up with this code.
• I take advantage of CopyWebpackPlugin and did not write an extra webpack plugin.

Turkish-Extra.lang

/*
Extra translations for Turkish i.e. select.
*/
{
  "select": {
    "rows": {
      "_": "%d kayıt seçildi",
      "0": "",
      "1": "1 kayıt seçildi"
    }
  }
}

webpack.js

const webpackLib = require("./webpack.lib.js");
plugins: [
  new CopyWebpackPlugin([
  {
      from: 'node_modules/datatables.net-plugins/i18n/Turkish.lang',
      transform: (content, path) => {

          // Load extra language translations.
          const myDataTablesTurkishLang = webpackLib.readJSON("./Scripts/Turkish-Extra.lang");

          var dataTablesTurkishLang = webpackLib.parseJSON(content.toString('utf8'));

          var mergedObj = Object.assign(dataTablesTurkishLang, myDataTablesTurkishLang);
          return JSON.stringify(mergedObj, null, 2);
      },
      to: 'DataTables-Lang/Turkish.json',
  }]),
]

webpack.lib.js

const stripJSONComments = require("strip-json-comments");
const fs = require("fs");

exports.readJSON = (jsonFile) => {
    var data = fs.readFileSync(jsonFile, 'utf8').replace(/^\uFEFF/, '');
    return JSON.parse(stripJSONComments(data));
}

exports.parseJSON = (jsonString) => {
    return JSON.parse(stripJSONComments(jsonString.replace(/^\uFEFF/, '')));
}