diff-resource-bundle.js

/**
 * Diff Java resource bundles to find missing keys.
 */
var fs = require('fs');

var englishFile = 'path/to/ResourceBundleMessage.properties';
var germanFile = 'path/to/ResourceBundleMessage_de.properties';
var japaneseFile = 'path/to/ResourceBundleMessage_ja.properties';
var chineseFile = 'path/to/ResourceBundleMessage_zh_CN.properties';

var englishKeysAndValues = {};
var germanKeysAndValues = {};
var japaneseKeysAndValues = {};
var chineseKeysAndValues = {};
var englishKeys = null;
var missingKeys = '';
var totalMissingKeys = 0;

var putFileContentsIntoObject = function(fileContents, object){
	//split up the lines
	var fileString = fileContents.toString();
	var linesArray = fileString.split('\n');
	var linesLength = linesArray.length;

	for(var i = 0; i < linesLength; i++){
		var currentLineArray = linesArray[i].split('=', 2);
		
		var trimmedKey = currentLineArray[0] ? currentLineArray[0].trim() : '';
		var trimmedValue = currentLineArray[1] ? currentLineArray[1].trim() : '';
		object[trimmedKey] = trimmedValue;
	}
}

//grab file contents *synchronously* from the various files 
var fileContents = fs.readFileSync(englishFile);
putFileContentsIntoObject(fileContents, englishKeysAndValues);

var fileContents = fs.readFileSync(germanFile);
putFileContentsIntoObject(fileContents, germanKeysAndValues);

var fileContents = fs.readFileSync(japaneseFile);
putFileContentsIntoObject(fileContents, japaneseKeysAndValues);

var fileContents = fs.readFileSync(chineseFile);
putFileContentsIntoObject(fileContents, chineseKeysAndValues);



//go through each of the English keys and find any that are missing from the other files
for(var key in englishKeysAndValues){
	//missingKeys += 'Missing German Keys \r\n';
	if(typeof germanKeysAndValues[key] === 'undefined'){
		missingKeys += 'Missing ' + key + ' from ResourceBundleMessage_de.properties. English version is "' + englishKeysAndValues[key] + '".\r\n';
		totalMissingKeys++;
	}
	
	//missingKeys += 'Missing Japanese Keys \r\n';
	if(typeof japaneseKeysAndValues[key] === 'undefined'){
		missingKeys += 'Missing ' + key + ' from ResourceBundleMessage_ja.properties. English version is "' + englishKeysAndValues[key] + '".\r\n';
		totalMissingKeys++;
	}	
	
	//missingKeys += 'Missing Chinese Keys \r\n';
	if(typeof chineseKeysAndValues[key] === 'undefined'){
		missingKeys += 'Missing ' + key + ' from ResourceBundleMessage_zh_CN.properties. English version is "' + englishKeysAndValues[key] + '".\r\n';
		totalMissingKeys++;
	}
}

fs.writeFileSync('results.txt', missingKeys);

console.log('File results.txt written. Total missing keys: ' + totalMissingKeys);