Adds create-changelog script to recreate entire changelog based on js…

…on files in .changes/ directory. Modified update-changelog script to use markdown syntax rather than HTMl, and changed to use parseInt to convert numeric strings to numbers.

scripts/create-changelog

@@ -0,0 +1,43 @@
+#!/usr/bin/env node
+
+var fs = require('fs');
+
+try {
+	var changeFiles = fs.readdirSync(process.cwd() + '/.changes');
+} catch (err) {
+	if (err.code === 'ENOENT') {
+		err.message += '. Make sure to run from sdk root directory';
+	}
+	throw err;
+}
+
+var updateScript = process.cwd() + '/scripts/update-changelog';
+var changelogFile = process.cwd() + '/CHANGELOG.md';
+
+var startContent = '# Changelog for AWS SDK for JavaScript\
+\n<!--LATEST=0.0.0-->\
+\n<!--ENTRYINSERT-->'
+
+fs.writeFileSync(changelogFile, startContent);
+
+var fileReg = /^(\d*)\.(\d*)\.(\d*)\.json$/;
+
+changeFiles
+	.map(function(file) { return file.match(fileReg); })
+	.filter(function(version) { return !!version; })
+	.sort(function(v1, v2) {
+		var diff;
+		for (var i = 1; i <= 3; i++) {
+			diff = v1[i] - v2[i];
+			if (diff !== 0) {
+				return diff;
+			}
+		}
+		return 0;
+	})
+	.map(function(version) { return version.slice(1).join('.'); })
+	.forEach(function(version) {
+		process.argv[2] = version;
+		delete require.cache[updateScript];
+		require(updateScript);
+	});

scripts/update-changelog

@@ -18,9 +18,9 @@ try {
 }
 
 var latest = changelog.match(versionMarkerReg);
-var lmajor = +latest[1];
-var lminor = +latest[2];
-var lpatch = +latest[3];
+var lmajor = parseInt(latest[1], 10);
+var lminor = parseInt(latest[2], 10);
+var lpatch = parseInt(latest[3], 10);
 
 var version = process.argv[2];
 if (version !== undefined) {
@@ -32,9 +32,9 @@ if (version !== undefined) {
 		version = version.match(new RegExp('^' + versionRegStr + '$'));
 		if (version) {
 			// convert to num for comparison and for normalizing leading zeros
-			var major = +version[1];
-			var minor = +version[2];
-			var patch = +version[3];
+			var major = parseInt(version[1], 10);
+			var minor = parseInt(version[2], 10);
+			var patch = parseInt(version[3], 10);
 			if (major < lmajor ||
 				major == lmajor && minor < lminor ||
 				major == lmajor && minor == lminor && patch <= lpatch) {
@@ -58,18 +58,16 @@ if (!Array.isArray(changes)) {
 	throw new Error('json not in correct format');
 }
 
-var entry = '\n\n## ' + version + '\n<ul>';
+var entry = '\n\n## ' + version;
 
 changes.forEach(function(change) {
 	if (!change.type || !change.category || !change.description) {
 		throw new Error('json not in correct format');
 	}
-	entry += '\n\t<li>' + change.type + ': ' + change.category + ': ' +
-		change.description + '</li>';
+	entry += '\n* ' + change.type + ': ' + change.category + ': ' +
+		change.description;
 });
 
-entry += '\n</ul>';
-
 var logParts = changelog.split(insertMarker);
 logParts[0] = logParts[0]
 	.replace(versionMarkerReg, versionMarker.join(version)) + insertMarker;