add builtAt stats option. use locale string functions

lib/Stats.js

@@ -105,6 +105,7 @@ class Stats {
 		const showEnv = optionOrLocalFallback(options.env, false);
 		const showVersion = optionOrLocalFallback(options.version, true);
 		const showTimings = optionOrLocalFallback(options.timings, true);
+		const showBuiltAt = optionOrLocalFallback(options.builtAt, true);
 		const showAssets = optionOrLocalFallback(options.assets, true);
 		const showEntrypoints = optionOrLocalFallback(options.entrypoints, true);
 		const showChunks = optionOrLocalFallback(options.chunks, !forToString);
@@ -252,6 +253,9 @@ class Stats {
 		if(showHash) obj.hash = this.hash;
 		if(showTimings && this.startTime && this.endTime) {
 			obj.time = this.endTime - this.startTime;
+		}
+
+		if(showBuiltAt && this.endTime) {
 			obj.builtAt = this.endTime;
 		}
 
@@ -618,11 +622,11 @@ class Stats {
 			newline();
 		}
 		if(typeof obj.builtAt === "number") {
-			const now = (new Date(obj.builtAt)).toString().split(" ");
+			const builtAtDate = new Date(obj.builtAt);
 			colors.normal("Built at: ");
-			colors.normal(`${now[0]} ${now[1]} ${now[2]} ${now[3]} `);
-			colors.bold(now[4]);
-			colors.normal(now[6] ? ` ${now[5]} ${now[6]}` : ` ${now[5]}`);
+			colors.normal(builtAtDate.toLocaleDateString());
+			colors.normal(" ");
+			colors.bold(builtAtDate.toLocaleTimeString());
 			newline();
 		}
 		if(obj.env) {

schemas/WebpackOptions.json

@@ -1655,6 +1655,10 @@
               "type": "boolean",
               "description": "add timing information"
             },
+            "builtAt": {
+              "type": "boolean",
+              "description": "add built at time information"
+            },
             "performance": {
               "type": "boolean",
               "description": "add performance hint flags"

test/statsCases/async-commons-chunk-auto/webpack.config.js

@@ -2,6 +2,7 @@ const path = require("path");
 const stats = {
 	hash: false,
 	timings: false,
+	builtAt: false,
 	assets: false,
 	chunks: true,
 	chunkOrigins: true,

test/statsCases/async-commons-chunk/webpack.config.js

@@ -9,6 +9,7 @@ module.exports = {
 	stats: {
 		hash: false,
 		timings: false,
+		builtAt: false,
 		assets: false,
 		chunks: true,
 		chunkOrigins: true,

test/statsCases/circular-correctness/webpack.config.js

@@ -7,6 +7,7 @@ module.exports = {
 	stats: {
 		hash: false,
 		timings: false,
+		builtAt: false,
 		assets: false,
 		chunks: true,
 		chunkModules: true,

test/statsCases/graph-correctness-entries/webpack.config.js

@@ -10,6 +10,7 @@ module.exports = {
 	stats: {
 		hash: false,
 		timings: false,
+		builtAt: false,
 		assets: false,
 		chunks: true,
 		chunkModules: true,

test/statsCases/graph-correctness-modules/webpack.config.js

@@ -10,6 +10,7 @@ module.exports = {
 	stats: {
 		hash: false,
 		timings: false,
+		builtAt: false,
 		assets: false,
 		chunks: true,
 		chunkModules: true,

test/statsCases/module-deduplication-named/webpack.config.js

@@ -11,6 +11,7 @@ module.exports = {
 	stats: {
 		hash: false,
 		timings: false,
+		builtAt: false,
 		chunks: true,
 		chunkModules: true,
 		modules: false

test/statsCases/module-deduplication/webpack.config.js

@@ -11,6 +11,7 @@ module.exports = {
 	stats: {
 		hash: false,
 		timings: false,
+		builtAt: false,
 		chunks: true,
 		chunkModules: true,
 		modules: false

test/statsCases/parse-error/webpack.config.js

@@ -5,6 +5,7 @@ module.exports = {
 	entry: "./index",
 	stats: {
 		timings: false,
+		builtAt: false,
 		hash: false,
 		modules: true,
 		chunks: false

test/statsCases/preset-mixed-array/webpack.config.js

@@ -22,6 +22,7 @@ module.exports = [
 			entrypoints: true,
 			hash: false,
 			timings: false,
+			builtAt: false,
 			chunks: false,
 			assets: false
 		}

test/statsCases/split-chunks/webpack.config.js

@@ -1,6 +1,7 @@
 const stats = {
 	hash: false,
 	timings: false,
+	builtAt: false,
 	assets: false,
 	chunks: true,
 	chunkOrigins: true,