Merge pull request webpack#8565 from NaviMarella/ProfilingPlugin_8503

Fixed error in Profiling Plugin, if given folder path doesn't exist.

Author: sokra

lib/debug/ProfilingPlugin.js

@@ -1,4 +1,6 @@
 const fs = require("fs");
+const path = require("path");
+const mkdirp = require("mkdirp");
 const { Tracer } = require("chrome-trace-event");
 const validateOptions = require("schema-utils");
 const schema = require("../../schemas/plugins/debug/ProfilingPlugin.json");
@@ -93,6 +95,10 @@ const createTrace = outputPath => {
 		noStream: true
 	});
 	const profiler = new Profiler(inspector);
+	if (/\/|\\/.test(outputPath)) {
+		const dirPath = path.dirname(outputPath);
+		mkdirp.sync(dirPath);
+	}
 	const fsStream = fs.createWriteStream(outputPath);
 
 	let counter = 0;

test/ProfilingPlugin.test.js

@@ -0,0 +1,30 @@
+"use strict";
+
+const path = require("path");
+const fs = require("fs");
+const webpack = require("../");
+const rimraf = require("rimraf");
+
+describe("Profiling Plugin", function() {
+	it("should handle output path with folder creation", done => {
+		const finalPath = "test/js/profilingPath/events.json";
+		const outputPath = path.join(__dirname, "/js/profilingPath");
+		rimraf(outputPath, () => {
+			const compiler = webpack({
+				context: "/",
+				entry: "./fixtures/a.js",
+				plugins: [
+					new webpack.debug.ProfilingPlugin({
+						outputPath: finalPath
+					})
+				]
+			});
+			compiler.run(err => {
+				if (err) return done(err);
+				if (!fs.existsSync(outputPath))
+					return done(new Error("Folder should be created."));
+				done();
+			});
+		});
+	});
+});