feat: auto open generated html (fixes jantimon#10)

it also fixes jantimon#7, by moving the function call to its constructor. :)

index.js

@@ -1,7 +1,14 @@
-require("./lib/profiler")();
+const profile = require("./lib/profiler");
 let isListeningOnStdin = false;
+const defaultOpts = {
+  profilePath: void 0,
+  open: true // auto open the generated html
+};
 
 module.exports = class CpuProfileWebpackPlugin {
+  constructor(opts) {
+    profile(Object.assign({}, defaultOpts, opts));
+  }
   apply(compiler) {
     compiler.hooks.watchRun.tapAsync(
       "CpuProfileWebpackPlugin",

lib/profiler.js

@@ -1,6 +1,7 @@
 const { readFileSync, writeFileSync } = require("fs");
 const path = require("path");
 const cpuProfiler = require("sync-cpuprofiler");
+const opn = require("open");
 
 /**
  * Extract the package versions from the node require cache
@@ -82,7 +83,8 @@ function getUsedNodeModules() {
   );
 }
 
-function writeProfileFiles(profilePath, options) {
+function writeProfileFiles(options) {
+  const { profilePath, open, ...opts } = options;
   function onProfileDone(profilePath) {
     const profile = readFileSync(profilePath, "utf-8");
     const html = readFileSync(
@@ -97,19 +99,21 @@ function writeProfileFiles(profilePath, options) {
       /* after %~~%profile%~~% before %~~%versions%~~% */ htmlParts[2] +
       versions +
       /* after %~~%versions%~~% */ htmlParts[4];
-    writeFileSync(profilePath + ".html", htmlResult);
+    const htmlPath = profilePath + ".html";
+    writeFileSync(htmlPath, htmlResult);
+    open && opn(htmlPath);
     console.log(
       "⏱️  Profile written to ",
       path.relative(process.cwd(), profilePath + ".html")
     );
   }
 
-  cpuProfiler(profilePath, Object.assign({}, options, { onProfileDone }));
+  cpuProfiler(profilePath, Object.assign({}, opts, { onProfileDone }));
 }
 
-module.exports = (profilePath, options) => {
+module.exports = options => {
   try {
-    return writeProfileFiles(profilePath, options);
+    return writeProfileFiles(options);
   } catch (e) {
     console.log("Writting profile failed", e);
   }

package.json

@@ -16,6 +16,7 @@
     "prepublishOnly": "npm run build"
   },
   "dependencies": {
+    "open": "^7.0.3",
     "sync-cpuprofiler": "1.1.3"
   },
   "peerDependencies": {