Move files from packager/ to local-cli

Summary: public

This is not only to put the files on a place where it makes more sense but also to allow to use ES6 features on them as `/packager` is not whitelisted on `babel`.

Reviewed By: mkonicek

Differential Revision: D2577267

fb-gh-sync-id: b69a17c0aad349a3eda987e33d1778d97a8e1549

local-cli/server/middleware/cpuProfilerMiddleware.js

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const execFile = require('child_process').execFile;
+const fs = require('fs');
+const path = require('path');
+
+module.exports = function(req, res, next) {
+  if (req.url !== '/cpu-profile') {
+    next();
+    return;
+  }
+
+  console.log('Dumping CPU profile information...');
+  var dumpName = '/tmp/cpu-profile_' + Date.now();
+  fs.writeFileSync(dumpName + '.json', req.rawBody);
+
+  var cmdPath = path.join(
+    __dirname,
+    '../react-native-github/JSCLegacyProfiler/json2trace'
+  );
+  execFile(
+    cmdPath,
+    [
+      '-cpuprofiler',
+       dumpName + '.cpuprofile ' + dumpName + '.json'
+    ],
+    function(error) {
+      if (error) {
+        console.error(error);
+        res.end('Unknown error: ' + error.message);
+      } else {
+        var response = 'Your profile was generated at\n\n' + dumpName + '.cpuprofile\n\n' +
+          'Open `Chrome Dev Tools > Profiles > Load` and select the profile to visualize it.';
+        console.log(response);
+        res.end(response);
+      }
+    }
+  );
+};