JS: Address flakiness with setting copying a Firefox profile

The third-party package used to copy a template Firefox profile would
somtimes fail to copy all of the files in a directory. This would yield
an incomplete profile causing the FirefoxDriver to fail to initialize
properly (up to 10% failrue rate on OS X 10.9.4 with node 0.10.x). This
change removes the problematic dependency infavor of a simple,
synchronous, recursive copy. At some point I will revisit this change to
support fully asynchronous copying.

javascript/node/selenium-webdriver/CHANGES.md

@@ -1,3 +1,8 @@
+## v2.43.1
+
+* Fixed an issue with flakiness when setting up the Firefox profile that could
+    prevent the driver from initializing properly.
+
 ## v2.43.0
 
 * Added native support for Firefox - the Java Selenium server is no longer

javascript/node/selenium-webdriver/io/index.js

@@ -14,7 +14,6 @@
 // limitations under the License.
 
 var fs = require('fs'),
-    ncp = require('ncp').ncp,
     path = require('path'),
     tmp = require('tmp');
 
@@ -24,25 +23,6 @@ var promise = require('..').promise;
 var PATH_SEPARATOR = process.platform === 'win32' ? ';' : ':';
 
 
-/**
- * Creates the specified directory and any necessary parent directories. No
- * action is taken if the directory already exists.
- * @param {string} dir The directory to create.
- * @param {function(Error)} callback Callback function; accepts a single error
- *     or {@code null}.
- */
-function createDirectories(dir, callback) {
-  fs.mkdir(dir, function(err) {
-    if (!err || err.code === 'EEXIST') {
-      callback();
-    } else {
-      createDirectories(path.dirname(dir), function(err) {
-        err && callback(err) || fs.mkdir(dir, callback);
-      });
-    }
-  });
-};
-
 // PUBLIC API
 
 
@@ -89,11 +69,38 @@ exports.copyDir = function(src, dst, opt_exclude) {
     };
   }
 
-  var copied = promise.defer();
-  ncp(src, dst, {filter: predicate}, function(err) {
-    err && copied.reject(err) || copied.fulfill(dst);
+  // TODO(jleyba): Make this function completely async.
+  if (!fs.existsSync(dst)) {
+    fs.mkdirSync(dst);
+  }
+
+  var files = fs.readdirSync(src);
+  files = files.map(function(file) {
+    return path.join(src, file);
+  });
+
+  if (predicate) {
+    files = files.filter(predicate);
+  }
+
+  var results = [];
+  files.forEach(function(file) {
+    var stats = fs.statSync(file);
+    var target = path.join(dst, path.basename(file));
+
+    if (stats.isDirectory()) {
+      if (!fs.existsSync(target)) {
+        fs.mkdirSync(target, stats.mode);
+      }
+      results.push(exports.copyDir(file, target, predicate));
+    } else {
+      results.push(exports.copy(file, target));
+    }
+  });
+
+  return promise.all(results).then(function() {
+    return dst;
   });
-  return copied.promise;
 };
 
 

javascript/node/selenium-webdriver/package.json

@@ -1,6 +1,6 @@
 {
     "name": "selenium-webdriver",
-    "version": "2.43.0",
+    "version": "2.43.1",
     "description": "The official WebDriver JavaScript bindings from the Selenium project",
     "keywords": [
         "automation",
@@ -23,7 +23,6 @@
     },
     "dependencies": {
         "adm-zip": "0.4.4",
-        "ncp": "0.6.0",
         "tmp": "0.0.24",
         "xml2js": "0.4.4"
     },