Added plugin/preprocessor support

lib/cli.js

@@ -1,5 +1,5 @@
 var util = require('util');
-var path = require('path')
+var path = require('path');
 var fs = require('fs');
 var webdriver = require('selenium-webdriver');
 var remote = require('selenium-webdriver/remote');
@@ -25,7 +25,7 @@ var config = {
     showColors: true,
     includeStackTrace: true
   }
-}
+};
 
 var originalOnComplete = config.jasmineNodeOpts.onComplete;
 
@@ -59,11 +59,57 @@ var printVersion = function () {
   process.exit(0);
 };
 
+var requirePlugin = function(name) {
+  util.puts('Loading plugin: ' + name);
+  try {
+    return require(name);
+  } catch (e) {
+    if (e.code === 'MODULE_NOT_FOUND' && e.message.indexOf(name) !== -1) {
+      throw new Error('Cannot find plugin: ' + name);
+    } else {
+      throw new Error('Error during loading ' + name + ' plugin: ' + e.message);
+    }
+  }
+};
+
+var preprocess = function (originalPath, preprocessors) {
+  var env = process.env;
+  var tmp = env.TMPDIR || env.TMP || env.TEMP || '/tmp';
+  var contentPath = tmp + '/'  + path.basename(originalPath) + '.js';
+
+  var nextPreprocessor = function(content) {
+    if (!preprocessors.length) {
+      return fs.writeFileSync(contentPath, content);
+    }
+
+    preprocessors.shift()(originalPath, content, nextPreprocessor);
+  };
+
+  nextPreprocessor(fs.readFileSync(originalPath).toString());
+
+  return contentPath;
+};
+
 var run = function() {
   if (config.jasmineNodeOpts.specFolders) {
     throw new Error('Using config.jasmineNodeOpts.specFolders is deprecated ' +
         'in Protractor 0.6.0. Please switch to config.specs.');
   }
+
+  var plugins = [];
+  var preprocessors = [];
+  if (config.plugins) {
+    plugins = config.plugins;
+    for (var i = 0; i < plugins.length; ++i) {
+      var plugin = requirePlugin(plugins[i]);
+      for (key in plugin) {
+        if (key.substring(0, 13) == "preprocessor:") {
+          preprocessors.push(plugin[key]);
+        }
+      }
+    }
+  }
+
   // Check the specs.
   // TODO(ralphj): Interpret patterns from the specs, e.g.
   // 'specs/*.js'
@@ -74,7 +120,10 @@ var run = function() {
     if (!fs.existsSync(specs[i])) {
       throw new Error('Test file ' + specs[i] + ' not found.');
     }
+
+    specs[i] = preprocess(specs[i], preprocessors);
   }
+
   minijn.addSpecs(specs);
 
   if (config.sauceUser && config.sauceKey) {