async teardown and .grunt removal, closes #58

package.json

@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "grunt-lib-phantomjs": "~0.3.0",
-    "rimraf": "~2.0.3"
+    "rimraf": "~2.1.4"
   },
   "devDependencies": {
     "grunt-contrib-internal": "~0.4.0",

tasks/jasmine.js

@@ -68,8 +68,9 @@ module.exports = function(grunt) {
       else grunt.log.error(status.failed + ' failures');
 
       options.keepRunner = options.keepRunner || !success;
-      teardown(options);
-      done(success);
+      teardown(options, function(){
+        done(success);
+      });
     });
 
   });
@@ -99,12 +100,12 @@ module.exports = function(grunt) {
     });
   }
 
-  function teardown(options) {
-    if (!options.keepRunner && fs.statSync(options.outfile).isFile()) fs.unlink(options.outfile);
-    if (!options.keepRunner) jasmine.cleanTemp();
-
+  function teardown(options, cb) {
     phantomjs.removeAllListeners();
     phantomjs.listenersAny().length = 0;
+
+    if (!options.keepRunner && fs.statSync(options.outfile).isFile()) fs.unlink(options.outfile);
+    if (!options.keepRunner) jasmine.cleanTemp(cb);
   }
 
   function setup(options) {

tasks/lib/jasmine.js

@@ -24,8 +24,11 @@ exports.init = function(grunt, phantomjs) {
     grunt.file.copy(src, file);
   };
 
-  exports.cleanTemp = function() {
-    rimraf.sync(tempDir);
+  exports.cleanTemp = function(cb) {
+    rimraf(tempDir, function(){
+      // if this fails, then ./.grunt isn't empty and that's ok.
+      fs.rmdir('.grunt', cb);
+    });
   };
 
   exports.buildSpecrunner = function (src, options){