Issue jakejs#32 Need to manipulate the invocation-chain, not replace it.

lib/jake.js

@@ -47,6 +47,9 @@ jake = new function () {
   // =================
   // Local reference for scopage
   var _this = this
+
+    , _taskIndex = 0
+    , _workingTaskList = []
   // The list of tasks/prerequisites to run, parsed recursively
   // and run bottom-up, so prerequisites run first
     , _taskList = []
@@ -116,7 +119,7 @@ jake = new function () {
               maxTime = (maxTime == null || maxTime < ctime) ? ctime : maxTime;
               if (prereqsLeft == 0) {
                 if (maxTime > stats.ctime) {
-                  _taskList.push(name);
+                  _workingTaskList.push(name);
                 }
                 callback(maxTime);
               }
@@ -129,7 +132,7 @@ jake = new function () {
         else if (err) {
           // File not found
           if (err.errno == 2) {
-            _taskList.push(name);
+            _workingTaskList.push(name);
             callback(new Date());
           }
           // Errors are rethrown.
@@ -204,15 +207,15 @@ jake = new function () {
                 _parseDeps(prereqs[i], subOpts, function () {
                   ctr -= 1;
                   if (ctr == 0) {
-                    _taskList.push(name);
+                    _workingTaskList.push(name);
                     callback(new Date());
                   }
                 });
               }
             }
             // If the task does not have prerequisites, just push it.
             else {
-              _taskList.push(name);
+              _workingTaskList.push(name);
               callback(new Date());
             }
           }
@@ -255,6 +258,12 @@ jake = new function () {
    */
   this.runTask = function (name, args, includeDeps) {
     this.populateAndProcessTaskList(name, includeDeps, function () {
+
+      var args = [_taskIndex, 0];
+      args = args.concat(_workingTaskList);
+      _taskList.splice.apply(_taskList, args);
+      _workingTaskList = [];
+
       if (!_taskList.length) {
         fail('No tasks to run.');
       }
@@ -268,15 +277,20 @@ jake = new function () {
     this.populateAndProcessTaskList(name, includeDeps, function () {
       var name
         , task;
-      if (!_taskList.length) {
+
+      if (!_workingTaskList.length) {
         fail('No tasks to reenable.');
       }
       else {
-        while (name = (_taskList.shift())) {
+        for (var i = 0, ii = _workingTaskList.length; i < ii; i++) {
+          name = _workingTaskList[i];
           task = self.getTask(name);
           task.done = false;
         }
       }
+
+      _workingTaskList = [];
+
     });
   };
 
@@ -321,8 +335,10 @@ jake = new function () {
    * indefinitely
    */
   this.runNextTask = function (args) {
-    var name = _taskList.shift()
-      , task
+    var name = _taskList[_taskIndex]
+      , task;
+
+    _taskIndex++;
     // If there are still tasks to run, do it
     if (name) {
       task = this.getTask(name);