Some attributes of callbacks aren't in v2. Port plugins to the v2 way to do that

Update porting guide with info on callback porting

docsite/rst/porting_guide_2.0.rst

@@ -168,7 +168,33 @@ Action plugins
 Callback plugins
 ----------------
 
-* callback plugins
+Although Ansible 2.0 provides a new callback API the old one continues to work
+for most callback plugins.  However, if your callback plugin makes use of
+:attr:`self.playbook`, :attr:`self.play`, or :attr:`self.task` then you will
+have to store the values for these yourself as ansible no longer automatically
+populates the callback with them.  Here's a short snippet that shows you how::
+
+    from ansible.plugins.callback import CallbackBase
+
+    class CallbackModule(CallbackBase):
+        def __init__(self):
+            self.playbook = None
+            self.play = None
+            self.task = None
+
+        def v2_playbook_on_start(self, playbook):
+            self.playbook = playbook
+
+        def v2_playbook_on_play_start(self, play):
+            self.play = play
+
+        def v2_playbook_on_task_start(self, task, is_conditional):
+            self.task = task
+
+        def v2_on_any(self, *args, **kwargs):
+            self._display.display('%s: %s: %s' % (self.playbook.name,
+            self.play.name, self.task))
+
 
 Connection plugins
 ------------------

lib/ansible/plugins/callback/context_demo.py

@@ -31,8 +31,18 @@ class CallbackModule(CallbackBase):
     CALLBACK_NAME = 'context_demo'
     CALLBACK_NEEDS_WHITELIST = True
 
+    def __init__(self, *args, **kwargs):
+        self.task = None
+        self.play = None
+
     def v2_on_any(self, *args, **kwargs):
         i = 0
+        if self.play:
+            play_str = 'play: %s' % self.play.name
+        if self.task:
+            task_str = 'task: %s' % self.task
+        self._display.display("--- %s %s ---" % (self.play_str, self.task_str))
+
         self._display.display("     --- ARGS ")
         for a in args:
             self._display.display('     %s: %s' % (i, a))
@@ -41,3 +51,9 @@ class CallbackModule(CallbackBase):
         self._display.display("      --- KWARGS ")
         for k in kwargs:
             self._display.display('     %s: %s' % (k, kwargs[k]))
+
+    def v2_playbook_on_play_start(self, play):
+        self.play = play
+
+    def v2_playbook_on_task_start(self, task, is_conditional):
+        self.task = task

lib/ansible/plugins/callback/hipchat.py

@@ -73,6 +73,7 @@ class CallbackModule(CallbackBase):
 
         self.printed_playbook = False
         self.playbook_name = None
+        self.play = None
 
     def send_msg(self, msg, msg_format='text', color='yellow', notify=False):
         """Method for sending a message to HipChat"""
@@ -93,9 +94,11 @@ class CallbackModule(CallbackBase):
             self.display.warning('Could not submit message to hipchat')
 
 
-    def playbook_on_play_start(self, name):
+    def v2_playbook_on_play_start(self, play):
         """Display Playbook and play start messages"""
 
+        self.play = play
+        name = play.name
         # This block sends information about a playbook when it starts
         # The playbook object is not immediately available at
         # playbook_on_start so we grab it via the play