Merge branch 'playbook-skip-tags' of git://github.com/dekked/ansible into skip_tags

lib/ansible/playbook/__init__.py

@@ -63,6 +63,7 @@ class PlayBook(object):
         sudo_user        = C.DEFAULT_SUDO_USER,
         extra_vars       = None,
         only_tags        = None,
+        skip_tags        = None,
         subset           = C.DEFAULT_SUBSET,
         inventory        = None,
         check            = False,
@@ -97,6 +98,8 @@ class PlayBook(object):
             extra_vars = {}
         if only_tags is None:
             only_tags = [ 'all' ]
+        if skip_tags is None:
+            skip_tags = []
 
         self.check            = check
         self.diff             = diff
@@ -117,6 +120,7 @@ class PlayBook(object):
         self.global_vars      = {}
         self.private_key_file = private_key_file
         self.only_tags        = only_tags
+        self.skip_tags        = skip_tags
         self.any_errors_fatal = any_errors_fatal
 
         self.callbacks.playbook = self
@@ -216,11 +220,14 @@ class PlayBook(object):
         for (play_ds, play_basedir) in zip(self.playbook, self.play_basedirs):
             play = Play(self, play_ds, play_basedir)
             assert play is not None
-            
+
             matched_tags, unmatched_tags = play.compare_tags(self.only_tags)
             matched_tags_all = matched_tags_all | matched_tags
             unmatched_tags_all = unmatched_tags_all | unmatched_tags
 
+            # Remove tasks we wish to skip
+            matched_tags = matched_tags - set(self.skip_tags)
+
             # if we have matched_tags, the play must be run.
             # if the play contains no tasks, assume we just want to gather facts
             # in this case there are actually 3 meta tasks (handler flushes) not 0
@@ -228,9 +235,11 @@ class PlayBook(object):
             if (len(matched_tags) > 0 or len(play.tasks()) == 3):
                 plays.append(play)
 
-        # if the playbook is invoked with --tags that don't exist at all in the playbooks
-        # then we need to raise an error so that the user can correct the arguments.
-        unknown_tags = set(self.only_tags) - (matched_tags_all | unmatched_tags_all)
+        # if the playbook is invoked with --tags or --skip-tags that don't
+        # exist at all in the playbooks then we need to raise an error so that
+        # the user can correct the arguments.
+        unknown_tags = ((set(self.only_tags) | set(self.skip_tags)) -
+                        (matched_tags_all | unmatched_tags_all))
         unknown_tags.discard('all')
 
         if len(unknown_tags) > 0:
@@ -331,7 +340,7 @@ class PlayBook(object):
             ansible.callbacks.set_task(self.callbacks, None)
             ansible.callbacks.set_task(self.runner_callbacks, None)
             return True
-        
+
         # load up an appropriate ansible runner to run the task in parallel
         results = self._run_task_internal(task)
 
@@ -340,7 +349,7 @@ class PlayBook(object):
         if results is None:
             hosts_remaining = False
             results = {}
- 
+
         contacted = results.get('contacted', {})
         self.stats.compute(results, ignore_errors=task.ignore_errors)
 
@@ -408,7 +417,7 @@ class PlayBook(object):
 
         self.callbacks.on_setup()
         self.inventory.restrict_to(host_list)
-        
+
         ansible.callbacks.set_task(self.callbacks, None)
         ansible.callbacks.set_task(self.runner_callbacks, None)
 
@@ -438,10 +447,10 @@ class PlayBook(object):
 
     def generate_retry_inventory(self, replay_hosts):
         '''
-        called by /usr/bin/ansible when a playbook run fails. It generates a inventory 
+        called by /usr/bin/ansible when a playbook run fails. It generates a inventory
         that allows re-running on ONLY the failed hosts.  This may duplicate some
         variable information in group_vars/host_vars but that is ok, and expected.
-        ''' 
+        '''
 
         buf = StringIO.StringIO()
         for x in replay_hosts:
@@ -507,7 +516,7 @@ class PlayBook(object):
 
                     # meta tasks are an internalism and are not valid for end-user playbook usage
                     # here a meta task is a placeholder that signals handlers should be run
- 
+
                     if task.meta == 'flush_handlers':
                         for handler in play.handlers():
                             if len(handler.notified_by) > 0:
@@ -530,11 +539,17 @@ class PlayBook(object):
                 for x in self.only_tags:
 
                     for y in task.tags:
-                        if (x==y):
+                        if x == y:
                             should_run = True
                             break
 
+                # Check for tags that we need to skip
                 if should_run:
+                    if any(x in task.tags for x in self.skip_tags):
+                        should_run = False
+
+                if should_run:
+
                     if not self._run_task(play, task, False):
                         # whether no hosts matched is fatal or not depends if it was on the initial step.
                         # if we got exactly no hosts on the first step (setup!) then the host group