Added --skip-tags option to ansible-playbook.

bin/ansible-playbook

@@ -65,6 +65,8 @@ def main(args):
         help="set additional key=value variables from the CLI")
     parser.add_option('-t', '--tags', dest='tags', default='all',
         help="only run plays and tasks tagged with these values")
+    parser.add_option('--skip-tags', dest='skip_tags',
+        help="only run plays and tasks whose tags do not match these values")
     parser.add_option('--syntax-check', dest='syntax', action='store_true',
         help="perform a syntax check on the playbook, but do not execute it")
     parser.add_option('--list-tasks', dest='listtasks', action='store_true',
@@ -97,6 +99,9 @@ def main(args):
     else:
         extra_vars = utils.parse_kv(options.extra_vars)
     only_tags = options.tags.split(",")
+    skip_tags = options.skip_tags
+    if options.skip_tags is not None:
+        skip_tags = options.skip_tags.split(",")
 
     for playbook in args:
         if not os.path.exists(playbook):
@@ -136,6 +141,7 @@ def main(args):
             extra_vars=extra_vars,
             private_key_file=options.private_key_file,
             only_tags=only_tags,
+            skip_tags=skip_tags,
             check=options.check,
             diff=options.diff
         )
@@ -156,13 +162,20 @@ def main(args):
                         print '    %s' % host
                 if options.listtasks:
                     matched_tags, unmatched_tags = play.compare_tags(pb.only_tags)
+
+                    # Remove skipped tasks
+                    matched_tags = matched_tags - set(pb.skip_tags)
+
                     unmatched_tags.discard('all')
-                    unknown_tags = set(pb.only_tags) - (matched_tags | unmatched_tags)
+                    unknown_tags = ((set(pb.only_tags) | set(pb.skip_tags)) -
+                                    (matched_tags | unmatched_tags))
+
                     if unknown_tags:
                         continue
                     print '  play #%d (%s): task count=%d' % (playnum, label, len(play.tasks()))
                     for task in play.tasks():
-                        if set(task.tags).intersection(pb.only_tags):
+                        if (set(task.tags).intersection(pb.only_tags) and not
+                            set(task.tags).intersection(pb.skip_tags)):
                             if getattr(task, 'name', None) is not None:
                                 # meta tasks have no names
                                 print '    %s' % task.name

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
@@ -221,6 +225,9 @@ class PlayBook(object):
             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:
@@ -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