-p has been replaced by a required option. Various docs changes.

lib/ansible/constants.py

@@ -19,8 +19,8 @@
 # control side (aka 'overlord')
 DEFAULT_HOST_LIST      = '/etc/ansible/hosts'
 DEFAULT_MODULE_PATH    = '/usr/share/ansible'
-DEFAULT_MODULE_NAME    = 'ping'
-DEFAULT_PATTERN        = '*'
+DEFAULT_MODULE_NAME    = 'command'
+DEFAULT_PATTERN        = None
 DEFAULT_FORKS          = 3
 DEFAULT_MODULE_ARGS    = ''
 DEFAULT_TIMEOUT        = 10

lib/ansible/playbook.py

@@ -151,6 +151,11 @@ class PlayBook(object):
             remote_user=remote_user
         )
         results = runner.run()
+
+        # if no hosts are matched, carry on, unlike /bin/ansible
+        # which would warn you about this
+        if results is None:
+            results = {}
  
         # walk through the results and build up
         # summary information about successes and

lib/ansible/runner.py

@@ -326,7 +326,9 @@ class Runner(object):
         
         # find hosts that match the pattern
         hosts = self.match_hosts(self.pattern)
-        
+        if len(hosts) == 0:
+            return None       
+ 
         # attack pool of hosts in N forks
         # _executor_hook does all of the work
         hosts = [ (self,x) for x in hosts ]