Fixes a dev branch glitch where a conditional could be applied to multiple…

Fixes a dev branch glitch where a conditional could be applied to multiple tasks.  Also improves the errors on parsing bad conditionals to make them less confusing to users.

lib/ansible/playbook/play.py

@@ -401,15 +401,29 @@ class Play(object):
 
     # *************************************************
 
-    def _load_tasks(self, tasks, vars={}, default_vars={}, sudo_vars={}, additional_conditions=[], original_file=None, role_name=None):
+    def _load_tasks(self, tasks, vars=None, default_vars=None, sudo_vars=None, additional_conditions=None, original_file=None, role_name=None):
         ''' handle task and handler include statements '''
 
         results = []
         if tasks is None:
             # support empty handler files, and the like.
             tasks = []
+        if additional_conditions is None:
+            additional_conditions = []
+        if vars is None:
+            vars = {}
+        if default_vars is None:
+            default_vars = {}
+        if sudo_vars is None:
+            sudo_vars = {}
+
+        old_conditions = list(additional_conditions)
 
         for x in tasks:
+
+            # prevent assigning the same conditions to each task on an include
+            included_additional_conditions = list(old_conditions)
+
             if not isinstance(x, dict):
                 raise errors.AnsibleError("expecting dict; got: %s" % x)
 
@@ -490,9 +504,11 @@ class Play(object):
                         for x in data:
                             if 'include' in x:
                                 x['role_name'] = new_role
-                    results += self._load_tasks(data, mv, default_vars, included_sudo_vars, included_additional_conditions, original_file=include_filename, role_name=new_role)
+                    loaded = self._load_tasks(data, mv, default_vars, included_sudo_vars, list(included_additional_conditions), original_file=include_filename, role_name=new_role)
+                    results += loaded
             elif type(x) == dict:
-                results.append(Task(self,x,module_vars=task_vars,default_vars=default_vars,additional_conditions=additional_conditions,role_name=role_name))
+                task = Task(self,x,module_vars=task_vars,default_vars=default_vars,additional_conditions=list(additional_conditions),role_name=role_name)
+                results.append(task)
             else:
                 raise Exception("unexpected task type")
 

lib/ansible/playbook/task.py

@@ -41,7 +41,7 @@ class Task(object):
          'sudo_pass', 'when', 'connection', 'environment', 'args',
          'any_errors_fatal', 'changed_when', 'failed_when', 'always_run', 'delay', 'retries', 'until'
     ]
-    
+
     def __init__(self, play, ds, module_vars=None, default_vars=None, additional_conditions=None, role_name=None):
         ''' constructor loads from a task or handler datastructure '''
 

lib/ansible/utils/__init__.py

@@ -165,6 +165,7 @@ def is_changed(result):
 
 def check_conditional(conditional, basedir, inject, fail_on_undefined=False, jinja2=False):
 
+
     if jinja2:
         conditional = "jinja2_compare %s" % conditional
 
@@ -174,6 +175,7 @@ def check_conditional(conditional, basedir, inject, fail_on_undefined=False, jin
         if conditional in inject and str(inject[conditional]).find('-') == -1:
             conditional = inject[conditional]
         conditional = template.template(basedir, conditional, inject, fail_on_undefined=fail_on_undefined)
+        original = conditional.replace("jinja2_compare ","")
         # a Jinja2 evaluation that results in something Python can eval!
         presented = "{%% if %s %%} True {%% else %%} False {%% endif %%}" % conditional
         conditional = template.template(basedir, presented, inject)
@@ -188,13 +190,13 @@ def check_conditional(conditional, basedir, inject, fail_on_undefined=False, jin
             elif conditional.find("is defined") != -1:
                 return False
             else:
-                raise errors.AnsibleError("error while evaluating conditional: %s" % conditional)
+                raise errors.AnsibleError("error while evaluating conditional: %s" % original)
         elif val == "True":
             return True
         elif val == "False":
             return False
         else:
-            raise errors.AnsibleError("unable to evaluate conditional: %s" % conditional)
+            raise errors.AnsibleError("unable to evaluate conditional: %s" % original)
 
     if not isinstance(conditional, basestring):
         return conditional