Import the stack module directly

Note: the patch imports "stack as parser" in some places to maintain
API (service.py and event.py).

Change-Id: I0409a04789f0ca362cb9ab0b612d47226d785334

heat/engine/event.py

@@ -52,7 +52,7 @@ class Event(object):
     @classmethod
     def load(cls, context, event_id, event=None, stack=None):
         '''Retrieve an Event from the database.'''
-        from heat.engine import parser
+        from heat.engine import stack as parser
 
         ev = event if event is not None else\
             db_api.event_get(context, event_id)

heat/engine/service.py

@@ -34,10 +34,10 @@ from heat.engine import clients
 from heat.engine import environment
 from heat.engine.event import Event
 from heat.engine import parameter_groups
-from heat.engine import parser
 from heat.engine import properties
 from heat.engine import resource
 from heat.engine import resources
+from heat.engine import stack as parser
 from heat.engine import stack_lock
 from heat.engine import template as templatem
 from heat.engine import watchrule

heat/engine/stack_resource.py

@@ -17,9 +17,9 @@ from heat.common import environment_format
 from heat.common import exception
 from heat.engine import attributes
 from heat.engine import environment
-from heat.engine import parser
 from heat.engine import resource
 from heat.engine import scheduler
+from heat.engine import stack as parser
 from heat.engine import template
 from heat.openstack.common.gettextutils import _
 from heat.openstack.common import log as logging

heat/engine/watchrule.py

@@ -16,7 +16,7 @@ import datetime
 
 from heat.common import exception
 from heat.db import api as db_api
-from heat.engine import parser
+from heat.engine import stack
 from heat.engine import timestamp
 from heat.openstack.common.gettextutils import _
 from heat.openstack.common import log as logging
@@ -256,11 +256,11 @@ class WatchRule(object):
         else:
             s = db_api.stack_get(self.context, self.stack_id,
                                  eager_load=True)
-            stack = parser.Stack.load(self.context, stack=s)
-            if (stack.action != stack.DELETE
-                    and stack.status == stack.COMPLETE):
+            stk = stack.Stack.load(self.context, stack=s)
+            if (stk.action != stk.DELETE
+                    and stk.status == stk.COMPLETE):
                 for refid in self.rule[self.ACTION_MAP[new_state]]:
-                    actions.append(stack.resource_by_refid(refid).signal)
+                    actions.append(stk.resource_by_refid(refid).signal)
             else:
                 LOG.warning(_("Could not process watch state %s for stack")
                             % new_state)

heat/tests/test_engine_service.py

@@ -36,11 +36,11 @@ from heat.engine.clients.os import keystone
 from heat.engine.clients.os import nova
 from heat.engine import dependencies
 from heat.engine import environment
-from heat.engine import parser
 from heat.engine.properties import Properties
 from heat.engine import resource as res
 from heat.engine.resources import instance as instances
 from heat.engine import service
+from heat.engine import stack as parser
 from heat.engine import stack_lock
 from heat.engine import template as templatem
 from heat.engine import watchrule

heat/tests/test_stack_resource.py

@@ -20,9 +20,9 @@ import mox
 from heat.common import exception
 from heat.common import template_format
 from heat.engine import environment
-from heat.engine import parser
 from heat.engine import resource
 from heat.engine import scheduler
+from heat.engine import stack as parser
 from heat.engine import stack_resource
 from heat.engine import template as templatem
 from heat.tests.common import HeatTestCase

heat/tests/utils.py

@@ -22,8 +22,8 @@ import sqlalchemy
 from heat.common import context
 from heat.db import api as db_api
 from heat.engine import environment
-from heat.engine import parser
 from heat.engine import resource
+from heat.engine import stack
 from heat.engine import template
 
 get_engine = db_api.get_engine
@@ -87,12 +87,12 @@ def parse_stack(t, params=None, stack_name='test_stack', stack_id=None,
     params = params or {}
     ctx = dummy_context()
     templ = template.Template(t)
-    stack = parser.Stack(ctx, stack_name, templ,
-                         environment.Environment(params), stack_id,
-                         timeout_mins=timeout_mins)
-    stack.store()
+    stk = stack.Stack(ctx, stack_name, templ,
+                      environment.Environment(params), stack_id,
+                      timeout_mins=timeout_mins)
+    stk.store()
 
-    return stack
+    return stk
 
 
 class PhysName(object):
@@ -109,7 +109,7 @@ class PhysName(object):
 
     def __eq__(self, physical_name):
         try:
-            stack, res, short_id = str(physical_name).rsplit('-', 2)
+            stk, res, short_id = str(physical_name).rsplit('-', 2)
         except ValueError:
             return False