openstack/heat
Code Issues Proposed changes

Make template params resolution standalone

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This makes the two functions for resolving template data (Fn::FindInMap,
Ref, etc.) available outside of a Stack object.

Other programs can then import these functions and see how the template
parameters get resolved.

Change-Id: I92de937a3fb25f907404335cb71554036a807c50
Signed-off-by: Tomas Sedovic <tomas@sedovic.cz>
This commit is contained in:
Tomas Sedovic 2012-08-13 15:59:49 +02:00
parent 70bdc38a44
commit e611c7a517
1 changed files with 30 additions and 12 deletions
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42
heat/engine/parser.py
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@ -614,20 +614,38 @@ class Stack(object):
# restart the whole stack
def resolve_static_data(self, snippet):
return transform(snippet,
[functools.partial(self.t.resolve_param_refs,
parameters=self.parameters),
self.t.resolve_availability_zones,
self.t.resolve_find_in_map])
return resolve_static_data(self.t, self.parameters, snippet)
def resolve_runtime_data(self, snippet):
return transform(snippet,
[functools.partial(self.t.resolve_resource_refs,
resources=self.resources),
functools.partial(self.t.resolve_attributes,
resources=self.resources),
self.t.resolve_joins,
self.t.resolve_base64])
return resolve_runtime_data(self.t, self.resources, snippet)
def resolve_static_data(template, parameters, snippet):
'''
Resolve static parameters, map lookups, etc. in a template.
Example:
>>> template = Template(json.load(template_path))
>>> parameters = Parameters('stack', template, {'KeyName': 'my_key'})
>>> resolve_static_data(template, parameters, {'Ref': 'KeyName'})
'my_key'
'''
return transform(snippet,
[functools.partial(template.resolve_param_refs,
parameters=parameters),
template.resolve_availability_zones,
template.resolve_find_in_map])
def resolve_runtime_data(template, resources, snippet):
return transform(snippet,
[functools.partial(template.resolve_resource_refs,
resources=resources),
functools.partial(template.resolve_attributes,
resources=resources),
template.resolve_joins,
template.resolve_base64])
def transform(data, transformations):