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implement singleton as requirement 

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>
This commit is contained in:
Steven Armstrong 2011-11-03 15:44:51 +01:00
parent efedfbf47c
commit d0123acc2a
1 changed files with 12 additions and 9 deletions
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21
lib/cdist/emulator.py
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@ -156,19 +156,22 @@ class Emulator(object):
self.log.debug("Recording requirement: " + requirement)
requirement_parts = requirement.split(os.sep, 1)
requirement_type_name = requirement_parts[0]
requirement_object_id = requirement_parts[1]
# FIXME: Add support for omitted object id == singleton
#if len(requirement_parts) == 1:
#except IndexError:
# # no object id, must be singleton
# requirement_object_id = 'singleton'
# Remove / if existent in object id
try:
requirement_object_id = requirement_parts[1]
except IndexError:
# no object id, assume singleton
requirement_object_id = 'singleton'
# Remove leading / from object id
requirement_object_id = requirement_object_id.lstrip('/')
# Instantiate type which fails if type does not exist
requirement_type = core.Type(self.type_base_path, requirement_type_name)
if requirement_object_id == 'singleton' \
and not requirement_type.is_singleton:
raise IllegalRequirementError(requirement, "Missing object_id and type is not a singleton.")
# Instantiate object which fails if the object_id is illegal
requirement_object = core.Object(requirement_type, self.object_base_path, requirement_object_id)