def find_provider(env, resource, class_path=None):
if not class_path:
providers = [PROVIDERS, LIBRARY_PROVIDERS]
for provider in providers:
if env.system.os_family in provider:
os_family_provider = provider[env.system.os_family]
else:
# take care of os extensions
for family in provider:
if OSCheck.is_in_family(env.system.os_family, family):
os_family_provider = provider[family]
if resource in os_family_provider:
class_path = os_family_provider[resource]
break
if resource in provider["default"]:
class_path = provider["default"][resource]
break
try:
mod_path, class_name = class_path.rsplit('.', 1)
except ValueError:
raise Fail("Unable to find provider for %s as %s" %
(resource, class_path))
mod = __import__(mod_path, {}, {}, [class_name])
return getattr(mod, class_name)
def get_provider(resource_type):
"""
Looking for {resource_type} provider implementation for current os and returning ready to use instance
:param resource_type existing provider type, case sensitive
:type resource_type str
:raise Fail
:return Provider instance
"""
os_family = OSCheck.get_os_family()
providers = [PROVIDERS, LIBRARY_PROVIDERS]
os_family_provider = None
class_path = None
for provider in providers:
if os_family in provider:
os_family_provider = provider[os_family]
else:
# take care of os extensions
for family in provider:
if OSCheck.is_in_family(os_family, family):
os_family_provider = provider[family]
if os_family_provider and resource_type in os_family_provider:
class_path = os_family_provider[resource_type]
break
if resource_type in provider["default"]:
class_path = provider["default"][resource_type]
break
try:
mod_path, class_name = class_path.rsplit('.', 1)
except ValueError:
raise Fail("Unable to find provider for %s as %s" %
(resource_type, class_path))
mod = __import__(mod_path, {}, {}, [class_name])
return getattr(mod, class_name)(None)
