def load_module(self, name):
"""
Load a single module by name from this section.
"""
logging.info("Loading module %s from section %s",
name, self.name)
if not self.has_module(name):
raise Exception("No such such module: %s" % name)
filenames = itertools.chain(*[path_expand_recursive(m)
for m in self.modules])
for filename in filenames:
if filename.endswith(".py") and posixpath.exists(filename):
basename = posixpath.basename(filename)
basename = basename.replace(".py", "")
if basename == name:
globals = {}
exec(open(filename).read(), globals)
if "factory" not in globals:
raise Exception("Variable 'factory' not found in: %s" \
% filename)
module = globals["factory"]()
module.__module__ = name
config_name = "/".join([self.name, name])
config = self._config.parent.get_section(config_name)
# Set configuration values
variables = get_variables(module)
environ = dict([(k.lower(), v) for k, v in os.environ.items()])
for attribute, variable in variables.items():
if config and attribute.name in config:
value = config.get(attribute.name)
variable.set(value)
else:
value = variable.get()
if isinstance(value, str):
value = value % environ
variable.set(value)
elif isinstance(value, list):
value = [v % environ for v in value]
variable.set(value)
# Check required attributes
for attribute, variable in variables.items():
value = variable.get()
if value is None and variable._required:
raise Exception("Configuration '%s' missing " \
"required attribute: %s" \
% (config_name, attribute.name))
return module
raise Exception("Failed to find module '%s' in: %s" % (name, filenames))
def prompt_begin(self, interface):
for key, value in get_variables(self).items():
name = key.name.upper()
if name not in os.environ:
os.environ[name] = value.get()
