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# Copyright (C) 2011-2012 Patrick Totzke <patricktotzke@gmail.com>
# This file is released under the GNU GPL, version 3 or a later revision.
# For further details see the COPYING file
from configobj import ConfigObj, ConfigObjError, flatten_errors
from validate import Validator
from errors import ConfigError
def read_config(configpath=None, specpath=None, checks={}):
"""
get a (validated) config object for given config file path.
:param configpath: path to config-file
:type configpath: str
:param specpath: path to spec-file
:type specpath: str
:param checks: custom checks to use for validator.
see `validate docs <http://www.voidspace.org.uk/python/validate.html>`_
:type checks: dict str->callable,
:raises: :class:`~alot.settings.errors.ConfigError`
:rtype: `configobj.ConfigObj`
"""
try:
config = ConfigObj(infile=configpath, configspec=specpath,
file_error=True, encoding='UTF8')
except (ConfigObjError, IOError), e:
raise ConfigError('Could not read "%s": %s' % (configpath, e))
if specpath:
validator = Validator()
validator.functions.update(checks)
results = config.validate(validator)
if results != True:
error_msg = 'Validation errors occurred:\n'
for (section_list, key, res) in flatten_errors(config, results):
if key is not None:
msg = 'key "%s" in section "%s" failed validation: %s'
msg = msg % (key, ', '.join(section_list), res)
else:
msg = 'section "%s" is malformed' % ', '.join(section_list)
error_msg += msg + '\n'
raise ConfigError(error_msg)
return config
def resolve_att(a, fallback):
""" replace '' and 'default' by fallback values """
if a is None:
return fallback
if a.background in ['default', '']:
a.background = fallback.background
if a.foreground in ['default', '']:
a.foreground = fallback.foreground
return a
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