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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
from urwid import AttrSpec
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 as e:
raise ConfigError(e)
except IOError:
raise ConfigError('Could not read %s and/or %s' % (configpath, specpath))
except UnboundLocalError:
# this works around a bug in configobj
msg = '%s is malformed. Check for sections without parents..'
raise ConfigError(msg % configpath)
if specpath:
validator = Validator()
validator.functions.update(checks)
try:
results = config.validate(validator, preserve_errors=True)
except ConfigObjError as e:
raise ConfigError(e.message)
if results is not True:
error_msg = ''
for (section_list, key, res) in flatten_errors(config, results):
if key is not None:
if res is False:
msg = 'key "%s" in section "%s" is missing.'
msg = msg % (key, ', '.join(section_list))
else:
msg = 'key "%s" in section "%s" failed validation: %s'
msg = msg % (key, ', '.join(section_list), res)
else:
msg = 'section "%s" is missing' % '.'.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', '']:
bg = fallback.background
else:
bg = a.background
if a.foreground in ['default', '']:
fg = fallback.foreground
else:
fg = a.foreground
return AttrSpec(fg, bg)
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