alot/settings/utils.py
# 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
import logging
from configobj import (ConfigObj, ConfigObjError, flatten_errors,
get_extra_values)
from validate import Validator
from urwid import AttrSpec
from .errors import ConfigError
from ..helper import call_cmd
def read_config(configpath=None, specpath=None, checks=None,
report_extra=False):
"""
get a (validated) config object for given config file path.
:param configpath: path to config-file or a list of lines as its content
:type configpath: str or list(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,
:param report_extra: log if a setting is not present in the spec file
:type report_extra: boolean
:raises: :class:`~alot.settings.errors.ConfigError`
:rtype: `configobj.ConfigObj`
"""
checks = checks or {}
try:
config = ConfigObj(infile=configpath, configspec=specpath,
file_error=True, encoding='UTF8')
except ConfigObjError as e:
msg = 'Error when parsing `%s`:\n%s' % (configpath, e)
logging.error(msg)
raise ConfigError(msg)
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(str(e))
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)
extra_values = get_extra_values(config) if report_extra else None
if extra_values:
msg = ['Unknown values were found in `%s`. Please check for '
'typos if a specified setting does not seem to work:'
% configpath]
for sections, val in extra_values:
if sections:
msg.append('%s: %s' % ('->'.join(sections), val))
else:
msg.append(str(val))
logging.info('\n'.join(msg))
return config
def read_notmuch_config(path):
"""
Read notmuch configuration.
This function calls the command "notmuch --config {path} config list" and
parses its output into a ``config`` dictionary, which is then returned.
The configuration value for a key under a section can be accessed with
``config[section][key]``.
The returned value is a dict ``config`` with
:param path: path to the configuration file, which is passed as
argument to the --config option of notmuch.
:type path: str
:raises: :class:`~alot.settings.errors.ConfigError`
:rtype: `dict`
"""
cmd = ['notmuch', '--config', path, 'config', 'list']
out, err, code = call_cmd(cmd)
if code != 0:
msg = f'failed to read notmuch config with command {cmd} (exit error: {code}):\n{err}'
logging.error(msg)
raise ConfigError(msg)
config = {}
for line in out.splitlines():
left_hand, right_hand = line.split("=", maxsplit=1)
section, key = left_hand.split(".", maxsplit=1)
config.setdefault(section, {})[key] = right_hand
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)