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Copy pathconfig.py
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138 lines (106 loc) · 4.03 KB
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# -*- coding: utf-8 -*-
from io import open
from os import path, chmod, makedirs
import configparser
import getpass
import appdirs
from . import __title__ as appname
from .logging import log
CONFIG_NAME = appname.lower() + '.cfg'
CONFIG_DIR = appdirs.user_config_dir(appname.lower())
CONFIG_PATH = path.join(CONFIG_DIR, CONFIG_NAME)
CONFIG_VERSION = 1
DEFAULT = object()
if not path.exists(CONFIG_DIR):
makedirs(CONFIG_DIR, 0o700)
class ConfidentialOption(Exception):
pass
class UnregisteredOption(Exception):
pass
class Config():
registry = {}
def __init__(self, config_path=None):
self.config_path = config_path or CONFIG_PATH
self._config = configparser.ConfigParser(allow_no_value=True)
def register(self, section, option, query, ask=False, getpass=False):
self.registry[(section, option)] = {
'query': query, 'ask': ask, 'getpass': getpass}
def _write(self):
with open(self.config_path, 'w') as configfile:
self._config.write(configfile)
chmod(self.config_path, 0o600)
def set(self, section, option, value):
if not self._config.has_section(section):
self._config.add_section(section)
self._config.set(section, option, value)
self._write()
def get(self, section, option, default=DEFAULT):
self._config.read(self.config_path)
try:
value = self._config.get(section, option)
if value is None:
raise ConfidentialOption
return value
except (configparser.NoSectionError, configparser.NoOptionError,
ConfidentialOption) as e:
# if getter default is set, return it instead
if default is not DEFAULT:
return default
# get registered config option
try:
reg_option = self.registry[(section, option)]
except KeyError:
raise UnregisteredOption((section, option))
# get value from user query
if reg_option['getpass']:
value = getpass.getpass(reg_option['query'] + ": ")
else:
value = input(reg_option['query'] + ": ").strip()
# user does not want to be prompted to save this option
if isinstance(e, ConfidentialOption):
return value
# user has choice ('ask') to save option value
if reg_option['ask']:
c = input('Would you like to save this value in {}? '
'nr = no, and remember choice\n'
'[Y/n/nr]'.format(self.config_path)).lower()
if c == 'n':
return value
elif c == 'nr':
self.set(section, option, None)
return value
self.set(section, option, value)
return value
def backup(config):
from datetime import datetime
t = datetime.now()
p = config.config_path
config.config_path = (config.config_path + "." +
t.strftime("%Y-%m-%dT%H-%M-%S") + '.bak')
config._write()
log.notice('Old config backed up at {}', config.config_path)
config.config_path = p
def imgur_api_change(config):
if config.get('Imgur', 'client_id', None) is not None:
config._config.remove_section('Imgur')
config._write()
else:
log.warning('section already removed')
def migrate_config(config):
migrations = {0: (1, imgur_api_change)}
version_args = lambda v: ('General', 'version', v) # noqa: E731
cur = int(config.get(*version_args(0)))
if cur in migrations:
backup(config)
while True:
cur = int(config.get(*version_args(0)))
try:
new, mig = migrations[cur]
except KeyError:
break
else:
log.notice('Migrating config from {} to {}'.format(cur, new))
mig(config)
config.set(*version_args(str(new)))
config = Config()
migrate_config(config)