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Location: NPO-Accounting/conservancy_beancount/conservancy_beancount/config.py - annotation
d920c5842a69
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text/x-python
reports: Start BaseSpreadsheet class.
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# Copyright © 2020 Brett Smith
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import configparser
import datetime
import decimal
import functools
import os
import re
import urllib.parse as urlparse
import requests.auth
import rt
from pathlib import Path
from typing import (
NamedTuple,
Optional,
Tuple,
Type,
)
from . import books
from . import rtutil
class RTCredentials(NamedTuple):
server: Optional[str] = None
user: Optional[str] = None
passwd: Optional[str] = None
auth: Optional[str] = None
@classmethod
def from_env(cls) -> 'RTCredentials':
values = dict(cls._field_defaults)
for key in values:
env_key = 'RT{}'.format(key.upper())
try:
values[key] = os.environ[env_key]
except KeyError:
pass
return cls(**values)
@classmethod
def from_rtrc(cls) -> 'RTCredentials':
values = dict(cls._field_defaults)
rtrc_path = Path.home() / '.rtrc'
try:
with rtrc_path.open() as rtrc_file:
for line in rtrc_file:
try:
key, value = line.split(None, 1)
except ValueError:
pass
else:
if key in values:
values[key] = value.rstrip('\n')
except OSError:
return cls()
else:
return cls(**values)
class Config:
_ENVIRON_DEFAULT_PATHS = {
'XDG_CACHE_HOME': Path('.cache'),
'XDG_CONFIG_HOME': Path('.config'),
}
def __init__(self) -> None:
self.file_config = configparser.ConfigParser()
def load_file(self, config_path: Optional[Path]=None) -> None:
if config_path is None:
config_path = self.config_file_path()
with config_path.open() as config_file:
self.file_config.read_file(config_file)
def load_string(self, config_str: str) -> None:
self.file_config.read_string(config_str)
def _dir_or_none(self, path: Path) -> Optional[Path]:
try:
path.mkdir(exist_ok=True)
except OSError:
return None
else:
return path
def _path_from_environ(self, key: str, default: Optional[Path]=None) -> Path:
try:
retval = Path(os.environ[key])
except (KeyError, ValueError):
ok = False
else:
# Per the spec, non-absolute paths should be ignored.
ok = retval.is_absolute()
if not ok:
retval = default or (Path.home() / self._ENVIRON_DEFAULT_PATHS[key])
return retval
def books_loader(self) -> Optional[books.Loader]:
books_path = self.books_path()
if books_path is None:
return None
else:
return books.Loader(books_path, self.fiscal_year_begin())
def books_path(self) -> Optional[Path]:
try:
retval = Path(self.file_config['Beancount']['books dir']).expanduser()
except (KeyError, ValueError):
ok = False
else:
ok = retval.is_absolute()
return retval if ok else None
def cache_dir_path(self, name: str='conservancy_beancount') -> Optional[Path]:
cache_root = self._path_from_environ('XDG_CACHE_HOME')
return (
self._dir_or_none(cache_root)
and self._dir_or_none(cache_root / name)
)
def config_file_path(self, name: str='conservancy_beancount') -> Path:
config_root = self._path_from_environ('XDG_CONFIG_HOME')
return Path(config_root, name, 'config.ini')
def fiscal_year_begin(self) -> books.FiscalYear:
s = self.file_config.get('Beancount', 'fiscal year begin', fallback='3 1')
match = re.match(r'([01]?[0-9])(?:\s*[-./ ]\s*([0-3]?[0-9]))?$', s.strip())
if match is None:
raise ValueError(f"fiscal year begin {s!r} has unknown format")
try:
month = int(match.group(1))
day = int(match.group(2) or 1)
# To check date validity we use an arbitrary year that's
# 1. definitely using the modern calendar
# 2. far enough in the past to not have books (pre-Unix epoch)
# 3. not a leap year
datetime.date(1959, month, day)
except ValueError as e:
raise ValueError(f"fiscal year begin {s!r} is invalid date: {e.args[0]}")
else:
return books.FiscalYear(month, day)
def payment_threshold(self) -> decimal.Decimal:
try:
return decimal.Decimal(self.file_config['Beancount']['payment threshold'])
except (KeyError, ValueError):
return decimal.Decimal(10)
def repository_path(self) -> Optional[Path]:
try:
return Path(os.environ['CONSERVANCY_REPOSITORY'])
except (KeyError, ValueError):
return None
def rt_credentials(self) -> RTCredentials:
all_creds = zip(
RTCredentials.from_env(),
RTCredentials.from_rtrc(),
RTCredentials(auth='rt'),
)
return RTCredentials._make(v0 or v1 or v2 for v0, v1, v2 in all_creds)
def rt_client(self,
credentials: RTCredentials=None,
client: Type[rt.Rt]=rt.Rt,
) -> Optional[rt.Rt]:
if credentials is None:
credentials = self.rt_credentials()
if credentials.server is None:
return None
urlparts = urlparse.urlparse(credentials.server)
rest_path = urlparts.path.rstrip('/') + '/REST/1.0/'
url = urlparse.urlunparse(urlparts._replace(path=rest_path))
if credentials.auth == 'basic':
auth = requests.auth.HTTPBasicAuth(credentials.user, credentials.passwd)
retval = client(url, http_auth=auth)
else:
retval = client(url, credentials.user, credentials.passwd)
if retval.login():
return retval
else:
return None
@functools.lru_cache(4)
def _rt_wrapper(self, credentials: RTCredentials, client: Type[rt.Rt]) -> Optional[rtutil.RT]:
wrapper_client = self.rt_client(credentials, client)
if wrapper_client is None:
return None
cache_dir_path = self.cache_dir_path()
if cache_dir_path is None:
cache_db = None
else:
cache_name = '{}@{}.sqlite3'.format(
credentials.user,
urlparse.quote(str(credentials.server), ''),
)
cache_path = cache_dir_path / cache_name
try:
cache_path.touch(0o600)
except OSError:
# RTLinkCache.setup() will handle the problem.
pass
cache_db = rtutil.RTLinkCache.setup(cache_path)
return rtutil.RT(wrapper_client, cache_db)
def rt_wrapper(self,
credentials: RTCredentials=None,
client: Type[rt.Rt]=rt.Rt,
) -> Optional[rtutil.RT]:
if credentials is None:
credentials = self.rt_credentials()
return self._rt_wrapper(credentials, client)
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