import os.path
from copy import deepcopy
from ..config import Configuration
from .base import Source
__all__ = ("HomeDirectory", "ConfigDirectory", "FileBasedSource")
class DirectoryModifier(object):
def __init__(self, target_file):
self.target_file = target_file
def __call__(self):
raise NotImplementedError()
class HomeDirectory(DirectoryModifier):
def __call__(self):
return os.path.expanduser(os.path.join("~", self.target_file))
class ConfigDirectory(DirectoryModifier):
def __call__(self):
config_dir = os.getenv("XDG_CONFIG_HOME") or os.path.expanduser(
os.path.join("~", ".config")
)
return os.path.join(config_dir, self.target_file)
class FileBasedSource(Source):
def __init__(self, files, base_path=None, combine=False):
super(FileBasedSource, self).__init__()
if isinstance(files, (str, DirectoryModifier)):
files = [files]
elif not isinstance(files, (tuple, list)):
raise TypeError("files must be a string or list of strings")
self.files = []
for target in files:
if isinstance(target, str):
self.files.append(target)
elif isinstance(target, DirectoryModifier):
self.files.append(target())
else:
raise TypeError("files must be a string or list of strings")
self.base_path = base_path or os.getcwd()
self.combine = combine
def get_config(self, settings, manager=None, parent=None):
parsed_settings = []
for file_source in self.files:
if os.path.isabs(file_source):
file_path = file_source
else:
file_path = os.path.join(self.base_path, file_source)
if os.path.exists(file_path):
file_settings = self.get_settings_from_file(
file_path, deepcopy(settings), manager=manager
)
if file_settings:
parsed_settings.append(file_settings)
if not self.combine:
# No need to gather any more, we only want one.
break
if parsed_settings:
config = parent
for parsed_setting in reversed(parsed_settings):
config = Configuration(settings=parsed_setting, parent=config)
else:
config = Configuration(settings=settings, parent=parent)
return config
def get_settings_from_file(self, file_path, settings, manager=None):
raise NotImplementedError()
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