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# Copyright 2015 Oliver Cope
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Handle config file and argument parsing
"""
import os
import iniherit
CONFIG_FILENAME = 'yoyo.ini'
CONFIG_EDITOR_KEY = 'editor'
CONFIG_NEW_MIGRATION_COMMAND_KEY = 'post_create_command'
def get_interpolation_defaults(path):
return {'here': os.path.dirname(path)}
def get_configparser(**defaults):
return iniherit.SafeConfigParser(defaults=defaults)
def update_argparser_defaults(parser, defaults):
"""
Update an ArgumentParser's defaults.
Unlike ArgumentParser.set_defaults this will only set defaults for
arguments the parser has configured.
"""
known_args = {action.dest for action in parser._actions}
parser.set_defaults(**{k: v
for k, v in defaults.items()
if k in known_args})
def read_config(path):
"""
Read the configuration file at ``path``, or return an empty
ConfigParse object if ``path`` is ``None``.
"""
if path is None:
return get_configparser()
config = get_configparser(**get_interpolation_defaults(path))
config.read([path])
return config
def save_config(config, path):
"""
Write the configuration file to ``path``.
"""
os.umask(0o77)
f = open(path, 'w')
try:
return config.write(f)
finally:
f.close()
def find_config():
"""Find the closest config file in the cwd or a parent directory"""
d = os.getcwd()
while d != os.path.dirname(d):
path = os.path.join(d, CONFIG_FILENAME)
if os.path.isfile(path):
return path
d = os.path.dirname(d)
return None
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