config.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
##
# config.py: Stores configuration information.
##
# © 2017, Chris Ferrie (csferrie@gmail.com) and
#         Christopher Granade (cgranade@cgranade.com).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#     1. Redistributions of source code must retain the above copyright
#        notice, this list of conditions and the following disclaimer.
#
#     2. Redistributions in binary form must reproduce the above copyright
#        notice, this list of conditions and the following disclaimer in the
#        documentation and/or other materials provided with the distribution.
#
#     3. Neither the name of the copyright holder nor the names of its
#        contributors may be used to endorse or promote products derived from
#        this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
##


## FEATURES ###################################################################

from __future__ import absolute_import
from __future__ import division

## ALL ########################################################################

# We use __all__ to restrict what globals are visible to external modules.
__all__ = [
    'read_config',
    'save_config',
]

## TODO #######################################################################

# Put section header names here.

## IMPORTS ####################################################################

import sys, os
import configparser

## FUNCTIONS ##################################################################

def ensuredir(filename):
    dirname = os.path.dirname(filename)
    if not os.path.exists(dirname):
        os.makedirs(dirname)

def preffilename():
    if sys.platform.startswith('linux') or sys.platform.startswith('darwin') or sys.platform.startswith('cygwin'):	    
        # Unix-y
        configfile = os.path.expanduser('~/.config/qinfer.conf')
    elif sys.platform.startswith('win'):
        # Windows-y
        configfile = os.path.join(os.path.expandvars('%APPDATA%'), 'qinfer.conf')
    else:
        return NotImplemented

    ensuredir(configfile)
    return configfile
    
def read_config():
    #
    parser = configparser.SafeConfigParser()
    parser.read(preffilename())
    return parser
    
def save_config(parser):
    with open(preffilename(), 'w') as f:
        parser.write(f)